WO2016155132A1

WO2016155132A1 - Method and system for coordination between terminal small cells, and terminal

Info

Publication number: WO2016155132A1
Application number: PCT/CN2015/082922
Authority: WO
Inventors: 张云飞; 雷艺学; 张晨璐; 马莉
Original assignee: 宇龙计算机通信科技(深圳)有限公司
Priority date: 2015-03-31
Filing date: 2015-06-30
Publication date: 2016-10-06
Also published as: CN104717685A; CN105722115A; CN105722115B

Abstract

Proposed are a method for coordination between terminal small cells, a system for coordination between terminal small cells, and a terminal, which are used for establishing coordination among a plurality of terminal small cells. The method comprises: determining whether coordination is established between a first terminal small cell and a second terminal small cell; if the coordination between the first terminal small cell and the second terminal small cell is established, starting a detection process of a D2D link between the first terminal small cell and the second terminal small cell; and establishing an X2d interface between the first terminal small cell and the second terminal small cell between which the detection process of the D2D link is started. By means of the technical solution of the present invention, high efficiency coordination between terminal small cells can be realized.

Description

Method, system and terminal for cooperation between terminalized cells

This application claims the priority of the Chinese Patent Application filed on March 31, 2015, the Chinese Patent Application No. CN201510148682.5, and the invention titled "Collaboration Method and System between Terminals and Terminals". This is incorporated herein by reference.

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method for cooperation between terminalized cells, a cooperation system between terminalized cells, and a terminal.

Background technique

At present, with the use of dense networking, operators' investment in infrastructure networks continues to increase, operators' profits are declining, and the deployment of dense networking itself is very difficult. 5G (Fifth-generation, fifth-generation mobile communication technology) network will support a large number of terminals and connections, but while providing greater support capacity, it also needs to reduce the load on the core network, and at the same time support more flexible deployment. . Existing small cells have shortcomings in addressing the above technical challenges, such as deployment flexibility, deployment cost, and application scenario constraints. Therefore, the industry has begun to study a scheme for providing small cell access based on a terminal, that is, a terminalized cell T-SC (Terminal-Small Cell).

Existing small cell solutions include Femtocell (flying cell) and Picocell (mainly to solve indoor wireless coverage problems in specific areas). The implementation of this scheme requires a wired backhaul (signal tunnel) and needs to maintain the cell (cell) to the S1, S5 interface on the core network side. Therefore, the existing small cell solution cannot reduce the number of connections from the terminal to the control plane of the core network. At the same time, access to the EPC (Evolved Packet Core) in this architecture is only applicable to the areas where these cells are deployed. For areas where the network coverage is not good enough to provide wireless coverage or cannot provide backhaul, Or in the case of moving vehicles (and the vehicle itself does not provide hotspot coverage), these scenarios cannot be used. The existing solution also includes a MiFi (Portable Broadband Wireless Device) router, which is based on a WLAN (Wireless Local Area Networks) unlicensed band, but is easily interfered so that QoS (Quality of Service) is difficult to guarantee.

Based on the prior art scheme, when multiple terminalized cells T-SC are in the proximity range, the cooperation between the cells is based on the traditional X2 interface mode (the interconnection interface between the e-NodeBs (eNBs, evolved base stations), Supporting the direct transmission of data and signaling, there is a problem of redundant routing, and it also needs to occupy the radio resources of the macro network, which is disadvantageous for coordination between T-SCs and communication of terminals across T-SCs. ,As shown in Figure 1.

Therefore, how to achieve high-efficiency cooperation between T-SC cells has become a technical problem to be solved at present.

Summary of the invention

The present invention is based on the above problems, and proposes a new technical solution, which can realize high-efficiency cooperation between terminalized cells (T-SCs), that is, can reduce cooperation between terminalized cells to macro network radio resources. Dependency, and the problem of excessive delay caused by too many network elements passing through the X2 interface.

In view of this, an aspect of the present invention provides a method for cooperation between terminalized cells, for establishing cooperation between multiple terminalized cells, including: determining a first terminalized cell and a second terminalized cell. Whether to establish cooperation; if the first terminalized cell and the second terminalized cell have established cooperation, start a detection process of the D2D link between the first terminalized cell and the second terminalized cell Establishing an X2d interface between the first terminalized cell and the second terminalized cell of the detected process of the D2D link that has been initiated.

