CN110809868A

CN110809868A - HARQ feedback transmission method and device, communication equipment and storage medium

Info

Publication number: CN110809868A
Application number: CN201980002112.1A
Authority: CN
Inventors: 李明菊
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2019-09-19
Filing date: 2019-09-19
Publication date: 2020-02-18
Anticipated expiration: 2039-09-19
Also published as: CN110809868B; WO2021051363A1

Abstract

The embodiment of the application discloses a HARQ feedback transmission method and device, communication equipment and a computer storage medium. The HARQ feedback transmission method comprises the following steps: determining a sending sequence of HARQ feedback according to data types of a plurality of Physical Downlink Shared Channel (PDSCH) data to be sent for HARQ feedback, wherein the data types comprise: newly transmitted data and retransmitted data; and transmitting the HARQ feedback according to the sending sequence.

Description

HARQ feedback transmission method and device, communication equipment and storage medium

Technical Field

The present disclosure relates to the field of wireless communications technologies, but not limited to the field of wireless communications technologies, and in particular, to a method and an apparatus for HARQ feedback transmission, a communication device, and a computer storage medium.

Background

In a 5G New Radio over the air (NR) communication system, there is data (hereinafter referred to as PDSCH data) that a base station transmits to a terminal through multiple transmission time units (a time unit may be a time slot or a micro time slot) and/or Physical Downlink Shared Channels (PDSCHs) of multiple serving cells, and the terminal needs to transmit Hybrid Automatic Repeat reQuest (HARQ) feedback of the multiple PDSCH data on the same Physical Uplink Control Channel (PUCCH) resource. However, in the related art, if a plurality of HARQ feedback bits fed back by the terminal do not have a specified corresponding relationship with a plurality of PDSCH data, the base station may not correctly know which PDSCH data corresponds to each HARQ feedback bit after receiving the HARQ feedback, thereby causing low transmission efficiency and large HARQ feedback transmission delay.

Disclosure of Invention

The embodiment of the application discloses a HARQ feedback transmission method and device, communication equipment and a computer storage medium.

A first aspect of an embodiment of the present application provides a method for HARQ feedback transmission, including:

determining a sending sequence of HARQ feedback according to data types of a plurality of Physical Downlink Shared Channel (PDSCH) data to be sent for HARQ feedback, wherein the data types comprise: newly transmitted data and retransmitted data;

and transmitting the HARQ feedback according to the sending sequence.

Based on the above scheme, the determining the transmission sequence of the HARQ feedback according to the data type of the PDSCH data of the multiple physical downlink shared channels to be sent and fed back includes:

when the PDSCH data simultaneously contains new transmission data and retransmission data, determining that the transmission sequence of the HARQ feedback of the retransmission data is positioned before the transmission sequence of the HARQ feedback of the new transmission data.

Based on the above scheme, the determining the transmission sequence of the HARQ feedback according to the data type of the PDSCH data of the multiple physical downlink shared channels fed back by the HARQ to be transmitted further includes:

and when at least two pieces of PDSCH data are newly transmitted data and/or at least two pieces of PDSCH data are retransmitted data, determining the transmission sequence of the HARQ feedback according to the HARQ process numbers of at least two pieces of PDSCH data of the same type.

Based on the above scheme, the determining the transmission sequence of the HARQ feedback according to the HARQ process number of the HARQ feedback includes:

and determining the sending sequence of the HARQ feedback according to the HARQ process number, wherein the sending sequence is ordered from small to large according to the HARQ process number.

and determining the transmission sequence of the HARQ feedback according to the data types of the PDSCH data aiming at the PDSCH data transmitted by different transmission receiving points of the same service cell at the same transmission time.

Based on the above scheme, the method further comprises:

when the sending time of the PDSCH data is different, determining the sending sequence of the HARQ feedback according to the sending time sequence of the PDSCH data;

and when the transmission time of the PDSCH data is the same and the PDSCH data comes from different serving cells, determining the transmission sequence of the HARQ feedback according to the cell numbers of the serving cells of the PDSCH data.

Based on the above scheme, the determining the transmission order of the HARQ feedback according to the cell numbers of the serving cells of the multiple PDSCH data includes:

and determining the sending sequence of the HARQ feedback according to the cell number of the serving cell, wherein the sending sequence is ordered from small to large according to the cell number.

Based on the above scheme, the method further comprises:

transmitting a plurality of PDSCH data and a counting downlink allocation index (C-DAI) and a total counting downlink allocation index (T-DAI), wherein the C-DAI is used for indicating the current sequencing of PDSCHs for transmitting the PDSCH data; the T-DAI is used for indicating the total number of PDSCHs for sending PDSCH data; wherein the receiving condition of the PDSCH data, the C-DAI and the T-DAI are jointly used for generating the HARQ feedback;

wherein the C-DAI and the T-DAI are used for joint counting of PDSCH data transmitted by a plurality of sending receiving points; the bit number of the C-DAI is greater than or equal to 3; and/or the bit number of the T-DAI is greater than or equal to 3.

A second aspect of the embodiments of the present application provides a hybrid automatic repeat request HARQ feedback transmission apparatus, including:

a first determining module, configured to determine a transmission order of HARQ feedback according to data types of multiple physical downlink shared channel PDSCH data to be sent for HARQ feedback, where the data types include: newly transmitted data and retransmitted data;

a transmission module configured to transmit the HARQ feedback according to the transmission order.

Based on the above scheme, the first determining module is configured to determine that the transmission order of the HARQ feedback of the retransmitted data is before the transmission order of the HARQ feedback of the new transmitted data when the PDSCH data contains both new transmitted data and retransmitted data.

