WO2019214487A1

WO2019214487A1 - Signal transmission method and device

Info

Publication number: WO2019214487A1
Application number: PCT/CN2019/085013
Authority: WO
Inventors: 陈磊; 刘凤威; 邱晶
Original assignee: 华为技术有限公司
Priority date: 2018-05-11
Filing date: 2019-04-29
Publication date: 2019-11-14
Also published as: CN110475309A; CN110475309B

Abstract

Embodiments of the present application provide a signal transmission method, comprising: a relay node determines time resource information for sending a first signal, the time resource information comprising one or more time resources; the relay node receives configuration signaling from an upper level node, the configuration signaling comprising information for configuring a measurement window of the relay node, the information of the measurement window comprising one of a period of the measurement window, the length of the measurement window, and an offset of the measurement window, a first time resource in the one or more time resources totally or partially overlapping a time resource corresponding to the measurement window; the relay node receives a second signal within the time resource corresponding to the measurement window. The method provided by the embodiments of the present application can reduce measurement overheads.

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 technique

A relay technology is introduced in a long term evolution (LTE) system. By deploying a relay node (RN) in the network to forward data between the base station and the terminal, the relay technology can achieve the purpose of enhancing the network capacity and solving the coverage dead zone. FIG. 1 is a schematic diagram of a network topology of a relay scenario. As shown in FIG. 1, the link between the base station and the relay node is called a backhaul link, the link between the relay node and the terminal, and the link between the base station and the terminal are called an access link.

In next-generation communication systems (such as 5G systems), relay technology will still be supported. In 5G systems, an important feature of relay technology is support for multi-hop transmission and multi-connection transmission. 2 is a schematic diagram of a network topology of another relay scenario. As shown in Figure 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 the lower node of the relay node 1, it is a multi-hop relay structure between the base station and the base station. On the other hand, if the relay node 2 and other base stations have established a connection, the relay node 1 can also access the relay node 2 and become the lower node of the relay node 2. This structure is a multi-connection relay structure for the relay node 1. That is, the relay node 1 and the base station and the relay node 2 have a connection at the same time.

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

Summary of the invention

The embodiment of the present application provides a signal transmission method and device, which are used to implement a relay node to receive signals of other relay nodes, so that the relay node can perform discovery and measurement on other relay nodes.

In a first aspect, an embodiment of the present application provides a signal transmission method, including: a relay node determines time resource information for transmitting a first signal, where the time resource information includes one or more time resources; The upper node receives configuration signaling, 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: a period of the measurement window, a length of the measurement window, Measure an offset of the window, the first time resource of the one or more time resources and the time resource corresponding to the measurement window all overlap or partially overlap; the relay node corresponds to the measurement window The second signal is received within the time resource. 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.

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

In a possible design, the relay node does not send the first signal on the time resource in which the first time resource and the time resource corresponding to the measurement window all overlap or partially overlap. Not transmitting the first signal on the overlapping time resources, so that the saved time resource is used to receive the second signal, so that the relay node can synchronize the other relay nodes or base stations that send the second signal according to the second signal. , discovery or measurement. Additionally, the relay node can also transmit the first signal on the second time resource of the one or more time resources.

In one possible design, the first signal includes a first sync signal block SSB and a second SSB. 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 in some cases, the relay node communicates with the superior node in the role (or identity) of the terminal, for example, when the quality of the backhaul link occurs or the initial access occurs, the relay node also uses the relay node. The second SSB performs synchronization, discovery or measurement.

In a possible design, the first time resource of the one or more time resources and the time resource corresponding to the measurement window all overlap or partially overlap: the first time resource is used for transmission The time resources of an SSB and the time resources corresponding to the measurement window all overlap or partially overlap. When the first time resource is used to carry the first SSB and the second SSB, the part of the time resource in the first time resource for carrying the first SSB may be used for receiving the second signal. To achieve synchronization, discovery or measurement of other relay nodes or base stations. The relay node sends the second SSB when all the time resources for transmitting the second SSB and the time resources corresponding to the measurement window overlap or partially overlap. 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 a possible design, the first SSB and the second SSB are mapped on different frequency resources; or the primary synchronization signal PSS sequence in the first SSB and the second SSB is different; The scrambling code or cyclic redundancy check CRC code of the physical broadcast channel in the first SSB and the second SSB is different.

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

The method provided by the embodiments of the present application may 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 configuration required for this method is relatively simple.

In a second aspect, the embodiment of the present application provides a signal transmission method, including: a higher-level node generates configuration signaling; the upper-level node sends configuration signaling to a relay node, where the configuration signaling includes configuring a relay node. Information of the measurement window, the information of the measurement window comprising at least one of: a period of the measurement window, a length of the measurement window, an offset of the measurement window, the relay node is configured to transmit one of the first signals or The first time resource of the plurality of time resources and the time resource corresponding to the measurement window all overlap or partially overlap. The method causes the relay node to receive a second signal within a 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.

