CN113647133A

CN113647133A - Method and equipment for sending and receiving feedback information

Info

Publication number: CN113647133A
Application number: CN201980095095.0A
Authority: CN
Inventors: 徐伟杰; 徐婧; 吴作敏; 贺传峰; 王淑坤; 田文强; 石聪
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2021-11-12
Anticipated expiration: 2039-09-30
Also published as: WO2021062760A1; CN113647133B

Abstract

A method and apparatus for transmitting and receiving feedback information are provided. The method for sending the feedback information comprises the following steps: receiving a Media Access Control (MAC) Protocol Data Unit (PDU); wherein the MAC PDU comprises a plurality of MAC sub-PDUs; determining a Physical Uplink Control Channel (PUCCH) resource corresponding to each MAC sub-PDU in a plurality of PUCCH resources according to the sequence of the MAC sub-PDUs; and sending the feedback information of the same MAC sub-PDU on the PUCCH resource of each MAC sub-PDU in the plurality of MAC sub-PDUs. By sending the feedback information of the MAC sub-PDU to the network equipment, the network can know that the terminal does not successfully receive the RAR response message, so that the network equipment can try to resend the RAR response message to the terminal, and the signaling overhead, the power consumption and the time delay can be reduced.

Description

Method and equipment for sending and receiving feedback information

Technical Field

The embodiment of the application relates to the field of communication, and more particularly, to a method and device for sending and receiving feedback information.

Background

In the 2-step RACH process, after the terminal equipment sends msgA, the terminal monitors RAR response messages in an RAR window. There may be msgA that the network successfully receives and sends RAR to the terminal in msgB, but the terminal does not successfully receive the RAR response information. For this situation, in the related art, the terminal device needs to retransmit the msgA to the network device, so that the network device sends an RAR to the terminal device.

However, terminal devices retransmitting msgA to network devices increases signaling overhead, power consumption, and latency.

Disclosure of Invention

A method and a device for sending and receiving feedback information are provided, which can reduce signaling overhead, power consumption and time delay.

In a first aspect, a method for sending feedback information is provided, including:

receiving a Media Access Control (MAC) Protocol Data Unit (PDU); wherein the MAC PDU comprises a plurality of MAC sub-PDUs;

determining a Physical Uplink Control Channel (PUCCH) resource corresponding to each MAC sub-PDU in a plurality of PUCCH resources according to the sequence of the MAC sub-PDUs;

and sending the feedback information of the same MAC sub-PDU on the PUCCH resource of each MAC sub-PDU in the plurality of MAC sub-PDUs.

In a second aspect, a method for sending feedback information is provided, including:

determining a Physical Uplink Control Channel (PUCCH) resource corresponding to each MAC sub-PDU in the plurality of MAC sub-PDUs according to the first information and the first mapping relation; wherein the first mapping relation comprises a mapping relation between at least one PUCCH resource and at least one information, the at least one information comprises the first information, and the first information comprises a preamble used by message A and/or a PUSCH resource used by message A;

In a third aspect, a method for receiving feedback information is provided, including:

sending a Media Access Control (MAC) Protocol Data Unit (PDU); wherein the MAC PDU comprises a plurality of MAC sub-PDUs;

and receiving the feedback information of the same MAC sub-PDU on the PUCCH resource of each of the plurality of MAC sub-PDUs.

In a fourth aspect, a method for receiving feedback information is provided, including:

In a fifth aspect, a terminal device is provided, configured to perform the method in any one of the first aspect to the second aspect or each implementation manner thereof. Specifically, the terminal device includes a functional module configured to execute the method in any one of the first aspect to the second aspect or each implementation manner thereof.

A sixth aspect provides a network device configured to perform the method of any one of the third to fourth aspects or implementations thereof. Specifically, the network device includes a functional module configured to execute the method in any one of the third aspect to the fourth aspect or each implementation manner thereof.

In a seventh aspect, a terminal device is provided that includes a processor and a memory. The memory is configured to store a computer program, and the processor is configured to call and execute the computer program stored in the memory to perform the method in any one of the first aspect to the second aspect or each implementation manner thereof.

In an eighth aspect, a network device is provided that includes a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the method in any one of the third aspect to the fourth aspect or each implementation manner thereof.

In a ninth aspect, there is provided a chip for implementing the method in any one of the first to fourth aspects or implementations thereof. Specifically, the chip includes: a processor, configured to call and run a computer program from a memory, so that a device in which the chip is installed performs the method in any one of the first to fourth aspects or the implementation manners thereof.

A tenth aspect provides a computer-readable storage medium for storing a computer program, the computer program causing a computer to perform the method of any one of the first to fourth aspects or implementations thereof.

In an eleventh aspect, there is provided a computer program product comprising computer program instructions to cause a computer to perform the method of any one of the first to fourth aspects or implementations thereof.

In a twelfth aspect, there is provided a computer program which, when run on a computer, causes the computer to perform the method of any one of the first to fourth aspects or implementations thereof.

Based on the technical scheme, the network can know that the terminal does not successfully receive the RAR response message by sending the feedback information of the MAC sub-PDU to the network equipment, so that the terminal can try to resend the RAR response message to the terminal, thereby avoiding the terminal equipment from resending the msgA to the network equipment, and further reducing signaling overhead, power consumption and time delay.

Drawings

Fig. 1 is an example of an application scenario of the present application.

Fig. 2 is a schematic flow chart of a 4-step random access procedure of an embodiment of the present application.

Fig. 3 is a schematic block diagram of a MAC PDU of an embodiment of the present application.

Fig. 4 is a schematic block diagram of a MAC RAR of an embodiment of the application.

Fig. 5 is a schematic flow chart of a 2-step random access procedure of an embodiment of the present application.

Fig. 6 is a schematic flow chart of a method of transmitting or receiving feedback information according to an embodiment of the present application.

Fig. 7 to 10 are schematic block diagrams of a relationship between MAC sub-PDUs and PUCCH resources according to an embodiment of the present application.

Fig. 11 is a schematic block diagram of a terminal device according to an embodiment of the present application.

Fig. 12 is a schematic block diagram of a network device of an embodiment of the present application.

Fig. 13 is a schematic block diagram of a communication device of an embodiment of the present application.

Fig. 14 is a schematic block diagram of a chip of an embodiment of the present application.

Detailed Description

Technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Fig. 1 is a schematic diagram of an application scenario of an embodiment of the present application.

As shown in fig. 1, communication system 100 may include a terminal device 110 and a network device 120. Network device 120 may communicate with terminal device 110 over the air. Multi-service transport is supported between terminal device 110 and network device 120.

It should be understood that the embodiment of the present application is only illustrated as the communication system 100, but the embodiment of the present application is not limited thereto. That is to say, the technical solution of the embodiment of the present application can be applied to various communication systems, for example: a Long Term Evolution (LTE) System, a Time Division Duplex (TDD) System, a Universal Mobile Telecommunications System (UMTS), a 5G communication System (also referred to as a New Radio (NR) communication System), a future communication System, or the like.

In communication system 100 shown in fig. 1, network device 120 may be an access network device that communicates with terminal device 110. An access network device may provide communication coverage for a particular geographic area and may communicate with terminal devices 110 (e.g., UEs) located within the coverage area.

The Network device 120 may be an evolved Node B (eNB or eNodeB) in a Long Term Evolution (Long Term Evolution, LTE) system, or a Next Generation Radio Access Network (NG RAN) device, or a base station (gNB) in an NR system, or a wireless controller in a Cloud Radio Access Network (CRAN), or the Network device 120 may be a relay station, an Access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, or a Network device in a Public Land Mobile Network (PLMN) for future Evolution, or the like.

Terminal device 110 may be any terminal device including, but not limited to, terminal devices that employ wired or wireless connections with network device 120 or other terminal devices.

For example, the terminal device 110 may refer to an access terminal, User Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, User terminal, wireless communication device, User agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device having Wireless communication capabilities, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolution network, etc.

The terminal Device 110 may be used for Device-to-Device (D2D) communication.

The wireless communication system 100 may further include a Core network device 130 in communication with the base station, where the Core network device 130 may be a 5G Core (5G Core, 5GC) device, such as an Access and Mobility Management Function (AMF), an Authentication Server Function (AUSF), a User Plane Function (UPF), and a Session Management Function (SMF). Alternatively, the Core network device 130 may also be an Evolved Packet Core (EPC) device of the LTE network, for example, a Session Management Function + Core Packet Gateway (SMF + PGW-C) device of the Core network. It is understood that SMF + PGW-C may perform the functions that SMF and PGW-C can perform simultaneously. In the network evolution process, the core network device may also be called by other names, or a new network entity is formed by dividing the functions of the core network, which is not limited in this embodiment of the present application.

Communication between the functional units in the communication system 100 may also be implemented by establishing a connection through a next generation Network (NG) interface.

For example, the terminal device establishes an air interface connection with the access network device through the NR interface, and is used to transmit user plane data and control plane signaling; the terminal equipment can establish control plane signaling connection with the AMF through an NG interface 1 (N1 for short); the access network equipment, such as a next generation radio access base station (gNB), can establish a user plane data connection with the UPF through an NG interface 3 (N3 for short); the access network equipment can establish a control plane signaling connection with the AMF through an NG interface 2 (N2 for short); the UPF can establish a control plane signaling connection with the SMF through an NG interface 4 (N4 for short); the UPF may interact with the data network via NG interface 6 (abbreviated N6); the AMF can establish a control plane signaling connection with the SMF through an NG interface 11 (N11 for short); the SMF may establish a control plane signaling connection with the PCF via NG interface 7 (abbreviated N7).

Fig. 1 exemplarily shows one base station, one core network device, and two terminal devices, and optionally, the wireless communication system 100 may include a plurality of base station devices and may include other numbers of terminal devices within the coverage area of each base station, which is not limited in this embodiment of the present application.

It should be understood that, in the embodiments of the present application, devices having a communication function in a network/system may be referred to as communication devices. Taking the communication system 100 shown in fig. 1 as an example, the communication device may include a network device 120 and a terminal device 110 having a communication function, and the network device 120 and the terminal device 110 may be the devices described above and are not described herein again; the communication device may also include other devices in the communication system 100, such as other network entities, for example, a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In some embodiments of the present application, the communication system may be an NR system.

In other words, the communication system 100 may be used to perform a 4-step random access procedure.

For example, after the cell search procedure, the terminal device has acquired downlink synchronization with the cell, and therefore the terminal device can receive downlink data. However, the terminal device can perform uplink transmission only if it acquires uplink synchronization with the cell. The terminal device establishes a connection with the cell through a Random Access Procedure (Random Access Procedure) and acquires uplink synchronization.

The main purpose of random access is: (1) obtaining uplink synchronization; (2) and allocating a unique identifier C-RNTI for the terminal equipment.

The random access procedure may be triggered by one of the following 6 types of events:

1. establishing wireless connection during initial access: the terminal device goes from the RRC _ IDLE state to the RRC _ CONNECTED state.

RRC Connection reestablishment procedure (RRC Connection Re-estimation procedure): so that the terminal device can reestablish the wireless connection after the wireless Link Failure (Radio Link Failure).

3. Handover (handover): at this time, the terminal device needs to establish uplink synchronization with the new cell.

And 4, under the RRC _ CONNECTED state, when downlink data arrives (ACK/NACK needs to be replied at the moment), the uplink is in an 'asynchronous' state.

And 5, in the RRC _ CONNECTED state, when uplink data arrives (for example, measurement report needs to be reported or user data needs to be sent), the uplink is in an "out-of-sync" state or there is no available PUCCH resource for SR transmission (at this time, the terminal device already in the uplink synchronization state is allowed to use RACH to replace SR).

And 6, in the RRC _ CONNECTED state, timing advance is needed for positioning the terminal equipment.

As shown in fig. 2, the 4-step random access procedure 200 may include:

s210, the terminal device sends a random access preamble sequence (message 1, MSG1) to the network device.

