Uplink access method and communication device

Abstract

The application provides an uplink access method and a communication device, relates to the technical field of wireless communication, and can reduce the phenomenon of uplink access failure. The method comprises the following steps: a relay device receives at least one synchronization signal / physical broadcast channel block (SSB) from a network device and forwards the at least one SSB, wherein each SSB in the at least one SSB has an index, and the index is associated with a plurality of random access channel opportunities (ROs). The relay device receives an uplink access signal from a terminal on a first RO by using a first spatial domain receiving parameter, wherein the first RO is one of the ROs associated with one of the indexes of the at least one SSB, the first spatial domain receiving parameter is determined according to a first spatial domain sending parameter used by the relay device for forwarding a first SSB, the first SSB is one of the at least one second SSB that is closest to the first RO in the time domain, and the second SSB is an SSB that meets a preset condition in the at least one SSB.

Description

[0001] This application claims priority to the Chinese Patent Application No. 202210141763.2, filed on February 16, 2022, entitled "An Uplink Access Method, Network Relay Device, Network Device and Electronic Device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of wireless communication, in particular to an uplink access method and a communication device. BACKGROUND

[0003] The relay device receives a synchronization signal / physical broadcast channel block (SSB) of the network device and forwards it to the terminal to synchronize the terminal with the network device. There is an association relationship between the index of the SSB and the random access channel occasion (RO). For a certain RO in the multiple ROs associated with a certain index, the relay device receives the uplink access signal from the terminal using the spatial domain reception parameter on the RO. However, the receiving beam corresponding to the spatial domain reception parameter may not be aligned with the terminal, resulting in uplink access failure of the terminal. SUMMARY

[0004] The present application provides an uplink access method and a communication device, which can reduce the phenomenon of uplink access failure. To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0005] In a first aspect, an uplink access method is provided. The execution subject of the method can be a relay device or a chip applied in the relay device. Hereinafter, the execution subject is taken as the relay device for description. The method comprises: receiving at least one synchronization signal / physical broadcast channel block (SSB) from a network device by the relay device, and forwarding the at least one SSB. Each SSB in the at least one SSB has an index, and the index is associated with multiple random access channel occasions (ROs). The relay device uses a spatial domain transmission parameter when forwarding each SSB in the at least one SSB. Then, the relay device receives an uplink access signal from a terminal using a first spatial domain reception parameter on a first RO. The first RO is one of the ROs associated with one of the indexes of the at least one SSB. The first spatial domain reception parameter is determined according to the first spatial domain transmission parameter used by the relay device when forwarding a first SSB. The first SSB is the one in the at least one second SSB that is closest to the first RO in the time domain, and the second SSB is the SSB in the at least one SSB that satisfies a predetermined condition.

[0006] The first SSB determined based on the above manner can be understood as an SSB received by the terminal, and the terminal initiates the uplink access signal on the first RO after receiving the first SSB. Since the first spatial domain transmission parameter corresponding to the first SSB is aligned to the terminal, the relay device determines the first spatial domain receiving parameter based on the first spatial domain transmission parameter, and the relay device uses the first spatial domain receiving parameter to align the receiving beam direction to the terminal, so that the relay device receives the uplink access signal of the terminal on the first RO, and reduces the phenomenon of uplink access failure. In addition, the network device, the relay device and the terminal in the embodiment of the present application do not need to expand the transmission pattern of the SSB, and the influence on the device is small.

[0007] In a possible design, the preset condition includes the following three items: the index of the second SSB is associated with the first RO, the second SSB is before the first RO, and the time interval between the second SSB and the first RO is greater than or equal to the first threshold.

[0008] In a possible design, the preset condition includes the following three items: the index of the second SSB is associated with the first RO, the second SSB is before the first RO, and the time interval between the second SSB and the first RO is greater than the first threshold.

[0009] In a possible design, the method further includes: receiving, by the relay device, configuration information from the network device, where the configuration information is used to configure RO time-frequency resources, and the RO time-frequency resources at least include time-frequency resources of the first RO. The relay device determines the association relationship between the index of the second SSB and the first RO according to the configuration information.

[0010] In this way, the relay device determines the association relationship between the index of the second SSB and the first RO based on the configuration information.

[0011] In a possible design, the method further includes: periodically forwarding, by the relay device, the SSB with the first index. Wherein the spatial domain transmission parameter used by the relay device to forward the SSB with the first index in the yth period is the same as the spatial domain transmission parameter used by the relay device to forward the SSB with the first index in the y+Mth period, the SSB with the first index is included in the at least one SSB, y and M are positive integers, and M≥2.

[0012] In a possible design, the method further includes: periodically forwarding, by the relay device, the at least one SSB. Wherein the SSB with the first index is included in the at least one SSB. The spatial domain transmission parameter used by the relay device to forward the SSB with the first index in the yth period is the same as the spatial domain transmission parameter used by the relay device to forward the SSB with the first index in the y+Mth period, y and M are positive integers, and M≥2.

[0013] That is, every M cycles, the spatial transmission parameters used by the relay device when forwarding the SSBs with the same index are the same.

[0014] In one possible design, the first index is the same as the index of the first SSB. For example, the SSB with the first index in the y th cycle is the first SSB, or the SSB with the first index in the y+M th cycle is the first SSB.

[0015] In one possible design, the first index is different from the index of the first SSB. That is, the SSB with the first index in the y th cycle and the SSB with the first index in the y+M th cycle are other SSBs than the first SSB among the at least one SSBs forwarded by the relay device.

[0016] In one possible design, the method further includes: the relay device sending, to the network device, first information, where the first information is used to indicate the size of M, so that the network device learns the spatial transmission parameter usage by the relay device when forwarding the SSBs, e.g., every M cycles, the spatial transmission parameters used by the relay device when forwarding the SSBs with the same index are the same.

[0017] In one possible design, the method further includes: the relay device receiving, from the network device, indication information, where the indication information contains information indicating m. The relay device determines the target spatial parameter according to the spatial transmission parameter of the SSB forwarded in the x th cycle, so that the target spatial parameter used by the relay device is aligned to the terminal, where x is an integer determined based on m.

[0018] It should be understood that the values of x and y can be the same or different.

[0019] In one possible design, x and m satisfy: x = m + k*M + N, where m, k, and N are integers.

[0020] In one possible design, the relay device determines the target spatial parameter according to the spatial transmission parameter of the SSB forwarded in the x th cycle, including: the relay device determines the target spatial parameter according to the spatial transmission parameter of any one of the SSBs forwarded in the x th cycle, where the same spatial transmission parameter is used by the relay device when forwarding all the SSBs in the x th cycle.

[0021] Since there is one SSB in the x th cycle that is received by the terminal, the spatial transmission parameter used by the relay device when forwarding the SSB in the x th cycle is aligned to the terminal. Since the same spatial transmission parameter is used by the relay device when forwarding all the SSBs in the x th cycle, the target spatial parameter determined based on the spatial transmission parameter of any one of the SSBs in the cycle can also be aligned to the terminal.

[0022] In a possible design, the SSBs in the x th cycle include at least the first SSB. That is, the relay device forwards the first SSB in the x th cycle.

[0023] In a possible design, at least one SSB in the x th cycle has the same index as the first SSB. That is, the relay device does not forward the first SSB in the x th cycle, but forwards at least one SSB having the same index as the first SSB.

[0024] In a possible design, the indication information further includes information indicating the first index. The relay device determines the target spatial domain parameter according to the spatial domain transmission parameter of the SSB forwarded in the x th cycle, including: the relay device determines the target spatial domain parameter according to the spatial domain transmission parameter of the SSB having the first index forwarded in the x th cycle.

[0025] Since the SSB having the first index in the x th cycle is the SSB received by the terminal, the spatial domain transmission parameter used by the relay device when transmitting the SSB is aligned to the terminal, and when the target spatial domain parameter is determined based on the spatial domain transmission parameter of the SSB, the target spatial domain parameter can also be aligned to the terminal.

[0026] In a possible design, the SSB having the first index in the x th cycle is the first SSB. That is, the relay device forwards the first SSB in the x th cycle.

[0027] In a possible design, the first index is the same as the index of the first SSB. That is, the relay device does not forward the first SSB in the x th cycle, but forwards at least one SSB having the same index as the first SSB.

[0028] In a possible design, the target spatial domain parameter includes at least one of the following: a target spatial domain transmission parameter, or a target spatial domain reception parameter. The target spatial domain transmission parameter is used for the relay device to forward information of the network device to the terminal after receiving the information, and the target spatial domain reception parameter is used for the relay device to receive information of the terminal before forwarding to the network device.

[0029] In a second aspect, an uplink access method is provided. The execution subject of the method can be a network device or a chip applied in the network device. Hereinafter, the execution subject is taken as an example for description. The method includes: the network device sends at least one SSB to a relay device, and the network device sends indication information to the relay device. The indication information includes information indicating m, and the indication information is used for the relay device to determine a target spatial domain parameter according to a spatial domain transmission parameter of an SSB forwarded in an x th cycle, where x is an integer determined based on m.

[0030] In a possible design, x and m satisfy: x = m + k * M + N, where m, k, and N are integers.

[0031] In a possible design, the indication information further includes information indicating the first index, and the indication information is used for the relay device to determine the target spatial domain parameter according to the spatial domain transmission parameter of the SSB forwarded in the x th period, including: the indication information is used for the relay device to determine the target spatial domain parameter according to the spatial domain transmission parameter of the SSB with the first index forwarded in the x th period.

[0032] In a possible design, the method further includes: receiving, by the network device, an uplink access signal from the relay device on a first random access channel opportunity RO, determining, by the network device, a first SSB according to the first RO, wherein the first SSB is one of the at least one SSB, and determining, by the network device, m according to the first SSB, wherein m satisfies the following formula:

[0033]

[0034] wherein mod() represents a modulus operator, SFN represents a system frame number of a system frame in which the first SSB is located, T SFN represents a system frame length, h represents half-frame indication information contained in the first SSB, a represents a coefficient, T SSB represents a period length of the SSB.

[0035] That is, the network device determines the first SSB based on the first RO in which the uplink access signal is received. It can be understood that the terminal initiates the uplink access signal on the first RO after receiving the first SSB. Therefore, the spatial domain transmission parameter of the first SSB forwarded by the relay device is aligned to the terminal, and the relay device can also determine the target spatial domain parameter aligned to the terminal based on m in the indication information determined based on the first SSB.

[0036] In a possible design, the network device determines the first SSB according to the first RO, including: determining, by the network device, the first SSB according to the first RO and a preset condition. The first SSB is one of the at least one second SSB closest in time domain to the first RO, and the second SSB is one of the at least one SSB satisfying the preset condition.

[0037] In a possible design, the preset condition includes: there is an association relationship between the index of the second SSB and the first RO, the second SSB is before the first RO, and a time interval between the second SSB and the first RO is greater than or equal to a first threshold.

[0038] In a possible design, the preset condition includes: there is an association relationship between the index of the second SSB and the first RO, the second SSB is before the first RO, and a time interval between the second SSB and the first RO is greater than the first threshold.

[0039] In one possible design, the method further includes: the network device receiving first information from the relay device, wherein the first information is used to indicate the size of M.

[0040] In one possible design, the method further includes: the network device sending location information to the terminal, wherein the location information includes at least information about the location of the relay device, and the location information is used by the terminal to determine whether it can be served by the relay device.

[0041] In one possible design, the method further includes: the network device sending threshold information to the terminal, wherein the threshold information includes a first threshold, which is used by the terminal to determine the RO for sending uplink access signals.

[0042] In one possible design, the target airspace parameters include at least one of the following: target airspace transmission parameters, or target airspace reception parameters. The target airspace transmission parameters are used by the relay device to forward information received from the network device to the terminal, while the target airspace reception parameters are used by the relay device to receive information from the terminal before forwarding it to the network device.

[0043] Thirdly, an uplink access method is provided. The execution subject of this method can be a terminal or a chip applied within the terminal. The following description uses a terminal as the execution subject. The method includes: the terminal receiving a first synchronization signal / physical broadcast channel block (SSB) from a relay device at a first moment; the terminal determining a first random access channel opportunity (RO) based on the first moment and the first SSB. The index of the first SSB is associated with the first RO; the moment corresponding to the first RO is no earlier than or later than a second moment; the second moment is after the first moment and spaced apart by a first threshold. The moment corresponding to the first RO is no later than or earlier than a third moment; the third moment is after the fourth moment corresponding to the third SSB and spaced apart by the first threshold. The index of the third SSB is the same as that of the first SSB, and the period of the third SSB is the next period after the period of the first SSB. The terminal sends an uplink access signal to the relay device on the first RO.

[0044] For the terminal, the first RO is determined based on the above method, and an uplink access signal is initiated on the first RO. In this way, for the receiving device of the uplink access signal, the spatial reception parameters used by the receiving device are aligned with the terminal as much as possible to ensure the transmission of the uplink access signal and reduce the occurrence of uplink access failures.

[0045] In one possible design, before the terminal determines the first RO based on a first moment, the method further includes: the terminal receiving location information from a network device. The location information includes at least information about the location of the relay device, and the terminal device determines whether it can be served by the relay device based on the location information.

[0046] In a possible design, the method further includes: receiving, by the terminal, threshold information from the network device, where the threshold information includes the first threshold.

[0047] In a fourth aspect, an uplink access method is provided. The execution subject of the method can be a relay device or a chip applied in the relay device. Hereinafter, the execution subject is taken as the relay device for example. The method includes: receiving, by the relay device, at least two synchronization signal / physical broadcast channel blocks (SSBs) from a network device, and periodically forwarding, by the relay device, an SSB with a first index. Wherein, a spatial domain transmission parameter used by the relay device for forwarding the SSB with the first index in the yth period is the same as a spatial domain transmission parameter used by the relay device for forwarding the SSB with the first index in the y+Mth period. Two or more SSBs of the at least two SSBs have the first index, y and M are positive integers, and M≥2.

[0048] In a possible design, the method further includes: sending, by the relay device, first information to the network device, where the first information is used to indicate the size of M.

