CN113162740A

CN113162740A - Transmission method of control signaling and equipment thereof

Info

Publication number: CN113162740A
Application number: CN202010820339.1A
Authority: CN
Inventors: 张飒; 王轶; 孙霏菲
Original assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Current assignee: Beijing Samsung Telecom R&D Center; Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Priority date: 2020-01-22
Filing date: 2020-08-14
Publication date: 2021-07-23

Abstract

There is provided a method performed by a second class of transceiving nodes in a wireless communication system, comprising receiving first class data and/or first class control signalling from a first class of transceiving nodes; determining a hybrid automatic repeat request-acknowledgement (HARQ-ACK) codebook and a time unit for transmitting the HARQ-ACK codebook based on the first type of data and/or the first type of control signaling; and transmitting the HARQ-ACK codebook to the first type transceiving node in the determined time unit.

Description

Transmission method of control signaling and equipment thereof

Technical Field

The present application relates to a wireless communication technology, and in particular, to a transmission method of a control signaling and a device thereof.

Background

With the rapid development of the information industry, especially the growing demand from the mobile internet and internet of things (IoT), the future mobile communication technology is challenged with unprecedented challenges. As reported by the International Telecommunications Union (ITU) under ITU-R M [ imt. beam 2020. transfic ], it is expected that by 2020, mobile TRAFFIC will increase nearly 1000 times and the number of user equipment connections will also exceed 170 billion compared to 2010 (4G era), and as the vast number of IoT devices gradually permeates into mobile communication networks, the number of connected devices will be more dramatic. To address this unprecedented challenge, the communications industry and academia have developed extensive fifth-generation mobile communications technology (5G) research. Future 5G frameworks and overall goals are currently discussed in ITU's report ITU-R M [ imt.vision ], wherein the 5G demand landscape, application scenarios and various important performance indicators are specified. For the new requirements in 5G, ITU's report ITU-R M [ imt. user TECHNOLOGY TRENDS ] provides information related to the technical trend for 5G, aiming at solving significant problems of significant improvement of system throughput, consistency of user experience, scalability to support IoT, latency, energy efficiency, cost, network flexibility, support of emerging services, and flexible spectrum utilization. In 3GPP, work on the first phase of 5G is already in progress.

Disclosure of Invention

According to an aspect of the present invention, there is provided a method performed by a second type of transceiving node in a wireless communication system, comprising receiving a first type of data and/or a first type of control signaling from a first type of transceiving node; determining a hybrid automatic repeat request-acknowledgement (HARQ-ACK) codebook and a time unit for transmitting the HARQ-ACK codebook based on the first type of data and/or the first type of control signaling; and transmitting the HARQ-ACK codebook to the first type transceiving node in the determined time unit.

Optionally, the HARQ-ACK codebook is configured, through protocol specification or higher layer signaling, to include HARQ-ACK information of a first type of control signaling indicating a semi-persistent scheduling SPS physical downlink shared channel PDSCH release.

Optionally, the HARQ-ACK information of the first type of control signaling indicating the SPS PDSCH release is indicated by adding 1 bit after or before the HARQ-ACK codebook.

Optionally, the number of bits of HARQ-ACK information of the first type of control signaling indicating SPS PDSCH release is determined for each serving cell based on one of: the method includes the steps of protocol specification or higher layer signaling configuration, the number of the one or more SPS PDSCHs of the serving cell, the number of the one or more SPS PDSCHs release indicating configuration of the serving cell, and the number of bits of the domain indicating the HARQ process in the first type of control signaling of the serving cell.

Optionally, the number of bits of HARQ-ACK information of the first type of control signaling indicating SPS PDSCH release is configured to be Q for each serving cell through higher layer signaling, indicating that the latest Q HARQ-ACK information of the first type of control signaling indicating SPS PDSCH release received before the HARQ-ACK codebook is transmitted, where the Q is the same or different for each serving cell.

Optionally, the HARQ-ACK information of the first type of control signaling indicating the SPS PDSCH release is located in one of the following positions: after or before the HARQ-ACK information of each HARQ process of each serving cell, and after or before the HARQ-ACK information of each HARQ process of all serving cells.

Optionally, the HARQ-ACK information of the first type of control signaling indicating the SPS PDSCH release is ordered according to the number of the serving cell and/or the number of the SPS PDSCH configuration.

Optionally, the time interval between the time unit of receiving the first type of control signaling indicating the SPS PDSCH release and the time unit determined for transmitting the HARQ-ACK information HARQ-ACK codebook containing the first type of control signaling indicating the SPS PDSCH release is configured by protocol specification or higher layer signaling.

Optionally, the time interval is not greater than X slots or sub-slots or orthogonal frequency division multiplexing, OFDM, symbols, or not less than Y slots or sub-slots or OFDM symbols.

Optionally, the HARQ-ACK information corresponding to the HARQ-ACK information of the first type of control signaling indicating the SPS PDSCH release is calculated through protocol specification or higher layer signaling configuration or through a formula, and the HARQ-ACK information of the first type of control signaling indicating the SPS PDSCH release is used to replace the HARQ-ACK information of the corresponding HARQ process in the HARQ codebook.

Optionally, the second type of transceiving node determines whether to trigger transmission of HARQ-ACK codebooks for all configured HARQ processes based on the 1-bit indication in the first type of control signaling.

Optionally, in a case that the first type of control signaling is scrambled by a radio network temporary identity RNTI for dynamic data scheduling, the second type of transceiving node determines whether the first type of control signaling schedules the PDSCH simultaneously based on a frequency domain resource allocation domain in the first type of control signaling.

Optionally, when the frequency domain resource allocation domain indicates valid frequency domain resources, the second type of transceiving node determines that the PDSCH is scheduled by the first type of control signaling at the same time; and when the frequency domain resource allocation domain indicates invalid frequency domain resources, the second type of transceiving node determines that the first type of control signaling does not schedule the PDSCH.

According to an aspect of the present invention, there is provided a second type transceiving node in a wireless communication system, comprising: a transceiver configured to: receiving first type data and/or first type control signaling from a first type transceiving node; and transmitting the HARQ-ACK codebook to the first type transceiving node in a time unit; a controller configured to control overall operation of the second type of transceiving node, comprising: determining a HARQ-ACK codebook and the time unit for transmitting the HARQ-ACK codebook based on the first type data and/or the first type control signaling; and controlling the transceiver to transmit the HARQ-ACK codebook to the first type transceiving node in the determined time unit.

According to an aspect of the invention, there is provided a method performed by a first type of transceiving node in a wireless communication system, comprising: sending first-class data and/or first-class control signaling to a second-class transceiving node; receiving a HARQ-ACK codebook from a second type of transceiving node in a time unit; wherein the HARQ-ACK codebook and the time unit are determined by the second type transceiving node based on the received first type data and/or first type control signaling.

According to an aspect of the present invention, there is provided a first type transceiving node in a wireless communication system, the first type transceiving node comprising: a transceiver configured to transmit first type data and/or first type control signaling to a second type transceiving node and to receive a HARQ-ACK codebook from the second type transceiving node in a time unit; and a controller configured to control overall operation of the first type of transceiving node, including: the control transceiver sends first type data and/or first type control signaling to the second type transceiving nodes and receives HARQ-ACK codebooks from the second type transceiving nodes in the time unit; wherein the HARQ-ACK codebook and the time unit are determined by the second type transceiving node based on the received first type data and/or first type control signaling.

Drawings

The foregoing and additional aspects and advantages of the present application will become more apparent and readily appreciated from the following description, taken in conjunction with the accompanying drawings, wherein:

fig. 1 shows a block diagram of a second type of transceiving node according to an embodiment of the present invention;

fig. 2 shows a flow diagram of a method performed by a UE according to one embodiment of the invention;

fig. 3 shows a block diagram of a transceiving node of a first type according to an embodiment of the present invention; and

fig. 4 shows a flow diagram of a method performed by a BS according to one embodiment of the invention.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As will be understood by those skilled in the art, a "terminal" as used herein includes both devices that include a wireless signal receiver, which are devices having only a wireless signal receiver without transmit capability, and receiving and transmitting hardware devices, which have receiving and transmitting hardware devices capable of two-way communication over a two-way communication link. Such a device may include: a cellular or other communication device having a single line display or a multi-line display or a cellular or other communication device without a multi-line display; a PCS (personal communications System), which may combine voice, data processing, facsimile and/or data communications capabilities; a PDA (personal digital assistant) which may include a radio frequency receiver, pager, internet/intranet access, web browser, notepad, calendar and/or GPS (global positioning system) receiver; a conventional laptop and/or palmtop computer or other device having and/or including a radio frequency receiver. As used herein, a "terminal" or "terminal device" may be portable, transportable, installed in a vehicle (aeronautical, maritime, and/or land-based), or situated and/or configured to operate locally and/or in a distributed fashion at any other location(s) on earth and/or in space. As used herein, a "terminal" and a "terminal device" may also be a communication terminal, a web terminal, and a music/video playing terminal, such as a PDA, an MID (mobile internet device) and/or a mobile phone with music/video playing function, and may also be a smart tv, a set-top box, and the like.

To support more flexible scheduling, the 3GPP decides to support variable Hybrid Automatic Repeat request-Acknowledgement (HARQ-ACK) feedback delay in 5G. In an existing Long Term Evolution (LTE) system, the Time for receiving HARQ-ACK uplink transmission from downlink data is fixed, for example, in a Frequency Division Duplex (FDD) system, a Time delay is 4 subframes, and in a Time Division Duplex (TDD) system, the Time delay is 4 subframes. And determining a HARQ-ACK feedback time delay for the corresponding downlink subframe according to the uplink and downlink configuration. In a 5G system, whether FDD or TDD, the uplink time unit for which HARQ-ACK can be fed back is variable for a certain downlink time unit (e.g., downlink timeslot, or downlink mini-timeslot). For example, the HARQ-ACK feedback delay may be dynamically indicated through physical layer signaling, or different HARQ-ACK delays may be determined according to different services or user capabilities and other factors.

In 5G, when the HARQ-ACK delay is variable, even in an FDD system, the HARQ-ACK to be fed back in one uplink time unit may be from downlink data of multiple downlink time units, and the number of HARQ-ACK downlink time units to be fed back is also variable, and the situation is often different for each UE. Compared with the existing TDD system, the starting position and the length of the bundling window for HARQ-ACK feedback are variable due to the variable HARQ-ACK time delay. In addition, in 5G, HARQ-ACK feedback based on a Code Block Group (CBG) may be used in addition to the HARQ-ACK feedback mechanism with Transport Block (TB) granularity in the conventional LTE system. When Physical Downlink Shared Channels (PDSCHs) of the two HARQ-ACK feedback mechanisms need to be fed back in the same Physical Uplink Control Channel (PUCCH) or Physical Uplink Shared Channel (PUSCH), how to design Downlink Control signaling so that the user equipment determines the HARQ-ACK codebook and how to design Uplink Control signaling to carry the HARQ-ACK are all urgent solutions.

Hereinafter, various embodiments of the present application will be described in detail with reference to the accompanying drawings.

Fig. 1 shows a block diagram of a transceiving node of a second type according to an embodiment of the present invention.

Referring to fig. 1, a second type of transceiving node 100 may comprise a transceiver 101 and a controller 102.

The transceiver 101 may be configured to receive first type data and/or first type control signaling from a first type transceiving node and to transmit a HARQ-ACK codebook to the first type transceiving node at a determined time unit.

The controller 102 may be a circuit application specific integrated circuit or at least one processor. The controller 102 may be configured to control the overall operation of the second type of transceiving node, as well as to control the second type of transceiving node to implement the method proposed in the present invention. In particular, the controller 102 may be configured to determine a HARQ-ACK codebook and a time unit for transmitting the HARQ-ACK codebook based on the first type of data and/or the first type of control signaling, and to control the transceiver 101 to transmit the HARQ-ACK codebook to the first type of transceiving node at the determined time unit.

In the present invention, the first type of transceiver node may be a BS (Base Station), and the second type of transceiver node may be a UE (User Equipment). In the following examples, the BS is taken as an example (but not limited to) to describe the first type of transceiving node, and the UE is taken as an example (but not limited to) to describe the second type of transceiving node.

The first type of data may be data transmitted by the first type of transceiving node to the second type of transceiving node, and in the following example, the first type of data is exemplified by (but not limited to) Downlink data carried by a PDSCH (Physical Downlink Shared CHannel).

The second type of data may be data transmitted by the second type of transceiving node to the first type of transceiving node, and in the following example, the second type of data is described by taking PUSCH (Physical Uplink Shared CHannel) as an example (but not limited to).

The first type of control signaling may be control signaling sent by the first type of transceiving node to the second type of transceiving node, and in the following examples, the first type of control signaling is described by taking downlink control signaling as an example (but not limited to). The Downlink Control signaling may be DCI (Downlink Control information) carried by a PDCCH (Physical Downlink Control CHannel) and/or Control signaling carried by a PDSCH (Physical Downlink Shared CHannel).

The second type of control signaling may be control signaling sent by the second type of transceiving node to the first type of transceiving node, and in the following examples, the second type of control signaling is described by taking the uplink control signaling as an example (but not limited to). The Uplink Control signaling may be UCI (Uplink Control information) carried through a PUCCH (Physical Uplink Control CHannel) and/or Control signaling carried through a PUSCH (Physical Uplink Shared CHannel). The UCI may contain a HARQ-ACK codebook.

The first type time unit is a time unit for the first type transceiving node to transmit the first type data and/or the first type control signaling, and in the following example, the first type time unit is described by taking a downlink time unit as an example (but not limited to).

The second type time unit is a time unit for the second type transceiving node to send the second type data and/or the second type control signaling, and in the following example, the second type time unit is described by taking an uplink time unit as an example (but not limited to).

The first type time unit and the second type time unit may be one or more slots (slots), one or more sub-slots (sub-slots), one or more OFDM (Orthogonal Frequency Division Multiplexing) symbols, one or more subframes (subframes).

Depending on the network type, the term "base station" or "BS" may refer to any component (or collection of components) configured to provide wireless access to a network, such as a Transmission Point (TP), a transmission-reception point (TRP), an enhanced base station (eNodeB or eNB), a 5G base station (gNB), a macrocell, a femtocell, a WiFi Access Point (AP), or other wirelessly enabled device. The base station may provide wireless access according to one or more wireless communication protocols, e.g., 5G 3GPP New radio interface/Access (NR), Long Term Evolution (LTE), LTE-advanced (LTE-A), High Speed Packet Access (HSPA), Wi-Fi 802.11a/b/G/n/ac, etc. For convenience, the terms "BS" and "TRP" are used interchangeably in this patent document to refer to network infrastructure components that provide wireless access for remote terminals. Further, depending on the network type, the term "user equipment" or "UE" may refer to any component, such as a "mobile station," subscriber station, "" remote terminal, "" wireless terminal, "" reception point, "" user equipment, "or simply a" terminal. For convenience, the term "user equipment" or "UE" is used in this patent document to refer to a remote wireless device that wirelessly accesses a BS, whether the UE is a mobile device (such as a mobile phone or smartphone) or a commonly-considered stationary device (e.g., a desktop computer or vending machine).