S220, after detecting that the terminal device sends the access preamble sequence, the network device sends a random access response (RAR, that is, message 2, MSG2) to the terminal device to notify the terminal device of uplink resource information that can be used when sending MSG3(message 3, MSG3), allocates a temporary RNTI to the terminal device, provides TA command and the like for the terminal device, if the terminal device does not detect RAR in the RAR window, the terminal device retransmits the PRACH sequence, and if the terminal device detects RAR in the RAR window, the terminal device transmits MSG3 according to the UL grant indicated by RAR.

S230, after receiving the random access response RAR, the terminal equipment sends an MSG3 message in the uplink resource appointed by the random access response message, and the step allows HARQ retransmission;

s240, the network device sends MSG4 message to the terminal device, where the message includes contention resolution message, and allocates uplink transmission resource for the terminal device, and this step allows HARQ retransmission. When the terminal device receives the MSG4 sent by the network device, it will detect whether the MSG4 includes part of the content in the MSG3 message sent by the terminal device. If the random access procedure is successful, the terminal equipment is judged, otherwise, the random access procedure is considered to be failed, and the terminal equipment needs to initiate the random access procedure from the first step again.

In the process 200, an RAR sent by the network device to the terminal device is a response for the Msg1, an RA-RNTI used when the network device sends the RAR is calculated according to a position of a time-frequency resource of a PRACH, and a PDSCH corresponding to a PDCCH scrambled by one RA-RNTI may include responses for a plurality of preamble sequences.

For example, the fact that the terminal device does not detect RAR includes the following cases:

1. no PDCCH with RA-RNTI scrambling codes detected.

2. The PDCCH scrambled by the RA-RNTI is detected but the corresponding PDSCH is not correctly received.

3. The PDSCH is received but the RAR message corresponding to the MSG1 is not included in the PDSCH.

The detection of the RAR by the terminal equipment can mean that the terminal equipment correctly receives the PDSCH scheduled by the PDCCH of the RA-RNTI scrambling code according to the RA-RNTI calculated by the time-frequency resource position of the MSG1 in the RAR window, and the PDSCH comprises RAR information corresponding to the MSG 1.

The terminal equipment detects a PDCCH scrambled by an RA-RNTI and detects a PDSCH scheduled by the PDCCH; the PDSCH comprises at least one RAR message, wherein one RAR message is a response to a preamble sequence sent by the terminal equipment; each RAR message comprises information such as leader sequence ID, TA, UL grant, TC-RNTI and the like; the UL grant includes the following scheduling information: frequency domain hopping flag, frequency domain resource allocation, time domain resource allocation, MCS, TPC, CSI request and other information.

And if the RAR is detected in the RAR window, the terminal equipment transmits the Msg3 according to the UL grant included in the RAR message. The window length of the RAR time window is represented by the number of time slots, the length can be configured by high-level signaling ra-responseWindow, and the time slot length is determined for the reference subcarrier based on the subcarrier interval of the Type1-PDCCH common search space set. The RAR time window starts from Type1-PDCCH CSS set configured for the terminal, the terminal after at least one symbol after the last symbol of the PRACH occase where the terminal sends the PRACH receives CORESET with the earliest PDCCH time position, and the symbol length of the at least one symbol corresponds to the subcarrier interval of Type1-PDCCH CSS set.

As shown in fig. 3, a Media Access Control (MAC) Protocol Data Unit (PDU) may include a plurality of MAC sub-PDUs (MAC sub-PDUs) and padding (padding) bits, if any.

For example, MAC subpDU 1 may belong to the E/T/R/R/BI subheader. The MAC subpDU following the E/T/R/R/BI subheader may belong to the E/T/RAPID subheader. The MAC sub-pdu in the E/T/R/BI subheader may only include RAPID, or may include RAPID and the corresponding MAC Random Access Response (RAR) at the same time. For example, MAC subPDU 2 includes only RAPID, and MAC subPDU 3 includes both RAPID and corresponding RAR.

In other words, 1 MAC PDU may include 1 or more MAC RARs.

As can be seen from the structure of the MAC PDU, if the network device detects random access requests from multiple terminal devices on the same PRACH resource, one MAC PDU may be used to respond to the access requests, and the response of each random access request (corresponding to one preamble index) corresponds to one RAR. In other words, if multiple terminal devices transmit preamble on the same PRACH resource (same time-frequency location, using the same RA-RNTI), the corresponding RARs are multiplexed in the same MAC PDU.

The MAC PDU is transmitted on the DL-SCH and is scheduled through the PDCCH scrambled with the RA-RNTI.

In other words, all terminal devices that use the same PRACH resource to transmit preamble (not necessarily the same) monitor the PDCCH scrambled by the same RA-RNTI and receive the same MAC PDU, but the terminal devices that use different preamble indexes can find the corresponding RAR according to the corresponding RAPID value.

The fallback indication (BI) subheader may include one extension field (extension, E), one type field (type, T), two reserved fields (reserved, R), and a BI value.

The Random Access sequence Identifier (RAPID) subheader may include an E, a T, and RAPID values.

The Random Access Preamble Identifier (RAPID Identifier) is a Preamble index obtained when the network device detects a Preamble. And if the terminal equipment finds that the value is the same as the index used when the terminal equipment sends the preamble, the terminal equipment considers that the corresponding RAR is successfully received.

As shown in fig. 4, the MAC RAR may include a reserved bit R, a Time Alignment Command (TAC), an uplink grant (UL grant), and a Temporary Cell Radio Network Temporary Identifier (TC-RNTI).

The Time Alignment Command (TAC) is used to specify a time adjustment amount required for uplink synchronization of the terminal device, and may occupy 12 bits. The UL grant specifies the uplink resources allocated to Msg 3. When there is uplink data transmission, for example, collision needs to be resolved, the grant allocated by the network device in the RAR cannot be smaller than 56 bits. The TC-RNTI is used for subsequent transmission of the terminal equipment and the network equipment. After conflict resolution, the value may become C-RNIT.

In the transmission process of the MSG3 in the four-step RACH procedure, the RV version number used for MSG3 transmission scheduled by the UL grant in the RAR is 0, and if the network device fails to receive MSG3, the network device may schedule retransmission of MSG3 using DCI format 0_0 scrambled by the TC-RNTI.

The DCI format 0_0 of the TC-RNTI scrambling code may include the following:

uplink and downlink DCI indication (1 bit), frequency domain resource allocation (the size is determined according to UL BWP bandwidth), time domain resource allocation (4 bits), frequency domain frequency hopping indication (1 bit), MCS (5 bits), new data indication (1 bit reservation), RV version (2 bits), HARQ process number (4 bit reservation), PUSCH power control command word (2 bits) and UL/SUL carrier indication (1 bit).

In the transmission process of the MSG4 in the four-step RACH process, the terminal device performs PUCCH feedback after receiving MSG4, and if the decoding result received by the terminal device for MSG4 is NACK, the network device performs HARQ retransmission for MSG 4. The network device may schedule initial transmission or retransmission of the MSG4 using the C-RNTI or DCI format 1_0 of the TC-RNTI scrambling code. If the terminal equipment receives the DCI format 1_0 scrambled by the C-RNTI and the corresponding PDSCH, the random access is completed; and if the terminal equipment receives the DCI format 1_0 scrambled by the TC-RNTI and the corresponding PDSCH thereof, and the content comparison is successful, the random access is completed.

The DCI format 1_0 of the TC-RNTI scrambling code can comprise the following contents:

uplink and downlink DCI indication (1 bit), frequency domain resource allocation (the size is determined according to DL BWP bandwidth), time domain resource allocation (4 bits), VRB to PRB mapping (1 bit), MCS (5 bits), new data indication (1 bit), RV version (2 bits), HARQ process number (4 bits), downlink allocation indication DAI (2 bit reservation), PUCCH power control command word (2 bits), PUCCH resource indication (3 bits), and PDSCH-to-HARQ feedback time indication (3 bits).

In the four-step RACH process, the time delay is large, so that the method is not suitable for a low-time-delay high-reliability scene in 5G. In consideration of the characteristics of low-delay and high-reliability related services, the communication system can use a scheme of two-step RACH (random access channel) process to reduce access delay.

Fig. 5 is a schematic flow diagram of a two-step RACH procedure 300 of an embodiment of the present application.

As shown in fig. 5, the two-step RACH procedure 300 may include:

s310, the terminal device sends msgA to the network device, wherein the msgA can contain msg1 and msg3 of 4-step RACH. .

And S320, the terminal equipment receives the msgB sent by the network equipment, wherein the msgB can contain msg2 and msg4 of the 4-step RACH.

In other words, the first and third steps in the 4-step RACH procedure are combined into the first step in the 2-step RACH procedure (message A), and the second and fourth steps of the 4-step RACH are combined into the second step in the 2-step RACH procedure (message B).

Therefore, in the first step in the 2-step RACH procedure, the terminal device needs to transmit preamble and PUSCH.

For example, for msgA, it may contain preamble and uplink data part (e.g. carried via PUSCH), where the uplink data part carries identification information of the terminal device and/or the reason for the RRC request (i.e. equivalent to the content of existing MSG 3); the msgB may include conflict resolution information, TA information, C-RNTI assignment information, and the like, that is, a combination of partial information equivalent to existing MSG2 and MSG4 information.

In the 2-step RACH process, when a terminal has a random access requirement, the terminal sends MsgA on the MsgA resources, namely RACH occupancy and PUSCH occupancy, corresponding to the 2-step RACH process which appears in a period configured by a network. Then, the terminal listens for an RAR message (msgB) sent by the network within the RAR response window.

The start time position of the RAR response window is set in a similar manner as in the 4-step RACH, starting from CSS set (e.g., Type1-PDCCH CSS set) configured for the terminal, and the terminal receives the CORESET with the earliest PDCCH time position at least M symbols after the last symbol (e.g., PUSCH opportunity) of msgA is transmitted by the terminal, and the symbol length of the at least M symbols corresponds to the subcarrier interval of Type1-PDCCH CSS set, where M is an integer greater than 0.

The msgB RAR response message in the 2-step RACH procedure may also carry response messages for multiple msgA sent by multiple terminal devices.

For example, the following types of messages can be classified:

successful rar (success rar): if the network equipment successfully receives preamble and PUSCH information in msgA, the terminal feeds back a success RAR, wherein TA command, C-RNTI, conflict resolution ID and the like can be carried;

fallback rar (fallback rar): if the network device successfully detects the preamble part in the terminal msgA but does not receive the correct PUSCH part, the network may send a fallback rar to the terminal, so that the terminal may fall back to the conventional 4-step RACH procedure, and after receiving the fallback rar, the terminal sends msg3 to the network.

Certainly, the msgB RAR response message may also carry other information, such as a Backoff indicator, for indicating how to adjust a time parameter for retransmitting the msgA under a condition that the terminal does not receive the RAR response message.

However, in the 2-step RACH procedure, after the terminal device transmits msgA, the terminal listens for an RAR response message within an RAR window. There may be msgA that the network successfully received the terminal sent and RAR response was sent to the terminal in msgB, but the terminal did not successfully receive the RAR response. For such a situation, the terminal device needs to retransmit the msgA to the network device, thereby increasing signaling overhead, power consumption, and time delay.

Based on the above problems, the invention provides a RAR group feedback method of msgB.

By sending the feedback information of the MAC sub-PDU to the network equipment, the network can know that the terminal does not successfully receive the RAR response message, so that the terminal can try to resend the RAR response message to the terminal, thereby avoiding the terminal equipment resending msgA to the network equipment, and further reducing signaling overhead, power consumption and time delay.

Fig. 6 shows a schematic flow chart of a method 400 for a terminal device to send feedback information or a network device to receive feedback information according to an embodiment of the present application, where the method 400 may be performed interactively by the terminal device and the network device. The terminal device shown in fig. 6 may be a terminal device as shown in fig. 1, and the network device shown in fig. 6 may be an access network device as shown in fig. 1.

