CN113873613A

CN113873613A - Access control method and related device

Info

Publication number: CN113873613A
Application number: CN202010617622.4A
Authority: CN
Inventors: 彭文杰
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-12-31

Abstract

The application provides an access control method and a related device, wherein the method comprises the following steps: the first terminal equipment UE1 sends access control information of the serving cell of UE1 to the second terminal equipment UE 2; wherein the serving cell's access control information is used for the UE2 to determine whether to allow the UE2 to access the serving cell based on the serving cell's access control information and the access parameters of the UE 2. The application provides an access control method when a cell is accessed through a relay terminal.

Description

Access control method and related device

Technical Field

The present application relates to the field of communications technologies, and in particular, to an access control method and a related apparatus.

Background

In the wireless communication technology, a terminal-to-Network relay (UE-to-Network relay) technology is considered as a communication technology capable of effectively improving cell coverage.

Fig. 1 is a schematic diagram of a network architecture of a wireless communication system. As shown in fig. 1, a plurality of terminals (UEs) are respectively located in a signal coverage area and a periphery of the signal coverage area of a cell of a Radio Access Network (RAN), a UE far from a center of the cell may be referred to as a remote terminal (remote UE), and the UE within the cell coverage area may serve as a relay terminal (relay UE) to forward interaction information between the remote UE and the RAN, so that the remote UE accesses the RAN.

When the remote UE needs to access the RAN through the remote UE, the remote UE sends a (radio resource control, RRC) connection establishment request to the remote UE, and then the remote UE forwards the message to the RAN, where the RRC connection establishment request is used to establish an RRC connection between the remote UE and the RAN. Since all remote UEs can access the RAN through relay UEs, the load of the remote UEs accessing the cell is too heavy. Currently, there is a need for an access control method for remote UEs.

Disclosure of Invention

The application provides an access control method and a related device based on a relay terminal access cell.

In a first aspect, the present application provides an access control method, applied to a UE1 side, the method including:

a first terminal equipment UE1 sending access control information for a serving cell of a second terminal equipment UE2 for the UE 1;

wherein the access control information for the serving cell is used by the UE2 to determine whether to allow the UE2 to access the serving cell based on the access control information for the serving cell and the access parameters for the UE 2.

In an embodiment of the present application, the UE2 may perform the admission process flow when determining to admit the UE2 to the cell, for example, sending a unicast connection establishment request to the UE1, e.g., sending a first RRC connection establishment request to the UE 1; the UE2 may perform a barring processing procedure when it is determined to bar the UE2 from accessing the cell, e.g., the UE2 performs the step of reselecting the relay terminal, as another example, the UE2 sends a unicast connection release to the UE 1. The UE1 may perform UE 1-related admission processing procedures when determining to admit the UE2 to a cell, such as sending a unicast connection establishment response to the UE2 when receiving a unicast connection establishment request, and forwarding a first RRC connection establishment request to the RAN when receiving the first RRC connection establishment request. That is, the UE2 is allowed to send RRC connection establishment requests to the RAN through the UE1 and the UE1 agrees to forward interaction messages between the UE2 and the RAN for establishing RRC connections.

By adopting the technical scheme provided by the embodiment of the application, the access control at each stage of accessing the cell by the UE2 through the UE1 can be realized.

In an optional implementation of the first aspect, before the UE1 sends access control information of a serving cell of the UE1 to the UE2, the method further comprises: receiving PLMN information of the UE2 sent by the UE 2;

the UE1 sending access control information for a serving cell of the UE1 to UE2, including:

sending, to the UE2, access control information of the serving cell corresponding to PLMN information of the UE 2.

In the embodiment of the present application, the access control information corresponding to the PLMN information of the UE2 is the access control information applicable to the PLMN ID.

In an optional implementation manner of the first aspect, the sending, by the UE1, the access control information of the serving cell of the UE1 to the UE2 includes:

the UE1 sends a first discovery message to the UE2 carrying access control information for the serving cell.

In the embodiment of the present application, the first discovery message is a discovery request in a Model a discovery process.

In an optional implementation manner of the first aspect, the receiving PLMN information of the UE2 sent by the UE2 includes:

Receiving a second discovery request carrying PLMN information of the UE2 sent by the UE 2.

In this embodiment, the second discovery request is a discovery request in a Model B discovery process.

sending a second discovery response to the UE2 carrying access control information for the serving cell.

In the embodiment of the present application, the second discovery response is a discovery response in the Model B discovery process.

receiving a unicast connection establishment request carrying PLMN information of the UE2 sent by the UE 2; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2.

sending a unicast connection establishment response carrying the access control information of the serving cell to the UE 2; wherein the unicast connection establishment response is to indicate that the sidelink unicast connection establishment between the UE1 and the UE2 is complete.

In an optional implementation manner of the first aspect, the receiving PLMN information of the UE2 sent by the UE2 includes: receiving a second sidelink RRC message carrying PLMN information of the UE2 sent by the UE 2.

sending a first sidelink RRC message to the UE2 carrying access control information for the serving cell.

In an optional implementation of the first aspect, after the UE1 sends access control information of a serving cell of the UE1 to the UE2, the method further comprises:

receiving a unicast connection establishment request sent by the UE 2;

sending a unicast connection establishment response to the UE 2;

wherein the unicast connection establishment request is transmitted by the UE2 when it is determined to allow the UE2 to access the serving cell; the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2.

In an optional implementation of the first aspect, the method further comprises:

receiving a first RRC connection establishment request sent by the UE 2; wherein the first RRC connection setup request is for requesting establishment of an RRC connection between the UE2 and a RAN to which the serving cell belongs;

Sending the first RRC connection setup request to the RAN.

receiving a first RRC connection establishment request sent by the UE 2; wherein the first RRC connection setup request is transmitted by the UE2 when determining to allow the UE2 to access the serving cell; the first RRC connection establishment request is for requesting establishment of an RRC connection between the UE2 and a RAN to which the cell belongs;

sending the first RRC connection setup request to the RAN.

In an optional implementation manner of the first aspect, before the sending the first RRC connection establishment request to the RAN, the method further includes:

sending a second RRC connection setup request to the RAN while the UE1 is in a non-connected state; wherein the second RRC connection setup request is to request establishment of an RRC connection between the UE1 and the RAN.

In this embodiment, when the RRC connection is in the Idle state, the second RRC connection establishment request is the RRC request, and when the RRC connection is in the Inactive state, the second RRC connection establishment request is the RRC request.

In an optional implementation manner of the first aspect, the connection establishment cause value in the second RRC connection establishment request is: a relay, or a connection establishment cause value in the first RRC connection establishment request.

receiving a unicast connection release sent by the UE 2; wherein the unicast connection release is transmitted by the UE2 when it is determined to prohibit the UE2 from accessing the serving cell; the unicast connection release is for requesting release of a sidelink unicast connection between the UE1 and the UE 2.

In the present embodiment, the UE1 may then locally release the side-link unicast connection.

In an optional implementation manner of the first aspect, the connection release cause value in the unicast connection release is a barring access cell.

receiving a unicast connection establishment request sent by the UE 2;

In an optional implementation manner of the first aspect, after the sending the second RRC connection establishment request to the RAN, the method includes:

receiving a second RRC connection rejection sent by the RAN;

sending a unicast connection rejection to the UE 2.

In an optional implementation of the first aspect, after the UE1 sends the access control information of the serving cell of the UE1 to the UE2, the method further comprises:

Receiving a second RRC connection rejection sent by the RAN;

sending a unicast connection release to the UE 2.

In an optional implementation manner of the first aspect, the connection rejection reason value in the unicast connection rejection is that relaying is not supported.

In an optional implementation manner of the first aspect, the connection release reason value in the unicast connection release is that relaying is not supported.

In an optional implementation manner of the first aspect, the connection rejection reason value in the second RRC connection rejection is that relaying is not supported.

In an optional implementation manner of the first aspect, the access parameter of the UE2 includes: access type AC and access indication AI.

In an optional implementation manner of the first aspect, before the UE1 sends the access control information of the serving cell of the UE1 to the UE2, the method includes:

receiving access control information for at least one cell sent by the RAN, the at least one cell comprising a serving cell for the UE 1.

In a second aspect, an embodiment of the present application provides an access control method, applied to a UE2 side, including:

a second terminal UE2 receiving access control information for a serving cell of the UE1 sent by a first terminal UE 1;

Determining whether to allow the UE2 to access the serving cell based on the access control information for the serving cell and the access parameters of the UE 2.

In an embodiment of the present application, the method further includes: performing an admission process flow when it is determined that the UE2 is admitted to access the serving cell; alternatively, a barring processing procedure is performed when it is determined to bar the UE2 from accessing the serving cell.

In an optional implementation of the second aspect, before the UE2 receives the access control information of the serving cell of the UE1 sent by the UE1, the method further comprises: sending PLMN information of the UE2 to the UE 1;

the UE2 receiving access control information of a serving cell of the UE1 sent by UE1, including:

receiving access control information of the serving cell corresponding to the PLMN information of the UE2 sent by the UE 1.

In an optional implementation manner of the second aspect, the receiving, by the UE2, the access control information of the serving cell of the UE1 sent by the UE1 includes: receiving a first discovery message carrying access control information of a serving cell of the UE1 sent by the UE 1;

the method further comprises the following steps:

upon determining to allow the UE2 to access the serving cell, sending a unicast connection establishment request to the UE 1; alternatively, the first and second electrodes may be,

The step of reselecting a relay terminal is performed when it is determined that the UE2 is prohibited from accessing the serving cell.

In an optional implementation of the second aspect, the sending PLMN information of the UE2 to the UE1 includes:

sending a second discovery request to the UE1 carrying PLMN information of the UE 2.

In an optional implementation manner of the second aspect, the receiving, by the UE2, the access control information of the serving cell of the UE1 sent by the UE1 includes: receiving a second discovery response carrying access control information of a serving cell of the UE1 sent by the UE 1;

the method further comprises the following steps:

upon determining to allow the UE2 to access the serving cell, sending a unicast connection establishment request to the UE1, wherein the unicast connection establishment request requests establishment of a sidelink unicast connection between the UE1 and the UE 2; alternatively, the first and second electrodes may be,

sending a unicast connection establishment request carrying PLMN information of the UE2 to the UE 1; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2.

In an optional implementation manner of the second aspect, the receiving, by the UE2, the access control information of the serving cell of the UE1 sent by the UE1 includes: receiving a unicast connection establishment response carrying access control information of a serving cell of the UE1 sent by the UE1, wherein the unicast connection establishment response is used for indicating that the establishment of the sidelink unicast connection between the UE1 and the UE2 is completed;

the method further comprises the following steps:

upon determining to allow the UE2 to access the serving cell, transmitting a first RRC connection establishment request to the UE1, wherein the first RRC connection establishment request requests establishment of an RRC connection between the UE2 and the RAN; alternatively, the first and second electrodes may be,

upon determining to prohibit the UE2 from accessing the serving cell, sending a unicast connection release to the UE1, wherein the unicast connection release is for requesting release of a sidelink unicast connection between the UE1 and the UE 2.

sending a second sidelink RRC message to the UE1 carrying PLMN information of the UE 2.

In an optional implementation manner of the second aspect, the receiving, by the UE2, the access control information of the serving cell of the UE1 sent by the UE1 includes: receiving a first sidelink RRC message carrying access control information of a serving cell of the UE1 sent by the UE 1;

The method further comprises the following steps:

In an optional implementation of the second aspect, after the UE2 sends the unicast connection establishment request to the UE1, the method further comprises:

receiving a unicast connection establishment response sent by the UE 1;

sending a first RRC connection setup request to the UE1, the first RRC connection setup request requesting establishment of an RRC connection between the UE2 and a RAN to which the serving cell belongs.

In an optional implementation manner of the second aspect, after the sending of the first RRC connection setup request to the UE1, the method further includes:

receiving a first RRC connection setup sent by the UE 1;

sending a first RRC connection setup complete to the UE 1.

receiving a first RRC connection rejection sent by the UE1, wherein the first RRC connection rejection is sent when the UE1 is barred as a relay terminal;

sending a unicast connection release to the UE1, wherein the unicast connection release is to release a sidelink unicast connection between the UE1 and the UE 2;

the step of reselecting the relay terminal is performed.

In an optional embodiment of the second aspect, the method further comprises:

receiving a unicast connection release sent by the UE1, wherein the unicast connection release is sent when the UE1 is prohibited from acting as a relay terminal, and the unicast connection release is used for releasing a sidelink unicast connection between the UE1 and the UE 2;

the step of reselecting the relay terminal is performed.

In an optional implementation manner of the second aspect, the connection release reason value in the unicast connection release is a barring access cell.

In an optional implementation manner of the second aspect, the access parameter of the UE2 includes: access type AC and access indication AI.

In a third aspect, an embodiment of the present application provides an access control method, applied to a UE2 side, including:

the second terminal equipment UE2 sending the access parameters of the UE2 to the first terminal equipment UE 1;

wherein the access parameters of the UE2 are used for the UE1 to determine whether to allow the UE2 to access the serving cell based on the access control information of the serving cell of the UE1 and the access parameters of the UE 2.

In an optional implementation of the third aspect, the access parameters of the UE2 include an access type, AC, and an access indication, AI, of the UE 2.

In an optional implementation of the third aspect, the access parameters of the UE2 include PLMN information of the UE 2;

wherein the PLMN information of the UE2 is used for the UE1 to determine whether to allow the UE2 to access the serving cell according to the access parameter of the UE2 and the access control information of the serving cell corresponding to the PLMN information of the UE 2.

In an optional implementation of the third aspect, the UE2 sending the access parameters of the UE2 to the UE1 includes:

sending a second discovery request to the UE1 carrying access parameters for the UE 2.

Sending a unicast connection establishment request carrying the access parameters of the UE2 to the UE 1;

wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2.

sending a third side link RRC message to the UE1 carrying the access parameters of the UE 2.

sending a first RRC connection setup request and access parameters of the UE2 to the UE 1; alternatively, the first and second electrodes may be,

sending a first RRC connection setup request to the UE1 carrying access parameters for the UE 2;

wherein the first RRC connection setup request is for requesting establishment of an RRC connection between the UE2 and the RAN to which the serving cell belongs.

In an optional implementation of the third aspect, after the UE2 sends the access parameters of the UE2 to the UE1, the method further comprises:

receiving a second discovery response sent by the UE1, the second discovery response sent by the UE1 when it is determined that the UE2 is allowed to access the serving cell;

Sending a unicast connection establishment request to the UE 1; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2.

receiving a second discovery rejection sent by the UE1, the second discovery rejection being sent by the UE1 when determining to prohibit the UE2 from accessing the serving cell.

receiving a second discovery response sent by the UE1, the second discovery response including a determination of whether to allow the UE2 access to the serving cell.

In an optional embodiment of the third aspect, the method further comprises:

transmitting a unicast connection establishment request to the UE1 when the UE2 is determined to be allowed to access the serving cell; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2;

alternatively, the first and second electrodes may be,

the step of reselecting a relay terminal is performed when the determination result is that the UE2 is prohibited from accessing the serving cell.

receiving a unicast connection establishment response sent by the UE1, the unicast connection establishment response being sent by the UE1 when it is determined that the UE2 is allowed to access the serving cell;

sending a first RRC connection setup request to the UE 1; wherein the first RRC connection setup request is for requesting establishment of an RRC connection between the UE2 and the RAN to which the serving cell belongs.

receiving a unicast connection rejection sent by the UE1, the unicast connection rejection being sent by the UE1 when determining to prohibit the UE2 from accessing the serving cell.

receiving a unicast connection establishment request response sent by the UE1, the unicast connection establishment response including a determination result of whether to allow the UE2 to access the serving cell.

receiving a fourth side link RRC message sent by the UE1, the fourth side link RRC message including a determination of whether to allow the UE2 access to the serving cell.

In an optional embodiment of the third aspect, the method further comprises:

upon determining to allow the UE2 to access the serving cell, sending a first RRC connection setup request to the UE 1; wherein the first RRC connection setup request is for requesting establishment of an RRC connection between the UE2 and a RAN to which the serving cell belongs; alternatively, the first and second electrodes may be,

upon determining to prohibit the UE2 from accessing the serving cell, sending a unicast connection release to the UE 1; wherein the unicast connection release is to release a sidelink unicast connection between the UE1 and the UE 2.

receiving a first RRC connection establishment sent by the UE1, the first RRC connection establishment sent by the UE1 when determining to allow the UE2 to access the serving cell;

Sending a first RRC connection setup complete to the UE 1.

receiving a first RRC connection rejection sent by the UE1, the first RRC connection rejection being sent by the UE1 when determining to prohibit the UE2 from accessing the serving cell; alternatively, the first and second electrodes may be,

receiving a barring indication sent by the UE1, the barring indication indicating that the UE2 is barred from accessing the serving cell.

In an optional implementation manner of the third aspect, the reject cause value in the second discovery reject is a barring access cell.

In an optional implementation manner of the third aspect, the connection rejection reason value in the unicast connection rejection is a barring access cell.

In an optional implementation manner of the third aspect, the connection release reason value for the unicast connection release is a barring access cell.

In an optional implementation manner of the third aspect, the connection rejection reason value in the first RRC connection rejection is a barring access cell.

And receiving the unicast connection rejection sent by the UE1, wherein the connection rejection reason value in the unicast connection rejection is that the relay is not supported.

and receiving the unicast connection release sent by the UE1, wherein the rejection reason value in the unicast connection release is that the relay is not supported.

In an optional embodiment of the third aspect, the method further comprises: the step of reselecting the relay terminal is performed.

In a fourth aspect, the present application provides an access control method, applied to a UE1 side, the method including:

a first terminal equipment UE1 receiving access parameters of the UE2 sent by a second terminal equipment UE 2;

determining whether to allow the UE2 to access the serving cell based on the access control information of the serving cell of the UE1 and the access parameters of the UE 2.

In an optional implementation of the fourth aspect, the access parameters of the UE2 include PLMN information of the UE 2;

the determining whether to allow the UE2 to access the serving cell according to the access control information of the serving cell of the UE1 and the access parameters of the UE2 includes: determining whether to allow the UE2 to access the serving cell according to the access control information of the serving cell corresponding to the PLMN information of the UE2 and the access parameter of the UE 2.

In an optional implementation manner of the fourth aspect, after the UE1 receives the access parameter of the UE2 sent by the UE2, the method further includes: sending the determination to the UE 2;

wherein the determination is indicative of allowing or prohibiting the UE2 to access the serving cell.

In an embodiment of the present application, upon determining to allow the UE2 to access the serving cell, the UE1 sends a determination to the UE2 that includes: sending an allowance indication to the UE 2; alternatively, the first and second electrodes may be,

upon determining to prohibit the UE2 from accessing the serving cell, the UE1 sends a determination to the UE2 that includes: sending a barring indication to the UE 2.

In an optional implementation manner of the fourth aspect, the receiving, by the UE1, the access parameter of the UE2 sent by the UE2 includes:

receiving a second discovery request carrying access parameters of the UE2 sent by the UE 2; alternatively, the first and second electrodes may be,

receiving a unicast connection establishment request carrying the access parameters of the UE2 sent by the UE 2; alternatively, the first and second electrodes may be,

receiving a first sidelink RRC message carrying access parameters of the UE2 and sent by the UE 2; alternatively, the first and second electrodes may be,

receiving a first RRC connection establishment request carrying the access parameters of the UE2 sent by the UE 2.

In an optional implementation manner of the fourth aspect, the receiving, by the UE1, the access parameter of the UE2 sent by the UE2 includes: receiving a second discovery request carrying access parameters of the UE2 sent by the UE 2;

after the UE1 determines whether to allow the UE2 to access the serving cell based on the access control information for the UE1 serving cell and the access parameters of the UE2, including:

upon determining to allow the UE2 to access the serving cell, transmitting a second discovery response to the UE 2; alternatively, upon determining to prohibit the UE2 from accessing the serving cell, sending a second discovery reject to the UE 2.

In an embodiment of the present application, the second discovery response may be used to instruct the UE2 to send a unicast connection establishment request to the UE 1.

receiving a unicast connection establishment request carrying the access parameters of the UE2 sent by the UE 2; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2;

Upon determining to allow the UE2 to access the serving cell, sending a unicast connection establishment response to the UE 2; alternatively, sending a unicast connection rejection to the UE2 when it is determined to prohibit the UE2 from accessing the serving cell.

In an embodiment of the application, the unicast connection establishment response may be used to instruct the UE2 to send a first RRC connection establishment request to the UE 1.

In an optional implementation manner of the fourth aspect, the receiving, by the UE1, the access parameter of the UE2 sent by the UE2 includes: receiving a third side link RRC message carrying the access parameters of the UE2 and sent by the UE 2;

the sending of the determination to the UE2 includes:

sending a fourth side link RRC message to the UE2 carrying the determination; wherein the determination is to allow or prohibit the UE2 to access the serving cell.

In an optional implementation manner of the fourth aspect, the receiving, by the UE1, the access parameter of the UE2 sent by the UE2 includes: receiving a first RRC connection establishment request which is sent by the UE2 and carries the access parameters of the UE 2; wherein the first RRC connection setup request is for requesting establishment of an RRC connection between the UE2 and a RAN to which the serving cell belongs;

upon determining to allow the UE2 to access the serving cell, sending the first RRC connection setup request to a RAN to which the serving cell belongs; or, upon determining to prohibit the UE2 from accessing the serving cell, send a first RRC connection reject or a unicast connection release to the UE 2; the unicast connection release is for releasing a side link unicast connection between the UE1 and the UE 2.

In an optional implementation manner of the fourth aspect, the connection rejection reason value in the unicast connection rejection is a barring access cell.

In an optional implementation manner of the fourth aspect, the connection rejection reason value in the first RRC connection rejection is a barring access cell.

In an optional implementation manner of the fourth aspect, the sending the first RRC connection setup request to the RAN to which the serving cell belongs when determining that the UE2 is allowed to access the serving cell includes:

upon determining that the UE2 is allowed to access the serving cell and that the UE1 is in a non-connected state, sending a second RRC connection setup request to the RAN; wherein the second RRC connection setup request is to request establishment of an RRC connection between the UE1 and the RAN;

Receiving second RRC connection establishment sent by the RAN;

sending the first RRC connection setup request to the RAN.

In an optional implementation manner of the fourth aspect, the connection establishment cause value in the second RRC connection establishment request is a relay, or the connection establishment cause value in the first RRC connection establishment request.

In a fifth aspect, an embodiment of the present application provides an access control method, applied to a UE1 side, including:

sending, to a UE2, a determination of whether to allow the UE2 access to a serving cell of the UE 1;

wherein the determination result is obtained according to the access parameter of the UE2 and the access control information of the serving cell.

In an optional embodiment of the fifth aspect, the access parameters of the UE2 include PLMN information of the UE 2;

the determination result is obtained according to the access control information of the serving cell corresponding to the PLMN information of the UE2 and the access parameter of the UE 2.

In an optional implementation of the fifth aspect, the receiving, by the UE1, the access parameter of the UE2 sent by the UE2 includes:

Receiving a second discovery request carrying access parameters of the UE2 sent by the UE 2;

and receiving a unicast connection establishment request carrying the access parameters of the UE2 sent by the UE 2.

receiving a third side link RRC message carrying the access parameters of the UE2 sent by the UE 2.

In an optional implementation manner of the fifth aspect, the sending, to the UE2, the determination result of whether to allow the UE2 to access the serving cell includes:

sending a second discovery response carrying the determination to the UE 2.

sending a unicast connection establishment response carrying the determination result to the UE 2.

Sending a fourth side link RRC message to the UE2 carrying the determination.

In an optional implementation of the fifth aspect, the sending, to the UE2, the determination whether to allow the UE2 to access the serving cell of the UE1 includes:

transmitting a second discovery response to the UE2 when the determination is allowable; wherein the second discovery response is used to indicate that the determination result is allowable; alternatively, the first and second electrodes may be,

sending a second discovery rejection to the UE2 when the determination is barred; wherein the second discovery rejection is used to indicate that the determination is prohibited.

In an optional implementation of the fifth aspect, the sending, by the UE1, the determination of whether to allow the UE2 to access the cell to the UE2 includes:

sending a unicast connection establishment response to the UE2 when the determination result is allowed; wherein the unicast connection establishment response is used for indicating that the determination result is allowed; alternatively, the first and second electrodes may be,

sending a unicast connection rejection to the UE2 when the determination is forbidden; wherein the unicast connection rejection is used to indicate that the determination result is forbidden.

Receiving the first RRC connection establishment request carrying the access parameters of the UE2 sent by the UE 2; wherein the first RRC connection setup request is to request establishment of an RRC connection between the UE2 and a RAN to which a serving cell of the UE1 belongs.

sending a first RRC connection setup carrying the determination to the UE 2.

In the embodiment of the present application, when the determination result is carried in the first RRC connection setup, the UE1 has actually forwarded the first RRC connection setup request to the RAN. Therefore, upon receiving the first RRC connection establishment request carrying the access parameters of the UE2, the UE1 may send a first RRC connection rejection directly to the UE2 if the UE1 determines to prohibit.

In a sixth aspect, an embodiment of the present application provides an access control method, applied to a UE2 side, including:

the second terminal equipment UE2 receives the discovery process message sent by the first terminal equipment UE 1;

upon determining to allow the UE2 to access the serving cell of the UE1, sending a unicast connection establishment request to UE 1;

In an embodiment of the present application, the discovery procedure message may be used to determine whether to allow the UE2 to access the serving cell of the UE 1.

In the embodiment of the application, a first terminal equipment UE1 sends access control information of a serving cell of a UE1 to a second terminal equipment UE 2; the access control information for the serving cell may be used for the UE2 to determine whether to allow the UE2 access to the serving cell of the UE 1.

In an optional implementation manner of the sixth aspect, the discovery procedure message includes: access control information of the serving cell; the method further comprises the following steps:

In an optional implementation manner of the sixth aspect, before the UE2 receives the discovery procedure message sent by the UE1, the method includes: sending access parameters for the UE2 to the UE 1; wherein the access parameter of the UE2 is to instruct the UE1 to determine whether to allow the UE2 to access the serving cell based on the access control information of the serving cell and the access parameter of the UE 2;

the discovery process message includes: a determination of whether to allow the UE2 access to the serving cell.

In an optional implementation manner of the sixth aspect, the access parameter of the UE2 includes: PLMN information of the UE 2;

wherein the access parameter of the UE2 is used for indicating that the UE1 determines whether to allow the UE2 to access the serving cell according to the access control information corresponding to the PLMN information and the access parameter of the UE 2.

In an optional implementation manner of the sixth aspect, the determining whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameter of the UE2 includes:

acquiring access control information of the serving cell corresponding to the PLMN information of the UE 2;

determining whether to allow the UE2 to access the serving cell according to the acquired access control information and the access parameters of the UE 2.

In an optional implementation manner of the sixth aspect, before the UE2 receives the discovery procedure message sent by the UE1, the method includes: sending PLMN information of the UE2 to the UE 1;

the access control information of the serving cell includes: access control information of the serving cell corresponding to PLMN information of the UE 2.

In an optional implementation of the sixth aspect, the discovery procedure message is a first discovery message sent by the UE1 to the UE 2.

In an optional implementation manner of the sixth aspect, the sending, to the UE1, PLMN information of the UE2 includes: sending a second discovery request to the UE1 carrying PLMN information of the UE 2;

the discovery process message is a second discovery response carrying access control information of the serving cell.

In an optional implementation manner of the sixth aspect, the sending, to the UE1, the access parameter of the UE2 includes: sending a second discovery request to the UE1 carrying access parameters for the UE 2;

the discovery process message is a second discovery response carrying the determination result.

In an alternative embodiment of the sixth aspect, the method further comprises:

receiving a unicast connection establishment response sent by the UE 1;

In an optional implementation manner of the sixth aspect, before the sending the unicast connection establishment request to the UE1, the method further includes: obtaining a cause value for establishing an RRC connection between the UE2 and the RAN;

the unicast connection establishment request includes the cause value for establishing the RRC connection between the UE2 and the RAN.

In this embodiment, the connection establishment cause value of the second RRC connection establishment request sent by the UE1 to the RAN may be a relay, or a cause value for establishing an RRC connection between the UE2 and the RAN, which is carried in the unicast connection establishment request, or a connection establishment cause value of the first RRC connection establishment request.