Fig. 2 shows a flow diagram of a method performed by a UE according to one embodiment of the invention.

First, in step 201, the UE receives downlink data and/or downlink control signaling from the BS.

In step 202, the UE determines a HARQ-ACK codebook and an uplink time unit for transmitting the HARQ-ACK codebook based on downlink data and/or downlink control signaling.

Optionally, the uplink time unit for transmitting the HARQ-ACK codebook may be determined according to HARQ-ACK timing information included in downlink control signaling, and the HARQ-ACK timing information may be configured through dynamic indication and/or higher layer signaling.

In step 203, the UE transmits a HARQ-ACK codebook to the BS in the determined uplink time unit.

Optionally, the HARQ-ACK codebook determined in step 202 includes HARQ-ACK information for a PDSCH associated with the HARQ-ACK codebook and/or HARQ-ACK information for a DCI indicating a Semi-Persistent Scheduling (SPS) PDSCH release.

If the base station does not successfully receive the HARQ-ACK information transmitted in step S202, the base station cannot determine whether the UE correctly receives the PDSCH and/or DCI indicating SPS PDSCH release, and thus cannot make an appropriate scheduling decision. In order to reduce the impact of the reception failure of the HARQ-ACK information on the scheduling, a HARQ-ACK retransmission mechanism may be employed. For example, the base station may trigger the UE to retransmit HARQ-ACK information that was not successfully received by the base station. According to one implementation, the base station may trigger the UE to feed back HARQ-ACK information for all HARQ processes. In addition, for services with different performance requirements, such as eMBB and URLLC, the requirements for HARQ-ACK feedback are also different. Different performance requirements may be met by configuring various HARQ-ACK feedback parameters, such as number of HARQ-ACK codebook, priority of HARQ-ACK codebook, HARQ-ACK codebook type, HARQ-ACK timing, resource for feeding back HARQ-ACK, etc.

The HARQ-ACK feedback parameter may be an indication by the base station when the UE is triggered to feed back HARQ-ACK of the HARQ process. Alternatively, the HARQ-ACK feedback parameter is an indication when the base station configures PDSCH transmission, for example, the base station configures the HARQ-ACK feedback parameter when SPS (Semi-Persistent Scheduling) PDSCH information is configured.

The HARQ-ACK feedback parameters contain at least HARQ-ACK codebook information, e.g., the priority of the HARQ-ACK codebook. The triggered HARQ-ACK codebook may be a HARQ-ACK codebook based on all HARQ processes. For example, for serving cell c, all HARQ processes may be configured by the base station. Alternatively, the base station may configure different HARQ processes for HARQ-ACK codebooks of different priorities. Alternatively, the base station may configure the HARQ process by configuring the maximum number of available HARQ processes and/or the HARQ process offset. If the base station is not configured, the number of downlink HARQ processes may be determined according to a default value specified by a protocol. For example, the protocol specifies that the default total number of downlink HARQ processes is 8, and the available downlink HARQ processes are 0,1,2,3,4,5,6, and 7.

According to one embodiment of the invention, the HARQ-ACK codebooks of different priorities can be triggered by means of a display indication or an implicit indication.

The manner of displaying the indication may be to indicate the priority of the triggered HARQ-ACK codebook by 1 bit in the DCI. If the DCI schedules a PDSCH or indicates SPS PDSCH release, the priority of the triggered HARQ-ACK codebook may be the same as the priority of the DCI scheduled PDSCH or the priority of the DCI scheduled PDSCH release, or the priority of the triggered HARQ-ACK codebook may be different from the priority of the DCI scheduled PDSCH or the SPS PDSCH release. Whether the priority of the HARQ-ACK codebook is the same as the priority of the DCI scheduled PDSCH or the priority indicating SPS PDSCH release may be configured by higher layer signaling or specified by a protocol.

The method triggers the HARQ-ACK codebooks of different priorities by displaying the indication, thereby increasing the flexibility of network scheduling, simultaneously ensuring the understanding consistency of the network and the UE for the HARQ-ACK codebooks and increasing the transmission reliability of the HARQ-ACK codebooks.

According to an embodiment of the present invention, the implicit indication may be by implicitly indicating the priority of the triggered HARQ-ACK codebook through a DCI format. For example, if the DCI format is DCI format one, the priority of the triggered HARQ-ACK codebook is low; if the DCI format is DCI format two, the priority of the triggered HARQ-ACK codebook is high. The first DCI format may be one of DCI format1_ 0, and/or DCI format1_ 1, and/or DCI format1_ 2. The DCI format two may be one of DCI format1_ 0, and/or DCI format1_ 1, and/or DCI format1_ 2. Specifically, for a certain priority or a default priority, the downlink scheduling DCI format may be configured as one or more of DCI format1_ 0, DCI format1_ 1, and/or DCI format1_2 according to a protocol specification.

According to the method, the HARQ-ACK codebooks of different priorities are triggered through implicit indication, so that the flexibility of network scheduling is improved and the spectrum efficiency of a network is improved on the premise of not increasing DCI signaling overhead.

According to an embodiment of the present invention, the implicit indication may indicate the priority of the triggered HARQ-ACK codebook through an RNTI (Radio Network temporary identity). For example, the priority of the HARQ-ACK codebook triggered by the DCI scrambled by the first type of RNTI is low, and the priority of the HARQ-ACK codebook triggered by the DCI scrambled by the second type of RNTI is high. The first type of RNTI may be a C-RNTI, and/or an MCS-C-RNTI, and/or a CS-RNT. The second type of RNTI may be a C-RNTI, and/or an MCS-C-RNTI, and/or a CS-RNT. Specifically, for a certain priority or a default priority, the RNTI scrambled by the downlink scheduling DCI can be specified to be C-RNTI and/or MCS-C-RNTI and/or CS-RNT through a protocol.

In another embodiment, the triggered HARQ-ACK codebook may be configured by protocol specification or higher layer signaling to contain HARQ-ACK information indicating DCI for SPS PDSCH release. For Rel-15, one PUCCH group contains at most one SPS PDSCH, and 1 bit may be added after or before the HARQ-ACK codebook to indicate the HARQ-ACK information of DCI for SPS PDSCH release.

According to an embodiment of the invention, for the case that one serving cell can configure one or more SPS PDSCHs, for each serving cell, the number of bits of HARQ-ACK information of DCI indicating SPS PDSCH release triggered by the HARQ-ACK codebook may be configured through protocol specification or higher layer signaling. The number of bits of the HARQ-ACK information of the DCI for instructing the SPS PDSCH to be released by each serving cell may be the same or different.

According to an embodiment of the present invention, for each serving cell, for a certain serving cell c, the number of bits of HARQ-ACK information of DCI indicating SPS PDSCH release on the serving cell c may be equal to the number of SPS PDSCH configurations of the serving cell c. Specifically, the number of SPS PDSCH configurations of the serving cell c is M, and the numbers of the SPS PDSCH configurations of the serving cell c are 0,1,2, …, and M-1, respectively. The bit number of HARQ-ACK information of DCI (Downlink control information) indicating SPS PDSCH release on the serving cell c is M, and the serial numbers of the configuration of the SPS PDSCH sequentially corresponding to the serving cell c are respectively 0,1,2, … and M-1. In this embodiment, the number of bits of the HARQ-ACK information of the DCI indicating the SPS PDSCH release on each serving cell may be the same or different.

According to an embodiment of the present invention, for each serving cell, for a certain serving cell c, the bit number of HARQ-ACK information of DCI indicating SPS PDSCH release on the serving cell c may be determined by the bit number of a domain indicating HARQ process of a certain DCI format of the serving cell c, and the DCI format may be DCI format1_ 0, DCI format1_ 1, and/or DCI format1_ 2. Specifically, the number of bits of a domain in which a DCI format of the serving cell c indicates a HARQ process is N, and the SPS PDSCH configuration numbers of the serving cell c are 0,1,2, …, and 2, respectively^N-1. The bit number of HARQ-ACK information of DCI for indicating SPS PDSCH release on serving cell c is 2^NThe SPS PDSCH configuration numbers sequentially corresponding to the serving cell c are 0,1,2, …,2, respectively^NDCI of 1 indicating SPS PDSCH release. In this embodiment, the number of bits of the HARQ-ACK information of the DCI indicating the SPS PDSCH release on each serving cell may be the same or different.

According to an embodiment of the present invention, for each serving cell, for a certain serving cell c, a plurality of bits of HARQ-ACK information of DCI indicating SPS PDSCH release in the HARQ-ACK codebook may be located after or before HARQ-ACK information bits of each HARQ process of the serving cell c. In the HARQ-ACK codebook, the multiple bits of the HARQ-ACK information of the DCI indicating the SPS PDSCH release on each serving cell may also be located after or before the HARQ-ACK information bits of each HARQ process of all serving cells, and the multiple bits of the HARQ-ACK information of the DCI indicating the SPS PDSCH release by different serving cells may be ordered according to the number of the serving cell in the order from small to large or from large to small. The multiple bits of the HARQ-ACK information of the DCI for which the same serving cell indicates the SPS PDSCH release may be ordered from small to large or from large to small according to the number of the SPS PDSCH configuration.

According to an embodiment of the present invention, for each serving cell, for a certain serving cell c, the number of bits of HARQ-ACK information of DCI indicating SPS PDSCH release on the serving cell c may also be equal to the number of configurations indicating one or more SPS PDSCH releases on the serving cell c. Specifically, the serving cell c indicates that the number of the configurations released by the one or more SPS PDSCHs is P, and the numbers of the configurations released by the serving cell c indicate 0,1,2, … and P-1, respectively. The bit number of HARQ-ACK information of DCI (Downlink control information) indicating SPS PDSCH release on the serving cell c is P, and the serial numbers of configuration indicating one or more SPS PDSCH release corresponding to the serving cell c are respectively 0,1,2, … and P-1. In this embodiment, the number of bits of the HARQ-ACK information of the DCI indicating the SPS PDSCH release on each serving cell may be the same or different.

According to an embodiment of the present invention, for each serving cell, for a certain serving cell c, P bits of HARQ-ACK information of DCI indicating SPS PDSCH release in the HARQ-ACK codebook may be located after or before HARQ-ACK information bits of each HARQ process of the serving cell c. In the HARQ-ACK codebook, P bits of the HARQ-ACK information of the DCI indicating the SPS PDSCH release on each serving cell may also be located after or before the HARQ-ACK information bits of each HARQ process of all serving cells, and P bits of the HARQ-ACK information of the DCI indicating the SPS PDSCH release by different serving cells may be ordered according to the number of the serving cell in the order from small to large or from large to small. The P bits of the HARQ-ACK information of the DCI for the same serving cell to indicate the SPS PDSCH release may be ordered from small to large or from large to small according to the number of the SPS PDSCH configuration.

According to an embodiment of the present invention, for each serving cell, for a certain serving cell c, the number of bits of HARQ-ACK information of DCI indicating SPS PDSCH release on the serving cell c may be configured as Q through higher layer signaling_c. Specifically, the HARQ-ACK information of DCI indicating SPS PDSCH release on serving cell c may indicate the latest Q received before transmitting the HARQ-ACK codebook_cHARQ-ACK information of DCI indicating SPS PDSCH release. Optionally, the HARQ-ACK information of the DCI indicating the SPS PDSCH release needs to meet the requirement of the UE processing capability, that is, certain time requirement. In this embodiment, Q is configured by higher layer signaling_cMay be the same or different for each serving cell.

According to one embodiment of the invention, for each serving cell, for a certain serving cell c, Q of HARQ-ACK information of DCI indicating SPS PDSCH release in HARQ-ACK codebook_cThe bits may be located after or before the HARQ-ACK information bits for each HARQ process of the serving cell c. In the HARQ-ACK codebook, the multiple bits of the HARQ-ACK information of the DCI indicating the SPS PDSCH release on each serving cell may also be located after or before the HARQ-ACK information bits of each HARQ process of all serving cells, and the multiple bits of the HARQ-ACK information of the DCI indicating the SPS PDSCH release by different serving cells may be ordered according to the number of the serving cell in the order from small to large or from large to small. The multiple bits of the HARQ-ACK information of the DCI for which the same serving cell indicates the SPS PDSCH release may be ordered from small to large or from large to small according to the number of the SPS PDSCH configuration. The number of bits of HARQ-ACK information of DCI indicating SPS PDSCH release on each serving cell may be configured by the same or different parameters and may be configured to be the same or different.

The method provides a display and implicit mode to indicate the bit number of the HARQ-ACK information of the DCI released by the SPS PDSCH by each service cell, can ensure the comprehension consistency of the base station and the UE for the HARQ-ACK codebook, can trigger the feedback of the HARQ-ACK information of the DCI released by the SPS PDSCH while feeding back the HARQ-ACK information of the downlink data, and increases the scheduling flexibility. The method can reduce the time delay of feeding back the HARQ-ACK information corresponding to the SPS PDSCH release DCI, can also reduce the physical layer signaling overhead of independently feeding back the HARQ-ACK information corresponding to the SPS PDSCH release DCI, and can increase the spectrum efficiency of the system.

According to an embodiment of the present invention, for each serving cell, for a certain serving cell c, a status list indicating SPS PDSCH release may also be configured according to different priorities of HARQ-ACK codebooks indicating SPS PDSCH release. Specifically, the HARQ-ACK codebook indicating the SPS PDSCH release has two different priorities, i.e., priority 0 and priority 1. Priority 1 is higher than priority 0. A status list 0 indicating SPS PDSCH release may be configured for priority 0. The status list 0 indicating SPS PDSCH release contains one or more statuses indicating SPS PDSCH release, and each status indicating SPS PDSCH release contains one or more SPS configuration indices. A status list 1 indicating SPS PDSCH release may be configured for priority 1. The status list 1 indicating SPS PDSCH release contains one or more statuses indicating SPS PDSCH release, and each status indicating SPS PDSCH release contains one or more SPS configuration indices.

Each SPS PDSCH configuration can have a parameter indicating an HARQ-ACK codebook corresponding to the SPS PDSCH, and the HARQ-ACK codebook has corresponding priority; or one parameter in each SPS PDSCH configuration indicates the priority of the HARQ-ACK codebook corresponding to the SPS PDSCH. The SPS priority contained in the released state of each SPS PDSCH in the state list 0 for indicating the SPS PDSCH release is 0, or the priority of a HARQ-ACK codebook corresponding to the SPS PDSCH is 0; the SPS PDSCH priority included in the status list 1 indicating the SPS PDSCH release is 1 for each SPS PDSCH release status, or the priority of the HARQ-ACK codebook corresponding to the SPS PDSCH is 1.

