A method and device for transmitting downlink control information DCI

Abstract

The embodiment of the present application discloses a method and device for transmitting downlink control information DCI, which can be applied to long term evolution (LTE) system, fifth generation (5G) mobile communication system, 5G new radio (NR) and other systems, and the method includes: a terminal device receives the common frequency domain resource configuration of a network device; according to the common frequency domain resource configuration, it is determined how to detect and receive the DCI for scheduling multicast scheduling MBS services. By implementing the embodiment of the present application, a method for determining the DCI for receiving scheduling multicast scheduling MBS services can be determined according to the common frequency domain resource (CFR) configuration. In this way, detection errors can be avoided and transmission efficiency can be improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a method and device for transmitting downlink control information DCI. Background Art

[0002] In wireless communication, a terminal device receives PDCCH through a dedicated bandwidth part (Bandwith Part, BWP) configured by a network device, and determines specific attributes of downlink control information (Downlink control information, DCI) according to information such as the type of search space determined by the network device configuration. Summary of the invention

[0003] The embodiment of the present application provides a method and device for transmitting downlink control information DCI, which can be applied to the fields of long term evolution (LTE) system, fifth generation (5G) mobile communication system, 5G new radio (NR) system, etc., and realizes a method for determining the DCI of receiving scheduling multicast scheduling MBS service according to the common frequency resource (CFR) configuration. In this way, detection errors can be avoided and transmission efficiency can be improved.

[0004] In a first aspect, an embodiment of the present application provides a method for transmitting downlink control information DCI, the method comprising:

[0005] How to detect and receive the DCI for scheduling multicast scheduling MBS services is determined based on the public frequency domain resource configuration of the network device.

[0006] In this technical solution, a method for determining the DCI for receiving the multicast scheduling MBS service according to the common frequency resource (CFR) configuration is implemented. In this way, detection errors can be avoided and transmission efficiency can be improved.

[0007] Optionally, the determining how to detect and receive the DCI of the scheduled multicast scheduled MBS service based on the public frequency domain resource configuration of the network device includes:

[0008] In response to receiving a common frequency domain resource configuration from a network device, wherein the common frequency domain resource configuration includes a control resource set or a search space, the DCI for scheduling the MBS service is detected and received according to the common frequency domain resource configuration.

[0009] The method for receiving the DCI for scheduling the multicast scheduling MBS service is determined according to the common frequency resource (CFR) configuration. In this way, detection errors can be avoided and transmission efficiency can be improved.

[0010] Optionally, the determining how to detect and receive the DCI for scheduling the multicast scheduling MBS service based on the public frequency domain resource configuration of the network device further includes:

[0011] In response to not receiving a common frequency domain resource configuration from a network device, or receiving a common frequency domain resource configuration from a network device but there is no corresponding search space configuration within the common frequency domain resources, and a set of control resources for non-MBS data transmission is completely included in the common frequency domain resource configuration, it is determined how to detect and receive the DCI for scheduling the MBS service according to a predefined method or wireless resource control RRC signaling.

[0012] Optionally, the determining, according to a predefined method, how to detect and receive the DCI for scheduling the MBS service includes:

[0013] Determine a search space within the activated bandwidth portion, and determine a size of the DCI for scheduling the MBS service;

[0014] How to detect and receive the DCI that schedules the MBS service is determined according to the search space and the size of the DCI that schedules the MBS service.

[0015] Optionally, determining the search space within the activation bandwidth portion includes:

[0016] The network device is configured with an MBS terminal group, and determines the search space according to a common search space CSS configured in the bandwidth part.

[0017] Optionally, determining the search space according to a common search space CSS configured in the bandwidth part includes:

[0018] A common search space CSS having a predefined number is determined as the search space.

[0019] Optionally, the determining a common search space CSS with a predefined number as the search space includes at least one of the following:

[0020] Determine the search space according to the highest number of the common search space CSS;

[0021] The search space is determined according to the lowest number of the common search space CSS.

[0022] Optionally, the determining the search space within the activation bandwidth portion further includes:

[0023] The network device is configured with an MBS terminal group, and determines the search space according to a terminal-specific search space USS configured in the bandwidth part.

[0024] Optionally, the determining the search space according to a terminal-specific search space USS configured in the bandwidth part includes:

[0025] A USS with a predefined number is determined as the search space.

[0026] Optionally, the determining a USS with a predefined number as the search space includes at least one of the following:

[0027] Determine the search space according to the highest number of the terminal-specific search space USS;

[0028] The search space is determined according to a lowest number of the terminal-specific search space USS.

[0029] Optionally, the determining, according to the RRC signaling, how to detect and receive the DCI for scheduling the MBS service includes:

[0030] The search space in the activated bandwidth part is determined according to the search space number in the RRC signaling.

[0031] Optionally, the determining the size of the DCI for scheduling the MBS service includes:

[0032] The DCI for scheduling the MBS service is transmitted in the corresponding common search space CSS, and the CSS type is Type0 / 0a / 1 / 2, then determining the size of the MBS service scheduling DCI to be the effective load size of the first DCI format in the CSS;

[0033] The first DCI format includes at least one of the following: DCI format format 1_0 scrambled by system message radio network temporary identifier SI-RNTI, DCI format format 1_0 scrambled by random access radio network temporary identifier RA-RNTI, DCI format format 1_0 scrambled by temporary cell radio network temporary identifier TC-RNTI, and DCI format format 1_0 scrambled by paging radio network temporary identifier P-RNTI.

[0034] Optionally, the determining the size of the DCI for scheduling the MBS service further includes:

[0035] The DCI for scheduling the MBS service is transmitted in a corresponding common search space CSS, and the CSS is a CSS of type Type 3, then determining that the size of the MBS service scheduling DCI is the effective load size of the second DCI format in the CSS;

[0036] The second DCI format includes at least one of the following: DCI format 2_0, DCI format 2_1, DCI format 2_2, DCI format 2_3, DCI format 2_4, DCI format 2_5, and DCI format 2_6.

[0037] Optionally, the determining the size of the DCI for scheduling the MBS service further includes:

[0038] The DCI for scheduling the MBS service is transmitted in the USS, and the size of the MBS service scheduling DCI is determined to be the effective load size of DCI format 1_1 and / or DCI format 1_2 in the USS.

[0039] Optionally, the determining, according to the search space and the size of the DCI for scheduling the MBS service, how to detect and receive the DCI for scheduling the MBS service includes:

[0040] Determine a PDCCH candidate in a common search space CSS in the activated bandwidth part according to the size of the DCI for scheduling the MBS service, and detect and receive the DCI for scheduling the MBS service on all PDCCH candidates included in the CSS; or

[0041] The PDCCH candidates are determined in a common search space CSS in the activated bandwidth part according to the size of the DCI scheduling the MBS service, and the DCI scheduling the MBS service is detected and received on a part of the PDCCH candidates included in the CSS.

[0042] Optionally, the detecting and receiving DCI for scheduling the MBS service on some of the PDCCH candidates included in the CSS includes:

[0043] Detecting and receiving the DCI for scheduling the MBS service on predefined N PDCCH candidates, where N is a positive integer; or

[0044] The DCI for scheduling the MBS service is detected and received on the PDCCH candidate indicated by the RRC signaling configuration.

[0045] Optionally, the determining, according to the search space and the size of the DCI for scheduling the MBS service, how to detect and receive the DCI for scheduling the MBS service includes:

[0046] Determine a PDCCH candidate in a terminal-specific search space USS in the activated bandwidth part according to the size of the DCI for scheduling the MBS service, and detect and receive the DCI for scheduling the MBS service on all PDCCH candidates included in the USS; or

[0047] The PDCCH candidate is determined in a terminal-specific search space USS in the activated bandwidth part according to the size of the DCI for scheduling the MBS service, and the DCI for scheduling the MBS service is detected and received on a portion of the PDCCH candidates included in the USS.

[0048] Optionally, the detecting and receiving a DCI for scheduling the MBS service on a portion of the PDCCH candidates included in the USS includes:

[0049] Detecting and receiving the DCI for scheduling the MBS service on predefined N PDCCH candidates, where N is a positive integer; or

[0050] The DCI for scheduling the MBS service is detected and received on the PDCCH candidate indicated by the RRC signaling configuration.

[0051] In a second aspect, an embodiment of the present application provides another method for transmitting downlink control information DCI, the method comprising:

[0052] Sending public frequency domain resource configuration to the terminal device;

[0053] How to send the DCI for scheduling the multicast scheduling MBS service is determined according to the common frequency domain resource configuration.

[0054] In a possible implementation manner, determining how to send a DCI for scheduling a multicast scheduling MBS service according to the common frequency domain resource configuration includes:

[0055] The common frequency domain resource configuration includes a control resource set or a search space, and the DCI for scheduling the MBS service is sent according to the common frequency domain resource configuration.

[0056] In a possible implementation manner, the determining, according to the common frequency domain resource configuration, how to send the DCI for scheduling the multicast MBS service further includes:

[0057] If the public frequency domain resource configuration is not sent or the public frequency domain resource does not contain the corresponding search space configuration, and the control resource set for non-MBS data transmission is completely contained in the public frequency domain resource configuration, then how to send the DCI for scheduling the MBS service is determined according to a predefined method or wireless resource control RRC signaling.

[0058] In a possible implementation manner, determining how to send the DCI for scheduling the MBS service according to a predefined method includes:

[0059] Determine a search space within the activated bandwidth portion, and determine a size of the DCI for scheduling the MBS service;

[0060] How to send the DCI for scheduling the MBS service is determined according to the search space and the size of the DCI for scheduling the MBS service.

[0061] In a possible implementation manner, determining a search space within the activation bandwidth portion includes:

[0062] An MBS terminal group is configured, and the terminal device belongs to the terminal group, and the search space is determined according to a common search space CSS configured in the bandwidth part.

[0063] In a possible implementation manner, determining the search space according to a common search space CSS configured in the bandwidth part includes:

[0064] A common search space CSS having a predefined number is determined as the search space.

[0065] In a possible implementation manner, determining a common search space CSS with a predefined number as the search space includes at least one of the following:

[0066] Determine the search space according to the highest number of the common search space CSS;

[0067] The search space is determined according to the lowest number of the common search space CSS.

[0068] In a possible implementation manner, determining the search space within the activation bandwidth portion further includes:

[0069] The network device is configured with an MBS terminal group, and determines the search space according to a terminal-specific search space USS configured in the bandwidth part.

[0070] In a possible implementation manner, determining the search space according to a terminal-specific search space USS configured in the bandwidth part includes:

[0071] A USS with a predefined number is determined as the search space.

[0072] In a possible implementation manner, the determining the USS with a predefined number as the search space includes at least one of the following:

[0073] Determine the search space according to the highest number of the terminal-specific search space USS;

[0074] The search space is determined according to a lowest number of the terminal-specific search space USS.

[0075] In a possible implementation manner, the determining, according to the RRC signaling, how to send the DCI for scheduling the MBS service includes:

[0076] The search space in the activated bandwidth part is determined according to the search space number in the RRC signaling.

[0077] In a possible implementation manner, determining the size of the DCI for scheduling the MBS service includes:

[0078] The DCI for scheduling the MBS service is transmitted in the corresponding common search space CSS, and the CSS type is Type0 / 0a / 1 / 2, then determining the size of the MBS service scheduling DCI to be the effective load size of the first DCI format in the CSS;

[0079] The first DCI format includes at least one of the following: DCI format format 1_0 scrambled by system message radio network temporary identifier SI-RNTI, DCI format format 1_0 scrambled by random access radio network temporary identifier RA-RNTI, DCI format format 1_0 scrambled by temporary cell radio network temporary identifier TC-RNTI, and DCI format format 1_0 scrambled by paging radio network temporary identifier P-RNTI.

