CN111757351B

CN111757351B - Data receiving and transmitting method and device

Info

Publication number: CN111757351B
Application number: CN201910253505.1A
Authority: CN
Inventors: 施弘哲; 纪刘榴; 杭海存; 吕永霞; 吴茜; 毕晓艳
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2022-04-29
Anticipated expiration: 2039-03-29
Also published as: CN111757351A; WO2020199853A1

Abstract

The application provides a data receiving and sending method and a device, in the method, a terminal receives a first PDSCH and a second PDSCH, the sending time of the first PDSCH is earlier than that of the second PDSCH, and the spatial information related to the first PDSCH and the second PDSCH are different; in case that an actual time interval between the first PDSCH and the second PDSCH is less than a predefined time interval, the terminal receives the second PDSCH if and only if a preset condition is satisfied. The preset conditions include one or more of the following conditions: the ratio of the predefined time interval to the symbol length of the second PDSCH is less than or equal to a first preset threshold; the ratio of the difference between the predefined time interval and the actual time interval to the symbol length of the second PDSCH is less than or equal to a second preset threshold; the code rate of the second PDSCH is less than or equal to a third preset threshold. The present application relates to the field of communications.

Description

Data receiving and transmitting method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for receiving and sending data.

Background

In modern communication systems, in order to improve the spectrum utilization, multiple cells in a network may be deployed in the same frequency band. In this case, when the terminal is at the edge of the cell, the communication of the terminal may be interfered by a signal transmitted from a neighboring cell of the serving cell. In order to solve the problem, the interference can be effectively avoided through a multipoint transmission technology, and the user rate is improved. The multipoint refers to a plurality of Transmission Reception Points (TRPs), and the plurality of TRPs may cooperate with each other through mutual information, so as to avoid interference. In a multi-point transmission scenario, in order to increase reliability of data transmission of a terminal, a plurality of TRPs may respectively transmit data to the terminal. But in some scenarios the reception efficiency of the terminal is not high.

Disclosure of Invention

The embodiment of the application provides a data receiving and sending method and device, which are used for improving the receiving efficiency of a terminal.

In order to achieve the above purpose, the embodiments of the present application provide the following technical solutions:

in a first aspect, a data receiving method is provided, including: a terminal receives a first PDSCH and a second PDSCH, wherein the transmission time of the first PDSCH is earlier than that of the second PDSCH, and the spatial information associated with the first PDSCH is different from that associated with the second PDSCH; under the condition that the actual time interval between the first PDSCH and the second PDSCH is smaller than a predefined time interval, the terminal receives the second PDSCH if and only if a preset condition is met, wherein the actual time interval refers to the time interval between an end symbol in symbols occupied by the first PDSCH and a start symbol in symbols occupied by the second PDSCH; the preset conditions include one or more of the following conditions: a ratio of the predefined time interval to a symbol length of the second PDSCH is less than or equal to a first preset threshold; a ratio of a difference between the predefined time interval and the actual time interval to a symbol length of the second PDSCH is less than or equal to a second preset threshold; the code rate of the second PDSCH is less than or equal to a third preset threshold.

The first aspect provides a method, which predefines a time interval on the terminal side, and the terminal may determine whether to receive the second PDSCH according to the predefined time interval. Due to the influence of the AGC response time, under the condition that the preset condition is not satisfied, the terminal is likely to be unable to decode the second PDSCH, and the terminal skips the reception of the second PDSCH, thereby improving the reception efficiency of the terminal. Therefore, the influence of AGC response time on data reception of the terminal is reduced to the maximum extent, and the overall receiving efficiency and performance of the terminal are improved.

In one possible implementation, the first PDSCH and the second PDSCH are scheduled by the same DCI; or, the first PDSCH and the second PDSCH are scheduled through different DCI.

In one possible implementation, the predefined time interval is X microseconds, X being greater than 0; alternatively, the predefined time interval is Y symbols, Y being an integer greater than 0.

In one possible implementation, the predefined time interval corresponds to a subcarrier interval.

In one possible implementation, the first PDSCH and the second PDSCH correspond to the same information bits.

In one possible implementation, the mapping type of one PDSCH of the first PDSCH and the second PDSCH is type a or type B, and the mapping type of the other PDSCH is type B.

In a possible implementation, the symbols occupied by the first PDSCH and the second PDSCH are located in the same time slot.

In a second aspect, a data transmission method is provided, including: and the second TRP sends a second PDSCH, the sending time of the second PDSCH is later than that of the first PDSCH, the time interval between the starting symbol in the symbols occupied by the second PDSCH and the ending symbol in the symbols occupied by the first PDSCH is greater than or equal to a predefined time interval, and the spatial information associated with the first PDSCH is different from that associated with the second PDSCH.

The second aspect provides the method, because the first PDSCH and the second PDSCH are associated with different spatial information. Therefore, there may be a large signal reception power difference when the terminal receives the first PDSCH and the second PDSCH. If the starting symbol of the symbols occupied by the second PDSCH is adjacent to the ending symbol of the symbols occupied by the first PDSCH, the AGC circuit may not be able to perform power adjustment in time, thereby causing signal distortion. Embodiment two provides a method wherein there is a predefined time interval between the starting symbol of the time domain resources occupied by the second PDSCH and the ending symbol of the time domain resources occupied by the first PDSCH. The predefined time interval is reasonably configured, so that the predefined time interval meets the response time of the AGC circuit, the AGC circuit is ensured to timely adjust the power, signal distortion is avoided, and the receiving efficiency of the terminal is improved.

In a third aspect, a data receiving apparatus is provided, including: a communication unit and a processing unit; the processing unit is configured to receive a first PDSCH and a second PDSCH through the communication unit, where a transmission time of the first PDSCH is earlier than a transmission time of the second PDSCH, and spatial information associated with the first PDSCH and the second PDSCH are different; the processing unit is further configured to receive the second PDSCH through the communication unit if and only if a preset condition is met under the condition that an actual time interval between the first PDSCH and the second PDSCH is smaller than a predefined time interval, where the actual time interval is a time interval between an end symbol in symbols occupied by the first PDSCH and a start symbol in symbols occupied by the second PDSCH; the preset conditions include one or more of the following conditions: a ratio of the predefined time interval to a symbol length of the second PDSCH is less than or equal to a first preset threshold; a ratio of a difference between the predefined time interval and the actual time interval to a symbol length of the second PDSCH is less than or equal to a second preset threshold; the code rate of the second PDSCH is less than or equal to a third preset threshold.

In a fourth aspect, there is provided a data transmission apparatus comprising: a communication unit and a processing unit; the processing unit sends the second PDSCH through the communication unit, the sending time of the second PDSCH is later than that of the first PDSCH, the time interval between the starting symbol in the symbols occupied by the second PDSCH and the ending symbol in the symbols occupied by the first PDSCH is larger than or equal to the predefined time interval, and the spatial information associated with the first PDSCH is different from that associated with the second PDSCH.

In a fifth aspect, a communication method is provided, including: a terminal receives a user capacity query request message, wherein the user capacity query request message is used for requesting the capacity information of the terminal; the terminal sends a user capability query response message to the network equipment, wherein the user capability query response message comprises the capability information of the terminal, and the capability information of the terminal comprises information used for indicating AGC response time or a predefined time interval of the terminal.

In a sixth aspect, a communication method is provided, including: the network equipment sends a user capacity query request message to a terminal, wherein the user capacity query request message is used for requesting the capacity information of the terminal; the network equipment receives a user capability query response message from the terminal, wherein the user capability query response message comprises capability information of the terminal, and the capability information of the terminal comprises information used for indicating AGC response time or a predefined time interval of the terminal.

In a seventh aspect, a communication apparatus is provided, including: a communication unit and a processing unit; the processing unit is configured to receive a user capability query request message through the communication unit, where the user capability query request message is used to request capability information of the terminal; the processing unit is further configured to send a user capability query response message to the network device through the communication unit, where the user capability query response message includes capability information of the terminal, and the capability information of the terminal includes information used to indicate AGC response time or a predefined time interval of the terminal.

In an eighth aspect, a communications apparatus, comprising: a communication unit and a processing unit; the processing unit is used for sending a user capability query request message to a terminal through the communication unit, wherein the user capability query request message is used for requesting capability information of the terminal; the processing unit is further configured to receive a user capability query response message from the terminal through the communication unit, where the user capability query response message includes capability information of the terminal, and the capability information of the terminal includes information indicating an AGC response time or a predefined time interval of the terminal.

In a ninth aspect, there is provided a data receiving apparatus comprising: a processor. The processor is connected with the memory, the memory is used for storing computer execution instructions, and the processor executes the computer execution instructions stored by the memory, so as to realize any one of the methods provided by the first aspect. The memory and the processor may be integrated together or may be separate devices. If the latter is the case, the memory may be located inside the data receiving device or outside the data receiving device.

In one possible implementation, the processor includes logic circuitry and further includes at least one of an input interface and an output interface. Wherein the output interface is used for executing the sent action in the corresponding method, and the input interface is used for executing the received action in the corresponding method.

In one possible implementation, the data receiving device further includes a communication interface and a communication bus, and the processor, the memory and the communication interface are connected through the communication bus. The communication interface is used for executing the actions of transceiving in the corresponding method. The communication interface may also be referred to as a transceiver. Optionally, the communication interface comprises at least one of a transmitter and a receiver, in which case the transmitter is configured to perform the act of transmitting in the respective method and the receiver is configured to perform the act of receiving in the respective method.

In one possible implementation, the data receiving means is in the form of a chip.

A tenth aspect provides a data transmission apparatus comprising: a processor. The processor is connected with the memory, the memory is used for storing computer execution instructions, and the processor executes the computer execution instructions stored by the memory, so as to realize any one of the methods provided by the second aspect. The memory and the processor may be integrated together or may be separate devices. In the latter case, the memory may be located inside the data transmission device or outside the data transmission device.

