CN118056367A - Method for managing allocation index of group common shared channel - Google Patents

Method for managing allocation index of group common shared channel Download PDF

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Publication number
CN118056367A
CN118056367A CN202180102873.1A CN202180102873A CN118056367A CN 118056367 A CN118056367 A CN 118056367A CN 202180102873 A CN202180102873 A CN 202180102873A CN 118056367 A CN118056367 A CN 118056367A
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Prior art keywords
shared channels
codebook
control information
feedback
harq
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郭枭龙
石靖
苟伟
郝鹏
魏兴光
刘星
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ZTE Corp
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ZTE Corp
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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
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1861—Physical mapping arrangements
    • 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]
    • 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
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1864—ARQ related signaling
    • 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
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0093—Point-to-multipoint

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A method of wireless communication, the method comprising: the communication device receiving control information indicating whether a feedback mode is enabled to provide feedback information for data received on at least part of the shared channels on the X shared channels; in response to the control information indicating that the feedback mode is enabled to provide feedback for data received on Y shared channels, the communication device transmits a codebook including feedback indicating whether the communication device received data on Y shared channels, wherein X and Y are positive integers, wherein X is greater than or equal to Y, wherein the codebook is generated based on a first set of allocation indices associated with the Y shared channels.

Description

Method for managing allocation index of group common shared channel
Technical Field
The present disclosure relates generally to digital wireless communications.
Background
Mobile communication technology is moving the world to an increasingly interconnected networked society. Next generation systems and wireless communication technologies need to support a wider range of use case features and provide more complex, advanced access requirements and flexibility than existing wireless networks.
Long term evolution (Long Term Evolution, LTE) is a mobile device and data terminal wireless communication standard established by the third generation partnership project (3rd Generation Partnership Project,3GPP). LTE-advanced (LTE ADVANCED, LTE-a) is a wireless communication standard that enhances the LTE standard. The fifth generation wireless system, referred to as 5G, advances the LTE and LTE-a wireless standards in an effort to support higher data transmission rates, large numbers of connections, ultra low latency, high reliability, and other emerging traffic demands.
Disclosure of Invention
A method of managing allocation indices (e.g., downlink allocation indices (Downlink Allocation Index, DAI)) of Group Common shared channels (e.g., group Common-Physical Downlink SHARED CHANNEL, GC-PDSCH)), generating codebooks, and/or managing control information is disclosed.
A first exemplary wireless communication method of the present disclosure includes: the communication device receiving control information indicating whether a feedback mode is enabled to provide feedback for data received on at least part of the shared channels on the X shared channels; in response to the control information indicating that the feedback mode is enabled to provide feedback for data received on Y shared channels, the communication device transmits a codebook including feedback indicating whether the communication device received data on Y shared channels, wherein X and Y are positive integers, wherein X is greater than or equal to Y, wherein the codebook is generated based on a first set of allocation indices associated with the Y shared channels.
In some embodiments, the downlink control information DCI received by the communication device includes control information indicating that the feedback mode is disabled for Z shared channels, Z being a positive integer less than X, in response to disabling the feedback mode for Z shared channels, the communication device determining to not transmit feedback of data received on the Z shared channels, the Z shared channels being associated with the second group allocation index.
In some embodiments, the radio resource control, RRC, signaling received by the communication device includes control information indicating that a feedback mode is enabled for data received on the X shared channels, the codebook being generated based on a first set of allocation indices associated with the Y shared channels and a second set of allocation indices associated with the Z shared channels.
In some embodiments, the radio resource control, RRC, signaling received by the communication device includes control information indicating that a feedback mode is enabled for data received on X shared channels, the downlink control information, DCI, received by the communication device indicating that the feedback mode is enabled, the communication device only transmitting negative acknowledgement indications for Z shared channels, Z being a positive integer less than X, the codebook being generated based on a first set of allocation indices associated with Y shared channels, the communication device generating a codebook in response to data of at least one of the Z shared channels being decoded in error, the codebook including negative acknowledgement indications for at least one allocation index associated with at least one of the Z shared channels.
In some embodiments, the method further comprises: the communication device transmitting a second codebook, the second codebook comprising feedback for data received on Z shared channels, Z being a positive integer less than X; the radio resource control, RRC, signaling received by the communication device includes control information indicating that a feedback mode is enabled for data received on the X shared channels, the downlink control information, DCI, indicating that the second codebook is a type 1 codebook, the codebook being a type 2 codebook generated based on a first set of allocation indices associated with the Y shared channels.
In some embodiments, the radio resource control, RRC, signaling received by the communication device includes control information indicating that the feedback mode is disabled for data received on the X shared channels, the communication device determining not to transmit feedback for data received on the X shared channels.
A second exemplary wireless communication method of the present disclosure includes: the network device transmitting control information indicating whether a feedback mode is enabled to provide feedback for data transmitted on at least part of the X shared channels; in response to the control information indicating that the feedback mode is enabled to provide feedback for data transmitted on Y shared channels, the network device receives a codebook, the codebook including feedback indicating whether the network device is transmitting data on Y shared channels, wherein X and Y are positive integers, wherein X is greater than or equal to Y, the codebook generated based on a first set of allocation indices associated with the Y shared channels.
In some embodiments, the downlink control information DCI transmitted by the network device includes control information indicating that the feedback mode is disabled for Z shared channels, Z being a positive integer less than X, the Z shared channels being associated with the second group allocation index.
In some embodiments, the radio resource control, RRC, signaling transmitted by the network device includes control information indicating that a feedback mode is enabled for data received on the X shared channels, the codebook being generated based on a first set of allocation indices associated with the Y shared channels and a second set of allocation indices associated with the Z shared channels.
