RU2778146C2 - Communication method and device - Google Patents

Abstract

FIELD: wireless communication.

SUBSTANCE: method contains stages: determination by a communication device of a number of physical downlink shared channels (hereinafter – PDSCH) based on a set of values K1 and a table of allocation of time domain resources; determination by the communication device of a number of PDCCHs based on the set of values K1, a value K0 in the table of allocation of time domain resources, a period of a physical downlink control channel (hereinafter – PDCCH), displacement of PDCCH monitoring, and PDCCH monitoring pattern; and determination by the communication device of a codebook of a hybrid automatic repeat request (hereinafter – HARQ) based on the number of PDSCHs and the number of PDCCHs.

EFFECT: provision of effective HARQ transmission.

39 cl, 7 dwg, 6 tbl

Description

The technical field to which the invention belongs

Embodiments of the present invention relate to the field of communication technologies and, in particular, to a communication method and device.

State of the art

The communication system uses a Hybrid Automatic Repeat reQuest (HARQ) to ensure the reliability and efficiency of data transmission during transmission.

The basic principle of HARQ can be understood from the following: the receiving side returns the decoding result of the data received from the transmitting side to the transmitting side, the correct decoding is returned as an Acknowledgment (ACK), and the incorrect decoding is returned as a Negative Acknowledgment (NACK) . If the transmitting side receives an ACK, new data can be transmitted to the receiving side; or, if the transmitting side receives a NACK, the data may be retransmitted to the receiving side.

The technical challenge of providing efficient HARQ feedback is currently urgently needed in the art.

Disclosure of the essence of the invention

Embodiments of the present invention provide a communication method and apparatus for providing efficient HARQ feedback.

To solve the above problem, the following technical solutions are used in the embodiments of the present invention.

According to a first aspect, an embodiment of the present invention provides a communication method. The method includes:

determining by the communication device the number of PDSCHs (or referred to as a set of DL associations) based on the set of K1 values and the time domain resource allocation table; and determining, by the communication device, a HARQ codebook based on the number of PDSCHs.

According to a second aspect, an embodiment of the present invention provides a communication method. The method includes:

determining by the communication device the number of PDSCHs (or referred to as a set of DL associations) based on the set of K1 values and the time domain resource allocation table; determining by the communication device the number of PDCCHs; and determining a HARQ codebook based on the number of PDSCHs and the number of PDCCHs.

With reference to the first aspect or the second aspect, it may be understood that the communication device can efficiently transmit the HARQ Codebook.

With reference to the first aspect or the second aspect, the number of PDSCHs may be understood as the number of PDSCH events, and the number of PDCCHs may be understood as the number of PDCCH monitoring events.

In an exemplary implementation in the first aspect or in the second aspect, the set of K1 values includes a set of timing relationships between the downlink data transmitted by the network device to the communication device via the PDSCH and the HARQ codebook, which is the downlink data that is transmitted by the device. communications back to the network device. The value of K0 includes a time relationship between the downlink scheduling transmitted by the network device to the communication device via the PDCCH and the scheduled downlink data transmitted by the network device to the communication device.

With reference to the above exemplary implementation, in an exemplary implementation of the second aspect, the communication device determines the number of PDCCHs based on a set of K1 values, a K0 value in the time domain resource allocation table, a PDCCH physical downlink control channel period, a PDCCH monitoring offset, and a PDCCH monitoring pattern. .

With reference to the above exemplary implementation, in an exemplary implementation of the second aspect, the communication device determines the HARQ Codebook based on the smaller value between the number of PDSCHs and the number of PDCCHs.

With reference to the above exemplary implementation, in an exemplary implementation of the first aspect or the second aspect, the time domain resource allocation table further includes at least one of time domain resource allocation information and scheduling type.

With reference to the above possible implementation, in the possible implementation of the first aspect or the second aspect, the scheduling type includes the first type and the second type. The first type indicates that downlink data is transmitted via the PDSCH using a slot as the transmission granularity, and the second type indicates that the downlink data is transmitted via the PDSCH using a symbol as the transmission granularity.

According to a third aspect, an embodiment of the present invention provides a communication method. The method includes: receiving by the network device the HARQ codebook transmitted by the communication device.

In an exemplary implementation of the third aspect, the HARQ codebook is determined based on the number of PDCCHs and the number of PDSCHs.

In an exemplary implementation of the third aspect, the HARQ codebook is determined based on the number of PDSCHs.

With reference to the above exemplary implementation, in an exemplary implementation of the third aspect, the network device transmits a set of K1 values, a K0 value in the time domain resource allocation table, a PDCCH physical downlink control channel period, a PDCCH monitoring offset, and a PDCCH monitoring pattern for the communication device to determine number of PDCCHs.

With reference to the above exemplary implementation, in an exemplary implementation of the third aspect, the network device transmits a set of K1 values and a time domain resource allocation table to the communication device to determine the number of PDSCHs.

According to a fourth aspect, an embodiment of the present invention provides an apparatus including at least one processor and at least one memory. The processor is configured to perform the method of any one of the first aspect through the third aspect. At least one memory is connected to at least one processor.

According to a fifth aspect, an embodiment of the present invention provides an apparatus including at least one processor and at least one memory. At least one memory is connected to at least one processor. At least one memory is configured to store computer program code or computer instructions. When one or more processors execute a computer program code or a computer instruction, the device performs the method of any one of the first aspect to the third aspect.

According to a sixth aspect, an embodiment of the present invention provides an apparatus including at least one processor. The processor is configured to perform the method of any one of the first aspect through the third aspect.

According to a seventh aspect, an embodiment of the present invention provides an apparatus including at least one communication interface configured to perform the steps of receiving and transmitting in accordance with the method of any one of the first aspect to the third aspect. In addition, the apparatus may further include at least one processor configured to perform processing steps in accordance with the method of any one of the first aspect through the third aspect. At least one processor is connected to at least one communication interface. Alternatively, the above processing steps include a method for determining a HARQ codebook, a number of PDCCHs, and/or a number of PDSCHs, and the like. Alternatively, the above steps of receiving and transmitting include realizing an exchange of information within a device or realizing a transmission between a network device and a communication device.

According to an eighth aspect, an embodiment of the present invention provides a computer storage medium containing computer instructions. When the computer instructions are executed on the device, the device is configured to perform the method according to the method according to any one of the first aspect to the third aspect.

According to a ninth aspect, an embodiment of the present invention provides a computer program product. When the computer program product is run on the computer, the computer is configured to perform the method according to the method of any one of the first aspect to the third aspect.

According to a tenth aspect, an embodiment of the present invention provides a chip. The microcircuit may be in the form of a device. The chip may be any device from the fourth aspect to the ninth aspect.

A description of the beneficial effects corresponding to the fourth aspect through the tenth aspect can be given with reference to the description of the beneficial effects from the first aspect to the third aspect. Details are not repeated.

Brief description of the drawings

1 is a flowchart of a communication method according to an embodiment of the present invention;

Fig. 2 is a time-frequency domain diagram of a communication method according to an embodiment of the present invention;

Fig. 3 is a flowchart of another communication method according to an embodiment of the present invention;

4 is a time-frequency domain diagram of a communication method according to an embodiment of the present invention;

Fig. 5 is a flowchart of yet another communication method in accordance with an embodiment of the present invention;

Fig. 6 is a block diagram of a device according to an embodiment of the present invention; and

7 is a block diagram of another device according to an embodiment of the present invention.

Implementation of the invention

It should be noted that in this disclosure, the word "as an example" or "for example" is used to provide an example, illustration, or description. Any embodiment or design scheme described as "by way of example" or "for example" in the present disclosure should not be explained as being more preferable or having more advantages than another embodiment or design scheme. Precisely, the use of the word "as an example" or "for example" or the like is intended to represent the related concept in a certain way.

In the present disclosure, "of (of)", "corresponding (corresponding, relavant)" and "corresponding (corresponding)" can be used interchangeably in some cases. It should be noted without emphasizing the difference between "from", "relevant" and "related", the meanings expressed are consistent.

In the present disclosure, the term "multiple" means two or more than two.

The terms "first", "second" and the like in the present invention are used only for differentiation and are not intended to limit the sequence. For example, the first frequency domain resource and the second frequency domain resource are merely intended to distinguish between different frequency domain resources, but are not intended to limit their sequential order.

Identifiers representing quantities in the present invention, such as the English letters i, X, Y, S, C, m, n, Pc, a, b, Nc, etc., may be real numbers and may alternatively be be constants, natural numbers, or the like.

For ease of understanding, the following uses examples to describe some concepts related to embodiments of the present invention.

Carrier: A carrier in embodiments of the present invention includes any one or more combinations of the following: a carrier in a carrier aggregation (CA) scenario, a carrier in a CA scenario, a carrier in a multiple stream aggregation (MSA) scenario , a carrier in a non-MSA scenario, a carrier in a dual connection scenario, and a carrier in a non-DC scenario. A CC in a CA, MSA, or DC scenario may be referred to as a component carrier (CC), for example, including a primary CC or a secondary CC. The serving cell in a CA, MSA, or DC scenario may be a primary cell (PCell) or a secondary cell (secondary cell, SCell). For ease of description, in some scenarios, in the embodiments of the present invention, the CC in the above various scenarios may be understood as a cell. This is not limited in the embodiments of the present invention.