In this technical solution, when it is determined that cooperation has been established between any two of the plurality of terminalized cells, a D2D (Device to Device) chain between the two terminalized cells is started. The path detection process and the establishment of an X2d interface between the two terminalized cells, wherein the X2d interface is an interconnection interface between the base stations different from the X2 interface, so that efficient cooperation between the terminalized cells can be achieved. That is, it is possible to reduce the dependence of the cooperation between the terminalized cells on the radio resources of the macro network, and solve the problem of excessive delay caused by too many network elements passing through the X2 interface.

In the technical solution, the first terminalized cell is any one of the plurality of terminalized cells, and the second terminalized cell is any one of the plurality of terminalized cells except the first terminalized cell. .

In this technical solution, the detection process of the D2D link between two terminalized cells may adopt an enhanced D2D discovery process and a D2D synchronization mechanism.

In the above technical solution, preferably, the detecting process of the D2D link is a two-way detecting process.

In the technical solution, the detection process of the D2D link is a two-way detection process, which can effectively ensure that the X2d interface established between the first terminalized cell and the second terminalized cell is bidirectionally reachable, thereby implementing the terminalized cell. Efficient collaboration between the two.

In the foregoing technical solution, the detecting process of the D2D link between the first terminalized cell and the second terminalized cell is specifically configured to: separately acquire the first terminalized cell and Link parameters of the second terminalized cell to initiate a detection process of the D2D link.

In this technical solution, the link parameters required for the D2D link to be established by the first terminalized cell and the second terminalized cell are separately obtained, and the link parameters may not be completely dependent on the pre-configuration, that is, may be performed according to actual conditions. Real-time configuration to meet the real-time needs of users, link parameters include: time-frequency resources, protocol processing parameters, and whether to start security processing parameters.

In this technical solution, if the network resources used by the D2D communication are the same frequency as the macro network, it is necessary to allocate different times between different two terminalized cells of the plurality of terminalized cells distributed in one area. The frequency resource establishes a D2D link to facilitate coordination of interference between D2D links.

In the above technical solution, preferably, the establishing an X2d interface between the first terminalized cell and the second terminalized cell of the detected process of the D2D link that is started, specifically includes: Negotiating between the first terminalized cell and the terminalized cell to determine a TNL (Transport Network Layer) layer address of the X2d interface; and the first terminalized cell for control signaling on the X2d interface The TNL layer address of the side and the TNL layer address of the second terminalized cell side respectively set a terminal identifier of the terminalized cell.

In this technical solution, an X2d interface is established between two terminalized cells having a link parameter, and a TNL (Transport Network Layer) layer address of the X2d interface can be negotiated between two terminalized cells. The TNL layer address may be in the format of IPv4 (Internet Protocol Version 4, 4th Edition Internet Protocol) or IPv6 (Internet Protocol Version 6, 6th Edition Internet Protocol) address, but the related art is establishing X2. The TNL layer address is different from the local network management entity in the interface. The TNL layer address in the present technical solution has only local significance, and the TNL layer address and the second terminal side of the first terminalized cell side for control signaling on the X2d interface. The TNL layer address of the terminalized cell needs to use the UE (User Equipment) identifier of the terminalized cell, and if the X2d interface is to forward data packets, it also needs to be used. The terminal identifier of the terminalized cell is used as the address of the next hop.

In the foregoing technical solution, before the establishing the X2d interface between the first terminalized cell and the second terminalized cell, the method further includes: determining the first terminalized cell and the second Whether the D2D link between the terminalized cells is set with a security mechanism; when it is determined that the security mechanism is not set, the first terminalized cell and the second terminalized are established in the process of establishing the X2d interface Security association between cells.

In this technical solution, by determining whether the D2D pass-through link between the two terminalized cells has been set with other security mechanisms, such as a group-based security mechanism, before establishing an X2d interface between the terminalized cells, if it is determined that there is , it can be considered that the communication between the two terminalized cells is trusted, so that it is not necessary to establish a security association. If it is determined to be none, it is necessary to establish an X2d interface between the terminalized cells. Security associations to ensure reliable communication between terminalized cells.

In this technical solution, when it is required to establish a security association between the terminalized cells, the security association may be established by the terminalized cells in a negotiated manner, or the security association may be established by obtaining parameters from the macro base station without using the SeGW. (Security Gateway, Security Gateway) Obtain the parameter configuration of the security association to further improve the communication reliability between the terminalized cells.

