WO2023125221A1

WO2023125221A1 - Channel quality indication reporting method and apparatus

Info

Publication number: WO2023125221A1
Application number: PCT/CN2022/140957
Authority: WO
Inventors: 丁洋; 李胜钰; 李锐杰; 官磊
Original assignee: 华为技术有限公司
Priority date: 2021-12-30
Filing date: 2022-12-22
Publication date: 2023-07-06
Also published as: CN116419307A

Abstract

Embodiments of the present application provide a CQI reporting method and apparatus. A base station instructs, by means of configuration information, a terminal to report CQI corresponding to the number of M antenna ports in a compression manner, and the terminal reports, to the base station by means of a physical channel, the CQI corresponding to the number of M antenna ports, so that overhead of CQI reporting can be effectively reduced, thereby improving system performance.

Description

Method and device for reporting channel quality indication

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office of China on December 30, 2021, with the application number 202111655579.1, and the title of the application is "A Method and Device for Reporting Channel Quality Indication", the entire contents of which are incorporated by reference incorporated in this application.

technical field

The embodiments of the present application relate to the field of wireless communication, and in particular to a method and device for reporting a channel quality indicator.

Background technique

In the process of wireless communication, the base station can send a reference signal to the terminal, and the terminal measures the reference signal, maps the measured channel quality information to a channel quality indicator (CQI) and reports it to the base station, so that the base station can use the CQI Perform data scheduling.

With the evolution of cellular communication technology, the frequency spectrum used is getting wider and wider, the number of transmitting antennas of the base station is increasing, and the power consumption of the base station is getting higher and higher. For this reason, the researchers propose a method of dynamically turning off part of the transmitting antennas to achieve the purpose of saving base station power. When some antennas of the base station are turned off, the number of antennas used by the base station for sending reference signals also decreases.

In the scenario where the number of base station antennas changes dynamically, how to report the CQI is an urgent technical problem to be solved.

Contents of the invention

In order to reduce CQI reporting overhead, the embodiments of the present application provide a CQI reporting method and device.

In a first aspect, the embodiment of the present application provides a method for reporting a CQI. The method includes: the terminal receives configuration information from the base station through radio resource control RRC signaling, and the configuration information instructs the terminal to report CQIs of M types of antenna port numbers, where M is an integer greater than 1; the terminal receives a reference signal from the base station, and Channel measurement is performed according to the reference signal; the terminal uses a compression method to report the CQI corresponding to the number of M antenna ports to the base station through a physical channel. By reporting the CQI in a compressed manner, the overhead of the CQI report can be reduced and the system performance can be improved.

In a possible implementation, the terminal uses a compressed method to report the CQI corresponding to the number of M antenna ports to the base station, specifically including: using P bits to indicate the broadband CQI corresponding to the number of reference ports N _ref ; using P1 bits to indicate the number of ports N1 The corresponding wideband differential CQI value; wherein, the wideband differential CQI value is quantified according to the wideband offset level, and the wideband offset level is equal to the wideband CQI index corresponding to the port number N1 minus the wideband CQI index corresponding to the port number N _ref , Wherein, P1 and P are positive integers, P1 is smaller than P, N _ref and N1 are positive integers, N1 is not equal to N _ref , and both N _ref and N1 are one of the above M types of antenna port numbers. The wideband CQI corresponding to the number of ports other than the number of reference ports is fed back in a differential manner, thereby effectively reducing the overhead of the CQI report and improving performance.

In a possible implementation, the terminal reports the CQI corresponding to the number of M antenna ports to the base station in a compressed manner, which specifically includes: using the Q1 bit to indicate the subband differential CQI value corresponding to the reference port number N _ref ; using the Q2 bit Indicates the subband differential CQI value corresponding to the port number N1; where the subband differential CQI value is quantified according to the subband offset level, and the subband offset level is equal to the subband CQI index corresponding to the port number N2 minus the port number is the wideband CQI index corresponding to N2, N2 is equal to N1 or N _ref , Q1 is a positive integer less than P, Q2 is less than or equal to Q1, and Q2 is less than or equal to P1. Feedback sub-band CQI in a differential manner can effectively reduce the overhead of CQI reporting and improve performance.

In a possible implementation, the terminal reports the CQI corresponding to the number of M antenna ports to the base station in a compressed manner, specifically including: using 4 bits to indicate the broadband CQI corresponding to the number of reference ports N _ref , and using 2 bits to indicate the number of reference ports The sub-band differential CQI value corresponding to N _ref ; use 2 bits to indicate the wideband differential CQI value corresponding to the port number N1, and use 2 bits to indicate the sub-band differential CQI value corresponding to the port number N1.

In a possible implementation, the terminal uses a compressed method to report the CQI corresponding to the number of M antenna ports to the base station, specifically including: using 4 bits to indicate the broadband CQI corresponding to the number of reference ports N _ref , and using 1 bit to indicate the number of reference ports The sub-band differential CQI value corresponding to N _ref ; use 2 bits to indicate the wideband differential CQI value corresponding to the port number N1, and use 1 bit to indicate the sub-band differential CQI value corresponding to the port number N1.

In a possible implementation manner, the above number of reference ports may be predefined by the protocol, or may be notified by the base station to the terminal through RRC signaling.

In a possible implementation manner, the configuration information further instructs the terminal to report the CQI in a compressed manner. Optionally, the configuration information may include a compressed feedback indication, indicating that the CQI is fed back in a compressed manner.

In a possible implementation, the above configuration information also includes a CSI-ReportConfig information element, and there is an option in the reportQuantity information element in the CSI-ReportConfig information element, instructing the terminal to report 1-port CQI, 2-port CQI, ... ..., CQIs corresponding to M different numbers of ports among the N-port CQIs.

In a possible implementation, the terminal sends capability information to the base station, the capability information indicates the number of CSI processing units that the terminal needs to use to measure and report CSI with M types of antenna ports, and the CQI in the CSI is compressed according to the above reported in a manner.