Numerology: Numerology is a parameter used by the communication system. A communication system (eg 5G) can support multiple numerologies. The numerology may be determined using one or more of the following parameter information: subcarrier spacing, cyclic prefix (CP), time block, bandwidth, and the like. A time block can be used to represent a duration or unit of time in the time domain, e.g., sample point, symbol (symbol), mini-slot (mini-slot), slot (slot), set of slots, subframe (subframe), radio frame (radio frame ) or frame structure (frame). The time block information may include the type, length, or structure of the time block.

HARQ codebook: The receiving side can feed back, using the uplink feedback information (eg, UCI), to the transmitting side, the decoding result of the plurality of data pieces transmitted by the transmitting side. The UCI may be transmitted over a physical uplink control channel (PUCCH) or a physical uplink share channel (PUSCH). Multiple chunks of data may be formed from different time blocks, different multiple input multiple output (MIMO) codewords, different BWPs, and different carriers. the HARQ codebook is used to indicate the decoding result of the above one piece or multiple pieces of data, or may also be referred to as HARQ-ACK. The size of the HARQ codebook may be determined using the number of occupied bits, eg, the number of bits occupied by the HARQ codebook in the UCI. the HARQ codebook may be indexed using the correspondence between each number of bits and the corresponding data transmitted by the transmission side.

HARQ codebook feedback form: dynamic form and semi-static form applied. The number of HARQ codebook bits returned in dynamic form typically depends on the actual or current scheduling state. The number of bits of the HARQ codebook returned in semi-static form typically depends on the configuration parameter, and the configuration parameter may be carried by signaling such as high level signaling.

HARQ time sequence and scheduling time sequence:

1. K0: Timing relationship between downlink scheduling and corresponding downlink data transmission (timing between DL assignment and corresponding DL data transmission). The data sent by the transmitting side to the receiving side may be referred to as downlink data. Downlink scheduling such as downlink control information (DCI) may be transmitted from a transmitting side to a receiving side via a physical downlink control channel (PDCCH). Specifically, if the transmitting side transmits DCI to the receiving side in time block n via the PDCCH, the time block corresponding to data that is scheduled using DCI and that is transmitted via a physical downlink shared channel (PDSCH) represents is n + K0. For ease of description, the time blocks associated with K0 are collectively referred to as a slot. However, the time blocks described in the embodiments of the present invention are not limited to a slot. Typically, the transmission side may configure a time domain resource allocation table or a PDSCH symbol allocation table (as shown in FIG. 1). Each row in the time domain resource allocation table may include any one or more of one K0, time domain resource allocation information, and a scheduling type (also referred to as a PDSCH mapping type). The time domain resource allocation information may indicate a time domain resource, for example, indicate a start symbol and number of symbols that are occupied by scheduled data, or indicate a time block occupied by downlink data. For example, time domain resource allocation information may be jointly encoded as a start length indication value (SLIV).

For example, the number of symbols included in one slot may be 14. The scheduling type A represents a transmission slot, and the scheduling type B represents a non-slot or mini-slot transmission. Additionally, the transmitting side may indicate to the receiving side, using DCI, a specific row in the time domain resource allocation table that the time domain resource allocated for data transmission should correspond to. Thus, the receiving side can know the value of K0 and the time domain resource allocated by the transmitting side for data transmission. When the transmit side is a base station and the receive side is a terminal, the base station can transmit a time domain resource allocation table using radio resource control (RRC) signaling. Additionally, a set of values can also be configured for K0, and K0 need not be in the resource allocation table in the time domain.

Table 1

Index number
index K0 Start character Characters Scheduling type (PDSCH display type) 0 0 2 ten A one one 3 eight A 2 0 four 7 B 3 3 2 ten A

2. K1: Timing relationship between downlink data transmission and corresponding HARQ codebook feedback (timing between DL data transmission and corresponding HARQ codebook). Specifically, if the transmitting side transmits downlink data to the receiving side via the PDSCH in time block n, the receiving side transmits uplink feedback information such as uplink control information (UCI) corresponding to the downlink data communication, to the transmission side in time block n + K1. Typically, the receiving side transmits the UCI to the transmitting side via PUSCH or PUCCH. When the transmitting side is a base station and the receiving side is a terminal device, the base station may preconfigure a set of K1 values, for example, {1, 2, 3, 4}, and send the set of K1 values to the terminal device using RRC signaling. The base station then sends a DCI to the tag to notify the tag of the specific K1 value allocated for data transmission in the set.

PDCCH location: A PDCCH location may also be referred to as a PDCCH monitor occasion. The base station needs to notify the terminal device of the PDCCH monitoring method, such as PDCCH location information. Typically, a base station can configure a PDCCH monitoring period, a PDCCH monitoring offset, and a PDCCH monitoring pattern (monitoring pattern or symbol) for a terminal using RRC signaling in one slot. For example, the monitoring period configured by the base station for the terminal is 4 slots, the monitoring offset is 2 slots, and the pattern is characters 0 and 1, the terminal may consider two slots as an offset, monitor every four slots to determine whether a PDCCH exists, and know that the PDCCHs locations are slot 2, slot 6, slot 10, slot 14, ... and slot 2 + 4n, where n is an integer, assuming that symbols 0 and 1 are controlled in the above slots.

PDSCH location: The PDSCH location may also be referred to as a PDSCH event (PDSCH occasion) and may be a PDSCH location that may be used for downlink data transmission. As shown in Table 2, the value 0 K0 in the time domain resource allocation table is used as an example. A value of 0 K0 represents that the PDSCH and PDCCH are in the same slot. As shown in Table 2, this one slot includes 14 symbols used as an example. Based on scheduling type B, that is, one or more PDSCHs can be scheduled in one slot, the terminal knows that four PDSCH locations in one slot can be used by the base station to transmit downlink data to the terminal, and in particular are symbols 0 and 1, symbols 4 and 5, symbols 8 and 9, and symbols 12 and 13. The set of slots in which the PDSCH resides, or the possible set of PDSCH events in which HARQ information can be sent back using the target UCI, may also be referred to. as a downlink association set (DL association set). For example, for a UCI in slot n, the corresponding DL association set is slot n-K1.

table 2

Index number
index K0 Start character Characters Scheduling type (PDSCH display type) 0 0 0 2 B one 0 four 2 B 2 0 eight 2 B 3 0 12 2 B

Bandwidth: Bandwidth can be contiguous resources in the frequency domain. Bandwidth may sometimes be referred to as a bandwidth part (bandwidth part, BWP), carrier bandwidth part, subband bandwidth, narrowband, or some other name. The name is not limited in this invention. For example, one BWP includes K (K> 0) contiguous subcarriers; or one BWP is a frequency domain resource including N contiguous resource blocks (RB) that do not overlap each other, the subcarrier spacing in RB can be 15 kHz, 30 kHz, 60 kHz, 120 kHz, 240 kHz, 480 kHz or other value. Alternatively, one BWP is a frequency domain resource including M contiguous resource block groups (RBGs) that do not overlap, and one RBG includes P contiguous RBs. The RB subcarrier spacing may be 15 kHz, 30 kHz, 60 kHz, 120 kHz, 240 kHz, 480 kHz, or another value such as an integer multiple of 2. For example, one or more BWPs may be configured for a single carrier or cell. The above set of K1 values and a time domain resource allocation table (or may also be referred to as a PDSCH symbol allocation table) may be configured for each BWP. For example, set 1 of K1 and time domain resource allocation table 1 (or may also be referred to as PDSCH symbol allocation table 1) are configured for BWP 1. Set 2 of K1 and time domain resource allocation table 2 (or may also be referred to as table PDSCH symbol assignments) are configured for BWP 2. A single carrier or cell monitoring PDCCH event may be a super-set of PDCCH monitoring events of all BWPs configured or enabled for a carrier or cell. Alternatively, the PDSCH event (or DL association set) of one carrier or cell may be a super-set of PDSCH events (or DL association sets) of all BWPs configured or activated for the carrier or cell.

In embodiments of the present invention, unless otherwise indicated, one cell and one BWP are used as an example for description. A similar status also applies to the case of multiple cells and/or multiple BWPs. Details are not described here again.

Embodiments of the present invention, unless otherwise indicated, can be applied to time division duplex (TDD) or frequency division duplex (FDD). For example, FIG. 2 or FIG. 4 shows a frequency division duplex. To be specific, PDSCH, PDCCH and PUCCH are separately located in different frequency domain resources. However, embodiments of the present invention can also be applied to time division duplex. In particular, the PDSCH, PDCCH, and PUCCH may be located in the same frequency domain resource.

The following describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. In the description of embodiments of the present invention, "/" means "or", unless otherwise indicated. For example, A/B may represent A or B. In this description, "and/or" only describes an association relationship for describing related objects, and represents that three relationships can exist. For example, A and/or B may represent the following three cases: only A exists, both A and B exist, and only B exists. Additionally, in the descriptions in embodiments of the present invention, "multiple" means two or more than two.

A communication device related to embodiments of the present invention may be a device used for transmitting or processing data/signaling in a communication system. For example, the communication device may be a terminal device and may be, in particular, a user equipment (user equipment, UE), an access terminal device, a terminal device unit, a terminal device station, a mobile station, a mobile station, a remote station, a remote terminal device, a mobile device, wireless communication device, tag agent, tag accessory, or the like. The access terminal may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a portable device, having a wireless function, a computing device or other processing device, connected to a wireless modem, mounted on a vehicle, a wearable device, a terminal device in a 5G network, or a terminal device in a future advanced PLMN network. For ease of description, the communication device or the receiving side in the embodiments of the present invention may be collectively referred to as a terminal device.

