Method and apparatus for determining random access signal occasion (RO)

Abstract

The embodiment of the application provides a method and a communication device for determining a random access signal occasion RO, the method comprising: receiving, by a terminal device, a target first SSB, the target first SSB being one of a plurality of first SSBs forwarded by a repeater, each first SSB containing index indication information, the index indication information being used to indicate an index of the first SSB, determining a plurality of associated random access signal occasions RO according to the index of the first SSB and a first mapping relationship; determining, by the terminal device, a first identifier corresponding to the target first SSB, determining a first RO set from the plurality of associated ROs according to the first identifier corresponding to the target first SSB and a second mapping relationship, the first RO set comprising at least one RO; and transmitting, by the terminal device, a random access signal on one RO included in the first RO set. The method provided by the application enables the repeater to receive the random access signal transmitted by the terminal device and forward the random access signal to a network device.

Description

Technical Field

[0001] This application relates to the field of communications, and more specifically, to a communication method and apparatus for determining the timing of a random access signal (RO). Background Technology

[0002] A smart repeater (SR), also known as a network controlled repeater (NCR), is a new type of node used to improve network coverage. This node has the characteristics of a radio frequency repeater (RF repeater) in LTE (Long Term Evolution), that is, it has the relay function of amplification and forwarding. It can amplify and forward the radio frequency signals of network devices to terminal devices, and amplify and forward the signals of terminal devices to network devices.

[0003] In existing SR-less networks, for the random access process of terminal devices, the terminal device typically first determines a synchronization signal block (SSB) or an SSB identifier (the distinction between SSB and SSB identifier is not made below). For example, by measuring the Reference Signal Received Power (RSRP) of each SSB, an SSB with an RSRP greater than a threshold is selected. The network device then configures a mapping relationship between the random access channel occasion (RACH) and the corresponding RACH occasion (RO) for that SSB. The terminal device transmits a random access signal in the beam direction corresponding to the SSB on any RO corresponding to that SSB, and the network device also receives possible random access signals in the beam direction corresponding to the SSB transmission at the corresponding RO location. When the channel has spatial beam direction consistency, in downlink scenarios, when the network device transmits a signal in the beam direction of that SSB, the terminal device can receive higher signal energy. In uplink scenarios, when the network device and terminal device use symmetrical beams, the network device can also receive the terminal device's random access signal with higher gain.

[0004] However, when an SR is configured in the network, since the terminal device still sends the random access signal in the direction of receiving the target SSB, and the direction of the SR receiving beam is uncertain, there may be a mismatch between the direction of the SR receiving beam and the direction of the terminal device sending beam. This may cause the SR to fail to receive the random access signal of the terminal device, and thus fail to forward the random access signal of the terminal device to the network device, resulting in the terminal device's random access failure. Summary of the Invention

[0005] This application provides a communication method and device for determining the timing (RO) of a random access signal. This method aligns the RO of the terminal device sending the random access signal with the RO of the repeater receiving the random access signal. Simultaneously, it enables the repeater to receive the random access signal from the terminal device using matched beams or receiving parameters at the aligned RO. This allows the repeater to receive the random access signal sent by the terminal device with higher gain, without affecting the original pattern of the network device sending the synchronization signal block (SSB).

[0006] In a first aspect, a communication method is provided, comprising: a terminal device receiving a target first synchronization signal physical broadcast channel block (SSB), the target first SSB being one of a plurality of first SSBs forwarded by a repeater, each first SSB containing index indication information for indicating the index of the first SSB; determining a plurality of associated random access signal timings (ROs) based on the index of the first SSB and a first mapping relationship; the terminal device determining a first identifier corresponding to the target first SSB; determining a first RO set from the plurality of associated ROs based on the first identifier corresponding to the target first SSB and a second mapping relationship, the first RO set including at least one RO; and the terminal device transmitting a random access signal on one of the ROs included in the first RO set.

[0007] The communication method provided in this application embodiment enables the RO of the random access signal sent by the terminal device to be aligned with the RO of the random access signal received by the repeater. At the same time, the repeater uses a matching beam or receiving parameters to receive the random access signal of the terminal device at the aligned RO, so that the repeater can receive the random access signal sent by the terminal device with a higher gain, without affecting the pattern of the original synchronization signal block SSB sent by the network device.

[0008] In conjunction with the first aspect, in some implementations of the first aspect, determining the first RO set from multiple associated ROs based on the first identifier and the second mapping relationship corresponding to the target first SSB includes: determining that the first RO set from multiple associated ROs includes M groups of ROs, and determining the m-th group of ROs in the M groups of ROs as the first RO set based on the first identifier corresponding to the target first SSB, where M is a positive integer and m is a positive integer less than or equal to M, and the M groups of ROs are obtained by grouping multiple associated ROs according to the second mapping relationship.

[0009] In conjunction with the first aspect, in some implementations of the first aspect, determining multiple associated ROs based on the first SSB and the first mapping relationship includes: determining the time-frequency resource configuration information of multiple associated ROs based on the index of the first SSB and the first mapping relationship. The time-frequency resource configuration information includes parameters N and L, where 1 / N represents the number of ROs associated with each SSB in each round of mapping between the SSB and ROs, and L represents the number of ROs corresponding to each time unit with ROs in the frequency domain.

[0010] In conjunction with the first aspect, in some implementations of the first aspect, N, L, and M satisfy the following relationship: K is a positive integer. The second mapping relationship is: multiple associated ROs include ROs of multiple rounds of mapping. Each round of mapping includes K*M ROs. In each round of mapping, the (m-1)*K*L+1 to the m*K*L ROs correspond to the m group of ROs.

[0011] In conjunction with the first aspect, in some implementations of the first aspect, the second mapping relationship is as follows: the RO included in the j-th associated period AP of the i-th associated pattern period APP among multiple associated ROs belongs to the m-th group of ROs, where m = mod[(i-1)*A+j-1, M], A is the number of APs included in an APP determined according to the first mapping relationship, and A, i, and j are positive integers.

[0012] In conjunction with the first aspect, in some implementations of the first aspect, M is indicated by first indication information or determined by a terminal device by measuring multiple first SSBs, wherein the first indication information is associated with a target first SSB.

[0013] In conjunction with the first aspect, in some implementations of the first aspect, m is indicated by the second indication information or m is determined by the terminal device by measuring the plurality of first SSBs and the target first SSB, wherein the second indication information is associated with the target first SSB.

[0014] In conjunction with the first aspect, in some implementations of the first aspect, the terminal device determines that the terminal device is being served by the repeater based on the third indication information, the third indication information being used to indicate that the terminal device is being served by the repeater, or the terminal device determines that the terminal device is being served by the repeater by measuring multiple first SSBs.

[0015] In conjunction with the first aspect, in some implementations of the first aspect, the terminal device receiving the target first SSB includes: the terminal device receiving the target first SSB using a first spatial reception parameter; the terminal device transmitting a random access signal on the ROs included in the first RO set includes: the terminal device transmitting the random access signal on the ROs included in the first RO set using a first spatial transmission parameter, wherein the first spatial transmission parameter is a spatial transmission parameter corresponding to the first spatial reception parameter.

[0016] It should be noted that the first spatial domain transmission parameter can also be the first transmission beam, and the first spatial domain reception parameter can also be the first reception parameter.

[0017] Optionally, the first spatial transmission parameter can be the same as the first spatial reception parameter, or it can be similar to the first spatial reception parameter.

[0018] Secondly, a communication method is provided, comprising: a repeater receiving and forwarding a first synchronization signal physical broadcast channel block (SSB) according to a first cycle, the first SSB including index indication information, the index indication information being used to indicate the index of the first SSB; in each first cycle, the repeater forwards the first SSB using one of M spatial transmission parameters, wherein the spatial transmission parameter used in the x-th first cycle is the same as the spatial transmission parameter used in the (x+M)-th first cycle, and M and x are positive integers; the repeater determines multiple associated remote access points (ROs) according to the index of the first SSB and a first mapping relationship; the repeater receives a random access signal using a second spatial reception parameter on the y-th group of ROs, the y-th group of ROs being one of the M groups of ROs, the M groups of ROs being obtained by grouping multiple associated ROs according to the second mapping relationship, the second spatial reception parameter being the spatial reception parameter corresponding to the spatial transmission parameter used to forward the first SSB in the (y+C)-th first cycle, where C is an integer greater than or equal to zero, and y is a positive integer less than or equal to M.