In some embodiments, the radio resource control, RRC, signaling transmitted by the network device includes control information indicating that a feedback mode is enabled for data transmitted on X shared channels, the downlink control information, DCI, transmitted by the network device indicating that the feedback mode is enabled, the network device receiving only non-acknowledgement indications for Z shared channels, Z being a positive integer less than X, the codebook being generated based on a first set of allocation indices associated with Y shared channels, the codebook including a negative acknowledgement indication for at least one allocation index associated with at least one of the Z shared channels to indicate that data of the at least one shared channel is erroneously decoded by the communication device.
In some embodiments, the method further comprises the network device receiving a second codebook, the second codebook comprising feedback for data received on Z shared channels, Z being a positive integer less than X, the radio resource control, RRC, signaling transmitted by the network device comprising control information indicating that a feedback mode is enabled for data transmitted on X shared channels, the downlink control information, DCI, indicating that the second codebook is a type 1 codebook, the codebook being a type 2 codebook generated based on a first set of allocation indices associated with Y shared channels.
In some embodiments, the radio resource control, RRC, signaling transmitted by the network device includes control information indicating that the feedback mode is disabled for data received on the X shared channels, the codebook received by the network device not including feedback for data received on the X shared channels.
In some embodiments, one or more of the first or second set of allocation indices comprises one or more downlink allocation indices DAI, and the X shared channels comprise a group common physical downlink shared channel GC-PDSCH.
A third exemplary wireless communication method of the present disclosure includes: the network device transmitting first control information to the first group of communication devices, the first control information indicating whether the first group of communication devices enables a feedback mode to transmit feedback for data received on the plurality of shared channels; the network device transmits second control information to the second group of communication devices, the second control information indicating that the second group of communication devices are prohibited from enabling the feedback mode to transmit feedback for data received on the plurality of shared channels.
A fourth exemplary wireless communication method of the present disclosure includes: the network device transmitting first control information to the first group of communication devices, the first control information indicating whether the first group of communication devices enables a feedback mode to transmit feedback for data received on the plurality of shared channels; the network device transmits second control information to the second group of communication devices, the second control information indicating that the second group of communication devices are capable of enabling a feedback mode to transmit feedback for data received on the plurality of shared channels.
In some embodiments, the plurality of shared channels includes a plurality of group common physical downlink shared channels GC-PDSCH.
In another exemplary embodiment, the above-described method is embodied in the form of processor-executable code and stored in a non-transitory computer-readable storage medium. The code embodied in the computer readable storage medium, when executed by a processor, causes the processor to implement the methods described in this patent document.
In another exemplary embodiment, an apparatus configured or operable to perform the above method is disclosed.
The above and other aspects and implementations thereof will be described in more detail in the accompanying drawings, description and claims.
Drawings
Fig. 1 shows a scenario where multiple user equipments UE with different HARQ-ACK enable/disable configurations have downlink allocation index DAI mismatch.
Fig. 2 illustrates an exemplary scenario in which the individual DAI counting or the individual DAI determination is performed according to the HARQ-ACK enable indication field.
Fig. 3 shows an exemplary scenario for solving DAI mismatch by switching feedback modes.
Fig. 4 illustrates an exemplary scenario for resolving DAI mismatch by switching codebook types.
Fig. 5 shows an exemplary scenario where only RRC-HARQ disabled and DCI-HARQ enabled UEs are present.
Fig. 6 shows an exemplary scenario in which HARQ-ACK enablement/disablement is configured using each G-RNTI.
Fig. 7 illustrates an exemplary block diagram of a hardware platform, which may be part of a network device or a communication device.
Fig. 8 illustrates an example of wireless communication including a base station BS and a user equipment UE, based on some implementations of the disclosed technology.
Fig. 9 shows an exemplary flow chart for transmitting a codebook.
Fig. 10 illustrates an exemplary flow chart for receiving a codebook.
Fig. 11 to 12 show exemplary flowcharts for transmitting control information.
Detailed Description
Hybrid automatic repeat request Acknowledgement (Hybrid Automatic Repeat request Acknowledge, HARQ-ACK) feedback based on Acknowledgement (ACK) or negative Acknowledgement (Negative Acknowledgement, NACK) for one service, type 1 codebook is constructed from the K1 set, type 2 codebook is constructed from the downlink allocation index (Downlink Assignment Index, DAI) field, including Counter-DAI (C-DAI) and Total-DAI (T-DAI). In constructing the type 2 codebook, if the DAI field value in the received downlink control information (Downlink Control Information, DCI) is discontinuous, the UE may experience a loss of the downlink control information DCI.
A multimedia broadcast/multicast service (Multimedia Broadcast/Multicast Service, MBS) is scheduled by a group common DCI, all UEs within the group receive the same group common DCI (GC-DCI) and a group common DCI physical downlink shared channel (GC-PDSCH) to be scheduled. Each Multicast Broadcast Service (MBS) service corresponds to a multicast radio network temporary identifier (Group Radio Network Temporary Identifier, G-RNTI), and the DAI count in the GC-DCI is per G-RNTI. That is, for each G-RNTI, the GC-DCI represents the same DAI value for a group of UEs associated with the G-RNTI, where the GC-DAI may be incremented by the DAI value of a subsequent PDSCH transmission relative to the DAI value of a previous PDSCH transmission. For the current HARQ-ACK feedback mechanism of MBS services, ACK/NACK-based and NACK-only based feedback is supported, and the generation of type 1 and type 2 codebooks is essentially the same as that described for unicast.
