Frequency domain component reporting method and apparatus

Abstract

The present application relates to the field of wireless communication technology, and provides a frequency domain component reporting method and apparatus for reducing feedback overhead of the indication of the frequency domain component. v determine frequency domain components, where M v The frequency domain components are a subset of the N candidate frequency domain components, v M is a positive integer. The terminal device transmits first indication information, where the first indication information is v the first indication information indicates frequency domain components, [0010] TIFF2024538618000048.tif occupies 9150 bits, N is M v is a super positive integer.

Description

[Technical Field]

[0001] The present application relates to the field of wireless communication technologies, and in particular to a frequency domain component reporting method and apparatus. [Background technology]

[0003] In a frequency division duplex (FDD) system, some information has reciprocity between the uplink channel and the downlink channel. Therefore, the terminal device may feed back non-reciprocity information, such as index information of the frequency domain component selected by the terminal device, to the radio access network device. For downlink data transmission, the radio access network device may determine a precoding matrix corresponding to the downlink data transmission using the non-reciprocity information between the uplink channel and the downlink channel and the reciprocity information between the uplink channel and the downlink channel.

[0004] Currently, when feeding back the indication information of the frequency domain components, the terminal device selects M from N consecutive frequency domain components. v Select vectors,

[0005]

number

[0006] bits are used to indicate selected frequency domain components to the access network device. For example, M vWhen N=2 and N=4, there are a total of six possible selection schemes, and 3 bits of information are required for indication by the terminal device. However, in multiple frequency domain component selection schemes, the radio access network device may determine precoding matrices with the same coding effect. Therefore, when the terminal device indicates each frequency domain component selection scheme, there is unnecessary feedback overhead of the indication information of the frequency domain component. Summary of the Invention

[0007] The present application provides a frequency domain component reporting method and apparatus to reduce the feedback overhead of frequency domain component indication.

[0008] According to the first aspect, the following process is performed: v A frequency domain component reporting method is provided, which includes the process of obtaining M frequency domain components. v The frequency domain components are a subset of the N candidate frequency domain components, and M v is a positive integer, and N is M v For example, the terminal device selects M from N candidate frequency domain components. v Optionally, the radio access network device may select N frequency domain components. The N candidate frequency domain components may be N consecutive candidate frequency domain components, in other words, any two adjacent frequency domain components among the N candidate frequency domain components have a constant phase offset. Optionally, the radio access network device may select M number of reported frequency domain components. v may be indicated to the terminal device.

[0009] The terminal device transmits first indication information. The first indication information is M v the first indication information indicates frequency domain components,

[0010]

number

[0011] bits, n is M v is a positive integer less than . In this way, the terminal device can represent the frequency domain components using fewer bits, thereby reducing the feedback overhead.

[0012]

number

[0013] is selected from (Nn) values ​​(M v −n) values ​​are selected, where (Nn) may be (Nn) frequency domain components or (Nn) types of frequency domain component sets.

[0014] In this method, M v Considering that M different frequency domain components may enable a radio access network device to determine a precoding matrix with the same coding effect, v The frequency domain components can be represented using the same bit value, thereby reducing the feedback overhead of the frequency domain components.

[0015] For example, M v n frequency domain components among the frequency domain components may be reported by default, and specifically, n may be the number of frequency domain components selected by default from the N candidate frequency domain components. For example, one frequency domain component may be selected to report by default, n is 1, and the first indication information is

[0016]

number

[0017] The frequency domain component selected by default may be the frequency domain component at the start position of the N candidate frequency domain components, the frequency domain component at the end position, or a frequency domain component with a specific value, etc. The n frequency domain components selected by default do not need to be indicated by additional bits, thereby reducing the feedback overhead of the frequency domain components. Alternatively, the terminal device may select M v The frequency domain component set in which the frequency domain component is located is reported as it is, so that the overhead of occupied bits and the feedback overhead of the frequency domain component can be reduced.

[0018] In a possible design, M v is 1 and N is 1 or 2.

[0019] In a possible design, M v is 2 and N is one of 2, 3, 4, or 5.

[0020] In a possible design, the N candidate frequency-domain components include a plurality of types of frequency-domain component sets, where a frequency-domain component subset in each type of frequency-domain component set is equivalent in the reconstruction of the precoding matrix by the radio access network device, and each frequency-domain component subset is M v By classifying the candidate frequency domain components, the overhead of indicating the frequency domain components can be further reduced.

[0021] In this design, different frequency-domain component subsets are equivalent in the reconstruction of the precoding matrix by the radio access network device, i.e., the radio access network device obtains a precoding matrix with the same coding effect by reconstructing different frequency-domain component subsets.

[0022] In a possible design, when N is 2, the terminal device may directly convert the N candidate frequency-domain components into M vIt may also be used as the frequency domain components M v When M = N, the terminal device selects all N candidate frequency domain components, and the terminal device v M selected frequency domain components may not be reported. v When =N, the radio access network device may assume by default that the terminal device selects all N frequency domain components.

[0023] In a possible design, when N is 3, the following scheme may be used for the indication:

[0024] The first indication information indicates two frequency domain components using one bit, one of which is the frequency domain component at the start position or the end position of the N candidate frequency domain components.

[0025] Alternatively, the first indication information indicates two frequency domain components using one bit, one of which is a frequency domain component of a specified value.

[0026] Alternatively, the first indication information indicates each type of frequency domain component set using one bit.

[0027] In this design, M v When is 2 and N is 3, M v One frequency domain component of the frequency domain components may be reported by default and the other may be indicated using one bit, or the candidate frequency domain components may be split and combined into two types of frequency domain component sets, and the two types of frequency domain component sets may be indicated using one bit, allowing the feedback messages of the frequency domain components to be reduced.

[0028] In a possible design, when N is 4 or 5, the following scheme may be used for indication:

[0029] The first indication information indicates two frequency domain components using two bits, one of which is a frequency domain component at a start position or an end position among the N candidate frequency domain components.

[0030] Alternatively, the first indication information indicates two frequency domain components using two bits, one of which is a frequency domain component of a specified value.

[0031] Alternatively, the first indication information indicates each type of frequency domain component set using two bits.

[0032] In this design, M v When is 2 and N is 4 or 5, M v One frequency domain component of the frequency domain components may be reported by default and the other may be indicated using two bits, or the candidate frequency domain components may be split and combined into three or four types of frequency domain component sets, and the three or four types of frequency domain component sets may be indicated using one bit, allowing the feedback messages of the frequency domain components to be reduced.

[0033] M V When M is greater than 2, the first indication information is expressed as M using more bits (for example, 1 bit or more than 2 bits). v The frequency domain components may be represented as .times. ...

[0034] In a possible design, the first indication information is carried in precoding matrix indication information PMI.

[0035] Optionally, the precoding matrix indication information is carried in uplink control information UCI, which is used by the terminal device to feed back downlink channel state information.

[0036] In a possible design, the terminal device may be v The terminal device may transmit the strongest non-zero coefficient among the weighting coefficients corresponding to the frequency domain components. The priority corresponding to the strongest non-zero coefficient is the highest. In this design, the terminal device may preferentially report the strongest non-zero coefficient so that the strongest non-zero coefficient has the highest priority.

[0037] Optionally, the strongest non-zero coefficients may be conveyed using uplink control information.

[0038] A possible design is where the terminal device is v Before obtaining the frequency domain components, the terminal device may further report capability information of the terminal device. The capability information of the terminal device may include codebook combinations supported by the terminal device, and the codebook combinations may include: v The terminal device may further receive second indication information. The second indication information may be used to determine the value of M v Indicates the value of

[0039] The radio access network device performs M based on the codebook combinations supported by the terminal device. v Determine the value of

[0040] In a possible design, the capability information of the terminal device is provided by the M v and the maximum value of M indicated by the second indication information. v The value of M v is less than or equal to the maximum value of

[0041] In a possible design, the codebook combination is type1SP-FeType2M v 1-null, type1SP-FeType2M v 2-null, type1SP-FeType2-null, type1SP-eType2R1-FeType2Mv 1. Type 1 SP-e Type 2 R2-Fe Type 2 M v 1. Type 1 SP-e Type 2 R1-Fe Type 2 M v 2. Type 1 SP-e Type 2 R2-Fe Type 2 M v 2, type1SP-eType2R1-FeType2, type1SP-eType2R2-FeType2, type1MP-FeType2M v 1-null, type1MP-FeType2M v 2-null, type1MP-FeType2-null, type1MP-eType2R1-FeType2M v 1. Type1MP-eType2R2-FeType2M v 1. Type1MP-eType2R1-FeType2M v 2. Type1MP-eType2R2-FeType2M v 2, type1MP-eType2R1-FeType2, or type1MP-eType2R2-FeType2. In this design, a terminal device may support more codebook types.

[0042] In a possible scheme, the second indication information indicates the selected codebook type. v For example, the second indication information indicates the codebook type FeType2M v 1 indicates the M supported by the terminal device in the FeType2 type codebook. v In another example, the second indication information indicates that the codebook type FeType2M v 2 indicates the M supported by the terminal device in the FeType2 type codebook. v In another example, the second indication information indicates that the codebook type is FeType2, and indicates that the terminal uses M in the codebook of FeType2 type. v This indicates that all possible values ​​of are supported by default.

[0043] According to a second aspect, there is provided a frequency domain component reporting method, including the following process: a radio access network device receives first indication information. The first indication information is M v denote the frequency domain components, and M v The frequency domain components are a subset of the N candidate frequency domain components, and M v is a positive integer, and the first indication information is

[0044]

number

[0045] bits, N is M v n is a positive integer greater than or equal to M v is a positive integer less than

[0046] The radio access network device is v Determine frequency domain components.

[0047] For example, when n is 1, the first indication information is

[0048]

number

[0049] It occupies bits.

[0050] In a possible design, M v is 2.

[0051] In possible designs, N is one of 2, 3, 4, or 5.

[0052] In a possible design, the N candidate frequency-domain components include a plurality of types of frequency-domain component sets, and frequency-domain component subsets in the same type of frequency-domain component set are equivalent in the reconstruction of the precoding matrix by the radio access network device, and each frequency-domain component subset is one of M v It contains frequency domain components.

[0053] A possible design is when N is 3: The first indication information indicates two frequency domain components using one bit, and one of the frequency domain components is a frequency domain component at a start position or an end position among the N candidate frequency domain components. The first indication information indicates two frequency domain components using one bit, one of which is a frequency domain component of a specified value; or The first indication information indicates each type of frequency domain component set using one bit.

[0054] Possible designs include when N is 4 or 5: The first indication information indicates two frequency domain components using two bits, one of which is a frequency domain component at a start position or an end position among the N candidate frequency domain components. The first indication information indicates two frequency domain components using two bits, one of which is a frequency domain component of a specified value; or The first indication information indicates each type of frequency domain component set using two bits.

[0055] In a possible design, the first indication information is carried in precoding matrix indication PMI information, and the PMI information is carried in UCI.

[0056] In a possible design, the radio access network device may vThe strongest non-zero coefficient among the weighting coefficients corresponding to the frequency domain components is received. The priority corresponding to the strongest non-zero coefficient is the highest.

[0057] In a possible design, before the radio access network device receives the first indication information, the radio access network device may further receive capability information of the terminal device. The capability information of the terminal device includes a codebook combination supported by the terminal device, and the codebook combination is M v The radio access network device may further transmit second indication information. The second indication information may be used to determine the value of M v Indicates the value of

[0058] In a possible design, the capability information of the terminal device is provided by the M v and the maximum value of M indicated by the second indication information. v The value of M v is less than or equal to the maximum value of

[0059] In a possible design, the codebook combination is type1SP-FeType2M v 1-null, type1SP-FeType2M v 2-null, type1SP-FeType2-null, type1SP-eType2R1-FeType2M v 1. Type 1 SP-e Type 2 R2-Fe Type 2 M v 1. Type 1 SP-e Type 2 R1-Fe Type 2 M v 2. Type 1 SP-e Type 2 R2-Fe Type 2 M v 2, type1SP-eType2R1-FeType2, type1SP-eType2R2-FeType2, type1MP-FeType2M v 1-null, type1MP-FeType2M v 2-null, type1MP-FeType2-null, type1MP-eType2R1-FeType2Mv 1. Type1MP-eType2R2-FeType2M v 1. Type1MP-eType2R1-FeType2M v 2. Type1MP-eType2R2-FeType2M v 2, type1MP-eType2R1-FeType2, or type1MP-eType2R2-FeType2.

