CN115913488A

CN115913488A - Communication method and communication device

Info

Publication number: CN115913488A
Application number: CN202111160177.4A
Authority: CN
Inventors: 苏桐; 官磊
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2023-04-04

Abstract

The embodiment of the application provides a communication method and a communication device. The terminal equipment determines to feed back N pieces of feedback information in a NACK-only feedback mode by using a first type PUCCH resource according to the size relation between the number N of the feedback information of the multicast PDSCH needing to be fed back and a threshold value, or to feed back N pieces of feedback information in an ACK/NACK feedback mode by using a second type PUCCH resource, wherein the first type PUCCH resource is used in the NACK-only feedback mode of the PDSCH, the second type PUCCH resource is used in the ACK/NACK feedback mode of the PDSCH, and the first type PUCCH resource and the second type PUCCH resource are located in the same PUCCH configuration information or different PUCCH configuration information. The method defines PUCCH resources when the terminal equipment sends feedback information corresponding to the multicast PDSCH, and further realizes the feedback of the terminal equipment on the multicast PDSCH.

Description

Communication method and communication device

Technical Field

The embodiment of the present application relates to the field of communications, and in particular, to a communication method and a communication apparatus.

Background

Since hybrid automatic repeat request (HARQ) feedback is not introduced in the conventional fourth generation (4 g) broadcast by the physical layer, transmission efficiency is not high. In New Radio (NR), for a User Equipment (UE) in a connected state, a base station may use a multicast scheduling method instead of broadcasting, and introduce an HARQ feedback mechanism to improve transmission efficiency. For a UE in a Radio Resource Control (RRC) connection state, a base station issues a data service to the UE through a multicast or unicast transmission mode. A base station allocates a cell-radio network temporary identifier (C-RNTI) to a UE, and the UE receives a data service according to Downlink Control Information (DCI) scrambled by the C-RNTI, where the one-to-one data transmission is unicast. If a plurality of UEs receive the same data service, the base station allocates the same group-radio network temporary identifier (G-RNTI) to the UEs, different UEs can receive the same data service according to the DCI scrambled by the same G-RNTI, and such one-to-many data transmission is multicast. For a single UE, the base station may allocate C-RNTI to receive unicast traffic or G-RNTI to receive multicast traffic. It can be seen that when the number of users served is large, the unicast scheduling method occupies more downlink transmission resources than the multicast scheduling method, and at this time, the downlink resources can be saved by using the multicast scheduling method.

Currently, a base station configures Physical Uplink Control Channel (PUCCH) configuration information for feeding back feedback information corresponding to a multicast service to a UE receiving the multicast service. But the UE does not know how to send different amounts of feedback information corresponding to the multicast service.

Disclosure of Invention

The embodiment of the application provides a communication method and a communication device, after receiving a multicast PDSCH, UE can determine to use different types of PUCCH resources to send feedback information of the multicast PDSCH according to configured PUCCH configuration information and the number of different multicast PDSCHs, limited uplink resources can be reasonably utilized, and uplink feedback efficiency is improved.

In a first aspect, a communication method is provided, which may be executed by a terminal device, or may also be executed by a component (e.g., a chip or a circuit) of the terminal device, and this is not limited thereto, and for convenience of description, the following description will be made by taking the terminal device as an example.

The method can comprise the following steps: the method comprises the steps that terminal equipment receives N Physical Downlink Shared Channels (PDSCHs) sent by network equipment in a multicast mode, the feedback mode of the N PDSCHs is a first feedback mode, the first feedback mode is that positive Acknowledgement (ACK) is not fed back when the PDSCHs sent by the first network equipment are correctly received, or Negative Acknowledgement (NACK) is fed back when the PDSCHs sent by the network equipment are not correctly received, and N is a positive integer; the terminal equipment determines that N pieces of feedback information corresponding to N PDSCHs are fed back in a first time unit; if N is smaller than the threshold value, the terminal equipment sends N pieces of feedback information according to a first type Physical Uplink Control Channel (PUCCH) resource, and the first type PUCCH resource is used for carrying out feedback of a first feedback mode on a PDSCH sent by the network equipment; and if N is greater than the threshold, the terminal equipment sends N pieces of feedback information according to a second type PUCCH resource, the second type PUCCH resource is used for carrying out feedback of a second feedback mode on the PDSCH sent by the network equipment, the second feedback mode is that ACK is fed back when the first PDSCH sent by the network equipment is correctly received, and NACK is fed back when the first PDSCH sent by the network equipment is not correctly received, wherein the first type PUCCH resource and the second type PUCCH resource are located in the same PUCCH configuration information or different PUCCH configuration information.

Optionally, if N is equal to the threshold, the terminal device may send N feedback information using the first type PUCCH resource, and may also send N feedback information using the second type PUCCH resource, which is not limited in this application. For convenience of description, in the case where N is equal to the threshold, the following description will be given taking an example in which the terminal device transmits N pieces of feedback information using the PUCCH resource of the first type.

It can be understood that the above scheme may include two implementation manners:

the first method comprises the following steps: the first type PUCCH resource and the second type PUCCH resource are located in different PUCCH configuration information. Specifically, the first type PUCCH resource is located in the first PUCCH configuration information, and the second type PUCCH resource is located in the second PUCCH configuration information. Then, when N is less than or equal to the threshold, the feedback modes of the N PDSCHs are unchanged, that is, the feedback modes are still the first feedback mode, the terminal device determines a PUCCH resource of the first type in the first PUCCH configuration information, and then the terminal device sends N feedback information on the time-frequency resource determined by the PUCCH resource and the first time unit together; and if the N is greater than the threshold, changing the feedback modes of the N PDSCHs from the first feedback mode to a second feedback mode, determining a PUCCH resource of a second type in the second PUCCH configuration information by the terminal equipment, and then sending the N feedback information on the time-frequency resource determined by the PUCCH resource and the first time unit together by the terminal equipment.

And the second method comprises the following steps: the first type PUCCH resource and the second type PUCCH resource are located in the same PUCCH configuration information. Specifically, the first type PUCCH resource and the second type PUCCH resource are both located in the third PUCCH configuration information. If N is less than or equal to the threshold, the feedback manners of the N PDSCHs are unchanged, that is, the feedback manners remain the first feedback manner, the terminal device determines a PUCCH resource of the first type in the third PUCCH configuration information, and then the terminal device sends N feedback information on the time-frequency resource determined by the PUCCH resource and the first time unit; and if the N is greater than the threshold, changing the feedback modes of the N PDSCHs from the first feedback mode to the second feedback mode, determining a PUCCH resource of the second type in the third PUCCH configuration information by the terminal equipment, and then sending the N feedback information on the time-frequency resource determined by the PUCCH resource and the first time unit together by the terminal equipment.

Optionally, PUCCH configuration information where the first type PUCCH resource and the second type PUCCH resource are located may be configured by the network device and sent to the terminal device.

Based on the technical scheme, after receiving the multicast PDSCH, the UE can know how to send the feedback information corresponding to the multicast PDSCH according to the configured PUCCH configuration information. The scheme can more reasonably distribute uplink transmission resources according to the number of the feedback information, and improve the transmission efficiency. For example, when the number of feedback information is small, the terminal device may feed back on the first type PUCCH resource according to the first feedback manner, where the first type PUCCH resource is shared by multiple terminal devices, that is, the network device detects that there is feedback on the resource, and then the network device may reschedule the corresponding multicast PDSCH to the terminal devices, and since the retransmission scheduling of data may be multicast and/or broadcast, it is not necessary to distinguish which terminal device erroneously receives the multicast PDSCH, and the first type PUCCH resource may save the occupation of uplink resources; when the number of the feedback information is more, the terminal device can feed back on the PUCCH resource of the second type according to a second feedback mode, the PUCCH resource of the second type is different for each terminal device, and the network device can distinguish and determine the terminal device which needs to be retransmitted through the feedback of each terminal device on the PUCCH resource of the second type.

With reference to the first aspect, in some implementations of the first aspect, the first type PUCCH resource carries NACK information and does not carry ACK information; the second type PUCCH resources carry NACK information and/or ACK information.

With reference to the first aspect, in certain implementations of the first aspect, a PUCCH format of the first type PUCCH resource is format0 or format1.

With reference to the first aspect, in some implementations of the first aspect, when the threshold is 1, the sending N pieces of feedback information according to the first type PUCCH resource includes: when N =1, transmitting 1 NACK information according to the first type PUCCH resource; or, when the threshold is 2, transmitting N pieces of feedback information according to the first type PUCCH resource, including: when N =1, transmitting 1 NACK information according to the first type PUCCH resource; or, when N =2, transmitting 2 pieces of feedback information according to the first type PUCCH resource, where the 2 pieces of feedback information include at least one NACK information.

With reference to the first aspect, in some implementations of the first aspect, the threshold may be a protocol preset, or may be indicated to the terminal device by the network device.

In one possible implementation, the network device indicates the threshold to the terminal device through a radio access control RRC message or a media access control element (MAC CE) or Downlink Control Information (DCI).

Thus, the threshold value is indicated by the network device, so that the network device is more flexible to regulate and control, and the transmission requirements of communication are better matched.

With reference to the first aspect, in certain implementation manners of the first aspect, the first type PUCCH resource and the second type PUCCH resource are located in different PUCCH configuration information, the first type PUCCH resource is located in the first PUCCH configuration information, the second type PUCCH resource is located in the second PUCCH configuration information, the first PUCCH configuration information is used in the first feedback manner, and the second PUCCH configuration information is used in the second feedback manner.

With reference to the first aspect, in certain implementations of the first aspect, the first PUCCH configuration information includes one first PUCCH resource set for feeding back feedback information of the dynamically scheduled PDSCH, and the first PUCCH resource set includes at least one first type PUCCH resource.

With reference to the first aspect, in some implementations of the first aspect, the first PUCCH configuration information is multicast PUCCH configuration information corresponding to a first feedback scheme, and the second PUCCH configuration information is multicast PUCCH configuration information corresponding to a second feedback scheme, or the second PUCCH configuration information is unicast PUCCH configuration information corresponding to the second feedback scheme.

With reference to the first aspect, in certain implementations of the first aspect, the first type PUCCH resource and the second type PUCCH resource are located in third PUCCH configuration information, the third PUCCH configuration information is multicast PUCCH configuration information corresponding to the first feedback mode, the third PUCCH configuration information includes multiple PUCCH resource sets, the first type PUCCH resource is included in a first resource set of the multiple PUCCH resource sets, and the second type PUCCH resource is included in resource sets other than the first resource set; or the third PUCCH configuration information is multicast PUCCH configuration information corresponding to the second feedback scheme, or the third PUCCH configuration information is unicast PUCCH configuration information corresponding to the second feedback scheme, where the third PUCCH configuration information includes a plurality of PUCCH resource sets, the first type PUCCH resource is included in a first resource set of the PUCCH resource sets, and the second type PUCCH resource is included in any one of the PUCCH resource sets.

