CN111436049A

CN111436049A - Method, device and equipment for initial access

Info

Publication number: CN111436049A
Application number: CN201910239776.1A
Authority: CN
Inventors: 汪巍崴; 王弘; 许丽香
Original assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Current assignee: Beijing Samsung Telecom R&D Center; Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Priority date: 2019-01-15
Filing date: 2019-03-27
Publication date: 2020-07-21

Abstract

The embodiment of the application provides a method, a device and equipment for initial access, wherein the method for initial access comprises the following steps: receiving a first configuration message; and establishing connection with the anchor node according to the first configuration message. The method provided by the application realizes the connection establishment of the centralized units of the relay nodes and the anchor nodes through the information interaction between the base stations and the relay nodes.

Description

Method, device and equipment for initial access

Technical Field

The present application relates to the field of wireless communication technologies, and in particular, to a method, an apparatus, and a device for initial access.

Background

In the 5G network, the study of the Access backhaul integrated iab (integrated Access and backhaul) topic aims to construct a multi-hop relay network architecture, as shown in fig. 1, which can effectively extend the coverage of the network, as an example, the network architecture in fig. 1 includes an anchor node and two relay nodes, the user communicates with the anchor node directly via a wireless link (e.g., user 1), or connects with the relay node via a wireless link, and finally communicates with the anchor node via a wireless link between the relay nodes (e.g., user 2 communicates with the anchor node via relay node 1, user 3 communicates with the anchor node via relay node 2 and relay node 1), and in the architecture, the anchor node is a base station composed of a central unit CU (central unit) and a distribution unit DU (distributed unit), the central unit and the distribution unit are base stations communicating via an F1 interface, the central unit and the distribution unit are provided with at least a radio resource control unit (RRC) and a packet Data Protocol (PDCP) layer, the central unit and the distribution unit include a Mobile Protocol transport Protocol terminal part (MAC-IP) for providing a transport Protocol for the Access control over an IP transport Protocol, and a transport Protocol over an IP transport Protocol over an IP transport plane (MAC-IP transport Protocol transport network interface, such as an IP-IP transport Protocol transport network interface (IP-network interface, and a network interface including an IP-IP transport network interface (IP-network interface including a transport Protocol transport network interface (IP-network interface including an IP-network interface (IP-network interface).

In the method, the relay node and the anchor node are connected in a manner that the relay node 2 needs to be connected to the anchor node through a relay node 1, as shown in fig. 2, the two connection manners are illustrated, in an actual network, the relay node 2 is allowed to be directly connected to the anchor node, or connected to the anchor node through one or more other relay nodes, fig. 2(a) illustrates an independent networking manner, that is, the relay node 2 accesses the anchor node through the relay node 1, fig. 2(b) illustrates one of the multiple connection networking manners, as illustrated, if the relay node establishes Dual-Connectivity with the anchor node by establishing Dual-Connectivity with one L TE base station and one anchor node, there is an X2 interface between L TE base station and the anchor node, in this manner, the relay node first establishes a connection with a L0 TE base station, then establishes a communication between the relay node 2 and the anchor node through the anchor node b, and the relay node b 2 with the anchor node b through a Master node b, or a Master node b — nb 2-b — a relay node b 5-b — a relay node b — a primary node b 5-b (b) and an anchor node b — a Master node b — a primary node b — a relay node b — a primary node b — an anchor node b 5-node b — an anchor node b 5-base station (a node b — an anchor node b — a node b — an anchor node.

Each relay node is accessed to the anchor node, and the method can be roughly divided into two steps:

step 1: the mobile terminal part of the relay node accesses the anchor node, i.e. establishes a connection with the anchor node (or a centralized unit of anchor nodes), and can communicate with the anchor node directly or through one or more other relay nodes.

Step 2: the distribution unit portion of the relay node establishes a connection with the centralized unit of anchor nodes that may be used to support data communications over the F1 interface (e.g., F1-C, F1-U).

After the two steps are completed, the relay node can provide service for the user.

The design of the prior art does not consider whether a network accessed by a relay node has the capability of supporting the relay node, and how to enable the relay node to communicate with a centralized unit of an anchor node after the relay node is accessed into the network.

Disclosure of Invention

The application provides a method, a device and equipment for initial access in a multi-hop relay network aiming at the defects of the existing mode, and is used for solving the problem of how to enable a relay node to communicate with a centralized unit of an anchor node.

In a first aspect, a method for initial access is provided, which is applied to a relay node, and includes:

receiving a first configuration message;

and establishing connection with the anchor node according to the first configuration message.

In a second aspect, a method for initial access is provided, which is applied to a first node, and includes:

receiving a first indication message, wherein the first indication message comprises indication information indicating that a node to which the first indication message is directed is a relay node;

according to the indication information, sending a first configuration message to the relay node for the relay node to access the anchor node;

the first configuration message includes at least one of: the first information of the cell supporting the access of the relay node or the distribution unit of the relay node, the second information of the cell allowing the access of the relay node or the distribution unit of the relay node, the address information of the anchor node side and the address information of the relay node side.

In a third aspect, a method for initial access is provided, which is applied to a first base station, and includes:

sending a first request message to the second base station, wherein the first request message comprises configuration information for accessing the relay node to the second base station;

and receiving a first response message sent by a second base station for establishing connection between the relay node and the second base station.

In a fourth aspect, a method for initial access is provided, which is applied to a first base station, and includes:

sending a third request message to the second base station for indicating whether the first base station has the capability of allowing the relay node or the distribution unit of the relay node to access the network;

and receiving a third response message sent by the second base station for indicating whether the second base station has the capability of allowing the relay node or the distribution unit of the relay node to access the network.

In a fifth aspect, an apparatus for initial access is provided, and is applied to a relay node, and includes:

a first receiving module, configured to receive a first configuration message;

and the establishing module is used for establishing connection with the anchor node according to the first configuration message.

In a sixth aspect, an apparatus for initial access is provided, which is applied to a first node, and includes:

a second receiving module, configured to receive a first indication message, where the first indication message includes indication information indicating that a node to which the first indication message is directed is a relay node;

the first sending module is used for sending a first configuration message to the relay node according to the indication information so that the relay node can be accessed to the anchor node;

In a seventh aspect, an apparatus for initial access is provided, and is applied to a first base station, and includes:

a second sending module, configured to send a first request message to the second base station, where the first request message includes configuration information for accessing the relay node to the second base station;

and the third receiving module is used for receiving the first response message sent by the second base station so as to establish connection between the relay node and the second base station.

In an eighth aspect, an apparatus for initial access is provided, which is applied to a first base station, and includes:

a third request message module, configured to send a third request message to the second base station, so as to indicate whether the first base station has a capability of allowing the relay node or the distribution unit of the relay node to access the network;

and a third response message module, configured to receive a third response message sent by the second base station, so as to indicate whether the second base station has a capability of allowing the relay node or the distribution unit of the relay node to access the network.

In a ninth aspect, there is provided a relay apparatus comprising: a processor; and

a memory configured to store machine readable instructions which, when executed by the processor, cause the processor to perform the method of initial access in the first aspect.

In a tenth aspect, there is provided a first node apparatus comprising: a processor; and

a memory configured to store machine readable instructions which, when executed by the processor, cause the processor to perform the method of initial access of the second aspect.

In an eleventh aspect, there is provided a base station apparatus comprising: a processor; and

a memory configured to store machine readable instructions which, when executed by the processor, cause the processor to perform the method of initial access in the third aspect.

In a twelfth aspect, there is provided a base station apparatus, including: a processor; and

a memory configured to store machine readable instructions that, when executed by the processor, cause the processor to perform the method of initial access in the fourth aspect.