In one possible implementation, the data sending device further includes a communication interface and a communication bus, and the processor, the memory and the communication interface are connected through the communication bus. The communication interface is used for executing the actions of transceiving in the corresponding method. The communication interface may also be referred to as a transceiver. Optionally, the communication interface comprises at least one of a transmitter and a receiver, in which case the transmitter is configured to perform the act of transmitting in the respective method and the receiver is configured to perform the act of receiving in the respective method.

In one possible implementation, the data transmission means are in the form of a chip.

In an eleventh aspect, there is provided a communication apparatus comprising: a processor. The processor is connected with the memory, the memory is used for storing computer execution instructions, and the processor executes the computer execution instructions stored in the memory, so as to realize the method provided by the fifth aspect or the sixth aspect. The memory and the processor may be integrated together or may be separate devices. If the latter, the memory may be located within the communication device or may be located outside the communication device.

In one possible implementation, the communication device further includes a communication interface and a communication bus, and the processor, the memory, and the communication interface are connected by the communication bus. The communication interface is used for executing the actions of transceiving in the corresponding method. The communication interface may also be referred to as a transceiver. Optionally, the communication interface comprises at least one of a transmitter and a receiver, in which case the transmitter is configured to perform the act of transmitting in the respective method and the receiver is configured to perform the act of receiving in the respective method.

In one possible implementation, the communication device is in the form of a product of chips.

In a twelfth aspect, there is provided a communication system comprising: the data receiving apparatus provided in the third aspect and the data transmitting apparatus provided in the fourth aspect.

In a thirteenth aspect, there is provided a computer-readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform any one of the methods provided by the first or second or fifth or sixth aspects.

In a fourteenth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform any one of the methods provided in the first or second or fifth or sixth aspects.

For technical effects brought by any one implementation manner of the third aspect, the fourth aspect, the seventh aspect, the eighth aspect to the fourteenth aspect, reference may be made to technical effects brought by corresponding implementation manners in the first aspect, the second aspect, the fifth aspect, or the sixth aspect, and no further description is given here.

It should be noted that, all possible implementation manners of any one of the above aspects may be combined without departing from the scope of the claims.

Drawings

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

FIG. 2 is a schematic diagram of an AGC circuit according to an embodiment of the present application;

fig. 3 is a schematic view of a scenario of coordinated multipoint transmission according to an embodiment of the present application;

fig. 4 is a schematic diagram of a TRP provided in an embodiment of the present application communicating with a terminal;

fig. 5 and fig. 6 are schematic diagrams of time domain resources occupied by data according to an embodiment of the present application;

fig. 7 is a flowchart of a data receiving method according to an embodiment of the present application;

fig. 8 and fig. 9 are schematic diagrams of time domain resources occupied by data according to an embodiment of the present application;

fig. 10 and fig. 11 are flowcharts of a method for transmitting and receiving data according to an embodiment of the present application, respectively;

fig. 12 and fig. 13 are schematic diagrams of time domain resources occupied by data according to an embodiment of the present application;

fig. 14 is a flowchart of a data transmitting and receiving method according to an embodiment of the present application;

fig. 15 is a schematic diagram illustrating a communication device according to an embodiment of the present application;

fig. 16 and fig. 17 are schematic hardware structures of a communication apparatus according to an embodiment of the present application;

fig. 18 is a schematic hardware structure diagram of a terminal according to an embodiment of the present disclosure;

fig. 19 is a schematic hardware structure diagram of a network device according to an embodiment of the present application.

Detailed Description

In the description of this application, "/" means "or" unless otherwise stated, for example, A/B may mean A or B. "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. Further, "at least one" means one or more, "a plurality" means two or more. The terms "first", "second", and the like do not necessarily limit the number and execution order, and the terms "first", "second", and the like do not necessarily limit the difference.

It is noted that, in the present application, words such as "exemplary" or "for example" are used to mean exemplary, illustrative, or descriptive. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The technical scheme of the embodiment of the application can be applied to various communication systems. For example: orthogonal frequency-division multiple access (OFDMA), single carrier frequency-division multiple access (SC-FDMA), and other systems. The term "system" may be used interchangeably with "network". The OFDMA system may implement wireless technologies such as evolved universal radio access (E-UTRA), Ultra Mobile Broadband (UMB), and the like. E-UTRA is an evolved version of the Universal Mobile Telecommunications System (UMTS). The third generation partnership project (3rd generation partnership project, 3GPP) is using a new version of E-UTRA in Long Term Evolution (LTE) and various versions based on LTE evolution. The fifth generation (5th-generation, abbreviated as 5G) communication system and the New Radio (NR) are the next generation communication systems under study. The 5G communication system includes a non-independent Networking (NSA) 5G communication system, an independent networking (SA) 5G communication system, or an NSA 5G communication system and an SA 5G communication system. In addition, the communication system can also be applied to future-oriented communication technologies, and the technical solutions provided by the embodiments of the present application are all applied. The above-described communication system to which the present application is applied is merely an example, and the communication system to which the present application is applied is not limited thereto.

The technical scheme provided by the embodiment of the application can be applied to various communication scenes. For example, the scenarios include machine to machine (M2M), macro and micro communication, enhanced mobile broadband (eMBB), ultra-reliable and ultra-low latency communication (URLLC), and massive internet of things communication (mtc).

The communication system to which the technical scheme provided by the application is applied can comprise at least one TRP and at least one terminal. One or more of the at least one terminal may communicate with one or more of the at least one TRP. In the first case, referring to fig. 1, one terminal may communicate with multiple TRPs (e.g., TRP1 and TRP2), that is, multiple TRPs may each transmit signaling and downlink data to the terminal, and conversely, the terminal may also transmit uplink data to multiple TRPs. In this case, when the terminal is in a cooperative transmission state of multiple TRPs, ideal backhaul (i.e., there is substantially no transmission delay between the TRPs) can be performed between the TRPs. In the second case, one TRP may communicate with one terminal using different beams, for example, one TRP may transmit downlink data to the terminal using different beams in different time domain resources.

The TRP is an entity for transmitting a signal, receiving a signal, or both at the network side. The TRP may be a device deployed in a Radio Access Network (RAN) to provide a terminal with a wireless communication function. Illustratively, the TRP may be: a base station, an antenna panel on the base station, various forms of control nodes, a TRP in a public land mobile network (PLMN for short) for future evolution, and the like.

The base station may be a macro base station, a micro base station (also referred to as a small station), a relay station, an access point (AP for short), or the like in various forms. In systems using different radio access technologies, the names of devices that function as base stations may differ. For example, a global system for mobile communication (GSM) or Code Division Multiple Access (CDMA) network may be referred to as a Base Transceiver Station (BTS), a Wideband Code Division Multiple Access (WCDMA) network may be referred to as a base station (NodeB), an LTE system may be referred to as an evolved node b (eNB or eNodeB), a 5G communication system or an NR communication system may be referred to as a next generation base station (gNB), and the present application does not limit specific names of the base stations.

The control node may be connected to a plurality of base stations and configure resources for a plurality of terminals under the coverage of the plurality of base stations. The control node may include a network controller, a wireless controller in a Cloud Radio Access Network (CRAN) scenario, and the like.

A terminal is an entity on the user side for receiving signals, or transmitting signals, or both. The terminal is used to provide one or more of voice services and data connectivity services to the user. A terminal may also be referred to as a User Equipment (UE), a terminal equipment, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal may be a Mobile Station (MS), a subscriber unit (subscriber unit), an unmanned aerial vehicle (drone), an internet of things (IoT) device, a Station (ST) in a Wireless Local Area Network (WLAN), a cellular phone (cellular phone), a smart phone (smart phone), a cordless phone, a wireless data card, a tablet computer, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a laptop computer (laptop computer), a Machine Type Communication (MTC) terminal, a handheld device with a wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device (may also be referred to as a wearable smart device). The terminal may also be a terminal in a next generation communication system, e.g. a terminal in a 5G communication system or a terminal in a PLMN for future evolution, a terminal in an NR communication system, etc.

The network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not constitute a limitation on the technical solution provided in the embodiment of the present application. As can be known to those skilled in the art, with the evolution of network architecture and the emergence of new service scenarios, the technical solution provided in the embodiments of the present application is also applicable to similar technical problems.

In order to make the embodiments of the present application clearer, concepts and parts related to the embodiments of the present application will be briefly described below.

1. Automatic Gain Control (AGC) circuit

An AGC circuit is an important circuit in a radio receiving apparatus (e.g., a terminal), and referring to fig. 2, the circuit can adjust an input signal having a large amplitude variation to a signal having an amplitude variation within a small range, and then input the signal to a radio frequency device of the radio receiving apparatus. Since the radio frequency device of the radio receiving apparatus has an optimum received signal strength interval at the beginning of design, the input signal received by the radio frequency device in this interval is not distorted. However, in an actual communication process, due to various reasons, the received signal of the rf device may exceed the optimal received signal strength interval, and therefore, the strength of the input signal needs to be scaled to the optimal received signal strength interval by the AGC circuit at the front end of the rf device.

The AGC circuit limits the amplitude variation of the output signal by controlling the gain of a controllable gain amplifier, which in turn depends on the variation of the input signal strength. Thus, when the strength of the input signal changes from one value to another, the AGC circuit needs to change the gain of the controllable gain amplifier from one value to another value. And it takes a certain time for the gain of the controllable gain amplifier to change from one value to another value, which may be referred to as the response time of the AGC circuit. If the response time is too short, the strength of the output signal of the AGC circuit is liable to fluctuate with the instantaneous fluctuation of the input signal, resulting in distortion of the output signal, and if the response time is too long, the adjustment delay of the AGC circuit may affect the reception efficiency of the communication system. Therefore, the response time needs to be set to meet the actual requirements of the communication system. For example, if the amplitudes of the two input signals differ by 6dB, the response time of the AGC is about 10 microseconds (us).