When a priority field exists in the DCI for indicating the SPS PDSCH release, indicating a state list indicating the SPS PDSCH release with the same priority through the priority field in the DCI. Specifically, when the priority field existing in the DCI indicating the SPS PDSCH release indicates a priority of 0, it indicates that: one of the state list 0 indicating the release of the SPS PDSCH indicates the state of the release of the SPS PDSCH; when the priority field present in the DCI indicating the SPS PDSCH release indicates a priority of 1, it indicates that: one of the state lists 1 indicating the release of the SPS PDSCH indicates the state of the release of the SPS PDSCH.

When there is no priority field in a DCI indicating SPS PDSCH release, one priority may be specified for the DCI format. Specifically, when the DCI indicating the SPS PDSCH release is DCI format1_ 0, corresponding to priority 0, it indicates that: one of the status lists 0 indicating the release of the SPS PDSCH indicates the status of the release of the SPS PDSCH. Similarly, a priority may be fixed for other DCI formats. For example, the priority of different DCI formats may be specified by a protocol, or may be configured by higher layer signaling.

The method distinguishes the status lists indicating the SPS PDSCH release with different priorities, and can reduce the bit number in the DCI. For example, priority 0 has 4 states indicating SPS PDSCH release, priority 1 has 4 states indicating SPS PDSCH release, and there are 8 states indicated in total. If indicated in the DCI, 3 bits are needed to indicate. The invention can adopt 2 bits to indicate, thus saving the signaling overhead of one bit. Under the condition that the DCI overhead is the same, the method can indicate more states indicating the SPS PDSCH release. For example, for a scenario that is also 3 bits, the method may indicate 8 states of priority 0 indicating SPS PDSCH release and 8 states of priority 1 indicating SPS PDSCH release, respectively. Thus, the present invention increases scheduling flexibility.

According to an embodiment of the present invention, in the case that the HARQ-ACK codebook includes HARQ-ACK information indicating DCI for SPS PDSCH release, a time relationship that should be satisfied between the time when the DCI for SPS PDSCH release is received and the time when the HARQ-ACK codebook including the HARQ-ACK information indicating DCI for SPS PDSCH release is transmitted may be configured by protocol specification or higher layer signaling. For example, the time interval between the time of receiving the DCI and the time of transmitting the HARQ-ACK codebook is not greater than X slots or sub-slots or OFDM symbols, and the time interval between the time of receiving the DCI and the time of transmitting the HARQ-ACK codebook is not less than Y slots or sub-slots or OFDM symbols.

The method can feed back the HARQ-ACK information corresponding to the DCI for indicating the SPS PDSCH release in the HARQ-ACK codebook at the same time, can reduce the time delay for feeding back the HARQ-ACK information corresponding to the DCI for indicating the SPS PDSCH release, can also reduce the physical layer signaling overhead for independently feeding back the HARQ-ACK information corresponding to the DCI for indicating the SPS PDSCH release, and can increase the spectrum efficiency of the system.

In another embodiment, the configuration may be through protocol specification or higher layer signaling, such that the triggered HARQ-ACK codebook contains HARQ-ACK information of DCI indicating SPS PDSCH release and replaces HARQ-ACK information of a certain HARQ process in the HARQ-ACK codebook. Specifically corresponding HARQ processes of DCI indicating SPS PDSCH release may be configured through high-layer signaling, for example, for a certain serving cell c, for each serving cell, the high-layer signaling configures HARQ-ACK information indicating that DCI indicating SPS PDSCH release of the serving cell c replaces HARQ process 0 of the serving cell c. The HARQ process specifically corresponding to the DCI indicating the SPS PDSCH release may also be calculated by a formula. For example, the HARQ-ACK information of DCI indicating the release of SPS PDSCH may be fed back by using the bit in the HARQ-ACK codebook of the HARQ process corresponding to the most recently received SPS PDSCH.

The method can feed back the HARQ-ACK information corresponding to the DCI which indicates the SPS PDSCH release in the HARQ-ACK codebook at the same time under the condition of not increasing the number of bits of the HARQ-ACK codebook, can reduce the time delay of feeding back the HARQ-ACK information corresponding to the DCI which indicates the SPS PDSCH release, can also reduce the physical layer signaling overhead of independently feeding back the HARQ-ACK information corresponding to the DCI which indicates the SPS PDSCH release, and can increase the spectrum efficiency of a system.

According to one embodiment of the invention, the transmission of the HARQ-ACK codebook for all configured HARQ processes can be triggered by one CS-RNTI scrambled DCI indicating SPS PDSCH release. At this time, the bits of the frequency domain resource allocation field are all 1. The indication of whether to trigger transmission of the HARQ-ACK codebook for all configured HARQ processes may be displayed with 1 bit in the DCI. In case the 1 bit in DCI is 1, it indicates that transmission of HARQ-ACK codebook for all configured HARQ processes is triggered. In case that the 1 bit in the DCI is 0, it indicates that transmission of HARQ-ACK codebooks for all configured HARQ processes is not triggered. Alternatively, in case the 1 bit in DCI is 0, the indication triggers transmission of HARQ-ACK codebook for all configured HARQ processes. In case the 1 bit in DCI is 1, it indicates that transmission of HARQ-ACK codebook for all configured HARQ processes is not triggered. The HARQ-ACK information bits corresponding to the DCI may be located after or before the HARQ-ACK codebooks of all configured HARQ processes.

The method can trigger the transmission of the HARQ-ACK codebooks of all the configured HARQ processes through the DCI released by the SPS PDSCH, can improve the flexibility of network scheduling, can reduce the time delay of feeding back the HARQ-ACK information of all the configured HARQ processes, and can also increase the spectrum efficiency of a system.

According to one embodiment of the invention, the triggered HARQ-ACK codebook comprises HARQ-ACK information of DCI indicating SPS PDSCH release instead of HARQ-ACK information of a certain HARQ process in the HARQ-ACK codebook. The HARQ process specifically corresponding to the DCI indicating the SPS PDSCH release may be configured through higher layer signaling, for example, the HARQ process 0 corresponding to the serving cell c may be configured through higher layer signaling. The HARQ process specifically corresponding to the DCI indicating the SPS PDSCH release may also be calculated by a formula. For example, the HARQ-ACK information of the DCI indicating the SPS PDSCH release may be fed back according to the bit in the HARQ-ACK codebook of the HARQ process corresponding to the most recently received SPS PDSCH corresponding to the DCI indicating the SPS PDSCH release.

The method can feed back HARQ-ACK information of DCI released by SPS PDSCH while feeding back HARQ-ACK information of all HARQ processes under the condition of not increasing HARQ-ACK codebooks, thereby increasing the scheduling flexibility. The method can reduce the time delay of feeding back the HARQ-ACK information corresponding to the SPS PDSCH release DCI, can also reduce the physical layer signaling overhead of independently feeding back the HARQ-ACK information corresponding to the SPS PDSCH release DCI, and can increase the spectrum efficiency of the system.

In another embodiment, the transmission of the HARQ-ACK codebook for all configured HARQ processes may be triggered by RNTI scrambled DCI for one dynamic data scheduling. The RNTI of the dynamic data scheduling may be a C-RNTI or an MCS-C-RNTI. The indication of whether to trigger transmission of the HARQ-ACK codebook for all configured HARQ processes may be displayed with 1 bit in the DCI. In case the 1 bit in DCI is 1, it indicates that transmission of HARQ-ACK codebook for all configured HARQ processes is triggered. In case the 1 bit in DCI is 0, it indicates that transmission of HARQ-ACK codebook for all configured HARQ processes is triggered. Alternatively, in case the 1 bit in DCI is 0, the indication triggers transmission of HARQ-ACK codebook for all configured HARQ processes. In case the 1 bit in DCI is 1, it indicates that transmission of HARQ-ACK codebook for all configured HARQ processes is not triggered. And, at this time, whether the DCI schedules one PDSCH at the same time may be indicated by the frequency domain resource allocation field, and when the frequency domain resource allocation field indicates an effective frequency domain resource, it is considered that the DCI schedules one PDSCH at the same time. And when the frequency domain resource allocation domain indicates an invalid frequency domain resource, the DCI is considered not to schedule a PDSCH. Specifically, when the frequency domain resource allocation adopts type 0, that is, a bitmap manner, bits of the frequency domain resource allocation domain in the DCI are all 0, which may be used to indicate that there is no PDSCH scheduling; when the frequency domain Resource allocation adopts type 1, that is, when the starting RB (Resource Block) of the frequency domain Resource and the length of the RB are indicated, bits of the frequency domain Resource allocation field in the DCI are all 1, which may be used to indicate that there is no PDSCH scheduling.

The method can indicate whether to trigger HARQ-ACK feedback of all HARQ processes through time domain allocation resource domains in DCI under the condition of no downlink data scheduling, and at the moment, the domain allocated by the frequency domain resources is invalid frequency domain resource indication. The method increases the flexibility of scheduling.

In another embodiment, in case that DCI scrambled by one CS-RNTI indicates release of SPS PDSCH, transmission of HARQ-ACK codebook for all configured HARQ processes is not triggered even though 1 bit indicating whether transmission of HARQ-ACK codebook for all configured HARQ processes is triggered is included in DCI. I.e. the UE does not expect to be triggered to feed back HARQ-ACK information for all HARQ processes by one DCI indicating the release of SPS PDSCH.

The method provides that the DCI indicating the release of the SPS PDSCH can not trigger HARQ-ACK feedback of all HARQ processes at the same time, and the consistency of the understanding of the base station and the UE on scheduling is ensured. The behavior of the UE is normalized.

In another embodiment, enhancements are made on the basis of a 3GPP TS38.213 type-1 HARQ-ACK codebook. The 3GPP TS38.213 type-1 HARQ-ACK codebook (semi-static HARQ-ACK codebook) determines the size of the HARQ-ACK codebook according to semi-statically configured parameters. For a certain serving cell c, on the activated BWP (sub-band width part), the number of PDSCHs that need to be fed back in a downlink time slot i is determined by the maximum value of the number of non-overlapped PDSCHs in the downlink time slot i. The time domain resource occupied by the PDSCH is determined by configuring a time domain resource allocation table through high-layer signaling and dynamically indicating a certain row in the time domain resource allocation table by the DCI. Specifically, the first row of the time domain resource allocation table is 0, the OFDM symbol length is 4, the second row of the time domain resource allocation table is 4, the OFDM symbol length is 4, the third row of the time domain resource allocation table is 7, and the OFDM symbol length is 4. The downlink scheduled PDSCH may indicate any row in the time domain resource allocation table. In this embodiment, when all the OFDM symbols in the downlink slot i are downlink symbols, the maximum value of the number of non-overlapped PDSCHs in the downlink slot i is 2. At this time, the type-1 HARQ-ACK codebook needs to feed back HARQ-ACK information for 2 PDSCHs. In the R15 version, the PDSCH repeated transmission takes 1 downlink time slot as a cycle, the time domain resources and frequency domain resources occupied by each downlink time slot are the same, and the number of times of repeated transmission is configured by a high-level signaling. And the position of the HARQ-ACK information of the PDSCH which is repeatedly transmitted in the type-1 HARQ-ACK codebook is determined according to the last PDSCH in the PDSCH which is repeatedly transmitted. And the time interval between the last PDSCH in the repeatedly transmitted PDSCHs and the PUCCH feeding back the HARQ-ACK is K1 uplink time slots. In release R16, since PDSCH can be repeatedly transmitted within one slot, if the position of the HARQ-ACK information of PDSCH in the 3GPP TS38.213 type-1 HARQ-ACK codebook is determined according to the time domain resource of the last PDSCH, there may be a case where the last PDSCH does not have the position of the corresponding HARQ-ACK information in the 3GPP TS38.213 type-1 HARQ-ACK codebook. Specifically, in this embodiment, the downlink scheduling DCI 1 schedules the second row in the PDSCH indication time domain resource allocation table, i is repeatedly transmitted 2 times in one downlink time slot, and the time domain interval of 2 repeatedly transmitted PDSCHs is 0 OFDM symbol. The first PDSCH repeatedly transmits OFDM symbols 4-7 positioned in a time slot i; the second PDSCH repeatedly transmits OFDM symbols 8-11 located in slot i. The time domain interval of 2 repeatedly transmitted PDSCHs may also be configured to other values through higher layer signaling, and the unit is an OFDM symbol. According to the existing 3GPP TS38.213 type-1 HARQ-ACK codebook and a PUCCH time slot determination method of HARQ-ACK, the position of HARQ-ACK information corresponding to the time domain resource occupied by the PDSCH of the second repeated transmission does not exist in the 3GPP TS38.213 type-1 HARQ-ACK codebook. In this embodiment, through protocol specification and/or through higher layer signaling configuration, in the 3GPP TS38.213 type-1 HARQ-ACK codebook, the uplink slot for HARQ-ACK feedback of the PDSCH repeatedly transmitted within the slot is determined by the first PDSCH in the PDSCH repeatedly transmitted within the slot, i.e., K1 in the downlink scheduling DCI indicates the time interval between the first PDSCH in the PDSCH repeatedly transmitted within the slot and the PUCCH feeding back HARQ-ACK, and the position of the HARQ-ACK information of the PDSCH in the 3GPP TS38.213 type-1 HARQ-ACK codebook is determined by the time domain resource of the first PDSCH in the PDSCH repeatedly transmitted within the slot. In this embodiment, the position of HARQ-ACK information of DCI 1 scheduled PDSCH in 3GPP TS38.213 type-1 HARQ-ACK codebook is determined by that the starting OFDM symbol of slot i is 4, and the OFDM symbol length is 4.

In another embodiment, the 3GPP TS38.213 type-1 HARQ-ACK codebook may also be determined by an extended time domain resource allocation table. And the position of the HARQ-ACK information of the PDSCH subjected to repeated transmission in the type-1 HARQ-ACK codebook is determined according to the time domain resource of the last PDSCH in the PDSCH subjected to repeated transmission. And the time interval between the last PDSCH in the repeatedly transmitted PDSCHs and the PUCCH feeding back the HARQ-ACK is K1 uplink time slots. Specifically, the first row of the time domain resource allocation table is 0, the OFDM symbol length is 4, the second row of the time domain resource allocation table is 4, the OFDM symbol length is 4, the third row of the time domain resource allocation table is 7, and the OFDM symbol length is 4. The downlink scheduled PDSCH may indicate any row in the time domain resource allocation table. In this embodiment, when all the OFDM symbols in the downlink slot i are downlink symbols, the maximum value of the number of non-overlapped PDSCHs in the downlink slot i is 2. Specifically, in this embodiment, the downlink scheduling DCI 1 schedules the second row in the PDSCH indication time domain resource allocation table, i is repeatedly transmitted 2 times in one downlink time slot, and the time domain interval of 2 repeatedly transmitted PDSCHs is 0 OFDM symbol. The first PDSCH repeatedly transmits OFDM symbols 4,5,6,7 located in slot i; the second PDSCH repeatedly transmits OFDM symbols 8, 9, 10, 11 located in slot i. The possible time domain resources of all PDSCHs in slot i are: OFDM symbols 0-3, OFDM symbols 4-7, OFDM symbols 8-11, and OFDM symbols 7-10. If the repeatedly transmitted PDSCH exceeds the last OFDM symbol in the time slot, the PDSCH is an invalid PDSCH. That is, in this embodiment, the base station does not allow the PDSCH scheduled in the third row of one time domain resource allocation table to be repeatedly transmitted in the time slot. In this embodiment, the maximum value of the number of non-overlapped PDSCHs in the downlink slot i is 3. The position of HARQ-ACK information of DCI 1 scheduled PDSCH in 3GPP TS38.213 type-1 HARQ-ACK code is determined by the starting OFDM symbol of slot i being 8, OFDM symbol length being 4. Optionally, in this embodiment, for all locations where PDSCH is transmitted, HARQ-ACK information is fed back at a corresponding location of HARQ-ACK information in a 3GPP TS38.213 type-1 HARQ-ACK codebook.