[0060] According to a third aspect, there is provided a communication method, in which a terminal device may report capability information of the terminal device, the capability information of the terminal device including codebook combinations supported by the terminal device, the codebook combinations being M v For example, the codebook combination includes one or more codebook types supported by the terminal device. The base station selects one codebook type in the codebook combination, and then determines the value of M corresponding to that codebook type. v The value of

[0061] The terminal device may receive second indication information. The second indication information may include: v Indicates the value of

[0062] In this method, the radio access network device v The terminal device may indicate the value of M v Based on the value of M v The radio access network device selects M frequency domain components selected by the terminal device. v A precoding matrix may be reconstructed based on the frequency domain components to enable uplink data transmission.

[0063] In a possible design, the capability information of the terminal device is provided by the M vand the maximum value of M indicated by the second indication information. v The value of M v is less than or equal to the maximum value of

[0064] M supported by the terminal device v The maximum number of ports for each resource, the maximum number of resources, and the maximum total number of ports may form a quadruplet, which is transmitted to the radio access network device.

[0065] In a possible design, the codebook combination is type1SP-FeType2M v 1-null, type1SP-FeType2M v 2-null, type1SP-FeType2-null, type1SP-eType2R1-FeType2M v 1. Type 1 SP-e Type 2 R2-Fe Type 2 M v 1. Type 1 SP-e Type 2 R1-Fe Type 2 M v 2. Type 1 SP-e Type 2 R2-Fe Type 2 M v 2, type1SP-eType2R1-FeType2, type1SP-eType2R2-FeType2, type1MP-FeType2M v 1-null, type1MP-FeType2M v 2-null, type1MP-FeType2-null, type1MP-eType2R1-FeType2M v 1. Type1MP-eType2R2-FeType2M v 1. Type1MP-eType2R1-FeType2M v 2. Type1MP-eType2R2-FeType2M v 2, type1MP-eType2R1-FeType2, or type1MP-eType2R2-FeType2.

[0066] According to a fourth aspect, there is provided a communication method, in which a radio access network device receives capability information of a terminal device, the capability information of the terminal device including codebook combinations supported by the terminal device, the codebook combinations being M v is used to determine the value of

[0067] The radio access network device transmits second indication information. The second indication information is v Indicates the value of

[0068] In a possible design, the capability information of the terminal device is provided by the M v and the maximum value of M indicated by the second indication information. v The value of M v is less than or equal to the maximum value of

[0069] In a possible design, the codebook combination is type1SP-FeType2M v 1-null, type1SP-FeType2M v 2-null, type1SP-FeType2-null, type1SP-eType2R1-FeType2M v 1. Type 1 SP-e Type 2 R2-Fe Type 2 M v 1. Type 1 SP-e Type 2 R1-Fe Type 2 M v 2. Type 1 SP-e Type 2 R2-Fe Type 2 M v 2, type1SP-eType2R1-FeType2, type1SP-eType2R2-FeType2, type1MP-FeType2M v 1-null, type1MP-FeType2M v 2-null, type1MP-FeType2-null, type1MP-eType2R1-FeType2M v 1. Type1MP-eType2R2-FeType2M v 1. Type1MP-eType2R1-FeType2M v2. Type1MP-eType2R2-FeType2M v 2, type1MP-eType2R1-FeType2, or type1MP-eType2R2-FeType2.

[0070] According to a fifth aspect, there is provided a communication device. The communication device may be the terminal device or radio access network device described above, or a chip disposed in the terminal device or radio access network device. The communication device may perform the method according to any one of the above aspects.

[0071] The communication device includes corresponding modules, units, or means for implementing the above methods. The modules, units, or means may be implemented using hardware or software, or by executing corresponding software using hardware. The hardware or software includes one or more modules or units corresponding to the above functions.

[0072] According to a sixth aspect, there is provided a communication device including a transceiver unit. Optionally, the communication device may further include a processing unit. The communication device may implement a method according to any one of the above aspects.

[0073] According to a seventh aspect, there is provided a communications device including a processor, the processor may be configured to perform a method according to any one of the above aspects.

[0074] Optionally, the apparatus further includes a memory, wherein the processor is coupled to the memory, and the processor may be configured to execute instructions in the memory such that the apparatus performs the method according to any one of the above aspects.

[0075] Optionally, the apparatus further comprises an interface circuit, the processor being coupled to the interface circuit.

[0076] The interface circuit may be a code / data read / write interface circuit configured to receive computer-executable instructions (which may be stored in a memory and read directly from the memory or read using another component) and transmit the computer-executable instructions to a processor, which executes the computer-executable instructions to perform a method according to any one of the above aspects.

[0077] In some possible designs, the communication device is a chip or a chip system.

[0078] According to an eighth aspect, there is provided a communications device including a processor and a memory, wherein the processor is configured to read instructions stored in the memory, receive signals using a receiver, and transmit signals using a transmitter to perform a method according to any one of the above aspects.

[0079] Optionally, there are one or more processors and one or more memories.

[0080] Optionally, the memory may be integral with the processor, or the memory and processor may be separately located.

[0081] In a particular implementation process, the memory may be a non-transitory memory such as a read-only memory (ROM). The memory and the processor may be integrated into one chip or may be located separately in different chips. The type of memory and the manner in which the memory and the processor are located are not limited to this embodiment of the present application.

[0082] The communication device may be a chip. The processor may be implemented using hardware or software. When the processor is implemented using hardware, it may be a logic circuit or an integrated circuit, etc., and when the processor is implemented using software, it may be a general-purpose processor and is implemented by reading software code stored in a memory. The memory may be integrated with the processor or may be located outside the processor and exist independently.

[0083] According to a ninth aspect, there is provided a processor including an input circuit, an output circuit, and a processing circuit configured to receive signals using the input circuit and transmit signals using the output circuit such that the processor performs a method according to any one of the above aspects.

[0084] In a specific implementation process, the processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a trigger, or various logic circuits, etc. The input signal received by the input circuit may be, for example, but not limited to, received and input by a receiver, and the signal output by the output circuit may be, for example, but not limited to, output to a transmitter and transmitted by the transmitter, and the input circuit and the output circuit may be the same circuit. This circuit may be used as an input circuit and an output circuit at different times. The specific implementation of the processor and various circuits is not limited to the embodiments of the present application.

[0085] According to a tenth aspect, there is provided a communication device including a logic circuit and an input / output interface. The input / output interface is configured to communicate with a module external to the communication device, and the logic circuit is configured to execute a computer program to perform a method according to any one of the above aspects. The communication device may be a terminal device or a radio access network device according to any one of the above aspects, or may be a device including a terminal device or a radio access network device, or may be a device such as a chip included in a terminal device or a radio access network device.

[0086] Alternatively, the input / output interface may be a code / data read / write interface circuit, configured to receive a computer program (which may be stored in a memory and read directly from the memory or may pass through another component) and transmit the computer program to the input / output interface, which executes the computer program to perform a method according to any one of the above aspects.

[0087] Optionally, the communication device may be a chip.

[0088] According to an eleventh aspect, there is provided a computer program product, the computer program product including a computer program (sometimes referred to as code or instructions), which, when executed, enables a computer to perform a method according to any one of the above aspects.

[0089] According to a twelfth aspect, there is provided a computer-readable medium storing a computer program (sometimes referred to as code or instructions) that, when executed on a computer, enables the computer to perform a method according to any one of the above aspects.

[0090] According to a thirteenth aspect, there is provided a chip system. The chip system includes a processor and an interface, and is configured to assist a communication device in implementing functions according to any one of the above aspects. In a possible design, the chip system further includes a memory configured to store information and data required by the communication device. The chip system may include a chip, or may include a chip and another discrete component.

[0091] According to a fourteenth aspect, there is provided a functional entity, which is configured to implement a method according to any one of the above aspects.

[0092] According to a fifteenth aspect, there is provided a communication system including a terminal device according to any one of the above aspects and a radio access network device.

[0093] For the technical effects provided by any one of the designs of the fifth to thirteenth aspects, please refer to the technical effects provided by the first to fourth aspects, and the details will not be repeated here. [Brief explanation of the drawings]

[0094] [Figure 1] 1 is a schematic diagram of the architecture of a communication system; [Figure 2] FIG. 1 is a schematic diagram of a channel state information indication process. [Figure 3] FIG. 1 is a schematic diagram of a channel state information indication process. [Figure 4] 1 is a schematic flow diagram of reporting frequency domain components according to an embodiment of the present application; [Figure 5] 1 is a schematic diagram of the structure of a communication device according to an embodiment of the present application; [Figure 6] 1 is a schematic diagram of the structure of a communication device according to an embodiment of the present application; [Figure 7]1 is a schematic diagram of the structure of a communication device according to an embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0095] The present application will now be described in more detail with further reference to the accompanying drawings.

[0096] In this application, all aspects, embodiments, or features are presented by describing a system that may include multiple devices, components, modules, etc. It is to be appreciated and understood that each system may include other devices, components, modules, etc. and / or may not include all of the devices, components, modules, etc. described with reference to the accompanying drawings. Furthermore, combinations of these solutions may also be used.

[0097] Furthermore, the word "exemplary" in the embodiments herein is used to indicate serving as an example, illustration, or illustration. Any embodiment or design described herein as "exemplary" is not intended to be preferred or have any additional advantages over other embodiments or designs. Rather, the term "exemplary" is used to present concepts in a concrete manner.

[0098] The network architectures and service scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and are not intended to limit the technical solutions provided in the embodiments of the present application. Those skilled in the art can understand that with the evolution of network architectures and the emergence of new service scenarios, the technical solutions provided in the embodiments of the present application can also be applied to similar technical problems.

[0099] Hereinafter, in order to facilitate understanding by those skilled in the art, some terms in the embodiments of the present application will be explained.

[0100] (1) A terminal device is a device configured to perform wireless communication functions. A terminal may be a user equipment (UE), access terminal, terminal unit, terminal station, mobile station, mode set, remote station, remote terminal, mobile device, wireless communication device, terminal agent, or terminal equipment in a 5th generation (5G) network or a future evolved public land mobile network (PLMN). An access terminal may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld or computing device with wireless communication capabilities, another processing device connected to a wireless modem, an in-vehicle device, or a wearable device, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart home, or a wireless terminal in a smart city, etc. Alternatively, the terminal may be a terminal in vehicle-to-everything (V2X) communication, a terminal in device-to-device communication, or a terminal in machine-to-machine (M2M) communication, etc. The terminal may be mobile or fixed.

[0101] (2) A network device is a device that enables a terminal device to access a wireless network. A network device may be a node of a radio access network and may also be called a base station or a radio access network (RAN) device (or node). For example, a network device may include an evolved base station (NodeB, eNB, or eNodeB, evolved NodeB) in a long term evolution (LTE) system or an LTE-Advanced (LTE-A) system, such as a conventional macro base station eNB and a micro base station eNB in ​​a heterogeneous network scenario. Alternatively, the network device may include a next generation NodeB (gNB) of a 5th generation (5G) new radio (NR) system, or may further include a transmission reception point (TRP), a home base station (e.g., a home evolved NodeB, HNB), a baseband unit (BBU), a baseband pool, a BBU pool, or a wireless fidelity (Wi-Fi) access point (AP), etc. Alternatively, the network device may further include a central unit (CU) or a distributed unit (DU) of a cloud radio access network (CloudRAN) system, or may include a network device of a non-terrestrial network (NTN), i.e., deployed on a high-altitude platform or satellite.In an NTN, a network device may act as a Layer 1 (L1) relay, a base station, a DU, or an integrated access and backhaul (IAB) node, which is not limited to the embodiments of the present application.

[0102] Of course, the network device may also be a node of the core network.

[0103] The term "and / or" in this application describes an associative relationship to describe related objects and indicates that three relationships may exist. For example, A and / or B may indicate three cases: A only exists, both A and B exist, and B only exists. The character " / " generally indicates an "or" relationship between related objects.

[0104] As used herein, "at least one" means one or more, and "multiple" means two or more.

[0105] Furthermore, it should be understood that in the description of this application, terms such as "first" and "second" are used merely for purposes of distinction and explanation and should not be understood as indicating or implying relative importance or as indicating or implying an order.

[0106] The technical solutions of the embodiments of the present application may be applied to various communication systems, such as a satellite communication system or a conventional mobile communication system. The satellite communication system may be integrated with a conventional mobile communication system (i.e., a terrestrial communication system). For example, the communication system may be a wireless local area network (WLAN) communication system, a wireless fidelity (Wi-Fi) system, a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, a fifth generation (5G) system or new radio (NR) system, a sixth generation (6G) system, or another future communication system. The technical solution further addresses communication systems that integrate multiple wireless technologies, such as systems that integrate non-terrestrial networks (NTNs) and terrestrial mobile communication networks, e.g. unmanned aerial vehicles, satellite communication systems, and high altitude platform station (HAPS) communications.

