CN116686246A

CN116686246A - Hybrid automatic repeat request acknowledgement codebook generation technique

Info

Publication number: CN116686246A
Application number: CN202180089304.8A
Authority: CN
Inventors: 寇帅华; 苟伟; 郝鹏; 张峻峰
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2023-09-01
Also published as: WO2022236534A1

Abstract

Techniques to generate a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook are described. An exemplary wireless communication method includes: performing, by the communication device, a first determination: transmission resources for sharing an outbound channel span a plurality of sub-slots within a time slot comprising the plurality of sub-slots, the plurality of sub-slots configured for controlling the outbound channel; performing, by the communication device, a second determination: whether to generate a HARQ-ACK codebook for one or more of the plurality of sub-slots; and transmitting, by the communication device, the shared outbound channel with a HARQ-ACK codebook in response to the first determination and the second determination; wherein the HARQ-ACK codebook is configured to indicate whether the communication device received a transmission in one or more time slots temporally preceding the plurality of sub-slots.

Description

Hybrid automatic repeat request acknowledgement codebook generation technique

Technical Field

The present disclosure relates generally to digital wireless communications.

Background

Mobile communication technology is pushing the world to an increasingly interconnected and networked society. Next generation systems and wireless communication technologies need to support a wider range of use case features and provide more complex and finer access requirements and flexibility than existing wireless networks.

Long-Term Evolution (LTE) is a wireless communication standard developed by the third generation partnership project (3rd Generation Partnership Project,3GPP) for mobile devices and data terminals. LTE-Advanced (LTE-a) is a wireless communication standard that enhances the LTE standard. The 5 th generation wireless system, referred to as 5G, advances the LTE and LTE-a wireless standards and is dedicated to support higher data rates, large numbers of connections, ultra low latency, high reliability, and other emerging traffic demands.

Disclosure of Invention

Techniques for hybrid automatic repeat request acknowledgement (hybrid automatic repeat request acknowledgement, HARQ-ACK) codebook generation are disclosed.

An exemplary wireless communication method includes: the first determination is performed by a communication device (e.g., user equipment): transmission resources for sharing the outbound channel span a plurality of sub-slots within a slot comprising a plurality of sub-slots, the plurality of sub-slots configured for controlling the outbound channel; performing, by the communication device, a second determination: whether to generate a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook for one or more of the plurality of sub-slots; and transmitting, by the communication device, the shared outbound channel with a HARQ-ACK codebook in response to the first determination and the second determination; wherein the HARQ-ACK codebook is configured to indicate whether the communication device received a transmission in one or more time slots temporally preceding the plurality of sub-slots.

In some embodiments, the method further comprises: transmitting, by the communication device, the shared outbound channel without the HARQ-ACK codebook in response to the first determination and the second determination. In some embodiments, the shared outbound channel is scheduled by control information that does not include a downlink allocation index (downlink assignment index, DAI) configured to indicate whether to generate the HARQ-ACK codebook for the plurality of sub-slots. In some embodiments, the shared outbound channel is associated with a lack of control information that schedules the shared outbound channel. In some embodiments, the method further comprises: receiving, by the communication device, a shared inbound channel; performing a third determination: a sub-slot carrying the HARQ-ACK codebook for the shared inbound channel overlaps with the shared outbound channel, wherein the plurality of sub-slots includes the sub-slot; generating a HARQ-ACK codebook for the plurality of sub-slots or the sub-slot; the shared outbound channel with the HARQ-ACK codebook is transmitted by the communication device in response to the third determination and the generating. In some embodiments, the communication device receives control information that schedules the shared outbound channel, the control information including a Downlink Allocation Index (DAI) configured to indicate whether to generate the HARQ-ACK codebook for the plurality of sub-slots.

In some embodiments, the DAI comprises a plurality of subfields, each subfield corresponding to one of the plurality of subfields, each subfield configured to indicate whether HARQ-ACK information bits are generated for a sub-slot corresponding to the subfield, the HARQ-ACK codebook comprising HARQ-ACK information. In some embodiments, the number of the plurality of subfields is equal to the number of sub-slots of the time slot. In some embodiments, the number of the plurality of subfields is equal to a maximum number of the plurality of subfields allowed to overlap with the shared outbound channel. In some embodiments, the HARQ-ACK codebook for the one or more of the plurality of sub-slots is generated by: the HARQ-ACK codebook is generated based on the plurality of slots in a first codebook window including the plurality of slots, first in a first order of slot indexes of the plurality of slots, and second in a second order of serving cell indexes. In some embodiments, a time slot of the plurality of time slots that cannot be used for shared inbound channel transmission is excluded from the first codebook window. In some embodiments, the one time slot that cannot be used for the shared inbound channel transmission overlaps with a measurement gap in which the communication device does not perform transmission or reception with a serving cell.

In some embodiments, the one time slot that cannot be used for the shared inbound channel transmission is a time slot in which the communication device is not active. In some embodiments, the one time slot that cannot be used for the shared inbound channel transmission does not have a corresponding available monitoring occasion for controlling inbound channel transmission.

In some embodiments, the method further comprises: determining that a shared inbound channel is received on a first time slot in the first codebook window, wherein an indication is provided to indicate that HARQ-ACKs for the shared inbound channel are located on the one or more sub-time slots; and in response to the determination, setting HARQ-ACK information bits corresponding to the first time slot in the HARQ-ACK codebook according to a decoding result of the shared inbound channel; the HARQ-ACK information bit is set to an Acknowledgement (ACK) in response to the decoding result of the shared inbound channel being successful; the HARQ-ACK information bit is set to non-acknowledgement (NACK) in response to the decoding result failure of the shared inbound channel. In some embodiments, the method further comprises: determining that a shared inbound channel is not received on a second time slot in the first codebook window or is received on the second time slot in the first codebook window, wherein an indication is provided to indicate that HARQ-ACKs for the shared inbound channel are not included in any of the one or more sub-time slots; and in response to the determination, setting HARQ-ACK information bits in the HARQ-ACK codebook corresponding to the first slot to non-acknowledgements (NACKs).

In some embodiments, the communication device determines the locations of the plurality of time slots included in the first codebook window based on the following condition: (1) Generating one or more positions of the one or more sub-slots for which the HARQ-ACK codebook is intended, and (2) a set of time interval values indicating a time difference between any of the one or more sub-slots for which the HARQ-ACK codebook is intended and one of the plurality of slots. In some embodiments, the first codebook window is determined by combining one or more codebook windows corresponding to the one or more sub-slots for which the HARQ-ACK is generated. In some embodiments, one of the one or more codebook windows comprises a plurality of slots based on the following condition: (1) A position of a sub-slot corresponding to a codebook window, and (2) a set of time interval values indicating a time difference between any of the plurality of slots and the sub-slot. In some embodiments, the shared outbound channel comprises a physical uplink shared channel (physical uplink shared channel, PUSCH). In some embodiments, the control outbound channel comprises a physical uplink control channel (physical uplink control channel, PUCCH). In some embodiments, the shared inbound channel comprises a physical downlink shared channel (physical downlink shared channel, PDSCH). In some embodiments, the control inbound channel comprises a physical downlink control channel (physical downlink control channel, PDCCH).

Another exemplary wireless communication method includes: the first determination is performed by a network device (e.g., a base station): transmission resources for sharing an outbound channel span a plurality of sub-slots within a time slot comprising the plurality of sub-slots, the plurality of sub-slots configured for controlling the outbound channel; and receiving, by the network device, the shared outbound channel with a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook for one or more of the plurality of sub-slots in response to the first determination, the HARQ-ACK codebook configured to indicate whether a communication device received a transmission in one or more slots temporally preceding the plurality of sub-slots.

In some embodiments, the shared outbound channel is scheduled by control information that does not include a Downlink Allocation Index (DAI) configured to indicate whether to generate the HARQ-ACK codebook for the plurality of sub-slots. In some embodiments, the shared outbound channel is associated with a lack of control information that schedules the shared outbound channel. In some embodiments, the method further comprises: transmitting a shared inbound channel to the communication device; and receiving, by the network device, the shared outbound channel with a HARQ-ACK codebook in response to transmitting the shared inbound channel. In some embodiments, the network device transmits control information that schedules the shared outbound channel, and the control information includes a Downlink Allocation Index (DAI) configured to indicate whether to generate the HARQ-ACK codebook for the plurality of sub-slots.