The scheme can ensure the consistency of the base station and the UE for the understanding of the HARQ-ACK codebook, and improves the reliability of the transmission of the HARQ-ACK codebook. In addition, the method for generating the HARQ-ACK codebook is determined by a high-layer signaling configuration mode, so that the flexibility of the HARQ-ACK codebook can be improved.

In another embodiment, it may be specified by the protocol that higher layer signaling does not allow for simultaneous configuration of PDSCH for repeated transmissions and type-1 HARQ-ACK codebook (semi-static HARQ-ACK codebook) within a slot. The scheme can ensure the consistency of the base station and the UE for the understanding of the HARQ-ACK codebook through configuration, and improves the reliability of the transmission of the HARQ-ACK codebook.

In another embodiment, the UE is configured with multiple activated SPS PDSCH configurations in a certain serving cell c. Optionally, SPS PDSCH configuration # i is configured with the number of inter-slot repeated transmissions N_i,N_iIs an integer of 1 or more, and defaults to 1 if not configured. Optionally, SPS PDSCH configurations # i are each configured with a periodicity of P_i，P_iHas a unit of time slot, P_iIs an integer of 1 or more, and defaults to 1 if not configured. Optionally, SPS PDSCH configuration # i may also be configured with the number of repeated transmissions M within the slot_i,M_iIs an integer of 1 or more, e.g. M_i2, default to 1 if not configured. For SPS PDSCH feeding back HARQ-ACK information in the same uplink time slot, the HARQ-ACK information needs to be multiplexed in the same HARQ-ACK codebook.

When only HARQ-ACK information of SPS PDSCH exists in the HARQ-ACK codebook and each SPS PDSCH does not have an associated PDCCH, namely the HARQ-ACK codebook does not contain HARQ-ACK feedback for the dynamically scheduled PDSCH, HARQ-ACK feedback for DCI indicating SPS PDSCH release, and HARQ-ACK feedback for the first activated SPS PDSCH, the UE generates the HARQ-ACK codebook according to the following method.

When the UE is configured with a plurality of service cells, each service cell respectively generates a HARQ-ACK first-stage sub-codebook of the SPS PDSCH, and the HARQ-ACK first-stage sub-codebooks of each service cell form a HARQ-ACK codebook according to the number of the service cell from small to large.

And the HARQ-ACK second-level sub-codebooks of each serving cell are sequenced from small to large according to the activated SPS PDSCH configuration numbers configured by the serving cell.

And the HARQ-ACK third-level sub-codebooks configured by each SPS PDSCH are sequenced according to the time sequence of the downlink time slot in which the SPS PDSCH is positioned. For example, when the downlink SCS (Sub-Carrier-Spacing) is larger than the uplink SCS, the length of one uplink timeslot is equal to the length of multiple downlink timeslots. When a certain SPS PDSCH period is small, a plurality of data packets configured by the same SPS PDSCH can be fed back in the same uplink time slot. For example, the uplink SCS is 15kHz, and the downlink SCS is 30 kHz. The period of SPS PDSCH configuration #1 is 1 slot, and the number of repeated transmissions between slots of SPS PDSCH configuration #1 is 1. For each uplink time slot, there are 2 data of SPS PDSCH configuration #1 that need to feed back HARQ-ACK information.

And the HARQ-ACK fourth-level sub-codebooks of each SPS PDSCH configuration in one downlink time slot are ordered according to the time sequence of the SPS PDSCHs. For example, the uplink and downlink SCS are the same. The period of the SPS PDSCH configuration #2 is 1 slot, and the number of repeated transmissions between the slots of the SPS PDSCH configuration #2 is 1. SPS PDSCH configuration #2 is configured with 2 repeated transmissions in the slot. For each downlink time slot, there are 2 data of SPS PDSCH configuration #2 to feed back HARQ-ACK information.

Optionally, when transmission of a certain SPS PDSCH and/or repeated transmission of a certain SPS PDSCH (including repeated transmission between slots and/or repeated transmission within a Slot) collides with a dynamic SFI (Slot Format Indication), may be configured through a protocol and/or a higher layer signaling, that is, at least one of OFDM symbols occupied by the SPS PDSCH is indicated as uplink by the dynamic SFI, and at this time, the UE does not need to receive the SPS PDSCH, or it is specified that the UE needs to receive the SPS PDSCH at this time.

Optionally, the protocol may specify and/or the higher layer signaling may configure that when transmission of a certain SPS PDSCH, and/or repeated transmission of a certain SPS PDSCH (including repeated transmission between slots and/or repeated transmission within a slot) collides with an uplink dynamically scheduled PUSCH, that is, at least one of OFDM symbols occupied by the SPS PDSCH is the same as an OFDM symbol occupied by the dynamically scheduled PUSCH, and at this time, the UE does not need to receive the SPS PDSCH, or specifies that the UE needs to receive the SPS PDSCH at this time.

When at least 2 SPS PDSCHs needing to be received by the UE in a certain time slot are overlapped on a time domain, the UE only receives the SPS PDSCH with the minimum SPS PDSCH configuration number in the time slot. When the UE receives at least one repeated transmission of a plurality of repeated transmissions (including repeated transmissions among time slots and/or repeated transmissions in time slots) of a certain SPS PDSCH, the UE needs to feed back HARQ-ACK information to the SPS PDSCH, otherwise, the UE does not need to feed back the HARQ-ACK information to the SPS PDSCH. Or it may also be specified that when the UE receives the last retransmission of multiple retransmissions (including the retransmission between time slots and/or the retransmission within a time slot) of a certain SPS PDSCH, the UE needs to feed back HARQ-ACK information to the SPS PDSCH, otherwise, the UE does not need to feed back HARQ-ACK information to the SPS PDSCH.

When the HARQ-ACK codebook is a semi-static HARQ-ACK codebook, for example, the 3GPP TS38.213 Type-1 HARQ-ACK codebook. Besides the HARQ-ACK information of the SPS PDSCH, the HARQ-ACK codebook also comprises HARQ-ACK feedback of the dynamically scheduled PDSCH, or comprises HARQ-ACK feedback of DCI indicating SPS PDSCH release, or comprises HARQ-ACK feedback of the first activated SPS PDSCH, and the UE generates the HARQ-ACK codebook according to a generation method of a 3GPP TS38.213 Type-1 HARQ-ACK codebook.

Optionally, the protocol may specify and/or the higher layer signaling may configure that when transmission of a certain SPS PDSCH, and/or repeated transmission of a certain SPS PDSCH (including repeated transmission between time slots and/or repeated transmission within a time slot) collides with the dynamic SFI, that is, at least one of OFDM symbols occupied by the SPS PDSCH is indicated as uplink by the dynamic SFI, and the UE does not need to receive the SPS PDSCH, or specifies that the UE needs to receive the SPS PDSCH.

Optionally, the protocol may specify and/or the higher layer signaling may configure that when transmission of a certain SPS PDSCH, and/or repeated transmission of a certain SPS PDSCH (including repeated transmission between time slots and/or repeated transmission within a time slot) collides with a downlink dynamically scheduled PDSCH, that is, at least one of OFDM symbols occupied by the SPS PDSCH is the same as OFDM symbols occupied by the dynamically scheduled PDSCH, at this time, the UE does not need to receive the SPS PDSCH, or specifies that the UE needs to receive the SPS PDSCH at this time.

Alternatively, when the UE receives DCI indicating a certain SPS PDSCH release, the UE may not need to receive data of the SPS PDSCH configuration after the DCI Q1 symbols indicating the SPS PDSCH release, which may be specified by a protocol and/or configured by higher layer signaling. Q1 may be defined as a symbol interval of the last symbol end position of DCI indicating SPS PDSCH release and the first symbol start position of SPS PDSCH, and Q1 may be further defined as a symbol interval of the first symbol start position of DCI indicating SPS PDSCH release and the first symbol start position of SPS PDSCH.

Alternatively, when the UE receives DCI indicating a certain SPS PDSCH release, the UE may not need to receive data of the SPS PDSCH configuration after 1 time slots of the DCI indicating the SPS PDSCH release through protocol specification and/or higher layer signaling configuration. W1 may be defined as a slot interval between a downlink slot in which DCI indicating SPS PDSCH release is located and a downlink slot in which SPS PDSCH is located. W1 may also be equal to the time interval between DCI indicating SPS PDSCH release and its HARQ-ACK feedback.

When at least 2 SPS PDSCHs needing to be received by the UE in a certain time slot are overlapped on a time domain, the UE only receives the SPS PDSCH with the minimum SPS PDSCH configuration number in the time slot. When the UE receives at least one repeated transmission of a plurality of repeated transmissions (including repeated transmissions among time slots and/or repeated transmissions in time slots) of a certain SPS PDSCH, the UE needs to feed back HARQ-ACK information to the SPS PDSCH, otherwise, the UE does not need to feed back the HARQ-ACK information to the SPS PDSCH. Or it may also be specified that when the UE receives the last retransmission of multiple retransmissions (including the retransmission between time slots and/or the retransmission within a time slot) of a certain SPS PDSCH, the UE needs to feed back HARQ-ACK information to the SPS PDSCH, otherwise, the UE does not need to feed back HARQ-ACK information to the SPS PDSCH. Or it may be further specified that when the UE receives at least one of multiple repeated transmissions (including repeated transmissions between slots and/or repeated transmissions within a slot) of a certain SPS PDSCH and a corresponding position of the SPS PDSCH in the HARQ-ACK codebook is not occupied by other dynamically scheduled PDSCHs, and/or is occupied by other SPS PDSCHs with smaller numbers, the UE needs to feed back HARQ-ACK information to the SPS PDSCH, otherwise, does not need to feed back HARQ-ACK information to the SPS PDSCH.

When the HARQ-ACK codebook is a dynamic HARQ-ACK codebook, for example, the 3GPP TS38.213 Type-2 HARQ-ACK codebook. Besides the HARQ-ACK information of the SPS PDSCH, the HARQ-ACK codebook also comprises HARQ-ACK feedback of the dynamically scheduled PDSCH, or comprises HARQ-ACK feedback of DCI indicating SPS PDSCH release, or comprises HARQ-ACK feedback of the first activated SPS PDSCH, and the UE generates the HARQ-ACK codebook according to a generation method of a 3GPP TS38.213 Type-2 HARQ-ACK codebook. The HARQ-ACK sub-codebook of the TB level in the HARQ-ACK codebook is divided into two parts, wherein the first part is the HARQ-ACK codebook with dynamic scheduling DCI, and the second part is the HARQ-ACK codebook without dynamic scheduling DCI. The second part is a HARQ-ACK codebook without dynamic scheduling DCI generated as follows.

Optionally, the protocol may specify and/or the higher layer signaling may configure that when transmission of a certain SPS PDSCH, and/or repeated transmission of a certain SPS PDSCH (including repeated transmission between time slots and/or repeated transmission within a time slot) collides with a downlink dynamically scheduled PUSCH, that is, at least one of OFDM symbols occupied by the SPS PDSCH is the same as an OFDM symbol occupied by the dynamically scheduled PDSCH, and at this time, the UE does not need to receive the SPS PDSCH, or specifies that the UE needs to receive the SPS PDSCH at this time.

Alternatively, when the UE receives DCI indicating a certain SPS PDSCH release, the UE may not need to receive data of the SPS PDSCH configuration after the DCI Q2 symbols indicating the SPS PDSCH release, which may be specified by a protocol and/or configured by higher layer signaling. Q2 may be defined as a symbol interval of the last symbol end position of DCI indicating SPS PDSCH release and the first symbol start position of SPS PDSCH, and Q2 may be further defined as a symbol interval of the first symbol start position of DCI indicating SPS PDSCH release and the first symbol start position of SPS PDSCH.

Alternatively, when the UE receives DCI indicating a certain SPS PDSCH release, the UE may not need to receive data of the SPS PDSCH configuration after 2 time slots of the DCI indicating the SPS PDSCH release through protocol specification and/or higher layer signaling configuration. W2 may be defined as a slot interval between a downlink slot in which DCI indicating SPS PDSCH release is located and a downlink slot in which SPS PDSCH is located. W2 may also be equal to the time interval between DCI indicating SPS PDSCH release and its HARQ-ACK feedback.

Alternatively, when the UE receives the DCI indicating the release of the SPS PDSCH, the UE may be configured through protocol specification and/or higher layer signaling, and after feeding back an ACK to the DCI indicating the release of the SPS PDSCH, the UE does not need to receive data of the SPS PDSCH configuration indicated by the DCI indicating the release of the SPS PDSCH.

It should be noted that one HARQ-ACK codebook may be composed of one or more HARQ-ACK first-level sub-codebooks. One HARQ-ACK first-level sub-codebook may be composed of one or more HARQ-ACK second-level sub-codebooks. One HARQ-ACK second-level sub-codebook may be composed of one or more HARQ-ACK third-level sub-codebooks. One HARQ-ACK tertiary sub-codebook may be composed of one or more HARQ-ACK quaternary sub-codebooks.

It should be noted that the symbol in this embodiment may be an OFDM symbol.

The method defines a method for generating the HARQ-ACK codebook of the SPS PDSCH by the UE, defines a mode for generating the HARQ-ACK codebook by the UE under different conditions, ensures the understanding consistency of the base station and the UE on the HARQ-ACK codebook, and increases the reliability of the HARQ-ACK codebook. Meanwhile, the base station can increase the scheduling flexibility and improve the network performance through parameter configuration.

In another embodiment, when the UE receives DCI indicating a certain SPS PDSCH release (e.g., DCI indicating SPS PDSCH configuration # i release, i being an integer greater than or equal to 0), the UE may not expect to receive data of SPS PDSCH configuration # i after DCI Q3 OFDM symbols indicating SPS PDSCH configuration # i release by protocol specification, and/or higher layer signaling. Q3 may be defined as an OFDM symbol interval between the end position of the last OFDM symbol of DCI indicating the release of SPS PDSCH configuration # i and the start position of the first OFDM symbol of SPS PDSCH. Q3 may also be defined as the OFDM symbol interval between the end position of the last OFDM symbol of DCI indicating the release of SPS PDSCH configuration # i and the end position of the last OFDM symbol of SPS PDSCH. Q3 may also be defined as an OFDM symbol interval indicating the starting position of the first OFDM symbol of DCI released for SPS PDSCH configuration # i and the starting position of the first OFDM symbol of SPS PDSCH. Q3 may also be defined as the OFDM symbol interval between the starting position of the first OFDM symbol of DCI indicating the release of SPS PDSCH configuration # i and the ending position of the last OFDM symbol of SPS PDSCH.

