A method and device for determining a full-power transmission codebook subset

Abstract

The present application provides a method and device for determining a full-power transmission codebook subset, in which the terminal device reports to the network device the full-power transmission codebook subset corresponding to the frequency band supported by the terminal device before the transmission channel is switched. The network device or terminal device in the communication system can determine the full-power transmission codebook subset corresponding to the target frequency band after the transmission channel is switched based on the full-power transmission codebook subsets corresponding to multiple source frequency bands and the set rules. Among them, the multiple source frequency bands are the frequency bands where the multiple target antenna ports are located before the antenna port is switched, and the multiple target antenna ports are the antenna ports on the target frequency band after the antenna port is switched. Through this method, the network device or terminal device can determine the full-power transmission codebook subset of the terminal device after the transmission channel is switched.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to a Chinese patent application filed with the China Patent Office on February 24, 2021, with application number 202110209125.5 and application name “A terminal device capability indication method, terminal and network device”, the entire contents of which are incorporated by reference in this application. Technical Field

[0003] The present application relates to the field of communication technology, and in particular to a method and device for determining a full-power transmission codebook subset. Background Art

[0004] With the diversified development of mobile Internet, Internet of Things and other services, mobile communication systems have increasing requirements for uplink transmission of massive data. For example, services such as ultra-high-definition video, intelligent monitoring, and virtual reality (VR) video live broadcast have put forward higher requirements on uplink (UL) capacity.

[0005] In mobile communication systems, multi-transmission capability has gradually become an important configuration of the RF capability of terminal equipment. Terminal equipment with multi-transmission capability has multiple transmission channels, each of which contains an antenna port, so that the terminal equipment can transmit RF signals through multiple transmission channels respectively. The signal transmission efficiency of the terminal equipment is directly related to the transmission power of the transmission channel. However, since the terminal equipment usually needs to be in close contact with the human body, in order to avoid radiation hazards, the transmission power of the terminal equipment is strictly limited. In addition, the Sub-6G commercial frequency bands of the current mainstream fifth-generation (5th Generation, 5G) mobile communication system are mainly medium and high frequency bands such as 2.6GHz, 3.5GHz, and 4.9GHz, and generally adopt the time division duplex (TDD) system. However, the high frequency band will cause large signal propagation path loss, and the TDD system will cause the uplink duty cycle to be low in order to ensure the downlink capacity, resulting in limited uplink capacity. In summary, in order to increase the uplink capacity, the transmission power of the terminal equipment needs to be optimized to achieve more efficient resource utilization.

[0006] In the current transmission power optimization scheme of terminal devices, the terminal device reports a full-power transmission capability indication to the network device for each frequency band based on its own transmission capability, and the full-power transmission capability indication is used to indicate a full-power transmission codebook subset. When the network device schedules the terminal device to use any codeword in the full-power transmission codebook subset for uplink transmission, the terminal device can set the power contraction factor to 1 to achieve uplink full-power transmission.

[0007] In addition, in order to further improve the uplink capacity in the mobile communication system, the mobile communication system can adopt a terminal device transmission channel resource pooling solution, that is, allowing the terminal device's transmission channel to be flexibly switched to different frequency bands. This solution can enable uplink transmission of more streams in a single frequency band without adding additional RF links. In this way, network equipment can jointly optimize the correspondence between the transmission channel and the frequency band, as well as the power allocation between and within the frequency band according to the channel conditions and the maximum transmission power of each transmission channel, so as to maximize the uplink capacity.

[0008] At present, when the mobile communication system supports multiple frequency bands, the terminal device will report the full-power transmission codebook subset that can achieve full-power transmission for each frequency band. If considering supporting uplink full-power transmission capability indication in the transmission channel resource pooling solution, relying only on the existing reporting solution, the network equipment cannot determine the full-power transmission codebook subset of the terminal device after the transmission channel is switched, and therefore cannot perform accurate scheduling. Summary of the invention

[0009] The present application provides a method and device for determining a full-power transmission codebook subset, which are used to enable a network device to determine a full-power transmission codebook subset of a terminal device after a transmission channel is switched.

[0010] In a first aspect, an embodiment of the present application provides a method for determining a full-power transmission codebook subset, which can be applied to a network device or a terminal device in a mobile communication system. The following describes the steps included in the method with the communication device as the execution subject:

[0011] The communication device determines a full-power transmission codebook subset corresponding to a frequency band supported by the terminal device before the antenna port of the terminal device is switched; thereafter, the communication device may determine a full-power transmission codebook subset corresponding to a target frequency band after the antenna port of the terminal device is switched based on the full-power transmission codebook subsets corresponding to multiple source frequency bands and set rules;

[0012] Among them, the multiple source frequency bands are the frequency bands where the multiple target antenna ports are located before the antenna port is switched; the multiple target antenna ports are the antenna ports on the target frequency band after the antenna port is switched; the setting rules are used to indicate the correspondence between the full-power transmission codebook subsets corresponding to the multiple source frequency bands before the antenna port is switched and the full-power transmission codebook subsets corresponding to the target frequency band after the antenna port is switched.

[0013] Through this method, the full-power transmission codebook subset after the antenna port is switched follows the set rules, and both the network device and the terminal device follow the set rules to determine the full-power transmission codebook subset corresponding to the target frequency band after the sending channel is switched. Therefore, the terminal device does not need to additionally report the full-power transmission codebook subset after the antenna port is switched, and the signaling overhead of the full-power transmission capability indication will not be increased.

[0014] In one possible design, the method is applied to a network device, and the network device may determine a full-power transmission codebook subset corresponding to a frequency band supported by the terminal device before the antenna port of the terminal device is switched in the following manner:

[0015] A full-power transmission capability indication is received from the terminal device, where the full-power transmission capability indication is used to indicate a full-power transmission codebook subset corresponding to a frequency band supported by the terminal device before the antenna port of the terminal device is switched.

[0016] Through this design, the network device can determine the full-power transmission codebook subset corresponding to the frequency band supported by the terminal device before the antenna port of the terminal device is switched through the full-power transmission capability indication sent by the terminal device.

[0017] In one possible design, when the method is applied to the terminal device, the terminal device may also send a full-power transmission capability indication to the network device, and the full-power transmission capability indication is used to indicate a full-power transmission codebook subset corresponding to the frequency band supported by the terminal device before the antenna port of the terminal device is switched.

[0018] Through this design, the network device can determine the full-power transmission codebook subset corresponding to the frequency band supported by the terminal device before the antenna port of the terminal device is switched through the full-power transmission capability indication sent by the terminal device.

[0019] In one possible design, the setting rule is determined based on the coherence capability of the multiple target antenna ports on the target frequency band.

[0020] In one possible design, when the method is applied to a network device, the coherence capabilities of the multiple target antenna ports are determined in the following manner:

[0021] Receiving a first coherence capability indication from the terminal device, where the first coherence capability indication is used to indicate the coherence capability of the multiple target antenna ports; or

[0022] Receive a second coherence capability indication from the terminal device, where the second coherence capability indication is used to indicate the coherence capability of the antenna ports between the multiple source frequency bands before the antenna port of the terminal device is switched; determine the coherence capability of the multiple target antenna ports based on the coherence capability of the antenna ports on the multiple source frequency bands and the coherence capability of the antenna ports between the multiple source frequency bands.

[0023] Through this design, the network device can determine the coherence capabilities of multiple target antenna ports on the target frequency band to determine the setting rule.

[0024] In a possible design, the terminal device supports a first frequency band and a second frequency band, and there are two antenna ports on the first frequency band before the antenna port is switched, and there are two antenna ports on the second frequency band before the antenna port is switched; wherein at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; after the antenna port is switched, there are four antenna ports on the third frequency band;

[0025] In the above case, the setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table:

[0026]

[0027] Among them, the full-power transmission codebook subset corresponding to any frequency band is "00" indicating that the full-power transmission codebook subset is empty; G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" indicates all codewords in the uplink precoding codebook; "-" indicates non-existence.

[0028] In a possible design, the terminal device supports a first frequency band and a second frequency band, and there are two antenna ports on the first frequency band before the antenna port is switched, and there are two antenna ports on the second frequency band before the antenna port is switched; wherein at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; after the antenna port is switched, there are four antenna ports on the third frequency band;

[0029] In the above case, the setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table:

[0030]

[0031]

[0032] Among them, the full-power transmission codebook subset corresponding to any frequency band is "00", indicating that the full-power transmission codebook subset is empty; G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full-power transmission codebook subset is the union of the two TPMI groups before and after "+"; "-" means it does not exist.

[0033] In a possible design, the terminal device supports a first frequency band and a second frequency band, and there are two antenna ports on the first frequency band before the antenna port is switched, and there are two antenna ports on the second frequency band before the antenna port is switched; wherein at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; after the antenna port is switched, there are four antenna ports on the third frequency band;

[0034] In the above case, the setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table:

[0035]

[0036]

[0037] Among them, the full-power transmission codebook subset corresponding to any frequency band is "00", indicating that the full-power transmission codebook subset is empty; G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full-power transmission codebook subset is the union of the two TPMI groups before and after "+"; "-" means it does not exist.

[0038] In a possible design, the terminal device supports a first frequency band and a second frequency band, and there are two antenna ports on the first frequency band before the antenna port is switched, and there are two antenna ports on the second frequency band before the antenna port is switched; wherein at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; after the antenna port is switched, there are four antenna ports on the third frequency band;

[0039] In the above case, the setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table:

[0040]

[0041] Among them, the full-power transmission codebook subset corresponding to any frequency band is "00", indicating that the full-power transmission codebook subset is empty; G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full-power transmission codebook subset is the union of the two TPMI groups before and after "+"; "-" means it does not exist.

[0042] In a possible design, the terminal device supports a first frequency band and a second frequency band, and there are two antenna ports on the first frequency band before the antenna port is switched, and there are two antenna ports on the second frequency band before the antenna port is switched; wherein at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; after the antenna port is switched, there are four antenna ports on the third frequency band;

[0043] In the above case, the setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table:

[0044]

[0045] Among them, G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full power transmit codebook subset is the union of the two TPMI groups before and after "+";

[0046] Any codeword contained in the full power transmission codebook subset is an indication codeword; when the full-power transmission codebook subset corresponding to any frequency band contains the indication codeword, it indicates that the maximum transmission power of each antenna port on the frequency band is greater than or equal to a preset value; when the full-power transmission codebook subset corresponding to any frequency band does not contain the indication codeword, it indicates that there is at least one antenna port on the frequency band with a maximum transmission power less than the preset value.

[0047] In one possible design, the two antenna ports on the first frequency band are incoherent, the two antenna ports on the second frequency band are incoherent, and after the antenna ports of the terminal device are switched, the four antenna ports on the third frequency band are incoherent.

[0048] In one possible design, after the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of the four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is defaulted that after the antenna port of the terminal device is switched, the maximum transmit power of the first antenna port in the third frequency band is not less than the maximum transmit power of the third antenna port, the maximum transmit power of the third antenna port is not less than the maximum transmit power of the second antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

[0049] In a possible design, the terminal device supports a first frequency band and a second frequency band, and there are two antenna ports on the first frequency band before the antenna port is switched, and there are two antenna ports on the second frequency band before the antenna port is switched; wherein at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; after the antenna port is switched, there are four antenna ports on the third frequency band;

[0050] In the above case, the setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table:

[0051]

[0052] Among them, G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full power transmit codebook subset is the union of the two TPMI groups before and after "+";

[0053] Any codeword contained in the full power transmission codebook subset is an indication codeword; when the full-power transmission codebook subset corresponding to any frequency band contains the indication codeword, it indicates that the maximum transmission power of each antenna port on the frequency band is greater than or equal to a preset value; when the full-power transmission codebook subset corresponding to any frequency band does not contain the indication codeword, it indicates that there is at least one antenna port on the frequency band with a maximum transmission power less than the preset value.

[0054] In one possible design, two antenna ports on the first frequency band are coherent, two antenna ports on the second frequency band are coherent, and after the antenna ports of the terminal device are switched, the four antenna ports on the third frequency band are completely coherent.

[0055] In one possible design, after the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of the four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is defaulted that after the antenna port of the terminal device is switched, the maximum transmit power of the first antenna port in the third frequency band is not less than the maximum transmit power of the third antenna port, the maximum transmit power of the third antenna port is not less than the maximum transmit power of the second antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

[0056] In a possible design, the terminal device supports a first frequency band and a second frequency band, and there are two antenna ports on the first frequency band before the antenna port is switched, and there are two antenna ports on the second frequency band before the antenna port is switched; wherein at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; after the antenna port is switched, there are four antenna ports on the third frequency band;

[0057] In the above case, the setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table:

[0058]

[0059]

[0060] Among them, G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full power transmit codebook subset is the union of the two TPMI groups before and after "+";

[0061] Any codeword contained in the full power transmission codebook subset is an indication codeword; when the full-power transmission codebook subset corresponding to any frequency band contains the indication codeword, it indicates that the maximum transmission power of each antenna port on the frequency band is greater than or equal to a preset value; when the full-power transmission codebook subset corresponding to any frequency band does not contain the indication codeword, it indicates that there is at least one antenna port on the frequency band with a maximum transmission power less than the preset value.

[0062] In one possible design, two antenna ports are coherent on the first frequency band, two antenna ports are coherent on the second frequency band, and after the antenna ports of the terminal device are switched, the four antenna ports on the third frequency band are partially coherent.

[0063] In one possible design, after the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of the four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is assumed that after the antenna port of the terminal device is switched, the first antenna port and the third antenna port on the third frequency band are coherent, the second antenna port and the fourth antenna port are coherent, the maximum transmit power of the first antenna port is not less than the maximum transmit power of the third antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

[0064] In a possible design, the terminal device supports a first frequency band and a second frequency band, and there are two antenna ports on the first frequency band before the antenna port is switched, and there are two antenna ports on the second frequency band before the antenna port is switched; wherein at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; after the antenna port is switched, there are four antenna ports on the third frequency band;

[0065] In the above case, the setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table:

[0066]

[0067]

[0068] Among them, G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full power transmit codebook subset is the union of the two TPMI groups before and after "+";

[0069] Any codeword contained in the full power transmission codebook subset is an indication codeword; when the full-power transmission codebook subset corresponding to any frequency band contains the indication codeword, it indicates that the maximum transmission power of each antenna port on the frequency band is greater than or equal to a preset value; when the full-power transmission codebook subset corresponding to any frequency band does not contain the indication codeword, it indicates that there is at least one antenna port on the frequency band with a maximum transmission power less than the preset value.

[0070] In one possible design, two antenna ports on the first frequency band are coherent and two antenna ports on the second frequency band are incoherent, or two antenna ports on the first frequency band are incoherent and two antenna ports on the second frequency band are coherent; after the antenna ports of the terminal device are switched, only two of the four antenna ports on the third frequency band are coherent.

[0071] In one possible design, after the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of the four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is assumed that after the antenna port of the terminal device is switched, the first antenna port and the third antenna port on the third frequency band are coherent, the second antenna port and the fourth antenna port are incoherent, the maximum transmit power of the first antenna port is not less than the maximum transmit power of the third antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

[0072] In one possible design, when the method is applied to a network device, the network device may also determine the maximum transmit power of the multiple target antenna ports on the target frequency band in the following manner:

[0073] Method 1: determining the maximum transmit power of the multiple target antenna ports on the target frequency band according to the full-power transmit codebook subset corresponding to the target frequency band;

[0074] Method 2: receiving transmission power indication information from the terminal device, where the transmission power indication information is used to indicate the maximum transmission power of the multiple target antenna ports on the target frequency band after the antenna ports of the terminal device are switched.

[0075] Through this design, the network device can also determine the maximum transmission power of the terminal device at the multiple target antenna ports after the antenna port is switched.

[0076] In one possible design, when the multiple source frequency bands include a first frequency band and a second frequency band, the network device receives a full power transmission capability indication from the terminal device, including the following steps:

[0077] Receiving a first full-power transmission capability indication from the terminal device; and receiving a second full-power transmission capability indication from the terminal device; wherein the first full-power transmission capability indication includes first indication information and second indication information, and the second full-power transmission capability indication includes third indication information and fourth indication information; the first indication information is used to indicate a full-power transmission codebook subset corresponding to the first frequency band, and the second indication information is used to indicate a value distribution of the maximum transmission power of the antenna port on the first frequency band; the third indication information is used to indicate a full-power transmission codebook subset corresponding to the second frequency band, and the fourth indication information is used to indicate a value distribution of the maximum transmission power of the antenna port on the second frequency band;

[0078] In this case, the network device may also determine the maximum transmit power of the multiple target antenna ports after the antenna port of the terminal device is switched by the following steps:

[0079] Determine the maximum transmit power of the multiple target antenna ports on the target frequency band according to the full-power transmit codebook subset corresponding to the first frequency band indicated by the first indication information, the value distribution indicated by the second indication information, the full-power transmit codebook subset corresponding to the second frequency band indicated by the third indication information, and the value distribution indicated by the fourth indication information.

[0080] Through this design, the network device can also determine the maximum transmission power of the terminal device at the multiple target antenna ports after the antenna port is switched based on the full-power transmission subset corresponding to multiple source frequency bands and the distribution of the values ​​of the valve transmission power of the antenna port on each source frequency band.

[0081] In a second aspect, an embodiment of the present application provides a method for determining a full-power transmission codebook subset, which can be applied to a network device in a mobile communication system. The method comprises the following steps:

[0082] A network device receives a full-power transmission capability indication from a terminal device, wherein the full-power transmission capability indication is used to indicate a full-power transmission codebook subset corresponding to a target frequency band after the antenna port of the terminal device is switched; the network device determines, based on the full-power transmission capability indication, a full-power transmission codebook subset corresponding to the target frequency band after the antenna port of the terminal device is switched; wherein the target frequency band is a frequency band in which the corresponding antenna port changes before and after the antenna port of the terminal device is switched.

[0083] Through this method, the network device can determine the full-power transmission codebook subset corresponding to the target frequency band after the antenna port of the terminal device is switched through the full-power transmission capability indication reported by the terminal device.