[0049] In a fifth aspect, an uplink access method is provided. The execution subject of the method can be a relay device or a chip applied in the relay device. Hereinafter, the execution subject is taken as the relay device for example. The method includes: receiving, by the relay device, indication information from a network device, where the indication information includes information indicating m. The relay device determines a target spatial domain parameter according to a spatial domain transmission parameter used by the relay device for forwarding an SSB in the xth period, where x is an integer determined based on m.

[0050] In a possible design, the relay device determines the target spatial domain parameter according to a spatial domain transmission parameter used by the relay device for forwarding an SSB in the xth period, including: determining, by the relay device, the target spatial domain parameter according to a spatial domain transmission parameter used by the relay device for forwarding any one SSB in the xth period, where the relay device uses the same spatial domain transmission parameter for forwarding all SSBs in the xth period.

[0051] In a possible design, the indication information further includes information indicating the first index. The relay device determines the target spatial domain parameter according to a spatial domain transmission parameter used by the relay device for forwarding an SSB in the xth period, including: determining, by the relay device, the target spatial domain parameter according to a spatial domain transmission parameter used by the relay device for forwarding the SSB with the first index in the xth period.

[0052] In a possible design, x and m satisfy: x=m+k*M+N, where m, k, and N are integers.

[0053] In a possible design, the target spatial domain parameter includes at least one of: a target spatial domain transmission parameter, or a target spatial domain reception parameter. The target spatial domain transmission parameter is used for forwarding, by the relay device, information of the network device to the terminal, and the target spatial domain reception parameter is used for receiving, by the relay device, information of the terminal before forwarding to the network device.

[0054] In a sixth aspect, a communication apparatus is provided. The communication apparatus can be the relay device in the first aspect or any possible design of the first aspect, or a chip realizing the functions of the relay device. The communication apparatus includes modules, units, or means corresponding to the modules, units, or means in the method. The modules, units, or means can be implemented by hardware, software, or a combination of hardware and software.

[0055] The communication apparatus includes a processing unit, a sending unit, and a receiving unit. The processing unit is configured to control the receiving unit to receive at least one synchronization signal / physical broadcast channel block (SSB) from a network device, and control the sending unit to forward the at least one SSB. Each of the at least one SSB has an index, and the index is associated with a plurality of random access channel opportunities (ROs). The communication apparatus uses a spatial domain transmission parameter when forwarding each of the at least one SSB. The processing unit is further configured to control the receiving unit to receive an uplink access signal from a terminal using a first spatial domain reception parameter on a first RO. The first RO is one of the ROs associated with one of the indexes of the at least one SSB, and the first spatial domain reception parameter is determined according to a first spatial domain transmission parameter used by the communication apparatus when forwarding a first SSB. The first SSB is one of at least one second SSB, and the second SSB satisfies a preset condition.

[0056] In a possible design, the preset condition includes the following three conditions: the index of the second SSB is associated with the first RO, the second SSB is before the first RO, and a time interval between the second SSB and the first RO is greater than or equal to a first threshold.

[0057] In a possible design, the preset condition includes the following three conditions: the index of the second SSB is associated with the first RO, the second SSB is before the first RO, and a time interval between the second SSB and the first RO is greater than the first threshold.

[0058] In a possible design, the receiving unit is further configured to receive configuration information from the network device, where the configuration information is used to configure RO time-frequency resources, and the RO time-frequency resources include at least time-frequency resources of the first RO. The processing unit is further configured to determine the association between the index of the second SSB and the first RO according to the configuration information.

[0059] In an example, the sending unit is configured to forward the at least one SSB, including periodically forwarding a SSB with a first index. The spatial transmission parameter used by the communication apparatus when forwarding the SSB with the first index in the y th period is the same as the spatial transmission parameter used by the communication apparatus when forwarding the SSB with the first index in the (y+M) th period, where M is an integer greater than or equal to 2, and the first index is an index of two or more SSBs in the at least one SSB.

[0060] In an example, the sending unit is configured to forward the at least one SSB, including periodically forwarding the at least one SSB. The at least one SSB includes a SSB with a first index. The spatial transmission parameter used by the communication apparatus when forwarding the SSB with the first index in the y th period is the same as the spatial transmission parameter used by the communication apparatus when forwarding the SSB with the first index in the (y+M) th period, where M is an integer greater than or equal to 2, and the first index is an index of two or more SSBs in the at least one SSB.

[0061] In an example, the first index is the same as an index of the first SSB. For example, the SSB with the first index in the y th period is the first SSB, or the SSB with the first index in the (y+M) th period is the first SSB.

[0062] In an example, the first index is different from an index of the first SSB.

[0063] In an example, the sending unit is further configured to send first information to the network device, where the first information is used to indicate a size of M.

[0064] In an example, the receiving unit is further configured to receive indication information from the network device, where the indication information includes information indicating m. The processing unit is configured to determine a target spatial transmission parameter according to a spatial transmission parameter of a SSB forwarded in the x th period, where x is an integer determined based on m.

[0065] In an example, the processing unit is configured to determine the target spatial transmission parameter according to a spatial transmission parameter of a SSB forwarded in the x th period, including determining the target spatial transmission parameter according to a spatial transmission parameter of any one of the SSBs forwarded in the x th period, where the communication apparatus uses the same spatial transmission parameter when forwarding all the SSBs in the x th period.

[0066] In an example, x and m satisfy: x = m + k*M + N, where m, k, and N are integers.

[0067] In an example, the SSB in the x th period includes at least the first SSB.

[0068] In a possible design, at least one SSB in the xth cycle has the same index as the first SSB.

[0069] In a possible design, the indication information further includes information indicating the first index. The processing unit is configured to determine the target spatial domain parameter according to the spatial domain transmission parameter of the SSB forwarded in the xth cycle, including: determining the target spatial domain parameter according to the spatial domain transmission parameter of the SSB with the first index forwarded in the xth cycle.

[0070] In a possible design, the SSB with the first index in the xth cycle is the first SSB.

[0071] In a possible design, the first index is the same as the index of the first SSB.

[0072] In a possible design, the target spatial domain parameter includes at least one of the following: a target spatial domain transmission parameter, or a target spatial domain reception parameter. The target spatial domain transmission parameter is used for the communication apparatus to forward information of the network device to the terminal after receiving the information, and the target spatial domain reception parameter is used for the communication apparatus to receive information of the terminal before forwarding to the network device.

[0073] In a seventh aspect, a communication apparatus is provided. The communication apparatus can be the network device in the second aspect or any of the possible designs of the second aspect, or a chip for implementing functions of the network device. The communication apparatus includes modules, units, or means corresponding to the above-described methods, which can be implemented by hardware, software, or by executing corresponding software with hardware. The hardware or software includes one or more modules or units corresponding to the above-described functions.

[0074] The communication apparatus includes a processing unit, a sending unit, and a receiving unit. The processing unit is configured to control the sending unit to send at least one SSB to the relay device. The processing unit is further configured to control the sending unit to send indication information to the relay device, where the indication information includes information indicating m, and the indication information is used by the relay device to determine a target spatial domain parameter according to a spatial domain transmission parameter of an SSB forwarded in the xth cycle, where x is an integer determined based on m.

[0075] In a possible design, the indication information further includes information indicating the first index, and the indication information is used by the relay device to determine the target spatial domain parameter according to the spatial domain transmission parameter of the SSB forwarded in the xth cycle, including: the indication information is used by the relay device to determine the target spatial domain parameter according to the spatial domain transmission parameter of the SSB with the first index forwarded in the xth cycle.

[0076] In a possible design, x and m satisfy: x = m + k * M + N, where m, k, and N are integers.

[0077] In one possible design, the receiving unit is configured to receive, from the relay device, an uplink access signal on a first random access channel opportunity (RO). The processing unit is further configured to determine a first SSB based on the first RO, where the first SSB is one of the at least one SSB, and determine m based on the first SSB, where m satisfies the following equation:

[0078]

[0079] where mod() denotes a modulo operator, SFN denotes a system frame number of a system frame in which the first SSB is located, T SFN denotes a system frame length, h denotes half-frame indication information included in the first SSB, a denotes a coefficient, T SSB denotes a periodicity length of the SSB.

[0080] In one possible design, the processing unit, configured to determine the first SSB based on the first RO, includes determining the first SSB based on the first RO and a preset condition, where the first SSB is one of the at least one second SSB that is closest in time domain to the first RO, and the second SSB is one of the at least one SSB that satisfies the preset condition.

[0081] In one possible design, the preset condition includes that there is an association relationship between an index of the second SSB and the first RO, the second SSB is before the first RO, and a time interval between the second SSB and the first RO is greater than or equal to a first threshold.

[0082] In one possible design, the preset condition includes that there is an association relationship between an index of the second SSB and the first RO, the second SSB is before the first RO, and a time interval between the second SSB and the first RO is greater than the first threshold.

[0083] In one possible design, the receiving unit is further configured to receive, from the relay device, first information, where the first information is used to indicate a size of M.

[0084] In one possible design, the transmitting unit is further configured to transmit, to the terminal, location information, where the location information includes at least information of a location at which the relay device is located, and the location information is used by the terminal to determine whether the terminal can be served by the relay device.

[0085] In one possible design, the transmitting unit is further configured to transmit, to the terminal, threshold information, where the threshold information includes the first threshold, and the first threshold is used by the terminal to determine an RO at which the uplink access signal is transmitted.

[0086] In a possible design, the target air domain parameter comprises at least one of: a target air domain sending parameter, or a target air domain receiving parameter. The target air domain sending parameter is used for forwarding, by the relay device, information of the communication apparatus to the terminal, and the target air domain receiving parameter is used for receiving, by the relay device, information of the terminal before forwarding to the communication apparatus.

[0087] In an eighth aspect, a communication apparatus is provided. The communication apparatus can be the terminal in the third aspect or any possible implementation of the third aspect, or a chip realizing the functions of the terminal. The communication apparatus comprises modules, units, or means realizing the corresponding functions of the method, which can be implemented by hardware, software, or by hardware executing corresponding software. The hardware or software comprises one or more modules or units corresponding to the functions.

[0088] The communication apparatus comprises a processing unit, a sending unit, and a receiving unit. The receiving unit is configured to receive, at a first time, a first synchronization signal / physical broadcast channel block (SSB) from the relay device. The processing unit is configured to determine, according to the first time and the first SSB, a first random access channel opportunity (RO). An index of the first SSB is associated with the first RO, the time corresponding to the first RO is not earlier than or later than a second time, the second time is after the first time and is separated from the first time by a first threshold, the time corresponding to the first RO is not later than or earlier than a third time, the third time is after a fourth time corresponding to a third SSB, the third SSB has the same index as the first SSB, and a period in which the third SSB is located is a next period of a period in which the first SSB is located. The sending unit is configured to send, to the relay device, an uplink access signal on the first RO.

[0089] In a possible design, the receiving unit is further configured to receive, from the network device, location information. The location information comprises at least information of a location where the relay device is located. The processing unit is configured to determine, according to the location information, whether the device can be served by the relay device.

[0090] In a possible design, the receiving unit is further configured to receive, from the network device, threshold information. The threshold information comprises the first threshold.

[0091] In a ninth aspect, a communication apparatus is provided. The communication apparatus can be the relay device in the fourth aspect or any possible implementation of the fourth aspect, or a chip realizing the functions of the relay device. The communication apparatus comprises modules, units, or means realizing the corresponding functions of the method, which can be implemented by hardware, software, or by hardware executing corresponding software. The hardware or software comprises one or more modules or units corresponding to the functions.

[0092] The communication apparatus includes a processing unit, a sending unit and a receiving unit. The processing unit is configured to control the receiving unit to receive at least two synchronization signal / physical broadcast channel blocks (SSBs) from a network device, and control the sending unit to periodically forward an SSB with a first index. The spatial domain transmission parameter used by the communication apparatus when forwarding the SSB with the first index in the y th period is the same as the spatial domain transmission parameter used by the communication apparatus when forwarding the SSB with the first index in the (y+M) th period. Two or more of the at least two SSBs have the first index, y and M are positive integers, and M≥2.

[0093] In a possible design, the sending unit is further configured to send first information to the network device, where the first information is used to indicate the size of M.

[0094] In a tenth aspect, a communication apparatus is provided. The communication apparatus can be the relay device in the fifth aspect or any of the possible designs of the fifth aspect, or a chip implementing the functions of the relay device. The communication apparatus includes modules, units, or means corresponding to the modules, units, or means for implementing the functions of the method. The modules, units, or means can be implemented by hardware, software, or a combination of hardware and software.

[0095] The communication apparatus includes a processing unit and a receiving unit. The receiving unit is configured to receive indication information from a network device, where the indication information includes information indicating m. The processing unit is configured to determine a target spatial domain parameter according to a spatial domain transmission parameter used by the communication apparatus when forwarding an SSB in the x th period, where x is an integer determined based on m.

[0096] In a possible design, the processing unit is configured to determine the target spatial domain parameter according to a spatial domain transmission parameter used by the communication apparatus when forwarding an SSB in the x th period, including determining the target spatial domain parameter according to a spatial domain transmission parameter used by the communication apparatus when forwarding any one of the SSBs in the x th period, where the communication apparatus uses the same spatial domain transmission parameter when forwarding all the SSBs in the x th period.

[0097] In a possible design, the indication information further includes information indicating a first index. The processing unit is configured to determine the target spatial domain parameter according to a spatial domain transmission parameter used by the communication apparatus when forwarding an SSB in the x th period, including determining the target spatial domain parameter according to a spatial domain transmission parameter used by the communication apparatus when forwarding an SSB with the first index in the x th period.

[0098] In a possible design, x and m satisfy: x=m+k*M+N, where m, k, and N are integers.

[0099] In a possible design of the target air domain parameter, the target air domain parameter comprises at least one of: a target air domain sending parameter, or a target air domain receiving parameter. The target air domain sending parameter is used for forwarding information of the terminal by the communication apparatus after receiving the information of the terminal from the network device. The target air domain receiving parameter is used for receiving information of the terminal by the communication apparatus before forwarding the information of the terminal to the network device.