In a second aspect, a communication method is provided, which may be executed by a network device, or may also be executed by a component (e.g., a chip or a circuit) of the network device, and this is not limited thereto, and for convenience of description, the following description will be made by taking the network device as an example.

The method can comprise the following steps: the method comprises the steps that the network equipment sends N Physical Downlink Shared Channels (PDSCHs) to the terminal equipment in a multicast mode, the feedback mode of the N PDSCHs is a first feedback mode, the first feedback mode is that positive Acknowledgement (ACK) is not fed back when the PDSCHs sent by the network equipment are correctly received, or Negative Acknowledgement (NACK) is fed back when the PDSCHs sent by the network equipment are not correctly received, N is a positive integer, and N feedback information corresponding to the N PDSCHs is fed back in a first time unit; or, if N is less than or equal to the threshold, the network device receives N pieces of feedback information according to the first type physical uplink control channel PUCCH resource, where the first type PUCCH resource is used for performing feedback of the first feedback mode on the PDSCH sent by the network device; if N is larger than the threshold, the network equipment receives N pieces of feedback information according to a second type PUCCH resource, the second type PUCCH resource is used for feeding back a PDSCH sent by the network equipment in a second feedback mode, the second feedback mode is to feed back ACK when the PDSCH sent by the network equipment is correctly received or to feed back NACK when the PDSCH sent by the network equipment is not correctly received, wherein the first type PUCCH resource and the second type PUCCH resource are located in the same PUCCH configuration information or different PUCCH configuration information.

With reference to the second aspect, in some implementations of the second aspect, the first type PUCCH resource carries NACK information and does not carry ACK information; the second type PUCCH resources carry NACK information and/or ACK information.

With reference to the second aspect, in certain implementations of the second aspect, the PUCCH format of the first type PUCCH resource is format0 or format1.

With reference to the second aspect, in some implementations of the second aspect, when the threshold is 1, the receiving, by the terminal device, N pieces of feedback information corresponding to N PDSCHs fed back in the first time unit according to the first type PUCCH resource includes: when N =1, receiving 1 NACK information fed back by the terminal equipment in a first time unit according to the first type PUCCH resource; or, when the threshold is 2, receiving N feedback information corresponding to the N PDSCHs fed back by the terminal device in the first time unit according to the first type PUCCH resource, where the N feedback information includes: when N =1, receiving 1 NACK information fed back by the terminal equipment in a first time unit according to the first type PUCCH resource; or when N =2, receiving 2 pieces of feedback information fed back by the terminal device in the first time unit according to the first type PUCCH resource, where the 2 pieces of feedback information include at least one NACK information.

With reference to the second aspect, in some implementation manners of the second aspect, the first type PUCCH resource and the second type PUCCH resource are located in different PUCCH configuration information, the first type PUCCH resource is located in first PUCCH configuration information, the second type PUCCH resource is located in second PUCCH configuration information, the first PUCCH configuration information is used for the first feedback manner, and the second PUCCH configuration information is used for the second feedback manner.

With reference to the second aspect, in certain implementations of the second aspect, the first PUCCH configuration information includes one first PUCCH resource set for feeding back feedback information of the dynamically scheduled PDSCH, and the first PUCCH resource set includes at least one first type PUCCH resource.

With reference to the second aspect, in some implementation manners of the second aspect, the first PUCCH configuration information is multicast PUCCH configuration information corresponding to the first feedback manner; the second PUCCH configuration information is multicast PUCCH configuration information corresponding to the second feedback mode, or the second PUCCH configuration information is unicast PUCCH configuration information corresponding to the second feedback mode.

With reference to the second aspect, in certain implementations of the second aspect, the first type PUCCH resource and the second type PUCCH resource are located in third PUCCH configuration information, the third PUCCH configuration information is multicast PUCCH configuration information corresponding to the first feedback mode, the third PUCCH configuration information includes multiple PUCCH resource sets, the first type PUCCH resource is included in a first resource set of the multiple PUCCH resource sets, and the second type PUCCH resource is included in resource sets other than the first resource set; or the third PUCCH configuration information is multicast PUCCH configuration information corresponding to the second feedback scheme, or the third PUCCH configuration information is unicast PUCCH configuration information corresponding to the second feedback scheme, where the third PUCCH configuration information includes a plurality of PUCCH resource sets, the first type PUCCH resource is included in a first resource set of the PUCCH resource sets, and the second type PUCCH resource is included in any one of the PUCCH resource sets.

In a third aspect, a communication device is provided, where the communication device is configured to perform the method provided in the first aspect. In particular, the apparatus may comprise means and/or modules, such as a processing unit and/or a communication unit, for performing the method provided by the first aspect or any of the above-described implementations of the first aspect.

In one implementation, the apparatus is a terminal device. When the apparatus is a terminal device, the communication unit may be a transceiver, or an input/output interface; the processing unit may be at least one processor. Alternatively, the transceiver may be a transmit-receive circuit. Alternatively, the input/output interface may be an input/output circuit.

In another implementation, the apparatus is a chip, a system of chips, or a circuit for use in a terminal device. When the device is a chip, a chip system or a circuit used in a terminal device, the communication unit may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip, the chip system or the circuit; the processing unit may be at least one processor, processing circuitry, logic circuitry, or the like.

The advantageous effects of the method according to the above third aspect and its possible designs can be referred to the advantageous effects of the first aspect and its possible designs.

In a fourth aspect, a communication device is provided for performing the method provided by the second aspect. In particular, the apparatus may comprise means and/or modules, such as a processing unit and/or a communication unit, for performing the method provided by the second aspect or any one of the above-mentioned implementation manners of the second aspect.

In one implementation, the apparatus is a network device. When the apparatus is a network device, the communication unit may be a transceiver, or an input/output interface; the processing unit may be at least one processor. Alternatively, the transceiver may be a transmit-receive circuit. Alternatively, the input/output interface may be an input/output circuit.

In another implementation, the apparatus is a chip, a system-on-chip, or a circuit for use in a network device. When the device is a chip, a chip system or a circuit used in a terminal device, the communication unit may be an input/output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip, the chip system or the circuit; the processing unit may be at least one processor, processing circuitry, logic circuitry, or the like.

The advantageous effects of the method presented above in the fourth aspect and its possible designs may be referred to the advantageous effects in the second aspect and its possible designs.

In a fifth aspect, a communication apparatus is provided, the apparatus comprising: comprising at least one processor coupled to at least one memory, the at least one memory for storing a computer program or instructions, the at least one processor being configured to retrieve and execute the computer program or instructions from the at least one memory such that the communication device performs the method of the first aspect or any possible implementation thereof.

In one implementation, the apparatus is a terminal device.

In another implementation, the apparatus is a chip, a system of chips, or a circuit for use in a terminal device.

The advantageous effects of the method according to the fifth aspect and its possible designs may be referred to in the first aspect and its possible designs.

In a sixth aspect, there is provided a communication apparatus comprising: comprising at least one processor coupled to at least one memory, the at least one memory for storing a computer program or instructions, the at least one processor being configured to retrieve and execute the computer program or instructions from the at least one memory such that the communication device performs the method of the second aspect or any possible implementation thereof.

In one implementation, the apparatus is a network device.

In another implementation, the apparatus is a chip, a system of chips, or a circuit for use in a network device.

The advantageous effects of the method as shown above in the sixth aspect and its possible designs may be referred to in the second aspect and its possible designs.

In a seventh aspect, the present application provides a processor configured to perform the method provided by the above aspects.

If the operations of sending, obtaining, receiving and the like related to the processor are not specifically described, or if the operations are not contradicted by the actual role or the inherent logic thereof in the related description, the operations of outputting, receiving, inputting and the like of the processor may be understood, and the operations of sending and receiving performed by the radio frequency circuit and the antenna may also be understood, which is not limited in this application.

In an eighth aspect, a computer-readable storage medium is provided, which stores program code for execution by a device, the program code comprising instructions for performing the method provided by the first aspect or any of the above-mentioned implementations of the second aspect or the second aspect.

A ninth aspect provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method as provided by the first aspect or any one of the above-mentioned implementations of the second aspect or the second aspect.

A tenth aspect provides a chip, where the chip includes a processor and a communication interface, and the processor reads instructions stored in a memory through the communication interface to execute the method provided by the first aspect or any one of the foregoing implementation manners of the first aspect or the foregoing implementation manners of the second aspect or any one of the foregoing implementation manners of the second aspect.

Optionally, as an implementation manner, the chip further includes a memory, the memory stores a computer program or an instruction, and the processor is configured to execute the computer program or the instruction stored on the memory, and when the computer program or the instruction is executed, the processor is configured to execute the method provided by the foregoing first aspect or the foregoing any implementation manner of the second aspect.

In an eleventh aspect, a communication system is provided, which includes the communication apparatus shown in the fifth and sixth aspects.

Drawings

Fig. 1 is a schematic diagram of a network architecture according to an embodiment of the present application.

Fig. 2 is a schematic diagram of a base station unicast PDSCH and multicast PDSCH.

Fig. 3 is a schematic flow chart of a communication method proposed by the present application.

Fig. 4 is a schematic diagram of the UE transmitting feedback information corresponding to 1 multicast PDSCH in one timeslot when the threshold is 1.

Fig. 5 is a schematic diagram of the UE transmitting feedback information corresponding to 2 multicast PDSCHs in one time slot when the threshold is 1.

Fig. 6 is a schematic diagram of the UE transmitting feedback information corresponding to 2 multicast PDSCHs in one time slot when the threshold is 2.

Fig. 7 is a schematic diagram of the UE sending feedback information corresponding to 3 multicast PDSCHs in one time slot when the threshold is 2.

Fig. 8 is a schematic diagram of the UE transmitting feedback information corresponding to 1 multicast PDSCH in one timeslot when the threshold is 1.

Fig. 9 is a schematic diagram of the UE transmitting feedback information corresponding to 2 multicast PDSCHs in one time slot when the threshold is 1.

Fig. 10 is a schematic diagram of the UE transmitting feedback information corresponding to 2 multicast PDSCHs in one time slot when the threshold is 2.

Fig. 11 is a schematic diagram of the UE transmitting feedback information corresponding to 3 multicast PDSCHs in one time slot when the threshold is 2.

Fig. 12 is a schematic block diagram of a communication device 1000 provided herein.

