RU2790862C1 - Method and device for harq feedback - Google Patents

Abstract

FIELD: wireless communication.

SUBSTANCE: method for the HARQ feedback includes: after receiving a first random access message Msg.A transmitted by each terminal, returning a second random access message Msg.B to said terminal by the base station. The Msg.B message is configured to indicate the respective feedback parameters of the feedback terminals of the HARQ terminal, wherein the respective HARQ feedback resources of the HARQ feedback terminals are different.

EFFECT: reduced collision of terminals that need to perform HARQ feedback using the same HARQ feedback resource, and increased efficiency of terminal feedback in relation to the Msg.B message.

16 cl, 12 dwg, 3 tbl

Description

FIELD OF TECHNOLOGY

The invention relates to the field of wireless communication technology and, in particular, to a method and apparatus for feedback hybrid automatic repeat request (HARQ, hybrid automatic repeat request) and a computer-readable data carrier.

BACKGROUND OF THE INVENTION

With the development of wireless communication technology, users place high demands on wireless communication, which contributes to the continuous development of wireless communication technology to the fifth generation (5G) mobile communication network.

In the prior art, supported by 5G New Radio (NR), the 3rd Generation Partnership Project (3GPP) standardized 2-way random access and proposed a 2-way random access mechanism. According to this mechanism, the terminal sends a first random access message Msg.A to the base station, and the base station returns a second random access message Msg.B to the terminal in response to the Msg.A message sent by the terminal to complete the random access between the terminal and the base station. station. For the proposed 2-round random access process, there is no good solution for the terminal to perform a HARQ feedback for the base station after the terminal receives the Msg.B message returned by the base station.

SUMMARY OF THE INVENTION

The invention provides a HARQ feedback method, a HARQ feedback device, and a computer-readable storage medium. The technical solution is described below.

According to a first aspect of embodiments of the invention, a HARQ feedback method applicable in a base station is provided.

The method includes:

returning a second random access message Msg.B to at least one terminal after receiving a first random access message Msg.A transmitted by each of said at least one terminal, wherein the Msg.B message is configured to indicate the HARQ feedback resource of each HARQ feedback terminal from said at least one terminal, wherein the HARQ feedback resources of the respective HARQ feedback terminals are different; and receiving the HARQ feedback sent by each HARQ feedback terminal for the Msg.B message in the HARQ feedback resource of each HARQ feedback terminal.

Optionally, returning a Msg.B message to said at least one terminal includes: returning a Msg.B message containing parameters of a physical uplink control channel (PUCCH) of the respective HARQ feedback terminals to said at least one terminal, wherein the PUCCH parameters of different terminals from the respective HARQ feedback terminals are different. The PUCCH parameter includes a time parameter k and a PUCCH resource _PRI indicator Δ; the time parameter k is configured to calculate a timing of transmission of the HARQ feedback, and the PUCCH resource indicator _∆PRI is configured to calculate a PUCCH resource sequence number for transmitting the HARQ feedback in the PUCCH resource set; wherein the PUCCH resource set is a set of possible PUCCH resources configured with high-level signaling.

Optionally, the PUCCH parameters of the respective HARQ feedback terminals include a common time parameter k shared by the HARQ feedback terminals and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal; or

the PUCCH parameters of the respective HARQ feedback terminals include a time parameter k of each HARQ feedback terminal and a common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals; or

the PUCCH parameters of the respective HARQ feedback terminals include a time parameter k of each HARQ feedback terminal and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include the common time parameter k shared by the HARQ feedback terminals and the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal,

common parameter to time shared by HARQ feedback terminals is transmitted in the physical downlink control channel (PDCCH, physical downlink control channel) messages Msg.B, a

the _PUCCH resource indicator Δ of each HARQ feedback terminal is transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include a parameter to the time of each HARQ feedback terminal and a common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals,

the common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals is sent on the PDCCH of Msg.B messages, and

the parameter to the time of each HARQ feedback terminal is transmitted in private information of each HARQ feedback terminal, wherein the private information of each HARQ feedback terminal is transmitted in the physical downlink shared channel (PDSCH) of the Msg.B message.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include the time parameter k of each HARQ feedback terminal and the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal,

the parameter-to-time of each HARQ feedback terminal and the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal are transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, before receiving the HARQ feedback sent by each HARQ feedback terminal for the Msg.B message in the HARQ feedback resource of each HARQ feedback terminal, the method includes:

obtaining PUCCH resource offset information of each HARQ feedback terminal based on the offset configuration information, wherein the PUCCH resource offset information is configured to indicate a PUCCH resource offset for HARQ feedback relative to the PUCCH reference resource, and the PUCCH reference resource is a PUCCH resource, calculated based on the PUCCH resource _PRI indicator Δ; And

determining a HARQ feedback resource of each HARQ feedback terminal based on the PUCCH resource offset information of each HARQ feedback terminal.

Optionally, the offset configuration information includes PUCCH resource offset information for each random access preamble sequence, and obtaining the PUCCH resource offset information of each HARQ feedback terminal based on the offset configuration information includes: obtaining the PUCCH resource offset information of each HARQ feedback terminal by requesting offset configuration information based on the preamble sequence included in the Msg.A message transmitted by each HARQ feedback terminal.

Optionally, the Msg.B message includes private information of each of said at least one terminal, and the offset configuration information contains PUCCH resource offset information corresponding to the location where the private information is in the Msg.B message; And

obtaining the PUCCH resource offset information of each HARQ feedback terminal based on the offset configuration information includes:

obtaining the PUCCH resource offset information of each HARQ feedback terminal by requesting the offset configuration information based on the private information location of each HARQ feedback terminal in the Msg.B message.

Optionally, before returning the Msg.B message to the at least one terminal, the method also includes: broadcasting the offset configuration information on a broadcast channel.

Optionally, the Msg.A message includes a random access preamble sequence and a PUSCH. The HARQ feedback terminal is a terminal for which the base station detects the corresponding preamble sequence and successfully parses the content in the corresponding PUSCH.

Optionally, said at least one terminal also includes corresponding retransmission terminals, wherein the retransmission terminal is a terminal for which the base station detects the corresponding preamble sequence and cannot parse the content in the PUSCH, the Msg.B message is also configured to indicate a retransmission resource. transmission of each retransmission terminal, and the method also includes: receiving a PUSCH in the Msg.A message of each retransmission terminal, which is retransmitted by each retransmission terminal, in the retransmission resource of each retransmission terminal.

According to a second aspect of the embodiments of the invention, a HARQ feedback method applicable in a target terminal is provided.

The method includes:

transmitting the first random access message Msg.A to the base station;

receiving a second random access message Msg.B returned by the base station, wherein the Msg.B message is configured to indicate the HARQ feedback resource of each HARQ feedback terminal from said at least one terminal, wherein the HARQ feedback resources of the respective HARQ feedback terminals are different ; And

transmitting the HARQ feedback to the base station in response to the target terminal being any of the corresponding HARQ feedback terminals.

Optionally, the Msg.B message contains the PUCCH parameters of the respective HARQ feedback terminals, wherein the PUCCH parameters of different terminals from the respective HARQ feedback terminals are different; And

before transmitting the HARQ feedback to the base station in the HARQ feedback resource of the target terminal, the method also includes:

extracting the PUCCH parameter of the target terminal from the Msg.B message;

obtaining a HARQ feedback resource of the target terminal based on the PUCCH parameter of the target terminal;

wherein the PUCCH parameter includes the time parameter and the PUCCH resource _PRI indicator Δ; the time parameter k is configured to calculate the HARQ feedback transmission time, and the PUCCH resource indicator is configured to calculate the PUCCH resource sequence number for the HARQ feedback in the PUCCH resource set, the PUCCH resource set being the set of possible PUCCH resources configured by the higher layer alarms.

Optionally, the PUCCH parameters of the respective HARQ feedback terminals include a common time parameter k shared by the HARQ feedback terminals and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal; or

the PUCCH parameters of the respective HARQ feedback terminals include a time parameter of each HARQ feedback terminal and a common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals; or the PUCCH parameters of the respective HARQ feedback terminals include the time parameter of each HARQ feedback terminal and the PUCCH resource indicator _∆PRI of each HARQ feedback terminal.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include a common parameter to time shared

by the HARQ feedback terminals, and the PUCCH resource indicator _∆PRI of each HARQ feedback terminal,

a common parameter to the time shared by the HARQ feedback terminals is sent on the PDCCH of the Msg.B message,

and the PUCCH resource indicator Δ _PRI of each HARQ feedback terminal is transmitted in the private information of each HARQ feedback terminal, the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include a parameter to the time of each HARQ feedback terminal and a common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals,

the common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals is sent on the PDCCH of Msg.B messages, and

the time parameter k of each HARQ feedback terminal is transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include the time parameter of each HARQ feedback terminal and the PUCCH resource indicator _∆PRI of each HARQ feedback terminal,

the time parameter k of each HARQ feedback terminal and the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal are transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, before transmitting the HARQ feedback to the base station in the HARQ feedback resource of the target terminal, the method includes:

obtaining target terminal PUCCH resource offset information based on the offset configuration information, wherein the PUCCH resource offset information is configured to indicate a HARQ feedback PUCCH resource offset relative to the PUCCH reference resource, and the PUCCH reference resource is a PUCCH resource calculated based on indicator Δ_PRI PUCCH resource; And

determining a target terminal HARQ feedback resource based on the target terminal PUCCH resource offset information.

Optionally, the offset configuration information includes PUCCH resource offset information of each random access preamble sequence; And

obtaining the target terminal PUCCH resource offset information based on the offset configuration information includes:

obtaining the offset information of the PUCCH resource of the target terminal by requesting the offset configuration information based on the preamble sequence in the Msg.A message sent by the target terminal.

Optionally, the Msg.B message includes private information of each said at least one terminal, and the offset configuration information includes PUCCH resource offset information corresponding to the location of the private information in the Msg.B message; And

obtaining the target terminal PUCCH resource offset information based on the offset configuration information includes:

obtaining the target terminal's PUCCH resource offset information by requesting the offset configuration information based on the location of the target terminal's private information in the Msg.B message.

Optionally, before transmitting the Msg.A message to the base station, the method also includes: receiving the offset configuration information broadcast by the base station.

Optionally, the Msg.A message includes a random access preamble sequence and a PUSCH, and the HARQ feedback terminal is a terminal for which the base station detects the corresponding preamble sequence and successfully parses the content in the PUSCH.

Optionally, the Msg.B message is also configured to indicate the retransmission resource of each retransmission terminal of said at least one terminal, wherein each retransmission terminal is a terminal for which the base station detects the corresponding preamble sequence and cannot parse the content in the PUSCH , and the method also includes: retransmitting the PUSCH in the Msg.A message in the target terminal's retransmission resource in response to the target terminal being any of the retransmission terminals.

According to a third aspect of the embodiments of the invention, a device for HARQ feedback applicable in a base station is provided. The device comprises: an access message return module and a retransmission feedback receiving module.

The access message return module is configured to return a second random access message Msg.B to at least one terminal after receiving the first random access message Msg.A transmitted by each of said at least one terminal, wherein the Msg.B message is configured to indicate a feedback resource HARQ of each HARQ feedback terminal of the at least one terminal, wherein the HARQ feedback resources of the respective HARQ feedback terminals are different.

The retransmission feedback receiving unit is configured to receive the HARQ feedback transmitted by each HARQ feedback terminal for the Msg.B message in the HARQ feedback resource of each HARQ feedback terminal.

Optionally, the access message return module is configured to return a Msg.B message containing the parameters of the physical uplink control channel (PUCCH) of the respective HARQ feedback terminals to the at least one terminal, wherein the PUCCH parameters of different terminals from the respective HARQ feedback terminals are different. .

The PUCCH parameter includes a parameter to time and a PUCCH resource _PRI indicator Δ; the parameter to time is configured to calculate the timing of transmission of the HARQ feedback, and the indicator Δ _PRI of the PUCCH resource is configured to calculate the sequence number of the PUCCH resources for transmission of the HARQ feedback in the PUCCH resource set; wherein the PUCCH resource set is a set of possible PUCCH resources configured with high-level signaling.