The technical scheme provided by the embodiment of the application at least has the following beneficial effects:

1) enabling the relay node to access a network supporting access by the relay node.

2) Enabling the relay node to connect to an anchor node supporting access by the relay node.

3) Enabling the distribution unit of the relay node to establish a connection with the concentration unit of the anchor node.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments of the present application will be briefly described below.

Fig. 1 is a schematic diagram of a conventional multi-hop relay network architecture;

fig. 2 is a schematic diagram of a conventional relay node connected to an anchor node;

fig. 3 is a flowchart illustrating an initial access method according to an embodiment of the present application;

fig. 4 is a flowchart illustrating another method for initial access according to an embodiment of the present application;

fig. 5 is a flowchart illustrating another method for initial access according to an embodiment of the present application;

fig. 5a is a schematic flowchart of another method for initial access according to an embodiment of the present application;

fig. 6 is a schematic flowchart of a process of configuring, by a first node, information related to a relay node accessing an anchor node according to an embodiment of the present application;

fig. 7 is a schematic flowchart of a process of configuring a relay node to establish a connection with an anchor node according to the first aspect of the embodiment of the present application;

fig. 8 is another schematic flow chart illustrating a configuration of a relay node and an anchor node in the first aspect of the embodiment of the present application;

fig. 9 is a schematic flowchart of a process of configuring a relay node to establish a connection with an anchor node according to the first aspect of the embodiment of the present application;

fig. 10 is a schematic flow chart illustrating a procedure of configuring a relay node to establish a connection with an anchor node according to the first aspect of the embodiment of the present application;

fig. 11 is a schematic flowchart of configuring a relay node between base stations according to an embodiment of the present application;

fig. 12 is a schematic flowchart of interaction information between base stations according to an embodiment of the present application;

fig. 13 is a schematic flowchart illustrating information interaction between a distribution unit of a base station and a central unit of the base station according to an embodiment of the present application;

fig. 14 is a schematic flowchart of a relay node providing auxiliary information to a base station according to an embodiment of the present application;

fig. 14a is a schematic flow chart of a base station distribution unit accessed by a relay node or other relay nodes providing auxiliary information to a base station or a central unit of the base station;

fig. 15 is a schematic flowchart of a second aspect of the present application, illustrating a process of configuring a relay node to establish a connection with an anchor node;

fig. 16 is another schematic flow chart illustrating a configuration of a relay node establishing a connection with an anchor node according to the second aspect of the embodiment of the present application;

fig. 17 is a schematic structural diagram of an initial access apparatus according to an embodiment of the present application;

fig. 18 is a schematic structural diagram of another initial access apparatus provided in an embodiment of the present application;

fig. 19 is a schematic structural diagram of another apparatus for initial access according to an embodiment of the present application;

fig. 20 is a schematic structural diagram of another initial access apparatus according to an embodiment of the present application.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Example one

An embodiment of the present application provides an initial access method, which is applied to a relay node, and a flowchart of the method is shown in fig. 3, where the method includes:

step S101, a first configuration message is received.

Step S102, according to the first configuration message, establishing connection with the anchor node.

In the embodiment of the application, a relay node receives a first configuration message; and the relay node establishes connection with the anchor node according to the first configuration message. In this way, the distribution unit of the relay node can be enabled to establish a connection with the concentration unit of the anchor node.

Specifically, the first configuration message includes at least one of:

the first information of the cell supporting the access of the relay node or the distribution unit of the relay node, the second information of the cell allowing the access of the relay node or the distribution unit of the relay node, the address information of the anchor node side and the address information of the relay node side.

Specifically, the anchor node is of any one of the following types:

base station, base station comprising a concentration unit and a distribution unit, concentration unit of base station.

Optionally, the connection with the anchor node is established by at least one of the following processes:

selecting a cell supporting the relay node access according to at least one of first information indicating a cell supporting the relay node or the relay node distribution unit access and second information indicating a cell allowing the relay node or the relay node distribution unit access, and establishing a connection with an anchor node of a serving cell;

and establishing connection with the anchor node according to at least one address information of the anchor node side and the address information of the relay node side.

Further, the former is used to establish the connection (e.g. RRC connection) between the mobile terminal of the relay node and the anchor node, and the latter is used to establish the connection (e.g. F1 interface) between the distribution unit of the relay node and the anchor node (or the centralized unit of the anchor node).

Specifically, the address information of the anchor node side includes at least one of:

identification information of the anchor node, identification information of a cell served by the anchor node side, an IP address of the anchor node side, an MAC address of the anchor node side, and SCTP flow identification information.

Specifically, the address information of the relay node side includes at least one of the following:

the identification information of the accessed anchor node, the identification information of the cell served by the accessed anchor node, the IP address of the relay node side, the MAC address of the relay node side and the SCTP flow identification information.

Example two

Another method for initial access is provided in this embodiment of the present application, and is applied to a first node, a flowchart of the method is shown in fig. 4, and the method includes:

step S201, receiving a first indication message, where the first indication message includes indication information indicating that a node to which the first indication message is directed is a relay node.

Step S202, according to the indication information, a first configuration message is sent to the relay node, so that the relay node can be accessed to the anchor node.

Specifically, the first node is of any one of the following types:

an operation, maintenance and management system (OAM), a base station, a centralized unit of the base station, an anchor node, and a centralized unit of the anchor node.

Specifically, the indication information indicating that the node to which the first indication message is directed is a relay node includes at least one of:

indication information indicating that a node to which the first indication message is directed is a node supporting a relay function, indication information indicating that a node to which the first indication message is directed is an IAB node.

In the embodiment of the application, a first node receives a first indication message, wherein the first indication message comprises indication information indicating that a node to which the first indication message is directed is a relay node; and the first node sends a first configuration message to the relay node according to the indication information so that the relay node can be accessed to the anchor node. As such, the relay node is a node supporting the relay function, or the relay node is an IAB node, thereby enabling the relay node to establish a connection with the centralized unit of the anchor node.

EXAMPLE III

In the embodiment of the present application, there is provided another method for initial access in a multihop relay network, which is applied to a first base station, and a flowchart of the method is shown in fig. 5, where the method includes:

step S301, sending a first request message to the second base station, wherein the first request message comprises configuration information for accessing the relay node to the second base station;

step S302, receiving a first response message sent by the second base station, so as to establish a connection between the relay node and the second base station.

Specifically, the information carried by the configuration information includes at least one of the following:

identification information of the relay node, identification information indicating the relay node (identification information indicating that the node to which the message is directed is the relay node), identification information of a cell that supports access of the relay node or the distribution unit of the relay node, identification information of a cell that allows access of the relay node or the distribution unit of the relay node, a request message (e.g., F1 SetupRequest) generated by the relay node (or the distribution unit of the relay node) to establish connection with the anchor node (or the concentration unit of the anchor node), address information of the anchor node side, address information of the relay node side, address information of the anchor node side to which the relay node establishes connection with the anchor node, and/or address information of the relay node side, the anchor node being the second base station.

Specifically, the information carried by the first response message includes at least one of the following:

identification information of the relay node, a Response message (such as F1Setup Response/Failure) generated by the anchor node and used for establishing connection between the anchor node and the relay node (or a distribution unit of the anchor node), address information of the anchor node side, address information of the relay node side, address information of the anchor node side and/or address information of the relay node side and reason information used for establishing connection between the relay node and the anchor node.

Optionally, before sending the first request message to the second base station, the method further includes:

and receiving a second request message sent by the relay node.