Fig. 13 is a schematic configuration diagram of the communication device 10 provided in the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Long Term Evolution (LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD) system, a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication system, a fifth generation (5 g) system or a New Radio (NR) and future communication systems, vehicle-to-other devices (vehicle-to-8978 zft 8978X), wherein the V2X may include vehicle-to-internet (V2N), vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P), etc., long term evolution (LTE-V) for vehicle-to-vehicle communication, internet of vehicles (IoT), long term evolution (LTE-M) for machine-to-machine communication, MTC, internet of things (IoT), long term evolution (LTE-M) for machine-to-machine communication, M2M, etc.

Fig. 1 is a schematic diagram of a network architecture according to an embodiment of the present application. As shown in fig. 1, the communication system of the embodiment of the present application may include a network device and a plurality of terminal devices. The network device may include 1 antenna or multiple antennas. Additionally, the network device can additionally include a transmitter chain and a receiver chain, each of which can in turn comprise a plurality of components associated with signal transmission and reception (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, antennas, etc.), as will be appreciated by one skilled in the art.

The network device may communicate with a plurality of terminal devices. The terminal device in the embodiment of the present application may also be referred to as: user Equipment (UE), mobile Station (MS), mobile Terminal (MT), access terminal, subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user device, etc.

The terminal device may be a device providing voice/data connectivity to a user, e.g. a handheld device, a vehicle mounted device, etc. with wireless connection capability. Currently, some examples of terminal devices are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (smart), a wireless terminal in city (smart city), a wireless terminal in smart home (smart home), a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol), SIP) phone, wireless Local Loop (WLL) station, personal Digital Assistant (PDA), handheld device with wireless communication capability, computing device or other processing device connected to a wireless modem, in-vehicle device, wearable device, terminal device in a 5G network or terminal device in a future-evolved Public Land Mobile Network (PLMN), and/or any other suitable device for communicating over a wireless communication system, as embodiments of the present application are not limited thereto.

Wherein, wearable equipment also can be called as wearing formula smart machine, is the general term of using wearing formula technique to carry out intelligent design, developing the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets for physical sign monitoring, smart jewelry and the like.

In addition, in the embodiment of the application, the terminal device can also be a terminal device in an internet of things system, the IoT is an important component of future information technology development, and the main technical characteristic is that an article is connected with a network through a communication technology, so that man-machine interconnection and intelligent network of object-object interconnection are realized.

In addition, in this embodiment of the present application, the terminal device may further include sensors such as an intelligent printer, a train detector, and a gas station, and the main functions include collecting data (part of the terminal device), receiving control information and downlink data of the network device, sending electromagnetic waves, and transmitting uplink data to the network device.

The network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may be a Base Transceiver Station (BTS) in a global system for mobile communications (GSM) system or a Code Division Multiple Access (CDMA) system, a base station B (nodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) system, an evolved base station B (eNB, or eNodeB) in an LTE system, a wireless controller in a Cloud Radio Access Network (CRAN) scenario, a Radio Network Controller (RNC), a base station controller (base station controller, BSC), a home base station controller (e.g., home evolved nodeB, or home nodeB, HNB), baseband unit (BBU), or the network device may be a relay station, an access point, a vehicle-mounted device, a wearable device, and a network device in a 5G network or a network device in a future evolved PLMN network, and the like, may be an Access Point (AP), a wireless relay node, a wireless backhaul node, a Transmission Point (TP), or a Transmission and Reception Point (TRP) in a WLAN, may be a gNB or a transmission point (TRP or TP) in a new radio, NR) system, or one or a group (including multiple antenna panels) of antenna panels of a base station in a 5G system, or may also be a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), a Distributed Unit (DU), or the like, which is not limited in the embodiments of the present application.

In some deployments, the gNB may include a Centralized Unit (CU) and a DU. The gNB may further include an Active Antenna Unit (AAU). The CU implements part of the function of the gNB, and the DU implements part of the function of the gNB, for example, the CU is responsible for processing non-real-time protocols and services, and implementing functions of a Radio Resource Control (RRC) layer and a packet data convergence layer (PDCP) layer. The DU is responsible for processing a physical layer protocol and a real-time service, and implements functions of a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a Physical (PHY) layer. The AAU implements part of the physical layer processing functions, radio frequency processing and active antenna related functions. Since the information of the RRC layer eventually becomes or is converted from the information of the PHY layer, the higher layer signaling, such as the RRC layer signaling, may also be considered to be transmitted by the DU or by the DU + AAU under this architecture. It is to be understood that the network device may be a device comprising one or more of a CU node, a DU node, an AAU node. In addition, the CU may be divided into network devices in an access network (RAN), or may be divided into network devices in a Core Network (CN), which is not limited in this application.

Referring to fig. 2, fig. 2 is a schematic diagram of a base station unicast PDSCH and multicast PDSCH. As shown in fig. 2, for UE1 and UE2, PDSCH #1 on downlink time slot 0 is unicast scheduled by the base station to UE1, PDSCH #2 on downlink time slot2 is multicast scheduled by the base station to UE1 and UE2, and PDSCH #3 on downlink time slot 4 is unicast scheduled by the base station to UE 2.

Wherein, for each PDSCH, a data scheduling method is corresponding. One is dynamic scheduling, that is, a Physical Downlink Control Channel (PDCCH) is transmitted to schedule a PDSCH, and before each PDSCH is transmitted, a PDCCH needs to be transmitted, that is, the PDSCH which is normally scheduled is the PDSCH with scheduling information. One is semi-persistent scheduling (SPS), that is, sending a PDCCH to activate SPS configuration. The UE receives a plurality of PDSCHs according to the SPS configuration activated by the PDCCH. Specifically, the SPS configuration includes a configuration such as a period, and the UE may receive multiple PDSCHs in multiple slots (slots) according to the configuration such as the period in the SPS configuration information, where the multiple PDSCHs are distinguished from dynamic scheduling and do not have PDCCH scheduling.

Currently, there are two feedback methods for the UE to receive the multicast PDSCH: in the first feedback mode, if the PDSCH receives correctly, the UE does not feed back, or feeds back ACK information, and if the PDSCH receives incorrectly, the UE feeds back NACK information; in the second feedback mode, if the PDSCH receives correctly, the UE feeds back ACK information, and if the PDSCH receives incorrectly, the UE feeds back NACK information. The unicast feedback mode is a second feedback mode.

It is to be understood that any one of the descriptions "if", "when … …" or "in case … …" can be used in the description of the possible conditions in the present application, and the three descriptions can be replaced with each other in the present application, which is not limited in the present application.

It should be understood that, for the UE, the feedback information of the PDSCH, whether unicast or multicast, needs to be transmitted on the PUCCH resource, and therefore, the base station needs to configure the PUCCH configuration information for feeding back the PDSCH corresponding feedback information for the UE. Since there are two different feedback methods for multicast, the PUCCH configuration information corresponding to multicast PDSCH feedback includes multicast PUCCH configuration information corresponding to the first feedback method and/or multicast PUCCH configuration information corresponding to the second feedback method. In addition, the network device may also send the PDSCH to the terminal device in a unicast manner, and since the unicast has only one feedback manner, the unicast PDSCH feeds back the corresponding PUCCH configuration information as unicast PUCCH configuration information corresponding to the second feedback manner.

Regardless of the unicast PUCCH configuration information or the multicast PUCCH configuration information, the configuration information includes:

(1) dl-DataToUL-ACK: a set of values, where the UE may perform PDSCH feedback in time units indicated by the values in the set, which will be described in detail below and will not be described herein.

(2) PUCCH resource set (PUCCH resource set): the base station can configure the UE with 4 PUCCH resource sets at most, and each resource set comprises a plurality of PUCCH resources. And the UE determines one set from the 4 PUCCH resource sets according to the size of the feedback information or the size of the codebook of the feedback information. There is also one resource list (resource list) in the resource set, and the resource list is composed of IDs of a plurality of PUCCH resources.

(3) PUCCH resource (PUCCH resource): the base station configures the UE with 32 PUCCH resources at most, and each resource has an ID. The configuration of the PUCCH resource further includes a starting PRB of the resource, whether to hop frequency, and a format (format) corresponding to the resource.

(4) And (3) format: there are 5 PUCCH format (

format

0,1,2,3,4) configurations, and the configuration of format0 includes an initial cyclic shift, a time domain symbol length of a PUCCH resource, and a time domain start position. The configuration of format1 includes an initial cyclic shift, a time domain symbol length of a PUCCH resource, a time domain start position, and an index of a used orthogonal superposition code or orthogonal sequence. The configuration of formats 2 to 3 includes the number of PRBs occupied by PUCCH resources, the time domain symbol length of PUCCH resources, and the time domain starting position. The configuration of format 4 includes the number of PRBs occupied by PUCCH resources, the index of the orthogonal superposition code used, the length of the orthogonal superposition code used, and the time domain starting position. The PUCCH resources with format0 or format1 in the format are in the first PUCCH resource set, and the PUCCHs with other formats are in PUCCH resource sets except the first resource set.

For the convenience of understanding the present application, the feedback of the unicast PDSCH will be described first with reference to the unicast PDCCH configuration information.

As described above, the UE receives DCI scrambled by the C-RNTI, a "Time domain resource assignment" bit field in the DCI indicates Time domain information of the PDSCH unicast scheduled by the base station, including a start symbol, a Time domain length, and the like, the UE receives the PDSCH in a corresponding Time unit according to the bit field, if the reception is correct, the UE feeds back ACK information, and if the reception is incorrect, the UE feeds back NACK information. When the feedback information of the PDSCH is fed back, the UE determines in which time unit the feedback information of the PDSCH is fed back according to the "PDSCH-to-feedback timing indicator" bit field in the DCI and the dl-datatoal-ACK in the unicast PUCCH configuration information, for example, the "PDSCH-to-feedback timing indicator" bit field is 00, the first set of dl-datatoal-ACK indications in the unicast PDCCH configuration information is {2, 4, 6, 8}, and 00 indicates that the first value "2" of the first set is selected, that is, 2 time units are spaced between the time unit where the PDSCH received by the UE is located and the time unit where the feedback information of the PDSCH is fed back. It can be understood that 2 time units are spaced between the time unit where the PDSCH is located and the time unit where the feedback information of the PDSCH is fed back, that is, 2 time units are spaced between the starting symbol of the time unit where the PDSCH is located and the starting symbol of the time unit where the feedback information of the PDSCH is fed back; or, 2 time units are spaced between the last symbol of the time unit where the PDSCH is located and the last symbol of the time unit where the feedback information of the PDSCH is fed back. Similarly, 01 denotes a second value "4" of the first set, that is, 4 time units are separated from the time unit in which the PDSCH received by the UE is located to the time unit in which the feedback information of the PDSCH is fed back, and so on, which is not described herein again.

