Techniques for constructing a hybrid automatic repeat request acknowledgement codebook

Abstract

Techniques for constructing a semi-static hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook are described. An example wireless communication method includes determining, by a communication device configured to communicate with a first cell and a second cell, a location of a first time slot associated with the first cell, the first time slot overlapping a second time slot associated with the second cell, where the second time slot is configured for transmission of hybrid automatic repeat request (HARQ) acknowledgement (ACK) information; determining, based on the location of the first time slot and a set of values associated with the first cell, a plurality of time slots associated with the first cell and the second cell for the HARQ-ACK information; and transmitting, by the communication device to the second cell in the second time slot, the HARQ-ACK information for the plurality of time slots.

Description

Technical Field

[0001] This disclosure generally relates to digital wireless communications. Background Technology

[0002] Mobile telecommunications technologies are driving the world toward an increasingly interconnected and networked society. Compared to existing wireless networks, next-generation systems and wireless communication technologies will need to support a wider range of use case characteristics and provide a broader range of complex and advanced access requirements with greater 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 a wireless communication standard that enhances the LTE standard. The fifth-generation wireless system, known as 5G, advances the LTE and LTE-A wireless standards and aims to support higher data rates, massive connectivity, ultra-low latency, high reliability, and other emerging service requirements. Summary of the Invention

[0004] At least the following techniques are disclosed: when configuring semi-static Physical Uplink Control Channel (PUCCH) carrier switching, constructing a semi-static Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) codebook (e.g., a Type 1 HARQ-ACK codebook).

[0005] An example wireless communication method includes: determining, by a communication device configured to communicate with a first cell and a second cell, the location of a first timeslot associated with the first cell overlaps with a second timeslot associated with the second cell, wherein the second timeslot is configured for transmission of mixed Automatic Repeat Request (HARQ) Acknowledgment (ACK) information; determining, based on the location of the first timeslot and a set of values ​​associated with the first cell, a plurality of timeslots associated with the first and second cells for HARQ-ACK information; and transmitting, by the communication device, the HARQ-ACK information for the plurality of timeslots in the second timeslot to the second cell.

[0006] In some embodiments, the plurality of time slots includes a first time slot set associated with a first cell and a second time slot set associated with a second cell, and each time slot from the first time slot set of the first cell overlaps with one time slot from the second time slot set of the second cell. In some embodiments, the time slot length of the first cell is the same as the time slot length of the second cell. In some embodiments, the plurality of time slots includes a first time slot set associated with a first cell and a second time slot set associated with a second cell, and each time slot from the first time slot set of the first cell overlaps with two or more time slots from the second time slot set of the second cell. In some embodiments, the time slot length of the first cell is greater than the time slot length of the second cell.

[0007] In some embodiments, the HARQ-ACK information includes first HARQ-ACK information, which is concatenated with second HARQ-ACK information. The first HARQ-ACK information indicates whether data or signals are received from a first cell on a first time slot set, and the second HARQ-ACK information indicates whether data or signals are received from a second cell on a second time slot set. In some embodiments, the first HARQ-ACK information is concatenated with the second HARQ-ACK information in the HARQ-ACK information based on the ascending order of the carrier indexes of the first and second cells.

[0008] Another example wireless communication method includes: determining, by a communication device configured to communicate with a first cell and a second cell, that at least two locations of at least two time slots associated with the first cell overlap with a time slot associated with the second cell, wherein the time slot associated with the second cell is configured for transmission of mixed Automatic Repeat Request (HARQ) Acknowledgment (ACK) information; determining, based on at least one of the at least two locations of the at least two time slots and a set of values ​​associated with the first cell, a plurality of time slots associated with HARQ-ACK information for the first and second cells; and transmitting, by the communication device, the HARQ-ACK information for the plurality of time slots in the time slot associated with the second cell to the second cell.

[0009] In some embodiments, determining the plurality of time slots is performed based on at least two locations of the at least two time slots, the plurality of time slots comprising a first time slot set associated with a first cell and a second time slot set associated with a second cell, and each time slot from the second time slot set of the second cell overlaps with two or more time slots from the first time slot set of the first cell. In some embodiments, determining the plurality of time slots is performed based on a location of one time slot from the at least two time slots, the plurality of time slots comprising a first time slot set associated with a first cell and a second time slot set associated with a second cell, and each time slot from the second time slot set of the second cell overlaps with two or more time slots from the first time slot set of the first cell. In some embodiments, the time slot length of the first cell is less than the time slot length of the second cell.

[0010] In some embodiments, the HARQ-ACK information includes first HARQ-ACK information, which is concatenated with second HARQ-ACK information. The first HARQ-ACK information indicates whether data or signals are received from a first cell on a first time slot set, and the second HARQ-ACK information indicates whether data or signals are received from a second cell on a second time slot set. In some embodiments, the first HARQ-ACK information is concatenated with the second HARQ-ACK information in the HARQ-ACK information based on the ascending order of the carrier indexes of the first and second cells.

[0011] In some embodiments, the at least two time slots or the one time slot is determined based on the following: the at least two time slots or the one time slot overlaps with a time slot associated with a second cell, and the at least two time slots or the one time slot is associated with one or more time slots for receiving data or signals from a first cell or a second cell based on a set of values ​​associated with a first cell. In some embodiments, in response to determining the plurality of time slots associated with a first cell and a second cell, the method further includes: determining that two time slots from the plurality of time slots are duplicates; and removing one of the two time slots from the plurality of time slots. In some embodiments, the first cell includes a primary cell, and the second cell includes a secondary cell.

[0012] In yet another example, the above method is implemented in the form of processor-executable code and stored in a non-transitory computer-readable storage medium. The code included in the computer-readable storage medium, when executed by a processor, causes the processor to implement the method described in this patent document.

[0013] In yet another exemplary embodiment, a device configured or operable to perform the methods described above is disclosed.

[0014] The above and other aspects and their embodiments are described in more detail in the accompanying drawings, description and claims. Attached Figure Description

[0015] Figure 1 An example of constructing a Type 1 codebook under carrier aggregation is shown.

[0016] Figures 2-3 An example is shown of the construction of a type 1 codebook obtained by the secondary cell (Scell) from the primary cell (Pcell) for one of the time slots n.

[0017] Figures 4-5 An example is shown of the construction of a type 1 codebook in which multiple time slots n are obtained by the secondary cell (Scell) from the primary cell (Pcell).

