CN116234052A

CN116234052A - Method and device for determining random access signal opportunity RO

Info

Publication number: CN116234052A
Application number: CN202210219320.0A
Authority: CN
Inventors: 何泓利; 李雪茹
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-12-06
Filing date: 2022-03-08
Publication date: 2023-06-06
Also published as: WO2023103873A1

Abstract

The embodiment of the application provides a method and a communication device for determining random access signal opportunity RO, wherein the method comprises the following steps: the method comprises the steps that a terminal device receives a target first SSB, wherein the target first SSB is one of a plurality of first SSBs forwarded by a repeater, each first SSB comprises index indication information, the index indication information is used for indicating indexes of the first SSB, and a plurality of associated random access signal opportunities RO are determined according to the indexes of the first SSB and a first mapping relation; the terminal equipment determines a first identifier corresponding to a target first SSB, and determines a first RO set from a plurality of associated RO according to the first identifier corresponding to the target first SSB and a second mapping relation, wherein the first RO set comprises at least one RO; the terminal device transmits a random access signal on one RO included in the first RO set. The method provided by the application enables the repeater to receive the random access signal sent by the terminal equipment and forward the random access signal to the network equipment.

Description

Method and device for determining random access signal opportunity RO

Technical Field

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

Background

An intelligent repeater (SR), also called as a network control repeater (network controlled repeater, NCR), is a new node for improving network coverage, and the node has the characteristics of a radio frequency repeater (radio frequency repeater, RF repeater) in LTE (Long Term Evolution ), that is, has a repeater function of amplify-forward, and can amplify and forward a radio frequency signal of a network device to a terminal device, and amplify and forward a signal of the terminal device to the network device.

For the random access procedure of the terminal device, in the existing SR-free network, the terminal device will generally first determine a synchronization signal physical broadcast channel block (synchronization signal block, SSB) or SSB identity (SSB and SSB identity are not distinguished hereinafter), for example, by measuring the reference signal received power (Reference Signal Receiving Power, RSRP) of each SSB, selecting an SSB with an RSRP greater than a threshold value, the network device will configure a mapping relationship of random access signal (random access channel occasion, RACH) occasions (RACH occasin, RO) corresponding to the SSB, the terminal device will transmit a random access signal on any one RO corresponding to the SSB in the beam direction of receiving the SSB signal, and the network device will also receive a possible random access signal on the location corresponding to the RO in the beam direction of transmitting the SSB signal. When the channels have spatial beam direction consistency, in a downlink scenario, the terminal device can receive higher signal energy when the network device transmits signals in the beam direction of the SSB. In the 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 higher gain.

However, when the SR is configured in the network, since the terminal device still transmits the random access signal according to the direction of the receiving target SSB, and there is uncertainty in the SR receiving beam direction, a problem that the SR receiving beam direction and the terminal device transmitting beam direction are not matched may occur, so that the SR cannot receive the random access signal of the terminal device, and further cannot forward the random access signal of the terminal device to the network device, which results in random access failure of the terminal device.

Disclosure of Invention

The embodiment of the application provides a communication method and a communication device for determining a random access signal opportunity RO, which can enable a terminal device to send the RO of a random access signal to be aligned with the RO of a relay receiving the random access signal, and enable the relay to receive the random access signal of the terminal device by using a matched wave beam or a receiving parameter at the aligned RO, so that the relay can receive the random access signal sent by the terminal device with higher gain and cannot influence the pattern of a synchronous signal block SSB originally sent by network equipment.

In a first aspect, a communication method is provided, including: the method comprises the steps that a terminal device receives a target first synchronization signal physical broadcast channel block (SSB), wherein the target first SSB is one of a plurality of first SSBs forwarded by a repeater, each first SSB comprises index indication information, the index indication information is used for indicating indexes of the first SSB, and a plurality of associated random access signal opportunities (RO) are determined according to the indexes of the first SSB and a first mapping relation; the terminal equipment determines a first identifier corresponding to a target first SSB, and determines a first RO set from a plurality of associated RO according to the first identifier corresponding to the target first SSB and a second mapping relation, wherein the first RO set comprises at least one RO; the terminal device transmits a random access signal on one RO included in the first RO set.

According to the communication method provided by the embodiment of the invention, the RO of the random access signal sent by the terminal equipment and the RO of the random access signal received by the relay are aligned, and meanwhile, the relay receives the random access signal of the terminal equipment by using the matched wave beam or the receiving parameter at the aligned RO, so that the relay can receive the random access signal sent by the terminal equipment with higher gain, and the pattern of the synchronous signal block SSB originally sent by the network equipment is not influenced.

With reference to the first aspect, in some implementations of the first aspect, the determining, according to a first identifier and a second mapping relationship corresponding to the target first SSB, a first RO set from a plurality of associated ROs includes: and determining that the first RO set comprises M groups of RO from the plurality of associated RO, determining that an mth group of RO in the M groups of RO is the first RO set according to a first identifier corresponding to the target first SSB, wherein M is a positive integer, M is a positive integer smaller than or equal to M, and the M groups of RO are obtained by grouping the plurality of associated RO according to a second mapping relation.

With reference to the first aspect, in certain implementation manners of the first aspect, the determining, according to a factor of the first SSB and the first mapping relationship, a plurality of associated ROs includes: and determining time-frequency resource configuration information of a plurality of correlated ROs according to the index of the first SSB and the first mapping relation, wherein the time-frequency resource configuration information comprises parameters N and L,1/N represents the number of ROs associated with each SSB in each round of mapping of SSBs and ROs, L represents the number of ROs corresponding to each RO on the frequency domain.

With reference to the first aspect, in certain implementations of the first aspect, N, L and M satisfy the relationship:

k is a positive integer, and the second mapping relation is: the plurality of associated ROs include a plurality of rounds of mapped ROs, each round of mapped ROs including K x M ROs, each round of mapped (M-1) th x K x l+1 to mth x K x L ROs corresponding to the mth group of ROs.

With reference to the first aspect, in certain implementation manners of the first aspect, the second mapping relationship is: and the (j) th Association Period (AP) in the ith Association Pattern Period (APP) in the plurality of association ROs belongs to the (m) th group of ROs, wherein m=mod [ (i-1) ×A+j-1, M ], A is the number of APs included in one APP determined according to the first mapping relation, and A, i and j are positive integers.

With reference to the first aspect, in certain implementations of the first aspect, M is indicated by first indication information or M is determined by the terminal device by measuring a plurality of first SSBs, wherein the first indication information is associated with the target first SSB.

With reference to the first aspect, in certain implementations of the first aspect, m is indicated by second indication information or the m is determined by the terminal device by measuring the plurality of first SSBs and the target first SSB, wherein the second indication information is associated with the target first SSB.