HARQ-ACK enablement/disablement is configured by radio resource control (Radio Resource Control, RRC) and DCI. If the RRC configures the UE to enable HARQ-ACK feedback, the UE ignores the HARQ-ACK enable/disable indication and always provides HARQ-ACK feedback. If the RRC configures the UE to disable HARQ-ACK feedback, the UE does not always provide HARQ-ACK feedback. If the RRC configures the UE to enable or disable HARQ-ACK according to the HARQ-ACK enable field value in the DCI, the UE provides HARQ-ACK information of the corresponding GC-PDSCH when the field value is configured to indicate that HARQ-ACK information is enabled (e.g., using bit value "1"); when the field value is configured to indicate that HARQ-ACK information is disabled (e.g., using bit value "0"), the UE does not provide HARQ-ACK. According to the above configuration, UEs in a group may be classified into 3 categories, named RRC-HARQ-enabled, RRC-HARQ-disabled, and DCI-HARQ-enabled, respectively, in the embodiments of the present disclosure.
Fig. 1 shows a scenario where multiple UEs with different HARQ-ACK enable/disable configurations have DAI mismatch. For GC-DCI scheduling PDSCH of one service in a single carrier, UEs with different HARQ-ACK enabled configurations will face the problem in fig. 1. As shown in the exemplary scenario of fig. 1, UE 1 is DCI-HARQ-enabled, wherein UE 1 is instructed to provide HARQ-ACK information for PDSCH #1 and # 3; UE 2 is RRC-HARQ-enabled, requiring HARQ-ACK information of all PDSCH; UE 3 is RRC-HARQ-disabled, does not need feedback and ignores the field value corresponding to HARQ-ACK. In constructing the type 2 codebook from the DAI values in the GC-DCI, UE 2 needs to set the DAI values to 1,2, 3, while UE 1 needs to set the DAI value of GC-pdsch#3 to 2, without setting the DAI value for GC-pdsch#2. However, since all three UEs receive the same GC-DCI, the DAI value of UE 2 cannot be set to 1,2, 3, and the DAI value of UE 1 is set to 1, 2.
If the DAI value is set according to the requirements of UE 2, UE1 may reduce the DAI value of GC-pdsch#3 by 1 when constructing the type 2 codebook, but when UE1 lacks the DCI value of GC-pdsch#2, UE1 will consider it as a normal DCI absence situation, and thus will provide NACK feedback for GC-pdsch#2. To save the HARQ-ACK information bits, a HARQ-ACK enable/disable configuration is introduced, which conflicts with this behavior. Some approach is needed to solve the DAI mismatch problem.
The following examples of headings are provided to facilitate an understanding of embodiments of the disclosure and are not intended to limit the scope of the embodiments of the disclosure in any way. Thus, one or more features of one exemplary embodiment may be combined with one or more features of another exemplary embodiment. In addition, the present application uses 5G terminology for clarity of explanation, but the techniques disclosed herein are not limited to 5G techniques and may be used in wireless systems implementing other protocols.
I. example 1
In this embodiment, the base station performs a separate DAI count using one DAI field in the GC-DCI according to the HARQ-ACK-enabled field value in the GC-DCI, wherein the DAI count is performed for the DCI-HARQ enabled PDSCH for the DCI for which the field indicates enabled and the DAI count is performed for the DCI-HARQ disabled PDSCH for the DCI for which the field indicates disabled. Different classes of UEs may generate different type 2 codebooks according to HARQ-ACK enabled/disabled configurations.
Fig. 2 illustrates an exemplary scenario in which the individual DAI counting or the individual DAI determination is performed according to the HARQ-ACK enable indication field. In fig. 2, GC-DCI schedules PDSCH served by one MBS in one carrier, HARQ-ACK-enabled and HARQ-ACK-disabled are used to indicate HARQ-ACK-enabled field indication enabled and disabled, respectively. For HARQ-enabled DCI, DAI counts will be made for PDSCH 1,3 and 4. For HARQ disabled DCI, DAI counts are performed for PDSCH 2 and 5. The DAI fields of all DCIs are the same, and the UE can distinguish the DCI counting order according to the HARQ-ACK-enable field value.
UE 1 is DCI-HARQ-enabled, where the enablement/disablement of HARQ-ACK feedback dynamically changes with DCI changes. Thus, UE 1 does not provide HARQ-ACK information for PDSCH scheduled by HARQ-disabled DCI, but generates a type 2 codebook from only DAI counts in HARQ-enabled DCI. The HARQ-ACK information is { HARQ-PDSCH1, HARQ-PDSCH3, HARQ-PDSCH4}.
UE 2 is RRC-HARQ-enabled, and thus, although the same GC-DCI as UE 1 is received, UE 2 does not respond to the HARQ-ACK enable indication, but provides HARQ-ACK information for all PDSCH. The UE 2 constructs a type 2 codebook according to the two DAI counting sequences, respectively, and concatenates the two parts into one codebook. The concatenation rules may be: (1) The codebook of DCI-disabled PDSCH is concatenated after the codebook of DCI-enabled PDSCH, where in the example of fig. 2, HARQ-ACK information is { HARQ-PDSCH1, HARQ-PDSCH3, HARQ-PDSCH4, HARQ-PDSCH2, HARQ-PDSCH5}; (2) The concatenation order is determined by the first DCI, e.g., if the first DCI is HARQ-ACK-disabled, the DCI-disabled codebook is placed before or before the DCI-enabled PDSCH (e.g., HARQ information is { HARQ-PDSCH2, HARQ-PDSCH5, HARQ-PDSCH1, HARQ-PDSCH3, HARQ-PDSCH4 }).
UE 3 is RRC-HARQ-disabled and does not provide HARQ-ACK feedback whether or not GC-DCI indicates HARQ-ACK-enabled. The DAI count has no effect on UE 3.
