WO2023103873A1

WO2023103873A1 - Method and apparatus for determining random access channel occasion ro

Info

Publication number: WO2023103873A1
Application number: PCT/CN2022/135934
Authority: WO
Inventors: 何泓利; 李雪茹
Original assignee: 华为技术有限公司
Priority date: 2021-12-06
Filing date: 2022-12-01
Publication date: 2023-06-15
Also published as: CN116234052A

Abstract

Embodiments of the present application provide a communication method and apparatus for determining a random access channel occasion (RO). The method comprises: a terminal device receives a target first SSB, the target first SSB being one of multiple first SSBs forwarded by a repeater, each first SSB containing index indication information, and the index indication information being used for indicating an index of the first SSB, and the terminal device determines multiple associated ROs according to the indexes of the first SSBs and a first mapping relationship; the terminal device determines a first identifier corresponding to the target first SSB, and determines a first RO set from the multiple associated ROs according to the first identifier corresponding to the target first SSB and a second mapping relationship, the first RO set comprising at least one RO; and the terminal device sends a random access signal on one RO comprised in the first RO set. By means of the method provided in the present application, the repeater can receive the random access signal sent by the terminal device and forward same to a network device.

Description

Method and device for determining random access signal timing RO

This application claims the priority of the Chinese patent application submitted to the China Patent Office on March 8, 2022, with the application number 202210219320.0, and the application name is "Method and device for determining random access signal timing RO", and December 06, 2021 The priority of the Chinese patent application with the application number 202111480896.4 and the application name "A Beam Training Method" filed with the China Patent Office on 11th, the entire content of which is incorporated in this application by reference.

technical field

The embodiment of the present application relates to the communication field, and, more specifically, relates to a communication method and a communication device for determining a random access signal opportunity RO.

Background technique

Smart repeater (smart repeater, SR), also known as network controlled repeater (network controlled repeater, NCR), is a new type of node used to improve network coverage, the node has LTE (Long Term Evolution, long-term The characteristics of the radio frequency repeater (RF repeater) in the evolution), that is, it has the relay function of amplification and forwarding, which can amplify and forward the radio frequency signal of the network equipment to the terminal equipment, and amplify and forward the signal of the terminal equipment to the network device.

For the random access process of the terminal device, in the existing SR-free network, usually the terminal device will first determine a synchronization signal physical broadcast channel block (synchronization signal block, SSB) or SSB identification (the following does not distinguish between SSB and SSB identification ), for example, by measuring the Reference Signal Receiving Power (RSRP) of each SSB and selecting an SSB whose RSRP is greater than the threshold, the network device will configure a random access channel occasion (RACH) corresponding to the SSB The mapping relationship of RACH occasion (RO), the terminal device will send a random access signal in the direction of the beam receiving the SSB signal on any RO corresponding to the SSB, and the network device will also send a random access signal at the position corresponding to the RO. A possible random access signal is received in the beam direction where the SSB signal is sent. When the channel has spatial beam direction consistency, in a downlink scenario, when the network device sends a signal in the beam direction of the SSB, the terminal device can receive higher signal energy. In an uplink scenario, when the network device and the terminal device use symmetrical beams, the network device can also receive the random access signal of the terminal device with relatively high gain.

However, when SR is configured in the network, since the terminal device still sends random access signals in the direction of receiving the target SSB, and the SR receiving beam direction is uncertain, the receiving beam direction of the SR and the transmitting beam direction of the terminal device may occur Due to the mismatch problem, the SR cannot receive the random access signal of the terminal device, and then cannot forward the random access signal of the terminal device to the network device, resulting in the random access failure of the terminal device.

Contents of the invention

The embodiment of the present application provides a communication method and a communication device for determining the timing RO of a random access signal, which can make the RO of the terminal device send the random access signal aligned with the RO of the repeater receiving the random access signal, and at the same time make the relay The aligned RO uses the matching beam or receiving parameters to receive the random access signal of the terminal device, so that the repeater can receive the random access signal sent by the terminal device with a higher gain, and will not affect the original network equipment. A pattern of synchronization signal blocks SSB is sent.

In a first aspect, a communication method is provided, including: a terminal device receives a target first synchronization signal physical broadcast channel block SSB, the target first SSB is one of multiple first SSBs forwarded by a repeater, and each first The SSB includes index indication information, and the index indication information is used to indicate the index of the first SSB, and determine a plurality of associated random access signal opportunities RO according to the index of the first SSB and the first mapping relationship; the terminal device determines the corresponding The first identifier, according to the first identifier corresponding to the target first SSB and the second mapping relationship, determines the first RO set from multiple associated ROs, the first RO set includes at least one RO; the terminal device includes in the first RO set A random access signal is sent on one RO.

The communication method provided by the embodiment of the present application can make the RO of the terminal device send the random access signal aligned with the RO of the repeater receiving the random access signal, and at the same time enable the repeater to use matching beams or receiving parameters to receive The random access signal of the terminal device enables the repeater to receive the random access signal sent by the terminal device with a higher gain, and will not affect the original pattern of the synchronization signal block SSB sent by the network device.

With reference to the first aspect, in some implementation manners of the first aspect, the determining the first RO set from multiple associated ROs according to the first identifier corresponding to the target first SSB and the second mapping relationship includes: from multiple It is determined that the first RO set in the associated ROs includes M groups of ROs, and the mth group of ROs in the M groups of ROs is determined to be the first RO set according to the first identifier corresponding to the target first SSB, where M is a positive integer and m is less than Or a positive integer equal to M, where the M groups of ROs are obtained by grouping multiple associated ROs according to the second mapping relationship.

With reference to the first aspect, in some implementation manners of the first aspect, the determination of multiple associated ROs according to the first SSB index and the first mapping relationship includes: according to the first SSB index and the first mapping relationship Determine the time-frequency resource configuration information of multiple associated ROs. The time-frequency resource configuration information includes parameters N and L. 1/N represents the number of ROs associated with each SSB in each round of mapping between SSBs and ROs, and L represents the number of ROs associated with each SSB. For each time unit with ROs, the number of corresponding ROs in the frequency domain.

In combination with the first aspect, in some implementations of the first aspect, N, L and M satisfy the relationship:

K is a positive integer, and the second mapping relationship is: multiple associated ROs include multiple rounds of mapped ROs, each round of mapped ROs includes K*M ROs, and the (m-1)th*K*L+ in each round of mapping The 1st to m*K*Lth ROs correspond to the mth group of ROs.

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

With reference to the first aspect, in some implementation manners of the first aspect, M is indicated by the first indication information or M is determined by the terminal device by measuring multiple first SSBs, where the first indication information is associated with the target first SSB.

With reference to the first aspect, in some implementation manners of the first aspect, m is indicated by the second indication information or the m is determined by the terminal device by measuring the multiple first SSBs and the target first SSB, Wherein, the second indication information is associated with the target first SSB.

With reference to the first aspect, in some implementation manners of the first aspect, the terminal device determines that the terminal device is served by the relay according to the third indication information, and the third indication information is used to indicate that the terminal device is served by the relay, or, the terminal The device determines that the terminal device is served by the repeater by measuring the plurality of first SSBs.

With reference to the first aspect, in some implementation manners of the first aspect, receiving the target first SSB by the terminal device includes: receiving the target first SSB by the terminal device using the first airspace reception parameter; and receiving the target first SSB by the terminal device in the first RO set Sending the random access signal includes: the terminal device sends the random access signal on the ROs included in the first RO set using the first airspace transmission parameter, where the first airspace transmission parameter is an airspace transmission parameter corresponding to the first airspace reception parameter.

