Method for repeated transmission of data

Abstract

Embodiments of the present application provide a data repetition transmission method and device. The method can utilize N beams to perform N times of data repetition transmission, where N is an integer greater than or equal to 2. The method comprises: a network device sending first indication information to a terminal device, the first indication information being used to indicate an i-th antenna port set and an i-th frequency domain resource of an i-th downlink shared data channel PDSCH, the i-th antenna port set including one or more antenna ports; and the terminal device receiving the i-th PDSCH from the network device on the i-th frequency domain resource by using the i-th antenna port set, the i-th PDSCH carrying i-th repeated data; where i is an integer from 1 to N.

Description

TECHNICAL FIELD

[0001] The present application relates to the communication technology field, and particularly relates to a data repetition transmission method. BACKGROUND

[0002] In a wireless communication system, a network device and a terminal device can perform data transmission based on a service scenario. The service scenario includes at least one of the following: enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC), and massive machine-type communications (mMTC).

[0003] The network device and the terminal device can perform uplink data transmission, for example, the terminal device sends uplink data to the network device; and / or, the network device and the terminal device can perform downlink data transmission, for example, the network device sends downlink data to the terminal device. SUMMARY

[0004] Embodiments of the present application provide a data repetition transmission method, which aims to reduce the processing complexity of a terminal device in multi-beam transmission, thereby reducing the power consumption of the terminal device.

[0005] In a first aspect, a data repetition transmission method is provided, including: receiving N pieces of repeated data from a network device, wherein the i-th piece of repeated data in the N pieces of repeated data is carried by an i-th physical downlink shared channel (PDSCH) on an i-th resource using an i-th antenna port set. The value of i is 1 to N, that is, the value of i traverses from 1 to N, and N is an integer greater than or equal to 2. The i-th resource includes an i-th frequency domain resource. The i-th antenna port set includes one or more antenna ports. The one or more antenna ports are the same as one or more antenna ports of a demodulation reference signal (DMRS) of the i-th PDSCH. Optionally, the N pieces of repeated data include N identical transport blocks (TBs).

[0006] In the above method, when downlink data is repeatedly transmitted using multiple beams, frequency domain resources are independently configured for each beam. At this time, a larger bandwidth does not need to be configured for each beam to utilize frequency diversity gain, so that the receiving and processing pressure of the terminal side can be reduced, thereby reducing the power consumption and cost of the terminal side.

[0007] In a possible implementation, the i-th frequency domain resource is predefined. By this method, the signaling overhead of configuring the i-th frequency domain resource can be saved.

[0008] In a possible implementation, the method comprises: receiving, from the network device, first indication information used for indicating the ith frequency domain resource. For example, the type of the first indication information is DCI, and a frequency domain resource allocation field in the first indication information is used for indicating the ith frequency domain resource. Through the method, the ith frequency domain resource can be configured according to parameters such as a channel condition, so that the receiving quality of a signal transmitted on the resource is higher.

[0009] In a possible implementation, the antenna ports included in the ith antenna port set are predefined. Through the method, the signaling overhead of configuring the ith antenna port set can be saved.

[0010] In a possible implementation, the method comprises: receiving, from the network device, first indication information used for indicating the antenna ports included in the ith antenna port set. The antenna ports included in the ith antenna port set are the antenna ports of the ith PDSCH, or the antenna ports of the DMRS of the ith PDSCH. For example, the type of the first indication information is DCI. Through the method, the antenna port set can be configured according to parameters such as a channel condition and / or required receiving energy, so that the receiving quality of a signal transmitted on the antenna port set is higher.

[0011] In a possible implementation, the ith resource includes an ith time domain resource, and the ith time domain resource is predefined. Through the method, the signaling overhead of configuring the ith time domain resource can be saved.

[0012] In a possible implementation, the ith resource includes an ith time domain resource, and the method comprises: receiving, from the network device, first indication information used for indicating the ith time domain resource. For example, the type of the first indication information is DCI, and a time domain resource allocation field in the first indication information is used for indicating the ith time domain resource. Through the method, the ith time domain resource can be configured according to parameters such as a traffic volume, so that resource waste can be avoided.

[0013] Optionally, the specific positions of any two of the first time domain resource to the Nth time domain resource can be the same or different, which is not limited in the embodiments of the application.

[0014] In a possible implementation, the method further comprises: receiving, from the network device, second indication information used for indicating QCL information of the DMRS of the ith PDSCH. Optionally, the QCL information can be regarded as QCL information of the ith antenna port set, and the one or more antenna ports in the ith antenna port set are one or more antenna ports of the DMRS of the ith PDSCH. Optionally, the QCL information can be regarded as QCL information corresponding to the ith frequency domain resource.

[0015] Since the PDSCH frequency domain resources corresponding to each antenna port set are independently configured, in order to match the channel conditions on each PDSCH frequency domain resource, by independently configuring the QCL information of the DMRS of the PDSCH corresponding to each antenna port set, the channel estimation of each PDSCH can be more accurately obtained, thereby the accuracy of demodulation and decoding of the PDSCH at the receiving end can be improved.

[0016] In a possible implementation, the second indication information is used to indicate the QCL information of the DMRS of the i-th PDSCH, including: the second indication information is used to indicate at least one signal that is QCL with the DMRS of the i-th PDSCH, and a QCL type of the DMRS of the i-th PDSCH and each signal in the at least one signal. Through this method, the system design can be simplified, and the QCL information of the DMRS of the i-th PDSCH can be flexibly and effectively indicated by a simple method.

[0017] In a possible implementation, the second indication information is used to indicate the QCL information of the DMRS of the i-th PDSCH, including: the second indication information is used to indicate M2 sets of QCL information, the QCL information of the DMRS of the i-th PDSCH includes the M2 sets of QCL information, and the M2 sets of QCL information are included in M1 sets of candidate QCL information. Wherein, M1 is an integer greater than or equal to 1, and M2 is an integer greater than or equal to 1 and less than or equal to M1. Any set of information in the M1 sets of candidate QCL information is used to indicate a signal and a QCL type, the DMRS of the i-th PDSCH and the signal are QCL, and the QCL type of the DMRS of the i-th PDSCH and the signal is the QCL type. Through this method, the signaling overhead when configuring the i-th QCL information can be saved.

[0018] In a possible implementation, the second indication information is used to indicate the QCL information of the DMRS of the i-th PDSCH, including: the second indication information is used to indicate one transmission configuration number-state (TCI-state), the one TCI-state is included in S1 TCI-states, and the one TCI-state is used to indicate at least one signal that is QCL with the DMRS of the i-th PDSCH, and to indicate the QCL type of the DMRS of the i-th PDSCH and each signal in the at least one signal. Wherein, each TCI-state in the S1 TCI-states is used to indicate at least one signal, and the corresponding QCL type of each signal in the at least one signal.

[0019] In a possible implementation, the method comprises: receiving third indication information from the network device, the third indication information being used for indicating information of the S1 TCIs.

[0020] By this method, signaling overheads in configuring the i-th QCL information can be saved.

[0021] In a possible implementation, the second indication information is used for indicating QCL information of DMRS of the i-th PDSCH, comprising: the second indication information is used for indicating one first pattern, the one first pattern being included in F1 candidate first patterns, each first pattern in the F1 candidate first patterns being used for indicating TCI-states, wherein r i is a number of sub-frequency domain resources included in the i-th frequency domain resource, and the TCI-state corresponding to the i-th frequency domain resource in the r i TCI-state is used for indicating at least one signal and a QCL type corresponding to each signal in the at least one signal, a second pattern indicated by the second indication information indicating the j-th TCI-state in the r i TCI-state corresponding to the i-th frequency domain resource, wherein the j-th sub-frequency domain resource of the i-th frequency domain resource is QCL with DMRS of a PDSCH transmitted on the j-th sub-frequency domain resource, and r i is an integer greater than or equal to 1, j takes a value from 1 to r i , and F1 is an integer greater than or equal to 1.

[0022] In a possible implementation, the method comprises: receiving third indication information from the network device, the third indication information being used for indicating the F1 candidate first patterns.

[0023] By this method, signaling overheads in configuring the i-th QCL information can be saved.

[0024] In a possible implementation, the second indication information is used for indicating QCL information of DMRS of the i-th PDSCH, comprising: the second indication information is used for indicating one second pattern, the one second pattern being included in P1 candidate second patterns, each second pattern in the P1 candidate second patterns being used for indicating a first pattern of each time unit in a group of time units. The first pattern is introduced as above, and will not be described herein again. For the first pattern of a first time unit indicated by the second pattern indicated by the second indication information, the first pattern indicates TCI-states, wherein r ia jthTCI-state in the TCI-state i a DMRS of a PDSCH transmitted on a jthsub-frequency domain resource of the ithfrequency domain resource and at least one signal indicated by the jthTCI-state are QCL. The ithPDSCH is transmitted in the first time unit.

[0025] In a possible implementation, the method comprises: receiving, from the network device, third indication information, the third indication information being used to indicate the P1 candidate second patterns.

[0026] By this method, signaling overhead in configuring the ithQCL information can be saved.

[0027] In a possible implementation, the second indication information is used to indicate QCL information of a DMRS of the ithPDSCH, comprising: the second indication information is used to indicate Z2 third patterns, the Z2 third patterns being included in Z1 candidate third patterns; wherein, for one third pattern in the Z2 third patterns, the one third pattern corresponds to one TCI-state, and the one third pattern is used to indicate elements, the elements one-to-one correspond to r elements of sub-frequency domain resources included in the 1stfrequency domain resource to the Nthfrequency domain resource, wherein, r i is a number of sub-frequency domain resources included in the ithfrequency domain resource, for the r elements corresponding to the ithfrequency domain resource in the Z1 candidate third patterns, one element in the r i elements, when a value of the one element is t1, a DMRS of the ithPDSCH transmitted on a sub-frequency domain resource corresponding to the one element and at least one signal indicated by the one TCI-state are QCL, and a corresponding QCL type is a QCL type indicated by the one TCI-state.

[0028] In a possible implementation, the method comprises: receiving, from the network device, third indication information, the third indication information being used to indicate the Z1 candidate third patterns.

[0029] By this method, signaling overhead in configuring the ithQCL information can be saved.

[0030] In a possible implementation, the second indication information is used to indicate the QCL information of the DMRS of the i-th PDSCH, including: the second indication information is used to indicate X2 fourth patterns, and the X2 fourth patterns are included in X1 candidate fourth patterns; wherein, for one fourth pattern among the X2 fourth patterns, the one fourth pattern corresponds to a TCI-state, and the one fourth pattern is used to indicate the TCI-state corresponding to each time unit in a group of time units. elements, the The elements correspond one-to-one to the first frequency domain resource to the Nth frequency domain resource. sub-frequency domain resources, where r i is the number of sub-frequency domain resources included in the i-th frequency domain resource; for the first time unit The r corresponding to the i-th frequency domain resource in the element i An element in the elements, when the value of the element is t1, the DMRS of the i-th PDSCH transmitted on the sub-frequency domain resource corresponding to the element and at least one signal indicated by the TCI state is QCL, and the TCI-state is also used to indicate the QCL type corresponding to each signal in the at least one signal, wherein the i-th PDSCH is transmitted in the first time unit.

[0031] In a possible implementation, the method includes: receiving third indication information from the network device, where the third indication information is used to indicate the X1 candidate fourth patterns.

[0032] Through this method, the signaling overhead when configuring the i-th QCL information can be saved.

[0033] According to a second aspect, a method for repeated transmission of data is provided, comprising: sending N repeated data to a terminal device, wherein the i-th repeated data in the N repeated data is carried by the i-th physical downlink shared channel PDSCH on the i-th resource using the i-th antenna port set. The value of i ranges from 1 to N, that is, the value of i traverses from 1 to N, N is an integer greater than or equal to 2, and the i-th resource includes the i-th frequency domain resource. The i-th antenna port set includes one or more antenna ports. The one or more antenna ports are the same as the one or more antenna ports of the demodulation reference signal DMRS of the i-th PDSCH. Optionally, the N repeated data include N identical transport blocks TB.

[0034] For the introduction of the i-th resource, the i-th antenna port set, the i-th PDSCH, the DMRS of the i-th PDSCH, etc., please refer to the first aspect and will not be repeated here.

[0035] In a third aspect, an apparatus, which can be a terminal device or another apparatus capable of implementing the method described in the first aspect, is provided. The other apparatus can be installed in the terminal device or can be used in conjunction with the terminal device. In one design, the apparatus can include modules corresponding to each of the steps of the method described in the first aspect, which can be implemented in hardware circuitry, software code or a combination of the two. In one design, the apparatus can include a processing module and a communication module.

[0036] In one possible design, the communication module can be configured to receive, from a network device, N repetitions of data, where the i-th repetition of the N repetitions is carried by an i-th physical downlink shared channel (PDSCH) using an i-th set of antenna ports on an i-th resource. i can take values from 1 to N, i.e., i can take values from 1 through N, and N can be an integer greater than or equal to 2. The i-th resource can include an i-th frequency domain resource. The processing module can be configured to process (e.g., demodulate and decode) the PDSCH.

[0037] The i-th resource, the i-th set of antenna ports, the i-th PDSCH, the DMRS of the i-th PDSCH, etc. can be as described in the first aspect, which will not be repeated here.

