WO2019114670A1

WO2019114670A1 - Access method and device for relay system

Info

Publication number: WO2019114670A1
Application number: PCT/CN2018/120157
Authority: WO
Inventors: 卓义斌; 王振宇; 秦熠; 栗忠峰
Original assignee: 华为技术有限公司
Priority date: 2017-12-12
Filing date: 2018-12-10
Publication date: 2019-06-20
Also published as: CN109922512A

Abstract

The present application discloses an access method and a device for a relay system, for resolving an existing issue of the prior art in which signaling overhead is high when selecting a more suitable relay apparatus for access. The method comprises: a first relay apparatus broadcasting a first priority level, the first priority level indicating a priority level of the first relay apparatus determined according to at least one of the following parameters: a hop number between the first relay apparatus and a base station, an apparatus performance parameter of the first relay apparatus, and a network performance parameter of the first relay apparatus, and the first priority level being the highest priority level in priority levels received by a second relay apparatus; and the first relay apparatus receiving an access request sent by the second relay apparatus.

Description

Relay system access method and device

This application claims the priority of the Chinese Patent Application, filed on Dec. 12, 2017, filed Jan. In this application.

Technical field

The present application relates to the field of information technology, and in particular, to a method and an apparatus for accessing a relay system.

Background technique

In a wireless communication system, in order to improve the coverage of a base station, a relay transmission technology is introduced, that is, a signal transmitted between a base station and a user equipment (UE) is forwarded through a relay device to improve the system. Stability and throughput. The architecture of the relay system can be as shown in FIG. 1, including node 1 (base station), node 2 (relay device), node 3 (relay device), node 5 (relay device), node 6 (relay device) , node 7 (relay device) and node 4 (UE).

In the relay system, before the communication between the base station and the relay device, between the relay device and the relay device, between the relay device and the UE, and between the base station and the UE, the relay is first performed. The device or the UE accesses the relay system. At present, the commonly used relay system access method is that the connected relay device periodically broadcasts the downlink synchronization signal and the number of hops of the device from the base station, and the device to be accessed (refers to the relay device to be accessed or to be connected) The incoming UE selects an accessed device to access according to the received hop count information and the received signal strength of the downlink synchronization signal. Taking the relay system shown in FIG. 1 as an example, the node 1, the node 2, the node 3, the node 5, the node 6, and the node 7 periodically broadcast downlink synchronization information, where the downlink synchronization information carries the downlink synchronization signal and the device and the device The hop count between the base stations, and the hop count information broadcasted by each node and the downlink synchronization signal broadcasted by the node reach the signal strength of the device to be accessed, at node 1, node 2, node 3, node 5. Select one of the nodes 6 and 7 to access.

However, the device to be accessed selects the relay device to access only according to the hop count information and the signal strength of the downlink synchronization signal, and the selected relay device may not be the most suitable. If the device to be accessed combines multiple hops and loads of the relay device, it can select a more suitable relay device for access. However, if the relay device is connected to the broadcasted downlink information. Adding multiple information such as hop count and load at the same time will increase the signaling overhead.

Summary of the invention

The present invention provides a method and an apparatus for accessing a relay system, which are used to solve the problem of relatively large signaling overhead when selecting a more suitable relay device for access in the prior art.

In a first aspect, the present application provides a method for accessing a relay system, where a first relay device is configured according to a hop count between the first relay device and a base station, and a device performance parameter of the first relay device. At least one of the network performance parameters of the first relay device determines a first priority, and broadcasts the first priority, so that the first priority is a priority received by the second relay device. At the highest priority, the second relay device sends an access request to the first relay device.

Compared with the information that the first relay device broadcasts the uplink hop count, the load, the number of connections, and the like in the prior art, the second relay device selects a more suitable relay device to access according to the multiple information, In the embodiment of the present application, the first relay device determines the first priority according to at least one of the device performance parameter of the first relay device and the network performance parameter of the first relay device, and broadcasts the priority, due to the priority. The information is a comprehensive measurement index of at least one of the device performance parameter of the first relay device and the network performance parameter of the first relay device, and may use less bit information when characterizing the priority, thereby The signaling overhead can be effectively reduced, and the second relay device can select a more suitable relay device to access according to the received priority.

In a possible design, the first relay device may scramble the downlink broadcast signal as the scrambling parameter and broadcast the scrambled downlink broadcast signal. Alternatively, the first relay device may broadcast a downlink synchronization signal corresponding to the first priority. In this way, by implicitly carrying the first priority in the downlink broadcast signal for broadcast, the signaling overhead can be further effectively saved.

In a possible design, the first relay device may further allocate different synchronization signal resources for each priority in advance, and then map the first priority to a corresponding one after determining the first priority. Synchronizing the signal resources, so that the second relay device determines the first priority by the received synchronization signal resource. In this way, the first priority can be broadcasted without adding additional channel resources, which can further effectively save signaling overhead.

In a possible design, the device performance parameter of the first relay device may include, but is not limited to, at least one of the following: a load of the first relay device, and a relationship between the first relay device and a base station The number of communication paths. The network performance parameter of the first relay device may include, but is not limited to, at least one of the following: a channel remaining capacity of the first relay device, and a first N hop communication link between the first relay device and a base station Channel quality. The N is an integer greater than 0 and less than or equal to the number of hops between the first relay device and the base station. In this way, the first priority may be used to represent device performance parameters (including information such as load) of the first relay device, so that the second relay device may select a more suitable relay device for access according to the priority.

In a possible design, when determining the first priority, the first relay device may first determine a target index of the first relay device, and then according to the first relay device. The target index determines the first priority. The target index of the first relay device meets the following formula:

P=α*N _hop +δ*W _load +β*N _connection +σ*C _remain +ε*Q;

Wherein, P represents a target index of the first relay device, N _hop represents a hop count between the first relay device and a base station, W _load represents a _{load of} the first relay device, and N _connection represents a The number of communication paths between the first relay device and the base station, C _remain represents the channel remaining capacity of the first relay device, and Q represents the first N hop communication link between the first relay device and the base station. The channel quality, α, δ, β, σ, ε, represents the weight.

In this way, the first priority may be determined according to the hop count between the first relay device and the base station, the device performance parameter of the first relay device, and the network performance parameter of the first relay device, so that the first priority According to the priority, the two relay devices can select a more suitable relay device for access.

In a possible design, after the first relay device receives the access request sent by the second relay device, the first relay device may receive the first hop sent by the second relay device. number. The first hop count is a hop count between the second relay device and the end device. The end device is a last-level device that accesses the second relay device. And the first relay device receives the second hop count sent by the third relay device; the second hop count is the hop count between the third relay device and the base station. Then, when the sum of the first hop count and the second hop count is not greater than the preset hop count, the first relay device sends an access request to the third relay device.

After the second relay device accesses the first relay device, the second relay device sends bottom-up hop count information (first hop count) to the first relay device, so that the first relay device can receive the first hop according to the first hop. The number of the second hops determines whether the total number of hops on the communication path to be established is greater than the preset hop count, so that the newly established communication path after the first relay device accesses the third relay device can be avoided. The total number of hops on the interface is too large, resulting in poor communication quality. The above design may be further used on the basis of the method provided in the first aspect of the embodiment of the present application, or may be used as a separate solution.