Another aspect of the present invention provides a cooperation system between terminalized cells for establishing cooperation between a plurality of terminalized cells, including: a first determining module, configured to determine a first terminalized cell and a second Whether the cooperation between the terminalized cells is established, and the initiating module is configured to start the first terminalized cell and the second terminalized cell if the first terminalized cell and the second terminalized cell have established cooperation a detecting process of the D2D link between the first terminal module and the second terminalized cell for establishing an X2d interface between the first terminalized cell and the second terminalized cell of the detected D2D link .

In the technical solution, the first terminalized cell is one of a plurality of terminalized cells. The second terminalized cell is any one of the plurality of terminalized cells except the first terminalized cell.

In the above technical solution, preferably, the starting module includes: an acquiring module, configured to respectively acquire link parameters of the first terminalized cell and the terminalized cell, to start the detecting process of the D2D link .

In the above technical solution, preferably, the first terminalized cell and the terminalized cell negotiate to determine a TNL (Transport Network Layer) layer address of the X2d interface; and the first establishing module includes: an identifier a module, configured to separately set the TNL layer address of the first terminalized cell side for control signaling and the TNL layer address of the second terminalized cell side on the X2d interface The terminal identifier of the cell.

In this technical solution, an X2d interface is established between two terminalized cells having a link parameter, and a TNL (Transport Network Layer) layer address of the X2d interface can be negotiated between two terminalized cells. The TNL layer address may be in the format of IPv4 (Internet Protocol Version 4, 4th Edition Internet Protocol) or IPv6 (Internet Protocol Version 6, 6th Edition Internet Protocol) address, but the related art is establishing X2. When the interface requests the TNL layer address to be different from the related network management entity, the TNL layer address in the technical solution only has In a local sense, the TNL layer address of the first terminalized cell side and the TNL layer address of the second terminalized cell side for the control signaling on the X2d interface need to use the UE (User Equipment, Terminal) identifier of the terminalized cell. And if the data packet is to be forwarded on the X2d interface, the terminal identifier of the terminalized cell is also used as the address of the next hop.

In the above technical solution, the method further includes: a second determining module, configured to determine the first terminal before establishing an X2d interface between the first terminalized cell and the second terminalized cell Whether the D2D link between the cell and the second terminalized cell is configured with a security mechanism; the second establishing module is configured to establish, during the process of establishing the X2d interface, when determining that the security mechanism is not set a security association between the first terminating cell and the second terminating cell.

In still another aspect of the present invention, a terminal is provided, including a processor and a memory, wherein the memory stores a set of program codes, and the processor is configured to invoke program code stored in the memory for performing the following operations :

Determining whether cooperation is established between the first terminalized cell and the second terminalized cell; if the first terminalized cell and the second terminalized cell have established cooperation, starting the first terminalized cell and the first A process of detecting a D2D link between two terminalized cells; establishing an X2d interface between the first terminalized cell and the second terminalized cell of the detected process of the D2D link that has been initiated.

In the above technical solution, preferably, the processor starts a detection process of a D2D link between the first terminalized cell and the second terminalized cell, and specifically includes:

Obtaining link parameters of the first terminalized cell and the second terminalized cell, respectively, to start The detection process of the D2D link.

In the above technical solution, preferably, the processor establishes an X2d interface between the first terminalized cell and the second terminalized cell of the detected process of the D2D link that has been started, and specifically includes:

Negotiating between the first terminalized cell and the second terminalized cell to determine a TNL layer address of the X2d interface; and, for the first terminalized cell for control signaling on the X2d interface The TNL layer address of the side and the TNL layer address of the second terminalized cell side respectively set a terminal identifier of the terminalized cell.

In the above technical solution, before the processor establishes an X2d interface between the first terminalized cell and the second terminalized cell, the processor further includes:

Determining whether the D2D link between the first terminalized cell and the second terminalized cell is set with a security mechanism; when determining that the security mechanism is not set, in establishing the X2d interface, establishing a A security association between the first terminalized cell and the second terminated cell.

With the technical solution of the present invention, high-efficiency cooperation between terminalized cells can be achieved, that is, the dependence of the cooperation between the terminalized cells on the radio resources of the macro network can be reduced, and the number of network elements passing through the X2 interface is too large. The problem of excessive delay.