[0107] The communication system provided in the embodiments of the present application is applicable to communication between a radio access network device and a terminal device. The communication system may include one or more radio access network devices and one or more terminal devices. For example, as shown in FIG. 1, the communication system may include one or more network devices (e.g., base stations in FIG. 1) and one or more terminal devices (e.g., UE1 to UE6 in FIG. 1). The base station may transmit data to UE1 to UE6, and UE1 to UE6 may transmit uplink data to the base station. Optionally, UE4, UE5, and UE6 may constitute a communication system. In this communication system, the base station transmits downlink data to UE1, UE2, UE5, etc., and UE5 forwards the downlink data to UE4 and UE6. For example, UE5 may function as a relay node that forwards data between the UEs and the base station.

[0108] The 5G mobile communication system imposes higher requirements on system capacity, spectral efficiency, and transmission delay. As one of the key technologies of 5G, FDD massive multiple-input multiple-output (MIMO) antenna technology can effectively improve system capacity through spatial division multiplexing. A key factor for improving system capacity is for radio access network devices to obtain accurate downlink channel state information (CSI).

[0109] In an FDD system, there is a difference between the uplink frequency and the downlink frequency (for example, the uplink frequency is 2.1 GHz and the downlink frequency is 3.5 GHz), and there is no channel reciprocity between the uplink channel and the downlink channel. Therefore, the downlink CSI needs to be fed back to the radio access network device by the terminal device.

[0110] FIG. 2 is a schematic flow chart of downlink CSI feedback, including the following steps:

[0111] S201: A radio access network device sends channel measurement configuration information to a terminal device.

[0112] For example, the channel measurement configuration information includes time-frequency resources used for channel measurement.

[0113] S202: The radio access network device transmits a downlink reference signal used for channel measurement to the terminal device.

[0114] For example, the downlink reference signal may be a downlink channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), etc. This is not limited herein.

[0115] The terminal device receives a downlink reference signal based on the channel measurement configuration information.

[0116] S203: The terminal device estimates downlink CSI based on the received downlink reference signal, and feeds back the downlink CSI to the radio access network device.

[0117] The downlink CSI includes a rank indication (RI), a channel quality indication (CQI), a precoding matrix indication (PMI), and the like.

[0118] The RI indicates the number of valid data layers of a channel, and the radio access network device can know the number of code words (CWs) that can be supported by the terminal device based on the RI. For example, if RI=1, one CW is supported, and if RI>1, two CWs are supported.

[0119] The CQI reflects the channel quality of the downlink channel. For example, 0 to 15 are used to indicate the channel quality, where 0 indicates the worst channel quality and 15 indicates the best channel quality. After obtaining the CQI value, it implies that the radio access network device knows the quality of the current downlink channel and therefore selects a suitable channel for scheduling.

[0120] The PMI is used to determine a precoding matrix. For example, the PMI contains information about a coefficient matrix. Simply put, precoding is multiplying data by a precoding matrix.

[0121] S204: The radio access network device determines a precoding matrix corresponding to downlink data transmission based on the downlink CSI fed back by the terminal device, and transmits the downlink data based on the precoding matrix.

[0122] For example, the radio access network device determines the quantity of data flow for downlink transmission based on RI information fed back by the terminal device, determines the modulation order of downlink data based on CQI information fed back by the terminal device, and determines the precoding matrix for downlink data transmission based on PMI fed back by the terminal device.

[0123] Although there is no channel reciprocity between the uplink and downlink channels in an FDD system, some information in the uplink and downlink channels of an FDD system is reciprocal. For example, the angle and delay of the uplink and downlink channels are reciprocal. Therefore, the CSI feedback procedure may be designed based on the angle and delay reciprocity of the FDD system.

[0124] FIG. 3 is a schematic flow diagram of reciprocity-based CSI feedback for FDD, which includes the following steps:

[0125] S301: A terminal device transmits an uplink reference signal to a radio access network device.

[0126] For example, the uplink reference signal may be a sounding reference signal (SRS).

[0127] S302: The radio access network device performs channel estimation on an uplink channel to obtain prior information of a downlink channel.

[0128] For example, the a priori information of the downlink channel includes the angle and delay of the downlink channel.

[0129] S303: The radio access network device transmits a downlink reference signal based on prior information of a downlink channel.

[0130] The terminal device performs channel measurements based on the downlink reference signal.

[0131] For S304, please refer to S203.

[0132] For example, the downlink CSI fed back by the terminal device in S304 may only be non-reciprocity information of the uplink and downlink channels. The radio access network device has acquired reciprocity information of the uplink and downlink channels, such as prior information of the downlink channel, in S302. Therefore, the terminal device does not need to feed back reciprocity information in this step. This reduces feedback overhead.

[0133] S305: The radio access network device determines a precoding matrix based on the prior information of the downlink channel and the downlink CSI fed back by the terminal device in S304, and transmits downlink data based on the precoding matrix.

[0134] In the 3GPP R16 and R17 technical specifications, the precoding matrix (sometimes called a precoding codebook) is sometimes given in the following format:

[0135]

number

[0136] The W matrix is ​​P CSI-RS It contains rows and N3 columns.

[0137]

number

[0138] and W1 is the port selection matrix, and L ports are CSI-RS P CSI-RS indicates the number of ports that transmit the reference signal CSI-RS.

[0139]

number

[0140] ,

[0141]

number

[0142] , and W f is the frequency domain fundamental matrix (also called the frequency domain compressed matrix), and W f N denotes M columns, i.e., M frequency domain components, selected from a discrete Fourier transform (DFT) matrix set. N3 is the number of frequency domain RB resources, or the number of subbands of a bandwidth part (BWP) supported by a terminal device.

[0143] In a related technique, a radio access network device indicates a window length N to a terminal device, and the start position of the window length N is the start position of N3 candidate frequency domain components. The terminal device selects M from the N consecutive candidate frequency domain components based on the indication of the radio access network device. v Select M frequency domain components. v The frequency domain components may be continuous or discontinuous, and the subscript v denotes the layer (sometimes called flow) index. N>M v When

[0144]

number

[0145] bits are used to indicate selected frequency domain components to the radio access network device. For example, M vWhen N = 2 and N = 4, there are six possible selection methods for the terminal device to select two frequency domain components from four DFT vectors, and the terminal device requires three bits of information for indication. However, in multiple frequency domain component selection methods, the radio access network device may determine precoding matrices with the same coding effect. Therefore, when the terminal device indicates each frequency domain component selection method, there is unnecessary feedback overhead of the indication information of the frequency domain components.

[0146] On this basis, the embodiment of the present application provides a frequency domain component reporting method, which can be applied to the communication system of Fig. 1. In this method, a terminal device reports N candidate frequency domain components M v The frequency domain components are sometimes selected and shown as M v The indication information indicating the frequency domain components is

[0147]

number

[0148] occupies M bits, v is a positive integer less than N,

[0149]

number

[0150] is a round-up operation to the nearest integer. In the frequency domain component reporting method provided in this embodiment of the present application, M v Considering that different frequency domain components may enable the radio access network device to determine precoding matrices with the same coding effect, M v The frequency domain components can be represented using the same bit value, thereby reducing the feedback overhead of the frequency domain components.

[0151] 4 is a possible frequency domain component reporting process according to an embodiment of the present application. This process includes the following steps:

[0152] S401: The terminal device is v frequency domain components are obtained.

[0153] M v The frequency domain components are a subset of the N candidate frequency domain components. v is a positive integer equal to or less than N, and the subscript v indicates the index of the layer (sometimes called a flow), which corresponds to the vth layer data or the vth flow data when the radio access network device performs multiple-input multiple-output (MIMO) transmission to the terminal device. For the vth layer (flow), the terminal device transmits M v The M corresponding frequency domain components are denoted by v The frequency domain components may be the same or different. v When the values ​​of are the same, the terminal device v The frequency domain components may be simultaneously shown, or the M corresponding to the vth layer (flow) v The frequency domain components corresponding to different layers (flows) are sometimes referred to separately. v When the values ​​of are different, the terminal device uses M corresponding to the vth layer (flow). v The frequency domain components may be separately represented as N candidate frequency domain components. Note that before S401, information about the N candidate frequency domain components is known to the terminal device. How the terminal device knows the N candidate frequency domain components is not limited herein. In general, when the terminal device knows the N candidate frequency domain components, v When referring to frequency domain components, M v The indices of the frequency domain components are shown.

[0154] At S401, the terminal device selects M from N candidate frequency domain components. v For example, the terminal device may select M frequency domain components from N candidate frequency domain components. v In another example, we may randomly select M frequency domain components. v When N is the number of candidate frequency domain components, the terminal device directly converts the N candidate frequency domain components into M v Alternatively, the terminal device may use all N candidate frequency domain components.

[0155] M v The value of may be protocol-specific or may be set by the radio access network device. For the setting method by the radio access network device, please refer to the following content.

[0156] For example, M v is 1, and N is an integer greater than or equal to 1. For example, N is 1 or 2.

[0157] In another example, M v is 2, and N is an integer greater than or equal to 2. For example, N can be one of 2, 3, 4, or 5.

[0158] In another example, M v is an integer greater than 2, and N is M v An integer greater than or equal to .

[0159] The terminal device may obtain the classification and combination result of N candidate frequency domain components. For example, the classification and combination result is at least two types (e.g., N-1 types) of frequency domain component sets. The terminal device obtaining the classification and combination result of N candidate frequency domain components may mean that the terminal device performs classification and combination on the N candidate frequency domain components, or that the radio access network device delivers the classification and combination result to the terminal device, or may be protocol-specified. Each frequency domain component subset in each type of frequency domain component set is equivalent in the reconstruction of a precoding matrix by the radio access network device. In other words, the radio access network device may obtain a precoding matrix having the same coding effect through reconstruction based on any frequency domain component subset. Each frequency domain component subset is M v frequency domain components, and the number of frequency domain components separating the frequency domain components in the frequency domain component subsets in the different types of frequency domain component sets is different, while the number of frequency domain components separating the frequency domain components at corresponding positions in the frequency domain component subsets in the same type of frequency domain component set is the same. For example, two adjacent frequency domain components in any frequency domain component subset in the same type of frequency domain component set are consecutive or separated by one frequency domain component or two frequency domain components.

[0160] The following briefly describes the equivalence of the frequency domain component subsets in each type of frequency domain component set in the reconstruction of the precoding matrix by the radio access network device. W1 and W2 are determined, and M v is 2, N is 4, and the candidate frequency domain components are

[0161]

number

[0162] Assume that w f1 , w f2 , w f3 , and w f4 are four frequency domain components separated by consecutive frequency domain components of the same number, and w f1 , w f2 , w f3 , and w f4 Two adjacent frequency domain components in M ​​have a constant phase offset. v The selected frequency domain components are W f ={w f1 , w f2}, then the precoding matrix is

[0163]

number

[0164] It is. M v The selected frequency domain components are

[0165]

number

[0166] If

[0167]

number

[0168] is.

[0169]

number

[0170] teeth,

[0171]

number

[0172] A vector for each column of the matrix

[0173]

number

[0174] The frequency domain components {w f2 , w f3 The corresponding precoding matrix when} is selected (called precoding matrix 1) is multiplied by a complex number with absolute value 1, which is the frequency domain component {w f1 , w f2 It can be seen that the corresponding precoding matrix (called precoding matrix 2) when {w f2 , w f3} and {w f1 , w f2} are considered to be equivalent in the reconstruction of the precoding matrix by the radio access network device, or to have the same coding effect.

[0175] In the following, M v An example will be described in which N is 2 and N is an integer greater than 2. In the following example, the N candidate frequency domain components are consecutive candidate frequency domain components, and the starting value of the frequency domain components is 0. It should be noted that the starting value of the candidate frequency domain components may alternatively be another value, and when the starting value is another value, the N candidate frequency domain component sets are combined and classified in the same manner as in the following example. For example, when the starting value is 1, the N candidate frequency domain components may include {1, 2, ..., N}. When N is a larger value (e.g., greater than 5), the N candidate frequency domain component sets are combined and classified in the same manner as in the following example. Details will not be repeated in this specification.

[0176] Example 1: M v is 2, N is 3, and the candidate frequency domain components include {0, 1, 2}.