[0084] In a third aspect, an embodiment of the present application provides a method for determining a full-power transmission codebook subset, which can be applied to a terminal device in a mobile communication system. The method comprises the following steps:

[0085] The terminal device determines a full-power transmission codebook subset corresponding to a target frequency band after the antenna port is switched; the terminal device sends a full-power transmission capability indication to a network device, and the full-power transmission capability indication is used to indicate the full-power transmission codebook subset corresponding to the target frequency band after the antenna port of the terminal device is switched; wherein the target frequency band is a frequency band whose corresponding antenna port changes before and after the antenna port of the terminal device is switched.

[0086] Through this method, the network device can determine the full-power transmission codebook subset corresponding to the target frequency band after the antenna port of the terminal device is switched through the full-power transmission capability indication reported by the terminal device.

[0087] In a fourth aspect, an embodiment of the present application provides a method for determining the maximum transmit power of an antenna port (ie, a transmit channel), which is applied to a network device in a mobile communication system. The method comprises the following steps:

[0088] A network device receives a full-power transmission capability indication from a terminal device, the full-power transmission capability indication including first indication information and second indication information, the first indication information being used to indicate a full-power transmission codebook subset corresponding to a first frequency band, and the second indication information being used to indicate a value distribution of the maximum transmission power of the antenna port on the first frequency band; the network device determines the maximum transmission power of the antenna port on the first frequency band based on the full-power transmission codebook subset and the value distribution.

[0089] Through this method, the network device can directly determine the full-power transmission codebook subset corresponding to the first frequency band and the value distribution of the maximum transmission power of the antenna port on the first frequency band according to the full-power transmission capability indication sent by the terminal device, thereby determining the maximum transmission power of each antenna port of the terminal device on the first frequency band according to the two pieces of information. Since this method does not require the terminal device to send additional transmission power indication information, it will not cause more signaling overhead for the mobile communication system.

[0090] In one possible design, the second indication information is used to indicate that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to a first preset value; or

[0091] When the value of the second indication information is the first value, the second indication information indicates that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to the first preset value; when the value of the second indication information is the second value, the second indication information indicates that the maximum transmit power of at least one antenna port on the first frequency band is less than the first preset value;

[0092] The first preset value is smaller than the maximum total transmit power P of the terminal device allowed by the first frequency band.

[0093] In one possible design, the terminal device has two antenna ports on the first frequency band;

[0094] When the full power transmission codebook subset indicated by the first indication information is When the second indication information indicates that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to the first preset value, the maximum transmit powers of the two antenna ports on the first frequency band are P and P respectively; or

[0095] When the full power transmission codebook subset indicated by the first indication information is or When the second indication information indicates that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to the first preset value, the maximum transmit powers of the two antenna ports on the first frequency band are P and the first preset value respectively; or

[0096] When the full power transmission codebook subset indicated by the first indication information is or When the second indication information indicates that the maximum transmit power of at least one antenna port on the first frequency band is less than the first preset value, the maximum transmit powers of the two antenna ports on the first frequency band are P and the second preset value, respectively; wherein the second preset value is less than the first preset value; or

[0097] When the full-power transmission codebook subset indicated by the first indication information is empty, and the second indication information indicates that the maximum transmission power of all antenna ports on the first frequency band is greater than or equal to the first preset value, the maximum transmission power of the two antenna ports on the first frequency band are the first preset value and the first preset value, respectively.

[0098] In one possible design, when the second indication information indicates that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to the first preset value, the second indication information is used to indicate the indication codeword

[0099] In one possible design, after determining the maximum transmit power of the antenna port on the first frequency band, the network device may also determine the maximum transmit power of the target antenna port on the other frequency band after the antenna port of the terminal device is switched in the following manner:

[0100] Method 1: receiving a switching adjustment value of a target antenna port from the terminal device; wherein the target antenna port is an antenna port that can be switched to other frequency bands on the first frequency band, and the switching adjustment value is an adjustment value of the maximum transmit power after the target antenna port is switched to the other frequency band; determining the maximum transmit power of the target antenna port on the other frequency band after the antenna port of the terminal device is switched based on the maximum transmit power of the target antenna port on the target frequency band and the switching adjustment value of the target antenna port; or

[0101] Method 2: receiving transmission power indication information from the terminal device, where the transmission power indication information is used to indicate the maximum transmission power of the antenna port of the terminal device in the second frequency band after the antenna port is switched.

[0102] In a fifth aspect, an embodiment of the present application provides a method for determining the maximum transmit power of an antenna port (ie, a transmit channel), which is applied to a terminal device in a mobile communication system. The method comprises the following steps:

[0103] The terminal device determines a full-power transmission codebook set corresponding to a first frequency band, and a maximum transmission power of an antenna port on the first frequency band; the terminal device sends a full-power transmission capability indication to a network device, and the full-power transmission capability indication includes first indication information and second indication information, the first indication information is used to indicate a full-power transmission codebook subset corresponding to the first frequency band, and the second indication information is used to indicate the value distribution of the maximum transmission power of the antenna port on the first frequency band.

[0104] Through this method, the network device can directly determine the full-power transmission codebook subset corresponding to the first frequency band and the value distribution of the maximum transmission power of the antenna port on the first frequency band according to the full-power transmission capability indication sent by the terminal device, thereby determining the maximum transmission power of each antenna port of the terminal device on the first frequency band according to the two pieces of information. Since this method does not require the terminal device to send additional transmission power indication information, it will not cause more signaling overhead for the mobile communication system.

[0105] In one possible design, the second indication information is used to indicate that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to a first preset value; or

[0106] When the value of the second indication information is the first value, the second indication information indicates that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to the first preset value; when the value of the second indication information is the second value, the second indication information indicates that the maximum transmit power of at least one antenna port on the first frequency band is less than the first preset value;

[0107] The first preset value is smaller than the maximum total transmit power P of the terminal device allowed by the first frequency band.

[0108] In one possible design, the terminal device has two antenna ports on the first frequency band;

[0109] When the full power transmission codebook subset indicated by the first indication information is When the maximum transmit powers of the two antenna ports on the first frequency band are P and P respectively, the second indication information indicates that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to the first preset value; or

[0110] When the full power transmission codebook subset indicated by the first indication information is or and when the maximum transmit powers of the two antenna ports on the first frequency band are P and the first preset value respectively, the second indication information indicates that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to the first preset value; or

[0111] When the full power transmission codebook subset indicated by the first indication information is or When the maximum transmit powers of the two antenna ports on the first frequency band are P and the second preset value respectively, the second indication information indicates that the maximum transmit power of at least one antenna port on the first frequency band is less than the first preset value; wherein the second preset value is less than the first preset value; or

[0112] When the full-power transmission codebook subset indicated by the first indication information is empty, and the maximum transmission powers of the two antenna ports on the first frequency band are respectively the first preset value and the first preset value, the second indication information indicates that the maximum transmission power of all antenna ports on the first frequency band is greater than or equal to the first preset value.

[0113] In one possible design, when the second indication information indicates that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to the first preset value, the second indication information is used to indicate the indication codeword

[0114] In one possible design, the terminal device determines a switching adjustment value of a target antenna port; wherein the target antenna port is an antenna port that can be switched to other frequency bands on the target frequency band; the switching adjustment value is an adjustment value of the maximum transmit power after the target antenna port is switched to the other frequency band; the terminal device sends the switching adjustment value of the target antenna port to the network device; or

[0115] The terminal device sends transmission power indication information to the network device, where the transmission power indication information is used to indicate the maximum transmission power of the antenna port of the terminal device in the second frequency band after the antenna port is switched.

[0116] Through this design, the network device can determine the maximum transmission power of the target antenna port in the other frequency band after the antenna port of the terminal device is switched based on the switching adjustment value and transmission power indication information of the target antenna port reported by the terminal device.

[0117] In a sixth aspect, an embodiment of the present application provides a method for determining the maximum transmit power of an antenna port (ie, a transmit channel), which is applied to a network device in a mobile communication system. The method comprises the following steps:

[0118] The network device receives transmission power indication information from the terminal device, where the transmission power indication information is used to indicate the maximum transmission power of the antenna port on the first frequency band supported by the terminal device; the network device determines the maximum transmission power of the antenna port of the terminal device on the first frequency band based on the transmission power indication information.

[0119] Through this method, the network device can directly determine the maximum transmission power of the antenna port of the terminal device in the first frequency band according to the transmission power indication information transmitted by the terminal device.

[0120] In a seventh aspect, an embodiment of the present application provides a method for determining the maximum transmit power of an antenna port (ie, a transmit channel), which is applied to a network device in a mobile communication system. The method comprises the following steps:

[0121] The maximum transmission power of the antenna port of the terminal device on the first frequency band supported; the terminal device sends transmission power indication information to the network device, and the transmission power indication information is used to indicate the maximum transmission power of the antenna port on the first frequency band.

[0122] Through this method, the network device can directly determine the maximum transmission power of the antenna port of the terminal device in the first frequency band according to the transmission power indication information transmitted by the terminal device.

[0123] In an eighth aspect, an embodiment of the present application provides a communication device, comprising a unit for executing each step in any of the above aspects.

[0124] In a ninth aspect, an embodiment of the present application provides a communication device, comprising at least one processing element and at least one storage element, wherein the at least one storage element is used to store programs and data, and the at least one processing element is used to execute the method provided in any of the above aspects of the present application.

[0125] In the tenth aspect, an embodiment of the present application also provides a communication system, including a terminal device for executing the method provided in the first aspect of the present application and a network device for executing the method provided in the first aspect of the present application.

[0126] In the eleventh aspect, an embodiment of the present application also provides a communication system, including a network device for executing the method provided in the second aspect of the present application, and a terminal device for executing the method provided in the third aspect of the present application.

[0127] In the twelfth aspect, an embodiment of the present application also provides a communication system, including a network device for executing the method provided in the fourth aspect of the present application, and a terminal device for executing the method provided in the fifth aspect of the present application.

[0128] In the thirteenth aspect, an embodiment of the present application also provides a communication system, including a network device for executing the method provided in the sixth aspect of the present application, and a terminal device for executing the method provided in the seventh aspect of the present application.

[0129] In a fourteenth aspect, an embodiment of the present application further provides a computer program, which, when executed on a computer, enables the computer to execute the method provided in any of the above aspects.

[0130] In a fifteenth aspect, an embodiment of the present application further provides a computer storage medium, in which a computer program is stored. When the computer program is executed by a computer, the computer executes the method provided in any one of the above aspects.

[0131] In the sixteenth aspect, an embodiment of the present application further provides a chip, which is used to read a computer program stored in a memory and execute the method provided in any of the above aspects.

[0132] In the seventeenth aspect, the embodiment of the present application further provides a chip system, which includes a processor for supporting a computer device to implement the method provided in any of the above aspects. In one possible design, the chip system also includes a memory, which is used to store the necessary programs and data of the computer device. The chip system can be composed of a chip, or it can include a chip and other discrete devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0133] Figure 1A An architecture diagram of a mobile communication system provided in an embodiment of the present application;

[0134] Figure 1B A schematic diagram of the structure of a wireless transmission system of a terminal device provided in an embodiment of the present application;

[0135] Figure 2 A flow chart of a method for determining the maximum transmit power of a transmit channel provided in an embodiment of the present application;

[0136] Figure 3 A flow chart of another method for determining the maximum transmission power of a transmission channel used in an embodiment of the present application;

[0137] Figure 4 A logic diagram of transmission channel switching of a terminal device provided in an embodiment of the present application;

[0138] Figure 5 A flow chart of a method for determining a full-power transmission codebook subset provided in an embodiment of the present application;

[0139] Figure 6 A flow chart of another method for determining a full-power transmission codebook subset provided in an embodiment of the present application;

[0140] Figure 7 A structural diagram of a communication device provided in an embodiment of the present application;

[0141] Figure 8 A structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0142] The present application provides a method and device for determining a full-power transmission codebook subset, which is used to enable a network device to determine a full-power transmission codebook subset of a terminal device after a transmission channel is switched. The method and the device are based on the same technical concept. Since the method and the device solve the problem in a similar manner, the implementation of the device and the method can refer to each other, and the repeated parts will not be repeated.

[0143] Below, some terms in this application are explained to facilitate understanding by those skilled in the art.

[0144] 1) Network equipment is a device in a communication system that connects a terminal device to a wireless network. The network equipment, as a node in a wireless access network, can be a base station, a radio access network (RAN) node (or device), or an access point (AP).

[0145] At present, some examples of network equipment are: gNB, transmission reception point (TRP), evolved Node B (eNB), radio network controller (RNC), Node B (NB), access point (AP), base station controller (BSC), base transceiver station (BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), or base band unit (BBU), Enterprise LTE Discrete Spectrum Aggregation (eLTE-DSA) base station, etc.

[0146] In addition, in a network structure, the network device may include a centralized unit (CU) node and a distributed unit (DU) node. This structure splits the protocol layer of the eNB in ​​the long term evolution (LTE) system, places the functions of some protocol layers in the CU for centralized control, and distributes the functions of the remaining part or all of the protocol layers in the DU, which is centrally controlled by the CU.

[0147] 2) Terminal equipment is a device that provides voice and / or data connectivity to users. Terminal equipment can also be called user equipment (UE), mobile station (MS), mobile terminal (MT), etc.

[0148] For example, the terminal device may be a handheld device with wireless connection function, various vehicle-mounted devices, a roadside unit, etc. At present, some examples of terminal devices are: mobile phones, tablet computers, laptops, PDAs, mobile internet devices (MID), smart point of sale (POS), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, various smart meters (smart water meters, smart electricity meters, smart gas meters), eLTE-DSA UE, devices with integrated access and backhaul (IAB) capabilities, on-board electronic control units (ECU), on-board computers, on-board cruise systems, telematics boxes (T-BOX), etc.

[0149] 3) The transmission channel of the terminal device is used for the terminal device to transmit radio frequency signals. In the embodiment of the present application, it can be represented by Tx (transmission). In the embodiment of the present application, the terminal device with multi-transmission capability has multiple transmission channels. Each transmission channel corresponds to an antenna port.

[0150] Note that antenna ports refer to logical ports used for transmission. They do not have a one-to-one correspondence with physical antennas and are virtualized representations of physical antennas. For example, physically, multiple transmission channels can share one or more physical antennas; however, logically, each transmission channel corresponds to a different antenna port.

[0151] Exemplarily, from a hardware structure perspective, each transmission channel includes a physical antenna and at least one of the following components: a power amplifier (PA), a bandpass filter, a signal amplifier, a mixer, a digital to analog converter (DAC), and a digital front end (DFE).

[0152] In some possible embodiments, different transmit channels may share one or more of a power amplifier (PA), a bandpass filter, a signal amplifier, a mixer, a digital to analog converter (DAC), a digital front end (DFE), and a physical antenna.

[0153] In some possible embodiments, each transmit channel has one or more of an independent PA, a bandpass filter, a signal amplifier, a mixer, a DAC, a DFE, and a physical antenna.

[0154] It should also be noted that when the terminal device supports multiple frequency bands, the transmission channels of the terminal device can operate in different frequency bands, for example, Tx0 and Tx1 operate in frequency band 1, while Tx2 and Tx3 operate in frequency band 2. In various embodiments of the present application, for the convenience of description, "a transmission channel operating in a certain frequency band" can be expressed as "a transmission channel corresponding to a certain frequency band".

[0155] 4) The transmit power of the transmit channel is the actual transmit power of the transmit channel when transmitting a signal, which is determined by the operating parameters of each device in the transmit channel (for example, the output power of the PA). In some scenarios, the transmit power of the transmit channel is equal to the output power of the transmit channel PA, so the two can be interchangeable in these scenarios.

[0156] Generally, when a terminal device transmits a service signal, the transmission power of multiple transmission channels of the terminal device is the same. Among them, the service signal is a signal that carries specific data such as user plane data, signaling, and messages.

[0157] 5) The maximum transmit power of the transmission channel is determined by the transmission capability of the transmission channel and the maximum total transmit power of the terminal device, which is the maximum transmit power threshold allowed by the transmission channel. That is, when the terminal device uses the transmission channel to transmit a signal, the transmit power of the transmission channel is less than or equal to the maximum transmit power of the transmission channel.

[0158] 6) The total transmit power of the terminal device is the transmit power allowed by the terminal device when transmitting a signal, that is, the maximum threshold of the sum of the transmit powers of all transmit channels of the terminal device at any time when the terminal device transmits a signal. In other words, the sum of the transmit powers of all transmit channels of the terminal device at any time when the terminal device transmits a signal is less than or equal to the total transmit power of the terminal device.

[0159] Generally, in order to improve uplink capacity, the sum of the transmission powers of all transmission channels of a terminal device at any time when transmitting a signal is equal to the total transmission power of the terminal device.

[0160] 7) The maximum total transmit power of the terminal device is determined by the transmit capability of the terminal device (i.e., the transmit capability of all transmit channels of the terminal device) and the power class (PC) of the terminal device. For example, when the power class of the terminal device is PC3, the maximum total transmit power of the terminal device is 23dBm.

[0161] Through the introduction of the terms in 4)-7) above, the following relationships can be known:

[0162] The maximum total transmit power of the terminal device ≥ the total transmit power of the terminal device ≥ the sum of the transmit powers of all transmit channels of the terminal device ≥ the transmit power of any transmit channel of the terminal device;

[0163] The maximum total transmit power of the terminal device ≥ the maximum transmit power of any transmit channel of the terminal device ≥ the transmit power of the transmit channel of the terminal device.

[0164] 8) Full power transmission of the terminal device means that the total transmission power of the terminal device reaches the maximum total transmission power of the terminal device, which can also be called the uplink full power transmission of the terminal device.

[0165] In addition, when a certain transmission channel of the terminal device can achieve full-power transmission, it means that the maximum transmission power of the transmission channel = the maximum total transmission power of the terminal device.

[0166] 9) The power shrinkage factor is the ratio of the actual total transmit power of the non-zero power antenna port of the terminal device to the channel transmit power. The channel transmit power can be determined based on path loss parameters, parameters configured by the network device, etc. The maximum value of the channel transmit power is the maximum total transmit power of the terminal device.