In some embodiments, the DAI comprises a plurality of subfields, each subfield corresponding to one of the plurality of subfields, each subfield configured to indicate whether HARQ-ACK information bits corresponding to a sub-slot of the subfield are generated, and the HARQ-ACK codebook comprises the HARQ-ACK information. In some embodiments, the number of the plurality of subfields is equal to the number of sub-slots in the time slot. In some embodiments, the number of the plurality of subfields is equal to a maximum number of the plurality of subfields allowed to overlap with the shared outbound channel. In some embodiments, the shared outbound channel comprises a Physical Uplink Shared Channel (PUSCH). In some embodiments, the control outbound channel comprises a Physical Uplink Control Channel (PUCCH). In some embodiments, the shared inbound channel comprises a Physical Downlink Shared Channel (PDSCH).

In yet another exemplary aspect, the above-described method is embodied in the form of processor-executable code and stored in a non-transitory computer-readable storage medium. Code included in a computer readable storage medium, when executed by a processor, causes the processor to implement the methods described in this patent document.

In yet another exemplary embodiment, an apparatus configured or operable to perform the above method is disclosed.

The above and other aspects and embodiments thereof are described in more detail in the accompanying drawings, description and claims.

Drawings

Fig. 1 shows an example of a codebook window including a plurality of slots in the time domain.

Fig. 2 is an example of a plurality of start and length indicator values (start and length indicator value, SLIV) in a slot.

Fig. 3 shows an example of scheduled PUSCH transmissions across multiple sub-slots.

Fig. 4 and 5 illustrate examples of codebook generation techniques.

Fig. 6 shows an example of a scheduled physical uplink shared channel (physical uplink shared channel, PUSCH).

Fig. 7 shows an example of multiplexing of high priority HARQ-ACKs and low priority HARQ-ACKs.

Fig. 8 shows an exemplary block diagram of a hardware platform that may be part of a network node or user equipment.

Fig. 9 illustrates an example of wireless communication including a Base Station (BS) and a User Equipment (UE) in accordance with some implementations of the disclosed technology.

Fig. 10 and 11 illustrate exemplary flowcharts of methods for HARQ-ACK codebook processing techniques.

Detailed Description

In the New air interface (NR), a sub-slot is introduced for physical uplink control channel (physical uplink control channel, PUCCH) transmission. Some types of PUCCHs cannot be performed across sub-slot boundaries, e.g., PUCCHs carry HARQ feedback information. If more than one PUCCH overlaps with a physical uplink shared channel (physical uplink shared channel, PUSCH) or another PUCCH in the time domain, uplink control information (uplink control information, UCI) carried by the more than one PUCCH is multiplexed on the PUSCH or PUCCH. The problem of how to set the downlink allocation index (downlink assignment index, DAI) in the downlink control information (downlink control information, DCI) of the scheduled PUSCH and how to generate the HARQ-ACK codebook needs to be solved.

The following example headings of various sections are used to facilitate an understanding of the disclosed subject matter and are not intended to limit the scope of the claimed subject matter in any way. Thus, one or more features of one example portion may be combined with one or more features of another example portion. Furthermore, the 5G terminology is used for clarity of explanation, but the techniques disclosed herein are not limited to 5G techniques and may be applied to wireless systems implementing other protocols.

Summary of I

In a wireless communication system, there is a time interval (e.g., an offset) between PDSCH and corresponding PUCCH, which is referred to as a first time interval in this patent document. The first time interval is a plurality of time units between PDSCH and corresponding PUCCH. The time units may be Orthogonal Frequency Division Multiplexing (OFDM) symbols, sub-slots, subframes, frames, milliseconds, etc. For example, the first time interval is K time slots (K.gtoreq.0). If the UE receives PDSCH on slot n, the UE transmits PUCCH on slot n+k. The time units may be different for the first time interval, PDSCH, and PUCCH. In order to determine the time position of the PDSCH or the time position of the PUCCH, each time cell should be changed (e.g., transformed, converted) to coincide with each other. For example, the first time interval is k sub-slots. PDSCH is transmitted on slot n. The time slot is converted into a sub-slot. PDSCH may be transmitted on more than one sub-slot. The end of PDSCH is within sub-slot n 1. Thus, the PUCCH is transmitted over sub-slots n1+k. Sometimes, if the subcarrier spacing is different for different cells, the duration of the time units is also different. In this case, the time units should be made uniform. The disclosed embodiments may be applicable to any form of time cell. In this patent document, sub-slots or time slots are taken as examples.

The network may configure the UE with a plurality of values for the first time interval. For a particular scheduled PDSCH transmission, a particular value of the plurality of values of the first time interval is further indicated.

The UE may transmit a PUCCH for carrying the HARQ-ACK codebook on the first slot (e.g., slot n). For the HARQ-ACK codebook, the codebook window includes the following slots: the time slot meets a first time interval requirement between the indicated time slot and the first time slot. For example, the indicated first time interval comprises k1 time slots, k2 time slots, k3 time slots, k4 time slots, k5 time slots, k6 time slots. The corresponding codebook window includes time slot n-k1, time slot n-k2, time slot n-k3, time slot n-k4, time slot n-k5, and time slot n-k6. A codebook is determined for the first slot based on the codebook window. For this example, the codebook is determined first in the order of sub-slots and second in the order of serving cell indexes. Each slot corresponds to one or more bits in the codebook in the order of the slot index and then in the order of the serving cell index.

In one example, each slot in the serving cell in the codebook window corresponds to a bit in the codebook. For example, the UE may receive only one PDSCH in one slot. For a slot in the codebook window, if the UE detects a PDSCH on the slot and the indicated PUCCH resource for HARQ-ACK feedback is on the first slot, HARQ-ACK is set for the corresponding bit according to the PDSCH decoding result. In this patent document, this time slot is referred to as a first type of time slot. If the UE successfully decodes the PDSCH, an ACK is set. If the UE does not successfully decode the PDSCH, a NACK is set. For a slot in the codebook window, if the UE does not detect PDSCH on the slot or the UE detects PDSCH on the slot, but the indicated PUCCH resource for HARQ-ACK feedback is not on the first slot, a NACK is set for the corresponding bit. In this patent document, this time slot is referred to as a second type of time slot.

Fig. 1 is an example of a codebook window including a plurality of slots in the time domain. One or more of the plurality of slots (e.g., slot 0 through slot 6) may be configured to carry PDSCH. The PUCCH carrying HARQ-ACK is transmitted on slot 6. The configuration values of the first time interval are 2, 3, 4 and 5 time slots. Thus, the codebook window includes slot 1, slot 2, slot 3, and slot 4. A codebook is determined based on the codebook window. Assuming that only 1 bit is generated per slot, the HARQ-ACK codebook has 4 bits, where slot 1 corresponds to the first bit, slot 2 corresponds to the second bit, and so on. The UE does not detect PDSCH on slot 1 and slot 2 (e.g., slots of the second type). The first bit and the second bit in the codebook are set to NACK. The UE detects PDSCH on slot 3 and transmits a corresponding PUCCH for HARQ-ACK on slot 6 (slot 3 is the first type of slot). Therefore, the third in the codebook is set as the decoding result of PDSCH on slot 3, for example, ACK in case of successful decoding and NACK in case of failure of decoding. The UE detects PDSCH on slot 4 but transmits the corresponding PUCCH for HARQ-ACK on slot 7 (slot 4 is the second type of slot). The fourth bit in the codebook is set to NACK.

In another example, each slot in the serving cell in the codebook window corresponds to more than one bit in the codebook. For example, the UE can receive more than one PDSCH in a slot. For PDSCH transmission, time domain resources are indicated (e.g., configured, signaled). For example, time domain resources are indicated in the form of start and duration, which is referred to in this patent document as start and length indicators (start and length indicator, SLI). The UE may be configured with a plurality of start and length indicator values (start and length indicator value, SLIV) to indicate time domain resources of the data channel. For a particular transmission, one of the plurality of SLIV is indicated.

To determine the number of bits corresponding to a slot within the codebook window, the number of SLIV groups should be determined. First, if the indicated time domain resource overlaps with any UL (uplink) symbol, then each SLIV is excluded. A first set of SLIVs is determined from the plurality of SLIVs. The first SLIV group includes SLIV of the plurality of SLIV's having an earliest ending symbol and all SLIV's overlapping the SLIV's in the time domain. The SLIV in the first SLIV group is excluded from the plurality of SLIV. From the remaining SLIV, a second SLIV set is determined using the same method and excluded. The same method is then used to determine the following SLIV groups until all SLIV groups are determined (e.g., no SLIV remains). Each of the SLIV sets corresponds to a bit.