In a second aspect, the embodiment of the present application provides a CQI reporting method. The method includes: the base station sends configuration information to the terminal through radio resource control RRC signaling, and the configuration information instructs the terminal to report CQIs of M types of antenna ports, where M is an integer greater than 1; the base station sends a reference signal to the terminal; the base station receives The CQI corresponding to the number of M antenna ports from the terminal, where the CQI is carried on a physical channel in a compressed manner.

In a possible implementation, the CQI is carried on a physical channel in a compressed manner, which is characterized in that: the broadband CQI corresponding to the reference port number N _ref is indicated by P bits; the broadband CQI corresponding to the port number N1 The differential CQI value is indicated by the P1 bit; among them, the wideband differential CQI value is quantified according to the wideband offset level, and the wideband offset level is equal to the wideband CQI index corresponding to the port number N1 minus the wideband index corresponding to the port number N _ref CQI index, wherein, P1 and P are positive integers, P1 is smaller than P, N _ref and N1 are positive integers, N1 is not equal to N _ref , and N _ref and N1 are one of the above M types of antenna port numbers.

In a possible implementation, the CQI is carried on a physical channel in a compressed manner, which is characterized in that: the subband differential CQI value corresponding to the reference port number N _ref is indicated by the Q1 bit; the port number N1 The corresponding subband differential CQI value is indicated by the Q2 bit; wherein, the subband differential CQI value is quantified according to the subband offset level, and the subband offset level is equal to the subband CQI index corresponding to the port number N2 minus The port number is the wideband CQI index corresponding to N2, N2 is equal to N1 or N _ref , Q1 is a positive integer less than P, Q2 is less than or equal to Q1, and Q2 is less than or equal to P1.

In a possible implementation, the CQI is carried on a physical channel in a compressed manner, which is characterized in that: the wideband CQI corresponding to the reference port number N _ref is indicated by 4 bits, and the reference port number N _ref corresponds to The subband differential CQI value of is indicated by 2 bits; the wideband differential CQI value corresponding to the port number N1 is indicated by 2 bits, and the subband differential CQI value corresponding to the port number N1 is indicated by 2 bits.

In a possible implementation, the CQI is carried on a physical channel in a compressed manner, which is characterized in that: the wideband CQI corresponding to the reference port number N _ref is indicated by 4 bits, and the reference port number N _ref corresponds to The subband differential CQI value corresponding to the port number N1 is indicated by 1 bit; the wideband differential CQI value corresponding to the port number N1 is indicated by 2 bits, and the subband differential CQI value corresponding to the port number N1 is indicated by 1 bit.

In a possible implementation manner, the aforementioned number of reference ports may be predefined by a protocol.

In a possible implementation manner, the base station indicates the number of reference ports to the terminal through RRC signaling.

In a possible implementation manner, the above configuration information also instructs the terminal to report the CQI in a compressed manner.

In a possible implementation manner, the above configuration information also instructs the terminal to report the CQI in a compressed manner. Optionally, the above configuration information may include a compressed feedback indication, indicating that the CQI is fed back in a compressed manner.

In a possible implementation, the base station receives capability information from the terminal, the capability information indicates the number of CSI processing units that the terminal needs to use to measure and report CSI with M types of antenna ports, and the CQI in the CSI is calculated according to The above-mentioned compressed method is reported.

In a third aspect, the embodiment of the present application provides a communication device, and the device may be a terminal, and may also be a chip for the terminal. The device has the function of realizing the first aspect or the terminal in any one of the implementation manners of the first aspect. This function may be implemented by hardware, or may be implemented by executing corresponding software on the hardware. The hardware or software includes one or more modules corresponding to the above functions.

In a fourth aspect, the embodiment of the present application provides a communication device, and the device may be a network device, or may be a chip used for the network device. The device has the function of implementing the base station in the second aspect or any implementation manner in the second aspect. This function may be implemented by hardware, or may be implemented by executing corresponding software on the hardware. The hardware or software includes one or more modules corresponding to the above functions.

In the fifth aspect, the embodiment of the present application provides a communication device, including a processor and a memory; the memory is used to store computer instructions, and when the device is running, the processor executes the computer instructions stored in the memory so that the device executes The above-mentioned first aspect or the method in any one of the implementation manners of the first aspect or execute the above-mentioned second aspect or the method in any of the implementation manners of the second aspect.

In the sixth aspect, the embodiment of the present application provides a communication device, including a processor and an interface circuit, the processor is used to communicate with other devices through the interface circuit, and implements any one of the above-mentioned first aspect or the first aspect. The method in or perform the method in the second aspect above or any one of the implementation manners in the second aspect. The processor includes one or more.

In the seventh aspect, the embodiment of the present application also provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the computer-readable storage medium is run on the communication device, the communication device executes the above-mentioned first aspect or the first The method in any implementation manner in the second aspect or execute the method in the second aspect or any implementation manner in the second aspect.

In the eighth aspect, the embodiment of the present application further provides a computer program product, the computer program product includes a computer program, and when the computer program is run by the communication device, the communication device executes any one of the above first aspect or the first aspect. The method in the manner or execute the method in the above second aspect or any one of the implementation manners of the second aspect.

In the ninth aspect, the embodiment of the present application further provides a chip system, including: a processor, configured to execute the method in the above-mentioned first aspect or any one of the implementation manners of the first aspect, or execute the above-mentioned second aspect or the second aspect A method in any of the implementations.

In the tenth aspect, the embodiment of the present application further provides a communication system, including a device for performing the method in the above first aspect or any one of the implementation manners of the first aspect, and, for performing the above second aspect or the first aspect A device for implementing the method in any one of the two aspects.

Description of drawings

FIG. 1 is a schematic structural diagram of a mobile communication system applied in an embodiment of the present application;

FIG. 2 is a schematic flowchart of a CQI reporting method provided by an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 4 is a schematic structural diagram of another communication device provided by an embodiment of the present application.

