TW202005321A - Method for transmitting signal, relay devices and network devices - Google Patents

Abstract

Method for transmitting signal, relay devices and network devices thereof are provided. The method comprises obtaining a first information by a first relay device. The first information is used to indicate transmission resources of a first signal. Sending the first signal by the first relay device according to the first information. This application is conducive to improving the performance of signal transmission.

Description

Signal transmission method, relay equipment and network equipment

Embodiments of the present application relate to the field of communications, and more specifically, to a signal transmission method, relay equipment, and network equipment.

In the Long Term Evolution (LTE) system, the backhaul link (Backhaul) between the base station and the base station and the core network uses a wired connection, which brings greater deployment difficulty and In order to solve the above problems, the 3rd Generation Partnership Project (3GPP) launched a research on wireless relay technology in the LTE-A standardization stage to provide a wireless backhaul link solution. Program.

In the relay system, the relay node is a child node of the parent node, so the relay node needs to receive the signal sent by the parent node; at the same time, the relay node is the parent node of its child node, so it needs to send a signal to the child node .

How to coordinate the transmission resources of the above signals in the relay system is a problem that needs to be solved.

In view of this, the embodiments of the present application provide a signal transmission method, a relay device, and a network device, which are beneficial to improve the performance of signal transmission.

In a first aspect, a method for transmitting a signal is provided. The method is applied to a relay system. The method includes: a first relay device obtains a first message, and the first message is used to indicate a transmission resource of the first signal; The first relay device sends the first signal according to the first message.

In a possible implementation manner, the relay system includes multiple levels, and the first message is used to indicate a corresponding relationship between each level of the multiple levels and the transmission resource of the first signal, or, the first The message is used to indicate the transmission resource of the first signal allocated to the first relay device; the first relay device sends the first signal according to the first message, including: the first relay device according to the first A message, sending the first signal on the transmission resource of the first signal corresponding to the level of the first relay device in the relay system, or the first relay device according to the first message The first signal is sent on the transmission resource of the first signal allocated by the first relay device.

In a possible implementation manner, the first relay device acquiring the first message includes: the first relay device receives the first message sent by the second relay device or the network device, and the second relay device It is the parent node of the first relay device, or the first message is pre-stored in the first relay device.

In a possible implementation manner, the method further includes: the first relay device determining the second relay device.

In a possible implementation manner, the method further includes: the first relay device determining the hierarchy of the second relay device in the relay system; the first relay device where the second relay device is located The next level of the level is determined as the level of the first relay device in the relay system.

In a possible implementation, the first relay device determining the hierarchy of the second relay device in the relay system includes: the first relay device according to the first message and the second relay device The transmission resource of the transmitted first signal determines the level of the second relay device in the relay system.

In a possible implementation manner, the first signal is a synchronization signal, and the first relay device determining the level of the second relay device in the relay system includes: the first relay device according to the synchronization sequence and The correspondence between each level in the relay system and the synchronization sequence corresponding to the synchronization signal sent by the second relay device determine the level of the second relay device in the relay system.

In a possible implementation, the first relay device determining the second relay device includes: the first relay device receives at least one first signal, and the at least one first signal is relayed by at least one Sent by the device; the first relay device determines the second relay device according to the at least one first signal.

In a possible implementation manner, the at least one first signal includes K first signals, K is a positive integer greater than or equal to 1, and the first relay device determines the second relay according to the at least one first signal The device includes: the first relay device measures the strength of the K first signals; the first relay device determines the second relay device according to the strength of the K first signals.

In a possible implementation manner, the at least one first signal includes K first signals, K is a positive integer greater than or equal to 1, and the first relay device determines the second relay according to the at least one first signal The device includes: the first relay device determines, according to the K first signals, at least one level where the relay device that sends the K first signals is located; the first relay device according to the size of the at least one level, Determine the second relay device.

In a possible implementation manner, the at least one first signal includes K first signals, K is a positive integer greater than or equal to 1, and the first relay device determines the second relay according to the at least one first signal The device includes: the first relay device determines at least one level where the relay device that sends the K first signals is located based on the K first signals; the first relay device determines the first level from the at least one level One level; if the J relay devices of the first level send M first signals of the K first signals, the first relay device measures the strength of the M first signals, M is less than or A positive integer equal to K, and J is a positive integer less than or equal to M; the first relay device determines the second relay device according to the strength of the M first signals.

In a possible implementation manner, the first signal is a synchronization signal, and the first relay device sends the first signal according to the first message, including: the first relay device according to the first message and the synchronization sequence Corresponding to each level of the relay system, the synchronization sequence corresponding to the level where the first relay device is located is sent.

In a possible implementation manner, the first message is used to indicate the transmission resource of the first signal allocated to the first relay device, and the method further includes: the first relay device receives the second relay device A second message sent to indicate the transmission resource of the first signal in at least one level above the level where the first relay device is located, the second relay device being the first relay device The parent node.

In a possible implementation, the first message is carried in a broadcast message, a radio resource control RRC signal, or a downlink control message DCI.

In a possible implementation manner, the first signal is a synchronization signal, a tracking reference signal TRS, or a channel status information-reference signal CSI-RS.

In a second aspect, a method for transmitting a signal is provided. The method is applied to a relay system. The method includes: a second relay device sends a first message to a first relay device, and the first message is used to indicate a first Signal transmission resources.

In a possible implementation manner, the second relay device is a parent node of the first relay device.

In a possible implementation, the relay system includes multiple levels, and the first message is used to indicate transmission resources of the first signal corresponding to each level of the multiple levels, or the first message is used Indicates the transmission resource of the first signal allocated to the first relay device.

In a possible implementation manner, the first message is used to indicate the transmission resource of the first signal allocated to the first relay device, and the method further includes: the second relay device sends a message to the first relay device Sending a second message, the second message used to indicate the transmission resource of the first signal in at least one level above the level where the first relay device is located.

In a possible implementation, the second relay device sends the first message to the first relay device, including: the second relay device sends the first message to the first relay device through a broadcast message, a radio resource control RRC signal, or a downlink control message DCI A relay device sends the first message.

In a possible implementation manner, the first signal is a synchronization signal, a tracking reference signal TRS, or a channel status information-reference signal CSI-RS.

In a third aspect, a method for transmitting a signal is provided. The method is applied to a relay system. The method includes: a network device sends a first message to a first relay device, and the first message is used to indicate the first message It is used to indicate the transmission resource of the first signal.

In a possible implementation, the relay system includes multiple levels, and the first message is used to indicate transmission resources of the first signal corresponding to each level of the multiple levels, or the first message is used Indicates the transmission resource of the first signal allocated to the first relay device.

