HARQ-ACK codebook determination technique

Abstract

A description is given of a technique for determining a HARQ-ACK codebook. An example wireless communication method includes a communication device receiving control information from a cell including a field including a value, the value indicating a current number of control channel monitoring opportunities associated with the cell and to be monitored by the communication device, the current number of control channel monitoring opportunities being part of a set of numbers associated with a set of control channel monitoring opportunities in which a control channel has been or will be received from the cell, and transmitting one or more hybrid automatic repeat request acknowledgement (HARQ-ACK) information bits indicating that a shared channel associated with the control channel monitoring opportunity has been received by the communication device or that the communication device has received the control information.

Description

[Technical Field]

[0001] TECHNICAL FIELD This disclosure is directed generally to digital wireless communications. [Background technology]

[0002] background Wireless communication technologies are moving the world towards an increasingly connected and networked society. Compared to existing wireless networks, next-generation systems and wireless communication technologies will be required to address the characteristics of a much wider range of use cases and provide a more complex and sophisticated range of access requirements and flexibility.

[0003] Long Term Evolution (LTE) is a wireless communication standard for mobile devices and data terminals developed by the 3rd Generation Partnership Project (3GPP®). LTE Advanced (LTE-A) is an enhancement to the LTE standard. The fifth-generation wireless system, known as 5G, evolves from the LTE and LTE-A wireless standards to address higher data rates, more connections, ultra-low latency, high reliability, and other emerging business needs. Summary of the Invention [Means for solving the problem]

[0004] overview Techniques for transmitting and receiving HARQ-ACK information bits are disclosed.

[0005] An exemplary wireless communication method includes receiving, by a communication device, control information from a cell, the control information including a field containing a value, the value indicating a current number of control channel monitoring opportunities associated with the cell and to be monitored by the communication device, the current number of control channel monitoring opportunities being part of a series of numbers associated with a set of control channel monitoring opportunities in which a control channel has been or will be received from the cell; and transmitting one or more hybrid automatic repeat request-acknowledgement (HARQ-ACK) information bits indicating that a shared channel associated with the control channel monitoring opportunity has been received by the communication device or that the communication device has received the control information.

[0006] In one embodiment, the value of the field indicates the current number of control channel monitoring opportunities associated with a cell, where the cell is a scheduling cell for one scheduled cell in a group of scheduled cells. In one embodiment, the value of the field indicates the current number of control channel monitoring opportunities associated with a cell and one or more other cells, where the cell is a scheduling cell for a group of scheduled cells that includes the cell and one or more other cells. In one embodiment, the field is based on or indicates a control channel monitoring opportunity index of a control channel monitoring opportunity, or a shared channel reception start time of a shared channel and a control channel monitoring opportunity index of a control channel monitoring opportunity, or a shared channel reception start time, a serving cell index, and a control channel monitoring opportunity index of a control channel monitoring opportunity. In an embodiment, the method further includes receiving second control information including a second field having a second value indicating a total number of control channel monitoring opportunities in a set of control channel monitoring opportunities associated with the cell, and transmitting one or more HARQ-ACK information bits includes obtaining multiplexed HARQ-ACK information bits by multiplexing a plurality of HARQ-ACK information bits indicating whether a set of shared channels has been received by the communication device and / or that the communication device has received the control information, wherein the plurality of HARQ-ACK information bits include one or more HARQ-ACK information bits; and transmitting the multiplexed HARQ-ACK information bits on an uplink shared channel scheduled by the control channel including the second field.

[0007] In an embodiment, the second value of the second field indicates a total number of control channel monitoring opportunities in a set of control channel monitoring opportunities associated with the cell that is the reference cell, and the communications device determines one or more second values ​​associated with the one or more other cells based on the second value of the second field, each of the one or more second values ​​indicating a total number of control channel monitoring opportunities in one set of control channel monitoring opportunities associated with one of the one or more other cells. In an embodiment, the second field of the second value is a total downlink allocation indicator (T-DAI) field of the cell, and the communications device determines a third value of the second T-DAI field based on the second value of the T-DAI field, the third value of the second T-DAI field indicating a second total number of control channel monitoring opportunities in a second set of control channel monitoring opportunities associated with the second cell and to be monitored by the communications device, the second value being referred to as Y and the third value being referred to as X. In one embodiment, X is equal to the largest number (X1) in a series of numbers associated with a set of control channel monitoring opportunities where a control channel has been or will be received from the cell.

[0008] In an embodiment, X1 is a maximum value in a series of numbers associated with a set of control channel monitoring opportunities in which a control channel has been or will be received from the cell, and in response to X being greater than X1, the communications device transmits a negative acknowledgement (NACK) value of the HARQ-ACK information bit corresponding to the last X-X1 Counter Downlink Assignment Indicator (C-DAI) value in the HARQ-ACK codebook for at least a portion of a second set of control channel monitoring opportunities. In an embodiment, X=p*Y, where p is a scaling factor and p is an integer greater than 0. In an embodiment, [ka] where p is a scaling factor, p is an integer or a decimal, and p is greater than 0. In an embodiment, p is determined by the subcarrier spacing, the numerology corresponding to the subcarrier spacing, the total number of control channel monitoring opportunities, or the physical downlink control channel (PDCCH) monitoring capability, or p is configured by the base station.

[0009] In one embodiment, X=Y+q, where q is an integer, and q is determined by the subcarrier spacing, the numerology corresponding to the subcarrier spacing, the total number of control channel monitoring opportunities, or the PDCCH monitoring capability, or q is configured by the base station. In one embodiment, (X-1) mod T+1=(Y-1) mod T+1, where T and N are integers. In one embodiment, T is 2 N where X, Y, and N are integers greater than 0. In one embodiment, X is greater than or equal to the total number of control channel monitoring opportunities in the set of control channel monitoring opportunities at which a control channel was received. In one embodiment, the cell is a reference cell, and the communications device determines not to generate or transmit feedback to the second cell in response to the second value of the T-DAI field being greater than zero and the communications device determining that one or more control channels have not been received from the second cell. In one embodiment, the cell is a reference cell, and the communications device generates and transmits one bit of negative acknowledgment (NACK) information to the second cell in response to the second value of the T-DAI field being greater than M, where M is an integer greater than zero, and the communications device determining that one or more control channels have not been received from the second cell.

[0010] In one embodiment, the cell is a reference cell, and in response to determining that one or more control channels from the cell are not received, the communications device determines not to generate or transmit feedback to the cell, and the communications device generates and transmits feedback to the second cell based on a value indicating a second current number of second control channel monitoring opportunities associated with the second cell. In one embodiment, the cell is a reference cell, and the method further includes receiving second control information including a second field having a second value indicating a total number of control channel monitoring opportunities in a set of control channel monitoring opportunities associated with the cell, and in response to the second value being equal to zero, the communications device determines not to generate or transmit feedback to the cell, and the communications device generates and transmits feedback to the second cell based on a value indicating a second current number of second control channel monitoring opportunities associated with the second cell. In one embodiment, the field includes a counter-downlink assignment indicator (C-DAI) field. In one embodiment, the control information includes downlink control information (DCI).