[0018] Figure 6 Examples of wireless communication systems including base stations (BS) and user equipment (UE) based on some implementations of the disclosed technology are shown.

[0019] Figure 7 An exemplary block diagram of a hardware platform that may be part of a network device or a communication device is shown.

[0020] Figures 8-9 Two exemplary flowcharts for sending HARQ-ACK messages are shown. Detailed Implementation

[0021] At least the following techniques are disclosed: when configuring the semi-static physical uplink control channel (PUCCH) carrier switching, constructing a semi-static hybrid automatic repeat request acknowledgment (HARQ-ACK) codebook (e.g., a type 1 HARQ-ACK codebook).

[0022] The example headings in the following sections are used to facilitate understanding of the disclosed subject matter and do not in any way limit the scope of the claimed subject matter. Therefore, one or more features from one example section may be combined with one or more features from another example section. Furthermore, the term "5G" is used for clarity, but the technologies disclosed in this document are not limited to 5G technology and can be used to implement wireless systems with other protocols.

[0023] I. Introduction

[0024] The User Equipment (UE) can be configured with two carriers to allow semi-static PUCCH carrier switching, these two carriers being denoted as carrier 0 (e.g., Pcell (Primary Cell)) and carrier 1 (e.g., Scell ​​(Secondary Cell)). Thus, carrier 0 (Pcell) will be configured with a PUCCH-config, and carrier 1 (Scell) will also be configured with a PUCCH-config. In existing protocols, in this case, k1 included in the DCI used for scheduling the Physical Downlink Shared Channel (PDSCH) is interpreted based on the slot length of the Pcell (reference carrier) and the PUCCH-config of the Pcell. A description of k1 is included in TS38.213, and k1 in this patent document may be referred to as "k".

[0025] Figure 1 The existing Type 1 HARQ-ACK codebook construction mechanism based on carrier aggregation is illustrated. In the case of multiple carriers, only the Pcell will be configured with a PUCCH-config, such that only the Pcell can be configured with a k1 set (the k1 set can include multiple k1 values). HARQ-ACK PUCCHs are also only allowed to be transmitted in the Pcell; therefore, the Type 1 HARQ-ACK codebook (or described as a Type 1 codebook or HARQ-ACK information) is constructed based on the k1 set of the Pcell and the time slot n used to transmit the HARQ-ACK PUCCH in the Pcell.

[0026] A specific method based on the sets of slots n and k1 can be described as follows: Downlink (DL) slots are determined from each carrier (Pcell and Sell) based on slot n-k1, and then a Type 1 codebook is constructed based on these slots. For example, slots are determined in the Pcell based on slot n-k1 (where k1 is each k1 value in the set of k1), and then slots that overlap in the time domain with the slots determined in the Pcell are determined in the other carriers (Scell). A Type 1 codebook is then constructed based on the slots determined from the Pcell and Scell ​​(excluding uplink (UL) slots).

[0027] The method can also be described as follows: obtain (downlink (DL)) time slots based on time slot n-k1 (in each carrier), and then construct a type 1 codebook based on these time slots. This is suitable for cases with only one carrier or for multiple carriers with equal time slot lengths.

[0028] Referring to the time slots used for PUCCH transmission, if the UE detects a DCI format that schedules PDSCH reception ending in time slot n, or if the UE detects a DCI format indicating SPS (Semi-Persistent Scheduling) PDSCH release or Scell ​​sleep via PDCCH (Physical Downlink Control Channel) reception ending in time slot n, or if the UE detects a request type 3 HARQ-ACK codebook report and does not schedule PDSCH reception via PDCCH reception ending in time slot n, then the UE provides the corresponding HARQ-ACK information in the PUCCH transmission within time slot n+k, where k is the number of time slots, and can be indicated by the PDSCH-to-HARQ_feedback timing indicator field in the DCI format (if present) or can be provided by dl-DataToUL-ACK, dl-DataToUL-ACK-r16, or dl-DataToUL-ACKForDCIFormat1_2. In the case of SPS PDSCH release, or in the case of Scell ​​sleep indication, or in the case of request type 3 HARQ-ACK codebook report and DCI format without scheduling PDSCH reception, k=0 corresponds to the last time slot of PUCCH transmission that overlaps with PDSCH reception or PDCCH reception.

[0029] For semi-static PUCCH carrier switching, HARQ-ACK PUCCH can be transmitted in either the Pcell or Scell ​​based on the semi-static configured PUCCH slot pattern. Therefore, when transmitting a Type 1 codebook PUCCH in slot n of the Pcell, the existing mechanism can be used to directly construct the Type 1 codebook. For example, all DL slots are obtained, and all DL slots are used to construct the Type 1 codebook based on slot n-k1. The k1 set is the k1 set of the Pcell.

[0030] However, how to construct the Type 1 codebook for PUCCH transmission in slot n within an Scell ​​remains a technical problem, especially when the lengths of the Pcell and Scell ​​slots differ. For example, a Pcell slot may contain multiple Scell ​​slots, or an Scell ​​slot may contain multiple Pcell slots. This could be because the Pcell and Scell ​​slots are configured with different subcarrier spacings, or with UL sub-slots. With UL sub-slots configured, the slot length equals the sub-slot length.

[0031] II. Example Implementation

[0032] The UE is configured with a Type 1 codebook and semi-static PUCCH carrier handover between the Pcell and Scell. If the UE is configured with semi-static PUCCH carrier handover, the base station will configure the PUCCH slot pattern between the Pcell and Scell. That is, the UE will be able to know which slots in the Pcell and Scell ​​are allowed for HARQ-ACK PUCCH.

[0033] If the instruction is to transmit a Type 1 codebook HARQ-ACK PUCCH in slot m of the Scell, the UE can generate the Type 1 codebook based on the following rule: The UE can determine slot n from the Pcell. Here, slot n is determined as the slot that overlaps with slot m of the Scell ​​in the time domain. Based on the set of slots n and k1 of the Pcell, the UE determines the DL slots used to construct the Type 1 codebook across all carriers (Pcell and Scell). For example, the DL slots are determined based on slot n-k1 across all carriers.

[0034] The number of time slots n obtained from Pcell varies depending on the circumstances; for example, in... Figure 2 and Figure 3 Only one time slot n was obtained. For another example, in... Figure 4 and Figure 5 Multiple time slots n were obtained. The following sections provide corresponding methods for different scenarios.