In an alternative embodiment of the sixth aspect, the method further comprises:

In an optional implementation manner of the sixth aspect, the access parameter of the UE2 includes: access type AC and access indication AI.

In a seventh aspect, an embodiment of the present application provides an access control method, applied to a UE2 side, including:

the step of reselecting a relay terminal is performed when it is determined that the UE2 is prohibited from accessing the serving cell of the UE 1.

In an optional implementation of the seventh aspect, the access parameters of the UE2 include an access type, AC, and an access indication, AI, of the UE 2.

In an optional implementation of the seventh aspect, the access parameter of the UE2 includes PLMN information of the UE 2;

Wherein the PLMN information of the UE2 is used to instruct the UE1 to determine whether to allow the UE2 to access the serving cell according to the access parameter of the UE2 and the access control information of the serving cell corresponding to the PLMN information of the UE 2.

In an optional implementation manner of the seventh aspect, the sending, by the UE2, the access parameters of the UE2 to the UE1 includes:

In an optional implementation manner of the seventh aspect, after the UE2 sends the access parameters of the UE2 to the UE1, the method further includes:

In an embodiment of the present application, the step of reselecting the relay terminal includes: transmitting a second discovery request in a broadcast manner; alternatively, a first discovery message sent by a UE other than the UE1 is received.

In an eighth aspect, an embodiment of the present application provides an access control method, applied to a UE2 side, including:

the second terminal equipment UE2 receives the unicast connection establishment response sent by the first terminal equipment UE 1;

upon determining to allow the UE2 to access a serving cell of the UE1, sending a first RRC connection setup request to the UE 1;

In an embodiment of the application, the UE2 sends a first RRC connection establishment request to the UE1 to cause the UE1 to forward the first RRC connection establishment request to the RAN. That is, the UE2 sends a first RRC connection setup request to the RAN through the UE 1.

In an optional implementation manner of the eighth aspect, the unicast connection establishment response comprises: access control information of the serving cell;

after the UE2 receives the unicast connection establishment response sent by the UE1, the method includes:

In an optional implementation manner of the eighth aspect, before the UE2 receives the unicast connection establishment response sent by the UE1, the method includes:

Sending a unicast connection establishment request carrying the access parameters of the UE2 to the UE 1; wherein the access parameter of the UE2 is to instruct the UE1 to determine whether to allow the UE2 to access the serving cell based on the access control information of the serving cell and the access parameter of the UE 2;

the unicast connection establishment response includes: a determination of whether to allow the UE2 access to the serving cell.

In an optional implementation manner of the eighth aspect, after the UE2 receives the unicast connection establishment response sent by the UE1, the method includes:

sending a second sidelink RRC message to the UE 1; wherein the second sidelink RRC message is used for requesting access control information;

receiving a first sidelink RRC message which is sent by the UE1 and carries the access control information of the serving cell;

In an embodiment of the present application, the second sidelink RRC message may include an access control information request identity or PLMN information of the UE 2.

Sending a third side link RRC message to the UE1 carrying access parameters for the UE 2; wherein the access parameter of the UE2 is to indicate that the UE1 determines whether to allow the UE2 to access the serving cell based on the access parameter of the UE2 and the access control information of the serving cell;

receiving a fourth side link RRC message carrying the determination result sent by the UE 1.

In an optional implementation manner of the eighth aspect, the access parameter of the UE2 includes: PLMN information of the UE 2;

In an optional implementation manner of the eighth aspect, the determining whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameter of the UE2 includes:

In an optional implementation manner of the eighth aspect, before the UE2 receives the unicast connection establishment response sent by the UE1, the method includes: sending PLMN information of the UE2 to the UE 1;

In an optional implementation manner of the eighth aspect, the sending PLMN information of the UE2 to the UE1 includes: sending a unicast connection establishment request carrying PLMN information of the UE2 to the UE 1.

In an optional implementation of the eighth aspect, the second sidelink RRC message includes PLMN information of the UE 2;

In an alternative embodiment of the eighth aspect, the method further comprises:

sending a unicast connection release to the UE1 or performing a step of reselecting a relay terminal when it is determined that the UE2 is prohibited from accessing the serving cell.

Wherein the unicast connection release is to release a sidelink unicast connection between the UE1 and the UE 2.

In an optional implementation manner of the eighth aspect, the release cause value in the unicast connection release is a barring access cell.

In an optional implementation manner of the eighth aspect, the access parameter of the UE2 includes: access type AC and access indication AI.

In a ninth aspect, an embodiment of the present application provides an access control method, applied to a UE2 side, including:

sending a unicast connection release to the UE1 when it is determined to prohibit the UE2 from accessing the serving cell of the UE 1; wherein the unicast connection release is to release a sidelink unicast connection between the UE2 and the UE 1.

In an optional implementation manner of the ninth aspect, the unicast connection establishment response comprises: access control information of the serving cell;

In an optional implementation manner of the ninth aspect, before the UE2 receives the unicast connection establishment response sent by the UE1, the method includes:

In an optional implementation manner of the ninth aspect, after the UE2 receives the unicast connection establishment response sent by the UE1, the method includes:

In an optional implementation manner of the ninth aspect, the access parameter of the UE2 includes: PLMN information of the UE 2;

In an optional implementation manner of the ninth aspect, the determining whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameter of the UE2 includes:

In an optional implementation manner of the ninth aspect, before the UE2 receives the unicast connection establishment response sent by the UE1, the method includes: sending PLMN information of the UE2 to the UE 1;

In an optional implementation manner of the ninth aspect, the sending PLMN information of the UE2 to the UE1 includes: sending a unicast connection establishment request carrying PLMN information of the UE2 to the UE 1.

In an optional embodiment of the ninth aspect, the second sidelink RRC message includes PLMN information of the UE 2;

In an alternative embodiment of the ninth aspect, the method further comprises:

upon determining to allow the UE2 to access the serving cell, sending a first RRC connection setup request to the UE 1;

wherein the first RRC connection setup request is for requesting establishment of an RRC connection between the UE2 and the RAN to which the cell belongs.

In an optional implementation manner of the ninth aspect, the release cause value in the unicast connection release message is a barring access cell.

In an optional implementation manner of the ninth aspect, after the UE2 receives the unicast connection establishment response sent by the UE1, the method further includes:

sending a first RRC connection setup request to the UE1 carrying access parameters for the UE 2; wherein the first RRC connection setup request is for requesting establishment of an RRC connection between the UE2 and a RAN to which the cell belongs; the access parameter of the UE2 is to instruct the UE1 to determine whether to allow the UE2 to access the serving cell based on the access control information for the serving cell and the access parameter of the UE 2;

Receiving a first RRC connection rejection sent by the UE 1; the first RRC connection rejection is sent by the UE1 when it is determined to prohibit the UE2 from accessing the serving cell.

In an optional implementation manner of the ninth aspect, the connection rejection reason value in the first RRC connection rejection is a barring access cell.

In an alternative embodiment of the ninth aspect, the method further comprises: the step of reselecting the relay terminal is performed.

In an optional implementation manner of the ninth aspect, the access parameter of the UE2 includes: access type AC and access indication AI.

In a tenth aspect, an embodiment of the present application provides an access control method, which is applied to a UE1 side,

a first terminal equipment UE1 receives a unicast connection establishment request sent by a second terminal equipment UE 2;

upon determining to allow the UE2 to access the serving cell of the UE1, sending a unicast connection establishment response to the UE 2;

In an optional implementation of the tenth aspect, the unicast connection establishment request comprises access parameters of the UE 2;

after the UE1 receives the unicast connection establishment request sent by the UE2, the method includes:

In an optional implementation manner of the tenth aspect, before the UE1 receives the unicast connection establishment request sent by the UE2, the method includes:

receiving access parameters of the UE2 sent by the UE 2;

In an optional embodiment of the tenth aspect, the access parameters of the UE2 comprise PLMN information of the UE 2;

the determining whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameters of the UE2 includes:

In an optional implementation manner of the tenth aspect, the receiving the access parameter of the UE2 sent by the UE2 includes:

receiving a second discovery request carrying access parameters of the UE2 sent by the UE 2.

In an alternative embodiment of the tenth aspect, the method further comprises:

receiving a first RRC connection establishment request sent by the UE 2;

sending the first RRC connection setup request to the RAN;

In an optional implementation manner of the tenth aspect, before the sending the first RRC connection setup request to the UE1, the method further includes:

sending a second RRC connection setup request to the RAN while the UE1 is in a non-connected state;

wherein the second RRC connection setup request is to request establishment of an RRC connection between the UE1 and the RAN.

In an optional implementation manner of the tenth aspect, the connection establishment cause value in the second RRC connection establishment request is: a relay, or a connection establishment cause value in the first RRC connection establishment request.

In an alternative embodiment of the tenth aspect, the method further comprises:

In an optional implementation manner of the tenth aspect, the connection establishment cause value in the second RRC connection establishment request is: a relay, or a cause value carried in the unicast connection establishment request to establish the RRC connection between the UE2 and the RAN.

In an alternative embodiment of the tenth aspect, the method further comprises:

sending a unicast connection rejection to the UE2 when it is determined to prohibit the UE2 from accessing the serving cell.

In an optional implementation manner of the tenth aspect, the connection rejection reason value in the unicast connection rejection is a barring access cell.

In an eleventh aspect, an embodiment of the present application provides an access control method, which is applied to a UE1 side, and includes:

the first terminal equipment UE1 receives a first RRC connection establishment request sent by the second terminal equipment UE 2; the first RRC connection setup request is to request establishment of an RRC connection between the UE2 and a RAN to which a serving cell of the UE1 belongs;

upon determining to allow the UE2 to access the serving cell, the UE1 sends the first RRC connection setup request to the RAN.

In an optional implementation manner of the eleventh aspect, the first RRC connection establishment request includes: access parameters of the UE 2; or, the UE1 receives the first RRC connection establishment request sent by the UE2, including: the UE1 receiving the first RRC connection setup request sent by the UE2 and access parameters of the UE 2;

After the UE1 receives the first RRC connection setup request sent by the UE2, comprising:

In an optional implementation manner of the eleventh aspect, before the UE1 receives the first RRC connection establishment request sent by the UE2, the method includes:

receiving access parameters of the UE2 sent by the UE 2;

In an optional embodiment of the eleventh aspect, the access parameters of the UE2 include PLMN information of the UE 2;

In an optional implementation manner of the eleventh aspect, the receiving the access parameter of the UE2 sent by the UE2 includes: receiving a third side link RRC message carrying the access parameters of the UE2 sent by the UE 2.

receiving a unicast connection establishment request sent by the UE 2;

sending a unicast connection establishment response to the UE 2;

In an optional implementation manner of the eleventh aspect, before the UE1 sends the first RRC connection establishment request to the RAN to which the serving cell belongs, the method includes:

sending a second RRC connection setup request to the RAN while the UE1 is in a non-connected state; wherein the second RRC connection setup request is to request establishment of an RRC connection between the UE1 and the RAN;

and receiving second RRC connection establishment sent by the RAN.

In an optional implementation manner of the eleventh aspect, the connection establishment cause value in the second RRC connection establishment request is: a relay, or a connection establishment cause value in the first RRC connection establishment request.

In an optional embodiment of the eleventh aspect, the method further comprises:

sending a first RRC connection rejection to the UE2 when it is determined to prohibit the UE2 from accessing the serving cell.

In an optional implementation manner of the eleventh aspect, the connection rejection reason value in the first RRC connection rejection is a barring access cell.

In a twelfth aspect, an embodiment of the present application provides an access control method, which is applied to a UE1 side, and the method includes:

the first terminal equipment UE1 receives the connection indication message sent by the second terminal equipment UE 2; wherein the connection indication message is for requesting establishment of a communication connection between the UE1 and the UE2 or for requesting establishment of a communication connection between the UE2 and a RAN to which a serving cell of the UE1 belongs;

sending a second RRC connection establishment request to the RAN when the UE1 is in a non-connected state, wherein the second RRC connection establishment request is used for requesting establishment of an RRC connection between the UE1 and the RAN.

In an optional implementation manner of the twelfth aspect, the connection indication message is a unicast connection establishment request; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2.

In an optional implementation manner of the twelfth aspect, the connection indication message is a first RRC connection establishment request, where the first RRC connection establishment request is used to request establishment of an RRC connection between the UE2 and the RAN.

In an optional embodiment of the twelfth aspect, the method further comprises:

sending a unicast connection establishment response to the UE 2;

receiving a first RRC connection establishment request sent by the UE2, wherein the first RRC connection establishment request is used for requesting to establish an RRC connection between the UE2 and the RAN.

In an optional embodiment of the twelfth aspect, the method further comprises:

sending the first RRC connection setup request to the RAN;

receiving first RRC connection establishment sent by the RAN;

sending the first RRC connection setup to the UE 2;

receiving a first RRC connection setup completion sent by the UE 2;

sending the first RRC connection setup complete to the RAN.

In an optional embodiment of the twelfth aspect, the method further comprises:

receiving a second RRC connection rejection sent by the RAN;

sending a unicast connection rejection to the UE 2.

In an optional embodiment of the twelfth aspect, the method further comprises:

receiving a second RRC connection rejection sent by the RAN;

sending a unicast connection release to the UE 2.

In an optional implementation manner of the twelfth aspect, after the sending the second RRC connection establishment request to the RAN to which the serving cell of the UE1 belongs, the method further includes:

Receiving a second RRC connection establishment sent by the RAN;

sending a second RRC connection setup complete to the RAN.

In an optional implementation manner of the twelfth aspect, the connection rejection reason value of the second RRC connection rejection is that relaying is not supported.

In an optional implementation manner of the twelfth aspect, the rejection reason value of the unicast connection rejection is that relaying is not supported.

In an optional implementation manner of the twelfth aspect, the connection release reason value of the unicast connection release is that relaying is not supported.

In an optional embodiment of the twelfth aspect, the connection indication message comprises access parameters of the UE 2;

after the first terminal equipment UE1 receives the connection indication message sent by the second terminal equipment UE2, the method comprises: determining whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameters of the UE 2;

the sending, when the UE1 is in a non-connected state, a second RRC connection setup request to a RAN to which a serving cell of the UE1 belongs, comprising: sending the second RRC connection setup request to the RAN upon determining that the UE2 is allowed to access the serving cell and that the UE1 is in a non-connected state.

In an optional embodiment of the twelfth aspect, the access parameters of the UE2 comprise an access type, AC, and an access indication, AI, of the UE 2.

In a thirteenth aspect, the present application further provides an access control method, applied to a UE1 side, including:

a first terminal equipment UE1 receives a unicast connection establishment request sent by a second terminal equipment UE 2; the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2;

sending a second RRC connection setup request to a RAN to which a serving cell of the UE1 belongs; the second RRC connection establishment request is for requesting establishment of an RRC connection between the UE1 and the RAN.

In an optional implementation manner of the thirteenth aspect, before the UE1 sends a second RRC connection establishment request to the RAN to which the serving cell belongs when the UE1 is in a non-connected state, the method includes:

sending access control information for the serving cell to the UE 2; wherein the access control information is used to instruct the UE1 to determine whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameter of the UE2, and the UE2 sends the unicast connection establishment request to the UE1 when determining to allow the UE2 to access the serving cell of the UE 1.

receiving access parameters of the UE2 sent by the UE 2; determining whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameters of the UE 2;

the sending, by the UE1, a second RRC connection setup request to the RAN to which the serving cell belongs while the UE1 is in a non-connected state includes:

upon determining to allow the UE2 to access the serving cell, the UE1 sends a second RRC connection setup request to the RAN to which the serving cell belongs.

In an optional embodiment of the thirteenth aspect, the method further comprises:

sending a unicast connection establishment response to the UE 2;

receiving a first RRC connection establishment request sent by the UE 2; the first RRC connection establishment request is for requesting establishment of an RRC connection between the UE1 and a RAN to which the cell belongs;

sending the first RRC connection setup request to the RAN.

Receiving a second RRC establishment message sent by the RAN;

sending a unicast connection establishment response to the UE 2.

receiving a second RRC connection rejection sent by the RAN, the second RRC connection rejection indicating a rejection of establishing an RRC connection between the UE1 and the RAN;

sending a unicast connection rejection to the UE 2.

In an optional implementation manner of the thirteenth aspect, the reject cause value in the unicast connection rejection is that relaying is not supported.

In a fourteenth aspect, an embodiment of the present application provides an access control method, which is applied to a UE1 side, and includes:

the first terminal equipment UE1 receives a first RRC connection establishment request sent by the second terminal equipment UE 2; wherein the first RRC connection setup request is to request establishment of an RRC connection between the UE2 and a RAN to which a serving cell of the UE1 belongs;

Wherein the non-connection state is an idle state or a deactivation state; when the UE1 is in an idle state, the second RRC connection establishment request is an RRC connection establishment request rrcsetupreq message; when the UE1 is in the deactivated state, the second RRC connection establishment request is an RRC connection resume request RRCResumeRequest message.

In an optional implementation manner of the fourteenth aspect, the sending a second RRC connection setup request to the RAN when the UE1 is in a non-connected state includes:

sending the second RRC connection establishment request to the RAN when the UE1 is in a non-connected state and it is determined that the UE2 is allowed to access a serving cell of the UE 1.

In an optional implementation manner of the fourteenth aspect, the first RRC connection setup request includes: access parameters of the UE 2;

In an optional implementation manner of the fourteenth aspect, before the UE1 receives the first RRC connection establishment request sent by the UE2, the method includes:

receiving access parameters of the UE2 sent by the UE 2;

Receiving access parameters of the UE2 sent by the UE 2;

determining whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameters of the UE 2;

sending the determination to the UE 2.

sending access control information for the serving cell to the UE 2;

wherein the access control information for the serving cell is to instruct the UE2 to determine whether to allow the UE2 to access the serving cell according to the access control information for the serving cell and the access parameters of the UE 2.

In an optional embodiment of the fourteenth aspect, the access parameters of the UE2 include PLMN information of the UE 2;

In an optional implementation manner of the fourteenth aspect, before sending the access control information of the serving cell to the UE2, the method includes: receiving PLMN information of the UE2 sent by the UE 2;

the sending of the access control information of the serving cell to the UE2 includes: sending, to the UE2, access control information of the serving cell corresponding to PLMN information of the UE 2.

In an optional implementation manner of the fourteenth aspect, the sending, to the UE2, the access control information of the serving cell includes:

and sending a unicast connection establishment response carrying the access control information of the serving cell to the UE 2.

In an optional implementation manner of the fourteenth aspect, the receiving PLMN information of the UE2 sent by the UE2 includes:

receiving a second sidelink RRC message sent by the UE2, the second sidelink RRC message including access control information of the serving cell corresponding to PLMN information of the UE 2;

the sending of the access control information of the serving cell to the UE2 includes:

sending a first sidelink RRC message to the UE2, the first sidelink RRC message including access control information of the serving cell corresponding to PLMN information of the UE 2.

In an optional implementation manner of the fourteenth aspect, the receiving the access parameter of the UE2 sent by the UE2 includes: receiving a unicast connection establishment request carrying the access parameters of the UE2 sent by the UE 2;

the sending of the determination to the UE2 includes:

In an optional implementation manner of the fourteenth aspect, the receiving the access parameter of the UE2 sent by the UE2 includes: receiving a third side link RRC message carrying the access parameters of the UE2 and sent by the UE 2;

the sending of the determination to the UE2 includes:

sending a fourth side link RRC message to the UE2 carrying the determination.

In an optional implementation manner of the fourteenth aspect, before the UE1 receives the RRC connection establishment request sent by the UE2, the method includes:

receiving a unicast connection establishment request sent by the UE 2;

sending a unicast connection establishment response to the UE 2;

In an optional implementation manner of the fourteenth aspect, the connection establishment cause value in the second RRC connection establishment request is: a relay, or a connection establishment cause value in the first RRC connection establishment request.

In an optional implementation manner of the fourteenth aspect, after sending the second RRC connection establishment request to the RAN, the method further includes:

receiving second RRC connection establishment sent by the RAN;

sending a second RRC connection setup completion to the RAN;

sending the first RRC connection setup request to the RAN.

In an optional implementation manner of the fourteenth aspect, after the sending the first RRC connection setup request to the RAN, the method further includes:

receiving first RRC connection establishment sent by the RAN;

sending the first RRC connection setup to the UE 2;

receiving a first RRC connection setup completion sent by the UE 2;

sending the first RRC connection setup complete to the RAN.

In a fifteenth aspect, the present application provides an access control method, applied to a UE1 side, including:

a first terminal equipment UE1 receives a unicast connection establishment request sent by a second terminal equipment UE 2; the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2; the unicast connection establishment request is sent by the UE2 when it is determined to allow the UE2 access to the serving cell of the UE 1;

The UE1 sends a unicast connection establishment response to the UE 2.

In an optional implementation manner of the fifteenth aspect, before the UE1 receives the unicast connection establishment request sent by the UE2, the method includes:

receiving access parameters of the UE2 sent by the UE 2;

sending the determination to the UE 2.

In an optional implementation manner of the fifteenth aspect, before the UE1 receives the unicast connection establishment request sent by the UE2, the method includes: sending access control information for the serving cell to the UE 2;

the determination to allow the UE2 to access the serving cell is based on the access control information for the serving cell and the access parameters of the UE 2.

In an optional embodiment of the fifteenth aspect, the access parameters of the UE2 include a PLMN of the UE 2;

In an optional implementation manner of the fifteenth aspect, the sending the access control information of the serving cell to the UE2 includes: sending one or more access control information for the serving cell to the UE 2;

the determination result of allowing the UE2 to access the serving cell is determined according to the access control information of the serving cell corresponding to the PLMN information of the UE2 and the access parameter of the UE 2.

In an optional implementation manner of the fifteenth aspect, before sending the access control information of the serving cell to the UE2, the method includes: receiving PLMN information of the UE2 sent by the UE 2;

In an optional implementation manner of the fifteenth aspect, the sending the access control information of the serving cell to the UE2 includes:

sending a first discovery message or a second discovery response to the UE2 carrying access control information for the serving cell.

In an optional implementation manner of the fifteenth aspect, the receiving PLMN information of the UE2 sent by the UE2 includes: receiving a second discovery request carrying PLMN information of the UE2 sent by the UE 2;

the sending of the access control information of the serving cell to the UE2 includes: sending a second discovery response to the UE2 carrying access control information for the serving cell.

In an optional implementation manner of the fifteenth aspect, the receiving the access parameter of the UE2 sent by the UE2 includes:

receiving a discovery request carrying access parameters of the UE2 sent by the UE 2;

the sending of the determination to the UE2 includes:

sending a discovery response carrying the determination to the UE 2.

receiving a second discovery response carrying the access parameters of the UE2 sent by the UE 2;

the sending of the determination to the UE2 includes:

sending an indication message carrying the determination result to the UE 2.

In the embodiment of the present application, the indication message is an enable indication or a disable indication.

In an optional implementation of the fifteenth aspect, after the UE1 sends a unicast connection establishment response to the UE2, the method further comprises:

receiving an RRC connection establishment request sent by the UE 2; the RRC connection establishment request is for requesting establishment of an RRC connection between the UE2 and a RAN to which the serving cell belongs;

sending the RRC connection setup request to the RAN.

receiving a first RRC connection establishment request sent by the UE 2; the first RRC connection establishment request is for requesting establishment of an RRC connection between the UE2 and a RAN to which the serving cell belongs;

sending a second RRC connection setup request to the RAN while the UE1 is in a non-connected state; the second RRC connection establishment request is for requesting establishment of an RRC connection between the UE1 and the RAN.

In an optional implementation manner of the fifteenth aspect, the connection establishment cause value in the second RRC connection establishment request is: a relay, or a connection establishment cause value in the first RRC connection establishment request.

In an optional implementation manner of the fifteenth aspect, after the sending the second RRC connection establishment request to the RAN, the method further includes:

receiving a second RRC connection message sent by the RAN;

sending the first RRC connection setup request to the RAN.

In this embodiment of the present application, before the sending the first RRC connection establishment request to the RAN, the method further includes: sending a second RRC connection setup complete message to the RAN.

In an optional implementation manner of the fifteenth aspect, after the sending the first RRC connection establishment request to the RAN, the method further includes:

receiving a first RRC connection establishment message sent by the RAN;

sending the first RRC connection setup message to the UE 2;

receiving a first RRC connection setup complete message sent by the UE 2;

sending the first RRC connection setup complete message to the RAN.

In a sixteenth aspect, the present application provides an access control method, applicable to a UE1, including:

a first terminal equipment UE1 receives an RRC connection establishment request sent by a second terminal equipment UE 2; the RRC connection establishment request is sent by the UE2 when it is determined to allow the UE2 access to a serving cell of the UE 1;

The UE1 sending the RRC connection setup request to the RAN to which the serving cell belongs;

wherein the RRC connection establishment request is for requesting establishment of an RRC connection between the UE2 and the RAN.

In an optional implementation manner of the sixteenth aspect, before the UE1 receives the RRC connection establishment request sent by the UE2, the method includes:

receiving access parameters of the UE2 sent by the UE 2;

sending the determination to the UE 2.

In an optional implementation manner of the sixteenth aspect, before the UE1 receives the RRC connection establishment request sent by the UE2, the method includes: sending access control information for the serving cell to the UE 2;

In an optional embodiment of the sixteenth aspect, the access parameters of the UE2 comprise a PLMN of the UE 2;

In an optional implementation manner of the sixteenth aspect, the sending the access control information of the serving cell to the UE2 includes: sending one or more access control information for the serving cell to the UE 2; any one of the access control information comprises corresponding PLMN information;

the determination to allow the UE2 to access the serving cell is determined according to the access control information of the serving cell and the access parameters of the UE2 whose corresponding PLMN information is the same as the PLMN information of the UE 2.

In an optional implementation manner of the sixteenth aspect, before sending the access control information of the serving cell to the UE2, the method includes: receiving PLMN information of the UE2 sent by the UE 2;

In an optional implementation of the sixteenth aspect, the sending PLMN information for the UE2 to the UE1 includes: sending a unicast connection establishment request carrying PLMN information of the UE2 to the UE 1.

In an optional implementation manner of the sixteenth aspect, the sending the access control information of the serving cell to the UE2 includes:

In an optional implementation manner of the sixteenth aspect, the receiving the access parameter of the UE2 sent by the UE2 includes: receiving a unicast connection establishment request carrying the access parameters of the UE2 sent by the UE 2;

the sending of the determination to the UE2 includes:

In an optional implementation manner of the sixteenth aspect, the receiving the access parameter of the UE2 sent by the UE2 includes: receiving a second side link RRC message carrying access parameters of the UE2 sent by the UE 2;

the sending of the determination to the UE2 includes:

Sending a third sidelink RRC message carrying the determination to the UE 2.

receiving a unicast connection establishment request sent by the UE 2;

sending a unicast connection establishment response to the UE 2;

In a seventeenth aspect, the present application provides an access control method, applied to a UE1 side, including:

the UE1 receives a unicast connection release sent by a UE2, the unicast connection release being used for releasing a sidelink unicast connection between the UE1 and the UE2, the unicast connection release being sent by the UE2 when the UE2 is determined to be prohibited from accessing the serving cell;

the UE1 releases the unicast connection.

In an eighteenth aspect, the present application provides an access control method, applied to a UE2 side, including:

the second terminal device UE2 sends a unicast connection establishment request to the first terminal device UE 1; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2;

The UE2 receives a unicast connection establishment response sent by the UE1, the unicast connection establishment response being sent by the UE1 when it is determined that the UE2 is allowed to access the serving cell of the UE 1.

In an optional embodiment of the eighteenth aspect, the determination that the UE2 is allowed to access the serving cell of the UE1 is derived from access control information of the serving cell and access parameters of the UE 2;

before the UE2 sends a unicast connection establishment request to the UE1, comprising:

the UE2 sends the access parameters of the UE2 to the UE 1.

the unicast connection establishment request includes access parameters for the UE 2.

In an optional embodiment of the eighteenth aspect, the access parameters of the UE2 comprise PLMN information of the UE 2;

wherein the PLMN information of the UE2 is used for the UE1 to obtain access control information of the serving cell corresponding to the PLMN information of the UE 2; the determination that the UE2 is allowed to access the serving cell of the UE1 is obtained according to the obtained access control information of the serving cell and the access parameters of the UE 2.