Fig. 2 is an example of multiple SLIVs in a time slot based on the example of fig. 1. Fig. 2 shows a slot comprising 14 orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols, wherein a plurality of SLIVs are located on a plurality of OFDM symbols. It is assumed that all symbols are downlink symbols. It should be noted that only the time domain resources are shown. Of the six SLIV, SLIV 1 has the earliest ending symbol (e.g., symbol # 2). Thus, SLIV 1 belongs to the first SLIV group. In addition, since SLIV 4 overlaps with SLIV 1, SLIV 4 also belongs to the first SLIV group. The first SLIV group is excluded. The remaining SLIV includes SLIV 2, SLIV 3, SLIV 5, and SLIV 6, where SLIV 6 has the earliest ending symbol (e.g., symbol # 6). Thus, SLIV 6 belongs to the second SLIV group. In addition, since SLIV 2 and SLIV 3 overlap with SLIV 6, SLIV 2 and SLIV 3 belong to the second SLIV group. The second SLIV group is also excluded. The remaining SLIV includes SLIV 5, SLIV 5 belonging to the third SLIV. Assuming that 1 bit corresponds to one SLIV group, the HARQ-ACK information bit of one slot has 3 bits, where the first bit corresponds to a first SLIV group, the second bit corresponds to a second SLIV group, and so on. If slots 1 through 4 in fig. 1 are all downlink slots, the codebook window has a total of 12 bits. The sequence of the corresponding SLIV groups is a first SLIV group in time slot 1, a second SLIV group in time slot 1, a third SLIV group in time slot 1, a first SLIV group in time slot 2, a second SLIV group in time slot 2, a third SLIV group in time slot 2, a first SLIV group in time slot 3, a second SLIV group in time slot 3, a third SLIV group in time slot 3, a first SLIV group in time slot 4, a second SLIV group in time slot 4, and a third SLIV group in time slot 4. It will be appreciated that slots 1 to 4 have the same SLIV set.

For a SLIV group in a slot, if a UE detects a PDSCH having time domain resources indicated by SLIV in the SLIV group and indicates that a corresponding PUCCH for HARQ-ACK feedback is on a first slot, bits corresponding to the SLIV group are set according to PDSCH decoding results. In this patent document, this SLIV set is referred to as a first type of SLIV set. If the UE successfully decodes the PDSCH, an ACK is set. If the UE does not successfully decode the PDSCH, a NACK is set. For example, if the UE detects a PDSCH with time domain resources indicated by SLIV 1 or SLIV 4 and the corresponding PUCCH indicated for HARQ-ACK feedback is on slot 6, bits corresponding to the first SLIV group are set according to the PDSCH decoding result. For a SLIV group in a slot, if the UE does not detect a PDSCH on the slot, or the UE detects a PDSCH with time domain resources indicated by SLIV in the SLIV group, but the corresponding PUCCH indicating for HARQ-ACK feedback is not on the first slot, a bit corresponding to the SLIV group is set to NACK. In this patent document, this SLIV set is referred to as a second type of SLIV set.

Example 1

In some embodiments, slots that cannot be scheduled for PDSCH transmission are excluded from the codebook window (e.g., the first slot is not in the codebook window). If a slot overlaps with a measurement gap in the time domain, the slot cannot be scheduled for PDSCH transmission. Further, if a slot overlaps with a measurement gap in the time domain, where it is indicated that the UE cannot perform transmission or reception with a serving cell in the measurement gap, the slot cannot be scheduled for PDSCH transmission. Still referring to fig. 1, if slot 1 and slot 2 overlap with the measurement gap in the time domain, these slots should be excluded from the codebook window, so the codebook window of slot 6 includes slot 3 and slot 4.

For the first slot, if the UE is in a dormant state, the first slot cannot be scheduled for PDSCH transmission and is excluded from the codebook window (e.g., the first slot is not in the codebook window). For example, the UE is not in discontinuous reception (discontinuous reception, DRX) active time. Still referring to fig. 1, the UE is not at an active time before slot 3 and the UE wakes up from slot 3 to perform transmission and reception. Thus, slot 1 and slot 2 are not in the codebook window, and the codebook window includes slot 3 and slot 4.

For the first time slot, if the network cannot schedule PDSCH transmissions on that first time slot, the first time slot cannot be scheduled for PDSCH transmissions and is excluded from the codebook window (e.g., the first time slot is not in the codebook window). Alternatively, the codebook window includes time slots that may be used for PDSCH transmission. For example, for any value of the time interval between PDCCH and PDSCH, there is no PDCCH monitoring occasion available to indicate PDSCH transmission on a slot that cannot be scheduled for PDSCH transmission. More specifically, the time intervals between PDCCH and PDSCH are a1, a2, … …, aN. For slot n, if there is no PDCCH monitoring occasion available on any of slots n-a1, n-a2, … …, n-aN, then slot n cannot be scheduled for PDSCH transmission. For example, there is no PDCCH search space in slots n-a1, n-a2, … …, n-aN, or the UE does not need to monitor PDCCH on slots n-a1, n-a2, … …, n-aN due to the UE not being in active time or there being aN overlap between slots n-a1, n-a2, … …, n-aN and measurement gaps, etc. Still referring to fig. 1, the time interval between pdcch and PDSCH is 0 or 1 slot. PDCCH search spaces exist on slot 2, slot 3, slot 4, slot 5. Thus, the UE needs to monitor the PDCCH on slot 2, slot 3, slot 4 and slot 5. For slot 1, it is not possible to schedule PDSCH transmissions on slot 1 since there is no PDCCH search space on slots 0 and 1. Thus, slot 1 is excluded from the codebook window. For slot 2, PDSCH transmission may be performed if the scheduling PDCCH is transmitted on slot 2. Thus, slot 2 is in the codebook window. Similarly, slot 3 and slot 4 are in the codebook window. Thus, the codebook window includes slot 2, slot 3, and slot 4.

This facilitates a reduction in codebook size and a reduction in resource utilization.

EXAMPLE 2

In some embodiments, the UE will transmit PUSCH across multiple sub-slots. In one example, PUSCH is scheduled by control information (e.g., DCI). The control information includes a downlink allocation index (downlink assignment index, DAI). The downlink allocation index indicates whether there is a PUCCH overlapping the scheduled PUSCH in the time domain, wherein the PUCCH carries HARQ-ACK information bits. If such a PUCCH exists, the HARQ-ACK information bits are multiplexed in the PUSCH. This means that the purpose of the downlink allocation index is also to indicate whether HARQ-ACK information is multiplexed in PUSCH. For example, the value of DAI is set to '0' to indicate that there is no such PUCCH overlapping the scheduled PUSCH in the time domain. The value of DAI is not set to '0' to indicate that there is such PUCCH overlapping the scheduled PUSCH in the time domain, e.g., the value of DAI is set to '1'.

From the UE's point of view, if DAI in control information for scheduling PUSCH is set to 0, the UE does not generate HARQ-ACK codebook for multiplexing in PUSCH. If the DAI in the control information for scheduling PUSCH is not set to '0', the UE generates a HARQ-ACK codebook for each sub-slot overlapping the scheduled PUSCH in the time domain. The HARQ-ACK codebook is multiplexed in the scheduled PUSCH transmission.

Fig. 3 shows an example of scheduled PUSCH transmissions across multiple sub-slots. As shown, a slot includes 7 sub-slots, denoted as sub-slot 0 through sub-slot 6, respectively. The scheduled PUSCH 1 transmission overlaps with sub-slots 1 through 4. The scheduled PUSCH 2 transmission overlaps with sub-slots 2 through 5. For PUSCH 1, if DAI in the corresponding control information is set to 0, the UE does not generate HARQ-ACK codebook for multiplexing in PUSCH 1. If the DAI in the corresponding control information is not set to 0, the UE generates HARQ-ACK codebooks for sub-slot 1 to sub-slot 4. The HARQ-ACK codebook is multiplexed in PUSCH 1. For PUSCH 2, if the DAI in the corresponding control information is not set to 0, the UE generates HARQ-ACK codebook for sub-slot 2 to sub-slot 5. The HARQ-ACK codebook is multiplexed in PUSCH 2.

