CN110475309B

CN110475309B - Signal transmission method and device

Info

Publication number: CN110475309B
Application number: CN201810451305.2A
Authority: CN
Inventors: 陈磊; 刘凤威; 邱晶
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-05-11
Filing date: 2018-05-11
Publication date: 2023-02-03
Anticipated expiration: 2038-05-11
Also published as: WO2019214487A1; CN110475309A

Abstract

The embodiment of the application provides a signal transmission method, which comprises the following steps: the relay node determines time resource information for transmitting a first signal, wherein the time resource information comprises one or more time resources; the relay node receives configuration signaling from a superior node, the configuration signaling including information for configuring a measurement window of the relay node, the information of the measurement window including at least one of: the period of the measurement window, the length of the measurement window, and the offset of the measurement window, wherein a first time resource of the one or more time resources and a time resource corresponding to the measurement window are all overlapped or partially overlapped; and the relay node receives a second signal in the time resource corresponding to the measurement window. By the method provided by the embodiment of the application, the measurement overhead can be reduced.

Description

Signal transmission method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a signal transmission method and apparatus.

Background

A relay technology is introduced in a Long Term Evolution (LTE) system. By deploying Relay Nodes (RNs) in the network to forward data between the base station and the terminal, the relay technology can achieve the purposes of enhancing network capacity and solving coverage holes. Fig. 1 is a schematic diagram of a network topology in a relay scenario. As shown in fig. 1, a link between the base station and the relay node is called a backhaul link, and a link between the relay node and the terminal and a link between the base station and the terminal are called an access link.

In next generation communication systems (e.g., 5G systems), relay technology may still be supported. In 5G systems, an important feature of relay technology is the support of multi-hop and multi-connection transmission. Fig. 2 is a schematic diagram of a network topology of another relay scenario. As shown in fig. 2, the relay node 1 and the base station have established a connection. When the relay node 2 accesses the relay node 1 and becomes a lower node of the relay node 1, the relay node 2 has a multi-hop relay structure with the base station. On the other hand, if the relay node 2 and other base stations have already established a connection, the relay node 1 may also access the relay node 2 to become a subordinate node of the relay node 2. This configuration is a multi-connection relay configuration for the relay node 1. I.e. there is a simultaneous connection between the relay node 1 and the base station and with the relay node 2.

In order to establish a multi-hop multi-connection relay structure, a relay node needs to be able to discover its neighboring relay nodes or base stations. Further, the relay node needs to be able to establish synchronization with these neighboring relay nodes or base stations and measure their signal quality.

Disclosure of Invention

The embodiment of the application provides a signal transmission method and a signal transmission device, which are used for enabling a relay node to receive signals of other relay nodes, so that the relay node can discover and measure other relay nodes.

In a first aspect, an embodiment of the present application provides a signal transmission method, including: the relay node determines time resource information for transmitting a first signal, wherein the time resource information comprises one or more time resources; the relay node receives configuration signaling from a superordinate node, the configuration signaling including information for configuring a measurement window of the relay node, the information of the measurement window including at least one of: the period of the measurement window, the length of the measurement window, and the offset of the measurement window, wherein a first time resource of the one or more time resources and a time resource corresponding to the measurement window are all overlapped or partially overlapped; and the relay node receives a second signal in the time resource corresponding to the measurement window. It should be noted that in some cases, the terminal may also need to function as a relay. Therefore, the method performed by the relay node according to the embodiment of the present application may also be performed by the terminal.

By the method provided by the embodiment of the application, the measurement overhead can be reduced. The method provided by the embodiment of the application can measure N other relay nodes. For a relay node, it can measure other relay nodes within a measurement window without separately measuring for each relay node. This can greatly reduce the measurement overhead.

In one possible design, the relay node does not transmit the first signal on a time resource where the first time resource and a time resource corresponding to the measurement window are completely or partially overlapped. The first signal is not transmitted on the overlapped time resource, so that the saved time resource is used for receiving the second signal, and the relay node can synchronize, discover or measure other relay nodes or base stations transmitting the second signal according to the second signal. Additionally, the relay node may also transmit the first signal on a second time resource of the one or more time resources.

In one possible design, the first signal includes a first synchronization signal block SSB and a second SSB. Wherein the first SSB is used for synchronization, discovery or measurement of a backhaul link, and the second SSB is used for synchronization, discovery or measurement of an access link. It should be noted that the relay node may communicate with the superordinate node in the role (or identity) of the terminal in some cases, for example, when the backhaul link has quality problem or initial access, the relay node may also use the second SSB for synchronization, discovery or measurement in this case.

In one possible design, the overlapping or partially overlapping of the first time resource of the one or more time resources and the time resource corresponding to the measurement window includes: and the time resource used for transmitting the first SSB in the first time resource is completely or partially overlapped with the time resource corresponding to the measurement window. When the first time resource is used for carrying both the first SSB and the second SSB, the part of the first time resource used for carrying the first SSB may be taken out for receiving the second signal, so as to implement synchronization, discovery, or measurement for other relay nodes or base stations. And when the time resource used for transmitting the second SSB in the first time resource is completely or partially overlapped with the time resource corresponding to the measurement window, the relay node sends the second SSB. At this time, the relay node does not receive the second signal. The relay node also does not synchronize, discover, or measure other relay nodes or base stations.

In one possible design, the first and second SSBs are mapped on different frequency resources; or the primary synchronization signal PSS sequences in the first SSB and the second SSB are different; or the scrambling code or Cyclic Redundancy Check (CRC) code of the physical broadcast channel in the first SSB and the second SSB are different.

In one possible design, the relay node receives a second signal from a relay node that is adjacent to the relay node. The second signal may be used for synchronization, discovery or measurement of a neighboring relay node.

The method provided by the embodiment of the application can be used for synchronization, discovery or measurement of one or any plurality of relay nodes or base stations. Its scalability is very good. In addition, the configuration required for this method is also relatively simple.

