Channel information acquisition method, device and system, chip module and storage medium

Abstract

The invention discloses a channel information acquisition method, device and system, a chip module and a storage medium. When energy differences exist between ports of the communication device, channel information associated with one port group is obtained based on the second reference signal, the communication device sends the first reference signal on the two port groups again, channel information and channel combination information associated with the other port group are obtained based on the first reference signal, and the channel combination information is sent to the other port group. And combining the channel information which is obtained based on the second reference signal and is associated with one port group and the channel information which is obtained based on the first reference signal and is associated with the other port group based on the channel combination information, so that full-channel information with relatively high precision can be obtained, and the precision of the obtained channel information is improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a method, device, system, chip module and storage medium for acquiring channel information. Background Art

[0002] In a time division duplex (TDD) communication system, downlink channel information can be obtained through an uplink channel sounding reference signal (SRS), or it can be determined based on a precoding matrix indicator (PMI) fed back by a terminal device (obtained by the terminal device by measuring a downlink reference signal sent by a network device).

[0003] However, for antenna arrays that contain multiple antenna element patterns with large differences in pattern, or distributed antenna arrays, if downlink channel information is obtained through SRS, the signal energy received by different antenna ports of the antenna array of the network device will be different. For terminal devices with low signal to interference plus noise ratio (SINR), there is a situation where the downlink channel information of some antenna ports (ports with weaker signal energy) obtained by the network device is not accurate enough.

[0004] If the downlink channel information corresponding to all antenna ports of the network device is determined based on the PMI fed back by the terminal device, the PMI feedback overhead is large for the array with a large number of antenna ports. In addition, the antenna port that receives relatively strong signal energy in the antenna array of the network device can obtain more accurate channel information through SRS measurement without PMI feedback, which is a waste of overhead.

[0005] In view of this, when there is a difference in energy between antenna ports of a terminal device or a network device, how to improve the accuracy of the acquired channel information is an issue that needs to be solved urgently. Summary of the invention

[0006] The present application provides a channel information acquisition method, device, system, chip module and storage medium, so as to improve the accuracy of the acquired channel information when there is a difference in energy between ports of a terminal device or a network device.

[0007] In a first aspect, a channel information acquisition method is provided, which can be implemented by a terminal device, or a chip or circuit used for the terminal device.

[0008] The method includes: receiving first reference signals from a first port group and a second port group of a network device respectively; and sending indication information to the network device, wherein the indication information is used to indicate first channel information and channel merging information obtained based on the first reference signal, the first channel information is associated with the first port group, the channel merging information is associated with the first port group and the second port group, the channel merging information is used to merge the second channel information and the first channel information, the second channel information is associated with a third port group, the second channel information is obtained based on a second reference signal, and the second port group belongs to the third port group.

[0009] Alternatively, the method includes: sending a second reference signal to a network device; receiving first reference signals from a first port group and a second port group of the network device respectively, the second port group belongs to a third port group, and the first port group and the third port group are obtained based on the second reference signal; and sending indication information to the network device, the indication information is used to indicate first channel information and channel merging information obtained based on the first reference signal, the first channel information is associated with the first port group, the channel merging information is associated with the first port group and the second port group, the channel merging information is used to merge the second channel information and the first channel information, the second channel information is associated with the third port group, and the second channel information is obtained based on the second reference signal.

[0010] By adopting this method, when there is a difference in signal energy between ports of a network device, the terminal device sends a second reference signal to the network device through all antenna ports of its antenna array, the network device obtains channel information associated with one port group based on the second reference signal, and then sends the first reference signal on two port groups, the terminal device obtains channel information and channel merging information associated with another port group based on the first reference signal and reports them to the network device, and the network device merges the channel information associated with one port group obtained based on the second reference signal and the channel information associated with another port group obtained based on the first reference signal based on the channel merging information, thereby obtaining complete channel information with higher accuracy, thereby improving the accuracy of the acquired channel information.

[0011] In a possible implementation, the first channel information is obtained by normalizing and quantizing third channel information based on reference channel information, the third channel information is obtained based on the first reference signal, and the third channel information is associated with the first port group.

[0012] In this manner, by normalizing and quantizing the third channel information, the terminal device can reduce signaling overhead when subsequently sending the first channel information to the network device.

[0013] In another possible implementation, the channel combination information is obtained based on fourth channel information and the reference channel information, where the fourth channel information is obtained by measuring the first reference signal on a first port in the second port group.

[0014] In this manner, based on the channel merging information, the channel information associated with the first port group and the third port group can be normalized and quantized using the same normalization reference and then merged, thereby improving the accuracy of the channel merging.

[0015] In another possible implementation, the first port is a port with the strongest signal strength in the second port group, or a port predefined by a protocol, or a port configured by a network device, or a port indicated by a terminal device.

[0016] In yet another possible implementation, the channel combination information includes amplitude information and phase information, and the amplitude information and the phase information are obtained based on the fourth channel information and the reference channel information.

[0017] In yet another possible implementation, energy intensity of the first reference signal on the first port group is lower than energy intensity of the first reference signal on the second port group.

[0018] In yet another possible implementation, the first reference signal is a channel state information-reference signal, and the second reference signal is a sounding reference signal.

[0019] In a second aspect, a channel information acquisition method is provided, which can be implemented by a network device, or a chip or circuit used for a network device.

[0020] The method includes: sending a first reference signal on a first port group and a second port group respectively; receiving indication information, the indication information being used to indicate first channel information and channel merging information obtained based on the first reference signal, the first channel information being associated with the first port group, the channel merging information being associated with the first port group and the second port group, the channel merging information being used to merge second channel information and the first channel information, the second channel information being associated with a third port group, the second channel information being obtained based on a second reference signal, and the second port group belonging to the third port group; and merging the first channel information and the second channel information based on the channel merging information to obtain downlink channel information.

[0021] Alternatively, the method includes: receiving a second reference signal, and obtaining second channel information based on the second reference signal, the second channel information being associated with a third port group; sending a first reference signal on a first port group and a second port group respectively, the second port group belonging to the third port group, the first port group and the third port group being obtained based on the division of the second reference signal; receiving indication information, the indication information being used to indicate first channel information and channel merging information obtained based on the first reference signal, the first channel information being associated with the first port group, the channel merging information being associated with the first port group and the second port group, the channel merging information being used to merge the second channel information with the first channel information; and merging the first channel information with the second channel information based on the channel merging information to obtain downlink channel information.

[0022] By adopting this method, when there is a difference in energy between ports of a network device, the network device obtains channel information associated with a port group based on a second reference signal, and then sends a first reference signal on two port groups. The terminal device obtains channel information and channel merging information associated with another port group based on the first reference signal and reports the information to the network device. The network device merges the channel information associated with one port group obtained based on the second reference signal and the channel information associated with another port group obtained based on the first reference signal based on the channel merging information, thereby obtaining complete channel information with higher accuracy, thereby improving the accuracy of the obtained channel information.

[0023] In a possible implementation, the first channel information is obtained by normalizing and quantizing third channel information based on reference channel information, the third channel information is obtained based on the first reference signal, and the third channel information is associated with the first port group.

[0024] In this manner, by normalizing and quantizing the third channel information, the terminal device can reduce signaling overhead when subsequently sending the first channel information to the network device.

[0025] In another possible implementation, the channel combination information is obtained based on fourth channel information and the reference channel information, where the fourth channel information is obtained by measuring the first reference signal on a first port in the second port group.

[0026] In this way, the accuracy of channel merging can be improved by using the same normalization reference for normalization quantization.

[0027] In yet another possible implementation, the first port is a port with the strongest signal strength in the second port group, or a port predefined by a protocol, or a configured port.

[0028] In yet another possible implementation, the channel combination information includes amplitude information and phase information, and the amplitude information and the phase information are obtained based on the fourth channel information and the reference channel information.

[0029] In another possible implementation, the merging the first channel information and the second channel information based on the channel merging information to obtain downlink channel information includes: normalizing the second channel information based on the channel information corresponding to the first port in the second port group in the second channel information to obtain sixth channel information; processing the sixth channel information based on the channel merging information to obtain seventh channel information; and merging the first channel information and the seventh channel information to obtain the downlink channel information.

[0030] In yet another possible implementation, energy intensity of the first reference signal on the first port group is lower than energy intensity of the first reference signal on the second port group.

[0031] In yet another possible implementation, the first reference signal is a channel state information-reference signal, and the second reference signal is a sounding reference signal.

[0032] In a third aspect, a channel information acquisition method is provided, which can be implemented by a terminal device, or a chip or circuit used for a terminal device.

