A communication method and apparatus

Abstract

The present application provides a communication method and apparatus, which are used to improve the flexibility of indicating frequency-domain resources for multicast transmission. In the present application, a network device can schedule data channels in multicast transmission through first information. Among them, the first information indicates the frequency-domain resources of the data channels within the range of a first frequency-domain resource, and the first frequency-domain resource is independently configured with respect to a second frequency-domain resource. The second frequency-domain resource includes CORESET0 and an initial BWP. The first frequency-domain resource associated with the first information is no longer associated with the CORESET0 and / or the initial BWP configured by the network device, that is, the size of the first frequency-domain resource is not limited to CORESET0 or the initial BWP, and can be flexibly configured. Or rather, the first frequency-domain resource can be independent of CORESET0 and / or the initial BWP. Therefore, the flexibility of indicating frequency-domain resources for multicast transmission is improved.

Description

Technical Field

[0001] This application relates to the field of communications, and in particular, to a communication method and apparatus. Background Art

[0002] In current mobile communication technologies, the physical downlink control channel (PDCCH) can be used to carry downlink control information (DCI). DCI format 1_0 and DCI format 1_1 can be used to schedule data. For example, the frequency-domain resources of a data channel are indicated by DCI. Among them, the data channel is, for example, the physical downlink shared channel (PDSCH).

[0003] Currently, the length of the frequency-domain resource allocation field of DCI format 1_0 can only be associated with control resource set (CORESET) 0 or the initial bandwidth part (BWP), resulting in limited frequency-domain resources that can be indicated. Therefore, the flexibility of the frequency-domain resource indication for multicast transmission needs to be improved. Summary of the Invention

[0004] This application provides a communication method and apparatus to improve the flexibility of the frequency-domain resource indication for multicast transmission.

[0005] In a first aspect, this application provides a communication method. This method can be executed by a terminal device or a chip in the terminal device.

[0006] According to this method, the terminal device obtains a first frequency-domain resource and a second frequency-domain resource. The terminal device receives first information, and the first information is a group-radio network temporary identifier (G-RNTI). Among them, the first information indicates the frequency-domain resources of a data channel within the range of the first frequency-domain resource. The first frequency-domain resource is configured independently of the second frequency-domain resource, and the second frequency-domain resource includes control resource set (CORESET) 0 and the initial bandwidth part (BWP).

[0007] Using the above method, the scheduling of the multicast or broadcast data channel can be performed through the first information. Among them, the first frequency-domain resource associated with the first information is no longer associated with the CORESET0 and / or the initial BWP configured by the network device. That is, the size of the first frequency-domain resource is not limited to CORESET0 or the initial BWP, and it can be flexibly configured. Here, the size of the first frequency-domain resource is not limited to CORESET0 or the initial BWP, which can also mean that the configured first frequency-domain resource can be independent of CORESET0 and / or the initial BWP. Therefore, the flexibility of the frequency-domain resource indication for multicast transmission is improved.

[0008] In a possible example, the above first information does not include the information fields of at least one of the new data indication, redundancy version, hybrid automatic repeat request (HARQ) process number, downlink allocation index, physical uplink control channel (PUCCH) transmission power control command, PUCCH resource indication, or PDSCH to HARQ feedback timing indication. In addition, the first information may not include DCI format identification information, or rather, the first information does not include the DCI format identification information field, and the DCI format identification information is used to indicate the uplink or downlink DCI format. Among them, the information field of the new data indication can also be referred to as the new data indication information field in this application, and the information fields of other information are the same. Thus, the bit positions of the above information fields in the first information can be used as the bit positions in other information fields, for example, to indicate the frequency-domain resources of the downlink data channel or to indicate other information, so as to further improve the scheduling flexibility.

[0009] Exemplarily, the terminal device may also receive second information, which is DCI format 1_0 and scrambled by a cell-radio network temporary identifier (C-RNTI). Exemplarily, the second information may include DCI format identification, frequency-domain resource allocation, time-domain resource allocation, virtual resource block (VRB) to physical resource block (PRB) mapping (VRB-to-PRB mapping), modulation and coding method, new data indication, redundancy version, HARQ process number, downlink allocation index, PUCCH transmission power control command, PUCCH resource indication, and PDSCH to HARQ feedback timing indication.

[0010] Exemplarily, the payload size of the first information is the same as the payload size of the second information; and / or, the DCI format of the first information is the same as the DCI format of the second information.

[0011] In addition, the bit positions corresponding to the first information field in the first information can be used in the first information to indicate the frequency-domain resources of the downlink data channel, and the first information field is the information field in the second information. This further improves scheduling flexibility. For example, if the first information field occupies the nth bit position in the second information, then in the first information field, the nth bit position indicates the frequency-domain resources, where n is a positive integer.

[0012] Exemplarily, the first information field can be the information field of at least one of the DCI format identifier, new data indication, redundancy version, HARQ process number, downlink allocation index, PUCCH transmission power control command, PUCCH resource indication, or PDSCH-to-HARQ feedback timing indication.

[0013] Wherein, if the first information field is the information field of at least one of the new data indication, redundancy version, HARQ process number, downlink allocation index, PUCCH transmission power control command, PUCCH resource indication, or PDSCH-to-HARQ feedback timing indication, the terminal device also receives third information from the network device. The third information is used to indicate that the terminal device does not support uplink HARQ feedback.

[0014] The size of the frequency-domain resource information field in the above first information can be associated with the first frequency-domain resource, or in other words, the size of the frequency-domain resource information field in the first information is determined according to the first frequency-domain resource.

[0015] In a second aspect, the present application provides a communication method. This method can be executed by a network device or a chip in the network device. Among them, the network device is a radio access network device such as a base station.

[0016] According to this method, the network device determines a first frequency-domain resource and a second frequency-domain resource. Among them, the first frequency-domain resource and the second frequency-domain resource are independently configured, and the second frequency-domain resource includes CORESET0 and the initial BWP. The network device also sends first information to the terminal device, and the first information is used to schedule the downlink data channel of the terminal device. The first information includes frequency-domain resource allocation information, and the frequency-domain resource allocation information is used to indicate the frequency-domain resources of the downlink data channel within the range of the first frequency-domain resource. The first information is scrambled by the G-RNTI.

[0017] In a possible example, the above first information does not include an information field of at least one of a new data indication, a redundant version, a HARQ process number, a downlink allocation index, a PUCCH transmission power control command, a PUCCH resource indication, or a PDSCH to HARQ feedback timing indication. In addition, the first information may not include DCI format identification information, or in other words, the first information does not include a DCI format identification information field, and the DCI format identification information is used to indicate an uplink or downlink DCI format.

[0018] Exemplarily, the network device may further send second information to the terminal device. The second information is DCI format 1_0, and the second information is scrambled by a C-RNTI. Exemplarily, the second information may include a DCI format identification, a frequency domain resource allocation, a time domain resource allocation, a VRB to PRB mapping, a modulation and coding scheme, a new data indication, a redundant version, a HARQ process number, a downlink allocation index, a PUCCH transmission power control command, a PUCCH resource indication, and a PDSCH to HARQ feedback timing indication.

[0019] Exemplarily, the payload size of the first information is the same as the payload size of the second information; and / or, the DCI format of the first information is the same as the DCI format of the second information.

[0020] In addition, the bit positions corresponding to the first information field in the first information can be used in the first information to indicate the frequency domain resources of the downlink data channel, and the first information field is the information field in the second information. Thereby further improving scheduling flexibility. For example, if the first information field occupies the nth bit position in the second information, then in the first information field, the nth bit position is used to indicate the frequency domain resources, where n is a positive integer.

[0021] Exemplarily, the first information field is an information field of at least one of a DCI format identification, a new data indication, a redundant version, a HARQ process number, a downlink allocation index, a PUCCH transmission power control command, a PUCCH resource indication, or a PDSCH to HARQ feedback timing indication.

[0022] Wherein, if the first information field is an information field of at least one of a new data indication, a redundant version, a HARQ process number, a downlink allocation index, a PUCCH transmission power control command, a PUCCH resource indication, or a PDSCH to HARQ feedback timing indication, the network device further sends third information to the terminal device. The third information is used to indicate that the terminal device does not support uplink HARQ feedback.

[0023] The size of the frequency domain resource information field in the above first information may be associated with the first frequency domain resource, or in other words, the size of the frequency domain resource information field in the first information is determined according to the first frequency domain resource.

[0024] In a third aspect, the present application provides a communication device. The communication device can be used to implement the functions involved in the above-mentioned first aspect or any possible design of the first aspect. This function can be implemented by hardware or by hardware executing corresponding software, and the hardware or software includes one or more modules corresponding to the functions, method steps, or operations in the above-mentioned first aspect and any of its designs. Specifically, the communication device can be a terminal device or a chip in the terminal device.

[0025] In a possible example, the communication device may include a communication module (or communication unit) and a processing module (or processing unit). Among them, the communication module can be used for the communication device to communicate, and the processing module can be used for the communication device to implement the processing function of the communication device.

[0026] Among them, the processing module can be used to obtain a first frequency domain resource and a second frequency domain resource. The first frequency domain resource and the second frequency domain resource are independently configured, and the second frequency domain resource includes CORESET0 and an initial BWP. The communication module can be used to receive first information, and the first information is used to schedule a downlink data channel. The first information includes frequency domain resource allocation information, and the frequency domain resource allocation information is used to indicate the frequency domain resource of the downlink data channel within the range of the first frequency domain resource. The first information is scrambled by a G-RNTI.

[0027] Exemplarily, the communication module can also be used to receive second information, the second information is in DCI format 1_0, and the second information is scrambled by a C-RNTI. Exemplarily, the second information may include a DCI format identifier, frequency domain resource allocation, time domain resource allocation, VRB to PRB mapping, modulation and coding scheme, new data indication, redundancy version, HARQ process number, downlink allocation index, PUCCH transmission power control command, PUCCH resource indication, and PDSCH to HARQ feedback timing indication.

[0028] The communication module can also be used to receive third information from the network device. The third information is used to indicate that the terminal device does not support uplink HARQ feedback.

[0029] In another possible example, the communication device may include a processor (or processing chip, processing circuit) and a transceiver (or communication circuit). The processor can be used to call program instructions to execute the processing function of the communication device. The communication module can be used for the communication device to communicate.