[0167] 10) Frequency band: A continuous frequency domain resource, also known as a frequency domain unit. In the field of communications, a frequency band used for carrier modulation is a carrier. A mobile communication system can support one frequency band or multiple frequency bands.

[0168] In addition, when the mobile communication system supports multiple frequency bands, the radio frequency capabilities of the terminal device in different frequency bands may be different, that is, the maximum transmit power of the same transmit channel of the terminal device and the maximum total transmit power of the terminal device in different frequency bands may be different. Accordingly, the full power transmit codebook subsets of the terminal device in different frequency bands may be different.

[0169] 11), codebook, codebook subset, codeword, precoding matrix.

[0170] The codebook is a set of V matrices that meet the transmission conditions and are defined to achieve channel precoding. In the case where the number of transmission channels of terminal devices in the communication system is different and the coherence capability of the transmission channels is different, the codebooks applicable to the communication system are also different.

[0171] The codeword is equivalent to the precoding matrix, both of which are V matrices in the codebook.

[0172] The codebook subset includes some codewords in the codebook.

[0173] The full-power transmission codebook subset is a codebook subset that the terminal device determines in the codebook based on its own radio frequency capability to achieve full-power transmission. When the network device schedules the terminal device to use any codeword in the full-power transmission codebook subset for uplink transmission, the terminal device can set the power contraction factor to 1 to achieve full-power transmission.

[0174] 12) "And / or" describes the relationship between the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0175] It should be noted that the term "plurality" in this application refers to two or more than two, and "at least one" refers to one or more.

[0176] In addition, it should be understood that, in the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing the description, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying an order.

[0177] It can be seen from the above description of the transmission channel of the terminal device that the transmission channel of the terminal device corresponds one-to-one to the antenna port. In some cases in the field of communications, "antenna port" may refer to "transmission channel", and the two may be equivalent and interchangeable. Therefore, the "transmission power of the transmission channel" and "maximum transmission power of the transmission channel" recorded in the embodiments of the present application may be equivalent to "transmission power of the antenna port" and "maximum transmission power of the antenna port"; "transmission channel switching" is equivalent to "antenna port switching"; "coherence capability of the transmission channel" may be equivalent to "coherence capability of the antenna port"; "X antenna ports" may be equivalent to "X transmission channels"; "transmission channel corresponding to the frequency band" may be equivalent to "antenna port corresponding to the frequency band".

[0178] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0179] Figure 1A The structure of the mobile communication system to which the method provided in the embodiment of the present application is applicable is shown. Figure 1A As shown, the system includes: network equipment and terminal equipment (such as Figure 1A Terminal device a and terminal device b) shown in FIG.

[0180] The network device is an entity on the network side that can receive and transmit wireless signals. It is responsible for providing wireless access-related services to terminal devices within its coverage area, realizing physical layer functions, resource scheduling and wireless resource management, Quality of Service (QoS) management, wireless access control and mobility management functions.

[0181] The terminal device is an entity on the user side that can receive and transmit wireless signals and needs to access the network through the network device. The terminal device can be a variety of devices that provide voice and / or data connectivity for users, such as Figure 1A As shown, the terminal device may be a vehicle-mounted device, a smart phone, etc.

[0182] The terminal device has a multi-transmitting capability, that is, it can transmit signals through multiple transmitting channels. Of course, the terminal device may also have a multi-receiving capability, that is, it can receive signals through multiple receiving channels.

[0183] In addition, the network device may also have multiple transmission capability and / or multiple reception capability. When the terminal device and the network device have multiple transmission capability and multiple reception capability, the system may also be referred to as a multiple-input multiple-output (MIMO) system.

[0184] In addition, the terminal device may establish a connection with one network device to form a single-connection communication system; or may establish a connection with two network devices to form a dual-connectivity (DC) communication system.

[0185] It should also be pointed out that if Figure 1A The mobile communication system shown is used as an example, and does not limit the communication system to which the method provided in the embodiment of the present application is applicable. In short, the method provided in the embodiment of the present application is applicable to communication systems and application scenarios in which various terminal devices support multi-transmission capabilities, that is, the embodiment of the present application can also be applied to communication systems of various types and standards, such as: The 5th Generation (5G) communication system, Long Term Evolution (LTE) communication system, Wi-Fi system, vehicle to everything (V2X), Long Term Evolution-Vehicle Network (LTE-vehicle, LTE-V), vehicle to vehicle (V2V), vehicle network, machine type communication (MTC), Internet of Things (IoT), Long Term Evolution-Machine to Machine (LTE-machine to machine, LTE-M), machine to machine (machine to machine, M2M), the embodiment of the present application is not limited.

[0186] Figure 1B The structure block diagram of a wireless transmission system in a terminal device provided by an embodiment of the present application is shown. Figure 1B As shown, the wireless transmission system may include: a processor, a power amplifier (PA), a bandpass filter, a coupler and a physical antenna.

[0187] The processor may include one or more processing units, for example, the processor may include an application processor (AP), a modem processor, a graphics processor (GPU), an image signal processor (ISP), a neural-network processing unit (NPU), a controller, a video codec, a digital signal processor (DSP), a controller, etc. Among them, the controller may generate an operation control signal according to the instruction opcode and the timing signal to complete the control of fetching and executing instructions.

[0188] A memory may also be provided in the processor for storing instructions and data. In some embodiments, the memory in the processor is a cache memory. The memory may store instructions or data that the processor has just used or circulated. If the processor needs to use the instruction or data again, it may be directly called from the memory. By providing the memory, the processor may be prevented from repeating access operations, reducing the waiting time of the processor, thereby improving the efficiency of the system. In some embodiments, the memory may also be provided outside the processor and coupled to the processor.

[0189] In addition, in this embodiment, the processor may include a baseband (BB) and / or a radio frequency integrated circuit (RFIC).

[0190] Baseband refers to the baseband signal to be transmitted and / or the baseband signal to be decoded. Specifically, when the terminal device transmits the signal, the baseband encodes the voice or other data signal into the baseband signal (baseband code) to be transmitted; when the terminal device receives the signal, the baseband decodes the received baseband signal (baseband code) into voice or other data signal. The baseband may include components such as encoder, decoder and baseband processor. The encoder is used to synthesize the baseband signal to be transmitted, and the decoder is used to decode the received baseband signal. The baseband processor can be a microprocessor (MCU), and the baseband processor can be used to control the encoder and decoder. For example, the baseband processor can be used to complete the scheduling of encoding and decoding, the communication between the encoder and the decoder, and the peripheral driver (the enable signal can be sent to the components outside the baseband to enable the components outside the baseband), etc.

[0191] The RF integrated circuit is used to process the baseband signal to form an RF signal, and pass the RF signal to the power amplifier for amplification. In addition, the RF integrated circuit can also be used to process the received RF signal to form a baseband signal, and send the formed baseband signal to the baseband for decoding. Among them, the RF signal is a modulated radio wave signal with a certain transmission frequency. Exemplarily, as shown in the figure, the RF integrated circuit may include the following devices: DFE, DAC, low-pass filter, mixer, signal amplifier, etc. In addition, each RF integrated circuit may also include an oscillator; or multiple RF integrated circuits can share the same oscillator and receive the local oscillator signal of the same oscillator.

[0192] The processor may modulate the signal according to a mobile communication technology or a wireless communication technology. Mobile communication technologies may include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), wideband code division multiple access (WCDMA), time-division code division multiple access (TD-SCDMA), long term evolution (LTE), emerging wireless communication technologies (also known as fifth generation mobile communication technologies, English: 5th generation mobile networks or 5th generation wireless systems, 5th-Generation, 5th-Generation New Radio, referred to as 5G, 5G technology or 5G NR), etc. Wireless communication technologies may include wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), nearfield communication (NFC), infrared technology (IR), etc.

[0193] The processor may include at least one baseband and at least one radio frequency integrated circuit. In some embodiments, each baseband corresponds to an radio frequency integrated circuit to frequency modulate the signal according to one or more communication technologies. For example, the first baseband and the first radio frequency integrated circuit frequency modulate the signal according to 5G technology, the second baseband and the second radio frequency integrated circuit frequency modulate the signal according to 4G technology, the third baseband and the third radio frequency integrated circuit frequency modulate the signal according to Wi-Fi technology, the fourth baseband and the fourth radio frequency integrated circuit frequency modulate the signal according to Bluetooth technology, and so on. For another example, the first baseband and the first radio frequency integrated circuit can simultaneously modulate the signal according to 4G technology and 5G technology, the second baseband and the second radio frequency integrated circuit frequency modulate the signal according to Wi-Fi technology, and so on. In some embodiments, one baseband can also correspond to multiple radio frequency integrated circuits to improve the integration, such as Figure 1B as shown in .

[0194] In some embodiments, the baseband and the RFIC may be integrated with other components in the processor in one integrated circuit. In some embodiments, the baseband and the RFIC may be independent devices of the processor. In some embodiments, a baseband and at least one RFIC corresponding to it may be integrated into a device independent of the processor 100. In some embodiments, the baseband and the RFIC are integrated in different integrated circuits, and the baseband and the RFIC are packaged together, for example, in a system on a chip (SOC).

[0195] In a processor, different processing units may be independent devices or integrated into one or more integrated circuits.

[0196] The physical antenna is used to transmit and receive electromagnetic wave signals (radio frequency signals), such as antenna 1, ... antenna n in the figure. The terminal device may include multiple physical antennas, each of which can be used to cover a single or multiple communication frequency bands. The multiple physical antennas may be one or more of a multi-frequency antenna, an array antenna, or an on-chip antenna.

[0197] The processor is coupled to the physical antenna to implement various functions associated with transmitting and receiving radio frequency signals. For example, when the terminal device is transmitting a signal, the baseband synthesizes the data to be transmitted (digital signal) into the baseband signal to be transmitted, and the baseband signal is converted into a radio frequency signal by the radio frequency integrated circuit. The radio frequency signal is amplified by the power amplifier, filtered by the bandpass filter, and processed by the coupler before being finally transmitted through the physical antenna.

[0198] like Figure 1BAs shown, a baseband signal generated by the baseband is processed by the RF integrated circuit, amplified by the power amplifier, filtered by the bandpass filter, and processed by the coupler to generate the RF signal that needs to be transmitted. The path transmitted through the antenna can be called a transmission channel. Since in the embodiment of the present application, the terminal device has a multi-transmission capability, as shown in the figure, the terminal device has multiple transmission channels (Tx1 to Txn), such as 2 transmission channels, 4 transmission channels, 8 transmission channels, etc. Exemplarily, when the terminal device has dual-transmission capability, the wireless transmission system includes two transmission channels.

[0199] Optionally, as shown in the figure, the power amplifiers in different transmission channels can be powered by one power supply. Of course, the power amplifiers in different transmission channels can also be powered by different power supplies.

[0200] It should also be noted that in the above wireless transmission system, the baseband can manage and adjust the operating parameters of itself and other devices in the system. Specifically, the baseband can have multiple pins for connecting to corresponding pins of other devices respectively, so as to send control signals to these devices and adjust their operating parameters.

[0201] For example, the baseband can adjust its own operating parameters to adjust the transmission power of the baseband signal it generates, and then adjust the transmission power of each transmission channel. For another example, the baseband can adjust the operating parameters of the DFE, signal amplifier, etc. in the RF integrated circuit in any transmission channel to increase the transmission power of the transmission channel. For another example, the baseband can adjust the operating parameters of any transmission channel PA, or adjust the voltage of the power supply that provides power to the transmission channel PA to adjust the output power of the transmission channel PA, and then adjust the transmission power of the transmission channel. That is, the baseband can have pins connected to the DFE, signal amplifier, power amplifier, and power supply in each transmission channel; accordingly, the DFE, signal amplifier, power amplifier, and power supply in each transmission channel also have pins connected to the baseband.

[0202] It should be noted that Figure 1B As a structural example of a wireless transmission system of a terminal device, it does not constitute any limitation. In other embodiments of the present application, the terminal device may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently. In addition, the components shown in the figure can be implemented in hardware, software, or a combination of software and hardware.

[0203] In such Figure 1AIn the mobile communication system shown, the network device can schedule the codewords for uplink transmission to the terminal device in a codebook-based manner. For different numbers of antenna ports, different numbers of transmission layers, and different waveforms, the network device and the terminal device pre-store multiple codebooks, as shown in Tables 1 to 7 below. Each table represents a codebook, and W in each table represents a codeword (precoding matrix). Among them, each row of the precoding matrix corresponds to an antenna port, and each column corresponds to a transmission layer; that is, the number of rows of the precoding matrix is ​​equal to the number of antenna ports of the terminal device, and the number of columns of the precoding matrix is ​​equal to the number of transmission layers of the uplink transmission. In addition, in each codebook, a transmitted precoding matrix indicator (TPMI) index corresponds to a precoding matrix, and the precoding matrices in each table are arranged from left to right in the order of increasing TPMI indexes. The "-" in the table indicates that the precoding matrix is ​​empty and does not exist. The transmission layer is also called the data layer, data stream, spatial stream, etc.

[0204] It should be noted that the values ​​of elements in different rows in the same column of the precoding matrix indicate the phase difference between different antenna ports. When the value of an element in a row or column of the precoding matrix is ​​0, it means that the antenna port corresponding to the row is not used to transmit the transmission layer, that is, the transmission power of the transmission channel where the antenna port is located on the transmission layer is 0.

[0205] Table 1

[0206]

[0207] Table 1 is a codebook for uplink transmission of 2 antenna ports and 1 transmission layer. TPMI index values ​​0 to 1 correspond to non-coherent codewords (precoding matrices), and TPMI index values ​​2 to 5 correspond to fully coherent codewords (precoding matrices).

[0208] Table 2

[0209]

[0210] Table 2 is a codebook for uplink transmission of 2 antenna ports and 2 transmission layers. TPMI index value 0 corresponds to a non-coherent type codeword (precoding matrix), and TPMI index values ​​1 to 2 correspond to a fully coherent type codeword (precoding matrix).

[0211] Table 3

[0212]

[0213]

[0214] Table 3 shows the codebook for uplink transmission of 4 antenna ports and 1 transmission layer, and adopts discrete Fourier transformation-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) waveform. TPMI index values ​​0 to 3 correspond to non-coherent codewords (precoding matrices), TPMI index values ​​4 to 11 correspond to partially coherent codewords (precoding matrices), and TPMI index values ​​12 to 27 correspond to fully coherent codewords (precoding matrices).

[0215] Table 4

[0216]

[0217] Table 4 shows the codebook for uplink transmission of 4 antenna ports and 1 transmission layer, and adopts cyclic prefix-orthogonal frequency division multiplexing (CP-OFDM) waveform. TPMI index values ​​0 to 3 correspond to non-coherent codewords (precoding matrices), TPMI index values ​​4 to 11 correspond to partially coherent codewords (precoding matrices), and TPMI index values ​​12 to 27 correspond to fully coherent codewords (precoding matrices).

[0218] Table 5

[0219]

[0220] Table 5 shows the codebook for uplink transmission of 4 antenna ports and 2 transmission layers, and uses CP-OFDM waveform. TPMI index values ​​0 to 5 correspond to non-coherent codewords (precoding matrices), TPMI index values ​​6 to 13 correspond to partially coherent codewords (precoding matrices), and TPMI index values ​​14 to 21 correspond to fully coherent codewords (precoding matrices).

[0221] Table 6

[0222]

[0223] Table 6 shows the uplink transmission of 4 antenna ports and 3 transmission layers, and the codebook using the CP-OFDM waveform. TPMI index value 0 corresponds to the non-coherent type codeword (precoding matrix), TPMI index values ​​1 to 2 correspond to the partially coherent type codeword (precoding matrix), and TPMI index values ​​3 to 6 correspond to the fully coherent type codeword (precoding matrix).

[0224] Table 7

[0225]

[0226] Table 7 shows the codebook for uplink transmission of 4 antenna ports and 4 transmission layers using CP-OFDM waveform. TPMI index value 0 corresponds to non-coherent codewords (precoding matrix), TPMI index values ​​1 to 2 correspond to partially coherent codewords (precoding matrix), and TPMI index values ​​3 to 4 correspond to fully coherent codewords (precoding matrix).

[0227] Considering that different transmission channels cannot borrow power, the power shrinkage factor of the above codebook = the number of ports with power greater than 0 / the total number of ports, resulting in some codewords being unable to transmit at full power. For example, in the codebook for uplink transmission of 2 antenna ports and 1 transmission layer in Table 1, the codeword The power shrinkage factor is 1, but the codeword and codeword The power shrinkage factor is 1 / 2. That is, if the network device schedules the terminal device to use the codeword Or codeword For uplink transmission, even if the transmission power of each transmission channel of the terminal device can reach the maximum transmission power of the transmission channel allowed by the corresponding frequency band, the actual total transmission power of the non-zero power antenna port of the terminal device cannot exceed 1 / 2 of the maximum total transmission power of the terminal device. Obviously, the terminal device cannot achieve full power transmission.

[0228] In order to solve the problem that some codewords in the codebook cannot be transmitted at full power, resulting in limited uplink transmission performance of terminal equipment and thus limiting uplink capacity, the uplink transmission performance can be improved through the transmission power optimization solution of the terminal equipment.

[0229] This optimization scheme is a method for indicating the full-power transmission capability of a terminal device based on a codebook subset. Specifically, if the terminal device has the uplink transmission capability of multiple transmission channels in a frequency band, the terminal device can determine at least one codeword (i.e., a full-power transmission codebook subset) that can achieve uplink full-power transmission in a codebook that meets the transmission conditions based on its transmission capability, and then the terminal device can report a full-power transmission capability indication to the network device, and the full-power transmission capability indication is used to indicate the full-power transmission codebook subset. The network device can determine the full-power transmission codebook subset of the terminal device based on the full-power transmission capability indication, so that when the network device schedules the codeword for uplink transmission for the terminal device, it can refer to the determined full-power transmission codebook subset. When the network device schedules any codeword in the full-power transmission codebook subset for the terminal device for uplink transmission, the terminal device can achieve uplink full-power transmission of the terminal device by setting the power contraction factor of the codeword to 1.