2. Beam (beam)

One of the main problems of high frequency communication is that signal energy drops sharply with transmission distance, resulting in short signal transmission distance. In order to overcome the problem, the high-frequency communication adopts an analog beam technology, the weighting processing is carried out through a large-scale antenna array, the signal energy is concentrated in a smaller range, and a signal (called an analog beam, called a beam for short) similar to a light beam is formed, so that the transmission distance is increased.

A beam is a communication resource. The beam may be a wide beam, or a narrow beam, or other type of beam. The technique of forming the beam may be a beamforming technique or other technical means. The beamforming technique may be embodied as a digital beamforming technique, an analog beamforming technique, a hybrid beamforming technique. Different beams may be considered different resources. The same information or different information may be transmitted through different beams. Alternatively, a plurality of beams having the same or similar communication characteristics may be regarded as one beam.

The beams include a transmit beam and a receive beam. The transmit beam may refer to the distribution of signal strength formed in different spatial directions after the signal is transmitted by the antenna, and the receive beam may refer to the distribution of the antenna array to reinforce or weaken the reception of the wireless signal in different spatial directions.

3. Spatial information (quasi co-location information)

The spatial information may be indicated by a quasi co-location (QCL) relationship of antenna ports. Specifically, it may be indicated in indication information (e.g., Downlink Control Information (DCI)), that one reference signal resource (or antenna port) has a QCL relationship with another reference signal resource (or antenna port), to indicate that the two reference signal resources (or antenna ports) have the QCL relationship.

The signals corresponding to the antenna ports having the QCL relationship have the same parameters, or the parameters of one antenna port may be used to determine the parameters of another antenna port having the QCL relationship with the antenna port, or two antenna ports have the same parameters, or the parameter difference between the two antenna ports is smaller than a certain threshold. Wherein the parameters may include one or more of: delay spread (delay spread), Doppler spread (Doppler spread), Doppler shift (Doppler shift), average delay (average delay), average gain, spatial Rx parameters. Wherein the spatial reception parameters may include one or more of: angle of arrival (AOA), average AOA, AOA extension, angle of departure (AOD), average angle of departure (AOD), AOD extension, receive antenna spatial correlation parameter, transmit beam, receive beam, and resource identification.

The angle may be a decomposition value of different dimensions, or a combination of decomposition values of different dimensions. The antenna ports are antenna ports with different antenna port numbers, and/or antenna ports with the same antenna port number for transmitting or receiving information in different time and/or frequency and/or code domain resources, and/or antenna ports with different antenna port numbers for transmitting or receiving information in different time and/or frequency and/or code domain resources. The resource identification may include: a channel state information reference signal (CSI-RS) resource identifier, or a Sounding Reference Signal (SRS) resource identifier, or a synchronization signal broadcast channel block (synchronization/physical broadcast channel block, which may be abbreviated as SS/PBCH block, or abbreviated as SSB) resource identifier, or a resource identifier of a preamble sequence transmitted on a Physical Random Access Channel (PRACH), or a resource identifier of a demodulation reference signal (DMRS), which is used to indicate a beam on a resource.

In the NR protocol, QCL relationships can be classified into the following four types based on different parameters:

type a (type a): doppler frequency shift, Doppler spread, average time delay and time delay spread;

type b (type b): doppler shift, doppler spread;

type c (type c): doppler shift, average delay; type d (type d): the space receives the parameters.

Wherein QCLs of type D are used to indicate different beams, i.e. QCLs defined based on spatial reception parameters. The beams have the same spatial characteristics and can be received using the same receive beam. The beam may be specifically represented in the protocol by identification of various signals, such as a resource index of CSI-RS, an index of SSB, a resource index of SRS, and a resource index of Tracking Reference Signal (TRS).

4. Multi-point transmission technique

The multi-point transmission technology is a technology for carrying out data transmission by a plurality of TRPs. In the multipoint transmission technology, a plurality of TRPs may cooperate to transmit downlink signals to a user and/or cooperate to receive uplink signals of the user.

The multipoint transmission technology is mainly divided into Joint Transmission (JT), Dynamic Point Selection (DPS), Dynamic Cell Selection (DCS), coordinated beam forming (CB), Coordinated Scheduling (CS), and the like.

The multipoint transmission related to the present application is mainly a joint transmission (or referred to as coordinated multipoint transmission) scenario, and the transmission rate of the terminal located at the cell edge can be increased through the joint transmission of a plurality of TRPs. For example, in a non-joint transmission scenario, referring to fig. 3 (a), when a terminal is located at an edge of a cell, communication of the terminal may be interfered by a signal transmitted by a neighboring cell of a serving cell. The solid lines in fig. 3 represent useful data generated for the terminal, and the dotted lines represent interference generated for the terminal. In the joint transmission scenario, referring to (b) in fig. 3, a plurality of TRPs are joined to send data to one terminal, and the terminal receives a plurality of useful data, so that a signal sent by a neighboring cell of a serving cell does not interfere with the terminal, but can improve the transmission rate of the terminal located at the edge of the cell.

It should be noted that different TRPs correspond to different spatial information.

5. Multi-DCI based Multi-Point Transmission (Multi-DCI based Multi-TRP Transmission)

In a joint transmission scenario, multiple TRPs may transmit respective physical downlink control channels (PDCCHs for short) including DCI to the same terminal, and each PDCCH schedules a corresponding physical downlink shared channel (PDSCH for short). In this case, multiple TRPs may schedule data relatively independently with limited interaction, and such transmission may be referred to as multi-DCI based multipoint transmission.

6. Coordinated multipoint repeat transmission

In 5G and future evolution communication technologies, URLLC is one of the important traffic types. In URLLC service, data throughput is often no longer the main measure, and in contrast, low error rate and low delay are the most critical measures. In the multipoint transmission technology, channel diversity exists among channels of a plurality of TRPs, if a repeated sending mode is adopted, the reliability of a communication link can be improved, and therefore the multipoint transmission technology can be used for enhancing the reliability of URLLC services.

In order to improve data transmission reliability, a plurality of TRPs may repeatedly transmit data to a terminal through different channels in a time division manner. Exemplarily, referring to fig. 4, the TRP1 and TRP2 may transmit data corresponding to the same information bit to the same terminal at t1 and t2, respectively. At this time, one terminal under the multipoint coordination may receive data corresponding to the same information bit transmitted from a plurality of TRPs in a time division manner. After receiving a plurality of data, the terminal can process the received data to obtain soft information, and then soft combining (soft combining) is performed on the soft information to improve the decoding success rate of the data.

7. Time slot

In NR, 1 slot contains 14 Orthogonal Frequency Division Multiplexing (OFDM) symbols (hereinafter, referred to as symbols) for a normal (normal) Cyclic Prefix (CP). For extended CP, 1 slot contains 12 symbols.

For convenience of description, in the embodiment of the present application, if not specifically stated, 1 slot includes 14 symbols. In the slot, 14 symbols are numbered in order from small to large, the smallest number is 0, and the largest number is 13. In the embodiment of the present application, the symbol with index (i.e., number) i is denoted as symbol # i, and one slot includes symbols #0 to # 13. In the present application, a time slot with an index (i.e., number) j will be referred to as a time slot # j hereinafter. j is an integer of 0 or more, and i is an integer of 0 or more and 13 or less.

8. PDSCH time domain resource allocation table

The PDSCH time domain resource allocation table is used for allocating the time domain resources for sending the PDSCH. The time domain resource allocation table of the PDSCH includes information of a start symbol (denoted as S) and a symbol length (denoted as L) of the time domain resources of the PDSCH allowed by the network. The values of S and L are related to the Mapping Type (Mapping Type) of the PDSCH and the CP Type, which can be specifically shown in table 1.

TABLE 1

Note: the mapping Type of the PDSCH includes Type (Type) a and Type B. The CP types include a normal CP and an extended CP. DMRS refers to demodulation reference signal (demodulation reference signal).

Taking the normal CP as an example, the S of the PDSCH may be symbol #0 to symbol #3 in one slot when the mapping type is type a, and may be symbol #0 to symbol #12 in one slot when the mapping type is type B. L of the PDSCH may be 3 to 14 symbols when the mapping type is type a, and may be 2, 4, 7 symbols when the type B.

In a time division transmission scheme of a multipoint transmission technique, one possible application scenario is as follows: the symbols occupied by the 2 PDSCHs for the 2 TRP calls are consecutive symbols, i.e., the end symbol (i.e., the last symbol) in the symbols occupied by the first PDSCH is adjacent to the start symbol (i.e., the first symbol) in the symbols occupied by the second PDSCH.

Illustratively, if the mapping types of 2 PDSCHs called in 2 TRP time division are all TypeB. As can be seen from table 1, when the mapping type is type b, the length of the PDSCH may be 2, 4, 7 symbols, which is much smaller than the number of symbols occupied by one slot. This scheduling method is most common in a mini-slot (small/micro slot) structure, i.e. only few symbols are scheduled at a time to complete the data transmission function of one slot.

Referring to fig. 5, if S is 2 and L is 4 in the time domain resource occupied by the 1 st PDSCH transmitted by TRP1, S is 6 and L is 4 in the time domain resource occupied by the 2 nd PDSCH transmitted by TRP 2. At this time, the last symbol of the 1 st PDSCH occupied symbols is adjacent to the 1 st symbol of the 2 nd PDSCH occupied symbols. In this case, if two PDSCHs have a large signal reception power difference, for example, they are from different TRPs, respectively, and a path difference exists between the terminal and the different TRPs, and for example, they are transmitted by beams with different widths, respectively, at this time, an AGC circuit of the terminal may not be able to timely adjust a controllable gain amplifier from a gain adapted to a previous PDSCH reception power to a gain adapted to a subsequent PDSCH reception power, that is, the power adjustment cannot be timely completed, which may cause signal distortion, thereby reducing the reception efficiency of the terminal.