[0030] Among them, the processor can be used to obtain a first frequency-domain resource and a second frequency-domain resource. The first frequency-domain resource and the second frequency-domain resource are independently configured. The second frequency-domain resource includes CORESET0 and an initial BWP. The transceiver can be used to receive first information, and the first information is used to schedule a downlink data channel. The first information includes frequency-domain resource allocation information, and the frequency-domain resource allocation information is used to indicate the frequency-domain resource of the downlink data channel within the range of the first frequency-domain resource. The first information is scrambled by a G-RNTI.

[0031] Exemplarily, the transceiver can also be used to receive second information, the second information is in DCI format 1_0, and the second information is scrambled by a C-RNTI. Exemplarily, the second information may include a DCI format identifier, frequency-domain resource allocation, time-domain resource allocation, VRB-to-PRB mapping, modulation and coding scheme, new data indication, redundancy version, HARQ process number, downlink allocation index, PUCCH transmission power control command, PUCCH resource indication, and PDSCH-to-HARQ feedback timing indication.

[0032] The transceiver can also be used to receive third information from the network device. The third information is used to indicate that the terminal device does not support uplink HARQ feedback.

[0033] In a fourth aspect, the present application provides a communication device. The communication device can be used to implement the functions involved in the above second aspect or any possible design of the second aspect. The function can be implemented by hardware or by hardware executing corresponding software, and the hardware or software includes one or more modules corresponding to the functions or method steps or operations in the above second aspect and any of its designs. Specifically, the communication device can be a network device or a chip in a network device.

[0034] In a possible example, the communication device may include a communication module (or communication unit) and a processing module (or processing unit). The communication module can be used for the communication device to communicate, and the processing module can be used for the communication device to implement the processing function of the communication device.

[0035] Among them, the processing module can be used to determine a first frequency-domain resource and a second frequency-domain resource. The first frequency-domain resource and the second frequency-domain resource are independently configured. The second frequency-domain resource includes CORESET0 and an initial BWP. The communication module can be used to send first information to the terminal device, and the first information is used to schedule the downlink data channel of the terminal device. The first information includes frequency-domain resource allocation information, and the frequency-domain resource allocation information is used to indicate the frequency-domain resource of the downlink data channel within the range of the first frequency-domain resource. The first information is scrambled by a G-RNTI.

[0036] Exemplarily, the communication module may also be used to send second information to the terminal device. The second information is DCI format 1_0 and is scrambled by C-RNTI. Exemplarily, the second information may include DCI format identification, frequency-domain resource allocation, time-domain resource allocation, VRB to PRB mapping, modulation and coding scheme, new data indication, redundancy version, HARQ process number, downlink allocation index, PUCCH transmission power control command, PUCCH resource indication, and PDSCH to HARQ feedback timing indication.

[0037] The communication module may also be used to send third information to the terminal device. The third information is used to indicate that the terminal device does not support uplink HARQ feedback.

[0038] In another possible example, the communication device may include a processor (or referred to as a processing chip, processing circuit) and a transceiver (or referred to as a communication circuit). The processor may be used to call program instructions to execute the processing functions of the communication device. The communication module may be used for the communication device to communicate.

[0039] Among them, the processor may be used to determine a first frequency-domain resource and a second frequency-domain resource. The first frequency-domain resource and the second frequency-domain resource are independently configured. The second frequency-domain resource includes CORESET0 and the initial BWP. The transceiver may be used to send first information to the terminal device. The first information is used to schedule the downlink data channel of the terminal device. The first information includes frequency-domain resource allocation information, and the frequency-domain resource allocation information is used to indicate the frequency-domain resource of the downlink data channel within the range of the first frequency-domain resource. The first information is scrambled by G-RNTI.

[0040] Exemplarily, the transceiver may also be used to send second information to the terminal device. The second information is DCI format 1_0 and is scrambled by C-RNTI. Exemplarily, the second information may include DCI format identification, frequency-domain resource allocation, time-domain resource allocation, VRB to PRB mapping, modulation and coding scheme, new data indication, redundancy version, HARQ process number, downlink allocation index, PUCCH transmission power control command, PUCCH resource indication, and PDSCH to HARQ feedback timing indication.

[0041] The transceiver may also be used to send third information to the terminal device. The third information is used to indicate that the terminal device does not support uplink HARQ feedback.

[0042] Fifth aspect, the present application provides a communication system. Exemplarily, the communication system may include a communication device for implementing the above-mentioned first aspect or any possible design of the first aspect, and a communication device for implementing the above-mentioned second aspect or any possible design of the second aspect. Specifically, the communication system may include the communication device described in the third aspect and / or the communication device described in the fourth aspect.

[0043] Sixth aspect, the present application provides a computer storage medium, including program instructions, which when run on a computer, cause the computer to execute the method in the above-mentioned first aspect or any possible design of the first aspect, or the above-mentioned second aspect or any possible design of the second aspect.

[0044] Seventh aspect, an embodiment of the present application provides a computer program product, which when run on a computer, causes the computer to execute the method in the above-mentioned first aspect or any possible design of the first aspect, or the above-mentioned second aspect or any possible design of the second aspect.

[0045] Eighth aspect, an embodiment of the present application provides a chip system, which may include a processor and may also include a memory (or the system chip is coupled to the memory). The chip system executes the program instructions in the memory to execute the method in the above-mentioned first aspect or any possible design of the first aspect, or the above-mentioned second aspect or any possible design of the second aspect. Herein, "coupled" means that two components are directly or indirectly combined with each other. For example, coupling may refer to an electrical connection between two components.

[0046] For the beneficial effects of the methods shown in the above second to eighth aspects, reference may be made to the beneficial effects of the corresponding methods in the first aspect, and details will not be specifically elaborated here to save space. Description of the Drawings

[0047] Figure 1 It is a schematic diagram of the architecture of a wireless communication system provided by an embodiment of the present application;

[0048] Figure 2 It is a schematic diagram of the information field distribution of a DCI format 1_0 provided by an embodiment of the present application;

[0049] Figure 3 It is a schematic flowchart of a communication method provided by an embodiment of the present application;

[0050] Figure 4 It is a schematic diagram of the mutual relationship between a first frequency domain resource and a second frequency domain resource provided by an embodiment of the present application;

[0051] Figure 5 It is a schematic diagram of the information field distribution of a first piece of information provided by an embodiment of the present application;

[0052] Figure 6 Another schematic diagram of the information domain distribution of the first information provided by the embodiment of the present application;

[0053] Figure 7 Another schematic diagram of the information domain distribution of the first information provided by the embodiment of the present application;

[0054] Figure 8 Another schematic diagram of the information domain distribution of the first information provided by the embodiment of the present application;

[0055] Figure 9 A schematic diagram of the structure of a communication device provided by the embodiment of the present application;

[0056] Figure 10 Another schematic diagram of the structure of a communication device provided by the embodiment of the present application;

[0057] Figure 11 Another schematic diagram of the structure of a communication device provided by the embodiment of the present application;

[0058] Figure 12 Another schematic diagram of the structure of a communication device provided by the embodiment of the present application. Detailed implementation manners

[0059] In order to improve the flexibility of multicast transmission frequency domain resource indication, the present application provides a communication method. The following will further describe the present application in detail with reference to the accompanying drawings. It should be understood that the specific operation methods in the method embodiments introduced below can also be applied to the device embodiments or system embodiments.

[0060] As Figure 1 shown, the communication method provided by the embodiment of the present application can be applied to the wireless communication system 100.

[0061] The wireless communication system 100 may include a network device (or access network device) 101, a core network device 102, and at least one terminal device (such as Figure 1 the terminal devices 103 and 104 shown). The terminal device can be connected to the network device 101 in a wireless manner, and the radio access network device is connected to the core network device 102 in a wireless or wired manner. The core network device 102 and the network device 101 can be independent different physical devices. In addition, the function of the core network device and the logical function of the radio access network device can be integrated on the same physical device, or part of the function of the core network device and part of the function of the radio access network device can be integrated on a physical device. For convenience of description hereinafter, the access network device may be referred to as the network device.

[0062] The terminal device can be fixed in position or movable. It should be understood that, Figure 1It is just a schematic diagram of a wireless communication system architecture. Other network devices not shown in Figure 1 the present application may also be included in the communication system provided in the present application, such as wireless relay devices and wireless backhaul devices. The embodiments of the present application do not limit the number of core network devices, radio access network devices, and terminal devices included in the mobile communication system.

[0063] It should be understood that the above wireless communication system 100 is applicable to both low-frequency scenarios (sub 6GHz) and high-frequency scenarios (above 6GHz). The application scenarios of the wireless communication system 100 include but are not limited to long term evolution (LTE) systems, new radio (NR) systems in the fifth generation (5G) mobile communication system, and future mobile communication systems, etc.

[0064] As Figure 1 shown, the network device 101 may be a radio access network device (or called a radio access site). Among them, a radio access network device refers to a device with network access function, such as a radio access network (RAN) base station, etc. The network device 101 may specifically include a base station (BS), or include a base station and a radio resource management device for controlling the base station, etc. The network device 101 may also include a relay station (relay device), an access point, and base stations in future 5G networks, base stations in future evolved PLMN networks, or NR base stations, etc. The network device 101 may be a wearable device or a vehicle-mounted device. The network device 101 may also be a chip with a communication module.

[0065] For example, the network device 101 includes but is not limited to: the next-generation base station (g nodeB, gNB) in 5G, the evolved node B (eNB) in the LTE system, the radio network controller (RNC), the radio controller under the CRAN system, the base station controller (BSC), the home base station (for example, home evolved nodeB, or home node B, HNB), the baseband unit (BBU), the transmitting and receiving point (TRP), the transmitting point (TP), or the mobile switching center, etc. The network device 101 may also include base stations in future 6G or newer mobile communication systems.

[0066] The core network device 102 is deployed on the core network side and is mainly responsible for executing the functions of the core network. The core network device 102 may be a core network element or a chip in a core network element in a 4G, 5G, or future wireless communication system.

[0067] The terminal device shown above may be a user equipment (UE), a terminal, an access terminal, a terminal unit, a terminal station, a mobile station (MS), a remote station, a remote terminal, a mobile terminal, a wireless communication device, a terminal agent, or a terminal device, etc. The terminal device may have a wireless transceiver function, be able to communicate with one or more network devices in one or more communication systems (such as wireless communication), and receive network services provided by the network device. Here, the network device includes but is not limited to the illustrated network device 101.

[0068] Among them, the terminal device may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, a handheld device with wireless communication function, a computing device or other processing devices connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network, or a terminal device in a future evolved PLMN network, etc.