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

With reference to the first aspect, in certain implementations of the first aspect, the terminal device receives a target first SSB, including: the terminal equipment receives a target first SSB by using a first airspace receiving parameter; the terminal device sends a random access signal on the RO comprised by the first RO set, comprising: and the terminal equipment transmits the random access signal on the RO included in the first RO set by using a first airspace transmission parameter, wherein the first airspace transmission parameter is the airspace transmission parameter corresponding to the first airspace reception parameter.

The first spatial transmission parameter may be a first transmission beam, and the first spatial reception parameter may be a first reception parameter.

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

In a second aspect, a communication method is provided, including: the method comprises the steps that a repeater receives and forwards a first synchronization signal physical broadcast channel block SSB according to first periods, the first SSB comprises index indication information, the index indication information is used for indicating indexes of the first SSB, in each first period, the repeater forwards the first SSB by using one of M airspace transmission parameters, wherein the airspace transmission parameter used in the xth first period is the same as the airspace transmission parameter used in the x+Mh first period, and M, x is a positive integer; the repeater determines a plurality of associated ROs according to the index of the first SSB and the first mapping relationship; the relay receives the random access signal by using a second airspace receiving parameter on a y-th group RO, wherein the y-th group RO is one group of M-group RO, the M-group RO is obtained by grouping a plurality of associated RO according to a second mapping relation, the second airspace receiving parameter is the airspace receiving parameter corresponding to the airspace transmitting parameter used for forwarding the first SSB in a y+C first period, 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 certain implementations of the second aspect, the determining, by the repeater, a plurality of associated ROs according to the index of the first SSB and the first mapping relationship includes: the repeater determines time-frequency resource configuration information of a plurality of correlated ROs according to the index of the first SSB and the first mapping relation, wherein the time-frequency resource configuration information includes parameters N and L,1/N represents the number of ROs associated with each SSB in each round of mapping of SSB and RO, L represents the number of ROs corresponding to each time unit with RO in the frequency domain.

With reference to the second aspect, in certain implementations of the second aspect, N, L and M satisfy the relationship:

wherein K is a positive integer, and the second mapping relationship is: the plurality of associated ROs include a plurality of rounds of mapped ROs, each round of mapped ROs including K x M ROs, each round of mapped ROs corresponding to a y-th set of ROs from (y-1) K x l+1 to y x K x L.

With reference to the second aspect, in some implementations of the second aspect, the second mapping relationship is: and the (j) th Association Period (AP) in the ith Association Pattern Period (APP) in the plurality of association ROs belongs to the (y) th group of ROs, wherein y=mod [ (i-1) ×A+j-1, M ], A is the number of APs included in one APP determined according to the first mapping relation, and A, i and j are positive integers.

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

In a fourth aspect, a communication method is provided, including: the terminal equipment receives the indication information or 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 measured value.

By the method provided by the embodiment of the application, the terminal equipment determines whether the repeater serves the network equipment or not between the terminal equipment and the network equipment, and further determines which method for determining the RO is used for determining the RO to send the random access signal.

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

With reference to the fourth aspect, in one possible implementation manner of the fourth aspect, the indication information may be location indication information that is sent by the network device to the terminal device when the terminal device is in a connected state, where the terminal device may determine whether the terminal device is served by the relay through the location indication information, where the location indication information is used to indicate a geographic location of the relay, for example, if a distance value between the geographic location of the terminal device and a geographic location of a certain relay is less than a second threshold, the terminal device may determine that the terminal device is served by the relay. The network device may carry the location indication information of the relay in the MIB or SIB.

With reference to the fourth aspect, in a possible implementation manner of the fourth aspect, the terminal device may determine whether the terminal device is served by the relay by measuring an RSRP value of a first SSB, where the first SSB is the same SSB that is sent in the same direction by the network device in different first periods, and if the terminal device is served by the relay, the first SSB is an SSB that can be received and forwarded by the relay. Determining whether the terminal device is served by the repeater by measuring the RSRP value of the first SSB may be understood as if the terminal device is served by the repeater, the first SSB is received by the repeater in a different first period and forwarded in a different direction, and thus the RSRP values of the first SSB measured by the terminal device in the different first periods may differ.

For example, if the variance or peak-to-average ratio of RSRP of the first SSB is greater than the third threshold value in the plurality of first periods, the terminal device may determine that the terminal device is served by the repeater.

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

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

In a fifth aspect, a communication device is provided, comprising means for performing the steps of the communication method of the first aspect and its implementations described above.

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

In another design, the communication device may be a communication apparatus (e.g., a terminal apparatus, etc.), and the communication chip may include a transmitter for transmitting information and a receiver for receiving information or data.

In a sixth aspect, a communication device is provided, comprising means for performing the steps of the communication method in the second aspect and its implementations described above.

In another design, the communication device may be a communication apparatus (e.g., a repeater, etc.), and the communication chip may include a transmitter for transmitting information and a receiver for receiving information or data.

A seventh aspect provides a communication device comprising means for performing the steps of the communication method of the third aspect and implementations thereof.

In another design, the communication device may be a communication apparatus (e.g., a network device, etc.), and the communication chip may include a transmitter for transmitting information and a receiver for receiving information or data.

In an eighth aspect, a communication apparatus is provided, comprising means for performing the steps of the communication method in the fourth aspect and its implementations.

In a ninth aspect, a communication device is provided, comprising a processor, a memory for storing a computer program, the processor being configured to invoke and run the computer program from the memory, such that the communication device performs the communication method in the first aspect and its implementations.

Optionally, the processor is one or more, and the memory is one or more.

Alternatively, the memory may be integrated with the processor or the memory may be separate from the processor.

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

In a tenth aspect, a communication device is provided, comprising a processor, a memory for storing a computer program, the processor being configured to invoke and run the computer program from the memory, such that the communication device performs the communication method in the second aspect and its implementations described above.

Optionally, the processor is one or more, and the memory is one or more.

In an eleventh aspect, a communication device is provided, including a processor, a memory for storing a computer program, the processor being configured to invoke and run the computer program from the memory, so that the communication device performs the communication method in the third aspect and its implementations.

Optionally, the processor is one or more, and the memory is one or more.

In a twelfth aspect, a communication device is provided, including a processor, a memory for storing a computer program, the processor being configured to invoke and run the computer program from the memory, so that the communication device performs the communication method in the fourth aspect and its implementations.

Optionally, the processor is one or more, and the memory is one or more.

In a thirteenth aspect, there is provided a computer program product comprising: a computer program (which may also be referred to as code, or instructions) which, when executed, causes a computer to perform the communication method of any of the above-described first to fourth aspects and implementations thereof.