In a possible design, the first relay device receives the second priority sent by the fourth relay device. The second priority is used to indicate a priority of the fourth relay device. Then, the first relay device sends an access request to the fourth relay device when the second priority is greater than the first priority. The priority of the parent node in the relay system is usually greater than the priority of the child node, so the priority (first priority) of the first relay device is greater than the priority of the second relay device. The first relay device sends an access request to the relay device with a higher priority than the first priority, so that the first relay device can be prevented from sending an access request to the second relay device, so that two relay devices can be avoided. Initiating access to each other leads to an access violation.

In a second aspect, the present application provides a method for accessing a relay system, where a first relay device receives a random access request sent by a second relay device, and sends a random access response message to the second relay device. . Then, the first relay device receives the third message MSG-3 sent by the second relay device. The identity of the second relay device is carried in the MSG-3. The identity of the second relay device may be a unique identifier that identifies the second relay device, such as a physical cell identifier (PCI) of the second relay device or a number identifier of the relay node. . In this way, the second relay device can carry the identity of the second relay device in the MSG-3, so that the first relay device can determine the identity of the child node of the first relay device (ie, the second relay). The identity of the device, so that the first relay device can exclude the device corresponding to the identity of the child node of the first relay device when selecting the relay device to access, so that the two relay devices can avoid each other from each other. Initiating an access results in an access violation. The method provided in the second aspect of the embodiment of the present application may be used as an independent solution, or may be further used on the basis of the method provided in the first aspect of the embodiment of the present application.

In a possible design, the first relay device receives the access request sent by the fifth relay device, and the identity of the fifth relay device and the identity of the child node of the first relay device (ie, When the identity of the two relay devices is different, an access request is sent to the fifth relay device. In this way, the first relay device sends an access request to the fifth relay device when determining that the fifth relay device is not its own child node, so that two relay devices can be prevented from initiating access to each other to cause an access conflict.

In a third aspect, the application provides a method for accessing a relay system, where the first relay device broadcasts a parent node identifier of the first relay device. The parent node identifier of the first relay device is an identifier of the relay device accessed by the first relay device. In this way, the first relay device broadcasts the parent node identifier of the first relay device, so that the device corresponding to the parent node identifier of the first relay device does not forward to the first relay after receiving the information broadcast by the first relay device. The device sends an access request, so that two relay devices can be prevented from initiating access to each other, resulting in an access conflict. The method provided in the third aspect of the embodiments of the present application may be used as a separate solution, or may be further used on the basis of the method provided in the first aspect of the embodiment of the present application.

In a possible design, the first relay device receives an access request sent by the fifth relay device. The access request is sent by the fifth relay device when the parent node information of the first relay device is different from the identifier of the fifth relay device. In this way, the fifth relay device sends an access request to the first relay device when the parent node information of the first relay device is different from the identifier of the fifth relay device, that is, the fifth relay device is The first relay device is determined not to send its own access request to the first relay device, so that the two relay devices can prevent each other from initiating access to each other and cause an access conflict.

In a fourth aspect, the embodiment of the present application provides a first relay device, including: a broadcast sending module, configured to broadcast a first priority; the first priority is used to indicate a priority of the first relay device The priority of the first relay device is determined according to at least one of the following parameters: a hop count between the first relay device and a base station, a device performance parameter of the first relay device, and a location The network performance parameter of the first relay device, where the first priority is the highest priority among the priorities received by the second relay device. And a receiving module, configured to receive an access request sent by the second relay device.

In one possible design, the first relay device further includes a scrambling module. The scrambling module is configured to scramble the downlink broadcast signal by using the first priority as a scrambling parameter. The broadcast sending module is specifically configured to: broadcast the downlink broadcast signal scrambled by the scrambling module.

In a possible design, the broadcast sending module is specifically configured to: broadcast a downlink synchronization signal corresponding to the first priority.

In a possible design, the device performance parameter of the first relay device includes at least one of the following: a load of the first relay device, a number of communication paths between the first relay device and a base station . The network performance parameter of the first relay device includes at least one of: a channel remaining capacity of the first relay device, and a channel quality of a first N hop communication link between the first relay device and a base station; The N is an integer greater than 0 and less than or equal to the number of hops between the first relay device and the base station.

In a possible design, the first relay device further includes a determining module, and the determining module is configured to determine the first priority by determining a target index of the first relay device, And determining the first priority according to the target index of the first relay device. The target index of the first relay device conforms to the following formula:

P=α*N _hop +δ*W _load +β*N _connection +σ*C _remain +ε*Q;

In a possible design, the receiving module is further configured to: after receiving the access request sent by the second relay device, receive the first hop count sent by the second relay device. The first hop count is a hop count between the second relay device and the end device; the end device is a last-level device that accesses the second relay device. And receiving the second hop count sent by the third relay device. The second hop count is a hop count between the third relay device and the base station. The broadcast sending module is further configured to: when the sum of the first hop count received by the receiving module and the second hop count received by the receiving module is not greater than a preset hop count, to the third The relay device sends an access request.

In a possible design, the receiving module is further configured to receive a second priority sent by the fourth relay device. The second priority is used to indicate a priority of the fourth relay device. The broadcast sending module is further configured to send an access request to the fourth relay device when the second priority received by the receiving module is greater than the first priority.

In a fifth aspect, the application provides a first relay device, including: a receiving module, configured to receive a random access request sent by a second relay device. And a sending module, configured to send a random access response message to the second relay device. The receiving module is further configured to receive a third message MSG-3 sent by the second relay device. The identity of the second relay device is carried in the MSG-3.

In a possible design, the receiving module is further configured to receive an access request sent by the fifth relay device. The sending module is further configured to send an access request to the fifth relay device when the identity of the fifth relay device is different from the identity of the second relay device.

In a sixth aspect, the application provides a first relay device, including: a broadcast sending module, configured to broadcast a parent node identifier of the first relay device. The parent node identifier of the first relay device is an identifier of the relay device accessed by the first relay device.

In a possible design, the first relay device further includes a receiving module. The receiving module is configured to receive an access request sent by the fifth relay device. The access request is sent by the fifth relay device when the parent node information of the first relay device is different from the identifier of the fifth relay device.

In a seventh aspect, the present application provides a first relay device, including: a transceiver, a memory, and a processor, where the memory is used to store program code that the processor needs to execute. The transceiver is used for data transmission and reception between the first relay device and other relay devices. The processor is configured to execute the program code stored in the memory, and is specifically for performing the method described in any one of the first aspect to the third aspect.

In an eighth aspect, the present application further provides a computer readable storage medium for storing computer software instructions for performing the functions of any one of the aspects of any of the first to third aspects A program designed to perform any of the designs of any of the first to third aspects above.

In a ninth aspect, the embodiment of the present application provides a computer program product comprising instructions, when executed on a computer, causing a computer to perform the above first aspect or any one of the first aspect to the third aspect Any of the aspects of the method described.

