CN110505042B - HARQ feedback method and device for uplink data - Google Patents
HARQ feedback method and device for uplink data Download PDFInfo
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- CN110505042B CN110505042B CN201910760866.5A CN201910760866A CN110505042B CN 110505042 B CN110505042 B CN 110505042B CN 201910760866 A CN201910760866 A CN 201910760866A CN 110505042 B CN110505042 B CN 110505042B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1806—Go-back-N protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
Abstract
The application discloses a method for feeding back uplink data HARQ, which is used for a mobile communication system, wherein a downlink control channel comprises second information, and the second information comprises ACK/NACK feedback information of an uplink data channel from one or more terminal devices; the second information comprises third information; the third information comprises X data segments, each data segment is used for one terminal device, and X is a positive integer. The application also provides the terminal equipment and the network equipment applying the method. In order to solve the problem of ACK/NACK feedback of a plurality of uplink HARQ processes, the invention provides a scheme for realizing the ACK/NACK information feedback of uplink data transmission of a base station for a terminal.
Description
Technical Field
The present application relates to the field of mobile communications technologies, and in particular, to a method for feeding back HARQ for uplink data, and a network device and a terminal device using the method.
Background
As the 5G new air interface (NR) first edition standard is completed, 5G will gradually expand to different domains. One important direction is the use of unlicensed bands. Compared with the licensed frequency band, the unlicensed frequency band needs to consider coexistence between different systems, typically, a Wifi system, an LTE-based LAA system, and the like. In order to make various systems coexist harmoniously, regulatory bodies of various countries adopt a forced Listen Before Transmit (LBT) technology for the use of an unlicensed frequency band, that is, data transmission can be performed only when the current channel is sensed to be unoccupied. A problem with this mechanism is that some data cannot be guaranteed to be sent at a certain location.
In the unlicensed frequency band, according to the design of the current new air interface, if the terminal needs to transmit uplink data, it needs to schedule according to the base station. The terminal needs to send a data request to the base station first, and then the base station performs corresponding resource scheduling to the terminal according to the network condition and the terminal requirement. And the terminal performs uplink data transmission according to the scheduling information of the base station by combining the channel and the self condition. In this process, the base station and the terminal need to adopt a plurality of communication processes. Due to the existence of LBT, each communication process is full of uncertainty, so that the whole uplink data transmission performance is seriously affected. In order to enhance the uplink transmission performance, it is necessary to consider shortening the entire communication flow and performing stronger protection on uplink data, for example, allocating fixed channel resources for uplink to perform data transmission. In this way, a plurality of HARQ processes can be allocated to the terminal at one time, but the downlink control information in the current 5G NR scheme only indicates whether one HARQ process is new data. There is no solution on how the network device feeds back when multiple HARQ processes are uplink.
Disclosure of Invention
The embodiment of the application provides a method and equipment for feeding back uplink data HARQ, and provides a scheme for realizing ACK/NACK information feedback of uplink data transmission of a base station for a terminal in order to solve ACK/NACK feedback of a plurality of uplink HARQ processes.
The embodiment of the application provides a method for feeding back uplink data HARQ, which is used for a mobile communication system and comprises the following steps:
the downlink control channel comprises second information, and the second information comprises ACK/NACK feedback information of an uplink data channel from one or more terminal devices;
the second information comprises third information; the third information comprises X data segments, each data segment is used for one terminal device, and X is a positive integer.
Preferably, the second information further includes fourth information; the fourth information comprises the identifiers of M terminal devices, wherein M is more than 0 and less than or equal to X.
Preferably, the second information further includes fifth information; the fifth information indicates a length of each data segment in the third information.
Further preferably, the X data segments are equal in length, and the length is preset or configured by signaling.
Further preferably, the nth data segment includes ACK/NACK feedback information for a transport block in an uplink data channel of the nth terminal. The length of the nth data segment is the HARQ process number of the uplink data of the nth terminal, wherein n is more than 1 and less than or equal to X.
Further preferably, the nth data segment includes ACK/NACK feedback information for a transmission block in an uplink data channel of the nth terminal, and also includes ACK/NACK feedback information for a coding block group. The length of the nth data segment is C times of the HARQ process number of the uplink data of the nth terminal, wherein 1< n is less than or equal to X, and C is greater than 1.