[0080] In a possible implementation manner, the determining the size of the DCI for scheduling the MBS service further includes:

[0081] The DCI for scheduling the MBS service is transmitted in a corresponding common search space CSS, and the CSS is a CSS of type Type 3, then determining that the size of the MBS service scheduling DCI is the effective load size of the second DCI format in the CSS;

[0082] The second DCI format includes at least one of the following: DCI format 2_0, DCI format 2_1, DCI format 2_2, DCI format 2_3, DCI format 2_4, DCI format 2_5, and DCI format 2_6.

[0083] In a possible implementation manner, the determining the size of the DCI for scheduling the MBS service further includes:

[0084] The DCI for scheduling the MBS service is transmitted in the USS, and the size of the MBS service scheduling DCI is determined to be the effective load size of DCI format 1_1 and / or DCI format 1_2 in the USS.

[0085] In a possible implementation manner, the determining, according to the search space and the size of the DCI for scheduling the MBS service, how to send the DCI for scheduling the MBS service includes:

[0086] Determine a PDCCH candidate in a common search space CSS in the activated bandwidth part according to the size of the DCI for scheduling the MBS service, and send the DCI for scheduling the MBS service on all PDCCH candidates included in the CSS; or

[0087] The PDCCH candidates are determined in a common search space CSS in the activated bandwidth part according to the size of the DCI for scheduling the MBS service, and the DCI for scheduling the MBS service is sent on a portion of the PDCCH candidates included in the CSS.

[0088] In a possible implementation manner, sending the DCI for scheduling the MBS service on some of the PDCCH candidates included in the CSS includes:

[0089] Sending the DCI for scheduling the MBS service on predefined N PDCCH candidates, where N is a positive integer; or

[0090] The DCI for scheduling the MBS service is sent on the PDCCH candidate indicated by the RRC signaling configuration.

[0091] In a possible implementation manner, the determining, according to the search space and the size of the DCI for scheduling the MBS service, how to send the DCI for scheduling the MBS service includes:

[0092] Determine a PDCCH candidate in a terminal-specific search space USS in the activated bandwidth part according to the size of the DCI for scheduling the MBS service, and send the DCI for scheduling the MBS service on all PDCCH candidates included in the USS; or

[0093] The PDCCH candidates are determined in a terminal-specific search space USS in the activated bandwidth part according to the size of the DCI for scheduling the MBS service, and the DCI for scheduling the MBS service is sent on a portion of the PDCCH candidates included in the USS.

[0094] In a possible implementation manner, the sending the DCI for scheduling the MBS service on part of the PDCCH candidates included in the USS includes:

[0095] Sending the DCI for scheduling the MBS service on predefined N PDCCH candidates, where N is a positive integer; or

[0096] The DCI for scheduling the MBS service is sent on the PDCCH candidate indicated by the RRC signaling configuration.

[0097] In a third aspect, an embodiment of the present application provides a communication device, which has some or all of the functions of the terminal device in the method described in the first aspect above. For example, the functions of the communication device may have some or all of the functions in the embodiments of the present application, or may have the functions of implementing any one of the embodiments of the present application separately. The functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0098] In one implementation, the structure of the communication device may include a transceiver module and a processing module, and the processing module is configured to support the communication device to perform the corresponding functions in the above method. The transceiver module is used to support communication between the communication device and other devices. The communication device may also include a storage module, which is used to couple with the transceiver module and the processing module, and store the computer programs and data necessary for the communication device.

[0099] In one implementation, the communication device includes:

[0100] The processing module is used to determine how to detect and receive the DCI of the scheduling multicast scheduling MBS service based on the public frequency domain resource configuration of the network device.

[0101] In a fourth aspect, an embodiment of the present application provides another communication device, which has some or all of the functions of the network device in the method example described in the second aspect above, such as the functions of the communication device may have some or all of the functions in the embodiments of the present application, or may have the functions of implementing any one of the embodiments of the present application separately. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0102] In one implementation, the structure of the communication device may include a transceiver module and a processing module, and the processing module is configured to support the communication device to perform the corresponding functions in the above method. The transceiver module is used to support communication between the communication device and other devices. The communication device may also include a storage module, which is used to couple with the transceiver module and the processing module, and store the computer programs and data necessary for the communication device.

[0103] In one implementation, the communication device includes:

[0104] A sending module, used for sending a common frequency domain resource configuration to a terminal device;

[0105] The processing module is used to determine how to send the DCI for scheduling multicast scheduling MBS services according to the public frequency domain resource configuration.

[0106] In a fifth aspect, an embodiment of the present application provides a communication device, which includes a processor. When the processor calls a computer program in a memory, the method described in the first aspect is executed.

[0107] In a sixth aspect, an embodiment of the present application provides a communication device, which includes a processor. When the processor calls a computer program in a memory, the method described in the second aspect is executed.

[0108] In the seventh aspect, an embodiment of the present application provides a communication device, which includes a processor and a memory, in which a computer program is stored; the processor executes the computer program stored in the memory so that the communication device executes the method described in the first aspect above.

[0109] In an eighth aspect, an embodiment of the present application provides a communication device, which includes a processor and a memory, in which a computer program is stored; the processor executes the computer program stored in the memory so that the communication device executes the method described in the second aspect above.

[0110] In a ninth aspect, an embodiment of the present application provides a communication device, which includes a processor and an interface circuit, wherein the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to enable the device to execute the method described in the first aspect above.

[0111] In the tenth aspect, an embodiment of the present application provides a communication device, which includes a processor and an interface circuit, the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to enable the device to execute the method described in the second aspect above.

[0112] In the eleventh aspect, an embodiment of the present application provides a system for transmitting downlink control information DCI, the system comprising the communication device described in the third aspect and the communication device described in the fourth aspect, or the system comprising the communication device described in the fifth aspect and the communication device described in the sixth aspect, or the system comprising the communication device described in the seventh aspect and the communication device described in the eighth aspect, or the system comprising the communication device described in the ninth aspect and the communication device described in the tenth aspect.

[0113] In a twelfth aspect, an embodiment of the present invention provides a computer-readable storage medium for storing instructions for the above-mentioned terminal device, and when the instructions are executed, the terminal device executes the method described in the first aspect.

[0114] In a thirteenth aspect, an embodiment of the present invention provides a readable storage medium for storing instructions used by the above-mentioned network device, and when the instructions are executed, the network device executes the method described in the above-mentioned second aspect.

[0115] In a fourteenth aspect, the present application also provides a computer program product comprising a computer program, which, when executed on a computer, enables the computer to execute the method described in the first aspect above.

[0116] In a fifteenth aspect, the present application also provides a computer program product comprising a computer program, which, when executed on a computer, enables the computer to execute the method described in the second aspect above.

[0117] In a sixteenth aspect, the present application provides a chip system, which includes at least one processor and an interface, for supporting a terminal device to implement the functions involved in the first aspect, for example, determining or processing at least one of the data and information involved in the above method. In one possible design, the chip system also includes a memory, which is used to store computer programs and data necessary for the terminal device. The chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0118] In the seventeenth aspect, the present application provides a chip system, which includes at least one processor and an interface, and is used to support the network device to implement the functions involved in the second aspect, for example, determining or processing at least one of the data and information involved in the above method. In one possible design, the chip system also includes a memory, and the memory is used to store computer programs and data necessary for the network device. The chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0119] In an eighteenth aspect, the present application provides a computer program which, when executed on a computer, enables the computer to execute the method described in the first aspect above.

[0120] In a nineteenth aspect, the present application provides a computer program which, when executed on a computer, enables the computer to execute the method described in the second aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0121] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0122] Figure 1 It is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application;

[0123] Figure 2 It is a flowchart of a method for transmitting downlink control information DCI provided in an embodiment of the present application;

[0124] Figure 3 It is a flowchart of a method for transmitting downlink control information DCI provided in an embodiment of the present application;

[0125] Figure 4 It is a flowchart of a method for transmitting downlink control information DCI provided in an embodiment of the present application;

[0126] Figure 5 is a structural diagram of a communication device provided in an embodiment of the present application;

[0127] Figure 6 is a structural diagram of a communication device provided in an embodiment of the present application;

[0128] Figure 7 It is a schematic diagram of the structure of a chip provided in an embodiment of the present application. DETAILED DESCRIPTION

[0129] To facilitate understanding, the terms involved in this application are first introduced.

[0130] 1. Downlink control information (DCI)

[0131] DCI is carried by a physical downlink control channel (PDCCH), and DCI may include uplink and downlink resource allocation, hybrid automatic repeat request (HARQ) information, power control, etc. PDCCH is a physical channel used to carry downlink scheduling information.

[0132] 2. Scrambling

[0133] Scrambling is a method of processing digital signals, which uses a scrambling code to perform an XOR operation with the original signal to obtain a new signal. Usually, the function of uplink physical channel scrambling is to distinguish different terminal devices, and downlink scrambling can distinguish between cells and channels. Among them, the scrambling code can be used to scramble and descramble the original signal. For example, the scrambling code can scramble the downlink control information (DCI), or it can also be called PDCCH scrambling. Scrambling DCI can specifically refer to scrambling the cyclic redundancy check (CRC) field of DCI. Accordingly, the terminal device descrambles the received DCI, which specifically refers to the terminal device descrambling the CRC field of DCI using a corresponding type of scrambling code to determine the format or type of DCI, etc.

[0134] The scrambling code may include, but is not limited to, a cell radio network temporary identifier (C-RNTI), a temporary cell radio network temporary identifier (TC-RNTI), a random access radio network temporary identifier (RA-RNTI), a system information radio network temporary identifier (SI-RNTI) and a paging radio network temporary identifier (P-RNTI).

[0135] a) C-RNTI and TC-RNTI

[0136] If the terminal device is in the radio resource control connected (RRC-connected) state, it means that the terminal device has been assigned a C-RNTI, and the terminal device needs to carry the C-RNTI when initiating a random access request to the network device. If the terminal device is in the RRC idle (RRC idle) state or the RRC inactive (RRCinactive) state, it means that the terminal device has not been assigned a C-RNTI. If the terminal device requests an RRC connection, the network device may allocate a temporary C-RNTI to the terminal device in the subsequent response information, recorded as TC-RNTI. After the terminal device successfully accesses the random access, the TC-RNTI can be converted to C-RNTI.

[0137] b)RA-RNTI

[0138] In the random access process, the generation of RA-RNTI is related to the time-frequency resources used by the terminal device to send the preamble. For example, when terminal device A and terminal device B use the same random access channel time-frequency resources to initiate random access, the corresponding RA-RNTI is the same.

[0139] 3. Search space (SS)

[0140] In the 5G NR system, due to the large bandwidth of the system and the differences in terminal demodulation capabilities, in order to improve resource utilization and reduce the complexity of blind decoding (BD), PDCCH no longer occupies the entire bandwidth in the frequency domain. At the same time, in order to increase system flexibility and adapt to different scenarios, the starting position of PDCCH in the time domain can also be configured. Therefore, in 5G NR, the UE needs to fully obtain the time and frequency domain resource configuration information of PDCCH before it can further demodulate the PDCCH. In related technologies, information such as the frequency domain resource information of PDCCH and the number of orthogonal frequency division multiplexing (OFDM) symbols occupied in the time domain are encapsulated in the control resource set (CORESET), and information such as the starting OFDM symbol of PDCCH, the monitoring period, and the associated CORESET are encapsulated in the search space.