Regardless of how the HARQ-ACK-enabled field indicates, the fields related to HARQ-ACK feedback in the GC-DCI, (e.g., PRI (PUCCH resource indicator)) and K1 are set to the same value as when HARQ-ACK feedback is required for the corresponding PDSCH.
UE1 determines PUCCH resources from PRI in the last DCI of HARQ-ACK-enablement and UE2 determines PUCCH resources from PRI in the last DCI of all DCIs. In fig. 1, although the C-DAI and T-DAI are shown as the same value, in some embodiments related to carrier aggregation, the C-DAI and T-DAI may be different.
EXAMPLE 2
The present embodiment solves the DAI mismatch problem described above by dynamically changing the HARQ-ACK feedback mode. For GC-PDSCH with DAI mismatch problem, the feedback mode may be changed by DCI indication so that the DCI indicates that one or more GC-PDSCH change the feedback mode from ACK/NACK based feedback (type 2 codebook) to NACK only mode.
Dynamic switching of HARQ-ACK feedback may be achieved through field values in DCI, e.g., specific values of K1 and PRI. The GC-DCI incorporates a HARQ-ACK-enable field that may be used to indicate feedback mode switching.
Fig. 3 shows an example scenario for solving DAI mismatch by switching feedback modes. In fig. 3, GC-DCI schedules PDSCH of one MBS service in one carrier, HARQ-ACK-enable and HARQ-ACK-disable are used to represent enable and disable of HARQ-ACK-enable fields, respectively. For HARQ-enabled DCI, DAI counts will be made for PDSCH 1, 3 and 4. For HARQ-disabled PDSCH, the feedback mode indication switches to NACK only, the DAI is not included in the corresponding DCI. DAI counting is performed on HARQ-ACK enabled PDSCH.
UE 1 is DCI-HARQ-enabled, and the enabling/disabling of HARQ-ACK feedback varies dynamically with DCI. UE 1 does not provide HARQ-ACK information for PDSCH scheduled by HARQ-disabled DCI, but generates a type 2 codebook from only DAI counts in HARQ-enabled DCI. The HARQ-ACK information is { HARQ-PDSCH1, HARQ-PDSCH3, HARQ-PDSCH4}.
UE 2 is RRC-HARQ-enabled, and although the same GC-DCI as UE 1 is received, UE 2 does not respond to the HARQ-ACK enable indication, but provides HARQ-ACK information for all PDSCH. UE 2 builds a type 2 codebook according to the same DAI counting order as UE 1. For PDSCH indicating HARQ-ACK-disable, UE 2 provides NACK-only feedback, indicating that UE 2 is not decoding PDSCH correctly. The class 2 codebook and the NACK feedback only are indicated in one slot, and they are separately transmitted in each PUCCH in case of non-overlapping, and in case of overlapping, the NACK feedback only can be multiplexed with the class 2 codebook by converting to ACK/NACK bits.
UE 3 is RRC-HARQ-disabled and does not provide HARQ-ACK feedback whether or not GC-DCI indicates HARQ-ACK-enabled. The DAI count and feedback mode switching have no impact on UE 3.
For UEs supporting NACK only and ACK/NACK feedback, both PUCCH resources are configured. UE 1 and UE 2 determine PUCCH resources carrying a class 2 codebook according to PRI of the last DCI in the HARQ-ACK-enabled DCI. UE 2 determines NACK-only PUCCH resources from PRI in the corresponding DCI for HARQ-ACK-disabling.
EXAMPLE 3
The present embodiment solves the DAI mismatch problem described above by dynamically changing the reference codebook type. The codebook type may be changed by a DCI indication that changes the codebook type of PDSCH from type 2 to type 1 for GC-PDSCH having DAI mismatch problem.
Dynamic switching of codebook types may be achieved through field values in DCI, e.g., specific values of K1 and PRI. A HARQ-ACK enabled field is introduced in the GC-DCI to indicate codebook type switching.
Fig. 4 shows an example scenario for solving DAI mismatch by switching codebook types. In fig. 4, GC-DCI schedules PDSCH served by one MBS in one carrier, and HARQ-ACK-enabled and HARQ-ACK-disabled indicate HARQ-ACK-enabled field values of 0 and 1, respectively. For HARQ-enabled DCI, PDSCH 1, 3 and 4 will be DAI counted. For HARQ-disabled PDSCH (i.e., PDSCH 2 and 5), the indicated codebook type is switched to type 1, and DAI is not included in the corresponding DCI. DAI counting is performed on HARQ-ACK enabled PDSCH.
UE 1 is DCI-HARQ-enabled, the enabling/disabling of HARQ-ACK feedback varies dynamically with DCI, UE 1 does not provide HARQ-ACK information for PDSCH scheduled by the HARQ-disabled DCI, but generates a type 2 codebook from DAI counts in the HARQ-enabled DCI only. The HARQ-ACK information is { HARQ-PDSCH1, HARQ-PDSCH3, HARQ-PDSCH4}.
UE 2 is RRC-HARQ-enabled, and although the same GC-DCI as UE 1 is received, UE 2 does not respond to the HARQ-ACK enable indication, but provides HARQ-ACK information for all PDSCH. UE 2 builds a type 2 codebook according to the same DAI counting order as UE 1. For PDSCH indicating HARQ-ACK-disable, UE 2 provides a type 1 codebook. Indicating the two codebooks in one time slot, whether overlapped or not, multiplexing the 1-type codebook and the 2-type codebook, wherein the multiplexing rule can be that (1) the 1-type codebook of DCI-forbidden PDSCH is connected in series with the 2-type codebook of DCI-enabled PDSCH, and the HARQ-ACK information is { HARQ-PDSCH1, HARQ-PDSCH3, HARQ-PDSCH4, HARQ-PDSCH2, HARQ-PDSCH5}; (2) The concatenation order is determined by the first DCI, e.g. if the first DCI is HARQ-ACK-disabled, the DCI-disabled type 1 codebook is put in front.