Further preferably, the second information further includes fifth information, and the fifth information indicates the length of the nth data segment in the third information corresponding to the terminal identifier in the fourth information.
In an embodiment of any one of the foregoing methods, preferably, the downlink control channel includes sixth information, where the sixth information is used to indicate whether the second information includes ACK/NACK feedback information for the coding block group.
The present application further provides a network device for feeding back HARQ for uplink data, configured to:
receiving an uplink data channel from one or more terminal devices;
sending a downlink control channel, wherein the downlink control channel comprises second information, and the second information comprises ACK/NACK feedback information of an uplink data channel from one or more terminal devices;
the second information comprises third information; the third information comprises X data segments, each data segment is used for one terminal device, and X is a positive integer.
Preferably, in the network device, the second information further includes fourth information; the fourth information comprises the identifiers of M terminal devices, wherein M is more than 0 and less than or equal to X.
Preferably, in the network device, the second information further includes fifth information; the fifth information indicates a length of each data segment in the third information.
Further preferably, in the network device, the X data segments are equal in length, and the length is preset or configured by signaling.
Further preferably, in the network device, the nth data segment includes ACK/NACK feedback information for a transmission block in an uplink data channel of the nth terminal. The length of the nth data segment is the HARQ process number of the uplink data of the nth terminal, wherein n is more than 1 and less than or equal to X.
Further preferably, in the network device, the nth data segment includes ACK/NACK feedback information for a transmission block in an uplink data channel of the nth terminal, and also includes ACK/NACK feedback information for a coding block group. The length of the nth data segment is C times of the HARQ process number of the uplink data of the nth terminal, wherein 1< n is less than or equal to X, and C is greater than 1.
Further, the second information further includes fifth information, and the fifth information indicates the length of the nth data segment in the third information corresponding to the terminal identifier in the fourth information.
In any one of the network equipment embodiments of the present application, preferably, the downlink control channel includes sixth information, where the sixth information is used to indicate whether the second information includes ACK/NACK feedback information for a coding block group.
The present application further provides a terminal device, configured to implement the method according to any of the embodiments of the present application, where the terminal device is configured to: and receiving the downlink control channel, identifying the nth data segment, wherein n is more than 1 and less than or equal to X, and if the data segment is NACK, retransmitting the uplink data channel.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:
the downlink control message provided by the invention can realize that the base station carries out ACK/NACK feedback of a plurality of HARQ processes on uplink data which is already sent by a plurality of terminals, and can also carry out information adjustment of future uplink sending on the terminals according to the condition of a channel. Therefore, the problem of low operation efficiency in the unauthorized frequency band caused by the fact that the downlink of the 5G system does not send the ACK/NACK instruction to the uplink data of the terminal can be solved, and the robustness of the 5G system in the use of the unauthorized frequency band is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a flow chart of an embodiment of the method of the present invention for a network device;
FIG. 2 is a flowchart of an embodiment of the method of the present invention applied to a terminal device;
FIG. 3 is a diagram illustrating a first message indicating only a single-terminal second message;
fig. 4 is a schematic diagram of indicating second information to multiple terminals, each terminal having the same third information length;
FIG. 5 is a diagram illustrating a second information indication for multiple terminals, where the indicated terminals have the same third information length;
fig. 6 shows that the second information indication is performed on multiple terminals, and the third information length of the indicated terminal is determined according to the HARQ process;
fig. 7 shows second information indication to a multi-terminal including fifth information;
fig. 8 is a schematic diagram of a network device and a terminal device according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Fig. 1 is a flowchart of an embodiment of the method of the present invention applied to a network device.
The embodiment of the application provides a method for feeding back uplink data HARQ, which is used for a mobile communication system and comprises the following steps:
The number of the terminal devices is X, and X is a positive integer.
In step 102, the downlink control channel includes second information, where the second information includes ACK/NACK feedback information for an uplink data channel from one or more terminal devices; here, downlink control information (first information) is defined that includes ACK/NACK feedback-related information (i.e., second information) of an uplink data channel (PUSCH) before the time of transmission of the first information.
The second information comprises third information; the third information comprises X data segments, each data segment is used for one terminal device, and X is a positive integer. Here, ACK/NACK feedback information for PUSCH data transmitted by the terminal within a period T before the first information transmission time is defined as the third information. The third information may include data block (TB) feedback information and/or Coding Block Group (CBG) feedback information. The second information may include third information corresponding to one or more terminals.