[0177] Three consecutive candidate frequency-domain components are sorted and combined to obtain two types of frequency-domain component sets. The first type of frequency-domain component set is {(0, 1), (1, 2)}, and the second type of frequency-domain component set is {0, 2}. Two frequency-domain components in the first type of frequency-domain component set are adjacent, and two frequency-domain components in the second type of frequency-domain component set are separated by one frequency-domain component. The frequency-domain component subsets in the first type of frequency-domain component set are (0, 1) and (1, 2), and the frequency-domain component subset in the second type of frequency-domain component set is (0, 2).

[0178] Example 2: M v is 2, N is 4, and the candidate frequency domain components include {0, 1, 2, 3}.

[0179] Four consecutive candidate frequency-domain components are sorted and combined to obtain three types of frequency-domain component sets. The first type of frequency-domain component set is {(0, 1), (1, 2), (2, 3)}, the second type of frequency-domain component set is {(0, 2), (1, 3)}, and the third type of frequency-domain component set is {(0, 3)}. Two frequency-domain components in the first type of frequency-domain component set are adjacent, two frequency-domain components in the second type of frequency-domain component set are separated by one frequency-domain component, and two frequency-domain components in the third type of frequency-domain component set are separated by two frequency-domain components.

[0180] Example 3: M v is 2, N is 5, and the candidate frequency domain components include {0, 1, 2, 3, 4}.

[0181] Five consecutive candidate frequency-domain components are sorted and combined to obtain four types of frequency-domain component sets. The first type of frequency-domain component set is {(0,1), (1,2), (2,3), (3,4)}, the second type of frequency-domain component set is {(0,2), (1,3), (2,4)}, the third type of frequency-domain component set is {(0,3), (1,4)}, and the fourth type of frequency-domain component set is {(0,4)}. Two frequency-domain components in the first type of frequency-domain component set are adjacent, two frequency-domain components in the second type of frequency-domain component set are separated by one frequency-domain component, two frequency-domain components in the third type of frequency-domain component set are separated by two frequency-domain components, and two frequency-domain components in the fourth type of frequency-domain component set are separated by three frequency-domain components.

[0182] Optionally, before step 2401, S400 is further included, in which the terminal device obtains N candidate frequency domain components.

[0183] N is a positive integer, and N is generally equal to or less than N3. The frequency domain components are column vectors in the DFT matrix that are generated based on the number N3 of subbands.

[0184] The N candidate frequency domain components may be N consecutive candidate frequency domain components, and any two adjacent frequency domain components among the N consecutive candidate frequency domain components have a constant phase offset. This embodiment of the present application mainly uses this case for description. Alternatively, the N candidate frequency domain components may be N discontinuous candidate frequency domain components.

[0185] The N candidate frequency domain components may be protocol-specified or may be set by the radio access network device. The N candidate frequency domain components may be determined using a number N of candidate frequency domain components and positions of the candidate frequency domain components.

[0186] If the N candidate frequency domain components are set by the radio access network device, the radio access network device may transmit the number N of the candidate frequency domain components and the positions (e.g., start positions or end positions) of the optional candidate frequency domain components to the terminal device at S400. If the radio access network device does not indicate the positions of the candidate frequency domain components, the terminal device may default to considering the positions of the candidate frequency domain components to be the start positions of the N frequency domain components.

[0187] If the N candidate frequency domain components are protocol-specified, the terminal device may store the number N of the candidate frequency domain components and the positions of the optional candidate frequency domain components. Of course, the radio access network device also stores the N candidate frequency domain components, or stores the number N of the candidate frequency domain components and the positions of the optional candidate frequency domain components.

[0188] S402: The terminal device transmits first indication information. In response, the radio access network device receives the first indication information. The first indication information is M v the first indication information indicates frequency domain components,

[0189]

number

[0190] It occupies bits.

[0191] The first indication information is included in precoding matrix indication PMI information, and the PMI information may be carried in uplink control information (UCI). The UCI may be used by the terminal device to feed back downlink CSI.

[0192] In this embodiment, one (or more) frequency domain components may be reported by default, and the terminal device selects (M v −1) frequency domain components to be reported. Since one (or more) frequency domain components reported by default do not need to be indicated by additional bits, the feedback overhead of the frequency domain components can be reduced. In this case, the N candidate frequency domain components may or may not be classified and combined.

[0193] Alternatively, in this embodiment, the N candidate frequency-domain components may be classified and combined. Each type of frequency-domain component set includes one or more frequency-domain component subsets, and each frequency-domain component subset may include one or more frequency-domain component subsets. v The terminal device selects to report one type of frequency domain component set from at least two types of frequency domain component sets (this type of frequency domain component set is selected by the terminal device). v Since the frequency domain component set (including the frequency domain component subset in which M frequency domain components are located) occupies little bit overhead when the frequency domain component set is indicated, the feedback overhead of the frequency domain components can be reduced. In this case, one (or more) frequency domain components can be reported by default, so that the terminal device can v -1) may report the frequency domain component set in which the selected frequency domain components are located.

[0194] When N consecutive candidate frequency-domain components are sorted and combined, the frequency-domain component subsets in the same type of frequency-domain component set are equivalent in the reconstruction of the precoding matrix by the radio access network device. Therefore, indicating any frequency-domain component subset in the same type of frequency-domain component set by the terminal device does not affect the result of the reconstruction of the precoding matrix by the radio access network device.

[0195] Different schemes for indicating frequency domain components will be described below using several examples. The indication scheme used when the terminal device reports the frequency domain components may be protocol-specified or may be set by the radio access network device. For example, the terminal device may obtain the indication scheme used to report the frequency domain components before S401. If the indication scheme is set by the radio access network device, optionally, before S401, the radio access network device transmits third indication information to the terminal device. The third indication information indicates the indication scheme used when the terminal device reports the frequency domain components. In S400, the radio access network device may indicate the third indication information and the N candidate frequency domain components to the terminal device by including them in the same message, or may indicate the third indication information and the N candidate frequency domain components to the terminal device by including them in different messages.

[0196] Example 1: M v is 2, N is 3, the candidate frequency domain components include {0, 1, 2}, and the two types of frequency domain component sets obtained through classification and combination are a first type frequency domain component set {(0, 1), (1, 2)} and a second type frequency domain component set {(0, 2)}, respectively. If the equivalence of reconstruction of the precoding matrix is ​​not considered, there are six possibilities for selecting two frequency domain components from three consecutive candidate frequency domain components, and at least three bits are required for indication. However, if the equivalence of reconstruction of the precoding matrix is ​​considered, the first indication information indicates the frequency domain component using one bit. Therefore, the bit overhead of the indication of the frequency domain component can be reduced.

[0197] Scheme 1.1: A frequency domain component at a start position or an end position among the N candidate frequency domain components may be selected by default. In other words, the frequency domain component at the start position or the end position does not need to be reported, and the terminal device may report only one frequency domain component. In this case, the terminal device may select from N-1 frequency domain components. Whether the frequency domain component at the start position or the end position is selected by the terminal device not to be reported by default may be configured by the radio access network device or may be protocol-specified. If the radio access network device performs this configuration, when the radio access network device indicates third indication information (in this case, the third indication information indicates the reporting scheme used in Scheme 1.1), the radio access network device may instruct the terminal device to select not to report the frequency domain component at the start position or the end position by default.

[0198] For example, the frequency domain component at the start position is selected by default. Possible indication schemes are shown in Table 1. The terminal device indicates the two selected frequency domain components using one bit. When the bit value is 0, it indicates that the terminal device reports frequency domain component 1. Because the radio access network device assumes by default that the terminal device selects the frequency domain component at the start position and does not need to report a frequency domain component, when the bit value is 0, the radio access network device may determine that the terminal device actually wants to report frequency domain component (0, 1). When the bit value is 1, it indicates that the terminal device reports frequency domain component 2. Because the radio access network device assumes by default that the terminal device selects the frequency domain component at the start position, when the bit value is 1, the radio access network device may determine that the terminal device actually wants to report frequency domain component (0, 2).

[0199] It should be noted that the terminal device and the radio access network device store the same correspondence between bit values ​​and frequency domain components (e.g., the correspondences shown in each of the following tables). Therefore, the radio access network device can determine the frequency domain components that the terminal device actually wants to report based on the bit values ​​of the first indication information reported by the terminal device. The correspondence between the bit values ​​and the frequency domain components may be protocol-specified or may be configured by the radio access network device. If the radio access network device performs this configuration, the radio access network device needs to configure the correspondence between the bit values ​​and the frequency domain components for the terminal device before S402. The opportunity for configuration by the radio access network device is not limited in this embodiment of the present application.

[0200] [Table 1]

[0201] In another example, the frequency domain component at the end position is selected by default. Possible indication schemes are shown in Table 2. The terminal device indicates the two selected frequency domain components using one bit. When the bit value is 0, it indicates that the terminal device reports frequency domain component 0. Because the radio access network device assumes by default that the terminal device selects the frequency domain component at the end position, when the bit value is 0, the radio access network device may determine that the terminal device actually wants to report frequency domain component (0, 2). When the bit value is 1, it indicates that the terminal device reports frequency domain component 1. Because the radio access network device assumes by default that the terminal device selects the frequency domain component at the end position, when the bit value is 1, the radio access network device may determine that the terminal device actually wants to report frequency domain component (1, 2).

[0202] [Table 2]

[0203] Scheme 1.2: A frequency domain component having a specific value among the N candidate frequency domain components may be selected by default. In other words, a frequency domain component having a specific value does not need to be reported, and the terminal device may report only one frequency domain component. In this case, the terminal device may select from N-1 frequency domain components. The terminal device selects not to report a frequency domain component having a specific value by default, which may be configured by the radio access network device or specified by the protocol. If the radio access network device performs this configuration, the radio access network device may instruct the terminal device to select not to report a frequency domain component having a specific value (e.g., frequency domain component 0 or 2) by default when indicating third indication information (in this case, the third indication information indicates the reporting scheme used in Scheme 1.2).

[0204] For example, frequency domain component 0 is selected by default. Possible indication schemes are shown in Table 3. The terminal device indicates two selected frequency domain components using one bit, and the terminal device reports frequency domain component 0 by default. When the bit value is 0, it indicates that the frequency domain component reported by the terminal device is (0, 1). The radio access network device may determine that the terminal device wants to report frequency domain component (0, 1). When the bit value is 1, it indicates that the terminal device wants to report frequency domain component (0, 2). The radio access network device may determine that the terminal device wants to report frequency domain component (0, 2).

[0205] [Table 3]

[0206] In another example, frequency domain component 2 is selected by default. Possible indication schemes are shown in Table 4. The terminal device indicates the two selected frequency domain components using one bit, and the terminal device reports frequency domain component 2 by default. When the bit value is 0, it indicates that the frequency domain component reported by the terminal device is (0, 2). The radio access network device may determine that the terminal device wants to report frequency domain component (0, 2). When the bit value is 1, it indicates that the terminal device wants to report frequency domain component (1, 2). The radio access network device may determine that the terminal device wants to report frequency domain component (1, 2).

[0207] [Table 4]

[0208] Method 1.3: The terminal device selects any frequency domain component from each type of frequency domain component set (i.e., equivalent frequency domain component) for indication. In this case, the terminal device may select from N frequency domain components.

[0209] Possible indication schemes are shown in Table 5. The terminal device indicates two selected frequency-domain components using one bit. When the bit value is 0, it indicates that the terminal device reports a first-type frequency-domain component set, i.e., two adjacent frequency-domain components. The radio access network device may determine that the terminal device wants to report frequency-domain components (0, 1) or (0, 2). Because (0, 1) and (0, 2) belong to the same type of frequency-domain component set and are equivalent in reconstructing the precoding matrix, the radio access network device may randomly select either (0, 1) or (0, 2) to reconstruct the precoding matrix. When the bit value is 1, it indicates that the terminal device reports a second-type frequency-domain component set, i.e., two frequency-domain components separated by one frequency-domain component. The radio access network device may determine that the terminal device wants to report frequency-domain components (1, 2).

[0210] [Table 5]

[0211] Example 2: M v is 2, N is 4, the candidate frequency domain components include {0, 1, 2, 3}, and three types of frequency domain component sets obtained through classification and combination are a first type frequency domain component set {(0, 1), (1, 2), (2, 3)}, a second type frequency domain component set {(0, 2), (1, 3)}, and a third type frequency domain component set {(0, 3)}, respectively. If the equivalence of reconstruction of the precoding matrix is ​​not considered, there are eight possibilities for selecting two frequency domain components from four consecutive candidate frequency domain components, and at least three bits are required for indication. However, if the equivalence of reconstruction of the precoding matrix is ​​considered, the first indication information indicates the frequency domain component using two bits. Therefore, the bit overhead of the indication of the frequency domain component can be reduced.