It should be noted that the first airspace sending parameter may also be the first sending beam, and the first airspace receiving parameter may also be the first receiving parameter.

Optionally, the first airspace sending parameter is an airspace sending parameter corresponding to the first airspace receiving parameter, which may be that the first airspace sending parameter is the same as the first airspace receiving parameter, or that the first airspace sending parameter is the same as the first airspace receiving parameter. The receiving parameters are similar.

In a second aspect, a communication method is provided, including: the repeater receives and forwards the first synchronization signal physical broadcast channel block SSB according to the first cycle, the first SSB includes index indication information, and the index indication information is used to indicate the first SSB In each first period, the repeater uses one of the M airspace transmission parameters to forward the first SSB, wherein, the airspace transmission parameter used in the xth first period and the x+th The airspace transmission parameters used in M first cycles are the same, and M and x are positive integers; the repeater determines multiple associated ROs according to the index of the first SSB and the first mapping relationship; the repeater is on the yth group of ROs Receive random access signals using the second airspace receiving parameters, the yth group of ROs is one of the M groups of ROs, and the M groups of ROs are obtained by grouping multiple associated ROs according to the second mapping relationship, and the second airspace receiving parameters are The airspace receiving parameter corresponding to the airspace sending parameter used for forwarding the first SSB in the y+C first cycle, where C is an integer greater than or equal to zero, and y is a positive integer less than or equal to M.

With reference to the second aspect, in some implementation manners of the second aspect, the repeater determines multiple associated ROs according to the index of the first SSB and the first mapping relationship, including: the repeater determines according to the index of the first SSB and the first mapping relationship A mapping relationship determines the time-frequency resource configuration information of multiple associated ROs. The time-frequency resource configuration information includes parameters N and L. 1/N represents the number of ROs associated with each SSB in each round of mapping between SSBs and ROs. L represents the number of corresponding ROs in the frequency domain for each time unit with ROs.

In combination with the second aspect, in some implementations of the second aspect, N, L and M satisfy the relationship:

Wherein, K is a positive integer, and the second mapping relationship is: multiple associated ROs include ROs of multiple rounds of mapping, ROs of each round of mapping include K*M ROs, and the (y-1)*K*th ROs in each round of mapping L+1 to y*K*Lth ROs correspond to the yth group of ROs.

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

In a third aspect, a communication method is provided, including: a network device sends one or more of the following information to a terminal device: first indication information, second indication information, or third indication information; wherein, the first indication The information is used to indicate M, the second indication information is used to indicate m, and the third indication information is used to indicate that the terminal device is served by the repeater.

According to the fourth aspect, a communication method is provided, including: the terminal device receives indication information or the terminal device measures the RSRP value of the first SSB; the terminal device determines to be served by the repeater according to the indication information or the measurement value.

Through the method provided by the embodiment of the present application, the terminal device determines whether there is a repeater serving it between itself and the network device, and then determines which method to use for determining the RO to determine the RO to send a random access signal.

With reference to the fourth aspect, in a possible implementation of the fourth aspect, the indication information may be third indication information sent by the network device to the terminal device when the terminal device is in the connected state, and the terminal device may pass the third indication information It is determined that the terminal device is served by the repeater, and the third indication information is used to indicate that the terminal device is served by the repeater.

With reference to the fourth aspect, in a possible implementation of the fourth aspect, the indication information may be location indication information sent by the network device to the terminal device when the terminal device is in the connected state, and the terminal device may determine its own location through the location indication information. Whether served by a repeater, the location indication information is used to indicate the geographic location of the repeater, for example, if the distance between the geographic location of the terminal device and the geographic location of a certain repeater is less than the second threshold, the terminal device can Make sure you are served by the repeater. The network device may carry repeater location indication information in the MIB or SIB.

With reference to the fourth aspect, in a possible implementation of the fourth aspect, the terminal device may determine whether it is served by the repeater by measuring the RSRP value of the first SSB, the first SSB being the network device in different first periods For the same SSB sent in the same direction, if the terminal device is served by the repeater, the first SSB is the SSB that can be received and forwarded by the repeater. Determining whether the terminal device is served by the repeater by measuring the RSRP value of the first SSB can be understood as, if the terminal device is served by the repeater, the first SSB is received by the repeater in different first periods and in different directions Therefore, the RSRP value of the first SSB measured by the terminal device in different first periods will be different.

For example, if the variance or the peak-to-average ratio of the RSRP of the first SSB is greater than the third threshold within multiple first periods, the terminal device may determine that it is served by the relay.

For another example, if within two adjacent first periods, the change in the strength of the RSRP of the first SSB is greater than the fourth threshold, the terminal device may determine that it is served by the repeater.

For another example, in multiple first periods, if the normalized non-zero frequency component of the RSRP FFT sequence of the first SSB is greater than the fifth threshold, the terminal device may determine that it is served by the repeater.

In a fifth aspect, a communication device is provided, including a unit for executing the steps of the communication method in the above first aspect and each implementation manner thereof.

In one design, the communication device is a communication chip, and the communication chip may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.

In another design, the communication device is a communication device (for example, a terminal device, etc.), and the communication chip may include a transmitter for sending information, and a receiver for receiving information or data.

In a sixth aspect, a communication device is provided, including a unit configured to execute the steps of the communication method in the above second aspect and each implementation manner thereof.

In another design, the communication device is a communication device (for example, a repeater, etc.), and the communication chip may include a transmitter for sending information, and a receiver for receiving information or data.

In a seventh aspect, a communication device is provided, including a unit for performing the steps of the communication method in the above third aspect and various implementations thereof.

In another design, the communication device is a communication device (for example, a network device, etc.), and the communication chip may include a transmitter for sending information, and a receiver for receiving information or data.

In an eighth aspect, a communication device is provided, including units for performing the steps of the communication method in the fourth aspect and implementations thereof.

In a ninth aspect, a communication device is provided, including a processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the communication device performs the above-mentioned first aspect and Communication methods in its various implementations.

Optionally, there are one or more processors, and one or more memories.

Optionally, the memory may be integrated with the processor, or the memory may be set separately from the processor.

Optionally, the communication device further includes a transmitter (transmitter) and a receiver (receiver).

In a tenth aspect, a communication device is provided, including a processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the communication device performs the above-mentioned second aspect and Communication methods in its various implementations.

Optionally, there are one or more processors, and one or more memories.

In an eleventh aspect, a communication device is provided, including a processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the communication device executes the above third aspect and communication methods in various implementations thereof.

Optionally, there are one or more processors, and one or more memories.

In a twelfth aspect, a communication device is provided, including a processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the communication device performs the fourth aspect above and communication methods in various implementations thereof.

Optionally, there are one or more processors, and one or more memories.

In a thirteenth aspect, a computer program product is provided, the computer program product including: a computer program (also referred to as code, or an instruction), when the computer program is executed, the computer executes the above-mentioned first aspect to Any aspect of the fourth aspect and the communication method in each implementation manner thereof.

In a fourteenth aspect, a communication system is provided, and the system includes: at least one device for executing the method in the first aspect and various implementations thereof.

Optionally, the communication system further includes at least one device for executing the method of the second aspect and various implementation manners thereof.

Optionally, the communication system further includes at least one device for executing the method of the third aspect and various implementation manners thereof.

In a fifteenth aspect, a communication system is provided, and the system includes: at least one device for executing the method of the second aspect and various implementations thereof.

Optionally, the communication system further includes at least one device for executing the method of the first aspect and various implementation manners thereof.

In a sixteenth aspect, a communication system is provided, and the system includes: at least one device for executing the method of the third aspect and various implementations thereof.

In a seventeenth aspect, a chip system is provided, including a memory and a processor, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the communication device installed with the chip system executes The communication method in any one of the above-mentioned aspects and each implementation manner thereof.

