Feedback of channel state information, receiving method and device, equipment, storage medium

Abstract

Embodiments of the present application disclose a channel state information feedback method, a receiving method and device, equipment and a storage medium. The channel state information feedback method comprises the following steps: determining the priority of a channel state information (CSI) parameter in a CSI parameter set; determining a to-be-fed-back CSI parameter and a time-frequency resource position for feeding back the to-be-fed-back CSI parameter according to the priority of the CSI parameter; and feeding back the to-be-fed-back CSI parameter at the time-frequency resource position.

Description

[0001] This application is a divisional application of Chinese patent application No. 201710317504.X, filed on May 5, 2017, entitled “Method and apparatus, device and storage medium for feedback and reception of channel state information”. Technical Field

[0002] This invention relates to the field of communication technology, and in particular to a method, apparatus, device, and storage medium for feedback and reception of channel state information. Background Technology

[0003] In wireless communication systems such as Long Term Evolution (LTE) and New Radio (NR), the first and second communication nodes typically employ multiple antennas for transmitting and receiving, respectively, to achieve higher transmission rates. To achieve the performance of a multi-antenna system, the first communication node needs to know the wireless channel state information (WSSI) to adjust beam direction, precoding weights, and modulation / coding schemes accordingly. Ensuring the accuracy of channel measurements and feedback, as well as the rationality and robustness of feedback overhead, is a popular research topic.

[0004] The measurement and feedback of Channel State Information (CSI) was designed to be relatively simple in early protocols. However, with the development of technology, the requirements for obtaining high-precision CSI have become increasingly stringent. Providing more accurate CSI feedback with reasonable overhead and appropriate complexity is the goal pursued in the design of wireless communication systems.

[0005] With the development of Multiple-Input Multiple-Output (MIMO) computation, the amount of CSI information required for feedback is also increasing. In addition to Channel Quality Indication (CQI), Precoding Matrix Indicator (PMI), and Rank Indicator (RI), it also includes Channel State Information Reference Pilot Resource Indicator (CSI-RS Resource Indicator, CRI). For codebooks, two types of CSI feedback have emerged: CSI Feedback Type I and CSI Feedback Type II.

[0006] Due to the introduction of new first channel state information parameters, and the potential introduction of new channel state information parameters in the enhancement of CSI feedback category II, the priority relationships of these channel state information parameters—including the priority relationship between newly introduced CSI parameters and the original Release 13 related CSI parameters, as well as the priority relationship among newly introduced CSI parameters—require further consideration. Specifically, how to determine the resource locations for feedback CSI parameters based on these priority relationships to achieve better performance, which parameters should be prioritized for feedback in case of conflicts, how to feed back some CSI parameters (such as reference signal received power) using limited resources, and how to determine the relationship between CSI parameters and parameters of the control channel outside of CSI parameters—remains a challenge. Currently, no effective solutions have been proposed for these technical problems in related technologies. Summary of the Invention

[0007] To address existing technical problems, embodiments of the present invention provide a method, apparatus, device, and storage medium for transmitting channel state information. This method determines the priority relationships between newly introduced CSI parameters and the original Release 13-related CSI parameters, as well as the priority relationships between the newly introduced CSI parameters. Based on these priority relationships, the time-frequency resource locations of the feedback CSI parameters are determined, improving the accuracy of channel state information transmission and thus enhancing system performance.

[0008] To achieve the above objectives, the technical solution of this invention is implemented as follows:

[0009] In a first aspect, embodiments of the present invention provide a method for feedback of channel state information, the method comprising:

[0010] Determine the priority of CSI parameters in the Channel State Information (CSI) parameter set;

[0011] The CSI parameters to be fed back and the time-frequency resource locations for feeding back the CSI parameters to be fed back are determined based on the priority of the CSI parameters.

[0012] The CSI parameters to be fed back are fed back at the time-frequency resource location.

[0013] In a second aspect, embodiments of the present invention provide a method for receiving channel state information, the method comprising:

[0014] Determine the priority of CSI parameters in the CSI parameter set;

[0015] The CSI parameters transmitted by the second communication node and the time-frequency resource location of the second communication node for transmitting the CSI parameters are determined according to the priority of the CSI parameters.

[0016] The CSI parameters transmitted by the second communication node are received at the time-frequency resource location.

[0017] Thirdly, embodiments of the present invention provide a channel state information feedback device, the device comprising:

[0018] The first determining module is used to determine the priority of CSI parameters in the Channel State Information (CSI) parameter set;

[0019] The second determining module is used to determine the CSI parameters to be fed back and the time-frequency resource location for feeding back the CSI parameters according to the priority of the CSI parameters.

[0020] The feedback module is used to feed back the CSI parameters to be fed back at the time-frequency resource location.

[0021] Fourthly, embodiments of the present invention provide a second communication node, the second communication node comprising at least a processor and a storage medium configured to store executable instructions, wherein:

[0022] The processor is configured to execute stored executable instructions, the executable instructions including:

[0023] Determine the priority of CSI parameters in the Channel State Information (CSI) parameter set;

[0024] The CSI parameters to be fed back and the time-frequency resource locations for feeding back the CSI parameters to be fed back are determined based on the priority of the CSI parameters.

[0025] The CSI parameters to be fed back are fed back at the time-frequency resource location.

[0026] Fifthly, embodiments of the present invention provide a storage medium storing computer-executable instructions configured to execute the aforementioned channel state information feedback method.

[0027] Sixthly, embodiments of the present invention provide a channel state information receiving apparatus, the apparatus comprising:

[0028] The third determining module is used to determine the priority of CSI parameters in the CSI parameter set;

[0029] The fourth determining module is used to determine the CSI parameters transmitted by the second communication node and the time-frequency resource location of the second communication node transmitting the CSI parameters based on the priority of the CSI parameters.

[0030] The receiving module is used to receive CSI parameters transmitted by the second communication node at the time-frequency resource location.

[0031] In a seventh aspect, embodiments of the present invention provide a first communication node, the first communication node comprising at least: a processor and a storage medium configured to store executable instructions, wherein:

[0032] The processor is configured to execute stored executable instructions, the executable instructions including:

[0033] Determine the priority of CSI parameters in the CSI parameter set;

[0034] The CSI parameters transmitted by the second communication node and the time-frequency resource location of the second communication node for transmitting the CSI parameters are determined according to the priority of the CSI parameters.

[0035] The CSI parameters transmitted by the second communication node are received at the time-frequency resource location.

[0036] Eighthly, embodiments of the present invention provide a computer storage medium storing computer-executable instructions configured to perform the aforementioned method for receiving channel state information.

[0037] This invention provides a method and apparatus for transmitting channel state information (CSI), a second communication node, and a storage medium. The method involves: first, determining the priority of CSI parameters in the CSI parameter set; then, determining the CSI parameters to be fed back and the time-frequency resource locations for feeding back the CSI parameters based on their priorities; and finally, feeding back the CSI parameters at the time-frequency resource locations. This establishes the priority relationships between newly introduced CSI parameters and the original Release 13-related CSI parameters, as well as the priority relationships among the newly introduced CSI parameters themselves. Based on these priority relationships, the time-frequency resource locations for feeding back the CSI parameters are determined, improving the accuracy of channel state information transmission and thus enhancing system performance. Attached Figure Description

[0038] In the accompanying drawings (which are not necessarily drawn to scale), similar reference numerals may describe similar parts in different views. Similar reference numerals with different letter suffixes may indicate different examples of similar parts. The drawings illustrate, by way of example and not limitation, the various embodiments discussed herein.

[0039] Figure 1 A schematic diagram illustrating the implementation process of a channel state information feedback method provided in an embodiment of the present invention;

[0040] Figure 2a A schematic diagram of a DMRS pilot pattern filling the entire symbol, provided as an embodiment of the present invention;

[0041] Figure 2bA schematic diagram showing another DMRS pilot pattern filling the entire symbol, provided as an embodiment of the present invention;

[0042] Figure 2c A schematic diagram showing another DMRS pilot pattern filling the entire symbol, provided as an embodiment of the present invention;

[0043] Figure 2d A schematic diagram showing another DMRS pilot pattern filling the entire symbol, provided as an embodiment of the present invention;

[0044] Figure 2e A schematic diagram showing another DMRS pilot pattern filling the entire symbol, provided as an embodiment of the present invention;

[0045] Figure 2f A schematic diagram showing another DMRS pilot pattern filling the entire symbol, provided as an embodiment of the present invention;

[0046] Figure 2g A schematic diagram showing another DMRS pilot pattern filling the entire symbol, provided as an embodiment of the present invention;

[0047] Figure 3a This is a schematic diagram of a DMRS pilot pattern provided in an embodiment of the present invention, where the pattern is discrete on one symbol.

[0048] Figure 3b This is a schematic diagram showing that the DMRS pilot pattern provided in the embodiments of the present invention is discrete in one symbol;

[0049] Figure 3c This is a schematic diagram showing that the DMRS pilot pattern provided in the embodiments of the present invention is discrete in one symbol;

[0050] Figure 3d This is a schematic diagram showing that the DMRS pilot pattern provided in the embodiments of the present invention is discrete in one symbol;

[0051] Figure 3e This is a schematic diagram showing that the DMRS pilot pattern provided in the embodiments of the present invention is discrete in one symbol;

[0052] Figure 3f This is a schematic diagram showing that the DMRS pilot pattern provided in the embodiments of the present invention is discrete in one symbol;

[0053] Figure 3g This is a schematic diagram showing that the DMRS pilot pattern provided in the embodiments of the present invention is discrete in one symbol;

[0054] Figure 3h This is a schematic diagram showing that the DMRS pilot pattern provided in the embodiments of the present invention is discrete in one symbol;

[0055] Figure 4 A schematic diagram illustrating the implementation process of a method for receiving channel state information provided in an embodiment of the present invention;

[0056] Figure 5 A schematic diagram of the composition structure of a channel state information feedback device provided in an embodiment of the present invention;

[0057] Figure 6 This is a schematic diagram of the composition structure of a second communication node provided in an embodiment of the present invention. Detailed Implementation

[0058] To better understand the embodiments of the present invention, some concepts and evolution process of channel state information in RAN1 of the 3rd Generation Partnership Project (3GPP) are explained below.