[0100] In a thirteenth aspect, a chip is provided. The chip comprises a processing circuit and an input / output interface. The input / output interface is configured to communicate with a module outside the chip. For example, the chip can be a chip for implementing the functions of the relay device in the first aspect or any possible design of the first aspect. The processing circuit is configured to run a computer program or an instruction to implement the method in the first aspect or any possible design of the first aspect. For another example, the chip can be a chip for implementing the functions of the relay device in the fourth aspect or any possible design of the fourth aspect. The processing circuit is configured to run a computer program or an instruction to implement the method in the fourth aspect or any possible design of the fourth aspect. For another example, the chip can be a chip for implementing the functions of the relay device in the fifth aspect or any possible design of the fifth aspect. The processing circuit is configured to run a computer program or an instruction to implement the method in the fifth aspect or any possible design of the fifth aspect.

[0101] In a thirteenth aspect, a chip is provided. The chip comprises a processing circuit and an input / output interface. The input / output interface is configured to communicate with a module outside the chip. For example, the chip can be a chip for implementing the functions of the relay device in the first aspect or any possible design of the first aspect. The processing circuit is configured to run a computer program or an instruction to implement the method in the first aspect or any possible design of the first aspect. For another example, the chip can be a chip for implementing the functions of the relay device in the fourth aspect or any possible design of the fourth aspect. The processing circuit is configured to run a computer program or an instruction to implement the method in the fourth aspect or any possible design of the fourth aspect. For another example, the chip can be a chip for implementing the functions of the relay device in the fifth aspect or any possible design of the fifth aspect. The processing circuit is configured to run a computer program or an instruction to implement the method in the fifth aspect or any possible design of the fifth aspect.

[0102] In a thirteenth aspect, a chip is provided. The chip comprises a processing circuit and an input / output interface. The input / output interface is configured to communicate with a module outside the chip. For example, the chip can be a chip for implementing the functions of the relay device in the first aspect or any possible design of the first aspect. The processing circuit is configured to run a computer program or an instruction to implement the method in the first aspect or any possible design of the first aspect. For another example, the chip can be a chip for implementing the functions of the relay device in the fourth aspect or any possible design of the fourth aspect. The processing circuit is configured to run a computer program or an instruction to implement the method in the fourth aspect or any possible design of the fourth aspect. For another example, the chip can be a chip for implementing the functions of the relay device in the fifth aspect or any possible design of the fifth aspect. The processing circuit is configured to run a computer program or an instruction to implement the method in the fifth aspect or any possible design of the fifth aspect.

[0103] In a fourteenth aspect, a communication apparatus is provided. The communication apparatus includes a processor and a memory. The memory is configured to store computer instructions, and the processor is configured to execute the instructions to cause the communication apparatus to perform the method performed by the network device in any of the aspects or any possible design thereof. The communication apparatus can be the network device in the second aspect or any possible design thereof, or a chip that implements the network device.

[0104] In a fifteenth aspect, a communication apparatus is provided. The communication apparatus includes a processor. The processor is coupled to a memory and configured to read and execute instructions in the memory to cause the communication apparatus to perform the method performed by the network device in any of the aspects or any possible design thereof. The communication apparatus can be the network device in the second aspect or any possible design thereof, or a chip that implements the network device.

[0105] In a sixteenth aspect, a chip is provided. The chip includes a processing circuit and an input / output interface. The input / output interface is configured to communicate with a module outside the chip. For example, the chip can be a chip that implements the network device in the second aspect or any possible design thereof. The processing circuit is configured to run a computer program or instructions to implement the method in the second aspect or any possible design thereof.

[0106] In a seventeenth aspect, a communication apparatus is provided. The communication apparatus includes a processor and a memory. The memory is configured to store computer instructions, and the processor is configured to execute the instructions to cause the communication apparatus to perform the method performed by the terminal in any of the aspects or any possible design thereof. The communication apparatus can be the terminal in the third aspect or any possible design thereof, or a chip that implements the terminal.

[0107] In an eighteenth aspect, a communication apparatus is provided. The communication apparatus includes a processor. The processor is coupled to a memory and configured to read and execute instructions in the memory to cause the communication apparatus to perform the method performed by the terminal in any of the aspects or any possible design thereof. The communication apparatus can be the terminal in the third aspect or any possible design thereof, or a chip that implements the terminal.

[0108] In a nineteenth aspect, a chip is provided. The chip includes a processing circuit and an input / output interface. The input / output interface is configured to communicate with a module outside the chip. For example, the chip can be a chip that implements the terminal in the third aspect or any possible design thereof. The processing circuit is configured to run a computer program or instructions to implement the method in the third aspect or any possible design thereof.

[0109] A twentieth aspect provides a computer-readable storage medium. The computer-readable storage medium stores instructions which, when executed on a computer, cause the computer to perform the method of any one of the above aspects.

[0110] A twenty-first aspect provides a computer program product comprising instructions which, when executed on a computer, cause the computer to perform the method of any one of the above aspects.

[0111] A twenty-second aspect provides circuitry. The circuitry comprises processing circuitry configured to perform the method of any one of the above aspects.

[0112] The technical effects brought by the sixth aspect to the twentieth aspect can refer to the beneficial effects of the corresponding method provided above, and will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0113] Figure 1 A schematic diagram of an architecture of a communication system is provided for embodiments of the present application;

[0114] Figure 2 A working principle diagram of a relay device is provided for embodiments of the present application;

[0115] Figure 3 A schematic diagram of an SSB is provided for embodiments of the present application;

[0116] Figure 4 A schematic diagram of an SSB transmission mode is provided for embodiments of the present application;

[0117] Figure 5 A schematic diagram of an association between an SSB and a random access channel occasion is provided for embodiments of the present application;

[0118] Figure 6 A schematic diagram of another SSB transmission mode is provided for embodiments of the present application;

[0119] Figure 7 A schematic diagram of an uplink access signal transmission mode is provided for embodiments of the present application;

[0120] Figure 8 A schematic diagram of another uplink access signal transmission mode is provided for embodiments of the present application;

[0121] Figure 9 A method flowchart of an uplink access method is provided for embodiments of the present application;

[0122] Figure 10a A schematic diagram of yet another SSB transmission mode is provided for embodiments of the present application;

[0123] Figure 10b A schematic diagram of another SSB transmission method provided by an embodiment of the application;

[0124] Figure 10c A schematic diagram of another SSB transmission method provided by an embodiment of the application;

[0125] Figure 10d A schematic diagram of a transmission beam of a relay device provided by an embodiment of the application;

[0126] Figure 10e A method flowchart of another uplink access method provided by an embodiment of the application;

[0127] Figure 10f A schematic diagram of another SSB transmission method provided by an embodiment of the application;

[0128] Figure 11 A method flowchart of another uplink access method provided by an embodiment of the application;

[0129] Figure 12 A schematic diagram of another uplink access signal transmission method provided by an embodiment of the application;

[0130] Figure 13a A method flowchart of another uplink access method provided by an embodiment of the application;

[0131] Figure 13b A method flowchart of another uplink access method provided by an embodiment of the application;

[0132] Figure 14a A method flowchart of another uplink access method provided by an embodiment of the application;

[0133] Figure 14b A method flowchart of another uplink access method provided by an embodiment of the application;

[0134] Figure 14c A method flowchart of another uplink access method provided by an embodiment of the application;

[0135] Figure 15 A method flowchart of another uplink access method provided by an embodiment of the application;

[0136] Figure 16 A method flowchart of another uplink access method provided by an embodiment of the application;

[0137] Figure 17 A structural schematic diagram of a communication apparatus provided by an embodiment of the application;

[0138] Figure 18Another structural diagram of a communication apparatus provided by an embodiment of the present application is shown. DETAILED DESCRIPTION

[0139] The terms "first" and "second" and the like in the description of the present application and the drawings are used to distinguish different objects, or to distinguish different processing of the same object, and are not used to describe a specific order of the objects. In addition, the terms "comprise" and "have" and any variations thereof mentioned in the description of the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but can optionally include other steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device. It should be noted that in the embodiments of the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as more preferred or advantageous than other embodiments or design solutions. Rather, the use of "exemplary" or "for example" is intended to present relevant concepts in a concrete manner. In the embodiments of the present application, "more than two" includes two by itself. A plurality can include two, three or more.

[0140] Figure 1 is a structural diagram of a communication system 1000 to which an embodiment of the present application is applied. As shown in Figure 1 , the communication system 1000 includes a terminal 11, a relay device 12, and a network device 13.

[0141] The terminal 11 includes a device that provides voice and / or data connectivity to a user, specifically, a device that provides voice connectivity, or a device that provides data connectivity, or a device that provides both voice and data connectivity. For example, the terminal 11 can include a handheld device having wireless connection capability, or a processing device connected to a wireless modem. The terminal can communicate with a core network via a radio access network (RAN), exchanging voice or data with the RAN. The terminal can include a user equipment (UE), a wireless terminal device, a mobile terminal device, a device-to-device (D2D) terminal device, a vehicle to everything (V2X) terminal device, a machine-to-machine / Machine-Type Communications (M2M / MTC) terminal device, an internet of things (IoT) terminal device, a subscriber unit, a subscriber station, a mobile station, a remote station, an access point (AP), a remote terminal, an access terminal, a user terminal, a user agent, or a user device, etc. For example, it can include a mobile telephone (also known as a "cellular" telephone), a computer with mobile termination, a portable, pocket, handheld, computer-included mobile device, etc. For example, it can include a personal communication service (PCS) telephone, a cordless telephone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), etc. It can also include a limited device, such as a low power device, or a device with limited storage, or a device with limited computing capability, etc. For example, it can include a bar code, a radio frequency identification (RFID), a sensor, a global positioning system (GPS), a laser scanner, etc. information sensing device.

[0142] The various terminals as described above can be considered as on-board terminal devices if they are located on a vehicle (e.g. placed inside or mounted inside a vehicle), for example also referred to as on-board units (OBU).

[0143] In the embodiments of the present application, the device for implementing the function of the terminal can be a terminal device or a device capable of supporting the terminal to implement the function, such as a chip system, which can be installed in the terminal. In the embodiments of the present application, the chip system can be composed of a chip or can include a chip and other discrete devices. In the technical solutions provided in the embodiments of the present application, the device for implementing the function of the terminal is taken as an example of the terminal for introduction.

[0144] The relay device 12 is one or more devices added between the terminal 11 and the network device 13, responsible for one or more times of forwarding wireless signals, that is, the wireless signals of the network device 13 can reach the terminal 11 through multiple hops, and the wireless signals of the terminal 11 can reach the network device 13 through multiple hops. Taking a simple two-hop relay as an example, the link from a network device 13 to a terminal 11 is divided into a link from the network device 13 to the relay device 12 and a link from the relay device 12 to the terminal 11. The relay device 12 can amplify the received signals, thereby replacing a link with poor quality with a link with good quality to obtain higher link capacity or better coverage. Exemplarily, the relay device 12 can be a radio frequency (RF) repeater, a network controlled repeater (NCR), or a smart repeater. The embodiments of the present application do not limit the specific technology and specific device form of the relay device.

[0145] Exemplarily, as shown in Figure 2 The relay device receives the downlink signal of the network device 13 through the donor antenna, then performs filtering, amplification and other operations, and finally transmits the amplified signal to the terminal 11 through the service antenna. This mode can be referred to as a downlink forwarding mode. In the downlink forwarding mode, the channel between the donor antenna and the service antenna can also be referred to as a downlink forwarding channel. On the other hand, the relay device can receive the uplink signal from the terminal 11 through the service antenna, then perform filtering, amplification and other operations, and finally transmit the amplified signal to the network device 13 through the donor antenna. This mode can be referred to as an uplink forwarding mode. In the uplink forwarding mode, the channel between the service antenna and the donor antenna can also be referred to as an uplink forwarding channel. Optionally, the uplink forwarding channel and the downlink forwarding channel can also include a frequency mixer. Figure 2As shown, taking the uplink forwarding channel as an example, the relay device 12 first down-converts the high-frequency signal to an intermediate frequency (or baseband) through a mixer, filters at the intermediate frequency (or baseband), and then up-converts the signal back to the high frequency through a mixer before transmitting the signal out. Optionally, the uplink forwarding channel and the downlink forwarding channel further include a power amplifier, such as a low-noise amplifier (LNA) and the like. Among them, the donor antenna can also be referred to as a forward antenna. The service antenna is also referred to as a backward antenna or a retransmission antenna.

[0146] The network device 13 can be an access point of wireless communication or wired communication, for example, a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a 5th generation (5G) mobile communication system, a next generation NodeB in a 6th generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc.; or can be a module or unit that completes part of the functions of a base station, for example, can be a central unit (CU) or a distributed unit (DU). Here, the CU completes the functions of the radio resource control protocol and the packet data convergence protocol (PDCP) of the base station, and can also complete the function of the service data adaptation protocol (SDAP); the DU completes the functions of the radio link control layer and the medium access control (MAC) layer of the base station, and can also complete part of the functions of the physical layer or all the functions of the physical layer. For specific descriptions of the above-mentioned protocol layers, reference can be made to the relevant technical specifications of the 3rd generation partnership project (3GPP). The network device can be a macro base station, or a micro base station or an indoor station, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.

[0147] In order to facilitate understanding of the embodiments of the present application, the related technologies involved in the present application are briefly introduced as follows.

[0148] 1、Beam

[0149] In a high frequency band, the path loss of a signal in space is particularly large. In order to overcome the large path loss, a transmitting device needs to use a beamforming method to transmit a signal, so as to concentrate the energy of the signal in a certain direction. A receiving device can also use a beamforming method to amplify the energy of the signal received in a certain direction. When the transmission beam direction of the transmitting device and the reception beam direction of the receiving device match the transmission path corresponding to the channel, the receiving device can receive a signal with large power / energy, or equivalently, the signal received by the receiving device has a large signal to noise ratio (SNR) or signal to interference and noise ratio (SINR).