In a second aspect, an embodiment of the present application provides a signal transmission method, including: the superior node generates a configuration signaling; the superior node sends configuration signaling to the relay node, wherein the configuration signaling comprises information of a measurement window for configuring the relay node, and the information of the measurement window comprises at least one of the following: the relay node is configured to send a first signal to a first relay node, where the first time resource of one or more time resources used for sending the first signal overlaps with a time resource corresponding to the measurement window. The method enables the relay node to receive a second signal within the time resource corresponding to the measurement window. It should be noted that in some cases, the terminal may also need to function as a relay. Therefore, the method performed by the relay node provided by the embodiment of the present application may also be performed by the terminal.

By the method provided by the embodiment of the application, the measurement overhead can be reduced. The method provided by the embodiment of the application can measure N other relay nodes. However, for a relay node, it may measure other relay nodes within a measurement window without separately measuring for each relay node. This can greatly reduce the measurement overhead.

In a third aspect, an embodiment of the present application provides a method for sending a synchronization signal block SSB, including: the relay node transmits a first SSB and a second SSB, wherein the first SSB is used for synchronization of a backhaul link, and the second SSB is used for synchronization of an access link. The method also includes the relay node generating a first SSB and a second SSB.

Wherein the first SSB and the second SSB are mapped on different frequency resources; or the primary synchronization signal PSS sequences in the first SSB and the second SSB are different; or the scrambling code or Cyclic Redundancy Check (CRC) code of the physical broadcast signal in the first SSB and the second SSB are different.

In a fourth aspect, an embodiment of the present application provides a signal transmission apparatus, including: the processing module is used for determining time resource information for transmitting the first signal, wherein the time resource information comprises one or more time resources; a receiving module, configured to receive configuration signaling from a superior node, where the configuration signaling includes information for configuring a measurement window of the apparatus, and the information of the measurement window includes at least one of: the period of the measurement window, the length of the measurement window, and the offset of the measurement window, wherein a first time resource of the one or more time resources and a time resource corresponding to the measurement window are all overlapped or partially overlapped; the receiving module is further configured to receive a second signal in a time resource corresponding to the measurement window. The apparatus may be a relay node. It should be noted that in some cases, the terminal may also need to function as a relay. Thus, the device may also be a terminal.

By the device provided by the embodiment of the application, the measurement overhead can be reduced. The device provided by the embodiment of the application can measure N other relay nodes. For a relay node, it can measure other relay nodes within a measurement window without separately measuring for each relay node. This can greatly reduce the measurement overhead.

In one possible design, the apparatus further includes a transmitting module; the sending module is configured to not send the first signal on a time resource where the first time resource and the time resource corresponding to the measurement window are completely overlapped or partially overlapped. The first signal is not transmitted on the overlapped time resource, so that the saved time resource is used for receiving the second signal, and the relay node can synchronize, discover or measure other relay nodes or base stations transmitting the second signal according to the second signal. Additionally, the relay node may also transmit the first signal on a second time resource of the one or more time resources.

In one possible design, the overlapping or partial overlapping of the first time resource of the one or more time resources and the time resource corresponding to the measurement window includes: and the time resource used for transmitting the first SSB in the first time resource is completely or partially overlapped with the time resource corresponding to the measurement window. When the first time resource is used for carrying both the first SSB and the second SSB, a part of the first time resource used for carrying the first SSB may be taken out for receiving the second signal, so as to implement synchronization, discovery, or measurement for other relay nodes or base stations.

In one possible design, the first and second SSBs are mapped on different frequency resources; or the primary synchronization signal PSS sequences in the first and second SSBs are different; or the scrambling code or Cyclic Redundancy Check (CRC) code of the physical broadcast channel in the first SSB and the second SSB are different.

In one possible design, the receiving module is further configured to receive a second signal from a relay node adjacent to the apparatus. The second signal may be used for synchronization, discovery or measurement of a neighboring relay node.

The device provided by the embodiment of the application can be used for synchronization, discovery or measurement of one or any of a plurality of relay nodes or base stations. Its scalability is very good. In addition, the required configuration is relatively simple.

In a fifth aspect, an embodiment of the present application provides a signal transmission apparatus, including: the processing module is used for generating a configuration signaling; a sending module, configured to send a configuration signaling to a relay node, where the configuration signaling includes information for configuring a measurement window of the relay node, and the information of the measurement window includes at least one of the following: the relay node is configured to send a first signal to a first relay node, where the first time resource of one or more time resources used for sending the first signal overlaps with a time resource corresponding to the measurement window. The apparatus enables the relay node to receive a second signal within a time resource corresponding to the measurement window.

By the device provided by the embodiment of the application, the measurement overhead can be reduced. The device provided by the embodiment of the application can measure N other relay nodes. However, for a relay node, it may measure other relay nodes within a measurement window without separately measuring for each relay node. This can greatly reduce the measurement overhead.

In a sixth aspect, an embodiment of the present application provides a signal transmission apparatus, including: a sending module, configured to send a first SSB and a second SSB, where the first SSB is used for synchronization of a backhaul link, and the second SSB is used for synchronization of an access link. The apparatus also includes a processing module configured to generate a first SSB and a second SSB. The apparatus may be a relay node. In some cases, it may also be a terminal.

In a seventh aspect, an embodiment of the present application provides a transmission apparatus, including: the device comprises a transceiver, a memory and a processor, wherein the memory is used for storing program codes required to be executed by the processor. The transceiver is used for data transceiving between the device and other devices (such as a relay node and a superior node, a relay node and other relay nodes). The processor is configured to execute the program code stored in the memory, and in particular to execute the method as designed by any one of the first to third aspects.

In an eighth aspect, this embodiment of the present application further provides a computer-readable storage medium for storing computer software instructions for executing the functions designed in any one of the first to third aspects or any one of the first to third aspects, which contains a program designed to execute any one of the first to third aspects or any one of the first to third aspects.

In a ninth aspect, embodiments of the present application provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method as set forth in the first aspect or any one of the first to third aspects.

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 method provided in any one or any one of the first to third aspects.

In an eleventh aspect, an embodiment of the present application provides a chip, where the chip includes a processor and a memory, and the processor is configured to read a software program stored in the memory to implement the method provided in any one or any one of the first to third aspects.