[0059] Channel state information (CSI) mainly includes CQI, PMI, and RI. Here, the CQI measured across the entire system bandwidth is called Wideband CQI (WB CQI), and the CQI measured on a sub-band is called Sub-Band CQI (SB CQI). The PMI indication varies depending on the codebook. For example, in LTE, Release 8 and Release 9 use Single Stage codebooks, and CSI only needs to feed back one precoding matrix index i. However, the 8-antenna codebook in Release 10 and the 4-antenna codebook in Release 12 are 1-dimensional Dual Stage codebooks, including a first precoding matrix index i1 and a second precoding matrix index i2. Release 13 introduced a 2D Dual Stage codebook. The first precoding matrix index includes a first-dimensional first precoding matrix index (or first precoding matrix index) i11, indicating the first precoding matrix vector or vector group information in the first dimension; a second-dimensional first precoding matrix index (or first precoding matrix index) i12, indicating the first precoding matrix vector or vector group information in the second dimension; and a second precoding matrix index i2. Release 14 introduced a linearly merged codebook, where each codeword in the codebook set is composed of two linearly merged vectors. This further introduces beams (also called precoding vectors or discrete Fourier vectors) or beam group information, or beam index indication information, beam group index indication information, beam group bias, and beam bias, collectively referred to as beam information of the linearly merged codebook. The merging phase or phase indication information of the linearly merged codebook is also included, collectively referred to as phase information of the linearly merged codebook. The merging amplitude, power, amplitude indication, or power indication of the linear merging codebook are collectively referred to here as the amplitude information of the linear merging codebook. Sometimes, one or more of the first precoding matrix index, the second precoding matrix index, the amplitude information of the linear merging codebook, the phase information of the linear merging codebook, and the beam information of the linear merging codebook are all referred to as precoding matrix indices. The indexes mentioned in this specification are sometimes also called indicators, identifiers, etc.

[0060] With the development of MIMO computing, the amount of CSI information that needs to be fed back is also increasing. In addition to CQI / PMI / RI, it also includes Channel State Information Reference Pilot Resource Indicator (CSI-RS resource Indicator, CRI).

[0061] For codebooks, two types of CSI feedback also emerged:

[0062] CSI Feedback Type I: This mainly refers to the fact that the codebook corresponding to the precoding matrix index contained in the CSI is a traditional codebook, such as the codebook before Release 13 in LTE. The feedback content includes, but is not limited to, i, i1, i2, i11 and i12.

[0063] CSI Feedback Type II: This mainly refers to CSI feedback where the codewords in the codebook set are not CSI feedback type I codewords. Examples include linearly combined codewords, where each codeword is typically composed of multiple beams linearly combined; channel correlation matrices and their corresponding eigenvectors; or hybrid CSI feedback.

[0064] The channel state information parameters of the CSI feedback category I include at least one of the following precoding matrix indices: precoding matrix index i, first precoding matrix index i1 and second precoding matrix index i2, first dimension first precoding matrix index i11 and second dimension first precoding matrix index i12;

[0065] The channel state information parameters of the CSI feedback category II include at least one of the following: beam index information, beam index offset (the offset here is relative to the first set of beam index information), beam linear combination amplitude information, beam linear combination phase information, beam linear combination power information, beam linear combination number information, beam linear combination amplitude offset information, beam linear combination phase offset information, channel correlation matrix information, channel correlation matrix eigenvalue information, and channel correlation matrix eigenvector information.

[0066] In NR, not only can the precoding weights be adjusted in the baseband, but the radio frequency (RF) beam information can also be adjusted. Especially in high-frequency (carrier frequency greater than 6 GHz) systems, multiple panels are used, each panel comprising multiple rows and columns of elements. These are virtualized into one or more ports / transceiver units / antennas via RF beams. The RF beam can be managed according to changes in the wireless channel. Beam management includes beam scanning, beam combination feedback, beam measurement, and beam recovery. This introduces new channel state information. To distinguish it from the previous baseband-related channel state information, the channel state information related to RF beam management is called Type I channel state information (e.g., RF beam index indication, RF beam group indication, channel state information reference signal index indication, reference signal received power (RSRP, etc.)). The original baseband-related channel state information (RI, PMI, CQI, CRI, channel state information corresponding to feedback category I, and channel state information corresponding to feedback category II) is called Type II channel state information. It should be noted that the RF beam and the baseband precoded beam in feedback category I or feedback category II are sometimes referred to as beams.

[0067] Here, the first type of channel state information includes a channel state information reference signal index (CSIRI), primarily used in the beam selection process of radio frequency beam management. During beam selection, the first communication node configures N1 CSI-RS resources. Each CSI-RS resource pilot uses an analog beam for transmission. The receiver measures the channel quality (RSRP) on the N1 CSI-RS resources and selects the CSI-RS resource index (CRI) with the largest RSRP for feedback. Based on the CRI fed back by the second communication node, the first communication node determines the analog beam used for data transmission, where N1 is a positive integer greater than 1. Sometimes, the second communication node also corresponds to multiple analog beams and needs to select one of them to receive the signal. In this case, the CRI may correspond to a beam pair, i.e., a transmit beam and a receive beam.

[0068] The second type of channel state information also includes a channel state information reference signal index (CRI), which is mainly used for beam selection in baseband precoding. When there are many baseband ports, in order to reduce the CSI-RS pilot overhead, the pilot ports of the CSI-RS need to be precoded to form precoded CSI-RS. Different baseband precodings correspond to a CSI-RS resource. The second communication node obtains multiple CSIs by measuring the CSI-RS resources corresponding to different precodings, and selects one of the CSI-RS resource indices, i.e., CRI, for feedback based on the CSI (such as CQI). The first communication node knows which precoding is more suitable for the current channel based on the feedback CRI.

[0069] For ease of distinction, the CRI in the first type of CSI is denoted as CRI1, and the CRI in the second type of CSI is denoted as CRI2.

[0070] To better understand some of the concepts and definitions in the embodiments of this invention, common concepts, definitions, regulations, and principles are introduced and explained here.

[0071] Frequency domain resources include one of the following: subcarriers, subcarrier groups (e.g., a Physical Resource Block (PRB) in LTE, which consists of 12 subcarriers), or subcarrier sets (e.g., subbands in LTE). A subcarrier group comprises multiple subcarriers, and a subcarrier set comprises multiple subcarrier groups. When feeding back channel state information, it is generally based on a certain frequency domain granularity. Generally, the smaller the frequency domain granularity of the feedback, the more accurately it describes the channel quality, but the feedback overhead will also be correspondingly larger. Conversely, the larger the frequency domain granularity of the feedback, the worse the quantization of the channel, but the lower the feedback overhead. Therefore, in wireless communication systems, such as LTE or NR, the 12 subcarriers in the frequency domain are called a Physical Resource Block (PRB), and k PRBs constitute a Subband (SB), where the size of k is related to the system bandwidth. Of course, different standards may have different division methods, but generally speaking, it includes multiple PRBs.

[0072] The first communication node needs to specify the bandwidth at which the second communication node will perform measurements and feed back the measured Channel State Information (CSI). CSI measurements are performed at a specific frequency domain granularity. For example, measurements based on broadband provide broadband CSI, measurements based on sub-band CSI provide sub-band CSI, and measurements based on a portion of the bandwidth provide partial bandwidth CSI. We call this the frequency domain granularity of the CSI measurement. Feedback of CSI based on broadband measurements is called broadband channel state information feedback; the channel state information fed back by broadband channel state information feedback is based on broadband measurements. Feedback of CSI based on sub-band measurements is called sub-band channel state information feedback; the channel state information fed back by sub-band channel state information feedback is based on a sub-band measurement, corresponding to one sub-band, and is called the sub-band corresponding to the sub-band channel state information feedback. Feedback of CSI based on partial bandwidth measurements is called partial bandwidth channel state information feedback; the channel state information fed back by partial bandwidth channel state information feedback is based on a partial bandwidth measurement, corresponding to one or more sub-bands, and is called the sub-band included in the partial bandwidth corresponding to the partial bandwidth channel state information feedback. Of course, different protocols may use different names, but as long as they have the same meaning, they are all within the scope of protection of this invention.

[0073] The beam described in this embodiment of the invention includes a transmit beam and a receive beam, precoding, a precoding matrix, and a precoding matrix index. The beam can be a resource (e.g., transmit-end precoding, receive-end precoding, antenna port, antenna weight vector, antenna weight matrix, etc.), and the beam number can be replaced with a resource index because the beam can be bound to some time-frequency code resources for transmission. The beam can also be a transmission (transmit / receive) method; the transmission method can include spatial division multiplexing, frequency domain / time domain diversity, etc.

[0074] The received beam indication refers to the fact that the transmitting end can indicate the beam using the current reference signal and antenna port, as well as the quasi-co-location indicator (QCL) assumption of the reference signal (or reference reference signal) and antenna port reported by the UE feedback. The received beam refers to the beam of the receiving end without indication, or the beam resources of the receiving end indicated by the current reference signal and antenna port, as well as the quasi-co-location indicator (QCL) of the reference signal (or reference reference signal) and antenna port reported by the UE feedback.

[0075] The beam pair includes a combination of a transmit beam indicator and a receive beam indicator.

[0076] The following section introduces some concepts such as CSI, CSI feedback, and CSI measurement.

[0077] The feedback of the second communication node CSI mainly exists in three ways in the time domain: periodic feedback, aperiodic feedback, and semi-continuous feedback.

[0078] Periodic feedback mainly involves the first communication node configuring a period and an offset, and the second communication node providing feedback on multiple subframes corresponding to the period and offset configured by the first communication node. For example, in LTE, the first communication node can configure the second communication node to measure and quantize channel information, and periodically provide feedback on the quantized CSI information through the Physical Uplink Control Channel (PUCCH).

[0079] The first communication node can also, when needed, aperiodically trigger the second communication node to report CSI information, including RI / PMI / CQI, where the Channel Quality Indicator (CQI) includes the reporting of WB CQI and SB CQI. This overcomes the problems of insufficient real-time performance of periodic feedback and the limitation of CSI quantization accuracy by control channel overhead. It only provides feedback on subframes configured or agreed upon by the first communication node.

[0080] Additionally, there is semi-persistent CSI feedback, which is similar to periodic CSI feedback, except that it occupies N>=1 consecutive feedback moments / cycles / subframes of periodic CSI feedback. The start and end positions of the feedback moments / cycles / subframes can be activated or deactivated by higher-layer signaling.

[0081] There are two categories for the measurement and feedback of channel state information: Class A and Class B. Both categories are semi-statically configured using RRC signaling.

[0082] Class A: The first communication node transmits CSI-RS, typically a non-precoded pilot. Users directly perform channel measurements and CSI quantization based on this CSI-RS pilot to obtain RI / PMI / CQI. This information is then fed back on the PUCCH or PUSCH, and the feedback includes a wide range of data, including broadband beam direction.

[0083] Class B: The CSI-RS transmitted by the first communication node is generally a precoded pilot. Users may need to select the precoded pilot first, and then perform quantization feedback of channel information based on the selected CSI-RS pilot, including CSI-RS resource indicator (CRI) selection information, and RI / PMI / CQI information corresponding to the selected CSI-RS measurement resource subset.

[0084] The various CSI parameter indications mentioned in this invention can also be called indices. They are completely equivalent concepts. For example, the precoding matrix indication can also be called the precoding matrix index, the channel rank indication can also be called the channel rank index, and the beam group indication can also be called the beam group index.

[0085] The feedback channel state information (or a parameter of the channel state information) mentioned in the embodiments of the present invention can also be described as transmitting the channel state information (or a parameter of the channel state information) or sending the channel state information (or a parameter of the channel state information).