[0069] In addition, the terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; the terminal device can also be deployed on the water surface (such as a ship, etc.); the terminal device can also be deployed in the air (such as an airplane, a balloon, a satellite, etc.). Specifically, the terminal device can be a mobile phone, a pad, a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. The terminal device can also be a communication chip with a communication module, or a vehicle with a communication function, or vehicle-mounted equipment (such as a vehicle-mounted communication device, a vehicle-mounted communication chip), etc.

[0070] Currently in NR, the terminal device can send and receive information within a partial bandwidth (bandwidth part, BWP) configured by the network device 101. On a serving cell, the terminal device can be configured with up to 4 downlink BWPs through the high-layer parameter: BWP Downlink or the high-layer parameter: initial downlink BWP. Generally, for a terminal device, only one BWP can be in the active state at the same time, and the activated BWP is called the active BWP. The terminal device can only send and receive information in the active BWP.

[0071] Specifically, the types of the downlink BWP include the initial BWP (initial BWP), the dedicated BWP (dedicated BWP), and the default BWP (default BWP). Among them, the initial BWP is the BWP configured in the initial access phase of the terminal device. The initial BWP is configured by the system message. Therefore, for the terminal devices in the same cell, the initial BWP is the same. The downlink initial BWP is used for the PDSCH that transmits signaling such as the remaining minimum system information (RMSI), msg2, and msg4. The dedicated BWP is the BWP configured when the UE is in the radio resource control (RRC) connected state and can only be used for the terminal device to send and receive information.

[0072] It should be understood that in this application, sending and receiving information includes, but is not limited to, the sending and receiving of signaling and data.

[0073] In addition, each downlink BWP contains at least one control resource set (CORESET) with a dedicated search space.

[0074] Each CORESET may include multiple physical resource blocks in the frequency domain. Also, the CORESET includes 1 to 3 OFDM symbols in the time domain, and these OFDM symbols can be located at any position within the time slot. The time-frequency resources occupied by the CORESET are semi-statically configured by high-layer parameters. In the frequency domain, the configuration of the CORESET supports both continuous and discrete frequency domain resource configurations, and the configured CORESET does not exceed the frequency domain range of the active BWP. The number of resource blocks (RBs) of CORESET0 is indicated by the system message. Therefore, for the terminal devices in the same cell, CORESET0 is the same.

[0075] When Figure 1 When the number of the shown terminal devices is multiple, the network device 101 can perform transmission to multiple terminal devices through multicast transmission. It should be understood that the multicast transmission includes, but is not limited to, groupcast transmission and / or broadcast transmission. When performing multicast transmission, the network device 101 sends a downlink control information to multiple terminal devices in the cell (which may be all or part of the terminal devices in the cell) to instruct these terminal devices to receive the PDSCH on the same frequency domain resources. Correspondingly, the terminal device can receive and send information within the frequency domain resources corresponding to the active BWP. Since the dedicated BWP of each terminal device is independently configured, it is necessary to send the multicast transmission on the frequency domain resources common to all target terminals.

[0076] In one implementation, the terminal device can only detect one DCI format in the common search space, namely DCI format 1_0. DCI format 1_0 in this application can represent DCI with a DCI format of 1_0. It should be understood that DCI format 1_0 can be scrambled by multiple radio network temporary identities (RNTIs) to represent different information. As an example, the number of bits carried by DCI format 1_0 scrambled by different RNTIs is usually the same.

[0077] As Figure 2 shown, when the cyclic redundancy check (CRC) of DCI format 1_0 is scrambled by the cell-radio network temporary identifier (C-RNTI), the distribution of the information field of an exemplary DCI format 1_0 is as Figure 2 shown. It should be understood that Figure 2 the information field shown is linearly arranged, rather than in an array arrangement. It should be understood that Figure 2 this is only a schematic diagram. In the specific DCI transmission process, the receiving party receives / obtains the information of each field in the DCI according to the predetermined position or arrangement.

[0078] It can be seen that DCI format 1_0 may include the following information fields:

[0079] The identifier for DCI formats information field, which is used to indicate the DCI format. For example, the identifier for DCI formats information field includes one bit. If this bit is set to 1, it is used to identify the downlink DCI format. If this bit is set to 0, it is used to identify the uplink DCI format.

[0080] The frequency domain resource assignment (FDRA) information field, which is used to indicate the frequency domain resources occupied by the data channel transmission, such as indicating the starting position (such as the starting RB) and width (such as the number of RBs of the frequency domain resources) of the frequency domain resources.

[0081] The time domain resource assignment (TDRA) information field, which is used to indicate the time domain resources occupied by the data channel transmission.

[0082] Virtual Resource Block (VRB) to Physical Resource Block (PRB) mapping information field, which is used to indicate whether the VRB-to-PRB mapping is interleaved or non-interleaved.

[0083] Modulation and Coding Scheme (MCS) information field, which is used to indicate the modulation order and code rate adopted by the data channel.

[0084] New Data Indicator (NDI) information field, which is used to identify the initial transmission (or the first transmission). When retransmitting, the bits in this information field are not inverted, and they are inverted during the initial transmission. For example, if the bit in the NDI information field of the initial transmission of a data packet is 1, the bits in the NDI information field of the DCI during 3 retransmissions are all 1; if the data for the next transmission is an initial transmission data packet, the bit in the NDI information field of the DCI is inverted to 0.

[0085] Redundancy Version (RV) information field, which is used to indicate the RV of the scheduled data channel. For example, the redundant bits generated by the encoder are divided into several groups, and each RV defines a transmission start point. Different RVs are used for the first transmission and each HARQ retransmission respectively to achieve the gradual accumulation of redundant bits and complete the incremental redundancy HARQ operation.

[0086] HARQ Process Number (HPN) information field, which is used to indicate the HARQ process number of the data.

[0087] Downlink Assignment Index information field, which is used to indicate the number of the data channel fed back in a codebook when constructing the dynamic codebook.

[0088] Transmission Power Control (TPC) command for scheduled PUCCH information field. When the data channel scheduled by this DCI needs to send HARQ feedback information, this information field is used to adjust the power of the PUCCH carrying this HARQ feedback information.

[0089] PUCCH Resource Indicator information field. When the data channel scheduled by this DCI needs to send HARQ feedback information, this information field is used to indicate the resource of the PUCCH carrying this HARQ feedback information.

[0090] The Physical Downlink Shared Channel (PDSCH) to Hybrid Automatic Repeat reQuest (HARQ) feedback timing indicator information field (which may be referred to as the K1 information field). When the data channel scheduled by the Downlink Control Information (DCI) needs to send HARQ feedback information, this information field is used to indicate the offset from the time slot where the data channel scheduled by the DCI is located to the time slot where the channel carrying the HARQ corresponding to the PDSCH is located (hereinafter referred to as the PDSCH to HARQ feedback timing).

[0091] It should be understood that in this application, the information field may refer to the bits included in the information field; or the information field may refer to the information corresponding to the information field, such as the value of the bits included in the information field and / or the information represented by the value of the bits. For example, the DCI format identification information field may be the bits corresponding to the DCI format identification information field, or the DCI format identification information field may be the value of the bits and / or the information represented by the value of the bits.

[0092] The above Figure 2 The structures shown above are merely exemplary descriptions and should not be construed as limiting the DCI shown in this application Figure 2 to the structures shown. For example, when the Cyclic Redundancy Check (CRC) of DCI format 1_0 is scrambled by the System Information - Radio Network Temporary Identifier (SI-RNTI), DCI format 1_0 may include a frequency domain resource allocation information field, a time domain resource allocation information field, a Virtual Resource Block (VRB) to Physical Resource Block (PRB) mapping information field, a modulation and coding scheme information field, a system information indicator information field, and reserved bits (or referred to as reserved bit positions). Here, it may also be scrambled by other identifiers. In addition Figure 2 the sizes of the information fields shown above do not represent the actual lengths of the information fields in the DCI (i.e., the number of bits included in the information fields).

[0093] The size of the frequency domain resource allocation information field of the above DCI format 1_0 (i.e., the number of bits included in the frequency domain resource allocation information field) is determined according to the frequency domain width corresponding to CORESET0 or the initial Bandwidth Part (BWP), which means that the frequency domain resources for multicast transmission according to the prior art can only be CORESET0 or the initial BWP, thus affecting the flexibility of multicast transmission frequency domain resource scheduling.

[0094] Based on Figure 1In the architecture shown, the communication method provided by the embodiments of the present application can be executed by the network device 101 and at least one terminal device to improve the flexibility of frequency-domain resource scheduling in multicast transmission. Among them, the terminal device may include the terminal device 103, the terminal 104, and / or Figure 1 other terminal devices not shown. The method may include Figure 3 the following steps shown:

[0095] S101: The terminal device obtains the first frequency-domain resource.

[0096] Specifically, the terminal device may obtain the starting RB and the frequency-domain width of the first frequency-domain resource through system messages or high-layer parameters.

[0097] In a specific example, the terminal device may obtain the first frequency-domain resource through system messages or RRC signaling. Optionally, the frequency-domain resource is the first BWP. In addition, the first frequency-domain resource may also be dynamically indicated by DCI. Specifically, system messages, RRC signaling, or DCI may be used to indicate at least one of the index of the first BWP (such as the BWP identifier), the starting position of the first frequency-domain resource, the frequency-domain width of the first frequency-domain resource, or the numerology of the first frequency-domain resource. Among them, the numerology of the first frequency-domain resource includes the subcarrier spacing (SCS) and the cyclic prefix (CP).

[0098] In another example, the first frequency-domain resource is a subset or a proper subset of the third frequency-domain resource. The third frequency-domain resource is the activated BWP. The terminal device may obtain the third frequency-domain resource through system messages or RRC signaling.

[0099] In one embodiment, the terminal device also obtains the second frequency-domain resource. The first frequency-domain resource and the second frequency-domain resource are configured independently. Or rather, the first frequency-domain resource does not depend on the configuration of the second frequency-domain resource.

[0100] In a possible example, that the first frequency-domain resource and the second frequency-domain resource are configured independently may mean that the first frequency-domain resource and the second frequency-domain resource adopt different signaling configurations, or it may mean that the first frequency-domain resource and the second frequency-domain resource are configured by different fields in the same signaling. In a further optional embodiment, the configurations between different signaling are not mutually referenced, or the different fields are not mutually referenced.