[0011] Another example wireless communication method includes transmitting, by a network device, control information including a field containing a value, the value indicating a current number of control channel monitoring opportunities associated with a cell of the network device and to be monitored by the communication device, the current number of control channel monitoring opportunities being part of a series of numbers associated with a set of control channel monitoring opportunities in which a control channel has been or will be transmitted from the cell to the communication device; and receiving one or more hybrid automatic repeat request-acknowledgement (HARQ-ACK) information bits indicating whether a shared channel associated with the control channel monitoring opportunity has been received by the communication device or that the communication device has received the control information.

[0012] In one embodiment, the value of the field indicates the current number of control channel monitoring opportunities associated with a cell, where the cell is a scheduling cell for one scheduled cell in a group of scheduled cells. In one embodiment, the value of the field indicates the current number of control channel monitoring opportunities associated with a cell and one or more other cells, where the cell is a scheduling cell for a group of scheduled cells that includes the cell and one or more other cells. In one embodiment, the field is based on or indicates a control channel monitoring opportunity index of a control channel monitoring opportunity, or a shared channel reception start time of a shared channel and a control channel monitoring opportunity index of a control channel monitoring opportunity, or a shared channel reception start time, a serving cell index, and a control channel monitoring opportunity index of a control channel monitoring opportunity. In an embodiment, the method further includes transmitting second control information including a second field including a second value indicating a total number of control channel monitoring opportunities in a set of control channel monitoring opportunities associated with the cell, and receiving one or more HARQ-ACK information bits includes receiving multiplexed HARQ-ACK information bits in an uplink shared channel scheduled by the control channel including the second field, wherein the multiplexed HARQ-ACK information bits include a plurality of HARQ-ACK information bits and one or more HARQ-ACK information bits indicating whether the set of shared channels has been received by the communication device and / or that the communication device has received control information.

[0013] In one embodiment, the second value of the second field indicates a total number of control channel monitoring opportunities in a set of control channel monitoring opportunities associated with the cell that is the reference cell. In one embodiment, the second field of the second value is a cell Total Downlink Allocation Indicator (T-DAI) field. In one embodiment, the field includes a Counter Downlink Allocation Indicator (C-DAI) field. In one embodiment, the control information includes Downlink Control Information (DCI).

[0014] In yet another exemplary aspect, the methods described above are embodied in the form of processor-executable code and stored on a non-transitory computer-readable storage medium, the code contained on the computer-readable storage medium, when executed by a processor, causing the processor to perform the methods described in this patent document.

[0015] In yet another exemplary embodiment, a device configured or operable to perform the above-described method is disclosed.

[0016] These and other aspects and implementations thereof are described in more detail in the drawings, description, and claims. The present invention provides, for example, the following. (Item 1) 1. A wireless communication method, comprising: receiving, by a communication device, control information from a cell, the control information including a field containing a value; the value indicates a current number of control channel monitoring opportunities associated with the cell and to be monitored by the communication device; the current number of control channel monitoring opportunities is part of a series of numbers associated with the set of control channel monitoring opportunities in which a control channel has been or will be received from the cell; and transmitting one or more hybrid automatic repeat request-acknowledgement (HARQ-ACK) information bits indicating whether a shared channel associated with the control channel monitoring opportunity has been received by the communication device or indicating that the communication device has received the control information; A method comprising: (Item 2) the value in the field indicates the current number of control channel monitoring opportunities associated with the cell; the cell is a scheduling cell for one scheduled cell in a group of scheduled cells; The method according to item 1. (Item 3) the value in the field indicates the current number of control channel monitoring opportunities associated with the cell and one or more other cells; the cell is a scheduling cell for a group of scheduled cells that includes the cell and the one or more other cells; The method according to item 1. (Item 4) The field is a control channel monitoring opportunity index of the control channel monitoring opportunity; or a shared channel reception start time of the shared channel and a control channel monitoring opportunity index of the control channel monitoring opportunity; or the shared channel reception start time, the index of a serving cell, and the control channel monitoring opportunity index of the control channel monitoring opportunity; Item 1. The method according to item 1, which is based on or shows the same. (Item 5) receiving second control information including a second field including a second value indicating a total number of control channel monitoring opportunities in the set of control channel monitoring opportunities associated with the cell; further comprising transmitting the one or more HARQ-ACK information bits Obtaining multiplexed HARQ-ACK information bits by multiplexing a plurality of HARQ-ACK information bits, the multiplexed HARQ-ACK information bits indicating whether a set of shared channels has been received by the communication device and / or whether the communication device has received the control information, wherein the plurality of HARQ-ACK information bits includes the one or more HARQ-ACK information bits; transmitting the multiplexed HARQ-ACK information bits scheduled by the control channel including the second field in an uplink shared channel; The method according to item 1, comprising: (Item 6) the second value of the second field indicates a total number of the control channel monitoring opportunities in the set of control channel monitoring opportunities associated with the cell that is a reference cell; the communications device determines one or more second values ​​associated with one or more other cells based on the second value in the second field; each of the one or more second values ​​indicating a total number of control channel monitoring opportunities in one set of control channel monitoring opportunities associated with one of the one or more other cells; The method according to item 5. (Item 7) the second field for the second value is a Total Downlink Allocation Indicator (T-DAI) field for the cell; the communications device determines a third value of a second T-DAI field based on the second value of the T-DAI field; the third value of the second T-DAI field indicates a second total number of control channel monitoring opportunities in a second set of control channel monitoring opportunities associated with a second cell and to be monitored by the communications device; The second value is referred to as Y and the third value is referred to as X. The method according to item 5. (Item 8) 8. The method of claim 7, wherein X is equal to the largest value (X1) of the series of numbers associated with the set of control channel monitoring opportunities in which a control channel has been or will be received from the cell. (Item 9) X1 is the largest number in the series of numbers associated with the set of control channel monitoring opportunities in which a control channel has been or will be received from the cell; In response to X being greater than X1, the communications device transmits, for at least some of the second set of control channel monitoring opportunities, a negative acknowledgement (NACK) value for a HARQ-ACK information bit corresponding to a last X-X1 Counter Downlink Assignment Indicator (C-DAI) value in a HARQ-ACK codebook. The method according to item 7. (Item 10) X=p*Y, p is a scaling factor, p is an integer greater than 0, The method according to item 7. (Item 11)

number

[0017] [Figure 1] FIG. 1 is an example of the use of the Counter Downlink Allocation Indicator (C-DAI) for self-carrier scheduling.

[0018] [Figure 2] FIG. 2 shows an example of the use of C-DAI for cross-carrier scheduling. [Figure 3] FIG. 3 shows an example of the use of C-DAI for cross-carrier scheduling.