Specifically, the second request message includes at least one of:

indication information indicating the relay node (indication information indicating that the node to which the message is directed is the relay node), identification information of a cell supporting access of the relay node or the distribution unit of the relay node, identification information of a cell allowing access of the relay node or the distribution unit of the relay node, a Request message (such as F1Setup Request) generated by the relay node to establish connection with the anchor node (or the concentration unit of the anchor node), address information of the anchor node side, address information of the relay node side, address information of the anchor node side to which the relay node establishes connection with the anchor node, and/or address information of the relay node side.

Optionally, after receiving the first response message sent by the second base station, the method further includes:

and sending a second configuration message to the relay node for the relay node to establish the transport network layer association with the second base station.

Specifically, the second configuration message includes at least one of:

a Response message (e.g., F1Setup Response/Failure) generated by the anchor node (or the anchor node's centralized unit) to establish a connection with the relay node (relay node's distributed unit), address information of the anchor node side, address information of the relay node side, address information of the anchor node side used for establishing a connection between the relay node and the anchor node, and/or address information of the relay node side.

Optionally, before the receiving the second request message sent by the relay node, the method further includes:

and receiving the auxiliary information sent by the relay node for the first base station to select a base station (or anchor node) for establishing connection with the relay node.

Specifically, the auxiliary information includes at least one of:

indication information indicating a relay node (indication information indicating that a node to which the message is directed is a relay node), third information indicating a cell supporting access of the relay node or a distribution unit of the relay node, fourth information indicating a cell allowing access of the relay node or the distribution unit of the relay node, address information of an anchor node side, and address information of the relay node side.

In the embodiment of the present application, another method for initial access is provided, and is applied to a first base station, a flowchart of the method is shown in fig. 5a, and the method includes:

step S401, sending a third request message to the second base station, so as to indicate whether the first base station has a capability of allowing the relay node or the distribution unit of the relay node to access the network.

Step S402, receiving a third response message sent by the second base station, so as to indicate whether the second base station has a capability of allowing the relay node or the distribution unit of the relay node to access the network.

It should be noted that, in an embodiment, steps S401 and S402 may be performed before receiving a request message sent by the relay node to establish a connection with the anchor node.

Specifically, the third request message includes at least one of:

the relay node access control method comprises indicating whether a first base station supports the access of the relay node or a distribution unit of the relay node, address information used by the relay node to the first base station when the relay node establishes connection with the first base station, address information used by the relay node when the relay node establishes connection with the first base station, indicating information whether a service cell of the first base station supports the access of the relay node or the distribution unit of the relay node, and indicating information whether a neighbor service cell of the first base station supports the access of the relay node or the distribution unit of the relay node.

Specifically, the third response message includes at least one of:

the relay node access control method comprises indicating information whether a second base station supports access of a relay node or a distribution unit of the relay node, address information used by the relay node to the second base station when the relay node establishes connection with the second base station, address information used by the relay node when the relay node establishes connection with the second base station, indicating information whether a serving cell of the second base station supports access of the relay node or the distribution unit of the relay node, and indicating information whether a neighbor serving cell of the second base station supports access of the relay node or the distribution unit of the relay node.

Example four

The method for initial access in the above embodiments one, two and three of the present application is described in detail in the following embodiments:

in this application, the anchor node means a 5G base station, or a 5G base station including a concentration unit and a distribution unit, or a concentration unit of a 5G base station.

The method aims to realize the connection establishment between the relay node and the anchor node, and mainly aims to establish the connection (such as an F1 interface) between the distribution unit part of the relay node and the centralized unit in the anchor node.

In this application, a message sent between two nodes, or a process performed between two nodes, may be performed through a link directly connected between the two nodes, or may be performed through one or more other nodes between the two nodes.

The message names in this application are examples only, and other names may be applicable.

The following two address information will be used in this application:

■ address information of anchor node side, the address information is the address information of anchor node side (or the centralized unit side of anchor node) used by the relay node accessing the anchor node (or the centralized unit of anchor node). The address information can be the address information representing one address, or the address information list representing a plurality of addresses.A, in one embodiment, the address information of one address is the information of anchor node side (or the centralized unit of anchor node) used for establishing the Transport network layer association (TN L A: Transport network layer association). The address information at least includes the following information:

■ identification information of anchor node, such as base station ID, base station concentration unit ID, anchor node concentration unit ID, etc.;

■ cell identification information, relay node accessing the cell can establish connection with the anchor node;

■ IP address of the anchor node (or the anchor node's central unit) side;

■ SCTP stream identification information (SCTP stream identifier);

■ MAC address on the anchor node (or concentration unit of anchor nodes) side.

■ address information on a relay node side, the address information being address information on the relay node side used by the relay node to access the anchor node (or a centralized unit of the anchor node). the address information may be address information used by the relay node, or address information used by a mobile terminal part of the relay node, or address information used by a distributed unit part of the relay node.

■ IP address of relay node side;

■ SCTP stream identification information (SCTP stream identifier);

■ MAC address of relay node side;

■, identification information of the anchor node accessed, such as base station ID, base station concentration unit ID, anchor node concentration unit ID, etc.;

■ cell identification information, a relay node accessing the cell can establish a connection with the anchor node.

In the following description, the above two address information will be represented by "address information on the anchor node side" and "address information on the relay node side", respectively.

In a first aspect of the present application: and the first node configures the relevant information of the relay node access anchor node. The first node may be an OAM (operation, maintenance and management system), or may be a base station serving the relay node or a centralized unit of the base station, and the base station may be directly connected to the relay node, or may be connected to the first node through one or more other nodes (for example, the relay node is connected to the first node through a distribution unit of the base station, or is connected to the first node through one or more other relay nodes, or is connected to the first node through a distribution unit of the base station and one or more other relay nodes).

The embodiment of the present application provides a process for configuring, by a first node, relevant information of a relay node accessing an anchor node, where the process includes the following steps, as shown in fig. 6:

step 1 (configuring relay node): the first node sends a configuration message to the relay node a, where the configuration message configures the relay node access anchor node, and the message may be an RRC message or other types of messages.

It should be noted that the configuration message is a first configuration message.

Specifically, the configuration message includes at least one of the following information:

■ configuration information of an air interface when the relay node communicates with the first node, such as configuration information of a cell, carried configuration information, configuration information of a physical layer, configuration information of a MAC layer, configuration information of an R L C layer, configuration information of a PDCP layer, configuration information of an SDAP layer, and the like, may refer to contents in an RRCReconfiguration message in TS 38.331.

■, information about cells to which the distribution unit of the relay node or the relay node is connected, such as Cell identification information (NR CGI: NR Cell Global Identifier, ECGI: E-UTRAN Cell Global Identifier, PCI: Physical Cell Identifier, etc.), which provides the above information about each Cell when there are a plurality of cells to which the distribution unit of the relay node or the relay node is connected;

■ information about cells to which the relay node or the distribution unit of the relay node is allowed to access, such as Cell identification information (NR CGI: NR Cell Global Identifier, ECGI: E-UTRAN Cell Global Identifier, PCI: Physical Cell Identifier, etc.), which provides the above-mentioned information about each Cell when there are a plurality of cells to which the relay node is allowed to access;

■ address information of anchor node side, in the above configuration message, the first node also provides the relay node with address information of multiple anchor nodes, the multiple address information may belong to the same anchor node or different anchor nodes, these address information indicate the address information of anchor node side that the relay node can use when establishing connection with the anchor node, the relay node can select at least one of them to establish connection with the anchor node;

■ address information of the relay node side in the configuration message, the first node also provides the relay node with address information of a plurality of relay node sides, the address information indicates the address information of the relay node side which can be used by the relay node when establishing connection with the anchor node, and the relay node can select at least one of the address information to establish connection with the anchor node.