Wherein, the chip system may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.

Description of drawings

FIG. 1 is a schematic diagram of a system architecture applied in an embodiment of the present application.

FIG. 2 is a schematic diagram of a network device periodically sending SSBs provided by an embodiment of the present application.

FIG. 3 is an exemplary schematic diagram of a round of mapping when N is less than 1 provided by the embodiment of the present application.

Fig. 4 is a schematic diagram of three periods in the RO mapping relationship.

Fig. 5 is a schematic diagram of an example of a method for determining RO provided by an embodiment of the present application.

FIG. 6 is a schematic diagram of a relay receiving and forwarding a first SSB in multiple first cycles provided by an embodiment of the present application.

FIG. 7 is a schematic diagram of an example of the second mapping relationship provided by the embodiment of the present application.

FIG. 8 is a schematic diagram of another example of the second mapping relationship provided by the embodiment of the present application.

FIG. 9 is a schematic diagram of another example of the second mapping relationship provided by the embodiment of the present application.

Fig. 10 is a schematic diagram of another example of the method for determining RO provided by the embodiment of the present application.

FIG. 11 is a schematic diagram of the network device periodically sending the SSB according to the second period and the relay periodically forwarding the SSB according to the second period in the method 1000.

Fig. 12 is a schematic diagram of an example of a communication device provided by an embodiment of the present application.

Fig. 13 is a schematic diagram of another example of a communication device provided by an embodiment of the present application.

Fig. 14 is a schematic diagram of another example of a communication device provided by an embodiment of the present application.

Detailed ways

The technical solution in this application will be described below with reference to the accompanying drawings.

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

The terminal equipment in the embodiment of the present application may refer to user equipment, access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. The terminal equipment can also be a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), a wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5G networks or terminal devices in the evolved public land mobile network (Public Land Mobile Network, PLMN) etc., which is not limited in this embodiment of the present application.

The network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may be an evolved base station (Evolutional NodeB, eNB or eNodeB) in an LTE system, or a next generation base station (next generation) in an NR system. NodeB, gNB), or a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN) scenario, or the network device can be a relay station, access point, vehicle-mounted device, wearable device, and 5G network The network device in the network device or the network device in the evolved PLMN network is not limited in this embodiment of the present application.

The intelligent repeater is introduced below.

Smart Repeater SR is a new type of node used to improve network coverage. On the one hand, the node has the characteristics of the radio frequency repeater in LTE, that is, it has the relay function of amplification and forwarding, which can amplify and forward the radio frequency signal of the network equipment to the user, and amplify and forward the signal of the terminal equipment to the network equipment. On the other hand, the intelligence of SR is reflected in the ability to receive the control information of its associated network devices, so that it can dynamically adjust its own transmit and receive beam orientation, transmit power, SR node switch status, and working bandwidth according to real-time needs. The SR can serve a specific terminal device, and can control interference caused to other terminal devices.

It is a very important feature to control the orientation of the transmitting and receiving beams of the SR at high frequencies such as millimeter wave frequency bands. In the high-frequency band, the path loss of the signal in the space is particularly large. In order to overcome the large path loss, the sending device and/or the receiving device need to use the beamforming method to send and/or receive the signal, that is, to send and/or receive the signal in a specific beam direction or receive signals. The beams can be wide beams, or narrow beams, or other types of beams. The beam forming technology may be a beam forming technology or other technical means. The beamforming technology may specifically be a digital beamforming technology, an analog beamforming technology, or a hybrid digital/analog beamforming technology. Beams include transmit beams and receive beams. The transmitting beam can refer to the distribution of the signal strength formed in different directions in space after the signal is transmitted by the antenna, and the receiving beam can refer to the distribution of the received signal strength strengthened or weakened by the antenna array in different directions in space. A common implementation of beamforming is to set different amplitude gains and/or phase deviations on multiple transmit/receive antenna units, which can equivalently form a spatial filter to achieve transmission and reception in a specific beam direction . Therefore, different beams may be called or may correspond to different spatial (inter) parameters, spatial (inter) filters or spatial (inter) filter parameters; different transmission beams may be referred to as or may correspond to different spatial (inter) transmission parameters, spatial (inter) transmit filter, and spatial (inter) transmit filter parameters; different receiving beams can be referred to as different spatial (inter) receiving parameters, spatial (inter) receiving filters, and spatial (inter) receiving filters parameter.

Therefore, when the network device can control the beam orientation of the SR in real time, it can dynamically adjust the beam of the SR according to the users it needs to schedule, thereby improving the signal-to-noise ratio of the uplink and downlink signals of the scheduled terminal equipment and improving the reliability of the transmission rate.

FIG. 1 is a schematic diagram of a system architecture applied in an embodiment of the present application. As shown in FIG. 1 , the embodiment of the present application is mainly applied to a 5G system with a repeater, or a 5G evolution system with a repeater. The network elements involved in this embodiment of the present application include network devices, repeaters and terminal devices.

As shown in FIG. 2 , the network device periodically transmits a plurality of different SSBs in each first period, where each SSB may use different airspace transmission parameters. In each first cycle, the network device sends multiple SSBs with the same pattern; in different first cycles, the network device sends the same SSB with the same airspace transmission parameters.

Exemplarily, the first period may be the SSB period as shown in FIG. 2 . Exemplarily, the airspace sending parameter may be the above-mentioned filter parameter.

Wherein, each SSB includes index indication information, the index indication information is used to indicate the index of the SSB, and the index of the SSB and the first mapping relationship are used to determine multiple associated ROs corresponding to the SSB. The index of the SSB is used to distinguish the SSBs in one SSB period. Generally, different SSB indexes correspond to different sending beams used by different SSBs. For example, SSB1 and SSB2 shown in FIG. 2 are two SSBs with different transmit beams, and SSB1 and SSB2 correspond to different SSB indexes. It should be understood that different SSBs correspond to different indexes.

Exemplarily, the first mapping relationship may be a mapping relationship between an SSB index and an RO, that is, the first mapping relationship may be used to determine an RO that sends a random access signal corresponding to a different SSB index.

Exemplarily, the index of the SSB and the time-frequency configuration information of a plurality of associated ROs corresponding to the SSB determined by the first mapping relationship are located in a system information block (system information block, SIB) associated with the SSB, and the time-frequency The configuration information includes the frequency domain location information and the time domain location information of the RO.

Optionally, the frequency domain location information includes the number L of ROs in the frequency domain, where L is an integer. The frequency domain location information may also include the number of corresponding ROs in the frequency domain for each time unit with ROs. The frequency domain location information may also include the starting frequency location of the frequency domain RO, the frequency interval of the frequency domain RO, and the like.

Optionally, the time domain location information includes a physical random access channel (physical random access channel, PRACH) configuration period, the configuration period is usually in units of system frames, that is, the configuration period indicates how many system frames there will be a System frame including RO. The time-domain location information may also include, in each system frame containing ROs, the time slots containing RO resources, and the number of RO resources included in each time slot.

It should be noted that in a time division duplex (time division duplexing, TDD) system, ROs at certain locations may not be available, and available or valid ROs may need to meet certain conditions, for example, the RO cannot contain downlink symbols, It cannot overlap with the symbol of SSB, etc. This embodiment of the present application does not describe it in detail.

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

The above-mentioned round of mapping when N is less than 1 will be illustrated below with reference to FIG. 3 . FIG. 3 is an exemplary schematic diagram of a round of mapping when N is less than 1 provided by the embodiment of the present application.