Based on the requirements of high reliability and low delay of the current communication network, the TRP may purposefully and continuously schedule multiple PDSCHs with type b mapping types, and at this time, the multiple PDSCHs may correspond to the same information bit to enhance reliability and continuously transmit to reduce delay. In such a scenario, the above-mentioned signal distortion problem may occur frequently.

In addition, for PDSCH located in two consecutive slots, see (a) in fig. 6, since CP and PDCCH are spaced in the middle of the two consecutive slots. Therefore, the time length of the CP and the PDCCH in the time domain can generally meet the requirement of the response time of the AGC. However, since the 5G communication system supports flexible subcarrier spacing (SCS) configuration. Such as 120 kilohertz (Hz), 240KHz, etc. Future communications system evolution does not preclude the possibility that higher subcarrier spacing configurations may be supported. With such a larger subcarrier spacing configuration, the symbol duration is also scaled down, which results in a significant reduction in the absolute time occupied by the CP. Therefore, the problem of signal distortion may also exist between the scheduled PDSCHs in different time slots because the AGC circuit cannot complete the power adjustment in time. For example, referring to fig. 6, when the duration of the CP and the symbol between two slots is changed from (a) in fig. 6 to (b) in fig. 6, the AGC response time is changed from being smaller than the CP and PDCCH symbol length to exceeding the CP and PDCCH symbol length, thereby affecting the reception of the first several PDSCH symbols, causing signal distortion, and reducing the reception efficiency of the terminal.

In order to improve the receiving efficiency of the terminal, embodiments of the present application provide a data receiving and transmitting method, which are described below by way of a first embodiment and a second embodiment. It should be noted that the terms or expressions used in the embodiments of the present application may be mutually referred to, and are not limited.

The first embodiment,

An embodiment provides a data receiving method, as shown in fig. 7, the method includes:

701. the terminal receives the first PDSCH and the second PDSCH.

Wherein the transmission time of the first PDSCH is earlier than the transmission time of the second PDSCH. The spatial information associated with the first PDSCH and the second PDSCH are different.

The specific meaning of the spatial information can be referred to above. More specifically, the spatial information in the communication system may be indicated by a Transmission Configuration Indicator (TCI) in the DCI. In the transmission indication field in the DCI, a TCI state ID (transmission configuration indication state sequence number) is indicated, and the TCI state ID may be associated with one QCL information, which may specifically refer to the prior art.

Optionally, the first PDSCH and the second PDSCH are scheduled by the same DCI, or the first PDSCH and the second PDSCH are respectively scheduled by different DCIs.

For example, when the first PDSCH and the second PDSCH are scheduled through the same DCI, the DCI may indicate a combination of PDSCH time domain resources, and the combination may be used for the terminal to determine symbols occupied by the first PDSCH and the second PDSCH. For example, referring to table 1, DCI may indicate a combination of PDSCH time domain resources with index 5. In this case, symbols occupied by the first PDSCH and the second PDSCH scheduled by the DCI may be referred to fig. 8.

TABLE 1

For example, when the first PDSCH and the second PDSCH are scheduled through different DCIs, one DCI may indicate one PDSCH time domain resource, and another DCI may indicate another PDSCH time domain resource. For example, referring to table 2, one DCI may indicate PDSCH time domain resources with index 3, and another DCI may indicate PDSCH time domain resources with index 7. In this case, the symbols occupied by the first PDSCH and the second PDSCH scheduled by the two DCI may also be referred to fig. 8.

TABLE 2

Index	PDSCH time domain resources
		…	…
3	PDSCH mapping type B,S＝2,L＝4
		…	…
7	PDSCH mapping type B,S＝6,L＝4
		…	…

It should be noted that, table 1 and table 2 may be configured for the network device to the terminal through RRC signaling (for example, PDSCH _ Time domain allocation list in PDSCH _ config information unit in RRC signaling) or MAC CE signaling at a certain previous Time, and the subsequent network device only needs to indicate one or more items in the above table through DCI (for example, Time domain resource allocation field in DCI), so as to allocate symbols occupied by PDSCH to the terminal.

702. In case that an actual time interval between the first PDSCH and the second PDSCH is less than a predefined time interval, the terminal receives the second PDSCH if and only if a preset condition is satisfied.

In other words, in case that an actual time interval between the first PDSCH and the second PDSCH is less than the predefined time interval, the terminal does not receive the second PDSCH or considers the second PDSCH to be invalid or skips the reception of the second PDSCH when the preset condition is not satisfied. In this case, the terminal may add an indication bit to Negative Acknowledgement (NACK) feedback information for the second PDSCH, where the indication bit indicates, to the network device, a reason for the failure in transmitting the second PDSCH when the indication bit takes a specific value (e.g., 0 or 1), that is, the indication information indicates that the actual time interval is smaller than the predefined time interval and does not satisfy the preset condition.

Wherein the actual time interval refers to a time interval (e.g., a symbol length) between an end symbol in symbols occupied by the first PDSCH and a start symbol in symbols occupied by the second PDSCH.

Step 702 in a specific implementation, first, the terminal may determine a predefined time interval and an actual time interval. Secondly, the terminal determines whether the actual time interval is less than the predefined time interval. And under the condition that the actual time interval is smaller than the predefined time interval, further judging whether a preset condition is met or not so as to determine whether to receive the second PDSCH or not.

The predefined time interval may be determined based on the AGC response time or the actual communication scenario (e.g., based on the delay that the service needs meet), or may be determined in combination with the AGC response time and the actual communication scenario. The predefined time interval may also be preconfigured or protocol specified or configured for the terminal by the network device through RRC signaling or Media Access Control (MAC) Control Element (CE) signaling or DCI. The predefined time interval may also be expressed in future communication protocols as "minimum scheduling time interval", "beam switching delay", "data scheduling time domain offset (offset)", and other terms of the same technical nature. The value of the predefined time interval is described below by taking the predefined time interval as an example according to the AGC response time determination.

Regarding the values of the predefined time interval, there may be the following 4 cases.

In the first case: the predefined time interval is X microseconds (us), with X being greater than 0. The time unit of X may be other, for example, millisecond (ms), second(s), etc., and us is exemplified in the embodiment of the present application.

In the first case, the predefined time interval is a fixed value. In this case, X microseconds may be the AGC response time, for example. With the improvement of hardware capability, the response time of the AGC can be made shorter if possible. Then the value of X may be decreased accordingly.

In the first case, the terminal may directly determine the predefined time interval. When the terminal judges whether the actual time interval is smaller than the predefined time interval, the terminal can convert the predefined time interval into the number of symbols and then compare the number of symbols with the number of symbols of the actual time interval.

The method for converting the predefined time interval into the number of symbols may be:

in the second case: the predefined time interval is Y symbols, Y being an integer greater than 0.

In the second case, the predefined time interval is a relative value. The length of the predefined time interval varies with the time length of a single symbol.

In the second case, the terminal may directly determine the number of symbols of the predefined time interval. When the terminal determines whether the actual time interval is less than the predefined time interval, the number of symbols of the predefined time interval may be compared with the number of symbols of the actual time interval.

In the third case: the predefined time interval corresponds to a subcarrier interval.

In a third case, the terminal may determine the predefined time interval from the current subcarrier interval. The predefined time interval corresponding to the subcarrier interval may be several microseconds or several symbols. The correspondence between the predefined time interval and the subcarrier spacing may be pre-configured or protocol specified.

Illustratively, table 3 illustrates one possible correspondence between predefined time intervals and subcarrier intervals. Wherein, the values of any two parameters of the four parameters A1, B1, C1 and D1 can be the same or different. Any two of the four parameters a2, B2, C2 and D2 may have the same or different values, and this is not particularly limited in the embodiments of the present application.

TABLE 3

SCS	Predefined time interval
		15kHz	A1 microseconds or A2 symbols
30kHz	B1 microseconds or B2A symbol
		60kHz	C1 microseconds or C2 symbols
120kHz	D1 microseconds or D2 symbols

It should be noted that, the AGC response time of the terminal is assumed to be x microseconds, which is 4 times the time length of the next symbol configured with 15KHz subcarrier spacing. In order to allow operation of the communication system at 15KHz, the predefined time interval can only be set in terms of 4 x microseconds (i.e. the subcarrier spacing is configured to the time length of the next symbol at 15 KHz) if the communication system has only one defined AGC response time. In this case, when the subcarrier spacing is configured to be 240KHz, the predefined time interval is equivalent to occupying 16 symbols, which causes a waste of communication resources.

In the third case, the predefined time interval may be changed with the subcarrier interval, and the shortest delay may be taken under different subcarrier interval configurations. For example, at 15KHz, 1 OFDM symbol, and at 240KHz, in terms of actual x microseconds, only 4 OFDM symbols can satisfy the AGC response delay, which is greatly shortened compared to the above 16 OFDM symbols. Thus, the low-delay requirement of the URLLC service can be met.

In a fourth case: the predefined time interval corresponds to the type of terminal.

The different types of terminals may refer to terminals of different manufacturers, terminals with different costs, and the like.

In the future, the communication system supports the diversity of the terminal, and the AGC circuit as a front end circuit may also differentiate different costs and different performance performances (i.e. corresponding time delays) in the process of technology evolution. Therefore, the response time of the AGC circuit in different types of terminals may be different. For example, the response time of the AGC circuit in a low cost terminal may be long, and the response time of the AGC circuit in a high cost terminal may be short, or even tunable. Thus, the predefined time interval may correspond to the type of terminal.

In a fourth case, the method may further comprise:

11) the network equipment sends a user capability query request message to the terminal. Accordingly, the terminal receives the user capability query request message. The user capability query request message is for requesting capability information of the terminal.

12) And the terminal sends a user capability inquiry response message to the network equipment. Accordingly, the network device receives a user capability query response message from the terminal. The user capability query response message includes capability information of the terminal, and the capability information of the terminal includes information indicating a predefined time interval or an AGC response time of the terminal.

