WO2023160677A1

WO2023160677A1 - Communication method and apparatus thereof

Info

Publication number: WO2023160677A1
Application number: PCT/CN2023/078295
Authority: WO
Inventors: 杨苑青; 雷珍珠; 周欢
Original assignee: 展讯半导体(南京)有限公司
Priority date: 2022-02-28
Filing date: 2023-02-25
Publication date: 2023-08-31
Also published as: CN116709564A

Abstract

The present application belongs to the technical field of communications. Disclosed are a communication method and an apparatus thereof. The method comprises: a terminal device respectively sending a random access request on at least two random access channel occasions (RO); and on a beam associated with a first synchronization signal block (SSB), receiving a random access response, the first SSB being one of SSBs associated with the at least two ROs. In this way, the terminal device can determine to receive the random access response on the beam associated with the first SSB, which helps to improve the success rate of random access.

Description

A communication method and device thereof

technical field

The present application relates to the technical field of communication, and in particular to a communication method and device thereof.

Background technique

The terminal device initiates a random access request through a physical random access channel (Physical Random Access Channel, PRACH). If the RAR from the network device is not received before the random access response (Random Access Response, RAR) time window ends, or the random access request is not received by the network device due to too low transmission power of the random access request, or other reasons If it is successfully detected, it is considered that the random access has failed, and the terminal device needs to send a random access request again to perform random access, which affects the performance of the terminal device.

If the terminal device sends at least two random access requests through different beams before the RAR time window ends, the probability that the network device successfully receives the random access request can be increased. However, when the terminal device sends at least two random access requests, the terminal device cannot determine which beam the network device sends the random access response through, and also cannot determine which beam the network device receives the random access response through, so the terminal device may not be able to Received a random access response, resulting in random access failure.

Contents of the invention

The present application discloses a communication method and a device thereof. A terminal device can determine to receive a random access response on a beam associated with the first SSB, which is beneficial to improving the success rate of random access.

In the first aspect, the embodiment of the present application provides a communication method, the method includes: a terminal device sends a random access request to a network device on at least two ROs; In the random access response of the network device, the first SSB is one of the SSBs associated with the at least two ROs.

In an optional implementation manner, the first SSB is associated with the ith RO of the at least two ROs, where i is a positive integer greater than or equal to 1.

In an optional implementation manner, the method may further include: the terminal device receiving first indication information from the network device, where the first indication information is used to indicate i.

In an optional implementation manner, the method may further include: the terminal device sending second indication information to the network device, where the second indication information is used to indicate i.

In an optional implementation manner, the terminal device receives the random access response from the network device on the beam associated with the first SSB. The beam associated with the SSB receives a random access response from the network device, wherein the first RA-RNTI is determined according to the time-frequency resource position of the i-th RO.

In an optional implementation manner, the signal strength of the first SSB is the largest among the SSBs associated with the at least two ROs.

In an optional implementation manner, the method may further include: the terminal device receiving third indication information from the network device, where the third indication information is used to indicate the first SSB.

In an optional implementation manner, the terminal device receives third indication information from the network device. A specific implementation manner is: the terminal device receives DCI from the network device, where the DCI includes the third indication information.

In an optional implementation manner, the third indication information occupies n or bits; wherein, n is the total number of SSBs associated with the above-mentioned at least two ROs, or, n is the total number of SSBs in the serving cell of the terminal device, or, n is the number of SSBs actually used by the serving cell of the terminal device The total number of SSBs.

In an optional implementation manner, the terminal device receives the random access response from the network device on the beam associated with the first SSB. The random access response from the network device is received on the beam associated with the SSB; wherein, the first RA-RNTI is determined according to the time-frequency resource positions of the above-mentioned at least two ROs, or the first RA-RNTI is determined according to the above-mentioned at least two The time-frequency resource position of an RO in the RO is determined.

In the second aspect, the embodiment of the present application provides another communication method, the method includes: the network device respectively receives random access requests from the terminal device on at least two ROs; and on the beam associated with the first SSB Sending a random access response to the terminal device, where the first SSB is one of the SSBs associated with the at least two ROs.

In an optional implementation manner, the method may further include: the network device sending first indication information to the terminal device, where the first indication information is used to indicate i.

In an optional implementation manner, the method may further include: the network device receiving second indication information from the terminal device, where the second indication information is used to indicate i.

In an optional implementation manner, the network device sends a random access response to the terminal device on the beam associated with the first SSB. The specific implementation manner is: the network device, according to the first RA-RNTI, A random access response is sent to the terminal device on the associated beam, where the first RA-RNTI is determined according to the time-frequency resource position of the i-th RO.

In an optional implementation manner, the method may further include: the network device sending third indication information to the terminal device, where the third indication information is used to indicate the first SSB.

In an optional implementation manner, the network device sends the third indication information to the terminal device. A specific implementation manner is: the network device sends DCI to the terminal device, and the DCI includes the third indication information.

In an optional implementation manner, the third indication information occupies n or bits; wherein, n is the total number of SSBs associated with the above-mentioned at least two ROs, or, n is the total number of SSBs in the serving cell of the terminal device, or, n is the SSB actually used by the serving cell of the terminal device the total number of .

In an optional implementation manner, the network device sends a random access response to the terminal device on the beam associated with the first SSB. The specific implementation manner is: the network device, according to the first RA-RNTI, Send a random access response to the terminal device on the associated beam; wherein, the first RA-RNTI is determined according to the time-frequency resource positions of the at least two ROs, or the first RA-RNTI is determined according to the at least two ROs in the above-mentioned The time-frequency resource position of an RO is determined.

In the third aspect, the embodiment of the present application provides a communication device, the device includes a communication device for realizing the first aspect or the first aspect A unit of the method described in the second aspect.

In a fourth aspect, the embodiment of the present application provides another communication device, including a processor; the processor is configured to execute the method described in the first aspect or the second aspect.

In an optional implementation manner, the communication device may further include a memory; the memory is used to store a computer program; the processor is specifically used to call the computer program from the memory, and execute the computer program described in the first aspect or the second aspect. Methods.

In a fifth aspect, the embodiment of the present application provides a chip, the chip is used to execute the method described in the first aspect or the second aspect.

In the sixth aspect, the embodiment of the present application provides a chip module, the chip module includes a communication interface and a chip, wherein: the communication interface is used for internal communication of the chip module, or for the chip module to communicate with external devices ; The chip is used to execute the method described in the first aspect or the second aspect.

In a seventh aspect, the embodiment of the present application provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, the computer program includes program instructions, and when the program instructions are executed by a processor, the The processor executes the method described in the first aspect or the second aspect.

In an eighth aspect, an embodiment of the present application provides a computer program product including a computer program or an instruction. When the computer program or instruction is run on a computer, the computer executes the method described in the first aspect or the second aspect.

Through this embodiment of the application, when the terminal device sends random access requests on at least two ROs respectively, the network device can send a random access response through the beam associated with the first SSB, and the terminal device can send a random access response through the beam associated with the first SSB. The random access response is received on the beam, and the first SSB is one of the SSBs associated with at least two ROs, which helps to improve the possibility that the terminal device receives the random access response, and further helps to improve the random access response. probability of success.

Description of drawings

FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application;

FIG. 2 is a schematic flow diagram of a four-step random access provided by an embodiment of the present application;

FIG. 3 is a schematic flowchart of a communication method provided in an embodiment of the present application;

FIG. 4 is a schematic flowchart of another communication method provided by an embodiment of the present application;

FIG. 5 is a schematic flowchart of another communication method provided by the embodiment of the present application;

FIG. 6 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of another communication device provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a chip module provided by an embodiment of the present application.

Detailed ways

It should be understood that the terms "first", "second" and the like involved in the embodiments of the present application are used to distinguish different objects, rather than to describe a specific order. "At least one" in the embodiments of the present application refers to one or more, and multiple refers to two or more. "And/or" in the embodiment of this application describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B, which may indicate the following three situations: A exists alone, and A and B exist simultaneously , B exists alone. Wherein, A and B may be singular or plural. The character "/" can indicate that the contextual objects are an "or" relationship. In addition, the symbol "/" can also represent a division sign, that is, to perform a division operation.