[0086] Orthogonal Cover Code (OCC) is a set of orthogonal code sequences used to distinguish different ports, second communication nodes, and antennas in the code domain.

[0087] Hybrid Automatic Repeat Request (HARQ) includes two states: when the first or second communication node successfully receives data, it sends an Acknowledgement (ACK); otherwise, it sends a Negative Acknowledgement (NACK).

[0088] A scheduling request (SR) informs the first communication node that it has data transmission to handle and needs to allocate uplink resources. A buffer status report tells the first communication node how much buffer space is needed to send data.

[0089] The symbol referred to in this invention refers to a subframe or frame, a time unit in a time slot, such as OFDMA symbol, OFDM symbol, SC-FDM symbol, etc. in LTE or NR.

[0090] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the specific technical solutions of the invention will be further described in detail below with reference to the accompanying drawings of the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0091] Example 1

[0092] This invention provides a method for feedback of channel state information. Figure 1 This is a schematic diagram illustrating the implementation process of a channel state information feedback method provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the method includes the following steps:

[0093] Step S101: Determine the priority of CSI parameters in the CSI parameter set.

[0094] Here, step S101, determining the priority of CSI parameters in the CSI parameter set, can be implemented by the second communication node. In embodiments of the present invention and other embodiments thereof, the second communication node includes, but is not limited to, various receiving devices such as data cards, mobile phones, laptops, personal computers, tablets, personal digital assistants, and Bluetooth devices.

[0095] The first communication node includes, but is not limited to, macro base stations, micro base stations, pico base stations, home base stations, transmission nodes, and wireless hotspots.

[0096] It should be noted that in the downlink embodiments described herein, the first communication node may be exemplified as a base station, while the second communication node may be exemplified as a terminal or user. However, the method described herein can also be extended to the uplink. In this case, the first communication node can include various receiving devices such as data cards, mobile phones, laptops, personal computers, tablets, personal digital assistants, and Bluetooth devices, while the second communication node can include various types of base stations, such as macro base stations, micro base stations, pico base stations, home base stations, transmission nodes, and wireless hotspots.

[0097] It should be noted that the first communication node may also include various mobile terminals and communication terminals in Internet of Things, device-to-device, vehicle-to-vehicle, and other protocols.

[0098] Step S102: Determine the CSI parameters to be fed back and the time-frequency resource locations for feeding back the CSI parameters according to the priority of the CSI parameters.

[0099] Here, the CSI parameters to be fed back are the same CSI parameters fed back to the first communication node. Since the second communication node can only transmit one CSI parameter or a set of CSI parameters at a time in an uplink subframe, it is necessary to determine the CSI parameters to be fed back and the time-frequency resource locations for feeding back these parameters based on their priority. When a set of CSI parameters is fed back to the first communication node, it is necessary to determine each CSI parameter in that set.

[0100] Step S103: Feed back the CSI parameters to be fed back at the time-frequency resource location.

[0101] In this embodiment of the invention, the CSI parameters include at least one of the following: a first type of CSI parameter and a second type of CSI parameter, wherein:

[0102] The first type of CSI parameters includes at least one of the following parameters: Reference Signal Received Power (RSRP), Category 1 Channel State Information Reference Signal Resource Indicator (CRI1), Beam Group Index, Beam Index, Port Group Index, Level 1 RSRP, and Level 2 RSRP.

[0103] The second type of CSI parameters includes at least one of the following parameters: channel rank indicator RI, second type channel state information reference signal resource indicator CRI2, precoding matrix index, wideband channel quality indicator WB CQI, subband channel quality indicator SBCQI, first precoding matrix index, second precoding matrix index, beam information of linearly combined codebook, phase information of linearly combined codebook, and amplitude information of linearly combined codebook.

[0104] In other embodiments of the present invention, before determining the priority of CSI parameters in the CSI parameter set in step S101, the method further includes: obtaining the CSI parameters contained in the CSI parameter set by receiving higher-layer signaling configured by the first communication node.

[0105] In other embodiments of the present invention, step S101, which determines the priority of CSI parameters in the CSI parameter set, can be achieved in the following three ways:

[0106] The first method: Determine the priority of the CSI parameters requested by the first communication node according to preset rules;

[0107] In other words, the second communication node independently determines the priority of the CSI parameters requested by the first communication node. Then, the second communication node transmits the priority of the CSI parameters determined by the second communication node to the first communication node via higher-layer and / or physical-layer signaling carrying priority relationships. Correspondingly, the first communication node obtains the priority of the CSI parameters by receiving the higher-layer and / or physical-layer signaling carrying priority relationships sent by the second communication node, and determines the priority of the CSI parameters to be the priority of the CSI parameters on the first communication node's side.

[0108] In other embodiments of the present invention, the priority determined by the second communication node is as follows:

[0109] A.1) The CSI parameters only include the first type of CSI parameters. The second communication node determines the priority of the CSI parameters according to the preset rules as follows:

[0110] The priority of the beam group index is no lower than that of any one of RSRP, port index, beam index, first-level RSRP and second-level RSRP;

[0111] The priority of CRI1 is no lower than that of any one of RSRP, port index, beam index, first-level RSRP and second-level RSRP.

[0112] The priority of the first-level RSRP is higher than the priority of the second-level RSRP;

[0113] The priority of the first type of beam group with index value i is higher than that of the first type of beam group with index value i+1, where i is a natural number not less than 1;

[0114] The priority of the port index is no lower than the priority of any one of the parameters: beam index, RSRP, first-level RSRP, and second-level RSRP.

[0115] The priority of the beam index is no lower than the priority of any parameter of RSRP, first-level RSRP, or second-level RSRP.

[0116] A.2) The CSI parameters only include the second type of CSI parameters. The second communication node determines the priority of the CSI parameters according to the preset rules as follows:

[0117] The priority of CRI2 is not lower than the priority of RI;

[0118] The priority of the RI is higher than the priority of either the precoding matrix index or the channel quality information index.

[0119] The priority of the RI is not lower than the priority of the first precoding matrix index;

[0120] The priority of the precoding matrix index is no lower than the priority of the channel quality information index;

[0121] The first precoding matrix index has a higher priority than any one of the following: the second precoding matrix index, the beam group information of the linear merging codebook, the amplitude information of the linear merging codebook, and the phase information of the linear merging codebook.

[0122] The priority of the second precoding matrix index is no higher than the priority of any one of the beam group information, amplitude information, and phase information of the linearly combined codebook;

[0123] The priority of the beam information of the linear merging codebook is no lower than the priority of either the amplitude information or the phase information of the linear merging codebook.

[0124] The priority of the amplitude information in the linearly merged codebook is no lower than the priority of the phase information in the linearly merged codebook;

[0125] The priority of the beam information, the priority of the phase information, and the priority of the amplitude information of the linearly combined codebook are all no lower than the priority of either the broadband channel quality indicator or the subband channel quality indicator.

[0126] A.3) For CSI parameters, including first-type CSI parameters and second-type CSI parameters, the second communication node determines that the priority of the first-type CSI parameters is higher than the priority of the second-type CSI parameters according to the preset rules. The priority within the first-type CSI parameters is the same as the priority relationship specified in A.1), while the priority between the second-type CSI parameters is the same as the priority relationship specified in A.2).

[0127] In other words, the priority of any parameter of the first type of CSI parameter is higher than the priority of any parameter of the second type of CSI parameter, or

[0128] In the first type of CSI parameters, any parameter other than the second-level RSRP has a higher priority than any of the second type of CSI parameters, and the second-level RSRP has a lower priority than any of the second type of CSI parameters.

[0129] The second method is to determine the priority of the CSI parameters based on the received higher-layer signals and / or physical layer signaling carrying priority relationships.

[0130] Here, the second communication node determines the priority of the CSI parameters by receiving higher-layer and / or physical-layer signaling carrying priority relationships sent by the first communication node. In other words, the first communication node determines the priority of the CSI parameters according to preset rules and then sends this self-determined priority to the second communication node, carrying it in the higher-layer and / or physical-layer signaling. The second communication node parses the higher-layer and / or physical-layer signaling to obtain the priority of the CSI parameters.

[0131] It should be noted that the preset rules followed by the first communication node when determining the priority of the CSI parameters are the same as the priority relationships specified in A.1, A.2, and A.3 in the first method.

[0132] The third method: determine the priority of the CSI parameters according to the preset rules agreed upon in advance by the second communication node and the first communication node.

[0133] Here, the priority agreed upon by the first and second communication nodes follows the same preset rules as the priority relationships specified in A.1, A.2, and A.3 in the first method.

[0134] In other embodiments of the present invention, the priority can be divided according to the degree of latency sensitivity of CSI parameters, such as higher latency sensitivity has higher priority; or according to the importance of CSI parameters, such as important CSI parameters have higher priority, such as channel rank, beam index, CRI and other CSI parameters in practical applications have higher priority; or according to the order of scheduling of CSI parameters, in the event of a conflict, the CSI parameters that will be transmitted first have higher priority.

[0135] In actual implementation, determining the CSI parameters to be fed back based on the priority of the CSI parameters can be achieved through the following steps:

[0136] The parameters in the CSI parameter set are divided into C1 CSI parameter subsets.

[0137] The C2 subsets of CSI parameters with the highest priority in the CSI parameter subset are determined as the set of CSI parameters to be fed back. The priority of the CSI parameter subset is determined by the priority of the CSI parameter with the highest priority in the CSI parameter subset. C1 and C2 are positive integers, and C2 is less than or equal to C1. The CSI parameters to be fed back are all or part of the CSI parameters in the CSI parameter set.

[0138] To better understand how to determine the CSI parameters to be fed back based on the priority of the CSI parameters, this embodiment of the invention illustrates how to determine the conflict problem of CSI parameters based on CSI priority in the case of PUCCH or semi-continuous feedback.

[0139] The second communication node measures pilot signals through the channel, such as CSI-RS and / or interference measurement pilot signals, zero-power CSI-RS, and obtains a set of CSI parameters through these measurements, including RI, CRI2, the first precoding matrix i1, the second precoding matrix i2, and WB CQI. It may also include other CSI parameters, such as the first type of CSI parameters CRI1 and RSRP. Examples are not provided here.

[0140] The second communication node determines that the priority of CRI is not lower than the priority of RI, the priority of RI is higher than i1, the priority of i2 is higher than WB CQI, the priority of i1 is higher than i2, the priority of CRI1 is higher than RSRP, and RSRP is higher than CRI2. That is, CRI1>RSRP>CRI2>=RI>i1>i2>WB CQI. Here, > means that the priority of the CSI parameter on the left is higher than that of the CSI parameter on the right, and = means that the two CSI parameters have the same priority.

[0141] The second communication node can only transmit one or a set of CSIs mentioned above at a time in an uplink subframe. The content reported each time is called a report type, such as the report type in LTE. A report type includes one or more CSI parameters; for example, report type 1 is CRI, report type 2 is RI, and report type 3 is {CRI, RI}.