The network device related to embodiments of the present invention may be a device used for data/signaling transmission or processing. For example, the network device may be a base station, a relay node, an access point, or the like. The base station may be a base transceiver station (BTS) in a global system for mobile communication (GSM) or a code division multiple access (CDMA) or NB (NodeB) network. in wideband code division multiple access (WCDMA) or eNB or eNodeB (evolved NodeB) in LTE. The network device can also be a wireless controller in a cloud radio access network (CRAN) scenario. The network device may also be a gNB in a 5G network, a network device in a future advanced PLMN network, or the like. For ease of description, the network device or transmission side in embodiments of the present invention may be collectively referred to as a base station.

It should be noted that in embodiments of the present invention, unless otherwise indicated, transmission may refer to both sending on the uplink and receiving on the downlink. Uplink sending can be understood that the communication device is transmitting data and/or signaling on the uplink to the network device, and receiving on the downlink can be understood that the communication device is receiving data and/or signaling on the downlink, sent by the network device.

Referring to FIG. 1, an embodiment of the present invention provides a communication method. The method may include the following steps:

101. Determine the number of PDSCHs (or referred to as the DL association set) based on the K1 value set and the time domain resource allocation table.

102. Determine the HARQ Codebook based on the number of PDSCHs (or referred to as the set of DL associations).

For example, steps 101 and 102 may be performed by a communication device, a terminal device, or a chip.

In this embodiment of the present invention, the number of PDSCHs can be understood as the number of PDSCH events. For example, the base station may transmit a set of downlink data PDSCH events to the terminal device, or the terminal device may determine the set of PDSCH events based on a parameter, such as a set of K1 values, preconfigured by the base station or sent by the base station using RRC signaling and/or some or all of the pieces of information in the resource allocation table in the time domain. The PDSCH feedback information may be sent back in the same UCI. The number of PDCCHs can be understood as the number of PDCCH monitoring events, namely the PDCCH event set in which the PDCCH is located, used by the base station to transmit downlink scheduling information to the terminal. The PDSCH feedback information scheduled using the PDCCH may be sent back on the same UCI.

That the terminal determines the number of PDSCHs based on the set of K1 values and the time domain resource allocation table can be understood to mean that the terminal determines the number of PDSCHs based on at least one piece of information included in the resource allocation table during time domain and a set of values K1. For example, the terminal determines the number of PDSCHs based on the time domain resource allocation information in the time domain resource allocation table and the K1 value set, or determines the number of PDSCHs based on the scheduling type in the time domain resource allocation table and the K1 value set, or determines the number of PDSCHs based on the scheduling type and the time domain resource allocation information in the time domain resource allocation table and the K1 value set. For example, the set of K1 values includes a set of timing values between the downlink data transmitted by the network device to the communication device via the PDSCH and the HARQ codebook, the downlink data returned by the communication device to the network device.

For example, the value of K0 is a time relationship value between the downlink scheduling transmitted by the network device to the communication device via the PDCCH and the downlink scheduled data transmitted by the network device to the communication device.

Further, the method may include:

receiving by the terminal a set of K1 values and a time domain resource allocation table that are sent by the base station.

For example, the base station may configure a set of K1 values and a time domain resource allocation table for a terminal device using RRC signaling. The set of K1 values and the time domain resource allocation table may be configured based on the BWP. The RRC signaling used to configure the K1 value set and the time domain resource allocation table may be the same signaling or different signaling.

Additionally, the set of values K1 and the resource allocation table in the time domain at step 101 may have one or more of the following possible cases.

Case 1: The value set K1 is the union set of the first set and the second set. The second set may be a set of K1 values used for scheduling using a fallback DCI or a fallback DCI, such as DCI format 1_0, in a common search space. Since the fallback DCI may be used before an RRC connection is established, the set of K1 values corresponding to the fallback DCI is typically not configured using RCC signaling, or may be predefined by the system (such as a network access device, a main network device, or a base station) or configured using the remaining minimum system information (RMSI). The first set may be a K1 value set that is configured using RRC signaling and that is used for scheduling using non-fallback DCI (non-fallback DCI), such as DCI format 1_1, or that is used for scheduling using DCI fallback at a specific space terminal. search. Whether a PDSCH event or a PDCCH event may be scheduled using a standby DCI or may be scheduled using a non-fallback DCI must be considered in the process of determining the event PDSCH and/or event PDCCH. Therefore, it is determined that K1 used for the HARQ codebook is the union set of the first set and the second set. For example, the first set is {1, 2} and the second set is {2, 3, 4}, so the set of values of K1 is {1, 2, 3, 4}. Alternatively, the set of values K1 may also be the set of the union of the first set, the second set, and the third set. The third set is the K1 value set used before the RRC connection is established.

In addition to the set of values K1, optionally, the time domain resource allocation table may also be a union set of the first time domain resource allocation table and the second time domain resource allocation table. The first time domain resource allocation table is used for scheduling using a non-backup DCI, such as configured for each BWP using RRC signaling. The second time domain resource allocation table is used for scheduling using a standby DCI, such as configured using RMSI or a given system.

Case 2: The K1 value set and time domain resource allocation table that are configured using RRC signaling have a higher priority than the K1 value set and time domain resource allocation table that are configured using RMSI or set by the system. In other words, the K1 value set and the time domain resource allocation table that are configured using RRC signaling can replace the first K1 value set and the first time domain resource allocation table. Thus, it may be determined that the set of K1 values used by the HARQ-ACK codebook may be the first set, and/or the time domain resource allocation table used by the HARQ-ACK codebook may be the first time domain resource allocation table.

Case 3: It is determined that the set of K1 values and/or the time domain resource allocation table that are used in the specific cell or BWP feedback information is associated with the PDCCH search space configuration of the cell or BWP or the configuration of the DCIa format to be tracked, cells or bwp. For example, assuming only a certain common search space is configured for a particular cell or BWP (alternatively, especially in the case where inter-BWP scheduling or inter-carrier scheduling is not supported), there is no need to keep track of the DCI 1_1 format (because the DCI 1_1 format may be located only in a specific UE search space). In this case, the set of values K1 is the second set and/or the time domain resource allocation table is the second time domain resource allocation table. In another example, a UE specific search space is configured for a specific cell or BWP, in a specific UE search space, only the standby DCI needs to be monitored, and there is no need to monitor the DCI 1_1 format. In this case, the set of values K1 is the second set or the first set, and/or the time domain resource allocation table is the second time domain resource allocation table or the first time domain resource allocation table. For yet another example, only a specific UE search space is configured for a specific cell or BWP (alternatively, in particular in the case where inter-BWP scheduling or inter-carrier scheduling is not supported), only the backup DCI in a specific UE search space should be monitored, and there is no need to keep track of the backup DCI. In this case, a DL association set or cell or BWP feedback HARQ information is determined, provided that the K1 value set is the first set and/or the time domain resource allocation table is the first time domain resource allocation table.

In addition, the method may include:

transmission by the terminal device of the HARQ codebook to the base station.

In embodiments of the present invention, the time domain resource allocation information indicates a time domain resource occupied by the PDSCH. For example, the resource allocation information in the time domain includes a start symbol and a symbol length that correspond to the PDSCH used for downlink data transmission.

The scheduling type may be the first type and/or the second type. The first type may be referred to as type A (type A), and the second type may be referred to as type B (type B). For example, type A is typically used to transmit downlink data over the PDSCH using a slot as the minimum block. In particular, when the scheduling type is A, one slot usually corresponds to one PDSCH to transmit downlink data. Type B is typically used to transmit downlink data over the PDSCH using a non-slot, mini-slot, or symbol as the minimum block. In particular, when the scheduling type is B, one slot usually corresponds to a plurality of PDSCHs for downlink data transmission. In other words, one or more symbols may correspond to one PDSCH. The minimum block of the above scheduling type may be any time block as defined above. Alternatively, type A indicates that downlink data is transmitted over the PDSCH using a slot as the transmission granularity. Type B indicates that downlink data is transmitted over the PDSCH using a symbol as the transmission granularity.

The following specifically describes a specific implementation in which the terminal device determines the number of PDSCHs, as shown in Fig.2.

In all embodiments of the present invention, at least one PDSCH and at least one PDCCH may be located on one or more carriers.

The PDCCH period is assumed to be one slot (ie, the PDCCH must be monitored in each slot). The set of K1 values only includes the value 1, and the time domain resource allocation table is shown in Table 3.

Table 3

Index number
index K0 Start character Characters Scheduling type (PDSCH display type) 0 0 0 2 B one 0 four 2 B 2 0 eight 2 B 3 0 12 2 B

From Fig. 3, the value of K0 is 0. Assuming that the PUCCH corresponds to slot 2, the terminal may transmit the HARQ codebook via the PUCCH in slot 2 to the base station. The HARQ codebook is used by the terminal to indicate the downlink data reception status of the base station . Since the value of K1 is 1, the UCI in slot 2 may include feedback information of the downlink data transmitted via the PDSCH in slot 1. In addition, since the value set of K0 is 0, the PDCCH event in which the PDCCH may be used for scheduling that the PDSCH is alternatively located in slot 1. If the configured PDCCH monitoring pattern is that the terminal only needs to monitor the first symbol, the number of PDCCH events that the terminal should monitor is 1 (DCI can be used for scheduling the PDSCH in the PDCCH event, and the HARQ PDSCH codebook may be fed back to slot 2).