In an optional implementation of the eighteenth aspect, the UE2 sends the access parameters of the UE2 to the UE1, including:

the UE2 sends a discovery request or discovery response to the UE1 carrying the access parameters of the UE 2.

In an optional embodiment of the eighteenth aspect, the method further comprises:

sending a first RRC connection setup request to the UE 1;

receiving a first RRC connection setup sent by the UE 1;

In a nineteenth aspect, an embodiment of the present application provides an access control method, which is applied to a UE1 side, and the method includes:

the second terminal device UE2 sends a unicast connection establishment request to the first terminal device UE 1; the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE2 and the UE 1;

receiving a unicast connection release sent by the UE 1; the unicast connection release is sent by the UE1 when it is determined to prohibit the UE2 from accessing the serving cell of the UE 1.

In a twentieth aspect, an embodiment of the present application provides an access control method, which is applied to a UE2 side, and the method includes:

The second terminal device UE2 sends an RRC connection setup request to the first terminal device UE 1; the RRC connection establishment request is for requesting establishment of an RRC connection between the UE2 and a RAN to which a serving cell of the UE1 belongs;

receiving the RRC connection establishment sent by the UE 1; the RRC connection establishment is sent by the UE1 when it is determined to allow the UE2 to access the serving cell.

In a twenty-first aspect, an embodiment of the present application provides an access control method, which is applied to a UE2 side, and the method includes:

receiving an RRC connection rejection sent by the UE 1; the RRC connection rejection is sent by the UE1 when it is determined to prohibit the UE2 from accessing the serving cell.

Wherein, after the receiving the RRC connection rejection sent by the UE1, the method includes:

receiving a unicast connection release sent by the UE 1; the unicast connection release is sent by the UE1 when it is determined to prohibit the UE2 from accessing the serving cell.

In the embodiment of the present application, the radio access network RAN receives a second RRC connection establishment request sent by the first terminal device UE 1; wherein the second RRC connection setup request is for requesting establishment of a connection setup request between the UE1 and the RAN;

The RAN sending a second RRC connection setup message to the UE 1;

the RAN receiving a first RRC connection setup request sent by the UE 1; wherein the first RRC connection setup request is for requesting establishment of a connection setup request between the UE2 and the RAN.

In an optional implementation manner, the connection establishment cause value in the second RRC connection establishment request is a relay, or the connection establishment cause value in the first RRC connection establishment request.

In an alternative embodiment, the second RRC connection establishment request is sent by the UE1 when the first RRC connection establishment request sent by the UE2 is received and the UE1 is in an idle state or a deactivated state;

alternatively, the first and second electrodes may be,

the second RRC connection establishment request is sent by the UE1 when a unicast connection establishment request sent by the UE2 is received and the UE1 is in an idle state or a deactivated state; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2.

In a twenty-second aspect, an embodiment of the present application further provides an access control apparatus, including:

an obtaining module, configured to obtain access control information of a serving cell of a first terminal UE 1;

A sending module, configured to send access control information of the serving cell to the UE 2; wherein the access control information of the serving cell is used for a second terminal equipment UE2 to determine whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameter of the UE 2.

In an alternative embodiment, the apparatus further comprises: a receiving module, configured to receive PLMN information of the UE2 sent by the UE2 before the UE1 sends access control information of a serving cell of the UE1 to the UE 2; the sending module is specifically configured to send, to the UE2, access control information of the serving cell corresponding to PLMN information of the UE 2.

In an optional implementation manner, the sending module is specifically configured to send, to the UE2, a first discovery message carrying access control information of the serving cell.

In an optional implementation manner, the receiving module is specifically configured to receive a second discovery request carrying PLMN information of the UE2 and sent by the UE 2.

In an optional implementation manner, the sending module is specifically configured to send, to the UE2, a second discovery response carrying the access control information of the serving cell.

In an alternative embodiment, the apparatus further includes means for receiving a unicast connection establishment request sent by the UE2 after the UE1 sends access control information of a serving cell of the UE1 to the UE 2; the sending module is further configured to send a unicast connection establishment response to the UE 2; wherein the unicast connection establishment request is transmitted by the UE2 when it is determined to allow the UE2 to access the serving cell; the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2.

In an optional implementation manner, the receiving module is further configured to receive a first RRC connection establishment request sent by the UE 2; wherein the first RRC connection setup request is for requesting establishment of an RRC connection between the UE2 and a RAN to which the serving cell belongs;

the sending module is further configured to send the first RRC connection establishment request to the RAN.

In an optional embodiment, the sending module is further configured to send a second RRC connection establishment request to the RAN while the UE1 is in a non-connected state before the sending of the first RRC connection establishment request to the RAN; wherein the second RRC connection setup request is to request establishment of an RRC connection between the UE1 and the RAN.

In an optional implementation manner, the connection establishment cause value in the second RRC connection establishment request is: a relay, or a connection establishment cause value in the first RRC connection establishment request.

In an optional embodiment, the receiving module is further configured to receive a unicast connection establishment request sent by the UE2 after the UE1 sends access control information of a serving cell of the UE1 to the UE 2; the sending module is further configured to send a second RRC connection establishment request to the RAN when the UE1 is in a non-connected state; wherein the second RRC connection setup request is to request establishment of an RRC connection between the UE1 and the RAN.

In an optional implementation manner, the receiving module is further configured to receive a second RRC connection rejection sent by the RAN after the sending of the second RRC connection establishment request to the RAN; the sending module is further configured to send a unicast connection rejection to the UE 2.

In an alternative embodiment, the connection rejection cause value in the unicast connection rejection is that relaying is not supported.

In an optional implementation manner, the connection rejection reason value in the second RRC connection rejection is that relay is not supported.

In an optional embodiment, the access parameters of the UE2 include: access type AC and access indication AI.

In a twenty-third aspect, an embodiment of the present application further provides an access control apparatus, including:

a receiving module, configured to receive a discovery procedure message sent by a first terminal equipment UE 1;

a sending module for sending a unicast connection establishment request to the UE1 when it is determined that the second terminal device UE2 is allowed to access the serving cell of the UE 1; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2.

In an alternative embodiment, the apparatus further comprises: a processing module; the discovery process message includes: access control information of the serving cell; the processing module is configured to determine whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameter of the UE 2.

In an optional implementation manner, the processing module is specifically configured to acquire access control information of the serving cell corresponding to PLMN information of the UE 2; and determining whether to allow the UE2 to access the serving cell according to the acquired access control information and the access parameter of the UE 2.

In an optional embodiment, the sending module is further configured to send PLMN information of the UE2 to the UE1 before the receiving module receives the discovery procedure message sent by the UE 1; the access control information of the serving cell includes: access control information of the serving cell corresponding to PLMN information of the UE 2.

In an alternative embodiment, the discovery procedure message is a first discovery message sent by the UE1 to the UE 2.

In an alternative embodiment, the sending PLMN information for the UE2 to the UE1 includes: sending a second discovery request to the UE1 carrying PLMN information of the UE 2; the discovery process message is a second discovery response carrying access control information of the serving cell.

In an optional embodiment, the receiving module is further configured to receive a unicast connection establishment response sent by the UE1 after the sending of the unicast connection establishment request to the UE 1; the sending module is further configured to send a first RRC connection establishment request to the UE1, where the first RRC connection establishment request is used to request establishment of an RRC connection between the UE2 and the RAN to which the serving cell belongs.

In an alternative embodiment, the unicast connection establishment request includes a connection establishment cause value for an RRC connection between the UE2 and the RAN; the processing module is further configured to obtain a connection establishment cause value of an RRC connection between the UE2 and the RAN before the sending of the unicast connection establishment request to the UE 1.

In an alternative embodiment, the processing module is further configured to perform the step of reselecting the relay terminal when it is determined that the UE2 is prohibited from accessing the serving cell.

In another aspect, the present embodiment also provides a communication apparatus on a terminal device side, where the apparatus may be the first terminal device UE1, or may be a chip within the UE 1. The apparatus has the function of implementing any of the first, fourth, fifth, tenth through seventeenth aspects described above relating to the UE 1. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units corresponding to the above functions.

In one possible implementation, when the apparatus is a UE1, the UE1 includes: a processor and a transceiver, the processor configured to support the UE1 to perform corresponding functions in the above-described methods. The transceiver is used to support communication between the UE1 and the UE2, sending information or instructions involved in the above-described methods to the UE 2. Optionally, the UE1 may also include a memory, coupled to the processor, that retains program instructions and data necessary for the UE 1.

In one possible implementation, the apparatus includes: a processor, baseband circuitry, radio frequency circuitry, and an antenna. The processor is configured to implement control of functions of each circuit part, and the baseband circuit is configured to generate various types of signaling and messages, such as a first discovery message, a second discovery response, a unicast connection establishment response, a side link RRC message, and the like, and send the signaling and messages to the UE2 via the antenna after performing analog conversion, filtering, amplification, up-conversion, and the like via the radio frequency circuit. Optionally, the apparatus may also include a memory that retains program instructions and data necessary for the UE 1.

In one possible implementation, the apparatus may include a processor that may be configured to instruct or an operating system to implement the control of the UE1 functions and a modem that may encapsulate, codec, modem, equalize, etc. data by protocol to generate radio frames to support the UE1 to perform the respective functions of any of the first, fourth, fifth, tenth to seventeenth aspects described above.

In one possible implementation, when the apparatus is a chip within the UE1, the chip includes: the processing module may be, for example, a processor, and the processing module may be, for example, the processor, the processing module is configured to generate various messages and signaling, and perform processing such as encoding, modulating, amplifying, and the like after encapsulating the various messages according to a protocol, the processor may also be configured to demodulate, decode, and decapsulate to obtain signaling and messages, and the transceiving module may be, for example, an input/output interface, a pin, a circuit, and the like on the chip. The processing module may execute computer-executable instructions stored by the memory unit to enable the UE1 to perform corresponding functions in the above-described methods. Alternatively, the storage unit may be a storage unit in the chip, such as a register, a cache, and the like, and the storage unit may also be a storage unit located outside the chip in the UE1, such as a read-only memory (ROM) or another type of static storage device that can store static information and instructions, a Random Access Memory (RAM), and the like.

In one possible implementation, the apparatus includes a processor, which is configured to couple with a memory, read instructions in the memory, and execute the method according to any one of the first, fourth, fifth, tenth to seventeenth aspects. The memory may be located within the processor or external to the processor. In an example, the memory is used for storing a computer program, and the processor is used for calling and running the computer program from the memory, so that the communication device performs the method of any one of the first aspect, the fourth aspect, the fifth aspect, the tenth aspect to the seventeenth aspect and various possible implementations thereof.

In another aspect, the present embodiment also provides a communication apparatus on the terminal device side, where the apparatus may be the second terminal device UE2, or may be a chip within the UE 2. The apparatus has the functionality to implement any of the second, third, sixth to eighth to twenty aspects described above relating to the UE 2. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units corresponding to the above functions.

In one possible implementation, when the apparatus is a UE2, the UE2 includes: a processor and a transceiver, the processor configured to support the UE2 to perform corresponding functions in the above-described methods. The transceiver is used to support communication between the UE2 and the UE1, sending information or instructions involved in the above-described methods to the UE 1. Optionally, the UE2 may also include a memory, coupled to the processor, that retains program instructions and data necessary for the UE 2.

In one possible implementation, the apparatus includes: a processor, baseband circuitry, radio frequency circuitry, and an antenna. The processor is configured to implement control of functions of each circuit part, and the baseband circuit is configured to generate various signaling and messages, such as a first discovery request, a unicast connection establishment request, a sidelink RRC message, a first RRC connection establishment request, and other messages, perform analog conversion, filtering, amplification, up-conversion, and other processing by the radio frequency circuit, and then send the processed messages to the UE1 via the antenna. Optionally, the apparatus may also include a memory that retains program instructions and data necessary for the UE 2.

In one possible implementation, the apparatus may include a processor that may be configured to instruct or an operating system to implement the control of the UE2 functionality, and a modem that may encapsulate, codec, modem, equalize, etc. data by protocol to generate radio frames to support the UE2 to perform the respective functions of any of the second, third, sixth-through-third, eighteenth-through-twentieth aspects described above.

In one possible implementation, when the apparatus is a chip within the UE2, the chip includes: the processing module may be, for example, a processor, and the processing module may be, for example, the processor, the processing module is configured to generate various messages and signaling, and perform processing such as encoding, modulating, amplifying, and the like after encapsulating the various messages according to a protocol, the processor may also be configured to demodulate, decode, and decapsulate to obtain signaling and messages, and the transceiving module may be, for example, an input/output interface, a pin, a circuit, and the like on the chip. The processing module may execute computer-executable instructions stored by the memory unit to enable the UE2 to perform corresponding functions in the above-described methods. Alternatively, the storage unit may be a storage unit in the chip, such as a register, a cache, and the like, and the storage unit may also be a storage unit located outside the chip in the UE2, such as a read-only memory (ROM) or another type of static storage device that can store static information and instructions, a Random Access Memory (RAM), and the like.

In one possible implementation, the apparatus includes a processor, which is configured to couple with a memory, read instructions in the memory, and execute the method described in any one of the second, third, sixth to fifth, and eighteenth to twentieth aspects above according to the instructions. The memory may be located internal to the processor, may be located external to the processor, or may be located external to the device.

In yet another aspect, the present application provides a computer-readable storage medium having instructions stored therein, the instructions executable by one or more processors on a processing circuit. When run on a computer, cause the computer to perform the method of any of the first to twenty-first aspects described above, or any possible implementation thereof.

In a further aspect, there is provided a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of any of the first to twenty-first aspects above, or any possible implementation thereof.

In a further aspect, the present application provides a chip system comprising a processor for supporting performing the method of any one of the first to twentieth aspects above or any possible implementation thereof, such as generating or processing data and/or information referred to in the above aspects. In one possible design, the system-on-chip further includes a memory for storing program instructions and data necessary for the data transmission device. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

In yet another aspect, an embodiment of the present application provides a communication system, where the system includes the base station, the first terminal device, and the second terminal device in the above aspect.

Drawings

Fig. 1A is a schematic architecture diagram of a communication network according to an embodiment of the present application;

fig. 1B is a schematic diagram of a processing flow of an access control method according to an embodiment of the present application;

fig. 1C is a schematic flowchart of a UE1 obtaining access control information of a serving cell from a RAN in an access control method according to an embodiment of the present application;

fig. 1D is a schematic flowchart of a UE2 accessing a cell supported by a RAN through a UE1 according to an embodiment of the present disclosure;

fig. 1E is a schematic diagram of a processing flow of the UE1 entering a connected state from a non-connected state according to an embodiment of the present application;

fig. 2A is a first schematic flowchart of a process of obtaining a determination result in an access control method according to an embodiment of the present application;

fig. 2B is a schematic flow chart illustrating a second process for obtaining a determination result in the access control method according to the embodiment of the present application;

fig. 2C is a schematic flow chart illustrating a third step of obtaining a determination result in the access control method according to the embodiment of the present application;

fig. 3A is a first schematic processing flow diagram after a determination result is obtained in the access control method according to the embodiment of the present application;

Fig. 3B is a schematic diagram of a processing flow after a determination result is obtained in the access control method according to the embodiment of the present application;

fig. 3C is a schematic view illustrating a processing flow after a determination result is obtained in the access control method according to the embodiment of the present application;

fig. 3D is a schematic view illustrating a processing flow after a determination result is obtained in the access control method according to the embodiment of the present application;

fig. 3E is a schematic diagram of a processing flow after a determination result is obtained in the access control method according to the embodiment of the present application;

fig. 3F is a schematic view illustrating a processing flow after a determination result is obtained in the access control method according to the embodiment of the present application;

fig. 3G is a schematic diagram illustrating a processing flow after a determination result is obtained in the access control method according to the embodiment of the present application;

fig. 3H is an eighth schematic processing flow diagram after a determination result is obtained in the access control method according to the embodiment of the present application;

fig. 4A is a first schematic processing flow diagram of an access control method according to an embodiment of the present application;

fig. 4B is a schematic processing flow diagram of an access control method according to an embodiment of the present application;

fig. 4C is a schematic processing flow diagram of a third access control method according to an embodiment of the present application;

fig. 4D is a schematic processing flow diagram of an access control method according to the embodiment of the present application;

Fig. 4E is a schematic processing flow diagram of an access control method according to an embodiment of the present application;

fig. 5 is a first schematic structural diagram of an access control apparatus according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of an access control apparatus according to an embodiment of the present application;

fig. 7 is a schematic structural diagram three of an access control apparatus according to an embodiment of the present application;

fig. 8 is a first schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

Detailed Description

The terminology used in the description of the embodiments section of the present application is for the purpose of describing particular embodiments of the present application only and is not intended to be limiting of the present application.

Example one

First, an application scenario of the access control method provided in the present application is exemplarily described below.

Fig. 1A is a schematic architecture diagram of a communication network according to an embodiment of the present application. As shown in fig. 1A, the communication network comprises a radio access network RAN and a terminal device UE. Where the RAN may be one or more base stations. Illustratively, the base station may be an LTE base station or an NR base station. The RAN supports one or more cells, and the cell to which the UE currently accesses is a serving cell of the UE. After the UE accesses the cell, the state of the UE in the current cell may be a connected state, an idle state, or a deactivated state. And when the UE is in a connected state, the RRC connection is established between the UE and the RAN.

In the embodiment of the present application, a remote terminal device (remote UE) located at a cell edge or having a poor signal may access the RAN through a relay UE (relay UE) that has already accessed the cell. The remote terminal and the relay terminal can exchange messages through a sidelink (sidelink). The interface between the remote terminal and the relay terminal may be referred to as a PC5 interface.

The access control method provided in the embodiment of the present application is described below by taking the first terminal device UE1 as a relay UE, the second terminal device UE2 as a remote UE, and the UE2 accesses the serving cell of the UE1 through the UE 1. The method provided in the embodiment of the present application may also be applied to a scenario where the UE2 accesses other cells supported by the RAN through the UE1, which is not limited in the embodiment of the present application.

In the embodiment of the present application, whether to allow the UE2 to access the serving cell of the UE1 may be determined according to the access control information of the serving cell of the UE1 and the access parameter of the UE 2; thereafter, the permission processing flow or the prohibition processing flow is executed according to the determination result. Illustratively, the UE2 may obtain access parameters of the UE2 from itself when detecting that itself needs to initiate access. For example, the access parameters may include an access type AC and an access indication AI for the UE 2. The access control information of the cell may include a policy whether access is allowed or not corresponding to a combination of AC and AI. In this embodiment, the access control information of the cell may further include a policy of whether to allow access configured for PLMN information of the terminal device.

Fig. 1B is a schematic diagram of a processing flow of an access control method according to an embodiment of the present application. Note that, the execution subject involved in the processing flow may be UE1 or UE 2. As shown in fig. 1B, the process may include:

s1001, access control information of a serving cell is acquired.

Wherein, the execution subject of the step can be UE1 or UE 2. In an example, the UE1 may obtain access control information for a serving cell from a RAN. In another example, after the UE1 acquires the access control information for the serving cell from the RAN, the UE2 may acquire the access control information for the serving cell from the UE 1. It should be noted that fig. 1C is a schematic flowchart illustrating a process that a UE1 acquires access control information of a serving cell from a RAN in an access control method according to an embodiment of the present application. As can be seen in fig. 1C, the process of the UE1 obtaining access control information of the serving cell from the RAN may include: s1101, the RAN sends access control information of the cell to the UE 1. S1102, the UE1 obtains access control information of the serving cell. Illustratively, the RAN may broadcast access control information for one or more cells supported by the RAN in the respective cells via a cell system message SIB. The UE1 may store access control information for a serving cell.

In the embodiment of the present application, there are various embodiments of the access control information of the cell.

In an optional embodiment, the access control information of the cell may include: and the access strategy corresponds to the combination of the access type AC and the access identifier AI. The access policy may be to allow access or to prohibit access.

For example, the RAN may broadcast access control information for cells 0001, 0002, 0003 supported by the RAN in a system message. In one example, access control information 1 for cell 0001 includes the following information: AC1, AI1, the corresponding access strategy is allowed; in another example, access control information 2 for cell 0001 includes the following information: AC1, AI2, the corresponding access strategy is forbidden; in yet another example, the access control information of cell 0002 includes the following information: the AC is AC1, the AI is AI1, and the corresponding access policy is allowed.

In another optional implementation, the access control information of the cell may further include: and (4) PLMN information. By adopting the mode of including the PLMN information in the access control information, operators can be helped to realize more accurate deployment of control strategies. In one example, access control information 3 for cell 0001 includes the following information: AC1, AI1, PLMN ID 46001, and the corresponding access strategy is forbidden; in another example, the access control information of cell 0003 includes the following information: AC1, AI1, PLMN ID 46000, the corresponding access policy is allowed.

When the access control information of the cell includes PLMN information, the UE indicates that the access control information is applicable only to a UE whose home PLMN is a specified PLMN ID; when the access control information of the cell does not include PLMN information, it indicates that the access control information can be applied to a UE whose home PLMN is any PLMN.

In yet another alternative embodiment, the access control information of the cell may also only include PLMN information and corresponding access policy. In one example, the access control information of cell 0003 includes the following information: the PLMN ID is 46002, the corresponding access policy is barring, and the access control information indicates that any UE with an AC and AI combination whose home PLMN is 46002 is allowed to access the cell 0003.

S1002, obtaining the access parameter of the UE 2.

Wherein, the execution subject of the step can be UE1 or UE 2. In an example, when the access control information of the serving cell is acquired from the UE1 by the UE2 in S1001, S1002 may include: the UE2 may obtain its access parameters from itself. In another example, when the UE1 acquires the access control information of the serving cell in S1001, S1002 may include: the UE1 may obtain access parameters for the UE2 from the UE 2.

For example, based on the service requirement of the UE2, the UE2 obtains the access parameter corresponding to the RRC connection initiated this time from the Access Stratum (AS). Illustratively, the Access parameter may include a combination of an Access Category (AC) and an Access Identity (AI).

In other embodiments of the present application, the access parameters may also include PLMN information for the UE 2. Illustratively, a selected PLMN ID (selected PLMN ID) may be used. For example, the PLMN information of the UE2 is determined according to the user subscription information in the SIM card of the UE2, e.g., may be an identity of a mobile operator to which the UE2 subscribes. In other embodiments of the present application, the PLMN of the UE2 may also be an identification of a mobile operator that the user supports roaming.

S1003, determining whether to allow the UE2 to access the serving cell of the UE1 according to the access control information of the serving cell and the access parameter of the UE 2.

Here, it may be determined whether to allow the UE2 to access the serving cell according to the access control information of various cells shown in step S1001, for example. In an example, reference may be made to the related description in section 5.3.14 of TS 38.331.

In the embodiment of the present application, it should be noted that both the UE1 and the UE2 may perform the above step of determining whether to allow access.

In an alternative embodiment, the UE1 may send the access control information of the serving cell to the UE2 before performing S1003, and then the UE2 determines whether to allow the UE2 to access the serving cell of the UE1 according to the access control information of the serving cell of the UE1 and the access parameters of the UE 2.

In another alternative embodiment, the UE2 may send the access parameters of the UE2 to the UE1 before performing S1003, after which the UE1 determines whether to allow the UE2 to access the serving cell of the UE1 according to the access control information of the serving cell of the UE1 and the access parameters of the UE 2.

Various embodiments of the UE1 and the UE2 for obtaining the determination result are also provided in other embodiments of the present application, and refer to the detailed description in embodiment two.

S1004 executes the permission processing flow when determining permission of access, or executes the prohibition processing flow when determining prohibition of access.

It should be noted that, at each stage of the processing flow of the UE2 accessing the serving cell through the UE1, a determination result of whether to allow the UE2 to access the serving cell of the UE1 may be obtained. Moreover, for the determination result, the embodiment of the present application further provides a plurality of subsequent processing flows. Illustratively, when the determination result is allowable, the UE2 is allowed to initiate the procedure of accessing the serving cell through the UE1, or the UE1 is allowed to assist the UE2 to complete the procedure of accessing the serving cell through the UE2 and the UE 1; when the determination result is forbidden, the UE2 is forbidden to initiate the procedure of accessing the serving cell through the UE1, or the UE1 prevents the UE2 from accessing the serving cell through the UE 1.

Fig. 1D is a flowchart illustrating that a UE2 accesses a cell supported by a RAN through a UE1 according to an embodiment of the present disclosure. As shown in fig. 1D, access to a cell by a UE2 through a UE1 may include a three-phase flow.

In the first phase, the UE1 and the UE2 perform a discovery process.

In the second phase, the UE1 and the UE2 perform a procedure for establishing a sidelink unicast connection.

In the third phase, the UE1, UE2, RAN perform a procedure to establish an RRC connection between the UE2 and the RAN through the UE 1.

In the embodiments of the present application, there are various implementations of the flow of the discovery process in the first stage.

In one example, the Model A discovery process includes: the UE1 sends a first discovery message to the UE 2. Wherein the first discovery message is used to indicate that the UE1 supports being a relay UE. Upon receiving the first discovery message of UE1, UE2 may determine UE1 as a relay UE.

In another example, the Model B discovery process includes: the UE2 sends a second discovery request to the UE 1; the UE1 sends a second discovery response to the UE 2. Wherein the second discovery request is used to indicate that the UE2 requests a relay UE; the second discovery response may indicate that the UE1 supports being a relay UE. Upon receiving the second discovery response of the UE1, the UE2 may determine the UE1 as the relay UE.

In an embodiment of the present application, the establishment procedure of the sidelink unicast connection in the second stage may include: the UE2 sends a unicast connection establishment request to the UE1, the unicast connection establishment request requesting establishment of a sidelink unicast connection between the UE1 and the UE 2; thereafter, the UE1 sends a unicast connection establishment response to the UE2, which may be used to indicate that the unicast connection establishment is complete. It should be noted that, before the UE1 sends the unicast connection establishment response to the UE2, the UE1 and the UE2 may also perform security negotiation, for example, the UE1 sends a security negotiation request to the UE2, and the UE2 sends a security negotiation response to the UE 1. The steps related to sending the unicast connection establishment response in other embodiments of the present application may be preceded by an interactive message for security negotiation between the UE1 and the UE2, which is not shown in the drawings of the embodiments of the present application.

In this embodiment, the RRC connection establishment procedure in the third phase may include: the UE2 sends an RRC connection establishment request to the RAN through the UE1, the RRC connection establishment request requesting establishment of an RRC connection between the UE2 and the RAN; thereafter, the RAN sends an RRC connection setup to the UE2 through the UE1, and then the UE2 sends an RRC connection setup complete to the RAN through the UE1, the RRC connection setup complete indicating that the RRC connection setup between the UE2 and the RAN is complete, that is, the UE2 accesses the RAN.

For example, in the RRC connection establishment procedure, the UE1 may forward an interaction message between the UE2 and the RAN for establishing the RRC connection as follows. In an alternative embodiment, the UE2 sends an RRC connection setup request to the UE 1; UE1 forwards the RRC connection setup request to the RAN; the RAN sends an RRC connection setup to the UE 1; UE1 forwards the RRC connection setup to UE 2; the UE2 sends an RRC connection setup complete to the UE 1; the UE1 forwards the RRC connection setup complete to the RAN. It should be noted that in some application scenarios, the UE1 may directly forward the above interaction messages for establishing the RRC connection between the UE2 and the RAN without parsing the interaction messages.

In combination with the processing flows of the three phases, in the access control method provided by the present application, there are various embodiments of the subsequent processing flows after the UE1 and the UE2 obtain the determination results at different phases.

In an alternative embodiment, when the above determination step is performed by the UE2, the UE2 may decide whether to initiate a procedure of establishing a sidelink unicast connection between the UE1 and the UE2 to the UE1 according to the determination result, or decide whether to initiate a procedure of establishing an RRC connection between the UE2 and the RAN to which the serving cell belongs through the UE1 according to the determination result. Table 1 is an illustration of the allowed and disallowed process flows for the UE2 at different stages.

TABLE 1

The first discovery message is a message sent by the UE1 to the UE2 in a broadcast manner in the Model A discovery process; the second discovery response is a second response message sent by the UE1 to the UE2 for the second discovery request sent by the UE2 in the Model B discovery process. After the UE1 establishes the sidelink unicast connection with the UE2, access control information of the cell may also be transmitted between the UE1 and the UE2 through sidelink rrc (sl rrc) messages on the sidelink.

