Communication method and communication device

Abstract

Provided are a communication method and a communication device, the communication method comprising: determining a first time-frequency resource, the first time-frequency resource being used for bearing a first reference signal and first data, the first reference signal being used for determining channel state information (CSI); and on the first time-frequency resource, receiving the first reference signal to determine the CSI, and receiving the first data. According to the method provided by the embodiment of the invention, the time delay of the communication equipment for measuring the CSI and receiving the data is reduced, and the time delay of the communication equipment working in an activated state is further reduced.

Description

Technical Field

[0001] This application relates to the field of communications, and more particularly, to a communication method and a communication device. Background Art

[0002] In release 18 of the 5th generation (5G) mobile communication system, research on low power wake up signal (LP WUS) has been carried out to evaluate the potential of communication devices equipped with low power wake up radio (LP WUR), such as terminal devices or network devices, to reduce power consumption. Generally speaking, a communication device consumes tens of milliwatts of power even when it does not send or receive any data. This idle power consumption is due to the fact that the communication device must regularly measure and detect potential paging messages. If the communication device detects an LP WUS signal, it will continue to decode the paging message and wake up from the sleep state to the active state to work, otherwise it will return to the sleep state and wait for the next time to receive the LP WUS signal.

[0003] However, when a communication device in the connected state wakes up from the sleep state to the active state to work, due to the movement of the user of the communication device such as a terminal device, it may cause uplink and downlink beam misalignment, or due to outdated channel information, the communication device needs to re-measure the channel information, or due to synchronization timeout, the communication device needs to re-transmit a synchronization signal / PBCH block (SSB) for time-frequency domain synchronization, etc. At this time, the communication device needs to perform steps such as re-synchronization, channel measurement, and measurement feedback. This process takes a long time and the delay of measurement feedback is high, ultimately resulting in the inability to timely feedback channel changes. Summary of the Invention

[0004] This application provides a communication method and a communication device. By carrying a reference signal and data in the same time-frequency resource, the delay of the communication device for measuring CSI and receiving data is reduced, and further the delay of the communication device for working in the active state is reduced.

[0005] In a first aspect, a communication method is provided. This method can be applied to a network device or a terminal device, or a component of a network device or a terminal. For simplicity, here the execution by a network device or a terminal device is taken as an example for illustration.

[0006] The communication method of the first aspect can be applied to a communication system including a network device and a terminal device, such as a communication system in a standalone (SA) scenario or a dual connectivity (DC) scenario.

[0007] Exemplarily, in the communication system of the SA scenario, the terminal device is connected to a single network device, and the network device to which the terminal device is connected and the core network to which the network device is connected are of the same radio access technology. For example, the core network is a 5G core network, and the corresponding network device is a 5G base station, and the 5G base station is directly connected to the 5G core network; or the core network is a 6G core network, and the corresponding network device is a 6G base station, and the 6G base station is directly connected to the 6G core network.

[0008] Exemplarily, in the DC scenario, the terminal device is simultaneously connected to network devices of different or the same radio access technology, which is applicable to a connected UE. For example, when the core network is a 5G core network, the terminal device can be simultaneously connected to a 5G base station and a 6G base station, where the 5G base station is the master station and the 6G base station is the secondary station; for another example, when the core network is a 6G core network, the terminal device can be simultaneously connected to a 5G base station and a 6G base station, where the 6G base station is the master station and the 5G base station is the secondary station; for yet another example, when the core network is a 6G core network, the terminal device can be simultaneously connected to two 6G base stations, that is, both the master station and the secondary station are 6G base stations.

[0009] It should be noted that the communication system applicable to the embodiments of the present application is not limited thereto, and any communication that can implement the functions of the above-mentioned network elements is applicable to the embodiments of the present application. The communication system of the embodiments of the present application can also be a non-terrestrial network (NTN) communication system, such as a satellite communication network, a high-altitude platform station (HAPS), and an air-to-ground network. For example, a satellite communication system can include a satellite, and there are terminal devices on the satellite communicating with a ground base station. Among them, the satellite can refer to non-ground base stations or non-ground devices such as unmanned aerial vehicles, hot air balloons, low-earth orbit satellites, medium-earth orbit satellites, and geostationary orbit satellites. The NTN communication system can be deployed independently or as a supplement to the ground network. It should also be understood that the above naming is only defined for the convenience of distinguishing different functions and should not constitute any limitation to the present application. The present application does not exclude the possibility of using other naming in the 6G network and future other networks.

[0010] The method includes: determining a first time-frequency resource for carrying a first reference signal and first data, where the first reference signal is used to determine channel state information (CSI); on the first time-frequency resource, receiving the first reference signal to determine the CSI, and receiving the first data.

[0011] Optionally, in the embodiments of the present application, the first reference signal may be a channel state information-reference signal (CSI-RS), or may be other reference signals that may be used to determine channel state information (CSI), such as a demodulation reference signal (DMRS). When the terminal device executes the communication method of the first aspect, the first data may be downlink data transmitted in a physical downlink shared channel (PDSCH); when the network device executes the communication method of the first aspect, the first data may be uplink data transmitted in a physical uplink shared channel (PUSCH).

[0012] Optionally, CSI may include a CSI resource index, a rank indicator (RI), a channel quality indicator (CQI), etc. Among them, in order to reduce the number of feedback bits, the network device may select one or more optimal CQIs in the sub-band CQIs for reporting. Optionally, the CSI may further include a precoding matrix indicator (PMI), where the PMI may be used to feedback the precoding matrix when the power difference of the pilot signal is 0, and may also reduce the bit overhead of the feedback.

[0013] It should be understood that when the communication device is in the active state for operation, the communication device needs to send one or more SSBs for time-frequency domain synchronization. Then the communication device (such as the terminal device) receives downlink control information (DCI) from another communication device (such as the network device). Finally, the communication device receives the first reference signal for determining channel state information (CSI) and the data in the channel, as well as feedbacks the channel state information CSI and the data decoding result.

[0014] However, when a communication device in the connected state wakes up from the dormant state to the active state for operation, due to the outdated channel information, the communication device needs to re-measure the channel information. Or, due to the movement of the user of the communication device such as a terminal device, the uplink and downlink beams may not be aligned. Or, due to synchronization timeout, the communication device needs to re-transmit a synchronization signal / PBCH block (SSB) for time-frequency domain synchronization, etc. At this time, the communication device needs to perform steps such as re-synchronization, channel measurement, and measurement feedback. The latency of the above steps is relatively long, resulting in the communication device being unable to timely feedback channel changes.

[0015] Therefore, compared with carrying the first reference signal and the first data on multiple different time-domain resources with time intervals respectively, in the technical solution of this application, by carrying the first reference signal and the first data in the same time-frequency resource, the latency of the communication device for measuring CSI and receiving data is reduced, and further the total latency of steps such as the communication device performing re-synchronization, channel measurement, and measurement feedback is reduced.

[0016] Optionally, the communication method shown in the first aspect can be used only by being triggered by a communication device, or it can be without triggering. For example, when the time-domain position and / or frequency-domain position of the first reference signal and the first data are configured in the DCI that the communication device needs to send, the communication device can default to use the communication method shown in the first aspect. For another example, the communication device can be instructed by DCI to work in the active state using the communication method shown in the first aspect. For another example, the communication device can be through its own event reporting. For example, the conditions for reporting events can be based on the increase and decrease of the measured channel path loss, the change of the measurement result of the mobility of the terminal device user, etc., or the above-mentioned outdated channel information or synchronization timeout, etc.

[0017] Combined with the first aspect, in some implementation manners of the first aspect, the first time-frequency resource is included in a transmission time interval (TTI), or included in a time slot, or included in a symbol.

[0018] It should be understood that in a wireless communication system, data or information can be carried by time-frequency resources, where the time-frequency resources can include resources in the time domain and resources in the frequency domain. Among them, the resources in the time domain can include one or more time-domain units. A time-domain unit can be a symbol, or a mini-slot, or a slot, or a transmission time interval (TTI), or a subframe. Among them, the duration of a subframe in the time domain can be 1 millisecond (ms). A slot consists of 14 symbols, and a mini-slot can include at least one symbol (for example, 2 symbols or 7 symbols or 14 symbols, or any number of symbols less than or equal to 14 symbols).

[0019] In the embodiments of the present application, the time-domain positions where the communication device receives the first reference signal and the first data are in the same time-domain unit, such as the same TTI or the same slot or the same symbol. And preferably, there is no time interval or time delay between the time-domain positions where the first reference signal and the first data are received. For example, taking being in the same slot as an example. The slot can include 14 symbols, where the communication device can receive the first reference signal in the first k symbols, and can start receiving the first data from another communication device after the jth symbol, where k is a positive integer and j is a positive integer greater than k. Preferably, in the embodiments of the present application, the value of j can be k + 1. In this way, there is no time interval or time delay between the communication device receiving the first reference signal and receiving the first data, or in other words, the first data is received immediately after the communication device receives the first reference signal.

[0020] By the above method, the time delay for the communication device to measure CSI and receive data is reduced, and further the total time delay for the communication device to perform steps such as resynchronization, channel measurement, and measurement feedback is reduced.

[0021] Combined with the first aspect, in some implementation manners of the first aspect, the time-domain position of the first reference signal on the first time-frequency resource is before the time-domain position of the first data on the first time-frequency resource.

[0022] By the above method, placing the time-domain position of the first reference signal at a relatively early time-domain position in the first time-frequency resource can enable the communication device to quickly obtain CSI before feedback.

[0023] In connection with the first aspect, in some implementations of the first aspect, the determination of the first time-frequency resource includes: receiving first indication information for indicating the time domain position and / or frequency domain position of receiving the first data within the first time-frequency resource and the time domain position and / or frequency domain position of receiving the first reference signal; and determining the first time-frequency resource according to the first indication information.

[0024] In connection with the first aspect, in some implementations of the first aspect, the first indication information is included in downlink control information DCI or radio resource control RRC signaling.

[0025] Exemplarily, DCI can indicate the time domain position of the first data on the first time-frequency resource through the K0 value, where K0 is the time slot offset between the communication device receiving DCI and the channel for scheduling the transmission of the first data or the reception of the first data; DCI can indicate the time domain position of the first reference signal such as CSI-RS on the first time domain resource through the K0 + offset value. When the value of offset is 0, the first reference signal and the first data are multiplexed on the same time domain unit resource and are in different frequency domain resources. When the value of offset is greater than 0 or less than 0, the time domain position of the first reference signal is before or after the time domain position of the first data.

[0026] In connection with the first aspect, in some implementations of the first aspect, the first time-frequency resource is further used to carry first information, and the first information includes the decoding results of the CSI and the first data.

[0027] Specifically, the above method is a process for a communication device to feedback the decoding results of CSI and the first data, enabling the communication device receiving the first information to adjust the data transmission process in the channel according to the feedback results. When the communication device is a terminal device, the first information can be uplink information; when the communication device is a network device, the first information can be downlink information.

[0028] It should be understood that in the above method, both the first reference signal and the first data are received through the first time-frequency resource, and the decoding results of CSI and the first data are also feedback. In other words, the processes of the communication device measuring CSI, receiving data, and feedback are all in the same time domain resource, thereby reducing the latency of the entire working process when the communication device is in the active state.

[0029] In connection with the first aspect, in some implementations of the first aspect, the method further includes: determining a second time-frequency resource for carrying the first information, where the first information includes the decoding results of the CSI and the first data.