[0212] Method 2.1: The frequency domain component at the start position or the end position among the N candidate frequency domain components may be selected by default.

[0213] For example, the frequency domain component at the start position is selected by default. Possible indication schemes are shown in Table 6. The terminal device indicates the two selected frequency domain components using two bits. When the value of the two bits is 00, it indicates that the terminal device reports frequency domain component 1. Because the radio access network device assumes by default that the terminal device selects the frequency domain component at the start position, when the value of the two bits is 00, the radio access network device may determine that the terminal device actually wants to report frequency domain component (0, 1). When the value of the two bits is 01, it indicates that the terminal device reports frequency domain component 2. Because the radio access network device assumes by default that the terminal device selects the frequency domain component at the start position, when the value of the two bits is 01, the radio access network device may determine that the terminal device actually wants to report frequency domain component (0, 2). When the value of the two bits is 10, it indicates that the terminal device reports frequency domain component 3. Since the radio access network device assumes by default that the terminal device selects the frequency domain component at the starting position, when the value of the two bits is 10, the radio access network device may determine that the terminal device actually wants to report the frequency domain component (0, 3).

[0214] [Table 6]

[0215] In another example, the frequency domain component at the end position is selected by default. Possible indication schemes are shown in Table 7. The terminal device indicates the two selected frequency domain components using two bits. When the values ​​of the two bits are 00, it indicates that the terminal device reports frequency domain component 0. Because the radio access network device assumes by default that the terminal device selects the frequency domain component at the end position, when the values ​​of the two bits are 00, the radio access network device may determine that the terminal device actually wants to report frequency domain component (0, 3). When the values ​​of the two bits are 01, it indicates that the terminal device reports frequency domain component 1. Because the radio access network device assumes by default that the terminal device selects the frequency domain component at the end position, when the values ​​of the two bits are 01, the radio access network device may determine that the terminal device actually wants to report frequency domain component (1, 3). When the value of the two bits is 10, it indicates that the terminal device reports frequency domain component 2. Since the radio access network device assumes by default that the terminal device selects the frequency domain component at the end position, when the value of the two bits is 10, the radio access network device may determine that the terminal device actually wants to report frequency domain component (2, 3).

[0216] [Table 7]

[0217] Method 2.2: A frequency domain component having a specific value among the N candidate frequency domain components may be selected by default.

[0218] For example, frequency domain component 0 is selected by default. A possible indication scheme is shown in Table 8. The terminal device indicates two selected frequency domain components using two bits, and the terminal device reports frequency domain component 0 by default. When the values ​​of the two bits are 00, it indicates that the frequency domain components reported by the terminal device are (0, 1). The radio access network device may determine that the terminal device wants to report frequency domain components (0, 1). When the values ​​of the two bits are 01, it indicates that the frequency domain components reported by the terminal device are (0, 2). The radio access network device may determine that the terminal device wants to report frequency domain components (0, 2). When the value of the two bits is 10, it indicates that the frequency domain components reported by the terminal device are (0, 3). The radio access network device may determine that the terminal device wants to report frequency domain components (0, 3).

[0219] [Table 8]

[0220] In another example, frequency domain component 3 is selected by default. A possible indication scheme is shown in Table 9. The terminal device indicates the two selected frequency domain components using two bits, and the terminal device reports frequency domain component 3 by default. When the values ​​of the two bits are 00, it indicates that the frequency domain components reported by the terminal device are (0, 3). The radio access network device may determine that the terminal device wants to report frequency domain components (0, 3). When the values ​​of the two bits are 01, it indicates that the frequency domain components reported by the terminal device are (1, 3). The radio access network device may determine that the terminal device wants to report frequency domain components (1, 3). When the value of the two bits is 10, it indicates that the frequency domain components reported by the terminal device are (2, 3). The radio access network device may determine that the terminal device wants to report frequency domain components (2, 3).

[0221] [Table 9]

[0222] Method 2.3: The terminal device selects any frequency domain component from the set of frequency domain components of each type for indication.

[0223] Possible indication schemes are shown in Table 10. The terminal device indicates two selected frequency domain components using two bits. When the values ​​of the two bits are 00, it indicates that the terminal device reports a first type of frequency domain component set, i.e., two adjacent frequency domain components. The radio access network device may determine that the terminal device wants to report frequency domain components (0, 1), (1, 2), or (2, 3). Because (0, 1), (1, 2), and (2, 3) belong to the same type of frequency domain component set and are equivalent in reconstructing the precoding matrix, the radio access network device may randomly select (0, 1), (1, 2), or (2, 3) to reconstruct the precoding matrix. When the values ​​of the two bits are 01, it indicates that the terminal device reports a second type of frequency domain component set, i.e., two frequency domain components separated by one frequency domain component. The radio access network device may determine that the terminal device wants to report frequency domain components (0, 2) or (1, 3). Because (0, 2) and (1, 3) belong to the same type of frequency domain component set and are equivalent in reconstructing the precoding matrix, the radio access network device may randomly select either (0, 2) or (1, 3) to reconstruct the precoding matrix. When the value of the two bits is 10, it indicates that the terminal device reports a third type of frequency domain component set, i.e., two frequency domain components separated by two frequency domain components.

[0224] [Table 10]

[0225] Example 3: M vis 2, N is 5, the candidate frequency domain components include {0, 1, 2, 3, 4}, and the four types of frequency domain component sets obtained through classification and combination are a first type frequency domain component set {(0, 1), (1, 2), (2, 3), (3, 4)}, a second type frequency domain component set {(0, 2), (1, 3), (2, 4)}, a third type frequency domain component set {(0, 3), (1, 4)}, and a fourth type frequency domain component set {(0, 4)}. If the equivalence of reconstruction of the precoding matrix is ​​not considered, there are 10 possibilities for selecting two frequency domain components from the five consecutive candidate frequency domain components, and at least four bits are required for indication. However, if the equivalence of reconstruction of the precoding matrix is ​​considered, the first indication information indicates the frequency domain component using two bits. Therefore, the bit overhead of the indication of the frequency domain component can be reduced.

[0226] Method 3.1: The frequency domain component at the start position or the end position among the N candidate frequency domain components may be selected by default.

[0227] For example, the frequency domain component at the start position is selected by default. Possible indication schemes are shown in Table 11. The terminal device indicates the two selected frequency domain components using two bits. When the value of the two bits is 00, it indicates that the terminal device reports frequency domain component 1. Because the radio access network device assumes by default that the terminal device selects the frequency domain component at the start position, when the value of the two bits is 00, the radio access network device may determine that the terminal device actually wants to report frequency domain component (0, 1). When the value of the two bits is 01, it indicates that the terminal device reports frequency domain component 2. Because the radio access network device assumes by default that the terminal device selects the frequency domain component at the start position, when the value of the two bits is 01, the radio access network device may determine that the terminal device actually wants to report frequency domain component (0, 2). When the value of the two bits is 10, it indicates that the terminal device reports frequency domain component 3. Because the radio access network device assumes by default that the terminal device selects the frequency domain component at the start position, when the value of the two bits is 10, the radio access network device may determine that the terminal device actually wants to report frequency domain component (0, 3). When the value of the two bits is 11, it indicates that the terminal device reports frequency domain component 4. Because the radio access network device assumes by default that the terminal device selects the frequency domain component at the start position, when the value of the two bits is 11, the radio access network device may determine that the terminal device actually wants to report frequency domain component (0, 4).

[0228] [Table 11]

[0229] In another example, the frequency domain component at the end position is selected by default. Possible indication schemes are shown in Table 12. The terminal device indicates the two selected frequency domain components using two bits. When the value of the two bits is 00, it indicates that the terminal device reports frequency domain component 0. Because the radio access network device assumes by default that the terminal device selects the frequency domain component at the end position, when the value of the two bits is 00, the radio access network device may determine that the terminal device actually wants to report frequency domain component (0, 4). When the value of the two bits is 01, it indicates that the terminal device reports frequency domain component 1. Because the radio access network device assumes by default that the terminal device selects the frequency domain component at the end position, when the value of the two bits is 01, the radio access network device may determine that the terminal device actually wants to report frequency domain component (1, 4). When the value of the two bits is 10, it indicates that the terminal device reports frequency domain component 2. Because the radio access network device assumes by default that the terminal device selects the frequency domain component at the end position, when the value of the two bits is 10, the radio access network device may determine that the terminal device actually wants to report frequency domain component (2, 4). When the value of the two bits is 11, it indicates that the terminal device reports frequency domain component 3. Because the radio access network device assumes by default that the terminal device selects the frequency domain component at the end position, when the value of the two bits is 11, the radio access network device may determine that the terminal device actually wants to report frequency domain component (3, 4).

[0230] [Table 12]

[0231] Method 2.2: A frequency domain component having a specific value among the N candidate frequency domain components may be selected by default.

[0232] For example, frequency domain component 0 is selected by default. Possible indication schemes are shown in Table 13. The terminal device indicates two selected frequency domain components using two bits, and the terminal device reports frequency domain component 0 by default. When the values ​​of the two bits are 00, it indicates that the frequency domain components reported by the terminal device are (0, 1). The radio access network device may determine that the terminal device wants to report frequency domain components (0, 1). When the values ​​of the two bits are 01, it indicates that the frequency domain components reported by the terminal device are (0, 2). The radio access network device may determine that the terminal device wants to report frequency domain components (0, 2). When the value of the two bits is 10, it indicates that the frequency domain components reported by the terminal device are (0, 3). The radio access network device may determine that the terminal device wants to report frequency domain components (0, 3). When the value of the two bits is 11, it indicates that the frequency domain components reported by the terminal device are (0, 4). The radio access network device may determine that the terminal device wishes to report frequency domain components (0, 4).

[0233] [Table 13]

[0234] In another example, frequency domain component 4 is selected by default. A possible indication scheme is shown in Table 14. The terminal device indicates the two selected frequency domain components using two bits, and the terminal device reports frequency domain component 4 by default. When the values ​​of the two bits are 00, it indicates that the frequency domain components reported by the terminal device are (0, 4). The radio access network device may determine that the terminal device wants to report frequency domain components (0, 4). When the values ​​of the two bits are 01, it indicates that the frequency domain components reported by the terminal device are (1, 4). The radio access network device may determine that the terminal device wants to report frequency domain components (1, 4). When the value of the two bits is 10, it indicates that the frequency domain components reported by the terminal device are (2, 4). The radio access network device may determine that the terminal device wants to report frequency domain components (2, 4). When the value of the two bits is 11, it indicates that the frequency domain components reported by the terminal device are (3, 4). The radio access network device may determine that the terminal device wishes to report frequency domain components (3, 4).

[0235] [Table 14]

[0236] Method 2.3: The terminal device selects any frequency domain component from the set of frequency domain components of each type for indication.

[0237] Possible indication schemes are shown in Table 15. The terminal device indicates two selected frequency domain components using two bits. When the values ​​of the two bits are 00, it indicates that the terminal device reports a first type of frequency domain component set, i.e., two adjacent frequency domain components. The radio access network device may determine that the terminal device wants to report frequency domain components (0, 1), (1, 2), (2, 3), or (3, 4). Because (0, 1), (1, 2), (2, 3), and (3, 4) belong to the same type of frequency domain component set and are equivalent in reconstructing the precoding matrix, the radio access network device may randomly select (0, 1), (1, 2), (2, 3), or (3, 4) to reconstruct the precoding matrix. When the values ​​of the two bits are 01, it indicates that the terminal device reports a second type of frequency domain component set, i.e., two frequency domain components separated by one frequency domain component. The radio access network device may determine that the terminal device wants to report frequency-domain components (0, 2), (1, 3), or (2, 4). Because (0, 2), (1, 3), and (2, 4) belong to the same type of frequency-domain component set and are equivalent in reconstructing a precoding matrix, the radio access network device may randomly select (0, 2), (1, 3), or (2, 4) to reconstruct a precoding matrix. When the value of the two bits is 10, it indicates that the terminal device reports a third type of frequency-domain component set, i.e., two frequency-domain components separated by two frequency-domain components. The radio access network device may determine that the terminal device wants to report frequency-domain components (0, 3) or (1, 4). Because (0, 3) and (1, 4) belong to the same type of frequency-domain component set and are equivalent in reconstructing a precoding matrix, the radio access network device may randomly select either (0, 3) or (1, 4) to reconstruct a precoding matrix.When the value of the two bits is 11, it indicates that the terminal device reports a fourth type of frequency domain component set, i.e., two frequency domain components separated by three frequency domain components. The radio access network device may determine that the terminal device wants to report frequency domain components (0, 4).