Detailed ways

FIG. 1 is a schematic structural diagram of a communication system 1000 applied in an embodiment of the present application. As shown in FIG. 1 , the communication system includes a radio access network 100 and a core network 200 , and optionally, the communication system 1000 may also include the Internet 300 . Wherein, the radio access network 100 may include at least one radio access network device (such as 110a and 110b in FIG. 1 ), and may also include at least one terminal (such as 120a-120j in FIG. 1 ). The terminal is connected to the wireless access network device in a wireless manner, and the wireless access network device is connected to the core network in a wireless or wired manner. The core network equipment and the wireless access network equipment can be independent and different physical equipment, or the functions of the core network equipment and the logical functions of the wireless access network equipment can be integrated on the same physical equipment, or it can be a physical equipment It integrates some functions of core network equipment and some functions of wireless access network equipment. Terminals and wireless access network devices may be connected to each other in a wired or wireless manner. FIG. 1 is only a schematic diagram. The communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in FIG. 1 .

The radio access network device is the access device for the terminal to access the communication system through wireless means. The radio access network equipment can be a base station (base station), an evolved base station (evolved NodeB, eNodeB), a transmission reception point (transmission reception point, TRP), and the next generation in the fifth generation (5th generation, 5G) mobile communication system Base station (next generation NodeB, gNB), the next generation base station in the sixth generation (6th generation, 6G) mobile communication system, the base station in the future mobile communication system or the access node in the WiFi system, etc.; it can also complete the base station part A functional module or unit, for example, can be a centralized unit (central unit, CU) or a distributed unit (distributed unit, DU). The CU here completes the functions of the radio resource control protocol and the packet data convergence protocol (PDCP) of the base station, and also completes the function of the service data adaptation protocol (SDAP); the DU completes the functions of the base station The functions of the radio link control layer and the medium access control (medium access control, MAC) layer can also complete the functions of part of the physical layer or all of the physical layer. For the specific description of the above-mentioned protocol layers, you can refer to the third generation partnership project (3rd generation partnership project, 3GPP) related technical specifications. The radio access network device may be a macro base station (such as 110a in Figure 1), a micro base station or an indoor station (such as 110b in Figure 1), or a relay node or a donor node. The embodiments of the present application do not limit the specific technology and specific equipment form used by the radio access network equipment. For ease of description, a base station is used as an example of a radio access network device for description below.

The terminal is a device with wireless transceiver function, which can send signals to the base station or receive signals from the base station. A terminal may also be called terminal equipment, user equipment (user equipment, UE), mobile station, mobile terminal, and so on. Terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things ( internet of things, IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearables, smart transportation, smart city, etc. Terminals can be mobile phones, tablet computers, computers with wireless transceiver functions, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, etc. The embodiment of the present application does not limit the specific technology and specific equipment form used by the terminal.

Base stations and terminals can be fixed or mobile. Base stations and terminals can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and artificial satellites. The embodiments of the present application do not limit the application scenarios of the base station and the terminal.

The roles of the base station and the terminal can be relative. For example, the helicopter or UAV 120i in FIG. base station; however, for

base station

110a, 120i is a terminal, that is, communication between 110a and 120i is performed through a wireless air interface protocol. Of course, communication between 110a and 120i may also be performed through an interface protocol between base stations. In this case, compared to 110a, 120i is also a base station. Therefore, both the base station and the terminal can be collectively referred to as a communication device, 110a and 110b in FIG. 1 can be referred to as a communication device with a base station function, and 120a-120j in FIG. 1 can be referred to as a communication device with a terminal function.

The communication between the base station and the terminal, between the base station and the base station, and between the terminal and the terminal can be carried out through the licensed spectrum, the communication can also be carried out through the unlicensed spectrum, and the communication can also be carried out through the licensed spectrum and the unlicensed spectrum at the same time; Communications may be performed on frequency spectrums below megahertz (gigahertz, GHz), or communications may be performed on frequency spectrums above 6 GHz, or communications may be performed using both frequency spectrums below 6 GHz and frequency spectrums above 6 GHz. The embodiments of the present application do not limit the frequency spectrum resources used for wireless communication.

In the embodiments of the present application, the functions of the base station may also be performed by modules (such as chips) in the base station, or may be performed by a control subsystem including the functions of the base station. The control subsystem including base station functions here may be the control center in the above application scenarios such as smart grid, industrial control, intelligent transportation, and smart city. The functions of the terminal may also be performed by a module (such as a chip or a modem) in the terminal, or may be performed by a device including the terminal function.

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

In the embodiment of the present application, the time-domain symbols may be Orthogonal Frequency Division Multiplexing (OFDM) symbols, or Discrete Fourier Transform-spread-OFDM (Discrete Fourier Transform-spread-OFDM, DFT -s-OFDM) symbol. Unless otherwise specified, the symbols in the embodiments of the present application refer to time-domain symbols.

It can be understood that, in the embodiments of the present application, the physical uplink control channel (physical uplink control channel, PUCCH) and the physical uplink shared channel (physical uplink shared channel, PUSCH) are only used as a kind of uplink control channel and uplink data channel respectively For example, in different systems and different scenarios, the data channel and the control channel may have different names, which is not limited in this embodiment of the present application.

Some nouns or terms used in the embodiments of the present application are explained below.

(1) Transmitter channel (transmitter, TX)

The radio frequency (radio frequency, RF) transmission channel is referred to as the transmission channel. One transmit channel corresponds to one physical antenna port. The transmit channel can receive the baseband signal from the baseband chip, perform radio frequency processing on the baseband signal (such as up-conversion, amplification and filtering) to obtain a radio frequency signal, and finally radiate the radio frequency signal into space through the antenna. Specifically, the transmission channel may include an antenna switch, an antenna tuner, a power amplifier (power amplifier, PA), a mixer (mixer), a local oscillator (local oscillator, LO), a filter (filter) and other electronic devices. One or more, these electronic devices can be integrated into one or more chips as needed. The antenna can also sometimes be considered as part of the transmit channel. In the embodiments of the present application, turning off the antenna may also be referred to as turning off the transmission channel.

