Communication method and communication apparatus

Abstract

The present application provides a communication method and a communication apparatus. The communication method comprises: determining a first time-frequency resource, wherein the first time-frequency resource is used for carrying a first reference signal and first data, and the first reference signal is used for determining channel state information (CSI); and receiving the first reference signal on the first time-frequency resource to determine the CSI, and receiving the first data. The method provided in the embodiments of the present application shortens the time delay of a communication device in measuring a CSI and receiving data, thereby shortening the time delay of the communication device in operating in an active state.

Description

Communication method and communication device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on January 9, 2024, with application number 202410034830.X, and priority to the Chinese patent application entitled “A Communication Method and Communication Device”, all contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communications, and more particularly, to a communication method and a communication device. Background Art

[0003] In release 18 of the 5th generation (5G) mobile communication system, research on low power wake up signals (LP WUS) has been carried out to evaluate the potential for reducing power consumption of communication devices such as terminal devices or network devices equipped with low power wake up radios (LP WUR). Generally speaking, communication devices consume tens of milliwatts of power even if they do not send or receive any data. This idle power consumption is due to the fact that the communication device must periodically 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.

[0004] However, when a connected communication device wakes up from a dormant state and returns to an active state, the movement of users of the communication device, such as a terminal device, may cause misalignment of the uplink and downlink beams. Alternatively, the communication device may need to remeasure the channel information due to outdated channel information, or resend the synchronization signal block (PBCH block, SSB) for time-frequency domain synchronization due to synchronization timeout. At this point, the communication device needs to perform steps such as resynchronization, channel measurement, and measurement feedback. This process is time-consuming and has a high latency in measurement feedback, ultimately resulting in the inability to provide timely feedback on channel changes.

[0005] Summary of the Invention

[0006] The present application provides a communication method and a communication device, which reduce the delay of a communication device in measuring CSI and receiving data by carrying a reference signal and data in the same time-frequency resource, thereby reducing the delay of the communication device in operating in an activated state.

[0007] In a first aspect, a communication method is provided, which can be applied to a network device or a terminal device, or a component of a network device or a terminal. For simplicity, the method is described here using a network device or a terminal device as an example.

[0008] 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 networking scenario (SA) or a communication system in a dual connectivity (DC) scenario.

[0009] For example, in a communication system in an SA scenario, a 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 standard. For example, the core network is a 5G core network, and the network device corresponds to a 5G base station, which is directly connected to the 5G core network; or the core network is a 6G core network, and the network device corresponds to a 6G base station, which is directly connected to the 6G core network.

[0010] For example, in a DC scenario, a terminal device is simultaneously connected to network devices of different or same standards, which is applicable to connected UEs. For example, when the core network is a 5G core network, the terminal device can be connected to a 5G base station and a 6G base station at the same time, with the 5G base station serving as the primary station and the 6G base station serving as 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, with the 6G base station serving as the primary station and the 5G base station serving as the secondary station. For another example, when the core network is a 6G core network, the terminal device can be simultaneously connected to two 6G base stations, i.e., both the primary station and the secondary station are 6G base stations.

[0011] It is worth noting that the communication system applicable to the embodiment of the present application is not limited thereto, and any communication that can realize the functions of the above-mentioned network elements is applicable to the embodiment of the present application. The communication system of the embodiment of the present application may also be a non-terrestrial network (NTN) communication system, such as a satellite communication network, a high altitude platform system (HAPS) and an air-to-ground network. For example, a satellite communication system may include a satellite, and there is a terminal device on the satellite to communicate with a ground base station. Among them, the satellite may refer to a non-ground base station or non-ground equipment such as a drone, a hot air balloon, a low-orbit satellite, a medium-orbit satellite, and a high-orbit satellite. The NTN communication system can be deployed alone or as a supplement to the ground network. It should also be understood that the above naming is only defined to facilitate the distinction between different functions and should not constitute any limitation to this application. This application does not exclude the possibility of adopting other naming in 6G networks and other future networks.

[0012] The method includes: determining a first time-frequency resource, the first time-frequency resource is used to carry a first reference signal and first data, 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.

[0013] Optionally, in an embodiment 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).

[0014] Optionally, CSI may include a CSI resource index (index), a rank indicator (RI), a channel quality indicator (CQI), etc. To reduce the number of feedback bits, the network device may select one or more optimal CQIs from the sub-band CQI to report. Optionally, CSI may also include a precoding matrix indicator (PMI), which can be used to feedback the precoding matrix when the pilot signal power difference is 0, thereby reducing the feedback bit overhead.

[0015] It should be understood that when a communication device is in an activated state and working, the communication device needs to send one or more SSBs for time-frequency domain synchronization. Then the communication device (such as a terminal device) receives downlink control information (DCI) from another communication device (such as a network device). Finally, the communication device receives a first reference signal for determining channel state information (CSI) and data in the channel, and feeds back the channel state information CSI and data decoding results.

[0016] However, when a connected communication device wakes up from a dormant state and returns to an active state, the communication device needs to remeasure the channel information due to outdated channel information. Alternatively, the user of a communication device, such as a terminal, may move, which may cause uplink and downlink beam misalignment. Alternatively, due to synchronization timeout, the communication device needs to resend the synchronization signal block (PBCH block, SSB) for time and frequency domain synchronization. At this point, the communication device needs to perform steps such as resynchronization, channel measurement, and measurement feedback. These steps have a long delay, resulting in the communication device being unable to provide timely feedback on channel changes.

[0017] Therefore, compared with carrying the first reference signal and the first data separately through multiple different time domain resources with time intervals, in the technical solution of the present application, by carrying the first reference signal and the first data in the same time-frequency resource, the delay of the communication device in measuring CSI and receiving data is reduced, thereby reducing the total delay of the communication device in performing steps such as resynchronization, channel measurement, and measurement feedback.

[0018] Optionally, the communication method shown in the first aspect can be used only after being triggered and activated by the communication device, or it may not require triggering. For example, when the DCI that the communication device needs to send is configured with the time domain position and / or frequency domain position of the first reference signal and the first data, the communication device may use the communication method shown in the first aspect by default. For another example, the communication device may be instructed by the DCI to operate in an activated state using the communication method shown in the first aspect. For another example, the communication device may be reporting through its own events, for example, the conditions for reporting events may be based on the increase and decrease in the measured signal path loss, changes in the results of the mobility measurement of the terminal device user, etc., or the channel information being outdated or the synchronization timeout mentioned above.

[0019] In combination with the first aspect, in certain implementations of the first aspect, the first time-frequency resource is included in a transmission time interval (TTI), or in a time slot, or in a symbol.

[0020] It should be understood that in a wireless communication system, data or information can be carried by time-frequency resources, wherein the time-frequency resources may include resources in the time domain and resources in the frequency domain. The resources in the time domain may include one or more time domain units. A time domain unit may be a symbol, or a mini-slot, or a slot, or a transmission time interval (TTI), or a subframe, wherein the duration of a subframe in the time domain may be 1 millisecond (ms), a slot consists of 14 symbols, and a mini-slot may 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).

[0021] In an embodiment of the present application, the time domain positions at which 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 time slot or the same symbol. And preferably, there is no time interval or delay between the time domain positions at which the first reference signal and the first data are received. For example, taking the same time slot as an example. A time slot may include 14 symbols, wherein the communication device may receive the first reference signal in the first k symbols and may 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 an embodiment of the present application, the value of j may be k+1, so that the communication device does not have a time interval or delay between receiving the first reference signal and receiving the first data, or receives the first data immediately after receiving the first reference signal.

[0022] The above method reduces the time delay for the communication device to measure CSI and receive data, thereby reducing the total time delay for the communication device to perform steps such as resynchronization, channel measurement, and measurement feedback.

[0023] In combination with the first aspect, in certain implementations of the first aspect, the time domain position of the first reference signal on the first time-frequency resource is located before the time domain position of the first data on the first time-frequency resource.

[0024] By using the above method, the time domain position of the first reference signal is placed at a front time domain position in the first time-frequency resource, so that the communication device can quickly obtain CSI before feedback.

[0025] In combination with the first aspect, in certain implementations of the first aspect, determining the first time-frequency resource includes: receiving first indication information, the first indication information being used to indicate 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 determining the first time-frequency resource based on the first indication information.

[0026] In combination with the first aspect, in certain implementations of the first aspect, the first indication information is included in downlink control information DCI or radio resource control RRC signaling.

[0027] 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 scheduling the transmission of the first data or receiving 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 offset value is 0, the first reference signal and the first data multiplex the same time domain unit resource and are in different frequency domain resources. When the offset value 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.

[0028] In combination with the first aspect, in some implementations of the first aspect, the first time-frequency resource is also used to carry first information, and the first information includes a decoding result of the CSI and the first data.

[0029] Specifically, the above method is a process in which a communication device feeds back CSI and a decoding result of first data, so that the communication device receiving the first information can adjust the data transmission process in the channel based on the feedback result. 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.

[0030] It should be understood that in the above method, the first reference signal and first data are received via the first time-frequency resource, and the decoding result of the CSI and the first data is fed back. In other words, the communication device measures CSI, receives data, and provides feedback all within the same time-domain resource, thereby reducing the latency of the entire workflow while the communication device is active.