[0019] The communication method provided in this application embodiment enables the RO of the random access signal sent by the terminal device to be aligned with the RO of the random access signal received by the repeater. At the same time, the repeater uses a matching beam or receiving parameters to receive the random access signal of the terminal device at the aligned RO, so that the repeater can receive the random access signal sent by the terminal device with a higher gain, without affecting the pattern of the original synchronization signal block SSB sent by the network device.

[0020] In conjunction with the second aspect, in some implementations of the second aspect, the repeater determines multiple associated ROs based on the index of the first SSB and the first mapping relationship, including: the repeater determines the time-frequency resource configuration information of multiple associated ROs based on the index of the first SSB and the first mapping relationship. The time-frequency resource configuration information includes parameters N and L, where 1 / N represents the number of ROs associated with each SSB in each round of mapping between SSB and RO, and L represents the number of ROs in the frequency domain corresponding to each time unit with ROs.

[0021] In conjunction with the second aspect, in some implementations of the second aspect, N, L, and M satisfy the following relationship: Where K is a positive integer, the second mapping relationship is: multiple associated ROs include ROs of multiple rounds of mapping, each round of mapping includes K*M ROs, and the (y-1)*K*L+1 to y*K*L ROs in each round of mapping correspond to the y-th group of ROs.

[0022] In conjunction with the second aspect, in some implementations of the second aspect, the second mapping relationship is as follows: the RO included in the j-th associated period AP of the i-th associated pattern period APP among multiple associated ROs belongs to the y-th group of ROs, where y = mod[(i-1)*A+j-1, M], A is the number of APs included in an APP determined according to the first mapping relationship, and A, i, and j are positive integers.

[0023] Thirdly, a communication method is provided, comprising: a network device sending one or more of the following information to a terminal device: a first indication information, a second indication information, or a third indication information; wherein the first indication information is used to indicate M, the second indication information is used to indicate m, and the third indication information is used to indicate that the terminal device is being served by a repeater.

[0024] The communication method provided in this application embodiment enables the RO of the random access signal sent by the terminal device to be aligned with the RO of the random access signal received by the repeater. At the same time, the repeater uses a matching beam or receiving parameters to receive the random access signal of the terminal device at the aligned RO, so that the repeater can receive the random access signal sent by the terminal device with a higher gain, without affecting the pattern of the original synchronization signal block SSB sent by the network device.

[0025] Fourthly, a communication method is provided, comprising: a terminal device receiving indication information or the terminal device measuring the RSRP value of a first SSB; and the terminal device determining the service being served by a repeater based on the indication information or the measured value.

[0026] The method provided in this application enables a terminal device to determine whether a repeater exists between itself and a network device to serve it, and then determines which method to use to determine the RO and send a random access signal.

[0027] In conjunction with the fourth aspect, in one possible implementation of the fourth aspect, the indication information may be a third indication information sent by the network device to the terminal device when the terminal device is in a connected state. The terminal device can determine that it is being served by the repeater through the third indication information, which is used to indicate that the terminal device is being served by the repeater.

[0028] In conjunction with the fourth aspect, in one possible implementation, the indication information can be location indication information sent by the network device to the terminal device when the terminal device is in a connected state. The terminal device can determine whether it is being served by a repeater through the location indication information. This location indication information is used to indicate the geographical location of the repeater. For example, if the distance between the geographical location of the terminal device and the geographical location of a certain repeater is less than a second threshold, the terminal device can determine that it is being served by a repeater. The network device can carry the repeater's location indication information in the MIB or SIB.

[0029] In conjunction with the fourth aspect, in one possible implementation of the fourth aspect, the terminal device can determine whether it is served by a repeater by measuring the RSRP value of a first SSB. This first SSB is the same SSB sent by the network device in the same direction within different first cycles. If the terminal device is served by a repeater, then the first SSB is an SSB that can be received and forwarded by the repeater. Determining whether the terminal device is served by a repeater by measuring the RSRP value of the first SSB can be understood as follows: if the terminal device is served by a repeater, then the first SSB is received by the repeater and forwarded in different directions within different first cycles. Therefore, the RSRP value of the first SSB measured by the terminal device in different first cycles will differ.

[0030] For example, if the variance or peak-to-average ratio of the RSRP of the first SSB is greater than the third threshold within multiple first cycles, the terminal device can determine that it is being served by the repeater.

[0031] For example, if the RSRP strength of the first SSB changes more than the fourth threshold within two adjacent first cycles, the terminal device can determine that it is being served by the repeater.

[0032] For example, if the non-zero frequency component of the RSRP of the first SSB after normalization of the FFT sequence is greater than the fifth threshold within multiple first cycles, the terminal device can determine that it is being served by the repeater.

[0033] Fifthly, a communication apparatus is provided, comprising units for performing steps of the communication methods described in the first aspect and its various implementations.

[0034] In one design, the communication device is a communication chip, which may include input circuitry or interface for transmitting information or data, and output circuitry or interface for receiving information or data.

[0035] In another design, the communication device is a communication equipment (e.g., a terminal device), and the communication chip may include a transmitter for sending information and a receiver for receiving information or data.

[0036] In a sixth aspect, a communication apparatus is provided, comprising units for performing each step of the communication method in the second aspect and its implementations described above.

[0037] In one design, the communication device is a communication chip, which may include input circuitry or interface for transmitting information or data, and output circuitry or interface for receiving information or data.

[0038] In another design, the communication device is a communication equipment (e.g., a repeater), and the communication chip may include a transmitter for sending information and a receiver for receiving information or data.

[0039] In a seventh aspect, a communication apparatus is provided, comprising units for performing each step of the communication method in the third aspect and its various implementations described above.

[0040] In one design, the communication device is a communication chip, which may include input circuitry or interface for transmitting information or data, and output circuitry or interface for receiving information or data.

[0041] In another design, the communication device is a communication equipment (e.g., a network device), and the communication chip may include a transmitter for sending information and a receiver for receiving information or data.

[0042] Eighthly, a communication apparatus is provided, comprising units for performing each step of the communication method in the fourth aspect and its various implementations described above.

[0043] In one design, the communication device is a communication chip, which may include input circuitry or interface for transmitting information or data, and output circuitry or interface for receiving information or data.

[0044] In another design, the communication device is a communication equipment (e.g., a terminal device), and the communication chip may include a transmitter for sending information and a receiver for receiving information or data.

[0045] A ninth aspect provides a communication device, including a processor and a memory for storing a computer program, the processor for calling and running the computer program from the memory, causing the communication device to perform the communication methods described in the first aspect and its implementations.

[0046] Optionally, the processor may be one or more, and the memory may be one or more.

[0047] Optionally, the memory may be integrated with the processor, or the memory may be separated from the processor.

[0048] Optionally, the communication device may also include a transmitter and a receiver.

[0049] In a tenth aspect, a communication device is provided, comprising a processor and a memory for storing a computer program, the processor for calling and running the computer program from the memory, such that the communication device performs the communication methods described in the second aspect and its implementations.

[0050] Optionally, the processor may be one or more, and the memory may be one or more.

[0051] Optionally, the memory may be integrated with the processor, or the memory may be separated from the processor.

[0052] Optionally, the communication device may also include a transmitter and a receiver.

[0053] Eleventhly, a communication device is provided, comprising a processor and a memory for storing a computer program, the processor for calling and running the computer program from the memory, causing the communication device to perform the communication methods described in the third aspect and its various implementations.

[0054] Optionally, the processor may be one or more, and the memory may be one or more.

[0055] Optionally, the memory may be integrated with the processor, or the memory may be separated from the processor.

[0056] Optionally, the communication device may also include a transmitter and a receiver.

[0057] In a twelfth aspect, a communication device is provided, comprising a processor and a memory for storing a computer program, the processor for calling and running the computer program from the memory, such that the communication device performs the communication methods described in the fourth aspect and its various implementations.

[0058] Optionally, the processor may be one or more, and the memory may be one or more.

[0059] Optionally, the memory may be integrated with the processor, or the memory may be separated from the processor.

[0060] Optionally, the communication device may also include a transmitter and a receiver.

[0061] In a thirteenth aspect, a computer program product is provided, the computer program product comprising: a computer program (also referred to as code or instructions), which, when the computer program is run, causes a computer to execute any one of the first to fourth aspects and the communication methods in their respective implementations.

[0062] In a fourteenth aspect, a communication system is provided, comprising: at least one means for performing the method of the first aspect and its implementations.

[0063] Optionally, the communication system further includes at least one means for performing the methods of the second aspect and its various implementations.

