CN114614951A

CN114614951A - Method and apparatus for transmitting and receiving hybrid automatic repeat request acknowledgement information

Info

Publication number: CN114614951A
Application number: CN202110559642.5A
Authority: CN
Inventors: 付景兴; 孙霏菲; 张飒
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2020-12-09
Filing date: 2021-05-21
Publication date: 2022-06-10

Abstract

A method and apparatus for transmitting hybrid automatic repeat request acknowledgement (HARQ-ACK) information are provided. The method comprises the following steps: receiving control information from a base station; receiving a plurality of downlink data from the base station based on the control information; determining resources for transmitting HARQ-ACK information for the plurality of downlink data based on control information; and transmitting the HARQ-ACK information to the base station on the determined resources, wherein the determining the resources for transmitting the HARQ-ACK information comprises: determining a first resource or resource pair for transmitting HARQ-ACK information for each of the plurality of downlink data; or determining one second resource or resource pair for transmitting HARQ-ACK information for the plurality of downlink data.

Description

Method and apparatus for transmitting and receiving hybrid automatic repeat request acknowledgement information

Technical Field

The present application relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for transmitting Hybrid Automatic Retransmission Request Acknowledgement (HARQ-ACK) feedback information, and a communication method, an apparatus, an electronic device, and a computer-readable storage medium.

Background

In order to meet the increasing demand for wireless data communication services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or quasi-5G communication systems. Accordingly, the 5G or quasi-5G communication system is also referred to as a "super 4G network" or a "post-LTE system".

The 5G communication system is implemented in a higher frequency (millimeter wave) band, for example, a 60GHz band, to achieve a higher data rate. In order to reduce propagation loss of radio waves and increase transmission distance, beamforming, massive Multiple Input Multiple Output (MIMO), full-dimensional MIMO (FD-MIMO), array antenna, analog beamforming, massive antenna technology are discussed in the 5G communication system.

Further, in the 5G communication system, development of improvement of the system network is ongoing based on advanced small cells, cloud Radio Access Network (RAN), ultra dense network, device-to-device (D2D) communication, wireless backhaul, mobile network, cooperative communication, coordinated multipoint (CoMP), reception side interference cancellation, and the like.

In 5G systems, hybrid FSK and QAM modulation (FQAM) and Sliding Window Superposition Coding (SWSC) have been developed as Advanced Coding Modulation (ACM), and filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA), and Sparse Code Multiple Access (SCMA) as advanced access techniques.

Disclosure of Invention

A method of transmitting HARQ-ACK feedback information, such as a method of transmitting HARQ-ACK of a PDSCH, is provided.

In order to achieve the purpose, the following technical scheme is adopted in the application:

according to an aspect of an embodiment of the present disclosure, there is provided a method performed by a user equipment in a wireless communication system. The method comprises the following steps: receiving control information from a base station; receiving a plurality of downlink data from the base station based on the control information; determining resources for transmitting HARQ-ACK information for the plurality of downlink data based on control information; and transmitting the HARQ-ACK information to the base station on the determined resources, wherein the determining the resources for transmitting the HARQ-ACK information comprises: determining a first resource or resource pair for transmitting HARQ-ACK information for each of the plurality of downlink data; or determining one second resource or resource pair for transmitting HARQ-ACK information for the plurality of downlink data.

According to an exemplary embodiment, in case that one second resource or resource pair for transmitting HARQ-ACK information is determined, the user equipment bundles the HARQ-ACK information of the plurality of downlink data and transmits the bundled HARQ-ACK information on the determined one second resource or resource pair.

According to an exemplary embodiment, one second resource or resource pair for transmitting HARQ-ACK information is determined based on a predetermined rule.

According to an exemplary embodiment, one second resource or resource pair for transmitting HARQ-ACK information is selected from the set of resources for transmitting HARQ-ACK information.

According to an exemplary embodiment, the bundled HARQ-ACK information is transmitted on the determined second resource if the bundled HARQ-ACK information is a negative acknowledgement NACK, and the bundled HARQ-ACK information is not transmitted if the bundled HARQ-ACK information is an acknowledgement ACK, or the bundled HARQ-ACK information is transmitted on one resource of the determined second resource pair if the bundled HARQ-ACK information is a NACK, and the bundled HARQ-ACK information is transmitted on the other resource of the determined second resource pair if the bundled HARQ-ACK information is an ACK.

According to an exemplary embodiment, the predetermined rule may include: determining a resource or resource pair corresponding to the HARQ-ACK information of the downlink data as a second resource or resource pair when the HARQ-ACK information of only one downlink data among the plurality of downlink data is a Negative Acknowledgement (NACK); and determining a resource or a resource pair corresponding to one of the more than one downlink data as a second resource or a resource pair when there is more than one downlink data of which HARQ-ACK information is NACK among the plurality of downlink data.

According to an exemplary embodiment, determining a resource or resource pair corresponding to one of the more than one downlink data as a second resource or resource pair comprises: determining a resource or resource pair corresponding to a temporally first or temporally last downlink data of the more than one downlink data as a second resource or resource pair.

According to an exemplary embodiment, the set of resources for transmitting HARQ-ACK information is determined based on a semi-static resource set determination manner or a dynamic resource set determination manner.

According to an exemplary embodiment, in case a first resource or resource pair for transmitting HARQ-ACK information is determined, the first resource or resource pair is indicated based on information on resources for uplink included in the control information or the first resource or resource pair is indicated based on information on resources for uplink and information on downlink allocation included in the control information.

According to an exemplary embodiment, in case a first resource or resource pair for transmitting HARQ-ACK information is determined, for each downlink data:

transmitting the HARQ-ACK information on the determined first resource if the HARQ-ACK information is a Negative Acknowledgement (NACK), and not transmitting the HARQ-ACK information if the HARQ-ACK information is an Acknowledgement (ACK), or

Transmitting the HARQ-ACK information on one resource of the determined first resource pair if the HARQ-ACK information is NACK, and transmitting the HARQ-ACK information on the other resource of the determined first resource pair if the HARQ-ACK information is ACK.

According to an exemplary embodiment, the user equipment and the at least one other user equipment transmit HARQ-ACK information for the same downlink data using the same first resource or resource pair or second resource or resource pair.

According to another aspect of an embodiment of the present disclosure, there is provided a method performed by a base station in a wireless communication system. The method can comprise the following steps: sending control information to the user equipment; transmitting a plurality of downlink data to the user equipment based on the control information; and receiving HARQ-ACK information from the user equipment on resources for receiving the HARQ-ACK information, wherein the resources are determined for the plurality of downlink data based on the control information and include: a first resource or resource pair determined for each of the plurality of downlink data for transmitting HARQ-ACK information; or one second resource or pair of resources determined for the plurality of downlink data for transmitting HARQ-ACK information.

According to another aspect of an embodiment of the present disclosure, there is provided a user equipment in a wireless communication system. The user equipment may include: a memory storing instructions; and a processor configured to execute the instructions to implement the aforementioned method for transmitting HARQ.

According to another aspect of an embodiment of the present disclosure, there is provided a base station in a wireless communication system. The base station may include: a memory storing instructions; and a processor configured to execute the instructions to implement the aforementioned method for receiving HARQ. Further, in the present application, a method for transmitting HARQ-ACK of PDSCH is described, so that on the premise of saving PDSCH and PDCCH in multicast and unicast technologies, HARQ-ACK feedback information of PDSCH can be accurately transmitted using as few PUCCH resources as possible.

The application provides a communication method, a communication device, electronic equipment and a computer readable storage medium. The technical scheme is as follows:

in a first aspect, the present application provides a method performed by a User Equipment (UE) in a communication system, where the method includes:

acquiring first information for activating detection of a first type Physical Downlink Control Channel (PDCCH);

detecting a first type PDCCH, and receiving a first type Physical Downlink Shared Channel (PDSCH) according to the first type PDCCH; and/or

Acquiring second information for stopping the detection of the first type PDCCH;

the detection of the first type PDCCH is stopped.

According to an exemplary embodiment, the first information comprises at least one of:

an activation indication;

detecting configuration information of a first type PDCCH;

configuration information for a first type PDSCH is received.

The first information includes at least one of:

an activation indication;

detecting configuration information of a first type PDCCH;

configuration information for a first type PDSCH is received.

The detecting the first type PDCCH comprises at least one of the following steps:

when the activation indication is a first preset value, detecting a first type PDCCH;

and when the activation indication is a second preset value, determining a corresponding information block in the first information, and determining whether to detect the first type PDCCH according to the activation indication in the information block.

The detecting the first type PDCCH comprises:

when the configuration for detecting the first type PDCCH is at least two sets, the configuration for detecting the first type PDCCH is determined according to the configuration information for detecting the first type PDCCH, and the first type PDCCH is detected according to the determined configuration for detecting the first type PDCCH.

The bit number of the configuration information for detecting the first type PDCCH is determined according to the configuration number for detecting the first type PDCCH.

When the first information is a high-level signaling, the detecting the first type PDCCH includes:

and when the configuration of the first type PDCCH is detected to be at least two sets, detecting the first type PDCCH according to the configuration of the first type PDCCH, which is indicated by the high-level signaling.

Detecting configuration information of the first type PDCCH and receiving configuration information of the first type PDSCH includes at least one of:

detecting a first type PDCCH and a serving cell receiving the first type PDSCH;

detecting a first type PDCCH and receiving a downlink bandwidth part BWP of the first type PDSCH;

detecting a frequency domain position of a first type PDCCH and a resource for receiving the first type PDSCH in a downlink BWP;

detecting control resource set configuration information of a first type PDCCH;

detecting search space configuration information of a first type PDCCH;

configuration information of a first type PDSCH is received.

if the serving cell detecting the first type PDCCH and receiving the first type PDSCH is an active serving cell and the active bwpa in the active serving cell is BWP detecting the first type PDCCH and receiving the first type PDSCH, detecting the first type PDCCH in the first PDCCH search space in the active bwpa;

if the serving cell for detecting the first-type PDCCH and receiving the first-type PDSCH is the active serving cell, but the active BWP A in the active serving cell is not the BWP for detecting the first-type PDCCH and receiving the first-type PDSCH, switching from the current active BWP A to the BWP B for detecting the first-type PDCCH and receiving the first-type PDSCH, and detecting the first-type PDCCH in the active BWP B;

and if the serving cell for detecting the first type PDCCH and receiving the first type PDSCH is an inactive serving cell, activating the serving cell, and activating to detect the first type PDCCH and receiving the BWP B of the first type PDSCH, and detecting the first type PDCCH in the activated BWP B.

When detecting a first type PDCCH in active BWP B, the method further comprises at least one of:

if the detection of the second type PDCCH and the reception of the second type PDSCH are configured in the BWP B, detecting the second type PDCCH in the activated BWP B;

if the active BWP a in the active serving cell and the BWP B detecting the first type PDCCH and receiving the first type PDSCH are a BWP pair and the active BWP B is included in the active BWP a, the second type PDCCH is detected in the second PDCCH search space in the active BWP a.

The second information comprises a stop indication, the stop detection of the first type PDCCH comprises at least one of:

when the stop instruction is a third preset value, stopping detecting the first type PDCCH;

and when the stop instruction is a fourth preset value, determining a corresponding information block in the second information, and determining whether to stop detecting the first type PDCCH or not according to the stop instruction in the information block.

After the stopping of detecting the first type PDCCH, at least one of the following is included:

if the second type PDCCH needs to be detected, detecting the second type PDCCH in a second PDCCH search space which currently activates BWP;

and if the second type PDCCH does not need to be detected, switching the BWP in the serving cell for detecting the first type PDCCH and receiving the first type PDSCH to a default BWP, or changing the serving cell for detecting the first type PDCCH and receiving the first type PDSCH to an inactive serving cell.

The detecting the first type PDCCH comprises:

determining a second time slot for detecting the first type PDCCH according to the first timing relation and the first time slot for receiving the first information;

detecting a first type PDCCH in the second time slot;

the stopping detecting the first type PDCCH comprises:

determining a fourth time slot for stopping detecting the first type PDCCH according to the second timing relation and the third time slot for receiving the second information;

stopping detecting the first type PDCCH in the fourth time slot.

The first timing relationship is determined according to whether a serving cell of the first type PDCCH is detected to be in an activated state and/or whether a BWP in which the first type PDCCH is located is detected to be an activated BWP;

the second timing relationship is determined based on the information type of the second information.

When the first information or the second information corresponds to at least two terminals, the method further includes:

feeding back HARQ-ACK of the first information or the second information when detecting the state change of the first type PDCCH;

and when the state of the first type PDCCH is detected to be unchanged, the HARQ-ACK of the first information or the second information is not fed back.

When there are at least 2 BWPs containing the first type search space and the frequency domain range of the first BWP currently located is larger than the frequency domain ranges of the other BWPs, the method further includes at least one of:

if a first timer for receiving the first-type PDSCH counting is not expired and a second timer for receiving the second-type PDSCH counting is expired, switching from the first BWP to other BWPs, and detecting a first-type PDCCH at the switched BWP;

if the first timer and the second timer both expire, switching to the default BWP or the initial BWP;

and if the first timer is expired and the second timer is not expired, stopping detecting the first type PDCCH or stopping detecting the first type PDCCH in the first type search space.

When switching BWP, at least one of the following is also included:

when the BWP before switching contains a first-type search space for detecting a first-type PDCCH and the state of the first-type PDCCH is detected to be an activated state, if the BWP after switching contains the first-type search space, the first-type PDCCH is activated and detected in the BWP after switching, and if the BWP after switching does not contain the first-type search space, the first-type PDCCH is not detected in the BWP after switching;

when the BWP before handover and the BWP specific to the first-type PDCCH are paired and both are in an active state, if the BWP after handover and the BWP specific to the first-type PDCCH are paired, the BWP specific to the first-type PDCCH paired with the BWP after handover is in an active state, and if the BWP after handover is not paired with the BWP specific to the first-type PDCCH, the first-type PDCCH is not detected after BWP handover.