When the UE receives DCI indicating a certain SPS PDSCH release (for example, DCI indicating SPS PDSCH configuration # i release, i being an integer greater than or equal to 0), the UE may not expect to receive data of SPS PDSCH configuration # i after PUCCH Q4 OFDM symbols of HARQ-ACK feedback of DCI indicating SPS PDSCH configuration # i release through protocol specification and/or higher layer signaling. Q4 may be defined as an OFDM symbol interval between the end position of the last OFDM symbol of PUCCH and the start position of the first OFDM symbol of SPS PDSCH indicating HARQ-ACK feedback of DCI released for SPS PDSCH configuration # i. Q4 may also be defined as the OFDM symbol interval between the end position of the last OFDM symbol of PUCCH and the end position of the last OFDM symbol of SPS PDSCH indicating HARQ-ACK feedback of DCI released for SPS PDSCH configuration # i. Q4 may also be defined as the OFDM symbol interval between the starting position of the first OFDM symbol of PUCCH and the starting position of the first OFDM symbol of SPS PDSCH indicating HARQ-ACK feedback of DCI released for SPS PDSCH configuration # i. Q4 may also be defined as the OFDM symbol interval between the starting position of the first OFDM symbol of PUCCH and the ending position of the last OFDM symbol of SPS PDSCH indicating HARQ-ACK feedback of DCI released for SPS PDSCH configuration # i. It should be noted that, for different types of HARQ-ACK codebooks, the UE behavior may be different, and specifically, the Q4 of each HARQ-ACK codebook may be configured through protocol specification and/or higher layer signaling.

When the UE receives DCI indicating a certain SPS PDSCH release (for example, DCI indicating SPS PDSCH configuration # i release, i being an integer greater than or equal to 0), the UE may not expect to feed HARQ-ACK information back to data of SPS PDSCH configuration # i after 5 OFDM symbols of DCI indicating SPS PDSCH configuration # i release through protocol specification and/or higher layer signaling configuration. Q5 may be defined as an OFDM symbol interval between the end position of the last OFDM symbol of DCI indicating the release of SPS PDSCH configuration # i and the start position of the first OFDM symbol of SPS PDSCH. Q5 may also be defined as the OFDM symbol interval between the end position of the last OFDM symbol of DCI indicating the release of SPS PDSCH configuration # i and the end position of the last OFDM symbol of SPS PDSCH. Q5 may also be defined as the OFDM symbol interval between the start position of the first OFDM symbol of DCI indicating the release of SPS PDSCH configuration # i and the start position of the first OFDM symbol of SPS PDSCH. Q5 may also be defined as the OFDM symbol interval between the start position of the first OFDM symbol of DCI indicating the release of SPS PDSCH configuration # i and the symbol end position of the last OFDM symbol of SPS PDSCH. It should be noted that, for different types of HARQ-ACK codebooks, the UE behavior may be different, and specifically, the Q5 of each HARQ-ACK codebook may be configured through protocol specification and/or higher layer signaling.

When the UE receives DCI indicating a certain SPS PDSCH release (for example, DCI indicating SPS PDSCH configuration # i release, i being an integer greater than or equal to 0), the UE may not expect data feedback HARQ-ACK information of the SPS PDSCH configuration # i after PUCCH Q6 OFDM symbols for HARQ-ACK feedback of DCI indicating SPS PDSCH configuration # i release through protocol specification and/or higher layer signaling. Q6 may be defined as an OFDM symbol interval between the end position of the last OFDM symbol of PUCCH and the start position of the first OFDM symbol of SPS PDSCH indicating HARQ-ACK feedback of DCI released for SPS PDSCH configuration # i. Q6 may also be defined as the OFDM symbol interval between the end position of the last OFDM symbol of PUCCH and the end position of the last OFDM symbol of SPS PDSCH indicating HARQ-ACK feedback of DCI released for SPS PDSCH configuration # i. Q6 may also be defined as the OFDM symbol interval between the starting position of the first OFDM symbol of PUCCH and the starting position of the first OFDM symbol of SPS PDSCH indicating HARQ-ACK feedback of DCI released for SPS PDSCH configuration # i. Q6 may also be defined as the OFDM symbol interval between the starting position of the first OFDM symbol of PUCCH and the ending position of the last OFDM symbol of SPS PDSCH indicating HARQ-ACK feedback of DCI released for SPS PDSCH configuration # i. It should be noted that, for different types of HARQ-ACK codebooks, the UE behavior may be different, and specifically, the Q6 of each HARQ-ACK codebook may be configured through protocol specification and/or higher layer signaling.

When the UE receives DCI indicating a certain SPS PDSCH release (e.g., DCI indicating SPS PDSCH configuration # i release, i being an integer greater than or equal to 0), the UE may also feed back HARQ-ACK information for data of SPS PDSCH configuration # i within Q7 OFDM symbols of the DCI indicating SPS PDSCH configuration # i release through protocol specification and/or higher layer signaling configuration. Q7 may be defined as an OFDM symbol interval between the end position of the last OFDM symbol of DCI indicating the release of SPS PDSCH configuration # i and the start position of the first OFDM symbol of SPS PDSCH. Q7 may also be defined as the OFDM symbol interval between the end position of the last OFDM symbol of DCI indicating the release of SPS PDSCH configuration # i and the end position of the last OFDM symbol of SPS PDSCH. Q7 may also be defined as the OFDM symbol interval between the starting position of the first OFDM symbol of DCI indicating the release of SPS PDSCH configuration # i and the starting position of the first OFDM symbol of SPS PDSCH. Q7 may also be defined as the OFDM symbol interval between the starting position of the first OFDM symbol of DCI indicating the release of SPS PDSCH configuration # i and the ending position of the last OFDM symbol of SPS PDSCH. It should be noted that, for different types of HARQ-ACK codebooks, the UE behavior may be different, and specifically, the Q7 of each HARQ-ACK codebook may be configured through protocol specification and/or higher layer signaling.

When the UE receives DCI indicating a certain SPS PDSCH release (e.g., DCI indicating SPS PDSCH configuration # i release, i being an integer greater than or equal to 0), the UE may also feed back HARQ-ACK information for data of SPS PDSCH configuration # i before PUCCH Q8 OFDM symbols indicating HARQ-ACK feedback of DCI indicating SPS PDSCH configuration # i release through protocol specification and/or higher layer signaling. Q8 may be defined as an OFDM symbol interval between the end position of the last OFDM symbol of PUCCH and the start position of the first OFDM symbol of SPS PDSCH indicating HARQ-ACK feedback of DCI released for SPS PDSCH configuration # i. Q8 may also be defined as the OFDM symbol interval between the end position of the last OFDM symbol of PUCCH and the end position of the last OFDM symbol of SPS PDSCH indicating HARQ-ACK feedback of DCI released for SPS PDSCH configuration # i. Q8 may also be defined as the OFDM symbol interval between the starting position of the first OFDM symbol of PUCCH and the starting position of the first OFDM symbol of SPS PDSCH indicating HARQ-ACK feedback of DCI released for SPS PDSCH configuration # i. Q8 may also be defined as the OFDM symbol interval between the starting position of the first OFDM symbol of PUCCH and the ending position of the last OFDM symbol of SPS PDSCH indicating HARQ-ACK feedback of DCI released for SPS PDSCH configuration # i. It should be noted that, for different types of HARQ-ACK codebooks, the UE behavior may be different, and specifically, the Q8 of each HARQ-ACK codebook may be configured through protocol specification and/or higher layer signaling.

It should be noted that in the present embodiment, Q3, Q4, Q5, Q6, Q7, and Q8 may take different values according to different UE capabilities and/or different SCS. The units of Q3, Q4, Q5, Q6, Q7, and Q8 in this embodiment may also be slots.

It should be noted that, the DCI in the embodiment may be carried by a PDCCH, and the transmission time of the DCI in this embodiment may be equal to the transmission time of the PDCCH.

The method defines the behavior of the UE after receiving the DCI indicating the release of a certain SPS PDSCH, confirms the understanding consistency of the base station and the UE to the HARQ-ACK codebook, and increases the reliability of the HARQ-ACK codebook. Meanwhile, the base station can increase the scheduling flexibility and improve the network performance through parameter configuration.

In another embodiment, the UE is configured with an activated SPS PDSCH configuration in a certain serving cell c. This SPS PDSCH configuration is configured with the number of repeated transmissions N (N is an integer greater than or equal to 1) between slots. This SPS PDSCH configuration is configured with a period P, which is a unit of a slot (P is an integer greater than or equal to 1). Optionally, this SPS PDSCH configuration may also be configured with a number of repeated transmissions M (M is an integer greater than or equal to 1, e.g., M is 2) within the slot, and if not configured, the default number of transmissions is 1.

When N is greater than 1, and/or M is greater than 1, one dynamically scheduled PDSCH may cover one or more instances (occasions) of this SPS PDSCH repeated transmission. It should be noted that, here, the example refers to one transmission in the SPS PDSCH repeated transmission. Optionally, the DCI of the dynamically scheduled PDSCH needs to satisfy a certain timing relationship with the SPS PDSCH covered by the dynamically scheduled PDSCH.

Specifically, when the dynamically scheduled PDSCH may cover an instance of the SPS PDSCH repeated transmission, it may be specified that DCI of the dynamically scheduled PDSCH requires 1 OFDM symbols earlier than the covered instance a of the SPS PDSCH, i.e., in the same serving cell, the UE does not expect to receive a dynamically scheduled PDSCH partially or completely overlapping with an instance of an SPS PDSCH in the time domain unless the DCI of the dynamically scheduled PDSCH ends earlier than the start time a1 OFDM symbols of the instance of the SPS PDSCH (where the instance refers to an instance overlapping with the dynamically scheduled PDSCH in the time domain).

In particular, when the dynamically scheduled PDSCH may cover more than one instance of this SPS PDSCH repeat transmission, for example, the dynamically scheduled PDSCH is transmitted on a slot-by-slot basis. It may be specified that DCI for a dynamically scheduled PDSCH requires 2 OFDM symbols earlier than the first covered instance a of this SPS PDSCH, i.e., in the same serving cell, a UE does not expect to receive a dynamically scheduled PDSCH that partially or completely overlaps in the time domain with an instance of the SPS PDSCH unless the DCI for this dynamically scheduled PDSCH ends earlier than the start time a2 OFDM symbols of the first instance in this instance of the SPS PDSCH (this instance refers to an instance that overlaps in the time domain with the dynamically scheduled PDSCH).

In the case of a semi-static HARQ-ACK codebook, such as the 3GPP TS38.213 type-1 HARQ-ACK codebook, the UE needs to feed back HARQ-ACK information for the SPS PDSCH when it receives at least one instance of a SPS PDSCH repeated transmission. The UE does not expect the SPS PDSCH in the HARQ-ACK codebook to correspond to the same bits as the dynamically scheduled PDSCH.

In the case of a dynamic HARQ-ACK codebook, such as the 3GPP TS38.213 type-2 HARQ-ACK codebook, when the UE receives at least one instance of a SPS PDSCH repeated transmission, it needs to feed back HARQ-ACK information for the SPS PDSCH.

It should be noted that the time interval in this embodiment may also be defined as a time interval between the start time of the DCI and the start time of the SPS PDSCH, the time interval in this embodiment may also be defined as a time interval between the start time of the DCI and the end time of the SPS PDSCH, and the time interval in this embodiment may also be defined as a time interval between the end time of the DCI and the start time of the SPS PDSCH. The unit of the time interval in the present embodiment may also be a slot.

It should be noted that in the present embodiment, a1, a2 and other time intervals may take different values according to different UE capabilities and/or different SCS. The units of a1, a2, and other time intervals in this embodiment may also be time slots. In this embodiment, a1, a2 and other time intervals may be defined by a protocol, and may be configured by higher layer signaling.

It should be noted that the DCI in this embodiment may be carried by a PDCCH, and the transmission time of the DCI in this embodiment may be equal to the transmission time of the PDCCH.

The method specifies the timing relation which needs to be satisfied by the DCI of the dynamic scheduling PDSCH and the SPS PDSCH when the SPS PDSCH is repeatedly transmitted under the condition that the UE is configured with an activated SPS PDSCH configuration in a certain serving cell c, and the behavior of the UE after receiving the DCI of the dynamic scheduling PDSCH defines the understanding consistency of the base station and the UE on the HARQ-ACK codebook, and increases the reliability of the HARQ-ACK codebook. Meanwhile, the base station can increase the scheduling flexibility and improve the network performance through parameter configuration.

In another embodiment, the UE is configured with an activated SPS PDSCH configuration in a certain serving cell c. This SPS PDSCH configuration is configured with the number of repeated transmissions N1 between slots (N1 is an integer of 1 or more). This SPS PDSCH configuration is configured with a periodicity of P1, the unit of P1 being a slot (P1 being an integer equal to or greater than 1). The UE can receive only one unicast PDSCH in one slot of one serving cell.

When N1 is greater than 1, one dynamically scheduled PDSCH in one time slot may cancel one instance (occasion) of this SPS PDSCH repeat transmission. It should be noted that, the example herein refers to one transmission in the SPS PDSCH repeated transmission. Optionally, the DCI for the dynamically scheduled PDSCH may need to satisfy a timing relationship with the SPS PDSCH cancelled by the dynamically scheduled PDSCH.

Specifically, when the dynamically scheduled PDSCH can cancel an instance of the SPS PDSCH repeated transmission, it may be specified that the DCI of the dynamically scheduled PDSCH requires 3 OFDM symbols earlier than the canceled instance a of the SPS PDSCH, i.e. when the UE can only receive a unicast PDSCH in a slot of a serving cell, the UE does not expect to receive an instance of the dynamically scheduled PDSCH and an SPS PDSCH in a slot of the same serving cell unless the DCI of the dynamically scheduled PDSCH ends earlier than the start time A3 OFDM symbols of the instance of the SPS PDSCH (where the instance refers to the instance of the SPS PDSCH in the same slot as the dynamically scheduled PDSCH). If the DCI for this dynamically scheduled PDSCH ends earlier than the start time a3 OFDM symbols for this instance of SPS PDSCH, the UE only receives the dynamically scheduled PDSCH in this time slot, and the UE does not receive this instance of SPS PDSCH in this time slot.