[0064] Optionally, the communication system further includes at least one means for performing the methods of the third aspect and its various implementations.

[0065] In a fifteenth aspect, a communication system is provided, comprising: at least one means for performing the methods of the second aspect and its implementations.

[0066] Optionally, the communication system further includes at least one means for performing the method of the first aspect and its various implementations.

[0067] Optionally, the communication system further includes at least one means for performing the methods of the third aspect and its various implementations.

[0068] In a sixteenth aspect, a communication system is provided, comprising: at least one means for performing the methods of the third aspect and its implementations.

[0069] Optionally, the communication system further includes at least one means for performing the method of the first aspect and its various implementations.

[0070] Optionally, the communication system further includes at least one means for performing the methods of the second aspect and its various implementations.

[0071] In a seventeenth aspect, a chip system is provided, including a memory and a processor, the memory for storing a computer program and the processor for calling and running the computer program from the memory, such that a communication device equipped with the chip system performs the communication methods of any of the above aspects and their implementations.

[0072] The chip system may include input circuits or interfaces for transmitting information or data, and output circuits or interfaces for receiving information or data. Attached Figure Description

[0073] Figure 1 This is a schematic diagram of the system architecture used in the embodiments of this application.

[0074] Figure 2 This is a schematic diagram of a network device periodically sending SSBs according to an embodiment of this application.

[0075] Figure 3 This is an exemplary schematic diagram of a round of mapping when N is less than 1, provided in an embodiment of this application.

[0076] Figure 4 This is a schematic diagram of the three cycles in the RO mapping relationship.

[0077] Figure 5 This is a schematic diagram of an example of the method for determining RO provided in the embodiments of this application.

[0078] Figure 6 This is a schematic diagram of a repeater provided in this application receiving and forwarding a first SSB in multiple first cycles.

[0079] Figure 7 This is a schematic diagram of an example of the second mapping relationship provided in the embodiments of this application.

[0080] Figure 8 This is a schematic diagram of another example of the second mapping relationship provided in the embodiments of this application.

[0081] Figure 9 This is a schematic diagram of another example of the second mapping relationship provided in the embodiments of this application.

[0082] Figure 10 This is a schematic diagram of another example of the method for determining RO provided in the embodiments of this application.

[0083] Figure 11 This is a schematic diagram of how, in method 1000, the network device periodically sends SSB according to the second cycle and the repeater periodically forwards SSB according to the second cycle.

[0084] Figure 12 This is a schematic diagram of an example of a communication device provided in an embodiment of this application.

[0085] Figure 13 This is a schematic diagram of another example of the communication device provided in the embodiments of this application.

[0086] Figure 14 This is a schematic diagram of another example of the communication device provided in the embodiments of this application. Detailed Implementation

[0087] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0088] The technical solutions of this application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) system, 5th Generation (5G) system, or New Radio (NR), etc.

[0089] In this application, the terminal device can refer to user equipment, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user equipment. The terminal device can also be a cellular phone, cordless phone, Session Initiation Protocol (SIP) phone, Wireless Local Loop (WLL) station, Personal Digital Assistant (PDA), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, vehicle-mounted device, wearable device, terminal device in a 5G network, or terminal device in an evolved Public Land Mobile Network (PLMN), etc. This application does not limit the scope of the terminal device to these specific types.

[0090] The network device in this application embodiment can be a device for communicating with terminal devices. The network device can be an evolved NodeB (eNB or eNodeB) in an LTE system, a next-generation NodeB (gNB) in an NR system, or a radio controller in a Cloud Radio Access Network (CRAN) scenario. Alternatively, the network device can be a relay station, access point, vehicle-mounted device, wearable device, or network device in a 5G network or an evolved PLMN network, etc. The embodiments of this application are not limited to these.

[0091] The following is an introduction to intelligent repeaters.

[0092] A Smart Repeater (SR) is a new type of node used to improve network coverage. On one hand, this node possesses the characteristics of an LTE radio frequency repeater, namely, it has amplification-forwarding relay functionality, capable of amplifying and forwarding the radio frequency signals of network devices to users, and amplifying and forwarding the signals of terminal devices to network devices. On the other hand, the intelligence of the SR lies in its ability to receive control information from its associated network devices, thereby dynamically adjusting its transmit and receive beam orientation, transmit power, SR node switching status, and operating bandwidth according to real-time needs. This allows the SR to serve specific terminal devices while controlling interference to other terminal devices.

[0093] Controlling the orientation of the transmit and receive beams of a signal transceiver (SR) is a crucial characteristic in high-frequency bands, such as millimeter-wave bands. In high-frequency bands, signal path loss in space is particularly significant. To overcome this large path loss, transmitting and / or receiving equipment needs to employ beamforming methods to transmit and / or receive signals, i.e., transmitting and / or receiving signals in a specific beam direction. The beam can be wide, narrow, or other types. The beamforming technology can be beamforming or other techniques. Specifically, beamforming technology can be digital beamforming, analog beamforming, or hybrid digital / analog beamforming. The beam includes the transmit beam and the receive beam. The transmit beam refers to the signal strength distribution formed in different directions in space after the signal is transmitted through the antenna, while the receive beam refers to the distribution of received signal strength that the antenna array strengthens or weakens in different directions in space. A common implementation of beamforming is to set different amplitude gains and / or phase deviations on multiple transmit / receive antenna elements, which can effectively form a spatial filter, thereby achieving transmission and reception in a specific beam direction. Therefore, different beams can be called or correspond to different spatial parameters, spatial filters, or spatial filter parameters; different transmit beams can be called or correspond to different spatial transmit parameters, spatial transmit filters, or spatial transmit filter parameters; different receive beams can be called different spatial receive parameters, spatial receive filters, or spatial receive filter parameters.

[0094] Therefore, when network devices can control the beam orientation of the SR in real time, they can dynamically adjust the SR beam according to the users they need to schedule, thereby improving the signal-to-noise ratio of the uplink and downlink signals of the scheduled terminal devices and improving the reliability of transmission rate.

[0095] Figure 1 This is a schematic diagram of the system architecture used in the embodiments of this application. For example... Figure 1 As shown, the embodiments of this application are mainly applied to 5G systems with repeaters, or 5G evolution systems with repeaters. The network elements involved in the embodiments of this application include network devices, repeaters, and terminal devices.

[0096] Figure 2 This is a schematic diagram of a network device periodically sending SSBs according to an embodiment of this application.

[0097] like Figure 2 As shown, the network device periodically transmits multiple different SSBs within each first cycle, and each SSB can use different spatial transmission parameters. Within each first cycle, the network device transmits multiple SSBs with the same pattern; within different first cycles, the network device uses the same spatial transmission parameters to transmit the same SSB.

[0098] For example, the first cycle can be as follows: Figure 2 The SSB period is shown. For example, the spatial transmission parameters can be the filter parameters described above.

[0099] Each SSB includes index indication information, which indicates the index of the SSB. This index, along with a first mapping relationship, is used to determine the multiple associated Returns (ROs) corresponding to that SSB. The SSB index is used to distinguish SSBs within an SSB cycle; typically, different SSB indices correspond to different SSBs using different transmission beams. For example, ... Figure 2 SSB1 and SSB2 shown are two SSBs with different transmission beams, and SSB1 and SSB2 correspond to different SSB indices. It should be understood that different SSBs correspond to different indices.

[0100] For example, the first mapping relationship can be a mapping relationship between the index of an SSB and the RO, that is, the first mapping relationship can be used to determine the RO that transmits random access signals corresponding to different SSB indices.

[0101] For example, the index of the SSB and the time-frequency configuration information of the multiple associated ROs corresponding to the SSB determined by the first mapping relationship are located in the system information block (SIB) associated with the SSB. The time-frequency configuration information includes the frequency domain location information and time domain location information of the ROs.

[0102] Optionally, the frequency domain location information includes the number L of ROs in the frequency domain, where L is an integer. The frequency domain location information may also include the number of ROs in the frequency domain for each time unit containing ROs. Furthermore, the frequency domain location information may include the starting frequency position of the frequency domain ROs, the frequency interval of the frequency domain ROs, etc.

[0103] Optionally, the time-domain location information includes the configuration period of the physical random access channel (PRACH), which is typically measured in system frames. This configuration period indicates how many system frames a system frame containing an RO will appear. The time-domain location information may also include, within each system frame containing an RO, the time slot containing the RO resource, and the number of RO resources included in each time slot.