[0035] II.(a). Case 1

[0036] In Pcell, the UE determines that there exists only one time slot that overlaps with time slot m in the Scell ​​in the time domain. Thus, in Pcell, only one time slot is identified as time slot n by the UE. This is in Figure 2 and Figure 3 The situation is shown in the figure.

[0037] The UE can construct a type 1 codebook based on the set of time slots n and k1 corresponding to the Pcell.

[0038] The detailed process is as follows: If the UE is configured with semi-static PUCCH carrier handover, for dynamically scheduled PDSCHs or semi-static PDSCH transmissions from one or more carriers, based on existing technology, the UE can obtain the carrier and the time slot from that carrier for the HARQ-ACK PUCCH corresponding to these PDSCHs. If the UE is configured with a Type 1 HARQ-ACK codebook, the Type 1 HARQ-ACK codebook is generated based on the following method:

[0039] If the PUCCH corresponding to the Type 1 HARQ-ACK codebook is to be transmitted in slot m within an Scell ​​(not a Pcell), the UE should determine the slot of the Pcell that overlaps with slot m in the time domain (the slot of the Pcell is labeled as slot n). Slot n can be a UL slot or a DL slot. Then, the UE determines the slots corresponding to the Type 1 HARQ-ACK codebook from the Pcell and Scell ​​based on slot n and k1 corresponding to the Pcell (e.g., these slots are obtained via slot n-k1). Based on these determined slots, the PDSCH corresponding to the HARQ-ACK used to generate the Type 1 codebook is determined. Note: The slots corresponding to the Type 1 codebook are determined from the Scell ​​based on the following rule: slots in the Scell ​​that overlap with slot n-k1 in the Pcell in the time domain are determined as slots corresponding to the Type 1 codebook in the Scell. Here, the k1 value comes from the k1 set of the Pcell.

[0040] For Example 1 ,exist Figure 2 In this example, assume that the k1 set of Pcell is configured as {3,4}, and the k1 set of Scell ​​is configured as {1,2}. The PUCCH corresponding to the Type 1 HARQ-ACK codebook is determined to be transmitted in slot m in Scell. The UE generates the Type 1 HARQ-ACK codebook based on the following procedure:

[0041] The UE determines that the time slot of the Pcell that overlaps with time slot m in the time domain is time slot n.

[0042] The UE determines the time slots corresponding to the Type 1 codebook from the Pcell: Based on the time slots n and k1 corresponding to the Pcell (via time slot n-k1), the UE determines time slots n-4 and n-3 in the Pcell. The first and second time slots are determined as the time slots corresponding to the Type 1 codebook. The PDSCH is determined from the first and second time slots. Based on the determined PDSCH, the Type 1 HARQ-ACK subcodebook 1 is constructed.

[0043] The UE determines the time slots corresponding to the Type 1 codebook from the Scell: Based on the time slots determined from the Pcell, the time slots of the Scell ​​that overlap with the first and second time slots in the Pcell in the time domain are determined as the time slots corresponding to the Type 1 codebook. That is, the first and second time slots in the Scell ​​are determined as the time slots corresponding to the Type 1 codebook. The PDSCH is determined from the first and second time slots in the Scell. Based on the determined PDSCH, the Type 1 HARQ-ACK subcodebook 2 is constructed.

[0044] Based on the ascending order of the carrier indices of Pcell and Scell, type 1 HARQ-ACK subcodebook 1 and type 1 HARQ-ACK subcodebook 2 are concatenated to form the final type 1 HARQ-ACK codebook.

[0045] exist Figure 2 In this context, since Pcell and Scell ​​have the same time slot length, Scell ​​time slots n-4 and n-3 can also be considered to be directly determined by the set of Pcell time slots n and k1. For example, Scell ​​time slots n-4 and n-3 can be directly obtained from time slot n-k1.

[0046] For Example 2 ,exist Figure 3 In this example, assume that the k1 set of Pcell is configured as {3,4}, and the k1 set of Scell ​​is configured as {1,2}. The PUCCH corresponding to the Type 1 HARQ-ACK codebook is determined to be transmitted in slot m in Scell. The UE generates the Type 1 HARQ-ACK codebook based on the following procedure:

[0047] The UE determines that the time slot of the Pcell that overlaps with time slot m in the time domain is time slot n.

[0048] The UE determines the time slots corresponding to the Type 1 codebook from the Pcell: Based on the time slots n and k1 corresponding to the Pcell (via time slot n-k1), the UE determines time slots n-4 and n-3 in the Pcell. The first and second time slots are determined as the time slots corresponding to the Type 1 codebook. The PDSCH is determined from the first and second time slots. Based on the determined PDSCH, the Type 1 HARQ-ACK subcodebook 1 is constructed.

[0049] The UE determines the time slots corresponding to the Type 1 codebook from the Scell: Based on the time slots determined from the Pcell, the time slots of the Scell ​​that overlap with the first and second time slots in the Pcell in the time domain are determined as the time slots corresponding to the Type 1 codebook. That is, the first to fourth time slots in the Scell ​​are determined as the time slots corresponding to the Type 1 codebook. The PDSCH is determined from the first to the fourth time slots in the Scell ​​(note that the fourth time slot of the Scell ​​is not included because it is a UL). The Type 1 HARQ-ACK subcodebook 2 is constructed based on the determined PDSCH.

[0050] Based on the ascending order of the carrier indices of Pcell and Scell, type 1 HARQ-ACK subcodebook 1 and type 1 HARQ-ACK subcodebook 2 are concatenated to form the final type 1 HARQ-ACK codebook.

[0051] II.(b). Case 2

[0052] Within Pcell, there exist multiple time slots that overlap with time slot m in the Scell ​​in the time domain. Thus, these multiple time slots within Pcell are designated as time slot n. For example, in... Figure 4 and Figure 5 middle.

[0053] The UE constructs a type 1 codebook based on the set of time slots n and k1 corresponding to Pcell.

[0054] For each slot n that satisfies condition A (described further below), the UE constructs a Type 1 subcodebook and concatenates these Type 1 subcodebooks to obtain a Type 1 codebook to be transmitted in slot m. Concatenation is performed based on the order of these slots n. The Type 1 subcodebook is constructed based on each slot n that satisfies condition A and the k1 set of Pcells. In some embodiments, the UE may optionally determine whether to apply condition A to slot n. If condition A is not skipped, it helps reduce the overhead of the Type 1 codebook. If condition A is skipped, the UE can use multiple slots n to construct the Type 1 codebook, which helps simplify the process.

