WO2021197102A1

WO2021197102A1 - State transition method for user equipment (ue) in inactive state, ue and network side device

Info

Publication number: WO2021197102A1
Application number: PCT/CN2021/081909
Authority: WO
Inventors: 许萌; 傅婧; 梁靖
Original assignee: 大唐移动通信设备有限公司
Priority date: 2020-04-02
Filing date: 2021-03-19
Publication date: 2021-10-07
Also published as: CN113498221A

Abstract

The present disclosure provides a state transition method for user equipment (UE) in an inactive state, UE and a network side device. Said method comprises: receiving user plane data transmitted by UE in an inactive state; and when determining to trigger the UE to perform state transition, sending to the UE instruction information for state transition, so as to instruct the UE to perform state transition. In the present disclosure, a network side directly sends to UE instruction information for instructing the UE to perform state transition, solving the problem of how UE performs state transition in a small data transmission solution w/o RRC signalling.

Description

Method for state transition of inactive state UE, user equipment and network side equipment

Cross-references to related applications

This application requires the priority of a Chinese patent application filed with the Chinese Patent Office on April 02, 2020, the application number is 202010256391.9, and the application name is "Method for state transition of inactive UE and user terminal and network side equipment". All of them The content is incorporated in this application by reference.

Technical field

The present disclosure relates to the field of wireless communication technologies, and in particular to a method for state transition of a UE in an inactive state, user equipment, and network side equipment.

Background technique

NR R17 will introduce a small data transmission scheme, that is, when the UE (User Equipment) is in the RRC (Radio Resource Control, radio resource control) inactive state (RRC INACTIVE), if the UE has small data to send, the UE will The RRC inactive state completes small data transmission, which can prevent the UE from frequently entering the RRC connected state and reduce signaling overhead.

In the existing small data transmission scheme, the UE sends small data in the RRC inactive state in two ways, including small data transmission accompanied by RRC signaling (RRC signaling) transmission, and small data transmission without RRC signaling (that is, w/o RRC signaling). ) Small data transmission of signaling transmission. When using small data transmission accompanied by RRC signaling transmission, the UE randomly accesses the process and sends an RRC resume (RRC resume) request message to the network side along with the small data packet to be transmitted, and the network side can then follow the received RRC resume request The message looks up the context of the UE and further instructs the UE to enter the connected state, idle state or inactive state; when using w/o RRC signaling transmission of small data transmission, that is, the UE in the inactive state sends the small data packet to be transmitted for the first time. No additional RRC signaling is carried.

For the current w/o RRC signaling small data transmission scheme, because the transmission process is not accompanied by RRC signaling, and the current technology UE entering the connected state is the network side commanding the UE to enter the connected state or the idle state through the RRC process, so w/o RRC signaling There is no specific plan for how the UE performs state transition in the small data transmission scheme.

Summary of the invention

The present disclosure provides a method for state transition of a UE in an inactive state, user equipment and network side equipment, to solve the problem of how the UE performs state transition in the small data transmission scheme w/o RRC signalling, and there is no specific solution.

According to a first aspect of the embodiments of the present disclosure, there is provided a method for instructing a UE in an inactive state to perform a state transition, and the method includes:

Receiving user plane data transmitted by the UE in the inactive state;

When it is determined to trigger the UE to perform the state transition, the indication information of the state transition is sent to the UE to instruct the UE to resume signaling radio bearers (Signalling Radio Bearers, SRB) or enter the connected state or enter the idle state.

Optionally, receiving the user plane data transmitted by the UE in the inactive state includes:

Receiving the data transmitted by the UE in the inactive state that is not accompanied by RRC signaling; and/or

Receiving the user plane data transmitted by the UE in the inactive state, and the RRC signaling transmitted by the UE has not been received before receiving the user plane data.

Optionally, sending state transition indication information to the UE to instruct the UE to resume SRB or enter a connected state or enter an idle state, including one or a combination of the following:

Sending, to the UE through RRC signaling, the indication information of the state transition carrying the identity of the cell where the UE is camping on, so as to instruct the UE to enter the connected state; or

Sending, to the UE through a physical downlink control channel (Physical Downlink Control Channel, PDCCH), to the UE, indication information that carries the status transition of the cell identity where the UE is camping on, so as to instruct the UE to enter the connected state; or

Sending, to the UE through a medium access control (Medium Access Control, MAC) message, the indication information that carries the status transition of the cell identity where the UE is camping on, so as to instruct the UE to enter the connected state; or

Sending state transition indication information to the UE through RRC signaling to instruct the UE to enter the connected state or the idle state; or

Sending state transition indication information to the UE through the PDCCH to instruct the UE to resume SRB or enter the connected state or enter the idle state; or

The indication information of state transition is sent to the UE through the MAC message to instruct the UE to resume SRB or enter the connected state or enter the idle state.

Optionally, sending state transition indication information to the UE includes:

Message B (MSGB) or message 4 (MSG4) in the random access process carries indication information indicating the state transition of the UE.

Optionally, sending state transition indication information to the UE includes:

The indication information is sent through a preset PDCCH scrambled by a preset radio network temporary identifier (RNTI), or scheduling information for sending the indication information.

Optionally, before sending the instruction information or after sending the instruction information, the method further includes performing at least one of the following steps:

Reestablishing the Packet Data Convergence Protocol (PDCP) entity of the first signaling radio bearer (SRB1) that interacts with the UE and/or reestablishing the PDCP entity of the second signaling radio bearer (SRB2);

Restore the SRB1 and/or SRB2 interacting with the UE;

Recovering the data radio bearer (DRB) interacting with the UE;

Restore the stored security key and/or security algorithm of the UE.

According to a second aspect of the embodiments of the present disclosure, there is provided a method for a UE in an inactive state to perform state transition. The method includes:

Transmit user plane data to the network side;

When the receiving network side determines to trigger the state transition indication information sent by the UE to instruct the state transition, the SRB is restored or enters the connected state or enters the idle state according to the instruction information.

Optionally, transmitting user plane data to the network side includes:

Transmit data not accompanied by RRC signaling to the network side, and/or

The user plane data is transmitted to the network side, and the RRC signaling is not transmitted to the network side before the user plane data is transmitted.

Optionally, when the receiving network side determines to trigger the UE to perform the state transition, the sent state transition indication information includes one or a combination of the following:

When the receiving network side determines to trigger and instruct the UE to perform state transition, the indication information that carries the identity of the cell where the UE is camped on is sent through RRC signaling and enters the connected state; or

When the receiving network side determines to trigger and instruct the UE to perform a state transition, the indication information that carries the identity of the cell where the UE is camped on is sent through the PDCCH and enters the connected state, or resumes the SRB to enter the connected state; or

When the receiving network side determines to trigger and instruct the UE to perform state transition, the indication information that carries the identity of the cell where the UE is camped on is sent through the MAC message and enters the connected state, or resumes the SRB and enters the connected state; or

When the receiving network side determines to trigger the state transition indication information sent by the RRC signaling to instruct the UE to perform the state transition, and enters the connected state or the idle state; or

When the receiving network side determines to trigger the state transition indication information sent by the PDCCH to instruct the UE to perform state transition, and restore the SRB to enter the connected state or enter the connected state or enter the idle state; or

When the receiving network side determines to trigger the state transition indication information sent by the MAC message when the UE is instructed to perform the state transition, and restore the SRB to enter the connected state or enter the connected state or enter the idle state.

Optionally, the state transition indication information sent when the receiving network triggers the UE to perform state transition includes:

The receiving network side carries the indication information indicating the state transition through the MSGB or MSG4 in the random access process.

Optionally, when the receiving network side determines to trigger the UE to perform the state transition, the sent state transition indication information includes:

The UE monitors the preset PDCCH scrambled by the preset RNTI.

Optionally, when the receiving network side determines to trigger the UE to perform a state transition, before sending the state transition instruction information, or after instructing the UE to transition to the connected state according to the instruction information, it further includes performing at least one of the following steps:

Apply the default configuration of SRB1 and/or the default configuration of SRB2 specified in the protocol;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

Restore SRB1 and/or SRB2;

Restore DRB;

Recover the stored security keys and/or security algorithms.

Optionally, after instructing the UE to switch to the connected state according to the indication information, the method further includes performing at least one of the following steps:

Delete the stored UE inactive state context;

Use the preset RNTI as the UE identifier to interact with the network side, where the preset RNTI is the RNTI used when listening to the preset PDCCH when receiving the indication information;

Use the UE identity used before entering the inactive state as the UE identity of the UE in the cell;

The UE identity pre-configured on the network side is used as the UE identity of the UE in the cell after entering the connected state.

