Resource indication method for cooperative transmission and communication device

Abstract

Provided are a resource indication method for cooperative transmission and a communication device, the method comprising: a terminal device receiving first information from a first network device, the first information being used for indicating a first physical downlink shared channel (PDSCH) rate match and a first time offset; the terminal equipment sends second information to the second network equipment according to the first information, the second information is used for indicating second PDSCH rate matching and second time offset, the second PDSCH rate matching is determined according to the first PDSCH rate matching, and the second time offset is determined according to the first time offset. According to the method provided by the invention, the first network equipment and the second network equipment can send the PDSCH to the terminal equipment on the same time-frequency resource. In a multi-station cooperation scene, a plurality of network devices can send the PDSCH to the same terminal device in the same time-frequency resource, and the data transmission performance is improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a resource indication method and communication device for collaborative transmission. Background Art

[0002] In wireless communication systems, multiple network devices (such as base stations) are usually networked to provide wide-area coverage. One network device controls one or more cells to provide wireless coverage. To ensure seamless wide-area coverage, the cell edges of multiple cells controlled by different base stations have overlapping coverage. When a terminal device moves to the edge of a cell's coverage area, the signal power of the terminal device decreases, and the wireless signals of other cells will cause strong interference to the terminal device, reducing the data transmission performance of the terminal device. In order to improve the data transmission performance of terminal devices located in the coverage edge area, the coherent joint transmission (CJT) mechanism is introduced in the wireless communication system.

[0003] In the CJT mechanism, multiple network devices can provide downlink data transmission to terminal devices through coherent joint transmission. The so-called "coherent joint transmission" means that multiple network devices send the same downlink data to the same terminal device, which requires the scheduling information of the physical downlink shared channel (PDSCH) of the multiple network devices to be consistent, so that the wireless resources of multiple network devices when performing CJT can be aligned. Among them, the scheduling information of PDSCH is used to indicate the wireless resources used for downlink data transmission. When the PDSCHs of the multiple network devices reach the terminal device, the PDSCHs are coherently superimposed and their interference is coherently canceled, thereby improving the signal to interference plus noise ratio (SINR) and improving data transmission performance.

[0004] However, in a non-ideal backhaul (BH) scenario, multiple network devices cannot exchange real-time information, and it is difficult for multiple network devices to use the same time-frequency resources for wireless transmission when performing coherent collaborative transmission. Summary of the invention

[0005] The present application provides a resource indication method and communication device for collaborative transmission, which can ensure wireless resource alignment during coherent collaborative transmission between multiple network devices in a non-ideal BH scenario, thereby improving data transmission performance.

[0006] In a first aspect, a resource indication method for collaborative transmission is provided. The method can be executed by a terminal device or by a component of a terminal device (such as a chip or a chip system, etc.), and the present application does not limit this.

[0007] The method includes: a terminal device receives first information, the first information comes from a first network device, and the first information is used to indicate a first physical downlink shared channel (PDSCH) rate matching and a first time offset; the terminal device sends second information to a second network device based on the first information, and the second information is used to indicate a second PDSCH rate matching and a second time offset, the second PDSCH rate matching is determined based on the first PDSCH rate matching, and the second time offset is determined based on the first time offset, wherein the first time offset is an offset between a time unit where the first information is received and a time unit where the first PDSCH rate matching is located, and the second time offset is an offset between a time unit where the second information is sent and a time unit where the second PDSCH rate matching is located.

[0008] It should be understood that PDSCH rate matching is used to determine the time-frequency resources actually used to transmit PDSCH. The PDSCH rate matching can also be called PDSCH dynamic rate matching, or PDSCH dynamic rate matching resources, or PDSCH rate matching resources, etc., which is not limited in this application.

[0009] It should also be understood that the second information is determined based on the first information, that is, the second PDSCH rate matching is determined based on the first PDSCH rate matching, and the second time offset is determined based on the first time offset. The second PDSCH rate matching may be the same as the first PDSCH rate matching, or the second PDSCH rate matching may be different from the first PDSCH rate matching.

[0010] It should also be understood that the first time offset is the offset between the time unit where the first information is received and the time unit where the first PDSCH rate is matched, wherein the time unit where the first information is received can be used to indicate the time unit where the terminal device receives the first information; or, the first time offset is the offset between the time unit where the first information is sent and the time unit where the first PDSCH rate is matched, wherein the time unit where the first information is sent can be used to indicate the time unit where the first network device sends the first information. The second time offset is the offset between the time unit where the second information is sent and the time unit where the second PDSCH rate is matched, wherein the time unit where the second information is sent can be used to indicate the time unit where the terminal device sends the second information; or, the second time offset is the offset between the time unit where the second information is received and the time unit where the second PDSCH rate is matched, wherein the time unit where the second information is received can be used to indicate the time unit where the network device participating in the cooperative transmission of the terminal device (e.g., the first network device, the second network device) receives the second information.

[0011] According to the method provided in the present application, the terminal device receives the first information from the first network device, and determines the second PDSCH rate matching and the second time offset according to the first PDSCH rate matching and the first time offset indicated by the first information. The terminal device indicates the second PDSCH rate matching and the second time offset through the second information, and sends it to the second network device. Further, the second network device sends PDSCH to the terminal device according to the second PDSCH rate matching and the second time offset. Among them, the first network device performs initial scheduling (or pre-scheduling) to determine the first information, and the second network device may not perform initial scheduling. The second network device sends PDSCH to the terminal device based on the second information determined by the first information received from the terminal device, so that the first network device and the second network device can send PDSCH to the terminal device on the same transmission resource. In the scenario where multiple network devices perform collaborative transmission to the same terminal device, it can ensure that the multiple network devices use the same time-frequency resources to transmit data to the same terminal device, thereby improving data transmission performance.

[0012] In combination with the first aspect, in some possible implementations, the terminal device receives at least one third information, the at least one third information comes from at least one second network device, and one third information among the at least one third information is used to indicate a third PDSCH rate match of at least one third PDSCH rate match and a third time offset of at least one third time offset, wherein one third information, one third PDSCH rate match and one third time offset correspond one to one, and the third time offset is the offset between the time unit where the third information is received and the time unit where the third PDSCH rate match is located.

[0013] It should be understood that before the terminal device determines the second information, the terminal device may also receive at least one third information from at least one second network device. In other words, the terminal device may receive one or more third information sent from one or more second network devices, wherein the at least one third information is used to indicate at least one third PDSCH rate matching and at least one third time offset, and the terminal device determines the second information based on the at least one third information and the first information, that is, the second PDSCH rate matching is determined based on the first PDSCH rate matching and at least one third PDSCH rate matching, and the second time offset is determined based on the first time offset and at least one third time offset of the third time offset.

[0014] Based on the above technical solution, the first network device performs initial scheduling to determine the first information, at least one second network device performs initial scheduling to determine at least one third information, the terminal device determines the second information based on the first information and the at least one third information, and sends the second information to the first network device and the at least one second network device. The first network device and the at least one second network device send PDSCH to the terminal device based on the second information, so that the first network device and the at least one second network device can send PDSCH to the terminal device on the same transmission resources. In the scenario where multiple network devices perform collaborative transmission to the same terminal device, it can ensure that the multiple network devices use the same time-frequency resources to transmit data to the same terminal device, thereby improving data transmission performance.

[0015] In combination with the first aspect, in some possible implementations, the terminal device sends the second information to the at least one second network device and the first network device based on the first information and the at least one third information, the second information is determined based on the first information and the at least one third information, the second PDSCH rate match is determined based on the first PDSCH rate match and the at least one third PDSCH rate match, and the second time offset is determined based on the first time offset and at least one third time offset.

[0016] Based on the above technical solution, the terminal device receives the first information from the first network device and at least one third information from at least one second network device. The terminal device determines the second information based on the first information and the at least one third information, and sends the second information to the first network device and the at least one second network device. The first network device and the at least one second network device send the PDSCH to the terminal device according to the second PDSCH rate matching and the second time offset indicated by the second information, so that the first network device and the at least one second network device send the PDSCH to the terminal device according to the same PDSCH rate matching and time unit, ensuring that the first network device and the at least one second network device transmit downlink data to the terminal device on the same resources, so that in the process of coherent collaborative transmission, interference can be reduced, the signal-to-noise ratio and data transmission performance can be improved.

[0017] In combination with the first aspect, in some possible implementations, the first information includes a first index, and the first index is used to indicate the correspondence between the first PDSCH rate matching and the first time offset.

[0018] Based on the above technical solution, the terminal device is predefined or preconfigured with a rule / correspondence between the first PDSCH rate matching and the first time offset, such as a table between the first PDSCH rate matching and the first time offset, that is, the first network device can directly indicate the index (such as the first index) or sequence number of the table in the first information. The terminal device can directly determine the first PDSCH rate matching and the first time offset indicated by the first index based on the first index and the predefined table, thereby reducing resource overhead.

[0019] In combination with the first aspect, in some possible implementations, the first information includes a first field, and the first field is used to indicate the first PDSCH rate matching and the first time offset.

[0020] Based on the above technical solution, the first PDSCH rate match and the first time offset can be directly indicated in the first information through the first field. After the terminal device obtains the first information, it can directly determine the first PDSCH rate match and the first time offset according to the first field in the first information. The first network device can reuse the existing downlink information and use a new first field to indicate the first PDSCH rate match and the first time offset. There is no need to indicate the first PDSCH rate match and the first time offset through new signaling, which saves signaling overhead and achieves better compatibility with existing signaling.

[0021] In combination with the first aspect, in some possible implementations, the second information includes a second index, and the second index is used to indicate the correspondence between the second PDSCH rate matching and the second time offset.

[0022] Based on the above technical solution, the terminal device, the first network device, and the second network device are all predefined or preconfigured with rules (e.g., a table) regarding the second PDSCH rate matching and the second time offset, that is, the terminal device can directly indicate the index (e.g., the second index) or the sequence number of the table in the second information. The first network device and the second network device can directly determine the second PDSCH rate matching and the second time offset indicated by the second index according to the second index and the predefined table, which can reduce resource overhead.

[0023] In combination with the first aspect, in some possible implementations, the second information includes a second field, and the second field is used to indicate the second PDSCH rate matching and the second time offset.

[0024] Based on the above technical solution, the second PDSCH rate matching and the second time offset can be directly indicated in the second information through the second field. After the first network device and the second network device obtain the second information, they can directly determine the second PDSCH rate matching and the second time offset according to the second field in the second information. The terminal device can reuse the existing uplink information and use a new second field to indicate the second PDSCH rate matching and the second time offset. There is no need to indicate the second PDSCH rate matching and the second time offset through new signaling, which saves signaling overhead and achieves better compatibility with existing signaling.

[0025] In combination with the first aspect, in some possible implementations, the third information includes a third index, and the third index is used to indicate the correspondence between the third PDSCH rate matching and the third time offset.

[0026] Based on the above technical solution, the terminal device and the second network device are both predefined or preconfigured with rules (e.g., a table) regarding the third PDSCH rate matching and the third time offset, that is, the second network device can directly indicate the index of the table (e.g., the third index) or the sequence number in the third information. The terminal device can directly determine the third PDSCH rate matching and the third time offset indicated by the third index based on the third index and the predefined table, thereby reducing resource overhead.

[0027] In combination with the first aspect, in some possible implementations, the third information includes a third field, and the third field is used to indicate the third PDSCH rate matching and the third time offset.

[0028] Based on the above technical solution, the third PDSCH rate matching and the third time offset can be directly indicated in the third information through the third field. After the terminal device obtains the third information, the third PDSCH rate matching and the third time offset can be directly determined according to the third field in the third information. The second network device can reuse the existing downlink information and use a new third field to indicate the third PDSCH rate matching and the third time offset. There is no need to indicate the third PDSCH rate matching and the third time offset by adding new signaling, which saves signaling overhead and achieves better compatibility with existing signaling.

[0029] In combination with the first aspect, in some possible implementations, the second time offset includes at least one time offset.

[0030] It should be understood that the time offset in the present application may be a time slot offset, a minislot offset, a subframe offset, or a transmission time interval offset.

[0031] It should be understood that the second time offset includes at least one time offset, and the at least one time offset is determined according to the first time offset, or the at least one time offset is determined according to the first time offset and the third time offset. That is, after the first network device and the second network device receive the at least one time offset, they send the PDSCH to the terminal device on the transmission resource determined according to each time offset in the at least one time offset.

[0032] In combination with the first aspect, in some possible implementations, when the first information is included in the first downlink control information DCI, the first DCI comes from the first network device, and the first DCI includes a first PDSCH rate matching indication field and a fourth field, the first PDSCH rate matching indication field is used to indicate the first PDSCH rate matching, and the fourth field is used to indicate the first time offset.