[0055] Condition A: Based on the rules for semi-static PUCCH carrier handover, in determining the carrier (or cell) and time slot for transmitting at least one HARQ-ACK PUCCH corresponding to the PDSCH (or PDCCH), the HARQ-ACK PUCCH to be transmitted in time slot m in the Scell ​​is associated with time slot n in the Pcell (or points to time slot n in the Pcell) based on the k1 value in the (active) DCI corresponding to the PDSCH (or PDCCH). Here, time slot n can be a DL time slot or a UL time slot. Time slot m is a UL time slot or a time slot containing UL symbols. TS38.213 describes at least some of the rules in the semi-static PUCCH carrier handover rules.

[0056] The detailed process may include the following: If the UE is configured with semi-static PUCCH carrier handover, for dynamically scheduled PDSCHs or semi-static PDSCH transmissions from one or more carriers, based on existing technology, the UE can obtain the carrier and the time slot from that carrier for the HARQ-ACK PUCCH corresponding to these PDSCHs. If the UE is configured with a Type 1 HARQ-ACK codebook, the Type 1 HARQ-ACK codebook is generated based on the following method:

[0057] If the PUCCH corresponding to the Type 1 HARQ-ACK codebook is to be transmitted in slot m within an Scell ​​(not a Pcell), the UE should determine the time slot of the Pcell that overlaps with slot m in the time domain (the time slot of the Pcell is marked as slot n). Slot n can be a UL time slot or a DL time slot.

[0058] Note: There are multiple time slots n here. For example, there are two time slots n, labeled as time slot n_1 and time slot n_2. It is assumed that both time slot n_1 and time slot n_2 satisfy condition A.

[0059] Then, the UE determines the time slots corresponding to the Type 1 HARQ-ACK codebook from the Pcell and Scell ​​based on the time slots n (time slot n_1 and time slot n_2) and k1 corresponding to the Pcell (e.g., obtaining these time slots via time slot n-k1). From these determined time slots, the PDSCH corresponding to the HARQ-ACK used to generate the Type 1 codebook is determined. Note: The determination of the time slots corresponding to the Type 1 codebook from the Scell ​​is based on the following rule: time slots in the Sell that overlap temporally with time slot n-k1 in the Pcell are determined as the time slots in the Sell corresponding to the Type 1 codebook. Here, the k1 value comes from the k1 set of the Pcell.

[0060] Then, perform the following operations for time slot n_1:

[0061] The UE determines the time slots in the Pcell and Scell ​​corresponding to the Type 1 HARQ-ACK codebook based on time slot n_1 and k1 (via time slot n_1-k1) corresponding to the Pcell. From these determined time slots, the PDSCH used to generate the HARQ-ACK is determined. Note: The determination of the time slot corresponding to the Type 1 codebook from the Scell ​​is based on the following rule: time slots in the Scell ​​that overlap with time slots n_1-k1 in the Pcell in the time domain are determined as the time slots in the Scell ​​corresponding to the Type 1 codebook. Here, the k1 value comes from the k1 set of the Pcell. In this way, the Type 1 HARQ-ACK sub-codebook corresponding to time slot n_1 is determined.

[0062] Then, perform the following operations for time slot n_2:

[0063] The UE determines the time slots corresponding to the Type 1 HARQ-ACK codebook in both the Pcell and Scell ​​based on time slot n_2 and k1 (via time slot n_2-k1) corresponding to the Pcell. From these determined time slots, the PDSCH used to generate the HARQ-ACK is determined. Note: The determination of the time slot corresponding to the Type 1 codebook from the Scell ​​is based on the following rule: time slots in the Scell ​​that overlap with time slot n_2-k1 in the Pcell in the time domain are determined as the time slots corresponding to the Type 1 codebook in the Scell. Here, the k1 value comes from the k1 set of the Pcell. In this way, the Type 1 HARQ-ACK sub-codebook corresponding to time slot n_2 is determined.

[0064] For example, based on the order of time slots n_1 and n_2, the type 1 HARQ-ACK subcodebooks corresponding to time slots n_1 and n_2 are concatenated to obtain the final type 1 HARQ-ACK codebook.

[0065] For example 3 ,exist Figure 4 In this example, assume that the k1 set of Pcell is configured as {6, 8}, and the k1 set of Scell ​​is configured as {1, 2}. The PUCCH corresponding to the Type 1 HARQ-ACK codebook is determined to be transmitted in slot m in Scell. The UE generates the Type 1 HARQ-ACK codebook based on the following procedure:

[0066] The time slot in the Pcell that overlaps with time slot m in the time domain is defined as time slot n. Figure 4 In the given information, there are two time slots n, labeled n_1 and n_2. It is assumed that both time slots n_1 and n_2 satisfy condition A. The UE performs the following operations based on time slots n_1 and n_2 respectively.

[0067] When time slot n is time slot n_1:

[0068] The UE determines the time slots corresponding to the Type 1 codebook from the Pcell: Based on the time slots n and k1 (i.e., time slot n-k1) corresponding to the Pcell, the UE determines time slots n-8 and n-6 ​​in the Pcell. That is, the first and third time slots in the Pcell are determined as time slot n. The PDSCH is determined from the first and third time slots. Based on the determined PDSCH, the Type 1 HARQ-ACK subcodebook 1 is constructed.

[0069] The UE determines the time slots corresponding to the Type 1 codebook from the Scell: Based on the time slots determined from the Pcell, the time slots in the Scell ​​that overlap with the first and third time slots in the Pcell in the time domain are determined as the time slots corresponding to the Type 1 codebook. That is, the first to second time slots in the Scell ​​are determined as the time slots corresponding to the Type 1 codebook. The PDSCH is determined from the first to second time slots in the Scell. Based on the determined PDSCH, the Type 1 HARQ-ACK subcodebook 2 is constructed.

[0070] Based on the ascending order of the carrier indices of Pcell and Scell, type 1 HARQ-ACK subcodebook 1 and type 1 HARQ-ACK subcodebook 2 are concatenated to form type 1 HARQ-ACK codebook.