[0019] [Figure 4] FIG. 4 shows an example of the use of the Total Downlink Allocation Indicator (T-DAI) for a reference cell. [Figure 5] FIG. 5 shows an example of the use of the Total Downlink Allocation Indicator (T-DAI) for a reference cell.

[0020] [Figure 6] FIG. 6 illustrates an example of a wireless communication system including a base station (BS) and user equipment (UE) according to some implementations of the disclosed technology.

[0021] [Figure 7]FIG. 7 shows an example block diagram of a hardware platform that may be part of a network or communication device.

[0022] [Figure 8] FIG. 8 shows an exemplary flowchart for transmitting HARQ-ACK information bits.

[0023] [Figure 9] FIG. 9 shows an example flowchart for receiving HARQ-ACK information bits. DETAILED DESCRIPTION OF THE INVENTION

[0024] Detailed Description In existing 5G specifications, two different methods for determining a hybrid automatic repeat request-acknowledgement (HARQ-ACK) codebook are commonly used. The first method is to determine the HARQ-ACK codebook based on a semi-static configuration, such as a time division duplexing (TDD) configuration and a time domain resource allocation (TDRA) configuration. The second method is to determine the HARQ-ACK codebook based on downlink allocation index (DAI) values ​​across different cells. The first method may result in large overhead in scenarios such as when a UE is configured with multiple cells. The second method may require close (or strict) and frequent coordination between different cells because DAI values ​​may be set across different cells. To address at least these technical challenges with existing technologies, this patent document describes a HARQ-ACK codebook determination method that can reduce overhead and, in some embodiments, does not require frequent and strict coordination between different cells.

[0025] The following examples of the headings of various sections are used to facilitate understanding of the disclosed subject matter and are not intended to limit the scope of the claimed subject matter in any way. Accordingly, one or more features of one example section may be combined with one or more features of another example section. Furthermore, although 5G terminology is used for clarity of description, the technology disclosed herein is not limited to 5G technology alone and may also be used in wireless systems implementing other protocols.

[0026] I. Embodiment 1: Overview

[0027] The UE may receive a value of a Counter Downlink Allocation Indicator (C-DAI) field of the DCI, which indicates the cumulative number of PDCCH monitoring opportunities up to the current PDCCH monitoring opportunity for a cell. In an embodiment, the time slot associated with the PDCCH monitoring opportunity may include a PDSCH reception associated with the DCI. In an embodiment, the time slot associated with the PDCCH monitoring opportunity may be different from the time slot including the PDSCH reception associated with the DCI. The HARQ-ACK information bit is transmitted by the UE (e.g., in situations where the PDCCH may not schedule a PDSCH) to indicate whether the UE received a PDSCH in the time slot associated with the PDCCH monitoring opportunity or to indicate whether the UE received a DCI carried by the PDCCH. In this patent document, the term "cumulative number" may refer to the current value of the counter.

[0028] In an embodiment, a PDSCH reception associated with a DCI may refer to a PDSCH reception received by a UE that is scheduled for the DCI.

[0029] In an embodiment, the HARQ-ACK information bit associated with a DCI may refer to a HARQ-ACK information bit that is not a response to a PDSCH reception, such as a DCI indicating an SPS PDSCH release, a DCI indicating an SCell dormant state, etc.

[0030] In the case of self-carrier scheduling, the base station transmits DCI within a cell, and the UE monitors DCI within the same cell, and the PDSCH reception or HARQ-ACK information bit is also for this cell.

[0031] In the case of cross-carrier scheduling, the PDCCH and the corresponding scheduled PDSCH are on different cells. Therefore, there may be at least two options for self-carrier scheduling and cross-carrier scheduling.

[0032] Option 1: The value of the C-DAI field of the DCI indicates the cumulative number of PDCCH monitoring opportunities up to the current PDCCH monitoring opportunity for one scheduled cell. In an embodiment, the time slot associated with the PDCCH monitoring opportunity may include a PDSCH reception associated with the DCI. In an embodiment, the time slot associated with the PDCCH monitoring opportunity may be different from the time slot including a PDSCH reception associated with the DCI. The HARQ-ACK information bit is transmitted by the UE (e.g., in situations where the PDCCH may not schedule a PDSCH) to indicate whether the UE received a PDSCH in a time slot associated with the PDCCH monitoring opportunity or to indicate whether the UE received a DCI carried by the PDCCH.

[0033] Option 2: The value of the C-DAI field of the DCI indicates the cumulative number of PDCCH monitoring opportunities up to the current PDCCH monitoring opportunity of the scheduling cell for the group of scheduled cells. In an embodiment, the time slot associated with the PDCCH monitoring opportunity may include a PDSCH reception associated with the DCI. In an embodiment, the time slot associated with the PDCCH monitoring opportunity may be different from the time slot including the PDSCH reception associated with the DCI. The HARQ-ACK information bit is transmitted by the UE (e.g., in situations where the PDCCH may not schedule a PDSCH) to indicate whether the UE received a PDSCH in the time slot associated with the PDCCH monitoring opportunity or to indicate whether the UE received a DCI carried by the PDCCH.

[0034] The values ​​of the C-DAI field of the DCI are ordered based on one of the following options:

[0035] Option 1: PDCCH Monitoring Opportunity Index

[0036] For example, the values ​​of the C-DAI field of the DCI are arranged in ascending order of PDCCH monitoring opportunity index.

[0037] Option 2: PDSCH reception start time and PDCCH monitoring opportunity index

[0038] For example, the values ​​of the C-DAI field of the DCI are first arranged in order of increasing PDSCH reception start times for PDSCH receptions scheduled from the same PDCCH monitoring occasion, and then arranged in order of increasing PDCCH monitoring occasion index.

[0039] Option 3: PDSCH reception start time, serving cell index, PDCCH monitoring opportunity index

[0040] For example, the values ​​of the C-DAI field of the DCI are first arranged in order of increasing PDSCH reception start time for PDSCH reception in the same serving cell scheduled from the same PDCCH monitoring opportunity, then arranged in order of ascending serving cell index, and further arranged in order of ascending PDCCH monitoring opportunity index.

[0041] Figure 1 shows an example of C-DAI in the case of self-carrier scheduling. In self-carrier scheduling, PDCCH and PDSCH are transmitted in the same cell. C-DAI values ​​are tallied separately for each cell. The PDCCH corresponding to C-DAI=2 in cell 2 may refer to the PDCCH carrying DCI indicating SPS PDSCH release.

[0042] Figure 2 is an example of C-DAI in the case of cross-carrier scheduling (e.g., first option 1 in Section 1 of this patent document). In cross-carrier scheduling, the PDCCH and PDSCH can be transmitted in different cells. In Figure 2, cell 0 schedules the PDSCH for itself and schedules the PDSCH for cell 1. Cell 2 is self-scheduling. In this case, the C-DAI values ​​are aggregated separately for each scheduled cell.