In some embodiments, the DAI in the control information includes a plurality of subfields. Each subfield corresponds to one or more consecutive sub-slots overlapping the scheduled PUSCH in the time domain. Similarly, the subfield indicates whether there is a PUCCH on the corresponding one or more consecutive sub-slots overlapping with the PUSCH, wherein the PUCCH carries HARQ-ACK information bits. The PUCCHs on the corresponding one or more consecutive sub-slots overlap the scheduled PUSCH in the time domain. From the UE's point of view, if the values of all subfields in the DAI in the control information for scheduling PUSCH are set to 0, the UE does not generate the HARQ-ACK codebook for multiplexing in the scheduled PUSCH. Otherwise, the UE generates a HARQ-ACK codebook for a sub-slot in which the value of the corresponding sub-field in the DAI in the control information is not set to '0'. The HARQ-ACK codebook is multiplexed in the scheduled PUSCH transmission.

In some embodiments, the length of the DAI is configured by the network or specified by the protocol. Alternatively, the number of subfields included in the DAI is configured by the network or specified by the protocol. In some embodiments, the number of subfields included in the DAI is determined according to the available time domain resources of the PUSCH. According to the SLIV configured for PUSCH, PUSCH may overlap with at most Z sub-slots in the time domain. The number of subfields in the DAI is Z.

In one example, the subfields in the DAI correspond to the subfields within the time slot of the scheduled PUSCH starting from the first subfield. More specifically, the first subfield in the DAI corresponds to the first sub-slot within the slot. In this case, for a sub-slot that does not overlap with the scheduled PUSCH in the time domain, the value of the corresponding sub-field is set to '0'. The second subfield in the DAI corresponds to the second sub-slot within the slot, and so on. In another example, the subfields in the DAI correspond to the respective sub-slots starting from the first sub-slot overlapping the scheduled PUSCH in the time domain. More specifically, the first subfield in the DAI corresponds to the first sub-slot overlapping the scheduled PUSCH. The second subfield in the DAI corresponds to the second sub-slot overlapping the scheduled PUSCH, and so on. For a particular PUSCH transmission, there may not be a sub-slot corresponding to the last subfield in the DAI. For the subfields without corresponding subfields, the value thereof is set to '0'.

Still referring to fig. 3, there are 7 subfields, denoted as subfields a through G, in the DAI of control information. In one example, starting from the first sub-slot within a slot, sub-field a corresponds to sub-slot 0. The subfield B corresponds to the subslot 1. Similarly, subfields C, D, E, F and G correspond to subslots 2, 3, 4, 5, and 6, respectively. Since the sub-slots 0, 5, and 6 do not overlap with PUSCH 1 in the time domain, the values of the sub-fields A, F and G in the control information of scheduled PUSCH 1 are set to 0. Similarly, since the sub-slots 0, 1, and 6 do not overlap with PUSCH 2 in the time domain, the values of the sub-fields A, B and G in the control information of scheduled PUSCH 2 are always set to 0. Assuming that each subfield is 1 bit, the bit information '0010100' means that the UE generates HARQ-ACK codebook for the sub-slot 2 and the sub-slot 4.

In another example, each subfield corresponds to each sub-slot starting from the first sub-slot overlapping the PUSCH. For PUSCH 1, sub-field a corresponds to sub-slot 1. Similarly, subfields B, C and D correspond to subslots 2, 3, and 4, respectively. For subfields E, F and G, there is no corresponding sub-slot, and thus, their values are set to '0'. For PUSCH 2, sub-field a corresponds to sub-slot 2. Similarly, subfields B, C and D correspond to subslots 3, 4, and 5, respectively. For subfields E, F and G, there is no corresponding sub-slot, and thus, their values are set to '0'. Assuming that each subfield is 1 bit, for PUSCH 1, bit information '1101000' means that the UE generates HARQ-ACK codebooks for sub-slots 1, 2 and 4. For PUSCH 2, bit information '1101000' means that the UE generates HARQ-ACK codebooks for sub-slots 2, 3 and 5.

In some embodiments, no DAI field is present in the control information for scheduling PUSCH, or even no control information for scheduling PUSCH (e.g., PUSCH configured with grants). When the UE receives at least one PDCCH for scheduling the PDSCH in which the corresponding HARQ-ACK is transmitted on a sub-slot overlapping the PUSCH, the UE should generate a HARQ-ACK codebook for all sub-slots overlapping the PUSCH, and the HARQ-ACK codebook is multiplexed in the PUSCH.

In some embodiments, for PUSCH across multiple sub-slots, due to the detected PDCCH or PDSCH, the UE generates a HARQ-ACK codebook only for each sub-slot for which the UE will transmit HARQ-ACKs. If the UE does not detect any PDCCH or PDSCH with corresponding HARQ-ACKs transmitted on any of the multiple sub-slots, the UE does not generate a HARQ-ACK codebook for multiplexing in the PUSCH.

Still referring to fig. 3, for PUSCH 1, if the UE does not detect any PDCCH or PDSCH with corresponding HARQ-ACKs transmitted on sub-slot 1 to sub-slot 4, the UE does not generate a codebook for multiplexing in PUSCH 1. If the UE detects only the PDCCH or PDSCH with the corresponding HARQ-ACK transmitted on sub-slot 1, the UE generates a HARQ-ACK codebook for multiplexing in PUSCH 1 for sub-slot 1. If the UE detects a plurality of PDCCHs or PDSCHs with corresponding HARQ-ACKs transmitted on sub-slot 1 and sub-slot 3 and does not detect a PDCCH or PDSCH with corresponding HARQ-ACKs transmitted on sub-slot 2 and sub-slot 4, the UE generates a HARQ-ACK codebook for multiplexing in PUSCH 1 for sub-slot 1 and sub-slot 3. In another example, if the UE detects a PDCCH or PDSCH with corresponding HARQ-ACK feedback transmitted on sub-slot 1, the UE generates a HARQ-ACK codebook for multiplexing in PUSCH 1 for sub-slot 1 through sub-slot 4.

Based on the above indication, the UE can know that the sub-slot of the HARQ-ACK codebook should be generated even if the UE misses the PDCCH for scheduling the PDSCH. Therefore, this is beneficial because the UE and the network have the same understanding of the HARQ-ACK codebook.

IV. example 3

Method 1:

in some embodiments, the UE will transmit HARQ-ACKs on multiple sub-slots. The plurality of sub-slots overlap PUSCH in the time domain. The UE generates a HARQ-ACK codebook for the plurality of sub-slots and multiplexes the codebook in PUSCH transmission.

For the HARQ-ACK codebook for the plurality of sub-slots, the codebook window includes the slots: the time slot meets a requirement of a first time interval between the indicated time slot and any of the plurality of sub-time slots. According to the above embodiment, a codebook is generated based on the determined codebook window. If there is a PDSCH and its indicated PUCCH resource for HARQ-ACK is on any one of the plurality of sub-slots, HARQ-ACK of PDSCH is set for the corresponding bit in the codebook. If there is a PDSCH of the indicated PUCCH resource for HARQ-ACK on any one of the plurality of sub-slots, HARQ-ACK for PDSCH is set to NACK for the corresponding bit in the codebook.

Fig. 4 shows an example of codebook generation. The UE transmits PUCCH on sub-slot 6-1 and sub-slot 6-2. The sub-slot 6-1 and the sub-slot 6-2 overlap PUSCH (not shown in fig. 4) in the time domain. The UE generates HARQ-ACK codebooks for sub-slot 6-1 and sub-slot 6-2. The first time interval configured includes 2, 3, 4, 5, 6, 7, 8, and 9 sub-slots. The codebook window does not include slot 0 because the time interval between slot 0 and sub-slot 6-1 is 11 sub-slots and the time interval between slot 0 and sub-slot 6-2 is 12 sub-slots, thus not meeting the requirements. Because the time interval between the time slot 1 and the sub-time slot 6-1 is 9 sub-time slots, the time slot 1 belongs to a codebook window, thereby meeting the requirement. Similarly, the codebook window includes slot 2, slot 3, slot 4, and slot 5 in addition to slot 0. The time intervals between these time slots and sub-slots 6-1 and 6-2 are shown in table 1.

TABLE 1

	Time slot 0	Time slot 1	Time slot 2	Time slot 3	Time slot 4	Time slot 5	Time slot 6
								Sub-slot 6-1	11	9	7	5	3	1	0
Sub-slot 6-2	12	10	8	6	4	2	0

Assuming that one bit corresponds to one slot in the codebook window, there are a total of 5 bits. The UE detects PDSCH on slot 2, slot 4 and slot 5 and the corresponding PUCCHs for HARQ-ACKs are transmitted on sub-slot 6-1, sub-slot 6-2, respectively. Corresponding bits (e.g., second, fourth, and fifth bits) in the codebook are set according to decoding results of PDSCH on slot 2, slot 4, and slot 5, respectively. For other bits (e.g., first bit and third bit) in the codebook, a NACK is set.