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

The first SSB and the second SSB are mapped on different frequency resources; or the primary synchronization signal PSS sequence in the first SSB and the second SSB is different; or the first SSB and the The scrambling code or cyclic redundancy check CRC code of the physical broadcast signal in the second SSB is different.

In a fourth aspect, the embodiment of the present application provides a signal transmission apparatus, including: 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; and a receiving module, Receiving configuration signaling from a superior node, the configuration signaling including information for configuring a measurement window of the device, the information of the measurement window including at least one of: a period of the measurement window, a length of the measurement window, Measuring an offset of the window, the first time resource of the one or more time resources and the time resource corresponding to the measurement window all overlapping or partially overlapping; the receiving module is further configured to be in the measurement window The second signal is received within the corresponding time resource. The device can be a relay node. It should be noted that in some cases, the terminal may also need to function as a relay. Therefore, the device can also be a terminal.

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

In a possible design, the device further includes a sending module, where the sending module is configured not to send the time resource in which the first time resource and the time resource corresponding to the measurement window overlap or partially overlap. The first signal. Not transmitting the first signal on the overlapping time resources, so that the saved time resource is used to receive the second signal, so that the relay node can synchronize the other relay nodes or base stations that send the second signal according to the second signal. , discovery or measurement. Additionally, the relay node can also transmit the first signal on the second time resource of the one or more time resources.

In a possible design, the first time resource of the one or more time resources and the time resource corresponding to the measurement window all overlap or partially overlap: the first time resource is used for transmission The time resources of an SSB and the time resources corresponding to the measurement window all overlap or partially overlap. When the first time resource is used to carry the first SSB and the second SSB, the part of the time resource in the first time resource for carrying the first SSB may be used for receiving the second signal. To achieve synchronization, discovery or measurement of other relay nodes or base stations.

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

The apparatus provided in this embodiment of the present application may 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, the embodiment of the present application provides a signal transmission apparatus, including: a processing module, configured to generate configuration signaling, and a sending module, configured to send configuration signaling to a relay node, where the configuration signaling is used to And configuring information of the measurement window of the relay node, where the information of the measurement window includes at least one of: a period of the measurement window, a length of the measurement window, an offset of the measurement window, and the relay node is configured to send the first The first time resource of the one or more time resources of the signal and the time resource corresponding to the measurement window all overlap or partially overlap. The apparatus causes the relay node to receive a second signal within a time resource corresponding to the measurement window.

In a sixth aspect, the 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 Used for synchronization of access links. The apparatus also includes a processing module for generating the first SSB and the second SSB. The device can be a relay node. In some cases, it can also be a terminal.

In a seventh aspect, an embodiment of the present application provides a transmission apparatus, including: a transceiver, a memory, and a processor, where the memory is used to store program code that is required to be executed by the processor. The transceiver is used for data transmission and reception between the device and other devices, such as relay nodes and superior nodes, relay nodes, and other relay nodes. The processor is configured to execute the program code stored in the memory, and is specifically for performing the method described in any one of the first aspect to the third aspect.

In an eighth aspect, the embodiment of the present application further provides a computer readable storage medium, configured to store a computer used to perform the function designed by any one of the foregoing aspects to any one of the first aspect to the third aspect A software instruction comprising a program designed to perform any of the designs of any one or any of the first to third aspects above.

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

In a tenth aspect, an embodiment of the present application provides a chip, where the chip is connected to a memory, for reading and executing a software program stored in the memory, to implement any one of the first aspect to the third aspect or A method provided by any of any of the aspects.

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

DRAWINGS

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

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

3 is a schematic diagram of a synchronization signal burst set;

4 is a schematic diagram of a measurement window of a terminal;

FIG. 5 is a schematic diagram of a SSB transmission mode;

FIG. 6 is a signal transmission method according to an embodiment of the present application;

7 is a schematic diagram of a resource location where multiple nodes send SSBs;

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

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

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

Embodiments of the present application can be applied to a communication system including a 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 5G (5 ^th generation). Communication systems such as systems can also be extended to systems such as wireless fidelity (WiFi) systems and worldwide interoperability for microwave access (wimax) systems.

Illustratively, a communication system including a relay node may be as shown in FIG. 1 or 2. In FIG. 2, the base station can provide services for the relay node 1 and the relay node 2. The terminal 1 can establish a communication connection with the base station through the relay node 1. Terminal 2 can establish a communication connection directly with the base station. The relay node 2 can establish a communication connection with the base station through the relay node 1.

The base station may be an ordinary base station (such as a Node B or an eNB), a new radio controller (NR controller), a gNode B (gNB) in a 5G system, a centralized network unit, a new wireless unit. The base station, the radio remote module, the micro base station, the distributed network unit, the transmission reception point (TRP), or the transmission point (TP) or any other wireless access device, this embodiment of the present application Not limited to this.