Preferably, the second information further includes fourth information; the fourth information comprises the identifiers of M terminal devices, wherein M is more than 0 and less than or equal to X. This is because, when the second information includes the third information to be transmitted to the plurality of terminals, the second information needs to indicate which terminals (identified by the fourth information) the third information corresponding to which terminals is included in the current information
The second information may include third information length indication information for a plurality of terminals. Preferably, the second information further includes fifth information; the fifth information indicates a length of each data segment in the third information. Preferably, when the second information includes the fourth information and the fifth information, the fifth information performs length indication only on the third information corresponding to the terminal device indicated by the fourth information.
Further preferably, the X data segments are equal in length, and the length is preset or configured by signaling.
Further preferably, the nth data segment includes ACK/NACK feedback information for a transport block in an uplink data channel of the nth terminal device. The length of the nth data segment is the HARQ process number of the uplink data of the nth terminal, wherein n is more than 1 and less than or equal to X. For example, when the second information corresponds to a target terminal device, the third information length is determined by the HARQ process number of the uplink data fed back by the current second information scheduled by the base station to the target terminal within the time period T.
Further preferably, the nth data segment includes ACK/NACK feedback information for a transmission block in an uplink data channel of the nth terminal, and also includes ACK/NACK feedback information for a coding block group. The length of the nth data segment is C times of the HARQ process number of the uplink data of the nth terminal, wherein 1< n is less than or equal to X, and C is greater than 1. In the third information, if the number of HARQ processes to be fed back is a bits and the length of the third information is B bits, there is a multiple point C. If B is smaller than C times a, only TB feedback information is included in the third information, and CBG feedback information is not included. Wherein A, B, C are all positive integers and a typical value for C is 3.
Further preferably, the second information further includes fifth information, and the fifth information indicates the length of the nth data segment in the third information corresponding to the terminal identifier in the fourth information.
In the embodiment of any one of the above methods, preferably, the downlink control channel (first information) includes sixth information, where the sixth information is used to indicate whether the second information includes ACK/NACK feedback information for the coding block group. That is, when the first information includes the sixth information, the sixth information directly indicates whether CBG ACK/NACK transmission is allowed in the current second information.
It should be noted that the first information is carried by the PDCCH and is one of DCI messages. The downlink control information in the current standard scheme only realizes the indication of 1 HARQ process of one terminal device, and the indication content is NDI (new information indication), not direct ACK/NACK information indication.
Step 103, the network device performs channel coding, modulation, and other operations on the information prepared in step 102, forms a PDCCH (downlink physical control channel) containing downlink control information, and transmits the PDCCH. And sending downlink control information (i.e. first information) including one or more of second information, third information, fourth information, fifth information and sixth information, as defined in step 102.
Fig. 2 is a flowchart of an embodiment of the method of the present invention applied to a terminal device.
for convenience of explanation, the terminal device that sends the uplink data channel is set as the nth terminal device of the X terminal devices.
The terminal receives a PDCCH containing downlink control information (first information) sent by the network device, where the downlink control information (first information) includes one or more of second information, third information, fourth information, fifth information, and sixth information, as described in step 102.
Step 203, preparing the PUSCH and other related uplink channel information according to the first information in the PDCCH, and if the data segment is NACK, retransmitting the uplink data channel.
Fig. 3 is a schematic diagram of indicating only the second information of a single terminal in the first information. The method comprises the step of indicating the single terminal with second information, wherein the second information occupies A bits to send TB feedback information of PUSCH data required to be fed back, and B-A bits to send CBG feedback information of the PUSCH data required to be fed back. The first information may also contain other information, such as padding bits, etc., which is not within the scope of the present invention. The first information is designed as in fig. 3 in this case, assuming that the standard gives a value of 3 for C, no CBG transmission is performed when B <3 × a. The second information now comprises only the third information content.
Taking fig. 4 to 6 as an example, when the second information includes the fourth information but does not include the fifth information, the length of the third information of each terminal may be determined in 3 ways:
mode 1: all terminals occupy a third information length with the same length, wherein the length is configured for high-level information or is preset with a relation with other parameters;
mode 2: for the terminal indicated by the fourth information, sending the third information with the same length, wherein the length is configured by the high-level information, or the relationship with other parameters is preset, and the length of the third information of the terminal not indicated is 0;
mode 3: and the length of the third information of the terminal indicated in the fourth information is determined according to the number of HARQ processes of the uplink data needing to be fed back by the third information of each terminal.