[0043] Figure 3 is another example of C-DAI for cross-carrier scheduling (e.g., first option 2 in Section 1 of this patent document). In Figure 3, cell 0 schedules a PDSCH for itself and a PDSCH for cell 1. Cell 2 is self-scheduling. In this case, the PDCCH for cell 0 and the PDCCH for cell 1 are both transmitted on cell 0, so the C-DAI is aggregated for each scheduling cell for all scheduled cells (i.e., cell 0 and cell 1).

[0044] In one embodiment, Table 1 (shown below) shows an example of the relationship between PDCCH monitoring occasions (indicated by PDCCH monitoring index), received PDCCH, C-DAI values, and DCI fields. [Table 1]

[0045] II. Embodiment 2: Method 1: T-DAI

[0046] The UE generates HARQ-ACK feedback based on the C-DAI value. Taking FIG. 1 as an example, the UE generates HARQ-ACK feedback for the four PDSCHs of cell 0. If the PDCCH corresponding to C-DAI=2 is missed by the UE, the UE can detect or determine this because the C-DAI values ​​of the received PDCCH are not consecutive. However, if the PDCCH corresponding to C-DAI=4 in this example is missed by the UE, the UE cannot detect or determine this because the C-DAI values ​​of the received PDCCH are still consecutive. To overcome this, a total DAI (T-DAI) value can be incorporated. In one embodiment, the C-DAI can schedule the DL PDSCH in a DCI format, while the T-DAI can schedule the UL PUSCH in a DCI format. In one embodiment, both the C-DAI and the T-DAI can schedule the DL PDSCH in a DCI format.

[0047] T-DAI can be defined as one of the following:

[0048] Option 1: The value of T-DAI in the DCI indicates, for each scheduling cell, the total number of PDCCH monitoring opportunities up to the current PDCCH monitoring opportunity, the time slot associated with the PDCCH monitoring opportunity can include a PDSCH reception associated with the DCI, and the HARQ-ACK information bit is transmitted by the UE to indicate whether the UE received a PDSCH in the time slot associated with the PDCCH monitoring opportunity (e.g., in a situation where the PDCCH may not schedule a PDSCH) or to indicate whether the UE received the DCI carried by the PDCCH. For example, if the UE is configured for three cells, the DCI includes three T-DAI fields, each indicating a T-DAI value for each cell.

[0049] Option 2: The T-DAI value of the DCI indicates the total number of PDCCH monitoring opportunities up to the current PDCCH monitoring opportunity for each scheduled cell. In an embodiment, the time slot associated with the PDCCH monitoring opportunity may include a PDSCH reception associated with the DCI. In an embodiment, the time slot associated with the PDCCH monitoring opportunity may be different from the time slot including the PDSCH reception associated with the DCI. The HARQ-ACK information bit is transmitted by the UE (e.g., in situations where the PDCCH may not schedule a PDSCH) to indicate whether the UE received a PDSCH in the time slot associated with the PDCCH monitoring opportunity or to indicate whether the UE received a DCI carried by the PDCCH.

[0050] Option 3: The T-DAI value of the DCI indicates the total number of PDCCH monitoring opportunities up to the current PDCCH monitoring opportunity for the cell group(s). In an embodiment, the time slot associated with the PDCCH monitoring opportunity may include a PDSCH reception associated with the DCI. In an embodiment, the time slot associated with the PDCCH monitoring opportunity may be different from the time slot including the PDSCH reception associated with the DCI. The HARQ-ACK information bit is transmitted by the UE (e.g., in a situation where the PDCCH may not schedule a PDSCH) to indicate whether the UE received a PDSCH in the time slot associated with the PDCCH monitoring opportunity or to indicate whether the UE received a DCI carried by the PDCCH. A base station may configure one or more cells in a group. Taking FIG. 3 as an example, if cell 0 and cell 1 are configured as one group and cell 2 is configured as another group, the DCI includes two T-DAI fields. Each T-DAI field indicates one value of T-DAI for each group.

[0051] T-DAI can also be defined as any of the following:

[0052] Option 4: The T-DAI value indicates the total number of PDCCH monitoring opportunities for a cell, and the HARQ-ACK feedback for these PDCCH monitoring opportunities is multiplexed onto the PUSCH scheduled by the DCI carrying the T-DAI. In an embodiment, the time slot associated with the PDCCH monitoring opportunity may include a PDSCH reception associated with the DCI. In an embodiment, the time slot associated with the PDCCH monitoring opportunity may be different from the time slot including the PDSCH reception associated with the DCI. The HARQ-ACK information bit is transmitted by the UE to indicate whether the UE received a PDSCH in a time slot associated with the PDCCH monitoring opportunity or to indicate whether the UE received a DCI carried by the PDCCH (e.g., in situations where the PDCCH may not schedule a PDSCH).

[0053] Taking Figure 1 as an example, if all HARQ-ACK feedbacks for four PDCCH monitoring opportunities in cell 0, two PDCCH monitoring opportunities in cell 1, and three PDCCH monitoring opportunities in cell 2 are to be multiplexed into one PUSCH scheduled by the DCI, the DCI indicates three T-DAI values ​​(i.e., one value each for cell 0, cell 1, and cell 2). The T-DAI values ​​for cell 0, cell 1, and cell 2 indicate 4, 2, and 3, respectively.

[0054] Option 5: The value of T-DAI indicates the total number of PDCCH monitoring opportunities for a group(s) of cells, and the HARQ-ACK feedback for these PDCCH monitoring opportunities will be multiplexed on the PUSCH scheduled by the DCI carrying the T-DAI. In an embodiment, the time slot associated with the PDCCH monitoring opportunity may include a PDSCH reception associated with the DCI. In an embodiment, the time slot associated with the PDCCH monitoring opportunity may be different from the time slot including a PDSCH reception associated with the DCI. The HARQ-ACK information bit is transmitted by the UE (e.g., in situations where the PDCCH may not schedule a PDSCH) to indicate whether the UE received a PDSCH in the time slot associated with the PDCCH monitoring opportunity or to indicate whether the UE received a DCI carried by the PDCCH. A base station can configure one or more cells in a group. Typically, when cross-carrier scheduling is configured, all cells scheduled by the same scheduling cell are included in one group.

[0055] Taking Figure 3 as an example, if all HARQ-ACK feedbacks for four PDCCH monitoring opportunities in cell 0, two PDCCH monitoring opportunities in cell 1, and three PDCCH monitoring opportunities in cell 2 are to be multiplexed into one PUSCH scheduled by the DCI, the DCI indicates two T-DAI values, one for the first group and one for the second group. The first group includes cell 0 and cell 1, and the second group includes cell 2. The T-DAI of the first group is 6, and the T-DAI of the second group is 2.