Optionally, the PUCCH parameters of the respective HARQ feedback terminals include a common time parameter shared by the HARQ feedback terminals and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal; or

the PUCCH parameters of the respective HARQ feedback terminals include a time parameter of each HARQ feedback terminal and a common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals; or

the PUCCH parameters of the respective HARQ feedback terminals include a time parameter of each HARQ feedback terminal and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include the common time parameter k shared by the HARQ feedback terminals and the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal,

the common time parameter k shared by the HARQ feedback terminals is transmitted on the PDCCH of the Msg.B message, and the PUCCH resource indicator _∆PRI of each HARQ feedback terminal is transmitted in the private information of each HARQ feedback terminal, the private information of each HARQ feedback terminal is transmitted in the PDSCH message Msg.B.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include the time parameter k of each HARQ feedback terminal and the common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals,

the common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals is sent on the PDCCH of Msg.B messages, and

the time parameter k of each HARQ feedback terminal is transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include the time parameter of each HARQ feedback terminal and the PUCCH resource indicator _∆PRI of each HARQ feedback terminal,

the time parameter k of each HARQ feedback terminal and the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal are transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, the device also contains: a module for obtaining information about the offset and a module for determining the feedback resource.

The offset information obtaining unit is configured to obtain the offset information of the PUCCH resource of each HARQ feedback terminal based on the offset configuration information before the retransmission feedback receiving unit receives the HARQ feedback transmitted by each HARQ feedback terminal for the Msg.B message. in the HARQ feedback resource of each HARQ feedback terminal, wherein the PUCCH resource offset information is configured to indicate a PUCCH resource offset for transmitting HARQ feedback relative to the PUCCH reference resource, and the PUCCH reference resource is a PUCCH resource calculated based on the indicator Δ_PRI PUCCH resource.

The feedback resource determining unit is configured to determine the HARQ feedback resource of each HARQ feedback terminal based on the PUCCH resource offset information of each HARQ feedback terminal.

Optionally, the offset configuration information includes PUCCH resource offset information for each random access preamble sequence, and the offset information obtaining module is also configured to obtain the PUCCH resource offset information of each HARQ feedback terminal by requesting the offset configuration information based on the preamble sequence, included in the Msg.A message transmitted by each HARQ feedback terminal.

Optionally, the Msg.B message includes private information of each said at least one terminal, and the offset configuration information includes PUCCH resource offset information corresponding to the location where the private information is in the Msg.B message; And

the offset information retrieval module is also configured to:

obtaining the offset information of the PUCCH resource of each HARQ feedback terminal by requesting the offset configuration information based on the private information location of each HARQ feedback terminal in the Msg.B message.

Optionally, the device also contains: a configuration information transfer module. The configuration information transmitting module is configured to transmit the offset configuration information on a broadcast channel before the access message return module returns the Msg.B message to the at least one terminal.

Optionally, the Msg.A message includes a random access preamble sequence and a PUSCH. The HARQ feedback terminal is a terminal for which the base station detects the corresponding preamble sequence and successfully parses the content in the corresponding PUSCH.

Optionally, said at least one terminal also includes corresponding retransmission terminals, wherein the retransmission terminal is a terminal for which the base station detects the corresponding preamble sequence and cannot parse the content in the PUSCH, the Msg.B message is also configured to indicate a retransmission resource. transmission of each retransmission terminal, and the device also comprises: a retransmission message receiving module configured to receive a PUSCH in the Msg.A message of each retransmission terminal, which is retransmitted by each retransmission terminal in the retransmission resource of each retransmission terminal. Each retransmission terminal is any of the respective retransmission terminals.

According to a fourth aspect of the embodiments of the invention, a device for HARQ feedback applicable in a target terminal is provided. The device comprises: a module for transmitting a first access message, a module for receiving a second access message and a feedback module.

The first access message transmitting module is configured to transmit the first random access message Msg.A to the base station.

The second access message receiving module is configured to receive a second random access message Msg.B returned by the base station, wherein the Msg.B message is configured to indicate the HARQ feedback resource of each HARQ feedback terminal from the at least one terminal, the feedback resources The HARQs of the respective HARQ feedback terminals are different.

The feedback module is configured to send HARQ feedback to the base station in response to the target terminal being any of said HARQ feedback terminals.

Optionally, the Msg.B message contains the PUCCH parameters of the respective HARQ feedback terminals, wherein the PUCCH parameters of different terminals from the respective HARQ feedback terminals are different, and the device also comprises: a parameter extraction module and a feedback resource acquisition module.

The parameter extractor is configured to extract the target terminal's PUCCH parameter from the Msg.B message before the loopback terminal sends HARQ feedback to the base station in the target terminal's HARQ feedback resource.

The feedback resource obtaining module is configured to obtain the HARQ feedback resource of the target terminal based on the PUCCH parameter of the target terminal.

The PUCCH parameter includes a parameter to time and a PUCCH resource _PRI indicator Δ; parameter-to-time is configured to calculate the timing of the HARQ feedback transmission, and the PUCCH resource indicator Δ _PRI is configured to calculate the PUCCH resource sequence number for the HARQ feedback in the PUCCH resource set, the PUCCH resource set being the set of possible PUCCH resources configured with using high-level signaling.

Optionally, the PUCCH parameters of the respective HARQ feedback terminals include a common time parameter k shared by the HARQ feedback terminals and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal; or

the PUCCH parameters of the respective HARQ feedback terminals include a time parameter of each HARQ feedback terminal and a common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals; or

the PUCCH parameters of the respective HARQ feedback terminals include a time parameter of each HARQ feedback terminal and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include a common time parameter shared by the HARQ feedback terminals and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal,

the common time parameter shared by the HARQ feedback terminals is sent on the PDCCH of the Msg.B message, and

the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal is transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include a parameter to the time of each HARQ feedback terminal and a common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals,

the common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals is transmitted on the PDCCH of the Msg.B message, and

the parameter to the time of each HARQ feedback terminal is transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include the time parameter of each HARQ feedback terminal and the PUCCH resource indicator _∆PRI of each HARQ feedback terminal,

the time parameter k of each HARQ feedback terminal and the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal are transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, the device also contains: a module for obtaining information about the offset and a module for determining the feedback resource.

The offset information obtaining module is configured to obtain the target terminal PUCCH resource offset information based on the offset configuration information before the feedback module transmits the HARQ feedback to the base station in the target terminal HARQ feedback resource, wherein the PUCCH resource offset information configured to indicate a PUCCH resource offset for HARQ feedback with respect to the PUCCH reference resource, and the PUCCH reference resource is a PUCCH resource calculated based on the PUCCH resource indicator _ΔPRI .

The feedback resource determination module is configured to determine the HARQ feedback resource of the target terminal based on the target terminal's PUCCH resource offset information.

Optionally, the offset configuration information includes PUCCH resource offset information of each random access preamble sequence; And

the offset information obtaining module is also configured to: obtain the offset information of the PUCCH resource of the target terminal by requesting the offset configuration information based on the preamble sequence in the Msg.A message transmitted by the target terminal.

Optionally, the Msg.B message contains the private information of each said at least one terminal, and the offset configuration information contains the PUCCH resource offset information corresponding to the location of the private information in the Msg.B message; And

the offset information obtaining module is also configured to: obtain the offset information of the PUCCH resource of the target terminal by requesting the offset configuration information based on the location of the target terminal's private information in the Msg.B message.

Optionally, the device also contains: configuration information receiving module. The configuration information receiving unit is configured to receive the offset configuration information transmitted by the base station on the broadcast channel before the first access message transmitting unit transmits the first random access message Msg.A to the base station.

Optionally, the Msg.A message contains the random access preamble sequence and PUSCH. The HARQ feedback terminal is a terminal for which the base station detects the corresponding preamble sequence and successfully parses the content in the PUSCH.

Optionally, the Msg.B message is also configured to indicate the retransmission resource of each retransmission terminal of said at least one terminal, wherein each retransmission terminal is a terminal for which the base station detects the corresponding preamble sequence and cannot parse the content in the PUSCH and the device also comprises: a retransmission message transmitting module configured to retransmit the PUSCH in the Msg.A message in the target terminal's retransmission resource in response to the target terminal being any of the retransmission terminals.

According to a fifth aspect of the embodiments of the invention, a device for HARQ feedback applicable in a base station is provided. The device comprises: a processor and a memory configured to store instructions executable by the processor. The processor is configured to return a second random access message Msg.B to at least one terminal upon receiving a first random access message Msg.A transmitted by each of said at least one terminal, wherein the Msg.B message is configured to indicate each terminal's HARQ feedback resource HARQ feedback from said at least one terminal, wherein the HARQ feedback resources of the respective HARQ feedback terminals are different; and receiving the HARQ feedback transmitted by each HARQ feedback terminal for the Msg.B message in the HARQ feedback resource of each HARQ feedback terminal.

According to a sixth aspect of the embodiments of the invention, a HARQ feedback apparatus applicable in a base station is provided. The device comprises: a processor and a memory configured to store instructions executable by the processor. The processor is configured to transmit the first random access message Msg.A to the base station; receiving a second random access message Msg.B returned by the base station, the Msg.B message configured to indicate a HARQ feedback resource of each HARQ feedback terminal from at least one terminal, and the HARQ feedback resources of the respective HARQ feedback terminals are different; and transmitting the HARQ feedback to the base station in response to the fact that the target terminal is any of said HARQ feedback terminals.

According to a seventh aspect of the embodiments of the invention, a computer-readable storage medium is provided. The computer-readable storage medium contains executable instructions, and when the processor in the base station calls the executable instructions, the HARQ feedback method according to the first aspect or any implementation of the first aspect is performed.

According to an eighth aspect of the embodiments of the invention, a computer-readable storage medium is provided. The computer-readable storage medium contains executable instructions, and when the processor at the terminal calls the executable instructions, the HARQ feedback method according to the second aspect or any implementation of the second aspect is performed.

The technical solution of the embodiments of the invention may provide at least the following advantages.

Upon detecting the Msg.A message sent by each of said at least one terminal, the base station returns the Msg.B message to said at least one terminal. The Msg.B message is configured to indicate the HARQ feedback resource of each HARQ feedback terminal of the at least one terminal, wherein the HARQ feedback resources of the respective HARQ feedback terminals are different. The HARQ feedback transmitted by each HARQ feedback terminal for the Msg.B message is received by the base station in the HARQ feedback resource of each HARQ feedback terminal. According to the invention, the Msg.B message returned by the base station to said at least one terminal is used to indicate the feedback parameters of the respective HARQ feedback terminals, and the HARQ feedback transmitted by each terminal that needs to perform HARQ feedback is received for various resources. feedback, which reduces collisions of terminals that need to perform HARQ feedback using the same HARQ feedback resource, and improves terminal feedback efficiency for the Msg.B message.

It should be understood that the foregoing general description and the following detailed description are merely examples and do not limit the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic diagram of a wireless communication system according to an embodiment of the invention.

Fig. 2 is a block diagram of a four round random access according to an embodiment of the invention.

Fig. 3 is a block diagram of a two-stage random access according to the invention.

Fig. 4 is a flowchart of a HARQ feedback method according to an embodiment of the invention.

Fig. 5 is a flowchart of a HARQ feedback method according to an embodiment of the invention.

Fig. 6 is a flowchart of a HARQ feedback method according to an embodiment of the invention.

Fig. 7 is a schematic diagram of the Msg.B message returned by the base station to the terminal, in accordance with an embodiment of the invention.

Fig. 8 is a flowchart of a HARQ feedback method according to an embodiment of the invention.

Fig. 9 is a block diagram of a device for HARQ feedback according to an exemplary embodiment of the invention.

Fig. 10 is a block diagram of a device for HARQ feedback according to an exemplary embodiment of the invention.

Fig. 11 is a diagram of a base station according to an embodiment of the invention.

Fig. 12 is a diagram of a terminal according to an embodiment of the invention.

DETAILED DESCRIPTION OF THE INVENTION

Next will be discussed in detail examples of the invention, illustrated in the accompanying drawings. The following description refers to the accompanying drawings, and the same numbers in different drawings represent the same or similar elements, unless otherwise indicated. The implementations set forth in the following description of exemplary embodiments of the invention do not represent all implementations of the invention. Instead, they are merely examples of devices and methods according to aspects related to the invention as set forth in the appended claims.