Optionally, transmitting user plane data to the network side includes:

Transmit user plane data to the network side through the pre-configured uplink resources of the camping cell; or

The user plane data is transmitted to the network side through the non-competitive random access resources allocated by the camping cell.

According to a third aspect of the embodiments of the present disclosure, there is provided a network-side device that instructs a UE in an inactive state to perform a state transition, including: a memory and a processor, and a computer program is stored in the memory;

The processor is used to read the program in the memory and execute:

Receiving user plane data transmitted by the UE in the inactive state;

When it is determined that the UE is triggered to perform the state transition, the indication information of the state transition is sent to the UE to instruct the UE to resume SRB or enter the connected state or enter the idle state.

Optionally, the processor is configured to receive the user plane data transmitted by the UE in the inactive state, and is specifically configured to:

Optionally, the processor is configured to send state transition indication information to the UE to instruct the UE to resume SRB or enter a connected state or enter an idle state, including one or a combination of the following:

Sending, to the UE through the PDCCH, indication information carrying the status transition of the cell identity where the UE is camping on, so as to instruct the UE to enter the connected state; or

Sending the indication information of the state transition of the cell identity where the UE is camping on to the UE through a MAC message, so as to instruct the UE to enter the connected state; or

Optionally, sending state transition indication information to the UE includes:

The MSGB or MSG4 in the random access process carries the indication information indicating the state transition of the UE.

Optionally, the processor is configured to send state transition indication information to the UE, and is specifically configured to:

The indication information is sent through the preset PDCCH scrambled by the preset RNTI, or the scheduling information of the indication information is sent.

Optionally, the processor is configured to perform at least one of the following steps before or after sending the instruction information:

Reestablishing the PDCP entity of SRB1 and/or reestablishing the PDCP entity of SRB2 that interacts with the UE;

Restore the SRB1 and/or SRB2 interacting with the UE;

Recover the DRB interacting with the UE;

Restore the stored security key and/or security algorithm of the UE.

According to a fourth aspect of the embodiments of the present disclosure, there is provided a UE in which an inactive state UE performs state transition, including: a memory and a processor, and a computer program is stored in the memory;

The processor is used to read the program in the memory and execute:

Transmit user plane data to the network side;

Optionally, the processor is used to transmit user plane data to the network side, specifically:

Transmit data not accompanied by RRC signaling to the network side, and/or

Optionally, the processor is configured to receive the state transition indication information sent when the network side determines to trigger the UE to perform the state transition, including one or a combination of the following:

Optionally, the processor is configured to receive the state transition indication information sent when the network side triggers the UE to perform the state transition, and is specifically used for:

Optionally, the processor is configured to receive the state transition indication information sent when the network side determines to trigger the UE to perform the state transition, and is specifically used for:

Monitor the preset PDCCH scrambled by the preset RNTI.

Optionally, the processor is configured to receive the state transition instruction information sent when the network side determines to trigger the UE to perform state transition, or after instructing the UE to transition to the connected state according to the instruction information, further includes performing the following At least one step:

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

Restore SRB1 and/or SRB2;

Restore DRB;

Recover the stored security keys and/or security algorithms.

Optionally, after the processor is configured to instruct the UE to switch to the connected state according to the indication information, the processor further includes performing at least one of the following steps:

Delete the stored UE inactive state context;

According to a fifth aspect of the embodiments of the present disclosure, there is provided a network-side device that instructs a UE in an inactive state to perform a state transition, and the network-side device includes:

The receiving unit is used to receive user plane data transmitted by the UE in the inactive state;

The first conversion unit is configured to send state transition indication information to the UE when determining that the UE is triggered to perform state transition, so as to instruct the UE to resume SRB or enter a connected state or enter an idle state.

According to a sixth aspect of the embodiments of the present disclosure, there is provided a UE in which a UE in an inactive state performs state transition, and the UE includes:

The transmission unit is used to transmit user plane data to the network side;

The second conversion unit is configured to receive the state transition instruction information sent when the network side determines to trigger the UE to perform state transition, and restore the SRB or enter the connected state or enter the idle state according to the instruction information.

According to a seventh aspect of the embodiments of the present disclosure, there is provided a chip, which is coupled with a memory in a user equipment, so that the chip invokes program instructions stored in the memory during operation to implement each of the above-mentioned embodiments of the present disclosure. Aspects and any possible methods involved in each aspect.

According to an eighth aspect of the embodiments of the present disclosure, a computer-readable storage medium is provided. The computer storage medium stores program instructions, which when run on a computer, cause the computer to execute the above-mentioned aspects and aspects of the embodiments of the present disclosure. Any method that may be involved.

According to a ninth aspect of the embodiments of the present disclosure, there is provided a computer program product, which when the computer program product runs on an electronic device, causes the electronic device to execute and implement the above-mentioned aspects of the embodiments of the present disclosure and any aspects involved in each aspect. One possible method.

In addition, the technical effects brought about by any one of the implementation manners of the second aspect to the ninth aspect can be referred to the technical effects brought about by the different implementation manners of the first aspect, which will not be repeated here.

Using a method for state transition of an inactive UE, user equipment, and network side equipment provided by the present disclosure has the following beneficial effects:

The present disclosure provides a method for state transition of a UE in an inactive state, user equipment and network side equipment, which can provide a w/o RRC signalling by directly sending indication information to the UE instructing the UE to perform state transition by the network side. The specific solution of the small data transmission scheme in which the UE resumes the SRB or enters the connected state or enters the idle state to solve the problem that the UE cannot perform state transition in the small data transmission w/o RRC signalling.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained from these drawings without creative labor.

FIG. 1 is a schematic diagram of a state transition system for a UE in an inactive state according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a method for state transition of a UE in an inactive state according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a method for state transition of a UE in an inactive state according to an embodiment of the disclosure;

FIG. 4 is a schematic diagram of a method for state transition of a UE in an inactive state according to an embodiment of the disclosure;

FIG. 5 is a schematic diagram of a state transition method for a UE in an inactive state according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a method for state transition of an inactive UE according to an embodiment of the disclosure;

FIG. 7 is a schematic diagram of a state transition method for a UE in an inactive state according to an embodiment of the present disclosure;

FIG. 8 is a schematic diagram of a state transition method for an inactive UE according to an embodiment of the disclosure;

FIG. 9 is a schematic diagram of a method for state transition of a UE in an inactive state according to an embodiment of the present disclosure;

FIG. 10 is a schematic diagram of a network-side device for instructing a UE in an inactive state to perform a state transition according to an embodiment of the disclosure;

FIG. 11 is a schematic diagram of a UE in which an inactive state UE performs state transition according to an embodiment of the disclosure; FIG.

FIG. 12 is a schematic diagram of a network side device for instructing a UE in an inactive state to perform a state transition according to an embodiment of the disclosure;

FIG. 13 is a schematic diagram of an inactive UE performing state transition according to an embodiment of the disclosure.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without creative work shall fall within the protection scope of the present disclosure.

The term "and/or" in the embodiments of the present disclosure describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone These three situations. The character "/" generally indicates that the associated objects before and after are in an "or" relationship.

The application scenarios described in the embodiments of the present disclosure are intended to more clearly illustrate the technical solutions of the embodiments of the present disclosure, and do not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure. Those of ordinary skill in the art will know that with the development of new application scenarios It appears that the technical solutions provided by the embodiments of the present disclosure are equally applicable to similar technical problems. Wherein, in the description of the present disclosure, unless otherwise specified, "plurality" means two or more.

The NR system has designed three RRC states: idle (RRC_IDLE) state, connected (RRC_CONNECTED) state and inactive (RRC_INACTIVE) state. Among them, in the RRC inactive state, the non-access stratum (NAS) state of the UE remains in the connected state, but the air interface connection corresponding to the access stratum (AS) of the UE temporarily hangs. Since both the UE side and the radio access network (Radio Access Network, RAN) side store the AS layer context of the UE in the inactive state, the inactive UE can be based on the UE inactive state during the process of restoring the connection to the air interface on the RAN side. Performing related connection operations in the context of the lower AS layer can effectively reduce signaling interaction and enable the UE to quickly enter the connected state.

The UE entering the connected state from the inactive state is completed through the RRC resume process. The specific process of the inactive UE entering the connected state is as follows:

First, the random access process is triggered. The UE sends an RRC resume request message to the network side. Specifically, the UE carries the above RRC resume request message through message 3 (MSG3) to request the network to resume the RRC connection of the UE. The above RRC resume request message also contains The UE identity of the UE in the inactive state enables the network side to obtain the context of the UE through the UE identity, and the network side informs the UE to enter the connected state through the RRC resume message carried in the MSG4. The UE sends a message 5 (MSG5) message carrying an RRC resume complete message to the network side to complete the RRC resume process.

