CN110582120B

CN110582120B - Multi-stage relay networking method and device

Info

Publication number: CN110582120B
Application number: CN201810596804.0A
Authority: CN
Inventors: 魏立梅; 范晨; 袁乃华; 江森; 熊兵
Original assignee: Chengdu TD Tech Ltd
Current assignee: Chengdu TD Tech Ltd
Priority date: 2018-06-11
Filing date: 2018-06-11
Publication date: 2022-07-08
Anticipated expiration: 2038-06-11
Also published as: CN110582120A

Abstract

The application provides a method and a device for multi-stage relay networking, wherein the method comprises the following steps: the method comprises the steps that a current-stage network device receives an RN subframe configuration request and a downlink subframe measurement result sent by an RN, and determines RN subframe configuration suitable for a return link between the current-stage network device and the RN according to the downlink subframe measurement result and an uplink subframe measurement result obtained by the current-stage network device; sending RN subframe configuration suitable for a return link to the RN; the RN determines an uplink subframe and a downlink subframe used on the return link according to the received RN subframe configuration of the return link, and sends and receives information on the return link at the corresponding uplink subframe and the corresponding downlink subframe; the RN starts a cell of the RN and starts a function of hanging down the RN in the cell established by the RN, so that the RN can be hung down; the function of multi-stage relay networking is realized. The current-stage network equipment is a DeNB or an RN with the function of hanging down the RN.

Description

Multi-stage relay networking method and device

Technical Field

The present application relates to communications technologies, and in particular, to a method and an apparatus for multi-stage relay networking.

Background

For extending coverage, a Third Generation partnership Project (3 GPP) protocol employs a Relay technology in an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) system, fig. 1 is a schematic diagram of a Relay networking architecture, and as shown in fig. 1, the 3GPP protocol defines a Relay Node (RN) and a donor eNB (Doner eNB, DeNB for short, or Evolved Node B, eNB for short). In fig. 1, a Mobility Management Entity (MME) and a Serving Gateway (S-GW) are network elements in an Evolved Packet Core (EPC).

As shown in fig. 1, the RN accesses to a cell of the DeNB, and information interaction between the RN and the DeNB is performed through a Un interface. The Un interface is a radio interface. The DeNB acts as S1/X2 proxy of the RN, and forwards S1 information and X2 information between the RN and the relevant network element through two logical interfaces S1 and X2 on the Un interface: on one hand, the DeNB forwards S1/X2 information from the RN to the EPC/other eNBs through a logical interface S1/X2, and on the other hand, the DeNB forwards S1/X2 information sent by the EPC/other eNBs to the RN through a logical interface S1/X2. User equipment (User equipment, UE for short) in the RN cell accesses the RN cell through the Uu interface. The RN receives uplink information of the UE from the Uu interface, transmits the information to the DeNB through a logical interface S1 on the Un interface, and the DeNB transmits the information to the EPC. The EPC sends downlink information of the UE to the DeNB, the DeNB transmits the information to the RN through a logical interface S1 on a Un interface, and the RN transmits the information to the UE through a Uu interface.

The RN defined by the 3GPP protocol is an in-band RN, and cannot transmit/receive information on the Uu interface while receiving/transmitting information on a backhaul link (a link between the RN and the DeNB is referred to as a backhaul link). Therefore, the 3GPP protocol defines RN subframe configuration on the backhaul link: the RN transmits/receives information on the backhaul link on the UL/DL subframe designated in the RN subframe configuration. In the RN cell, the RN configures DL subframes used on the backhaul link as MBSFN subframes so that UEs in the RN cell do not perform measurement in these subframes. An uplink subframe or a downlink subframe used by the RN when receiving uplink information from the UE or sending downlink information to the UE at a Uu interface needs to avoid the uplink subframe or the downlink subframe used by the RN and the DeNB during communication on a backhaul link.

Currently, the 3GPP protocol only supports level 1 (hop) in-band relay, does not support multi-level (hop) out-of-band relay, and does not support multi-level (hop) hybrid relay.

However, the extension of network coverage by the primary relay is limited. In an actual networking scenario, there is a need for RN cascade and interconnection, that is: there are multi-level (hop) in-band relay networking scenarios, multi-level (hop) out-of-band relay networking scenarios, and multi-level (hop) hybrid relay networking scenarios.

Therefore, how to implement multi-level (hop) relay networking in an actual networking scene is a problem which needs to be solved urgently.

Disclosure of Invention

The application provides a multistage relay networking method and device, which are used for solving the problems of multistage (hop) in-band relay networking, multistage (hop) out-of-band relay networking and multistage (hop) mixed relay networking required in an actual networking scene.

In a first aspect, the present application provides a multi-stage relay networking method, applied to a network device, including:

receiving an RN subframe configuration request and a downlink subframe measurement result of a downlink subframe sent by an RN in a cell established by the RN, wherein the RN subframe configuration request represents that the RN request acquires RN subframe configuration suitable for a backhaul link between the network equipment and the RN, the downlink subframe is a downlink subframe in a downlink subframe set, the downlink subframe set comprises downlink subframes corresponding to different RN subframe configurations, and the RN subframe configuration is each RN subframe configuration corresponding to a cell type of the cell; determining an access object as the RN according to the RN subframe configuration request;

measuring an uplink subframe corresponding to the cell type of the cell of the network equipment to obtain an uplink subframe measurement result;

determining an RN subframe configuration applicable to a backhaul link between the network equipment and the RN according to the downlink subframe measurement result and the uplink subframe measurement result;

and sending RN subframe configuration suitable for the return link to the RN through special signaling so that the RN receives the special signaling, determining an uplink subframe and a downlink subframe used on the return link according to the RN subframe configuration carried in the special signaling, and sending a response message to the network equipment, wherein the response message represents that the RN completes related configuration according to the special signaling, and starts a function of hanging the RN under a cell established by the RN so as to allow a next-stage RN to access the cell established by the RN.

In a second aspect, the present application provides a multi-stage relay networking method, which is applied to a relay node RN, and includes:

sending an RN subframe configuration request and a downlink subframe measurement result of a downlink subframe to network equipment, wherein the RN subframe configuration request represents that the RN request acquires RN subframe configuration applicable to a backhaul link between the network equipment and the RN, the downlink subframe is a downlink subframe in a downlink subframe set, the downlink subframe set comprises downlink subframes corresponding to different RN subframe configurations, and the RN subframe configuration is each RN subframe configuration corresponding to a cell type of a cell of the network equipment;

receiving RN subframe configuration which is sent by the network equipment through dedicated signaling and is suitable for a backhaul link between the network equipment and the RN, wherein the RN subframe configuration which is suitable for the backhaul link between the network equipment and the RN is determined by the network equipment according to the downlink subframe measurement result and a self-acquired uplink subframe measurement result;

determining an uplink subframe and a downlink subframe used on a backhaul link between the network device and the RN according to an RN subframe configuration applicable to the backhaul link between the network device and the RN;

sending a response message to the network equipment, wherein the response message represents that the RN completes related configuration according to the special signaling;

and establishing a cell of the RN, and starting a function of hanging down the RN in the cell established by the RN so as to allow the next-stage RN to access the cell established by the RN.

In a third aspect, the present application provides a multi-stage relay networking device on a network device side, including:

a receiving module, configured to receive, in a cell established by the receiving module, an RN subframe configuration request sent by an RN and a downlink subframe measurement result of a downlink subframe, where the RN subframe configuration request represents that the RN request obtains an RN subframe configuration applicable to a backhaul link between the network device and the RN, the downlink subframe is a downlink subframe in a downlink subframe set, the downlink subframe set includes downlink subframes corresponding to different RN subframe configurations, and the RN subframe configuration is each RN subframe configuration corresponding to a cell type of the cell;

a first determining module, configured to determine, according to the RN subframe configuration request, that an access object is an RN;

a measurement module, configured to measure an uplink subframe corresponding to a cell type of a cell of the network device to obtain an uplink subframe measurement result;

a second determining module, configured to determine, according to the downlink subframe measurement result and the uplink subframe measurement result, an RN subframe configuration applicable to a backhaul link between the network device and the RN;

a first sending module, configured to send, through a dedicated signaling, an RN subframe configuration applicable to the backhaul link to the RN, so that the RN receives the dedicated signaling, determine, according to the RN subframe configuration carried in the dedicated signaling, an uplink subframe and a downlink subframe used on the backhaul link, and send a response message to the network device, where the response message indicates that the RN completes a relevant configuration according to the dedicated signaling, and starts a function of suspending the RN in a cell established by itself to allow a next-stage RN to access the cell established by itself.

In a fourth aspect, the present application provides a multi-stage relay networking device on an RN side, including:

a first sending module, configured to send an RN subframe configuration request and a downlink subframe measurement result of a downlink subframe to a network device, where the RN subframe configuration request indicates that the RN request obtains an RN subframe configuration applicable to a backhaul link between the network device and the RN, the downlink subframe is a downlink subframe in a downlink subframe set, the downlink subframe set includes downlink subframes corresponding to different RN subframe configurations, and the RN subframe configuration is each RN subframe configuration corresponding to a cell type of a cell of the network device;

a first receiving module, configured to receive an RN subframe configuration, sent by the network device through dedicated signaling, that is applicable to a backhaul link between the network device and the RN, where the RN subframe configuration applicable to the backhaul link between the network device and the RN is determined by the network device according to the downlink subframe measurement result and a self-obtained uplink subframe measurement result;

a first determining module, configured to determine, according to an RN subframe configuration applicable to a backhaul link between the network device and the RN, an uplink subframe and a downlink subframe used on the backhaul link between the network device and the RN;

a second sending module, configured to send a response message to the network device, where the response message indicates that the RN completes related configuration according to the dedicated signaling;

and the starting module is used for establishing the cell of the RN and starting the function of hanging the RN down in the cell established by the RN so as to allow the next-stage RN to access the cell established by the RN.

According to the multi-stage relay networking method and device, when a network device discovers a cell of a new RN accessed to the RN, the network device can be a DeNB or the RN, if the network device allows the new RN to access the cell of the network device, the network device determines RN subframe configuration used on a return link with the new RN, and the RN subframe configuration is used for the new RN to receive information or send information on the return link between the new RN and the network device; the network equipment sends the RN subframe configuration to the new RN, and the new RN can receive information or send information on a return link between the new RN and the network equipment according to the received RN subframe configuration; then, the new RN starts the established cell of the RN and starts the function of hanging down the RN in the cell, so that the network equipment can hang down the RN, and the new RN also has the function of hanging down the RN, namely the new RN can allow the next-level RN to access the established cell of the RN; the function of multi-stage relay networking is realized.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic diagram of a relay networking architecture;

fig. 2 is a schematic diagram of a multi-stage relay networking architecture;

fig. 3 is a signaling diagram of a multi-stage relay networking method according to an embodiment of the present application;

fig. 4 is a signaling diagram of another multi-stage relay networking method according to an embodiment of the present application;

fig. 5 is a flowchart of another multi-stage relay networking method according to an embodiment of the present application;

fig. 6 is a flowchart of another multi-stage relay networking method according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a multi-stage relay networking device on a network device side according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of another multi-stage relay networking device on a network device side according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a multi-stage relay networking device at an RN side according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of another multi-stage relay networking device on an RN side according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of an RN according to an embodiment of the present application.