[0104] It should be noted that in a time division duplex (TDD) system, certain routes of origin (ROs) may be unavailable. Available or valid ROs may need to meet certain conditions, such as not containing downlink symbols or overlapping with symbols of the service branch bus (SSB). This application does not describe these conditions in detail in its embodiments.

[0105] Optionally, the time-frequency configuration information also includes the number N of SSBs associated with each RO. Optionally, this parameter N can be used for the specific mapping between SSBs and valid ROs. For example, when N is less than 1, in one round of mapping, an SSB can be mapped to 1 / N consecutive ROs, where 1 / N is a positive integer. In one round of mapping, all SSB indices are mapped to at least one RO. As another example, when N is greater than or equal to 1, in one round of mapping, N consecutive SSBs can be mapped to one RO, meaning N SSBs share one RO. It should be noted that this situation can be further mapped within an RO to different leading sequences via SSBs, which will not be described in detail here.

[0106] The following will be through Figure 3 An example is provided for a round of mapping when N is less than 1. Figure 3 This is an exemplary schematic diagram of a round of mapping when N is less than 1, provided in an embodiment of this application.

[0107] like Figure 3 As shown in (a), one round of mapping between SSB and RO includes two time units. The RO corresponding to the four SSB1s in time unit 1 represents one round of mapping of SSB1. Figure 3 As shown in (b), one round of mapping between SSB and RO includes 4 time units, and the RO corresponding to the 8 SSB1 in time unit 1 and time unit 2 represents one round of mapping of SSB1.

[0108] In some embodiments, the terminal device can map the first SSB to a valid RO based on the time-frequency configuration information determined by the SSB index and the first mapping relationship described above. Optionally, the terminal device can map the SSB to a valid RO in the order of frequency mapping followed by time mapping.

[0109] By mapping SSB and RO, network devices can align the beam direction of receiving random access signals with the beam direction of transmitting SSB on the corresponding RO, thereby achieving alignment between the transmitting beam of the terminal device transmitting random access signals and the receiving beam of the network device receiving random access signals on the corresponding RO.

[0110] The following is through Figure 4 A brief introduction to the three periods in the mapping. Figure 4 This is a schematic diagram of the three cycles in the RO mapping relationship. For example... Figure 4 As shown, there are three types of cycles: the PRACH configuration cycle introduced earlier, the association period (AP), and the association pattern period (APP).

[0111] like Figure 4 As shown, an AP includes one or more of the above-mentioned PRACH configuration cycles. For example, AP1 includes four PRACH cycles. The PRACH cycle indicates how many system frames in the time domain will cause a RO to occur.

[0112] For example, in an AP, all SSBs are associated with at least one valid RO. In different APs, the location of the valid RO may differ (e.g., some APs have no SSBs, while others do), resulting in different patterns of the mapping relationship between SSBs and valid ROs in different APs. For example, the SSB mapping patterns are different in AP1 and AP2.

[0113] For the reasons mentioned above, an App is defined. An App includes one or more Apps. For example... Figure 4 As shown, in each APP, the mapping pattern between SSB and effective RO is the same, or the mapping pattern between SSB and effective RO repeats periodically according to the APP. Figure 5 This is an example of a method for determining the timing of a random access signal (RO) provided in an embodiment of this application. In this method 500, the network device follows... Figure 2 The SSB is sent periodically as shown. Figure 5 As shown, the method 500 includes:

[0114] In the S510, the repeater receives and forwards the first SSB according to the first cycle. Correspondingly, network devices can receive or forward multiple SSBs in each first cycle.

[0115] Optionally, the first cycle can be an SSB cycle.

[0116] Optionally, the repeater can be a radio frequency repeater, a smart repeater, or any type of repeater in the future. It should be understood that the embodiments of this application do not limit the type of repeater, as long as the repeater has functions such as signal forwarding.

[0117] The corresponding airspace transmission parameters or the SSB of the transmission beam directed toward the repeater can be received and forwarded by the repeater.

[0118] It should be noted that the spatial reception parameters of the repeater receiving the SSB can also be fixed or optional, and these spatial reception parameters are determined through the beam training process.

[0119] In the embodiments of this application, it is assumed that one of the SSBs that can be received by the repeater is the first SSB, and the following description will be based on the first SSB.

[0120] For example, in each first cycle, the repeater receives the first SSB, and the repeater can forward the first SSB using one of the M spatial transmission parameters.

[0121] Optionally, the airspace transmission parameters used to forward the first SSB in the x-th first period are the same as those used in the (x+M)-th first period. Here, M is a positive integer, and x is a positive integer.

[0122] It should be noted that other rules can also be used to determine the spatial transmission parameters for forwarding the first SSB in each first cycle, and this application embodiment does not limit this. In other words, it can be understood that M first cycles constitute one large cycle, and the repeater uses one of the M different spatial transmission parameters to forward the first SSB in each first cycle within a large cycle, and repeats the above process from the next large cycle.

[0123] Optionally, M is related to the relative position of the network device and the repeater. Alternatively, M is related to its corresponding SSB, or M is related to the nature of the repeater. Alternatively, M can be configured by the network device for the repeater, or M can be determined by the repeater itself and then reported to the network device.

[0124] For example, Figure 6 This is a schematic diagram of a repeater receiving and forwarding the first SSB in multiple first cycles. For example... Figure 6 As shown, for example, assuming M is 2, then 2 first cycles (i.e. SSB cycles) constitute one large cycle. Figure 6 The first SSB in the sequence corresponds to SSB1, which is the SSB received by the repeater. The repeater in... Figure 6 The first cycle shown indicates that the first SSB, i.e., SSB1, is forwarded to the beam direction of SSB1-1. The repeater in Figure 6 The second first cycle shown forwards the first SSB, i.e., SSB1, to the beam direction of SSB1-2. The repeater in Figure 6 The repeater relays the first SSB, i.e., SSB1, to the beam direction of SSB1-1 during the third first cycle shown. Figure 6 The fourth first cycle is shown to forward the first SSB, i.e., SSB1, to the beam direction of SSB1-2, and so on.

[0125] It should be noted that the repeater forwarding the first SSB in a polling manner according to the first cycle is only one form of the repeater forwarding the first SSB. The repeater can also forward the first SSB according to other rules. This application uses this as an example for illustration, but this application does not limit it.

[0126] It should be noted that not all first SSBs transmitted by repeaters using different spatial domain transmission parameters or transmission beams can be received by the terminal device. Alternatively, among the first SSBs transmitted by repeaters using different spatial domain transmission parameters or transmission beams, some first SSBs can be received by the terminal device with a stronger RSRP, while others can be received by the terminal device with a weaker RSRP.

[0127] It should be noted that a repeater can forward multiple different SSBs within a first cycle. Optionally, this includes the first SSB. In other words, multiple different SSBs sent by the network device within the first cycle may be received by the repeater, and the repeater can forward multiple different SSBs. When the repeater forwards multiple different SSBs, the steps related to a single SSB in the embodiments of this application can be applied to multiple different SSBs without affecting the essence of the embodiments of this application, and will not be described in detail here.

[0128] S520, the repeater determines multiple associated ROs based on the index of the first SSB and the first mapping relationship.

[0129] It should be noted that this step is related to Figure 2 The method for determining multiple associated ROs corresponding to an SSB is similar and can be referred to in the previous description, so it will not be repeated here.

[0130] S530, the repeater uses the second spatial domain reception parameters to receive random access signals in the y-th group of ROs. The y-th group of ROs belongs to the M-th group of ROs. The M-th group of ROs is obtained by grouping multiple associated ROs according to the second mapping relationship.

[0131] For example, y can be any integer from 1 to M. In other words, the repeater receives random access signals using the corresponding second spatial reception parameters on one or more of the groups 1 to M of RO, or the repeater directs the receiving beam toward the corresponding direction on one or more of the groups 1 to M of RO.

[0132] It should be understood that the second spatial reception parameter used by the repeater on the y-th RO group is the spatial reception parameter corresponding to the spatial transmission parameter used to forward the first SSB in the (y+C)-th first period. Here, C is an integer greater than or equal to 0, and y is a positive integer less than or equal to M.

[0133] The following section will explain how the repeater divides multiple associated ROs into M groups of ROs based on the second mapping relationship.

[0134] Optional, Figure 2 The parameters N, L, and M mentioned above can satisfy the following relation: Where K is a positive integer.

[0135] The second mapping relationship can be: the multiple associated ROs corresponding to the first SSB include ROs of multiple rounds of mapping, and the ROs of each round of mapping include K*M ROs, and the (y-1)*K*L+1 to y*K*L ROs in each round of mapping correspond to the y-th group of ROs.