After determining the feedback time unit of the PDSCH, the UE further needs to determine the time domain resource and the frequency domain resource for sending the feedback information, that is, determine the PUCCH resource for sending the feedback information. For example, N unicast PDSCHs of the UE all need to be fed back in the time unit #1, if the scheduling mode of the PDSCH is dynamic scheduling, the UE determines a PUCCH resource set for dynamic scheduling in the unicast PUCCH configuration information according to the size of N, and then selects a PUCCH resource in the PUCCH resource set according to the value of the "PUCCH resource indicator" bit field in the DCI, that is, determines which Orthogonal Frequency Division Multiplexing (OFDM) symbols and which Physical Resource Blocks (PRBs) in the time unit #1 transmit feedback information. The method for selecting PUCCH resources in the selected PUCCH resource set according to the "PUCCH resource indicator" bit field is similar to the method for determining the feedback time unit in the above example, and is not described herein again; and if the dispatching mode of the PDSCH is the SPS, the UE determines a PUCCH resource in the PUCCH resource set of the SPS of the unicast PUCCH configuration information according to the size of the N.

The technical solution proposed in the present application is described in detail below with reference to fig. 3, which makes clear how the UE sends the feedback information corresponding to the multicast PDSCH after receiving the multicast PDSCH.

Referring to fig. 3, fig. 3 is a schematic flow chart of a communication method proposed by the present application.

And S310, the network equipment sends N PDSCHs to the terminal equipment in a multicast mode, the feedback mode of the N PDSCHs is a first feedback mode, and N is a positive integer.

Correspondingly, the terminal device receives the N PDSCHs sent by the network device in a multicast mode. The first feedback mode is to not feed back Acknowledgement (ACK) information when the PDSCH transmitted by the first network device is correctly received, or to feed back Negative Acknowledgement (NACK) information when the first PDSCH transmitted by the network device is not correctly received.

It is to be understood that multicast in the present application may also be understood as multicast or broadcast. That is, the network device schedules a group of terminal devices to receive the same downlink data.

S320, the terminal device determines to feed back N pieces of feedback information corresponding to the N PDSCHs in the first time unit.

For how the terminal device determines the time unit for sending the feedback information, see the description above, and are not described here again.

It should be noted that N pieces of feedback information need to be fed back in the first time unit at the same time.

Alternatively, one time unit represents one slot, including 14 OFDM symbols.

Alternatively, a time unit may also represent a sub-slot, including 2 OFDM symbols or 7 OFDM symbols.

And S330, the terminal equipment determines to feed back N pieces of feedback information in a first feedback mode by using the first type PUCCH resource or feed back N pieces of feedback information in a second feedback mode by using the second type PUCCH resource according to the size relation between N and the threshold, wherein the first type PUCCH resource and the second type PUCCH resource can be located in the same PUCCH configuration information or in different PUCCH configuration information.

Specifically, if N is smaller than the threshold, the terminal device sends N pieces of feedback information according to a first type PUCCH resource, where the first type PUCCH resource is used for performing feedback in a first feedback manner on a PDSCH sent by the network device; and if the N is greater than the threshold, the terminal equipment sends N pieces of feedback information according to a second type PUCCH resource, wherein the second type PUCCH resource is used for carrying out feedback of a second feedback mode on the PDSCH sent by the network equipment, the second feedback mode is that ACK is fed back when the PDSCH sent by the network equipment is correctly received, and NACK is fed back when the PDSCH sent by the network equipment is not correctly received.

Optionally, if N is equal to the threshold, the terminal device may send N feedback information using the PUCCH resource of the first type, and may also send N feedback information using the PUCCH resource of the second type, which is not limited in this application.

Correspondingly, feeding back N feedback information corresponding to the N PDSCHs in a first time unit, and if N is smaller than a threshold value, receiving the N feedback information by the network equipment according to corresponding first type PUCCH resources; if N is greater than the threshold, the network device receives N pieces of feedback information according to the corresponding second type PUCCH resource, and if N is equal to the threshold, the terminal device may receive N pieces of feedback information on the corresponding first type PUCCH resource or receive N pieces of feedback information on the corresponding second type PUCCH resource.

It should be understood that S320 only determines the time unit for sending N feedback information, and the first type PUCCH resource in S330 may be understood as that the time domain resource and the frequency domain resource for sending N feedback information are further determined in this step, so that the terminal device sends N feedback information on the time frequency resource determined by both S320 and S330.

It should be understood that, in the present application, the first feedback mode may be referred to as a NACK-only feedback mode, and the second feedback mode may also be referred to as an ACK/NACK feedback mode, or an a/N feedback mode, which is not specifically limited in the present application.

Similarly, in the present application, the first type PUCCH resource may also be referred to as NACK-only PUCCH resource, and the second type PUCCH resource may also be referred to as ACK/NACK PUCCH resource or a/N PUCCH resource, which is not specifically limited in this application.

Optionally, the first type PUCCH resource carries NACK information and does not carry ACK information, and the second type PUCCH resource carries NACK information and/or ACK information.

Optionally, a PUCCH format (format) of the first type PUCCH resource is format0 or format1.

Optionally, the priorities of the N feedback information corresponding to the N multicast PDSCHs may be the same or different. The priority may be RRC configured or indicated by DCI corresponding to the PDSCH. For example, if the values of the "priority indicator" bit fields in the DCI corresponding to the multiple PDSCHs are the same, the priorities of the feedback information of the N PDSCHs are the same; if the values indicated by the priority indicators in the DCI corresponding to the multiple PDSCHs are different, the priorities of the feedback information of the multiple PDSCHs are different.

The following specifically describes that the first type PUCCH resource and the second type PUCCH resource are located in the same PUCCH configuration information, and are located in different PUCCH configuration information. For convenience of description, in the following embodiments of the present application, when N is equal to the threshold, the terminal device uses the first type PUCCH resource to transmit N pieces of feedback information as an example.

The first method is as follows: and the PUCCH configuration information is located in different PUCCH configuration information, specifically, the first type PUCCH resource is located in the first PUCCH configuration information, and the second type PUCCH resource is located in the second PUCCH configuration information.

Then, in S330:

if N is less than or equal to the threshold, the feedback modes of the N PDSCHs are unchanged, that is, the feedback modes are still the first feedback modes, the terminal device determines a first type PUCCH resource in the first PUCCH configuration information, and then the terminal device sends the N feedback information on the first type PUCCH resource determined in the first time unit;

and if the N is greater than the threshold, changing the feedback modes of the N PDSCHs from the first feedback mode to the second feedback mode, determining a second type PUCCH resource in the second PUCCH configuration information by the terminal equipment, and then sending the N feedback information on the second type PUCCH resource determined in the first time unit by the terminal equipment.

Optionally, the first PUCCH configuration information is used for the first feedback mode, and the second PUCCH configuration information is used for the second feedback mode. For example, the first PUCCH configuration information is multicast PUCCH configuration information corresponding to the first feedback scheme, the second PUCCH configuration information is multicast PUCCH configuration information corresponding to the second feedback scheme, or the second PUCCH configuration information is unicast PUCCH configuration information corresponding to the second feedback scheme.

It should be understood that, in the present application, the multicast PUCCH configuration information corresponding to the first feedback scheme may be referred to as multicast NACK-only PUCCH configuration information, the multicast PUCCH configuration information corresponding to the second feedback scheme may also be referred to as multicast a/N PUCCH configuration information, and the unicast PUCCH configuration information corresponding to the second feedback scheme may also be referred to as unicast a/N PUCCH configuration information, which is not specifically limited in the present application.

Optionally, the first PUCCH configuration information includes a first PUCCH resource set, where the first PUCCH resource set is used for feeding back feedback information of the dynamically scheduled PDSCH, and the first PUCCH resource set includes at least one first type PUCCH resource. As can be seen from the above, the PUCCH resources with PUCCH format0 or PUCCH format1 are both located in the first PUCCH resource set in the PUCCH configuration information where the PUCCH resource is located, and since the PUCCH format of the first PUCCH resource is format0 or format1, the first PUCCH resource in the first PUCCH configuration information is located in the first PUCCH resource set, that is, located in the same PUCCH resource set for feeding back the feedback information of the dynamically scheduled PDSCH, so that the network device only needs to configure one first PUCCH resource set in the first PUCCH configuration information.

For example, when the PDSCHs received by the terminal device are all dynamically scheduled and fed back in the same time unit, the terminal device may determine PUCCH resources in the PUCCH resource set for dynamically scheduling the feedback information of the PDSCHs, so as to carry the feedback information of the dynamically scheduled PDSCHs; when the dynamically scheduled PDSCH and the semi-statically scheduled PDSCH are received and fed back in the same time unit, the UE may determine PUCCH resources in the PUCCH resource set for dynamic scheduling, so as to carry feedback information of the dynamically scheduled PDSCH and feedback information of the dynamically scheduled and semi-statically scheduled PDSCH.

Optionally, the first PUCCH configuration information may further include a PUCCH resource set corresponding to semi-persistent scheduling, where a first PUCCH resource in the PUCCH resource set is a first type PUCCH resource, or a PUCCH resource corresponding to a first PUCCH resource index included in the PUCCH resource set is a first type PUCCH resource. For example, when the received PDSCHs are all semi-statically scheduled and fed back in the same time unit, the UE may determine PUCCH resources in the PUCCH resource set for semi-statically scheduling, so as to carry feedback information of the dynamically scheduled PDSCHs.

The second method comprises the following steps: and locating in the same PUCCH configuration information, specifically, both the first type PUCCH resource and the second type PUCCH resource are located in the third PUCCH configuration information.

Then, in S330:

if N is less than or equal to the threshold, the feedback modes of the N PDSCHs are unchanged, that is, the feedback modes are still the first feedback mode, the terminal device determines a first type PUCCH resource in the third PUCCH configuration information, and then the terminal device sends the N feedback information on the first type PUCCH resource determined in the first time unit;

if N is larger than the threshold, the feedback modes of the N PDSCHs are changed from the first feedback mode to the second feedback mode, the terminal equipment determines one second type PUCCH resource in the third PUCCH configuration information, and then the terminal equipment sends the N feedback information on the second type PUCCH resource determined in the first time unit.

For example, the third PUCCH configuration information may be any one of multicast NACK-only PUCCH configuration information, multicast a/NPUCCH configuration information, and unicast a/N PUCCH configuration information.

Optionally, when the third PUCCH configuration information is multicast NACK-only PUCCH configuration information, the third PUCCH configuration information includes a plurality of PUCCH resource sets, where a first type PUCCH resource is included in a first resource set of the plurality of PUCCH resource sets, and a second type PUCCH resource is included in other resource sets except the first resource set.

Optionally, when the third PUCCH configuration information is multicast a/N PUCCH configuration information or unicast a/N PUCCH configuration information, the third PUCCH configuration information includes a plurality of PUCCH resource sets, where the first type PUCCH resource is included in a first resource set of the plurality of PUCCH resource sets, and the second type PUCCH resource is included in any one set of the plurality of PUCCH resource sets.