[0031] In combination with the first aspect, in certain implementations of the first aspect, the method further includes: determining a second time-frequency resource, where the second time-frequency resource is used to carry first information, where the first information includes a decoding result of the CSI and the first data.

[0032] Specifically, the above method is a process in which a communication device feeds back CSI and a decoding result of first data, so that the communication device receiving the first information can adjust the data transmission process in the channel based on the feedback result. 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.

[0033] It should be understood that in the above solution, the decoding results of the CSI and the first data are fed back via the second time-frequency resource. The second time-frequency resource may be separated from the first time-frequency resource by one or more time domain units, such as symbols or time slots. In embodiments of the present application, the total latency of the communication device workflow can also be reduced by shortening the time interval between the first time-frequency resource and the second time-frequency resource.

[0034] In combination with the first aspect, in certain implementations of the first aspect, determining the second time-frequency resource includes: receiving second indication information, the second indication information being used to indicate the time domain position and / or frequency domain position of sending the first information within the second time-frequency resource; and determining the second time-frequency resource based on the second indication information.

[0035] In combination with the first aspect, in certain implementations of the first aspect, the second indication information is included in the DCI, or the second indication information includes identification information of a hybrid automatic repeat request acknowledgement HARQ-ACK.

[0036] Exemplarily, the DCI may indicate the time domain position on the first time-frequency resource at which the communication device feeds back the decoding result of the CSI and the first data by using the value of K0+offset+K1, where 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 the channel resource scheduled for data feedback. When the value of offset is 0, the time domain position at which the communication device feeds back the decoding result of the CSI and the first data is the time domain position at which the channel resource was scheduled. When the value of offset is greater than 0, the time domain position at which the decoding result of the CSI and the first data is fed back is after the time domain position at which the channel resource was scheduled.

[0037] In combination with the first aspect, in some implementations 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 a channel for receiving the first data.

[0038] In the embodiment of the present application, the second reference signal may be a demodulation reference signal DMRS, or may be other reference signals that can be used to estimate channel information to demodulate the channel, which is not limited herein.

[0039] In combination with the first aspect, in certain 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 frequency division multiplexing FDM form or a code division multiplexing CDM form.

[0040] It is worth noting that, preferably, the time domain positions of the first reference signal and the second reference signal in the first time-frequency resource may be located before the time domain position of the first data in the first time-frequency resource.

[0041] In combination with the first aspect, in certain implementations of the first aspect, the method further includes: obtaining a first correspondence between multiple first ports and multiple second ports, the first port being used to determine the CSI, the second port being used to demodulate the channel for receiving the first data, each first port having the same frequency domain position as the corresponding second port but a different time domain position; determining measurement results of (K1+K2) first ports based on K1 first ports among the multiple first ports, K2 second ports among the multiple second ports, and the first correspondence, the K2 second ports corresponding to K2 first ports, where K1 and K2 are integers.

[0042] In an embodiment of the present application, the first reference signal may be CSI-RS, the first port may be a port for determining CSI by measuring CSI-RS, the second reference signal may be DMRS, and the second port may be a port for estimating channel information to achieve channel demodulation.

[0043] For example, the first port, port 1000, and the second port, port 3000, are located at the same frequency domain position and are close in time domain position, and the first port, port 1001, and the second port, port 3001, are located at the same frequency domain position and are close in time domain position. Therefore, it can be determined that the channel information measurement results of port 1000 and port 3000 are similar, and the channel information measurement results of port 1001 and port 3001 are similar, and ultimately, it is determined that port 1000 corresponds to port 3000 and port 1001 corresponds to port 3001. When the communication device needs the channel information measurement results of the four second ports, ports 3000 to 3003, the channel information measurement results of the four ports, port 1000, port 1001, port 3002, and port 3003, can be obtained by measuring the four ports, port 1000, port 1001, port 3002, and port 3003.

[0044] In other words, each first port is at the same frequency domain position as the corresponding second port and at a different time domain position, and the time domain positions of the two ports can be very close or there is no time interval. The communication device can determine the measurement results of (K1+K2) first ports based on K1 first ports, K2 second ports and the corresponding relationship, and the K2 second ports correspond to K2 first ports, where K1 and K2 are integers. For example, K1 or K2 can be 0, that is, the embodiment 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, and the channel information measurement results are used to determine CSI, or the embodiment 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, and the channel information measurement results are used to demodulate the channel for transmitting the first data.

[0045] In combination with the first aspect, in certain implementations of the first aspect, the method further includes: determining a power deviation between a first port and a second port based on a frequency domain density of the first reference signal and a frequency domain density of the second reference signal, the first port being used to determine the CSI, and the second port being used to demodulate a channel for receiving the first data.

[0046] In combination with the first aspect, in some implementations of the first aspect, the method further includes: adjusting the number of first ports according to a decoding result of the first data, where the first ports are used to determine the CSI.

[0047] It should be understood that the communication device can obtain channel information by measuring the first reference signal through the first port to determine CSI, and can estimate the channel information through the second port to demodulate the channel used to transmit the first data. The number of the first port and the second port affects the latency of the first communication device in obtaining the channel information.

[0048] In an embodiment of the present application, the communication device may adjust the number of first ports or second ports used for channel measurement based on the decoding result of the obtained first data. The adjusted number of first ports or second ports is used for the next workflow of the communication device, that is, when the communication device re-performs workflows such as resynchronization in the activation state, channel measurement, and measurement feedback, the adjusted number of first ports or second ports is used to measure the channel.

[0049] Exemplarily, ACK=0 means that the decoding result of the first data is correct. At this time, the 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 processing delay and resource configuration overhead, while also reducing feedback overhead. In an 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 the measurement channel will gradually increase. Similarly, ACK=1 means that the decoding result of the first data is incorrect. At this time, the communication device can gradually reduce the number of the first port or the second port, for example, from 2 ports to 1 port.

[0050] In combination with the first aspect, in certain implementations of the first aspect, adjusting the number of first ports includes: obtaining third indication information, the third indication information being used to indicate multiple third time-frequency resources in the first time-frequency resource, and the number of first ports used in the multiple third time-frequency resources is different; adjusting the time-frequency position when receiving the first reference signal from the fourth time-frequency resource to the fifth time-frequency resource, the multiple third time-frequency resources including the fourth time-frequency resource and the fifth time-frequency resource.

[0051] For example, the DCI received by the communication device indicates that in symbol x1, the communication device measures the channel information through one port, in symbol x2, the communication device measures the channel information through two ports, and in symbol x3, the communication device measures the channel information through four ports. Furthermore, when ACK = 0, the communication device can 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, thereby adjusting the number of first ports used in the next operation of the communication device from one port to two ports. Similarly, the communication device adjusts the measurement resources or time-frequency resources of the first reference signal from symbol x3 to symbol x2, thereby adjusting the number of first ports used in the next operation of the communication device from four ports to two ports.

[0052] It is worth noting that the above-mentioned method of indicating multiple measurement resources or multiple time-frequency resources through DCI is only an example. This application does not limit the method of indicating multiple measurement resources or multiple time-frequency resources. For example, multiple measurement resources or multiple time-frequency resources can also be indicated through predefined rules.

[0053] In combination with the first aspect, in certain implementations of the first aspect, the method also includes: performing beam scanning on multiple sixth time-frequency resources to obtain multiple beam scanning feedback results, the multiple sixth time-frequency resources are used to carry multiple first reference signals respectively, and the multiple sixth time-frequency resources have different time domain positions on the first time-frequency resource.

[0054] It should be understood that the embodiments of the present application can use a narrow beam for beam scanning on the measurement resources or time-frequency resources of the first reference signal such as CSI-RS, and can use a wide beam for beam scanning on the time-frequency resources of the first data, thereby ensuring the quality of data transmission.

[0055] Optionally, the multiple sixth time-frequency resources may all be included in one symbol but distributed across multiple different symbols. This ensures that the time domain positions of different time domain resources do not overlap and reduces feedback overhead. For example, the multiple sixth time domain resources may have the same starting time slot, but the DCI received by the communication device may indicate multiple different offset values, thereby ensuring that the time domain positions of the multiple sixth time domain resources do not overlap.

[0056] With reference to the first aspect, in certain implementations of the first aspect, the number of first ports used to measure each first reference signal in the multiple first reference signals is one.

[0057] It should be understood that the reason is that the beam scanning result is not accurate enough, and using too many first ports will waste port resources.

[0058] In combination with the first aspect, in certain implementations of the first aspect, the method further includes: sending at least two first information, each first uplink information in the at least two first information includes at least one of the multiple beam scanning feedback results.

[0059] It should be understood that after obtaining multiple beam scanning results, the communication device needs to report or feedback the beam scanning results through uplink information or downlink information. The process is similar to the process of feeding back the CSI and the decoding result of the first data described above. However, because the communication device also needs to feed back the CSI and the decoding result of the first data simultaneously through one uplink information or one downlink information, channel resources are limited at this time, and it may not be possible to complete the reporting of the beam scanning results in one go. Therefore, one or more additional uplink information or downlink information must be used to feed back the beam scanning results.

[0060] 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.

[0061] In an embodiment of the present application, the first wake-up signal may be an LP WUS signal, and the communication device wakes up from the sleep state to the active state after receiving the first wake-up signal.