When the first type PDCCH is not detected within the handed over BWP, the method further comprises at least one of:

detecting that the state of the first type PDCCH is an activated state, and detecting the first type PDCCH in a new BWP if switching to the new BWP containing the first type search space;

detecting that the state of the first type PDCCH is a stop state, and if switching to a new BWP containing a first type search space is performed, not detecting the first type PDCCH in the new BWP when no new activation instruction exists;

when the first type PDCCH is not detected after BWP handover, at least one of the following is included:

detecting that the state of the first type PDCCH is an activated state, and detecting the first type PDCCH in a fourth BWP if switching to a third BWP in which the second type PDCCH is detected and the third BWP and the fourth BWP in which the first type PDCCH is detected are a pair;

and if the state of the first type PDCCH is detected to be a stop state, and the state is switched to a third BWP in which the second type PDCCH is detected, and the third BWP is in a pair with a fourth BWP in which the first type PDCCH is detected, the first type PDCCH is not detected in the fourth BWP when no new activation indication exists.

The first type PDCCH is a multicast PDCCH, and the second type PDCCH is a unicast PDCCH.

In a second aspect, the present application provides a communication device comprising:

a first obtaining module, configured to obtain first information used for activating detection of a first type PDCCH;

the detection and receiving module is used for detecting the first type PDCCH and receiving the first type PDSCH according to the first type PDCCH; and/or

A second obtaining module, configured to obtain second information used for stopping the detection of the first type PDCCH;

a stopping module for stopping detecting the first type PDCCH.

In a third aspect, the present application provides an electronic device comprising: a processor and a memory storing at least one instruction, at least one program, set of codes, or set of instructions, which is loaded and executed by the processor to implement the method as set forth in the first aspect of the application.

In a fourth aspect, the present application provides a computer readable storage medium for storing a computer instruction, program, code set or instruction set which, when run on a computer, causes the computer to perform a method as set forth in the first aspect of the present application.

The communication method, the communication device, the electronic equipment and the computer-readable storage medium can effectively start and/or end the reception of the PDSCH.

The above-described and other features, aspects, and advantages of various embodiments of the present disclosure will become better understood with reference to the following description and appended claims. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate exemplary embodiments of the disclosure and together with the description, serve to explain the relevant principles. The details of one or more embodiments of the subject matter are set forth in the accompanying drawings and the description below. Other potential features, aspects, and advantages of the present subject matter will become apparent from the description, the drawings, and the claims.

Drawings

A detailed description and discussion of one or more embodiments of the subject matter hereof is set forth to those skilled in the art in the following description, which makes reference to the accompanying drawings, in which:

the present invention will be more readily understood from the following detailed description taken in conjunction with the accompanying drawings, wherein like reference numerals designate like structural elements, and in which:

fig. 1 illustrates an example wireless network in accordance with various embodiments of the present disclosure;

fig. 2a and 2b illustrate example wireless transmit and receive paths according to the present disclosure;

fig. 3a illustrates an example UE according to the present disclosure;

fig. 3b illustrates an example gNB according to the present disclosure;

FIG. 4 shows a flow diagram of an example method according to an embodiment of the present disclosure;

fig. 5 shows a diagram of a specific example for transmitting hybrid automatic repeat request acknowledgement (HARQ-ACK) information according to an embodiment of the present disclosure;

fig. 6 shows a diagram of a specific example for transmitting HARQ-ACK information according to an embodiment of the present disclosure;

fig. 7 shows a diagram of a specific example for transmitting HARQ-ACK information according to an embodiment of the present disclosure;

fig. 8 shows a diagram of a specific example for transmitting HARQ-ACK information according to an embodiment of the present disclosure;

fig. 9 shows a block diagram of an example UE in accordance with an embodiment of the present disclosure;

fig. 10 shows a block diagram of an example base station in accordance with an embodiment of the disclosure;

fig. 11 is a flowchart illustrating a communication method according to an embodiment of the present application;

fig. 12 is a flowchart illustrating another communication method according to an embodiment of the present application;

fig. 13 is a schematic flowchart of detecting a first type PDCCH and receiving a first type PDSCH according to an embodiment of the present application;

fig. 14 is a schematic diagram of a situation of detecting a first type PDCCH and receiving a first type PDSCH according to an embodiment of the present application;

fig. 15 is a schematic diagram of another situation of detecting a first type PDCCH and receiving a first type PDSCH according to an embodiment of the present application;

fig. 16 is a schematic diagram of another situation of detecting a first type PDCCH and receiving a first type PDSCH according to an embodiment of the present application;

fig. 17 is a schematic diagram of detecting a first type PDCCH and receiving a first type PDSCH according to a timing expiration stop provided in an embodiment of the present application;

fig. 18 is a schematic diagram after stopping detecting the first type PDCCH and receiving the first type PDSCH according to the embodiment of the present application;

fig. 19 is a schematic diagram of a handover BWP according to an embodiment of the present application;

fig. 20 is a schematic structural diagram of a communication device according to an embodiment of the present application; and

fig. 21 is a schematic structural diagram of another communication device according to an embodiment of the present application.

The same or similar reference numbers and designations in the various drawings indicate the same or similar elements.

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 that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below by referring to the accompanying drawings and examples.

Fig. 1 illustrates an example wireless network 100 in accordance with various embodiments of the present disclosure. The embodiment of the wireless network 100 shown in fig. 1 is for illustration only. Other embodiments of wireless network 100 can be used without departing from the scope of this disclosure.

Wireless network 100 includes a gandeb (gNB)101, a gNB102, and a gNB 103. gNB 101 communicates with gNB102 and gNB 103. The gNB 101 also communicates with at least one Internet Protocol (IP) network 130, such as the internet, a proprietary IP network, or other data network.

Depending on the network type, other well-known terms can be used instead of "gnnodeb" or "gNB", such as "base station" or "access point". For convenience, the terms "gNodeB" and "gNB" are used in this patent document to refer to network infrastructure components that provide wireless access for remote terminals. Also, other well-known terms, such as "mobile station", "subscriber station", "remote terminal", "wireless terminal", or "user equipment", can be used instead of "user equipment" or "UE", depending on the network type. For convenience, the terms "user equipment" and "UE" are used in this patent document to refer to a remote wireless device that wirelessly accesses the gNB, whether the UE is a mobile device (such as a mobile phone or smartphone) or what is commonly considered a stationary device (such as a desktop computer or vending machine).

gNB102 provides wireless broadband access to network 130 for a first plurality of User Equipments (UEs) within coverage area 120 of gNB 102. The first plurality of UEs includes: a UE 111, which may be located in a Small Enterprise (SB); a UE 112, which may be located in an enterprise (E); UE 113, which may be located in a WiFi Hotspot (HS); a UE 114, which may be located in a first residence (R); a UE 115, which may be located in a second residence (R); the UE 116, may be a mobile device (M) such as a cellular phone, wireless laptop, wireless PDA, etc. gNB 103 provides wireless broadband access to network 130 for a second plurality of UEs within coverage area 125 of gNB 103. The second plurality of UEs includes UE 115 and UE 116. In some embodiments, one or more of the gnbs 101-103 are capable of communicating with each other and with the UEs 111-116 using 5G, Long Term Evolution (LTE), LTE-A, WiMAX, or other advanced wireless communication technologies.

The dashed lines illustrate the approximate extent of

coverage areas

120 and 125, which are shown as approximately circular for purposes of illustration and explanation only. It should be clearly understood that coverage areas associated with the gNB, such as

coverage areas

120 and 125, can have other shapes, including irregular shapes, depending on the configuration of the gNB and variations in the radio environment associated with natural and artificial obstructions.

As described in more detail below, one or more of gNB 101, gNB102, and gNB 103 include a 2D antenna array as described in embodiments of the present disclosure. In some embodiments, one or more of gNB 101, gNB102, and gNB 103 support codebook design and structure for systems with 2D antenna arrays.

Although fig. 1 shows one example of a wireless network 100, various changes can be made to fig. 1. For example, wireless network 100 can include any number of gnbs and any number of UEs in any suitable arrangement. Also, the gNB 101 can communicate directly with any number of UEs and provide those UEs with wireless broadband access to the network 130. Similarly, each gNB 102-103 is capable of communicating directly with network 130 and providing UEs with direct wireless broadband access to network 130. Further, the

gnbs

101, 102, and/or 103 can provide access to other or additional external networks, such as external telephone networks or other types of data networks.

Fig. 2a and 2b illustrate example wireless transmit and receive paths according to the present disclosure. In the following description, transmit path 200 can be described as being implemented in a gNB (such as gNB 102), while receive path 250 can be described as being implemented in a UE (such as UE 116). However, it should be understood that the receive path 250 can be implemented in the gNB and the transmit path 200 can be implemented in the UE. In some embodiments, receive path 250 is configured to support codebook design and structure for systems with 2D antenna arrays as described in embodiments of the present disclosure.

The transmit path 200 includes a channel coding and modulation block 205, a serial-to-parallel (S-to-P) block 210, an N-point Inverse Fast Fourier Transform (IFFT) block 215, a parallel-to-serial (P-to-S) block 220, an add cyclic prefix block 225, and an up-converter (UC) 230. Receive path 250 includes a down-converter (DC)255, a remove cyclic prefix block 260, a serial-to-parallel (S-to-P) block 265, an N-point Fast Fourier Transform (FFT) block 270, a parallel-to-serial (P-to-S) block 275, and a channel decode and demodulation block 280.

In transmit path 200, a channel coding and modulation block 205 receives a set of information bits, applies coding, such as Low Density Parity Check (LDPC) coding, and modulates the input bits, such as with Quadrature Phase Shift Keying (QPSK) or Quadrature Amplitude Modulation (QAM), to generate a sequence of frequency domain modulation symbols. A serial-to-parallel (S-to-P) block 210 converts (such as demultiplexes) the serial modulation symbols into parallel data in order to generate N parallel symbol streams, where N is the number of IFFT/FFT points used in the gNB102 and the UE 116. N-point IFFT block 215 performs IFFT operations on the N parallel symbol streams to generate a time-domain output signal. Parallel-to-serial block 220 converts (such as multiplexes) the parallel time-domain output symbols from N-point IFFT block 215 to generate a serial time-domain signal. Add cyclic prefix block 225 inserts a cyclic prefix into the time domain signal. Upconverter 230 modulates (such as upconverts) the output of add cyclic prefix block 225 to an RF frequency for transmission over a wireless channel. The signal can also be filtered at baseband before being converted to RF frequency.

The RF signal transmitted from the gNB102 reaches the UE 116 after passing through the radio channel, and the reverse operation to that at the gNB102 is performed at the UE 116. Downconverter 255 downconverts the received signal to baseband frequency and remove cyclic prefix block 260 removes the cyclic prefix to generate a serial time-domain baseband signal. Serial-to-parallel block 265 converts the time-domain baseband signal to parallel time-domain signals. The N-point FFT block 270 performs an FFT algorithm to generate N parallel frequency domain signals. Parallel-to-serial block 275 converts the parallel frequency-domain signals to a sequence of modulated data symbols. Channel decode and demodulation block 280 demodulates and decodes the modulated symbols to recover the original input data stream.

Each of the gnbs 101-103 may implement a transmit path 200 similar to transmitting to the UE 111-116 in the downlink and may implement a receive path 250 similar to receiving from the UE 111-116 in the uplink. Similarly, each of UEs 111-116 may implement a transmit path 200 for transmitting in the uplink to gNB 101-103 and may implement a receive path 250 for receiving in the downlink from gNB 101-103.

Each of the components in fig. 2a and 2b can be implemented using hardware only, or using a combination of hardware and software/firmware. As a specific example, at least some of the components in fig. 2a and 2b may be implemented in software, while other components may be implemented in configurable hardware or a mixture of software and configurable hardware. For example, FFT block 270 and IFFT block 215 may be implemented as configurable software algorithms, where the value of the number of points N may be modified depending on the implementation.

Further, although described as using an FFT and IFFT, this is merely illustrative and should not be construed as limiting the scope of the disclosure. Other types of transforms can be used, such as Discrete Fourier Transform (DFT) and Inverse Discrete Fourier Transform (IDFT) functions. It should be understood that the value of the variable N may be any integer (such as 1, 2, 3, 4, etc.) for DFT and IDFT functions, and any integer that is a power of 2 (such as 1, 2, 4, 8, 16, etc.) for FFT and IFFT functions.

Although fig. 2a and 2b show examples of wireless transmission and reception paths, various changes may be made to fig. 2a and 2 b. For example, the various components in fig. 2a and 2b can be combined, further subdivided, or omitted, and additional components can be added according to particular needs. Also, fig. 2a and 2b are intended to illustrate examples of the types of transmit and receive paths that can be used in a wireless network. Any other suitable architecture can be used to support wireless communications in a wireless network.

Fig. 3a illustrates an example UE 116 according to the present disclosure. The embodiment of the UE 116 shown in fig. 3a is for illustration only, and the

UE

111 and 115 of fig. 1 can have the same or similar configuration. However, UEs have a wide variety of configurations, and fig. 3a does not limit the scope of the present disclosure to any particular implementation of a UE.

The UE 116 includes an antenna 305, a Radio Frequency (RF) transceiver 310, Transmit (TX) processing circuitry 315, a microphone 320, and Receive (RX) processing circuitry 325. The UE 116 also includes a speaker 330, a processor/controller 340, an input/output (I/O) interface 345, input device(s) 350, a display 355, and a memory 360. Memory 360 includes an Operating System (OS)361 and one or more applications 362.

RF transceiver 310 receives incoming RF signals from antenna 305 that are transmitted by the gNB of wireless network 100. The RF transceiver 310 down-converts an incoming RF signal to generate an Intermediate Frequency (IF) or baseband signal. The IF or baseband signal is sent to RX processing circuitry 325, where RX processing circuitry 325 generates a processed baseband signal by filtering, decoding, and/or digitizing the baseband or IF signal. RX processing circuit 325 sends the processed baseband signals to speaker 330 (such as for voice data) or to processor/controller 340 (such as for web browsing data) for further processing.