[0030] Specifically, the above method is a process for a communication device to feedback the decoding results of CSI and the first data, enabling the communication device that receives the first information to adjust the data transmission process in the channel according to the feedback results. When the communication device is a terminal device, the first information may be uplink information; when the communication device is a network device, the first information may be downlink information.

[0031] It should be understood that in the above solution, the decoding results of CSI and the first data are feedback through the second time-frequency resource. There may be one or more time domain units such as symbols or time slots between the second time-frequency resource and the first time-frequency resource. In the embodiments of the present application, the total delay of the communication device's working process can also be reduced by narrowing the time interval between the first time-frequency resource and the second time-frequency resource.

[0032] Combined with the first aspect, in some implementation manners of the first aspect, the determining the second time-frequency resource includes: receiving second indication information, where the second indication information is used to indicate the time domain position and / or frequency domain position of sending the first information within the second time-frequency resource; determining the second time-frequency resource according to the second indication information.

[0033] Combined with the first aspect, in some implementation manners of the first aspect, the second indication information is included in the DCI, or the second indication information includes the identification information of the hybrid automatic repeat request acknowledgement HARQ-ACK.

[0034] Exemplarily, the DCI can indicate the time domain position of the communication device on the first time-frequency resource when feedbacking the decoding results of CSI and the first data through the value of K0 + offset + K1. K0 is the time slot offset between the communication device receiving the DCI and receiving the first data, and K1 is the time slot offset between the first communication device receiving the first data and scheduling the channel resource for feedbacking data. When the value of offset is 0, the time domain position of the communication device feedbacking the decoding results of CSI and the first data is the time domain position when scheduling the channel resource. When the value of offset is greater than 0, the time domain position of feedbacking the decoding results of CSI and the first data is after the time domain position of scheduling the channel resource.

[0035] Combined with the first aspect, in some implementation manners of the first aspect, the first time-frequency resource is further used to carry a second reference signal, and the second reference signal is used to demodulate the channel for receiving the first data.

[0036] In the embodiments of the present application, the second reference signal may be a demodulation reference signal DMRS, or other reference signals that can be used to estimate channel information to demodulate the channel. This is not limited herein.

[0037] In combination with the first aspect, in some implementations of the first aspect, the time domain position of the second reference signal in the first time-frequency resource is different from the time domain position of the first reference signal in the first time-frequency resource; or, the time domain position of the second reference signal in the first time-frequency resource is the same as the time domain position of the first reference signal in the first time-frequency resource, and the frequency domain position of the first reference signal in the first time-frequency resource and the frequency domain position of the second reference signal in the first time-frequency resource have a form of frequency division multiplexing (FDM) or code division multiplexing (CDM).

[0038] It should be noted that, preferably, the time domain positions of the first reference signal and the second reference signal in the first time-frequency resource may be before the time domain position of the first data in the first time-frequency resource.

[0039] In combination with the first aspect, in some implementations of the first aspect, the method further includes: obtaining a first correspondence between a plurality of first ports and a plurality of second ports, where the first ports are used to determine the CSI, and the second ports are used to demodulate the channels for receiving the first data, and the frequency domain positions of each first port and the corresponding second port are the same while the time domain positions are different; determining measurement results of (K1 + K2) first ports according to K1 first ports among the plurality of first ports, K2 second ports among the plurality of second ports, and the first correspondence, where the K2 second ports correspond to the K2 first ports, and K1 and K2 are integers.

[0040] In an embodiment of the present application, the first reference signal may be a CSI-RS, the first port may be a port for determining the CSI by measuring the CSI-RS, the second reference signal may be a DMRS, and the second port may be for demodulating the channel by estimating the channel information.

[0041] For example, the first port port1000 and the second port port3000 are in the same frequency domain position and have similar time domain positions, and the first port port1001 and the second port port3001 are in the same frequency domain position and have similar time domain positions. Therefore, it can be determined that the channel information measurement results of port1000 and port3000 are similar, and the channel information measurement results of port1001 and port3001 are similar. Finally, the correspondence between port1000 corresponding to port3000 and port1001 corresponding to port3001 is determined. When the communication device needs the channel information measurement results of four ports, namely port3000 to port3003 of the second port, the channel information measurement results of four ports, namely port3000 to port3003, can be obtained by measuring four ports, namely port1000, port1001, port3002, and port3003.

[0042] In other words, each first port is in the same frequency domain position as the corresponding second port and in different time domain positions. The time domain positions of the two ports can be very close or have no time interval. The communication device can determine the measurement results of (K1 + K2) first ports according to the K1 first ports, the K2 second ports, and the corresponding relationship. The K2 second ports correspond to the K2 first ports, where K1 and K2 are integers. For example, K1 or K2 can be 0, that is, in the embodiments of the present application, multiple second ports can be directly measured, and the channel information measurement results of the multiple second ports can be used as the channel information measurement results of the corresponding multiple first ports. The channel information measurement results are used to determine the CSI, or in the embodiments of the present application, multiple first ports can be directly measured, and the channel information measurement results of the multiple first ports can be used as the channel information measurement results of the corresponding multiple second ports. The channel information measurement results are used to demodulate the channel for transmitting the first data.

[0043] Combined with the first aspect, in some implementation manners of the first aspect, the method further includes: determining a power deviation between the first port and the second port according to the frequency domain density of the first reference signal and the frequency domain density of the second reference signal. The first port is used to determine the CSI, and the second port is used to demodulate the channel for receiving the first data.

[0044] Combined with the first aspect, in some implementation manners of the first aspect, the method further includes: adjusting the number of first ports according to the decoding result of the first data. The first port is used to determine the CSI.

[0045] It should be understood that the communication device can measure the first reference signal through the first port to obtain channel information to determine the CSI, and can estimate the channel information through the second port to demodulate the channel for transmitting the first data. The number of the first port and the second port affects the delay of the first communication device to obtain the channel information.

[0046] In the embodiments of the present application, the communication device can adjust the number of the first port or the second port used to measure the channel according to the obtained decoding result of the first data. The first port or the second port with the adjusted number is used for the next working process of the communication device, that is, when the communication device re-performs the working processes such as re-synchronization in the active state, channel measurement, and measurement feedback, the first port or the second port with the adjusted number is used to measure the channel.

[0047] Exemplarily, ACK = 0 indicates that the decoding result of the first data is correct. At this time, the communication device can incrementally increase the number of the first port or the second port. For example, it can be increased from 1 port to 2 ports, and then from 2 ports to 4 ports. Incrementally increasing the number of measured ports can reduce the processing delay and resource configuration overhead, and at the same time, the feedback overhead is also small. In the embodiments of the present application, the number of the first port or the second port can also be increased to 8 ports or more. However, correspondingly, the delay of the measured channel will gradually increase. Similarly, ACK = 1 indicates that the decoding result of the first data is incorrect. At this time, the communication device can incrementally decrease the number of the first port or the second port. For example, it can be decreased from 2 ports to 1 port.

[0048] In combination with the first aspect, in some implementation manners of the first aspect, the adjustment of the number of the first ports includes: obtaining third indication information, where the third indication information is used to indicate a plurality of third time-frequency resources in the first time-frequency resource, and the number of the first ports used within the plurality of third time-frequency resources is different; adjusting the time-frequency position when receiving the first reference signal from a fourth time-frequency resource to a fifth time-frequency resource, where the plurality of third time-frequency resources includes the fourth time-frequency resource and the fifth time-frequency resource.

[0049] For example, the DCI received by the communication device indicates that in symbol x1, the communication device measures the channel information through 1 port, in symbol x2, the communication device measures the channel information through 2 ports, and in symbol x3, the communication device measures the channel information through 4 ports. Furthermore, when ACK = 0, the communication device can adjust the measurement resource or the time-frequency resource of the first reference signal from symbol x1 to symbol x2, or switch from symbol x1 to symbol x2, so that the number of the first ports used in the next working process of the communication device is adjusted from 1 port to 2 ports. Similarly, the communication device adjusts the measurement resource or the time-frequency resource of the first reference signal from symbol x3 to symbol x2, so that the number of the first ports used in the next working process of the communication device is adjusted from 4 ports to 2 ports.

[0050] It should be noted that the above manner of indicating a plurality of measurement resources or a plurality of time-frequency resources by DCI is only an example, and the present application does not limit the indication manner of a plurality of measurement resources or a plurality of time-frequency resources. For example, a plurality of measurement resources or a plurality of time-frequency resources can also be indicated by a predefined rule.

[0051] In combination with the first aspect, in some implementations of the first aspect, the method further includes: performing beam scanning on a plurality of sixth time-frequency resources, obtaining a plurality of beam scanning feedback results, where the plurality of sixth time-frequency resources are used to respectively carry a plurality of first reference signals, and the time-domain positions of the plurality of sixth time-frequency resources on the first time-frequency resource are different.

[0052] It should be understood that in the embodiments of the present application, narrow beams can be used for beam scanning on the measurement resources or time-frequency resources of the first reference signal such as CSI-RS, and wide beams can be used for beam scanning on the time-frequency resources of the first data, thereby ensuring the data transmission quality.

[0053] Optionally, the above-mentioned plurality of sixth time-frequency resources may all be included in 1 symbol, but are distributed in a plurality of different symbols. In this way, it can be ensured that the time-domain positions of different time-domain resources do not overlap, and the feedback overhead is small. For example, the starting time slots of the plurality of sixth time-domain resources are the same, and different offset values are respectively indicated in the DCI received by the communication device, so that the time-domain positions of the plurality of sixth time-domain resources do not overlap.

[0054] In combination with the first aspect, in some implementations of the first aspect, the number of first ports for measuring each first reference signal among the plurality of first reference signals is 1.

[0055] It should be understood that the reason is that the result of beam scanning is not accurate enough, and using too many first ports will waste port resources.

[0056] In combination with the first aspect, in some implementations of the first aspect, the method further includes: sending at least two first pieces of information, where each of the at least two first uplink pieces of information includes at least one of the plurality of beam scanning feedback results.

[0057] It should be understood that after obtaining a plurality of beam scanning results, the communication device needs to report or feedback the beam scanning results through uplink information or downlink information, and the process is similar to the process of feedback CSI and the decoding result of the first data described above. However, since the communication device also needs to feedback the CSI and the decoding result of the first data through one uplink information or one downlink information at the same time, the channel resources are limited at this time, and it may not be possible to complete the reporting of the beam scanning results at one time, and additional one or more uplink information or downlink information are needed to feedback the beam scanning results.

[0058] In combination with the first aspect, in some implementations of the first aspect, before determining the first time-frequency resource, the method further includes: receiving a first wake-up signal, where the first wake-up signal is used to activate the terminal device or the network device.

[0059] In an embodiment of the present application, the first wake-up signal may be an LP WUS signal. Consequently, after the communication device receives the first wake-up signal, it wakes up from the sleep state to the active state.

[0060] In a second aspect, a communication method is provided. This method can be applied to a terminal device or a network device, or a component of a terminal device or a network device. For simplicity, the execution by a terminal device or a network device is taken as an example for description here.

[0061] The method includes: determining a first time-frequency resource that is used to carry a first reference signal and first data, where the first reference signal is used to determine channel state information (CSI); and transmitting the first reference signal and the first data on the first time-frequency resource.

[0062] In combination with the second aspect, in some implementation manners of the second aspect, the first time-frequency resource is included in a transmission time interval (TTI), or included in a time slot, or included in a symbol.