Drawings

Fig. 1 is a schematic diagram of a network topology of a relay scenario;

FIG. 2 is a schematic diagram of a network topology for another relay scenario;

FIG. 3 is a schematic diagram of a set of synchronization signal bursts;

FIG. 4 is a diagram illustrating a measurement window of a terminal;

FIG. 5 is a schematic diagram of an SSB transmission method;

fig. 6 is a signal transmission method according to an embodiment of the present disclosure;

FIG. 7 is a diagram illustrating resource locations for SSBs sent by multiple nodes;

fig. 8 is a schematic diagram of a measurement window of a relay node;

fig. 9 is a schematic diagram of SSB transmission of a relay node;

fig. 10 is a schematic diagram of SSB transmission of another relay node;

fig. 11 is a schematic diagram of a signal transmission apparatus according to an embodiment of the present application;

fig. 12 is a schematic diagram of a signal transmission apparatus according to an embodiment of the present application;

fig. 13 is a schematic diagram of a signal transmission apparatus according to an embodiment of the present application;

fig. 14 is a schematic diagram of a signal transmission apparatus according to an embodiment of the present application.

Detailed Description

The network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and it can be known by a person of ordinary skill in the art that the technical solution provided in the embodiment of the present application is also applicable to similar technical problems with the evolution of the network architecture and the occurrence of a new service scenario.

The embodiment of the application can be applied to a communication system comprising the relay node. The communication system includes, but is not limited to, a Long Term Evolution (LTE) system, a long term evolution-advanced (LTE-a) system, a New Radio (NR) system, and a 5G (5G) (5 a) ^th generation) system, and the like, and can also be extended to wireless fidelity (WiFi) system, worldwide interoperability for microwave access (wlan) system, and the likeWimax) system, etc.

Illustratively, a communication system including a relay node may be as shown in fig. 1 or fig. 2. In fig. 2, a base station may serve relay node 1 and relay node 2. The terminal 1 may establish a communication connection with the base station through the relay node 1. The terminal 2 may establish a communication connection directly with the base station. The relay node 2 may establish a communication connection with the base station through the relay node 1.

The base station may be a common base station (e.g., a Node B or an eNB), a new radio controller (NR controller), a gnnode B (gNB) in a 5G system, a centralized network element (centralized unit), a new radio base station, a radio remote module, a micro base station, a distributed network element (distributed unit), a Transmission Reception Point (TRP) or a Transmission Point (TP), or any other radio access device, which is not limited in this embodiment.

A terminal may be a device having functionality to communicate with base stations and relay nodes, or may be a device that provides voice and/or data connectivity to users. For example, the terminal may be a handheld device, a vehicle-mounted device, or the like having a wireless connection function. Common terminals include, for example: the mobile phone includes a mobile phone, a tablet computer, a notebook computer, a palm computer, a Mobile Internet Device (MID), and a wearable device such as a smart watch, a smart bracelet, a pedometer, and the like. A terminal may also be referred to as a User Equipment (UE).

The relay node is a network device, and provides services such as data connection and the like for a terminal or a next-stage relay node. In the NR system, a relay node may be named as a rrtp (relay TRP), an Integrated Access and Backhaul (IAB) node, and the like. Unlike a general network device, a relay node is connected with a base station or other relay nodes through a backhaul link. In some scenarios, the terminal may also act as a relay node. A relay method in which the access link and the backhaul link share a frequency band may be referred to as an in-band relay, and a relay node operating in such a relay method may be referred to as an in-band relay node.

In 5G systems, a Synchronization Signal Block (SSB) may be used to achieve initial synchronization and cell discovery. It should be noted that SSB may also refer to a synchronization signal/physical broadcast channel Block (SS/PBCH Block). Fig. 3 is a schematic diagram of a set of synchronization signal bursts. As shown in fig. 3, the set of synchronization signal bursts includes one or more SSBs. Each SSB includes a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a physical broadcast channel, and occupies 4 Orthogonal Frequency Division Multiplexing (OFDM) symbols in total. The set of synchronization signal bursts are periodically repeatedly transmitted.

In the high frequency band, communications between the base station and the terminal are typically transmitted through narrow beams in order to improve coverage. Since both the base station and the terminal have a plurality of beams, the quality of signal transmission can be better guaranteed only when the transmission beam of the base station and the reception beam of the terminal are aligned. The 5G system utilizes a synchronization signal burst set (synchronization signal burst set) to guarantee the performance of transmission in a high frequency band. A set of synchronization signal bursts contains a maximum of 64 SSBs. Typically, the time length of a burst set of synchronization signals does not exceed 5ms, and the shortest transmission period is also 5ms. The base station completes the scanning of the transmitting beam in the cell coverage area through the SSBs. And multiple receiving beams are needed to scan multiple synchronous signal burst sets at the terminal, so as to complete the alignment and downlink synchronization of the receiving and transmitting beams. Taking downlink transmission as an example, it is assumed that the base station has M transmit beams and the terminal has N receive beams. To accomplish beam alignment, the base station may use a different transmit beam when transmitting each SSB, completing a scan of all M transmit beams by multiple SSBs in a synchronization signal burst set. The scanning of the M transmission beams here means to traverse the M transmission beams (or to transmit SSBs sequentially with the M transmission beams). For the terminal, it can use the same receiving beam to receive and measure the whole synchronization signal burst set, and change the receiving beam to measure the synchronization signal burst set for multiple times, completing the scanning of the receiving beam. The terminal selects the best one of the M x N SSB measurements, and the corresponding base station transmit beam and terminal receive beam can be considered as an aligned beam pair. And the resulting synchronization timing may be considered to be the downlink timing corresponding to the beam pair. After the synchronization is completed, the terminal may parse the cell ID information in the PSS and the SSS, thereby completing the discovery of the cell or the base station. Further, the terminal may also measure the signal quality of the PSS or the SSS and report the signal quality to the base station, and the base station performs beam management or mobility management according to the measurement information. In summary, SSB may be used for synchronization, discovery or measurement of cells or base stations or relay nodes.