[0033] It should be understood that when the first network device sends the first DCI to the terminal device, the first DCI includes the first information. The first DCI can reuse the existing PDSCH rate matching indication field (for example, the first PDSCH rate matching indication field) to indicate the first PDSCH rate matching. The first DCI adds a new field (for example, the fourth field), and the fourth field is used to indicate the first time offset.

[0034] In combination with the first aspect, in some possible implementations, when the third information is included in the second downlink control information DCI, the second DCI comes from the second network device, and the second DCI includes a second PDSCH rate matching indication field and a fifth field, the second PDSCH rate matching indication field is used to indicate the third PDSCH rate matching, and the fifth field is used to indicate the third time offset.

[0035] It should be understood that when the second network device sends a second DCI to the terminal device, the second DCI includes the third information. The second DCI can reuse the existing PDSCH rate matching indication field (for example, the second PDSCH rate matching indication field) to indicate the third PDSCH rate matching. The second DCI adds a new field (for example, the fifth field), and the fifth field is used to indicate the third time offset.

[0036] Based on the above technical solution, when the second network device transmits the third information through DCI information, the PDSCH rate matching indication field in the DCI information can be reused to indicate the third PDSCH rate matching, and a new field is added to the DCI to indicate the third time offset, thereby achieving better compatibility with the existing DCI. The third PDSCH rate matching and the third time offset of the second network device are provided to the terminal device through the DCI information, saving signaling overhead.

[0037] In a second aspect, a method for resource indication of collaborative transmission is provided. The method can be executed by a network device or by a component of a network device (such as a chip or a chip system, etc.), and the present application does not limit this.

[0038] The method includes: a second network device receives second information sent by a terminal device, the second information is determined based on first information, the first information comes from the first network device, the first information is used to indicate a first physical downlink shared channel PDSCH rate matching and a first time offset, the second information is used to indicate a second PDSCH rate matching and a second time offset, the second PDSCH rate matching is determined based on the first PDSCH rate matching, and the second time offset is determined based on the first time offset; the second network device sends PDSCH to the terminal device based on the second information, wherein the first time offset is an offset between a time unit where the first information is located and a time unit where the first PDSCH rate matching is located, and the second time offset is an offset between a time unit where the second information is located and a time unit where the second PDSCH rate matching is located.

[0039] According to the method provided in the present application, the second network device receives the second information sent from the terminal device, and the second information is determined by the terminal device based on the first information received from the first network device. The second network device sends PDSCH to the terminal device according to the second PDSCH rate matching and the second time offset indicated by the second information. Among them, the second network device sends PDSCH to the terminal device based on the second information determined by the received terminal device based on the first information, so that the first network device and the second network device can send PDSCH to the terminal device on the same transmission resource. In the scenario where multiple network devices perform collaborative transmission to the same terminal device, it can ensure that the multiple network devices use the same time-frequency resources to transmit data to the same terminal device, thereby improving data transmission performance.

[0040] In combination with the second aspect, in some possible implementations, before the second network device receives the second information sent by the terminal device, the method also includes: the second network device sends third information to the terminal device, the third information being used to indicate a third PDSCH rate match and a third time offset, the third time offset being the offset between the time unit where the third information is sent and the time unit where the third PDSCH rate match is located.

[0041] Based on the above technical solution, the second network device sends the third information to the terminal device, and the terminal device determines the second information according to the first information of the first network device and the third information of the second network device, and sends the second information to the first network device and the second network device. The first network device and the second network device send the PDSCH to the terminal device according to the second PDSCH rate matching and the second time offset indicated by the second information, so that the first network device and the second network device send the PDSCH to the terminal device according to the same PDSCH rate matching and time unit, ensuring that the first network device and the second network device transmit downlink data to the terminal device on the same resources, so that in the process of coherent cooperative transmission, interference can be reduced, and the signal-to-noise ratio and data transmission performance can be improved.

[0042] In combination with the second aspect, in some possible implementations, the second information is determined based on the first information and at least one of the third information, at least one of the third information comes from at least one second network device, at least one of the third information is used to indicate at least one third PDSCH rate match and at least one third time offset, the second PDSCH rate match is determined based on the first PDSCH rate match, and the second time offset is determined based on the first time offset, including: the second PDSCH rate match is determined based on the first PDSCH rate match and at least one of the third PDSCH rate matches, and the second time offset is determined based on the first time offset and at least one of the third time offsets.

[0043] In combination with the second aspect, in some possible implementations, the first information includes a first index, and the first index is used to indicate the correspondence between the first PDSCH rate matching resource and the first time offset.

[0044] Based on the above technical solution, the terminal device is predefined or preconfigured with rules (e.g., a table) regarding the first PDSCH rate matching and the first time offset, that is, the first network device can directly indicate the index (e.g., the first index) of the table, or the sequence number, in the first information. The terminal device can directly determine the first PDSCH rate matching and the first time offset corresponding to the first index according to the first index and the predefined table, thereby reducing resource overhead.

[0045] In combination with the second aspect, in some possible implementations, the first information includes a first field, and the first field is used to indicate the first PDSCH rate matching and the first time offset.

[0046] Based on the above technical solution, the first PDSCH rate match and the first time offset can be directly indicated in the first information through the first field. After the terminal device obtains the first information, it can directly determine the first PDSCH rate match and the first time offset according to the first field in the first information. The first network device can reuse the existing downlink information and use a new first field to indicate the first PDSCH rate match and the first time offset. There is no need to indicate the first PDSCH rate match and the first time offset through new signaling, which saves signaling overhead and achieves better compatibility with existing signaling.

[0047] In combination with the second aspect, in some possible implementations, the second information includes a second index, and the second index is used to indicate the correspondence between the second PDSCH rate matching and the second time offset.

[0048] Based on the above technical solution, the terminal device, the first network device, and the second network device are all predefined or preconfigured with rules (e.g., a table) regarding the second PDSCH rate matching and the second time offset, that is, the terminal device can directly indicate the index (e.g., the second index) or the sequence number of the table in the second information. The first network device and the second network device can directly determine the second PDSCH rate matching and the second time offset corresponding to the second index according to the second index and the predefined table, which can reduce resource overhead.

[0049] In combination with the second aspect, in some possible implementations, the second information includes a second field, and the second field is used to indicate the second PDSCH rate matching and the second time offset.

[0050] Based on the above technical solution, the second PDSCH rate matching and the second time offset can be directly indicated in the second information through the second field. After the first network device and the second network device obtain the second information, they can directly determine the second PDSCH rate matching and the second time offset according to the second field in the second information. The terminal device can reuse the existing uplink information and use a new second field to indicate the second PDSCH rate matching and the second time offset. There is no need to indicate the second PDSCH rate matching and the second time offset through new signaling, which saves signaling overhead and achieves better compatibility with existing signaling.

[0051] In combination with the second aspect, in some possible implementations, the third information includes a third index, and the third index is used to indicate the correspondence between the third PDSCH rate matching and the third time offset.

[0052] Based on the above technical solution, the terminal device and the second network device are both predefined or preconfigured with rules (e.g., a table) regarding the third PDSCH rate matching and the third time offset, that is, the second network device can directly indicate the index of the table (e.g., the third index) or the sequence number in the third information. The terminal device can directly determine the third PDSCH rate matching and the third time offset corresponding to the third index according to the third index and the predefined table, thereby reducing resource overhead.

[0053] In combination with the second aspect, in some possible implementations, the third information includes a third field, and the third field is used to indicate the third PDSCH rate matching and the third time offset.

[0054] Based on the above technical solution, the third PDSCH rate matching and the third time offset can be directly indicated in the third information through the third field. After the terminal device obtains the third information, the third PDSCH rate matching and the third time offset can be directly determined according to the third field in the third information. The second network device can reuse the existing downlink information and use a new third field to indicate the third PDSCH rate matching and the third time offset. There is no need to indicate the third PDSCH rate matching and the third time offset by adding new signaling, which saves signaling overhead and achieves better compatibility with existing signaling.

[0055] In conjunction with the second aspect, in some possible implementations, the second time offset includes at least one time offset.

[0056] It should be understood that the second time offset includes at least one time offset, and the at least one time offset is determined according to the first time offset, or the at least one time offset is determined according to the first time offset and the third time offset. That is, after the first network device and the second network device receive the at least one time offset, they send the PDSCH to the terminal device on the transmission resource determined according to each time offset in the at least one time offset.

[0057] In combination with the second aspect, in some possible implementations, when the first information is included in the first downlink control information DCI, the first DCI comes from the first network device, and the first DCI includes a first PDSCH rate matching indication field and a fourth field, the first PDSCH rate matching indication field is used to indicate the first PDSCH rate matching, and the fourth field is used to indicate the first time offset.

[0058] It should be understood that when the first network device sends the first DCI to the terminal device, the first DCI includes the first information. The first DCI can reuse the existing PDSCH rate matching indication field (for example, the first PDSCH rate matching indication field) to indicate the first PDSCH rate matching. The first DCI adds a new field (for example, the fourth field), and the fourth field is used to indicate the first time offset.

[0059] In combination with the second aspect, in some possible implementations, when the third information is included in the second downlink control information DCI, the second DCI comes from the second network device, and the second DCI includes a second PDSCH rate matching indication field and a fifth field, the second PDSCH rate matching indication field is used to indicate the third PDSCH rate matching, and the fifth field is used to indicate the third time offset.

[0060] It should be understood that when the second network device sends a second DCI to the terminal device, the second DCI includes the third information. The second DCI can reuse the existing PDSCH rate matching indication field (for example, the second PDSCH rate matching indication field) to indicate the third PDSCH rate matching. The second DCI adds a new field (for example, the fifth field), and the fifth field is used to indicate the third time offset.

[0061] In a third aspect, a communication device is provided, the device comprising: a transceiver unit, configured to receive first information from a first network device, the first information being used to indicate a first physical downlink shared channel PDSCH rate matching and a first time offset;

[0062] The transceiver unit is also used to send second information to the second network device according to the first information, the second information is used to indicate a second PDSCH rate match and a second time offset, the second PDSCH rate match is determined according to the first PDSCH rate match, and the second time offset is determined according to the first time offset, wherein the first time offset is the offset between the time unit where the first information is located and the time unit where the first PDSCH rate match is located, and the second time offset is the offset between the time unit where the second information is located and the time unit where the second PDSCH rate match is located.

[0063] It should be understood that the transceiver unit can also perform the receiving and sending processing in the aforementioned first aspect.

[0064] In a possible implementation, the communication device further includes a processing unit, which is used for other processing except receiving and sending in the aforementioned first aspect.

[0065] In a fourth aspect, a communication device is provided, the device comprising: a transceiver unit, configured to receive second information sent by a terminal device, the second information being determined according to the first information, the first information being from a first network device, the first information being used to indicate a first physical downlink shared channel PDSCH rate matching and a first time offset, the second information being used to indicate a second PDSCH rate matching and a second time offset, the second PDSCH rate matching being determined according to the first PDSCH rate matching, and the second time offset being determined according to the first time offset;

[0066] The transceiver unit is further configured to send a PDSCH to the terminal device according to the second information,

[0067] Among them, the first time offset is the offset between the time unit where the first information is located and the time unit where the first PDSCH rate matching is located, and the second time offset is the offset between the time unit where the second information is located and the time unit where the second PDSCH rate matching is located.

[0068] It should be understood that the transceiver unit can also perform the receiving and sending processing in the aforementioned second aspect.

[0069] In a possible implementation, the communication device further includes a processing unit, which is used for other processing except receiving and sending in the aforementioned second aspect.

[0070] In a fifth aspect, a communication device is provided, comprising a processor. The processor is coupled to a memory and can be used to execute instructions in the memory to implement the method in the first aspect and any possible implementation of the first aspect, or to implement the method in the second aspect and any possible implementation of the second aspect.

[0071] Optionally, the communication device also includes a memory.

[0072] Optionally, the communication device further includes a communication interface, and the processor is coupled to the communication interface.

[0073] In one implementation, the communication device is a centralized user configuration function. When the communication device is a centralized user configuration function, the communication interface may be a transceiver, or an input / output interface.

[0074] In another implementation, the communication device is a chip configured in a centralized user configuration function. When the communication device is a chip configured in a centralized user configuration function, the communication interface may be an input / output interface.

[0075] Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0076] In a sixth aspect, a processor is provided, comprising: an input circuit, an output circuit, and a processing circuit. The processing circuit is used to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method in any possible implementation of the first aspect, or the processor executes the method in any possible implementation of the second aspect.