[0142] Report type 4 is {RI, i1}, report type 5 is {i2, WB CQI}, report type 6 is {CRI1}, and report type 7 is {RSRP}. These report type indices do not necessarily correspond one-to-one with a specific protocol (such as LTE); they are merely examples and may not necessarily include report types 1 through 5, and may also include other report types. Furthermore, when a report type includes multiple CSI parameters, the priority of this report type is determined by the highest priority CSI parameter within that report type. For example, the priority of report type 4 is the same as that of RI, while the priority of report type 5 is the same as that of i2.

[0143] In periodic or semi-continuous feedback, assuming the above report type is fed back in 5ms cycles, both RI and WB CQI+i2 need to be transmitted in a subframe. Therefore, the second communication node first determines to transmit report type 2, which includes RI, and then transmits report type 5 when the next cycle arrives.

[0144] If CRI1 and RI collide, meaning both report type 6 and report type 2 need to be transmitted on the same subframe, then the second communication node will determine that the report type corresponding to CRI1 should be fed back first.

[0145] Similarly, the first communication node can also know, based on the priority of CSI, that the second communication node chooses to report CSI parameters with higher priority.

[0146] In other embodiments of the present invention, determining the time-frequency resource location of the CSI parameter to be fed back based on the priority of the CSI parameter further includes:

[0147] The time-frequency resource location of the CSI parameter is determined based on the priority of the first signaling sent by the first communication node and the CSI parameter to be fed back, wherein the first signaling includes physical layer signaling and / or higher layer signaling, and the first signaling carries at least one of the following information:

[0148] The demodulation reference pilot pattern (DMRS), layer number, MIMO mode, time unit structure, subcarrier type, system bandwidth, carrier frequency modulation method, number of symbols occupied by DMRS, starting position of data sharing channel, transmission time length of data sharing channel, and orthogonal coverage code (OCC) of DMRS pilot.

[0149] It should be noted that, unless otherwise specified, the CSI parameters included in the embodiments of the present invention and other embodiments of the present invention may vary. For example, one or more CSI parameters of the first type may be CRI1 and / or RSRP, and one or more CSI parameters of the second type may be RI and / or PMI and / or CQI, etc. The specific CSI parameters included in the CSI parameters may be configured by the first communication node through higher-layer signaling. The second communication node configures the CSI parameters by receiving the CSI parameters in the higher-layer signaling and obtains the relevant CSI parameters according to the channel measurement pilot and / or interference measurement pilot. Of course, it can also be a set agreed upon by the first and second communication nodes. For example, when there is no higher-layer signaling configuration, which CSI parameters need to be fed back by default. This agreement may be related to the MIMO mode, such as which CSI parameters need to be fed back in open-loop MIMO, closed-loop MIMO, and semi-static open-loop MIMO; it may also be related to the number of antennas, such as which CSI parameters need to be fed back in 4-antenna mode and 8-antenna mode; it may also be related to the transmission mode, such as which CSI parameters need to be fed back in transmission modes 1 to 10 in LTE.

[0150] In this embodiment of the invention, the priority of CSI parameters in the Channel State Information (CSI) parameter set is first determined. Then, based on the priority of the CSI parameters, the CSI parameters to be fed back and the time-frequency resource locations for feeding back the CSI parameters to be fed back are determined. The CSI parameters to be fed back are then fed back at the time-frequency resource locations. This establishes the priority relationships between the newly introduced CSI parameters and the original Release 13-related CSI parameters, as well as the priority relationships among the newly introduced CSI parameters themselves. Based on these priority relationships, the time-frequency resource locations for feeding back the CSI parameters are determined, improving the accuracy of channel state information transmission and thus enhancing system performance.

[0151] Example 2

[0152] Based on the foregoing embodiments, an embodiment of the present invention provides an implementation method for determining the time-frequency resource location for feeding back a CSI parameter to be fed back according to the priority of the CSI parameter to be fed back in a method for feeding back channel state information. In the embodiments of the present invention and other embodiments, determining the time-frequency resource location of the CSI parameter can also be described as CSI parameter mapping. CSI parameter mapping refers to modulating the modulation symbol corresponding to the CSI parameter onto a resource unit (Resource Element, RE) for transmitting the CSI parameter.

[0153] Regarding the differences in different demodulation reference pilot patterns (DMRS patterns), the mapping of CSI parameters also has differences. Generally speaking, there are the following rules I) and II):

[0154] Rule I) For the same carrier, if N1 < N2, the priority of the CSI parameter on the i-th symbol is not lower than the priority of the CSI parameter on the j-th symbol; if N1 > N2, the priority of the CSI parameter on the i-th symbol is not higher than the priority of the CSI parameter on the j-th symbol; if N1 = N2 and i < j, the priority of the CSI parameter on the i-th symbol is not lower than the priority of the CSI parameter on the j-th symbol; if N1 = N2 and i > j, the priority of the CSI parameter on the i-th symbol is not higher than the priority of the CSI parameter on the j-th symbol;

[0155] Among them, N1 is the minimum value of the first index difference set, and the first index difference set is composed of the absolute value of the difference between the i-th symbol and the symbol index where the Nd-th DMRS is located; N2 is the minimum value of the second index difference set, and the second index difference set is composed of the absolute value of the difference between the j-th symbol and the symbol index where the Nd-th DMRS is located. i and j are non-negative integers less than Ns, Nd is a positive integer less than Ns, and Ns is the number of symbols in a subframe. That is, N1 = min(|k - i|), N2 = min(|k - j|), i, k, and j are all non-negative integers less than Ns, k is one or more symbol indexes of the symbol where the DMRS is located, |c| represents taking the absolute value of c, and min(C) represents taking the minimum value of the C set;

[0156] And / or

[0157] Rule II) For different carriers of the same symbol, the priority of the CSI parameter transmitted on the m1-th carrier is not lower than the priority of the CSI parameter transmitted on the m2-th carrier, where m1 < m2, and m1 and m2 are positive integers.

[0158] In the above rules I) and II), the following points need to be noted: 1), when N1 or N2 is 0, it means that the CSI parameter on the i-th symbol or the j-th symbol is in the same symbol as the symbol where the DMRS is located, that is, as shown in Figures 3a to 3g it is shown that the DMRS is discrete in the frequency domain. 2) Assume that the symbol index where the DMRS is located is k. If the k-1 or k+1 symbol is a Physical Downlink Control Channel (PDCCH) or a Guard Period (GP) or a PUCCH, then the k-1 or k-1 symbol does not map or transmit the CSI parameter. 3) If the symbol where the CSI parameter is located has the same symbol index as the symbol where the DMRS is located, then the carrier where the DMRS is located cannot map the CSI parameter anymore. 4) The carrier used to transmit the DMRS, CSI-RS, sounding reference signal, and synchronization signal is not used to transmit the CSI parameter.

[0159] The following examples are used to illustrate the above rules I) and II), see Examples 1 to 4:

[0160] Example 1: The priority of the CSI parameter transmitted in the same symbol as the DMRS is higher than the CSI parameter transmitted in the symbol before the symbol where the DMRS is located or the symbol after the symbol where the DMRS is located.

[0161] Example 2: If the DMRS occupies multiple symbols, the priority of the CSI parameter transmitted in the symbol where the N1-th DMRS is located is not lower than the priority of the CSI parameter transmitted in the symbol where the N2-th DMRS is located, where N1 < N2, and N1 and N2 are positive integers.

[0162] Example 3: The priority of the CSI parameter transmitted in the N3-th symbol that does not include the DMRS is not lower than the priority of the CSI parameter transmitted in the N4-th symbol that does not include the DMRS, N3 < N4, and N3 and N4 are positive integers.

[0163] Example 4: The priority of the CSI parameter transmitted on the m1-th carrier is not lower than the priority of the CSI parameter transmitted on the m2-th carrier, where m1 < m2, and m1 and m2 are positive integers.

[0164] In other embodiments of the present invention, the time-frequency resource position is the time-frequency resource position of the CSI parameter relative to the DMRS. Determining the time-frequency resource position of the to-be-fedback CSI parameter includes:

[0165] For any symbol k containing a DMRS, if the DMRS of symbol k is discrete in the frequency domain, the CSI parameters are mapped in the order k, k-1, k+1, ..., k-N1, k+N1 according to the priority order of the CSI parameters. Furthermore, if a symbol with an index of k-N1 is used to transmit downlink control channels or guard GP slots, then symbols with indexes less than k-N1 are not used to transmit CSI parameters; if a symbol with an index of k+N1 is used to transmit uplink control channels, then symbols with indexes greater than k+N1 are not used to transmit CSI parameters, where N1 is a positive integer and less than Ns / 2, and Ns is the number of symbols contained in a subframe; or...

[0166] For any symbol k containing DMRS, if the DMRS of symbol k occupies all subcarriers in the frequency domain, the CSI parameters are mapped in the order of k-1, k+1, ..., k-N1, k+N1 according to the priority order of the CSI parameters. Furthermore, if a symbol with a symbol index of k-N1 is used to transmit downlink control channels or guard time slots (GP), then symbols with symbol indices less than k-N1 are not used to transmit CSI parameters. If a symbol with a symbol index of k+N1 is used to transmit uplink control channels, then symbols with symbol indices greater than k+N1 are not used to transmit CSI parameters, and symbols used to transmit DMRS are not used to transmit CSI parameters. Here, N1 is a positive integer and less than Ns / 2, where Ns is the number of symbols contained in a subframe.

[0167] In other embodiments of the present invention, the time-frequency resource location is the time-frequency resource location of the CSI parameter relative to the DMRS. For different DMRS patterns, determining the time-frequency resource location of the CSI parameter according to the priority of the CSI parameter fed back to the first communication node further includes: determining an ordered set of symbols for transmitting the CSI parameter according to the DMRS pattern; determining the mapping relationship between the CSI parameter to be fed back and the symbols in the ordered set of symbols for transmitting the CSI parameter according to the priority of the CSI parameter to be fed back, wherein the element index value in the ordered set corresponding to the high-priority CSI parameter is less than the element index value in the ordered set corresponding to the low-priority CSI parameter.