[0062] In a second aspect, a communication method is provided, which 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 method is described here using a terminal device or a network device as an example.

[0063] The method includes: determining a first time-frequency resource, the first time-frequency resource is used to carry a first reference signal and first data, the first reference signal is used to determine channel state information CSI; sending the first reference signal and the first data on the first time-frequency resource.

[0064] In combination with the second aspect, in certain implementations of the second aspect, the first time-frequency resource is included in a transmission time interval TTI, or in a time slot, or in a symbol.

[0065] In combination with the second aspect, in certain implementations of the second aspect, the time domain position of the first reference signal on the first time-frequency resource is located before the time domain position of the first data on the first time-frequency resource.

[0066] In combination with the second aspect, in certain implementations of the second aspect, the method also includes: sending first indication information, where the first indication information is used to indicate the time domain position and / or frequency domain position of sending the first data within the first time-frequency resource and the time domain position and / or frequency domain position of sending the first reference signal.

[0067] In combination with the second aspect, in certain implementations of the second aspect, the first indication information is included in downlink control information DCI or radio resource control RRC signaling.

[0068] In combination with the second aspect, in certain implementations of the second aspect, the first time-frequency resource is also used to carry first information, and the first information includes a decoding result of the CSI and the first data.

[0069] In combination with the second aspect, in certain implementations of the second aspect, the method also includes: sending second indication information, wherein the second indication information is used to indicate the time domain position and / or frequency domain position of receiving the first information within the second time-frequency resource, and the first information includes the CSI and the decoding result of the first data.

[0070] In combination with the second aspect, in some implementations of the second aspect, the first time-frequency resource is further used to carry a second reference signal, and the second reference signal is used to demodulate a channel that sends the first data.

[0071] In combination with the second aspect, in certain 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 frequency division multiplexing FDM form or a code division multiplexing CDM form.

[0072] 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, where the first wake-up signal is used to activate the network device or the terminal device.

[0073] The specific scheme description and beneficial effects of the communication method shown in the second aspect can be referred to the first aspect and will not be repeated here.

[0074] In a third aspect, a communication device is provided, which includes: a processing unit, used to: determine 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 channel state information CSI; a transceiver unit, used to: receive the first reference signal on the first time-frequency resource to determine the CSI, and receive the first data.

[0075] In combination with the third aspect, in certain implementations of the third aspect, the first time-frequency resource is included in a transmission time interval TTI, or in a time slot, or in a symbol.

[0076] In combination with the third aspect, in certain implementations of the third aspect, the time domain position of the first reference signal on the first time-frequency resource is located before the time domain position of the first data on the first time-frequency resource.

[0077] In combination with the third aspect, in certain implementations of the third aspect, the transceiver unit is further used to: receive first indication information, where the first indication information is used to indicate 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; the processing unit is specifically used to: determine the first time-frequency resource based on the first indication information.

[0078] In combination with the third aspect, in certain implementations of the third aspect, the first indication information is included in downlink control information DCI or radio resource control RRC signaling.

[0079] In combination with the third aspect, in certain implementations of the third aspect, the first time-frequency resource is also used to carry first information, and the first information includes a decoding result of the CSI and the first data.

[0080] In combination with the third aspect, in certain implementations 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, where the first information includes a decoding result of the CSI and the first data.

[0081] In combination with the third aspect, in certain implementations of the third aspect, the transceiver unit is also used to: receive 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; and the processing unit is specifically used to: determine the second time-frequency resource based on the second indication information.

[0082] In combination with the third aspect, in certain implementations of the third aspect, the second indication information is included in the DCI, or the second indication information includes identification information of a hybrid automatic repeat request acknowledgement HARQ-ACK.

[0083] In combination with the third aspect, in certain implementations of the third aspect, the first time-frequency resource is also used to carry a second reference signal, and the second reference signal is used to demodulate a channel for receiving the first data.

[0084] In combination with the third aspect, in certain implementations 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.

[0085] In combination with the third aspect, in certain implementations of the third aspect, the transceiver unit is further used to: obtain a first correspondence between multiple first ports and multiple second ports, the first port is used to determine the CSI, the second port is used to demodulate the channel for receiving the first data, and each first port has the same frequency domain position as the corresponding second port but a different time domain position; the processing unit is further used to: determine the measurement results of (K1+K2) first ports based on K1 first ports among the multiple first ports, K2 second ports among the multiple second ports, and the first correspondence, the K2 second ports correspond to K2 first ports, where K1 and K2 are integers.

[0086] In combination with the third aspect, in certain implementations of the third aspect, the processing unit is also used to: determine the power deviation between the first port and the second port based on the frequency domain density of the first reference signal and the frequency domain density of the second reference signal, the first port being used to determine the CSI, and the second port being used to demodulate the channel for receiving the first data.

[0087] In combination with the third aspect, in certain implementations of the third aspect, the processing unit is further used to: adjust the number of first ports according to a decoding result of the first data, where the first ports are used to determine the CSI.

[0088] In combination with the third aspect, in certain implementations of the third aspect, the transceiver unit is further used 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 in the multiple third time-frequency resources is different; the processing unit is specifically used to: adjust the time-frequency position when receiving the first reference signal from the fourth time-frequency resource to the fifth time-frequency resource, and the multiple third time-frequency resources include the fourth time-frequency resource and the fifth time-frequency resource.

[0089] In combination with the third aspect, in certain implementations of the third aspect, the processing unit is also used to: perform beam scanning on multiple sixth time-frequency resources to obtain multiple beam scanning feedback results, the multiple sixth time-frequency resources are used to carry multiple first reference signals respectively, and the multiple sixth time-frequency resources have different time domain positions on the first time-frequency resource.

[0090] In combination with the third aspect, in some implementations of the third aspect, the number of first ports used to measure each first reference signal in the multiple first reference signals is 1.

[0091] In combination with the third aspect, in certain implementations of the third aspect, the transceiver unit is further used to: send at least two first information, each first uplink information in the at least two first information includes at least one of the multiple beam scanning feedback results.

[0092] In combination with the third aspect, in certain implementations of the third aspect, before determining the first time-frequency resource, the transceiver unit is further used to: receive a first wake-up signal, where the first wake-up signal is used to activate the terminal device or the network device.

[0093] The explanation and beneficial effects of the communication device provided in the third aspect can refer to the communication method shown in the first aspect and will not be repeated here.

[0094] In a fourth aspect, a communication device is provided, which includes: a processing unit, used to: determine a first time-frequency resource, the first time-frequency resource is used to carry a first reference signal and first data, the first reference signal is used to determine channel state information CSI; a transceiver unit, used to: send the first reference signal and the first data on the first time-frequency resource.

[0095] In combination with the fourth aspect, in certain implementations of the fourth aspect, the first time-frequency resource is included in a transmission time interval TTI, or in a time slot, or in a symbol.

[0096] In combination with the fourth aspect, in certain implementations of the fourth aspect, the time domain position of the first reference signal on the first time-frequency resource is located before the time domain position of the first data on the first time-frequency resource.

[0097] In combination with the fourth aspect, in certain implementations of the fourth aspect, the transceiver unit is also used to: send first indication information, where the first indication information is used to indicate the time domain position and / or frequency domain position of sending the first data within the first time-frequency resource and the time domain position and / or frequency domain position of sending the first reference signal.

[0098] In combination with the fourth aspect, in certain implementations of the fourth aspect, the first indication information is included in downlink control information DCI or radio resource control RRC signaling.

[0099] In combination with the fourth aspect, in certain implementations of the fourth aspect, the first time-frequency resource is also used to carry first information, and the first information includes a decoding result of the CSI and the first data.

[0100] In combination with the fourth aspect, in certain implementations of the fourth aspect, the transceiver unit is further used to: send 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, and the first information includes the CSI and the decoding result of the first data.

[0101] In combination with the fourth aspect, in certain implementations of the fourth aspect, the first time-frequency resource is also used to carry a second reference signal, and the second reference signal is used to demodulate a channel that sends the first data.

[0102] In combination with the fourth aspect, in certain 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 frequency division multiplexing FDM form or a code division multiplexing CDM form.

[0103] In combination with the fourth aspect, in certain implementations of the fourth aspect, before determining the first time-frequency resource, the transceiver unit is further used to: send a first wake-up signal, where the first wake-up signal is used to activate the network device or the terminal device.

[0104] The explanation and beneficial effects of the communication device provided in the fourth aspect can refer to the communication method shown in the second aspect and will not be repeated here.

[0105] In a fifth aspect, a communication device is provided, comprising a processor, wherein the processor is configured to enable the communication device to execute the method of the first aspect and any possible method of the first aspect by executing a computer program or instruction or through a logic circuit.

[0106] In a possible implementation, the communication device further includes a memory for storing the computer program or instruction.

[0107] In a possible implementation, the communication device further includes a communication interface, which is used to input and / or output signals.

[0108] In a sixth aspect, a communication device is provided, comprising a processor, wherein the processor is configured to enable the communication device to execute the method of the second aspect and any possible method of the second aspect by executing a computer program or instruction or through a logic circuit.

[0109] In a possible implementation, the communication device further includes a memory for storing the computer program or instruction.

[0110] In a possible implementation, the communication device further includes a communication interface, which is used to input and / or output signals.