It can be seen that the difference between the first mode and the second mode is that the first mode selects the PUCCH resource of the corresponding type from different PUCCH configuration information for HARQ feedback of the PDSCH according to the size relationship between the feedback number and the threshold, and the second mode selects the PUCCH resource of the corresponding type from the same PUCCH configuration information for HARQ feedback of the PDSCH according to the size relationship between the feedback number and the threshold, which makes it clear how the terminal device receiving the multicast service transmits the feedback information of different numbers corresponding to the multicast service according to the multicast PUCCH configuration configured by the network device.

The following exemplifies a corresponding information feedback method with a threshold value of 1 and a threshold value of 2.

For convenience of understanding, in the following example, a terminal device is taken as a UE, and a time unit is taken as a slot (slot), and meanwhile, the network device configures first PUCCH configuration information and second PUCCH configuration information for the UE.

(1) Threshold value of 1

First case

As shown in fig. 4, the UE receives a multicast PDSCH #1 in slot1 (i.e., N = 1), the feedback mode of the PDSCH #1 is a NACK-only feedback mode, that is, the PDSCH #1 is correctly received, and the UE does not feed back ACK information; PDSCH #1 is received incorrectly and the UE feeds back NACK information. The feedback information of PDSCH #1 is fed back in slot3, and the method for determining the feedback slot of PDSCH #1 is described above and is not repeated here.

As can be seen from fig. 4, since the UE only needs to feed back the PDSCH #1 in slot3, that is, the number of feedback information in slot3 does not exceed the threshold 1, the UE determines a NACK-only PUCCH resource (i.e., the first type PUCCH resource) in the first PUCCH configuration information to send the feedback information of PDSCH #1, and the determination of the PUCCH resource refers to the above description, which is not repeated herein.

For example, the NACK-only PUCCH resource determined by the UE in the first PUCCH configuration information is PUCCH resource #1, pdsch #1 is not received correctly, and the UE transmits NACK information on PUCCH resource #1 in slot 3.

Optionally, the PUCCH format of PUCCH resource #1 is format0, and includes only a sequence carrying one NACK message.

Optionally, the PUCCH format of PUCCH resource #1 is format1, and includes only a modulation symbol carrying one NACK information.

It should be understood that the PUCCH resource #1 is group-shared, that is, a plurality of UEs receiving the PDSCH #1 can transmit feedback information of the PDSCH #1 on the PUCCH resource #1, which can save overhead of uplink resources.

It should be noted that, when the UE correctly receives PDSCH #1 in slot1, the UE does not need to feed back ACK information, and therefore, the UE does not transmit ACK information on PUCCH resource #1 in slot3, or the UE does not need to determine PUCCH resource #1.

Second case

As shown in fig. 5, the UE receives multicast PDSCH #1 and multicast PDSCH #2 (i.e., N = 2) in slot1 and slot2, respectively, and the feedback methods of PDSCH #1 and PDSCH #2 are both NACK-only methods. Feedback information of both PDSCH #1 and PDSCH #2 needs to be fed back in slot 3.

As can be seen from fig. 5, since the UE needs to feed back the PDSCH #1 and the PDSCH #2 in slot3, that is, the number of feedback information in slot3 exceeds the threshold 1, at this time, the feedback mode of the PDSCH #1 and the PDSCH #2 is changed from the NACK-only feedback mode to the ACK/NACK feedback mode, and then the UE determines an a/N PUCCH resource (that is, a second type PUCCH resource) in the second PUCCH configuration information to transmit the feedback information of the PDSCH #1 and the PDSCH # 2.

Illustratively, PDSCH #1 is received correctly, PDSCH #2 is received incorrectly, and the a/N PUCCH resource determined by the UE in the second PUCCH configuration information is PUCCH resource #2, then the UE transmits feedback information { ACK, NACK } on PUCCH resource #2 in slot3, where ACK indicates that PDSCH #1 of slot1 is received correctly and NACK indicates that PDSCH #2 of slot2 is received incorrectly.

(2) Threshold value of 2

First case

As shown in fig. 6, the UE receives multicast PDSCH #1 and multicast PDSCH #2 in slot1 and slot2, respectively (i.e., N = 2), and the feedback methods for PDSCH #1 and PDSCH #2 are both NACK-only methods. Feedback information of PDSCH #1 and PDSCH #2 is fed back in slot 3.

As can be seen from fig. 6, the UE needs to feed back PDSCH #1 and PDSCH #2 in slot3, that is, the number of feedback information in slot3 does not exceed threshold 2, and then the UE determines a NACK-only PUCCH resource (i.e., first type PUCCH resource) in the first PUCCH configuration information to transmit the feedback information of PDSCH #1 and PDSCH # 2.

Illustratively, PDSCH #1 is received correctly, PDSCH #2 is received incorrectly, the UE determines in the first PUCCH configuration information that the NACK-only PUCCH resource is PUCCH resource #3, and the UE transmits feedback information { ACK, NACK } in slot3 and on PUCCH resource #3, where ACK indicates that PDSCH #1 of slot1 is received correctly and NACK indicates PDSCH #2 of slot2 is received incorrectly.

It should be noted that, here, the NACK-only feedback manner may be understood as: at least one PDSCH in the PDSCH #1 and the PDSCH #2 is received incorrectly, the UE needs to feed back feedback information corresponding to the two PDSCHs, that is, at least one feedback information in the two feedback information is NACK information, and the UE does not feed back the feedback information only when the PDSCH #1 and the PDSCH #2 are both received correctly.

Optionally, the PUCCH format of PUCCH resource #3 is format0, and format0 includes different sequences, such as sequence 0 corresponding to { NACK, NACK }, sequence 1 corresponding to { NACK, ACK }, sequence 2 corresponding to { ACK, NACK }, sequence 3 corresponding to { ACK, ACK } or no sequence 3. The UE may select sequence transmission corresponding to the reception states of PDSCH #1 and PDSCH #2, for example: when the PDSCH #1 is received correctly and the PDSCH #2 is received incorrectly, the UE selects sequence 2 for transmission.

Alternatively, PUCCH resource #3 is group-shared, that is, a plurality of UEs receiving PDSCH #1 or PDSCH #2 may all transmit feedback information of the received PDSCH on PUCCH resource # 3.

Second case

As shown in fig. 7, the UE receives multicast PDSCH #1 in slot1 and multicast PDSCH #2 and multicast PDSCH #3 (i.e., N = 3) in slot2, and the feedback methods of PDSCH #1, PDSCH #2, and PDSCH #3 are all NACK-only methods. Feedback information of PDSCH #1, PDSCH #2, and PDSCH #3 is fed back in slot 3.

As can be seen from fig. 7, the UE needs to feed back 3 PDSCHs in slot3, that is, the number 3 of feedback information in slot3 exceeds the preset value 2, and at this time, the feedback of NACK-only for 3 PDSCHs is changed into the feedback of ACK/NACK, so that the UE determines one a/N PUCCH resource in the second PUCCH configuration information to send feedback information corresponding to 3 PDSCHs.

Illustratively, the PDSCH #1 is received correctly, the PDSCH #2 and PDSCH #3 are received incorrectly, the a/N PUCCH resource determined by the UE in the second PUCCH configuration information is PUCCH resource #4, and the UE transmits feedback information { ACK, NACK } on PUCCH resource #4 in slot3, where ACK indicates that PDSCH #1 is received correctly, the first NACK indicates that PDSCH #2 is received incorrectly, and the second NACK indicates that PDSCH #3 is received incorrectly.

In the above technical solution, different types of PUCCH resources are selected from different PUCCH configuration information according to a size relationship between the number of feedback information in the feedback time unit and a preset value. The scheme can more reasonably distribute uplink transmission resources according to the number of the feedback information, and improve the transmission efficiency. The reason is as follows, when the number of feedback information is small, the UE may feed back on the first type PUCCH resource in the first feedback manner. The first type PUCCH resource is shared by multiple UEs, that is, the network device detects that there is feedback on this resource, and then the base station reschedules the corresponding multicast PDSCH to these UEs. Because retransmission scheduling of data may be multicast and/or broadcast, it is not necessary to distinguish which UE erroneously received the multicast PDSCH, and the first type PUCCH resource may be used to save occupation of uplink resources; when the number of the feedback information is more, the UE may feed back on the PUCCH resource of the second type according to the second feedback manner. The second type PUCCH resources are different for each UE, and the network equipment can distinguish and determine the UE needing retransmission through the second type PUCCH resources of each UE, and the mode can independently retransmit the UE needing retransmission when the multicast data is more or more important, so that the expense of retransmission scheduling is saved, and the transmission efficiency is improved.

The information feedback method corresponding to the second method is exemplified by the threshold value of 1 and the threshold value of 2.

For convenience of understanding, in the following example, a terminal device is taken as a UE, and a time unit is taken as a slot (slot) as an example, and meanwhile, the network device configures third configuration PUCCH information for multicast PDSCH feedback for the UE.

(1) Threshold value of 1

First case

As shown in fig. 8, the UE receives a multicast PDSCH #1 in slot1 (i.e., N = 1), the feedback mode of PDSCH #1 is NACK-only mode, that is, the multicast PDSCH #1 is received correctly, and the UE does not feed back ACK information; the multicast PDSCH #1 is received incorrectly and the UE feeds back NACK information. The feedback information of PDSCH #1 is fed back in slot3, and the method for determining the feedback slot of PDSCH #1 is described above and is not repeated here.

As can be seen from fig. 8, since the UE only needs to feed back the PDSCH #1 in slot3, that is, the number of feedback information in slot3 does not exceed the threshold 1, the UE determines a NACK-only PUCCH resource (i.e., the first type PUCCH resource) in the third PUCCH configuration information to send the feedback information of PDSCH #1, and the selection method of the PUCCH resource refers to the above description, which is not described herein again.

For example, the NACK-only PUCCH resource determined by the UE in the third PUCCH configuration information is PUCCH resource #1, pdsch #1 is not received correctly, and the UE feeds back NACK information on PUCCH resource #1 in slot 3.

Optionally, the PUCCH format of PUCCH resource #1 is format0, and includes only a sequence carrying one NACK information.

Alternatively, the PUCCH resource #1 is group-shared, that is, a plurality of UEs receiving the PDSCH #1 may all transmit feedback information of the PDSCH #1 on the PUCCH resource #1.

It should be noted that, when the multicast PDSCH in slot1 is correctly received, the UE does not feed back ACK information, so the UE does not transmit ACK information on PUCCH resource #1 in slot3, or the UE does not need to determine PUCCH resource #1 in slot # 3.