Based on the above scheme, the first determining module is configured to determine the sending sequence of the HARQ feedback according to HARQ process numbers of at least two PDSCH data of the same type when at least two PDSCH data are both new data and/or at least two PDSCH data are both retransmission data.

Based on the above scheme, the first determining module is configured to determine, according to the HARQ process number, that the transmission order of the HARQ feedback is ordered from small to large according to the HARQ process number.

Based on the above scheme, the first determining module is configured to determine, according to data types of a plurality of PDSCH data, a transmission order of the HARQ feedback for the plurality of PDSCH data transmitted by different transmission/reception points of the same serving cell at the same transmission time.

Based on the above scheme, the apparatus further comprises:

a second determining module configured to determine a transmission order of the HARQ feedback according to a transmission time sequence of the PDSCH data when transmission times of the PDSCH data are different; and when the transmission time of the PDSCH data is the same and the PDSCH data comes from different serving cells, determining the transmission sequence of the HARQ feedback according to the cell numbers of the serving cells of the PDSCH data.

Based on the above scheme, the second determining module is configured to determine, according to the cell number of the serving cell, that the transmission order of the HARQ feedback is ordered from small to large according to the cell number.

Based on the above scheme, the device further comprises:

a transmission module configured to transmit a plurality of the PDSCH data and a counted downlink assignment index C-DAI and a total counted downlink assignment index T-DAI, wherein the C-DAI is used to indicate a current ordering of a PDSCH transmitting the PDSCH data; the T-DAI is used for indicating the total number of PDSCHs for sending PDSCH data; wherein the receiving condition of the PDSCH data, the C-DAI and the T-DAI are jointly used for generating the HARQ feedback;

A third aspect of the embodiments of the present application provides a communication device, including:

a transceiver;

a memory;

and the processor is respectively connected with the transceiver and the memory, and is configured to control the transceiver to receive and transmit wireless signals by executing the computer-executable instructions stored in the memory, and implement the HARQ feedback transmission method provided in any technical scheme of the first aspect.

A fourth aspect of the embodiments of the present application provides a computer storage medium, where the computer storage medium stores computer-executable instructions, and after the computer-executable instructions are executed by a processor, the HARQ feedback transmission method provided in any technical solution of the first aspect can be implemented.

According to the technical scheme provided by the embodiment of the application, the sending sequence of the HARQ feedback is determined according to the data type of the PDSCH data to be sent and fed back, wherein the data type of the PDSCH data to be sent and fed back is retransmission data or new transmission data; on the other hand, the two parties of receiving and transmitting the HARQ feedback know the rule for determining the transmission sequence of the HARQ feedback in advance, the transmission sequence of the HARQ feedback does not need to be negotiated temporarily, and the time and signaling cost required by the negotiation of the transmission sequence of the HARQ feedback are reduced, so that the time delay of the HARQ feedback is reduced, the retransmission time delay caused by the time delay of the HARQ feedback is further reduced, and the characteristic of small retransmission time delay is achieved.

Drawings

Fig. 1 is a schematic structural diagram of a wireless communication system according to an embodiment of the present application;

fig. 2 is a flowchart illustrating a HARQ feedback transmission method according to an embodiment of the present application;

FIG. 3 is a diagram of PDSCH data, C-DAI and T-DAI according to an embodiment of the present disclosure;

fig. 4 is a schematic diagram of HARQ feedback provided in an embodiment of the present application;

fig. 5 is a schematic diagram of PDSCH data provided in an embodiment of the present application;

fig. 6 is a schematic diagram of HARQ feedback provided in an embodiment of the present application;

fig. 7 is a schematic structural diagram of an HARQ feedback transmission apparatus according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a base station according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a terminal according to an embodiment of the present application.

Detailed Description

The network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not constitute a limitation to the technical solution provided in the embodiment of the present application, and it can be known by a person skilled in the art that the technical solution provided in the embodiment of the present application is also applicable to similar technical problems along with the evolution of the network architecture and the appearance of a new service scenario.

Please refer to fig. 1, which illustrates a schematic structural diagram of a wireless communication system according to an embodiment of the present application. As shown in fig. 1, the wireless communication system is a communication system based on a cellular mobile communication technology, and may include: several terminals 10 and several base stations 20.

Terminal 10 may refer to, among other things, a device that provides voice and/or data connectivity to a user. The terminal 10 may communicate with one or more core networks via a Radio Access Network (RAN), and the terminal 10 may be an internet of things terminal such as a sensor device, a mobile phone (or "cellular" phone), and a computer having the internet of things terminal, and may be a fixed, portable, pocket, handheld, computer-included, or vehicle-mounted device, for example. For example, a Station (STA), a subscriber unit (subscriber unit), a subscriber Station (subscriber Station), a mobile Station (mobile Station), a remote Station (remote Station), an access point, a remote terminal (remote), an access terminal (access terminal), a user equipment (user terminal), a user agent (user agent), a user equipment (user device), or a user terminal (user equipment, terminal). Alternatively, the terminal 10 may be a device of an unmanned aerial vehicle. Alternatively, the terminal 10 may be a vehicle-mounted device, for example, a driving computer with a wireless communication function, or a wireless communication device externally connected to the driving computer. Alternatively, the terminal 10 may be a roadside device, for example, a street lamp, a signal lamp or other roadside device having a wireless communication function.