[0063] In combination with the second aspect, in some implementation manners of the second aspect, the time-domain position of the first reference signal on the first time-frequency resource is before the time-domain position of the first data on the first time-frequency resource.

[0064] In combination with the second aspect, in some implementation manners of the second aspect, the method further includes: transmitting first indication information that is used to indicate the time-domain position and / or frequency-domain position of transmitting the first data and the time-domain position and / or frequency-domain position of transmitting the first reference signal within the first time-frequency resource.

[0065] In combination with the second aspect, in some implementation manners of the second aspect, the first indication information is included in downlink control information (DCI) or radio resource control (RRC) signaling.

[0066] In combination with the second aspect, in some implementation manners of the second aspect, the first time-frequency resource is further used to carry first information, where the first information includes the CSI and the decoding result of the first data.

[0067] In combination with the second aspect, in some implementation manners of the second aspect, the method further includes: transmitting second indication information that is used to indicate the time-domain position and / or frequency-domain position of receiving the first information within a second time-frequency resource, where the first information includes the CSI and the decoding result of the first data.

[0068] In combination with the second aspect, in some implementation manners of the second aspect, the first time-frequency resource is further used to carry a second reference signal, where the second reference signal is used to demodulate the channel for transmitting the first data.

[0069] In combination with the second aspect, in some implementations of the second aspect, the time domain position of the second reference signal in the first time-frequency resource is different from the time domain position of the first reference signal in the first time-frequency resource; or, the time domain position of the second reference signal in the first time-frequency resource is the same as the time domain position of the first reference signal in the first time-frequency resource, and the frequency domain position of the first reference signal in the first time-frequency resource and the frequency domain position of the second reference signal in the first time-frequency resource have a form of frequency division multiplexing (FDM) or code division multiplexing (CDM).

[0070] In combination with the second aspect, in some implementations of the second aspect, before determining the first time-frequency resource, the method further includes: sending a first wake-up signal for activating a network device or a terminal device.

[0071] For the specific solution description and beneficial effects of the communication method shown in the second aspect, reference may be made to the first aspect, which will not be elaborated herein.

[0072] In a third aspect, a communication device is provided, including: a processing unit configured to determine a first time-frequency resource for carrying a first reference signal and first data, where the first reference signal is used to determine channel state information (CSI); and a transceiver unit configured to receive the first reference signal on the first time-frequency resource to determine the CSI, and receive the first data.

[0073] In combination with the third aspect, in some implementations of the third aspect, the first time-frequency resource is included in one transmission time interval (TTI), or included in one time slot, or included in one symbol.

[0074] In combination with the third aspect, in some implementations of the third aspect, the time domain position of the first reference signal on the first time-frequency resource is before the time domain position of the first data on the first time-frequency resource.

[0075] In combination with the third aspect, in some implementations of the third aspect, the transceiver unit is further configured to receive first indication information for indicating the time domain position and / or frequency domain position of receiving the first data and the time domain position and / or frequency domain position of receiving the first reference signal within the first time-frequency resource; and the processing unit is specifically configured to determine the first time-frequency resource according to the first indication information.

[0076] In combination with the third aspect, in some implementations of the third aspect, the first indication information is included in downlink control information (DCI) or radio resource control (RRC) signaling.

[0077] In combination with the third aspect, in some implementation manners of the third aspect, the first time-frequency resource is further used to carry first information, and the first information includes the CSI and the decoding result of the first data.

[0078] In combination with the third aspect, in some implementation manners of the third aspect, the processing unit is further used to: determine a second time-frequency resource, where the second time-frequency resource is used to carry first information, and the first information includes the CSI and the decoding result of the first data.

[0079] In combination with the third aspect, in some implementation manners of the third aspect, the transceiver unit is further used to: receive second indication information, where the second indication information is used to indicate the time domain position and / or the frequency domain position for transmitting the first information within the second time-frequency resource; specifically, the processing unit is used to: determine the second time-frequency resource according to the second indication information.

[0080] In combination with the third aspect, in some implementation manners of the third aspect, the second indication information is included in DCI, or the second indication information includes identification information of hybrid automatic repeat request acknowledgement HARQ-ACK.

[0081] In combination with the third aspect, in some implementation manners of the third aspect, the first time-frequency resource is further used to carry a second reference signal, and the second reference signal is used to demodulate the channel for receiving the first data.

[0082] In combination with the third aspect, in some implementation manners of the third aspect, the time domain position of the second reference signal in the first time-frequency resource is different from the time domain position of the first reference signal in the first time-frequency resource; or, the time domain position of the second reference signal in the first time-frequency resource is the same as the time domain position of the first reference signal in the first time-frequency resource, and the frequency domain position of the first reference signal in the first time-frequency resource and the frequency domain position of the second reference signal in the first time-frequency resource have a frequency division multiplexing FDM form or a code division multiplexing CDM form.

[0083] In combination with the third aspect, in some implementation manners of the third aspect, the transceiver unit is further used to: obtain a first correspondence relationship between a plurality of first ports and a plurality of second ports, where the first ports are used to determine the CSI, and the second ports are used to demodulate the channel for receiving the first data, and the frequency domain positions of each first port and the corresponding second port are the same while the time domain positions are different; the processing unit is further used to: determine the measurement results of (K1 + K2) first ports according to K1 first ports among the plurality of first ports, K2 second ports among the plurality of second ports, and the first correspondence relationship, where the K2 second ports correspond to the K2 first ports, and K1 and K2 are integers.

[0084] In combination with the third aspect, in some implementations of the third aspect, the processing unit is further configured to: determine a power deviation between the first port and the second port according to the frequency-domain density of the first reference signal and the frequency-domain density of the second reference signal, where the first port is used to determine the CSI, and the second port is used to demodulate the channel for receiving the first data.

[0085] In combination with the third aspect, in some implementations of the third aspect, the processing unit is further configured to: adjust the number of first ports according to the decoding result of the first data, where the first ports are used to determine the CSI.

[0086] In combination with the third aspect, in some implementations of the third aspect, the transceiver unit is further configured to: obtain third indication information, where the third indication information is used to indicate multiple third time-frequency resources in the first time-frequency resource, and the number of first ports used within the multiple third time-frequency resources is different; specifically, the processing unit is configured to: adjust the time-frequency position when receiving the first reference signal from a fourth time-frequency resource to a fifth time-frequency resource, and the multiple third time-frequency resources include the fourth time-frequency resource and the fifth time-frequency resource.

[0087] In combination with the third aspect, in some implementations of the third aspect, the processing unit is further configured to: perform beam scanning on multiple sixth time-frequency resources to obtain multiple beam scanning feedback results, where the multiple sixth time-frequency resources are used to respectively carry multiple first reference signals, and the time-domain positions of the multiple sixth time-frequency resources on the first time-frequency resource are different.

[0088] In combination with the third aspect, in some implementations of the third aspect, the number of first ports for measuring each first reference signal among the multiple first reference signals is 1.

[0089] In combination with the third aspect, in some implementations of the third aspect, the transceiver unit is further configured to: send at least two first pieces of information, and each first uplink piece of information among the at least two first pieces of information includes at least one of the multiple beam scanning feedback results.

[0090] In combination with the third aspect, in some implementations of the third aspect, before determining the first time-frequency resource, the transceiver unit is further configured to: receive a first wake-up signal, where the first wake-up signal is used to activate the terminal device or the network device.

[0091] For the explanations and beneficial effects of the communication device related content provided in the third aspect, reference can be made to the communication method shown in the first aspect, which will not be elaborated here.

[0092] In a fourth aspect, a communication device is provided, which includes: a processing unit configured to: determine a first time-frequency resource for carrying a first reference signal and first data, where the first reference signal is used to determine channel state information (CSI); and a transceiver unit configured to: transmit the first reference signal and transmit the first data on the first time-frequency resource.

[0093] In combination with the fourth aspect, in some implementations of the fourth aspect, the first time-frequency resource is included in one transmission time interval (TTI), or included in one time slot, or included in one symbol.

[0094] In combination with the fourth aspect, in some implementations of the fourth aspect, a time domain position of the first reference signal on the first time-frequency resource is before a time domain position of the first data on the first time-frequency resource.

[0095] In combination with the fourth aspect, in some implementations of the fourth aspect, the transceiver unit is further configured to: transmit first indication information for indicating a time domain position and / or a frequency domain position of transmitting the first data and a time domain position and / or a frequency domain position of transmitting the first reference signal within the first time-frequency resource.

[0096] In combination with the fourth aspect, in some implementations of the fourth aspect, the first indication information is included in downlink control information (DCI) or radio resource control (RRC) signaling.

[0097] In combination with the fourth aspect, in some implementations of the fourth aspect, the first time-frequency resource is further used to carry first information, where the first information includes the CSI and a decoding result of the first data.

[0098] In combination with the fourth aspect, in some implementations of the fourth aspect, the transceiver unit is further configured to: transmit second indication information for indicating a time domain position and / or a frequency domain position of transmitting the first information within a second time-frequency resource, where the first information includes the CSI and a decoding result of the first data.

[0099] In combination with the fourth aspect, in some implementations of the fourth aspect, the first time-frequency resource is further used to carry a second reference signal for demodulating a channel for transmitting the first data.

[0100] In combination with the fourth aspect, in some implementations of the fourth aspect, the time domain position of the second reference signal in the first time-frequency resource is different from the time domain position of the first reference signal in the first time-frequency resource; or, the time domain position of the second reference signal in the first time-frequency resource is the same as the time domain position of the first reference signal in the first time-frequency resource, and the frequency domain position of the first reference signal in the first time-frequency resource and the frequency domain position of the second reference signal in the first time-frequency resource have a form of frequency division multiplexing (FDM) or code division multiplexing (CDM).

[0101] In combination with the fourth aspect, in some implementations of the fourth aspect, before determining the first time-frequency resource, the transceiver unit is further configured to: send a first wake-up signal, where the first wake-up signal is used to activate a network device or a terminal device.

[0102] For the explanations and beneficial effects of the communication device related to the fourth aspect, reference can be made to the communication method shown in the second aspect, which will not be elaborated here.

[0103] In a fifth aspect, a communication device is provided, including a processor, where the processor is configured to cause the communication device to execute the method in the first aspect and any possible implementation of the first aspect by executing a computer program or instruction or through a logic circuit.

[0104] In a possible implementation, the communication device further includes a memory, which is used to store the computer program or instruction.

[0105] In a possible implementation, the communication device further includes a communication interface, which is used to input and / or output signals.

[0106] In a sixth aspect, a communication device is provided, including a processor, where the processor is configured to cause the communication device to execute the method in the second aspect and any possible implementation of the second aspect by executing a computer program or instruction or through a logic circuit.

[0107] In a possible implementation, the communication device further includes a memory, which is used to store the computer program or instruction.

[0108] In a possible implementation, the communication device further includes a communication interface, which is used to input and / or output signals.

[0109] In a seventh aspect, a communication device is provided, including a logic circuit and an input / output interface, where the input / output interface is used to input and / or output signals, and the logic circuit is configured to execute the method in the first aspect and any possible implementation of the first aspect; or, the logic circuit is configured to execute the method in the second aspect and any possible implementation of the second aspect.

[0110] In an eighth aspect, a computer-readable storage medium is provided, on which a computer program or instructions are stored. When the computer program or the instructions are run on a computer, the method according to the first aspect and any one of the possible implementations of the first aspect is executed; or, the method according to the second aspect and any one of the possible implementations of the second aspect is executed.