[0230] In various embodiments of the present application, the information element indicating the full power transmission capability may be expressed as (full power transmission), which may be carried in UE capability information (UE capability) for transmission.

[0231] Example 1: When the terminal device has the uplink transmission capability of two transmission channels (2Tx) on one frequency band, and the codebook that meets the current transmission conditions is the codebook shown in Table 1, then the terminal device can use a 2-bit full power transmission capability indication to indicate the full power transmission codebook subset:

[0232] Scenario 1: If any of the two transmission channels of the terminal device can achieve full power transmission, the terminal device can determine the full power transmission codebook subset in the codebook shown in Table 1 as The terminal device may report a full power transmission capability indication with a value of "11" to the network device. The network device may determine the full power transmission codebook subset of the terminal device based on the full power transmission capability indication. When a network device schedules codewords for a terminal device or codeword When performing uplink transmission, the terminal device can set the power contraction factor of the codeword to 1 to achieve full uplink power transmission.

[0233] Scenario 2: If the transmitting channel Tx0 of the terminal device can achieve full power transmission, but the transmitting channel Tx1 cannot achieve full power transmission, the terminal device can determine the full power transmission codebook subset in the codebook described in Table 1 as The terminal device may report a full power transmission capability indication with a value of "10" to the network device. The network device may determine the full power transmission codebook subset of the terminal device based on the full power transmission capability indication. When a network device schedules codewords for a terminal device When performing uplink transmission, the terminal device can set the power contraction factor of the codeword to 1 to achieve full uplink power transmission.

[0234] Scenario 3: If the transmitting channel Tx1 of the terminal device can achieve full power transmission, but the transmitting channel Tx0 cannot achieve full power transmission, the terminal device can determine the full power transmission codebook subset in the codebook described in Table 1 as The terminal device may report a full power transmission capability indication with a value of "01" to the network device. The network device may determine the full power transmission codebook subset of the terminal device based on the full power transmission capability indication. When a network device schedules codewords for a terminal device When performing uplink transmission, the terminal device can set the power contraction factor of the codeword to 1 to achieve full uplink power transmission.

[0235] In scenarios 1 to 3 in Example 1 above, the correspondence between the full-power transmission capability indication and the full-power transmission codebook subset is shown in Table 8 below.

[0236] It should also be noted that in the above-mentioned transmission power optimization scheme for the terminal device, after determining the full-power transmission codebook subset, the network device can also determine the maximum transmission power of each transmission channel of the terminal device according to the full-power transmission codebook subset. The following is only explained with the power class (Power Class, PC) of each frequency band of the terminal device as PC3, that is, the maximum total transmission power of the terminal device allowed by each frequency band is 23dBm. However, it should be noted that the following examples and the solutions provided in the embodiments of the present application are not limited to PC3, and are still applicable when the maximum total transmission power of the terminal device allowed by each frequency band is other values.

[0237] Example 2: Continuing with the example of a terminal device having two transmission channels on one frequency band, as shown in Table 8: When the full-power transmission capability indication is "11", the network device can infer that the maximum transmission powers of the two transmission channels are both 23dBm; when the full-power transmission capability indication is "10", the network device can infer that the maximum transmission power of the transmission channel Tx0 is 23dBm; when the full-power transmission capability indication is "01", the network device can infer that the maximum transmission power of the transmission channel Tx1 is 23dBm.

[0238] Table 8

[0239]

[0240] "X" in Table 8 indicates an unknown number less than 23dBm.

[0241] Example 3: If the terminal device has an uplink transmission capability of 4 transmission channels (4Tx) on a frequency band, as shown in Table 9, when the antenna port coherence capability of the terminal device is non-coherent, the full-power transmission capability indication sent by the terminal device can indicate one TPMI group (TPMI Group) in G0~G3; when the antenna port coherence capability of the terminal device is partially coherent or fully coherent, the full-power transmission capability indication sent by the terminal device can indicate one TPMI Group in G0~G3 and one TPMI Group in G4~G6.

[0242] As shown in Table 10, the codewords included in TPMI Groups G0 to G6 are all subsets of the uplink precoding codebooks shown in Tables 1 to 7.

[0243] As shown in the last column of Table 9, the network device can roughly infer the maximum transmit power of each transmit channel of the terminal device based on the full power transmit codebook subset (TPMI Group) indicated by the full power transmit capability indication sent by the terminal device. For example, if the full power transmit capability indication sent by the terminal device indicates TPMI Group G0, it means that the transmit channel Tx0 can achieve full power transmission, and the network device can infer that the maximum transmit power of Tx0 can reach 23dBm.

[0244] In addition, if the network device schedules the terminal device to use the codeword For uplink transmission, the terminal device can set the power reduction factor to 1 to achieve full uplink power transmission.

[0245] Table 9

[0246]

[0247] "X" in Table 9 indicates an unknown number less than 23dBm.

[0248] Table 10

[0249]

[0250]

[0251] In such Figure 1A In the mobile communication system shown, in order to optimize the uplink transmission performance, the network equipment needs to consider the maximum transmission power constraint of each transmission channel of the terminal device, that is, the transmission power allocated to each transmission channel cannot exceed its maximum allowed transmission power, otherwise the actual transmission performance may be significantly different from the theoretical performance.

[0252] Through the above description of the transmit power optimization scheme for the terminal device, and Tables 8-10, it can be seen that after the terminal device reports the full-power transmit codebook subset, the network device can roughly estimate the maximum transmit power of each transmit channel of the terminal device based on the full-power transmit codebook subset. However, due to the limitation of the full-power transmit codebook subset, if only relying on the existing method, the network device can only estimate the maximum transmit power of each transmit channel when the terminal device indicates a specific codeword, or can only estimate the maximum transmit power of some transmit channels, and cannot accurately obtain the maximum transmit power of all transmit channels of the terminal device. For example, when the terminal device has two transmit channels on a frequency band, as shown in Table 8, when the full-power transmit capability of the terminal device is indicated as "10", the network device can estimate that the maximum transmit power of the transmit channel Tx0 is 23dBm, and the maximum transmit power of Tx1 is less than 23dBm, but it is impossible to accurately estimate whether the maximum transmit power of Tx1 is 20dBm or 17dBm.

[0253] In order to enable the network device to accurately determine the maximum transmit power of each transmit channel of the terminal device, an embodiment of the present application provides a method for determining the maximum transmit power of a transmit channel. The method may be, but is not limited to, the methods provided in the following embodiments 1 and 2.

[0254] Embodiment 1:

[0255] The terminal device reports to the network device the maximum transmit power of the transmit channel on each frequency band supported by the terminal device. For example, the terminal device can indicate that the maximum transmit power of a transmit channel is 23dBm, 20dBm, or 17dBm through a 3-bit bit sequence.

[0256] Specifically, the terminal device may determine the maximum transmit power of the transmit channel on the first frequency band according to the uplink transmit capability of the transmit channel on the first frequency band, the maximum total transmit power of the terminal device allowed on the first frequency band, and other information. Figure 2 As shown in S201, the terminal device sends transmission power indication information to the network device, where the transmission power indication information is used to indicate the maximum transmission power of a transmission channel in a first frequency band.

[0257] In a first implementation, the transmit power indication information includes at least one field. Each field corresponds to a frequency band. Any field is used to indicate the maximum transmit power of a transmit channel on the frequency band corresponding to the field.

[0258] In addition, each field may include at least one indication field. Each indication field is used to indicate the maximum transmit power of a transmit channel on the frequency band corresponding to the field. The number of indication fields included in each field is the same as the number of transmit channels operating on the frequency band corresponding to the field.

[0259] In a second implementation, the transmit power indication information may be carried in different cells, wherein each cell corresponds to a frequency band. The transmit power indication information carried in any cell is used to indicate the maximum transmit power of the transmit channel in the frequency band corresponding to the cell.

[0260] Similar to the first implementation, each cell may include at least one indication field. Each indication field is used to indicate the maximum transmit power of a transmit channel on the frequency band corresponding to the cell. Then the number of indication fields included in each cell is the same as the number of transmit channels operating on the frequency band corresponding to the cell.

[0261] Through the method provided in the embodiments of the present application, Figure 2As shown in S202, the network device can directly determine the maximum transmit power of the transmit channel of the terminal device in the first frequency band according to the transmit power indication information sent by the terminal device.

[0262] It should be noted that this method requires the terminal device to send additional transmission power indication information, which will result in more signaling overhead for the mobile communication system.

[0263] Embodiment 2:

[0264] Based on the traditional full-power transmission capability indication method based on codebook subset, the embodiments of the present application can further expand the full-power transmission capability indication by adding indication information for indicating the value distribution of the maximum transmission power of the transmission channel in the full-power transmission capability indication, thereby enabling the network device to determine the maximum transmission power of each transmission channel of the terminal device based on the full-power transmission codebook subset and the value distribution of the maximum transmission power of the transmission channel, without having to add a large amount of additional signaling overhead.

[0265] The following is an example of the first frequency band supported by the terminal device. Specifically, the terminal device can be based on the uplink transmission capability of the transmission channel on the first frequency band, the maximum total transmission power of the terminal device allowed on the first frequency band, the full power transmission codebook set corresponding to the first frequency band, and the maximum transmission power of the transmission channel on the first frequency band. Then Figure 3 As shown in S301 in FIG. 1 , the terminal device sends a full-power transmission capability indication to the network device.

[0266] The full power transmission capability indication includes first indication information and second indication information. The first indication information is used to indicate the full power transmission codebook subset corresponding to the first frequency band, and the second indication information is used to indicate the value distribution of the maximum transmission power of the transmission channel on the first frequency band.

[0267] In the embodiment of the present application, the second indication information may indicate the value distribution of the maximum transmit power of the transmit channel on the first frequency band through, but not limited to, the following implementation modes:

[0268] In a first implementation manner, the second indication information is used to indicate that the maximum transmit power of all transmit channels in the first frequency band is greater than or equal to a first preset value.

[0269] In this embodiment, when the full-power transmission capability indication sent by the terminal device includes the second indication information, it indicates that the maximum transmission power of all transmission channels on the first frequency band is greater than or equal to the first preset value; when the full-power transmission capability indication sent by the terminal device does not include the second indication information, it indicates that the maximum transmission power of at least one transmission channel on the first frequency band is less than the first preset value.

[0270] In a second embodiment, when the second indication information takes a first value, the second indication information indicates that the maximum transmission power of all antenna ports on the first frequency band is greater than or equal to a first preset value; when the second indication information takes a second value, the second indication information indicates that the maximum transmission power of at least one antenna port on the first frequency band is less than the first preset value.

[0271] The first preset value is less than the maximum total transmit power P of the terminal device allowed by the first frequency band. For example, the first preset value = P-3.

[0272] Exemplarily, the terminal device has two antenna ports on the first frequency band. In this case:

[0273] When the full power transmission codebook subset indicated by the first indication information is When the maximum transmit powers of the two antenna ports on the first frequency band are P and P respectively, the second indication information indicates that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to the first preset value.

[0274] When the full power transmission codebook subset indicated by the first indication information is or And when the maximum transmission powers of the two antenna ports on the first frequency band are P and the first preset value respectively, the second indication information indicates that the maximum transmission power of all antenna ports on the first frequency band is greater than or equal to the first preset value.

[0275] When the full power transmission codebook subset indicated by the first indication information is or And when the maximum transmission powers of the two antenna ports on the first frequency band are P and the second preset value respectively, the second indication information indicates that the maximum transmission power of at least one antenna port on the first frequency band is less than the first preset value; wherein the second preset value is less than the first preset value.

[0276] When the full-power transmission codebook subset indicated by the first indication information is empty, and the maximum transmission powers of the two antenna ports on the first frequency band are respectively the first preset value and the first preset value, the second indication information indicates that the maximum transmission power of all antenna ports on the first frequency band is greater than or equal to the first preset value.

[0277] Optionally, when the second indication information indicates that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to the first preset value, the second indication information is used to indicate the indication codeword

[0278] like Figure 3 As shown in S302, after the network device receives the full-power transmission capability indication from the terminal device, it can determine the maximum transmission power of the transmission channel of the terminal device in the first frequency band according to the full-power transmission codebook subset indicated by the first indication information and the value distribution indicated by the second indication information.

[0279] The following description continues with the example that the terminal device has two antenna ports in the first frequency band.

[0280] When the full power transmission codebook subset indicated by the first indication information is And when the second indication information indicates that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to the first preset value, the maximum transmit powers of the two antenna ports on the first frequency band are P and P respectively.

[0281] When the full power transmission codebook subset indicated by the first indication information is or And when the second indication information indicates that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to the first preset value, the maximum transmit powers of the two antenna ports on the first frequency band are P and the first preset value respectively.

[0282] When the full power transmission codebook subset indicated by the first indication information is or And when the second indication information indicates that the maximum transmission power of at least one antenna port on the first frequency band is less than the first preset value, the maximum transmission powers of the two antenna ports on the first frequency band are P and the second preset value respectively; wherein the second preset value is less than the first preset value.

[0283] When the full-power transmission codebook subset indicated by the first indication information is empty, and the second indication information indicates that the maximum transmission power of all antenna ports on the first frequency band is greater than or equal to the first preset value, the maximum transmission power of the two antenna ports on the first frequency band are the first preset value and the first preset value, respectively.

[0284] The following is an example in which a terminal device has two transmission channels (Tx0 and Tx1) on a frequency band, and the power level of the frequency band is PC3. The second indication information in the full power transmission capability indication is used to indicate that when the maximum transmission power of all antenna ports on the frequency band is greater than or equal to the first preset value, the second indication information is used to indicate the indication codeword In other words, the first indication information and the second indication information in the full power transmission capability indication may jointly indicate an extended full power transmission codebook subset. In some cases, the extended full power transmission codebook subset may include the indication codeword.

[0285] For example, the present application expands the candidate codeword set of the full-power transmission codebook subset corresponding to the two transmission channels, and adds an indicator codeword If the extended full power transmission codebook subset indicated by the terminal device contains the codeword This means that the maximum transmit power of each transmit channel can reach at least 20dBm. Therefore, the network device can It is determined whether the maximum transmit power of the target transmit channel is 20 dBm or 17 dBm. The target transmit channel is a transmit channel with a maximum transmit power less than 23 dBm.

[0286] As shown in Table 11, based on the codeword indicated by the full-power transmission capability indication reported by the terminal device, the network device can accurately determine the maximum transmission power of each transmission channel of the terminal device. For example, when the terminal device reports a full-power transmission capability indication with a value of "101", the network device can determine that the maximum transmission power of Tx0 is 23dBm and the maximum transmission power of Tx1 is 20dBm. For another example, when the terminal device reports a full-power transmission capability indication with a value of "100", the network device can determine that the maximum transmission power of Tx0 is 23dBm and the maximum transmission power of Tx1 is 17dBm.

[0287] Table 11

[0288]

[0289] By comparing Table 11 and Table 8, it can be seen that in the same scenario, the method provided in the embodiment of the present application expands the traditional full-power transmission codebook subset and adds an indication codeword (the third codeword column newly added in Table 11). Then, the full-power transmission capability indication transmitted in the mobile communication system increases the overhead by 1 bit, so that the network device can accurately determine the transmission power of each transmission channel.

[0290] Through the method provided in the embodiment of the present application, the network device can directly determine the full-power transmission codebook subset corresponding to the first frequency band and the value distribution of the maximum transmission power of the transmission channel on the first frequency band according to the full-power transmission capability indication sent by the terminal device, thereby determining the maximum transmission power of each transmission channel of the terminal device on the first frequency band according to the two pieces of information. Compared with the first embodiment, this method does not require the terminal device to send additional transmission power indication information, and does not cause more signaling overhead in the mobile communication system.

[0291] It should also be noted that, when the mobile communication system supports the terminal device transmit channel resource pooling solution, in order to enable the network device to determine the maximum transmit power of each transmit channel on a certain frequency band after the transmit channel is switched, based on the methods provided in Embodiments 1 and 2, the present application provides the following implementation methods:

[0292] The first implementation mode: After the transmission channel of the terminal device is switched, the terminal device re-adopts the method provided in the first or second embodiment to determine the maximum transmission power of each transmission channel on the target frequency band, and indicates the maximum transmission power of each transmission channel on the target frequency band through the transmission power indication information or the full power transmission capability indication. The specific process can be referred to the description in the above embodiment, which will not be repeated here.

[0293] The second implementation method: Considering that the maximum transmission power of the transmission channel in different frequency bands may have different values. Therefore, the terminal device can send the switching adjustment value of the transmission channel (such as the power backoff value, 0dBm, 3dBm or 6dBm) to the network device. For example, the maximum transmission power of the two transmission channels (Tx2 and Tx3) of the terminal device on frequency band 2 before switching is 23dBm, and the maximum transmission power after switching to frequency band 1 is 20dBm. Then the terminal device can send the switching adjustment value of Tx2 to the network device as -3dBm, and the switching adjustment value of Tx2 as -3dBm.

[0294] In this way, the network device can determine the maximum transmit power of the target transmit channel after the transmit channel is switched according to the maximum transmit power of the target transmit channel before the transmit channel is switched and the switch adjustment value of the target transmit channel.

[0295] exist Figure 1AIn the mobile communication system shown, in order to further improve the uplink capacity in the mobile communication system, the mobile communication system can adopt a terminal device transmission channel resource pooling solution, allowing the terminal device's transmission channel to be flexibly switched to different frequency bands. However, if the traditional terminal device transmission power optimization solution is still used in this scenario, then although the terminal device will report the full-power transmission full-book subset that can achieve full-power transmission for each frequency band, the network device cannot determine the full-power transmission codebook subset of the terminal device after the transmission channel is switched, and thus cannot perform accurate scheduling.