The network side informs the UE from the inactive state to enter the idle state through the RRC release message. When the network determines that the inactive UE enters the idle state, it will carry the MSG4 RRC release message during the random access process triggered by the UE. Sent to the UE, when it is determined that the above message does not carry the configuration information indicating that the UE enters the inactive state, notify the UE to enter the idle state, or after the UE enters the connected state, send an RRC Release message that does not carry the configuration information to enter the inactive state. The UE enters an idle state.

In the existing small data transmission scheme, the UE sending small data in the RRC inactive state includes two methods, including small data transmission with RRC signaling transmission, and small data transmission without RRC signaling (that is, w/o RRC signaling) transmission. Data transmission method. Along with the small data transmission process of RRC signaling transmission, the UE triggers the random access process and sends the RRC resume request message together with the small data packet to be transmitted to the network side. The network side can subsequently obtain the UE’s information according to the received RRC resume request message. Context, and further instruct the UE to enter the connected state, idle state or inactive state; when using the small data transmission scheme of w/o RRC signaling transmission, that is, the UE sends the small data packet to be transmitted for the first time without carrying additional RRC messages .

For the current w/o RRC signaling small data transmission scheme, since the transmission process is not accompanied by RRC signaling transmission, and the current technology UE entering the connected state is the network side commanding the UE to enter the connected state or the idle state through the RRC process, so w/o RRC There is no specific plan for how the UE performs state transition in the small data transmission scheme of Signalling.

Based on the above-mentioned problems, the embodiments of the present disclosure provide a method for state transition of a UE in an inactive state, which is used to solve the above-mentioned problems. The specific embodiments of the present disclosure will be described below with reference to the accompanying drawings.

Example 1

In the description process, the implementation of the state transition system for the inactive UE is explained separately from the implementation of the UE and the network side, and then an example of the implementation of the two will be given to better understand the solution given in the embodiments of the present disclosure. Implementation. This way of explanation does not mean that the two must be implemented together or implemented separately. In fact, when the UE and the network are implemented separately, they also solve the problems of the UE side and the network side respectively, and when the two are used in combination, they will Get better technical results.

As shown in FIG. 1, a system for performing state transition of a UE in an inactive state according to an embodiment of the present disclosure, and the system includes:

UE 101 is configured to transmit user plane data to the network side; receive the state transition indication information sent when the network side determines to trigger the UE to perform state transition, and restore the SRB or enter the connected state or enter the idle state according to the instruction information;

The network side device 102 is configured to receive user plane data transmitted by the UE in the inactive state; when determining to trigger the UE to perform a state transition, send the state transition indication information to the UE to instruct the UE to resume SRB or enter the connected state Or enter the idle state.

In the current technology, the state transition of the UE is that the network side device commands the UE to enter the connected state or the idle state through the RRC process. However, there is no clear plan for how the UE performs state transition without using RRC signaling, such as the current small In the data transmission scheme, since the current w/o RRC signaling small data transmission scheme, the transmission process is not accompanied by RRC signaling, and the current technology UE enters the connected state when the network side device commands the UE to enter the connected state or the idle state through the RRC process, so w/o RRC signalling's small data transmission scheme has no specific plan for how the UE performs state transition. Based on this, in the embodiments of the present disclosure, the UE transmits user plane data to the network side, and the network side device receives the user of the inactive UE. In case of face data, if it is determined that the UE is triggered to perform state transition, the state transition indication information is sent to the UE to instruct the UE to resume SRB or enter the connected state or enter the idle state. , Send the instruction information of state transition, and restore the SRB or enter the connected state or enter the idle state according to the instruction information.

Optionally, the user plane data sent by the UE to the network side may include, but is not limited to, the small data mentioned in the embodiments of the present disclosure. The small data sent by the UE to the network side is small data not accompanied by RRC signaling transmission. , Except for the small data packets to be transmitted, no additional RRC messages are carried. Optionally, the UE transmits user plane data to the network side, and the RRC signaling is not transmitted to the network side before transmitting the user plane data.

Optionally, in the process of restoring the connection to the RAN side air interface, the inactive UE can perform related connection operations based on the context of the AS layer in the inactive state of the UE, which can effectively reduce signaling interaction and enable the UE to quickly enter the connected state. Therefore, in the current small data transmission scheme, the UE will perform small data transmission in the inactive state.

In the prior art, to establish a connection between the UE and the network side, the UE needs to send RRC signaling to the network side device, and the UE performs state transition. After sending the RRC signaling, determine whether to enter the connected state or the idle state according to the received response message sent by the network side device. However, in the embodiments of the present disclosure, after the UE establishes a connection with the network side device, after the UE sends small data or other data to the network side, it can be determined whether the UE performs state transition according to the instruction information sent by the network side device. Optionally, the circumstances in which the network-side device determines to trigger the transition of the UE from the inactive state to the connected state include but are not limited to that the network-side device and the UE need to transmit other data. After the UE transmits the above-mentioned user plane data to the network-side device If there is no need to transmit other data between the UE and the network-side device, the network-side device determines to trigger the UE to transition to the idle state or fall back to the inactive state.

As an optional implementation manner, the network side device may also directly send the above-mentioned indication information to the inactive state UE when it no longer receives any data from the UE, to instruct the UE to change from the inactive state. Switch to the active state, or switch from the inactive state to the idle state.

After receiving the user plane data sent by the UE, the network side device sends state transition indication information to the UE when it determines to trigger the UE to perform state transition. Optionally, the above indication information can be transmitted through RRC signaling, Medium Access Control Control Element (MAC CE), or PDCCH. For example, if the SRB is restored between the network side and the UE, including but not limited to through RRC The signaling sends the indication information of state transition to the UE to instruct the UE to perform state transition; or sends the indication information of state transition to the UE through the PDCCH to instruct the UE to perform state transition; or through the MAC message to The UE sends state transition indication information to instruct the UE to perform state transition.

Specifically, when the foregoing network side sends the indication information of state transition to the UE, or when the network side received by the UE determines to trigger the instructing the UE to perform the state transition, the state transition indication information sent includes at least one of the following:

When the inactive state UE is instructed to switch to the connected state through the above indication information, the indication information may need to carry the UE identity of the cell where the UE is camping on, and the UE identity is used as the UE after the cell enters the connected state. The unique identifier of the UE in the cell. The specific sending process includes any one or a combination of the following:

1) Send the indication information of the state transition of the cell identification of the UE in the camping cell to the UE through RRC signaling to instruct the UE to enter the connected state. Optionally, the above RRC message is an RRC resume message or a newly defined RRC message; or

2) Send the indication information of the state transition of the cell identity where the UE is camping on to the UE through the PDCCH to instruct the UE to enter the connected state; or

3) Instructing the UE to enter the connected state by sending the MAC message to the UE the indication information carrying the status transition of the UE's resident cell identity.

During specific implementation, the network side device may send any one or any combination of the foregoing to instruct the UE to enter the connected state, and the UE may also receive any one or any combination of the foregoing sent by the network side to enter the connected state.

Optionally, the network side can also send indication information to indicate that the UE enters the connected state or the idle state, or when the network side determines that the UE receives the trigger to instruct the UE to perform the state transition, it sends the indication that the UE enters the connected state or the idle state. The conversion instruction information, the specific sending process includes any one or combination of the following:

4) Send state transition indication information to the UE through RRC signaling to instruct the UE to enter the connected state or the idle state; or

5) Send the indication information of state transition to the UE through the PDCCH to instruct the UE to resume SRB or enter the connected state or enter the idle state; or

6) By sending the MAC message to the UE the indication information of state transition to instruct the UE to resume SRB or enter the connected state or enter the idle state.

Specifically, the network-side device may send indication information to the UE in the above 1) to 3) methods for instructing the UE to enter the connected state, and may also send the indication information to the UE in the above 3 methods 4) to 6). Used to instruct the UE to enter the connected state or idle state. Optionally, the indication information is sent to the UE in the above 2 ways of 5) and 6), which is used to instruct the UE to resume the SRB and enter the connected state. Of course, in a specific implementation, the network side device can send indication information to the UE through any one or any combination of the above methods. For example, the UE can be instructed to enter the connected state through the above method 1), and through the above method 6). The UE enters the idle state, or instructs the UE to resume the SRB and enter the connected state through the above method 5). Specifically, those skilled in the art can make settings based on actual requirements, and will not be repeated here.