[0038] In a fourth aspect, an apparatus, which can be a network device or another apparatus capable of implementing the method described in the second aspect, is provided. The other apparatus can be installed in the network device or can be used in conjunction with the network device. In one design, the apparatus can include modules corresponding to each of the steps of the method described in the second aspect, which can be implemented in hardware circuitry, software code or a combination of the two. In one design, the apparatus can include a processing module and a communication module.

[0039] In one possible design, the communication module can be configured to transmit, to a terminal device, N repetitions of data, where the i-th repetition of the N repetitions is carried by an i-th physical downlink shared channel (PDSCH) using an i-th set of antenna ports on an i-th resource. i can take values from 1 to N, i.e., i can take values from 1 through N, and N can be an integer greater than or equal to 2. The i-th resource can include an i-th frequency domain resource. The processing module can be configured to generate the PDSCH.

[0040] The i-th resource, the i-th set of antenna ports, the i-th PDSCH, the DMRS of the i-th PDSCH, etc. can be as described in the second aspect, which will not be repeated here.

[0041] In a fifth aspect, an embodiment of the present application provides a device, which comprises a processor configured to implement the method described in the first aspect. The device can further comprise a memory configured to store instructions. The memory is coupled to the processor, and when the processor executes the instructions stored in the memory, the method described in the first aspect can be implemented. The device can further comprise a communication interface configured to enable the device to communicate with another device. In an embodiment of the present application, the communication interface can be a transceiver, a circuit, a bus, a module, a pin, or another type of communication interface. In this case, the other device can be a network device.

[0042] In a possible design, the device includes:

[0043] a memory configured to store program instructions;

[0044] a processor configured to receive, by using the communication interface, N pieces of repeated data from a network device, where the i th< piece of repeated data in the N pieces of repeated data is carried by an i th< PDSCH on an i th< resource by using an i th< set of antenna ports. i takes a value from 1 to N, i.e., i takes a value from 1 to N in a traversal manner, N is an integer greater than or equal to 2, and the i th< resource includes an i th< frequency domain resource.

[0045] For details about the i th< resource, the i th< set of antenna ports, the i th< PDSCH, the DMRS of the i th< PDSCH, and the like, refer to the first aspect, which will not be repeated here.

[0046] In a sixth aspect, an embodiment of the present application provides a device, which comprises a processor configured to implement the method described in the second aspect. The device can further comprise a memory configured to store instructions. The memory is coupled to the processor, and when the processor executes the instructions stored in the memory, the method described in the second aspect can be implemented. The device can further comprise a communication interface configured to enable the device to communicate with another device. In an embodiment of the present application, the communication interface can be a transceiver, a circuit, a bus, a module, a pin, or another type of communication interface. In this case, the other device can be a terminal device.

[0047] In a possible design, the device includes:

[0048] a memory configured to store program instructions;

[0049] The processor is configured to send N pieces of repeated data to the terminal device by using the communication interface, wherein the i th piece of repeated data in the N pieces of repeated data is carried by an i th physical downlink shared channel (PDSCH) on an i th resource by using an i th antenna port set. i is an integer from 1 to N, i.e., i is from 1 to N, and N is an integer greater than or equal to 2. The i th resource includes an i th frequency domain resource.

[0050] For details about the i th resource, the i th antenna port set, the i th PDSCH, the DMRS of the i th PDSCH, and the like, refer to the second aspect, which will not be repeated here.

[0051] In a seventh aspect, a communication system is provided, including the apparatus of the third aspect or the fifth aspect, and the apparatus of the fourth aspect or the sixth aspect.

[0052] In an eighth aspect, a computer-readable storage medium is provided, including instructions that, when executed on a computer, cause the computer to perform the method of the first aspect or the second aspect.

[0053] In a ninth aspect, a computer program product is provided, including instructions that, when executed on a computer, cause the computer to perform the method of the first aspect or the second aspect.

[0054] In a tenth aspect, a chip system is provided, including a processor, and can further include a memory for implementing the method of the first aspect or the second aspect. The chip system can be composed of a chip, or can include a chip and other discrete devices. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1 An example flowchart of a repeated transmission method of downlink data provided by an embodiment of the present application is shown;

[0056] Figure 2 An example time-frequency resource grid provided by an embodiment of the present application is shown;

[0057] Figure 3 An example diagram of a repeated transmission method of downlink data provided by an embodiment of the present application is shown;

[0058] Figure 4 And Figure 5 An example diagram of a candidate first pattern provided by an embodiment of the present application is shown;

[0059] Figure 6 An example diagram of a candidate second pattern provided by an embodiment of the present application is shown;

[0060] Figure 7 An example diagram of a candidate third pattern provided by an embodiment of the present application is shown;

[0061] Figure 8 Fig. 4 shows a candidate fourth pattern example provided by an embodiment of the present application;

[0062] Figure 9 Fig. 5 shows a flow example of data transmission between a base station and a UE provided by an embodiment of the present application;

[0063] Figures 10-11 Fig. 6 shows a device structure example provided by an embodiment of the present application. DETAILED DESCRIPTION

[0064] The technical solutions provided by the embodiments of the present application can be applied to various communication systems, for example: a long term evolution (LTE) system, a 5th generation (5G) mobile communication system, a wireless-fidelity (WiFi) system, a future communication system, or a system integrating multiple communication systems, etc., and the embodiments of the present application are not limited thereto. The 5G can also be referred to as a new radio (NR).

[0065] The technical solutions provided by the embodiments of the present application can be applied to various communication scenarios, for example, can be applied to one or more of the following communication scenarios: eMBB communication, URLLC, machine type communication (MTC), mMTC, device-to-device (D2D) communication, vehicle to everything (V2X) communication, vehicle to vehicle (V2V) communication, and internet of things (IoT), etc. Optionally, the mMTC can include one or more of the following communications: communication of an industrial wireless sensor network (IWSN), communication in a video surveillance scenario, and communication of a wearable device, etc.

[0066] The technical scheme provided by the embodiments of the present application can be applied to communication between communication devices. The communication between the communication devices can include communication between a network device and a terminal device, communication between network devices, and / or communication between terminal devices. In the embodiments of the present application, the term "communication" can also be described as "transmission", "information transmission", or "signal transmission", etc. The transmission can include sending and / or receiving. The technical scheme of the embodiments of the present application is described by taking the communication between the network device and the terminal device as an example, and the technical scheme can also be used for communication between other scheduling entities and subordinate entities, for example, communication between a macro base station and a micro base station, and communication between a first terminal device and a second terminal device. The scheduling entity can allocate air interface resources to the subordinate entity. The air interface resources include one or more of the following resources: time domain resources, frequency domain resources, code resources, and space resources. In the embodiments of the present application, the number of the above-mentioned resources can be two, three, four, or more, which is not limited in the embodiments of the present application.

[0067] In the embodiments of the present application, the communication between the network device and the terminal device includes that the network device sends a downlink signal or information to the terminal device, and / or the terminal device sends an uplink signal or information to the network device.

[0068] In the embodiments of the present application, " / " can represent that the objects associated before and after are in an "or" relationship, for example, A / B can represent A or B; "and / or" can be used to describe three relationships of associated objects, for example, A and / or B, which can represent three cases of A alone, A and B together, and B alone. Wherein A and B can be singular or plural. In the embodiments of the present application, "first", "second", "A", "B", etc. can be used to distinguish functionally identical or similar technical features. The "first", "second", "A", "B", etc. do not limit the quantity and execution order, and the "first", "second", etc. do not necessarily mean different. In the embodiments of the present application, the words "exemplary" or "for example" are used to represent examples, illustrations, or descriptions. The embodiments or design schemes described as "exemplary" or "for example" should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. The words "exemplary" or "for example" are intended to present the relevant concepts in a specific manner, and facilitate understanding.

[0069] The terminal device involved in the embodiments of the present application can also be referred to as a terminal, which can be a device with wireless transceiving function. The terminal can be deployed on land, including indoors, outdoors, handheld, and / or vehicle-mounted; can also be deployed on water surface (such as ships, etc.); and can also be deployed in the air (such as airplanes, balloons, and satellites, etc.). The terminal device can be a user equipment (UE). The UE includes a handheld device, a vehicle-mounted device, a wearable device, or a computing device with wireless communication function. Exemplarily, the UE can be a mobile phone, a tablet computer, or a computer with wireless transceiving function. The terminal device can also be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in remote medical treatment, a wireless terminal in smart grid, a wireless terminal in smart city, and / or a wireless terminal in smart home, etc.

[0070] The network device involved in the embodiments of the present application includes a base station (BS), which can be a device deployed in a wireless access network and capable of wireless communication with a terminal device. The base station can have various forms, such as a macro base station, a micro base station, a relay station, or an access point, etc. The base station involved in the embodiments of the present application can be a base station in a 5G system, a base station in an LTE system, or a base station in other systems, without limitation. Among them, the base station in the 5G system can also be referred to as a transmission reception point (TRP) or a next generation Node B (gNB or gNodeB).

[0071] In a communication system, such as an NR system or other system, a light terminal device can be introduced relative to a traditional terminal device, such as an eMBB terminal. The light terminal device can also be referred to as a reduced capability (REDCAP) terminal. Among them, the eMBB terminal is a terminal capable of transmitting eMBB service. Relative to the REDCAP terminal, the traditional terminal device can be a high capability terminal or a terminal without capability limitation. In the embodiments of the present application, the traditional terminal device can be replaced by a high capability terminal introduced in the future relative to the REDCAP terminal. Exemplarily, the feature comparison between the high capability terminal and the REDCAP terminal satisfies at least one of the following first to ninth items. Among them, at least one can be one or more, such as 2, 3, or more, without limitation in the embodiments of the present application.

[0072] The first item is: The maximum bandwidth supported by the high-capability terminal is greater than the maximum bandwidth supported by the REDCAP terminal. For example, the maximum bandwidth supported by the high-capability terminal is 100 MHz (megahertz) or 200 MHz, while the maximum bandwidth supported by the REDCAP terminal is 20 MHz, 10 MHz, or 5 MHz.

[0073] The second item: The high-capability terminal has more antennas than the REDCAP terminal. This number of antennas can be the number of antennas configured for the terminal, or the maximum number of antennas used for transmission and / or reception. For example, a high-capability terminal supports up to 4 antennas for reception and 2 antennas for transmission, while a REDCAP terminal supports up to 2 antennas for reception and 1 antenna for transmission. Alternatively, even if the high-capability terminal has the same number of antennas as an NR REDCAP terminal, its capabilities for antenna selective transmission differ. For example, a high-capability terminal and a low-capability terminal both support 2-antenna transmission, but the high-capability terminal supports antenna selective transmission, while the low-capability terminal does not. Taking single-antenna port data transmission as an example, a high-capability terminal can switch the single-antenna port data transmission between two transmit antennas, which can achieve spatial diversity gain. However, a low-capability terminal can only transmit data on two transmit antennas simultaneously, which is equivalent to the transmission performance of a single transmit antenna.

[0074] Item 3: The maximum transmit power supported by a high-capability terminal is greater than the maximum transmit power supported by a REDCAP terminal. For example, the maximum transmit power supported by a high-capability terminal is 23 decibel-milliwatt (dBm) or 26dBm, while the maximum transmit power supported by a REDCAP terminal is a value between 4dBm and 20dBm.

[0075] Item 4: High-capability terminals support carrier aggregation (CA), while REDCAP terminals do not support CA.

[0076] Item 5: When both high-capability terminals and REDCAP terminals support carrier aggregation, the maximum number of carriers supported by the high-capability terminal is greater than the maximum number of carriers supported by the REDCAP terminal. For example, a high-capability terminal supports a maximum of 32 carriers or 5 carrier aggregation, while a REDCAP terminal supports a maximum of 2 carrier aggregation.

[0077] Item 6: High-capability terminals and REDCAP terminals were introduced in different protocol versions. For example, in the NR protocol, high-capability terminals were introduced in Release (R) 15, and REDCAP terminals were introduced in Release 17.

[0078] Item 7: High-capability terminals and REDCAP terminals have different duplex capabilities. High-capability terminals have stronger duplex capabilities. For example, high-capability terminals support full-duplex frequency division duplex (FDD), meaning they can receive and transmit simultaneously when supporting FDD. REDCAP terminals support half-duplex FDD, meaning they cannot receive and transmit simultaneously when supporting FDD.

[0079] Item 8: The data processing capability of a high-capability terminal is greater than that of a REDCAP terminal. A high-capability terminal can process more data in the same amount of time, or a high-capability terminal can process the same data in a shorter amount of time. For example, let T1 be the time it takes for a terminal to receive downlink data from a network device, and T2 be the time it takes for the terminal to send feedback on the downlink data to the network device after processing the downlink data. The delay (time difference) between T2 and T1 for a high-capability terminal is less than the delay between T2 and T1 for a REDCAP terminal. The feedback for the downlink data can be either ACK or NACK feedback.

[0080] Item 9: The peak data transmission rate of the high-capability terminal is greater than the peak data transmission rate of the REDCAP terminal. Data transmission includes uplink data transmission (i.e., the terminal sends data to the network device) and / or downlink data transmission (i.e., the terminal receives data from the network device).