As shown in (a) of FIG. 3 , a round of mapping between SSB and RO includes 2 time units, and ROs corresponding to 4 SSB1s in time unit 1 represent a round of mapping of SSB1. As shown in (b) of FIG. 3 , a round of mapping between SSB and RO includes 4 time units, and ROs corresponding to 8 SSB1s on time unit 1 and time unit 2 represent a round of mapping of SSB1.

In some embodiments, the terminal device may map the first SSB to a valid RO according to the time-frequency configuration information determined according to the above SSB index and the first mapping relationship. Optionally, the terminal device may map the SSB to the effective RO in the order of frequency mapping first and then time mapping.

Through the mapping of SSB and RO, the network device can align the direction of the beam receiving the random access signal with the direction of the sending beam sending the SSB on the corresponding RO, so that the sending beam of the terminal device sending the random access signal and the network device are in the corresponding Alignment of receive beams for receiving random access signals on the RO.

The following briefly introduces the three cycles in the mapping through FIG. 4 . Fig. 4 is a schematic diagram of three periods in the RO mapping relationship. As shown in Figure 4, one period is the PRACH configuration period introduced earlier, one period is the association period (association period, AP), and the other period is the association pattern period (association pattern period, APP).

As shown in FIG. 4 , an AP includes one or more of the above-mentioned PRACH configuration periods, for example, AP1 includes 4 PRACH periods, and the PRACH period indicates how many system frames in the time domain RO will appear. .

Exemplarily, in an AP, all SSBs are associated with at least one valid RO. In different APs, the position of effective RO may be different (for example, some APs have no SSB, and some APs have SSB), resulting in different patterns of the mapping relationship between SSB and effective RO in different APs. For example, AP1 and AP2 have different patterns of SSB mapping.

APP is defined for the above reasons. Wherein, one APP includes one or more APs. As shown in FIG. 4 , in each APP, the pattern of the mapping relationship between the SSB and the effective RO is the same, or the pattern of the mapping relationship between the SSB and the effective RO is repeated according to the cycle of the APP. FIG. 5 is an example of a method for determining a random access signal opportunity RO provided by an embodiment of the present application. In this method 500, the network device periodically sends the SSB as shown in FIG. 2 . As shown in FIG. 5 , the method 500 includes :

S510. The relay receives and forwards the first SSB according to the first period. Correspondingly, the network device may receive or forward multiple SSBs in each first period.

Optionally, the first period may be an SSB period.

Optionally, the repeater may be a radio frequency repeater, an intelligent repeater, or any future repeater. It should be understood that the embodiment of the present application does not limit the type of the repeater, as long as the repeater has functions such as signal forwarding.

The corresponding airspace transmission parameters or the SSB of the transmission beam towards the repeater can be received and forwarded by the repeater.

It should be noted that the airspace reception parameter for the repeater to receive the SSB may also be fixed, and optionally, the airspace reception parameter is determined through a beam training process.

In the embodiment of the present application, it is assumed that one of the SSBs that can be received by the repeater is the first SSB, and the following will take the first SSB as an example to expand the description.

Exemplarily, in each first period, the relay receives the first SSB, and the relay may use one of the M airspace transmission parameters to forward the first SSB.

Optionally, the airspace transmission parameter used for forwarding the first SSB in the xth first cycle is the same as the airspace transmission parameter used in the x+M first cycle. Wherein, M is a positive integer, and x is a positive integer.

It should be noted that other rules may also be used to determine the airspace transmission parameters for forwarding the first SSB in each first period, which is not limited in this embodiment of the present application. In other words, it can be understood that the M first periods are a large period, and the repeater uses one of the different M airspace transmission parameters to forward the first SSB in each first period within a large period, Repeat the above process from the next big cycle.

Optionally, the M is related to the relative position relationship between the network device and the repeater. Or, the M is related to its corresponding SSB, or, the M is related to the nature of the repeater. Alternatively, the M may be configured by the network device on the repeater, or the M may be determined by the repeater itself, and then reported to the network device.

Exemplarily, FIG. 6 is a schematic diagram of the relay receiving and forwarding the first SSB in multiple first periods. As shown in FIG. 6 , for example, assuming that M is 2, then two first periods (ie, SSB periods) are one large period. The first SSB in FIG. 6 corresponds to SSB1, that is, the SSB received by the repeater. The repeater forwards the first SSB, namely SSB1, to the beam direction of SSB1-1 in the first first cycle shown in FIG. 6, and the repeater forwards the first SSB in the second first cycle shown in FIG. SSB, that is, SSB1 forwards to the beam direction of SSB1-2, and the repeater forwards the first SSB, namely SSB1, to the beam direction of SSB1-1 in the third first cycle shown in Figure 6, and the repeater forwards the first SSB, namely SSB1, to the beam direction of SSB1-1 in Figure 6. The first SSB, that is, SSB1, is forwarded to the beam direction of SSB1-2 in the fourth first cycle, and so on.

It should be noted that forwarding the first SSB according to the first periodic polling by the repeater is only a form of forwarding the first SSB by the repeater, and the repeater can also forward the first SSB according to other rules. This application uses An example is used for description, but this application does not limit it.

It should be noted that not all the first SSB forwarded by the repeater using different airspace transmission parameters or transmission beams can be received by the terminal device. Or, among the first SSBs forwarded by the repeater using different airspace transmission parameters or transmission beams, some first SSBs can be received by the terminal device with a stronger RSRP, and some first SSBs can be received by the terminal device with a weaker RSRP .

It should be noted that the repeater may forward multiple different SSBs within one first period. Optionally, the first SSB is included. In other words, the multiple different SSBs sent by the network device in the first period may be received by the repeater, and the repeater can forward the multiple different SSBs. When the repeater forwards multiple different SSBs, the steps related to a single SSB in this embodiment of the application can be applied to multiple different SSBs, without affecting the essence of the embodiment of this application, and will not be described here.

S520. The relay determines multiple associated ROs according to the index of the first SSB and the first mapping relationship.

It should be noted that this step is similar to the method for determining multiple associated ROs corresponding to the SSB shown in FIG. 2 , and reference may be made to the previous description, and details are not repeated here.

S530. The repeater uses the second airspace receiving parameter to receive random access signals on the yth group of ROs. The yth group of ROs belongs to M groups of ROs, and the M groups of ROs are obtained by grouping multiple associated ROs according to the second mapping relationship. .

Exemplarily, the y may be any integer from 1 to M. In other words, the repeater receives random access signals using the corresponding second airspace reception parameters on one or more groups of the first to Mth groups of ROs, or, the repeater receives random access signals in the first to Mth groups One or more groups of ROs in a group of ROs direct receiving beams to corresponding directions.

It should be understood that the second airspace receiving parameter used by the repeater on the yth group of ROs is the airspace receiving parameter corresponding to the airspace sending parameter used for forwarding the first SSB in the y+Cth first cycle. Wherein, C is an integer greater than or equal to 0, and y is a positive integer less than or equal to M.

The following will introduce how the repeater divides multiple associated ROs into M groups of ROs according to the second mapping relationship.

Optionally, the parameters N and L involved in Figure 2 and the above M can satisfy the relational expression:

Among them, K is a positive integer.

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

Wherein, each round of mapping is each round of mapping in multiple rounds of mapping, and the meaning of each round of mapping in multiple rounds of mapping is the same as that of the above round of mapping.

Fig. 7 is a schematic diagram of an example of the second mapping relationship. As shown in FIG. 7, L=4, 1/N=8, K=1, M=2. At this time, the number of ROs in the frequency domain is 4, and each SSB maps 8 ROs in one round of mapping, that is, the ROs occupying two time units. At this time, the first and second airspace receiving parameters of the repeater can be Corresponding to the 4 ROs in the first time unit, the second second airspace receiving parameter of the repeater may correspond to the 4 ROs in the second time unit. In other words, the repeater adjusts the parameters of the receiving beam to the first and second airspace receiving parameters on the 4 ROs corresponding to the first time unit, and the repeater adjusts the parameters on the 4 ROs corresponding to the second time unit Adjust the parameters of the receiving beam to the second second airspace receiving parameters.