[0111] In the seventh aspect, a communication device is provided, comprising a logic circuit and an input / output interface, the input / output interface being used to input and / or output signals, the logic circuit being used to execute the first aspect and any possible method of the first aspect; or, the logic circuit being used to execute the second aspect and any possible method of the second aspect.

[0112] In an eighth aspect, a computer-readable storage medium is provided, on which a computer program or instruction is stored. When the computer program or the instruction is run on a computer, the method according to the first aspect and any possible embodiment of the first aspect is executed; or, the method according to the second aspect and any possible embodiment of the second aspect is executed.

[0113] In the ninth aspect, a computer program product is provided, comprising instructions, which, when executed on a computer, cause the method according to the first aspect and any possible embodiment of the first aspect to be executed; or cause the method according to the second aspect and any possible embodiment of the second aspect to be executed.

[0114] In a tenth aspect, a communication system is provided, which includes the communication device according to the third and fourth aspects, or the communication device according to the fifth and sixth aspects.

[0115] For the description of the beneficial effects of the third to tenth aspects, reference can be made to the description of the first to second aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0116] FIG1 is a schematic architecture diagram of a communication system provided in an embodiment of the present application.

[0117] FIG2 is a schematic architecture diagram of another communication system provided in an embodiment of the present application.

[0118] FIG3 is a schematic diagram of the workflow of the communication device activation state provided in an embodiment of the present application.

[0119] FIG4 is a schematic diagram of time domain resources for a communication device to feed back CSI and decoding results according to an embodiment of the present application.

[0120] FIG5 is a schematic diagram of a first time-frequency resource provided in an embodiment of the present application.

[0121] FIG6 is a schematic diagram of an interaction flow of a communication method provided in an embodiment of the present application.

[0122] FIG7 is a schematic diagram of an interaction flow of another communication method provided in an embodiment of the present application.

[0123] FIG8 is a schematic diagram of another first time-frequency resource provided in an embodiment of the present application.

[0124] FIG9 is a schematic diagram of a correspondence between a first port and a second port provided in an embodiment of the present application.

[0125] FIG10 is a schematic diagram of adjusting the number of ports provided in an embodiment of the present application.

[0126] FIG11 is a schematic diagram of a beam scanning provided in an embodiment of the present application.

[0127] FIG12 is a schematic block diagram of a communication device according to an embodiment of the present application.

[0128] FIG13 is a schematic block diagram of another communication device provided in an embodiment of the present application.

[0129] FIG14 is a schematic block diagram of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0130] The technical solution in this application will be described below with reference to the accompanying drawings.

[0131] First, with reference to FIG1 and FIG2 , the communication system and network architecture applicable to the embodiments of the present application are introduced.

[0132] The technical solutions provided in this application can be applied to various communication systems, such as: fifth generation (5G) or new radio (NR) systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, universal mobile telecommunication systems (UMTS), etc. The technical solutions provided in this application can also be applied to future communication systems, such as sixth generation (6G) mobile communication systems. The technical solutions provided in this 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 systems, non-terrestrial network (NTN) communication systems or other communication systems.

[0133] This application can also be applied to other communication systems. As long as there is an entity in the communication system that needs to send downlink data and pilot information, and another entity needs to receive the indication information and be able to feedback information and transmit data. In other words, the communication system has downlink and uplink communication links.

[0134] It should be understood that the embodiments of the present application do not specifically limit the specific structure of the execution subject of the provided method. As long as it is possible to 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 the network device that can call and execute the program.

[0135] As an example, Figures 1 and 2 show schematic diagrams of a network architecture provided by an embodiment of the present application. Exemplarily, the architecture may include terminal devices, network devices, and a core network.

[0136] The terminal device involved in the embodiments of the present application may also be referred to as a terminal, which may be a device with wireless transceiver functions, which may be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; it may also be deployed on the water (such as ships, etc.); it may also be deployed in the air (such as airplanes, balloons, and satellites, etc.). The terminal device may 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 may be a mobile phone, a tablet computer, or a computer with wireless transceiver functions, etc. In addition, the terminal device may also be a device that can support the terminal to implement the function, such as a chip or a chip system, which may be installed in the terminal. In the technical solution provided in the embodiments of the present application, the technical solution provided in the embodiments of the present application is described by taking the terminal as an example in which the device for implementing the function of the terminal is a terminal. It should be understood that terminal is a general term, including the most common mobile phones, CPE, and integrated access backhaul (IAB) terminals. Terminal devices can also be virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, wireless terminals in industrial control, wireless terminals in unmanned driving, wireless terminals in telemedicine, wireless terminals in smart grids, wireless terminals in smart cities, wireless terminals in smart homes, and so on.

[0137] In the embodiments of the present application, the device for implementing the function of the terminal device can be the terminal device, or it can be a device that can support the terminal device to implement the function, such as a chip system or chip, which can be installed in the terminal device. In the embodiments of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0138] The network devices involved in the embodiments of the present application include base stations (BS), which can be devices deployed in a wireless access network that can communicate wirelessly with a terminal. Among them, the base station may have various forms, for example, a macro base station, a micro base station, a relay station and an access point, a backhaul station, etc. Exemplarily, the base station involved in the embodiments of the present application may be a base station in 5G or a base station in LTE. Among them, the base station in 5G can also be called a transmission reception point (TRP) or a next generation base station (next generation nodded, gNB). In the embodiments of the present application, the device for realizing the function of the network device can be a network device; it can also be a device that can support the network device to realize the function, such as a chip or a chip system, which can be installed in the network device. In the embodiments of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices. In the technical solution provided in the embodiments of the present application, the device for realizing the function of the network device is a network device, and the network device is a base station as an example to describe the technical solution provided in the embodiments of the present application.

[0139] Figure 1 is an exemplary architecture diagram of a communication system 100 according to an embodiment of the present application. The method according to the embodiment of the present application can be applied to the communication system 100 shown in Figure 1. It should be understood that the communication system 100 to which the method according to the embodiment of the present application can be applied may include more or fewer network devices, terminal devices, or core network devices. The network devices, terminal devices, or core network in Figure 1 may be hardware, functionally divided software, or a combination of the two. The network devices and terminal devices in Figure 1, as well as the network devices and the core network, may communicate through other devices or network elements.

[0140] In the communication system 100 shown in Figure 1, the core network 120, network device 110, and terminal devices 101 to 106 form a communication system 100 in a standalone (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 via a transmission network.

[0141] In the SA scenario, the terminal device in the communication system 100 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 standard. For example, the core network is a 5G core network, and the network device corresponds to a 5G base station, which is directly connected to the 5G core network; or the core network is a 6G core network, and the network device corresponds to a 6G base station, which is directly connected to the 6G core network.

[0142] It should be understood that terminal devices 101-106 can be, for example, cellular phones, smartphones, laptops, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, drone terminals, and / or any other suitable devices for communicating on wireless communication system 100. Furthermore, terminal devices 104-106 can also form a communication system. In this communication system, terminal device 105 can send downlink data to terminal device 104 or terminal device 106.

[0143] Figure 2 is an exemplary architecture diagram of a communication system 200 according to another embodiment of the present application. The method according to the embodiment of the present application can be applied to the communication system 200 shown in Figure 2. It should be understood that the communication system 200 to which the method according to the embodiment of the present application can be applied may include more or fewer network devices, terminal devices, or core network devices. The network devices, terminal devices, or core network in Figure 2 may be hardware, functionally divided software, or a combination of the two. The network devices and terminal devices in Figure 2, as well as the network devices and the core network, may communicate through other devices or network elements.

[0144] In the communication system 200 shown in Figure 2, core network 220, network device 210, and terminal devices 204 to 106 form a communication system 200 in a dual connectivity (DC) scenario. In this communication system 200, network device 210 can send downlink data to terminal devices 204 to 206. Of course, terminal devices 204 to 206 can also send uplink data to network device 210. Network device 210 and core network 220 can achieve connection and data transmission through a transmission network.

[0145] In the DC scenario, the terminal device is connected to network devices of different or same standards at the same time, which is applicable to connected UE. For example, when the core network is a 5G core network, the terminal device can be connected to network device 211 (such as a 5G base station) and network device 216 (such as a 6G base station) at the same time, where the 5G base station serves as the main station and the 6G base station serves as the auxiliary station; for another example, when the core network is a 6G core network, the terminal device can be connected to network device 211 (such as a 5G base station) and network device 216 (such as a 6G base station) at the same time, where the 6G base station serves as the main station and the 5G base station serves as the auxiliary station; for another example, when the core network is a 6G core network, the terminal device can be connected to two 6G base stations at the same time, that is, both the main station and the auxiliary station are 6G base stations.

[0146] It should be understood that terminal devices 204-206 can be, for example, cellular phones, smartphones, laptops, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, drone terminals, and / or any other suitable devices for communicating on wireless communication system 100. Furthermore, terminal devices 204-206 can also form a communication system. In this communication system, terminal device 205 can send downlink data to terminal device 204 or terminal device 206.