As shown in fig. 6, the method 400 includes some or all of the following:

s410, the terminal equipment receives a Media Access Control (MAC) Protocol Data Unit (PDU); wherein the MAC PDU comprises a plurality of MAC sub-PDUs.

S421, the terminal device determines, in the plurality of PUCCH resources, a Physical Uplink Control Channel (PUCCH) resource corresponding to each MAC sub-PDU of the plurality of MAC sub-PDUs according to the sequence of the plurality of MAC sub-PDUs.

S430, the terminal equipment sends the feedback information of the same MAC sub-PDU on the PUCCH resource of each MAC sub-PDU in the plurality of MAC sub-PDUs.

For example, the terminal device determines a resource carrying feedback information of the target RAR message based on a position of a MAC sub-PDU (e.g., a sub-PDU corresponding to the success RAR message or the failure back RAR message) to which the target RAR message belongs in the MAC PDU. The resource carrying the feedback information of the target RAR message may be a PUCCH resource.

In some embodiments of the present application, the MAC sub-PDUs include a MAC sub-PDU carrying a fallback random access response RAR and a MAC sub-PDU carrying a successful RAR.

In other words, the terminal device may feed back both the MAC sub-PDU carrying the fallback random access response RAR and the MAC sub-PDU carrying the successful RAR. Or, the MAC sub-PDU to be fed back in the MAC PDU includes a MAC sub-PDU carrying a fallback RAR and a MAC sub-PDU carrying a successful RAR. Alternatively, the RARs to be fed back may include successful RARs and fallback RARs.

The plurality of MAC sub-PDUs only include MAC sub-PDUs carrying successful RARs.

In other words, the terminal device may only feed back MAC sub-PDUs carrying successful RARs. Or, the MAC sub-PDU to be fed back only includes the MAC sub-PDU carrying the successful RAR. Alternatively, the RAR to be fed back may include only a successful RAR.

In some embodiments of the present application, the plurality of MAC sub-PDUs are partial MAC sub-PDUs in the MAC PDU.

For example, the MAC PDU may include a MAC sub-PDU in an E/T/R/BI sub-header and/or a MAC sub-PDU including only a RAPID in addition to the plurality of MAC sub-PDUs.

In other words, the terminal device may feed back a part of the MAC sub-PDUs (i.e. MAC sub-PDUs to be fed back) in the MAC PDU. Or, the MAC sub-PDU to be fed back may be a part of the MAC sub-PDU in the MAC PDU.

In some embodiments of the present application, PUCCH resources corresponding to the multiple MAC sub-PDUs are consecutive PUCCH resources in the multiple PUCCH resources.

For example, the resources corresponding to the MAC sub-PDUs correspond to the PUCCH resources one to one. For another example, the resources corresponding to the MAC sub-PDUs and the PUCCH resources may be in a one-to-many or many-to-one relationship.

At this time, the terminal device may determine, among the plurality of PUCCH resources arranged in the first order, an ith PUCCH resource as a corresponding PUCCH resource of an ith MAC sub-PDU of the plurality of MAC sub-PDUs arranged in the second order, where i is a non-negative integer.

The first sequence is the sequence of the resource numbers from large to small or from small to large, and the second sequence is the sequence of the MAC sub-PDUs from front to back or from back to front in the MAC PDUs.

In other words, the MAC sub-PDUs to be fed back are mapped to the PUCCH resources one by one according to the positions of the MAC sub-PDUs in the MAC sub-PDUs and the sequence of the resource numbers.

For example, the terminal device may determine the plurality of PUCCH resources arranged in the order of the resource numbers from small to large as PUCCH resources corresponding to the plurality of MAC sub-PDUs arranged in the order from front to back, respectively.

For another example, the terminal device may determine the plurality of PUCCH resources arranged in the order of ascending resource number as PUCCH resources corresponding to the plurality of MAC sub-PDUs arranged in the order of descending order.

For another example, the terminal device may determine the plurality of PUCCH resources arranged in descending order of resource number as PUCCH resources corresponding to the plurality of MAC sub-PDUs arranged in ascending order of resource number.

For another example, the terminal device may determine the plurality of PUCCH resources arranged in the descending order of resource numbers as PUCCH resources corresponding to the plurality of MAC sub-PDUs arranged in the descending order of resource numbers.

In other words, the terminal device may determine the plurality of PUCCH resources arranged in order as corresponding PUCCH resources of the plurality of MAC sub-PDUs arranged in order, respectively.

Taking fig. 7 as an example, it is assumed that n MAC sub-PDUs carrying the RAR message are carried in the MAC PDU, and each MAC sub-PDU includes a preamble response; in addition, the network device may configure n PUCCH feedback resources to the terminal.

For each MAC sub-PDU, the terminal device may determine, based on a position of the same MAC sub-PDU in the MAC PDU, a PUCCH feedback resource corresponding to the same MAC sub-PDU among the n PUCCH feedback resources. For example, the MAC PDU is located in the MAC sub-PDU of the 1 st according to the bit sequence, and corresponds to the PUCCH feedback resource numbered 1 among the n PUCCH feedback resources; the MAC sub-PDU with the number of 2 in the MAC PDU corresponds to the PUCCH feedback resource with the number of 2 in the n PUCCH feedback resources according to the bit sequence 2; by analogy, the nth MAC sub-PDU in the MAC PDU corresponds to the PUCCH feedback resource numbered n in the n PUCCH feedback resources according to the bit sequence.

Thus, after receiving the msgB, the terminal can determine whether there is an RAR for msgA information transmitted by itself in RARs in the MAC sub-PDUs (by checking preamble index and content resolution ID in the RAR), and determine the PUCCH resource number of each MAC sub-PDU based on the order of a plurality of MAC sub-PDUs in the msgB.

The following describes an implementation manner in which the terminal device determines the PUCCH resource of the MAC sub-PDU when the MAC sub-PDUs only include the MAC sub-PDU carrying the successful RAR.

In some embodiments of the present application, a part of the MAC PDUs except for the first MAC sub-PDU and the second MAC sub-PDU may include a MAC sub-PDU carrying successful RAR, and another part of the MAC sub-PDU may include a MAC sub-PDU carrying fallback RAR.

At this time, the terminal device may only feed back the MAC sub-PDU carrying the successful RAR.

In other words, when the MAC PDU carries the fallback RAR and the success RAR, since the terminal sends msg3 after receiving the fallback RAR, the network can indirectly determine whether the terminal receives the fallback RAR message based on whether the terminal receives the msg3 sent by the terminal, and therefore, for the fallback RAR, the terminal does not need to perform HARQ-ACK feedback. Or, the terminal device may determine the resource carrying the feedback information based on the sequence of the MAC sub-PDUs to which the success RAR message in the msgB belongs.

Taking fig. 8 as an example, it is assumed that n MAC sub-PDUs carrying the RAR message are carried in the MAC PDU, and each MAC sub-PDU includes a preamble response; in addition, the network device may configure n PUCCH feedback resources to the terminal.

For each success RAR, the terminal device may determine a PUCCH resource index based on the location of the success RAR in all success RARs. For example, the MAC PDU is located at success RAR of 1 st according to the bit sequence, and corresponds to PUCCH feedback resources numbered 1 among n PUCCH feedback resources; the success RAR in the MAC PDU corresponds to the PUCCH feedback resource numbered 2 in the n PUCCH feedback resources according to the bit sequence 2; by analogy, the MAC PDU corresponds to the PUCCH feedback resource numbered n from the n PUCCH feedback resources according to the success RAR in the bit sequence n.

By mapping the PUCCH resources only for the success RAR, the utilization rate of the PUCCH resources can be improved because the fallback RAR does not need feedback.

In some embodiments of the present application, PUCCH resources corresponding to the multiple MAC sub-PDUs are non-consecutive PUCCH resources among the multiple PUCCH resources. For example, the PUCCH resources corresponding to two adjacent MAC sub-PDUs in the plurality of MAC sub-PDUs are two PUCCH resources separated by one or more PUCCH resources, respectively.

The third sequence is the sequence of the resource numbers from large to small or from small to large, and the fourth sequence is the sequence of the MAC sub-PDUs from front to back or from back to front in the MAC PDUs.

For example, the terminal device may determine, among the plurality of PUCCH resources arranged in the third order, an M × i-th PUCCH resource as a corresponding PUCCH resource of an i-th MAC sub-PDU of the plurality of MAC sub-PDUs arranged in the fourth order;

wherein M is a PUCCH resource between two PUCCH resources corresponding to two adjacent MAC sub-PDUs in the plurality of MAC sub-PDUs arranged in the fourth order, M is a positive integer, and i is a non-negative integer.

Taking fig. 9 as an example, it is assumed that the MAC PDU of the RAR response message includes sub-PDUs (i.e., the multiple MAC sub-PDUs) carrying n RAR messages, and each sub-PDU includes a preamble response; in addition, the network equipment can configure 2n-1 PUCCH feedback resources to the terminal.

For each MAC sub-PDU, the terminal device may determine a PUCCH feedback resource corresponding to the same MAC sub-PDU from among the 2n-1 PUCCH feedback resources based on the position of the same MAC sub-PDU in the MAC PDU. For example, the MAC sub-PDU in the MAC PDU according to bit sequence 1 corresponds to PUCCH feedback resources numbered 1 in 2n-1 PUCCH feedback resources; the MAC sub-PDU of the 2 nd MAC sub-PDU in the MAC PDU corresponds to the PUCCH feedback resource numbered 3 in the 2n-1 PUCCH feedback resources; the MAC sub-PDU with the number of 5 in the M PUCCH feedback resources corresponds to the MAC sub-PDU with the 3 rd bit sequence in the MAC PDU; by analogy, the MAC sub-PDU with the nth bit sequence in the MAC PDU corresponds to the PUCCH feedback resource with the number of 2n-1 in the 2n-1 PUCCH feedback resources.

In other words, two adjacent PUCCH resources corresponding to two 2n-1 are separated by one PUCCH resource, or the two adjacent PUCCH resources corresponding to two 2n-1 have a resource number separation of 2.

As an example, in the case that M × i ≦ N, the terminal device determines, among the plurality of PUCCH resources arranged in the third order, the M × i-th PUCCH resource as a corresponding PUCCH resource of an i-th MAC sub-PDU among the plurality of MAC sub-PDUs arranged in the fourth order;

and N is the number of the PUCCHs.

As another example, in the case where M × i > N, the terminal device may determine, of the plurality of PUCCH resources arranged in the third order, an M × i + k-th PUCCH resource as a corresponding PUCCH resource of an i-th MAC sub-PDU of the plurality of MAC sub-PDUs arranged in the fourth order, where k is a positive integer less than M.

Wherein k-1 represents that the corresponding PUCCH resource of the MAC sub-PDU is cyclically determined in the plurality of PUCCH resources arranged in the third order at the k-th time.

In other words, the MAC sub-PDUs may be sequentially mapped with PUCCH resources numbered M × i one by one according to the position order; if the MAC sub-PDU does not have the corresponding PUCCH resource, the rest MAC sub-PDUs are mapped with the resource with the number Mi +1 one by one according to the sequence; and analogizing until all the MAC sub-PDUs have corresponding PUCCH resources. Wherein M is a positive integer and i is a non-negative integer.

The MAC sub-PDUs are mapped to PUCCH resources numbered M x i one by one according to the position sequence, so that the MAC sub-PDUs are guaranteed to have definite PUCCH feedback resources, discontinuous mapping can be guaranteed, sufficient cyclic shift intervals can be guaranteed among the PUCCH resources, and the PUCCH performance is improved. For example, in a cyclic discontinuous mapping manner, PUCCH performance may be improved when the number of the MAC sub-PDUs is small, and as many PUCCH resources as possible may be provided when the number of the MAC sub-PDUs is large.