TX processing circuitry 315 receives analog or digital voice data from microphone 320 or other outgoing baseband data (such as network data, e-mail, or interactive video game data) from processor/controller 340. TX processing circuitry 315 encodes, multiplexes, and/or digitizes the outgoing baseband data to generate a processed baseband or IF signal. RF transceiver 310 receives the outgoing processed baseband or IF signals from TX processing circuitry 315 and upconverts the baseband or IF signals to RF signals, which are transmitted via antenna 305.

The processor/controller 340 can include one or more processors or other processing devices, and executes the OS 361 stored in the memory 360 in order to control overall operation of the UE 116. For example, processor/controller 340 may be capable of controlling the reception of forward channel signals and the transmission of reverse channel signals by RF transceiver 310, RX processing circuitry 325, and TX processing circuitry 315 in accordance with well-known principles. In some embodiments, processor/controller 340 includes at least one microprocessor or microcontroller.

The processor/controller 340 can also execute other processes and programs resident in the memory 360, such as operations for channel quality measurement and reporting for systems having 2D antenna arrays as described in embodiments of the present disclosure. Processor/controller 340 is capable of moving data into and out of memory 360 as needed to perform a process. In some embodiments, processor/controller 340 is configured to execute applications 362 based on OS 361 or in response to signals received from the gNB or the operator. The processor/controller 340 is also coupled to an I/O interface 345, where the I/O interface 345 provides the UE 116 with the ability to connect to other devices, such as laptop computers and handheld computers. I/O interface 345 is the communication path between these accessories and processor/controller 340.

The processor/controller 340 is also coupled to input device(s) 350 and a display 355. The operator of the UE 116 can input data into the UE 116 using the input device(s) 350. Display 355 may be a liquid crystal display or other display capable of presenting text and/or at least limited graphics (such as from a website). A memory 360 is coupled to the processor/controller 340. A portion of memory 360 can include Random Access Memory (RAM) while another portion of memory 360 can include flash memory or other Read Only Memory (ROM).

Although fig. 3a shows one example of the UE 116, various changes can be made to fig. 3 a. For example, the various components in FIG. 3a can be combined, further subdivided, or omitted, and additional components can be added according to particular needs. As a particular example, the processor/controller 340 can be divided into multiple processors, such as one or more Central Processing Units (CPUs) and one or more Graphics Processing Units (GPUs). Also, while fig. 3a shows the UE 116 configured as a mobile phone or smart phone, the UE can be configured to operate as other types of mobile or fixed devices.

Fig. 3b illustrates an example gNB102 according to this disclosure. The embodiment of the gNB102 shown in fig. 3b is for illustration only, and the other gnbs of fig. 1 can have the same or similar configuration. However, the gNB has a wide variety of configurations, and fig. 3b does not limit the scope of the present disclosure to any particular implementation of the gNB. Note that gNB 101 and gNB 103 can include the same or similar structure as gNB 102.

As shown in fig. 3b, the gNB102 includes a plurality of antennas 370a-370n, a plurality of RF transceivers 372a-372n, Transmit (TX) processing circuitry 374, and Receive (RX) processing circuitry 376. In some embodiments, one or more of the plurality of antennas 370a-370n comprises a 2D antenna array. The gNB102 also includes a controller/processor 378, a memory 380, and a backhaul or network interface 382.

The RF transceivers 372a-372n receive incoming RF signals, such as signals transmitted by UEs or other gnbs, from the antennas 370a-370 n. RF transceivers 372a-372n down-convert the incoming RF signals to generate IF or baseband signals. The IF or baseband signal is sent to RX processing circuitry 376, where RX processing circuitry 376 generates a processed baseband signal by filtering, decoding, and/or digitizing the baseband or IF signal. The RX processing circuit 376 sends the processed baseband signals to the controller/processor 378 for further processing.

TX processing circuitry 374 receives analog or digital data (such as voice data, network data, e-mail, or interactive video game data) from controller/processor 378. TX processing circuitry 374 encodes, multiplexes, and/or digitizes the outgoing baseband data to generate a processed baseband or IF signal. RF transceivers 372a-372n receive outgoing processed baseband or IF signals from TX processing circuitry 374 and upconvert the baseband or IF signals into RF signals for transmission via antennas 370a-370 n.

Controller/processor 378 can include one or more processors or other processing devices that control the overall operation of gNB 102. For example, the controller/processor 378 may be capable of controlling the reception of forward channel signals and the transmission of reverse channel signals by the RF transceivers 372a-372n, the RX processing circuitry 376, and the TX processing circuitry 374 in accordance with well-known principles. The controller/processor 378 can also support additional functions, such as higher-level wireless communication functions. For example, the controller/processor 378 can perform a Blind Interference Sensing (BIS) process, such as by performing a BIS algorithm, and decode the received signal with the interference signal subtracted. Controller/processor 378 may support any of a wide variety of other functions in the gNB 102. In some embodiments, controller/processor 378 includes at least one microprocessor or microcontroller.

Controller/processor 378 is also capable of executing programs and other processes resident in memory 380, such as a base OS. The controller/processor 378 can also support channel quality measurement and reporting for systems with 2D antenna arrays as described in embodiments of the present disclosure. In some embodiments, controller/processor 378 supports communication between entities such as a web RTC. Controller/processor 378 can move data into and out of memory 380 as needed to perform a process.

Controller/processor 378 is also coupled to a backhaul or network interface 382. Backhaul or network interface 382 allows gNB102 to communicate with other devices or systems over a backhaul connection or over a network. Backhaul or network interface 382 can support communication via any suitable wired or wireless connection(s). For example, when the gNB102 is implemented as part of a cellular communication system (such as one supporting 5G or new radio access technologies or NR, LTE or LTE-a), the backhaul or network interface 382 can allow the gNB102 to communicate with other gnbs over wired or wireless backhaul connections. When gNB102 is implemented as an access point, backhaul or network interface 382 can allow gNB102 to communicate with a larger network (such as the internet) via a wired or wireless local area network or via a wired or wireless connection. Backhaul or network interface 382 includes any suitable structure that supports communication over a wired or wireless connection, such as an ethernet or RF transceiver.

A memory 380 is coupled to the controller/processor 378. A portion of memory 380 can include RAM and another portion of memory 380 can include flash memory or other ROM. In some embodiments, a plurality of instructions, such as a BIS algorithm, are stored in memory. The plurality of instructions are configured to cause the controller/processor 378 to perform a BIS process and decode the received signal after subtracting at least one interfering signal determined by a BIS algorithm.

As described in more detail below, the transmit and receive paths of gNB102 (implemented using RF transceivers 372a-372n, TX processing circuitry 374, and/or RX processing circuitry 376) support aggregated communication with FDD and TDD cells.

Although fig. 3b shows one example of a gNB102, various changes may be made to fig. 3 b. For example, the gNB102 can include any number of each of the components shown in fig. 3 a. As a particular example, the access point can include a number of backhauls or network interfaces 382 and the controller/processor 378 can support routing functions to route data between different network addresses. As another particular example, although shown as including a single instance of TX processing circuitry 374 and a single instance of RX processing circuitry 376, gNB102 can include multiple instances of each (such as one for each RF transceiver).

Exemplary embodiments of the present disclosure are further described below in conjunction with the appended drawings.

The text and drawings are provided as examples only to assist the reader in understanding the disclosure. They are not intended, nor should they be construed, as limiting the scope of the disclosure in any way. While certain embodiments and examples have been provided, it will be apparent to those skilled in the art, based on the disclosure herein, that changes can be made in the embodiments and examples shown without departing from the scope of the disclosure.

The transmissions from a base station to a User Equipment (UE), called downlink, are defined by different physical channels: a Physical Downlink Shared Channel (PDSCH) is used for transmitting service data and may also transmit signaling; the PDCCH may carry resource allocation information for paging and user data, and HARQ information related to the user data. The transmission by the UE to the base station is called uplink. HARQ-ACK Information of the PDSCH may be transmitted on a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH), and the PDSCH is scheduled by Downlink Control Information (DCI) transmitted on the Physical Downlink Control Channel (PDCCH).

For PDSCH transmission, Unicast (Unicast), Multicast (Groupcast or Multicast), or Broadcast (Broadcast) transmission mechanisms may be used. The unicast PDSCH is a PDSCH received by one UE, and preferably, scrambling of the unicast PDSCH is based on a Radio Network Temporary Identifier (RNTI) unique to the UE, e.g., a C-RNTI, and multicast/broadcast is a PDSCH received by more than one UE at the same time. Compared with the unicast PDSCH, the multicast/broadcast can effectively improve the communication efficiency. But the current transmission mode still needs to be perfected.

There is a need to provide a technique for transmitting a multicast (groupcast or multicast)/HARQ-ACK for a broadcast PDSCH.

Hereinafter, the HARQ-ACK information of the PDSCH will be described by taking the example of transmitting the HARQ-ACK information on the PUCCH as an example, but it should be understood by those skilled in the art that the HARQ-ACK information of the PDSCH may also be transmitted on the PUSCH or may be transmitted on a Physical Random Access Channel (PRACH), and the scheme described hereinafter by taking the PUCCH as an example is also applicable to the PUSCH and the PRACH.

Fig. 4 shows a flow diagram of an example method 400 in accordance with an embodiment of the present disclosure. The example method 400 of fig. 4 may be used to send hybrid automatic repeat request acknowledgement, HARQ-ACK, information. The method 400 may be implemented at the UE side.

As shown in fig. 4, in step S410 of the method 400, control information is received from a base station. For example, the control information may be Downlink Control Information (DCI).

In step S420, a plurality of downlink data are received based on the control information. For example, the downlink data may be PDSCH. The control information may include a field related to transmission of downlink data, and the UE may receive a plurality of downlink data based on information indicated by the related field in the control information.

In step S430, resources for transmitting HARQ-ACK are determined for the plurality of downlink data based on the control information.

According to an embodiment of the present disclosure, determining resources for transmitting HARQ-ACK information includes: determining a first resource or resource pair for transmitting HARQ-ACK information for each of a plurality of downlink data; or one second resource or pair of resources for transmitting HARQ-ACK information is determined for a plurality of downlink data.

According to an embodiment of the present disclosure, the PUCCH Resource for transmitting HARQ-ACK information may be indicated by a PUCCH Resource Indicator (PRI) field in DCI.

In step S440, HARQ-ACK information is transmitted to the base station on the determined resources.

The PDSCH as the downlink data may be a multicast PDSCH or a broadcast PDSCH, that is, the same PDSCH may be received by more than one UE, as shown in fig. 5, two UE-1 and UE-2 receive the same PDSCH, respectively determine HARQ-ACK information according to whether the decoded PDSCH is correct or not, and respectively feed back the HARQ-ACK information to the base station. However, the PDSCH is not limited to the multicast PDSCH and the broadcast PDSCH.

According to exemplary embodiments of the present disclosure, if the UE correctly decodes the PDSCH, the UE does not feed back HARQ-ACK information, and if the UE receives the PDCCH but does not correctly decode the PDSCH, the UE feeds back NACK on the PUCCH resource.

According to an exemplary embodiment of the present disclosure, if the UE correctly decodes the PDSCH, the UE feeds back ACK on the PUCCH resource, and if the UE receives the PDCCH but does not correctly decode the PDSCH, the UE feeds back NACK on the PUCCH resource.

What has been said above is a method for a UE to process when HARQ-ACK information of one or more PDSCHs needs to be fed back in one slot.

According to an embodiment of the present disclosure, the user equipment may transmit using the same resource or resource pair as at least one other user equipment for HARQ-ACK information of the same downlink data.

Fig. 6 illustrates a diagram of a specific example for transmitting hybrid automatic repeat request acknowledgement (HARQ-ACK) information according to an embodiment of the present disclosure.

When the UE is to feed back HARQ-ACK information for more than one PDSCH in one slot, an exemplary embodiment of its processing method is explained below with reference to fig. 6.

Example 1:

for the HARQ-ACK information of each PDSCH in the multiple PDSCHs received by the UE, the UE uses independent PUCCH resources to transmit respectively, where the independent PUCCH resources may be time division resources, code division resources, frequency division resources, or time division resources, code division resources, or frequency division resources, that is, the independent PUCCH resources are orthogonal to each other. HARQ-ACK information for different PDSCHs received by the UE may be transmitted simultaneously on different PUCCH resources. For example, the UE receives 2 PDSCH in 2 slots, HARQ-ACK information of 2 PDSCH is transmitted on PUCCH of one slot n, HARQ-ACK information of PDSCH-1 is transmitted on PUCCH-1, and HARQ-ACK information of PDSCH-2 is transmitted on PUCCH-2, as shown in FIG. 7. PUCCH-1 is transmitted on OFDM symbol 1 and OFDM symbol 2 of slot n, PUCCH-2 is transmitted on OFDM symbol 4 and OFDM symbol 5 of slot n, PUCCH-1 and PUCCH-2 are not overlapped in time, or PUCCH-1 is transmitted on OFDM symbol 1 and OFDM symbol 2 of slot n, PUCCH-2 is transmitted on OFDM symbol 2 and OFDM symbol 3 of slot n, PUCCH-1 and PUCCH-2 are overlapped in time, PUCCH-1 and PUCCH-2 occupy different Physical Resource Blocks (PRBs) that PUCCH-1 and PUCCH-2 are not overlapped in frequency domain, or PUCCH-1 and PUCCH-2 are overlapped in frequency domain, but PUCCH-1 and PUCCH-2 use different Cyclic shifts (CS, Cyclic Shift), a plurality of PUCCH resources are used above, or different signal sequences of one PUCCH resource, in the following, the use of a plurality of PUCCH resources is taken as an example, and the present invention can also be applied to different signal sequences of one PUCCH resource.

For different UEs, for the transmission of the HARQ-ACK information of the same PDSCH, the HARQ-ACK information can be transmitted by using a shared PUCCH resource, that is, the same PUCCH resource is used for the transmission of the HARQ-ACK information of the same PDSCH, for example, UE-1 receives PDSCH-1, UE-1 transmits the HARQ-ACK information of PDSCH-1 on PUCCH-1, UE-2 receives PDSCH-1, and UE-2 transmits the HARQ-ACK information of PDSCH-1 on PUCCH-1.