The terminal may be a device having a communication function with a base station and a relay node, or a device providing voice and/or data connectivity to a user. For example, the terminal may be a handheld device having a wireless connection function, an in-vehicle device, or the like. Common terminals include, for example, mobile phones, tablets, notebook computers, PDAs, mobile internet devices (MIDs), wearable devices such as smart watches, smart bracelets, pedometers, and the like. A terminal may also be referred to as a user equipment (UE).

A relay node is a network device that provides services such as data connections for terminals or next-level relay nodes. In the NR system, the relay node may be named rTRP (relay TRP), integrated access and backhaul (IAB) nodes, and the like. Unlike a general network device, a relay node is connected to a base station or other relay node through a backhaul link. In addition, in some scenarios, the terminal can also act as a relay node. The relay mode in which the access link and the backhaul link share the frequency band may be referred to as an inband relay, and the relay node operating according to the relay mode may be referred to as an inband relay node.

In a 5G system, a synchronization signal block (SSB) can be used to implement initial synchronization and cell discovery. It should be noted that the SSB can also refer to a synchronization signal/physical broadcast channel block (SS/PBCH Block). Figure 3 is a schematic diagram of a synchronization signal burst set. As shown in FIG. 3, the synchronization signal burst set includes one or more SSBs. Each SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel, occupying a total of four orthogonal frequency division multiplexing (OFDM) symbols. . The synchronization signal burst set is periodically repeated.

In the high frequency band, in order to improve coverage, communication between the base station and the terminal is usually transmitted through a narrow beam. Since both the base station and the terminal have multiple beams, the quality of the signal transmission can be better ensured only when the transmitting beam of the base station and the receiving beam of the terminal are aligned. The 5G system utilizes a synchronization signal burst set to guarantee performance in high frequency bands. A sync signal burst set contains up to 64 SSBs. Usually, the duration of a synchronization signal burst set does not exceed 5 ms, and the shortest transmission period is also 5 ms. The base station performs transmission beam scanning within the coverage of the cell through these SSBs. In the terminal, multiple sets of synchronization signal bursts need to be scanned by multiple receiving beams, thereby completing alignment of the transmitting and receiving beams and downlink synchronization. The following line transmission is taken as an example. The base station has M transmit beams and the terminal has N receive beams. In order to complete beam alignment, the base station can use different transmit beams when transmitting each SSB, and complete scanning of all M transmit beams through multiple SSBs in a burst of synchronization signals. The scanning of the M transmit beams here means traversing the M transmit beams (or sequentially transmitting the SSBs using M transmit beams). For the terminal, it can use the same receiving beam to receive and measure the entire synchronization signal burst set, and replace the receiving beam to perform measurement of multiple synchronization signal burst sets to complete the scanning of the receiving beam. The terminal selects the best result from the M*N SSB measurements, and its corresponding base station transmit beam and terminal receive beam can be considered as aligned beam pairs. And the synchronization timing corresponding to the result can be regarded as the downlink timing corresponding to the beam pair. After the above synchronization is completed, the terminal can 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 it to the base station, and the base station performs beam management or mobility management according to the measurement information. In summary, the SSB can be used for synchronization, discovery or measurement of a cell or base station or relay node.

In mobility measurements, it can be configured with one or two measurement windows for a particular terminal. The measurement window characterizes a time period for performing an SSB measurement. 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 sub-frames. Let the period of the measurement window be T subframes, and the offset of the measurement window be N subframes, then N may be an integer from 0 to T-1. The length of the measurement window is several (for example, 1-5) subframes. The terminal may use a subframe that satisfies the following condition as the first subframe in which the measurement window starts. The frame number SFN of the frame in which the subframe is located needs to satisfy: SFN mod T'=FLOOR(N/10). Where mod represents the modulo operation and FLOOR represents the rounding down operation, T'=T/10. The subframe number of the subframe in which the frame is located may be determined as follows: when the period of the measurement window is greater than 5 subframes, the subframe number Subframe of the subframe needs to satisfy Subframe=N mod 10; when measuring the window When the period is not more than 5 subframes, the subframe number subframe of the subframe needs to satisfy Subframe=N or N+5.

The above determination is an exemplary solution, and the present invention does not limit 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. 4 is a schematic diagram of a measurement window of a terminal. As shown in FIG. 4, cell 1 transmits a synchronization signal burst set in a period of 80 ms, cell 2 transmits a synchronization signal burst set in a period of 40 ms, and cell 3 transmits a synchronization signal burst set in a period of 20 ms, and cell 4 takes 10 ms as a period. The synchronization signal burst set is sent periodically. The base station configures two measurement windows for the terminal to measure the SSB of the synchronization signal burst set of the four cells. The measurement window 1 and the measurement window 2 of the terminal have different periods, which are respectively used to measure different cells. Because of the same offset, they overlap periodically. For example, the period of the measurement window 1 is 20 ms, and the period of the measurement window 2 is 80 ms. Therefore, in the first period and the last period of FIG. 4, the two measurement windows are overlapped. Since the synchronization signal burst set sent by the cell needs to be measured in the measurement window of the terminal, it implicitly indicates that the synchronization signal burst set transmission time of the cells to be measured also periodically overlaps. . Otherwise it will not be measured by the terminal.

