CN110611945B

CN110611945B - Networking method, device and storage medium for multi-hop relay

Info

Publication number: CN110611945B
Application number: CN201810614791.5A
Authority: CN
Inventors: 范晨; 袁乃华; 魏立梅; 朱玉梅; 周志宏; 陈贵荣
Original assignee: Chengdu TD Tech Ltd
Current assignee: Chengdu TD Tech Ltd
Priority date: 2018-06-14
Filing date: 2018-06-14
Publication date: 2021-06-01
Anticipated expiration: 2038-06-14
Also published as: CN110611945A

Abstract

The invention provides a networking method, a device and a storage medium of a multi-hop relay, wherein a first Relay Node (RN) in the method intercepts system messages; and if the first RN listens to system messages broadcasted by at least one second RN, determining a superior RN of the first RN from the at least one second RN according to the related information of the second RNs included in each system message. The networking method, the networking device and the storage medium of the multi-hop relay provided by the invention can ensure that each RN determines the superior RN, thereby completing the networking of the multi-hop relay.

Description

Networking method, device and storage medium for multi-hop relay

Technical Field

The present invention relates to communications technologies, and in particular, to a networking method and apparatus for multihop relay, and a storage medium.

Background

In order to improve coverage, improve cell edge throughput, and perform temporary networking, the third Generation Partnership Project (3rd Generation Partnership Project; 3GPP) adopts a relay technology. The Relay Node (RN) is accessed to a Donor Cell (Donor Cell) under the control of a Donor base station (Donor eNB; DeNB) through a Un interface, and User Equipment (UE) is accessed to the RN through a Uu interface.

Fig. 1 is a schematic view of a multi-hop relay scenario, as shown in fig. 1, in the multi-hop relay scenario, a relay node RN undertakes data transmission of a Uu port, an nth hop Un (N) port, and an N-1 th hop Un (N-1) port, where the RN accesses a UE through the Uu port, receives data of a previous hop Un port through the Un (N) port, and transmits data of the Uu port or the previous hop Un port to a next hop DeNB through the Un (N-1).

However, in a multihop relay scenario, how to select an upper RN for each RN is a technical problem to be solved urgently at present.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a networking method, a networking device and a storage medium for multi-hop relay, so as to determine the superior RN of each RN, thereby realizing the networking of the multi-hop relay.

In a first aspect, an embodiment of the present invention provides a method for networking a multihop relay, including:

a first Relay Node (RN) listens for a system message;

and if the first RN listens to system messages broadcasted by at least one second RN, determining a superior RN of the first RN from the at least one second RN according to the related information of the second RNs included in each system message.

In the method as shown above, the method further comprises:

if the first RN does not monitor the system message broadcast by the second RN, judging whether the first RN has an external interface connected with core network equipment;

and if the first RN has the external interface, determining the first RN as a first-level RN.

In the method as shown above, the related information includes a hop distance;

the determining, according to the relevant information of each second RN included in each system message, a superior RN of the first RN from the at least one second RN includes:

and the first RN determines a second RN with the minimum hop distance as the superior RN.

In the method shown above, the related information includes a backhaul bandwidth of the second RN;

and the first RN determines a second RN with the largest backhaul bandwidth as the superior RN.

In the method as shown above, the related information includes a hop length and a backhaul bandwidth of the second RN;

the first RN weights the hop distance and the return bandwidth of each second RN according to a preset weight value to obtain a weighting result; the backhaul bandwidth is obtained by taking the backhaul bandwidth from the first RN to the 0 th-level RN to be small or performing weighted average processing on the backhaul bandwidth of each RN;

and when the hop distances of the second RNs are the same, the first RN determines the second RN with the largest weighting result as the superior RN.

In the method shown above, the system message further includes a backhaul subframe configuration mode of the second RN;

after the determining of the upper node RN of the first RN from the at least one second RN, the method further comprises:

the first RN respectively acquires a return subframe configuration mode of the upper-level RN and a return subframe configuration mode of the upper-level RN;

the first RN selects one backhaul subframe configuration mode as the backhaul subframe configuration mode of the first RN from other backhaul subframe configuration modes except the backhaul subframe configuration mode of the upper RN and the backhaul subframe configuration mode of the upper RN.

In the method as shown above, the method further comprises:

the first RN selects one feedback subframe configuration mode from other feedback subframe configuration modes except the feedback subframe configuration mode of the upper RN, the feedback subframe configuration mode of the upper RN and the feedback subframe configuration modes of all third RNs as the feedback subframe configuration mode of the first RN; the third RN is an RN capable of being scanned except for the upper RN and the upper RN.

In the above method, acquiring the backhaul subframe configuration mode of the upper RN includes:

the first RN sends a request message to the superior RN;

and the first RN receives a response message sent by the upper RN, wherein the response message carries the return subframe configuration mode of the upper RN.

In the method as shown above, the method further comprises:

the first RN receives a subframe configuration request message sent by a subordinate RN; the subframe configuration request message carries a backhaul subframe configuration mode of at least one fourth RN adjacent to the subordinate RN;

the first RN determines the backhaul subframe configuration mode of the subordinate RN according to the backhaul subframe configuration mode of the first RN, the backhaul subframe configuration mode of the superior RN and the backhaul subframe configuration mode of each fourth RN;

and the first RN sends a subframe configuration response message to the subordinate RN, wherein the subframe configuration response message comprises a return subframe configuration mode of the subordinate RN.