In a possible implementation, the network device sends the first message to the first relay device, including: the network device sends the first relay device a broadcast message, a radio resource control RRC signal, or a downlink control message DCI Send the first message.

In a possible implementation manner, the first signal is a synchronization signal, a tracking reference signal TRS, or a channel status information-reference signal CSI-RS.

In a fourth aspect, a relay device is provided for performing the method in the first aspect or any possible implementation manner of the first aspect. Specifically, the relay device includes a unit for performing the method in the first aspect or any possible implementation manner of the first aspect.

In a fifth aspect, a relay device is provided for performing the method in the second aspect or any possible implementation manner of the second aspect. Specifically, the relay device includes a unit for performing the method in the second aspect or any possible implementation manner of the second aspect.

According to a sixth aspect, a network device is provided for performing the method in the third aspect or any possible implementation manner of the third aspect. Specifically, the network device includes a unit for performing the method in the third aspect or any possible implementation manner of the third aspect.

According to a seventh aspect, a relay device is provided. The relay device includes: a memory, a processor, an input interface, and an output interface. Among them, the memory, processor, input interface and output interface are connected through the bus system. The memory is used to store instructions, and the processor is used to execute the instructions stored in the memory to perform the method in the first aspect or any possible implementation manner of the first aspect.

According to an eighth aspect, a relay device is provided. The relay device includes: a memory, a processor, an input interface, and an output interface. Among them, the memory, processor, input interface and output interface are connected through the bus system. The memory is used to store instructions, and the processor is used to execute the instructions stored in the memory, to perform the method in the second aspect or any possible implementation manner of the second aspect.

According to a ninth aspect, a network device is provided. The network device includes: a memory, a processor, an input interface, and an output interface. Among them, the memory, processor, input interface and output interface are connected through the bus system. The memory is used to store instructions, and the processor is used to execute the instructions stored in the memory to perform the method in the third aspect or any possible implementation manner of the third aspect.

According to a tenth aspect, a wafer is provided for implementing the method in the first aspect or any possible implementation manner of the first aspect, or the method in the second aspect or any possible implementation manner of the second aspect, or The method in the above third aspect or any possible implementation manner of the third aspect.

Specifically, the chip includes: a processor for calling and running a computer program from the memory, so that the device installed with the chip executes the method in the first aspect or any possible implementation manner of the first aspect, or The method in the foregoing second aspect or any possible implementation manner of the second aspect, or the foregoing third aspect or any possible implementation manner of the third aspect.

According to an eleventh aspect, a computer storage medium is provided for storing the method in the first aspect or any possible implementation manner of the first aspect, or the second aspect or any possible implementation manner of the second aspect In the third aspect or any possible implementation manner of the third aspect. The computer software instructions used include programs designed to execute the above aspects.

According to a twelfth aspect, there is provided a computer program product including instructions that when run on a computer, causes the computer to perform the method in the first aspect or any optional implementation manner of the first aspect, or the second The method in any optional implementation manner of the aspect or the second aspect, or the method in the above third aspect or any possible implementation manner of the third aspect.

In a thirteenth aspect, a communication system is provided, including a first relay device and a second relay device; wherein,

The first relay device is used to obtain a first message, the first message is used to indicate a transmission resource of the first signal, and the first signal is sent according to the first message;

The network device is used to send a first message to the first relay device, and the first message is used to indicate the transmission resource of the first signal.

Specifically, the first relay device is used to perform the method in each implementation manner of the above-mentioned first aspect, and the second relay device is used to perform the method in each implementation manner of the above-mentioned second aspect.

In the fourteenth aspect, a communication system is provided, including a first relay device and a network device;

The first relay device is used to obtain a first message, the first message is used to indicate a transmission resource of the first signal, and the first signal is sent according to the first message;

The network device is used to send a first message to the first relay device, and the first message is used to indicate the transmission resource of the first signal.

Specifically, the first relay device is used to perform the method in each implementation manner of the first aspect described above, and the network device is used to perform the method in each implementation manner of the third aspect described above.

These or other aspects of the present application will be more concise and understandable in the description of the following embodiments.

The technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application.

It should be understood that the technical solutions of the embodiments of the present application may be applied to various communication systems, for example, a long-term evolution LTE system, an LTE frequency division duplex (FDD) system, and an LTE time division duplex (TDD) , Universal Mobile Telecommunication System (UMTS), New Radio (NR) or future 5G system evolution, etc.

The terminal equipment in the embodiments of the present application may refer to user equipment (User Equipment, UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless Communication equipment, user agents or user devices. The access terminal can be a mobile phone, a wireless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a personal digital processing (Personal Digital Assistant, PDA), or a wireless communication function Handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network or public land mobile network (PLMN) that will evolve in the future The terminal devices in the application are not limited in the embodiments of the present application.

The network device in the embodiment of the present application may be a device for communicating with a terminal device. The network device may be a node (NodeB, NB) in a WCDMA system, or an evolutionary node (Evolutional NodeB in an LTE system , ENB or eNodeB), can also be a wireless controller in the cloud radio access network (Cloud Radio Access Network, CRAN) scenario, or the network device can be a relay station, access point, vehicle equipment, wearable devices As well as network equipment in the future 5G network or network equipment in the future evolved PLMN network, etc., the embodiments of the present application are not limited.

In the LTE system, the backhaul link between the base station and the base station and the core network uses a wired connection, which brings greater deployment difficulty and higher network deployment costs to the operator. In order to solve the above problems In the LTE-A standardization phase, 3GPP initiated research on wireless relay technology to provide wireless backhaul link solutions.

In a relay system, a relay node (Relay Node, RN) is wirelessly connected to its home eNB area, and the home eNB of the relay node is called an anchor base station (Donor eNB, DeNB). The network architecture of the relay system may be as shown in FIG. 1. The network architecture 100 may include an anchor node 110, that is, a DeNB. The anchor node 110 may be an access network node or a core. Network node. The network architecture 100 may also include at least one relay device 120 and terminal device 130. Among them, the network architecture mainly includes three wireless links: the backhaul link between the RN and the DeNB (Backhaul link), the access link between the UE and the RN (Access link), and the direct link between the UE and the eNB Direct link.

In the relay system, the upper-level node of a node is also called the parent node, and the lower-level node is also called the child node. As shown in FIG. 1, for RN1, DeNB is a parent node, RN2 is a child node, for RN2, RN1 is a parent node, and UE is a child node.

It should be understood that the embodiments of the present application are not limited to the relay extension between the network nodes shown in FIG. 1, but can also be applied to the relay extension between terminal devices, for example, there may be one Or multiple relay nodes.