For a terminal, a relay node can be considered as a base station. It can provide access services for terminals. The terminal does not distinguish whether it accesses a normal base station or a relay node. Therefore, the relay node also needs to perform the transmission of the synchronization signal burst set according to the above rule. At the same time, since the relay nodes also need to synchronize, discover or measure each other, the relay node also needs to send a synchronization signal burst set for measurement by other relay nodes. At the same time, 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 the relay node, it cannot measure the SSB of the synchronization signal burst set of other relay nodes or base stations while transmitting the synchronization signal burst set, so the synchronization signal of the relay node needs to be broken. The dispatch send and measurement configurations are coordinated. Because the synchronization signal set can be thought of as a collection of one or more SSBs. Therefore, the synchronization signal burst set transmission and measurement to the relay node can be considered as the transmission and measurement of one or more SSBs. Therefore, the following describes the transmission and measurement of the SSB as an example.

FIG. 5 is a schematic diagram of an SSB transmission mode. As shown in FIG. 5, one relay node needs to send two types of SSBs, one of which is used for synchronization, discovery or measurement of the access link or used by the terminal to synchronize, discover or measure the relay node, that is, in the figure "AC-SSB"; another type of synchronization, discovery or measurement for backhaul links or for synchronization, discovery or measurement by other relay nodes or base stations, ie "BH-SSB" in the figure. These two SSBs are each configured independently. For ease of understanding, the SSB for the terminal measurement sent by the relay node is called AC-SSB, indicating the SSB for accessing the link. Where AC indicates access. Similarly, the SSB sent by the relay node for measurement by other relay nodes or base stations is called BH-SSB, indicating the SSB for the backhaul link. Where BH represents the backhaul. It should be noted that this naming is only for convenience of description. Different names do not mean that their signal generation methods and resource mapping methods must be different. In order to avoid conflicts between 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 of the relay node 2 for the backhaul link. The advantage of this is that since different relay nodes send SSBs at different times, any one of the relay nodes can measure the time when the other relay nodes send the SSB without the SSB transmission and reception conflict.

However, the measurement overhead of this solution is large. For a particular relay node, if N other relay nodes are to be measured, since the SSB transmission time is orthogonal, a total of N measurements are required. Since beam scanning is required during synchronization, discovery, or measurement of the relay node, for some relay nodes, it is not possible to simultaneously transmit uplink and downlink data channels during the measurement window. For example, when the relay node is performing inter-frequency measurement, due to the limitation of the capability of the radio frequency device, it cannot transmit and receive data at the original working frequency point. This will result in the inability to transfer data over a long period of time and thus cause a large waste.

FIG. 6 is a schematic diagram of a signal transmission method according to an embodiment of the present application. By configuring the receiving and transmitting SSBs, the method enables the relay nodes to perform mutual synchronization, discovery, or measurement without causing large measurement overhead or signaling overhead. The method can be applied to a communication system with a relay node, and in particular, can support a scenario of multi-hop and multi-connection relay. The method includes the following steps.

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

The first signal may be an SSB, or may be other signals for synchronization or measurement. The processing manners in the embodiment of the present application are similar, and the embodiment of the present application is not limited. The one or more time resources are time resources required to transmit the first signal. The following description will be made by taking the first signal as an SSB as an example.

FIG. 7 is a schematic diagram of a resource location where multiple nodes send SSBs. A shaded rectangular block in Figure 7 represents one or more SSBs. The one or more SSBs are repeatedly transmitted according to a certain period. The one or more SSBs may constitute a set of synchronization signal bursts in the manner of FIG. Similarly, when a shaded rectangular block in FIG. 7 represents a synchronization signal burst set, the time resource occupied by the synchronization signal burst set (in the NR system is not more than 5 ms) according to a certain period. repeat. The resource locations of the base station, the relay node 1, the relay node 2, and the relay node 3 for transmitting the SSB are shown in FIG. Taking the relay node 1 as an example, FIG. 7 shows time resources, such as time resource 1 to time resource 5, required for the relay node 1 to transmit 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 box in Figure 7 represents the measurement window of the terminal. In this embodiment, the terminal is configured with two measurement windows that have different periods but have 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 needs to ensure that the SSB in the measurement window of the terminal is normally transmitted. Therefore, the configuration of the network may be such that the measurement window period of the terminal is greater than the SSB transmission period of the relay node, so that the SSB that does not fall within the measurement window of the terminal (ie, the relay nodes 1 to 3 in FIG. 7 are not in the dotted line frame) SSB) can be used for synchronization, discovery or measurement between relay nodes. The configuration of the measurement window of the foregoing terminal may be implemented by a network entity (for example, a donor base station) sending control signaling to the relay node. For the base station, it does not need to discover or measure other relay nodes, so the synchronization, discovery or measurement between the relay nodes has no effect on the SSB transmission of the base station.