The information of the configuration message may also be used to indicate an association relationship between information, such as an access cell of the relay node, address information of a relay node side used when the relay node establishes a connection with the anchor node, address information of an anchor node side used when the relay node establishes a connection with the anchor node, and an association relationship between any two or three of the three. Optionally, when the relay node accesses the cell a, the address information of the anchor node side adopted by the relay node is address information B, and/or the address information of the relay node side adopted by the relay node is address information C. Alternatively, when the address information of the anchor node side adopted by the relay node is address information B, the address information of the relay node side adopted by the relay node is address information C. Alternatively, when the address information of the relay node side adopted by the relay node is the address information C, the address information of the anchor node side adopted by the relay node is the address information B.

It should be noted that the information on the cell to which the relay node or the distribution unit of the relay node is allowed to access is first information indicating the cell to which the relay node or the distribution unit of the relay node is allowed to access, and the information on the cell to which the relay node or the distribution unit of the relay node is allowed to access is second information indicating the cell to which the relay node or the distribution unit of the relay node is allowed to access.

Step 2 (establish connection): the relay node a establishes a connection with the anchor node. The anchor node may be a node different from the first node, or the first node, and the process includes at least one of the following processes:

procedure 1. the relay node selects a cell access supporting the relay node or the relay node's distributed unit access according to the configuration message in step 1, thereby establishing a connection of the relay node with the anchor node serving the cell, which in one embodiment may refer to the procedure of subscriber access network in L TE or 5G networks (see TS38.300, TS38.331, TS36.300, TS36.331, etc.).

And (2) a process: the relay node establishes a connection between the relay node and the anchor node according to the address information of the anchor node side and/or the relay node side contained in the configuration message in step 1, and in one embodiment, the established connection is an F1 interface between the distribution unit of the relay node and the concentration unit of the anchor node, and the process may refer to an establishment procedure of an F1 interface (see TS 38.473).

Optionally, before step 1, further comprising:

step 0 (indicating relay node): the second node transmits, to the first node, an instruction message indicating a relay node, the instruction message including at least instruction information indicating that the relay node a is a node supporting a relay function (IAB function), or instruction information indicating that the relay node a is an IAB node, and the instruction information may be displayed information or implicit information.

It should be noted that the indication message indicating the relay node is a first indication message.

The second node may be the relay node a, or may be a node (e.g., another relay node) accessed by the relay node a.

Specifically, when the second node is the relay node a, the indication message may be an RRC message (e.g., RRCSetupComplete, rrcreestablstringcomplete, RRCResumeComplete, rrcrecomFIG, see TS 38.331; e.g., rrcconnectionsettupcomplex, rrcconnectionseessablockompmplete, rrcconnectionsumecomplete, rrcconnectionseconfiguration complete, rrcconnectionsertonfiguration complete, see TS 36.331).

Specifically, when the second node is a node accessed by the relay node a, the indication Message may be an F1AP Message (for example, INITIA L U L RRC Message Transfer, see TS 38.473). further, before sending the indication Message indicating the relay node, the second node further has a procedure of obtaining the indication information.

Optionally, when the first node is an OAM or a base station serving the relay node a, in this embodiment, a process of configuring the relay node to establish a connection with the anchor node in the first aspect is provided (the first node and the anchor node are different nodes), and the process includes the following steps, as shown in fig. 7: step 1: the OAM/base station sends a configuration message to the relay node a that configures the relay node access anchor node, as in step 1 of fig. 6.

Step 2: the relay node a establishes a connection with the anchor node, as in step 2 in fig. 6.

Optionally, when the first node and the anchor node are the same node, in this embodiment, another process for configuring the relay node to establish a connection with the anchor node in the first aspect is provided, where the process includes the following steps, as shown in fig. 8:

step 0: relay node a sends a message to the base station/anchor node indicating the relay node, step 0 in fig. 6.

Step 1: the base station/anchor node sends a configuration message to relay node a that configures the relay node to access the anchor node, as in step 1 of fig. 6.

Step 2: relay node a establishes a connection with the base station/anchor node, as in step 2 of fig. 6.

Optionally, the first node is a centralized unit of a base station, the base station is an anchor node, the second node is a distribution unit of the base station or another relay node, and the relay node a accesses the first node through the distribution unit of the base station or another relay node (second node), in this embodiment of the present application, a further procedure for configuring a relay node to establish a connection with the anchor node is provided, where the procedure includes the following steps, as shown in fig. 9:

step 0: the distribution unit of the base station or other relay node (second node) sends a message indicating the relay node to the base station concentration unit, as in step 0 in fig. 6.

Step 1: the base station concentration unit (anchor node concentration unit) sends a configuration message to the relay node a, as in step 1 in fig. 6, configuring the relay node access anchor node.

Step 2: the relay node a establishes a connection with the base station concentrating unit (anchor node concentrating unit) as by step 2 in fig. 6.

Optionally, the first node is a centralized unit of a base station, the base station is not an anchor node, the second node is a distribution unit of the base station or another relay node, and the relay node a accesses the first node through the distribution unit of the base station or another relay node, in this embodiment of the present application, a further procedure for configuring a relay node to establish a connection with the anchor node is provided, where the procedure includes the following steps, as shown in fig. 10:

step 0: the base station distribution unit or other relay node sends a message indicating the relay node to the base station concentration unit, step 0 in fig. 6.

Step 1: the base station concentration unit sends a configuration message to the relay node a, as in step 1 in fig. 6, configuring the relay node access anchor node.

The effect of the above steps is that the relay node can access the anchor node according to the obtained configuration information.

In a second aspect of the present application: the relay node establishes a connection with another base station, which is an anchor node that the relay node needs to access. One possible scenario is that the relay node establishes a multi-connection with at least two base stations, one base station being the primary base station, the other base station or base stations being secondary base stations, and the anchor node being (at least) one of the secondary base stations. The connection between the relay node and the anchor node is realized through the information interaction between the main base station and the auxiliary base station and the information interaction between the main base station and the relay node. Another scenario is to handover the relay node to another base station (the other base station is an anchor node that the relay node needs to access), and establish a connection with the anchor node of the other base station.

The second aspect includes the following flow:

1. and configuring a relay node flow between the base stations.

The base station 1 is a first base station, and the base station 2 is a second base station.

The process of configuring the relay node between the base stations can be used for a process of adding the auxiliary base station to the relay node by the main base station, and can also be used for a process of switching the relay node to the target base station by the source base station.

As shown in fig. 11, the process of configuring the relay node between the base stations includes the following steps:

step 2-1-1: base station 1 (primary or source) sends to base station 2 (secondary or target) a request message 2-1-1 intended to provide base station 2 with relevant configuration information to serve relay node a, the configuration information provided by the message including at least one of:

■ relay node A's identification information.

■, indicating the Indication information of the relay node, the Indication information indicates that the user (i.e. relay node a) to which the request message 2-1-1 is directed is a relay node, or a node supporting the relay function, or a node allowing other users to access, such as IAB node Indication.

■ support identification information of the cell accessed by relay node a or the distribution element of relay node a.

■ allow identification information of cells that relay node A or the distribution unit of relay node A has access to.

■ the Request message for the relay node a (or the distribution unit of the relay node) to establish connection with the anchor node (or the concentration unit of the anchor node), which may be generated by the base station 1 itself, or may be generated by receiving information sent from the relay node a, the message includes configuration information related to the relay node a, such as identification information of one or more cells served by the relay node a, frequency point information of the cells, bandwidth information of the cells, system information of the cells generated by the relay node a, information related to measuring the cells, RRC version information of the distribution unit of the relay node a and/or the mobile terminal, and the like, and the specific contents may be referred to as F1Setup Request message in TS38.473, the Request message may be an F1Setup Request message, the F1Setup Request message may be included in message 2-1-1 in the form of a Container (Container), or may be included in element ie message 1-2 in F1Setup message, respectively.