[0150] The beam forming technology can be a beamforming technology or other technology. The beamforming technology can be a digital beamforming technology, an analog beamforming technology, or a hybrid digital / analog beamforming technology, etc.

[0151] The beam can be embodied as a spatial domain filter, or a spatial filter, or a spatial parameter, or a spatial parameter. The beam used for transmitting a signal can be referred to as a transmission beam (Tx beam), or a spatial domain transmission filter, or a spatial transmission parameter, or a spatial transmission parameter, or a spatial transmission parameter, or a spatial transmission parameter. The beam used for receiving a signal can be referred to as a reception beam (Rx beam), or a spatial domain receive filter, or a spatial RX parameter, or a spatial RX parameter. In the embodiments of the application, the spatial parameter, the spatial transmission parameter and the spatial reception parameter are taken as examples for introduction. It is uniformly stated here that the subsequent description will not be repeated.

[0152] 2, SSB

[0153] In Figure 1 In the network architecture shown, a terminal can achieve synchronization with a network device and obtain system information by receiving an SSB from the network device.

[0154] 2-1, Composition of SSB

[0155] In this embodiment of the application, the SSB may include a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH). For example... Figure 3 As shown, in the time domain, one SSB occupies four orthogonal frequency division multiplexing (OFDM) symbols, designated as symbols 0 to 3. In the frequency domain, one SSB occupies 20 resource blocks (RBs). Each RB comprises 12 subcarriers, meaning one SSB occupies 240 subcarriers, numbered 0 to 239. The PSS is located on the middle 127 subcarriers of symbol 0, and the SSS is located on the middle 127 subcarriers of symbol 2. To protect the PSS and SSS, different guard subcarriers are used. These guard subcarriers are not used to carry signals; guard subcarriers are reserved on both sides of the SSS as guard subcarriers, as shown below. Figure 3 The blank areas on both sides of the SSS are the guard subcarriers. The PBCH occupies all the subcarriers of symbols 1 and 3, and part of the subcarriers of symbol 2. The PSS and SSS can be used for terminal time-frequency synchronization, while the PBCH carries some basic configuration information of the network device (or its cell) that transmits the SSS.

[0156] 2-2. SSB Period

[0157] Network devices send SSBs periodically. An SSB period consists of one SSB burst, and the relative positions of the SSB bursts are the same within each SSB period. Therefore, an SSB period can also be understood as the period of SSB bursts. An SSB burst contains multiple SSBs. Each SSB has an index. Within an SSB period, the indices of different SSBs are different. For example... Figure 4 As shown, the period length of one SSB is denoted as T. SSB The first SSB cycle includes an SSB burst, such as... Figure 4 As shown in the thick box. An SSB burst consists of k SSBs, indices denoted as SSB1, SSB2, ..., SSBk. The parameter k is a positive integer, and k ≥ 2. The second SSB cycle also includes one SSB burst, as shown... Figure 4As shown in the middle thick box, one SSB burst includes k SSBs, and the indexes of the k SSBs are the same as the indexes of the k SSBs in the first SSB period, that is, the indexes are still SSB1, SSB2, …, SSBk. The SSBs with the same index have the same relative position in different SSB bursts. Generally, the SSB period length is a fixed value, for example, 20 ms, unless the network device changes its own sending configuration. In addition, the SSB period can also be described as the period of SSB or period. In the embodiments of the present application, for the sake of clear and simple description, the period is taken as an example for description, and it is uniformly stated here that the subsequent description will not be repeated. The SSB period configuration includes the SSB period length configuration and the SSB burst offset configuration. The SSB period configuration can be determined by the terminal through measurement, or the terminal can be informed by the network device through indication information.

[0158] For the network device, the network device uses spatial domain sending parameters to send SSBs. For different SSBs in the same period, the network device can use different spatial domain sending parameters for sending. For example, for the SSBs in the first period, the network device uses spatial domain sending parameter 1 to send SSB1, the network device uses spatial domain sending parameter 2 to send SSB2, and the network device uses spatial domain sending parameter k to send SSBk. The beam directions generated by the spatial domain sending parameter 1, the spatial domain sending parameter 2, and the spatial domain sending parameter k can be different, so that the network device covers the terminals in different beam directions. For the SSBs in the adjacent period, for example, the SSBs in the second period, the indexes are still SSB1, SSB2, …, SSBk. The network device still uses spatial domain sending parameter 1 to send SSB1, the network device still uses sending beam 2 to send SSB2, and the network device still uses sending beam k to send SSBk. That is, for the SSBs with the same index in different periods, the network device uses the same spatial domain sending parameter for sending. Therefore, it can also be understood that each SSB index corresponds to a spatial domain sending parameter. Figure 4 Figure 4

[0159] ​​For the terminal, the terminal can receive and detect these SSBs, if the reference signal receive power (RSRP) of a certain SSB is greater than the RSRP threshold, and after the terminal successfully demodulates and decodes, the terminal can first determine the index of the SSB, that is, which SSB in a period. Then, the terminal determines the configuration information of the initial control resource set and the search space according to the master information block (MIB) in the SSB, so that the terminal can perform downlink control information (DCI) detection. The DCI can be used to schedule the physical downlink shared channel (PDSCH), and the PDSCH can carry the system information block (SIB). The SIB includes configuration information for the terminal to initiate random access, which can be referred to the introduction of the random access channel (RACH) occasion (RO).

[0160] It should be noted that the index involved in the embodiments of the present application can be understood as the index of the SSB; the period involved in the embodiments of the present application can be understood as the period of the SSB.

[0161] 3. Random access

[0162] The purpose of random access is to enable the terminal to access the network and obtain uplink synchronization. The random access process can be divided into contention-based and non-contention-based. The contention-based random access process mainly includes the following processes:

[0163] Step 1, the terminal sends a random access preamble sequence at a certain time-frequency location. The random access preamble sequence is also called message 1 (message 1) or uplink access signal or random access signal. In the embodiments of the present application, the uplink access signal is taken as an example for introduction.

[0164] Step 2, after detecting the random access preamble sequence, the network device feeds back a random access response to the terminal.

[0165] Step 3: The terminal sends message 3 to the network device. Message 3 carries the terminal's identification information, such as the user equipment identifier (UE ID), cell radio network temporary identifier (C-RNTI), and a random number, which are used for conflict resolution.

[0166] Step 4: The network device sends message 4 to the terminal, indicating the terminal that won the conflict resolution.

[0167] If the process is based on a non-competitive random result, then steps 1 and 2 of the above process are included, that is, steps 3 and 4, which are excluded from conflict resolution.

[0168] 4. RO

[0169] RO refers to the time-frequency resources used to transmit uplink access signals during random access procedures, and it belongs to uplink resources.

[0170] Prior to random access, the network device notifies the terminal of configuration information related to the random access channel (RACH) in the SIB. This configuration information includes time-frequency resource information for the ROs, such as the frequency domain location information and the time domain location information of the ROs. For example, the frequency domain location information of the ROs includes the number of ROs in the same time unit, the starting frequency location of the ROs, and the frequency interval of the ROs. The time domain location information of the ROs includes the configuration period of the physical random access channel (PRACH). The PRACH configuration period is typically based on system frames (SF), indicating how many system frames a system frame containing an RO appears at a time. Additionally, the time domain location information of the ROs also includes at least one of the following:

[0171] The first item, the frame index, is used to indicate the frame index that includes the RO.

[0172] The second item is the subframe index. This indicates the subframe index that includes the RO (Representation Frame).

[0173] The third item is the slot index. This indicates the slot index that includes the RO (Return of Origin).

[0174] The fourth item is the starting symbol position. Here, the starting symbol position refers to the starting symbol position of RO in the subframe identified by the aforementioned subframe index, or the starting symbol position in the time slot identified by the aforementioned time slot index.

[0175] Based on the frequency and time domain location information of the ROs mentioned above, the time-frequency location distribution of the ROs can be obtained. However, in time division duplexing (TDD) communication systems, some ROs may not be available. Valid ROs must meet certain conditions, such as not including downlink symbols and not overlapping with symbols occupied by SSBs.

[0176] Furthermore, the correlation between the RO and SSB indices allows the network device to use the corresponding spatial reception parameters to align the receiving beam with the terminal when the terminal device initiates an uplink access signal on the RO. For example, if the network device transmits an SSB with index SSB1 in the direction of beam 1, a terminal device positioned in the direction of beam 1 can receive the SSB with index SSB1 and measure its RSRP. When the RSRP of the SSB meets certain conditions, it can initiate an uplink access signal on the RO associated with index SSB1. The network device can then use beam 1 to receive the signal on the RO associated with SSB1, thus ensuring a high power / energy of the received uplink access signal and improving the success rate of random access by the terminal.

[0177] It should be noted that the association between the indexes of RO and SSB is achieved through mapping. When an SSB index is mapped to an RO, the mapping follows the order of frequency domain first, then time domain. For example, the SSB also includes a parameter N. When N is less than 1, an index can be mapped to 1 / N (an integer) consecutive ROs. The terminal maps a given index to a valid RO according to the RO configuration information (such as the time domain location information and frequency domain location information of the RO mentioned above), following the order of frequency domain mapping followed by time domain mapping.

[0178] For example, with Figure 5 For example, the number of ROs in a time unit is 4, N = 1 / 4. For an association period (AP), the 4 ROs in the first time unit are associated with the index SSB1, and the 4 ROs in the second time unit are associated with the index SSB2. An AP includes one or more PRACH configuration periods. Within an AP, each index is associated with at least one valid RO. In different APs, the locations of valid ROs may differ, resulting in different patterns of the index-valid RO mapping relationship in different APs. An association pattern period (APP) includes one or more APs. The mapping relationship pattern between indices and valid ROs repeats according to the APP period. For example, in... Figure 5In this context, the mapping patterns of indices and ROs are different in AP1 and AP2. Therefore, one application contains two APs, namely AP1 and AP2 mentioned above. If the SSB index received by the terminal is SSB1, the terminal can determine the RO associated with this SSB1 index through this mapping relationship and send an uplink access signal on the RO associated with this SSB1 index.

[0179] It should be understood that the mapping of an SSB index to a RO can also be interpreted as a relationship between the RO and the SSB index. This relationship can be positive or negative; for example, when describing a RO, it can be described as the RO associated with a certain index. Similarly, when describing an index, it can be described as the index associated with a certain RO.

[0180] exist Figure 1 In the network architecture shown, the locations of relay devices and network devices are usually fixed. Therefore, the channels between them are relatively fixed; that is, the receive beam of the relay device receiving downlink signals from the network device and the transmit beam of the relay device forwarding uplink signals from terminals to the network device are usually fixed. However, terminals may be constantly moving, and relay devices serve different terminals. Therefore, relay devices continuously adjust the transmit beam for forwarding downlink signals to terminals and the receive beam for receiving uplink signals from terminals. For some common downlink signals, such as SSBs, relay devices need to forward them to terminals within their coverage area. To ensure the coverage performance of relay devices, one possible method is that for an SSB with a certain index, the relay device forwards it to one direction in one cycle and then forwards it to another direction in the next cycle. Assuming that the relay device has a total of M beam directions for forwarding SSBs, after M cycles, the relay device will forward SSBs with the same index to M directions. Figure 6 As shown, during downlink transmission, if the relay device is within the coverage area of ​​the transmit beam corresponding to SSB2, the relay device can forward the SSB with index SSB2 (or the SSB identified by index SSB2) sent by the network device to the terminal within the relay device's coverage area. For the SSB identified by index SSB2, in the first cycle, the relay device forwards the SSB to the beam direction identified by SSB2-1, and in the second SSB, the relay device forwards the SSB to the beam direction identified by SSB2-2. Figure 6 This example only shows the relay device forwarding SSB with index SSB2, but it can also forward SSBs with one or more other indices. For example, the relay device can also forward SSBs with index SSB1 and SSBk. The spatial transmission parameters used by the relay device when forwarding SSBs with different indices within the same period can be the same or different.

[0181] However, the random access process of the terminal is affected in the above process, as analyzed below: In a scenario without a repeater, the terminal determines the associated RO based on the received SSB index, and then selects an RO from the associated ROs to send an uplink access signal. The association between the index and the RO ensures that the network device determines the spatial reception parameters on the associated RO based on the spatial transmission parameters corresponding to the index, thus aligning the beam with the terminal. However, with the introduction of a repeater, the repeater uses different spatial transmission parameters for an SSB identified by the same SSB index in different periods. Therefore, with a repeater, the one-to-one correspondence between the SSB index and the beam no longer exists, making it impossible to guarantee that the beam used by the repeater is aligned with the terminal. Figure 7 As shown, the transmission process of SSB, i.e. Figure 7 The downlink transmission process can be found in [reference]. Figure 6 As explained, for relay equipment, the relay only forwards the radio frequency signal for the SSB; therefore, the content carried by the SSB in these two cycles is mostly the same. When the terminal is in the beam direction identified by SSB2-2, the terminal receives the SSB transmitted in that beam direction and determines its index as SSB2. Based on the SIB sent by the network device, the terminal determines the RO associated with this SSB2 index, such as... Figure 7 As shown; then, the uplink access signal is sent through a specific RO associated with the SSB2 index. The relay device needs to perform uplink forwarding on the RO associated with the SSB2 index. For the relay device, in order to serve all terminals within its coverage area, the relay device polls the receive beam on the RO associated with the SSB2 index. For example, on the second column RO of AP2, it may use the receive beam identified by SSB2-1 to receive the uplink access signal from the terminal, or it may use the receive beam identified by SSB2-2 to receive the uplink access signal from the terminal.