It should be noted that, in an alternative application, the access control information of the serving cell sent by the UE1 to the UE2 may be used to instruct the UE2 to determine whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameter of the UE 2. In this way, the UE1 may decide whether access control is needed for the UE2 to access the serving cell. In another alternative application, the UE2 may first send an information acquisition indication to the UE1, where the information acquisition indication is used to indicate that the UE1 sends the access control information of the serving cell to the UE2, and then the UE1 sends the access control information of the serving cell to the UE2, in this way, the UE2 may determine whether to need to perform access control on the UE2 accessing the serving cell.

In another alternative embodiment, when the above determination step is performed by the UE1, the UE1 may decide, according to the determination result, subsequent processing upon receiving a unicast connection establishment request for establishing a sidelink unicast connection transmitted by the UE2, or may decide, according to the determination result, subsequent processing upon receiving an RRC connection establishment request for establishing an RRC connection between the UE2 and the RAN transmitted by the UE 2. Table 2 is an illustration of the process flow for enabling and disabling the UE1 at different stages.

TABLE 2

Wherein, the stage of the UE1 receiving the access parameter of the UE2 may include: the second discovery request, the unicast connection establishment request and the unicast second discovery request are messages sent by the UE2 to the UE1 in a broadcast manner in the Model B discovery process. After the UE1 establishes the sidelink unicast connection with the UE2, the access parameters of the UE2 may also be transmitted between the UE1 and the UE2 through sidelink rrc (sl rrc) messages on the sidelink.

It should be noted that there are various embodiments for the UE1 to receive the access parameters of the UE2 during the RRC connection establishment request phase. In an example, the UE2 may send an RRC connection setup request and access parameters of the UE2 to the UE 1. In another example, when the UE2 sends the RRC connection establishment request to the RAN through the UE1, the UE2 carries the access parameters of the UE2 in the RRC connection establishment request and sends the RRC connection establishment request to the UE1, and the UE1 may parse the RRC connection establishment request and extract the access parameters of the UE2 therein in the RRC connection establishment request sent by the UE 2.

For example, after the UE2 sends the access parameter of the UE2 to the UE1, when the determination result is allowed, the UE1 sends a unicast connection establishment response to the UE2, and when the UE2 receives the unicast connection establishment response, the UE2 may consider that the UE2 is determined to be allowed to access the serving cell, and then initiate a procedure of establishing an RRC connection between the UE2 and the RAN to which the serving cell belongs through the UE 1. The UE1 sends a second discovery reject to the UE2 when the determination is allowed, wherein the reject cause value may be a forbidden access cell. The UE2, upon receiving the second discovery reject, may consider the UE2 determined to be allowed to access the serving cell, and then initiate a procedure for establishing an RRC connection between the UE2 and the RAN to which the serving cell belongs via the UE 1.

It should be noted that, in an alternative application, the access parameter of the UE2 sent by the UE2 to the UE1 may be used to instruct the UE1 to determine whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameter of the UE 2. In this way, the UE2 may decide whether access control is needed for the UE2 to access the serving cell. In another alternative application, the UE1 may first send a parameter acquisition indication to the UE2, where the parameter acquisition indication may be used to indicate that the UE2 sends the access parameter of the UE2 to the UE1, and then the UE2 sends the access parameter of the UE2 to the UE1, in this way, the UE1 may determine whether to need to perform access control on the UE2 accessing the serving cell.

The embodiment of the present application further provides an optional implementation manner, after the UE2 sends the access parameter of the UE2 to the UE1, and the UE1 determines whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameter of the UE2, the UE1 may further send a determination result indicating that the UE2 is allowed or prohibited to access the serving cell to the UE2, and then the UE2 performs subsequent steps according to the determination result, for example, the UE2 may determine whether to allow itself to access the cell according to the received determination result, perform an allowing processing flow when determining to allow access, and perform a prohibiting processing flow when determining to prohibit access.

Table 3 is an illustration of the allowed and prohibited process flows when the UE2 receives the determination results at different stages.

TABLE 3

After the sidelink unicast connection is established, the UE2 may send the access parameters of the UE2 to the UE1 through a sidelink RRC message, and the UE1 may send the determination result to the UE2 through a sidelink RRC message.

It should be noted that, in an alternative application, the access parameter of the UE2 sent by the UE2 to the UE1 may be used to instruct the UE1 to determine whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameter of the UE2, and send the determination result to the UE2, and then, the UE2 may determine whether to initiate a subsequent procedure.

In the three-phase processing flow of accessing, by the UE1, the UE2 to the cell supported by the RAN through the UE1, after receiving the connection indication message, the UE1 may indicate that the UE enters the connected state if detecting that the UE is in the unconnected state.

Fig. 1E is a schematic diagram of a processing flow of the UE1 entering a connected state from a non-connected state according to an embodiment of the present application. Referring to fig. 1E, the steps of this embodiment may include:

s1401, the UE2 sends a connection indication message to the UE 1.

Wherein the connection indication message may be used to instruct the UE1 to enter a connected state to perform subsequent steps.

In an example, the connection indication message may be any one of a second discovery request, a unicast connection establishment request, a sidelink RRC message, and a first RRC connection establishment request. In another example, the connection indication message may carry indication information indicating that the UE1 entered the connected state.

It should be noted that, in the embodiment of the present application, the RRC connection establishment request sent by the UE2 to the UE1 is a first RRC connection establishment request, and the first RRC connection establishment request is used to request establishment of an RRC connection between the UE2 and the RAN.

S1402, while the UE1 is in the unconnected state, the UE1 sends a second RRC connection setup request to the RAN.

Wherein the second RRC connection establishment request is for requesting establishment or reestablishment of an RRC connection between the UE1 and the RAN. In an example, while the UE1 is in an Idle state (Idle), the UE1 may send an RRC connection setup request (RRCSetupRequest) message to the RAN. In another example, while the UE1 is in a deactivated state (Inactive), the UE1 may send an RRC connection resume (RRCResumeRequest) message to the RAN.

In this embodiment of the present application, the second RRC connection establishment request may carry information such as a connection establishment cause value. In an example, if the connection indication message is the first RRC connection establishment request, the connection establishment cause value in the second RRC connection establishment request may be the connection establishment cause value in the first RRC connection establishment request, or relay (relay); in another example, if the connection indication message is a unicast connection establishment request, the connection establishment cause value in the second RRC connection establishment request may be a connection establishment cause value for establishing an RRC connection between the UE2 and the RAN, which is carried in the unicast connection establishment request.

It should be noted that after the UE1 sends the second RRC connection establishment request to the RAN, the RAN may detect whether the UE1 supports serving as a relay terminal, send the second RRC connection establishment to the UE1 when determining that the UE1 supports serving as a relay terminal, and send the second RRC connection rejection to the UE1 when determining that the UE2 does not support serving as a relay terminal. Illustratively, the connection establishment cause value in the second RRC connection establishment request may be a relay, the second RRC connection establishment request may carry PLMN information of the UE2, and when the PLMN information of the UE2 is the same as the PLMN information of the UE1, the RAN determines to allow the UE1 to serve as a relay terminal for the UE 2.

In the embodiment of the present application, if the RAN determines that the UE1 can serve as a relay terminal for the UE2, steps S1402 may further include S1403-S1405.

S1403, the RAN sends the second RRC connection setup to the UE 1.

S1404, the UE1 sends a second RRC connection setup complete to the RAN.

S1405, the subsequent processing steps of the normal flow related to the connection instruction message are executed.

Table 4 is an illustration of the subsequent processing steps of the normal flow associated with the connection indication message.

TABLE 4

Wherein, for different connection indication messages, the processing steps after the UE1 sends the second RRC connection establishment request to the RAN may include corresponding steps a1, a2, A3.

In the embodiment of the present application, if the RAN determines that the UE1 cannot serve as the relay terminal of the UE2, S1406-S1407 may be further included after the step S1402.

S1406, the RAN sends a second RRC connection reject to the UE 1.

S1407, a subsequent processing step of the abnormal flow relating to the connection instruction message is executed.

Table 5 is an illustration of the subsequent processing steps of the exception flow associated with the connection indication message.

TABLE 5

Wherein, for different connection indication messages, the processing steps after the UE1 sends the second RRC connection establishment request to the RAN may include corresponding steps B1, B2, and B3.

In other embodiments of the present application, a detailed description will be given with reference to an implementation of a three-phase process flow in which the UE2 accesses a cell supported by the RAN through the UE 1. It should be noted that the second RRC connection establishment request is used to request establishment or recovery of an RRC connection between the UE1 and the RAN. Illustratively, the second RRC connection establishment request may be a RRCSetupRequest message when the UE1 is in an idle state and a rrcresumrequest message when the UE1 is in a deactivated state. Reference is made to the description of examples three and four in this application.

In a manner that the UE1 sends a second RRC connection establishment request to the RAN to cause the UE1 to migrate or enter a connected state upon receiving either of the connection indication messages, the UE1 can provide a transport channel for the interaction messages between the UE2 and the RAN to establish the RRC connection.

In the embodiments of the present application, various embodiments of obtaining the determination result and the subsequent processing flow based on the determination result will be described by way of example, and reference may be made to the detailed description in the third embodiment and the fourth embodiment.

Example two

In the access control method provided in the embodiment of the present application, before performing the permission processing procedure or the prohibition processing procedure, the UE1 and the UE2 obtain the determination result in various embodiments.

Fig. 2A is a first schematic flow chart illustrating a process of obtaining a determination result in the access control method according to the embodiment of the present application. Flow a and flow C in fig. 2A are schematic flows of the acquisition determination result of the determination step performed by the UE1, and flow B is a schematic flow of the acquisition result of the determination step performed by the UE 2.

As shown in fig. 2A, the flow a may be used to implement the UE1 to obtain the determination result. The steps of scheme a include:

s2003-1, the UE2 sends the access parameters of the UE2 to the UE 1.

Here, for example, the UE2 may send the access parameters of the UE2 through the second discovery request sent by the UE2 in the first phase to the UE1, the unicast connection establishment request in the second phase, the sidelink RRC message after the second phase, and the RRC connection establishment request message in the third phase. As will be described in detail in other embodiments of the present application.

S2004-1, the UE1 determines whether to allow the UE2 to access the serving cell according to the access control information and the access parameter of the serving cell.

See, among other things, the relevant description in S1003.

As shown in fig. 2A, the flow B may be used to implement the UE2 to obtain the determination result. The steps of scheme B include:

s2003-2, the UE1 sends access control information of the serving cell to the UE 2.

The UE1 may send the access control information in a broadcast manner, for example. Illustratively, the UE1 may be broadcast periodically over the PC5 interface. Illustratively, the UE1 may transmit a first discovery message to the UE2 through the UE1 in the first phase. In an alternative embodiment, a new destination identifier may be introduced for broadcasting, where the destination identifier is used to indicate that the broadcasted data is system information of a cell. In another alternative embodiment, it may be indicated in Sidelink Control Information (SCI) that the system information of the cell is broadcasted. In yet another alternative embodiment, a new physical channel may be introduced to broadcast or transmit the access control information of the serving cell.

In the embodiment of the present application, the UE1 may also send the access parameters of the UE2 through a second discovery response sent by the UE1 in the first phase to the UE2, a unicast connection establishment response in the second phase, a sidelink RRC message after the second phase, an RRC connection establishment in the third phase, and so on.

In an example, the UE1 may send Unified access control information (Unified access control info) to the UE2, which may include access control information for one or more cells. The unified access control information may be referred to as defined in the TS 24.501 protocol.

S2004-2, the UE2 determines whether to allow the UE2 to access the serving cell according to the access control information and the access parameter of the serving cell.

See, among other things, the relevant description in S1003.

As shown in fig. 2A, the flow C is another implementation manner for the UE2 to obtain the determination result. On the basis of the process A, the method further comprises the following steps:

s2005, the UE1 transmits the determination result to the UE 2.

For example, there are various embodiments for the UE1 to send the determination result to the UE 2. In an example, the determination may include an indication of enable or disable. In another example, the UE1 may indicate that the determination is enabled by sending a message to continue the subsequent flow or that the determination is disabled by sending a message to disable the subsequent flow. For example, after the UE1 receives the unicast connection establishment request, the UE1 may send a unicast connection establishment response when the determination result is allowed, or the UE1 may send a unicast connection rejection when the determination result is forbidden.

It is noted that the UE1 and the UE2 may support one or more of the above-described process flows a, B, or C.

In the embodiment of the present application, the determination result of whether to allow the UE2 to access the serving cell may also be determined according to the access control information of the serving cell corresponding to the PLMN information of the UE2 and the access parameter of the UE 2. By adopting a mode of determining whether to allow access according to the access control information corresponding to the PLMN information of the UE2, an operator can be helped to implement more accurate access control deployment.

In an example, the following embodiments can also be adopted in the flow a and the flow B in fig. 2A.

Fig. 2B is a schematic flowchart of a second process for obtaining a determination result in the access control method according to the embodiment of the present application. After step S2002, as shown in fig. 2B, the process B may also be implemented by the following steps:

S2003-1B, the UE2 sends the access parameters of the UE2 to the UE1, including PLMN information of the UE 2.

The PLMN information may be a PLMN ID. Step S2003-1B may be implemented as an alternative to step S2003 in fig. 2A. In the embodiment of the present application, for example, the UE2 may carry the PLMN of the UE2 through messages such as a second discovery request sent by the UE2 in the first phase to the UE1, a unicast connection establishment request in the second phase, and a sidelink RRC message after the second phase. As will be described in detail in other embodiments of the present application.

S2006, the UE1 obtains access control information of a serving cell corresponding to the PLMN information of the UE 2.

Any of the one or more pieces of access control information received by the UE1 from the RAN may include PLMN information. Thereafter, the UE1 may obtain access control information for the serving cell that is applicable to the PLMN information for the UE2 from the received access control information. Taking the access control information described in step S1001 as an example, if the PLMN information of the UE2 is 46000, the UE1 may acquire the access control information with the cell identifier of 0001 and the PLMN information of 46000, and the access control information with the cell identifier of 0001 and not including the PLMN information.

S2004-1B, the UE1 determines whether to allow the UE2 to access the serving cell according to the access control information of the serving cell corresponding to the PLMN information of the UE2 and the access parameter of the UE 2.

See, among other things, the relevant description in S1003.

For example, table 6 is a set of illustrations of interaction messages when UE2 sends PLMN information for UE2 to UE 1.

TABLE 6

The first to fourth examples show four kinds of messages and interactive flows for sending each information. Wherein, the step of sending the request to report the access parameter indication of the UE2 to the UE2 by the UE1 is optional. As shown in example two, after the UE1 receives the second discovery request from the UE2, the UE1 may send an indication requesting reporting of an access parameter of the UE2 in the second discovery response, the UE2 may send an access parameter of the UE2 to the UE1 in the unicast connection establishment request, then the UE1 may obtain access control information of a serving cell corresponding to PLMN information of the UE2 from access control information of one or more cells received from the RAN in advance, then follow the obtained access control information and the AC and AI of the UE2 to determine whether to allow the UE2 to access the serving cell, when the determination result is allowed, the UE1 performs an allowance processing procedure, that is, sends a unicast connection establishment response to the UE2, and when the determination result is forbidden, the UE1 performs a prohibition processing procedure, that is, to send a unicast connection rejection to the UE 2.

Fig. 2C is a third schematic flowchart of a process of obtaining a determination result in the access control method according to the embodiment of the present application. After step S2002, as shown in fig. 2C, the following steps may be further employed in the process a and the process B:

s2007, the UE2 sends the PLMN information of the UE2 to the UE 1.

The PLMN information may be a PLMN ID. For example, the UE2 may carry PLMN information of the UE2 and an RRC connection establishment request of the third phase through messages such as a second discovery request, a unicast connection establishment request of the second phase, and a side link RRC message after the second phase, which are sent by the UE2 to the UE1 in the first phase. As will be described in detail in other embodiments of the present application.

The implementation manner of this step can refer to the detailed description of S2006 in fig. 2B.

S2003-3, the UE1 sends the access control information of the serving cell corresponding to the PLMN information of the UE2 to the UE 2.

In an example, when the UE2 sends the second discovery request carrying PLMN information of the UE2 to the UE1 in step S2007, the UE1 may send a second discovery response carrying access control information of the serving cell to the UE2 in step S2003-3.

In an example, when the UE2 sends a unicast connection establishment request carrying PLMN information of the UE2 to the UE1 in step S2007, the UE1 may send a unicast connection establishment response carrying access control information of the serving cell to the UE2 in step S2003-3, or separately send a sidelink RRC message carrying access control information of the serving cell after the unicast connection establishment response.

In an example, when the UE2 sends a sidelink RRC message carrying PLMN information of the UE2 to the UE1 in step S2007, the UE1 may send a sidelink RRC message carrying access control information of the serving cell to the UE2 in step S2003-3.

In an example, when the UE2 sends an RRC connection establishment request carrying PLMN information of the UE2 to the UE1 in step S2007, the UE1 may send an RRC connection establishment or a sidelink RRC message carrying access control information of the serving cell to the UE2 in step S2003-3.

The implementation of S2003-3 will be described in detail in other embodiments of the present application.

S2004-2B, the UE2 determines whether to allow the UE2 to access the serving cell according to the access control information of the serving cell corresponding to the PLMN information of the UE2 and the access parameter of the UE 2.

See, among other things, the relevant description in S1003.

For example, table 7 is another set of indications of interaction messages when UE2 sends PLMN information for UE2 to UE 1.

TABLE 7

Wherein, examples five to eight respectively show four flows of messages and interaction for sending each information.

With either of the manners shown in fig. 2B and fig. 2C, the operator can further make a more accurate access control policy according to the PLMN information.

EXAMPLE III

The following describes in detail the processing flow after obtaining the determination result in combination with the three stages of the access process.

In the embodiment of the present application, the UE1 or the UE2 may perform the step of allowing the process flow or prohibiting the process flow according to the determination result of whether to allow the UE2 to access the serving cell. In the present embodiment, before performing the permission process flow and the prohibition process flow, the UE1 and the UE2 may perform various flows of obtaining determination results provided in the foregoing embodiments.

The following exemplifies whether the UE2 and the UE1 perform the permission process flow or the prohibition process flow, respectively. It should be noted that, in the embodiment of the present application, the UE1 and the UE2 may support the allowed process flow and the prohibited process flow separately or simultaneously. In addition, the UE1 and the UE2 may support one or more allowed process flows and prohibited process flows provided by embodiments of the present application separately or simultaneously. This is not limited by the present application.

Fig. 3A is a first schematic processing flow diagram after a determination result is obtained in the access control method according to the embodiment of the present application. Wherein the UE2 may obtain the determination result before sending the second stage unicast connection establishment request, for example, the UE2 may obtain the determination result by any of the methods of obtaining the determination result by the UE2 in the foregoing embodiments.

As shown in fig. 3A, the step of allowing the process flow after the UE2 obtains the determination result may include:

s3011, upon determining to allow the UE2 to access the serving cell, the UE2 sends a unicast connection establishment request to the UE 1.

In the embodiment of the present application, the procedure related to the UE2 initiating the establishment of the unicast connection may be implemented by the V2X layer of the remote terminal, for example. It should be noted that, for example, the UE1 may send the access control information of the serving cell of the UE1 to the UE2 through the first discovery message in the Model a discovery procedure or the second discovery response in the Model B discovery procedure. The AS layer of the UE1 itself may send the access control information of the serving cell to an upper layer of the AS layer, and the upper layer of the AS layer may package the access control information in the first discovery message. In other embodiments of the present application, before the UE1 sends the second discovery response to the UE2, the UE2 may also send the second discovery response carrying the PLMN information of the UE2 to the UE1, so that the UE1 sends the access control information of the serving cell corresponding to the PLMN information of the UE2 to the UE 2. The embodiment of the present application does not limit this.

S3012, the UE1 sends a unicast connection establishment response to the UE 2.

S3020, a process flow of establishing a first RRC connection between the UE2 and the RAN.

The first RRC connection is an RRC connection between the UE2 and the RAN to which the serving cell belongs. This step may be implemented using the steps performed by the UE1, UE2, and RAN in the third phase.

Optionally, if the UE1 is in an Idle state or an Inactive state when receiving the unicast connection establishment request, the embodiment of the present application may further include the steps shown in the flow D:

s3021, while the UE1 is in the unconnected state, the UE1 sends a second RRC connection setup request to the RAN.

Wherein the second RRC connection establishment request is for requesting establishment of an RRC connection between the UE1 and the RAN. The second RRC connection establishment request may carry a connection establishment cause value, which may be used to indicate that the current RRC connection of the UE1 is used as a relay terminal to help the UE2 access the RAN. Illustratively, the cause value may be relay (relay). In this embodiment, the connection establishment cause value in the second RRC connection establishment request may also be a connection establishment cause value for the UE2 and the RAN establishing an RRC connection, which is carried in the unicast connection establishment request. The connection establishment cause value carried in the unicast connection establishment request may be determined by the UE2 according to the service requirement of the UE triggering the establishment of the unicast connection before sending the unicast connection establishment request. In the embodiment of the present application, for example, when the UE1 receives the unicast connection establishment request, the upper layer of the UE1 itself may trigger the AS layer to detect whether itself is in a connected state, and trigger the process flow of establishing the RRC connection between the UE1 and the RAN when the UE1 is in a non-connected state, where the upper layer may be a protocol layer above the AS layer, such AS the V2X layer or the PC5-S layer.

S3022, the RAN sends the second RRC connection setup to the UE 1.

S3023, the UE1 sends a second RRC connection setup complete to the RAN.

In various embodiments of the present application, it should be noted that, when the UE1 is in the Idle state, the second RRC connection establishment request sent by the UE1 to the RAN may be an RRCSetupRequest message, the second RRC connection establishment sent by the RAN to the UE1 may be an RRCSetupRequest message, and the second RRC connection establishment completion sent by the UE1 to the RAN may be an RRCSetupComplete message. When the UE1 is in the Inactive state, the second RRC connection establishment request sent by the UE1 to the RAN may be a rrcresemequest message, the second RRC connection establishment sent by the RAN to the UE1 may be a rrcresememe message, and the second RRC connection establishment completion sent by the UE1 to the RAN may be a rrcresemecomplete message.

The steps shown in the above flow D may be executed before S3012 or after S3012. In some scenarios, the UE1 may also perform S3021 and S3012 simultaneously.

As shown in fig. 3A, the step of prohibiting the process flow after the UE2 obtains the determination result may include:

s3061, reselecting the relay terminal when determining to prohibit the UE2 from accessing the serving cell.

Among other things, since a unicast connection has not been established between UE1 and UE2, UE2 may attempt to reselect a relay terminal to access a serving cell through other relay terminals or to access other RANs through other relay terminals. The embodiments of the present application do not limit this.

In the embodiment of the present application, after S3021, if the RAN determines that the UE1 does not support the relay terminal as the UE2, the RAN may send a second RRC connection rejection to the UE1, and a connection rejection reason value in the second RRC connection rejection may be, for example, that the relay is not supported. After that, if the UE1 has not sent S3012 to the UE2, the UE1 may send a unicast connection rejection to the UE2, where a connection rejection cause value in the unicast connection rejection may be, for example, that relay is not supported; if the UE1 has sent S3012 to the UE2, the UE1 may send a unicast connection release to the UE2, where a connection release cause value of the unicast connection release may be, for example, that relay is not supported. The UE1 may perform the step of reselecting the relay terminal after receiving a unicast connection release or a unicast connection rejection.

In this way, the UE2 sends a unicast connection request for establishing a sidelink unicast connection only when the UE2 is allowed to access the serving cell, which can avoid unnecessary message transmission during the unicast connection phase, and can reduce the load of not only the cell but also the sidelink and the UE 1.

Fig. 3B is a schematic diagram of a processing flow after a determination result is obtained in the access control method according to the embodiment of the present application. Wherein the UE2 may obtain the determination result before sending the RRC connection establishment request of the third phase. For example, the UE2 may obtain the determination result by any of the methods for obtaining the determination result by the UE2 in the foregoing embodiments.

As shown in fig. 3B, before executing the permission processing flow or the prohibition processing flow, the method includes:

s3110, a process flow of establishing a sidelink unicast connection between the UE1 and the UE 2.

Wherein, the steps can be implemented by the steps executed by the UE1 and the UE2 in the second phase. The UE2 may obtain the determination result in S3110, or may obtain the determination result in the sidelink RRC message after S3110.

In an alternative embodiment, after S3110, the step of the UE2 obtaining the permission processing flow after determining the result may include:

s3121, upon determining to allow the UE2 to access the serving cell, the UE2 sends a first RRC connection setup request to the UE 1.

In the embodiment of the present application, the first RRC connection establishment request is used to request establishment of an RRC connection between the UE2 and the RAN to which the serving cell belongs.

S3131, the UE1 sends a first RRC connection setup request to the RAN.

S3132, the RAN sends the first RRC connection setup to the UE 1.

S3122, the UE1 sends a first RRC connection setup to the UE 2.

S3123, the UE2 sends a first RRC connection complete to the UE 1.

S3133, the UE1 sends a first RRC connection setup complete to the RAN.

The steps S3131-S3133 may be implemented by using the steps performed by the UE1, the UE2, and the RAN in the third phase.

Optionally, if the UE1 is in an Idle state or an Inactive state when receiving the first RRC connection establishment request, the embodiment of the present application may further include the steps shown in the flow D:

s3141, while the UE1 is in the unconnected state, the UE1 sends a second RRC connection setup request to the RAN.

S3142, the RAN sends the second RRC connection setup to the UE 1.

S3143, the UE1 sends a second RRC connection setup complete to the RAN.

It should be noted that the steps shown in the above flow D may be executed before S3122. In some scenarios, the UE1 may also perform S3141 and S3122 simultaneously.

In another embodiment, as shown in fig. 3B, after S3110, the step of prohibiting the process flow after the UE2 obtains the determination result may include:

s3161, upon determining to prohibit the UE2 from accessing the serving cell, the UE2 sends a unicast connection release to the UE 1.

Wherein the unicast connection release is for releasing a side link unicast connection between the UE1 and the UE 2. In an example, the connection release cause value in the unicast connection release may be a barring access cell.

S3162, upon determining to prohibit the UE2 from accessing the serving cell, the UE2 reselects the relay terminal.

Wherein, step S3162 is an optional step, which can be referred to as the description in S3061.

In the embodiment of the present application, after S3141, if the RAN determines that the UE1 does not support the relay terminal as the UE2, the RAN may send a second RRC connection rejection to the UE1, and a connection rejection cause value in the second RRC connection rejection may be, for example, that the relay is not supported. After that, the UE1 may send a first RRC connection rejection to the UE 2; alternatively, the UE1 ignores the first RRC connection establishment request, and sends a unicast connection release to the UE 2. The connection rejection cause value of the first RRC connection rejection may be, for example, that relay is not supported, and the connection release cause value in the unicast connection release may be, for example, that relay is not supported. After receiving the unicast connection release or the rejection of the first RRC connection, the UE1 may release the resources related to the sidelink unicast connection, and then perform the steps related to reselecting the relay terminal.

In this way, the UE2 only sends the first RRC connection establishment request when the UE2 is allowed to access the serving cell, which can avoid unnecessary message transmission during the RRC connection phase, and can reduce the load on not only the cell but also the sidelink and UE 1.

Fig. 3C is a schematic view of a processing flow after a determination result is obtained in the access control method according to the embodiment of the present application. Wherein the UE1 may obtain the determination before sending the unicast connection establishment request of the second stage. For example, the UE1 may obtain the determination result by any of the methods for obtaining the determination result by the UE1 in the foregoing embodiments.

As shown in fig. 3C, before executing the permission processing flow or the prohibition processing flow, the method includes:

s3211, the UE2 sends a unicast connection establishment request to the UE 1.

It should be noted that the UE1 may obtain the determination result by any method of obtaining the determination result by the UE2 in the foregoing embodiments. For example, the UE1 may obtain the access parameter of the UE2 in S3211, or may obtain the access parameter of the UE2 through the sidelink RRC message after S3211.

In an alternative embodiment, as shown in fig. 3C, after S3211, the step of the UE1 obtaining the determination result to allow the process to flow may include:

S3212, upon determining to allow the UE2 to access the serving cell, the UE1 sends a unicast connection establishment response to the UE 2.