It should be understood that the word "multiple" mentioned in the description refers to one or more, and the word "many" refers to two or more. The expression "and/or" describes the relationship of the respective objects, indicating that there can be three types of relationship, for example, the expression "A and/or B" means that A exists separately, A and B exist simultaneously, and B exists separately . The "/" character usually indicates that the corresponding entities specified before and after that character are in an "or" relationship. For ease of understanding, some application scenarios involved in the invention will be briefly presented below.

Fig. 1 is a diagram of a wireless communication system according to an embodiment of the invention. As shown in FIG. 1, the wireless communication system is a communication system based on cellular mobile communication technology. The wireless communication system may include multiple terminals 110 and base stations 120.

Terminal 110 may be a device that provides voice and/or data communications to a user. Terminal 110 may communicate with one or more core networks via a radio access network (RAN). Terminal 110 may be an IoT terminal, such as a touch device, a mobile phone (or cell phone), and an IoT terminal computer, such as a desktop, handheld, handheld, wearable, embedded computer, or vehicle-mounted device, such as a station. (STA), user equipment, subscriber station, mobile station, mobile phone, remote station, access point, remote terminal, access terminal, user terminal, user agent, user device or user equipment (UE, user equipment). Alternatively, terminal 110 may also be an unmanned aerial vehicle device, an airborne device, or the like.

Base station 120 may be a network device in a wireless communication system. The wireless communication system may also be a 5G system, also known as a new radio (NR, new radio) system. Alternatively, the wireless communication system may also be a next generation system after the 5G system.

Optionally, base station 120 may also be a base station (gNB) using a centralized and distributed architecture in a 5G system. If base station 120 uses a centralized and distributed architecture, it typically includes a central unit (CU, central unit) and at least two distributed units (DU, distributed unit). The CU is equipped with packet data convergence protocol (PDCP), radio link control (RLC) and media access control (MAC) protocol stacks. The DU is provided with a physical (PHY) layer protocol stack. The specific implementation of base station 120 is not limited to embodiments of the invention.

A wireless connection can be established between the base station 120 and the terminal 110 via a wireless air interface. In various embodiments, the wireless radio interface is a wireless air interface based on the fifth generation mobile network (5G) technology standard, for example, the wireless air interface is NR; or the wireless air interface may be a wireless air interface based on a next generation mobile communication network technology standard based on 5G.

Optionally, the wireless communication system may also include a network manager 130 .

The base stations 120 may be respectively connected to the network manager 130 . The network manager 130 may be a core network device in a wireless communication system. The network manager 130 may be a mobility management entity (MME) of an evolved packet core (EPC). Alternatively, the network control device may also be another core network device such as a serving gateway (SGW, serving gateway), a public data network gateway (PGW), and a charging policy and rule function (PCRF) policy and charging rules function) or home subscriber server (HSS, home subscriber server). The implementation form of the network control device 130 is not limited to embodiments of the invention.

Optionally, in the wireless communication system described above, terminal 110 may initiate contention-based random access to base station 120. Fig. 2 is a block diagram of a four round random access according to an embodiment of the invention. As shown in FIG. 2, the respective steps of the four-round random access may include the following steps.

In step 201, the terminal sends a message Msg.l: random access preamble sequence (Preamble) to the base station.

The terminal transmits the preamble to the base station, and the base station estimates the transmission delay of the terminal based on the preamble to achieve uplink synchronization.

In step 202, the base station sends a message Msg.2: random access response (RAR, random access response) to the terminal.

The base station transmits a timing advance command based on the transmission delay estimated in the first step above to adjust the transmission time of the terminal. The Msg.2 message is hosted by the media access control (MAC) layer of the base station and is transmitted on a downlink shared channel (DL SCH). One Msg.2 message can simultaneously respond to random access requests from multiple terminals.

The base station uses the PDCCH to schedule the Msg message. 2 and addresses (ie, scrambling) by C-RNTI or RA-RNTI. The RA-RNTI is determined by the location of the physical random access channel (PRACH) time-frequency resource that carries the Msg message. 1. The Msg.2 message contains the uplink transmission timing advance value and allocates uplink resources and a temporary C-RNTI to the Msg.3 message.

In step 203, the terminal sends a Msg.3 message to the base station, which is the first scheduled transmission.

After receiving the Msg.2 message, the terminal transmits the Msg.3 message in the allocated uplink resources and transmits a user equipment identifier (UE ID) to the base station via PUSCH.

Optionally, the Msg.3 message contains a common control channel (CCCH) service data unit (SDU) that is used for the Msg.4 message to carry the conflict resolution identifier.

In step 204, the base station transmits an Msg.4 message, a contention resolution message, to the terminal.

The contention resolution message is transmitted by the base station to the terminal on the PDSCH.

In order to reduce the time delay of the random access process and improve the random access efficiency of the terminal, the 3GPP group proposed a 2-way random access mechanism in Release 16, that is, 2-way random access. As shown in FIG. 3, the respective two-stage random access steps may include the following steps.

In step 301, the terminal sends a Msg.A message to the base station.

Optionally, the Msg.A message includes the contents of the Msg.l and Msg.3 messages, that is, the Msg.A message includes: a random access preamble sequence and a UE ID. The UE identifier may be one of C-RNTI, temporary C-RNTI, and RA-RNTI.

Optionally, step 301 may include step 301a and step 30lb.

In step 301a, the terminal may transmit the selected preamble on the PRACH resource, and at the same time, the base station will detect the preamble on the corresponding PRACH.

In step 30lb, the terminal may also send payload information on the PUSCH resource, where the payload information includes information equivalent to the Msg.3 message, such as UE ID and partial user data.

When the base station detects the preamble in step 301a, the base station receives the payload information transmitted by the terminal in the corresponding PUSCH resource.

In step 302, the base station transmits a Msg.B message to the terminal.

That is, when the base station successfully receives the preamble or payload information in the Msg.A message, the base station may transmit the Msg.B message to the terminal. Optionally, the Msg.B message includes the contents of the Msg.2 and Msg.4 messages, ie the Msg.B message includes: random access response and contention resolution information. Accordingly, the transmission mode of the Msg.B message corresponds to the PDCCH and PDSCH mode.

For the two-stage random access process described above, in order to improve the reliability of transmission of the Msg.B message between the terminal and the base station, it is proposed that the terminal side perform HARQ feedback on the condition that the Msg.B message is received.

In the prior art for an NR system in a HARQ feedback scheme for a terminal, the terminal can calculate the HARQ feedback resource according to the end time of the received data, and perform feedback on the calculated feedback resource. For example, when the terminal can perform HARQ feedback on the received data on the PDCCH, which indicates semi-persistent scheduling (SPS), the terminal can obtain the end time of data reception and shift the end time by time offset m to obtain the feedback time HARQ. The time offset m may be indicated in the downlink control information (DCI) transmitted by the base station. Optionally, the base station may configure the time slot set for DCI through high-level signaling, and the DCI may direct the terminal to use the value in the time slot set as the time offset t used to calculate the HARQ feedback time of this retransmission.

Optionally, when the terminal performs HARQ feedback at the calculated HARQ time, it also needs to determine which PUCCH resource within the time to use for HARQ transmission. That is, the terminal must also determine the specific PUCCH resource. In an exemplary implementation, a method for determining a PUCCH resource by a terminal may be as follows. Higher level signaling may pre-configure a set of PUCCH resources for a terminal, and each PUCCH in the set has a unique sequence number. When the number of PUCCH resources in the PUCCH resource set configured by the high-level signaling for the terminal is less than or equal to 8, the sequence number of each PUCCH can be directly indicated by a 3-bit information field in the DCI. For example, 001 may indicate a PUCCH sequence number in the PUCCH resource, and the terminal may obtain the corresponding PUCCH resource according to 001 indicated by the information field in the DCI. When the number of PUCCH resources in the PUCCH resource set configured by the high-level signaling for the terminal exceeds 8, the terminal may calculate the sequence number of the PUCCH resource in use by the output formula based on the lowest control channel element (CCE) number of the control field in which the set is located. PUCCH resources, and the indication value of the 3-bit information field. Optionally, the output formula can be as follows:

- общее количество ССЕ, принадлежащих полю управления, в котором расположен PDCCH,

- наименьший номер ССЕ среди ССЕ, принадлежащих полю управления, в котором расположен PDCCH,

- значение индикации 3-битного информационного поля в DCI, a R_PUCCH mod 8 соответствует остатку от деления R_PUCCH на 8. Опционально, терминал может выполнять обратную связь HARQ для данных в PDSCH, принятых им самим, что также может быть выполнено со ссылкой на описанный выше способ.r _PUCCH is the sequence number of the PUCCH resource obtained by calculation, R _PUCCH is the number of PUCCH resources in the PUCCH resource set configured for the terminal by signaling,

is the total number of CCEs belonging to the control field in which the PDCCH is located,

- the smallest CCE number among the CCEs belonging to the control field in which the PDCCH is located,

is the indication value of the 3-bit information field in the DCI, and R _PUCCH mod 8 corresponds to the remainder of dividing R _PUCCH by 8. Optionally, the terminal may perform HARQ feedback on the data in the PDSCH received by itself, which may also be performed with reference to the method described above.

When the above decision is applied to the terminal to perform HARQ feedback under the condition of receiving the Msg.B message, the data received by the terminal is the Msg.B message. However, when the terminal performs random access, an RRC connection between the terminal and the base station is not established. The PUCCH resource set to be selected in the above scheme cannot be configured by high-level signaling. In this case, the PUCCH resource set to be selected is generally broadcast to the terminal via a system message. If a plurality of terminals initiate two-stage random access to a base station at the same time, the PDCCH used for the Msg.B message returned by the base station is the same. In this case, if the indication value of the 3-bit information field indicating the plurality of terminals in the DCI is the same, then for the plurality of terminals sharing the same set of PUCCH resources, the HARQ feedback resources calculated by the plurality of terminals will be the same, that is in the above solution, when performing HARQ feedback with the base station, there may be a collision problem for the PUCCH resource used by multiple terminals, so that the terminal cannot perform HARQ feedback for the Msg.B message, so that the terminal's feedback efficiency for Msg. B goes down.

In order to reduce the collision of PUCCHs used when multiple terminals perform HARQ feedback, the invention provides a HARQ feedback method. Fig. 4 is a flowchart of a HARQ feedback method according to an embodiment of the invention. The method may be applied to the wireless communication system shown in FIG. 1 and is performed by a base station in the system. As shown in figure 4, the method includes the following steps.

Step 401 returns a second random access message Msg.B to the at least one terminal after receiving the first random access message Msg.A sent by each of said at least one terminal.

The Msg.B message is configured to indicate the HARQ feedback resource of each HARQ feedback terminal of the at least one terminal, wherein the HARQ feedback resources of the respective HARQ feedback terminals are different.

In step 402, the HARQ feedback sent by each HARQ feedback terminal for the Msg.B message is received in the HARQ feedback resource of each HARQ feedback terminal.

Optionally, returning a Msg.B message to said at least one terminal includes:

returning a Msg.B message containing physical uplink control channel (PUCCH) parameters of the respective HARQ feedback terminals to the at least one terminal, wherein the PUCCH parameters of different terminals of the respective HARQ feedback terminals are different; wherein

the PUCCH parameter includes the parameter to time and the PUCCH resource _PRI indicator Δ; the time parameter k is configured to calculate a timing of transmission of the HARQ feedback, and the PUCCH resource indicator _∆PRI is configured to calculate a PUCCH resource sequence number for transmitting the HARQ feedback in the PUCCH resource set; wherein the PUCCH resource set is a set of possible PUCCH resources configured with high-level signaling.

Optionally, the PUCCH parameters of the respective HARQ feedback terminals include a common time parameter shared by the HARQ feedback terminals and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal; or

the PUCCH parameters of the respective HARQ feedback terminals include a time parameter of each HARQ feedback terminal and a common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals; or

the PUCCH parameters of the respective HARQ feedback terminals include a time parameter of each HARQ feedback terminal and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal.