[0182] Suppose a terminal is located within the beam coverage area of ​​a relay device identified by SSB2-2, and also receives the SSB (indexed as SSB2) forwarded by the relay device, along with the SIB configuration information. Therefore, the terminal determines the RO corresponding to the SSB2 index. However, since the terminal is unaware of the relay device's existence, it may randomly select an RO from the ROs corresponding to the SSB2 index and send an uplink access signal, i.e., msg1. Figure 7For example, the terminal sends an uplink access signal on the second column RO of AP2. For the relay device, the receive beam identified by SSB2-1 cannot be aligned with the terminal, while the receive beam identified by SSB2-2 can be aligned with the terminal. Furthermore, it is uncertain which receive beam the relay device uses on the second column RO of AP2. Therefore, the relay device's receive beam may not be aligned with the terminal, resulting in a weak uplink access signal received by the relay device. This further weakens the uplink access signal forwarded by the relay device and causes the network device to receive a weak uplink access signal, leading to the terminal's failure to initiate uplink random access.

[0183] In addition, network devices can transmit multiple SSBs in the same beam direction within one cycle to solve the above-mentioned technical problems. This mechanism can be called the extended SSB transmission pattern mechanism, which is described in detail below:

[0184] Within one cycle, a network device transmits multiple SSBs in the direction of the relay device's beam. Correspondingly, the relay device can receive multiple SSBs from the network device in the same receiving beam direction within one cycle. These multiple SSBs have different indices, and the relay device can use different spatial transmission parameters to forward these multiple SSBs within one cycle.

[0185] by Figure 8 For example, a cycle includes four SSBs, indexed as SSB1, SSB2, SSB3, and SSB4. During downlink transmission, the network device transmits two SSBs in the same beam direction, with indices SSB1 and SSB2. The network device also transmits two more SSBs in the other beam direction, with indices SSB3 and SSB4. Assuming the relay device only forwards SSBs with indices SSB3 and SSB4 (SSBs with indices SSB1 and SSB2 are not aligned with the relay device's direction, resulting in weaker signal energy and poor forwarding even if received), the relay device can forward SSBs with indices SSB3 and SSB4 to the terminal within one cycle using beams in different directions. Furthermore, the forwarding beams (the transmission beams used to forward SSBs to the terminal) used in different cycles are the same; that is, for any SSB index, the relay device has a specific forwarding beam corresponding to it, unlike the previous method. Figure 7 In this scheme, for an index of SSB, the relay device has multiple forwarding beams corresponding to it. For example, for the index SSB2, the relay device's forwarding beams include the transmit beam identified by SSB2-1 and the transmit beam identified by SSB2-2.

[0186] For the terminal, the terminal in different beam directions of the relay device has different received SSBs, and the ROs associated with different indexes are also different. After the terminal initiates the uplink access signal on a certain RO, the receiving beam used by the relay device on the RO is uniquely determined, that is, the receiving beam is determined according to the transmitting beam corresponding to the SSB index associated with the RO. Figure 8 For example, the terminal transmits the uplink access signal on the fourth column RO of the AP1 or the fourth column RO of the AP2. Regardless of the RO position selected by the terminal, since the index of the corresponding SSB is determined, and the relay device has a determined forwarding beam corresponding to the SSB with the same index, the receiving beam of the relay device on the RO is determined according to the forwarding beam of the SSB identified by the index associated with the RO, so that the receiving beam of the relay device can also be aligned with the terminal to receive the uplink access signal, and the received uplink access signal has a higher RSRP or energy, thereby improving the success rate of the terminal initiating random access.

[0187] Although the above problem can be solved by expanding the SSB transmission pattern mechanism, the network device additionally transmits the SSB, which reduces the cell capacity and also reduces the available uplink resources. In addition, part of the terminals do not support the expanded SSB transmission pattern mechanism.

[0188] Therefore, the embodiments of the present application provide an uplink access method, which can be applied to a communication system. Figure 1 In the embodiments of the present application, the period refers to the period of the SSB. The index of the SSB is denoted as SSBi, where i is a positive integer, such as SSB1, SSB2 or SSB3. In the embodiments of the present application, in order to distinguish different SSBs, the adopted notation is the first SSB, the second SSB, the third SSB, etc. The names of messages between various network elements in the following embodiments of the present application or the names of various parameters in the messages are only examples, and other names can also be used in specific implementations. Here, it is uniformly explained, and the following will not be repeated.

[0189] Next, the uplink access method provided by the embodiments of the present application will be described in detail in combination with Figures 9 to 16 .

[0190] In the uplink access method provided in the embodiments of the present application, the relay device receives at least one SSB from the network device and forwards the at least one SSB. Each SSB of the at least one SSB has an index, each index is associated with a plurality of ROs, and the relay device uses a spatial domain transmission parameter when forwarding each SSB of the at least one SSB, that is, the relay device forwards each SSB of the at least one SSB to a beam direction, and the beam directions to which different SSBs are forwarded can be the same or different. Then, the relay device receives the uplink access signal from the terminal on the first RO using the first spatial domain reception parameter. The first RO is one of the ROs associated with the index of each SSB of the at least one SSB, the first spatial domain reception parameter is determined according to the first spatial domain transmission parameter used by the relay device to forward the first SSB, the first SSB is the one closest in time domain to the first RO among the at least one second SSB, and the second SSB is the SSB of the at least one SSB that satisfies a preset condition. In this way, the relay device determines the second SSB from the at least one SSB forwarded by the preset condition, and determines the first SSB in combination with the association relationship between each second SSB and the first RO in time domain. The first SSB can be understood as the SSB received by the terminal, and the terminal initiates the uplink access signal after receiving the first SSB. Since the first spatial domain transmission parameter corresponding to the first SSB is aligned to the terminal, the relay device determines the first spatial domain reception parameter based on the first spatial domain transmission parameter, and the relay device uses the first spatial domain reception parameter to align the receiving beam direction to the terminal, so that the relay device receives the uplink access signal of the terminal on the first RO, and reduces the phenomenon of uplink access failure. In addition, the network device, the relay device and the terminal in the embodiments of the present application do not need to expand the transmission pattern of the SSB, and have little effect on the device.

[0191] As shown in Figure 9 , the uplink access method 900 provided in the embodiments of the present application includes the following steps:

[0192] S901a, the network device sends at least one SSB.

[0193] It should be understood that the network device sends the SSB in a broadcast form. Other devices except the network device can receive the SSB. The network device can send the SSB in the form of a beam, and the specific sending manner can be referred to the above introduction about the SSB and Figure 4 .

[0194] S901b, the relay device receives at least one SSB from the network device.

[0195] The SSB in S901b can include SSBs with different indexes in the same period, or SSBs in different periods, which can be referred to Figure 4The introduction is omitted here.

[0196] S902, the relay device periodically forwards the SSB of the first index. Wherein, the spatial domain transmission parameter used by the relay device when forwarding the SSB of the first index in the yth period is the same as the spatial domain transmission parameter used by the relay device when forwarding the SSB of the first index in the y+Mth period. At least two SSBs in the at least one SSB have the first index, y and M are positive integers, and M≥2. Correspondingly, the terminal receives the SSB of the first index forwarded from the relay device.

[0197] The above process can be understood as that the relay device uses one spatial domain transmission parameter to forward the SSB of the first index in each SSB period. The spatial domain parameters used in different SSB periods can be the same or different, but the spatial domain transmission parameters corresponding to these SSBs change periodically with a period of M*T SSB , where T SSB is the period of the SSB, and M can be understood as the number of spatial domain transmission parameters used by the relay device to forward the SSB of the first index. As shown in Figure 10f , the first index is index SSB1, the relay device uses M=3 spatial domain transmission parameters to forward the SSB with index SSB1, and in the first, second and third periods, the relay device uses spatial domain transmission parameters 1-1, 1-2 and 1-3 to forward the SSB with index SSB1 respectively; when y=1, the first and fourth periods both use spatial domain transmission parameter 1-1 to forward the SSB with index SSB1. By analogy, in the fourth, fifth and sixth periods, the relay device uses spatial domain transmission parameters 1-1, 1-2 and 1-3 to forward the SSB with index SSB1 respectively... That is, the spatial domain transmission parameters corresponding to these SSBs change periodically with a period of 3*T SSB .

[0198] It should be noted that in the embodiments of the present application, the spatial domain transmission parameter used by the relay device when forwarding the SSB of the first index in the yth period can be the same as or different from the spatial domain transmission parameter used by the relay device when forwarding the SSB of the first index in the y+1th period, which is not limited in the embodiments of the present application. Referring to Figure 10a , in the case where the value of y is 1, still taking index SSB1 as an example, in the first period, the spatial domain transmission parameter used by the relay device when forwarding the SSB with index SSB1 is spatial domain transmission parameter 1-1. In the second period, the spatial domain transmission parameter used by the relay device when forwarding the SSB with index SSB1 is spatial domain transmission parameter 1-2. Wherein, spatial domain transmission parameter 1-1 is different from spatial domain transmission parameter 1-2. Therefore, the beam directions generated by spatial domain transmission parameter 1-1 and spatial domain transmission parameter 1-2 are different, as shown in Figure 10aThe thick solid ellipse is indicated by SSB1-1 and SBB1-2.

[0199] It should be understood that the value of M can be determined according to the number of beams transmitted by the relay device to complete one omnidirectional coverage. For example, the relay device transmits 3 beams to complete one omnidirectional coverage in a counterclockwise direction. In this case, the value of M is 3. For the relay device, the relay device can report the value of M to the network device. That is, as shown in FIG. 1, the relay device performs the following steps: Figure 10d Figure 10e

[0200] The relay device transmits first information to the network device. Correspondingly, the network device receives the first information from the relay device.

[0201] The first information indicates the size of M. For example, the first information can directly indicate the size of M, such as the first information including a parameter M. The first information can also indirectly indicate the size of M, such as the first information indicating the size of M through bit values. For example, there is a certain mapping relationship between the bit values and the size of M, as shown in Table 1:

[0202] Table 1

[0203] Bit values Size of M 00 3 01 6 … …

[0204] In combination with Table 1, if the bit values of the two bits are 00, it means that the first information indicates that the value of M is 3. If the bit values of the two bits are 01, it means that the first information indicates that the value of M is 6.

[0205] It should be understood that Table 1 herein only gives one mapping relationship between the bit values and the size of M, and other mapping relationships are similar, which will not be repeated here.

[0206] It should be understood that the first information can also indicate the size of M in other ways, which will not be repeated here.

[0207] It should be noted that the transmission of the first information is an optional step. If the size of M is pre-configured, the network device can also obtain the value of M. In this case, the relay device can not perform the above steps (i.e., the step of transmitting the first information). Conversely, if the size of M is not pre-configured. In this case, the relay device can perform the above steps (i.e., the step of transmitting the first information) to enable the network device to know the size of M. Alternatively, the network device can also directly indicate M, and the relay device determines the size of M according to the indication of the network device.

[0208] ​​It should be understood that in S902, only the first index is described, and in actual scenarios, the relay device can only forward the SSB of one index (i.e., the first index) or can forward the SSB of multiple indexes. When the SSB of multiple indexes is forwarded, the process of forwarding the SSB of each index can refer to the forwarding process of the SSB of the first index. In the same SSB cycle, the relay device can use the same spatial domain transmission parameter to forward the SSB of different indexes, or use different spatial domain transmission parameters to forward the SSB of different indexes.

[0209] In the following, the scenarios of forwarding SSBs of multiple indexes are introduced through the following examples 1 and 2:

[0210] Example 1: The spatial domain transmission parameters used by the relay device when forwarding SSBs of different indexes in the same cycle are the same.

[0211] Referring to Figure 10a Taking the k SSBs in the first cycle as an example, the indexes of the SSBs in the cycle include SSB1, SSB2, SSB3, …, SSBk. The relay device uses spatial domain transmission parameter 1-1 to forward the SSB identified by the index SSB1, uses spatial domain transmission parameter 2-1 to forward the SSB identified by the index SSB2, uses spatial domain transmission parameter 3-1 to forward the SSB identified by the index SSB3, …, and uses spatial domain transmission parameter k-1 to forward the SSB identified by the index SSBk. Among them, the k spatial domain transmission parameters (i.e., spatial domain transmission parameter 1-1, spatial domain transmission parameter 2-1, spatial domain transmission parameter 3-1, …, spatial domain transmission parameter k-1) in the first cycle are the same as each other, so the beam directions generated by the k spatial domain transmission parameters are the same, as shown in Figure 10a The thick solid ellipses identified by SSB1-1, SBB2-1, and SBBk-1.

[0212] Example 2: The relay device forwards SSBs of different indexes in the same cycle, and uses different spatial domain transmission parameters when forwarding SSBs of at least two indexes.

[0213] As the first case of example 2, the spatial domain transmission parameters used by the relay device when forwarding SSBs of different indexes in the same cycle are different.

[0214] Referring to Figure 10bFor example, in the first period, the indexes of the SSBs still include SSB1, SSB2, SSB3, …, SSBk. The relay device forwards the SSB identified by SSB1 using the spatial transmission parameter 1-1, forwards the SSB identified by SSB2 using the spatial transmission parameter 2-1, forwards the SSB identified by SSB3 using the spatial transmission parameter 3-1, …, and forwards the SSB identified by SSBk using the spatial transmission parameter k-1. In the first period, the k spatial transmission parameters (i.e., the spatial transmission parameter 1-1, the spatial transmission parameter 2-1, the spatial transmission parameter 3-1, …, and the spatial transmission parameter k-1) are different from each other, and therefore, the beam directions generated by the k spatial transmission parameters are different from each other, as shown in FIG. 1. Figure 10b The thick solid ellipses identified by SSB1-1, SBB2-1, and SBBk-1 are shown.

[0215] As a second case of example 2, the spatial transmission parameters used by the relay device to forward the SSBs identified by some indexes in a period are different from each other, and the spatial transmission parameters used by the relay device to forward the SSBs identified by other indexes in the period are the same.