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

Step 602: The relay node receives configuration signaling from the upper node, where the configuration signaling includes information for configuring a measurement window of the relay node. The information of the measurement window includes at least one of the following: a period of the measurement window, a length of the measurement window, and an offset of the measurement window. Further, the first time resource of the one or more time resources used by the relay node to send the first signal and the time resource corresponding to the measurement window all overlap or partially overlap.

The upper node refers to a node that can provide services for the lower node and can control the lower node (for example, data scheduling, beam management, power control, etc.). In general, the upper node is closer to the core network or the control center than the lower node, that is, in the downlink transmission process from the base station to the terminal, the data generally passes through the upper node and then passes through the lower node of the node. . In some cases, the superior node may also be referred to as an upstream node, and the 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 capable of configuring the relay node.

The configuration signaling may indicate a measurement window that the relay node synchronizes, discovers, or measures with other relay nodes. The measurement window corresponding to the time resource of the relay node overlaps with all or part of the time resource originally used for transmitting the first signal. This is equivalent to taking a part of the time resource originally used to transmit the first signal for synchronization, discovery or measurement to other relay nodes, and no longer transmitting the first signal with the part of the resources.

FIG. 8 is a schematic diagram of a measurement window of a relay node. As shown in FIG. 8, the mutual synchronization, discovery, or measurement between the relay nodes may use an SSB that is not configured to be measured in the measurement window of the terminal. Specifically, taking the relay node 1 as an example, the upper node can configure signaling to the relay node 1. The configuration signaling includes configuration information for instructing the relay node 1 to measure the SSBs of other relay nodes. Specifically, the configuration signaling includes one or more parameters of the measurement window (which may be considered as a time resource or a time window) that the relay node 1 performs SSB measurement. The one or more parameters include parameters such as the length of the measurement window, the period of the measurement window, and the offset of the measurement window. Alternatively, the measurement window of relay node 1 may overlap or partially overlap with the time resource of its transmitting SSB. E.g. The measurement window of the relay node 1 in FIG. 8 overlaps with the time resource 2. When the measurement window of the relay node and the time resource of the transmitting SSB occur, the relay node may perform SSB measurement in an overlapping time without transmitting the SSB, or transmit the SSB in an overlapping time without performing SSB measurement. In the present embodiment, the former method can be adopted. This is because: as shown in FIG. 8, since the SSB transmission times of different relay nodes will be regularly overlapped (for example, relay node 2 and relay node 3 in FIG. 8 also transmit SSB on time resource 2), The upper node can configure the measurement window of the relay node to overlap with its SSB transmission window, so that the relay node can detect the SSB signals of a plurality of other relay nodes in one measurement window. This generally reduces the overhead of the measurement. As shown in FIG. 8, by coordinating the measurement window of the terminal and 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 can still transmit normally, so there is no impact on the terminal.

Step 603: The relay node receives the second signal in a 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 can be an SSB or other signal for synchronization or measurement. Because the first time resource overlaps with the measurement window of the relay node in whole or in part, the relay node does not send the first signal when the two overlap, or the relay node is on the entire first time resource. The first signal is not sent.

The time resource 2 of the relay node 1 in Fig. 8 is originally used to transmit 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 resources corresponding to the measurement window to synchronize, discover or measure the relay nodes transmitting the SSB.

For ease of understanding, the SSB for the terminal measurement sent by the relay node is called AC-SSB, indicating the SSB for accessing the link. Where AC indicates access. Similarly, the SSB sent by the relay node for measurement by other relay nodes is called BH-SSB, indicating the SSB for the backhaul link. Where BH represents the backhaul. It should be noted that this naming is only for convenience of description. Different names do not mean that their signal generation methods and resource mapping methods must be different.