Optionally, the second mapping relationship may be: among the multiple associated ROs corresponding to the first SSB, the RO included in the yth AP among the M APs is the yth group of ROs. Wherein, M=B*A, A is the number of APs included in one APP determined according to the first mapping relationship, and B is M APs included in B APPs determined according to the first mapping relationship. A and B are positive integers.

FIG. 8 is a schematic diagram of another example of the second mapping relationship. Optionally, the second mapping relationship may be: among the multiple associated ROs corresponding to the first SSB, the RO included in the y+D*Mth AP in each APP belongs to the yth group of ROs, or, every The RO included in the D+y*Dth AP in the APP belongs to the yth group of ROs. Wherein, A=D*M, and A is the number of APs included in an APP determined according to the first mapping relationship. A and D are positive integers.

FIG. 9 is a schematic diagram of another example of the second mapping relationship. Optionally, the second mapping relationship may be: the RO included in the jth AP in the ith APP among the multiple associated ROs corresponding to the first SSB belongs to the yth group of ROs. Wherein, y may be mod[(i-1)*A+j-1, M], and A is the number of APs included in an APP determined according to the first mapping relationship. A, i, j are all positive integers.

It should be noted that, according to the above-mentioned second mapping relationship, the relay can determine the 1st-Mth group of ROs from the multiple associated ROs corresponding to the first SSB, corresponding to the M second airspace receiving parameters respectively.

Optionally, the repeater may align the parameters of the receiving beam with the corresponding second airspace reception parameters on one or more groups of ROs in the M groups of ROs on the corresponding second airspace reception parameters.

It should be understood that the relay may receive the random access signal in a certain group of ROs in the M groups of ROs.

S540. The terminal device receives the target first SSB, and determines multiple associated ROs according to the index of the first SSB and the first mapping relationship.

Exemplarily, the target first SSB may be the first SSB with the strongest RSRP received by the terminal device, and the target first SSB may also be a first SSB with the RSRP received by the terminal device exceeding the first threshold. Optionally, the first threshold is a preset value.

It should be noted that the target first SSB is one of the multiple first SSBs forwarded by the relay in multiple first periods.

The terminal device may determine multiple associated ROs according to the index of the first SSB and the first mapping relationship. The method for the terminal device to determine multiple associated ROs according to the index of the first SSB and the first mapping relationship is similar to the method shown in FIG. 2 above, and reference may be made to the method shown in FIG. 2 , which will not be repeated here.

S550. The terminal device determines a first identifier corresponding to the target first SSB, and determines a first RO set from multiple associated ROs according to the first identifier corresponding to the target first SSB and the second mapping relationship.

It should be noted that the first identifier corresponding to the target first SSB is different from the first identifiers corresponding to other first SSBs forwarded by the relay.

Exemplarily, the terminal device determines the first RO set from multiple associated ROs according to the first identifier corresponding to the target first SSB and the second mapping relationship, and the terminal device may determine M The mth group of ROs in the group of ROs is the first set of ROs.

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

Optionally, the terminal device may determine M through the first indication information.

Specifically, the first indication information is associated with the target first SSB. Optionally, the first indication information may be located in the payload of the target first SSB, or in the MIB of the target first SSB. Optionally, the first indication information may be located in the SIB, and the association between the SIB and the first SSB can be understood as the resource set (CORESET) and/or the physical downlink on the search space (SearchSpace) indicated by the MIB in the target first SSB A control channel (Physical Downlink Control Channel, PDCCH)/downlink control information (Downlink Control Information, DCI) schedules the SIB.

Optionally, the terminal device may determine M by measuring the first SSB of the target. Exemplarily, the terminal device may measure RSRP time series of multiple first SSBs, extract the period of RSRP change from the time series, and further determine M.

Optionally, the terminal device may determine M through other indication information of the network device. It should be noted that the indication information is sent by the network device to the terminal device when the terminal device is in a connected state.

Exemplarily, the terminal device also needs to determine the first identifier corresponding to the target first SSB. Namely, m. Optionally, the terminal device may determine the first identifier corresponding to the target first SSB by measuring the target first SSB.

Exemplarily, the terminal device may determine the first identifier corresponding to the target first SSB by measuring the system frame number (System frame number, SFN) where the target first SSB is located. For example, when the terminal device detects the target first SSB in the system frame SFN (or detects that the RSRP of the target first SSB is greater than or equal to the first identifier in the system frame SFN), it may determine that the target first SSB corresponds to the first Identified as:

Among them, T _frame represents the frame length, which is generally 10ms in the NR system, and can also be other values. half_frame is a half-frame indication, which can be equal to 0 or 1, indicating that the first SSB of the target is located within a frame (the frame length is 10ms) The first half frame or the second half frame, T _SSB represents the period of SSB. It should be noted that the meaning of the mod function is to divide the first number in the brackets by the second number in the brackets to get the remainder.

Optionally, the terminal device may determine the first identifier corresponding to the target first SSB through the second indication information.

The second indication information may be associated with the target first SSB. Optionally, the second indication information may be located in the payload indication information of the target first SSB, for example, in the payload of the SSB in NR R16

It is a reserved bit, and the second indication information may be located in the reserved bit, or may be located in other newly set bits, which is not limited in this embodiment of the present application. Optionally, the second indication information may be located in the MIB carried by the target first SSB.

Optionally, the terminal device may determine the first identifier corresponding to the target first SSB through other indication information of the network device. Exemplarily, the network device may send indication information to the terminal device when the terminal device is in the connected state, indicating the first identifier corresponding to the target first SSB.

Further, the terminal device may determine the mth group of ROs, that is, the first RO set corresponding to the first identifier, according to M, m, and the second mapping relationship.

It should be noted that the second mapping relationship is similar to the description in step S530. In this step, it is only necessary to determine the mth group of ROs, which will not be repeated here.

It should be noted that, before the terminal device determines the first RO set according to M, m and the second mapping relationship, it needs to determine that it is served by the relay.

Optionally, the terminal device may determine that it is served by the repeater through third indication information sent by the network device when the terminal device is in the connected state, where the third indication information is used to indicate that the terminal device is served by the repeater.

Optionally, the terminal device can determine whether it is served by the repeater through the location indication information of the repeater sent by the network device, for example, if the distance between the geographic location of the terminal device and the geographic location of a certain repeater is less than the two thresholds, the terminal device can determine that it is served by the repeater. The network device may carry repeater location indication information in the MIB or SIB.

Optionally, the terminal device may determine whether it is served by the repeater by measuring the RSRP value of the first SSB.

For another example, in multiple first periods, if the non-zero frequency component after the normalization of the fast Fourier transform (FFT) sequence of the RSRP of the first SSB is greater than the fifth threshold, the terminal device may determine that it is Repeater service.

S560. The terminal device sends a random access signal on one RO included in the first RO set.

Optionally, the terminal device sends the random access signal using the first airspace transmission parameter, the first airspace transmission parameter is the airspace transmission parameter corresponding to the first airspace reception parameter, and the first airspace reception parameter is the first SSB of the terminal device receiving target The airspace receives parameters.

It should be understood that the first airspace sending parameter may be the same as the first airspace receiving parameter. The first airspace sending parameter may also be similar to the first airspace receiving parameter.