[0136] Here, each round of mapping is a round of mapping in a multi-round mapping, and the meaning of each round of mapping in a multi-round mapping is the same as that of the single-round mapping mentioned above.

[0137] Figure 7 This is a schematic diagram illustrating an example of the second mapping relationship. For example... Figure 7 As shown, L = 4, 1 / N = 8, K = 1, M = 2. At this point, the number of frequency domain ROs is 4. Each SSB maps 8 ROs in one round of mapping, occupying two time units of ROs. Therefore, the repeater's first second spatial domain receiving parameter corresponds to the 4 ROs in the first time unit, and the repeater's second second spatial domain receiving parameter corresponds to the 4 ROs in the second time unit. In other words, the repeater adjusts the receiving beam parameters to the first second spatial domain receiving parameters for the 4 ROs corresponding to the first time unit, and adjusts the receiving beam parameters to the second second spatial domain receiving parameters for the 4 ROs corresponding to the second time unit.

[0138] Optionally, the second mapping relationship can be: among the multiple associated ROs corresponding to the first SSB, the ROs included in the y-th AP among every M APs are the y-th group of ROs. Where M = B * A, A is the number of APs included in an APP determined according to the first mapping relationship, and B is the number of APs included in the B APPs determined according to the first mapping relationship. A and B are positive integers.

[0139] like Figure 8 The diagram illustrates another example of the second mapping relationship. Optionally, this second mapping relationship can be: among the multiple associated ROs corresponding to the first SSB, the ROs included in the (y+D*M)th AP of each APP belong to the yth group of ROs, or, the ROs included in the (D+y*D)th AP of each APP belong to the yth group of ROs. Where A = D*M, and A is the number of APs included in an APP determined according to the first mapping relationship. A and D are positive integers.

[0140] like Figure 9 The diagram illustrates another example of the second mapping relationship. Optionally, this second mapping relationship can be: the RO included in the j-th AP of the i-th APP among the multiple associated ROs corresponding to the first SSB belongs to the y-th group of ROs. Here, y can be mod[(i-1)*A+j-1, M], and A is the number of APs included in an APP determined according to the first mapping relationship. A, i, and j are all positive integers.

[0141] It should be noted that, based on the second mapping relationship mentioned above, the repeater can determine the 1st to Mth groups of ROs from the multiple associated ROs corresponding to the first SSB, which correspond to M second spatial domain receiving parameters respectively.

[0142] Optionally, the repeater can align the parameters of the receiving beam with the corresponding second spatial receiving parameters on one or more of the M groups of ROs.

[0143] It should be understood that the repeater may receive a random access signal in one of the ROs of group M.

[0144] S540, the terminal device receives the target first SSB and determines multiple associated ROs based on the index of the first SSB and the first mapping relationship.

[0145] For example, the target first SSB can be the first SSB with the strongest RSRP received by the terminal device, or it can be a first SSB with an RSRP exceeding a first threshold. Optionally, the first threshold is a preset value.

[0146] It should be noted that the target first SSB is one of the multiple first SSBs forwarded by the repeater in multiple first cycles.

[0147] The terminal device can determine multiple associated ROs based on the index of the first SSB and the first mapping relationship. The method by which the terminal device determines multiple associated ROs based on the index of the first SSB and the first mapping relationship is the same as described above. Figure 2 The method shown is similar and can be referred to. Figure 2 The methods shown will not be repeated here.

[0148] S550, the terminal device determines the first identifier corresponding to the target first SSB, and determines the first RO set from multiple associated ROs based on the first identifier corresponding to the target first SSB and the second mapping relationship.

[0149] It should be noted that the first identifier corresponding to the first SSB of this target is different from the first identifier corresponding to other first SSBs forwarded by the repeater.

[0150] For example, the terminal device determines the first RO set from multiple associated ROs based on the first identifier corresponding to the target first SSB and the second mapping relationship. This can be achieved by the terminal device determining the m-th RO in M ​​groups of ROs as the first RO set based on the first identifier corresponding to the target first SSB.

[0151] Where m is a positive integer less than or equal to M. The M groups of ROs are obtained by grouping multiple associated ROs according to the second mapping relationship.

[0152] Optionally, the terminal device can determine M through the first indication information.

[0153] Specifically, the first indication information is associated with the target first SSB. Optionally, the first indication information may be located in the payload of the target first SSB or in the MIB within the target first SSB. Optionally, the first indication information may be located in the SIB, and the association between the SIB and the first SSB can be understood as the SIB being scheduled by the Physical Downlink Control Channel (PDCCH) / Downlink Control Information (DCI) on the resource set (CORESET) and / or search space indicated by the MIB in the target first SSB.

[0154] Optionally, the terminal device can determine M by measuring the target first SSB. For example, the terminal device can measure the RSRP time series of multiple first SSBs, extract the period of RSRP change from the time series, and further determine M.

[0155] Optionally, the terminal device can determine M through other indication information from the network device. It should be noted that this indication information is sent from the network device to the terminal device when the terminal device is in a connected state.

[0156] For example, the terminal device also needs to determine the first identifier corresponding to the first SSB of the target. That is, m. Optionally, the terminal device can determine the first identifier corresponding to the first SSB of the target by measuring the first SSB of the target.

[0157] For example, the terminal device can determine the first identifier corresponding to the target first SSB by measuring the system frame number (SFN) where the target first SSB is located. For instance, when the terminal device detects the target first SSB in the system frame SFN (or, when the RSRP of the target first SSB detected in the system frame SFN is greater than or equal to the first identifier), it can determine that the first identifier corresponding to the target first SSB is:

[0158]

[0159] Among them, T frame The frame length is indicated, typically 10ms in NR systems, but can be other values. `half_frame` is a half-frame indicator, which can be 0 or 1, indicating whether the target's first SSB is located in the first or second half of a frame (10ms in length). T SSBThis indicates the period of the SSB. It should be noted that the mod function means taking the remainder when the first number inside the parentheses is divided by the second number inside the parentheses.

[0160] Optionally, the terminal device can determine the first identifier corresponding to the first SSB of the target through the second indication information.

[0161] The second indication information can be associated with the target first SSB. Optionally, the second indication information can be located in the payload indication information of the target first SSB, for example, in the SSB payload in NR R16. To reserve bits, the second indication information can be located in the reserved bits or in other newly set bits; this application embodiment does not limit this. Optionally, the second indication information can be located in the MIB carried by the target first SSB.

[0162] Optionally, the terminal device can determine the first identifier corresponding to the target first SSB through other indication information from the network device. For example, the network device can send indication information to the terminal device when the terminal device is in a connected state, indicating the first identifier corresponding to the target first SSB.

[0163] Furthermore, the terminal device can determine the m-th RO group, i.e. the first RO set corresponding to the first identifier, based on M, m and the second mapping relationship.

[0164] It should be noted that this second mapping relationship is similar to the description in step S530. In this step, it is only necessary to determine the m-th group of RO, which will not be repeated here.

[0165] It should be noted that before determining the first RO set based on M, m and the second mapping relationship, the terminal device needs to determine that it is being served by the repeater.

[0166] Optionally, the terminal device can determine that it is being served by the repeater by a third indication message sent by the network device when the terminal device is in a connected state. The third indication message is used to indicate that the terminal device is being served by the repeater.

[0167] Optionally, the terminal device can determine whether it is being served by a repeater by receiving the repeater's location indication information sent by the network device. For example, if the distance between the terminal device's geographical location and the geographical location of a certain repeater is less than a second threshold, the terminal device can determine that it is being served by a repeater. The network device can carry the repeater's location indication information in the MIB or SIB.

[0168] Optionally, the terminal device can determine whether it is being served by the repeater by measuring the RSRP value of the first SSB.

[0169] For example, if the variance or peak-to-average ratio of the RSRP of the first SSB is greater than the third threshold within multiple first cycles, the terminal device can determine that it is being served by the repeater.

[0170] For example, if the RSRP strength of the first SSB changes more than the fourth threshold within two adjacent first cycles, the terminal device can determine that it is being served by the repeater.

[0171] For example, if the non-zero frequency component of the normalized RSRP sequence of the first SSB is greater than the fifth threshold within multiple first cycles, the terminal device can determine that it is being served by the repeater.

[0172] S560, the terminal device sends a random access signal on one of the ROs included in the first RO set.