In a tenth aspect, an embodiment of the present application provides a chip, where the chip is connected to a memory, and is configured to read and execute a software program stored in the memory, so as to implement the foregoing aspects to the third aspect. A method provided by any one of the aspects or any aspect of the design.

DRAWINGS

1 is an architectural diagram of a relay system provided by the present application;

2 is a schematic flowchart of a method for accessing a relay system according to the present application;

FIG. 3 is a schematic flowchart of a method for accessing a relay system according to the present application;

4 is a schematic flowchart of a method for accessing a relay system according to the present application;

FIG. 5 is a schematic flowchart diagram of a method for accessing a relay system according to the present application;

FIG. 6 is a schematic structural diagram of a first relay device provided by the present application;

FIG. 7 is a schematic structural diagram of a first relay device provided by the present application;

FIG. 8 is a schematic structural diagram of a first relay device provided by the present application;

FIG. 9 is a schematic structural diagram of a first relay device provided by the present application.

Detailed ways

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

The network architecture and the service scenario described in the embodiments of the present application are for the purpose of more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation of the technical solutions provided by the embodiments of the present application. The technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

The relay system access method provided by the present application can be applied to a relay system. The relay system may adopt a system architecture as shown in FIG. 1, wherein the node 1 (base station) does not directly send a signal to the node 4 (user equipment), but first transmits to the node 2 (relay device), and the node 2 Forwarded to node 3 (relay device), and then forwarded by node 3 to node 4 (relay device). The relay system involved in the embodiment of the present application may be single-hop or multi-hop. The single-hop relay system only forwards signals through one relay device, and the multi-hop relay system may pass multiple relays. The device forwards the signal. The relay system according to the embodiment of the present application may be various types of communication systems, for example, may be long term evolution (LTE), may be a fifth generation (5G) communication system, or may be a hybrid architecture of LTE and 5G. .

The base station may be an ordinary base station (such as a Node B or an eNB), a new radio controller (NR controller), a gNode B (gNB) in a 5G system, a centralized network unit, a new wireless unit. The base station, the radio remote module, the micro base station, the distributed network unit, the transmission reception point (TRP), or the transmission point (TP) or any other wireless access device, Limited to this.

The relay device may be an ordinary base station (such as a Node B or an eNB), an NR controller, a gNB in a 5G system, a Centralized Unit, a base station in a future mobile communication system, a new wireless base station, a radio remote module, a micro base station, and a distributed unit. The embodiment of the present application is not limited to the access node in the WIreless-Fidelity (WiFi) system, the TRP or the TP, or any other wireless access device.

A user equipment (UE) is a terminal device, which is a device that provides voice and/or data connectivity to a user, for example, a handheld device with a wireless connection function, an in-vehicle device, and the like. Common terminals include, for example, mobile phones, tablets, notebook computers, PDAs, mobile internet devices (MIDs), wearable devices such as smart watches, smart bracelets, pedometers, and the like.

In the relay system, before the communication between the base station and the relay device, between the relay device and the relay device, and between the relay device and the user device, the synchronization between the devices is first completed, and only after the synchronization is completed. In order to ensure the normal progress of the subsequent communication process. Specifically, the to-be-access device (including the relay device or the UE that is not connected to the relay system) broadcasts on the received access device (including the base station in the relay system or the relay device that has accessed the relay system). After the downlink synchronization signal and the hop count information, the base station in the relay system or the relay device that has accessed the relay system is selected to initiate a random access process, so that synchronization with the relay system can be completed.

Taking a relay device (node 8) to access the relay system shown in FIG. 1 as an example, node 1, node 2, node 3, node 5 (relay device), node 6 (relay device), node 7 ( The relay device periodically broadcasts the downlink synchronization signal and the hop count between the node and the base station, and the node 8 reaches the signal strength of the node 8 according to the hop count information broadcasted by each node and the downlink synchronization signal broadcast by the node, at the node. 1. Node 2, node 3, node 5, node 6, and node 7 select a node with a small number of hops and a large signal strength to access. However, the node selected only according to the hop count information and the signal strength may not be the most suitable. For example, according to the hop count information and the signal strength, it is found that the node 2 is more suitable than the node 3, but since the load of the node 2 is relatively large, The load of node 3 is relatively small. When node 8 accesses node 3, the communication quality is better than that of node 8 when accessing node 2, that is, node 8 is more node 2 than node 2 when selecting the node to access. Suitable. It can be seen that the device to be accessed can select a more suitable relay device to access if it can combine the hop count information and load of the accessed relay device when selecting the accessed relay device. In this way, the connected relay device needs to broadcast multiple information such as the hop count and the load, but multiple information such as the number of broadcast hops and the load may cause an increase in signaling overhead.

The present invention provides a method and an apparatus for accessing a relay system, which are related to the problem that a signaling overhead is relatively large when a more suitable relay device is selected for access in the prior art. The method and the device are based on the same inventive concept. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and the repeated description is not repeated.

2 is a flowchart of a method for accessing a relay system provided by the present application. The method can be applied to the relay system shown in FIG. 1, and the method includes:

S201. The first relay device broadcasts the first priority. The first relay device may be any one of at least one relay device included in the relay system, and the first relay device may of course be a base station in the relay system. The first priority may be used to indicate the priority of the access performance of the first relay device. The higher the first priority, the better the access performance of the first relay device is.

In a possible implementation, the first relay device may determine the first according to the hop count between the first relay device and the base station, the device performance parameter of the first relay device, and the network performance parameter of the first relay device. priority.

The device performance parameter of the first relay device may include, but is not limited to, a load including the first relay device, a number of communication paths between the first relay device and a base station, and the like. The load of the first relay device may indicate the signaling throughput of the first relay device in a unit time, and may also represent the traffic volume of the first relay device in a unit time, and may also represent the first relay device. The embodiment of the present application is not specifically limited herein. The number of communication paths between the first relay device and the base station may represent the sum of the number of primary links and the number of secondary links established between the first relay device and the base station. Taking the relay system shown in Figure 1 as an example, a primary link is established between node 3 and node 1, namely node 1 -> node 2 -> node 3, assuming that node 3 and node 1 are also established. The auxiliary link, that is, node 1 -> node 5 -> node 3, therefore, the number of communication paths between node 3 and node 1 is 2.

The network performance parameter of the first relay device may be, but not limited to, including a channel remaining capacity of the first relay device, a channel quality of a first N-hop communication link between the first relay device and a base station, and the like. . The N is an integer greater than 0 and less than or equal to the number of hops between the first relay device and the base station. The channel quality of the first N-hop communication link between the first relay device and the base station may be represented by an index.

S202. The second relay device receives the first priority broadcast by the first relay device, where the first priority may be represented by one bit or multiple bits, so that the first relay device directly sends the first priority. A large amount of information, such as the number of hops between the relay device and the base station, the device performance parameter of the first relay device, and the network performance parameter of the first relay device, to the second relay device may generate less signaling overhead.