With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the application, as detailed in the claims that follow.

The 3GPP protocol only supports one-level in-band relay, and cannot realize multi-level relay networking. The application provides a method and a device for multi-stage relay networking, and aims to solve the technical problem that multi-stage relay networking cannot be achieved in the prior art.

Fig. 2 is a schematic diagram of a multi-stage relay networking architecture, and the multi-stage relay networking method and apparatus provided in the present application may be applied to the multi-stage relay networking architecture shown in fig. 2. As shown in fig. 2, in the multi-stage relay networking architecture, at least one first-stage RN is connected below the DeNB, so that the first-stage RN is connected with the DeNB through a Un interface, the second-stage RN is connected with the first-stage RN through a Un interface, the third-stage RN is connected with the second-stage RN through a Un interface, and so on, each-stage RN is connected with the previous-stage RN through a Un interface. At least one user equipment is connected under each level of RN, so that the user equipment in the coverage range of each level of RN is accessed to the level of RN through a Uu interface; each stage of RN receives uplink information sent by the connected user equipment through a Uu interface, wherein the uplink information comprises uplink service data and uplink control information; and each grade of RN transmits uplink information to the previous grade of RN or DeNB through a Un interface. Each level of RN receives downlink information sent to the user equipment from the previous level of RN or DeNB through a Un interface, wherein the downlink information comprises downlink service data and downlink control information; and each grade of RN sends the downlink information to the user equipment through a Uu interface. The function of the Un interface between each level of RN and the previous level of RN is completely the same as that of the Un interface between the first level of RN and the DeNB: two logic interfaces are also arranged on the Un interface, the two logic interfaces are S1 and X2 respectively, and the upper-level RN proxies the S1/X2 function of the current-level RN on the logic interface. Based on the multi-stage relay networking architecture shown in fig. 2, the present application provides the following multi-stage relay networking method and apparatus.

The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.

Fig. 3 is a signaling diagram of a multi-stage relay networking method according to an embodiment of the present application. As shown in fig. 3, the method provided by the present application is applied to a network device and an RN accessing any cell established by the network device, where the network device is a DeNB or a DeRN (doner RN), where the DeRN is called a donor RN and the DeRN is an RN with a function of hanging down the RN, and the method includes:

step S11, the network device receives, in a cell established by itself, an RN subframe configuration request and a measurement result of a downlink subframe, where the RN subframe configuration request represents that the RN request obtains an RN subframe configuration applicable to a backhaul link between the network device and the RN, the downlink subframe is a downlink subframe in a downlink subframe set, the downlink subframe set includes downlink subframes corresponding to different RN subframe configurations, and the RN subframe configuration is each RN subframe configuration corresponding to a cell type of the cell.

In this embodiment, for example, if the current network device is a DeNB, the RN is a first-level RN that is accessed to any cell established by the DeNB; if the current network equipment is the Nth-level DeRN in the multi-level relay networking architecture, the RN is the (N + 1) th-level RN of any cell established by accessing the RN, and N is a positive integer greater than or equal to 2.

Before step S11, the RN needs to determine the cell to be accessed: the RN determines the type of a cell to be accessed according to the self-capability, and determines a downlink subframe set according to the determined type of the cell to be accessed, wherein the downlink subframe set is a downlink subframe corresponding to each RN subframe configuration corresponding to the determined cell type; the RN searches surrounding cells of corresponding types according to the determined cell type and acquires signal quality information of the cell with the function of hanging down the RN in the cells of corresponding types; and the RN determines the cell to be accessed according to the signal quality information of the cell with the function of hanging down the RN.

Specifically, the 3GPP protocol defines various RN subframe configurations supported by a Long Term Evolution (LTE) Frequency Division Duplex (FDD) cell and an LTE Time Division Duplex (TDD) cell, and a downlink subframe and an uplink subframe corresponding to each RN subframe configuration, respectively. The RN may be a single mode RN, i.e. the RN only supports LTE FDD cells or LTE TDD cells; the RN may also be a multimode RN, that is, the RN supports both an LTE FDD cell and an LTE TDD cell, and at this time, the RN can only access one type of cell at the same time. After the RN determines the cell type needing to be accessed, the RN determines a downlink subframe set according to RN subframe configuration corresponding to the cell type, wherein the downlink subframe set comprises at least one downlink subframe. Then, the RN searches surrounding cells of corresponding types, and acquires signal quality information of the cells, wherein the cells are all cells with the function of hanging down the RN. And the RN determines the cell needing to be accessed according to the signal quality information of the cells, namely determines the cell to be accessed.

And after the RN determines the cell to be accessed, the RN measures the downlink subframe of the cell to be accessed to obtain the measurement result of the downlink subframe. The downlink subframe is a subframe in a downlink subframe set, and the downlink subframe set comprises downlink subframes corresponding to each RN subframe configuration corresponding to the cell type of the cell to be accessed.

Then, the RN sends an RN subframe configuration request and a measurement result of a downlink subframe to a network device establishing the cell in the cell to be accessed. Specifically, when the RN accesses to the cell established by the network device, the RN carries the RN subframe configuration request in the corresponding message, and reports the measurement result of the downlink subframe to the network device. For example, the RN sends a Radio Resource Control (RRC) connection establishment completion message to the network device, where the RRC connection establishment completion message includes both an RN subframe configuration request and a measurement result of a downlink subframe; or, the RN sends the measurement result of the downlink subframe to the network device by using an independent message, such as: and the RN carries the measurement result of the downlink subframe through the measurement report message.

Step S12, the network device determines that the access object is RN according to the RN subframe configuration request.

In this embodiment, for example, after receiving the RN subframe configuration request, the network device may determine that the access object is an RN.

Step S13, measuring an uplink subframe corresponding to the cell type of the cell of the network device, to obtain an uplink subframe measurement result.

In this embodiment, for example, the network device determines each uplink subframe that can be used by the backhaul link according to the cell type of the cell established by the network device, and the network device obtains the measurement result of the uplink subframes by itself. Preferably, the measurement result is interference power of the uplink subframes.

Step S14, the network device determines, according to the downlink subframe measurement result and the uplink subframe measurement result obtained by itself, an RN subframe configuration applicable to the backhaul link between the network device and the RN.

In this embodiment, for example, the network device determines, according to the uplink subframe measurement result, an uplink subframe applicable to a backhaul link, where the backhaul link is a backhaul link between the network device and the RN; the network equipment determines a downlink subframe suitable for a backhaul link according to a downlink subframe measurement result; then, the network device determines the RN subframe configuration applicable to the backhaul link according to the uplink subframe and the downlink subframe applicable to the backhaul link.

Step S15, the network device sends the RN subframe configuration applicable to the backhaul link to the RN through dedicated signaling.

In this embodiment, for example, the network device sends the RN subframe configuration applicable to the backhaul link and determined in step S14 to the RN through dedicated signaling. Specifically, the dedicated signaling carries other parameters for backhaul link communication in addition to RN subframe configuration information.

Step S16, the RN receives the dedicated signaling, and determines the uplink subframe and the downlink subframe used on the backhaul link between the network device and the RN according to the RN subframe configuration carried in the dedicated signaling.

Step S17, the RN sends a response message to the network device, where the response message indicates that the RN completes the relevant configuration according to the dedicated signaling.

In this embodiment, for example, the RN stores RN subframe configuration information in the received dedicated signaling and other parameters, and determines an uplink subframe and a downlink subframe used on the backhaul link according to the RN subframe configuration information. And the RN sends a response message to the network equipment to represent and complete corresponding configuration.

Preferably, the dedicated signaling is a RN reconfiguration message, and the response message is a RN reconfiguration complete message. And the other parameters are related parameters carried in the RN reconfiguration message.

The RN may determine, according to the received RN subframe configuration, an uplink subframe and a downlink subframe used by a backhaul link of the RN; and the RN may receive downlink information and transmit uplink information on the backhaul link. Specifically, the RN monitors a Relay Physical Downlink Control Channel (R-PDCCH for short) on the determined Downlink subframe to capture uplink or Downlink scheduling information sent to the RN by the network device. The RN receives the corresponding PDSCH according to the captured downlink scheduling information, and transmits a corresponding Physical Uplink Shared Channel (PUSCH for short) according to the captured Uplink scheduling information.

Step S18, the RN starts its own cell, and starts the function of hanging down the RN in the started cell to allow the next-level RN to access the cell established by the RN itself.

Specifically, after the RN starts a function of hanging down the RN in a cell established by itself, the RN measures an uplink subframe corresponding to each RN subframe configuration corresponding to the cell type according to the cell type of the cell established by itself, so that when a next-stage RN accesses to the cell of the current RN, the current RN determines, according to a measurement result of the uplink subframe obtained by itself, a measurement result of a downlink subframe reported by the next-stage RN, and the cell type of the cell, an RN subframe configuration adopted on a backhaul link between the RN and the next-stage RN to implement communication between the RN and the next-stage RN. The measurement result of the uplink subframe is preferably the interference power of each uplink subframe.

The method provided by the embodiment is suitable for an in-band multi-stage relay networking architecture, an out-of-band multi-stage relay networking architecture, a multi-stage (hop) relay hybrid networking architecture and the like.