[0238] [Table 15]

[0239] It can be understood that the above tables are merely examples and do not constitute limitations on the representation format. There may be more or fewer correspondences between the bit values ​​in the tables and the reported frequency domain components. For example, these tables may be split or combined. Alternatively, a frequency domain component indicated by a bit value in a table may be replaced with another frequency domain component (which may be another frequency domain component in the table or a frequency domain component not in the table). Alternatively, the order of correspondences between the bit values ​​in the tables and the reported frequency domain components is not limited to the above tables. This is not a limitation in this embodiment of the present application.

[0240] Furthermore, in this embodiment of the present application, M v Although the case where M is 2 is mainly used for explanation, it can also be applied to other cases. For example, v When is greater than 2, M vAssuming that N is 5, five consecutive candidate frequency domain components can be classified and combined to obtain six types of frequency domain components, and three bits are required for indication. The first type of frequency domain component set is {(0, 1, 2), (1, 2, 3), (2, 3, 4)}, i.e., three adjacent frequency domain components. The second type of frequency domain component set is {(0, 1, 3, (1, 2, 4)}, i.e., the first frequency domain component and the second frequency domain component are adjacent, and the second frequency domain component and the third frequency domain component are separated by one frequency domain component. The third type of frequency domain component set is {(0, 2, 3), (1, 3, 4)}, i.e., the first frequency domain component and the second frequency domain component are separated by one frequency domain component, and the second frequency domain component and the third frequency domain component are adjacent. The fourth type of frequency domain component set is {(0, 2, 4)}. The first type of frequency domain component set is {(0, 1, 4)}, i.e., three frequency domain components are separated by two frequency domain components. The fifth type of frequency domain component set is {(0, 1, 4)}, i.e., the first and second frequency domain components are adjacent, and the second and third frequency domain components are separated by three frequency domain components. The sixth type of frequency domain component set is {(0, 3, 4)}, i.e., the first and second frequency domain components are separated by three frequency domain components, and the second and third frequency domain components are adjacent.

[0241] The terminal device may report the index of the frequency domain component based on the codebook. fIn addition to reporting parameter information for the vth layer (used to determine W1), the terminal device may also report parameter information such as a selected port index (used to determine the aforementioned W1), quantized weighting factors (including the amplitude and phase of the weighting factors), and the position of each weighting factor among all non-zero coefficients (used to determine the aforementioned W2). The terminal device may separately indicate parameter information corresponding to the vth layer (flow). However, in some cases, the CSI feedback space allocated to the terminal device by the radio access network device may be insufficient, and as a result, some parameter information needs to be discarded. Therefore, in order to feedback parameter information with high importance in the limited CSI feedback space, the NR protocol specifies a priority for each parameter information reported in the UCI.

[0242] In the 3GPP Release R16 Technical Specification, the reporting priority of weighting factors (which is the reporting priority of amplitude, phase, and position of weighting factors in the codebook) may be indicated in the following format: Pri(v, i, f)=2·L·V·π(f)+V·i+v

[0243] A larger value of Pri(v,i,f) indicates a lower weighting factor priority.

[0244]

number

[0245] where l=1, 2, ..., V, i=0, 1, ..., 2L-1, and f=0, 1, ..., N-1, where v indicates the index of the number of layers, and the maximum index of the number of layers is V, i indicates the index of the port selected by the terminal device, and the number of ports is 2L, f indicates the index of the frequency domain component selected by the terminal device, the number of candidate frequency domain components is N, and the total number of frequency domain components is N3;

[0246]

number

[0247] is the index of the frequency domain component of the vth layer in the full set of frequency domain components (the DFT codebook matrix in which the frequency domain component is located) after the circular shift is performed.

[0248] The weighting coefficient corresponding to the smallest value of Pri(v, i, f) calculated by the above formula is the strongest coefficient.

[0249] In the technical specifications of 3GPP Release R16, the terminal device performs a circular shift on the full set of frequency domain components to move the strongest frequency domain component to a starting position, and the indication index of the corresponding frequency domain component becomes 0. Performing a circular shift on the full set of frequency domain components is equivalent to multiplying all frequency domain components in the full set by the same linear phase. In this way, the accuracy of the calculation of the precoding matrix can be guaranteed.

[0250] However, in the technical specifications of 3GPP Release R17, the terminal device does not perform a circular shift on the full set of frequency domain components. Therefore, when the weighting coefficient of a frequency domain component is the strongest coefficient, it is impossible to guarantee that the indication index corresponding to the strongest coefficient is 0, and it is impossible to guarantee that the priority is the highest.

[0251] Based on this, in this embodiment of the present application, the terminal device v The strongest non-zero coefficient among the weighting coefficients corresponding to the frequency domain components may be transmitted. The strongest non-zero coefficient has the highest priority. For example, the terminal device may report the strongest non-zero coefficient preferentially (or first) so that the strongest non-zero coefficient has the highest priority. The strongest non-zero coefficient may be carried in the UCI.

[0252] In the frequency domain component reporting method provided in this embodiment of the present application, the terminal device selects M from N candidate frequency domain components. v The frequency domain components are sometimes selected and shown as M v The indication information indicating the frequency domain components is

[0253]

number

[0254] occupies M bits, v is a positive integer less than N. Therefore, the feedback overhead of the frequency domain components can be reduced.

[0255] Hereafter, M by radio access network device v We now describe possible ways to set the value of

[0256] In the NR protocol, the terminal device has limited capability to support different codebooks. In this embodiment of the present application, the terminal device may transmit capability information of the terminal device to the radio access network device. The capability information of the terminal device includes a codebook combination supported by the terminal device, and the codebook combination is M v is used to determine the value of

[0257] The codebook combination includes one or more types of codebooks supported by the terminal device. For example, the terminal device may support up to three types of codebooks, and the codebook combination reported by the terminal device may be denoted as {Codebook 1, Codebook 2, Codebook 3} or Codebook 1-Codebook 2-Codebook 3. Optionally, for each codebook combination, the terminal device further reports triplet information {maximum number of ports for each resource, maximum number of resources, maximum total number of ports}. The maximum number of ports for each resource is the number of CSI-RS ports supported by each CSI-RS resource configured by the radio access network device for the terminal device, the maximum number of resources is the maximum number of CSI-RS resources supported by the terminal device, and the maximum total number of ports is the total number of ports supported by the terminal device on all CSI-RS resources. The maximum total number of ports supported by the terminal device is equal to or greater than the maximum number of ports for each resource multiplied by the maximum number of resources. In some cases, the radio access network device may also configure the maximum number of resources for the terminal device.

[0258] The radio access network device sends second indication information to the terminal device. v For example, the radio access network device may select a value of M from one or more types of codebooks supported by the terminal device. v A codebook of a type containing the parameters is selected, and then the M corresponding to that type of codebook is v Send the value of

[0259] Considering that the processing complexity of the terminal device is related to the port, the processing complexity of the terminal device is M v Optionally, the capability information of the terminal device is related to the value of M supported by the terminal device. vIn this way, the radio access network device can determine the maximum number of M supported by the terminal device. v From the maximum value of M v In other words, the value of M indicated by the second indication information is selected. v The value of M v The radio access network device shall not exceed the maximum value of M supported by the terminal device. v M for terminal devices based on the maximum value of v Since the value of ? is selected, the processing complexity of the terminal device can be reduced.

[0260] In a possible scheme, the terminal device may be configured with, for example, triplets and M v The maximum values ​​of the four resources are combined to form a quadruplet {maximum number of ports for each resource, maximum number of resources, maximum total number of ports, M v When reporting triplets, such as forming the maximum value of M v The processing complexity of the terminal device may be reported as a maximum of M v can be constrained by conveying a maximum value of

[0261] Currently, the technical specification of 3GPP Release R16 supports limited codebook types. In this embodiment of the present application, a new codebook type FeType2 is proposed, so that a terminal device can select a supported codebook type from more codebook types.

[0262] The terminal device adds the codebook type FeType2 to the codebook list combinations specified in the existing standard protocol, i.e., adds a codebook combination including FeType2. v The value information of M can enrich the selection range of codebook types, or the processing complexity of the terminal device can be reduced. vFor example, a codebook combination reported by a terminal device carrying the newly added codebook type FeType2 may be indicated in one or more of the following forms: type1SP-FeType2M v 1 - null, type1SP-FeType2M v 2 - null, type1SP-FeType2-null, type1SP-eType2R1-FeType2M v 1. type1SP-eType2R2-FeType2M v 1. type1SP-eType2R1-FeType2M v 2. type1SP-eType2R2-FeType2M v 2. type1SP-eType2R1-FeType2, type1SP-eType2R2-FeType2, type1MP-FeType2M v 1 - null, type1MP-FeType2M v 2 - null, type1MP-FeType2-null, type1MP-eType2R1-FeType2M v 1. type1MP-eType2R2-FeType2M v 1. type1MP-eType2R1-FeType2M v 2. type1MP-eType2R2-FeType2M v 2. type1MP-eType2R1-FeType2, or type1MP-eType2R2-FeType2.

[0263] SP stands for single panel, and MP stands for multi-panel. v 1 is M v indicates that the value of is 1, and M v 2 is M v indicates that the value of is 2. E indicates enhanced, and Fe indicates further enhanced. R1 indicates that each subband CQI corresponds to one subband PMI, and R2 indicates that each subband CQI corresponds to two subband PMIs. Null is empty, which means that the terminal device supports another (non-null) codebook type in the codebook combination.

[0264] The codebook combinations transmitted by the terminal device and M v After receiving the optional value range of M, the radio access network device v In a possible scheme, the third indication information may determine the value of M by indicating the selected codebook type. v For example, the third indication information indicates the codebook type FeType2M. v 1 indicates the M supported by the terminal device in the FeType2 type codebook. v In another example, the third indication information indicates that the codebook type FeType2M v 2 indicates the M supported by the terminal device in the FeType2 type codebook. v In another example, the third indication information indicates that the codebook type is FeType2, and indicates that the terminal device uses M in the codebook of FeType2 type. v This indicates that all possible values ​​of are supported by default.

[0265] Based on the same technical concept as the above frequency domain component reporting method, an embodiment of the present application further provides a communication device. As shown in Fig. 5, the communication device 500 includes a processing unit 501 and a transceiver unit 502. The communication device 500 may be configured to implement the method described in the above method embodiment. The device 500 may be used in or located within a terminal device or a radio access network device.

[0266] In a possible embodiment, the apparatus 500 is a terminal device.

[0267] For example, the processing unit 501 may v is configured to determine M frequency domain components. v The frequency domain components are a subset of the N candidate frequency domain components, and M v is a positive integer, and N is M v is a positive integer greater than zero.

[0268] The transceiver unit 502 is configured to transmit a first indication information. The first indication information is M v the first indication information indicates frequency domain components,

[0269]

number

[0270] It occupies bits.

[0271] In one implementation, M v is 2.

[0272] In one implementation, N is one of 3, 4, or 5.

[0273] In one implementation, the N candidate frequency domain components include multiple types of frequency domain component sets, and frequency domain component subsets in the same type of frequency domain component set are equivalent in the reconstruction of the precoding matrix by the radio access network device, and each frequency domain component set is one of M v It contains frequency domain components.

[0274] In one implementation, when N is 3, The first indication information indicates two frequency domain components using one bit, one of which is a frequency domain component at a start position or an end position of the N candidate frequency domain components. The first indication information indicates two frequency domain components using one bit, one of which is a frequency domain component of a specified value; or The first indication information indicates each type of frequency domain component set using one bit.

[0275] In one implementation, when N is 4 or 5, The first indication information indicates two frequency domain components using two bits, one of which is a frequency domain component at a start position or an end position of the N candidate frequency domain components. The first indication information indicates two frequency domain components using two bits, one of which is a frequency domain component of a specified value; or The first indication information indicates each type of frequency domain component set using two bits.

[0276] In one implementation, the first indication information is carried in precoding matrix indication information.

[0277] In one implementation, the first indication information is carried in PMI information, and the PMI information is carried in UCI.

[0278] In one implementation, the transceiver unit 502 includes vThe weighting coefficients corresponding to the frequency domain components are further configured to transmit the strongest non-zero coefficient among the weighting coefficients corresponding to the frequency domain components, the strongest non-zero coefficient having the highest priority.