Correspondingly, when the UE receives the state transition indication information sent when the network side determines to trigger the UE to perform the state transition, it includes any one of the following:

Specifically, SRB is a special radio bearer, which is only used to transmit RRC and NAS messages. In protocol 36.331, the transmission channel of SRBs is defined:

SRB0 is used to transmit RRC messages, which are transmitted on the Common Control Channel (CCCH);

SRB1 is used to transmit RRC messages (may include piggybacked NAS messages). It is established before the establishment of the SRB2 bearer. It has a higher priority than SRB2 and is transmitted on a dedicated control channel (Dedicated Control CHannel, DCCH);

SRB2 is used to transmit NAS messages, has a lower priority than SRB1, and always configures SRB2 after the safety mode is activated, and transmits it on the DCCH.

In the foregoing manners, the SRB recovery may be triggered when the UE transmits user plane data to the network-side device. Optionally, the SRB recovery may be triggered after the UE receives the instruction information sent by the network-side device.

As another optional implementation manner, only the network-side device may send the indication information of the state transition of the UE in the camping cell identity to the UE through RRC signaling. For example, the RRC resume message carries the cell radio network allocated for the UE. Temporary Identifier (Cell Radio Network Temporary Identifier, C-RNTI) notifies the network to enter the connected state, or when the network side device sends state transition indication information to the UE through RRC signaling, when the UE transmits user plane data to the network side device , Restore SRB to receive RRC signaling.

When the network-side device sends the foregoing indication information to the UE, it may, but is not limited to, carry the indication information for sending the state transition to the UE through MSGB or MSG4 in the random access process. Optionally, the foregoing random access process includes a contention random access process or a non-competition random access process. Correspondingly, when the UE receives a network side trigger and instructs the UE to perform a state transition, the state transition indication information sent includes the receiving network side The MSGB or MSG4 in the random access process carries the indication information indicating the state transition.

When the network-side device sends the indication information of state transition to the UE, it may, but is not limited to, send the indication information through the preset PDCCH scrambled by the preset RNTI, or send the scheduling information of the indication information, the above-mentioned preset The RNTI and/or the preset PDCCH may be configured by the network to the UE through dedicated signaling or system information broadcast. The RNTI may be a preset PDCCH dedicated RNTI, a preset PDCCH dedicated RNTI associated with a preset configured uplink resource, or a UE dedicated RNTI.

Before or after sending the above-mentioned instruction information to the UE, the network-side device further performs at least one of the following steps:

Restore the SRB1 and/or SRB2 interacting with the UE;

Recovering the DRB interacting with the UE, where the DRB is used to carry user plane data;

Restore the stored security key and/or security algorithm of the UE, where the security key and the security algorithm are used for encryption and integrity protection of DRB and SRB.

When the UE determines to trigger the state transition instructing the UE on the receiving network side, before the transmitted state transition instruction information, or after transitioning to the connected state according to the instruction information, it further includes performing at least one of the following steps:

Apply the SRB1 configuration and/or SRB2 configuration specified in the protocol;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

Restore SRB1 and/or SRB2;

Restore the data resource to bear the DRB;

Recover the stored security keys and/or security algorithms.

Optionally, any one of the above steps can be performed, including any combination. Those skilled in the art can set according to actual needs, which will not be repeated here. Specifically, the UE can determine the trigger indication on the receiving network side. When the UE performs a state transition, before the transmitted state transition instruction information, or after transitioning to the connected state according to the instruction information;

After the UE switches to the connected state according to the indication information, it further includes performing at least one of the following steps:

Delete the stored UE inactive state context;

Specifically, any of the above steps can be performed, or can be performed in any combination, and those skilled in the art can set according to actual needs, and will not be repeated here.

Optionally, the UE transmits user plane data to the network side device, including but not limited to the following two methods:

As shown in Fig. 2, the flow chart of the method for state transition of the inactive UE proposed in the embodiment of the present disclosure includes:

Step S201: The UE transmits user plane data to the network side device.

Specifically, the UE transmits user plane data to the network side device through uplink resources pre-configured in the camping cell or non-competitive random access resources allocated by the camping cell.

Step S202: The network side device receives the user plane data transmitted by the UE in the inactive state, and determines whether to trigger the UE to perform a state transition.

Step S203: When the network side device determines to trigger the UE to perform state transition, it sends the state transition indication information to the UE.

Specifically, the network side device carries the indication information to send the state transition to the UE through the MSGB or MSG4 in the random access process, or the UE receives the indication information sent by the network side device through the preset PDCCH scrambled by the preset RNTI.

Step S204, the UE enters the connected state or enters the idle state or resumes the SRB and enters the connected state according to the received instruction information of the network side device.

In the following, in conjunction with a specific transmission mode, a specific example of the network side device and the UE in this embodiment in cooperation to perform the state transition of the inactive UE is given.

Example one

The UE has pre-configured uplink resources configured on the network side in the cell where it resides. When the UE triggers w/o RRC signaling small data transmission, the network side device instructs the UE to enter the connected state through RRC signaling, as shown in Figure 3:

Step S301, the inactive UE has a pre-configured uplink resource allocated by the camping cell in the camping cell.

Step S302, the inactive UE decides to trigger w/o RRC signaling small data transmission scheme in the camping cell.

Step S303: The inactive UE sends small data to the network side device on the pre-configured uplink resource.

In step S304, the network side device receives the data sent by the UE, and determines a trigger to cause the UE to enter the connected state from the inactive state.

Step S305: The UE monitors the PDCCH scrambled by the dedicated RNTI. The RNTI may be an RNTI dedicated to the associated downlink PDCCH configured for the pre-configured uplink resource, or an RNTI configured exclusively for the UE, or an RNTI pre-configured for the UE by the network-side device, for example, the network-side configuration when entering the inactive state To the UE.

Step S306: The network side sends an RRC message to notify the UE to enter the connected state. The RRC message is an RRC resume message or a newly defined RRC message. The RRC message may contain UE identification information configured for the UE in the camping cell, such as C- The RNTI is used as the UE identity of the UE in the cell after the UE enters the connected state.

In step S307, the UE obtains the scheduling information of the RRC signaling by monitoring the PDCCH, obtains the RRC signaling, and enters the connected state according to the indication of the RRC signaling.

Step S308, the UE determines the UE identity according to any one of the following methods:

1) According to the UE identification information in the cell configured for the UE in the camping cell in the RRC message, the UE enters the connected state and uses the UE identification information as the UE identification in the cell;

2) The UE uses the above-mentioned RNTI as the UE identity of the cell where the UE resides, that is, the dedicated RNTI used in step S305;

3) The UE restores the UE identification information used before entering the inactive state as the UE identification of the camping cell;

4) The UE uses the UE identity pre-configured for the UE by the network side as the UE identity of the UE in the cell after entering the connected state. For example, when the UE enters the inactive state, the network side configures it to the UE through signaling.

Example two

The UE has non-competitive random access resources allocated by the network side in the cell where the UE resides. When the UE triggers w/o RRC signaling small data transmission, the network side device instructs the UE to enter the connected state through RRC signaling, as shown in Figure 4:

Step S401: The inactive UE has a non-contention random access resource allocated to the UE by the cell in the cell where it resides.

In step S402, the inactive UE decides to trigger a small data transmission scheme of w/o RRC signaling in the camping cell.

Step S403, the inactive UE triggers the non-contention random access process, and sends small data to the network side device during the random access process, for example, sends small data with msg3 during the 4step random access process, or 2step random access In the process, small data is sent with MSGA.

In step S404, the network side device receives the data sent by the UE, and determines the trigger to cause the UE to enter the connected state from the inactive state.

In step S405, the UE monitors the response message of the network during the random access process, such as MSG4 or MSGB.

Step S406: The network side sends an RRC message to notify the UE to enter the connected state. The RRC message is an RRC resume message or a newly defined RRC message. The RRC message may contain the UE identity information of the cell configured for the UE. For example, the C-RNTI is used for the UE to act as the UE identity of the UE in the cell after the UE enters the connected state. The RRC message is sent to the UE along with the random access process. The message may be sent to the UE along with msg4 during the random access process, for example, during the 4-step random access process, or sent to the UE along with the MSGB during the 2step random access process.

In step S407, the UE monitors the random access process, monitors the PDCCH to obtain the scheduling information of the RRC signaling, obtains the RRC signaling, and enters the connected state according to the RRC signaling instruction.

Step S408: The UE determines the UE identity according to any one of the following methods:

2) The UE restores the UE identification information used before entering the inactive state as the UE identification of the camping cell;

3) The UE uses the UE identity pre-configured by the network side for the UE as the UE identity of the UE in the cell after entering the connected state. For example, when the UE enters the inactive state, the network side configures it to the UE through signaling.