In mobility measurements, it may be configured with one or two measurement windows for a particular terminal. The measurement window characterizes a period of time for performing SSB measurements. When the base station configures the measurement window for the terminal, the configuration information includes the period, offset and length of the measurement window. They are all in units of subframes. If the period of the measurement window is set to T subframes and the offset of the measurement window is set to N subframes, N may be an integer from 0 to T-1. The length of the measurement window is several (e.g. 1-5) subframes. The terminal may take a subframe satisfying the following condition as a first subframe from which the measurement window starts. Wherein, the frame number SFN of the frame where the sub-frame is located needs to satisfy: SFN mod T' = FLOOR (N/10). Where mod represents the modulo operation, FLOOR represents the rounding down operation, T' = T/10. The subframe number of the subframe in the frame where the subframe is located may be determined as follows: when the period of the measurement window is greater than 5 subframes, subframe number Subframe of the Subframe needs to satisfy Subframe = N mod 10; when the period of the measurement window is not greater than 5 subframes, the Subframe number Subframe of the Subframe needs to satisfy Subframe = N or N +5.

The above determination is an exemplary scheme, and the invention is not limited to the specific details of determining the measurement window.

When the terminal is configured with two measurement windows, the periods of the two measurement windows may be different, but need to have the same length and offset. Fig. 4 is a schematic view of a measurement window of a terminal. As shown in fig. 4, cell 1 transmits a synchronization signal burst set in a cycle of 80ms, cell 2 transmits a synchronization signal burst set in a cycle of 40ms, cell 3 transmits a synchronization signal burst set in a cycle of 20ms, and cell 4 transmits a synchronization signal burst set in a cycle of 10 ms. The base station configures two measurement windows for the terminal, and the two measurement windows are used for measuring SSBs in synchronous signal burst sets of four cells. The measurement window 1 and the measurement window 2 of the terminal have different periods, which are respectively used for measuring different cells. They will periodically overlap due to the same offset. For example, the period of the measurement window 1 is 20ms and the period of the measurement window 2 is 80ms, and thus, the two measurement windows are overlapped in the first period and the last period of fig. 4. Since the synchronization signal burst sets transmitted by the cells need to be located in the measurement window of the terminal to be measured, it is implicitly indicated that the transmission times of the synchronization signal burst sets of the cells to be measured also overlap periodically. Otherwise it will not be measured by the terminal.

For a terminal, a relay node may be considered as a base station. It may provide access services for the terminal. The terminal does not distinguish whether it accesses a normal base station or a relay node. Therefore, the relay node also needs to transmit the synchronization signal burst set according to the above rule. Meanwhile, since the relay nodes also need to synchronize, discover or measure with each other, the relay nodes also need to send a synchronization signal burst set for measurement by other relay nodes. Meanwhile, the relay node also needs to detect the synchronization signal burst set of the base station or other relay nodes. However, due to the half-duplex constraint of a relay node, it cannot measure SSBs in synchronization signal burst sets of other relay nodes or base stations while transmitting the synchronization signal burst sets, and therefore, it is necessary to coordinate the synchronization signal burst set transmission and measurement configuration of the relay node. As a set of synchronization signals can be considered a set of one or more SSBs. The transmission and measurement of the set of synchronization signal bursts to the relay node may be considered as the transmission and measurement of one or more SSBs. The following description will therefore take the transmission and measurement of SSBs as an example.

Fig. 5 is a schematic diagram of an SSB transmission method. As shown in fig. 5, a relay node needs to send two SSBs, one of which is used for synchronization, discovery or measurement of an access link or used by a terminal to synchronize, discover or measure the relay node, i.e., "AC-SSB" in the figure; another kind is used for synchronization, discovery or measurement of backhaul links or for other relay nodes or base stations to perform synchronization, discovery or measurement, i.e., "BH-SSB" in the figure. The two SSBs are each independently configured. For convenience of understanding, the SSB transmitted by the relay node for terminal measurement is called an AC-SSB, and denotes an SSB for an access link. Where AC denotes access (access). Similarly, SSBs sent by a relay node for other relay node or base station measurement are called BH-SSBs, which indicate SSBs used for the backhaul link. Where BH represents backhaul. It should be noted that such nomenclature is used for convenience of description, and different names do not necessarily represent that their signal generation manner and resource mapping manner are different. In order to avoid the collision of the SSB transmission and measurement of different relay nodes, the transmission times of different relay nodes are orthogonal. That is, the transmission time of the SSB for the backhaul link of the relay node 1 in fig. 5 does not overlap with the transmission time of the SSB for the backhaul link of the relay node 2. This has the advantage that since different relay nodes transmit SSBs at different times, any one relay node can perform measurement at the time when other relay nodes transmit SSBs, and no collision of the SSBs occurs.

However, this scheme has a large measurement overhead. For a particular relay node, if N other relay nodes are to be measured, a total of N measurements are required since the SSB transmission times are orthogonal. Because beam scanning is required when the relay nodes are synchronized, discovered or measured, for some relay nodes, it cannot transmit uplink and downlink data channels simultaneously within the time of the measurement window. For example: when the relay node is performing pilot frequency measurement, due to the capability limitation of the radio frequency device, the relay node cannot perform data transceiving at the original working frequency point. This results in a long period of time during which data transmission is not possible, thus causing a large waste.

Fig. 6 is a signal transmission method according to an embodiment of the present disclosure. The method configures the receiving and sending SSBs, so that the relay nodes can perform mutual synchronization, discovery or measurement without bringing large measurement overhead or signaling overhead. The method can be applied to a communication system with the relay node, and particularly can support the scenes of multi-hop and multi-connection relay. The method comprises the following steps.

Step 601: the relay node determines time resource information for transmitting the first signal, the time resource information comprising one or more time resources.

The first signal may be SSB, or may be other signals used for synchronization or measurement, and the processing manner in the embodiment of the present application is similar, which is not limited to this embodiment of the present application. The one or more time resources are time resources that are occupied by transmitting the first signal. The following description will be given taking an example in which the first signal is SSB.