Second case

As shown in fig. 9, the UE receives multicast PDSCH #1 and multicast PDSCH #2 (i.e., N = 2) in slot1 and slot2, respectively, and the feedback methods of PDSCH #1 and PDSCH #2 are both NACK-only methods. Feedback information of both PDSCH #1 and PDSCH #2 needs to be fed back in slot 3.

As can be seen from fig. 9, since the UE needs to feed back the PDSCH #1 and the PDSCH #2 in slot3, that is, the number of feedback information in slot3 exceeds the threshold 1, at this time, the feedback mode of the PDSCH #1 and the PDSCH #2 is changed from the NACK-only feedback mode to the ACK/NACK feedback mode, and then the UE determines one a/N PUCCH resource (that is, the second type PUCCH resource) in the third PUCCH configuration information to transmit the feedback information of the PDSCH #1 and the PDSCH # 2.

Illustratively, PDSCH #1 is received correctly, PDSCH #2 is received incorrectly, the a/N PUCCH resource determined by the UE in the third PUCCH configuration information is PUCCH resource #2, and the UE transmits feedback information { ACK, NACK } on PUCCH resource #2 in slot3, where ACK indicates that PDSCH #1 of slot1 is received correctly and NACK indicates that PDSCH #2 of slot2 is received incorrectly.

(2) Preset value of 2

First case

As shown in fig. 10, the UE receives multicast PDSCH #1 and multicast PDSCH #2 in slot1 and slot2, respectively (i.e., N = 2), and the feedback methods for PDSCH #1 and PDSCH #2 are both NACK-only methods. Feedback information of PDSCH #1 and PDSCH #2 is fed back in slot 3.

As can be seen from fig. 10, the UE needs to feed back PDSCH #1 and PDSCH #2 in slot3, that is, the number of feedback information in slot3 does not exceed threshold 2, and then the UE determines a NACK-only PUCCH resource (i.e., first type PUCCH resource) in the third PUCCH configuration information to transmit the feedback information of PDSCH #1 and PDSCH # 2.

Illustratively, PDSCH #1 is received correctly, PDSCH #2 is received incorrectly, the NACK-only PUCCH resource determined by the UE in the third PUCCH configuration information is PUCCH resource #3, and the UE transmits feedback information { ACK, NACK } on PUCCH resource #3 in slot3, where ACK indicates that PDSCH #1 of slot1 is received correctly and NACK indicates that PDSCH #2 of slot2 is received incorrectly.

Second case

As shown in fig. 11, the UE receives the multicast PDSCH #1 in slot1, the UE receives the multicast PDSCH #2 and the multicast PDSCH #3 (i.e., N = 3) in slot2, and the feedback modes of the PDSCH #1, the PDSCH #2, and the PDSCH #3 are all NACK-only modes. Feedback information of PDSCH #1, PDSCH #2, and PDSCH #3 is fed back in slot 3.

As can be seen from fig. 11, the UE needs to feed back 3 PDSCHs in slot3, that is, the number 3 of feedback information in slot3 exceeds the preset value 2, and at this time, the feedback of NACK-only for 3 PDSCHs is changed into the feedback of ACK/NACK, so that the UE determines an a/N PUCCH resource in the third PUCCH configuration information to send feedback information corresponding to 3 PDSCHs.

Illustratively, the PDSCH #1 is received correctly, the PDSCH #2 and PDSCH #3 are received incorrectly, the a/N PUCCH resource determined by the UE in the third PUCCH configuration information is PUCCH resource #4, and the UE transmits feedback information { ACK, NACK } on PUCCH resource #4 in slot3, where ACK indicates that PDSCH #1 is received correctly, the first NACK indicates that PDSCH #2 is received incorrectly, and the second NACK indicates that PDSCH #3 is received incorrectly.

According to the technical scheme, the uplink transmission resources can be more reasonably distributed according to the number of the feedback information, and the transmission efficiency is improved. For example, when the number of feedback information is small, the UE may feed back on the first type PUCCH resource in a first feedback manner, where the first type PUCCH resource is shared by multiple UEs, that is, the network device detects that there is feedback on the resource, and then the network device may reschedule the corresponding multicast PDSCH to the UEs, and since the retransmission scheduling of data may be multicast and/or broadcast, it is not necessary to distinguish which UE has received the multicast PDSCH by mistake, and the first type PUCCH resource may save the occupation of uplink resources; when the number of the feedback information is more, the UE can feed back on the PUCCH resources of the second type according to a second feedback mode, the PUCCH resources of the second type are different from one another, the network equipment can distinguish and determine the UE which needs to be retransmitted through the feedback of each UE on the PUCCH resources of the second type, and the mode can independently retransmit the UE which needs to be retransmitted when the multicast data is more or more important, so that the expense of retransmission scheduling is saved, and the efficiency of the system is improved.

It should be understood that the UE receives N PDSCHs and feeds back N feedback information, where all N feedback information may be fed back on a certain PUCCH resource, M feedback information of the N feedback information may be fed back on a certain PUCCH resource, M is less than or equal to N, or 0 feedback information may be fed back on a certain PUCCH resource, that is, no feedback information is fed back. For example, when the UE receives a multicast PDSCH (N = 1), the threshold is 1, and the feedback information of the received PDSCH is NACK information, the UE feeds back 1 NACK information on the determined PUCCH resource; if the feedback information of the received PDSCH is ACK information, the UE does not feed back the ACK information on the determined PUCCH resource or does not determine the PUCCH resource for transmitting the feedback information.

Finally, it should be noted that, when the network device does not configure NACK-only PUCCH configuration information, but configures NACK-only feedback, even if the number of feedback information that needs to be fed back in a feedback time unit is smaller than a threshold, the NACK-only feedback is changed to a/N feedback, that is, the feedback information is transmitted by using an a/N PUCCH resource in the a/N PUCCH configuration information.

The communication method provided by the present application is explained in detail above, and the communication apparatus provided by the present application is described below.

Referring to fig. 12, fig. 12 is a schematic block diagram of a communication device 1000 provided herein.

In one possible design, communications device 1000 may include a receiving unit 1100, a processing unit 1200, and a transmitting unit 1300. The communication apparatus 1000 may implement the steps or processes executed by the terminal device corresponding to the above method embodiments, for example, the communication apparatus 1000 may be the terminal device, or may also be a chip or a circuit configured in the terminal device. The receiving unit 1100 is configured to perform receiving related operations of the terminal device in the foregoing method embodiment, the processing unit 1200 is configured to perform processing related operations of the terminal device in the foregoing method embodiment, and the transmitting unit is configured to perform transmitting related operations of the terminal device in the foregoing method embodiment.

A possible implementation manner, the receiving unit 1100 is configured to receive N PDSCHs sent by a network device in a multicast manner, where a feedback manner of the N PDSCHs is a first feedback manner, where the first feedback manner is to not feed back an acknowledgement ACK when the PDSCHs sent by the network device are correctly received, or to feed back a negative acknowledgement NACK when the PDSCHs sent by the network device are not correctly received, and N is a positive integer; a processing unit 1200, configured to determine that N pieces of feedback information corresponding to the N PDSCHs are fed back in a first time unit; a sending unit 1300, configured to send the N pieces of feedback information according to a first type physical uplink control channel, PUCCH, resource if N is less than or equal to a threshold, where the first type PUCCH resource is used to perform feedback of the first feedback manner on the PDSCH sent by the network device; or if N is greater than the threshold, the sending unit is configured to send the N pieces of feedback information according to a second type PUCCH resource, where the second type PUCCH resource is used to perform feedback of a second feedback manner on the PDSCH sent by the network device, the second feedback manner is to feed back ACK when the PDSCH sent by the network device is correctly received and to feed back NACK when the PDSCH sent by the network device is not correctly received, and the first type PUCCH resource and the second type PUCCH resource are located in the same PUCCH configuration information or different PUCCH configuration information.

Optionally, the first type PUCCH resource carries NACK information and does not carry ACK information; and the second type PUCCH resource carries NACK information and/or ACK information.

Optionally, the PUCCH format of the first type PUCCH resource is format0 or format1.

Optionally, when the threshold is 1, the sending unit 1300 is specifically configured to send 1 NACK information according to a first type PUCCH resource when N = 1; or, when the threshold is 2, the transmitting unit 1300 is specifically configured to transmit 1 NACK information according to a first type PUCCH resource when N = 1; or when N =2, transmitting 2 pieces of feedback information according to the first type PUCCH resource, where the 2 pieces of feedback information include at least one NACK information.

Optionally, the first type PUCCH resource and the second type PUCCH resource are located in different PUCCH configuration information, the first type PUCCH resource is located in first PUCCH configuration information, the second type PUCCH resource is located in second PUCCH configuration information, the first PUCCH configuration information is used for the first feedback mode, and the second PUCCH configuration information is used for the second feedback mode.

Optionally, the first PUCCH configuration information includes a first PUCCH resource set, where the first PUCCH resource set is used for feeding back feedback information of the dynamically scheduled PDSCH, and the first PUCCH resource set includes at least one first type PUCCH resource.

Optionally, the first PUCCH configuration information is multicast PUCCH configuration information corresponding to the first feedback mode; the second PUCCH configuration information is multicast PUCCH configuration information corresponding to the second feedback mode, or the second PUCCH configuration information is unicast PUCCH configuration information corresponding to the second feedback mode.

Optionally, the first type PUCCH resource and the second type PUCCH resource are located in third PUCCH configuration information, where the third PUCCH configuration information is multicast PUCCH configuration information corresponding to the first feedback manner, and the third PUCCH configuration information includes a plurality of PUCCH resource sets, the first type PUCCH resource is included in a first resource set of the PUCCH resource sets, and the second type PUCCH resource is included in other resource sets except the first resource set; or the third PUCCH configuration information is multicast PUCCH configuration information corresponding to the second feedback manner, or the third PUCCH configuration information is unicast PUCCH configuration information corresponding to the second feedback manner, where the third PUCCH configuration information includes a plurality of PUCCH resource sets, the first type PUCCH resource is included in a first resource set of the PUCCH resource sets, and the second type PUCCH resource is included in any one of the PUCCH resource sets.

Alternatively, the transmitting unit 1300 and the receiving unit 1100 may be integrated into a single transceiver unit, and have both receiving and transmitting functions, which is not limited herein.

Optionally, in an implementation manner that the communication apparatus 1000 may be a terminal device in the method embodiment, the sending unit 1300 may be a transmitter, and the receiving unit 1100 may be a receiver. The receiver and the transmitter may also be integrated into one transceiver. The processing unit 1200 may be a processing device.

The functions of the processing device may be implemented by hardware, or may be implemented by hardware executing corresponding software. For example, the processing device may include a memory and a processor, where the memory is used for storing a computer program, and the processor reads and executes the computer program stored in the memory, so that the communication device 1000 performs the operations and/or processes performed by the terminal device in the method embodiments. Alternatively, the processing means may comprise only the processor, the memory for storing the computer program being located outside the processing means. The processor is connected to the memory via the circuitry/wires to read and execute the computer programs stored in the memory. Also for example, the processing device may be a chip or an integrated circuit.