In a fourteenth aspect, there is provided a communication system comprising: at least one apparatus for performing the method of the first aspect and its various implementations.

Optionally, the communication system further comprises at least one means for performing the method of the second aspect and its implementations.

Optionally, the communication system further comprises at least one means for performing the method of the third aspect and implementations thereof.

In a fifteenth aspect, a communication system is provided, the system comprising: at least one apparatus for performing the method of the second aspect and its implementations.

Optionally, the communication system further comprises at least one means for performing the method of the first aspect and its implementations.

In a sixteenth aspect, there is provided a communication system comprising: at least one apparatus for performing the method of the third aspect and implementations thereof.

In a seventeenth aspect, there is provided a chip system comprising a memory for storing a computer program and a processor for calling and running the computer program from the memory, such that a communication device in which the chip system is installed performs the communication method of any of the above aspects and implementations thereof.

The chip system may include an input circuit or interface for transmitting information or data, and an output circuit or interface for receiving information or data, among other things.

Drawings

Fig. 1 is a schematic diagram of a system architecture to which embodiments of the present application apply.

Fig. 2 is a schematic diagram of a network device according to an embodiment of the present application for periodically sending SSBs.

Fig. 3 is an exemplary schematic diagram of a round of mapping when N is less than 1 provided in an 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 an RO according to an embodiment of the present application.

Fig. 6 is a schematic diagram of a repeater provided in an embodiment of the present application to receive and forward a first SSB in a plurality of first periods.

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

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

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

Fig. 10 is a schematic diagram of another example of a method for determining an RO according to an embodiment of the present application.

Fig. 11 is a schematic diagram of a method 1000 in which a network device periodically transmits SSBs according to a second periodicity and a repeater periodically forwards SSBs according to the second periodicity.

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

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

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

Detailed Description

The technical solutions in the present application will be described below with reference to the accompanying drawings.

The technical solution of the embodiment of the application can be applied to various communication systems, for example: 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 telecommunications system (Universal Mobile Telecommunication System, UMTS), worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, wiMAX) telecommunications system, fifth generation (5th Generation,5G) system, or New Radio (NR), etc.

The terminal device in the embodiments of the present application may refer to a user device, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user apparatus. The terminal device may also be a cellular telephone, a cordless telephone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network or a terminal device in an evolved public land mobile network (Public Land Mobile Network, PLMN), etc., as the embodiments of the present application are not limited in this respect.

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

An intelligent repeater is described below.

The intelligent repeater SR is a new type of node for improving network coverage. On the one hand, the node has the characteristics of a radio frequency repeater in LTE, namely has a amplifying-forwarding relay function, and can amplify and forward radio frequency signals of network equipment to users and amplify and forward signals of terminal equipment to the network equipment. On the other hand, the intelligence of the SR is embodied in that the SR is provided with control information of the associated network equipment, so that parameters such as the receiving and transmitting beam direction, the transmitting power, the switching state of the SR node, the working bandwidth and the like can be dynamically adjusted according to real-time requirements, the SR can serve specific terminal equipment, and interference caused to other terminal equipment can be controlled.

Controlling the orientation of the transmit and receive beam of the SR is a very important feature at high frequencies, such as the millimeter wave band. In the high frequency band, the path loss of the signal in space is particularly large, and in order to overcome the large path loss, the transmitting device and/or the receiving device needs to transmit and/or receive the signal by adopting a beam forming method, that is, transmit and/or receive the signal in a specific beam direction. The beam may be a wide beam, or a narrow beam, or other type of beam. The technique of forming the beam may be a beam forming technique or other means of technique. The beamforming technique may be embodied as a digital beamforming technique, an analog beamforming technique, a hybrid digital/analog beamforming technique. The beams include a transmit beam and a receive beam. The transmit beam may refer to a distribution of signal intensities formed in spatially different directions after a signal is transmitted through an antenna, and the receive beam may refer to a distribution of signal intensities received by an antenna array in spatially different directions. One common implementation of beamforming is to set different amplitude gains and/or phase deviations on multiple transmit/receive antenna elements, which may be equivalent to forming a spatial filter, thereby enabling transmission and reception in a particular beam direction. The different beams may therefore be referred to or may correspond to different spatial (inter) parameters, spatial (inter) filters or spatial (inter) filter parameters; the different transmit beams may be referred to or may correspond to different spatial (inter) transmit parameters, spatial (inter) transmit filters, spatial (inter) transmit filter parameters; the different receive beams may be referred to as different spatial (inter) receive parameters, spatial (inter) receive filters, spatial (inter) receive filter parameters.

Therefore, when the network equipment can control the beam direction of the SR in real time, the beam of the SR can be dynamically adjusted according to the user needing to be scheduled, so that the signal-to-noise ratio of uplink and downlink signals of the scheduled terminal equipment is improved, and the reliability of the transmission rate is improved.

Fig. 1 is a schematic diagram of a system architecture to which embodiments of the present application apply. As shown in fig. 1, the embodiment of the application is mainly applied to a 5G system with a repeater or a 5G evolution system with a repeater. The network element related to the embodiment of the application comprises network equipment, a repeater and terminal equipment.

As shown in fig. 2, the network device periodically transmits a plurality of different SSBs in each first period, where each SSB may employ different spatial transmission parameters. In each first period, the network device sends pattern patterns of a plurality of SSB to be the same; in different first periods, the spatial domain transmission parameters adopted by the network equipment for transmitting the same SSB are the same.

The first period may be, for example, an SSB period as shown in fig. 2. The spatial domain transmission parameters may be the filter parameters described above, for example.

Each SSB includes index indication information, where the index indication information is used to indicate an index of the SSB, and the index of the SSB and the first mapping relationship are used to determine a plurality of associated ROs corresponding to the SSB. The SSB index is used to distinguish SSBs within one SSB period, and typically, different SSB indexes correspond to different SSBs using different transmit beams. For example, SSB1 and SSB2 shown in fig. 2 are SSBs with two transmit beams being different, SSB1 and SSB2 corresponding to different SSB indexes. It should be appreciated that different SSBs correspond to different indexes.

For example, the first mapping relationship may be a mapping relationship between the index of the SSB and the RO, that is, the first mapping relationship may be used to determine the RO corresponding to the index of the different SSB and transmitting the random access signal.

Illustratively, the index of the SSB and the time-frequency configuration information of the ROs associated with the SSB determined by the first mapping relationship are located in a system message block (system information block, SIB) associated with the SSB, where the time-frequency configuration information includes frequency domain location information and time domain location information of the ROs.

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 further include the number of ROs corresponding to each RO-containing time unit in the frequency domain. The frequency domain location information may also include a starting frequency location of the frequency domain RO, a frequency interval of the frequency domain RO, and the like.