FIG. 7 is a diagram illustrating resource locations for SSBs sent by multiple nodes. One shaded rectangular block in fig. 7 represents one or more SSBs. The one or more SSBs are repeatedly transmitted at a certain period. The one or more SSBs may form a set of synchronization signal bursts in the manner of fig. 3. Similarly, when one rectangular block with shading in fig. 7 represents one synchronization signal burst set, the time resource occupied by the synchronization signal burst set (in the NR system, the time is not more than 5 ms) is repeated at a certain cycle. Fig. 7 shows resource locations of four nodes, namely, a base station, a relay node 1, a relay node 2, and a relay node 3, for transmitting SSBs. Taking the relay node 1 as an example, fig. 7 shows time resources, for example, time resources 1 to 5, occupied by the relay node 1 to send the SSB.

In order to facilitate the measurement of the terminal, the SSB transmission resources of the four relay nodes in fig. 7 need to be periodically overlapped or partially overlapped. The dashed boxes in fig. 7 represent the measurement windows of the terminal. In this embodiment, the terminal is configured with two measurement windows having different periods but the same length and offset.

In order to ensure that the measurement of the access link of the terminal is not affected, the base station always ensures that the SSB in the measurement window of the terminal is normally transmitted. Therefore, the measurement window period of the terminal can be made larger than the SSB transmission period of the relay node through the configuration of the network, so that SSBs that do not fall within the measurement window of the terminal (i.e., SSBs of the relay nodes 1 to 3 that are not within the dashed line frame in fig. 7) can be used for synchronization, discovery, or measurement between the relay nodes. The configuration of the measurement window of the terminal may be implemented by a network entity (e.g., a donor base station) sending a control signaling to the relay node. For the base station, it does not need to discover or measure other relay nodes, so synchronization, discovery or measurement between relay nodes has no influence on the SSB transmission of the base station.

Optionally, the time resource information for sending the first signal is configured to the relay node by the upper node through an RRC message.

Step 602: the relay node receives configuration signaling from the superordinate node, the configuration signaling including information for configuring a measurement window of the relay node. Wherein the information of the measurement window comprises at least one of: the period of the measurement window, the length of the measurement window, and the offset of the measurement window. Further, the first time resource of the one or more time resources used by the relay node for transmitting the first signal and the time resource corresponding to the measurement window are all overlapped or partially overlapped.

The upper node is a node that can provide services for the lower node and can perform a certain control function (e.g., data scheduling, beam management, power control, etc.) on the lower node. Generally, an upper node is closer to a core network or a control center than a lower node thereof, that is, in a downlink transmission process from a base station to a terminal, data generally passes through the upper node and then passes through the lower node of the node. In some cases, an upper node may also be referred to as an upstream node and a lower node may also be referred to as a downstream node. In this step, the upper node may be a base station or other relay node that can configure the relay node.

The configuration signaling may indicate a measurement window during which the relay node synchronizes, discovers, or measures other relay nodes. The measurement window of the relay node is overlapped with the time resource which is originally used for sending the first signal or partially overlapped with the time resource. This corresponds to taking a portion of the time resource originally used for transmitting the first signal out for synchronization, discovery, or measurement of other relay nodes, and not using this portion of the time resource to transmit the first signal.

Fig. 8 is a schematic diagram of a measurement window of a relay node. As shown in fig. 8, mutual synchronization, discovery, or measurement between relay nodes may use SSB that is not configured in the measurement window of the terminal for measurement. Specifically, taking the relay node 1 as an example, the superordinate node may configure signaling to the relay node 1. The configuration signaling includes configuration information for instructing the relay node 1 to measure SSBs of other relay nodes. In particular, the configuration signaling comprises one or more parameters of a measurement window (which may be considered as a period of time resource or time window) in which the relay node 1 performs SSB measurements. The one or more parameters include a length of the measurement window, a period of the measurement window, and an offset of the measurement window. Alternatively, the measurement window of the relay node 1 may overlap or partially overlap with its time resource transmitting the SSB. For example. The measurement window of the relay node 1 in fig. 8 overlaps with the time resource 2. When the overlap of the measurement window of the relay node and the time resource for transmitting the SSB occurs, the relay node may perform the SSB measurement without transmitting the SSB for the overlapped time or transmit the SSB without performing the SSB measurement for the overlapped time. In the present embodiment, the former method may be adopted. This is because: as shown in fig. 8, since the SSB transmission time of different relay nodes will overlap regularly (for example, in fig. 8, the relay node 2 and the relay node 3 also transmit SSBs on the time resource 2), the superordinate node may configure the measurement window of the relay node to overlap with its SSB transmission window, so that the relay node can measure the SSB signals of a plurality of other relay nodes within one measurement window. This reduces the overhead of the measurement as a whole. As shown in fig. 8, by coordinating the measurement window of the terminal with the measurement window of the relay node, the measurement window of the relay node does not overlap with the SSB measurement window of the terminal. Therefore, the SSB in the measurement window of the terminal still can normally transmit, and thus, the terminal is not affected.

Step 603: and the relay node receives the second signal in the time resource corresponding to the measurement window.

Specifically, the relay node receives a second signal from a relay node adjacent to the relay node. The second signal may be SSB or other signal used for synchronization or measurement. Since the first time resource overlaps with the measurement window of the relay node, the relay node does not transmit the first signal at the time when the first time resource overlaps with the measurement window of the relay node, or the relay node does not transmit the first signal at the entire first time resource.

Time resource 2 of relay node 1 in fig. 8 is originally used for transmitting the SSB. When the measurement window of the relay node 1 overlaps with the time resource 2, the time resource 2 is no longer used to transmit the SSB, but is used to synchronize, discover, or measure other relay nodes. That is to say, the relay node 1 receives the SSBs sent by other relay nodes on the time resource corresponding to the measurement window, so as to synchronize, discover or measure the relay node that sends the SSBs.

For convenience of understanding, the SSB transmitted by the relay node for terminal measurement is called an AC-SSB, and denotes an SSB for an access link. Where AC denotes access (access). Similarly, SSBs sent by a relay node for measurement by other relay nodes are called BH-SSBs, which indicate SSBs used for backhaul links. Where BH denotes backhaul. It should be noted that such nomenclature is used for convenience of description, and different names do not necessarily represent that their signal generation manner and resource mapping manner are different.