[0101] For example, the second frequency domain resource may be configured by the network device 101 through a system message, and the first frequency domain resource may be configured by the network device 101 through a high-layer signaling. Another example is that the first frequency domain resource is configured by, for example, the first RRC signaling, and the second frequency domain resource is configured by the second RRC signaling. Among them, the frequency domain width of the second frequency domain resource is the number of PRBs corresponding to CORESET0, and CORESET0 is configured by the system message. Or, the frequency domain width of the second frequency domain resource is the initial BWP, and the initial BWP is configured by the system message or high-layer parameters. Or, the frequency domain width of the second frequency domain resource is a predefined BWP, or a predefined frequency domain width.

[0102] In another possible example, the first frequency domain resource and the second frequency domain resource are configured independently, which may mean that the configuration of the first frequency domain resource does not refer to the second frequency domain resource. For example, the frequency domain width of the first frequency domain resource has nothing to do with the frequency domain width of the second frequency domain resource, and / or the starting position of the first frequency domain resource has nothing to do with the starting position of the second frequency domain resource. In implementation, the first parameter for configuring the first frequency domain resource may not be determined with reference to the second parameter, and the second parameter is used to configure the second frequency domain resource. Among them, the first parameter may be a direct parameter for determining the first frequency domain resource. For example, the first parameter includes the first frequency domain resource; the first parameter may also be an indirect parameter for determining the first frequency domain resource. For example, the first parameter includes a resource indication value (RIV) and / or other parameters for configuring the frequency domain resource. Similarly, the second parameter may be a direct parameter or an indirect parameter for determining the second frequency domain resource.

[0103] Here, specific examples are used for illustration. If the second frequency domain resource includes CORESET0, and CORESET0 is determined according to parameter A, then the first information may include parameter B, and this parameter B is not determined with reference to parameter A. If the second frequency domain resource includes the initial BWP, and the initial BWP is determined according to parameter C, then the first information may include parameter B, and this parameter B is not determined with reference to parameter C. If the second frequency domain resource includes CORESET0 and the initial BWP, where CORESET0 is determined according to parameter A and the initial BWP is determined according to parameter C, then the first information may include parameter B, and this parameter B is not determined with reference to parameter A and this parameter B is not determined with reference to parameter C.

[0104] Next, the possible configuration methods of the first frequency domain resource and the second frequency domain resource are illustrated by way of examples.

[0105] In a possible configuration method, the starting position of the first frequency domain resource and the starting position of the second frequency domain resource are independent of each other and do not refer to each other, and the frequency domain width of the first frequency domain resource and the frequency domain width of the second frequency domain resource are independent of each other and do not refer to each other.

[0106] For example, Figure 4 In the case of, as shown by numbers (a) and (b), the starting frequency position of the first frequency domain resource is f1, the starting position of the second frequency domain resource is f2, and f1 is not equal to f2, and f1 is not determined with reference to f2; the frequency domain width of the first frequency domain resource is F1, the frequency domain width of the second frequency domain resource is F2, and F1 is not equal to F2, and F1 is not determined with reference to F2.

[0107] In another possible configuration, the starting position of the first frequency domain resource and the starting position of the second frequency domain resource are independent of each other and not determined with reference to each other. In addition, the frequency domain width of the first frequency domain resource can be determined with reference to the frequency domain width of the second frequency domain resource. For example, the frequency domain width of the first frequency domain resource is set according to the frequency domain width of the second frequency domain resource. For example, the width of the first frequency domain resource is set to be equal to the frequency domain width of the second frequency domain resource, or there is a multiple relationship between the frequency domain width of the first frequency domain resource and the frequency domain width of the second frequency domain resource, and so on.

[0108] For example, Figure 4 In the case of, as shown by numbers (c) and (d), the starting frequency position of the first frequency domain resource is f1, the starting position of the second frequency domain resource is f2, and f1 is not equal to f2, and f1 is not determined with reference to f2; the frequency domain width of the first frequency domain resource is set to be the same as the frequency domain width of the second frequency domain resource, for example, both are F0.

[0109] In another possible configuration, the frequency domain width of the first frequency domain resource and the frequency domain width of the second frequency domain resource are independent of each other and not determined with reference to each other. In addition, the starting position of the first frequency domain resource can be determined with reference to the starting position of the second frequency domain resource. For example, the starting position of the first frequency domain resource is set according to the starting position of the second frequency domain resource. For example, the starting position of the first frequency domain resource is set to be equal to the starting position of the second frequency domain resource, or there is a multiple relationship between the frequency domain width of the first frequency domain resource and the frequency domain width of the second frequency domain resource, and so on.

[0110] For example, Figure 4 In the case of, as shown by number (e), the frequency domain width of the first frequency domain resource is F1, the frequency domain width of the second frequency domain resource is F2, and F1 is not equal to F2, and F1 is not determined with reference to F2; the starting position of the first frequency domain resource is set to be the same as the starting position of the second frequency domain resource, both are f0.

[0111] In addition, the starting position of the first frequency domain resource and the starting position of the second frequency domain resource can be the same, and the frequency domain width of the first frequency domain resource and the frequency domain width of the second frequency domain resource can be the same. Among them, the starting position of the first frequency domain resource is not determined with reference to the starting position of the second frequency domain resource, and the frequency domain width of the first frequency domain resource is not determined with reference to the frequency domain width of the second frequency domain resource. As Figure 4The frequency-domain start position of the first frequency-domain resource and the start position of the second frequency-domain resource shown in the number (f) are both f0; the frequency-domain width of the first frequency-domain resource and the frequency-domain width of the second frequency-domain resource are both F0.

[0112] In another example, the first frequency-domain resource and the second frequency-domain resource are configured independently, which may mean that the parameters of the frequency-domain resources configured by the network device for the first frequency domain are sufficient to determine the first frequency-domain resource, and / or the parameters of the frequency-domain resources configured by the network device for the second frequency domain are sufficient to determine the second frequency-domain resource.

[0113] It should be understood that the above method of independently configuring the first frequency-domain resource and the second frequency-domain resource is only an example. According to the general understanding of those skilled in the art, any of the above methods can also be combined and implemented. That is to say, the first frequency-domain resource and the second frequency-domain resource are configured through independent signaling, and / or the first frequency-domain resource and the second frequency-domain resource do not refer to each other, and / or the parameters of the frequency-domain resources configured for the second frequency domain are sufficient to determine the second frequency-domain resource.

[0114] Further, the second frequency-domain resource may include CORESET0 and the initial BWP. Among them, CORESET0 and / or the initial BWP can be configured through system messages or RRC signaling. CORESET0 represents the control resource set with the index number 0. Specifically, the UE determines the control resource set for the type 0 PDCCH common search space set through the master information block (MIB). The number of consecutive resource blocks of the control resource set for the type 0 PDCCH common search space set is obtained through the parameter controlResourceSetZero in the system message pdcch-ConfigSIB1 or the high-layer parameter PDCCH-ConfigCommon, that is, the frequency-domain width corresponding to the CORESET0. The UE obtains the initial downlink BWP through the high-layer parameter initialDownlinkBWP. If the UE does not obtain the high-layer parameter initialDownlinkBWP, the frequency-domain width of the second frequency-domain resource is determined by CORESET0. Or rather, if the UE does not obtain the high-layer parameter initialDownlinkBWP, the initial downlink BWP is defined as a group of consecutive PRBs, the starting PRB is the PRB with the smallest index number in the control resource set of the type 0 PDCCH common search space set, and the ending PRB is the PRB with the largest index number in the control resource set of the type 0 PDCCH common search space set.

[0115] It should be understood that the starting position of the first frequency-domain resource and the starting position of the second frequency-domain resource may be the same or different. In addition, the frequency-domain width of the first frequency-domain resource and the frequency-domain width of the second frequency-domain resource may be the same or different. Among them, the RB index number corresponding to the starting position of the first frequency-domain resource may be greater than the RB index number corresponding to the starting position of the second frequency-domain resource, or the RB index number corresponding to the starting position of the first frequency-domain resource may be less than the RB index number corresponding to the starting position of the second frequency-domain resource. In addition, the frequency-domain width of the first frequency-domain resource may be greater than the frequency-domain width of the second frequency-domain resource, or the frequency-domain width of the first frequency-domain resource may be less than the frequency-domain width of the second frequency-domain resource.

[0116] For example, the relationship between the first frequency-domain resource and the second frequency-domain resource is as shown in Figure 4 any one of (a), (b), (c), (d), (e), or (f) in the figure. Among them, as shown in (a) and (b), the frequency-domain starting position of the first frequency-domain resource is f1, the starting position of the second frequency-domain resource is f2, and f1 is not equal to f2; the frequency-domain width of the first frequency-domain resource is F1, the frequency-domain width of the second frequency-domain resource is F2, and F1 is not equal to F2. Among them, the first frequency-domain resource shown in (a) and the second frequency-domain resource have a frequency-domain overlap, and the first frequency-domain resource shown in (b) and the second frequency-domain resource do not have a frequency-domain overlap. As shown in (c) and (d), the frequency-domain starting position of the first frequency-domain resource is f1, the starting position of the second frequency-domain resource is f2, and f1 is not equal to f2; the frequency-domain width of the first frequency-domain resource and the frequency-domain width of the second frequency-domain resource are both F0. Among them, the first frequency-domain resource shown in (c) and the second frequency-domain resource have a frequency-domain overlap, and the first frequency-domain resource shown in (d) and the second frequency-domain resource do not have a frequency-domain overlap. As shown in (e), the frequency-domain starting position of the first frequency-domain resource and the starting position of the second frequency-domain resource are both f0; the frequency-domain width of the first frequency-domain resource is F1, the frequency-domain width of the second frequency-domain resource is F2, and F1 is not equal to F2. As shown in (f), the frequency-domain starting position of the first frequency-domain resource and the starting position of the second frequency-domain resource are both f0; the frequency-domain width of the first frequency-domain resource and the frequency-domain width of the second frequency-domain resource are both F0.

[0117] S102: The network device sends the first information to the terminal device, and the first information is used to schedule the downlink data channel.

[0118] Among them, the first information includes frequency-domain resource allocation information. Optionally, the frequency-domain resource allocation information is used to indicate the frequency-domain resources of the downlink data channel within the range of the first frequency-domain resource. As an embodiment, the frequency-domain resource allocation information may be a resource indication value (represented by RIV in the following formula), and the resource indication value may satisfy an association relationship with the starting RB of the PDSCH and the number of consecutive RBs.