The MAC PDU transmitted in one slot in RAR window of msgB may only carry MAC sub-PDUs of several users. When the number of the plurality of PUCCH resources is large, how to fully utilize one PUCCH resource set PUCCH resource is to perform feedback for MAC sub-PDUs transmitted in a plurality of slots, which is a further problem to be solved.

In some embodiments of the present application, the plurality of PUCCH resources include multiple sets of PUCCH resources, and one set of PUCCH resources in the multiple sets of PUCCH resources is a PUCCH resource corresponding to a MAC sub-PDU in one slot of the multiple slots. For example, the plurality of sets of PUCCH resources and the plurality of slots correspond one to one. Of course, the multiple sets of PUCCHs may also have a one-to-many or many-to-one relationship with the multiple slots.

For example, the multiple sets of PUCCH resources include a first set of PUCCH resources and a second set of PUCCH resources, where the first set of PUCCH resources are PUCCH resources corresponding to MAC sub-PDUs in odd-numbered slots, and the second set of PUCCH resources are PUCCH resources corresponding to MAC sub-PDUs in even-numbered slots.

At this time, the method 400 may further include:

and receiving back-off timing indication information, wherein the back-off timing indication information is used for timing PUCCH resources corresponding to MAC sub-PDUs in odd-numbered slots to the first group of PUCCH resources and timing PUCCH resources corresponding to MAC sub-PDUs in even-numbered slots to the second group of PUCCH resources.

In other words, the plurality of PUCCH resources are divided into a plurality of sets of PUCCH resources. And different groups of PUCCH resources respectively bear feedback information of MAC sub-PDUs in msgB of different time slots.

For example, the plurality of PUCCH resources may be one PUCCH resource set (resource set). For example, the first PUCCH resource set may include 16 or other number of PUCCH resources. At this time, PUCCH resources in one PUCCH resource set may be divided into multiple sets of PUCCH resources. And one group of PUCCH resources in the multiple groups of PUCCH resources are PUCCH resources corresponding to MAC sub-PDU in one time slot of multiple time slots. The multiple sets of PUCCH resources may also be referred to as multiple PUCCH resource subsets. Wherein each set of PUCCH resources (i.e., each PUCCH resource subset) may include one or more PUCCH resources.

For example, a first set of PUCCH resources is used to carry feedback information of MAC sub-PDUs of odd slots in RAR window; and carrying feedback information of the MAC sub-PDU of the even time slot in the RAR window by using the first group of PUCCH resources. Further, by setting a suitable DCI middle-domain value PDSCH-to-HARQ _ feedback timing indicator for scheduling the PDSCH carrying the RAR message, the RAR in the odd slot and the RAR in the even slot both correspond to the same PUCCH resource set.

By feeding back the MAC sub-PDUs of different time slots in the same PUCCH resource set, the utilization rate of PUCCH resources can be effectively improved under the condition that the number of RARs in each time slot msgB is small.

In some embodiments of the present application, the method 400 may further comprise:

the terminal device determines the plurality of PUCCH resources.

For example, before S421, the terminal device determines the plurality of PUCCH resources, so that the terminal device determines, from the plurality of PUCCH resources, a PUCCH resource corresponding to each of the plurality of MAC sub-PDUs.

the terminal device receives first information.

The first information is used for configuring the plurality of PUCCH resources for the terminal equipment.

For example, the first information configures the plurality of PUCCH resources for the terminal device through system information or radio resource control RRC dedicated signaling.

In other words, the network device may configure a PUCCH resource dedicated for RAR feedback for the 2-step RACH procedure, and when the terminal device needs to feed back the feedback information of the MAC sub-PDU, the terminal device may directly send the feedback information of the MAC sub-PDU on the configured PUCCH resource.

In other embodiments of the present application, the method 400 may further comprise:

and the terminal equipment receives second information, wherein the second information is used for configuring PUCCH resources for 4-step random access for the terminal equipment.

At this time, the terminal device may determine the plurality of PUCCH resources among the PUCCH resources for 4-step random access.

In other words, PUCCH resources for the 2-step RACH RAR may be reserved among PUCCH resources of the 4-step RACH; the terminal device may use the PUCCH resource other than the reserved resource among the resources configured for PUCCH-resource common for HARQ feedback for 4-step RACH msg 4. Further, the terminal device may perform feedback on the PUCCH resource for the 2-step RACH msgB, which is among the resources configured for PUCCH-resource common and is a reserved resource, based on the transmission condition of the 2-step RACH RAR response message.

and the terminal equipment receives third information, wherein the third information is used for indicating the positions of the plurality of PUCCH resources in the PUCCH resources for 4-step random access.

For example, the third information indicates, through a physical uplink control channel resource indication PRI in a random access response RAR or a higher layer signaling, positions of the plurality of PUCCH resources in the PUCCH resources for 4-step random access.

In other words, a PUCCH resource available for the 2-step RACH RAR is indicated among PUCCH resources configured in PUCCH-resource common, for example, a starting point of a resource number of a PUCCH resource used for 2-step RACH RAR feedback is indicated. The terminal may perform feedback of msgB in PUCCH resources after the PUCCH resource number start point.

For example, the following may be employed:

PRI in multiplexing (Reuse) DCI: since PRI in the scheduling RAR is not necessarily used, a PUCCH Resource Indication (PRI) field value in the PDCCH DCI of the multiplexing scheduling msgB may indicate the positions of the plurality of PUCCH resources in the PUCCH resource for 4-step random access. For example, the PRI domain value has 3 bits, and different bit values may indicate the starting point of the resource number of different PUCCH resources, for example, 000 indicates that the starting point is 4, and 011 indicates that the starting point is 8.

And (3) high-layer signaling indication: a higher layer signaling may be employed to indicate the starting point of the resource number of the PUCCH resource used by the 2-step RACH RAR feedback.

In some embodiments of the present application, the terminal device may determine the plurality of PUCCH resources among the PUCCH resources for 4-step random access without receiving information for configuring the plurality of PUCCH resources.

In other words, if the terminal receives additional configuration information for configuring the PUCCH resources, the configured PUCCH resources are used, otherwise (if the terminal does not receive additional configuration information for configuring the PUCCH resources, that is, there is no relevant configuration information in the system information), the plurality of PUCCH resources are determined among the PUCCH resources for 4-step random access.

The utilization rate of PUCCH resources can be improved by sharing the PUCCH resources through the 2-step RACH and the 4-step RACH; meanwhile, the 2-step RACH can provide sufficient PUCCH resources by adopting the special PUCCH resources. The combination of the two combines the above advantages while providing flexibility in network configuration.

In some embodiments of the present application, each of the plurality of MAC sub-PDUs corresponds to one of the plurality of PUCCH resources.

The above description is about the implementation manner in which the terminal device determines the PUCCH resource corresponding to each of the MAC sub-PDUs based on the MAC sub-PDUs, but the embodiment of the present invention is not limited thereto.

For example, the terminal device may also determine a PUCCH resource corresponding to each of the plurality of MAC sub-PDUs based on other information.

In some embodiments of the present application, the terminal device receives a MAC PDU; wherein the MAC PDU comprises a plurality of MAC sub-PDUs; the terminal equipment determines PUCCH resources corresponding to each MAC sub-PDU in the multiple MAC sub-PDUs according to the first information and the first mapping relation; and the terminal equipment sends the feedback information of the same MAC sub-PDU on the PUCCH resource of each MAC sub-PDU in the plurality of MAC sub-PDUs.

Wherein the first mapping relationship comprises a mapping relationship between at least one PUCCH resource and at least one information, the at least one information comprises the first information, and the first information comprises a preamble used by message A and/or a PUSCH resource used by message A. For example, the PUSCH resources used by the message a may include the number of the PUSCH resources used by the message a and/or the number of the PUSCH demodulation reference signal DMRS used by the message a.

In other words, a mapping relationship between preamble or PUSCH resources (including PUSCH resource number; PUSCH DMRS number, etc.) in msgA and PUCCH resources fed back by msgB can be established. Because the RAR in the msgB carries preamble index information of msgA sent by the terminal, when the terminal feeds back for the RAR response message, the terminal may select preamble or PUSCH resource information based on msgA, and determine to be used for the msgB to feed back the PUCCH resource.

Wherein, the time position (k1) of the PUCCH resource used by the 2-step RACH indicates the PDSCH-to-HARQ-timing-indicator using DCI 1-0, or the high layer signaling configuration or the predefined k 1.

In some embodiments of the present application, the method further comprises:

receiving configuration information;

the configuration information is used for configuring the first mapping relation for the terminal equipment.

Through the first mapping relationship, the PUCCH resources corresponding to each of the MAC sub-PDUs determined by the network device and the terminal device may be kept consistent.

The preferred embodiments of the present application have been described in detail with reference to the accompanying drawings, however, the present application is not limited to the details of the above embodiments, and various simple modifications can be made to the technical solution of the present application within the technical idea of the present application, and these simple modifications are all within the protection scope of the present application.

For example, the various features described in the foregoing detailed description may be combined in any suitable manner without contradiction, and various combinations that may be possible are not described in this application in order to avoid unnecessary repetition.

For example, various embodiments of the present application may be arbitrarily combined with each other, and the same should be considered as the disclosure of the present application as long as the concept of the present application is not violated.

It should be understood that, in the various method embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

The method for transmitting feedback information according to the embodiment of the present application is described in detail from the perspective of the terminal device in the above with reference to fig. 6 to 10, and the method for receiving feedback information according to the embodiment of the present application will be described from the perspective of the network device in the following with reference to fig. 6.

As shown in fig. 6, the method 400 includes:

s410, the network equipment sends a Media Access Control (MAC) Protocol Data Unit (PDU); wherein the MAC PDU comprises a plurality of MAC sub-PDUs.

S422, the network device determines the physical uplink control channel PUCCH resource corresponding to each MAC sub-PDU in the MAC sub-PDUs in a plurality of PUCCH resources according to the sequence of the MAC sub-PDUs.

S430, the network device receives the feedback information of the same MAC sub-PDU on the PUCCH resource of each of the MAC sub-PDUs.

In some embodiments of the present application, the MAC sub-PDUs include only MAC sub-PDUs carrying successful RARs.

In some embodiments of the present application, the resources corresponding to the plurality of MAC sub-PDUs correspond to the plurality of PUCCH resources one to one.

In some embodiments of the present application, the network device determines, among the plurality of PUCCH resources arranged in the first order, an ith PUCCH resource as a corresponding PUCCH resource of an ith MAC sub-PDU of the plurality of MAC sub-PDUs arranged in the second order, where i is a non-negative integer.

In some embodiments of the present application, the first order is an order of resource numbers from large to small or from small to large, and the second order is an order of MAC sub-PDUs from front to back or from back to front in a MAC PDU.

In some embodiments of the present application, PUCCH resources corresponding to the multiple MAC sub-PDUs are non-consecutive PUCCH resources among the multiple PUCCH resources.

In some embodiments of the present application, PUCCH resources corresponding to two adjacent MAC sub-PDUs in the plurality of MAC sub-PDUs are two PUCCH resources spaced by one or more PUCCH resources, respectively.

In some embodiments of the present application, the network device determines, among the plurality of PUCCH resources arranged in the third order, an M × i PUCCH resource as a corresponding PUCCH resource of an i MAC sub-PDU of the plurality of MAC sub-PDUs arranged in the fourth order;

In some embodiments of the present application, the network device determines, in the case that M × i ≦ N, the M × i-th PUCCH resource as a corresponding PUCCH resource of an i-th MAC sub-PDU of the plurality of MAC sub-PDUs arranged in the fourth order, among the plurality of PUCCH resources arranged in the third order;

and N is the number of the PUCCHs.

and the network device determines, in the case that M × i > N, an M × i + k-th PUCCH resource among the plurality of PUCCH resources arranged in the third order as a corresponding PUCCH resource of an i-th MAC sub-PDU among the plurality of MAC sub-PDUs arranged in the fourth order, where k is a positive integer smaller than M.