"At least one of the following" or similar expressions in the embodiments of the present application refer to any combination of these items, including any combination of a single item or a plurality of items. For example, at least one item (piece) of a, b or c can represent the following seven situations: a, b, c, a and b, a and c, b and c, a, b and c. Wherein, each of a, b, and c may be an element, or a set containing one or more elements.

In the embodiments of the present application, the references to "of", "corresponding, relevant", "corresponding", "associated, related", and "mapped" can sometimes be mixed. It should be noted that when no distinction is emphasized, the concepts or meanings to be expressed are consistent.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application. The communication system may include, but is not limited to, a terminal device and a network device. The number and configuration of the devices shown in Figure 1 are for example and do not constitute a limitation to the embodiment of the application. In practical applications, two or more Network equipment, two or more terminal equipment. The communication system shown in FIG. 1 includes one terminal device 101 and one network device 102 as an example.

Wherein, the terminal device in the embodiment of the present application is a device with a wireless transceiver function, which can be referred to as a terminal (terminal), user equipment (user equipment, UE), mobile station (mobile station, MS), mobile terminal (mobile terminal, MT), access terminal equipment, vehicle terminal equipment, industrial control terminal equipment, UE unit, UE station, mobile station, remote station, remote terminal equipment, mobile equipment, UE terminal equipment, wireless communication equipment, UE agent or UE device etc. Terminal equipment can be fixed or mobile. It should be noted that the terminal device can support at least one wireless communication technology, such as long-term evolution (long time evolution, LTE), new air interface (new radio, NR), wideband code division multiple access (wideband code division multiple access, WCDMA) wait. For example, the terminal device may be a mobile phone (mobile phone), a tablet computer (pad), a desktop computer, a notebook computer, an all-in-one computer, a vehicle terminal, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal Equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grid, transportation Wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, cellular phones, cordless phones, session initiation protocol (SIP) phones, Wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, wearable devices, future mobile The terminal equipment in the communication network or the terminal equipment in the public mobile land network (public land mobile network, PLMN) that will evolve in the future, etc. In some embodiments of the present application, the terminal device may also be a device having a transceiver function, such as a chip module. Wherein, the chip module may include a chip, and may also include other discrete devices. The embodiment of the present application does not limit the specific technology and specific device form adopted by the terminal device.

In the embodiment of the present application, the network device is a device that provides a wireless communication function for the terminal device. The network device may be an access network (AN) device, and the AN device may be a radio access network (RAN) equipment. Wherein, the access network device may support at least one wireless communication technology, such as LTE, NR, WCDMA and so on. Exemplarily, the access network equipment includes but is not limited to: a next-generation base station (generation node B, gNB) in a fifth-generation mobile communication system (5th-generation, 5G), an evolved node B (evolved node B, eNB), Radio network controller (radio network controller, RNC), node B (node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved node B, or home node B, HNB), baseband unit (baseband unit, BBU), TRP, transmission point (transmitting point , TP), Mobile Switching Center, etc. The network device may also be a wireless controller, a centralized unit (centralized unit, CU) and/or a distributed unit (distributed unit, DU) in a cloud radio access network (cloud radio access network, CRAN) scenario, or an access network device It can be a relay station, an access point, a vehicle-mounted device, a terminal device, a wearable device, and an access network device in future mobile communications or an access network device in a future evolved PLMN. In some embodiments, the network device may also be a device that provides a wireless communication function for the terminal device, such as a chip module. Exemplarily, the chip module may include a chip, and may also include other discrete devices. The embodiment of the present application does not limit the specific technology and specific device form adopted by the network device.

It should be noted that the technical solutions of the embodiments of the present application may be applied to various communication systems. For example: LTE communication system, 4th generation (4th generation, 4G) mobile communication system, 5G mobile communication system, 5G NR system. Optionally, the method in this embodiment of the present application is also applicable to various communication systems in the future, such as 6G systems or other communication networks.

It can be understood that the communication system described in the embodiment of the present application is to illustrate the technical solutions of the embodiments of the present application more clearly, and does not constitute a limitation to the technical solutions provided in the embodiments of the present application. Those skilled in the art know that with the system For the evolution of architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

First, the technical terms involved in the embodiments of the present application are introduced to facilitate the understanding of those skilled in the art.

(1) Random access process

The random access process can enable the terminal device to access the network and establish a connection with the network. Wherein, according to the communication times of the random access process, the random access process can be divided into a four-step random access process and a two-step random access process. Specifically, the four-step random access process may include four messages Msg1, Msg2, Msg3 and Msg4. As shown in FIG. 2 , it is a schematic flowchart of a four-step random access process.

First, the terminal device sends a random access request to the network device through a Physical Random Access Channel (PRACH). Wherein, the random access request may also be called message 1 (Msg1). Specifically, the random access request may include a random access preamble (random access preamble, RA preamble). Among them, the RA preamble is used to request access to the network, that is, the main function of the RA preamble is to inform the network device that there is a random access request, and enable the network device to estimate the transmission delay with the terminal device. For details, please refer to the following introduction , which will not be repeated here.

Secondly, the network device receives the random access request and sends a random access response (Random Access Response, RAR) to the terminal device. Among them, RAR can also be called message 2 (Msg2).

In some embodiments, the network device sends the RAR to the terminal device on a PDSCH (Physical Downlink Shared Channel, physical downlink shared channel) payload (payload) resource. For example, in the embodiment of the present application, the RAR is obtained by scrambling through RA-RNTI (random access radio network temporary identifier, random access radio network temporary identifier). In some embodiments, the value of the RA-RNTI is determined by the time-frequency resource location of the resource bearing the RA preamble.

For the terminal device, after the terminal device sends the RA preamble, it monitors in the RAR time window (window). Listen to the PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel) scrambled by the RA-RNTI to receive the RAR corresponding to the RA-RNTI. If no RAR is received within the RAR time window, it is considered that the random access procedure has failed. If the terminal device successfully uses the RA-RNTI to parse the PDCCH to obtain downlink control information (Downlink Control Information, DCI), then the terminal device tries to use the RA-RNTI to parse the PDSCH payload according to the DCI. Each random access request corresponds to an RA preamble ID (or RA preamble index). If the terminal device successfully decodes the PDSCH payload, it will check whether the random access preamble identity (RAPID) is the same as that sent by Msg1 The RA preamble ID used at the time is the same. If they are the same, Msg2 is successfully demodulated, and the terminal device can stop listening to the RAR at this time.

Then, the terminal device receives the RAR and sends message 3 to the network device. Among them, the message 3 is Msg3. For example, the terminal device sends Msg3 to the network device on PUSCH (Physical Uplink Share Channel, physical uplink shared channel). Further, in some embodiments, Msg3 includes the unique identifier of the terminal device. This flag can be used for conflict resolution. For example, for a terminal device in RRC_CONNECTED (Radio Resource Control_CONNECTED, radio resource control connection) state, the only identifier of the terminal device is C-RNTI (Cell Radio Network Temporary Identifier, wireless network temporary identifier); another example, for non-RRC_CONNECTED For a state terminal device, the only identifier of the terminal device is the unique terminal device identifier from the core network (such as S-TMSI (SAE Temporary Mobile Subscriber Identifier, s Temporary Mobile Subscriber Identifier) or a random number).

Finally, the network device receives Msg3 and sends message 4 to the terminal device. Wherein, message 4 may also be called Msg4.

Specifically, in the conflict resolution mechanism, the network device carries the flag for uniquely identifying the terminal device in Msg4 to indicate the winning terminal device, and other terminal devices that do not win the conflict resolution will re-initiate random access. If the PDSCH received by the terminal device in Msg4 is scrambled by the TC-RNTI (Temporary Cell Radio Network Temporary Identifier) specified in the RAR message, the successfully decoded MAC (Medium Access Control, Media Access control) UE CRID (Contention Resolution Identity, contention resolution identity) MAC CE (control element, control element) contained in PDU (Protocol Data Unit, protocol data unit) and CCCH (Common Control Channel, common control channel) sent by Msg3 ) SDU (service Data Unit, service data unit) match, the terminal device will consider the random access successful and convert its own TC-RNTI to C-RNTI.

It should be noted that during the random access process, Msg1 and Msg2 mainly complete uplink time synchronization; while the main purpose of Msg3 and Msg4 is to specify a unique and legal identity for the terminal device for subsequent data transmission.