[0119] If the starting resource block of PDSCH (denoted as RBstart in the following formula) and the number of consecutive resource blocks (denoted as LRBs in the following formula) satisfy the following formula:

[0120]

[0121] Then the resource indication value satisfies the following formula:

[0122]

[0123] Otherwise, if the starting resource block of PDSCH and the number of consecutive resource blocks do not satisfy Formula 1, then the RIV satisfies the following formula:

[0124]

[0125] Wherein, L RBs ≥ 1 and does not exceed is the number of resource blocks of the first time-domain resource.

[0126] Above, the starting resource block of PDSCH can be expressed as the offset between the minimum resource block corresponding to PDSCH and the minimum resource block of the first frequency-domain resource.

[0127] Exemplarily, the first information is scrambled by the G-RNTI, that is to say, the first information is sent to one or more terminal devices including the terminal device, and the data channel scheduled by the first information is transmitted by multicast or broadcast. It should be understood that the above frequency-domain resource allocation information can also be to indicate the frequency-domain resource in an explicit manner, or can be implicitly indicated by the association relationship between certain parameters and the frequency domain; in some embodiments, the allocated frequency-domain resource is not limited to, or not restricted to, the scope of the above first frequency-domain resource. It can be that the terminal device directly obtains the information of the frequency-domain resource and directly uses it in subsequent communications, or it can be that after the terminal device obtains the first information, and then according to the preset rules, in cooperation with the obtained first frequency-domain resource, determines the frequency-domain resource finally adopted in the subsequent communication process.

[0128] Correspondingly, the terminal device receives the first information.

[0129] By using the above method, the scheduling of multicast or broadcast data channels can be performed through the first information. Among them, the first frequency-domain resource associated with the first information is no longer associated with the CORESET0 and / or the initial BWP configured by the network device 101, that is, the size of the first frequency-domain resource is not limited to CORESET0 or the initial BWP, and can be flexibly configured. Here, the size of the first frequency-domain resource is not limited to CORESET0 or the initial BWP, which may also mean that the configured first frequency-domain resource may not refer to CORESET0 and / or the initial BWP. Therefore, the flexibility of the frequency-domain resource indication for multicast transmission is improved.

[0130] One or more specific examples of the first information will be given below. It should be understood that the design of the following first information can be combined with the above embodiments, or can be used alone as multiple embodiments. Exemplarily, the first information is DCI.

[0131] Exemplarily, the first information does not include a first information field. The first information field may include a DCI format identification information field. In addition, the first information field may include at least one of a new data indication information field, a redundancy version information field, a HARQ process number information field, a downlink allocation index information field, a PUCCH transmission power control command information field, a PUCCH resource indication information field, or a PDSCH to HARQ feedback timing indication information field. In one embodiment, the first information field may further include at least one of a virtual resource block to physical resource block mapping information field and a modulation and coding scheme information field. Therefore, in the first information, the bit positions corresponding to the above first information fields can be used as the bit positions in other information fields, for example, for indicating the frequency-domain resources of the downlink data channel, so as to further improve the flexibility of the frequency-domain resource indication.

[0132] It should be understood that the bit positions corresponding to the first information field in the first information, or referred to as the bit positions corresponding to the first information field in the first information, in this application refer to the bit positions in the first information whose sequence numbers are the same as the sequence numbers of the bit positions occupied by the first information field in the second information. For example, in the second information, the nth bit position is the bit position occupied by the first information field, then in the first information, the nth bit position can be regarded as the bit position corresponding to the first information field in the first information, where n is a positive integer.

[0133] In practice, optionally, the network device 101 may also send second information to the terminal device. Among them, the second information may be scrambled by C-RNTI or other RNTIs. Exemplarily, the information field of the second information may include, for example Figure 2The DCI format identification information field, frequency domain resource allocation information field, time domain resource allocation information field, VRB to PRB mapping information field, modulation and coding scheme information field, new data indication information field, redundancy version information field, HARQ process number information field, downlink allocation index information field, PUCCH transmission power control command information field, PUCCH resource indication information field, and PDSCH to HARQ feedback timing indication information field as shown. Among them, the size of the frequency domain resource allocation information field of the second information is determined according to CORESET0 or the initial BWP.

[0134] For example, the size l of the frequency domain resource allocation information field of the second information satisfies the following formula:

[0135]

[0136] Wherein, represents rounding up. represents the width of CORESET0 or the width of the initial BWP. Exemplarily, the width of CORESET0 is 24, 48, or 96 RBs.

[0137] It should be understood that the second information may be DCI format 1_0. In one embodiment, the number of bits of the second information is the same as that of the first information.

[0138] Such as Figure 5 shown, in one embodiment, the first information consists of a frequency domain resource allocation information field, a time domain resource allocation information field, a VRB to PRB mapping information field, a modulation and coding scheme information field, and reserved bit positions. In another embodiment, the information fields of a first information in the present application may consist of a frequency domain resource allocation information field, a time domain resource allocation information field, a VRB to PRB mapping information field, and a modulation and coding scheme information field.

[0139] Furthermore, the bit positions occupied by the first information field in the second information are used to indicate frequency domain resource allocation in the first information, or rather, this bit position is the bit field corresponding to the FDRA information field in the first information, as Figure 5 shown. Or in other words, the bit positions occupied by the first information field in the second information are included in the FDRA information field, thereby increasing the size of the FDRA information field, as Figure 6 shown, or rather, increasing the number of bits included in the FDRA information field, so as to achieve more flexible frequency domain resource indication. Among them, the first information field may include at least one information field of the DCI format identification information field, new data indication information field, redundancy version information field, HARQ process number information field, downlink allocation index information field, PUCCH transmission power control command information field, PUCCH resource indication information field, or PDSCH to HARQ feedback timing indication information field.

[0140] For example, the first bit in the second information is the bit occupied by the DCI format identification information field. Since there is no DCI format identification information field in the first information, the first bit is used to indicate frequency domain resource allocation.

[0141] For another example, the m-th bit in the second information is the new data indication information field. Since there is no new data indication information field in the first information, the m-th bit is used to indicate frequency domain resource allocation. Here, m is a positive integer.

[0142] For still another example, the a-th to b-th bits in the second information are the downlink allocation index information field. Since there is no downlink allocation index information field in the first information, the a-th to b-th bits are used to indicate frequency domain resource allocation. Here, a and b are positive integers and a ≤ b.

[0143] Optionally, Figure 5 the payload size of the first information shown is the same as the payload size of the second information. Exemplarily, Figure 5 the payload size of the first information shown and the payload size of the second information are both l + 28 bits. Here, l represents the number of bits of the frequency domain resource allocation information field in the second information, and the number of bits of the frequency domain resource allocation information field is determined according to the width of CORESET0 and the initial BWP, or the number of consecutive resource blocks, as shown in Formula 4. 28 represents the sum of the number of bits of all other information fields in the second information except the frequency domain resource allocation information field. To ensure that the payload size of the first information is the same as the payload size of the second information, then as Figure 6 shown, several reserved bit positions need to be added to the first information. At this time, the information fields of the first information may include the FDRA information field, the TDRA information field, the VRB-to-PRB mapping information field, and the reserved bit positions.

[0144] Exemplarily, as Figure 6 shown, the size L0 of the reserved bit positions in the first information satisfies the following Formula 5:

[0145]

[0146] represents the sum of the number of bits of all other information fields in the first information except the frequency domain resource allocation information field.

[0147] For example, including but not limited to: L1 is the number of bits occupied by the time domain resource allocation information field. For example, L1 = 4 bit; L2 is the number of bits occupied by the modulation and coding mode information field. For example, L2 = 5 bit; L3 is the number of bits occupied by the VRB-to-PRB mapping information field. For example, L3 = 1 bit.

[0148] For another example, Include but not limited to: the number of bits occupied by the L1 time-domain resource allocation information field. For example, L1 = 4 bits; L2 is the number of bits occupied by the modulation and coding scheme information field. For example, L2 = 5 bits; L3 is the number of bits occupied by the VRB-to-PRB mapping information field. For example, L3 = 1 bit; L4 is the number of bits occupied by the new data indication information field. For example, L4 = 1. L5 is the number of bits occupied by the redundancy version information field. For example, L5 = 2. L6 is the number of bits occupied by the HARQ process number information field. For example, L6 = 4. L7 is the number of bits occupied by the downlink allocation index information field. For example, L7 = 2. L8 is the number of bits occupied by the PUCCH transmission power control command information field. For example, L8 = 2. L9 is the number of bits occupied by the PUCCH resource indication information field. For example, L9 = 3. L 10 Is the number of bits occupied by the PDSCH-to-HARQ feedback timing indication information field. For example, L 10 = 3.

[0149] The optional reserved bit L0 can be equal to 0.

[0150] Optionally, such as Figure 5 And / or Figure 6 As shown, the size of the frequency-domain resource allocation information field of the first information is associated with the first frequency-domain resource. Or in other words, the size of the frequency-domain resource allocation information field of the first information is determined according to the first frequency-domain resource. For example, the size of the frequency-domain resource allocation information field of the first information is determined according to the width of the first frequency-domain resource (such as the number of RBs of the first frequency-domain resource). The frequency-domain resource allocation information field contains L bits and satisfies the following formula six:

[0151]

[0152] Where Represents rounding up. Represents the width of the first frequency-domain resource.

[0153] Optionally, the above Figure 5 And / or Figure 6 The format of the first information shown can be DCI format 1_0, that is, the first information can have the same DCI format as the second information.

[0154] After receiving the first information as shown in Figure 5 And / or Figure 6 The terminal device can perform data transmission according to the scheduling of the first information.

[0155] It should be understood that as shown in Figure 5 And / or Figure 6The first information shown can be applied to scenarios where the terminal device does not support uplink HARQ feedback. For example, the network device 101 can send the third information to the terminal device, and the third information is used to indicate that the current transmission of the terminal device does not support uplink HARQ feedback. Alternatively, it can be defaulted that the terminal device supports uplink HARQ feedback. Among them, the third information can be dynamic signaling, such as DCI signaling. Alternatively, the third information can be high-layer signaling, including radio resource control (RRC) signaling, or media access control (MAC) control element (CE).

[0156] For example, the terminal device receives the third information from the network device 101. The third information is used to indicate that uplink HARQ feedback is not supported, then the first information may include a frequency-domain resource allocation information field, a time-domain resource allocation information field, a VRB-to-PRB mapping information field, a modulation and coding scheme information field. And the first information does not include at least one of a new data indication information field, a redundancy version information field, a HARQ process number information field, a downlink allocation index information field, a PUCCH transmission power control command information field, a PUCCH resource indication information field, or a PDSCH-to-HARQ feedback timing indication information field. The bit positions corresponding to at least one of the new data indication information field, the redundancy version information field, the HARQ process number information field, the downlink allocation index information field, the PUCCH transmission power control command information field, the PUCCH resource indication information field, or the PDSCH-to-HARQ feedback timing indication information field in the second information are used to indicate frequency-domain resource allocation in the first information. At this time, the first information can have Figure 5 and / or Figure 6 the structure shown.