Optionally, when the PUCCH parameters of each HARQ feedback terminal include a common time parameter shared by the HARQ feedback terminals and a PUCCH resource indicator _∆PRI of each HARQ feedback terminal,

a common time parameter shared by the HARQ feedback terminals is transmitted on the Physical Downlink Control Channel (PDCCH) of the Msg.B message, and

the PUCCH resource indicator _∆Δ of each HARQ feedback terminal is transmitted in the private information of each HARQ feedback terminal, wherein the private information of each HARQ feedback terminal is transmitted in the physical downlink shared channel (PDSCH) of the Msg.B message.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include a parameter to the time of each HARQ feedback terminal and a common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals,

the common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals is sent on the PDCCH of Msg.B messages, and

the time parameter k of each HARQ feedback terminal is transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include the time parameter k of each HARQ feedback terminal and the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal,

the time parameter k of each HARQ feedback terminal and the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal are transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, before receiving the HARQ feedback sent by each HARQ feedback terminal for the Msg.B message in the HARQ feedback resource of each HARQ feedback terminal, the method also includes:

obtaining PUCCH resource offset information of each HARQ feedback terminal based on the offset configuration information, wherein the PUCCH resource offset information is configured to indicate the offset of the HARQ feedback PUCCH resource relative to the PUCCH reference resource, wherein the PUCCH reference resource is a PUCCH resource ,

calculated based on the PUCCH resource _PRI indicator Δ; And

determining a HARQ feedback resource of each HARQ feedback terminal based on the PUCCH resource offset information of each HARQ feedback terminal.

Optionally, the offset configuration information includes PUCCH resource offset information for each random access preamble sequence, and obtaining the PUCCH resource offset information of each HARQ feedback terminal based on the offset configuration information includes: obtaining the PUCCH resource offset information of each HARQ feedback terminal by requesting the offset configuration information based on the preamble sequence included in the Msg.A message transmitted by each HARQ feedback terminal.

Optionally, the Msg.B message contains private information of each said at least one terminal, and the offset configuration information includes PUCCH resource offset information corresponding to the location where the private information is in the Msg.B message; And

obtaining the PUCCH resource offset information of each HARQ feedback terminal based on the offset configuration information includes:

obtaining the PUCCH resource offset information of each HARQ feedback terminal by requesting the offset configuration information based on the private information location of each HARQ feedback terminal in the Msg.B message.

Optionally, before returning the Msg.B message to the at least one terminal, the method also includes: broadcasting the offset configuration information on a broadcast channel.

Optionally, the Msg.A message includes a random access preamble sequence and a PUSCH; And

the HARQ feedback terminal is a terminal for which the base station detects the corresponding preamble sequence and successfully parses the content in the PUSCH.

Optionally, said at least one terminal also includes corresponding retransmission terminals, wherein the retransmission terminal is a terminal for which the base station detects the corresponding preamble sequence and cannot parse the content in the PUSCH, the Msg.B message is also configured to indicate a retransmission resource. transmission of each retransmission terminal, and the method also includes: receiving a PUSCH in the Msg.A message of each retransmission terminal, which is retransmitted by each retransmission terminal in the retransmission resource of each retransmission terminal. Each retransmission terminal is any of the respective retransmission terminals.

Finally, upon detecting the Msg.A message sent by each of said at least one terminal, the base station returns the Msg.B message to said at least one terminal. The Msg.B message is configured to indicate the feedback parameters of the respective HARQ feedback terminals from the at least one terminal. The base station receives the HARQ feedback transmitted by each HARQ feedback terminal for the Msg.B message in the HARQ feedback resource of each HARQ feedback terminal. According to the invention, the feedback parameters of the respective HARQ feedback terminals are indicated in the Msg.B message returned by the base station to said at least one terminal, and the HARQ feedback transmitted by each terminal that needs to perform HARQ feedback is received in different feedback resources, which reduces collisions of terminals that need to perform HARQ feedback using the same HARQ feedback resource, and improves terminal feedback efficiency for the Msg.B message.

Fig. 5 is a flowchart of a HARQ feedback method according to an embodiment of the invention. As shown in FIG. 5, the HARQ feedback method may be applied to the wireless communication system shown in FIG. 1 and is executed by the target terminal of at least two terminals corresponding to the power save signal transmitted by the base station. The method may include the following steps.

In step 501, the first random access message Msg.A is transmitted to the base station.

In step 502, a second random access message Msg.B returned by the base station is received.

The Msg.B message is configured to indicate the HARQ feedback resource of each HARQ feedback terminal of the at least one terminal, wherein the HARQ feedback resources of the respective HARQ feedback terminals are different.

In step 503, if the target terminal is any of the HARQ feedback terminals, the HARQ feedback is transmitted to the base station.

Optionally, the Msg.B message contains the PUCCH parameters of the respective HARQ feedback terminals, wherein the PUCCH parameters of different terminals from the respective HARQ feedback terminals are different; and before transmitting the HARQ feedback to the base station, the method also includes:

extracting the PUCCH parameter of the target terminal from the Msg.B message;

obtaining a HARQ feedback resource of the target terminal based on the PUCCH parameter of the target terminal;

wherein the PUCCH parameter includes the time parameter k and the PUCCH resource indicator _ΔPRI ; parameter-to-time is configured to calculate the timing of the HARQ feedback transmission, and the PUCCH resource indicator Δ _PRI is configured to calculate the PUCCH resource sequence number for the HARQ feedback in the PUCCH resource set, the PUCCH resource set being the set of possible PUCCH resources configured with using high-level signaling.

Optionally, the PUCCH parameters of the respective HARQ feedback terminals include a common time parameter k shared by the HARQ feedback terminals and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal; or

the PUCCH parameters of the respective HARQ feedback terminals include a time parameter of each HARQ feedback terminal and a common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals; or

the PUCCH parameters of the respective HARQ feedback terminals include a time parameter of each HARQ feedback terminal and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include a common time parameter shared by the HARQ feedback terminals and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal,

the common time parameter k shared by the HARQ feedback terminals is transmitted on the PDCCH of the Msg.B message, and the PUCCH resource indicator _∆PRI of each HARQ feedback terminal is transmitted in the private information of each HARQ feedback terminal, the private information of each HARQ feedback terminal is transmitted in the PDSCH message Msg.B.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include a parameter to the time of each HARQ feedback terminal and a common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals,

the common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals is sent on the PDCCH of Msg.B messages, and

the time parameter k of each HARQ feedback terminal is transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include the time parameter of each HARQ feedback terminal and the PUCCH resource indicator _∆PRI of each HARQ feedback terminal,

the time parameter k of each HARQ feedback terminal and the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal are transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, before transmitting the HARQ feedback to the base station in the target terminal's HARQ feedback resource, the method also includes:

obtaining target terminal PUCCH resource offset information based on the offset configuration information, wherein the PUCCH resource offset information is configured to indicate a HARQ feedback PUCCH resource offset relative to the PUCCH reference resource, and the PUCCH reference resource is a PUCCH resource calculated based on indicator Δ _PRI resource PUCCH; and determining a target terminal HARQ feedback resource based on the target terminal PUCCH resource offset information.

Optionally, the offset configuration information includes PUCCH resource offset information of each random access preamble sequence; And

obtaining the target terminal PUCCH resource offset information based on the offset configuration information includes:

obtaining the offset information of the PUCCH resource of the target terminal by requesting the offset configuration information based on the preamble sequence in the Msg.A message sent by the target terminal.

Optionally, the Msg.B message contains the private information of each said at least one terminal, and the offset configuration information includes PUCCH resource offset information corresponding to the location of the private information in the Msg.B message; And

obtaining the target terminal PUCCH resource offset information based on the offset configuration information includes:

obtaining the target terminal's PUCCH resource offset information by requesting the offset configuration information based on the location of the target terminal's private information in the Msg.B message.

Optionally, before transmitting the Msg.A message to the base station, the method also includes: receiving the offset configuration information broadcast by the base station.

Optionally, the Msg.A message includes a random access preamble sequence and a PUSCH, and the HARQ feedback terminal is a terminal for which the base station detects the corresponding preamble sequence and successfully parses the content in the PUSCH.

Optionally, the Msg.B message is also configured to indicate the retransmission resource of each retransmission terminal of said at least one terminal, where each retransmission terminal is a terminal for which the base station detects the corresponding preamble sequence and cannot parse the content in the PUSCH, and the method also includes: retransmitting the PUSCH in the Msg.A message in the target terminal's retransmission resource in response to the target terminal being any of the retransmission terminals.

Finally, upon detecting the Msg.A message sent by each of said at least one terminal, the base station returns the Msg.B message to said at least one terminal. The Msg.B message is configured to indicate the feedback parameters of the respective HARQ feedback terminals from the at least one terminal. The base station receives the HARQ feedback transmitted by each HARQ feedback terminal for the Msg.B message in the HARQ feedback resource of each HARQ feedback terminal. According to the invention, the feedback parameters of the respective HARQ feedback terminals are indicated in the Msg.B message returned by the base station to said at least one terminal, and the HARQ feedback transmitted by each terminal that needs to perform HARQ feedback is received in different feedback resources, which reduces collisions of terminals that need to perform HARQ feedback using the same HARQ feedback resource, and improves terminal feedback efficiency for the Msg.B message.

For example, the Msg.B message returned by the base station to the terminal contains the PUCCH parameters configured by the base station for the respective HARQ feedback terminals. Fig. 6 is a flowchart of a HARQ feedback method according to an embodiment of the invention. As shown in FIG. 6, the HARQ feedback method may be applied to the wireless communication system shown in FIG. 1 and is executed by the base station and the terminal in the system. The method may include the following steps.

In step 601, the target terminal transmits a first random access message Msg.A to the base station.

Accordingly, the base station receives the Msg.A message transmitted by the target terminal.

With regard to the method for the target terminal to transmit the Msg.A message to the base station, the description of step 301 in FIG. 3, that is, the Msg.A message may include a random access preamble sequence and a PUSCH, and the target terminal may send a preamble on the PRACH and send payload information on the PUSCH, which will not be described again here.

In step 602, after receiving the Msg.A message transmitted by the target terminal, the base station returns the Msg.B message to at least one terminal including the target terminal.

Accordingly, the target terminal receives the Msg.B message returned by the base station.

The Msg.B message is configured to indicate the HARQ feedback resource of each HARQ feedback terminal of the at least one terminal, wherein the HARQ feedback resources of the respective HARQ feedback terminals are different.

In the random access process, after the base station receives the Msg.A message transmitted by the terminal, it will actively return the Msg.B message to the terminal, so that the terminal's random access process can continue. If there are other terminals that transmit the Msg.A message to the same base station at the same time as the target terminal, then when the base station receives the Msg.A message from the target terminal, it may also receive the Msg.A messages transmitted other terminals, that is, the base station may simultaneously receive Msg.A messages transmitted by various terminals including the target terminal, and the base station may return the Msg.B message to these terminals simultaneously after receiving the first Msg.A random access messages transmitted by the target terminal and others. terminals.

For example, in FIG. 7 is a schematic diagram of the Msg.B message returned by the base station to the terminal in accordance with an embodiment of the invention. In FIG. 7 shows the message Msg.B 701 returned by the base station and containing the private information of each terminal. The private information of the target terminal is private information 3. As can be seen from FIG. 7, the base station may send a Msg.B message containing the private information of each terminal to the plurality of terminals. Of course, if the base station receives the target terminal's Msg.A message only when the target terminal transmits the Msg.A message to the base station, the Msg.B message returned this time may contain only the target terminal's private information. Optionally, the content of each terminal's private information in Msg.B may include a preamble sequence number used by the corresponding terminal and whether the corresponding terminal needs to perform HARQ feedback. Each terminal that needs to perform HARQ feedback is a HARQ feedback terminal according to the invention.

Again looking at FIG. 7 as an example, in a possible implementation, when the target terminal successfully receives the content of private information 3 transmitted on the PDCCH, it also successfully receives the content of private information 3 transmitted on the PDSCH, that is, the base station successfully receives the preamble and payload information in the Msg message. .A transmitted by the target terminal and private information 3 returned by the base station to the target terminal contains a random access response on the PDCCH and contention resolution information on the PDSCH. In this case, if the target terminal successfully receives private information 3, the target terminal may know that it needs to perform HARQ feedback on the Msg.B message received this time, and the content of the feedback is an acknowledgment character (ACK). In this case, the target terminal is one of the HARQ feedback terminals. That is, each HARQ feedback terminal is a terminal for which the base station detects the corresponding preamble sequence and successfully parses the content in the corresponding PUSCH.