Fig. 9 is a schematic diagram of SSB transmission of a relay node. One relay node may transmit two kinds of SSBs including AC-SSB and BH-SSB. The two types of SSBs may take the form of frequency division multiplexing to reduce the impact of the SSB measurements on the terminal. As shown in fig. 9, for one relay node, the AC-SSB is mapped on frequency location F1, and the BH-SSB is mapped on frequency location F2. Furthermore, the time resources occupied by the two types of SSBs have different offsets so that they do not overlap in time. The benefit of this is that: if the two types of SSBs do not perform frequency division multiplexing and both the two types of SSBs transmit on the F1 frequency, the terminal may measure the BH-SSBs on the F1 frequency. If the beam of the BH-SSB and the beam on the AC-SSB do not satisfy a quasi co-location (QCL) relationship, a measurement error of the terminal will result. If the two types of SSBs are not time division multiplexed, the time resources occupied by the two types of SSBs may overlap. Then when the relay node measures other relay nodes in its measurement window, it can no longer transmit SSBs. This will adversely affect the measurement of the terminal.

Fig. 10 is a schematic diagram of SSB transmission of another relay node. The "AC-SSB" and "BH-SSB" described above can be considered to represent a complete set of synchronization signal bursts. As shown in fig. 10, the AC-SSB and BH-SSB occupy only a portion of the SSB in a burst set of synchronization signals, respectively. Thus, the measurement window of the relay node will partially or fully overlap the time resources used for transmitting the BH-SSBs in the synchronization signal burst set. Take relay node 1 in fig. 10 as an example. The measurement window of the relay node 1 overlaps the BH-SSB in one synchronization signal burst set it transmits. However, the measurement window of the relay node 1 does not overlap with the AC-SSB in one burst set of synchronization signals it transmits. That is, even in one synchronization signal burst set, the time resource in which the BH-SSB was originally transmitted can be taken out to synchronize, discover, or measure other relay nodes. However, the measurement window of the relay node still does not occupy the time resources originally used for transmitting the AC-SSB. Therefore, the influence on the terminal can be avoided as much as possible, and the synchronization, discovery or measurement of other relay nodes can be realized.

In some cases, if the measurement window configured by the upper node for the relay node is completely or partially overlapped with the time resource corresponding to the AC-SSB, the relay node still transmits the AC-SSB on the overlapped time resource. Further, the relay node does not receive the BH-SSBs transmitted by other relay nodes or the base station. That is, the relay node does not perform measurement of BH-SSB at this time. Optionally, the relay node reports to the superordinate node that the measurement is invalid or no measurement is made.

By the method provided by the embodiment of the application, the measurement overhead can be reduced. For example, if the SSB transmission method of fig. 5 is used, for a specific relay node, if N other relay nodes are to be measured, N measurements are required in total because the SSB transmission times are orthogonal. Because beam scanning is required when relay nodes are synchronized, discovered or measured, for some relay nodes, it cannot simultaneously transmit uplink and downlink data channels within the time of the measurement window, for example: when the relay node is performing pilot frequency measurement, due to the capability limitation of the radio frequency device, the relay node cannot perform data transceiving at the original working frequency point. This would result in a large waste. The method provided by the embodiment of the application can measure N other relay nodes. The scenario shown in e.g. fig. 7 or fig. 8 is easily extended to N relay nodes. For a certain relay node, for example, the relay node 1 in fig. 7, it may measure other relay nodes within one measurement window without separately measuring for each relay node. This can greatly reduce the measurement overhead.

The embodiment of the application also provides a SSB transmission method. The method comprises generating a BH-SSB; the BH-SSB is sent. The method further includes generating an AC-SSB; the BH-SSB is sent. The BH-SSB is generated in two ways:

the first mode is as follows: the same signal generation method as AC-SSB is used. Specifically, signal generation for BH-SSB may include several aspects as follows.

The PSS sequence in BH-SSB is a pseudo random sequence with the length of 127, and the generation mode is as follows:

wherein

It contains a part of the information of the cell ID; x (i + 7) = (x (i + 4) + x (i)) mod2 and [ x (6) x (5) x (4) x (3) x (2) x (1) x (0))]＝[1 1 1 0 1 1 0]

The SSS sequence in BH-SSB is a pseudo random sequence with length of 127, and the generation mode is as follows:

wherein the content of the first and second substances,

it contains another part of the information of the cell ID, it and

cell ID is jointly determined, i.e.

Further:

and is provided with

The second mode is as follows: a special BH-SSB generation method is used, which is different from the AC-SSB generation method.

As an optional scheme, the second manner may avoid the terminal detecting the BH-SSB signal, so that the configuration of the BH-SSB may be more flexible. For example: the relay node can change the beam of the BH-SSB, close (or stop) the transmission of the BH-SSB for a certain time or change the sending period of the BH-SSB, and the measurement of the terminal cannot be influenced. In particular, the differences in BH-SSB and AC-SSB that result from specialized BH-SSB generation methods can be embodied in one or more of the following aspects.

(1) The location of the time resource or frequency resource of the BH-SSB is not on the candidate location of the AC-SSB. For example, the frequency location of a BH-SSB is not on the synchronization signal grid (raster) specified by the standard.

(2) The primary synchronization sequence in a BH-SSB is different from the primary synchronization sequence in an AC-SSB. In general, the primary synchronization sequence contains a total of three different sequences, which are generated using a portion of the bits of the cell ID. To avoid the terminal resolving to the BH-SSB, three new sequences may be defined as the primary synchronization sequences for the backhaul link. They are different from the three primary synchronization sequences used for terminal measurement, but may correspond one-to-one, for example: the new sequence 1 corresponds to the original sequence 1; the new sequence 2 corresponds to the original sequence 3; the new sequence 3 corresponds to the original sequence 3, which means that they contain the same cell ID information. Therefore, the relay node will not be affected to calculate the cell ID. Of course, the secondary synchronization sequences in BH-SSB and AC-SSB can be made different. Specifically, the three new sequences are orthogonal or have low correlation with the original three sequences.