[0071] When time slot n is time slot n_2:

[0072] The UE determines the time slots corresponding to the Type 1 codebook from the Pcell: Based on the time slots n and k1 corresponding to the Pcell (i.e., time slot n-k1), the UE determines time slots n-8 and n-6 ​​in the Pcell. That is, the second and fourth time slots in the Pcell are determined as time slot n. The PDSCH is determined from the second and fourth time slots. Based on the determined PDSCH, the Type 1 HARQ-ACK subcodebook 3 is constructed.

[0073] The UE determines the time slots corresponding to the Type 1 codebook from the Scell: Based on the time slots determined from the Pcell, the time slots of the Scell ​​that overlap with the second and fourth time slots in the Pcell in the time domain are determined to be the time slots corresponding to the Type 1 codebook. That is, the first to second time slots in the Scell ​​are determined to be the time slots corresponding to the Type 1 codebook. The PDSCH is determined from the first to second time slots in the Scell. The Type 1 HARQ-ACK subcodebook 4 is constructed based on the determined PDSCH. Note: These time slots are the same as the Scell ​​time slots obtained based on time slot n_1.

[0074] Based on the ascending order of the carrier indices of Pcell and Scell, type 1 HARQ-ACK subcodebook 3 and type 1 HARQ-ACK subcodebook 4 are concatenated to form type 1 HARQ-ACK codebook.

[0075] Then, for example, based on the order of slot n, the type 1 HARQ-ACK codebooks corresponding to slot n_1 and slot n_2 are concatenated to obtain the final type 1 HARQ-ACK codebook.

[0076] In Example 3 above, since multiple time slots n are to be determined, such as time slot n_1 and time slot n_2, the time slots determined from the Scell ​​through these multiple time slots n are completely identical. In Example 3, the time slot determined from the Scell ​​through time slot n_1 is the first and second time slots in the Scell. The time slot determined from the Scell ​​through time slot n_2 is also the first and second time slots in the Scell.

[0077] Thus, when constructing a Type 1 codebook, the first and second time slots of the Scell ​​are reused, which will result in a large overhead for the Type 1 codebook.

[0078] An improved method for handling this situation is presented below.

[0079] Based on the above method, the technical features may include the following: as further explained below, when constructing a Type 1 codebook, duplicate time slots in the time slots determined from Pcell and Scell ​​are deleted.

[0080] Solution 1:

[0081] Based on the time slot sets n_1 and k1 of Pcell, time slots are determined from Pcell and Sell, and these time slots are labeled as time slot set A. Based on the time slot sets n_2 and k1 of Pcell, time slots are determined from Pcell and Sell, and these time slots are labeled as time slot set B. The same time slots in sets A and B are labeled as set C. The time slots corresponding to set C are deleted from set B, resulting in a new set B.

[0082] Use set A to construct the type 1 HARQ-ACK subcodebook. For details, please refer to the type 1 HARQ-ACK codebook structure in the method above when slot n is slot n_1.

[0083] Use the new set B to construct the type 1 HARQ-ACK subcodebook. For details, please refer to the type 1 HARQ-ACK codebook structure in the method above when slot n is slot n_2.

[0084] Then, the type 1 HARQ-ACK subcodebooks corresponding to set A and the new set B are concatenated to obtain the final type 1 HARQ-ACK codebook.

[0085] Solution 2:

[0086] Based on the time slot sets n_1 and k1 of Pcell, time slots are determined from Pcell and labeled as set Q1. Based on the above method, in Figure 4 In the Pcell, the determined time slots are the first time slot and the third time slot.

[0087] Based on the time slot sets n_2 and k1 of Pcell, time slots are determined from Pcell and labeled as set Q2. Based on the above method, in Figure 4 In the Pcell, the determined time slots are the second and fourth time slots.

[0088] Therefore, the PDSCH is determined from the first, second, third, and fourth time slots in the Pcell. Based on the determined PDSCH, a type 1 HARQ-ACK subcodebook is constructed.

[0089] Based on the time slot sets n_1 and k1 of Pcell, time slots are determined from Scell ​​and labeled as set P1. Based on the above method, in Figure 4 In Scell, the determined time slots are the first time slot and the second time slot.

[0090] Based on the time slot sets n_2 and k1 of Pcell, time slots are determined from Scell ​​and these time slots are labeled as set P2. Based on the above method, in Figure 4 In Scell, the determined time slots are the first time slot and the second time slot.

[0091] Therefore, the PDSCH is determined from the first and second time slots in the Scell. Based on the determined PDSCH, a HARQ-ACK subcodebook of type 1 is constructed.

[0092] Then, type 1 HARQ-ACK subcodebook 1 and type 1 HARQ-ACK subcodebook 2 are concatenated to obtain the final type 1 HARQ-ACK codebook.

[0093] For example 4 ,exist Figure 5 In this example, assuming the k1 set of Pcell is configured as {6,8} and the k1 set of Scell ​​is configured as {1,2}, the PUCCH corresponding to the Type 1 HARQ-ACK codebook is determined to be transmitted in slot m of the Scell. The UE generates the Type 1 HARQ-ACK codebook based on the following procedure:

[0094] The time slot in the Pcell that overlaps with time slot m in the time domain is defined as time slot n. Figure 5In the given scenario, there are two time slots n, labeled n_1 and n_2. Assume time slot n_1 satisfies condition A, while time slot n_2 does not. Note: Although time slot n_2 overlaps with time slot m in the time domain, none of the HARQ-ACK PUCCHs corresponding to the PDSCH or PDCCH scheduled in the Pcell or Scell ​​are associated with (or point to) time slot n_2 based on (activated) k1 in the DCI. k1 comes from the Pcell. A simple example based on the above assumptions about the value of k1... Figure 5 In the current scenario, no PDSCH is scheduled in the second and fourth time slots of Pcell, and no PDSCH is scheduled in the first and second time slots of Scell ​​(or a PDSCH is scheduled in Scell, but its HARQ-ACK PUCCH does not point to time slot n_2 in Pcell). Therefore, based on the k1 set of Pcell, the UE determines that there is no HARQ-ACK PUCCH corresponding to any PDSCH pointing to time slot n_2. The UE then performs only the following operations based on time slot n_1.