As shown in Table 3, since the scheduling type is type B, the HARQ codebook sent by the base station terminal in slot 2 may include feedback information corresponding to four PDSCH events (transmission in four mini-slots or out-of-slot transmission in slot 1) respectively corresponding to symbols 0 and 1, symbols 4 and 5, symbols 8 and 9, and symbols 12 and 13. In this case, the terminal needs to generate feedback HARQ information for four PDSCH events.

In particular, the terminal may generate X bits of feedback HARQ information for each PDSCH event, and X is the number of bits to be used for feedback for one PDSCH. For example, a transport block (TB) is a data block for transmission on the downlink. In a single TB or codebook configuration, one bit shall be used for feedback for one PDSCH (corresponding to the TB decode result). In a configuration of two TBs or codewords, no bundling operation is performed, two bits need to be used for feedback for one PDSCH (corresponding to the decoding result of the two TBs). In a configuration of two TBs or codewords, a bundling operation is performed, one bit shall be used for feedback for one PDSCH (corresponding to the decoding result of the two TBs and the result of the operation). The CBG feedback is configured and N bits are used for feedback for each TV. For example, it is assumed that the number of PDSCH events is 4 when one TB is configured, the number of HARQ codebook bits is 4, and when two TBs are configured and no merge operation is performed, the number of HARQ codebook bits is 8.

If the PDSCH transmission is monitored in the i-th PDSCH event, X bits of the feedback information generated based on the above method is at the corresponding location (eg, the i-th location). If the PDSCH transmission is not monitored, the corresponding location (eg, i-th location) is filled with a NACK of X bits by default.

Alternatively, the terminal determines the PDSCH event as follows.

Assuming that a plurality of rows in the time domain resource allocation table are rows in which the scheduling type is type A, it can be understood that one slot corresponds to one PDSCH event. Since only one PDSCH whose scheduling type is type A can be scheduled in one slot, the terminal allows the above plurality of types A to correspond to one PDSCH event. Specifically, as shown in Table 1, when the scheduling types corresponding to index numbers 0, 1, 3 each are A, three rows are counted as one PDSCH event. Alternatively, considering inter-slot scheduling, the number of PDSCHs whose scheduling type is type A in one slot may be the number of K0 values in rows in which the scheduling type is type A in the table. For example, the value of K0 in rows in which the scheduling type is type A in table 4 may be {0, 1}, and therefore the number of PDSCHs whose scheduling type is type A in two slots is 2.

There are many rows where the scheduling type is type B in the time domain resource allocation table. It is understood that one slot corresponds to multiple PDSCH events. If the PDSCH corresponding to the allocation of time block a is scheduled, alternatively, the PDSCH corresponding to the allocation of time block b, which overlaps the allocation of time block a, cannot be scheduled. Therefore, the terminal accumulates the number of PDSCHs whose scheduling type is type B when allocating time blocks that do not overlap. The time block allocation can be a duration spanning several characters. For example, the time blocks respectively corresponding to two PDSCHs are symbols 1-5 and symbols 1-8, and data is typically transmitted over one PDSCH in two time blocks. Therefore, the PDSCHs corresponding to symbols 1-5 and symbols 1-8, respectively, are counted as one PDSCH event.

The following describes four examples in which the PDSCH event is determined. However, this is not considered a limitation.

Example 1: The possible number of PDSCHs whose scheduling type is type B in one slot is the number of rows in which the leading characters differ, and the scheduling type of the event PDSCH is type B in the table. For example, in Table 4, if a PDSCH whose scheduling type is type A is configured, the number of PDSCHs whose scheduling type is type A is counted as only one, and the number of PDSCHs whose scheduling type is type B is three (respectively, corresponding to the start symbols 0, 4 and 8). Therefore, the possible number of PDSCHs in one slot is 4. First, codebook organization may be performed for a PDSCH whose scheduling type is type A, and then may be performed for a PDSCH whose scheduling type is type B, or vice versa. When organization of feedback HARQ information is performed for a PDSCH whose scheduling type is B type, organization may be performed based on PDSCH start symbols. For example, the organization of the PDSCH feedback information whose start symbol is 0 is performed first, and then the organization of the PDSCH feedback information whose start symbol is 4 is performed, and finally the organization of the PDSCH feedback information whose start symbol is 8 is performed.

Table 4

Index number
index K0 Start character Characters Scheduling type (PDSCH display type) 0 0 0 2 B one 0 0 four B 2 0 four 2 B 3 0 four 7 B four 0 eight 2 B 5 0 2 12 A 6 one 3 12 A

Example 2: The possible number of PDSCHs in rows in which the scheduling type is type B is counted and the seeds do not overlap. For example, in the table above, the rows in which the leading characters do not overlap are respectively: the corresponding row in which the index is 0, the row in which the index is 2, and the row in which the index is 4. Therefore, the number of PDSCHs, by the scheduling type of which type B is is counted as 3. Organization may be performed in the time order in which DCI is monitored, or may be performed in the time order in which PDSCH start symbols are monitored.

Example 3 Considering that multiple PDSCHs can be simultaneously used for transmission at the same moment, the simplest way is to count the number of PDSCH events in one slot as the number of rows in the resource allocation table in the time domain. The codebook is organized according to indexes corresponding to PDSCH events, for example, but not limited to, in ascending order. Specifically, the feedback HARQ information for the PDSCH whose index is 0 is ranked before the feedback HARQ information for the PDSCH whose index is 1 (if the PDSCH transmission whose index is i is not tracked, the location corresponding to index i is default filled with NACK) . Alternatively, if the terminal monitors the transmission of multiple PDSCHs with the same index (e.g., index is i) in the same slot, only the HARQ information of the PDSCH whose index is i and which is scheduled using the earliest DCI or latest DCI, are sent back to the location corresponding to index i, or only the feedback information of the PDSCH whose index is equal to i and which has the minimum or maximum index RB is returned to the location corresponding to index i. Therefore, it can ensure that the terminal and the base station have the same understanding of both the codebook organization and the information.

To reduce overhead, alternatively, the number of lines in which the scheduling type is type A may be counted as 1 (or not counted multiple times) or, alternatively, the number of lines in which the initial characters are the same and the number of characters (or SLIV) are the same, count as 1 (or not count again). Codebook organization is performed based on the minimum index value or maximum index value of the index values that are in the table and that correspond to the SLIV value, or the start symbol and symbol value (similarly, if necessary, if the terminal monitors the transmission of multiple PDSCHs with the same SLIV or the same start symbols and the same number of symbols in the same slot, only the HARQ PDSCH information scheduled using the earliest DCI or the latest DCI is returned to the corresponding location, or only the PDSCH feedback information with the minimum or maximum RB index is transmitted back to the corresponding location This can ensure that the terminal and the base station have the same understanding of both codebook organization and information). Alternatively, as an option, the number of lines in which the scheduling type is type A, the leading characters are the same, and the number of characters (or SLIV value) are the same are considered to be 1. A similar codebook organization rule is used, and details are not described here again; and/or alternatively, the number of lines where the scheduling type is type B, the leading characters are the same, and the number of characters (or SLIV value) are the same are counted as 1 (or not counted again). A similar codebook organization rule is used and the details are not described here again.

Example 4 Considering the processing complexity and feedback overhead of the terminal, it can be envisaged that a maximum number of X (X is a positive integer) PDSCHs (or PDSCHs whose scheduling type is type B) exist in one slot. In this case, the set of slots in which the PDSCH event exists is determined based on the set of K1 values. The number of PDSCH events in each slot in the set is X (or X + 1, assuming one type A is to be considered independently). Alternatively, the X pieces of feedback HARQ information in the feedback HARQ information in each slot correspond to the feedback information of the X PDSCHs (or X PDSCHs whose scheduling type is type B) in the slot that have a minimum SLIV value or a maximum SLIV value (in alternatively, if multiple SLIV values are the same, the same SLIV values are considered equal to one). If Y PDSCHs are monitored, Y is less than X (or X are monitored by PDSCHs whose scheduling type is type B), the X-Y locations are filled with NACKs accordingly. Alternatively, the X pieces of feedback HARQ information in the feedback HARQ information in each slot correspond to the feedback information of the X PDSCHs (or X PDSCHs whose scheduling type is type B) in the slot that have a minimum index value or a maximum index ( alternatively, if a plurality of strings in which the start symbols and/or end symbols corresponding to the indices are the same, the number of PDSCHs in the slot is considered to be only one, the maximum index value or the minimum index value is used as the index value). If Y PDSCHs are monitored and Y is less than X (or X PDSCHs whose scheduling type is type B are monitored), the X-Y locations are filled with NACKs accordingly. Alternatively, the X pieces of feedback HARQ information in the feedback HARQ information in each slot correspond to the feedback information of the X PDSCH events (or X PDSCHs whose scheduling type is type B) that are in the slot in which the data or DCI are the first (or last) to be monitored. If Y PDSCHs are monitored and Y is less than X (or X PDSCHs are monitored whose scheduling type is type B), the X-Y locations are filled with NACKs accordingly. Alternatively, the X pieces of feedback HARQ information in the feedback HARQ information in each slot correspond to the feedback information of the X PDSCHs (or X PDSCHs whose scheduling type is type B) that are in the slot and whose start symbol is the most the earliest or end symbol is the latest (alternatively, PDSCH events with the same start symbol or the same end symbol are counted as one). If Y PDSCHs are monitored and Y is less than X (or X PDSCHs whose scheduling type is type B are monitored), the X-Y locations are filled with NACKs accordingly.