According to an embodiment of the present disclosure, there is a method of PUCCH resource indication as follows.

When the UE does not feed back HARQ-ACK information if the UE correctly decodes the PDSCH, and feeds back NACK on PUCCH resources if the UE receives the PDCCH but does not correctly decode the PDSCH, one PUCCH resource is required for the feedback of each PDSCH. At this time, if the UE receives multiple PDSCHs and HARQ-ACK information of the multiple PDSCHs is transmitted on one PUCCH resource, and other UEs receive HARQ-ACK information of the same multiple PDSCHs and transmit on the same PUCCH resource, the HARQ-ACK information of the multiple PDSCHs of each UE is transmitted by using the existing HARQ-ACK information transmission method, and the base station cannot distinguish the HARQ-ACK information of each PDSCH. The HARQ-ACK information transmission method of the present disclosure may solve at least the above problems.

When the UE feeds back ACK on PUCCH-1 resources if the UE correctly decodes the PDSCH, and feeds back NACK on PUCCH-2 resources if the UE receives the PDCCH but does not correctly decode the PDSCH, the feedback of each PDSCH requires one PUCCH resource pair including 2 PUCCH resources.

Example 1-1:

the transmission Resource of the HARQ-ACK information of each PDSCH is indicated by PUCCH Resource Indicator (PRI) information in the DCI scheduling the PDSCH, and the UE receives the PRI in the DCI scheduling the PDSCH, thereby determining a PUCCH Resource or PUCCH Resource pair transmitting the HARQ-ACK information of the PDSCH.

The benefit of using this approach is that no additional signaling is required in the DCI.

Examples 1 to 2:

PUCCH Resource Indicator (PRI) Information in DCI for scheduling PDSCH indicates a set of PUCCH resources or a set of PUCCH resources to PUCCH resources for transmission of HARQ-ACK Information for the set PDSCH, a Downlink Assignment Information (DAI) field is added in the DCI for scheduling PDSCH for indicating the number of PDSCH scheduled so far, the UE determines a set of PUCCH resources for transmission of HARQ-ACK Information for the set PDSCH according to the PRI and DAI in the received DCI for scheduling the last PDSCH, the set of PUCCH resources for transmission of HARQ-ACK Information for the set PDSCH is indicated by the DAI in DCI for scheduling the last PDSCH, for example, when the DAI is equal to 3, the set of HARQ-ACK Information for transmission of the set PDSCH is 3, the PUCCH-ACK Information for transmission of the first PDSCH (i.e., PUCCH with DAI equal to 1) in the first PDSCH is transmitted in the first PDSCH resources, the HARQ-ACK Information for transmission of the second PDSCH in the set PDSCH is transmitted in the second PDSCH, HARQ-ACK information for a third PDSCH of the set of PDSCHs is transmitted on a third PUCCH resource as shown in fig. 8. Here, the first, second, and third PDSCH in a set of PDSCHs may be continuous or discontinuous over a time slot.

The benefits of using this approach include at least: when the middle PDSCH is dropped, the UE can still feed back the HARQ-ACK information of the dropped PDSCH, and the base station can retransmit the PDSCH.

The benefits of using this method also include: different UEs can use the shared PUCCH resource to transmit the HARQ-ACK information, and when the number of the UEs receiving the multicast PDSCH is more, the PUCCH resource for transmitting the HARQ-ACK information can be saved.

Example 2:

when the UE receives a plurality of PDSCHs, the UE selects one PUCCH resource in a set of PUCCH resources (or one signal sequence in a plurality of signal sequences in one PUCCH resource) according to the HARQ-ACK information of the plurality of PDSCHs, and the method described below is illustrated by taking the selection of one PUCCH resource in a set of PUCCH resources as an example, and the method can also be applied to the case of selecting one signal sequence in a plurality of signal sequences in one PUCCH resource) to transmit HARQ-ACK information of the plurality of PDSCHs, or, selects one PUCCH resource pair (one PUCCH resource pair includes 2 PUCCH resources) in a set of PUCCH resource pairs (or one PUCCH resource pair (one PUCCH resource pair includes 2 PUCCH resources) according to the HARQ-ACK information of the plurality of PDSCHs, and the method described below is illustrated by taking the selection of one PUCCH resource in a set of PUCCH resources as an example, these methods are also applicable to the case where one signal sequence is selected from among a plurality of signal sequences in one PUCCH resource) to transmit HARQ-ACK information of a plurality of PDSCHs,

for different UEs receiving the multicast PDSCH, the HARQ-ACK information may be transmitted using shared PUCCH resources.

By adopting the method, at least one UE can be prevented from simultaneously sending HARQ-ACK information on a plurality of PUCCH resources overlapped in time to cause large peak-to-average ratio and influence on the efficiency of the power amplifier.

Example 2-1:

according to the embodiment of the disclosure, the UE bundles HARQ-ACK information of a plurality of downlink data and transmits the bundled HARQ-ACK information on the determined one second resource or resource pair.

For example, when the UE receives multiple PDSCHs, the UE bundles HARQ-ACK information of the multiple PDSCHs and then transmits the HARQ-ACK information on one PUCCH resource, and if the bundled HARQ-ACK information is NACK, the HARQ-ACK information is transmitted on the PUCCH resource, and if the bundled HARQ-ACK information is ACK, the HARQ-ACK information is not transmitted. For example, the HARQ-ACK information of 4 PDSCHs of 4 slots is transmitted on the PUCCH of one slot, if the HARQ-ACKs of 4 PDSCHs of 4 slots are all ACKs, the bundled HARQ-ACK information is ACK, at this time, the HARQ-ACK information is not transmitted, if at least one of the HARQ-ACKs of 4 PDSCHs of 4 slots is NACK, the bundled HARQ-ACK information is NACK, at this time, the HARQ-ACK information is transmitted on the PUCCH-1 resource. It is described above that for one UE, for different UEs, the HARQ-ACK information may be transmitted using a shared PUCCH resource, that is, for different UEs, when the bundled HARQ-ACK information is the same, the feedback HARQ-ACK information is transmitted using the same PUCCH resource, for example, for UE-1, if the bundled HARQ-ACK information is NACK, the feedback HARQ-ACK information is transmitted on PUCCH-1 resource, and for UE-2, if the bundled HARQ-ACK information is NACK, the feedback HARQ-ACK information is also transmitted on PUCCH-1 resource.

Or, when the UE receives a plurality of PDSCHs, bundling HARQ-ACK information of the PDSCHs, and then transmitting the bundled HARQ-ACK information on one PUCCH resource, if the bundled HARQ-ACK information is NACK, transmitting the bundled HARQ-ACK information on the PUCCH-1 resource, and if the bundled HARQ-ACK information is ACK, transmitting the bundled HARQ-ACK information on the PUCCH-2 resource. For example, the HARQ-ACK information of 4 PDSCHs of 4 slots is transmitted on the PUCCH of one slot, if the HARQ-ACKs of 4 PDSCHs of 4 slots are all ACKs, the bundled HARQ-ACK information is ACK, and is transmitted on the PUCCH-2 resource, and if at least one of the HARQ-ACKs of 4 PDSCHs of 4 slots is NACK, the bundled HARQ-ACK information is NACK, and at this time, the HARQ-ACK information is transmitted on the PUCCH-1 resource. It is described above that for one UE, for different UEs, the HARQ-ACK information may be transmitted using a shared PUCCH resource, that is, for different UEs, when the bundled HARQ-ACK information is the same, the feedback HARQ-ACK information is transmitted using the same PUCCH resource, for example, for UE-1, if the bundled HARQ-ACK information is ACK, the feedback HARQ-ACK information is transmitted on PUCCH-2 resource, for UE-2, if the bundled HARQ-ACK information is ACK, the feedback HARQ-ACK information is also transmitted on PUCCH-2 resource, for UE-1, if the bundled HARQ-ACK information is NACK, the feedback HARQ-ACK information is transmitted on PUCCH-1 resource, and for UE-2, if the bundled HARQ-ACK information is NACK, the feedback HARQ-ACK information is also transmitted on PUCCH-1 resource.

The benefits of using this approach include at least: and PUCCH resources are saved.

Example 2-2:

according to an embodiment of the present disclosure, one second resource or resource pair for transmitting HARQ-ACK information is determined based on a predetermined rule.

For example, when the UE receives multiple PDSCHs, the HARQ-ACK information of each PDSCH corresponds to one PUCCH resource, and if only the HARQ-ACK information of one PDSCH among the multiple PDSCHs is NACK, the UE transmits the HARQ-ACK information of the PDSCH on the PUCCH resource corresponding to the HARQ-ACK information of the PDSCH. And if the HARQ-ACK information of more than one PDSCH in the PDSCHs is NACK, the UE determines the HARQ-ACK information of one PDSCH as the HARQ-ACK information to be transmitted on the PUCCH resource corresponding to the NACK in the PDSCHs of which the HARQ-ACK information is NACK according to the determined rule. The determined rule may be that the first time (or the last time) of the NACKs that the HARQ-ACK information of the PDSCHs received by the UE is determined to be the PDSCH on which the UE wants to transmit the HARQ-ACK information, and the HARQ-ACK information of the PDSCHs on which the HARQ-ACK information of the other PDSCHs is NACK is not transmitted. For example, the UE receives PDSCH-1 in a time slot n, the UE receives PDSCH-2 in a time slot n +2, and according to the timing relationship, the UE transmits HARQ-ACK information of the PDSCH-1 and the PDSCH-2 in the time slot n +4, if the HARQ-ACK information of the PDSCH-1 is NACK, the HARQ-ACK information of the PDSCH-2 is ACK, and the UE transmits the HARQ-ACK information of the PDSCH-1 in the PUCCH-1; if the HARQ-ACK information of the PDSCH-1 is ACK and the HARQ-ACK information of the PDSCH-2 is NACK, the UE transmits the HARQ-ACK information of the PDSCH-2 in the PUCCH-2; if the HARQ-ACK information of the PDSCH-1 is NACK, the HARQ-ACK information of the PDSCH-2 is NACK, the PDSCH-1 is the first PDSCH in the time that the HARQ-ACK information of the 2 PDSCHs received by the UE is NACK, and the UE transmits the HARQ-ACK information of the PDSCH-1 on the PUCCH-1.

The benefits of using this approach include at least: the method can save PUCCH resources, and can avoid the condition that one UE simultaneously transmits HARQ-ACK information on a plurality of PUCCH resources with overlapped time to cause large peak-to-average ratio.

Examples 2 to 3:

according to an embodiment of the present disclosure, one second resource or resource pair for transmitting HARQ-ACK information is selected from the set of resources for transmitting HARQ-ACK information.

For example, when the UE receives at least one PDSCH, the UE determines a PUCCH resource from a PUCCH resource set according to HARQ-ACK information of the received at least one PDSCH, and transmits HARQ-ACK information of the at least one PDSCH on the PUCCH resource.

The specific implementation method can be as follows:

a PUCCH resource set (which may also be a signal sequence set) is first determined.

This resource set determination may be made in the following two ways. One is a method of semi-statically determining the PUCCH resource set, i.e. determining the PUCCH resource set according to the number of PDSCHs that may transmit HARQ-ACK information in the uplink slot, e.g. a PDSCH that may transmit HARQ-ACK in slot n may be in slots n-1, n-2, n-3 and n-4, and a PUCCH resource set is determined according to HARQ-ACK information that may send 4 PDSCHs in slot n. The other method is to dynamically determine the PUCCH resource set, that is, to determine the PUCCH resource set according to the number of PDSCHs that the UE knows to receive the PDSCH and transmit HARQ-ACK information in the uplink time slot, for example, the UE receives the PDSCH in time slots n-2 and n-3, and determines the PUCCH resource set according to HARQ-ACK information that 2 PDSCHs may be transmitted and received in time slot n.

Then, one PUCCH resource is determined from the determined PUCCH resource set according to the HARQ-ACK information value of the PDSCH received by the UE.

And transmitting the HARQ-ACK information of the PDSCH on the determined PUCCH resource.

This is explained in more detail below by way of illustrative examples.

Example 3:

downlink Assignment Indication (DAI) is included in Downlink Control Information (DCI) of the scheduled PDSCH, the UE knows the number L of PDSCHs which need to feed back HARQ-ACK in the same uplink time slot according to the DAI in the received DCI, and then determines to feed back PUCCH resources according to the HARQ-ACK Information of the PDSCHs.

For example, when L is equal to 1, one method is that the UE feeds back the HARQ-ACK information of the PDSCH on the PUCCH resource if the HARQ-ACK information of the PDSCH is NACK, and does not feed back the HARQ-ACK information of the PDSCH if the HARQ-ACK information of the PDSCH is ACK.

For example, when L is equal to 2, one method is to determine HARQ-ACK information transmission for PDSCH according to the method in table 1.

Table 1: correspondence between HARQ-ACK information of PDSCH and PUCCH resource for feeding back HARQ-ACK

For example, when L is equal to 3, one method is to determine HARQ-ACK information transmission of PDSCH according to the method in table 2.

Table 2: correspondence between HARQ-ACK information of PDSCH and PUCCH resource for feeding back HARQ-ACK

For example, when L is equal to 4, one method is to determine HARQ-ACK information transmission of PDSCH according to the method in table 3.

Table 3: correspondence between HARQ-ACK information of PDSCH and PUCCH resource for feeding back HARQ-ACK

When L is greater than 4, HARQ-ACK information may be transmitted using a similar method.