In particular, when the dynamically scheduled PDSCH is in the same time slot as more than one instance of this SPS PDSCH repeated transmission, for example, the dynamically scheduled PDSCH is transmitted on a time slot basis. It may be specified that DCI for a dynamically scheduled PDSCH requires 4 OFDM symbols earlier than the first instance a in the cancelled SPS PDSCH instance, i.e., in the same slot of the same serving cell, the UE does not expect to receive one dynamically scheduled PDSCH and an instance of the SPS PDSCH unless the DCI for this dynamically scheduled PDSCH ends earlier than the start time a4 OFDM symbols of the first instance in this instance of the SPS PDSCH (the first instance indicates an instance of the SPS PDSCH in the first slot with the dynamically scheduled PDSCH). If the DCI for this dynamically scheduled PDSCH ends earlier than the start time a4 OFDM symbols for the first one of the instances of this SPS PDSCH, the UE receives only the dynamically scheduled PDSCH and not the SPS PDSCH in these time slots.

In the case of a dynamic HARQ-ACK codebook, such as the 3GPP TS38.213 type-2 HARQ-ACK codebook, when the UE receives at least one instance of a SPS PDSCH repeated transmission, it needs to feed back HARQ-ACK information for the SPS PDSCH. When the UE does not receive any instance of SPS PDSCH retransmission, it may be further specified that the UE needs to feed back HARQ-ACK information for SPS PDSCH cancelled by the dynamically scheduled PDSCH, which is NACK in this case, or it may be specified that the UE does not need to feed back HARQ-ACK information for SPS PDSCH cancelled by the dynamically scheduled PDSCH.

It should be noted that in the present embodiment, A3, a4 and other time intervals may take different values according to different UE capabilities and/or different SCS. The units of A3, a4, and other time intervals in this embodiment may also be time slots. In this embodiment, A3, a4 and other time intervals may be defined by a protocol, and may be configured by higher layer signaling.

It should be noted that, in this embodiment, the dynamically scheduled PDSCH and the cancelled SPS PDSCH may or may not overlap in the time domain.

It should be noted that, this embodiment is also applicable to the case that the UE is configured with multiple SPS PDSCH configurations, and for each time slot, the UE selects the SPS PDSCH with the smallest SPD PDSCH number first, and if the DCI of the dynamic scheduling PDSCH cancels the SPS PDSCH of a certain time slot, the DCI of the dynamic scheduling PDSCH and the SPS PDSCH with the smallest time slot number should satisfy the timing relationship specified in this embodiment.

The method specifies that under the condition that the UE is configured with an activated SPS PDSCH configuration in a certain serving cell c and can only receive a unicast PDSCH in one time slot of the serving cell, when the SPS PDSCH is repeatedly transmitted, the timing relation which needs to be met by the DCI of the PDSCH and the SPS PDSCH is dynamically scheduled, and the behavior of the UE after receiving the DCI of the PDSCH is dynamically scheduled, so that the understanding consistency of the base station and the UE for the HARQ-ACK codebook is determined, and the reliability of the HARQ-ACK codebook is increased. Meanwhile, the base station can increase the scheduling flexibility and improve the network performance through parameter configuration.

One dynamically scheduled PDSCH in one time slot may cancel all instances (occasions) in this SPS PDSCH repeat transmission. It should be noted that, the example herein refers to one transmission in the SPS PDSCH repeated transmission. Optionally, the DCI for the dynamically scheduled PDSCH may need to satisfy a timing relationship with the SPS PDSCH cancelled by the dynamically scheduled PDSCH.

Specifically, when the dynamically scheduled PDSCH may cancel all instances in the SPS PDSCH repeated transmission, it may be specified that the DCI of the dynamically scheduled PDSCH requires 5 OFDM symbols earlier than the canceled first instance a of the SPS PDSCH, i.e. in case the UE can only receive one unicast PDSCH in one slot of one serving cell, the UE does not expect to receive one dynamically scheduled PDSCH and one SPS PDSCH instance in one slot of the same serving cell unless the DCI of the dynamically scheduled PDSCH ends earlier than the start time a5 OFDM symbols of the first instance of the SPS PDSCH. If the DCI for this dynamically scheduled PDSCH ends earlier than the start time a5 OFDM symbols for the first instance of this SPS PDSCH, the UE only receives the dynamically scheduled PDSCH in this time slot.

In case of a dynamic HARQ-ACK codebook, e.g. a 3GPP TS38.213 type-2 HARQ-ACK codebook, the UE may be specified to need to feed back HARQ-ACK information for SPS PDSCH cancelled by dynamically scheduled PDSCH, which is NACK in this case, or may be specified not to need to feed back HARQ-ACK information for SPS PDSCH cancelled by dynamically scheduled PDSCH.

It should be noted that a5 and other time intervals in this embodiment may take different values according to different UE capabilities and/or different SCS. The unit of a5 and other time intervals in this embodiment may also be a time slot. The a5 and other time intervals in this embodiment may be specified by a protocol, or may be configured by higher layer signaling.

It should be noted that this embodiment is also applicable to the case that the UE is configured with multiple SPS PDSCH configurations, and for each time slot, the UE selects the SPS PDSCH with the smallest SPD PDSCH number first, and if the DCI of the dynamic scheduling PDSCH cancels the SPS PDSCH of a certain time slot, the DCI of the dynamic scheduling PDSCH and the SPS PDSCH with the smallest time slot number should satisfy the timing relationship specified in this embodiment.

In another embodiment, the UE is configured with multiple activated SPS PDSCH configurations in a certain serving cell c. Optionally, each SPS PDSCH configuration # i (i is an integer greater than or equal to 0) is configured with the number of repeated transmissions N between slots_i(N_iAn integer greater than or equal to 1), the default number of transmissions is 1 if not configured. Optionally, each SPS PDSCH configuration # i is configured with a periodicity P_i，P_iHas a unit of time slot (P)_iAn integer greater than or equal to 1), the default number of transmissions is 1 if not configured. Optionally, each SPS PDSCH configuration # i may also be configured with the number of repeated transmissions M within the slot_i,(M_iAn integer of 1 or more), e.g., M_i2, default number of transmissions if not configuredThe number is 1. For SPS PDSCH feeding back HARQ-ACK information in the same uplink time slot, the HARQ-ACK information needs to be multiplexed in the same HARQ-ACK codebook.

N per SPS PDSCH configuration # i_iAnd/or M_iThe secondary repeated transmissions are a set (bundle), and when two or more repeated transmission sets of different SPS PDSCH configurations overlap in the time domain, the repeated transmission sets of SPS PDSCH configurations belong to the same group (group).

In the first method, the UE in each group only receives the repeated transmission set with the SPS PDSCH configuration with the smallest number. The repeated transmission set of one SPS PDSCH configuration in one group needs to be satisfied with at least overlapping with the repeated transmission set of another SPS PDSCH configuration in the time domain.

The second method comprises the following steps:

step 1: the UE in each group receives a repeated transmission set configured by the SPS PDSCH with the minimum number;

step 2: deleting the repeated transmission set of the SPS PDSCH configuration with the minimum number and the repeated transmission set of the SPS PDSCH configuration with the minimum number which has the minimum number and is overlapped with the repeated transmission set of the SPS PDSCH configuration with the minimum number on the time domain from the group, wherein the rest repeated transmission sets of the SPS PDSCH configuration form a new group;

and step 3: and repeating the step 1 and the step 2 until the number of the configured repeated transmission sets of the SPS PDSCHs in the group is 0 or the number of the SPS PDSCHs received by the UE in a certain time slot reaches the maximum value of the number of the unicast PDSCHs which can be received by the UE in one time slot.

It should be noted that, if the UE can only receive one unicast PDSCH in one time slot for one serving cell, and if there are multiple activated SPS PDSCHs in one time slot, whether the SPS PDSCHs overlap in the time domain or not, it is considered that the SPS PDSCHs overlap in the time domain are to be processed according to the method of the present embodiment. That is, the UE receives only the repeated transmission set of the least numbered SPS PDSCH configuration.

It should be noted that, when the dynamically scheduled PDSCH and the multiple SPS PDSCH configured repeated transmissions overlap in the time domain, according to this embodiment, the UE-received SPS PDSCH configured repeated transmission set is first selected, and then the DCI of the dynamically scheduled PDSCH and the UE-received SPS PDSCH configured repeated transmission set also need to satisfy the timing relationship specified in other embodiments of the present invention. Alternatively, the DCI for the dynamically scheduled PDSCH and the set of repeated transmissions for each SPS PDSCH configuration may also need to satisfy the timing relationships specified in other embodiments of the present invention.

It should be noted that, for a certain serving cell, when the total number of PDSCHs that are dynamically scheduled and SPS PDSCHs that are selected to be received by the UE first according to this embodiment and configured in a certain time slot is greater than the number of unicast PDSCHs that can be received by the UE in a time slot, the dynamically scheduled PDSCH may cancel the duplicate transmission set configured by the SPS PDSCH. The duplicate transmission set of SPS PDSCH configurations that overlap with the dynamically scheduled PDSCH in the time domain is first cancelled. And then, if the total number of PDSCHs in a certain time slot is larger than the number of unicast PDSCHs which can be received by the UE in the time slot, the cancelled sequence is sequenced according to the SPS PDSCH numbers from high to low until the number of the unicast PDSCHs received by the UE in the time slot is equal to the number of the unicast PDSCHs which can be received by the UE in the time slot. The DCI for the dynamically scheduled PDSCH and the configured repeated transmission set of SPS PDSCH received by the UE also need to satisfy the timing relationship specified in other embodiments of the present invention. Alternatively, the DCI for the dynamically scheduled PDSCH and the set of repeated transmissions for each SPS PDSCH configuration may also need to satisfy the timing relationships specified in other embodiments of the present invention.

It should be noted that, when the UE further receives DCI indicating release of a certain SPS PDSCH, according to this embodiment, the UE first selects a retransmission set configured by the SPS PDSCH received by the UE, and then receives the retransmission set of the SPS PDSCH and feeds back HARQ-ACK information to the retransmission set of the SPS PDSCH according to the timing relationship between SPS PDSCH reception and HARQ-ACK feedback and DCI indicating release of the SPS PDSCH, which is specified in other embodiments of the present invention.

The present embodiment specifies the behavior of the UE when the UE configures multiple activated SPS PDSCH configurations and the repeated transmissions of these SPS PDSCH overlap in the time domain. The embodiment treats the repeated transmission set configured by the SPS PDSCH as a whole, and is easy to realize. Compared with the method II, the method I has lower complexity and is easy to realize. The second method has better performance than the first method, and can maximize the number of SPS PDSCHs that the UE can receive in a certain time slot.

In another embodiment, the UE is configured with multiple activated SPS PDSCH configurations in a certain serving cell c. Optionally, each SPS PDSCH configuration # i is configured with an inter-slot number of repeated transmissions N_i(N_iAn integer greater than or equal to 1), the default number of transmissions is 1 if not configured. Optionally, each SPS PDSCH configuration # i is configured with a periodicity P_i，P_iHas a unit of time slot (P)_iAn integer greater than or equal to 1), the default number of transmissions is 1 if not configured. Optionally, each SPS PDSCH configuration # i may also be configured with the number of repeated transmissions M within the slot_i(M_iIs an integer of 1 or more, e.g. M_i2) and if not configured the default number of transmissions is 1. For SPS PDSCH feeding back HARQ-ACK information in the same uplink time slot, the HARQ-ACK information needs to be multiplexed in the same HARQ-ACK codebook.

When there are two or more instances of repeated transmissions of different SPS PDSCH configurations in a certain time slot that overlap in the time domain (an instance refers to one of SPS PDSCH repeated transmissions), these instances of repeated transmissions of SPS PDSCH configurations belong to the same group (group).

Method one, the UE receives only the instances of the duplicate transmission set of the SPS PDSCH configuration with the smallest number in each group of the timeslot. The instance of the repeated transmission of one SPS PDSCH configuration in one group needs to be satisfied with at least an overlap in time domain with the instance of the repeated transmission of another SPS PDSCH configuration. If the instance of the repeated transmission of the SPS PDSCH configuration is not the instance of the repeated transmission of the first or last SPS PDSCH configuration in the group, it is also required that both the first OFDM symbol and the last OFDM symbol of the instance of the repeated transmission of the SPS PDSCH configuration at least overlap in the time domain with the instances of the repeated transmission of the other SPS PDSCH configuration.

The second method comprises the following steps:

step 1: the UE in each group receives the repeated transmission example of the SPS PDSCH configuration with the minimum number;

step 2: deleting the repeated transmission example of the SPS PDSCH configuration with the minimum number and the repeated transmission example of the SPS PDSCH configuration with the minimum number which has the overlapping time domain with the repeated transmission example of the SPS PDSCH configuration with the minimum number from the group, wherein the rest repeated transmission examples of the SPS PDSCH configuration form a new group;

and step 3: and repeating the first step and the second step until the number of the repeated transmission examples configured by the SPS PDSCH in the group is 0 or the number of the SPS PDSCHs received by the UE reaches the maximum value of the number of unicast PDSCHs which can be received by the UE in one time slot.

It should be noted that, if the UE can only receive one unicast PDSCH in one time slot for one serving cell, if there are multiple activated SPS PDSCHs in one time slot, whether the SPS PDSCHs overlap in the time domain or not, it is considered that the SPS PDSCHs overlap in the time domain to be processed according to the method of the present embodiment. That is, the UE receives only the repeated transmission set of the least numbered SPS PDSCH configuration.

It should be noted that, for a certain time slot of a certain serving cell, when the dynamically scheduled PDSCH and the repeated transmission of one or more SPS PDSCH configurations overlap in the time domain, according to this embodiment, an example of the repeated transmission of the SPS PDSCH configuration received by the UE at the time slot is first selected, and then an example of the repeated transmission of the DCI of the dynamically scheduled PDSCH and the SPS PDSCH configuration received by the UE needs to satisfy the timing relationship specified in other embodiments of the present invention. Alternatively, the instances of repeated transmission of the DCI for the dynamically scheduled PDSCH and each SPS PDSCH configuration also need to satisfy the timing relationships specified in other embodiments of the present invention.

It should be noted that, for a certain serving cell, when the total number of PDSCHs that are dynamically scheduled and SPS PDSCHs that are first selected to be received by the UE and configured in a certain time slot is greater than the number of unicast PDSCHs that can be received by the UE in a time slot according to this embodiment, the dynamically scheduled PDSCH may cancel the example of repeated transmission of SPS PDSCH configuration. The instance of repeated transmission of SPS PDSCH configuration that overlaps with the dynamically scheduled PDSCH in the time domain is first cancelled. And then, if the total number of PDSCHs in a certain time slot is larger than the number of unicast PDSCHs which can be received by the UE in the time slot, the cancelled sequence is sequenced according to the SPS PDSCH numbers from high to low until the number of the unicast PDSCHs received by the UE in the time slot is equal to the number of the unicast PDSCHs which can be received by the UE in the time slot. The example of repeated transmission of DCI for dynamically scheduled PDSCH and SPS PDSCH configuration received by the UE also needs to satisfy the timing relationship specified in other embodiments of the present invention. Alternatively, the instances of repeated transmission of the DCI for the dynamically scheduled PDSCH and each SPS PDSCH configuration also need to satisfy the timing relationships specified in other embodiments of the present invention.