Optionally, the terminal device may use a first sending beam to send a random access signal, where the first sending beam is a sending beam corresponding to a first receiving beam, and the first receiving beam is a receiving beam where the terminal device receives the target first SSB.

It should be understood that the first transmitting beam and the first receiving beam may be beams with similar parameters, and the similar beams may be understood as, for example, the first transmitting beam is a coarse beam, the first receiving beam is a thin beam, and the coarse beam includes a thin beam wait.

It should be understood that the first sending beam and the first receiving beam may also be beams with the same parameters.

It should be noted that the sequence of step S520-step S560 may not be fixed.

The method provided by the embodiment of this application can make the RO of the terminal device send the random access signal aligned with the RO of the repeater receiving the random access signal, and at the same time make the repeater use the matched beam to receive the random access signal of the terminal device in the aligned RO. The access signal enables the repeater to receive the random access signal sent by the terminal device with a higher gain, and will not affect the original SSB pattern sent by the network device.

Fig. 10 is a schematic diagram of another example of the method for determining RO provided by the embodiment of the present application. In the method provided in FIG. 10 , the pattern pattern of sending SSB by the network device as introduced in FIG. 2 is changed. As shown in FIG. 10 , the method 1000 includes:

S1010. The network device sends multiple sets of SSBs according to the second period.

It should be understood that the meaning of the second period is the same as that of the above-mentioned second period. Reference may be made to the foregoing description, and details are not repeated here.

FIG. 11 is a schematic diagram of the network device periodically sending the SSB according to the second period and the relay periodically forwarding the SSB according to the second period in the method 1000. As shown in FIG. 11 , the network device transmits multiple groups of SSBs in each second period, wherein each group of SSBs includes Z SSBs, the airspace transmission parameters corresponding to each group of SSBs are the same, and the indexes corresponding to the Z SSBs are different. This second period corresponds to the SSB period in FIG. 11 . Z is a positive integer greater than 1.

Exemplarily, as shown in Figure 11, the network device sends two sets of SSBs, where the value of Z is 2, that is, each set of SSBs corresponds to two different SSBs, one set of SSBs corresponds to SSB1 and SSB2, and the other set of SSBs Corresponds to SSB3 and SSB4.

It should be understood that for the meaning of Z in the method 1000, reference may be made to the meaning of the above M, and the meaning of the index and the meaning of the airspace transmission parameters may refer to the above description, and details are not repeated here.

S1020. The repeater receives and forwards a group of SSBs according to the second period.

It should be understood that the repeater receives a group of SSBs in each second cycle, and uses different airspace transmission parameters to forward multiple SSBs included in the group of SSBs in each second cycle.

Exemplarily, as shown in FIG. 11 , the repeater receives SSB3 and SSB4, and uses two kinds of airspace transmission parameters to forward SSB3 and SSB4 respectively.

S1030. The terminal device receives the second SSB, and determines multiple associated ROs according to the index of the second SSB and the first mapping relationship.

Exemplarily, the second SSB may be the SSB with the strongest RSRP received by the terminal device, and the second SSB may also be an SSB in which the RSRP received by the terminal device exceeds the first threshold.

The method for the terminal device to determine multiple associated ROs according to the index of the second SSB and the first mapping relationship is similar to the above-mentioned method for the terminal device to determine multiple associated ROs according to the index of the first SSB and the first mapping relationship. repeat.

S1040, the terminal device sends a random access signal on an RO in multiple associated ROs.

For the airspace transmission parameters used by the terminal device to send the random access signal, reference may be made to the description in S560, which will not be repeated here.

S1050, the relay determines the forwarded RO associated with each SSB according to the SSB index and the first mapping relationship, and receives a random access signal on the RO associated with each SSB.

It should be noted that, for the related description of the airspace receiving parameters used by the repeater to receive the random access signal, reference may be made to step S530, which will not be repeated here. That is, the random access signal corresponding to each SSB is received by using the airspace reception parameter corresponding to the airspace transmission parameter for forwarding each SSB.

It should be noted that the sequence of step S1040 and step S1050 may not be fixed.

In the method provided by the embodiment of this application, by changing the SSB pattern sent by the network device, the SSB index and the first mapping relationship can be used to make the repeater receive the random access signal of the terminal device using a matching beam in the aligned RO, so that the The repeater can receive the random access signal sent by the terminal equipment with a higher gain

FIG. 12 is an example of a communication device according to an embodiment of the present application. As shown in FIG. 12 , the communication device 1200 includes a transceiver unit 1210 and a processing unit 1220 .

In some embodiments, the communication apparatus 1200 may be used to implement the functions of the terminal device involved in any of the above methods. For example, the communication apparatus 1200 may correspond to a terminal device.

The communication apparatus 1200 may be a terminal device, and executes the steps performed by the terminal device in the foregoing method embodiments. The transceiver unit 1210 can be used to support the communication device 1200 to communicate, for example, to perform the sending and/or receiving actions performed by the terminal device in the above method embodiments, and the processing unit 1220 can be used to support the communication device 1200 to perform the above method embodiments. The processing actions include, for example, executing the processing actions performed by the terminal device in the foregoing method embodiments.

Optionally, the communication device may further include a storage unit 1230 (not shown in FIG. 10 ), configured to store program codes and data of the communication device.

Specifically, you can refer to the following description:

Transceiving unit 1210: used to receive the target first synchronization signal block SSB, the target first SSB is one of the multiple first SSBs forwarded by the repeater, each first SSB contains index indication information, and the index indication information is used to indicate Index of the first SSB.

The processing unit 1220 is configured to determine multiple associated random access signal opportunities RO according to the index of the first SSB and the first mapping relationship.

The processing unit 1220 is further configured to determine an identifier corresponding to the target first SSB, and determine a first RO set from multiple associated ROs according to the first identifier corresponding to the target first SSB and the second mapping relationship, and the first RO combination includes At least one RO.

The transceiver unit 1210 is further configured to send a random access signal on an RO included in the first RO set.

The processing unit 1220 is further configured to determine the first RO set from multiple associated ROs according to the first identifier corresponding to the target first SSB and the second mapping relationship includes: the processing unit 1220 is configured to determine from the multiple associated ROs The first RO set includes M groups of ROs, and according to the first identifier corresponding to the target first SSB, it is determined that the mth group of ROs in the M groups of ROs is the first RO set, M is a positive integer, and m is a positive integer less than or equal to M, The M groups of ROs are obtained by grouping multiple associated ROs according to the second mapping relationship.

The processing unit 1220 is further configured to determine multiple associated ROs according to the index of the first SSB and the first mapping relationship, including: when the processing unit determines the multiple associated ROs according to the index of the first SSB and the first mapping relationship Frequency resource configuration information, time-frequency resource configuration information includes parameters N and L, 1/N represents the number of ROs associated with each SSB in each round of mapping between SSBs and ROs, L represents each time unit with ROs, The number of corresponding ROs in the frequency domain.

Optionally, N, L and M satisfy the relation:

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

Optionally, M is indicated by the first indication information, or M is determined by the processing unit 1220 by measuring multiple first SSBs, where the first indication information is associated with the target first SSB.

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

Optionally, the processing unit 1220 is further configured to determine that the communication device is served by a repeater according to the third indication information, and the third indication information is used to indicate that the communication device is served by a repeater, or the processing unit 1220 measures a plurality of The first SSB determines that the communication device is served by the repeater.

Optionally, the transceiver unit 1210 is configured to receive the target first SSB, including:

The transceiver unit 1210 is configured to receive the target first SSB by using the first airspace reception parameter.