It should be noted that for type B, the start symbol reference point may be the first symbol in the slot. Therefore, for the first row, the start symbol value is 0. In addition, for type B, the start symbol reference point can also be the first symbol of the resource set for PDCCH transmission. Therefore, for the first row, the value of the start symbol is 0. It is assumed that the first symbol of the resource set for PDCCH transmission can be 0 and 7, the first row corresponds to two possible PDSCH events, and the start symbols are respectively 0 + 0 and 0 + 7.

In this embodiment of the present invention, the HARQ codebook organizing sequence (PDSCH feedback information or PDSCH feedback information whose scheduling type is type B) can be determined based on the start location of the time block corresponding to the PDSCH or SLIV value (or the start location and length ), or a sequence of index values in a table. The starting locations can be in ascending order or in descending order. For example, that the organization sequence is determined in ascending order of start locations corresponding to the PDSCH is used as an example. For type B, it is assumed that there are three time blocks in one slot, each of which has a PDSCH, and the three time blocks are symbols 1-6, symbols 2-8, and symbols 10-12, respectively. In an implementation, the HARQ PDSCH codebook in symbols 1 to 6 is orchestrated, and then the HARQ PDSCH codebook in symbols 10 to 12 is orchestrated. HARQ codebook for PDSCH in symbols 10-12. The above HARQ codebook organizing sequence can be understood as the sequence in which the terminal device generates the HARQ Codebook or the sequence in which the base station obtains the HARQ Codebook. Alternatively, if a plurality of PDSCHs with the same start location, or a plurality of PDSCHs with the same SLIV value (or the same initial location and length) in a table, or a plurality of PDSCHs with the same index value in a table are tracked in one slot, only the PDSCH feedback information that is in the set of PDSCHs and which is scheduled using the earliest or latest tracked DCI is returned to the appropriate location. Alternatively, only the PDSCH feedback HARQ information which is in the plurality of PDSCHs and which is used for the earliest or latest transmission in the time domain or frequency domain is transmitted back to the corresponding location. In the above rule or method, it can be guaranteed that the receiving side and the transmitting side have the same understanding of the codebook size and organization, thereby improving communication reliability.

For example, the K1 value set and table are configured based on the BWP, and typically multiple BWPs may be configured for a single cell (or carrier). Therefore, one cell is used as an example, the total number Nc of PDSCH events for a cell is related to the BWP configuration/activation state. For example, a possible PDSCH event can be determined for each configured or activated BWP in the above manner. The PDSCH event may be a merge set or an intersection set of PDSCH BWP events configured or enabled for a cell. In another example, the K1 value set configured using RRC signaling is a pooling set or an intersection set of a K1 value set configured using RRC signaling or configured based on an activated BWP for a cell, the table configured using RRC signaling is a pooling set or an intersection set table configured using RRC signaling or configured based on the activated BWP for the cell, and then the PDSCH event for the cell is determined. In the case of multiple carriers, for the method of determining the event PDSCH and the feedback information of each cell, refer to the above description, the final feedback HARQ codebook may include feedback HARQ information of all cells configured or activated by the terminal. How to specifically organize the feedback HARQ information of each cell is not limited in the present invention.

Alternatively, in the above process of determining the PDSCH event K0 and the PDCCH period, the PDCCH monitoring offset and the PDCCH monitoring pattern may be further considered to ensure that the PDSCH event in which the PDCCH is used for scheduling is an effective PDSCH event, and HARQ information is returned. For example, for an event PDSCH in slot n, the value of K0 can only be 4, the PDCCH that is likely to schedule the PDSCH is located only in slot n - 4. Since, according to the configured PDCCH period and PDCCH monitoring offset, in slot n – 4 No PDCCH monitoring event. Therefore, slot n cannot be part of the DL association set.

In the case where the HARQ codebook is determined based on the number of PDSCHs, the possibility that a PDSCH is scheduled is considered. This helps the terminal to efficiently generate the HARQ Codebook to ensure normal communication with the base station.

According to another aspect, the above solution can also be applied to a scenario in which a plurality of PDSCHs correspond to one slot in order to realize flexible air interface scheduling.

Next, another embodiment of the present invention will be described, in this embodiment, the same or similar steps, functions, and explanations of terms similar to those described in the previous embodiments can be referred to the above embodiments. As shown in Fig. 3, the communication method includes the following steps:

301. Determine the number of PDSCHs based on the set of K1 values and the time domain resource allocation table.

302. Determine the number of PDCCHs.

303. Determine the HARQ Codebook based on the number of PDSCHs and the number of PDCCHs.

For example, the above determination step may be performed by a terminal device, a chip, or a communication device.

The time sequence of PDSCHs quantification and PDCCHs quantification is not limited in this embodiment of the present invention. In particular, the number of PDSCHs may be determined before, at the same time, or after the number of PDCCHs is determined.

In this embodiment of the present invention, for the steps of determining, by the terminal, the number of PDSCHs based on the set of K1 values and the time domain resource allocation table, see the specific description in the above embodiment. Details are not described here again.

For example, the terminal determines the number of PDCCHs based on any of the following:

a set of K1 values, a K0 value in the time domain resource allocation table, a PDCCH period, a PDCCH monitoring offset, and a PDCCH monitoring template. Specifically, the terminal determines the number of PDCCHs based on the K1 value set, the K0 value in the time domain resource allocation table, the PDCCH period, the PDCCH monitoring offset, and the PDCCH monitoring pattern.

With reference to FIG. 4, a specific implementation is described below in which a terminal determines the number of PDCCHs.

The PDCCH period is assumed to be one slot, the time domain resource allocation table is shown in FIG. 5, and the terminal can keep track of whether there is a PDCCH in each slot.

Table 5

index number index K0 Start character Characters Type of planning 0 0 2 ten A one one 3 eight A 2 2 four 7 A 3 3 2 ten A

As shown in FIG. 5, the value set K0 is {0, 1, 2, 3}, and the value set K1 is assumed to include only 1. When the terminal needs to send back the HARQ Codebook over the PUCCH corresponding to slot 4, since the value of K1 is 1, the HARQ codebook may include the HARQ information of the feedback data transmitted via the PDSCH in slot 3. Since the value of K0 is {0, 1, 2, 3}, it is assumed that the number of PDCCH events in each slot, determined based on the PDCCH monitoring pattern is 1, the number of PDCCH events in which the PDSCH in slot 3 can be scheduled is 4, and four PDCCH events are respectively slot 3 (K0 = 0), slot 2 (K0 = 0), slot 1 (K0 = 2) and slot 0 (K0 = 3). Therefore, the number of PDCCH events to be monitored by the terminal is 4.

In this case, the terminal must generate feedback HARQ information for four PDCCH events.

For example, the terminal may generate X bits of feedback HARQ information for each PDCCH event, and X is the number of bits to be used for feedback for one PDSCH. For example, a transport block (TB) is a data block for transmission on the downlink. In a single TB or codebook configuration, one bit shall be used for feedback for one PDSCH (corresponding to the TB decode result). In a configuration of two TBs or codewords, no combining operation is performed and two bits need to be used for feedback for one PDSCH (corresponding to the decoding result of two TBs). In the configuration of two TBs or codewords, a combining operation is performed and one bit must be used for feedback for one PDSCH (corresponding to the decoding result and the result of the two TBs). CBG feedback is configured and N bits are used for feedback for each TV. For example, it is assumed that the number of PDSCHs is 4 when one TB is configured, the number of HARQ codebook bits is 4, and when two TBs are configured and no merge operation is performed, the number of HARQ codebook bits is 8.

For the i-th PDCCH event, if the PDCCH that is used for scheduling PDSCH transmission is monitored (for example, DCIa 1_1 format or DCIa 1_0 format), X bits of the PDSCH feedback information of the scheduled DCI generated by the above method is at the corresponding location (for example, i-th location). If the PDCCH used to schedule the PDSCH for transmission is not monitored (eg, DCI format 1_1 or DCI format 1_0), the corresponding location (eg, i-th location) is filled with NACK X bits by default.

One possibility is that the terminal determines the HARQ codebook based on the number of PDCCHs. When the number of PDCCHs is greater than the number of PDSCHs, the air interface resource may be wasted. Therefore, this solution comprehensively considers the number of PDCCHs and the number of PDSCHs, which helps to efficiently return the HARQ codebook.

In addition, in this embodiment of the present invention, the terminal determines the cell feedback HARQ information based on a smaller value of min {number of PDSCHs, number of PDCCHs} in order to reduce the number of bits occupied by the HARQ codebook and reduce the air interface overhead.

For example, when the number of PDSCHs is less than the number of PDCCHs (or, more generally, the product of C and the number of PDSCHs is less than the product of S and the number of PDCCHs, and both S and C are real numbers), the communication device determines the HARQ codebook based on number of PDSCHs.

[0117] Alternatively, when the number of PDSCHs is greater than the number of PDCCHs (or, more generally, the product of C and the number of PDSCHs is greater than the product of S and the number of PDCCHs, and both S and C are real numbers), the communication device determines the codebook HARQ based on the number of PDCCHs.