[0095] When time slot n is time slot n_1:

[0096] The UE determines the time slots corresponding to the Type 1 codebook from the Pcell: Based on the time slots n and k1 corresponding to the Pcell (i.e., time slot n-k1), the UE determines time slots n-8 and n-6 ​​in the Pcell. That is, the first and third time slots in the Pcell are determined as time slot n. The PDSCH is determined from the first and third time slots. Based on the determined PDSCH, the Type 1 HARQ-ACK subcodebook 1 is constructed.

[0097] The UE determines the time slots corresponding to the Type 1 codebook from the Scell: Based on the time slots determined from the Pcell, the time slots of the Scell ​​that overlap with the first and third time slots in the Pcell in the time domain are determined as the time slots corresponding to the Type 1 codebook. That is, the first to second time slots in the Scell ​​are determined as the time slots corresponding to the Type 1 codebook. The PDSCH is determined from the first to second time slots in the Scell. Based on the determined PDSCH, the Type 1 HARQ-ACK subcodebook 2 is constructed.

[0098] Based on the ascending order of the carrier indices of Pcell and Scell, type 1 HARQ-ACK subcodebook 1 and type 1 HARQ-ACK subcodebook 2 are concatenated to form the final type 1 HARQ-ACK codebook.

[0099] Another possible approach is as follows, in order to avoid greater redundancy overhead in the Type 1 HARQ-ACK codebook.

[0100] The UE expects that there is always only one time slot n that satisfies condition A. That is, in the Pcell, when multiple time slots overlap with time slot m in the time domain, only one time slot n can satisfy condition A. The UE determines the time slots based on the unique set of time slots n and k1 in the Pcell to construct a Type 1 HARQ-ACK codebook from all carriers. Condition A is as described above.

[0101] To construct a type 1 HARQ-ACK codebook, another technical feature is provided below.

[0102] Given the same background described above, if the PUCCH corresponding to the Type 1 HARQ-ACK codebook is determined to be transmitted in slot m within the Scell, the UE generates the Type 1 HARQ-ACK codebook based on the following procedure:

[0103] Based on the ratio (denoted as R) of the slot length of the Pcell to the slot length of the Scell, the UE scales the k1 values ​​in the k1 set of the Pcell to obtain a new k1 set. Using this new k1 set, the slots corresponding to the Type 1 codebook are determined from the Scell. Then, based on the slots determined in the Scell, slots are determined from the Pcell to construct the Type 1 codebook. Next, the PDSCH is determined based on the slots determined from the Pcell and Scell. A Type 1 HARQ-ACK codebook is constructed based on the determined PDSCH.

[0104] For example, in Figure 5 In this example, assume that the k1 set of Pcell is configured as {6, 8}, and the k1 set of Scell ​​is configured as {1, 2}. The ratio of the time slot length of Pcell to the time slot length of Scell ​​is R, and R = 1:2. Therefore, the k1 values ​​in the k1 set of Pcell are scaled as follows: the new k1 value = k1 * (1:2), and rounded up. Then, the new k1 set is {3, 4}.

[0105] For Scell, the UE determines the time slot corresponding to the Type 1 codebook from the Scell ​​based on time slot m and the new k1 set. For example, time slots m-3 and m-4 are determined as time slots corresponding to the Type 1 codebook. That is, Figure 5 The first and second time slots of the Scell ​​are determined to correspond to the type 1 codebook. The PDSCH is determined from the first and second time slots. The type 1 HARQ-ACK subcodebook 1 is constructed based on the determined PDSCH.

[0106] In the Pcell, time slots that overlap in the time domain with those determined in the Scell ​​are identified as time slots corresponding to the Type 1 codebook. That is, Figure 5The first to fourth time slots of the Pcell are determined to correspond to the Type 1 codebook. The PDSCH is determined from the first to the fourth time slot. Based on the determined PDSCH, the Type 1 HARQ-ACK subcodebook 2 is constructed.

[0107] Then, type 1 HARQ-ACK subcodebook 1 and type 1 HARQ-ACK subcodebook 2 are concatenated to obtain the final type 1 HARQ-ACK codebook.

[0108] The implementation methods discussed in this patent document can be applied to wireless communication. Figure 6 An example of a wireless communication system (e.g., a 5G or New Radio (NR) cellular network) including a base station 620 and one or more user equipments (UEs) 611, 612, and 613 is shown. In some embodiments, the UE accesses the BS (e.g., the network) using a communication link to the network (sometimes referred to as the uplink direction, as depicted by dashed arrows 631, 632, and 633), and the communication link subsequently enables subsequent communication from the BS to the UE (e.g., shown in the direction from the network to the UE, sometimes referred to as the downlink direction, indicated by arrows 641, 642, and 643). In some embodiments, the BS sends messages to the UE using a communication link to the UE (sometimes referred to as the downlink direction, as depicted by arrows 641, 642, and 643), and the communication link subsequently enables subsequent communication from the UE to the BS (e.g., shown in the direction from the UE to the BS, sometimes referred to as the uplink direction, indicated by dashed arrows 631, 632, and 633). UE can be, for example, a smartphone, tablet, mobile computer, machine-to-machine (M2M) device, Internet of Things (IoT) device, etc.

[0109] Figure 7 An exemplary block diagram of a hardware platform 700 is shown, which may be part of a network device (e.g., a base station) or a communication device (e.g., a user equipment (UE)). The hardware platform 700 includes at least one processor 710, a memory 705 storing instructions thereon, a transmitter 715, and a receiver 720. The instructions, executed by the processor 710, configure the hardware platform 700 to perform operations in... Figures 1 to 6 and Figures 8 to 9 The operations described in the various embodiments described in this patent document are as follows: Transmitter 715 sends or transmits information or data to another device. For example, a network device transmitter can send a message to a user equipment. Receiver 720 receives information or data sent or transmitted by another device. For example, a user equipment can receive a message from a network device.

[0110] Figure 8An exemplary flowchart for sending HARQ-ACK information is shown. Operation 802 includes: determining, by a communication device configured to communicate with a first cell and a second cell, the location of a first timeslot associated with the first cell, the first timeslot overlapping with a second timeslot associated with the second cell, wherein the second timeslot is configured for the transmission of mixed Automatic Repeat Request (HARQ) Acknowledgment (ACK) information (e.g., a HARQ-ACK codebook). Operation 804 includes: determining, based on the location of the first timeslot and a set of values ​​associated with the first cell, a plurality of timeslots associated with the first and second cells for HARQ-ACK information. Operation 806 includes: transmitting, by the communication device, the HARQ-ACK information for the plurality of timeslots in the second timeslot to the second cell.