[0296] For example, if the terminal device supports two transmission channels on both band 1 and band 2, the two transmission channels on band 2 can be switched to band 1, forming four transmission channels for uplink parallel transmission on band 1. Figure 4 As shown in the figure, the terminal device has two uplink transmission channels on both band 1 and band 2, where the two uplink transmission channels on band 1 are Tx0 and Tx1, and the two uplink transmission channels on band 2 are Tx2 and Tx3, and Tx2 and Tx3 on band 2 can be connected to the switch and switched to band 1, so that after the transmission channel is switched, there are 4 uplink transmission channels on band 1 (i.e. Figure 4 If only based on the content reported by the existing terminal equipment (including the full-power transmission codebook subset corresponding to each frequency band before the transmission antenna is switched, the coherence capability of the transmission channel, the power level, etc.), the network equipment cannot determine the full-power transmission codebook subset corresponding to frequency band 1 after the transmission channel is switched, and thus cannot accurately schedule uplink data transmission.

[0297] Based on this, the present application provides a method for determining a full-power transmission codebook subset, which is used to enable a network device to determine a full-power transmission codebook subset of a terminal device after a transmission channel is switched. The method may be, but is not limited to, the following embodiments 3 and 4.

[0298] Embodiment three:

[0299] The terminal device reports to the network device the full-power transmission codebook subset corresponding to each frequency band supported by the terminal device before the transmission channel is switched, and the full-power transmission codebook subset corresponding to each frequency band supported by the terminal device after the transmission channel is switched.

[0300] Specifically, the terminal device can determine the full-power transmission codebook subset corresponding to each frequency band before the transmission channel is switched, and the full-power transmission codebook subset corresponding to each frequency band after the transmission channel is switched, based on the uplink transmission capability of the transmission channel on each frequency band. Taking the target frequency band after switching as an example, the terminal device determines the full-power transmission codebook subset corresponding to the target frequency band after the antenna port of the terminal device is switched, based on the uplink transmission capability of the transmission channel on the target frequency band. Then Figure 5As shown in S501, the terminal device sends a full-power transmission capability indication to the network device, and the full-power transmission capability indication is used for the full-power transmission codebook subset corresponding to the target frequency band after the transmission channel of the terminal device is switched.

[0301] Optionally, the full-power transmission capability indication further includes a full-power transmission codebook subset corresponding to each frequency band supported by the terminal device before the transmission channel is switched.

[0302] In a first implementation, the full-power transmission capability indication includes a first field and a second field, wherein the first field is used to indicate the full-power transmission codebook subset corresponding to each frequency band before switching, and the second field is used to indicate the full-power transmission codebook subset corresponding to the target frequency band after the transmission channel is switched.

[0303] In addition, the first field may include at least one first indication field, each first indication field being used to indicate a full-power transmission codebook subset corresponding to a frequency band before the transmission channel is switched. The number of the first indication fields in the first field is equal to the number of frequency bands supported by the terminal device before the transmission channel is switched.

[0304] The second field may include at least one second indication field, each second indication field being used to indicate a full-power transmission codebook subset corresponding to a frequency band after switching. The number of the second indication fields in the second field corresponds to the number of frequency bands supported by the terminal device after the transmission channel is switched. There is a second indication field in the at least one second indication field indicating a full-power transmission codebook subset corresponding to the target frequency band after switching.

[0305] Finally, the value of each indication field can be determined by the full-power transmission codebook subset indicated by it. For details, please refer to Table 8-Table 10 above, which will not be repeated here.

[0306] In a second implementation, the full-power transmission capability indication may be carried in different information elements, wherein the full-power transmission capability indication carried in the first information element is used to indicate the full-power transmission codebook subset corresponding to each frequency band before switching, and the full-power transmission capability indication carried in the second information element is used to indicate the full-power transmission codebook subset corresponding to each frequency band after the transmission channel is switched.

[0307] Similar to the first implementation, the first information element may include at least one first indication field, and the second information element may include at least one second indication field. For the content, number, and value indicated by the first indication field and the second indication field, reference may be made to the description in the first implementation above, and no further details will be given here.

[0308] In the third implementation, the full power transmission capability indication indicating the full power transmission codebook subsets corresponding to different frequency bands is carried in different information elements. One frequency band corresponds to one information element, and the same frequency band corresponds to different information elements before and after switching. That is, there is an indication field in a full power transmission codebook subset, and the indication field is used to indicate the full power transmission codebook subset corresponding to a frequency band.

[0309] In this embodiment, if Figure 5 As shown in S502, the network device can determine the full-power transmission codebook subset corresponding to the target frequency band after the terminal device transmits a channel switch through the full-power transmission capability indication reported by the terminal device.

[0310] In this way, before the transmission channel of the terminal device is switched, the network device can schedule the codewords for uplink transmission for the terminal device working on the first frequency band according to the full-power transmission codebook subset corresponding to the first frequency band before the transmission channel is switched. After the transmission channel of the terminal device is switched, the network device can schedule the codewords for uplink transmission for the terminal device working on the second frequency band according to the full-power transmission codebook subset corresponding to the second frequency band after the transmission channel is switched. Finally, the uplink transmission power of the terminal device is optimized.

[0311] Continue with Figure 4 For example, the terminal device needs to report the full power transmission codebook subset 1 corresponding to Tx0 and Tx1 on frequency band 1, the full power transmission codebook subset 2 corresponding to Tx2 and Tx3 on frequency band 2, and the full power transmission codebook subset 3 corresponding to Tx0-Tx3 on frequency band 1 after the transmission channel is switched. Compared with the traditional method, this method requires the terminal device to additionally report the full power transmission codebook subset after the transmission channel is switched, which will increase the signaling overhead of the full power transmission capability indication.

[0312] Embodiment 4: Figure 6 shown.

[0313] S601: Similar to the conventional method, the terminal device reports the full-power transmission codebook subset corresponding to the frequency band supported by the terminal device before the transmission channel switching to the network device through the full-power transmission capability indication.

[0314] Specifically, the terminal device may determine the full-power transmission codebook subset corresponding to each frequency band before the transmission channel is switched according to the uplink transmission capability of the transmission channel on each supported frequency band.

[0315] S602: The network device and the terminal device can determine the full-power transmission codebook subset corresponding to the frequency band supported by the terminal device before the transmission channel is switched according to the full-power transmission capability indication; and determine the full-power transmission codebook subset corresponding to the target frequency band after the transmission channel of the terminal device is switched according to the full-power transmission codebook subsets corresponding to multiple source frequency bands and set rules.

[0316] The multiple source frequency bands are the frequency bands where the multiple target transmission channels are located before the transmission channel is switched; the multiple target antenna ports are the transmission channels on the target frequency band after the transmission channel is switched; the setting rule is used to indicate the correspondence between the full-power transmission codebook subsets corresponding to the multiple source frequency bands before the transmission channel is switched and the full-power transmission codebook subsets corresponding to the target frequency band after the transmission channel is switched. The target frequency band is the frequency band where the corresponding transmission channel changes before and after the transmission channel is switched.

[0317] In one implementation, the setting rule may be determined by the network device according to the coherence capabilities (completely coherent, partially coherent, or incoherent) of the multiple target transmission channels corresponding to the target frequency band.

[0318] Optionally, the network device may determine the coherence capabilities of the multiple target transmission channels corresponding to the target frequency band in multiple ways.

[0319] Mode 1: The terminal device sends a first coherent capability indication to the network device, wherein the first coherent capability indication is used for the coherent capability of multiple target transmission channels on the target frequency band after the transmission channel is switched.

[0320] Optionally, the first coherence capability indication is also used to indicate the coherence capability of the transmission channel on the frequency band supported by the terminal device before the transmission channel is switched.

[0321] In the first method, the network device may determine the coherence capability of the target frequency band corresponding to the multiple target transmission channels according to the first coherence capability indication.

[0322] Continue with Figure 4 For example, the first coherence capability indication sent by the terminal device to the network device may indicate: the coherence capability (coherent or incoherent) of Tx0 and Tx1 on band 1 before the transmission channel is switched, the coherence capability of Tx2 and Tx3 on band 2 before the transmission channel is switched, and the coherence capability (fully coherent or partially coherent or incoherent) of Tx0-Tx3 on band 1 after the transmission channel is switched.

[0323] Method 2: The terminal device sends a second coherence capability indication to the network device. The second coherence capability indication is used to indicate the coherence capability of the transmission channel between the multiple source frequency bands before the transmission channel is switched (i.e., the coherence capability of the transmission channel across frequency bands); the network device can determine the coherence capability of the multiple target antenna ports based on the coherence capability of the antenna ports on the multiple source frequency bands and the coherence capability of the transmission channel between the multiple source frequency bands.

[0324] In method 2, the network device determines multiple source frequency bands where multiple target transmission channels on the target frequency band are located; then determines the coherence capability of the multiple target transmission channels on the target frequency band based on the coherence capability of the transmission channel corresponding to each source frequency band and the coherence capability of the transmission channels between the multiple source frequency bands.

[0325] Continue with Figure 4 For example, the first coherence capability indication sent by the terminal device to the network device may indicate: the coherence capability (coherent or incoherent) of Tx0 and Tx1 on band 1 before the transmission channel is switched, the coherence capability of Tx2 and Tx3 on band 2 before the transmission channel is switched, and the coherence capability (coherent or incoherent) between Tx2 and Tx3 on band 2 and Tx0 and Tx1 on band 1 after they are switched to band 1.

[0326] Based on the above method, the present application provides the following possible implementation methods: In each implementation method, the terminal device supports the first frequency band and the second frequency band, and there are two antenna ports on the first frequency band before the antenna port is switched, and there are two antenna ports on the second frequency band before the antenna port is switched; wherein, at least one antenna port on the second frequency band can be switched to the third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; after the antenna port is switched, there are four antenna ports on the third frequency band. Optionally, the third frequency band can be the same as the first frequency band, or the same as the second frequency band, or the third frequency band is different from both the first frequency band and the second frequency band.

[0327] The first implementation method:

[0328] The setting rules conform to the corresponding relationship between the first column, the second column and the third column in Table 12 below:

[0329] Table 12

[0330]

[0331] Among them, the full-power transmission codebook subset corresponding to any frequency band is "00" indicating that the full-power transmission codebook subset is empty; G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" indicates all codewords in the uplink precoding codebook; "-" indicates non-existence.

[0332] In this embodiment, the two antenna ports on the first frequency band are incoherent, the two antenna ports on the second frequency band are incoherent, and after the antenna ports of the terminal device are switched, the four antenna ports on the third frequency band are incoherent.

[0333] After the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of a four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is assumed that after the antenna port of the terminal device is switched, the maximum transmit power of the first antenna port in the third frequency band is not less than the maximum transmit power of the third antenna port, the maximum transmit power of the third antenna port is not less than the maximum transmit power of the second antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

[0334] The second implementation method:

[0335] The setting rules conform to the corresponding relationship between the first column, the second column and the third column in Table 13 below:

[0336] Table 13

[0337]

[0338] Among them, the full-power transmission codebook subset corresponding to any frequency band is "00", indicating that the full-power transmission codebook subset is empty; G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full-power transmission codebook subset is the union of the two TPMI groups before and after "+"; "-" means it does not exist.

[0339] In this embodiment, two antenna ports on the first frequency band are coherent, two antenna ports on the second frequency band are coherent, and after the antenna ports of the terminal device are switched, the four antenna ports on the third frequency band are completely coherent.

[0340] After the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of the four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is assumed that after the antenna port of the terminal device is switched, the maximum transmit power of the first antenna port in the third frequency band is not less than the maximum transmit power of the third antenna port, the maximum transmit power of the third antenna port is not less than the maximum transmit power of the second antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

[0341] The third implementation method:

[0342] The setting rules conform to the corresponding relationship between the first column, the second column and the third column in Table 14 below:

[0343] Table 14

[0344]

[0345] Among them, the full-power transmission codebook subset corresponding to any frequency band is "00", indicating that the full-power transmission codebook subset is empty; G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full-power transmission codebook subset is the union of the two TPMI groups before and after "+"; "-" means it does not exist.

[0346] In this embodiment, two antenna ports on the first frequency band are coherent, two antenna ports on the second frequency band are coherent, and after the antenna ports of the terminal device are switched, the four antenna ports on the third frequency band are partially coherent.

[0347] After the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of the four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is assumed that after the antenna port of the terminal device is switched, the first antenna port and the third antenna port on the third frequency band are coherent, the second antenna port and the fourth antenna port are coherent, the maximum transmit power of the first antenna port is not less than the maximum transmit power of the third antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

[0348] The fourth implementation method:

[0349] The setting rules conform to the corresponding relationship between the first column, the second column and the third column in Table 15 below:

[0350] Table 15

[0351]

[0352] Among them, the full-power transmission codebook subset corresponding to any frequency band is "00", indicating that the full-power transmission codebook subset is empty; G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full-power transmission codebook subset is the union of the two TPMI groups before and after "+"; "-" means it does not exist.

[0353] In this embodiment, the two antenna ports on the first frequency band are coherent and the two antenna ports on the second frequency band are incoherent, or the two antenna ports on the first frequency band are incoherent and the two antenna ports on the second frequency band are coherent; after the antenna ports of the terminal device are switched, only two of the four antenna ports on the third frequency band are coherent.

[0354] After the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of the four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is assumed that after the antenna port of the terminal device is switched, the first antenna port and the third antenna port on the third frequency band are coherent, the second antenna port and the fourth antenna port are incoherent, the maximum transmit power of the first antenna port is not less than the maximum transmit power of the third antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

[0355] The fifth implementation method:

[0356] The setting rules conform to the corresponding relationship between the first column, the second column and the third column in Table 16 below:

[0357] Table 16

[0358]

[0359] Among them, G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full power transmit codebook subset is the union of the two TPMI groups before and after "+";

[0360] Any codeword contained in the full power transmission codebook subset is an indication codeword; when the full-power transmission codebook subset corresponding to any frequency band contains the indication codeword, it indicates that the maximum transmission power of each antenna port on the frequency band is greater than or equal to a preset value; when the full-power transmission codebook subset corresponding to any frequency band does not contain the indication codeword, it indicates that there is at least one antenna port on the frequency band with a maximum transmission power less than the preset value.

[0361] In this embodiment, the two antenna ports on the first frequency band are incoherent, the two antenna ports on the second frequency band are incoherent, and after the antenna ports of the terminal device are switched, the four antenna ports on the third frequency band are incoherent.

[0362] After the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of a four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is assumed that after the antenna port of the terminal device is switched, the maximum transmit power of the first antenna port in the third frequency band is not less than the maximum transmit power of the third antenna port, the maximum transmit power of the third antenna port is not less than the maximum transmit power of the second antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

[0363] The sixth implementation method:

[0364] The setting rules conform to the corresponding relationship between the first column, the second column and the third column in Table 17 below:

[0365] Table 17

[0366]

[0367] Among them, G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full power transmit codebook subset is the union of the two TPMI groups before and after "+";

[0368] Any codeword contained in the full power transmission codebook subset is an indication codeword; when the full-power transmission codebook subset corresponding to any frequency band contains the indication codeword, it indicates that the maximum transmission power of each antenna port on the frequency band is greater than or equal to a preset value; when the full-power transmission codebook subset corresponding to any frequency band does not contain the indication codeword, it indicates that there is at least one antenna port on the frequency band with a maximum transmission power less than the preset value.

[0369] In this embodiment, two antenna ports on the first frequency band are coherent, two antenna ports on the second frequency band are coherent, and after the antenna ports of the terminal device are switched, the four antenna ports on the third frequency band are completely coherent.

[0370] After the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of the four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is assumed that after the antenna port of the terminal device is switched, the maximum transmit power of the first antenna port in the third frequency band is not less than the maximum transmit power of the third antenna port, the maximum transmit power of the third antenna port is not less than the maximum transmit power of the second antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

[0371] The seventh implementation method:

[0372] The setting rules conform to the corresponding relationship between the first column, the second column and the third column in Table 18 below:

[0373] Table 18

[0374]

[0375] Among them, G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full power transmit codebook subset is the union of the two TPMI groups before and after "+";

[0376] Any codeword contained in the full power transmission codebook subset is an indication codeword; when the full-power transmission codebook subset corresponding to any frequency band contains the indication codeword, it indicates that the maximum transmission power of each antenna port on the frequency band is greater than or equal to a preset value; when the full-power transmission codebook subset corresponding to any frequency band does not contain the indication codeword, it indicates that there is at least one antenna port on the frequency band with a maximum transmission power less than the preset value.

[0377] In this embodiment, two antenna ports on the first frequency band are coherent, two antenna ports on the second frequency band are coherent, and after the antenna ports of the terminal device are switched, the four antenna ports on the third frequency band are partially coherent.

[0378] After the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of the four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is assumed that after the antenna port of the terminal device is switched, the first antenna port and the third antenna port on the third frequency band are coherent, the second antenna port and the fourth antenna port are coherent, the maximum transmit power of the first antenna port is not less than the maximum transmit power of the third antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

[0379] The eighth implementation method:

[0380] The setting rules conform to the corresponding relationship between the first column, the second column and the third column in Table 19 below:

[0381]

[0382]

[0383] Among them, G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full power transmit codebook subset is the union of the two TPMI groups before and after "+";

[0384] Any codeword contained in the full power transmission codebook subset is an indication codeword; when the full-power transmission codebook subset corresponding to any frequency band contains the indication codeword, it indicates that the maximum transmission power of each antenna port on the frequency band is greater than or equal to a preset value; when the full-power transmission codebook subset corresponding to any frequency band does not contain the indication codeword, it indicates that there is at least one antenna port on the frequency band with a maximum transmission power less than the preset value.

[0385] In this embodiment, the two antenna ports on the first frequency band are coherent and the two antenna ports on the second frequency band are incoherent, or the two antenna ports on the first frequency band are incoherent and the two antenna ports on the second frequency band are coherent; after the antenna ports of the terminal device are switched, only two of the four antenna ports on the third frequency band are coherent.