Optionally, the time domain location information comprises a configuration period of the physical random access channel (physical random access channel, PRACH), which is typically in units of system frames, i.e. which indicates how many system frames each time a system frame comprising ROs will occur. The time domain location information may also include a time slot containing RO resources within each system frame containing ROs, 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 in certain locations may not be available, and an available or valid RO may need to meet certain conditions, e.g., the RO cannot contain downlink symbols, cannot overlap with symbols of SSB, etc. This is not described in detail in the embodiments of the present application.

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

The round of mapping when N is smaller than 1 will be exemplarily described with reference to fig. 3. Fig. 3 is an exemplary schematic diagram of a round of mapping when N is less than 1 provided in an embodiment of the present application.

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

In some embodiments, the terminal device may map the first SSB to a valid RO according to the index of the SSB and the time-frequency configuration information determined by the first mapping relationship. Alternatively, the terminal device may map SSBs to valid ROs in order of frequency mapping and time mapping.

Through the mapping of the SSB and the RO, the network equipment can align the beam direction of the received random access signal with the transmission beam direction of the transmitted SSB on the corresponding RO, so that the alignment of the transmission beam of the terminal equipment for transmitting the random access signal and the receiving beam of the network equipment for receiving the random access signal on the corresponding RO is realized.

Three cycles in the map are briefly described below with reference to fig. 4. Fig. 4 is a schematic diagram of three periods in the RO mapping relationship. As shown in fig. 4, one cycle is the PRACH configuration cycle described earlier, one cycle is the association cycle (association period, AP), and the other cycle is the association pattern cycle (association pattern period, APP).

As shown in fig. 4, one AP includes one or more PRACH configuration periods as described above, for example, 4 PRACH periods are included in AP1, and the PRACH period indicates how many system frames RO occur in the time domain. .

Illustratively, in one AP, all SSBs are associated with at least one valid RO. In different APs, there may be a case where the locations of the valid ROs are different (e.g., there is no SSB in some APs and there is an SSB in some APs), resulting in different patterns of the mapping relationship between SSB and valid RO in different APs, e.g., different patterns of SSB mapping in AP1 and AP 2.

For the reasons mentioned above, APP is defined. Wherein an APP comprises one or more APs. As shown in fig. 4, in each APP, the pattern of the mapping relationship between the SSB and the valid RO is the same, or the pattern of the mapping relationship between the SSB and the valid RO is repeated with the APP as a cycle. Fig. 5 is an example of a method for determining a random access signal timing RO according to an embodiment of the present application, in this method 500, a network device periodically sends SSBs according to the method shown in fig. 2, as shown in fig. 5, and this method 500 includes:

s510, the repeater receives and forwards the first SSB according to the first period. Accordingly, the network device may receive or forward multiple SSBs per first period.

Alternatively, the first period may be one SSB period.

Alternatively, the repeater may be a radio frequency repeater, a smart 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 a function of signal forwarding and the like.

The corresponding spatial transmission parameters or SSBs of the transmission beam towards the relay can be received and forwarded by the relay.

It should be noted that the spatial domain reception parameters of SSB received by the repeater may also be fixed, and alternatively, the spatial domain reception parameters are determined by the beam training process.

In the embodiment of the present application, it is assumed that one of SSBs that can be received by a repeater is a first SSB, and a description will be given below taking the first SSB as an example.

Illustratively, during each first period, the first SSB is received by the repeater, which may forward the first SSB using one of the M spatial transmission parameters.

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

It should be noted that, other rules may be used to determine the airspace transmission parameter for forwarding the first SSB in each first period, which is not limited in the embodiment of the present application. In other words, it can be understood that M first periods are one large period, and the repeater forwards the first SSB using one of M different spatial domain transmission parameters in each first period in one large period, and repeats the above procedure from the next large period.

Optionally, the M is related to a relative positional relationship of the network device and the repeater. Alternatively, 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 to the repeater or the M may be determined by the repeater itself and then reported to the network device.

Fig. 6 is a schematic diagram of a repeater receiving and forwarding a first SSB over a plurality of first periods. As shown in fig. 6, for example, assuming that M is 2, 2 first periods (i.e., SSB periods) are one large period. The first SSB in fig. 6 corresponds to SSB1, i.e., SSB received by the repeater. The repeater forwards the first SSB, SSB1, to the beam direction of SSB1-1 in the first period shown in fig. 6, the repeater forwards the first SSB, SSB1, to the beam direction of SSB1-2 in the second first period shown in fig. 6, the repeater forwards the first SSB, SSB1, to the beam direction of SSB1-1 in the third first period shown in fig. 6, the repeater forwards the first SSB, SSB1, to the beam direction of SSB1-2 in the fourth first period shown in fig. 6, and so on.

It should be noted that, the relay forwarding the first SSB according to the first periodic poll is only one form of forwarding the first SSB by the relay, and the relay may also forward the first SSB according to other rules.

It should be noted that the first SSB forwarded by the repeater using different spatial transmission parameters or transmission beams may not be received by the terminal device. Alternatively, some of the first SSBs forwarded by the repeater using different spatial transmission parameters or transmission beams may be received by the terminal device with a stronger RSRP and some of the first SSBs may be received by the terminal device with a weaker RSRP.

It should be noted that the repeater may forward multiple different SSBs in a first period. Optionally, a first SSB is included. In other words, it is possible that a plurality of different SSBs transmitted by the network device during the first period can be received by the repeater, which can forward the plurality of different SSBs. When a repeater forwards a plurality of different SSBs, the embodiments of the present application may be applied to a plurality of different SSBs for a single SSB-related step, without affecting the essence of the embodiments of the present application, which are not described herein.

S520, the repeater determines a plurality of 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 the plurality of associated ROs corresponding to SSBs shown in fig. 2, and reference may be made to the previous description, which is not repeated herein.

And S530, the repeater receives the random access signal by using a second airspace receiving parameter on a y-th group RO, wherein the y-th group RO belongs to an M-group RO, and the M-group RO is obtained by grouping a plurality of associated RO according to a second mapping relation.

Illustratively, the y may be any integer from 1 to M. In other words, the relay receives the random access signal using the corresponding second spatial domain reception parameter on one or more of the 1 st to M-th ROs, or the relay directs the reception beam in the corresponding direction on one or more of the 1 st to M-th ROs.

It should be understood that the second spatial reception parameter used by the repeater on the y-th set of ROs is a spatial reception parameter corresponding to the spatial transmission parameter used to forward the first SSB in the y+c-th first period. Wherein C is an integer greater than or equal to 0, and y is a positive integer less than or equal to M.

Next, description will be made on how the repeater divides the plurality of associated ROs into M groups of ROs according to the second mapping relationship.