Optionally, the transceiver unit 1210 is configured to send a random access signal on the ROs included in the first RO set, including:

The transceiver unit 1210 is configured to use a first airspace transmission parameter to send a random access signal on ROs included in the first RO set, where the first airspace transmission parameter is an airspace transmission parameter corresponding to the first airspace reception parameter.

In some embodiments, the communication device 1200 may be used to realize the function of the repeater involved in any of the above methods. For example, the communication device 1200 may correspond to a repeater.

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

Optionally, the communication device may further include a storage unit 1230 (not shown in FIG. 12 ), configured to store program codes and data of the communication device.

Specifically, you can refer to the following description:

The transceiver unit 1210: used to receive and forward the first SSB according to the first period, the first SSB includes index indication information, the index indication information is used to indicate the index of the first SSB, and in each first period, the repeater uses M One of the airspace transmission parameters in the airspace transmission parameters forwards the first SSB, wherein the airspace transmission parameters used in the xth first cycle are the same as the airspace transmission parameters used in the x+M first cycle, M, x is a positive integer.

The processing unit 1220 is configured to determine multiple associated ROs according to the index of the first SSB and the first mapping relationship.

The transceiver unit 1010 is also configured to receive random access signals on the yth group of ROs using the second airspace reception parameter. The yth group of ROs is one of the M groups of ROs. Obtained by the associated RO group, the second airspace receiving parameter is the airspace receiving parameter corresponding to the airspace sending parameter used for forwarding the first SSB in the y+C first cycle, where C is an integer greater than or equal to zero, and y is less than Or a positive integer equal to M.

Optionally, N, L and M satisfy the relation:

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

FIG. 13 is an example of a signal transmission device 1300 provided by an embodiment of the present application. As shown in FIG. 13 , the device 1300 includes: a transceiver 1310 , a processor 1320 and a memory 1330 . The memory 1330 is used to store instructions. The processor 1320 is coupled with the memory 1330, and is configured to execute instructions stored in the memory, so as to execute the method provided by the foregoing embodiments of the present application.

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

It should be understood that the above-mentioned memory 1330 and processor 1320 may be combined into one processing device, and the processor 1320 is used to execute the program code stored in the memory 1330 to realize the above-mentioned functions. During specific implementation, the memory 1330 may also be integrated in the processor 1320 , or be independent of the processor 1310 .

FIG. 14 is a schematic diagram of another example of a communication device according to an embodiment of the present application. The communication device may be used to execute the method performed by the above-mentioned repeater or terminal device, as shown in FIG. 14, the communication device includes:

At least one input interface (Input(s)) 1410 , a logic circuit 1420 , and at least one output interface (Output(s)) 1430 . Optionally, the above-mentioned logic circuit may be a chip, or other integrated circuits that can implement the method of the present application.

The input interface 1410 is used to input or receive data; the output interface 1430 is used to output or send data; the logic circuit 1420 is used to execute various possible methods as described above in FIG. 5 .

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

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

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims

A method for determining a random access signal opportunity RO, characterized in that it includes:

The terminal device receives the target first synchronization signal physical broadcast channel block SSB, the target first SSB is one of multiple first SSBs forwarded by the repeater, and each first SSB includes index indication information, and the index indication information Used to indicate the index of the first SSB, and determine a plurality of associated random access signal opportunities RO according to the index of the first SSB and the first mapping relationship;

The terminal device determines the first identifier corresponding to the target first SSB, and determines a first RO set from the plurality of associated ROs according to the first identifier corresponding to the target first SSB and the second mapping relationship, and the The first RO set includes at least one RO;

The terminal device sends a random access signal on one RO included in the first RO set.
The method according to claim 1, wherein the determining the first RO set from the plurality of associated ROs according to the first identifier corresponding to the target first SSB and the second mapping relationship comprises:

Determine from the plurality of associated ROs that the first RO set includes M groups of ROs, and determine that the mth group of ROs in the M groups of ROs is the first according to the first identifier corresponding to the target first SSB. RO set, the M is a positive integer, the m is a positive integer less than or equal to the M, and the M groups of ROs are obtained by grouping the plurality of associated ROs according to the second mapping relationship.
The method according to claim 1 or 2, wherein the determining multiple associated ROs according to the index of the first SSB and the first mapping relationship comprises:

Determine the time-frequency resource configuration information of the plurality of associated ROs according to the index of the first SSB and the first mapping relationship, where the time-frequency resource configuration information includes parameters N and L, and the 1/N indicates that the SSB and In each round of RO mapping, the number of ROs associated with each SSB, the L indicates the number of corresponding ROs in the frequency domain for each time unit with ROs.
The method according to claim 3, wherein said N, said L and said M satisfy the relationship:
The K is a positive integer, and the second mapping relationship is: the multiple associated ROs include ROs of multiple rounds of mapping, and the ROs of each round of mapping include K*M ROs, and the (m-1th ROs in each round of mapping )*K*L+1 to m*K*Lth ROs correspond to the mth group of ROs.
The method according to claim 3, wherein the second mapping relationship is: the RO included in the j-th association period AP in the i-th association pattern period APP among the plurality of associated ROs belongs to the The mth group of ROs, where m=mod[(i-1)*A+j-1, M], the A is the number of APs included in an APP determined according to the first mapping relationship, the A, said i and said j are positive integers.
The method according to any one of claims 2 to 5, wherein the M is indicated by first indication information or the M is determined by the terminal device by measuring the multiple first SSBs, wherein, The first indication information is associated with the target first SSB.
The method according to any one of claims 2 to 6, wherein the m is indicated by the second indication information or the m is measured by the terminal device by measuring the plurality of first SSBs and the target The first SSB is determined, wherein the second indication information is associated with the target first SSB.
The method according to any one of claims 1 to 7, further comprising:

The terminal device determines that the terminal device is served by the relay according to third indication information, where the third indication information is used to indicate that the terminal device is served by the relay, or,

The terminal device determines that the terminal device is served by the repeater by measuring the plurality of first SSBs.
The method according to any one of claims 1 to 8, wherein the receiving the target first SSB by the terminal device comprises:

The terminal device receives the target first SSB using a first airspace reception parameter;

The terminal device sends a random access signal on the ROs included in the first RO set, including:

The terminal device sends the random access signal using a first airspace transmission parameter on the ROs included in the first RO set, where the first airspace transmission parameter is an airspace transmission parameter corresponding to the first airspace reception parameter .
A method for determining a random access signal opportunity RO, characterized in that it includes:

The repeater receives and forwards the first synchronization signal physical broadcast channel block SSB according to the first period, and the first SSB includes index indication information, and the index indication information is used to indicate the index of the first SSB. Within one cycle, the repeater forwards the first SSB using one of the M airspace transmission parameters, wherein the airspace transmission parameter used in the xth first cycle and the x+Mth The airspace sending parameters used in one cycle are the same, the M and the x are positive integers;

The repeater determines multiple associated ROs according to the index of the first SSB and the first mapping relationship;

The repeater receives a random access signal using the second airspace reception parameter on the yth group of ROs, the yth group of ROs is one of the M groups of ROs, and the M groups of ROs are based on the second mapping The relationship is obtained by grouping the multiple associated ROs, the second airspace receiving parameter is an airspace receiving parameter corresponding to the airspace sending parameter used for forwarding the first SSB in the y+Cth first period, and the C is an integer greater than or equal to zero, and the y is a positive integer less than or equal to the M.
The method according to claim 10, wherein the repeater determines multiple associated ROs according to the index of the first SSB and the first mapping relationship, comprising:

The relay determines time-frequency resource configuration information of the plurality of associated ROs according to the index of the first SSB and the first mapping relationship, where the time-frequency resource configuration information includes parameters N and L, and the 1/ N represents the number of ROs associated with each SSB in each round of mapping between SSBs and ROs, and L represents the number of corresponding ROs in the frequency domain for each time unit with ROs.
The method according to claim 10 or 11, wherein said N, said L and said M satisfy the relationship:
The K is a positive integer, and the second mapping relationship is: the multiple associated ROs include ROs of multiple rounds of mapping, and the ROs of each round of mapping include K*M ROs, and the (y-1th ROs) in each round of mapping )*K*L+1 to y*K*Lth ROs correspond to the yth group of ROs.
The method according to claim 10 or 11, wherein the second mapping relationship is: the RO included in the j-th association period AP in the i-th association pattern period APP among the plurality of associated ROs belongs to The yth group of ROs, where y=mod[(i-1)*A+j-1, M], the A is the number of APs included in an APP determined according to the first mapping relationship, The A, the i, and the j are positive integers.
A communication device for determining a random access signal opportunity RO, characterized in that it includes:

A transceiver unit, configured to receive a target first synchronization signal physical broadcast channel block SSB, where the target first SSB is one of multiple first SSBs forwarded by the repeater, and each first SSB includes index indication information, the The index indication information is used to indicate the index of the first SSB;

a processing unit, configured to determine a plurality of associated random access signal opportunities RO according to the index of the first SSB and the first mapping relationship;

The processing unit is further configured to determine a first identifier corresponding to the target first SSB, and determine the first identifier from the plurality of associated ROs according to the first identifier corresponding to the target first SSB and the second mapping relationship. RO set, the first RO set includes at least one RO;

The transceiver unit is further configured to send a random access signal on one RO included in the first RO set.
The communication device according to claim 14, wherein the processing unit is configured to determine the first RO from the plurality of associated ROs according to the first identifier corresponding to the target first SSB and the second mapping relationship collection, including:

The processing unit is configured to determine from the plurality of associated ROs that the first RO set includes M groups of ROs, and determine the mth group in the M groups of ROs according to the first identifier corresponding to the target first SSB RO is the first RO set, the M is a positive integer, the m is a positive integer less than or equal to M, and the M groups of ROs are grouping the plurality of associated ROs according to the second mapping relationship owned.
The communication device according to claim 14 or 15, wherein the processing unit is configured to determine multiple associated ROs according to the index of the first SSB and the first mapping relationship, including:

The processing unit is configured to determine time-frequency resource configuration information of the multiple associated ROs according to the index of the first SSB and the first mapping relationship, where the time-frequency resource configuration information includes parameters N and L, and the 1 /N indicates the number of ROs associated with each SSB in each round of mapping between SSBs and ROs, and L indicates the number of corresponding ROs in the frequency domain for each time unit with ROs.
The communication device according to claim 16, wherein the N, the L and the M satisfy the relationship:
The K is a positive integer, and the second mapping relationship is: the multiple associated ROs include ROs of multiple rounds of mapping, and the ROs of each round of mapping include K*M ROs, and the (m-1th ROs in each round of mapping )*K*L+1 to m*K*Lth ROs correspond to the mth group of ROs.
The communication device according to claim 16, wherein the second mapping relationship is: the RO included in the j-th association period AP in the i-th association pattern period APP among the plurality of associated ROs belongs to the The mth group of ROs, where m=mod[(i-1)*A+j-1, M], the A is the number of APs included in an APP determined according to the first mapping relationship, so Said A, said i, said j are positive integers.
The communication device according to any one of claims 15 to 18, wherein the M is indicated by first indication information or the M is determined by the processing unit by measuring the plurality of first SSBs, wherein , the first indication information is associated with the target first SSB.
The communication device according to any one of claims 15 to 19, wherein the m is indicated by the second indication information or the m is measured by the processing unit by measuring the plurality of first SSBs and the The target first SSB is determined, wherein the second indication information is associated with the target first SSB.
The communication device according to any one of claims 14 to 20, wherein the processing unit is further configured to:

determining that the communication device is served by the relay according to third indication information, where the third indication information is used to indicate that the communication device is served by the relay, or,

Determining that the communication device is served by the repeater by measuring the first plurality of SSBs.
The communication device according to any one of claims 14 to 21, characterized in that,

The transceiver unit is used to receive the target first SSB, including:

The transceiver unit is configured to receive the target first SSB using a first airspace reception parameter;

The transceiver unit is configured to send a random access signal on the ROs included in the first RO set, including:

The transceiver unit is configured to send the random access signal using a first airspace transmission parameter on ROs included in the first RO set, where the first airspace transmission parameter is an airspace corresponding to the first airspace reception parameter Send parameters.
A communication device for determining a random access signal opportunity RO, characterized in that it includes:

The transceiver unit is configured to receive and forward the first synchronization signal physical broadcast channel block SSB according to the first period, the first SSB includes index indication information, and the index indication information is used to indicate the index of the first SSB, in each In the first period, the repeater forwards the first SSB using one of the M airspace transmission parameters, wherein the airspace transmission parameter used in the xth first period and the x+Mth The airspace transmission parameters used in the first cycle are the same, the M and the x are positive integers;

a processing unit, configured to determine multiple associated ROs according to the index of the first SSB and the first mapping relationship;

The transceiver unit is further configured to receive a random access signal on the yth group of ROs using the second airspace receiving parameter, the yth group of ROs is a group of M groups of ROs, and the M groups of ROs are based on the yth group of ROs. Two mapping relationships are obtained by grouping the plurality of associated ROs, the second airspace receiving parameter is an airspace receiving parameter corresponding to the airspace sending parameter used for forwarding the first SSB in the y+C first period, The C is an integer greater than or equal to zero, and the y is a positive integer less than or equal to the M.
The communication device according to claim 23, wherein the processing unit is configured to determine multiple associated ROs according to the index of the first SSB and the first mapping relationship, comprising:

The processing unit is configured to determine time-frequency resource configuration information of the multiple associated ROs according to the index of the first SSB and the first mapping relationship, where the time-frequency resource configuration information includes parameters N and L, and the 1 /N indicates the number of ROs associated with each SSB in each round of mapping between SSBs and ROs, and L indicates the number of corresponding ROs in the frequency domain for each time unit with ROs.
The communication device according to claim 23 or 24, wherein the N, the L and the M satisfy the relationship:
The K is a positive integer, and the second mapping relationship is: the multiple associated ROs include ROs of multiple rounds of mapping, and the ROs of each round of mapping include K*M ROs, and the (y-1th ROs) in each round of mapping )*K*L+1 to y*K*Lth ROs correspond to the yth group of ROs.
The communication device according to claim 23 or 24, wherein the second mapping relationship is: the RO included in the j-th association period AP in the i-th association pattern period APP among the plurality of associated ROs Belonging to the yth group of ROs, where y=mod[(i-1)*A+j-1, M], the A is the number of APs included in an APP determined according to the first mapping relationship , the A, the i, and the j are positive integers.
A communication device, characterized in that it includes at least one processor, the processor is coupled to the memory:

The memory is used to store program instructions and data;

The processor is configured to execute instructions in the memory, so as to implement the method according to any one of claims 1-9 or 10-13.
A communication device, characterized in that it includes a logic circuit and an input-output interface:

The input and output interface is used to input or output data or information;

The logic circuit is used to execute the method according to any one of claims 1 to 9 or 10 to 13 according to the data or information.
A computer-readable storage medium, characterized in that computer instructions are stored on the computer-readable medium, and when the computer instructions are run on a computer, the computer is made to execute any one of claims 1 to 13. the method described.
A computer program product comprising instructions, characterized in that, when run on a computer, the method according to any one of claims 1 to 9 is executed, or the method according to any one of claims 10 to 13 is executed. The method described in item is executed.