Example 4:

downlink Assignment Indication (DAI) is included in Downlink Control Information (DCI) of the scheduled PDSCH, the UE knows the number L of PDSCHs which need to feed back HARQ-ACK in the same uplink time slot according to the DAI in the received DCI, and then determines to feed back PUCCH resources according to the HARQ-ACK Information of the PDSCH,

for example, when L is equal to 1, one method is that the UE feeds back the HARQ-ACK information of the PDSCH on the PUCCH resource if the HARQ-ACK information of the PDSCH is NACK, the UE does not feed back the HARQ-ACK information of the PDSCH if the HARQ-ACK information of the PDSCH is ACK, another method is that the UE feeds back the HARQ-ACK information of the PDSCH on the PUCCH-1 resource if the HARQ-ACK information of the PDSCH is NACK, the UE feeds back the HARQ-ACK information of the PDSCH on the PUCCH-2 resource if the HARQ-ACK information of the PDSCH is ACK,

for example, when L is equal to 2, one method is to determine HARQ-ACK information transmission of PDSCH according to the method in table 4, and when HARQ-ACK information of all PDSCH is ACK, the UE does not feed back HARQ-ACK information. The other method is to determine the transmission of the HARQ-ACK information of the PDSCH according to the method in table 5, and when all the HARQ-ACK information of the PDSCH is ACK, the UE feeds back the HARQ-ACK information.

Table 4: correspondence between HARQ-ACK information of PDSCH and PUCCH resource for feeding back HARQ-ACK

Table 5: correspondence between HARQ-ACK information of PDSCH and PUCCH resource feeding back HARQ-ACK

E.g., L is equal to 3, one method is to determine HARQ-ACK information transmission for PDSCH according to the method in table 6, when L is equal to 3 and the HARQ-ACK information of the third PDSCH is ACK, the HARQ-ACK information of the first PDSCH, the correspondence relationship of the HARQ-ACK information of the second PDSCH to the PUCCH resource for feeding back the HARQ-ACK is the same as that when L is equal to 2, that is, the HARQ-ACK information of the first PDSCH in the first 3 rows of table 6, the correspondence relationship of the HARQ-ACK information of the second PDSCH to the PUCCH resource for feeding back the HARQ-ACK is the same as that of the first PDSCH in the first 3 rows of table 4, and the correspondence relationship of the HARQ-ACK information of the second PDSCH to the PUCCH resource for feeding back the HARQ-ACK is the same, which is advantageous if the base station transmits the third PDSCH, and when the UE does not receive the third PDSCH, the inconsistency of the comprehension of the base station and the UE on the transmission of the HARQ-ACK information is avoided. And when the HARQ-ACK information of all PDSCHs is ACK, the UE does not feed back the HARQ-ACK information. The other method is to determine the transmission of the HARQ-ACK information of the PDSCH according to the method in table 7, and when all the HARQ-ACK information of the PDSCH is ACK, the UE feeds back the HARQ-ACK information.

Table 6: correspondence between HARQ-ACK information of PDSCH and PUCCH resource for feeding back HARQ-ACK

Table 7: correspondence between HARQ-ACK information of PDSCH and PUCCH resource for feeding back HARQ-ACK

For example, when L is equal to 4, a method determines HARQ-ACK information transmission of PDSCH according to the method in table 8, when L is equal to 4 and HARQ-ACK information of a fourth PDSCH is ACK, HARQ-ACK information of the first PDSCH, HARQ-ACK information of the second PDSCH, correspondence of HARQ-ACK information of the third PDSCH to PUCCH resources for feeding back HARQ-ACK is the same as when L is equal to 3, that is, HARQ-ACK information of the first PDSCH in the first 7 rows of table 8, HARQ-ACK information of the second PDSCH, HARQ-ACK information of the third PDSCH to PUCCH resources for feeding back HARQ-ACK is the same as correspondence of HARQ-ACK information of the first PDSCH, HARQ-ACK information of the second PDSCH, HARQ-ACK information of the third PDSCH to PUCCH resources for feeding back HARQ-ACK in the first 7 rows of table 6, and if the base station transmits the fourth PDSCH, and when the UE does not receive the fourth PDSCH, the inconsistency of the comprehension of the base station and the UE on the transmission of the HARQ-ACK information is avoided. And when the HARQ-ACK information of all PDSCHs is ACK, the UE does not feed back the HARQ-ACK information. The other method is to determine the transmission of the HARQ-ACK information of the PDSCH according to the method in table 9, and when all the HARQ-ACK information of the PDSCH is ACK, the UE feeds back the HARQ-ACK information.

Table 8: correspondence between HARQ-ACK information of PDSCH and PUCCH resource for feeding back HARQ-ACK

Table 9: correspondence between HARQ-ACK information of PDSCH and PUCCH resource for feeding back HARQ-ACK

By adopting the method, for a plurality of UEs receiving the multicast PDSCH, the HARQ-ACK information is transmitted by the plurality of UEs sharing the same PUCCH resource, thereby saving the PUCCH resource for transmitting the HARQ-ACK.

According to another embodiment of the present disclosure, a method performed by a base station in a wireless communication system is provided. The method can comprise the following steps: sending control information to the user equipment; transmitting a plurality of downlink data to the user equipment based on the control information; and receiving HARQ-ACK information from the user equipment on resources for receiving hybrid automatic repeat request acknowledgement, HARQ-ACK, information, wherein the resources are determined for the plurality of downlink data based on the control information and include: a first resource or resource pair determined for each of the plurality of downlink data for transmitting HARQ-ACK information; or one second resource or pair of resources determined for the plurality of downlink data for transmitting HARQ-ACK information.

FIG. 9 shows a block diagram of an example UE with a processor in accordance with an embodiment of the invention.

Referring to fig. 9, a UE 900 includes a transceiver 901, a processor 902, and a memory 903. Under the control of a controller 902 (which may be implemented as one or more processors), the UE 900 may be configured to perform the relevant operations performed by the UE in the above-described methods. Although the transceiver 901, the processor 902 and the memory 903 are shown as separate entities, they may be implemented as a single entity, such as a single chip. The transceiver 901, the processor 902 and the memory 903 may be connected, e.g., electrically connected or coupled, to each other. The transceiver 901 may transmit and receive signals to and from other network entities, such as a node (which may be, for example, a base station, a relay node, etc.) and/or another UE, etc. In some embodiments, transceiver 901 may be omitted. In this case, the processor 902 may be configured to execute instructions (including computer programs) stored in the memory 903 to control the overall operation of the UE 900, thereby implementing the operations in the flow of the above-described method.

FIG. 10 shows a block diagram of an example base station in accordance with an embodiment of the invention.

Referring to fig. 1010, a base station 1000 includes a transceiver 1001, a processor 1002, and a memory 1003. Under control of the processor 1002, which may be implemented as one or more processors, the base station 1000 may be configured to perform the relevant operations performed by the base station in the methods described above. Although the transceiver 1001, the processor 1002 and the memory 1003 are shown as separate entities, they may be implemented as a single entity, such as a single chip. The transceiver 1001, the processor 1002, and the memory 1003 may be connected, e.g., electrically connected or coupled, to each other. Transceiver 1001 may transmit and receive signals to and from other network entities, such as another node (which may be, for example, a base station, a relay node, etc.) and/or a UE, etc. In some embodiments, transceiver 1001 may be omitted. In this case, the processor 1002 may be configured to execute instructions (including computer programs) stored in the memory 1003 to control the overall operation of the base station 1000, thereby implementing the operations in the flow of the above-described method.

The application also provides a communication method which can effectively start and/or end the receiving of the PDSCH.

An embodiment of the present application provides a communication method, as shown in fig. 11, the method includes:

step S1101: acquiring first information for activating detection of a first type PDCCH;

step S1102: the first type PDCCH is detected, and the first type PDSCH is received according to the first type PDCCH.

And/or, as shown in fig. 12, the method comprises:

step S1201: acquiring second information for stopping the detection of the first type PDCCH;

step S1202: the detection of the first type PDCCH is stopped.

The first type PDSCH may be a multicast PDSCH or a broadcast PDSCH, or may be another type PDSCH, and the first type PDSCH is described below, or may be applied to the operation of another type PDSCH.

In this embodiment of the application, the process shown in fig. 11 and the process shown in fig. 12 may be executed separately or sequentially, and this embodiment of the application is not limited herein.

In this embodiment of the present application, for the method for starting receiving PDSCH shown in fig. 11, the method is implemented on the UE side, specifically, after acquiring (for example, may be received) the first information in step S1101, step S1102 may include the steps of:

step S11021: determining configuration information for detecting a first type PDCCH and configuration information for receiving a first type PDSCH based on the first information;

step S11022: starting detection of the first type PDCCH based on the determined configuration information for detecting the first type PDCCH;

step S11023: and receiving the first type PDSCH based on the detected first type PDCCH and the determined configuration information of the first type PDSCH.

It is to be understood that after the detection of the first type PDCCH is activated, the first type PDSCH may be further received, and for convenience of description, the procedure may be directly referred to as simply detecting the first type PDCCH and receiving the first type PDSCH hereinafter.

The first information may be at least one of physical layer signaling, medium access layer signaling, higher layer signaling (higher layer signaling configuration information), or reference signal indication information.

An embodiment when the first information is physical layer signaling is described below.

Namely, the UE activates to detect the first type PDCCH and receive the first type PDSCH through receiving the indication of the physical layer signaling.

An alternative solution is:

the physical layer signaling is a DCI (Downlink Control Information) format x (DCI format x, which may be an existing DCI format, for example, DCI formats 2 to 6, or a new DCI format), that is, the UE implements transmission of the first Information by receiving DCI of DCI format x. The first type PDCCH may be detected through a Common Search Space (CSS) based on DCI format x. The DCI format x may be transmitted in a CSS of a primary cell (Pcell) of the UE, or may be transmitted in a CSS of a configured secondary cell.

In this embodiment, DCI format x may be used to activate at least one UE to start detecting a first type PDCCH and receiving a first type PDSCH.

In this embodiment of the present application, the information transmitted in DCI format x may include:

information block 1, information block 2, …, information block N

Wherein, each UE can determine the location of its corresponding information block through the configuration of higher layer signaling.

In an embodiment of the present application, the first information includes at least one of:

an activation indication (which may be indicated by a preset bit);

detecting configuration information of a first type PDCCH;

configuration information for a first type PDSCH is received.

That is, the information in the information block of DCI format x may include:

-activation indication 0, 1bit

-detecting configuration information of a first type PDCCH and receiving configuration information of a first type PDSCH

In this embodiment of the present application, the number of bits for detecting the configuration information of the first type PDCCH is determined according to the number of configurations for detecting the first type PDCCH, that is, the number of bits for detecting the first type PDCCH and receiving the configuration information of the first type PDSCH is determined according to the number of configurations for detecting the first type PDCCH and receiving the first type PDSCH.

As an example, if there is only one set of configurations to detect the first type PDCCH and receive the first type PDSCH, the number of bits of configuration information to detect the first type PDCCH and receive the first type PDSCH may be 0 bit.

If a plurality of sets of configurations for detecting the first type PDCCH and receiving the first type PDSCH exist, the bit number for detecting the first type PDCCH and receiving the configuration information of the first type PDSCH is determined according to the configuration number M for detecting the first type PDCCH and receiving the first type PDSCH, and the bit number is

Bits of which the number of bits, among others,

for the upper rounding operation.

In the embodiment of the application, the first type PDCCH can be detected when the activation indication is a first preset value;

A person skilled in the art may set the first preset value and the second preset value according to an actual situation, which is not limited herein in the embodiment of the present application, and in an example, the first preset value may be 0 bit, and the second preset value may be 1 bit.

As an example, if the activation indication is 0 bit, the UE starts detecting the first type PDCCH and receiving the first type PDSCH as soon as it receives DCI of DCI format x. If the activation indication is 1bit, the UE finds the information block of the UE after receiving the DCI of the DCI format x, if the activation indication in the information block is '0', the UE does not start to detect the first type PDCCH and receive the first type PDSCH, and if the activation indication in the information block is '1', the UE starts to detect the first type PDCCH and receive the first type PDSCH according to the configuration information for detecting the first type PDCCH and receiving the first type PDSCH.

In the embodiment of the application, when the configuration for detecting the first type PDCCH is at least two sets, the configuration for detecting the first type PDCCH is determined according to the configuration information for detecting the first type PDCCH, and the first type PDCCH is detected according to the determined configuration for detecting the first type PDCCH.

If only one set of configuration is available for detecting the first type PDCCH and receiving the first type PDSCH, after the UE receives the activation information for detecting the first type PDCCH and receiving the first type PDSCH, the UE starts to detect the first type PDCCH and receive the first type PDSCH according to the configuration for detecting the first type PDCCH and receiving the first type PDSCH. If there is more than one set of configurations for detecting the first type PDCCH and receiving the first type PDSCH, the UE determines a configuration for detecting the first type PDCCH and receiving the first type PDSCH according to the configuration information for detecting the first type PDCCH and receiving the first type PDSCH, the determination method may determine the correspondence between the configuration information for detecting the first type PDCCH and receiving the first type PDSCH and the configuration for detecting the first type PDCCH and receiving the first type PDSCH, where the configuration information for detecting the first type PDCCH and receiving the first type PDSCH may be k bits, and k is a positive integer, for example, where k is 2 bits, and the correspondence between the configuration information for detecting the first type PDCCH and receiving the first type PDSCH and the configuration for detecting the first type PDCCH and receiving the first type PDSCH is shown in table 10. And after the UE determines the configuration for detecting the first type PDCCH and receiving the first type PDSCH, the UE starts to detect the first type PDCCH and receive the first type PDSCH according to the determined configuration for detecting the first type PDCCH and receiving the first type PDSCH.

Watch 10

Another alternative scheme is as follows:

the physical layer signaling is DCI format y (DCI format y may be an existing DCI format, for example, DCI format 1-1,0-1, or a new DCI format), and DCI format y may be used to activate a UE to detect the first type PDCCH. The first type PDCCH may be detected through a UE-specific Search Space (USS) based on the DCI format y.

In this embodiment of the present application, DCI format y may be distinguished according to a Radio Network Temporary Identity (RNTI) scrambled by a Cyclic Redundancy Check (CRC) of DCI format y, for example, the DCI of MBS (Multicast Broadcast Service) -start-RNTI scrambled CRC is a DCI including first information, and is used to activate and detect a first type PDCCH and receive the first type PDSCH.