[0111] In a ninth aspect, a computer program product is provided, which includes instructions. When the instructions are run on a computer, the method according to the first aspect and any one of the possible implementations of the first aspect is executed; or, the method according to the second aspect and any one of the possible implementations of the second aspect is executed.

[0112] In a tenth aspect, a communication system is provided. The communication system includes the communication devices according to the third aspect and the fourth aspect, or includes the communication devices according to the fifth aspect and the sixth aspect.

[0113] For the description of the beneficial effects of the third aspect to the tenth aspect, reference can be made to the description of the first aspect to the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0114] Figure 1 FIG. is a schematic architecture diagram of a communication system provided by an embodiment of the present application.

[0115] Figure 2 FIG. is a schematic architecture diagram of another communication system provided by an embodiment of the present application.

[0116] Figure 3 FIG. is a schematic diagram of the working process of a communication device in the active state provided by an embodiment of the present application.

[0117] Figure 4 FIG. is a schematic diagram of the time-domain resources for a communication device to feedback CSI and decoding results provided by an embodiment of the present application.

[0118] Figure 5 FIG. is a schematic diagram of a first time-frequency resource provided by an embodiment of the present application.

[0119] Figure 6 FIG. is a schematic diagram of the interaction process of a communication method provided by an embodiment of the present application.

[0120] Figure 7 FIG. is a schematic diagram of the interaction process of another communication method provided by an embodiment of the present application.

[0121] Figure 8 FIG. is a schematic diagram of another first time-frequency resource provided by an embodiment of the present application.

[0122] Figure 9 FIG. is a schematic diagram of the correspondence between a first port and a second port provided by an embodiment of the present application.

[0123] Figure 10 It is a schematic diagram for adjusting the number of ports provided by an embodiment of the present application.

[0124] Figure 11 It is a schematic diagram for beam scanning provided by an embodiment of the present application.

[0125] Figure 12 It is a schematic block diagram of a communication device provided by an embodiment of the present application.

[0126] Figure 13 It is a schematic block diagram of another communication device provided by an embodiment of the present application.

[0127] Figure 14 It is a schematic block diagram of another communication device provided by an embodiment of the present application. Detailed implementation manners

[0128] Next, the technical solutions in the present application will be described with reference to the accompanying drawings.

[0129] First, in combination with Figure 1 and Figure 2 , the communication system and network architecture applicable to the embodiments of the present application will be introduced.

[0130] The technical solutions provided by the present application can be applied to various communication systems, such as: the fifth generation (5G) or new radio (NR) system, the long term evolution (LTE) system, the LTE frequency division duplex (FDD) system, the LTE time division duplex (TDD) system, the universal mobile telecommunication system (UMTS), etc. The technical solutions provided by the present application can also be applied to future communication systems, such as the sixth generation (6G) mobile communication system. The technical solutions provided by the present application can also be applied to device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-to-machine (M2M) communication, machine type communication (MTC), Internet of Things (IoT) communication system, non-terrestrial network (NTN) communication system or other communication systems.

[0131] This application can also be applied to other communication systems. As long as there are entities in the communication system that need to send downlink data and pilot information, and another entity needs to receive the indication information and can feedback information and transmit data. Or rather, there are downlink and uplink communication links in the communication system.

[0132] It should be understood that the embodiments of the present application do not particularly limit the specific structure of the execution subject of the provided method. As long as it can communicate according to the method provided by the embodiments of the present application by running a program that records the code of the method provided by the embodiments of the present application. For example, the execution subject of the method provided by the embodiments of the present application can be a terminal device or a network device, or a functional module in the terminal device or network device that can call and execute the program.

[0133] As an example, Figure 1 and Figure 2 FIG. shows a schematic architecture diagram of a network architecture provided by an embodiment of the present application. Exemplarily, the architecture may include a terminal device, a network device, and a core network.

[0134] The terminal device involved in the embodiments of the present application can also be referred to as a terminal. It can be a device with wireless transceiver functions. It can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; it can also be deployed on the water surface (such as a ship, etc.); it can also be deployed in the air (such as an airplane, a balloon, a satellite, etc.). The terminal device can be a user equipment (UE). Among them, the UE includes a handheld device, a vehicle-mounted device, a wearable device, or a computing device with wireless communication functions. Exemplarily, the UE can be a mobile phone, a tablet computer, or a computer with wireless transceiver functions, etc. In addition, the terminal device can also be a device that can support the terminal to implement this function, such as a chip or a chip system, and this device can be installed in the terminal. In the technical solutions provided by the embodiments of the present application, the device used to implement the functions of the terminal is taken as an example of the terminal to describe the technical solutions provided by the embodiments of the present application. It should be understood that the terminal is a general term, including the most common mobile phones, CPEs, integrated access backhaul (IAB) terminals. 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 a smart grid, a wireless terminal in a smart city, a wireless terminal in a smart home, and so on.

[0135] In the embodiments of the present application, the device for implementing the functions of the terminal device may be the terminal device itself, or a device capable of supporting the terminal device to implement such functions, such as a chip system or a chip, and this device may be installed in the terminal device. In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices.

[0136] The network devices involved in the embodiments of the present application include a base station (BS), which may be a device deployed in a radio access network capable of wireless communication with a terminal. Among them, the base station may have various forms. For example, macro base stations, micro base stations, relay stations, access points, backhaul stations, etc. Exemplarily, the base stations involved in the embodiments of the present application may be base stations in 5G or base stations in LTE. Among them, the base stations in 5G may also be referred to as transmission reception points (TRPs) or next generation nodes (gNBs). In the embodiments of the present application, the device for implementing the functions of the network device may be the network device itself; or a device capable of supporting the network device to implement such functions, such as a chip or a chip system, and this device may be installed in the network device. In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices. In the technical solutions provided in the embodiments of the present application, taking the device for implementing the functions of the network device as the network device, and taking the network device as a base station as an example, the technical solutions provided in the embodiments of the present application are described.

[0137] Figure 1 It is an exemplary architecture diagram of a communication system 100 according to an embodiment of the present application. The method in the embodiments of the present application can be applied to Figure 1 the communication system 100 shown. It should be understood that the communication system 100 to which the method of the embodiments of the present application can be applied may include more or fewer network devices, terminal devices, or core network devices. Figure 1 The network devices, terminal devices, or core networks in it may be hardware, or software functionally divided, or a combination of the above two. Figure 1 The network devices and terminal devices, and between the network devices and the core network, may communicate through other devices or network elements.

[0138] Figure 1In the communication system 100 shown, the core network 120, the network device 110, and the terminal devices 101 to 106 form a communication system 100 in a stand-alone (SA) scenario. In this communication system 100, the network device 110 can send downlink data to the terminal devices 101 to 106. Of course, the terminal devices 101 to 106 can also send uplink data to the network device 110. The network device 110 and the core network 120 can be connected and data can be transmitted through a transmission network.

[0139] In the SA scenario, the terminal devices in the communication system 100 are connected to a single network device, and the network device to which the terminal device is connected and the core network to which the network device is connected are of the same standard. For example, the core network is a 5G core network, and the corresponding network device is a 5G base station, and the 5G base station is directly connected to the 5G core network; or the core network is a 6G core network, and the corresponding network device is a 6G base station, and the 6G base station is directly connected to the 6G core network.

[0140] It should be understood that the terminal devices 101 to 106 can be, for example, cellular phones, smart phones, portable computers, handheld communication devices, handheld computing devices, satellite radio devices, global positioning systems, drone terminals, and / or any other suitable devices for communicating on the wireless communication system 100. In addition, the terminal devices 104 to 106 can also form a communication system. In this communication system, the terminal device 105 can send downlink data to the terminal device 104 or the terminal device 106.

[0141] Figure 2 It is an exemplary architecture diagram of the communication system 200 according to another embodiment of the present application. The method in the embodiment of the present application can be applied to Figure 2 the communication system 200 shown. It should be understood that the communication system 200 to which the method of the embodiment of the present application can be applied may include more or fewer network devices, terminal devices, or core network devices. Figure 2 The network device, terminal device, or core network in [[ ]] can be hardware, software functionally divided, or a combination of the two above. Figure 2 The network device and the terminal device, as well as the network device and the core network in [[ ]] can communicate through other devices or network elements.

[0142] Figure 2In the communication system 200 shown, the core network 220, the network device 210, and the terminal devices 204 to 206 form a communication system 200 in a dual connectivity (DC) scenario. In this communication system 200, the network device 210 can send downlink data to the terminal devices 204 to 206. Of course, the terminal devices 204 to 206 can also send uplink data to the network device 210. The network device 210 and the core network 220 can be connected and data can be transmitted through a transmission network.

[0143] In the DC scenario, the terminal device is simultaneously connected to network devices of different or the same radio access technology (RAT), which is applicable to connected UEs. For example, when the core network is a 5G core network, the terminal device can be simultaneously connected to a network device 211 (such as a 5G base station) and a network device 216 (such as a 6G base station), where the 5G base station is the master station and the 6G base station is the secondary station; for another example, when the core network is a 6G core network, the terminal device can be simultaneously connected to a network device 211 (such as a 5G base station) and a network device 216 (such as a 6G base station), where the 6G base station is the master station and the 5G base station is the secondary station; for yet another example, when the core network is a 6G core network, the terminal device can be simultaneously connected to two 6G base stations, that is, both the master station and the secondary station are 6G base stations.

[0144] It should be understood that the terminal devices 204 to 206 can be, for example, cellular phones, smartphones, portable computers, handheld communication devices, handheld computing devices, satellite radio devices, global positioning systems, drone terminals, and / or any other suitable devices for communicating on the wireless communication system 100. In addition, the terminal devices 204 to 206 can also form a communication system. In this communication system, the terminal device 205 can send downlink data to the terminal device 204 or the terminal device 206.

[0145] It should be understood that the network architecture shown above is only an exemplary illustration, and the communication system applicable to the embodiments of the present application is not limited thereto. Any communication that can implement the functions of the above-mentioned network elements is applicable to the embodiments of the present application. Exemplarily, Figure 1 and Figure 2The network architecture shown may include a greater number and more types of terminal devices and network devices. Additionally, by way of example, the communication system of the embodiments of the present application may also be a non-terrestrial network (NTN) communication system, such as a satellite communication network, a high altitude platform station (HAPS), and an air-to-ground network, etc. For example, a satellite communication system may include satellites where terminal devices communicate with ground base stations. Among them, the satellite may refer to non-ground base stations or non-ground devices such as unmanned aerial vehicles, hot air balloons, low-earth orbit satellites, medium-earth orbit satellites, and geostationary orbit satellites. The NTN communication system can be deployed independently or as a supplement to the ground network.

[0146] It should also be understood that the above naming is only defined for the convenience of distinguishing different functions and should not constitute any limitation to the present application. The present application does not exclude the possibility of using other naming in 6G networks and future other networks.

[0147] The working process and existing technical problems of existing communication devices after waking up will be described below.