Method 2:

for each of the plurality of sub-slots, each codebook window is determined according to the above-described embodiment. Multiple codebook windows are combined (e.g., merged) to form a final codebook window. According to the above embodiment, the codebook is generated based on the final codebook window. The HARQ-ACK information bits are generated only once in the codebook for a time slot (or sub-slot) belonging to more than one codebook window. More specifically, the HARQ-ACK information bit corresponding to the slot is set only once according to the decoding result of the PDSCH. If the UE does not detect any PDSCH on a slot or the UE detects a PDSCH on the slot but the corresponding PUCCH for HARQ-ACK is not transmitted on any one of the sub-slots, the bit corresponding to the slot is set to NACK only once.

Fig. 5 shows another example of codebook generation. As shown, the UE transmits PUCCH on sub-slot 6-1 and sub-slot 6-2. The sub-slot 6-1 and the sub-slot 6-2 overlap PUSCH (not shown in fig. 5) in the time domain. The UE generates HARQ-ACK codebooks for sub-slot 6-1 and sub-slot 6-2. The first time interval comprises 3, 4, 5, 6, 7, 8, 9, 10 sub-slots. Thus, for sub-slot 6-1, the corresponding codebook window (codebook window 1 in FIG. 5) includes sub-slot 1-1, sub-slot 1-2, sub-slot 2-1, sub-slot 2-2, sub-slot 3-1, sub-slot 3-2, sub-slot 4-1, and sub-slot 4-2. For sub-slot 6-2, the corresponding codebook window (codebook window 2 in FIG. 5) includes sub-slot 1-2, sub-slot 2-1, sub-slot 2-2, sub-slot 3-1, sub-slot 3-2, sub-slot 4-1, sub-slot 4-2, and sub-slot 5-1.

The two codebook windows are combined to form a final codebook window that includes sub-slot 1-1, sub-slot 1-2, sub-slot 2-1, sub-slot 2-2, sub-slot 3-1, sub-slot 3-2, sub-slot 4-1, sub-slot 4-2, and sub-slot 5-1. A codebook is generated based on the final codebook window. Sub-slot 1-2, sub-slot 2-1, sub-slot 2-2, sub-slot 3-1, sub-slot 3-2, sub-slot 4-1 and sub-slot 4-2 belong to both codebook window 1 and codebook window 2. The HARQ-ACK information bits corresponding to these sub-slots are generated only once. For example, there is no PDSCH scheduled on sub-slot 1-2. For sub-slots 1-2, only 1-bit NACKs are generated. There is a scheduled PDSCH on sub-slot 2-2 and the corresponding PUCCH resource for HARQ-ACK is on sub-slot 6-1. Based on the decoding result of the PDSCH, only 1-bit ACK/NACK is generated. In general, there is a 9-bit codebook, assuming that 1 bit corresponds to only one sub-slot, where the first bit corresponds to sub-slot 1-1, the second bit corresponds to sub-slot 1-2, and so on.

Method 3:

for each of the plurality of sub-slots, each codebook window is determined according to the above-described embodiment. The first codebook window corresponds to a first one of the plurality of sub-slots. The second codebook window corresponds to a second sub-slot of the plurality of sub-slots, and so on. According to the above embodiment, the first codebook is generated based on the first codebook window. A second codebook is generated based on the codebook window. For a time slot in the second codebook window that also belongs to the previous codebook window (e.g., the first codebook window), the time slot may be skipped. This means that for this slot no HARQ-ACK information bits are generated in the second codebook.

If the slot is a second type slot, bits corresponding to the slot in the previous codebook are set according to the PDSCH decoding result. For a time slot in the second codebook window that does not belong to any previous codebook window, a bit corresponding to the time slot is generated according to the above-described embodiment. Corresponding bits are generated in the second codebook. Then, a second codebook is appended to the first codebook. Similarly, for a subsequent codebook window, a subsequent codebook is generated and appended to the previous codebook using the same method.

Still referring to the example in FIG. 5, the first codebook window includes sub-slots 1-1, sub-slots 1-2, sub-slot 2-1, sub-slot 2-2, sub-slot 3-1, sub-slot 3-2, sub-slot 4-1, and sub-slot 4-2. According to the above embodiment, a first codebook is generated, which includes HARQ-ACK information bits for PDSCH on sub-slot 1-1, sub-slot 1-2, sub-slot 2-1, sub-slot 2-2, sub-slot 3-1, sub-slot 3-2, sub-slot 4-1, and sub-slot 4-2. Since PDSCH exists only on sub-slot 2-2 and sub-slot 2-3 and HARQ-ACK feedback is transmitted on sub-slot 6-1, the corresponding HARQ-ACK information bit is set according to the PDSCH decoding result. For other information bits in the first codebook, a NACK is set. The second codebook window includes sub-slots 1-2, sub-slot 2-1, sub-slot 2-2, sub-slot 3-1, sub-slot 3-2, sub-slot 4-1, sub-slot 4-2, and sub-slot 5-1. For sub-slots 1-2, 2-1, 2-2, 3-1, 3-2 and 4-1, these sub-slots also belong to the first codebook window and there is no PDSCH with HARQ-ACK feedback transmitted on sub-slot 6-2. These sub-slots are skipped. This results in no HARQ-ACK information bits being generated for these sub-slots in the second codebook. Sub-slot 4-2 belongs to the first codebook window and there is a PDSCH on this sub-slot and HARQ-ACK feedback is transmitted on sub-slot 6-2. And setting HARQ-ACK information bits corresponding to the sub-slots 4-2 in the first codebook according to the PDSCH decoding result on the sub-slot 2. For sub-slot 4-2 in the second codebook, no HARQ-ACK information bits are generated. For sub-slot 5-2, it does not belong to the first codebook window. For sub-slot 5-1 in the second codebook, a HARQ-ACK information bit is generated. The second codebook is then appended to the first codebook to form the final codebook. The final codebook is multiplexed in PUSCH or another PUCCH.

This is advantageous for resource efficiency because the codebook size is small, while the UE and the network have the same understanding of the codebook size.

V. example 4

In some embodiments, the UE will transmit HARQ-ACKs on multiple sub-slots. The plurality of sub-slots overlap PUSCH in the time domain. The UE generates a HARQ-ACK codebook for the plurality of sub-slots and multiplexes the codebook in a PUSCH transmission.

For a sub-slot, if the UE detects only a semi-persistent scheduling (SPS) PDSCH release, one PDSCH, or one SPS PDSCH, and the corresponding PUCCH resource for HARQ-ACK feedback is located on the sub-slot, a 1-bit HARQ-ACK is generated for the sub-slot. The UE generates first HARQ-ACK information bits for such sub-slots of the plurality of sub-slots, wherein each bit corresponds to one sub-slot. For other slots with PUCCH transmissions corresponding to more than one SPS PDSCH release, PDSCH, or SPS PDSCH, a HARQ-ACK codebook is generated according to the above embodiments. The first HARQ-ACK information bit and the codebook are concatenated in the order of the plurality of sub-slots to form a final HARQ-ACK codebook. This may further reduce the codebook size.

VI example 5

In some embodiments, the network may configure a dynamic codebook (also referred to as a type 2 codebook) for the UE. In some embodiments, the UE will transmit PUSCH across multiple sub-slots. PUSCH is scheduled by control information. The DAI in the control information includes a plurality of subfields. Each subfield corresponds to one of the plurality of sub-slots. The value of the subfield is set to the value of the total DAI in the DCI of the PDSCH on the corresponding sub-slot for the last PUCCH resource scheduled for HARQ-ACK. If there is no such DCI, the value of the subfield is set to a maximum value (e.g., to '11' in case the subfield is 2 bits). This may avoid ambiguity in codebook size between the UE and the network due to PDCCH loss at the UE.