[0033] The method includes: receiving a first reference signal from a network device at a first port group and a second port group; and sending indication information to the network device, wherein the indication information is used to indicate first channel information and channel merging information obtained based on the first reference signal, the first channel information is associated with the first port group, the channel merging information is associated with the first port group and the second port group, the channel merging information is used to merge second channel information and the first channel information, the second channel information is associated with the second port group, and the second channel information is obtained based on the second reference signal.

[0034] Alternatively, the method includes: sending a second reference signal to a network device; receiving a first reference signal from the network device at a first port group and a second port group, the first port group and the second port group being obtained based on the second reference signal; and sending indication information to the network device, the indication information being used to indicate first channel information and channel merging information obtained based on the first reference signal, the first channel information being associated with the first port group, the channel merging information being associated with the first port group and the second port group, the channel merging information being used to merge second channel information and the first channel information, the second channel information being associated with the second port group, and the second channel information being obtained based on the second reference signal.

[0035] By adopting this method, when there is a difference in energy between the ports of the terminal device, the network device obtains channel information associated with a port group of the terminal device based on the second reference signal, and then sends the first reference signal to the two port groups of the terminal device. The terminal device obtains channel information and channel merging information associated with another port group based on the first reference signal and reports them to the network device. The network device merges the channel information associated with one port group obtained based on the second reference signal and the channel information associated with another port group obtained based on the first reference signal based on the channel merging information, thereby obtaining complete channel information with higher accuracy, thereby improving the accuracy of the obtained channel information.

[0036] In yet another possible implementation, the first channel information is obtained by normalizing and quantizing third channel information based on reference channel information, the third channel information is obtained based on the first reference signal, and the third channel information is associated with the first port group.

[0037] In this manner, by normalizing and quantizing the third channel information, the terminal device can reduce signaling overhead when subsequently sending the first channel information to the network device.

[0038] In another possible implementation, the channel combination information is obtained based on fourth channel information and the reference channel information, where the fourth channel information is obtained by measuring the first reference signal on a first port in the second port group.

[0039] In this manner, based on the channel merging information, the channel information associated with the first port group and the third port group can be normalized and quantized using the same normalization reference and then merged, thereby improving the accuracy of the channel merging.

[0040] In another possible implementation, the first port is a port with the strongest signal strength in the second port group, or a port predefined by a protocol, or a port configured by a network device, or a port indicated by a terminal device.

[0041] In yet another possible implementation, the channel combination information includes amplitude information and phase information, and the amplitude information and the phase information are obtained based on the fourth channel information and the reference channel information.

[0042] In yet another possible implementation, energy intensity of the first reference signal on the first port group is lower than energy intensity of the first reference signal on the second port group.

[0043] In yet another possible implementation, the first reference signal is a channel state information-reference signal, and the second reference signal is a sounding reference signal.

[0044] In a fourth aspect, a channel information acquisition method is provided, which can be implemented by a network device, or a chip or circuit used for a network device.

[0045] The method includes: sending a first reference signal to a first port group and a second port group of a terminal device; receiving indication information from the terminal device, the indication information is used to indicate first channel information and channel merging information obtained based on the first reference signal, the first channel information is associated with the first port group, the channel merging information is associated with the first port group and the second port group, the channel merging information is used to merge second channel information and the first channel information, the second channel information is associated with the second port group, the second channel information is obtained based on a second reference signal; and merging the second channel information and the first channel information based on the channel merging information to obtain downlink channel information.

[0046] Alternatively, the method includes: receiving a second reference signal from a terminal device, and obtaining second channel information based on the second reference signal; sending a first reference signal to a first port group and a second port group of the terminal device, wherein the first port group and the second port group are obtained based on the division of the second reference signal; receiving indication information from the terminal device, wherein the indication information is used to indicate first channel information and channel merging information obtained based on the first reference signal, wherein the first channel information is associated with the first port group, and the channel merging information is associated with the first port group and the second port group, and the channel merging information is used to merge the second channel information and the first channel information, wherein the second channel information is associated with the second port group; and merging the second channel information and the first channel information based on the channel merging information to obtain downlink channel information.

[0047] By adopting this method, when there is a difference in energy between the ports of the terminal device, the network device obtains channel information associated with a port group of the terminal device based on the second reference signal, and then sends the first reference signal to the two port groups of the terminal device. The terminal device obtains channel information and channel merging information associated with another port group based on the first reference signal and reports them to the network device. The network device merges the channel information associated with one port group obtained based on the second reference signal and the channel information associated with another port group obtained based on the first reference signal based on the channel merging information, thereby obtaining complete channel information with higher accuracy, thereby improving the accuracy of the obtained channel information.

[0048] In a possible implementation, the first channel information is obtained by normalizing and quantizing third channel information based on reference channel information, the third channel information is obtained based on the first reference signal, and the third channel information is associated with the first port group.

[0049] In this manner, by normalizing and quantizing the third channel information, the terminal device can reduce signaling overhead when subsequently sending the first channel information to the network device.

[0050] In another possible implementation, the channel combination information is obtained based on fourth channel information and the reference channel information, where the fourth channel information is obtained by measuring the first reference signal on a first port in the second port group.

[0051] In this way, the channel information associated with the first port group and the second port group can be normalized and quantized using the same normalization reference based on the channel merging information, thereby improving the accuracy of the channel merging.

[0052] In another possible implementation, the first port is a port with the strongest signal strength in the second port group, or a port predefined by a protocol, or a port configured by a network device, or a port indicated by a terminal device.

[0053] In yet another possible implementation, the channel combination information includes amplitude information and phase information, and the amplitude information and the phase information are obtained based on the fourth channel information and the reference channel information.

[0054] In another possible implementation, the merging the second channel information and the first channel information based on the channel merging information to obtain downlink channel information includes: normalizing the second channel information based on the channel information corresponding to the first port in the second port group in the second channel information to obtain sixth channel information; processing the sixth channel information based on the channel merging information to obtain seventh channel information; and merging the first channel information and the seventh channel information to obtain the downlink channel information.

[0055] In yet another possible implementation, energy intensity of the first reference signal on the first port group is lower than energy intensity of the first reference signal on the second port group.

[0056] In yet another possible implementation, the first reference signal is a channel state information-reference signal, and the second reference signal is a sounding reference signal.

[0057] In a fifth aspect, a channel information acquisition device is provided. The channel information acquisition device can implement the method in the first aspect or any one of the implementations of the first aspect. For example, the channel information acquisition device can be a chip or a terminal device. The above method can be implemented by software, hardware, or by hardware executing corresponding software.

[0058] In one possible implementation, the device includes: a transceiver unit and a processing unit; wherein: the transceiver unit is used to receive first reference signals from a first port group and a second port group of a network device, respectively; the processing unit is used to generate indication information, the indication information is used to indicate first channel information and channel merging information obtained based on the first reference signal, the first channel information is associated with the first port group, the channel merging information is associated with the first port group and the second port group, the channel merging information is used to merge the second channel information and the first channel information, the second channel information is associated with a third port group, the second channel information is obtained based on the second reference signal, and the second port group belongs to the third port group; and the transceiver unit is used to send the indication information to the network device.

[0059] Alternatively, the transceiver unit is used to send a second reference signal to the network device; the transceiver unit is also used to receive first reference signals from a first port group and a second port group of the network device, respectively, the second port group belongs to a third port group, and the first port group and the third port group are obtained based on the second reference signal; the processing unit is used to generate indication information, the indication information is used to indicate first channel information and channel merging information obtained based on the first reference signal, the first channel information is associated with the first port group, the channel merging information is associated with the first port group and the second port group, the channel merging information is used to merge the second channel information and the first channel information, the second channel information is associated with the third port group, and the second channel information is obtained based on the second reference signal; and the transceiver unit is also used to send the indication information to the network device.

[0060] For further features and beneficial effects, reference may be made to the relevant description in the first aspect.

[0061] In a sixth aspect, a channel information acquisition device is provided. The channel information acquisition device can implement the method in the second aspect or any one of the implementations of the second aspect. For example, the channel information acquisition device can be a chip or a terminal device. The above method can be implemented by software, hardware, or by hardware executing corresponding software.

[0062] In a possible implementation, the device includes: a transceiver unit and a processing unit; wherein: the transceiver unit is used to send a first reference signal on a first port group and a second port group respectively; the transceiver unit is also used to receive indication information, the indication information is used to indicate first channel information and channel merging information obtained based on the first reference signal, the first channel information is associated with the first port group, the channel merging information is associated with the first port group and the second port group, the channel merging information is used to merge the second channel information and the first channel information, the second channel information is associated with a third port group, the second channel information is obtained based on the second reference signal, and the second port group belongs to the third port group; and the processing unit is used to merge the first channel information and the second channel information based on the channel merging information to obtain downlink channel information.