[0081] Optionally, for ease of distinction, in the embodiments of the present application, high-capability terminals may also be referred to as non-REDCAP terminals. REDCAP terminals can be applied to various scenarios such as the Internet of Things, mMTC, or V2X. As described above, the limited capabilities of REDCAP terminals will result in limited uplink and / or downlink coverage of the terminal, thereby affecting the data transmission rate. In order to improve the coverage of REDCAP terminals, the embodiments of the present application provide a method for repeated transmission of data, and in particular, a method for repeated transmission of downlink data.

[0082] Optionally, the method provided in the embodiment of the present application can also be applied to other types of terminals, such as high-capability terminals (such as eMBB terminals, or URLLC terminals that support URLLC services), to improve the coverage of the terminal, thereby improving the user experience. To simplify the description, the embodiment of the present application is described using a REDCAP terminal as an example.

[0083] In embodiments of the present application, the apparatus for implementing the function of the terminal device can be a terminal device; or can be an apparatus capable of supporting the terminal device to implement the function, such as a chip system. The apparatus can be installed in the terminal device or used in matching with the terminal device. In embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices. In the technical solutions provided in embodiments of the present application, the apparatus for implementing the function of the terminal device is a terminal device, and taking the terminal device as an example of UE, the technical solutions provided in embodiments of the present application are described.

[0084] In embodiments of the present application, the apparatus for implementing the function of the network device can be a network device; or can be an apparatus capable of supporting the network device to implement the function, such as a chip system. The apparatus can be installed in the network device or used in matching with the network device. In the technical solutions provided in embodiments of the present application, the apparatus for implementing the function of the network device is a network device, and taking the network device as an example of a base station, the technical solutions provided in embodiments of the present application are described.

[0085] As shown in FIG. 1, a communication system includes a UE and a base station. Figure 1 FIG. 2 shows a method for repeated transmission of downlink data provided in embodiments of the present application.

[0086] At operation 101, the base station sends N pieces of repeated data to the UE, where the i th piece of repeated data in the N pieces of repeated data is carried by the i th antenna port set on the i th resource through the i th downlink channel. Wherein, the value of i is 1 to N, and N is an integer greater than or equal to 2. Optionally, the value of i can also be 0 to N-1. For example, N is 2, 3, 4, 6 or other integers, which are not limited in embodiments of the present application. Correspondingly, at operation 102, the UE receives the N pieces of repeated data from the base station.

[0087] In the communication system, the UE can access the base station and communicate with the base station. Exemplarily, one base station can manage one or more (for example, 2, 3 or 6, etc.) cells, and the UE can access the base station in at least one of the one or more cells and communicate with the base station in the cell accessed by the UE. Wherein, the UE accessing the base station in the at least one cell can also be described as: the UE accessing the at least one cell. In embodiments of the present application, the at least one can be 1, 2, 3 or more, which are not limited in embodiments of the present application. In embodiments of the present application, the plurality can be 2, 3, 4 or more, which are not limited in embodiments of the present application.

[0088] In the embodiments of the present application, the base station can send downlink data to the UE through a downlink channel, for example, a downlink physical channel. The downlink channel can be a physical downlink shared channel (PDSCH) or a channel with other names, and the embodiments of the present application do not make any limitation. For ease of description, the downlink channel is taken as the PDSCH in the following embodiments of the present application. In the embodiments of the present application, the base station sending downlink data to the UE through the PDSCH can also be described as: the base station sending the PDSCH to the UE, and the PDSCH carrying the downlink data.

[0089] In the embodiments of the present application, the base station sending N pieces of repeated data to the UE includes sending N pieces of repeated transport blocks (TBs) to the UE. The N pieces of repeated TBs are N TBs carrying the same information. For example, the N pieces of TBs carrying the same information are N identical TBs, or the N pieces of TBs carrying the same information are N TBs with different redundancy versions. When the base station sends one TB to the UE, the TB can also be subjected to a physical layer operation. The physical layer operation includes at least one of the following sub-operations: segmentation, cyclic redundancy check (CRC) addition, channel coding, scrambling, layer mapping, precoding, and modulation. When the base station repeatedly sends N TBs to the UE, for any two TBs, the physical layer operations for the two TBs can be the same or different; if the physical layer operations for the two TBs both include a same sub-operation, the configuration parameters for the sub-operation can be the same or different, and the embodiments of the present application do not make any limitation. For example, if the physical layer operations for the two TBs both include channel coding, the code rates can be different; and / or, if the physical layer operations for the two TBs both include modulation, the modulation orders can be different.

[0090] When the base station transmits the PDSCH to the UE, the base station can perform a physical layer operation on a bit stream of a TB carried on the PDSCH, convert an output signal of the physical layer operation into a radio frequency signal, and transmit the radio frequency signal to the UE through an antenna array on the base station side. The base station can use a beamforming technology based on the antenna array to transmit the PDSCH in the form of a beam. The antenna array can be installed on the base station, connected (in a wired or wireless manner) to the base station, or exist in other forms on the base station side, which is not limited by the embodiments of the present application. The beamforming technology concentrates the transmission energy in a certain direction, such as the direction of the UE, by weighting the large-scale antenna array, thereby increasing the efficiency of the UE receiving the downlink signal and increasing the coverage distance of the network. However, since the energy of the beam is concentrated in the longitudinal distance direction, the beamforming technology may narrow the horizontal coverage range of the transmitted radio frequency signal. Compared with the traditional horizontal wide beam transmission technology, when the UE moves out of the horizontal coverage range of the beam, the communication between the UE and the base station may be quickly weakened or even interrupted when the beamforming technology is used. Beam recovery can be performed after the communication is interrupted, but the beam recovery requires a long time, about 100 milliseconds (ms). In order to increase the coverage of the network, the base station can repeatedly transmit downlink data to the UE through multiple beams, for example, repeatedly transmitting data on each beam once to increase the robustness of the transmitted data.

[0091] The method based on the beamforming technology provided by the embodiments of the present application can be applied to a frequency range (frequency range, FR) 2 frequency band. The FR2 frequency band is a millimeter wave (millimeter wave, MMW) frequency band with a frequency value greater than 24 gigahertz (giga hertz, GHz). In the FR2 frequency band, one or more frequency bands can be set, and the bandwidth of each frequency band can be one value in the range of 850 MHz to 3250 MHz. The base station can use the frequency domain resources in the frequency band to transmit data with the UE. Since the MMW frequency band antenna size is small, it is beneficial to the application of large-scale antenna arrays, and thus it is beneficial to apply the beamforming technology. However, the embodiments of the present application are not limited thereto, and the method provided by the embodiments of the present application can also be applied to other frequency bands, such as the FR1 frequency band, or other radio frequency bands between 6 GHz and 24 GHz. Among them, the FR1 frequency band is a frequency band with a frequency value less than 6 GHz.

[0092] In a possible implementation, the base station and the UE can use an antenna port to transmit the PDSCH in the form of a beam through a physical transmitting antenna.

[0093] The base station and the UE can transmit the PDSCH with one or more antenna ports. Each of the plurality of antenna ports can correspond to a same time-frequency resource grid. The time-frequency resource grid can be used to describe time-frequency resources within a time unit. The time unit can include one or more symbols. The time unit can be a subframe, a slot, or the like, which is not limited in the embodiments of the present application. For example Figure 2 An example of a time-frequency resource grid is shown, which includes 14 symbols in time domain and one or more subcarriers in frequency domain. One symbol in time domain and one subcarrier in frequency domain form one resource element (RE). The RE is the smallest time-frequency resource granularity for mapping data. Optionally, one or more (e.g., 6 or 12, etc.) subcarriers can be included in one resource block (RB). The RB can also include time domain concept, for example, one or more (e.g., 2, 4, 7, or 14, etc.) symbols in time domain and one or more subcarriers in frequency domain form a group of REs included in one RB, or described as one RB including one or more symbols in time domain and one or more subcarriers in frequency domain. For example Figure 2 As shown, 1 RB includes 12 subcarriers in frequency domain.

[0094] An antenna port is a logical concept. One antenna port can correspond to one physical transmit antenna or can correspond to multiple physical transmit antennas. In both cases, the UE can not need to know whether the PDSCH from the same antenna port is from one or multiple physical transmit antennas. To implement the reception of the PDSCH, the UE can not need to know whether the PDSCH is a PDSCH transmitted by a single physical transmit antenna or is a PDSCH combined from multiple PDSCHs transmitted by multiple physical transmit antennas, the UE resolves the antenna port to which the PDSCH corresponds. In one possible implementation, the antenna port of the demodulation reference signal (DMRS) of the PDSCH can be configured in a predefined manner or in a manner indicated by the base station to the UE by signaling. The antenna port of the PDSCH and the antenna port of the DMRS of the PDSCH correspond to each other. In other words, one antenna port of the PDSCH uniquely corresponds to one antenna port of the DMRS of the PDSCH. For example, the two antenna ports are the same antenna port. For a PDSCH transmitted by one antenna port, the UE can receive the DMRS transmitted on the antenna port, perform channel estimation using the received DMRS, and demodulate and decode the PDSCH using the channel estimation result. For a PDSCH transmitted by multiple antenna ports, the UE can receive the DMRS transmitted on each antenna port, perform channel estimation using the received multiple DMRSs, and demodulate and decode the PDSCH using the channel estimation result.

[0095] When the base station and the UE implement beam-based data transmission using antenna ports, one beam can be formed by the weighting of signals transmitted on one or more antenna ports. The one or more antenna ports used to form one beam can be regarded as an antenna port set. For example, signals transmitted on n antenna ports are used to form one beam y, where n is an integer greater than or equal to 1, and it can be considered that where j takes a value from 0 to n-1, s j represents a signal transmitted on the j+1th antenna port, w j represents a weighting coefficient of the signal transmitted on the j+1th antenna port. For example, w j is a complex number with an amplitude of 1, w j x s j represents phase rotation of s j . For example, when n is 1, it is considered that a signal transmitted on one antenna port forms one beam. For example, when n is greater than 1, it is considered that a wide beam formed by multiple antenna ports forms a narrow beam through weighting.

[0096] Since the base station can use the same beam to transmit the PDSCH and the DMRS of the PDSCH, that is, the base station transmits the PDSCH and the DMRS of the PDSCH by using the same antenna port, the UE does not need to know how the base station side forms the transmission beam by using the signals transmitted on the antenna port. The target of the UE is to correctly receive the PDSCH, and therefore, as described above, the UE can estimate the channel of each antenna port of the DMRS of the PDSCH and demodulate and decode the PDSCH by using the channel estimation result.

[0097] In the embodiments of the present application, when multiple beams are used to transmit the PDSCH, in order to distinguish different beams, the names of the PDSCHs transmitted on different beams are distinguished. When multiple PDSCHs on different beams carry repeated data, the multiple PDSCHs can also be referred to as repeated PDSCHs.

[0098] Based on the above description, Figure 1 The method shown can also be described as: the base station transmits N repeated data to the UE by using N beams. The i-th repeated data in the N repeated data is carried by the i-th beam in the N beams on the i-th resource through the i-th downlink channel. The value of i is 1 to N, and N is an integer greater than or equal to 2. That is, the i-th beam corresponds to the i-th antenna port set. The i-th antenna port set includes one or more antenna ports. The number of antenna ports included in different antenna port sets can be the same or different, and the embodiments of the present application do not limit this.

[0099] Optionally, the antenna ports included in the i-th antenna port set can be predefined or indicated to the UE by the base station through signaling, such as first indication information or other signaling. For example, the base station indicates the antenna ports of the DMRS of the i-th PDSCH to the UE through signaling, such as RRC signaling, MAC CE or DCI. For example, the DCI can be a DCI used to schedule the i-th PDSCH, that is, the DCI carries the transmission parameters of the i-th PDSCH. After the UE receives the signaling, the UE determines the antenna ports of the DMRS of the i-th PDSCH, and determines that the antenna ports of the i-th PDSCH are the same as the antenna ports of the DMRS of the i-th PDSCH, that is, determines that the antenna ports of the i-th PDSCH are the antenna ports of the DMRS of the i-th PDSCH. In the embodiments of the present application, when the i-th PDSCH and the DMRS of the i-th PDSCH are transmitted, the i-th PDSCH and the DMRS of the i-th PDSCH are mapped to the time-frequency resources of the same antenna port. That is, in the embodiments of the present application, the antenna ports of the i-th PDSCH and the DMRS of the i-th PDSCH are the same, and the antenna port (set) of the i-th PDSCH can also be described as the antenna port (set) of the DMRS of the i-th PDSCH.

[0100] Figure 1 In the illustrated method, the PDSCH is repeatedly transmitted by multiple beams. For example Figure 3 As illustrated, the base station repeatedly transmits downlink data to the UE through a first beam (beam 1) and a second beam (beam 2), and the UE correctly receives any one of the repeated downlink data, which can achieve correct reception of the data. Therefore, the method can increase the coverage of the network and reduce the communication interruption of the base station and the UE. For different UEs in the cell, the base station can independently set the beams or set the weighting values for forming the beams for different UEs according to one or more of the following parameters: the position of the UE, the moving speed of the UE, and the like. For example, the number of antenna port sets of different UEs can be the same or different. The number of antenna ports included in a single antenna port set of different UEs can be the same or different.