The preset condition includes one or more of the following conditions 1 to 3.

Condition 1, a ratio of the predefined time interval to a symbol length of the second PDSCH is less than or equal to a first preset threshold.

A ratio of a difference between the condition 2, the predefined time interval, and the actual time interval to a symbol length of the second PDSCH is less than or equal to a second preset threshold.

And in condition 3, the code rate of the second PDSCH is less than or equal to a third preset threshold.

The first preset threshold, the second preset threshold and the third preset threshold may be determined according to an actual application scenario. Illustratively, the first preset threshold may be 0.3. The second preset threshold may be 0.2. The third preset threshold may be 0.3.

Referring to fig. 9, when an interval between an end symbol of the first PDSCH and a start symbol of the second PDSCH is 3 symbols and an AGC response time is 4 symbols, data carried on a first symbol (i.e., symbol #9) in the second PDSCH may be distorted due to not satisfying the AGC response time, but data carried on other symbols has no influence. When the portion of the second PDSCH affected by the response time of the AGC is small, it is possible for the terminal to resolve the affected portion by code error correction. When the portion of the second PDSCH affected by the response time of the AGC is large, the terminal cannot correctly decode the second PDSCH.

When the second PDSCH satisfies one or more of the above-described conditions 1 to 3, the portion of the second PDSCH affected by the response time of the AGC is considered to be less. At this time, the terminal may normally receive the second PDSCH. Otherwise, the terminal may not receive the second PDSCH.

In the method provided in the first embodiment, at the terminal side, a time interval is predefined, and the terminal may determine whether to receive the second PDSCH according to the predefined time interval. Due to the influence of the AGC response time, under the condition that the preset condition is not satisfied, the terminal is likely to be unable to decode the second PDSCH, and the terminal skips the reception of the second PDSCH, thereby improving the reception efficiency of the terminal. Therefore, the influence of AGC response time on data reception of the terminal is reduced to the maximum extent, and the overall receiving efficiency and performance of the terminal are improved.

Since it is relatively easy to happen in some communication scenarios that the scheduling of the two PDSCHs does not meet the requirement of the response time of the AGC. Accordingly, the terminal may perform the above method in some scenarios, and for example, the terminal may perform the above method in one or more of scenarios 1 to 3.

In scenario 1, the mapping type of one PDSCH of the first PDSCH and the second PDSCH is type a or type B, and the mapping type of the other PDSCH is type B.

In scenario 1, the terminal may determine the mapping type of the first PDSCH and the second PDSCH according to the scheduling of the DCI.

Scene 2, the symbols occupied by the first PDSCH and the second PDSCH are located in the same time slot.

In scenario 2, the terminal may determine symbols occupied by the first PDSCH and the second PDSCH according to the scheduling of the DCI, and further determine whether the first PDSCH and the second PDSCH are located in the same time slot.

Scenario 3, the first PDSCH and the second PDSCH correspond to the same information bits.

The first PDSCH and the second PDSCH corresponding to the same information bits mean that the transport blocks or code blocks corresponding to the first PDSCH and the second PDSCH before coding contain the same information bits.

In scenario 3, in order to meet the requirements of low latency and high reliability, the terminal needs to consider a predefined time interval in a scenario of repeated transmission.

The terminal can determine whether the current transmission scene is the repeated transmission scene through the display configuration of the network equipment. Specifically, the terminal can know whether the current transmission scenario is a repeat transmission scenario through a high-level signaling. For example, the communication protocol may configure a higher layer signaling (e.g., RRC signaling) for a retransmission scenario in URLLC, where the higher layer signaling may include a parameter pdschpeettivitionsactor configured to be ON/OFF, or a specific number of repetitions. And when the signaling is ON or the repetition times are configured to be more than 1, the terminal determines that the current scene is a repeated transmission scene according to the parameter.

The terminal may also determine whether the current scenario is a repeated transmission scenario through default binding relationships with other parameters, for example, when the first PDSCH and the second PDSCH are associated with different RVs or different scrambling codes or different modulation orders, the terminal determines that the terminal is in the repeated transmission scenario.

The terminal may also determine whether the current transmission scenario is a duplicate transmission scenario in other manners. The embodiment of the present application is not particularly limited to this.

The predefined time interval has a certain limitation on the receiving behavior of the terminal, and in an application scenario where the reliability is not sensitive, the unnecessary limitation may adversely affect the actual communication efficiency. Thus, by adding applicable scenarios, such effects can be limited to important targeted scenarios.

It should be noted that scenarios 1 to 3 are only used for exemplary illustration of scenarios for performing the above-mentioned method. With the change of the subcarrier spacing configuration, if the time interval between the PDSCHs scheduled in the two slots respectively cannot meet the requirement of the response time of the AGC, the terminal also needs to perform the above method. The method can be determined according to the actual application scenario.

Optionally, before step 701, referring to fig. 10, the method includes:

700a, the first TRP transmits a first PDSCH to a terminal.

700b, the second TRP sends the second PDSCH to the terminal.

In this case, the step 701 may include, in a specific implementation: the terminal receives the first PDSCH from the first TRP and the second PDSCH from the second TRP.

Wherein the first TRP and the second TRP may be any one of the following cases.

Case 1, the first TRP and the second TRP are different TRPs.

In case 1, a first possible implementation manner, the first TRP and the second TRP are different base stations. At this time, the first TRP and the second TRP may each schedule the PDSCH through the DCI. For example, the first TRP schedules the first PDSCH through the first DCI, and the second TRP schedules the second PDSCH through the second DCI.

In case 1, in a second possible implementation manner, the first TRP and the second TRP are different antenna panels of the same base station. At this time, the base station may schedule the first PDSCH and the second PDSCH through the DCI and transmit to the terminal through the first TRP and the second TRP.

In case 1, in a third possible implementation manner, one of the first TRP and the second TRP may be an antenna panel of one base station (denoted as a first base station), and the other TRP may be an antenna panel of another base station (denoted as a second base station). In this case, the two base stations may each schedule the PDSCH through the DCI. For example, the first base station schedules the first PDSCH and transmits the first PDSCH to the terminal, and the second base station schedules the second PDSCH and transmits the second PDSCH to the terminal through the TRP (i.e., antenna panel).

Case 2, the first TRP and the second TRP are the same TRP

In case 2, the first TRP and the second TRP may be one base station or one antenna panel of one base station.

In case 2, the first PDSCH and the second PDSCH may be two PDSCHs transmitted through different beams by one TRP.

Optionally, the first PDSCH and the second PDSCH correspond to the same information bits. That is, the first PDSCH and the second PDSCH are two repeated transmissions of the same data. In this case, after step 701, optionally, the method further includes: and the terminal respectively processes the first PDSCH and the second PDSCH to obtain soft information and performs soft combination on the obtained soft information. The method can improve the reliability of data transmission and improve the success rate of data decoding.

In the first embodiment, the manner of scheduling data for the first TRP and the second TRP is not limited.

Example two

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

1101. the first TRP transmits the first PDSCH.

1102. The second TRP transmits the second PDSCH.

For a description of the first TRP and the second TRP, reference may be made to embodiment one, which is not described herein again.

Wherein, referring to fig. 12, the transmission time of the second PDSCH is later than the transmission time of the first PDSCH, and the time interval between the start symbol in the symbols occupied by the second PDSCH and the end symbol in the symbols occupied by the first PDSCH is greater than or equal to the predefined time interval. It should be noted that, when scheduling the second PDSCH, the second TRP needs to be scheduled according to a predefined time interval, that is, a time interval between a start symbol in symbols occupied by the scheduled second PDSCH and an end symbol in symbols occupied by the scheduled first PDSCH is greater than or equal to the predefined time interval.

The spatial information associated with the first PDSCH and the second PDSCH are different.

The specific meaning of the spatial information can be referred to above. More specifically, spatial information in the communication system may be indicated by the TCI in the DCI. In the transmission indication field in the DCI, a TCI state ID (transmission configuration indication state sequence number) is indicated, and the TCI state ID may be associated with one QCL information, which may specifically refer to the prior art.

For example, when the first PDSCH and the second PDSCH are scheduled through the same DCI, the DCI may indicate a combination of PDSCH time domain resources, and a time interval between a start symbol in symbols occupied by the second PDSCH and an end symbol in symbols occupied by the first PDSCH in the combination needs to be greater than or equal to a predefined time interval. For example, assuming that the predefined time interval is 1 symbol, referring to table 4, DCI may indicate a combination of PDSCH time domain resources with index 5. In this case, the symbols occupied by the first PDSCH and the second PDSCH scheduled by the DCI may be referred to in fig. 13.

TABLE 4

Index	Combination of PDSCH time domain resources
		…	…
5	PDSCH mapping type B,S＝2,L＝2&PDSCH mapping type B,S＝5,L＝2
		…	…

For example, when the first PDSCH and the second PDSCH are scheduled through different DCIs, one DCI may indicate time domain resources of the first PDSCH, and the other DCI may indicate time domain resources of the second PDSCH. The time interval between the start symbol in the symbols occupied by the second PDSCH and the end symbol in the symbols occupied by the first PDSCH needs to be greater than or equal to a predefined time interval. For example, assuming that the predefined time interval is 1 symbol, referring to table 5, one DCI may indicate PDSCH time domain resources with index 3, and another DCI may indicate PDSCH time domain resources with index 7. In this case, the symbols occupied by the first PDSCH and the second PDSCH scheduled by the two DCI may also be referred to fig. 13.

TABLE 5

It should be noted that, table 4 and table 5 may be configured for the network device to the terminal through RRC signaling (for example, PDSCH _ Time domain allocation list in PDSCH _ config information unit in RRC signaling) or MAC CE signaling at a certain previous Time, and the subsequent network device only needs to indicate one or more items in the above table through DCI (for example, Time domain resource allocation field in DCI) to allocate symbols occupied by PDSCH to the terminal.