[0063] Alternatively, the transceiver unit is used to receive a second reference signal; the processing unit is used to obtain second channel information based on the second reference signal, and the second channel information is associated with a third port group; the transceiver unit is also used to send a first reference signal on a first port group and a second port group respectively, the second port group belongs to the third port group, and the first port group and the third port group are obtained based on the second reference signal; the processing unit is also used to generate indication information, the indication information is used to indicate first channel information and channel merging information obtained based on the first reference signal, the first channel information is associated with the first port group, the channel merging information is associated with the first port group and the second port group, and the channel merging information is used to merge the second channel information and the first channel information; the transceiver unit is also used to receive indication information; and the processing unit is also used to merge the first channel information and the second channel information based on the channel merging information to obtain downlink channel information.

[0064] Optionally, the processing unit is further used to normalize the second channel information based on the channel information corresponding to the first port in the second port group in the second channel information to obtain sixth channel information; the processing unit is further used to process the sixth channel information based on the channel merging information to obtain seventh channel information; and the processing unit is further used to merge the first channel information and the seventh channel information to obtain the downlink channel information.

[0065] For further features and beneficial effects, please refer to the relevant description in the second aspect.

[0066] In a seventh aspect, a channel information acquisition device is provided. The channel information acquisition device can implement the method in the third aspect or any one of the implementations of the third aspect. For example, the channel information acquisition device can be a chip or a terminal device. The method can be implemented by software, hardware, or by hardware executing corresponding software.

[0067] In one possible implementation, the device includes: a transceiver unit and a processing unit; wherein: the transceiver unit is used to receive a first reference signal from a network device at a first port group and a second port group; the processing unit is used to generate indication information, the indication information is used to indicate first channel information and channel merging information obtained based on the first reference signal, the first channel information is associated with the first port group, the channel merging information is associated with the first port group and the second port group, the channel merging information is used to merge second channel information and the first channel information, the second channel information is associated with the second port group, and the second channel information is obtained based on the second reference signal; and sending the indication information to the network device.

[0068] Alternatively, the transceiver unit is used to send a second reference signal to the network device; the transceiver unit is also used to receive a first reference signal from the network device at a first port group and a second port group, the first port group and the second port group being obtained based on the second reference signal; the processing unit is used to generate indication information, the indication information being used to indicate first channel information and channel merging information obtained based on the first reference signal, the first channel information being associated with the first port group, the channel merging information being associated with the first port group and the second port group, the channel merging information being used to merge second channel information and the first channel information, the second channel information being associated with the second port group, and the second channel information being obtained based on the second reference signal; and the transceiver unit is also used to send the indication information to the network device.

[0069] For further features and beneficial effects, please refer to the relevant description in the third aspect.

[0070] In an eighth aspect, a channel information acquisition device is provided. The channel information acquisition device can implement the method in the fourth aspect or any one of the implementations of the fourth aspect. For example, the channel information acquisition device can be a chip or a terminal device. The above method can be implemented by software, hardware, or by hardware executing corresponding software.

[0071] In one possible implementation, the device includes: a transceiver unit and a processing unit; wherein: the transceiver unit is used to send a first reference signal to a first port group and a second port group of a terminal device; the transceiver unit is also used to receive indication information from the terminal device, the indication information is used to indicate first channel information and channel merging information obtained based on the first reference signal, the first channel information is associated with the first port group, the channel merging information is associated with the first port group and the second port group, the channel merging information is used to merge the second channel information and the first channel information, the second channel information is associated with the second port group, and the second channel information is obtained based on the second reference signal; and the processing unit is used to merge the second channel information and the first channel information based on the channel merging information to obtain downlink channel information.

[0072] Alternatively, the transceiver unit is used to receive a second reference signal from a terminal device; the processing unit is used to obtain second channel information based on the second reference signal; the transceiver unit is also used to send a first reference signal to a first port group and a second port group of the terminal device, the first port group and the second port group are obtained based on the second reference signal; the transceiver unit is also used to receive indication information from the terminal device, the indication information is used to indicate first channel information and channel merging information obtained based on the first reference signal, the first channel information is associated with the first port group, the channel merging information is associated with the first port group and the second port group, the channel merging information is used to merge the second channel information and the first channel information, and the second channel information is associated with the second port group; and the processing unit is also used to merge the second channel information and the first channel information based on the channel merging information to obtain downlink channel information.

[0073] Optionally, the processing unit is further used to normalize the second channel information based on the channel information corresponding to the first port in the second port group in the second channel information to obtain sixth channel information; the processing unit is further used to process the sixth channel information based on the channel merging information to obtain seventh channel information; and the processing unit is further used to merge the first channel information and the seventh channel information to obtain the downlink channel information.

[0074] For further features and beneficial effects, please refer to the relevant description in the fourth aspect.

[0075] In another possible implementation, the channel information acquisition device in the fifth to eighth aspects above includes a processor coupled to a memory; the processor is configured to support the device to perform the corresponding functions in the above channel information acquisition method. The memory is used to couple with the processor, which stores the necessary computer programs (or computer executable instructions) and / or data for the device. Optionally, the channel information acquisition device may also include a communication interface to support communication between the device and other network elements, such as sending or receiving data and / or signals. Exemplarily, the communication interface may be a transceiver, circuit, bus, module or other type of communication interface. Optionally, the memory may be located inside the channel information acquisition device and integrated with the processor; it may also be located outside the channel information acquisition device.

[0076] In another possible implementation, the channel information acquisition device in the fifth to eighth aspects includes a processor and a transceiver, the processor is coupled to the transceiver, and the processor is used to execute a computer program or instruction to control the transceiver to receive and send information; when the processor executes the computer program or instruction, the processor is also used to implement the above method through a logic circuit or execute code instructions. The transceiver can be a transceiver, a transceiver circuit or an input-output interface, which is used to receive signals from other channel information acquisition devices other than the channel information acquisition device and transmit them to the processor or send signals from the processor to other channel information acquisition devices other than the channel information acquisition device. When the channel information acquisition device is a chip, the transceiver is a transceiver circuit or an input-output interface.

[0077] When the channel information acquisition device in the fifth to eighth aspects is a chip, the sending unit may be an output unit, such as an output circuit or a communication interface; the receiving unit may be an input unit, such as an input circuit or a communication interface. When the channel information acquisition device is a terminal device, the sending unit may be a transmitter or a transmitter; the receiving unit may be a receiver or a receiver.

[0078] In a ninth aspect, a communication system is provided, comprising a channel information acquisition device as described in the fifth aspect or any one of the implementations of the fifth aspect, and at least one channel information acquisition device as described in the sixth aspect or any one of the implementations of the sixth aspect.

[0079] In a tenth aspect, a communication system is provided, comprising a channel information acquisition device as described in the seventh aspect or any one of the seventh aspects, and at least one channel information acquisition device as described in the eighth aspect or any one of the eighth aspects.

[0080] In the eleventh aspect, a computer-readable storage medium is provided, on which a computer program or instruction is stored. When the program or instruction is executed by a processor, the method described in the first aspect or any one of the implementations of the first aspect is implemented, or the method described in the second aspect or any one of the implementations of the second aspect is implemented, or the method described in the third aspect or any one of the implementations of the third aspect is implemented, or the method described in the fourth aspect or any one of the implementations of the fourth aspect is implemented.

[0081] In the twelfth aspect, a computer program product is provided, which, when executed on a computing device, implements the method as described in the first aspect or any one of the implementations of the first aspect, or implements the method as described in the second aspect or any one of the implementations of the second aspect, or implements the method as described in the third aspect or any one of the implementations of the third aspect, or implements the method as described in the fourth aspect or any one of the implementations of the fourth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0082] Figure 1 is a schematic diagram of the architecture of a communication system 1000 applied in an embodiment of the present application;

[0083] Figure 2 It is a basic flow chart of SRS estimation by network equipment and terminal equipment;

[0084] Figure 3 It is a basic flow chart of CSI estimation by network equipment and terminal equipment;

[0085] Figure 4 It is a flow chart of a method for acquiring channel information provided by an embodiment of the present application;

[0086] Figure 5 It is a schematic diagram of obtaining channel information when there is a difference in energy between ports of a network device in an example of the present application;

[0087] Figure 6 It is a flowchart of another channel information acquisition method provided in an embodiment of the present application;

[0088] Figure 7 It is a schematic diagram of obtaining channel information when there is a difference in energy between ports of a terminal device in an example of the present application;

[0089] Figure 8 It is a structural schematic diagram of a channel information acquisition device provided in an embodiment of the present application;

[0090] Fig. 9 It is a structural diagram of another channel information acquisition device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0091] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0092] The technical solution provided by this application can be applied to various communication systems, for example, it can be applied to the fifth generation (5 thThe technical solution provided in this application may be applied to 5G (5G generation) communication systems, future evolution systems or multiple communication convergence systems, and may also be applied to existing communication systems. The application scenarios of the technical solution provided in this application may include multiple scenarios, such as machine to machine (M2M), macro and micro communications, enhanced mobile broadband (eMBB), ultra-high reliability and ultra-low latency communication (ultra-reliable&low latency communication, uRLLC) and massive machine type communication (mMTC). These scenarios may include, but are not limited to: communication scenarios between terminal devices and terminal devices, communication scenarios between network devices and network devices, communication scenarios between network devices and terminal devices, etc. Among them, the network equipment includes network equipment and core network equipment. The following description will be given by taking the scenarios applied to communication between network devices and terminal devices as examples.