(2) Antenna port (port)

The antenna port may also be referred to as a port for short. Unless otherwise specified, the antenna ports in the embodiments of the present application refer to logical antenna ports rather than physical antenna ports. An antenna port can be associated with one or more transmit channels. The signal on each antenna port is transmitted through one or more transmit channels associated with it. When one antenna port is associated with multiple transmission channels, the signal on the antenna port is weighted by the weighting coefficient and then transmitted through the multiple transmission channels associated with it. It can also be understood that multiple physical antennas are weighted by weighting coefficients to form a logical antenna. The weighting coefficients here may be complex numbers or real numbers, and the weighting coefficients on different physical antennas may be the same or different. Each antenna port has corresponding time-frequency resources and reference signals. Time-frequency resources corresponding to different antenna ports may be the same or different. The reference signal transmitted by the base station through antenna port A can be used by the terminal to estimate the characteristics of the wireless channel from antenna port A to the terminal, and the characteristics of the wireless channel can be used by the terminal to estimate the physical channel transmitted through antenna port A, or use It is used to determine the modulation order, code rate and other information during data transmission. One reference signal may correspond to one or more antenna ports, and it may also be understood that one reference signal may be transmitted through one or more antenna ports.

(3)CSI

During the process of the wireless signal from the transmitting end to the receiving end through the wireless channel, it may experience scattering, reflection, and energy attenuation with distance, resulting in fading; in addition, the wireless signal may also be interfered by other signals at the receiving end, thus affecting the wireless signal. reception. Features such as signal attenuation and interference can be characterized by channel state information (CSI). Specifically, CSI may include CQI, precoding matrix indicator (precoding matrix indicator, PMI), rank indicator (rank indicator, RI), reference signal received power (reference signal received power, RSRP) and signal to interference noise ratio (signal to interference plus noise ratio, SINR) at least one. These CSIs can be sent by the UE to the base station through PUCCH or PUSCH. In the embodiments of the present application, if there is no logical conflict, the terms "CQI" and "CQI index" can be interchanged, and the terms "report", "feedback" and "send" can be interchanged.

(4) Reference signal

The reference signal is a known signal provided by the transmitting end to the receiving end for channel estimation or channel detection. In the embodiments of the present application, the reference signal can be used for channel measurement, interference measurement, etc., such as measuring CSI related parameters.

(5) Reference signal resources

The reference signal resources may specifically include at least one of resources such as time-frequency resources, antenna ports, power resources, and scrambling codes of reference signals. The base station can send the reference signal based on the reference signal resource, and the terminal can receive the reference signal based on the reference signal resource. In the embodiments of the present application, the one or more antenna ports corresponding to the reference signal resources may also be understood as the one or more antenna ports included in the reference signal resources.

Specifically, the reference signal involved in this embodiment of the present application may be a channel state information-reference signal (channel state information-reference signal, CSI-RS) or SSB. Correspondingly, the reference signal resources may be CSI-RS resources or SSB resources.

(6) CSI processing unit (CSI processing unit, CPU)

The terminal needs to occupy certain computing/storage resources for CSI measurement. In the 3GPP protocol, the number of CPUs is used to represent the resources occupied by the terminal to process the CSI. The terminal will report the number of CPUs that the terminal can support to the base station. For example, terminal 1 will inform the base station that the maximum number of CPUs it supports is 10; terminal 2 will inform the base station that the maximum number of CPUs it supports is 15. The maximum number of supported CPUs mentioned here refers to the number of CPUs supported at the same time, which may be the number of CPUs supported by one carrier at the same time, or may be the number of CPUs supported by all carriers at the same time. For example, the fact that the terminal supports only one CPU only means that at the same time, the terminal only has one CPU for CSI processing.

In the technical specification (TS) 38.331V16.6.0 of the 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP), it is defined in detail that the base station can configure to the terminal through radio resource control (RRC) signaling. CSI measurement and reporting related parameters. CSI measurement-related parameters are mainly configured through the CSI-MeasConfig information element, and CSI report-related parameters are mainly configured through the CSI-ReportConfig information element. The reportFreqConfiguration information element in the CSI-ReportConfig information element shows that the CQI reported by the terminal may include wideband CQI and/or subband CQI. For the detailed definition of CQI, please refer to Section 5.2.2.1 of 3GPP TS38.214 V16.7.0. For the detailed definition of CPU, please refer to Section 5.2.1.6 of 3GPP TS38.214 V16.7.0.

For CQI, it can be indicated by 4 bits. These 4 bits can also be called CQI index. For the detailed definition of CQI index, please refer to Table 5.2.2.1-2 and Table 5.2.2.1-3 in 3GPP TS38.214 V16.7.0 and Table 5.2.2.1-4. When reporting the CQI, the terminal uses the full 4 bits to report the wideband CQI index, and uses 2 bits to report the difference between the subband CQI index and the wideband CQI index. The 2 bits can also be called a sub-band differential CQI value (sub-band differential CQI value), and the specific mapping relationship is shown in Table 1 below. The subband offset level here is equal to the subband CQI index minus the wideband CQI index.

Table 1

sub-band differential CQI value

Subband offset level (offset level)

00	00
11	11
22	≥2≥2
33	≤-1≤-1

As mentioned above, the CQI is obtained based on measurement of reference signal resources, and the reference signal resources include antenna ports. For the scene where the transmission channel is dynamically shut down, since the number of antenna ports of the base station will change with the dynamic change of the transmission channel, if the terminal is still required to measure and report the CQI according to the port before the transmission channel is shut down, the CQI measurement will be inaccurate, thus As a result, the base station cannot perform data scheduling based on a relatively accurate CQI, thereby degrading system performance. In order to solve this problem, a possible implementation manner is that the terminal measures and reports CQI based on different numbers of antenna ports. The terminal needs to measure the CQI of the number of ports, which may be predefined by the protocol, or configured by the base station to the terminal through RRC signaling. For the CQI of a certain number of ports, the specific ports that the terminal needs to measure may also be predefined by the protocol or configured by RRC signaling.

For a cell configured with N antenna ports, where N is a positive integer, the base station can notify the terminal to measure 1-port CQI, 2-port CQI, 3-port CQI, ... N-1 port CQI and N-port CQI through RRC signaling at least one of the . For example, for a cell configured with 32 antenna ports, the base station may notify the terminal to measure at least one of the 1-port CQI, 2-port CQI, 3-port CQI, ..., 31-port CQI and 32-port CQI through RRC signaling. Specifically, an option may be added in the reportQuantity information element in the CSI-ReportConfig information element, which is used to instruct the terminal to specifically report the CQI corresponding to the number of antenna ports.