In some embodiments of the present application, the third order is an order from large to small or from small to large of the resource numbers, and the fourth order is an order from front to back or from back to front in the MAC PDU of the MAC sub-PDUs.

In some embodiments of the present application, the plurality of PUCCH resources include multiple sets of PUCCH resources, and one set of PUCCH resources in the multiple sets of PUCCH resources is a PUCCH resource corresponding to a MAC sub-PDU in one slot of the multiple slots.

In some embodiments of the present application, the plurality of sets of PUCCH resources and the plurality of slots correspond one to one.

In some embodiments of the present application, the multiple sets of PUCCH resources include a first set of PUCCH resources and a second set of PUCCH resources, where the first set of PUCCH resources are PUCCH resources corresponding to MAC sub-PDUs in slots with odd numbers, and the second set of PUCCH resources are PUCCH resources corresponding to MAC sub-PDUs in slots with even numbers.

and the network equipment sends back timing indication information, wherein the back timing indication information is used for timing PUCCH resources corresponding to MAC sub-PDUs in odd-numbered slots to the first group of PUCCH resources and timing PUCCH resources corresponding to MAC sub-PDUs in even-numbered slots to the second group of PUCCH resources.

the network device determines the plurality of PUCCH resources.

the network equipment sends first information; the first information is used for configuring the plurality of PUCCH resources for the terminal equipment.

In some embodiments of the present application, the first information configures the plurality of PUCCH resources for the terminal device through system information or radio resource control, RRC, dedicated signaling.

and the network equipment sends second information, wherein the second information is used for configuring PUCCH resources for 4-step random access for the terminal equipment.

Further, the network device determines the plurality of PUCCH resources among the PUCCH resources for 4-step random access.

the network device transmits third information indicating positions of the plurality of PUCCH resources in the PUCCH resources for 4-step random access.

In some embodiments of the present application, the third information indicates, through a physical uplink control channel resource indication PRI or a higher layer signaling in a random access response RAR, locations of the plurality of PUCCH resources in the PUCCH resources for 4-step random access.

In some embodiments of the present application, the plurality of PUCCH resources are determined among the PUCCH resources for 4-step random access without transmitting information for configuring the plurality of PUCCH resources.

In some embodiments of the present application, the method is applied to a 2-step random access procedure.

In other embodiments of the present application, the network device sends a medium access control, MAC, protocol data unit, PDU; wherein the MAC PDU comprises a plurality of MAC sub-PDUs; the network equipment determines a Physical Uplink Control Channel (PUCCH) resource corresponding to each MAC sub-PDU in the multiple MAC sub-PDUs according to the first information and the first mapping relation; wherein the first mapping relation comprises a mapping relation between at least one PUCCH resource and at least one information, the at least one information comprises the first information, and the first information comprises a preamble used by message A and/or a PUSCH resource used by message A; and the network equipment receives the feedback information of the same MAC sub-PDU on the PUCCH resource of each MAC sub-PDU in the plurality of MAC sub-PDUs.

In some embodiments of the present application, the network device sends configuration information; the configuration information is used for configuring the first mapping relation for the terminal equipment.

In some embodiments of the present application, the PUSCH resources used by the message a include the number of PUSCH resources used by the message a and/or the number of PUSCH demodulation reference signals, DMRS, used by the message a.

It should be understood that, for the sake of brevity, details are not repeated herein, and the specific implementation manner of the network side determining the physical uplink control channel PUCCH resource corresponding to each MAC sub-PDU may refer to corresponding steps in the terminal side.

Method embodiments of the present application are described in detail above in conjunction with fig. 1-10, and apparatus embodiments of the present application are described in detail below in conjunction with fig. 11-14.

Fig. 11 is a schematic block diagram of a terminal device 500 according to an embodiment of the present application.

As shown in fig. 11, in some embodiments of the present application, the terminal device 500 may include:

a communication unit 510, configured to receive a media access control MAC protocol data unit PDU; wherein the MAC PDU comprises a plurality of MAC sub-PDUs;

a processing unit 520, configured to determine, in multiple PUCCH resources, a physical uplink control channel PUCCH resource corresponding to each MAC sub-PDU in the multiple MAC sub-PDUs according to the sequence of the multiple MAC sub-PDUs;

the communication unit 510 is further configured to send feedback information of the same MAC sub-PDU on a PUCCH resource of each of the multiple MAC sub-PDUs.

In some embodiments of the present application, the processing unit 520 is specifically configured to:

determining an ith PUCCH resource as a corresponding PUCCH resource of an ith MAC sub-PDU in the plurality of MAC sub-PDUs arranged according to a second order in the plurality of PUCCH resources arranged according to the first order, wherein i is a non-negative integer.

determining an M x i-th PUCCH resource as a PUCCH resource corresponding to an i-th MAC sub-PDU in the plurality of MAC sub-PDUs arranged according to a fourth sequence from the plurality of PUCCH resources arranged according to the third sequence;

In some embodiments of the present application, the processing unit 520 is more specifically configured to:

determining the Mxi-th PUCCH resource as a corresponding PUCCH resource of the ith MAC sub-PDU in the plurality of MAC sub-PDUs arranged in the fourth order in the plurality of PUCCH resources arranged in the third order under the condition that the M x i is not more than N;

and N is the number of the PUCCHs.

In some embodiments of the present application, the processing unit 520 is further configured to:

and when M × i > N, determining, from the plurality of PUCCH resources arranged in the third order, an M × i + k-th PUCCH resource as a corresponding PUCCH resource of an i-th MAC sub-PDU from the plurality of MAC sub-PDUs arranged in the fourth order, where k is a positive integer smaller than M.

In some embodiments of the present application, the communication unit 510 is further configured to:

determining the plurality of PUCCH resources.

receiving first information;

receiving second information, wherein the second information is used for configuring PUCCH resources for 4-step random access for terminal equipment;

wherein the processing unit 520 is specifically configured to:

determining the plurality of PUCCH resources among the PUCCH resources for 4-step random access.

receiving third information indicating positions of the plurality of PUCCH resources in the PUCCH resources for 4-step random access.

determining the plurality of PUCCH resources among the PUCCH resources for 4-step random access without receiving information for configuring the plurality of PUCCH resources.

In some embodiments of the present application, the terminal device is applied to a 2-step random access procedure.

As shown in fig. 11, in other embodiments of the present application, the terminal device 500 may include:

a processing unit 520, configured to determine, according to the first information and the first mapping relationship, a physical uplink control channel PUCCH resource corresponding to each MAC sub-PDU in the multiple MAC sub-PDUs; wherein the first mapping relation comprises a mapping relation between at least one PUCCH resource and at least one information, the at least one information comprises the first information, and the first information comprises a preamble used by message A and/or a PUSCH resource used by message A;

receiving configuration information;

It is to be understood that apparatus embodiments and method embodiments may correspond to one another and that similar descriptions may refer to method embodiments. Specifically, the terminal device 500 shown in fig. 11 may correspond to a corresponding main body in executing the method 400 in the embodiment of the present application, and the foregoing and other operations and/or functions of each unit in the terminal device 500 are respectively for implementing corresponding flows in each method in fig. 6, and are not described herein again for brevity.

Fig. 12 is a schematic block diagram of a network device 600 according to an embodiment of the present application.

As shown in fig. 12, in some embodiments of the present application, the network device 600 may include:

a communication unit 610, configured to send a media access control MAC protocol data unit PDU; wherein the MAC PDU comprises a plurality of MAC sub-PDUs;

a processing unit 620, configured to determine, in multiple PUCCH resources, a physical uplink control channel PUCCH resource corresponding to each MAC sub-PDU of the multiple MAC sub-PDUs according to the sequence of the multiple MAC sub-PDUs;

the communication unit 610 is further configured to receive feedback information of the same MAC sub-PDU on a PUCCH resource of each of the multiple MAC sub-PDUs.

In some embodiments of the present application, the processing unit 620 is specifically configured to:

In some embodiments of the present application, the processing unit 620 is more specifically configured to:

and N is the number of the PUCCHs.

In some embodiments of the present application, the processing unit 620 is further configured to:

In some embodiments of the present application, the communication unit 610 is further configured to:

and sending back-off timing indication information, wherein the back-off timing indication information is used for timing PUCCH resources corresponding to MAC sub-PDUs in odd-numbered slots to the first group of PUCCH resources and timing PUCCH resources corresponding to MAC sub-PDUs in even-numbered slots to the second group of PUCCH resources.

determining the plurality of PUCCH resources.

sending first information;

sending second information, wherein the second information is used for configuring PUCCH resources for 4-step random access for terminal equipment;

wherein the processing unit 620 is specifically configured to:

transmitting third information for indicating positions of the plurality of PUCCH resources in the PUCCH resources for 4-step random access.

determining the plurality of PUCCH resources among the PUCCH resources for 4-step random access without transmitting information for configuring the plurality of PUCCH resources.

In some embodiments of the present application, the network device is applied to a 2-step random access procedure.

As shown in fig. 12, in other embodiments of the present application, the network device 600 may include:

a processing unit 620, configured to determine, according to the first information and the first mapping relationship, a physical uplink control channel PUCCH resource corresponding to each MAC sub-PDU in the multiple MAC sub-PDUs; wherein the first mapping relation comprises a mapping relation between at least one PUCCH resource and at least one information, the at least one information comprises the first information, and the first information comprises a preamble used by message A and/or a PUSCH resource used by message A;

sending configuration information;

It is to be understood that apparatus embodiments and method embodiments may correspond to one another and that similar descriptions may refer to method embodiments. Specifically, the network device 600 shown in fig. 12 may correspond to a corresponding main body in executing the method 400 in the embodiment of the present application, and the foregoing and other operations and/or functions of each unit in the network device 600 are respectively for implementing corresponding flows in each method in fig. 6, and are not described herein again for brevity.

The communication device of the embodiments of the present application is described above in connection with the drawings from the perspective of functional modules. It should be understood that the functional modules may be implemented by hardware, by instructions in software, or by a combination of hardware and software modules.

Specifically, the steps of the method embodiments in the present application may be implemented by integrated logic circuits of hardware in a processor and/or instructions in the form of software, and the steps of the method disclosed in conjunction with the embodiments in the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor.

Alternatively, the software modules may be located in random access memory, flash memory, read only memory, programmable read only memory, electrically erasable programmable memory, registers, and the like, as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps in the above method embodiments in combination with hardware thereof.

For example, the processing unit and the communication unit referred to above may be implemented by a processor and a transceiver, respectively.

Fig. 13 is a schematic configuration diagram of a communication apparatus 700 according to an embodiment of the present application.

Referring to fig. 13, the communication device 700 may include a processor 710.

From which processor 710 may invoke and execute a computer program to implement the methods of the embodiments of the present application.

With continued reference to fig. 13, the communication device 700 may also include a memory 720.

The memory 720 may be used for storing indication information, and may also be used for storing codes, instructions, etc. executed by the processor 710. From the memory 720, the processor 710 can call and run a computer program to implement the method in the embodiment of the present application. The memory 720 may be a separate device from the processor 710 or may be integrated into the processor 710.

With continued reference to fig. 13, the communication device 700 may also include a transceiver 730.

The processor 710 may control the transceiver 730 to communicate with other devices, and in particular, may transmit information or data to the other devices or receive information or data transmitted by the other devices. The transceiver 730 may include a transmitter and a receiver. The transceiver 730 may further include an antenna, and the number of antennas may be one or more.

It should be understood that the various components in the communication device 700 are connected by a bus system that includes a power bus, a control bus, and a status signal bus in addition to a data bus.