FIG. 2 shows a schematic block diagram of a signal transmission method 200 according to an embodiment of the present application. The method 200 is applied to a relay system. As shown in FIG. 2, the first relay device may be the relay node 120 described in FIG. 1. The method 200 includes some or all of the following:

S210. The first relay device obtains a first message, and the first message is used to indicate a transmission resource of the first signal;

S220, the first relay device sends the first signal according to the first message.

The first thing to note is that the first signal can be any one of a synchronization signal, a channel state information reference signal (CSI-RS) or a tracking reference signal (TRS), the first The signal can also be a broadcast signal, data or control signal. It should be understood that the following embodiments are described by taking the first signal as a synchronization signal as an example, but the embodiments of the present application are not limited thereto. The relay system of the embodiment of the present application may support multi-hop, or support multiple levels.

In the LTE and NR systems, the terminal or other equipment obtains the time-frequency synchronization of the network by searching the synchronization signal of the system, and accesses the system. In the relay system, the relay device is a child node of the parent node, so it needs to search the synchronization signal of the parent node to access the parent node system; at the same time, the relay device is the parent node of its child node, so it needs to send Synchronize the signal to enable the child nodes to access the relay system. In addition, for multi-hop relay systems, low-level nodes can access the upper-level relay system or higher-level relay systems. Taking FIG. 3 as an example, the relay system includes four levels, level 1 is the DeNB, and levels 2, 3, and 4 are the relay devices. RN3 can access the upper level relay device RN1 or RN2, and can also store Get a higher-level node, such as a base station. Similarly, RN4 can access the upper-level RN3 or higher-level RN2. In FIG. 3, the solid line indicates a direct link, and the dotted line indicates an alternative link. Due to the limitation of half-duplex, the relay device cannot simultaneously send the synchronization signal when receiving the synchronization signal of the upper level. Then, how to obtain synchronization resources for the relay device to send synchronization signals to the child nodes is a problem to be solved. Specifically, in the embodiment of the present application, the first relay device may obtain the first message, and the first message may be used to indicate synchronization resources, then the first relay device may naturally obtain the synchronization signal according to the first message The transmitted resources, in turn, can send synchronization signals. For example, the network or system may pre-configure the number of levels of the relay system in advance (the relay system may include multiple levels), or it may pre-configure the synchronization resources corresponding to each level in advance, that is, the first message is used To indicate the synchronization resources corresponding to each level in the relay system. Then, once the first relay device obtains the first message and determines the level of the relay device in the relay system, the first relay device can determine the synchronization resource corresponding to the first relay device . For another example, the network or system may not pre-configure the corresponding relationship between each level in the relay system and the synchronization resource, and the relay device or network device at the upper level may dynamically allocate the synchronization resource to the relay device at the lower level , And then the synchronization signal can be sent according to the allocated synchronization resources.

Therefore, the signal transmission method according to the embodiments of the present application is beneficial to improve the performance of signal transmission.

Optionally, in the embodiment of the present application, the relay system includes multiple levels, and the first message is used to indicate a correspondence between each level of the multiple levels and the transmission resource of the first signal, or, The first message is used to indicate the transmission resource of the first signal allocated to the first relay device; the first relay device sends the first signal according to the first message, including: the first relay device According to the first message, send the first signal on the transmission resource of the first signal corresponding to the level of the first relay device in the relay system, or the first relay device according to the first message , Sending the first signal on the transmission resource of the first signal allocated to the first relay device.

Specifically, the first message may be pre-configured by the network or system to the first relay device, for example, it may be a broadcast message, a Radio Resource Control (RRC) signal, or a Downlink Control Information , DCI) is sent to the first relay device, or may be pre-stored in the first relay device. Once the first relay device knows the level in the relay system, it can obtain the synchronization resource corresponding to the level of the first relay device by looking up the corresponding relationship between the level indicated by the first message and the synchronization resource, That is, the first relay device may send a synchronization signal on the synchronization resource corresponding to the level where the first relay device is located. Or, after acquiring the synchronization resource allocated to it according to the first message, the first relay device may send a synchronization signal on the synchronization resource.

Optionally, the first message may be sent to the first relay device by a second relay device or a network device, and the second relay device is a parent node of the first relay device.

Further, the first relay device needs to determine the second relay device.

Optionally, the first relay device determining the second relay device includes: the first relay device receives at least one of the first signals, and the at least one first signal is generated by at least one The first relay device determines the second relay device based on the at least one first signal. Specifically, the first relay device may determine the second relay device in the following manner.

Embodiment 1: The at least one first signal includes K first signals, K is a positive integer greater than or equal to 1, and the first relay device determines the second relay device according to the at least one first signal, including: If K is equal to 1, that is, the first relay device receives a first signal, the first relay device uses the device that sent the first signal as the second relay device, that is, the first relay device The parent node. If K is greater than 1, the first relay device measures the strength of the K first signals; the first relay device determines the second relay device according to the strength of the K first signals. Specifically, the first relay device may determine the node corresponding to the first signal with the highest strength among the K first signals as the second relay device, and the second relay device may also determine the strength among the K first signals The node corresponding to the second highest first signal is determined to be the second relay device. The first relay device may also determine the second relay device by combining other parameters with the strength of the K first signals. The embodiments of the present application do not limit this.

Embodiment 2: The at least one first signal includes K first signals, K is a positive integer greater than or equal to 1, and the first relay device determines the second relay device according to the at least one first signal, including: The first relay device determines at least one level where the relay device that sends the K first signals is based on the K first signals; the first relay device determines the second level according to the size of the at least one level Relay equipment. Specifically, the first terminal device may determine the level of the node that sends the K first signals according to the correspondence between the transmission resources of the K first signals and the first message, that is, the transmission resources and the levels, and send the K The level of the node of the first signal may include multiple levels, then the first relay device may select a node of one level from the multiple levels as the parent node. For example, the node with the highest or lowest level may be selected as the parent node, and the embodiments of the present application are not limited thereto.

Embodiment 3: The at least one first signal includes K first signals, K is a positive integer greater than or equal to 1, and the first relay device determines the second relay device according to the at least one first signal, including: Based on the K first signals, the first relay device determines at least one level where the relay device that sends the K first signals is located; the first relay device determines the first level from the at least one level; if The J relay devices of the first level send M first signals of the K first signals, and the first relay device measures the strength of the M first signals, where M is a positive value less than or equal to K Integer, J is a positive integer less than or equal to M; the first relay device determines the second relay device according to the strength of the M first signals. Specifically, if a certain level selected by the first relay device according to at least one level where the relay device sending the K first signals is located may include multiple nodes, the first relay device may also combine the multiple The strength of the first signal sent by each node is further selected. For example, the node corresponding to the first signal with the highest strength among the first signals sent by the multiple nodes may be used as the parent node. In this embodiment of the present application, at least one level where the relay device that sends the K first signals is located according to the K first signals may be as shown in Embodiment 1 and Embodiment 2. For brevity, details are not described herein again.