[0077] In the specific implementation process, the processor can be one or more chips, the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, a gate circuit, a trigger, and various logic circuits. The input signal received by the input circuit can be, for example, but not limited to, received and input by a receiver, and the signal output by the output circuit can be, for example, but not limited to, output to a transmitter and transmitted by the transmitter, and the input circuit and the output circuit can be the same circuit, which is used as an input circuit and an output circuit at different times. The embodiments of the present application do not limit the specific implementation methods of the processor and various circuits.

[0078] In a seventh aspect, a processing device is provided, comprising a processor and a memory. The processor is used to read instructions stored in the memory, and can receive signals through a receiver and transmit signals through a transmitter to execute the method in any possible implementation of the first aspect, or to execute the method in any possible implementation of the second aspect.

[0079] Optionally, the processor is one or more and the memory is one or more.

[0080] Optionally, the memory may be integrated with the processor, or the memory may be provided separately from the processor.

[0081] In the specific implementation process, the memory can be a non-transitory memory, such as a read-only memory, which can be integrated with the processor on the same chip or can be set on different chips respectively. The embodiment of the present application does not limit the type of memory and the setting method of the memory and the processor.

[0082] It should be understood that the relevant data interaction process, such as sending configuration information, can be a process of outputting configuration information from the processor, and receiving configuration information can be a process of receiving input configuration information by the processor. Specifically, the data output by the processor can be output to the transmitter, and the input data received by the processor can come from the receiver. Among them, the transmitter and the receiver can be collectively referred to as a transceiver.

[0083] The processing device in the seventh aspect may be one or more chips. The processor in the processing device may be implemented by hardware or by software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc.; when implemented by software, the processor may be a general-purpose processor implemented by reading software code stored in a memory, which may be integrated in the processor or located outside the processor and exist independently.

[0084] In an eighth aspect, a computer program product is provided, comprising: a computer program (also referred to as code, or instruction), which, when executed, enables a computer to execute a method in any possible implementation of the first aspect, or enables a computer to execute a method in any possible implementation of the second aspect.

[0085] In the ninth aspect, a computer-readable storage medium is provided, which stores a computer program (also referred to as code, or instruction). When the computer program runs on a computer, the method in any possible implementation of the first aspect is executed, or the method in any possible implementation of the second aspect is executed. BRIEF DESCRIPTION OF THE DRAWINGS

[0086] Figure 1 This is a schematic diagram of rate matching provided in an embodiment of the present application.

[0087] Figure 2 It is a schematic diagram of a communication system to which the example of the present application is applicable.

[0088] Figure 3 It is a process diagram of ideal backhaul link information scheduling.

[0089] Figure 4 It is a process diagram of a collaborative transmission resource indication method provided in an embodiment of the present application.

[0090] Figure 5 It is a schematic diagram of a frame structure in a TDD system provided in an embodiment of the present application.

[0091] Figure 6 This is a schematic diagram of a frame structure in another TDD system provided in an embodiment of the present application.

[0092] Figure 7 It is a schematic diagram of an air interface assisted scheduling process provided in an embodiment of the present application.

[0093] Figure 8 This is another schematic diagram of an air interface assisted scheduling process provided in an embodiment of the present application.

[0094] Fig. 9 A schematic block diagram of a communication device provided in an embodiment of the present application is shown.

[0095] Fig.10 A schematic block diagram of another communication device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0096] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0097] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), worldwide interoperability for microwave access (WiMAX) communication system, fifth generation (5G) system, new radio (NR) system, wireless-fidelity (WiFi) system, third generation partnership project (3GPP) related communication system, and other communication systems (such as 6G system) or multiple communication fusion systems that may appear in the future.

[0098] The terminal device in the embodiment of the present application is a device with wireless transceiver function. For example, it may include a handheld device with wireless connection function, or a processing device connected to a wireless modem. The terminal device can communicate with the core network via the radio access network RAN ​​and exchange voice and / or data with the RAN. The terminal device may refer to user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device (D2D) terminal equipment, V2X terminal equipment, machine-to-machine / machine-type communications (M2M / MTC) terminal equipment, Internet of Things (IoT) terminal equipment, subscriber unit, subscriber station, mobile station, remote station, access point (AP), remote terminal, access terminal, user terminal, user agent or user equipment, etc., and may also include mobile phones (or "cellular" phones), computers with mobile terminal equipment, portable, pocket-sized, handheld, computer-built-in mobile devices, etc. For example, personal communication service (PCS) phones and other devices. In addition, it can also be a restricted device, such as a device with low power consumption, or a device with limited storage capacity, or a device with limited computing power, etc. For example, it includes barcodes, radio frequency identification (RFID), sensors, global positioning systems (GPS), laser scanners and other information sensing devices, etc. The terminal device can be fixed or mobile.

[0099] It should be noted that, in the present application, the device for implementing the function of the terminal device may be the terminal device; or it may be a device that can support the terminal device to implement the function, such as a chip system, which may be installed in the terminal device. In the present application, the chip system may be composed of a chip, or may include a chip and other discrete devices.

[0100] The network device in the embodiment of the present application is an access device for the terminal device to access the mobile communication system wirelessly, including a wireless access network device, such as a base station. The network device may also refer to a device that communicates with the terminal device at the air interface. The network device may include an evolutionary base station (evolutional Node B) in a long-term evolution (LTE) system or an advanced long-term evolution (LTE-A), which may be referred to as eNB or e-NodeB for short). An eNB is a device deployed in a wireless access network that meets the fourth generation (4G) standard and provides wireless communication functions for terminal devices. The network device may also be a new radio controller (NR controller), a base station (gNode B, gNB) in a 5G system, a centralized unit, a new wireless base station, a radio frequency remote module, a micro base station (also called a small station), a relay, a distributed unit, various forms of macro base stations, a transmission reception point (TRP), a reception point (RP), a transmission measurement function (TMF) or a transmission point (TP) or any other wireless access device, and the embodiments of the present application are not limited thereto. The network device may also include a home base station (e.g., home evolved NodeB, or home Node B, HNB), a base band unit (BBU), or a wireless fidelity (Wifi) access point (AP). The embodiments of the present application do not limit the specific technology and specific device form used by the network device. The network device may correspond to an eNB in ​​a 4G system and to a gNB in ​​a 5G system.

[0101] Among them, the base station in the embodiment of the present application may include a centralized unit (CU) and a distributed unit (DU), and multiple DUs can be centrally controlled by one CU. CU and DU can be divided according to the protocol layer functions of the wireless network they possess, for example, the PDCP layer and the protocol layer functions above are set in the CU, and the protocol layers below the PDCP, such as the radio link control (RLC) layer and the media access control (MAC) layer, are set in the DU. It should be noted that this division of the protocol layer is only an example, and it can also be divided in other protocol layers. The radio frequency device can be pulled away and not placed in the DU, or it can be integrated in the DU, or part of it can be pulled away and part of it can be integrated in the DU. The embodiment of the present application does not impose any restrictions. In addition, in some embodiments, the control plane (CP) and the user plane (UP) of the CU can also be separated and divided into different entities for implementation, namely, the control plane CU entity (CU-CP entity) and the user plane CU entity (CU-UP entity). In this network architecture, the signaling generated by the CU can be sent to the terminal device through the DU, or the signaling generated by the UE can be sent to the CU through the DU. DU can directly encapsulate the signaling through the protocol layer and transparently transmit it to UE or CU without parsing the signaling. In this network architecture, CU is divided into a network device on the radio access network (RAN) side. In addition, CU can also be divided as a network device on the core network (CN) side, and this application does not limit this.

[0102] The terminal device in the embodiment of the present application is connected to the wireless access network device by wireless means, and the wireless access network device is connected to the core network device by wireless or wired means. The core network device and the wireless access network device can be independent and different physical devices, or the functions of the core network device and the logical functions of the wireless access network device can be integrated on the same physical device, or the functions of part of the core network device and part of the wireless access network device can be integrated on one physical device. The terminal device can be stationary or movable.

[0103] To facilitate understanding of the embodiments of the present application, several terms involved in the present application are first briefly explained.

[0104] 1. Coherent joint transmission (CJT)

[0105] Multiple network devices transmit data to a terminal device in a coherent transmission manner. The multiple network devices participating in the coherent transmission all obtain relevant data information (for example, data stream information, precoding matrix, etc.) and channel state information (CSI) between the multiple network devices and the terminal device (for example, the covariance matrix of the channel between the multiple network devices and the terminal device, etc.). The multiple network devices can be equivalent to a distributed multiple antenna array, which jointly precodes the same layer of data to be transmitted. The so-called "coherent transmission" means that multiple network devices can jointly transmit the same data, so that the transmission signals of multiple network devices can be superimposed in the same phase when they reach the terminal device, thereby greatly improving the power of the received signal and greatly reducing interference. In other words, coherent transmission can greatly improve the receiving signal-to-interference-noise ratio of the terminal device, thereby significantly improving the data transmission performance.

[0106] 2. Uplink control information (UCI)

[0107] It is usually used to transmit the confirmation (ACK) or negative acknowledgement (NACK) of the hybrid automatic repeat request (HARQ) information for demodulation of the physical downlink shared channel, scheduling request (SR), and CSI. UCI may include one or more of CSI, HARQ information, and SR. Among them, the HARQ information may include ACK or NACK for feedback of one or more physical downlink shared channels. ACK may indicate that the physical downlink shared channel is successfully received and the data in the physical downlink shared channel is successfully decoded; NACK may indicate that the physical downlink shared channel is not successfully received, or the data in the physical downlink shared channel is not successfully decoded. The network device can retransmit data based on the NACK fed back by the terminal device. SR is used for the terminal device to request the network device to allocate physical uplink shared channel resources. CSI may include one or more of precoding matrix indicator (PMI), rank indication (RI), channel quality indicator (CQI), and channel state information reference signal (CSI-RS) resource indication information (CSI-RS resource indication, CRI). Based on different time domain behaviors, CSI can also be divided into periodic CSI, semi-persistent and aperiodic CSI.

[0108] 3. Downlink control information (DCI): control information used to schedule downlink data channels (such as physical downlink shared channels) or uplink data channels (such as physical uplink shared channels) or other control information sent through the downlink.

[0109] 4. Physical downlink shared channel (PDSCH): mainly used for downlink data transmission, and can also be used for the transmission of paging messages and some system messages.

[0110] 5. Duplex mode

[0111] At present, the duplex modes in mobile communication systems include full-duplex and half-duplex. If the transmission and reception of a communication device (such as a terminal device and a network device) can be performed simultaneously, it is called full-duplex. If the transmission and reception of a communication device cannot be performed simultaneously, it is called half-duplex. Among them, the communication device includes a network device and / or a terminal device. For example, the network device and the terminal device are both full-duplex, or the network device and the terminal device are both half-duplex, or the network device is full-duplex and the terminal device is half-duplex, or the network device is half-duplex and the terminal device is full-duplex.

[0112] Time division duplexing (TDD): The frequency range of uplink (UL) and downlink (DL) is the same. For example, the frequency range of UL is 2010 mega Hertz (MHz) ~ 2025MHz, and the frequency range of DL is also 2010MHz ~ 2025MHz. Since UL and DL are not a pair of spectrums, TDD can also be understood as an unpaired spectrum. The terminal device can perform uplink transmission on UL, and the network device can perform downlink transmission on DL. In a TDD system, since the frequency range of UL and DL is the same, uplink transmission and downlink transmission cannot be performed at the same time. UL transmission or DL ​​transmission can be performed on one symbol in a time slot. Therefore, TDD is half-duplex. For example, the terminal device and the network device can both be half-duplex.

[0113] Frequency division duplex (FDD): The frequency range of the UL working frequency band and the DL working frequency band are different, which can be understood as the frequency range of UL and DL do not overlap at all. For example, the frequency range of UL is 1920MHz~1980MHz, and the frequency range of DL is 2110MHz~2170MHz. Since UL and DL are a pair of spectrums, FDD can also be understood as a paired spectrum. The terminal device can perform uplink transmission on UL, and the network device can perform downlink transmission on DL. In the FDD system, since UL and DL are different, uplink transmission and downlink transmission can be performed simultaneously. Therefore, FDD is full-duplex. For example, the terminal device and the network device can both be full-duplex.

[0114] 6. Slot

[0115] In the NR system, for a normal cyclic prefix (CP), one time slot contains 14 orthogonal frequency division multiplexing (OFDM) symbols (hereinafter referred to as symbols). For an extended CP, one time slot contains 12 symbols.