[0101] As described above, each antenna port can correspond to a same time-frequency resource grid. For an antenna port, the frequency domain resources of the time-frequency resource grid corresponding to the antenna port can be referred to as available frequency domain resources of the antenna port. Part or all of the available frequency domain resources of the antenna port can be allocated to the PDSCH of the UE for the base station to transmit the PDSCH to the UE. The time domain resources of the PDSCH can be predefined or configured for the UE by the base station through signaling, which is not limited by embodiments of the present application. The DMRS of the PDSCH can be mapped in the time-frequency resources of the PDSCH or in the time-frequency resources related to the time-frequency resources of the PDSCH (for example, in the symbols adjacent to the time-frequency resources or in the symbols adjacent to the time-frequency resources), which is transmitted by the base station to the UE. The frequency domain resources allocated to the PDSCH include one or more RBs or one or more RB groups (RBG). One RBG includes one or more RBs, for example, 4, 6, 8, or 9, and the like.

[0102] In Figure 1 In the illustrated method, transmission is performed in the granularity of beams, that is, the base station transmits the PDSCH to the UE on each antenna port in a same resource in a set of antenna ports. Figure 1 In the illustrated method, the i-th resource is set for the i-th PDSCH, and i is an integer greater than or equal to 2 and less than or equal to N, and N is an integer greater than or equal to 2. The i-th resource includes the i-th frequency domain resource. The i-th frequency domain resource can be predefined or indicated to the UE by the base station through signaling, for example, the first indication information. Optionally, Figure 1The first frequency domain resource to the Nth frequency domain resource in the method shown are indicated by the base station to the UE through the first indication information. Optionally, the ith resource includes an ith time domain resource. The ith time domain resource can be predefined or indicated by the base station to the UE through signaling, for example, the first indication information. Optionally, Figure 1 The first time domain resource to the Nth time domain resource in the method shown are indicated by the base station to the UE through the first indication information.

[0103] In the embodiments of the present application, the type of the signaling, message, or (indication) information sent by the base station to the UE can be a broadcast message, a system information block (SIB), radio resource control (RRC) signaling, a media access control (MAC) control element (CE), or downlink control information (DCI), and the embodiments of the present application do not make any limitation. Exemplarily, the type of the first indication information is RRC, MAC CE, or DCI. For example, the first indication information is DCI used for scheduling the first PDSCH to the Nth PDSCH, and the DCI carries transmission parameters of the first PDSCH to the Nth PDSCH.

[0104] Figure 1 The method shown can improve the robustness of data transmission under the condition of low resource utilization. If the N frequency domain resources in the method are not independently configured but are configured as one same frequency domain resource, in order to avoid channel fading in one frequency domain range causing a large amount of distortion of the transmitted data, it can be necessary to configure the same frequency domain resource as a relatively wide frequency domain resource to increase the robustness of the transmitted data by using frequency diversity gain. At this time, resource waste can be caused. However, Figure 1 The method shown can configure the equivalent bandwidth of the N frequency domain resources combined to be relatively large by independently configuring each frequency domain resource in the N frequency domain resources, without the bandwidth of each frequency domain resource being relatively large. Therefore, the method can improve the robustness of data transmission by using frequency diversity gain, and since the bandwidth of each frequency domain resource does not have to be too large, the UE will not be caused to bear too heavy a receiving processing burden. For example, for a REDCAP terminal with weak processing capability, the method can relieve the receiving processing pressure of the terminal and reduce the power consumption of the terminal, and thus the cost of the terminal can be reduced.

[0105] It can be understood that, Figure 1The illustrated method mainly emphasizes independent configuration of each frequency domain resource, so that less resources can be used in the system to improve the robustness of data transmission, instead of emphasizing the configuration result of the frequency domain resources. For example, when the base station communicates with multiple UEs in a cell, the base station can configure N frequency domain resources of some UEs to be the same, and configure N frequency domain resources of some UEs to be different. The configuration can be determined based on at least one of the traffic amount in the cell, the processing capability of each UE, and the scheduling priority, etc.

[0106] In a communication system, a receiving end can use a reference signal for channel estimation, for demodulating a data channel or obtaining channel state information. The reference signal can also be referred to as a pilot. For example, as described above, a UE can use the DMRS of a PDSCH for channel estimation, for demodulating and decoding the PDSCH. The sequence value of the reference signal is predefined and known to both the transmitting end and the receiving end. Then, the receiving end can estimate the channel experienced by the reference signal according to the received value of the reference signal and the transmitted value of the reference signal, i.e., can perform channel estimation. When the receiving end uses the reference signal for channel estimation, the receiving end can estimate a large-scale parameter of the channel, such as one or more of a delay spread, an average delay, a doppler spread, a doppler shift, and a spatial reception parameter, and use the estimated large-scale parameter for channel estimation. The spatial reception parameter can be used for multiple-input multiple-output (MIMO) transmission, and can include one or more of an angle of arrival (AOA), an average AOA, an AOA spread, an angle of departure (AOD), an average AOD, an AOD spread, a receive antenna spatial correlation parameter, a transmit antenna spatial correlation parameter, a transmit beam, a receive beam, and a resource identity.

[0107] In a possible implementation, to speed up the channel estimation process of the reference signal A, the reference signal A and another signal B can be configured to be quasi co-located (QCL). That is, the large-scale parameters of the channel used for transmitting the reference signal A and the channel used for transmitting the signal B are approximately the same. Therefore, if the receiving end estimates the large-scale parameter experienced by the signal B in its channel, the large-scale parameter can be used to estimate the channel of the reference signal A.

[0108] In the following, the implementation will be described based on Figure 1The method shown introduces a method of configuring QCL information of a DMRS of an i-th PDSCH, where i is an integer from 1 to N, and N is an integer greater than or equal to 2. For ease of description, the DMRS of the i-th PDSCH can be referred to as the i-th DMRS. The QCL information of the i-th DMRS can also be referred to as the QCL information of the i-th antenna port set. One or more antenna ports included in the i-th antenna port set are the same as the antenna port of the i-th DMRS, that is, the i-th DMRS is also transmitted through the one or more antenna ports included in the i-th antenna port set. The i-th DMRS and the i-th PDSCH are both mapped to time-frequency resources corresponding to the one or more antenna ports included in the i-th antenna port set. Optionally, the QCL information of the i-th DMRS can also be referred to as i-th QCL information, or QCL information of the i-th frequency domain resource, and the like, which is not limited in the embodiments of the present application.

[0109] Figure 1 In the method shown, since the PDSCH frequency domain resources corresponding to each antenna port set are independently configured, in order to match the channel conditions on each PDSCH frequency domain resource, the QCL information of the DMRS of the PDSCH corresponding to each antenna port set can be independently configured to more accurately obtain the channel estimation of each PDSCH, thereby improving the accuracy of demodulation and decoding of the PDSCH at the UE side.

[0110] For i from 1 to N, the base station can indicate the QCL information of the 1st DMRS to the Nth DMRS to the UE through one same signaling; or the base station can indicate the QCL information of the 1st DMRS to the Nth DMRS to the UE through multiple signaling (for example, N signaling), where each signaling indicates the QCL information of one or more DMRS, which is not limited in the embodiments of the present application.

[0111] In a possible implementation, the base station sends second indication information to the UE, for indicating the QCL information of the i-th DMRS, where i is an integer from 1 to N, and N is an integer greater than or equal to 2.

[0112] In the embodiments of the present application, the base station can indicate the QCL information of the DMRS of the PDSCH transmitted on one antenna port or one antenna port set to the UE through the method described in any one of the following examples A to F. In the embodiments of the present application, one antenna port set can also be described as one antenna port set. In the embodiments of the present application, when the i-th antenna port set includes one antenna port, the i-th antenna port set can also be referred to as the i-th antenna port.

[0113] Example A:

[0114] For the i-th DMRS, the base station may indicate to the UE a signal (denoted as signal A) that is QCL with the i-th DMRS. Furthermore, the QCL type of the i-th DMRS and signal A may be predefined, or the base station may indicate to the UE the QCL type of the i-th DMRS and signal A through signaling. Optionally, the signaling may be second indication information or other signaling, which is not limited in the embodiment of the present application. Among them, signal A may be one signal or multiple signals, which is not limited in the embodiment of the present application.

[0115] Optionally, in Example A, the second indication information may be a system message, an RRC message, a MAC CE, or a DCI.

[0116] In an embodiment of the present application, the signal that is QCL with another signal can be a downlink reference signal or a downlink channel, for example, it can be one or more of the following signals: synchronization signal (SS), primary synchronization signal (PSS), secondary synchronization signal (SSS), physical broadcast channel (PBCH), synchronization signal block (SSB), DMRS of PBCH, DMRS of PDCCH, DMRS of PDSCH, channel state information reference signal (CSI-RS), and tracking reference signal (TRS). Among them, the PDCCH can be the PDCCH used to schedule the PDSCH, or it can be other PDCCHs, which is not limited in the embodiment of the present application. SSB includes PSS, SSS and PBCH.

[0117] In the embodiments of the present application, the QCL type is used to indicate the type of quasi-co-located large-scale parameters between signals (e.g., between signal B and signal C). For example, the type can be one or more of the following types A to D.

[0118] Type A (QCL_A): denoted as {Doppler shift, Doppler spread, delay spread, average delay}. It indicates that the Doppler shift, Doppler spread, delay spread, and average delay experienced by signal B and signal C have a correlation. Then, the receiving end can utilize the Doppler shift, Doppler spread, delay spread, and average delay experienced by signal B to perform channel estimation on the channel experienced by signal C; or, the receiving end can utilize the Doppler shift, Doppler spread, delay spread, and average delay experienced by signal C to perform channel estimation on the channel experienced by signal B. That is, it is considered that the Doppler shift, Doppler spread, delay spread, and average delay experienced by signal B are approximately the same as the Doppler shift, Doppler spread, delay spread, and average delay experienced by signal C, respectively.

[0119] Type B (QCL_B): denoted as {Doppler shift, Doppler spread}. It indicates that the Doppler shift and Doppler spread experienced by signal B and signal C have a correlation. Then, the receiving end can utilize the Doppler shift and Doppler spread experienced by signal B to perform channel estimation on the channel experienced by signal C; or, the receiving end can utilize the Doppler shift and Doppler spread experienced by signal C to perform channel estimation on the channel experienced by signal B. That is, it is considered that the Doppler shift and Doppler spread experienced by signal B are approximately the same as the Doppler shift and Doppler spread experienced by signal C, respectively.

[0120] Type C (QCL_C): denoted as {delay spread, average delay}. It indicates that the delay spread and average delay experienced by signal B and signal C have a correlation. Then, the receiving end can utilize the delay spread and average delay experienced by signal B to perform channel estimation on the channel experienced by signal C; or, the receiving end can utilize the delay spread and average delay experienced by signal C to perform channel estimation on the channel experienced by signal B. That is, it is considered that the delay spread and average delay experienced by signal B are approximately the same as the delay spread and average delay experienced by signal C, respectively.

[0121] Type D (QCL_D): denoted as {spatial receive parameter}. It indicates that the spatial receive parameter experienced by signal B and signal C have a correlation. Then, the receiving end can utilize the spatial receive parameter experienced by signal B to perform channel estimation on the channel experienced by signal C; or, the receiving end can utilize the spatial receive parameter experienced by signal C to perform channel estimation on the channel experienced by signal B.

[0122] The above-mentioned types A to D are used for example, and embodiments of the present application can further include other QCL types. That is, it is considered that the spatial receive parameter experienced by signal B is approximately the same as the spatial receive parameter experienced by signal C.

[0123] For the i-th DMRS, the base station can configure the UE with one or more signals that the i-th DMRS is QCL with.

[0124] For example, for the i-th DMRS, the base station can configure, through the second indication information, the QCL information of the UE as: SSB|QCL_A. It means that the Doppler shift, Doppler spread, delay spread, and average delay of the i-th DMRS and the SSB have a correlation. For another example, for the i-th DMRS, the base station can configure, through the second indication information, the QCL information of the UE as: SSB|QCL_B and TRS|QCL_D. It means that the Doppler shift and Doppler spread of the i-th DMRS and the SSB have a correlation, and the spatial receiving parameters of the i-th DMRS and the TRS have a correlation.

[0125] Example B:

[0126] For the i-th DMRS, the base station can indicate, for the UE, the QCL information of the i-th DMRS from M1 sets of candidate QCL information, and the QCL information of the i-th DMRS is M2 sets of QCL information in the M1 sets of candidate QCL information, where M1 is an integer greater than or equal to 1, and M2 is an integer greater than or equal to 1 and less than or equal to M1. For any set of QCL information in the M1 sets of candidate QCL information, the set of QCL information indicates a kind of signal. The QCL type corresponding to the kind of signal can be preconfigured, or the set of QCL information indicates the QCL type corresponding to the kind of signal.

[0127] For any set of QCL information in the M2 sets of QCL information, the signal indicated by the set of QCL information and the i-th DMRS are QCLed. For example, the corresponding QCL type is the QCL type indicated by the set of QCL information.

[0128] Optionally, each set of QCL information in the M1 sets of candidate QCL information uniquely corresponds to an index, and the M1 sets of candidate QCL information correspond to M1 indexes in total. The base station indicates, for the UE, M2 indexes in the M1 indexes through the second indication information, and the M2 sets of QCL information corresponding to the M2 indexes are the QCL information of the i-th DMRS. Optionally, the length of the bit information used to indicate any one of the M2 indexes is , where represents the ceiling.