In this embodiment, an RN sends, to a network device, an RN subframe configuration request and a measurement result of a downlink subframe in a cell established by the network device, where the RN subframe configuration request represents that the RN request obtains an RN subframe configuration applicable to a backhaul link between the RN and the network device, the downlink subframe is a downlink subframe in a downlink subframe set, the downlink subframe set includes downlink subframes corresponding to different RN subframe configurations, and the RN subframe configuration is each RN subframe configuration corresponding to a cell type of a cell to which the RN is accessed; the network equipment determines that the access object is the RN according to the RN subframe configuration request; determining RN subframe configuration suitable for a return link according to a measurement result of a downlink subframe, a measurement result of an uplink subframe and a cell type of a cell; and sending the RN subframe configuration suitable for the backhaul link to the RN so that the RN determines an uplink subframe and a downlink subframe used on the backhaul link. Then, the RN establishes a cell of the RN, and starts a function of hanging down the RN in the cell of the RN, so that the RN becomes network equipment corresponding to the cell of the RN. When the RN which becomes the network equipment discovers that a new RN is accessed into a cell of the RN, if the RN which serves as the network equipment allows the new RN to be accessed into the cell of the network equipment, the RN subframe configuration which is used by the new RN on a return link is determined, the RN subframe configuration is used for the new RN to receive information or send information on the return link, and the return link is the return link between the new RN and the RN which becomes the network equipment; the RN which becomes the network equipment sends the RN subframe configuration to a new RN, and the new RN can receive information or send information on a return link according to the received RN subframe configuration; and then, the new RN starts the established cell of the RN and starts the function of hanging down the RN in the cell to become the network equipment corresponding to the cell established by the new RN, so that the network equipment can be accessed to the RN of the cell corresponding to the network equipment by hanging down the RN, and if the RN has the function of hanging down the RN, the RN can also be hung down, namely: the RN and the new RN allow the next-level RN to access a cell established by the RN; the method realizes the function of multi-stage relay networking.

Fig. 4 is a signaling diagram of another multi-stage relay networking method according to an embodiment of the present application. As shown in fig. 4, the method provided by the present application is applied to a network device and an RN of any cell established by an access network device, where the network device is a DeNB or a DeRN, and the method includes:

step S21, for any cell established by the network device itself, the network device broadcasts the level number of the cell, the uplink service information, the downlink service information, and the RN subframe configuration already adopted in the Un interface, where the uplink service information is the unused uplink service rate or uplink service rate level, the downlink service information is the unused downlink service rate or downlink service level, and the level number represents the level number of the cell established by the network device itself in the multi-level relay networking architecture.

In this embodiment, for example, after starting the self-established cell, the network device needs to broadcast the level number of the self-established cell, further needs to broadcast an unused uplink service rate or uplink service rate class, and further needs to broadcast an unused downlink service rate or downlink service rate class. And, when the RN subframe configuration that the network device has adopted in the Un interface is not set to "null", the network device needs to broadcast the RN subframe configuration that has been adopted in the Un interface. When the network device does not have any RN under-hung in the cell, the RN subframe configuration that the network device has adopted at the Un interface is set to "null".

Specifically, in a cell established by the network device, the network device determines a resource available for the RN to be hung down in the cell, and then determines an uplink traffic rate and a downlink traffic rate that can be provided by the resource at the Un interface. The network equipment divides the unused uplink service rate of the Un interface into a plurality of grades, and divides the unused downlink service rate into a plurality of grades; then the network equipment determines the unused uplink service rate grade at the Un interface according to the unused uplink service rate at the Un interface, and determines the unused downlink service rate grade at the Un interface according to the unused downlink service rate at the Un interface; then, the network device broadcasts the grade number of the cell established by itself, the uplink service information, the downlink service information, and the RN subframe configuration already adopted at the Un interface, wherein the RN subframe configuration is not null, the uplink service information is the unused uplink service rate or the unused uplink service rate grade, and the downlink service information is the unused downlink service rate or the unused downlink service grade. Specifically, the uplink service rate and the downlink service rate that can be provided by the Un interface respectively determine the uplink service rate class and the downlink service rate class that can be provided by the Un interface. When no RN is accessed in the cell, the unused uplink service rate and the unused downlink service rate broadcast by the network device are the uplink service rate and the downlink service rate provided by the Un interface, respectively; the unused uplink service rate class and the unused downlink service rate class broadcasted by the network device are respectively the class corresponding to the uplink service rate and the class corresponding to the downlink service rate provided by the Un interface.

When the network equipment accepts an RN, the network equipment updates the unused uplink service rate and the unused downlink service rate of the Un interface, or updates the unused uplink service rate grade and the unused downlink service rate grade; and the network equipment updates the RN subframe configuration already adopted by the Un interface.

When a radio bearer of a Un interface between current network equipment and a downlink RN is modified, the network equipment needs to re-determine RN subframe configuration between the current network equipment and the downlink RN, wherein the RN subframe configuration is RN subframe configuration adopted by the network equipment and the downlink RN at the Un interface, and at the moment, the network equipment can update unused uplink service rate and unused downlink service rate of the Un interface, or unused uplink service rate grade and unused downlink service rate grade; and at this time, the network device may also update the RN subframe configuration already adopted by the Un interface.

When the network equipment updates the unused uplink service rate/uplink service rate grade of the Un interface, and when the network equipment updates the unused downlink service rate/downlink service rate grade of the Un interface, or when the network equipment updates the adopted RN subframe configuration of the Un interface, the network equipment broadcasts the grade number through the system message, the updated unused uplink service rate/uplink service rate grade of the Un interface, and the updated unused downlink service rate/downlink service rate grade of the Un interface; and when the updated RN subframe configuration adopted is not empty, the network equipment broadcasts the RN subframe configuration adopted by the Un interface through a system message.

When the last RN hung under the network equipment exits the cell of the network equipment, the network equipment updates the unused uplink and downlink service rates of the Un interface or updates the unused uplink and downlink service rate grades of the Un interface; setting RN subframe configuration adopted by the network equipment at a Un interface to be null by the network equipment; then, the network device broadcasts its own stage number, the updated unused uplink service rate/uplink service rate level of the Un interface, and the updated unused downlink service rate/downlink service rate level of the Un interface through the system message.

For example, when the network device is a DeNB, the network device broadcasts a hop count of 0 through the system message; when the preceding-stage RN accesses the previous-stage RN, if the previous-stage RN broadcasts a stage hop number k through the system message, the stage number of the current-stage RN broadcasts the current-stage RN through the system message is k + 1.

Step S22, the RN determines a cell type to be accessed, and determines a downlink subframe set corresponding to the cell type according to the cell type, where the downlink subframe set includes at least one downlink subframe, and the downlink subframe corresponds to each RN subframe configuration corresponding to the determined cell type.

In this embodiment, for example, this step may be referred to as step S11 in fig. 3, and is not described again.

Step S23, the RN searches surrounding cells of the same type/corresponding type according to the determined cell type, and in each searched cell, detects the number of levels of cell broadcasts, uplink service information, downlink service information, and RN subframe configuration already adopted in the Un interface, where the uplink service information is an unused uplink service rate or an unused uplink service rate level, and the downlink service information is an unused downlink service rate or an unused downlink service rate level.

In this embodiment, for example, the RN searches for surrounding cells of the same type/corresponding type according to the determined cell type, and detects the number of levels, uplink traffic information, downlink traffic information, and RN subframe configuration that has been adopted in the Un interface of these cells.

Step S24, the RN determines a cell with the function of hanging down the RN from the searched cells, and acquires signal quality information of the cell with the function of hanging down the RN.

In this embodiment, for example, for each searched cell, if the number of levels broadcast by the cell, the uplink service information, and the downlink service information are not detected in the cell, the RN determines that the cell is a cell without a downlink RN function; and if the grade number, the uplink service information and the downlink service information of the cell broadcast are detected in the cell, the RN determines that the cell is a cell with the function of hanging down the RN.

For a cell with the function of hanging down RN, the signal quality information of the cell comprises the following information: the relay node comprises RSRP of a cell or RSRQ of the cell, the grade of the cell, unused uplink service rate/uplink service rate grade and unused industry service rate/downlink service rate grade, wherein the grade represents the grade number of the cell with the function of hanging down RN in a multi-grade (hop) relay networking architecture.

And step S25, the RN determines the cell to be accessed according to the signal quality information of the cell with the function of hanging down the RN.

In this embodiment, for example, when the RN selects a cell that needs to be accessed, the RN may select, as an accessed cell, a cell with the largest RSRP value or a cell with the best RSRQ quality from among the searched cells. However, the cell with the largest RSRP value or the cell with the best RSRQ quality does not necessarily have the function of hanging down the RN, and if the cell does not have the function of hanging down the RN, the RN will inevitably fail to access; after access failure, the RN can only select one cell again from other searched cells, and then initiate access again, but it is not guaranteed that the cell selected again has the function of hanging down the RN, which may further cause delay in starting the own cell by the RN, resulting in delay in coverage extension. Therefore, it needs to ensure that the cell selected by the RN is the cell with the function of hanging down the RN.

Specifically, when a cell does not broadcast a level, an uplink service rate/uplink service rate level and a downlink service rate/downlink service rate level which are unused by a Un interface, the RN may determine that the cell does not have a function of hanging down the RN; when a cell broadcasts the level number, the unused uplink/downlink service rate of the Un interface or the uplink/downlink service rate level, the RN can determine that the cell has the function of hanging down the RN.

Specifically, one method for determining a cell to be accessed in step S25 includes: the RN determines a cell with the RSRP or the RSRQ larger than a preset value in the cells with the function of hanging the RN down as a cell to be selected; the RN acquires an interference power value of a downlink subframe of a cell to be selected; and the RN selects a cell with the minimum interference power of the downlink subframe as a cell to be accessed according to the interference power value of the downlink subframe in each cell to be selected. Here, an interference power threshold TH may be preset, and for any cell to be selected, the number M of downlink subframes in the cell, of which the interference power of the downlink subframe is smaller than the threshold, is determined, and a cell with the largest M value is selected as a cell to be accessed. And if a plurality of cells have the maximum M value at the same time, randomly selecting one cell from the cells as the cell to be accessed.

Specifically, another method for determining a cell to be accessed in step S25 includes: the RN determines the cells of which the uplink service rate/uplink service rate grade and the downlink service rate/downlink service rate grade meet the service requirement of the RN in the cells with the function of hanging down the RN, and selects the cell with the minimum grade number or the cell with the maximum RSRP or the optimal RSRQ as the cell to be accessed.

Step S26, the RN accesses the cell to be accessed, and sends an RN subframe configuration request and a downlink subframe measurement result of a downlink subframe to the network device of the cell in the currently accessed cell, where the RN subframe configuration request represents that the RN request obtains an RN subframe configuration applicable to a backhaul link between the RN and the network device, the downlink subframe is a downlink subframe in a downlink subframe set, the downlink subframe set includes downlink subframes corresponding to different RN subframe configurations, and the RN subframe configuration is each RN subframe configuration corresponding to a cell type of the cell to which the RN is currently accessed.

Wherein, the measurement result of the downlink subframe is the interference power of the downlink subframe; or the measurement result of the downlink subframe is an RN subframe configuration sequence list, wherein the RN subframe configuration sequence list includes subscripts of RN subframe configurations in which interference is sorted from weak to strong.