[0157] In addition, if the fourth information received by the terminal device is used to indicate support for uplink HARQ feedback, the first information may include a frequency-domain resource allocation information field, a time-domain resource allocation information field, a VRB-to-PRB mapping information field, a modulation and coding scheme information field, a new data indication information field, a redundancy version information field, a HARQ process number information field, a downlink allocation index information field, a PUCCH transmission power control command information field, a PUCCH resource indication information field, and a PDSCH-to-HARQ feedback timing indication information field. Or, in other words, the first information includes at least one of the new data indication information field, the redundancy version information field, the HARQ process number information field, the downlink allocation index information field, the PUCCH transmission power control command information field, the PUCCH resource indication information field, and the PDSCH-to-HARQ feedback timing indication information field. Or, to put it another way, if the fourth information received by the terminal device is used to indicate support for uplink HARQ feedback, the first information does not include a DCI format identification information field. Among them, the fourth information may be dynamic signaling, such as DCI signaling. Or, the fourth information may be higher-layer signaling, including radio resource control (RRC) signaling, or MAC CE.

[0158] In a feasible example, the bit corresponding to the first information field in the first information may be used to indicate frequency-domain resource allocation. For example, if the nth bit in the second information is the bit occupied by the first information field, then in the first information, the nth bit is the bit corresponding to the first information field in the first information and can be used to indicate frequency-domain resource allocation. Specifically, if the nth bit in the second information is included in the DCI format identification information field, the new data indication information field, the redundancy version information field, the HARQ process number information field, the downlink allocation index information field, the PUCCH transmission power control information field, the PUCCH resource indication information field, or the PDSCH-to-HARQ feedback timing indication information field, then the nth bit in the first information can be used to indicate frequency-domain resource allocation. Or, in other words, the nth bit in the first information is included in the frequency-domain resource allocation information field, where n is a positive integer. For example, in the information field of the second information, the first bit is used to indicate the DCI format, that is, in the information field of the second information, the bit corresponding to the DCI format identification information field includes the first bit in the information field of the second information. In the first information, the first bit is for frequency-domain resource allocation.

[0159] In another possible example, the DCI format of the first information is different from DCI format 1_0. The payload size of the first information may be different from that of the second information. All bits in the first information have their respective functions. The first information may not include reserved bits. The first information does not include the first information field. For example Figure 7As shown, the information fields of a first piece of information in the present application are composed of a frequency-domain resource allocation information field, a time-domain resource allocation information field, a VRB-to-PRB mapping information field, a modulation and coding scheme information field, a new data indication information field, a redundancy version information field, a HARQ process number information field, a downlink allocation index information field, a PUCCH transmission power control command information field, a PUCCH resource indication information field, and a PDSCH-to-HARQ feedback timing indication information field. Alternatively, the information fields in the first piece of information are: a frequency-domain resource allocation information field, a time-domain resource allocation information field, a VRB-to-PRB mapping information field, and a modulation and coding scheme information field.

[0160] Exemplarily, Figure 7 The size of the time-domain resource allocation information field in the first piece of information shown may be the same as that in the second piece of information, for example, both are 4 bits; the size of the VRB-to-PRB mapping information field in the first piece of information may be the same as that in the second piece of information, for example, both are 1 bit; the size of the modulation and coding scheme information field in the first piece of information may be the same as that in the second piece of information, for example, both are 5 bits; the size of the new data indication information field in the first piece of information may be the same as that in the second piece of information, for example, both are 1 bit; the size of the modulation and coding scheme information field in the first piece of information may be the same as that in the second piece of information, for example, both are 5 bits; the size of the downlink allocation index information field in the first piece of information may be the same as that in the second piece of information, for example, both are 2 bits; the size of the PUCCH transmission power control command information field in the first piece of information may be the same as that in the second piece of information, for example, both are 2 bits.

[0161] Furthermore, in the second piece of information, the number of bits occupied by the first information field can be Figure 7 used to indicate frequency-domain resource allocation in the first piece of information shown. Or, in other words, the number of bits occupied by the first information field in the second piece of information is included in the Figure 6 FDRA information field shown, thereby increasing the size of the frequency-domain resource allocation information field, or increasing the number of bits included in the frequency-domain resource allocation information field, so as to achieve more flexible frequency-domain resource indication. For example, the first bit in the second piece of information is the bit occupied by the DCI format identification information field, and there is no DCI format identification information field in the first piece of information. The first bit in the first piece of information is used to indicate frequency-domain resource allocation.

[0162] Optionally, the size of the FDRA field is determined by the frequency-domain width of the first frequency-domain resource. As Figure 6The size of the frequency-domain resource allocation information field shown is related to the width of the first frequency-domain resource (e.g., the number of RBs of the first frequency-domain resource). For example, the size L of the frequency-domain resource allocation information field satisfies the above formula four.

[0163] Further, the network device 101 can set the necessary information fields and the number of bits in the broadcast / multicast DCI through higher-layer signaling:

[0164] Figure 7 In, the size of the redundancy version information field can be determined by the terminal device according to the first indication information from the network device 101. The first indication information can be RRC signaling. The first indication information is used to indicate the number of bits m of the redundancy version information field. When m = 0, the redundancy version of the data channel scheduled by the first information is defaulted to RV0. When m = 1, the redundancy version of the data channel indicated by the redundancy version information field can be RV0 and RV3, or RV0 and RV2, or RV0 and RV1.

[0165] Figure 7 In, the size of the HARQ process number information field can be determined by the terminal device according to the second indication information from the network device 101. The second indication information can be RRC signaling. The second indication information is used to indicate the number of bits n of the HARQ process number information field. Alternatively, the number of the second indication information is I1, When n = 0, the HARQ process number of the PDSCH scheduled by the first information is 1 or 0; when n = 1, there are at most 2 processes of the PDSCH scheduled by the first information; when n = 2, there are at most 4 processes of the PDSCH scheduled by the first information; when n = 3, there are at most 8 processes of the PDSCH scheduled by the first information; when n = 4, there are at most 16 processes of the PDSCH scheduled by the first information.

[0166] Figure 7 In, the size of the PDSCH-to-HARQ feedback timing indication information field can be determined by the terminal device according to the third indication information from the network device 101. The third indication information can be RRC signaling. The third indication information is used to indicate the number of bits q of this information field. Alternatively, the number of the third indication information is I2, The value of q can be 0, 1, 2, or 3. When q is 0, the PDSCH-to-HARQ feedback timing is determined by higher-layer parameters.

[0167] Figure 7 In, the size of the PUCCH resource indication information field can be determined by the terminal device according to the fourth indication information from the network device 101. The fourth indication information can be RRC signaling. The fourth indication information is used to indicate the number of bits p of this information field. Alternatively, the number of the fourth indication information is I3, The value of p can be 0, 1, 2, or 3. When p is 0, the PUCCH resource is determined by a higher layer parameter.

[0168] In addition, in order to ensure that the payload size of the first information is the same as that of the second information, a number of reserved bit positions need to be added to the first information. As Figure 8 shown, the information field of the first information may include a frequency domain resource allocation information field, a time domain resource allocation information field, a VRB-to-PRB mapping information field, a modulation and coding scheme information field, a new data indication information field, a redundancy version information field, a HARQ process number information field, a downlink allocation index information field, a PUCCH transmission power control command information field, a PUCCH resource indication information field, a PDSCH-to-HARQ feedback timing indication information field, and reserved bit positions.

[0169] For example, the size L0 of the reserved bit positions may satisfy the following formula:

[0170] L0 = l - L + K - m - n - q - p; (Formula Seven)

[0171] Wherein, l is determined according to the width of CORESET0 and the initial BWP. Exemplarily, l satisfies Formula Four. L satisfies Formula Five. K is the sum of the sizes of the DCI format identification information field, the time domain resource allocation information field, the VRB-to-PRB mapping information field, the modulation and coding scheme information field, the new data indication information field, the redundancy version information field, the HARQ process number information field, the downlink allocation index information field, the PUCCH transmission power control command information field, the PUCCH resource indication information field, and the PDSCH-to-HARQ feedback timing indication information field in the second information. m is the size of the redundancy version information field in the first information. n is the length of the HARQ process number information field in the first information. q is the length of the PDSCH-to-HARQ feedback timing indication information field in the first information. p is the length of the PUCCH resource indication information field in the first information.

[0172] It should be understood that the above Figure 7 and / or Figure 8 The format of the first information shown may be different from DCI format 1_0, DCI format 1_1, and / or DCI format 1_2.

[0173] In this example, as Figure 7 and / or Figure 8 shown, the first information may be applied to a scenario where the terminal device does not support uplink HARQ feedback. For example, the network device 101 may send a fourth information to the terminal device, and the fourth information is used to indicate that the terminal device supports uplink HARQ feedback. Alternatively, it may be default that the terminal device supports uplink HARQ feedback.

[0174] For example, if the fourth information received by the terminal device is used to indicate support for uplink HARQ feedback, the bit positions corresponding to the DCI format identification information field in the second information are used to indicate frequency domain resource allocation in the first information. At this time, the information field structure of the first information can be as shown in Figure 7 and / or Figure 8 shown, that is, the information field of the first information consists of a frequency domain resource allocation information field, a time domain resource allocation information field, a VRB-to-PRB mapping information field, a modulation and coding scheme information field, a new data indication information field, a redundancy version information field, a HARQ process number information field, a downlink allocation index information field, a PUCCH transmission power control command information field, a PUCCH resource indication information field, and a PDSCH-to-HARQ feedback timing indication information field.

[0175] After S102, the network device 101 may send a data channel to the terminal device, and the terminal device receives the data channel according to the frequency domain resources indicated by the first information.

[0176] Based on the same inventive concept as the above method embodiments, the embodiments of the present application further provide a communication device, which may have the functions, steps, or operations of the network device or the terminal device in the above method embodiments. For example, function modules corresponding to the functions, steps, or operations in the above methods may be provided in the communication device to support the communication device in executing the above methods. This function may be implemented by hardware, or may be implemented by software or hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions. Exemplarily, the communication device may be a chip or a communication chip with a communication module, or may be implemented by a chip or a communication chip with a communication module.