[0168] The first or second communication node obtains an ordered set of symbols based on the DMRS diagram. Each element in the ordered set is an index of a symbol, and the elements in the ordered set are sorted by their indices. For example, the ordered set is A =<a1,a2,a3,…,an> Let ai represent the i-th element of the ordered set, where i = 1, 2, 3, ..., n, and n is the number of elements in ordered set A. Its content is the symbol index, ranging from 0 to Ns, where Ns is the number of symbols in a subframe. For example, in LTE, this value is 14 symbols in a normal cyclic prefix subframe. The ordered set is sorted according to the element index i. Below are some examples of determining the ordered set based on DMRS:

[0169] For a DMRS pattern where DMRS is transmitted only in symbol k and occupies the entire symbol, if the (k-1)th symbol is used to transmit the Physical Downlink Control Channel (PDCCH) or GP, then the ordered set of symbols is:<k+1,k+2,k+3,…,Ns> If the (k+1)th symbol is the Physical Uplink Control Channel (PUCCH), then the ordered set of symbols is:<k-1,k-2,k-3,…,0> Otherwise, the ordered set of symbols is {k-1, k+1, k-2, k+2, k-3, k+3>;

[0170] For a DMRS pattern where DMRS is transmitted only in symbol k and is discrete in the frequency domain, if the (k-1)th symbol is used to transmit either PDCCH or GP, then the ordered set of symbols is:<k,k+1,k+2,k+3,…,Ns> If the (k+1)th symbol is PUCCH, then the ordered set of symbols is<k,k-1,k-2,k-3,…,0> Otherwise, the symbolic ordered set is<k,k-1,k+1,k-2,k+2,k-3,k+3> ;

[0171] For a DMRS pattern where DMRS is transmitted only in symbols k1 and k2 and DMRS fills the entire symbol, if the (k1-1)th symbol is used to transmit PDCCH or GP, then the ordered set of symbols is:<k1+1,k2-1,k2+1,k1+2,k2-2,k2+2> If the (k1-1)th symbol is used to transmit PDCCH or GP and the (k2+1)th symbol is PUCCH, then the ordered set of symbols is:<k1+1,k2-1,k2+1,k1-2,k2-2,k2+2> Otherwise, the symbolic ordered set is<k1-1,k1+1,k2-1,k2+1,k1-2,k1+2,k2-2,k2+2> ;

[0172] For a DMRS pattern where DMRS is transmitted only in symbols k1 and k2 and the DMRS frequency domain is discrete, if the (k1-1)th symbol is used to transmit PDCCH or GP, then the ordered set of symbols is:<k1,k1+1,k2-1,k2+1,k1+2,k2-2,k2+2> If the (k1-1)th symbol is used to transmit PDCCH or GP and the (k2+1)th symbol is PUCCH, then the ordered set of symbols is:<k1,k1+1,k2-1,k2+1,k1-2,k2-2,k2+2> Otherwise, the symbolic ordered set is<k1,k1-1,k1+1,k2-1,k2+1,k1-2,k1+2,k2-2,k2+2> ;

[0173] For a DMRS that is transmitted only in symbols k1, k2, k3, and k4, and the DMRS fills the entire symbol, and k2 = k1 + 1 and k4 = k3 + 1, if the (k1-1)th symbol is a control channel or the symbol containing the GP, the ordered set of symbols is:<k2+1,k3-1,k4+1,k2+2,k3-2,k4+2> If k4+1 is PUCCH, then the ordered set of symbols is<k1-1,k2+1,k3-1,k1-2,k2+2,k3-2> Otherwise, the symbolic ordered set is<k1-1,k2+1,k3-1,k4+1,k1-2,k2+2,k3-2,k4+2> ;

[0174] For a DMRS that transmits only in symbols k1, k2, k3, and k4 and is discrete in the frequency domain, with k2 = k1 + 1 and k4 = k3 + 1, if the (k1-1)th symbol is the one containing the PDCCH or GP, the ordered set of symbols is:<k1,k2,k3,k4,k2+1,k3-1,k4+1,k2+2,k3-2,k4+2> If the (k4+1)th symbol is PUCCH, then the ordered set of symbols is<k1,k2,k3,k4,k1-1,k2+1,k3-1,,k1-2,k2+2,k3-2> Otherwise, the symbolic ordered set is<k1,k2,k3,k4,k1-1,k2+1,k3-1,k4+1,k1-2,k2+2,k3-2,k4+2> ;

[0175] For a pattern where DMRS is transmitted only in symbols k1, k2, k3, and k4, and the DMRS fills the entire symbol, and k1, k2, k3, and k4 are discrete, if the (k1-1)th symbol is the symbol containing the PDCCH or GP, the ordered set of symbols is:<k1+1,k2-1,k2+1,k3-1,k3+1,k4-1,k4+1> If the (k4+1)th symbol is PUCCH, then the ordered set of symbols is<k1+1,k2-1,k2+1,k3-1,k3+1,k4-1> Otherwise, the symbolic ordered set is<k1-1,k1+1,k2-1,k2+1,k3-1,k3+1,k4-1,k4+1> ;

[0176] For a pattern where DMRS is transmitted only in symbols k1, k2, k3, and k4, and the DMRS fills the entire symbol, and k1, k2, k3, and k4 are discrete, if the (k1-1)th symbol is the symbol containing the PDCCH or GP, the ordered set of symbols is:<k1,k2,k3,k4,k1+1,k2-1,k2+1,k3-1,k3+1,k4-1,k4+1> If the (k4+1)th symbol is PUCCH, then the ordered set of symbols is<k1,k2,k3,k4,k1+1,k2-1,k2+1,k3-1,k3+1,k4-1> Otherwise, the symbolic ordered set is<k1,k2,k3,k4,k1-1,k1+1,k2-1,k2+1,k3-1,k3+1,k4-1,k4+1> .

[0177] Here, we will use several specific DMRS patterns to illustrate the mapping relationships of some CSI parameters.

[0178] In this example, without loss of generality, the first communication node is configured with NCSI = 4 CSI parameters or a group of CSI parameters jointly coded. Since the group of CSI parameters is jointly coded, it is treated as a single CSI parameter, and its priority is determined by the highest priority CSI parameter in the group. Among these NCSI CSI parameters, they are prioritized as follows: 1st priority CSI parameter (e.g., CRI1), 2nd priority CSI parameter (e.g., RI), 3rd priority CSI parameter (e.g., i11, i12), 4th priority CSI parameter (e.g., CQI, i2). The priority is relative to the CSI parameters to be fed back. Here, the i-th priority CSI parameter can also contain other CSI parameters; this is just an example, i = 1, 2, 3, 4.

[0179] In the embodiments of this invention, the symbols represent the time-domain resources of wireless resources, which can be an Orthogonal Frequency Division Multiplexing (OFDM), a Single-Carrier Frequency Division Multiple Access (SC-FDMA), or an Orthogonal Frequency Division Multiple Access (OFDMA).

[0180] The following diagram illustrates the mapping process of CSI parameters.

[0181] DMRS Pattern 1: Only the k-th OFDM symbol has DMRS, and as follows Figures 2a-2c As shown, DMRS continuously occupies the entire symbol in the frequency domain.

[0182] exist Figure 2a In the DMRS pattern shown, the (k-1)th symbol is used to transmit the PDCCH channel or GP. The CSI parameters are mapped according to priority from high to low, only symbols with symbol indices greater than k are mapped, and one symbol is mapped in the order of k+1, k+2, k+3, k+4 before another symbol is mapped.

[0183] exist Figure 2b In the DMRS pattern shown, neither the (k-1)th nor the (k+1)th symbol is used to transmit the control channel, PUCCH, or GP. Therefore, in order of priority from high to low, the symbols are mapped one after another in the order of k-1, k+1, k-2, k-2.

[0184] exist Figure 2c In the DMRS pattern shown, the (k+1)th symbol is used to transmit PUCCH. The CSI parameters are mapped only to symbols with a symbol index less than k, from highest to lowest priority, and in the order of k-1, k-2, k-3, k-4, mapping one symbol at a time before moving on to the next. For the same symbol, mapping is also done in order of priority, from smallest to largest carrier index.

[0185] DMRS Pattern 2: Only the k-th OFDM symbol has DMRS, and as follows Figures 3a-3c As shown, DMRS is a discrete symbol in the frequency domain.

[0186] In such Figure 3aIn the DMRS diagram shown, the (k-1)th symbol is used to transmit PDCCH or GP. The CSI parameters are mapped only to symbols with a symbol index greater than or equal to k, in descending order of priority. Furthermore, the mapping is performed in the order of k, k+1, k+2, k+3, completing one symbol before mapping another.

[0187] In such Figure 3b In the DMRS pattern shown, neither the (k-1)th nor the (k+1)th symbol is used to transmit PDCCH, PUCCH, or GP. Therefore, in order of priority from high to low, one symbol is mapped before another is mapped.

[0188] In such Figure 3c In the DMRS pattern shown, the (k+1)th symbol is used to transmit PUCCH. Therefore, CSI parameters are mapped only to symbols with symbol indices less than or equal to k, in descending order of priority, following the order k, k-1, k-2, k-3, k-4, mapping one symbol at a time. Within the same symbol, mapping is also done in ascending order of priority, starting from the smallest carrier index. If a symbol contains a DMRS, CSI parameters are not mapped to the carrier containing that DMRS.

[0189] DMRS Pattern 3: k1 and k2 OFDM symbols have DMRS, and as follows Figures 2d to 2e As shown, DMRS continuously occupies the entire symbol in the frequency domain.

[0190] exist Figure 2d In the DMRS diagram shown, the k1-1th symbol is used to transmit PDCCH or GP. The CSI parameters are mapped in descending order of priority, and in the order of k1+1, k2-1, k2+1, k1+2, k2-2, k2+2, mapping one symbol before mapping another.

[0191] exist Figure 2e In the DMRS pattern shown, if symbol k2+1 is used to transmit PUCCH and symbol k1-1 is used to transmit PDCCH or GP, then the CSI parameters are mapped one symbol at a time in descending order of priority, following the sequence k1+1, k2-1, k2+1, k1-2, k2-2, k2+2. If symbol k-1 is not used to transmit PDCCH or GP, and symbol k2+1 is not used to transmit PUCCH, then one symbol is mapped one at a time in the sequence k1-1, k1+1, k2-1, k2+1. For the same symbol, mapping is also done in ascending order of priority, starting from the smallest carrier index.

[0192] DMRS Pattern 4: k1 and k2 OFDM symbols have DMRS, and as shown in the diagram... Figures 3d-3e As shown, DMRS is discrete in the frequency domain.

[0193] exist Figure 3d In the DMRS diagram shown, the k1-1th symbol is used to transmit the PDCCH channel or GP. The CSI parameters are mapped in descending order of priority, and in the order of symbols k1, k2, k1+1, k2-1, k2+1, k1+2, k2-2, k2+2, mapping one symbol at a time before mapping another.

[0194] exist Figure 3e In the DMRS pattern shown, the (k2+1)th symbol is used to transmit PUCCH, and the (k1-1)th symbol is used to transmit PDCCH or GP. The CSI parameters are mapped one symbol at a time, according to priority, in the order k1, k2, k1+1, k2-1, k2+1, k1-2, k2-2, k2+2. If the (k-1)th symbol is not used to transmit PDCCH or GP, and the (k2+1)th symbol is not used to transmit PUCCH, then the mapping proceeds one symbol at a time, following the order k1, k2, k1-1, k1+1, k2-1, k2+1. For the same symbol, mapping is also done in priority order, from smallest to largest carrier index.

[0195] DMRS Pattern 5: OFDM symbols k1, k2, k3, and k4 have DMRS, and as shown in the diagram... Figures 2f to 2g As shown, DMRS continuously occupies the entire symbol in the frequency domain.