DRAWINGS

FIG. 1 is a schematic diagram of a cooperation scheme between terminalized cells based on an X2 interface in the related art;

2 is a flow chart showing a method of cooperation between terminalized cells according to an embodiment of the present invention;

3 shows a schematic diagram of an X2d interface for cooperation between terminalized cells based on D2D links, in accordance with one embodiment of the present invention;

FIG. 4 is a schematic diagram of a cooperation scheme between terminalized cells based on an X2d interface according to an embodiment of the present invention.

Figure 5 shows a block diagram of a collaboration system between terminalized cells in accordance with one embodiment of the present invention;

Figure 6 shows a block diagram of a terminal in accordance with one embodiment of the present invention.

detailed description

The above described objects, features and advantages of the present invention will become more apparent from the detailed description of the appended claims. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a full understanding of the invention, but the invention may be practiced otherwise than as described herein. Limitations of the embodiments.

FIG. 2 is a flow chart showing a method of cooperation between terminalized cells according to an embodiment of the present invention.

As shown in FIG. 2, a method for cooperation between terminalized cells according to an embodiment of the present invention is used to establish cooperation between multiple terminalized cells, including: Step 202, determining a first terminalized cell and a second Whether the cooperation between the terminalized cells is established; in step 204, if the first terminalized cell and the second terminalized cell have established cooperation, start between the first terminalized cell and the second terminalized cell The detecting process of the D2D link; step 206, establishing an X2d interface between the first terminalized cell and the second terminalized cell of the detected process of the D2D link that has been started.

In the foregoing technical solution, the step 204 specifically includes: acquiring link parameters of the first terminalized cell and the second terminalized cell, respectively, to start the detection process of the D2D link.

In the foregoing technical solution, preferably, the step 206 includes: determining, by the first terminalized cell and the terminalized cell, a TNL (Transport Network Layer) layer address of the X2d interface; The TNL layer address of the first terminalized cell side and the TNL layer address of the second terminalized cell side for controlling signaling on the X2d interface respectively set terminal identifiers of the terminalized cell.

In this technical solution, an X2d interface is established between two terminalized cells having a link parameter, and a TNL (Transport Network Layer) layer address of the X2d interface can be negotiated between two terminalized cells. The TNL layer address may be in the format of IPv4 (Internet Protocol Version 4, 4th Edition Internet Protocol) or IPv6 (Internet Protocol Version 6, 6th Edition Internet Protocol) address, but the related art is establishing X2. The TNL layer address is different from the local network management entity in the interface. The TNL layer address in the present technical solution has only local significance, and the TNL layer address and the second terminal side of the first terminalized cell side for control signaling on the X2d interface. The TNL layer address of the terminalized cell needs to use the UE (User Equipment) identifier of the terminalized cell, and if the data packet is to be forwarded on the X2d interface, the terminal identifier of the terminalized cell is also used as the address of the next hop. .

In the above technical solution, preferably, before the step 206, the method further includes: determining the first Whether the D2D link between the terminalized cell and the second terminalized cell is set with a security mechanism; when it is determined that the security mechanism is not set, the first terminalization is established in the process of establishing the X2d interface A security association between the cell and the second terminating cell.

The finally established X2d interface is established on the D2D link between the two terminalized cells. Specifically, the cooperation scheme between the terminalized cells based on the X2d interface is as shown in FIG. 4.

Figure 5 shows a block diagram of a collaboration system between terminalized cells in accordance with one embodiment of the present invention.

As shown in FIG. 5, a collaboration system 500 between terminalized cells according to an embodiment of the present invention is used to establish cooperation between multiple terminalized cells, including: a first determining module 502, configured to determine the first Whether the cooperation between the terminalized cell and the second terminalized cell is established; the initiating module 504 is configured to start the first terminalized cell and if the first terminalized cell and the second terminalized cell have established cooperation a process of detecting a D2D link between the second terminalized cells; a first establishing module 506, configured to: in the first terminalized cell and the second of the detected process of the D2D link that has been initiated An X2d interface is established between the terminalized cells.

In the foregoing technical solution, the activation module 504 includes: an obtaining module 5042, configured to acquire link parameters of the first terminalized cell and the terminalized cell, respectively, to start the D2D link. Detection process.

In the above technical solution, preferably, the first terminalized cell and the terminalized cell negotiate to determine a TNL (Transport Network Layer) layer address of the X2d interface; and the first establishing module 506 includes: The identifier module 5062 is configured to separately set the TNL layer address of the first terminalized cell side for control signaling and the TNL layer address of the second terminalized cell side on the X2d interface. The terminal identifier of the terminalized cell.