The second information includes third information and fourth information. The fourth information indicates the terminals that receive the first information, and the second information indicates the terminals (for example, all the terminals in the F terminals need not feedback the fourth and fifth information). The first information may also contain other information, such as padding bits, etc., which is not within the scope of the present invention.
Fig. 4 is a schematic diagram of indicating second information to multiple terminals, each terminal having the same third information length.
In the method 1, for example, the second information indication is performed on multiple terminals, the fifth information is not included, and all terminals occupy the third information with the same length, for example, each terminal occupies N bits of length to perform ACK/NACK feedback. The N-bit feedback allocated to each terminal is also composed of TB ACK and CBG ACK. If the number of bits feeding back the TB ACK/NACK exceeds the ratio in claim 7, CBG ACK/NACK feedback is not performed. The first information is designed in this case as shown in fig. 4.
Here, the fourth information may be invalid, and the F terminals are all fed back with the same length.
Fig. 5 shows a second information indication for multiple terminals, where the indicated terminals have the same third information length.
In the mode 2, the fourth information indicates that the terminals having the third information for transmission use the same length for transmission, and all the terminals indicated by the fourth information for transmission use the same length of the third information, for example, each terminal occupies K bits for ACK/NACK feedback. The K bits of feedback allocated to each terminal are also composed of TB ACK and CBG ACK. If the number of bits feeding back the TB ACK/NACK exceeds the ratio in claim 7, CBG ACK/NACK feedback is not performed. The first information is designed as in fig. 5 in this case. In the figure, the fourth information indicates only that the terminal 1 and the terminal 2 have information to transmit. The third information includes only feedback information of the terminal 1 and the terminal 2.
Fig. 6 shows that the second information indication is performed on multiple terminals, and the third information length of the indicated terminal is determined according to the HARQ process.
In the mode 3 and the fourth information, a terminal which sends the third information is indicated, and the length of the third information is determined according to the number of HARQ processes which need to be fed back by the third information of each terminal. The third information per terminal is also composed of TB ACK/NACK and CBG ACK/NACK. If the number of bits feeding back the TB ACK/NACK exceeds the ratio, the CBG ACK/NACK feedback is not carried out. The first information is designed as in fig. 6 in this case. The fourth information indicates only that terminal 1 and terminal 2 have information to transmit. The third information includes only feedback information of the terminal 1 and the terminal 2.
Fig. 7 shows second information indicating to a plurality of terminals including fifth information.
Performing second information indication on the multiple terminals, wherein the second information indication comprises fifth information; the fourth information indicates the terminal which sends the third information, and the fifth information directly indicates the terminal which has the third information transmission to send the ACK/NACK information length. And the third information of each terminal consists of TB ACK/NACK and CBG ACK/NACK. If the number of bits feeding back the TB ACK/NACK exceeds the ratio, the CBG ACK/NACK feedback is not carried out. The first information is designed as in fig. 7 in this case. The fourth information indicates that the terminal 1 and the terminal 2 have information to transmit, and the fifth information indicates that the terminal 1 and the terminal 2 have the third information lengths of K1 and K2, respectively. The third information feeds back ACK/NACK information of the terminal 1 and the terminal 2 according to the fifth information indication length.
Fig. 8 is a schematic diagram of a network device and a terminal device according to the present invention.
Consider a communication system comprised of network devices and terminal devices. One network device can simultaneously transmit and receive data to a plurality of terminal devices. The network device includes a network data unit and a network control unit. The terminal device includes a terminal data unit and a terminal control unit. The network data unit and the terminal data unit transmit data through a downlink data shared channel (PDSCH) and an uplink data shared channel (PUSCH). And the network control unit and the terminal control unit exchange control information through a downlink control channel (PDCCH) and an uplink control channel (PUCCH). The PDCCH transmits Downlink Control Information (DCI) and performs specific transmission format-related contents of the PDSCH, the PUSCH, and the PUCCH. And after the network data unit finishes receiving the data, the network control unit feeds back ACK/NACK information whether the data is correctly received to the terminal equipment according to the data receiving condition. Specifically, information such as ACK/NACK is carried by a PDCCH (downlink control channel). The invention provides a design of DCI, which is specifically used for carrying out ACK/NACK feedback on uplink PUSCH transmission.