In the above method, the determining, by the first RN, the backhaul subframe configuration mode of the subordinate RN according to the backhaul subframe configuration mode of the first RN, the backhaul subframe configuration mode of the superior RN, and the backhaul subframe configuration mode of each of the fourth RNs includes:

the first RN selects one backhaul subframe configuration mode as the backhaul subframe configuration mode of the lower RN from other backhaul subframe configuration modes except for the backhaul subframe configuration mode of the first RN, the backhaul subframe configuration mode of the upper RN, and the backhaul subframe configuration modes of the fourth RNs.

In a second aspect, an embodiment of the present invention provides a networking apparatus for multihop relay, including:

the monitoring module is used for monitoring system messages;

a determining module, configured to determine, when the first RN listens to a system message broadcasted by at least one second RN, a higher-level RN of the first RN from the at least one second RN according to relevant information of each second RN included in each system message.

In the apparatus as described above, the apparatus further comprises:

a judging module, configured to judge whether the first RN has an external interface connected to a core network device when the first RN does not listen to the system message broadcast by the second RN;

the determining module is further configured to determine the first RN as a first-level RN when the first RN has the external interface.

In the apparatus as shown above, the related information includes a hop distance;

the determining module is specifically configured to:

and determining the second RN with the minimum hop distance as the upper-level RN.

In the apparatus as shown above, the related information includes a backhaul bandwidth of the second RN;

the determining module is specifically configured to:

and determining the second RN with the largest backhaul bandwidth as the upper-level RN.

In the apparatus as shown above, the related information includes a hop length and a backhaul bandwidth of the second RN;

the determining module is specifically configured to:

In the apparatus shown above, the system message further includes a backhaul subframe configuration mode of the second RN;

the device further comprises:

an obtaining module, configured to obtain a backhaul subframe configuration mode of the upper RN and a backhaul subframe configuration mode of the upper RN, respectively;

a selecting module, configured to select one backhaul subframe configuration mode from other backhaul subframe configuration modes except the backhaul subframe configuration mode of the upper RN and the backhaul subframe configuration mode of the upper RN as the backhaul subframe configuration mode of the first RN.

In the apparatus as shown above, the selection module is further configured to:

selecting one backhaul subframe configuration mode as the backhaul subframe configuration mode of the first RN from other backhaul subframe configuration modes except the backhaul subframe configuration mode of the upper RN, and the backhaul subframe configuration modes of the third RNs; the third RN is an RN capable of being scanned except for the upper RN and the upper RN.

In the above apparatus, the obtaining module is specifically configured to:

sending a request message to the upper RN;

and receiving a response message sent by the upper-level RN, wherein the response message carries the return subframe configuration mode of the upper-level RN.

In the apparatus as described above, the apparatus further comprises:

a receiving module, configured to receive a subframe configuration request message sent by a subordinate RN; the subframe configuration request message carries a backhaul subframe configuration mode of at least one fourth RN adjacent to the subordinate RN;

the determining module is further configured to determine the backhaul subframe configuration mode of the subordinate RN according to the backhaul subframe configuration mode of the first RN, the backhaul subframe configuration mode of the superior RN, and the backhaul subframe configuration modes of the fourth RNs;

a sending module, configured to send a subframe configuration response message to the subordinate RN, where the subframe configuration response message includes a backhaul subframe configuration mode of the subordinate RN.

In the above apparatus, the determining module is specifically configured to:

selecting one backhaul subframe configuration mode as the backhaul subframe configuration mode of the lower RN from other backhaul subframe configuration modes except the backhaul subframe configuration mode of the first RN, the backhaul subframe configuration mode of the upper RN, and the backhaul subframe configuration modes of the fourth RNs.

In a third aspect, an embodiment of the present invention provides a relay node, including:

a processor;

a memory; and

a computer program;

wherein the computer program is stored in the memory and configured to be executed by the processor, the computer program comprising instructions for performing the method of the first aspect.

In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored, and the computer program causes a relay node to execute the method in the first aspect.

According to the networking method, the networking device and the storage medium of the multi-hop relay, provided by the invention, a first RN can listen to system messages sent by peripheral RNs, and if the first RN listens to the system messages broadcasted by at least one second RN, the superior RN of the first RN is determined from the at least one second RN according to the related information of the second RNs included in the system messages. After the first RN intercepts the system message sent by the peripheral RN, the first RN determines the superior RN of the first RN according to the related information of the peripheral RN in the system message, so that the networking of the multi-hop relay is completed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a multi-hop relay scenario;

fig. 2 is a flowchart illustrating a first embodiment of a method for multi-hop relay networking according to the present invention;

FIG. 3 is a diagram illustrating selection of an upper level RN;

fig. 4 is a flowchart illustrating a second method for multi-hop relay networking according to an embodiment of the present invention;

FIG. 5 is a diagram of a backhaul subframe;

FIG. 6 is another diagram of subframe backhaul;

FIG. 7 is another diagram of subframe backhaul;

FIG. 8a is a diagram illustrating backhaul subframe selection;

FIG. 8b is another diagram illustrating backhaul subframe selection;

FIG. 8c is a further diagram of backhaul subframe selection;