[0177] In a possible implementation manner, as shown in Figure 9 the communication device 900 shown may be used as the terminal device involved in the above method embodiments and execute the steps executed by the terminal device in the above method embodiments. As shown in Figure 9 shown, the communication device 900 may include a communication module 901 and a processing module 902, and the communication module 901 and the processing module 902 are coupled to each other. The communication module 901 may be used to support the communication device 900 in communicating. The communication module 901 may have a wireless communication function, for example, it can perform wireless communication with other communication devices through a wireless air interface. The processing module 902 may be used to support the communication device 900 in executing the processing actions in the above method embodiments, including but not limited to: generating information and messages sent by the communication module 901, and / or demodulating and decoding signals received by the communication module 901, etc.

[0178] The above communication module 901 may specifically be used to execute Figure 3Actions of the terminal device for sending and / or receiving in the communication method shown. For example, the communication module 901 can be used to perform the action of the terminal device for sending information, messages or signaling to the network device, or for performing the action of receiving information, messages or signaling from the network device.

[0179] The above processing module 902 can specifically be used to perform Figure 3 The processing actions of the terminal device in the communication method shown, such as for controlling the communication module 901 to receive and / or send information, messages or signaling, and performing operations such as information processing.

[0180] Exemplarily, the processing module 902 can be used to obtain a first frequency-domain resource and a second frequency-domain resource, where the first frequency-domain resource and the second frequency-domain resource are independently configured, and the second frequency-domain resource includes CORESET0 and an initial BWP. The communication module 901 can be used to receive a first piece of information, and the first piece of information is used to schedule a downlink data channel. The first piece of information includes frequency-domain resource allocation information, and the frequency-domain resource allocation information is used to indicate the frequency-domain resource of the downlink data channel within the range of the first frequency-domain resource. The first piece of information is scrambled by a G-RNTI. Among them, the first frequency-domain resource and / or the second frequency-domain resource can be configured by the network device. The setting manner of the first piece of information can refer to the description in the method embodiment part of this application.

[0181] Exemplarily, the communication module 901 can also be used to receive a second piece of information, the second piece of information is in DCI format 1_0, and the second piece of information is scrambled by a C-RNTI. The setting manner of the second piece of information can refer to the description in the method embodiment part of this application.

[0182] The communication module 901 can also be used to receive a third piece of information from the network device. The third piece of information is used to indicate that the terminal device does not support uplink HARQ feedback. The setting manner of the third piece of information can refer to the description in the method embodiment part of this application.

[0183] In another possible implementation manner, the communication device provided in the embodiment of this application can also be composed of hardware components, such as a processor, a memory, or a transceiver, etc. For ease of understanding and convenient illustration, Figure 10 in, the possible structure of the terminal device is described by taking a mobile phone as an example. As Figure 10 shown, the communication device 1000 can include a processor 1001, a memory 1002, and a transceiver 1003.

[0184] The above processor 1001 can be used to process communication protocols and communication data, control the terminal device, execute software programs, process data of software programs, etc. The memory 1002 can be used to store programs and data, and the processor 1001 can execute the method performed by the terminal device in the embodiment of this application based on the program.

[0185] The transceiver 1003 may include a radio frequency unit and an antenna. Among them, the radio frequency unit can be used for the conversion between baseband signals and radio frequency signals and the processing of radio frequency signals. The antenna can be used for transmitting and receiving radio frequency signals in the form of electromagnetic waves. Additionally, the radio frequency unit alone can also be regarded as the transceiver 1003. In this case, the communication device 1000 may include a processor 1001, a memory 1002, a transceiver 1003, and an antenna.

[0186] In addition, the communication device 1000 may further include an input / output device 1004, such as a touch screen, a display screen, or a keyboard, which can be used to receive data input by the user and output data to the user. It should be noted that some types of communication devices may not have an input / output device.

[0187] Based on Figure 10 the above structure, when the communication device 1000 needs to send data, the processor 1001 can perform baseband processing on the data to be sent and then output a baseband signal to the radio frequency unit. The radio frequency unit performs radio frequency processing on the baseband signal and then sends the radio frequency signal in the form of electromagnetic waves through the antenna. When data is sent to the communication device 1000, the radio frequency unit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1001. The processor 1001 converts the baseband signal into data and processes the data.

[0188] Exemplarily, the processor 1001 can be used to obtain a first frequency domain resource and a second frequency domain resource. Among them, the first frequency domain resource and the second frequency domain resource are independently configured. The second frequency domain resource includes CORESET0 and an initial BWP. The communication module 901 can be used to receive a first piece of information, which is used to schedule a downlink data channel. The first piece of information includes frequency domain resource allocation information, which is used to indicate the frequency domain resource of the downlink data channel within the range of the first frequency domain resource. The first piece of information is scrambled by a G-RNTI. Among them, the first frequency domain resource and / or the second frequency domain resource can be configured by a network device. The setting method of the first piece of information can refer to the description in the method embodiment part of this application.

[0189] Exemplarily, the transceiver 1003 can also be used to receive a second piece of information, which is in DCI format 1_0 and is scrambled by a C-RNTI. The setting method of the second piece of information can refer to the description in the method embodiment part of this application.

[0190] The transceiver 1003 can also be used to receive a third piece of information from the network device. The third piece of information is used to indicate that the terminal device does not support uplink HARQ feedback. The setting method of the third piece of information can refer to the description in the method embodiment part of this application.

[0191] As shown Figure 11 in the figure, the communication device 1100 can be used as the network device involved in the above method embodiments, and execute the steps performed by the network device in the above method embodiments. As shown Figure 11 in the figure, the communication device 1100 may include a communication module 1101 and a processing module 1102, and the communication module 1101 and the processing module 1102 are coupled to each other. The communication module 1101 can be used to support the communication device 1100 to communicate. The communication module 1101 may have a wireless communication function, for example, it can perform wireless communication with other communication devices through a wireless air interface. The processing module 1102 can be used to support the communication device 1100 to execute the processing actions in the above method embodiments, including but not limited to: generating information and messages sent by the communication module 1101, and / or performing processing such as demodulation and decoding on the signals received by the communication module 1101.

[0192] Specifically, the above communication module 1101 can be used to execute the actions of the network device 101 in the communication method as shown Figure 3 in the figure. Exemplarily, the communication module 1101 can be used to execute the action of the network device 101 sending information, messages or signaling to the terminal device, or used to execute the action of receiving information, messages or signaling from the first communication device or the network device 101.

[0193] Specifically, the above processing module 1102 can be used to execute the processing actions of the network device, the third communication device and / or the fourth communication device in the communication method as shown Figure 3 in the figure, such as used to control the communication module 1101 to receive and / or send information, messages or signaling, and perform operations such as information processing.

[0194] Exemplarily, the processing module 1102 can be used to determine a first frequency domain resource and a second frequency domain resource, wherein the first frequency domain resource and the second frequency domain resource are independently configured, and the second frequency domain resource includes CORESET0 and an initial BWP. The communication module 1101 can be used to send a first piece of information to the terminal device, and the first piece of information is used to schedule the downlink data channel of the terminal device. The first piece of information includes frequency domain resource allocation information, and the frequency domain resource allocation information is used to indicate the frequency domain resource of the downlink data channel within the range of the first frequency domain resource. The first piece of information is scrambled by a G-RNTI. The setting method of the first piece of information can refer to the description in the method embodiment part of this application.

[0195] In addition, the communication module 1101 can also be used to send a second piece of information to the terminal device. The second piece of information is in DCI format 1_0, and the second piece of information is scrambled by a C-RNTI. The setting method of the second piece of information can refer to the description in the method embodiment part of this application.

[0196] The communication module 1101 may also be used to send third information to the terminal device. The third information is used to indicate that the terminal device does not support uplink HARQ feedback. The setting method of the third information may refer to the description in the method embodiment part of this application.

[0197] In another possible implementation manner, the communication device provided in the embodiments of this application may also be composed of hardware components, such as a processor, a memory, or a transceiver, etc., to implement the functions of the network device in this application.

[0198] For ease of understanding, Figure 12 the structure of the communication device is described below by taking a base station as an example. As Figure 12 shown, the communication device 1200 may include a transceiver 1201, a memory 1202, and a processor 1203 to implement the functions of the network device provided in the embodiments of this application. The transceiver 1201 may be used for the communication device to communicate. The memory 1202 is coupled to the processor 1203 and may be used to store the programs and data necessary for the communication device 1200 to implement various functions. The processor 1203 is configured to support the communication device 1200 to execute the corresponding functions of the network device in the above method, and this function may be implemented by calling the programs stored in the memory 1202.

[0199] Specifically, the transceiver 1201 may be a wireless transceiver and may be used to support the communication device 1200 to receive and send signaling and / or data through the wireless air interface. The transceiver 1201 may also be referred to as a transceiver unit or a communication unit. The transceiver 1201 may include a radio frequency unit and one or more antennas. Among them, the radio frequency unit, such as a remote radio unit (RRU), may be specifically used for the transmission of radio frequency signals and the conversion between radio frequency signals and baseband signals. The one or more antennas may be specifically used for the radiation and reception of radio frequency signals. Optionally, the transceiver 1201 may only include the above radio frequency unit. In this case, the communication device 1200 may include a transceiver 1201, a memory 1202, a processor 1203, and an antenna.

[0200] The memory 1202 and the processor 1203 may be integrated into one body or may be independent of each other. As Figure 12As shown, the memory 1202 and the processor 1203 can be integrated into the control unit 1210 of the communication device 1200. Exemplarily, the control unit 1210 may include a baseband unit (BBU) of an LTE base station, and the baseband unit may also be referred to as a digital unit (DU). Alternatively, the control unit 1210 may include a distributed unit (DU) and / or a centralized unit (CU) in a base station under 5G and future radio access technologies. The above control unit 1210 may be composed of one or more single boards. Among them, multiple single boards can jointly support a radio access network of a single access mode (such as an LTE network), and multiple single boards can also respectively support radio access networks of different access modes (such as an LTE network, a 5G network or other networks). The memory 1202 and the processor 1203 can serve one or more single boards. That is to say, the memory 1202 and the processor 1203 can be separately set on each single board. It is also possible that multiple single boards share the same memory 1202 and processor 1203. In addition, necessary circuits can be set on each single board. For example, the circuit can be used to realize the coupling of the memory 1202 and the processor 1203. The above transceiver 1201, processor 1203 and memory 1202 can be connected through a bus structure and / or other connection media.