The present application provides a network device 20 for feeding back HARQ of uplink data, including:
a network data unit 21, configured to receive an uplink data channel from one or more terminal devices;
a network control unit 22, configured to send a downlink control channel, where the downlink control channel includes second information, and the second information includes ACK/NACK feedback information for an uplink data channel from one or more terminal devices;
the second information comprises third information; the third information comprises X data segments, each data segment is used for one terminal device, and X is a positive integer.
Preferably, in the network device, the second information further includes fourth information; the fourth information comprises the identifiers of M terminal devices, wherein M is more than 0 and less than or equal to X.
Preferably, in the network device, the second information further includes fifth information; the fifth information indicates a length of each data segment in the third information.
Further preferably, in the network device, the X data segments are equal in length, and the length is preset or configured by signaling.
Further preferably, in the network device, the nth data segment includes ACK/NACK feedback information for a transmission block in an uplink data channel of the nth terminal. The length of the nth data segment is the HARQ process number of the uplink data of the nth terminal, wherein n is more than 1 and less than or equal to X.
Further preferably, in the network device, the nth data segment includes ACK/NACK feedback information for a transmission block in an uplink data channel of the nth terminal, and also includes ACK/NACK feedback information for a coding block group. The length of the nth data segment is C times of the HARQ process number of the uplink data of the nth terminal, wherein 1< n is less than or equal to X, and C is greater than 1.
Further, the second information further includes fifth information, and the fifth information indicates the length of the nth data segment in the third information corresponding to the terminal identifier in the fourth information.
In any one of the network equipment embodiments of the present application, preferably, the downlink control channel includes sixth information, where the sixth information is used to indicate whether the second information includes ACK/NACK feedback information for a coding block group.
The present application further proposes a terminal device 10, configured to implement the method according to any of the embodiments of the present application, where the terminal device includes: and a terminal control unit 12, configured to receive the downlink control channel and identify the first to sixth information. In particular, the nth of the data segments in the second information is identified, 1< n ≦ X. Also included is a network data unit 11 for transmitting an uplink data channel. And if the data segment is NACK, retransmitting the uplink data channel. Here, the definition of the first to sixth information, the synchronization step 102, is not described here again.
In view of the above, the present application proposes a new downlink control information format, see DCI format0_2 in table 1, and other formats are shown in standard 38.212 table 7.3.1-1.
TABLE 1 DCI Format
| DCI format | Use of |
| 0_0 | Intra-cell PUSCH scheduling |
| 0_1 | Intra-cell PUSCH scheduling |
| 0_2 | HARQ for PUSCH |
| 1_0 | Intra-cell PDSCH scheduling |
| 1_1 | Intra-cell PDSCH scheduling |
| 2_0 | Terminal group slot format notification |
| 2_1 | Terminal group PRB(s) and OFDM symbol notification |
| 2_2 | TPC command transmission PUCCH and PUSCH |
| 2_3 | TPC command set transmission for SRSC transmission of one or more terminals |
The specific definition of the DCI Format0_2 is, for example:
format0_ 2: DCI format0_2 is used to identify HARQ information of PUSCH.
Wherein the indication to the single terminal can transmit the following DCI format0_2 information in the following manner, for example, in a CRC manner scrambled by C-RNTI or CS-RNTI:
and second information: ACK/NACK indication-B bit
The indication to the multi-terminal can be realized by defining the UE-GROUP-RNTI and transmitting the following DCI format0_2 information in a CRC mode scrambled by the UE-GROUP-RNTI:
the second information includes:
terminal identity-F bit
HARQ Length indication-0 or Gbit for a given terminal
ACK/NACK indication-H bit
Particularly, the ACK/NACK length of the DCI Format0_2 is determined by the number of HARQ processes to be fed back; the length of feedback information for the Transport Block (TB) level is the same as the number of HARQ processes. The length of The Coded Block of (CBG) level feedback information length is determined by CBG configuration in uplink control information.