[0056] III. Embodiment 3: Method 2: T-DAI of Reference Cell

[0057] The T-DAI value indicates the total number of PDCCH monitoring opportunities for a cell, and the HARQ-ACK feedback for these PDCCH monitoring opportunities will be multiplexed on the PUSCH scheduled by the DCI carrying the T-DAI. In an embodiment, the time slot associated with the PDCCH monitoring opportunity may include a PDSCH reception associated with the DCI. In an embodiment, the time slot associated with the PDCCH monitoring opportunity may be different from the time slot including the PDSCH reception associated with the DCI. The HARQ-ACK information bit is transmitted by the UE to indicate whether the UE received a PDSCH in a time slot associated with a PDCCH monitoring opportunity or to indicate whether the UE received a DCI carried by the PDCCH (e.g., in situations where the PDCCH may not schedule a PDSCH).

[0058] In an embodiment, the DCI may indicate the T-DAI of the reference cell to the UE, and the UE may determine one or more T-DAI values ​​for one or more other cells based on the T-DAI for the reference cell. If the value of T-DAI for the reference cell is Y, the value of T-DAI for the other cell (denoted as X) may be determined (e.g., by the UE) in one of the following ways: HARQ-ACK feedback for X PDCCH monitoring opportunities for the other cell may also be multiplexed on the PUSCH. Y is an integer greater than 0.

[0059] The reference cell may be a PCell, a PSCell, a PUCCH-SCell, a scheduling cell, or a cell configured by a base station. For example, the DCI indicates the T-DAI value of the PCell, and the UE determines the T-DAI value of the SCell based on the T-DAI value of the PCell.

[0060] In an embodiment, X is equal to the largest C-DAI value (denoted as X1) received by the UE for the cell, but if X is greater than X1, the UE reports NACK value(s) for the HARQ-ACK information bits corresponding to the last X-X1 C-DAI value in the HARQ-ACK codebook.

[0061] Option 1: X=p*Y, where p is a scaling factor and p is an integer greater than 0.

[0062] The scaling factor may be determined by the subcarrier spacing, the numerology corresponding to the subcarrier spacing, the number of PDCCH monitoring opportunities, or the PDCCH monitoring capability. The scaling factor may also be configured by the base station.

[0063] If the numerology corresponding to the subcarrier spacing of the reference cell is u0 and the numerology corresponding to the subcarrier spacing of another cell is u1, p=2 u1-u0 This becomes:

[0064] Taking Figure 4 as an example, cell 0 is the reference cell, and the T-DAI of the reference cell is 2, i.e., Y=2. The scaling factor for cell 1 is 1, and the scaling factor for cell 2 is 2. Therefore, the T-DAIs of cell 1 and cell 2 are 2 and 4, respectively. Because the UE receives only three DCIs in cell 2, the UE reports NACK value(s) for feedback corresponding to C-DAI=4. In this example, HARQ-ACK feedback corresponding to all C-DAI values ​​in these cells are multiplexed on the same PUCCH.

[0065] Option 2: [ka] where p is a scaling factor, p may be an integer or a decimal, and p is greater than 0.

[0066] The scaling factor may be determined by the subcarrier spacing, the numerology corresponding to the subcarrier spacing, the number of PDCCH monitoring opportunities, or the PDCCH monitoring capability. The scaling factor may also be configured by the base station.

[0067] If the numerology corresponding to the subcarrier spacing of the reference cell is u0 and the numerology corresponding to the subcarrier spacing of another cell is u1, p=2 u1-u0 This becomes:

[0068] Option 3: X = Y + q, where q is an integer, and q is determined by the subcarrier spacing, the numerology corresponding to the subcarrier spacing, the number of PDCCH monitoring opportunities configured by the base station, or the PDCCH monitoring capability. Additionally, q can also be configured by the base station.

[0069] IV. Embodiment 4: Method 3: T-DAI of Reference Cell

[0070] If the value of T-DAI of the reference cell is Y, the value of T-DAI of another cell (denoted as X) can be determined as follows: (X-1) mod T+1 = (Y-1) mod T+1, where T is an integer. Usually, the number of bits of C-DAI is denoted as N, and T = 2. N Set to.

[0071] X and Y are integers greater than 0. N is an integer greater than 0, typically N=2.

[0072] X is greater than or equal to the total number of PDCCH monitoring opportunities for the cell on which the UE received the PDCCH, and the HARQ-ACK feedback for these PDCCH monitoring opportunities will be multiplexed on the PUSCH scheduled by the DCI carrying the T-DAI. In an embodiment, the time slot associated with the PDCCH monitoring opportunity may include a PDSCH reception associated with the DCI. In an embodiment, the time slot associated with the PDCCH monitoring opportunity may be different from the time slot including the PDSCH reception associated with the DCI. The HARQ-ACK information bit is transmitted by the UE to indicate whether the UE received a PDSCH on the time slot associated with the PDCCH monitoring opportunity or to indicate whether the UE received the DCI carried by the PDCCH (e.g., in situations where the PDCCH may not schedule a PDSCH).

[0073] Taking Figure 4 as an example, N is set to 2, that is, T is set to 4. The base station can indicate Y=2 for the reference cell (i.e., cell 0). (Y-1) mod T+1=(2-1) mod 4+1=2. Then, it can be derived that (X-1) mod 4+1=2. X must be greater than or equal to the total number of PDCCH monitoring opportunities for cell 2, so X can be 6. In an embodiment, a time slot associated with a PDCCH monitoring opportunity may include a PDSCH reception associated with a DCI. In an embodiment, a time slot associated with a PDCCH monitoring opportunity may be different from a time slot that includes a PDSCH reception associated with a DCI. A HARQ-ACK information bit is transmitted by the UE (e.g., in situations where the PDCCH may not schedule a PDSCH) to indicate whether the UE received a PDSCH in a time slot associated with a PDCCH monitoring opportunity or to indicate whether the UE received a DCI carried by the PDCCH. Since the UE only receives PDCCHs corresponding to the three C-DAI values ​​of cell 2, the UE reports NACK value(s) for the HARQ-ACK information bit(s) corresponding to the last three C-DAI values ​​in the HARQ-ACK codebook.

[0074] X is greater than or equal to the total number of PDCCH monitoring opportunities for the group(s) of cells, and the HARQ-ACK feedback for these PDCCH monitoring opportunities will be multiplexed on the PUSCH scheduled by the DCI carrying the T-DAI. In an embodiment, the time slot associated with the PDCCH monitoring opportunity may include a PDSCH reception associated with the DCI. In an embodiment, the time slot associated with the PDCCH monitoring opportunity may be different from the time slot including the PDSCH reception associated with the DCI. The HARQ-ACK information bit is transmitted by the UE to indicate whether the UE received a PDSCH on the time slot associated with the PDCCH monitoring opportunity or to indicate whether the UE received a DCI carried by the PDCCH (e.g., in situations where the PDCCH may not schedule a PDSCH).