[0093] Figure 1 FIG. 1 is a schematic diagram of the architecture of a communication system 1000 used in an embodiment of the present application. Figure 1 As shown, the communication system includes a wireless access network 100 and a core network 200. Optionally, the communication system 1000 may also include the Internet 300. The wireless access network 100 may include at least one network device (such as Figure 1 110a and 110b), and may also include at least one terminal device (such as Figure 1 120a-120j in the figure). The terminal device is connected to the network device by wireless means, and the network device is connected to the core network by wireless or wired means. The core network device and the network device can be independent and different physical devices, or the functions of the core network device and the logical functions of the network device can be integrated on the same physical device, or the functions of some core network devices and some network devices can be integrated on one physical device. Terminal devices and network devices can be connected to each other by wire or wireless means. Figure 1 This is just a schematic diagram. The communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices. Figure 1 Not drawn in.

[0094] A network device can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a fifth generation (5G) mobile communication system, a next generation base station in a sixth generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc.; it can also be a module or unit that performs some functions of a network device, for example, a centralized unit (CU) or a distributed unit (DU). A network device can be a macro base station (such as Figure 1 110a), or a micro base station or an indoor station (such as Figure 1 110b), may also be a relay node or a donor node, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.

[0095] Terminal devices may also be referred to as terminals, user equipment (UE), mobile stations, mobile terminal devices, etc. Terminal devices can be widely used in various scenarios, for example, device-to-device (D2D), vehicle to everything (V2X) communication, machine-type communication (MTC), Internet of Things (IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. Terminal devices may be mobile phones, tablet computers, computers with wireless transceiver functions, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal devices.

[0096] The network equipment and terminal equipment can be fixed or movable. The network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on aircraft, balloons and artificial satellites in the air. The embodiments of the present application do not limit the application scenarios of the network equipment and terminal equipment.

[0097] The roles of network devices and terminal devices can be relative, for example, Figure 1The helicopter or drone 120i in the figure can be configured as a mobile network device. For the terminal devices 120j that access the wireless access network 100 through 120i, the terminal device 120i is a network device; but for the network device 110a, 120i is a terminal device, that is, 110a and 120i communicate through the wireless air interface protocol. Of course, 110a and 120i can also communicate through the interface protocol between network devices. In this case, relative to 110a, 120i is also a network device. Therefore, network devices and terminal devices can be collectively referred to as communication devices. Figure 1 110a and 110b in the figure may be referred to as communication devices having network device functions. Figure 1 120a-120j in the figure can be called communication devices with terminal equipment functions.

[0098] Network devices and terminal devices, network devices and network devices, and terminal devices and terminal devices can communicate through authorized spectrum, unauthorized spectrum, or both; can communicate through spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or spectrum below 6 GHz and spectrum above 6 GHz. The embodiments of the present application do not limit the spectrum resources used for wireless communication.

[0099] In the embodiments of the present application, the functions of the network device may also be performed by a module (such as a chip) in the network device, or by a control subsystem including the network device function. The control subsystem including the network device function here may be a control center in the above-mentioned application scenarios such as smart grid, industrial control, smart transportation, and smart city. The functions of the terminal device may also be performed by a module (such as a chip or a modem) in the terminal device, or by a device including the terminal device function.

[0100] In this application, the network device sends a downlink signal or downlink information to the terminal device, and the downlink information is carried on the downlink channel; the terminal device sends an uplink signal or uplink information to the network device, and the uplink information is carried on the uplink channel. In order to communicate with the network device, the terminal device needs to establish a wireless connection with the cell controlled by the network device. The cell with which the terminal device has established a wireless connection is called the service cell of the terminal device. When the terminal device communicates with the service cell, it will also be interfered by signals from neighboring cells.

[0101] Taking the 5G communication system as an example, the 5G communication system has higher requirements for system capacity, spectrum efficiency, etc. In the 5G communication system, the application of massive multiple-input multiple-output (massive MIMO) technology plays a vital role in improving the spectrum efficiency of the system. When using multiple-input multiple-output (MIMO) technology, the network device needs to precode the data before sending it to the terminal device. How to perform precoding depends on the channel state information (CSI) fed back by the terminal device to the network device, so accurate CSI information is an important factor affecting system performance.

[0102] In a TDD system, since the uplink channel and the downlink channel use the same frequency band, they are reciprocal. Network equipment can use the reciprocity of the uplink and downlink channels to obtain the CSI of the downlink channel through the uplink SRS channel estimation, and then perform precoding. Figure 2 As shown, it is a basic flow chart of SRS estimation by network equipment and terminal equipment. The flow includes the following steps: S201. The network equipment sends the configuration information of channel measurement to the terminal equipment, and the configuration information is used to notify the terminal equipment of the time and behavior of SRS pilot measurement, that is, to inform the terminal equipment on which resource to send SRS; S202. The terminal equipment sends SRS to the network equipment for channel estimation according to the configuration information; and S203. The network equipment measures according to the SRS sent by the terminal equipment, restores the downlink channel through channel estimation, and sends data according to the CSI of the estimated channel. Among them, the network equipment determines the precoding of data transmitted to the terminal equipment according to the estimated channel.

[0103] In the frequency division duplex (FDD) system, the interval between the uplink and downlink frequency bands is greater than the bandwidth, so there is no complete reciprocity between the uplink and downlink channels. In the traditional FDD system, the reciprocity of the uplink and downlink channels cannot be used, and the terminal device needs to feedback the CSI of the downlink channel to the network device. Figure 3As shown, it is a basic flow chart of CSI estimation by network equipment and terminal equipment. The process includes the following steps: S301. The network equipment needs to send channel measurement configuration information to the terminal equipment first. The configuration information is used for channel measurement configuration, notifying the terminal equipment of the time and behavior of channel measurement, that is, informing the terminal equipment on which resource to measure the channel state information-reference signal (CSI-RS); S302. The network equipment sends CSI-RS to the terminal equipment for channel measurement; S303. The terminal equipment measures according to the CSI-RS sent by the network equipment, calculates the final CSI feedback amount, and feeds back the CSI to the network equipment; and S304. The network equipment then sends data according to the CSI fed back by the terminal equipment. Among them, the network device is used to determine the number of streams for transmitting data to the terminal device based on the channel rank indicator (RI) fed back by the terminal device; the network device is used to determine the modulation order and the channel coding code rate for transmitting data to the terminal device based on the channel quality indicator (CQI) fed back by the terminal device; the network device is used to determine the precoding of data transmitted to the terminal device based on the PMI fed back by the terminal device.

[0104] Therefore, there are several ways to obtain channel information:

[0105] The first implementation is that the downlink precoding weights may be determined by using the channel estimation results obtained by SRS measurement and estimation.

[0106] The second implementation is that the downlink precoding weights may also be determined based on the PMI fed back by the terminal device.

[0107] The third implementation is that the network equipment in the TDD system can determine the downlink precoding weights through the SRS channel estimation results, or determine the downlink precoding weights based on the PMI fed back by the terminal equipment. For terminal equipment with different SRS SINRs, an SRS / PMI weight switching scheme can be considered. For terminal equipment whose SRS SINR is higher than a certain threshold, the network equipment uses the SRS channel estimation to obtain the downlink precoding weights; for terminal equipment whose SRS SINR is lower than a certain threshold, the accuracy of the SRS estimation is low, and the estimated channel information is inaccurate. At this time, the network equipment can obtain the downlink CSI through the terminal equipment feedback, and use the fed back PMI information to determine the downlink precoding weights.