The base station 20 may be a network side device in a wireless communication system. The wireless communication system may be a fourth generation mobile communication (4G) system, which is also called a Long Term Evolution (LTE) system; alternatively, the wireless communication system can be a 5G system, which is also called a New Radio (NR) system or a 5G NR system. Alternatively, the wireless communication system may be a next-generation system of a 5G system. Among them, the Access Network in the 5G system may be referred to as NG-RAN (New Generation-Radio Access Network, New Generation Radio Access Network).

The base station 20 may be an evolved node b (eNB) used in a 4G system. Alternatively, the base station 20 may be a base station (gNB) adopting a centralized distributed architecture in the 5G system. When the base station 20 adopts a centralized distributed architecture, it generally includes a Centralized Unit (CU) and at least two Distributed Units (DU). A Packet Data Convergence Protocol (PDCP) layer, a Radio Link layer Control Protocol (RLC) layer, and a Media Access Control (MAC) layer are provided in the central unit; a Physical (PHY) layer protocol stack is disposed in the distribution unit, and the embodiment of the present application does not limit the specific implementation manner of the base station 20. When the communication scene of the vehicle networking is adopted, the base station can also be a vehicle network device and is communicated with the terminal device which is the vehicle networking device.

The base station 20 and the terminal 10 may establish a radio connection over a radio air interface. In various embodiments, the wireless air interface is based on a fourth generation mobile communication network technology (4G) standard; or the wireless air interface is based on a fifth generation mobile communication network technology (5G) standard, for example, the wireless air interface is a new air interface; alternatively, the wireless air interface may be a wireless air interface based on a 5G next generation mobile communication network technology standard.

In some embodiments, an E2E (End-to-End) or D2D (Device-to-Device) connection may also be established between the terminals 10. Scenarios such as V2V (vehicle to vehicle) communication, V2I (vehicle to Infrastructure) communication, and V2P (vehicle to vehicle) communication in vehicle networking communication (V2X).

In some embodiments, the wireless communication system may further include a network management device 13.

Several base stations 20 are connected to the network management device 13, respectively. The network Management device 13 may be a Core network device in a wireless communication system, for example, the network Management device 13 may be a Mobility Management Entity (MME) in an Evolved Packet Core (EPC). Alternatively, the Network management device may also be other core Network devices, such as a Serving GateWay (SGW), a Public Data Network GateWay (PGW), a Policy and Charging Rules Function (PCRF), a Home Subscriber Server (HSS), or the like. The embodiment of the present application is not limited to the implementation form of the network management device 13.

As shown in fig. 2, the present embodiment provides a HARQ feedback transmission method, including:

s110: determining a sending sequence of HARQ feedback according to data types of a plurality of Physical Downlink Shared Channel (PDSCH) data to be sent for HARQ feedback, wherein the data types comprise: newly transmitted data and retransmitted data;

s120: and transmitting the HARQ feedback according to the sending sequence.

The HARQ feedback transmission method provided in this embodiment may be applied to both the receiving end and the transmitting end of the HARQ feedback.

In this embodiment of the present application, the receiving end of the HARQ feedback is a base station, and the transmitting end of the HARQ feedback is a terminal. The terminal may be various types of terminals, such as a common terminal such as a mobile phone or a wearable device, and for example, the terminal may also be a Machine-Type Communications (MTC) terminal.

The PDSCH data is as follows: the data transmitted by the PDSCH is generally downlink data transmitted by the base station to the terminal.

When the HARQ feedback transmission method is applied to a terminal, the S120 may include: and sending the HARQ feedback according to the sending sequence.

When the HARQ feedback transmission method is applied to a base station, the S120 may include: and receiving the HARQ feedback according to the sending sequence. Or after receiving the HARQ feedback, the base station determines the PDSCH data to which each HARQ feedback is directed according to the data type of the PDSCH data.

The HARQ feedback includes: an Acknowledgement (ACK) and a Negative Acknowledgement (NACK).

Wherein the ACK is used for indicating that the corresponding PDSCH data is successfully received; the NACK indicating unsuccessful reception of corresponding PDSCH data.

One said HARQ feedback may be represented by one bit (bit). For example, if the bit value of one HARQ feedback bit is "1", the ACK is indicated, and if the bit value of the bit is "0", the NACK is indicated. For another example, if the bit value of one HARQ feedback bit is "0", the ACK is indicated, and if the bit value of the bit is "1", the NACK is indicated.

Thus, if the base station transmits M PDSCH data, the terminal needs to feed back M HARQ feedback bits.

In the embodiment of the present application, the types of PDSCH data to be subjected to HARQ feedback are distinguished, specifically: retransmitted data and newly transmitted data.

In the embodiment of the present application, the transmission order of the HARQ feedback bits is determined in combination with whether the HARQ feedback is for retransmitted data or newly transmitted data.

For example, 2 PDSCH data all need to have their HARQ feedback sent; wherein, one PDSCH data is retransmission data, the other PDSCH data is new transmission data, and the HARQ feedback sending sequence of the two PDSCH data is determined according to the retransmission data or the new transmission data.

For example, if the HARQ feedback of the retransmission data is transmitted preferentially, the transmission order of the HARQ feedback of the retransmission data is prior to that of the HARQ feedback of the newly transmitted data. Here, the HARQ feedback bits of the PDSCH data form one bit sequence, and the transmission order is preceded by: the HARQ feedback bit is located at the high bit of the bit sequence, and the transmission sequence is as follows: the HARQ feedback bits are at the low bits of the bit sequence. For example, if 4 HARQ feedbacks of 4 PDSCH data need to be fed back, if there are 2 retransmission data and 2 new transmission data in the 4 PDSCH data, the 4 bits corresponding to the 4 HARQ feedbacks form a bit sequence, the HARQ feedback of the retransmission data occupies the first 2 (i.e., high-order) bits of the bit sequence, and the HARQ feedback of the new transmission data occupies the second 2 (i.e., low-order) bits of the bit sequence.