FIGS. 9 a-9 c are schematic diagrams of a startup process of each RN;

fig. 10 is a schematic structural diagram of a first embodiment of a multi-hop relay networking apparatus according to the present invention;

fig. 11 is a schematic structural diagram of a second embodiment of a multi-hop relay networking device according to the present invention;

fig. 12 is a schematic structural diagram of a third embodiment of a multi-hop relay networking device according to the present invention;

fig. 13 is a schematic structural diagram of a fourth embodiment of a multi-hop relay networking device according to the present invention;

fig. 14 is a schematic structural diagram of a relay node according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The networking method of the multi-hop relay provided by the embodiment of the invention can be applied to a scene of the multi-hop relay, and 3GPP adopts a relay technology for improving coverage, improving cell edge throughput and carrying out temporary network deployment. The RN is accessed to a Donor Cell (Donor Cell) controlled by the DeNB through a Un interface, and the UE is accessed to the RN through a Uu interface. In a multi-hop relay scenario, an RN undertakes data transmission of a Uu port, an nth hop Un (N) port, and an nth-1 hop Un (N-1) port, but how to perform networking on each RN, that is, how to select an uplink-downlink relationship of each relay node RN, for example, how to determine an upper node of a current RN and how to determine a lower node of the current RN, is a technical problem to be solved urgently at present.

In view of the above problem, in the embodiments of the present invention, a first RN may listen to a system message sent by a peripheral RN, and if the first RN listens to a system message broadcast by at least one second RN, a superior RN of the first RN may be determined from the at least one second RN according to related information of each second RN included in each system message. After the first RN intercepts the system message sent by the peripheral RN, the first RN determines the superior RN of the first RN according to the related information of the peripheral RN in the system message, so that the networking of the multi-hop relay is completed.

The technical solution of the present invention will be described in detail below with specific examples. 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.

Fig. 2 is a flowchart illustrating a first embodiment of a method for multi-hop relay networking according to an embodiment of the present invention. As shown in fig. 2, a method for networking a multihop relay according to an embodiment of the present invention includes the following steps:

step 201: the first RN listens for system messages.

Step 202: and if the first RN listens to the system message broadcasted by at least one second RN, determining a superior RN of the first RN from the at least one second RN according to the related information of the second RNs included in the system messages.

In this embodiment, after the first RN is powered on and starts operating, the system messages sent by the peripheral RNs are read.

If the first RN reads the system message sent by the peripheral second RN, it indicates that the peripheral second RN has accessed the multi-hop relay network, and at this time, the first RN selects one RN from at least one second RN that has accessed the relay network as its upper-level RN.

In addition, the system message intercepted by the first RN includes the relevant information of the second RN, and one RN is determined from the plurality of second RNs as an upper-level RN according to the relevant information of each second RN.

In one possible implementation, the relevant information includes Hop distance Hop, where Hop distance Hop represents the number of nodes between the second RN and the core network device. For example: and if a certain RN is connected with the core network equipment, the Hop pitch Hop of the RN is 0, if a certain RN is connected with the RN with the Hop pitch Hop of 0, the Hop pitch Hop of the RN is 1, and the like.

In one possible implementation manner, when determining an upper level RN of the first RN according to the related information of each second RN included in the system message, the second RN with the smallest hop distance may be determined as the upper level RN.

Specifically, when each second RN broadcasts a system message, each system message includes a hop distance of each second RN, and when the first RN determines its own higher-level RN, the second RN with the smallest hop distance may be selected as the higher-level RN, that is, the RN with the shortest path is selected as the higher-level RN. For example, if RN1, RN2 and RN3 broadcast system messages respectively, where the hop distance included in the system message broadcast by RN1 is 0, the hop distance included in the system message broadcast by RN2 is 1, and the hop distance included in the system message broadcast by RN3 is 2, the first RN will select RN1 as its upper RN.

In another possible implementation manner, when the relevant information includes backhaul bandwidth of the second RN, and when a superior RN of the first RN is determined from at least one second RN according to the relevant information of each second RN included in each system message, the second RN with the largest backhaul bandwidth may be determined as the superior RN.

Specifically, when each second RN broadcasts a system message, each system message includes a backhaul bandwidth of each second RN, and when the first RN determines its own higher-level RN, the second RN with the largest backhaul bandwidth may be selected as the higher-level RN. For example, if RN1, RN2, and RN3 broadcast system messages respectively, where the backhaul bandwidth included in the system message broadcast by RN1 is 5M, the backhaul bandwidth included in the system message broadcast by RN2 is 10M, and the backhaul bandwidth included in the system message broadcast by RN3 is 15M, the first RN will select RN3 as its upper RN.

In yet another possible implementation manner, when the relevant information includes the hop distance and the backhaul bandwidth of the second RN, that is, the system message broadcast by each second RN includes the hop distance and the backhaul bandwidth of each second RN, in this way, according to the relevant information of each second RN included in each system message, a superior RN of the first RN is determined from at least one second RN, and the hop distance and the backhaul bandwidth of each second RN may also be weighted according to a preset weight value to obtain a weighting result, and when the hop distances of the second RNs are the same, the first RN determines the second RN with the largest weighting result as the superior RN.

Specifically, the backhaul bandwidth is obtained by narrowing the backhaul bandwidth from the first RN to the 0 th-level RN or performing weighted average processing on the backhaul bandwidth of each RN. The first RN may select an optimal second RN as its own upper-level RN according to the hop distance and Backhaul bandwidth (Backhaul Throughput) of each second RN, for example, may weight the hop distance and Backhaul bandwidth of each second RN according to a preset weight value to obtain a weighting result, and determine the second RN with the largest weighting result as the upper-level RN under the condition that the hop distances of the second RNs are the same. In addition, the preset weight value may be a fixed value or a dynamically calculated value.