In an exemplary implementation, when the target terminal learns from the received private information 3 that private information 3 contains the indicated retransmission resource for PUSCH (i.e., the Msg.B message is also configured to indicate the retransmission resource of each retransmission terminal), indicating that that the base station has successfully received the preamble in the Msg.A message transmitted by the target terminal, but has not successfully received the payload information transmitted by the target terminal on the PUSCH, and this information must be retransmitted by the target terminal itself. In this case, according to the successfully received private information 3, the target terminal may know that it needs to retransmit the payload information according to the specified retransmission resource for PUSCH in private information 3. In this case, although the target terminal successfully receives the Msg. B returned by the base station, it does not need to perform HARQ feedback to the base station. In this case, the target terminal is one of the retransmission terminals. That is, each retransmission terminal is a terminal for which the base station detects the corresponding preamble sequence and cannot parse the content in the corresponding PUSCH. That is, if the target terminal is any of the retransmission terminals, the target terminal may retransmit the PUSCH in the Msg.A message in the target terminal's retransmission resources indicated in private information 3.

Optionally, if the target terminal is one of the retransmission terminals, the PUSCH in the Msg.A message is retransmitted in the target terminal's retransmission resource. That is, the target terminal does not need to perform HARQ feedback on the received Msg.B message, and directly retransmits the payload information according to the specified retransmission resource for PUSCH in the private information of the Msg.B message. In the exemplary implementation of FIG. 7, in the Msg.B message returned by the base station to the plurality of terminals, the terminals corresponding to private information 1 and private information 2 are retransmission terminals, and the terminals corresponding to private information 3 and private information 4 are terminals HARQ feedback. The base station may receive the PUSCH in the Msg.A message retransmitted by each retransmission terminal in the retransmission resource corresponding to each retransmission terminal, and may receive the HARQ feedback transmitted by each HARQ feedback terminal for the Msg.B message in the return resource. HARQ communication corresponding to each HARQ feedback terminal.

In a possible implementation, the Msg.B message returned by the base station to said at least one terminal is a Msg.B message containing the PUCCH parameters of the respective HARQ feedback terminals. The PUCCH parameters of different terminals from the respective HARQ feedback terminals are different. The PUCCH parameter includes the time parameter k and the PUCCH resource indicator _ΔPRI . The time parameter k is configured to calculate the timing of transmission of the HARQ feedback, and the PUCCH resource indicator is configured to calculate the sequence number of the PUCCH resources used to transmit the HARQ feedback in the PUCCH resource set. The PUCCH resource set is a set of possible PUCCH resources configured with high-level signaling.

The time parameter k is configured to calculate the transmission time of the HARQ feedback transmitted by the target terminal. For example, the time parameter may be a time offset added to the HARQ feedback resource time calculated by the target terminal according to the end time of the Msg.B message returned by the base station. Optionally, the base station may transmit the time parameter k configured for the target terminal in the Msg.B message and return it to the target terminal. The PUCCH resource _PRI indicator Δ may indicate the PUCCH resource used by the target terminal for transmitting HARQ feedback. For example, the PUCCH resource indicator may be the value of the 3-bit information field indicator in the Msg.B message, i.e., the base station may configure the value of the 3-bit information field indicator in the Msg.B message for the target terminal, and the PUCCH resource indicator is carried in the Msg message. .B and passed to the target terminal.

In an exemplary implementation, the PUCCH parameters of the respective HARQ feedback terminals include a common time parameter shared by the HARQ feedback terminals and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal. That is, the above time parameter k is shared by the feedback terminal, and the common time parameter k shared by the HARQ feedback terminals may be transmitted on the PDCCH of the Msg.B message. However, each HARQ feedback terminal has its own PUCCH resource indicator _ΔPRI , wherein the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal may be transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH message Msg.B such that the PUCCH parameters of the respective HARQ feedback terminals are returned to the respective terminals via the Msg.B message. The private information may refer to an information section in the RAR of each HARQ feedback terminal, which includes an information header and corresponding RAR information.

In an exemplary implementation, the PUCCH parameters of the respective HARQ feedback terminals include the time parameter k of each HARQ feedback terminal and a common indicator Δ_PRI PUCCH resource shared by HARQ feedback terminals. That is, the indicator Δ_PRI the PUCCH resource is shared by the HARQ feedback terminals, and the common indicator Δ_PRI The PUCCH resource shared by the HARQ feedback terminals may be sent on the PDCCH of the Msg.B message. However, each HARQ feedback terminal has its own time parameter, the time parameter of each HARQ feedback terminal may be transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message, so that the PUCCH parameters of the respective HARQ feedback terminals are returned to the respective terminals via a Msg.B message.

In an exemplary implementation, the PUCCH parameters of the respective HARQ feedback terminals include the time parameter of each HARQ feedback terminal and the PUCCH resource indicator _∆PRI of each HARQ feedback terminal. That is, each HARQ feedback terminal has its own time parameter k and its own PUCCH resource indicator _ΔPRI . The time parameter k of each HARQ feedback terminal and the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal may be carried in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is carried in the PDSCH of the Msg.B message, so that the PUCCH parameters of the respective terminals, the HARQ feedback is returned to the respective terminals via the Msg.B message.

In step 603, the target terminal extracts the target terminal's PUCCH parameter from the Msg.B message.

That is, when the target terminal is any of the HARQ feedback terminals, the target terminal needs to perform HARQ feedback on the received Msg.B message. When the target terminal performs HARQ feedback, it needs to define its own HARQ feedback resource. Optionally, the target terminal may send HARQ feedback to the base station for the received Msg.B message based on the above HARQ feedback scheme of terminals in the NR system. However, the HARQ feedback resource used when the target terminal transmits the HARQ feedback for the Msg.B message is calculated based on the target terminal's PUCCH parameter carried in the Msg.B message.

In an exemplary implementation, the target terminal may obtain the target terminal's PUCCH parameter carried in the Msg.B message according to the received Msg.B message, and the target terminal may calculate the HARQ feedback resource used in transmitting the HARQ feedback to the base station according to with its own PUCCH parameter.

For example, when the PDCCH of the Msg.B message carries the common time parameter shared by the HARQ feedback terminals, and the PDSCH of the Msg.B message carries the PUCCH resource indicator _ΔPRI of the target terminal, the target terminal can extract the corresponding time parameter k and the PUCCH resource indicator _ΔPRI from the message Msg.B. Alternatively, when the PDSCH of the Msg.B message carries the parameter to the time of the target terminal, and the PDCCH of the Msg.B message carries the common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals, the target terminal can also extract the corresponding time parameter k and resource indicator Δ _PRI PUCCH from Msg.B message. Alternatively, when the PDSCH of the Msg.B message carries the target terminal's time parameter k and the target terminal's _PUCCH resource indicator Δ, the target terminal may also extract the corresponding time parameter k and the PUCCH resource _PRI indicator Δ from the Msg.B message.

In step 604, the target terminal obtains the target terminal's HARQ feedback resource based on the target terminal's PUCCH parameter.

Optionally, the target terminal may calculate the HARQ feedback time based on the terminal's HARQ feedback scheme in the NR system, and calculate the HARQ feedback time according to the end time of receiving the Msg.B message returned by the base station. The target terminal may add a self-extracted time parameter k to the end time of the Msg.B message received from the base station to obtain the HARQ feedback time when the HARQ feedback is transmitted to the base station. When the HARQ feedback time comes, the HARQ feedback is transmitted to the base station.

Optionally, the target terminal may use the extracted PUCCH resource indicator _∆PRI in the output formula in the terminal's HARQ feedback circuit in the NR system to calculate the PUCCH resource number. The target terminal may obtain a specific PUCCH resource in the PUCCH resource set configured by the base station according to the PUCCH resource number corresponding to the PUCCH resource number and use the PUCCH resource for HARQ feedback.

That is, the target terminal can calculate the HARQ feedback resource used by the target terminal to perform HARQ feedback with the base station in this case, based on the corresponding parameter k time and the PUCCH resource indicator _ΔPRI .

When the PUCCH parameters include the common time parameter k shared by the HARQ feedback terminals and the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal, the HARQ feedback time calculated by each HARQ feedback terminal is the same, but the HARQ feedback resources calculated by each by the HARQ feedback terminal based on the output formula are different, thus avoiding conflicts when performing feedback by the respective HARQ feedback terminals. When the PUCCH parameters include the parameter-to-time of each HARQ feedback terminal and the common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals, the HARQ feedback resource calculated by each HARQ feedback terminal according to the above output formula is one and the same. the same, but the HARQ feedback time calculated by each HARQ feedback terminal is different, thus avoiding collisions when feedback is performed by the respective HARQ feedback terminals. When the PUCCH parameters include the parameter to time of each HARQ feedback terminal and the PUCCH resource indicator _∆PRI of each HARQ feedback terminal, the HARQ feedback resources calculated by each HARQ feedback terminal according to the above output formula are different, and the HARQ feedback time calculated by each HARQ feedback terminal is also different, thus avoiding collisions when performing feedback by the respective HARQ feedback terminals.

At step 605, the target terminal sends the HARQ feedback to the base station in its own HARQ feedback resource.

Accordingly, the base station receives the HARQ feedback transmitted by the target terminal for the Msg.B message.

When the target terminal is any of the HARQ feedback terminals, the target terminal may perform HARQ feedback on the Msg.B message received this time according to the HARQ feedback resource obtained by the calculation described above. Due to the PUCCH parameters configured in the manner described above, the HARQ feedback resources calculated by the respective HARQ feedback terminals are different, thus avoiding collisions when feedback is performed by the respective HARQ feedback terminals. Optionally, the base station may also calculate the HARQ feedback resource of each HARQ feedback terminal it needs to monitor according to the PUCCH parameters configured for the terminals, and receive the HARQ feedback returned by the target terminal and other HARQ feedback terminals, in the respective HARQ feedback resources.

Finally, upon detecting the Msg.A message sent by each of said at least one terminal, the base station returns the Msg.B message to said at least one terminal. The Msg.B message is configured to indicate the feedback parameters of the respective HARQ feedback terminals from the at least one terminal. The base station receives the HARQ feedback transmitted by each HARQ feedback terminal for the Msg.B message in the HARQ feedback resource of each HARQ feedback terminal. According to the invention, the feedback parameters of the respective HARQ feedback terminals are indicated in the Msg.B message returned by the base station to said at least one terminal, and the HARQ feedback transmitted by each terminal that needs to perform HARQ feedback is received in different feedback resources, which reduces collisions of terminals that need to perform HARQ feedback using the same HARQ feedback resource, and improves terminal feedback efficiency for the Msg.B message.

In an exemplary implementation, each of the at least one terminal, including the target terminal, may also receive the offset configuration information transmitted by the base station and determine the PUCCH resource offset information based on its own offset configuration information, so that the HARQ feedback resource is determined based on the PUCCH resource offset information. Fig. 8 is a flowchart of a HARQ feedback method according to an embodiment of the invention. The method may be applied to the wireless communication system shown in FIG. 1 and is executed by the base station and the target terminal in the system. Optionally, the terminal may be the target terminal. As shown in FIG. 8, the method may include the following steps.

In step 801, the base station transmits the offset configuration information to the target terminal.

Accordingly, the target terminal receives the offset configuration information transmitted by the base station.

Optionally, the base station configures the unified offset configuration information for the plurality of terminals. The base station may transmit the configured offset configuration information to each terminal via a broadcast channel. Alternatively, the base station may also transmit the offset configuration information to the target terminal or other terminals through high-level signaling after successfully establishing random access with the target terminal or other terminals, so that the target terminal and other terminals may receive the offset configuration information transmitted by the base station. for immediate use in subsequent calculation of the PUCCH resource offset information.

In step 802, the target terminal sends a Msg.A message to the base station.

Accordingly, the base station receives the Msg.A message transmitted by the target terminal.

In step 803, after receiving the first random access message Msg.A transmitted by the target terminal, the base station returns the second random access message Msg.B to the at least one terminal including the target terminal.

Accordingly, the target terminal receives the Msg.B message returned by the base station.