■ address information of anchor node side, which can be address information of base station 2, or address information of base station 1 or other base stations.

■ relay node side address information, in one embodiment, the address information indicates that the anchor node only establishes a connection with one or more addresses indicated by the address information, in another embodiment, the address information may also be alternative relay node side address information (if alternative, indicates that the anchor node may establish a connection with any of the addresses in the address information).

■ the address information of the anchor node side and/or the address information of the relay node side used by the relay node A to establish the connection with the anchor node, the contents of the "address information of the anchor node side" and the "address information of the relay node side" can be referred to the above description.

It should be noted that the message 2-1-1 is a first request message.

Other contents contained in the message 2-1-1 can refer to SgNB Addition/Modification Request and Handover Request message in TS36.423, or S-Node Addition/Modification Request and Handover Request message in TS 38.423.

In addition, the above-mentioned "address information on the anchor node side" and "address information on the relay node side" may be included in the message 2-1-1 as separate IEs, may be included in the RRC container in the message 2-1-1, or may be included in the message 2-1-1 as an IE in the "Request message for the relay node a to establish a connection with the anchor node" (for example, included in the F1Setup Request message).

Step 2-1-2: the base station 2 sends a response message 2-1-2 to the base station 1, the message being a response message to the message 2-1-1, the message comprising at least one of the following information:

■ relay node A's identification information.

■ identification information of the base station 2, such as Global en-gNB ID, IAB donor ID, etc., the information may be included in the message 2-1-2 as an IE, or may be included in the RRC container sent to the relay node a.

■ a Response message of the relay node a (or a distribution unit of the relay node a) establishing connection with the anchor node (a concentration unit of the anchor node), the message including configuration information related to the anchor node, such as information (e.g., identification information, system information on the anchor node side, supportable P L MN list information) of the anchor node requesting the activated cell of the relay node a, which may be referred to as F1Setup Response message in TS38.473, the request message may be an F1Setup Response message, the F1Setup Response message may be included in messages 2-1-2 in the form of a Container (Container), or an IE in the F1Setup Response message may be included in messages 2-1-2, respectively, in an implementation manner, the Response message may include a message indicating that the relay node a failed in establishing connection with the anchor node, such as a Setup message 1 in TS 5634 pfaii, the Response message may be included in messages 1F 2-1-2 in the form of a Container (Container), or the Failure message may be included in messages 1F 1message in the form of a Container (Container).

■ address information of the anchor node side, the address information being address information of the base station 2. in one embodiment, the address information indicates that the relay node establishes a connection only with one or more addresses indicated by the address information.

■, and the reason information of the base station 2 replying the message 2-1-2, such as failure of the relay node A to establish a connection with the anchor node, failure of the F1 interface, failure of establishing the F1 interface with the relay node A, further, specific reasons for the failure, such as hardware error, software error, unpredictable error, insufficient resources to serve the new relay node, a problem with the link serving the relay node (such as radio link failure), and the link serving the relay node being recovered, further, the base station 2 may provide the waiting time information in the reply message 2-1-2, and the waiting time information may inform the base station 1 of at least the waiting time required before initiating the new message 2-1-1.

It should be noted that the message 2-1-2 is the first response message.

Other contents included in the message 2-1-2 can refer to SgNB Addition/Modification Response, Handover Request acknowledgement message in TS36.423, or S-nodeadition/Modification Response, Handover Request acknowledgement message in TS 38.423. In another embodiment, if the relay Node a fails to establish a connection with the anchor Node, or the base station 2 knows that the relay Node cannot establish an F1 interface with the anchor Node, other contents contained in the message 2-1-2 can be referred to as SgNB Addition/Modification Request, Handover prediction Failure message, or S-Node Addition/Modification Request message in TS38.423, Handover prediction Failure message.

In addition, the above-mentioned "address information on the anchor node side" and "address information on the relay node side" may be included in the message 2-1-2 as separate IEs, may be included in the RRC container in the message 2-1-1, or may be included in the message 2-1-2 as an IE in the "request message for the relay node a to establish connection with the anchor node", for example, in the F1Setup Response message.

Optionally, before step 2-1-1, further comprising: step 2-1-0: the relay node a sends a message 2-1-0 to the base station 1, the message being used for the relay node a to provide the base station 1 with information about the serving relay node a, the message comprising at least one of the following information:

■ A Request message generated by the relay node A (or the distribution unit of the relay node A) to establish a connection with the anchor node (or the concentration unit of the anchor node), such as F1Setup Request message (see TS38.473), which may be contained in the message 2-1-0 in the form of a Container (Container), or the IE in the F1Setup Request message may be contained in the message 2-1-0, respectively.

■ address information on the anchor node side, in one embodiment, the address information indicates that the relay node only establishes connection with one or more addresses indicated by the address information, in another embodiment, the address information may also be address information on the alternative anchor node side or anchor nodes (if alternative, indicates that the relay node may establish connection with any address in the address information), the anchor node represented by the address information may belong to base station 1, base station 2 or other base stations.

It should be noted that the message 2-1-0 is the second request message.

The message may be an existing RRC message (e.g., Measurement report, ueassistanceinformation, U L information transfer, etc.), or may be a new RRC message (e.g., F1MessageTransfer), or may be an F1Setup Request message.

In addition, the above-mentioned "address information of the anchor node side" and "address information of the relay node side" may be contained in the message 2-1-0 as separate IEs, as in the F1Setup Request message.

Optionally, after step 2-1-2, further comprising:

step 2-1-3: the base station 1 sends a message 2-1-3 to the relay node a, the message being used to configure the relay node a, the message comprising at least one of the following information:

■ Anchor node, which is the anchor node of the base station 2, such as F1Setup Response/Failure message (see TS38.473), or the message may be contained in the messages 2-1-3 in the form of a Container (Container) or the IE in the F1Setup Response/Failure message may be contained in the messages 2-1-3, respectively, and the message may be received by the base station 1 from the base station 2 or generated by the base station 1.

■ identification information of the base station 2, such as Global en-gNB ID, IAB donor ID, etc., the information may be included in the message 2-1-3 as an IE, or may be included in the RRC container sent to the relay node a.

■ wait for time information telling the relay node A that it needs to wait before initiating a connection with the base station 2, or at least the time relay node A needs to wait before initiating a connection with the centralized unit of the base station 2 to establish the F1 interface further, the wait time may be that received by the base station 1 in step 2-1-2.

The message may be an existing RRC message (e.g., rrcreeconfiguration, D L InformationTransfer, etc.), or may be a new RRC message (e.g., F1MessageTransfer), or may be an F1Setup Response/Failure message.

It should be noted that the messages 2-1-3 are second configuration messages.

In addition, in the above steps (steps 2-1-0,2-1-1,2-1-2,2-1-3), "address information on the anchor node side" and/or "address information on the relay node side" may be included in the message of each step (e.g., messages 2-1-0,2-1-1,2-1-2,2-1-3) as a separate IE, or may be included in the F1Setup Request/Response/Failure message, that is, may include address information on the anchor node side "and/or" address information on the relay node side "in addition to the content included in the F1Setup Request/Response/Failure message defined in TS 38.473.

Optionally, after step 2-1-3, the method further includes that the relay node a establishes an association with the anchor node according to the address information ("address information on the anchor node side" and/or "address information on the relay node side") obtained in the above process, for example, establishes a TN L association according to the SCTP protocol.

After the above steps, the relay node a may establish a dual connection with the base station 1 and the base station 2, or the relay node a is handed over from the base station 1 to the base station 2, and the relay node a and the base station 2 (anchor node) exchange relevant information (e.g. information related to the establishment of the F1 interface) required for establishing the F1 interface, and establish a connection (e.g. the establishment of the F1 interface) between the distribution unit of the relay node a and the base station 2 (anchor node).