In this embodiment, for example, before accessing a cell to be accessed, the RN needs to measure a downlink subframe of the cell to be accessed by the RN, so as to obtain a measurement result of the downlink subframe.

Specifically, the RN may measure the interference power of the corresponding downlink subframe in the cell to obtain the interference power value of the downlink subframe. Or, the RN determines the interference condition of each RN subframe configuration according to the interference power of the downlink subframe corresponding to each RN subframe configuration, and then sorts various RN subframe configurations according to the sequence from weak interference to strong interference to obtain an RN subframe configuration sequence list, wherein the RN subframe configuration sequence list includes the subscript of the RN subframe configuration in which the interference is sorted from weak interference to strong interference.

Then, the RN sends the RN subframe configuration request and the measurement result of the downlink subframe to the network device, or the RN sends the RN subframe configuration request and the RN subframe configuration sequence list to the network device. At this time, the transmission procedure of the RN may refer to step S11 shown in fig. 3.

Optionally, when the network device is configured with the RN subframe already adopted by the Un interface in the cell broadcast cell, when the RN accesses the cell, the RN only reports the RN subframe configuration list already adopted by the surrounding cell, and at this time, the measurement result of the downlink subframe reported by the RN may be the RN subframe configuration list of the surrounding cell; then, when the network device determines the RN subframe configuration of the backhaul link suitable for the RN, the network device preferentially selects an appropriate RN subframe configuration from the RN subframe configurations that are not adopted by the surrounding cells.

Step S27, the network device determines that the access object is RN according to the RN subframe configuration request.

In this embodiment, for example, after receiving the RN subframe configuration request sent by the RN, the network device may determine that the access object is the RN.

Step S28, the network device measures the uplink subframe corresponding to the cell type of the cell of the network device, to obtain an uplink subframe measurement result.

In the present embodiment, for example, the present step may refer to step S13 of fig. 3.

Step S29, determining, according to the downlink subframe measurement result and the uplink subframe measurement result, an RN subframe configuration applicable to a backhaul link between the network device and the RN.

The first implementation manner of step S28 is:

step S291a, if the measurement result of the downlink subframe is the interference power of the downlink subframe, the network device determines the downlink subframe applicable to the backhaul link between the network device and the RN according to the interference power of the downlink subframe. If the network device is not the DeNB, the network device determines downlink subframes used in a backhaul link between the network device and a superior network device of the network device, and removes the subframes from the downlink subframes suitable for the backhaul link between the network device and the RN to obtain the final downlink subframes suitable for the backhaul link between the network device and the RN.

Step S292a, the network device determines, according to the uplink subframe measurement result, an uplink subframe applicable to the backhaul link between the network device and the RN.

Step S293a, the network device determines, according to the downlink subframe applicable to the backhaul link between the network device and the RN and the uplink subframe applicable to the backhaul link between the network device and the RN, an RN subframe configuration applicable to the backhaul link between the network device and the RN.

The second embodiment of step S29 is:

step S291b, if the measurement result of the downlink subframe is the RN subframe configuration sequence list, and if the network device is the donor RN, the network device removes the RN subframe configuration that is not applicable to the backhaul link between the network device and the RN in the RN subframe configuration sequence list, to obtain an updated RN subframe configuration sequence list.

Specifically, if the network device is not the DeNB, that is, if the network device is the donor RN, the network device determines RN subframe configurations used in the backhaul links of the network device and the upper-level network device, and removes the RN subframe configurations from the RN subframe configuration order list to obtain an updated RN subframe configuration order list.

Step S292b, the network device determines, according to the measurement result of the uplink subframe, an uplink subframe applicable to the backhaul link between the network device and the RN.

Step S293b, the network device determines, according to the uplink subframe applicable to the backhaul link between the network device and the RN and the updated RN subframe configuration order list, an RN subframe configuration applicable to the backhaul link between the network device and the RN. The determined RN subframe configuration is determined to be RN subframe configuration in the updated RN subframe configuration sequence list.

The third embodiment of step S29 is:

step S291c, when the network device obtains the RN subframe configuration list adopted by the surrounding cell, the network device determines, according to the uplink subframe measurement result, an uplink subframe applicable to the backhaul link between the network device and the RN.

Step S292c, the network device determines, according to the uplink subframe applicable to the backhaul link between the network device and the RN subframe configuration list adopted by the surrounding cells, an RN subframe configuration applicable to the backhaul link between the network device and the RN. Preferably, the network device preferentially selects an RN subframe configuration that is not adopted by the surrounding cells.

The steps S292a, S292b and S291c are all implemented as follows:

the network equipment determines an uplink subframe set according to the cell type of the cell, wherein the uplink subframe set comprises uplink subframes corresponding to different RN subframe configurations;

the network equipment measures the interference power of an uplink subframe in an uplink subframe set;

the network equipment determines an uplink subframe suitable for a backhaul link between the network equipment and the RN according to the interference power of the uplink subframe in the uplink subframe set;

if the network device is not the DeNB, that is, the network device is the donor RN, the network device removes the uplink subframe used in the backhaul link between the network device and the previous-stage network device from the uplink subframe applicable to the backhaul link between the network device and the RN, so as to obtain a final uplink subframe applicable to the backhaul link between the network device and the RN.

The method for determining the configuration of the uplink subframe, the downlink subframe and the RN subframe suitable for the return link in the process is applied to an in-band multi-stage relay networking scene. The in-band multi-stage relay networking scene means that the frequency point adopted by each stage of network equipment and the upper stage of network equipment through the Un interface communication is the same as the frequency point adopted by the current stage of network equipment between the Un interface and the lower stage of network equipment through the Un interface communication.

The method for determining the configuration of the uplink subframe, the downlink subframe and the RN subframe which are suitable for the backhaul link in the process is not completely suitable for the out-of-band multi-stage relay networking scene. The out-of-band multi-stage relay networking scene means that the frequency point adopted by the Un interface communication between each stage of network equipment and the previous stage of network equipment is different from the frequency point adopted by the Un interface communication between the current stage of network equipment and the next stage of network equipment.

A very special scenario exists in a multi-level out-of-band relay networking scenario: the cell accessed by the RN is the cell of the DeRN, and the DeRN and the upper-level network equipment support the information transmission or reception of the information through the Un interface in the same subframe with the downlink RN while receiving or transmitting the information through the Un interface in a certain subframe.

Besides the above-mentioned multi-level in-band relay networking scenario and multi-level out-of-band relay networking scenario, there is also a multi-level relay networking scenario: a multi-level hybrid relay networking scenario. The multi-stage hybrid relay networking scene means that frequency points adopted for communication between some network equipment and previous-stage network equipment through a Un interface are the same as frequency points adopted for communication between the Un interface and next-stage network equipment of the current-stage network equipment, and the frequency points adopted for communication between some network equipment and next-stage network equipment through the Un interface are different from the frequency points adopted for communication between the Un interface and the next-stage network equipment of the current-stage network equipment.

A very special scenario also exists in the hybrid multi-stage relay networking scenario: the cell accessed by the RN is a cell of the DeRN, the frequency point adopted by the communication between the DeRN and the upper-level network equipment is different from the frequency point adopted by the cell of the DeRN, and the DeRN and the upper-level network equipment receive or send information through a Un interface in a certain subframe and simultaneously support the sending or receiving of the information through the Un interface by the RN hung down in the same subframe.

In the special scenario of the multi-level out-of-band relay networking and the special scenario of the multi-level hybrid relay networking, the method for determining, by the network device in step S29, the RN subframe configuration applicable to the backhaul link between the network device and the RN according to the measurement result of the downlink subframe, the measurement result of the uplink subframe, and the cell type of the cell is as follows. In other multi-level out-of-band relay networking scenarios and other multi-level hybrid relay networking scenarios, the method of step S29 is fully applicable.

The first implementation method of step S29 in a special scenario:

and if the measurement result of the downlink subframe is the interference power of the downlink subframe, the network equipment determines the downlink subframe suitable for the return link between the network equipment and the RN according to the interference power of the downlink subframe.

And the network equipment determines the uplink subframe suitable for the backhaul link between the network equipment and the RN according to the measurement result of the uplink subframe.

The network device determines an RN subframe configuration applicable to a backhaul link between the network device and the RN according to a downlink subframe applicable to the backhaul link between the network device and the RN and an uplink subframe applicable to the backhaul link between the network device and the RN.

The second implementation method of step S29 in a special scenario:

and if the measurement result of the downlink subframe is the RN subframe configuration sequence list, the network equipment determines the uplink subframe suitable for a return link between the network equipment and the RN according to the measurement result of the uplink subframe.

Then, an RN subframe configuration applicable to a backhaul link between the network device and the RN is determined according to an uplink subframe and RN subframe configuration order list applicable to the backhaul link between the network device and the RN.

In a special scenario, the third implementation method of step S29:

and if the measurement result of the downlink subframe is RN subframe configuration adopted by the surrounding cells, the network equipment determines the uplink subframe suitable for a return link between the network equipment and the RN according to the measurement result of the uplink subframe.

Then, the network device determines an RN subframe configuration applicable to the backhaul link between the network device and the RN according to the uplink subframe applicable to the backhaul link between the network device and the RN subframe configuration list adopted by the surrounding cells. Preferably, the network device preferentially selects an RN subframe configuration that is not adopted by the surrounding cells.

In the process of determining the RN subframe configuration, the network device (DeRN) does not need to exclude the uplink subframe or the downlink subframe, which is adopted when the network device itself and the previous-stage network device communicate through the pilot frequency point, from the uplink subframe and the downlink subframe, which are suitable for the backhaul link between the network device and the RN.

Step S210, the network device sends the RN subframe configuration applicable to the backhaul link to the RN through dedicated signaling.

In this embodiment, for example, the network device selects at least one RN subframe configuration as the RN subframe configuration of the RN from the obtained RN subframe configurations applicable to the backhaul link between the network device and the RN, for example, the network device may select one or more RN subframe configurations as the RN from the RN subframe configurations applicable to the backhaul link between the network device and the RN based on a Service request of the RN or a Quality of Service (QOS) of each bearer of the Un interface; the network equipment determines parameters required by communication of other Un interfaces; then the network equipment sends the RN subframe configuration of the accessed RN and parameters required by other Un interface communication to the RN through a special signaling; the dedicated signaling may be an RN reconfiguration message or an RRC connection reconfiguration message.

Step S211, the RN receives the dedicated signaling sent by the network device, and determines an uplink subframe and a downlink subframe used on a backhaul link between the network device and the RN according to an RN subframe configuration carried in the dedicated signaling.