[0148] With the development of communication technology, the communication network has higher and higher requirements for the capabilities of communication devices such as terminal devices or network devices. For example, the improvement of network capabilities requires higher rates for communication devices; diverse applications require various forms of communication devices, such as the terminal device forms involved in applications like smart phones, VR / AR, unmanned aerial vehicles, autonomous driving, and wearable devices; communication devices need to support more frequency bands, larger bandwidths, etc. As the requirements for the capabilities of communication devices increase, the hardware of communication devices will increase accordingly, and the power consumption of communication devices will inevitably increase. For example, in typical services (such as comprehensive web browsing, instant messaging, games, videos, etc.), the average increase in communication power consumption of terminal devices reaches more than 200%. The persistent battery life of communication devices is an important aspect of the user experience and will affect the use of the services of terminal devices. Therefore, the persistent battery life of communication devices faces great challenges, and how to save the power consumption of communication devices is the key to solving this problem.

[0149] In release 18 of the 5th generation (5G) mobile communication system, research on the low power wake up signal (LP WUS) has been carried out to evaluate the potential of communication devices equipped with low power wake up radio (LP WUR) to reduce power consumption. Generally speaking, a communication device will consume dozens of milliwatts of power even when it does not send or receive any data. This idle power consumption is due to the fact that the communication device must regularly measure and detect potential paging messages. If the communication device detects the LP WUS signal, it will continue to decode the paging message and wake up from the sleep state to the active state to work, otherwise it will return to the sleep state and wait for the next time to receive the LP WUS signal. The LP-WUS signal is very similar to the wake up signal (WUS), and the WUS is sent based on the traditional Zadoff-Chu sequence and the downlink control information (DCI) in the Format 2-6 format of the physical data control channel (PDCCH).

[0150] Figure 3 The schematic diagram of the process of a communication device waking up from the sleep state to the active state to work on the time-frequency resource is shown. Figure 3 Figure (a) in it shows the process of a communication device waking up from the sleep state to the active state to work at the current stage.

[0151] First, the communication device receives the WUS signal and then wakes up from the sleep state to the active state. This WUS signal can be the LP WUS signal mentioned above. Secondly, when working in the active state, the communication device sends one or more SSBs for time-frequency domain synchronization. Then the communication device (such as a terminal device) receives DCI from another communication device (such as a network device). Finally, the communication device receives the channel state information-reference signal (CSI-RS) and the data in the channel, as well as feedbacks the channel state information (CSI) and the data decoding result.

[0152] It should be understood that CSI may include a CSI resource index, a rank indicator (RI), a channel quality indicator (CQI), etc. Among them, in order to reduce the number of bits of feedback, the network device may select one or more optimal CQIs in the subband CQIs for reporting. Optionally, the CSI may further include a precoding matrix indicator (PMI). Among them, the PMI can be used to feedback the precoding matrix when the pilot signal power difference is 0, and can also reduce the bit overhead of feedback.

[0153] It should be noted that Figure 3 The workflow shown is only an example. The wake-up signal received in the workflow of the communication device may also be other types of wake-up signals, and the reference signal for determining the channel state information may also be other reference signals such as the demodulation reference signal (DMRS). This application does not exclude the possibility of using other types of signals in the 6G network and other future networks. For the convenience of describing the solution, this application takes Figure 3 the 5G network shown as an example to introduce the embodiments.

[0154] It should be understood that in a wireless communication system, data or information can be carried by time-frequency resources. Among them, the time-frequency resources can include resources in the time domain and resources in the frequency domain. Among them, the resources in the time domain can include one or more time-domain units. A time-domain unit can be a symbol, or a mini-slot, or a slot, or a transmission time interval (TTI), or a subframe. Among them, the duration of a subframe in the time domain can be 1 millisecond (ms), a slot consists of 14 symbols, and a mini-slot can include at least one symbol (for example, 2 symbols or 7 symbols or 14 symbols, or any number of symbols less than or equal to 14 symbols). In the embodiments of this application, "data" or "information" can be understood as the bits generated after the information block is encoded, or "data" or "information" can also be understood as the modulation symbols generated after the information block is encoded and modulated.

[0155] Exemplarily, taking Figure 3 the workflow shown in (a) and the communication device being a terminal device as an example, the working process of the terminal device in the active state will be specifically introduced. As Figure 3As shown in (a) therein, the terminal device can perform the above workflow in different time-frequency resources such as transmission time interval (TTI), slot, and symbol.

[0156] For example, the terminal device can receive DCI sent by the network device in slot 1. The DCI can include indication information for indicating the time-domain position of the CSI-RS and downlink data received by the terminal device from the network device, and can also include indication information for indicating the time-domain position when the terminal device feeds back CSI and data decoding results to the network device through uplink information.

[0157] For another example, the terminal device can receive at least one CSI-RS in slot 2, slot 3, and possibly multiple slots. Then, the terminal device can obtain the channel state information of the downlink channel between the network device and the terminal device by measuring the CSI-RS, such as the precoding matrix, channel quality information, etc. This channel state information can be used for scheduling and link adaptation of the network device. Moreover, the terminal device can feed back the measured channel state information of the downlink channel to the network device through the physical uplink control channel (PUCCH) in at least one slot such as slot n2. The time-domain positions of the terminal device receiving the CSI-RS and feeding back the CSI can be indicated by the above DCI.

[0158] For another example, the terminal device can receive downlink data from the network device through the physical downlink shared channel (PDSCH) in slot n1, and can feed back the decoding result of the downlink data to the network device through the PUCCH in at least one other slot. The time-domain positions of the terminal device receiving the downlink data and feeding back the decoding result can be indicated by the above DCI.

[0159] Figure 3 The workflow shown in (a) therein can also be applied to the network device. For example, the terminal device sends a WUS signal to the network device to wake the network device from the sleep state to the active state. At this time, Figure 3 the PDSCH shown in (a) therein will be replaced by the physical uplink shared channel (PUSCH), the PUCCH will be replaced by the physical downlink control channel (PDCCH), the network device receives DCI from the terminal device, and the measured CSI is the CSI of the uplink channel. The remaining workflow can refer to the above description and will not be elaborated here.

[0160] However, when a communication device in the connected state wakes up from the dormant state to the active state for operation, due to outdated channel information, the communication device needs to re-measure the channel information. Or, due to the movement of the user of the communication device such as a terminal device, it may cause uplink and downlink beam misalignment. Or, due to synchronization timeout, the communication device needs to re-transmit a synchronization signal / PBCH block (SSB) for time-frequency domain synchronization, etc. At this time, the communication device needs to perform steps such as re-synchronization, channel measurement, and measurement feedback, that is Figure 3 all the working processes in the active state shown in (a) of

[0161] such as Figure 3 shown in (a) of , there is a time interval or latency between when the terminal device receives the CSI-RS and when it receives the downlink data. Similarly, there is a time interval or latency between receiving the downlink data and feeding back the CSI and decoding results. Or possibly, there is a time interval or latency between when the terminal device receives one CSI-RS and when it receives another CSI-RS. Therefore, these latencies will cause the communication device to take a relatively long time to re-perform all the working processes in the active state, with high latencies in measuring the CSI-RS, receiving data, and feeding back the CSI and decoding results, ultimately resulting in the communication device being unable to timely feedback channel changes in the above scenarios.

[0162] To solve the above technical problems, a communication method provided in this application can shorten the latency for a communication device to obtain channel information and promptly use it for data transmission. The following will combine with the accompanying drawings Figures 3 to 11 to describe the embodiments of this communication method.

[0163] Embodiment 1:

[0164] Taking the communication device as a terminal device as an example, Figure 3 (b) of shows a schematic diagram of the communication method provided in this application. As Figure 3 shown in (b) of , after receiving the WUS signal, the terminal device enters the active state for operation. After receiving the DCI from the network device in slot 1, the terminal device receives the CSI-RS and downlink data in slot 2, and sends the CSI and the decoding result of the downlink data to the network device through the same uplink information.

[0165] In other words, in the communication method provided in this application, the time domain positions where the terminal device receives the CSI-RS and the downlink data are in the same time domain unit, such as the same TTI or Figure 3in the same time slot or the same symbol as shown in (b). And preferably, there is no time interval or time delay between the time domain positions of receiving CSI-RS and downlink data. In addition, the terminal device feeds back the decoding results of CSI and downlink data to the network device through an uplink message. In this way, the time delay of the entire workflow for the communication device to obtain CSI and downlink data and feed back the decoding results of CSI and downlink data can be shortened, thereby quickly feeding back channel changes.

[0166] Optionally, in order to further shorten the time delay of the above workflow, an embodiment of the present application may also be a numerology configuration with a relatively large subcarrier spacing in the frequency domain. For example, the subcarrier spacing SCS of CSI-RS is 120 KHz. At this time, the length of each time slot is 0.125 ms, thereby further shortening the time delay of the terminal device for the above workflow.

[0167] Exemplarily, taking Figure 3 the example of being in the same time slot as shown in (b). Time slot 2 may include 14 symbols. Among them, the communication device may receive CSI-RS in the first k symbols, and may start receiving data from another communication device after the j-th symbol, where k is a positive integer and j is a positive integer greater than k. Preferably, in the embodiment of the present application, the value of j may be k + 1. In this way, there is no time interval or time delay between the communication device receiving CSI-RS and receiving data, or in other words, it immediately receives downlink data after receiving CSI-RS.

[0168] Exemplarily, Figure 4 shows a schematic diagram of a time-frequency resource of the communication method of the present application, where Figure 4 taking the communication device as the terminal device as an example to introduce the determination of time-frequency resources. As Figure 4 shown in (a), the terminal device may receive CSI-RS and receive downlink data in time slot 1, and feedback the decoding results of CSI and downlink data through PUCCH in the subsequent time slot m1, that is, the processes of receiving and feedback of the terminal device are in different time domain units. As Figure 4 shown in (b), the terminal device may receive CSI-RS and receive downlink data in time slot m2, and feedback the decoding results of CSI and downlink data through PUCCH in time slot m2, that is, the processes of receiving and feedback of the terminal device are in the same time domain unit such as Figure 4 the time slot or the TTI or symbol mentioned above, and preferably, there is no time interval or time delay between the processes of receiving and feedback.

[0169] Exemplarily, Figure 5 shows another schematic diagram of a time-frequency resource of the communication method of the present application, where Figure 5Taking a communication device as an example of a terminal device, the determination of time-frequency resources is introduced. For example, Figure 5 as shown in (a) of , the terminal device can receive a CSI-RS once and receive downlink data once in time slot m2, where the time domain positions of receiving a CSI-RS once and receiving downlink data once can be located in one or more symbols in time slot m2. For example, Figure 5 as shown in (b) of , the terminal device can receive the CSI-RS two or more times continuously and receive downlink data once in time slot m2. In this way, in the case where the terminal device cannot obtain the CSI by measuring the CSI-RS once, the complete CSI can be obtained by receiving and measuring the CSI-RS multiple times. For example, Figure 5 as shown in (c) of , the terminal device can receive the CSI-RS two or more times and receive the downlink data two or more times in time slot m2. For example, the terminal device can first receive and measure the CSI-RS once, then receive some downlink data with lower importance from the network device, then receive and measure the CSI-RS once again to obtain the complete CSI, and finally receive the remaining downlink data from the network device. Preferably, in the embodiments of the present application, the terminal device receives the downlink data from the network device after determining the CSI, or in other words, the time domain position of the CSI-RS in the time domain unit is before the time domain position of the downlink data in the time domain unit.