2. And (5) information exchange process between base stations.

The process of interacting information between base stations is mainly used for interacting the relevant information whether the relay node supports the access of the network between the two base stations. Relay node access networks require that the base station be able to establish a connection with the relay node (e.g. the distribution unit of the relay node establishes a connection with the concentration unit of the base station, such as the F1 interface), only to ensure that the relay node can serve other users. In practical networks not every base station supports access to the relay node, since some base stations cannot establish a connection with the distribution unit of the relay node. The procedure is used to indicate whether the base station has the capability to allow the relay node to access the network (or the capability to allow the distribution unit of the relay node to access the base station).

Taking the base station 1 and the base station 2 as an example, as shown in fig. 12, the flow of the interaction information between the base stations includes the following two steps:

step 2-2-1: the base station 1 sends a message 2-2-1 to the base station 2, the message comprising at least one of the following information:

■ indicates whether the base station 1 supports or allows the access of the relay node (or the distribution unit of the relay node), such as supporting or allowing the access of the relay node, and not supporting or not allowing the access of the relay node.

■ address information of the anchor node side used when the relay node establishes a connection with the base station 1, the connection is the connection established between the relay node (or the distribution unit of the relay node) and the base station 1 (or the concentration unit of the base station 1), such as F1 interface.

■ address information on the relay node side used when the relay node establishes a connection with the base station 1, the connection being established between the relay node (or the distribution unit of the relay node) and the base station 1 (or the concentration unit of the base station 1), such as an F1 interface.

■ indication information whether the serving cell of the base station 1 supports or allows access by the relay node (or the distribution unit of the relay node), the indication information includes at least one of the following information for a serving cell or a group of cells of the base station 1:

■ identification information of a cell, if a group of cells, including identification information of each cell in the group of cells;

■ indication information of whether the cell supports or allows relay node access;

■, such as RACH Configuration information (see RACH-Configuration common in TS 38.331) for the relay node accessing the cell, Configuration information (such as Configuration information of SSB) for the synchronization signal of the relay node accessing the cell, Configuration information (such as Measurement Timing Configuration) for the relay node measuring the cell, which may be used to indicate the Configuration information used when measuring the cell, such as Configuration information used by the relay node, which is included in the Configuration information, the base station 2 may know that the cell of the base station 1 can support or allow the access of the relay node.

■ address information of the anchor node side used by the relay node accessing the cell when establishing connection with the base station 1, the connection is the connection established between the relay node (or the distribution unit of the relay node) and the base station 1 (or the concentration unit of the base station 1), such as F1 interface;

■ when establishing connection with the anchor node of the base station 1, the relay node accessing the cell uses the address information of the relay node side, where the connection is established between the relay node (or the distribution unit of the relay node) and the base station 1 (or the concentration unit of the base station 1), such as F1 interface.

■ indication information of whether the neighbor serving cell of the base station 1 supports or allows the relay node (or the distribution unit of the relay node) to access, the indication information includes at least one of the following information for one neighbor serving cell or a group of neighbor cells of the base station 1:

■ when the relay node accessing the cell establishes a connection with the base station serving the cell, the connection is the connection established between the relay node (or the distribution unit of the relay node) and the base station serving the neighbor cell (or the concentration unit of the base station), such as the F1 interface;

■ when the relay node accessing the cell establishes a connection with the base station serving the cell, the connection is the connection established between the relay node (or the distribution unit of the relay node) and the base station (or the concentration unit of the base station) serving the neighbor cell, such as the F1 interface.

It should be noted that the message 2-2-1 is a third request message.

Step 2-2-2: the base station 2 sends a message 2-2-2 to the base station 1, the message comprising at least one of the following information:

■ indicates whether the base station 2 supports or allows the access of the relay node (or the distribution unit of the relay node), such as supporting or allowing the access of the relay node, and not supporting or not allowing the access of the relay node.

■ address information on the anchor node side used when the relay node establishes a connection with the base station 2, the connection being established between the relay node (or the distribution unit of the relay node) and the base station 2 (or the concentration unit of the base station 2), such as an F1 interface.

■ address information on the relay node side used when the relay node establishes a connection with the anchor node of the base station 2, the connection being established between the relay node (or the distribution unit of the relay node) and the base station 2 (or the concentration unit of the base station 2), such as an F1 interface.

■ indication information of whether the serving cell of the base station 2 supports or allows the relay node access, the indication information includes at least one of the following information for a serving cell or a group of cells of the base station 2:

■ address information of the anchor node side used by the relay node accessing the cell when establishing connection with the base station 2, the connection is the connection established between the relay node (or the distribution unit of the relay node) and the base station 2 (or the concentration unit of the base station 2), such as F1 interface;

■ the relay node accessing the cell uses the address information of the relay node side when establishing a connection with the base station 2, the connection is the connection established between the relay node (or the distribution unit of the relay node) and the base station 2 (or the concentration unit of the base station 2), such as F1 interface.

■ indication information of whether the neighbor serving cell of the base station 2 supports relay node access, the indication information includes at least one of the following information for one neighbor serving cell or a group of neighbor cells of the base station 2:

It should be noted that the message 2-2-2 is a third response message.

The above flow can refer to the relevant flow in X2/Xn, such as X2/Xn Setup flow, EN-DC/NG-RAN node configuration Update flow, see TS36.423, TS 38.423.

In addition, when a base station includes a central unit and a distribution unit, the interaction process between the central unit and the distribution unit may also be used to indicate whether to support the relay node access, as shown in fig. 13, the flow of the information interaction between the distribution unit of the base station and the central unit of the base station includes the following steps:

step 2-2-3: the base station distribution unit sends a message 2-2-3 to the base station concentration unit, the message comprising at least one of the following information:

■ indicating information indicating whether the distribution unit of the base station supports or allows the access of the relay node (or the distribution unit of the relay node), such as supporting or allowing the access of the relay node, and not supporting or not allowing the access of the relay node.

■ information indicating whether the serving cell of the distribution unit of the base station supports or allows access by the relay node (or the distribution unit of the relay node), the information comprising at least one of the following for a cell or a group of cells served by the distribution unit:

■ indication of whether the cell supports or allows relay node access.

■ information indicating whether the neighbor serving cell of the distribution unit of the base station supports or allows access by the relay node (or the distribution unit of the relay node), the information comprising at least one of the following information for a neighbor cell or a group of neighbor cells of the distribution unit of the base station:

■ indication of whether the cell supports or allows relay node access.

Step 2-2-4: the base station concentration unit sends a response message 2-2-4 to the distribution unit of the base station, the message including at least one of the following information:

■ indicating information indicating whether the centralized unit of the base station supports or allows the access of the relay node (or the distributed unit of the relay node), such as supporting or allowing the access of the relay node, and not supporting or not allowing the access of the relay node.

■ indicating information of whether other cells of the central unit of base stations (which are not served by the distributed unit of base stations sending messages 2-2-3) support relay node access, the indicating information comprising, for a cell or a group of cells, at least one of:

■ indication of whether the cell supports or allows relay node access.

■ indicating information whether a neighbor cell of the central unit of the base station supports or allows access by the relay node (or a distribution unit of the relay node), the indicating information including at least one of the following information for a neighbor cell or a group of neighbor cells:

■ indication of whether the cell supports or allows relay node access.

The above flow can refer to the relevant flow in F1, such as F1Setup flow, gNB-CU/gNB-DUConfiguration Update flow, see TS 38.473.