Assuming that the number of antenna ports configured in the cell is 32, the terminal needs to report the CQI of 2 ports, 4 ports, 8 ports, 16 ports and 32 ports at the same time; for the CQI of each port number, the terminal needs to report the wideband CQI and subband CQI at the same time , a wideband CQI corresponds to 10 subband CQIs; according to the above CQI reporting scheme, a wideband CQI index is reported using 4 bits, and a subband differential CQI value is reported using 2 bits; then a CSI report may require 120 bits to report CQI (5 wideband CQIs, 50 subband CQIs), the overhead of CSI reporting is too large.

In order to solve the problem of excessive CQI reporting overhead in the scenario where the transmission channel is dynamically shut down, an embodiment of the present application provides a CQI reporting method. A schematic flowchart of the CQI reporting method is shown in FIG. 2 .

S210, the base station sends configuration information to the terminal through RRC signaling, and the configuration information instructs the terminal to report CSI of M types of antenna port numbers, where M is an integer greater than 1. Correspondingly, the terminal receives the configuration information through RRC signaling.

It can be understood that the configuration information may instruct the terminal to report CSI of M types of antenna port numbers, where the CSI includes CQI. In the following, the CSI is CQI as an example for description, but the following method is also applicable to the measurement report of other CSI such as PMI, RI, RSRP and SINR. In the embodiments of the present application, the terms CSI and CQI can be interchanged if there is no logical conflict.

Implementation 1: The configuration information includes a first information, instructing the terminal to report the CQI of 1 port, the CQI of 2 ports, ..., the CQIs corresponding to M different port numbers in the N port CQI, N is an integer greater than 1, and N is the maximum number of antenna ports used for measurement, for example, N is 32. In the embodiment of the present application, the N-port CQI refers to the CQI corresponding to the number of ports being N, which may include wideband CQI, and may further include subband CQI. For example, the configuration information may include a CSI-ReportConfig information element, and there is an option in the reportQuantity information element in the CSI-ReportConfig information element, instructing the terminal to report 1-port CQI, 2-port CQI, ..., N-port CQI CQIs corresponding to M different numbers of ports. That is, the first information here may be the reportQuantity information element. Further, the configuration information also includes second information indicating reference signal resources. For example, the CSI-ReportConfig information element in the configuration information may include a resourcesForChannelMeasurement information element indicating reference signal resources used for channel measurement. That is, the second information here may be the resourcesForChannelMeasurement information element.

Implementation mode 2: the configuration information includes M pieces of first information, respectively instructing the terminal to report CQIs corresponding to M different numbers of ports in the CQI of 1 port, CQI of 2 ports, . . . , N-port CQI. For example, the configuration information may include M CSI-ReportConfig information elements, and there is an option in the reportQuantity information element in the CSI-ReportConfig information element, instructing the terminal to report 1-port CQI, 2-port CQI, ..., N-port CQI A CQI corresponding to the number of ports, that is, the first information here may be a reportQuantity information element. Further, the configuration information also includes M pieces of second information, respectively indicating M reference signal resources. For example, each of the M CSI-ReportConfig information elements in the configuration information may respectively include a resourcesForChannelMeasurement indicating reference signal resources used for channel measurement. That is, the second information here may be the resourcesForChannelMeasurement information element. The reference signal resources indicated by the M pieces of second information may be the same or different.

Optionally, the configuration information also instructs the terminal to feed back the CQI in a compressed manner. Specifically, a possible solution is that after receiving the configuration information, the terminal feeds back the CQI in a compressed manner. Another possible solution is that the configuration information further includes a compressed feedback indication, indicating that the CQI is fed back in a compressed manner. Specifically, the compression feedback indication may have three indication manners.

(1) When the configuration information includes the compressed feedback indication, the terminal feeds back the CQI in a compressed manner; when the configuration information does not include the compressed feedback indication, the terminal feeds back the CQI in an uncompressed manner.

(2) When the value of the compressed feedback indication is the first value, the terminal feeds back the CQI in a compressed manner; when the value of the compressed feedback indication is the second value, the terminal feeds back the CQI in an uncompressed manner. Here, the first value can be TRUE, and the second value can be FALSE; or, the first value can be 1, and the second value can be 0; or, the first value can be 0, and the second value can be 1.

(3) When the configuration information includes a compressed feedback indication, and the value of the compressed feedback indication is the first value, the terminal uses compression mode 1 to feed back the CQI; when the configuration information includes the compressed feedback indication, and the value of the compressed feedback indication is the second value When the value is set, the terminal uses compression mode 2 to feed back the CQI. Here, the first value may be 1, and the second value may be 0; or, the first value may be 0, and the second value may be 1. When the configuration information does not include the compressed feedback indication, the terminal feeds back the CQI in an uncompressed manner.

The so-called uncompressed CQI feedback may mean that the wideband CQI can be indicated by P bits, and the subband differential CQI value can be indicated by Q bits, where P and Q are integers greater than 1, and P is greater than Q. For example, the wideband CQI is indicated by 4 bits, and the subband differential CQI value is indicated by 2 bits.

The so-called compressed feedback CQI can refer to the CQI corresponding to the reference port number N _ref , whose wideband CQI is indicated by P bits, and the sub-band differential CQI value is indicated by Q1 bits; For the CQI corresponding to the port number N1, the P1 bit is used to indicate the wideband differential CQI value, and the subband differential CQI value is indicated by the Q2 bit. Among them, P1 is a positive integer less than P, Q1 is a positive integer less than or equal to Q, Q2 is a positive integer less than Q, Q2 is less than or equal to Q1, Q2 is less than or equal to P1, N _ref and N1 are positive integers, and N1 is not It is equal to N _ref , and both N _ref and N1 are one of the above M types of antenna port numbers. For example, for the N _ref port CQI, its wideband CQI is indicated by 4 bits, and the subband differential CQI value is indicated by 2 bits; for the N1 port CQI, 2 bits are used to indicate the wideband differential CQI value, and the subband differential CQI value is indicated by 1 bit or 2 bits to indicate. Or, for N _ref port CQI, its wideband CQI is indicated by 4 bits, and the subband differential CQI value is indicated by 1 bit; for N1 port CQI, its wideband differential CQI value is indicated by 1 bit or 2 bits, and the subband differential CQI value is indicated by 1 bit or 2 bits. The CQI value is indicated using 1 bit. It can be understood that the CQI fed back in a compressed manner may only feed back the wideband CQI.