For example, if the preset weighted value of the hop distance is 0.4, the weighted value of the backhaul bandwidth is 0.6, if the hop distance of RN1 is 1, the backhaul bandwidth is 2, the hop distance of RN2 is 1, the backhaul bandwidth is 3, the hop distance of RN3 is 1, and the backhaul bandwidth is 4, then the first RN performs weighting calculation to obtain that the weighting result of RN1 is 1.6, the weighting result of RN2 is 2.2, and the weighting result of RN3 is 2.8, and then the first RN selects RN3 as its own upper RN.

Note that, if there are at least two second RNs having the same hop distance, the first RN may select a second RN having the largest Backhaul bandwidth (Backhaul Throughput) as its own upper RN. Another example is: fig. 3 is a schematic diagram of selecting an upper RN, as shown in fig. 3, where a first RN is RN4, and at this time, RN4 is in a terminal mode (UE mode), and sequentially searches neighboring cells and accesses the cell to read system messages, and if RN4 reads system messages sent by RN2, RN5, RN8, and DeNB6, respectively, where each system message includes a Hop distance Hop of each RN and a Backhaul bandwidth Throughput, for example, the Hop distance Hop of RN2 is 1, the Backhaul bandwidth Throughput is 15M, the Hop distance Hop of RN5 is 1, the Backhaul bandwidth Throughput is 20M, the Hop distance of RN8 is 1, the Backhaul bandwidth Throughput is 10M, and the Hop distance of DeNB6 is 0, and the Backhaul bandwidth Throughput is 100M. Since Hop distances Hop of RN2, RN5 and RN8 are all 1, RN4 selects RN5 with the largest Backhaul bandwidth Backhaul Throughput as the upper-level RN, and performs access.

Further, after selecting the upper RN, the first RN accesses the selected upper RN to the network management in the normal UE mode, and acquires configuration information such as an IP address, an available frequency point, a Un and Uu candidate resource pool, and the like. In addition, after the first RN accesses the upper RN, it starts broadcasting a system message, where the system message includes a hop distance, a backhaul bandwidth, or a hop distance and a backhaul bandwidth of the first RN, so that other newly started RNs can select the upper RN, so that all RNs can select their own upper RNs to complete networking, where the hop distance of the first RN is the hop distance of the upper RN plus one.

Optionally, if the first RN does not hear the system message broadcast by the second RN, it is determined whether the first RN has an external interface connected to the core network device, and if the first RN has an external interface, the first RN is determined as the first-level RN.

Specifically, when the first RN reads the system message sent by the adjacent second RN, if the first RN does not read the system message sent by the second RN, it indicates that the first RN may be an RN connected to an external device, and to further perform the confirmation, the first RN will determine whether the first RN has an external interface connected to the core network device, and if the first RN has an external interface, it indicates that the first RN is a first-level RN, that is, an RN directly connected to the core network device. And the hop distance from the first-level RN to the external interface is 0.

Because the RN interconnected with the wire, namely the RN with the external interface, can enter the UE mode after being started, and monitors other RN modes with the external interface RN, the interference is avoided.

In addition, when the first RN determines that it is a wired interconnected RN, that is, there is an external interface, the first RN may also enter a base station mode and broadcast a system message, where the system message includes a hop distance, and the hop distance is 0, so that other RNs read the system message broadcasted by the first RN.

In the networking method of multihop relay provided in the embodiment of the present invention, a first RN may listen to a system message sent by a neighboring RN, and if the first RN listens to a system message broadcasted by at least one second RN, a superior RN of the first RN may be determined from the at least one second RN according to related information of the second RNs included in the system messages. After the first RN intercepts the system message sent by the peripheral RN, the first RN determines the superior RN of the first RN according to the related information of the peripheral RN in the system message, so that the networking of the multi-hop relay is completed.

Fig. 4 is a flowchart illustrating a second embodiment of a method for networking a multihop relay according to the present invention, and this embodiment describes in detail how a backhaul subframe configuration mode is selected after a first RN selects an upper RN based on the embodiment shown in fig. 1, so as to use the selected backhaul subframe to communicate with the upper RN or a lower RN. As shown in fig. 4, the method of this embodiment may include:

step 401, the first relay node RN listens to the system message.

Step 402, if the first RN listens to the system message broadcasted by the at least one second RN, determining a superior RN of the first RN from the at least one second RN according to the related information of each second RN included in each system message.

Steps 401 to 402 are similar to steps 201 to 202 and are not described in detail here.

In step 403, the first RN obtains the backhaul subframe configuration mode of the upper RN and the backhaul subframe configuration mode of the upper RN respectively.

In this embodiment, in a Frequency Division Duplex (FDD) system, the DeNB does not schedule the normal user in the subframe used for the RN backhaul, and in order to avoid the normal user from using or measuring the RN backhaul subframe, the RN backhaul subframe is configured as a Multimedia Broadcast Multicast Service (MBMS) subframe. Since 0,4,5,9 subframes cannot be used for MBMS, the RN backhaul does not use these subframes.

In addition, there are 24 subframes available within 40ms for FDD RN backhaul subframes due to the third Generation Partnership Project (3 GPP). The 3GPP FDD modulo the 8ms period divides the RN backhaul subframe into 8 configuration modes (Pattern). Table 1 shows 8 backhaul subframe configuration modes.