Embodiment 4: The at least one first signal includes K first signals, K is a positive integer greater than or equal to 1, and the first relay device determines the second relay device according to the at least one first signal, including: Based on the K first signals, the first relay device determines at least one level where the relay device that sends the K first signals is located; the first relay device determines the first level from the at least one level; if The J relay devices of the first level send M first signals of the K first signals, and the first relay device measures the strength of the M first signals, where M is a positive value less than or equal to K Integer, J is a positive integer less than or equal to M; the first relay device determines the second relay device according to the strength of the M first signals. Specifically, the first terminal device may also determine the hierarchy of the node that sends the K synchronization signals according to the synchronization sequence corresponding to the K synchronization signals and the correspondence between the synchronization sequence and the hierarchy, and send the K synchronization signals. The level where the node is located may include multiple levels, then the first relay device may select one level from the multiple levels as the first level, for example, the highest or lowest level may be selected as the first level. Further, if a relay device is included in the first level, then the relay device is selected as the parent node of the first relay device, that is, the second relay device, if there are multiple relay devices in the first level The relay device may measure the strength of the first signal of the plurality of relay devices, and select the relay device with the largest signal strength as the parent node of the first relay device, that is, the second relay device. In this embodiment, different levels may correspond to different synchronization sequences. In the same level, different relay devices may also correspond to different synchronization sequences, which is not limited in this embodiment of the present application.

It should be noted that different synchronization sequences can be used not only to distinguish different levels in the relay system, but also to distinguish different relay devices on the same level.

Optionally, if the first message is used to indicate the correspondence between each of the multiple levels and the transmission resource of the first signal, the method further includes: the first relay device may determine the first relay device Hierarchy in the relay system. Specifically, the first relay device may determine the level of the first relay device in the relay system in the following manner.

Embodiment 5: The first relay device determines the level of the second relay device in the relay system according to the transmission resources of the first message and the first signal sent by the second relay device, the second The relay device is the parent node of the first relay device; the first relay device determines the next level of the level where the second relay device is located as the level of the first relay device in the relay system .

The first relay device can access the system by searching for the synchronization signal. And determine the level of the first relay device in the relay system by the level of the relay device that sends the searched synchronization signal in the relay system. For example, if the first relay device searches for a synchronization signal and accesses the network of the relay device that sends the synchronization signal, the relay device that sends the synchronization signal is the first relay device’s Parent node. The first relay device may first determine the level of the parent node of the first relay device in the relay system according to the corresponding relationship indicated by the first message and the transmission resource of the synchronization signal, and the first relay device determines After the level where the parent node is located, the next level can be used as the level of the first relay device. For example, the maximum level supported by the relay system is N, corresponding to levels 0, 1, 2, ... N-1, where level 0 represents the highest level, N is a positive integer greater than or equal to 1, and the level of the parent node is F, F is an integer less than or equal to N-1, the level of the first relay device is (F+1), and if the level of the parent node is N-1, the level of the first relay device is 0 Or, the parent node as a node at the final level does not allow access to child nodes, which is not limited in this embodiment. Taking FIG. 3 as an example, the relay system includes 4 levels. If the level of the parent node of the first relay device is 2, then the level of the first relay device is 3.

Embodiment 6: The network or the system may also preset the correspondence between the level and the synchronization sequence in advance, and each synchronization signal has a corresponding synchronization sequence. Then, the first relay device may determine the synchronization sequence and the corresponding synchronization sequence corresponding to the received synchronization signal. With this correspondence, the level of the parent node of the first relay device can be determined. Further, the first relay device may determine the next level of the level where the parent node is located as the level of the first relay device in the relay system.

Optionally, in the embodiment of the present application, the first signal is a synchronization signal, and the first relay device sends the first signal according to the first message, including: the first relay device according to the first message And the correspondence between the synchronization sequence and each level in the relay system, sending the synchronization sequence corresponding to the level where the first relay device is located.

If the mapping relationship between the synchronization sequence and the hierarchy is pre-stored in the first relay device, or the network device pre-configures the mapping relationship between the synchronization sequence and the hierarchy for the first relay device, when the first relay device After the synchronization resource for sending the synchronization signal to the child node is determined, the synchronization sequence corresponding to the level where the first relay device is located may be sent on the determined synchronization resource.

Optionally, if the parent node or the network device dynamically allocates the transmission resources of the first signal to the first relay device, the first message is used to indicate the transmission resources of the first signal allocated to the first relay device, The method further includes the first relay device receiving a second message sent by the second relay device, the second message used to indicate the first message of at least one level above the level where the first relay device is located Signal transmission resources.

The parent node may send the parent node and transmission resources corresponding to a higher level than the parent node to the first relay device. For example, the level of the first relay device is G, and the parent node can set the level to (G-1), (G-2), ..., (GM) (M is a positive integer less than or equal to G, and level 0 indicates The highest level) transmission resources are sent to the first relay device. M may be a configurable parameter. Then, the first relay device can obtain the transmission resources of the parent node and higher levels, and when it allocates the transmission resources of the first signal to the child nodes, it can avoid conflicts with the transmission resources of higher levels.

Optionally, when the network or system pre-configures transmission resources for each level in the relay system, it may also consider that the transmission resources of different levels are staggered in time. For example, it is ensured that the transmission resources of at least two adjacent levels are staggered in time, and transmission resource conflicts can also be avoided.

FIG. 4 shows a schematic block diagram of a signal transmission method 300 according to an embodiment of the present application. As shown in FIG. 4, the method 300 includes some or all of the following:

S310. The second relay device sends a first message to the first relay device, where the first message is used to indicate the transmission resource of the first signal.

It should be noted that the second relay device may be a parent node of the first relay device. Optionally, in the embodiment of the present application, the relay system includes multiple levels, and the first message is used to indicate the transmission resource of the first signal corresponding to each level of the multiple levels, or the first The message is used to indicate the transmission resource of the first signal allocated to the first relay device.

Optionally, in the embodiment of the present application, the first message is used to indicate the transmission resource of the first signal allocated to the first relay device, and the method further includes: the second relay device The relay device sends a second message, and the second message is used to indicate a transmission resource of the first signal in at least one level above the level where the first relay device is located.

Optionally, in the embodiment of the present application, the second relay device sends a first message to the first relay device, including: the second relay device uses a broadcast message, a radio resource control RRC signal, or a downlink control message DCI Send the first message to the first relay device.

Optionally, in the embodiment of the present application, the first signal is a synchronization signal, a tracking reference signal TRS, or a channel status information-reference signal CSI-RS.