[0216] Referring to Figure 10c For example, in the first period, the indexes of the SSBs still include SSB1, SSB2, SSB3, …, SSBk. The relay device forwards the SSB identified by SSB1 using the spatial transmission parameter 1-1, forwards the SSB identified by SSB2 using the spatial transmission parameter 2-1, forwards the SSB identified by SSB3 using the spatial transmission parameter 3-1, …, and forwards the SSB identified by SSBk using the spatial transmission parameter k-1. In the first period, at least two of the k spatial transmission parameters (i.e., the spatial transmission parameter 1-1, the spatial transmission parameter 2-1, the spatial transmission parameter 3-1, …, and the spatial transmission parameter k-1) are different from each other. For example, the spatial transmission parameter 1-1 is the same as the spatial transmission parameter 2-1, and the spatial transmission parameter 2-1 is different from the spatial transmission parameter k-1. Therefore, at least two of the beam directions generated by the k spatial transmission parameters are different from each other, as shown in FIG. 2. Figure 10c The thick solid ellipses identified by SSB1-1, SBB2-1, and SBBk-1 are shown.

[0217] It should be noted that, in the embodiments of the present application, Figure 10a , Figure 10b and Figure 10c , the notation of the spatial transmission parameter is introduced as follows: one spatial transmission parameter can be denoted as spatial transmission parameter i-tn. Wherein, i corresponds to the index of the SSB, and tn represents the tth period. For example, Figure 10aFor example, spatial domain transmission parameter 2-1 represents the spatial domain transmission parameter used by the SSB with the forwarding index SSB2 in the first period. Spatial domain transmission parameter k-1 represents the spatial domain transmission parameter used by the SSB with the forwarding index SSBk in the first period.

[0218] Similarly, in the embodiments of the present application Figure 10a , Figure 10b and Figure 10c , the notation of SSB is introduced as follows: one SSB can be denoted as SSBi-tn, which represents the SSB with the index SSBi transmitted in the tn-th period. Wherein, i represents the SSB with the index SSBi in one period, and tn represents the tn-th period. Still taking Figure 10a SSB2-1 as an example, it represents the SSB with the index SSB2 in the first period. SSBk-1 represents the SSB with the index SSBk in the first period. It should be understood that the notation of SSB introduced above is different from the index of SSB. In the notation of SSB, both the information of period and the information of index are included.

[0219] For the relay device, the relay device performs S902 to forward the SSB. As for the SSB received by the relay device in S901b, each SSB has an index, and each index is associated with an RO.

[0220] For the terminal, after receiving the SSB from the relay device, the terminal can receive and detect the SSBs, and if the RSRP of a certain SSB is greater than the RSRP threshold, initiate an uplink access signal on the RO associated with the index of the SSB. In the following, one SSB with the RSRP greater than the RSRP threshold is denoted as the first SSB, and the processing process of the terminal is described. The terminal performs S903 and S904:

[0221] S903, the terminal determines a first RO according to the first SSB.

[0222] For example, the terminal device determines one of the ROs associated with the index of the first SSB as the first RO according to the index of the first SSB. That is, the index of the first SSB is associated with the first RO, for example, the index of the first SSB can be the first index in S902.

[0223] For example, as shown in Figure 11 S903 includes S903a:

[0224] S903a, the terminal determines a first RO according to the first time and the first SSB.

[0225] Wherein, the first RO satisfies the first preset condition, the second preset condition, the third preset condition or the fourth preset condition. The four preset conditions are introduced as follows:

[0226] The first preset condition includes the following two items (i.e., both items need to be met to meet the first preset condition):

[0227] The preset condition a1 is that the time corresponding to the first RO is not earlier than a second time. The second time is after the first time and is separated from the first time by a first threshold. For example, as shown in FIG. 1A, the first SSB is the SSB1 identified by the index in the first period. The first time can be the end time or the start time of the resource occupied by the SSB1 identified by the index in the time domain in the first period, as shown in FIG. 1B. Figure 12 Figure 12 The time corresponding to the first RO can be understood as all the times corresponding to the first RO. That is, the start time or the end time of the resource occupied by the first RO in the time domain is not earlier than the second time, as shown in FIG. 1C. Figure 12

[0228] The preset condition a2 is that the time corresponding to the first RO is not later than a third time. The third time is after the fourth time corresponding to a third SSB and is separated from the fourth time by the first threshold. The third SSB has the same index as the first SSB, and the period in which the third SSB is located is the next period of the period in which the first SSB is located. For example, as shown in FIG. 1A, the third SSB is the SSB1 identified by the index in the second period. The fourth time can be the start time or the end time of the resource occupied by the SSB1 identified by the index in the time domain in the second period. That is, the start time or the end time of the resource occupied by the first RO in the time domain is not later than the third time, as shown in FIG. 1D. Figure 12 Figure 12

[0229] That is, the first RO is an RO between the second time (including the second time itself) and the third time (including the third time itself). For example, as shown in FIG. 1A, the ROs that meet the preset condition A include RO1, RO2, and RO3; therefore, the first RO can be one of the RO1, RO2, and RO3. Figure 12

[0230] The second preset condition includes the following two items (i.e., both items need to be met to meet the second preset condition):

[0231] The preset condition b1 is that the time corresponding to the first RO is later than the second time. The time corresponding to the first RO and the second time can be referred to the preset condition a1, which will not be described herein again. That is, the start time or the end time of the resource occupied by the first RO in the time domain is later than the second time.

[0232] ​​​​​The preset condition b2 is that the time corresponding to the first RO is not later than a third time. The third time can be referred to the preset condition a2, which will not be repeated here. That is, the starting time or the ending time of the resource occupied by the first RO in the time domain is not later than the third time.

[0233] That is, the first RO is the RO between the second time (not including the second time itself) and the third time (including the third time itself).

[0234] The third preset condition includes the following two items (both of which need to be met to meet the third preset condition):

[0235] The preset condition c1 is that the time corresponding to the first RO is later than the second time. The time corresponding to the first RO and the second time can be referred to the preset condition a1, which will not be repeated here. That is, the starting time or the ending time of the resource occupied by the first RO in the time domain is later than the second time.

[0236] The preset condition c2 is that the time corresponding to the first RO is earlier than the third time. The third time can be referred to the preset condition a2, which will not be repeated here. That is, the starting time or the ending time of the resource occupied by the first RO in the time domain is earlier than the third time.

[0237] That is, the first RO is the RO between the second time (not including the second time itself) and the third time (not including the third time itself).

[0238] The fourth preset condition includes the following two items (both of which need to be met to meet the fourth preset condition):

[0239] The preset condition d1 is that the time corresponding to the first RO is not earlier than the second time. The time corresponding to the first RO and the second time can be referred to the preset condition a1, which will not be repeated here. That is, the starting time or the ending time of the resource occupied by the first RO in the time domain is not earlier than the second time.

[0240] The preset condition d2 is that the time corresponding to the first RO is earlier than the third time. The third time can be referred to the preset condition a2, which will not be repeated here. That is, the starting time or the ending time of the resource occupied by the first RO in the time domain is earlier than the third time.

[0241] That is, the first RO is the RO between the second time (including the second time itself) and the third time (not including the third time itself).

[0242] It should be understood that in the embodiments of the present application, the system frame carrying the SSB can also represent time, and the time-frequency resource corresponding to the RO can also represent time. Therefore, the above-mentioned preset conditions exist equivalent replacement descriptions.

[0243] The description of the first preset condition can be replaced by a fifth preset condition. The fifth preset condition includes the following two items (that is, both items need to be met to meet the fifth preset condition):

[0244] The preset condition e1 is that the first RO is not earlier than a second time. The second time is after the first SSB and is separated from the first SSB by a first threshold.

[0245] The preset condition e2 is that the first RO is not later than a third time. The third time is after the third SSB and is separated from the third SSB by a first threshold. The second SSB has the same index as the first SSB, and the period in which the second SSB is located is the next period of the period in which the first SSB is located.

[0246] The description of the second preset condition can be replaced by a sixth preset condition. The sixth preset condition includes the following two items (that is, both items need to be met to meet the sixth preset condition):

[0247] The preset condition f1 is that the first RO is later than the second time. The second time can be referred to as the preset condition e1, which will not be described here.

[0248] The preset condition f2 is that the first RO is not later than the third time. The third time can be referred to as the preset condition e2, which will not be described here.

[0249] The description of the third preset condition can be replaced by a seventh preset condition. The seventh preset condition includes the following two items (that is, both items need to be met to meet the seventh preset condition):

[0250] The preset condition g1 is that the first RO is later than the second time. The second time can be referred to as the preset condition e1, which will not be described here.

[0251] The preset condition g2 is that the first RO is earlier than the third time. The third time can be referred to as the preset condition e2, which will not be described here.

[0252] The description of the fourth preset condition can be replaced by an eighth preset condition. The eighth preset condition includes the following two items (that is, both items need to be met to meet the eighth preset condition):

[0253] The preset condition h1 is that the first RO is not earlier than the second time. The second time can be referred to as the preset condition e1, which will not be described here.

[0254] The preset condition h2 is that the first RO is earlier than the third time. The third time can be referred to as the preset condition e2, which will not be described here.

[0255] It should be noted that in the embodiments of the present application, the first threshold is introduced as follows: for the terminal, after the terminal detects an SSB, the terminal processes the SSB. If the RSRP of the SSB is greater than a certain threshold, the terminal selects an RO in the index associated RO of the SSB and initiates an uplink access signal. The first threshold can be understood as the length of time for the terminal device to process the SSB and select the RO. The first threshold can be preconfigured information or information sent by the network device to the terminal, such as Figure 15 , as shown in Figure 15 , the network device further performs S930:

[0256] S930, the network device sends threshold information to the terminal. Correspondingly, the terminal receives the threshold information from the network device.

[0257] Among them, the threshold information includes the first threshold. It should be noted that S903 is an optional step. When the terminal does not know the existence of the relay device, the terminal can determine the RO according to the original way (i.e. the way introduced in Figure 7 ). At this time, the performance of this scheme will be worse than that of forcing the terminal to perform S903, but it can still solve the problem to some extent.

[0258] For the terminal, after determining the first RO, S904 is performed:

[0259] S904, the terminal sends an uplink access signal to the relay device on the first RO. Correspondingly, the relay device receives the uplink access signal from the terminal on the first RO using the first spatial domain receiving parameter.

[0260] Exemplarily, taking RO1 in Figure 12 as the first RO, the terminal sends an uplink access signal to the relay device on RO1. Correspondingly, the relay device receives the uplink access signal from the terminal on RO1 using the first spatial domain receiving parameter.

[0261] Among them, the first spatial domain receiving parameter can be aligned with the terminal, for details, see the introduction of S906 to S907, which will not be repeated here.

[0262] For the relay device, after receiving the uplink access signal, S905 is performed:

[0263] S905, the relay device forwards the uplink access signal to the network device. Correspondingly, the network device receives the uplink access signal from the relay device.

[0264] Exemplarily, still taking Figure 12For example, the relay device forwards the uplink access signal to the network device on the first RO. Correspondingly, the network device receives the uplink access signal from the relay device on the first RO, and then performs the random access process, which will be described in the explanation of terms, and will not be described here.

[0265] It should be noted that for the relay device, the relay device can also report to the network device which time-frequency resources it is in the uplink forwarding mode, to assist the network device to determine whether the information it receives is forwarded by the relay device or directly from the terminal. For example, the relay device sends information X to the network device. Correspondingly, the network device receives information X from the relay device. Wherein, the information X includes the index of the SSB, that is, the relay device will forward the SSB corresponding to the SSB index. For the network device, the network device determines the RO associated with the index in the information X, and then determines that the relay device is in the uplink forwarding mode on the RO (the RO associated with the index in the information X). If the network device receives information on the RO (the RO associated with the index in the information X), the network device can consider that the information may be forwarded by the relay device. It should be understood that for the relay device, after receiving the SSB from the network device, the relay device measures the SSB to obtain the measurement result. The relay device determines which index the information X carries according to the measurement result of the SSB.

[0266] Alternatively, the network device can directly send information X to the relay device, wherein the information X includes the index of the SSB to indicate that the relay device is in the uplink forwarding mode on the RO (the RO associated with the index in the information X), or the information X indicates which RO the relay device is in the uplink forwarding mode. For the relay device, the first spatial domain receiving parameter used by the relay device in S904 is aligned to the terminal. Wherein, the determination process of the first spatial domain receiving parameter is as shown in Figure 13a The relay device performs S906 and S907:

[0267] S906, the relay device determines the first SSB according to the first RO.

[0268] Wherein, the first RO in S906 is consistent with the first RO in S905, which will not be described here.

[0269] Wherein, the first SSB is one of the at least one second SSB, such as the first SSB is the one of the at least one second SSB closest to the first RO in the time domain, and the second SSB is the SSB satisfying the ninth preset condition or the tenth preset condition in the at least one SSB forwarded by the relay device.

[0270] For example, the ninth preset condition includes the following three items (that is, all three items must be met to meet the ninth preset condition):

[0271] Preset condition i1: The index of the second SSB is associated with the first RO.

[0272] Preset condition i2: the second SSB precedes the first RO. That is, the relay device forwards the second SSB first, and then receives the uplink access signal through the first RO.

[0273] Preset condition i3: The time interval between the second SSB and the first RO is greater than or equal to a first threshold. The first threshold can be found in the description of S904a and will not be repeated here. It should be understood that the description of preset condition i3 can also be replaced with: The time interval between the time corresponding to the second SSB and the time corresponding to the first RO is greater than or equal to the first threshold.

[0274] like Figure 12 As shown, assuming the first RO is RO3, then based on the above conditions, the first SSB can be determined to be SSB1. Assuming the first RO is RO4, then based on the above conditions, the first SSB can be determined to be SSB2.

[0275] For example, the tenth preset condition includes the following three items (i.e., all three items must be met to satisfy the tenth preset condition):

[0276] Preset condition j1: The index of the second SSB is associated with the first RO.

[0277] Preset condition j2, the second SSB is before the first RO, please refer to the introduction of preset condition i2, which will not be repeated here.

[0278] Preset condition j3: The time interval between the second SSB and the first RO is greater than a first threshold. The first threshold can be found in the description of S904a and will not be repeated here. It should be understood that the description of preset condition j3 can also be replaced with: The time interval between the time corresponding to the second SSB and the time corresponding to the first RO is greater than the first threshold.