In this embodiment, for example, after determining a downlink subframe and a uplink subframe used on a backhaul link between a network device and an RN, the RN monitors an R-PDCCH in the corresponding downlink subframe to capture uplink or downlink scheduling information sent to the RN by the network device, sends a PUSCH in the corresponding uplink subframe according to the uplink scheduling information, and receives a PDSCH in the corresponding downlink subframe according to the downlink scheduling information.

Step S212, the RN sends a response message to the network equipment, wherein the response message represents that the RN completes the relevant configuration according to the special signaling. Preferably, the response message is an RN reconfiguration complete message or an RRC connection reconfiguration complete message.

In the present embodiment, for example, the present step may refer to step S16 of fig. 3.

Step S213, the RN starts the own cell and starts the function of hanging down the RN in the started cell to allow the next-stage RN to access the cell built by the RN.

In this embodiment, for example, the RN starts a cell established by itself, and after the RN starts a function of suspending the RN in the cell established by itself, the RN determines uplink subframes corresponding to each RN subframe configuration corresponding to a cell type of the cell itself, and performs measurement on the uplink subframes to obtain a measurement result of the uplink subframes. Preferably, the measurement result of the uplink subframe is the interference power of the uplink subframes. When a next-stage RN is accessed to a cell of the RN, the RN determines the RN subframe configuration adopted by the RN and the next-stage RN in the communication of a return link according to the measurement result of an uplink subframe, the measurement result of the downlink subframe reported by the next-stage RN and the cell type of the cell.

Step S214, the network device sends a measurement indication and measurement report configuration information to the RN, where the measurement indication is used to indicate the RN to measure the interference power of the downlink subframe, and the measurement report configuration information is used for the RN to determine a measurement report trigger condition.

The measurement reporting trigger condition may be: and when the interference power of one or more downlink subframes in the downlink subframes corresponding to the RN subframe configuration configured to the RN is larger than a preset threshold value, the RN triggers measurement and report.

In this embodiment, for example, the network device may send the measurement indication and the measurement reporting configuration information to the RN through a dedicated signaling, where the dedicated signaling is an RN reconfiguration message. This step may also be performed in step S29, for example, the network device sends the RN subframe configuration, parameters required by the Un interface communication, measurement indication, and measurement report configuration information of the backhaul link applicable to the RN through dedicated signaling.

Step S215, the RN receives the measurement indication and the measurement report configuration information sent by the network device, performs interference power measurement on the downlink subframe according to the measurement indication, and sends a corresponding measurement result of the downlink subframe to the network device through the measurement report message when the measurement result satisfies the measurement report trigger condition.

In this embodiment, for example, the RN may measure the interference power of the downlink subframe in the downlink subframe set according to the measurement indication, to obtain an interference power measurement result of the downlink subframe; determining a measurement reporting trigger condition according to the measurement reporting configuration information; when the measured interference power of the downlink subframe meets the measurement report triggering condition, the RN sends the interference power measurement result or the RN subframe configuration sequence list to the network equipment of the previous stage through the measurement report message, so that the network equipment of the previous stage can update the RN subframe configuration of the backhaul link suitable for the RN.

For example, the measurement report triggering condition is that when the interference power of one or more downlink subframes in the downlink subframes corresponding to the RN subframe configuration configured to the RN is greater than a preset threshold, the RN may trigger measurement report.

Step S216, when the network device meets the trigger condition, the RN subframe configuration on the backhaul link is updated.

In this embodiment, for example, when the network device receives a measurement report message sent by the RN, the network device updates the RN subframe configuration on the backhaul link according to the measurement result of the downlink subframe carried in the message.

The network equipment measures the interference power of the uplink subframe by itself; and updating the RN subframe configuration of the RN when the interference power of the uplink subframe of the RN is determined to meet the preset condition. After the network device configures the RN subframe configuration for the RN, the network device can continue to measure the interference power of each uplink subframe to obtain a measurement result of the uplink subframe; when the network equipment determines that the interference power measurement result of the uplink subframe meets the preset condition, the network equipment updates the RN subframe configuration suitable for the backhaul link between the network equipment and the RN.

The preset condition is set by the network device, for example, when the interference power of a certain uplink subframe in the uplink subframes corresponding to the RN subframe configuration configured to the RN is greater than a preset threshold, the network device updates the RN subframe configuration applicable to the backhaul link between the network device and the RN.

In this embodiment, when the RN of this stage discovers that a new RN accesses to the cell of the RN of this stage, if the RN of this stage allows the new RN to access to the cell of the RN of this stage, the RN of this stage determines the RN subframe configuration of the new RN, and the RN subframe configuration is used for the new RN to receive information or send information on a backhaul link; the RN at the current stage sends the RN subframe configuration to the new RN, and the new RN receives information or sends information on a return link between the RN and the RN at the current stage according to the received RN subframe configuration; then, the new RN establishes a cell of the RN and starts a function of hanging down the RN in the cell of the RN, so that the network equipment can hang down the RN, and the RN also has the function of hanging down the RN, namely the RN can also hang down the next-level RN; the function of multi-stage relay networking is realized. The method provided by the embodiment is suitable for an in-band multi-stage relay networking architecture, an out-of-band multi-stage relay networking architecture and a hybrid multi-stage relay networking architecture.

Fig. 5 is a flowchart of another multi-stage relay networking method according to an embodiment of the present application. As shown in fig. 5, the method provided by the present application is applied to an RN, and the method includes:

s301, the RN sends an RN subframe configuration request and a downlink subframe measurement result of a downlink subframe to the network equipment in a cell established by the network equipment, wherein the RN subframe configuration request represents that the RN request acquires RN subframe configuration suitable for a backhaul link between the network equipment and the RN, the downlink subframe is a downlink subframe in a downlink subframe set, the downlink subframe set comprises downlink subframes corresponding to different RN subframe configurations, and the RN subframe configuration is each RN subframe configuration corresponding to a cell type of the cell of the network equipment.

S302, the RN receives an RN subframe configuration, which is sent by the network device through a dedicated signaling and is applicable to a backhaul link between the network device and the RN, wherein the RN subframe configuration applicable to the backhaul link between the network device and the RN is determined by the network device according to a downlink subframe measurement result and a self-acquired uplink subframe measurement result.

S303, the RN determines an uplink subframe and a downlink subframe used on a backhaul link between the network device and the RN according to an RN subframe configuration applicable to the backhaul link between the network device and the RN. And monitoring the R-PDCCH in the corresponding downlink subframe, and sending the PUSCH in the corresponding uplink subframe or receiving the PDSCH in the corresponding downlink subframe according to the monitored uplink or downlink scheduling information on the R-PDCCH.

S304, sending a response message to the network equipment, wherein the response message represents that the RN completes the relevant configuration according to the special signaling.

S305, the RN establishes a cell of the RN, and starts the function of the RN to hang down in the cell of the RN so as to allow the next-stage RN to access the cell established by the RN.

The method provided in this embodiment may refer to the method provided in fig. 3, and is not described again.

Fig. 6 is a flowchart of another multi-stage relay networking method according to an embodiment of the present application. As shown in fig. 6, the method provided by the present application is applied to an RN, and the method includes:

s401, determining a cell type needing to be accessed, and determining a downlink subframe set of downlink subframes corresponding to the cell type, wherein the downlink subframe set comprises at least one downlink subframe, and the downlink subframes correspond to each RN subframe configuration corresponding to the cell type.

S402, searching each cell corresponding to the cell type, selecting a cell with a downlink RN function from all the searched cells, and acquiring signal quality information of each selected cell, wherein the signal quality information is RSRP of the cell, RSRQ of the cell, the number of stages, uplink service information, downlink service information and RN subframe configuration broadcasted by surrounding cells.

Specifically, the RN searches each cell corresponding to the cell type, and for any searched cell, the RN receives the number of levels broadcast by the cell in the cell, the uplink service information, the downlink service information, and the RN subframe configuration already adopted in the Un interface, where the uplink service information is an unused uplink service rate or an unused uplink service rate level, and the downlink service information is an unused downlink service rate or an unused downlink service rate level. When the RN subframe configuration adopted by the cell in the Un interface is not null, the cell also broadcasts the RN subframe configuration adopted by the Un interface.

And if the cell can receive the level, the uplink service information and the downlink service information broadcasted by the system message, determining that the cell is the cell with the function of hanging down the RN.

For the cell with the function of hanging down the RN, the RN further acquires the signal quality information of the cell. The signal quality information of the cell includes: RSRP or RSRQ, number of levels of cells, unused uplink traffic rate/unused uplink traffic rate level, unused downlink traffic rate/unused downlink traffic rate level. The grade of the cell represents the grade of the cell with the down-hanging RN function in a multi-stage relay networking scene.

S403, determining the cell to be accessed according to the signal quality information of each selected cell.

Wherein step S403 specifically includes: determining the RSRP or RSRQ of the cell larger than a preset value in the selected cells as a cell to be selected; acquiring an interference power value of a downlink subframe of a cell to be selected; and determining the cell with the minimum interference power value of the downlink subframe of the cell to be selected as the cell to be accessed.

Alternatively, step S403 specifically includes: selecting a cell of which the uplink service information and the downlink service information meet the service request of the RN from the selected cells as a cell to be selected, wherein the uplink service information is an unused uplink service rate or an unused uplink service rate grade, and the downlink service information is an unused downlink service rate or an unused downlink service rate grade; and selecting the cell with the minimum grade, or selecting the cell with the optimal RSRP, or selecting the cell with the optimal RSRQ as the cell to be accessed.

S404, an RN subframe configuration request and a downlink subframe measurement result of a downlink subframe are sent to network equipment for establishing the cell in the cell to be accessed, wherein the RN subframe configuration request represents that the RN request acquires RN subframe configuration suitable for a return link of the RN, the downlink subframe is a downlink subframe in a downlink subframe set, the downlink subframe set comprises downlink subframes corresponding to different RN subframe configurations, and the RN subframe configuration is each RN subframe configuration corresponding to the cell type of the cell to be accessed.

S405, receiving an RN subframe configuration applicable to the backhaul link and sent by the network device through dedicated signaling, and sending a response message to the network device to indicate that the relevant configuration is completed. The RN subframe configuration suitable for the return link is determined by the network equipment according to the measurement result of the downlink subframe, the measurement result of the uplink subframe obtained by the network equipment and the cell type; the dedicated signaling is an RN reconfiguration message or an RRC connection reconfiguration message, and the response message is an RN reconfiguration completion message or an RRC connection reconfiguration completion message.

And S406, determining an uplink subframe and a downlink subframe used on the backhaul link according to the RN subframe configuration applicable to the backhaul link. And monitoring the R-PDCCH in the corresponding downlink subframe, and sending the PUSCH in the corresponding uplink subframe or receiving the PDSCH in the corresponding downlink subframe according to the monitored uplink or downlink scheduling information on the R-PDCCH.