The newly transmitted data is data transmitted for the first time, and in the embodiment of the present application, the newly transmitted data is PDSCH data transmitted for the first time. The retransmission data is data to be transmitted again, and in this embodiment, the retransmission data is PDSCH data transmitted 2 times or more than 2 times.

In summary, in the embodiment of the present application, both the transceiver and the receiver of the HARQ feedback determine the transmission sequence of the HARQ feedback bits according to the data type of the PDSCH data, so as to reduce the problems of confusion caused by random transmission or delay and high signaling overhead caused by temporary negotiation, and have the characteristics of high receiving accuracy and small delay in the HARQ feedback transmission.

In some embodiments, the S110 may include:

When a plurality of PDSCH data are transmitted simultaneously and different Transmission Reception Points (TRPs) from the same serving cell, the Transmission order of HARQ feedback is determined according to the data type of the PDSCH data.

In some embodiments, the S110 may include: when the PDSCH data simultaneously contains new transmission data and retransmission data, determining that the transmission sequence of the HARQ feedback of the retransmission data is positioned before the transmission sequence of the HARQ feedback of the new transmission data.

In the embodiment of the application, the sending sequence of the HARQ feedback of the retransmitted data is located before the HARQ feedback of the newly transmitted data, so that the earlier the HARQ feedback of the data which is transmitted for the first time is sent, and the phenomenon that the average delay of all HARQ feedback is large on the whole due to the fact that the sending position of the HARQ feedback of the retransmitted data is located behind the sending position of the HARQ feedback of the newly transmitted data is reduced.

In some embodiments, it may occur that the two PDSCH data are of the same type of data, e.g., that two retransmitted data occur or that two newly transmitted data occur.

In some embodiments, if the PDSCH data is 3 or more than 3, two or more PDSCH data may occur simultaneously as the same type of data, for example, two or more retransmission data may occur, or two or more new transmission data may occur.

In some embodiments, the S120 may include:

when at least two pieces of PDSCH data are newly transmitted data, determining the sending sequence of the HARQ feedback according to the HARQ process numbers of at least two pieces of PDSCH data of the same type;

and when at least two pieces of PDSCH data are retransmission data, determining the sending sequence of the HARQ feedback according to the HARQ process numbers of at least two pieces of PDSCH data of the same type.

The HARQ process numbers are used to distinguish different HARQ processes, and data with the same process number indicates repeated transmission of the same data, so that combining processing can be performed. The HARQ process number is the number of the HARQ process.

For example, different sending and receiving points of the same serving cell send 4 PDSCH data to the terminal in the same time scheduling unit, where 1 retransmitted data and 3 newly transmitted data. Then the terminal needs to feed back the HARQ feedback bit sequence of 4 bits for the 4 PDSCH data, and when determining the transmission order of the HARQ feedback, the terminal ranks the transmission order of the HARQ feedback of the retransmitted data before the transmission order of the HARQ feedback of the 3 newly transmitted data. For the HARQ feedback of the 3 pieces of new transmission data, the transmission sequence of the HARQ feedback is further determined according to the process numbers (i.e., HARQ process numbers) of the HARQ processes corresponding to the 3 pieces of new transmission data, respectively. Here, arranging the transmission order of the HARQ feedback for 1 retransmission data before the HARQ feedback for 3 new transmission data may include: in the HARQ feedback bit sequence composed of 4 bits, the HARQ feedback bit of the retransmission data is arranged at the highest bit, and the remaining 3 low bits are the HARQ feedback bits of the 3 newly transmitted data.

For another example, different sending and receiving points of the same serving cell send 4 PDSCH data to the terminal in the same time scheduling unit, where 2 pieces of retransmission data and 2 pieces of new transmission data. When the terminal performs the transmission sequence ordering of the HARQ feedback, first arrange the transmission sequence of the HARQ feedback of 2 pieces of retransmission data before the HARQ feedback of 2 pieces of newly transmitted data on the whole, that is, the HARQ feedback bit of the retransmission data is located at 2 high-order bit bits of the HARQ feedback bit sequence of 4 bits. The HARQ feedback bit of newly transmitted data is located at the 2 lower bits of the 4-bit HARQ feedback bit sequence. And then when the transmission sequence of the HARQ feedbacks of the 2 pieces of retransmission data is sequenced, sequencing according to the HARQ process numbers of the two pieces of retransmission data. Similarly, when the transmission order of the HARQ feedback of the remaining 2 new transmission data is sorted, the HARQ feedback of the remaining 2 new transmission data is sorted according to the HARQ process numbers of the 2 new transmission data. I.e. the higher of the two bits with the smaller HARQ process number and the lower of the two bits with the larger HARQ process number.

Therefore, the method and the device can not only carry out the sequencing of the sending sequence of the HARQ feedback according to the data type, but also determine the sequencing of the sending sequence of the HARQ feedback by combining the HARQ process numbers of the same type of data, and can simply determine the uniform and unique sending sequence of the HARQ feedback at the receiving and sending ends of the HARQ feedback, thereby reducing the phenomenon of wrong correspondence between the HARQ feedback and PDSCH data caused by disordered HARQ feedback transmission.

In some embodiments, the determining the transmission order of the HARQ feedback according to the HARQ process numbers of the at least two PDSCH data of the same type includes:

In this embodiment of the present application, the HARQ process numbers of at least two PDSCH data of the same type are ordered, and the ordering of the transmission order of the HARQ feedback may be: from large to small, also from small to large.