[0196] exist Figure 2f In the DMRS diagram shown, k1 and k2, k3 and k4 are consecutively indexed symbols, i.e., k2 = k1 + 1, k4 = k3 + 1. The CSI parameters are mapped one symbol at a time, from highest to lowest priority, following the symbol sets k1-1, k2+1, k3-1, k4+1, k1-2, k2+2, k3-2, k4+2. If the (k1-1)th symbol is used to transmit PDCCH or GP, then the symbol set does not include k1-1 and k1-2. If the (k4+1)th symbol is used to transmit PUCCH, then the symbol set does not include the symbols k4+1 and k4+2.

[0197] exist Figure 2gIn the DMRS pattern shown, symbols k1, k2, k3, and k4 are discrete. The CSI parameters are mapped sequentially from highest to lowest priority, following the symbol sets k-1, k1+1, k2-1, k2+1, k3-1, k3+1, k4-1, and k4+1, mapping one symbol at a time. If symbol k1-1 is used to transmit PDCCH or GP, then symbol set k1-1 is not included; similarly, if symbol k4+1 is used to transmit PUCCH, then symbol set k4+1 is not included. For the same symbol, mapping is also performed in priority order, from smallest to largest carrier index.

[0198] DMRS Pattern 6: OFDM symbols k1, k2, k3, and k4 have DMRS, and as shown in the diagram... Figures 3f to 3g As shown, DMRS is discrete in the frequency domain.

[0199] exist Figure 3f In the DMRS diagram shown, symbols k1 and k2, k3 and k4 are consecutively indexed, i.e., k2 = k1 + 1, k4 = k3 + 1. The CSI parameters are mapped one symbol at a time, from highest to lowest priority, following the symbol sets k1, k2, k3, k4, k1-1, k2+1, k3-1, k4+1, k1-2, k2+2, k3-2, k4+2. If symbol k1-1 is used to transmit PDCCH or GP, then the symbol set does not include k1-1 and k1-2. If symbol k4+1 is used to transmit PUCCH, then the symbol set does not include symbols k4+1 and k4+2.

[0200] exist Figure 3g In the DMRS pattern shown, symbols k1, k2, k3, and k4 are discrete. The CSI parameters are mapped sequentially from highest to lowest priority, following the symbol sets k1, k2, k3, k4, k1-1, k1+1, k2-1, k2+1, k3-1, k3+1, k4-1, and k4+1, mapping one symbol at a time. If symbol k1-1 is used to transmit PDCCH or GP, then symbol set k1-1 is not included; similarly, if symbol k4+1 is used to transmit PUCCH, then symbol set k4+1 is not included. For the same symbol, mapping is also performed in priority order, from smallest to largest carrier index.

[0201] It should be noted that the CSI parameter mapping mentioned here refers to modulating the modulation symbol corresponding to the CSI parameter onto the resource element (RE) used to transmit the CSI parameter. It can also be described as determining the time-frequency resource location of the CSI parameter and transmitting the CSI parameter at that time-frequency resource location.

[0202] In addition, the mapping process of the CSI parameters described above can also be applied to the mapping process of the second uplink control channel parameters. Here, the second uplink control channel parameters are other uplink control channel parameters besides CSI, including but not limited to one of the following parameters: ACK / NACK confirmation, scheduling request (SR), and buffer status report (BSR).

[0203] The mapping process simply involves replacing the CSI parameters in this embodiment with the second uplink control channel parameters. The second uplink control channel parameters generally have a higher priority than the CSI parameters.

[0204] It should be noted that the above mapping process for CSI parameters can also be applied to the mapping process that includes the second uplink control channel parameters and CSI parameters. Here, the second uplink control channel parameters are other uplink control channel parameters besides CSI.

[0205] The mapping process simply involves replacing the CSI parameters in this embodiment with the second uplink control channel parameters and the CSI parameters. The second uplink control channel parameters generally have a higher priority than the CSI parameters. That is, the second uplink control parameters are mapped first, and then the CSI parameters are mapped.

[0206] This invention provides a method for determining the priority of CSI parameters to be fed back and the time-frequency resource location of the CSI parameters to be fed back. Since the pilot design of DMRS is relatively complex, various patterns are designed based on characteristics such as time-selective fading, frequency-selective fading, and frame structure, making the design of the positional relationship used for feeding back CSI parameters also relatively complex. Therefore, this invention also provides a method for determining the time-frequency resource location of the CSI parameters to be fed back for different DMRS patterns. Using the method for determining the time-frequency resource location of the CSI parameters to be fed back provided by this invention, CSI parameters can be fed back with reasonable overhead.

[0207] Example 3

[0208] Based on the foregoing embodiments, this embodiment of the invention further provides an implementation method for determining the time-frequency resource location of the CSI parameter to be fed back based on the priority of the CSI parameter to be fed back in the channel state information feedback method. In this embodiment of the invention, the time-frequency resource location relationship between the CSI parameter and the DMRS pattern is implicitly determined based on higher layer or physical layer signaling.

[0209] The time-frequency resource location for feeding back the CSI parameters is determined based on the priority of the first signaling sent by the first communication node and the CSI parameters to be fed back. The first signaling includes physical layer signaling and / or higher layer signaling, and carries at least one of the following information:

[0210] The demodulation reference pilot pattern (DMRS), layer number, MIMO mode, time unit structure, subcarrier type, system bandwidth, carrier frequency modulation method, number of symbols occupied by DMRS, start position of the data sharing channel, transmission duration of the data sharing channel, and orthogonal coverage code (OCC) of the DMRS pilot, wherein:

[0211] The DMRS pattern, also known as the demodulation reference signal pattern, mainly refers to the graphic representation of the resource units occupied by the DMRS within a Physical Resource Block (PRB), such as... Figures 2a to 2g ,or Figures 3a to 3g A PRB is a resource unit that includes multiple symbols and multiple subcarriers. For example, in NR or LTE, a PRB includes 14 symbols and 12 carriers.

[0212] The number of layers refers to the number of data layers transmitted simultaneously in multi-antenna technology.

[0213] The MIMO mode refers to various MIMO transmission modes defined in multi-antenna technology transmission. For example, in LTE, transmission mode 2 is space-frequency diversity, transmission mode 3 is open-loop spatial multiplexing or open-loop MIMO technology, transmission mode 4 is closed-loop spatial multiplexing, transmission mode 5 is multi-user MIMO, transmission mode 6 is closed-loop spatial multiplexing for a single data stream, transmission modes 7 and 8 are single-stream and dual-stream beamforming, respectively, while transmission mode 9 supports up to 8 layers of spatial multiplexing and can realize adaptive switching between users and multiple users, adaptive switching of the number of data layers, and supports open-loop MIMO and closed-loop MIMO modes. Transmission mode 10 supports joint transmission of multiple transmission nodes.

[0214] In the TDD system, the time unit structure consists of f1 downlink symbols, f2 GP symbols, and f3 uplink symbols. Here, f = f1 + f2 + f3 is the number of symbols in a subframe, which is generally 14 under normal cyclic prefix. Different compositions of f1, f2, and f3 will form different time unit structures.

[0215] The carrier type mainly refers to the carrier type used in the uplink, including SC-FDMA and OFDMA;

[0216] The system bandwidth refers to the total number of physical resource blocks contained in the wireless communication system;

[0217] In NR, the number of symbols occupied by DMRS is 1 to 4.

[0218] The transmission duration of the data sharing channel refers to the symbol length from the start to the end of the transmission. This value may vary depending on the time unit structure.

[0219] The second communication node receives the first signaling and determines the time-frequency resource location of the DMRS sent by the first communication node based on the information carried in the first signaling. After determining the time-frequency resource location for sending the DMRS, it determines the time-frequency resource location for transmitting the CSI parameters according to the priority of the CSI parameters and the method provided in other embodiments of the present invention, and maps the CSI parameters to the time-frequency resource location for transmitting the CSI parameters to transmit the CSI parameters.

[0220] The first communication node determines the time-frequency resource location for the second communication node to transmit CSI parameters based on the first signaling, and determines the CSI parameter content represented by the time-frequency resource location based on the priority of the CSI parameters, and receives the CSI parameters at the CSI time-frequency resource location.

[0221] It should be noted that the mapping process of the CSI parameters described above can also be applied to the mapping process of the second uplink control channel parameters. Here, the second uplink control channel parameters are other uplink control channel parameters besides CSI, including but not limited to one of the following parameters: ACK / NACK confirmation, scheduling request (SR), and buffer status report (BSR).

[0222] The mapping process simply involves replacing the CSI parameters in this embodiment with the second uplink control channel parameters. The second uplink control channel parameters generally have a higher priority than the CSI parameters.

[0223] It should be noted that the above mapping process for CSI parameters can also be applied to mapping processes that include the second uplink control channel parameters and CSI parameters. Here, the second uplink control channel parameters are other uplink control channel parameters besides CSI.

[0224] To more clearly illustrate how the different contents of the first signaling affect the CSI parameter mapping, different examples are described below.

[0225] Example 1: The first signaling is used to indicate different DMRS patterns.

[0226] Here, the first signaling is used to indicate the DMRS pattern; different values ​​of S may correspond to different DMRS patterns. For example, when S=1, the DMRS pattern is as follows: Figure 2a As shown, the second or first communication node maps the CSI parameters according to their priority, in the order of symbols k+1, k+2, k+3, k+4, mapping one symbol at a time before moving on to the next, where k is the index of the symbol containing the DMRS. When S=2, the DMRS pattern is as follows. Figure 2c As shown, the second or first communication node maps the CSI parameters in the order of symbols k-1, k-2, k-3, k-4 according to the priority of the CSI parameters, and then maps the next symbol after mapping one symbol, where K is the index of the symbol where DMRS is located.

[0227] Example 2: The first signaling is used to indicate the number of layers, i.e., the number of layers for data transmission.

[0228] Here, the first signaling is used to indicate the number of layers; different values ​​of S may correspond to different numbers of layers. For example, S=1 indicates that there is 1 layer, and the DMRS diagram is as follows: Figure 2a As shown, the second or first communication node maps the CSI parameters according to their priority, in the order of symbols k+1, k+2, k+3, k+4, mapping one symbol at a time before moving on to the next, where k is the index of the symbol containing the DMRS. When S=2, it indicates Layer=2, and the DMRS pattern is as follows. Figure 2d As shown, the second or first communication node maps the CSI parameters according to the priority of the CSI parameters in the order of symbols k1+1, k2-1, k2+1, k1+2, k2-2, k2+2, and so on. After mapping one symbol, it maps the next symbol. Here, k1 is the index of the symbol where the first group of DMRS is located, and k2 is the index of the symbol where the second group of DMRS is located.

[0229] Example 3: The first signaling is used to indicate the MIMO transmission mode.