S407, establishing the own cell, and starting the function of hanging the RN in the own cell.

Specifically, according to the cell type of the cell of the ue, the interference power of the uplink subframe is measured, so as to determine the RN subframe configuration used on the backhaul link between the next-stage network device and the RN when the next-stage network device accesses the cell established by the RN, where the next-stage network device is the next-stage RN.

S408, receiving a measurement instruction and measurement reporting configuration information sent by the network equipment, wherein the measurement instruction is used for indicating the RN to measure the interference power of the downlink subframe, and the measurement reporting configuration information is used for determining a measurement reporting trigger condition; the measurement reporting triggering condition is that the RN triggers measurement reporting when the interference power of a certain downlink subframe in the downlink subframes corresponding to the RN subframe configuration configured to the RN is larger than a preset threshold value.

And S409, according to the measurement indication, the RN measures the interference power of the downlink subframe.

S410, determining a measurement report triggering condition according to the measurement report configuration information. And when the trigger condition of measurement report is satisfied, sending a measurement report message to the network equipment, wherein the message carries the measurement result of the downlink subframe, and the measurement result of the downlink subframe is as follows: and the interference power of the downlink subframe or an RN subframe configuration sequence list. If the RN can capture the RN subframe configuration adopted by the surrounding cell, the measurement result of the downlink subframe carried in the measurement report message is: and RN subframe configuration lists adopted by surrounding cells.

The method provided in this embodiment may refer to the method provided in fig. 4, and is not described again.

Fig. 7 is a schematic structural diagram of a multi-stage relay networking device on a network device side according to an embodiment of the present application, and as shown in fig. 7, the device according to the embodiment includes:

a receiving module 51, configured to receive, in a cell established by itself, an RN subframe configuration request sent by an RN and a downlink subframe measurement result of a downlink subframe, where the RN subframe configuration request represents that the RN request obtains an RN subframe configuration applicable to a backhaul link between a network device and the RN, the downlink subframe is a downlink subframe in a downlink subframe set, the downlink subframe set includes downlink subframes corresponding to different RN subframe configurations, and the RN subframe configuration is each RN subframe configuration corresponding to a cell type of the cell;

a first determining module 52, configured to determine, according to the RN subframe configuration request, that the access object is an RN;

a measurement module 53, configured to measure an uplink subframe corresponding to a cell type of a cell of the network device, to obtain an uplink subframe measurement result;

a second determining module 54, configured to determine, according to the downlink subframe measurement result and the uplink subframe measurement result, an RN subframe configuration applicable to a backhaul link between the network device and the RN;

a first sending module 55, configured to send, through a dedicated signaling, an RN subframe configuration applicable to a backhaul link to an RN, so that the RN receives the dedicated signaling, determine, according to the RN subframe configuration carried in the dedicated signaling, an uplink subframe and a downlink subframe used on the backhaul link, receive a response message fed back by the RN, characterize the RN to complete a relevant configuration according to the dedicated signaling, and start, in a cell established by itself, a function of suspending the RN so as to allow a next-stage RN to access the cell established by itself.

The multi-stage relay networking device of this embodiment may execute the multi-stage relay networking method provided in this embodiment, and the implementation principle and technical effect thereof are similar, and are not described herein again.

Fig. 8 is a schematic structural diagram of another multi-stage relay networking device on a network device side according to an embodiment of the present application, and as shown in fig. 8, based on the embodiment shown in fig. 7, a measurement result of a downlink subframe is an interference power of the downlink subframe; a second determination module 54 comprising:

a first determining submodule 541, configured to determine, according to the interference power of the downlink subframe, a downlink subframe applicable to a backhaul link between the network device and the RN;

a second determining submodule 542, configured to determine, according to the uplink subframe measurement result, an uplink subframe applicable to a backhaul link between the network device and the RN;

a third determining sub-module 543, configured to determine, according to a downlink subframe applicable to a backhaul link between the network device and the RN and an uplink subframe applicable to the backhaul link between the network device and the RN, an RN subframe configuration applicable to the backhaul link between the network device and the RN.

The second determining module 54 further includes:

the first removing submodule 544 is configured to, after the first determining submodule 541 determines, according to the interference power of the downlink subframe, the downlink subframe applicable to the backhaul link between the network device and the RN, remove, if the network device is the donor RN, the downlink subframe used in the backhaul link by the network device and the network device at the previous stage from the downlink subframe applicable to the backhaul link between the network device and the RN, and obtain a final downlink subframe applicable to the backhaul link.

Or the measurement result of the downlink subframe is an RN subframe configuration sequence list, wherein the RN subframe configuration sequence list comprises subscripts of RN subframe configurations with interference sorted from weak to strong; a second determination module 54 comprising:

a second removing sub-module 545, configured to remove RN subframe configurations that are not applicable to the backhaul link of the RN in the RN subframe configuration order list, to obtain an updated RN subframe configuration order list;

a fourth determining submodule 546, configured to determine, according to the uplink subframe measurement result, an uplink subframe applicable to a backhaul link between the network device and the RN;

a fifth determining submodule 547, configured to determine, according to the uplink subframe applicable to the backhaul link between the network device and the RN and the updated RN subframe configuration order list, an RN subframe configuration applicable to the backhaul link between the network device and the RN.

The second removing submodule 545 is specifically configured to: and if the network equipment is the donor RN, removing the RN subframe configuration used in a return link between the network equipment and the upper-level network equipment of the network equipment to obtain an updated RN subframe configuration sequence list.

The measurement module 53 is specifically configured to:

determining an uplink subframe set according to the cell type of the cell, wherein the uplink subframe set comprises uplink subframes corresponding to different RN subframe configurations;

measuring the interference power of an uplink subframe in an uplink subframe set;

determining an uplink subframe suitable for a backhaul link between the network equipment and the RN according to the interference power of the uplink subframe in the uplink subframe set;

if the network device is the donor RN, removing the uplink subframe used in the backhaul link between the network device and the network device at the upper stage from the uplink subframe applicable to the backhaul link between the network device and the RN, and obtaining a final uplink subframe applicable to the backhaul link between the network device and the RN.

The apparatus of this embodiment further comprises:

a second sending module 61, configured to send, after the first sending module 55 sends the RN subframe configuration applicable to the backhaul link to the RN through a dedicated signaling, a measurement indication and measurement report configuration information to the RN, where the measurement indication is used to indicate the RN to measure the interference power of the downlink subframe, and the measurement report configuration information is used for the RN to determine a measurement report trigger condition.

The measurement reporting triggering condition is that the RN triggers measurement reporting when the interference power of at least one downlink subframe in the downlink subframes corresponding to the RN subframe configuration configured to the RN is larger than a preset threshold value.

The apparatus of this embodiment, further comprising:

an updating module 62, configured to measure an interference power of an uplink subframe in the uplink subframe set after the first sending module 55 sends the RN subframe configuration applicable to the backhaul link to the RN through dedicated signaling, and update the RN subframe configuration applicable to the backhaul link between the network device and the RN when it is determined that the interference power of at least one uplink subframe in the uplink subframe set meets a preset condition.

The apparatus of this embodiment, further comprising:

a broadcasting module 63, configured to broadcast, before the receiving module 51 receives, in a cell established by itself, an RN subframe configuration request and a downlink subframe measurement result of a downlink subframe, which are sent by an RN, the rank number of the cell established by a network device itself, uplink service information, downlink service information, and RN subframe configuration already adopted in a Un interface, where the rank number represents the rank number of the cell established by the network device itself in a multi-level relay networking architecture, the uplink service information is an unused uplink service rate or an unused uplink service rate level, and the downlink service information is an unused downlink service rate or an unused downlink service level.

The multi-stage relay networking device of this embodiment may execute another multi-stage relay networking method provided in this embodiment, and the implementation principle and technical effect thereof are similar, and are not described herein again.

Fig. 9 is a schematic structural diagram of a multi-stage relay networking device on an RN side according to an embodiment of the present application, and as shown in fig. 9, the device according to the embodiment includes:

a first sending module 71, configured to send an RN subframe configuration request and a downlink subframe measurement result of a downlink subframe to a network device, where the RN subframe configuration request represents that the RN request obtains an RN subframe configuration applicable to a backhaul link between the network device and an RN, the downlink subframe is a downlink subframe in a downlink subframe set, the downlink subframe set includes downlink subframes corresponding to different RN subframe configurations, and the RN subframe configuration is each RN subframe configuration corresponding to a cell type of a cell of the network device;

a first receiving module 72, configured to receive an RN subframe configuration, sent by a network device through dedicated signaling, that is applicable to a backhaul link between the network device and an RN, where the RN subframe configuration applicable to the backhaul link between the network device and the RN is determined by the network device according to a downlink subframe measurement result and a self-acquired uplink subframe measurement result;

a first determining module 73, configured to determine, according to an RN subframe configuration applicable to a backhaul link between a network device and an RN, an uplink subframe and a downlink subframe used on the backhaul link between the network device and the RN;

a second sending module 74, configured to send a response message to the network device, where the response message indicates that the RN completes the relevant configuration according to the dedicated signaling;

a starting module 75, configured to establish a cell of itself, and start a function of hanging the RN down in the cell established by itself to allow the next-stage RN to access the cell established by itself.

Fig. 10 is a schematic structural diagram of another multi-stage relay networking device on an RN side according to an embodiment of the present application, and as shown in fig. 10, on the basis of the embodiment shown in fig. 9, the device of the present embodiment further includes:

a second determining module 81, configured to determine a cell type to be accessed before the first sending module 71 sends the RN subframe configuration request and a downlink subframe measurement result of the downlink subframe to the network device, and determine, according to the cell type, a downlink subframe set of the downlink subframe corresponding to the cell type, where the downlink subframe set includes at least one downlink subframe, and the downlink subframe corresponds to each RN subframe configuration corresponding to the cell type;

a searching module 82, configured to search each cell corresponding to a cell type of a cell to be accessed, select a cell with a downward RN function from all searched cells, and acquire signal quality information of each selected cell, where the signal quality information is RSRP, RSRQ, a rank, uplink service information, downlink service information, and RN subframe configuration broadcasted by surrounding cells;

specifically, the search module 82 is specifically configured to: detecting the level number, uplink service information, downlink service information and RN subframe configuration already adopted in a Un interface of each searched cell, wherein the uplink service information is unused uplink service rate or unused uplink service rate grade, and the downlink service information is unused downlink service rate or unused downlink service rate grade; if the level number, the uplink service information and the downlink service information of cell broadcasting are not detected in the cell, determining that the cell is a cell without the function of hanging down the RN; and if the level number, the uplink service information and the downlink service information of the cell broadcast are detected in the cell, determining that the cell is a cell with a downlink RN function.