Alternatively, DCI format y is distinguished using a DCI different from an existing DCI size (size) for activating detection of the first type PDCCH and receiving the first type PDSCH.

Alternatively, with DCI of one existing DCI size (size), DCI format y is distinguished by setting a field in DCI to a preset value, e.g., xxxx, for activating detection of a first type PDCCH and receiving a first type PDSCH.

an activation indication (which may be indicated by a preset bit);

detecting configuration information of a first type PDCCH;

configuration information for a first type PDSCH is received.

That is, the information of activating the detection of the first type PDCCH and receiving the first type PDSCH in DCI format y may include:

-activation indication 0, 1bit

Detecting a first type PD if there are multiple setsCCH and configuration for receiving the first type PDSCH, wherein the bit number for detecting the first type PDCCH and receiving the configuration information of the first type PDSCH is determined according to the configuration number M for detecting the first type PDCCH and receiving the first type PDSCH, and the bit number is

Bits of which the number of bits, among others,

for the upper rounding operation.

As an example, if the activation indication is 0 bit, the UE starts detecting the first type PDCCH and receiving the first type PDSCH as long as it receives DCI of DCI format y. If the activation indication is 1bit, the UE finds the information block of the UE after receiving the DCI of the DCI format y, if the activation indication in the information block is '0', the UE does not start to detect the first type PDCCH and receive the first type PDSCH, and if the activation indication in the information block is '1', the UE starts to detect the first type PDCCH and receive the first type PDSCH according to the configuration information for detecting the first type PDCCH and receiving the first type PDSCH.

In the embodiment of the application, when the configuration for detecting the first type PDCCH is at least two, the adopted configuration for detecting the first type PDCCH is determined according to the configuration information for detecting the first type PDCCH, and the first type PDCCH is detected according to the determined configuration for detecting the first type PDCCH.

The following describes an implementation when the first information is media access layer signaling.

Namely, the UE activates to detect the first type PDCCH and receive the first type PDSCH by receiving an indication of media access layer signaling (indication information of the media access layer).

an activation indication (which may be indicated by a preset bit);

detecting configuration information of a first type PDCCH;

configuration information for a first type PDSCH is received.

That is, the first information of the medium access layer signaling may include:

-activation indication 0, 1bit

Bits of which the number of bits, among others,

for the upper rounding operation.

As an example, if the activation indication is 0 bit, the UE starts to detect the first type PDCCH and receive the first type PDSCH as long as it receives the indication information of the medium access layer. If the activation indication is 1bit, after receiving the indication information of the media access layer, the UE finds an information block of the UE in the indication information, if the activation indication in the information block is '0', the UE does not start to detect the first type PDCCH and receive the first type PDSCH, and if the activation indication in the information block is '1', the UE starts to detect the first type PDCCH and receive the first type PDSCH according to the configuration information of detecting the first type PDCCH and receiving the first type PDSCH.

An embodiment when the first information is higher layer signaling is described below.

Namely, the UE activates to detect the first type PDCCH and receive the first type PDSCH by receiving the indication of the higher layer signaling.

an activation indication (which may be indicated by a preset bit);

detecting configuration information of a first type PDCCH;

configuration information for a first type PDSCH is received.

I.e. the first information of the higher layer signaling may comprise:

-activation indication 0, 1bit

In the embodiment of the application, when the configuration of the first type PDCCH is detected to be at least two sets, the first type PDCCH is detected according to the configuration of the first type PDCCH, which is detected by the high-level signaling indication.

If there is only one set of configurations to detect the first type PDCCH and receive the first type PDSCH, the number of bits to detect the first type PDCCH and receive the configuration information of the first type PDSCH may be 0 bit.

And if a plurality of sets of configurations for detecting the first type PDCCH and receiving the first type PDSCH exist, activating the adopted configurations for detecting the first type PDCCH and receiving the first type PDSCH by high-level signaling configuration.

As an example, if the activation indication is 0 bit, the UE starts to detect the first type PDCCH and receive the first type PDSCH as long as it receives the indication information of the higher layer signaling. If the activation indication is 1bit, after receiving the indication information of the high-level signaling, the UE finds the information block of the UE in the indication information, if the activation indication in the information block is '0', the UE does not start to detect the first type PDCCH and receive the first type PDSCH, and if the activation indication in the information block is '1', the UE starts to detect the first type PDCCH and receive the first type PDSCH according to the configuration information for detecting the first type PDCCH and receiving the first type PDSCH.

In this embodiment, for the above embodiments, each set of configurations for detecting the first type PDCCH and receiving the first type PDSCH may be configured by a higher layer signaling.

detecting a first type PDCCH and a serving cell receiving the first type PDSCH;

detecting a first type PDCCH and receiving a downlink BWP (Band Width Part ) of the first type PDSCH;

detecting control resource set (CORESET) configuration information of a first type PDCCH;

detecting Search space (Search space) configuration information of a first type PDCCH;

configuration information for a first type PDSCH is received.

The UE may obtain a serving cell in which the UE detects the first type PDCCH and receives the first type PDSCH by receiving configuration information for detecting the first type PDCCH and receiving the configuration information for the first type PDSCH, detect the first type PDCCH and receive BWP of the first type PDSCH, detect control resource set configuration information of the first type PDCCH, search space configuration information of the first type PDCCH, and the like. In addition, the UE knows whether the serving cell in which the UE detects the first type PDCCH and receives the first type PDSCH is currently an active serving cell. If the UE detects the first type PDCCH and the serving cell receiving the first type PDSCH is currently the active serving cell, the UE knows whether the downlink BWP detecting the first type PDCCH and receiving the first type PDSCH is the active BWP.

The following describes an embodiment of detecting the first type PDCCH and receiving the first type PDSCH according to an activation condition of a serving cell that detects the first type PDCCH and receives the first type PDSCH and an activation condition of a downlink BWP that detects the first type PDCCH and receives the first type PDSCH, respectively, when the UE receives the first information and has activated the UE to detect the first type PDCCH and receive the first type PDSCH, as shown in fig. 13, specifically including at least one of the following:

if the serving cell detecting the first-type PDCCH and receiving the first-type PDSCH is an active serving cell but the active bwpa in the active serving cell is not the BWP detecting the first-type PDCCH and receiving the first-type PDSCH, switching from the current active bwpa to a BWP B detecting the first-type PDCCH and receiving the first-type PDSCH, and the BWP B detecting the first-type PDCCH and receiving the first-type PDSCH becomes the active BWP B, detecting the first-type PDCCH in the active BWP B;

Further, if a second type PDCCH is configured and detected in BWP B and a second type PDSCH is received, the second type PDCCH is detected in active BWP B;

The above cases are described in detail below:

in the first case:

the serving cell that detects the first type PDCCH and receives the first type PDSCH is an active serving cell, and active bwpa in the active serving cell is BWP that detects the first type PDCCH and receives the first type PDSCH.

When the first information indicates activation of detection of the first type PDCCH and reception of the first type PDSCH, if a serving cell in which the UE detects the first type PDCCH and receives the first type PDSCH is an activated serving cell, an activated bwpa in the activated serving cell is BWP for detecting the first type PDCCH and receiving the first type PDSCH, and the first PDCCH search space (search space of the first type PDCCH) in the activated bwpa starts detection of the first type PDCCH and reception of the first type PDSCH. Before receiving the first information, since bwpa is active BWP, the UE has detected the second type PDCCH in the second PDCCH search space (search space of the second type PDCCH) in bwpa and received the second type PDSCH. After receiving the first information, the UE detects the second type PDCCH and receives the second type PDSCH in the second PDCCH search space in bwpa while detecting the first type PDCCH and receiving the first type PDSCH in the first PDCCH search space, as shown in fig. 14.

In the second case:

the serving cell that detects the first type PDCCH and receives the first type PDSCH is an active serving cell, and active bwpa in the active serving cell is not BWP that detects the first type PDCCH and receives the first type PDSCH.

When the first information indicates activation of detection of the first type PDCCH and reception of the first type PDSCH, if the UE detects the first type PDCCH and the serving cell receiving the first type PDSCH is the activated serving cell, the activated bwpa in the activated serving cell is not the BWP for detecting the first type PDCCH and receiving the first type PDSCH, switching from the currently activated bwpa to the BWP B for detecting the first type PDCCH and receiving the first type PDSCH, changing the BWP B for detecting the first type PDCCH and receiving the first type PDSCH to the activated BWP, and detecting the first type PDCCH and receiving the first type PDSCH in the activated BWP B. Before receiving the first information, since BWP a is active BWP, the UE has detected the second type PDCCH and received the second type PDSCH in the second PDCCH search space in BWP a, and after receiving the first information, the active BWP is changed from BWP a to BWP B, it is impossible for the UE to detect the second type PDCCH and receive the second type PDSCH in the second PDCCH search space in BWP a, and one method is that the UE detects the first type PDCCH and receives the first type PDSCH in BWP B, while if the UE is configured to detect the second type PDCCH and receive the second type PDSCH in BWP B, the UE detects the second type PDCCH and receives the second type PDSCH in the third PDCCH search space in BWP B, as shown in fig. 15. The benefit of using this approach is that the UE can continue detection of unicast PDCCH (second type PDCCH) while activating detection of multicast PDCCH (first type PDCCH).

Or, the serving cell that detects the first-type PDCCH and receives the first-type PDSCH is an active serving cell, the active bwpa in the active serving cell is not BWP that detects the first-type PDCCH and receives the first-type PDSCH, but the active bwpa in the active serving cell and the BWP B that detects the first-type PDCCH and receives the first-type PDSCH are a BWP pair, and the active BWP B is included in the active BWP a, the UE may simultaneously detect in the BWP a and the BWP B in the BWP pair, or the UE does not need BWP handover delay between detecting the first-type PDCCH and switching to detecting the second-type PDCCH and receiving the second-type PDSCH. Before receiving the first information, since BWP a is active BWP, the UE has detected the second type PDCCH and received the second type PDSCH in the second PDCCH search space in BWP a, and after receiving the first information, the UE can detect the second type PDCCH and receive the second type PDSCH in BWP a as well as detect the first type PDCCH and receive the first type PDSCH in BWP B, as shown in fig. 16. The benefit of using this method is that the UE can detect the first type PDCCH and the second type PDCCH simultaneously, i.e. the UE can receive multicast (first type) and unicast (second type) traffic simultaneously.

In the third case:

and when the first information indicates activation detection of the first type PDCCH and reception of the first type PDSCH, if a serving cell for detecting the first type PDCCH and receiving the first type PDSCH by the UE is an inactive serving cell, activating the serving cell, and activating detection of the first type PDCCH and reception of a BWP B of the first type PDSCH, and detecting the first type PDCCH and reception of the first type PDSCH in the activated BWP B.

Or, detecting the first type PDCCH and receiving the first type PDSCH in the active BWP B and simultaneously detecting the second type PDCCH and receiving the second type PDSCH in the active BWP B.

Or BWP B and BWP a are BWP pair, and the active BWP B is contained in the active BWP a, the UE may detect in BWP a and BWP B in the BWP pair at the same time, or the UE switches from BWP B detecting the first type PDCCH and receiving the first type PDSCH to BWP B detecting the second type PDCCH and receiving the second type PDSCH without BWP switch delay, and detects the second type PDCCH and receives the second type PDSCH in the active BWP a at the same time as detecting the first type PDCCH and receiving the first type PDSCH in the active BWP B.

Based on the above embodiments, further, the PDSCH is received based on the detected PDCCH.

In this embodiment of the present application, for the method for stopping receiving PDSCH shown in fig. 12, the method is implemented on the UE side, specifically, after determining the second information in step S1201, step S1202 may include the steps of:

step S12021: stopping detecting the first type PDCCH based on the second information;

step S12022: receiving a first type PDSCH based on the detected first type PDCCH;

step S12023: transmitting HARQ-ACK information of the first type PDSCH.

It is to be understood that after stopping detecting the first type PDCCH, the receiving of the first type PDSCH may be further stopped, and for convenience of description, the procedure may be directly referred to as simply stopping detecting the first type PDCCH and receiving the first type PDSCH hereinafter.

The second information is at least one of physical layer signaling, medium access layer signaling, higher layer signaling (higher layer signaling configuration information), or timing expiration information. Wherein the second information may be received for physical layer signaling, medium access layer signaling, or higher layer signaling.

Namely, the UE stops detecting the first type PDCCH and receives the first type PDSCH through receiving the indication of the physical layer signaling.

An alternative solution is:

the physical layer signaling is DCI format x (DCI format x may be an existing DCI format, e.g., DCI formats 2 to 6, or may be a new DCI format), that is, the UE transmits the second information by receiving DCI of DCI format x, and can detect the first type PDCCH through the common search space based on DCI format x. The DCI format x may be transmitted in the CSS of the primary cell of the UE, or may be transmitted in the CSS of the configured secondary cell.

In this embodiment, DCI format x may be used to stop at least one UE from detecting the first type PDCCH and receiving the first type PDSCH.

information block 1, information block 2, …, information block N

Each UE may determine the location of the information block corresponding to the UE through configuration of a higher layer signaling.

In an embodiment of the application, the second information includes a stop instruction.

That is, the information in the information block of DCI format x may include:

-stop indication 0, 1bit

In the embodiment of the present application, when the stop instruction is a third preset value, the detection of the first type PDCCH may be stopped;

A person skilled in the art may set the third preset value and the fourth preset value according to an actual situation, which is not limited in this embodiment of the application, and in an example, the third preset value may be 0 bit, and the fourth preset value may be 1 bit.

As an example, if the stop indication is 0 bit, the UE stops detecting the first type PDCCH and receiving the first type PDSCH as long as it receives DCI of DCI format x. If the stop indication is 1bit, the UE finds the information block of the UE in the DCI after receiving the DCI of the DCI format x, if the stop indication in the information block is '0', the UE does not stop detecting the first type PDCCH and receiving the first type PDSCH, and if the stop indication in the information block is '1', the UE stops detecting the first type PDCCH and receiving the first type PDSCH.