It should also be understood that the communication device 700 may be a terminal device in the embodiment of the present application, and the communication device 700 may implement a corresponding process implemented by the terminal device in each method in the embodiment of the present application, that is, the communication device 700 in the embodiment of the present application may correspond to the terminal device 500 in the embodiment of the present application, and may correspond to a corresponding main body in executing the method 200 in the embodiment of the present application, and for brevity, no further description is provided here. Similarly, the communication device 700 may be a network device according to the embodiment of the present application, and the communication device 700 may implement the corresponding processes implemented by the network device in the methods according to the embodiments of the present application. That is to say, the communication device 700 in the embodiment of the present application may correspond to the network device 600 in the embodiment of the present application, and may correspond to a corresponding main body in executing the method 200 according to the embodiment of the present application, and for brevity, no further description is provided here.

In addition, the embodiment of the application also provides a chip.

For example, the chip may be an integrated circuit chip having signal processing capabilities and capable of implementing or executing the methods, steps and logic blocks disclosed in the embodiments of the present application. The chip may also be referred to as a system-on-chip, a system-on-chip or a system-on-chip, etc. Alternatively, the chip may be applied to various communication devices, so that the communication device mounted with the chip can execute the methods, steps and logic blocks disclosed in the embodiments of the present application.

Fig. 14 is a schematic block diagram of a chip 800 according to an embodiment of the present application.

Referring to fig. 14, the chip 800 includes a processor 810.

From which processor 810 may retrieve and execute a computer program to implement the methods of the embodiments of the present application.

With continued reference to fig. 14, the chip 800 may further include a memory 820.

From the memory 820, the processor 810 can call and run a computer program to implement the method in the embodiment of the present application. The memory 820 may be used to store instructions and codes, instructions, etc. that may be executed by the processor 810. The memory 820 may be a separate device from the processor 810 or may be integrated into the processor 810.

With continued reference to fig. 14, the chip 800 may further include an input interface 830.

The processor 810 may control the input interface 830 to communicate with other devices or chips, and specifically, may obtain information or data transmitted by other devices or chips.

With continued reference to fig. 14, the chip 800 may further include an output interface 840.

The processor 810 can control the output interface 840 to communicate with other devices or chips, and in particular, can output information or data to other devices or chips.

It should be understood that the chip 800 may be applied to a network device in this embodiment, and the chip may implement a corresponding process implemented by the network device in each method in this embodiment, and may also implement a corresponding process implemented by a terminal device in each method in this embodiment, which is not described herein again for brevity.

It will also be appreciated that the various components in the chip 800 are connected by a bus system that includes a power bus, a control bus, and a status signal bus in addition to a data bus.

The processor may include, but is not limited to:

general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, and the like.

The processor may be configured to implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, eprom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

The memory includes, but is not limited to:

volatile memory and/or non-volatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (DDR SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DR RAM).

It should be noted that the memory described herein is intended to comprise these and any other suitable types of memory.

The embodiment of the application also provides a computer readable storage medium for storing the computer program. The computer readable storage medium stores one or more programs, the one or more programs comprising instructions, which when executed by a portable electronic device comprising a plurality of application programs, enable the portable electronic device to perform the method of the illustrated embodiment of method 400.

Optionally, the computer-readable storage medium may be applied to the network device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the network device in each method in the embodiment of the present application, which is not described herein again for brevity.

Optionally, the computer-readable storage medium may be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein again for brevity.

The embodiment of the application also provides a computer program product comprising the computer program.

Optionally, the computer program product may be applied to the network device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the network device in each method in the embodiment of the present application, which is not described herein again for brevity.

Optionally, the computer program product may be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein again for brevity.

The embodiment of the application also provides a computer program. The computer program, when executed by a computer, enables the computer to perform the methods of the illustrated embodiments of method 400.

Optionally, the computer program may be applied to the network device in the embodiment of the present application, and when the computer program runs on a computer, the computer is enabled to execute the corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, details are not described here again.

In addition, an embodiment of the present application further provides a communication system, where the communication system may include the terminal device and the network device mentioned above to form the communication system 100 shown in fig. 1, and details are not described herein for brevity. It should be noted that the term "system" and the like herein may also be referred to as "network management architecture" or "network system" and the like.

It is also to be understood that the terminology used in the embodiments of the present application and the appended claims is for the purpose of describing particular embodiments only, and is not intended to be limiting of the embodiments of the present application.

For example, as used in the examples of this application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

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

If implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially implemented or make a contribution to the prior art, or may be implemented in the form of a software product stored in a storage medium and including several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: u disk, removable hard disk, read only memory, random access memory, magnetic or optical disk, etc. for storing program codes.

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

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways.

For example, the division of a unit or a module or a component in the above-described device embodiments is only one logical function division, and there may be other divisions in actual implementation, for example, a plurality of units or modules or components may be combined or may be integrated into another system, or some units or modules or components may be omitted, or not executed.

Also for example, the units/modules/components described above as separate/display components may or may not be physically separate, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the units/modules/components can be selected according to actual needs to achieve the purposes of the embodiments of the present application.

Finally, it should be noted that the above shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The above description is only a specific implementation of the embodiments of the present application, but the scope of the embodiments of the present application is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the embodiments of the present application, and all the changes or substitutions should be covered by the scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application shall be subject to the protection scope of the claims.

Claims

A method for transmitting feedback information, comprising:

receiving a Media Access Control (MAC) Protocol Data Unit (PDU); wherein the MAC PDU comprises a plurality of MAC sub-PDUs;

determining a Physical Uplink Control Channel (PUCCH) resource corresponding to each MAC sub-PDU in a plurality of PUCCH resources according to the sequence of the MAC sub-PDUs;

and sending the feedback information of the same MAC sub-PDU on the PUCCH resource of each MAC sub-PDU in the plurality of MAC sub-PDUs.
The method according to claim 1, wherein the plurality of MAC sub-PDUs comprises a MAC sub-PDU carrying a fallback random access response, RAR, and a MAC sub-PDU carrying a successful RAR.
The method of claim 1, wherein the plurality of MAC sub-PDUs only includes MAC sub-PDUs carrying successful RARs.
The method according to any of claims 1 to 3, wherein the plurality of MAC sub-PDUs are partial MAC sub-PDUs of the MAC PDUs.
The method according to any of claims 1-4, wherein the PUCCH resources corresponding to the plurality of MAC sub-PDUs are consecutive PUCCH resources of the plurality of PUCCH resources.
The method of claim 5, wherein the resources corresponding to the plurality of MAC sub-PDUs correspond one-to-one to the plurality of PUCCH resources.
The method according to claim 5 or 6, wherein the determining the physical uplink control channel PUCCH resource corresponding to each of the plurality of MAC sub-PDUs according to the order of the plurality of MAC sub-PDUs comprises:

determining an ith PUCCH resource as a corresponding PUCCH resource of an ith MAC sub-PDU in the plurality of MAC sub-PDUs arranged according to a second order in the plurality of PUCCH resources arranged according to the first order, wherein i is a non-negative integer.
The method of claim 7, wherein the first order is a resource number from big to small or from small to big, and the second order is a MAC sub-PDU from front to back or from back to front in a MAC PDU.
The method according to any of claims 1-4, wherein the PUCCH resources corresponding to the plurality of MAC sub-PDUs are non-consecutive PUCCH resources of the plurality of PUCCH resources.
The method of claim 9, wherein the PUCCH resources corresponding to two adjacent MAC sub-PDUs in the plurality of MAC sub-PDUs are two PUCCH resources separated by one or more PUCCH resources.
The method according to claim 9 or 10, wherein the determining the physical uplink control channel PUCCH resource corresponding to each of the plurality of MAC sub-PDUs according to the order of the plurality of MAC sub-PDUs comprises:

determining an M x i-th PUCCH resource as a PUCCH resource corresponding to an i-th MAC sub-PDU in the plurality of MAC sub-PDUs arranged according to a fourth sequence from the plurality of PUCCH resources arranged according to the third sequence;

wherein M is a PUCCH resource between two PUCCH resources corresponding to two adjacent MAC sub-PDUs in the plurality of MAC sub-PDUs arranged in the fourth order, M is a positive integer, and i is a non-negative integer.
The method of claim 11, wherein the determining the M x i-th PUCCH resource among the plurality of PUCCH resources arranged in the third order as the corresponding PUCCH resource of the i-th MAC sub-PDU among the plurality of MAC sub-PDUs arranged in the fourth order comprises:

determining the Mxi-th PUCCH resource as a corresponding PUCCH resource of the ith MAC sub-PDU in the plurality of MAC sub-PDUs arranged in the fourth order in the plurality of PUCCH resources arranged in the third order under the condition that the M x i is not more than N;

and N is the number of the PUCCHs.
The method of claim 12, further comprising:

and when M × i > N, determining, from the plurality of PUCCH resources arranged in the third order, an M × i + k-th PUCCH resource as a corresponding PUCCH resource of an i-th MAC sub-PDU from the plurality of MAC sub-PDUs arranged in the fourth order, where k is a positive integer smaller than M.
The method according to any of claims 11 to 13, wherein the third order is a big-to-small or a small-to-big order of resource numbers, and the fourth order is a front-to-back or a back-to-front order of MAC sub-PDUs in a MAC PDU.
The method according to any of claims 1-4, wherein the plurality of PUCCH resources comprises multiple sets of PUCCH resources, and wherein one of the multiple sets of PUCCH resources is a PUCCH resource corresponding to a MAC sub-PDU in one of multiple slots.
The method of claim 15, wherein the plurality of sets of PUCCH resources and the plurality of slots have a one-to-one correspondence.
The method according to claim 15 or 16, wherein the plurality of sets of PUCCH resources include a first set of PUCCH resources corresponding to MAC sub-PDUs in odd-numbered slots and a second set of PUCCH resources corresponding to MAC sub-PDUs in even-numbered slots.
The method of claim 17, further comprising:

and receiving back-off timing indication information, wherein the back-off timing indication information is used for timing PUCCH resources corresponding to MAC sub-PDUs in odd-numbered slots to the first group of PUCCH resources and timing PUCCH resources corresponding to MAC sub-PDUs in even-numbered slots to the second group of PUCCH resources.
The method according to any one of claims 1 to 18, further comprising:

determining the plurality of PUCCH resources.
The method of claim 19, further comprising:

receiving first information;

the first information is used for configuring the plurality of PUCCH resources for the terminal equipment.
The method of claim 20, wherein the first information configures the plurality of PUCCH resources for the terminal device via system information or radio resource control, RRC, dedicated signaling.
The method according to any one of claims 19 to 21, further comprising:

receiving second information, wherein the second information is used for configuring PUCCH resources for 4-step random access for terminal equipment;

wherein the determining the plurality of PUCCH resources comprises:

determining the plurality of PUCCH resources among the PUCCH resources for 4-step random access.
The method of claim 22, further comprising:

receiving third information indicating positions of the plurality of PUCCH resources in the PUCCH resources for 4-step random access.
The method according to claim 23, wherein the third information indicates the location of the plurality of PUCCH resources in the PUCCH resources for 4-step random access by means of physical uplink control channel resource indication PRI or higher layer signaling in a random access response, RAR.
The method according to claim 23 or 24, wherein the determining the plurality of PUCCH resources among the PUCCH resources for 4-step random access comprises:

determining the plurality of PUCCH resources among the PUCCH resources for 4-step random access without receiving information for configuring the plurality of PUCCH resources.
The method of any of claims 1-25, wherein each of the plurality of MAC sub-PDUs corresponds to one of the plurality of PUCCH resources.
The method according to any of claims 1 to 26, wherein the method is applied to a 2-step random access procedure.
A method for transmitting feedback information, comprising:

receiving a Media Access Control (MAC) Protocol Data Unit (PDU); wherein the MAC PDU comprises a plurality of MAC sub-PDUs;