[0118] Alternatively, when the number of PDSCHs is equal to the number of PDCCHs (or, more generally, the product of C and the number of PDSCHs is equal to the product of S and the number of PDCCHs, and S and C are real numbers), the communication device determines the HARQ codebook based on the number of PDSCHs or the number of PDCCHs.

Alternatively, the possibility that there are multiple DCI fragments in a single PDCCH event may be considered. For example, in a PDCCH event in slot 1, a PDSCH (K0 = 0) in slot 1 is scheduled using DCI 1, and a PDSCH (K0 = 1) in slot 2 is scheduled using DCI 2. For example, with a constraint, the maximum number of S (S is a positive integer) DCI DL fragments exist in one PDCCH event. HARQ codebooks of PDSCHs scheduled using S DCI tiles may be arranged according to the time sequence in which the PDSCH appears or the time sequence of the search space in which the DCI resides, e.g., in ascending order of search space numbers or in descending order of numbers. search spaces, where the search space numbers are base station signaling RRC configuration information. Specifically, the number of PDCCH events is determined as above, the HARQ feedback information for Si (it is assumed that there is a maximum Si of DCI fragments, Si of PDCCH events may be the same or different, for example, Si of PDCCH events in the first three symbols in one slot is greater than 1, Si PDCCH events in the remaining symbols in one slot is 1) PDSCHs are sent back in the i-th PDCCH event. The feedback information Si PDSCH may be organized in the above possible ways. If DCI Si-fragments are not tracked, the corresponding location is filled with NACK. Alternatively, when inter-slot scheduling is considered, the number S of DCI fragments in one PDCCH event may be the number of K0 values in the table. For example, the values of K0 in rows in which the scheduling type is type A in table 1 may be {0, 1}, the number S of DCI fragments in one PDCCH event is 2.

In any embodiment of the present invention, as an option, when the number of PDCCHs and/or the number of PDSCHs are determined, information about the slot format (slot format) can be additionally considered. For example, when the time block configuration is such as a slot or a symbol is an uplink transmission, the PDCCH and/or the PDSCH corresponding to the time block are not counted in the number of PDCCHs and/or in the number of PDSCHs.

In another possible implementation of the present invention, the HARQ codebook is determined based on the PDCCH monitoring event. For the process and method, refer to the preceding description. Details are not described here again.

The following describes another embodiment of the present invention, in this embodiment, for the same or similar steps, functions, and explanations of terms similar to the previous embodiments, the above embodiments are referred to. The communication method includes that a semi-static codebook method can be used for slot transmission (in other words, transmission on a PDSCH whose scheduling type is type A). The feedback information of the semi-static codebook may be referred to as codebook 1. In particular, the semi-static codebook may be determined based on the number of PDSCHs, or may be determined by further combining the number of PDCCHs, in other words, at least {number of PDCCHs, number of PDSCHs} is determined.

Alternatively, for transmission without slots (in other words, for transmission on a PDSCH whose scheduling type is type B), a dynamic codebook method may be used. The dynamic codebook feedback information may be referred to as codebook 2.

The following specifically describes a method for determining a dynamic HARQ codebook.

In this embodiment of the present invention, the dynamic HARQ codebook may be determined based on the number of PDSCHs actually scheduled. For example, the feedback HARQ information may be determined based on a total downlink assignment index (T-DAI) and a downlink counter assignment index (C-DAI). In addition, the base station may transmit the DCI to the terminal, and the DCI includes the first information and/or the second information.

For example, T-DAI may be the total number of {carrier, PDCCH monitoring event} pairs scheduled by the PDCCH, or the total number of PDSCHs up to the current time or PDCCH monitoring event. The C-DAI may be the cumulative number of {carrier, PDCCH monitoring event} pairs scheduled by the PDCCH, or the cumulative number of PDSCHs until the current time or PDCCH monitoring event.

As shown in FIG. 6, assuming that the base station configures five carriers, each carrier can be understood as a frequency domain resource. The HARQ time window is assumed to include four time blocks, the carriers corresponding to the first time block to the fourth time block in the time window. Specifically, the grid having "D(m, n)" represents a time block in which downlink data is transmitted via the PDSCH. The PDSCH or time block is scheduled using DCI D(m, n). m is the DCI Total-DAI value used for time block or PDSCH scheduling, and n is the DCI Counter-DAI value used for time block or PDSCH scheduling. It is assumed that PDSCH or downlink data scheduled using DCI D(1, 1), D(3, 2), D(4, 4), D(6, 6) is correctly received at the receive side, and the data PDSCH or downlink scheduled using DCI D(3, 3) is incorrectly received at the receive side. Therefore, the receiving device does not control DCI D (6, 5). Since data is only scheduled on carrier 1 in the first time block, so T - DAI = 1 and C - DAI = 1. In the second time block, data is transmitted on each of carrier 0 and carrier 3, and data transmission in the first time block is considered, so T-DAI = 3, C-DAI = 2 on carrier 0, and C-DAI = 3 on carrier 2. T-DAI and C-DAI in the third and fourth time blocks can be sequentially received.

It is assumed that one PDSCH includes only one TB, the HARQ codebook of one bit must be returned for one TB of one PDSCH, it is determined that the final HARQ codebook is 6 bits based on this final T-DAI tracked in the time window is 6 For example, if 1 represents ACK and 0 represents NACK, the HARQ codebook is 110101. Since the receiving side does not keep track of DCI D(6, 5), the receiving side can display feedback information. PDSCH scheduled using tracked DCI for the location corresponding to C-DAI, and the remaining locations in which information is not filled can be filled with NACKs (in other words, location corresponding to C-DAI = 5).

The lack of downlink data can be monitored in the above manner to avoid the disadvantage that the base station and the terminal have different understandings of the HARQ codebook.

For example, the number of PDSCHs or TBs corresponding to the PDCCH may be counted in sequence first in the frequency domain and then in the time domain. For example, T-DAI and C-DAI are counted in sequence first over the frequency domain and then over the time domain. In particular, D(1, 1) corresponds to the first bit of the HARQ codebook, D(3, 2) corresponds to the second bit of the HARQ codebook, and so on.

Table 6

carrier number First time block Second time block Third time block Fourth time block CC0 D(3, 2) is correct CC1 D(1, 1) is correct D(4, 4) is correct D (6, 5) missing CC2 D(3, 3) incorrect D(6, 6) is correct CC3 CC4

In this embodiment, for slot transmission (in other words, PDSCH mapping type A), codebook 1 is determined in a semi-static codebook method. In particular, codebook 1 may be determined based on any of the above embodiments.

For slotless transmission (in other words, PDSCH mapping type B), codebook 2 is determined by a dynamic codebook method.

For example, the HARQ codebook returned by the base station terminal may include codebook 1 and/or codebook 2. In particular, if only type A exists in the time domain resource table configured using RRC signaling, only codebook 1 should be returned. If type A and type B both exist in a time domain resource table configured using RRC signaling, and a PDSCH whose scheduling type is type B is not scheduled, only codebook 1 only needs to be sent back. time domain configured using RRC signaling, only type B exists, then only codebook 2 shall be returned. If type A and type B both exist in the time domain resource allocation table configured using RRC signaling and PDSCH, scheduling type whose type B is scheduled, both codebook 1 and codebook 2 are returned.

For example, when the codebook type configured using RRC signaling is a semi-static codebook, the semi-static codebook (note that only Type A is defined for determining the PDSCH of an event) is determined based on any of the preceding embodiments. In other words, the semi-static codebook typically only includes a HARQ PDSCH Codebook whose scheduling type is type A, or when the codebook type configured using RRC signaling is semi-static codebook, there is no configuration for type B for all BWPs corresponding to to all cells in the PUCCH cell group. If type B exists in the time domain resource table for at least one BWP for at least one cell, alternatively, the codebook returned by the terminal may or may not further include codebook 2. In particular, codebook 2 is a dynamic codebook. Alternatively, the DCI used to schedule the aforementioned BWP may include a DAI field. Alternatively, the semi-static codebook may not include the HARQ PDSCH Codebook in the above BWP or cell.

In this embodiment of the present invention, it is generally considered that since a PDSCH whose scheduling type is Type B is used, the number of possible PDSCH events can be large. When using the semi-static codebook method, the feedback overhead is excessively high. Therefore, only the dynamic codebook is limited to use for type B, so that the feedback overhead is reduced.

Next, another embodiment of the present invention will be described, in this embodiment, for the same or similar steps, functions, and explanations of terms similar to the previous embodiment, the above embodiments are referred to. As shown in Fig. 5, the communication method includes the following steps:

501. Determine the number of PDSCHs based on the set of K1 values and the time domain resource allocation table.

502. Determine the HARQ codebook based on the number of PDSCHs and the number of processes.

For example, the above determination steps may be performed by a terminal device, a chip, or a communications device.

In this embodiment of the present invention, the terminal determines the HARQ Codebook using the smaller value between the number of PDSCHs and the number of processes.

Specifically, the terminal determines, based on the set of K1 values and the time domain resource allocation table, that the possible number of PDSCH events in cell c is Nc. For a specific process, refer to the above embodiments.

The terminal determines, based on the RRC signaling configuration, that the number of processes in cell c is Pc (eg, the value may be 2, 4, 6, 8, 10, 12, or 16).