It should be noted that, when the UE further receives DCI indicating release of a certain SPS PDSCH, according to this embodiment, the UE first selects an instance of the SPS PDSCH configuration received by the UE for repeated transmission, and then receives an instance of the SPS PDSCH repeated transmission and HARQ-ACK information fed back to the instance of the SPS PDSCH repeated transmission according to the timing relationship between the SPS PDSCH reception and HARQ-ACK feedback and the DCI indicating the release of the SPS PDSCH, which are specified in other embodiments of the present invention.

The present embodiment specifies the behavior of the UE when the UE configures multiple activated SPS PDSCH configurations and the repeated transmissions of these SPS PDSCH overlap in the time domain. In this embodiment, the repeated transmission configured by the SPS PDSCH is processed separately for each timeslot, which may improve the spectrum efficiency of the network. Compared with the method II, the method I has lower complexity and is easy to realize. The second method has better performance than the first method, and can maximize the number of SPS PDSCHs that the UE can receive in a certain time slot.

In another embodiment, there are two priorities for PDSCH: priority 0 and priority 1, wherein priority 0 is lower than priority 1. Further, the dynamically scheduled PDSCH and the SPS PDSCH are in the order of dynamically scheduled PDSCH of priority 1 higher than dynamically scheduled PDSCH of priority 1, SPS PDSCH of priority 1 higher than dynamically scheduled PDSCH of priority 0, and dynamically scheduled PDSCH of priority 0 higher than SPS PDSCH of priority 0.

If for one serving cell, the UE can only receive one unicast PDSCH in one slot. When the dynamically scheduled PDSCH can cancel the SPS PDSCH with lower priority according to the priority order specified in this embodiment, the timing relationship specified in other embodiments of the present invention needs to be satisfied. The UE expects to receive only the PDSCH with the highest priority.

If a UE can only receive W unicast PDSCHs in one timeslot for one serving cell, the timing relationship specified in other embodiments of the present invention needs to be satisfied when the dynamically scheduled PDSCH can cancel the SPS PDSCH with lower priority according to the priority order specified in this embodiment.

Specifically, the dynamically scheduled PDSCH of priority 0 may cancel the SPS PDSCH of priority 0 and cancel the SPS PDSCH that overlaps the dynamically scheduled PDSCH in the time domain first. If the total number of PDSCHs in a certain time slot is larger than the number W of unicast PDSCHs which can be received by the UE in one time slot, the cancelled sequence is sequenced according to the SPS PDSCH numbers from large to small until the number of unicast PDSCHs received by the UE in one time slot is equal to the number of unicast PDSCHs which can be received by the UE in one time slot.

Specifically, the dynamically scheduled PDSCH of priority 1 may cancel the SPS PDSCH of priority 0 and the SPS PDSCH of priority 1, and cancel the SPS PDSCH that overlaps the dynamically scheduled PDSCH in the time domain first. And if the total number of the unicast PDSCHs in a certain time slot is larger than the number W of the unicast PDSCHs which can be received by the UE in one time slot, canceling the SPS PDSCHs with the priority level of 0, wherein the cancellation sequence is ordered according to the SPS PDSCH numbers from large to small until the number of the unicast PDSCHs received by the UE in one time slot is equal to the number of the unicast PDSCHs which can be received by the UE in one time slot or the SPS PDSCHs with the priority level of 0 are all cancelled. And if the SPS PDSCHs with the priority level 0 are all cancelled and the total number of the unicast PDSCHs in a certain time slot is larger than the number W of the unicast PDSCHs which can be received by the UE in one time slot, canceling the SPS PDSCHs with the priority level 1 again, wherein the cancellation sequence is ordered according to the sequence of the SPS PDSCH numbers from large to small until the number of the unicast PDSCHs received by the UE in one time slot is equal to the number W of the unicast PDSCHs which can be received by the UE in one time slot.

It should be noted that, if the SPS PDSCH is configured with repeated transmission, the specific method for dynamically scheduling PDSCH to cancel SPS PDSCH in this embodiment may adopt the method specified in other embodiments of the present invention.

The embodiment provides a method for dynamically scheduling the PDSCH to cancel the SPS PDSCH under the condition that the PDSCH has two priorities, so that the priority sequence of the PDSCH is clarified, the timing relation for dynamically scheduling the PDSCH to cancel the SPS PDSCH is clarified, the behavior of UE is clarified, and the reliability of a network is improved.

It should be noted that the PDSCH in all embodiments of the present invention refers to a unicast PDSCH unless otherwise specified.

In another embodiment, the UE is configured with one downlink serving cell, the UE may indicate that multiple downlink DCIs of the same serving cell can be received at one PDCCH monitoring time, and when the HARQ-ACK codebook configured for the UE is a dynamic HARQ-ACK codebook, for example, a 3GPP TS38.213 Type-2 HARQ-ACK codebook. In order to solve the problem, a total DAI (downlink assignment index) field may be introduced into a downlink DCI format, for example, DCI format1_ 1 and/or DCI format1_2, and the UE may determine the HARQ-ACK codebook size according to a value indicated by a T-DAI field in the DCI format received at the last PDCCH monitoring time.

For example, it may be specified by the protocol that for DCI format1_ x (x may be 1,2, …), the downlink allocation index-number of bits is defined as follows:

4 bits: if a serving cell is configured in DL, and a higher-layer parameter pdsch HARQ ACK Codebook is dynamic or pdsch-HARQ-ACK-Codebook is enhanced dynamic-r16, and the UE reporting capability supports that N downlink DCIs of the same serving cell may be received at a PDCCH monitoring time, where N is an integer greater than 1, for example, N is equal to 2, or N is equal to 3. Where 2 MSBs (Most Significant bits) are the count DAI and 2 LSBs (Least Significant bits) are the total DAI;

alternatively, for example, it may be specified by the protocol that for DCI format1_2, the downlink allocation index-number of bits is defined as follows:

2 bits: if a serving cell is configured in DL, and a higher layer parameter pdsch HARQ ACK Codebook is dynamic or pdsch-HARQ-ACK-Codebook is enhanced dynamic-r16, and the UE reporting capability supports that N downlink DCIs of the same serving cell can be received at a PDCCH monitoring time, where N is an integer greater than 1, for example, N is equal to 2, or N is equal to 3. Wherein 1 MSB (Most Significant Bit) is the count DAI, and 1 LSB (Least Significant Bit) is the total DAI;

alternatively, for example, it may be specified by the protocol that for DCI format1_ x (x may be 1,2, …), the downlink allocation index-number of bits is defined as follows:

4 bits: if one serving cell is configured in the DL, and the HARQ-ACK codebook type is configured as a dynamic codebook or an enhanced dynamic codebook, and the UE reporting capability supports that multiple downlink DCIs of the same serving cell can be received at one PDCCH monitoring time. Where 2 MSBs (Most Significant bits) are the count DAI and 2 LSBs (Least Significant bits) are the total DAI;

4 bits: if the HARQ-ACK Codebook type is configured as a dynamic Codebook or an enhanced dynamic Codebook (e.g., higher layer parameter pdsch HARQ ACK Codebook or pdsch-HARQ-ACK-Codebook is enhanced dynamic-r16), and the UE reporting capability supports that multiple downlink DCIs of the same serving cell can be received at one PDCCH listening time. Where 2 MSBs (Most Significant bits) are the count DAI and 2 LSBs (Least Significant bits) are the total DAI.

The method provides that when the reporting capability of the UE supports that a plurality of downlink DCIs of the same serving cell can be received at one PDCCH monitoring time, the downlink DCI formats 1_1 and/or 1_2 all contain T-DAI domains, so that the reliability of an HARQ-ACK codebook can be improved, the probability of downlink data retransmission is reduced, and the spectrum efficiency of a system can be improved.

The scheme of the invention for the SPS PDSCH can also be used for uplink, for example, the Configured Grant PUSCH is preconfigured with the PUSCH.

According to one embodiment of the invention, the transmission of the HARQ-ACK codebook for all configured HARQ processes can be triggered by one CS-RNTI scrambled DCI indicating SPS PDSCH release. For example, the HARQ-ACK codebook for all configured HARQ processes may be a 3GPP TS38.213 type-3 codebook.

If the UE receives that the DCI indicating the SPS PDSCH release triggers the transmission of HARQ-ACK codebooks for all the configured HARQ processes, the UE feeds back the HARQ-ACK codebooks for all the configured HARQ processes. For example, a 3GPP TS38.213 type-3 codebook. The UE does not feed back HARQ-ACK information to the DCI indicating the SPS PDSCH release. Optionally, the DCI indicating the SPS PDSCH release may be scrambled with the CS-RNTI. Optionally, the DCI indicating the SPS PDSCH release may indicate one or more SPS PDSCH releases.

The method can trigger the transmission of the HARQ-ACK codebooks of all the configured HARQ processes through the DCI released by the SPS PDSCH, can improve the flexibility of network scheduling, can reduce the time delay of feeding back the HARQ-ACK information of all the configured HARQ processes, and can also increase the spectrum efficiency of a system. According to the method, ACK is fed back to DCI (downlink control information) implicitly indicating SPS (physical downlink shared channel) PDSCH release, the size of a HARQ-ACK codebook is reduced, PUCCH (physical uplink control channel) resources are saved, the UE transmitting power is reduced, and the interference to other UEs is reduced. When the base station receives the HARQ-ACK codebooks of all the configured HARQ processes, the UE is shown to receive the DCI which indicates the SPS PDSCH release.

In another embodiment, the UE is configured with a semi-static HARQ-ACK codebook, such as a 3GPP TS38.213 type-1 HARQ-ACK codebook. The semi-static HARQ-ACK codebook determines the size and the ordering of the HARQ-ACK codebook according to the semi-statically configured parameters.

For a certain serving cell c, on the activated BWP (sub-band width part), the number of PDSCHs that need to be fed back in a downlink time slot i is determined by the maximum value of the number of non-overlapped PDSCHs in the downlink time slot i. The Time Domain Resource occupied by the PDSCH may configure a TDRA (Time Domain Resource Allocation) table through higher layer signaling. One row in the TDRA table may indicate the number of slot intervals K0 of the PDCCH and the PDSCH, the time domain starting position and length (SLIV) of the PDSCH.

The reference point S0 of the start symbol S is defined as:

if configured as reference point for SLIV with the starting symbol of PDCCH listening time as the starting symbol, e.g. configured with parameter ReferenceofSLIV-format dciformat1_2, and when receiving PDSCH scheduled by DCI format1_2, with CRC wrapped by C-RNTI, MCS-C-RNTI, CS-RNTI, K0 is 0, PDSCH mapping type B, the starting symbol S refers to the starting symbol S0 of PDCCH listening time at which DCI format1_2 was detected;

otherwise, the start symbol S is referenced to the start instant of the slot, S₀＝0。

When the PDSCH can be transmitted repeatedly, how to determine the PDSCH that may be received in a slot is a problem to be solved.

In a first way, it can be specified by the protocol that when the UE receives a DCI format scheduled PDSCH repeated transmission, the starting symbol S is referenced to the starting time of the slot, S₀0. For example, the PDSCH repeated transmission may be a repeated transmission between slots and/or a repeated transmission within a slot. When PDSCH repeated transmission is inter-slotWhen the transmission is repeated, the number of times of the repeated transmission can be configured by high layer signaling semi-static and/or DCI dynamic indication. When the PDSCH repeated transmission is repeated transmission in a time slot, the symbol interval of 2 repeated transmissions can be configured through high-level signaling

Defaults to 0 if not configured.

For example, the reference point S0 of the start symbol S is defined as:

if configured with reference to the starting symbol of PDCCH listening time as the reference point of SLIV (e.g. configured with parameter ReferenceofSLIV-format 1_2), and when receiving PDSCH scheduled by DCI format1_2, whose CRC is wrapped by C-RNTI, MCS-C-RNTI, CS-RNTI, whose K0 is 0, and PDSCH mapping type B, and the TDRA indicated by this DCI format does not contain parameter repetitionNumber, the starting symbol S refers to the starting symbol S0 of PDCCH listening time at which DCI format1_2 was detected;

As another example, the reference point S0 of the start symbol S is defined as:

if configured with reference to the starting symbol of PDCCH listening time as the reference point of the SLIV (e.g. configured with parameter ReferenceofSLIV-fordcfiformat 1_2) and without configured parameter PDSCH-AggregationFactor, and when receiving the PDSCH scheduled by DCI format1_2, its CRC is wrapped by C-RNTI, MCS-C-RNTI, CS-RNTI, its K0 is 0, and PDSCH mapping type B, the starting symbol S refers to the starting symbol S0 at which PDCCH listening time of DCI format1_2 was detected;

As another example, the reference point S0 of the start symbol S is defined as:

if configured with reference to the starting symbol of PDCCH listening time as the reference point of SLIV (e.g. configured with parameter ReferenceofSLIV-format dciformat1_2) and the repeated transmission mode parameter is not configured as tdmschmea, and when receiving PDSCH scheduled by DCI format1_2, its CRC is wrapped by C-RNTI, MCS-C-RNTI, CS-RNTI, its K0 is 0, and PDSCH mapping type B, the starting symbol S refers to the starting symbol S0 of PDCCH listening time at which DCI format1_2 was detected;

As another example, the reference point S0 of the start symbol S is defined as:

-if configured with reference to the starting symbol of PDCCH listening time as the reference point of the SLIV (e.g. configured with parameter ReferenceofSLIV-fordcfiformat 1_2) and the parameter PDSCH-AggregationFactor is not configured in PDSCH-Config, and when receiving PDSCH scheduled by DCI format1_2, whose CRC is wrapped by C-RNTI, MCS-C-RNTI, or CRC is CS-RNTI and NDI is 1, whose K0 is 0, and PDSCH mapping type B, the starting symbol S is referenced to the starting symbol S0 of PDCCH listening time at which DCI format1_2 was detected;

if it is configured with the starting symbol of PDCCH listening time as reference point of SLIV (for example, parameter ReferenceofSLIV-fordcfiformat 1_2 is configured), and the parameter PDSCH-AggregationFactor is not configured in PDSCH-Config or SPS-Config, and when receiving PDSCH scheduled by DCI format1_2, its CRC is wrapped by CS-RNTI and NDI is 0, its K0 is 0, and PDSCH mapping type B, the starting symbol S is referenced with the starting symbol S0 of PDCCH listening time at which DCI format1_2 was detected;

It should be noted that, in this embodiment, the parameter pdsch-aggregation factor may also be a parameter pdsch-aggregation factor larger than 1.