S203. The second relay device sends the access to the first relay device when the first priority is the highest priority among all the priorities received by the second relay device. request. The second relay device may be a relay device to be accessed by the relay system, or may be a UE to be accessed by the relay system.

In the embodiment of the present application, the hop count between the first relay device and the base station, the device performance parameter of the first relay device, and the network performance parameter of the first relay device by using the first relay device At least one of determining a first priority, and then broadcasting the first priority, so that the second relay device is in the first priority when the first priority is the highest priority among the priorities received by the second relay device A relay device sends an access request. A relay device broadcast that has been connected to the relay system is required to access the relay system when the relay device to be connected to the relay system selects another relay device that is more suitable to access the relay system to access the relay system. The hop count, the load, and the remaining capacity of the channel need to generate more signaling overhead. In the embodiment of the present application, the relay device that has accessed the relay system may use its own hop count to the base station, and its own Information such as device performance parameters and network performance parameters to determine a priority for characterizing the access performance of the relay device that has accessed the relay system and to broadcast the priority, since the priority information is integrated and measured An index obtained by the relay device's own hop count to the base station, its own device performance parameters, and network performance parameters, and since the priority only needs to occupy less bit information, the letter can be effectively reduced. The overhead is made, and the relay devices of other relay systems to be accessed can be selected according to the priority information respectively broadcasted by the relay devices of the received relay system. The relay device accesses the relay system. It should be noted that the first priority may also be the priority of the relay device that is most suitable for providing the relay service to the second relay device among all the relay devices that are available for the second relay device. Alternatively, the second relay device may determine, according to the first priority, that the first relay device corresponding to the first priority is the most suitable (or suitable) to provide the relay service for the second relay device.

Determining, by the first relay device, a first priority of the first relay device according to a hop count between the first relay device and the base station, a device performance parameter of the first relay device, and a network performance parameter of the first relay device, It can be, but is not limited to, implemented as follows:

method one:

The first relay device determines a target index of the first relay device, and the target index of the first relay device conforms to the following formula:

P=α*N _hop +δ*W _load +β*N _connection +σ*C _remain +ε*Q;

The first relay device determines the first priority according to a target index of the first relay device.

In a possible implementation manner, the first relay device may determine the first priority according to a first correspondence relationship and a target index of the first relay device. The first correspondence may be used to indicate a correspondence between each priority and a different target index range. The first correspondence can be as shown in Table 1.

Table 1

优先级priority	11	22	33	44
目标指数范围Target index range	[P ₀，+∞) [P ₀ , +∞)	[P ₁，P ₀) [P ₁ , P ₀ )	[P ₂，P ₁) [P ₂ , P ₁ )	(-∞，P ₂) (-∞, P ₂ )

In another possible implementation, the first relay device may further round the target index of the first relay device, and then round the target index of the first relay device. An integer is used as the first priority. For example, the target index of the first relay device is 5.12346, and the first relay device rounds the target index of the first relay device to obtain 5, so the first priority may be determined to be 5.

The rounding method may be rounded off, rounded down, rounded up, etc., and the embodiment of the present application is not specifically limited herein. Among them, rounding up, that is, determining the smallest integer larger than yourself. Round down to determine the largest integer smaller than yourself. Rounding off, which determines the nearest integer to yourself.

Method 2:

The first relay device determines the number of the first relay devices that satisfy the condition among the plurality of preset conditions as follows. Wherein, the plurality of preset conditions may be, but not limited to, including the following conditions:

Condition 1: The number of hops between the first relay device and the base station is less than or equal to a. a is an integer greater than zero.

Condition 2: The number of communication paths between the first relay device and the base station is greater than or equal to b. b is an integer greater than zero.

Condition 3: The load of the first relay device is less than or equal to c, and c is an integer greater than 0.

Condition 4: The channel remaining capacity of the first relay device is greater than or equal to d, and d is an integer greater than 0.

Condition 5: The channel quality of the first N-hop communication link between the first relay device and the base station is greater than or equal to e, and e is an integer greater than 0.

The first relay device may determine the first priority according to the following second correspondence and the number of conditions that the first relay device meets the condition. The second correspondence may be used to indicate a correspondence between the priority and the number of conditions. The second correspondence can be as shown in Table 2.

Table 2

优先级priority	11	22	33	44	55	66
满足条件的数量Number of conditions	55	44	33	22	11	00

The first relay device determines a condition that the first relay device can meet the plurality of preset conditions, where the plurality of preset conditions may be any one of the condition 1 to the condition 5 or the plurality of conditions in the second mode. combination.

The first relay device determines the first priority according to the following third correspondence and the condition that the first relay device meets. The third correspondence may be used to indicate a correspondence between the priority and the satisfied condition. The third correspondence can be as shown in Table 3.

table 3

In addition, the first relay device may further determine the first priority according to the type of the parent node of the first relay device, where the parent node of the first relay device is the device accessed by the first relay device. The incoming device may be a relay device that has access to the relay system, or it may be a base station in the relay system. The priority of the relay device whose parent node is the base station is higher than the priority of the relay device whose parent node is the relay device. Alternatively, the first relay device may further determine the first priority according to the hop count between the first relay device and the base station, and the priority of the relay device with fewer hops is higher than the priority of the relay device with more hops . Alternatively, the first relay device may further determine the first priority according to the load condition of the first relay device, and the priority of the small load device is higher than the priority of the heavy load relay device. Of course, the first relay device may determine the first priority by other means, and the embodiment of the present application is not specifically limited herein.

Certainly, the first relay device may not broadcast the first priority determined above, but directly broadcast the hop count between the first relay device and the base station, and the device performance parameter of the first relay device (including the first Information such as the load of the device and the network performance parameters of the first relay device (including the remaining channel capacity of the first relay device, etc.), and the second relay device integrates the relay device selected for access. Considering the hop count of each relay device, the device performance parameter of the device, and the network performance parameter of the device, an appropriate relay device is selected to access the relay system. However, this solution can only improve the selection of the device to be accessed to a more suitable relay device to access the relay system, and does not save the signaling overhead.

The second relay device can select a suitable relay device to access the relay system when considering the hop count of each relay device, the device performance parameter of the device, and the network performance parameter of the device. The order is considered in turn. The preset order refers to the order in which each information in the information such as the hop count, the device performance parameter of the device, and the network performance parameter of the device is considered. For example, the preset order is: hop count > number of communication paths > load > channel remaining capacity > channel quality of the pre-N hop communication link. When selecting a suitable relay device to access the relay system, the second relay device may first consider the number of hops broadcast by each relay device, and then when the hop count is the same Considering the number of communication paths broadcast by each relay device, if the number of hop count information and the number of communication paths are the same, then the load broadcast by each relay device is considered, and so on.

In a possible implementation manner, when the first relay device broadcasts the first priority, the broadcast may be performed by means of displaying the indication, or may be broadcasted by means of an implicit indication. The embodiment of the present application does not do this. Specifically limited.