Fig. 6 shows one example of scheduled PUSCH. PUSCH is scheduled across six sub-slots (denoted as sub-slot 1-0, sub-slot 1-1, sub-slot 1-2, sub-slot 1-3, sub-slot 1-4, and sub-slot 1-5, respectively). The DAI in DCI scheduling PUSCH includes six subfields, where each subfield corresponds to one sub-slot. The total DAI in the DCI of the PDSCH that last scheduled transmission of HARQ-ACK feedback on sub-slot 1-0 is 3. Thus, the first DAI subfield is set to 3. PDSCH without dynamic scheduling of HARQ-ACK feedback is transmitted on sub-slot 1-1, so the second DAI subfield is set to maximum. Similarly, the third DAI subfield is set to 1. The fourth DAI subfield is set to 2. The fifth DAI subfield is set to the maximum value. The sixth DAI subfield is set to 1.

In some embodiments, the DAI in the control information indicates a sum of total DAIs in DCI of all last scheduled HARQ-ACK feedback PDSCH transmitted on multiple slots. Still referring to the example in fig. 6, DAI representation values in the control information are 3+1+2+1=7. If the length of the DAI field is 2, the value is set to 3 (i.e., mod ((7-1), 4) +1). Alternatively, the DAI in the control information indicates the total number of DCI or { serving cell, PDCCH monitoring occasion } pairs, wherein the DCI or PDCCH schedules the PDSCH with HARQ-ACK feedback transmitted on the sub-slot overlapping with the PUSCH. This may avoid ambiguity in codebook size between the UE and the network due to PDCCH loss at the UE.

VII. Example 6

In some embodiments, the network may configure the priorities of the data channels and control information. For example, the data channel and the control channel may be configured with high priority. The control information having a high priority and the control information having a low priority may be jointly encoded or separately encoded. The network may configure whether to use joint coding or separate coding through DCI, MAC CE or RRC signaling. When joint coding is used or configured, DAIs in DCI for scheduling a high-priority PDSCH are accumulated together with DAIs in DCI for scheduling a low-priority PDSCH. When separate encoding is used or configured, DAIs in DCI for scheduling a high-priority PDSCH and DAIs in DCI for scheduling a low-priority PDSCH are separately accumulated.

Fig. 7 shows an example of multiplexing of high priority HARQ-ACKs and low priority HARQ-ACKs. DCI 0 on cell 0 and DCI 1 on cell 1 schedule a Low Priority (LP) PDSCH. DCI 2 on cell 0 and DCI 3 on cell 1 schedule a High Priority (HP) PDSCH. The PUCCH corresponding to the LP PDSCH and the PUCCH corresponding to the HP PDSCH are transmitted on the same slot. The HP HARQ-ACK information bits and the LP HARQ-ACK information bits are multiplexed. If joint coding is configured, the DAIs in the DCI are continuously accumulated regardless of the priority of the scheduled PDSCH. Accordingly, the cumulative DAI in DCI 0, DCI 1, DCI 2 and DCI 3 is 1, 2, 3 and 4, respectively. The total DAI of DCI 0, DCI 1, DCI 2 and DCI 3 is 2, 4, respectively. If separate codes are configured, the DAIs in the DCI will be accumulated separately. This means that DAIs are continuously accumulated only for PDCCHs scheduling PDSCH with the same priority. Thus, the cumulative DAI in DCI 0 and DCI 1 are 1 and 2, respectively. The cumulative DAI in DCI 2 and DCI 3 are 1 and 2, respectively. The total DAI in both DCI 0 and DCI 1 is 2. The total DAI in both DCI 2 and DCI 3 is 2.

In some embodiments, the UE will transmit PUSCH across multiple sub-slots. The DAI in the control information for scheduling PUSCH includes two subfields. The first field indicates whether there is a high priority PUCCH overlapping the scheduled PUSCH in the time domain, where the high priority PUCCH carries high priority HARQ-ACK information bits. This means that the purpose of the first subfield is also to indicate whether high priority HARQ-ACK information is multiplexed on PUSCH.

The second field indicates whether there is a low priority PUCCH overlapping the scheduled PUSCH in the time domain, where the low priority PUCCH carries low priority HARQ-ACK information bits. This means that the purpose of the second subfield is also to indicate whether low priority HARQ-ACK information is multiplexed in PUSCH.

When a first PUCCH carrying high priority HARQ-ACK information bits and a second PUCCH carrying low priority HARQ-ACK information bits overlap in the time domain, or both the first PUCCH and the second PUCCH overlap with one PUSCH in the time domain, the high priority HARQ-ACK information bits and the low priority HARQ-ACK information bits are multiplexed in one PUCCH or the PUSCH. The high priority HARQ-ACK information bits are used for the high priority PDSCH and the low priority HARQ-ACK information bits are used for the low priority PDSCH. According to the above-described embodiments, a HARQ-ACK codebook including high-priority HARQ-ACK information bits and low-priority HARQ-ACK information bits is generated regardless of the priority of the PDSCH. Alternatively, the priority of the PDSCH need not be considered in generating the HARQ-ACK codebook.

In another example, the value of the first subfield is set to the total DAI in DCI of PDSCH where the last PUCCH resource for HARQ-ACK of high priority is scheduled to overlap PUSCH on time frequency. If no such DCI exists, the value of the first DAI is set to a maximum value (e.g., to '11' in case the subfield is 2 bits). The value of the second subfield is set to the total DAI in the last DCI of the last PDSCH where the PUCCH resource for HARQ-ACK of low priority is scheduled to overlap PUSCH in time frequency. If no such DCI exists, the value of the second DAI is set to a maximum value (e.g., to '11' in case the subfield is 2 bits).

Fig. 8 shows an exemplary block diagram of a hardware platform 800, which hardware platform 800 may be part of a network device (e.g., a base station) or part of a communication device (e.g., a user equipment). Hardware platform 800 includes at least one processor 810 and memory 805 having instructions stored thereon. The instructions, when executed by the processor 810, configure the hardware platform 800 to perform the operations described in the various embodiments described in figures 1-7 and 10-11, and this patent document. The transmitter 815 transmits or sends information or data to another node or another device. For example, the network device transmitter may send a message to the user equipment. Receiver 820 receives information or data transmitted or sent by another device. For example, the user equipment may receive a message from a network device.

The embodiments as described above will be applicable to wireless communications. Fig. 9 shows an example of a wireless communication system (e.g., a 5G or NR cellular network) including a base station 920 and one or more User Equipment (UEs) 911, 912, and 913. In some embodiments, the UE accesses the BS (e.g., network) using a communication link (sometimes referred to as an uplink direction, as indicated by dashed arrows 931, 932, and 933) connected to the network that enables subsequent communications from the BS to the UE (e.g., the direction shown pointing from the network to the UE, sometimes referred to as a downlink direction, as indicated by arrows 941, 942, and 943). In some embodiments, the BS transmits information (sometimes referred to as a downlink direction, as indicated by arrows 941, 942, and 943) to the UE, and then enables subsequent communications from the UE to the BS (e.g., in a direction from the UE to the BS, sometimes referred to as an uplink direction, as indicated by dashed arrows 931, 932, and 933). The UE may be, for example, a smart phone, a tablet, a mobile computer, a machine-to-machine (machine to machine, M2M) device, an internet of things (Internet of Things, ioT) device, or the like.

The UE may be, for example, a smart phone, a tablet, a mobile computer, a machine-to-machine (M2M) device, an internet of things (IoT) device, or the like.

Fig. 10 shows an exemplary flow chart of a method 1000 for HARQ-ACK codebook processing techniques. Operation 1002 includes: the first determination is performed by a communication device (e.g., a User Equipment (UE)): the transmission resources for sharing the outbound channel span a plurality of sub-slots within a slot that includes the plurality of sub-slots configured for controlling the outbound channel. Operation 1004 includes: performing, by the communication device, a second determination: whether to generate a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook for one or more of the plurality of sub-slots. Operation 1006 includes: transmitting, by the communication device, in response to the first determination and the second determination, a shared outbound channel with a HARQ-ACK codebook, wherein the HARQ-ACK codebook is configured to indicate whether the communication device received a transmission in one or more time slots temporally preceding the plurality of sub-slots.

In some embodiments, the method 1000 further comprises: the shared outbound channel without the HARQ-ACK codebook is transmitted by the communication device in response to the first determination and the second determination. In some embodiments, the shared outbound channel is scheduled by control information that does not include a Downlink Allocation Index (DAI) configured to indicate whether to generate a HARQ-ACK codebook for the plurality of sub-slots. In some embodiments, the shared outbound channel is associated with a lack of control information that schedules the shared outbound channel. In some embodiments, the method 1000 further comprises: receiving, by the communication device, the shared inbound channel; performing a third determination: a sub-slot carrying a HARQ-ACK codebook for the shared inbound channel overlapping with the shared outbound channel, the plurality of sub-slots including the sub-slot; generating a HARQ-ACK codebook for the plurality of sub-slots or the sub-slot; the shared outbound channel with the HARQ-ACK codebook is transmitted by the communication device in response to the third determination and the generating. In some embodiments, the communication device receives control information scheduling a shared outbound channel, and the control information includes a Downlink Allocation Index (DAI) configured to indicate whether to generate a HARQ-ACK codebook for the plurality of sub-slots.