Alternatively, the parameters N, L referred to in fig. 2 and M described above may satisfy the relation:

wherein K is a positive integer.

The second mapping relationship may be: the plurality of associated ROs for the first SSB include a plurality of rounds of mapped ROs, each round of mapped ROs including k×m ROs, and each round of mapped ROs corresponds to a y-th set of ROs from (y-1) kl+1 to (y×k×l).

Wherein each round of mapping is one of a plurality of rounds of mapping, and each round of mapping in the plurality of rounds of mapping has the same meaning as the one round of mapping.

Fig. 7 is a schematic diagram of an example of the second mapping relation. As shown in fig. 7, l=4, 1/n= 8,K =1, m=2. At this time, the number of frequency domain ROs is 4, and each SSB maps 8 ROs in one round of mapping, that is, ROs occupying two time units, and at this time, the first second spatial reception parameter of the repeater may correspond to 4 ROs in the first time unit, and the second spatial reception parameter of the repeater may correspond to 4 ROs in the second time unit. In other words, the repeater adjusts the parameters of the received beam to the first and second spatial domain reception parameters on the 4 ROs corresponding to the first time unit, and the repeater adjusts the parameters of the received beam to the second and second spatial domain reception parameters on the 4 ROs corresponding to the second time unit.

Optionally, the second mapping relationship may be: among the plurality of associated ROs corresponding to the first SSB, the RO included in the y-th AP of the M APs is a y-th group RO. 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. B is a positive integer.

Fig. 8 is a schematic diagram showing another example of the second mapping relation. Optionally, the second mapping relationship may be: among the plurality of associated ROs corresponding to the first SSB, ROs included in the y+djm th AP in each APP belong to the y-th group RO, or ROs included in the d+yjd th AP in each APP belong to the y-th group RO. Wherein a=d×m, and a is the number of APs included in one APP determined according to the first mapping relationship. A. D is a positive integer.

Fig. 9 is a schematic diagram showing another example of the second mapping relation. Optionally, the second mapping relationship may be: an RO included in a j-th AP among the i-th APPs in the plurality of associated ROs corresponding to the first SSB belongs to a y-th group RO. Wherein y may be mod [ (i-1) a+j-1, m ], and a is the number of APs included in one APP determined according to the first mapping relationship. A, i and j are positive integers.

It should be noted that, according to the second mapping relationship, the repeater may determine the 1 st to mth group ROs from the plurality of associated ROs corresponding to the first SSB, and each of the group ROs corresponds to M second spatial domain reception parameters.

Alternatively, the repeater may align the parameters of the receive beam over the corresponding second spatial reception parameters over one or more of the M sets of ROs.

It should be appreciated that the relay may receive a random access signal in a certain group RO of the M-group ROs.

S540, the terminal equipment receives the target first SSB, and determines a plurality of associated RO according to the index of the first SSB and the first mapping relation.

The target first SSB may be, for example, the first SSB having the strongest RSRP received by the terminal device, or may be the first SSB having 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 first SSBs forwarded by the repeater in the first periods.

The terminal device may determine a plurality of associated ROs according to the index of the first SSB and the first mapping relationship. The method for determining the plurality of associated ROs by the terminal device according to the index of the first SSB and the first mapping relationship is similar to the method shown in fig. 2 and may refer to the method shown in fig. 2, which is not described herein.

S550, the terminal equipment determines a first identifier corresponding to the target first SSB, and determines a first RO set from a plurality of associated RO according to the first identifier corresponding to the target first SSB and the second mapping relation.

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 repeater.

For example, the terminal device determines 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, and may determine, for the terminal device, that an mth group RO in the M group ROs is the first RO set according to the first identifier corresponding to the target first SSB.

Wherein M is a positive integer less than or equal to M. The M groups of ROs are grouped for the plurality of associated ROs according to the second mapping.

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

Specifically, the first indication information is associated with the target first SSB. Alternatively, the first indication information may be located in a payload of the target first SSB, or may be located in a MIB in the target first SSB. Optionally, the first indication information may be located in a SIB, and the SIB and the first SSB association may be understood as a physical downlink control channel (Physical Downlink Control Channel, PDCCH)/downlink control information (Downlink Control Information, DCI) on a resource set (CORESET) and/or a Search Space (Search Space) indicated by the MIB in the target first SSB scheduling the SIB.

Alternatively, the terminal device may determine M by measuring the target first SSB. For example, the terminal device may measure an RSRP time sequence of the plurality of first SSBs, extract a period of RSRP change from the time sequence, and further determine M.

Alternatively, the terminal device may determine M through other indication information of the network device. The indication information is sent by the network device to the terminal device when the terminal device is in a connection state.

The terminal device also needs to determine a first identifier corresponding to the target first SSB. I.e. m. Optionally, the terminal device may determine the first identifier corresponding to the target first SSB by measuring the target first SSB.

Illustratively, the terminal device may determine the first identifier corresponding to the target first SSB by measuring a 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 the RSRP of the target first SSB detected in the system frame SFN is greater than or equal to the first identifier), it may be determined that the target first SSB corresponds to the first identifier as:

wherein T is _frame Indicating a frame length, typically 10ms in an NR system, but also other values, half_frame being a field indication, which may be equal to 0 or 1, indicating that the target first SSB is located in the first or second half of a frame (frame length 10 ms), T _SSB Representing the period of SSB. The mod function means that the first number in parentheses is divided by the second number in parentheses to obtain 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, alternatively, the second indication information may be located in the payload indication information of the target first SSBFor example in payload of SSB in NR R16

For the reserved bits, the second indication information may be located in the reserved bits, or may be located in other newly set bits, which is not limited in this embodiment of the present application. Alternatively, the second indication information may be located in 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. For example, when the terminal device is in a connected state, the network device may send indication information to the terminal device, indicating a first identifier corresponding to the target first SSB.

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

It should be noted that, the second mapping relationship is similar to the description in step S530, and in this step, only the mth group RO needs to be determined, which is not described herein.

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

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

Optionally, the terminal device may determine whether the terminal device is served by the relay through the location indication information of the relay sent by the network device, for example, if a distance value between the geographic location of the terminal device and the geographic location of a certain relay is smaller than a second threshold, the terminal device may determine that the terminal device is served by the relay. The network device may carry the location indication information of the relay in the MIB or SIB.

Alternatively, the terminal device may determine whether to be served by the repeater by measuring the RSRP value of the first SSB.

For another example, in a plurality of first periods, the terminal device may determine that the terminal device is served by the repeater by normalizing the fast fourier transform (fast fourier transform, FFT) sequence of the RSRP of the first SSB to have a non-zero frequency component greater than a fifth threshold.