[0386] After the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of the four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is assumed that after the antenna port of the terminal device is switched, the first antenna port and the third antenna port on the third frequency band are coherent, the second antenna port and the fourth antenna port are incoherent, the maximum transmit power of the first antenna port is not less than the maximum transmit power of the third antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

[0387] In addition, in the method provided in the embodiment of the present application, the network device may also determine the maximum transmit power of the multiple target transmit channels on the target frequency band in the following manner:

[0388] Method 1: The network device determines the maximum transmit power of the multiple target transmit channels on the target frequency band according to the full power transmit codebook subset corresponding to the target frequency band. The specific process can refer to the process of inferring the maximum transmit power of each transmit channel from the traditional full power transmit codebook subset, which will not be repeated here.

[0389] Method 2: The network device receives transmission power indication information from the terminal device, where the transmission power indication information is used to indicate the maximum transmission power of the terminal device in the multiple target transmission channels after the antenna port is switched.

[0390] Mode 3: This mode is implemented when the communication system supports the method provided in the above-mentioned embodiment 2 to determine the maximum transmit power of the transmit channel on the frequency band supported by the terminal device. Take the multiple source frequency bands of multiple target transmit channels on the target frequency band as the first frequency band and the second frequency band as an example for explanation.

[0391] The network device receives a first full-power transmission capability indication from the terminal device; and receives a second full-power transmission capability indication from the terminal device; wherein the first full-power transmission capability indication includes first indication information and second indication information, and the second full-power transmission capability indication includes third indication information and fourth indication information; the first indication information is used to indicate a full-power transmission codebook subset corresponding to the first frequency band, and the second indication information is used to indicate a value distribution of the maximum transmission power of a transmission channel on the first frequency band; the third indication information is used to indicate a full-power transmission codebook subset corresponding to the second frequency band, and the fourth indication information is used to indicate a value distribution of the maximum transmission power of a transmission channel on the second frequency band;

[0392] The network device determines the maximum transmission power of the multiple target antenna ports on the target frequency band based on the full-power transmission codebook subset corresponding to the first frequency band indicated by the first indication information, the value distribution indicated by the second indication information, the full-power transmission codebook subset corresponding to the second frequency band indicated by the third indication information, and the value distribution indicated by the fourth indication information.

[0393] Specifically, the network device may determine the maximum transmit power of the transmit channel on the first frequency band based on the full-power transmit codebook subset indicated by the first indication information and the value distribution indicated by the second indication information. The network device may determine the maximum transmit power of the transmit channel on the second frequency band based on the full-power transmit codebook subset indicated by the third indication information and the value distribution indicated by the fourth indication information. The specific process can be referred to the description in Example 2 and will not be repeated here. Finally, the network device may determine the maximum transmit power of multiple target antenna ports on the target frequency band based on the maximum transmit power of the transmit channel on the first frequency band and the maximum transmit power of the transmit channel on the second frequency band.

[0394] Through the method provided in this embodiment, the full-power transmission codebook subset after the transmission channel is switched follows the setting rules, and both the network device and the terminal device follow the setting rules to determine the full-power transmission codebook subset corresponding to the target frequency band after the transmission channel is switched. Then, compared with the method provided in Example 1, the terminal device does not need to additionally report the full-power transmission codebook subset after the transmission channel is switched, and the signaling overhead of the full-power transmission capability indication will not be increased.

[0395] It should be noted that in the terminal device transmission channel resource pooling solution, when the network device schedules the codeword for uplink transmission for the terminal device, it will not only refer to the full-power transmission codebook subset corresponding to the target frequency band after the transmission channel is switched, but may also refer to the coherence capability of the transmission channel operating on the target frequency band. Among them, the target frequency band is the frequency band where the corresponding transmission channel changes before and after the transmission channel is switched. Therefore, the present application also provides a method for determining the coherence capability of the transmission channel, which can be applied to Example 3 and Example 4. The specific process of this method can refer to the description of the two ways in which the network device determines the coherence capability of the transmission channel corresponding to the target frequency band recorded in Example 4, which will not be repeated here.

[0396] It should also be noted that, similar to the traditional transmission power optimization scheme, in Examples 3 and 4, after the network device determines the full-power transmission codebook subset corresponding to the target frequency band after switching, the maximum transmission power of each transmission channel after switching can also be determined based on the maximum transmission power of the transmission channel before switching.

[0397] To facilitate the explanation of the setting rules, Figure 4 Take the scenario shown as an example, and take the power level of the terminal device in each frequency band as PC3, and the power adjustment value (such as power backoff value) after the transmission channel is switched as 0dBm (that is, the maximum transmission power before and after the transmission channel is switched) as an example. In different cases, the setting rules are shown in Tables 20 to 27. The corresponding relationship between the first column and the second column in each table is the setting rule.

[0398] Among them, in the following tables, the full-power transmission codebook subset corresponding to any frequency band is "00", which means that the full-power transmission codebook subset is empty. In addition, the full-power transmission codebook subset represented by each TPMI Group in the second column of each table can refer to the above Table 10. "mode0" means that the maximum transmission power of any transmission channel can reach 23dBm, that is, all codewords in the uplink precoding codebook can achieve full-power transmission; "X" represents an unknown number less than 23dBm; "-" means it does not exist. In each table, the "+" in the first column is used to distinguish the full-power transmission codebook subset corresponding to frequency band 1 and the full-power transmission codebook subset corresponding to frequency band 2. The "+" in the second column indicates that the full-power transmission codebook subset is the union of the two TPMI groups before and after "+"; the "+" in the third column indicates the value of the maximum transmission power used to distinguish different transmission channels.

[0399] After the transmission channel is switched, the order of the four transmission channels on frequency band 1 is Tx 1_0, Tx 1_1, Tx 1_2, and Tx 1_3. Among them, Tx 1_0 is associated with the first row of the four-port uplink precoding matrix, Tx 1_1 is associated with the second row of the four-port uplink precoding matrix, Tx 1_2 is associated with the third row of the four-port uplink precoding matrix, and Tx 1_3 is associated with the fourth row of the four-port uplink precoding matrix.

[0400] Table 20

[0401]

[0402] In the setting rules shown in Table 20, the newly added indicator codewords for the expansion of the full power transmission codebook subset corresponding to the two transmission channels are not considered. The two transmission channels on band 1 and the two transmission channels on band 2 are both incoherent, and the two transmission channels on band 2 are incoherent with the two transmission channels on band 1 after switching to band 1. That is, the four transmission channels on band 1 are incoherent after the transmission channels are switched.

[0403] After the transmission channel is switched, the order of the four transmission channels on the frequency band 1 is Tx 1_0, Tx 1_1, Tx 1_2, and Tx 1_3, and by default, the maximum transmission power of the four transmission channels on the frequency band 1 after switching satisfies: Tx 1_0 ≥ Tx 1_2 ≥ Tx 1_1 ≥ Tx1_3.

[0404] The third column is the maximum transmit power of each transmit channel inferred by the network device based on the full-power transmit codebook subset corresponding to each frequency band before the transmit channel is switched. For example, the full-power transmit codebook subset corresponding to frequency band 1 reported by the terminal device is The full power transmission codebook subset corresponding to frequency band 2 is As shown in the third row of Table 12, it means that the maximum transmit power of Tx0, Tx1 and Tx2 of the terminal device can reach 23dBm, and the maximum transmit power of Tx3 is less than 23dBm, as shown in the third row and third column of Table 12. The network device can determine that the full-power transmission codebook subset of the four transmission channels on band 1 after the transmission channel switching is TPMI Group G2 in Table 10. When the network device schedules the terminal device to use any codeword in G2 for uplink transmission on band 1, the terminal device can set the power contraction factor to 1 to achieve full-power transmission.

[0405] Table 21

[0406]

[0407] In the setting rules shown in Table 21, the newly added indicator codeword is not considered The two transmission channels on band 1 and the two transmission channels on band 2 are coherent, and the two transmission channels on band 2 are coherent with the two transmission channels on band 1 after switching to band 1. That is, the four transmission channels on band 1 are completely coherent after the transmission channels are switched.

[0408] After the transmission channel is switched, the order of the four transmission channels on the frequency band 1 is Tx 1_0, Tx 1_1, Tx 1_2, and Tx 1_3, and by default, the maximum transmission power of the four transmission channels on the frequency band 1 after switching satisfies: Tx 1_0 ≥ Tx 1_2 ≥ Tx 1_1 ≥ Tx1_3.

[0409] Table 22

[0410]

[0411]

[0412] In the setting rules shown in Table 22, the newly added indicator codeword is not considered The two transmission channels on band 1 and the two transmission channels on band 2 are coherent, and the two transmission channels on band 2 are incoherent with the two transmission channels on band 1 after switching to band 1. That is, the four transmission channels on band 1 are partially coherent after the transmission channels are switched.

[0413] After the transmit channel is switched, the order of the four transmit channels on band 1 is Tx 1_0, Tx 1_1, Tx 1_2, and Tx 1_3. By default, after the transmit channel is switched, Tx 1_0 and Tx 1_2 are coherent, Tx 1_1 and Tx 1_3 are coherent, and the maximum transmit power of the four transmit channels satisfies: Tx 1_0 ≥ Tx 1_2, Tx 1_1 ≥ Tx 1_3.

[0414] Table 23

[0415]

[0416] In the setting rules shown in Table 23, the newly added indicator codeword is not considered The two transmission channels on band 1 are coherent and the two transmission channels on band 2 are incoherent (or the two transmission channels on band 1 are incoherent and the two transmission channels on band 2 are coherent). After the two transmission channels on band 2 are switched to band 1, they are incoherent with the two transmission channels on band 1. That is, after the transmission channels are switched, only two of the four transmission channels on band 1 are coherent.

[0417] After the transmit channel is switched, the order of the four transmit channels on band 1 is Tx 1_0, Tx 1_1, Tx 1_2, and Tx 1_3. By default, after the transmit channel is switched, Tx 1_0 and Tx 1_2 on band 1 are coherent, Tx 1_1 and Tx 1_3 are incoherent, and the maximum transmit powers of the four transmit channels satisfy: Tx 1_0 ≥ Tx 1_2, Tx 1_1 ≥ Tx 1_3.

[0418] Table 24

[0419]

[0420] In the setting rules shown in Table 24, the newly added indicator codeword is considered The two transmission channels on band 1 and the two transmission channels on band 2 are both incoherent, and the two transmission channels on band 2 are incoherent with the two transmission channels on band 1 after switching to band 1. That is, the four transmission channels on band 1 are incoherent after the transmission channels are switched.

[0421] After the transmission channel is switched, the order of the four transmission channels on the frequency band 1 is Tx 1_0, Tx 1_1, Tx 1_2, and Tx 1_3, and by default, the maximum transmission power of the four transmission channels on the frequency band 1 after switching satisfies: Tx 1_0 ≥ Tx 1_2 ≥ Tx 1_1 ≥ Tx1_3.

[0422] Table 25

[0423]

[0424] In the setting rules shown in Table 25, the newly added indicator codeword is considered The two transmission channels on band 1 and the two transmission channels on band 2 are coherent, and the two transmission channels on band 2 are coherent with the two transmission channels on band 1 after switching to band 1. That is, the four transmission channels on the band are completely coherent after the transmission channels are switched.

[0425] After the transmission channel is switched, the order of the four transmission channels on the frequency band 1 is Tx 1_0, Tx 1_1, Tx 1_2, and Tx 1_3, and by default, the maximum transmission power of the four transmission channels on the frequency band 1 after switching satisfies: Tx 1_0 ≥ Tx 1_2 ≥ Tx 1_1 ≥ Tx1_3.

[0426] Table 26

[0427]

[0428] In the setting rules shown in Table 26, the newly added indicator codeword is considered The two transmission channels on band 1 and the two transmission channels on band 2 are coherent, and the two transmission channels on band 2 are incoherent with the two transmission channels on band 1 after switching to band 1. That is, the four transmission channels on band 1 are partially coherent after the transmission channels are switched.

[0429] After the transmission channel is switched, the order of the four transmission channels on band 1 is Tx 1_0, Tx 1_1, Tx 1_2, and Tx 1_3. By default, after the switching, Tx 1_0 and Tx 1_2 on band 1 are coherent, Tx 1_1 and Tx 1_3 are coherent, and the maximum transmission power of the four transmission channels satisfies: Tx 1_0 ≥ Tx 1_2, Tx 1_1 ≥ Tx 1_3.

[0430] Table 27

[0431]

[0432] In the setting rules shown in Table 27, the newly added indicator codeword is considered The two transmission channels on band 1 are coherent and the two transmission channels on band 2 are incoherent (or the two transmission channels on band 1 are incoherent and the two transmission channels on band 2 are coherent). After the two transmission channels on band 2 are switched to band 1, they are incoherent with the two transmission channels on band 1. That is, after the transmission channels are switched, only two of the four transmission channels on band 1 are coherent.

[0433] After the transmission channel is switched, the order of the four transmission channels on band 1 is Tx 1_0, Tx 1_1, Tx 1_2, and Tx 1_3. By default, after the switching, Tx 1_0 and Tx 1_2 on band 1 are coherent, Tx 1_1 and Tx 1_3 are incoherent, and the maximum transmission power of the four transmission channels satisfies: Tx 1_0 ≥ Tx 1_2, Tx 1_1 ≥ Tx 1_3.

[0434] Finally, it should be noted that Figure 4 The transmission channel switching method shown is only an example and does not constitute a limitation on the transmission channel switching method of the terminal device. The method provided in the embodiment of the present application can be applied to various transmission channel switching methods. For example, the terminal device supports two transmission channels on both frequency band 1 and frequency band 2, wherein the two transmission channels on frequency band 1 can be switched to frequency band 2. For another example, the terminal device supports two transmission channels on frequency band 1, frequency band 2 and frequency band 3, wherein one transmission channel on frequency band 2 and frequency band 3 can be switched to frequency band 1.

[0435] In addition, it should be noted that in the above examples, only the power class (PC) of each frequency band is PC3 for illustration, that is, the maximum total transmit power of the terminal device allowed by each frequency band is 23dBm. However, the method used in the embodiment of the present application is not limited to PC3, and is still applicable when the maximum total transmit power of the terminal device allowed by each frequency band is other values.

[0436] Based on the same technical concept, the present application also provides a communication device, which can be applied to Figure 1A The communication device is used to implement the methods provided in the above embodiments and examples. Figure 7 As shown, the communication device includes a communication unit 701 and a processing unit 702. The communication unit 701 is used to receive and send signals. The physical form of the communication unit 701 can be a transceiver and an antenna.

[0437] In one implementation, the communication device 700 is used in a terminal device or a network device to implement the following Figure 6 The embodiment shown provides a method for determining a full-power transmission codebook subset. The functions of each unit in this implementation manner are introduced below.

[0438] The processing unit 702 is configured to: determine a full-power transmission codebook subset corresponding to a frequency band supported by the terminal device before the antenna port of the terminal device is switched;

[0439] Determine, according to the full-power transmission codebook subsets corresponding to the multiple source frequency bands and the set rules, the full-power transmission codebook subset corresponding to the target frequency band after the antenna port of the terminal device is switched;

[0440] Among them, the multiple source frequency bands are the frequency bands where the multiple target antenna ports are located before the antenna port is switched; the multiple target antenna ports are the antenna ports on the target frequency band after the antenna port is switched; the setting rules are used to indicate the correspondence between the full-power transmission codebook subsets corresponding to the multiple source frequency bands before the antenna port is switched and the full-power transmission codebook subsets corresponding to the target frequency band after the antenna port is switched.

[0441] In one possible design, when the communication device 700 is applied to a network device, the processing unit 702, when determining the full-power transmission codebook subset corresponding to the frequency band supported by the terminal device before the antenna port of the terminal device is switched, is specifically used to:

[0442] The communication unit 701 receives a full-power transmission capability indication from the terminal device, where the full-power transmission capability indication is used to indicate a full-power transmission codebook subset corresponding to a frequency band supported by the terminal device before the antenna port of the terminal device is switched.

[0443] In one possible design, when the communication device 700 is applied to the terminal device, the communication unit 701 is also used to: send a full-power transmission capability indication to a network device, and the full-power transmission capability indication is used to indicate a full-power transmission codebook subset corresponding to the frequency band supported by the terminal device before the antenna port of the terminal device is switched.

[0444] In one possible design, the setting rule is determined based on the coherence capability of the multiple target antenna ports on the target frequency band.

[0445] In one possible design, when the method is applied to a network device, the coherence capabilities of the multiple target antenna ports are determined in the following manner:

[0446] Receiving, through the communication unit 701, a first coherence capability indication from the terminal device, where the first coherence capability indication is used to indicate the coherence capabilities of the multiple target antenna ports; or

[0447] A second coherence capability indication is received from the terminal device through the communication unit 701, wherein the second coherence capability indication is used to indicate the coherence capability of the antenna ports between the multiple source frequency bands before the antenna port of the terminal device is switched; and the coherence capability of the multiple target antenna ports is determined according to the coherence capability of the antenna ports on the multiple source frequency bands and the coherence capability of the antenna ports between the multiple source frequency bands.

[0448] In a first possible implementation manner, the terminal device supports a first frequency band and a second frequency band, and there are two antenna ports on the first frequency band before the antenna port is switched, and there are two antenna ports on the second frequency band before the antenna port is switched; wherein at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; after the antenna port is switched, there are four antenna ports on the third frequency band;

[0449] In the above case, the setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table:

[0450]

[0451] Among them, the full-power transmission codebook subset corresponding to any frequency band is "00" indicating that the full-power transmission codebook subset is empty; G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" indicates all codewords in the uplink precoding codebook; "-" indicates non-existence.

[0452] In a second possible implementation manner, the terminal device supports a first frequency band and a second frequency band, and there are two antenna ports on the first frequency band before the antenna port is switched, and there are two antenna ports on the second frequency band before the antenna port is switched; wherein at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; after the antenna port is switched, there are four antenna ports on the third frequency band;

[0453] In the above case, the setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table:

[0454]

[0455] Among them, the full-power transmission codebook subset corresponding to any frequency band is "00", indicating that the full-power transmission codebook subset is empty; G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full-power transmission codebook subset is the union of the two TPMI groups before and after "+"; "-" means it does not exist.