[0116] A time slot can be an uplink time slot (U) or a downlink time slot (D) or a special time slot (S). The uplink time slot is configured to be used only for uplink transmission, and all symbols in the uplink time slot are uplink symbols, that is, the uplink symbols are configured to be used only for uplink transmission; the downlink time slot is configured to be used only for downlink transmission, and all symbols in the downlink time slot are downlink symbols, that is, the downlink symbols are configured to be used only for downlink transmission; the special time slot can be configured to be used for uplink transmission, or configured to be used for downlink transmission, but cannot be used for uplink and downlink transmission at the same time, and the special time slot can be used as a switching point between uplink and downlink, and the symbols in the special time slot can include a part of uplink symbols, a part of downlink symbols and interval symbols, and the interval symbols are located between the uplink symbols and the downlink symbols in the special time slot, and data cannot be sent on the interval symbols.

[0117] 7.TDD frame structure

[0118] The frame format of the 5G NR system in TDD mode includes downlink time slots, special time slots, and uplink time slots. Among them, the number of uplink time slots can be 1 or more, the number of downlink time slots can be 1 or more, and the number of special time slots is 1.

[0119] The frame length of the radio frame in the 5G NR system is 10 milliseconds (ms), and the radio frame includes 10 subframes. The frame length of each subframe is 1ms, and the number of time slots included in each subframe is determined by the system parameter set. The time slots for uplink transmission and the time slots for downlink transmission included in each radio frame are determined by the TDD frame ratio.

[0120] Exemplarily, taking the TDD frame ratio of 4:1 and each subframe including one time slot as an example, the types of time slots in the wireless frame under this structure may be as shown in Table 1.

[0121] Table 1. Types of time slots when the TDD frame ratio is 4:1

[0122] Time slot Time Slot 0 Time Slot 1 Time Slot 2 Time Slot 3 Time Slot 4 Time Slot 5 Time Slot 6 Time Slot 7 Time Slot 8 Time Slot 9 Time slot type D D D S U D D D S U

[0123] In the above Table 1, the time slot corresponding to the time slot type D is a downlink time slot, the time slot corresponding to the time slot type U is an uplink time slot, and the time slot corresponding to the time slot type S is a special time slot. A time period includes 5 time slots, such as time slot 0-time slot 4, or time slot 5-time slot 9 in Table 1. The 5 time slots include 3 uplink time slots, 1 special time slot and 1 uplink time slot. The special time slot is located between the downlink time slot and the uplink time slot, and serves as a switching point between uplink and downlink.

[0124] Exemplarily, taking the TDD frame ratio of 8:2 and each subframe including one time slot as an example, the types of time slots in the wireless frame under this structure may be as shown in Table 2.

[0125] Table 2. Types of time slots when the TDD frame ratio is 8:2

[0126] Time slot Time Slot 0 Time Slot 1 Time Slot 2 Time Slot 3 Time Slot 4 Time Slot 5 Time Slot 6 Time Slot 7 Time Slot 8 Time Slot 9 Time slot type D D D D D D D S U U

[0127] In the above Table 2, when the TDD frame ratio is 8:2, one time period includes 10 time slots, such as time slot 0 to time slot 9 in Table 2. The 10 time slots include 7 downlink time slots, 1 special time slot and 2 uplink time slots. The 1 special time slot is located between the downlink time slot and the uplink time slot as a switching point between uplink and downlink.

[0128] 7.PDSCH rate matching

[0129] PDSCH rate matching refers to the need to avoid unusable resources when mapping PDSCH resources, and only perform PDSCH resource mapping on available resources. Among them, PDSCH resources refer to time domain resources and / or frequency domain resources, among which time domain resources can be OFDM symbols or symbols. Frequency domain resources can be resource blocks (RBs), resource block groups (RBGs), or resource elements (REs).

[0130] It should be understood that PDSCH rate matching can be used to indicate that certain specific time-frequency resource locations are occupied by other signals or channels, or are reserved. When performing PDSCH resource mapping, the network device does not map the PDSCH resources to these time-frequency resources, that is, it does not transmit PDSCH through these time-frequency resources.

[0131] like Figure 1 As shown, each pattern group in the PDSCH rate matching pattern group contains one or more patterns. The PDSCH rate matching pattern group defines a set of time-frequency resource locations. Whether the puncturing location contained in each pattern group is effective can be indicated by the downlink information (such as DCI) of the network device. Among them, the PDSCH rate matching pattern is not included in the pattern group, such as Figure 1The PDSCH rate matching pattern 3 in the group is not in group 1 and group 2, that is, the PDSCH rate matching pattern 3 is not controlled by the downlink information of the network device and is puncturing by default.

[0132] Currently, the Third Generation Partnership Project (3 rd In the 3GPP technical specification (TS) 38.212v17.5.0 standard, downlink information takes DCI as an example. DCI can contain 0 bits, 1 bits or 2 bits to indicate pattern groups. The specific number of bits is determined by high-level parameters. Assume that when there are two pattern groups, the most significant bit (MSB) of the 2 bits contained in DCI is used to indicate pattern group 1, and the least significant bit (LSB) is used to indicate pattern group 2. Figure 1 Group 1 and group 2 in the DCI, where group 1 includes PDSCH rate matching pattern 0 and PDSCH rate matching pattern 1, group 2 includes PDSCH rate matching pattern 2, and PDSCH rate matching pattern 3 is not included in the pattern group. The DCI contains a 2-bit indicator bit to indicate the pattern group, that is, the value of the indicator bit in the DCI can be "00, 01, 10, 11".

[0133] like Figure 1As shown in the figure, when the 2-bit indicator bit contained in the DCI is "00", that is, the rate matching of the time-frequency resource position corresponding to the PDSCH rate matching pattern 0, PDSCH rate matching pattern 1 and PDSCH rate matching pattern 2 contained in group1 and group2 is not effective, that is, it is not punctured, that is, the time-frequency resources corresponding to the PDSCH rate matching pattern 0, PDSCH rate matching pattern 1 and PDSCH rate matching pattern 2 can be used to transmit PDSCH; when the 2-bit indicator bit contained in the DCI is "01", that is, the rate matching of the time-frequency resource position corresponding to the PDSCH rate matching pattern 2 contained in group2 is effective, that is, the time-frequency resources corresponding to the PDSCH rate matching pattern 2 are punctured, and the rate matching of the time-frequency resource position corresponding to the PDSCH rate matching pattern 0 and PDSCH rate matching pattern 1 contained in group1 is not effective, that is, the time-frequency resources corresponding to the PDSCH rate matching pattern 0 and PDSCH rate matching pattern 1 are not punctured, that is, the PDSCH rate matching pattern 0, the time-frequency resources corresponding to PDSCH rate matching pattern 1 can be used to transmit PDSCH, and the time-frequency resources corresponding to PDSCH rate matching pattern 2 are not used to transmit PDSCH; when the 2-bit indicator bit contained in the DCI is "10", that is, the rate matching of the time-frequency resource position corresponding to PDSCH rate matching pattern 2 contained in group2 is not effective, that is, the time-frequency resources corresponding to PDSCH rate matching pattern 2 are not punctured, and the rate matching of the time-frequency resource position corresponding to PDSCH rate matching pattern 0 and PDSCH rate matching pattern 1 contained in group1 is effective, that is, the time-frequency resources corresponding to PDSCH rate matching pattern 0 and PDSCH rate matching pattern 1 are punctured, that is, the time-frequency resources corresponding to PDSCH rate matching pattern 0 and PDSCH rate matching pattern 1 are not used to transmit PDSCH, and the time-frequency resources corresponding to PDSCH rate matching pattern 2 can be used to transmit PDSCH;When the 2-bit indicator bit in the DCI is "11", the rate matching of the time-frequency resource positions corresponding to PDSCH rate matching pattern 0, PDSCH rate matching pattern 1 and PDSCH rate matching pattern 2 contained in group 1 and group 2 takes effect, that is, punctured, that is, the time-frequency resources corresponding to PDSCH rate matching pattern 0, PDSCH rate matching pattern 1 and PDSCH rate matching pattern 2 are not used to transmit PDSCH; among them, PDSCH rate matching pattern 3 is not included in the pattern group, that is, puncturing is performed by default, that is, the time-frequency resources corresponding to PDSCH rate matching pattern 3 are not used to transmit PDSCH. ;

[0134] To facilitate understanding of the embodiments of the present application, Figure 2 The communication system shown is used as an example to describe in detail a communication system applicable to the method provided in the embodiment of the present application. Figure 2 FIG. 2 shows a schematic diagram of the architecture of a communication system 200 applicable to an embodiment of the present application. Figure 2 As shown, the communication system 200 may include at least one terminal device, such as Figure 2 The terminal devices 203 to 207 shown in the figure. The communication system 200 may also include at least two network devices, such as the network device 201 and the network device 202 shown in the figure, and the information interaction between the network device 201 and the network device 202 is realized through a non-ideal backhaul link (backhaul, BH). In the communication system 200, the network device 201 and the network device 202 can communicate with each other through a BH link, and the BH link can be a wired BH link (such as optical fiber, copper cable) or a wireless BH link (such as microwave). The network device 201 and the network device 202 can cooperate with each other to provide services for the terminal device 203. Therefore, the terminal device 203 can communicate with the network device 201 and the network device 202 respectively through a wireless link. It should be noted that Figure 2 This is only exemplary. In an actual communication system, three or more network devices may cooperate with each other to provide services for the terminal device 203.

[0135] The transmission between mutually coordinated network devices can be divided into ideal backhaul and non-ideal backhaul. For example, the communication delay between two network devices in an ideal backhaul link scenario can be at the microsecond level, which is negligible compared to the millisecond-level data scheduling in NR. The communication delay between two network devices in a non-ideal backhaul can be at the millisecond level, which cannot be ignored compared to the millisecond-level data scheduling in NR.

[0136] As an example, in an ideal backhaul scenario, when multiple network devices send PDSCH to the same terminal device, in order to implement CJT, each network device that participates in providing collaborative transmission for the terminal device transmits its initial scheduling information for pre-scheduling the terminal device to the centralized node through BH. The centralized node determines the scheduling information for CJT based on predefined rules and each initial scheduling information, and transmits the scheduling information to each network device through BH, so that the scheduling information for collaborative transmission provided by the multiple network devices for the same terminal device remains consistent.

[0137] like Figure 3 As shown, network device 1 and network device 2 respectively perform initial pre-scheduling on the terminal device to determine the corresponding pre-scheduling information (e.g., first pre-scheduling information and second pre-scheduling information) to complete the selection or allocation of wireless resources. Network device 1 and network device 2 respectively transmit the first pre-scheduling information and the second pre-scheduling information to the centralized node through BH, and the centralized node determines the scheduling information for CJT based on the first pre-scheduling information and the second pre-scheduling information, and then transmits the scheduling information to network device 1 and network device 2 respectively through BH, and network device 1 and network device 2 respectively update the scheduling information sent by the centralized node, for example, network device 1 and network device 2 respectively update the first pre-scheduling information and the second pre-scheduling information to the scheduling information received from the centralized node, and send downlink data to the terminal device according to the scheduling information.

[0138] It should be understood that Figure 3 In the method shown, the centralized node determines the scheduling information of multiple network devices for CJT, and the BH interacts with them. However, in non-ideal BH scenarios, BH has the characteristics of high latency and low bandwidth. For example, the typical value of BH latency is 4ms. Therefore, based on the above Figure 3 The delay in determining the scheduling information for CJT is at least 8ms. Therefore, network device 1 and network device 2 need to perform initial pre-scheduling of the terminal device 8ms in advance. However, when network device 1 and network device 2 perform initial pre-scheduling of the terminal device 8ms in advance, they cannot accurately estimate the service load status of network device 1 and network device 2 8ms later and the channel status between network device 1 and the terminal device, and between network device 2 and the terminal device, resulting in the inability to guarantee the data transmission performance of CJT.

[0139] In a non-ideal backhaul scenario, when multiple network devices collaborate with terminal devices for transmission, the backhaul delay of information interaction between multiple network devices is relatively large, that is, there is a large delay in the process of unifying scheduling information through interaction between network devices. Therefore, it is difficult to implement CJT in a network communication system with a non-ideal backhaul link.

[0140] In view of this, the present application provides a resource indication method for collaborative transmission, which is mainly used in non-ideal backhaul wireless communication networks, such as the Internet Protocol-based Radio Access Network (internet protocol RAN) networking scenario in NR. The communication process occurs between network devices and terminal devices, and involves multiple network devices transmitting data for the same terminal device through CJT.

[0141] The method for resource indication of cooperative transmission provided by the present application is that the main network device (also called the main base station, the main station) and the cooperative network device (also called the cooperative base station, the cooperative station, the secondary base station, the secondary station) send the initial scheduling information to the terminal device, and the terminal device determines the scheduling information for coherent joint transmission according to the initial scheduling information of each network device, and sends the scheduling information to each network device. Each network device performs scheduling updates based on the scheduling information sent by the terminal device, and transmits downlink data based on the scheduling information sent by the terminal device, ensuring that the same time-frequency resources are used to transmit data to the same terminal device during coherent cooperative transmission between each network device, so that data transmission performance is improved.