The reference port number N _ref here is one of the above M types of antenna port numbers, and the reference port number may be predefined by the protocol, or notified by the base station to the terminal through RRC signaling. For example, for a cell configured with N antenna ports, the protocol defines the number of reference ports as N antenna ports, or defines the number of reference ports as N/2 antenna ports, or defines the number of reference ports as 2 antenna ports.

The subband differential CQI value is quantified according to the subband offset level. The subband offset level is equal to the subband CQI index corresponding to the port number N2 minus the wideband CQI index corresponding to the port number N2. Here, N2 is equal to N1 or _Nref . When the subband differential CQI value is indicated by using 2 bits, its mapping relationship can be referred to in Table 1 above. When the subband differential CQI value is indicated by 1 bit, its mapping relationship can be referred to in Table 2 below.

Table 2

sub-band differential CQI valuesub-band differential CQI value	子带偏移级别subband offset level
00	≤0≤0
11	≥1≥1

The wideband differential CQI value is quantified according to the wideband offset level, which is equal to the wideband CQI index corresponding to the port number N1 minus the wideband CQI index corresponding to the port number N _ref . When the wideband differential CQI value (wideband differential CQI value) is indicated by using 2 bits, its mapping relationship can refer to Table 3 below. When the wideband differential CQI value is indicated by 1 bit, its mapping relationship can refer to Table 4 below.

table 3

wideband differential CQI valuewideband differential CQI value	宽带偏移级别broadband offset level
00	00
11	11
22	≥2≥2
33	≤-1≤-1

Table 4

sub-band differential CQI valuesub-band differential CQI value	宽带偏移级别broadband offset level
00	≤0≤0
11	≥1≥1

S220, the base station sends a reference signal to the terminal. Correspondingly, the terminal receives the reference signal from the base station, and performs channel measurement according to the reference signal.

The parameters used by the base station to send the reference signal are consistent with the parameters in the reference signal resource indicated by the second information. The terminal receives the reference signal and performs channel measurement according to the parameters of the reference signal resource indicated by the second information, so as to obtain the CQI of the M types of antenna port numbers. The CQI here may include wideband CQI and/or subband CQI.

For implementation 1 in S210, the terminal may also report capability information to the base station, indicating the number of CPUs the terminal needs to use to process CSI with M types of antenna ports, and the CQI in the CSI is reported in the above compressed manner. Here, "processing the CSI of the number of M types of antenna ports" may also be specifically understood as "measuring and reporting the CSI of the number of M types of antenna ports". Since the CSI of the M types of antenna ports is measured based on the same reference signal, the number of CPUs required for the CSI of the M types of antenna ports may be less than that of measuring the M types of antenna ports based on the M reference signals. The number of CPUs required by the number of CSIs. By reporting the capability information by the terminal, the base station can perform finer scheduling on the terminal, and reasonably schedule the transmission of reference signals and the measurement of CSI.

Optionally, the capability information includes the number of CPUs corresponding to the CSI for measuring and reporting the number of M1 antenna ports and the number of M2 antenna ports. For example, the capability information includes the number of CPUs required by the terminal to measure and report CSI with the number of M1 antenna ports O _CPU,M1 , and the number of CPUs O _CPU required for the terminal to measure and report CSI with the number of M2 antenna ports _,M2 , where M1 and M2 are unequal positive integers, and both M1 and M2 are less than or equal to N. For example, the number of M1 antenna ports here can be 3 types of antenna ports: 2 ports, 4 ports and 8 ports; the number of M2 antenna ports can be 4 types of antenna ports: 2 ports, 4 ports, 8 ports and 16 ports .

Optionally, the capability information includes a time-domain extension factor T corresponding to measuring and reporting CSI of various numbers of antenna ports. For example, the number of CPUs required by the terminal to report the CSI of a number of antenna ports based on a reference signal is O _CPU,1 , and only occupies 1 time unit, then the terminal reports the CSI of the number of M antenna ports based on the reference signal. Only O _{CPU and 1} CPU are still used, but due to the increased calculation, it takes T _M time units to complete the calculation. The time unit here may be one or more symbols, or one or more time slots.

Optionally, the capability information includes a scaling factor K corresponding to the number of CPUs for measuring and reporting the CSI of various numbers of antenna ports. For example, the number of CPUs required by the terminal to report the CSI of one antenna port number based on a reference signal is O _CPU,1 , then the number of CPUs required by the terminal to report the CSI of M antenna port numbers based on the reference signal can be K _M O _CPU,1

It can be understood that the above capability information can also be predefined by the protocol, that is to say, the protocol can define the number of CPUs that the terminal needs to use to measure and report the CSI of M types of antenna ports; or, define the terminal to measure and report M types of The time-domain extension factor corresponding to the CSI of the number of antenna ports; or, the scale factor that defines the number of CPUs corresponding to the CSI of the number of M antenna ports measured and reported by the terminal.

S230, the terminal reports the CQIs corresponding to the M types of antenna ports to the base station through a physical channel in a compressed manner, and correspondingly, the base station receives the CQIs corresponding to the M types of antenna ports from the terminal. For specific descriptions about reporting the CQI in a compressed manner, reference may be made to related descriptions in the aforementioned S210. The physical channel here can be PUCCH or PUSCH. Specifically, the CQI corresponding to the M types of antenna port numbers may be carried on a physical channel in one time slot or one sub-slot.