S3220, a process flow of establishing a first RRC connection between the UE2 and the RAN.

S3221-B, when the UE1 is in a non-connected state, sends a second RRC connection establishment request.

S3222, the RAN sends the UE1 a second RRC connection setup.

S3223, the UE1 sends a second RRC connection setup complete to the RAN.

The step shown in the above flow D may be executed before S3212, or may be executed after S3212. In some scenarios, the UE1 may also perform S3221-B and S3212 simultaneously.

In an alternative embodiment, as shown in fig. 3C, after S3211, the step of the UE1 acquiring the prohibition processing flow after obtaining the determination result may include:

s3261, upon determining to prohibit UE2 from accessing the serving cell, UE1 sends a unicast connection rejection to UE 2.

Wherein the unicast connection rejection is for rejecting establishment of a unicast connection between the UE1 and the UE 2. In an example, the reject cause value in the unicast connection rejection may be a barring access cell.

S3262, the UE2 reselects the relay terminal.

In the embodiment of the present application, after S3221-B, if the RAN determines that the UE1 does not support the relay terminal as the UE2, the RAN may send a second RRC connection rejection to the UE1, and a connection rejection reason value in the second RRC connection rejection may be, for example, that the relay is not supported. Thereafter, if the UE1 has not sent S3212 to the UE2, the UE1 may send a unicast connection rejection to the UE2, wherein a connection rejection cause value in the unicast connection rejection may be, for example, that relay is not supported; if the UE1 has sent S3212 to the UE2, the UE1 may send a unicast connection release to the UE2, where a connection release cause value of the unicast connection release may be, for example, no support for relaying. The UE1 may perform the step of reselecting the relay terminal after receiving a unicast connection release or a unicast connection rejection.

In this way, the UE1 sends a unicast connection response for establishing a sidelink unicast connection only when the UE2 is allowed to access the serving cell, which can avoid unnecessary message transmission during the unicast connection phase, and can reduce the load of not only the cell but also the sidelink and the UE 1.

Fig. 3D is a schematic view of a processing flow after a determination result is obtained in the access control method according to the embodiment of the present application. Wherein the UE1 may obtain the determination before sending the unicast connection establishment request of the second stage. For example, the UE1 may obtain the determination result by any of the methods for obtaining the determination result by the UE1 in the foregoing embodiments.

Referring to FIG. 3D, the difference from the method shown in FIG. 3C is that S3221-B in FIG. 3C may employ S3321 in FIG. 3D as an alternative implementation. That is, the UE1, after receiving the unicast connection establishment request, may perform:

s3321, upon determining that the UE2 is allowed to access the serving cell and that the UE1 is in a non-connected state, sending a second RRC connection setup request.

The UE1 may trigger the operation of sending the second RRC connection establishment request to the RAN to move its state to the connected state only when it is determined that the UE2 is allowed to access the serving cell and the UE1 itself is in the idle state or the deactivated state.

It should be noted that S3321 may be performed before S3312 in S3321, or may be performed after S3312. In some scenarios, the UE1 may also perform S3321 and S3312 simultaneously.

In this way, the UE1 sends the second RRC connection establishment request for establishing the RRC connection between the UE2 and the RAN only when the UE2 is allowed to access the serving cell and when the UE is not connected, which can avoid unnecessary message transmission in the unicast connection phase, reduce the load of the cell, the downlink and the UE1, and also can early transition the state of the UE1 to the connected state, thereby shortening the access duration.

Fig. 3E is a schematic diagram of a processing flow after a determination result is obtained in the access control method according to the embodiment of the present application. Wherein the UE1 may obtain the determination before sending the RRC connection setup request to the RAN in the third phase. For example, the UE1 may obtain the determination result by any of the methods for obtaining the determination result by the UE1 in the foregoing embodiments.

As shown in fig. 3E, before executing the permission processing flow or the prohibition processing flow, the method includes:

s3410, a process flow of establishing the sidelink unicast connection between the UE1 and the UE 2.

See, among others, the description of S3110 in fig. 3B.

S3421, the UE1 sends a first RRC connection setup request to the UE 2.

In an alternative embodiment, after S3421, the step of the UE1 obtaining the permission processing flow after the determination result may include:

s3431, upon determining that the UE2 is allowed to access the serving cell and that the UE1 is in a non-connected state, the UE1 sends a first RRC connection setup request to the RAN.

S3432, the RAN sends the first RRC connection setup to the UE 1.

S3422, the UE1 sends a first RRC connection setup to the UE 2.

S3423, the UE2 sends a first RRC connection complete to the UE 1.

S3433, the UE1 sends a first RRC connection setup complete to the RAN.

In an alternative embodiment, after S3421, the step of prohibiting the process flow after the UE1 obtains the determination result may include:

S3461, upon determining to prohibit the UE2 from accessing the serving cell, send a first RRC connection reject or prohibit indication to the UE 2.

In an example, the reject cause value in the first RRC connection reject may be a barring access cell. In another example, the barring indication may be sent via a sidelink RRC message or a unicast connection release. For example, the connection release cause value in the unicast connection release may be a forbidden access cell.

S3462, the UE2 reselects the relay terminal.

See, among others, the description of S3162 in fig. 3B.

In this way, the UE1 sending the first RRC connection setup request to the RAN only when the UE2 is allowed to access the serving cell may avoid unnecessary messaging during the RRC connection phase, which may not only reduce the load on the cell, but also the load on the sidelink and UE 1.

Fig. 3F is a schematic view illustrating a processing flow after a determination result is obtained in the access control method according to the embodiment of the present application. Wherein the UE1 may obtain the determination before sending the RRC connection setup request to the RAN in the third phase. For example, the UE1 may obtain the determination result by any of the methods for obtaining the determination result by the UE1 in the foregoing embodiments.

Note that, the difference from fig. 3E is that a procedure D' may be included before the UE1 sends the first RRC connection request to the RAN.

As shown in fig. 3F, before executing the permission processing flow or the prohibition processing flow, the method includes:

s3510, establish a sidelink unicast connection between the UE1 and the UE 2.

S3521, the UE2 sends a first RRC connection setup request to the UE 1.

In an alternative embodiment, as shown in fig. 3F, after S3521, the step of the UE1 obtaining the determination result to allow the process flow may include:

s3541, upon determining that the UE2 is allowed to access the serving cell and that the UE1 is in a non-connected state, the UE1 sends a second RRC connection establishment request to the RAN.

See, among others, the description of S3321 in fig. 3D.

S3542, the RAN sends the second RRC connection setup to the UE 1.

S3543, the UE1 sends a second RRC connection setup complete to the RAN.

S3531, the UE1 sends a first RRC connection setup request to the RAN.

S3532, the RAN sends the first RRC connection setup to the UE 1.

S3522, the UE1 sends a first RRC connection setup to the UE 2.

S3523, the UE2 sends a first RRC connection complete to the UE 1.

S3533, the UE1 sends a first RRC connection setup complete to the RAN.

In an alternative embodiment, as shown in fig. 3F, after S3521, the step of the UE1 of prohibiting the processing flow after obtaining the determination result may include:

s3561, upon determining to prohibit the UE2 from accessing the serving cell, sends a first RRC connection reject or prohibit indication to the UE 2.

S3562, the UE2 reselects the relay terminal.

In the embodiment of the present application, after S3541, if the RAN determines that the UE1 does not support the relay terminal as the UE2, the RAN may send a second RRC connection rejection to the UE1, and a connection rejection cause value in the second RRC connection rejection may be, for example, that the relay is not supported. After that, the UE1 may send a first RRC connection rejection to the UE 2; alternatively, the UE1 ignores the first RRC connection establishment request, and sends a unicast connection release to the UE 2. The connection rejection cause value of the first RRC connection rejection may be, for example, that relay is not supported, and the connection release cause value in the unicast connection release may be, for example, that relay is not supported. After receiving the unicast connection release or the rejection of the first RRC connection, the UE1 may release the resources related to the sidelink unicast connection, and then perform the steps related to reselecting the relay terminal.

In this way, when the UE2 is allowed to access the serving cell and is not connected, the UE1 sends the second RRC connection establishment request for establishing the RRC connection between the UE and the RAN, and then sends the first RRC connection establishment request to the RAN, so that unnecessary message transmission in the RRC connection phase can be avoided, and not only can the load of the cell be reduced, but also the load of the side link and the UE1 can be reduced, and in addition, the state of the UE1 can be migrated to the connected state.

Fig. 3G is a schematic diagram of a processing flow after a determination result is obtained in the access control method according to the embodiment of the present application. Wherein the UE1 may obtain the determination before sending the unicast connection establishment request of the second stage. For example, the UE1 may obtain the determination result by any of the methods for obtaining the determination result by the UE1 in the foregoing embodiments.

As shown in fig. 3G, before executing the permission processing flow or the prohibition processing flow, the method includes:

s3610, process flow of discovery procedure between UE1 and UE 2.

It should be noted that the UE1 may obtain the determination result by any method of obtaining the determination result by the UE2 in the foregoing embodiments. Exemplarily, the UE1 may acquire access control information of the UE2 in S3610.

In an alternative embodiment, as shown in fig. 3G, after S3610, the step of allowing the process flow after the UE1 obtains the determination result may include:

s3611, upon determining to allow the UE2 to access the serving cell, the UE1 sends a permission indication to the UE 2.

S3612, the UE2 sends a unicast connection establishment request to the UE 1.

S3613, the UE1 sends a unicast connection setup response to the UE 2.

S3621, the UE2 sends a first RRC connection setup request to the UE 1.

S3631, the UE1 sends a first RRC connection setup request to the RAN.

S3632, the RAN sends the first RRC connection setup to the UE 1.

S3622, the UE1 sends a first RRC connection setup to the UE 2.

S3623, the UE2 sends a first RRC connection complete to the UE 1.

S3633, the UE1 sends a first RRC connection setup complete to the RAN.

Optionally, if the UE1 is in an Idle state or an Inactive state when receiving the first RRC connection establishment request, the embodiment of the present application may further include the steps shown in the flow D':

s3641, upon determining that the UE2 is allowed to access the serving cell and that the UE1 is in a non-connected state, the UE1 sends a second RRC connection establishment request to the RAN.

S3642, the RAN sends the second RRC connection setup to the UE 1.

S3643, the UE1 sends a second RRC connection setup complete to the RAN.

It should be noted that the step shown in the above flow D' may be executed before S3631.

In an alternative embodiment, as shown in fig. 3G, after S3610, the step of prohibiting the process flow after the UE1 obtains the determination result may include:

s3661, upon determining to prohibit the UE2 from accessing the serving cell, the UE1 sends a prohibit indication to the UE 2.

In an example, the cause value of the barring indication may be a barring access cell.

S3662, the UE2 reselects the relay terminal.

In this embodiment, after S3641, if the RAN determines that the UE1 does not support the relay terminal as the UE2, the RAN may send a second RRC connection rejection to the UE1, and a connection rejection cause value in the second RRC connection rejection may be, for example, that the relay is not supported. After that, the UE1 may send a first RRC connection rejection to the UE 2; alternatively, the UE1 ignores the first RRC connection establishment request, and sends a unicast connection release to the UE 2. The connection rejection cause value of the first RRC connection rejection may be, for example, that relay is not supported, and the connection release cause value in the unicast connection release may be, for example, that relay is not supported. After receiving the unicast connection release or the rejection of the first RRC connection, the UE1 may release the resources related to the sidelink unicast connection, and then perform the steps related to reselecting the relay terminal.

In this way, the UE1 only sends the permission indication when the UE2 is permitted to access the serving cell to indicate that the UE2 sends the unicast connection establishment request, which can avoid unnecessary message transmission during the establishment of the unicast connection phase, and can reduce the load of not only the cell but also the sidelink and the UE 1.

Fig. 3H is an eighth schematic processing flow diagram after a determination result is obtained in the access control method according to the embodiment of the present application. Wherein the UE1 may obtain the determination result before sending the RRC connection establishment request of the third phase. For example, the UE1 may obtain the determination result by any of the methods for obtaining the determination result by the UE1 in the foregoing embodiments.

As shown in fig. 3H, before executing the permission processing flow or the prohibition processing flow, the method includes:

s3710, establish the sidelink unicast connection between the UE1 and the UE 2.

In an alternative embodiment, as shown in fig. 3H, after S3710, the step of the UE1 obtaining the determination result to allow the process to flow may include:

S3711, upon determining to allow the UE2 to access the serving cell, the UE1 sends a permission indication to the UE 2.

S3721, the UE2 sends a first RRC connection setup request to the UE 1.

S3731, the UE1 sends a first RRC connection setup request to the RAN.

S3732, the RAN sends the first RRC connection setup to the UE 1.

S3722, the UE1 sends the first RRC connection setup to the UE 2.

S3723, the UE2 sends a first RRC connection complete to the UE 1.

S3733, the UE1 sends a first RRC connection setup complete to the RAN.

Optionally, if the UE1 is in an Idle state or an Inactive state when the first RRC connection establishment request is received, before S3731, the embodiment of the present application may further include the steps shown in the flow D':

s3741, upon determining that the UE2 is allowed to access the serving cell and that the UE1 is in a non-connected state, the UE1 sends a second RRC connection establishment request to the RAN.

S3742, the RAN sends the second RRC connection setup to the UE 1.

S3743, the UE1 sends a second RRC connection setup complete to the RAN.

s3761, upon determining to prohibit the UE2 from accessing the serving cell, the UE1 sends a unicast connection release to the UE 2.

In an example, the connection release cause value in the unicast connection release may be a barring access cell.

S3762, the UE2 reselects the relay terminal.

In the embodiment of the present application, after S3741, if the RAN determines that the UE1 does not support the relay terminal as the UE2, the RAN may send a second RRC connection rejection to the UE1, and a connection rejection reason value in the second RRC connection rejection may be, for example, that the relay is not supported. After that, the UE1 may send a first RRC connection rejection to the UE 2; alternatively, the UE1 ignores the first RRC connection establishment request, and sends a unicast connection release to the UE 2. The connection rejection cause value of the first RRC connection rejection may be, for example, that relay is not supported, and the connection release cause value in the unicast connection release may be, for example, that relay is not supported. After receiving the unicast connection release or the rejection of the first RRC connection, the UE1 may release the resources related to the sidelink unicast connection, and then perform the steps related to reselecting the relay terminal.

In this way, the UE1 only sends the permission indication when the UE2 is permitted to access the serving cell to instruct the UE2 to send the RRC connection establishment request, which can avoid unnecessary message transmission during the RRC connection establishment phase, and can reduce the load of not only the cell but also the sidelink and the UE 1.

Example four

The following describes an access control method provided in an embodiment of the present application by using a specific example.

Fig. 4A is a first schematic processing flow diagram of an access control method according to an embodiment of the present application. As shown in fig. 4A, the steps of the embodiment of the present application include:

s4111, the UE2 sends a unicast connection establishment request carrying access parameters of the UE2 to the UE 1.

The access parameters of the UE2 may include AC and AI, for example. Optionally, the PLMNID of the UE2 may also be included.

S4110, the UE1 determines whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameter of the UE 2; and executing the step of permitting the process flow when the determination result is permit, and executing the step of prohibiting the process flow when the determination result is prohibit.

When the access parameter of the UE2 includes the PLMN of the UE2, the UE1 may determine whether to allow the UE2 to access the serving cell according to the access control information of the serving cell corresponding to the PLMN of the UE 2. Reference is made to the description relating to the first embodiment.

As shown in fig. 4A, the step of allowing the process flow may include:

s4112, upon determining to allow the UE2 to access the serving cell, the UE1 sends a unicast connection establishment response to the UE 2.

S4120, a process flow of establishing a first RRC connection between the UE2 and the RAN.

S4121-B, while the UE1 is in the unconnected state, the UE1 sends a second RRC connection setup request to the RAN.

S4122, the RAN sends the second RRC connection setup to the UE 1.

S4123, the UE1 sends a second RRC connection setup complete to the RAN.

It should be noted that the steps shown in the above flow D may be executed before S4112, or may be executed after S4112. In some scenarios, the UE1 may also perform S4121-B and S4112 simultaneously.

As shown in fig. 4A, the step of inhibiting the process flow may include:

s4161, upon determining to prohibit UE2 from accessing the serving cell, UE1 sends a unicast connection rejection to UE 2.

Wherein the unicast connection rejection is for rejecting establishment of a unicast connection between the UE1 and the UE 2. In an example, the connection rejection cause value in the unicast connection rejection may be a barring access cell.

S4162, the UE2 reselects the relay terminal.

In the embodiment of the present application, after S4121-B, if the RAN determines that the UE1 does not support the relay terminal as the UE2, the RAN may send a second RRC connection rejection to the UE1, and the connection rejection cause value in the second RRC connection rejection may be, for example, that the relay is not supported. Thereafter, if the UE1 has not sent S4112 to the UE2, the UE1 may send a unicast connection rejection to the UE2, wherein a connection rejection cause value in the unicast connection rejection may be, for example, that relay is not supported; if the UE1 has sent S4112 to the UE2, the UE1 may send a unicast connection release to the UE2, where the connection release cause value of the unicast connection release may be, for example, relay not supported. The UE1 may perform the step of reselecting the relay terminal after receiving a unicast connection release or a unicast connection rejection.

In this way, the UE1 can obtain the access parameters of the UE2 in the unicast connection establishment request and determine whether to allow the UE2 to access the serving cell, and then can send the unicast connection response for establishing the sidelink unicast connection only when the UE2 is allowed to access the serving cell, so that unnecessary message transmission during the unicast connection phase can be avoided, and the load of the cell and the load of the sidelink and the UE1 can be reduced.

Fig. 4B is a schematic processing flow diagram of an access control method according to an embodiment of the present application. As shown in fig. 4B, the steps of the embodiment of the present application include:

s4200, a process flow of establishing a sidelink unicast connection between the UE1 and the UE 2.

Reference may be made, inter alia, to the description of the embodiment of the second stage.

S4201, the UE2 sends a sidelink RRC message to the UE1 carrying access parameters of the UE 2.

S4202, the UE1 determines whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameter of the UE 2; and executing the step of permitting the process flow when the determination result is permit, and executing the step of prohibiting the process flow when the determination result is prohibit.

As shown in fig. 4B, the step of allowing the process flow may include:

s4211, upon determining to allow the UE2 to access the serving cell, the UE1 sends a permission indication to the UE 2.

S4221, the UE2 sends a first RRC connection setup request to the UE 1.

S4231, the UE1 sends a first RRC connection setup request to the RAN.

S4232, the RAN sends the first RRC connection setup to the UE 1.

S4222, the UE1 sends a first RRC connection setup to the UE 2.

S4223, the UE2 sends a first RRC connection complete to the UE 1.

S4233, the UE1 sends a first RRC connection setup complete to the RAN.

Optionally, if the UE1 is in an Idle state or an Inactive state when the first RRC connection establishment request is received, before S4231, the embodiment of the present application may further include the steps shown in the flow D':

s4241, upon determining that the UE2 is allowed to access the serving cell and that the UE1 is in a non-connected state, the UE1 sends a second RRC connection establishment request to the RAN.

S4242, the RAN sends the second RRC connection setup to the UE 1.

S4243, the UE1 sends a second RRC connection setup complete to the RAN.

As shown in fig. 4B, the step of prohibiting the flow of the process may include:

s4261, upon determining to prohibit the UE2 from accessing the serving cell, the UE1 sends a unicast connection release to the UE 2.

In an example, the connection release cause value in the unicast connection release may be a cell with forbidden access.

S4262, the UE2 reselects the relay terminal.

In the embodiment of the present application, after S4241, if the RAN determines that the UE1 does not support the relay terminal as the UE2, the RAN may send a second RRC connection rejection to the UE1, and a connection rejection reason value in the second RRC connection rejection may be, for example, that the relay is not supported. After that, the UE1 may send a first RRC connection rejection to the UE 2; alternatively, the UE1 ignores the first RRC connection establishment request, and sends a unicast connection release to the UE 2. The connection rejection cause value of the first RRC connection rejection may be, for example, that relay is not supported, and the connection release cause value in the unicast connection release may be, for example, that relay is not supported. After receiving the unicast connection release or the rejection of the first RRC connection, the UE1 may release the resources related to the sidelink unicast connection, and then perform the steps related to reselecting the relay terminal.

In this way, the UE1 obtains the access parameters of the UE2 in the side link RRC message after the unicast connection is established, and determines whether to allow the UE2 to access the serving cell, and then may send a permission indication only when the UE2 is allowed to access the serving cell, so as to instruct the UE2 to send an RRC connection establishment request, which may avoid unnecessary message transmission during the RRC connection establishment phase, and may reduce the load of not only the cell but also the side link and the UE 1.

Fig. 4C is a schematic processing flow diagram of an access control method according to an embodiment of the present application. As shown in fig. 4C, the steps of the embodiment of the present application may include:

s4310, establish a sidelink unicast connection between the UE1 and the UE 2.

See, among others, the description of S3110 in fig. 3B.

S4321, the UE1 sends a first RRC connection setup request carrying access parameters of the UE2 to the UE 2.

The access parameters of the UE2 may include AC and AI, for example. Optionally, PLMN information for the UE2 may also be included. In other embodiments of the present application, the UE2 may also send a first RRC connection establishment request carrying the access parameters of the UE2 to the UE1, and when the UE1 receives the first RRC connection establishment request carrying the access parameters of the UE2 sent by the UE2, the UE1 may parse the access parameters of the UE2 from the first RRC connection establishment request.

S4320, the UE1 determines whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameter of the UE 2; and executing the step of permitting the process flow when the determination result is permit, and executing the step of prohibiting the process flow when the determination result is prohibit.

When the access parameter of the UE2 includes the PLMN of the UE2, the UE1 may determine whether to allow the UE2 to access the serving cell according to the access control information of the serving cell corresponding to the PLMN information of the UE 2. Reference is made to the description relating to the first embodiment.

As shown in fig. 4C, the step of allowing the process flow may include:

s4331, upon determining that the UE2 is allowed to access the serving cell and that the UE1 is in a non-connected state, the UE1 sends a first RRC connection setup request to the RAN.

S4332, the RAN sends the first RRC connection setup to the UE 1.

S4322, the UE1 sends the first RRC connection setup to the UE 2.

S4323, the UE2 sends a first RRC connection complete to the UE 1.

S4333, the UE1 sends a first RRC connection setup complete to the RAN.

As shown in fig. 4C, the step of inhibiting the process flow may include:

s4361, upon determining to prohibit the UE2 from accessing the serving cell, sending a first RRC connection reject or prohibit indication.

S3262, the UE2 reselects the relay terminal.

Reference may be made, among other things, to the description of S3162 in fig. 3.

In this way, the UE1 obtains the access parameters of the UE2 from the RRC connection establishment request, and determines whether to allow the UE2 to access the serving cell, and then sends the RRC connection establishment request to the RAN only when the UE2 is allowed to access the serving cell, which can avoid unnecessary message transmission during the RRC connection establishment phase, and can reduce the load of not only the cell but also the sidelink and the UE 1.

Fig. 4D is a schematic processing flow diagram of an access control method according to an embodiment of the present application. As shown in fig. 4D, the steps of the embodiment of the present application may include:

s4400, the UE1 sends a first discovery message carrying access control information of a serving cell to the UE 2.

Wherein, the implementation of the access control information of the serving cell can refer to the description in the first embodiment. In this embodiment, the UE1 may also send access control information of the serving cell to the UE2 using a new physical channel, which is not limited in this application.

S4401, the UE2 determines whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameter of the UE 2; and executing the step of permitting the process flow when the determination result is permit, and executing the step of prohibiting the process flow when the determination result is prohibit.

Reference is made to the description in connection with the first embodiment.

It should be noted that, as an alternative implementation of S4400, the UE2 may send a second discovery request carrying PLMN information of the UE2 to the UE1, and the UE1 sends access control information of a serving cell corresponding to the PLMN information of the UE2 to the UE 2. Thereafter, S4401 may include: the UE2 determines whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameter of the serving cell corresponding to the PLMN information of the UE 2.

As shown in fig. 4D, the step of allowing the process flow may include:

s4411, upon determining to allow the UE2 to access the serving cell, the UE2 transmits a unicast connection establishment request.

S4412, the UE1 sends a unicast connection establishment response to the UE 2.

S4420, a process flow of establishing a first RRC connection between the UE2 and the RAN.

S4421, while the UE1 is in the unconnected state, the UE1 sends a second RRC connection setup request to the RAN.

Wherein the second RRC connection establishment request is for requesting establishment of an RRC connection between the UE1 and the RAN. The second RRC connection establishment request may carry a connection establishment cause value, which may be used to indicate that the current RRC connection of the UE1 is used as a relay terminal to help the UE2 access the RAN. Illustratively, the cause value may be relay (relay).

S4422, the RAN sends a second RRC connection setup to the UE 1.

S4423, the UE1 sends a second RRC connection setup complete to the RAN.

It should be noted that the steps shown in the above flow D may be executed before S4412, or may be executed after S4412. In some scenarios, the UE1 may also perform S4421 and S4412 simultaneously.

As shown in fig. 4D, the step of prohibiting the process flow may include:

s4461, reselecting the relay terminal when determining to prohibit the UE2 from accessing the serving cell.

In the embodiment of the present application, after S4421, if the RAN determines that the UE1 does not support the relay terminal as the UE2, the RAN may send a second RRC connection rejection to the UE1, and the connection rejection cause value in the second RRC connection rejection may be, for example, that the relay is not supported. Thereafter, if the UE1 has not sent S4412 to the UE2, the UE1 may send a unicast connection rejection to the UE2, wherein the connection rejection cause value in the unicast connection rejection may be, for example, no relay support; if the UE1 has sent S4412 to the UE2, the UE1 may send a unicast connection release to the UE2, where the connection release cause value for the unicast connection release may be, for example, relay not supported. The UE1 may perform the step of reselecting the relay terminal after receiving a unicast connection release or a unicast connection rejection.

In this way, the UE2 obtains the access control information of the serving cell during the discovery process, and determines whether to allow the UE2 to access the serving cell, and then can send the unicast connection establishment request only when the UE2 is allowed to access the serving cell, which can avoid unnecessary message transmission during establishment of the unicast connection and RRC connection establishment phase, and can reduce the load of the cell as well as the load of the sidelink and the UE 1.

Fig. 4E is a fourth schematic processing flow diagram of the access control method according to the embodiment of the present application.

S4510, the UE2 sends a unicast connection establishment request to the UE 1.

S4511, the UE1 sends a unicast connection setup response to the UE 2.

S4512, the UE2 sends a sidelink RRC message carrying an information acquisition indication to the UE 1.

Wherein the information acquisition indication may be used to instruct the UE1 to transmit access control information of the serving cell to the UE 2. In an example, the information acquisition indication may be PLMN information for the UE 2. The PLMN information of the UE2 is used to instruct the UE1 to send access control information of a serving cell corresponding to the PLMN information of the UE2 to the UE 2. In the embodiment of the present application, for example, the UE2 may wait for the UE1 to perform S4514 after performing S4512, and then perform sending the RRC connection establishment request after determining to allow itself to access the serving cell.

It should be noted that S4512 is not a step that must be executed in the embodiment of the present application. In another example, the UE2 may also send the information acquisition indication or the PLMN information of the UE2 through the unicast connection establishment request, that is, step S4510 may include: the UE2 sends a unicast connection establishment request to the UE1 carrying the information acquisition indication or PLMN information for the UE 2.

S4514, the UE1 sends a sidelink RRC message to the UE2 carrying access control information for the serving cell.

It should be noted that, when the unicast connection establishment request carries PLMN information of the UE2 or the UE2 sends a sidelink RRC message carrying PLMN information of the UE2 to the UE1, the UE1 may send access control information of a serving cell corresponding to the PLMN information of the UE2 to the UE 2.

S4515, the UE2 determines whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameter of the UE 2; when the determination result is permission, the permission processing flow is executed, and when the determination result is prohibition, the prohibition processing flow is executed.

Reference is made to the description in connection with the first embodiment.

As shown in fig. 4E, the step of allowing the process flow may include:

in an alternative embodiment, after S4510, the step of the UE2 obtaining the determination result to allow the process flow may include:

s4521, upon determining to allow the UE2 to access the serving cell, the UE2 sends a first RRC connection setup request to the UE 1.