[0201] Based on Figure 12 According to the above structure, when the communication device 1200 needs to send data, the processor 1203 can perform baseband processing on the data to be sent and then output a baseband signal to the radio frequency unit. The radio frequency unit performs radio frequency processing on the baseband signal and then sends the radio frequency signal in the form of electromagnetic waves through the antenna. When data is sent to the communication device 1200, the radio frequency unit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1203. The processor 1203 converts the baseband signal into data and processes the data.

[0202] When implementing the communication method provided in the embodiments of the present application, the processor 1203 can be used to determine a first frequency domain resource and a second frequency domain resource. Among them, the first frequency domain resource and the second frequency domain resource are independently configured, and the second frequency domain resource includes CORESET0 and an initial BWP. The transceiver 1201 can be used to send a first message to the terminal device, and the first message is used to schedule the downlink data channel of the terminal device. The first message includes frequency domain resource allocation information, and the frequency domain resource allocation information is used to indicate the frequency domain resource of the downlink data channel within the range of the first frequency domain resource. The first message is scrambled by a G-RNTI. The setting method of the first message can refer to the description in the method embodiment part of the present application.

[0203] Exemplarily, the transceiver 1201 can also be used to send a second piece of information to the terminal device. The second piece of information is DCI format 1_0, and the second piece of information is scrambled by C-RNTI. The setting method of the second piece of information can refer to the description in the method embodiment part of this application.

[0204] The transceiver 1201 can also be used to send a third piece of information to the terminal device. The third piece of information is used to indicate that the terminal device does not support uplink HARQ feedback. The setting method of the third piece of information can refer to the description in the method embodiment part of this application.

[0205] In addition, according to actual usage needs, the communication device provided in the embodiment of this application may include a processor, and the processor calls an external transceiver and / or memory to implement the above functions or steps or operations. The communication device may also include a memory, and the processor calls and executes the program stored in the memory to implement the above functions or steps or operations. Or, the communication device may also include a processor, i.e., a transceiver, and the processor calls and executes the program stored in the external memory to implement the above functions or steps or operations. Or, the communication device may also include a processor, a memory, and a transceiver.

[0206] Based on the same concept as the above method embodiment, an embodiment of this application also provides a computer-readable storage medium, on which program instructions (or computer programs, instructions) are stored. When the program instructions are executed by a processor, the computer is enabled to perform the operations performed by the network device and / or the terminal device in any possible implementation manner of the above method embodiment and the method embodiment.

[0207] Based on the same concept as the above method embodiment, this application also provides a computer program product, including program instructions. When the computer program product is called and executed by a computer, the computer can be enabled to implement the operations performed by the network device and / or the terminal device in any possible implementation manner of the above method embodiment and the method embodiment.

[0208] Based on the same concept as the above method embodiment, this application also provides a chip or a chip system. The chip is coupled to a transceiver and is used to implement the operations performed by the network device and / or the terminal device in any possible implementation manner of the above method embodiment and the method embodiment. The chip system may include the chip, as well as components including a memory, a communication interface, etc.

[0209] Based on the same concept as the above method embodiment, this application also provides a communication system, which can be used to implement the operations performed by the network device and / or the terminal device in any possible implementation manner of the above method embodiment and the method embodiment. Exemplarily, the communication system has a structure as Figure 1 shown.

[0210] TakingFigure 1 Taking the communication system shown as an example, the network device 101 can be used to determine the first frequency domain resource and the second frequency domain resource. Among them, the first frequency domain resource and the second frequency domain resource are independently configured, and the second frequency domain resource includes CORESET0 and the initial BWP. The terminal device can obtain the first frequency domain resource and the second frequency domain resource. In addition, the network device 101 can also send the first information to the terminal device, and the first information is used to schedule the downlink data channel of the terminal device. Correspondingly, the terminal device can receive the first information. The setting method of the first information can refer to the introduction in the method embodiment part of this application.

[0211] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0212] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, and the combination of the flows and / or blocks in the flowchart and / or block diagram can also be implemented. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for realizing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0213] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured product including an instruction device, and the instruction device realizes the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0214] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide for realizing the functions in Figure 1 one process or multiple processes and / or blocksFigure 1 Steps of the functions specified in one or more boxes.

[0215] Obviously, those skilled in the art can make various changes and modifications to this application without departing from the scope of protection of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these changes and modifications.

Claims

1. A communication method, applied to a terminal device or a chip in the terminal device, characterized in that, including: obtaining a first frequency-domain resource and a second frequency-domain resource, where the first frequency-domain resource and the second frequency-domain resource adopt different signaling configurations, and the second frequency-domain resource includes a control resource set CORESET0 and / or an initial partial bandwidth BWP; receiving first information for scheduling a downlink data channel; the first information includes frequency-domain resource allocation information for indicating the frequency-domain resource of the downlink data channel within the range of the first frequency-domain resource, and the first information is scrambled by a group radio network temporary identity G-RNTI.

2. The method according to claim 1, wherein The downlink data channel is a multicast data channel.

3. The method according to claim 1, wherein The first information does not include an information field of at least one of the following information: new data indication; or, redundancy version; or, hybrid automatic repeat request HARQ process number; or, downlink allocation index; or, physical uplink control channel PUCCH transmission power control command; or, PUCCH resource indication; or, physical downlink shared channel PDSCH to HARQ feedback timing indication.

4. The method according to claim 1, wherein The first information does not include downlink control information DCI format identification information for indicating an uplink or downlink DCI format.

5. The method according to claim 1, wherein The method further includes: receiving second information, where the second information is DCI format 1_0 and is scrambled by a cell radio network temporary identity C-RNTI; The second information includes information fields of the following information: DCI format identification; frequency-domain resource allocation; time-domain resource allocation; virtual resource block VRB to physical resource block PRB mapping; modulation and coding mode; new data indication; redundancy version; HARQ process number; downlink allocation index; PUCCH transmission power control command; PUCCH resource indication; PDSCH to HARQ feedback timing indication.

6. The method according to claim 5, characterized in that, The payload size of the first information is the same as the payload size of the second information; and / or, The DCI format of the first information is the same as the DCI format of the second information.

7. The method according to claim 5, wherein The bit position corresponding to the first information field in the first information is used in the first information to indicate the frequency-domain resource of the downlink data channel, and the first information field is the information field in the second information.

8. The method according to claim 7, wherein The first information field is an information field of at least one of the following information: DCI format identification; or, new data indication; or, redundancy version; or, HARQ process number; or, downlink allocation index; or, PUCCH transmission power control command; or, PUCCH resource indication; or, PDSCH to HARQ feedback timing indication.

9. The method according to claim 7, wherein The first information field is an information field of at least one of the following information: new data indication; or, redundancy version; or, HARQ process number; or, downlink allocation index; or, PUCCH transmission power control command; or, PUCCH resource indication; or, PDSCH to HARQ feedback timing indication; The method further includes: receiving third information from a network device, where the third information is used to indicate that the terminal device does not support uplink HARQ feedback.

10. The method according to any one of claims 1-9, characterized in that, The size of the frequency-domain resource information field in the first information is associated with the first frequency-domain resource.

11. A communication method, applied to a network device or a chip in the network device, characterized in that, Including: Configuring a first frequency-domain resource and a second frequency-domain resource, where the first frequency-domain resource and the second frequency-domain resource adopt different signaling configurations, and the second frequency-domain resource includes CORESET0 and / or an initial BWP; Sending first information, where the first information is used to schedule a terminal device to send a downlink data channel; the first information includes frequency-domain resource allocation information, and the frequency-domain resource allocation information is used to indicate the frequency-domain resource of the downlink data channel within the range of the first frequency-domain resource, and the first information is scrambled by a G-RNTI.

12. The method according to claim 11, wherein The downlink data channel is a multicast data channel.

13. The method according to claim 11, characterized in that, The first information does not include the information field of at least one of the following information: New data indication; or, Redundancy version; or, HARQ process number; or, Downlink allocation index; or, PUCCH transmission power control command; or, PUCCH resource indication; or, PDSCH to HARQ feedback timing indication.

14. The method according to claim 11, wherein The first information does not include DCI format identification information, and the DCI format identification information is used to indicate an uplink or downlink DCI format.

15. The method according to claim 11, wherein The method further includes: Sending second information, where the second information is DCI format 1_0, and the second information is scrambled by a C-RNTI; The second information includes the information fields of the following information: DCI format identification; Frequency-domain resource allocation; Time-domain resource allocation; VRB to PRB mapping; Modulation and coding scheme; New data indication; Redundancy version; HARQ process number; Downlink allocation index; PUCCH transmission power control command; PUCCH resource indication; PDSCH to HARQ feedback timing indication.

16. The method according to claim 15, wherein The payload size of the first information is the same as the payload size of the second information; and / or, The DCI format of the first information is the same as the DCI format of the second information.

17. The method according to claim 15, characterized in that, The bit positions corresponding to the first information field in the first information are used in the first information to indicate the frequency-domain resource of the downlink data channel, and the first information field is the information field in the second information.

18. The method according to claim 17, wherein The first information field is the information field of at least one of the following information: DCI format identification; or, New data indication; or, Redundancy version; or, HARQ process number; or, Downlink allocation index; or, PUCCH transmission power control command; or, PUCCH resource indication; or, PDSCH to HARQ feedback timing indication.

19. The method according to claim 17, wherein The first information field includes the information field of at least one of the following information: New data indication; or, Redundancy version; or, HARQ process number; or, Downlink allocation index; or, PUCCH transmission power control command; Or, PUCCH resource indication; or, PDSCH to HARQ feedback timing indication; The method further includes: Sending third information, where the third information is used to indicate that the terminal device does not support uplink HARQ feedback.

20. The method according to any one of claims 11-19, characterized in that The size of the frequency-domain resource information field in the first information is associated with the first frequency-domain resource.

21. A communication device, characterized in that, Including: A transceiver for the communication device to communicate; A processor for executing program instructions stored in a memory and performing the method according to any one of claims 1-10.

22. A communication device, characterized in that, Comprising: A transceiver for the communication device to communicate; A processor for executing program instructions stored in a memory and performing the method according to any one of claims 11-20.

23. A communication system, characterized in that, Comprising the communication device according to claim 21 and including the communication device according to claim 20.

24. A computer-readable storage medium, characterized in that, Comprising program instructions that, when run on a communication device, cause the communication device to perform the method according to any one of claims 1-20.

25. A computer program product, characterized in that, Comprising program instructions that, when run on a communication device, cause the communication device to perform the method according to any one of claims 1-20.

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