Although the embodiment of the present application is proposed in the scenario where the base station antenna is dynamically turned off, the application scenario of the embodiment of the present application is not limited to this, any scenario that needs to reduce the CQI report overhead can apply the embodiment of the present application .

It can be understood that, in order to implement the functions in the foregoing embodiments, the base station and the terminal include hardware structures and/or software modules corresponding to each function. Those skilled in the art should easily realize that the present application can be implemented in the form of hardware or a combination of hardware and computer software with reference to the units and method steps of the examples described in the embodiments disclosed in the present application. Whether a certain function is executed by hardware or computer software drives the hardware depends on the specific application scenario and design constraints of the technical solution.

FIG. 3 and FIG. 4 are schematic structural diagrams of a possible communication device provided by an embodiment of the present application. These communication devices can be used to implement the functions of the terminal or the base station in the above method embodiments, and therefore can also realize the beneficial effects of the above method embodiments. In the embodiment of the present application, the communication device may be one of the terminals 120a-120j shown in FIG. 1, or the

base station

110a or 110b shown in FIG. 1, or a terminal or a base station Modules (such as chips).

As shown in FIG. 3 , the communication device 300 includes a processing unit 310 and a transceiver unit 320 . The communication device 300 is configured to implement functions of a terminal or a base station in the method embodiment shown in FIG. 2 above.

When the communication device 300 is used to implement the functions of the terminal in the method embodiment shown in FIG. 2: the transceiver unit 320 is used to receive configuration information and reference signals from the base station; the processing unit 310 is used to perform channel measurement according to the reference signal to obtain M The CQIs of the number of antenna ports of different types; the transceiver unit 320 is also configured to report the CQI corresponding to the number of antenna ports of M types to the base station through a physical channel in a compressed manner.

When the communication device 300 is used to implement the functions of the base station in the method embodiment shown in FIG. 2: the transceiver unit 320 is used to send configuration information and reference signals to the terminal; CQI; the processing unit 310 is configured to process the CQI corresponding to the number of M antenna ports.

For a more detailed description of the processing unit 310 and the transceiver unit 320, reference may be made to the relevant description in the method embodiment shown in FIG. 2 .

As shown in FIG. 4 , the communication device 400 includes a processor 410 and an interface circuit 420 . The processor 410 and the interface circuit 420 are coupled to each other. It can be understood that the interface circuit 420 may be a transceiver or an input-output interface. Optionally, the communication device 400 may further include a memory 430 for storing instructions executed by the processor 410 or storing input data required by the processor 410 to execute the instructions or storing data generated after the processor 410 executes the instructions.

When the communication device 400 is used to implement the method shown in FIG. 2 , the processor 410 is used to implement the functions of the processing unit 310 , and the interface circuit 420 is used to implement the functions of the transceiver unit 320 .

When the above communication device is a chip applied to a terminal, the terminal chip implements the functions of the terminal in the above method embodiment. The terminal chip receives information from other modules in the terminal (such as radio frequency modules or antennas), and the information is sent to the terminal by the base station; or, the terminal chip sends information to other modules in the terminal (such as radio frequency modules or antennas), and the The information is sent by the terminal to the base station.

When the above communication device is a module applied to a base station, the base station module implements the functions of the base station in the above method embodiment. The base station module receives information from other modules in the base station (such as radio frequency modules or antennas), and the information is sent by the terminal to the base station; or, the base station module sends information to other modules in the base station (such as radio frequency modules or antennas), the The information is sent by the base station to the terminal. The base station module here may be a baseband chip of the base station, or a DU or other modules, and the DU here may be a DU under an open radio access network (O-RAN) architecture.

It can be understood that the processor in the embodiment of the present application can be a central processing unit, and can also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC ), Field Programmable Gate Array (Field Programmable Gate Array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. A general-purpose processor can be a microprocessor, or any conventional processor.

The method steps in the embodiments of the present application may be implemented in hardware, and may also be implemented in software instructions executable by a processor. Software instructions can be composed of corresponding software modules, and software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only Memory, registers, hard disk, removable hard disk, CD-ROM or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. A storage medium may also be an integral part of the processor. The processor and storage medium can be located in the ASIC. In addition, the ASIC can be located in the base station or the terminal. The processor and the storage medium may also exist in the base station or the terminal as discrete components.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer programs or instructions. When the computer program or instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are executed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, network equipment, user equipment, or other programmable devices. The computer program or instructions can be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instructions can be downloaded from a website, computer, A server or data center transmits to another website site, computer, server or data center by wired or wireless means. The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrating one or more available media. The available medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it may also be an optical medium, such as a digital video disk; or it may be a semiconductor medium, such as a solid-state hard disk. The computer readable storage medium may be a volatile or a nonvolatile storage medium, or may include both volatile and nonvolatile types of storage media.

In each embodiment of the present application, if there is no special explanation and logical conflict, the terms and/or descriptions between different embodiments are consistent and can be referred to each other, and the technical features in different embodiments are based on their inherent Logical relationships can be combined to form new embodiments.

In this application, "at least one" means one or more, and "multiple" means two or more. "And/or" describes the association relationship of associated objects, indicating that there can be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. In the text description of this application, the character "/" generally indicates that the contextual objects are an "or" relationship; in the formulas of this application, the character "/" indicates that the contextual objects are a "division" Relationship. "Including at least one of A, B and C" may mean: including A; including B; including C; including A and B; including A and C; including B and C; including A, B and C.