[0141] The search space is divided into two types, Common Search Space (CSS) and UE Specific Search Space (USS); CSS is mainly used during access and cell switching, while USS is used after access.

[0142] 4. Multi-broadcast scheduling (MBS)

[0143] MBS is an important function of a wireless communication system defined by the IEEE802.16e protocol. MBS is divided into two situations: single base station access and multi-base station access. The single base station access refers to the multicast broadcast service within a base station, and the multi-base station access means that all terminals registered to the multicast broadcast content at the network level can receive the multicast broadcast service transmitted synchronously on the downlink connection by all base stations under the multicast broadcast service area.

[0144] In order to better understand a method for transmitting downlink control information DCI disclosed in an embodiment of the present application, a communication system to which the embodiment of the present application is applicable is first described below.

[0145] See also Figure 1 , Figure 1 The present invention provides a schematic diagram of the architecture of a communication system. The communication system may include but is not limited to a network device and a terminal device. Figure 1 The number and form of devices shown are for illustrative purposes only and do not constitute a limitation on the embodiments of the present application. In actual applications, two or more network devices and two or more terminal devices may be included. Figure 1 The communication system shown includes a network device 101 and a terminal device 102 as an example.

[0146] It should be noted that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as long term evolution (LTE) system, fifth generation (5G) mobile communication system, 5G new radio (NR) system, or other future new mobile communication systems.

[0147] The network device 101 in the embodiment of the present application is an entity of the network device for transmitting or receiving signals. For example, the network device 101 may be an evolved NodeB (eNB), a transmission point (TRP), a next generation NodeB (gNB) in an NR system, a base station in other future mobile communication systems, or an access node in a wireless fidelity (WiFi) system. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device. The network device provided in the embodiment of the present application may be composed of a centralized unit (CU) and a distributed unit (DU), wherein the CU may also be referred to as a control unit. The CU-DU structure may be used to split the protocol layer of the network device, such as the base station, and the functions of some protocol layers are placed in the CU for centralized control, and the functions of the remaining part or all of the protocol layers are distributed in the DU, and the DU is centrally controlled by the CU.

[0148] The terminal device 102 in the embodiment of the present application is an entity for receiving or transmitting signals on the user side, such as a mobile phone. The terminal device can also be called a terminal device (terminal), a user equipment (UE), a mobile station (MS), a mobile terminal device (MT), etc. The terminal device can be a car with communication function, a smart car, a mobile phone, a wearable device, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation safety (transportation safety), a wireless terminal device in smart city (smart city), a wireless terminal device in smart home (smart home), etc. The embodiment of the present application does not limit the specific technology and specific device form adopted by the terminal device.

[0149] In the research of Rel-17 MBS project, it is determined that if common frequency resource (CFR) is configured, corresponding configuration parameters need to be configured for the CFR, such as physical downlink shared channel configuration (PDSCH-config) is used to determine the transmission parameters related to PDSCH configured for transmission in CFR, and PDCCH-config is used to determine the transmission parameters related to PDCCH configured for transmission in CFR, etc. However, when the network device does not configure CFR for the terminal in the bandwidth part (Bandwith Part, BWP), how to determine the relevant parameters of downlink transmission, especially how to determine the transmission method of the downlink control channel, there is currently no corresponding method. Considering that BWP is a terminal-level configuration, there is no corresponding configuration related to the group. If the BWP without CFR is also used for MBS transmission, it is necessary to make the terminals in the group have the same understanding of PDCCH transmission, such as PDCCH transmission resources, DCI size, etc.

[0150] For a terminal in a CONNECTED state, the network device configures a user equipment-specific (UE-specific) BWP for the terminal. The relevant configuration parameters of the BWP can only be known by the target terminal and cannot be shared between terminals. The configuration parameters of the BWP include a set of parameters related to downlink transmission, such as PDSCH-config and PDCCH-config. For example, the search space type, search space number, and CORESET-related configuration used by the terminal to detect and receive PDCCH in the BWP are known through PDCCH-config. The terminal detects and receives PDCCH in the BWP according to the relevant configuration of the PDCCH. At the same time, when detecting and receiving PDCCH, the size of the DCI is determined according to factors such as the type of search space, the size of the active BWP or the initial BWP, etc.

[0151] It should be noted that the BWP configurations of different terminals may be different, and the BWP configurations are isolated from each other between terminals, that is, a terminal can only obtain its own BWP configuration parameters, but cannot obtain the BWP configuration parameters of other terminals.

[0152] When a network device transmits MBS services on a BWP without CFR, since the current mechanism does not support sharing of UE-dedicated configurations between different terminals, the network device cannot determine in which search space the DCI should be transmitted, which physical downlink control channel candidate PDCCH candidate in the search space to transmit the DCI, and which downlink control information alignment DCI alignment strategy to use to transmit the DCI. Correspondingly, the terminal device can only obtain the relevant configuration parameters corresponding to the terminal. It is impossible to determine when and how to detect and receive the downlink control channel corresponding to the MBS.

[0153] In the related art, the relevant configuration parameters of CFR include the necessary information required for PDCCH and PDSCH transmission. Terminals belonging to the same MBS group can know how to detect and receive PDCCH in CFR according to the CFR parameters. According to the scheduling information carried by PDCCH, it is known how to detect and receive PDSCH. However, when CFR is not configured in the BWP, there is currently no way to ensure that the network side and the terminal side have the same understanding of the reception of MBS PDCCH, so that the transmission of MBS services cannot be successfully completed.

[0154] It can be understood that the communication system described in the embodiment of the present application is for more clearly illustrating the technical solution of the embodiment of the present application, and does not constitute a limitation on the technical solution provided in the embodiment of the present application. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

[0155] The method and device for transmitting downlink control information DCI provided in the present application are described in detail below in conjunction with the accompanying drawings.

[0156] The embodiment of the present application provides a method for transmitting downlink control information DCI, which is used for a terminal device. The method includes:

[0157] How to detect and receive the DCI for scheduling multicast scheduling MBS services is determined based on the public frequency domain resource configuration of the network device.

[0158] In the embodiment of the present application, a terminal device receives the common frequency domain resource CFR configuration sent by the network device, and determines a method for detecting and receiving the DCI for scheduling multicast scheduling MBS services, that is, the multicast scheduling service-specific downlink control information MBS-specific DCI according to the CFR configuration.

[0159] In an embodiment of the present application, a terminal device receives a common frequency domain resource CFR configuration sent by the network device. If the terminal device receives the CFR configuration and the CFR configuration includes a control resource set or a search space, the terminal device detects and receives the DCI for scheduling the MBS service according to the common frequency domain resource configuration.

[0160] If the terminal device does not receive the CFR configuration, or receives the CFR configuration and the CFR configuration does not include the control resource set or search space, it is necessary to determine the search space in the activated bandwidth part active BWP and the size of the DCI for scheduling the MBS service according to a predefined method, and determine how to detect and receive the DCI for scheduling the MBS service based on the search space and the size of the DCI for scheduling the MBS service.

[0161] By implementing the embodiment of the present application, a method for receiving DCI for scheduling multicast scheduling MBS services can be determined according to the CFR configuration. In this way, detection errors can be avoided and transmission efficiency can be improved.

[0162] Optionally, the determining how to detect and receive the DCI of the scheduled multicast scheduled MBS service based on the public frequency domain resource configuration of the network device includes:

[0163] In response to receiving a common frequency domain resource configuration from a network device, wherein the common frequency domain resource configuration includes a control resource set or a search space, the DCI for scheduling the MBS service is detected and received according to the common frequency domain resource configuration.

[0164] In a possible implementation, the terminal device receives the CFR configuration sent by the network device, and the CFR configuration includes a control resource set or a search space, then the terminal device can learn how to detect and receive the DCI for the scheduled MBS service in the active bandwidth part active BWP according to the common frequency domain resource CFR configuration. And according to the scheduling information carried by the DCI, learn how to detect and receive the PDSCH.

[0165] By implementing the embodiment of the present application, a method for receiving DCI for scheduling multicast scheduling MBS services can be determined according to the common frequency resource (CFR) configuration. In this way, detection errors can be avoided and transmission efficiency can be improved.

[0166] Optionally, the determining how to detect and receive the DCI for scheduling the multicast scheduling MBS service based on the public frequency domain resource configuration of the network device further includes:

[0167] In response to not receiving a common frequency domain resource configuration from a network device, or receiving a common frequency domain resource configuration from a network device but there is no corresponding search space configuration within the common frequency domain resources, and a control resource set for non-MBS data transmission is completely included in the common frequency domain resource configuration, it is determined how to detect and receive the DCI for scheduling the MBS service according to a predefined method or radio resource control (RRC) signaling.

[0168] If the terminal device does not receive the CFR configuration, or receives the CFR configuration and the CFR configuration does not include the control resource set CORESET or search space, the terminal device can learn how to detect and receive the DCI of the scheduled MBS service in the active bandwidth part active BWP according to a predefined method or radio resource control RRC signaling. And according to the scheduling information carried by the DCI, learn how to detect and receive PDSCH.

[0169] In a possible implementation, terminal devices UE#1, UE#2, ... UE#M all support MBS services and belong to the same MBS group. The network device does not configure the CFR on the active bandwidth part active BWP for all or some of the terminals in the MBS group, and the active bandwidth part of UE#1 has no relevant CFR configuration. It is necessary to determine how UE#1 detects and receives the DCI for scheduling the MBS service according to a predefined method or radio resource control (RRC) signaling.

[0170] By implementing the embodiment of the present application, the method of receiving the DCI for scheduling multicast scheduling MBS service can be determined according to the predefined method or radio resource control (RRC) signaling to detect and receive the DCI for scheduling MBS service. In this way, detection errors can be avoided and transmission efficiency can be improved.

[0171] See also Figure 2 , Figure 2 1 is a flow chart of a method for transmitting downlink control information DCI provided in an embodiment of the present application. For use in a terminal device. Figure 2 As shown, the method may include but is not limited to the following steps:

[0172] Step S201: determine the search space within the activated bandwidth portion, and determine the size of the DCI for scheduling the MBS service.

[0173] If the terminal device does not receive the CFR configuration, or receives the CFR configuration and the CFR configuration does not include the control resource set CORESET or the search space, the search space within the activated bandwidth part is determined according to the predefined method or the RRC signaling, and the size of the DCI for scheduling the MBS service is determined.

[0174] Step S202: Determine how to detect and receive the DCI for scheduling the MBS service according to the search space and the size of the DCI for scheduling the MBS service.

[0175] After determining the search space in the activated bandwidth part and the size of the DCI for scheduling the MBS service, the terminal device can search for DCI with the size of the DCI for scheduling the MBS service in the search space to obtain the DCI for scheduling the MBS service. And according to the scheduling information carried by the DCI, it is known how to detect and receive the PDSCH.

[0176] By implementing the embodiment of the present application, the search space in the activated bandwidth part and the size of the DCI for scheduling the MBS service can be determined according to the predefined method, and a method for detecting and receiving the DCI for scheduling the MBS service to determine the DCI for scheduling the multicast scheduling MBS service can be further determined. In this way, detection errors can be avoided and transmission efficiency can be improved.

[0177] Optionally, determining the search space within the activation bandwidth portion includes:

[0178] The network device is configured with an MBS terminal group, and the search space is determined according to a common search space (CSS) configured in the bandwidth part.

[0179] If the network device is configured with an MBS terminal group, and the terminal device belongs to the MBS terminal group, the DCI for scheduling the MBS service may be transmitted using the CSS configured in the BWP.