The manner of displaying the indication is that the first relay device configures the first priority in the master information block (MIB) information, or the system information block (SIB) information in the LTE, or the new air interface. (remaining minimum system information (RMSI) information in the (now radio, NR), broadcast information such as system information (OSI), and then broadcast, so that the second relay device receives After the information broadcast by the first relay device, the first priority carried in the broadcast information such as the MIB information, or the SIB information in the LTE, or the RMSI information in the NR is acquired.

The implicit indication manner may be, but is not limited to, any one of the following three manners. By broadcasting the first priority in an implicit manner, the signaling overhead can be further effectively saved:

Manner 1: The first relay device scrambles the downlink broadcast signal with the first priority as a scrambling parameter, and broadcasts the scrambled downlink broadcast signal. The downlink broadcast signal may be a primary synchronization signal, a secondary synchronization signal, a synchronization signal block (SS block) in the NR, a physical broadcast channel block (PBCH blocks), or the like.

In another possible implementation manner, the first relay device may also use the first priority as a scrambling parameter to scramble a demodulation reference signal (DMRS) sequence on a downlink broadcast channel. And broadcast the scrambled DMRS signal.

In another possible implementation manner, the first relay device may also add a first priority as a scrambling parameter to a cyclic redundancy check (CRC) code on a downlink broadcast channel. Disturb.

Manner 2: The first relay device broadcasts a downlink synchronization signal corresponding to the first priority.

In a possible implementation manner, the first relay device may group multiple types of downlink synchronization signals in advance, each group corresponding to one priority, so that the first relay device is in the first priority corresponding to the packet. Select a downlink synchronization signal to broadcast.

In another possible implementation manner, the first relay device may allocate a downlink synchronization signal for each priority in advance, and after determining the first priority, broadcast a downlink synchronization signal corresponding to the first priority.

Manner 3: The first relay device allocates different synchronization signal resources for each priority in advance, and then, after determining the first priority, maps the first priority to the corresponding synchronization signal resource, so that The two relay devices determine the first priority by receiving the synchronization signal resource of the first priority.

The resource mapping mode may be any one of the following three modes: time division multiplexing (TDM), frequency division multiplexing (FDM), or code division multiplexing (CDM). ). In the time domain, different synchronization signal resources may refer to different time domain resources, where the time domain resources include any one of the following: a frame, a subframe, a slot, and a symbol. , mini-slot, configure different offset values in the same cycle. In the frequency domain, different synchronization signal resources may refer to different frequency domain resources, and the frequency domain resources include any one of the following: a resource block (RB) and a subcarrier. On the code domain, different sync signal resources may refer to different codeword sequences.

For example, the priority 1 corresponds to the time-frequency resource block 1 and the priority 2 corresponds to the time-frequency resource block 2.....the priority n corresponds to the time-frequency resource block n, so that the first relay device uses the priority after determining the priority. The corresponding time-frequency resource broadcasts related information, and the second relay device can obtain the priority determined by the first relay device after receiving the time-frequency resource broadcast by the first relay device on the corresponding time-frequency resource. information. Therefore, the relay device that has been accessed in the relay system can be selected to access the more suitable relay device without consuming any additional signaling overhead.

In addition, in the prior art, when a relay device in a relay system switches or establishes a secondary link, the relay device receives downlink synchronization information and hop count information broadcast by other relay devices in the relay system, and then selects A suitable relay device is used for access. Because there may be multiple hops between the relay device and the end device, there may be multiple hops between the selected relay device and the base station, so the relay device is connected to the selected relay device for connection. After the entry, the total number of hops on the newly established communication path may be large, resulting in poor communication quality. Taking the relay system shown in FIG. 1 as an example, the node 2 selects the node 7 to access when switching or establishing the secondary link, thereby establishing a new communication path, that is, node 1 -> node 5 -> node 6 - > Node 7 -> Node 2 -> Node 3 -> Node 4, it can be seen that the total number of hops on the newly established communication path is 6 hops, and the number of hops is relatively large, so that the communication quality on the newly established communication path may be It will be worse.

Therefore, after accessing the first relay device, the second relay device may further send the first hop count to the first relay device. The first relay device receives the first hop count sent by the second relay device. The first relay device further receives a second hop count sent by the third relay device. When the sum of the first hop count and the second hop count is not greater than a preset hop count, the first relay device sends an access request to the third relay device. Therefore, after the first relay device accesses the third relay device, the total number of hops on the newly established communication link is too large, resulting in poor communication quality. The first hop count is a hop count between the second relay device and the end device. The end device is a last-level device that accesses the second relay device. The second hop count is a hop count between the third relay device and the base station. The third relay device may be any one of the relay systems already connected to the relay system, or a base station in the relay system. This scheme can be further used on the basis of the scheme shown in Figure 2, or it can be used as a stand-alone solution.

Taking the relay system shown in FIG. 1 as an example, the first relay device is node 2, the second relay device is node 3, the end device is node 4, and the third relay device is node 6, so the first hop The number is the number of hops between node 3 and node 4, that is, the first hop count is 1, and the second hop count is the number of hops between node 6 and node 1, that is, the second hop count is 2. Assuming that the preset hop count is 5, the sum of the first hop count and the second hop count is 3, which is smaller than the preset hop count, and therefore the node 2 sends an access request to the node 6.

When a relay device in a relay system switches or establishes a secondary link, two relay devices may initiate access to each other to generate an access conflict. Taking the relay system shown in FIG. 1 as an example, the random access procedure initiated by the node 3 to the node 2 is the same as the random access procedure initiated by the UE in the prior art. Since the UE does not have a fixed cell identifier, the UE carries the cell radio network temporary identifier (C-RNTI) allocated by the base station for the UE in the MSG-3 in the random access process, so the node 3 initiates a random randomization to the node 2 The C-RNTI of the node 3 carried in the MSG-3 of the access procedure, so that the node 2 records the C-RNTI of the node 3 when recording its own lower node. When the node 2 receives the downlink synchronization signal broadcasted by the node 3 when switching or establishing the secondary link, the node 2 cannot determine the node according to the cell identifier of the node 3 because the downlink synchronization signal carries the cell identifier of the node 3. 3 is its subordinate node, so node 2 may choose node 3 for access. Since the node 3 has already accessed the node 2, if the node 2 initiates an access request to the node 3, the two relay devices initiate an access to each other to generate an access conflict.

Therefore, the first relay device may further receive the second priority sent by the fourth relay device when switching or establishing the secondary link. The second priority is used to indicate a priority of the fourth relay device. The first relay device may send an access request to the fourth relay device when the second priority is greater than the first priority.

The fourth relay device may be any one of the relay systems that has been connected to the relay system, or a base station in the relay system. The fourth relay device and the third relay device may be the same relay device or different relay devices.

The priority of the parent node in the relay system is usually greater than the priority of the child node, so the priority of the first relay device (ie, the first priority) is greater than the priority of the second relay device. The first relay device sends an access request to the relay device with a higher priority than the first priority, so that the first relay device can be prevented from sending an access request to the second relay device, so that two relay devices can be avoided. Initiating access to each other leads to an access violation.