In some scenarios, when performing HARQ process configuration, HARQ processes are configured from small to large according to HARQ process numbers, and a transmission order of HARQ feedback with a small HARQ process number is preferentially arranged in front, so that the HARQ feedback of PDSCH data that needs to be preferentially transmitted or PDSCH data that is transmitted first can be transmitted first. The fact that the HARQ feedback sequence is ordered before the small HARQ process number means that the HARQ bits corresponding to the PDSCH data with the small HARQ process number are at the high bits of the entire bit sequence, while the HARQ bits corresponding to the PDSCH data with the large HARQ process number are at the low bits of the entire bit sequence.

If the multiple PDSCH data are not transmitted simultaneously, the transmission order of the HARQ feedback can be determined according to the transmission time sequence of the PDSCH data.

In some embodiments, the method further comprises: and when the sending time of the PDSCH data is different, determining the sending sequence of the HARQ feedback according to the sending time sequence of the PDSCH data.

At this time, the transmission sequence of the HARQ feedback of the PDSCH data transmitted first is advanced, and the time when the base station receives the HARQ feedback is advanced, so that the PDSCH data transmitted first can receive the HARQ feedback as soon as possible, so that data repetition can be performed as soon as possible based on the HARQ feedback, and retransmission delay is reduced.

In other embodiments, when the transmission times of the PDSCH data are the same but from different serving cells, the transmission order of the HARQ feedback is determined according to the cell numbers of the serving cells of the PDSCH data.

When the terminal is a connected terminal supporting carrier aggregation and/or dual connectivity, it may be connected to 2 or more serving cells simultaneously, and in this case, multiple PDSCH data with the same transmission time may come from different serving cells. For the transmission sequence of the HARQ feedback of the PDSCH data from different serving cells, the transmission sequence of the HARQ feedback is first determined according to the cell number of the serving cell transmitting the PDSCH data.

In some embodiments, the determining the transmission order of the HARQ feedback according to the cell numbers of the serving cells of the plurality of PDSCH data includes:

and determining the sending sequence of the HARQ feedback according to the cell number of the serving cell, wherein the sending sequence is ordered from small to large according to the cell number. The HARQ feedback sequence is ordered from small to large cell numbers, which means that HARQ bits corresponding to PDSCH data with small serving cell number are at the high bit of the whole HARQ bit sequence, and HARQ bits corresponding to PDSCH data with large serving cell number are at the low bit of the whole HARQ bit sequence.

In other embodiments, the determining the transmission order of the HARQ feedback according to the cell numbers of the serving cells of the plurality of PDSCH data includes:

and determining the sending sequence of the HARQ feedback according to the cell number of the serving cell, wherein the sending sequence is ordered from large to small according to the cell number.

In some embodiments, the method further comprises:

transmitting a plurality of PDSCH data, counting downlink allocation indexes C-DAIs and total counting downlink allocation indexes T-DAIs, wherein the C-DAIs are used for indicating the sequencing of the current PDSCH data sent to the terminal by the base station in all PDSCHs sent to the terminal by the base station in the time scheduling unit; the T-DAI is used to indicate the total number of PDSCH data transmitted by the base station to the terminal until the scheduling time unit, and HARQ feedback of all PDSCH data transmitted by the base station to the terminal in the time scheduling units needs to be transmitted on one PUCCH resource; wherein the receiving condition of the PDSCH data, the C-DAI and the T-DAI are jointly used for generating the HARQ feedback;

When a plurality of serving cells simultaneously transmit PDSCH data to a terminal or a plurality of TRPs simultaneously transmit the PDSCH data to the terminal, the phenomenon that the number of PDSCH data which can be indicated by 2-bit T-DAIs and 2-bit C-DAIs is insufficient exists. Both the 2-bit T-DAI and the 2-bit C-DAI indicate only 4 PDSCH data. However, in the case of multiple serving cells and multiple TRPs, there may be more than 4 PDSCH data transmitted by multiple TRPs of the same serving cell at the same time, so in the embodiment of the present application, it is proposed that both C-DAI and T-DAI are counted by combining multiple TRPs, and therefore, the number of bits of T-DAI and C-DAI is increased at the same time. Specifically, for example, the bit numbers of the T-DAI and the C-DAI respectively exceed 2 bits, and specifically can be 3 bits, 4 bits or 5 bits and the like; in this way, the indication requirement of the PDSCH data in case of multiple serving cells and/or multiple TRPs is met.

The T-DAI and the C-DAI are transmitted in a PDCCH for scheduling PDSCH, so that the terminal receives the T-DAI and the C-DAI before receiving PDSCH data, the terminal knows that the currently received PDSCH data is the number of the PDSCH data, knows the number of the PDSCH data needing to be received together according to the T-DAI, and knows which PDSCH data are missed and which PDSCH data are successfully received by combining the receiving condition. Therefore, the terminal can generate corresponding HARQ feedback based on the T-DAI, the C-DAI and the receiving condition of each PDSCH data. The HARQ feedback for unsuccessfully received PDSCH data is NACK and the HARQ feedback for successfully received PDSCH data is ACK.

In this embodiment, the C-DAI and the T-DAI are used for joint counting of PDSCH data transmitted by multiple sending and receiving points, and are: the C-DAI is used for indicating the current sequence of sequencing each PDSCH data sent by the TRPs; and the T-DAI indicates a count of PDSCH data to be transmitted by a plurality of TRPs in total up to the current time scheduling unit.