[0075] Taking Figure 5 as an example, cell 0 is self-carrier scheduled, and cell 1 cross-carrier scheduled cell 2. Cell 1 and cell 2 are configured as a group for C-DAI aggregation. N is set to 2, i.e., T=4. The base station can indicate Y=2 to the reference cell (i.e., cell 0). (Y-1) mod T+1=(2-1) mod 4+1=2. Then, (X-1) mod 4+1=2 can be derived. X must be equal to or greater than the total number of PDCCH monitoring opportunities where PDSCH reception or HARQ-ACK information bits associated with DCIs of cells 1 and 2 exist on cell 2, so X is 6. Because the UE only receives PDCCHs corresponding to four C-DAI values ​​of cells 1 and 2, the UE reports NACK value(s) for the HARQ-ACK information bit(s) corresponding to the last two C-DAI values ​​in the HARQ-ACK codebook.

[0076] V. Embodiment 5: Fallback Behavior

[0077] To further reduce the feedback overhead, certain fallback behaviors can be defined.

[0078] If the T-DAI value of the reference cell is greater than 0 and the UE does not receive a PDCCH in another cell, the UE will not generate feedback to this other cell, in which case the UE does not need to generate dummy feedback to the other cell, thereby reducing the feedback overhead.

[0079] If the T-DAI value of the reference cell is greater than M and the UE does not receive the PDCCH in another cell, the UE generates 1-bit NACK information to this other cell. M is an integer greater than 0. Usually, M is the same value as T, i.e., M=T=2. N If N is set to 2, then M is 4.

[0080] If the UE does not receive a PDCCH in the reference cell, the UE generates feedback to other cells based on the C-DAI values ​​of the other cells, and does not generate feedback to the reference cell.

[0081] If the value of the T-DAI of the reference cell is 0, the UE generates feedback to other cells based on the C-DAI values ​​of the other cells, and does not generate feedback to the reference cell.

[0082] VI. Embodiment 6: PRI Indication

[0083] The PUCCH resource indicator (PRI) is used to indicate the PUCCH resource for carrying HARQ-ACK feedback for the PDCCH received in the corresponding PDCCH monitoring occasion. Different DCIs can carry different PRI values.

[0084] The PUCCH resource determination is based on the PRI field in the reference DCI that the UE detects among DCIs that indicate the same slot for PUCCH transmission and transmits the corresponding HARQ-ACK information on the PUCCH.

[0085] The reference DCI is determined by one of the following options:

[0086] Option 1: The reference DCI is the last DCI among the DCIs that indicate the same slot for PUCCH transmission in the reference cell.

[0087] Taking Figure 4 as an example, the DCI of cell 0 corresponding to C-DAI=2 is the reference DCI, and the PRI carried by this reference DCI is used to determine the PUCCH resource.

[0088] Option 2: The reference DCI is the last DCI among the DCIs in the cell with the smallest serving cell index that indicates the same slot for PUCCH transmission.

[0089] Option 3: The reference DCI is the last DCI among the DCIs in the cell with the largest serving cell index that indicates the same slot for PUCCH transmission.

[0090] Option 4: For the last DCI among the DCIs indicating the same slot for PUCCH transmission in each cell, the reference DCI is the last DCI in each cell with the smallest PRI value.

[0091] Option 5: For the last DCI among the DCIs indicating the same slot for PUCCH transmission in each cell, the reference DCI is the last DCI in each cell with the largest PRI value.

[0092] Option 6: The reference DCI is the last DCI among the DCIs that indicate the same slot for PUCCH transmission among all cells.

[0093] The DCI may include a DCI to schedule a PDSCH, a DCI to indicate an SPS release, a DCI to indicate an SCell dormant state, etc. The DCI may exclude an SPS activation DCI. The slot of the PUCCH transmission may be indicated by the PDSCH-to-HARQ_feedback timing indicator field or a value configured by RRC signaling (e.g., dl-DataToUL-ACK, or dl-DataToUL-ACK-r16, or dl-DataToUL-ACK-DCI-1-2, or dl-DataToUL-ACK-r17, or dl-DataToUL-ACK-MulticastDciFormat4_1).

[0094] VII. Embodiment 7: Final DCI Indication

[0095] One field in the DCI is used to indicate whether the DCI is the last DCI of a cell that indicates the same slot of PUCCH transmission among the DCIs detected by the UE and for which the UE transmits corresponding HARQ-ACK information on the PUCCH. For example, if the DCI contains one bit, '1' indicates that it is the last DCI, and '0' indicates that it is not the last DCI.

[0096] The following options are possible:

[0097] Option 1: If the UE does not receive a DCI indicated as the last DCI for one cell, the UE does not generate feedback for this cell.

[0098] Option 2: If the UE does not receive the DCI indicated as the last DCI of a cell, the UE generates feedback to this cell and adds a 1-bit NACK to the end of the feedback to this cell.

[0099] VIII. Embodiment 8: Indication in PUCCH

[0100] For PUCCHs carrying HARQ-ACK feedback, one bit is included in the PUCCH to indicate whether there is HARQ-ACK feedback for a cell or group(s) of cells.

[0101] Taking FIG. 5 as an example, one bit is for cell 0 and another bit is for cell 1 and cell 2, since cell 2 and cell 2 are configured as a group of cells.

[0102] The implementations described above apply to wireless communications. Figure 6 illustrates an example of a wireless communication system (e.g., a 5G or NR cellular network) including a base station 620 and one or more user equipments (UEs) 611, 612, 613. In one embodiment, the UE accesses a BS (e.g., a network) using a communication link to the network (sometimes referred to as the uplink direction, as indicated by dashed arrows 631, 632, 633), after which subsequent communication is possible from the BS to the UE (sometimes referred to as the downlink direction, as indicated by arrows 641, 642, 643 in the network-to-UE direction). In one embodiment, the BS transmits information to the UE (sometimes referred to as the downlink direction, as indicated by arrows 641, 642, 643). This allows subsequent communication to occur from the UE to the BS (sometimes referred to as the uplink direction, as indicated by dashed arrows 631, 632, 633 from the UE to the BS). The UE may be, for example, a smartphone, a tablet, a mobile computer, a machine-to-machine (M2M) device, an Internet of Things (IoT) device, or the like.

[0103] FIG. 7 shows an example 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., user equipment, UE). The hardware platform 700 includes at least one processor 710 and a memory 705 having instructions stored thereon. The instructions executed by the processor 710 configure the hardware platform 700 to perform the operations described in FIGS. 1-6, 8-9, and in various embodiments described herein. The transmitter 715 transmits information or data to another device. For example, a transmitter of a network device may send a message to a user equipment. The receiver 720 receives information or data transmitted or sent by another device. For example, a user equipment may receive a message from a network device.