Example three

The UE has pre-configured uplink resources configured on the network side in the cell where the UE resides. When the UE triggers w/o RRC signaling small data transmission, the network side device instructs the UE to enter the connected state through a PDCCH or MAC message, as shown in Figure 5:

In step S501, the inactive UE has the pre-configured uplink resource allocated by the camping cell in the camping cell.

In step S502, the inactive UE decides to trigger a small data transmission scheme of w/o RRC signaling in the camping cell.

Step S503, the inactive UE sends small data to the network side device on the pre-configured uplink resource.

In step S504, the network side device receives the data sent by the UE, and determines a trigger to cause the UE to enter the connected state from the inactive state.

Step S505: The UE monitors the PDCCH scrambled by the dedicated RNTI. The RNTI may be an RNTI dedicated to the associated downlink PDCCH configured for the pre-configured uplink resource, or an RNTI configured exclusively for the UE, or an RNTI pre-configured for the UE by the network-side device, for example, the network-side configuration when entering the inactive state To the UE.

Step S506, the network side device sends a PDCCH order or a MAC CE message to notify the UE to enter the connected state. The PDCCH order or MAC CE message may contain the UE identification information of the cell that the UE is camping on. For example, the C-RNTI is used to serve as the UE identification of the UE in the cell after the UE enters the connected state, or it may contain instructions to instruct the UE to resume SRB or Instruction information to enter the connected state.

Step S507: The UE in the inactive state obtains the PDCCH order or MAC CE message by monitoring the PDCCH, and enters the connected state according to the PDCCH order or MAC CE message.

Step S508, the UE determines the UE identity according to any one of the following methods:

1) According to the UE identification information of the cell configured for the UE in the camping cell in the PDCCH order or MAC CE message, the UE enters the connected state and uses the UE identification information as the UE identification of the cell;

2) The UE uses the above-mentioned RNTI as the UE identity of the cell where the UE resides, that is, the dedicated RNTI used in step S505;

3) The UE restores the UE identification information used before entering the inactive state as the UE identification in the cell;

Step S509: If the PDCCH order or the MAC CE message contains the indication information for restoring the SRB indicating to restore the SRB, the UE restores the SRB according to the indication information and enters the connected state.

Example four

The UE has non-competitive random access resources allocated by the network in the cell where the UE resides. When the UE triggers w/o RRC signaling small data transmission, the network device instructs the UE to enter the connected state through a PDCCH or MAC message, as shown in Figure 6 :

In step S601, the UE in the inactive state has a non-contention random access resource allocated by the cell in the cell where it resides.

In step S602, the inactive UE decides to trigger a small data transmission scheme of w/o RRC signaling in the camping cell.

In step S603, the inactive UE triggers the non-contention random access process, and sends small data to the network side device during the random access process, for example, sends small data with msg3 during the 4step random access process, or 2step random access In the process, small data is sent with MSGA.

In step S604, the network side device receives the data sent by the UE, and determines the trigger to cause the UE to enter the connected state from the inactive state.

In step S605, the UE monitors the response message of the network during the random access process, such as MSG4 or MSGB.

In step S606, the network side sends a PDCCH order or a MAC CE message to notify the UE to enter the connected state. The PDCCH order or MAC CE message may contain the UE identification information of the cell configured for the UE. For example, the C-RNTI is used to serve as the UE identification of the UE in the cell after the UE enters the connected state, or may contain instructions for the UE to resume SRB or enter Indication information of the connected state. The PDCCH command or MAC CE message is sent to the UE along with the random access process. The message can be sent to the UE along with msg4 during the random access process, for example, in the 4step random access process, or 2step random access. In the process, the MSGB is sent to the UE along with the MSGB.

In step S607, the inactive UE monitors the random access process, monitors and obtains the PDCCH order or MAC CE message, and enters the connected state according to the PDCCH order or MAC CE message.

In step S608, the UE determines the UE identity according to any one of the following methods:

1) According to the UE identification information in the cell configured for the UE by the camping cell in the PDCCH order or MAC CE message, the UE enters the connected state and uses the UE identification information as the UE identification in the cell;

2) The UE restores the UE identification information used before entering the inactive state as the UE identification in the cell;

Step S609: If the PDCCH order or the MAC CE message contains indication information for restoring the SRB to instruct the UE to restore the SRB, the UE restores the SRB according to the indication information and enters the connected state.

Example 5: After the UE enters the connected state, perform at least one of the following:

1) Use the default SRB1 configuration and/or SRB2 configuration;

2) Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

3) Restore SRB1 and/or SRB2;

4) Restore DRB;

5) Delete the stored UE inactive context;

6) The UE continues to use the security key and/or security algorithm used when sending small data after receiving the message sent by the network side to notify the UE to enter the connected state;

7) The UE uses a dedicated RNTI as the UE identity of the cell. The RNTI is the RNTI used by the UE to monitor the PDCCH when the UE transmits small data in the inactive state;

8) The UE resumes the UE identity information used before entering the inactive state as the UE identity of the cell;

9) The UE uses the UE identity pre-configured for the UE on the network side as the UE identity of the UE in the cell after entering the connected state.

Example 6: The network side device sends state transition indication information to the UE through RRC, PDCCH or MAC messages to instruct the UE to enter the idle state. The specific steps are shown in Figure 7:

Step S701: The network side sends RRC signaling, MAC CE, or PDCCH message to notify the UE to enter the idle state. The above RRC signaling may be an RRC release message or a newly defined RRC message, or an existing RRC message carries an indication that the UE enters the idle state. ’S identification information;

In step S702, the UE receives the indication information of the network side device, and enters the idle state according to the indication information.

The specific implementation process is as in Example 1-4, and the configuration of the UE to switch to the idle state will not be described in detail.

Example 2

Based on the same inventive concept, the embodiments of the present disclosure also provide a method for instructing a UE in an inactive state to perform a state transition, because this method corresponds to a method corresponding to a network side device that instructs a UE in an inactive state to perform a state transition in the embodiment of the present disclosure. And the principle of this method to solve the problem is similar to that of the network side device, so the implementation of this method can refer to the implementation of the network side device, and the repetition will not be repeated.

As shown in FIG. 8, a flowchart of a method for instructing a UE in an inactive state to perform a state transition according to an embodiment of the present disclosure, which specifically includes the following steps:

Step S801, receiving user plane data transmitted by a UE in an inactive state;

Step S802: When it is determined that the UE is triggered to perform a state transition, the state transition indication information is sent to the UE to instruct the UE to resume SRB or enter a connected state or enter an idle state.

Optionally, sending state transition indication information to the UE to instruct the UE to resume SRB or enter a connected state or enter an idle state, including any one or a combination of the following:

Optionally, sending state transition indication information to the UE includes:

Restore the SRB1 and/or SRB2 interacting with the UE;

Recover the DRB interacting with the UE;

Restore the stored security key and/or security algorithm of the UE.

Based on the same inventive concept, the embodiment of the present disclosure also provides a method for the inactive UE to perform state transition, because this method corresponds to the method corresponding to the UE for the inactive UE to perform state transition in the embodiment of the present disclosure, and the The principle of the method to solve the problem is similar to that of the above-mentioned UE, so the implementation of the method can refer to the implementation of the UE, and the repetition will not be repeated.

As shown in FIG. 9, a method for state transition of a UE in an inactive state provided by an embodiment of the present disclosure specifically includes the following steps:

Step S901, transmitting user plane data to the network side;

Step S902: Receive the state transition instruction information sent when the network side determines to trigger the UE to perform state transition, and restore the SRB or enter the connected state or enter the idle state according to the instruction information.

Optionally, transmitting user plane data to the network side includes:

Transmit data not accompanied by RRC signaling to the network side, and/or

Optionally, when the receiving network side determines to trigger the UE to perform the state transition, the sent state transition indication information includes any one or a combination of the following:

The UE monitors the preset PDCCH scrambled by the preset RNTI.

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

Restore SRB1 and/or SRB2;

Restore DRB;

Recover the stored security keys and/or security algorithms.

Delete the stored UE inactive state context;

Optionally, transmitting user plane data to the network side includes:

Example 3

The foregoing describes a method for instructing an inactive UE to perform a state transition in the present disclosure, and the following describes the network side device that performs the foregoing instructing an inactive UE to perform a state transition.