Another alternative scheme is as follows:

the physical layer signaling is DCI format y (DCI format y may be an existing DCI format, for example, DCI format 1-1,0-1, or may be a new DCI format), and DCI format y may be used to stop a UE from detecting the first type pdcch. The first type PDCCH may be detected through a UE-specific search space based on DCI format y.

In the embodiment of the application, the DCI format y may be distinguished according to the RNTI scrambled by the CRC of the DCI format y, for example, the DCI scrambled by the MBS-stop-RNTI is the DCI including the second information, and is used to stop detecting the first type PDCCH and receive the first type PDSCH.

Alternatively, DCI format y is distinguished using one DCI different from an existing DCI size (size) for stopping detecting the first type PDCCH and receiving the first type PDSCH.

Alternatively, with DCI of one existing DCI size (size), DCI format y is distinguished by setting a field in the DCI to a preset value, e.g., xxxx, for stopping detecting the first type PDCCH and receiving the first type PDSCH.

That is, the information of stopping detecting the first type PDCCH and receiving the first type PDSCH in DCI format y may include:

-stop indication 0, 1bit

As an example, if the stop indication is 0 bit, the detection of the first type PDCCH and the reception of the first type PDSCH are stopped as long as the UE receives DCI of DCI format y. If the stop indication is 1bit, the UE finds the information block of the UE after receiving the DCI of the DCI format y, if the stop indication in the information block is '0', the UE does not stop detecting the first type PDCCH and receiving the first type PDSCH, and if the stop indication in the information block is '1', the UE stops detecting the first type PDCCH and receiving the first type PDSCH.

The following describes an implementation when the second information is media access layer signaling.

Namely, the UE stops detecting the first type PDCCH and receiving the first type PDSCH by receiving an indication of media access layer signaling (indication information of the media access layer).

That is, the second information in the medium access layer signaling may include:

-stop indication 0, 1bit

As an example, if the stop indication is 0 bit, the UE stops detecting the first type PDCCH and receiving the first type PDSCH as long as it receives the indication information of the medium access layer. If the stop indication is 1bit, the UE finds the information block of the UE in the indication information after receiving the indication information of the media access layer, if the stop indication in the information block is '0', the UE does not stop detecting the first type PDCCH and receiving the first type PDSCH, and if the stop indication in the information block is '1', the UE stops detecting the first type PDCCH and receiving the first type PDSCH.

An embodiment when the second information is higher layer signaling is described below.

Namely, the UE stops detecting the first type PDCCH and receives the first type PDSCH by receiving the indication of the higher layer signaling.

I.e. the second information of the higher layer signaling may include:

-stop indication 0, 1bit

As an example, if the stop indication is 0 bit, as long as the UE receives the indication information of the higher layer signaling, the detection of the first type PDCCH and the reception of the first type PDSCH are ended. If the stop indication is 1bit, after receiving the indication information of the high layer signaling, the UE finds the information block of the UE in the indication information, if the stop indication in the information block is '0', the UE does not stop detecting the first type PDCCH and receiving the first type PDSCH, and if the stop indication in the information block is '1', the UE stops detecting the first type PDCCH and receiving the first type PDSCH.

An embodiment when the second information is the timing expiration information is described below.

The UE may stop detecting the first type PDCCH and receiving the first type PDSCH according to a time (Timer) expiration, and stop detecting the first type PDCCH and receiving the first type PDSCH if the Timer expires, where the Timer may be referred to as MBS Timer, that is, the UE may consider the Timer to be expired if the PDSCH (or PDCCH) is not received within a time interval (T). This Timer is for the first type PDCCH only and for receiving the first type PDSCH. For example, as shown in fig. 17, the UE receives the first-type PDSCH scheduled by the first-type PDCCH in time slot n, and the Timer restarts no matter how much the previous Timer value is (for example, Timer equals 3), that is, the Timer value becomes "0", and the UE does not receive the first-type PDSCH in time slot n +1, and so on until the Timer value equals to the threshold value T, which is called Timer expiration. By adopting the method, the detection of the multicast PDCCH (the first type PDCCH) can be stopped in time when the multicast service is stopped, and the power consumption of the UE is saved.

The following describes an embodiment after the UE receives the second information and has stopped detecting the first-type PDCCH and receiving the first-type PDSCH, and as shown in fig. 18, the following at least one is also included:

if the second type PDCCH does not need to be detected, switching the BWPs in the serving cell which detects the first type PDCCH and receives the first type PDSCH to a default BWP, or changing the serving cell which detects the first type PDCCH and receives the first type PDSCH to an inactive serving cell.

The above cases are described in detail below:

in the first case:

after the UE stops detecting the first type PDCCH and receiving the first type PDSCH, if the UE continues to detect the second type PDCCH and receive the second type PDSCH, the UE may stop detecting the first type PDCCH in the first PDCCH search space and still detect the second type PDCCH in the second PDCCH search space.

Whether the UE continues to detect the second-type PDCCH and receive the second-type PDSCH at the currently active BWP may be determined by whether an additional BWP inactivity (inactivity) Timer for the second-type PDSCH expires or whether other timers expire.

In the second case:

after the UE stops detecting the first type PDCCH and receiving the first type PDSCH, if the UE does not continue to detect the second type PDCCH and receive the second type PDSCH, the first method is: switch to default BWP. Or, after the UE stops detecting the first type PDCCH and receiving the first type PDSCH, if the UE does not continue to detect the second type PDCCH and receive the second type PDSCH, the second method is: a serving cell in which the first type PDCCH is detected and the first type PDSCH is received may become an inactive serving cell.

In this embodiment of the present application, whether the method one or the method two is adopted may be determined according to the states of the serving cells for detecting the first type PDCCH and receiving the first type PDSCH before the UE activates the detection of the first type PDCCH and receives the first type PDSCH, where the specific method is: if the UE detects the first type PDCCH and receives the first type PDSCH before activating the first type PDCCH and receiving the first type PDSCH, the method II is adopted, and if the UE detects the first type PDCCH and receives the first type PDSCH before activating the first type PDCCH and receiving the first type PDSCH, the method I is adopted.

In this embodiment of the present application, it is further required to determine a timing relationship for activating or stopping detecting the first type PDCCH, that is, the UE receives a command for activating or stopping detecting the first type PDCCH in the time slot n, and activates or stops detecting the first type PDCCH in the time slot n + k.

Specifically, in step S1102, the step of activating and detecting the first type PDCCH based on the first information includes: determining a second time slot for activating and detecting the first type PDCCH according to the first timing relationship and the first time slot for receiving the first information; detecting a first type PDCCH in a second time slot; the first timing relationship is determined according to whether a serving cell of the first type PDCCH is detected to be in an activated state and/or whether BWP in which the first type PDCCH is located is detected to be activated BWP;

in step S1202, the step of stopping detecting the first type PDCCH based on the second information includes: determining a fourth time slot for stopping detecting the first type PDCCH according to the second timing relation and the third time slot for receiving the second information; and stopping detecting the first type PDCCH in a fourth time slot, wherein the second timing relationship is determined according to the information type of the second information.

The timing relationship for activating and deactivating detection of the first type PDCCH is described below, respectively.

And activating the timing relation for detecting the first type PDCCH, namely that the UE receives a command for activating and detecting the first type PDCCH in a time slot n and activates and detects the first type PDCCH in a time slot n + k 1. The following cases are distinguished:

in the first case:

if the serving cell for detecting the first type PDCCH is in an inactive state, and the time required for activating the serving cell is relatively long, k1 is k1_1, the UE may determine the value of k1_1 by receiving a higher layer signaling configuration or presetting.

In the second case:

if the serving cell detecting the first type PDCCH is in an active state and the BWP detecting the first type PDCCH is not active BWP, the UE needs to switch to detect the BWP detecting the first type PDCCH, where k1 is k1_2, and the UE may determine the value of k1_2 by receiving higher layer signaling configuration or presetting.

In a third case:

if the serving cell detecting the first type PDCCH is in an active state and the BWP detecting the first type PDCCH is in an active BWP, where k1 is k1_3, the UE may determine the value of k1_3 by receiving higher layer signaling configuration or presetting.

The above k1_1, k1_2, and k1_3 can be independently determined, so that the detection of the first type PDCCH is started as soon as possible according to the time required for different situations. At least 2 of the above k1_1, k1_2, and k1_3 may be determined to be the same, for example, k1_1 and k1_2 are one value, which may reduce signaling overhead. The above-mentioned k1_1, k1_2, and k1_3 are indicative methods, and k1_2 ═ k1_1+ offset value _1, and k1_3 ═ k1_1+ offset value _2 may be used.

And stopping detecting the timing relation of the first type PDCCH, namely the UE receives a command of stopping detecting the first type PDCCH in the time slot n and stops detecting the first type PDCCH in the time slot n + k 2. The following cases are distinguished:

in the first case:

if the UE indicates to stop detecting the first type PDCCH by receiving the DCI information, k2 at this time is k2_1, the UE can determine a value of k2_1 by receiving higher layer signaling configuration or presetting.

In the second case:

if the UE stops detecting the first type PDCCH by receiving the indication of the media access layer signaling or the higher layer signaling, and k2 is k2_2 at this time, the UE can determine a value of k2_2 by receiving the higher layer signaling configuration or presetting.

The following describes if the activation or deactivation of the detection of the first type PDCCH and the reception of the first type PDSCH is done by DCI or media access layer signaling indication, and the DCI activation or deactivation is a group of UEs. Then, for this DCI or implementation of HARQ-ACK feedback for media access layer signaling.

In this embodiment of the application, when the first information is at least one of a physical layer signaling or a media access layer signaling, or the second information is at least one of a physical layer signaling or a media access layer signaling, and the first information or the second information corresponds to at least two terminals, the method further includes:

Specifically, the UE needs to feed back the HARQ-ACK when the state of detecting the first type PDCCH and receiving the first type PDSCH changes from inactive to active, the UE needs to feed back the HARQ-ACK when the state of detecting the first type PDCCH and receiving the first type PDSCH changes from active to inactive, the UE does not feed back the HARQ-ACK when the state of detecting the first type PDCCH and receiving the first type PDSCH does not change from inactive, and the UE does not feed back the HARQ-ACK when the state of detecting the first type PDCCH and receiving the first type PDSCH does not change from active. For example, 2 UEs are configured to detect the first type PDCCH and receive the first type PDSCH, which are UE-1 and UE-2, respectively, where UE-1 and UE-2 are in a state of activating detection of the first type PDCCH and receiving the first type PDSCH, and when receiving an indication message indicating that UE-1 changes from a state of activating detection of the first type PDCCH and receiving the first type PDSCH to a state of deactivating detection of the first type PDCCH and receiving the first type PDSCH, the indication message indicating that UE-2 does not change from a state of activating detection of the first type PDCCH and receiving the first type PDSCH, then UE-1 feeds back HARQ-ACK, and UE-2 does not feed back HARQ-ACK. Or 2 UEs are configured to detect the first type PDCCH and receive the first type PDSCH and are respectively UE-1 and UE-2, wherein the UE-1 and the UE-2 are in the states of stopping detecting the first type PDCCH and receiving the first type PDSCH, when receiving an indication message, the indication message indicates that the UE-1 is changed from the state of stopping detecting the first type PDCCH and receiving the first type PDSCH to the state of activating detecting the first type PDCCH and receiving the first type PDSCH, and the indication message indicates that the UE-2 is unchanged from the state of stopping detecting the first type PDCCH and receiving the first type PDSCH, at this time, the UE-1 feeds back HARQ-ACK, and the UE-2 does not feed back HARQ-ACK. The method has the advantages that the method can tell the base station the receiving conditions of the state change information of detecting the first type PDCCH and receiving the first type PDSCH, and can also lead the UE which does not change the states of detecting the first type PDCCH and receiving the first type PDSCH to save the resource and the consumed power of HARQ-ACK feedback.

An embodiment of switching BWP is described below, which can be used in situations where at least two search spaces exist simultaneously.

When the UE configures at least two Search Spaces (SSs) in one serving cell or one BWP pair, where the Search Space corresponding to the frequency domain resources within a certain frequency domain range is referred to as a first type Search Space, for example, as shown in fig. 19, the first type PDSCH scheduled by the first type PDCCH of the first type Search Space is limited to the common frequency domain resource range, and the second type Search Space may be located in any frequency domain range of the entire BWP, i.e., the first type Search Space for detecting the first type PDCCH is used to schedule the common frequency domain resource range, and the second type PDSCH scheduled by the second type PDCCH of the second type Search Space may be within the entire BWP frequency domain resource range.

In this embodiment, when there are at least 2 BWPs that contain the first type search space and the frequency domain range of the first BWP currently located is larger than the frequency domain ranges of the other BWPs, the method further includes at least one of:

Specifically, when there are at least 2 BWPs including common frequency domain resources, 2 timers (timers) may be defined, where one Timer is used to count reception of the second type PDSCH and is referred to as the second Timer, and another Timer is used to count reception of the first type PDSCH and is referred to as the first Timer. Taking the example that the base station configures 2 BWPs for the UE, which are respectively a first BWP and a second BWP, each BWP has a common frequency resource for receiving the PDSCH of the first type (the first BWP may be a BWP with a large frequency domain range, and the second BWP may be a BWP with a small frequency domain range), and the UE is located in the configured first BWP. If the second Timer expires (expires) and the first Timer does not expire, the UE may switch from the first BWP to the configured second BWP, and the UE continues to detect the first type PDCCH at the second BWP, so that the UE receives the PDCCH and the PDSCH in a small frequency range, which may save power consumption of the UE. When the first Timer expires and the second Timer expires, the UE may switch to a default bwp (default bwp) or an initial bwp (initial bwp). When the first Timer expires and the second Timer expires, the UE may stop detecting the first type PDCCH or may stop detecting the PDCCH in the first type search space.

An embodiment at BWP handover is described below.