S4531, the UE1 sends a first RRC connection setup request to the RAN.

S4532, the RAN sends the first RRC connection setup to the UE 1.

S4522, the UE1 sends a first RRC connection setup to the UE 2.

S4523, the UE2 sends a first RRC connection complete to the UE 1.

S4533, the UE1 sends a first RRC connection setup complete to the RAN.

The steps S4531-S4533 may be implemented by the steps performed by the UE1, the UE2, and the RAN in the third phase.

s4541, while the UE1 is in the unconnected state, the UE1 sends a second RRC connection setup request to the RAN.

S4542, the RAN sends the second RRC connection setup to the UE 1.

S4543, the UE1 sends a second RRC connection setup complete to the RAN.

It should be noted that the steps shown in the above flow D may be executed before S4522.

In another embodiment, as shown in fig. 3A, after S4510, the step of prohibiting the process flow after the UE2 obtains the determination result may include:

s4561, upon determining to prohibit the UE2 from accessing the serving cell, the UE2 sends a unicast connection release to the UE 1.

S4562, upon determining to prohibit the UE2 from accessing the serving cell, the UE2 reselects the relay terminal.

Wherein, step S4562 is an optional step, and can refer to the description in S3061.

In the embodiment of the present application, after S4541, if the RAN determines that the UE1 does not support the relay terminal as the UE2, the RAN may send a second RRC connection rejection to the UE1, and a connection rejection cause value in the second RRC connection rejection may be, for example, that the relay is not supported. After that, the UE1 may send a first RRC connection rejection to the UE 2; alternatively, the UE1 ignores the first RRC connection establishment request, and sends a unicast connection release to the UE 2. The connection rejection cause value of the first RRC connection rejection may be, for example, that relay is not supported, and the connection release cause value in the unicast connection release may be, for example, that relay is not supported. After receiving the unicast connection release or the rejection of the first RRC connection, the UE1 may release the resources related to the sidelink unicast connection, and then perform the steps related to reselecting the relay terminal.

In this way, the UE2 obtains the access control information of the serving cell during the unicast connection establishment phase or by using the side link RRC message, and determines whether to allow the UE2 to access the serving cell, and then sends the RRC connection establishment request only when the UE2 is allowed to access the serving cell, so that unnecessary message transmission during the RRC connection establishment phase can be avoided, and not only the load of the cell but also the load of the side link and the UE1 can be reduced.

Other technical scheme details and technical effects of the embodiments of the present application can be referred to the descriptions in other embodiments of the present application.

EXAMPLE five

The embodiment of the present application provides a communication apparatus, which may be an access control apparatus applied to a UE1 or a UE 2. The following is an exemplary description of an access control apparatus provided in an embodiment of the present application.

Fig. 5 is a first schematic structural diagram of an access control apparatus according to an embodiment of the present application. As shown in fig. 5, the access control apparatus 500 may include: an acquisition module 501 and a sending module 502.

In this embodiment, the apparatus 500 may further include: a receiving module 503, a processing module 504 and a storage module 505. The memory module 505 may be used for storing instructions and data, among other things.

Referring to the structure shown in fig. 5, the first access control apparatus provided in the embodiment of the present application may be applied to the UE1 side, where:

an obtaining module, operable to obtain access control information of a serving cell of a first terminal UE 1;

a transmitting module operable to transmit access control information of a serving cell of a second terminal equipment UE1 to a UE 2; wherein the access control information for the serving cell is used by the UE2 to determine whether to allow the UE2 to access the serving cell based on the access control information for the serving cell and the access parameters for the UE 2.

In an optional implementation manner of the first access control apparatus, the receiving module may be configured to receive PLMN information of the UE2 sent by the UE2 before the UE1 sends access control information of a serving cell of the UE1 to the UE 2; a sending module operable to send, to the UE2, access control information of the serving cell corresponding to PLMN information of the UE 2.

In an optional implementation manner of the first access control apparatus, the sending module may be configured to send, to the UE2, a first discovery message carrying access control information of the serving cell.

In an optional implementation manner of the first access control apparatus, the receiving module may be configured to receive a second discovery request carrying PLMN information of the UE2, where the second discovery request is sent by the UE 2.

In an optional implementation manner of the first access control apparatus, the sending module may be configured to send, to the UE2, a second discovery response carrying the access control information of the serving cell.

In an optional implementation manner of the first access control apparatus, the receiving module may be configured to receive a unicast connection establishment request that is sent by the UE2 and carries PLMN information of the UE 2; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2.

In an optional implementation manner of the first access control apparatus, the sending module may be configured to send a unicast connection establishment response carrying the access control information of the serving cell to the UE 2; wherein the unicast connection establishment response is to indicate that the sidelink unicast connection establishment between the UE1 and the UE2 is complete.

In an optional implementation manner of the first access control apparatus, the receiving module may be configured to receive a second sidelink RRC message that is sent by the UE2 and carries PLMN information of the UE 2.

In an optional implementation manner of the first access control apparatus, the sending module may be configured to send, to the UE2, a first sidelink RRC message carrying access control information of the serving cell.

In an optional implementation manner of the first access control apparatus, the receiving module is configured to receive a unicast connection establishment request sent by the UE2 after the UE1 sends access control information of a serving cell of the UE1 to the UE 2; a sending module operable to send a unicast connection establishment response to the UE 2; wherein the unicast connection establishment request is transmitted by the UE2 when it is determined to allow the UE2 to access the serving cell; the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2.

In an optional implementation manner of the first access control apparatus, the receiving module is configured to receive a first RRC connection establishment request sent by the UE 2; wherein the first RRC connection setup request is for requesting establishment of an RRC connection between the UE2 and a RAN to which the serving cell belongs; a sending module operable to send the first RRC connection setup request to the RAN.

In an optional implementation manner of the first access control apparatus, the receiving module is configured to receive a first RRC connection establishment request sent by the UE2 after the UE1 sends access control information of a serving cell of the UE1 to the UE 2; wherein the first RRC connection setup request is transmitted by the UE2 when determining to allow the UE2 to access the serving cell; the first RRC connection establishment request is for requesting establishment of an RRC connection between the UE2 and a RAN to which the cell belongs; a sending module operable to send the first RRC connection setup request to the RAN.

In an alternative embodiment of the first access control device, the sending module is configured to send a second RRC connection setup request to the RAN while the UE1 is in a non-connected state before the sending of the first RRC connection setup request to the RAN; wherein the second RRC connection setup request is to request establishment of an RRC connection between the UE1 and the RAN.

In an optional implementation manner of the first access control apparatus, the connection establishment cause value in the second RRC connection establishment request is: a relay, or a connection establishment cause value in the first RRC connection establishment request.

In an optional implementation manner of the first access control apparatus, the receiving module is configured to receive a unicast connection release sent by the UE2 after the UE1 sends access control information of a serving cell of the UE1 to the UE 2; wherein the unicast connection release is transmitted by the UE2 when it is determined to prohibit the UE2 from accessing the serving cell; the unicast connection release is for requesting release of a sidelink unicast connection between the UE1 and the UE 2. In an embodiment of the application, the processing module 504 may be configured to locally release the sidelink unicast connection at the UE 1.

In an optional implementation manner of the first access control apparatus, the connection release cause value in the unicast connection release is a cell to which access is forbidden.

In an optional implementation manner of the first access control apparatus, the receiving module is configured to receive a unicast connection establishment request sent by the UE2 after the UE1 sends access control information of a serving cell of the UE1 to the UE 2; a sending module, operable to send a second RRC connection setup request to the RAN when the UE1 is in a non-connected state; wherein the second RRC connection setup request is to request establishment of an RRC connection between the UE1 and the RAN.

In an optional implementation manner of the first access control apparatus, the receiving module is configured to receive a second RRC connection rejection sent by the RAN after the sending of the second RRC connection establishment request to the RAN; a sending module operable to send a unicast connection rejection to the UE 2.

In an optional implementation manner of the first access control apparatus, the receiving module is configured to receive a first RRC connection establishment request sent by the UE2 after the UE1 sends access control information of a serving cell of the UE1 to the UE 2; wherein the first RRC connection setup request is for requesting establishment of an RRC connection between the UE2 and a RAN to which the serving cell belongs; a sending module, configured to send a second RRC connection setup request to the RAN when the UE1 is in a non-connected state; wherein the second RRC connection setup request is to request establishment of an RRC connection between the UE1 and the RAN.

In an optional implementation manner of the first access control apparatus, the receiving module is configured to receive, after the sending of the second RRC connection establishment request to the RAN, a second RRC connection rejection sent by the RAN; a processing module operable to send a unicast connection release to the UE 2.

In an optional implementation manner of the first access control apparatus, the connection rejection reason value in the unicast connection rejection is that relaying is not supported.

In an optional implementation manner of the first access control apparatus, the connection release cause value in the unicast connection release is that relaying is not supported.

In an optional implementation manner of the first access control apparatus, the connection rejection reason value in the second RRC connection rejection is that relaying is not supported.

In an optional implementation manner of the first access control device, the access parameter of the UE2 includes: access type AC and access indication AI.

In an optional implementation manner of the first access control apparatus, the receiving module may be configured to receive access control information of at least one cell sent by the RAN before the UE1 sends the access control information of the serving cell of the UE1 to the UE2, where the at least one cell includes the serving cell of the UE 1.

Fig. 6 is a schematic structural diagram of an access control apparatus according to an embodiment of the present application. As shown in fig. 6, the access control apparatus 600 may include: a sending module 602 and a receiving module 603. In this embodiment of the present application, the apparatus 600 may further include a processing module 604, an obtaining module 601, and a storing module 605. The storage module 605 may be used to store instructions and data, among other things.

Referring to the structure shown in fig. 6, the second access control apparatus provided in the embodiments of the present application may be applied to the UE2 side, where:

a receiving module, operable to receive access control information of a serving cell of a first terminal UE1 sent by a UE 1;

a processing module operable to determine whether to allow the UE2 to access the serving cell based on the access control information for the serving cell and the access parameters of the UE 2.

In this embodiment, the processing module may be further configured to execute an allowance processing procedure when it is determined that the UE2 is allowed to access the serving cell; alternatively, a barring processing procedure is performed when it is determined to bar the UE2 from accessing the serving cell.

In an optional implementation manner of the second access control apparatus, the sending module may be configured to send PLMN information of the UE2 to the UE1 before the UE2 receives access control information of a serving cell of the UE1 sent by the UE 1; a receiving module, configured to receive access control information of the serving cell corresponding to PLMN information of the UE2 sent by the UE 1.

In an optional implementation manner of the second access control apparatus, the receiving module may be configured to receive a first discovery message that is sent by the UE1 and carries access control information of a serving cell of the UE 1; a transmitting module further operable to transmit a unicast connection establishment request to the UE1 upon determining to allow the UE2 to access the serving cell; alternatively, the processing module may be configured to perform the step of reselecting the relay terminal when it is determined that the UE2 is prohibited from accessing the serving cell.

In an optional implementation manner of the second access control apparatus, the sending module may be configured to send, to the UE1, a second discovery request carrying PLMN information of the UE 2.

In an optional implementation manner of the second access control apparatus, the receiving module may be configured to receive a second discovery response sent by the UE1 and carrying access control information of a serving cell of the UE 1;

a transmitting module operable to transmit a unicast connection establishment request to the UE1 upon determining to allow the UE2 to access the serving cell, wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2; alternatively, the processing module may be configured to perform the step of reselecting the relay terminal when it is determined that the UE2 is prohibited from accessing the serving cell.

In an optional implementation manner of the second access control apparatus, the sending module may be configured to send a unicast connection establishment request carrying PLMN information of the UE2 to the UE 1; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2.

In an optional implementation manner of the second access control apparatus, the receiving module may be configured to receive a unicast connection establishment response that is sent by the UE1 and carries access control information of a serving cell of the UE1, where the unicast connection establishment response is used to indicate that establishment of a sidelink unicast connection between the UE1 and the UE2 is completed;

A transmitting module operable to transmit a first RRC connection establishment request to the UE1 when it is determined that the UE2 is allowed to access the serving cell, wherein the first RRC connection establishment request requests establishment of an RRC connection between the UE2 and the RAN; alternatively, the apparatus may include means for transmitting a unicast connection release to the UE1 upon determining to prohibit access to the serving cell by the UE2, wherein the unicast connection release is for requesting release of a sidelink unicast connection between the UE1 and the UE 2.

In an optional implementation manner of the second access control apparatus, the sending module may be configured to send, to the UE1, a second sidelink RRC message carrying PLMN information of the UE 2.

In an optional implementation manner of the second access control apparatus, the receiving module may be configured to receive a first sidelink RRC message that is sent by the UE1 and carries access control information of a serving cell of the UE 1;

accordingly, a transmitting module operable to transmit a first RRC connection establishment request to the UE1 upon determining that the UE2 is allowed to access the serving cell, wherein the first RRC connection establishment request requests establishment of an RRC connection between the UE2 and the RAN; alternatively, the apparatus may include means for transmitting a unicast connection release to the UE1 upon determining to prohibit access to the serving cell by the UE2, wherein the unicast connection release is for requesting release of a sidelink unicast connection between the UE1 and the UE 2.

In an optional implementation manner of the second access control apparatus, the receiving module is configured to receive a unicast connection establishment response sent by the UE1 after the UE2 sends the unicast connection establishment request to the UE 1; a sending module operable to send a first RRC connection setup request to the UE1, the first RRC connection setup request requesting establishment of an RRC connection between the UE2 and a RAN to which the serving cell belongs.

In an optional implementation manner of the second access control apparatus, the receiving module is configured to receive the first RRC connection setup sent by the UE1 after the sending of the first RRC connection setup request to the UE 1; a sending module operable to send a first RRC connection setup complete to the UE 1.

In an optional implementation manner of the second access control apparatus, the receiving module is configured to receive a first RRC connection rejection sent by the UE1 after the sending of the first RRC connection establishment request to the UE1, where the first RRC connection rejection is sent when the UE1 is prohibited from being used as a relay terminal; a transmitting module operable to transmit a unicast connection release to the UE1, wherein the unicast connection release is for releasing a sidelink unicast connection between the UE1 and the UE 2; and the processing module can be used for executing the step of reselecting the relay terminal.

In an optional implementation manner of the second access control apparatus, the receiving module may be configured to receive a unicast connection release sent by the UE1, where the unicast connection release is sent when the UE1 is prohibited to serve as a relay terminal, and the unicast connection release is used to release a sidelink unicast connection between the UE1 and the UE 2; and the processing module can be used for executing the step of reselecting the relay terminal.

In an optional implementation manner of the second access control apparatus, the connection release cause value in the unicast connection release is a cell to which access is prohibited.

In an optional implementation manner of the second access control apparatus, the access parameters of the UE2 include: access type AC and access indication AI.

Referring to the structure shown in fig. 5, the third access control apparatus provided in the embodiment of the present application may be applied to the UE2 side, where:

an obtaining module may be configured to obtain access parameters of the UE 2.

A sending module operable to send access parameters for the UE2 to a UE 1. Wherein the access parameters of the UE2 are to instruct the UE1 to determine whether to allow the UE2 to access the serving cell based on the access control information of the serving cell of the UE1 and the access parameters of the UE 2.

In an optional implementation of the third access control apparatus, the access parameters of the UE2 include an access type AC and an access indication AI of the UE 2.

In an optional implementation of the third access control apparatus, the access parameter of the UE2 further includes PLMN information of the UE 2; wherein the PLMN information of the UE2 is used for indicating whether to allow the UE2 to access the serving cell according to the access parameter of the UE2 and the access control information of the serving cell corresponding to the PLMN information of the UE 2.

In an optional implementation manner of the third access control apparatus, the sending module may be configured to send, to the UE1, a second discovery request carrying the access parameters of the UE 2.

In an optional implementation manner of the third access control apparatus, the sending module may be configured to send a unicast connection establishment request carrying the access parameters of the UE2 to the UE 1; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2.

In an optional implementation manner of the third access control apparatus, the sending module may be configured to send, to the UE1, a third sidelink RRC message carrying the access parameter of the UE 2.

In an optional implementation manner of the third access control apparatus, the sending module may be configured to send a first RRC connection establishment request and access parameters of the UE2 to the UE 1; or, sending a first RRC connection establishment request carrying access parameters of the UE2 to the UE 1; wherein the first RRC connection setup request is for requesting establishment of an RRC connection between the UE2 and the RAN to which the serving cell belongs.

In an optional implementation manner of the third access control apparatus, the receiving module may be configured to receive a second discovery response sent by the UE1 after the UE2 sends the access parameter of the UE2 to the UE1, where the second discovery response is sent by the UE1 when it is determined that the UE2 is allowed to access the serving cell; a sending module operable to send a unicast connection establishment request to the UE 1; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2.

In an optional implementation manner of the third access control apparatus, the receiving module may be configured to receive, after the UE2 sends the access parameter of the UE2 to the UE1, a second discovery rejection sent by the UE1, where the second discovery rejection is sent by the UE1 when it is determined that the UE2 is prohibited from accessing the serving cell.

In an optional implementation manner of the third access control apparatus, the receiving module may be configured to receive a second discovery response sent by the UE1 after the UE2 sends the access parameter of the UE2 to the UE1, where the second discovery response includes a determination result of whether to allow the UE2 to access the serving cell.

In an optional implementation manner of the third access control apparatus, the sending module may be configured to send a unicast connection establishment request to the UE1 when the determination result is that the UE2 is allowed to access the serving cell; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2; alternatively, the processing module may be configured to perform the step of reselecting the relay terminal when the determination result is that the UE2 is prohibited from accessing the serving cell.

In an optional implementation manner of the third access control apparatus, the receiving module is configured to receive a unicast connection establishment response sent by the UE1 after the UE2 sends the access parameter of the UE2 to the UE1, where the unicast connection establishment response is sent by the UE1 when determining that the UE2 is allowed to access the serving cell; a sending module operable to send a first RRC connection setup request to the UE 1; wherein the first RRC connection setup request is for requesting establishment of an RRC connection between the UE2 and the RAN to which the serving cell belongs.

In an optional implementation manner of the third access control apparatus, the receiving module may be configured to receive a unicast connection rejection sent by the UE1 after the UE2 sends the access parameter of the UE2 to the UE1, where the unicast connection rejection is sent by the UE1 when it is determined that the UE2 is prohibited from accessing the serving cell.

In an optional implementation manner of the third access control apparatus, the receiving module may be configured to receive a unicast connection establishment request response sent by the UE1 after the UE2 sends the access parameter of the UE2 to the UE1, where the unicast connection establishment response includes a determination result whether to allow the UE2 to access the serving cell.

In an optional implementation manner of the third access control apparatus, the receiving module may be configured to receive a fourth side link RRC message sent by the UE1 after the UE2 sends the access parameter of the UE2 to the UE1, where the fourth side link RRC message includes a determination result whether to allow the UE2 to access the serving cell.

In an optional implementation manner of the third access control apparatus, the sending module may be configured to send a first RRC connection establishment request to the UE1 when it is determined that the UE2 is allowed to access the serving cell; wherein the first RRC connection setup request is for requesting establishment of an RRC connection between the UE2 and a RAN to which the serving cell belongs; alternatively, the apparatus may include means for transmitting a unicast connection release to the UE1 upon determining to prohibit the UE2 from accessing the serving cell; wherein the unicast connection release is to release a sidelink unicast connection between the UE1 and the UE 2.

In an optional implementation manner of the third access control apparatus, the receiving module may be configured to receive a first RRC connection establishment sent by the UE1 after the UE2 sends the access parameter of the UE2 to the UE1, where the first RRC connection establishment is sent by the UE1 when determining that the UE2 is allowed to access the serving cell; a sending module operable to send a first RRC connection setup complete to the UE 1.

In an optional implementation manner of the third access control apparatus, after the UE2 sends the access parameter of the UE2 to the UE1, the receiving module may be configured to receive a first RRC connection rejection sent by the UE1, where the first RRC connection rejection is sent by the UE1 when determining to prohibit the UE2 from accessing the serving cell; or a receiving module, configured to receive a barring indication sent by the UE1, where the barring indication is used to indicate that the UE2 is barred from accessing the serving cell.

In an optional implementation manner of the third access control apparatus, the reject cause value in the second discovery reject is a forbidden access cell.

In an optional implementation manner of the third access control apparatus, the connection rejection reason value in the unicast connection rejection is a cell to which access is forbidden.

In an optional implementation manner of the third access control apparatus, the connection release reason value for the unicast connection release is a cell to which access is forbidden.

In an optional implementation manner of the third access control apparatus, the connection rejection reason value in the first RRC connection rejection is a cell to which access is forbidden.

In an optional implementation manner of the third access control apparatus, the receiving module may be configured to receive a unicast connection rejection sent by the UE1 after the UE2 sends the access parameter of the UE2 to the UE1, where a connection rejection reason value in the unicast connection rejection is that relay is not supported.

In an optional implementation manner of the third access control apparatus, the receiving module may be configured to receive a unicast connection release sent by the UE1 after the UE2 sends the access parameter of the UE2 to the UE1, where a reject cause value in the unicast connection release is that relay is not supported.

In an optional implementation manner of the third access control apparatus, the processing module may be configured to execute the step of reselecting the relay terminal.

Fig. 7 is a schematic structural diagram of an access control apparatus according to an embodiment of the present application. As shown in fig. 7, the access control apparatus 600 may include: a receiving module 703 and a processing module 704. In this embodiment of the present application, the apparatus 700 may further include a sending module 702, an obtaining module 701, and a storing module 705. The storage module 705 may be used to store instructions and data, among other things.

Referring to the structure shown in fig. 7, the fourth access control apparatus provided in the embodiment of the present application may be applied to the UE1 side, where:

a receiving module, configured to receive access parameters of a second terminal device UE2 for the UE 2;

a processing module operable to determine whether to allow the UE2 to access a serving cell of the UE1 based on access control information for the serving cell and access parameters of the UE 2.

In an optional implementation of the fourth access control device, the access parameters of the UE2 include the AC and AI of the UE 2.

In an optional implementation of the fourth access control apparatus, the access parameter of the UE2 includes PLMN information of the UE 2; a processing module operable to determine whether to allow the UE2 to access the serving cell according to the access control information of the serving cell corresponding to the PLMN information of the UE2 and the access parameters of the UE 2.

In an optional implementation manner of the fourth access control apparatus, the sending module may be configured to send the determination result to the UE2 after the UE1 receives the access parameter of the UE2 sent by the UE 2; wherein the determination is indicative of allowing or prohibiting the UE2 to access the serving cell. In an embodiment of the present application, the means for transmitting may be configured to transmit an indication of permission to the UE2 when it is determined that the UE2 is permitted to access the serving cell; alternatively, the apparatus may include means for transmitting a barring indication to the UE2 when it is determined to bar the UE2 from accessing the serving cell.

In an optional implementation manner of the fourth access control apparatus, the receiving module may be configured to: receiving a second discovery request carrying access parameters of the UE2 sent by the UE 2; or, receiving a unicast connection establishment request carrying the access parameters of the UE2 sent by the UE 2; or receiving a first sidelink RRC message which is sent by the UE2 and carries the access parameters of the UE 2; or receiving a first RRC connection establishment request carrying the access parameters of the UE2 and sent by the UE 2.

In an optional implementation manner of the fourth access control apparatus, the receiving module may be configured to receive a second discovery request carrying access parameters of the UE2 and sent by the UE 2; a transmitting module operable to transmit a second discovery response to the UE2 when determining to allow the UE2 to access the serving cell after the UE1 determines whether to allow the UE2 to access the serving cell based on the access control information of the serving cell of the UE1 and the access parameters of the UE 2; alternatively, upon determining to prohibit the UE2 from accessing the serving cell, sending a second discovery reject to the UE 2. In an embodiment of the present application, the second discovery response may be used to instruct the UE2 to send a unicast connection establishment request to the UE 1.

In an optional implementation manner of the fourth access control apparatus, the receiving module is configured to receive a unicast connection establishment request that is sent by the UE2 and carries the access parameter of the UE 2; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2; a sending module operable to send a unicast connection establishment response to the UE2 when determining that the UE2 is allowed to access the serving cell after the UE1 determines whether to allow the UE2 to access the serving cell based on the access control information of the serving cell of the UE1 and the access parameters of the UE 2; alternatively, sending a unicast connection rejection to the UE2 when it is determined to prohibit the UE2 from accessing the serving cell. In an embodiment of the application, the unicast connection establishment response may be used to instruct the UE2 to send a first RRC connection establishment request to the UE 1.

In an optional implementation manner of the fourth access control apparatus, the receiving module is configured to receive a third sidelink RRC message that carries the access parameter of the UE2 and is sent by the UE 2; a sending module, configured to send a fourth side link RRC message carrying the determination result to the UE 2; wherein the determination is to allow or prohibit the UE2 to access the serving cell.

In an optional implementation manner of the fourth access control apparatus, the receiving module is configured to receive a first RRC connection establishment request that is sent by the UE2 and carries access parameters of the UE 2; wherein the first RRC connection setup request is for requesting establishment of an RRC connection between the UE2 and a RAN to which the serving cell belongs; a sending module, operable to send the first RRC connection setup request to a RAN to which the serving cell belongs when it is determined that the UE2 is allowed to access the serving cell after the UE1 determines whether to allow the UE2 to access the serving cell according to the access control information of the serving cell of the UE1 and the access parameters of the UE 2; or, upon determining to prohibit the UE2 from accessing the serving cell, send a first RRC connection reject or a unicast connection release to the UE 2; wherein the unicast connection release is to release a sidelink unicast connection between the UE1 and the UE 2.

In an optional implementation manner of the fourth access control apparatus, the connection rejection reason value in the unicast connection rejection is a cell to which access is forbidden.

In an optional implementation manner of the fourth access control apparatus, the connection rejection reason value in the first RRC connection rejection is a cell to which access is forbidden.

In an optional implementation manner of the fourth access control apparatus, the sending module may be configured to send a second RRC connection establishment request to the RAN when it is determined that the UE2 is allowed to access the serving cell and the UE1 is in a non-connected state; wherein the second RRC connection setup request is to request establishment of an RRC connection between the UE1 and the RAN; a receiving module, configured to receive a second RRC connection setup sent by the RAN; the sending module may be further configured to send the first RRC connection establishment request to the RAN.

In an optional implementation manner of the fourth access control apparatus, the connection establishment cause value in the second RRC connection establishment request is a relay, or the connection establishment cause value in the first RRC connection establishment request.

Referring to the structure shown in fig. 6, a fifth access control device provided in the embodiments of the present application may be applied to the UE1 side, where:

a receiving module operable to receive access parameters of the UE2 sent by a UE 2;

a sending module operable to send a determination to a UE2 of whether to allow the UE2 access to a serving cell of the UE 1;

In an alternative embodiment of the fifth access control device, the access parameters of the UE2 include the AC and AI of the UE 2.

In an optional implementation of the fifth access control apparatus, the access parameter of the UE2 includes PLMN information of the UE 2; the determination result is obtained according to the access control information of the serving cell corresponding to the PLMN information of the UE2 and the access parameter of the UE 2.

In an optional implementation manner of the fifth access control apparatus, the receiving module may be configured to receive a second discovery request carrying access parameters of the UE2 and sent by the UE 2.

In an optional implementation manner of the fifth access control apparatus, the receiving module may be configured to receive a unicast connection establishment request that is sent by the UE2 and carries the access parameter of the UE 2.

In an optional implementation manner of the fifth access control apparatus, the receiving module may be configured to receive a third sidelink RRC message that is sent by the UE2 and carries the access parameter of the UE 2.

In an optional implementation manner of the fifth access control apparatus, the sending module may be configured to send, to the UE2, a second discovery response carrying the determination result.

In an optional implementation manner of the fifth access control apparatus, the sending module may be configured to send a unicast connection establishment response carrying the determination result to the UE 2.

In an optional implementation manner of the fifth access control apparatus, the sending module may be configured to send, to the UE2, a fourth side link RRC message carrying the determination result.

In an optional implementation manner of the fifth access control apparatus, the sending module may be configured to send a second discovery response to the UE2 when the determination result is allowed; wherein the second discovery response is used to indicate that the determination result is allowable; or, when the determination result is forbidden, sending a second discovery rejection to the UE 2; wherein the second discovery rejection is used to indicate that the determination is prohibited.