Referring to FIG. 10, a network-side device for instructing a UE in an inactive state to perform a state transition in an embodiment of the present disclosure includes: at least one processor 1001, at least one memory 1002, and a bus system 1009;

Wherein, a computer program is stored in the memory, and the processor is configured to read the program in the memory and execute:

Receiving user plane data transmitted by the UE in the inactive state;

FIG. 10 is a schematic diagram of a network-side device that instructs a UE in an inactive state to perform a state transition according to an embodiment of the present disclosure. The network-side device 1000 may have relatively large differences due to different configurations or performances, and may include one or more processes Processor (English full name: central processing units, English abbreviation: CPU) 1001 (for example, one or more processors) and memory 1002, one or more storage media 1003 (for example, one or more Mass storage devices). Among them, the memory 1002 and the storage medium 1003 may be short-term storage or permanent storage. The program stored in the storage medium 1003 may include one or more modules (not shown in the figure), and each module may include a series of instruction operations on the information processing device. Furthermore, the processor 1001 may be configured to communicate with the storage medium 1003, and execute a series of instruction operations in the storage medium 1003 on the network side device 1000.

The network side device 1000 may also include one or more wired or wireless network interfaces 1007, one or more input and output interfaces 1008, and/or one or more operating systems 1006, such as Windows Server, Mac OS X, Unix, Linux , FreeBSD, etc.

Optionally, the processor is configured to send state transition indication information to the UE to instruct the UE to resume SRB or enter a connected state or enter an idle state, including any one or a combination of the following:

Optionally, sending state transition indication information to the UE includes:

Restore the SRB1 and/or SRB2 interacting with the UE;

Recover the DRB interacting with the UE;

Restore the stored security key and/or security algorithm of the UE.

Referring to FIG. 11, a UE in an inactive state UE performing state transition in an embodiment of the present disclosure includes: at least one processor 1101, at least one memory 1102, and a bus system 1109;

Transmit user plane data to the network side;

FIG. 11 is a UE in which an inactive UE performs state transition according to an embodiment of the present disclosure. The UE 1100 may have relatively large differences due to different configurations or performance, and may include one or more processors (full English name: central processing). units, English abbreviation: CPU) 1101 (for example, one or more processors) and memory 1102, one or more storage media 1103 for storing application programs 1104 or data 1105 (for example, one or one storage device with a large amount of storage). Among them, the memory 1102 and the storage medium 1103 may be short-term storage or persistent storage. The program stored in the storage medium 1103 may include one or more modules (not shown in the figure), and each module may include a series of instruction operations on the information processing device. Furthermore, the processor 1101 may be configured to communicate with the storage medium 1103, and execute a series of instruction operations in the storage medium 1103 on the UE 1100.

UE1100 may also include one or more wired or wireless network interfaces 1107, one or more input and output interfaces 1008, and/or one or more operating systems 1106, such as Windows Server, Mac OS X, Unix, Linux, FreeBSD, etc. .

Transmit data not accompanied by RRC signaling to the network side, and/or

Optionally, the processor is configured to receive the state transition indication information sent when the network side determines to trigger the UE to perform the state transition, including any one or a combination of the following:

Monitor the preset PDCCH scrambled by the preset RNTI.

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

Restore SRB1 and/or SRB2;

Restore DRB;

Recover the stored security keys and/or security algorithms.

Delete the stored UE inactive state context;

The above describes the network-side device and the UE that perform state transitions of the inactive UE in the embodiment of the present disclosure from the perspective of hardware processing. The following describes the inactive UE in the embodiment of the present disclosure from the perspective of a modular functional entity. The state transition UE and network side equipment are described.

Please refer to FIG. 12, a network-side device for instructing a UE in an inactive state to perform a state transition provided by an embodiment of the present disclosure, and the network-side device includes:

The receiving unit 1201 is configured to receive user plane data transmitted by a UE in an inactive state;

The first conversion unit 1202 is configured to send state transition indication information to the UE when determining to trigger the UE to perform a state transition, so as to instruct the UE to resume SRB or enter a connected state or enter an idle state.

Optionally, the receiving unit is configured to receive user plane data transmitted by a UE in an inactive state, specifically:

Optionally, the first conversion unit is configured to send state transition indication information to the UE to instruct the UE to resume SRB or enter a connected state or enter an idle state, including any one or a combination of the following:

Optionally, the first conversion unit is configured to send state conversion indication information to the UE, and is specifically configured to:

Optionally, the first conversion unit is configured to perform at least one of the following steps before or after the instruction information is sent:

Restore the SRB1 and/or SRB2 interacting with the UE;

Recover the DRB interacting with the UE;

Restore the stored security key and/or security algorithm of the UE.

Please refer to FIG. 13 a UE in which an inactive UE performs a state transition provided by an embodiment of the present disclosure, and the UE includes:

The transmission unit 1301 is used to transmit user plane data to the network side;

The second conversion unit 1302 is configured to receive the state transition instruction information sent when the network side determines that the UE is instructed to perform state transition, and restore the SRB or enter the connected state or enter the idle state according to the instruction information.

Optionally, the transmission unit is used to transmit user plane data to the network side, specifically:

Transmit data not accompanied by RRC signaling to the network side, and/or

Optionally, the second conversion unit is configured to receive the state transition indication information sent when the network side determines to trigger the UE to perform the state transition, including any one or a combination of the following:

Optionally, the second conversion unit is configured to receive the state transition indication information sent when the network side triggers the UE to perform the state transition, and is specifically used for:

Optionally, the second conversion unit is configured to receive the state transition indication information sent when the network side determines to trigger the UE to perform the state transition, and is specifically used for:

Monitor the preset PDCCH scrambled by the preset RNTI.

Optionally, the second conversion unit is configured to receive the state transition instruction information sent when the network side determines to trigger the UE to perform state transition, or after instructing the UE to transition to the connected state according to the instruction information, Include at least one of the following steps:

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

Restore SRB1 and/or SRB2;

Restore DRB;

Recover the stored security keys and/or security algorithms.

Optionally, after the second conversion unit is configured to instruct the UE to switch to the connected state according to the indication information, it further includes performing at least one of the following steps:

Delete the stored UE inactive state context;

Optionally, the transmission unit 1301 is configured to transmit user plane data to the network side, specifically:

The embodiments of the present disclosure also provide a computer-readable storage medium, including instructions, which when run on a computer, cause the computer to execute the method for state transition of the inactive UE provided in the above-mentioned embodiments.

The embodiments of the present disclosure also provide a computer program product, including a computer program, the computer program includes program instructions, when the program instructions are executed by an electronic device, the electronic device executes the inactive UE provided in the above embodiments The method of state transition.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the device and module described above can be referred to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in the present disclosure, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules is only a logical function division, and there may be other divisions in actual implementation, for example, multiple modules or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or modules, and may be in electrical, mechanical or other forms.

The modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, that is, they may be located in one place, or they may be distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional modules in the various embodiments of the present disclosure may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. If the integrated module is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer readable storage medium.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part.

The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present disclosure are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be stored by a computer or a data storage device such as a server or data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

The technical solutions provided by the present disclosure are described in detail above. Specific examples are used in this disclosure to illustrate the principles and implementations of the present disclosure. The descriptions of the above embodiments are only used to help understand the methods and core ideas of the present disclosure. ; At the same time, for those of ordinary skill in the art, based on the ideas of the present disclosure, there will be changes in the specific implementation and scope of application. In summary, the content of this specification should not be construed as limiting the present disclosure.

Claims

A method for instructing a user equipment UE in an inactive state to perform a state transition, characterized in that the method includes:

Receiving user plane data transmitted by the UE in the inactive state;

When it is determined to trigger the UE to perform the state transition, the indication information of the state transition is sent to the UE to instruct the UE to resume the signaling radio bearer SRB or enter the connected state or enter the idle state.
The method according to claim 1, wherein receiving user plane data transmitted by a UE in an inactive state comprises:

Receiving the data transmitted by the UE in the inactive state that is not accompanied by radio resource control RRC signaling; and/or

Receiving the user plane data transmitted by the UE in the inactive state, and the RRC signaling transmitted by the UE has not been received before receiving the user plane data.
The method according to claim 1, wherein sending state transition indication information to the UE to instruct the UE to resume SRB or enter a connected state or enter an idle state, including one or a combination of the following:

Sending, to the UE through RRC signaling, the indication information of the state transition carrying the identity of the cell where the UE is camping on, so as to instruct the UE to enter the connected state; or

Sending, to the UE via the physical downlink control channel PDCCH, the indication information carrying the status transition of the cell identity where the UE is camping on, so as to instruct the UE to enter the connected state; or

Sending, to the UE through a media access control MAC message, the indication information carrying the status transition of the cell identity where the UE is camping on, so as to instruct the UE to enter the connected state; or

Sending state transition indication information to the UE through RRC signaling to instruct the UE to enter the connected state or the idle state; or