As shown in fig. 7, the present embodiment provides an HARQ feedback transmission apparatus, including:

a first determining module 71, configured to determine a transmission order of HARQ feedback according to data types of multiple physical downlink shared channel PDSCH data to be sent for HARQ feedback, where the data types include: newly transmitted data and retransmitted data;

a transmission module 72 configured to transmit the HARQ feedback according to the transmission order.

In some embodiments, the HARQ feedback transmission device may be a device applied to both the transceiver and the transmitter of HARQ feedback.

When the HARQ feedback transmission apparatus is applied to a terminal, the transmission module 72 is configured to transmit the HARQ feedback according to the transmission sequence.

When the HARQ feedback transmission apparatus is applied in a base station, the transmission module 72 is configured to receive the HARQ feedback according to the transmission sequence.

In some embodiments, the first determination module 71 and the transmission module 72 may be program modules; and after being executed by the processor, the program module can realize the determination of the transmission sequence and the transceiving of the HARQ feedback.

In other embodiments, the first determining module 71 and the transmitting module 72 may be a soft-hard combining module; the soft and hard combining module can comprise various programmable arrays; such programmable arrays include, but are not limited to, complex programmable arrays and field programmable arrays.

In still other embodiments, the first determining module 71 and the transmitting module 72 may be pure hardware modules; the pure hardware module may comprise an application specific integrated circuit.

In some embodiments, the first determining module 71 is configured to determine that the transmission order of the HARQ feedback of the retransmission data is before the transmission order of the HARQ feedback of the new transmission data when the PDSCH data contains both new transmission data and retransmission data.

Here, the HARQ feedback bits of the PDSCH data constitute one bit sequence, and the transmission order first means that the bit is located at the higher bit of the bit sequence, and the transmission order last means that the bit is located at the lower bit of the bit sequence.

In some embodiments, the first determining module 71 is configured to determine the transmission order of the HARQ feedback according to HARQ process numbers of at least two PDSCH data of the same type when there are at least two PDSCH data both of new transmission data and/or at least two PDSCH data both of retransmission data. In some embodiments, the first determining module 71 is configured to determine, according to the HARQ process number, that the transmission order of the HARQ feedback is ordered from small to large according to the HARQ process number.

Here, the HARQ feedback bits of the PDSCH data constitute one bit sequence, and the first transmission order means that the bit is located at the higher bit of the bit sequence, and the second transmission order means that the bit is located at the lower bit of the bit sequence.

In some embodiments, the first determining module 71 is configured to determine, for a plurality of PDSCH data transmitted by the same transmission time unit and different transmission receiving points of the same serving cell, a transmission order of the HARQ feedback according to data types of the plurality of PDSCH data.

In some embodiments, the apparatus further comprises:

In some embodiments, the second determining module is configured to determine, according to the cell number of the serving cell, that the transmission order of the HARQ feedback is ordered from small to large according to the cell number.

In some embodiments, the apparatus further comprises:

a transmission module 72 configured to transmit a plurality of PDSCH data, a count downlink assignment index C-DAI and a total count downlink assignment index T-DAI, where the C-DAI is used to indicate the sequence of the current PDSCH data sent by the base station to the terminal in all PDSCHs sent by the base station to the terminal in the time scheduling unit; the T-DAI is used to indicate the total number of PDSCH data transmitted by the base station to the terminal until the scheduling time unit, and HARQ feedback of all PDSCH data transmitted by the base station to the terminal in the time scheduling units needs to be transmitted on one PUCCH resource; wherein the receiving condition of the PDSCH data, the C-DAI and the T-DAI are jointly used for generating the HARQ feedback;

Several examples are provided below in connection with any of the embodiments described above:

example 1:

in a New Radio over the air (NR) communication system, when a base station transmits PDSCH data to the same terminal in multiple time scheduling units (one time scheduling unit is a slot or a mini-slot) and/or multiple serving cells, HARQ feedback of the PDSCH data is transmitted on the same PUCCH channel.

In some embodiments, the HARQ feedback for one PDSCH data may represent NACK and ACK of HARQ feedback with one bit. Such bits for carrying HARQ feedback are referred to as: HARQ feedback bits.

When the HARQ feedbacks of a plurality of PDSCH data are uploaded through the same PUCCH channel resource, the HARQ feedbacks of the PDSCH data and the corresponding HARQ feedback bit positions of the PDSCH data transmitted on each PDSCH are determined according to a certain rule, so that the terminal can determine the HARQ feedbacks corresponding to each PDSCH according to the receiving condition of each PDSCH and feed the HARQ ACK/NACK of the PDSCH data back to the base station.

The base station can also know which PDSCH the bit value of the HARQ feedback of each bit position is for, thereby determining which PDSCHs are correctly received by the terminal and which need to be retransmitted if not correctly received by the terminal. And the rule for determining the HARQ feedback bit position of each PDSCH is: the HARQ feedback bit of the PDSCH data before the transmission time is earlier, and if the transmission times of the PDSCH data are the same, the HARQ feedback bit of the serving cell having the smaller number is earlier. The HARQ feedback bit preceding here means an upper bit belonging to a bit sequence composed of HARQ feedback bits.

In addition, if the terminal misses a certain PDCCH and its scheduled PDSCH, the number of bits fed back may not be the same as the number of PDSCHs sent by the base station to the terminal.