(2) Random access preamble (RA preamble)

RA preamble is used to request access to the network and inform the network device that there is a random access request. The RA preamble can be used for network devices to distinguish terminal devices that initiate random access during random access, and can also be used for other purposes, which are not limited in this embodiment of the application.

For example, a cell has 64 available RA preambles, which form an RA preamble sequence, and each RA preamble has a unique index (RA preamble index) in the RA preamble sequence. Among them, the terminal device will select one (or one designated by the network device) RA preamble from the RA preamble sequence to use the physical A random access channel opportunity (PRACH occasion, RO) is used for transmission, that is, the RA preamble is carried (or transmitted) by the PRACH occasion.

(3) Random Access Radio Network Temporary Identifier (RA-RNTI)

As an example, in the embodiment of this application, when the terminal device sends Msg1, it will calculate and save the RA-RNTI. After the network device receives the Msg1, it will also calculate the RA-RNTI, and the RAR is obtained by scrambling the RA-RNTI. Therefore, only the terminal device that sends Msg1 at the time-frequency resource position identified by the RA-RNTI can successfully decode the RAR. Exemplarily, the RA-RNTI can be determined according to the time-frequency resource location of the RO, see formula (1) for details:
RA-RNTI=1+s_id+14*t_id+14*80*f_id+14*80*8*ul_carrier_id (1)

Among them, s_id represents the index of the first orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbol of RO, and the value is 0≤s_id<14; t_id represents the first slot of RO (in a system frame ) index, the value is 0≤t_id<80; f_id represents the index of RO in the frequency domain, the value is 0≤f_id<8; ul_carrier_id represents the uplink carrier used to transmit RA preamble, and the value 0 represents the conventional uplink A normal uplink (NUL) carrier, and a value of 1 indicates a supplementary uplink (SUL) carrier.

(4) Scrambling

Scrambling is a digital signal processing method, using the scrambling code and the original signal XOR operation to obtain a new signal. Usually, the function of uplink physical channel scrambling is to distinguish different terminal devices, and downlink scrambling can distinguish cells and channels. Among them, the scrambling code can be used to scramble and descramble the original signal. For example, the scrambling code may scramble downlink control information (DCI), or may also be referred to as scrambling the PDCCH. Scrambling the DCI specifically refers to scrambling a cyclic redundancy check (cyclic redundancy check, CRC) field of the DCI. Correspondingly, the terminal device descrambles the received DCI, specifically, the terminal device descrambles the CRC field of the DCI using a corresponding type of scrambling code to determine the format or type of the DCI. Exemplarily, in this embodiment of the present application, the scrambling code may include a random access radio network temporary identifier (random access radio network temporary identifier, RA-RNTI).

Please refer to FIG. 3 , which is a schematic flowchart of a communication method provided by an embodiment of the present application. As shown in Figure 3, the communication method may include but not limited to the following steps:

S301. The terminal device sends random access requests to the network device respectively on at least two ROs. Correspondingly, the network device respectively receives random access requests from the terminal device on the at least two ROs.

A terminal device can send a random access request on an RO. The fact that the terminal device sends random access requests on at least two ROs indicates that the terminal device sends a random access request on each of the at least two ROs. For example, taking at least two ROs as RO1 and RO2 as an example, the terminal device sends a random access request to the network device on RO1 and RO2 respectively, which can be understood as: the terminal device sends a random access request to the network device on RO1, And send a random access request to the network device on RO2. Wherein, the random access request sent on RO1 and the random access request sent on RO2 may be independent of each other.

Exemplarily, for the four-step random access process, the random access request in S301 may also be called Msg1, and the random access request includes an RA preamble.

In some embodiments of the present application, after the random access procedure is triggered, the terminal device may perform the following steps: (1) Select the SSB. (2) According to the relationship between SSB and RO, select the RO associated with the SSB selected in step (1), and then select an RA preamble from the RA preamble available on the selected RO, and Msg1 contains the RA preamble or the The ID or index of the RA preamble. Optionally, the number of RA preambles available on each RO is 64. It should be noted that the RA preamble in the random access requests respectively sent by the terminal device on at least two ROs is the same. (3) Select a PRACH resource for carrying the RA preamble. (4) Calculate RA-RNTI. After sending Msg1, the terminal device receives a random access response according to the RA-RNTI.

It should be understood that the above at least two ROs may be associated with the same SSB, or may be associated with different SSBs. In this embodiment of the present application, each beam may be associated with at least one SSB, and the beams associated with different SSBs may be the same or different. For example, beams associated with different SSBs have different directions, or beams associated with different SSBs have the same direction. Beams associated with the SSBs associated with the at least two ROs may be the same or different. For example, take at least two ROs as RO1, RO2 and RO3 as an example. In this case, the terminal device sends random access requests on RO1, RO2, and RO3 respectively. RO1 is associated with SSB1, RO2 is associated with SSB2, and RO3 is associated with SSB2. SSB1 is associated with beam 1, and SSB2 is associated with beam 2. Alternatively, both SSB1 and SSB2 are associated with beam 1. It should be noted that the SSBs associated with RO1, RO2, and RO3 may also be different.

In the embodiment of the present application, the mapping relationship (or association relationship, correspondence relationship) between SSB and RO can be indicated by the high-level parameter SSB-per-rach-occasion (N). For example, the value of N can be {1 /8,1/4,1/2,1,2,4,8,16}. If N<1, it means that 1 SSB can be mapped to 1/N ROs, for example, if N=1/8, then one SSB is mapped to 8 ROs; if N=1, it means that 1 SSB is mapped to 1 RO In RO; if N>1, it means that N SSBs can be mapped in one RO. The number of configurable ROs in the frequency domain is configured by the high layer parameter msg1-FDM. For example, the number of ROs in the frequency domain may be {1, 2, 4, 8}.

The number of RA preambles available on each RO is 64, where the number of RA preambles available for each SSB is indicated by the high-layer parameter CB-PreamblesPerSSB(R). For example, in the case of N>1, N SSBs are associated with one RO, SSB n can select one of the R RA preambles to send Msg1, 0≤n≤N-1, n refers to the SSB index, and the SSB n The index of the associated RA preamble is from start.

For example, with N=2, as an example. In this case, two SSBs are associated with one RO, the RA preamble index associated with SSB0 starts from 0, and the RA preamble index associated with SSB1 starts from 32. That is to say, SSB0 is associated with RA preambles whose index is 0-31, and SSB1 is associated with RA preambles whose index is 32-(the total number of corresponding RA preambles-1).

S302. The network device sends a random access response to the terminal device on a beam associated with a first SSB, where the first SSB is one of SSBs associated with at least two ROs. Correspondingly, the terminal device receives the random access response on the beam associated with the first SSB.

In this embodiment of the application, when the terminal device sends random access requests on at least two ROs, the network device can send a random access response through the beam associated with the first SSB, and the terminal device can send a random access response through the beam associated with the first SSB. The beam receives the random access response, and the first SSB is one of the SSBs associated with at least two ROs, which helps to improve the possibility that the terminal device receives the random access response, and further improves the probability of successful random access. probability.

In some embodiments, the first SSB may be pre-agreed between the terminal device and the network device in the following manner:

Manner 1: the first SSB is the SSB associated with the i-th RO among the at least two ROs, and i is a positive integer greater than or equal to 1. For a specific description of mode 1, refer to the embodiment corresponding to FIG. 4 .

Manner 2: The network device sends third indication information to the terminal device to indicate the first SSB. For a specific description of mode 2, refer to the embodiment corresponding to FIG. 5 .

In an implementation manner, the network device sends a random access response to the terminal device on the beam associated with the first SSB according to the first RA-RNTI. Correspondingly, the terminal device receives the random access response on the beam associated with the first SSB according to the first RA-RNTI.

Exemplarily, the network device sends a random access response to the terminal device on the beam associated with the first SSB according to the first RA-RNTI, including: after the network device uses the first RA-RNTI to scramble the RAR, and Send a PDCCH to the terminal device on the beam associated with the first SSB, the PDCCH is scrambled by the first RA-RNTI; then send a PDSCH to the terminal device on the beam associated with the first SSB, RAR is carried in the PDSCH payload, the PDCCH Used to schedule the PDSCH. Wherein, the RO used to calculate the first RA-RNTI is associated with the first SSB. Correspondingly, the terminal device receives the random access response on the beam associated with the first SSB according to the first RA-RNTI, including: within the RAR time window, the terminal device listens on the beam associated with the first SSB by the first RA-RNTI scrambled PDCCH, if the PDCCH scrambled by the first RA-RNTI is monitored, receive the PDSCH on the beam associated with the first SSB according to the monitored PDCCH, and use the first RA-RNTI to demodulate the PDSCH payload to get RAR.