Alternatively, in an implementation that the communication apparatus 1000 may be a chip or an integrated circuit installed in a terminal device, the transmitting unit 1300 and the receiving unit 1100 may be communication interfaces or interface circuits, for example, the transmitting unit 1300 is an output interface or an output circuit, and the receiving unit 1100 is an input interface or an input circuit. The processing unit 1200 may be a processor or microprocessor integrated on the chip or integrated circuit. And is not limited thereto.

In another possible design, communications apparatus 1000 includes a transmitting unit 1300 and a receiving unit 1100. The communication apparatus 1000 may implement the steps or processes executed by the network device corresponding to the above method embodiments, for example, the communication apparatus 1000 may be a network device, or may also be a chip or a circuit configured in a network device. The sending unit 1300 is configured to perform the receiving related operation of the network device in the foregoing method embodiment, and the receiving unit 1100 is configured to perform the receiving related operation of the network device in the foregoing method embodiment.

A sending unit 1300, configured to send N PDSCHs to a terminal device in a multicast manner, where a feedback manner of the N PDSCHs is a first feedback manner, where the first feedback manner is to not feed back an ACK when a PDSCH sent by a network device is correctly received or to feed back a NACK when a PDSCH sent by the network device is not correctly received, where N is a positive integer, and N feedback information corresponding to the N PDSCHs is fed back in a first time unit; a receiving unit 1100, configured to receive the N pieces of feedback information according to a first type of physical uplink control channel, PUCCH, resource when N is less than or equal to a threshold, where the first type of PUCCH resource is used to perform feedback of the first feedback manner on a PDSCH sent by the network device; or, the receiving unit 1100 is configured to receive, when N is greater than the threshold, the N pieces of feedback information according to a second type PUCCH resource, where the second type PUCCH resource is used to perform feedback of a second feedback manner on a PDSCH sent by a network device, and the second feedback manner is to feed back an ACK when the PDSCH sent by the network device is correctly received or feed back a NACK when the PDSCH sent by the network device is not correctly received, where the first type PUCCH resource and the second type PUCCH resource are located in the same PUCCH configuration information or different PUCCH configuration information.

Optionally, when the threshold is 1, the receiving unit 1100 is specifically configured to receive, when N =1, 1 NACK information fed back by the terminal device in the first time unit according to the first type PUCCH resource; or, when the threshold is 2, the receiving unit 1100 is specifically configured to receive, when N =1, 1 NACK information fed back by the terminal device in the first time unit according to the first type PUCCH resource; when N =2, receiving 2 pieces of feedback information fed back by the terminal device in a first time unit according to a first type PUCCH resource, wherein the 2 pieces of feedback information at least comprise one piece of NACK information.

Optionally, the first type PUCCH resource and the second type PUCCH resource are located in third PUCCH configuration information, where the third PUCCH configuration information is multicast PUCCH configuration information corresponding to the first feedback manner, and the third PUCCH configuration information includes a plurality of PUCCH resource sets, the first type PUCCH resource is included in a first resource set of the PUCCH resource sets, and the second type PUCCH resource is included in other resource sets except the first resource set; or the third PUCCH configuration information is multicast PUCCH configuration information corresponding to the second feedback scheme, or the third PUCCH configuration information is unicast PUCCH configuration information corresponding to the second feedback scheme, where the third PUCCH configuration information includes a plurality of PUCCH resource sets, the first type PUCCH resource is included in a first resource set of the PUCCH resource sets, and the second type PUCCH resource is included in any one of the PUCCH resource sets.

Optionally, the communication apparatus 1000 may further include the processing unit 1200, and the transmitting unit 1300 and the receiving unit 1100 may also be integrated into a single transceiver unit, and have functions of receiving and transmitting, which is not limited herein.

Optionally, in an implementation manner that the communication apparatus 1000 may be a network device in the method embodiment, the sending unit 1300 may be a transmitter, and the receiving unit 1100 may be a receiver. The receiver and the transmitter may also be integrated into one transceiver. The processing unit 1200 may be a processing device.

The functions of the processing device may be implemented by hardware, or may be implemented by hardware executing corresponding software. For example, the processing device may include a memory for storing a computer program and a processor that reads and executes the computer program stored in the memory, so that the communication device 1000 performs the operations and/or processes performed by the network device in the method embodiments. Alternatively, the processing means may comprise only the processor, the memory for storing the computer program being located outside the processing means. The processor is connected to the memory through the circuit/wire to read and execute the computer program stored in the memory. Also for example, the processing device may be a chip or an integrated circuit.

Alternatively, in an implementation in which the communication apparatus 1000 may be a chip or an integrated circuit installed in a network device, the transmitting unit 1300 and the receiving unit 1100 may be communication interfaces or interface circuits. For example, the transmitting unit 1300 is an output interface or an output circuit, and the receiving unit 1100 is an input interface or an input circuit. The processing unit 1200 may be a processor or microprocessor integrated on the chip or integrated circuit. And are not limited herein.

Referring to fig. 13, fig. 13 is a schematic structural diagram of the communication device 10 provided in the present application. The apparatus 10 comprises a processor 11, the processor 11 is coupled to a memory 12, the memory 12 is used for storing computer programs or instructions and/or data, the processor 11 is used for executing the computer programs or instructions stored in the memory 12 or reading the data stored in the memory 12 to execute the method in the above method embodiments.

Optionally, the processor 11 is one or more.

Optionally, the memory 12 is one or more.

Alternatively, the memory 12 is integrated with the processor 11, or is provided separately.

Optionally, as shown in fig. 13, the apparatus 10 further comprises a transceiver 13, and the transceiver 13 is used for receiving and/or transmitting signals. For example, the processor 11 is used to control the transceiver 13 to receive and/or transmit signals.

As a solution, the apparatus 10 is used to implement the operations performed by the terminal device in the above method embodiments.

For example, the processor 11 is configured to execute the computer program or instructions stored in the memory 12 to implement the relevant operations executed by the terminal device in the above respective method embodiments. For example, the method performed by the terminal device in the embodiment shown in fig. 3 is implemented.

As another example, processor 11 is configured to execute computer programs or instructions stored by memory 12 to implement the relevant operations performed by the network device in the above method embodiments. For example, the method performed by the network device in the embodiment shown in fig. 3 is implemented.

In addition, the present application also provides a computer-readable storage medium, in which computer instructions are stored, and when the computer instructions are executed on a computer, the operations and/or processes executed by the terminal device or the network device in the method embodiments of the present application are executed.

The present application also provides a computer program product, which includes computer program code or instructions, when the computer program code or instructions runs on a computer, cause the operations and/or processes performed by the terminal device or the network device in the method embodiments of the present application to be performed.

In addition, the present application also provides a chip including a processor. A memory for storing the computer program is provided separately from the chip, and a processor is configured to execute the computer program stored in the memory, so that the operation and/or the process performed by the terminal device or the network device in any one of the method embodiments is performed.

Further, the chip may also include a communication interface. The communication interface may be an input/output interface, an interface circuit, or the like. Further, the chip may further include a memory.

In addition, the present application also provides a communication system, which includes the terminal device and the network device in the embodiment of the present application.

It should be understood that the processor in the embodiments of the present application may be an integrated circuit chip having the capability of processing signals. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The processor may be a Central Processing Unit (CPU), or may be other general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented by a hardware encoding processor, or implemented by a combination of hardware and software modules in the encoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and combines hardware thereof to complete the steps of the method.

The memory in the embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DRRAM).

It should be noted that when the processor is a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, the memory (memory module) may be integrated into the processor.

It should also be noted that the memory described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk or an optical disk, and various media capable of storing program codes.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of communication, comprising:

receiving N PDSCHs (physical downlink shared channels) sent by network equipment in a multicast mode, wherein the feedback mode of the N PDSCHs is a first feedback mode, the first feedback mode is that positive Acknowledgement (ACK) is not fed back when the PDSCHs sent by the network equipment are correctly received, or Negative Acknowledgement (NACK) is fed back when the PDSCHs sent by the network equipment are not correctly received, and N is a positive integer;

determining that N pieces of feedback information corresponding to the N PDSCHs are fed back in a first time unit;

if N is less than or equal to a threshold value, the N pieces of feedback information are sent according to a first type Physical Uplink Control Channel (PUCCH) resource, and the first type PUCCH resource is used for carrying out feedback of the first feedback mode on a PDSCH sent by the network equipment; or the like, or a combination thereof,

and if N is larger than the threshold value, the N pieces of feedback information are sent according to a second type PUCCH resource, the second type PUCCH resource is used for carrying out feedback of a second feedback mode on the PDSCH sent by the network equipment, the second feedback mode is that ACK is fed back when the PDSCH sent by the network equipment is correctly received, and NACK is fed back when the PDSCH sent by the network equipment is not correctly received, wherein the first type PUCCH resource and the second type PUCCH resource are located in the same PUCCH configuration information or different PUCCH configuration information.

2. The method of claim 1, wherein the first type PUCCH resources carry NACK information and do not carry ACK information; and the second type PUCCH resource carries NACK information and/or ACK information.

3. The method according to claim 1 or 2, wherein the PUCCH format of the first type PUCCH resource is format0 or format1.

4. The method according to any one of claims 1 to 3,

when the threshold is 1, the sending the N pieces of feedback information according to the first type PUCCH resource includes:

when N =1, transmitting 1 NACK information according to the first type PUCCH resource;

or,

when the threshold is 2, the sending the N pieces of feedback information according to the first type PUCCH resource includes:

when N =1, transmitting 1 NACK information according to the first type PUCCH resource; or,

when N =2, transmitting 2 pieces of feedback information according to the first type PUCCH resource, where the 2 pieces of feedback information include at least one NACK information.

5. The method according to any of claims 1-4, wherein the first type PUCCH resources and the second type PUCCH resources are located in different PUCCH configuration information, wherein the first type PUCCH resources are located in first PUCCH configuration information, wherein the second type PUCCH resources are located in second PUCCH configuration information, wherein the first PUCCH configuration information is used for the first feedback mode, and wherein the second PUCCH configuration information is used for the second feedback mode.

6. The method of claim 5,

the first PUCCH configuration information comprises a first PUCCH resource set used for feeding back feedback information of a dynamically scheduled PDSCH, and the first PUCCH resource set comprises at least one first type PUCCH resource.

7. The method according to claim 5 or 6, wherein the first PUCCH configuration information is multicast PUCCH configuration information corresponding to the first feedback scheme; the second PUCCH configuration information is multicast PUCCH configuration information corresponding to the second feedback mode, or the second PUCCH configuration information is unicast PUCCH configuration information corresponding to the second feedback mode.