[0170] In other words, the time domain positions of the terminal device receiving the CSI-RS and the downlink data can be in different positions in the same time domain unit, such as different symbols in the same time slot, and the number of times of receiving the CSI-RS and the downlink data can also be one or more times. For example, Figure 5 as shown in (d) of , the time domain positions of the terminal device receiving the CSI-RS and the downlink data can also be in the same position in the same time domain unit. At this time, the frequency domain positions of the terminal device receiving the CSI-RS and the downlink data are different, and the distribution of the frequency domain positions can be in the form of frequency-division multiplexing (FDM) or code division multiplexing (CDM).

[0171] Specifically, Figure 5The frequency-domain position distribution shown in (d) in [it] is in the FDM form, that is, the carrier bandwidth is divided into sub-channels of two different frequency bands, which are respectively used to receive CSI-RS and downlink data. Optionally, in another embodiment of the present application, the CDM form may be that sub-channels for receiving multiple CSI-RS and sub-channels for receiving downlink data are interleaved in the frequency band. For example, the carrier bandwidth may be divided into sub-channels of 8 different frequency bands, arranged in the order of frequency division as sub-channel #1 to sub-channel #8, where sub-channel #1, sub-channel #3, sub-channel #5, and sub-channel #7 may be used to receive CSI-RS, and sub-channel #2, sub-channel #4, sub-channel #6, and sub-channel #8 may be used to receive downlink data.

[0172] Figure 6 FIG. shows a schematic interaction flow diagram of a communication method 600 provided by an embodiment of the present application. Figure 7 FIG. shows a schematic interaction flow diagram of a communication method 700 provided by an embodiment of the present application. Among them, the communication method 600 includes steps S610 to S650, which are used to enable a communication device to determine decoding results of CSI and data. In the communication methods 600 and 700, information is exchanged between a first communication device and a second communication device. The first communication device may be a terminal device, and the second communication device may be a network device. Alternatively, the first communication device may be a network device, and the second communication device may be a terminal device.

[0173] S610, the second communication device determines a first time-frequency resource.

[0174] It should be understood that the second communication device determines the time-domain position and / or frequency-domain position when sending a first reference signal and first data to the first communication device through step 610. In other words, this step is actively determined by the second communication device, and the first time-frequency resource carries the first reference signal and the first data.

[0175] In an embodiment of the present application, the first time-frequency resource may be a TTI, a time slot, or a symbol as mentioned above, or the first time-frequency resource is included in a TTI, a time slot, or a symbol.

[0176] S620, the second communication device sends first indication information to the first communication device.

[0177] Correspondingly, the first communication device receives first indication information from the second communication device. The first indication information is used to indicate the time domain position and / or frequency domain position of the second communication device for transmitting the first reference signal on the first time-frequency resource, and the time domain position and / or frequency domain position for transmitting the first data. Or rather, the first indication information is used to indicate the time domain position and / or frequency domain position of the first communication device for receiving the first reference signal on the first time-frequency resource, and the time domain position and / or frequency domain position for receiving the first data.

[0178] Optionally, the first indication information may be included in Figure 3 the DCI shown in the figure. Further, step S620 may be that the second communication device sends DCI to the first communication device, and the DCI includes the first indication information. In some other embodiments of this application, the first indication information may also be included in radio resource control (RRC) signaling.

[0179] For example, the DCI may indicate the time domain position of the downlink data on the first time-frequency resource through the K0 value. K0 is the slot offset between the first communication device receiving the DCI and scheduling the PDSCH, or rather, receiving the first data. The DCI may indicate the time domain position of the first reference signal such as CSI-RS on the first time domain resource through the K0+offset value. When the value of offset is 0, CSI-RS and PDSCH multiplex the same time domain unit resource and are in different frequency domain resources. When the value of offset is greater than 0 or less than 0, the time domain position of CSI-RS is before or after the time domain position of PDSCH.

[0180] S630, the first communication device determines the first time-frequency resource.

[0181] Specifically, the first communication device determines the first time-frequency resource according to the first indication information in step S620. Or rather, the first communication device determines the time domain position and / or frequency domain position of receiving the first reference signal on the first time-frequency resource, and the time domain position and / or frequency domain position of receiving the first data.

[0182] S640, the second communication device transmits the first reference signal and the first data on the first time-frequency resource.

[0183] Correspondingly, the first communication device receives the first reference signal and the first data on the first time-frequency resource.

[0184] The first reference signal is used to determine the channel state information CSI. The first reference signal may be the CSI-RS mentioned above, or may be other reference signals for determining channel information such as DMRS. This application does not limit the type of the first reference signal.

[0185] When the second communication device is a terminal device and the first communication device is a network device, the first data may be uplink data; when the second communication device is a network device and the first communication device is a terminal device, the first data may be downlink data.

[0186] S650, the first communication device determines the decoding result of the CSI and the first data.

[0187] Among them, the first communication device determines the CSI according to the first reference signal. For example, the CSI of the uplink channel or the downlink channel is obtained by measuring the CSI-RS. The decoding result of the first data may be ACK, and the value of ACK can be used to indicate whether the decoding result is correct. For example, when ACK = 0, it represents that the decoding result of the first data is correct, and when ACK = 1, it represents that the decoding result of the first data is incorrect.

[0188] The communication method 700 includes steps S710 to S740, which are used to enable the communication device to feedback the decoding result of the CSI and the data.

[0189] S710, the second communication device determines the second time-frequency resource.

[0190] Among them, the second time-frequency resource is used to carry the first information, and the first information includes the CSI and the decoding result of the first data fed back by the first communication device to the second communication device. When the second communication device is a terminal device, the first information may be downlink information; when the second communication device is a network device, the first information may be uplink information.

[0191] Optionally, as shown in (a) of Figure 4 , the second time-frequency resource may be separated from the first time-frequency resource by one or more time domain units, or in other words, the first time-domain resource and the second time-frequency resource are not continuous in the time domain position; as shown in (b) of Figure 4 , the second time-frequency resource may also be the same as the first time-domain resource, for example, the same time slot m2.

[0192] S720, the second communication device sends the second indication information to the first communication device.

[0193] Correspondingly, the first communication device receives the second indication information from the second communication device.

[0194] Among them, the second indication information is used to indicate the time domain position and / or the frequency domain position of the second communication device receiving the decoding result of the CSI and the first data on the second time-frequency resource, or in other words, the second indication information is used to indicate the time domain position and / or the frequency domain position of the first communication device sending the decoding result of the CSI and the first data on the second time-frequency resource.

[0195] Optionally, the second indication information may be included inFigure 3 In the DCI shown. Further, step S720 may be that the second communication device sends DCI to the first communication device, and the DCI includes second indication information. In some other embodiments of the present application, the second indication information may also be included in radio resource control (RRC) signaling.

[0196] For example, the second indication information may include identification information of hybrid automatic repeat request acknowledgement HARQ-ACK, and the ID of HARQ-ACK may be used to indicate the time domain position for the first communication device to feedback CSI.

[0197] For another example, the DCI may indicate the time domain position on the first time-frequency resource when the communication device feedbacks the decoding results of CSI and the first data through the value of K0+offset+K1. K0 is the slot offset between the communication device receiving the DCI and receiving the first data, and K1 is the slot offset between the first communication device receiving the first data and scheduling the channel resource for feedback data. When the value of offset is 0, the time domain position for the communication device to feedback the decoding results of CSI and the first data is the time domain position when scheduling the channel resource. When the value of offset is greater than 0, the time domain position for feedbacking the decoding results of CSI and the first data is after the time domain position of the scheduled channel resource.

[0198] S730, the first communication device determines the second time-frequency resource.

[0199] Specifically, the first communication device determines the second frequency domain resource according to the second indication information, or determines the time domain position and / or frequency domain position of sending the first information including the decoding results of CSI and the first data on the second frequency domain resource.

[0200] S740, the first communication device sends the decoding results of CSI and the first data on the second time-frequency resource.

[0201] Specifically, the second communication device receives the decoding results of CSI and the first data on the second time-frequency resource. For example, when the second communication device is a network device such as a base station, the network device may adaptively optimize the scheduling process according to the received channel quality information during the downlink scheduling process. The decoding results of CSI and the first data may be carried in the first information. When the first communication device is a terminal device, the first information may be an uplink information; when the first communication device is a network device, the first information may be a downlink information.

[0202] In the technical solution shown in Embodiment 1, by sending the first reference signal and the first data from the second communication device to the first communication device on the first time-frequency resource such as a TTI or a slot or a symbol, it greatly reduces Figure 3The total delay in obtaining CSI and data in the shown workflow. In addition, by receiving the CSI and the decoding result of the first data fed back by the first communication device simultaneously on the second time-frequency resource, the Figure 3 feedback delay in the shown workflow is greatly reduced.

[0203] Optionally, Figure 3 the workflow shown in (b) of Figure 3 can be used only after being triggered and activated by a communication device, or it can be used without being triggered. For example, when the time domain position and / or frequency domain position of the first reference signal and the first data are configured in the DCI that the second communication device needs to send, the first communication device and the second communication device can default to use the Figure 3 workflow shown in (b) of

[0204] Optionally, in some other embodiments of the present application, Figure 3 the working mode shown in (a) of Figure 3 can be switched with the working mode shown in (b) of Figure 3 For example, after the second communication device receives feedback and confirms the channel change through the Figure 3 working mode shown in (b) of

[0205] Embodiment 2:

[0206] Different from Embodiment 1, in Embodiment 2, the first time-frequency resource is also used to carry a second reference signal, and this second reference signal is used to demodulate the channel for transmitting or receiving the first data. In the embodiments of the present application, the second reference signal may be a demodulation reference signal DMRS.

[0207] Figure 8 shows the relationship of the time domain positions of the first reference signal, the second reference signal, and the first data in the first time-frequency resource provided by the embodiments of the present application. Among them, for the convenience of description, the case where the first reference signal is CSI-RS, the second reference signal is DMRS, and the first data is downlink data transmitted by PDSCH is taken as an example.

[0208] As Figure 8As shown in (a) of [Figure / Illustration], the time domain position of the CSI-RS can be before the time domain position of the DMRS. For example, both the DMRS and the CSI-RS can be configured at the positions of the first few symbols in time slot i1. Then, after the communication device measures the CSI-RS to obtain the CSI and demodulates the PDSCH through the DMRS, it transmits the first data or the downlink data through the PDSCH. In other words, preferably, the time domain positions of the DMRS and the CSI-RS in the first time-frequency resource are before the time domain position of the first data in the first time-frequency resource.

[0209] As Figure 8 shown in (b) of [Figure / Illustration], the time domain position of the CSI-RS can be before the time domain position of the DMRS and before the time domain position of the downlink data. For example, both the DMRS and the CSI-RS can be configured at the positions of the first few symbols in time slot i2.

[0210] In the embodiments of the present application, the time domain position of the CSI-RS can be the same as the time domain position of the DMRS. At this time, the frequency domain positions of the CSI-RS and the DMRS are different. As Figure 8 shown in (c) of [Figure / Illustration], the frequency domain positions of the CSI-RS and the DMRS have a form of frequency division multiplexing (FDM), that is, the carrier bandwidth is divided into two sub-channels with different frequency bands, which are respectively used to receive the CSI-RS and the DMRS. As Figure 8 shown in (d) of [Figure / Illustration], the frequency domain positions of the CSI-RS and the DMRS have a form of code division multiplexing (CDM), that is, the carrier bandwidth is divided into four sub-channels with different frequency bands, and the sub-channel for receiving the CSI-RS and the sub-channel for receiving the DMRS are interleaved in the frequency band. It should be noted that Figure 8 (c) and (d) of [Figure / Illustration] are only examples, and the carrier frequency band can also be divided into more sub-channels.