For step 802 and step 803, reference may be made to the description of step 601 and step 602 in the embodiment shown in FIG. 6, which will not be repeated here. Optionally, in step 803, the Msg.B message returned by the base station to the at least one terminal including the target terminal may not include the PUCCH parameters of the respective HARQ feedback terminals, that is, in embodiments of the invention, the target terminal and each HARQ feedback terminal may determine its own HARQ feedback resource directly based on the offset configuration information obtained in step 801.

In step 804, the target terminal obtains the target terminal's PUCCH resource offset information based on the offset configuration information.

The PUCCH resource offset information is configured to indicate an offset of the PUCCH resource used for HARQ feedback with respect to the PUCCH reference resource. The PUCCH reference resource is a PUCCH resource calculated based on the PUCCH resource indicator _ΔPRI .

That is, if the target terminal calculates the first PUCCH resource number according to the output formula in the terminal HARQ feedback scheme in the above NR system, the PUCCH resource corresponding to the first PUCCH resource number is a PUCCH reference resource, and the target terminal needs to add its own information about offsetting the PUCCH resource to the first PUCCH resource number to obtain a new PUCCH resource number.

In an exemplary implementation, the offset configuration information may also include PUCCH resource offset information corresponding to each random access preamble sequence. The target terminal may request the offset configuration information according to the preamble sequence contained in the Msg.A message sent by the target terminal and obtain the target terminal's PUCCH resource offset information. Optionally, the target terminal may request information about the offset configuration that has been received according to the preamble sequence number contained in the Msg.A message transmitted by itself, and obtain its own PUCCH resource offset information according to the preamble sequence number transmitted itself, and information about the offset configuration. For example, Table 1 is a mapping table between preamble sequence number and PUCCH resource offset information used in an embodiment of the invention.

As shown in Table 1, the target terminal may request Table 1 according to the sequence number of the preamble transmitted by itself to obtain its own resource offset information. For example, if the preamble sequence number transmitted by the target terminal is NO.l in Table 1, the PUCCH resource offset information received by the target terminal is resource offset information 1.

In an exemplary implementation, the Msg.B message returned by the base station to the target terminal includes the private information of each of said at least one terminal. The offset configuration information may also include PUCCH resource offset information corresponding to the location of the private information in the Msg.B message. The target terminal may request the offset configuration information according to the location of the target terminal private information contained in the received Msg.B message in the Msg.B message and obtain the target terminal PUCCH resource offset information. Optionally, the target terminal may request the received offset configuration information according to the location number of its own private information in the Msg.B message received by itself to obtain its own PUCCH resource offset information according to the location number of its own private information in the message. Msg.B and offset configuration information. For example, Table 2 is a mapping table between private information location number and PUCCH resource offset information used in embodiments of the invention.

As shown in Table 2, the target terminal may query Table 2 according to the location number of its own private information in the Msg.B message received by itself to obtain its own resource offset information. For example, considering FIG. 7 as an example, the location number of its own private information in the Msg.B message received by the target terminal is the location corresponding to the third information field. If the location number corresponding to the third information field is location number 3 in Table 2 above, the PUCCH resource offset information received by the target terminal is resource offset information 3.

In an exemplary implementation, the target terminal may also calculate the corresponding PUCCH resource offset information according to the location number of its own private information in the Msg.B message received by itself and the offset configuration information received by the target terminal. For example, the offset configuration information transmitted by the base station in step 801 is a fixed value Offset0, and the calculation formula for calculating the PUCCH resource offset information is:

Y=X*Offset0;

Y is the PUCCH resource offset information, and X is the corresponding location number. Optionally, the target terminal may also calculate the PUCCH resource offset information according to the location number of its own private information in the Msg.B message received by itself and the offset configuration information calculation formula received by the target terminal: Y=X*Offset0. For example, taking FIG. 7 again as an example, the location number of its own private information in the Msg.B message received by the target terminal is the location corresponding to the third information field if the location number corresponding to the third information field is location number 3 in Table 2 above, the target terminal inputs it into the above formula to obtain the PUCCH resource offset information, which is 3*Offset0.

In step 805, the target terminal determines the target terminal's HARQ feedback resource according to the target terminal's PUCCH resource offset information.

Optionally, after obtaining its own PUCCH resource offset information, the target terminal may determine its own HARQ feedback resource according to the PUCCH resource offset information and PUCCH resource number obtained by itself using the above inference formula. For the process of obtaining a PUCCH resource number by the target terminal, reference can be made to the description of step 604 by means of the inference formula, which will not be repeated here.

At this step, the target terminal also needs to further calculate the PUCCH target resource number based on the PUCCH resource offset information obtained above, wherein the HARQ feedback resource corresponding to the PUCCH target resource number is the HARQ feedback resource used by the target terminal to perform reverse HARQ communications. Optionally, the method for calculating the PUCCH target resource number may refer to the following formula:

N _PUCCH =(r _PUCCH +P) mod R _PUCCH ;

N _PUCCH is the calculated target PUCCH resource number, and P is PUCCH resource offset information received by the target terminal. For example, the PUCCH resource set configured by the base station for the target terminal is shown in Table 3. Table 3 is a PUCCH resource set configuration table for a plurality of terminals involved in an embodiment of the invention.

As shown in Table 3, the respective HARQ feedback terminals described above can use these 5 PUCCH resources to perform HARQ feedback with the base station. If the PUCCH resource offset 2 information is received by the target terminal, the target terminal may first calculate that the PUCCH resource GRSN number is 4 according to the output formula in the terminal's HARQ feedback scheme in the above NR system. Then, the target terminal can calculate that the Npucch value is 1 according to the above PUCCH target resource number calculation formula, the target terminal can acquire the PUCCH2 resource in the PUCCH resource set configured by the base station according to the PUCCH target resource number, and use the resource PUCCH2 as a HARQ feedback resource used to send HARQ feedback to the base station for the Msg.B message this time.

At step 806, the target terminal sends the HARQ feedback to the base station in its own HARQ feedback resource.

Accordingly, the base station receives the HARQ feedback transmitted by the target terminal for the Msg.B message.

Optionally, to implement step 806, reference can be made to the description of step 605 above, which will not be repeated here.

Finally, upon detecting the Msg.A message sent by each of said at least one terminal, the base station returns the Msg.B message to said at least one terminal. The Msg.B message is configured to indicate the feedback parameters of the respective HARQ feedback terminals from the at least one terminal. The base station receives the HARQ feedback transmitted by each HARQ feedback terminal for the Msg.B message in the HARQ feedback resource of each HARQ feedback terminal. According to the invention, the Msg.B message returned by the base station to said at least one terminal is configured to indicate the feedback parameters of the respective HARQ feedback terminals, and the HARQ feedback transmitted by each terminal that needs to perform HARQ feedback is received in different feedback resources. communication, which reduces collisions of terminals that need to perform HARQ feedback using the same HARQ feedback resource, and improves terminal feedback efficiency for the Msg.B message.

The following are embodiments of the device according to the invention, which can be used to implement embodiments of the method according to the invention. For details that are not disclosed in embodiments of the apparatus according to the invention, reference may be made to embodiments of the method according to the invention.

Fig. 9 is a block diagram of a device for HARQ feedback according to an exemplary embodiment of the invention. As shown in FIG. 9, the HARQ feedback device may be implemented as a whole or as part of a base station in the implementation environment shown in FIG. 1 using hardware or a combination of software and hardware to perform the steps performed by the base station in any of the embodiments of the invention shown in FIG. 3 or fig. 6. The apparatus for the HARQ feedback may include: an access message return module 901 and a retransmission feedback receiver module 902.

The access message return module 901 is configured to return a second random access message Msg.B to at least one terminal after receiving the first random access message Msg.A transmitted by each of said at least one terminal, the Msg.B message being configured to indicate a reverse resource. HARQ communication of each HARQ feedback terminal from the at least one terminal, wherein the HARQ feedback resources of the respective HARQ feedback terminals are different.

The retransmission feedback receiving unit 902 is configured to receive the HARQ feedback transmitted by each HARQ feedback terminal for the Msg.B message in the HARQ feedback resource of each HARQ feedback terminal.

Optionally, the access message return module 901 is configured to:

returning a Msg.B message containing physical uplink control channel (PUCCH) parameters of the respective HARQ feedback terminals to at least one terminal, wherein the PUCCH parameters of different terminals from the respective HARQ feedback terminals are different; wherein

the PUCCH parameter includes the parameter to time and the PUCCH resource _PRI indicator Δ; the time parameter k is configured to calculate a timing of transmission of the HARQ feedback, and the PUCCH resource indicator _∆PRI is configured to calculate a PUCCH resource sequence number for transmission of the HARQ feedback in the PUCCH resource set; wherein the PUCCH resource set is a set of possible PUCCH resources configured with high-level signaling.

Optionally, the PUCCH parameters of the respective HARQ feedback terminals include a common time parameter shared by the HARQ feedback terminals and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal; or

the PUCCH parameters of the respective HARQ feedback terminals include a time parameter k of each HARQ feedback terminal and a common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals; or

the PUCCH parameters of the respective HARQ feedback terminals include a time parameter of each HARQ feedback terminal and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include a common time parameter shared by the HARQ feedback terminals and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal,

the common time parameter k shared by the HARQ feedback terminals is sent on the PDCCH of the Msg.B message, and

the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal is transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include a parameter to the time of each HARQ feedback terminal and a common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals,

the common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals is transmitted on the PDCCH of the Msg.B message, and

the time parameter k of each HARQ feedback terminal is transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include the time parameter of each HARQ feedback terminal and the PUCCH resource indicator _∆PRI of each HARQ feedback terminal,

the time parameter k of each HARQ feedback terminal and the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal are transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, the device also contains: a module for obtaining information about the offset and a module for determining the feedback resource.

The offset information obtaining module is configured to obtain the PUCCH resource offset information of each HARQ feedback terminal based on the offset configuration information before the retransmission feedback receiving module 902 receives the HARQ feedback transmitted by each HARQ feedback terminal for the Msg message. B in the HARQ feedback resource of each HARQ feedback terminal, wherein the PUCCH resource offset information is configured to indicate the offset of the HARQ feedback PUCCH resource relative to the PUCCH reference resource, and the PUCCH reference resource is the PUCCH resource calculated based on the _ΔPRI indicator PUCCH resource.

The feedback resource determining unit is configured to determine the HARQ feedback resource of each HARQ feedback terminal based on the PUCCH resource offset information of each HARQ feedback terminal.

Optionally, the offset configuration information includes PUCCH resource offset information for each random access preamble sequence, and the offset information obtaining module is also configured to obtain the PUCCH resource offset information of each HARQ feedback terminal by requesting the offset configuration information based on the preamble sequence, included in the Msg.A message transmitted by each HARQ feedback terminal.

Optionally, the Msg.B message includes private information of each said at least one terminal, and the offset configuration information includes PUCCH resource offset information corresponding to the location where the private information is in the Msg.B message. The offset information obtaining module is also configured to: obtain the offset information of the PUCCH resource of each HARQ feedback terminal by requesting the offset configuration information based on the private information location of each HARQ feedback terminal in the Msg.B message.

Optionally, the device also contains: a configuration information transfer module. The configuration information transmission module is configured to broadcast the offset configuration information before the access message return module 901 returns the Msg.B message to the at least one terminal.

Optionally, the Msg.A message includes a random access preamble sequence and a PUSCH. The HARQ feedback terminal is a terminal for which the base station detects the corresponding preamble sequence and successfully parses the content in the PUSCH.

Optionally, said at least one terminal also includes respective retransmission terminals, wherein the retransmission terminal is a terminal for which the base station detects the corresponding preamble sequence and cannot parse the content in the PUSCH, and the Msg.B message is also configured to indicate the resource retransmission of each retransmission terminal. The device also contains: a module for receiving a retransmission message. The retransmission message receiving unit is configured to receive the PUSCH in the Msg.A message of each retransmission terminal, which is retransmitted by each retransmission terminal in the retransmission resource of each retransmission terminal. Each retransmission terminal is any one of the respective retransmission terminals.

Fig. 10 is a block diagram of a device for HARQ feedback according to an exemplary embodiment of the invention. As shown in FIG. 10, the HARQ feedback device may be implemented as a whole or as part of a terminal in the implementation environment shown in FIG. 1 using hardware or a combination of software and hardware to perform the steps performed by the target terminal in any of the embodiments of the invention shown in FIG. 4 or FIG. 8. The HARQ feedback device may include: a first access message transmitting module 1001, a second access message receiving module 1002, and a feedback module 1003.