FIG. 9 is a schematic diagram of SSB transmission of a relay node. A relay node can send two SSBs, including AC-SSB and BH-SSB. These two types of SSBs can take the form of frequency division multiplexing to reduce the impact on the SSB measurements of the terminal. As shown in FIG. 9, for one relay node, the AC-SSB is mapped at the frequency position F1, and the BH-SSB is mapped at the frequency position F2. In addition, the time resources occupied by these two types of SSBs have different offsets so that they do not overlap in time. The advantage of this is that if the two types of SSBs are not frequency division multiplexed and both types of SSBs are transmitted at the F1 frequency, the terminal may measure the BH-SSB at the F1 frequency. If the beam of the BH-SSB and the beam on the AC-SSB do not satisfy the quasi co-location (QCL) relationship, the measurement error of the terminal will be caused. If two types of SSBs are not time-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 send the SSB. This will have an adverse effect on 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 burst of synchronization signals. As shown in FIG. 10, AC-SSB and BH-SSB occupy only a part of the SSB of the synchronization signal burst set, respectively. Therefore, the measurement window of the relay node will partially or completely overlap with the time resource for transmitting the BH-SSB of the burst of the synchronization signal. Take the relay node 1 in FIG. 10 as an example. The measurement window of the relay node 1 overlaps with the BH-SSB of a synchronization signal burst set it transmits. However, the measurement window of the relay node 1 does not overlap with the AC-SSB of a synchronization signal burst set it transmits. That is to say, even in a burst of synchronization signal bursts, the time resources originally used to transmit the BH-SSB 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 resource originally used to transmit the AC-SSB. In this way, the impact 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 and the time resource corresponding to the AC-SSB overlap in whole or in part, the relay node still performs AC-SSB transmission on the overlapping time resources. Further, the relay node does not receive the BH-SSB sent by other relay nodes or base stations. That is to say, at this time, the relay node does not perform measurement of BH-SSB. Optionally, the relay node reports to the superior node that the measurement is invalid or not measured.

The measurement overhead can be reduced by the method provided in the embodiment of the present application. For example, if the transmitting SSB method of FIG. 5 is employed, for a particular relay node, if N other relay nodes are to be measured, since the SSB transmission time is orthogonal, a total of N measurements are required. Since beam scanning is performed during synchronization, discovery, or measurement of the relay node, for some relay nodes, it is not possible to simultaneously transmit uplink and downlink data channels during the measurement window, for example, when the relay node is performing In the case of inter-frequency measurement, due to the limitation of the capability of the RF device, it cannot transmit and receive data at the original working frequency point. This will result in a large waste. The method provided by the embodiment of the present application can also measure N other relay nodes. For example, the scenario shown in Figure 7 or Figure 8 can be easily extended to N relay nodes. For a relay node, such as relay node 1 in Figure 7, it can measure other relay nodes within one measurement window without separately measuring each relay node separately. This can greatly reduce the measurement overhead.

The embodiment of the present application also provides a transmission method of the SSB. The method includes generating a BH-SSB and transmitting a BH-SSB. The method also includes generating an AC-SSB; transmitting the BH-SSB. There are two ways to generate BH-SSB:

The first way: use the same signal generation method as AC-SSB. Specifically, the signal generation of the BH-SSB may include the following aspects.

The PSS sequence in BH-SSB is a pseudo-random sequence of length 127, which is generated in the following way:

d _PSS (n)=1-2x(m)

0≤n<127

among them

It contains 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 also a pseudo-random sequence of length 127, which is generated in the following way:

d _SSS (n)=[1-2x ₀ ((n+m ₀ )mod127)][1-2x ₁ ((n+m ₁ )mod127)]

0≤n<127

among them,

It contains another part of the cell ID, it and

Jointly determine the cell ID, ie

In addition:

And have

The second way: use the special BH-SSB generation method, which is different from the AC-SSB generation method.

As an optional solution, the foregoing second manner can prevent the terminal from detecting the BH-SSB signal, thereby making the configuration of the BH-SSB more flexible. For example, the relay node can change the beam of the BH-SSB, shut down (or stop) the transmission of a certain BH-SSB or change the transmission period of the BH-SSB, without affecting the measurement of the terminal. Specifically, the difference between BH-SSB and AC-SSB obtained by the special BH-SSB generation method may 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 at the candidate location of the AC-SSB. For example, the frequency position of the BH-SSB is not on the standard sync signal raster.

(2) The primary synchronization sequence in the BH-SSB is different from the primary synchronization sequence in the 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. In order to avoid terminal resolution to BH-SSB, three new sequences can be defined as the primary synchronization sequence of the backhaul link. They are different from the three main synchronization sequences used for terminal measurement, but can correspond one-to-one, for example, new sequence 1 corresponds to original sequence 1; new sequence 2 corresponds to original sequence 3; new sequence 3 corresponds to original sequence 3, Corresponding means that they contain the same cell ID information. Therefore, the relay node will not be affected to calculate the cell ID. It is of course also possible to make the secondary synchronization sequence in the BH-SSB different from the secondary synchronization sequence in the AC-SSB. Specifically, the three new sequences are orthogonal to the original three sequences or have a lower correlation.