[0279] The above process can be understood as follows: if there is signal transmission on the first RO, such as if the terminal initiates an uplink access signal on the first RO, then the terminal determines the first RO based on the first SSB after receiving the first SSB, and then initiates an uplink access signal on the first RO.

[0280] S907, the relay device determines the first spatial domain receiving parameters on the first RO based on the first spatial domain transmission parameters of the first SSB.

[0281] Wherein, the first spatial domain receiving parameter corresponding to the beamforming vector is same as the first spatial domain sending parameter corresponding to the beamforming vector, or the first spatial domain receiving parameter corresponding to the beam energy strongest direction is same as the first spatial domain sending parameter corresponding to the beam energy strongest direction.

[0282] Through the above method, if the terminal can receive the first SSB, it means that the first spatial domain sending parameter used by the relay device can be aligned with the terminal. Since the first spatial domain receiving parameter is determined based on the first spatial domain sending parameter, when the relay device uses the first spatial domain receiving parameter on the first RO, the first spatial domain receiving parameter can also be aligned with the terminal to receive the uplink access signal of the terminal.

[0283] It should be understood that in S906 and S907, the first spatial domain receiving parameter on the first RO is taken as an example for introduction. For the relay device, the RO associated with the index of the SSB forwarded by the relay device is multiple. Since the relay device does not know which RO the terminal will send the uplink access signal on, a spatial domain receiving parameter needs to be determined for each RO, and the signal from the terminal is received on the RO using the spatial domain receiving parameter corresponding to the RO. In addition to the first RO, the relay device repeats the processing process of S906 and S907 described above to determine the spatial domain receiving parameter used by itself on other ROs, which will not be described here.

[0284] In some embodiments, the relay device also determines the RO associated with the index of the SSB. As shown in Figure 13b The relay device performs S908 and S909:

[0285] S908, the network device sends configuration information to the relay device. Correspondingly, the relay device receives the configuration information from the network device.

[0286] Wherein, the configuration information is used to configure the RO time-frequency resource. Illustratively, the configuration information includes the time domain location information of the RO in the SIB, the frequency domain location information of the RO, which can be referred to the introduction of the RO in the term explanation part, and will not be described here. The configuration information can also be information sent by the network device to the relay device through other messages, which is not limited in the embodiments of the present application.

[0287] It should be noted that in the embodiments of the present application, the relay device can first perform S901b, and then perform S908, or first perform S908, and then perform S901b, or simultaneously perform S901b and S908, which is not limited in the embodiments of the present application.

[0288] For the relay device, after receiving the configuration information, the relay device performs S909:

[0289] S909, the relay device determines, according to the configuration information, the RO associated with the index of the SSB.

[0290] For example, each SSB forwarded by the relay device has an index. The indexes of different SSBs can be the same or different. Therefore, the number of indexes for the SSBs forwarded by the relay device can be one or more. For each index, the relay device determines the valid RO corresponding to each index according to the configuration information in the order of first frequency domain mapping and then time domain mapping. Taking two indexes as an example, the two indexes are denoted as SSB1 and SSB2 respectively. The relay device determines the valid RO corresponding to the two indexes according to the configuration information. As shown in the figure, in terms of time domain, the RO associated with the index of SSB1 is located on the first column of time units of AP1 and AP2, and the RO associated with the index of SSB2 is located on the second column of time units of AP1 and AP2. In terms of frequency domain, the RO associated with the index of SSB1 and the RO associated with the index of SSB2 correspond to the same frequency. Figure 5

[0291] In this way, the relay device can determine on which time-frequency resources to receive the uplink access signal.

[0292] It should be noted that for the relay device, the relay device first performs S908 and S909, and then performs S906 and S907 for each RO in S909. That is, the RO determined in S909 at least includes the first RO associated with the index of the second SSB.

[0293] In some embodiments, the network device can also send indication information to the relay device to enable the relay device to determine the target spatial domain parameter. The target spatial domain parameter is a spatial domain parameter to be used by the relay device, for example, the relay device uses the target spatial domain parameter to communicate with the terminal after receiving the indication information. For example, the target spatial domain parameter includes at least one of the following: a target spatial domain transmission parameter or a target spatial domain reception parameter. The target spatial domain transmission parameter is used by the relay device to forward information to the terminal after receiving the information from the network device, and the target spatial domain reception parameter is used by the relay device to receive information from the terminal before forwarding the information to the network device. For example, when the network device wants to send a response message (msg2) of the uplink access signal to the terminal, the network device can send indication information to the relay device to enable the relay device to determine the target spatial domain transmission parameter based on the indication information, and the target spatial domain transmission parameter is used by the relay device when forwarding msg2 to the terminal.

[0294] For the network device, as shown in the figure, the network device performs S920: Figure 14a

[0295] S920, the network device determines the indication information. ​​

[0296] The indication information is used to indicate the target spatial domain parameter to the relay device. For the network device, the network device receives the uplink access signal from the terminal on the first RO, which means that the relay device can align the terminal after using the first spatial domain receiving parameter on the first RO. According to the related description in S906 and S907, the relay device is determined according to the first spatial domain transmitting parameter used by the first SSB, so the network device can indicate the target spatial domain parameter to the relay device after determining the first SSB, so that the transmitting beam or receiving beam of the relay device aligns the terminal device.

[0297] As shown in Figure 14b S920 includes steps a1 and a2:

[0298] Step a1, the network device determines the first SSB according to the first RO.

[0299] The first SSB is one of the at least one second SSB, such as the first SSB is the one closest to the first RO in the time domain among the at least one second SSB, and the second SSB is an SSB that meets the ninth preset condition or the tenth preset condition among the at least one SSB forwarded by the relay device.

[0300] For example, the implementation process of step a1 can refer to S906, which will not be repeated here.

[0301] It can be understood that the method in step a1 is consistent with the method of the relay device determining the first SSB according to the first RO in step S907.

[0302] Step a2, the network device determines the indication information according to the first SSB.

[0303] The indication information includes information indicating m. m satisfies the following formula:

[0304]

[0305] Wherein, mod() represents the modulus operator, SFN represents the system frame number of the system frame where the first SSB is located, T SFN represents the system frame length, h represents the half frame indication information contained in the first SSB, a represents the coefficient, T SSB represents the period length of the SSB.

[0306] It should be understood that the value of the coefficient a is 0.5 in the case of a system frame being divided into a previous half frame and a subsequent half frame. The half frame indication information can be a half frame identifier (half_frame). For example, the value of the half frame identifier is 1 to indicate that the first SSB is in the previous half frame of a system frame, and vice versa, the value of the half frame identifier is 0 to indicate that the first SSB is in the subsequent half frame of a system frame. Alternatively, the value of the half frame identifier is 1 to indicate that the first SSB is in the subsequent half frame of a system frame, and vice versa, the value of the half frame identifier is 0 to indicate that the first SSB is in the previous half frame of a system frame.

[0307] The value of the coefficient a in formula (1) is 0.5 in the case of a system frame being divided into a previous half frame and a subsequent half frame. The period index in which the first SSB is located can be represented (the index of the first period from the start time of system frame 0 can be denoted as period index 0, the index of the second period can be denoted as period index 1, and so on). Since the relay device uses the same spatial transmission parameter in the yth period and the y+Mth period when forwarding the SSB of the same index, the spatial transmission parameter used by the relay device in the mth SSB period to forward the SSB of the same index as the first SSB is the same as the spatial transmission parameter used by the relay device to forward the first SSB.

[0308] Next, the indication information is further introduced through Examples 1 and 2:

[0309] Example 1: The scenario is that the spatial transmission parameters used by the relay device to forward different index SSBs in the same period are the same, as described in detail in the introduction of Figure 10a or Figure 10f In this example, the indication information includes indication information 1 (i.e., information indicating m) only. When the relay device only forwards an SSB of one index in the same period, it can be considered as a special case of Example 1. The following will not be described again.

[0310] Example 2: The scenario is that the relay device forwards SSBs in the same period, and the spatial transmission parameters used by the relay device to forward at least two index SSBs in the same period are different, as described in detail in the introduction of Figure 10b or Figure 10c In this example, the indication information includes indication information 2, i.e., indication information of m and indication information of the index of the first SSB (i.e., the first index).

[0311] S921, the network device sends indication information to the relay device. Correspondingly, the relay device receives the indication information from the network device.

[0312] The indication information in S921 is consistent with the indication information in S920, which will not be described again.

[0313] For the relay device, after receiving the indication information, the relay device performs S922:

[0314] S922, the relay device determines the target spatial domain parameter according to the indication information.

[0315] The indication information in S922 is consistent with the indication information in S921, which will not be repeated here.

[0316] For example, the relay device takes the spatial domain parameter indicated by the indication information as the target spatial domain parameter, or the relay device processes the spatial domain parameter indicated by the indication information, and the processed parameter is taken as the target spatial domain parameter.

[0317] The relay device determines the target spatial domain parameter according to the spatial domain transmission parameter used by the relay device to forward the SSB in the xth period, and x and m satisfy formula (2).

[0318] x = m + k * M + N formula (2)

[0319] Wherein, k can be equal to 0, 1, 2, …, M represents the number of periods in which the relay device uses the same spatial domain transmission parameter to forward the SSB index interval of the same index or the number of spatial domain transmission parameters used by the relay device to forward the SSB, and N represents the offset. It can be agreed in advance that N and M are integers. Because the relay device uses the same spatial domain transmission parameter in the yth period and the y+Mth period when forwarding the SSB of the same SSB index, the spatial domain transmission parameters in the different xth periods corresponding to different values of k are still the same for the same SSB index.

[0320] In particular, when k and N are both equal to 0, the relay device determines the target spatial domain parameter according to the spatial domain transmission parameter used by the relay device to forward the SSB in the mth period.

[0321] It should be noted that in the embodiments of the present application, the parameters k and N can also have other values, which will not be repeated here. The value of M can be a preconfigured parameter or a value reported by the relay device. For details, see Figure 10e the introduction of the first information, which will not be repeated here.

[0322] Next, the determination of the target spatial domain parameter will be further introduced through example 1 and example 2:

[0323] Example 1, the scenario is: the spatial domain transmission parameters used by the relay device to forward different index SSBs in the same period are the same, for details, see Figure 10a the introduction.

[0324] In example 1, the indication information is denoted as indication information 1, and the indication information 1 includes information indicating m. In this case, as shown in Figure 14b S922 includes S922a:

[0325] S922a, the relay device determines the target spatial domain parameter according to the indication information 1.

[0326] For example, first, the relay device determines the index of the xthperiod according to the parameter m of the indication information 1 and the above formula (2).

[0327] Then, the relay device determines the target spatial domain parameter according to the spatial domain parameter of any one SSB in the xthperiod. For example, in the case where the target spatial domain parameter is a target spatial domain transmission parameter, the target spatial domain transmission parameter is determined according to the spatial domain transmission parameter of any one SSB in the xthperiod, for example, the beamforming vector corresponding to the spatial domain transmission parameter of any one SSB in the xthperiod is the same as the beamforming vector corresponding to the target spatial domain transmission parameter, or the direction of the strongest beam energy corresponding to the spatial domain transmission parameter of any one SSB in the xthperiod is the same as the direction of the strongest beam energy corresponding to the target spatial domain transmission parameter. In the case where the target spatial domain parameter is a target spatial domain reception parameter, the target spatial domain reception parameter is determined according to the spatial domain transmission parameter of any one SSB in the xthperiod, for example, the beamforming vector corresponding to the spatial domain transmission parameter of any one SSB in the xthperiod is the same as the beamforming vector corresponding to the target spatial domain reception parameter, or the direction of the strongest beam energy corresponding to the spatial domain transmission parameter of any one SSB in the xthperiod is the same as the direction of the strongest beam energy corresponding to the target spatial domain reception parameter.

[0328] In this way, the relay device can determine the target spatial domain parameter according to the indication information 1, so that the target spatial domain parameter used by the relay device can be aligned with the terminal.

[0329] Example 2 is directed to a scenario where the relay device forwards SSBs in the same period, and the spatial domain transmission parameters used when at least two SSBs with different indexes in the same period are forwarded are different, which will be described in detail in the introduction of Figure 10b or Figure 10c .

[0330] In example 2, the indication information is denoted as indication information 2, and the indication information 2 includes information indicating m and information indicating the first index. Wherein, m is used to determine the index of the xthperiod, which can be referred to the introduction of formula (2), and the first index SSB can be the first SSB in S903a. In this case, as shown in Figure 14c S922 includes S922b:

[0331] S922b, the relay device determines the target spatial domain parameter according to the indication information 2.

[0332] For example, first, the relay device determines the index of the xthperiod according to the parameter m of the indication information 2 and the above formula (2).

[0333] Then, the relay device determines the target spatial parameter according to the spatial parameter of the SSB indexed as the first index in the xth cycle. For example, in the case that the target spatial parameter is a target spatial transmission parameter, the target spatial transmission parameter is determined according to the spatial transmission parameter of the SSB indexed as the first index in the xth cycle. In the case that the target spatial parameter is a target spatial reception parameter, the target spatial reception parameter is determined according to the spatial transmission parameter of the SSB indexed as the first index in the xth cycle.

[0334] In this way, the relay device can determine the target spatial parameter according to the indication information 2, so that the target spatial parameter used by the relay device can be aligned with the terminal.

[0335] For the relay device, after the relay device determines the target spatial parameter, the relay device performs S923a and / or S923b.

[0336] The introduction of S923a and S923b is as follows:

[0337] S923a, the relay device forwards information A sent by the network device to the terminal using the target spatial transmission parameter. Correspondingly, the terminal receives the information A.

[0338] For example, the information A is a random access response.

[0339] S923b, the relay device forwards information B sent by the terminal device to the network device using the target spatial reception parameter.

[0340] For example, the information B is the identification information of the terminal.