The first access message transmitting unit 1001 is configured to transmit the first random access message Msg.A to the base station.

The second access message receiving unit 1002 is configured to receive a second random access message Msg.B returned by the base station, wherein the Msg.B message is configured to indicate the HARQ feedback resource of each HARQ feedback terminal from the at least one terminal, the feedback resources The HARQs of the respective HARQ feedback terminals are different.

The feedback module 1003 is configured to send HARQ feedback to the base station in response to the target terminal being any of the corresponding HARQ feedback terminals.

Optionally, the Msg.B message contains the PUCCH parameters of the respective HARQ feedback terminals, wherein the PUCCH parameters of different terminals from the respective HARQ feedback terminals are different, and the device also comprises: a parameter extraction module and a feedback resource acquisition module.

The parameter extractor is configured to extract the target terminal's PUCCH parameter from the Msg.B message before the feedback module 1003 sends the HARQ feedback to the base station in the target terminal's HARQ feedback resource.

The feedback resource obtaining module is configured to obtain the HARQ feedback resource of the target terminal based on the PUCCH parameter of the target terminal.

The PUCCH parameter includes a time parameter k and a PUCCH resource _PRI indicator Δ; parameter-to-time is configured to calculate the timing of the HARQ feedback transmission, and the PUCCH resource indicator Δ _PRI is configured to calculate the PUCCH resource sequence number for the HARQ feedback in the PUCCH resource set, the PUCCH resource set being the set of possible PUCCH resources configured with using high-level signaling.

Optionally, the PUCCH parameters of the respective HARQ feedback terminals include a common time parameter k shared by the HARQ feedback terminals and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal; or

the PUCCH parameters of the respective HARQ feedback terminals include a time parameter of each HARQ feedback terminal and a common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals; or

the PUCCH parameters of the respective HARQ feedback terminals include a time parameter of each HARQ feedback terminal and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include a common parameter to time shared

the HARQ feedback terminals, and the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal, the common time parameter k shared by the HARQ feedback terminals is transmitted in the PDCCH of the Msg.B message, and the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal is transmitted in private information of each HARQ feedback terminal, wherein the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include the time parameter k of each HARQ feedback terminal and the common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals,

the common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals is transmitted on the PDCCH of the Msg.B message, and

the time parameter k of each HARQ feedback terminal is transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include the time parameter k of each HARQ feedback terminal and the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal,

the time parameter k of each HARQ feedback terminal and the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal are transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, the device also contains: a module for obtaining information about the offset and a module for determining the feedback resource.

The offset information obtaining module is configured to obtain the target terminal PUCCH resource offset information based on the offset configuration information before the feedback module 1003 transmits the HARQ feedback to the base station in the target terminal HARQ feedback resource, wherein the resource offset information The PUCCH is configured to indicate a PUCCH resource offset for HARQ feedback with respect to the PUCCH reference resource, and the PUCCH reference resource is a PUCCH resource calculated based on the PUCCH resource indicator _ΔPRI .

The feedback resource determination module is configured to determine the HARQ feedback resource of the target terminal based on the target terminal's PUCCH resource offset information.

Optionally, the offset configuration information includes PUCCH resource offset information of each random access preamble sequence, and the offset information obtaining module is also configured to: obtain the target terminal PUCCH resource offset information by requesting the offset configuration information based on the preamble sequence in the Msg message. A sent by the target terminal.

Optionally, the Msg.B message contains private information of each said at least one terminal, and the offset configuration information includes PUCCH resource offset information corresponding to the location of the private information in the Msg.B message. The offset information obtaining module is also configured to: obtain the target terminal's PUCCH resource offset information by requesting the offset configuration information based on the location of the target terminal's private information in the Msg.B message.

Optionally, the device also contains: configuration information receiving module. The configuration information receiving unit is configured to receive the offset configuration information transmitted by the base station on the broadcast channel before the first access message transmitting unit 1001 transmits Msg.A to the base station.

Optionally, Msg.A includes a random access preamble sequence and PUSCH. The HARQ feedback terminal is a terminal for which the base station detects the corresponding preamble sequence and successfully parses the content in the PUSCH.

Optionally, the Msg.B message is also configured to indicate the retransmission resource of each retransmission terminal of said at least one terminal, wherein each retransmission terminal is a terminal for which the base station detects the corresponding preamble sequence and cannot parse the content in the PUSCH, and the device also comprises: a retransmission message transmission module.

The retransmission message transmitting module is configured to retransmit the PUSCH in the Msg.A message in the retransmission resource of the target terminal in response to the target terminal being any of the retransmission terminals.

It should be noted that when the device provided in the above-described embodiment of the invention implements its functions, the division of the above-described functional modules is used as an example for illustration. In real applications, the above functions can be distributed among different functional modules according to actual needs. That is, the device structure is divided into various functional modules to perform all or part of the functions described above.

With regard to the apparatus in the foregoing embodiment, the specific manner in which each module performs the operation has been described in detail in the method embodiment, and no detailed description will be given here.

An embodiment of the invention provides a device for HARQ feedback that can implement all or part of the steps performed by a base station in the embodiment of the invention shown in FIG. 3 or fig. 6 inventions. The HARQ feedback device comprises: a processor and a memory configured to store instructions executable by the processor.

The processor is configured for:

returning a second random access message Msg.B to at least one terminal after receiving a first random access message Msg.A transmitted by each of said at least one terminal, wherein the Msg.B message is configured to indicate the HARQ feedback resource of each HARQ feedback terminal from said at least one terminal, wherein the HARQ feedback resources of the respective HARQ feedback terminals are different; And

receiving the HARQ feedback sent by each HARQ feedback terminal for the Msg.B message in the HARQ feedback resource of each HARQ feedback terminal.

Optionally, when returning the Msg.B message to at least one terminal, the processor is configured to: return a Msg.B message containing the PUCCH parameters of the respective HARQ feedback terminals to the at least one terminal, wherein the PUCCH parameters of different terminals from the respective HARQ feedback terminals are different .

The PUCCH parameter includes a parameter to time and a PUCCH resource _PRI indicator Δ; the time parameter k is configured to calculate a timing of transmission of the HARQ feedback, and the PUCCH resource indicator _∆PRI is configured to calculate a PUCCH resource sequence number for transmitting the HARQ feedback in the PUCCH resource set; wherein the PUCCH resource set is a set of possible PUCCH resources configured with high-level signaling.

Optionally, the processor is configured such that the PUCCH parameters of the respective HARQ feedback terminals include a common time parameter k shared by the HARQ feedback terminals and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal; or

the PUCCH parameters of the respective HARQ feedback terminals include a time parameter k of each HARQ feedback terminal and a common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals; or

the PUCCH parameters of the respective HARQ feedback terminals include a time parameter of each HARQ feedback terminal and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal.

Optionally, the processor is configured such that when the PUCCH parameters of the respective HARQ feedback terminals include a common time parameter shared by the HARQ feedback terminals and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal,

the common time parameter k shared by the HARQ feedback terminals is sent on the PDCCH of the Msg.B message, and

the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal is transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, the processor is configured such that when the PUCCH parameters of the respective HARQ feedback terminals include the time parameter k of each HARQ feedback terminal and the common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals,

the common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals is transmitted on the PDCCH of the Msg.B message, and

the time parameter k of each HARQ feedback terminal is transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, the processor is configured such that when the PUCCH parameters of the respective HARQ feedback terminals include the time parameter k of each HARQ feedback terminal and the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal,

the time parameter k of each HARQ feedback terminal and the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal are transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, the processor is also configured to perform the following: before receiving the HARQ feedback sent by each HARQ feedback terminal for the Msg.B message in the HARQ feedback resource of each HARQ feedback terminal, obtaining information about the PUCCH resource offset of each HARQ feedback terminal based on offset configuration information, wherein the PUCCH resource offset information is configured to indicate a PUCCH resource offset for HARQ feedback with respect to the PUCCH reference resource, and the PUCCH reference resource is a PUCCH resource calculated based on the PUCCH resource indicator _ΔPRI ; And

determining a HARQ feedback resource of each HARQ feedback terminal based on the PUCCH resource offset information of each HARQ feedback terminal.

Optionally, the processor is configured such that the PUCCH resource offset information includes PUCCH resource offset information for each random access preamble sequence, and obtaining the PUCCH resource offset information of each HARQ feedback terminal based on the offset configuration information includes: obtaining the offset information the PUCCH resource of each HARQ feedback terminal by requesting offset configuration information based on the preamble sequence included in the Msg.A message transmitted by each HARQ feedback terminal.

Optionally, the processor is configured such that the Msg.B message contains private information of each said at least one terminal, and the offset configuration information includes PUCCH resource offset information corresponding to the location where the private information is in the Msg.B message; and obtaining the PUCCH resource offset information of each HARQ feedback terminal based on the offset configuration information includes:

obtaining the PUCCH resource offset information of each HARQ feedback terminal by requesting the offset configuration information based on the private information location of each HARQ feedback terminal in the Msg.B message.

Optionally, the processor is also configured to broadcast the offset configuration information before returning the Msg.B message to the at least one terminal.

Optionally, the Msg.A message includes a random access preamble sequence and a PUSCH. The HARQ feedback terminal is a terminal for which the base station detects the corresponding preamble sequence and successfully parses the content in the PUSCH.

Optionally, said at least one terminal also contains corresponding retransmission terminals, wherein the retransmission terminal is a terminal for which the base station detects the corresponding preamble sequence and cannot parse the content in the PUSCH. The Msg.B message is also configured to indicate the retransmission resource of each retransmission terminal.

The processor is also configured to receive a PUSCH in the Msg.A message of each retransmission terminal, which is retransmitted by each retransmission terminal in the retransmission resource of each retransmission terminal. Each retransmission terminal is any of the respective retransmission terminals.

An embodiment of the invention provides a device for HARQ feedback that can implement all or part of the steps performed by a target terminal in the embodiment of the invention shown in FIG. 4 or FIG. 8 inventions. The HARQ feedback device comprises: a processor and a memory configured to store instructions executable by the processor.

The processor is configured for:

transmitting a first random access message Msg.A to the base station;

receiving a second random access message Msg.B returned by the base station, the Msg.B message configured to indicate a HARQ feedback resource of each HARQ feedback terminal from at least one terminal, and the HARQ feedback resources of the respective HARQ feedback terminals are different; And

transmitting the HARQ feedback to the base station in response to the target terminal being any of the HARQ feedback terminals.

Optionally, the Msg.B message contains the PUCCH parameters of the respective HARQ feedback terminals, wherein the PUCCH parameters of different terminals from the respective HARQ feedback terminals are different.

Before transmitting the HARQ feedback to the base station, in the target terminal's HARQ feedback resource, the processor is also configured to:

extracting the target terminal's PUCCH parameter from the Msg.B message

and obtaining a target terminal HARQ feedback resource based on the target terminal's PUCCH parameter.

The PUCCH parameter includes a parameter to time and a PUCCH resource _PRI indicator Δ; parameter-to-time is configured to calculate the timing of the HARQ feedback transmission, and the PUCCH resource indicator Δ _PRI is configured to calculate the PUCCH resource sequence number for the HARQ feedback in the PUCCH resource set, the PUCCH resource set being the set of possible PUCCH resources configured with using high-level signaling.

Optionally, the PUCCH parameters of the respective HARQ feedback terminals include a common time parameter shared by the HARQ feedback terminals and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal; or

the PUCCH parameters of the respective HARQ feedback terminals include a time parameter of each HARQ feedback terminal and a common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals; or

the PUCCH parameters of the respective HARQ feedback terminals include the parameter to the time of each HARQ feedback terminal and the indicator

∆ _PRI of the PUCCH resource of each HARQ feedback terminal.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include a common time parameter shared by the HARQ feedback terminals and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal,

the common time parameter k shared by the HARQ feedback terminals is sent on the PDCCH of the Msg.B message, and

the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal is transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include the time parameter k of each HARQ feedback terminal and the common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals,

the common PUCCH resource indicator Δ _PRI shared by the HARQ feedback terminals is transmitted on the PDCCH of the Msg.B message, and

the time parameter k of each HARQ feedback terminal is transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, when the PUCCH parameters of the respective HARQ feedback terminals include the time parameter of each HARQ feedback terminal and the PUCCH resource indicator _∆PRI of each HARQ feedback terminal,

the time parameter k of each HARQ feedback terminal and the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal are transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message.