TABLE 1

Backhaul subframe configuration mode (Pattern)	Uplink and downlink subframes within 40ms
		0	8,16,32
1	1,17,33
		2	2,18,26
3	3,11,27
		4	12,28,36
5	13,21,37
		6	6,22,38
7	7,23,31

As shown in table 1, the subframes of each Pattern need to avoid 0,4,5, and 9 subframes. For example, pattern0 contains {8,16,24,32} and actually takes on {8,16,32 }.

Fig. 5 is a schematic diagram of backhaul subframes, and as shown in fig. 5, the DeNB selects some combinations of the 8 patterns for the RN backhaul. FDD RN backhaul Subframe, configurable Subframe Configuration (Subframe Configuration) FDD 8-bit bitmap (bitmap), with 1 or more sets selected as shown in fig. 5. For example, Subframe Configuration FDD is {01010101}, the sequence number of the available Subframe Pattern corresponding to the 40ms period is {1,3,5,7}, and the available Subframe is a combination of {1,17,33}, {3,11,27}, {13,21,37}, and {7,23,31 }.

In addition, in a Time Division Duplex (TDD) system, the DeNB does not schedule the normal user in the subframe used for the RN backhaul, and in order to avoid the normal user from using or measuring the RN backhaul subframe, the RN backhaul subframe is generally configured as an MBMS subframe. Since 0,1,5,6 subframes cannot be used for MBMS, the TDD RN backhaul does not use these subframes, i.e. uses subframes other than these subframes for RN backhaul.

Wherein, table 2 shows TDD subframe configuration cases.

TABLE 2

As shown in table 2, 3GPP TDD Un resources are configured with 10ms as a cycle, and all TDD subframes are configured in proportion, and there are 32 Un backhaul subframe configurations in total. The Un backhaul resource configuration is not flexible, and there are at most 2 non-overlapping sets of Un backhaul subframe configurations in the same TDD subframe matching mode.

For example, in eNB-RN uplink-downlink subframe configuration mode 1 in table 2, only two sets of Un backhaul subframes with TDD subframe

configuration mode index

0,1 do not collide. eNB-RN uplink-downlink subframe configuration mode 2, two sets of Un backhaul subframes with TDD subframe configuration mode indices of 5,6 do not collide, and two sets of Un backhaul subframes with TDD subframe configuration mode indices of 7,8 do not collide.

In addition, fig. 6 is another schematic diagram of subframe backhaul, and as shown in fig. 6, a Un port of a multi-hop relay needs multiple sets of time-division Un backhaul resources. By increasing the backhaul period, the Un backhaul resource of the atomic frame configuration Pattern (subframe configuration Pattern) TDD-r10 ═ x is split into n sets of backhaul subframes offset from 1 to n. And labeling each backhaul subframe. Fig. 6 shows a Un subframe configuration of subframe ConfigPattern TDD-r10 being 0,1, with a total of two backhaul subframes.

Fig. 7 is another schematic diagram of subframe feedback, and fig. 7 shows subframe Config Pattern TDD-r10 being 0, 1. Add TDD backhaul subframe configurations with cyclic period offset of 40ms and cyclic offset of 1,2,3,0, for a total of 8 backhaul subframes.

Further, all RNs have pre-configured backhaul resource pools, such as Subframe Configuration FDD or Subframe Configuration patternttdd-r 10, sharing N sets of Un backhaul resources. The y groups can be taken for returning; the remaining N-y sets of subframes and subframes that cannot be used for RN backhaul are used for normal UE access.

For each RN, when selecting the backhaul subframe, the subframes of the Uu port, the Un (N-1) and the Un (N-2) cannot collide, namely, when determining the backhaul subframe, the RN needs to avoid the backhaul subframes of the Uu port, the Un (N-1) port of the upper-level RN and the Un (N-2) port of the upper-level RN.

Specifically, when the second RN broadcasts the system message, the system message may further include a backhaul subframe configuration mode of the second RN, so that, after the first RN selects a superior RN from the at least one second RN, the first RN may obtain the backhaul subframe configuration mode of the superior RN by analyzing the system message broadcast by the selected superior RN.

In a possible implementation manner, the first RN may acquire the backhaul subframe configuration mode of the upper RN by: the first RN sends a request message to the superior RN, receives a response message sent by the superior RN, and the response message carries a return subframe configuration mode of the superior RN.

Specifically, when the upper RN of the first RN broadcasts the system message, the system message carries the backhaul subframe configuration mode of the upper RN, so that the upper RN reads the backhaul subframe configuration mode of the upper RN, and therefore the first RN may send a request message to the upper RN, and after receiving the request message, the upper RN returns a response message carrying the backhaul subframe configuration mode of the upper RN to the first RN.

In step 404, the first RN selects one backhaul subframe configuration mode as the backhaul subframe configuration mode of the first RN from other backhaul subframe configuration modes except the backhaul subframe configuration mode of the upper RN and the backhaul subframe configuration mode of the upper RN.

In this embodiment, after acquiring the backhaul subframe configuration mode of the upper RN and the backhaul subframe configuration mode of the upper RN, when selecting the backhaul subframe of the first RN, the first RN first needs to avoid the backhaul subframe of the upper RN, that is: the backhaul subframe of the Un (N-2) port cannot be used by the Un (N) port. Fig. 8a is a schematic diagram of backhaul subframe selection, as shown in fig. 8a, when the level 1 RN uses the backhaul subframe configuration mode 1 subframe to transmit back to the level 0 RN through the Un (0) port, the level 2 RN also receives the backhaul subframe configuration mode 1 subframe. Therefore, in order to avoid collision, when the 3-level RN transmits back to the 2-level RN through the Un (2) port, the feedback subframe configuration mode 1 is avoided.