[0129] Exemplarily, Table 1 shows 6 sets of candidate QCL information. It can be understood that the QCL information shown in Table 1 is only an example and does not constitute a limitation on the embodiments of the present application.

[0130] Table 1 Candidate QCL information

[0131] Index (decimal / binary) Signal QCL Type 0 / 000 SSB QCL_A 1 / 001 SSB QCL_D 2 / 010 CSI-RS QCL_B 3 / 011 CSI-RS QCL_C 4 / 100 CSI-RS QCL_D 5 / 101 TRS QCL_D

[0132] Based on Table 1, for example, for the i-th DMRS, the base station can indicate 2 indexes through the second indication information, so as to configure the QCL information of the i-th DMRS for the UE. For example, the decimal values of the 2 indexes are 0 and 4 respectively, or the binary values of the 2 indexes are 000 and 100 respectively. After receiving the second information, the UE can determine that the Doppler shift, Doppler spread, delay spread, and average delay of the i-th DMRS and the SSB have a correlation, and the spatial receiving parameters of the i-th DMRS and the CSI-RS have a correlation. Then, the UE can perform channel estimation on the i-th DMRS by using the Doppler shift, Doppler spread, delay spread, and average delay estimated according to the SSB, and can use the spatial receiving parameters estimated according to the CSI-RS, and can demodulate and decode the i-th PDSCH by using the channel estimation result.

[0133] Optionally, the base station indicates M2 sets of QCL information in M1 sets of candidate QCL information for the UE through M1 elements, and the M2 sets of QCL information are the QCL information of the i-th DMRS. The M1 elements correspond to the M1 sets of candidate QCL information one by one. For any one of the M1 elements, when the value of the element is t1, the QCL information of the i-th DMRS includes the set of QCL information corresponding to the element, and when the value of the element is not t1 or t2, the QCL information of the i-th DMRS does not include the set of QCL information corresponding to the element. Wherein, t1 and t2 are integers, for example, t1 is 1 and t2 is 0. Wherein, the M1 elements can be a bitmap including M1 bits, M1 information elements, or M1 information, and the embodiments of the present application are not limited.

[0134] Based on Table 1, for example, for the i-th DMRS, the base station can indicate 2 indexes through the second indication information, so as to configure the QCL information of the i-th DMRS for the UE. For example, the decimal values of the 2 indexes are 0 and 4 respectively, or the binary values of the 2 indexes are 000 and 100 respectively. After receiving the second information, the UE can determine that the Doppler shift, Doppler spread, delay spread, and average delay of the i-th DMRS and the SSB have a correlation, and the spatial receiving parameters of the i-th DMRS and the CSI-RS have a correlation. Then, the UE can perform channel estimation on the i-th DMRS by using the Doppler shift, Doppler spread, delay spread, and average delay estimated according to the SSB, and can use the spatial receiving parameters estimated according to the CSI-RS, and can demodulate and decode the i-th PDSCH by using the channel estimation result.

[0135] Optionally, the M1 sets of candidate QCL information can be predefined, or can be indicated by the base station for the UE through the third indication information (such as broadcast message, SIB, RRC signaling or MAC CE). The second indication information can be RRC signaling, MAC CE, or DCI.

[0136] For example, the M1 set of candidate QCL information is predefined, and the second indication information is RRC signaling, MAC CE, or DCI.

[0137] For example, the third indication information is a broadcast message or SIB, and the second indication information is RRC signaling, MAC CE, or DCI.

[0138] For example, the third indication information is RRC signaling, and the second indication information is MAC CE or DCI.

[0139] For example, the third indication information is MAC CE, and the second indication information is DCI.

[0140] In an embodiment of the present application, optionally, the second indication information and the first indication information are the same DCI.

[0141] When the base station indicates the M1 set of candidate QCL information to the UE through the third indication information, the base station can directly indicate the specific configuration of the M1 set of candidate QCL information, or can indicate the activated M1 set of candidate QCL information from the M3 set of candidate QCL information. The M3 set of candidate QCL information can be predefined, or can be indicated to the UE by the base station through the fourth indication information (such as a broadcast message, SIB, RRC signaling, or MAC CE).

[0142] For example, the M3 set of candidate QCL information is predefined, and the third indication information is a broadcast message, SIB, RRC signaling, or MAC CE.

[0143] For example, the fourth indication information is a broadcast message or SIB, and the third indication information is RRC signaling.

[0144] For example, the fourth indication information is a broadcast message, SIB, or RRC signaling, and the third indication information is MAC CE.

[0145] The method of indicating the activated M1 set of candidate QCL information from the M3 set of candidate QCL information by the base station through the fourth indication information is similar to the method of indicating the M2 set of QCL information from the M1 set of candidate QCL information described above, and will not be described here.

[0146] Example C:

[0147] For the i-th DMRS, the base station may indicate the TCI-state of the i-th DMRS to the UE from S1 candidate transmission configuration index (TCI)-states. The TCI-state of the i-th DMRS is one of the S1 candidate TCI-states, and S1 is an integer greater than or equal to 1. For any TCI-state among the S1 candidate TCI-states, the TCI-state indicates at least one signal and a QCL type corresponding to each of the at least one signal. For a TCI-state indicated by the base station to the UE, the i-th DMRS and at least one signal indicated by the TCI-state are QCL, and the corresponding QCL type is the QCL type indicated by the TCI-state.

[0148] Optionally, the above method of indicating one TCI-state from S1 candidate TCI-states is similar: when M2 is equal to 1, the above method of indicating M2 sets of QCL information from M1 sets of candidate QCL information is not repeated here.

[0149] For example, three candidate TCI-states are shown in Table 2. It should be understood that the TCI-states shown in Table 2 are merely examples and do not constitute a limitation to the embodiments of the present application.

[0150] Table 2 Candidate TCI-state

[0151] Index (decimal / binary) Signal1|QCL Type1 Signal2|QCL Type2 0 / 00 TRS|QCL_A / 1 / 01 CSI-RS|QCL_D / 2 / 10 TRS|QCL_A CSI-RS|QCL_D

[0152] Based on Table 2, for example, for the i-th DMRS, the base station can use the second indication information bits, indicating the TCI-state of the i-th DMRS for the UE. For example, the binary value of these two bits is 10. After receiving the second information, the UE can determine that the Doppler shift, Doppler spread, delay spread, and average delay of the i-th DMRS and TRS are correlated, and are correlated with the spatial reception parameters of the CSI-RS. For example, the binary value of these two bits is 00. After receiving the second information, the UE can determine that the Doppler shift, Doppler spread, delay spread, and average delay of the i-th DMRS and TRS are correlated.

[0153] Optionally, the information of the S1 candidate TCI-states may be predefined, or may be indicated by the base station to the UE via third indication information (such as a broadcast message, SIB, RRC signaling, or MAC CE). The second indication information may be RRC signaling, MAC CE, or DCI.

[0154] For example, the S1 candidate TCI-states are predefined, and the second indication information is RRC signaling, MAC CE, or DCI.

[0155] For example, the third indication information is a broadcast message or SIB, and the second indication information is RRC signaling, MAC CE, or DCI.

[0156] For example, the third indication information is RRC signaling, and the second indication information is MAC CE or DCI.

[0157] For example, the third indication information is MAC CE, and the second indication information is DCI.

[0158] In an embodiment of the present application, the second indication information includes a TCI field for the base station to indicate a TCI-state to the UE.

[0159] In an embodiment of the present application, the second indication information and the first indication information are the same DCI.

[0160] The base station indicates the S1 candidate TCI-states to the UE through the third indication information, which can directly indicate the specific configurations of the S1 candidate TCI-states, or can indicate the activated S1 candidate TCI-states from S2 candidate TCI-states. The S2 candidate TCI-states can be predefined, or indicated by the base station to the UE through the fourth indication information (such as a broadcast message, SIB, RRC signaling, or MAC CE).

[0161] For example, the S2 candidate TCI-states are predefined, and the third indication information is a broadcast message, SIB, RRC signaling, or MAC CE.

[0162] For example, the fourth indication information is a broadcast message or SIB, and the third indication information is RRC signaling.

[0163] For example, the fourth indication information is a broadcast message, SIB, or RRC signaling, and the third indication information is MAC CE.

[0164] The method of the base station indicating the activated S1 candidate TCI-states from S2 candidate TCI-states through the fourth indication information is similar to the method of indicating M2 sets of QCL information from M1 sets of candidate QCL information described above, which will not be repeated here.

[0165] Example D:

[0166] In a possible implementation, the base station indicates one first pattern for the UE from F first candidate patterns, and the one first pattern indicates TCI-states of sub-frequency domain resources of each frequency domain resource from the 1st frequency domain resource to the Nth frequency domain resource. The first pattern indicates a total of TCI-states. Wherein, r i is the number of sub-frequency domain resources included in the ith frequency domain resource. The r i of different frequency domain resources can be the same or different. i r is an integer greater than or equal to 1, i is 1 to N, and N is an integer greater than or equal to 2. Optionally, the r i of at least one frequency domain resource is an integer greater than or equal to 2.

[0167] In the embodiments of the present application, the r i of different sub-frequency domain resources in the r sub-frequency domain resources of the ith frequency domain resource can be the same or different, which is not limited in the embodiments of the present application. Wherein, the size of the sub-frequency domain resource can be the number of subcarriers, the number of RBs, or the number of RBGs included in the sub-frequency domain resource, or the bandwidth of the sub-frequency domain resource, etc. i The value of r can be predefined, or can be indicated by the base station to the UE through signaling. The size of the r i sub-frequency domain resources, or the proportional size of each sub-frequency domain resource in the r i sub-frequency domain resources in the frequency domain resource is predefined, or is indicated by the base station to the UE through signaling.

[0168] For example, the bandwidth of the ith frequency domain resource is U i RBs, the size of the r i sub-frequency domain resources of the ith frequency domain resource is the same, and each sub-frequency domain resource includes RBs. If U i cannot be divided by r i , the remaining U RBs in the ith frequency domain resource are not used for mapping the ith PDSCH, that is, the ith PDSCH is mapped on the U i RBs where the r sub-frequency domain resources are located. Wherein, represents the floor function.

[0169] Similar to the example C above, the TCI-state of the jth sub-band resource of the ith frequency domain resource indicates at least one signal and a QCL type corresponding to each of the at least one signal. For a first pattern indicated by the base station to the UE, the TCI-state of the jth sub-band resource of the ith frequency domain resource indicated by the first pattern indicates at least one signal QCLed with a DMRS of a PDSCH transmitted on the jth sub-band resource, and indicates a QCL type of the DMRS and each of the at least one signal. Wherein, j is valued from 1 to r i In the embodiments of the present application, the DMRS of the PDSCH transmitted on the jth sub-band resource has one or more of the following characteristics: transmitted in the jth sub-band resource, transmitted in the bandwidth corresponding to the jth sub-band resource, and used for demodulating and decoding the PDSCH transmitted on the jth sub-band resource, etc.

[0170] Optionally, the method of indicating a first pattern from F1 candidate first patterns is similar to the above method of indicating M2 sets of QCL information from M1 sets of candidate QCL information when M2 is equal to 1, which will not be repeated here.

[0171] Exemplarily, assuming N is 2, each frequency domain resource includes 2 sub-band resources, and Table 3 shows 4 candidate first patterns. It can be understood that the first patterns shown in Table 3 are only examples and do not constitute a limitation on the embodiments of the present application. It is assumed that the TCI-state indicated in Table 3 is the TCI-state shown in Table 2. Figure 4 The corresponding candidate first pattern example diagram of Table 3 is shown.

[0172] Table 3 candidate first pattern

[0173]

[0174]

[0175] For example, based on Table 3, the base station can indicate the first pattern to the UE through the second indication information in the following manner: The UE is configured with a first pattern of the UE by the 2 bits. For example, the 2-bit binary value is 10. After receiving the second information, the UE can determine that the index of the TCI-state of the DMRS of the PDSCH transmitted on the 1stsub-frequency domain resource of the 1stfrequency domain resource is 0, i.e., the UE can determine that the DMRS and the TRS have correlation in Doppler shift, Doppler spread, delay spread, and average delay; can determine that the index of the TCI-state of the DMRS of the PDSCH transmitted on the 2ndsub-frequency domain resource of the 1stfrequency domain resource is 1, i.e., the UE can determine that the DMRS and the CSI-RS have correlation in spatial reception parameter; can determine that the index of the TCI-state of the DMRS of the PDSCH transmitted on the 1stsub-frequency domain resource of the 2ndfrequency domain resource is 1, i.e., the UE can determine that the DMRS and the CSI-RS have correlation in spatial reception parameter; and can determine that the index of the TCI-state of the DMRS of the PDSCH transmitted on the 2ndsub-frequency domain resource of the 2ndfrequency domain resource is 2, i.e., the UE can determine that the DMRS and the TRS have correlation in Doppler shift, Doppler spread, delay spread, and average delay, and have correlation in spatial reception parameter of the CSI-RS.

[0176] Optionally, in each of the above methods, each of the values of r i is 1, the method is equivalent to the following method.

[0177] In one possible implementation, the base station indicates one first pattern from F1 candidate first patterns, and the one first pattern indicates the TCI-state of each of the 1stDMRS to the NthDMRS. That is, the one first pattern is used to indicate N TCI-states, for example, to indicate the indexes of the N TCI-states, and the N TCI-states correspond to the 1stDMRS to the NthDMRS one by one. Similar to the example C described above, the TCI-state of the i-th DMRS indicates at least one signal that is QCL with the i-th DMRS, and indicates the QCL type of the i-th DMRS and each of the at least one signal. F1 is an integer greater than or equal to 1.