A third determining module 83, configured to determine a cell to be accessed according to the signal quality information of each selected cell.

The third determining module 83 is specifically configured to:

determining the RSRP or RSRQ of the cell larger than a preset value in the selected cells as a cell to be selected;

acquiring an interference power value of a downlink subframe of a cell to be selected;

and determining the cell with the minimum interference power value of the downlink subframe of the cell to be selected as the cell to be accessed.

Or, the third determining module 83 is specifically configured to:

selecting a cell of which the uplink service information and the downlink service information meet the service request of the RN from the selected cells as a cell to be selected;

and determining the cell with the minimum rank number, or the cell with the optimal RSRP or the cell with the optimal RSRQ in the cells to be selected as the cell to be accessed.

The apparatus of this embodiment, further comprising:

a saving module 84, configured to save the RN subframe configuration applicable to the backhaul link before the first determining module 73 determines, according to the RN subframe configuration applicable to the backhaul link between the network device and the RN, an uplink subframe and a downlink subframe used on the backhaul link between the network device and the RN.

The starting module 75 is specifically configured to: and establishing a cell of the RN, and measuring the interference power of an uplink subframe in RN subframe configuration corresponding to the cell type of the cell of the RN according to the cell type of the cell of the RN, so as to determine the RN subframe configuration on a return link between the next-stage network equipment and the RN when the next-stage network equipment is accessed to the RN.

The apparatus of this embodiment, further comprising:

a second receiving module 85, configured to receive a measurement indication and measurement report configuration information sent by a network device after or before the starting module 75 starts the cell established by itself and the cell established by itself starts a function of suspending the RN to allow the next-stage RN to access the cell established by itself, where the measurement indication is used to indicate the RN to measure the interference power of the downlink subframe, and the measurement report configuration information is used for the RN to determine a measurement report trigger condition;

a second measurement module 86, configured to measure an interference power of the downlink subframe according to the measurement indication;

a fourth determining module 87, configured to determine a measurement report triggering condition according to the measurement report configuration information.

Fig. 11 is a schematic structural diagram of a network device according to an embodiment of the present application. As shown in fig. 11, the network device provided in the embodiment of the present application may be configured to execute actions or steps of the network device in the embodiments shown in fig. 3 to 4, and may also be configured to execute actions or steps of each module of the network device in the embodiments shown in fig. 7 to 8, where the actions or steps specifically include: a processor 1101, a memory 1102, a receiver 1103, and a transmitter 1104.

A memory 1102 for storing a computer program.

The processor 1101 is configured to execute the computer program stored in the memory 1102 to implement the processing actions of the network device in the embodiments shown in fig. 3 to 4, or the processing actions of each module of the network device in the embodiments shown in fig. 7 to 8, which are not described again.

The receiver 1103 is configured to perform a receiving action of the network device in the embodiments shown in fig. 3 to 4, or a receiving action of each module of the network device in the embodiments shown in fig. 7 to 8, which is not described again.

The transmitter 1104 is configured to perform a sending action of the network device in the embodiments shown in fig. 3 to 4, or send actions of each module of the network device in the embodiments shown in fig. 7 to 8, which is not described again.

The processor 1101 may be a controller, and is shown as "controller/processor 1101" in fig. 11. The receiver 1103 and the transmitter 1104 are used for supporting information transceiving between the network device and the user equipment in the above embodiments, and supporting radio communication between the network device and other network devices. Optionally, the processor 1101 performs various functions for communicating with the user equipment.

In addition, the network device may also include a communication interface 1105. Communication interface 1105 is used to support network devices in communicating with other network entities.

The processor 1101, such as a Central Processing Unit (CPU), may also be one or more integrated circuits configured to implement the above methods, such as: one or more special integrated circuits, or one or more microprocessors, or one or more field programmable gate arrays, or the like. The memory 1102 may be a single memory or a combination of multiple memory elements.

Fig. 12 is a schematic structural diagram of an RN according to an embodiment of the present application. As shown in fig. 12, the RN provided in the embodiment of the present application may be used to perform the actions or steps of the RN in the embodiments shown in fig. 5 to 6, and may also be used to perform the actions or steps of each module of the RN in the embodiments shown in fig. 9 to 10, which specifically includes: a processor 1201, a memory 1202, a receiver 1203 and a transmitter 1204.

A memory 1202 for storing a computer program.

The processor 1201 is configured to execute the computer program stored in the memory 1202 to implement the processing operation of the RN in the embodiment shown in fig. 5 to 6, or the processing operation of each module of the RN in the embodiment shown in fig. 9 to 10, which is not described again.

The receiver 1203 is configured to perform a receiving operation of the RN in the embodiments shown in fig. 5-6, or a receiving operation of each module of the RN in the embodiments shown in fig. 9-10, which is not described again.

The transmitter 1204 is configured to perform a sending operation of the RN in the embodiments shown in fig. 5 to 6, or a sending operation of each module of the RN in the embodiments shown in fig. 9 to 10, which is not described again.

The processor 1201 may also be a controller, and is referred to as "controller/processor 1201" in fig. 12. The receiver 1203 and the transmitter 1204 are configured to support information transceiving between the RN and the user equipment in the above embodiments, and support radio communication between the RN and other RNs or denbs. Optionally, the processor 1201 performs various functions for communicating with the user equipment.

In addition, the RN may also include a communication interface 1205. The communication interface 1205 is used to support RN communications with other network entities.

The processor 1201, e.g., a CPU, may also be one or more integrated circuits configured to implement the above methods, e.g.: one or more special integrated circuits, or one or more microprocessors, or one or more field programmable gate arrays, or the like. The memory 1202 may be a single memory or a combination of a plurality of memory elements.

An embodiment of the present application provides a communication system, which includes the network device provided in fig. 5 to 6 and the RN provided in fig. 9 to 10.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

1. A multi-stage relay networking method is applied to network equipment and comprises the following steps:

measuring an uplink subframe corresponding to the cell type of the cell of the network equipment to obtain an uplink subframe measurement result; wherein the measurement result is a parameter related to interference;

2. The method of claim 1, wherein the downlink subframe measurement result is an interference power of a downlink subframe;

determining, according to the downlink subframe measurement result and the uplink subframe measurement result, an RN subframe configuration applicable to a backhaul link between the network device and the RN, including:

determining a downlink subframe suitable for a backhaul link between the network equipment and the RN according to the interference power of the downlink subframe;

determining an uplink subframe applicable to a backhaul link between the network device and the RN according to the uplink subframe measurement result;

and determining the RN subframe configuration applicable to the backhaul link between the network equipment and the RN according to the downlink subframe applicable to the backhaul link between the network equipment and the RN and the uplink subframe applicable to the backhaul link between the network equipment and the RN.

3. The method of claim 2, wherein after determining a downlink subframe applicable to a backhaul link between the network device and the RN according to the interference power of the downlink subframe, the method further comprises:

and if the network equipment is the donor RN, removing the downlink subframes used in the backhaul link by the network equipment and the upper-level network equipment of the network equipment from the downlink subframes suitable for the backhaul link between the network equipment and the RN to obtain the final downlink subframes suitable for the backhaul link.

4. The method according to claim 1, wherein the measurement result of the downlink subframe is an RN subframe configuration order list, wherein the RN subframe configuration order list includes subscripts of RN subframe configurations whose interferences are ordered from weak to strong;

removing RN subframe configuration which is not suitable for the return link of the RN from the RN subframe configuration sequence list to obtain an updated RN subframe configuration sequence list;

and determining the RN subframe configuration applicable to the backhaul link between the network equipment and the RN according to the uplink subframe applicable to the backhaul link between the network equipment and the RN and the updated RN subframe configuration sequence list.

5. The method of claim 4, wherein removing the RN subframe configurations which are not applicable to the backhaul link of the RN from the RN subframe configuration order list to obtain an updated RN subframe configuration order list comprises:

and if the network equipment is the donor RN, removing the RN subframe configuration used in a return link between the network equipment and the upper-level network equipment of the network equipment to obtain the updated RN subframe configuration sequence list.

6. The method according to any of claims 3-5, wherein determining the uplink subframe applicable to the backhaul link between the network device and the RN according to the uplink subframe measurement result comprises:

determining an uplink subframe set according to the cell type of the cell, wherein the uplink subframe set comprises uplink subframes corresponding to the different RN subframe configurations;

measuring the interference power of an uplink subframe in the uplink subframe set;

determining an uplink subframe suitable for a backhaul link between the network device and the RN according to interference power of the uplink subframe in the uplink subframe set;

and if the network equipment is the donor RN, removing the uplink subframe used in the backhaul link between the network equipment and the network equipment at the upper stage from the uplink subframe suitable for the backhaul link between the network equipment and the RN to obtain the final uplink subframe suitable for the backhaul link between the network equipment and the RN.

7. The method of claim 1, wherein after the sending the RN subframe configuration applicable to the backhaul link to the RN through dedicated signaling, further comprising:

and sending a measurement indication and measurement reporting configuration information to the RN, wherein the measurement indication is used for indicating the RN to measure the interference power of the downlink subframe, and the measurement reporting configuration information is used for the RN to determine a measurement reporting trigger condition.

8. The method of claim 7, wherein the measurement report trigger condition is that the RN triggers measurement report when an interference power of at least one of downlink subframes corresponding to the RN subframe configuration configured for the RN is greater than a preset threshold.

9. The method of claim 1, wherein after sending the RN subframe configuration applicable to the backhaul link to the RN through dedicated signaling, the method further comprises:

updating the RN subframe configuration applicable to a backhaul link between the network equipment and the RN when the interference power of at least one uplink subframe in the uplink subframe set is determined to meet a preset condition.

10. The method according to any of claims 7-9, wherein before receiving the RN subframe configuration request and the downlink subframe measurement result of the downlink subframe sent by the RN in the self-established cell, the method further comprises:

the method comprises the steps of broadcasting the grade number of a cell established by network equipment, uplink service information, downlink service information and RN subframe configuration already adopted in a Un interface, wherein the grade number represents the grade number of the cell established by the network equipment in a multi-stage relay networking architecture, the uplink service information is unused uplink service rate or unused uplink service rate grade, and the downlink service information is unused downlink service rate or unused downlink service grade.