It should be understood that the interaction and related characteristics and functions between the second relay device and the first relay device described by the second relay device correspond to the related characteristics and functions of the first relay device. That is, what message the first relay device sends to the second relay device, and the second relay device receives the corresponding message from the first relay device.

FIG. 5 shows a schematic block diagram of a signal transmission method 400 according to an embodiment of the present application. As shown in FIG. 5, the method 400 includes some or all of the following:

S410. The network device sends a first message to the first relay device. The first message is used to indicate that the first message is used to indicate the transmission resource of the first signal.

Optionally, in the embodiment of the present application, the relay system includes multiple levels, and the first message is used to indicate the transmission resource of the first signal corresponding to each level of the multiple levels, or the first The message is used to indicate the transmission resource of the first signal allocated to the first relay device.

Optionally, in the embodiment of the present application, the network device sends the first message to the first relay device, including: the network device sends a message to the station through a broadcast message, a radio resource control RRC signal, or a downlink control message DCI The first relay device sends the first message.

Optionally, in the embodiment of the present application, the first signal is a synchronization signal, a tracking reference signal TRS, or a channel status information-reference signal CSI-RS.

It should be understood that the interaction and related characteristics and functions between the network device and the first relay device described by the network device correspond to the related characteristics and functions of the first relay device. That is to say, what message the first relay device sends to the network device, the network device receives the corresponding message from the first relay device.

It should also be understood that in various embodiments of the present application, the size of the sequence numbers of the above processes does not mean the order of execution, and the execution order of each process should be determined by its function and inherent logic, and should not be applied to the embodiments of the present application. The implementation process constitutes no limitation.

It should also be understood that the term "and/or" in this article is merely an association relationship describing an associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate: A exists alone, and A and B exist simultaneously. There are three cases of B alone. In addition, the character "/" in this article generally indicates that the related objects before and after are a "or" relationship.

The method for transmitting a signal according to an embodiment of the present application is described in detail above, and the device for transmitting a signal according to an embodiment of the present application will be described below with reference to FIGS. 6 to 11. The technical features described in the method embodiment are applicable to the following device implementations example.

FIG. 6 shows a schematic block diagram of the relay device 500 according to an embodiment of the present application. The relay device is a first relay device. As shown in FIG. 5, the relay device 500 includes:

The obtaining unit 510 is used to obtain a first message, and the first message is used to indicate a transmission resource of the first signal

The sending unit 520 is configured to send the first signal according to the first message.

Optionally, in the embodiment of the present application, the relay system includes multiple levels, and the first message is used to indicate a correspondence between each level of the multiple levels and the transmission resource of the first signal, or, The first message is used to indicate the transmission resources of the first signal allocated to the first relay device; the sending unit is specifically used to: according to the first message, communicate with the first relay device in the relay system The first signal is sent on the transmission resource of the first signal corresponding to the level in or based on the first message, the first signal is sent on the transmission resource of the first signal allocated to the first relay device.

Optionally, in the embodiment of the present application, the obtaining unit is specifically configured to: receive the first message sent by a second relay device or a network device, and the second relay device is a parent of the first relay device The node, or, the first message is pre-stored in the first relay device.

Optionally, in the embodiment of the present application, the relay device further includes: a first determining unit, configured to determine the second relay device.

Optionally, in the embodiment of the present application, the relay device further includes: a second determination unit, configured to determine the level of the second relay device in the relay system; a third determination unit, configured to The next level of the level where the second relay device is located is determined as the level of the first relay device in the relay system.

Optionally, in the embodiment of the present application, the second determining unit is specifically configured to: according to the first message and the transmission resource of the first signal sent by the second relay device, determine that the second relay device is in the Hierarchy in the relay system.

Optionally, in the embodiment of the present application, the first signal is a synchronization signal, and the second determining unit is specifically configured to: according to the correspondence between the synchronization sequence and each level in the relay system and the second relay device The synchronization sequence corresponding to the transmitted synchronization signal determines the level of the second relay device in the relay system.

Optionally, in the embodiment of the present application, the first determining unit is specifically configured to: receive at least one first signal, the at least one first signal is sent by at least one relay device, and according to the at least one The first signal determines the second relay device.

Optionally, in the embodiment of the present application, the at least one first signal includes K first signals, K is a positive integer greater than or equal to 1, and the first determining unit determines the first signal according to the at least one first signal The second relay device includes: measuring the strength of the K first signals; and determining the second relay device according to the strength of the K first signals.

Optionally, in the embodiment of the present application, the at least one first signal includes K first signals, K is a positive integer greater than or equal to 1, and the first determining unit determines the first signal according to the at least one first signal The second relay device includes: determining, according to the K first signals, at least one level in which the K first signals correspond to the one-to-one relay device; determining the first level from the at least one level; if the J relay devices of the first level send M first signals of the K first signals, and measure the strength of the J first signals, M is a positive integer less than or equal to K, and J is less than or equal to Positive integer of M; determine the second relay device according to the strength of the M first signals.

Optionally, in the embodiment of the present application, the first signal is a synchronization signal, and the sending unit is specifically configured to send the first message according to the correspondence between the first message and the synchronization sequence and each level in the relay system. The synchronization sequence corresponding to the level where a relay device is located.

Optionally, in the embodiment of the present application, the first message is used to indicate the transmission resource of the first signal allocated to the first relay device. The relay device further includes: a receiving unit, configured to receive the first message A second message sent by two relay devices, the second message is used to indicate the transmission resource of the first signal in at least one level above the level where the first relay device is located, the second relay device is the first The parent node of a relay device.

Optionally, in the embodiment of the present application, the first message is carried in a broadcast message, a radio resource control RRC signal, or a downlink control message DCI.

Optionally, in the embodiment of the present application, the first signal is a synchronization signal, a tracking reference signal TRS, or a channel status information-reference signal CSI-RS.

It should be understood that the relay device 500 according to an embodiment of the present application may correspond to the relay device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the relay device 500 are respectively for realizing FIG. 2 The corresponding process of the first relay device in the method will not be repeated here for brevity.

FIG. 7 shows a schematic block diagram of the relay device 600 according to an embodiment of the present application. The relay device is used in a relay system. The relay device is a first relay device. As shown in FIG. 7, the relay device 600 includes:

The sending unit 610 is configured to send a first message to the first relay device, where the first message is used to indicate the transmission resource of the first signal.

Optionally, in the embodiment of the present application, the second relay device is a parent node of the first relay device.

Optionally, in the embodiment of the present application, the relay system includes multiple levels, and the first message is used to indicate the transmission resource of the first signal corresponding to each level of the multiple levels, or the first The message is used to indicate the transmission resource of the first signal allocated to the first relay device.