[0178] Exemplarily, assuming that N is 2, Table 4 shows four candidate first patterns. It can be understood that the first patterns shown in Table 4 are only examples and do not constitute a limitation to the embodiments of the present application. Assuming that the TCI-states indicated in Table 4 are the TCI-states shown in Table 2. Figure 5 The corresponding candidate first pattern example diagram of Table 4 is shown.

[0179] Table 4 candidate first pattern

[0180] Index (decimal / binary) Figure pattern {TCI-state of 1st frequency domain resource, TCI-state of 2nd frequency domain resource} 0 / 00 {0,1} 1 / 01 {0,2} 2 / 10 {1,2} 3 / 11 {2,1}

[0181] For example, based on Table 4, the base station can configure the first pattern of the UE by the 2 bits in the second indication information. For example, the 2-bit binary value is 10. After receiving the second information, the UE can determine that the index of the TCI-state of the 1st DMRS is 1, and can determine that the index of the TCI-state of the 2nd DMRS is 2. Then the UE can determine that the spatial receiving parameters of the 1st DMRS and the CSI-RS have correlation; can determine that the Doppler shift, the Doppler spread, the delay spread, and the average delay of the 2nd DMRS and the TRS have correlation, and the spatial receiving parameters of the CSI-RS have correlation.

[0182] Optionally, the F1 candidate first patterns can be predefined, or can be indicated by the base station to the UE through the third indication information (such as a broadcast message, a SIB, RRC signaling or a MAC CE). The second indication information can be RRC signaling, a MAC CE, or DCI. Optionally, if F1 is equal to 1, the first pattern can not be indicated by the second indication information, and at this time, the first pattern is considered to be the pattern configured by the base station to the UE.

[0183] For example, the F1 candidate first patterns are predefined, and the second indication information is RRC signaling, a MAC CE, or DCI.

[0184] For example, the third indication information is a broadcast message or a SIB, and the second indication information is RRC signaling, a MAC CE, or DCI.

[0185] For example, the third indication information is RRC signaling, and the second indication information is a MAC CE or DCI.

[0186] For example, the third indication information is a MAC CE, and the second indication information is DCI.

[0187] In the embodiments of the application, optionally, the second indication information includes a TCI field for the base station to indicate the first pattern to the UE.

[0188] In the embodiments of the application, optionally, the second indication information and the first indication information are the same DCI.

[0189] The base station indicates the F1 candidate first patterns to the UE through the third indication information, which can directly indicate the specific configurations of the F1 candidate first patterns, or can indicate the activated F1 candidate first patterns from the F2 candidate first patterns. The F2 candidate first patterns can be predefined, or can be indicated by the base station to the UE through the fourth indication information (such as a broadcast message, a SIB, RRC signaling or a MAC CE).

[0190] For example, the F2 candidate first patterns can be predefined, and the third indication information is a broadcast message, a SIB, RRC signaling or a MAC CE.

[0191] For example, the fourth indication information is a broadcast message or a SIB, and the third indication information is RRC signaling.

[0192] For example, the fourth indication information is a broadcast message, a SIB or RRC signaling, and the third indication information is a MAC CE.

[0193] The method that the base station indicates the activated F1 candidate first patterns from the F2 candidate patterns through the fourth indication information is similar to the method of indicating the M2 sets of QCL information from the M1 sets of candidate QCL information, which will not be described herein.

[0194] Example E:

[0195] In a possible implementation, the base station indicates one second pattern from P1 candidate second patterns, and the one second pattern indicates a set of time units of first patterns. The set of time units includes a plurality of time units, and each time unit corresponds to a first pattern. P1 is an integer greater than or equal to 1. In embodiments of the present application, the time unit can be a symbol, a slot, a subframe, a transmission time interval, or a radio frame. The description of the first pattern is the same as that in Example D, which will not be described herein. The set of time units includes a first time unit. The first time unit is used to transmit the PDSCH. Therefore, the UE can determine the first pattern corresponding to the first time unit in the second pattern indicated by the base station and the first time unit used to transmit the PDSCH, and determine the TCI-state of each PDSCH. Figure 1

[0196] Exemplarily, it is assumed that N is 2, the i-th frequency domain resource includes 2 sub-frequency domain resources, each second pattern is used to indicate the first patterns on 3 time units, and Table 5 shows 4 candidate second patterns. It can be understood that the second patterns shown in Table 5 are only examples and do not constitute a limitation on embodiments of the present application. It is assumed that the first patterns indicated in Table 5 are the first patterns shown in Table 3. Figure 6

[0197] Table 5 candidate second patterns

[0198]

[0199] For example, based on Table 5, the base station can indicate the first pattern corresponding to the first time unit in the second pattern through the second indication information in the second pattern. ​​The UE is configured with a second pattern by the second information. For example, the 2-bit binary value is 11. After receiving the second information, if the UE receives PDSCH on the third time unit, the UE can determine that the index of the TCI-state of the DMRS of the PDSCH transmitted on the first sub-frequency domain resource of the first frequency domain resource is 0, i.e., the UE can determine that the DMRS and the TRS have correlation in Doppler shift, Doppler spread, delay spread, and average delay; can determine that the index of the TCI-state of the DMRS of the PDSCH transmitted on the second sub-frequency domain resource of the first frequency domain resource is 1, i.e., the UE can determine that the DMRS and the CSI-RS have correlation in spatial reception parameters; can determine that the index of the TCI-state of the DMRS of the PDSCH transmitted on the first sub-frequency domain resource of the second frequency domain resource is 1, i.e., the UE can determine that the DMRS and the CSI-RS have correlation in spatial reception parameters; and can determine that the index of the TCI-state of the DMRS of the PDSCH transmitted on the second sub-frequency domain resource of the second frequency domain resource is 2, i.e., the UE can determine that the DMRS and the TRS have correlation in Doppler shift, Doppler spread, delay spread, and average delay, and have correlation in spatial reception parameters of the CSI-RS.

[0200] Optionally, the P1 candidate second patterns can be predefined or can be indicated to the UE by the base station through third indication information (such as a broadcast message, SIB, RRC signaling, or MAC CE). The second indication information can be RRC signaling, MAC CE, or DCI. Optionally, if P1 is equal to 1, one second pattern can not be indicated to the UE through the second indication information, and at this time, the one second pattern is considered to be the second pattern configured to the UE by the base station.

[0201] For example, the P1 candidate second patterns can be predefined, and the second indication information is RRC signaling, MAC CE, or DCI.

[0202] For example, the third indication information is a broadcast message or SIB, and the second indication information is RRC signaling, MAC CE, or DCI.

[0203] For example, the third indication information is RRC signaling, and the second indication information is MAC CE or DCI.

[0204] For example, the third indication information is MAC CE, and the second indication information is DCI.

[0205] In the embodiments of the present application, optionally, the second indication information includes a TCI field for the base station to indicate the second pattern to the UE.

[0206] In the embodiments of the present application, optionally, the second indication information and the first indication information are the same DCI.

[0207] The base station indicates the P1 candidate second patterns to the UE through third indication information. The base station can directly indicate the specific configuration of the P1 candidate second patterns, or can indicate the activated P1 candidate second patterns from the P2 candidate second patterns. The P2 candidate second patterns can be predefined, or indicated to the UE by the base station through fourth indication information (such as a broadcast message, SIB, RRC signaling, or MAC CE).

[0208] For example, the P2 candidate second patterns can be predefined, and the third indication information is a broadcast message, SIB, RRC signaling, or MAC CE.

[0209] For example, the fourth indication information is a broadcast message or SIB, and the third indication information is RRC signaling.

[0210] For example, the fourth indication information is a broadcast message, SIB, or RRC signaling, and the third indication information is MAC CE.

[0211] The method of indicating the activated P1 candidate second patterns from the P2 candidate second patterns by the base station through the fourth indication information is similar to the method of indicating the M2 set of QCL information from the M1 set of candidate QCL information described above, and will not be described again here.

[0212] Example F:

[0213] In one possible implementation, the base station indicates Z2 third patterns from Z1 candidate third patterns.

[0214] For any one of the Z1 candidate third patterns, the third pattern corresponds to a TCI-state, and the third pattern is used to indicate elements, and the elements correspond to sub-resources in the first frequency domain resource to the Nth frequency domain resource in sequence (for example, from high frequency to low frequency, or from low frequency to high frequency) one by one. For any one of the elements, when the value of the element is t1, it indicates that the TCI-state corresponding to the third pattern is enabled on the sub-resource corresponding to the element, and when the value of the element is not t1 or t2, it indicates that the TCI-state corresponding to the third pattern is not enabled on the sub-resource corresponding to the element. Wherein, t1 and t2 are integers, for example, t1 is 1 and t2 is 0. The elements can be a bitmap including bits, information elements, information bits, etc., which are not limited by the embodiments of the present application.

[0215] Regarding the The introduction of each sub-resource is the same as the above example D, r i is the number of sub-frequency domain resources included in the ith frequency domain resource. i Can be the same or different, i is an integer greater than or equal to 1, i ranges from 1 to N, and N is an integer greater than or equal to 2. In a special example, the r of each frequency domain resource from the 1st frequency domain resource to the Nth frequency domain resource is i Both are 1. At this time, similar to the above example D, it can be considered that there is no need to distinguish sub-frequency domain resources in the frequency domain resources.

[0216] The method of indicating Z2 third patterns from Z3 candidate third patterns is similar to the above method of indicating M2 sets of QCL information from M1 sets of candidate QCL information, and will not be repeated here.

[0217] The base station indicates Z2 third patterns that can be used by the UE through the indicated Z2 third patterns. For any third pattern among the Z2 third patterns, for example, the third pattern A, the third pattern A indicated by the UE Any element of the elements, when the value of the element is t1, it indicates that the TC-state of the DMRS of the PDSCH transmitted on the sub-resource corresponding to the element includes the TCI-state corresponding to the third pattern, when the value of the element is not t1 or t2, it indicates that the TC-state of the DMRS of the PDSCH transmitted on the sub-resource corresponding to the element does not include the TCI-state corresponding to the third pattern.

[0218] Optionally, priorities can be configured for the Z3 TCI-states corresponding to the above-mentioned Z1 candidate third patterns or the Z4 TCI-states corresponding to the Z2 third pattern. When multiple TCI-states are enabled for the same UE on the same sub-frequency domain resources, the TCI-state with a higher priority is determined to be the TC-state of the DMRS of the PDSCH of the UE transmitted on the sub-frequency domain resources. Among them, Z3 is less than or equal to Z1, and Z4 is less than or equal to Z2. The priority of each configured TCI-state can be predefined, or can be indicated by the base station to the UE through signaling, and is not limited in the embodiments of the present application.

[0219] For example, Table 6 shows four candidate third patterns. Assume that N is 2, each frequency domain resource includes four sub-frequency domain resources, and the TCI-state indicated in Table 6 is the TCI-state shown in Table 2. Figure 7 The following is an example of a candidate third pattern corresponding to Table 6.

[0220] Table 6 Candidate third pattern

[0221]

[0222] For example, based on Table 6, the base station can indicate the indexes of 2 third patterns by the second indication information, and the values of the 2 indexes are 0 and 1 respectively. After receiving the second information, the UE can determine that the indexes of the TCI-states of the DMRS of the PDSCH transmitted on the 1st to 4th sub-frequency domain resources of the 1st frequency domain resource are 1, and the indexes of the TCI-states of the DMRS of the PDSCH transmitted on the 1st to 4th sub-frequency domain resources of the 2nd frequency domain resource are 0.

[0223] For another example, based on Table 6, the base station can indicate 3 indexes by the second indication information, and the values of the 3 indexes are 0, 1 and 2 respectively. Among them, the priority of the TCI-state with index 2 is higher than the priorities of the TCI-states with indexes 0 and 1. After receiving the second information, the UE can determine that the indexes of the TCI-states of the DMRS of the PDSCH transmitted on the 1st and 2nd sub-frequency domain resources of the 1st frequency domain resource are 1, the indexes of the TCI-states of the DMRS of the PDSCH transmitted on the 3rd and 4th sub-frequency domain resources of the 1st frequency domain resource are 2, the indexes of the TCI-states of the DMRS of the PDSCH transmitted on the 1st and 2nd sub-frequency domain resources of the 2nd frequency domain resource are 0, and the indexes of the TCI-states of the DMRS of the PDSCH transmitted on the 3rd and 4th sub-frequency domain resources of the 2nd frequency domain resource are 2.

[0224] Optionally, the Z1 candidate third patterns can be predefined, or can be indicated by the base station to the UE through the third indication information (such as broadcast message, SIB, RRC signaling or MAC CE). The second indication information can be RRC signaling, MAC CE or DCI. Optionally, if Z1 is equal to 1, one third pattern can not be indicated by the second indication information, and at this time, the one third pattern is considered to be the third pattern configured by the base station to the UE.

[0225] For example, the Z1 candidate third patterns can be predefined, and the second indication information is RRC signaling, MAC CE or DCI.

[0226] For example, the third indication information is a broadcast message or SIB, and the second indication information is RRC signaling, MAC CE or DCI.