Further, in the embodiment of the present application, the problem that the two relay devices initiate the access to each other and the access conflict occurs when the relay node in the relay system in the prior art is switched or the secondary link is established, Three other relay system access methods are provided, and any one of the three methods may be used as a stand-alone solution or may be further used on the basis of the scheme shown in FIG. 2.

3 is a flowchart of a method for accessing a relay system provided by the present application, where the method includes:

S301. The first relay device broadcasts a parent node identifier of the first relay device. The parent node identifier of the first relay device is an identifier of the relay device accessed by the first relay device. Taking the relay system shown in FIG. 1 as an example, the first relay device is node 3, and the node 3 broadcasts the identifier of the node 2.

S302. The fifth relay device receives the parent node identifier broadcast by the first relay device. The fifth relay device may be a relay device that has accessed the relay system, or may be a base station in the relay system, or may be a relay device or a UE that is not connected to the relay system.

S303. When the parent node information of the first relay device is different from the identifier of the fifth relay device, the fifth relay device sends an access request to the first relay device.

The fifth relay device determines whether the first relay device has accessed the fifth relay device according to whether the parent node information of the first relay device is the same as the identifier of the fifth relay device. The fifth relay device sends an access request to the first relay device when the parent node information of the first relay device is different from the identifier of the fifth relay device, that is, the fifth relay device determines When the relay device is not its own child node, it sends an access request to the first relay device, so that the two relay devices can prevent each other from initiating access to each other and cause an access conflict.

FIG. 4 is a flowchart of another method for accessing a relay system provided by the present application, where the method includes:

S401. The first relay device receives a random access request sent by the second relay device.

S402. The first relay device sends a random access response message to the second relay device.

S403. The second relay device receives the random access response message sent by the first relay device, and sends a third message MSG-3 to the first relay device. MSG-3 is the third message in the random access process, because the content of the third message is not fixed during the random access process, and sometimes the radio network controller (RRC) connection request may be carried. Sometimes it may bring some control messages or even business data packets, so it is called MSG3 for short. The identity of the second relay device is carried in the MSG-3. The identity of the second relay device may be a unique identifier that identifies the second relay device, such as a physical cell identifier (PCI) of the second relay device or a number identifier of the relay node. . Meanwhile, since the UE does not have a fixed physical cell identifier, the identity of the second relay device may also implicitly indicate that the second relay device is a non-user device relay device (the relay device and the UE are in the access mode). The configuration information after the system is different. For example, after the relay device accesses the relay system, the upper node of the relay device needs to configure a synchronization signal for the relay device to make it a synchronization source, and the UE is accessing. After the relay system, the upper node of the UE does not need to configure a synchronization signal for the UE.

S404. The first relay device receives the MSG-3 sent by the second relay device and acquires the identity of the second relay device.

S405. The first relay device receives a downlink synchronization signal sent by the fifth relay device. The downlink synchronization signal carries an identity of the fifth relay device.

S406. The first relay device sends an access request to the fifth relay device when the identity of the fifth relay device is different from the identity of the second relay device.

The second relay device can carry the identity of the second relay device in the MSG-3, so that the first relay device can determine the identity of the child node of the second relay device (ie, the identity of the second relay device). Therefore, the first relay device can determine whether the fifth relay device is determined by whether the identity of the child node of the first relay device (ie, the identity of the second relay device) is the same as the identity of the fifth relay device. Has been connected to the first relay system. When the identity of the child node of the first relay device is different from the identity of the fifth relay device, the first relay device sends an access request to the fifth relay device, that is, the first relay device is When it is determined that the fifth relay device is not a child node of the self, the fifth relay device sends an access request to the fifth relay device, so that the two relay devices can be prevented from initiating access to each other to cause an access conflict.

Referring to FIG. 5, it is a flowchart of another method for accessing a relay system provided by the present application, where the method includes:

S501. The first relay device initiates an access request for requesting access to the fifth relay device to the base station. The access request carries the identity identifier of the first relay device and the identity identifier of the fifth relay device.

S502, the base station may determine, according to the access request and the historical response information or the current topology state of the relay system, whether a communication link is established between the first relay device and the fifth relay device; if yes, execute step S503; , step S504 is performed.

S503. The base station rejects the access request sent by the first relay device.

S504. The base station allows an access request sent by the first relay device.

When the base station establishes a communication link between the first relay device and the fifth relay device, the base station rejects the access request sent by the first relay device, thereby preventing the two relay devices from initiating access to each other and causing the access. conflict.

Optionally, after accessing the fifth relay device, the first relay device reports the access state information to the base station, where the access state information is used to indicate that the first relay device has accessed the fifth relay device. The base station thus updates the topology status and/or history response message of the relay system.

Based on the same inventive concept as the method embodiment, the embodiment of the present application provides a first relay device, which is specifically used to implement the method described in the embodiment of FIG. 2. The structure of the device is as shown in FIG. The broadcast transmitting module 601 and the receiving module 602. The broadcast sending module 601 is configured to broadcast the first priority. The first priority is used to indicate a priority of the first relay device, and the priority of the first relay device is determined according to at least one of the following parameters: the first relay device and the base station The number of hops, the device performance parameter of the first relay device, and the network performance parameter of the first relay device, where the first priority is the highest among the priorities received by the second relay device priority. And a receiving module, configured to receive an access request sent by the second relay device.

The device performance parameter of the first relay device may include, but is not limited to, at least one of the following: a load of the first relay device, and a number of communication paths between the first relay device and a base station. The network performance parameter of the first relay device may include, but is not limited to, at least one of the following: a channel remaining capacity of the first relay device, and a first N hop communication link between the first relay device and a base station Channel quality. The N is an integer greater than 0 and less than or equal to the number of hops between the first relay device and the base station.

In a specific implementation, the device may further include a scrambling module 603. The scrambling module 603 is configured to scramble the downlink broadcast signal by using the first priority as a scrambling parameter. The broadcast sending module 601 is specifically configured to broadcast the downlink broadcast signal scrambled by the scrambling module 603.

In another specific implementation manner, the broadcast sending module 601 is specifically configured to broadcast a downlink synchronization signal corresponding to the first priority.

The device may further include a determining module 604, configured to determine the first priority by: determining a target index of the first relay device, and according to the first relay device The target index determines the first priority. The target index of the first relay device conforms to the following formula:

P=α*N _hop +δ*W _load +β*N _connection +σ*C _remain +ε*Q;

Optionally, the receiving module 602 is further configured to: after receiving the access request sent by the second relay device, receive the first hop count sent by the second relay device. The first hop count is a hop count between the second relay device and the end device; the end device is a last-level device that accesses the second relay device. And receiving the second hop count sent by the third relay device. The second hop count is a hop count between the third relay device and the base station. The broadcast sending module 601 is further configured to: when the sum of the first hop count received by the receiving module 602 and the second hop count received by the receiving module 602 is not greater than a preset hop count, The third relay device sends an access request.

The receiving module 602 is further configured to receive a second priority sent by the fourth relay device. The second priority is used to indicate a priority of the fourth relay device. The broadcast sending module 601 is further configured to: when the second priority received by the receiving module 602 is greater than the first priority, send an access request to the fourth relay device.