Wherein, the first RA-RNTI is determined according to the time-frequency resource positions of the at least two ROs. For example, take the above at least two ROs as RO1, RO2 and RO3 as an example. The first RA-RNTI may be determined according to the time-frequency resource positions of RO1, RO2, and RO3. Exemplarily, taking the time-frequency resource position including the index of the first OFDM symbol of RO, the index of the first slot of RO, and the index of RO in the frequency domain as an example, the specific process is: the first OFDM symbol of RO1 The index of the OFDM symbol, the index of the first slot of RO1, the index of RO1 in the frequency domain, and the uplink carrier used to transmit the RA preamble are substituted into formula (1) to obtain the RA-RNTI corresponding to RO1; and the first slot of RO2 The index of OFDM symbols, the index of the first slot of RO2, the index of RO2 in the frequency domain, and the uplink carrier used to transmit the RA preamble are substituted into formula (1) to obtain the RA-RNTI corresponding to RO2; the first slot of RO3 The index of OFDM symbols, the index of the first slot of RO3, the index of RO3 in the frequency domain, and the uplink carrier used to transmit the RA preamble are substituted into formula (1) to obtain the RA-RNTI corresponding to RO3; then, according to the corresponding The RA-RNTI corresponding to RO2, the RA-RNTI corresponding to RO3, and the RA-RNTI corresponding to RO3 determine the first RA-RNTI (for example, take an average value).

The RA-RNTIs corresponding to the above RO1, RO2, and RO3 are respectively determined by the time-frequency resource positions of the respective ROs. Determine the location of the frequency resource. For example, taking the above-mentioned at least two ROs as RO1, RO2 and RO3 as an example, the RA-RNTI corresponding to RO1 can be determined by the time-frequency resource location of RO1, and the RA-RNTI corresponding to RO2 and RO3 can be determined by the RA-RNTI of RO3. The location of the time-frequency resource is determined.

Optionally, the first RA-RNTI may also be determined according to time-frequency resource locations of two or more ROs in the at least two ROs. For example, take the above at least two ROs as RO1, RO2 and RO3 as an example. The first RA-RNTI may be determined according to the time-frequency resource positions of the first two ROs (ie, RO1 and RO2). Exemplarily, the specific process is: substituting the time-frequency resource positions of RO1 and RO2 into the formula (1) to obtain the RA-RNTI corresponding to RO1 and RO2 respectively (the method is the same as that of determining the RA-RNTI corresponding to RO in the previous example , will not be described here); then determine the first RA-RNTI according to the RA-RNTI corresponding to RO1 and the RA-RNTI corresponding to RO2 (for example, take an average value).

Optionally, the first RA-RNTI may be determined according to the time-frequency resource position of one of the at least two ROs. For example, the first RA-RNTI is determined according to the time The location of the frequency resource is determined. For example, take the above at least two ROs as RO1, RO2 and RO3 as an example. The first RA-RNTI may be determined according to the time-frequency resource location of the first RO (ie, RO1). Exemplarily, taking the time-frequency resource position including the index of the first OFDM symbol of RO, the index of the first slot of RO, and the index of RO in the frequency domain as an example, the index of the first OFDM symbol of RO1, The index of the first slot of RO1, the index of RO1 in the frequency domain, and the uplink carrier used to transmit the RA preamble are substituted into formula (1) to obtain the RA-RNTI corresponding to RO1, and the first RA-RNTI is the RA-RNTI corresponding to RO1. RNTI.

Or, the first RA-RNTI is determined according to the time-frequency resource position of the second RO among the above at least two ROs, or, the first RA-RNTI is determined according to the time-frequency resource position of the last RO among the above-mentioned at least two ROs definite.

In an implementation manner, after the terminal device sends random access requests on at least two ROs, it can determine the RA-RNTI corresponding to the RO according to the time-frequency resource position of each RO in the at least two ROs. value; the terminal device listens to the PDCCH in the RAR time window to obtain the DCI according to the value of the RA-RNTI corresponding to the RO, and the terminal device uses the RA-RNTI to parse the PDSCH payload according to the DCI to receive the corresponding RA-RNTI scrambled RAR message. For example, after the terminal device sends random access requests on at least two ROs, in the RAR time window, it can monitor PDCCHs under different beams in each slot (slot) in a beam sweeping manner. Beam scanning is to concentrate energy in a certain direction at a certain moment, and this direction can send the signal farther, but the signal cannot be received in other directions; then, the next moment is sent in another direction; finally through continuous Changing the beam direction can increase the coverage of the cell.

Exemplarily, the at least two ROs are RO1 and RO2 respectively as an example, where RO1 is associated with SSB0, RO2 is associated with SSB1; SSB0 is associated with beam 1, and SSB1 is associated with beam 2. After the terminal device sends a random access request on RO1 and RO1 respectively, in the RAR time window, the terminal device takes turns listening to the PDCCH scrambled by the RA-RNTI corresponding to RO1 on beam 1 and listening to the PDCCH corresponding to RO2 on beam 2. PDCCH scrambled by RA-RNTI.

In another implementation manner, after the terminal device sends random access requests on at least two ROs, it may determine the value of the first RA-RNTI according to the time-frequency resource position of one RO in the at least two ROs; the terminal In the RAR time window, the device monitors the PDCCH according to the value of the first RA-RNTI to obtain the DCI; then, receives and parses the PDSCH payload according to the obtained DCI to obtain the RAR message.

Exemplarily, taking at least two ROs as RO1 and RO2 respectively, and the terminal device determines the value of the first RA-RNTI according to the time-frequency resource position of the first RO in the at least two ROs as an example, the terminal device is on RO1 and RO2 After sending random access requests respectively, the terminal device can determine the value of the first RA-RNTI according to the time-frequency resource position of RO1; then, in the RAR time window, monitor the PDCCH scrambled by the value of the first RA-RNTI.

Through the above two methods, it can be ensured that the RA-RNTI values determined by the terminal device and the network device are consistent, the network device scrambles the random access response through the determined RA-RNTI value, and the terminal device scrambles the random access response through the determined RA-RNTI value The value of RA-RNTI descrambles the random access response. Therefore, the RA-RNTI values determined by the terminal device and the network device are consistent, which is beneficial to ensure that the terminal device successfully demodulates the DCI and the random access response.

Through this embodiment of the application, when the terminal device sends random access requests on at least two ROs respectively, the network device can send a random access response through the beam associated with the first SSB, and the terminal device can send a random access response through the beam associated with the first SSB. The random access response is received on the beam, and the first SSB is one of the SSBs associated with at least two ROs, which helps to improve the possibility that the terminal device receives the random access response, and further helps to improve the random access response. probability of success. On the other hand, the value of RA-RNTI determined by the terminal device and the network device is consistent, which is beneficial to ensure that the terminal device The device successfully demodulates the DCI and the random access response.

Please refer to FIG. 4 , which is a schematic flowchart of another communication method provided by an embodiment of the present application. The embodiment corresponding to FIG. 4 mainly describes that the first SSB is the SSB associated with the i-th RO among the aforementioned at least two ROs. As shown in Figure 4, the communication method may include but not limited to the following steps:

S401. The terminal device sends random access requests on at least two ROs respectively. Correspondingly, the network device respectively receives random access requests from the terminal device on at least two ROs.

It should be noted that, for the execution process of step S401, reference may be made to the specific description of step S301 in FIG. 3 , which will not be repeated here.

S402. The network device sends a random access response to the terminal device on the beam associated with the first SSB, where the first SSB is associated with the i-th RO among the aforementioned at least two ROs, and i is a positive integer greater than or equal to 1 . Correspondingly, the terminal device receives the random access response on the beam associated with the first SSB.

Wherein, i can be preset by the protocol, or, i can be determined by the network device and the network device indicates the value of i to the terminal device. Exemplarily, the network device sends the first indication information to the terminal device, and the first indication information Used to indicate i. Correspondingly, the terminal device receives the first indication information. Optionally, the first indication information may be system information.