In this technical solution, an X2d interface is established between two terminalized cells having a link parameter, and a TNL (Transport Network Layer) layer address of the X2d interface can be negotiated between two terminalized cells. The TNL layer address may be in the format of IPv4 (Internet Protocol Version 4, 4th Edition Internet Protocol) or IPv6 (Internet Protocol Version 6, 6th Edition Internet Protocol) address, but the related art is establishing X2. Interface time The TNL layer address in the present technical solution is only local, and the TNL layer address and the second terminalized cell on the first terminalized cell side of the X2d interface are used for control signaling. The TNL layer address of the side needs to use the UE (User Equipment) identifier of the terminalized cell, and if the data packet is to be forwarded on the X2d interface, the terminal identifier of the terminalized cell is also used as the address of the next hop.

In the foregoing technical solution, the method further includes: a second determining module 508, configured to determine the first before establishing an X2d interface between the first terminalized cell and the second terminalized cell Whether the D2D link between the terminalized cell and the second terminalized cell is configured with a security mechanism; the second establishing module 510 is configured to: when determining that the security mechanism is not set, in the process of establishing the X2d interface Establishing a security association between the first terminalized cell and the second terminalized cell.

In still another aspect of the present invention, a terminal is provided. As shown in FIG. 6, the terminal 6 may include at least one processor 61, such as a CPU, at least one communication bus 62, and a memory 63. The communication bus 62 is implemented. The connection communication between these components; the memory 63 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory. A set of program codes is stored in the memory 63, and the processor 61 is configured to call the program code stored in the memory 63 to perform the following operations:

Determining whether cooperation is established between the first terminalized cell and the second terminalized cell;

And if the first terminalized cell and the second terminalized cell have established cooperation, starting a detection process of a D2D link between the first terminalized cell and the second terminalized cell;

Establishing an X2d interface between the first terminalized cell and the second terminalized cell of the detected process of the D2D link that has been initiated.

In the foregoing technical solution, the processor 61 is configured to initiate a detection process of the D2D link between the first terminalized cell and the second terminalized cell, and specifically includes:

Obtaining link parameters of the first terminalized cell and the second terminalized cell respectively to initiate a detection process of the D2D link.

In the foregoing technical solution, preferably, the processor 61 establishes an X2d interface between the first terminalized cell and the second terminalized cell of the detected process of the D2D link that has been started, specifically including :

Negotiating between the first terminalized cell and the second terminalized cell to determine a TNL layer address of the X2d interface;

Setting a terminal identifier of the terminalized cell for the TNL layer address of the first terminalized cell side and the TNL layer address of the second terminalized cell side for control signaling on the X2d interface .

In the foregoing technical solution, before the processor 61 establishes an X2d interface between the first terminalized cell and the second terminalized cell, the processor 61 further includes:

Determining whether the D2D link between the first terminalized cell and the second terminalized cell is configured with a security mechanism;

When it is determined that the security mechanism is not set, in the process of establishing the X2d interface, establishing a security association between the first terminalized cell and the second terminalized cell.

The technical solution of the present invention is described in detail above with reference to the accompanying drawings, and a problem is proposed in which the cooperation between the terminalized cells in the related art is based on the redundant routing existing in the X2 interface mode and the wireless resources occupying the macro network. The cooperation method between the new terminalized cells can achieve high-efficiency cooperation between the terminalized cells, that is, the dependence of the cooperation between the terminalized cells on the radio resources of the macro network can be reduced, and the network elements passing through the X2 interface can be solved too. The problem caused by too much delay is too large.

In the present invention, the terms "first" and "second" are used for the purpose of description only, and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A method for cooperation between terminalized cells, which is used to establish cooperation between multiple terminalized cells, and includes:

Determining whether cooperation is established between the first terminalized cell and the second terminalized cell;

And if the first terminalized cell and the second terminalized cell have established cooperation, starting a detection process of a D2D link between the first terminalized cell and the second terminalized cell;

Establishing an X2d interface between the first terminalized cell and the second terminalized cell of the detected process of the D2D link that has been initiated.
The method for cooperating between terminalized cells according to claim 1, wherein the detecting process of the D2D link is a two-way detecting process.
The method for the cooperation between the terminalized cells according to claim 2, wherein the detecting the D2D link between the first terminalized cell and the second terminalized cell includes: :