[0147] 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, and any communication that can realize the functions of the above-mentioned network elements is applicable to the embodiments of the present application. For example, the network architecture shown in Figures 1 and 2 may include a larger number and more types of terminal devices and network devices. As another example, the communication system of the embodiment of the present application may also be a non-terrestrial network (NTN) communication system, such as a satellite communication network, a high altitude platform system (HAPS) and an air-to-ground network. For example, a satellite communication system may include a satellite, and there are terminal devices on the satellite to communicate with a ground base station. Among them, the satellite may refer to a non-ground base station or non-ground equipment such as a drone, a hot air balloon, a low-orbit satellite, a medium-orbit satellite, and a high-orbit satellite. The NTN communication system can be deployed alone or as a supplement to the ground network.

[0148] It should also be understood that the above naming is only defined to facilitate the distinction between different functions and should not constitute any limitation to this application. This application does not exclude the possibility of adopting other naming in 6G networks and other future networks.

[0149] The following describes the working process of the existing communication device after waking up and the existing technical problems.

[0150] With the advancement of communication technology, communication networks are placing increasingly higher demands on the capabilities of communication devices, such as terminal devices or network equipment. For example, increased network capabilities require higher speeds for communication devices; diverse applications require diverse forms of communication devices, such as those involved in smartphones, VR / AR, drones, autonomous driving, and wearable devices; and communication devices need to support more frequency bands and wider bandwidths. As the requirements for communication device capabilities increase, the hardware required will also increase, and power consumption will inevitably increase. For example, under typical services (such as comprehensive web browsing, instant messaging, gaming, and video streaming), the average increase in power consumption for terminal devices exceeds 200%. The long-term battery life of terminals is a crucial aspect of user experience and impacts the use of terminal services. Therefore, the long-term battery life of communication devices faces significant challenges, and the key to solving this problem is to find ways to reduce power consumption.

[0151] In Release 18 of the fifth generation (5G) mobile communication system, research on a low-power wake-up signal (LP WUS) has been conducted to evaluate the potential for reducing power consumption in communication devices equipped with a low-power wake-up radio (LP WUR). Typically, a communication device consumes tens of milliwatts of power even when not sending or receiving any data. This idle power consumption is due to the fact that the communication device must periodically measure and detect potential paging messages. If the communication device detects an LP WUS signal, it will proceed to decode the paging message and wake up from sleep mode to active mode. Otherwise, it will return to sleep mode and wait for the next LP WUS signal. The LP-WUS signal is very similar to the wake-up signal (WUS). The WUS is transmitted based on the traditional Zadoff-Chu sequence and downlink control information (DCI) in Format 2-6 on the physical data control channel (PDCCH).

[0152] Figure 3 shows a schematic diagram of the process of a communication device waking up from a dormant state to an active state on a time-frequency resource. (a) in Figure 3 shows the process of a communication device waking up from a dormant state to an active state at this stage.

[0153] First, the communication device receives a WUS signal and then wakes up from the sleep state to the active state. The 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 a channel state information reference signal (CSI-RS) and the data in the channel, and feeds back channel state information (CSI) and data decoding results.

[0154] It should be understood that CSI may include a CSI resource index (index), a rank indicator (RI), a channel quality indicator (CQI), etc. To reduce the number of feedback bits, the network device may select one or more optimal CQIs from the sub-band CQI to report. Optionally, the CSI may also include a precoding matrix indicator (PMI), which can be used to feedback the precoding matrix when the pilot signal power difference is 0, thereby reducing the feedback bit overhead.

[0155] It is worth noting that the workflow shown in Figure 3 is only an example. The wake-up signal received in the communication device workflow may also be other types of wake-up signals, and the reference signal used to determine the channel state information may also be other reference signals such as a demodulation reference signal (DMRS). This application does not exclude the possibility of using other types of signals in 6G networks and other future networks. For the convenience of describing the solution, this application takes the 5G network shown in Figure 3 as an example to introduce the embodiment.

[0156] It should be understood that in a wireless communication system, data or information can be carried by time-frequency resources, wherein the time-frequency resources may include resources in the time domain and resources in the frequency domain. Among them, the resources in the time domain may include one or more time domain units. A time domain unit may be a symbol, or a mini-slot, or a slot, or a transmission time interval (TTI), or a subframe, wherein the duration of a subframe in the time domain may be 1 millisecond (ms), a slot consists of 14 symbols, and a mini-slot may 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 an embodiment of the present application, "data" or "information" may be understood as bits generated after encoding of an information block, or "data" or "information" may also be understood as modulation symbols generated after encoding and modulation of an information block.

[0157] For example, the workflow shown in FIG3 (a) and the communication device as a terminal device are used as an example to describe the operation process of the terminal device in the activation state. As shown in FIG3 (a), the terminal device can perform the above workflow in different time-frequency resources, such as transmission time intervals (TTIs), time slots, and symbols.

[0158] For example, the terminal device can receive the DCI sent by the network device in time slot 1, and the DCI may include indication information for indicating the time domain position of the terminal device receiving the CSI-RS and downlink data from the network device, and may include indication information for indicating the time domain position when the terminal device feeds back the CSI and data decoding results to the network device through uplink information.

[0159] For another example, the terminal device can receive at least one CSI-RS in time slot 2, time slot 3, and possibly multiple time slots, and then the terminal device can obtain the channel state information of the downlink channel between the network device and the terminal device, such as the precoding matrix, channel quality information, etc., by measuring the CSI-RS. The channel state information can be used for scheduling and link adaptation of the network device. In addition, the terminal device can feedback the measured channel state information of the downlink channel to the network device through the physical uplink control channel (PUCCH) in at least one time slot such as time slot n2. The time domain position of the terminal device receiving the CSI-RS and feeding back the CSI can be indicated by the above-mentioned DCI.

[0160] For another example, the terminal device may receive downlink data from the network device via the physical downlink shared channel (PDSCH) in time slot n1, and may feed back the decoding result of the downlink data to the network device via the PUCCH in at least one other time slot. The time domain location at which the terminal device receives the downlink data and feeds back the decoding result may be indicated by the above-mentioned DCI.

[0161] The workflow shown in (a) in Figure 3 can also be applied to network devices, for example, a terminal device sends a WUS signal to a network device to wake up the network device from a sleep state to an active state. At this time, the PDSCH shown in (a) in Figure 3 will be replaced by a physical uplink shared channel (PUSCH), and the PUCCH will be replaced by a 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 rest of the workflow can be found in the above description and will not be repeated here.

[0162] However, when a connected communication device wakes up from a dormant state and returns to an active state, the communication device needs to remeasure the channel information due to outdated channel information. Alternatively, user movement of a communication device, such as a terminal, may cause misalignment of uplink and downlink beams. Alternatively, due to synchronization timeout, the communication device needs to resend the synchronization signal block (PBCH block, SSB) for time-frequency domain synchronization. At this point, the communication device needs to perform steps such as resynchronization, channel measurement, and measurement feedback, i.e., the entire workflow of the active state shown in Figure 3 (a).

[0163] As shown in (a) of Figure 3, there is a time interval or delay between the terminal device receiving CSI-RS and receiving downlink data. Similarly, there is a time interval or delay between receiving downlink data and feeding back CSI and decoding results. Or it is possible that there is a time interval or delay between the terminal device receiving one CSI-RS and receiving another CSI-RS. Therefore, these delays will cause the communication device to take a long time to re-activate all work processes, and the delay in measuring CSI-RS, receiving data, and feeding back CSI and decoding results is high, which ultimately leads to the communication device being unable to timely feedback channel changes in the above scenario.

[0164] To solve the above technical problems, the present application provides a communication method that can shorten the time delay for communication devices to obtain channel information and use it for data transmission in a timely manner. An embodiment of the communication method will be described below with reference to Figures 3 to 11.

[0165] Example 1:

[0166] Taking the communication device as a terminal device as an example, Figure 3(b) shows a schematic diagram of the communication method provided by this application. As shown in Figure 3(b), after receiving the WUS signal, the terminal device enters the activated state and operates. After receiving the DCI from the network device in time slot 1, the terminal device receives the CSI-RS and downlink data in time slot 2, and sends the CSI and downlink data decoding results to the network device through the same uplink information.

[0167] In other words, in the communication method provided in the present application, the time domain positions of the CSI-RS and downlink data received by the terminal device are in the same time domain unit, such as the same TTI or the same time slot or the same symbol shown in (b) of Figure 3. And preferably, there is no time interval or delay between the time domain positions of the received CSI-RS and the downlink data. In addition, the terminal device feeds back the decoding results of the CSI and downlink data to the network device through an uplink message. In this way, the delay of the entire workflow of the communication device obtaining the CSI and downlink data and feeding back the decoding results of the CSI and downlink data can be shortened, thereby quickly feeding back channel changes.

[0168] Optionally, in order to further shorten the delay of the above-mentioned workflow, an embodiment of the present application can also be a numerology configuration with a larger frequency domain subcarrier spacing, for example, the frequency domain subcarrier spacing SCS of CSI-RS = 120KHz, at which time the length of each time slot is 0.125ms, thereby further shortening the delay of the terminal device in performing the above-mentioned workflow.

[0169] For example, taking the same time slot as shown in (b) of FIG3 as an example, time slot 2 may include 14 symbols, wherein the communication device may receive CSI-RS in the first k symbols and may begin receiving 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 an embodiment of the present application, the value of j may be k+1, so that there is no time interval or delay between the reception of CSI-RS and the reception of data by the communication device, or the downlink data is received immediately after the CSI-RS is received.