Optionally, before transmitting the HARQ feedback to the base station in the target terminal's HARQ feedback resource, the processor is also configured to:

obtaining PUCCH resource offset information of the target terminal based on the offset configuration information, wherein the PUCCH resource offset information is configured to indicate a PUCCH resource offset for HARQ feedback with respect to the PUCCH reference resource, and the PUCCH reference resource is a PUCCH resource calculated based on indicator Δ _PRI resource PUCCH; And

determining a target terminal HARQ feedback resource based on the target terminal PUCCH resource offset information.

Optionally, the processor is configured such that the offset configuration information includes PUCCH resource offset information corresponding to each random access preamble sequence;

obtaining the target terminal PUCCH resource offset information based on the offset configuration information includes:

obtaining the offset information of the PUCCH resource of the target terminal by requesting the offset configuration information based on the preamble sequence in the Msg.A message sent by the target terminal.

Optionally, the Msg.B message contains the private information of each said at least one terminal, and the offset configuration information includes PUCCH resource offset information corresponding to the location of the private information in the Msg.B message;

obtaining the target terminal PUCCH resource offset information based on the offset configuration information includes:

obtaining the target terminal's PUCCH resource offset information by requesting the offset configuration information based on the location of the target terminal's private information in the Msg.B message.

Optionally, before transmitting the Msg.A message to the base station, the processor is also configured to: receive the offset configuration information broadcast by the base station.

Optionally, the Msg.A message includes a random access preamble sequence and a PUSCH. The HARQ feedback terminal is a terminal for which the base station detects the corresponding preamble sequence and successfully parses the content in the PUSCH.

Optionally, the Msg.B message is also configured to indicate the retransmission resource of each retransmission terminal of said at least one terminal, wherein each retransmission terminal is a terminal for which the base station detects the corresponding preamble sequence and cannot parse the content in the PUSCH . The processor is also configured to retransmit the PUSCH in the Msg.A message in the target terminal's retransmission resource in response to the target terminal being any of the corresponding retransmission terminals.

Above, the base station and the target terminal have been mainly discussed as examples for presenting the solution according to the embodiments of the invention. It is understood that in order to implement the above functions, the base station and the target terminal include hardware structures and/or software modules corresponding to each function. In combination with the modules and algorithm steps of the examples described in the embodiments of the invention, the embodiments of the invention may be implemented in hardware or a combination of hardware and computer software. Whether a particular function is performed by hardware or by hardware controlled by computer software depends on the particular application and the terms of the design constraints of the technical solution.

Fig. 11 is a diagram of a base station according to an embodiment of the invention.

Base station 1100 includes a communications unit 1104 and a processor 1102. Processor 1102 may also be a controller, which is represented as "controller/processor 1102" in FIG. 11. Communication unit 1104 is configured to support communication of the base station with other network devices (eg, terminals, other base stations, and gateways).

In addition, base station 1100 may also include memory 1103, wherein memory 1103 is configured to store program codes and data of base station 1100.

It is clear that in Fig. 11 shows only a simplified design of base station 1100. In practical applications, base station 1100 may include any number of processors, controllers, memories, and communication units, and all base stations that may implement embodiments of the invention are within the scope of the embodiments of the invention.

Fig. 12 is a diagram of a terminal according to an embodiment of the invention.

Terminal 1200 includes a communications unit 1204 and a processor 1202. Processor 1202 may also be a controller, which is represented as "controller/processor 1202" in FIG. 12. Communication unit 1204 is configured to support communication of the terminal with other network devices (eg, terminals, other base stations, and gateways).

In addition, terminal 1200 may also include a memory 1203, wherein memory 1203 is configured to store program codes and data of terminal 1200.

It is clear that in Fig. 12 shows only a simplified design of terminal 1200. In practical applications, terminal 1200 may include any number of processors, controllers, memories, and communication units, and all terminals that may implement embodiments of the invention are within the scope of the embodiments of the invention.

Those skilled in the art will be aware that, in one or more of the above examples, the functions described in the embodiments of the invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, these functions may be stored on a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. A computer-readable medium includes a computer storage medium and a communication medium, where the communication medium includes any medium capable of transferring a computer program from one place to another. A storage medium may be any available medium that can be accessed by a general purpose or special purpose computer.

Embodiments of the invention also provide a computer storage medium for storing instructions for computer software used by the base station described above and including a program configured to perform the HARQ feedback method.

Embodiments of the invention also provide a computer storage medium for storing instructions for computer software used by the terminal described above and including a program for executing the HARQ feedback method.

Other embodiments of the invention will be apparent to those skilled in the art from a consideration of the description and use of the invention disclosed herein. This application is intended to cover any variation, use, or adaptation of the invention in accordance with its general principles, including such departures from the invention as are known or common practice in the art. It is intended that the description and examples be regarded as illustrative only, and that the scope and spirit of the invention be defined by the claims.

It should be understood that the invention is not limited to the precise construction as described above and illustrated in the accompanying drawings, and various modifications and changes may be made within the scope of the invention. It is intended that the scope of the invention be limited only by the appended claims.

Claims (52)

1. A hybrid automatic repeat request (HARQ) feedback method performed by a base station and comprising: returning a second random access message Msg.B to at least one terminal after receiving a first random access message Msg.A transmitted by each of said at least one terminal, wherein the Msg.B message is configured to indicate the HARQ feedback resource of each HARQ feedback terminal from said at least one terminal, wherein the HARQ feedback resources of the respective HARQ feedback terminals are different and the Msg.B message contains the physical uplink control channel (PUCCH) parameters of the respective HARQ feedback terminals; And receiving the HARQ feedback sent by each HARQ feedback terminal for the Msg.B message in the HARQ feedback resource of each HARQ feedback terminal. 2. The method of claim 1, wherein returning a Msg.B message to said at least one terminal includes: returning a Msg.B message containing the PUCCH parameters of the respective HARQ feedback terminals to the at least one terminal; wherein the PUCCH parameters include a time parameter k and a PUCCH resource _PRI indicator Δ; the time parameter k is configured to calculate the timing of the HARQ feedback, and the PUCCH resource indicator _ΔPRI is configured to calculate the PUCCH resource sequence number for the HARQ feedback in the PUCCH resource set, the PUCCH resource set being the set of possible PUCCH resources configured with high level alarm. 3. The method according to claim 2, in which the PUCCH parameters of the respective HARQ feedback terminals include a time parameter k of each HARQ feedback terminal; and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal. 4. The method according to claim 3, in which the time parameter k of each HARQ feedback terminal and the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal are transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message. 5. The method of claim 1, comprising, before receiving the HARQ feedback sent by each HARQ feedback terminal for the Msg.B message in the HARQ feedback resource of each HARQ feedback terminal: obtaining PUCCH resource offset information of each HARQ feedback terminal based on the offset configuration information, wherein the PUCCH resource offset information is configured to indicate a PUCCH resource offset for HARQ feedback relative to the PUCCH reference resource, and the PUCCH reference resource is a PUCCH resource, calculated based on the PUCCH resource _PRI indicator Δ; And determining a HARQ feedback resource of each HARQ feedback terminal based on the PUCCH resource offset information of each HARQ feedback terminal. 6. The method of claim 5, wherein the offset configuration information includes information on a PUCCH resource offset of each random access preamble sequence, and obtaining the PUCCH resource offset information of each HARQ feedback terminal based on the offset configuration information includes: obtaining the PUCCH resource offset information of each HARQ feedback terminal by requesting the offset configuration information based on the preamble sequence included in the Msg.A message transmitted by each HARQ feedback terminal. 7. The method of claim 5, wherein the Msg.B message contains corresponding private information of said at least one terminal, and the offset configuration information contains PUCCH resource offset information corresponding to the location where the private information is in the Msg.B message. ; And obtaining the PUCCH resource offset information of each HARQ feedback terminal based on the offset configuration information includes: obtaining the PUCCH resource offset information of each HARQ feedback terminal by requesting the offset configuration information based on the private information location of each HARQ feedback terminal in the Msg.B message. 8. HARQ feedback method applicable in the target terminal and including: transmission of the first random access message Msg. And to the base station; receiving a second random access message Msg.B returned by the base station, wherein the Msg.B message is configured to indicate the HARQ feedback resource of each HARQ feedback terminal from said at least one terminal, wherein the HARQ feedback resources of the respective HARQ feedback terminals are different and the Msg.B message contains the physical uplink control channel (PUCCH) parameters of the respective HARQ feedback terminals; And transmitting the HARQ feedback to the base station in response to the target terminal being any of the corresponding HARQ feedback terminals. 9. The method of claim 8, wherein the Msg.B message contains the PUCCH parameters of the respective HARQ feedback terminals, wherein the PUCCH parameter includes the time parameter k and the PUCCH resource indicator _ΔPRI ; the time parameter k is configured to calculate the timing of the HARQ feedback, and the PUCCH resource indicator _∆PRI is configured to calculate the PUCCH resource sequence number for the HARQ feedback in the PUCCH resource set, the PUCCH resource set being the set of possible PUCCH resources configured with using high-level signaling. 10. The method according to claim 9, in which the PUCCH parameters of the respective HARQ feedback terminals include a time parameter k of each HARQ feedback terminal; and a PUCCH resource indicator _ΔPRI of each HARQ feedback terminal. 11. The method according to claim 10, in which the time parameter k of each HARQ feedback terminal and the PUCCH resource indicator _ΔPRI of each HARQ feedback terminal are transmitted in the private information of each HARQ feedback terminal, and the private information of each HARQ feedback terminal is transmitted in the PDSCH of the Msg.B message. 12. The method of claim 8, further comprising, before transmitting the HARQ feedback to the base station in the target terminal's HARQ feedback resource: obtaining target terminal PUCCH resource offset information based on the offset configuration information, wherein the PUCCH resource offset information is configured to indicate a HARQ feedback PUCCH resource offset relative to the PUCCH reference resource, and the PUCCH reference resource is a PUCCH resource calculated based on indicator Δ _PRI resource PUCCH; And determining a target terminal HARQ feedback resource based on the target terminal PUCCH resource offset information. 13. The method of claim 12, wherein the offset configuration information comprises PUCCH resource offset information of each random access preamble sequence; And obtaining the target terminal PUCCH resource offset information based on the offset configuration information includes: obtaining the offset information of the PUCCH resource of the target terminal by requesting the offset configuration information based on the preamble sequence in the Msg.A message sent by the target terminal. 14. The method of claim 12, wherein the Msg.B message contains private information of each said at least one terminal, and the offset configuration information contains PUCCH resource offset information corresponding to the location of the private information in the Msg.B message; And obtaining the target terminal PUCCH resource offset information based on the offset configuration information includes: obtaining the target terminal's PUCCH resource offset information by requesting the offset configuration information based on the location of the target terminal's private information in the Msg.B message. 15. Base station, comprising: processor and a memory configured to store instructions executable by the processor; wherein the processor is configured for: returning a second random access message Msg.B to at least one terminal after receiving a first random access message Msg.A transmitted by each of said at least one terminal, wherein the Msg.B message is configured to indicate the HARQ feedback resource of each HARQ feedback terminal from said at least one terminal, wherein the HARQ feedback resources of the respective HARQ feedback terminals are different and the Msg.B message contains the physical uplink control channel (PUCCH) parameters of the respective HARQ feedback terminals; And receiving the HARQ feedback sent by each HARQ feedback terminal for the Msg.B message in the HARQ feedback resource of each HARQ feedback terminal. 16. User terminal, containing: processor and a memory configured to store instructions executable by the processor; wherein the processor is configured for: transmitting a first random access message Msg.A to the base station; receiving a second random access message Msg.B returned by the base station, wherein the Msg.B message is configured to indicate the HARQ feedback resource of each HARQ feedback terminal from the at least one terminal, wherein the HARQ feedback resources of the respective HARQ feedback terminals are different and the Msg.B message contains the physical uplink control channel (PUCCH) parameters of the respective HARQ feedback terminals; And transmitting the HARQ feedback to the base station in response to the user terminal being any of the corresponding HARQ feedback terminals.

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