The predefined time interval may be determined according to the AGC response time of the terminal or an actual communication scenario (e.g., according to a delay time that a service needs to be satisfied), or may be determined by combining the AGC response time and the actual communication scenario. The predefined time interval may also be pre-configured or protocol specified. The predefined time interval may also be expressed in future communication protocols as "minimum scheduling time interval", "beam switching delay", "data scheduling time domain offset (offset)", and other terms of the same technical nature. The value of the predefined time interval is described below by taking the predefined time interval as an example according to the AGC response time determination.

In the first case: the predefined time interval is Xus, and X is greater than 0. The time unit of X may be other, for example, millisecond (ms), second(s), etc., and us is exemplified in the embodiment of the present application.

In the first case, the second TRP may directly determine the predefined time interval when scheduling the second PDSCH. In a specific implementation, the second TRP may convert the predefined time interval into a number of symbols, and then schedule the second PDSCH according to the number of symbols.

In the second case, if the response time of the AGC does not exceed the time length of 1 symbol even in the maximum subcarrier spacing configuration, the predefined time interval of 1 symbol may be preconfigured directly or agreed in the protocol.

In the second case, the second TRP may directly determine the number of symbols of the predefined time interval and schedule the second PDSCH according to the number of symbols.

In a third case, the second TRP may determine the predefined time interval from the current subcarrier spacing. The predefined time interval corresponding to the subcarrier interval may be several microseconds or several symbols. The correspondence between the predefined time interval and the subcarrier spacing may be pre-configured or protocol specified.

An example of a possible correspondence between predefined time intervals and subcarrier intervals can be seen in table 3 in embodiment one.

In the third case, the predefined time interval may be changed with the subcarrier interval, and the shortest delay may be taken under different subcarrier interval configurations. For example, at 15KHz, 1 OFDM symbol, and at 240KHz, in terms of actual x microseconds, only 4 OFDM symbols can satisfy the AGC response delay, which is greatly shortened compared to the above 16 OFDM symbols. Thus, the low-delay requirement of the URLLC service can be met. In a fourth case: the predefined time interval corresponds to the type of terminal.

In a fourth case, referring to fig. 14, the method may further include:

(11) the second TRP transmits a user capability query request message to the terminal. Accordingly, the terminal receives the user capability query request message. The user capability query request message is used for requesting the capability information of the terminal;

(12) and the terminal sends a user capability inquiry response message to the second TRP. Accordingly, the network device receives a user capability query response message from the terminal. The user capability query response message includes capability information of the terminal, and the capability information of the terminal includes information indicating a predefined time interval or an AGC response time of the terminal.

1103. The terminal receives a first PDSCH from a first TRP.

1104. The terminal receives the second PDSCH from the second TRP.

The execution sequence of the step 1103 and the step 1104 is not sequential. In the second embodiment, the manner of receiving the first PDSCH and the second PDSCH by the terminal is not limited, and the terminal may directly receive the first PDSCH and the second PDSCH on the time domain resource configured by the first TRP and/or the second TRP, or may receive the first PDSCH and the second PDSCH by using the method shown in the first embodiment.

The second embodiment provides the method, since the first PDSCH and the second PDSCH are associated with different spatial information. Therefore, there may be a large signal reception power difference when the terminal receives the first PDSCH and the second PDSCH. If the starting symbol of the symbols occupied by the second PDSCH is adjacent to the ending symbol of the symbols occupied by the first PDSCH, the AGC circuit may not be able to perform power adjustment in time, thereby causing signal distortion. Embodiment two provides a method wherein there is a predefined time interval between the starting symbol of the time domain resources occupied by the second PDSCH and the ending symbol of the time domain resources occupied by the first PDSCH. The predefined time interval is reasonably configured, so that the predefined time interval meets the response time of the AGC circuit, the AGC circuit is ensured to timely adjust the power, signal distortion is avoided, and the receiving efficiency of the terminal is improved.

In some communication scenarios, it is relatively easy to schedule two consecutive PDSCHs, so that the time interval between symbols occupied by the PDSCHs does not meet the requirement of the response time of the AGC. Thus, the second TRP may schedule the second PDSCH according to a predefined time interval in certain scenarios, for example, the second TRP may perform the above method in one or more of scenario 1 and scenario 2.

Scenario 2, the first PDSCH and the second PDSCH correspond to the same information bits.

In scenario 2, it should be noted that the second TRP may schedule the second PDSCH according to a predefined time interval in a scenario of repeated transmission in URLLC, so as to meet the requirement of high latency and high reliability of URLLC.

The predefined time interval has a certain limitation on the reception behavior of the second TRP, and in an application scenario where reliability is not sensitive, it is likely that such unnecessary limitation may adversely affect the actual communication efficiency. Thus, by adding applicable scenarios, such effects can be limited to important targeted scenarios.

It should be noted that scenario 1 and scenario 2 are only used for exemplary illustration of the scenario for executing the above method. With the change of the subcarrier interval configuration, if the time interval between the PDSCHs scheduled in the two time slots respectively cannot meet the requirement of the response time of the AGC, the second TRP needs to schedule the second PDSCH according to the predefined time interval.

Optionally, the first PDSCH and the second PDSCH correspond to the same information bits. In this case, after step 1104, optionally, the method further comprises: and the terminal respectively processes the first PDSCH and the second PDSCH to obtain soft information and performs soft combination on the obtained soft information. The method can improve the reliability of data transmission and improve the success rate of data decoding.

The method provided by the application is suitable for a multi-point cooperative transmission scene of a plurality of TRPs, and each TRP can schedule the downlink data by adopting a method similar to the method for scheduling the downlink data by the first TRP or the second TRP. For convenience of description, the method provided by the present application is exemplarily illustrated in the first embodiment and the second embodiment of the present application by taking 2 TRPs for communication with a terminal as an example.

The above-mentioned scheme of the embodiment of the present application is introduced mainly from the perspective of interaction between network elements. It is to be understood that each network element, e.g., TRP and terminal, for implementing the above-described functions, includes at least one of corresponding hardware structures and software modules for performing each function. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, functional units may be divided between the TRP and the terminal according to the above method, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

In the case of using an integrated unit, fig. 15 shows a schematic diagram of a possible structure of a communication device (denoted as a communication device 150) in the above embodiments, where the communication device 150 includes a processing unit 1501, a communication unit 1502, and a storage unit 1503. The structural diagram shown in fig. 15 can be used to illustrate the structures of the TRP and the terminal involved in the above-described embodiments.

When the schematic configuration diagram shown in fig. 15 is used to illustrate the configuration of the terminal in the above-described embodiment, the processing unit 1501 is configured to control and manage the actions of the terminal, for example, the processing unit 1501 is configured to support the terminal to execute actions performed by the terminal in 701 and 702 in fig. 7 and 10, 1103 and 1104 in fig. 11, and (11) and (12) in fig. 14, and/or other processes described in this embodiment. The processing unit 1501 may communicate with other network entities, for example, the first TRP and the second TRP illustrated in fig. 10, through the communication unit 1502. The storage unit 1503 is used to store program codes and data of the terminal.

When the schematic configuration diagram shown in fig. 15 is used to illustrate the configuration of the terminal in the above embodiment, the communication device 150 may be a terminal or a chip in the terminal.

When the schematic structural diagram shown in fig. 15 is used to illustrate the structure of the TRP in the above-described embodiment, the processing unit 1501 is configured to control and manage the action of the TRP, for example, the processing unit 1501 is configured to support the TRP to execute actions executed by the TRP in 700a (in this case, the TRP is the first TRP) and 700b (in this case, the TRP is the second TRP) in fig. 10, 1101 (in this case, the TRP is the first TRP) and 1102 (in this case, the TRP is the second TRP) in fig. 11, (11) and (12) in fig. 14, and/or other procedures described in the embodiment of the present application. The processing unit 1501 may communicate with other network entities, for example, a terminal shown in fig. 10, through the communication unit 1502. The storage unit 1503 is used to store program codes and data of the TRP.

When the schematic structural diagram shown in fig. 15 is used to illustrate the structure of the TRP in the above-described embodiment, the communication device 150 may be the TRP or a chip within the TRP.

When the communication device 150 is a terminal or a TRP, the processing unit 1501 may be a processor or a controller, and the communication unit 1502 may be a communication interface, a transceiver circuit, a transceiver device, or the like. The communication interface is a generic term, and may include one or more interfaces. The storage unit 1503 may be a memory. When the communication device 150 is a terminal or a chip within a TRP, the processing unit 1501 may be a processor or a controller, and the communication unit 1502 may be an input/output interface, a pin, a circuit, or the like. The storage unit 1503 may be a storage unit (e.g., a register, a buffer, or the like) within the chip, or may be a storage unit (e.g., a read only memory, a random access memory, or the like) located outside the chip within a terminal or a TRP.

The communication unit may also be referred to as a transceiver unit. The antenna and the control circuit having a transmitting and receiving function in the communication apparatus 150 can be regarded as the communication unit 1502 of the communication apparatus 150, and the processor having a processing function can be regarded as the processing unit 1501 of the communication apparatus 150. Alternatively, a device in the communication unit 1502 for implementing a receiving function may be regarded as a receiving unit, where the receiving unit is configured to perform the receiving step in the embodiment of the present application, and the receiving unit may be a receiver, a receiving circuit, and the like. The device for realizing the transmission function in the communication unit 1502 can be regarded as a transmission unit for performing the steps of transmission in the embodiment of the present application, and the transmission unit can be a transmitter, a transmission circuit, or the like.

The integrated unit in fig. 15, if implemented in the form of a software functional module and sold or used as a separate product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially implemented as a part of or all or part of the technical solution contributed by the prior art, and the technical solution may be embodied in a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a TRP, etc.) or a processor (processor) to execute all or part of the steps of the methods described in the embodiments of the present application. A storage medium storing a computer software product comprising: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The elements in FIG. 15 may also be referred to as modules, and for example, the processing elements may be referred to as processing modules.