[0170] Exemplarily, FIG4 shows a schematic diagram of a time-frequency resource of the communication method of the present application, wherein FIG4 takes the communication device as a terminal device as an example to introduce the determination of the time-frequency resource. As shown in (a) in FIG4 , the terminal device can receive CSI-RS and receive downlink data in time slot 1, and feedback the CSI and downlink data decoding results through PUCCH in the subsequent time slot m1, that is, the terminal device reception and feedback processes are in different time domain units. As shown in (b) in FIG4 , the terminal device can receive CSI-RS and receive downlink data in time slot m2, and feedback the CSI and downlink data decoding results through PUCCH in time slot m2, that is, the terminal device reception and feedback processes are in the same time domain unit such as the time slot in FIG4 or the TTI or symbol mentioned above, and preferably, the reception and feedback processes do not include a time interval or delay.

[0171] For example, FIG5 shows a schematic diagram of another time-frequency resource of the communication method of the present application, wherein FIG5 takes the communication device as a terminal device as an example to introduce the determination of time-frequency resources. As shown in (a) of FIG5, the terminal device can receive a CSI-RS and receive downlink data once in time slot m2, wherein the time domain position of receiving a CSI-RS and receiving downlink data once can be located in one or more symbols in time slot m2. As shown in (b) of FIG5, the terminal device can continuously receive CSI-RS and receive downlink data twice or more times in time slot m2. In this way, when the terminal device cannot obtain CSI by measuring a CSI-RS once, it can obtain complete CSI by receiving and measuring CSI-RS multiple times. As shown in (c) of FIG5, the terminal device can receive CSI-RS twice or more times and receive downlink data twice or more in time slot m2. For example, the terminal device can first receive and measure a CSI-RS, then receive some less important downlink data from the network device, and then receive and measure a CSI-RS again to obtain complete CSI, and finally receive the remaining downlink data from the network device. Preferably, in an embodiment of the present application, the terminal device receives 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.

[0172] In other words, the time domain positions at which the terminal device receives the CSI-RS and downlink data may be at different positions in the same time domain unit, such as different symbols in the same time slot, and the number of times the CSI-RS and downlink data are received may be one or more times. As shown in (d) in FIG5 , the time domain positions at which the terminal device receives the CSI-RS and downlink data may also be at the same position in the same time domain unit. In this case, the frequency domain positions at which the terminal device receives the CSI-RS and downlink data are different, and the distribution of the frequency domain positions may be in the form of frequency-division multiplexing (FDM) or code division multiplexing (CDM).

[0173] Specifically, the frequency domain position distribution shown in (d) in Figure 5 is in FDM form, that is, the carrier bandwidth is divided into two sub-channels of different frequency bands, which are used to receive CSI-RS and downlink data respectively. Optionally, in another embodiment of the present application, the CDM form can be that multiple sub-channels for receiving CSI-RS and multiple sub-channels for receiving downlink data are staggered on the frequency band. For example, the carrier bandwidth can be divided into 8 sub-channels of different frequency bands, which are arranged in the order of frequency division as sub-channel #1 to sub-channel #8, among which sub-channel #1, sub-channel #3, sub-channel #5 and sub-channel #7 can be used to receive CSI-RS, and sub-channel #2, sub-channel #4, sub-channel #6 and sub-channel #8 can be used to receive downlink data.

[0174] Figure 6 shows a schematic diagram of the interaction flow of a communication method 600 provided in an embodiment of the present application, and Figure 7 shows a schematic diagram of the interaction flow of a communication method 700 provided in an embodiment of the present application. Communication method 600 includes steps S610 to S650, which are used to enable a communication device to determine the decoding results of CSI and data. In communication methods 600 and 700, information is exchanged between a first communication device and a second communication device. The first communication device can be a terminal device, and the second communication device can be a network device. Alternatively, the first communication device can be a network device, and the second communication device can be a terminal device.

[0175] S610: The second communication device determines a first time-frequency resource.

[0176] It should be understood that the second communication device determines the time domain location and / or frequency domain location when sending the first reference signal and the 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.

[0177] 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 may be included in a TTI, a time slot, or a symbol.

[0178] S620: The second communication device sends first indication information to the first communication device.

[0179] 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 when sending the first reference signal on the first time-frequency resource and the time domain position and / or frequency domain position when sending the first data. In other words, the first indication information is used to indicate the time domain position and / or frequency domain position of the first reference signal received by the first communication device on the first time-frequency resource and the time domain position and / or frequency domain position when receiving the first data.

[0180] Optionally, the first indication information may be included in the DCI shown in Figure 3. Furthermore, step S620 may be that the second communication device sends a DCI to the first communication device, where the DCI includes the first indication information. In other embodiments of the present application, the first indication information may also be included in radio resource control (RRC) signaling.

[0181] For example, DCI can use the K0 value to indicate the time domain position of the downlink data on the first time-frequency resource, where K0 is the time slot offset between the first communication device receiving DCI and scheduling PDSCH or receiving the first data; DCI can use the K0+offset value to indicate the time domain position of the first reference signal such as CSI-RS on the first time domain resource. When the offset value is 0, CSI-RS and PDSCH multiplex the same time domain unit resource example and are in different frequency domain resources. When the offset value 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.

[0182] S630: The first communication device determines a first time-frequency resource.

[0183] Specifically, the first communications device determines the first time-frequency resource based on the first indication information in step S620. In other words, the first communications device determines the time domain position and / or frequency domain position for receiving the first reference signal and the time domain position and / or frequency domain position for receiving the first data on the first time-frequency resource.

[0184] S640: The second communication device sends a first reference signal and first data on a first time-frequency resource.

[0185] Correspondingly, the first communication device receives the first reference signal and the first data on the first time-frequency resource.

[0186] Among them, the first reference signal is used to determine the channel state information CSI. The first reference signal can be the CSI-RS mentioned above, or it can be other reference signals used to determine channel information such as DMRS. This application does not limit the type of the first reference signal.

[0187] 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.

[0188] S650: The first communication device determines a decoding result of the CSI and the first data.

[0189] The first communications device determines the CSI based on the first reference signal, for example, by measuring the CSI-RS to obtain the CSI of the uplink channel or the downlink channel. The decoding result of the first data may be an ACK, and the ACK value may be used to indicate whether the decoding result is correct. For example, when ACK=0, it indicates that the decoding result of the first data is correct, and when ACK=1, it indicates that the decoding result of the first data is incorrect.

[0190] The communication method 700 includes steps S710 to S740, which are used to enable the communication device to feed back the decoding results of CSI and data.

[0191] S710. The second communication device determines a second time-frequency resource.

[0192] The second time-frequency resource is used to carry first information, where the first information includes CSI and a 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.

[0193] Optionally, as shown in (a) in 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 discontinuous in time domain position; as shown in (b) in 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.

[0194] S720: The second communication device sends second indication information to the first communication device.

[0195] Correspondingly, the first communication device receives second indication information from the second communication device.

[0196] The second indication information is used to indicate the time domain position and / or frequency domain position of the decoding result of the CSI and the first data received by the second communication device on the second time-frequency resource, or in other words, the second indication information is used to indicate the time domain position and / or frequency domain position of the decoding result of the CSI and the first data sent by the first communication device on the second time-frequency resource.

[0197] Optionally, the second indication information may be included in the DCI shown in Figure 3. Furthermore, step S720 may be that the second communication device sends a DCI to the first communication device, where the DCI includes the second indication information. In other embodiments of the present application, the second indication information may also be included in radio resource control (RRC) signaling.

[0198] For example, the second indication information may include identification information of a hybrid automatic repeat request acknowledgement HARQ-ACK, and the ID of the HARQ-ACK may be used to indicate the time domain position of the CSI fed back by the first communication device.

[0199] For another example, the DCI may indicate the time domain position on the first time-frequency resource at which the communication device feeds back the decoding result of the CSI and the first data by using the value of K0+offset+K1, where 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 the channel resource scheduled for data feedback. When the value of offset is 0, the time domain position at which the communication device feeds back the decoding result of the CSI and the first data is the time domain position at which the channel resource was scheduled. When the value of offset is greater than 0, the time domain position at which the decoding result of the CSI and the first data is fed back is after the time domain position at which the channel resource was scheduled.

[0200] S730: The first communication device determines a second time-frequency resource.

[0201] Specifically, the first communication device determines the second frequency domain resource based on the second indication information, or determines the time domain position and / or frequency domain position of sending the first information including the CSI and the decoding result of the first data on the second frequency domain resource.

[0202] S740: The first communication device sends the decoding result of the CSI and the first data on the second time-frequency resource.

[0203] Specifically, the second communication device receives the decoding result of the 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 can adaptively optimize the scheduling process based on the received channel quality information during the downlink scheduling process. The decoding result of the CSI and the first data can be carried in the first information. When the first communication device is a terminal device, the first information can be uplink information; when the first communication device is a network device, the first information can be downlink information.