[0142] In order to facilitate understanding of the embodiments of the present application, the following explanations are made.

[0143] First, in the embodiments of the present application, "used for indication" may include being used for direct indication and being used for indirect indication, and may also include explicit indication and implicit indication. The information indicated by a certain information (such as the indication information, indication field, configuration information, etc. described below) is called information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, directly indicating the information to be indicated, such as the information to be indicated itself or the index of the information to be indicated. The information to be indicated may also be indirectly indicated by indicating other information, wherein the other information has an association relationship with the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while the other parts of the information to be indicated are known or agreed in advance. For example, the indication of specific information may also be achieved by means of the arrangement order of each information agreed in advance (such as specified by the protocol), thereby reducing the indication overhead to a certain extent.

[0144] Second, the first, second and various digital numbers in the embodiments shown below are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application. For example, to distinguish different indication information.

[0145] Third, in the embodiments shown below, "pre-acquisition" or "pre-setting" may include being indicated by network device signaling or being pre-defined (e.g., defined by a protocol); it may be defined by a communication protocol and configured in the access network device and terminal device of both parties of the communication, or it may be determined by the network device and configured to the terminal device, where the configuration may be displayed through signaling or implicitly configured through other information. Among them, "pre-definition" may be implemented by pre-saving corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., including a terminal device and a network device), and this application does not limit its specific implementation method.

[0146] Fourthly, the method for collaborative transmission resource indication provided in the present application is applicable not only to TDD communication systems, but also to FDD communication systems.

[0147] Fifth, in an embodiment of the present application, collaborative transmission is involved, and collaborative transmission may include CJT and coherent joint receiving (CJR). CJT is downlink data transmission in collaborative transmission, and CJR is uplink data transmission in collaborative transmission. In this application, CJT downlink data transmission is mainly used as an example to exemplarily introduce the method provided by this application.

[0148] The resource indication method for collaborative transmission provided in the present application is described in detail below in conjunction with the accompanying drawings. Since one or more network devices in a wireless communication system can provide services for the same terminal device, any network device in the wireless communication system that serves the same terminal device can communicate with the terminal device based on the resource indication method for collaborative transmission provided in the present application. Among them, the communication between the network device and the terminal device may include the network device sending downlink data to the terminal device (downlink communication), and the terminal device sending uplink data to the network device (uplink communication), which are all applicable to the resource indication method for collaborative transmission provided in the present application.

[0149] Next, the resource indication method for collaborative transmission provided in an embodiment of the present application will be described in detail by taking a scenario in which multiple network devices communicate with the same terminal device and the multiple network devices send downlink data to the same terminal device as an example.

[0150] Figure 4 It is a schematic flowchart of a resource indication method for collaborative transmission provided in an embodiment of the present application.

[0151] It should be understood that when only one of the multiple network devices participating in the collaborative transmission performs initial scheduling, or when two or more of the multiple network devices participating in the collaborative transmission perform initial scheduling, how to ensure that the multiple network devices use the same time-frequency resources to transmit PDSCH to the terminal device in the CJT mechanism. This application will introduce the method provided by this application in detail in combination with the following two situations:

[0152] Case 1: Among multiple network devices participating in cooperative transmission, only one network device performs initial scheduling.

[0153] Case 2: Two or more network devices among the multiple network devices participating in the collaborative transmission have performed initial scheduling.

[0154] It should be understood that for the above two situations, the following takes the multiple network devices including the first network device and the second network device as an example, that is, the first network device and the second network device are both network devices participating in the cooperative transmission of the terminal device, how to ensure that the first network device and the second network device transmit PDSCH to the terminal device on the same resources in the CJT mechanism. Next, the above two situations will be combined, and Figure 4 The method shown is exemplarily described as follows:

[0155] For situation 1:

[0156] Only one of the multiple network devices participating in the cooperative transmission performs initial scheduling. Assume that the multiple network devices include a first network device and a second network device. Assume that the first network device performs initial scheduling, and the second network device does not perform initial scheduling. Figure 4 As shown, the method may include the following steps:

[0157] 401. A first network device sends first information to a terminal device.

[0158] Specifically, the first network device sends the first information to the terminal device. Correspondingly, the terminal device receives the first information from the first network device.

[0159] It should be understood that the first network device determines the first information through initial scheduling and sends the first information to the terminal device. The first information is used to indicate the first PDSCH rate matching and the first time offset, and the first time offset is the offset between the time unit where the first information is sent and the time unit where the first PDSCH rate matching is. Figure 5As shown, it is assumed that the first network device performs initial scheduling to determine the first information at time slot 0 in the first time period, and sends the first information to the terminal device at time slot 1 in the first time period. The first network device performs PDSCH rate matching at time slot 0 in the second time period and sends PDSCH to the terminal device, that is, the time unit where the PDSCH rate matching occurs is time slot 0 in the second time period. The first time offset is the offset between time slot 1 in the first time period where the first information is located and time slot 0 in the second time period where the PDSCH rate matching occurs. In this application, the first time offset is the offset between time slot 1 in the first time period where the first information is located and time slot 0 in the second time period where the PDSCH rate matching occurs. Taking the first time offset as an example, the first time offset is 4 time slots, that is,

[0160] In a possible implementation manner, the first information includes a first index. The first index corresponds to the first PDSCH rate matching and the first time offset, and the first index is used to indicate a corresponding relationship between the first PDSCH rate matching and the first time offset.

[0161] It should be understood that the terminal device may be predefined, or preconfigured, or the first network device may indicate one or more correspondences between the first PDSCH rate match and the first time offset through indication information, and the one or more correspondences between the first PDSCH rate match and the first time offset may be represented in the form of a table / list. The first information may include a first index corresponding to a correspondence in the table / list, and the terminal device can determine the first PDSCH rate match and the first time offset based on the first index and the one or more correspondences, without directly indicating the first PDSCH rate match and the first time offset. By indicating the index of the correspondence between the first PDSCH rate match and the first time offset, the signaling overhead can be reduced.

[0162] As an example, it is assumed that the terminal device is predefined with multiple corresponding relationships between the first PDSCH rate matching and the first time offset, and the multiple corresponding relationships are represented in the form of a table, as shown in Table 3:

[0163] Table 3

[0164]

[0165] As shown in Table 3 above, assuming that the terminal device is predefined in Table 3 above, for example, when the value of the first index in the first information is "4", the terminal device determines the first time offset according to the first index "4" and Table 3. The resources corresponding to the PDSCH rate matching in PDSCH rate matching group 1 and PDSCH rate matching group 2 are all punctured, that is, the time-frequency resources corresponding to the PDSCH rate matching pattern included in PDSCH rate matching group 1 and PDSCH rate matching group 2 are not used to transmit PDSCH. For example, when the value of the first index in the first information is "6", that is, the terminal device determines the first time offset according to the first index "6" and Table 3 The resources corresponding to the PDSCH rate matching in PDSCH rate matching group1 are not punctured, that is, the time-frequency resources corresponding to the PDSCH rate matching pattern included in PDSCH rate matching group1 can be used to transmit PDSCH; the resources corresponding to the PDSCH rate matching in PDSCH rate matching group2 are punctured, that is, the time-frequency resources corresponding to the PDSCH rate matching pattern included in PDSCH rate matching group2 are not used to transmit PDSCH.

[0166] It should be understood that the above Table 3 exemplifies the case where the value range of the first time offset is [4,6], and lists some possible values ​​of the first time offset. In actual applications, assuming that the value range of the first time offset is [N1,N2], the value of the first time offset includes N2-N1+1 possible values. In this case, the number of rows in the above Table 3 can be (N2-N1+1)×2 M rows, where M is the number of PDSCH rate matching groups. In this case, the row index of the table (such as the first index) is available. bits to represent, where Indicates a round-up operation.

[0167] Exemplarily, when N2=6, N1=2, and M=4, the first index can be represented by 5 bits.

[0168] It should also be understood that in different duplex modes, the value range of the first time offset is different.

[0169] Exemplarily, in the TDD duplex mode, the value range of the first time offset can be determined according to the TDD uplink and downlink time slot ratio. For example, in the TDD duplex mode, the maximum value of the first time offset can satisfy the following formula (1), and the minimum value of the first time offset can satisfy the following formula (2):

[0170] Maximum value = 2 × (number of special time slots + number of downlink time slots) + number of uplink time slots - 1 Formula (1)

[0171] Minimum value = number of uplink time slots + 1 Formula (2)

[0172] Among them, the number of uplink time slots, the number of special time slots, and the number of downlink time slots described in the above formula (1) and formula (2) are all based on a time period as a reference, that is, the number of uplink time slots is the number of uplink time slots in a time period, the number of downlink time slots is the number of downlink time slots in a time period, and the number of special time slots is the number of special time slots in a time period.

[0173] For example, taking the TDD frame ratio of 4:1 and each subframe including one time slot as an example, the value range of the first time offset is [2,8]; taking the TDD frame ratio of 8:2 and each subframe including one time slot as an example, the value range of the first time offset is [3,17].

[0174] In another possible implementation manner, the first information includes a first field, where the first field is used to indicate a first PDSCH rate matching and a first time offset.

[0175] It should be understood that the first network device can add a new field (for example, the first field) to the existing downlink information, and use the new field to indicate the first PDSCH rate matching and the first time offset, without having to indicate the first PDSCH rate matching and the first time offset by adding new signaling information, thereby saving signaling overhead and achieving better compatibility with existing signaling.

[0176] As an example, the first network device adds a first field to the existing downlink information, and indicates the first PDSCH rate matching and the first time offset through the first field. Assume that the downlink information is the first DCI, that is, the first field is added to the first DCI. The field structure of the first DCI is as follows: Figure 6 As shown, the first field can be increased to Figure 6 The first network device adds a first field in the existing first DCI to indicate the first PDSCH rate matching and the first time offset, thereby saving the signaling overhead of the first network device and achieving better compatibility with the existing signaling.

[0177] It should also be understood that the first network device may also indicate the first PDSCH rate matching and the first time offset through separate signaling information.

[0178] As another example, the first network device adds a new field in the existing downlink information to indicate the first PDSCH rate matching and the first time offset. Assuming that the downlink information is the first DCI, the existing field of the first DCI includes a first PDSCH rate matching indication field. The first network device can use the existing first PDSCH rate matching indication field in the first DCI to indicate the first PDSCH rate matching, and add a fourth field to the existing first DCI, where the fourth field is used to indicate the first time offset. By multiplexing the first PDSCH rate matching indication field in the existing first DCI and adding a fourth field to the first DCI to indicate the first PDSCH rate matching and the first time offset, the signaling overhead of the network device is saved, while achieving better compatibility with existing signaling.

[0179] 402. The terminal device sends second information to the second network device according to the first information.

[0180] Specifically, the terminal device receives the first information from the first network device, determines the second information according to the first information, and sends the second information to the second network device. Correspondingly, the second network device receives the second information from the terminal device.

[0181] It should be understood that the second information is used to indicate the second PDSCH rate matching and the second time offset, and the second time offset is the offset between the time unit where the second information is sent and the time unit where the second PDSCH rate matching is located. The second PDSCH rate matching is determined according to the first PDSCH rate matching, and the second time offset is determined according to the first time offset.

[0182] It should also be understood that the second network device does not perform initial scheduling, that is, after the terminal device receives the first information from the first network device, it determines the second information based on the first information and sends the second information to the second network device.

[0183] As an example, the terminal device receives the first information of the first network device, and the terminal device determines the second PDSCH rate match according to the first PDSCH rate match indicated by the first information, and determines the second time offset according to the first time offset indicated by the first information. The first PDSCH rate match is the same as the second PDSCH rate match, and the first time offset is different from the second time offset. The offset between the time unit where the first information is located and the time unit where the first PDSCH rate match is located is greater than the offset between the time unit where the second information is located and the time unit where the second PDSCH rate match is located. The time unit where the first PDSCH rate match is located is the same as the time unit where the second PDSCH rate match is located, and the time unit where the first information is located is before the time unit where the second information is located, that is, the first time offset is greater than the second time offset.

[0184] In a possible implementation, the second information includes a second index. The second index corresponds to the second PDSCH rate matching and the second time offset, and the second index is used to indicate a corresponding relationship between the second PDSCH rate matching and the second time offset.