The embodiment of the present application further provides a hardware structure schematic diagram of a communication device (referred to as the communication device 160), and referring to fig. 16 or fig. 17, the communication device 160 includes a processor 1601 and optionally a memory 1602 connected to the processor 1601.

The processor 1601 may be a general processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more ics for controlling the execution of the program according to the present disclosure. The processor 1601 may also include a plurality of CPUs, and the processor 1601 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, or processing cores that process data (e.g., computer program instructions).

The memory 1602 may be a ROM or other type of static storage device that can store static information and instructions, a RAM or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, and is not limited in this respect. The memory 1602 may be separate or integrated with the processor 1601. The memory 1602 may include, among other things, computer program code. The processor 1601 is configured to execute the computer program code stored in the memory 1602, thereby implementing the methods provided by the embodiments of the present application.

In a first possible implementation, referring to fig. 16, the communication device 160 further comprises a transceiver 1603. The processor 1601, the memory 1602, and the transceiver 1603 are connected by a bus. The transceiver 1603 is used to communicate with other devices or a communication network. Optionally, the transceiver 1603 may include a transmitter and a receiver. The means in the transceiver 1603 for performing the receiving function can be considered as a receiver for performing the receiving step in the embodiments of the present application. The means in the transceiver 1603 for implementing the transmitting function can be considered as a transmitter for performing the steps of transmitting in the embodiments of the application.

Based on the first possible implementation manner, the structure diagram shown in fig. 16 may be used to illustrate the structure of the TRP or the terminal involved in the above embodiments.

When the schematic configuration shown in fig. 16 is used to illustrate the configuration of the terminal in the above embodiments, the processor 1601 is configured to control and manage the actions of the terminal, for example, the processor 1601 is configured to support the terminal to execute actions 701 and 702 in fig. 7 and 10, 1103 and 1104 in fig. 11, and (11) and (12) in fig. 14, and/or other processes described in the embodiments of the present application. The processor 1601 may communicate with other network entities, e.g. the first TRP and the second TRP shown in fig. 10, through the transceiver 1603. The memory 1602 is used for storing program codes and data of the terminal.

When the schematic diagram of the structure shown in fig. 16 is used to illustrate the structure of the TRP in the above-described embodiment, the processor 1601 is used to control and manage the action of the TRP, for example, the processor 1601 is used to support the TRP to execute actions executed by the TRP in 700a (in this case, the TRP is the first TRP) and 700b (in this case, the TRP is the second TRP) in fig. 10, 1101 (in this case, the TRP is the first TRP) and 1102 (in this case, the TRP is the second TRP) in fig. 11, (11) and (12) in fig. 14, and/or other procedures described in the embodiments of the present application. The processor 1601 may communicate with other network entities, e.g., the terminals shown in fig. 10, via the transceiver 1603. The memory 1602 is used to store program codes and data for TRP.

In a second possible implementation, the processor 1601 includes logic circuitry and at least one of an input interface and an output interface. Wherein the output interface is used for executing the sent action in the corresponding method, and the input interface is used for executing the received action in the corresponding method.

Based on the second possible implementation manner, referring to fig. 17, the schematic structure diagram shown in fig. 17 may be used to illustrate the structure of the TRP or the terminal involved in the above-described embodiment.

When the schematic configuration shown in fig. 17 is used to illustrate the configuration of the terminal in the above embodiments, the processor 1601 is configured to control and manage the actions of the terminal, for example, the processor 1601 is configured to support the terminal to execute actions 701 and 702 in fig. 7 and 10, 1103 and 1104 in fig. 11, and (11) and (12) in fig. 14, and/or other processes described in the embodiments of the present application. The processor 1601 may communicate with other network entities, for example, the first TRP and the second TRP shown in fig. 10, through at least one of the input interface and the output interface. The memory 1602 is used for storing program codes and data of the terminal.

When the schematic diagram of the structure shown in fig. 17 is used to illustrate the structure of the TRP in the above-described embodiment, the processor 1601 is used to control and manage the action of the TRP, for example, the processor 1601 is used to support the TRP to execute actions executed by the TRP in 700a (in this case, the TRP is the first TRP) and 700b (in this case, the TRP is the second TRP) in fig. 10, 1101 (in this case, the TRP is the first TRP) and 1102 (in this case, the TRP is the second TRP) in fig. 11, (11) and (12) in fig. 14, and/or other procedures described in the embodiments of the present application. The processor 1601 may communicate with other network entities, e.g., with the terminal shown in fig. 10, through at least one of the input interface and the output interface. The memory 1602 is used to store program codes and data for TRP.

In addition, the embodiment of the present application further provides a schematic diagram of a hardware structure of a terminal (denoted as terminal 180) and a TRP (denoted as TRP190), which may specifically refer to fig. 18 and fig. 19, respectively.

Fig. 18 is a schematic diagram of a hardware configuration of the terminal 180. For convenience of explanation, fig. 18 shows only main components of the terminal. As shown in fig. 18, the terminal 180 includes a processor, a memory, a control circuit, an antenna, and an input-output device.

The processor is mainly configured to process the communication protocol and the communication data, and control the entire terminal, execute a software program, process data of the software program, for example, to control the terminal to perform actions performed by the terminal in 701 and 702 in fig. 7 and 10, 1103 and 1104 in fig. 11, 11 (and 12) in fig. 14, and/or other processes described in this embodiment of the present application. The memory is used primarily for storing software programs and data. The control circuit (also referred to as a radio frequency circuit) is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The control circuit and the antenna together, which may also be called a transceiver, are mainly used for transceiving radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user.

When the terminal is started, the processor can read the software program in the memory, interpret and execute the instruction of the software program, and process the data of the software program. When data needs to be sent through the antenna, the processor performs baseband processing on the data to be sent, and then outputs baseband signals to a control circuit in the control circuit, and the control circuit performs radio frequency processing on the baseband signals and then sends the radio frequency signals to the outside through the antenna in the form of electromagnetic waves. When data is sent to the terminal, the control circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data.

Those skilled in the art will appreciate that fig. 18 shows only one memory and processor for ease of illustration. In an actual terminal, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, and the like, which is not limited in this application.

As an alternative implementation manner, the processor may include a baseband processor and a central processing unit, where the baseband processor is mainly used to process a communication protocol and communication data, and the central processing unit is mainly used to control the whole terminal, execute a software program, and process data of the software program. The processor in fig. 18 integrates the functions of the baseband processor and the central processing unit, and those skilled in the art will understand that the baseband processor and the central processing unit may be independent processors, and are interconnected through a bus or the like. Those skilled in the art will appreciate that the terminal may include a plurality of baseband processors to accommodate different network formats, a plurality of central processors to enhance its processing capability, and various components of the terminal may be connected by various buses. The baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit may also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built in the processor, or may be stored in the memory in the form of a software program, and the processor executes the software program to realize the baseband processing function.

Fig. 19 is a hardware configuration diagram of the TRP 190. TRP190 may include one or more radio frequency units such as Remote Radio Unit (RRU) 1901 and one or more baseband units (BBUs) (also referred to as Digital Units (DUs)) 1902.

The RRU1901, which may be referred to as a transceiver unit, transceiver, transceiving circuitry, or transceiver, etc., may include at least one antenna 1911 and a radio frequency unit 1912. The RRU1901 is mainly used for transceiving radio frequency signals and converting radio frequency signals to baseband signals. The RRU1901 and BBU1902 can be physically located together or physically located separately, e.g., a distributed base station.

The BBU1902 is a control center for TRP, and may also be referred to as a processing unit, and is mainly used for performing baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and the like.

In an embodiment, the BBU1902 may be formed by one or more boards, where the boards may jointly support a radio access network (e.g., an LTE network) with a single access indication, or may respectively support radio access networks (e.g., LTE networks, 5G networks, or other networks) with different access schemes. BBU1902 further includes a memory 1921 and a processor 1922, where memory 1921 is used to store necessary instructions and data. The processor 1922 is used to control the TRP to perform the necessary actions. The memory 1921 and processor 1922 may serve one or more boards. That is, the memory and processor may be provided separately on each board. Multiple boards may share the same memory and processor. In addition, each single board can be provided with necessary circuits.

It is to be understood that the TRP190 shown in fig. 19 is capable of performing the actions performed by the TRP in 700a (in this case, the TRP is the first TRP) and 700b (in this case, the TRP is the second TRP) in fig. 10, 1101 (in this case, the TRP is the first TRP) and 1102 (in this case, the TRP is the second TRP) in fig. 11, (11) and (12) in fig. 14, and/or other processes described in the embodiments of the present application. The operation, function, or both of the respective modules in the TRP190 are respectively configured to implement the corresponding procedures in the above-described method embodiments. Specifically, reference may be made to the description of the above method embodiments, and the detailed description is appropriately omitted herein to avoid redundancy.

In implementation, the steps of the method provided by this embodiment may be implemented by hardware integrated logic circuits in a processor or instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor. The description of the processor in fig. 16 and 17 can be referred to for the other description of the processor in fig. 18 and 19, and will not be repeated.

Embodiments of the present application also provide a computer-readable storage medium, which includes instructions that, when executed on a computer, cause the computer to perform any of the above methods.

Embodiments of the present application also provide a computer program product containing instructions which, when run on a computer, cause the computer to perform any of the methods described above.