For example, the new PSS sequence is still based on the generation of the PSS sequence described above, but the way m is calculated is modified:

Where Δ represents an integer offset. Alternatively, the value of Δ is agreed upon in the protocol and may be one of 20, 21, 22, or 23. These values can ensure that the interval between the adjusted value of the new 3 m and the value of the original 3 m is relatively uniform, which is beneficial to control mutual interference. Alternatively, the value of Δ may not be agreed to a specific value first, but is notified to the relay node by the superior node.

Similarly, SSS sequences can also be used to generate new sequences for BH-SSB in this way. Immediate

and / or

(3) The coding scheme of the broadcast channel in the BH-SSB is different from the broadcast channel in the AC-SSB. Specifically, the source bits of the broadcast channel are different; the scrambling codes of the broadcast channel are different (or the scrambling manner of the broadcast channel is different); or the CRC check code of the broadcast channel is added in different manners.

Based on the same inventive concept, an embodiment of the present application further provides a signal transmission apparatus. The apparatus can be used to perform the method performed by the relay node in the above method embodiments.

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 device 1100 includes a processing module 1101 and a receiving module 1102. Specifically, each module may have a structure that realizes the following functions.

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

The receiving module 1102 is configured to receive configuration signaling from a superior node, where the configuration signaling includes information for configuring a measurement window of the device, where the information of the measurement window includes at least one of: a period of the measurement window, The length of the measurement window, the offset of the measurement window, the first time resource of the one or more time resources and the time resource corresponding to the measurement window all overlap or partially overlap. The receiving module 1102 is also used to Receiving a second signal within a 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 device can also be a terminal.

Further, the device further includes a sending module 1103. The sending module 1103 is configured to not send the first signal on a time resource in which all the time resources corresponding to the first time resource and the measurement window overlap or partially overlap. . Not transmitting the first signal on the overlapping time resources, so that the saved time resource is used to receive the second signal, so that the relay node can synchronize the other relay nodes or base stations that send the second signal according to the second signal. , discovery or measurement. Additionally, the relay node can also transmit the first signal on the 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. 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 in some cases, the relay node communicates with the superior node in the role (or identity) of the terminal, for example, when the quality of the backhaul link occurs or the initial access occurs, the relay node also uses the relay node. The second SSB performs synchronization, discovery or measurement.

Optionally, the first time resource of the one or more time resources and the time resource corresponding to the measurement window all overlap or partially overlap: the time for transmitting the first SSB in the first time resource The resources and the time resources corresponding to the measurement window all overlap or partially overlap. When the first time resource is used to carry the first SSB and the second SSB, the part of the time resource in the first time resource for carrying the first SSB may be used for receiving the second signal. To achieve synchronization, discovery or measurement of other relay nodes or base stations.

Optionally, the first SSB and the second SSB are mapped on different frequency resources; or the primary synchronization signal PSS sequence in the first SSB and the second SSB is different; or the first SSB The scrambling code or cyclic redundancy check CRC code of the physical broadcast channel in the second SSB is different.

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

It should be noted that the signal transmission device 1100 can be used to perform the method performed by the relay node in the foregoing method embodiment. The implementation manners and technical effects not described in detail in the signal transmission device 1100 can be referred to the related description of the foregoing method embodiments.

Based on the same inventive concept, an embodiment of the present application further provides a signal transmission apparatus. The apparatus can be used in the method performed by the superior node in the above method embodiment.

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 device 1200 includes a processing module 1201 and a transmitting module 1202. Specifically, each module may have a structure that realizes the following functions.

The processing module 1201 is configured to generate configuration signaling.

The sending module 1202 is configured to send configuration signaling to the relay node, where the configuration signaling includes information for configuring a measurement window of the relay node, where the information of the measurement window includes at least one of: a period of the measurement window The length of the measurement window, the offset of the measurement window, the first time resource of the one or more time resources used by the relay node to send the first signal and the time resource corresponding to the measurement window all overlap or Partial overlap.

The signal transmission device 1200 causes the relay node to receive a second signal within a time resource corresponding to the measurement window.

It should be noted that the signal transmission device 1200 can be used to perform the method performed by the upper node in the foregoing method embodiment. For the implementation manner and the technical effects that are not described in detail in the signal transmission device 1200, refer to the related description of the foregoing method embodiment.

Based on the same inventive concept, an embodiment of the present application further provides a signal transmission apparatus. The signal transmission device can be used to transmit an 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 transmission module 1301 and a processing module 1302. Specifically, each module may have a structure that realizes the following functions.

The sending module 1301 is configured to send the first SSB and the 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 device 1300 further includes a processing module 1302 for generating the first SSB and the second SSB. The signal transmission device 1300 can be a relay node. In some cases, it can also be a terminal.

It should be noted that the signal transmission device 1300 can be used to perform the method in the foregoing method embodiments. The implementation manners and technical effects not described in detail in the signal transmission device 1300 can be referred to the related description of the foregoing method embodiments.