[0180] In a possible implementation, the CFR is not configured in the activated bandwidth part, and the base station uses the CSS on the active BWP to transmit the MBS-specific DCI for scheduling the MBS service. Furthermore, the CSS type and number of the MBS-specific DCI for transmitting the MBS service scheduling are determined in a predefined manner. The CSS type can be any one of Type0-PDCCH CSS, Type0a-PDCCH CSS, Type1-PDCCH CSS, Type2-PDCCH CSS, and Type3-PDCCH CSS.

[0181] Optionally, determining the search space according to a common search space CSS configured in the bandwidth part includes:

[0182] A common search space CSS having a predefined number is determined as the search space.

[0183] The common search space CSS has a corresponding number index, and the search space in the common search space CSS can be determined according to a predefined number, which is preset. The implementer can adjust the predefined number according to actual conditions.

[0184] By implementing the embodiment of the present application, the search space within the activated bandwidth portion can be determined according to the predefined method, and a method for detecting and receiving the DCI for scheduling the MBS service to determine the DCI for scheduling the multicast scheduling MBS service can be further determined. In this way, detection errors can be avoided and transmission efficiency can be improved.

[0185] Optionally, the determining a common search space CSS with a predefined number as the search space includes at least one of the following:

[0186] Determine the search space according to the highest number of the common search space CSS;

[0187] The search space is determined according to the lowest number of the common search space CSS.

[0188] In a possible implementation manner, the predefined number is the highest number in the CSS.

[0189] In another possible implementation, the predefined number is the lowest number in the CSS.

[0190] In a possible implementation, the terminal UE#1 and the network side determine in a predefined manner to detect, receive and send the DCI for scheduling the MBS service in the CSS. The CSS type used to transmit the MBS-specific DCI is Type3-PDCCH CSS. When there are multiple Type3-PDCCH CSSs in the BWP, it is determined to use the CSS with the lowest CSS index to transmit the MBS-specific DCI.

[0191] By implementing the embodiment of the present application, the search space within the activated bandwidth portion can be determined according to the predefined method, and a method for detecting and receiving the DCI for scheduling the MBS service to determine the DCI for scheduling the multicast scheduling MBS service can be further determined. In this way, detection errors can be avoided and transmission efficiency can be improved.

[0192] Optionally, the determining the search space within the activation bandwidth portion further includes:

[0193] The network device is configured with an MBS terminal group, and the search space is determined according to a user equipment specific search space (USS) configured in the bandwidth part.

[0194] If the network device is configured with an MBS terminal group, and the terminal device belongs to the MBS terminal group, the DCI for scheduling the MBS service may be transmitted using the USS configured in the BWP.

[0195] In a possible implementation, the CFR is not configured in the activated bandwidth part, and the base station transmits the MBS-specific DCI for scheduling MBS services using the USS on the active BWP. Further, the USS number for transmitting the MBS-specific DCI for scheduling MBS services is determined in a predefined manner.

[0196] Optionally, the determining the search space according to a terminal-specific search space USS configured in the bandwidth part includes:

[0197] A USS with a predefined number is determined as the search space.

[0198] The terminal-specific search space USS has a corresponding number, and the search space in the terminal-specific search space USS can be determined according to a predefined number, and the predefined number is preset. The implementer can adjust the predefined number according to actual conditions.

[0199] By implementing the embodiment of the present application, the search space within the activated bandwidth portion can be determined according to the predefined method, and a method for detecting and receiving the DCI for scheduling the MBS service to determine the DCI for scheduling the multicast scheduling MBS service can be further determined. In this way, detection errors can be avoided and transmission efficiency can be improved.

[0200] Optionally, the determining a USS with a predefined number as the search space includes at least one of the following:

[0201] Determine the search space according to the highest number of the terminal-specific search space USS;

[0202] The search space is determined according to a lowest number of the terminal-specific search space USS.

[0203] In a possible implementation, the terminal UE#1 and the network side determine in a predefined manner to detect, receive and send the DCI for scheduling the MBS service in the USS. When there are multiple USSs in the BWP, it is determined to use the USS with the lowest USS index to transmit the MBS-specific DCI.

[0204] By implementing the embodiment of the present application, the search space within the activated bandwidth portion can be determined according to the predefined method, and a method for detecting and receiving the DCI for scheduling the MBS service to determine the DCI for scheduling the multicast scheduling MBS service can be further determined. In this way, detection errors can be avoided and transmission efficiency can be improved.

[0205] Optionally, the determining, according to the RRC signaling, how to detect and receive the DCI for scheduling the MBS service includes:

[0206] The search space in the activated bandwidth part is determined according to the search space number in the RRC signaling.

[0207] The RRC signaling may carry the search space number, and the search space in the active bandwidth part active BWP may be determined according to the search space number.

[0208] In a possible implementation manner, when determining the CSS for transmitting the MBS-specific DCI on the active BWP of UE#1, the base station indicates the type and number of the CSS used by the terminal through RRC signaling.

[0209] In a possible implementation, when determining the USS for transmitting the MBS-specific DCI on the active BWP of UE#1, the base station indicates the USS number used by the terminal through RRC signaling.

[0210] By implementing the embodiment of the present application, the search space in the activated bandwidth part can be determined according to the RRC signaling, and a method for detecting and receiving the DCI for scheduling the MBS service to determine the DCI for scheduling the multicast scheduling MBS service can be further determined. In this way, detection errors can be avoided and transmission efficiency can be improved.

[0211] Optionally, the determining the size of the DCI for scheduling the MBS service includes:

[0212] The DCI for scheduling the MBS service is transmitted in the corresponding common search space CSS, and the CSS type is Type0 / 0a / 1 / 2, then determining the size of the MBS service scheduling DCI to be the effective load size of the first DCI format in the CSS;

[0213] The first DCI format includes at least one of the following: DCI format format 1_0 scrambled by system message radio network temporary identifier SI-RNTI, DCI format format 1_0 scrambled by random access radio network temporary identifier RA-RNTI, DCI format format 1_0 scrambled by temporary cell radio network temporary identifier TC-RNTI, and DCI format format 1_0 scrambled by paging radio network temporary identifier P-RNTI.

[0214] By implementing the embodiment of the present application, the size of the DCI for scheduling MBS services can be determined according to the predefined method, and a method for detecting and receiving the DCI for scheduling MBS services to determine the DCI for scheduling multicast scheduling MBS services can be further determined. In this way, detection errors can be avoided and transmission efficiency can be improved.

[0215] In a possible implementation, the CSS type used to transmit MBS-specific DCI is Type0-PDCCHCSS, and the terminal UE#1 and the network side perform an alignment operation on the MBS-specific DCI transmitted in the active BWP and other DCI transmitted in the corresponding CSS, so that the size of other DCI transmitted in the CSS used to transmit MBS-specific DCI is consistent, and is implemented according to the method described below. The present application does not limit the specific implementation method of the alignment operation. Considering that the DCI for scheduling MBS services is transmitted in the Type 0PDCCH CSS, the payload size of the DCI is consistent with the size of any one of the SI-RNTI scrambled DCI format format 1_0, RA-RNTI scrambled DCI format format 1_0, TC-RNTI scrambled DCI format format 1_0, and P-RNTI scrambled DCI format format 1_0 transmitted in the search space.

[0216] Determine the size of the DCI for scheduling the MBS service according to the type of the common search space CSS

[0217] Optionally, the determining the size of the DCI for scheduling the MBS service further includes:

[0218] The DCI for scheduling the MBS service is transmitted in a corresponding common search space CSS, and the CSS is a CSS of type Type 3, then determining that the size of the MBS service scheduling DCI is the effective load size of the second DCI format in the CSS;

[0219] The second DCI format includes at least one of the following: DCI format 2_0, DCI format 2_1, DCI format 2_2, DCI format 2_3, DCI format 2_4, DCI format 2_5, and DCI format 2_6.

[0220] In a possible implementation, the CSS type used to transmit MBS-specific DCI is Type3-PDCCHCSS, and the terminal UE#1 and the network side perform an alignment operation on the MBS-specific DCI transmitted in the active BWP and other DCI transmitted in the corresponding CSS, so that the size of other DCI transmitted in the CSS used to transmit MBS-specific DCI is consistent, and is implemented according to the method described below. The present application does not limit the specific implementation method of the alignment operation. Considering that the DCI for scheduling MBS services is transmitted in the Type 3PDCCH CSS, the payload size of the DCI is consistent with the size of the DCI format 2_0, DCI format 2_1, DCI format 2_2, DCI format 2_3, DCIformat 2_4, DCI format 2_5 or DCI format 2_6 transmitted in the search space.

[0221] By implementing the embodiment of the present application, the size of the DCI for scheduling MBS services can be determined according to the predefined method, and a method for detecting and receiving the DCI for scheduling MBS services to determine the DCI for scheduling multicast scheduling MBS services can be further determined. In this way, detection errors can be avoided and transmission efficiency can be improved.

[0222] Optionally, the determining the size of the DCI for scheduling the MBS service further includes:

[0223] The DCI for scheduling the MBS service is transmitted in the USS, and the size of the MBS service scheduling DCI is determined to be the effective load size of DCI format 1_1 and / or DCI format 1_2 in the USS.

[0224] In a possible implementation, the USS is used to transmit the MBS-specific DCI, and the terminal UE#1 and the network side perform a pull-to-align operation on the MBS-specific DCI transmitted in the active BWP and other DCI transmitted in the corresponding USS, so that the size of other DCI transmitted in the USS used to transmit the MBS-specific DCI is consistent, and is implemented according to the method described below. The present application does not limit the specific implementation method of the pull-to-align operation. Considering that the DCI for scheduling the MBS service is transmitted in the USS, the payload size of the DCI is consistent with the size of the DCI format 1_1 and / or DCIformat 1_2 transmitted in the search space.

[0225] By implementing the embodiment of the present application, the size of the DCI for scheduling MBS services can be determined according to the predefined method, and a method for detecting and receiving the DCI for scheduling MBS services to determine the DCI for scheduling multicast scheduling MBS services can be further determined. In this way, detection errors can be avoided and transmission efficiency can be improved.

[0226] Optionally, the determining, according to the search space and the size of the DCI for scheduling the MBS service, how to detect and receive the DCI for scheduling the MBS service includes:

[0227] Determine a PDCCH candidate in a common search space CSS in the activated bandwidth part according to the size of the DCI for scheduling the MBS service, and detect and receive the DCI for scheduling the MBS service on all PDCCH candidates included in the CSS; or

[0228] The PDCCH candidates are determined in a common search space CSS in the activated bandwidth part according to the size of the DCI scheduling the MBS service, and the DCI scheduling the MBS service is detected and received on a part of the PDCCH candidates included in the CSS.

[0229] In the embodiment of the present application, after obtaining the size of the search space and the DCI for scheduling the MBS service, the PDCCH candidate can be determined in the search space, and the DCI for scheduling the MBS service can be detected and received among all the PDCCH candidates according to the size of the DCI for scheduling the MBS service, and the search space is a common search space CSS. Or

[0230] After obtaining the search space and the size of the DCI for scheduling the MBS service, PDCCH candidates are determined in the search space, and the DCI for scheduling the MBS service is detected and received in some of the PDCCH candidates according to the size of the DCI for scheduling the MBS service, and the search space is a common search space CSS.

[0231] In a possible implementation, the CSS type used to transmit MBS-specific DCI is Type3-PDCCHCSS. After determining the search space corresponding to the activated bandwidth part, the DCI for scheduling MBS services is transmitted in the search space according to the corresponding DCI payload size. Attempt to detect and receive the MBS-specific DCI on all PDCCH candidates included in the CSS, and the CRC of the MBS-specific DCI is scrambled by the access network radio network temporary identifier (Group scheduling Radio Network Temporary Identifier, G-RNTI).