Optionally, in the embodiment of the present application, the first message is used to indicate the transmission resource of the first signal allocated to the first relay device, and the sending unit is further configured to: send to the first relay device The second message is used to indicate the transmission resources of the first signal in at least one level above the level where the first relay device is located.

Optionally, in the embodiment of the present application, the sending unit is specifically configured to: the second relay device sends the first message to the first relay device through a broadcast message, a radio resource control RRC signal, or a downlink control message DCI .

Optionally, in the embodiment of the present application, the first signal is a synchronization signal, a tracking reference signal TRS, or a channel status information-reference signal CSI-RS.

It should be understood that the relay device 600 according to the embodiment of the present application may correspond to the relay device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of the units in the relay device 600 are respectively for realizing FIG. 4 The corresponding process of the second relay device in the method will not be repeated here for brevity.

FIG. 8 shows a schematic block diagram of a network device 700 according to an embodiment of the present application. As shown in FIG. 8, the network device is used in a relay system, and the network device 700 includes:

The sending unit 710 is configured to send a first message to the first relay device, where the first message is used to indicate that the first message is used to indicate the transmission resource of the first signal.

Optionally, in the embodiment of the present application, the relay system includes multiple levels, and the first message is used to indicate the transmission resource of the first signal corresponding to each level of the multiple levels, or the first The message is used to indicate the transmission resource of the first signal allocated to the first relay device.

Optionally, in the embodiment of the present application, the sending unit is specifically configured to: the network device sends the first message to the first relay device through a broadcast message, a radio resource control RRC signal, or a downlink control message DCI.

Optionally, in the embodiment of the present application, the first signal is a synchronization signal, a tracking reference signal TRS, or a channel status information-reference signal CSI-RS.

It should be understood that the network device 700 according to the embodiment of the present application may correspond to the network device in the method embodiment of the present application, and the above and other operations and/or functions of each unit in the network device 700 are to implement FIG. 5 respectively. The corresponding process of the network equipment in the method will not be repeated here for brevity.

As shown in FIG. 9, an embodiment of the present application further provides a relay device 800. The relay device 800 may be the relay device 500 in FIG. 6, which can be used to execute the first method corresponding to the method 200 in FIG. 2. The contents of the relay device. The relay device 800 shown in FIG. 9 includes a processor 810, and the processor 810 can call and run a computer program from the memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 9, the relay device 800 may further include a memory 820. The processor 810 can call and run a computer program from the memory 820 to implement the method in the embodiments of the present application.

The memory 820 may be a separate device independent of the processor 810, or may be integrated in the processor 810.

Optionally, as shown in FIG. 9, the relay device 800 may further include a transceiver 830, and the processor 810 may control the transceiver 830 to communicate with other devices, specifically, may send messages or data to other devices, or receive Messages or data sent by other devices.

Among them, the transceiver 830 may include a transmitter and a receiver. The transceiver 830 may further include antennas, and the number of antennas may be one or more.

Optionally, the relay device 800 may be a relay device according to an embodiment of the present application, and the relay device 800 may implement the corresponding process implemented by the relay device in each method of the embodiment of the present application. For simplicity, here No longer.

In a specific embodiment, the first receiving unit, the second receiving unit, and the sending unit in the relay device 600 may be implemented by the transceiver 830 in FIG. 9. The first determination unit, the second determination unit, the third determination unit, and the acquisition unit in the relay device 600 may be implemented by the processor 810 in FIG. 9.

As shown in FIG. 10, an embodiment of the present application further provides a relay device 900. The relay device 900 may be the relay device 600 in FIG. 7, which can be used to execute the second method corresponding to the method 300 in FIG. The contents of the relay device. The relay device 900 shown in FIG. 10 includes a processor 910, and the processor 910 can call and run a computer program from the memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 10, the relay device 900 may further include a memory 920. The processor 910 can call and run a computer program from the memory 920 to implement the method in the embodiments of the present application.

The memory 920 may be a separate device independent of the processor 910, or may be integrated in the processor 910.

Optionally, as shown in FIG. 10, the relay device 900 may further include a transceiver 930, and the processor 910 may control the transceiver 930 to communicate with other devices, specifically, may send messages or data to other devices, or receive Messages or data sent by other devices.

Among them, the transceiver 930 may include a transmitter and a receiver. The transceiver 930 may further include antennas, and the number of antennas may be one or more.

Optionally, the relay device 900 may be a relay device according to an embodiment of the present application, and the relay device 900 may implement the corresponding process implemented by the relay device in each method of the embodiment of the present application. For brevity, here No longer.

In a specific embodiment, the sending unit in the relay device 700 may be implemented by the transceiver 930 in FIG. 10.

As shown in FIG. 11, an embodiment of the present application further provides a network device 1000. The network device 1000 may be the network device 700 in FIG. 8, which can be used to execute a network corresponding to the method 400 in FIG. The content of the device. The network device 1000 shown in FIG. 11 includes a processor 1010. The processor 1010 can call and run a computer program from the memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 11, the network device 1000 may further include a memory 1020. The processor 1010 can call and run a computer program from the memory 1020 to implement the method in the embodiments of the present application.

The memory 1020 may be a separate device independent of the processor 1010, or may be integrated in the processor 1010.

Optionally, as shown in FIG. 11, the network device 1000 may further include a transceiver 1030, and the processor 1010 may control the transceiver 1030 to communicate with other devices, specifically, may send messages or data to other devices, or receive Messages or data sent by other devices.

Among them, the transceiver 1030 may include a transmitter and a receiver. The transceiver 1030 may further include antennas, and the number of antennas may be one or more.

Optionally, the network device 1000 may be the network device of the embodiment of the present application, and the network device 1000 may implement the corresponding process implemented by the network device in each method of the embodiment of the present application. For simplicity, here No longer.

In a specific embodiment, the sending unit in the network device 700 may be implemented by the transceiver 1030 in FIG. 11.

FIG. 12 is a schematic block diagram of a wafer 2000 according to an embodiment of the present application. The chip 2000 shown in FIG. 12 includes a processor 2010. The processor 2010 can call and run a computer program from the memory to implement the method 200 in the embodiment of the present application.

Optionally, as shown in FIG. 12, the chip 2000 may further include a memory 2020. The processor 2010 can call and run a computer program from the memory 2020 to implement the method in the embodiments of the present application.

The memory 2020 may be a separate device independent of the processor 2010, or may be integrated in the processor 2010.

Optionally, the wafer 2000 may further include an input interface 2030. The processor 2010 can control the input interface 2030 to communicate with other devices or chips. Specifically, it can obtain messages or data sent by other devices or chips.

Optionally, the wafer 2000 may further include an output interface 2040. The processor 2010 can control the output interface 2040 to communicate with other devices or chips. Specifically, it can output messages or data to other devices or chips.