[0211] In Embodiment 1, the communication device can determine the CSI through the first port for measuring the first reference signal. At this time, the feedback process of the CSI is also to report the measurement result of the first port. In Embodiment 2, the measurement result can be reported based on the association between the first port and the second port, where the second port can be a port for estimating channel information based on the second reference signal for demodulating the channel.

[0212] Figure 9 shows a schematic diagram of the corresponding relationship between the first port and the second port. As Figure 9As shown, the first port port1000 and the second port port3000 are located at the same frequency domain position and have similar time domain positions. The first port port1001 and the second port port3001 are located at the same frequency domain position and have similar time domain positions. Therefore, it can be determined that the channel information measurement results of port1000 and port3000 are similar, and the channel information measurement results of port1001 and port3001 are similar. Finally, the corresponding relationship between port1000 corresponding to port3000 and port1001 corresponding to port3001 is determined. When the communication device needs the channel information measurement results of the four ports of the second ports port3000 to port3003, the channel information measurement results of the four ports of port3000 to port3003 can be obtained by measuring the four ports of port1000, port1001, port3002, and port3003.

[0213] In other words, each first port and the corresponding second port are at the same frequency domain position and at different time domain positions. In Embodiment 2, the communication device can determine the measurement results of (K1 + K2) first ports according to K1 first ports, K2 second ports, and the corresponding relationship, where the K2 second ports correspond to the K2 first ports, and K1 and K2 are integers. For example, K1 or K2 can be 0, that is, the embodiments of the present application can directly measure multiple second ports and use the channel information measurement results of the multiple second ports as the channel information measurement results of the corresponding multiple first ports. The channel information measurement results are used to determine the CSI, or the embodiments of the present application can directly measure multiple first ports and use the channel information measurement results of the multiple first ports as the channel information measurement results of the corresponding multiple second ports. The channel information measurement results are used to demodulate the channel for transmitting the first data.

[0214] Optionally, the power deviation between the first port and the second port can be determined by the frequency domain density difference between the first reference signal such as CSI-RS and the second reference signal such as DMRS. For example, the embodiments of the present application provide Table 1, which is used to indicate the corresponding relationship between the power deviation of the two reference signals and the frequency domain arrangement. As shown in Table 1, when the frequency domain densities of the first reference signal and the second reference signal are the same, it corresponds to the type1 type in the table, that is, the actual power difference between the first reference signal and the second reference signal is 0; when the frequency domain density difference between the first reference signal and the second reference signal is doubled, it corresponds to the type2 type in the table. At this time, the actual power difference between the two reference signals is 3 dB.

[0215] Table 1

[0216] Degree of difference in frequency domain density Type1 Type2 …… Power difference 0 3dB ……

[0217] It should be noted that more types can also be included in Table 1. For example, the frequency-domain densities of the two reference signals can differ by more multiples, corresponding to more categories, and further corresponding to a higher actual power difference. This comparison in this article is not limited.

[0218] Embodiment 3:

[0219] From Embodiment 2, it can be obtained that in Figure 6 and Figure 7 In the shown interaction process, the first communication device can measure the first reference signal through the first port to obtain channel information to determine the CSI, and can estimate the channel information through the second port to demodulate the channel for transmitting the first data. The number of the first port and the second port affects the delay of the first communication device in obtaining the channel information.

[0220] Figure 10 The schematic diagram showing the change in the number of ports of the communication device is shown. Figure 10 (a) in shows the current port configuration method of the communication device, that is, the communication device always uses the same number of ports to measure the channel. The embodiment of the present application shows a method for adjusting the number of measurement ports of the communication device, that is, the first communication device can adjust the number of the first port or the second port used for measuring the channel according to the decoding result of the first data obtained in step S650.

[0221] It should be understood that the adjusted first port or second port is used for the next working process of the communication device, that is, when the communication device re-performs a working process as Figure 3 shown, the adjusted first port or second port is used to measure the channel.

[0222] As Figure 10 (b) in shows, ACK = 0 means that the decoding result of the first data is correct. At this time, the first communication device can gradually increase the number of the first port or the second port, for example, from 1 port to 2 ports, and then from 2 ports to 4 ports. Gradually increasing the number of measurement ports can reduce the processing delay and resource configuration overhead, and at the same time, the feedback overhead is also small. In the embodiment of the present application, the number of the first port or the second port can also be increased to 8 ports or more, but correspondingly, the delay of measuring the channel will gradually increase. Similarly, as Figure 10 (c) in shows, ACK = 1 means that the decoding result of the first data is incorrect. At this time, the first communication device can gradually reduce or keep unchanged the number of the first port or the second port, for example, reducing from 2 ports to 1 port, or remaining 2 ports.

[0223] Optionally, embodiments of the present application may configure multiple measurement resources or multiple time-frequency resources for reference signals, where the multiple measurement resources respectively correspond to different numbers of ports. Furthermore, the first communication device may adjust the measurement resources of the first reference signal or the second reference signal to adjust the number of the first port or the second port. For example, the DCI received by the first communication device indicates that in symbol x1, the first communication device measures channel information through 1 port, in symbol x2, the first communication device measures channel information through 2 ports, and in symbol x3, the first communication device measures channel information through 4 ports. Furthermore, as shown in (b) of Figure 10 when ACK = 0, the first communication device may adjust the measurement resources or time-frequency resources of the first reference signal from symbol x1 to symbol x2, or switch from symbol x1 to symbol x2, so that the number of the first ports used in the next workflow of the first communication device is adjusted from 1 port to 2 ports. Similarly, the first communication device adjusts the measurement resources or time-frequency resources of the first reference signal from symbol x3 to symbol x2, so that the number of the first ports used in the next workflow of the first communication device is adjusted from 4 ports to 2 ports.

[0224] It should be noted that the above method of indicating multiple measurement resources or multiple time-frequency resources by DCI is only an example, and the present application does not limit the indication method for multiple measurement resources or multiple time-frequency resources. For example, multiple measurement resources or multiple time-frequency resources may also be indicated by predefined rules.

[0225] Embodiment 4:

[0226] Figure 11 shows a schematic diagram of beam scanning provided by an embodiment of the present application, where Figure 11 taking the communication device as a terminal device as an example. In the Figure 3 workflow of the embodiment of the present application shown in (b), a narrow beam may be used for beam scanning on the measurement resources or time-frequency resources of the first reference signal such as CSI-RS, and a wide beam may be used for beam scanning on the time-frequency resources of the first data, so as to ensure the data transmission quality. For example, as shown in Figure 11 the terminal device measures CSI-RS four times on four time-domain resources CSI-RS#1 to CSI-RS#4 respectively. At this time, the communication device may perform beam scanning on these four time-domain resources through a narrow beam respectively, and perform beam scanning on the time-domain resources for scheduling PDSCH through a wide beam, so as to obtain multiple beam scanning results.

[0227] Optionally, during the beam scanning process, the number of the first ports used by the communication device on the above four time-domain resources CSI-RS#1 to CSI-RS#4 is fixed at 1, because the result of beam scanning is not accurate enough at this time, and using too many first ports will waste port resources.

[0228] Optionally, the above four time-domain resources CSI-RS#1 to CSI-RS#4 may all be included in 1 symbol, but are distributed in four different symbols. In this way, it can be ensured that the time-domain positions of different time-domain resources do not overlap, and the feedback overhead is small. For example, the starting time slots of the four time-domain resources are the same, and four different offset values are respectively indicated in the DCI received by the communication device, so that the time-domain positions of the four time-domain resources do not overlap.

[0229] After obtaining multiple beam scanning results, the communication device needs to report or feedback the beam scanning results through uplink information or downlink information, and the process is similar to the process of feedbacking the decoding results of CSI and the first data as described above. However, since the communication device also needs to feedback the decoding results of CSI and the first data through an uplink information or a downlink information at the same time, the channel resources are limited at this time, and it may not be possible to complete the reporting of the beam scanning results at one time, and an additional one or more uplink information or downlink information are needed to feedback the beam scanning results.

[0230] Therefore, as Figure 11 shown, taking the communication device as the terminal device as an example, the beam scanning results can be feedbacked by configuring at least two uplink information or at least two PUCCHs. For example, for the above four time-domain resources CSI-RS#1 to CSI-RS#4, the same K1 value can be configured, so that the results obtained by beam scanning on the above four time-domain resources can be reported through four different time-domain positions of the same PUCCH, and the first information can be reported through another PUCCH. For the above four time-domain resources CSI-RS#1 to CSI-RS#4, different K1 values can also be configured, and the different K1 values correspond to different uplink information or PUCCHs one by one. As Figure 11 shown, two different K1 values can be configured. The time-domain resources CSI-RS#1 and CSI-RS#2 correspond to one K1, and then the results obtained by beam scanning on the time-domain resources CSI-RS#1 and CSI-RS#2 are reported or feedbacked through PUCCH#1; the time-domain resources CSI-RS#3 and CSI-RS#4 correspond to another K1, and then the results obtained by beam scanning on the time-domain resources CSI-RS#3 and CSI-RS#4 are reported or feedbacked through PUCCH#2.

[0231] It should be noted thatFigure 11 As an example only, Figure 11 the first reference signal in Figure 11 , such as CSI-RS, can also be replaced with a second reference signal, such as DMRS. Embodiments of the present application may include a greater number of time domain resources for measuring the first reference signal or the second reference signal, as well as a greater number of uplink information or downlink information for reporting and feedback.

[0232] As described above in conjunction with Figures 3 - 11 the communication method provided by the embodiments of the present application has been introduced in detail. Below, in conjunction with Figures 12 - 14 the communication device provided by the embodiments of the present application will be introduced in detail, which is used to implement Figures 3 - 11 the communication method shown in Figures 3 - 11 . It should be understood that the description of the device embodiments corresponds to the description of the method embodiments. Therefore, for the content not described in detail, reference may be made to the above method embodiments. For the sake of brevity, some content will not be repeated.

[0233] Figure 12 FIG. Figure 12 is a schematic block diagram of a communication device provided by an embodiment of the present application. The device 1200 includes a transceiver unit 1210, and the transceiver unit 1210 can be used to implement corresponding communication functions. The transceiver unit 1210 may also be referred to as a communication interface or a communication unit.

[0234] Optionally, the device 1200 may further include a processing unit 1220, and the processing unit 1220 can be used to perform data processing.

[0235] Optionally, the device 1200 further includes a storage unit, which can be used to store instructions and / or data. The processing unit 1220 can read the instructions and / or data in the storage unit so that the device implements the actions of different communication devices in the foregoing method embodiments, for example, the actions of the first communication device or the second communication device.

[0236] The device 1200 can be used to perform the actions performed by the first communication device or the second communication device in the foregoing method embodiments. At this time, the device 1200 can be the first communication device or the second communication device, or a component of the first communication device or the second communication device. The transceiver unit 1210 is used to perform the operations related to the transceiver of the first communication device or the second communication device in the foregoing method embodiments, and the processing unit 1220 is used to perform the operations related to the processing of the first communication device or the second communication device in the foregoing method embodiments.

[0237] It should also be understood that the device 1200 herein is embodied in the form of functional units. The term "unit" herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a proprietary processor, or a group of processors, etc.) for executing one or more software or firmware programs, and a memory, a combined logic circuit, and / or other suitable components that support the described functions. In an alternative example, those skilled in the art can understand that the device 1200 may specifically be the first communication device or the second communication device in the above embodiments, and may be used to execute each process and / or step corresponding to the first communication device or the second communication device in the above method embodiments. To avoid repetition, it will not be elaborated here.