[0232] By implementing the embodiment of the present application, it is possible to determine how to detect and receive the DCI for scheduling the MBS service according to the PDCCH candidate, the search space and the size of the DCI for scheduling the MBS service. In this way, detection errors can be avoided and transmission efficiency can be improved.

[0233] Optionally, the detecting and receiving DCI for scheduling the MBS service on some of the PDCCH candidates included in the CSS includes:

[0234] Detecting and receiving the DCI for scheduling the MBS service on predefined N PDCCH candidates, where N is a positive integer; or

[0235] The DCI for scheduling the MBS service is detected and received on the PDCCH candidate indicated by the RRC signaling configuration.

[0236] In a possible implementation, the CSS type used to transmit MBS-specific DCI is Type3-PDCCHCSS. After determining the search space corresponding to the activated bandwidth part, the DCI for scheduling the MBS service is transmitted in the search space according to the corresponding DCI payload size. N PDCCH candidates are selected from the PDCCH candidates included in the CSS, and the MBS-specific DCI is attempted to be detected and received thereon, and the CRC of the MBS-specific DCI is scrambled by the G-RNTI.

[0237] In a possible implementation, the CSS type used to transmit MBS-specific DCI is Type3-PDCCHCSS. After determining the search space corresponding to the activated bandwidth part, the DCI for scheduling the MBS service is transmitted in the search space according to the corresponding DCI payload size. According to the configuration of the RRC signaling, a part of the PDCCH candidates included in the CSS is obtained, and the MBS-specific DCI is attempted to be detected and received thereon, and the CRC of the MBS-specific DCI is scrambled by the G-RNTI.

[0238] By implementing the embodiments of the present application, it is possible to determine how to detect and receive the DCI scheduling the MBS service according to the predefined or RRC signaling indicated PDCCH candidates, the search space and the size of the DCI scheduling the MBS service. In this way, detection errors can be avoided and transmission efficiency can be improved.

[0239] Optionally, the determining, according to the search space and the size of the DCI for scheduling the MBS service, how to detect and receive the DCI for scheduling the MBS service includes:

[0240] Determine a PDCCH candidate in a terminal-specific search space USS in the activated bandwidth part according to the size of the DCI for scheduling the MBS service, and detect and receive the DCI for scheduling the MBS service on all PDCCH candidates included in the USS; or

[0241] The PDCCH candidate is determined in a terminal-specific search space USS in the activated bandwidth part according to the size of the DCI for scheduling the MBS service, and the DCI for scheduling the MBS service is detected and received on a portion of the PDCCH candidates included in the USS.

[0242] In a possible implementation, the USS is used to transmit the MBS-specific DCI. After determining the search space corresponding to the activated bandwidth part, the DCI for scheduling the MBS service is transmitted in the search space according to the corresponding DCI payload size. N PDCCH candidates are selected from the PDCCH candidates included in the USS, and the MBS-specific DCI is attempted to be detected and received thereon, and the CRC of the MBS-specific DCI is scrambled by the G-RNTI.

[0243] In a possible implementation, the USS is used to transmit the MBS-specific DCI. After determining the search space corresponding to the activated bandwidth part, the DCI for scheduling the MBS service is transmitted in the search space according to the corresponding DCI payload size. According to the configuration of the RRC signaling, a part of the PDCCH candidates included in the USS is obtained, and the MBS-specific DCI is attempted to be detected and received thereon, and the CRC of the MBS-specific DCI is scrambled by the G-RNTI.

[0244] By implementing the embodiment of the present application, it is possible to determine how to detect and receive the DCI for scheduling the MBS service according to the PDCCH candidate, the search space and the size of the DCI for scheduling the MBS service. In this way, detection errors can be avoided and transmission efficiency can be improved.

[0245] Optionally, the detecting and receiving a DCI for scheduling the MBS service on a portion of the PDCCH candidates included in the USS includes:

[0246] Detecting and receiving the DCI for scheduling the MBS service on predefined N PDCCH candidates, where N is a positive integer; or

[0247] The DCI for scheduling the MBS service is detected and received on the PDCCH candidate indicated by the RRC signaling configuration.

[0248] In a possible implementation manner, a positive integer N is predefined, and the DCI for scheduling the MBS service is detected and received on the N PDCCH candidates.

[0249] In a possible implementation manner, the corresponding PDCCH candidate is acquired according to the RRC signaling configuration indication, and the DCI for scheduling the MBS service is detected and received on the PDCCH candidate indicated by the RRC signaling.

[0250] By implementing the embodiments of the present application, it is possible to determine how to detect and receive the DCI scheduling the MBS service according to the predefined or RRC signaling indicated PDCCH candidates, the search space and the size of the DCI scheduling the MBS service. In this way, detection errors can be avoided and transmission efficiency can be improved.

[0251] See also Figure 3 , Figure 3 1 is a flow chart of a method for transmitting downlink control information DCI provided in an embodiment of the present application. Figure 3 As shown, the method may include but is not limited to the following steps:

[0252] Step S301: Sending public frequency domain resource configuration to a terminal device;

[0253] In the embodiment of the present application, the common frequency domain resource CFR sent by the network device is configured to the terminal device, and the DCI for scheduling the multicast scheduling MBS service, that is, the method of sending the multicast scheduling service-specific downlink control information MBS-specific DCI is determined according to the CFR configuration.

[0254] Step S302: Determine how to send DCI for scheduling multicast scheduling MBS services according to the common frequency domain resource configuration.

[0255] In an embodiment of the present application, a terminal device receives a common frequency domain resource CFR configuration sent by the network device. If the network device is configured with the CFR and the CFR configuration includes a control resource set or a search space, the network device sends the DCI for scheduling the MBS service according to the common frequency domain resource configuration.

[0256] If the network device is not configured with the CFR for the terminal device, or is configured with the CFR for the terminal device and the CFR configuration does not include the control resource set or the search space, it is necessary to determine the search space in the activated bandwidth part active BWP and the size of the DCI for scheduling the MBS service according to a predefined method, and determine how to send the DCI for scheduling the MBS service according to the search space and the size of the DCI for scheduling the MBS service.

[0257] By implementing the embodiment of the present application, a method for sending a DCI for scheduling multicast scheduling MBS services can be determined according to the CFR configuration. In this way, detection errors can be avoided and transmission efficiency can be improved.

[0258] Optionally, the determining how to send a DCI for scheduling a multicast scheduling MBS service according to the common frequency domain resource configuration includes:

[0259] The common frequency domain resource configuration includes a control resource set or a search space, and the DCI for scheduling the MBS service is sent according to the common frequency domain resource configuration.

[0260] In a possible implementation, the network device sends the CFR configuration, and the CFR configuration includes a control resource set or a search space, then the network device can learn how to send the DCI for scheduling MBS services in the active bandwidth part active BWP according to the common frequency domain resource CFR configuration. And according to the scheduling information carried by the DCI, learn how to send PDSCH.

[0261] Optionally, the determining how to send a DCI for scheduling a multicast scheduling MBS service according to the common frequency domain resource configuration further includes:

[0262] If the public frequency domain resource configuration is not sent or the public frequency domain resource does not contain the corresponding search space configuration, and the control resource set for non-MBS data transmission is completely contained in the public frequency domain resource configuration, then how to send the DCI for scheduling the MBS service is determined according to a predefined method or wireless resource control RRC signaling.

[0263] If the network device does not send the CFR configuration, or sends the CFR configuration and the CFR configuration does not contain the control resource set CORESET or search space, the network device can learn how to send the DCI for scheduling MBS services in the active bandwidth part active BWP according to a predefined method or radio resource control RRC signaling. And according to the scheduling information carried by the DCI, learn how to send PDSCH.

[0264] In a possible implementation, terminal devices UE#1, UE#2, ...UE#M all support MBS services and belong to the same MBS group. The network device does not configure the CFR on the active bandwidth part active BWP for all or some of the terminals in the MBS group, and the active bandwidth part of UE#1 has no relevant CFR configuration. It is necessary to determine how the network device sends the DCI for scheduling the MBS service according to a predefined method or radio resource control (RRC) signaling.

[0265] By implementing the embodiment of the present application, the method of sending the DCI for scheduling the MBS service can be determined according to the predefined method or radio resource control (RRC) signaling. In this way, detection errors can be avoided and transmission efficiency can be improved.

[0266] See also Figure 4 , Figure 4 1 is a flow chart of a method for transmitting downlink control information DCI provided in an embodiment of the present application. Figure 4 As shown, the method may include but is not limited to the following steps:

[0267] Step S401: determine the search space within the activated bandwidth portion, and determine the size of the DCI for scheduling the MBS service.

[0268] If the network device does not send the CFR configuration, or sends the CFR configuration and the CFR configuration does not include the control resource set CORESET or the search space, the search space within the activated bandwidth part is determined according to the predefined method or the RRC signaling, and the size of the DCI for scheduling the MBS service is determined.

[0269] Step S402: Determine how to send the DCI for scheduling the MBS service according to the search space and the size of the DCI for scheduling the MBS service.

[0270] After determining the search space in the activated bandwidth part and the size of the DCI for scheduling the MBS service, the network device can search for DCI with the size of the DCI for scheduling the MBS service in the search space to obtain the DCI for scheduling the MBS service. And according to the scheduling information carried by the DCI, it is known how to send the PDSCH.

[0271] Optionally, determining the search space within the activation bandwidth portion includes:

[0272] An MBS terminal group is configured, and the terminal device belongs to the terminal group, and the search space is determined according to a common search space CSS configured in the bandwidth part.

[0273] If the network device is configured with an MBS terminal group, and the terminal device belongs to the MBS terminal group, the DCI for scheduling the MBS service may be transmitted using the CSS configured in the BWP.

[0274] In a possible implementation, the CFR is not configured in the activated bandwidth part, and the base station uses the CSS on the active BWP to transmit the MBS-specific DCI for scheduling the MBS service. Furthermore, the CSS type and number of the MBS-specific DCI for transmitting the MBS service scheduling are determined in a predefined manner. The CSS type can be any one of Type0-PDCCH CSS, Type0a-PDCCH CSS, Type1-PDCCH CSS, Type2-PDCCH CSS, and Type3-PDCCH CSS.

[0275] Optionally, determining the search space according to a common search space CSS configured in the bandwidth part includes:

[0276] A common search space CSS having a predefined number is determined as the search space.

[0277] The common search space CSS has a corresponding number index, and the search space in the common search space CSS can be determined according to a predefined number, which is preset. The implementer can adjust the predefined number according to actual conditions.

[0278] Optionally, the determining a common search space CSS with a predefined number as the search space includes at least one of the following:

[0279] Determine the search space according to the highest number of the common search space CSS;

[0280] The search space is determined according to the lowest number of the common search space CSS.

[0281] In a possible implementation manner, the predefined number is the highest number in the CSS.

[0282] In another possible implementation, the predefined number is the lowest number in the CSS.

[0283] In a possible implementation, the terminal UE#1 and the network side determine to send and send the DCI for scheduling the MBS service in the CSS in a predefined manner. The CSS type used to transmit the MBS-specific DCI is Type3-PDCCHCSS. When there are multiple Type3-PDCCH CSSs in the BWP, it is determined to use the CSS with the lowest CSS index to transmit the MBS-specific DCI.