[0104] 8 shows an example flowchart for transmitting HARQ-ACK information bits. Operation 802 includes receiving, by a communication device, control information from a cell, the control information including a field including a value, the value indicating a current number of control channel monitoring opportunities associated with the cell and to be monitored by the communication device, the current number of control channel monitoring opportunities being part of a series of numbers associated with a set of control channel monitoring opportunities in which a control channel has been or will be received from the cell. Operation 804 includes transmitting one or more hybrid automatic repeat request-acknowledgement (HARQ-ACK) information bits indicating whether a shared channel associated with the control channel monitoring opportunity has been received by the communication device or indicating that the communication device has received the control information.

[0105] In one embodiment, the value of the field indicates the current number of control channel monitoring opportunities associated with a cell, where the cell is a scheduling cell for one scheduled cell in a group of scheduled cells. In one embodiment, the value of the field indicates the current number of control channel monitoring opportunities associated with a cell and one or more other cells, where the cell is a scheduling cell for a group of scheduled cells that includes the cell and one or more other cells. In one embodiment, the field is based on or indicates a control channel monitoring opportunity index of a control channel monitoring opportunity, or a shared channel reception start time of a shared channel and a control channel monitoring opportunity index of a control channel monitoring opportunity, or a shared channel reception start time, a serving cell index, and a control channel monitoring opportunity index of a control channel monitoring opportunity. In an embodiment, the method further includes receiving second control information including a second field having a second value indicating a total number of control channel monitoring opportunities in a set of control channel monitoring opportunities associated with the cell, and transmitting one or more HARQ-ACK information bits includes obtaining multiplexed HARQ-ACK information bits by multiplexing a plurality of HARQ-ACK information bits indicating whether a set of shared channels has been received by the communication device and / or that the communication device has received the control information, wherein the plurality of HARQ-ACK information bits include one or more HARQ-ACK information bits; and transmitting the multiplexed HARQ-ACK information bits on an uplink shared channel scheduled by the control channel including the second field.

[0106] In an embodiment, the second value of the second field indicates a total number of control channel monitoring opportunities in a set of control channel monitoring opportunities associated with the cell that is the reference cell, and the communications device determines one or more second values ​​associated with the one or more other cells based on the second value of the second field, each of the one or more second values ​​indicating a total number of control channel monitoring opportunities in one set of control channel monitoring opportunities associated with one of the one or more other cells. In an embodiment, the second field of the second value is a total downlink allocation indicator (T-DAI) field of the cell, and the communications device determines a third value of the second T-DAI field based on the second value of the T-DAI field, the third value of the second T-DAI field indicating a second total number of control channel monitoring opportunities in a second set of control channel monitoring opportunities associated with the second cell and to be monitored by the communications device, the second value being referred to as Y and the third value being referred to as X. In one embodiment, X is equal to the largest number (X1) in a series of numbers associated with a set of control channel monitoring opportunities where a control channel has been or will be received from the cell.

[0107] In an embodiment, X1 is a maximum value in a series of numbers associated with a set of control channel monitoring opportunities in which a control channel has been or will be received from the cell, and in response to X being greater than X1, the communications device transmits a negative acknowledgement (NACK) value of the HARQ-ACK information bit corresponding to the last X-X1 Counter Downlink Assignment Indicator (C-DAI) value in the HARQ-ACK codebook for at least a portion of a second set of control channel monitoring opportunities. In an embodiment, X=p*Y, where p is a scaling factor and p is an integer greater than 0. In an embodiment, [ka] where p is a scaling factor, p is an integer or a decimal, and p is greater than 0. In an embodiment, p is determined by the subcarrier spacing, the numerology corresponding to the subcarrier spacing, the total number of control channel monitoring opportunities, or the PDCCH monitoring capability, or p is configured by the base station.

[0108] In one embodiment, X=Y+q, where q is an integer, and q is determined by the subcarrier spacing, the numerology corresponding to the subcarrier spacing, the total number of control channel monitoring opportunities, or the PDCCH monitoring capability, or q is configured by the base station. In one embodiment, (X-1) mod T+1=(Y-1) mod T+1, where T and N are integers. In one embodiment, T is 2 N where X, Y, and N are integers greater than 0. In one embodiment, X is greater than or equal to the total number of control channel monitoring opportunities in the set of control channel monitoring opportunities at which a control channel was received. In one embodiment, the cell is a reference cell, and the communications device determines not to generate or transmit feedback to the second cell in response to the second value of the T-DAI field being greater than zero and the communications device determining that one or more control channels have not been received from the second cell. In one embodiment, the cell is a reference cell, and the communications device generates and transmits one bit of negative acknowledgment (NACK) information to the second cell in response to the second value of the T-DAI field being greater than M, where M is an integer greater than zero, and the communications device determining that one or more control channels have not been received from the second cell.

[0109] In one embodiment, the cell is a reference cell, and in response to determining that one or more control channels from the cell are not received, the communications device determines not to generate or transmit feedback to the cell, and the communications device generates and transmits feedback to the second cell based on a value indicating a second current number of second control channel monitoring opportunities associated with the second cell. In one embodiment, the cell is a reference cell, and the method further includes receiving second control information including a second field including a second value indicating a total number of control channel monitoring opportunities in a set of control channel monitoring opportunities associated with the cell, and in response to the second value being equal to zero, the communications device determines not to generate or transmit feedback to the cell, and the communications device generates and transmits feedback to the second cell based on a value indicating a second current number of second control channel monitoring opportunities associated with the second cell. In one embodiment, the field includes a counter-downlink assignment indicator (C-DAI) field. In one embodiment, the control information includes downlink control information (DCI).

[0110] 9 shows an example flowchart for receiving HARQ-ACK information bits. Operation 902 includes transmitting, by a network device, control information including a field containing a value, the value indicating a current number of control channel monitoring opportunities associated with a cell of the network device and to be monitored by the communication device, the current number of control channel monitoring opportunities being part of a series of numbers associated with a set of control channel monitoring opportunities in which a control channel has been or will be transmitted from the cell to the communication device. Operation 904 includes receiving one or more hybrid automatic repeat request-acknowledgement (HARQ-ACK) information bits indicating whether a shared channel associated with the control channel monitoring opportunity has been received by the communication device or that the communication device has received the control information.

[0111] In one embodiment, the value of the field indicates the current number of control channel monitoring opportunities associated with a cell, where the cell is a scheduling cell for one scheduled cell in a group of scheduled cells. In one embodiment, the value of the field indicates the current number of control channel monitoring opportunities associated with a cell and one or more other cells, where the cell is a scheduling cell for a group of scheduled cells that includes the cell and one or more other cells. In one embodiment, the field is based on or indicates a control channel monitoring opportunity index of a control channel monitoring opportunity, or a shared channel reception start time of a shared channel and a control channel monitoring opportunity index of a control channel monitoring opportunity, or a shared channel reception start time, a serving cell index, and a control channel monitoring opportunity index of a control channel monitoring opportunity. In an embodiment, the method further includes transmitting second control information including a second field including a second value indicating a total number of control channel monitoring opportunities in a set of control channel monitoring opportunities associated with the cell, and receiving one or more HARQ-ACK information bits includes receiving multiplexed HARQ-ACK information bits in an uplink shared channel scheduled by the control channel including the second field, wherein the multiplexed HARQ-ACK information bits include a plurality of HARQ-ACK information bits and one or more HARQ-ACK information bits indicating whether the set of shared channels has been received by the communication device and / or that the communication device has received control information.