Alternatively, i may be determined by the terminal device and the terminal device instructs the network device to take the value of i. Exemplarily, the terminal device sends second indication information, where the second indication information is used to indicate i. Correspondingly, the network device receives the second indication information from the terminal device. For example, the terminal device associates the i-th RO among the at least two ROs with the first SSB, and then the terminal device sends the second indication information to the network device.

Optionally, the second indication information may explicitly indicate the value of i, for example, the second indication information carries the value of i. Alternatively, the second indication information may implicitly indicate the value of i. For example, when the terminal device is in a non-RRC_CONNECTED state, the terminal device may send an RA preamble to the network device to implicitly indicate the value of i. For example, taking the value of i indicated by the index of RA preamble as an example, if the number of available RA preambles is 64, the value range of the index of RA preamble is [0,1,2,3...61,62,63] , if the index of the RA preamble sent by the terminal device is 3, then the value of i can be 3. At this time, the second indication information may be carried in Msg1 in the four-step random access process, or in message A (also referred to as MsgA) in the two-step random access process. It can be understood that, when the terminal equipment is in the RRC_CONNECTED state, the second indication information may be carried in the system information.

In an implementation manner, the first SSB may be determined according to the signal strengths of the aforementioned at least two RO-associated SSBs. Optionally, the signal strength of the first SSB is the largest among the SSBs associated with the aforementioned at least two ROs. Exemplarily, the terminal device may measure the reference signal receiving power (Reference Signal Receiving Power, RSRP) of the SSB, and determine the SSB with the largest RSRP value as the first SSB. Alternatively, the signal strength of the first SSB ranks in the top a position of the SSBs associated with the aforementioned at least two ROs. Or, the signal strength of the first SSB is greater than a preset signal strength threshold. Taking the aforementioned at least two ROs being b ROs as an example, b is a positive integer greater than or equal to 2, and a may be a positive integer greater than or equal to 1 and less than b.

In another implementation manner, the first SSB may be an SSB associated with a beam selected by the terminal device for receiving the random access response (ie, Msg2). Optionally, when determining the association relationship between the SSB and the RO, the terminal device may associate the SSB associated with the beam selected for receiving the random access response (that is, Msg2) with the i-th RO, that is, establish the first SSB The association relationship with the i-th RO.

In an implementation manner, the terminal device receives the random access response on the beam associated with the first SSB, including: The terminal device receives the random access response on the beam associated with the first SSB according to the first RA-RNTI, where the first RA-RNTI is determined according to the time-frequency resource position of the i-th RO. Correspondingly, the network device sends a random access response to the terminal device on the beam associated with the first SSB, including: the network device sends a random access response to the terminal device on the beam associated with the first SSB according to the first RA-RNTI. enter the response.

Exemplarily, taking the aforementioned at least two ROs as RO1 and RO2 respectively, and i=1 as an example, after the terminal device sends random access requests on RO1 and RO2 respectively, the terminal device may Determine the value of the first RA-RNTI at the time-frequency resource location; then monitor the PDCCH scrambled by the value of the first RA-RNTI in the RAR time window to obtain DCI, and use the value of the first RA-RNTI to parse the PDSCH according to the DCI payload, to receive the RAR message obtained by scrambling the value of the first RA-RNTI.

In this embodiment of the application, the value of i is specified, and the network device sends a random access response on the beam associated with the SSB (first SSB) associated with the i-th RO among the aforementioned at least two ROs. Correspondingly, The terminal device can receive the PDSCH on the beam associated with the first SSB, and then demodulate the PDSCH payload to obtain a random access response, which helps to improve the possibility of the terminal device receiving the random access response, and further improves the random access response. probability of success.

Please refer to FIG. 5 , which is a schematic flowchart of another communication method provided by an embodiment of the present application. The embodiment in FIG. 5 mainly describes how to indicate the first SSB through the third indication information. As shown in Figure 5, the communication method may include but not limited to the following steps:

S501. The terminal device sends random access requests on at least two ROs respectively. Correspondingly, the network device respectively receives random access requests from the terminal device on at least two ROs.

It should be noted that, for the execution process of step S501, reference may be made to the specific description of step S301 in FIG. 3 , which will not be repeated here.

S502. The network device sends third indication information to the terminal device, where the third indication information is used to indicate the first SSB, where the first SSB is one of the SSBs associated with the aforementioned at least two ROs. Correspondingly, the terminal device receives the third indication information.

Wherein, the first SSB is an SSB associated with a beam used by the terminal device to receive the random access response.

In an implementation manner, the third indication information is indicated by the network device to the terminal device through the DCI. Specifically, the network device sends the DCI, and correspondingly, the terminal device receives the DCI, where the DCI includes the third indication information.

In this embodiment of the present application, the terminal device sends Msg1 (including random access requests) on at least two ROs respectively, and then the network device can send PDCCH DCI in a beam scanning manner, and the DCI indicates which beam the network device uses to send Msg2. After decoding the DCI on any beam, the terminal device does not need to perform beam scanning, but can directly receive the PDSCH on the beam associated with the first SSB indicated by the DCI, and then demodulate the PDSCH payload to obtain a random access response. It can be understood that after the terminal device decodes the DCI, it knows that the network device sends a random access response on the beam associated with the first SSB, so the terminal device can directly monitor the PDSCH on the beam associated with the first SSB without scanning the beam. monitor the PDSCH in the same way. During the beam scanning process, the beam needs to be changed frequently, and the terminal device directly monitors the PDSCH on the beam associated with the first SSB, which is beneficial to reduce the monitoring time and the power consumption of the terminal device.

Exemplarily, the above-mentioned at least two ROs are RO1, RO2, and RO3 respectively, and RO1 is associated with SSB0, RO2 is associated with SSB1, and RO3 is associated with SSB2; SSB0 is associated with beam 1, SSB1 is associated with beam 2, and SSB2 is associated with beam 3 as an example. The terminal device sends random access requests on RO1, RO2, and RO3 respectively. After receiving the random access request, the network device, Send PDCCH DCI on beam 1, beam 2, and beam 3 in turn, and then send PDSCH on beam 3, wherein the DCI instructs the network device to send a random access response through the beam associated with SSB2 (ie, beam 3). After the terminal device sends a random access request, it listens to the PDCCH on beam 1, beam 2, and beam 3 in turn; if the terminal device monitors the PDCCH on beam 3, then the terminal device decodes the DCI and learns the beam associated with the network device through SSB2 (that is, beam 3) to send a random access response; then, the terminal device can directly monitor the PDSCH on beam 3 without switching beams, and then demodulate the PDSCH payload to obtain a random access response.

In an implementation manner, the third indication information may occupy n or bits; among them, is an upward rounding function, n is the total number of SSBs associated with the aforementioned at least two ROs, or, n is the total number of SSBs in the serving cell of the terminal device, or, n is the number of SSBs actually used by the serving cell of the terminal device The total number of SSBs.

Wherein, in the embodiment of the present application, the serving cell of the terminal device may be understood as the cell where the SSBs associated with the at least two ROs are located.

The SSB actually used by the serving cell of the terminal device refers to: the total number of SSBs indicated by the network device to the terminal device, that is, the total number of SSBs actually sent by the network device to the terminal device. Exemplarily, the total number of SSBs in cell a is 8, but the actual number of SSBs sent is less than 8. For example, there is no user connected to the cell in a certain coverage area, then the cell does not need to send all SSBs. Assuming that there are 6 SSBs to send in a certain low-frequency cell, then using 6-bit information to instruct the network device on the beam associated with the SSB to send the random access response can save the number of bits occupied by the third indication information. Optionally, the aforementioned at least two (such as m) RO-associated SSBs may be SSBs with the top m signal strengths in the serving cell of the terminal device. Exemplarily, assuming that there are 6 SSBs for transmission in a certain low-frequency cell, the terminal device may select beams associated with 4 SSBs with better signal strengths among the 6 SSBs to send Msg1.

Optionally, a bit field may be extended in the reserved bit (reserve bit) of the DCI to indicate the beam associated with the SSB on which the network device sends the random access response, that is, n or bits may be reserved bits in DCI.

In one implementation, when the third indication information occupies n bits, each of the n bits corresponding to the n bits corresponds to an SSB, and the first SSB can be the n bits The SSB corresponding to the bit whose value is the first preset value among the bits. The SSB corresponding to the bit with the value of the first preset value may indicate that the network device uses the beam associated with the SSB to send Msg2 (that is, send a random access response); the bit with the value of the second preset value corresponds to The SSB of , may indicate that the network device does not use the beam associated with the SSB to send Msg2 (that is, send a random access response).