[0173] Optionally, the terminal device transmits a random access signal using a first spatial transmission parameter, which is the spatial transmission parameter corresponding to the first spatial reception parameter, and the first spatial reception parameter is the spatial reception parameter for the terminal device to receive the target first SSB.

[0174] It should be understood that the first spatial domain transmission parameters can be the same as the first spatial domain reception parameters. Alternatively, the first spatial domain transmission parameters can be similar to the first spatial domain reception parameters.

[0175] Optionally, the terminal device may use a first transmit beam to transmit a random access signal, wherein the first transmit beam is the transmit beam corresponding to the first receive beam, and the first receive beam is the receive beam for the terminal device to receive the target first SSB.

[0176] It should be understood that the first transmitting beam and the first receiving beam can be beams with similar parameters. For example, the first transmitting beam may be a coarse beam and the first receiving beam may be a fine beam, and the coarse beam may include the fine beam, etc.

[0177] It should be understood that the first transmitting beam and the first receiving beam can also be beams with the same parameters.

[0178] It should be noted that the order of steps S520-S560 is not fixed.

[0179] The method provided in this application embodiment enables the RO of the random access signal sent by the terminal device to be aligned with the RO of the random access signal received by the repeater. At the same time, the repeater uses a matching beam to receive the random access signal of the terminal device at the aligned RO, so that the repeater can receive the random access signal sent by the terminal device with a higher gain, without affecting the original SSB pattern sent by the network device.

[0180] Figure 10 This is a schematic diagram of another example of the method for determining RO provided in the embodiments of this application. Figure 10 The provided method has been changed, such as Figure 2 The network device described sends the SSB pattern, such as... Figure 10 As shown, the method 1000 includes:

[0181] S1010, the network device sends multiple sets of SSBs according to the second cycle.

[0182] It should be understood that the meaning of this second cycle is the same as the second cycle described above. Please refer to the above description; it will not be repeated here.

[0183] Figure 11 This is a schematic diagram illustrating how, in method 1000, the network device periodically sends SSBs according to the second cycle, and the repeater periodically forwards SSBs according to the second cycle. Figure 11 As shown, the network device transmits multiple sets of SSBs in each second cycle. Each SSB set includes Z SSBs, and the spatial transmission parameters for each SSB set are the same, but the indices of the Z SSBs are different. This second cycle corresponds to... Figure 11 The SSB period in the equation. Z is a positive integer greater than 1.

[0184] For example, such as Figure 11 As shown, the network device sends two sets of SSBs, where the value of Z is 2, meaning that each set of SSBs corresponds to two different SSBs. One set of SSBs corresponds to SSB1 and SSB2, and the other set of SSBs corresponds to SSB3 and SSB4.

[0185] It should be understood that the meaning of Z in method 1000 can be referred to the meaning of M above, and the meaning of the index and the meaning of the spatial domain transmission parameters can be referred to the above description, and will not be repeated here.

[0186] S1020, the repeater receives and forwards a group of SSBs according to the second cycle.

[0187] It should be understood that the repeater receives one set of SSBs in each second cycle and forwards multiple SSBs included in that set of SSBs using different spatial transmission parameters in each second cycle.

[0188] For example, such as Figure 11 As shown, the repeater receives SSB3 and SSB4, and forwards SSB3 and SSB4 using two different spatial transmission parameters respectively.

[0189] S1030, the terminal device receives the second SSB and determines multiple associated ROs based on the index of the second SSB and the first mapping relationship.

[0190] For example, the second SSB can be the SSB with the strongest RSRP received by the terminal device, or the second SSB can be an SSB with an RSRP exceeding the first threshold received by the terminal device.

[0191] The method by which the terminal device determines multiple associated ROs based on the index of the second SSB and the first mapping relationship is similar to the method described above for the terminal device to determine multiple associated ROs based on the index of the first SSB and the first mapping relationship, and will not be repeated here.

[0192] S1040, the terminal device sends a random access signal on one of the multiple associated ROs.

[0193] The spatial transmission parameters used by the terminal device to send random access signals can be found in the description in S560, and will not be repeated here.

[0194] S1050, the repeater determines the RO associated with each SSB based on the SSB index and the first mapping relationship, and receives random access signals on each RO associated with the SSB.

[0195] It should be noted that the description of the spatial reception parameters used by the repeater to receive random access signals can be found in step S530, and will not be repeated here. That is, the repeater uses the spatial reception parameters corresponding to the spatial transmission parameters of each SSB to receive the random access signal for each SSB.

[0196] It should be noted that the order of steps S1040 and S1050 is not fixed.

[0197] The method provided in this application, by changing the pattern of the SSB transmitted by the network device, can utilize the SSB index and the first mapping relationship to enable the repeater to receive the random access signal of the terminal device using a matched beam at the aligned RO, thereby enabling the repeater to receive the random access signal transmitted by the terminal device with higher gain.

[0198] Figure 12 This is an example of a communication device according to an embodiment of this application, such as... Figure 12 As shown, the communication device 1200 includes a transceiver unit 1210 and a processing unit 1220.

[0199] In some embodiments, the communication device 1200 can be used to implement the functions of the terminal device involved in any of the methods described above. For example, the communication device 1200 can correspond to a terminal device.

[0200] The communication device 1200 can be a terminal device and executes the steps performed by the terminal device in the above method embodiments. The transceiver unit 1210 can be used to support the communication device 1200 in communication, for example, to execute the sending and / or receiving actions performed by the terminal device in the above method embodiments. The processing unit 1220 can be used to support the communication device 1200 in executing the processing actions in the above method embodiments, for example, to execute the processing actions performed by the terminal device in the above method embodiments.

[0201] Optionally, the communication device may also include a storage unit 1230. Figure 10 (Not shown in the image), used to store the program code and data of the communication device.

[0202] For details, please refer to the following description:

[0203] Transceiver unit 1210: Used to receive target first synchronization signal block SSB, the target first SSB is one of multiple first SSBs forwarded by the repeater, each first SSB contains index indication information, the index indication information is used to indicate the index of the first SSB.

[0204] Processing unit 1220: used to determine multiple associated random access signal timings RO based on the index of the first SSB and the first mapping relationship.

[0205] The processing unit 1220 is further configured to determine an identifier corresponding to the target first SSB, and to determine a first RO set from multiple associated ROs based on the first identifier and the second mapping relationship corresponding to the target first SSB, wherein the first RO set includes at least one RO.

[0206] The transceiver unit 1210 is also used to transmit random access signals on one of the ROs included in the first RO set.

[0207] The processing unit 1220 is further configured to determine a first RO set from multiple associated ROs based on a first identifier and a second mapping relationship corresponding to the target first SSB, including: the processing unit 1220 is configured to determine that the first RO set from multiple associated ROs includes M groups of ROs, and to determine the m-th group of ROs in the M groups of ROs as the first RO set based on the first identifier corresponding to the target first SSB, where M is a positive integer, m is a positive integer less than or equal to M, and the M groups of ROs are obtained by grouping multiple associated ROs according to the second mapping relationship.

[0208] The processing unit 1220 is further configured to determine multiple associated ROs based on the index of the first SSB and the first mapping relationship, including: the processing unit is configured to determine the time-frequency resource configuration information of multiple associated ROs based on the index of the first SSB and the first mapping relationship, wherein the time-frequency resource configuration information includes parameters N and L, where 1 / N represents the number of ROs associated with each SSB in each round of mapping between SSB and RO, and L represents the number of ROs in the frequency domain corresponding to each time unit with RO.

[0209] Optionally, N, L, and M satisfy the following relationship: K is a positive integer. The second mapping relationship is: multiple associated ROs include ROs of multiple rounds of mapping. Each round of mapping includes K*M ROs. In each round of mapping, the (m-1)*K*L+1 to the m*K*L ROs correspond to the m group of ROs.

[0210] Optionally, the second mapping relationship is: the RO included in the j-th associated period AP of the i-th associated pattern period APP among multiple associated ROs belongs to the m-th group of ROs, where m = mod[(i-1)*A+j-1, M], A is the number of APs included in an APP determined according to the first mapping relationship, and A, i, and j are positive integers.

[0211] Optionally, M is indicated by first indication information, or M is determined by processing unit 1220 by measuring multiple first SSBs, wherein the first indication information is associated with a target first SSB.

[0212] Optionally, m is indicated by the second indication information, or m is determined by the processing unit 1220 by measuring multiple first SSBs and a target first SSB, wherein the second indication information is associated with the target first SSB.