Through the above procedures, it can be determined whether the serving cell of the base station supports or allows access of the relay node (or the distribution unit of the relay node), so as to help the base station select an appropriate other base station to serve the relay node, and ensure that the relay node (or the distribution unit of the relay node) can establish a connection (such as F1 connection) with the base station (i.e. the anchor node), so as to allow the relay node to serve other users.

3. And the relay node provides auxiliary information to the base station.

In the process of providing the auxiliary information to the base station by the relay node, the auxiliary information provided by the relay node for the base station can help the base station to select other base stations serving the relay node. The procedure may help the base station to select an appropriate secondary base station to establish dual or multi-connectivity for the relay node and let the relay node (or the distribution unit of the relay node) establish connectivity (e.g., F1 connectivity) with the secondary base station (i.e., the anchor node). The process may also assist the base station to handover the relay node to an appropriate target base station, so as to allow the base station to serve the relay node, and allow the relay node to establish a connection (e.g. F1 connection) with the base station (i.e. anchor node), as shown in fig. 14, where the process of providing the auxiliary information to the base station by the relay node includes the following steps:

step 2-3-1: the relay node A sends a message 2-3-1 to the base station, wherein the message at least comprises one of the following information:

■ indicates the indication information of the relay node, indicates that the relay node a is a node supporting the relay function (IAB function), or indicates that the relay node a is an IAB node.

■, such as Cell identification information (NR CGI: NR Cell Global Identifier, ECGI: E-UTRAN Cell Global Identifier, PCI: Physical Cell Identifier, etc.), which provides the above information on each Cell when there are a plurality of cells supporting access by the relay node (or the distribution unit of the relay node).

■, such as Cell identification information (NR CGI: NR Cell Global Identifier, ECGI: E-UTRAN Cell Global Identifier, PCI: Physical Cell Identifier, etc.), which provides the above-mentioned information about each Cell when there are a plurality of cells to which the relay node (or the distribution unit of the relay node) is allowed to access.

■ address information of anchor node side, which indicates the address information of anchor node side used by the relay node A to access the anchor node, the information may include address information of one or more anchor node sides, and the multiple address information may belong to the same anchor node or different anchor nodes.

■ relay node side address information indicating the relay node side address information used by the relay node a to access the anchor node.

The message 2-3-1 may be an existing RRC message, such as ueassistanceinformation, U L information transfer, or may be a new RRC message.

It should be noted that the information on the cell supporting the access of the relay node (or the distribution unit of the relay node) is third information on the cell supporting the access of the relay node (or the distribution unit of the relay node), and the information on the cell allowing the access of the relay node (or the distribution unit of the relay node) is fourth information on the cell allowing the access of the relay node (or the distribution unit of the relay node).

Through the process, the base station can obtain the relevant information of the relay node, and help the base station to configure the relay node to discover the accessible anchor node or configure the relay node to access the anchor node.

4. The base station distribution unit or other relay nodes accessed by the relay node provides the auxiliary information flow to the base station (the centralized unit of the base station).

In the procedure of providing the auxiliary information to the base station (the concentration unit of the base station) by the base station distribution unit or other relay nodes to which the relay node is accessed, the auxiliary information provided by the base station (the concentration unit of the base station) by the base station distribution unit or other relay nodes can help the base station to select other base stations serving the relay node. The procedure may help the base station to select an appropriate secondary base station to establish dual or multi-connectivity for the relay node and let the relay node (or the distribution unit of the relay node) establish connectivity (e.g., F1 connectivity) with the secondary base station (i.e., the anchor node). The process may also assist the base station to handover the relay node to an appropriate target base station, so as to let the target base station serve the relay node, and let the relay node establish a connection (e.g. F1 connection) with the target base station (i.e. anchor node), as shown in fig. 14a, the process of providing the base station with the assistance information by the base station distribution unit or other relay nodes accessed by the relay node includes the following steps:

step 2-4-1: the base station distribution unit or other relay nodes accessed by the relay node A sends a message 2-4-1 to the base station, wherein the message at least comprises one of the following information:

The Message 2-4-1 may be an existing F1AP Message, such as an Initial U L RRC Message Transfer, or a new F1AP Message.

Further, the base station distribution unit or other relay nodes accessed by the relay node a have a process of obtaining information related to the message 2-4-1 before sending the message 2-4-1. An embodiment of the process is to determine whether the relay node a is a node supporting a relay function (IAB function) according to resources (such as random access resources, configuration of random access pilot (Preamble), and the like) used when the relay node a accesses the distribution unit of the base station or other relay nodes.

The above-described processes defined in the second aspect of the present application may be executed individually or collectively.

In one embodiment, the base station 1 selects a suitable base station 2 according to the auxiliary information provided by the relay node a, and interacts with the selected base station 2, so as to configure the relay node a to establish a connection with the base station 2 (i.e., an anchor node), as shown in fig. 15.

Step a: the relay node a provides the base station 1 with assistance information, see step 2-3-1 of the second aspect of the application.

Step b: the relay node a sends information to the base station 1 regarding establishing a connection with the anchor node, see step 2-1-0 of the second aspect of the application.

Step c: based on the assistance information received in step a and/or b, the base station 1 may select a suitable base station, such as base station 2, and the base station 1 sends a connection establishment request to the base station 2, see step 2-1-1 of the second aspect of the present application.

Step d: the base station 2 sends a connection establishment response to the base station 1, see step 2-1-2 of the second aspect of the application.

Step e: the base station 1 configures the relay node, see steps 2-1-3 of the second aspect of the application.

Step f, the relay node A establishes TN L association with the anchor node of the base station 2.

In another embodiment, information related to supporting relay node access is interacted between the base station 1 and the base station 2, then the base station 1 selects a suitable base station 2 according to the information and the information sent by the relay node, and interacts with the selected base station 2, so as to configure the relay node a to establish a connection with an anchor node of the base station 2, as shown in fig. 16.

Step a: the base station 1 sends an information interaction request message to the base station 2, see step 2-2-1 of the second aspect of the present application.

Step b: the base station 2 sends an information interaction response message to the base station 1, see step 2-2-2 of the second aspect of the application.

Step c: the relay node a sends information to the base station 1 regarding establishing a connection with the anchor node, see step 2-1-0 of the second aspect of the application.

Step d: based on the information received in steps a and/or b and/or c, the base station 1 may select a suitable base station, such as base station 2, and the base station 1 sends a connection establishment request to the base station 2, see step 2-1-1 of the second aspect of the present application.

Step e: the base station 2 sends a connection establishment response to the base station 1, see step 2-1-2 of the second aspect of the application.

Step f: the base station 1 configures the relay node, see steps 2-1-3 of the second aspect of the application.

Step g, the relay node A establishes TN L association with the anchor node of the base station 2.

EXAMPLE five

Based on the same inventive concept of the foregoing embodiment, an initial access apparatus is further provided in the embodiment of the present application, and is applied to a relay node, a schematic structural diagram of the apparatus is shown in fig. 17, and the initial access apparatus 50 includes a first receiving module 501 and an establishing module 502.

A first receiving module 501, configured to receive a first configuration message;

an establishing module 502 is configured to establish a connection with the anchor node according to the first configuration message.

Specifically, the first configuration message includes at least one of:

first information indicating a cell supporting access of the relay node (or a distribution unit of the relay node), second information indicating a cell allowing access of the relay node (or a distribution unit of the relay node), address information of an anchor node side, address information of a relay node side.

Specifically, the anchor node is of any one of the following types:

Optionally, the establishing module 502 is specifically configured to select a cell supporting the relay node access according to at least one of the first information of a cell supporting the relay node (or a distribution unit of the relay node) access and the second information of a cell allowing the relay node (or a distribution unit of the relay node) access, and establish a connection with an anchor node serving the cell.