For example, the base station actually transmits 4 PDSCH data, and the terminal should feed back 4 bits of HARQ ACK/NACK for the 4 PDSCH data. And the terminal misses the 2 nd PDSCH data and the corresponding PDCCH for various reasons such as too poor channel conditions. The terminal may assume that the base station has only transmitted 3 PDSCH data to itself. The terminal only feeds back the HARQ ACK/NACK of 3 bits, which may cause misinterpretation between the base station and the terminal, so that the HARQ ACK/NACK feedback is incorrect, and the data base station that does not need to be retransmitted retransmits the data, and the data base station that needs to be retransmitted does not retransmit the data in order to receive the data correctly.

To reduce this problem, a count Downlink Assignment Index (C-DAI) and a Total count Downlink Assignment Index (T-DAI) are introduced. The C-DAI indicates the sequence of the PDSCH data of the currently transmitted data in the multiple PDSCH data transmitted by the base station to the terminal in the current scheduling unit, the T-DAI indicates the total number of the PDSCH data transmitted by the base station to the terminal until the scheduling time unit, and HARQ feedback of all PDSCH data transmitted by the base station to the terminal in the time scheduling units needs to be transmitted on one PUCCH resource.

In this example, the C-DAI and the T-DAI are used for joint counting of PDSCH data for multiple transmit receive point transmissions. For example, for multiple PDSCH data sent to the same terminal by different TRPs in the same serving cell in the same time scheduling unit, C-DAI may be used to respectively indicate the sequence of the current PDSCH data in multiple PDSCHs without distinguishing TRPs, and then T-DAI may be used to indicate the total number of PDSCH data transmitted by the base station to the terminal by the current time point without distinguishing TRPs.

As shown in fig. 3, each PDSCH data transmission carries C-DAI and T-DAI, but does not transmit identification information of TRP carrying PDSCH data. Therefore, when each PDSCH data does not have corresponding TRP identification information, how to determine the position of HARQ feedback bits of PDSCHs of different TRPs in the same serving cell is a problem to be further solved. In view of this, the present example provides a HARQ feedback transmission method for this case, including:

namely, the transmission time of PDSCH data is firstly seen, and the position of the HARQ feedback bit before the transmission time is earlier;

if the sending time is the same, looking at the cell number of the serving cell from which the PDSCH data comes, the position of the HARQ feedback bit is ahead if the number is smaller;

if the cell numbers of the serving cells are the same, the at least two PDSCH data are considered to be from the same serving cell, and the position of the retransmission data is ahead of the position of the HARQ feedback bit of the newly transmitted data;

and if the PDSCH data from the same serving cell are all retransmission data or are all newly transmitted data, determining the positions of HARQ feedback bits according to the HARQ process number of the PDSCH data corresponding to the HARQ feedback. For example, the smaller the HARQ process number, the earlier the position of the HARQ feedback bit, and the larger the HARQ process number, the later the position of the HARQ feedback bit.

In some cases, new data and retransmission data are distinguished, and the position of the HARQ feedback bit is further determined by combining the HARQ process number, which can only be used for the case of multiple PDSCH data transmitted by different TRPs in the same serving cell in the same time scheduling unit.

Here, the HARQ feedback bits of the PDSCH data form one bit sequence, and the position at the top means: the HARQ feedback bit is located at the high bit of the bit sequence, and the backward position means: the HARQ feedback bits are at the low bits of the bit sequence.

Example 2:

under the same serving cell, for PDSCH data of multiple transmission receiving points (multi-TRP), determining the bit (bit) position of HARQ feedback according to the following principle:

the HARQ feedback bit of the retransmission data is in front, and the HARQ feedback bit of the newly transmitted data is behind;

similarly, when data is retransmitted or newly transmitted, the HARQ process (process) number (ID) is smaller before the HARQ process (process) number (ID) is larger after the HARQ process (process) number (ID) is smaller.

As can be seen from fig. 5, PDSCH #1 and PDSCH #2 are simultaneously transmitted with different TRPs of the same serving cell; PDSCH #3 and PDSCH #4 are simultaneously transmitted with different TRPs of the same serving cell.

For the transmission of PDSCH data shown in fig. 5, first, HARQ feedback bits of two PDSCHs of the serving cell #1 are first, and PDSCH #2 is retransmitted, so HARQ feedback bits of PDSCH #2 are first, and HARQ feedback bits of PDSCH #1 are second. For serving cell #2, where both are newly transmitted PDSCHs, they are ordered according to HARQ process ID, so HARQ feedback bit of PDSCH #3 is before and HARQ feedback bit of PDSCH #4 is after. In fig. 6, the 1 st bit from left to right among the 4 bits is the highest bit, and the 4th bit is the lowest bit. After the PDSCH data transmission shown in fig. 5, the HARQ feedback bits of the corresponding PDSCH data may be as shown in fig. 6.

The present example further provides a HARQ feedback transmission method, including increasing a number of bits included in the C-DAI and the T-DAI.

Since both the C-DAI and the T-DAI have only 2 bits in the related art, for example, the C-DAI can only show values of 1, 2, 3, 4, and 2 bits are not sufficient in the case where the terminal is connected to a plurality of serving cells each having a plurality of TRPs, it is also proposed to increase the number of bits of the C-DAI and the T-DAI, for example, to be greater than or equal to 3.

The method and the device have the advantages that when the terminal receives PDSCH data sent by a plurality of TRPs and needs to perform combined HARQ ACK/NACK feedback, the position of the HARQ feedback bit of each PDSCH is determined according to retransmission data or new data and the HARQ process number, so that the unified recognition of the terminal and a base station is realized, namely the corresponding relation between the position of the HARQ feedback bit and the PDSCH is realized, the accuracy of the HARQ feedback is improved, and the throughput is improved.