Based on the same inventive concept as the method embodiment, the embodiment of the present application provides a first relay device, which is specifically used to implement the method described in the embodiment of FIG. 3. The structure of the device is as shown in FIG. The broadcast transmitting module 701 and the receiving module 702. The broadcast sending module 701 is configured to broadcast the parent node identifier of the first relay device. The parent node identifier of the first relay device is an identifier of the relay device accessed by the first relay device. The receiving module 702 is configured to receive an access request sent by the fifth relay device. The access request is sent by the fifth relay device when the parent node information of the first relay device is different from the identifier of the fifth relay device.

Based on the same inventive concept as the method embodiment, the embodiment of the present application provides a first relay device, which is specifically used to implement the method described in the embodiment of FIG. 4, and the structure of the device is as shown in FIG. The receiving module 801 and the transmitting module 802. The receiving module 801 is configured to receive a random access request sent by the second relay device. The sending module 802 is configured to send a random access response message to the second relay device. The receiving module 801 is further configured to receive the third message MSG-3 sent by the second relay device. The identity of the second relay device is carried in the MSG-3.

Optionally, the receiving module is further configured to receive an access request sent by the fifth relay device. The sending module is further configured to send an access request to the fifth relay device when the identity of the fifth relay device is different from the identity of the second relay device.

The division of the modules in the embodiment of the present application is schematic, and is only a logical function division. In actual implementation, there may be another division manner. In addition, each functional module in each embodiment of the present application may be integrated into one processing. In the device, it can also be physically existed alone, or two or more modules can be integrated into one module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules.

Wherein, when the integrated module can be implemented in the form of hardware, as shown in FIG. 9, the first relay device may include the processor 902. The hardware of the entity corresponding to the above module may be the processor 902. The processor 902 can be a central processing unit (CPU), or a digital processing module or the like. The first relay device may further include a communication interface 901, and the processor 902 performs data transmission and reception with other relay devices through the communication interface 901. The apparatus also includes a memory 903 for storing programs executed by the processor 902. The memory 903 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), or a volatile memory such as a random access memory (random). -access memory, RAM). Memory 903 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.

The processor 902 is configured to execute the program code stored in the memory 903, specifically for performing any of the methods described in the embodiments shown in FIG. 2 to FIG. For the method described in the embodiment shown in FIG. 2 to FIG. 5, the application is not described herein again.

The specific connection medium between the communication interface 901, the processor 902, and the memory 903 is not limited in the embodiment of the present application. In the embodiment of the present application, the memory 903, the processor 902, and the communication interface 901 are connected by a bus 904 in FIG. 9. The bus is indicated by a thick line in FIG. 9, and the connection manner between other components is only schematically illustrated. , not limited to. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 9, but it does not mean that there is only one bus or one type of bus.

The embodiment of the present invention further provides a chip, where the chip includes the foregoing communication interface and the processor, and is configured to support the first relay device to implement any one of the methods described in the embodiments shown in FIG. 2 to FIG. .

The embodiment of the present application further provides a computer readable storage medium for storing computer software instructions required to execute the foregoing processor, which includes a program for executing the above-mentioned processor.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

It will be apparent to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit and scope of the application. Thus, it is intended that the present invention cover the modifications and variations of the present invention.

Claims

A method for accessing a relay system, the method comprising:

The first relay device broadcasts a first priority; the first priority is used to indicate a priority of the first relay device, and the priority of the first relay device is determined according to at least one of the following parameters: The hop count between the first relay device and the base station, the device performance parameter of the first relay device, and the network performance parameter of the first relay device, where the first priority is the second The highest priority among the priorities received by the relay device;

The first relay device receives an access request sent by the second relay device.
The method of claim 1, wherein the first relay device broadcasts the first priority, comprising:

The first relay device scrambles the downlink broadcast signal with the first priority as a scrambling parameter, and broadcasts the scrambled downlink broadcast signal; or

The first relay device broadcasts a downlink synchronization signal corresponding to the first priority.
The method according to claim 1 or 2, wherein the device performance parameter of the first relay device comprises at least one of the following: a load of the first relay device, the first relay device and The number of communication paths between base stations;

The network performance parameter of the first relay device includes at least one of: a channel remaining capacity of the first relay device, and a channel quality of a first N hop communication link between the first relay device and a base station; The N is an integer greater than 0 and less than or equal to the number of hops between the first relay device and the base station.
The method of claim 3, wherein the determining, by the first relay device, the first priority comprises:

The first relay device determines a target index of the first relay device, and the target index of the first relay device conforms to the following formula:

P=α*N hop +δ*W load +β*N connection +σ*C remain +ε*Q;

Wherein, P represents a target index of the first relay device, N hop represents a hop count between the first relay device and a base station, W load represents a load of the first relay device, and N connection represents a The number of communication paths between the first relay device and the base station, C remain represents the channel remaining capacity of the first relay device, and Q represents the first N hop communication link between the first relay device and the base station. Channel quality, α, δ, β, σ, ε represent weights;

The first relay device determines the first priority according to a target index of the first relay device.
The method according to any one of claims 1 to 4, wherein after the first relay device receives an access request sent by the second relay device, the method includes:

Receiving, by the first relay device, a first hop count sent by the second relay device; the first hop count is a hop count between the second relay device and the end device; Accessing the last level device of the second relay device;

The first relay device receives a second hop count sent by the third relay device; the second hop count is a hop count between the third relay device and the base station;

When the sum of the first hop count and the second hop count is not greater than a preset hop count, the first relay device sends an access request to the third relay device.
The method of any of claims 1-5, wherein the method further comprises:

Receiving, by the first relay device, a second priority sent by the fourth relay device; the second priority is used to indicate a priority of the fourth relay device;

The first relay device sends an access request to the fourth relay device when the second priority is greater than the first priority.
A first relay device, comprising:

a broadcast sending module, configured to broadcast a first priority; the first priority is used to indicate a priority of the first relay device, and the priority of the first relay device is based on at least one of the following parameters Determining: a hop count between the first relay device and the base station, a device performance parameter of the first relay device, and a network performance parameter of the first relay device, where the first priority is The highest priority among the priorities received by the two relay devices;

And a receiving module, configured to receive an access request sent by the second relay device.
The first relay device according to claim 7, wherein the first relay device further comprises a scrambling module;

The scrambling module is configured to scramble the downlink broadcast signal by using the first priority as a scrambling parameter;

The broadcast sending module is specifically configured to: broadcast the downlink broadcast signal scrambled by the scrambling module.
The first relay device according to claim 7, wherein the broadcast sending module is specifically configured to: broadcast a downlink synchronization signal corresponding to the first priority.
The first relay device according to claim 7, wherein the device performance parameter of the first relay device comprises at least one of the following: a load of the first relay device, the first relay The number of communication paths between the device and the base station;

The network performance parameter of the first relay device includes at least one of: a channel remaining capacity of the first relay device, and a channel quality of a first N hop communication link between the first relay device and a base station; The N is an integer greater than 0 and less than or equal to the number of hops between the first relay device and the base station.
The first relay device according to claim 10, wherein the first relay device further comprises a determining module, and the determining module is configured to determine the first priority by:

Determining a target index of the first relay device, and the target index of the first relay device conforms to the following formula:

P=α*N hop +δ*W load +β*N connection +σ*C remain +ε*Q;

Wherein, P represents a target index of the first relay device, N hop represents a hop count between the first relay device and a base station, W load represents a load of the first relay device, and N connection represents a The number of communication paths between the first relay device and the base station, C remain represents the channel remaining capacity of the first relay device, and Q represents the first N hop communication link between the first relay device and the base station. Channel quality, α, δ, β, σ, ε represent weights;

Determining the first priority according to a target index of the first relay device.
The first relay device according to any one of claims 7 to 11, wherein the receiving module is further configured to receive the second middle after receiving an access request sent by the second relay device. a first hop count sent by the device; the first hop count is a hop count between the second relay device and the end device; and the end device is a last level of accessing the second relay device And receiving a second hop sent by the third relay device; the second hop count is a hop count between the third relay device and the base station;

The broadcast sending module is further configured to: when the sum of the first hop count received by the receiving module and the second hop count received by the receiving module is not greater than a preset hop count, to the third The relay device sends an access request.
The first relay device according to any one of claims 7 to 12, wherein the receiving module is further configured to receive a second priority sent by the fourth relay device; Instructing the priority of the fourth relay device;

The broadcast sending module is further configured to send an access request to the fourth relay device when the second priority received by the receiving module is greater than the first priority.
A chip, characterized in that the chip comprises a communication interface, comprising:

The communication interface is configured to broadcast a first priority; the first priority is used to indicate a priority of the first relay device, and the priority of the first relay device is based on at least one of the following parameters Determining: a hop count between the first relay device and the base station, a device performance parameter of the first relay device, and a network performance parameter of the first relay device, where the first priority is The highest priority among the priorities received by the second relay device; receiving the access request sent by the second relay device.
The chip according to claim 14, wherein the chip further comprises a processor; the processor, configured to scramble the downlink broadcast signal by using the first priority as a scrambling parameter;

When the communication interface broadcasts the first priority, the communication interface is specifically configured to: broadcast the scrambled downlink broadcast signal.
The chip according to claim 14, wherein the communication interface is configured to: broadcast a downlink synchronization signal corresponding to the first priority when broadcasting the first priority.
The chip according to claim 14, wherein the device performance parameter of the first relay device comprises at least one of the following: a load of the first relay device, a first relay device, and a base station The number of communication paths;

The network performance parameter of the first relay device includes at least one of: a channel remaining capacity of the first relay device, and a channel quality of a first N hop communication link between the first relay device and a base station; The N is an integer greater than 0 and less than or equal to the number of hops between the first relay device and the base station.
The chip according to claim 17, wherein the chip further comprises a processor; and the processor is configured to determine the first priority by:

Determining a target index of the first relay device, and the target index of the first relay device conforms to the following formula:

P=α*N hop +δ*W load +β*N connection +σ*C remain +ε*Q;

Wherein, P represents a target index of the first relay device, N hop represents a hop count between the first relay device and a base station, W load represents a load of the first relay device, and N connection represents a The number of communication paths between the first relay device and the base station, C remain represents the channel remaining capacity of the first relay device, and Q represents the first N hop communication link between the first relay device and the base station. Channel quality, α, δ, β, σ, ε represent weights;

Determining the first priority according to a target index of the first relay device.
The chip according to any one of claims 14 to 18, wherein the communication interface is further configured to receive the second transmission by the second relay device after receiving the access request sent by the second relay device a hop count; the first hop count is a hop count between the second relay device and the end device; the end device is a last-level device accessing the second relay device; and receiving a third a second hop count sent by the relay device; the second hop count is a hop count between the third relay device and the base station; and a sum of the first hop count and the second hop count is not greater than When the hop count is preset, an access request is sent to the third relay device.
The chip according to any one of claims 14 to 19, wherein the communication interface is further configured to receive a second priority sent by the fourth relay device; the second priority is used to indicate the a priority of the fourth relay device; when the second priority is greater than the first priority, sending an access request to the fourth relay device.
A method for accessing a relay system, the method comprising:

Receiving, by the first relay device, a random access request sent by the second relay device;

The first relay device sends a random access response message to the second relay device;

The first relay device receives the third message MSG-3 sent by the second relay device, and the MSG-3 carries the identity identifier of the second relay device.
The method of claim 21, wherein the method further comprises:

The first relay device receives a downlink synchronization signal sent by the third relay device, where the downlink synchronization signal carries an identity identifier of the third relay device;

The first relay device sends an access request to the third relay device when the identity identifier of the third relay device is different from the identity identifier of the second relay device.
A method for accessing a relay system, the method comprising:

The first relay device broadcasts the parent node identifier of the first relay device, where the parent node identifier of the first relay device is an identifier of the relay device accessed by the first relay device.
The method of claim 23, wherein the method further comprises:

Receiving, by the first relay device, an access request sent by the second relay device, where the access request is a parent node identifier of the second relay device in the first relay device, and the The two relay devices are sent when the identifiers are different.
A first relay device, comprising:

a receiving module, configured to receive a random access request sent by the second relay device;

a sending module, configured to send a random access response message to the second relay device;

The receiving module is further configured to receive a third message MSG-3 sent by the second relay device, where the MSG-3 carries an identity identifier of the second relay device.
The first relay device according to claim 25, wherein the receiving module is further configured to receive a downlink synchronization signal sent by the third relay device;

The sending module is further configured to send an access request to the third relay device when the identity of the third relay device is different from the identity of the second relay device.
A first relay device, comprising:

The broadcast sending module is configured to broadcast the parent node identifier of the first relay device, where the parent node identifier of the first relay device is an identifier of the relay device accessed by the first relay device.
The first relay device according to claim 27, further comprising a receiving module;

The receiving module is configured to receive an access request sent by the second relay device, where the access request is a parent node information of the second relay device in the first relay device, and the The two relay devices are sent when the identifiers are different.
A chip, characterized in that the chip comprises a communication interface for performing the relay system access method according to claim 21 or 22, or the communication interface is for performing claim 23 or The relay system access method of 24 described.
A first relay device, comprising: a transceiver, a memory, and a processor, wherein the memory is used to store program code that is required to be executed by the processor;

The transceiver is configured to perform data transmission and reception between the first relay device and other relay devices;

The processor is configured to execute the program code stored in the memory, specifically for performing the relay system access method according to any one of claims 1 to 6, or specifically for performing the method according to claim 21 or 22 Following the system access method, or specifically for performing the relay system access method according to claim 23 or 24.
A computer readable storage medium, wherein the computer readable storage medium stores a program that, when read and executed by one or more processors, implements claims 1 to 6 and 21 to 24 A relay system access method as claimed in any of the preceding claims.
A computer program product comprising instructions, wherein when executed on a computer, causes the computer to perform the relay system access method of any one of claims 1 to 6 and 21 to 24.