An embodiment of the present application further provides a communication system, including: the TRP and the terminal.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented using a software program, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions described in accordance with the embodiments of the present application are all or partially generated upon loading and execution of computer program instructions on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). Computer-readable storage media can be any available media that can be accessed by a computer or can comprise one or more data storage devices, such as servers, data centers, and the like, that can be integrated with the media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

While the present application has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Although the present application has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and figures are merely exemplary of the present application as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A data receiving method, comprising:

a terminal receives a first Physical Downlink Shared Channel (PDSCH) and a second PDSCH, wherein the sending time of the first PDSCH is earlier than that of the second PDSCH, and spatial information associated with the first PDSCH is different from spatial information associated with the second PDSCH;

under the condition that the actual time interval between the first PDSCH and the second PDSCH is smaller than a predefined time interval, the terminal receives the second PDSCH if and only if a preset condition is met, wherein the actual time interval refers to the time interval between an end symbol in symbols occupied by the first PDSCH and a start symbol in symbols occupied by the second PDSCH;

the preset conditions include one or more of the following conditions: a ratio of the predefined time interval to a symbol length of the second PDSCH is less than or equal to a first preset threshold; a ratio of a difference between the predefined time interval and the actual time interval to a symbol length of the second PDSCH is less than or equal to a second preset threshold; the code rate of the second PDSCH is less than or equal to a third preset threshold.

2. The method of claim 1, wherein the first PDSCH and the second PDSCH are scheduled by the same DCI; or, the first PDSCH and the second PDSCH are scheduled through different DCI.

3. The method according to claim 1 or 2, wherein the predefined time interval is X microseconds, X being greater than 0; alternatively, the predefined time interval is Y symbols, Y being an integer greater than 0.

4. The method according to claim 1 or 2, wherein the predefined time interval corresponds to a subcarrier interval.

5. The method of claim 1 or 2, wherein the first PDSCH and the second PDSCH correspond to the same information bits.

6. The method of claim 3, wherein the first PDSCH and the second PDSCH correspond to a same information bit.

7. The method of claim 4, wherein the first PDSCH and the second PDSCH correspond to a same information bit.

8. The method of claim 1 or 2, wherein one of the first and second PDSCH has a mapping type of type A or type B and the other PDSCH has a mapping type of type B.

9. The method of claim 3, wherein one of the first PDSCH and the second PDSCH has a mapping type of type A or type B, and wherein the other PDSCH has a mapping type of type B.

10. The method of claim 4, wherein one of the first PDSCH and the second PDSCH has a mapping type of type A or type B, and wherein the other PDSCH has a mapping type of type B.

11. The method of claim 5, wherein one of the first PDSCH and the second PDSCH has a mapping type of type A or type B, and wherein the other PDSCH has a mapping type of type B.

12. The method of claim 1 or 2, wherein the symbols occupied by the first PDSCH and the second PDSCH are located in the same time slot.

13. The method of claim 3, wherein symbols occupied by the first PDSCH and the second PDSCH are located in a same time slot.

14. The method of claim 4, wherein symbols occupied by the first PDSCH and the second PDSCH are located in a same time slot.

15. The method of claim 5, wherein symbols occupied by the first PDSCH and the second PDSCH are located in a same time slot.

16. The method of claim 8, wherein symbols occupied by the first PDSCH and the second PDSCH are located in a same time slot.

17. A data transmission method, comprising:

and a second Physical Downlink Shared Channel (PDSCH) is transmitted by a second Transmission Receiving Point (TRP), the transmission time of the second PDSCH is later than that of the first PDSCH, the time interval between a starting symbol in symbols occupied by the second PDSCH and an ending symbol in symbols occupied by the first PDSCH is greater than or equal to a predefined time interval, and the spatial information associated with the first PDSCH is different from that associated with the second PDSCH.

18. The method of claim 17, wherein the first PDSCH and the second PDSCH are scheduled by the same downlink control information, DCI; or, the first PDSCH and the second PDSCH are scheduled through different DCI.

19. The method according to claim 17 or 18, wherein the predefined time interval is X microseconds, X being greater than 0; alternatively, the predefined time interval is Y symbols, Y being an integer greater than 0.

20. The method according to claim 17 or 18, wherein the predefined time interval corresponds to a subcarrier interval.

21. The method of claim 17 or 18, wherein the first PDSCH and the second PDSCH correspond to the same information bits.

22. The method of claim 19, wherein the first PDSCH and the second PDSCH correspond to the same information bits.

23. The method of claim 20, wherein the first PDSCH and the second PDSCH correspond to the same information bits.

24. The method of claim 17 or 18, wherein one of the first PDSCH and the second PDSCH has a mapping type of type a or type B and the other PDSCH has a mapping type of type B.

25. The method of claim 19, wherein one of the first PDSCH and the second PDSCH has a mapping type of type A or type B, and wherein the other PDSCH has a mapping type of type B.

26. The method of claim 20, wherein one of the first PDSCH and the second PDSCH has a mapping type of type A or type B, and wherein the other PDSCH has a mapping type of type B.

27. The method of claim 21, wherein one of the first PDSCH and the second PDSCH has a mapping type of type A or type B, and wherein the other PDSCH has a mapping type of type B.

28. A data receiving device, comprising: a communication unit and a processing unit;

the processing unit is configured to receive a first physical downlink shared channel PDSCH and a second PDSCH through the communication unit, where a transmission time of the first PDSCH is earlier than a transmission time of the second PDSCH, and spatial information associated with the first PDSCH and the second PDSCH are different;

the processing unit is further configured to receive the second PDSCH through the communication unit if and only if a preset condition is met under the condition that an actual time interval between the first PDSCH and the second PDSCH is smaller than a predefined time interval, where the actual time interval is a time interval between an end symbol in symbols occupied by the first PDSCH and a start symbol in symbols occupied by the second PDSCH;

29. The apparatus of claim 28, wherein the first PDSCH and the second PDSCH are scheduled by the same downlink control information, DCI; or, the first PDSCH and the second PDSCH are scheduled through different DCI.

30. The apparatus according to claim 28 or 29, wherein the predefined time interval is X microseconds, X being greater than 0; alternatively, the predefined time interval is Y symbols, Y being an integer greater than 0.

31. The apparatus according to claim 28 or 29, wherein the predefined time interval corresponds to a subcarrier interval.

32. The apparatus of claim 28 or 29, wherein the first PDSCH and the second PDSCH correspond to the same information bits.

33. The apparatus of claim 30, wherein the first PDSCH and the second PDSCH correspond to the same information bits.

34. The apparatus of claim 31, wherein the first PDSCH and the second PDSCH correspond to the same information bits.

35. The apparatus of claim 28 or 29, wherein one of the first PDSCH and the second PDSCH has a mapping type of type a or type B and the other PDSCH has a mapping type of type B.

36. The apparatus of claim 30, wherein one of the first PDSCH and the second PDSCH is mapped of type a or type B and the other PDSCH is mapped of type B.

37. The apparatus of claim 31, wherein one of the first PDSCH and the second PDSCH is mapped of type a or type B and the other PDSCH is mapped of type B.

38. The apparatus of claim 32, wherein one of the first PDSCH and the second PDSCH is mapped of type a or type B and the other PDSCH is mapped of type B.

39. The apparatus of claim 28 or 29, wherein symbols occupied by the first PDSCH and the second PDSCH are located in a same time slot.

40. The apparatus of claim 30, wherein symbols occupied by the first PDSCH and the second PDSCH are located in a same time slot.

41. The apparatus of claim 31, wherein symbols occupied by the first PDSCH and the second PDSCH are located in a same time slot.

42. The apparatus of claim 32, wherein symbols occupied by the first PDSCH and the second PDSCH are located in a same time slot.

43. The apparatus of claim 35, wherein symbols occupied by the first PDSCH and the second PDSCH are located in a same time slot.

44. A data transmission apparatus, comprising: a communication unit and a processing unit;

the processing unit sends a second Physical Downlink Shared Channel (PDSCH) through the communication unit, the sending time of the second PDSCH is later than that of the first PDSCH, the time interval between the starting symbol in the symbols occupied by the second PDSCH and the ending symbol in the symbols occupied by the first PDSCH is greater than or equal to a predefined time interval, and the spatial information associated with the first PDSCH is different from that associated with the second PDSCH.

45. The apparatus of claim 44, wherein the first PDSCH and the second PDSCH are scheduled by the same DCI; or, the first PDSCH and the second PDSCH are scheduled through different DCI.

46. The apparatus according to claim 44 or 45, wherein the predefined time interval is X microseconds, X being greater than 0; alternatively, the predefined time interval is Y symbols, Y being an integer greater than 0.

47. The apparatus according to claim 44 or 45, wherein the predefined time interval corresponds to a subcarrier interval.

48. The apparatus of claim 44 or 45, wherein the first PDSCH and the second PDSCH correspond to a same information bit.

49. The apparatus of claim 46, wherein the first PDSCH and the second PDSCH correspond to a same information bit.

50. The apparatus of claim 47, wherein the first PDSCH and the second PDSCH correspond to a same information bit.

51. The apparatus of claim 44 or 45, wherein one of the first PDSCH and the second PDSCH has a mapping type of type A or type B and the other PDSCH has a mapping type of type B.

52. The apparatus of claim 46, wherein one of the first PDSCH and the second PDSCH has a mapping type of type A or type B and the other PDSCH has a mapping type of type B.

53. The apparatus of claim 47, wherein one of the first PDSCH and the second PDSCH has a mapping type of type A or type B, and wherein another PDSCH has a mapping type of type B.

54. The apparatus of claim 48, wherein one of the first PDSCH and the second PDSCH has a mapping type of type A or type B and the other PDSCH has a mapping type of type B.

55. A data receiving device, comprising: a processor;

the processor is coupled to a memory for storing computer-executable instructions, the processor executing the computer-executable instructions stored by the memory to cause the apparatus to implement the method of any one of claims 1-16.

56. A data transmission apparatus, comprising: a processor;

the processor is coupled to a memory for storing computer-executable instructions, the processor executing the computer-executable instructions stored by the memory to cause the apparatus to implement the method of any one of claims 17-27.

57. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any of claims 1-16.

58. A computer-readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 17-27.