UE 3 is RRC-HARQ-disabled and does not provide HARQ-ACK feedback whether or not GC-DCI indicates HARQ-ACK-enabled. The DAI count and codebook type switching have no impact on UE 3.
UE 1 and UE 2 determine PUCCH resources carrying a class 2 codebook according to PRI of the last DCI in the HARQ-ACK-enabled DCI. UE 2 determines PUCCH resources carrying a class 1 codebook from the PRI in the corresponding DCI for HARQ-ACK-disabling.
IV. example 4
The embodiment avoids the problem of mismatch of DCI by configuring HARQ-ACK enabling/disabling according to different UE types in the group. Since the RRC-HARQ disabled UE is not affected by the DCI HARQ-ACK enabled indication, this embodiment will include two cases.
Fig. 5 shows an exemplary scenario where only RRC-HARQ-disabled and DCI-HARQ-enabled UEs are present. In fig. 5, only RRC-HARQ-disabled and DCI-HARQ-enabled UEs are present in the group receiving MBS service, only DCI-HARQ-enabled UEs respond to the HARQ-ACK-enabled indication field in the DCI without restricting the HARQ-ACK enable/disable configuration. For HARQ-enabled DCI, PDSCH 1,3 and 4 are to be DAI counted. The DAI field is not included in the HARQ-disabled DCI.
UE 1 is DCI-HARQ-enabled, the enabling/disabling of HARQ-ACK feedback varies dynamically with DCI, UE 1 does not provide HARQ-ACK information for those PDSCH scheduled by the HARQ-disabled DCI, but generates a type 2 codebook from only DAI counts in the HARQ-enabled DCI. The HARQ-ACK information is { HARQ-PDSCH1, HARQ-PDSCH3, HARQ-PDSCH4}.
UE 2 is RRC-HARQ-disabled and does not provide HARQ-ACK feedback whether or not GC-DCI indicates HARQ-ACK-enabled.
All UEs within the group will not provide HARQ-ACK information for GC-PDSCH 2. PRI and K1 may not be configured as HARQ-ACK-disabled DCI. For example, the HARQ-ACK enable/disable configuration in GC-DCI is per PDSCH.
When there are UEs belonging to each category in a group receiving MBS service, the HARQ-ACK-enable field indicates enable or disable in GC-DCI. For the field indicating HARQ-ACK-enabled, UEs other than RRC-HARQ-disabled class will provide HARQ-ACK information for all PDSCH, while for the field indicating HARQ-ACK-disabled, only RRC-HARQ-enabled UEs will provide HARQ-ACK information. The DAI field is included in all DCIs, and DAI counting is performed on all PDSCH served regardless of how the HARQ-ACK-enabled field indicates.
In fig. 6, UE 1 is DCI-HARQ-enabled, UE 2 is RRC-HARQ-enabled, HARQ-ACK feedback enabled is always set to enabled, they generate a type 2 codebook from DAI counts in all DCIs. The HARQ-ACK information is { HARQ-PDSCH1, HARQ-PDSCH2, HARQ-PDSCH3, HARQ-PDSCH4}.
UE 3 is RRC-HARQ-disabled, never providing HARQ-ACK feedback.
If the HARQ-ACK feedback enable is always set to disable, UE 1 and UE 3 may not provide HARQ-ACK information for all PDSCH. Only UE 2 generates a type 2 codebook from the DAI count and transmits in the PUCCH indicated by the PRI in the last DCI.
PRI and K1 are configured in all DCIs regardless of whether the HARQ-ACK enable field is set to "enable" or "disable". It can be said that HARQ-ACK enablement/disablement in GC-DCI is configured per G-RNTI or MBS service.
V. example 5
Only NACK feedback is used to save PUCCH resources for the group common PDSCH, and for one GC-PDSCH, an incorrectly decoded UE will transmit the corresponding PUCCH, while a correctly decoded UE will not. When any UE transmits a NACK-only PUCCH, the base station schedules retransmission.
For unicast, the DAI field in the uplink scheduling DCI indicates the number of HARQ-ACK information bits (dynamic codebook) or HARQ-ACK information transmitted in a slot (semi-static codebook). When the HARQ-ACK codebook overlaps the PUSCH, the UL DAI value contained in the DCI may help the UE to implement the DCI loss problem and generate a reliable codebook.
When multiple NACK-only PUCCHs are indicated in the same slot, a multiplexing method may be employed regardless of whether they overlap. Converting to an ACK/NACK-based HARQ-ACK feedback and defining a NACK-only combination corresponding to PUCCH transmission are two reliable methods.
When a plurality of NACK-only PUCCHs overlap with PUSCH in a slot, it may be converted into ACK/NACK bits and multiplexed with PUSCH. For example, it is necessary that the UE correctly decodes the first PDSCH without transmitting the PUCCH based on feedback of 2 PDSCHs of NACK only, and the UE incorrectly decodes the second PDSCH and transmits the PUCCH, when only one PUCCH is actually overlapped with the PUSCH, the UE converts NACK only into ACK/NACK bits by setting bit value 1 of the first PDSCH and bit value 0 of the second PDSCH.
When the DCI schedule of the first PDSCH is absent, the UE converts only NACK bits of the second PDSCH into ACK/NACK bits, for example, only 1 bit and the bit value is 1. The base station cannot know which PDSCH was missed and to which PDSCH the HARQ-ACK bit belongs. The DAI value of the Uplink (UL) may be used here to make the UE recognize this problem.