[0108] In practical applications, due to the limited antenna surface, new antenna unit designs may be considered. Tri-polarized antenna arrays can be considered at both the transmitting and receiving ends, so as to expand ports on a limited antenna surface and improve system performance. However, for tri-polarized antenna arrays, there is a problem of differences in signal energy corresponding to ports between polarizations. The measurement signal of the third polarized antenna port is weaker than that of the traditional dual-polarized antenna port, and the corresponding SINR of the SRS signal is lower. The accuracy of the channel information corresponding to the third polarized antenna port during SRS channel estimation is limited.

[0109] Network equipment or terminal equipment may have the problem of signal energy differences between antenna ports.

[0110] In this context, if the first implementation is adopted to obtain the downlink precoding weights through SRS channel estimation, the third polarization channel is not accurately measured due to the low SNR corresponding to the third polarization antenna port, resulting in low accuracy of the channel measurement result.

[0111] If the second or third implementation is adopted, it is necessary to feed back complete downlink channel information corresponding to all antenna ports. For an antenna array including a large number of antenna ports, the PMI feedback overhead is large.

[0112] In order to improve the accuracy of acquired channel information when there is a difference in signal energy between ports of a network device or a terminal device, the present application provides a channel information acquisition scheme. When there is a difference in signal energy between ports of a communication device, channel information associated with a port group is acquired based on a second reference signal. The communication device then sends a first reference signal on two port groups, obtains channel information and channel merging information associated with another port group based on the first reference signal, and merges the channel information associated with one port group obtained based on the second reference signal and the channel information associated with another port group obtained based on the first reference signal based on the channel merging information, thereby obtaining complete channel information with higher accuracy, thereby improving the accuracy of the acquired channel information.

[0113] The following describes in detail the channel information acquisition method provided by the embodiment of the present application in conjunction with the accompanying drawings:

[0114] In this application, "sending information to... (such as a terminal device)" or the related illustrations in the accompanying drawings can be understood as the destination end of the information is the terminal device. It can include sending information to the terminal device directly or indirectly. "Receiving information from... (such as a terminal device)" or "receiving information from... (such as a terminal device)", or the related illustrations in the accompanying drawings can be understood as the source end of the information is the terminal device, which can include receiving information from the terminal device directly or indirectly. The information may be processed as necessary between the source end and the destination end of the information transmission, such as format changes, etc., but the destination end can understand the valid information from the source end. Similar expressions in this application can be understood similarly and will not be repeated here.

[0115] The channel state information feedback method provided by the embodiment of the present application is described in detail below. It can be understood that the present application uses the terminal device and the network device as an example to illustrate the execution subject of the interactive schematic, but the present application does not limit the execution subject of the interactive schematic. For example, the terminal device in the method provided by the present application may also be a chip, a chip system, or a processor applied to the terminal device, or a logical node, a logical module, or software that can implement all or part of the terminal device; the network device in the method provided by the present application may also be a chip, a chip system, or a processor applied to the network device, or a logical node, a logical module, or software that can implement all or part of the network device function.

[0116] like Figure 4 FIG. 1 is a flow chart of a method for acquiring channel information provided by an embodiment of the present application. Exemplarily, the method may include the following steps:

[0117] S401. The terminal device sends a second reference signal to the network device. Correspondingly, the network device receives the second reference signal.

[0118] The terminal device sends a second reference signal (eg, SRS) to the network device, and the network device receives the second reference signal at all ports of the antenna array.

[0119] However, the energy intensity of the second reference signal received at each port of the antenna array of the network device is different. Figure 5As shown, it is a schematic diagram of obtaining channel information when there is a difference in energy between the ports of the network device of the example of the present application. The network device divides the ports of the network device into a first port group and a third port group according to the energy intensity of the second reference signal received at each port of the antenna array. Among them, the energy intensity of the second reference signal on the first port group is lower than the energy intensity of the second reference signal on the third port group. Therefore, the first port group can be called a weaker port group, and the third port group can be called a stronger port group. The channel information estimated by the network device based on the measurement result of the second reference signal received from the first port group is inaccurate or the accuracy is insufficient. Exemplarily, when the network device adopts a three-polarization antenna array, the first port group can be the third polarization port in the three-polarization antenna array, and the third port group can be a cross-polarization port in the three-polarization antenna array.

[0120] It can be understood that the above-mentioned port division step is optional, and the first port group and the third port group of the above-mentioned network device may also be predefined by the protocol or preconfigured.

[0121] S402. The network device obtains, based on the second reference signal, channel information from the antenna port of the terminal device to the third port group of the network device as second channel information H1.

[0122] S403. The network device sends a first reference signal on the first port group and the second port group respectively. Correspondingly, the terminal device receives the first reference signal from the first port group and the second port group of the network device respectively.

[0123] Still refer to Figure 5 , the network device is configured with two groups of ports: a first port group and a second port group, wherein the first port group is used to associate with the weaker antenna port; the second port group is used to associate with the stronger antenna port, and may include some or all of the ports of the third port group, that is, the second port group belongs to the third port group. For example, the second port group may include one or more ports.

[0124] The network device sends a first reference signal (eg, CSI-RS) on the first port group and the second port group, respectively. Correspondingly, the terminal device receives the first reference signal from the first port group and the second port group of the network device, respectively.

[0125] It should be noted that a port group includes one or more ports; the one or more ports are both transmitting antenna ports and receiving antenna ports.

[0126] S404. The terminal device sends indication information to the network device. Correspondingly, the network device receives the indication information.

[0127] After receiving the first reference signals from the first port group and the second port group of the network device respectively, the terminal device measures the first reference signals of the first port group and the second port group of the network device respectively, wherein the energy intensity of the first reference signal on the first port group is lower than the energy intensity of the first reference signal on the second port group.

[0128] The terminal device obtains the third channel information H2 according to the measurement result of the first reference signal received from the first port group of the network device. The third channel information is obtained based on the first reference signal and is associated with the first port group.

[0129] Further, the terminal device normalizes and quantizes the third channel information H2 to obtain the first channel information H′2. The first channel information is associated with the first port group. Exemplarily, in, is the normalized reference, or called the reference channel information, with an amplitude of a and a phase of The normalization reference is determined based on the third channel information H2 obtained from actual measurement. The specific determination method can refer to the existing technology. By normalizing and quantizing the third channel information H2, the terminal device can reduce feedback overhead when subsequently sending the first channel information H′2 to the network device.

[0130] The terminal device selects the first port in the second port group according to the measurement result of the first reference signal received from the second port group of the network device, and obtains the channel information of the first port as the fourth channel information, whose amplitude is |hmax| and phase is And use the same normalization basis as the channel information of the first port group Normalize and quantize the fourth channel information to obtain the inter-port channel merging information That is, the channel merging information is obtained based on the fourth channel information and the reference channel information. The amplitude of the channel merging information β is γ and the phase is θ. The channel merging information β is associated with the first port group and the second port group. The channel merging information β is used to merge the second channel information H1 and the first channel information H′2. The first port is the port with the strongest signal strength in the second port group, or the port predefined by the protocol, or the port configured by the network device, or the port indicated by the terminal device. Since the first channel information is obtained by feedback, the normalization benchmarks of the first channel information and the second channel information are different. By using the same normalization benchmark for normalization and quantization, the accuracy of channel merging can be improved.

[0131] After obtaining the first channel information H′2 and the channel merging information β, the terminal device sends indication information to the network device. The indication information is used to indicate the first channel information H′2 and the channel merging information β obtained based on the first reference signal. Exemplarily, the indication information is used to indicate the channel merging information β, and the indication information may include the amplitude γ and phase θ of the channel merging information β.

[0132] S405. The network device combines the first channel information and the second channel information based on the channel combining information to obtain fifth channel information.

[0133] After receiving the above indication information, the network device combines the first channel information H′2 and the second channel information H1 based on the channel combining information β to obtain the fifth channel information.

[0134] Exemplarily, the above merging process may include the following steps:

[0135] 1) The network device normalizes the second channel information based on the channel information corresponding to the first port in the second port group in the second channel information to obtain sixth channel information. Figure 5 The network device normalizes and quantizes the second channel information H1 obtained in step S402 according to the channel information corresponding to the first port in the second port group in the second channel information to obtain the sixth channel information

[0136] 2) Based on the channel merging information β, the sixth channel information is processed to obtain the seventh channel information after amplitude and phase adjustment

[0137] 3) Combine the first channel information H′2 and the seventh channel information H′1 to obtain the fifth channel information, that is, the full channel information [H′1, H′2] T ,like Figure 5 The fifth channel information is also the downlink channel information; in the TDD system, the fifth information also corresponds to the uplink channel information.