[0227] For example, the third indication information is RRC signaling, and the second indication information is MAC CE or DCI.

[0228] For example, the third indication information is MAC CE, and the second indication information is DCI.

[0229] Optionally, the second indication information includes a TCI field, used by the base station to indicate the third pattern to the UE.

[0230] Optionally, the second indication information and the first indication information are the same DCI.

[0231] The base station indicates the Z1 candidate third patterns to the UE through the third indication information, which can directly indicate the specific configurations of the Z1 candidate third patterns, or can indicate the activated Z1 candidate third patterns from the Z3 candidate third patterns. The Z3 candidate third patterns can be predefined, or indicated to the UE by the base station through the fourth indication information (such as a broadcast message, SIB, RRC signaling or MAC CE).

[0232] For example, the Z3 candidate third patterns can be predefined, and the third indication information is a broadcast message, SIB, RRC signaling or MAC CE.

[0233] For example, the fourth indication information is a broadcast message or SIB, and the third indication information is RRC signaling.

[0234] For example, the fourth indication information is a broadcast message, SIB or RRC signaling, and the third indication information is MAC CE.

[0235] The method of indicating the activated Z1 candidate first patterns from the Z3 candidate third patterns by the base station through the fourth indication information is similar to the above-mentioned method of indicating the M2 set of QCL information from the M1 set of candidate QCL information, which will not be repeated here.

[0236] Example G:

[0237] In one possible implementation, the base station indicates X2 fourth patterns from X1 candidate fourth patterns, and each fourth pattern indicates a third pattern of a group of time units. The group of time units is introduced as above in Example E, and the third pattern is introduced as described in Example F, which will not be repeated here. The first time unit is included in the group of time units. The first time unit is used to transmit Figure 1 PDSCH in the method shown. Therefore, the UE can determine the X2 third patterns corresponding to the first time unit in the X2 fourth patterns according to the X2 fourth patterns indicated by the base station and the first time unit used to transmit PDSCH, so as to determine the TCI-state of each PDSCH similar to Example F.

[0238] Exemplarily, assuming that N is 2, each frequency domain resource includes 4 sub-frequency domain resources, and each fourth pattern is used for indicating the third pattern on 3 time units, Table 7 shows 4 candidate fourth patterns. It can be understood that the fourth patterns shown in Table 7 are only examples and do not constitute a limitation to the embodiments of the present application. Assuming that the third pattern indicated in Table 7 is the third pattern shown in Table 6. Figure 8 The candidate fourth pattern corresponding to Table 7 is shown in the example diagram.

[0239] Table 7 candidate fourth pattern

[0240]

[0241]

[0242] For example, the base station can indicate the index of 2 fourth patterns for the UE through the second indication information, assuming that the indicated 2 indexes are 1 and 2, or the bitmap indicated for the UE is 0110 (assuming that from low to high, the fourth pattern 0 to the fourth pattern 3 are corresponded in turn). After receiving the second information, if the UE receives the PDSCH on the 1st time unit, the UE can determine that the index of the TCI-state of the DMRS of the PDSCH transmitted on the 1st to 4th sub-frequency domain resources of the 1st frequency domain resource is 1, and the index of the TCI-state of the DMRS of the PDSCH transmitted on the 1st to 4th sub-frequency domain resources of the 2nd frequency domain resource is 0.

[0243] Alternatively, the X1 candidate fourth patterns can be predefined, or can be indicated for the UE by the base station through the third indication information (such as a broadcast message, SIB, RRC signaling or MAC CE). The second indication information can be RRC signaling, MAC CE or DCI. Alternatively, if X1 is equal to 1, the fourth pattern can not need to be indicated through the second indication information, at this time, the one fourth pattern is considered to be the fourth pattern configured for the UE by the base station.

[0244] For example, the X1 candidate fourth patterns can be predefined, and the second indication information is RRC signaling, MAC CE or DCI.

[0245] For example, the third indication information is a broadcast message or SIB, and the second indication information is RRC signaling, MAC CE or DCI.

[0246] For example, the third indication information is RRC signaling, and the second indication information is MAC CE or DCI.

[0247] For example, the third indication information is MAC CE, and the second indication information is DCI.

[0248] Optionally, the second indication information includes a TCI field, used by the base station to indicate the fourth pattern to the UE.

[0249] Optionally, the second indication information and the first indication information are the same DCI.

[0250] The base station indicates the X1 candidate fourth patterns to the UE through the third indication information, which can directly indicate the specific configurations of the X1 candidate fourth patterns, or can indicate the activated X1 candidate fourth patterns from the X3 candidate fourth patterns. The X3 candidate fourth patterns can be predefined, or indicated to the UE by the base station through fourth indication information (such as a broadcast message, SIB, RRC signaling, or MAC CE).

[0251] For example, the X3 candidate fourth patterns can be predefined, and the third indication information is a broadcast message, SIB, RRC signaling, or MAC CE.

[0252] For example, the fourth indication information is a broadcast message or SIB, and the third indication information is RRC signaling.

[0253] For example, the fourth indication information is a broadcast message, SIB, or RRC signaling, and the third indication information is a MAC CE.

[0254] The method of indicating the activated X1 candidate fourth patterns from the X3 candidate fourth patterns by the base station through the fourth indication information is similar to the method of indicating the M2 set of QCL information from the M1 set of candidate QCL information described above, which will not be repeated here.

[0255] Based on the above-described method, Figure 9 FIG. 1 shows an example of a flow diagram of data transmission between a base station and a UE.

[0256] S901, the base station sends a downlink signal to the UE. For example, the base station sends an SSB and / or a CSI-RS.

[0257] S902, the UE performs channel estimation or channel measurement on the downlink signal received in S901, and feeds back the measurement result to the base station.

[0258] S903, the UE sends a sounding reference symbol (SRS) to the base station.

[0259] S904, the base station determines a plurality of beams used to send a PDSCH to the UE, frequency domain resources corresponding to the plurality of beams, a set of antenna ports, and QCL information according to the measurement information reported by the UE in S902 and / or channel measurement information obtained according to the SRS received in S403.

[0260] S905, the base station transmits the PDCCH and the PDSCH to the UE.

[0261] The DCI carried on the PDCCH is used to realize the functions of the first indication information and the second indication information. For example, the DCI can indicate the following information of the 1st PDSCH to the Nth PDSCH: the 1st frequency domain resource to the Nth frequency domain resource, the 1st antenna port set to the Nth antenna port set, and the QCL information of the DMRS of the 1st PDSCH to the Nth PDSCH.

[0262] The UE receives the PDSCH according to the indication of the DCI carried on the PDCCH.

[0263] The UE determines the following information of the 1st PDSCH to the Nth PDSCH according to the indication of the DCI: the 1st frequency domain resource to the Nth frequency domain resource, the 1st antenna port set to the Nth antenna port set, and the QCL information of the DMRS of the 1st PDSCH to the Nth PDSCH, which carries the N times of repeated data. According to the information, the UE can receive the 1st PDSCH to the Nth PDSCH. As long as the data is successfully received from at least one of the 1st PDSCH to the Nth PDSCH, the successful data transmission of the base station and the UE can be realized.

[0264] In the embodiments of the present application, the method provided by the embodiments of the present application is introduced from the perspective of the network device (such as a base station), the terminal device (such as a UE), and the interaction between the network device and the terminal device. In order to realize the functions in the method provided by the embodiments of the present application, the network device and the terminal device can include hardware structures and / or software modules to realize the above-mentioned functions in the form of hardware structures, software modules, or hardware structures plus software modules. Whether a certain function in the above-mentioned functions is executed in the form of hardware structure, software module, or hardware structure plus software module depends on the specific application of the technical solution and the design constraint conditions.

[0265] Figure 10 The structure example diagram of the apparatus 300 provided by the embodiments of the present application is shown.

[0266] In a possible implementation, the apparatus 300 is used to realize the functions of the terminal device in the above-mentioned method. The apparatus can be a terminal device, or other apparatus capable of realizing the functions of the terminal device. The other apparatus can be installed in the terminal device or can be used in matching with the terminal device.

[0267] The apparatus 300 includes a receiving module 301 for receiving signals or information. For example, the receiving module 301 is used to receive one or more of the following signals from the network device: the first indication information, the second indication information, the PDSCH, and the DMRS of the PDSCH.

[0268] The apparatus 300 includes a sending module 302 configured to send signals or information. For example, the sending module 302 is configured to send SRS to a network device.

[0269] The apparatus 300 includes a processing module 303 configured to process received signals or information. For example, the processing module 303 is configured to decode signals or information received by the receiving module 301. The processing module 303 can also generate signals or information to be sent, for example, signals or information to be sent by the sending module 302.

[0270] The division of modules in the embodiments of the present application is illustrative, and is a logical function division. In actual implementation, another division manner can be used. For example, the receiving module 301 and the sending module 302 can be integrated into a transceiving module or a communication module. In addition, each function module in each embodiment of the present application can be integrated in one module, or can be a single physical existence, or two or more modules can be integrated in one module. The integrated module can be implemented in the form of hardware or in the form of a software function module.

[0271] In a possible implementation, the apparatus 300 is configured to implement the functions of a network device in the above method. The apparatus can be a network device, or can be another apparatus capable of implementing the functions of a network device. The other apparatus can be installed in the network device or can be used in matching with the network device.

[0272] The apparatus 300 includes a receiving module 301 configured to receive signals or information. For example, the receiving module 301 is configured to receive SRS from a terminal device.

[0273] The apparatus 300 includes a sending module 302 configured to send signals or information. For example, the sending module 302 is configured to send one or more of the following signals to a terminal device: first indication information, second indication information, a PDSCH, and a DMRS of the PDSCH.

[0274] The apparatus 300 includes a processing module 303 configured to process received signals or information. For example, the processing module 303 is configured to decode signals or information received by the receiving module 301. The processing module 303 can also generate signals or information to be sent, for example, signals or information to be sent by the sending module 302.

[0275] As shown in FIG. 4, the apparatus 400 includes a receiving module 401, a processing module 403, and a sending module 402. Figure 11 The apparatus 400 provided by the embodiments of the present application is shown in FIG. 4.

[0276] In a possible implementation, the apparatus 400 is configured to implement the functions of the terminal device in the above method. The apparatus 400 can be a terminal device or another apparatus capable of implementing the functions of the terminal device. The apparatus can be installed in the terminal device or can be used in combination with the terminal device. For example, the apparatus 400 can be a chip system. In embodiments of the present application, the chip system can be composed of a chip or can include a chip and other discrete devices. The apparatus 400 includes at least one processor 420 configured to implement the functions of the terminal device in the method provided in the embodiments of the present application. For example, the processor 420 can generate and send a signal such as an SRS. The processor 420 can be configured to receive and process one or more of the following signals: the first indication information, the second indication information, the PDSCH, and the DMRS of the PDSCH. For details, refer to the detailed description in the method examples, which will not be repeated here.

[0277] The apparatus 400 can further include at least one memory 430 configured to store program instructions and / or data. The memory 430 is coupled to the processor 420. The coupling between the apparatuses, units, or modules in the embodiments of the present application is indirect coupling or communication connection between the apparatuses, units, or modules, which can be electrical, mechanical, or other forms, for information interaction between the apparatuses, units, or modules. The processor 420 can operate in cooperation with the memory 430. The processor 420 can execute the program instructions stored in the memory 430. At least one of the at least one memory can be included in the processor 420.

[0278] The apparatus 400 can further include a communication interface 410 configured to communicate with other devices through a transmission medium, so that the apparatuses in the apparatus 400 can communicate with other devices. For example, the other devices can be network devices. The processor 420 transmits and receives signals through the communication interface 410 and is configured to implement the functions of the terminal device described in the above method embodiments.

[0279] In a possible implementation, the apparatus 400 is configured to implement the functions of the network device in the above method. The apparatus 400 can be a network device or another apparatus capable of implementing the functions of the network device. The apparatus can be installed in the network device or can be used in combination with the network device. For example, the apparatus 400 can be a chip system. The apparatus 400 includes at least one processor 420 configured to implement the functions of the network device in the method provided in the embodiments of the present application. For example, the processor 420 can receive and process a signal such as an SRS. The processor 420 can be configured to generate and send one or more of the following signals: the first indication information, the second indication information, the PDSCH, and the DMRS of the PDSCH. For details, refer to the detailed description in the method examples, which will not be repeated here.

[0280] Device 400 may also include at least one memory 430 for storing program instructions and / or data. Memory 430 is coupled to processor 420. Processor 420 may operate in conjunction with memory 430. Processor 420 may execute program instructions stored in memory 430. At least one of the at least one memory may be included in processor 420.

[0281] Apparatus 400 may also include a communication interface 410 for communicating with other devices via a transmission medium, thereby enabling the apparatus in apparatus 400 to communicate with the other devices. For example, the other device may be a terminal device. Processor 420 utilizes communication interface 410 to send and receive signals and implement the network device functions described in the above method embodiments.

[0282] The specific connection medium between the communication interface 410, the processor 420 and the memory 430 is not limited in the embodiment of the present application. Figure 11 The memory 430, the processor 420 and the transceiver 410 are connected via a bus 440. Figure 11 The connections between the other components are shown in bold lines, which are only for illustration and are not intended to be limiting. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, Figure 11 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0283] In the embodiments of the present application, the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present application may be directly implemented as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0284] In the embodiments of the present application, the memory can be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), and can also be a volatile memory, such as a random-access memory (RAM). The memory can be any other medium capable of carrying or storing desired program codes in the form of instructions or data structures and capable of being accessed by a computer, but is not limited to this. The memory in the embodiments of the present application can also be a circuit or any other device capable of realizing a storage function, for storing program instructions and / or data.