[0230] Here, the first signaling is used to indicate the transmission mode; different values ​​of S may correspond to different transmission modes. For example, S=7 indicates transmission mode seven, and the DMRS diagram is as follows: Figure 2a As shown, the second or first communication node maps the CSI parameters according to their priority, in the order of symbols k+1, k+2, k+3, k+4, mapping one symbol at a time before moving on to the next, where k is the index of the symbol containing the DMRS. When S=8, it represents transmission mode 8, and the DMRS pattern is as follows. Figure 2dAs shown, the second or first communication node maps the CSI parameters according to the priority of the CSI parameters in the order of symbols k1+1, k2-1, k2+1, k1+2, k2-2, k2+2, and so on. After mapping one symbol, it maps the next symbol. Here, k1 is the index of the symbol where the first group of DMRS is located, and k2 is the index of the symbol where the second group of DMRS is located.

[0231] Example 4: The first signaling is used to indicate the time unit structure.

[0232] Here, the first signaling is used to indicate the time unit structure; different values ​​of S may correspond to different time unit structures. For example, S=1 indicates time unit structure 1, and the DMRS diagram is as follows. Figure 2a As shown, the second or first communication node maps the CSI parameters according to their priority, in the order of symbols k+1, k+2, k+3, k+4, mapping one symbol at a time before moving on to the next, where k is the index of the symbol containing the DMRS. When S=2, it represents time unit structure 2, and the DMRS diagram is as follows. Figure 2c As shown, the second or first communication node maps the CSI parameters in the order of symbols k-1, k-2, k-3, k-4 according to the priority of the CSI parameters, and then maps the next symbol after mapping one symbol, where k is the index of the symbol where the DMRS is located.

[0233] Example 5: The first signaling is used to indicate the carrier type.

[0234] Here, the first signaling is used to indicate the carrier type; different values ​​of S may correspond to different carrier types. For example, S=1 indicates SC-FDMA, and the DMRS pattern is as follows: Figure 2a As shown, the second or first communication node maps the CSI parameters according to their priority, in the order of symbols k+1, k+2, k+3, k+4, mapping one symbol at a time before moving on to the next, where k is the index of the symbol containing DMRS. When S=2, it represents OFDMA, and the DMRS pattern is as follows. Figure 3a As shown, the second or first communication node maps the CSI parameters in the order of symbols k, k-1, k-2, k-3, k-4 according to the priority of the CSI parameters, and then maps the next symbol after mapping one symbol, where k is the index of the symbol where the DMRS is located.

[0235] Example 6: The first signaling is used to indicate the system bandwidth.

[0236] System bandwidth primarily affects the number of symbols used to transmit CSI parameters. When system bandwidth is small, there are fewer PRBs (Physical Backbone Buffers) used for transmitting Physical Uplink Shared Data, and consequently, fewer PRBs used for transmitting CSI parameters. This means fewer carriers in the frequency domain. If the number of CSI parameters remains constant, a system with smaller bandwidth will require more symbols to transmit CSI parameters than a system with larger bandwidth. For example, for... Figure 2a The 2.5M system uses symbols k+1, k+2, k+3, and k+4 to transmit CSI parameters, while the 10M system only needs to use k+1 and k+2 to transmit CSI parameters. Here, k is the index of the symbol where DMRS is located.

[0237] Example 7: The first signaling is used to indicate the frequency hopping mode of the carrier.

[0238] Different carrier frequency hopping methods result in different DMRS patterns, and also different numbers of REs used for transmitting PDSCH or CSI parameters on the DMRS symbol. For example, S=1 indicates carrier frequency hopping mode 1. Figure 3d As shown in the figure, for example, S=2 represents carrier frequency hopping mode 2, such as Figure 3h As shown, the second or first communication node maps the CSI parameters according to their priority in the order of symbols k1+1, k2-1, k2+1, k1+2, k2-2, k2+2, completing the mapping for one symbol before moving on to the next. Different frequency modulation modes result in different mappings, primarily manifested in mapping to different subcarriers in the frequency domain, or in the different numbers of subcarriers used for mapping the CSI parameters. Here, k1 is the index of the symbol containing the first group of DMRS, and k2 is the index of the symbol containing the second group of DMRS.

[0239] Example 8: The first signaling is used to indicate the number of symbols occupied by DMRS.

[0240] Here, the first signaling is used to indicate the number of symbols occupied by different DMRSs, and different values ​​of S may correspond to different number of symbols. For example, S=1 indicates that there is only one DMRS, and the pattern of the DMRS is as follows. Figure 2a As shown, the second or first communication node maps the CSI parameters in the order of symbols k+1, k+2, k+3, k+4 according to the priority of the CSI parameters, mapping one symbol at a time before moving on to the next, where k is the index of the symbol containing the DMRS. When S=2, it means that only 2 symbols have DMRS, and the pattern of the DMRS is as follows. Figure 2dAs shown, the second or first communication node maps the CSI parameters according to the priority of the CSI parameters in the order of symbols k1+1, k2-1, k2+1, k1+2, k2-2, k2+2, and so on. After mapping one symbol, it maps the next symbol. Here, k1 is the index of the symbol where the first group of DMRS is located, and k2 is the index of the symbol where the second group of DMRS is located.

[0241] Example 9: The first signaling is used to indicate the starting position of the data sharing channel.

[0242] Here, the first signaling is used to indicate the starting position of the data sharing channel. Different values ​​of S may correspond to different starting positions of the data sharing channel. For example, S=3 indicates that the starting position of the data sharing channel is 3, and the DMRS pattern is as follows. Figure 2a As shown, the second or first communication node maps the CSI parameters in the order of symbols k+1, k+2, k+3, k+4 according to the priority of the CSI parameters, mapping one symbol at a time before moving on to the next. Here, k is the minimum value between the index of the symbol containing DMRS and 3. When S=4, it indicates that the starting position of the data sharing channel is 4, and k is the minimum value between the index of the symbol containing DMRS and 4.

[0243] Example 10: The first signaling is used to indicate the orthogonal coverage code (OCC) of the DMRS pilot.

[0244] Here, the first signaling is used to indicate different OCCs, and different values ​​of S may correspond to different numbers of symbols. For example, S=2 indicates that the OCC is 2, and the DMRS pattern is as follows. Figure 2d As shown, the second or first communication node maps the CSI parameters according to the priority of the CSI parameters in the order of symbols k1+1, k2-1, k2+1, k1+2, k2-2, k2+2, and so on. After mapping one symbol, it maps the next symbol. Here, k1 is the index of the symbol where the first group of DMRS is located, and k2 is the index of the symbol where the second group of DMRS is located.

[0245] For example, when S=4, it means that OCC is 4, and the DMRS diagram is as follows. Figure 2g As shown, the second or first communication node maps the CSI parameters in the order of symbols k1+1, k2-1, k2+1, k3-1, k3+1, k4-1, k4+1 according to the priority of the CSI parameters. After mapping one symbol, the next symbol is mapped. Here, k1, k2, k3, and k4 are the symbol indices of the DMRS.

[0246] It should be noted that the parameters corresponding to multiple first signaling signals in Examples 1 to 10 above can be combined to determine the CSI parameter mapping. For example, the combination of OCC and Layer number can determine the resource mapping of CSI parameters; similarly, the system bandwidth, the number of symbols in DMRS, and the Layer number can all be used to determine the resource mapping of CSI parameters. Other methods for determining the resource mapping of CSI parameters by combining multiple first signaling signals have similar processing, which will not be described again here.

[0247] It should be noted that the CSI parameter mapping method described above is also applicable to resource mapping situations where ACK / NACK and other second uplink control channel parameters are transmitted simultaneously, or when CSI parameters and second uplink control channel parameters are transmitted simultaneously.

[0248] Example 4

[0249] This embodiment provides a method for feeding back the CSI parameter at the time-frequency resource location in the channel state information feedback method when the CSI parameter to be fed back includes RSRP, and the RSRP includes a first-level RSRP and a second-level RSRP. The method includes the following steps:

[0250] Step 41: Feed back the first-level RSRP via physical layer signaling;

[0251] Step 42: Transmit the second-level RSRP via MAC CE.

[0252] The following explains how to transmit and receive RSRP using a hierarchical method.

[0253] Since RSRP represents the power of the received reference signal, the first communication node uses different RF beams to transmit the reference pilot, and / or the second communication node uses different RF beams to receive the reference pilot, resulting in different reference signal powers. That is, there will be one RSRP between a RF transmit beam and a receive RF beam (here called a beam pair link, BPL). However, in high-frequency systems, path loss and penetration loss are relatively large. A single blockage may render the link corresponding to the selected transmit or receive beam direction unusable, thus requiring feedback of multiple RSRPs corresponding to the BPL, such as 10 RSRPs. Each RSRP requires multiple bits, such as 8 bits for quantization, so 80 bits are needed to quantize these RSRPs. If more RSRPs are fed back, the resources required for direct transmission of these RSRPs will be even greater. Therefore, a hierarchical approach to transmitting or obtaining RSRPs can be considered.

[0254] In hierarchical feedback or transmission, the first and second communication nodes agree on a first-level RSRP and a second-level RSRP, and the second communication node transmits the first-level RSRP at the first moment and the second-level RSRP at the second moment. This achieves the goal of saving transmission overhead.

[0255] The first communication node receives the first-level RSRP at a first moment and the second-level RSRP at a second moment. Therefore, the RSRP for each link is calculated and obtained based on the first-level and second-level RSRPs.

[0256] Here, the first-level RSRP, due to its smaller number of quantization bits, can be transmitted using physical layer signaling. The second-level RSRP, with its larger number of quantization bits, can be transmitted using higher-level signaling, such as Media Access Control (MAC) layer signaling, also known as MAC CE (MAC Control Element). Of course, it's also possible that both the first-level and second-level RSRPs can be transmitted at the physical layer or both at the MAC layer.

[0257] Here, the second-level RSRP is determined by the first-level RSRP. That is, the second-level RSRP is determined based on the first-level RSRP, which can be achieved in the following way during implementation:

[0258] The first approach: The second-level RSRP is based on a further precise quantization of the first-level RSRP. That is, the second-level RSRP is determined based on the first-level RSRP and its bias, or based on the difference between the first-level RSRP and its bias.

[0259] For example, RSRP1 to RSRP10 can be divided into two groups of 5 RSRPs each, i.e., the first group is {RSRP1 to RSRP5}, and the second group is {RSRP6 to RSRP10}. This grouping can correspond to the grouping of BPL, or it can be grouped together based on the RSRPs corresponding to the pilot signals transmitted by several adjacent beams. The number of groups and the number of RSRPs included in each group can also be other values.

[0260] The first level RSRP includes two values, the first value being RSRP. 1，1 The first value is the average of the RSRP values, and the second value is the RSRP value. 1，2 This is the average value of the second set of RSRPs. Of course, this average value could also be the maximum value, the first element, the largest element, the smallest element, or the last element of a set of RSRPs. The second communication node feeds back the aforementioned RSRPs at the first moment. 1，1 and RSRP 1，2Accordingly, the first communication node receives the RSRP. 1，1 and RSRP 1，2 .

[0261] At the second moment, the second communication node feeds back the second-level RSRP corresponding to the first group of RSRPs. 2，1 ~RSRP2 ，5 The second group of RSRPs corresponds to the second-level RSRP{RSRP}. 2，6 ~RSRP 2，10}

[0262] RSRP i，j In the diagram, i = 1, 2 represents the i-th level RSRP, while j takes values ​​of 1, 2 when i = 1, and values ​​1 to 10 when i = 2, representing the j-th RSRP corresponding to the i-th level.