[0284] Optionally, the determining the search space within the activation bandwidth portion further includes:

[0285] The network device is configured with an MBS terminal group, and determines the search space according to a terminal-specific search space USS configured in the bandwidth part.

[0286] If the network device is configured with an MBS terminal group, and the terminal device belongs to the MBS terminal group, the DCI for scheduling the MBS service may be transmitted using the USS configured in the BWP.

[0287] In a possible implementation, the CFR is not configured in the activated bandwidth part, and the base station transmits the MBS-specific DCI for scheduling MBS services using the USS on the active BWP. Further, the USS number for transmitting the MBS-specific DCI for scheduling MBS services is determined in a predefined manner.

[0288] Optionally, the determining the search space according to a terminal-specific search space USS configured in the bandwidth part includes:

[0289] A USS with a predefined number is determined as the search space.

[0290] The terminal-specific search space USS has a corresponding number, and the search space in the terminal-specific search space USS can be determined according to a predefined number, and the predefined number is preset. The implementer can adjust the predefined number according to actual conditions.

[0291] Optionally, the determining a USS with a predefined number as the search space includes at least one of the following:

[0292] Determine the search space according to the highest number of the terminal-specific search space USS;

[0293] The search space is determined according to a lowest number of the terminal-specific search space USS.

[0294] In a possible implementation, the terminal UE#1 and the network side determine to send the DCI for scheduling the MBS service in the USS in a predefined manner. When there are multiple USSs in the BWP, it is determined to use the USS with the lowest USSindex to transmit the MBS-specific DCI.

[0295] Optionally, the determining, according to RRC signaling, how to send the DCI for scheduling the MBS service includes:

[0296] The search space in the activated bandwidth part is determined according to the search space number in the RRC signaling.

[0297] The RRC signaling may carry the search space number, and the search space in the active bandwidth part active BWP may be determined according to the search space number.

[0298] In a possible implementation manner, when determining the CSS for transmitting the MBS-specific DCI on the active BWP of UE#1, the base station indicates the type and number of the CSS used by the terminal through RRC signaling.

[0299] In a possible implementation, when determining the USS for transmitting the MBS-specific DCI on the active BWP of UE#1, the base station indicates the USS number used by the terminal through RRC signaling.

[0300] Optionally, the determining the size of the DCI for scheduling the MBS service includes:

[0301] The DCI for scheduling the MBS service is transmitted in the corresponding common search space CSS, and the CSS type is Type0 / 0a / 1 / 2, then determining the size of the MBS service scheduling DCI to be the effective load size of the first DCI format in the CSS;

[0302] The first DCI format includes at least one of the following: DCI format format 1_0 scrambled by system message radio network temporary identifier SI-RNTI, DCI format format 1_0 scrambled by random access radio network temporary identifier RA-RNTI, DCI format format 1_0 scrambled by temporary cell radio network temporary identifier TC-RNTI, and DCI format format 1_0 scrambled by paging radio network temporary identifier P-RNTI.

[0303] In a possible implementation, the CSS type used to transmit MBS-specific DCI is Type0-PDCCHCSS, and the terminal UE#1 and the network side perform an alignment operation on the MBS-specific DCI transmitted in the active BWP and other DCI transmitted in the corresponding CSS, so that the size of other DCI transmitted in the CSS used to transmit MBS-specific DCI is consistent, and is implemented according to the method described below. The present application does not limit the specific implementation method of the alignment operation. Considering that the DCI for scheduling MBS services is transmitted in the Type 0PDCCH CSS, the payload size of the DCI is consistent with the size of any one of the SI-RNTI scrambled DCI format format 1_0, RA-RNTI scrambled DCI format format 1_0, TC-RNTI scrambled DCI format format 1_0, and P-RNTI scrambled DCI format format 1_0 transmitted in the search space.

[0304] Determine the size of the DCI for scheduling the MBS service according to the type of the common search space CSS

[0305] Optionally, the determining the size of the DCI for scheduling the MBS service further includes:

[0306] The DCI for scheduling the MBS service is transmitted in a corresponding common search space CSS, and the CSS is a CSS of type Type 3, then determining that the size of the MBS service scheduling DCI is the effective load size of the second DCI format in the CSS;

[0307] The second DCI format includes at least one of the following: DCI format 2_0, DCI format 2_1, DCI format 2_2, DCI format 2_3, DCI format 2_4, DCI format 2_5, and DCI format 2_6.

[0308] In a possible implementation, the CSS type used to transmit MBS-specific DCI is Type3-PDCCHCSS, and the terminal UE#1 and the network side perform an alignment operation on the MBS-specific DCI transmitted in the active BWP and other DCI transmitted in the corresponding CSS, so that the size of other DCI transmitted in the CSS used to transmit MBS-specific DCI is consistent, and is implemented according to the method described below. The present application does not limit the specific implementation method of the alignment operation. Considering that the DCI for scheduling MBS services is transmitted in the Type 3PDCCH CSS, the payload size of the DCI is consistent with the size of the DCI format 2_0, DCI format 2_1, DCI format 2_2, DCI format 2_3, DCIformat 2_4, DCI format 2_5 or DCI format 2_6 transmitted in the search space.

[0309] Optionally, the determining the size of the DCI for scheduling the MBS service further includes:

[0310] The DCI for scheduling the MBS service is transmitted in the USS, and the size of the MBS service scheduling DCI is determined to be the effective load size of DCI format 1_1 and / or DCI format 1_2 in the USS.

[0311] In a possible implementation, the USS is used to transmit the MBS-specific DCI, and the terminal UE#1 and the network side perform a pull-to-align operation on the MBS-specific DCI transmitted in the active BWP and other DCI transmitted in the corresponding USS, so that the size of other DCI transmitted in the USS used to transmit the MBS-specific DCI is consistent, and is implemented according to the method described below. The present application does not limit the specific implementation method of the pull-to-align operation. Considering that the DCI for scheduling the MBS service is transmitted in the USS, the payload size of the DCI is consistent with the size of the DCI format 1_1 and / or DCIformat 1_2 transmitted in the search space.

[0312] Optionally, the determining, according to the search space and the size of the DCI for scheduling the MBS service, how to send the DCI for scheduling the MBS service includes:

[0313] Determine a PDCCH candidate in a common search space CSS in the activated bandwidth part according to the size of the DCI for scheduling the MBS service, and send the DCI for scheduling the MBS service on all PDCCH candidates included in the CSS; or

[0314] The PDCCH candidates are determined in a common search space CSS in the activated bandwidth part according to the size of the DCI for scheduling the MBS service, and the DCI for scheduling the MBS service is sent on a portion of the PDCCH candidates included in the CSS.

[0315] In the embodiment of the present application, after obtaining the search space and the size of the DCI for scheduling the MBS service, the PDCCH candidate can be determined in the search space, and the DCI for scheduling the MBS service is sent among all the PDCCH candidates according to the size of the DCI for scheduling the MBS service, and the search space is a common search space CSS. Or

[0316] After obtaining the search space and the size of the DCI for scheduling the MBS service, PDCCH candidates are determined in the search space, and the DCI for scheduling the MBS service is sent in some of the PDCCH candidates according to the size of the DCI for scheduling the MBS service, and the search space is a common search space CSS.

[0317] In a possible implementation, the CSS type used to transmit MBS-specific DCI is Type3-PDCCHCSS. After determining the search space corresponding to the activated bandwidth part, the DCI for scheduling MBS services is transmitted in the search space according to the corresponding DCI payload size. The MBS-specific DCI is attempted to be sent on all PDCCH candidates included in the CSS, and the CRC of the MBS-specific DCI is scrambled by the G-RNTI.

[0318] Optionally, the sending the DCI for scheduling the MBS service on some of the PDCCH candidates included in the CSS includes:

[0319] Sending the DCI for scheduling the MBS service on predefined N PDCCH candidates, where N is a positive integer; or

[0320] The DCI for scheduling the MBS service is sent on the PDCCH candidate indicated by the RRC signaling configuration.

[0321] In a possible implementation, the CSS type used to transmit MBS-specific DCI is Type3-PDCCHCSS. After determining the search space corresponding to the activated bandwidth part, the DCI for scheduling the MBS service is transmitted in the search space according to the corresponding DCI payload size. N PDCCH candidates are selected from the PDCCH candidates included in the CSS, and the MBS-specific DCI is attempted to be sent thereon, and the CRC of the MBS-specific DCI is scrambled by the G-RNTI.

[0322] In a possible implementation, the CSS type used to transmit MBS-specific DCI is Type3-PDCCHCSS. After determining the search space corresponding to the activated bandwidth part, the DCI for scheduling the MBS service is transmitted in the search space according to the corresponding DCI payload size. According to the configuration of the RRC signaling, a part of the PDCCH candidates included in the CSS is obtained, and the MBS-specific DCI is attempted to be sent thereon, and the CRC of the MBS-specific DCI is scrambled by the G-RNTI.

[0323] Optionally, the determining, according to the search space and the size of the DCI for scheduling the MBS service, how to send the DCI for scheduling the MBS service includes:

[0324] Determine a PDCCH candidate in a terminal-specific search space USS in the activated bandwidth part according to the size of the DCI for scheduling the MBS service, and send the DCI for scheduling the MBS service on all PDCCH candidates included in the USS; or

[0325] The PDCCH candidates are determined in a terminal-specific search space USS in the activated bandwidth part according to the size of the DCI for scheduling the MBS service, and the DCI for scheduling the MBS service is sent on a portion of the PDCCH candidates included in the USS.

[0326] In a possible implementation, the USS is used to transmit the MBS-specific DCI. After determining the search space corresponding to the activated bandwidth part, the DCI for scheduling the MBS service is transmitted in the search space according to the corresponding DCI payload size. N PDCCH candidates are selected from the PDCCH candidates included in the USS, and the MBS-specific DCI is attempted to be sent thereon, and the CRC of the MBS-specific DCI is scrambled by the G-RNTI.

[0327] In a possible implementation, the MBS-specific DCI is transmitted as USS, and after determining the search space corresponding to the activated bandwidth part, the DCI for scheduling the MBS service is transmitted in the search space according to the corresponding DCI payload size. According to the configuration of the RRC signaling, a part of the PDCCH candidates included in the USS is obtained, and the MBS-specific DCI is attempted to be sent thereon, and the CRC of the MBS-specific DCI is scrambled by the G-RNTI.

[0328] Optionally, the sending the DCI for scheduling the MBS service on part of the PDCCH candidates included in the USS includes:

[0329] Sending the DCI for scheduling the MBS service on predefined N PDCCH candidates, where N is a positive integer; or

[0330] The DCI for scheduling the MBS service is sent on the PDCCH candidate indicated by the RRC signaling configuration.

[0331] In a possible implementation manner, a positive integer N is predefined, and the DCI for scheduling the MBS service is sent on the N PDCCH candidates.

[0332] In a possible implementation manner, the corresponding PDCCH candidate is acquired according to the RRC signaling configuration indication, and the DCI for scheduling the MBS service is sent on the PDCCH candidate indicated by the RRC signaling.

[0333] In the embodiments provided by the present application, the methods provided by the embodiments of the present application are introduced from the perspectives of network equipment and terminal equipment, respectively. In order to implement the functions in the methods provided by the embodiments of the present application, the network equipment and the terminal equipment may include hardware structures and software modules, and the functions are implemented in the form of hardware structures, software modules, or hardware structures plus software modules. A certain function in the functions may be executed in the form of hardware structures, software modules, or hardware structures plus software modules.