[0111] In some embodiments, the plurality of time slots includes a first time slot set associated with a first cell and a second time slot set associated with a second cell, and each time slot from the first time slot set of the first cell overlaps with one time slot from the second time slot set of the second cell. In some embodiments, the time slot length of the first cell is the same as the time slot length of the second cell. In some embodiments, the plurality of time slots includes a first time slot set associated with a first cell and a second time slot set associated with a second cell, and each time slot from the first time slot set of the first cell overlaps with two or more time slots from the second time slot set of the second cell. In some embodiments, the time slot length of the first cell is greater than the time slot length of the second cell.

[0112] In some embodiments, the HARQ-ACK information includes first HARQ-ACK information, which is concatenated with second HARQ-ACK information. The first HARQ-ACK information indicates whether data or signals are received from a first cell on a first time slot set, and the second HARQ-ACK information indicates whether data or signals are received from a second cell on a second time slot set. In some embodiments, the first HARQ-ACK information is concatenated with the second HARQ-ACK information in the HARQ-ACK information based on the ascending order of the carrier indexes of the first and second cells.

[0113] Figure 9An exemplary flowchart for sending HARQ-ACK information is shown. Operation 902 includes: a communication device configured to communicate with a first cell and a second cell determining that at least two locations of at least two time slots associated with the first cell overlap with a time slot associated with the second cell, wherein the time slot associated with the second cell is configured for the transmission of mixed Automatic Repeat Request (HARQ) Acknowledgment (ACK) information. Operation 904 includes: determining a plurality of time slots associated with the first cell and the second cell for HARQ-ACK information based on at least one of the at least two locations of the at least two time slots and a set of values ​​associated with the first cell. Operation 906 includes: the communication device transmitting the HARQ-ACK information for the plurality of time slots in the time slot associated with the second cell to the second cell.

[0114] In some embodiments, the determination of the plurality of time slots is performed based on at least two locations of the at least two time slots, the plurality of time slots including a first time slot set associated with a first cell and a second time slot set associated with a second cell, and each time slot from the second time slot set of the second cell overlaps with two or more time slots from the first time slot set of the first cell. In some embodiments, the determination of the plurality of time slots is performed based on a location of one time slot from the at least two time slots, the plurality of time slots including a first time slot set associated with a first cell and a second time slot set associated with a second cell, and each time slot from the second time slot set of the second cell overlaps with two or more time slots from the first time slot set of the first cell. In some embodiments, the time slot length of the first cell is less than the time slot length of the second cell.

[0115] In some embodiments, the HARQ-ACK information includes first HARQ-ACK information, which is concatenated with second HARQ-ACK information. The first HARQ-ACK information indicates whether data or signals are received from a first cell on a first time slot set, and the second HARQ-ACK information indicates whether data or signals are received from a second cell on a second time slot set. In some embodiments, the first HARQ-ACK information is concatenated with the second HARQ-ACK information in the HARQ-ACK information based on the ascending order of the carrier indexes of the first and second cells.

[0116] In some embodiments, the at least two time slots or the one time slot is determined based on the following: the at least two time slots or the one time slot overlaps with a time slot associated with a second cell, and the at least two time slots or the one time slot is associated with one or more time slots for receiving data or signals from a first cell or a second cell based on a set of values ​​associated with a first cell. In some embodiments, in response to determining the plurality of time slots associated with a first cell and a second cell, the method further includes: determining that two time slots from the plurality of time slots overlap; and removing one of the two time slots from the plurality of time slots. In some embodiments, the first cell includes a primary cell, and the second cell includes a secondary cell.

[0117] In this document, the term “exemplary” is used to mean “an example of…” and, unless otherwise stated, does not imply an ideal or preferred embodiment.

[0118] Some embodiments described herein are described in the general context of methods or processes that may be implemented in one embodiment by a computer program product implemented on a computer-readable medium, including computer-executable instructions, such as program code, that are executed by a computer in a networked environment. The computer-readable medium may include removable and non-removable storage devices, including but not limited to read-only memory (ROM), random access memory (RAM), compact discs (CD), digital versatile discs (DVD), etc. Therefore, the computer-readable medium may include non-transitory storage media. Typically, program modules may include routines, programs, objects, components, data structures, etc., that perform a particular task or implement a particular abstract data type. Computer-executable instructions or processor-executable instructions, associated data structures, and program modules represent examples of program code for performing steps of the methods disclosed herein. Specific sequences of such executable instructions or associated data structures represent examples of corresponding actions for implementing the functionality described in these steps or processes.

[0119] Some embodiments of the disclosed examples may be implemented as devices or modules using hardware circuitry, software, or a combination thereof. For example, hardware circuitry implementations may include discrete analog and / or digital components, for instance, integrated as part of a printed circuit board. Alternatively or additionally, the disclosed components or modules may be implemented as application-specific integrated circuits (ASICs) and / or field-programmable gate arrays (FPGAs). Some implementations may additionally or alternatively include a digital signal processor (DSP), which is a dedicated microprocessor with an architecture optimized for the operational requirements of digital signal processing associated with the functions disclosed in this application. Similarly, various components or sub-components within each module may be implemented using software, hardware, or firmware. Connections between modules and / or components within modules may be provided using any of the connection methods and media known in the art, including but not limited to communication over the Internet, wired or wireless networks using appropriate protocols.

[0120] While this document contains numerous details, these details should not be construed as limiting the scope of the claimed invention or any potentially claimed scope, but rather as descriptions of features specific to particular embodiments. Certain features described in the context of different embodiments in this document may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented separately in multiple embodiments, or in multiple embodiments in any suitable sub-combination. Furthermore, although features may be described above as functioning in certain combinations, and even initially claimed in this way, in some cases, one or more features from the claimed combination may be removed from that combination, and the claimed combination may involve sub-combinations or variations thereof. Similarly, although operations are depicted in a specific order in the drawings, this should not be construed as requiring the operation to be performed in the specific order shown or sequentially, or requiring the performance of all shown operations to achieve the desired result.

[0121] Only a few implementations and examples have been described, and other implementations, enhancements and variations can be obtained based on what is described and shown in this disclosure.