In an optional implementation manner of the fifth access control apparatus, the sending module may be configured to send a unicast connection establishment response to the UE2 when the determination result is allowed; wherein the unicast connection establishment response is used for indicating that the determination result is allowed; or, when the determination result is forbidden, sending unicast connection rejection to the UE 2; wherein the unicast connection rejection is used to indicate that the determination result is forbidden.

In an optional implementation manner of the fifth access control apparatus, the receiving module is configured to receive the first RRC connection establishment request carrying the access parameter of the UE2 sent by the UE 2; wherein the first RRC connection setup request is to request establishment of an RRC connection between the UE2 and a RAN to which a serving cell of the UE1 belongs.

In an optional implementation manner of the fifth access control apparatus, the sending module may be configured to send, to the UE2, the first RRC connection setup carrying the determination result.

Referring to the structure shown in fig. 6, a sixth access control device provided in the embodiments of the present application may be applied to the UE2 side, where:

a receiving module, configured to receive, by the second terminal device UE2, a discovery procedure message sent by the first terminal device UE 1;

a sending module operable to send a unicast connection establishment request to a UE1 when it is determined that the UE2 is allowed to access a serving cell of the UE 1; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2.

In an embodiment of the present application, the UE1 sends access control information of a serving cell of the UE1 to the UE 2; the access control information for the serving cell may be used to instruct the UE2 to determine whether to allow the UE2 to access the serving cell of the UE 1.

In an optional implementation manner of the sixth access control apparatus, the processing module may be configured to determine whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameter of the UE2 in the discovery procedure message.

In an optional implementation manner of the sixth access control apparatus, the sending module may be configured to send the access parameter of the UE2 to the UE1 before the UE2 receives the discovery procedure message sent by the UE 1; wherein the access parameter of the UE2 is to instruct the UE1 to determine whether to allow the UE2 to access the serving cell based on the access control information of the serving cell and the access parameter of the UE 2; the discovery process message received by the receiving module includes: a determination of whether to allow the UE2 access to the serving cell.

In an optional implementation manner of the sixth access control apparatus, the access parameter of the UE2 includes: access type AC and access indication AI.

In an optional implementation manner of the sixth access control apparatus, the access parameter of the UE2 includes: PLMN information of the UE 2; wherein the access parameter of the UE2 is used for indicating that the UE1 determines whether to allow the UE2 to access the serving cell according to the access control information corresponding to the PLMN information and the access parameter of the UE 2.

In an optional implementation manner of the sixth access control apparatus, the obtaining module may be configured to obtain access control information of the serving cell corresponding to PLMN information of the UE 2; a processing module operable to determine whether to allow the UE2 to access the serving cell based on the obtained access control information and the access parameters of the UE 2.

In an optional implementation manner of the sixth access control apparatus, the sending module may be configured to send PLMN information of the UE2 to the UE1 before the UE2 receives the discovery procedure message sent by the UE 1; the access control information of the serving cell received by the receiving module includes: access control information of the serving cell corresponding to PLMN information of the UE 2.

In an optional implementation manner of the sixth access control apparatus, the discovery procedure message is a first discovery message sent by the UE1 to the UE 2.

In an optional implementation manner of the sixth access control apparatus, the sending module may be configured to send, to the UE1, a second discovery request carrying PLMN information of the UE 2; the discovery process message is a second discovery response carrying access control information of the serving cell.

In an optional implementation manner of the sixth access control apparatus, the sending module may be configured to send, to the UE1, a second discovery request carrying access parameters of the UE 2; the discovery process message is a second discovery response carrying the determination result.

In an optional implementation manner of the sixth access control apparatus, the receiving module may be configured to receive a unicast connection establishment response sent by the UE 1; a sending module operable to send a first RRC connection setup request to the UE1, the first RRC connection setup request requesting establishment of an RRC connection between the UE2 and a RAN to which the serving cell belongs.

In an optional implementation manner of the sixth access control apparatus, the obtaining module may be configured to obtain a cause value for establishing an RRC connection between the UE2 and the RAN before the sending of the unicast connection establishment request to the UE 1; the unicast connection establishment request includes the cause value for establishing the RRC connection between the UE2 and the RAN.

In an optional implementation manner of the sixth access control apparatus, the processing module may be configured to perform the step of reselecting the relay terminal when it is determined that the UE2 is prohibited from accessing the serving cell.

Referring to the structure shown in fig. 7, a seventh access control device provided in the embodiments of the present application may be applied to the UE2 side, where:

a receiving module, configured to receive a discovery procedure message sent by the UE 1;

a processing module operable to perform the step of reselecting a relay terminal when it is determined that the UE2 is prohibited from accessing the serving cell of the UE 1.

In an optional implementation manner of the seventh access control apparatus, the access parameters of the UE2 include an access type AC and an access indication AI of the UE 2.

In an optional implementation of the seventh access control apparatus, the access parameter of the UE2 includes PLMN information of the UE 2; wherein the PLMN information of the UE2 is used to instruct the UE1 to determine whether to allow the UE2 to access the serving cell according to the access parameter of the UE2 and the access control information of the serving cell corresponding to the PLMN information of the UE 2.

In an optional implementation manner of the seventh access control apparatus, the sending module may be configured to send, to the UE1, a second discovery request carrying access parameters of the UE 2.

In an optional implementation manner of the seventh access control apparatus, the sending module may be configured to send a unicast connection establishment request carrying the access parameters of the UE2 to the UE 1; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2.

In an optional implementation manner of the seventh access control apparatus, the sending module may be configured to send, to the UE1, a third sidelink RRC message carrying the access parameter of the UE 2.

In an optional implementation manner of the seventh access control apparatus, the sending module may be configured to send a first RRC connection establishment request and access parameters of the UE2 to the UE 1; or, sending a first RRC connection establishment request carrying access parameters of the UE2 to the UE 1; wherein the first RRC connection setup request is for requesting establishment of an RRC connection between the UE2 and the RAN to which the serving cell belongs.

In an optional implementation manner of the seventh access control apparatus, the receiving module is configured to receive a second discovery response sent by the UE1 after the UE2 sends the access parameter of the UE2 to the UE1, where the second discovery response is sent by the UE1 when determining that the UE2 is allowed to access the serving cell; a sending module operable to send a unicast connection establishment request to the UE 1; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2.

In an optional implementation manner of the seventh access control apparatus, the receiving module may be configured to receive, after the UE2 sends the access parameter of the UE2 to the UE1, a second discovery rejection sent by the UE1, where the second discovery rejection is sent by the UE1 when it is determined that the UE2 is prohibited from accessing the serving cell. In the embodiment of the present application, the processing module executes a step of reselecting the relay terminal, and instructs the sending module to send the second discovery request in a broadcast manner; or, instruct the receiving module to receive the first discovery message sent by the UE other than the UE 1.

Referring to the structure shown in fig. 6, the eighth access control apparatus provided in the embodiments of the present application may be applied to the UE2 side, where:

a receiving module, configured to receive a unicast connection establishment response sent by the UE 1;

a transmitting module operable to transmit a first RRC connection setup request to the UE1 when it is determined that the UE2 is allowed to access a serving cell of the UE 1; wherein the first RRC connection setup request is for requesting establishment of an RRC connection between the UE2 and the RAN to which the serving cell belongs.

In an optional implementation manner of the eighth access control apparatus, the unicast connection establishment response includes: access control information of the serving cell; a processing module operable to determine whether to allow the UE2 to access the serving cell based on the access control information for the serving cell and the access parameters of the UE2 after the UE2 receives the unicast connection establishment response sent by the UE 1.

In an optional implementation manner of the eighth access control apparatus, the sending module may be configured to send, to the UE1, a unicast connection establishment request carrying the access parameters of the UE2 before the UE2 receives the unicast connection establishment response sent by the UE 1; wherein the access parameter of the UE2 is to instruct the UE1 to determine whether to allow the UE2 to access the serving cell based on the access control information of the serving cell and the access parameter of the UE 2; the unicast connection establishment response includes: a determination of whether to allow the UE2 access to the serving cell.

In an optional implementation manner of the eighth access control apparatus, the sending module may be configured to send a second sidelink RRC message to the UE1 after the UE2 receives the unicast connection establishment response sent by the UE 1; wherein the second sidelink RRC message is used for requesting access control information; a receiving module, configured to receive a first sidelink RRC message that is sent by the UE1 and carries access control information of the serving cell; a processing module operable to determine whether to allow the UE2 to access the serving cell based on the access control information for the serving cell and the access parameters of the UE 2. In an embodiment of the present application, the second sidelink RRC message may include an access control information request identity or PLMN information of the UE 2.

In an optional implementation manner of the eighth access control apparatus, the sending module may be configured to send, to the UE1, a third sidelink RRC message carrying access parameters of the UE2 after the UE2 receives the unicast connection establishment response sent by the UE 1; wherein the access parameter of the UE2 is to indicate that the UE1 determines whether to allow the UE2 to access the serving cell based on the access parameter of the UE2 and the access control information of the serving cell; a receiving module, configured to receive a fourth side link RRC message carrying the determination result sent by the UE 1.

In an optional implementation manner of the eighth access control apparatus, the access parameter of the UE2 includes: PLMN information of the UE 2; wherein the access parameter of the UE2 is used for indicating that the UE1 determines whether to allow the UE2 to access the serving cell according to the access control information corresponding to the PLMN information and the access parameter of the UE 2.

In an optional implementation manner of the eighth access control apparatus, the obtaining module may be configured to obtain access control information of the serving cell corresponding to PLMN information of the UE 2; a processing module operable to determine whether to allow the UE2 to access the serving cell based on the obtained access control information and the access parameters of the UE 2.

In an optional implementation manner of the eighth access control apparatus, the sending module may be configured to send PLMN information of the UE2 to the UE1 before the UE2 receives a unicast connection establishment response sent by the UE 1; the access control information of the serving cell includes: access control information of the serving cell corresponding to PLMN information of the UE 2.

In an optional implementation manner of the eighth access control apparatus, the sending module may be configured to send a unicast connection establishment request carrying PLMN information of the UE2 to the UE 1.

In an optional implementation manner of the eighth access control apparatus, the second sidelink RRC message includes PLMN information of the UE 2; the access control information of the serving cell includes: access control information of the serving cell corresponding to PLMN information of the UE 2.

In an optional implementation manner of the eighth access control apparatus, the sending module may be configured to send a unicast connection release to the UE1 when it is determined that the UE2 is prohibited from accessing the serving cell, or the processing module may be configured to perform a step of reselecting a relay terminal. Wherein the unicast connection release is to release a sidelink unicast connection between the UE1 and the UE 2.

In an optional implementation manner of the eighth access control apparatus, the release cause value in the unicast connection release is a cell to which access is prohibited.

In an optional implementation manner of the eighth access control apparatus, the access parameter of the UE2 includes: access type AC and access indication AI.

Referring to the structure shown in fig. 6, a ninth access control apparatus provided in the embodiments of the present application may be applied to the UE2 side, where:

a sending module operable to send a unicast connection release to the UE1 when it is determined to prohibit the UE2 from accessing a serving cell of the UE 1; wherein the unicast connection release is to release a sidelink unicast connection between the UE2 and the UE 1.

In an optional implementation manner of the ninth access control apparatus, the unicast connection establishment response includes: access control information of the serving cell; a processing module operable to determine whether to allow the UE2 to access the serving cell based on the access control information for the serving cell and the access parameters of the UE2 after the UE2 receives the unicast connection establishment response sent by the UE 1.

In an optional implementation manner of the ninth access control apparatus, the sending module may be configured to send, to the UE1, a unicast connection establishment request carrying the access parameters of the UE2 before receiving the unicast connection establishment response sent by the UE 1; wherein the access parameter of the UE2 is to instruct the UE1 to determine whether to allow the UE2 to access the serving cell based on the access control information of the serving cell and the access parameter of the UE 2; the unicast connection establishment response includes: a determination of whether to allow the UE2 access to the serving cell.

In an optional implementation manner of the ninth access control apparatus, the sending module is configured to send a second sidelink RRC message to the UE1 after receiving the unicast connection establishment response sent by the UE 1; wherein the second sidelink RRC message is used for requesting access control information; a receiving module, configured to receive a first sidelink RRC message that is sent by the UE1 and carries access control information of the serving cell; a processing module operable to determine whether to allow the UE2 to access the serving cell based on the access control information for the serving cell and the access parameters of the UE 2. In an embodiment of the present application, the second sidelink RRC message may include an access control information request identity or PLMN information of the UE 2.

In an optional implementation manner of the ninth access control apparatus, the sending module may be configured to send, to the UE1, a third sidelink RRC message carrying access parameters of the UE2 after the UE2 receives the unicast connection establishment response sent by the UE 1; wherein the access parameter of the UE2 is to indicate that the UE1 determines whether to allow the UE2 to access the serving cell based on the access parameter of the UE2 and the access control information of the serving cell; a receiving module, configured to receive a fourth side link RRC message carrying the determination result sent by the UE 1.

In an optional implementation manner of the ninth access control apparatus, the access parameters of the UE2 include: PLMN information of the UE 2; wherein the access parameter of the UE2 is used for indicating that the UE1 determines whether to allow the UE2 to access the serving cell according to the access control information corresponding to the PLMN information and the access parameter of the UE 2.

In an optional implementation manner of the ninth access control apparatus, the obtaining module may be configured to obtain access control information of the serving cell corresponding to PLMN information of the UE 2; a processing module operable to determine whether to allow the UE2 to access the serving cell based on the obtained access control information and the access parameters of the UE 2.

In an optional implementation manner of the ninth access control apparatus, the sending module may be configured to send PLMN information of the UE2 to the UE1 before the UE2 receives a unicast connection establishment response sent by the UE 1; the access control information of the serving cell includes: access control information of the serving cell corresponding to PLMN information of the UE 2.

In an optional implementation manner of the ninth access control apparatus, the sending module may be configured to send a unicast connection establishment request carrying PLMN information of the UE2 to the UE 1.

In an optional implementation manner of the ninth access control apparatus, the second sidelink RRC message includes PLMN information of the UE 2; the access control information of the serving cell includes: access control information of the serving cell corresponding to PLMN information of the UE 2.

In an optional implementation manner of the ninth access control apparatus, the sending module is configured to send a first RRC connection setup request to the UE1 when it is determined that the UE2 is allowed to access the serving cell; wherein the first RRC connection setup request is for requesting establishment of an RRC connection between the UE2 and the RAN to which the cell belongs.

In an optional implementation manner of the ninth access control apparatus, the release cause value in the unicast connection release message is a cell to which access is prohibited.

In an optional implementation manner of the ninth access control apparatus, the sending module may be configured to send, to the UE1, a first RRC connection establishment request carrying access parameters of the UE2 after the UE2 receives the unicast connection establishment response sent by the UE 1; wherein the first RRC connection setup request is for requesting establishment of an RRC connection between the UE2 and a RAN to which the cell belongs; the access parameter of the UE2 is to instruct the UE1 to determine whether to allow the UE2 to access the serving cell based on the access control information for the serving cell and the access parameter of the UE 2; a receiving module, configured to receive a first RRC connection rejection sent by the UE 1; the first RRC connection rejection is sent by the UE1 when it is determined to prohibit the UE2 from accessing the serving cell.

In an optional implementation manner of the ninth access control apparatus, the connection rejection reason value in the first RRC connection rejection is a cell to which access is forbidden.

In an optional implementation manner of the ninth access control apparatus, the processing module is further configured to execute a step of reselecting the relay terminal.

In an optional implementation manner of the ninth access control apparatus, the access parameters of the UE2 include: access type AC and access indication AI.

Referring to the structure shown in fig. 6, the tenth access control apparatus provided in the embodiments of the present application may be applied to the UE1 side, where:

a receiving module, configured to receive a unicast connection establishment request sent by UE 2;

a sending module operable to send a unicast connection establishment response to the UE2 when it is determined that the UE2 is allowed to access the serving cell of the UE 1; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2.

In an optional implementation manner of the tenth access control apparatus, the unicast connection establishment request includes an access parameter of the UE 2; a processing module operable to determine whether to allow the UE2 to access the serving cell based on the access control information for the serving cell and the access parameters of the UE2 after the UE1 receives the unicast connection establishment request sent by the UE 2.

In an optional implementation manner of the tenth access control apparatus, the receiving module may be configured to receive the access parameter of the UE2 sent by the UE2 before the UE1 receives the unicast connection establishment request sent by the UE 2; a processing module operable to determine whether to allow the UE2 to access the serving cell based on the access control information for the serving cell and the access parameters of the UE 2.

In an optional implementation of the tenth access control apparatus, the access parameter of the UE2 includes PLMN information of the UE 2; an obtaining module, configured to obtain access control information of the serving cell corresponding to PLMN information of the UE 2; a processing module operable to determine whether to allow the UE2 to access the serving cell based on the obtained access control information and the access parameters of the UE 2.

In an optional implementation manner of the tenth access control apparatus, the receiving module may be configured to receive a second discovery request carrying access parameters of the UE2 and sent by the UE 2.

In an optional implementation manner of the tenth access control apparatus, the receiving module is configured to receive a first RRC connection establishment request sent by the UE 2; a sending module, operable to send the first RRC connection establishment request to the RAN; wherein the first RRC connection setup request is for requesting establishment of an RRC connection between the UE2 and the RAN to which the serving cell belongs.

In an optional implementation manner of the tenth access control apparatus, the sending module is configured to send a second RRC connection establishment request to the RAN while the UE1 is in a non-connected state before the sending of the first RRC connection establishment request to the UE 1; wherein the second RRC connection setup request is to request establishment of an RRC connection between the UE1 and the RAN.

In an optional implementation manner of the tenth access control apparatus, the connection establishment cause value in the second RRC connection establishment request is: a relay, or a connection establishment cause value in the first RRC connection establishment request.

In an optional implementation manner of the tenth access control apparatus, the sending module may be configured to send a second RRC connection establishment request to the RAN when the UE1 is in a non-connected state; wherein the second RRC connection setup request is to request establishment of an RRC connection between the UE1 and the RAN.

In an optional implementation manner of the tenth access control apparatus, the connection establishment cause value in the second RRC connection establishment request is: a relay, or a cause value carried in the unicast connection establishment request to establish the RRC connection between the UE2 and the RAN.

In an optional implementation manner of the tenth access control apparatus, the sending module may be configured to send a unicast connection rejection to the UE2 when it is determined that the UE2 is prohibited from accessing the serving cell.

In an optional implementation manner of the tenth access control apparatus, the connection rejection reason value in the unicast connection rejection is a cell to which access is forbidden.

Referring to the structure shown in fig. 6, an eleventh access control apparatus provided in the embodiments of the present application may be applied to the UE1 side, where:

a receiving module, configured to receive a first RRC connection establishment request sent by the UE 2; the first RRC connection setup request is to request establishment of an RRC connection between the UE2 and a RAN to which a serving cell of the UE1 belongs;

a sending module operable to send the first RRC connection setup request to the RAN by the UE1 upon determining to allow the UE2 to access the serving cell.

In an optional implementation manner of the eleventh access control apparatus, the first RRC connection establishment request includes access parameters of the UE2, or the receiving module is configured to receive the first RRC connection establishment request sent by the UE2 and the access parameters of the UE 2;

a processing module operable to determine whether to allow the UE2 to access the serving cell based on the access control information for the serving cell and the access parameters of the UE2 after the UE1 receives the first RRC connection setup request sent by UE 2.

In an optional implementation manner of the eleventh access control apparatus, the receiving module may be configured to receive the access parameter of the UE2 sent by the UE2 before the UE1 receives the first RRC connection establishment request sent by the UE 2; a processing module operable to determine whether to allow the UE2 to access the serving cell based on the access control information for the serving cell and the access parameters of the UE 2.

In an optional implementation of the eleventh access control apparatus, the access parameter of the UE2 includes PLMN information of the UE 2; an obtaining module, configured to obtain access control information of the serving cell corresponding to PLMN information of the UE 2; a processing module configured to determine whether to allow the UE2 to access the serving cell according to the acquired access control information and the access parameter of the UE 2.

In an optional implementation manner of the eleventh access control apparatus, the receiving module is configured to receive a third sidelink RRC message that carries the access parameter of the UE2 and is sent by the UE 2.

In an optional implementation manner of the eleventh access control apparatus, the receiving module may be configured to receive a unicast connection establishment request sent by the UE2 before the UE1 receives the first RRC connection establishment request sent by the UE 2; a sending module operable to send a unicast connection establishment response to the UE 2; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2.

In an optional implementation manner of the eleventh access control apparatus, the sending module may be configured to send a second RRC connection establishment request to the RAN if the UE1 is in a non-connected state before the UE1 sends the first RRC connection establishment request to the RAN to which the serving cell belongs; wherein the second RRC connection setup request is to request establishment of an RRC connection between the UE1 and the RAN; a receiving module, configured to receive a second RRC connection setup sent by the RAN.

In an optional implementation manner of the eleventh access control apparatus, the connection establishment cause value in the second RRC connection establishment request is: a relay, or a connection establishment cause value in the first RRC connection establishment request.

In an optional implementation manner of the eleventh access control apparatus, the sending module may be configured to send a first RRC connection reject to the UE2 when it is determined that the UE2 is prohibited from accessing the serving cell.

In an optional implementation manner of the eleventh access control apparatus, the connection rejection reason value in the first RRC connection rejection is a cell to which access is forbidden.

Referring to the structure shown in fig. 6, a twelfth access control apparatus provided in the embodiments of the present application may be applied to the UE1 side, where:

a receiving module, configured to receive a connection indication message sent by the UE 2; wherein the connection indication message is for requesting establishment of a communication connection between the UE1 and the UE2 or for requesting establishment of a communication connection between the UE2 and a RAN to which a serving cell of the UE1 belongs;

a sending module, configured to send a second RRC connection establishment request to the RAN when the UE1 is in a non-connected state, where the second RRC connection establishment request is used to request establishment of an RRC connection between the UE1 and the RAN.

In an optional implementation manner of the twelfth access control apparatus, the connection indication message is a unicast connection establishment request; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2.

In an optional implementation manner of the twelfth access control apparatus, the connection indication message is a first RRC connection establishment request, where the first RRC connection establishment request is used to request establishment of an RRC connection between the UE2 and the RAN.

In an optional implementation manner of the twelfth access control apparatus, the sending module may be configured to send a unicast connection establishment response to the UE 2; a receiving module, configured to receive a first RRC connection establishment request sent by the UE2, where the first RRC connection establishment request is used to request establishment of an RRC connection between the UE2 and the RAN.

In an optional implementation manner of the twelfth access control apparatus, the sending module may be configured to send the first RRC connection establishment request to the RAN; a receiving module, configured to receive a first RRC connection setup sent by the RAN; a sending module, further operable to send the first RRC connection setup to the UE 2; a receiving module, further configured to receive a first RRC connection setup completion sent by the UE 2; the sending module may be further configured to send the first RRC connection setup complete to the RAN.

In an optional implementation manner of the twelfth access control apparatus, the receiving module is configured to receive a second RRC connection reject sent by the RAN; a sending module operable to send a unicast connection rejection to the UE 2.

In an optional implementation manner of the twelfth access control apparatus, the receiving module is configured to receive a second RRC connection reject sent by the RAN; a sending module operable to send a unicast connection release to the UE 2.

In an optional implementation manner of the twelfth access control apparatus, the receiving module is configured to receive that the RAN sends a second RRC connection setup after the sending of the second RRC connection setup request to the RAN to which the serving cell of the UE1 belongs; a sending module, configured to send a second RRC connection setup complete to the RAN.

In an optional implementation manner of the twelfth access control apparatus, the connection reject reason value of the second RRC connection reject is that relaying is not supported.

In an optional implementation manner of the twelfth access control apparatus, the reject reason value for the unicast connection rejection is that relaying is not supported.

In an optional implementation manner of the twelfth access control apparatus, the connection release reason value for the unicast connection release is that relaying is not supported.

In an optional implementation manner of the twelfth access control apparatus, the connection indication message includes an access parameter of the UE 2; a processing module operable to determine whether to allow the UE2 to access the serving cell based on the access control information for the serving cell and the access parameters of the UE2 after the first terminal equipment UE1 receives the connection indication message sent by the second terminal equipment UE 2; a sending module operable to send the second RRC connection setup request to the RAN upon determining that the UE2 is allowed to access the serving cell and that the UE1 is in a non-connected state.

In an optional implementation manner of the twelfth access control apparatus, the access parameters of the UE2 include an access type AC and an access indication AI of the UE 2.

Referring to the structure shown in fig. 6, a thirteenth access control device provided in the embodiments of the present application may be applied to the UE1 side, where:

a receiving module, configured to receive a unicast connection establishment request sent by UE 2; the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2;

a sending module, configured to send a second RRC connection establishment request to a RAN to which a serving cell of the UE1 belongs; the second RRC connection establishment request is for requesting establishment of an RRC connection between the UE1 and the RAN.

In an optional implementation manner of the thirteenth access control apparatus, the sending module may be configured to send, to the UE2, the access control information of the serving cell before the UE1 sends the second RRC connection establishment request to the RAN to which the serving cell belongs when the UE1 is in the non-connected state; wherein the access control information is used to instruct the UE1 to determine whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameter of the UE2, and the UE2 sends the unicast connection establishment request to the UE1 when determining to allow the UE2 to access the serving cell of the UE 1.

In an optional implementation manner of the thirteenth access control apparatus, the receiving module is configured to receive, when the UE1 is in a non-connected state, the access parameter of the UE2 sent by the UE2 before the UE1 sends a second RRC connection establishment request to the RAN to which the serving cell belongs; determining whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameters of the UE 2; a sending module operable to send a second RRC connection setup request to a RAN to which the serving cell belongs by the UE1 when it is determined that the UE2 is allowed to access the serving cell.

In an optional implementation manner of the thirteenth access control apparatus, the sending module may be configured to send a unicast connection establishment response to the UE 2; a receiving module, configured to receive a first RRC connection establishment request sent by the UE 2; the first RRC connection establishment request is for requesting establishment of an RRC connection between the UE1 and a RAN to which the cell belongs; the sending module may be further configured to send the first RRC connection establishment request to the RAN.

In an optional implementation manner of the thirteenth access control apparatus, the receiving module is configured to receive a second RRC setup message sent by the RAN; a sending module operable to send a unicast connection establishment response to the UE 2.

In an optional implementation manner of the thirteenth access control apparatus, the receiving module is configured to receive a second RRC connection rejection sent by the RAN, where the second RRC connection rejection is used to indicate that the RRC connection between the UE1 and the RAN is rejected to be established; a sending module operable to send a unicast connection rejection to the UE 2.

In an optional implementation manner of the thirteenth access control apparatus, the reject reason value in the unicast connection rejection is that relaying is not supported.

Referring to the structure shown in fig. 6, a fourteenth access control apparatus provided in the embodiments of the present application may be applied to the UE1 side, where:

a receiving module, configured to receive a first RRC connection establishment request sent by the UE 2; wherein the first RRC connection setup request is to request establishment of an RRC connection between the UE2 and a RAN to which a serving cell of the UE1 belongs;

a sending module, operable to send a second RRC connection setup request to the RAN when the UE1 is in a non-connected state; wherein the second RRC connection setup request is to request establishment of an RRC connection between the UE1 and the RAN.

In an optional implementation manner of the fourteenth access control apparatus, the sending module may be configured to send the second RRC connection establishment request to the RAN when the UE1 is in a non-connected state and it is determined that the UE2 is allowed to access a serving cell of the UE 1.

In an optional implementation manner of the fourteenth access control apparatus, the first RRC connection setup request includes: access parameters of the UE 2; a processing module operable to determine whether to allow the UE2 to access the serving cell based on the access control information for the serving cell and the access parameters of the UE2 after the UE1 receives a first RRC connection setup request sent by a UE 2.

In an optional implementation manner of the fourteenth access control apparatus, the receiving module may be configured to receive the access parameter of the UE2 sent by the UE2 before the UE1 receives the first RRC connection establishment request sent by the UE 2; a processing module operable to determine whether to allow the UE2 to access the serving cell based on the access control information for the serving cell and the access parameters of the UE 2.