[0279] In another example, the transceiver unit 502 is configured to report capability information of a terminal device, where the capability information of the terminal device includes a codebook combination supported by the terminal device, and the codebook combination is M v The second indication information is used to determine the value of M, and the transceiver unit 502 is configured to receive the second indication information. v Indicates the value of

[0280] The processing module 501 is v is configured to determine the value of

[0281] In one implementation, the capability information of the terminal device is a list of MCUs supported by the terminal device. v and the maximum value of M indicated by the second indication information. v The value of M v is less than or equal to the maximum value of

[0282] In one implementation, the codebook combination is type1SP-FeType2M v 1-null, type1SP-FeType2M v 2-null, type1SP-FeType2-null, type1SP-eType2R1-FeType2M v 1. Type 1 SP-e Type 2 R2-Fe Type 2 M v 1. Type 1 SP-e Type 2 R1-Fe Type 2 M v 2. Type 1 SP-e Type 2 R2-Fe Type 2 M v 2, type1SP-eType2R1-FeType2, type1SP-eType2R2-FeType2, type1MP-FeType2M v 1-null, type1MP-FeType2M v2-null, type1MP-FeType2-null, type1MP-eType2R1-FeType2M v 1. Type1MP-eType2R2-FeType2M v 1. Type1MP-eType2R1-FeType2M v 2. Type1MP-eType2R2-FeType2M v 2, type1MP-eType2R1-FeType2, or type1MP-eType2R2-FeType2.

[0283] In another possible embodiment, the apparatus 500 is a radio access network device.

[0284] For example, the transceiver unit 502 is configured to receive first indication information. The first indication information is M v denote the frequency domain components, and M v the frequency domain components are a subset of the N candidate frequency domain components, and the first indication information is

[0285]

number

[0286] occupies M bits, v is a positive integer, and N is M v is a positive integer greater than zero.

[0287] The processing unit 501 is v The method is configured to determine frequency domain components.

[0288] In one implementation, M v is 2.

[0289] In one implementation, N is one of 3, 4, or 5.

[0290] In one implementation, the N candidate frequency domain components include multiple types of frequency domain component sets, and frequency domain component subsets in the same type of frequency domain component set are equivalent in the reconstruction of the precoding matrix by the radio access network device, and each frequency domain component subset is one of M v It contains frequency domain components.

[0291] In one implementation, when N is 3, The first indication information indicates two frequency domain components using one bit, one of which is a frequency domain component at a start position or an end position of the N candidate frequency domain components. The first indication information indicates two frequency domain components using one bit, one of which is a frequency domain component of a specified value; or The first indication information indicates each type of frequency domain component set using one bit.

[0292] In one implementation, when N is 4 or 5, The first indication information indicates two frequency domain components using two bits, one of which is a frequency domain component at a start position or an end position of the N candidate frequency domain components. The first indication information indicates two frequency domain components using two bits, one of which is a frequency domain component of a specified value; or The first indication information indicates each type of frequency domain component set using two bits.

[0293] In one implementation, the first indication information is carried in precoding matrix indication information.

[0294] In one implementation, the first indication information is carried in PMI information, and the PMI information is carried in UCI.

[0295] In one implementation, the transceiver unit 502 includes vThe weighting coefficients corresponding to the frequency domain components are further configured to receive a strongest non-zero coefficient among the weighting coefficients corresponding to the frequency domain components, the strongest non-zero coefficient having the highest priority.

[0296] In another example, the transceiver unit 502 is configured to receive capability information of a terminal device. The capability information of the terminal device includes a codebook combination supported by the terminal device, and the codebook combination is M v is used to determine the value of

[0297] The processing module 501 is v is configured to determine the value of

[0298] The transceiver unit 502 is further configured to transmit second indication information. The second indication information is M v Indicates the value of

[0299] In one implementation, the capability information of the terminal device is a list of MCUs supported by the terminal device. v and the maximum value of M indicated by the second indication information. v The value of M v is less than or equal to the maximum value of

[0300] In one implementation, the codebook combination is type1SP-FeType2M v 1-null, type1SP-FeType2M v 2-null, type1SP-FeType2-null, type1SP-eType2R1-FeType2M v 1. Type 1 SP-e Type 2 R2-Fe Type 2 M v 1. Type 1 SP-e Type 2 R1-Fe Type 2 M v 2. Type 1 SP-e Type 2 R2-Fe Type 2 M v 2, type1SP-eType2R1-FeType2, type1SP-eType2R2-FeType2, type1MP-FeType2M v1-null, type1MP-FeType2M v 2-null, type1MP-FeType2-null, type1MP-eType2R1-FeType2M v 1. Type1MP-eType2R2-FeType2M v 1. Type1MP-eType2R1-FeType2M v 2. Type1MP-eType2R2-FeType2M v 2, type1MP-eType2R1-FeType2, or type1MP-eType2R2-FeType2.

[0301] It should be noted that in the embodiments of the present application, the division into modules is merely an example and represents a logical division of functions. In actual implementation, other division schemes may be used. Furthermore, the functional units in the embodiments of the present application may be integrated into one processing module, may exist physically independent, or two or more units may be integrated into one module. The integrated units may be implemented in the form of hardware or in the form of software functional units.

[0302] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, the integrated unit may be stored in a computer-readable storage medium. Based on this understanding, the integrated unit may be stored in a storage medium as a computer software product, and includes several instructions that enable a computer device (which may be a personal computer, a server, or a wireless access network device) or a processor to execute all or part of the steps of the method of the embodiments of the present application.

[0303] As shown in Figure 6, the embodiment of the present application further provides a schematic diagram of the structure of a communication device 600. The communication device 600 may be configured to implement the method described in the above method embodiment. For details, please refer to the description of the above method embodiment.

[0304] The device 600 includes one or more processors 601. The processor 601 may be a general-purpose processor or a special-purpose processor, etc. For example, the processor may be a baseband processor or a central processing unit. The baseband processor may be configured to process communication protocols and communication data. The central processing unit may be configured to control a communication device (e.g., a base station, a terminal, or a chip), execute software programs, and process data of the software programs. The communication device may include a transceiver unit configured to input (receive) and output (transmit) signals. For example, the transceiver unit may be a transceiver or a radio frequency chip.

[0305] The apparatus 600 includes one or more processors 601, which may implement the methods of the above embodiments.

[0306] Optionally, the processor 601 may not only perform the methods of the above embodiments, but also further perform other functions.

[0307] Optionally, in one design, processor 601 executes instructions to cause device 600 to perform the methods described in the method embodiments above. All or a portion of the instructions may be stored in the processor, e.g., instructions 603, or may be stored in memory 602 coupled to the processor, e.g., instructions 604. Instructions 603 and 604 may alternatively be used together to enable communications device 600 to perform the methods described in the method embodiments above. Instructions 603 may also be referred to as a computer program.

[0308] In another possible design, the communications device 600 may further include circuitry that may perform the functions in the above method embodiments.

[0309] In another possible design, the device 600 may include one or more memories 602 that store instructions 604. The instructions may be executed on the processor to cause the device 600 to perform the method described in the above method embodiments. Optionally, the memory may further store data. Optionally, the processor may store instructions and / or data. For example, the one or more memories 602 may store the correspondence described in the above embodiments, or related parameters or tables in the above embodiments, etc. The processor and memory may be located separately or integrated with each other.

[0310] In another possible design, the apparatus 600 may further include a transceiver 605 and an antenna 606. The processor 601 may also be called a processing unit and is configured to control the apparatus (terminal or base station). The transceiver 605 may also be called a transceiver, transceiver circuit, transceiver unit, etc. and is configured to perform transceiver functions of the apparatus using the antenna 606.

[0311] The processor may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), one or more integrated circuits configured to control program execution of the solutions of the present application, a general-purpose processor, a digital signal processor (DSP), a field programmable gate array (FPGA) or another programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. It may implement or perform the methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor, and the processor may be any conventional processor, etc. The steps of the methods disclosed with reference to the embodiments of the present application may be executed and performed directly using a hardware decoding processor, or may be executed and performed using a combination of hardware and software modules in the decoding processor. The software modules may be in a storage medium, and the storage medium is located in a memory.

[0312] The memory may be volatile or nonvolatile, or may include both volatile and nonvolatile memory. Nonvolatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory may be random access memory (RAM) used as an external cache. By way of example and not limitation, many forms of RAM may be used, such as static random access memory (Static RAM, SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), Synchlink dynamic random access memory (Synchlink DRAM, SLDRAM), and direct Rambus random access memory (Direct Rambus RAM, DR RAM). Note that the memory of the systems and methods described herein includes, but is not limited to, these memories and any other suitable type of memory. The memory may exist independently or be connected to the processor via a communication line. Alternatively, the memory may be integrated into the processor.

[0313] It may be understood that the structure of Figure 7 is not a specific limitation for the terminal device and the radio access network device. In some other embodiments of the present application, the terminal device or the radio access network device may include more or fewer components than those shown in this figure, may combine some components, may separate some components, or may have a different arrangement of components. The components shown in this figure may be implemented by hardware, software, or a combination of software and hardware.

[0314] An embodiment of the present application further provides a computer-readable medium, which stores a computer program, which, when executed by a computer, implements the frequency-domain component reporting method of any one of the above method embodiments.

[0315] An embodiment of the present application further provides a computer program product including a computer program, which, when executed by a computer, implements the frequency domain component reporting method of any one of the above method embodiments.

[0316] An embodiment of the present application further provides a communication system, including a terminal device and a radio access network device, wherein the terminal device and the radio access network device may implement the frequency domain component reporting method of any one of the above method embodiments.

[0317] All or part of the above embodiments may be implemented by software, hardware, firmware, or any combination thereof. When software is used to implement the embodiments, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded into a computer and executed, the procedures or functions according to the embodiments of the present application are generated in whole or in part. The computer may be the above-mentioned communication device. The computer instructions may be stored in a computer-readable storage medium or transmitted from a computer-readable storage medium to another computer-readable storage medium. The computer-readable storage medium may be the above-mentioned storage medium or the above-mentioned memory.

[0318] In a possible design, when the communication device is a chip, such as a chip in a radio access network device or a terminal device, the decision unit or processor 601 may be one or more logic circuits, and the transmitting or receiving unit or transceiver 605 may be an input / output interface, or may be referred to as a communication interface, interface circuit, interface, or the like. Alternatively, the transceiver 605 may be a transmitting unit and a receiving unit. The transmitting unit may be an output interface, and the receiving unit may be an input interface. The transmitting unit and the receiving unit are integrated into one unit, such as an input / output interface. As shown in FIG. 7, the communication device 700 includes a logic circuit 701 and an interface circuit 702. That is, the decision unit or processor 601 may be implemented using the logic circuit 701, and the transmitting or receiving unit or transceiver 605 may be implemented using the interface circuit 702. The logic circuit 701 may be a chip, a processing circuit, an integrated circuit, or a system on chip (SoC), etc., and the interface circuit 702 may be a communication interface or an input / output interface, etc. In this embodiment of the present application, the logic circuit may be further coupled to an interface. The specific connection manner between the logic circuit and the interface is not limited in this embodiment of the present application.

[0319] In some embodiments of the present application, the logic circuits and interface circuits may be configured to perform functions or operations, etc., performed by a radio access network device or a terminal device.

[0320] For example, the logic circuit 701 is v The method is configured to determine frequency domain components.

[0321] The interface circuit 702 is configured to transmit a first indication information. The first indication information is Mv the first indication information indicates frequency domain components,

[0322]

number

[0323] It occupies bits.

[0324] For the functions or operations performed by the radio access network device or the terminal device, please refer to the above method embodiments, and details will not be repeated here.

[0325] Those skilled in the art may recognize that, in combination with the examples described in the embodiments disclosed herein, the units and algorithm steps can be implemented by electronic hardware, computer software, or a combination thereof. In order to clearly explain the compatibility between hardware and software, the above generally describes the components and steps of each example based on their functions. Whether a function is performed by hardware or software depends on the individual application and design constraints of the technical solution. Those skilled in the art may implement the described functions using different methods for each individual application field, but these implementations shall be considered within the scope of the present application.

[0326] For convenience and ease of description, those skilled in the art can clearly understand that the detailed operation processes of the above systems, devices and units can be referred to the corresponding processes of the above method embodiments, and the details will not be repeated in this specification.

[0327] In some embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the described device embodiments are merely examples. For example, the division into units may merely be a logical division of functionality, and actual implementation may involve other divisions. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not implemented. Furthermore, the shown or described mutual couplings or direct couplings or communication connections may be implemented through some interfaces, indirect couplings or communication connections between devices or units, or electrical, mechanical, or other forms of connection.