11. A multi-stage relay networking method is applied to a Relay Node (RN), and comprises the following steps:

receiving RN subframe configuration which is sent by the network equipment through dedicated signaling and is suitable for a backhaul link between the network equipment and the RN, wherein the RN subframe configuration which is suitable for the backhaul link between the network equipment and the RN is determined by the network equipment according to the downlink subframe measurement result and a self-acquired uplink subframe measurement result; wherein the measurement result is a parameter related to interference;

12. The method of claim 11, wherein before the sending the RN subframe configuration request and the downlink subframe measurement result of the downlink subframe to the network device, further comprising:

determining a cell type to be accessed, and determining a downlink subframe set of downlink subframes corresponding to the cell type according to the cell type, wherein the downlink subframe set comprises at least one downlink subframe, and the downlink subframes correspond to each RN subframe configuration corresponding to the cell type;

searching each cell corresponding to the cell type, selecting a cell with a downlink RN function from all the searched cells, and acquiring signal quality information of each selected cell, wherein the signal quality information is Reference Signal Received Power (RSRP) of the cell, Reference Signal Received Quality (RSRQ) of the cell, the number of stages, uplink service information, downlink service information and RN subframe configuration broadcasted by surrounding cells;

determining the cell to be accessed according to the signal quality information of each selected cell;

wherein, the selecting a cell with a function of hanging down the RN from all the searched cells includes: detecting the number of levels broadcast by each cell in all the cells, uplink service information, downlink service information and RN subframe configuration already adopted in a Un interface, wherein the uplink service information is unused uplink service rate or unused uplink service rate level, and the downlink service information is unused downlink service rate or unused downlink service rate level; for any searched cell, if the level number, the uplink service information and the downlink service information of cell broadcast are not detected in the cell, determining that the cell is a cell without a downlink RN function; and if the level number, the uplink service information and the downlink service information of cell broadcasting are detected in the cell, determining that the cell is a cell with a downlink RN function.

13. The method of claim 12, wherein the determining the cell to be accessed according to the signal quality information of each selected cell comprises:

acquiring an interference power value of a downlink subframe of the cell to be selected;

14. The method of claim 12, wherein the determining the cell to be accessed according to the signal quality information of each selected cell comprises:

selecting a cell, serving as a cell to be selected, in which uplink service information and downlink service information meet a service request of an RN (relay node), wherein the uplink service information is an unused uplink service rate or an unused uplink service rate grade, and the downlink service information is an unused downlink service rate or an unused downlink service rate grade;

15. The method of claim 11, wherein the hanging the function of the RN under the cell setup by itself is initiated, and comprises:

according to the cell type of the cell, measuring the interference power of an uplink subframe in RN subframe configuration corresponding to the cell type of the cell, so as to determine the RN subframe configuration on a backhaul link between a next-stage network device and the RN when the next-stage network device accesses the RN.

16. The method of claim 11, wherein after the suspending the function of the RN under the self-established cell to allow the next-level RN to access the self-established cell of the RN, the method further comprises:

receiving a measurement indication and measurement reporting configuration information sent by the network equipment, wherein the measurement indication is used for indicating the RN to measure the interference power of the downlink subframe, and the measurement reporting configuration information is used for the RN to determine a measurement reporting trigger condition;

measuring the interference power of the downlink subframe according to the measurement indication;

and determining a measurement reporting trigger condition according to the measurement reporting configuration information.

17. The method of claim 16, wherein the measurement report trigger condition is that the RN triggers measurement report when an interference power of at least one of downlink subframes corresponding to an RN subframe configuration configured for the RN is greater than a preset threshold.

18. A multi-stage relay networking device on a network device side is characterized by comprising:

a measurement module, configured to measure an uplink subframe corresponding to a cell type of a cell of the network device to obtain an uplink subframe measurement result; wherein the measurement result is a parameter related to interference;

19. The apparatus of claim 18, wherein the downlink subframe measurement result is an interference power of a downlink subframe;

the second determining module includes:

a first determining submodule, configured to determine, according to the interference power of the downlink subframe, a downlink subframe applicable to a backhaul link between the network device and the RN;

a second determining submodule, configured to determine, according to the uplink subframe measurement result, an uplink subframe applicable to a backhaul link between the network device and the RN;

a third determining sub-module, configured to determine, according to a downlink subframe applicable to a backhaul link between the network device and the RN and an uplink subframe applicable to the backhaul link between the network device and the RN, an RN subframe configuration applicable to the backhaul link between the network device and the RN.

20. The apparatus of claim 19, wherein the second determining module further comprises:

a first removing sub-module, configured to, after the first determining sub-module determines, according to the interference power of the downlink sub-frame, a downlink sub-frame applicable to a backhaul link between the network device and the RN, remove, if the network device is a donor RN, a downlink sub-frame used in the backhaul link by the network device and a previous stage network device of the network device from the downlink sub-frame applicable to the backhaul link between the network device and the RN, and obtain a final downlink sub-frame applicable to the backhaul link.

21. The apparatus of claim 18, wherein the measurement result of the downlink subframe is an RN subframe configuration sequence list, wherein the RN subframe configuration sequence list includes subscripts of RN subframe configurations whose interferences are ordered from weak to strong;

the second determining module includes:

a second removing submodule, configured to remove RN subframe configurations that are not applicable to the network device and a backhaul link of the RN from the RN subframe configuration order list, to obtain an updated RN subframe configuration order list;

a fourth determining submodule, configured to determine, according to the uplink subframe measurement result, an uplink subframe applicable to a backhaul link between the network device and the RN;

a fifth determining sub-module, configured to determine, according to the uplink subframe applicable to the backhaul link between the network device and the RN and the updated RN subframe configuration order list, an RN subframe configuration applicable to the backhaul link between the network device and the RN.

22. The apparatus according to claim 21, wherein the second removal submodule is specifically configured to:

23. The device according to any one of claims 20 to 22, wherein the measurement module is specifically configured to:

24. The apparatus of claim 18, further comprising:

a second sending module, configured to send, after the first sending module sends the RN subframe configuration applicable to the backhaul link to the RN through a dedicated signaling, a measurement indication and measurement reporting configuration information to the RN, where the measurement indication is used to indicate the RN to measure the interference power of the downlink subframe, and the measurement reporting configuration information is used for the RN to determine a measurement reporting trigger condition.

25. The apparatus of claim 24, wherein the measurement report trigger condition is that the RN triggers measurement report when an interference power of at least one of downlink subframes corresponding to an RN subframe configuration configured to the RN is greater than a preset threshold.

26. The apparatus of claim 18, further comprising:

an updating module, configured to measure an interference power of an uplink subframe in the uplink subframe set after or before the first sending module sends the RN subframe configuration applicable to the backhaul link to the RN through dedicated signaling, and update the RN subframe configuration applicable to the backhaul link between the network device and the RN when it is determined that the interference power of at least one uplink subframe in the uplink subframe set meets a preset condition.

27. The apparatus of any one of claims 24-26, further comprising:

the system comprises a broadcast module and a receiving module, wherein the broadcast module is used for broadcasting the level number, the uplink service information, the downlink service information and the RN subframe configuration already adopted in a Un interface of a cell established by network equipment before the receiving module receives the RN subframe configuration request and the downlink subframe measurement result sent by the RN in the cell established by the receiving module, the level number represents the level number of the cell established by the network equipment in a multi-level relay networking framework, the uplink service information is an unused uplink service rate or an unused uplink service rate grade, and the downlink service information is an unused downlink service rate or an unused downlink service grade.

28. A multi-stage relay networking device on a Relay Node (RN) side is characterized by comprising:

a first receiving module, configured to receive an RN subframe configuration, sent by the network device through dedicated signaling, that is applicable to a backhaul link between the network device and the RN, where the RN subframe configuration applicable to the backhaul link between the network device and the RN is determined by the network device according to the downlink subframe measurement result and a self-obtained uplink subframe measurement result; wherein the measurement result is a parameter related to interference;

29. The apparatus of claim 28, further comprising:

a second determining module, configured to determine a cell type to be accessed before the first sending module sends an RN subframe configuration request and a downlink subframe measurement result of a downlink subframe to a network device, and determine, according to the cell type, a downlink subframe set of the downlink subframe corresponding to the cell type, where the downlink subframe set includes at least one downlink subframe and the downlink subframe corresponds to each RN subframe configuration corresponding to the cell type;

a searching module, configured to search each cell corresponding to the cell type, select a cell with a downward-hanging RN function from all the searched cells, and acquire Signal Quality information of each selected cell, where the Signal Quality information is Reference Signal Receiving Power (RSRP) of the cell, Reference Signal Receiving Quality (RSRQ) of the cell, a number of levels, uplink service information, downlink service information, and RN subframe configuration broadcast by surrounding cells;

a third determining module, configured to determine the cell to be accessed according to the signal quality information of each selected cell;

the search module is specifically configured to: detecting the number of levels broadcasted by each cell, uplink service information, downlink service information and RN subframe configuration already adopted in a Un interface in each searched cell, wherein the uplink service information is unused uplink service rate or unused uplink service rate grade, and the downlink service information is unused downlink service rate or unused downlink service rate grade; if any one of the number of levels broadcast by the cell, the uplink service information, the downlink service information and the RN subframe configuration already adopted in the Un interface is not detected in the cell, determining the cell as a cell without the downlink RN function; and if the level number, the uplink service information and the downlink service information of the cell broadcast are detected in the cell, determining that the cell is a cell with a downlink RN function.

30. The apparatus of claim 29, wherein the third determining module is specifically configured to:

31. The apparatus of claim 29, wherein the third determining module is specifically configured to:

32. The device according to any one of claims 28 to 31, wherein the activation module is specifically configured to:

the method comprises the steps of establishing a cell of the RN, measuring the interference power of an uplink subframe in RN subframe configuration corresponding to the cell type of the cell of the RN according to the cell type of the cell of the RN, and determining the RN subframe configuration on a return link between next-stage network equipment and the RN when the next-stage network equipment is accessed to the RN.

33. The apparatus of claim 28, further comprising:

a second receiving module, configured to receive a measurement indication and measurement report configuration information sent by the network device after or before the starting module starts the cell established by itself and the cell established by itself starts a function of suspending the RN to allow a next-stage network device to access the cell established by itself, where the measurement indication is used to indicate the RN to measure the interference power of the downlink subframe, and the measurement report configuration information is used for the RN to determine a measurement report trigger condition;

a second measurement module, configured to measure an interference power of the downlink subframe according to the measurement indication;

and a fourth determining module, configured to determine a measurement report triggering condition according to the measurement report configuration information.

34. The apparatus of claim 33, wherein the measurement report trigger condition is that the RN triggers measurement report when an interference power of at least one of downlink subframes corresponding to an RN subframe configuration configured to the RN is greater than a preset threshold.