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

Optionally, the terminal device sends the random access signal by using a first airspace sending parameter, where the first airspace sending parameter is an airspace sending parameter corresponding to a first airspace receiving parameter, and the first airspace receiving parameter is an airspace receiving parameter of the terminal device receiving the target first SSB.

It should be appreciated that the first spatial domain transmission parameter may be the same as the first spatial domain reception parameter. The first spatial domain transmission parameter may be similar to the first spatial domain reception parameter.

Alternatively, the terminal device may send the random access signal by using a first sending beam, where the first sending beam is a sending beam corresponding to a first receiving beam, and the first receiving beam is a receiving beam of the terminal device receiving the target first SSB.

It should be understood that the first transmit beam and the first receive beam may be beams of similar parameters, which may be understood as, for example, the first transmit beam being a coarse beam, the first receive beam being a fine beam, the coarse beam comprising a fine beam, etc.

It should be understood that the first transmit beam and the first receive beam may also be beams of the same parameters.

Note that the order of step S520 to step S560 may not be fixed.

The method provided by the embodiment of the invention can align the RO of the terminal equipment sending the random access signal with the RO of the relay receiving the random access signal, and simultaneously enable the relay to receive the random access signal of the terminal equipment by using the matched wave beam at the aligned RO, so that the relay can receive the random access signal sent by the terminal equipment with higher gain and the pattern of the SSB originally sent by the network equipment is not influenced.

Fig. 10 is a schematic diagram of another example of a method for determining an RO according to an embodiment of the present application. In the method provided in fig. 10, the pattern of SSB transmission of the network device as introduced in fig. 2 is changed, and as shown in fig. 10, the method 1000 includes:

s1010, the network device sends multiple groups of SSB according to the second period.

It will be appreciated that the meaning of this second period is the same as the second period described above. Reference may be made to the above description and will not be repeated here.

Fig. 11 is a schematic diagram of a method 1000 in which a network device periodically transmits SSBs according to a second period and a repeater periodically forwards SSBs according to the second period. As shown in fig. 11, the network device sends multiple SSBs on each second period, where each SSB includes Z SSBs, and the spatial transmission parameters corresponding to each SSB 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.

Illustratively, as shown in fig. 11, the network device sends two sets of SSBs, where Z has a value of 2, i.e., 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 the meaning of Z in the method 1000 may refer to the meaning of M, the meaning of index, the meaning of spatial domain transmission parameter, etc. may refer to the foregoing description, and are not repeated herein.

S1020, the repeater receives and forwards a set of SSBs according to the second period.

It should be appreciated that the repeater receives one of the SSBs during each second period and forwards multiple SSBs included in the one SSB using different spatial transmission parameters during each second period.

Illustratively, as shown in fig. 11, the repeater receives SSB3 and SSB4, and forwards SSB3 and SSB4 using 2 spatial transmission parameters, respectively.

S1030, the terminal equipment receives the second SSB, and determines a plurality of associated RO according to the index of the second SSB and the first mapping relation.

The second SSB may be, for example, the SSB with the strongest RSRP received by the terminal device, or may be an SSB with the RSRP received by the terminal device exceeding the first threshold.

The method for determining the plurality of associated ROs by the terminal device according to the index of the second SSB and the first mapping relationship is similar to the method for determining the plurality of associated ROs by the terminal device according to the index of the first SSB and the first mapping relationship, and will not be described herein.

S1040, the terminal device transmits a random access signal on an RO among the plurality of associated ROs.

The spatial domain transmission parameters used by the terminal device to transmit the random access signal may refer to the description in S560, which is not described herein.

S1050, the repeater determines the forwarded RO associated with each SSB according to the index of the SSB and the first mapping relation, and receives the random access signal on each RO associated with the SSB respectively.

It should be noted that, the description of the spatial domain reception parameters adopted by the relay to receive the random access signal may refer to step S530, which is not described herein. Namely, receiving the random access signal corresponding to each SSB by adopting the space domain receiving parameter corresponding to the space domain transmitting parameter of each SSB.

The order of step S1040 and step S1050 may not be fixed.

According to the method provided by the embodiment of the application, by changing the pattern of the SSB sent by the network equipment, the relay can receive the random access signal of the terminal equipment by using the matched wave beam at the aligned RO by utilizing the index of the SSB and the first mapping relation, so that the relay can receive the random access signal sent by the terminal equipment with higher gain

Fig. 12 shows an example of a communication device according to an embodiment of the present application, and as shown in fig. 12, the communication device 1200 includes a transceiver unit 1210 and a processing unit 1220.

In some embodiments, the communications apparatus 1200 can be configured to implement the functionality of a terminal device involved in any of the methods described above. For example, the communication apparatus 1200 may correspond to a terminal device.

The communication apparatus 1200 may be a terminal device and perform the steps performed by the terminal device in the above-described method embodiment. The transceiver unit 1210 may be configured to support communication by the communication apparatus 1200, for example, to perform the sending and/or receiving actions performed by the terminal device in the above-described method embodiment, and the processing unit 1220 may be configured to support the communication apparatus 1200 to perform the processing actions in the above-described method embodiment, for example, to perform the processing actions performed by the terminal device in the above-described method embodiment.

Optionally, the communication device may further comprise a storage unit 1230 (not shown in fig. 10) for storing program code and data of the communication device.

In particular, reference may be made to the following description:

the transceiver unit 1210: for receiving a target first synchronization signal block SSB, the target first SSB being one of a plurality of first SSBs forwarded by a repeater, each first SSB containing index indication information for indicating an index of the first SSB.

Processing unit 1220: for determining a plurality of associated random access signal occasions RO based on the index of the first SSB and the first mapping relation.

The processing unit 1220 is further configured to determine an identifier corresponding to the target first SSB, determine 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, where the first RO set includes at least one RO.

The transceiving unit 1210 is further configured to transmit a random access signal on one RO included in the first RO set.

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

The processing unit 1220 is further configured to determine a plurality of associated ROs based on the index of the first SSB and the first mapping, including: the processing unit is configured to determine time-frequency resource configuration information of a 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,1/N indicates the number of ROs associated with each SSB in each round of mapping of SSB and RO, L indicates the number of ROs corresponding to each time unit with RO in the frequency domain.

Alternatively, N, L and M satisfy the relationship:

Optionally, the second mapping relationship is: and the (j) th Association Period (AP) in the ith Association Pattern Period (APP) in the plurality of association ROs belongs to the (m) th group of ROs, wherein m=mod [ (i-1) ×A+j-1, M ], A is the number of APs included in one APP determined according to the first mapping relation, and A, i and j are positive integers.

Alternatively, M is indicated by the first indication information, or M is determined by the processing unit 1220 by measuring a plurality of first SSBs, wherein the first indication information is associated with the target first SSB.