[0456] In a third possible implementation manner, the terminal device supports a first frequency band and a second frequency band, and there are two antenna ports on the first frequency band before the antenna port is switched, and there are two antenna ports on the second frequency band before the antenna port is switched; wherein at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; after the antenna port is switched, there are four antenna ports on the third frequency band;

[0457] In the above case, the setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table:

[0458]

[0459]

[0460] Among them, the full-power transmission codebook subset corresponding to any frequency band is "00", indicating that the full-power transmission codebook subset is empty; G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full-power transmission codebook subset is the union of the two TPMI groups before and after "+"; "-" means it does not exist.

[0461] In a fourth possible implementation manner, the terminal device supports a first frequency band and a second frequency band, and there are two antenna ports on the first frequency band before the antenna port is switched, and there are two antenna ports on the second frequency band before the antenna port is switched; wherein at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; after the antenna port is switched, there are four antenna ports on the third frequency band;

[0462] In the above case, the setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table:

[0463]

[0464] Among them, the full-power transmission codebook subset corresponding to any frequency band is "00", indicating that the full-power transmission codebook subset is empty; G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full-power transmission codebook subset is the union of the two TPMI groups before and after "+"; "-" means it does not exist.

[0465] In a fifth possible implementation manner, the terminal device supports a first frequency band and a second frequency band, and before the antenna port is switched, there are two antenna ports on the first frequency band, and before the antenna port is switched, there are two antenna ports on the second frequency band; wherein, at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; after the antenna port is switched, there are four antenna ports on the third frequency band;

[0466] In the above case, the setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table:

[0467]

[0468] Among them, G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full power transmit codebook subset is the union of the two TPMI groups before and after "+";

[0469] Any codeword contained in the full power transmission codebook subset is an indication codeword; when the full-power transmission codebook subset corresponding to any frequency band contains the indication codeword, it indicates that the maximum transmission power of each antenna port on the frequency band is greater than or equal to a preset value; when the full-power transmission codebook subset corresponding to any frequency band does not contain the indication codeword, it indicates that there is at least one antenna port on the frequency band with a maximum transmission power less than the preset value.

[0470] Optionally, based on the first and fifth possible implementation methods, the two antenna ports on the first frequency band are incoherent, the two antenna ports on the second frequency band are incoherent, and after the antenna ports of the terminal device are switched, the four antenna ports on the third frequency band are incoherent.

[0471] Optionally, based on the first and fifth possible implementation methods, after the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of the four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is assumed that after the antenna port of the terminal device is switched, the maximum transmit power of the first antenna port in the third frequency band is not less than the maximum transmit power of the third antenna port, the maximum transmit power of the third antenna port is not less than the maximum transmit power of the second antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

[0472] In a sixth possible implementation manner, the terminal device supports a first frequency band and a second frequency band, and before the antenna port is switched, there are two antenna ports on the first frequency band, and before the antenna port is switched, there are two antenna ports on the second frequency band; wherein, at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; after the antenna port is switched, there are four antenna ports on the third frequency band;

[0473] In the above case, the setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table:

[0474]

[0475]

[0476] Among them, G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full power transmit codebook subset is the union of the two TPMI groups before and after "+";

[0477] Any codeword contained in the full power transmission codebook subset is an indication codeword; when the full-power transmission codebook subset corresponding to any frequency band contains the indication codeword, it indicates that the maximum transmission power of each antenna port on the frequency band is greater than or equal to a preset value; when the full-power transmission codebook subset corresponding to any frequency band does not contain the indication codeword, it indicates that there is at least one antenna port on the frequency band with a maximum transmission power less than the preset value.

[0478] Optionally, based on the second and sixth possible implementation methods, two antenna ports on the first frequency band are coherent, two antenna ports on the second frequency band are coherent, and after the antenna ports of the terminal device are switched, the four antenna ports on the third frequency band are completely coherent.

[0479] Optionally, based on the second and sixth possible implementation methods, after the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of the four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is defaulted that after the antenna port of the terminal device is switched, the maximum transmit power of the first antenna port in the third frequency band is not less than the maximum transmit power of the third antenna port, the maximum transmit power of the third antenna port is not less than the maximum transmit power of the second antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

[0480] In a seventh possible implementation manner, the terminal device supports a first frequency band and a second frequency band, and before the antenna port is switched, there are two antenna ports on the first frequency band, and before the antenna port is switched, there are two antenna ports on the second frequency band; wherein, at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; after the antenna port is switched, there are four antenna ports on the third frequency band;

[0481] In the above case, the setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table:

[0482]

[0483]

[0484] Among them, G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full power transmit codebook subset is the union of the two TPMI groups before and after "+";

[0485] Any codeword contained in the full power transmission codebook subset is an indication codeword; when the full-power transmission codebook subset corresponding to any frequency band contains the indication codeword, it indicates that the maximum transmission power of each antenna port on the frequency band is greater than or equal to a preset value; when the full-power transmission codebook subset corresponding to any frequency band does not contain the indication codeword, it indicates that there is at least one antenna port on the frequency band with a maximum transmission power less than the preset value.

[0486] Optionally, based on the third and seventh possible implementation methods, two antenna ports on the first frequency band are coherent, two antenna ports on the second frequency band are coherent, and after the antenna ports of the terminal device are switched, the four antenna ports on the third frequency band are partially coherent.

[0487] Optionally, based on the third and seventh possible implementation methods, after the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of the four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is assumed that after the antenna port of the terminal device is switched, the first antenna port and the third antenna port on the third frequency band are coherent, the second antenna port and the fourth antenna port are coherent, the maximum transmit power of the first antenna port is not less than the maximum transmit power of the third antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

[0488] In an eighth possible implementation manner, the terminal device supports a first frequency band and a second frequency band, and before the antenna port is switched, there are two antenna ports on the first frequency band, and before the antenna port is switched, there are two antenna ports on the second frequency band; wherein, at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; after the antenna port is switched, there are four antenna ports on the third frequency band;

[0489] In the above case, the setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table:

[0490]

[0491] Among them, G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full power transmit codebook subset is the union of the two TPMI groups before and after "+";

[0492] Any codeword contained in the full power transmission codebook subset is an indication codeword; when the full-power transmission codebook subset corresponding to any frequency band contains the indication codeword, it indicates that the maximum transmission power of each antenna port on the frequency band is greater than or equal to a preset value; when the full-power transmission codebook subset corresponding to any frequency band does not contain the indication codeword, it indicates that there is at least one antenna port on the frequency band with a maximum transmission power less than the preset value.

[0493] Optionally, based on the fourth and eighth possible implementation methods, two antenna ports on the first frequency band are coherent and two antenna ports on the second frequency band are incoherent, or two antenna ports on the first frequency band are incoherent and two antenna ports on the second frequency band are coherent; after the antenna ports of the terminal device are switched, only two of the four antenna ports on the third frequency band are coherent.

[0494] Optionally, based on the fourth and eighth possible implementation methods, after the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of the four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is assumed that after the antenna port of the terminal device is switched, the first antenna port and the third antenna port on the third frequency band are coherent, the second antenna port and the fourth antenna port are incoherent, the maximum transmit power of the first antenna port is not less than the maximum transmit power of the third antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

[0495] In a possible design, when the communication device 700 is applied to a network device, the processing unit 702 is further used to:

[0496] determining, according to the full-power transmit codebook subset corresponding to the target frequency band, the maximum transmit powers of the multiple target antenna ports on the target frequency band; or

[0497] The communication unit 701 receives transmission power indication information from the terminal device, where the transmission power indication information is used to indicate the maximum transmission power of the multiple target antenna ports on the target frequency band after the antenna ports of the terminal device are switched.

[0498] In one possible design, when the multiple source frequency bands include a first frequency band and a second frequency band, the processing unit 702, when receiving a full power transmission capability indication from the terminal device through the communication unit 701, includes:

[0499] Receiving a first full-power transmission capability indication from the terminal device through the communication unit 701; and receiving a second full-power transmission capability indication from the terminal device; wherein the first full-power transmission capability indication includes first indication information and second indication information, and the second full-power transmission capability indication includes third indication information and fourth indication information; the first indication information is used to indicate a full-power transmission codebook subset corresponding to the first frequency band, and the second indication information is used to indicate a value distribution of the maximum transmission power of the antenna port on the first frequency band; the third indication information is used to indicate a full-power transmission codebook subset corresponding to the second frequency band, and the fourth indication information is used to indicate a value distribution of the maximum transmission power of the antenna port on the second frequency band;

[0500] The processing unit 702 is further configured to:

[0501] Determine the maximum transmit power of the multiple target antenna ports on the target frequency band according to the full-power transmit codebook subset corresponding to the first frequency band indicated by the first indication information, the value distribution indicated by the second indication information, the full-power transmit codebook subset corresponding to the second frequency band indicated by the third indication information, and the value distribution indicated by the fourth indication information.

[0502] In one implementation, the communication device 700 is used in a network device to implement the following Figure 5 The embodiment shown provides a method for determining a full-power transmission codebook subset. The functions of each unit in this implementation manner are introduced below.

[0503] The communication unit 701 is used to receive a full-power transmission capability indication from a terminal device, where the full-power transmission capability indication is used to indicate a full-power transmission codebook subset corresponding to a target frequency band after an antenna port of the terminal device is switched;

[0504] The processing unit 702 is used to determine, according to the full-power transmission capability indication, a full-power transmission codebook subset corresponding to the target frequency band after the antenna port of the terminal device is switched;

[0505] Among them, the target frequency band is the frequency band in which the corresponding antenna port of the terminal device changes before and after the antenna port is switched.

[0506] In one implementation, the communication device 700 is used in a terminal device to implement the following Figure 5 The embodiment shown provides a method for determining a full-power transmission codebook subset. The functions of each unit in this implementation manner are introduced below.

[0507] The processing unit 702 is used to determine a full-power transmission codebook subset corresponding to the target frequency band after the antenna port is switched;

[0508] The communication unit 701 is used to send a full-power transmission capability indication to the network device, where the full-power transmission capability indication is used to indicate a full-power transmission codebook subset corresponding to the target frequency band after the antenna port of the terminal device is switched;

[0509] Among them, the target frequency band is the frequency band in which the corresponding antenna port of the terminal device changes before and after the antenna port is switched.

[0510] In one implementation, the communication device 700 is used in a network device to implement the following Figure 3 The embodiment shown provides a method for determining the maximum transmit power of an antenna port. The functions of each unit in this implementation manner are introduced below.

[0511] The communication unit 701 is used to receive a full-power transmission capability indication from a terminal device, where the full-power transmission capability indication includes first indication information and second indication information, where the first indication information is used to indicate a full-power transmission codebook subset corresponding to a first frequency band, and the second indication information is used to indicate a value distribution of a maximum transmission power of an antenna port on the first frequency band;

[0512] The processing unit 702 is configured to determine the maximum transmit power of the antenna port on the first frequency band according to the full-power transmit codebook subset and the value distribution.

[0513] In one possible design, the second indication information is used to indicate that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to a first preset value; or

[0514] When the value of the second indication information is the first value, the second indication information indicates that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to the first preset value; when the value of the second indication information is the second value, the second indication information indicates that the maximum transmit power of at least one antenna port on the first frequency band is less than the first preset value;

[0515] The first preset value is smaller than the maximum total transmit power P of the terminal device allowed by the first frequency band.

[0516] In one possible design, the terminal device has two antenna ports on the first frequency band;

[0517] When the full power transmission codebook subset indicated by the first indication information is When the second indication information indicates that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to the first preset value, the maximum transmit powers of the two antenna ports on the first frequency band are P and P respectively; or

[0518] When the full power transmission codebook subset indicated by the first indication information is or When the second indication information indicates that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to the first preset value, the maximum transmit powers of the two antenna ports on the first frequency band are P and the first preset value respectively; or

[0519] When the full power transmission codebook subset indicated by the first indication information is or When the second indication information indicates that the maximum transmit power of at least one antenna port on the first frequency band is less than the first preset value, the maximum transmit powers of the two antenna ports on the first frequency band are P and the second preset value, respectively; wherein the second preset value is less than the first preset value; or

[0520] When the full-power transmission codebook subset indicated by the first indication information is empty, and the second indication information indicates that the maximum transmission power of all antenna ports on the first frequency band is greater than or equal to the first preset value, the maximum transmission power of the two antenna ports on the first frequency band are the first preset value and the first preset value, respectively.

[0521] In one possible design, when the second indication information indicates that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to the first preset value, the second indication information is used to indicate the indication codeword

[0522] In one possible design, the processing unit 702 is further configured to:

[0523] After determining the maximum transmission power of the antenna port on the first frequency band, receiving a switching adjustment value of the target antenna port from the terminal device through the communication unit 701; wherein the target antenna port is an antenna port that can be switched to other frequency bands on the first frequency band, and the switching adjustment value is an adjustment value of the maximum transmission power after the target antenna port is switched to the other frequency band; based on the maximum transmission power of the target antenna port on the target frequency band and the switching adjustment value of the target antenna port, determine the maximum transmission power of the target antenna port on the other frequency band after the antenna port of the terminal device is switched; or

[0524] The communication unit 701 receives transmission power indication information from the terminal device, where the transmission power indication information is used to indicate the maximum transmission power of the antenna port of the terminal device in the second frequency band after the antenna port is switched.

[0525] In one implementation, the communication device 700 is used in a terminal device to implement the following Figure 3 The embodiment shown provides a method for determining the maximum transmit power of an antenna port. The functions of each unit in this implementation manner are introduced below.

[0526] The processing unit 702 is configured to determine a full-power transmit codebook set corresponding to a first frequency band and a maximum transmit power of an antenna port on the first frequency band;

[0527] The communication unit 701 is used to send a full-power transmission capability indication to a network device, and the full-power transmission capability indication includes first indication information and second indication information. The first indication information is used to indicate a full-power transmission codebook subset corresponding to the first frequency band, and the second indication information is used to indicate the value distribution of the maximum transmission power of the antenna port on the first frequency band.

[0528] In one possible design, the second indication information is used to indicate that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to a first preset value; or

[0529] When the value of the second indication information is the first value, the second indication information indicates that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to the first preset value; when the value of the second indication information is the second value, the second indication information indicates that the maximum transmit power of at least one antenna port on the first frequency band is less than the first preset value;

[0530] The first preset value is smaller than the maximum total transmit power P of the terminal device allowed by the first frequency band.

[0531] In one possible design, the terminal device has two antenna ports on the first frequency band;

[0532] When the full power transmission codebook subset indicated by the first indication information is When the maximum transmit powers of the two antenna ports on the first frequency band are P and P respectively, the second indication information indicates that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to the first preset value; or

[0533] When the full power transmission codebook subset indicated by the first indication information is or and when the maximum transmit powers of the two antenna ports on the first frequency band are P and the first preset value respectively, the second indication information indicates that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to the first preset value; or

[0534] When the full power transmission codebook subset indicated by the first indication information is or When the maximum transmit powers of the two antenna ports on the first frequency band are P and the second preset value respectively, the second indication information indicates that the maximum transmit power of at least one antenna port on the first frequency band is less than the first preset value; wherein the second preset value is less than the first preset value; or

[0535] When the full-power transmission codebook subset indicated by the first indication information is empty, and the maximum transmission powers of the two antenna ports on the first frequency band are respectively the first preset value and the first preset value, the second indication information indicates that the maximum transmission power of all antenna ports on the first frequency band is greater than or equal to the first preset value.

[0536] In one possible design, when the second indication information indicates that the maximum transmit power of all antenna ports on the first frequency band is greater than or equal to the first preset value, the second indication information is used to indicate the indication codeword

[0537] In one possible design, the processing unit 702 is further configured to:

[0538] Determine a switching adjustment value of a target antenna port; wherein the target antenna port is an antenna port that can be switched to other frequency bands on the target frequency band; the switching adjustment value is an adjustment value of the maximum transmit power after the target antenna port is switched to the other frequency band; send the switching adjustment value of the target antenna port to the network device through the communication unit 701; or

[0539] The communication unit 701 sends transmission power indication information to the network device, where the transmission power indication information is used to indicate the maximum transmission power of the antenna port of the terminal device in the second frequency band after the antenna port is switched.

[0540] In one implementation, the communication device 700 is used in a network device to implement the following Figure 2 The embodiment shown provides a method for determining the maximum transmit power of an antenna port. The functions of each unit in this implementation manner are introduced below.

[0541] The communication unit 701 is used to receive transmit power indication information from the terminal device, where the transmit power indication information is used to indicate the maximum transmit power of the antenna port on the first frequency band supported by the terminal device;

[0542] The processing unit 702 is used to determine the maximum transmission power of the antenna port of the terminal device in the first frequency band according to the transmission power indication information.

[0543] In one implementation, the communication device 700 is used in a terminal device to implement the following Figure 2 The embodiment shown provides a method for determining the maximum transmit power of an antenna port. The functions of each unit in this implementation manner are introduced below.

[0544] The processing unit 702 is configured to determine the maximum transmit power of an antenna port on a supported first frequency band;

[0545] The communication unit 701 is used to send transmit power indication information to the network device, where the transmit power indication information is used to indicate the maximum transmit power of the antenna port in the first frequency band.

[0546] It should be noted that the division of modules in the embodiments of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into a processing unit, or may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0547] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) or a processor (processor) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0548] Based on the above embodiments, the present application also provides a communication device, which can be applied to Figure 1A In the communication system shown in FIG. 1 , the method in the above embodiment can be implemented, and the communication device 700 has the functions provided in the above embodiment. Figure 8 As shown, the communication device 800 includes: a transceiver 801 and a processor 802. Optionally, the communication device 800 also includes a memory 803. The transceiver 801, the processor 802 and the memory 803 are interconnected.

[0549] Optionally, the transceiver 801, the processor 802, and the memory 803 are interconnected via a bus 804. The bus 804 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 8 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0550] The transceiver 801 is used to receive and send signals to achieve communication with other devices in the communication system. Optionally, the transceiver 801 includes at least one transmission channel for sending signals and at least one reception channel for receiving signals. Exemplarily, any transmission channel structure can be as follows: Figure 1B As shown in the transmission channel of the wireless transmission system shown in FIG. 1 , of course, the transmission channel in the communication device of this embodiment can be Figure 1BThe launch channel described in the specification may include more or fewer components, or may combine some components, or split some components, or may be deployed with different components.