In this embodiment, the DAI field is configured separately in the uplink scheduling DCI, and is used to indicate HARQ-ACK information that is NACK only when multiplexing with PUSCH. Since the gNB cannot know the number of NACK only that each UE actually multiplexes, the UL DAI is set to the number of PDSCH received by the UE.
In the converted ACK/NACK bits, bit positions of each NACK only or each PDSCH are determined by each G-RNTI, and an ascending order or a descending order may be adopted. For correctly decoded PDSCH, for example, the corresponding NACK-only resource is not transmitted, HARQ-ACK bit is set to 1, PDSCH with NACK feedback is set to 0.
When the DCI schedules UL DAI of NACK only in PUSCH, the UE may implement a case of discontinuous transmission (Discontinuous Transmission, DTX) by determining whether the DAI value is equal to the number of received PDSCH, and sets a NACK value for DTX PDSCH. For example, NACK-only feedback of 3 PDSCH is to be multiplexed with PUSCH, the first PDSCH is ACK, the second PDSCH is DTX, the third PDSCH is NACK, the DAI value in DCI is 3, and UE receives only 2 PDSCH, so one NACK value will be added in the transition bit. The converted HARQ-ACK bit will be 1, 0.
Fig. 7 illustrates an exemplary block diagram of a hardware platform 700, which may be part of a network device (e.g., a base station) or a communication device (e.g., a User Equipment (UE)). Hardware platform 700 includes at least one processor 710 and a memory 705 storing instructions. The instructions executed by processor 710 use hardware platform 500 to perform the operations in the various embodiments described in figures 1-6 and 8-12 and this patent document. The transmitter 715 transmits or sends information or data to another device. For example, the network device transmitter may transmit information to the user device. The receiver 720 receives information or data transmitted or sent by another device. For example, the user device may receive information from the network device.
The implementation of the embodiments described above will be applicable to wireless communications. Fig. 8 shows one example of a wireless communication system (e.g., a 5G or NR cellular network) that includes a base station 820 and one or more User Equipment (UEs) 811, 812, and 813. In some embodiments, the UE accesses a mobile communication Base Station (BS) (e.g., network) using a communication link to the network (or referred to as an uplink direction, as indicated by dashed arrows 831, 832, 833), and then enables subsequent communications from the BS to the UE (e.g., a direction from the network to the UE, sometimes referred to as a downlink direction, as indicated by arrows 841, 842, 843). In some embodiments, the BS transmits information (sometimes referred to as a downlink direction, as indicated by arrows 841, 842, 843) to the UE, and then enables subsequent communications from the UE to the BS (e.g., shown in the direction from the UE to the BS, sometimes referred to as an uplink direction, as indicated by dashed arrows 831, 832, 833). The UE may be a smart phone, tablet, mobile computer, machine-to-Machine (M2M) device, internet of things (Internet of Things, ioT) device, or the like.
Fig. 9 shows an exemplary flow chart for transmitting a codebook. Step 902 includes the communication device receiving control information indicating whether a feedback mode is enabled for providing feedback for data received on at least a portion of the X shared channels. Step 904 includes, in response to the control information indicating that the feedback mode is enabled to provide feedback for data received on Y shared channels, transmitting a codebook by the communication device, the codebook including feedback indicating whether the communication device received data on Y shared channels, wherein X and Y are positive integers, wherein X is greater than or equal to Y, wherein the codebook is generated based on a first set of allocation indices associated with the Y shared channels.
In some embodiments, the downlink control information DCI received by the communication device includes control information indicating that the feedback mode is disabled for Z shared channels, Z being a positive integer less than X, the communication device determining to not transmit feedback information for data received on the Z shared channels in response to the indication that the feedback mode is disabled for the Z shared channels, the Z shared channels being associated with the second group allocation index.
In some embodiments, the radio resource control, RRC, signaling received by the communication device includes control information indicating that a feedback mode is enabled for data received on the X shared channels, the codebook being generated based on a first set of allocation indices associated with the Y shared channels and a second set of allocation indices associated with the Z shared channels.
In some embodiments, the radio resource control, RRC, signaling received by the communication device includes control information indicating that a feedback mode is enabled for data received on X shared channels, the downlink control information, DCI, received by the communication device indicating that the feedback mode is enabled, the communication device only transmitting negative acknowledgement indications for Z shared channels, Z being a positive integer less than X, the codebook being generated based on a first set of allocation indices associated with Y shared channels, the communication device generating a codebook in response to data of at least one of the Z shared channels being decoded in error, the codebook including negative acknowledgement indications for at least one allocation index associated with at least one of the Z shared channels.
In some embodiments, the method further comprises: the communication device transmitting a second codebook, the second codebook comprising feedback for data received on Z shared channels, Z being a positive integer less than X; the radio resource control, RRC, signaling received by the communication device includes control information indicating that a feedback mode is enabled for data received on the X shared channels, the downlink control information, DCI, indicating that the second codebook is a type 1 codebook, the codebook being a type 2 codebook generated based on a first set of allocation indices associated with the Y shared channels.
In some embodiments, the radio resource control, RRC, signaling received by the communication device includes control information indicating that the feedback mode is disabled for data received on the X shared channels, the communication device determining not to transmit feedback for data received on the X shared channels.
Fig. 10 illustrates an exemplary flow chart for receiving a codebook. Step 1002 includes the network device transmitting control information indicating whether a feedback mode is enabled to provide feedback for data transmitted on at least a portion of the X shared channels; step 1004 includes enabling a feedback mode to provide feedback for data transmitted on Y shared channels in response to the control information indication, the network device receiving a codebook, the codebook including feedback for indicating whether the network device is transmitting data on Y shared channels, wherein X and Y are positive integers, wherein X is greater than or equal to Y, the codebook generated based on a first set of allocation indices associated with the Y shared channels.