determining a Physical Uplink Control Channel (PUCCH) resource corresponding to each MAC sub-PDU in the plurality of MAC sub-PDUs according to the first information and the first mapping relation; wherein the first mapping relation comprises a mapping relation between at least one PUCCH resource and at least one information, the at least one information comprises the first information, and the first information comprises a preamble used by message A and/or a PUSCH resource used by message A;

and sending the feedback information of the same MAC sub-PDU on the PUCCH resource of each MAC sub-PDU in the plurality of MAC sub-PDUs.
The method of claim 28, further comprising:

receiving configuration information;

the configuration information is used for configuring the first mapping relation for the terminal equipment.
The method according to claim 28 or 29, wherein the PUSCH resources used by the message a comprise the number of PUSCH resources used by the message a and/or the number of PUSCH demodulation reference signals, DMRS, used by the message a.
A method of receiving feedback information, comprising:

sending a Media Access Control (MAC) Protocol Data Unit (PDU); wherein the MAC PDU comprises a plurality of MAC sub-PDUs;

determining a Physical Uplink Control Channel (PUCCH) resource corresponding to each MAC sub-PDU in a plurality of PUCCH resources according to the sequence of the MAC sub-PDUs;

and receiving the feedback information of the same MAC sub-PDU on the PUCCH resource of each of the plurality of MAC sub-PDUs.
The method according to claim 31, wherein the plurality of MAC sub-PDUs comprises a MAC sub-PDU carrying a fallback random access response, RAR, and a MAC sub-PDU carrying a successful RAR.
The method of claim 31, wherein the plurality of MAC sub-PDUs comprises only MAC sub-PDUs carrying successful RARs.
The method according to any of claims 31-33, wherein said plurality of MAC sub-PDUs are partial MAC sub-PDUs of said MAC PDU.
The method according to any of claims 31-34, wherein the PUCCH resources for the plurality of MAC sub-PDUs are consecutive PUCCH resources of the plurality of PUCCH resources.
The method of claim 35, wherein the plurality of MAC sub-PDUs correspond to resources that are in a one-to-one correspondence with the plurality of PUCCH resources.
The method according to claim 35 or 36, wherein the determining the physical uplink control channel PUCCH resource corresponding to each of the plurality of MAC sub-PDUs according to the order of the plurality of MAC sub-PDUs comprises:

determining an ith PUCCH resource as a corresponding PUCCH resource of an ith MAC sub-PDU in the plurality of MAC sub-PDUs arranged according to a second order in the plurality of PUCCH resources arranged according to the first order, wherein i is a non-negative integer.
The method of claim 37, wherein the first order is a resource number from big to small or from small to big order, and the second order is a MAC sub-PDU from front to back or from back to front in a MAC PDU.
The method according to any of claims 31-34, wherein the PUCCH resources corresponding to the plurality of MAC sub-PDUs are non-consecutive PUCCH resources from the plurality of PUCCH resources.
The method of claim 39, wherein PUCCH resources corresponding to two adjacent MAC sub-PDUs of the plurality of MAC sub-PDUs are two PUCCH resources separated by one or more PUCCH resources, respectively.
The method of claim 39 or 40, wherein the determining the physical uplink control channel PUCCH resource corresponding to each of the plurality of MAC sub-PDUs according to the order of the plurality of MAC sub-PDUs comprises:

determining an M x i-th PUCCH resource as a PUCCH resource corresponding to an i-th MAC sub-PDU in the plurality of MAC sub-PDUs arranged according to a fourth sequence from the plurality of PUCCH resources arranged according to the third sequence;

wherein M is a PUCCH resource between two PUCCH resources corresponding to two adjacent MAC sub-PDUs in the plurality of MAC sub-PDUs arranged in the fourth order, M is a positive integer, and i is a non-negative integer.
The method of claim 41, wherein the determining an M x i-th PUCCH resource among the plurality of PUCCH resources in a third order as a corresponding PUCCH resource of an i-th MAC sub-PDU of the plurality of MAC sub-PDUs in a fourth order comprises:

determining the Mxi-th PUCCH resource as a corresponding PUCCH resource of the ith MAC sub-PDU in the plurality of MAC sub-PDUs arranged in the fourth order in the plurality of PUCCH resources arranged in the third order under the condition that the M x i is not more than N;

and N is the number of the PUCCHs.
The method of claim 42, further comprising:

and when M × i > N, determining, from the plurality of PUCCH resources arranged in the third order, an M × i + k-th PUCCH resource as a corresponding PUCCH resource of an i-th MAC sub-PDU from the plurality of MAC sub-PDUs arranged in the fourth order, where k is a positive integer smaller than M.
The method according to any of claims 41 to 43, wherein the third order is a resource number from big to small or from small to big order, and the fourth order is a MAC sub-PDU from front to back or from back to front in a MAC PDU.
The method of any of claims 31 to 34, wherein the plurality of PUCCH resources comprises multiple sets of PUCCH resources, and wherein a set of PUCCH resources of the multiple sets of PUCCH resources is a PUCCH resource corresponding to a MAC sub-PDU in one of a plurality of slots.
The method of claim 45, wherein the plurality of sets of PUCCH resources and the plurality of slots have a one-to-one correspondence.
The method of claim 45 or 46, wherein the plurality of sets of PUCCH resources comprise a first set of PUCCH resources corresponding to MAC sub-PDUs in odd-numbered slots and a second set of PUCCH resources corresponding to MAC sub-PDUs in even-numbered slots.
The method of claim 47, further comprising:

and sending back-off timing indication information, wherein the back-off timing indication information is used for timing PUCCH resources corresponding to MAC sub-PDUs in odd-numbered slots to the first group of PUCCH resources and timing PUCCH resources corresponding to MAC sub-PDUs in even-numbered slots to the second group of PUCCH resources.
The method of any one of claims 31 to 48, further comprising:

determining the plurality of PUCCH resources.
The method of claim 49, further comprising:

sending first information;

the first information is used for configuring the plurality of PUCCH resources for the terminal equipment.
The method of claim 50, wherein the first information configures the plurality of PUCCH resources for a terminal device via system information or Radio Resource Control (RRC) dedicated signaling.
The method of any one of claims 49 to 51, further comprising:

sending second information, wherein the second information is used for configuring PUCCH resources for 4-step random access for terminal equipment;

wherein the determining the plurality of PUCCH resources comprises:

determining the plurality of PUCCH resources among the PUCCH resources for 4-step random access.
The method of claim 52, further comprising:

transmitting third information for indicating positions of the plurality of PUCCH resources in the PUCCH resources for 4-step random access.
The method according to claim 53, wherein the third information indicates the location of the PUCCH resources for 4-step random access by means of physical uplink control channel resource indication (PRI) or higher layer signaling in a Random Access Response (RAR) in the PUCCH resources.
The method according to claim 53 or 54, wherein the determining the plurality of PUCCH resources in the PUCCH resources for 4-step random access comprises:

determining the plurality of PUCCH resources among the PUCCH resources for 4-step random access without transmitting information for configuring the plurality of PUCCH resources.
The method of any of claims 31 to 55, wherein each of the plurality of MAC sub-PDUs corresponds to one of the plurality of PUCCH resources.
The method according to any of claims 31 to 56, wherein the method is applied to a 2-step random access procedure.
A method of receiving feedback information, comprising:

sending a Media Access Control (MAC) Protocol Data Unit (PDU); wherein the MAC PDU comprises a plurality of MAC sub-PDUs;

determining a Physical Uplink Control Channel (PUCCH) resource corresponding to each MAC sub-PDU in the plurality of MAC sub-PDUs according to the first information and the first mapping relation; wherein the first mapping relation comprises a mapping relation between at least one PUCCH resource and at least one information, the at least one information comprises the first information, and the first information comprises a preamble used by message A and/or a PUSCH resource used by message A;

and receiving the feedback information of the same MAC sub-PDU on the PUCCH resource of each of the plurality of MAC sub-PDUs.
The method of claim 58, further comprising:

sending configuration information;

the configuration information is used for configuring the first mapping relation for the terminal equipment.
The method according to claim 58 or 59, wherein the PUSCH resources used by the message A comprise the number of PUSCH resources used by the message A and/or the number of PUSCH demodulation reference signals (DMRS) used by the message A.
A terminal device, comprising:

a communication unit, configured to receive a media access control MAC protocol data unit PDU; wherein the MAC PDU comprises a plurality of MAC sub-PDUs;

a processing unit, configured to determine, in multiple PUCCH resources, a physical uplink control channel PUCCH resource corresponding to each MAC sub-PDU of the multiple MAC sub-PDUs according to the sequence of the multiple MAC sub-PDUs;

the communication unit is further configured to send feedback information of the same MAC sub-PDU on a PUCCH resource of each of the plurality of MAC sub-PDUs.
The terminal device according to claim 61, wherein the MAC sub-PDUs comprise MAC sub-PDUs carrying fallback random access responses, RARs, and MAC sub-PDUs carrying successful RARs.
The terminal device according to claim 61, wherein the plurality of MAC sub-PDUs comprises only MAC sub-PDUs carrying successful RARs.
The terminal device according to any of claims 61 to 63, wherein the plurality of MAC sub-PDUs is a partial MAC sub-PDU of the MAC PDUs.
The terminal device of any one of claims 61-64, wherein the PUCCH resources corresponding to the plurality of MAC sub-PDUs is a consecutive PUCCH resource of the plurality of PUCCH resources.
The terminal device of claim 65, wherein the resources corresponding to the plurality of MAC sub-PDUs correspond one-to-one to the plurality of PUCCH resources.
The terminal device according to claim 65 or 66, wherein the processing unit is specifically configured to:

determining an ith PUCCH resource as a corresponding PUCCH resource of an ith MAC sub-PDU in the plurality of MAC sub-PDUs arranged according to a second order in the plurality of PUCCH resources arranged according to the first order, wherein i is a non-negative integer.
The terminal device according to claim 67, wherein the first order is a resource number from big to small or from small to big order, and the second order is a MAC sub-PDU from front to back or from back to front in a MAC PDU.
The terminal device of any one of claims 61-64, wherein a PUCCH resource corresponding to the plurality of MAC sub-PDUs is a non-consecutive PUCCH resource of the plurality of PUCCH resources.
The terminal device of claim 69, wherein the PUCCH resources corresponding to two adjacent MAC sub-PDUs of the plurality of MAC sub-PDUs are two PUCCH resources separated by one or more PUCCH resources, respectively.
The terminal device according to claim 69 or 70, wherein the processing unit is specifically configured to:

determining an M x i-th PUCCH resource as a PUCCH resource corresponding to an i-th MAC sub-PDU in the plurality of MAC sub-PDUs arranged according to a fourth sequence from the plurality of PUCCH resources arranged according to the third sequence;

wherein M is a PUCCH resource between two PUCCH resources corresponding to two adjacent MAC sub-PDUs in the plurality of MAC sub-PDUs arranged in the fourth order, M is a positive integer, and i is a non-negative integer.
The terminal device of claim 71, wherein the processing unit is further configured to:

determining the Mxi-th PUCCH resource as a corresponding PUCCH resource of the ith MAC sub-PDU in the plurality of MAC sub-PDUs arranged in the fourth order in the plurality of PUCCH resources arranged in the third order under the condition that the M x i is not more than N;

and N is the number of the PUCCHs.
The terminal device of claim 72, wherein the processing unit is further configured to:

and when M × i > N, determining, from the plurality of PUCCH resources arranged in the third order, an M × i + k-th PUCCH resource as a corresponding PUCCH resource of an i-th MAC sub-PDU from the plurality of MAC sub-PDUs arranged in the fourth order, where k is a positive integer smaller than M.
The terminal device according to any of claims 71 to 73, wherein the third order is a resource number from big to small or from small to big order, and the fourth order is a MAC sub-PDU from front to back or from back to front in a MAC PDU.
The terminal device of any one of claims 61 to 64, wherein the plurality of PUCCH resources comprises multiple sets of PUCCH resources, one of the multiple sets of PUCCH resources being a PUCCH resource corresponding to a MAC sub-PDU within one of multiple slots.
The terminal device of claim 75, wherein the plurality of sets of PUCCH resources and the plurality of slots correspond one-to-one.
The terminal device of claim 75 or 76, wherein the plurality of sets of PUCCH resources comprise a first set of PUCCH resources corresponding to MAC sub-PDUs in odd-numbered slots and a second set of PUCCH resources corresponding to MAC sub-PDUs in even-numbered slots.
The terminal device of claim 77, wherein the communication unit is further configured to:

and receiving back-off timing indication information, wherein the back-off timing indication information is used for timing PUCCH resources corresponding to MAC sub-PDUs in odd-numbered slots to the first group of PUCCH resources and timing PUCCH resources corresponding to MAC sub-PDUs in even-numbered slots to the second group of PUCCH resources.
The terminal device of any one of claims 61-78, wherein the processing unit is further configured to:

determining the plurality of PUCCH resources.
The terminal device of claim 79, wherein the communication unit is further configured to:

receiving first information;

the first information is used for configuring the plurality of PUCCH resources for the terminal equipment.
The terminal device of claim 80, wherein the first information configures the plurality of PUCCH resources for the terminal device via system information or Radio Resource Control (RRC) dedicated signaling.
The terminal device of any of claims 79 to 81, wherein the communication unit is further configured to:

receiving second information, wherein the second information is used for configuring PUCCH resources for 4-step random access for terminal equipment;

wherein the processing unit is specifically configured to:

determining the plurality of PUCCH resources among the PUCCH resources for 4-step random access.
The terminal device of claim 82, wherein the communication unit is further configured to:

receiving third information indicating positions of the plurality of PUCCH resources in the PUCCH resources for 4-step random access.
The terminal device according to claim 83, wherein the third information indicates the locations of the plurality of PUCCH resources in the PUCCH resources for 4-step random access via physical uplink control channel resource indication (PRI) or higher layer signaling in a Random Access Response (RAR).
The terminal device according to claim 83 or 84, wherein the processing unit is specifically configured to:

determining the plurality of PUCCH resources among the PUCCH resources for 4-step random access without receiving information for configuring the plurality of PUCCH resources.
The terminal device of any one of claims 61-85, wherein each of the plurality of MAC sub-PDUs corresponds to one of the plurality of PUCCH resources.
The terminal device according to any of claims 61-86, wherein the terminal device is adapted to a 2-step random access procedure.
A terminal device, comprising:

a communication unit, configured to receive a media access control MAC protocol data unit PDU; wherein the MAC PDU comprises a plurality of MAC sub-PDUs;

a processing unit, configured to determine, according to the first information and the first mapping relationship, a physical uplink control channel PUCCH resource corresponding to each MAC sub-PDU of the multiple MAC sub-PDUs; wherein the first mapping relation comprises a mapping relation between at least one PUCCH resource and at least one information, the at least one information comprises the first information, and the first information comprises a preamble used by message A and/or a PUSCH resource used by message A;

the communication unit is further configured to send feedback information of the same MAC sub-PDU on a PUCCH resource of each of the plurality of MAC sub-PDUs.
The terminal device of claim 88, wherein the communication unit is further configured to:

receiving configuration information;

the configuration information is used for configuring the first mapping relation for the terminal equipment.
The terminal device according to claim 88 or 89, wherein the PUSCH resources used by the message A comprise the number of PUSCH resources used by the message A and/or the number of PUSCH demodulation reference signals (DMRS) used by the message A.
A network device, comprising:

a communication unit, configured to send a media access control MAC protocol data unit PDU; wherein the MAC PDU comprises a plurality of MAC sub-PDUs;

a processing unit, configured to determine, in multiple PUCCH resources, a physical uplink control channel PUCCH resource corresponding to each MAC sub-PDU of the multiple MAC sub-PDUs according to the sequence of the multiple MAC sub-PDUs;

the communication unit is further configured to receive feedback information of the same MAC sub-PDU on a PUCCH resource of each of the plurality of MAC sub-PDUs.
The network device of claim 91, wherein the plurality of MAC sub-PDUs comprises a MAC sub-PDU carrying a fallback Random Access Response (RAR) and a MAC sub-PDU carrying a successful RAR.
The network device of claim 91, wherein the plurality of MAC sub-PDUs comprises only MAC sub-PDUs carrying successful RARs.
The network device of any one of claims 91 to 93, wherein the plurality of MAC sub-PDUs are partial MAC sub-PDUs in the MAC PDU.
The network device of any one of claims 91 to 94, wherein the PUCCH resources corresponding to the plurality of MAC sub-PDUs is a consecutive PUCCH resource of the plurality of PUCCH resources.
The network device of claim 95, wherein the resources corresponding to the plurality of MAC sub-PDUs correspond one-to-one to the plurality of PUCCH resources.
The network device according to claim 95 or 96, wherein the processing unit is specifically configured to:

determining an ith PUCCH resource as a corresponding PUCCH resource of an ith MAC sub-PDU in the plurality of MAC sub-PDUs arranged according to a second order in the plurality of PUCCH resources arranged according to the first order, wherein i is a non-negative integer.
The network device of claim 97, wherein the first order is a resource number from big to small or from small to big order, and the second order is a MAC sub-PDU order from front to back or from back to front in a MAC PDU.
The network device of any one of claims 91-94, wherein a PUCCH resource corresponding to the plurality of MAC sub-PDUs is a non-consecutive PUCCH resource of the plurality of PUCCH resources.
The network device of claim 99, wherein the PUCCH resources corresponding to two adjacent MAC sub-PDUs in the plurality of MAC sub-PDUs are two PUCCH resources separated by one or more PUCCH resources.
The network device of claim 99 or 100, wherein the processing unit is specifically configured to:

determining an M x i-th PUCCH resource as a PUCCH resource corresponding to an i-th MAC sub-PDU in the plurality of MAC sub-PDUs arranged according to a fourth sequence from the plurality of PUCCH resources arranged according to the third sequence;

wherein M is a PUCCH resource between two PUCCH resources corresponding to two adjacent MAC sub-PDUs in the plurality of MAC sub-PDUs arranged in the fourth order, M is a positive integer, and i is a non-negative integer.
The network device of claim 101, wherein the processing unit is more specifically configured to:

determining the Mxi-th PUCCH resource as a corresponding PUCCH resource of the ith MAC sub-PDU in the plurality of MAC sub-PDUs arranged in the fourth order in the plurality of PUCCH resources arranged in the third order under the condition that the M x i is not more than N;

and N is the number of the PUCCHs.
The network device of claim 102, wherein the processing unit is further configured to:

and when M × i > N, determining, from the plurality of PUCCH resources arranged in the third order, an M × i + k-th PUCCH resource as a corresponding PUCCH resource of an i-th MAC sub-PDU from the plurality of MAC sub-PDUs arranged in the fourth order, where k is a positive integer smaller than M.
The network device of any one of claims 101 to 103, wherein the third order is a resource number from large to small or from small to large order, and the fourth order is a MAC sub-PDU from front to back or from back to front in a MAC PDU.
The network device of any one of claims 91 to 94, wherein the plurality of PUCCH resources comprises multiple sets of PUCCH resources, one of the multiple sets of PUCCH resources being a PUCCH resource corresponding to a MAC sub-PDU within one of multiple slots.
The network device of claim 105, wherein the plurality of sets of PUCCH resources and the plurality of slots correspond one-to-one.
The network device of claim 105 or 106, wherein the plurality of sets of PUCCH resources comprise a first set of PUCCH resources and a second set of PUCCH resources, wherein the first set of PUCCH resources are PUCCH resources corresponding to MAC sub-PDUs in odd-numbered slots, and the second set of PUCCH resources are PUCCH resources corresponding to MAC sub-PDUs in even-numbered slots.
The network device of claim 107, wherein the communication unit is further configured to:

and sending back-off timing indication information, wherein the back-off timing indication information is used for timing PUCCH resources corresponding to MAC sub-PDUs in odd-numbered slots to the first group of PUCCH resources and timing PUCCH resources corresponding to MAC sub-PDUs in even-numbered slots to the second group of PUCCH resources.
The network device of any one of claims 91-108, wherein the processing unit is further configured to:

determining the plurality of PUCCH resources.
The network device of claim 109, wherein the communication unit is further configured to:

sending first information;

the first information is used for configuring the plurality of PUCCH resources for the terminal equipment.
The network device of claim 110, wherein the first information configures the plurality of PUCCH resources for the terminal device via system information or radio resource control, RRC, dedicated signaling.
The network device of any one of claims 109-111, wherein the communication unit is further configured to:

sending second information, wherein the second information is used for configuring PUCCH resources for 4-step random access for terminal equipment;

wherein the processing unit is specifically configured to:

determining the plurality of PUCCH resources among the PUCCH resources for 4-step random access.
The network device of claim 112, wherein the communication unit is further configured to:

transmitting third information for indicating positions of the plurality of PUCCH resources in the PUCCH resources for 4-step random access.
The network device of claim 113, wherein the third information indicates the locations of the plurality of PUCCH resources in the PUCCH resources for 4-step random access by means of a physical uplink control channel resource indication PRI or higher layer signaling in a random access response, RAR.
The network device of claim 113 or 114, wherein the processing unit is further configured to:

determining the plurality of PUCCH resources among the PUCCH resources for 4-step random access without transmitting information for configuring the plurality of PUCCH resources.
The network device of any one of claims 91 to 115, wherein each of the plurality of MAC sub-PDUs corresponds to one of the plurality of PUCCH resources.
The network device of any one of claims 91 to 116, wherein the network device is adapted to perform a 2-step random access procedure.
A network device, comprising:

a communication unit, configured to send a media access control MAC protocol data unit PDU; wherein the MAC PDU comprises a plurality of MAC sub-PDUs;

a processing unit, configured to determine, according to the first information and the first mapping relationship, a physical uplink control channel PUCCH resource corresponding to each MAC sub-PDU of the multiple MAC sub-PDUs; wherein the first mapping relation comprises a mapping relation between at least one PUCCH resource and at least one information, the at least one information comprises the first information, and the first information comprises a preamble used by message A and/or a PUSCH resource used by message A;

the communication unit is further configured to receive feedback information of the same MAC sub-PDU on a PUCCH resource of each of the plurality of MAC sub-PDUs.
The network device of claim 118, wherein the communication unit is further configured to:

sending configuration information;

the configuration information is used for configuring the first mapping relation for the terminal equipment.
The network device of claim 118 or 119, wherein the PUSCH resources used by the message a comprise a number of PUSCH resources used by the message a and/or a number of PUSCH demodulation reference signals, DMRS, used by the message a.
A terminal device, comprising:

a processor, a memory for storing a computer program, and a transceiver, the processor for invoking and executing the computer program stored in the memory to perform the method of any one of claims 1 to 30.
A network device, comprising:

a processor, a memory for storing a computer program, and a transceiver, the processor for invoking and executing the computer program stored in the memory to perform the method of any one of claims 31-60.
A chip, comprising:

a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method of any one of claims 1 to 30.
A chip, comprising:

a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method of any one of claims 31 to 60.
A computer-readable storage medium for storing a computer program which causes a computer to perform the method of any one of claims 1 to 30.
A computer-readable storage medium for storing a computer program which causes a computer to perform the method of any one of claims 31 to 60.
A computer program product comprising computer program instructions to cause a computer to perform the method of any one of claims 1 to 30.
A computer program product comprising computer program instructions to cause a computer to perform the method of any of claims 31 to 60.
A computer program, characterized in that the computer program causes a computer to perform the method according to any one of claims 1 to 30.
A computer program, characterized in that the computer program causes a computer to perform the method according to any of claims 31 to 60.