[0185] It should be understood that the terminal device and the second network device may be predefined or preconfigured, or the first network device may indicate one or more correspondences between the second PDSCH rate matching and the second time offset through indication information, and the one or more correspondences between the second PDSCH rate matching and the second time offset may be represented in the form of a table / list. The second information may include a second index corresponding to a correspondence in the table / list, and the second network device may determine the second PDSCH rate matching and the second time offset based on the second index and the one or more correspondences, without indicating the second PDSCH rate matching and the second time offset. By indicating the index of the correspondence between the second PDSCH rate matching and the second time offset, the signaling overhead can be reduced.

[0186] As an example, it is assumed that the terminal device and the second network device are predefined with multiple corresponding relationships between the second PDSCH rate matching and the second time offset, and the multiple corresponding relationships are represented in the form of a table, as shown in Table 4:

[0187] Table 4

[0188]

[0189] As shown in Table 4 above, it is assumed that the terminal device is predefined in Table 4 above. For example, when the value of the second index in the second information is "3", the second network device determines that the second time offset is 3 according to the second index "3" and Table 3. The second time offset in this application is For example, The resources corresponding to the PDSCH rate matching group 1 are punctured, and the resources corresponding to the PDSCH rate matching group 2 are not punctured, that is, the time-frequency resources corresponding to the PDSCH rate matching pattern included in the PDSCH rate matching group 1 are not used to transmit the PDSCH, and the time-frequency resources corresponding to the PDSCH rate matching pattern included in the PDSCH rate matching group 2 can be used to transmit the PDSCH. For example, when the value of the second index in the second information is "5", that is, the second network device determines the second time offset according to the second index "5" and Table 4 The resources corresponding to the PDSCH rate matching in PDSCH rate matching group 1 and PDSCH rate matching group 2 are not punctured, that is, the time-frequency resources corresponding to the PDSCH rate matching pattern included in PDSCH rate matching group 1 and PDSCH rate matching group 2 can be used to transmit PDSCH.

[0190] It should be understood that the above Table 4 exemplifies the range of the second time offset as [3,5] and lists some possible values ​​of the first time offset. In practical applications, assuming that the range of the second time offset is [N1,N2], the values ​​of the second time offset include There are possibilities. At this time, the number of rows in the above Table 4 can be Row, where M is the number of PDSCH rate matching, the row index (second index) of Table 4 can be represented by M+N2-N1+1 bits.

[0191] It should also be understood that the second time offset At least one time offset value may be included. When the second time offset includes one time offset, as shown in Table 4 above; when the second time offset includes multiple (2 or more) time offsets, as shown in Table 5:

[0192] Table 5

[0193]

[0194] It should be understood that the above Table 5 is similar to the above Table 4, and the specific description can refer to the introduction of the above Table 4. In particular, the second time offset in the above Table 5 is It can include multiple time offsets. For example, when the value of the second index is "5", and 4, when the value of the second index is "11", 4 and 5. When the terminal device sends the second index to the second network device, the second network device PDSCH is sent at each time offset of at least one time offset included in.

[0195] It should also be understood that in TDD mode, before the uplink time slot for the terminal device to send the second information to the second network device arrives, the first network device can perform one or more initial scheduling, that is, one or more first information corresponding to one or more initial schedulings can be sent to the terminal device through the downlink time slot, and the terminal device determines the second information based on the one or more first information and sends it to the second network device on the uplink time slot, that is, the second time offset includes at least one time offset, and the at least one time offset is determined based on one or more first information determined by the first network device in one or more initial schedulings.

[0196] In another possible implementation manner, the second information includes a second field, where the second field is used to indicate a second PDSCH rate matching and a second time offset.

[0197] It should be understood that the terminal device can add a new field (such as the second field) to the existing uplink information, and indicate the second PDSCH rate matching and the second time offset through the newly added field. The terminal device indicates the second PDSCH rate matching and the second time offset by adding a second field to the existing uplink information, without indicating the second PDSCH rate matching and the second time offset through separate signaling information, thereby saving signaling overhead and achieving better compatibility with existing signaling.

[0198] As an example, the terminal device adds a second field to the existing uplink information, and indicates the second PDSCH rate matching and the second time offset through the second field. Assuming that the uplink information is UCI, the second field is added to the UCI. The field structure of the UCI is as follows: Figure 7 As shown, the second field is added to the existing UCI structure, and the specific position of the second field in the UCI is not limited in this application.

[0199] It should also be understood that the terminal device may also indicate the second PDSCH rate matching and the second time offset through separate signaling information.

[0200] It should also be understood that when the terminal device receives the first information from the device on the first network in step 401, and the first information indicates the first PDSCH rate matching and the first time offset in the form of a first index, the second information sent by the terminal device to the second network device in step 402 may also indicate the second PDSCH rate matching and the second time offset in the form of a second index; when the terminal device receives the first information from the device on the first network in step 401, and the first information indicates the first PDSCH rate matching and the first time offset in the first field, the second information sent by the terminal device to the second network device in step 402 may also indicate the second PDSCH rate matching and the second time offset in the second field.

[0201] 403. The first network device sends a PDSCH to the terminal device, and the second network device sends a PDSCH to the terminal device.

[0202] Specifically, the first network device sends PDSCH to the terminal device according to the first PDSCH rate matching and the first time offset indicated by the first information determined in its initial scheduling. The second network device sends PDSCH to the terminal device according to the second PDSCH rate matching and the second time offset indicated by the second information received from the terminal device.

[0203] Among them, the first network device sends PDSCH to the terminal device according to the first PDSCH rate matching and the first time offset. The second network device sends PDSCH to the terminal device according to the second PDSCH rate matching and the second time offset. The first PDSCH rate matching and the second PDSCH rate matching are the same. The first time offset is different from the second time offset, and the time unit where the first PDSCH rate matching is located is the same as the time unit where the second PDSCH rate matching is located, that is, the first network device and the second network device send PDSCH to the terminal device on the same resource.

[0204] As an example, Figure 5As shown, it is assumed that the time unit where the first information is located is time slot 1 in the first time period, and the time unit where the first PDSCH rate matching is located is time slot 0 in the second time period, that is, the first time offset is 4 time slots; it is assumed that the time unit where the second information is located is time slot 4 in the first time period, and the time unit where the second PDSCH rate matching is located is time slot 0 in the second time period, that is, the second time offset is 1 time slot. It can be understood that the first time offset is different from the second time offset, and the time unit where the first PDSCH rate matching is located is the same as the time unit where the second PDSCH rate matching is located, both of which are time slot 0 in the second time period. The PDSCH rate matching of the first network device and the second network device both send PDSCH to the terminal device at time slot 0 in the second time period, and the first PDSCH rate matching is the same as the second PDSCH rate matching.

[0205] Based on the method shown in the above situation 1, in a scenario where multiple network devices cooperate in transmission, only one network device among the multiple network devices performs initial scheduling, and the terminal device determines the second information based on the information (for example, the first information) determined by the network device that performs initial scheduling. The terminal device sends the second information to other network devices that have not performed initial scheduling. The second PDSCH rate match in the second information is determined based on the first PDSCH rate match in the first information, and the second time offset is determined based on the first time offset in the first information. The multiple network devices that have not performed initial scheduling send PDSCH to the terminal device based on the second information, and the network device that performs initial scheduling sends PDSCH to the terminal device based on the first information, thereby ensuring that the multiple network devices send PDSCH to the terminal device on the same resources.

[0206] For situation 2:

[0207] There are two or more network devices among the multiple network devices participating in the collaborative transmission to perform initial scheduling. It is assumed that the multiple network devices include a first network device and a second network device, and both the first network device and the second network device perform initial scheduling. Figure 4 As shown, the method may include the following steps:

[0208] 401', the first network device sends first information to the terminal device.

[0209] Specifically, the first network device sends the first information to the terminal device. Correspondingly, the terminal device receives the first information from the first network device.

[0210] It should be understood that the first network device determines the first information through initial scheduling and sends the first information to the terminal device. The first information is used to indicate the first PDSCH rate matching and the first time offset, and the first time offset is the offset between the time unit where the first information is located and the time unit where the first PDSCH rate matching is located.

[0211] In a possible implementation manner, the first information includes a first index, where the first index is used to indicate a correspondence between a first PDSCH rate matching and a first time offset.

[0212] In another possible implementation manner, the first information includes a first field, where the first field is used to indicate a first PDSCH rate matching and a first time offset.

[0213] It should be understood that step 401 ′ is similar to step 401 in the above situation 1, and the details can be found in the detailed description of step 401 above.

[0214] 402', the second network device sends third information to the terminal device.

[0215] Specifically, the second network device sends the third information to the terminal device. Correspondingly, the terminal device receives the third information from the second network device.

[0216] It should be understood that the second network device determines the third information through initial scheduling and sends the third information to the terminal device. The third information is used to indicate the third PDSCH rate matching and the third time offset, and the third time offset is the offset between the time unit where the third information is located and the time unit where the third PDSCH rate matching is located. Figure 5 As shown, it is assumed that the second network device performs initial scheduling to determine the third information in time slot 1 in the first time period, and sends the third information to the terminal device in time slot 2, that is, the time slot where the third information is transmitted is time slot 2, and the second network device performs PDSCH rate matching in time slot 0 of the second time period and sends PDSCH to the terminal device, that is, the time unit where the PDSCH rate matching is located is time slot 0 of the second time period, that is, the third time offset is the offset between time slot 2 where the third information is located and time slot 0 where the PDSCH rate matching is located, that is, the third time offset can be

[0217] It should also be understood that the second network device and the first network device can be initially scheduled in the same time slot, and the first information and the third information can be sent to the terminal device in the same time slot. When the third information and the first information are sent to the terminal device in the same time slot, the third time offset is the same as the second time offset.

[0218] In a possible implementation manner, the third information includes a third index, which corresponds to the third PDSCH rate matching and the third time offset, and the third index is used to indicate the corresponding relationship between the third PDSCH rate matching and the third time offset.

[0219] It should be understood that the terminal device may be predefined, or preconfigured, or the third network device may indicate one or more correspondences between the third PDSCH rate matching and the third time offset through indication information, and the one or more correspondences or corresponding rules between the third PDSCH rate matching and the third time offset may be represented in the form of a table / list. The third information may include a third index corresponding to one or more correspondences in the table / list, and the terminal device can determine the third PDSCH rate matching and the third time offset based on the third index and the one or more correspondences, without directly indicating the third PDSCH rate matching and the third time offset. By indicating the index of the correspondence between the third PDSCH rate matching and the third time offset, the signaling overhead can be reduced.

[0220] Among them, it is assumed that the terminal device is predefined with the correspondence between the third PDSCH rate matching and the third time offset. When the correspondence is expressed in the form of a table, it is similar to the above Table 3. For details, please refer to the above detailed description of Table 3. Among them, the first PDSCH rate matching and the first time offset in Table 3 are replaced with the third PDSCH rate matching and the third time offset, which will not be repeated here.

[0221] In another possible implementation manner, the third information includes a third field, where the third field is used to indicate a third PDSCH rate matching and a third time offset.

[0222] It should be understood that the second network device can add a new field (for example, the third field) to the existing downlink information, and indicate the third PDSCH rate matching and the third time offset through the new field, without having to indicate the third PDSCH rate matching and the third time offset through new signaling information, thereby saving signaling overhead and achieving better compatibility with existing signaling.

[0223] As an example, the second network device adds a third field to the existing downlink information, and uses the third field to indicate the third PDSCH rate matching and the third time offset. Assuming that the downlink information is the second DCI, the third field is added to the second DCI information, wherein the field structure of the second DCI is as follows: Figure 6 As shown, the details are similar to those in step 401 in the above situation 1, please refer to the above detailed introduction.

[0224] It should also be understood that the second network device may also indicate the third PDSCH rate matching and the third time offset through separate signaling information.

[0225] As another example, the second network device adds a new field in the existing downlink information to indicate the third PDSCH rate matching and the third time offset. Assuming that the downlink information is the second DCI, the existing field of the second DCI includes a second PDSCH rate matching indication field. The second network device can use the existing second PDSCH rate matching indication field in the second DCI to indicate the third PDSCH rate matching, and add a fifth field to the existing second DCI, and the fifth field is used to indicate the third time offset. By multiplexing the second PDSCH rate matching indication field in the existing second DCI and adding a fifth field to the second DCI to indicate the third PDSCH rate matching and the third time offset, the signaling overhead of the network device is saved, and better compatibility with existing signaling is achieved.

[0226] 403', the terminal device sends the second information to the first network device and the second network device according to the first information and the third information.

[0227] Specifically, after receiving the first information from the first network device and the third information from the second network device, the terminal device determines the second information according to the first information and the third information, and sends the second information to the first network device and the second network device. Correspondingly, the first network device and the second network device receive the second information from the terminal device.