Based on the same inventive concept, the embodiment of the present application further provides a signal transmission device, which can 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 for implementing the functions of each node in the signal transmission method provided by the embodiment of the present application. Apparatus 1400 can also include at least one memory 1402 for storing program instructions and/or data. Memory 1402 is coupled to processor 1401. Processor 1401 may operate in conjunction with memory 1402. The processor 1401 may execute program instructions stored in the memory 1402. At least one of the at least one memory 1402 may be included in the processor 1401.

The device 1400 can also include a communication interface 1403, and the device 1400 can perform information interaction with the other device through the communication interface 1403. Communication interface 1403 can be a circuit, bus, transceiver, or any other device that can be used to interact with information. Wherein, by way of example, the other device may be a base station, a terminal or a relay node. The processor 1401 can transmit and receive data using the communication interface 1403. For example, the communication interface 1403 is used for data transmission and reception with other nodes.

The specific connection medium between the communication interface 1403, the processor 1401, and the memory 1402 is not limited in the embodiment of the present application. The embodiment of the present application is connected by a bus between the memory 1402, the processor 1401, and the communication interface 1403 in FIG. 14. The bus is indicated by a thick line in FIG. 14, and the connection manner between other components is only schematically illustrated. Not limited to limits. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 14, but it does not mean that there is only one bus or one type of bus.

The embodiment of the present application further provides a chip for supporting the device 1400 to implement the method in the foregoing method embodiment. Further, the chip is connected to a memory for reading and executing a software program stored in the memory to implement the method provided by any one of the aspects of the first aspect to the third aspect or any one of the aspects. .

The embodiment of the present application provides a chip, the chip includes a processor and a memory, and the processor is configured to read a software program stored in the memory to implement any one of the first aspect to the third aspect or Any one of the methods provided by the design on the one hand.

The embodiment of the present application provides a computer program product comprising instructions, which when executed on a computer, cause the computer to execute the method in the above method embodiment.

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

In addition, the embodiment of the present application further provides a communication system. The communication system includes the above-described signal transmission device 1100 and the above-described signal transmission device 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 present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

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

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

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it 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 the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.). The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media. The usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)) or the like.

Claims

A signal transmission method, comprising:

The relay node determines time resource information for transmitting the first signal, where the time resource information includes one or more time resources;

The relay node receives configuration signaling from a superior node, 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: a period of the measurement window The length of the measurement window, the offset of the measurement window, the first time resource of the one or more time resources and the time resource corresponding to the measurement window all overlap or partially overlap;

The relay node receives a second signal within a time resource corresponding to the measurement window.
The method of claim 1 comprising:

The relay node does not send the first signal on the time resource in which the first time resource and the time resource corresponding to the measurement window all overlap or partially overlap.
The method according to claim 1 or 2, comprising:

The first signal includes a first synchronization signal block SSB and a second SSB.
The method of claim 3 wherein:

The first time resource of the one or more time resources and the time resource corresponding to the measurement window all overlap or partially overlap include: a time resource for transmitting the first SSB in the first time resource, and the The time resources corresponding to the measurement window all overlap or partially overlap.
Method according to claim 3 or 4, characterized in that

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

The sequence of the primary synchronization signal PSS in the first SSB and the second SSB is different; or

The scrambling code or cyclic redundancy check CRC code of the physical broadcast channel in the first SSB and the second SSB is different.
A method according to any one of claims 1 to 5, wherein

The relay node receives a second signal from a relay node adjacent to the relay node.
A signal transmission device, comprising:

a processing module, 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, configured to receive configuration signaling from a superior node, where the configuration signaling includes information for configuring a measurement window of the device, the information of the measurement window includes at least one of: a period of the measurement window, and a measurement The length of the window, the offset of the measurement window, the first time resource of the one or more time resources and the time resource corresponding to the measurement window all overlap or partially overlap;

The receiving module is further configured to receive a second signal in a time resource corresponding to the measurement window.
The apparatus according to claim 7, wherein said apparatus further comprises a transmitting module;

The sending module is configured to not send the first signal on a time resource in which the first time resource and the time resource corresponding to the measurement window all overlap or partially overlap.
The device according to claim 7 or 8, comprising:

The first signal includes a first synchronization signal block SSB and a second SSB.
The device of claim 9 wherein:

The first time resource of the one or more time resources and the time resource corresponding to the measurement window all overlap or partially overlap include: a time resource for transmitting the first SSB in the first time resource, and the The time resources corresponding to the measurement window all overlap or partially overlap.
Device according to claim 9 or 10, characterized in that

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

The sequence of the primary synchronization signal PSS in the first SSB and the second SSB is different; or

The scrambling code or cyclic redundancy check CRC code of the physical broadcast channel in the first SSB and the second SSB is different.
A device according to any one of claims 7-11, wherein

The receiving module is further configured to receive a second signal from a relay node adjacent to the device.