8. The method according to any of claims 1 to 4, wherein the first type PUCCH resources and the second type PUCCH resources are located in third PUCCH configuration information, the third PUCCH configuration information being multicast PUCCH configuration information corresponding to the first feedback scheme, the third PUCCH configuration information comprising a plurality of PUCCH resource sets, the first type PUCCH resources being included in a first resource set of the plurality of PUCCH resource sets, the second type PUCCH resources being included in other resource sets except the first resource set;

or,

the third PUCCH configuration information is multicast PUCCH configuration information corresponding to the second feedback mode, or the third PUCCH configuration information is unicast PUCCH configuration information corresponding to the second feedback mode, where the third PUCCH configuration information includes a plurality of PUCCH resource sets, the first type PUCCH resource is included in a first resource set of the PUCCH resource sets, and the second type PUCCH resource is included in any one of the PUCCH resource sets.

9. A method of communication, comprising:

sending N PDSCHs (physical downlink shared channels) to terminal equipment in a multicast mode, wherein the feedback mode of the N PDSCHs is a first feedback mode, the first feedback mode is that an Acknowledgement (ACK) is not fed back when the PDSCHs sent by the network equipment are correctly received, or a Negative Acknowledgement (NACK) is fed back when the PDSCHs sent by the network equipment are not correctly received, N is a positive integer, and N feedback information corresponding to the N PDSCHs is fed back in a first time unit;

if N is less than or equal to a threshold value, receiving the N pieces of feedback information according to a first type Physical Uplink Control Channel (PUCCH) resource, wherein the first type PUCCH resource is used for performing feedback of the first feedback mode on a PDSCH (physical downlink shared channel) sent by the network equipment; or,

if N is larger than the threshold, receiving the N pieces of feedback information according to a second type PUCCH resource, wherein the second type PUCCH resource is used for carrying out feedback of a second feedback mode on a PDSCH sent by the network equipment, and the second feedback mode is that ACK is fed back when the PDSCH sent by the network equipment is correctly received or NACK is fed back when the PDSCH sent by the network equipment is not correctly received,

wherein the first type PUCCH resource and the second type PUCCH resource are located in the same PUCCH configuration information or in different PUCCH configuration information.

10. The method of claim 9, wherein the first type PUCCH resources carry NACK information and not ACK information; and the second type PUCCH resource carries NACK information and/or ACK information.

11. The method according to claim 9 or 10, wherein a PUCCH format of the first type PUCCH resource is format0 or format1.

12. The method according to any one of claims 9 to 11,

when the threshold is 1, the receiving N feedback information corresponding to the N PDSCHs fed back by the terminal device in a first time unit according to a first type PUCCH resource includes:

when N =1, receiving 1 NACK information fed back by the terminal equipment in the first time unit according to the first type PUCCH resource;

or,

when the threshold is 2, the receiving N pieces of feedback information corresponding to the N PDSCHs fed back by the terminal device in a first time unit according to a first type PUCCH resource includes:

when N =1, receiving 1 NACK information fed back by the terminal equipment in the first time unit according to the first type PUCCH resource; or,

when N =2, receiving 2 pieces of feedback information fed back by the terminal device in a first time unit according to a first type PUCCH resource, where the 2 pieces of feedback information include at least one NACK information.

13. The method according to any of claims 9-12, wherein the first type PUCCH resources and the second type PUCCH resources are located in different PUCCH configuration information, wherein the first type PUCCH resources are located in first PUCCH configuration information, wherein the second type PUCCH resources are located in second PUCCH configuration information, wherein the first PUCCH configuration information is used for the first feedback mode, and wherein the second PUCCH configuration information is used for the second feedback mode.

14. The method of claim 13,

15. The method according to claim 13 or 14, wherein the first PUCCH configuration information is multicast PUCCH configuration information corresponding to the first feedback scheme; the second PUCCH configuration information is multicast PUCCH configuration information corresponding to the second feedback mode, or the second PUCCH configuration information is unicast PUCCH configuration information corresponding to the second feedback mode.

16. The method according to any of claims 9 to 12, wherein the first type PUCCH resources and the second type PUCCH resources are located in third PUCCH configuration information, the third PUCCH configuration information is multicast PUCCH configuration information corresponding to the first feedback mode, the third PUCCH configuration information includes a plurality of PUCCH resource sets, the first type PUCCH resources are included in a first one of the PUCCH resource sets, and the second type PUCCH resources are included in other resource sets except the first one;

or,

17. A communications apparatus, comprising:

a receiving unit, configured to receive N PDSCHs sent by a network device in a multicast manner, where a feedback manner of the N PDSCHs is a first feedback manner, where the first feedback manner is to not feed back an ACK when a PDSCH sent by the network device is correctly received or to feed back a NACK when a PDSCH sent by the network device is not correctly received, and N is a positive integer;

a processing unit, configured to determine that N pieces of feedback information corresponding to the N PDSCHs are fed back in a first time unit;

a sending unit, configured to send the N pieces of feedback information according to a first type of Physical Uplink Control Channel (PUCCH) resource if N is less than or equal to a threshold, where the first type of PUCCH resource is used to perform feedback of the first feedback manner on a PDSCH sent by the network device; or,

if N is greater than the threshold, the sending unit is configured to send the N pieces of feedback information according to a second type PUCCH resource, where the second type PUCCH resource is used to perform feedback in a second feedback manner on the PDSCH sent by the network device, the second feedback manner is to feed back ACK when the PDSCH sent by the network device is correctly received and to feed back NACK when the PDSCH sent by the network device is not correctly received, and the first type PUCCH resource and the second type PUCCH resource are located in the same PUCCH configuration information or different PUCCH configuration information.

18. The communications apparatus of claim 17, wherein the first type PUCCH resources carry NACK information and not ACK information; and the second type PUCCH resource carries NACK information and/or ACK information.

19. The apparatus according to claim 17 or 18, wherein a PUCCH format of the first type PUCCH resource is format0 or format1.

20. The communication device according to any one of claims 17 to 19,

when the threshold is 1, the sending unit is specifically configured to,

or,

when the threshold is 2, the sending unit is specifically configured to,

21. A communication device according to any of claims 17 to 20, wherein the first type PUCCH resources and the second type PUCCH resources are located in different PUCCH configuration information, wherein the first type PUCCH resources are located in first PUCCH configuration information, wherein the second type PUCCH resources are located in second PUCCH configuration information, wherein the first PUCCH configuration information is used for the first feedback scheme, and wherein the second PUCCH configuration information is used for the second feedback scheme.

22. The communication device of claim 21,

23. The communication apparatus according to claim 21 or 22, wherein the first PUCCH configuration information is multicast PUCCH configuration information corresponding to the first feedback scheme; the second PUCCH configuration information is multicast PUCCH configuration information corresponding to the second feedback mode, or the second PUCCH configuration information is unicast PUCCH configuration information corresponding to the second feedback mode.

24. A communication device according to any of claims 17-20, wherein the first type PUCCH resources and the second type PUCCH resources are located in third PUCCH configuration information,

the third PUCCH configuration information is multicast PUCCH configuration information corresponding to the first feedback mode, and the third PUCCH configuration information includes a plurality of PUCCH resource sets, where the first type PUCCH resource is included in a first resource set of the PUCCH resource sets, and the second type PUCCH resource is included in a resource set other than the first resource set;

or,

25. A communications apparatus, comprising:

a sending unit, configured to send N PDSCHs to a terminal device in a multicast manner, where a feedback manner of the N PDSCHs is a first feedback manner, where the first feedback manner is to not feed back an ACK when a PDSCH sent by a network device is correctly received or to feed back a NACK when the PDSCH sent by the network device is not correctly received, where N is a positive integer, and N feedback information corresponding to the N PDSCHs is fed back in a first time unit;

a receiving unit, configured to receive the N pieces of feedback information according to a first type Physical Uplink Control Channel (PUCCH) resource when N is less than or equal to a threshold, where the first type PUCCH resource is used to perform feedback of the first feedback manner on a PDSCH sent by the network device; or,

the receiving unit is configured to receive the N pieces of feedback information according to a second type PUCCH resource when N is greater than the threshold, where the second type PUCCH resource is used to perform feedback of a second feedback manner on the PDSCH sent by the network device, and the second feedback manner is to feed back ACK when the PDSCH sent by the network device is correctly received or to feed back NACK when the PDSCH sent by the network device is not correctly received,

26. The communications apparatus of claim 25, wherein the first type PUCCH resources carry NACK information and not ACK information; and the second type PUCCH resource carries NACK information and/or ACK information.

27. The apparatus according to claim 25 or 26, wherein the PUCCH format for the first type of PUCCH resource is format0 or format1.

28. The communication device according to any of claims 25 to 27,

when the threshold is 1, the receiving unit is specifically configured to,

or,

when the threshold is 2, the receiving unit is specifically configured to,

29. A communication apparatus according to any of claims 25 to 28, wherein the first type PUCCH resources and the second type PUCCH resources are located in different PUCCH configuration information, wherein the first type PUCCH resources are located in first PUCCH configuration information and the second type PUCCH resources are located in second PUCCH configuration information, wherein the first PUCCH configuration information is used for the first feedback mode and the second PUCCH configuration information is used for the second feedback mode.

30. The communication device of claim 29,

the first PUCCH configuration information comprises a first PUCCH resource set, the first PUCCH resource set is used for feeding back feedback information of a dynamically scheduled PDSCH, and the first PUCCH resource set comprises at least one first type PUCCH resource.

31. The communications apparatus according to claim 29 or 30, wherein the first PUCCH configuration information is multicast PUCCH configuration information corresponding to the first feedback scheme; the second PUCCH configuration information is multicast PUCCH configuration information corresponding to the second feedback mode, or the second PUCCH configuration information is unicast PUCCH configuration information corresponding to the second feedback mode.

32. A communication device according to any of claims 25-28, wherein the first type PUCCH resources and the second type PUCCH resources are located in third PUCCH configuration information,

the third PUCCH configuration information is multicast PUCCH configuration information corresponding to the first feedback mode, where the third PUCCH configuration information includes a plurality of PUCCH resource sets, the first type PUCCH resource is included in a first resource set of the PUCCH resource sets, and the second type PUCCH resource is included in a resource set other than the first resource set;

or,

33. A communications apparatus, comprising at least one processor coupled with at least one memory, the at least one processor to execute a computer program or instructions stored in the at least one memory to cause the communications apparatus to perform the method of any of claims 1-16.

34. A computer-readable storage medium having stored thereon computer instructions for performing the method of any one of claims 1 to 16 when the computer instructions are run on a computer.

35. A computer program product comprising computer program code means for performing a method according to any one of claims 1 to 16 when said computer program code means is run on a computer.