Sending state transition indication information to the UE through the PDCCH to instruct the UE to resume SRB or enter the connected state or enter the idle state; or

The indication information of state transition is sent to the UE through the MAC message to instruct the UE to resume SRB or enter the connected state or enter the idle state.
The method according to any one of claims 1 to 3, characterized in that sending the indication information of state transition to the UE comprises:

The message B MSGB or the message 4 MSG4 in the random access process carries the indication information indicating the state transition of the UE.
The method according to any one of claims 1 to 3, wherein sending the indication information of state transition to the UE comprises:

The indication information is sent through the preset PDCCH scrambled by the preset radio network temporary identifier RNTI, or the scheduling information of the indication information is sent.
The method according to claim 1, characterized in that, before sending the instruction information or after sending the instruction information, it further comprises performing at least one of the following steps:

Reestablishing the PDCP entity of the packet data convergence protocol of the first signaling radio bearer SRB1 and/or the PDCP entity of the second signaling radio bearer SRB2 that interacts with the UE;

Restore the SRB1 and/or SRB2 interacting with the UE;

Recovering the data radio bearer DRB that interacts with the UE;

Restore the stored security key and/or security algorithm of the UE.
A method for a UE in an inactive state to perform state transition, characterized in that the method includes:

Transmit user plane data to the network side;

When the receiving network side determines to trigger the state transition indication information sent by the UE to instruct the state transition, the SRB is restored or enters the connected state or enters the idle state according to the instruction information.
The method according to claim 7, wherein the transmitting user plane data to the network side comprises:

Transmit data not accompanied by RRC signaling to the network side, and/or

The user plane data is transmitted to the network side, and the RRC signaling is not transmitted to the network side before the user plane data is transmitted.
The method according to claim 7, wherein when the receiving network side determines to trigger the UE to perform the state transition, the state transition indication information sent includes one or a combination of the following:

When the receiving network side determines to trigger and instruct the UE to perform state transition, the indication information that carries the identity of the cell where the UE is camped on is sent through RRC signaling and enters the connected state; or

When the receiving network side determines to trigger and instruct the UE to perform a state transition, the indication information that carries the identity of the cell where the UE is camped on is sent through the PDCCH and enters the connected state, or resumes the SRB to enter the connected state; or

When the receiving network side determines to trigger and instruct the UE to perform state transition, the indication information that carries the identity of the cell where the UE is camped on is sent through the MAC message and enters the connected state, or resumes the SRB and enters the connected state; or

When the receiving network side determines to trigger the state transition indication information sent by the RRC signaling to instruct the UE to perform the state transition, and enters the connected state or the idle state; or

When the receiving network side determines to trigger the state transition indication information sent by the PDCCH to instruct the UE to perform state transition, and restore the SRB to enter the connected state or enter the connected state or enter the idle state; or

When the receiving network side determines to trigger the state transition indication information sent by the MAC message when the UE is instructed to perform the state transition, and restore the SRB to enter the connected state or enter the connected state or enter the idle state.
The method according to any one of claims 7-9, wherein the state transition indication information sent when the receiving network triggers the UE to perform the state transition includes:

The receiving network side carries the indication information indicating the state transition through the MSGB or MSG4 in the random access process.
The method according to any one of claims 7-9, wherein the state transition indication information sent when the receiving network side determines to trigger the UE to perform the state transition includes:

The UE monitors the preset PDCCH scrambled by the preset RNTI.
The method according to any one of claims 7-9, wherein when the receiving network side determines to trigger the UE to perform the state transition, it is sent before the state transition instruction information, or instructs the UE to transition to the state transition based on the instruction information. After the connection state, it also includes performing at least one of the following steps:

Apply the default configuration of SRB1 and/or the default configuration of SRB2 specified in the protocol;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

Restore SRB1 and/or SRB2;

Restore DRB;

Recover the stored security keys and/or security algorithms.
The method according to claim 7, wherein after instructing the UE to switch to the connected state according to the indication information, the method further comprises performing at least one of the following steps:

Delete the stored UE inactive state context;

Use the preset RNTI as the UE identifier to interact with the network side, where the preset RNTI is the RNTI used when listening to the preset PDCCH when receiving the indication information;

Use the UE identity used before entering the inactive state as the UE identity of the UE in the cell;

The UE identity pre-configured on the network side is used as the UE identity of the UE in the cell after entering the connected state.
The method according to claim 7, wherein the transmitting user plane data to the network side comprises:

Transmit user plane data to the network side through the pre-configured uplink resources of the camping cell; or

The user plane data is transmitted to the network side through the non-competitive random access resources allocated by the camping cell.
A network-side device for instructing a UE in an inactive state to perform state transition, which is characterized by comprising: a memory and a processor, and a computer program is stored in the memory;

The processor is used to read the program in the memory and execute:

Receiving user plane data transmitted by the UE in the inactive state;

When it is determined that the UE is triggered to perform the state transition, the indication information of the state transition is sent to the UE to instruct the UE to resume SRB or enter the connected state or enter the idle state.
The network side device according to claim 15, wherein the processor is configured to receive user plane data transmitted by a UE in an inactive state, and is specifically configured to:

Receiving the data transmitted by the UE in the inactive state that is not accompanied by RRC signaling; and/or

Receiving the user plane data transmitted by the UE in the inactive state, and the RRC signaling transmitted by the UE has not been received before receiving the user plane data.
The network-side device according to claim 15, wherein the processor is configured to send state transition indication information to the UE to instruct the UE to resume SRB or enter a connected state or enter an idle state, including one of the following One or combination:

Sending, to the UE through RRC signaling, the indication information of the state transition carrying the identity of the cell where the UE is camping on, so as to instruct the UE to enter the connected state; or

Sending, to the UE through the PDCCH, indication information carrying the status transition of the cell identity where the UE is camping on, so as to instruct the UE to enter the connected state; or

Sending the indication information of the state transition of the cell identity where the UE is camping on to the UE through a MAC message, so as to instruct the UE to enter the connected state; or

Sending state transition indication information to the UE through RRC signaling to instruct the UE to enter the connected state or the idle state; or

Sending state transition indication information to the UE through the PDCCH to instruct the UE to resume SRB or enter the connected state or enter the idle state; or

The indication information of state transition is sent to the UE through the MAC message to instruct the UE to resume SRB or enter the connected state or enter the idle state.
The network-side device according to any one of claims 15 to 17, wherein the sending of state transition indication information to the UE comprises:

The MSGB or MSG4 in the random access process carries the indication information indicating the state transition of the UE.
The network-side device according to any one of claims 15 to 17, wherein the processor is configured to send state transition indication information to the UE, and is specifically configured to:

The indication information is sent through the preset PDCCH scrambled by the preset RNTI, or the scheduling information of the indication information is sent.
The network side device according to claim 15, wherein the processor is configured to perform at least one of the following steps before or after sending the instruction information:

Reestablishing the PDCP entity of SRB1 and/or reestablishing the PDCP entity of SRB2 that interacts with the UE;

Restore the SRB1 and/or SRB2 interacting with the UE;

Recover the DRB interacting with the UE;

Restore the stored security key and/or security algorithm of the UE.
A user equipment UE, characterized by comprising: a memory and a processor, and a computer program is stored in the memory;

The processor is used to read the program in the memory and execute:

Transmit user plane data to the network side;

When the receiving network side determines to trigger the state transition indication information sent by the UE to instruct the state transition, the SRB is restored or enters the connected state or enters the idle state according to the instruction information.
The UE according to claim 21, wherein the processor is configured to transmit user plane data to the network side, and is specifically configured to:

Transmit data not accompanied by RRC signaling to the network side, and/or,

The user plane data is transmitted to the network side, and the RRC signaling is not transmitted to the network side before the user plane data is transmitted.
The UE according to claim 21, wherein the processor is configured to receive the state transition indication information sent when the network side determines to trigger the UE to perform the state transition, and includes one or a combination of the following:

When the receiving network side determines to trigger and instruct the UE to perform state transition, the indication information that carries the identity of the cell where the UE is camped on is sent through RRC signaling and enters the connected state; or

When the receiving network side determines to trigger and instruct the UE to perform a state transition, the indication information that carries the identity of the cell where the UE is camped on is sent through the PDCCH and enters the connected state, or resumes the SRB to enter the connected state; or

When the receiving network side determines to trigger and instruct the UE to perform state transition, the indication information that carries the identity of the cell where the UE is camped on is sent through the MAC message and enters the connected state, or resumes the SRB and enters the connected state; or

When the receiving network side determines to trigger the state transition indication information sent by the RRC signaling to instruct the UE to perform the state transition, and enters the connected state or the idle state; or