Claims

1. A wireless communication method, comprising: The location of a first time slot associated with the first cell is determined by a communication device configured to communicate using a first cell and a second cell, the first time slot overlapping with a second time slot associated with the second cell; The second time slot is configured for the transmission of mixed Automatic Repeat Request Acknowledgment (HARQ-ACK) information; Based on the location of the first time slot and the set of values ​​associated with the first cell, multiple time slots associated with the first cell and the second cell are determined for the HARQ-ACK information; and The communication device sends the HARQ-ACK information associated with the plurality of time slots. The HARQ-ACK information is sent in the second time slot of the second cell.

2. The method according to claim 1, wherein, The plurality of time slots includes a first time slot set associated with the first cell and a second time slot set associated with the second cell, and Each time slot of the first time slot set from the first cell overlaps with one time slot of the second time slot set from the second cell.

3. The method according to claim 2, wherein, The time slot length of the first cell is the same as that of the second cell.

4. The method according to claim 1, in, The plurality of time slots includes a first time slot set associated with the first cell and a second time slot set associated with the second cell, and Each time slot of the first time slot set from the first cell overlaps with two or more time slots of the second time slot set from the second cell.

5. The method according to claim 4, wherein, in, The HARQ-ACK information includes first HARQ-ACK information, which is concatenated with second HARQ-ACK information. The first HARQ-ACK information indicates whether data or signals were received from the first cell on the first time slot set, and The second HARQ-ACK information indicates whether data or signals were received from the second cell on the second time slot set.

6. The method according to claim 5, wherein, Based on the ascending order of the carrier indexes of the first cell and the second cell, the first HARQ-ACK information is concatenated with the second HARQ-ACK information in the HARQ-ACK information.

7. A wireless communication device, comprising a processor, the processor being configured to: The location of a first timeslot associated with the first cell is determined by a processor configured to communicate using a first cell and a second cell, the first timeslot overlapping with a second timeslot associated with the second cell; in, The second time slot is configured for the transmission of mixed Automatic Repeat Request Acknowledgment (HARQ-ACK) information; Based on the location of the first time slot and the set of values ​​associated with the first cell, multiple time slots associated with the first cell and the second cell are determined for the HARQ-ACK information; and Send the HARQ-ACK information associated with the plurality of time slots. The HARQ-ACK information is sent in the second time slot of the second cell.

8. The apparatus according to claim 7, The plurality of time slots includes a first time slot set associated with the first cell and a second time slot set associated with the second cell, and in, Each time slot of the first time slot set from the first cell overlaps with one time slot of the second time slot set from the second cell.

9. The apparatus according to claim 8, in, The time slot length of the first cell is the same as that of the second cell.

10. The apparatus according to claim 7, in, The plurality of time slots includes a first time slot set associated with the first cell and a second time slot set associated with the second cell, and Each time slot of the first time slot set from the first cell overlaps with two or more time slots of the second time slot set from the second cell.

11. The apparatus according to claim 10, in, The HARQ-ACK information includes first HARQ-ACK information, which is concatenated with second HARQ-ACK information. The first HARQ-ACK information indicates whether data or signals were received from the first cell on the first time slot set, and The second HARQ-ACK information indicates whether data or signals were received from the second cell on the second time slot set.

12. The apparatus according to claim 11, wherein, Based on the ascending order of the carrier indexes of the first cell and the second cell, the first HARQ-ACK information is concatenated with the second HARQ-ACK information in the HARQ-ACK information.

13. A non-transitory computer-readable program storage medium, wherein code is stored on the non-transitory computer-readable program storage medium, and wherein, when the code is executed by a processor, the processor is configured to: The location of a first timeslot associated with the first cell is determined by a processor configured to communicate using a first cell and a second cell, the first timeslot overlapping with a second timeslot associated with the second cell; in, The second time slot is configured for the transmission of mixed Automatic Repeat Request Acknowledgment (HARQ-ACK) information; Based on the location of the first time slot and the set of values ​​associated with the first cell, multiple time slots associated with the first cell and the second cell are determined for the HARQ-ACK information; and Send the HARQ-ACK information associated with the plurality of time slots. The HARQ-ACK information is sent in the second time slot of the second cell.

14. The non-transitory computer-readable program storage medium according to claim 13, The plurality of time slots includes a first time slot set associated with the first cell and a second time slot set associated with the second cell, and in, Each time slot of the first time slot set from the first cell overlaps with one time slot of the second time slot set from the second cell.

15. The non-transitory computer-readable program storage medium according to claim 14, in, The time slot length of the first cell is the same as that of the second cell.

16. The non-transitory computer-readable program storage medium according to claim 13, in, The plurality of time slots includes a first time slot set associated with the first cell and a second time slot set associated with the second cell, and Each time slot of the first time slot set from the first cell overlaps with two or more time slots of the second time slot set from the second cell.

17. The non-transitory computer-readable program storage medium according to claim 16, in, The HARQ-ACK information includes first HARQ-ACK information, which is concatenated with second HARQ-ACK information. The first HARQ-ACK information indicates whether data or signals were received from the first cell on the first time slot set, and The second HARQ-ACK information indicates whether data or signals were received from the second cell on the second time slot set.

18. The non-transitory computer-readable program storage medium according to claim 17, wherein, Based on the ascending order of the carrier indexes of the first cell and the second cell, the first HARQ-ACK information is concatenated with the second HARQ-ACK information in the HARQ-ACK information.

19. A wireless communication method, comprising: The network equipment configures a first cell and a second cell for cell handover, as well as the time slot pattern between the first cell and the second cell; The network device configures the second cell for the transmission of mixed Automatic Repeat Request Acknowledgment (HARQ-ACK) information. Wherein, the location of the first time slot associated with the first cell overlaps with the location of the second time slot associated with the second cell, and The second time slot is configured for the transmission of the HARQ-ACK information; and The network device receives the HARQ-ACK information associated with multiple time slots. The plurality of time slots are associated with the first cell and the second cell based on the location of the first time slot and the set of values ​​associated with the first cell. The HARQ-ACK information is received in the second time slot of the second cell.

20. The method according to claim 19, in, The plurality of time slots includes a first time slot set associated with the first cell and a second time slot set associated with the second cell, and Each time slot in the first time slot set from the first cell overlaps with one time slot in the second time slot set from the second cell.

21. The method according to claim 20, wherein, The time slot length of the first cell is the same as that of the second cell.

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