[0551] The processor 802 is used to implement the methods provided in the above embodiments. The specific process can refer to the description in the above embodiments and will not be repeated here.

[0552] The processor 802 may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and a NP, etc. The processor 802 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or any combination thereof. When implementing the above functions, the processor 802 may be implemented by hardware, or may be implemented by executing corresponding software through hardware.

[0553] The memory 803 is used to store program instructions, etc. Specifically, the program instructions may include program codes, and the program codes include computer operation instructions. The memory 803 may include random access memory (RAM), and may also include non-volatile memory (non-volatile memory), such as at least one disk storage. The processor 802 executes the program instructions stored in the memory 803 to implement the above functions, thereby implementing the method provided in the above embodiment.

[0554] Based on the above embodiments, the embodiments of the present application further provide a computer program, which, when executed on a computer, enables the computer to execute the methods provided in the above embodiments.

[0555] Based on the above embodiments, the embodiments of the present application further provide a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a computer, the computer executes the method provided in the above embodiments.

[0556] The storage medium may be any available medium that can be accessed by a computer. For example, but not limited to, a computer-readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer.

[0557] Based on the above embodiments, an embodiment of the present application further provides a chip, which is used to read a computer program stored in a memory to implement the method provided in the above embodiments.

[0558] Based on the above embodiments, the embodiments of the present application provide a chip system, which includes a processor for supporting a computer device to implement the functions involved in the communication device in the above embodiments. In a possible design, the chip system also includes a memory, which is used to store the necessary programs and data for the computer device. The chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0559] In summary, the embodiments of the present application provide a method and device for determining a full-power transmission codebook subset. In this method, the terminal device reports to the network device the full-power transmission codebook subset corresponding to the frequency band supported by the terminal device before the transmission channel is switched. The network device or terminal device in the communication system can determine the full-power transmission codebook subset corresponding to the target frequency band after the transmission channel is switched based on the full-power transmission codebook subsets corresponding to multiple source frequency bands and the set rules. Among them, the multiple source frequency bands are the frequency bands where the multiple target antenna ports are located before the antenna port is switched, and the multiple target antenna ports are the antenna ports on the target frequency band after the antenna port is switched. Through this method, the network device or terminal device can determine the full-power transmission codebook subset of the terminal device after the transmission channel is switched.

[0560] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0561] The present application is described with reference to the flowchart and / or block diagram of the method, device (system), and computer program product according to the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the process and / or box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the function specified in one process or multiple processes in the flowchart and / or one box or multiple boxes in the block diagram.

[0562] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0563] These computer program instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0564] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for determining a full-power transmission codebook subset, characterized in that: include: Determine a full-power transmission codebook subset corresponding to a frequency band supported by the terminal device before the antenna port of the terminal device is switched; Determine, according to the full-power transmission codebook subsets corresponding to the multiple source frequency bands and the set rules, the full-power transmission codebook subset corresponding to the target frequency band after the antenna port of the terminal device is switched; The multiple source frequency bands are the frequency bands where the multiple target antenna ports are located before the antenna port is switched; The multiple target antenna ports are antenna ports on the target frequency band after the antenna port is switched; the setting rule is used to indicate the correspondence between the full-power transmission codebook subsets corresponding to the multiple source frequency bands before the antenna port is switched and the full-power transmission codebook subsets corresponding to the target frequency band after the antenna port is switched.

2. The method according to claim 1, characterized in that When the method is applied to a network device, determining a full-power transmission codebook subset corresponding to a frequency band supported by the terminal device before the antenna port of the terminal device is switched includes: A full-power transmission capability indication is received from the terminal device, where the full-power transmission capability indication is used to indicate a full-power transmission codebook subset corresponding to a frequency band supported by the terminal device before the antenna port of the terminal device is switched.

3. The method according to claim 1, characterized in that When the method is applied to the terminal device, the method further includes: A full-power transmission capability indication is sent to a network device, where the full-power transmission capability indication is used to indicate a full-power transmission codebook subset corresponding to a frequency band supported by the terminal device before the antenna port of the terminal device is switched.

4. The method according to claim 1, characterized in that The setting rule is determined according to the coherence capabilities of the multiple target antenna ports on the target frequency band.

5. The method according to claim 4, characterized in that When the method is applied to a network device, the coherence capabilities of the multiple target antenna ports are determined in the following manner: Receiving a first coherence capability indication from the terminal device, where the first coherence capability indication is used to indicate the coherence capability of the multiple target antenna ports; or Receiving a second coherence capability indication from the terminal device, where the second coherence capability indication is used to indicate the coherence capability of the antenna port between the multiple source frequency bands before the antenna port of the terminal device is switched; The coherence capabilities of the multiple target antenna ports are determined according to the coherence capabilities of the antenna ports on the multiple source frequency bands and the coherence capabilities of the antenna ports between the multiple source frequency bands.

6. The method according to any one of claims 1 to 5, characterized in that: The terminal device supports a first frequency band and a second frequency band, and has two antenna ports on the first frequency band before antenna port switching, and has two antenna ports on the second frequency band before antenna port switching; wherein at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; and after antenna port switching, there are four antenna ports on the third frequency band; The setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table: Among them, the full-power transmission codebook subset corresponding to any frequency band is "00" indicating that the full-power transmission codebook subset is empty; G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" indicates all codewords in the uplink precoding codebook; "-" indicates non-existence.

7. The method according to claim 6, characterized in that The two antenna ports on the first frequency band are incoherent, the two antenna ports on the second frequency band are incoherent, and after the antenna ports of the terminal device are switched, the four antenna ports on the third frequency band are incoherent.

8. The method according to claim 6, characterized in that After the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of a four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is assumed that after the antenna port of the terminal device is switched, the maximum transmit power of the first antenna port in the third frequency band is not less than the maximum transmit power of the third antenna port, the maximum transmit power of the third antenna port is not less than the maximum transmit power of the second antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

9. The method according to any one of claims 1 to 5, characterized in that: The terminal device supports a first frequency band and a second frequency band, and has two antenna ports on the first frequency band before antenna port switching, and has two antenna ports on the second frequency band before antenna port switching; wherein at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; and after antenna port switching, there are four antenna ports on the third frequency band; The setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table: Among them, the full-power transmission codebook subset corresponding to any frequency band is "00", indicating that the full-power transmission codebook subset is empty; G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full-power transmission codebook subset is the union of the two TPMI groups before and after "+"; "-" means it does not exist.

10. The method according to claim 9, characterized in that The two antenna ports on the first frequency band are coherent, the two antenna ports on the second frequency band are coherent, and after the antenna ports of the terminal device are switched, the four antenna ports on the third frequency band are completely coherent.

11. The method according to claim 9, characterized in that After the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of the four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is assumed that after the antenna port of the terminal device is switched, the maximum transmit power of the first antenna port in the third frequency band is not less than the maximum transmit power of the third antenna port, the maximum transmit power of the third antenna port is not less than the maximum transmit power of the second antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

12. The method according to any one of claims 1 to 5, characterized in that: The terminal device supports a first frequency band and a second frequency band, and has two antenna ports on the first frequency band before antenna port switching, and has two antenna ports on the second frequency band before antenna port switching; wherein at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; and after antenna port switching, there are four antenna ports on the third frequency band; The setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table: Among them, the full-power transmission codebook subset corresponding to any frequency band is "00", indicating that the full-power transmission codebook subset is empty; G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full-power transmission codebook subset is the union of the two TPMI groups before and after "+"; "-" means it does not exist.

13. The method according to claim 12, characterized in that The two antenna ports on the first frequency band are coherent, the two antenna ports on the second frequency band are coherent, and after the antenna ports of the terminal device are switched, the four antenna ports on the third frequency band are partially coherent.

14. The method according to claim 12, characterized in that After the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of the four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is assumed that after the antenna port of the terminal device is switched, the first antenna port and the third antenna port on the third frequency band are coherent, the second antenna port and the fourth antenna port are coherent, the maximum transmit power of the first antenna port is not less than the maximum transmit power of the third antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

15. The method according to any one of claims 1 to 5, characterized in that: The terminal device supports a first frequency band and a second frequency band, and has two antenna ports on the first frequency band before antenna port switching, and has two antenna ports on the second frequency band before antenna port switching; wherein at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; and after antenna port switching, there are four antenna ports on the third frequency band; The setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table: Among them, the full-power transmission codebook subset corresponding to any frequency band is "00", indicating that the full-power transmission codebook subset is empty; G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full-power transmission codebook subset is the union of the two TPMI groups before and after "+"; "-" means it does not exist.

16. The method according to claim 15, characterized in that The two antenna ports on the first frequency band are coherent and the two antenna ports on the second frequency band are incoherent, or the two antenna ports on the first frequency band are incoherent and the two antenna ports on the second frequency band are coherent; after the antenna ports of the terminal device are switched, only two of the four antenna ports on the third frequency band are coherent.

17. The method according to claim 15, characterized in that After the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of the four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is assumed that after the antenna port of the terminal device is switched, the first antenna port and the third antenna port on the third frequency band are coherent, the second antenna port and the fourth antenna port are incoherent, the maximum transmit power of the first antenna port is not less than the maximum transmit power of the third antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

18. The method according to any one of claims 1 to 5, characterized in that: The terminal device supports a first frequency band and a second frequency band, and has two antenna ports on the first frequency band before antenna port switching, and has two antenna ports on the second frequency band before antenna port switching; wherein at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; and after antenna port switching, there are four antenna ports on the third frequency band; The setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table: Among them, G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full power transmit codebook subset is the union of the two TPMI groups before and after "+"; Any codeword contained in the full power transmission codebook subset is an indication codeword; when the full-power transmission codebook subset corresponding to any frequency band contains the indication codeword, it indicates that the maximum transmission power of each antenna port on the frequency band is greater than or equal to a preset value; when the full-power transmission codebook subset corresponding to any frequency band does not contain the indication codeword, it indicates that there is at least one antenna port on the frequency band with a maximum transmission power less than the preset value.

19. The method according to claim 18, characterized in that The two antenna ports on the first frequency band are incoherent, the two antenna ports on the second frequency band are incoherent, and after the antenna ports of the terminal device are switched, the four antenna ports on the third frequency band are incoherent.

20. The method of claim 18, wherein: After the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of a four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is assumed that after the antenna port of the terminal device is switched, the maximum transmit power of the first antenna port in the third frequency band is not less than the maximum transmit power of the third antenna port, the maximum transmit power of the third antenna port is not less than the maximum transmit power of the second antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

21. The method according to any one of claims 1 to 5, characterized in that: The terminal device supports a first frequency band and a second frequency band, and has two antenna ports on the first frequency band before antenna port switching, and has two antenna ports on the second frequency band before antenna port switching; wherein at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; and after antenna port switching, there are four antenna ports on the third frequency band; The setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table: Among them, G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full power transmit codebook subset is the union of the two TPMI groups before and after "+"; Any codeword contained in the full power transmission codebook subset is an indication codeword; when the full-power transmission codebook subset corresponding to any frequency band contains the indication codeword, it indicates that the maximum transmission power of each antenna port on the frequency band is greater than or equal to a preset value; when the full-power transmission codebook subset corresponding to any frequency band does not contain the indication codeword, it indicates that there is at least one antenna port on the frequency band with a maximum transmission power less than the preset value.

22. The method according to claim 21, characterized in that The two antenna ports on the first frequency band are coherent, the two antenna ports on the second frequency band are coherent, and after the antenna ports of the terminal device are switched, the four antenna ports on the third frequency band are completely coherent.

23. The method of claim 21, wherein: After the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of the four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is assumed that after the antenna port of the terminal device is switched, the maximum transmit power of the first antenna port in the third frequency band is not less than the maximum transmit power of the third antenna port, the maximum transmit power of the third antenna port is not less than the maximum transmit power of the second antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

24. The method according to any one of claims 1 to 5, characterized in that The terminal device supports a first frequency band and a second frequency band, and has two antenna ports on the first frequency band before antenna port switching, and has two antenna ports on the second frequency band before antenna port switching; wherein at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; and after antenna port switching, there are four antenna ports on the third frequency band; The setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table: Among them, G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full power transmit codebook subset is the union of the two TPMI groups before and after "+"; Any codeword contained in the full power transmission codebook subset is an indication codeword; when the full-power transmission codebook subset corresponding to any frequency band contains the indication codeword, it indicates that the maximum transmission power of each antenna port on the frequency band is greater than or equal to a preset value; when the full-power transmission codebook subset corresponding to any frequency band does not contain the indication codeword, it indicates that there is at least one antenna port on the frequency band with a maximum transmission power less than the preset value.

25. The method of claim 24, wherein: The two antenna ports on the first frequency band are coherent, the two antenna ports on the second frequency band are coherent, and after the antenna ports of the terminal device are switched, the four antenna ports on the third frequency band are partially coherent.

26. The method of claim 24, wherein: After the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of the four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is assumed that after the antenna port of the terminal device is switched, the first antenna port and the third antenna port on the third frequency band are coherent, the second antenna port and the fourth antenna port are coherent, the maximum transmit power of the first antenna port is not less than the maximum transmit power of the third antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

27. The method according to any one of claims 1 to 5, characterized in that The terminal device supports a first frequency band and a second frequency band, and has two antenna ports on the first frequency band before antenna port switching, and has two antenna ports on the second frequency band before antenna port switching; wherein at least one antenna port on the second frequency band can be switched to a third frequency band, and at least one antenna port on the first frequency band can be switched to the third frequency band; and after antenna port switching, there are four antenna ports on the third frequency band; The setting rules conform to the corresponding relationship between the first column, the second column and the third column in the following table: Among them, G0-G6 represent different transmit precoding matrix indication TPMI groups respectively; "mode0" represents all codewords in the uplink precoding codebook; "+" indicates that the full power transmit codebook subset is the union of the two TPMI groups before and after "+"; Any codeword contained in the full power transmission codebook subset is an indication codeword; when the full-power transmission codebook subset corresponding to any frequency band contains the indication codeword, it indicates that the maximum transmission power of each antenna port on the frequency band is greater than or equal to a preset value; when the full-power transmission codebook subset corresponding to any frequency band does not contain the indication codeword, it indicates that there is at least one antenna port on the frequency band with a maximum transmission power less than the preset value.

28. The method of claim 27, wherein: The two antenna ports on the first frequency band are coherent and the two antenna ports on the second frequency band are incoherent, or the two antenna ports on the first frequency band are incoherent and the two antenna ports on the second frequency band are coherent; after the antenna ports of the terminal device are switched, only two of the four antenna ports on the third frequency band are coherent.

29. The method of claim 27, wherein: After the antenna port of the terminal device is switched, the antenna ports in the third frequency band include a first antenna port, a second antenna port, a third antenna port, and a fourth antenna port, wherein the first antenna port is associated with the first row of the four-port uplink precoding matrix, the second antenna port is associated with the second row of the four-port uplink precoding matrix, the third antenna port is associated with the third row of the four-port uplink precoding matrix, and the fourth antenna port is associated with the fourth row of the four-port uplink precoding matrix; it is assumed that after the antenna port of the terminal device is switched, the first antenna port and the third antenna port on the third frequency band are coherent, the second antenna port and the fourth antenna port are incoherent, the maximum transmit power of the first antenna port is not less than the maximum transmit power of the third antenna port, and the maximum transmit power of the second antenna port is not less than the maximum transmit power of the fourth antenna port.

30. The method of any one of claims 1-5, 7, 8, 10, 11, 13, 14, 16, 17, 19, 20, 22, 23, 25, 26, 28 and 29, wherein: When the method is applied to a network device, the method further includes: determining, according to the full-power transmit codebook subset corresponding to the target frequency band, the maximum transmit powers of the multiple target antenna ports on the target frequency band; or Receive transmission power indication information from the terminal device, where the transmission power indication information is used to indicate the maximum transmission power of the multiple target antenna ports on the target frequency band after the antenna port of the terminal device is switched.

31. The method of claim 2, wherein: When the multiple source frequency bands include a first frequency band and a second frequency band, receiving a full power transmission capability indication from the terminal device includes: Receiving a first full-power transmission capability indication from the terminal device; and receiving a second full-power transmission capability indication from the terminal device; wherein the first full-power transmission capability indication includes first indication information and second indication information, and the second full-power transmission capability indication includes third indication information and fourth indication information; the first indication information is used to indicate a full-power transmission codebook subset corresponding to the first frequency band, and the second indication information is used to indicate a value distribution of the maximum transmission power of the antenna port on the first frequency band; the third indication information is used to indicate a full-power transmission codebook subset corresponding to the second frequency band, and the fourth indication information is used to indicate a value distribution of the maximum transmission power of the antenna port on the second frequency band; The method further comprises: Determine the maximum transmit power of the multiple target antenna ports on the target frequency band according to the full-power transmit codebook subset corresponding to the first frequency band indicated by the first indication information, the value distribution indicated by the second indication information, the full-power transmit codebook subset corresponding to the second frequency band indicated by the third indication information, and the value distribution indicated by the fourth indication information.

32. A network device, characterized in that: include: transceiver, used to receive and send signals; Memory, used to store program instructions and data; A processor is used to read program instructions and data in the memory, and implement the method described in any one of claims 1, 2 and 4-31 through the transceiver.

33. A terminal device, characterized in that: include: transceiver, used to receive and send signals; Memory, used to store program instructions and data; A processor, configured to read program instructions and data in the memory, and implement the method of any one of claims 1, 3, 4, 6-29 and 31 through the transceiver.

34. A communication system, characterized in that: include: The network device as claimed in claim 32 and the terminal device as claimed in claim 33.

35. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is run on a computer, the computer executes the method according to any one of claims 1 to 31.

36. A chip, characterized in that: The chip is coupled to a memory, and the chip reads a computer program stored in the memory to execute the method according to any one of claims 1 to 31.

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