Optionally, the wafer can be applied to the first relay device in the embodiment of the present application, and the wafer can implement the corresponding process implemented by the terminal device in the method 200 of the embodiment of the present application. .

It should be understood that the wafers mentioned in the embodiments of the present application may also be referred to as system-level wafers, system wafers, wafer systems, or system-on-chip wafers.

13 is a schematic block diagram of a wafer 3000 according to an embodiment of the present application. The chip 3000 shown in FIG. 13 includes a processor 3010, and the processor 3010 can call and run a computer program from the memory to implement the method 300 in the embodiment of the present application.

Optionally, as shown in FIG. 13, the wafer 3000 may further include a memory 3020. The processor 3010 can call and run a computer program from the memory 3020 to implement the method in the embodiments of the present application.

The memory 3020 may be a separate device independent of the processor 3010, or may be integrated in the processor 3010.

Optionally, the wafer 3000 may further include an input interface 3030. The processor 3010 can control the input interface 3030 to communicate with other devices or chips. Specifically, it can obtain messages or data sent by other devices or chips.

Optionally, the wafer 3000 may further include an output interface 3040. The processor 3010 can control the output interface 3040 to communicate with other devices or chips. Specifically, it can output messages or data to other devices or chips.

Optionally, the wafer can be applied to the second relay device in the embodiment of the present application, and the wafer can implement the corresponding process implemented by the terminal device in the method 300 of the embodiment of the present application. .

It should be understood that the wafers mentioned in the embodiments of the present application may also be referred to as system-level wafers, system wafers, wafer systems, or system-on-chip wafers.

FIG. 14 is a schematic block diagram of a wafer 4000 according to an embodiment of the present application. The chip 4000 shown in FIG. 14 includes a processor 4010. The processor 4010 can call and run a computer program from the memory to implement the method 400 in the embodiment of the present application.

Optionally, as shown in FIG. 14, the wafer 4000 may further include a memory 4020. The processor 4010 can call and run a computer program from the memory 4020 to implement the method in the embodiments of the present application.

The memory 4020 may be a separate device independent of the processor 4010, or may be integrated in the processor 4010.

Optionally, the wafer 4000 may further include an input interface 4030. The processor 4010 can control the input interface 4030 to communicate with other devices or chips. Specifically, it can obtain messages or data sent by other devices or chips.

Optionally, the wafer 4000 may further include an output interface 4040. The processor 4010 can control the output interface 4040 to communicate with other devices or chips. Specifically, it can output messages or data to other devices or chips.

Optionally, the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the network device in the method 400 of the embodiment of the present application.

It should be understood that the wafers mentioned in the embodiments of the present application may also be referred to as system-level wafers, system wafers, wafer systems, or system-on-chip wafers.

15 is a schematic block diagram of a communication system 5000 according to an embodiment of the present application. As shown in FIG. 15, the communication system 5000 includes a first relay device 5010 and a second relay device 5020. The first relay device 5010 is used to obtain a first message, the first message is used to indicate the transmission resource of the first signal, and the first signal is sent according to the first message;

The second relay device 5020 is used to send a first message to the first relay device, and the first message is used to indicate the transmission resource of the first signal.

The first relay device 5010 may be used to implement the corresponding functions implemented by the first relay device in the above method 200, and the composition of the first relay device 5010 may be as shown in the relay device 500 in FIG. For the sake of brevity, I will not repeat them here.

The second relay device 5020 may be used to implement the corresponding functions implemented by the second relay device in the above method 300, and the composition of the second relay device 5020 may be as shown in the relay device 600 in FIG. 7, For brevity, I will not repeat them here.

16 is a schematic block diagram of a communication system 6000 according to an embodiment of the present application. As shown in FIG. 16, the communication system 6000 includes a first relay device 6010 and a network device 6020. The first relay device 6010 is used to obtain a first message, the first message is used to indicate the transmission resource of the first signal, and the first signal is sent according to the first message;

The network device 6020 is used to send a first message to the first relay device, and the first message is used to indicate the transmission resource of the first signal.

The first relay device 6010 may be used to implement the corresponding functions implemented by the first relay device in the above method 200, and the composition of the first relay device 6010 may be as shown in the relay device 600 in FIG. For the sake of brevity, I will not repeat them here.

The network device 6020 may be used to implement the corresponding functions implemented by the network device in the above method 400, and the composition of the network device 6020 may be as shown in the network device 600 in FIG. Repeat again.

Persons of ordinary skill in the art may realize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application of the technical solution and design constraints. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that for the convenience and conciseness of the description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the unit is only a division of logical functions. In actual implementation, there may be other divisions, for example, multiple units or components may be combined or integrated To another system, or some features can be ignored, or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be electrical, mechanical or other forms.

The unit described as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone, or two or more units may be integrated into one unit.

If this function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application essentially or part of the contribution to the existing technology or part of the technical solution can be embodied in the form of a software product, the computer software product is stored in a storage medium, including several The instruction is used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the embodiments of the present application. The aforementioned storage media include: flash drives, mobile hard drives, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disks or optical discs, etc. can store program codes Medium.

The above is only the specific implementation of this application, but the scope of protection of this application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in this application. It should be covered by the scope of protection of this application. Therefore, the protection scope of this application should be regarded as the protection scope of the patent application scope.

100‧‧‧Network architecture 110‧‧‧Anchor node 120‧‧‧Relay equipment 130‧‧‧terminal equipment 200, 300, 400 ‧‧‧ 210, 220, 310, 410‧‧‧ steps 500, 600, 800 ‧‧‧ relay equipment 510‧‧‧ acquisition unit 520, 610, 710‧‧‧ sending unit 700, 1000, 6020‧‧‧ network equipment 810, 910, 1010, 2010, 3010, 4010‧‧‧ processor 820, 920, 1020, 2020, 3020, 4020‧‧‧ memory 830, 930, 1030‧‧‧ transceiver 2000, 3000‧‧‧chip 2030, 3030, 4030‧‧‧ input interface 2040, 3040, 4040‧‧‧ output interface 5000、6000‧‧‧Communication system 5010, 6010‧‧‧ First relay equipment 5020‧‧‧Second relay equipment

FIG. 1 shows a schematic diagram of an application scenario according to an embodiment of the present application.

FIG. 2 shows a schematic block diagram of a signal transmission method according to an embodiment of the present application.

FIG. 3 shows a hierarchical distribution diagram of the relay network according to an embodiment of the present application.

FIG. 4 shows another schematic block diagram of a signal transmission method according to an embodiment of the present application.

FIG. 5 shows yet another schematic block diagram of a signal transmission method according to an embodiment of the present application.