In addition, when the first RN selects the backhaul subframe configuration mode, it needs to avoid the backhaul subframes of the upper RN. Namely: the backhaul subframe of the Un (N-1) port cannot be used by the Un (N) port. Fig. 8b is another schematic diagram of backhaul subframe selection, as shown in fig. 8b, since the 2-level RN transmits backhaul to the 1-level RN via backhaul subframe configuration mode 2, the 2-level RN can no longer use backhaul subframe configuration mode 2 for 3-level RN access, i.e. backhaul subframe configuration mode X can be selected from other backhaul subframe configuration modes except backhaul subframe configuration mode 1 and backhaul subframe configuration mode 2.

Further, when determining the backhaul subframe configuration mode, the first RN needs to avoid the backhaul subframe configuration mode of each third RN in addition to the backhaul subframe configuration mode of the upper RN and the backhaul subframe configuration mode of the upper RN, where the third RN is an RN that can be scanned by the first RNs except the upper RN and the upper RN, that is, needs to avoid the backhaul subframe configuration modes used by all the neighboring RNs that are listened to.

In addition, it is also necessary to avoid the backhaul subframe configuration pattern of the neighbor RN detected by the lower RN and the backhaul subframe configuration pattern of the neighbor RN detected by the upper RN. FIG. 8c is a further schematic diagram of backhaul subframe selection, as shown in FIG. 8c, since the level 1 RN uses backhaul subframe configuration mode 1 to backhaul to the level 0 RN via Un (0) port, the level 2 RN uses backhaul subframe configuration mode 2 to backhaul to the level 1 RN via Un (1) port, and the level 2 RN senses that the neighbor RN Y1 uses the backhaul subframe configuration mode Y1, RN Y2 uses the backhaul subframe configuration mode Y2, the level 1 RN senses that the neighbor RN Z1 uses the backhaul subframe configuration mode Z1, RN Z2 uses the backhaul subframe configuration mode Z2, therefore, the 3-level RN will select the backhaul subframe configuration mode with the least interference for the lower level RN access from the available Un port resources except backhaul subframe configuration mode 1, backhaul subframe configuration mode 2, backhaul subframe configuration mode y1, backhaul subframe configuration mode y2, backhaul subframe configuration mode z1 and backhaul subframe configuration mode z 2. When the ordinary UE accesses, the system reserved N-y group of subframes and FDD subframes {0,4,5,9} or TDD subframes {0,1,5,6} which can not be used for RN backhaul are used.

Another example is: referring to fig. 3, the first RN is RN4, the upper RN of RN4 is RN5, the upper RN is DeNB6, and the peripheral RNs include RN2 and RN8, wherein RN5, DeNB6, RN2 and RN8 broadcast system messages, and each system message includes a backhaul subframe configuration pattern of each RN, for example, the backhaul subframe configuration pattern of RN2 is pattern5, the backhaul subframe configuration pattern of RN5 is pattern2, the backhaul subframe configuration pattern of RN8 is pattern3, and the backhaul subframe configuration pattern of DeNB6 is pattern 1. Therefore, the RN4 will avoid the backhaul subframe configuration pattern of each RN when performing resource coordination, for example, the backhaul subframe configuration pattern can be selected as pattern 4.

Note that, if the RN selects the backhaul subframe configuration Pattern { x1 … }, it indicates the resources used by the backhaul subframe. Information parameter (IE) is a subset of the pre-configured RN backhaul resource; for example, x1 ═ 5 indicates that FDD {13,21,37} is used as a backhaul subframe. Thus, the lower level RN will use x1 as the backhaul subframe when accessing, and when accessing the normal UE, the system will use the reserved N-y sets of subframes and the FDD subframe {0,4,5,9} or TDD subframe {0,1,5,6} that cannot be used for RN backhaul.

In another possible implementation manner, the first RN may also determine a backhaul subframe configuration mode for the lower RN, and accordingly, the backhaul subframe configuration mode of the first RN may also be determined by the upper RN.

Next, the determination of the backhaul subframe configuration mode by the first RN as the lower RN will be described as an example.

The first RN receives a subframe configuration request message sent by the subordinate RN, the subframe configuration request message carries a backhaul subframe configuration mode of at least one fourth RN adjacent to the subordinate RN, the first RN determines the backhaul subframe configuration mode of the subordinate RN according to the backhaul subframe configuration mode of the first RN, the backhaul subframe configuration mode of the upper RN and the backhaul subframe configuration modes of the fourth RNs, the first RN sends a subframe configuration response message to the subordinate RN, and the subframe configuration response message comprises the backhaul subframe configuration mode of the subordinate RN.