Exemplarily, if n=4, the first preset value is 1, and if the value of the 4 bits occupied by the third indication information is 1000, then the first SSB is the 4 bits occupied by the third indication information The first bit in the bit corresponds to the SSB. If the value of the 4 bits occupied by the third indication information is 0100, then the first SSB is the SSB corresponding to the second bit in the 4 bits occupied by the third indication information.

Optionally, n (or The SSBs corresponding to each of the ) bits are arranged in ascending order according to the SSB index. In other words, if n=4, the index of the SSB corresponding to the first bit of the four bits<the index of the SSB corresponding to the second bit<the index of the SSB corresponding to the third bit<the fourth bit The index of the SSB corresponding to the bit. Optionally, n (or The indices of the SSBs corresponding to each of the ) bits may be continuous or discontinuous. For example, if n=4, the index of the SSB corresponding to the 4 bits may be 0, 1, 2, 3, or 0, 2, 4, 6.

Exemplarily, the third indication information occupies 4 bits (ie n=4), and n represents the total number of SSBs associated with the aforementioned at least two ROs, and the SSBs associated with the aforementioned at least two ROs are in ascending order of SSB index Arranged as: SSB0, SSB1, SSB2, SSB3 as an example, then the SSB corresponding to the first bit, the second bit, the third bit, and the fourth bit in the 4 bits are: SSB0 , SSB1, SSB2, SSB3. If the value of the 4 bits occupied by the third indication information is 1000, then the first SSB is SSB0. If the value of the 4 bits occupied by the third indication information is 0100, then the first SSB is SSB1.

In one implementation, the third indication information occupies In the case of bits, the first SSB is the bits corresponding to The SSB corresponding to the value of each bit. It should be noted, Each value of bits can correspond to an SSB, or, The partial value of bits corresponds to an SSB.

Exemplarily, the third indication information occupies 2 bits (i.e. n=4), and n represents the total number of SSBs associated with the aforementioned at least two ROs, and the SSBs associated with the aforementioned at least two ROs are in ascending order of SSB index The arrangement is: SSB0, SSB1, SSB2, and SSB3 as an example, then the SSBs corresponding to the values of 2 bits 00, 01, 10, and 11 are: SSB0, SSB1, SSB2, and SSB3. If the value of the 2 bits occupied by the third indication information is 00, then the first SSB is SSB0. If the value of the 2 bits occupied by the third indication information is 11, then the first SSB is SSB3.

Exemplarily, the third indication information occupies 3 bits (i.e. n=6), n represents the total number of SSBs actually used by the serving cell of the terminal device, and the SSBs actually used by the serving cell of the terminal device are arranged in ascending order of SSB index as follows: : SSB0, SSB3, SSB4, SSB5, SSB6, and SSB7 as an example, then the SSBs corresponding to the values of 3 bits 000, 001, 010, 011, 100, and 101 are: SSB0, SSB3, SSB4, SSB5, and SSB6 , SSB7. There is no corresponding SSB for 110 and 111. If the value of the 3 bits occupied by the third indication information is 001, then the first SSB is SSB3.

Optionally, during the random access process, the DCI sent by the network device may carry the foregoing third indication information. After the random access is completed or in other scenarios, the DCI sent by the network device may not carry the third indication information.

S503. The network device sends a random access response to the terminal device on the beam associated with the first SSB. Correspondingly, the terminal device receives the random access response on the beam associated with the first SSB.

It should be noted that, for the execution process of step S503, reference may be made to the specific description of step S302 in FIG. 3 , which will not be repeated here.

In this embodiment of the application, the network device sends a random access response on the beam associated with the first SSB, and indicates the first SSB through the third indication information, so that the terminal device can directly receive the PDSCH on the beam associated with the first SSB, Then, the PDSCH payload is demodulated to obtain a random access response, which helps to improve the possibility that the terminal device receives the random access response, and further helps to improve the probability of successful random access.

Each of the above embodiments can be used alone or in combination with each other to achieve different technical effects.

Please refer to FIG. 6. FIG. 6 is a schematic structural diagram of a communication device provided by an embodiment of the present application. As shown in FIG. 6 , the communication device 60 includes a sending unit 601 and a receiving unit 602 . The communication device 60 may execute relevant steps of the terminal device and the network device in the foregoing method embodiments.

For the situation where the communication device 60 is used to realize the functions of the terminal equipment in the above embodiments:

A sending unit 601, configured to respectively send random access requests to network devices on at least two ROs;

a receiving unit 602, configured to receive a random access response from the network device on a beam associated with the first SSB, The first SSB is one of the SSBs associated with the at least two ROs.

In an optional implementation manner, the receiving unit 602 may also be configured to: receive first indication information from the network device, where the first indication information is used to indicate i.

In an optional implementation manner, the sending unit 601 may also be configured to: send second indication information to the network device, where the second indication information is used to indicate i.

In an optional implementation manner, when the receiving unit 602 is configured to receive the random access response from the network device on the beam associated with the first SSB, it is specifically configured to: according to the first RA-RNTI, The beam associated with the SSB receives a random access response from the network device, wherein the first RA-RNTI is determined according to the time-frequency resource position of the i-th RO.

In an optional implementation manner, the receiving unit 602 may also be configured to: receive third indication information from the network device, where the third indication information is used to indicate the first SSB.

In an optional implementation manner, when the receiving unit 602 is configured to receive the third indication information from the network device, it is specifically configured to: receive DCI from the network device, where the DCI includes the third indication information.

In an optional implementation manner, when the receiving unit 602 is configured to receive the random access response from the network device on the beam associated with the first SSB, it is specifically configured to: according to the first RA-RNTI, The random access response from the network device is received on the beam associated with the SSB; wherein, the first RA-RNTI is determined according to the time-frequency resource positions of the above-mentioned at least two ROs, or the first RA-RNTI is determined according to the above-mentioned at least two The time-frequency resource position of an RO in the RO is determined.

Specifically, in this case, for the operations performed by the sending unit 601 and the receiving unit 602, reference may be made to the introduction of the terminal device in the above embodiments corresponding to FIGS. 3-5 .

For the situation where the communication device 60 is used to implement the functions of the network equipment in the above embodiments:

A receiving unit 602, configured to respectively receive random access requests from terminal devices on at least two ROs;

The sending unit 601 is configured to send a random access response to the terminal device on a beam associated with a first SSB, where the first SSB is one of the SSBs associated with the at least two ROs.

In an optional implementation manner, the sending unit 601 may also be configured to: send first indication information to the terminal device, where the first indication information is used to indicate i.

In an optional implementation manner, the receiving unit 602 may also be configured to: receive second indication information from the terminal device, where the second indication information is used to indicate i.

In an optional implementation manner, the sending unit 601 is configured to send a message to the terminal device on the beam associated with the first SSB When sending a random access response, it is specifically used to: send a random access response to the terminal device on the beam associated with the first SSB according to the first RA-RNTI, where the first RA-RNTI is based on the i-th RO The location of the time-frequency resource is determined.

In an optional implementation manner, the sending unit 601 may also be configured to: send third indication information to the terminal device, where the third indication information is used to indicate the first SSB.

In an optional implementation manner, when the sending unit 601 is configured to send the third indication information to the terminal device, it is specifically configured to: send DCI to the terminal device, where the DCI includes the third indication information.

In an optional implementation manner, when the sending unit 601 is configured to send the random access response to the terminal device on the beam associated with the first SSB, it is specifically configured to: according to the first RA-RNTI, when the beam associated with the first SSB Send a random access response to the terminal device on the associated beam; wherein, the first RA-RNTI is determined according to the time-frequency resource positions of the at least two ROs, or the first RA-RNTI is determined according to the at least two ROs in the above-mentioned The time-frequency resource position of an RO is determined.

Specifically, in this case, for the operations performed by the sending unit 601 and the receiving unit 602, reference may be made to the introduction of network devices in the above embodiments corresponding to FIGS. 3-5 .