Wherein D, F and G are positive integers, and can be determined by a protocol or configured by a high-level specification. When the DCI format0_2 is scrambled by the C-RNTI, only one terminal is served, and the indication of the serving UE is not required. When the DCI format0_2 is scrambled by the UE-GROUP-RNTI, a plurality of terminals are served, and the ACK/NACK information of which terminals is contained in the second information needs to be indicated, so that the terminal indication with F bits needs to be performed, and the length of F is the same as the number of terminals scrambled by the UE-GROUP-RNTI.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (15)
1. A HARQ feedback method for uplink data is used in a mobile communication system, and is characterized in that,
the downlink control channel comprises second information, and the second information comprises ACK/NACK feedback information of uplink data channels from a plurality of terminal devices;
the second information comprises third information; the third information comprises X data segments, each data segment is used for a terminal device, and X is a positive integer;
the second information also comprises fourth information; the fourth information comprises identifications of M terminal devices, wherein M is more than 0 and less than or equal to X;
in the third information, the number of HARQ processes needing to be fed back is A bits, the length of the third information is B bits, multiple C exists, and if B is not smaller than C times A, the third information comprises ACK/NACK feedback information of the coding group.
2. The method of claim 1,
the second information also comprises fifth information; the fifth information indicates a length of each data segment in the third information.
3. The method of claim 1,
the X data segments are of equal length, which is either preset or configured by signaling.
4. The method of claim 1,
the nth data segment comprises ACK/NACK feedback information of a transmission block in an uplink data channel of the nth terminal;
the length of the nth data segment is the HARQ process number of the uplink data of the nth terminal, wherein n is more than 1 and less than or equal to X.
5. The method of claim 1,
the nth data segment comprises ACK/NACK feedback information of a transmission block in an uplink data channel of the nth terminal and also comprises ACK/NACK feedback information of a coding block group;
the length of the nth data segment is C times of the HARQ process number of the uplink data of the nth terminal, wherein 1< n is less than or equal to X, and C is greater than 1.
6. The method of claim 1,
the second information also comprises fifth information;
the fifth information represents the length of the nth data segment corresponding to the terminal identifier in the fourth information in the third information.
7. The method according to any one of claims 1 to 6,
the downlink control channel includes sixth information, where the sixth information is used to indicate whether the second information includes ACK/NACK feedback information for the coding block group.
8. A network device for HARQ feedback of uplink data,
receiving uplink data channels from a plurality of terminal devices;
sending a downlink control channel, wherein the downlink control channel comprises second information, and the second information comprises ACK/NACK feedback information of an uplink data channel from one or more terminal devices;
the second information comprises third information; the third information comprises X data segments, each data segment is used for a terminal device, and X is a positive integer; the second information also comprises fourth information; the fourth information comprises identifications of M terminal devices, wherein M is more than 0 and less than or equal to X;
in the third information, the number of HARQ processes needing to be fed back is A bits, the length of the third information is B bits, multiple C exists, and if B is not smaller than C times A, the third information comprises ACK/NACK feedback information of the coding group.
9. The network device of claim 8,
the second information also comprises fifth information; the fifth information indicates a length of each data segment in the third information.
10. The network device of claim 8,
the X data segments are of equal length, which is either preset or configured by signaling.
11. The network device of claim 8,
the nth data segment comprises ACK/NACK feedback information of a transmission block in an uplink data channel of the nth terminal;
the length of the nth data segment is the HARQ process number of the uplink data of the nth terminal, wherein n is more than 1 and less than or equal to X.
12. The network device of claim 8,
the nth data segment comprises ACK/NACK feedback information of a transmission block in an uplink data channel of the nth terminal and also comprises ACK/NACK feedback information of a coding block group;
the length of the nth data segment is C times of the HARQ process number of the uplink data of the nth terminal, wherein 1< n is less than or equal to X, and C is greater than 1.
13. The network device of claim 8,
the second information also comprises fifth information;
the fifth information represents the length of the nth data segment corresponding to the terminal identifier in the fourth information in the third information.
14. The network device according to any of claims 8 to 13,
the downlink control channel includes sixth information, where the sixth information is used to indicate whether the second information includes ACK/NACK feedback information for the coding block group.
15. A terminal device for use in the method of any one of claims 1 to 7,
receiving the downlink control channel, and identifying the nth data segment, wherein n is more than 1 and less than or equal to X;
and if the data segment is NACK, retransmitting the uplink data channel.
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| CN114710244B (en) * | 2022-03-14 | 2023-06-06 | 四川创智联恒科技有限公司 | Method, electronic equipment and storage medium for HARQ feedback of NR (hybrid automatic repeat request) cell |
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