In some embodiments, the downlink control information DCI transmitted by the network device includes control information indicating that the feedback mode is disabled for Z shared channels, Z being a positive integer less than X, the Z shared channels being associated with the second group allocation index.
In some embodiments, the radio resource control, RRC, signaling transmitted by the network device includes control information indicating that a feedback mode is enabled for data received on the X shared channels, the codebook being generated based on a first set of allocation indices associated with the Y shared channels and a second set of allocation indices associated with the Z shared channels.
In some embodiments, the radio resource control, RRC, signaling transmitted by the network device includes control information indicating that a feedback mode is enabled for data transmitted on X shared channels, the downlink control information, DCI, transmitted by the network device indicating that the feedback mode is enabled, the network device receiving only negative acknowledgement indications for Z shared channels, Z being a positive integer less than X, the codebook being generated based on a first set of allocation indices associated with Y shared channels, the codebook including negative acknowledgement indications for at least one allocation index associated with at least one of the Z shared channels to indicate that data of the at least one shared channel is erroneously decoded by the communication device.
In some embodiments, the method further includes the network device receiving a second codebook, the second codebook including feedback for data received on Z shared channels, Z being a positive integer less than X, the radio resource control, RRC, signaling transmitted by the network device including control information indicating that a feedback mode is enabled for data received on X shared channels, the Downlink Control Information (DCI) indicating that the second codebook is a type 1 codebook, the codebook being a type 2 codebook generated based on a first set of allocation indices associated with Y shared channels.
In some embodiments, the radio resource control, RRC, signaling transmitted by the network device includes control information indicating that the feedback mode is disabled for data received on the X shared channels, the codebook received by the network device not including feedback for data received on the X shared channels.
In some embodiments, one or more of the first or second set of allocation indices comprises one or more downlink allocation indices DAI, and the X shared channels comprise a group common physical downlink shared channel GC-PDSCH.
Fig. 11 shows an exemplary flow chart for transmitting control information. Step 1102 includes the network device transmitting first control information to a first group of communication devices, the first control information indicating whether the first group of communication devices enables a feedback mode to transmit feedback for data received on a plurality of shared channels. Step 1104 includes the network device transmitting second control information to the second group of communication devices, the second control information indicating disabling the second group of communication devices from enabling the feedback mode to transmit feedback for data received on the plurality of shared channels.
Fig. 12 shows an exemplary flow chart for transmitting control information. Step 1202 includes the network device transmitting first control information to a first group of communication devices, the first control information indicating whether the first group of communication devices enables a feedback mode to transmit feedback for data received on a plurality of shared channels. Step 1204 the network device transmits second control information to the second group of communication devices, the second control information indicating that the second group of communication devices is capable of enabling a feedback mode to transmit feedback for data received on the plurality of shared channels.
In some embodiments, the plurality of shared channels includes a plurality of group common physical downlink shared channels GC-PDSCH.
In embodiments of the present application, the term "exemplary" is used to refer to "… … examples" and does not mean an ideal or preferred embodiment unless otherwise specified.
Some embodiments described herein are described in the general context of methods or processes, which may be implemented in one embodiment by a computer program product embodied in a computer-readable medium, including computer-executable instructions, such as program code, executed by computers in network environments. Computer readable media can include removable and non-removable storage devices including, but not limited to, read Only Memory (ROM), random Access Memory (RAM), compact Discs (CD), digital Versatile Discs (DVD), and the like. Thus, the computer readable medium may include a non-transitory storage medium. Generally, program modules may include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. Computer-or processor-executable instructions, associated data structures, and program modules represent examples of program code for executing steps of the methods disclosed herein. The particular sequence of such executable instructions or associated data structures represents examples of corresponding acts for implementing the functions described in such steps or processes.
Some disclosed embodiments may be implemented as a device or module using hardware circuitry, software, or a combination thereof. For example, a hardware circuit implementation may include discrete analog and/or digital components that are integrated, for example, as part of a printed circuit board. For example, the disclosed components or modules may be implemented as Application Specific Integrated Circuits (ASICs) and/or Field Programmable Gate Array (FPGA) devices. Some embodiments may additionally or alternatively include a Digital Signal Processor (DSP) that is a special purpose microprocessor having an architecture optimized for the operational requirements of the digital signal processing associated with the functions of the present disclosure. Similarly, the various components or sub-components within each module may be implemented in software, hardware, or firmware. The modules and/or connections between components within the modules may be provided using any connection method and medium known in the art, including but not limited to communication over the internet, wired or wireless networks using an appropriate protocol.
While this application contains many implementation details, these should not be construed as limitations on the scope of what may be claimed or of what may be claimed, but rather as descriptions of features specific to particular embodiments. Certain features of the application that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination. Furthermore, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination. Similarly, although operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results.
The above embodiments have described only a few implementations and examples, and other implementations, enhancements, and variations may be made based on what is described and illustrated in the present disclosure.

Claims (18)

1. A method of wireless communication, comprising:
The communication device receiving control information indicating whether a feedback mode is enabled to provide feedback for data received on at least a portion of the X shared channels;
in response to the control information indicating that the feedback mode is enabled to provide feedback for data received on Y shared channels, the communication device transmits a codebook including feedback indicating whether the communication device received data on the Y shared channels,
Wherein X and Y are positive integers,
Wherein X is greater than or equal to Y,
Wherein the codebook is generated based on a first set of allocation indices associated with the Y shared channels.
2. The method according to claim 1,
Wherein the downlink control information, DCI, received by the communication device includes the control information, the control information indicating disabling of the feedback mode for Z shared channels,
Wherein Z is a positive integer less than X,
Wherein, in response to disabling the feedback mode for the Z shared channels, the communication device determines not to transmit feedback of data received on the Z shared channels,
Wherein the Z shared channels are associated with a second group allocation index.