[0334] See also Figure 5 , is a structural diagram of a communication device 50 provided in an embodiment of the present application. Figure 5 The communication device 50 shown may include a transceiver module 501 and a processing module 502. The transceiver module 501 may include a sending module and / or a receiving module, the sending module is used to implement a sending function, the receiving module is used to implement a receiving function, and the transceiver module 501 may implement a sending function and / or a receiving function.

[0335] The communication device 50 may be a terminal device (such as the terminal device in the aforementioned method embodiment), or a device in a terminal device, or a device that can be used in conjunction with a terminal device. Alternatively, the communication device 50 may be a network device, or a device in a network device, or a device that can be used in conjunction with a network device.

[0336] The communication device 50 is a terminal device, including:

[0337] The processing module is used to determine how to detect and receive the DCI of the scheduling multicast scheduling MBS service based on the public frequency domain resource configuration of the network device.

[0338] The communication device 50 is a network device, including:

[0339] A sending module, used for sending a common frequency domain resource configuration to a terminal device;

[0340] The processing module is used to determine how to send the DCI for scheduling multicast scheduling MBS services according to the public frequency domain resource configuration.

[0341] See also Figure 6 , Figure 6 : is a schematic diagram of the structure of another communication device 60 provided in an embodiment of the present application. The communication device 60 can be a network device, or a terminal device (such as the terminal device in the aforementioned method embodiment), or a chip, a chip system, or a processor that supports the network device to implement the aforementioned method, or a chip, a chip system, or a processor that supports the terminal device to implement the aforementioned method. The device can be used to implement the method described in the aforementioned method embodiment, and the details can be referred to the description in the aforementioned method embodiment.

[0342] The communication device 60 may include one or more processors 601. The processor 601 may be a general-purpose processor or a dedicated processor, etc. For example, it may be a baseband processor or a central processing unit. The baseband processor may be used to process the communication protocol and communication data, and the central processing unit may be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute a computer program, and process the data of the computer program.

[0343] Optionally, the communication device 60 may further include one or more memories 602, on which a computer program 603 may be stored, and the processor 601 executes the computer program 603 so that the communication device 60 performs the method described in the above method embodiment. Optionally, data may also be stored in the memory 602. The communication device 60 and the memory 602 may be provided separately or integrated together.

[0344] Optionally, the communication device 60 may further include a transceiver 604 and an antenna 605. The transceiver 604 may be referred to as a transceiver unit, a transceiver, or a transceiver circuit, etc., for implementing a transceiver function. The transceiver 604 may include a receiver and a transmitter, the receiver may be referred to as a receiver or a receiving circuit, etc., for implementing a receiving function; the transmitter may be referred to as a transmitter or a transmitting circuit, etc., for implementing a transmitting function.

[0345] Optionally, the communication device 60 may further include one or more interface circuits 606. The interface circuit 606 is used to receive code instructions and transmit them to the processor 601. The processor 601 runs the code instructions to enable the communication device 60 to perform the method described in the above method embodiment.

[0346] The communication device 60 is a terminal device (such as the terminal device in the above method embodiment): the processor 601 is used to execute Figure 2 Steps S201 and S202 in .

[0347] The communication device 60 is a network device: the transceiver 604 is used to perform Figure 3 Steps S301 and S302 in the above embodiment; Execute Figure 4 Steps S401 and S402 in .

[0348] In one implementation, the processor 601 may include a transceiver for implementing the receiving and sending functions. For example, the transceiver may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit for implementing the receiving and sending functions may be separate or integrated. The above-mentioned transceiver circuit, interface, or interface circuit may be used for reading and writing code / data, or the above-mentioned transceiver circuit, interface, or interface circuit may be used for transmitting or delivering signals.

[0349] In one implementation, the processor 601 may store a computer program 603, which runs on the processor 601 and enables the communication device 60 to perform the method described in the above method embodiment. The computer program 603 may be fixed in the processor 601, in which case the processor 601 may be implemented by hardware.

[0350] In one implementation, the communication device 60 may include a circuit that can implement the functions of sending or receiving or communicating in the aforementioned method embodiment. The processor and transceiver described in the present application can be implemented in an integrated circuit (IC), an analog IC, a radio frequency integrated circuit RFIC, a mixed signal IC, an application specific integrated circuit (ASIC), a printed circuit board (PCB), an electronic device, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), N-type metal oxide semiconductor (nMetal-oxide-semiconductor, NMOS), P-type metal oxide semiconductor (positive channelmetal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0351] The communication device described in the above embodiments may be a network device or a terminal device (such as the terminal device in the above method embodiment), but the scope of the communication device described in this application is not limited thereto, and the structure of the communication device may not be limited thereto. Figure 6 The communication device may be an independent device or may be part of a larger device. For example, the communication device may be:

[0352] (1) Independent integrated circuit IC, or chip, or chip system or subsystem;

[0353] (2) having a set of one or more ICs, and optionally, the IC set may also include a storage component for storing data and computer programs;

[0354] (3) ASIC, such as modem;

[0355] (4) Modules that can be embedded in other devices;

[0356] (5) Receivers, terminal devices, intelligent terminal devices, cellular phones, wireless devices, handheld devices, mobile units, vehicle-mounted devices, network devices, cloud devices, artificial intelligence devices, etc.;

[0357] (6)Others

[0358] For the case where the communication device may be a chip or a chip system, see Figure 7 Schematic diagram of the chip structure shown. Figure 7 The chip shown includes a processor 701 and an interface 702. The number of the processor 701 can be one or more, and the number of the interface 702 can be multiple.

[0359] For the case where the chip is used to implement the functions of the terminal device in the embodiment of the present application (such as the terminal device in the aforementioned method embodiment):

[0360] Interface 702 is used to determine how to detect and receive the DCI for scheduling multicast scheduling MBS services based on the public frequency domain resource configuration of the network device.

[0361] For the case where the chip is used to implement the functions of the network device in the embodiment of the present application:

[0362] Interface 702 is used to send a common frequency domain resource configuration to a terminal device; and determine how to send a DCI for scheduling multicast scheduling MBS services according to the common frequency domain resource configuration.

[0363] Optionally, the chip further includes a memory 703, and the memory 703 is used to store necessary computer programs and data.

[0364] Those skilled in the art may also understand that the various illustrative logical blocks and steps listed in the embodiments of the present application may be implemented by electronic hardware, computer software, or a combination of the two. Whether such functions are implemented by hardware or software depends on the specific application and the design requirements of the entire system. Those skilled in the art may use various methods to implement the functions described for each specific application, but such implementation should not be understood as exceeding the scope of protection of the embodiments of the present application.

[0365] The embodiment of the present application also provides a system for transmitting downlink control information DCI, the system comprising the aforementioned Figure 6 In the embodiment, the communication device as the terminal device (such as the terminal device in the aforementioned method embodiment) and the communication device as the network device, or the system includes the aforementioned Figure 6 The communication device in the embodiment serves as a terminal device (such as the terminal device in the aforementioned method embodiment) and the communication device serves as a network device.

[0366] The present application also provides a readable storage medium having instructions stored thereon, which implement the functions of any of the above method embodiments when executed by a computer.

[0367] The present application also provides a computer program product, which implements the functions of any of the above method embodiments when executed by a computer.

[0368] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a high-density digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0369] A person skilled in the art may understand that the various numerical numbers such as first and second involved in the present application are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application, and also indicate the order of precedence.

[0370] At least one in the present application can also be described as one or more, and a plurality can be two, three, four or more, which is not limited in the present application. In the embodiments of the present application, for a technical feature, the technical features in the technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", etc., and there is no order of precedence or size between the technical features described by the "first", "second", "third", "A", "B", "C" and "D".

[0371] The corresponding relationships shown in each table in the present application can be configured or predefined. The values ​​of the information in each table are only examples and can be configured as other values, which are not limited by the present application. When configuring the corresponding relationship between the information and each parameter, it is not necessarily required to configure all the corresponding relationships illustrated in each table. For example, in the table in the present application, the corresponding relationships shown in some rows may not be configured. For another example, appropriate deformation adjustments can be made based on the above table, such as splitting, merging, etc. The names of the parameters shown in the titles of the above tables can also use other names that can be understood by the communication device, and the values ​​or representations of the parameters can also be other values ​​or representations that can be understood by the communication device. When implementing the above tables, other data structures can also be used, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables or hash tables.

[0372] The predefined in the present application may be understood as defined, predefined, stored, pre-stored, pre-negotiated, pre-configured, solidified, or pre-burned.

[0373] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0374] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0375] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for transmitting downlink control information DCI, characterized in that: For a terminal device, the method comprises: Determine how to detect and receive DCI for scheduling multicast scheduling MBS services based on the public frequency domain resource configuration of the network equipment; The determining how to detect and receive the DCI of the multicast scheduling MBS service based on the public frequency domain resource configuration of the network device includes: Receiving a common frequency domain resource configuration from a network device, wherein the common frequency domain resource configuration includes a search space, and detecting and receiving the DCI for scheduling the MBS service according to the common frequency domain resource configuration; No public frequency domain resource configuration is received from the network device, or public frequency domain resource configuration is received from the network device and there is no corresponding search space configuration in the public frequency domain resource, and the control resource set for non-MBS data transmission is completely included in the public frequency domain resource configuration, and how to detect and receive the DCI for scheduling the MBS service is determined according to a predefined method or radio resource control RRC signaling; The determining, according to a predefined method, how to detect and receive the DCI for scheduling the MBS service includes: Determine a search space within the activated bandwidth portion and a size of the DCI for scheduling the MBS service; How to detect and receive the DCI that schedules the MBS service is determined according to the search space and the size of the DCI that schedules the MBS service.

2. The method according to claim 1, characterized in that The determining of the search space within the activation bandwidth portion comprises: The network device is configured with an MBS terminal group, and determines the search space according to a common search space CSS configured in the bandwidth part.

3. The method according to claim 2, characterized in that The determining the search space according to a common search space CSS configured in the bandwidth part includes: A common search space CSS having a predefined number is determined as the search space.

4. The method according to claim 3, characterized in that The determining a common search space CSS with a predefined number as the search space includes at least one of the following: Determine the search space according to the highest number of the common search space CSS; The search space is determined according to the lowest number of the CSS.

5. The method according to claim 1, characterized in that The determining of the search space within the activation bandwidth portion further includes: The network device is configured with an MBS terminal group, and determines the search space according to a terminal-specific search space USS configured in the bandwidth part.

6. The method according to claim 5, characterized in that The determining the search space according to the terminal-specific search space USS configured in the bandwidth part includes: A USS with a predefined number is determined as the search space.

7. The method according to claim 6, characterized in that The determining of the USS with a predefined number as the search space includes at least one of the following: Determine the search space according to the highest number of the terminal-specific search space USS; The search space is determined according to the lowest number of the USSs.

8. The method according to claim 1, characterized in that The determining, according to the RRC signaling, how to detect and receive the DCI for scheduling the MBS service includes: The search space in the activated bandwidth part is determined according to the search space number in the RRC signaling.

9. The method according to claim 1, characterized in that: The determining the size of the DCI for scheduling the MBS service includes: The DCI for scheduling the MBS service is transmitted in the corresponding common search space CSS, and the CSS type is Type 0 / 0a / 1 / 2, then determining the size of the MBS service scheduling DCI to be the effective load size of the first DCI format in the CSS; The first DCI format includes at least one of the following: DCI format format 1_0 scrambled by system message radio network temporary identifier SI-RNTI, DCI format format 1_0 scrambled by random access radio network temporary identifier RA-RNTI, DCI format format 1_0 scrambled by temporary cell radio network temporary identifier TC-RNTI, and DCI format format 1_0 scrambled by paging radio network temporary identifier P-RNTI.