Wherein, the fourth RN may be all subordinate RNs of the first RN. Specifically, the lower RN, after accessing the first RN, may transmit a subframe configuration request message to the first RN, the subframe allocation request message includes the backhaul subframe allocation patterns of the neighboring RNs sensed by the subordinate RNs, and after the first RN receives the subframe allocation request message, will acquire its own backhaul subframe configuration mode and the backhaul subframe configuration mode of the upper RN, thus, the first RN will evade the backhaul subframe allocation pattern of the neighboring RN, its own backhaul subframe allocation pattern, and the backhaul subframe allocation pattern of the upper RN, which are sensed by the lower RN, and select the backhaul subframe allocation pattern as the backhaul subframe allocation pattern of the lower RN from the other backhaul subframe allocation patterns except the backhaul subframe allocation pattern of the first RN, the backhaul subframe allocation pattern of the upper RN, and the backhaul subframe allocation patterns of the fourth RNs, and the returned subframe configuration mode is carried in a subframe configuration response message and is sent to the lower RN.

Further, on the basis of the above embodiments, if there is no access of the lower RN/UE or periodic trigger, the RN will exit from the eNB mode and re-enter the UE mode, so as to reselect the upper RN to obtain the shortest backhaul path, or reselect the backhaul subframe of the lower RN to avoid inter-cell interference.

It should be noted that if the first RN searches for a Signal to Interference Ratio (SIR) or a Reference Signal Receiving Power (RSRP) of the surrounding RNs exceeding a predetermined threshold, the first RN may choose not to enter the eNB mode in order to avoid the inter-RN Interference.

In the networking method of the multi-hop relay provided in the embodiment of the present invention, the first RN respectively obtains the backhaul subframe configuration mode of the upper RN and the backhaul subframe configuration mode of the upper RN, and selects one backhaul subframe configuration mode as the backhaul subframe configuration mode of the first RN from other backhaul subframe configuration modes except the backhaul subframe configuration mode of the upper RN and the backhaul subframe configuration mode of the upper RN. Therefore, the conflict between the backhaul subframe configuration mode of the first RN and the backhaul subframe configuration modes of the upper RN and the upper RN can be avoided, so that the subframe backhaul between RNs can be ensured, and the interference between cells can be avoided.

In the following, how each RN determines an upper RN and how to determine a backhaul subframe configuration mode of the RN will be exemplified.

Fig. 9a to 9c are schematic diagrams illustrating a startup process of each RN, as shown in fig. 9a, after RN2 is started, it listens to System messages sent by neighboring RNs, and if RN2 does not listen to System messages sent by other RNs and determines that it has an external interface for communicating with a core network device, it indicates that RN2 is the first started RN, at this time, RN2 sets Hop distance Hop of its own to 0, determines RN resource to be pattern5, and determines Hop to be 0, and resource pattern5 is carried in a System message for broadcast, for example, may be carried in a System Information Block (SIB) for broadcast. In addition, at this time, other RNs will be in UE mode.

As shown in fig. 9b, if RN7 and RN6 are activated, they will also listen to the system messages sent by neighboring RNs, if RN7 only listens to the system message broadcast by RN2, and the Hop distance in the system message is 0, and the resource is pattern5, RN7 determines RN2 as its upper RN, and selects the resource other than pattern5 as its backhaul subframe, if pattern 6 can be selected, at this time, RN7 will change from UE mode to eNB mode, and RN7 determines its Hop distance Hop to 1. RN7 broadcasts hop length 1 and pattern 6 carried in SIB message.

Likewise, RN4 will also determine that RN2 is its own upper-level RN and its Hop distance Hop is 1. In addition, RN4 needs to avoid backhaul subframes of RN2 and RN7, such as pattern3 can be selected. RN4 broadcasts hop length 1 and pattern3 carried in SIB message.

As shown in fig. 9c, if RN5 is activated, it will also listen to the system message sent by the neighboring RN, and if RN5 listens to the system message broadcast by RN7, and the hop distance in the system message broadcast by RN7 is 1, and the resource is pattern 6, RN5 determines RN7 as its upper RN, and selects the resources except for the pattern 6 and the backhaul subframe of the neighboring RN, such as pattern 4.

Similarly, RN1, RN3, and RN6 may also select the upper RN and backhaul subframe configuration mode in the same manner, thereby not only completing the multi-hop relay networking, but also ensuring the subframe backhaul between RNs, and avoiding the inter-cell interference.

Fig. 10 is a schematic structural diagram of a first embodiment of a multi-hop relay networking device according to an embodiment of the present invention. The networking device of the multi-hop relay may be an independent relay node RN, or may be a device integrated in the relay node RN, and the device may be implemented by software, hardware, or a combination of software and hardware. As shown in fig. 10, the apparatus includes:

the interception module 11 is used for intercepting system messages;

the determining module 12 is configured to determine, when the first RN listens to system messages broadcast by at least one second RN, an upper-level RN of the first RN from the at least one second RN according to relevant information of each second RN included in each of the system messages.

The networking device for multihop relay provided in the embodiment of the present invention may implement the method embodiment shown in fig. 2, and the implementation principle and technical effect are similar, which are not described herein again.

Fig. 11 is a schematic structural diagram of a second embodiment of a multi-hop relay networking device according to the embodiment of the present invention, where on the basis of the embodiment shown in fig. 10, the device further includes: and a judging module 13.

When the first RN does not listen to the system message broadcast by the second RN, the determining module 13 determines whether the first RN has an external interface connected to a core network device;

the determining module 12 is further configured to determine the first RN as a first-level RN when the first RN has the external interface.