[0328] The units described as separate parts may or may not be physically separate, and the parts shown as units may or may not be physical units, in other words, they may be located in one place or distributed over multiple network units. Some or all of these units may be selected according to actual requirements to achieve the objectives of the solutions of the embodiments of the present application.

[0329] Furthermore, the functional units in the embodiments of the present application may be integrated into one processing unit, each unit may exist physically independently, or two or more units may be integrated into one unit. The integrated unit may be implemented in the form of hardware or in the form of a software functional unit.

[0330] With the above implementation description, those skilled in the art can clearly understand that the present application can be implemented by hardware, firmware, or a combination thereof. When the present invention is implemented by software, the above functions can be stored on a computer-readable medium or transmitted as one or more instructions or codes in a computer-readable medium. Computer-readable media include computer storage media and communication media. Communication media include any medium that allows a computer program to be transmitted from one place to another. Storage media can be any available medium accessible by a computer.

[0331] In summary, what has been described above is merely an embodiment of the technical solution of the present application, and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, or improvement made without departing from the principle of the present application shall fall within the protection scope of the present application.

Claims

1. 1. A frequency domain component reporting method, comprising: By the communication device, v A step of obtaining frequency domain components (S401), v The frequency domain components are a subset of N consecutive candidate frequency domain components, v One of the frequency domain components is a frequency domain component at a starting position of the N consecutive candidate frequency domain components, and the starting position of the N consecutive candidate frequency domain components is a frequency domain component at a starting position of the N consecutive candidate frequency domain components. 3 are the starting positions of the candidate frequency domain components, and M v is a positive integer, and N is M v is a positive integer greater than N 3 is the number of frequency domain resource blocks (RB) resources or the number of subbands in the bandwidth portion (BWP) supported by the communication device; A step (S402) of transmitting first display information by the communication device, wherein the first display information is v the first display information indicates frequency domain components, [Equation 1] bits, and A frequency domain component reporting method comprising:

2. M v The method of claim 1, wherein is 2.

3. 3. The method of claim 1, wherein when N is 4, the first indication information indicates two selected frequency domain components using two bits.

4. When the value of the two bits is 00, the first indication information indicates that the reported frequency domain component is 1; When the value of the two bits is 01, the first indication information indicates that the reported frequency domain component is 2; The method of claim 3 , wherein when the value of the two bits is 10, the first indication information indicates that the reported frequency domain component is 3.

5. By the communication device, M v Prior to the step of obtaining frequency domain components, the method further comprises: reporting, by the communication device, capability information of the communication device, wherein the capability information of the communication device includes codebook combinations supported by the communication device, the codebook combinations being v a step used to determine the value of receiving, by the communication device, second display information, v indicating said value of The method of claim 1 further comprising:

6. The capability information of the communication device is v and the maximum value of M indicated by the second display information is further included. v The value of M v 6. The method of claim 5, wherein the maximum value is less than or equal to .

7. The codebook combination is type1SP-FeType2M v 1-null, type1SP-FeType2M v 2-null, type1SP-FeType2-null, type1SP-eType2R1-FeType2M v 1, type1SP-eType2R2-FeType2M v 1, type1SP-eType2R1-FeType2M v 2, type1SP-eType2R2-FeType2M v 2, type1SP-eType2R1-FeType2, type1SP-eType2R2-FeType2, type1MP-FeType2M v 1-null, type1MP-FeType2M v 2-null, type1MP-FeType2-null, type1MP-eType2R1-FeType2M v 1, type1MP-eType2R2-FeType2M v 1, type1MP-eType2R1-FeType2M v 2, type1MP-eType2R2-FeType2M v 7. The method of claim 5 or 6, comprising one or more of type 1MP-eType2R1-FeType2, type 1MP-eType2R2-FeType2, or type 1MP-eType2R2-FeType2.

8. 1. A frequency domain component reporting method, comprising: A step of receiving first display information by a communication device (S402), wherein the first display information is M v number of frequency domain components, v The frequency domain components are a subset of N consecutive candidate frequency domain components, v One of the frequency domain components is a frequency domain component at a starting position of the N consecutive candidate frequency domain components, and the starting position of the N consecutive candidate frequency domain components is a frequency domain component at a starting position of the N consecutive candidate frequency domain components. 3 the start positions of the candidate frequency domain components, and the first display information is [Equation 2] bits, and M v is a positive integer, and N is M v is a positive integer greater than N 3 is the number of frequency domain resource block (RB) resources or the number of subbands in a bandwidth portion (BWP) supported by a terminal device; The communication device v determining frequency domain components; A frequency domain component reporting method comprising:

9. M v The method of claim 8, wherein is 2.

10. 10. The method of claim 8 or 9, wherein when N is 4, the first indication information indicates two selected frequency domain components using two bits.

11. When the value of the two bits is 00, the first indication information indicates that the reported frequency domain component is 1; When the value of the two bits is 01, the first indication information indicates that the reported frequency domain component is 2; The method of claim 10, wherein when the value of the two bits is 10, the first indication information indicates that the reported frequency domain component is 3.

12. The method according to claim 1, further comprising the steps of: receiving, by the communication device, first display information; receiving, by the communication device, capability information of the terminal device, wherein the capability information of the terminal device includes codebook combinations supported by the terminal device, and the codebook combinations are v a step used to determine the value of a step of transmitting second display information by the communication device, the second display information being M v indicating said value of The method of claim 8 further comprising:

13. The capability information of the terminal device is a M supported by the terminal device. v and the maximum value of M indicated by the second display information is further included. v The value of M v 13. The method of claim 12, wherein the maximum value is less than or equal to .

14. The codebook combination is type1SP-FeType2M v 1-null, type1SP-FeType2M v 2-null, type1SP-FeType2-null, type1SP-eType2R1-FeType2M v 1, type1SP-eType2R2-FeType2M v 1, type1SP-eType2R1-FeType2M v 2, type1SP-eType2R2-FeType2M v 2, type1SP-eType2R1-FeType2, type1SP-eType2R2-FeType2, type1MP-FeType2M v 1-null, type1MP-FeType2M v 2-null, type1MP-FeType2-null, type1MP-eType2R1-FeType2M v 1, type1MP-eType2R2-FeType2M v 1, type1MP-eType2R1-FeType2M v 2, type1MP-eType2R2-FeType2M v 2, type 1MP-eType2R1-FeType2, or type 1MP-eType2R2-FeType2.

15. A communication device, M v a processing unit (501) configured to obtain M frequency domain components, v The frequency domain components are a subset of N consecutive candidate frequency domain components, v One of the frequency domain components is a frequency domain component at a starting position of the N consecutive candidate frequency domain components, and the starting position of the N consecutive candidate frequency domain components is a frequency domain component at a starting position of the N consecutive candidate frequency domain components. 3 are the starting positions of the candidate frequency domain components, and M v is a positive integer, and N is M v is a positive integer greater than N 3 is the number of frequency domain resource block (RB) resources or the number of subbands in a bandwidth portion (BWP) supported by the communication device; and a transceiver unit (502) configured to transmit first indication information, said first indication information being v the first display information indicates frequency domain components, [Equation 3] a transceiver unit occupying bits; A communication device comprising:

16. M v 16. The communication device according to claim 15, wherein is 2.

17. 17. The communication device according to claim 15, wherein when N is 4, the first indication information indicates two selected frequency domain components using two bits.

18. When the value of the two bits is 00, the first indication information indicates that the reported frequency domain component is 1; When the value of the two bits is 01, the first indication information indicates that the reported frequency domain component is 2; The communication device of claim 17, wherein when the value of the two bits is 10, the first indication information indicates that the reported frequency domain component is 3.

19. The transceiver unit (502) is further configured to report capability information of the communication device, the capability information of the communication device including codebook combinations supported by the communication device, the codebook combinations being M v is used to determine a value of M, and the transceiver unit is further configured to receive second indication information, the second indication information being v 16. The communication device of claim 15, wherein the value of

20. The capability information of the communication device is v and the maximum value of M indicated by the second display information is further included. v The value of M v 20. The communication device of claim 19, wherein the maximum value is less than or equal to .

21. The codebook combination is type1SP-FeType2M v 1-null, type1SP-FeType2M v 2-null, type1SP-FeType2-null, type1SP-eType2R1-FeType2M v 1, type1SP-eType2R2-FeType2M v 1, type1SP-eType2R1-FeType2M v 2, type1SP-eType2R2-FeType2M v 2, type1SP-eType2R1-FeType2, type1SP-eType2R2-FeType2, type1MP-FeType2M v 1-null, type1MP-FeType2M v 2-null, type1MP-FeType2-null, type1MP-eType2R1-FeType2M v 1, type1MP-eType2R2-FeType2M v 1, type1MP-eType2R1-FeType2M v 2, type1MP-eType2R2-FeType2M v 21. The communications device of claim 19 or 20, including one or more of type 1MP-eType2R1-FeType2, type 1MP-eType2R2-FeType2, or type 1MP-eType2R2-FeType2.

22. a transceiver unit (502) configured to receive first indication information, said first indication information being M v number of frequency domain components, v The frequency domain components are a subset of N consecutive candidate frequency domain components, v One of the frequency domain components is a frequency domain component at a starting position of the N consecutive candidate frequency domain components, and the starting position of the N consecutive candidate frequency domain components is a frequency domain component at a starting position of the N consecutive candidate frequency domain components. 3 the start positions of the candidate frequency domain components, and the first display information is [Equation 4] bits, and M v is a positive integer, and N is M v is a positive integer greater than N 3 is the number of frequency domain resource block (RB) resources or the number of subbands in a bandwidth portion (BWP) supported by the terminal device; and Said M v a processing unit (501) configured to determine frequency domain components; A communication device comprising:

23. M v 23. The communication device of claim 22, wherein is 2.

24. 24. The communication device according to claim 22 or 23, wherein when N is 4, the first indication information indicates two selected frequency domain components using two bits.

25. When the value of the two bits is 00, the first indication information indicates that the reported frequency domain component is 1; When the value of the two bits is 01, the first indication information indicates that the reported frequency domain component is 2; The communication device of claim 24, wherein when the value of the two bits is 10, the first indication information indicates that the reported frequency domain component is 3.

26. The transceiver unit is further configured to receive capability information of the terminal device, the capability information of the terminal device including codebook combinations supported by the terminal device, and the codebook combinations are v is used to determine a value of M, and the transceiver unit is further configured to transmit second indication information, the second indication information being v 23. The communication device of claim 22, wherein the value of

27. The capability information of the terminal device is a M supported by the terminal device. v and the maximum value of M indicated by the second display information is further included. v The value of M v 27. The communication device of claim 26, wherein the maximum value is less than or equal to .

28. The codebook combination is type1SP-FeType2M v 1-null, type1SP-FeType2M v 2-null, type1SP-FeType2-null, type1SP-eType2R1-FeType2M v 1, type1SP-eType2R2-FeType2M v 1, type1SP-eType2R1-FeType2M v 2, type1SP-eType2R2-FeType2M v 2, type1SP-eType2R1-FeType2, type1SP-eType2R2-FeType2, type1MP-FeType2M v 1-null, type1MP-FeType2M v 2-null, type1MP-FeType2-null, type1MP-eType2R1-FeType2M v 1, type1MP-eType2R2-FeType2M v 1, type1MP-eType2R1-FeType2M v 2, type1MP-eType2R2-FeType2M v 28. A communications device according to claim 26 or 27, comprising one or more of type 1MP-eType2R1-FeType2, type 1MP-eType2R2-FeType2, or type 1MP-eType2R2-FeType2.

29. A communications device including at least one processor, the at least one processor configured with processor-executable instructions to perform the method of claim 1.

30. A communications device including at least one processor, said at least one processor configured with processor-executable instructions for performing the method of claim 8.

31. A communication device including a logic circuit and an interface circuit, the interface circuit is configured to communicate with a module other than the communication device; 10. A communication device, wherein the logic circuitry is configured to execute a computer program to enable the communication device to perform the method of claim 1.

32. A communication device including a logic circuit and an interface circuit, the interface circuit is configured to communicate with a module other than the communication device; 9. A communications device, wherein the logic circuitry is configured to execute a computer program to enable the communications device to perform the method of claim 8.

33. A computer-readable storage medium containing a computer program, which when run on a computer, performs the method of claim 1.

34. A computer readable storage medium containing a computer program, which when run on a computer, performs the method of claim 8.

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