[0138] According to a channel information acquisition method provided by an embodiment of the present application, when there is a difference in signal energy between ports of a network device, channel information associated with a port group is acquired based on a second reference signal, and a first reference signal is sent on the two port groups again. The terminal device acquires channel information and channel merging information associated with another port group based on the first reference signal and reports the information to the network device. The network device merges the channel information associated with one port group acquired based on the second reference signal and the channel information associated with another port group acquired based on the first reference signal based on the channel merging information, thereby acquiring complete channel information with higher accuracy, thereby improving the accuracy of the acquired channel information.

[0139] The above embodiment describes how to improve the accuracy of the acquired channel information when there is a difference in signal energy between ports of a network device. The following embodiment will describe how to improve the accuracy of the acquired channel information when there is a difference in signal energy between ports of a terminal device.

[0140] like Figure 6 FIG. 1 is a flow chart of another method for acquiring channel information provided in an embodiment of the present application. Exemplarily, the method may include the following steps:

[0141] S601. The terminal device sends a second reference signal to the network device. Correspondingly, the network device receives the second reference signal.

[0142] The terminal device sends a second reference signal (e.g., SRS) to the network device, and the network device receives the second reference signal. The network device can detect the energy difference of the second reference signal from each port of the terminal device, thereby dividing the port of the terminal device into a fourth port group and a fifth port group based on the energy difference of each port of the terminal device. Optionally, the network device can indicate information of the fourth port group and the fifth port group of the terminal device to the terminal device.

[0143] As another alternative way to divide the port groups, the network device sends a third reference signal (e.g., CSI-RS) to the terminal device, and the terminal device receives the third reference signal and performs measurements. The terminal device can divide the ports of the terminal device into a fourth port group and a fifth port group according to the energy intensity of the third reference signal received at each port of the terminal device. Among them, the energy intensity of the reference signal on the fourth port group is lower than the energy intensity of the reference signal on the fifth port group, so the fourth port group can be called a weaker port group, and the fifth port group can be called a stronger port group. The channel information estimated by the terminal device based on the measurement result of the reference signal received from the network device on its fourth port group is inaccurate, or the accuracy is insufficient. Exemplarily, when the terminal device adopts a three-polarized antenna array, the fourth port group can be the third polarized port in the three-polarized antenna array, and the fifth port group can be the cross-polarized port in the three-polarized antenna array. Optionally, the terminal device can also indicate the information of the fourth port group and the fifth port group of the terminal device to the network device.

[0144] It is understandable that the above-mentioned division of the ports of the terminal device is optional, and the port group of the terminal device may also be predefined through network configuration or protocol.

[0145] S602. The network device obtains, based on the second reference signal, channel information from the fifth port group of the terminal device to the network device as second channel information.

[0146] Furthermore, when the network device receives the second reference signal, it can also obtain channel information from the fifth port group of the terminal device to the network device based on the second reference signal and the division of the ports of the terminal device as the second channel information. Figure 7 As shown, it is a schematic diagram of obtaining channel information when there is a difference in energy between ports of the terminal device of the example of the present application. The network device can also obtain channel information from the fifth port group of the terminal device to the network device as the second channel information G1.

[0147] S603. The network device sends a first reference signal to the fourth port group and the fifth port group of the terminal device. Correspondingly, the terminal device receives the first reference signal from the network device at the fourth port group and the fifth port group.

[0148] Still refer to Figure 7 , the network device sends a first reference signal (eg, CSI-RS) to the terminal device. Correspondingly, the terminal device receives the first reference signal from the network device on the fourth port group and the fifth port group respectively.

[0149] It should be noted that a port group includes one or more ports; the one or more ports are both transmitting antenna ports and receiving antenna ports.

[0150] S604. The terminal device sends indication information to the network device. Correspondingly, the network device receives the indication information.

[0151] After receiving the first reference signal from the network device on the fourth port group and the fifth port group, the terminal device measures the first reference signal received on the fourth port group and the fifth port group, respectively, wherein the energy intensity of the first reference signal on the fourth port group is lower than the energy intensity of the first reference signal on the fifth port group.

[0152] The terminal device obtains the third channel information G2 according to the measurement result of the first reference signal received from the network device on the fourth port group. The third channel information is obtained based on the first reference signal and is associated with the fourth port group.

[0153] Further, the terminal device normalizes and quantizes the third channel information G2 to obtain the first channel information G′2. The first channel information is associated with the fourth port group. Exemplarily, in, is a normalized reference, or referred to as reference channel information, with an amplitude of ρ and a phase of ω2. The normalized reference is determined based on the third channel information G2 obtained by actual measurement, and the specific determination method can refer to the existing technology. By normalizing and quantizing the third channel information G2, the terminal device can reduce the feedback overhead when sending the first channel information G′2 to the network device in the subsequent process.

[0154] The terminal device selects the first port in the fifth port group according to the measurement result of the first reference signal received on the fifth port group, obtains the channel information of the first port as the fourth channel information, whose amplitude is |gmax|, the phase is ω1, and uses the same normalization reference as the channel information of the fourth port group Normalize and quantize the fourth channel information to obtain the inter-port channel merging information That is, the channel merging information is obtained based on the fourth channel information and the reference channel information. The amplitude of the channel merging information δ is ρ, and the phase is ω2. The channel merging information δ is associated with the fourth port group and the fifth port group. The channel merging information δ is used to merge the second channel information G1 and the first channel information G′2. The first port is the port with the strongest signal strength in the fifth port group, or the port predefined by the protocol, or the configured port. Since the first channel information is obtained by feedback, the normalization benchmarks of the first channel information and the second channel information are different. By using the same normalization benchmark for normalization and quantization, the accuracy of channel merging can be improved.

[0155] After obtaining the first channel information G′2 and the channel merging information δ, the terminal device sends indication information to the network device. The indication information is used to indicate the first channel information G′2 and the channel merging information δ obtained based on the first reference signal. Exemplarily, the indication information is used to indicate the channel merging information δ, and the indication information may include the amplitude r and phase φ of the channel merging information δ.

[0156] S605. The network device combines the first channel information and the second channel information based on the channel combining information to obtain fifth channel information.

[0157] After receiving the above instruction information, the network device combines the first channel information G′2 and the second channel information G1 based on the channel combining information δ to obtain the fifth channel information.

[0158] Exemplarily, the above merging process may include the following steps:

[0159] 1) The network device normalizes the second channel information based on the channel information corresponding to the first port in the fifth port group in the second channel information to obtain the sixth channel information. Figure 7 The network device normalizes and quantizes the second channel information G1 obtained in step S602 according to the channel information corresponding to the first port in the fifth port group in the second channel information to obtain the sixth channel information

[0160] 2) Based on the channel merging information δ, the sixth channel information is processed to obtain the seventh channel information after amplitude and phase adjustment

[0161] 3) Combine the first channel information G′2 and the seventh channel information G′1 to obtain the fifth channel information, that is, the full channel information [G′1, G′2] T ,like Figure 7 The fifth channel information is also the downlink channel information; in the TDD system, the fifth information also corresponds to the uplink channel information.

[0162] According to a channel information acquisition method provided by an embodiment of the present application, when there is a difference in signal energy between ports of a terminal device, a network device acquires channel information associated with a port group of the terminal device based on a second reference signal, and then sends a first reference signal to two port groups of the terminal device. The terminal device acquires channel information and channel merging information associated with another port group based on the first reference signal and reports the information to the network device. The network device merges the channel information associated with one port group obtained based on the second reference signal and the channel information associated with another port group obtained based on the first reference signal based on the channel merging information, thereby acquiring complete channel information with higher accuracy, thereby improving the accuracy of the acquired channel information.

[0163] It is understandable that in order to implement the functions in the above embodiments, the network device and the terminal device include hardware structures and / or software modules corresponding to the execution of each function. It should be easily appreciated by those skilled in the art that, in combination with the units and method steps of each example described in the embodiments disclosed in this application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.

[0164] Figure 8 and Fig. 9 A schematic diagram of the structure of a possible channel information acquisition device provided in an embodiment of the present application. These channel information acquisition devices can be used to implement the functions of the terminal device or network device in the above method embodiment, and thus can also achieve the beneficial effects of the above method embodiment. In an embodiment of the present application, the channel information acquisition device can be as follows: Figure 1 One of the terminal devices 120a-120j shown may also be Figure 1 The network device 110a or 110b shown may also be a module (such as a chip) applied to a terminal device or a network device.

[0165] like Figure 8 As shown, the channel information acquisition device 800 includes a processing unit 810 and a transceiver unit 820. The channel information acquisition device 800 is used to implement the above Figure 4 or Figure 6 The functions of the terminal device or the network device in the method embodiment shown in FIG.