[0213] Optionally, the processing unit 1220 is further configured to determine that the communication device is served by the repeater based on third indication information, the third indication information being used to indicate that the communication device is served by the repeater, or the processing unit 1220 determines that the communication device is served by the repeater by measuring a plurality of first SSBs.

[0214] Optionally, the transceiver unit 1210 is used to receive the target first SSB, including:

[0215] The transceiver unit 1210 is used to receive the first SSB of the target using the first spatial domain reception parameters.

[0216] Optionally, the transceiver unit 1210 is configured to transmit random access signals on the ROs included in the first RO set, including:

[0217] The transceiver unit 1210 is used to transmit random access signals on the ROs included in the first RO set using a first spatial transmission parameter, wherein the first spatial transmission parameter is a spatial transmission parameter corresponding to the first spatial reception parameter.

[0218] In some embodiments, the communication device 1200 can be used to implement the function of a repeater involved in any of the methods described above. For example, the communication device 1200 can correspond to a repeater.

[0219] The communication device 1200 can be a repeater and executes the steps performed by the repeater in the above method embodiments. The transceiver unit 1210 can be used to support the communication device 1200 in communication, for example, to perform the sending and / or receiving actions performed by the repeater in the above method embodiments. The processing unit 1220 can be used to support the communication device 1200 in performing the processing actions in the above method embodiments, for example, to perform the processing actions performed by the repeater in the above method embodiments.

[0220] Optionally, the communication device may also include a storage unit 1230. Figure 12 (Not shown in the image), used to store the program code and data of the communication device.

[0221] For details, please refer to the following description:

[0222] Transceiver unit 1210: Used to receive and forward a first SSB according to a first cycle. The first SSB includes index indication information, which is used to indicate the index of the first SSB. In each first cycle, the repeater forwards the first SSB using one of the M spatial transmission parameters. The spatial transmission parameter used in the xth first cycle is the same as the spatial transmission parameter used in the (x+M)th first cycle, where M and x are positive integers.

[0223] Processing unit 1220: used to determine multiple associated ROs based on the index of the first SSB and the first mapping relationship.

[0224] The transceiver unit 1010 is also used to receive random access signals using the second spatial receiving parameters on the y-th group of ROs. The y-th group of ROs is one of the M groups of ROs. The M groups of ROs are obtained by grouping multiple associated ROs according to the second mapping relationship. The second spatial receiving parameters are the spatial receiving parameters corresponding to the spatial transmission parameters used to forward the first SSB in the (y+C)-th first period, where C is an integer greater than or equal to zero and y is a positive integer less than or equal to M.

[0225] Optionally, N, L, and M satisfy the following relationship: Where K is a positive integer, the second mapping relationship is: multiple associated ROs include ROs of multiple rounds of mapping, each round of mapping includes K*M ROs, and the (y-1)*K*L+1 to y*K*L ROs in each round of mapping correspond to the y-th group of ROs.

[0226] Optionally, the second mapping relationship is: the RO included in the j-th associated period AP of the i-th associated pattern period APP among multiple associated ROs belongs to the y-th group of ROs, where y = mod[(i-1)*A+j-1, M], A is the number of APs included in an APP determined according to the first mapping relationship, and A, i, and j are positive integers.

[0227] Figure 13 This is an example of the signal transmission device 1300 provided in the embodiments of this application. For example... Figure 13 As shown, the device 1300 includes a transceiver 1310, a processor 1320, and a memory 1330. The memory 1330 is used to store instructions. The processor 1320 is coupled to the memory 1330 and is used to execute the instructions stored in the memory to perform the methods provided in the embodiments of this application described above.

[0228] Specifically, the transceiver 1310 in the device 1300 can correspond to the transceiver unit 1210 in the device 1200, and the processor 1320 in the communication device 1300 can correspond to the processing unit 1220 in the communication device 1200.

[0229] It should be understood that the memory 1330 and processor 1320 can be combined into a single processing device, with processor 1320 executing the program code stored in memory 1330 to achieve the aforementioned functions. In specific implementations, memory 1330 can be integrated into processor 1320 or independent of processor 1310.

[0230] Figure 14 This is a schematic diagram of yet another example of a communication device according to an embodiment of this application. This communication device can be used to execute the methods performed by the repeater or terminal device described above, such as... Figure 14 As shown, the communication device includes:

[0231] The system includes at least one input interface (Input(s)) 1410, logic circuitry 1420, and at least one output interface (Output(s)) 1430. Optionally, the logic circuitry described above may be a chip or other integrated circuit capable of implementing the method of this application.

[0232] Input interface 1410 is used to input or receive data; output interface 1430 is used to output or send data; logic circuit 1420 is used to perform the above-mentioned operations. Figure 5 The various possible methods described.

[0233] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0234] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0235] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0236] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0237] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0238] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0239] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for determining the timing (RO) of a random access signal, characterized in that, Comprising: A terminal device receives a target first synchronization signal physical broadcast channel block (SSB), the target first SSB being one of a plurality of first SSBs forwarded by a relay, each first SSB containing index indication information for indicating an index of the first SSB, and a plurality of associated random access signal occasions (ROs) being determined according to the index of the first SSB and a first mapping relationship; The terminal device determines a first identity corresponding to the target first SSB, and determines a first RO set from the plurality of associated ROs according to the first identity corresponding to the target first SSB and a second mapping relationship, the first RO set including at least one RO; The terminal device sends a random access signal on an RO included in the first RO set.

2. The method of claim 1, wherein, The determination of the first RO set from the plurality of associated ROs according to the first identity corresponding to the target first SSB and the second mapping relationship comprises: The first RO set is determined from the plurality of associated ROs, and the mth group of ROs in the M groups of ROs is determined as the first RO set according to the first identity corresponding to the target first SSB, the M being a positive integer, the m being a positive integer less than or equal to the M, and the M groups of ROs being obtained by grouping the plurality of associated ROs according to the second mapping relationship.

3. The method according to claim 1 or 2, characterized in that, The determination of the plurality of associated ROs according to the index of the first SSB and the first mapping relationship comprises: The time-frequency resource configuration information of the plurality of associated ROs is determined according to the index of the first SSB and the first mapping relationship, the time-frequency resource configuration information including parameters N and L, 1 / N representing the number of ROs associated with each SSB in each round of mapping between SSBs and ROs, and L representing the number of corresponding ROs in the frequency domain on each time unit with ROs.

4. The method of claim 3, wherein, The first RO set includes M groups of ROs, and N, L, and M satisfy the following relationship: K is a positive integer, and the second mapping relationship is as follows: the multiple associated ROs include ROs from multiple rounds of mapping, each round of mapping includes K*M ROs, and in each round of mapping, the RO of the first round is... Each RO corresponds to the m-th RO in the M groups of ROs.

5. The method of claim 3, wherein, The first RO set includes M groups of ROs, and the second mapping relationship is that an RO included in a jth associated period (AP) in an ith associated AP period (APP) in the plurality of associated ROs belongs to an mth group of ROs in the M groups of ROs, where m=mod[(i-1)*A+j-1, M], A is the number of APs included in an APP determined according to the first mapping relationship, and A, i, and j are positive integers.

6. The method of claim 2, wherein, The M is indicated by first indication information or determined by the terminal device by measuring the plurality of first SSBs, wherein the first indication information is associated with the target first SSB.

7. The method of claim 2, wherein, The m is indicated by second indication information or determined by the terminal device by measuring the plurality of first SSBs and the target first SSB, wherein the second indication information is associated with the target first SSB.

8. The method of claim 1 or 2, wherein, The method further comprises: The terminal device determines that the terminal device is served by the relay according to third indication information, the third indication information being used to indicate that the terminal device is served by the relay, or The terminal device determines that the terminal device is served by the relay by measuring the plurality of first SSBs.

9. The method of claim 1 or 2, wherein, The terminal device receives a target first SSB, comprising: The terminal device receives the target first SSB using a first spatial domain receiving parameter; The terminal device transmits a random access signal on an RO included in the first RO set, including: The terminal device transmits the random access signal on the RO included in the first RO set using a first spatial domain transmitting parameter, which is a spatial domain transmitting parameter corresponding to the first spatial domain receiving parameter.