[0204] In the technical solution shown in Example 1, the second communication device transmits the first reference signal and the first data to the first communication device over a first time-frequency resource, such as a TTI, a time slot, or a symbol, thereby significantly reducing the total latency for acquiring CSI and data in the workflow shown in FIG3 . Furthermore, the second communication device simultaneously receives the CSI and the decoding result of the first data fed back by the first communication device over a second time-frequency resource, thereby significantly reducing the feedback latency in the workflow shown in FIG3 .

[0205] Optionally, the workflow shown in (b) in Figure 3 can be activated by a communication device, or it can be used without triggering. For example, when the DCI that the second communication device needs to send is configured with the time domain position and / or frequency domain position of the first reference signal and the first data, the first communication device and the second communication device can use the workflow shown in (b) in Figure 3 by default. For another example, the second communication device can be activated by the workflow shown in (b) in Figure 3 through a DCI instruction. For another example, the second communication device or the first communication device can report through its own events. For example, the conditions for reporting events can be based on the increase and decrease in the measured signal path loss, changes in the results of the mobility measurement of the terminal device user, or the channel information outdated or synchronization timeout mentioned above.

[0206] Optionally, in other embodiments of the present application, the working mode shown in (a) in Figure 3 and the working mode shown in (b) in Figure 3 can be switched to each other. For example, after the second communication device receives feedback and confirms the channel change through the working mode shown in (b) in Figure 3, the first communication device and the second communication device can switch to the working mode shown in (a) in Figure 3, thereby improving the robustness of information interaction between the communication devices.

[0207] Example 2:

[0208] Different from embodiment 1, in embodiment 2, the first time-frequency resource is also used to carry a second reference signal, which is used to demodulate the channel for sending or receiving the first data. In the embodiment of the present application, the second reference signal can be a demodulation reference signal DMRS.

[0209] FIG8 illustrates the relationship between the time domain positions of the first reference signal, the second reference signal, and the first data in the first time-frequency resource, provided in an embodiment of the present application. For ease of description, an example is taken where the first reference signal is a CSI-RS, the second reference signal is a DMRS, and the first data is downlink data transmitted on a PDSCH.

[0210] As shown in (a) of Figure 8 , the time domain position of the CSI-RS can be located before the time domain position of the DMRS. For example, both the DMRS and the CSI-RS can be configured at the first few symbol positions 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 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 located before the time domain position of the first data in the first time-frequency resource.

[0211] As shown in (b) of Figure 8, the time domain position of CSI-RS can be located before the time domain position of DMRS and before the time domain position of downlink data. For example, both DMRS and CSI-RS can be configured at the first few symbol positions in time slot i2.

[0212] In an embodiment of the present application, the time domain position of the CSI-RS can be the same as the time domain position of the DMRS, in which case the frequency domain positions of the CSI-RS and the DMRS are different. As shown in (c) of Figure 8 , the frequency domain position of the CSI-RS and the frequency domain position of the DMRS have a frequency division multiplexing FDM form, that is, the carrier bandwidth is divided into two sub-channels of different frequency bands, which are used to receive the CSI-RS and the DMRS respectively. As shown in (d) of Figure 8 , the frequency domain position of the CSI-RS and the frequency domain position of the DMRS have a code division multiplexing CDM form, that is, the carrier bandwidth is divided into four sub-channels of different frequency bands, and the sub-channels for receiving the CSI-RS and the sub-channels for receiving the DMRS are staggered on the frequency band. It is worth noting that (c) and (d) in Figure 8 are only examples, and the carrier frequency band can also be divided into more sub-channels.

[0213] In embodiment 1, the communications device may determine CSI using a first port for measuring a first reference signal. In this case, the CSI feedback process also reports the measurement result of the first port. In embodiment 2, the measurement result may be reported based on an association between the first port and a second port, where the second port may be a port for estimating channel information based on the second reference signal for channel demodulation.

[0214] FIG9 is a schematic diagram illustrating a correspondence between a first port and a second port. As shown in FIG9 , first port port 1000 and second port port 3000 are located at the same frequency domain position and are close in time domain position. First port port 1001 and second port port 3001 are located at the same frequency domain position and are close in time domain position. Therefore, it can be determined that the channel information measurement results for port 1000 and port 3000 are similar, and the channel information measurement results for port 1001 and port 3001 are similar. Ultimately, it is determined that port 1000 corresponds to port 3000, and port 1001 corresponds to port 3001. When a communication device requires channel information measurement results for four second ports, ports 3000 to 3003, the channel information measurement results for ports 3000 to 3003 can be obtained by measuring port 1000, port 1001, port 3002, and port 3003.

[0215] In other words, each first port is at the same frequency domain position as the corresponding second port and at a different time domain position. In embodiment 2, the communication device can determine the measurement results of (K1+K2) first ports based on K1 first ports, K2 second ports and the corresponding relationship, and the K2 second ports correspond to K2 first ports, wherein K1 and K2 are integers. For example, K1 or K2 can be 0, that is, the embodiment 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, and the channel information measurement results are used to determine CSI, or the embodiment 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, and the channel information measurement results are used to demodulate the channel for transmitting the first data.

[0216] Optionally, the power deviation of 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, an embodiment of the present application provides 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 type 1 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 type 2 type in the table, and the actual power difference between the two reference signals is 3dB.

[0217] Table 1

[0218] It is worth noting that Table 1 can also include more types. For example, the frequency domain densities of the two reference signals can differ by a larger multiple, corresponding to more types and, in turn, higher actual power differences. This comparison is not limited to this.

[0219] Example 3:

[0220] As can be seen from Example 2, in the interaction processes shown in Figures 6 and 7, the first communications device can measure the first reference signal via the first port to obtain channel information to determine CSI, and can estimate the channel information via the second port to demodulate the channel used to transmit the first data. The number of first ports and second ports affects the latency of the first communications device in obtaining the channel information.

[0221] Figure 10 is a schematic diagram showing a change in the number of ports of a communication device. Figure 10(a) shows the current port configuration of a communication device, i.e., the communication device always uses the same number of ports to measure a channel. An embodiment of the present application shows a method for adjusting the number of measurement ports of a communication device, i.e., a first communication device can adjust the number of first ports or second ports used to measure a channel based on the decoding result of the first data obtained in step S650.

[0222] It should be understood that the adjusted number of first ports or second ports is used for the next workflow of the communication device, that is, when the communication device performs the workflow shown in FIG3 again, the adjusted number of first ports or second ports is used to measure the channel.

[0223] As shown in (b) of Figure 10, 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 processing delay and resource configuration overhead, and the feedback overhead is also small. In an 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 the measurement channel will gradually increase. Similarly, as shown in (c) of Figure 10, 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 the number of the first port or the second port unchanged, for example, from 2 ports to 1 port, or maintain it at 2 ports.

[0224] Optionally, an embodiment of the present application can configure multiple measurement resources or multiple time-frequency resources of a reference signal, and the multiple measurement resources correspond to different numbers of ports respectively, so that the first communication device can adjust the number of the first port or the second port by adjusting the measurement resources of the first reference signal or the second reference signal. For example, the DCI received by the first communication device indicates that in symbol x1, the first communication device measures the channel information through 1 port, in symbol x2, the first communication device measures the channel information through 2 ports, and in symbol x3, the first communication device measures the channel information through 4 ports. Furthermore, as shown in (b) of Figure 10, when ACK=0, the first communication device can adjust the measurement resource or time-frequency resource of the first reference signal from symbol x1 to symbol x2, or switch from symbol x1 to symbol x2, thereby adjusting the number of first ports used in the next workflow of the first communication device from 1 port to 2 ports. Similarly, the first communication device adjusts the measurement resource or time-frequency resource of the first reference signal from symbol x3 to symbol x2, so that the number of first ports used in the next work flow of the first communication device is adjusted from 4 ports to 2 ports.

[0225] It is worth noting that the above-mentioned method of indicating multiple measurement resources or multiple time-frequency resources through DCI is only an example. This application does not limit the method of indicating multiple measurement resources or multiple time-frequency resources. For example, multiple measurement resources or multiple time-frequency resources can also be indicated through predefined rules.

[0226] Example 4:

[0227] Figure 11 shows a schematic diagram of a beam scanning provided by an embodiment of the present application, wherein Figure 11 takes the communication device as a terminal device as an example. In the workflow of the embodiment of the present application shown in (b) of Figure 3, a narrow beam can be used to perform beam scanning on the measurement resources or time-frequency resources of the first reference signal such as CSI-RS, and a wide beam can be used to perform beam scanning on the time-frequency resources of the first data, thereby ensuring the quality of data transmission. 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 can perform beam scanning on the four time domain resources respectively through a narrow beam, and perform beam scanning on the time domain resources for scheduling PDSCH through a wide beam, thereby obtaining multiple beam scanning results.

[0228] Optionally, during the beam scanning process, the number of first ports used by the communication device on the above four time domain resources CSI-RS#1 to CSI-RS#4 is fixed to 1. This is because the result of the beam scanning is not accurate enough at this time, and using too many first ports will waste port resources.

[0229] Optionally, the four time-domain resources CSI-RS #1 to CSI-RS #4 may all be included in one symbol, but distributed across four different symbols. This ensures that the time-domain positions of the different time-domain resources do not overlap, and reduces feedback overhead. For example, the four time-domain resources may have the same starting time slot, but the DCI received by the communication device may indicate four different offset values, thereby ensuring that the time-domain positions of the four time-domain resources do not overlap.