[0238] The device 1200 of each of the above solutions has the function of implementing the corresponding steps executed by the first communication device or the second communication device in the above method. The function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions; for example, the transceiver unit can be replaced by a transceiver (for example, the sending unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver), and other units, such as the processing unit, etc., can be replaced by a processor, respectively performing the transceiver operations and related processing operations in each method embodiment.

[0239] In addition, the above transceiver unit 1210 may also be a transceiver circuit (for example, it may include a receiving circuit and a sending circuit), and the processing unit may be a processing circuit.

[0240] It should be noted that Figure 12 the device in may be the communication device in the foregoing embodiments, or may be a chip or a chip system, for example: a system on chip (SoC). Among them, the transceiver unit may be an input / output circuit, a communication interface; the processing unit is a processor, a microprocessor, or an integrated circuit integrated on the chip. It is not limited here.

[0241] As Figure 13 shown, the embodiment of the present application provides another communication device 1300. The device 1300 includes a processor 1310, and the processor 1310 is coupled to a memory 1320. The memory 1320 is used to store computer programs or instructions and / or data. The processor 1310 is used to execute the computer programs or instructions stored in the memory 1320, or read the data stored in the memory 1320 to execute the methods in the above method embodiments.

[0242] Optionally, the processor 1310 is one or more.

[0243] Optionally, there is one or more memories 1320.

[0244] Optionally, the memory 1320 is integrated with the processor 1310 or is separately provided.

[0245] Optionally, as Figure 13 shown, the apparatus 1300 further includes a transceiver 1330, and the transceiver 1330 is configured to receive and / or transmit signals. For example, the processor 1310 is configured to control the transceiver 1330 to receive and / or transmit signals.

[0246] As a solution, the apparatus 1300 is configured to implement the operations performed by the first communication device or the second communication device in the foregoing method embodiments.

[0247] For example, the processor 1310 is configured to execute the computer programs or instructions stored in the memory 1320 to implement the related operations of the communication device in the foregoing method embodiments. For example, Figures 3 to 11 the first communication device or the second communication device in any one of the embodiments shown in Figures 3 to 11 or the method of the first communication device or the second communication device in any one of the embodiments shown in.

[0248] It should be understood that the processor mentioned in the embodiments of the present application may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0249] It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory and / or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM). For example, the RAM can be used as an external cache. By way of example and not limitation, the RAM includes the following various forms: static random access memory (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0250] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA, or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, the memory (storage module) can be integrated in the processor.

[0251] It should also be noted that the memory described herein is intended to include, but not be limited to, these and any other suitable types of memory.

[0252] As Figure 14 , the embodiments of the present application provide a chip system 1400. The chip system 1400 (or can also be referred to as a processing system) includes a logic circuit 1410 and an input / output interface 1420.

[0253] Among them, the logic circuit 1410 can be the processing circuit in the chip system 1400. The logic circuit 1410 can be coupled to a storage unit and call instructions in the storage unit, enabling the chip system 1400 to implement the methods and functions of the embodiments of the present application. The input / output interface 1420 can be the input / output circuit in the chip system 1400, outputting the information processed by the chip system 1400 or inputting the data or signaling information to be processed into the chip system 1400 for processing.

[0254] As a solution, the chip system 1400 is used to implement the operations performed by the first communication device or the second communication device in the above method embodiments.

[0255] For example, the logic circuit 1410 is used to implement the operations related to the processing of the first communication device or the second communication device in the above method embodiments, such as Figures 3 to 11 the operations related to the processing of the first communication device or the second communication device in any of the embodiments shown in Figures 3 to 11 ; the input / output interface 1420 is used to implement the operations related to the sending and / or receiving of the first communication device or the second communication device in the above method embodiments, such as

[0256] the operations related to the sending and / or receiving performed by the first communication device or the second communication device in any of the embodiments shown in

[0257] For example, when the computer program is executed by a computer, the computer can implement the methods performed by the first communication device or the second communication device in the above method embodiments.

[0258] The embodiments of the present application also provide a computer-readable storage medium, on which computer instructions for implementing the methods performed by the first communication device or the second communication device in the above method embodiments are stored.

[0259] The explanations and beneficial effects of the relevant content in any of the above provided devices can refer to the corresponding method embodiments provided above, and will not be elaborated here.

[0260] In several embodiments provided by this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect coupling or communication connection of the devices or units can be in electrical, mechanical or other forms.

[0261] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of this application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. For example, the computer can be a personal computer, a server, or a network device, etc. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that the computer can access or a data storage device such as a server or data center that includes one or more integrated 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 DVD), or a semiconductor medium (such as a solid state disk (SSD), etc.). For example, the foregoing available media include, but are not limited to: USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs and other media that can store program codes.

[0262] As described above, the above are only the specific implementation manners of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed by this application can easily think of changes or substitutions, which should all be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. A communication method, characterized in that including: determine a first time-frequency resource for carrying a first reference signal and first data, the first reference signal being used to determine channel state information CSI; receive the first reference signal on the first time-frequency resource to determine the CSI, and receive the first data.

2. The method according to claim 1, characterized in that, The first time-frequency resource is included in one transmission time interval TTI, or included in one time slot, or included in one symbol.

3. The method according to claim 1 or 2, characterized in that, The time domain position of the first reference signal on the first time-frequency resource is before the time domain position of the first data on the first time-frequency resource.

4. The method according to any one of claims 1 to 3, characterized in that, The determining the first time-frequency resource includes: receive first indication information for indicating the time domain position and / or frequency domain position of receiving the first data and the time domain position and / or frequency domain position of receiving the first reference signal within the first time-frequency resource; determine the first time-frequency resource according to the first indication information.

5. The method according to claim 4, characterized in that, The first indication information is included in downlink control information DCI or radio resource control RRC signaling.

6. The method according to any one of claims 1 to 5, characterized in that, The first time-frequency resource is further used to carry first information including the CSI and the decoding result of the first data.

7. The method according to any one of claims 1 to 5, characterized in that The method further includes: determine a second time-frequency resource for carrying first information including the CSI and the decoding result of the first data.

8. The method according to claim 7, characterized in that, The determining the second time-frequency resource includes: receive second indication information for indicating the time domain position and / or frequency domain position of transmitting the first information within the second time-frequency resource; determine the second time-frequency resource according to the second indication information.

9. The method according to claim 8, wherein The second indication information is included in DCI, or the second indication information includes identification information of hybrid automatic repeat request acknowledgement HARQ-ACK.

10. The method according to any one of claims 1 to 9, characterized in that, The first time-frequency resource is further used to carry a second reference signal for demodulating the channel for receiving the first data.

11. The method according to claim 10, wherein The time domain position of the second reference signal on the first time-frequency resource is different from the time domain position of the first reference signal on the first time-frequency resource; or, the time domain position of the second reference signal on the first time-frequency resource is the same as the time domain position of the first reference signal on the first time-frequency resource, and the frequency domain position of the first reference signal on the first time-frequency resource and the frequency domain position of the second reference signal on the first time-frequency resource have a frequency division multiplexing FDM form or a code division multiplexing CDM form.

12. The method according to claim 10 or 11, characterized in that The method further includes: obtain a first correspondence between a plurality of first ports and a plurality of second ports, the first ports being used to determine the CSI, the second ports being used to demodulate the channel for receiving the first data, and the frequency domain positions of each first port and the corresponding second port being the same while the time domain positions being different; determine the measurement results of (K1 + K2) first ports according to K1 first ports among the plurality of first ports, K2 second ports among the plurality of second ports, and the first correspondence, the K2 second ports corresponding to the K2 first ports, where K1 and K2 are integers.

13. The method according to any one of claims 10 to 12, characterized in that, The method further includes: Determining a power deviation between a first port and a second port according to a frequency-domain density of the first reference signal and a frequency-domain density of the second reference signal, where the first port is used to determine the CSI, and the second port is used to demodulate a channel for receiving the first data.

14. The method according to any one of claims 1 to 13, characterized in that, The method further includes: Adjusting a number of first ports according to a decoding result of the first data, where the first ports are used to determine the CSI.

15. The method according to any one of claims 1 to 14, characterized in that, Before determining the first time-frequency resource, the method further includes: Receiving a first wake-up signal, where the first wake-up signal is used to activate a terminal device or a network device.

16. A communication method, characterized in that, Including: Determining a first time-frequency resource, where the first time-frequency resource is used to carry a first reference signal and first data, and the first reference signal is used to determine a channel state information (CSI); On the first time-frequency resource, sending the first reference signal and sending the first data.

17. The method according to claim 16, wherein The first time-frequency resource is included in a transmission time interval (TTI), or included in a time slot, or included in a symbol.

18. The method according to claim 16 or 17, characterized in that, A time-domain position of the first reference signal on the first time-frequency resource is before a time-domain position of the first data on the first time-frequency resource.

19. The method according to any one of claims 16 to 18, characterized in that, The method further includes: Sending first indication information, where the first indication information is used to indicate a time-domain position and / or a frequency-domain position of sending the first data in the first time-frequency resource and a time-domain position and / or a frequency-domain position of sending the first reference signal.

20. The method according to claim 19, wherein The first indication information is included in a downlink control information (DCI) or a radio resource control (RRC) signaling.

21. The method according to any one of claims 16 to 20, characterized in that, The first time-frequency resource is further used to carry first information, where the first information includes the CSI and a decoding result of the first data.

22. The method according to any one of claims 16 to 21, characterized in that, The method further includes: Sending second indication information, where the second indication information is used to indicate a time-domain position and / or a frequency-domain position of receiving the first information in a second time-frequency resource, and the first information includes the CSI and a decoding result of the first data.

23. The method according to any one of claims 16 to 22, characterized in that, The first time-frequency resource is further used to carry a second reference signal, where the second reference signal is used to demodulate a channel for sending the first data.

24. The method according to claim 23, wherein A time-domain position of the second reference signal on the first time-frequency resource is different from a time-domain position of the first reference signal on the first time-frequency resource; or, a time-domain position of the second reference signal on the first time-frequency resource is the same as a time-domain position of the first reference signal on the first time-frequency resource, and a frequency-domain position of the first reference signal on the first time-frequency resource and a frequency-domain position of the second reference signal on the first time-frequency resource have a form of frequency-division multiplexing (FDM) or a form of code-division multiplexing (CDM).

25. The method according to any one of claims 16 to 24, characterized in that Before determining the first time-frequency resource, the method further includes: Sending a first wake-up signal, where the first wake-up signal is used to activate a network device or a terminal device.

26. A communication device, characterized in that, Including: A processor, where the processor is configured to execute a program or an instruction, so that the device executes the method according to any one of claims 1 to 15.

27. A communication device, characterized in that, Including: A processor, where the processor is configured to execute a program or an instruction, so that the device executes the method according to any one of claims 16 to 25.

28. A communication system, characterized in that, Comprising the communication device as described in claim 26 and claim 27.

29. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, and when the computer program runs on a computer, it causes the computer to execute the method as described in any one of claims 1 to 15, or the method as described in any one of claims 16 to 25.

30. A computer program product, characterized in that, Comprising computer program code, which when run, implements the method as described in any one of claims 1 to 15, or the method as described in any one of claims 16 to 25.

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