[0166] When the channel information acquisition device 800 is used to implement Figure 4 or Figure 6 In the method embodiment shown in FIG. 1 , the functions of the terminal device are as follows: the transceiver unit 820 is used to implement the following Figure 4 The functions of the terminal device in steps S401, S403 and S404 in the embodiment shown; or, the transceiver unit 820 is used to implement the following Figure 6 Functions of the terminal device in steps S601, S603 and S604 in the illustrated embodiment.

[0167] When the channel information acquisition device 800 is used to implement Figure 4 or Figure 6 In the method embodiment shown, the functions of the network device are: the transceiver unit 820 is used to implement the following Figure 4 The functions of the network device in steps S401, S403 and S404 in the illustrated embodiment, and the processing unit 810 are used to implement the following Figure 4 Steps S402 and S405 in the embodiment shown; or, the transceiver unit 820 is used to implement the following Figure 6 The functions of the network device in steps S601, S603 and S604 in the illustrated embodiment, and the processing unit 810 are used to implement the following Figure 6 Steps S602 and S605 in the illustrated embodiment.

[0168] For more detailed description of the processing unit 810 and the transceiver unit 820, please refer to Figure 4 or Figure 6 The relevant description in the method embodiment shown is directly obtained and will not be repeated here.

[0169] When the channel information acquisition device is a chip applied to a terminal device, the terminal device chip implements the functions of the terminal device in the above method embodiment. The terminal device chip receives information from other modules in the terminal device (such as a radio frequency module or an antenna), and the information is sent by the network device to the terminal device; or the terminal device chip sends information to other modules in the terminal device (such as a radio frequency module or an antenna), and the information is sent by the terminal device to the network device.

[0170] When the channel information acquisition device is a chip applied to a network device, the network device chip implements the function of the network device in the above method embodiment. The network device chip receives information from other modules in the network device (such as a radio frequency module or an antenna), and the information is sent by the terminal device to the network device; or the network device chip sends information to other modules in the network device (such as a radio frequency module or an antenna), and the information is sent by the network device to the terminal device.

[0171] In addition, it should be noted that the aforementioned transceiver unit and / or processing unit can be implemented through a virtual module, for example, the processing unit can be implemented through a software function unit or a virtual device, and the transceiver unit can be implemented through a software function or a virtual device. Alternatively, the processing unit or the transceiver unit can also be implemented through a physical device, for example, if the device is implemented using a chip / chip circuit, the transceiver unit can be an input-output circuit and / or a communication interface, performing input operations (corresponding to the aforementioned receiving operations) and output operations (corresponding to the aforementioned sending operations); the processing unit is an integrated processor or microprocessor or integrated circuit.

[0172] like Fig. 9 As shown, the channel information acquisition device 900 includes a processor 910 and may also include an interface circuit 920. The processor 910 and the interface circuit 920 are coupled to each other. It can be understood that the interface circuit 920 can be a transceiver or an input-output interface. Optionally, the channel information acquisition device 900 may also include a memory 930 (indicated by a dotted line in the figure) for storing instructions executed by the processor 910 or storing input data required by the processor 910 to execute instructions or storing data generated after the processor 910 executes instructions.

[0173] When the channel information acquisition device 900 is used to implement Figure 4 or Figure 6 In the method embodiment shown in FIG. 1 , the functions of the terminal device are as follows: the interface circuit 920 is used to implement the following Figure 4 The functions of the terminal device in steps S401, S403 and S404 in the embodiment shown; or, the interface circuit 920 is used to implement the following Figure 6 Functions of the terminal device in steps S601, S603 and S604 in the illustrated embodiment.

[0174] When the channel information acquisition device 900 is used to implement Figure 4 or Figure 6 In the method embodiment shown, the functions of the network device are: the interface circuit 920 is used to implement the following Figure 4 In the embodiment shown, the functions of the network device in steps S401, S403 and S404, and the processor 910 are used to implement the following Figure 4 Steps S402 and S405 in the embodiment shown; or, the interface circuit 920 is used to implement the following Figure 6 In the embodiment shown, the functions of the network device in steps S601, S603 and S604, and the processor 910 are used to implement the following Figure 6 Steps S602 and S605 in the illustrated embodiment.

[0175] For a more detailed description of the processor 910 and the interface circuit 920, please refer to Figure 4or Figure 6 The relevant description in the method embodiment shown is directly obtained and will not be repeated here.

[0176] The division of modules in this application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional module in each example of this application may be integrated into one processor, or may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated modules may be implemented in the form of hardware or in the form of software functional modules.

[0177] It is understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0178] An embodiment of the present application further provides a computer-readable storage medium, in which a computer program or instruction is stored. When the computer program or instruction is executed, the method in the above embodiment is implemented.

[0179] The embodiments of the present application also provide a computer program product including instructions, which, when executed on a computer, enables the computer to execute the method in the above embodiments.

[0180] An embodiment of the present application also provides a communication system, including the above-mentioned communication device.

[0181] The embodiment of the present application also provides a circuit, which is coupled to a memory and is used to execute the method shown in the above embodiment. The circuit may include a chip circuit.

[0182] When the above-mentioned communication device is a module applied to a network device, the network device module implements the function of the network device in the above-mentioned method embodiment. The network device module receives information from other modules in the network device (such as a radio frequency module or an antenna), and the information is sent by the UE to the network device; or, the network device module sends information to other modules in the network device (such as a radio frequency module or an antenna), and the information is sent by the network device to the UE. The network device module here can be a baseband chip of a network device, or a CU, DU or other module, or a device under an open radio access network (open radio access network, O-RAN) architecture, such as an open CU, an open DU and other devices.

[0183] It should be noted that the above units or one or more of the units can be implemented by software, hardware or a combination of the two. When any of the above units or units is implemented by software, the software exists in the form of computer program instructions and is stored in a memory, and a processor can be used to execute the program instructions and implement the above method flow.

[0184] In this application, the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or all or part of the circuits in the aforementioned devices for implementing processing functions, which may implement or execute the methods, steps and logic block diagrams disclosed in this application. A general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the method disclosed in this application may be directly embodied as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0185] When the above units or units are implemented in hardware, the hardware can be any one or any combination of a CPU, a microprocessor, a digital signal processing (DSP) chip, a microcontroller unit (MCU), an artificial intelligence processor, an ASIC, a SoC, an FPGA, a PLD, a dedicated digital circuit, a hardware accelerator or a non-integrated discrete device, which can run the necessary software or not rely on the software to execute the above method flow.

[0186] Optionally, the embodiment of the present application further provides a chip system, including: at least one processor and an interface, the at least one processor is coupled to a memory via the interface, and when the at least one processor runs a computer program or instruction in the memory, the chip system executes a method in any of the above method embodiments. Optionally, the chip system may be composed of a chip, or may include a chip and other discrete devices, which is not specifically limited in the embodiment of the present application.

[0187] The memory in the present application may also be a circuit or any other device capable of implementing a storage function, for storing program instructions and / or data. The memory is any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer, but is not limited thereto. For example, the memory may be a non-volatile memory, such as a digital versatile disc (DVD), a hard disk drive (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), such as a random-access memory (RAM).

[0188] It should be understood that in the description of the present application, unless otherwise specified, " / " indicates that the objects associated before and after are in an "or" relationship, for example, A / B can represent A or B; wherein A and B can be singular or plural. Also, in the description of the present application, unless otherwise specified, "multiple" refers to two or more than two. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, wherein a, b, c can be single or multiple. In addition, in order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first", "second", etc. are used to distinguish the same items or similar items with substantially the same functions and effects. Those skilled in the art can understand that the words "first", "second", etc. do not limit the quantity and execution order, and the words "first", "second", etc. do not limit them to be necessarily different. Meanwhile, in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete manner for ease of understanding.

[0189] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using a software program, 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 loading and executing computer program instructions on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may 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 may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center.

[0190] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art may understand and implement other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in a claim. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0191] It is understood that the various numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. The size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic.

[0192] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0193] The components in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs. Those skilled in the art can combine or combine the different embodiments and features of the different embodiments described in this specification.

[0194] In the present application, under the premise of no logical contradiction, the examples may reference each other, for example, the methods and / or terms between method embodiments may reference each other, for example, the functions and / or terms between device embodiments may reference each other, for example, the functions and / or terms between device examples and method examples may reference each other.

Claims

1. A method for acquiring channel information, characterized in that: The method comprises: receiving a first reference signal from a first port group and a second port group of a network device; Send indication information to the network device, where the indication information is used to indicate first channel information and channel merging information obtained based on the first reference signal, the first channel information is associated with the first port group, the channel merging information is associated with the first port group and the second port group, the channel merging information is used to merge second channel information and the first channel information, the second channel information is associated with a third port group, the second channel information is obtained based on a second reference signal, and the second port group belongs to the third port group.