Alternatively, m is indicated by the second indication information, or m is determined by the processing unit 1220 by measuring a plurality of first SSBs and the target first SSB, wherein 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 the repeater according to third indication information, where the third indication information is used to indicate that the communication device is served by the repeater, or the processing unit 1220 determines that the communication device is served by the repeater by measuring the plurality of first SSBs.

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

the transceiver unit 1210 is configured to receive a target first SSB using a first spatial domain reception parameter.

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

the transceiver 1210 is configured to transmit a random access signal on an RO included in the first RO set using a first spatial transmission parameter, where the first spatial transmission parameter is a spatial transmission parameter corresponding to the first spatial reception parameter.

In some embodiments, the communications apparatus 1200 may be configured to implement the functionality of a repeater involved in any of the methods described above. For example, the communication device 1200 may correspond to a repeater.

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

Optionally, the communication device may further comprise a storage unit 1230 (not shown in fig. 12) for storing program code and data of the communication device.

In particular, reference may be made to the following description:

the transceiver unit 1210: the first SSB is configured to receive and forward the first SSB according to first periods, where the first SSB includes index indication information, where the index indication information is used to indicate an index of the first SSB, and in each first period, the repeater forwards the first SSB using one of M spatial transmission parameters, where the spatial transmission parameter used in an xth first period is the same as the spatial transmission parameter used in an xth+mth first period, and M and x are positive integers.

Processing unit 1220: for determining a plurality of associated ROs based on the index of the first SSB and the first mapping.

The transceiver 1010 is further configured to receive a random access signal using a second spatial reception parameter on a y-th group of ROs, where the y-th group of ROs is one of M groups of ROs, where the M groups of ROs are obtained by grouping a plurality of associated ROs according to a second mapping relationship, the second spatial reception parameter is a spatial reception parameter corresponding to a spatial transmission parameter used for forwarding the first SSB in a y+c first period, where C is an integer greater than or equal to zero, and y is a positive integer less than or equal to M.

Alternatively, N, L and M satisfy the relationship:

Optionally, the second mapping relationship is: and the (j) th Association Period (AP) in the ith Association Pattern Period (APP) in the plurality of association ROs belongs to the (y) th group of ROs, wherein y=mod [ (i-1) ×A+j-1, M ], A is the number of APs included in one APP determined according to the first mapping relation, and A, i and j are positive integers.

Fig. 13 is an example of a signal transmission apparatus 1300 according to an embodiment of the present application. As shown in fig. 13, the apparatus 1300 includes: a transceiver 1310, a processor 1320, and a memory 1330. The memory 1330 is used for storing instructions. The processor 1320 is coupled to the memory 1330 for executing instructions stored in the memory to perform the methods provided by the embodiments of the present application described above.

In particular, the transceiver 1310 in the apparatus 1300 may correspond to the transceiver unit 1210 in the apparatus 1200, and the processor 1320 in the communication apparatus 1300 may correspond to the processing unit 1220 in the communication apparatus 1200.

It should be appreciated that the memory 1330 and the processor 1320 may be combined into one processing device, and the processor 1320 is configured to execute the program codes stored in the memory 1330 to implement the functions described above. In particular, the memory 1330 may also be integrated into the processor 1320 or separate from the processor 1310.

Fig. 14 is a schematic diagram of still another example of the communication apparatus according to the embodiment of the present application. The communication apparatus may be used to perform the method performed by the above-described repeater or terminal device, as shown in fig. 14, and includes:

at least one Input interface (Input (s)) 1410, logic circuit 1420, and at least one Output interface (Output (s)) 1430. Alternatively, the logic circuit may be a chip, or other integrated circuits that may implement the methods of the present application.

The input interface 1410 is used to input or receive data; output interface 1430 is used to output or transmit data; logic 1420 is configured to perform the various possible methods described above with respect to fig. 5.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may 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 in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method for determining a random access signal timing RO, comprising:

the method comprises the steps that terminal equipment receives a target first synchronization signal physical broadcast channel block (SSB), wherein the target first SSB is one of a plurality of first SSBs forwarded by a repeater, each first SSB comprises index indication information, the index indication information is used for indicating indexes of the first SSB, and a plurality of associated random access signal opportunities (RO) are determined according to the indexes of the first SSB and a first mapping relation;

the terminal equipment determines a first identifier corresponding to the target first SSB, and determines a first RO set from the plurality of associated RO according to the first identifier corresponding to the target first SSB and a second mapping relation, wherein the first RO set comprises at least one RO;

the terminal device transmits a random access signal on one RO included in the first RO set.

2. The method of claim 1, wherein the determining a first set of ROs from the plurality of associated ROs according to the first identifier and the second mapping corresponding to the target first SSB comprises:

determining that the first RO set comprises M groups of RO from the plurality of associated RO, determining that an mth group of RO in the M groups of RO is the first RO set according to a first identifier corresponding to the target first SSB, wherein M is a positive integer, M is a positive integer smaller than or equal to M, and the M groups of RO are obtained by grouping the plurality of associated RO according to the second mapping relation.

3. The method according to claim 1 or 2, wherein said determining a plurality of associated ROs from the index of the first SSB and the first mapping relation comprises:

and determining time-frequency resource configuration information of the plurality of correlated ROs according to the index of the first SSB and the first mapping relation, wherein the time-frequency resource configuration information comprises parameters N and L, 1/N represents the number of ROs associated with each SSB in each round of mapping of SSBs and ROs, and L represents the number of ROs corresponding to each RO on the frequency domain on each time unit with ROs.

4. A method according to claim 3, wherein N, L and M satisfy the relationship:

The K is a positive integer, and the second mapping relation is: the plurality of associated ROs include a plurality of rounds of mapped ROs, each round of mapped ROs including k×m ROs, and each round of mapped (M-1) th×k+1 to mth×k×l ROs corresponding to the mth group of ROs.

5. A method according to claim 3, wherein the second mapping relationship is: and the RO included in the j-th association period AP in the i-th association pattern period APP in the plurality of 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 one APP determined according to the first mapping relationship, and a, i, j are positive integers.

6. The method according to any of claims 2 to 5, wherein the M is indicated by a first indication information or the M is determined by the terminal device by measuring the plurality of first SSBs, wherein the first indication information is associated with the target first SSB.

7. The method according to any of claims 2 to 6, wherein the m is indicated by second indication information or determined by the terminal device by measuring the plurality of first SSBs and the target first SSB, wherein the second indication information is associated with the target first SSB.

8. The method according to any one of claims 1 to 7, further comprising:

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

the terminal device determines that the terminal device is served by the repeater by measuring the plurality of first SSBs.