In an optional implementation manner of the fourteenth access control apparatus, the receiving module may be configured to receive the access parameter of the UE2 sent by the UE2 before the UE1 receives the first RRC connection establishment request sent by the UE 2; a processing module operable to determine whether to allow the UE2 to access the serving cell based on the access control information for the serving cell and the access parameters of the UE 2; a sending module operable to send the determination to the UE 2.

In an optional implementation manner of the fourteenth access control apparatus, the sending module may be configured to send the access control information of the serving cell to the UE2 before the UE1 receives the first RRC connection establishment request sent by the UE 2; wherein the access control information for the serving cell is to instruct the UE2 to determine whether to allow the UE2 to access the serving cell according to the access control information for the serving cell and the access parameters of the UE 2.

In an optional implementation manner of the fourteenth access control apparatus, the access parameter of the UE2 includes PLMN information of the UE 2; an obtaining module, configured to obtain access control information of the serving cell corresponding to PLMN information of the UE 2; a processing module operable to determine whether to allow the UE2 to access the serving cell based on the obtained access control information and the access parameters of the UE 2.

In an optional implementation manner of the fourteenth access control apparatus, the receiving module may be configured to receive PLMN information of the UE2 sent by the UE2 before sending the access control information of the serving cell to the UE 2; a sending module operable to send, to the UE2, access control information of the serving cell corresponding to PLMN information of the UE 2.

In an optional implementation manner of the fourteenth access control apparatus, the sending module may be configured to send a unicast connection establishment response carrying the access control information of the serving cell to the UE 2.

In an optional implementation manner of the fourteenth access control apparatus, the receiving module may be configured to receive a second sidelink RRC message sent by the UE2, where the second sidelink RRC message includes access control information of the serving cell corresponding to PLMN information of the UE 2; a sending module operable to send a first sidelink RRC message to the UE2, the first sidelink RRC message including access control information of the serving cell corresponding to PLMN information of the UE 2.

In an optional implementation manner of the fourteenth access control apparatus, the receiving module may be configured to receive a unicast connection establishment request that is sent by the UE2 and carries the access parameter of the UE 2; a sending module, configured to send a unicast connection establishment response carrying the determination result to the UE 2.

In an optional implementation manner of the fourteenth access control apparatus, the receiving module is configured to receive a third side link RRC message that is sent by the UE2 and carries access parameters of the UE 2; a sending module, configured to send a fourth side link RRC message carrying the determination result to the UE 2.

In an optional implementation manner of the fourteenth access control apparatus, the receiving module may be configured to receive a unicast connection establishment request sent by the UE2 before the UE1 receives the RRC connection establishment request sent by the UE 2; a sending module operable to send a unicast connection establishment response to the UE 2; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2.

In an optional implementation manner of the fourteenth access control apparatus, the connection establishment cause value in the second RRC connection establishment request is: a relay, or a connection establishment cause value in the first RRC connection establishment request.

In an optional implementation manner of the fourteenth access control apparatus, the receiving module is configured to receive, after sending the second RRC connection establishment request to the RAN, the second RRC connection establishment sent by the RAN; a sending module, configured to send a second RRC connection setup complete to the RAN; and sending the first RRC connection establishment request to the RAN.

In an optional implementation manner of the fourteenth access control apparatus, the receiving module is configured to receive the first RRC connection setup sent by the RAN after the sending of the first RRC connection setup request to the RAN; a sending module operable to send the first RRC connection setup to the UE 2; a receiving module, further configured to receive a first RRC connection setup completion sent by the UE 2; the sending module may be further configured to send the first RRC connection setup complete to the RAN.

Referring to the structure shown in fig. 6, a fifteenth access control apparatus provided in the embodiment of the present application may be applied to the UE1 side, where:

a receiving module, configured to receive a unicast connection establishment request sent by UE 2; the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2; the unicast connection establishment request is sent by the UE2 when it is determined to allow the UE2 access to the serving cell of the UE 1;

A sending module operable to send a unicast connection establishment response to the UE 2.

In an optional implementation manner of the fifteenth access control apparatus, the receiving module may be configured to receive the access parameter of the UE2 sent by the UE2 before the UE1 receives the unicast connection establishment request sent by the UE 2; a processing module operable to determine whether to allow the UE2 to access the serving cell based on the access control information for the serving cell and the access parameters of the UE 2; a sending module operable to send the determination to the UE 2.

In an optional implementation manner of the fifteenth access control apparatus, the sending module may be configured to send the access control information of the serving cell to the UE2 before the UE1 receives the unicast connection establishment request sent by the UE 2; the determination to allow the UE2 to access the serving cell is based on the access control information for the serving cell and the access parameters of the UE 2.

In an optional implementation of the fifteenth access control apparatus, the access parameters of the UE2 include a PLMN of the UE 2; an obtaining module, configured to obtain access control information of the serving cell corresponding to PLMN information of the UE 2; a processing module operable to determine whether to allow the UE2 to access the serving cell based on the obtained access control information and the access parameters of the UE 2.

In an optional implementation manner of the fifteenth access control apparatus, the sending module may be configured to send one or more pieces of access control information of the serving cell to the UE 2; the determination result of allowing the UE2 to access the serving cell is determined according to the access control information of the serving cell corresponding to the PLMN information of the UE2 and the access parameter of the UE 2.

In an optional implementation manner of the fifteenth access control apparatus, the receiving module is configured to receive PLMN information of the UE2 sent by the UE2 before sending the access control information of the serving cell to the UE 2; a sending module, configured to send the access control information of the serving cell to the UE2, including: sending, to the UE2, access control information of the serving cell corresponding to PLMN information of the UE 2.

In an optional implementation manner of the fifteenth access control apparatus, the sending module may be configured to send, to the UE2, a first discovery message or a second discovery response carrying the access control information of the serving cell.

In an optional implementation manner of the fifteenth access control apparatus, the receiving module may be configured to receive a discovery request carrying PLMN information of the UE2 sent by the UE 2; a sending module, configured to send a second discovery response carrying the access control information of the serving cell to the UE 2.

In an optional implementation manner of the fifteenth access control apparatus, the receiving module may be configured to receive a second discovery request carrying access parameters of the UE2 and sent by the UE 2; a sending module, configured to send a second discovery response carrying the determination result to the UE 2.

In an optional implementation manner of the fifteenth access control apparatus, the receiving module may be configured to receive a discovery response sent by the UE2 and carrying the access parameters of the UE 2; a sending module, configured to send an indication message carrying the determination result to the UE 2. In the embodiment of the present application, the indication message is an enable indication or a disable indication.

In an optional implementation manner of the fifteenth access control apparatus, the receiving module is configured to receive the RRC connection establishment request sent by the UE2 after the UE1 sends a unicast connection establishment response to the UE 2; the RRC connection establishment request is for requesting establishment of an RRC connection between the UE2 and a RAN to which the serving cell belongs; a sending module, configured to send the RRC connection establishment request to the RAN.

In an optional implementation manner of the fifteenth access control apparatus, the receiving module is configured to receive the first RRC connection establishment request sent by the UE2 after the UE1 sends a unicast connection establishment response to the UE 2; the first RRC connection establishment request is for requesting establishment of an RRC connection between the UE2 and a RAN to which the serving cell belongs; a sending module, operable to send a second RRC connection setup request to the RAN when the UE1 is in a non-connected state; the second RRC connection establishment request is for requesting establishment of an RRC connection between the UE1 and the RAN.

In an optional implementation manner of the fifteenth access control apparatus, the connection establishment cause value in the second RRC connection establishment request is: a relay, or a connection establishment cause value in the first RRC connection establishment request.

In an optional implementation manner of the fifteenth access control apparatus, the receiving module is configured to receive a second RRC connection message sent by the RAN after the sending of the second RRC connection establishment request to the RAN; a sending module operable to send the first RRC connection setup request to the RAN. In this embodiment of the present application, before the sending the first RRC connection establishment request to the RAN, the method further includes: sending a second RRC connection setup complete message to the RAN.

In an optional implementation manner of the fifteenth access control apparatus, the receiving module is configured to receive a first RRC connection setup message sent by the RAN after the sending of the first RRC connection setup request to the RAN; a sending module operable to send the first RRC connection setup message to the UE 2; a receiving module, further configured to receive a first RRC connection setup complete message sent by the UE 2; the sending module may be further configured to send the first RRC connection setup complete message to the RAN.

Referring to the structure shown in fig. 6, a sixteenth access control apparatus provided in the embodiments of the present application may be applied to the UE1, where:

a receiving module, configured to receive an RRC connection establishment request sent by the UE 2; the RRC connection establishment request is sent by the UE2 when it is determined to allow the UE2 access to a serving cell of the UE 1;

a sending module, configured to send the RRC connection establishment request to a RAN to which the serving cell belongs; wherein the RRC connection establishment request is for requesting establishment of an RRC connection between the UE2 and the RAN.

In an optional implementation manner of the sixteenth access control apparatus, the receiving module may be configured to receive the access parameter of the UE2 sent by the UE2 before the UE1 receives the RRC connection establishment request sent by the UE 2; a processing module operable to determine whether to allow the UE2 to access the serving cell based on the access control information for the serving cell and the access parameters of the UE 2; a sending module operable to send the determination to the UE 2.

In an optional implementation manner of the sixteenth access control apparatus, the sending module may be configured to send the access control information of the serving cell to the UE2 before the UE1 receives the RRC connection establishment request sent by the UE 2; the determination to allow the UE2 to access the serving cell is based on the access control information for the serving cell and the access parameters of the UE 2.

In an optional implementation of the sixteenth access control apparatus, the access parameter of the UE2 includes a PLMN of the UE 2; an obtaining module, configured to obtain access control information of the serving cell corresponding to PLMN information of the UE 2; a processing module operable to determine whether to allow the UE2 to access the serving cell based on the obtained access control information and the access parameters of the UE 2.

In an optional implementation manner of the sixteenth access control apparatus, the sending module may be configured to send the one or more access control information of the serving cell to the UE 2; the determination to allow the UE2 to access the serving cell is determined according to the access control information of the serving cell and the access parameters of the UE2 whose corresponding PLMN information is the same as the PLMN information of the UE 2.

In an optional implementation manner of the sixteenth access control apparatus, the receiving module may be configured to receive PLMN information of the UE2 sent by the UE2 before sending the access control information of the serving cell to the UE 2; a sending module operable to send, to the UE2, access control information of the serving cell corresponding to PLMN information of the UE 2.

In an optional implementation manner of the sixteenth access control apparatus, the sending module may be configured to send a unicast connection establishment request carrying PLMN information of the UE2 to the UE 1.

In an optional implementation manner of the sixteenth access control apparatus, the sending module may be configured to send a unicast connection establishment response carrying the access control information of the serving cell to the UE 2.

In an optional implementation manner of the sixteenth access control apparatus, the sending module may be configured to send, to the UE2, a first sidelink RRC message carrying access control information of the serving cell.

In an optional implementation manner of the sixteenth access control apparatus, the receiving module may be configured to receive a unicast connection establishment request that is sent by the UE2 and carries the access parameter of the UE 2; a sending module, configured to send a unicast connection establishment response carrying the determination result to the UE 2.

In an optional implementation manner of the sixteenth access control apparatus, the receiving module is configured to receive a second sidelink RRC message that is sent by the UE2 and carries the access parameter of the UE 2; a sending module, configured to send a third sidelink RRC message carrying the determination result to the UE 2.

In an optional implementation manner of the sixteenth access control apparatus, the receiving module may be configured to receive a unicast connection establishment request sent by the UE2 before the UE1 receives the RRC connection establishment request sent by the UE 2; a sending module operable to send a unicast connection establishment response to the UE 2; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2.

With reference to the structure shown in fig. 7, a seventeenth access control device provided in the embodiments of the present application may be applied to the UE1 side, where:

a receiving module operable to receive a unicast connection release sent by a UE2, the unicast connection release for releasing a sidelink unicast connection between the UE1 and the UE2, the unicast connection release sent by the UE2 when it is determined to prohibit the UE2 from accessing the serving cell;

a processing module operable to release the unicast connection.

Referring to the structure shown in fig. 6, an eighteenth access control device provided in the embodiments of the present application may be applied to the UE2 side, where:

a sending module operable to send a unicast connection establishment request to the UE 1; wherein the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE1 and the UE 2;

A receiving module, operable by the UE2, to receive a unicast connection establishment response sent by the UE1, the unicast connection establishment response being sent by the UE1 when it is determined that the UE2 is allowed to access a serving cell of the UE 1.

In an optional implementation manner of the eighteenth access control device, the determination result of allowing the UE2 to access the serving cell of the UE1 is obtained according to the access control information of the serving cell and the access parameter of the UE 2;

a sending module, operable to send, by the UE2, the access parameters of the UE2 to the UE1 prior to the UE2 sending a unicast connection establishment request to the UE 1.

In an optional implementation manner of the eighteenth access control device, the determination result of allowing the UE2 to access the serving cell of the UE1 is obtained according to the access control information of the serving cell and the access parameter of the UE 2; the unicast connection establishment request includes access parameters for the UE 2.

In an optional implementation of the eighteenth access control device, the access parameter of the UE2 includes PLMN information of the UE 2; wherein the PLMN information of the UE2 is used for the UE1 to obtain access control information of the serving cell corresponding to the PLMN information of the UE 2; the determination that the UE2 is allowed to access the serving cell of the UE1 is obtained according to the obtained access control information of the serving cell and the access parameters of the UE 2.

In an optional implementation manner of the eighteenth access control device, the sending module may be configured to send, by the UE2, a discovery request or a discovery response carrying the access parameters of the UE2 to the UE 1.

In an optional implementation manner of the eighteenth access control device, the sending module may be configured to send a first RRC connection establishment request to the UE 1; a receiving module, configured to receive a first RRC connection setup sent by the UE 1; wherein the first RRC connection setup request is for requesting establishment of an RRC connection between the UE2 and the RAN to which the serving cell belongs.

Referring to the structure shown in fig. 6, a nineteenth access control device provided in the embodiment of the present application may be applied to the UE1 side, and includes:

a sending module, configured to send a unicast connection establishment request to a first terminal equipment UE 1; the unicast connection establishment request is for requesting establishment of a sidelink unicast connection between the UE2 and the UE 1;

a receiving module, configured to receive a unicast connection release sent by the UE 1; the unicast connection release is sent by the UE1 when it is determined to prohibit the UE2 from accessing the serving cell of the UE 1.

Referring to the structure shown in fig. 6, a twentieth access control apparatus provided in the embodiments of the present application may be applied to the UE2 side, and includes:

A sending module, operable to send an RRC connection establishment request to the first terminal device UE 1; the RRC connection establishment request is for requesting establishment of an RRC connection between the UE2 and a RAN to which a serving cell of the UE1 belongs;

a receiving module, configured to receive an RRC connection setup sent by the UE 1; the RRC connection establishment is sent by the UE1 when it is determined to allow the UE2 to access the serving cell.

Referring to the structure shown in fig. 6, a twenty-first access control device provided in an embodiment of the present application is applicable to a UE2 side, and includes:

a sending module, operable to send, by the second terminal device UE2, an RRC connection setup request to the first terminal device UE 1; the RRC connection establishment request is for requesting establishment of an RRC connection between the UE2 and a RAN to which a serving cell of the UE1 belongs;

a receiving module, configured to receive an RRC connection rejection sent by the UE 1; the RRC connection rejection is sent by the UE1 when it is determined to prohibit the UE2 from accessing the serving cell.

Wherein, the receiving module is configured to receive a unicast connection release sent by the UE 1; the unicast connection release is sent by the UE1 when it is determined to prohibit the UE2 from accessing the serving cell.

Fig. 8 is a first schematic structural diagram of a terminal device according to an embodiment of the present application. As shown in fig. 8, the apparatus 800 of the embodiment of the present application may be a terminal device or a system chip in the terminal device in the foregoing method embodiment, where the terminal device may be the UE 1. The apparatus 800 may be configured to perform some or all of the functions of the UE1 in the above-described method embodiments. The apparatus 800 may include: processor 810 and baseband circuitry 88 may also include radio frequency circuitry 840 and antenna 850, and apparatus 800 may also include memory 820. The various components of the device 800 may be coupled together by a bus 860, where the bus system 860 may include a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are designated in the figure as the bus system 860.

The processor 810 may be used to implement control of the UE1, to perform processing by the UE1 in the above-described embodiments, to perform processing involving the UE1 in the above-described method embodiments and/or other processes for the techniques described herein, to run an operating system, to manage the bus, and to execute programs or instructions stored in memory.

The baseband circuitry 88, radio frequency circuitry 840, and antennas 850 may be used to support transceiving information between the UE1 and the UE2, RAN involved in the embodiments described above to support wireless communications between the UE1 and the UE2 and between the UE1 and the RAN.

In an example, a frame to be transmitted, which is sent from the UE2 and encapsulated by a PHY layer, is received by the antenna 850, is subjected to filtering, amplification, down-conversion, digitization, and the like by the radio frequency circuit 840, is subjected to baseband processing such as decoding by the baseband circuit 88, decapsulating data according to a protocol, and the like, and is processed by the processor 810 to recover service data and signaling information carried in the frame to be transmitted, which is sent by the UE 2; in yet another example, the access control information of the cell carried by the UE1 may be processed by the processor 810, processed by the baseband circuitry 88 for baseband processing such as protocol encapsulation, encoding, etc., further processed by the rf circuitry 840 for rf processing such as analog conversion, filtering, amplification, and frequency up-conversion, and then transmitted to the UE2 via the antenna 850.

Memory 820 may be used to store program codes and data for UE1, and memory 820 may be a memory module as in fig. 5 through 7. It will be appreciated that the baseband circuitry 88, the radio frequency circuitry 840, and the antenna 850 may also be used to support the UE1 for communication with other network entities, e.g., to support the UE1 for communication with network elements on the RAN, core network side. Memory 820 is shown in fig. 8 as being separate from processor 810, however, those skilled in the art will readily appreciate that memory 820, or any portion thereof, may be located external to device 800. For example, memory 820 may comprise a transmission line, and/or a computer article separate from the wireless node, which may be accessed by processor 810 through bus interface 860. Alternatively, the memory 820, or any portion thereof, may be integrated into the processor 810, e.g., may be a cache and/or general purpose registers.

It is to be understood that fig. 8 only shows a simplified design of the UE 1. For example, in practical applications, the UE1 may include any number of transmitters, receivers, processors, memories, etc., and all first nodes that may implement the present invention are within the scope of the present invention.

It should be noted that, when serving as a receiving end, the apparatus 800 may also be configured to perform some or all of the functions of the UE2 in the foregoing method embodiments.

Fig. 9 is a schematic structural diagram of a terminal device according to an embodiment of the present application. As shown in fig. 9, an apparatus 900 of the present embodiment may be a terminal device or a system chip in the terminal device in the foregoing method embodiment, where the terminal device may be a UE 2. The apparatus 900 may be configured to perform some or all of the functionality of the UE2 in the above-described method embodiments. The apparatus 900 may include: the processor 910 and the baseband circuit 99 may further include a radio frequency circuit 940 and an antenna 950, and optionally, the apparatus 900 may further include a memory 920. The various components of the device 900 may be coupled together by a bus 960, where the bus system 960 may include a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are designated in the figure as the bus system 960.

The processor 910 may be used to implement control of the UE2, to perform processing by the UE2 in the above-described embodiments, to perform processing procedures involving the UE2 in the above-described method embodiments and/or other procedures for the techniques described herein, to run an operating system, to manage the bus, and to execute programs or instructions stored in the memory.

The baseband circuitry 99, the radio frequency circuitry 940, and the antenna 950 may be used to support transceiving information between the UE2 and the UE1 and the RAN involved in the above embodiments to support wireless communication between the UE2 and the UE1 and between the UE2 and the RAN.

In an example, a frame to be transmitted, which is sent from the UE2 and encapsulated by a PHY layer, is received by the antenna 950, and after baseband processing, such as filtering, amplification, down-conversion, and digitization, is performed by the radio frequency circuit 940, decoding is performed by the baseband circuit 99, data is decapsulated according to a protocol, and the like, and then, processing is performed by the processor 910 to recover service data and signaling information carried in the frame to be transmitted, which is sent by the UE 2; in yet another example, the access control information of the cell carried by the UE2 may be processed by the processor 910, processed by the baseband circuitry 99 according to protocols, encoded, and further processed by the rf circuitry 940 by analog conversion, filtering, amplification, and frequency up-conversion, and then transmitted to the UE1 via the antenna 950.

Memory 920 may be used to store program codes and data for UE2, and memory 920 may be a memory module in fig. 5-7. It is to be appreciated that the baseband circuitry 99, the radio frequency circuitry 940, and the antenna 950 may also be used to support the UE2 in communication with other network entities, e.g., to support the UE2 in communication with a RAN, a network element on the core network side. The memory 920 is shown in fig. 9 as being separate from the processor 910, however, those skilled in the art will readily appreciate that the memory 920, or any portion thereof, may be located external to the apparatus 900. For example, the memory 920 may include a transmission line, and/or a computer product separate from the wireless node, which may be accessed by the processor 910 via the bus interface 960. Alternatively, the memory 920, or any portion thereof, may be integrated into the processor 910, e.g., may be a cache and/or general purpose registers.

It is to be understood that fig. 9 only shows a simplified design of the UE 2. For example, in practical applications, the UE2 may include any number of transmitters, receivers, processors, memories, etc., and all UEs 2 that may implement the present invention are within the scope of the present invention.

It should be noted that, when serving as a receiving end, the apparatus 900 may also be configured to perform some or all of the functions of the UE1 in the foregoing method embodiments.

An embodiment of the present application further provides a chip system, including: a processor coupled to a memory for storing a program or instructions that, when executed by the processor, cause the system-on-chip to implement the method of any of the above method embodiments.

Optionally, the system on a chip may have one or more processors. The processor may be implemented by hardware or by software. When implemented in hardware, the processor may be a logic circuit, an integrated circuit, or the like. When implemented in software, the processor may be a general-purpose processor implemented by reading software code stored in a memory.

Optionally, the memory in the system-on-chip may also be one or more. The memory may be integrated with the processor or may be separate from the processor, which is not limited in this application. For example, the memory may be a non-transitory processor, such as a read only memory ROM, which may be integrated with the processor on the same chip or separately disposed on different chips, and the type of the memory and the arrangement of the memory and the processor are not particularly limited in this application.

The system-on-chip may be, for example, a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), a system on chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a digital signal processing circuit (DSP), a Microcontroller (MCU), a Programmable Logic Device (PLD), or other integrated chips.

It will be appreciated that the steps of the above described method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.

The embodiment of the present application further provides a computer-readable storage medium, where computer-readable instructions are stored in the computer-readable storage medium, and when the computer-readable instructions are read and executed by a computer, the computer is enabled to execute the method in any of the above method embodiments.

The embodiments of the present application further provide a computer program product, which when read and executed by a computer, causes the computer to execute the method in any of the above method embodiments.

The embodiment of the present application further provides a communication system, which includes a first network slice selection network element, a second network slice selection network element, and an access management network element. Optionally, the communication system may further include a network warehouse function network element.

It should be understood that the processor mentioned in the embodiments of the present application may be a Central Processing Unit (CPU), and may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will also be appreciated that the memory referred to in the embodiments of the application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, Synchronous Link DRAM (SLDRAM), and direct rambus RAM (DR RAM).

It should be noted that when the processor is a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, the memory (memory module) is integrated in the processor.

It should be understood that, without conflict, the embodiments and/or technical features of the embodiments described in the present application may be arbitrarily combined with each other, and the technical solutions obtained after the combination also fall within the protection scope of the present application.

The technical scheme provided by the application actually defines a group of processing methods related to the access control of the V2X layer. The purpose of access control involving the V2X layer is to determine whether to allow a remote UE to access the RAN through a relay UE. The judgment basis of the access control is the access parameters corresponding to the service triggering the access and the access control information corresponding to the cell to which the remote UE is to be accessed on the remote UE. The technical scheme provided by the application relates to the transmission mode of the access parameters and the access control information and the triggering condition of the access control. The technical scheme of this application can produce following technological effect. Firstly, the relay terminal judges the access control, and the message flow of the UU interface can be reduced. Second, the determination of access control by the remote terminal can reduce the message traffic on the PC5 interface (i.e., the message traffic on the SL link) and the load on the relay terminal. Thirdly, the relay terminal transmits the access control information of the serving cell to the remote terminal instead of transmitting the access control information of all cells in the cell system message to the remote terminal, which can reduce the message increment of the PC5 interface. And fourthly, judging access control in the discovery process can reduce the message flow in the unicast connection establishment process. And fifthly, judging access control in the unicast connection establishment process can reduce the message flow in the RRC connection establishment process. And sixthly, judging access control in the RRC connection establishment process, so that the message flow of the UU interface can be reduced.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the procedures or functions described in accordance with the present application are generated, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, digital subscriber line) or wirelessly (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk), among others.

Claims

1. An access control method, comprising:

2. The method of claim 1, wherein before the UE1 sends access control information for a serving cell of the UE1 to a UE2, the method further comprises: receiving PLMN information of the UE2 sent by the UE 2;

3. The method of claim 1, wherein the UE1 sends access control information for a serving cell of the UE1 to a UE2, comprising:

sending a first discovery message to the UE2 carrying access control information for the serving cell.

4. The method of claim 2, wherein the receiving the PLMN information of the UE2 sent by the UE2 comprises:

5. The method of any of claims 1-2 and 4, wherein the UE1 sending access control information for a serving cell of the UE1 to the UE2 comprises:

6. The method of any of claims 1, 3-5, wherein after the UE1 sends access control information for a serving cell of the UE1 to UE2, the method further comprises:

receiving a unicast connection establishment request sent by the UE 2;

sending a unicast connection establishment response to the UE 2;

7. The method of claim 6, further comprising:

Sending the first RRC connection setup request to the RAN.

8. The method according to claim 7, wherein prior to said sending said first RRC connection setup request to said RAN, said method further comprises:

9. The method of claim 8, wherein the connection establishment cause value in the second RRC connection establishment request is: a relay, or a connection establishment cause value in the first RRC connection establishment request.

10. The method of any of claims 1, 3-5, wherein after the UE1 sends access control information for a serving cell of the UE1 to UE2, the method further comprises:

receiving a unicast connection establishment request sent by the UE 2;

11. The method of claim 10, after the sending the second RRC connection setup request to the RAN, comprising:

Receiving a second RRC connection rejection sent by the RAN;

sending a unicast connection rejection to the UE 2.

12. The method of claim 11, wherein a connection rejection cause value in the unicast connection rejection is no support for relaying.

13. The method according to claim 11 or 12, wherein the connection rejection cause value in the second RRC connection rejection is that relaying is not supported.

14. The method according to any of claims 1-13, wherein the access parameters of the UE2 include: access type AC and access indication AI.

15. An access control method, comprising:

upon determining to allow the UE2 to access the serving cell of the UE1, sending a unicast connection establishment request to the UE 1;

16. The method of claim 15, wherein the discovery process message comprises: access control information of the serving cell; the method further comprises the following steps:

17. The method of claim 16, wherein the determining whether to allow the UE2 to access the serving cell according to the access control information of the serving cell and the access parameters of the UE2 comprises:

18. The method of claim 16, wherein before the UE2 receives the discovery process message sent by the UE1, the method comprises: sending PLMN information of the UE2 to the UE 1;

19. The method of claim 16 or 17, wherein the discovery process message is a first discovery message sent by the UE1 to the UE 2.

20. The method of claim 18, wherein the sending PLMN information for the UE2 to the UE1 comprises: sending a second discovery request to the UE1 carrying PLMN information of the UE 2;

21. The method according to any one of claims 15-20, further comprising:

receiving a unicast connection establishment response sent by the UE 1;

22. The method of claim 21, wherein the unicast connection establishment request comprises a connection establishment cause value for an RRC connection between the UE2 and the RAN;

prior to the sending of the unicast connection establishment request to the UE1, the method further comprises: a connection establishment cause value for the RRC connection between the UE2 and the RAN is obtained.

23. The method according to any one of claims 15-20, further comprising:

24. The method according to any of the claims 15-23, wherein the access parameters of the UE2 comprise: access type AC and access indication AI.

25. A communications apparatus, comprising: a processor coupled to a memory, the processor to execute instructions in the memory to cause the communication device to perform the method of any of claims 1-24.

26. A computer storage medium comprising a computer program which, when executed on a computer, causes the computer to perform the method of any one of claims 1-24.