Please refer to FIG. 7 . FIG. 7 is another communication device 70 provided in the embodiment of the present application. It can be used to realize the functions of the terminal device in the above method embodiments, or realize the functions of the network device in the above method embodiments. The communication device 70 may include a transceiver 701 and a processor 702 . Optionally, the communication device may further include a memory 703 . Wherein, the transceiver 701, the processor 702, and the memory 703 may be connected through a bus 704 or in other ways. The bus is represented by a thick line in FIG. 7 , and the connection manners between other components are only for schematic illustration and are not limited thereto. The bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 7 , but it does not mean that there is only one bus or one type of bus.

The coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules. In the embodiment of the present application, the specific connection medium among the transceiver 701, the processor 702, and the memory 703 is not limited.

The memory 703 may include read-only memory and random-access memory, and provides instructions and data to the processor 702 . A portion of memory 703 may also include non-volatile random access memory.

The processor 702 can be a central processing unit (Central Processing Unit, CPU), and the processor 702 can also be other general processors, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC ), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor, and optionally, the processor 702 may also be any conventional processor.

In an example, when the terminal device adopts the form shown in FIG. 7 , the processor in FIG. 7 may execute the method performed by the terminal device in any of the foregoing method embodiments.

In an example, when the network device adopts the form shown in FIG. 7, the processor in FIG. 7 can execute any of the above methods The method performed by the network device in the method embodiment.

In an optional implementation manner, the memory 703 is used to store program instructions; the processor 702 is used to call the program instructions stored in the memory 703, so as to execute the terminal device, Steps performed by network devices. Specifically, the functions/implementation process of the sending unit and the receiving unit in FIG. 6 can be implemented by calling the computer-executed instructions stored in the memory 703 by the processor 702 in FIG. 7 . Alternatively, the functions/implementation process of the sending unit and the receiving unit in FIG. 5 may be implemented by the transceiver 701 in FIG. 7 .

In the embodiment of the present application, it can be performed by general-purpose computing such as a computer including CPU, random access storage medium (Random Access Memory, RAM), read-only storage medium (Read-Only Memory, ROM) and other processing elements and storage elements A computer program (including program code) capable of executing each step involved in the above method is run on the device, and the method provided by the embodiment of the present application is realized. The computer program can be recorded on, for example, a computer-readable recording medium, loaded into the above-mentioned computing device via the computer-readable recording medium, and executed therein.

Based on the same inventive concept, the problem-solving principle and beneficial effect of the communication device 70 provided in the embodiment of the application are similar to the problem-solving principle and beneficial effect of the terminal equipment and network equipment in the method embodiment of the application. Please refer to the principle of implementation of the method and beneficial effects, for brief description, no longer repeat them here.

The foregoing communication devices (such as the communication device 60 and the communication device 70 ) may be, for example, a chip or a chip module.

The embodiment of the present application also provides a chip, which can execute the relevant steps of the terminal device and the network device in the foregoing method embodiments.

For the case where the chip is used to implement the functions of the terminal device in the above embodiments:

The chip is configured to: respectively send random access requests to network devices on at least two ROs; and receive a random access response from the network device on beams associated with the first SSB, the first SSB being the same as the at least two One of the SSBs associated with ROs.

In an optional implementation manner, the SSB is associated with the ith RO among the at least two ROs, where i is a positive integer greater than or equal to 1.

In an optional implementation manner, the chip may also be configured to: receive first indication information from the network device, where the first indication information is used to indicate i.

In an optional implementation manner, the chip may also be configured to: send second indication information to the network device, where the second indication information is used to indicate i.

In an optional implementation manner, when the chip is configured to receive a random access response from a network device on a beam associated with the first SSB, it is specifically configured to: according to the first RA-RNTI, when associated with the first SSB A random access response from the network device is received on the associated beam, wherein the first RA-RNTI is determined according to the time-frequency resource position of the i-th RO.

In an optional implementation manner, the chip may also be configured to: receive third indication information from the network device, where the third indication information is used to indicate the first SSB.

In an optional implementation manner, when the chip is configured to receive the third indication information from the network device, it is specifically configured to: receive DCI from the network device, where the DCI includes the third indication information.

In an optional implementation manner, the third indication information occupies n or bits; among them, n is the same as the above The total number of SSBs associated with the at least two ROs, or n is the total number of SSBs in the serving cell of the terminal device, or n is the total number of SSBs actually used by the serving cell of the terminal device.

In an optional implementation manner, when the chip is configured to receive a random access response from a network device on a beam associated with the first SSB, it is specifically configured to: according to the first RA-RNTI, when associated with the first SSB Receive a random access response from the network device on the associated beam; wherein, the first RA-RNTI is determined according to the time-frequency resource positions of the at least two ROs above, or the first RA-RNTI is determined according to the at least two ROs above The time-frequency resource position of an RO in the RO is determined.

Specifically, in this case, for operations performed by the chip, reference may be made to the introduction of the terminal device in the embodiments corresponding to FIGS. 3-5 .

For the case where the chip is used to implement the functions of the network device in the above embodiments:

The chip is configured to: respectively receive random access requests from the terminal device on at least two ROs; and send a random access response to the terminal device on a beam associated with the first SSB, the first SSB being the same as the at least two One of the SSBs associated with ROs.

In an optional implementation manner, the chip may also be configured to: send first indication information to the terminal device, where the first indication information is used to indicate i.

In an optional implementation manner, the chip may also be configured to: receive second indication information from the terminal device, where the second indication information is used to indicate i.

In an optional implementation manner, when the chip is configured to send a random access response to the terminal device on the beam associated with the first SSB, it is specifically configured to: according to the first RA-RNTI, when associated with the first SSB A random access response is sent to the terminal device on the beam of , wherein the first RA-RNTI is determined according to the time-frequency resource position of the i-th RO.

In an optional implementation manner, the chip may also be configured to: send third indication information to the terminal device, where the third indication information is used to indicate the first SSB.

In an optional implementation manner, when the chip is configured to send the third indication information to the terminal device, it is specifically configured to: send DCI to the terminal device, where the DCI includes the third indication information.

In an optional implementation manner, when the chip is configured to send a random access response to the terminal device on the beam associated with the first SSB, it is specifically configured to: according to the first RA-RNTI, when associated with the first SSB Send a random access response to the terminal device on the beam; wherein, the first RA-RNTI is determined according to the time-frequency resource positions of the at least two ROs, or the first RA-RNTI is determined according to one of the at least two ROs The location of the time-frequency resource of the RO is determined.

Specifically, in this case, for the operations performed by the chip, reference may be made to the introduction about network devices in the embodiments corresponding to FIG. 3 to FIG. 5 .

In a possible implementation manner, the above-mentioned chip includes at least one processor, at least one first memory, and at least one second memory; wherein, the aforementioned at least one first memory and the aforementioned at least one processor are interconnected by a wire, Instructions are stored in the aforementioned first memory; the aforementioned at least one second memory and the aforementioned at least one processor are interconnected through lines, and the aforementioned second memory stores data that needs to be stored in the aforementioned method embodiments.

For each device or product applied to or integrated in the chip, each module contained therein may be implemented by means of hardware such as circuits, or at least some of the modules may be implemented by means of software programs, which run on the internal integrated components of the chip. The processor and the remaining (if any) modules can be realized by hardware such as circuits.

Please refer to FIG. 8 . FIG. 8 is a schematic structural diagram of a chip module provided by an embodiment of the present application. The chip module 80 can execute related steps of the terminal device and the network device in the foregoing method embodiments, and the chip module 80 includes: a communication interface 801 and a chip 802 .

Among them, the communication interface is used for internal communication of the chip module, or for the chip module to communicate with external devices; the chip is used to realize the functions of the terminal device and network device in the embodiment of the application, see Figure 3-figure for details 5 corresponds to the embodiment. Optionally, the chip module 80 may further include a storage module 803 and a power module 804 . The storage module 803 is used for storing data and instructions. The power supply module 804 is used to provide power for the chip module.

For each device or product applied to or integrated in a chip module, each module contained therein may be realized by hardware such as a circuit, and different modules may be located in the same component of the chip module (such as a chip, a circuit module, etc.) or Among the different components, or at least some of the modules can be realized by means of a software program, the software program runs on the processor integrated in the chip module, and the remaining (if any) parts of the modules can be realized by means of hardware such as circuits.

The embodiment of the present application also provides a computer-readable storage medium, wherein one or more instructions are stored in the computer-readable storage medium, and the one or more instructions are suitable for being loaded by a processor to execute the method provided by the above method embodiment.