If Nc≤Pc (or, more generally, can be written as Nc≤a * Pc + b, and a and b may be predefined using a protocol or may be configured using signaling), the semi-static cell codebook size c determined based on Nc. For a specific process for determining feedback HARQ information, see the above embodiments.

If Nc≥Pc (or, more generally, can be written as Nc≥a * Pc + b, and a and b can be predetermined using the protocol and can be configured using signaling), the size of the semi-static codebook of cell c is determined by based on PC.

If Nc≤Pc, for the codebook generation process, refer to the embodiment in the HARQ codebook is determined based on the PDSCH.

If Nc≥Pc, a possible codebook matching method is as follows. If the DCI used for PDSCH scheduling is monitored in the PDSCH candidate event defined in the previous embodiment, and the process number of the monitored DCI is i (0 <= i <Pc), X bits of the PDSCH feedback HARQ information is placed in the i location. If a DCI whose process number is i is not tracked, the i-th default location is filled with a NACK of X bits.

If multiple PDSCHs scheduled using DCI whose process number is i are monitored, the PDSCH feedback HARQ information scheduled using the earliest or latest DCI that is monitored by the terminal and whose process number is i is at i location of the HARQ codebook . Alternatively, if multiple PDSCHs scheduled using a DCI whose process is i are monitored, the HARQ PDSCH codebook feedback information scheduled using the earliest or latest DCI that is monitored by the terminal and whose process number is i is at i HARQ codebook location.

For example, when the codebook type configured using RRC signaling is a semi-static codebook, if type B exists in the time domain resource allocation table of at least one BWP of at least one cell in the cell group, the HARQ codebook for cells and/or BWP is determined based on the number of configured processes, and the codebook for the remaining cells is determined based on the event PDSCH. Alternatively, the codebooks of all cells in the cell group are determined based on the number of configured processes.

In the above embodiments, multiple BWPs are configured for one cell, each BWP has multiple K1 values, and multiple PDSCH events exist in one slot. Therefore, finally, the number of PDSCH events used to send back a HARQ-ACK over one PUCCH may be greater than the number Pc of processes configured using RRC signaling. In this case, it is clear that the actual number of scheduled PDSCHs does not exceed Pc (because each PDSCH can only correspond to one process number for the same process number, because whether the data corresponding to the process number is initial transmission data or retransmission data, is unknown, each PDSCH may not normally carry other data until a HARQ feedback-ACK is received). Therefore, the feedback overhead in this solution can be reduced.

Similarly, in another embodiment of the present invention, the HARQ codebook may also be determined based on the event PDCCH and the number of processes. The specific implementation is similar to determining the HARQ codebook based on the PDSCH event and the number of processes, provided that the PDCCH event is replaced with a PDSCH event.

In the case where the HARQ codebook is determined based on the number of processes and the number of PDSCHs or the number of PDCCHs, the possibility that the PDSCH is scheduled and the status of the process are comprehensively considered. This helps the terminal to efficiently generate the HARQ Codebook and ensures normal communication with the base station.

In another aspect, the scenario of multiple cells or BWPs is considered in the above solution, thereby realizing flexible air interface scheduling.

For example, FIG. 6 shows a block diagram of a communication device 600. Communication device 600 may be a device in embodiments of the present invention, in particular, it may be a chip, a base station, a terminal device, a communication device, or a network device.

Communications device 600 includes one or more processors 601. Processor 601 may be a general purpose processor, a special purpose processor, or the like, such as a baseband processor or a central processing unit, for example. The baseband processor may be configured to process the communication protocol and communication data, and the CPU may be configured to control a communication device (such as a base station, terminal device, or chip), execute a software program, and process software data.

In an exemplary implementation, communication device 600 may include one or more modules. One or more modules may be implemented by one or more processors, or may be implemented by one or more processors and memory.

In an exemplary implementation, communication device 600 includes one or more processors 601. One or more processors 601 may implement processing functions such as determining the number of PDSCHs, the number of PDCCHs, and/or the HARQ codebook. In another possible implementation, the processor 601 may further implement other functions in addition to the above functions.

Alternatively, in an implementation, processor 601 may include an instruction 603 (sometimes also referred to as code or program). The instruction may be executed on the processor, and the communication device 600 may perform the method described in the previous embodiments. In yet another possible embodiment, the communication device 600 may also include a circuit, and the circuit may implement the processing functions in the previous embodiments, such as determining the number of PDSCHs, the number of PDCCHs, and/or the HARQ Codebook.

Alternatively, in an implementation, the communication device 600 may include one or more memories 602. For example, the memory 602 may store an instruction 604. The instruction may be executed on a processor and the communication device 600 is configured to perform the method described in the preceding method embodiments. .

Alternatively, the memory may additionally store data. Alternatively, the processor may also store an instruction and/or data. The processor and memory may be located separately or may be combined together.

Alternatively, the communication device 600 may further include a transceiver 605 and an antenna 606. The processor 601 may be referred to as a processing unit and is configured to control the communication device (terminal device or base station). The transceiver 605 may be referred to as a transceiver unit, a transceiver, or a transceiver circuit and is configured to perform the function of a transceiver of a communication device using the antenna 606.

Alternatively, the communication device 600 may further include a decoder configured to perform decoding or a modulator configured to perform modulation processing. The functions of these components may be implemented using one or more processors 601.

Alternatively, the communication device 600 may further include an encoder configured to perform encoding, a decoder configured to perform decoding, and the like. The functions of these components may be implemented using one or more processors 601.

The foregoing mainly describes the solutions provided in the embodiments of the present invention in terms of method. It is understood that in order to implement the above functions, the communication device or network device includes an appropriate hardware structure and/or software module to perform each function. One skilled in the art will readily appreciate that, in conjunction with the examples described in the embodiments disclosed in this specification, the steps of the algorithms may be implemented in hardware or a combination of hardware and computer software. Whether the function is performed by hardware or by hardware controlled by computer software depends on the specific applications and design constraints of the technical solutions. A person skilled in the art may use different methods to implement the described functions for each particular application, but the implementation should not be considered outside the scope of the present invention.

In embodiments of the present invention, separation of functional modules may be performed for the communication device and the network device in accordance with the above method examples. For example, functional modules may be separated according to functions, or two or more functions may be integrated into one processing module. An integrated module may be implemented in hardware or may be implemented in a software function module. It should be noted that in the embodiments of the present invention, the separation of modules is an example and is simply a logical separation of functions. The actual implementation may use a different partitioning method.

In the case where the functional modules are separated based on the respective functions, Fig. 7 shows a diagram of the possible composition of the device in the above embodiments of the method of the present invention. The device is a terminal device, a communication device, or a chip in the above embodiments. As shown in Fig.7, the device 700 may include a module 71 processing. Alternatively, device 700 may further include a receive module 72 and/or a transmit module 73. In this embodiment, for the same or similar steps, functions, and explanations of terms similar to the above embodiments, the above embodiments are referred to.

In some embodiments, processing unit 71 may be configured to determine the number of physical downlink PDSCHs based on a set of K1 values and a time domain resource allocation table; and determine the HARQ Codebook based on the number of PDSCHs and the number of PDCCHs.

In some embodiments, the processing unit 71 determines the number of PDCCHs based on the set of K1 values, the K0 value in the time domain resource allocation table, the PDCCH period of the physical downlink control channel, the PDCCH monitoring offset, and the PDCCH monitoring pattern.

In some embodiments, receive unit 72 is configured to receive a set of K1 values, a time domain resource allocation table, a PDCCH period of a physical downlink control channel, a PDCCH monitoring offset, and a PDCCH monitoring pattern.

In some embodiments, processing unit 71 is configured to determine the number of PDSCHs (or referred to as a set of DL associations) based on a set of K1 values and a time domain resource allocation table; and determine the HARQ codebook based on the number of PDSCHs.

In some embodiments, the receive unit 72 is configured to receive a set of K1 values and a time domain resource allocation table.

In some embodiments, processing unit 71 is configured to determine the number of PDSCHs (or referred to as a set of DL associations) based on a set of K1 values and a time domain resource allocation table; and determine the HARQ Codebook based on the number of PDSCHs and the number of processes.

In some embodiments, transmit unit 73 is configured to transmit a dynamic HARQ codebook Codebook when the PDSCH corresponds to the first type, or transmit a semi-static HARQ codebook Codebook when the PDSCH corresponds to the second type.

In some embodiments, apparatus 700 may further include an accumulator configured to: when there are a plurality of first types, it is determined by accumulation that the number of PDSCHs corresponding to the plurality of first types is 1; and when there are a plurality of second types, accumulate the number of PDSCHs whose scheduling type is the second type and whose time blocks do not overlap.

In addition, the processing unit 71 may be configured to support the device 700 while performing the steps of determining, for example, determining the HARQ codebook, the number of PDCCHs, and/or the number of PDSCHs in FIG. 1, FIG. 3, or FIG. 5 in the method embodiments. In addition, the various blocks in Fig. 7 can also be used in another process of the technology described in the description.

It should be noted that for all related content of the various steps according to the above method embodiments, refer to the function descriptions of the respective functional modules. Details are not described here again.

The device provided in the embodiments of the present invention is configured to perform the above communication method. Therefore, the same effects as in the previous communication method can be achieved.

In another embodiment, one of skill in the art would appreciate that the module in device 700 corresponds to the component in FIG. Device 700 may be implemented using the structure shown in FIG.