[0230] After obtaining multiple beam scanning results, the communication device needs to report or feedback the beam scanning results through uplink information or downlink information. The process is similar to the process of feeding back the CSI and the decoding result of the first data described above. However, because the communication device also needs to feed back the CSI and the decoding result of the first data simultaneously through one uplink information or one downlink information, channel resources are limited at this time, and it may not be possible to complete the reporting of the beam scanning results in one go. Therefore, one or more additional uplink information or downlink information must be used to feed back the beam scanning results.

[0231] Therefore, as shown in Figure 11, taking the communication device as a terminal device as an example, the beam scanning result can be fed back by configuring at least two uplink information or at least two PUCCHs. For example, for the above-mentioned 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 in the above-mentioned 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-mentioned 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. As shown in Figure 11, two different K1 values ​​can be configured. The time domain resources CSI-RS#1 and CSI-RS#2 correspond to one K1, and the results obtained by beam scanning the time domain resources CSI-RS#1 and CSI-RS#2 are reported or fed back through PUCCH#1; the time domain resources CSI-RS#3 and CSI-RS#4 correspond to another K1, and the results obtained by beam scanning the time domain resources CSI-RS#3 and CSI-RS#4 are reported or fed back through PUCCH#2.

[0232] It is worth noting that Figure 11 is only an example. The first reference signal in Figure 11, such as CSI-RS, can also be replaced by a second reference signal, such as DMRS. The embodiments of the present application may include a larger number of time domain resources for measuring the first reference signal or the second reference signal and a larger number of uplink information or downlink information for reporting and feedback.

[0233] The communication method provided in the embodiment of the present application is described in detail above in conjunction with Figures 3 to 11. The communication device provided in the embodiment of the present application is described in detail below in conjunction with Figures 12 to 14, which is used to implement the communication method shown in Figures 3 to 11. It should be understood that the description of the device embodiment corresponds to the description of the method embodiment. Therefore, for matters not described in detail, please refer to the method embodiment above. For the sake of brevity, some contents will not be repeated.

[0234] Figure 12 is a schematic block diagram of a communication device provided in an embodiment of the present application. The device 1200 includes a transceiver unit 1210, which can be used to implement corresponding communication functions. The transceiver unit 1210 can also be called a communication interface or a communication unit.

[0235] Optionally, the device 1200 may further include a processing unit 1220 , which may be configured to perform data processing.

[0236] Optionally, the device 1200 also includes a storage unit, which can be used to store instructions and / or data, and 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 aforementioned method embodiments, for example, the actions of the first communication device or the second communication device.

[0237] The device 1200 can be used to execute the actions performed by the first communication device or the second communication device in the above method embodiments. In this case, 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 execute the transceiver-related operations of the first communication device or the second communication device in the above method embodiments, and the processing unit 1220 is used to execute the processing-related operations of the first communication device or the second communication device in the above method embodiments.

[0238] It should also be understood that the device 1200 here is embodied in the form of a functional unit. The term "unit" here may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a dedicated processor or a group processor, etc.) and a memory for executing one or more software or firmware programs, a combined logic circuit and / or other suitable components that support the described functions. In an optional example, those skilled in the art will understand that the device 1200 may be specifically the first communication device or the second communication device in the above-mentioned embodiment, and may be used to execute the various processes and / or steps corresponding to the first communication device or the second communication device in the above-mentioned method embodiments. To avoid repetition, they will not be described here.

[0239] The apparatus 1200 of each of the above-mentioned solutions has the function of implementing the corresponding steps performed by the first communication device or the second communication device in the above-mentioned method. The functions can be implemented by hardware, or by hardware executing corresponding software implementations. The hardware or software includes one or more modules corresponding to the above-mentioned functions; for example, the transceiver unit can be replaced by a transceiver (for example, the transmitting 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, can be replaced by a processor to respectively perform the transceiver operations and related processing operations in each method embodiment.

[0240] In addition, the transceiver unit 1210 may also be a transceiver circuit (for example, may include a receiving circuit and a transmitting circuit), and the processing unit may be a processing circuit.

[0241] It should be noted that the apparatus in FIG12 may be the communication device in the aforementioned embodiment, or may be a chip or chip system, such as a system on chip (SoC). The transceiver unit may be an input / output circuit or a communication interface; the processing unit may be a processor, microprocessor, or integrated circuit integrated on the chip. This is not limited here.

[0242] As shown in Figure 13, an embodiment of the present application provides another communication device 1300. The device 1300 includes a processor 1310, which 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 perform the methods in the above method embodiments.

[0243] Optionally, there are one or more processors 1310 .

[0244] Optionally, there are one or more memories 1320 .

[0245] Optionally, the memory 1320 is integrated with the processor 1310 or provided separately.

[0246] Optionally, as shown in Figure 13, the apparatus 1300 further includes a transceiver 1330, which 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.

[0247] As a solution, the apparatus 1300 is used to implement the operations performed by the first communication device or the second communication device in the above method embodiments.

[0248] For example, the processor 1310 is configured to execute a computer program or instruction stored in the memory 1320 to implement the relevant operations of the communication device in each of the above method embodiments. For example, the first communication device or the second communication device in any of the embodiments shown in Figures 3 to 11, or the method of the first communication device or the second communication device in any of the embodiments shown in Figures 3 to 11.

[0249] It should be understood that the processor mentioned in the embodiments of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0250] 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 read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM). For example, RAM can be used as an external cache. By way of example and not limitation, RAM includes the following forms: static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0251] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) can be integrated into the processor.

[0252] It should also be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0253] As shown in FIG14 , an embodiment of the present application provides a chip system 1400 . The chip system 1400 (or also referred to as a processing system) includes a logic circuit 1410 and an input / output interface 1420 .

[0254] Logic circuit 1410 may be a processing circuit within chip system 1400. Logic circuit 1410 may be coupled to a storage unit and invoke instructions within the storage unit, enabling chip system 1400 to implement the methods and functions of various embodiments of the present application. Input / output interface 1420 may be an input / output circuit within chip system 1400, outputting information processed by chip system 1400 or inputting data or signaling information to be processed into chip system 1400 for processing.

[0255] 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 various method embodiments.

[0256] For example, the logic circuit 1410 is used to implement the processing-related operations by the first communication device or the second communication device in the above method embodiments, such as the processing-related operations by the first communication device or the second communication device in the embodiments shown in any one of Figures 3 to 11; the input / output interface 1420 is used to implement the sending and / or receiving-related operations by the first communication device or the second communication device in the above method embodiments, such as the sending and / or receiving-related operations performed by the first communication device or the second communication device in the embodiments shown in any one of Figures 3 to 11.

[0257] An embodiment of the present application further provides a computer-readable storage medium storing computer instructions for implementing the methods executed by the first communication device or the second communication device in the above-mentioned method embodiments.

[0258] For example, when the computer program is executed by a computer, the computer can implement the method performed by the first communication device or the second communication device in each embodiment of the above method.

[0259] An embodiment of the present application further provides a computer program product comprising instructions, which, when executed by a computer, implement the methods performed by the first communication device or the second communication device in the above-mentioned method embodiments.

[0260] The explanation of the relevant contents and beneficial effects of any of the above-mentioned devices can be referred to the corresponding method embodiments provided above, which will not be repeated here.

[0261] In the several embodiments provided in 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 only schematic. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0262] 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 process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. 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 wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD)). For example, the aforementioned available medium includes, but is not limited to, various media that can store program code, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0263] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection 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, where the first reference signal is used to determine channel state information (CSI); On the first time-frequency resource, receive the first reference signal to determine the CSI, and receive the first data.

2. The method according to claim 1, wherein 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, wherein 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, where the first information includes 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, where the first information includes the CSI and the decoding result of the first data.

8. The method according to claim 7, wherein 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 form of frequency-division multiplexing (FDM) or code-division multiplexing (CDM).

12. The method according to claim 10 or 11, characterized in that, The method further includes: 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, 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; 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.

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 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.

14. The method according to any one of claims 1 to 13, characterized in that, The method further includes: Adjusting the number of first ports according to the 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 for activating a terminal device or a network device.

16. A communication method, characterized in that, Including: 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, transmitting the first reference signal and transmitting the first data.

17. The method according to claim 16, 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.

18. The method according to claim 16 or 17, 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.

19. The method according to any one of claims 16 to 18, characterized in that, The method further includes: Transmitting first indication information for indicating the time-domain position and / or frequency-domain position of transmitting the first data in the first time-frequency resource and the time-domain position and / or frequency-domain position of transmitting the first reference signal.

20. The method according to claim 19, wherein The first indication information is included in downlink control information (DCI) or 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 the 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: Transmitting second indication information for indicating the time-domain position and / or frequency-domain position of receiving the first information in a second time-frequency resource, where the first information includes the CSI and the 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 for demodulating the channel for transmitting the first data.

24. The method according to claim 23, 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.

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: Transmitting a first wake-up signal for activating a network device or a terminal device.

26. A communication device, characterized in that, Including: A processor for executing a program or an instruction to cause the device to execute the method according to any one of claims 1 to 15.

27. A communication device, characterized in that, Including: A processor for executing a program or an instruction to cause the device to execute 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, the computer is caused 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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