9. The method according to any of claims 1 to 8, wherein the terminal device receives a target first SSB, comprising:

the terminal equipment receives the target first SSB by using a first airspace receiving parameter;

the terminal device sending a random access signal on the RO comprised by the first RO set, comprising:

and the terminal equipment transmits the random access signal by using a first airspace transmission parameter on the RO included in the first RO set, wherein the first airspace transmission parameter is the airspace transmission parameter corresponding to the first airspace reception parameter.

10. A method for determining a random access signal timing RO, comprising:

the method comprises the steps that a repeater receives and forwards a first synchronous signal physical broadcast channel block SSB according to first periods, the first SSB comprises index indication information, the index indication information is used for indicating indexes of the first SSB, in each first period, the repeater forwards the first SSB by using one airspace transmission parameter in M airspace transmission parameters, wherein the airspace transmission parameters used in the xth first period are the same as the airspace transmission parameters used in the x+Mth first period, and the x is a positive integer;

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

the relay receives a random access signal by using a second airspace receiving parameter on a y-th group of RO, wherein the y-th group of RO is one group of M groups of RO, the M groups of RO are obtained by grouping the plurality of associated RO according to the second mapping relation, the second airspace receiving parameter is an airspace receiving parameter corresponding to an airspace transmitting parameter used for forwarding the first SSB in a y+C first period, C is an integer greater than or equal to zero, and y is a positive integer less than or equal to M.

11. The method of claim 10, wherein the repeater determining a plurality of associated ROs based on the index of the first SSB and a first mapping relationship comprises:

the repeater determines time-frequency resource configuration information of the plurality of correlated ROs according to the index of the first SSB and the first mapping relation, where the time-frequency resource configuration information includes parameters N and L, 1/N represents the number of ROs associated with each SSB in each round of mapping of SSBs and ROs, and L represents the number of ROs corresponding to each time unit with ROs in the frequency domain.

12. The method according to claim 10 or 11, wherein N, L and M satisfy the relationship:

The K is a positive integer, and the second mapping relation is: the plurality of associated ROs include a plurality of rounds of mapped ROs, each round of mapped ROs including k×m ROs, and each round of mapped ROs having (y-1) th×k+1 to y×k×l-th ROs corresponding to the y-th group RO.

13. The method according to claim 10 or 11, wherein the second mapping relationship is: and the RO included in the j-th association period AP in the i-th association pattern period APP in the plurality of 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 one APP determined according to the first mapping relationship, and a, i, j are positive integers.

14. A communication apparatus for determining a random access signal timing RO, comprising:

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

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

15. The communication device of claim 14, wherein the processing unit configured to determine a first set of ROs from the plurality of associated ROs based on the first identifier and the second mapping corresponding to the target first SSB comprises:

the processing unit is configured to determine that the first RO set includes M groups of ROs from the plurality of associated ROs, determine, according to a first identifier corresponding to the target first SSB, that an mth group of ROs in the M groups of ROs is the first RO set, where M is a positive integer, and M is a positive integer less than or equal to M, and the M groups of ROs are obtained by grouping the plurality of associated ROs according to the second mapping relationship.

16. The communication apparatus according to claim 14 or 15, wherein the processing unit is configured to determine a plurality of 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 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, 1/N indicates the number of ROs associated with each SSB in each round of mapping of SSBs and ROs, and L indicates the number of ROs corresponding to each RO on a frequency domain.

17. A communication device according to claim 16, whereinIn that said N, said L and said M satisfy the relation:

18. The communication apparatus according to claim 16, wherein the second mapping relationship is: and the RO included in the j-th association period AP in the i-th association pattern period APP in the plurality of 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 one APP determined according to the first mapping relationship, and a, i, j are positive integers.

19. The communication apparatus according to any of claims 15 to 18, wherein the M is indicated by a 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.

20. The communication apparatus according to any of claims 15 to 19, wherein the m is indicated by second indication information or determined by the processing unit by measuring the plurality of first SSBs and the target first SSB, wherein the second indication information is associated with the target first SSB.

21. 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 repeater based on third indication information indicating that the communication device is served by the repeater, or,

determining that the communication device is served by the repeater by measuring the plurality of first SSBs.

22. The communication device according to any one of claims 14 to 21, wherein,

the transceiver unit is configured to receive a target first SSB, and includes:

the receiving and transmitting unit is used for receiving the target first SSB by using a first airspace receiving parameter;

the transceiver unit is configured to send a random access signal on an RO included in the first RO set, and includes:

the receiving and transmitting unit is configured to transmit the random access signal using a first spatial transmission parameter on an RO included in the first RO set, where the first spatial transmission parameter is a spatial transmission parameter corresponding to the first spatial reception parameter.

23. A communication apparatus for determining a random access signal timing RO, comprising:

a transceiver unit, configured to receive and forward a first synchronization signal physical broadcast channel block SSB according to a first period, where the first SSB includes index indication information, where the index indication information is used to indicate an index of the first SSB, and in each first period, the repeater forwards the first SSB using one of M spatial transmission parameters, where a spatial transmission parameter used in an xth first period is the same as a spatial transmission parameter used in an xth+mth first period, and x is a positive integer;

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

the receiving and transmitting unit is further configured to receive a random access signal by using a second spatial reception parameter on a y-th group of ROs, where the y-th group of ROs is one of M groups of ROs, where the M groups of ROs are obtained by grouping the plurality of associated ROs according to the second mapping relationship, the second spatial reception parameter is a spatial reception parameter corresponding to a spatial transmission parameter used for forwarding the first SSB in a y+c first period, and C is an integer greater than or equal to zero, and y is a positive integer less than or equal to M.

24. The communication apparatus of claim 23, wherein the processing unit configured to determine a plurality of associated ROs based on the index of the first SSB and a first mapping relationship comprises:

25. The communication apparatus according to claim 23 or 24, wherein the N, the L and the M satisfy the relationship:

26. The communication apparatus according to claim 23 or 24, wherein the second mapping relationship is: and the RO included in the j-th association period AP in the i-th association pattern period APP in the plurality of 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 one APP determined according to the first mapping relationship, and a, i, j are positive integers.

27. A communication device comprising at least one processor coupled to a memory:

the memory is used for storing program instructions and data;

the processor being configured to execute instructions in the memory to implement the method of any one of claims 1 to 9 or claims 10 to 13.

28. A communication device comprising logic circuitry and an input-output interface:

the input/output interface is used for inputting or outputting data or information;

the logic circuit is to perform the method of any one of claims 1 to 9 or 10 to 13 in accordance with the data or information.

29. A computer readable storage medium having stored thereon computer instructions which, when run on a computer, cause the computer to perform the method of any of claims 1 to 13.

30. A computer program product comprising instructions which, when run on a computer, cause the method of any one of claims 1 to 9 to be performed or cause the method of any one of claims 10 to 13 to be performed.