Optionally, the related information includes a hop distance; the determining module 12 is specifically configured to:

Optionally, the related information includes a backhaul bandwidth of the second RN; the determining module 12 is specifically configured to:

Optionally, the related information includes a hop distance and a backhaul bandwidth of the second RN;

the determining module 12 is specifically configured to:

according to a preset weight value, weighting the hop distance and the return bandwidth of each second RN to obtain a weighting result; the backhaul bandwidth is obtained by taking the backhaul bandwidth from the first RN to the 0 th-level RN to be small or performing weighted average processing on the backhaul bandwidth of each RN;

and when the hop distances of the second RNs are the same, determining the second RN with the largest weighting result as the superior RN.

Fig. 12 is a schematic structural diagram of a third embodiment of a multi-hop relay networking device according to the embodiment of the present invention, and based on the embodiment shown in fig. 10, the system message further includes a backhaul subframe configuration mode of the second RN; the device further comprises: an acquisition module 14 and a selection module 15.

The acquiring module 14 is configured to acquire the backhaul subframe configuration mode of the upper RN and the backhaul subframe configuration mode of the upper RN, respectively;

the selecting module 15 is configured to select one backhaul subframe configuration mode as the backhaul subframe configuration mode of the first RN from other backhaul subframe configuration modes except the backhaul subframe configuration mode of the upper RN and the backhaul subframe configuration mode of the upper RN.

Optionally, the selecting module 15 is further configured to select one backhaul subframe configuration mode from other backhaul subframe configuration modes except the backhaul subframe configuration mode of the upper RN, and the backhaul subframe configuration modes of the third RNs as the backhaul subframe configuration mode of the first RN; the third RN is an RN capable of being scanned except for the upper RN and the upper RN.

Optionally, the obtaining module 14 is specifically configured to:

sending a request message to the upper RN;

Fig. 13 is a schematic structural diagram of a fourth embodiment of a multi-hop relay networking device according to the embodiment of the present invention, where on the basis of the embodiment shown in fig. 10, the device further includes: a receiving module 16 and a transmitting module 17.

The receiving module 16 is configured to receive a subframe configuration request message sent by a subordinate RN; the subframe configuration request message carries a backhaul subframe configuration mode of at least one fourth RN adjacent to the subordinate RN;

the determining module 12 is further configured to determine the backhaul subframe configuration mode of the lower RN according to the backhaul subframe configuration mode of the first RN, the backhaul subframe configuration mode of the upper RN, and the backhaul subframe configuration modes of the fourth RNs;

the sending module 17 sends a subframe configuration response message to the subordinate RN, where the subframe configuration response message includes a backhaul subframe configuration mode of the subordinate RN.

Optionally, the determining module 12 is further configured to select one backhaul subframe configuration mode from other backhaul subframe configuration modes except the backhaul subframe configuration mode of the first RN, the backhaul subframe configuration mode of the upper RN, and the backhaul subframe configuration modes of the fourth RNs as the backhaul subframe configuration mode of the lower RN.

The networking device for multihop relay provided by the embodiment of the present invention may implement the corresponding method embodiment, and its implementation principle and technical effect are similar, which are not described herein again.

Fig. 14 is a schematic structural diagram of a relay node according to an embodiment of the present invention. The relay node includes: a processor; a memory and a computer program, wherein the computer program is stored in the memory and configured to be executed by the processor, the computer program comprising instructions for performing the method of any of the embodiments above.

The embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and the computer program enables a server to execute the data anti-capture method provided in any of the foregoing embodiments.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A networking method of multi-hop relay is characterized by comprising the following steps:

a first Relay Node (RN) listens for a system message;

if the first RN listens to system messages broadcasted by at least one second RN, determining a superior RN of the first RN from the at least one second RN according to related information of the second RNs included in each system message;

the related information includes a hop distance and a backhaul bandwidth of the second RN;

2. The method of claim 1, further comprising:

3. The method according to claim 1, wherein the system message further includes backhaul subframe configuration pattern of the second RN;

4. The method of claim 3, further comprising:

5. The method according to claim 3 or 4, wherein obtaining the backhaul subframe configuration mode of the upper layer RN comprises:

the first RN sends a request message to the superior RN;

6. The method of claim 4, further comprising:

7. The method according to claim 6, wherein the first RN determines the backhaul subframe configuration mode of the subordinate RN according to the backhaul subframe configuration mode of the first RN, the backhaul subframe configuration mode of the superior RN, and the backhaul subframe configuration mode of each of the fourth RNs, and comprises:

8. The method according to claim 1, wherein backhaul subframes are divided into n sets of backhaul subframes and are numbered such that the first RN selects at least one set of backhaul subframes from the n sets of backhaul subframes for backhaul.

9. A networking apparatus for multihop relay, comprising:

the monitoring module is used for monitoring system messages;

a determining module, configured to determine, when a first RN listens to a system message broadcasted by at least one second RN, a higher-level RN of the first RN from the at least one second RN according to relevant information of each second RN included in each system message;

the determining module is specifically configured to: according to a preset weight value, weighting the hop distance and the return bandwidth of each second RN to obtain a weighting result; the backhaul bandwidth is obtained by taking the backhaul bandwidth from the first RN to the 0 th-level RN to be small or performing weighted average processing on the backhaul bandwidth of each RN;

10. The apparatus of claim 9, further comprising:

11. The apparatus of claim 9, wherein the system message further includes a backhaul subframe configuration pattern of the second RN;

the device further comprises:

12. A relay node, comprising:

a processor;

a memory; and

a computer program;

wherein the computer program is stored in the memory and configured to be executed by the processor, the computer program comprising instructions for performing the method of any of claims 1-8.

13. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program that causes a relay node to perform the method of any of claims 1-8.