Optionally, the establishing module 502 is specifically configured to establish a connection with the anchor node according to at least one address information of the anchor node side and the address information of the relay node side.

identification information of the anchor node, identification information of a cell served by the anchor node, an IP address of the anchor node side, an MAC address of the anchor node side, and SCTP flow identification information.

EXAMPLE six

Based on the same inventive concept of the foregoing embodiments, the present embodiment further provides another initial access apparatus, which is applied to the first node, and a schematic structural diagram of the apparatus is shown in fig. 18, where the initial access apparatus 60 includes a second receiving module 601 and a first sending module 602.

A second receiving module 601, configured to receive a first indication message, where the first indication message includes indication information indicating that a node to which the first indication message is directed is a relay node;

a first sending module 602, configured to send a first configuration message to the relay node according to the indication information, so that the relay node is accessed to the anchor node;

Specifically, the first node is of any one of the following types:

Specifically, the indication information indicating that the node to which the first indication message is directed is the relay node includes at least one of:

indication information indicating that the node to which the first indication message is directed is a node supporting a relay function, and indication information indicating that the node to which the first indication message is directed is an access IAB node.

EXAMPLE seven

Based on the same inventive concept of the foregoing embodiments, the present embodiment further provides another initial access apparatus, which is applied to the first base station, and the structural schematic diagram of the apparatus is shown in fig. 19, where the initial access apparatus 70 includes a second sending module 701 and a third receiving module 702.

A second sending module 701, configured to send a first request message to a second base station, where the first request message includes configuration information for accessing the relay node to the second base station;

a third receiving module 702, configured to receive the first response message sent by the second base station, so as to establish a connection between the relay node and the second base station.

Specifically, the configuration information includes at least one of:

identification information of the relay node, indication information indicating the relay node, identification information of a cell supporting access of the relay node or a distribution unit of the relay node, identification information of a cell allowing access of the relay node or the distribution unit of the relay node, address information of an anchor node side of a request message generated by the relay node or the distribution unit of the relay node to establish connection with an anchor node or a concentration unit of the anchor node, address information of the relay node side, address information of the anchor node side used for establishing connection between the relay node and the anchor node, and/or address information of the relay node side, wherein the anchor node is the second base station.

the method comprises the steps of identification information of the relay node, response information of connection establishment between the anchor node or a centralized unit of the anchor node and the relay node or a distributed unit of the relay node, address information of the anchor node side, address information of the relay node side, address information of the anchor node side and/or address information of the relay node side and reason information, wherein the response information is generated by the anchor node and used for establishing connection between the relay node and the anchor node.

The embodiment of the present application further provides another initial access apparatus, which is applied to the first base station, and a schematic structural diagram of the apparatus is shown in fig. 20, and the initial access apparatus 80 includes a third request message module 801 and a third response message module 802.

A third request message module 801, configured to send a third request message to the second base station, so as to indicate whether the first base station has a capability of allowing the relay node or the distribution unit of the relay node to access the network;

a third response message module 802, configured to receive a third response message sent by the second base station, so as to indicate whether the second base station has a capability of allowing the relay node or the distribution unit of the relay node to access the network.

Specifically, the third request message includes at least one of:

the information comprises indication information indicating whether the first base station supports the access of the relay node or the distribution unit of the relay node, address information used by the relay node to the first base station when the relay node establishes connection with the first base station, address information used by the relay node when the relay node establishes connection with the first base station, indication information indicating whether a service cell of the first base station supports the access of the relay node or the distribution unit of the relay node, and indication information indicating whether a neighbor service cell of the first base station supports the access of the relay node or the distribution unit of the relay node.

Specifically, the third response message includes at least one of:

For the content that is not described in detail in the initial access device provided in the embodiment of the present application, reference may be made to the method for initial access, and the beneficial effects that the initial access device provided in the embodiment of the present application can achieve are the same as those of the method for initial access, which are not described herein again.

Example eight

An embodiment of the present application provides a relay device, including: a processor; and a memory configured to store machine readable instructions that, when executed by the processor, cause the processor to perform the method of initial access described above.

An embodiment of the present application provides a first node device, including: a processor; and a memory configured to store machine readable instructions that, when executed by the processor, cause the processor to perform the method of initial access described above.

It should be noted that the first node device is any one of the following types: an operation, maintenance and management system (OAM), a base station, a centralized unit of the base station, an anchor node, and a centralized unit of the anchor node.

An embodiment of the present application provides a base station device, including: a processor; and a memory configured to store machine readable instructions that, when executed by the processor, cause the processor to perform the method of initiating access described above.

The application of the embodiment of the application has at least the following beneficial effects:

It will be understood by those within the art that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. Those skilled in the art will appreciate that the computer program instructions may be implemented by a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, implement the aspects specified in the block or blocks of the block diagrams and/or flowchart illustrations disclosed herein.

Those of skill in the art will appreciate that the various operations, methods, steps in the processes, acts, or solutions discussed in this application can be interchanged, modified, combined, or eliminated. Further, other steps, measures, or schemes in various operations, methods, or flows that have been discussed in this application can be alternated, altered, rearranged, broken down, combined, or deleted. Further, steps, measures, schemes in the prior art having various operations, methods, procedures disclosed in the present application may also be alternated, modified, rearranged, decomposed, combined, or deleted.

The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.

Claims

1. An initial access method applied to a relay node is characterized by comprising the following steps:

receiving a first configuration message;

establishing connection with an anchor node according to the first configuration message;

the first configuration message includes at least one of:

2. The method of claim 1, wherein the address information of the anchor node side comprises at least one of:

3. The method of claim 1, wherein the address information of the relay node side comprises at least one of the following:

4. A method for initial access, applied to a first node, includes:

receiving a first indication message, wherein the first indication message comprises indication information indicating that a node for which the first indication message is directed is a relay node;

according to the indication information, sending a first configuration message to the relay node for the relay node to access an anchor node;

5. A method for initial access, applied to a first base station, includes:

sending a first request message to a second base station, wherein the first request message comprises configuration information for accessing a relay node to the second base station;

and receiving a first response message sent by the second base station for establishing connection between the relay node and the second base station.

6. The method of claim 5, wherein the information carried by the configuration information comprises at least one of:

7. The method of claim 6, wherein the information carried by the first response message comprises at least one of:

8. A method for initial access, applied to a first base station, includes:

9. The method of claim 8, wherein the third request message comprises at least one of:

the indication information indicates whether the first base station supports the access of the relay node or the distribution unit of the relay node, the address information used by the relay node when the relay node establishes connection with the first base station, the indication information whether the serving cell of the first base station supports the access of the relay node or the distribution unit of the relay node, and the indication information whether the neighbor serving cell of the first base station supports the access of the relay node or the distribution unit of the relay node.

10. An initial access apparatus applied to a relay node, comprising:

a first receiving module, configured to receive a first configuration message;

11. An apparatus for initial access, applied to a first node, comprising:

a first sending module, configured to send a first configuration message to the relay node according to the indication information, so that the relay node is accessed to an anchor node;

12. An apparatus for initial access, applied to a first base station, comprising:

a second sending module, configured to send a first request message to a second base station, where the first request message includes configuration information for accessing a relay node to the second base station;

a third receiving module, configured to receive the first response message sent by the second base station, so as to establish a connection between the relay node and the second base station.

13. An apparatus for initial access, applied to a first base station, comprising:

14. A relay device, comprising: a processor; and

a memory configured to store machine readable instructions that, when executed by the processor, cause the processor to perform the method of initial access of any of claims 1-3.

15. A base station apparatus, comprising: a processor; and

a memory configured to store machine readable instructions that, when executed by the processor, cause the processor to perform the method of initial access of any of claims 4-9.