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

Claims

A method for reporting a channel quality indicator CQI, performed by a terminal device or a module applied to the terminal device, characterized in that it includes:

receiving configuration information from the network device through radio resource control RRC signaling, the configuration information instructing the terminal device to report the CQI of the number of M antenna ports, where M is an integer greater than 1;

receiving a reference signal from the network device, and performing channel measurement according to the reference signal;

In a compressed manner, report the CQI corresponding to the number of M antenna ports to the network device through a physical channel.
The method according to claim 1, wherein the reporting of the CQI corresponding to the number of M antenna ports to the network device in a compressed manner specifically includes:

Use P bits to indicate the wideband CQI corresponding to the number of reference ports N ref ;

Use the P1 bit to indicate the wideband differential CQI value corresponding to the port number N1;

Wherein, the wideband differential CQI value is quantified according to a wideband offset level, and the wideband offset level is equal to the wideband CQI index corresponding to the port number N1 minus the wideband CQI index corresponding to the port number N ref , where , P1 and P are positive integers, P1 is smaller than P, N ref and N1 are positive integers, N1 is not equal to N ref , and N ref and N1 are one of the M types of antenna port numbers.
The method according to claim 2, wherein the reporting of the CQI corresponding to the number of M antenna ports to the network device in a compressed manner further includes:

Use the Q1 bit to indicate the sub-band differential CQI value corresponding to the reference port number N ref ;

Use the Q2 bit to indicate the subband differential CQI value corresponding to the port number N1;

Wherein, the subband differential CQI value is quantified according to the subband offset level, and the subband offset level is equal to the subband CQI index corresponding to the port number N2 minus the wideband CQI index corresponding to the port number N2, N2 is equal to N1 or N ref , Q1 is a positive integer less than P, Q2 is less than or equal to Q1, and Q2 is less than or equal to P1.
The method according to claim 2 or 3, wherein the reporting of the CQI corresponding to the number of M antenna ports to the network device in a compressed manner specifically includes:

Use 4 bits to indicate the wideband CQI corresponding to the reference port number N ref , and use 2 bits to indicate the subband differential CQI value corresponding to the reference port number N ref ;

2 bits are used to indicate the wideband differential CQI value corresponding to the port number N1, and 2 bits are used to indicate the subband differential CQI value corresponding to the port number N1.
The method according to claim 2 or 3, wherein the reporting of the CQI corresponding to the number of M antenna ports to the network device in a compressed manner specifically includes:

Use 4 bits to indicate the wideband CQI corresponding to the reference port number N ref , and use 1 bit to indicate the subband differential CQI value corresponding to the reference port number N ref ;

2 bits are used to indicate the wideband differential CQI value corresponding to the port number N1, and 1 bit is used to indicate the subband differential CQI value corresponding to the port number N1.
The method according to any one of claims 1 to 5, wherein the configuration information further instructs the terminal device to report the CQI in a compressed manner.
The method according to any one of claims 1 to 6, further comprising:

Sending capability information to the network device, the capability information indicating the number of CSI processing units that the terminal device needs to use to measure and report CSI with M types of antenna ports, and the CQI in the CSI is compressed according to the reported in a manner.
A method for reporting a channel quality indicator CQI, performed by a network device or a module applied to the network device, characterized in that it includes:

Sending configuration information to the terminal device through radio resource control RRC signaling, the configuration information instructing the terminal device to report the CQI of the number of M antenna ports, where M is an integer greater than 1;

sending a reference signal to the terminal device;

receiving the CQI corresponding to the number of M types of antenna ports from the terminal device, where the CQI is carried on a physical channel in a compressed manner.
According to the method according to claim 8, the CQI is carried on a physical channel in a compressed manner, characterized in that:

The wideband CQI corresponding to the reference port number N ref is indicated by P bits;

The wideband differential CQI value corresponding to the port number N1 is indicated by the P1 bit;

Wherein, the wideband differential CQI value is quantified according to a wideband offset level, and the wideband offset level is equal to the wideband CQI index corresponding to the port number N1 minus the wideband CQI index corresponding to the port number N ref , where , P1 and P are positive integers, P1 is smaller than P, N ref and N1 are positive integers, N1 is not equal to N ref , and N ref and N1 are one of the M types of antenna port numbers.
According to the method according to claim 9, the CQI is carried on a physical channel in a compressed manner, characterized in that:

The subband differential CQI value corresponding to the reference port number N ref is indicated by the Q1 bit;

The subband differential CQI value corresponding to the port number N1 is indicated by the Q2 bit;

Wherein, the subband differential CQI value is quantified according to the subband offset level, and the subband offset level is equal to the subband CQI index corresponding to the port number N2 minus the wideband CQI index corresponding to the port number N2, N2 is equal to N1 or N ref , Q1 is a positive integer less than P, Q2 is less than or equal to Q1, and Q2 is less than or equal to P1.
According to the method according to claim 9 or 10, the CQI is carried on a physical channel in a compressed manner, characterized in that:

The wideband CQI corresponding to the reference port number N ref is indicated by 4 bits, and the subband differential CQI value corresponding to the reference port number N ref is indicated by 2 bits;

The wideband differential CQI value corresponding to the port number N1 is indicated by 2 bits, and the subband differential CQI value corresponding to the port number N1 is indicated by 2 bits.
According to the method according to claim 9 or 10, the CQI is carried on a physical channel in a compressed manner, characterized in that:

The wideband CQI corresponding to the reference port number N ref is indicated by 4 bits, and the subband differential CQI value corresponding to the reference port number N ref is indicated by 1 bit;

The wideband differential CQI value corresponding to the port number N1 is indicated by 2 bits, and the subband differential CQI value corresponding to the port number N1 is indicated by 1 bit.
The method according to any one of claims 8 to 12, wherein the configuration information further instructs the terminal device to report the CQI in a compressed manner.
The method according to any one of claims 8 to 13, further comprising:

receiving capability information from the terminal device, the capability information indicating the number of CSI processing units that the terminal device needs to use to measure and report CSI with M types of antenna ports, and the CQI in the CSI is based on the Reported in a compressed way.
A communication device, comprising a module for performing the method according to any one of claims 1-7 or 8-14.
A communication device, characterized in that it includes a processor and an interface circuit, the interface circuit is used to receive signals from other communication devices and transmit them to the processor or send signals from the processor to other communication devices , the processor implements the method according to any one of claims 1 to 7 or 8 to 14 through a logic circuit or by executing code instructions.
A computer-readable storage medium, which is characterized in that computer programs or instructions are stored in the storage medium, and when the computer programs or instructions are executed by a communication device, the communication device realizes any of claims 1 to 7 or The method described in any one of 8 to 14.
A computer program, characterized in that, when the computer program is executed by a communication device, the communication device is made to implement the method according to any one of claims 1-7 or 8-14.