The method makes clear how to determine the PDSCH which can be received by a time slot in the semi-static HARQ-ACK codebook. The method can ensure that the UE and the base station keep consistency for understanding the size and the sequence of the HARQ-ACK codebook, and improve the reliability of the transmission of the HARQ-ACK codebook. The situation that the base station schedules one PDSCH for repeated transmission and has no feedback bit in the semi-static HARQ-ACK codebook is avoided.

In the second mode, in the semi-static HARQ-ACK codebook, the PDSCH that may be received by one downlink timeslot may be determined by the SLIV in the TDRA table, the number of times of repeated transmission between timeslots, PDCCH monitoring time configuration, and semi-static uplink and downlink configuration. For the SLIV with K0 being 0 in the TDRA table, the extended SLIV may be determined by the PDCCH monitoring time according to the number of times of inter-slot repeated transmission. Optionally, its extended SLIV satisfies that the end symbol of PDSCH will not exceed the slot boundary. And for one SLIV with the K0 being 0 in the TDRA table, determining a possible time slot for receiving the PDCCH according to the possible value of the repeated transmission times among the time slots, and expanding the SLIV according to the possible time slot for receiving the PDCCH and the initial symbol of the PDCCH monitoring time. Or, the SLIV is expanded according to the starting symbol of the PDCCH monitoring time on all the time slots. Optionally, whether the extended SLIV is a valid SLIV may be determined according to the configuration of the uplink and downlink frame structures, or whether the extended SLIV is a valid SLIV may be determined according to the configuration of the uplink and downlink frame structures and the number of times of repeated transmission. The valid extended SLIV is added to the TDRA table. And the UE determines the PDSCH which can be received according to the SLIV in the extended TDRA table.

Or, if the retransmission type is configured as intra-slot retransmission, the PDSCH possibly received by one downlink slot in the semi-static HARQ-ACK codebook may be determined by the SLIV in the TDRA table, the symbol interval of 2 retransmissions

And PDCCH monitoring time configuration and semi-static uplink and downlink configuration are determined. Optionally, symbol spacing according to extended SLIV and 2-time repeated transmission

The determined end position of the last repeated transmission does not exceed the slot boundary. Optionally, whether the extended SLIV is a valid SLIV may also be determined according to the configuration of the uplink and downlink frame structures. The valid extended SLIV is added to the TDRA table. And the UE determines the PDSCH which can be received according to the SLIV in the extended TDRA table.

The method determines the PDSCH which is possibly received by a downlink time slot in a semi-static HARQ-ACK codebook at the PDCCH monitoring time based on the repeated transmission times among the time slots. The situation that the base station schedules one PDSCH for repeated transmission and has no feedback bit in the semi-static HARQ-ACK codebook is avoided. The method can ensure that the UE and the base station keep consistency for understanding the size and the sequence of the HARQ-ACK codebook, and improve the reliability of the transmission of the HARQ-ACK codebook. Compared with the first mode, the method increases the scheduling flexibility on the premise of not increasing DCI bits.

In the third mode, it may be specified by the protocol that, when the UE configures the semi-static HARQ-ACK codebook, the reference point S0 of the start symbol S in the downlink TDRA table is 0, that is, the reference point is referred to the downlink timeslot start position.

For example, the reference point S0 of the start symbol S is defined as:

-if configured with reference to the starting symbol of PDCCH listening time as reference point of SLIV (e.g. configured with parameter ReferenceofSLIV-fordcfiformat 1_2) and HARQ-ACK Codebook type as dynamic Codebook (e.g. PDSCH-HARQ-ACK-Codebook parameter configured as dynamic, and/or enhanced dynamic), and when receiving PDSCH scheduled by DCI format1_2, with CRC wrapped by C-RNTI, MCS-C-RNTI, CS-RNTI, K0 being 0, PDSCH mapping type B, starting symbol S is referenced to the starting symbol S0 of PDCCH listening time at which DCI format1_2 was detected;

As another example, the reference point S0 of the start symbol S is defined as:

if configured with reference to the starting symbol of PDCCH listening time as the reference point of the SLIV (e.g. configured with parameter ReferenceofSLIV-fordcfiformat 1_2) and the HARQ-ACK Codebook type is not a semi-static Codebook (e.g. the PDSCH-HARQ-ACK-Codebook parameter is not configured as semi-static), and when receiving a PDSCH scheduled by DCI format1_2, with CRC wrapped by C-RNTI, MCS-C-RNTI, CS-RNTI, K0 ═ 0, PDSCH mapping type B, the starting symbol S is referenced to the starting symbol S0 of PDCCH listening time at which DCI format1_2 was detected;

In another embodiment, the UE is configured with a semi-static HARQ-ACK codebook, such as a 3GPP TS38.213 type-1 HARQ-ACK codebook. HARQ-ACK bits corresponding to the PDSCH in the semi-static HARQ-ACK codebook are determined by time domain resources of the PDSCH. And the HARQ-ACK bit corresponding to the PDSCH in the semi-static HARQ-ACK codebook of the DCI indicating the SPS PDSCH release is determined by the time domain resource occupied by the SPS PDSCH released by the DCI. If one DCI indicating the SPS PDSCH release indicates a plurality of SPS PDSCHs to release, the HARQ-ACK bit corresponding to the PDSCH in the semi-static HARQ-ACK codebook is determined by the time domain resource occupied by the SPS PDSCH with the minimum number released by the HARQ-ACK bit. Because the period of the SPS PDSCH may not be the same as the period configured by the uplink and downlink frame structures, the time domain resource occupied by the SPS PDSCH with the smallest number released may be all uplink in the time slot in which the DCI for indicating the release of the SPS PDSCH is received in a certain downlink time slot, and at this time, no corresponding bit in the HARQ-ACK codebook is used to feed back the DCI for indicating the release of the SPS PDSCH. The bits of the DCI indicating the SPS PDSCH release may be determined by HARQ-ACK codebook feedback in the following manner.

The UE receives a DCI in a downlink time slot to indicate the release of a plurality of SPS PDSCHs, and the bits of the DCI in the semi-static HARQ-ACK are the corresponding bits of the SPS PDSCH with the smallest number in the HARQ-ACK codebook, which is possibly received by the current time slot and is indicated to be released by the DCI. Or, the bits of the DCI in the semi-static HARQ-ACK are determined by the time domain resource of the SPS PDSCH with the smallest number among the SPS PDSCHs released by the DCI and possibly received by the current time slot. Or the position of the DCI in the semi-static HARQ-ACK is determined by the time domain resource of the SPS PDSCH with the smallest number, which is configured to be received, in the SPS PDSCH released by the DCI in the current time slot.

For example, the UE has 4 activated SPS PDSCH configurations in the time slot n, SPS PDSCHs #1, #2, #3 and #4, the UE receives a DCI in the time slot n to instruct SPS PDSCH #1 and #3 to release, the time domain resources of SPS PDSCH #1 are uplink in the time slot n, and the time domain resources of SPS PDSCH #3 are downlink in the time slot n. SPS PDSCH #1 has no corresponding bits in the HARQ-ACK codebook, and SPS PDSCH #3 has corresponding bits in the HARQ-ACK codebook. The corresponding position of the DCI indicating the SPS release in the HARQ-ACK codebook is the position corresponding to the SPS PDSCH #3 of the time slot n.

It may also be specified that the UE does not expect to receive one DCI indicating SPS PDSCH release, which has no bits to feed back in the HARQ-ACK codebook.

The method avoids the condition that one DCI indicating the SPS PDSCH release has no feedback bit in the semi-static HARQ-ACK codebook. So that the UE and the base station keep consistency for understanding the size and the sequence of the HARQ-ACK codebook, and the reliability of the HARQ-ACK codebook transmission is improved. The DCI which ensures the SPS PDSCH release can feed back HARQ-ACK information.

Fig. 3 shows a block diagram of a transceiving node of a first type according to an embodiment of the present invention.

Referring to fig. 3, a first type transceiving node 300 may comprise a transceiver 301 and a controller 302.

The transceiver 301 may be configured to transmit first type data and/or first type control signaling to a second type transceiving node and to receive a HARQ-ACK codebook from the second type transceiving node in a time unit.

The controller 302 may be a circuit application specific integrated circuit or at least one processor. The controller 102 may be configured to control the overall operation of the transceiving nodes of the first class, including controlling the transceiver 301 to transmit data of the first class and/or control signaling of the first class to transceiving nodes of the second class and to receive a HARQ-ACK codebook from a transceiving node of the second class at a determined time unit, and the HARQ-ACK codebook and the time unit are determined by the transceiving nodes of the second class based on the received data of the first class and/or control signaling of the first class.

In the following description, the BS is taken as an example (but not limited to) to describe the first type of transceiving node, the UE is taken as an example (but not limited to) to describe the second type of transceiving node, the downlink time unit is taken as a (but not limited to) to describe the first type of time unit, and the uplink time unit is taken as a (but not limited to) to describe the time unit. The first type of data and/or the first type of control signaling are illustrated with, but not limited to, downlink data and/or downlink control signaling. The HARQ-ACK codebook may be included in the second type of control signaling, which is illustrated with, but not limited to, uplink control signaling.

First, in step 401, the BS transmits downlink data and/or downlink control signaling to the UE.

In step 402, the BS receives a HARQ-ACK codebook from the UE in an uplink time unit, wherein the HARQ-ACK codebook and the uplink time unit are determined by the UE based on the received downlink data and/or downlink control signaling.

Those skilled in the art will understand that the BS decodes the HARQ-ACK codebook based on a method corresponding to the method performed by the UE in the above-described embodiment.

Those skilled in the art will appreciate that the above illustrative embodiments are described herein and are not intended to be limiting. It should be understood that any two or more of the embodiments disclosed herein may be combined in any combination. In addition, other embodiments may be utilized and other changes may be made without departing from the spirit and scope of the subject matter presented herein. It will be readily understood that the aspects of the disclosed invention, as generally described herein, and illustrated in the figures, can be arranged, substituted, combined, separated, and designed in a wide variety of different configurations, all of which are contemplated herein.

Those of skill in the art would understand that the various illustrative logical blocks, modules, circuits, and steps described in this application may be implemented as hardware, software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The various illustrative logical blocks, modules, and circuits described herein may be implemented or performed with a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

The steps of a method or algorithm described in this application may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In the alternative, the processor and the storage medium may reside as discrete components in a user terminal.

In one or more exemplary designs, the functions may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The examples of the present application are only for the purpose of easy description and to aid in a comprehensive understanding of the present application, and are not intended to limit the scope of the present application. Therefore, it should be understood that all modifications and changes or forms of modifications and changes derived from the technical idea of the present application other than the embodiments disclosed herein fall within the scope of the present application.

Claims

1. A method performed by a second type of transceiving node in a wireless communication system, comprising:

receiving first type data and/or first type control signaling from a first type transceiving node;

determining a hybrid automatic repeat request-acknowledgement (HARQ-ACK) codebook and a time unit for transmitting the HARQ-ACK codebook based on the first type of data and/or the first type of control signaling; and

and transmitting the HARQ-ACK codebook to the first type transceiving node in the determined time unit.

2. The method of claim 1, wherein the HARQ-ACK codebook is configured by protocol specification or higher layer signaling to include HARQ-ACK information for a first type of control signaling indicating a semi-persistent scheduling, SPS, physical downlink shared channel, PDSCH, release.

3. The method of claim 2, wherein the HARQ-ACK information for the first type of control signaling indicating the SPS PDSCH release is indicated by adding 1 bit after or before a HARQ-ACK codebook.

4. The method of claim 2, wherein the number of bits of HARQ-ACK information for the first type of control signaling indicating SPS PDSCH release is determined for each serving cell based on one of: the method includes the steps of protocol specification or higher layer signaling configuration, the number of the one or more SPS PDSCHs of the serving cell, the number of the one or more SPS PDSCHs release indicating configuration of the serving cell, and the number of bits of the domain indicating the HARQ process in the first type of control signaling of the serving cell.

5. The method of claim 2, wherein the number of bits of HARQ-ACK information for the first type of control signaling indicating SPS PDSCH release is configured to Q for each serving cell through higher layer signaling, indicating the latest Q HARQ-ACK information for the first type of control signaling indicating SPS PDSCH release received before the HARQ-ACK codebook is transmitted, wherein the Q is the same or different for each serving cell.

6. The method of claim 4 or 5, wherein the HARQ-ACK information of the first type of control signaling indicating the SPS PDSCH release is located in one of: after or before the HARQ-ACK information of each HARQ process of each serving cell, and after or before the HARQ-ACK information of each HARQ process of all serving cells.

7. The method according to claim 4 or 5, wherein the HARQ-ACK information of the first type of control signaling indicating the SPS PDSCH release is ordered according to the number of the serving cell and/or the number of the SPS PDSCH configuration.

8. The method of claim 2, wherein a time interval between a time unit in which the first type of control signaling indicating the SPS PDSCH release is received and a time unit determined for transmitting the HARQ-ACK information HARQ-ACK codebook containing the first type of control signaling indicating the SPS PDSCH release is configured by protocol specification or higher layer signaling.

9. The method of claim 8, wherein the time interval is no more than X slots or sub-slots or orthogonal frequency division multiplexing, OFDM, symbols, or no less than Y slots or sub-slots or OFDM symbols.

10. The method as claimed in claim 2, wherein the HARQ process corresponding to the HARQ-ACK information of the first type of control signaling indicating the SPS PDSCH release is calculated through a protocol specification or a higher layer signaling configuration or through a formula, and the HARQ-ACK information of the corresponding HARQ process in the HARQ codebook is replaced by the HARQ-ACK information of the first type of control signaling indicating the SPS PDSCH release.

11. A second type of transceiving node in a wireless communication system, comprising:

a transceiver configured to:

receiving first type data and/or first type control signaling from a first type transceiving node; and

transmitting an HARQ-ACK codebook to the first type of transceiving nodes in a time unit;

a controller configured to control overall operation of the second type of transceiving node, comprising:

determining a HARQ-ACK codebook and the time unit for transmitting the HARQ-ACK codebook based on the first type data and/or the first type control signaling; and

and controlling the transceiver to transmit the HARQ-ACK codebook to the first type transceiving node in the determined time unit.

12. A second type of transceiving node according to claim 11, wherein said controller controls said second type of transceiving node to perform a method according to claims 2-10.

13. A method performed by a first type of transceiving node in a wireless communication system, comprising:

sending first-class data and/or first-class control signaling to a second-class transceiving node;

receiving a HARQ-ACK codebook from a second type of transceiving node in a time unit;

wherein the HARQ-ACK codebook and the time unit are determined by the second type transceiving node based on the received first type data and/or first type control signaling.

14. A first type transceiving node in a wireless communication system, the first type transceiving node comprising:

a transceiver configured to transmit first type data and/or first type control signaling to a second type transceiving node and to receive a HARQ-ACK codebook from the second type transceiving node in a time unit; and

a controller configured to control overall operation of the first type of transceiving node, comprising:

the control transceiver sends first type data and/or first type control signaling to the second type transceiving nodes and receives HARQ-ACK codebooks from the second type transceiving nodes in the time unit;