[0228] It should be understood that the second information is used to indicate the second PDSCH rate matching and the second time offset, and the second time offset is the offset between the time unit where the second information is sent and the time unit where the second PDSCH rate matching is located. The second PDSCH rate matching is determined according to the first PDSCH rate matching and the third PDSCH rate matching, and the second time offset is determined according to the first time offset and the third time offset.

[0229] It should also be understood that the first network device and the second network device both perform initial scheduling, and send the first information and the third information determined by the initial scheduling to the terminal device respectively. The terminal device performs resource alignment according to the first information and the third information to determine the second information.

[0230] As an example, assume that the PDSCH rate matching group1 included in the first PDSCH rate matching in the first information is punctured, and the PDSCH rate matching group2 is not punctured, that is, the PDSCH rate matching group1 included in the first PDSCH rate matching cannot be used to transmit PDSCH, and the PDSCH rate matching group2 can be used to transmit PDSCH; the PDSCH rate matching group1 included in the third PDSCH rate matching in the third information is not punctured, and the PDSCH rate matching group2 is not punctured, that is, the PDSCH rate matching group1 and the PDSCH rate matching group2 included in the third PDSCH rate matching can both be used to transmit PDSCH. The terminal device determines the second PDSCH rate matching according to the first PDSCH rate matching and the third PDSCH rate matching, and the PDSCH rate matching group1 included in the second PDSCH rate matching is punctured, and the PDSCH rate matching group2 is not punctured, that is, the PDSCH rate matching group1 included in the second PDSCH rate matching cannot be used to transmit PDSCH, and the PDSCH rate matching group2 can be used to transmit PDSCH.

[0231] As another example, the third time offset in this application is For example, assuming that the first time offset in the first information is The third time offset in the third information is: The terminal device is based on the first time offset Determine the new time unit The terminal device uses the third time offset Generate a new time unit The terminal device determines the second time offset according to the new time unit corresponding to the first time offset and the new time unit corresponding to the third time offset. 4. The terminal device uses the first time offset Determine the new time unit The new time unit It is based on the time unit where the second information is located and the first time offset The first PDSCH rate matching indicated in is determined by the time unit where the terminal device matches the third time offset. Determine the new time unit The new time unit It is based on the time unit where the second information is located and the third time offset The third PDSCH rate matching indicated in is determined by the time unit in which it occurs.

[0232] In a possible implementation, the second information includes a second index. The second index corresponds to the second PDSCH rate matching and the second time offset, and the second index is used to indicate a corresponding relationship between the second PDSCH rate matching and the second time offset.

[0233] It should be understood that the terminal device, the first network device and the second network device may be predefined or preconfigured with respect to the correspondence between the second PDSCH rate matching and the second time offset, and the correspondence between the second PDSCH rate matching and the second time offset may be represented in the form of a table / list. The second information may indicate an index corresponding to the table / list, and the terminal device determines the second PDSCH rate matching and the second time offset according to the second index in the second information.

[0234] Among them, it is assumed that the terminal device, the first network device and the second network device are predefined with the correspondence between the second PDSCH rate matching and the second time offset. When the correspondence is expressed in the form of a table, it is similar to the above Table 4 and Table 5. For details, please refer to the above detailed introduction of Table 4 and Table 5.

[0235] In another possible implementation, the second information includes a second field, and the second field is used to indicate the second PDSCH rate matching and the second time offset. For a detailed introduction to this implementation, please refer to the introduction to step 402 in the above situation 1.

[0236] It should be understood that the terminal device can add a new field (such as a second field) to the existing uplink information, and use the newly added field to indicate the second PDSCH rate matching and the second time offset.

[0237] It should also be understood that the terminal device may also indicate the second PDSCH rate matching and the second time offset through separate signaling information.

[0238] The second time offset should also be understood that in step 401', the terminal device receives the first information of the device on the first network, and the first information indicates the first PDSCH rate matching and the first time offset in the form of the first index. In step 402', the terminal device receives the third information of the device on the second network, and the third information indicates the third PDSCH rate matching and the third time offset in the form of the third index. In step 403', the terminal device sends the second information to the first network device and the second network device, and the second information can also indicate the second PDSCH rate matching and the second time offset in the form of the second index; or, in step 401', the terminal device receives the first information of the device on the first network, and the first information indicates the first PDSCH rate matching and the first time offset through the first field. In step 402', the terminal device receives the third information of the device on the second network, and the third information indicates the third PDSCH rate matching and the third time offset through the third field. In step 403', the terminal device sends the second information to the first network device and the second network device, and the second information can also indicate the second PDSCH rate matching and the second time offset through the second field.

[0239] 404', the first network device sends a PDSCH to the terminal device, and the second network device sends a PDSCH to the terminal device.

[0240] Specifically, the first network device receives the second information from the terminal device, and sends the PDSCH to the terminal device according to the second information. The second network device receives the second information sent from the terminal device, and sends the PDSCH to the terminal device according to the second information.

[0241] The first network device sends the PDSCH to the terminal device according to the second PDSCH rate matching and the second time offset. The second network device sends the PDSCH to the terminal device according to the second PDSCH rate matching and the second time offset. That is, the first network device and the second network device send the PDSCH to the terminal device on the same resource.

[0242] Based on the method shown in the above situation 2, in a scenario where multiple network devices cooperate in transmission, there are more than or equal to 2 network devices among the multiple network devices that perform initial scheduling, and the terminal device determines the second information based on the information (such as the first information and the third information) determined by the initial scheduling of the multiple network devices. The terminal device sends the second information to the multiple network devices. The second PDSCH rate match in the second information is determined based on the first PDSCH rate match in the first information and the third PDSCH rate match in the third information, and the second time offset is determined based on the first time offset in the first information and the third time offset in the third information. The multiple network devices send PDSCH to the terminal device through the second information, thereby ensuring that the multiple network devices use the same resources to send PDSCH to the terminal device.

[0243] According to the above Figure 4 The method shown, in a scenario where multiple network devices send PDSCH to the same terminal device through collaborative transmission, is divided into Case 1 and Case 2 according to the number of network devices that perform initial scheduling among the multiple network devices, that is, Case 1 is used to indicate how to align the resources of the multiple network devices for transmitting PDSCH to the terminal device when only one network device among the multiple network devices performs initial pre-scheduling; Case 2 is used to indicate how to align the resources of the multiple network devices for transmitting PDSCH to the terminal device when multiple (greater than or equal to 2) network devices among the multiple network devices perform initial pre-scheduling. According to the above Cases 1 and 2, in the scenario of a non-ideal backhaul link, the terminal devices can align the transmission resources of the multiple network devices to ensure the performance of data transmission.

[0244] It should be understood that the above Figure 4 The method shown is only an example. Figure 4 The method shown may also include multiple network devices (e.g., network device #1, network device #2, ..., network device #Q) jointly participating in the collaborative transmission of the terminal device, where Q is an integer greater than 2. In case one, network device #1 sends first information to the terminal device; the terminal device may send second information to other network devices among the Q network devices except network device #1, that is, send second information to network device #2 to network device #Q. In case two, at least two of the Q network devices perform initial scheduling. The at least two network devices may be some or all of the Q network devices, for example, network device #1 and network device #2, or network device #1 to network device #Q. The terminal device sends the determined second information to the Q network devices.

[0245] It should also be understood that according to the above Figure 4 The method shown below will be combined with Figure 8 A flowchart illustrating an exemplary method of aligning PDSCH rate matching resource locations of multiple network devices.

[0246] Combination Figure 4 In case 1, Figure 8 As shown in (1), the first network device performs initial scheduling and sends the first information determined by the initial scheduling to the terminal device, and the terminal device sends the second information to the second network device according to the first information. The first network device sends the PDSCH to the terminal device according to the first information, and the second network device sends the PDSCH to the terminal device according to the second information.

[0247] It should be understood that in TDD mode, before the terminal device sends the second information to the second network device, that is, before the uplink time slot in which the terminal device sends the second information to the second network device, the first network device can perform multiple initial scheduling and send multiple first information to the terminal device in the downlink time slot. The terminal device determines the second information based on the multiple first information and sends the second information to the second network device.

[0248] It should also be understood that in FDD mode, after the terminal device receives the first information from the first network device, it sends the second information to the second network device according to the first information in the next time unit (for example, the next time slot) after receiving the first information, without waiting for the arrival of the uplink time slot. In the scenario of collaborative transmission of multiple network devices, the interactive delay of information transmission is reduced and the transmission performance is improved.

[0249] Combination Figure 4 In case 2, Figure 8 As shown in (2), the first network device and the second network device both perform initial scheduling, and send the first information and the third information determined by the initial scheduling to the terminal device. The terminal device sends the second information to the first network device and the second network device according to the first information and the third information. The first network device and the second network device update the scheduling information according to the second information, and send the PDSCH to the terminal device according to the second information.

[0250] It should be understood that in TDD mode, before the terminal device sends the second information to the first network device and the second network device, that is, before the uplink time slot in which the terminal device sends the second information to the first network device and the second network device, the first network device and the second network device can perform multiple initial scheduling and send multiple first information and third information to the terminal device in the downlink time slot. The terminal device determines the second information based on the multiple first information and third information, and sends the second information to the second network device.

[0251] It should also be understood that in FDD mode, after the terminal device receives the first information from the first network device and the third information from the second network device, it sends the second information to the first network device and the second network device in the next time unit (for example, the next time slot) based on the first information and the third information without waiting for the arrival of the uplink time slot. In the scenario of collaborative transmission of multiple network devices, the interactive delay of information transmission is reduced and the transmission performance is improved.

[0252] It should be noted that the names of the first information and the third information in this application are only exemplary, and other names may also be used, such as scheduling information, starting scheduling information, initial scheduling information, pre-scheduling information, etc. This application does not limit this.

[0253] In the embodiment of the present application, the first network device is a network device that sends the first information to the terminal device, the N network devices are network devices participating in the cooperative transmission, the N network devices include the first network device, and N is a positive integer greater than or equal to 2. Optionally, the N network devices participating in the cooperative transmission are determined according to the channels between each network device and the terminal device, or according to the positions of each network device, or according to a standard preset rule.

[0254] It should be understood that the determination of the N network devices participating in the cooperative transmission is only an example and not a limitation. It should also be understood that for the cooperative transmission of CJT, the N network devices participating in the cooperative transmission obtain and save the data to be sent to the terminal device.

[0255] In addition, the first network device can be referred to as a master network device, and the other network devices can be referred to as collaborative network devices, for example, the second network device can become a collaborative network device. Exemplarily, among the N collaborative transmission network devices, a network device with the largest reference signal receiving power (RSRP) intensity received by the terminal device can be used as the master network device, and the other devices can be used as collaborative network devices; or, a network device closest to the terminal device can be used as the master network device, and the other devices can be used as collaborative network devices. It should be understood that the above-mentioned method of determining the master network device is only an example and not a limitation.

[0256] It should be understood that the first network device can determine the first information of the first network device according to the service load status of the network device itself, the real-time service demand of the terminal device, and one or more of the channel conditions between the network device and the terminal device. Alternatively, after the N network devices exchange their respective channel statistical information with the terminal device through non-ideal BH (for example, the channel covariance matrix corresponding to the transmission channel between each network device and the terminal device), the first network device determines the first information according to the service load status of the network device itself, the real-time service demand of the terminal device, the channel state information between the first network device and the terminal device, and the channel state information between other network devices and the terminal device. The second network device performs initial pre-scheduling and determines the third information similarly to the determination of the first information by the first network device mentioned above.

[0257] It is understandable that in order to implement the functions in the above embodiments, the network device and the terminal device include hardware structures and / or software modules corresponding to the execution of each function. It should be easily appreciated by those skilled in the art that, in combination with the units and method steps of each example described in the embodiments disclosed in this application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.

[0258] Fig. 9 and Fig.10 The following is a schematic diagram of the structure of possible communication devices provided in the embodiments of the present application. These communication devices can be used to implement the functions of the terminal device or network device in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments. In the embodiments of the present application, the communication device can be as follows: Figure 2 The terminal device 203 shown in FIG. 1 may also be Figure 2 The network device 201 and the network device 202 shown may also be modules (such as chips) applied to terminal devices or network devices.

[0259] like Fig. 9 As shown, the communication device 900 includes a processing unit 910 and a transceiver unit 920. The communication device 900 is used to implement the above Figure 4 The functions of the terminal device or the network device in the method embodiment are shown.