Obtaining link parameters of the first terminalized cell and the second terminalized cell respectively to initiate a detection process of the D2D link.
The method for cooperating between terminalized cells according to claim 1, wherein the first terminalized cell and the second terminalized cell of the detected process of the D2D link that has been activated Establish an X2d interface, including:

Negotiating between the first terminalized cell and the second terminalized cell to determine a TNL layer address of the X2d interface;

Setting a terminal identifier of the terminalized cell for the TNL layer address of the first terminalized cell side and the TNL layer address of the second terminalized cell side for control signaling on the X2d interface .
The method for cooperating between terminalized cells according to any one of claims 1 to 4, wherein before the X2d interface is established between the first terminalized cell and the second terminalized cell ,Also includes:

Determining whether the D2D link between the first terminalized cell and the second terminalized cell is configured with a security mechanism;

When it is determined that the security mechanism is not set, in the process of establishing the X2d interface, establishing a security association between the first terminalized cell and the second terminalized cell.
A collaboration system between terminalized cells is used to establish cooperation between multiple terminalized cells, and is characterized in that:

a first determining module, configured to determine whether a collaboration is established between the first terminalized cell and the second terminalized cell;

a startup module, configured to start a detection process of a D2D link between the first terminalized cell and the second terminalized cell, if the first terminalized cell and the second terminalized cell have established cooperation ;

And a first establishing module, configured to establish an X2d interface between the first terminalized cell and the second terminalized cell of the detected process of the D2D link that has been started.
The cooperation system between terminalized cells according to claim 6, wherein the detection process of the D2D link is a two-way detection process.
The collaboration system between the terminalized cells according to claim 7, wherein the startup module comprises:

And an acquiring module, configured to acquire link parameters of the first terminalized cell and the second terminalized cell, respectively, to initiate a detection process of the D2D link.
The cooperation system between terminalized cells according to claim 6, wherein

Negotiating between the first terminalized cell and the second terminalized cell to determine a TNL layer address of the X2d interface;

The first establishing module includes:

An identifier module, configured to separately set a terminal for the TNL layer address of the first terminalized cell side and the TNL layer address of the second terminalized cell side for control signaling on the X2d interface The terminal identifier of the cell.
The collaboration system between the terminalized cells according to any one of claims 6 to 9, further comprising:

a second determining module, configured to determine, between the first terminalized cell and the second terminalized cell, an X2d interface between the first terminalized cell and the second terminalized cell Whether the D2D link is provided with a security mechanism;

And a second establishing module, configured to establish a security association between the first terminalized cell and the second terminalized cell in the process of establishing the X2d interface, when determining that the security mechanism is not set.
A terminal, comprising: a processor and a memory, wherein the memory stores a set of program codes, and the processor is configured to call program code stored in the memory for performing the following operations:

Determining whether cooperation is established between the first terminalized cell and the second terminalized cell;

And if the first terminalized cell and the second terminalized cell have established cooperation, starting a detection process of a D2D link between the first terminalized cell and the second terminalized cell;

Establishing an X2d interface between the first terminalized cell and the second terminalized cell of the detected process of the D2D link that has been initiated.
The terminal according to claim 11, wherein the detecting process of the D2D link is a two-way detecting process.
The terminal according to claim 12, wherein the processor starts a detection process of a D2D link between the first terminalized cell and the second terminalized cell, and specifically includes:

Obtaining link parameters of the first terminalized cell and the second terminalized cell respectively to initiate a detection process of the D2D link.
The terminal according to claim 11, wherein the processor establishes an X2d interface between the first terminalized cell and the second terminalized cell of the detected process of the D2D link that has been activated. Specifically, including:

Negotiating between the first terminalized cell and the second terminalized cell to determine a TNL layer address of the X2d interface;

Setting a terminal identifier of the terminalized cell for the TNL layer address of the first terminalized cell side and the TNL layer address of the second terminalized cell side for control signaling on the X2d interface .
The terminal according to any one of claims 11 to 14, wherein before the processor establishes an X2d interface between the first terminalized cell and the second terminalized cell, the processor further includes:

Determining whether the D2D link between the first terminalized cell and the second terminalized cell is configured with a security mechanism;

When it is determined that the security mechanism is not set, in the process of establishing the X2d interface, establishing a security association between the first terminalized cell and the second terminalized cell.