In the embodiment of the present application, when a first type search space for detecting a first type PDCCH is included in a BWP before handover and a state of detecting the first type PDCCH is an active state, if the first type search space is included in the BWP after handover, the first type PDCCH is detected in active state in the BWP after handover, and if the first type search space is not included in the BWP after handover, the first type PDCCH is not detected in the BWP after handover;

Further, when the first type PDCCH is not detected in the post-handover BWP, at least one of the following is included:

and detecting that the state of the first-type PDCCH is a stop state, and if switching to a new BWP containing the first-type search space is performed, not detecting the first-type PDCCH in the new BWP when no new activation instruction exists.

And when the first type PDCCH is not detected after BWP handover, including at least one of:

and detecting that the state of the first type PDCCH is a stop state, and if switching to a third BWP in which the second type PDCCH is detected and the third BWP is in a pair with a fourth BWP in which the first type PDCCH is detected, not detecting the first type PDCCH in the fourth BWP when no new activation instruction exists.

When BWP is handed over, if the first-type PDCCH detection of the BWP before the handover is active, that is, the BWP before the handover contains a search space for detecting the first-type PDCCH, and the first-type PDCCH detection is in an active state, and the BWP after the handover contains a search space for detecting the first-type PDCCH, the first-type PDCCH detection in the BWP after the handover becomes in an active state.

When switching the BWP, if the first-type PDCCH detection of the BWP before switching is active, that is, the BWP before switching includes a search space for detecting the first-type PDCCH, and the first-type PDCCH detection is in an active state, and the BWP after switching does not include a search space for detecting the first-type PDCCH, the BWP after switching does not detect the first-type PDCCH. One method is that after the handover, the first-type PDCCH detection is still active, and if the handover is performed to the BWP including the search space for detecting the first-type PDCCH, the first-type PDCCH is continuously detected within the new BWP after the handover. Another method is that after handover, first-type PDCCH detection is in a deactivated state, and if the handover is to be performed to BWP including a search space for detecting the first-type PDCCH, if there is no new activation indication, the first-type PDCCH is not detected within the new BWP after the handover.

When BWP is handed over, if the first-type PDCCH detection in the pre-handover BWP pair is active, i.e. the pre-handover BWP and the first-type PDCCH specific BWP are paired and both are in an active state, and the post-handover BWP and the first-type PDCCH specific BWP are paired, the first-type PDCCH specific BWP paired with the post-handover BWP becomes active.

When switching BWP, if the first-type PDCCH in the pre-switching BWP pair is active, that is, the pre-switching BWP is a pair with the BWP specific to the first-type PDCCH and both are in an active state, and the post-switching BWP is not a pair with the BWP specific to the first-type PDCCH, the first-type PDCCH is not detected after switching BWP. One method is that after the handover, the first-type PDCCH detection is still in an active state, and if the handover is performed again to a BWP (i.e., a third BWP) that is a pair with a BWP specific to the first-type PDCCH (i.e., a fourth BWP), the first-type PDCCH is continuously detected within the new BWP specific to the first-type PDCCH. Another method is that after the handover, the first-type PDCCH detection is in a stopped state, if the handover is performed again to a BWP that is paired with the BWP specific to the first-type PDCCH, if there is no new activation indication, the first-type PDCCH is not detected within the BWP specific to the new first-type PDCCH.

With the above method, the reception of the multicast service can be started quickly without additional signaling.

In the embodiment of the present application, the foregoing embodiments may be applied to MBS, where in one embodiment, the first type PDSCH is multicast PDSCH, and the second type PDSCH is unicast PDSCH, and in other embodiments, other types of PDSCH may also be used. Similarly, the first type PDCCH is a multicast PDCCH, and the second type PDCCH is a unicast PDCCH.

The starting (activating) and ending (stopping) method for receiving the multicast PDSCH provided by the embodiment of the application can start and end the multicast PDSCH receiving in time and save the power consumption of UE as much as possible.

An embodiment of the present application further provides a communication apparatus, as shown in fig. 20, the communication apparatus 2000 may include: a first acquisition module 2001 and a detection and reception module 2002, wherein,

the first obtaining module 2001 is configured to obtain first information for activating the first type PDCCH detection;

the detecting and receiving module 2002 is configured to detect a first type PDCCH and receive a first type PDSCH according to the first type PDCCH;

or as shown in fig. 21, the communication device 2000 may include: a second acquisition module 2101 and a stopping module 2102, wherein,

the second obtaining module 2101 is configured to obtain second information for stopping the detection of the first type PDCCH;

the stopping module 2102 is configured to stop detecting the first type PDCCH.

In an optional implementation manner, the first information is at least one of physical layer signaling, medium access layer signaling, higher layer signaling, or reference signal indication information;

and/or the second information is at least one of physical layer signaling, medium access layer signaling, higher layer signaling, or timing expiration information.

In an optional implementation, the physical layer signaling is DCI format x or DCI format y.

In an alternative implementation, the first information includes at least one of:

an activation indication;

detecting configuration information of a first type PDCCH;

configuration information for a first type PDSCH is received.

In an optional implementation manner, when the detecting and receiving module 2002 is configured to detect the first type PDCCH, specifically:

In an alternative implementation manner, the number of bits for detecting the configuration information of the first type PDCCH is determined according to the number of configurations for detecting the first type PDCCH.

In an optional implementation manner, when the first information is a high layer signaling, the detecting and receiving module 2002 is specifically configured to, when detecting the first type PDCCH:

In an optional implementation, detecting configuration information of the first type PDCCH and receiving configuration information of the first type PDSCH includes at least one of:

detecting a first type PDCCH and a serving cell receiving the first type PDSCH;

detecting control resource set configuration information of a first type PDCCH;

detecting search space configuration information of a first type PDCCH;

configuration information for a first type PDSCH is received.

In an optional implementation manner, the detecting and receiving module 2002 is specifically configured to, when detecting the first type PDCCH, at least one of the following:

if the serving cell detecting the first type PDCCH and receiving the first type PDSCH is the active serving cell but the active BWP a in the active serving cell is not the BWP for detecting the first type PDCCH and receiving the first type PDSCH, switching from the current active BWP a to the BWP B for detecting the first type PDCCH and receiving the first type PDSCH, and changing the BWP B for detecting the first type PDCCH and receiving the first type PDSCH to the active BWP B, and detecting the first type PDCCH in the active BWP B;

In an optional implementation, the detecting and receiving module 2002, when configured to detect the first type PDCCH in active BWP B, is specifically configured to at least one of:

if the detection of the second-type PDCCH and the reception of the second-type PDSCH are configured in the BWP B, detecting the second-type PDCCH in the active BWP B;

In an optional implementation manner, the second information includes a stop indication, and the stopping module 2102, when configured to stop detecting the first type PDCCH, is specifically configured to at least one of:

In an alternative implementation, the stopping module 2102, after being configured to stop detecting the first type PDCCH, is further configured to at least one of:

detecting a first type PDCCH in a second time slot;

the stopping module 2102, when configured to stop detecting the first type PDCCH, is specifically configured to:

stopping detecting the first type PDCCH in a fourth time slot;

in an optional implementation manner, the first timing relationship is determined according to whether a serving cell of the first type PDCCH is detected to be in an active state and/or whether BWP where the first type PDCCH is located is detected to be active BWP;

In an optional implementation manner, when the first information or the second information corresponds to at least two terminals, the communication apparatus 2000 further includes a feedback module configured to:

In an alternative implementation, when there are at least 2 BWPs containing the first type search space and the frequency domain range of the first BWP currently located is larger than the frequency domain ranges of the other BWPs, the detecting and receiving module 2002 or the stopping module 2102 is further configured to at least one of:

In an alternative implementation, the detecting and receiving module 2002 or the stopping module 2102 is further configured to at least one of:

when a first type search space for detecting a first type PDCCH is contained in a BWP before switching and the state of detecting the first type PDCCH is an activated state, if the first type search space is contained in the BWP after switching, the first type PDCCH is activated and detected in the BWP after switching, and if the first type search space is not contained in the BWP after switching, the first type PDCCH is not detected in the BWP after switching;

In an alternative implementation, when the first type PDCCH is not detected within the post-handover BWP, the detecting and receiving module 2002 or the stopping module 2102 is configured to at least one of:

when the first type PDCCH is not detected after BWP handover, the detection and reception module 2002 or the stopping module 2102 is configured to at least one of:

In an optional implementation manner, the first type PDCCH is a multicast PDCCH, and the second type PDCCH is a unicast PDCCH.

It can be clearly understood by those skilled in the art that the communication device provided in the embodiment of the present application has the same implementation principle and the same technical effect as the foregoing method embodiment, and for convenience and brevity of description, corresponding contents in the foregoing method embodiment may be referred to where this embodiment is not mentioned, and are not repeated herein.

An embodiment of the present application further provides an electronic device (for example, a terminal device), including: a processor and a memory, the memory storing at least one instruction, at least one program, set of codes or set of instructions, which is loaded and executed by the processor to implement the respective content of the aforementioned method embodiments.

Optionally, the electronic device may further comprise a transceiver. The processor is coupled to the transceiver, such as via a bus. It should be noted that the transceiver in practical application is not limited to one, and the structure of the electronic device does not constitute a limitation to the embodiments of the present application.

The processor may be a CPU, general purpose processor, DSP, ASIC, FPGA or other programmable logic device, transistor logic device, hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. A processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a DSP and a microprocessor, or the like.

A bus may include a path that transfers information between the above components. The bus may be a PCI bus or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. The memory may be, but is not limited to, ROM or other type of static storage device that can store static information and instructions, RAM or other type of dynamic storage device that can store information and instructions, EEPROM, CD-ROM or other optical disk storage, optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

The embodiment of the present application also provides a computer-readable storage medium for storing computer instructions, which when run on a computer, enable the computer to execute the corresponding content in the foregoing method embodiments.

It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless otherwise indicated herein. Moreover, at least a portion of the steps in the flow chart of the figure may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

While the disclosure has been shown and described with reference to various embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents.

Claims

1. A method performed by a user equipment in a wireless communication system, comprising:

receiving control information from a base station;

receiving a plurality of downlink data from a base station based on the control information;

determining resources for transmitting hybrid automatic repeat request acknowledgement, HARQ-ACK, information for the plurality of downlink data based on the control information; and

transmitting HARQ-ACK information to the base station on the determined resources,

wherein determining resources for transmitting HARQ-ACK information comprises:

determining a first resource or resource pair for transmitting HARQ-ACK information for each of the plurality of downlink data; or

Determining one second resource or resource pair for transmitting HARQ-ACK information for the plurality of downlink data.

2. The method of claim 1, wherein in case one second resource or resource pair for transmitting HARQ-ACK information is determined, the user equipment bundles HARQ-ACK information of the plurality of downlink data and transmits the bundled HARQ-ACK information on the determined one second resource or resource pair.

3. The method of claim 1, wherein one second resource or resource pair for transmitting HARQ-ACK information is determined based on a predetermined rule.

4. The method of claim 1, wherein one second resource or resource pair for transmitting HARQ-ACK information is selected from a set of resources for transmitting HARQ-ACK information.

5. The method of claim 2, wherein,

transmitting the bundled HARQ-ACK information on the determined second resource if the bundled HARQ-ACK information is a Negative Acknowledgement (NACK), and not transmitting the bundled HARQ-ACK information if the bundled HARQ-ACK information is an Acknowledgement (ACK), or

And if the bundled HARQ-ACK information is NACK, sending the bundled HARQ-ACK information on one resource in the determined second resource pair, and if the bundled HARQ-ACK information is ACK, sending the bundled HARQ-ACK information on the other resource in the determined second resource pair.

6. The method of claim 3, wherein the predetermined rule comprises:

determining a resource or resource pair corresponding to the HARQ-ACK information of the downlink data as a second resource or resource pair when the HARQ-ACK information of only one downlink data among the plurality of downlink data is a Negative Acknowledgement (NACK); and

determining a resource or a resource pair corresponding to one of the more than one downlink data as a second resource or a resource pair when there is more than one downlink data of the plurality of downlink data for which the HARQ-ACK information is NACK.

7. The method of claim 6, wherein determining a resource or resource pair corresponding to one of the more than one downlink data as a second resource or resource pair comprises:

determining a resource or resource pair corresponding to a temporally first or temporally last downlink data of the more than one downlink data as a second resource or resource pair.

8. The method of claim 4, wherein the set of resources for transmitting HARQ-ACK information is determined based on a semi-static resource set determination or a dynamic resource set determination.

9. The method of claim 1, wherein, in case a first resource or resource pair for transmitting HARQ-ACK information is determined,

the first resource or resource pair is determined based on information related to resources of an uplink included in the control information, or

The first resource or resource pair is determined based on information related to resources of an uplink and information related to downlink allocation included in the control information.

10. The method of claim 1, wherein in case of determining a first resource or resource pair for transmitting HARQ-ACK information, for each downlink data:

transmitting the HARQ-ACK information on the determined first resource if the HARQ-ACK information is a negative acknowledgement NACK, and not transmitting the HARQ-ACK information if the HARQ-ACK information is an acknowledgement ACK, or

11. The method of claim 1, wherein the user equipment and at least one other user equipment transmit HARQ-ACK information for the same downlink data using the same first resource or resource pair or second resource or resource pair.

12. A method performed by a base station in a wireless communication system, comprising:

sending control information to the user equipment;

transmitting a plurality of downlink data to the user equipment based on the control information; and

receiving HARQ-ACK information from a user equipment on resources used for receiving hybrid automatic repeat request acknowledgement HARQ-ACK information,

wherein the resources are determined for the plurality of downlink data based on the control information and include:

a first resource or resource pair determined for each of the plurality of downlink data for transmitting HARQ-ACK information; or

One second resource or pair of resources for transmitting HARQ-ACK information determined for the plurality of downlink data.

13. A user equipment in a wireless communication system, comprising:

a memory storing instructions; and

a processor configured to execute the instructions to implement the method of any of claims 1 to 11.

14. A base station in a wireless communication system, comprising:

a memory storing instructions; and

a processor configured to execute the instructions to implement the method of claim 12.