3. The method according to claim 2,
Wherein radio resource control, RRC, signaling received by the communication device includes the control information indicating that the feedback mode is enabled for data received on the X shared channels,
Wherein the codebook is generated based on the first set of allocation indices associated with the Y shared channels and the second set of allocation indices associated with the Z shared channels.
4. The method according to claim 1,
Wherein radio resource control, RRC, signaling received by the communication device includes the control information indicating that the feedback mode is enabled for data received on the X shared channels,
Wherein the downlink control information DCI received by the communication device indicates that the feedback mode is enabled, and only negative acknowledgement indications for Z shared channels are sent, wherein Z is a positive integer smaller than X,
Wherein the codebook is generated based on the first set of allocation indices associated with the Y shared channels,
Wherein in response to data of at least one of the Z shared channels being decoded in error, the communication device generates the codebook including the negative acknowledgement indication for at least one allocation index associated with the at least one of the Z shared channels.
5. The method of claim 1, further comprising:
the communication device transmits a second codebook, the second codebook including feedback for data received on Z shared channels,
Wherein Z is a positive integer less than X,
Wherein radio resource control, RRC, signaling received by the communication device includes the control information indicating that the feedback mode is enabled for data received on the X shared channels,
Wherein downlink control information, DCI, indicates that the second codebook is a type 1 codebook,
Wherein the codebook is a type 2 codebook generated based on the first set of allocation indices associated with the Y shared channels.
6. The method according to claim 1,
Wherein the radio resource control, RRC, signaling received by the communication device includes control information indicating that the feedback mode is disabled for data received on the X shared channels,
Wherein the communication device determines not to transmit feedback for the data received by the X shared channels.
7. A method of wireless communication, comprising:
The network device transmitting control information indicating whether a feedback mode is enabled to provide feedback for data transmitted on at least part of the X shared channels;
Responsive to the control information indicating that the feedback mode is enabled to provide feedback for data transmitted on Y shared channels, the network device receives a codebook, the codebook including feedback for indicating whether the network device is transmitting data on the Y shared channels,
Wherein X and Y are positive integers,
Wherein X is greater than or equal to Y,
Wherein the codebook is generated based on a first set of allocation indices associated with the Y shared channels.
8. The method according to claim 7,
Wherein the downlink control information DCI transmitted by the network device comprises the control information, the control information indicates that the feedback mode is disabled for Z shared channels,
Wherein Z is a positive integer less than X,
Wherein the Z shared channels are associated with a second group allocation index.
9. The method according to claim 8, wherein the method comprises,
Wherein radio resource control, RRC, signaling transmitted by the network device includes the control information indicating that the feedback mode is enabled for data received on the X shared channels,
Wherein the codebook is generated based on the first set of allocation indices associated with the Y shared channels and the second set of allocation indices associated with the Z shared channels.
10. The method according to claim 7,
Wherein the radio resource control, RRC, signaling transmitted by the network device includes the control information indicating that the feedback mode is enabled for data transmitted on the X shared channels,
Wherein the downlink control information, DCI, transmitted by the network device indicates that the feedback mode is enabled, only negative acknowledgement indications for Z shared channels are received,
Wherein Z is a positive integer less than X,
Wherein the codebook is generated based on the first set of allocation indices associated with the Y shared channels,
Wherein the codebook includes the negative acknowledgement indication for at least one allocation index associated with at least one of the Z shared channels to indicate that data of the at least one shared channel was erroneously decoded by the communication device.
11. The method of claim 7, further comprising:
the network device receives a second codebook, the second codebook including feedback for data received on Z shared channels,
Wherein Z is a positive integer less than X,
Wherein the radio resource control, RRC, signaling transmitted by the network device includes the control information indicating that the feedback mode is enabled for data transmitted on the X shared channels,
Wherein downlink control information, DCI, indicates that the second codebook is a type 1 codebook,
Wherein the codebook is a type 2 codebook generated based on the first set of allocation indices associated with the Y shared channels.
12. The method according to claim 7,
Wherein radio resource control, RRC, signaling transmitted by the network device includes the control information indicating that the feedback mode is disabled for data received on the X shared channels,
Wherein the codebook received by the network device does not include feedback for the data received by the X shared channels.
13. The method according to any one of claim 1 to 12,
Wherein one or more of the first set of allocation indices or the second set of allocation indices comprises one or more downlink allocation indices DAIs,
Wherein the X shared channels include a group common physical downlink shared channel GC-PDSCH.
14. A method of wireless communication, comprising:
The network device transmitting first control information to a first group of communication devices, the first control information indicating whether the first group of communication devices enables a feedback mode to send feedback for data received on a plurality of shared channels;
The network device transmits second control information to a second group of communication devices, the second control information indicating disabling the second group of communication devices from enabling the feedback mode to send feedback for data received on the plurality of shared channels.
15. A method of wireless communication, comprising:
The network device transmitting first control information to a first group of communication devices, the first control information indicating whether the first group of communication devices enables a feedback mode to send feedback for data received on a plurality of shared channels;
The network device transmits second control information to a second group of communication devices indicating that the second group of communication devices are capable of enabling the feedback mode to send feedback for data received on the plurality of shared channels.
16. The method of any of claims 14-15, wherein the plurality of shared channels comprises a plurality of group common physical downlink shared channel GC-PDSCH.
17. An apparatus for wireless communication, comprising a processor to implement the method of any one or more of claims 1-16.
18. A non-transitory computer readable program storage medium having code stored thereon, which when executed by a processor, causes the processor to implement the method of any one or more of claims 1 to 16.
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