The communication device provided by the embodiment comprises: a transceiver, a memory, and a processor. Transceivers, including but not limited to transceiving antennas, may be used to interact with other devices. The memory may store computer-executable instructions; the processor is connected with the transceiver and the memory respectively, and can realize the HARQ feedback transmission method provided by any technical scheme.

Fig. 8 illustrates a terminal, which may be embodied as a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, and the like, according to an example embodiment.

Referring to fig. 8, terminal 800 may include one or more of the following components: processing component 802, memory 804, power component 806, multimedia component 808, audio component 810, input/output (I/O) interface 812, sensor component 814, and communication component 816.

The processing component 802 generally controls overall operation of the terminal 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.

The memory 804 is configured to store various types of data to support operation at the terminal 800. Examples of such data include instructions for any application or method operating on terminal 800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

Power components 806 provide power to the various components of terminal 800. Power components 806 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for terminal 800.

The multimedia component 808 includes a screen that provides an output interface between the terminal 800 and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the terminal 800 is in an operation mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the terminal 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

Sensor assembly 814 includes one or more sensors for providing various aspects of state assessment for terminal 800. For example, sensor assembly 814 can detect an open/closed state of terminal 800, the relative positioning of components, such as a display and keypad of terminal 800, sensor assembly 814 can also detect a change in position of terminal 800 or a component of terminal 800, the presence or absence of user contact with terminal 800, orientation or acceleration/deceleration of terminal 800, and a change in temperature of terminal 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

Communication component 816 is configured to facilitate communications between terminal 800 and other devices in a wired or wireless manner. The terminal 800 may access a wireless network based on a communication standard, such as Wi-Fi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, communications component 816 further includes a Near Field Communications (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the terminal 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.

In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 804 comprising instructions, executable by the processor 820 of the terminal 800 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

Fig. 9 is a schematic diagram of a base station. Referring to fig. 9, base station 900 includes a processing component 922, which further includes one or more processors and memory resources, represented by memory 932, for storing instructions, e.g., applications, that are executable by processing component 922. The application programs stored in memory 932 may include one or more modules that each correspond to a set of instructions. Further, processing component 922 is configured to execute instructions to perform the PDCCH monitoring methods illustrated in fig. 4 and/or fig. 5.

The base station 900 may also include a power supply component 926 configured to perform power management of the base station 900, a wired or wireless network interface 950 configured to connect the base station 900 to a network, and an input/output (I/O) interface 958. The base station 900 may operate based on an operating system stored in memory 932, such as Windows Server (TM), Mac OS XTM, Unix (TM), Linux (TM), Free BSDTM, or the like.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

1. A hybrid automatic repeat request (HARQ) feedback transmission method comprises the following steps:

and transmitting the HARQ feedback according to the sending sequence.

2. The method of claim 1, wherein the determining the transmission sequence of the HARQ feedback according to the data types of the PDSCH data of the plurality of physical downlink shared channels to be transmitted with the HARQ feedback comprises:

3. The method according to claim 1 or 2, wherein the determining the transmission order of the HARQ feedback according to the data type of the PDSCH data of the plurality of physical downlink shared channels to be sent for HARQ feedback further comprises:

4. The method of claim 3, wherein the determining the transmission order of the HARQ feedback according to the HARQ process number of the HARQ feedback comprises:

5. The method of claim 1, wherein the determining the transmission sequence of the HARQ feedback according to the data types of the PDSCH data of the plurality of physical downlink shared channels to be transmitted with the HARQ feedback comprises:

6. The method of claim 1, wherein the method further comprises:

7. The method of claim 6, wherein the determining the transmission order of the HARQ feedback according to the cell number of the serving cell for the plurality of PDSCH data comprises:

8. The method according to claim 1 or 2, wherein the method further comprises:

9. A hybrid automatic repeat request, HARQ, feedback transmission apparatus, comprising:

10. The apparatus of claim 9, wherein the first determining module is configured to determine that a transmission order of HARQ feedback for the retransmitted data precedes a transmission order of HARQ feedback for the newly transmitted data when the PDSCH data contains both the newly transmitted data and the retransmitted data.

11. The apparatus according to claim 9 or 10, wherein the first determining module is configured to determine the transmission order of the HARQ feedback according to HARQ process numbers of at least two PDSCH data of the same type when there are at least two PDSCH data that are both new transmission data and/or there are at least two PDSCH data that are both retransmission data.

12. The apparatus of claim 11, wherein the first determining module is configured to determine, according to the HARQ process number, that the transmission order of the HARQ feedback is ordered from small to large according to the HARQ process number.

13. The apparatus of claim 9, wherein the first determining module is configured to determine the transmission order of the HARQ feedback according to data types of a plurality of PDSCH data, for the plurality of PDSCH data transmitted by different transmission receiving points of the same serving cell at the same transmission time.

14. The apparatus of claim 9, wherein the apparatus further comprises:

15. The apparatus of claim 14, wherein the second determining module is configured to determine, according to the cell number of the serving cell, that the transmission order of the HARQ feedback is ordered from small to large according to the cell number.

16. The apparatus of claim 9 or 10, wherein the apparatus further comprises:

17. A communication device, comprising:

a transceiver;

a memory;

a processor, respectively connected to the transceiver and the memory, for controlling the transceiver to transmit and receive wireless signals by executing the computer-executable instructions stored in the memory, and implementing the HARQ feedback transmission method provided in any one of claims 1 to 8.

18. A computer storage medium having stored thereon computer-executable instructions capable, upon execution by a processor, of implementing the HARQ feedback transmission method as provided in any of claims 1 to 8.