[0112] In one embodiment, the second value of the second field indicates a total number of control channel monitoring opportunities in a set of control channel monitoring opportunities associated with the cell that is the reference cell. In one embodiment, the second field of the second value is a cell Total Downlink Allocation Indicator (T-DAI) field. In one embodiment, the field includes a Counter Downlink Allocation Indicator (C-DAI) field. In one embodiment, the control information includes Downlink Control Information (DCI).

[0113] In this document, the term "exemplary" is used to mean "example" and is not intended to imply an ideal or preferred embodiment, unless expressly stated otherwise.

[0114] Some of the 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 that includes computer-executable instructions, such as program code, executed by a computer in a network environment. Computer-readable media may include, but are not limited to, removable and non-removable storage devices, including read-only memory (ROM), random access memory (RAM), compact discs (CDs), digital versatile discs (DVDs), and the like. Thus, computer-readable media may include non-transitory storage media. Generally, program modules may include routines, programs, objects, components, data structures, and the like that perform particular tasks or implement particular abstract data types. Computer- or processor-executable instructions, associated data structures, and program modules are examples of program code for executing steps of the methods disclosed herein. The particular sequence of such executable instructions or associated data structures is an example of corresponding acts for implementing the functions described in such steps or processes.

[0115] Some of the disclosed embodiments can be implemented as devices or modules using hardware circuits, software, or a combination thereof. For example, a hardware circuit implementation may include discrete analog and / or digital components integrated, for example, as part of a printed circuit board. Alternatively or additionally, the disclosed components or modules can be implemented as application-specific integrated circuits (ASICs) and / or field-programmable gate array (FPGA) devices. Some embodiments may also or instead include a digital signal processor (DSP), which is a dedicated microprocessor with an architecture optimized for the operational needs of digital signal processing associated with the disclosed functionality of this application. Similarly, various components or subcomponents within each module can be implemented in software, hardware, or firmware. Connections between modules and / or between components within a module can be achieved using any one of the connection methods and media known to those skilled in the art, including, but not limited to, communication via the Internet, wired, or wireless networks using appropriate protocols.

[0116] While this document contains many details, these should not be construed as limitations on the scope of the claimed invention or what may be claimed, but rather as descriptions of features specific to particular embodiments. Certain features described in this document in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment can also be implemented separately in multiple embodiments or in any suitable subcombination. Furthermore, even if features are described above as functioning in a particular combination and originally claimed as such, one or more features from a claimed combination can, in some cases, be deleted from the combination, and the claimed combination may be directed to a subcombination or variations of the subcombination. Similarly, although the figures may show acts in a particular order, it should not be understood that such acts need to be performed in the particular order shown, or in any sequential order, or that all of the acts shown need to be performed, to achieve desirable results.

[0117] Only some embodiments and examples have been described; other embodiments, enhancements, and variations can be made based on what is described and illustrated in this disclosure.

Claims

1. 1. A method of wireless communication, comprising: receiving, by a communications device, first downlink control information (DCI) from a cell, the first downlink control information (DCI) including a counter-downlink assignment indicator (C-DAI) field having a first value, the first value indicating a control channel monitoring opportunity from a first set of control channel monitoring opportunities associated with the cell and to be monitored by the communications device; receiving, by the communications device, from the cell, a second DCI including a Total Downlink Allocation Indicator (T-DAI) field having a second value, the second value indicating a total number of control channel monitoring opportunities in the first set of control channel monitoring opportunities; determining, by the communications device, a third value based on the second value, the third value indicating a total number of control channel monitoring opportunities in a second set of control channel monitoring opportunities associated with another cell to be monitored by the communications device; transmitting multiplexed Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) information bits in an uplink shared channel scheduled by a control channel, the multiplexed HARQ-ACK information bits including one or more bits, the one or more bits indicating whether a set of shared channels has been received by the communication device or whether the communication device has received the first DCI; A method comprising:

2. The method described in claim 1, wherein the cell is a scheduling cell for a group of scheduled cells.

3. 1. A method of wireless communication, comprising: transmitting, by a network device, first downlink control information (DCI) including a counter-downlink assignment indicator (C-DAI) field having a first value, the first value indicating a control channel monitoring opportunity from a first set of control channel monitoring opportunities associated with a cell of the network device and to be monitored by a communication device; the network device transmitting a second DCI including a Total Downlink Allocation Indicator (T-DAI) field having a second value, the second value indicating a total number of control channel monitoring opportunities in the first set of control channel monitoring opportunities, the second value being configured to enable the communications device to determine a third value based on the second value, the third value indicating a total number of control channel monitoring opportunities in a second set of control channel monitoring opportunities associated with another cell of the network device to be monitored by the communications device; receiving multiplexed Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) information bits from an uplink shared channel scheduled by a control channel, the multiplexed HARQ-ACK information bits including one or more bits, the one or more bits indicating whether a set of shared channels has been received by the communication device or whether the communication device has received the first DCI; A method comprising:

4. The method of claim 3 , wherein the cell is a scheduling cell for a group of scheduled cells.

5. The method described in claim 3, wherein the cell is a reference cell.

6. The method of claim 1, wherein the first DCI includes a DCI format for scheduling a downlink physical shared channel, and the second DCI includes a DCI format for scheduling an uplink shared channel.

7. The method of claim 1, wherein the first DCI and the second DCI include a DCI format that schedules a downlink shared channel.

8. The method of claim 3, wherein the first DCI includes a DCI format for scheduling a downlink physical shared channel, and the second DCI includes a DCI format for scheduling an uplink shared channel.

9. The method of claim 3, wherein the first DCI and the second DCI include a DCI format that schedules a downlink shared channel.

10. An apparatus for wireless communication, the apparatus comprising a processor, the processor configured to perform a method according to any one of claims 1, 2, 6 and 7.

11. A non-transitory computer-readable program storage medium having stored thereon code which, when executed by a processor, causes the processor to perform a method according to any one of claims 1, 2, 6 and 7.

12. An apparatus for wireless communication, the apparatus comprising a processor, the processor configured to perform a method according to any one of claims 3, 5, 8 and 9.

13. A non-transitory computer-readable program storage medium having stored thereon code which, when executed by a processor, causes the processor to perform a method according to any one of claims 3, 5, 8 and 9.

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