2. The method according to claim 1, characterized in that The first channel information is obtained by normalizing and quantizing third channel information based on reference channel information, the third channel information is obtained based on the first reference signal, and the third channel information is associated with the first port group.

3. The method according to claim 2, characterized in that The channel combination information is obtained based on fourth channel information and the reference channel information, where the fourth channel information is obtained by measuring the first reference signal on the first port in the second port group.

4. The method according to claim 3, characterized in that The first port is a port with the strongest signal strength in the second port group, or a port predefined by a protocol, or a port configured by the network device, or a port indicated by a terminal device.

5. The method according to claim 3 or 4, characterized in that The channel combination information includes amplitude information and phase information, and the amplitude information and the phase information are obtained based on the fourth channel information and the reference channel information.

6. The method according to any one of claims 1 to 5, characterized in that An energy intensity of the first reference signal on the first port group is lower than an energy intensity of the first reference signal on the second port group.

7. The method according to any one of claims 1 to 6, characterized in that The first reference signal is a channel state information reference signal CSI-RS, and the second reference signal is a sounding reference signal SRS.

8. A method for acquiring channel information, characterized in that: The method comprises: sending a first reference signal on the first port group and the second port group; receiving indication information, where the indication information is used to indicate first channel information and channel merging information obtained based on the first reference signal, where the first channel information is associated with the first port group, where the channel merging information is associated with the first port group and the second port group, where the channel merging information is used to merge second channel information with the first channel information, where the second channel information is associated with a third port group, where the second channel information is obtained based on a second reference signal, and where the second port group belongs to the third port group; Based on the channel merging information, the first channel information and the second channel information are merged to obtain downlink channel information.

9. The method according to claim 8, characterized in that The first channel information is obtained by normalizing and quantizing third channel information based on reference channel information, the third channel information is obtained based on the first reference signal, and the third channel information is associated with the first port group.

10. The method according to claim 9, characterized in that The channel combination information is obtained based on fourth channel information and the reference channel information, where the fourth channel information is obtained by measuring the first reference signal on the first port in the second port group.

11. The method according to claim 10, characterized in that The first port is a port with the strongest signal strength in the second port group, or a port predefined by a protocol, or a port configured by a network device, or a port indicated by a terminal device.

12. The method according to claim 10 or 11, characterized in that The channel combination information includes amplitude information and phase information, and the amplitude information and the phase information are obtained based on the fourth channel information and the reference channel information.

13. The method according to any one of claims 10 to 12, characterized in that The combining the first channel information and the second channel information based on the channel combining information to obtain downlink channel information includes: Normalizing the second channel information based on the channel information corresponding to the first port in the second port group in the second channel information to obtain sixth channel information; Processing the sixth channel information based on the channel merging information to obtain seventh channel information; The first channel information and the seventh channel information are combined to obtain the downlink channel information.

14. The method according to any one of claims 8 to 13, characterized in that An energy intensity of the first reference signal on the first port group is lower than an energy intensity of the first reference signal on the second port group.

15. The method according to any one of claims 8 to 14, characterized in that The first reference signal is a channel state information reference signal CSI-RS, and the second reference signal is a sounding reference signal SRS.

16. A method for acquiring channel information, characterized in that: The method comprises: receiving a first reference signal from a network device at the first port group and the second port group; Send indication information to the network device, where the indication information is used to indicate first channel information and channel merging information obtained based on the first reference signal, where the first channel information is associated with the first port group, where the channel merging information is associated with the first port group and the second port group, where the channel merging information is used to merge second channel information with the first channel information, where the second channel information is associated with the second port group, and where the second channel information is obtained based on the second reference signal.

17. The method according to claim 16, characterized in that The first channel information is obtained by normalizing and quantizing third channel information based on reference channel information, the third channel information is obtained based on the first reference signal, and the third channel information is associated with the first port group.

18. The method according to claim 17, characterized in that The channel combination information is obtained based on fourth channel information and the reference channel information, where the fourth channel information is obtained by measuring the first reference signal on the first port in the second port group.

19. The method according to claim 18, characterized in that The first port is a port with the strongest signal strength in the second port group, or a port predefined by a protocol, or a port configured by the network device, or a port indicated by a terminal device.

20. The method according to claim 18 or 19, characterized in that The channel combination information includes amplitude information and phase information, and the amplitude information and the phase information are obtained based on the fourth channel information and the reference channel information.

21. The method according to any one of claims 16 to 20, characterized in that An energy intensity of the first reference signal on the first port group is lower than an energy intensity of the first reference signal on the second port group.

22. The method according to any one of claims 16 to 21, characterized in that The first reference signal is a channel state information reference signal CSI-RS, and the second reference signal is a sounding reference signal SRS.

23. A method for acquiring channel information, characterized in that: The method comprises: Sending a first reference signal to a first port group and a second port group of a terminal device; receiving indication information from the terminal device, the indication information being used to indicate first channel information and channel merging information obtained based on the first reference signal, the first channel information being associated with the first port group, the channel merging information being associated with the first port group and the second port group, the channel merging information being used to merge second channel information with the first channel information, the second channel information being associated with the second port group, and the second channel information being obtained based on a second reference signal; The second channel information and the first channel information are combined based on the channel combination information to obtain downlink channel information.

24. The method of claim 23, wherein: The first channel information is obtained by normalizing and quantizing third channel information based on reference channel information, the third channel information is obtained based on the first reference signal, and the third channel information is associated with the first port group.

25. The method of claim 24, wherein: The channel combination information is obtained based on fourth channel information and the reference channel information, where the fourth channel information is obtained by measuring the first reference signal on the first port in the second port group.

26. The method of claim 25, wherein: The first port is a port with the strongest signal strength in the second port group, or a port predefined by a protocol, or a port configured by a network device, or a port indicated by the terminal device.

27. The method according to claim 25 or 26, characterized in that The channel combination information includes amplitude information and phase information, and the amplitude information and the phase information are obtained based on the fourth channel information and the reference channel information.

28. The method according to any one of claims 25 to 27, characterized in that The combining the second channel information and the first channel information based on the channel combining information to obtain downlink channel information includes: Normalizing the second channel information based on the channel information corresponding to the first port in the second port group in the second channel information to obtain sixth channel information; Processing the sixth channel information based on the channel merging information to obtain seventh channel information; The first channel information and the seventh channel information are combined to obtain the downlink channel information.

29. The method according to any one of claims 23 to 28, characterized in that An energy intensity of the first reference signal on the first port group is lower than an energy intensity of the first reference signal on the second port group.

30. The method according to any one of claims 23 to 29, characterized in that The first reference signal is a channel state information reference signal CSI-RS, and the second reference signal is a sounding reference signal SRS.

31. A channel information acquisition device, characterized in that: Comprising a unit for implementing the method as claimed in any one of claims 1 to 7, or comprising a unit for implementing the method as claimed in any one of claims 8 to 15, or comprising a unit for implementing the method as claimed in any one of claims 16 to 22, or comprising a unit for implementing the method as claimed in any one of claims 23 to 30.

32. A communication system, characterized in that: The system comprises a first communication device and a second communication device, the first communication device being used to implement the method according to any one of claims 1 to 7, and the second communication device being used to implement the method according to any one of claims 8 to 15.

33. A communication system, characterized in that: The system comprises a first communication device and a second communication device, the first communication device being used to implement the method according to any one of claims 16 to 22, and the second communication device being used to implement the method according to any one of claims 23 to 30.

34. A communication device, characterized in that: It includes a processor and an interface circuit, wherein the interface circuit is used to receive signals from other communication devices outside the communication device and transmit them to the processor or send signals from the processor to other communication devices outside the communication device, and the processor is used to implement the method as described in any one of claims 1 to 7, or implement the method as described in any one of claims 8 to 15, implement the method as described in any one of claims 16 to 22, or implement the method as described in any one of claims 23 to 30 through a logic circuit or execution code instructions.

35. The communication device according to claim 34, characterized in that The communication device is a chip.

36. A chip module, characterized in that: It comprises a transceiver component and a chip, wherein the chip is used to execute the method as described in any one of claims 1 to 7, or the method as described in any one of claims 8 to 15, or the method as described in any one of claims 16 to 22, or the method as described in any one of claims 23 to 30.

37. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, it implements the method according to any one of claims 1 to 7, or implements the method according to any one of claims 8 to 15, or implements the method according to any one of claims 16 to 22, or implements the method according to any one of claims 23 to 30.

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