In some embodiments, the DAI comprises a plurality of subfields, each subfield corresponding to one of the plurality of subfields, each subfield configured to indicate whether HARQ-ACK information bits are generated for a sub-slot corresponding to the subfield, and the HARQ-ACK codebook comprises HARQ-ACK information. In some embodiments, the number of the plurality of subfields is equal to the number of sub-slots in the slot. In some embodiments, the number of the plurality of subfields is equal to a maximum number of the plurality of subfields allowed to overlap with the shared outbound channel. In some embodiments, the HARQ-ACK codebook for one or more of the plurality of sub-slots is generated by: based on a plurality of slots in a first codebook window including the plurality of slots, a HARQ-ACK codebook is generated first in a first order of slot indexes of the plurality of slots and second in a second order of serving cell indexes. In some embodiments, a time slot of the plurality of time slots that cannot be used for shared inbound channel transmission is excluded from the first codebook window. In some embodiments, the one time slot that cannot be used for shared inbound channel transmission overlaps with a measurement gap in which the communication device does not perform transmission or reception with the serving cell.

In some embodiments, the one time slot that cannot be used for shared inbound channel transmission is a time slot in which the communication device is not active. In some embodiments, the one time slot that cannot be used for shared inbound channel transmission does not have a corresponding available monitoring occasion for controlling inbound channel transmission.

In some embodiments, the method 1000 further comprises: determining that a shared inbound channel is received on a first time slot in a first codebook window, wherein an indication is provided to indicate that HARQ-ACKs for the shared inbound channel are on one or more sub-slots; and setting an HARQ-ACK information bit corresponding to the first slot in an HARQ-ACK codebook according to a decoding result of the shared inbound channel in response to the determination, wherein the HARQ-ACK information bit is set to be Acknowledgement (ACK) in response to the decoding result of the shared inbound channel being successful, and the HARQ-ACK information bit is set to be non-acknowledgement (NACK) in response to the decoding result of the shared inbound channel being failed. In some embodiments, the method 1000 further comprises: determining that the shared inbound channel is not received on the second time slot in the first codebook window or is received on the second time slot in the first codebook window, wherein an indication is provided to indicate that the HARQ-ACK for the shared inbound channel is not to be included in any of the one or more sub-slots; and in response to the determination, setting a HARQ-ACK information bit in the HARQ-ACK codebook corresponding to the first slot to a non-acknowledgement (NACK).

In some embodiments, the communication device determines the locations of the plurality of time slots included in the first codebook window based on the following condition: (1) One or more locations of one or more sub-slots for which a HARQ-ACK codebook is generated, and (2) a set of time interval values indicating a time difference between any of the one or more sub-slots for which the HARQ-ACK codebook is generated and one of the plurality of slots. In some embodiments, the first codebook window is determined by combining one or more codebook windows corresponding to one or more sub-slots for which HARQ-ACKs are generated. In some embodiments, one of the one or more codebook windows comprises a plurality of slots based on the following conditions: (1) A position of a sub-slot corresponding to a codebook window, and (2) a set of time interval values indicating a time difference between any of the plurality of slots and the sub-slot. In some embodiments, the shared outbound channel comprises a Physical Uplink Shared Channel (PUSCH). In some embodiments, the control outbound channel comprises a Physical Uplink Control Channel (PUCCH). In some embodiments, the shared inbound channel comprises a Physical Downlink Shared Channel (PDSCH). In some embodiments, the control inbound channel comprises a Physical Downlink Control Channel (PDCCH).

Fig. 11 illustrates an exemplary flow chart of a method 1100 for HARQ-ACK codebook processing techniques. Operation 1102 comprises: the first determination is performed by a network device (e.g., a base station): the transmission resources for sharing the outbound channel span a plurality of sub-slots within a slot that includes the plurality of sub-slots that are used to control the outbound channel. Operations 1104 include: a shared outbound channel with a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook for one or more of the plurality of sub-slots is received by the network device in response to the first determination, the HARQ-ACK codebook configured to indicate whether the communication device received a transmission in one or more slots preceding the plurality of sub-slots in time.

In some embodiments, the shared outbound channel is scheduled by control information that does not include a Downlink Allocation Index (DAI) configured to indicate whether to generate the HARQ-ACK codebook for the plurality of sub-slots. In some embodiments, the shared outbound channel is associated with a lack of control information that schedules the shared outbound channel. In some embodiments, the method 1100 further comprises: transmitting the shared inbound channel to the communication device; and receiving, by the network device, the shared outbound channel with the HARQ-ACK codebook in response to transmitting the shared inbound channel. In some embodiments, a network device transmits control information scheduling a shared outbound channel, the control information including a Downlink Allocation Index (DAI) configured to indicate whether to generate a HARQ-ACK codebook for the plurality of sub-slots.

In some embodiments, the DAI comprises a plurality of subfields, each subfield corresponding to one of the plurality of subfields, each subfield configured to indicate whether HARQ-ACK information bits are generated for a sub-slot corresponding to the subfield, the HARQ-ACK codebook comprising HARQ-ACK information. In some embodiments, the number of subfields is equal to the number of sub-slots of a slot. In some embodiments, the number of the plurality of subfields is equal to a maximum number of the plurality of subfields allowed to overlap with the shared outbound channel. In some embodiments, the shared outbound channel comprises a Physical Uplink Shared Channel (PUSCH). In some embodiments, the control outbound channel comprises a Physical Uplink Control Channel (PUCCH). In some embodiments, the shared inbound channel comprises a Physical Downlink Shared Channel (PDSCH).

The following sections introduce several exemplary approaches described in this patent document:

● In case that the PUSCH spans a plurality of sub slots of the PUCCH, or the PUSCH spans a sub slot of the PUCCH configured with physical priority,

if the PUSCH is the configured grant PUSCH, if the UE detects a PDCCH scheduling the PDSCH and the HARQ-ACK feedback is transmitted on one of the plurality of sub-slots, a HARQ-ACK codebook is generated for the plurality of sub-slots or for each slot transmitting the HARQ-ACK feedback based on the indication.

The DAI in DCI scheduling PUSCH indicates whether HARQ-ACK codebooks for a plurality of sub-slots are generated, wherein the HARQ-ACK codebooks are finally multiplexed in PUSCH.

■ The DAI in the DCI includes a plurality of DAI subfields, wherein each subfield corresponds to one of the plurality of subfields, and the subfields indicate whether a HARQ-ACK codebook for the corresponding subfield is generated.

■ According to PUSCH scheduling, the number of DAI subfields is the number of sub-slots of a slot, or the maximum number of sub-slots that can overlap with PUSCH.

The HARQ-ACK codebook for one or more sub-slots is generated according to the following method.

■ One or more sub-slots are formed into a sub-slot group. For a sub-slot group for which the HARQ-ACK codebook is generated, a codebook window is determined.

■ For each sub-slot, each codebook window is determined and combined to form a final codebook window for HARQ-ACK codebook generation.

The term "exemplary" is used herein to mean "exemplary," which 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 including computer-executable instructions (e.g., program code) executed by computers in network environments, embodied in computer-readable media. The computer readable medium may include removable and non-removable storage devices including, but not limited to, read Only Memory (ROM), random access memory (random access memory, RAM), compact Disc (CD), digital versatile disc (digital versatile disc, 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-executable instructions 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 of the 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. Alternatively, or in addition, the disclosed components or modules may be implemented as application specific integrated circuits (application specific integrated circuit, ASIC) and/or field programmable gate array (field programmable gate array, FPGA) devices. Some embodiments may additionally or alternatively include a digital signal processor (digital signal processor, DSP) that is a special purpose microprocessor having an architecture optimized for the operational requirements of digital signal processing associated with the functions of the present disclosure. Similarly, the various components or sub-components within each module may be implemented by software, hardware, or firmware. Connectivity between modules and/or components within modules may be provided using any connectivity methods and mediums known in the art, including but not limited to communication over the internet, wired networks, or wireless networks using appropriate protocols.