When the receiving network side determines to trigger the state transition indication information sent by the PDCCH to instruct the UE to perform state transition, and restore the SRB to enter the connected state or enter the connected state or enter the idle state; or

When the receiving network side determines to trigger the state transition indication information sent by the MAC message when the UE is instructed to perform the state transition, and restore the SRB to enter the connected state or enter the connected state or enter the idle state.
The UE according to any one of claims 21 to 23, wherein the processor is configured to receive the state transition indication information sent when the network side triggers the UE to perform the state transition, and is specifically used for:

The receiving network side carries the indication information indicating the state transition through the MSGB or MSG4 in the random access process.
The UE according to any one of claims 21 to 23, wherein the processor is configured to receive the state transition indication information sent when the network side determines to trigger the UE to perform the state transition, and is specifically used for:

Monitor the preset PDCCH scrambled by the preset RNTI.
The UE according to any one of claims 21 to 23, wherein the processor is configured to receive the state transition indication information sent before or according to the indication information when the network side determines to trigger the UE to perform the state transition. After the UE switches to the connected state, it further includes performing at least one of the following steps:

Apply the default configuration of SRB1 and/or the default configuration of SRB2 specified in the protocol;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

Restore SRB1 and/or SRB2;

Restore DRB;

Recover the stored security keys and/or security algorithms.
The UE according to claim 21, wherein after the processor is configured to instruct the UE to switch to the connected state according to the indication information, the processor further comprises performing at least one of the following steps:

Delete the stored UE inactive state context;

Use the preset RNTI as the UE identifier to interact with the network side, where the preset RNTI is the RNTI used when listening to the preset PDCCH when receiving the indication information;

Use the UE identity used before entering the inactive state as the UE identity of the UE in the cell;

The UE identity pre-configured on the network side is used as the UE identity of the UE in the cell after entering the connected state.
The UE according to claim 21, wherein the processor is configured to transmit user plane data to the network side, and is specifically configured to:

Transmit user plane data to the network side through the pre-configured uplink resources of the camping cell; or

The user plane data is transmitted to the network side through the non-competitive random access resources allocated by the camping cell.
A network-side device for instructing a UE in an inactive state to perform a state transition, characterized in that the network-side device includes:

The receiving unit is used to receive user plane data transmitted by the UE in the inactive state;

The first conversion unit is configured to send state transition indication information to the UE when determining that the UE is triggered to perform state transition, so as to instruct the UE to resume SRB or enter a connected state or enter an idle state.
The network side device according to claim 29, wherein the receiving unit is configured to receive user plane data transmitted by the UE in an inactive state, and is specifically configured to:

Receiving the data transmitted by the UE in the inactive state that is not accompanied by RRC signaling; and/or

Receiving the user plane data transmitted by the UE in the inactive state, and the RRC signaling transmitted by the UE has not been received before receiving the user plane data.
The network side device according to claim 29, wherein the first conversion unit is configured to send state transition indication information to the UE to instruct the UE to resume SRB or enter a connected state or enter an idle state, Including any one or combination of the following:

Sending, to the UE through RRC signaling, the indication information of the state transition carrying the identity of the cell where the UE is camping on, so as to instruct the UE to enter the connected state; or

Sending, to the UE through the PDCCH, indication information carrying the status transition of the cell identity where the UE is camping on, so as to instruct the UE to enter the connected state; or

Sending the indication information of the state transition of the cell identity where the UE is camping on to the UE through a MAC message, so as to instruct the UE to enter the connected state; or

Sending state transition indication information to the UE through RRC signaling to instruct the UE to enter the connected state or the idle state; or

Sending state transition indication information to the UE through the PDCCH to instruct the UE to resume SRB or enter the connected state or enter the idle state; or

The indication information of state transition is sent to the UE through the MAC message to instruct the UE to resume SRB or enter the connected state or enter the idle state.
The network side device according to any one of claims 29 to 31, wherein the first conversion unit is configured to send state conversion indication information to the UE, and is specifically configured to:

The MSGB or MSG4 in the random access process carries the indication information indicating the state transition of the UE.
The network side device according to any one of claims 29 to 31, wherein the first conversion unit is configured to send state conversion indication information to the UE, and is specifically configured to:

The indication information is sent through the preset PDCCH scrambled by the preset RNTI, or the scheduling information of the indication information is sent.
The network side device according to claim 29, wherein the first conversion unit is configured to perform at least one of the following steps before or after the instruction information is sent:

Reestablishing the PDCP entity of SRB1 and/or reestablishing the PDCP entity of SRB2 that interacts with the UE;

Restore the SRB1 and/or SRB2 interacting with the UE;

Recover the DRB interacting with the UE;

Restore the stored security key and/or security algorithm of the UE.
A user equipment UE, characterized in that the UE includes:

The transmission unit is used to transmit user plane data to the network side;

The second conversion unit is configured to receive the state transition instruction information sent when the network side determines to trigger the UE to perform state transition, and restore the SRB or enter the connected state or enter the idle state according to the instruction information.
The UE according to claim 35, wherein the transmission unit is configured to transmit user plane data to the network side, and is specifically configured to:

Transmit data not accompanied by RRC signaling to the network side, and/or

The user plane data is transmitted to the network side, and the RRC signaling is not transmitted to the network side before the user plane data is transmitted.
The UE according to claim 35, wherein the second conversion unit is configured to receive the state transition indication information sent when the network side determines to trigger the UE to perform the state transition, and includes any one or a combination of the following:

When the receiving network side determines to trigger and instruct the UE to perform state transition, the indication information that carries the identity of the cell where the UE is camped on is sent through RRC signaling and enters the connected state; or

When the receiving network side determines to trigger and instruct the UE to perform a state transition, the indication information that carries the identity of the cell where the UE is camped on is sent through the PDCCH and enters the connected state, or resumes the SRB to enter the connected state; or

When the receiving network side determines to trigger and instruct the UE to perform state transition, the indication information that carries the identity of the cell where the UE is camped on is sent through the MAC message and enters the connected state, or resumes the SRB and enters the connected state; or

When the receiving network side determines to trigger the state transition indication information sent by the RRC signaling to instruct the UE to perform the state transition, and enters the connected state or the idle state; or

When the receiving network side determines to trigger the state transition indication information sent by the PDCCH to instruct the UE to perform state transition, and restore the SRB to enter the connected state or enter the connected state or enter the idle state; or

When the receiving network side determines to trigger the state transition indication information sent by the MAC message when the UE is instructed to perform the state transition, and restore the SRB to enter the connected state or enter the connected state or enter the idle state.
The UE according to any one of claims 35 to 37, wherein the second conversion unit is configured to receive the state transition indication information sent when the network side triggers the UE to perform the state transition, and is specifically used for:

The receiving network side carries the indication information indicating the state transition through the MSGB or MSG4 in the random access process.
The UE according to any one of claims 35 to 37, wherein the second conversion unit is configured to receive the state transition indication information sent when the network side determines to trigger the UE to perform the state transition, and is specifically used for:

Monitor the preset PDCCH scrambled by the preset RNTI.
The UE according to any one of claims 35 to 37, wherein the second conversion unit is configured to receive the state transition indication information sent by the network side when the network side determines to trigger the UE to perform the state transition, or according to the state transition instruction information. After the indication information indicates that the UE switches to the connected state, it further includes performing at least one of the following steps:

Apply the default configuration of SRB1 and/or the default configuration of SRB2 specified in the protocol;

Rebuild the PDCP entity of SRB1 and/or rebuild the PDCP entity of SRB2;

Restore SRB1 and/or SRB2;

Restore DRB;

Recover the stored security keys and/or security algorithms.
The UE according to claim 35, wherein the second conversion unit is configured to instruct the UE to switch to the connected state according to the indication information, further comprising performing at least one of the following steps:

Delete the stored UE inactive state context;

Use the preset RNTI as the UE identifier to interact with the network side, where the preset RNTI is the RNTI used when listening to the preset PDCCH when receiving the indication information;

Use the UE identity used before entering the inactive state as the UE identity of the UE in the cell;

The UE identity pre-configured on the network side is used as the UE identity of the UE in the cell after entering the connected state.
The UE according to claim 35, wherein the transmission unit is configured to transmit user plane data to the network side, and is specifically configured to:

Transmit user plane data to the network side through the pre-configured uplink resources of the camping cell; or

The user plane data is transmitted to the network side through the non-competitive random access resources allocated by the camping cell.
A computer-readable storage medium, characterized by comprising computer program instructions, which when run on a computer, cause the computer to execute the method according to any one of claims 1 to 6, or execute the method according to claim 7 to 14. The method of any one of 14.