10. A method for determining the timing (RO) of a random access signal, characterized in that, Including: The repeater receives and forwards a first synchronization signal physical broadcast channel block SSB according to a first period, the first SSB includes index indication information, the index indication information is used to indicate the index of the first SSB, and in each first period, the repeater forwards the first SSB using one of M spatial domain transmitting parameters, wherein the spatial domain transmitting parameter used in the xth first period is the same as the spatial domain transmitting parameter used in the x+Mth first period, and the M and the x are positive integers; The repeater determines a plurality of associated ROs according to the index of the first SSB and a first mapping relationship; The repeater receives a random access signal on a yth group of ROs using a second spatial domain receiving parameter, the yth group of ROs is one of M groups of ROs, the M groups of ROs are obtained by grouping the plurality of associated ROs according to a second mapping relationship, and the second spatial domain receiving parameter is a spatial domain receiving parameter corresponding to the spatial domain transmitting parameter used for forwarding the first SSB in the y+Cth first period, C is an integer greater than or equal to zero, and y is a positive integer less than or equal to M.

11. The method of claim 10, wherein, The repeater determines a plurality of associated ROs according to the index of the first SSB and a first mapping relationship, including: The repeater determines time-frequency resource configuration information of the plurality of associated ROs according to the index of the first SSB and a first mapping relationship, the time-frequency resource configuration information includes parameters N and L, 1 / N represents the number of ROs associated with each SSB in each round of mapping of SSB and RO, and L represents the number of corresponding ROs in the frequency domain on each time unit with RO.

12. The method according to claim 10 or 11, characterized in that, The N, the L and the M satisfy the relationship: The K is a positive integer, and the second mapping relationship is that the multiple associated ROs include multiple rounds of mapped ROs, each round of mapped ROs includes K*M ROs, and the first RO in each round of mapping corresponds to the yth group of ROs.

13. The method of claim 10 or 11, wherein, The second mapping relationship is that the RO included in the jth associated period AP in the ith associated pattern period APP in the plurality of associated ROs belongs to the yth group of ROs, where y=mod[(i-1)*A+j-1,M], A is the number of APs included in one APP determined according to the first mapping relationship, and A, i and j are positive integers.

14. A communication device for determining the timing RO of a random access signal, characterized in that, Including: The transceiver unit is configured to receive a target first synchronization signal physical broadcast channel block SSB, the target first SSB being one of a plurality of first SSBs forwarded by a repeater, each first SSB containing index indication information, the index indication information being used to indicate the index of the first SSB; The processing unit is configured to determine a plurality of associated random access signal occasions ROs according to the index of the first SSB and a first mapping relationship; The processing unit is further configured to determine a first identifier corresponding to the target first SSB, and determine a first RO set from the multiple associated ROs according to the first identifier corresponding to the target first SSB and a second mapping relationship, the first RO set including at least one RO. The transceiving unit is further configured to send a random access signal on an RO included in the first RO set.

15. The communication apparatus according to claim 14, wherein The processing unit is configured to determine the first RO set from the multiple associated ROs according to the first identifier corresponding to the target first SSB and the second mapping relationship, including: The processing unit is configured to determine the first RO set from the multiple associated ROs, and determine an mth RO group in the M RO groups as the first RO set according to the first identifier corresponding to the target first SSB, where M is a positive integer, m is a positive integer less than or equal to M, and the M RO groups are obtained by grouping the multiple associated ROs according to the second mapping relationship.

16. The communication apparatus according to claim 14 or 15, characterized by The processing unit is configured to determine the multiple associated ROs according to the index of the first SSB and a first mapping relationship, including: The processing unit is configured to determine time-frequency resource configuration information of the multiple associated ROs according to the index of the first SSB and the first mapping relationship, the time-frequency resource configuration information including parameters N and L, 1 / N representing a number of ROs associated with each SSB in each round of mapping between SSBs and ROs, and L representing a number of corresponding ROs in a frequency domain on each time unit with ROs.

17. The communication apparatus according to claim 16, wherein The first RO set includes M groups of ROs, and N, L, and M satisfy the following relationship: K is a positive integer, and the second mapping relationship is as follows: the multiple associated ROs include ROs from multiple rounds of mapping, each round of mapping includes K*M ROs, and in each round of mapping, the RO of the first round is... Each RO corresponds to the m-th RO in the M groups of ROs.

18. The communication apparatus according to claim 16, wherein The first RO set includes M RO groups, and the second mapping relationship is that an RO included in a jth associated period AP in an ith associated pattern period APP in the multiple associated ROs belongs to an mth RO group in the M RO groups, where m = mod[(i-1)*A+j-1, M], A is a number of APs included in an APP determined according to the first mapping relationship, and A, i, and j are positive integers.

19. The communication apparatus according to claim 15, wherein The M is indicated by first indication information or determined by the processing unit by measuring the multiple first SSBs, where the first indication information is associated with the target first SSB.

20. The communication apparatus according to claim 15, wherein The m is indicated by second indication information or determined by the processing unit by measuring the multiple first SSBs and the target first SSB, where the second indication information is associated with the target first SSB.

21. The communication apparatus according to claim 14 or 15, characterized in that, The processing unit is further configured to: determine that the communication apparatus is served by the relay according to third indication information, the third indication information being used to indicate that the communication apparatus is served by the relay, or determine that the communication apparatus is served by the relay by measuring the multiple first SSBs.

22. The communication apparatus according to claim 14 or 15, wherein the transceiving unit is configured to receive a target first SSB, including: the transceiving unit is configured to receive the target first SSB using first spatial domain reception parameters; the transceiving unit is configured to send a random access signal on an RO included in the first RO set, including: The transceiver is configured to transmit the random access signal using a first spatial domain transmission parameter on the RO included in the first RO set, the first spatial domain transmission parameter being a spatial domain transmission parameter corresponding to the first spatial domain reception parameter.

23. A communication device for determining the timing RO of a random access signal, characterized in that, Comprise: A transceiver configured to receive and forward a first synchronization signal physical broadcast channel block (SSB) according to a first period, the first SSB comprising index indication information, the index indication information being used to indicate an index of the first SSB, and the transceiver being configured to forward the first SSB using one of M spatial domain transmission parameters in each first period, wherein the spatial domain transmission parameter used in the xth first period is the same as the spatial domain transmission parameter used in the x+Mth first period, and the M and the x are positive integers; A processing unit configured to determine a plurality of associated ROs according to the index of the first SSB and a first mapping relationship; The transceiver is further configured to receive a random access signal using a second spatial domain reception parameter on a yth group of ROs, the yth group of ROs being one of M groups of ROs, and the M groups of ROs being obtained by grouping the plurality of associated ROs according to a second mapping relationship, and the second spatial domain reception parameter being a spatial domain reception parameter corresponding to the spatial domain transmission parameter used for forwarding the first SSB in the y+Cth first period, the C being an integer greater than or equal to zero, and the y being a positive integer less than or equal to the M.

24. The communication apparatus according to claim 23, wherein, The processing unit is configured to determine a plurality of associated ROs according to the index of the first SSB and a first mapping relationship, comprising: The processing unit is configured to determine time-frequency resource configuration information of the plurality of associated ROs according to the index of the first SSB and a first mapping relationship, the time-frequency resource configuration information comprising parameters N and L, 1 / N representing the number of ROs associated with each SSB in each round of mapping between SSBs and ROs, and L representing the number of corresponding ROs in the frequency domain on each time unit with ROs.

25. The communication apparatus according to claim 23 or 24, wherein, The N, the L and the M satisfy the relationship: The K is a positive integer, and the second mapping relationship is that the plurality of associated ROs include a plurality of rounds of mapped ROs, each round of mapped ROs includes K*M ROs, and the first RO in each round of mapping corresponds to the yth group of ROs.

26. The communication apparatus according to claim 23 or 24, wherein, The second mapping relationship is that the jth associated period AP in the ith associated pattern period APP of the plurality of associated ROs includes ROs belonging to the yth group of ROs, wherein y=mod[(i-1)*A+j-1, M], A is the number of APs included in one APP determined according to the first mapping relationship, and A, i and j are positive integers.

27. A communications device, characterized by Comprise at least one processor coupled to a memory: The memory is configured to store program instructions and data; The processor is configured to execute the instructions in the memory to implement the method of any one of claims 1 to 9 or claims 10 to 13.

28. A communications device, characterized by Comprise a logic circuit and an input / output interface: The input / output interface is configured to input or output data or information; The logic circuit is configured to execute the method of any one of claims 1 to 9 or 10 to 13 according to the data or information.

29. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions, when the computer instructions run on a computer, make the computer execute the method of any one of claims 1 to 13.

30. A computer program product comprising instructions, wherein: when it is run on a computer, causes the method of any one of claims 1 to 9 to be performed, or causes the method of any one of claims 10 to 13 to be performed.

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