While this document contains many specifics, these should not be construed as limitations on the scope of what may be claimed, but rather as descriptions of particular embodiments of the subject matter. Certain features that are described in this document 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 combination of claimed subject matter can in some cases be excised from the combination, and the combination of the claimed subject matter 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.

Only a few embodiments and examples are described, and other embodiments, modifications, and variations are possible based on what is described and illustrated in the present disclosure.

Claims

1. A method of wireless communication, comprising:

performing, by the communication device, a first determination: transmission resources for sharing an outbound channel span a plurality of sub-slots within a time slot comprising the plurality of sub-slots, the plurality of sub-slots configured for controlling the outbound channel;

performing, by the communication device, a second determination: whether to generate a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook for one or more of the plurality of sub-slots; and

transmitting, by the communication device, the shared outbound channel with the HARQ-ACK codebook in response to the first determination and the second determination;

wherein the HARQ-ACK codebook is configured to indicate whether the communication device received a transmission in one or more time slots temporally preceding the plurality of sub-slots.

2. The method of claim 1, further comprising:

transmitting, by the communication device, the shared outbound channel without the HARQ-ACK codebook in response to the first determination and the second determination.

3. The method of claim 1, wherein the shared outbound channel is scheduled by control information that does not include a Downlink Allocation Index (DAI) configured to indicate whether to generate the HARQ-ACK codebook for the plurality of sub-slots.

4. The method of claim 1, wherein the shared outbound channel is associated with a lack of control information that schedules the shared outbound channel.

5. The method of any of claims 3 to 4, further comprising:

receiving, by the communication device, a shared inbound channel;

performing a third determination: a sub-slot carrying the HARQ-ACK codebook for the shared inbound channel overlaps with the shared outbound channel, wherein the plurality of sub-slots includes the sub-slot;

generating a HARQ-ACK codebook for the plurality of sub-slots or the sub-slot;

transmitting, by the communication device, the shared outbound channel with a HARQ-ACK codebook in response to the third determination and the generating.

6. The method of claim 1, wherein the communication device receives control information that schedules the shared outbound channel, wherein the control information comprises a Downlink Allocation Index (DAI) configured to indicate whether to generate the HARQ-ACK codebook for the plurality of sub-slots.

7. The method according to claim 6, wherein the method comprises,

wherein the DAI comprises a plurality of subfields;

wherein each subfield corresponds to one of the plurality of sub-slots;

Wherein each subfield is configured to indicate whether HARQ-ACK information bits are generated for a sub-slot corresponding to the subfield;

wherein the HARQ-ACK codebook includes the HARQ-ACK information.

8. The method of claim 7, wherein the number of subfields is equal to a number of sub-slots in the time slot.

9. The method of claim 7, wherein the number of the plurality of subfields is equal to a maximum number of a plurality of subfields allowed to overlap with the shared outbound channel.

10. The method of claim 1, wherein the HARQ-ACK codebook for the one or more of the plurality of sub-slots is generated by:

the HARQ-ACK codebook is generated based on a plurality of slots in a first codebook window including the plurality of slots, first in a first order of slot indexes of the plurality of slots, and second in a second order of serving cell indexes.

11. The method of claim 10, wherein one of the plurality of time slots that cannot be used for shared inbound channel transmission is excluded from the first codebook window.

12. The method of claim 11, wherein the one time slot that is unavailable for the shared inbound channel transmission overlaps with a measurement gap in which the communication device does not perform transmission or reception with a serving cell.

13. The method of claim 11, wherein the one time slot that cannot be used for the shared inbound channel transmission is a time slot in which the communication device is not active.

14. The method of claim 11, wherein the one time slot that is unavailable for the shared inbound channel transmission has no monitoring occasion for control inbound channel transmission available.

15. The method of claim 10, further comprising:

determining that a shared inbound channel is received on a first time slot in the first codebook window, wherein an indication is provided to indicate that HARQ-ACKs for the shared inbound channel are located on the one or more sub-time slots; and

setting HARQ-ACK information bits corresponding to the first time slot in the HARQ-ACK codebook according to a decoding result of the shared inbound channel in response to the determining;

wherein the HARQ-ACK information bit is set to an Acknowledgement (ACK) in response to the decoding result of the shared inbound channel being successful;

wherein the HARQ-ACK information bit is set to non-acknowledgement (NACK) in response to the decoding result failure of the shared inbound channel.

16. The method of claim 10, further comprising:

determining that a shared inbound channel is not received on a second time slot in the first codebook window or is received on the second time slot in the first codebook window;

wherein an indication is provided to indicate that HARQ-ACKs for the shared inbound channel are not included in any of the one or more sub-slots; and

in response to the determination, a HARQ-ACK information bit in the HARQ-ACK codebook corresponding to the first slot is set to non-acknowledgement (NACK).

17. The method according to claim 10,

wherein the communication device determines the positions of the plurality of slots included in the first codebook window based on the following condition:

(1) Generating one or more positions of the one or more sub-slots for which the HARQ-ACK codebook is intended, and

(2) A set of time interval values indicating a time difference between any of the one or more sub-slots for which the HARQ-ACK codebook is generated and one of the plurality of slots.

18. The method according to claim 10,

wherein the first codebook window is determined by combining one or more codebook windows;

Wherein the one or more codebook windows correspond to the one or more sub-slots for which the HARQ-ACK is generated.

19. The method according to claim 18,

wherein one of the one or more codebook windows comprises a plurality of slots based on the following conditions:

(1) The position of a sub-slot corresponding to a codebook window; and

(2) A set of time interval values indicating a time difference between any of the plurality of time slots and the sub-slot.

20. The method of any of claims 1-19, wherein the shared outbound channel comprises a Physical Uplink Shared Channel (PUSCH).

21. The method of any of claims 1-19, wherein the control outbound channel comprises a Physical Uplink Control Channel (PUCCH).

22. The method of any of claims 5 and 11-16, wherein the shared inbound channel comprises a Physical Downlink Shared Channel (PDSCH).

23. The method of claim 14, wherein the control inbound channel comprises a Physical Downlink Control Channel (PDCCH).

24. A method of wireless communication, comprising:

Performing, by the network device, a first determination: transmission resources for sharing an outbound channel span a plurality of sub-slots within a time slot comprising the plurality of sub-slots, the plurality of sub-slots configured for controlling the outbound channel; and

receiving, by the network device in response to the first determination, the shared outbound channel with a HARQ-ACK codebook for one or more of the plurality of sub-slots;

wherein the HARQ-ACK codebook is configured to indicate whether a communication device received a transmission in one or more time slots preceding the plurality of sub-slots in time.

25. The method of claim 24, wherein the shared outbound channel is scheduled by control information that does not include a Downlink Allocation Index (DAI) configured to indicate whether to generate the HARQ-ACK codebook for the plurality of sub-slots.

26. The method of claim 24, wherein the shared outbound channel is associated with a lack of control information to schedule the shared outbound channel.

27. The method of any of claims 25 to 26, further comprising:

transmitting a shared inbound channel to the communication device; and

The shared outbound channel with the HARQ-ACK codebook is received by the network device in response to transmitting the shared inbound channel.

28. The method of claim 24, wherein the network device transmits control information that schedules the shared outbound channel, wherein the control information comprises a Downlink Allocation Index (DAI) configured to indicate whether to generate the HARQ-ACK codebook for the plurality of sub-slots.

29. The method according to claim 28,

wherein the DAI comprises a plurality of subfields;

wherein each subfield corresponds to one of the plurality of sub-slots;

wherein each subfield is configured to indicate whether the HARQ-ACK information bit is generated for a sub-slot corresponding to the subfield; and

wherein the HARQ-ACK codebook includes the HARQ-ACK information.

30. The method of claim 29, wherein the number of subfields is equal to a number of sub-slots in the time slot.

31. The method of claim 29, wherein the number of the plurality of subfields is equal to a maximum number of a plurality of subfields allowed to overlap with the shared outbound channel.

32. The method of any of claims 24-31, wherein the shared outbound channel comprises a Physical Uplink Shared Channel (PUSCH).

33. The method of any of claims 24-31, wherein the control outbound channel comprises a Physical Uplink Control Channel (PUCCH).

34. The method of claim 27, wherein the shared inbound channel comprises a Physical Downlink Shared Channel (PDSCH).

35. An apparatus for wireless communication, wherein the apparatus comprises a processor configured to implement the method of one or more of claims 1-34.

36. 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 one or more of claims 1 to 34.