The above descriptions of implementations will enable one skilled in the art to understand that for the purposes of convenient and concise description, the division of the above functional modules is used as an example for illustration. In actual application, the above functions can be allocated to different modules and implemented according to the requirement, that is, the internal structure of the device is divided into different functional modules to implement all or some of the functions described above.

In several embodiments presented in the present invention, it should be understood that the disclosed device and method can be implemented in other ways. For example, the device embodiment described is merely an example. For example, a division of a module or block is simply a division of a logical function, and may be another division in the actual implementation. For example, many blocks or components may be combined or integrated into another device, or certain functions may be ignored or not performed. Additionally, displayed or discussed reciprocal links or direct links or link connections can be implemented using some interfaces. Indirect connections or communication connections between devices or units may be implemented in electronic, mechanical or other forms.

Blocks described as separate parts may or may not be physically separate, and parts displayed as blocks may be one or more physical blocks, may be located in the same location, or may be distributed in different locations. Some or all of the blocks may be selected based on actual requirements to achieve the goals of the solutions of the embodiments.

Additionally, the functional blocks in the embodiments of the present invention may be integrated into a single processing unit, or each of the units may physically exist separately, or two or more units may be integrated into one unit. An integrated block may be implemented in the form of hardware or may be implemented in the form of a software function block.

When an integrated block is implemented in the form of a software function block and sold or used as a standalone product, the integrated block may be stored on a readable storage medium. Based on such an understanding, the technical solutions of the present invention, essentially, or part contributing to the prior art, or all or some of the technical solutions can be implemented in the form of a software product. The software product is stored on a storage medium and includes several instructions for instructing a device (which may be a single-chip microcomputer, a microcircuit, etc.) or a processor to perform all or some of the steps of the methods described in the embodiments of the present application. The above storage media includes: any media that can store program code, such as USB flash drive, removable hard disk, read-only memory (ROM), random access memory (RAM) magnetic disc or optical disc.

The above descriptions are merely specific implementations of the present invention, but are not intended to limit the protection scope of the present invention. Any modification or replacement within the technical scope disclosed in the present invention should be within the protection scope of the present invention. Therefore, the protection scope of the present invention should be protected by the claims.

Claims (94)

1. A communication method comprising the steps of determining a downlink common physical channel (PDSCH) event based on the set of K1 values and the resource allocation information in the time domain, and determining hybrid automatic repeat request (HARQ) feedback information based on the PDSCH event, wherein the K1 value set contains a timing relationship set between downlink data transmission and HARQ feedback information, and the K1 value set is correlated with a downlink control information (DCI) format. 2. The method according to claim 1, wherein the set of values K1 is correlated with the DCI format, in particular, comprises: if the standby DCI is configured for monitoring and the non-standby DCI is not configured for monitoring, the K1 value set is the second set. 3. The method according to claim 1 or 2, further comprising stages in which monitor only the standby DCI in the search space, and determine that the set of values K1 is the second set based on the backup DCI, while the search space is at least one of the general search space and the specific search space. 4. The method according to claim 2 or 3, in which the second set is given. 5. A method according to any one of claims 1 to 4, wherein that the set of K1 values is correlated with the DCI format, in particular, comprises: if the non-backup DCI is configured to be monitored, the K1 value set is the first set. 6. The method according to any one of claims 1 to 5, further comprising steps in which monitor non-backup DCI in a particular search space, and determining, based on the non-backup DCI, that the set of K1 values is the first set. 7. The method according to claim 5 or 6, further comprising the step of receiving an RRC radio resource control signaling, the RRC signaling comprising a first set. 8. The method according to any one of claims 2-7, in which the non-backup DCI is the DCI 1_1 format and the backup DCI is the DCI 1_0 format. 9. A communication method comprising the steps of configure the search space and the set of values K1 and transmit information about the allocation of resources in the time domain to the communication device, while the K1 value set contains a timing relationship set between downlink data transmission and HARQ feedback information, and the K1 value set is correlated with the DCI downlink control information format. 10. The method according to claim 9, wherein the set of K1 values is correlated with the DCI format, in particular, comprises: if a standby DCI is configured and non-standby DCI configuration for the communication device is skipped, the set of K1 values is the second set. 11. The method according to claim 9 or 10, further comprising the step of configuring the communication device to monitor only the standby DCI in the search space, with the set of K1 values being the second set, and the search space is at least one of the general search space and the specific search space. 12. The method according to claim 10 or 11, in which the second set is given. 13. The method according to any one of claims 9-12, wherein, that the set of K1 values is correlated with the DCI format, in particular, comprises: if non-redundant DCI is configured for the communication device, the K1 value set is the first set. 14. The method according to any one of claims 9 to 13, further comprising the step of configuring the communication device to monitor the non-backup DCI in the search space, wherein the value of K1 is the first set and the search space is a specific search space. 15. The method according to claim 13 or 14, further comprising the step of transmitting the RRC radio resource control signaling to the communication device, wherein the RRC signaling comprises the first set. 16. The method according to any one of claims 10-15, in which the non-backup DCI is the DCI 1_1 format and the backup DCI is the DCI 1_0 format. 17. The method according to any one of claims 9-16, in which a set of K1 values and resource allocation information in the time domain are used to determine a physical downlink shared channel (PDSCH) event, and The PDSCH event is used to determine the HARQ feedback information. 18. Terminal communication device containing a processing unit configured to determine a physical downlink shared channel (PDSCH) event based on a set of K1 values and time domain resource allocation information, wherein the processing unit is further configured to determine hybrid automatic repeat request (HARQ) feedback information based on the PDSCH of the event, and the K1 value set contains a timing relationship set between downlink data transmission and feedback HARQ information, and the K1 value set is correlated with a downlink control information (DCI) format. 19. The terminal device according to claim 18, in which the device further comprises a receive unit, whereby the set of values K1 is correlated with the DCI format, in particular, contains: if the receive unit is configured to monitor the standby DCI and is not configured to monitor the non-standby DCI, the set of K1 values is the second set. 20. The terminal device according to claim 18 or 19, in which the device further comprises a receiving unit configured to monitor only the standby DCI in the search space, wherein the processing unit is further configured to determine, based on the back-up DCI, that the set of K1 values is the second set, wherein the search space is at least one of the general search space and the specific search space. 21. The terminal device according to claim 19 or 20, in which the second set is given. 22. The terminal device according to any one of claims 18-21, in which the device further comprises a receiving unit, wherein that the set of K1 values correlated with the DCI format, in particular, contains: if the receive unit is configured to monitor a non-backup DCI, the set of K1 values is the first set. 23. The terminal device according to any one of claims 18-22, in which the device further comprises a receiving unit configured to monitor a non-backup DCI in a particular search space, wherein the processing unit is further configured to determine, based on the non-backup DCI, that the value of K1 is the first set. 24. The terminal device according to claim 22 or 23, in which the receiving unit is further configured to receiving radio resource control (RRC) signaling, the RRC signaling comprising the first set. 25. The terminal device according to any one of claims 18-24, in which the non-backup DCI is the DCI 1_1 format and the backup DCI is the DCI 1_0 format. 26. Base station containing a processing unit configured to configure a search space and a set of values K1, and a transmission unit configured to transmit resource allocation information in the time domain to the communication device, wherein a set of K1 values contains a set of timing relationships between downlink data transmission and feedback HARQ information, and a set of K1 values correlates with a DCI downlink control information format. 27. The base station of claim 26, wherein the processing unit is further configured to configuring a standby DCI; and skipping configuring a non-standby DCI for the communication device, with the set of K1 values being the second set. 28. The base station according to claim 26 or 27, in which the transmission unit is further configured to configuring the communication device to monitor only the standby DCI in the search space, with the set of K1 values being the second set, and the search space is at least one of the general search space and the specific search space. 29. The base station according to claim 27 or 28, in which the second set is given. 30. The base station according to any one of claims 26-29, wherein the processing unit is further configured to configuring a non-backup DCI for the communication device, with the set of K1 values being the first set. 31. The base station according to any one of claims 26-30, wherein the transmission unit is further configured to configuring the communication device to monitor the non-backup DCI in the search space, wherein the value of K1 is the first set and the search space is a specific search space. 32. The base station according to claim 30 or 31, in which the transmission unit is further configured to transmitting radio resource control (RRC) signaling to the communication device, wherein the RRC signaling comprises a first set. 33. The base station according to any one of claims 27-32, in which the non-backup DCI is the DCI 1_1 format and the backup DCI is the DCI 1_0 format. 34. The base station according to any one of claims 26-33, in which the set of K1 values and the resource allocation information in the time domain are used to determine the PDSCH physical downlink shared channel event, and The PDSCH event is used to determine the HARQ feedback information. 35. A terminal device comprising at least one processor and at least one memory, wherein the processor is configured to implement the communication method of any one of claims 1 to 8, wherein the memory is coupled to the processor. 36. A base station comprising a processor, memory, and instructions stored in the memory and executed by the processor, wherein the instructions, when executed, cause the processor to execute the method of any one of claims 9-17. 37. A communication system comprising a terminal device according to claim 35 and a base station according to claim 36. 38. A computer-readable storage medium containing instructions causing, when executed by a computer, the computer to execute a method according to any one of claims 1-8. 39. A computer-readable storage medium containing instructions causing, when executed by a computer, said computer to execute a method according to any one of claims 9-17.

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