FIG. 6 shows a schematic block diagram of a relay device according to an embodiment of the present application.

FIG. 7 shows another schematic block diagram of the relay device according to the embodiment of the present application.

FIG. 8 shows a schematic block diagram of a network device according to an embodiment of the present application.

FIG. 9 shows yet another schematic block diagram of the relay device of the embodiment of the present application.

FIG. 10 shows yet another schematic block diagram of the relay device of the embodiment of the present application.

FIG. 11 shows another schematic block diagram of the network device according to the embodiment of the present application.

FIG. 12 shows a schematic block diagram of a wafer according to an embodiment of the present application.

FIG. 13 shows another schematic block diagram of the wafer of the embodiment of the present application.

FIG. 14 shows yet another schematic block diagram of the wafer of the embodiment of the present application.

15 shows a schematic block diagram of a communication system according to an embodiment of the present application.

FIG. 16 shows a schematic block diagram of a communication system according to an embodiment of the present application.

200‧‧‧Method

210, 220‧‧‧ steps

Claims (22)

A signal transmission method, characterized in that the method is applied to a relay system, the method includes: The first relay device obtains a first message, and the first message is used to indicate a transmission resource of the first signal; The first relay device sends the first signal according to the first message. The method according to item 1 of the patent application range, wherein the relay system includes multiple levels, and the first message is used to indicate each level of the multiple levels and the first signal The corresponding relationship of the transmission resources of, or the first message is used to indicate the transmission resources of the first signal allocated to the first relay device; The first relay device sends the first signal according to the first message, including: The first relay device sends the first signal on the transmission resource of the first signal corresponding to the level of the first relay device in the relay system according to the first message, or The first relay device sends the first signal on the transmission resource of the first signal allocated to the first relay device according to the first message. According to the method described in item 1 of the patent application scope, the first relay device acquiring the first message includes: The first relay device receives the first message sent by a second relay device or a network device, and the second relay device is a parent node of the first relay device; or, The first message is pre-stored in the first relay device. The method according to item 3 of the patent application scope, characterized in that the method further comprises: The first relay device determines the second relay device. The method according to item 4 of the patent application scope, wherein the method further comprises: The first relay device determines the level of the second relay device in the relay system; The first relay device determines the next level of the level where the second relay device is located as the level of the first relay device in the relay system. The method according to item 5 of the patent application scope, wherein the first relay device determining the level of the second relay device in the relay system includes: The first relay device determines the level of the second relay device in the relay system according to the transmission resources of the first message and the first signal sent by the second relay device; or, The first relay device determines that the second relay device is based on the correspondence between the synchronization sequence and each level in the relay system and the synchronization sequence corresponding to the synchronization signal sent by the second relay device In the hierarchy in the relay system, the first signal is a synchronization signal. The method according to item 4 of the patent application scope, wherein the determining of the second relay device by the first relay device includes: The first relay device receives at least one of the first signals, and the at least one first signal is sent by at least one relay device; The first relay device determines the second relay device based on the at least one first signal. The method according to item 7 of the patent application range, wherein the at least one first signal includes K first signals, K is a positive integer greater than or equal to 1, and the first relay device At least one of the first signals to determine the second relay device includes: The first relay device measures the strength of the K first signals; the first relay device determines the second relay device according to the strength of the K first signals; or, The first relay device determines at least one level where the relay device that sends the K first signals is located according to the K first signals; the first relay device determines the size of the at least one level To determine the second relay device; or, The first relay device determines at least one level where the relay device that sends the K first signals is located according to the K first signals; the first relay device determines from the at least one level First level; if J relay devices of the first level send M first signals of the K first signals, the first relay device measures the strength of the M first signals , M is a positive integer less than or equal to K, and J is a positive integer less than or equal to M; the first relay device determines the second relay device according to the strength of the M first signals. The method according to item 1 of the patent application range, wherein the first signal is a synchronization signal, and the first relay device sends the first signal according to the first message, including: The first relay device sends the synchronization sequence corresponding to the level where the first relay device is located according to the correspondence between the first message and the synchronization sequence and each level in the relay system. The method according to item 1 of the patent application range, wherein the first message is used to indicate the transmission resource of the first signal allocated to the first relay device, and the method further includes The first relay device receives a second message sent by a second relay device, where the second message is used to indicate at least one level of the first signal above the level where the first relay device is located For transmission resources, the second relay device is a parent node of the first relay device. The method according to item 1 of the patent application scope, wherein the first message is carried in a broadcast message, a radio resource control RRC signal, or a downlink control message DCI. The method according to any one of items 8 to 11 of the patent application range, wherein the first signal is a synchronization signal, a tracking reference signal TRS, or a channel status information-reference signal CSI-RS. A signal transmission relay device, characterized in that the relay device is applied in a relay system, the relay device is a second relay device, and the relay device includes: The sending unit is configured to send a first message to the first relay device, where the first message is used to indicate the transmission resource of the first signal. The relay device according to item 13 of the patent application range, wherein the second relay device is a parent node of the first relay device. The relay device according to item 13 of the patent application range, wherein the relay system includes a plurality of levels, and the first message is used to indicate the corresponding to each level of the plurality of levels The transmission resource of the first signal, or the first message is used to indicate the transmission resource of the first signal allocated to the first relay device. The relay device according to any one of items 13 to 15 of the patent application range, wherein the first message is used to indicate the transmission resource of the first signal allocated to the first relay device , The sending unit is also used to: Sending a second message to the first relay device, where the second message is used to indicate a transmission resource of the first signal in at least one level above the level where the first relay device is located. The relay device according to any one of items 13 to 15 of the patent application range, wherein the sending unit is specifically configured to: The second relay device sends the first message to the first relay device through a broadcast message, a radio resource control RRC signal, or a downlink control message DCI. The relay device according to any one of claims 13 to 15, wherein the first signal is a synchronization signal, a tracking reference signal TRS, or a channel status information-reference signal CSI-RS. A network device, characterized in that the network device is used in a relay system, and the network device includes: The sending unit is configured to send a first message to the first relay device, where the first message is used to indicate that the first message is used to indicate the transmission resource of the first signal. The network device according to item 19 of the patent application range, wherein the relay system includes multiple levels, and the first message is used to indicate the corresponding level of each of the multiple levels The transmission resource of the first signal, or the first message is used to indicate the transmission resource of the first signal allocated to the first relay device. The network device according to item 19 of the patent application range, wherein the sending unit is specifically configured to: The network device sends the first message to the first relay device through a broadcast message, a radio resource control RRC signal, or a downlink control message DCI. The network device according to any one of items 19 to 21 of the patent application range, wherein the first signal is a synchronization signal, a tracking reference signal TRS, or a channel status information-reference signal CSI-RS.

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