For example, the new PSS sequence is still based on the above-described way of generating the PSS sequence, but the way of computing m is modified, i.e.:

where Δ represents an integer offset. Optionally, the value of Δ is agreed in the protocol and may be one of 20, 21, 22, or 23. The values can ensure that the interval between the new value of 3 m after adjustment and the original value of 3 m is relatively uniform, and mutual interference can be controlled. Alternatively, the value of Δ may be notified to the relay node by the upper node, instead of being set to a specific value.

Similarly, the SSS sequence can also be used in this way to generate new sequences for BH-SSB. Instant game

And/or

(3) The broadcast channel in the BH-SSB is coded differently than the broadcast channel in the AC-SSB. The method specifically comprises the following steps: the source bits of the broadcast channels are different; the scrambling codes of the broadcast channels are different (or the scrambling modes of the broadcast channels are different); or the addition mode of the CRC check code of the broadcast channel is different.

Based on the same inventive concept, the embodiment of the application also provides a signal transmission device. The apparatus may be configured to perform the method performed by the relay node in the above method embodiment.

Fig. 11 is a schematic diagram of a signal transmission apparatus according to an embodiment of the present application. Referring to fig. 11, the signal transmission apparatus 1100 includes a processing module 1101 and a receiving module 1102. Specifically, each module may have a structure that realizes the following functions.

A processing module 1101, configured to determine time resource information for transmitting the first signal, where the time resource information includes one or more time resources.

A receiving module 1102, configured to receive configuration signaling from a superior node, where the configuration signaling includes information for configuring a measurement window of the apparatus, and the information of the measurement window includes at least one of the following: the period of the measurement window, the length of the measurement window, and the offset of the measurement window, wherein a first time resource of the one or more time resources and a time resource corresponding to the measurement window are all overlapped or partially overlapped. It should be noted that in some cases, the terminal may also need to function as a relay. Thus, the device may also be a terminal.

The device further includes a sending module 1103, where the sending module 1103 is configured to not send the first signal on a time resource where the first time resource and the time resource corresponding to the measurement window are completely overlapped or partially overlapped. The first signal is not transmitted on the overlapped time resource, so that the saved time resource is used for receiving the second signal, and the relay node can synchronize, discover or measure other relay nodes or base stations transmitting the second signal according to the second signal. Additionally, the relay node may also transmit the first signal on a second time resource of the one or more time resources.

Optionally, the first signal comprises a first synchronization signal block SSB and a second SSB. Wherein the first SSB is used for synchronization, discovery or measurement of a backhaul link, and the second SSB is used for synchronization, discovery or measurement of an access link. It should be noted that the relay node may communicate with the superordinate node in the role (or identity) of the terminal in some cases, for example, when the backhaul link has quality problem or initial access, the relay node may also use the second SSB for synchronization, discovery or measurement in this case.

Optionally, the completely overlapping or partially overlapping of the first time resource in the one or more time resources and the time resource corresponding to the measurement window includes: and the time resource used for transmitting the first SSB in the first time resource is completely or partially overlapped with the time resource corresponding to the measurement window. When the first time resource is used for carrying both the first SSB and the second SSB, a part of the first time resource used for carrying the first SSB may be taken out for receiving the second signal, so as to implement synchronization, discovery, or measurement for other relay nodes or base stations.

Optionally, the first and second SSBs are mapped on different frequency resources; or the primary synchronization signal PSS sequences in the first SSB and the second SSB are different; or the scrambling codes or Cyclic Redundancy Check (CRC) codes of the physical broadcast channels in the first SSB and the second SSB are different.

Optionally, the receiving module is further configured to receive a second signal from a relay node adjacent to the apparatus. The second signal may be used for synchronization, discovery or measurement of a neighboring relay node.

The apparatus provided by the embodiment of the present application may be used for synchronization, discovery, or measurement of one or any multiple relay nodes or base stations. Its scalability is very good. In addition, the required configuration is relatively simple.

It should be noted that the signal transmission apparatus 1100 may be configured to perform the method performed by the relay node in the foregoing method embodiment, and reference may be made to the related description of the foregoing method embodiment for implementation and technical effects thereof that are not described in detail in the signal transmission apparatus 1100.

Based on the same inventive concept, the embodiment of the application also provides a signal transmission device. The apparatus may be used for the method performed by the upper node in the above method embodiments.

Fig. 12 is a schematic diagram of a signal transmission apparatus according to an embodiment of the present application. Referring to fig. 12, the signal transmission apparatus 1200 includes a processing module 1201 and a transmitting module 1202. Specifically, each module may have a structure that realizes the following functions.

A processing module 1201, configured to generate a configuration signaling.

A sending module 1202, configured to send a configuration signaling to a relay node, where the configuration signaling includes information for configuring a measurement window of the relay node, and the information of the measurement window includes at least one of the following: the relay node is configured to send a first signal to a first relay node, where the first time resource of one or more time resources used for sending the first signal overlaps with a time resource corresponding to the measurement window.

The signal transmission apparatus 1200 enables the relay node to receive the second signal in the time resource corresponding to the measurement window.

It should be noted that the signal transmission apparatus 1200 may be configured to execute the method executed by the upper node in the above method embodiment, and reference may be made to the related description of the above method embodiment for implementation and technical effects thereof that are not described in detail in the signal transmission apparatus 1200.

Based on the same inventive concept, the embodiment of the application also provides a signal transmission device. The signal transmission means may be adapted to transmit the SSB.

Fig. 13 is a schematic diagram of a signal transmission apparatus according to an embodiment of the present application. Referring to fig. 13, the signal transmission apparatus 1300 includes a sending module 1301 and a processing module 1302. Specifically, each module may have a structure that realizes the following functions.

A sending module 1301, configured to send a first SSB and a second SSB, where the first SSB is used for synchronization of a backhaul link, and the second SSB is used for synchronization of an access link.

The signal transmission apparatus 1300 further includes a processing module 1302 for generating the first SSB and the second SSB. The signal transmission apparatus 1300 may be a relay node. In some cases, it may also be a terminal.

Wherein the first SSB and the second SSB are mapped on different frequency resources; or the primary synchronization signal PSS sequences in the first SSB and the second SSB are different; or the scrambling codes or Cyclic Redundancy Check (CRC) codes of the physical broadcast signals in the first SSB and the second SSB are different.