10. The method according to claim 1, characterized in that The determining the size of the DCI for scheduling the MBS service further includes: The DCI for scheduling the MBS service is transmitted in a corresponding common search space CSS, and the CSS is a CSS of type Type 3, then determining that the size of the MBS service scheduling DCI is the effective load size of the second DCI format in the CSS; The second DCI format includes at least one of the following: DCI format 2_0, DCI format 2_1, DCI format 2_2, DCI format 2_3, DCI format 2_4, DCI format 2_5, and DCI format 2_6.

11. The method according to claim 5, characterized in that The determining the size of the DCI for scheduling the MBS service further includes: The DCI for scheduling the MBS service is transmitted in the USS, and the size of the MBS service scheduling DCI is determined to be the effective load size of DCI format 1_1 and / or DCI format 1_2 in the USS.

12. The method according to claim 1, characterized in that The determining, according to the search space and the size of the DCI for scheduling the MBS service, how to detect and receive the DCI for scheduling the MBS service includes: Determine a PDCCH candidate in a common search space CSS in the activated bandwidth part according to the size of the DCI for scheduling the MBS service, and detect and receive the DCI for scheduling the MBS service on all PDCCH candidates included in the CSS; or The PDCCH candidates are determined in a common search space CSS in the activated bandwidth part according to the size of the DCI scheduling the MBS service, and the DCI scheduling the MBS service is detected and received on a part of the PDCCH candidates included in the CSS.

13. The method according to claim 12, characterized in that The detecting and receiving the DCI for scheduling the MBS service on the part of the PDCCH candidates included in the CSS includes: Detecting and receiving the DCI for scheduling the MBS service on predefined N PDCCH candidates, where N is a positive integer; or The DCI for scheduling the MBS service is detected and received on the PDCCH candidate indicated by the RRC signaling configuration.

14. The method according to claim 1, characterized in that The determining, according to the search space and the size of the DCI for scheduling the MBS service, how to detect and receive the DCI for scheduling the MBS service includes: Determine a PDCCH candidate in a terminal-specific search space USS in the activated bandwidth part according to the size of the DCI for scheduling the MBS service, and detect and receive the DCI for scheduling the MBS service on all PDCCH candidates included in the USS; or The PDCCH candidate is determined in a terminal-specific search space USS in the activated bandwidth part according to the size of the DCI for scheduling the MBS service, and the DCI for scheduling the MBS service is detected and received on a portion of the PDCCH candidates included in the USS.

15. The method according to claim 14, characterized in that The detecting and receiving the DCI for scheduling the MBS service on part of the PDCCH candidates included in the USS includes: Detecting and receiving the DCI for scheduling the MBS service on predefined N PDCCH candidates, where N is a positive integer; or The DCI for scheduling the MBS service is detected and received on the PDCCH candidate indicated by the RRC signaling configuration.

16. A method for transmitting downlink control information DCI, characterized in that: For a network device, the method comprises: Sending public frequency domain resource configuration to the terminal device; Determine how to send a DCI for scheduling multicast scheduling MBS services according to the common frequency domain resource configuration; The determining how to send the DCI for scheduling the multicast scheduling MBS service according to the common frequency domain resource configuration includes: The common frequency domain resource configuration includes a search space, and the DCI for scheduling the MBS service is sent according to the common frequency domain resource configuration; If the common frequency domain resource configuration is not sent or the common frequency domain resource does not include the corresponding search space configuration, and the control resource set for non-MBS data transmission is completely included in the common frequency domain resource configuration, how to send the DCI for scheduling the MBS service is determined according to a predefined method or radio resource control RRC signaling; The determining, according to a predefined method, how to send the DCI for scheduling the MBS service includes: Determine a search space within the activated bandwidth portion and a size of the DCI for scheduling the MBS service; How to send the DCI for scheduling the MBS service is determined according to the search space and the size of the DCI for scheduling the MBS service.

17. The method according to claim 16, characterized in that The determining of the search space within the activation bandwidth portion comprises: An MBS terminal group is configured, and the terminal device belongs to the terminal group, and the search space is determined according to a common search space CSS configured in the bandwidth part.

18. The method according to claim 17, characterized in that The determining the search space according to a common search space CSS configured in the bandwidth part includes: A common search space CSS having a predefined number is determined as the search space.

19. The method according to claim 18, characterized in that The determining a common search space CSS with a predefined number as the search space includes at least one of the following: Determine the search space according to the highest number of the common search space CSS; The search space is determined according to the lowest number of the CSS.

20. The method according to claim 16, characterized in that The determining of the search space within the activation bandwidth portion further includes: The network device is configured with an MBS terminal group, and determines the search space according to a terminal-specific search space USS configured in the bandwidth part.

21. The method according to claim 20, characterized in that The determining the search space according to the terminal-specific search space USS configured in the bandwidth part includes: A USS with a predefined number is determined as the search space.

22. The method according to claim 21, characterized in that The determining of the USS with a predefined number as the search space includes at least one of the following: Determine the search space according to the highest number of the terminal-specific search space USS; The search space is determined according to the lowest number of the USSs.

23. The method according to claim 16, characterized in that The determining, according to the RRC signaling, how to send the DCI for scheduling the MBS service includes: The search space in the activated bandwidth part is determined according to the search space number in the RRC signaling.

24. The method according to claim 16, characterized in that The determining the size of the DCI for scheduling the MBS service includes: The DCI for scheduling the MBS service is transmitted in the corresponding common search space CSS, and the CSS type is Type 0 / 0a / 1 / 2, then determining the size of the MBS service scheduling DCI to be the effective load size of the first DCI format in the CSS; The first DCI format includes at least one of the following: DCI format format 1_0 scrambled by system message radio network temporary identifier SI-RNTI, DCI format format 1_0 scrambled by random access radio network temporary identifier RA-RNTI, DCI format format 1_0 scrambled by temporary cell radio network temporary identifier TC-RNTI, and DCI format format 1_0 scrambled by paging radio network temporary identifier P-RNTI.

25. The method according to claim 16, characterized in that The determining the size of the DCI for scheduling the MBS service further includes: The DCI for scheduling the MBS service is transmitted in a corresponding common search space CSS, and the CSS is a CSS of type Type 3, then determining that the size of the MBS service scheduling DCI is the effective load size of the second DCI format in the CSS; The second DCI format includes at least one of the following: DCI format 2_0, DCI format 2_1, DCI format 2_2, DCI format 2_3, DCI format 2_4, DCI format 2_5, and DCI format 2_6.

26. The method according to claim 20, characterized in that The determining the size of the DCI for scheduling the MBS service further includes: The DCI for scheduling the MBS service is transmitted in the USS, and the size of the MBS service scheduling DCI is determined to be the effective load size of DCI format 1_1 and / or DCI format 1_2 in the USS.

27. The method according to claim 16, characterized in that The determining, according to the search space and the size of the DCI for scheduling the MBS service, how to send the DCI for scheduling the MBS service includes: Determine a PDCCH candidate in a common search space CSS in the activated bandwidth part according to the size of the DCI for scheduling the MBS service, and send the DCI for scheduling the MBS service on all PDCCH candidates included in the CSS; or The PDCCH candidates are determined in a common search space CSS in the activated bandwidth part according to the size of the DCI for scheduling the MBS service, and the DCI for scheduling the MBS service is sent on a portion of the PDCCH candidates included in the CSS.

28. The method according to claim 27, characterized in that The sending the DCI for scheduling the MBS service on the part of the PDCCH candidates included in the CSS includes: Sending the DCI for scheduling the MBS service on predefined N PDCCH candidates, where N is a positive integer; or The DCI for scheduling the MBS service is sent on the PDCCH candidate indicated by the RRC signaling configuration.

29. The method according to claim 16, characterized in that The determining, according to the search space and the size of the DCI for scheduling the MBS service, how to send the DCI for scheduling the MBS service includes: Determine a PDCCH candidate in a terminal-specific search space USS in the activated bandwidth part according to the size of the DCI for scheduling the MBS service, and send the DCI for scheduling the MBS service on all PDCCH candidates included in the USS; or The PDCCH candidates are determined in a terminal-specific search space USS in the activated bandwidth part according to the size of the DCI for scheduling the MBS service, and the DCI for scheduling the MBS service is sent on a portion of the PDCCH candidates included in the USS.

30. The method according to claim 29, characterized in that The sending the DCI for scheduling the MBS service on part of the PDCCH candidates included in the USS includes: Sending the DCI for scheduling the MBS service on predefined N PDCCH candidates, where N is a positive integer; or The DCI for scheduling the MBS service is sent on the PDCCH candidate indicated by the RRC signaling configuration.

31. A device for transmitting downlink control information DCI, characterized in that: include: A receiving module, used for receiving a public frequency domain resource configuration of a network device; A processing module, configured to determine how to detect and receive the DCI for scheduling multicast scheduling MBS services according to the common frequency domain resource configuration; The processing module is specifically used for: Receiving a common frequency domain resource configuration from a network device, wherein the common frequency domain resource configuration includes a search space, and detecting and receiving the DCI for scheduling the MBS service according to the common frequency domain resource configuration; No public frequency domain resource configuration is received from the network device, or public frequency domain resource configuration is received from the network device and there is no corresponding search space configuration in the public frequency domain resource, and the control resource set for non-MBS data transmission is completely included in the public frequency domain resource configuration, and how to detect and receive the DCI for scheduling the MBS service is determined according to a predefined method or radio resource control RRC signaling; The determining, according to a predefined method, how to detect and receive the DCI for scheduling the MBS service includes: Determine a search space within the activated bandwidth portion and a size of the DCI for scheduling the MBS service; How to detect and receive the DCI that schedules the MBS service is determined according to the search space and the size of the DCI that schedules the MBS service.

32. A device for transmitting downlink control information DCI, characterized in that: include: A sending module, used for sending a common frequency domain resource configuration to a terminal device; A processing module, configured to determine how to send a DCI for scheduling multicast scheduling MBS services according to the public frequency domain resource configuration; The processing module is specifically used for: The common frequency domain resource configuration includes a search space, and the DCI for scheduling the MBS service is sent according to the common frequency domain resource configuration; If the common frequency domain resource configuration is not sent or the common frequency domain resource does not include the corresponding search space configuration, and the control resource set for non-MBS data transmission is completely included in the common frequency domain resource configuration, how to send the DCI for scheduling the MBS service is determined according to a predefined method or radio resource control RRC signaling; The determining, according to a predefined method, how to send the DCI for scheduling the MBS service includes: Determine a search space within the activated bandwidth portion and a size of the DCI for scheduling the MBS service; How to send the DCI for scheduling the MBS service is determined according to the search space and the size of the DCI for scheduling the MBS service.

33. A communication device, characterized in that: The device comprises a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program stored in the memory so that the device performs the method according to any one of claims 1 to 15.

34. A communication device, characterized in that: The device comprises a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program stored in the memory so that the device performs the method according to any one of claims 16 to 30.

35. A communication device, characterized in that: include: processor and interface circuits; The interface circuit is used to receive code instructions and transmit them to the processor; The processor is configured to run the code instructions to perform the method according to any one of claims 1 to 15.

36. A communication device, characterized in that: include: processor and interface circuits; The interface circuit is used to receive code instructions and transmit them to the processor; The processor is configured to execute the code instructions to perform the method according to any one of claims 16 to 30.

37. A computer-readable storage medium storing instructions, which, when executed, enable the method according to any one of claims 1 to 15 to be implemented.

38. A computer-readable storage medium storing instructions, which, when executed, enable the method according to any one of claims 16 to 30 to be implemented.

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