The embodiment of the present application also provides a computer program product including a computer program or an instruction. When the computer program or instruction is run on a computer, the computer is made to execute the method provided by the above method embodiment.

The embodiment of the present application further provides a communication system, and the system may include the terminal device and the network device in the embodiments corresponding to FIG. 3 to FIG. 5 .

Regarding each device described in the above embodiments, each module/unit contained in the product may be a software module/unit, or a hardware module/unit, or may be partly a software module/unit and partly a hardware module/unit. . For example, for each device or product applied to or integrated in a chip, each module/unit contained therein may be realized by hardware such as a circuit, or at least some modules/units may be realized by a software program, and the software program Running on the integrated processor inside the chip, the remaining (if any) modules/units can be realized by means of hardware such as circuits; They are all realized by means of hardware such as circuits, and different modules/units can be located in the same component (such as chips, circuit modules, etc.) or different components of the chip module, or at least some modules/units can be realized by means of software programs, The software program runs on the processor integrated in the chip module, and the remaining (if any) modules/units can be realized by hardware such as circuits; /Units can be realized by means of hardware such as circuits, and different modules/units can be located in the same component (such as chips, circuit modules, etc.) or different components in the terminal, or at least some modules/units can be implemented in the form of software programs Realization, the software program runs on the processor integrated in the terminal, and the remaining (if any) modules/units can be implemented by means of hardware such as circuits.

It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are expressed as a series of However, those skilled in the art should know that the present application is not limited by the described sequence of actions, because according to the present application, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions and modules involved are not necessarily required by this application.

The steps in the methods of the embodiments of the present application can be adjusted, combined and deleted according to actual needs.

The modules in the device of the embodiment of the present application can be combined, divided and deleted according to actual needs.

Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above-mentioned embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, and the readable storage medium can be Including: flash disk, ROM, RAM, magnetic disk or optical disk, etc.

What is disclosed above is only a preferred embodiment of the present application, and only a part of the embodiments of the present application, which cannot be used to limit the scope of rights of the present application.

Claims

A communication method, characterized in that the method comprises:

The terminal device sends random access requests to the network device respectively on at least two random access occasions RO;

The terminal device receives the random access response from the network device on a beam associated with a first synchronization signal block SSB, where the first SSB is one of SSBs associated with the at least two ROs.
The method according to claim 1, wherein the first SSB is associated with the i-th RO among the at least two ROs, and the i is a positive integer greater than or equal to 1.
The method according to claim 2, further comprising:

The terminal device receives first indication information from the network device, where the first indication information is used to indicate the i.
The method according to claim 2, further comprising:

The terminal device sends second indication information to the network device, where the second indication information is used to indicate the i.
The method according to any one of claims 2-4, wherein the terminal device receives the random access response from the network device on the beam associated with the first SSB, comprising:

The terminal device receives the random access response from the network device on the beam associated with the first SSB according to the first random access radio network temporary identifier RA-RNTI, wherein the first RA-RNTI is based on The time-frequency resource position of the i-th RO is determined.
The method according to any one of claims 2-4, wherein the signal strength of the first SSB is the largest among the SSBs associated with the at least two ROs.
The method according to claim 1, further comprising:

The terminal device receives third indication information from the network device, where the third indication information is used to indicate the first SSB.
The method according to claim 7, wherein the terminal device receives the third indication information from the network device, comprising:

The terminal device receives downlink control information DCI from the network device, where the DCI includes third indication information.
The method according to claim 7 or 8, wherein the third indication information occupies n or bits; wherein, the n is the total number of SSBs associated with the at least two ROs, or,

The n is the total number of SSBs in the serving cell of the terminal device, or,

The n is the total number of SSBs actually used by the serving cell of the terminal device.
The method according to any one of claims 1-9, wherein the terminal device receives a random access response from the network device on a beam associated with the first SSB, comprising:

The terminal device receives a random access response from the network device on a beam associated with the first SSB according to the first RA-RNTI; wherein the first RA-RNTI is based on the at least two ROs The time-frequency resource position is determined, or, the first RA-RNTI is determined according to the time-frequency resource position of one RO in the at least two ROs.
A communication method, characterized in that the method comprises:

The network device respectively receives random access requests from the terminal device on at least two random access occasions RO;

The network device sends a random access response to the terminal device on a beam associated with a first synchronization signal block SSB, where the first SSB is one of SSBs associated with the at least two ROs.
The method according to claim 11, wherein the first SSB is associated with the i-th RO among the at least two ROs, and the i is a positive integer greater than or equal to 1.
The method according to claim 12, characterized in that the method further comprises:

The network device sends first indication information to the terminal device, where the first indication information is used to indicate the i.
The method according to claim 12, characterized in that the method further comprises:

The network device receives second indication information from the terminal device, where the second indication information is used to indicate the i.
The method according to any one of claims 12-14, wherein the network device sends a random access response to the terminal device on the beam associated with the first SSB, comprising:

The network device sends a random access response to the terminal device on the beam associated with the first SSB according to the first random access radio network temporary identifier RA-RNTI, where the first RA-RNTI is based on the The location of the time-frequency resource of the i-th RO is determined.
The method according to any one of claims 12-14, wherein the signal strength of the first SSB is the largest among the SSBs associated with the at least two ROs.
The method according to claim 11, characterized in that the method further comprises:

The network device sends third indication information to the terminal device, where the third indication information is used to indicate the first SSB.
The method according to claim 17, wherein the network device sends third indication information to the terminal device, comprising:

The network device sends downlink control information DCI to the terminal device, where the DCI includes third indication information.
The method according to claim 17 or 18, wherein the third indication information occupies n or bits; wherein, the n is the total number of SSBs associated with the at least two ROs, or,

The n is the total number of SSBs in the serving cell of the terminal device, or,

The n is the total number of SSBs actually used by the serving cell of the terminal device.
The method according to any one of claims 11-19, wherein the network device sends a random access response to the terminal device on a beam associated with the first SSB, including:

The network device sends a random access response to the terminal device on the beam associated with the first SSB according to the first RA-RNTI; wherein the first RA-RNTI is based on the timing of the at least two ROs The frequency resource position is determined, or the first RA-RNTI is determined according to the time-frequency resource position of one RO in the at least two ROs.
A communication device, characterized in that the device includes a sending unit and a receiving unit;

The sending unit is configured to respectively send random access requests to network devices on at least two random access occasions RO;

The receiving unit is configured to receive a random access response from the network device on a beam associated with a first synchronization signal block SSB, where the first SSB is one of the SSBs associated with the at least two ROs SSB.
A communication device, characterized in that the device includes a receiving unit and a sending unit;

The receiving unit is configured to respectively receive random access requests from terminal devices on at least two random access occasions RO;

The sending unit is configured to send a random access response to the terminal device on a beam associated with a first synchronization signal block SSB, where the first SSB is one of the SSBs associated with the at least two ROs .
A communication device, characterized by comprising a processor;

The processor is configured to execute the method according to any one of claims 1-20.
A chip, characterized in that,

The chip is used for:

Send random access requests to the network device respectively on at least two random access occasions RO;

A random access response from the network device is received on a beam associated with a first synchronization signal block SSB, the first SSB being one of the SSBs associated with the at least two ROs.
A chip, characterized in that,

The chip is used for:

Respectively receive random access requests from the terminal device on at least two random access occasions RO;

sending a random access response to the terminal device on a beam associated with a first synchronization signal block SSB, the first SSB being one of the SSBs associated with the at least two ROs.
A chip module, characterized in that the chip module includes a communication interface and a chip, wherein:

The communication interface is used for internal communication of the chip module, or for communication between the chip module and external equipment;

The chip is used for:

Send random access requests to the network device respectively on at least two random access occasions RO;

A random access response from the network device is received on a beam associated with a first synchronization signal block SSB, the first SSB being one of the SSBs associated with the at least two ROs.
A chip module, characterized in that the chip module includes a communication interface and a chip, wherein:

The communication interface is used for internal communication of the chip module, or for communication between the chip module and external equipment;

The chip is used for:

Respectively receive random access requests from the terminal device on at least two random access occasions RO;

sending a random access response to the terminal device on a beam associated with a first synchronization signal block SSB, the first SSB being one of the SSBs associated with the at least two ROs.