[0285] The technical solutions provided by the embodiments of the present application can be realized by software, hardware, firmware or any combination thereof, in whole or in part. When realized by software, the computer program product can be realized in whole or in part. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the flow or function described in the embodiments of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a terminal device or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through a wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) manner. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media. The available medium can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a digital video disc (DVD)), or a semiconductor medium, etc.

[0286] In the embodiments of the present application, the methods and / or terms between the method embodiments can be mutually referenced without logical contradiction, for example, the functions and / or terms between the device embodiments can be mutually referenced, and for example, the functions and / or terms between the device embodiments and the method embodiments can be mutually referenced.

[0287] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for repeated data transmission, characterized in that: include: receiving first indication information from a network device, where the first indication information is used to indicate an i-th frequency domain resource of an i-th downlink shared data channel PDSCH and an i-th antenna port set of a demodulation reference signal DMRS of the i-th PDSCH, where the i-th antenna port set includes one or more antenna ports; Receiving, using the i-th antenna port set, the i-th PDSCH from the network device on the i-th frequency domain resource, where the i-th PDSCH carries i-th repeated data; The value of i ranges from 1 to N, and N is an integer greater than or equal to 2.

2. The method according to claim 1, characterized in that The method further includes: receiving second indication information from the network device; wherein, The second indication information is used to indicate QCL information of the DMRS of the i-th PDSCH.

3. The method according to claim 2, characterized in that The second indication information is used to indicate QCL information of the DMRS of the i-th PDSCH, including: The second indication information is used to indicate a transmission configuration number-state TCI-state, and the one TCI-state is included in S1 TCI-states. Each TCI-state in the S1 TCI-states is used to indicate at least one signal and the QCL type corresponding to each signal in the at least one signal. The at least one signal indicated by the indicated TCI-state and the DMRS of the i-th PDSCH are QCL.

4. The method according to claim 2, characterized in that The second indication information is used to indicate QCL information of the DMRS of the i-th PDSCH, including: The second indication information is used to indicate a first pattern, the first pattern is included in F1 candidate first patterns, and each first pattern in the F1 candidate first patterns is used to indicate TCI-state, where r i is the number of sub-frequency domain resources included in the i-th frequency domain resource, The r corresponding to the i-th frequency domain resource in the TCI-state i The jth TCI-state in the TCI-states is used to indicate at least one signal and the QCL type corresponding to each signal in the at least one signal, and the r corresponding to the i-th frequency domain resource indicated by the first pattern indicated by the second indication information i At least one signal indicated by the jth TCI-state in the TCI-states and the DMRS of the PDSCH transmitted on the jth sub-frequency domain resource of the i-th frequency domain resource are QCL, wherein r i is an integer greater than or equal to 1, and j ranges from 1 to r i , F1 is an integer greater than or equal to 1.

5. The method according to claim 2, characterized in that The second indication information is used to indicate QCL information of the DMRS of the i-th PDSCH, including: The second indication information is used to indicate a second pattern, the second pattern is included in P1 candidate second patterns, each second pattern in the P1 candidate second patterns is used to indicate the first pattern of each time unit in a group of time units, and the first pattern of each time unit is used to indicate TCI-state, where r i is the number of sub-frequency domain resources included in the i-th frequency domain resource, The r corresponding to the i-th frequency domain resource in the TCI-state i The jth TCI-state in the TCI-states is used to indicate at least one signal and the QCL type corresponding to each signal in the at least one signal, and the first time unit indicated by the second pattern indicated by the second indication information corresponds to the i-th frequency domain resource indicated by the first pattern. i At least one signal indicated by the jth TCI-state in the TCI-states and the DMRS of the PDSCH transmitted on the jth sub-frequency domain resource of the i-th frequency domain resource are QCL, wherein r i is an integer greater than or equal to 1, and j ranges from 1 to r i , P1 is an integer greater than or equal to 1, and the i-th PDSCH is transmitted in the first time unit.

6. The method according to claim 2, characterized in that The second indication information is used to indicate QCL information of the DMRS of the i-th PDSCH, including: The second indication information is used to indicate Z2 third patterns, where the Z2 third patterns are included in the Z1 candidate third patterns; Among them, for one of the Z2 third patterns, the one third pattern corresponds to a TCI-state, and the one third pattern is used to indicate elements, the The elements correspond one-to-one to the first frequency domain resource to the Nth frequency domain resource. sub-frequency domain resources, where r i is the number of sub-frequency domain resources included in the i-th frequency domain resource, for the The r corresponding to the i-th frequency domain resource in the element i An element in an element, when the value of the element is t1, the DMRS of the i-th PDSCH transmitted on the sub-frequency domain resource corresponding to the element and at least one signal indicated by the TCI state are QCL, and the TCI-state is also used to indicate the QCL type corresponding to each signal in the at least one signal.

7. The method according to claim 2, characterized in that The second indication information is used to indicate QCL information of the DMRS of the i-th PDSCH, including: The second indication information is used to indicate X2 fourth patterns, where the X2 fourth patterns are included in the X1 candidate fourth patterns; Among them, for one fourth pattern of the X2 fourth patterns, the one fourth pattern corresponds to a TCI-state, and the one fourth pattern is used to indicate the corresponding state of each time unit in a group of time units. elements, the The elements correspond one-to-one to the first frequency domain resource to the Nth frequency domain resource. sub-frequency domain resources, where r i is the number of sub-frequency domain resources included in the i-th frequency domain resource; For the first time unit The r corresponding to the i-th frequency domain resource in the element i An element in the elements, when the value of the element is t1, the DMRS of the i-th PDSCH transmitted on the sub-frequency domain resource corresponding to the element and at least one signal indicated by the TCI state is QCL, and the TCI-state is also used to indicate the QCL type corresponding to each signal in the at least one signal, wherein the i-th PDSCH is transmitted in the first time unit.

8. A method for repeated data transmission, characterized in that: include: Sending first indication information to the terminal device, where the first indication information is used to indicate an i-th frequency domain resource of an i-th downlink shared data channel PDSCH and an i-th antenna port set of a demodulation reference signal DMRS of the i-th PDSCH, where the i-th antenna port set includes one or more antenna ports; Using the i-th antenna port set, sending the i-th PDSCH to the terminal device on the i-th frequency domain resource, where the i-th PDSCH carries i-th repeated data; The value of i ranges from 1 to N, and N is an integer greater than or equal to 2.

9. The method according to claim 8, characterized in that The method further includes: sending second indication information to the terminal device; wherein, The second indication information is used to indicate QCL information of the DMRS of the i-th PDSCH.

10. The method according to claim 9, characterized in that The second indication information is used to indicate QCL information of the DMRS of the i-th PDSCH, including: The second indication information is used to indicate a transmission configuration number-state TCI-state, and the one TCI-state is included in S1 TCI-states. Each TCI-state in the S1 TCI-states is used to indicate at least one signal and the QCL type corresponding to each signal in the at least one signal. The at least one signal indicated by the indicated TCI-state and the DMRS of the i-th PDSCH are QCL.

11. The method according to claim 9, characterized in that The second indication information is used to indicate QCL information of the DMRS of the i-th PDSCH, including: The second indication information is used to indicate a first pattern, the first pattern is included in F1 candidate first patterns, and each first pattern in the F1 candidate first patterns is used to indicate TCI-state, where r i is the number of sub-frequency domain resources included in the i-th frequency domain resource, The r corresponding to the i-th frequency domain resource in the TCI-state i The jth TCI-state in the TCI-states is used to indicate at least one signal and the QCL type corresponding to each signal in the at least one signal, and the r corresponding to the i-th frequency domain resource indicated by the first pattern indicated by the second indication information i At least one signal indicated by the jth TCI-state in the TCI-states and the DMRS of the PDSCH transmitted on the jth sub-frequency domain resource of the i-th frequency domain resource are QCL, wherein r i is an integer greater than or equal to 1, and j ranges from 1 to r i , F1 is an integer greater than or equal to 1.

12. The method according to claim 9, characterized in that The second indication information is used to indicate QCL information of the DMRS of the i-th PDSCH, including: The second indication information is used to indicate a second pattern, the second pattern is included in P1 candidate second patterns, each second pattern in the P1 candidate second patterns is used to indicate the first pattern of each time unit in a group of time units, and the first pattern of each time unit is used to indicate TCI-state, where r i is the number of sub-frequency domain resources included in the i-th frequency domain resource, The r corresponding to the i-th frequency domain resource in the TCI-state i The jth TCI-state in the TCI-states is used to indicate at least one signal and the QCL type corresponding to each signal in the at least one signal, and the first time unit indicated by the second pattern indicated by the second indication information corresponds to the i-th frequency domain resource indicated by the first pattern. i At least one signal indicated by the jth TCI-state in the TCI-states and the DMRS of the PDSCH transmitted on the jth sub-frequency domain resource of the i-th frequency domain resource are QCL, wherein r i is an integer greater than or equal to 1, and j ranges from 1 to r i , P1 is an integer greater than or equal to 1, and the i-th PDSCH is transmitted in the first time unit.

13. The method according to claim 9, characterized in that The second indication information is used to indicate QCL information of the DMRS of the i-th PDSCH, including: The second indication information is used to indicate Z2 third patterns, where the Z2 third patterns are included in the Z1 candidate third patterns; Among them, for one of the Z2 third patterns, the one third pattern corresponds to a TCI-state, and the one third pattern is used to indicate elements, the The elements correspond one-to-one to the first frequency domain resource to the Nth frequency domain resource. sub-frequency domain resources, where r i is the number of sub-frequency domain resources included in the i-th frequency domain resource, for the The r corresponding to the i-th frequency domain resource in the element i An element in an element, when the value of the element is t1, the DMRS of the i-th PDSCH transmitted on the sub-frequency domain resource corresponding to the element and at least one signal indicated by the TCI state are QCL, and the TCI-state is also used to indicate the QCL type corresponding to each signal in the at least one signal.

14. The method according to claim 9, characterized in that The second indication information is used to indicate QCL information of the DMRS of the i-th PDSCH, including: The second indication information is used to indicate X2 fourth patterns, where the X2 fourth patterns are included in the X1 candidate fourth patterns; Among them, for one fourth pattern of the X2 fourth patterns, the one fourth pattern corresponds to a TCI-state, and the one fourth pattern is used to indicate the corresponding state of each time unit in a group of time units. elements, the The elements correspond one-to-one to the first frequency domain resource to the Nth frequency domain resource. sub-frequency domain resources, where r i is the number of sub-frequency domain resources included in the i-th frequency domain resource; For the first time unit The r corresponding to the i-th frequency domain resource in the element i An element in the elements, when the value of the element is t1, the DMRS of the i-th PDSCH transmitted on the sub-frequency domain resource corresponding to the element and at least one signal indicated by the TCI state is QCL, and the TCI-state is also used to indicate the QCL type corresponding to each signal in the at least one signal, wherein the i-th PDSCH is transmitted in the first time unit.

15. A communication device, characterized in that: The invention comprises a module for implementing the method according to any one of claims 1 to 7.

16. A communication device, characterized in that: The method comprises a processor and a memory, wherein the memory and the processor are coupled, and the processor is configured to execute the method according to any one of claims 1 to 7.

17. A communication device, characterized in that: The invention comprises a processor and a communication interface, wherein the processor utilizes the communication interface to: receiving first indication information from a network device, where the first indication information is used to indicate an i-th frequency domain resource of an i-th downlink shared data channel PDSCH and an i-th antenna port set of a demodulation reference signal DMRS of the i-th PDSCH, where the i-th antenna port set includes one or more antenna ports; Receiving, using the i-th antenna port set, the i-th PDSCH from the network device on the i-th frequency domain resource, where the i-th PDSCH carries i-th repeated data; The value of i ranges from 1 to N, and N is an integer greater than or equal to 2.

18. A communication device, characterized in that: The method comprises a module for implementing the method according to any one of claims 8 to 14.

19. A communication device, characterized in that: The method comprises a processor and a memory, wherein the memory is coupled to the processor, and the processor is configured to execute the method according to any one of claims 8 to 14.

20. A communication device, characterized in that: The invention comprises a processor and a communication interface, wherein the processor utilizes the communication interface to: Sending first indication information to the terminal device, where the first indication information is used to indicate an i-th frequency domain resource of an i-th downlink shared data channel PDSCH and an i-th antenna port set of a demodulation reference signal DMRS of the i-th PDSCH, where the i-th antenna port set includes one or more antenna ports; Using the i-th antenna port set, sending the i-th PDSCH to the terminal device on the i-th frequency domain resource, where the i-th PDSCH carries i-th repeated data; The value of i ranges from 1 to N, and N is an integer greater than or equal to 2.

21. A communication system, characterized in that: The invention comprises the communication device according to any one of claims 15 to 17, and the communication device according to any one of claims 18 to 20.

22. A computer-readable storage medium, characterized in that The method comprises instructions which, when executed on a computer, cause the computer to execute the method according to any one of claims 1 to 14.

Images