It should be noted that the signal transmission apparatus 1300 may be configured to perform the method in the foregoing method embodiment, and reference may be made to the related description of the foregoing method embodiment for implementation and technical effects thereof that are not described in detail in the signal transmission apparatus 1300.

Based on the same inventive concept, the embodiment of the present application further provides a signal transmission apparatus, which may be used to perform the method in the foregoing method embodiment.

Fig. 14 is a schematic diagram of a signal transmission apparatus according to an embodiment of the present application. Referring to fig. 14, the apparatus 1400 includes at least one processor 1401, configured to implement the functions of each node in the signal transmission method provided in the embodiment of the present application. The apparatus 1400 may also include at least one memory 1402 for storing program instructions and/or data. A memory 1402 is coupled to the processor 1401. The processor 1401 may cooperate with the memory 1402. Processor 1401 may execute program instructions stored in memory 1402. At least one of the at least one memory 1402 may be included in the processor 1401.

A communication interface 1403 may also be included in the apparatus 1400, and the apparatus 1400 may perform information interaction with other devices through the communication interface 1403. Communication interface 1403 may be a circuit, bus, transceiver, or any other device that can be used for information interaction. The other device may be a base station, a terminal or a relay node, for example. The processor 1401 can transceive data using a communication interface 1403, the communication interface 1403 being used for transceiving data with other nodes, for example.

The embodiment of the present application does not limit the specific connection medium between the communication interface 1403, the processor 1401, and the memory 1402. In the embodiment of the present application, the memory 1402, the processor 1401, and the communication interface 1403 are connected by a bus in fig. 14, the bus is represented by a thick line in fig. 14, and the connection manner between other components is merely illustrative and not limited. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 14, but this is not intended to represent only one bus or type of bus.

The embodiment of the present application further provides a chip, where the chip is used to support the apparatus 1400 to implement the method in the foregoing method embodiment. Further, 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 method provided by any one of the first aspect to the third aspect or any one of the designs of any one of the first aspect to the third aspect.

An embodiment of the present application provides a chip, where the chip includes a processor and a memory, and the processor is configured to read a software program stored in the memory to implement the method provided in any one of the first aspect to the third aspect or any design of any one of the first aspect to the third aspect.

The present application provides a computer program product containing instructions, which when run on a computer, causes the computer to perform the method of the above method embodiments.

The embodiment of the present application further provides a computer-readable storage medium, which is used for storing computer software instructions required to be executed for executing the processor, and which contains a program required to be executed for executing the processor.

In addition, the embodiment of the application also provides a communication system. The communication system includes the signal transmission apparatus 1100 and the signal transmission apparatus 1200.

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 application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks. These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to be performed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), among others.

Claims

1. A signal transmission method, comprising:

the relay node determines time resource information for transmitting a first signal, wherein the time resource information comprises one or more time resources; the first signal comprises a first synchronization signal block, SSB, used for synchronization, discovery, or measurement of a backhaul link and a second SSB, used for synchronization, discovery, or measurement of an access link;

the relay node receives configuration signaling from a superior node, the configuration signaling including information for configuring a measurement window of the relay node, the information of the measurement window including at least one of: the period of the measurement window, the length of the measurement window, and the offset of the measurement window, wherein a first time resource of the one or more time resources and a time resource corresponding to the measurement window are all overlapped or partially overlapped; wherein the whole overlapping or partial overlapping of the first time resource in the one or more time resources and the time resource corresponding to the measurement window comprises: the time resource used for transmitting the first SSB in the first time resource is completely or partially overlapped with the time resource corresponding to the measurement window;

and the relay node receives a second signal in the time resource corresponding to the measurement window.

2. The method of claim 1, comprising:

and the relay node does not send the first signal on the time resource where the first time resource and the time resource corresponding to the measurement window are completely or partially overlapped.

3. The method of claim 1,

the first SSB and the second SSB are mapped on different frequency resources; or alternatively

The primary synchronization signal PSS sequences in the first SSB and the second SSB are different; or

The scrambling code or cyclic redundancy check, CRC, code of the physical broadcast channel in the first SSB and the second SSB are different.

4. The method according to any one of claims 1 to 3,

the relay node receives a second signal from a relay node adjacent to the relay node.

5. A signal transmission apparatus, comprising:

a processing module, configured to determine time resource information for transmitting a first signal, where the time resource information includes one or more time resources; the first signal comprises a first synchronization signal block, SSB, and a second SSB, the first SSB being used for synchronization, discovery, or measurement of a backhaul link, the second SSB being used for synchronization, discovery, or measurement of an access link;

a receiving module, configured to receive configuration signaling from a superior node, the configuration signaling including information for configuring a measurement window of the apparatus, the information of the measurement window including at least one of: measuring a period of a window, a length of the window, and an offset of the window, wherein a first time resource of the one or more time resources and a time resource corresponding to the window are completely overlapped or partially overlapped; wherein the whole overlapping or partial overlapping of the first time resource in the one or more time resources and the time resource corresponding to the measurement window comprises: the time resource used for transmitting the first SSB in the first time resource is completely or partially overlapped with the time resource corresponding to the measurement window;

the receiving module is further configured to receive a second signal in a time resource corresponding to the measurement window.

6. The apparatus of claim 5, further comprising a transmitting module;

the sending module is configured to not send the first signal on a time resource where the first time resource and the time resource corresponding to the measurement window are completely overlapped or partially overlapped.

7. The apparatus of claim 5,

the first SSB and the second SSB are mapped on different frequency resources; or

8. The apparatus according to any one of claims 5 to 7,

the receiving module is further configured to receive a second signal from a relay node proximate to the apparatus.

9. A signal transmission apparatus, comprising: a transceiver, a memory and a processor, wherein the memory is used for storing program codes required to be executed by the processor, the transceiver is used for transmitting and receiving data, and the processor is used for executing the program codes stored in the memory to realize the method according to any one of claims 1-4.

10. A computer readable storage medium storing computer software instructions which, when executed, implement the method of any one of claims 1 to 4.