[0260] When the communication device 900 is used to implement Figure 4 The functions of the terminal device in the method embodiment shown are:

[0261] The transceiver unit 920 is configured to receive first information, where the first information comes from a first network device, and the first information is used to indicate a first physical downlink shared channel PDSCH rate matching and a first time offset;

[0262] A processing unit 910 is configured to determine second information according to the first information, where the second information is used to indicate a second PDSCH rate matching and a second time offset, where the second PDSCH rate matching is determined according to the first PDSCH rate matching, and the second time offset is determined according to the first time offset, wherein the first time offset is an offset between a time unit where the first information is located and a time unit where the first PDSCH rate matching is located, and the second time offset is an offset between a time unit where the second information is located and a time unit where the second PDSCH rate matching is located;

[0263] The transceiver unit 920 is further configured to send second information to the second network device.

[0264] When the communication device 900 is used to implement Figure 4 The functions of the network device (eg, the second network device) in the method embodiment shown are:

[0265] The transceiver unit 920 is used to receive second information from the terminal device, where the second information is determined according to the first information, the first information comes from the first network device, the first information is used to indicate the first physical downlink shared channel PDSCH rate matching and the first time offset, the second information is used to indicate the second PDSCH rate matching and the second time offset, the second PDSCH rate matching is determined according to the first PDSCH rate matching, and the second time offset is determined according to the first time offset;

[0266] A processing unit 910 is configured to determine a downlink time-frequency resource using the second information;

[0267] The transceiver unit 920 is further configured to send a PDSCH to the terminal device through the downlink time-frequency resource.

[0268] Among them, the first time offset is the offset between the time unit where the first information is located and the time unit where the first PDSCH rate matching is located, and the second time offset is the offset between the time unit where the second information is located and the time unit where the second PDSCH rate matching is located.

[0269] like Fig.10As shown, the communication device 1010 includes a processor 1010 and an interface circuit 1020. The processor 1010 and the interface circuit 1020 are coupled to each other. It is understood that the interface circuit 1020 can be a transceiver or an input-output interface. Optionally, the communication device 1010 may also include a memory 1030 for storing instructions executed by the processor 1010 or storing input data required by the processor 1010 to execute instructions or storing data generated after the processor 1010 executes instructions.

[0270] When the communication device 1010 is used to implement Figure 4 When the method is shown, the processor 1010 is used to implement the functions of the processing unit 910, and the interface circuit 1020 is used to implement the functions of the transceiver unit 920.

[0271] When the above communication device is a chip applied to a terminal, the terminal chip implements the functions of the terminal in the above method embodiment. The terminal chip receives information from other modules in the terminal (such as a radio frequency module or an antenna), and the information is sent by the base station to the terminal; or the terminal chip sends information to other modules in the terminal (such as a radio frequency module or an antenna), and the information is sent by the terminal to the base station.

[0272] When the above-mentioned communication device is a module applied to a base station, the base station module implements the functions of the base station in the above-mentioned method embodiment. The base station module receives information from other modules in the base station (such as a radio frequency module or an antenna), and the information is sent by the terminal to the base station; or, the base station module sends information to other modules in the base station (such as a radio frequency module or an antenna), and the information is sent by the base station to the terminal. The base station module here can be a baseband chip of a base station, or it can be a DU or other module, and the DU here can be a DU under an open radio access network (O-RAN) architecture.

[0273] It is understandable that the processor in the embodiments of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0274] According to the method provided in the embodiment of the present application, the present application also provides a computer program product, which includes: computer program code, when the computer program code runs on a computer, the computer executes the method of the terminal device in the aforementioned method embodiment.

[0275] According to the method provided in the embodiment of the present application, the present application also provides a computer program product, which includes: computer program code, when the computer program code is run on a computer, the computer executes the method of the first network device in the aforementioned method embodiment.

[0276] According to the method provided in the embodiment of the present application, the present application also provides a computer program product, which includes: computer program code, when the computer program code is run on a computer, the computer executes the method of the second network device in the aforementioned method embodiment.

[0277] According to the method provided in the embodiment of the present application, the present application also provides a computer-readable medium, which stores a program code. When the program code runs on a computer, the computer executes the method of the terminal device in the aforementioned method embodiment.

[0278] According to the method provided in the embodiment of the present application, the present application also provides a computer-readable medium, which stores a program code. When the program code runs on a computer, the computer executes the method of the first network device in the aforementioned method embodiment.

[0279] According to the method provided in the embodiment of the present application, the present application also provides a computer-readable medium, which stores a program code. When the program code runs on a computer, the computer executes the method of the second network device in the aforementioned method embodiment.

[0280] An embodiment of the present application also provides a processing device, including a processor and an interface; the processor is used to execute the method for data scheduling of collaborative transmission in any of the above method embodiments.

[0281] An embodiment of the present application also provides a system for collaborative transmission data scheduling, which includes the first network device, the second network device and a terminal device in the above embodiment.

[0282] The terms "component", "module", "system", etc. used in this specification are used to represent computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program and / or a computer. By way of illustration, both applications running on a computing device and a computing device can be components. One or more components may reside in a process and / or an execution thread, and a component may be located on a computer and / or distributed between two or more computers. In addition, these components may be executed from various computer-readable media having various data structures stored thereon. Components may, for example, communicate through local and / or remote processes according to signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system and / or a network, such as the Internet interacting with other systems through signals).

[0283] Those of ordinary skill in the art will appreciate that the various illustrative logical blocks and steps described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or in 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 may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0284] 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.

[0285] 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.

[0286] It should be understood that "at least one" in the embodiments of the present application refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b and c can represent: a, or, b, or, c, or, a and b, or, a and c, or, b and c, or, a, b and c. Where a, b and c can be single or multiple, respectively.

[0287] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0288] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0289] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0290] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks or optical disks.

[0291] 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 resource indication method for collaborative transmission, characterized in that: include: The terminal device receives first information, where the first information comes from a first network device, and the first information is used to indicate a first physical downlink shared channel PDSCH rate matching and a first time offset; The terminal device sends second information to the second network device according to the first information, where the second information is used to indicate a second PDSCH rate matching and a second time offset, where the second PDSCH rate matching is determined according to the first PDSCH rate matching, and the second time offset is determined according to the first time offset; Among them, the first time offset is the offset between the time unit where the first information is received and the time unit where the first PDSCH rate is matched, and the second time offset is the offset between the time unit where the second information is received and the time unit where the second PDSCH rate is matched.

2. The method according to claim 1, characterized in that The method further comprises: The terminal device receives at least one third information, and the at least one third information comes from at least one second network device. One third information among the at least one third information is used to indicate a third PDSCH rate match of at least one third PDSCH rate match and a third time offset of at least one third time offset, wherein one third information, one third PDSCH rate match and one third time offset correspond one to one, and the third time offset is the offset between the time unit where the third information is received and the time unit where the third PDSCH rate match is located.

3. The method according to claim 2, characterized in that The terminal device sends the second information to the at least one second network device and the first network device based on the first information and the at least one third information, the second information is determined based on the first information and the at least one third information, the second PDSCH rate matching is determined based on the first PDSCH rate matching and the at least one third PDSCH rate matching, and the second time offset is determined based on the first time offset and the at least one third time offset.

4. The method according to any one of claims 1 to 3, characterized in that The first information includes a first index, where the first index is used to indicate a corresponding relationship between the first PDSCH rate matching and the first time offset.

5. The method according to any one of claims 1 to 3, characterized in that The first information includes a first field, and the first field is used to indicate the first PDSCH rate matching and the first time offset.

6. The method according to any one of claims 1 to 4, characterized in that The second information includes a second index, where the second index is used to indicate a correspondence between the second PDSCH rate matching and the second time offset.

7. The method according to any one of claims 1 to 3, 5, characterized in that: The second information includes a second field, and the second field is used to indicate the second PDSCH rate matching and the second time offset.

8. The method according to any one of claims 2 to 4 and 6, characterized in that: The third information includes a third index, and the third index is used to indicate a corresponding relationship between the third PDSCH rate matching and the third time offset.

9. The method according to any one of claims 2 to 3, 5 and 7, characterized in that: The third information includes a third field, and the third field is used to indicate the third PDSCH rate matching and the third time offset.

10. The method according to any one of claims 1 to 9, characterized in that The second time offset includes at least one time offset.

11. The method according to any one of claims 1 to 10, characterized in that In the case where the first information is included in the first downlink control information DCI, the first DCI comes from the first network device, and the first DCI includes a first PDSCH rate matching indication field and a fourth field, the first PDSCH rate matching indication field is used to indicate the first PDSCH rate matching, and the fourth field is used to indicate the first time offset.

12. The method according to any one of claims 2 to 11, characterized in that In the case where the third information is included in the second downlink control information DCI, the second DCI comes from the second network device, and the second DCI includes a second PDSCH rate matching indication field and a fifth field, the second PDSCH rate matching indication field is used to indicate the third PDSCH rate matching, and the fifth field is used to indicate the third time offset.

13. A resource indication method for collaborative transmission, characterized in that: include: The second network device receives second information sent by the terminal device, where the second information is determined according to the first information, the first information comes from the first network device, the first information is used to indicate a first physical downlink shared channel PDSCH rate matching and a first offset, the second information is used to indicate a second PDSCH rate matching and a second offset, the second PDSCH rate matching is determined according to the first PDSCH rate matching, and the second time offset is determined according to the first time offset; The second network device sends a PDSCH to the terminal device according to the second information, Among them, the first time offset is the offset between the time unit where the first information is sent and the time unit where the first PDSCH rate matches, and the second time offset is the offset between the time unit where the second information is sent and the time unit where the second PDSCH rate matches.

14. The method according to claim 13, characterized in that Before the second network device receives the second information sent by the terminal device, the method further includes: The second network device sends third information to the terminal device, where the third information is used to indicate a third PDSCH rate match and a third time offset, where the third time offset is an offset between a time unit where the third information is received and a time unit where the third PDSCH rate match is received.

15. The method according to claim 14, characterized in that The second information is determined according to the first information and at least one third information, the at least one third information comes from at least one second network device, and the at least one third information is used to indicate at least one third PDSCH rate matching and at least one third time offset, The second PDSCH rate matching is determined according to the first PDSCH rate matching, and the second time offset is determined according to the first time offset, including: The second PDSCH rate matching is determined according to the first PDSCH rate matching and at least one of the third PDSCH rate matching, and the second time offset is determined according to the first time offset and at least one of the third time offset.

16. The method according to any one of claims 13 to 15, characterized in that The first information includes a first index, where the first index is used to indicate a correspondence between the first PDSCH rate matching resource and the first time offset.

17. The method according to any one of claims 13 to 15, characterized in that The first information includes a first field, and the first field is used to indicate the first PDSCH rate matching and the first time offset.

18. The method according to any one of claims 13 to 16, characterized in that The second information includes a second index, where the second index is used to indicate a correspondence between the second PDSCH rate matching and the second time offset.

19. The method according to any one of claims 13 to 15, 17, characterized in that: The second information includes a second field, and the second field is used to indicate the second PDSCH rate matching and the second time offset.

20. The method according to any one of claims 14 to 16, 18, characterized in that The third information includes a third index, and the third index is used to indicate a corresponding relationship between the third PDSCH rate matching and the third time offset.

21. The method according to any one of claims 14 to 15, 17, 19, characterized in that: The third information includes a third field, and the third field is used to indicate the third PDSCH rate matching and the third time offset.

22. The method according to any one of claims 13 to 21, characterized in that The second time offset includes at least one time offset.

23. The method according to any one of claims 13 to 22, characterized in that In the case where the first information is included in the first downlink control information DCI, the first DCI comes from the first network device, and the first DCI includes a first PDSCH rate matching indication field and a fourth field, the first PDSCH rate matching indication field is used to indicate the first PDSCH rate matching, and the fourth field is used to indicate the first time offset.

24. The method according to any one of claims 14 to 23, characterized in that In the case where the third information is included in the second downlink control information DCI, the second DCI comes from the second network device, and the second DCI includes a second PDSCH rate matching indication field and a fifth field, the second PDSCH rate matching indication field is used to indicate the third PDSCH rate matching, and the fifth field is used to indicate the third time offset.

25. A communication device, characterized in that: include: A processor, configured to execute a computer program stored in a memory, so that the communication device executes the method according to any one of claims 1 to 12, or executes the method according to any one of claims 13 to 24.

26. A computer-readable storage medium, characterized in that: A computer program or instruction is stored thereon, characterized in that when the computer program or instruction is executed by a processor, the method as claimed in any one of claims 1 to 12 is executed, or the method as claimed in any one of claims 13 to 24 is executed.

27. A computer program product comprising instructions, which, when executed on a computer, causes the method as claimed in any one of claims 1 to 12 to be performed, or causes the method as claimed in any one of claims 13 to 24 to be performed.

28. A chip system, characterized in that: It comprises: a processor, which is used to call and run a computer program or instruction from a memory, so that a communication device equipped with the chip system implements the method as described in any one of claims 1 to 12, or implements the method as described in any one of claims 13 to 24.

Images