[0341] That is, the relay device can determine the target spatial parameter based on the indication information, and the target spatial parameter can be aligned with the terminal, helping the terminal and the network device to better transmit information.

[0342] In some embodiments, as Figure 16 shown, the network device further performs S940:

[0343] S940, the network device sends location information to the terminal. Correspondingly, the terminal receives the location information from the network device.

[0344] The location information at least includes information of the location where the relay device is located. For example, the location information includes geographical location information of the relay device.

[0345] It should be understood that the location information in S940 can be transmitted from the network device to the terminal through the relay device, or can be directly transmitted from the network device to the terminal.

[0346] It should be noted that for the network device, the network device can first perform S940, and then perform S905.

[0347] For the terminal, after receiving the location information, the terminal performs S941:

[0348] S941, the terminal determines whether the terminal can be served by the relay device according to the location information.

[0349] For example, for the terminal, the terminal can know the location where the terminal is located. If the terminal is within the range of the area indicated by the location information, the terminal determines that the terminal can be served by the relay device, and then performs S902. Otherwise, if the terminal is outside the range of the area indicated by the location information, the terminal determines that the terminal cannot be served by the relay device.

[0350] It should be understood that the description of S941 can also be replaced by the terminal determining whether the terminal is served by the relay device according to the location information.

[0351] It should be noted that S940 and S941 are optional steps. In the case where the network device has learned the locations of the relay devices, the terminal performs S940 and S941 to determine whether the terminal can be served by the relay device. Alternatively, as another possible implementation, the terminal can also measure the RSRP of a plurality of fourth SSBs, and determine whether the terminal is served by the relay device according to the RSRP measurement results of the fourth SSBs. The fourth SSBs have the same index as the second SSBs, and the second SSBs can be referred to the introduction of S903a, which will not be described here. For example, if the RSRP variance of a preset number of fourth SSBs is greater than a preset value 1, the terminal determines that the terminal is served by the relay device, or if the RSRP peak value of a preset number of fourth SSBs is greater than a preset value 2, the terminal determines that the terminal is served by the relay device. For another example, for the period in which the fourth SSBs are located, the RSRP intensity change of the fourth SSBs in every two adjacent periods is greater than a preset value 3, and the terminal determines that the terminal is served by the relay device. For another example, the non-zero frequency components of the fast Fourier transform (FFT) sequence of the RSRP of a preset number of fourth SSBs after normalization are greater than a preset value 4, and the terminal determines that the terminal is served by the relay device. Alternatively, as another possible implementation, in the case where the terminal has established a connection with the network device, the network device directly sends indication information to the terminal to indicate whether the terminal is served by the relay device.

[0352] It should be understood that when the terminal determines that the terminal is served by the relay device, the first RO is determined according to the above S903, otherwise, the terminal determines the RO in the manner of Figure 7

[0353] ​It should be noted that in the embodiments of the present application, if the Xth preset condition has two of the above conditions, if a target object meets the first preset condition, it means that the target object meets all the preset conditions of the first preset condition. For example, in the embodiments of the present application, the first RO meets the first preset condition, which means that the first RO meets any one of the preset conditions in the first preset condition, i.e., the first RO meets the preset condition a1 and the preset condition a2. The first RO meets the second preset condition, which means that the first RO meets any one of the preset conditions in the second preset condition, i.e., the first RO meets the preset condition b1 and the preset condition b2. The first RO meets the third preset condition, which means that the first RO meets any one of the preset conditions in the third preset condition, i.e., the first RO meets the preset condition c1 and the preset condition c2. The first RO meets the fourth preset condition, which means that the first RO meets any one of the preset conditions in the fourth preset condition, i.e., the first RO meets the preset condition d1 and the preset condition d2. The third SSB is an SSB that meets the ninth preset condition, which means that the third SSB meets any one of the preset conditions in the ninth preset condition, i.e., the third SSB meets the preset condition i1, the preset condition i2 and the preset condition i3. The third SSB is an SSB that meets the tenth preset condition, which means that the third SSB meets any one of the preset conditions in the tenth preset condition, i.e., the third SSB meets the preset condition j1, the preset condition j2 and the preset condition j3.

[0354] The above mainly introduces the scheme provided by the embodiments of the present application from the perspective of interaction between network elements. Correspondingly, the present application also provides a communication device, which can be a network element in the above method embodiments, or a device containing the above network element, or a component that can be used for the network element. It can be understood that the communication device contains the corresponding hardware structure and / or software module for executing each function in order to realize the above functions. Those skilled in the art should easily realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed in the present application can be realized in the form of hardware or a combination of hardware and computer software. Whether a certain function is realized in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0355] An exemplary, Figure 17 A structure diagram of a communication device 1700 is shown. The communication device 1700 includes a processing unit 1701, a sending unit 1702 and a receiving unit 1703.

[0356] In one possible example, taking the communication device 1700 as a terminal for example, the processing unit 1701 is configured to support the terminal to perform the above-mentioned method embodiments. Figure 9S903, and / or other processing operations required by the terminal in embodiments of the present application. The sending unit 1702 is configured to support the terminal to perform the sending operation S904 in the method 900, and / or other sending operations required by the terminal in embodiments of the present application. The receiving unit 1703 is configured to support the terminal to perform the receiving operation S902 in the method 900, and / or other receiving operations required by the terminal in embodiments of the present application. Figure 9 Figure 9

[0357] In another possible example, taking the communication apparatus 1700 as a relay device for example, the processing unit 1701 is configured to support other processing operations required by the relay device in embodiments of the present application. The sending unit 1702 is configured to support the relay device to perform the sending operation S905 in the method 900, and / or other sending operations required by the relay device in embodiments of the present application. The receiving unit 1703 is configured to support the relay device to perform the receiving operation S901b in the method 900, and / or other receiving operations required by the relay device in embodiments of the present application. Figure 9 Figure 9

[0358] In yet another possible example, taking the communication apparatus 1700 as a network device for example, the processing unit 1701 is configured to support other processing operations required by the network device in embodiments of the present application. The sending unit 1702 is configured to support the network device to perform the sending operation S901a in the method 900, and / or other sending operations required by the network device in embodiments of the present application. The receiving unit 1703 is configured to support the network device to perform the receiving operation S905 in the method 900, and / or other receiving operations required by the network device in embodiments of the present application. Figure 9 Figure 9

[0359] Optionally, the communication apparatus 1700 can further include a storage unit 1704, configured to store program codes and data of the communication apparatus, and the data can include, but is not limited to, original data or intermediate data, etc.

[0360] The processing unit 1701 can be a processor or a controller, for example, can be a CPU, a general-purpose processor, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. The processing unit can implement or execute the various exemplary logical blocks, modules and circuits described in connection with the disclosure. The processor can also be a combination of implementing computing functions, for example, including one or more microprocessors, a combination of DSP and microprocessor, etc.

[0361] ​​​​​​The transmitting unit 1702 may be a communication interface, a transmitter, or a transmitting circuit, etc. Here, the communication interface is a general term, and in a specific implementation, the communication interface may include multiple interfaces.

[0362] The receiving unit 1703 may be a communication interface, a receiver, or a receiving circuit, etc. The communication interface is a general term, and in a specific implementation, the communication interface may include multiple interfaces.

[0363] The transmitting unit 1702 and the receiving unit 1703 can be implemented as the same unit, either physically or logically.

[0364] Storage unit 1704 can be a memory.

[0365] When the processing unit 1701 is a processor, the sending unit 1702 and the receiving unit 1703 are communication interfaces, and the storage unit 1704 is a memory, the communication device involved in the embodiments of this application can be... Figure 18 As shown.

[0366] See Figure 18 As shown, the communication device 1800 includes a processor 1801, a communication interface 1802, and a memory 1803. Optionally, the communication device may also include a bus 1804. The communication interface 1802, processor 1801, and memory 1803 can be interconnected via the bus 1804; the bus 1804 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus 1804 can be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, Figure 18 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0367] Optionally, embodiments of this application also provide a computer program product carrying computer instructions, which, when executed on a computer, causes the computer to perform the methods described in the above embodiments.

[0368] Optionally, embodiments of this application also provide a computer-readable storage medium that stores computer instructions that, when executed on a computer, cause the computer to perform the methods described in the above embodiments.

[0369] Optionally, the embodiment of the present application further provides a chip, comprising: a processing circuit and a transceiver circuit, wherein the processing circuit and the transceiver circuit are used to implement the method introduced in the above embodiment. The processing circuit is used to execute the processing action in the corresponding method, and the transceiver circuit is used to execute the receiving / sending action in the corresponding method.

[0370] In the above embodiments, the implementation can be achieved by software, hardware, firmware or any combination thereof, entirely or partially. When implemented by software, the implementation can be achieved in the form of a computer program product, entirely or partially. The computer program product comprises one or more computer instructions. When the computer instructions are loaded and executed on a computer, the flow or function described in the embodiment of the present application is generated, entirely or partially. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transferred from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media. The available medium can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a digital video disc (DVD)), or a semiconductor medium (such as a solid state drive (SSD)) and the like.

[0371] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented by other ways. For example, the above-described device embodiment is only schematic, for example, the division of the modules is only a logical function division, and actual implementation can have another division way, for example, a plurality of modules or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed each other can be indirect coupling or communication connection through some interfaces, devices or modules, which can be electrical or other forms.

[0372] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple devices. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0373] Through the above description of the embodiments, those skilled in the art can clearly understand that the present application can be implemented by means of software and the necessary general hardware, and of course can also be implemented by hardware, but in many cases the former is a better implementation. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a readable storage medium, such as a computer's floppy disk, hard disk or optical disk, etc., including a number of instructions to make a computer device (which can be a personal computer, server, or network device, etc.) execute the methods described in various embodiments of the present application.

[0374] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and changes or replacements within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An uplink access method, characterized in that, include: The relay device receives at least one Synchronization Signal / Physical Broadcast Channel Block (SSB) from the network device, forwards the at least one SSB, each of the at least one SSB has an index, the index is associated with a plurality of Random Access Channel Opportunities (ROs), and the relay device uses a spatial transmission parameter when forwarding each of the at least one SSB. The relay device uses the first spatial reception parameters on the first RO to receive the uplink access signal from the terminal; Wherein, the first RO is one of the ROs associated with the first index in the index, and the first spatial domain receiving parameter is determined according to the first spatial domain sending parameter used by the relay device to forward the first SSB; The first SSB is the one in the at least one second SSB that is closest to the first RO in the time domain, the at least one second SSB is one or more SSBs with the first index among the at least one SSBs, the at least one second SSB is an SSB of at least one period, and each period of the at least one period includes an SSB with the first index; The first spatial transmission parameter is included in the M spatial transmission parameters corresponding to the first index. The first index corresponds to one spatial transmission parameter in each period of the at least one period. The M spatial transmission parameters are spatial transmission parameters corresponding to two or more periods in the at least one period, and M is a positive integer greater than or equal to 2.

2. The method according to claim 1, characterized in that, The second SSB is the SSB among the at least one SSB that satisfies a preset condition; The preset conditions include: The index of the second SSB is associated with the first RO; The second SSB precedes the first RO; and, The time interval between the second SSB and the first RO is greater than or equal to the first threshold. Alternatively, the preset conditions include: The index of the second SSB is associated with the first RO; The second SSB precedes the first RO; and, The time interval between the second SSB and the first RO is greater than the first threshold.

3. The method according to claim 2, characterized in that, The method further includes: The relay device receives configuration information from the network device, wherein the configuration information is used to configure RO time-frequency resources, and the RO time-frequency resources include at least the time-frequency resources of the first RO; The relay device determines the association between the index of the second SSB and the first RO based on the configuration information.

4. The method according to any one of claims 1-3, characterized in that, The relay device forwards the at least one SSB, including: The relay device periodically forwards SSBs with the first index; The spatial transmission parameters used by the relay device when forwarding the SSB of the first index in the y-th period are the same as the spatial transmission parameters used by the relay device when forwarding the SSB of the first index in the y+M-th period. Two or more of the at least one SSB have the first index, where y is a positive integer.

5. The method according to any one of claims 1-4, characterized in that, The method further includes: The relay device sends first information to the network device, wherein the first information is used to indicate the size of M.

6. The method according to claim 4 or 5, characterized in that, The method further includes: The relay device receives indication information from the network device, the indication information including information indicating m; The relay device determines the target airspace parameters based on the airspace transmission parameters of the SSB forwarded in the x-th cycle, wherein x is an integer determined based on m.

7. The method according to claim 6, characterized in that, The relay device determines the target airspace parameters based on the airspace transmission parameters of the SSB forwarded in the xth cycle, including: The relay device determines the target airspace parameters based on the airspace transmission parameters of any SSB forwarded in the x-th cycle, and the relay device uses the same airspace transmission parameters when forwarding all SSBs in the x-th cycle.

8. The method according to claim 6, characterized in that, The indication information also includes information indicating the first index; The relay device determines the target airspace parameters based on the airspace transmission parameters of the SSB forwarded in the xth cycle, including: The relay device determines the target airspace parameters based on the airspace transmission parameters of the SSB with the first index in the x-th cycle.

9. The method according to any one of claims 6-8, characterized in that, The following condition is satisfied between x and m: The k, M, and N are integers.

10. The method according to any one of claims 6-9, characterized in that, The target spatial parameters include at least one of the following: The target airspace transmission parameters are used by the relay device to forward the information received from the network device to the terminal. The target airspace reception parameters are used by the relay device to receive information from the terminal before forwarding it to the network device.

11. A communication device, characterized in that, include: A processor and a memory, the processor and the memory being coupled, the memory storing program instructions, which, when executed by the processor, cause the communication device to perform the method as described in any one of claims 1-10.

12. A chip, characterized in that, The device includes a processor and an input / output interface, wherein the input / output interface is used to receive signals from other devices outside the chip and transmit them to the processor or to send signals from the processor to other devices outside the chip, and the processor is used to implement the method as described in any one of claims 1-10 through logic circuits or executing code instructions.

13. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed on a communication device, causes the communication device to perform the method as described in any one of claims 1-10.

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