[0263] RSRP 2，j Indicates the first level RSRP 1，k Bias, or difference, etc. For example, RSRP 2，1 If the bias value is 1, then RSRP1 = RSRP 1，1 +RSRP 2，1*d d is a difference or bias value. Of course, the second-level RSRP can also be a further quantization of the first-level RSRP, for example, in RSRP... 1，1 The surrounding RSRPs are combined in a certain step size to form a second group of RSRPs.

[0264] The first communication node receives the second-level RSRP and obtains the actual RSRP of the corresponding BPL based on the first-level RSRP, compared to RSRP1 = RSRP. 1，1 +RSRP 2，1*d .

[0265] The second approach: When the first-level RSRP is the RSRP corresponding to the beam group index 1, the RSRPs other than the first-level RSRP are determined as the second-level RSRPs.

[0266] Example 5

[0267] This invention provides a method for jointly encoding CSI parameters. Before feeding back the CSI parameters at the time-frequency resource location, a second communication node can jointly encode two or more CSI parameters or a group of CSI parameters, wherein the CSI parameter group includes at least two CSI parameters. The jointly encoded CSI parameters can be transmitted as a single variable. For example, if RI and i2 are jointly encoded, with RI occupying 3 bits and i2 occupying 4 bits, they form a 7-bit variable. This variable can be further encoded into a 22-bit variable for transmission.

[0268] The CSI parameter groups that the second communication node can jointly encode include, but are not limited to, any of the following parameter groups or combinations:

[0269] Multiple first-level RSRPs can be jointly encoded; for example, if there are two RSRP11 and RSRP12, they can be jointly encoded to form a new variable for transmission.

[0270] One or more Level 1 RSRP and CRI1 joint codes;

[0271] Joint encoding of CRI1 and CRI2;

[0272] Joint coding of CRI2 and channel rank RI;

[0273] CRI1, beam group index, port index, and joint encoding between any two or more parameters of the beam index;

[0274] The joint coding of any two or more parameters between the channel rank RI and the amplitude information of the linearly combined codebook, the phase information of the linearly combined codebook, and the beam information of the linearly combined codebook.

[0275] When the first communication node receives the jointly encoded CSI parameter group, it can perform demodulation and other processing to obtain the CSI parameters corresponding to the jointly encoded CSI parameter group.

[0276] Example 6

[0277] This invention provides a method for receiving channel state information. Figure 4 This is a schematic diagram illustrating the implementation process of a channel state information receiving method provided in an embodiment of the present invention, as shown below. Figure 4 As shown, the method includes the following steps:

[0278] Step S401: The first communication node determines the priority of the CSI parameters in the CSI parameter set.

[0279] Here, before determining the priority of CSI parameters in the CSI parameter set in step S401, the method further includes: obtaining the CSI parameters contained in the CSI parameter set according to the higher-layer signaling configured by itself; or, determining the CSI parameters transmitted by the second communication node according to the time-frequency resource location of the second communication node transmitting the CSI parameters.

[0280] Step S402: The first communication node determines the CSI parameters transmitted by the second communication node and the time-frequency resource location of the second communication node transmitting the CSI parameters according to the priority of the CSI parameters.

[0281] Step S403: The first communication node receives the CSI parameters transmitted by the second communication node at the time-frequency resource location.

[0282] The CSI parameters include at least one of the following: Type I CSI parameters and Type II CSI parameters, wherein:

[0283] The first type of CSI parameters includes at least one of the following parameters: Reference Signal Received Power (RSRP), Category 1 Channel State Information Reference Signal Resource Indicator (CRI1), Beam Group Index, Beam Index, Port Group Index, Level 1 RSRP, and Level 2 RSRP.

[0284] The second type of CSI parameters includes at least one of the following parameters: channel rank indicator RI, second type channel state information reference signal resource indicator CRI2, precoding matrix index, wideband channel quality indicator WB CQI, subband channel quality indicator SBCQI, first precoding matrix index, second precoding matrix index, beam information of linearly combined codebook, phase information of linearly combined codebook, and amplitude information of linearly combined codebook.

[0285] In other embodiments of the present invention, step S401, in which the first communication node determines the priority of the CSI parameters in the CSI parameter set, can be implemented in the following ways:

[0286] The first communication node determines the priority of the CSI parameters requested from the second communication node according to preset rules; or,

[0287] The first communication node determines the priority of the CSI parameters based on higher-layer signals or physical layer signaling carrying priority relationships sent by the second communication node; or,

[0288] The first communication node determines the priority of the CSI parameters according to a preset rule agreed upon by the second communication node and the first communication node.

[0289] It should be noted that the principles followed by the first communication node in determining the priority of the CSI parameters on its own or in accordance with the agreement with the second communication node are the same as the priority relationships specified in A.1, A.2, and A.3 provided in other embodiments of the present invention.

[0290] The priority of the CSI parameters includes at least one of the following:

[0291] Priority relationships are divided according to the degree of latency sensitivity of CSI parameters, priority relationships according to the importance of CSI parameters, and priority relationships according to the scheduling order of CSI parameters.

[0292] In other embodiments of the present invention, determining the CSI parameters transmitted by the second communication node according to the priority of the CSI parameters includes:

[0293] The step of determining the CSI parameters transmitted by the second communication node according to the priority of the CSI parameters includes:

[0294] The parameters in the CSI parameter set are divided into C1 CSI parameter subsets.

[0295] The C2 subsets of CSI parameters with the highest priority in the CSI parameter subset are determined as the CSI parameter set transmitted by the second communication node. The priority of the CSI parameter subset is determined by the priority of the CSI parameter with the highest priority in the CSI parameter subset. C1 and C2 are positive integers, and C2 is less than or equal to C1.

[0296] The CSI parameters transmitted by the second communication node are all or part of the CSI parameter set.

[0297] In other embodiments of the present invention, determining the time-frequency resource location of the CSI parameters transmitted by the second communication node according to the priority of the CSI parameters includes:

[0298] The time-frequency resource location of the CSI parameters is determined based on the priority of the CSI parameters transmitted by the first signaling and the second communication node according to its own configuration. The first signaling includes physical layer signaling and / or higher layer signaling, and carries at least one of the following information:

[0299] The demodulation reference pilot pattern (DMRS), layer number, MIMO mode, time unit structure, subcarrier type, system bandwidth, carrier frequency modulation method, number of symbols occupied by DMRS, starting position of data sharing channel, transmission time length of data sharing channel, and orthogonal coverage code (OCC) of DMRS pilot.

[0300] In other embodiments of the present invention, the time-frequency resource position is the time-frequency resource position of the CSI parameter relative to the DMRS. Determining the time-frequency resource position of the CSI parameter transmitted by the second communication node according to the priority of the CSI parameter includes:

[0301] For the same carrier, if N1 < N2, the priority of the CSI parameter on the i-th symbol is not lower than the priority of the CSI parameter on the j-th symbol; if N1 > N2, the priority of the CSI parameter on the i-th symbol is not higher than the priority of the CSI parameter on the j-th symbol; if N1 = N2 and i < j, the priority of the CSI parameter on the i-th symbol is not lower than the priority of the CSI parameter on the j-th symbol; if N1 = N2 and i > j, the priority of the CSI parameter on the i-th symbol is not higher than the priority of the CSI parameter on the j-th symbol;

[0302] Where, N1 is the minimum value of the first index difference set, and the first index difference set is composed of the absolute values of the differences between the i-th symbol and the symbol index where the Nd-th DMRS is located; N2 is the minimum value of the second index difference set, and the second index difference set is composed of the absolute values of the differences between the j-th symbol and the symbol index where the Nd-th DMRS is located. i and j are non-negative integers less than Ns, Nd is a positive integer less than Ns, and Ns is the number of symbols in a subframe. Another method or description method for obtaining N1 and N2 is that N1 = min(|k - i|), N2 = min(|k - j|), where i, k, and j are all non-negative integers less than Ns, k is the symbol index of one or more symbols where the DMRS is located, |c| represents taking the absolute value of c, and min(C) represents taking the minimum value of the set C;

[0303] And / or,

[0304] For different carriers of the same symbol, the priority of the CSI parameter transmitted on the m1-th carrier is not lower than the priority of the CSI parameter transmitted on the m2-th subcarrier, where m1 < m2, and m1 and m2 are positive integers.

[0305] In other embodiments of the present invention, the time-frequency resource position is the time-frequency resource position of the CSI parameter relative to the DMRS. Determining the time-frequency resource position of the CSI parameter transmitted by the second communication node includes:

[0306] For any symbol k containing a DMRS, if the DMRS of symbol k is discrete in the frequency domain, the CSI parameters are mapped in the order k, k-1, k+1, ..., k-N1, k+N1 according to the priority order of the CSI parameters. Furthermore, if a symbol with an index of k-N1 is used to transmit downlink control channels or guard GP slots, then symbols with indexes less than k-N1 are not used to transmit CSI parameters; if a symbol with an index of k+N1 is used to transmit uplink control channels, then symbols with indexes greater than k+N1 are not used to transmit CSI parameters, where N1 is a positive integer and less than Ns / 2, and Ns is the number of symbols contained in a subframe; or...

[0307] For any symbol k containing DMRS, if the DMRS of symbol k occupies all subcarriers in the frequency domain, the CSI parameters are mapped in the order of k-1, k+1, ..., k-N1, k+N1 according to the priority order of the CSI parameters. Furthermore, if a symbol with a symbol index of k-N1 is used to transmit downlink control channels or guard time slots (GP), then symbols with symbol indices less than k-N1 are not used to transmit CSI parameters. If a symbol with a symbol index of k+N1 is used to transmit uplink control channels, then symbols with symbol indices greater than k+N1 are not used to transmit CSI parameters, and symbols used to transmit DMRS are not used to transmit CSI parameters. Here, N1 is a positive integer and less than Ns / 2, where Ns is the number of symbols contained in a subframe.

[0308] In other embodiments of the present invention, the step of determining the time-frequency resource location of the CSI parameters transmitted by the second communication node according to the priority of the CSI parameters further includes:

[0309] Determine the ordered set of symbols used for transmitting the CSI parameters based on the DMRS pattern;

[0310] The mapping relationship between the CSI parameters and the symbols in the ordered symbol set used to transmit the CSI parameters is determined according to the priority of the CSI parameters, wherein the sequence number of the symbol corresponding to the higher priority CSI parameter in the ordered symbol set is less than the sequence number of the symbol corresponding to the lower priority CSI parameter in the ordered symbol set.

[0311] In other embodiments of the present invention, before determining the time-frequency resource location of each CSI parameter in the set of CSI parameters transmitted by the second communication node and the time-frequency resource location of the second communication node transmitting the CSI parameter according to the priority of the CSI parameters, the method further includes:

[0312] The time-frequency resource location of the second uplink control channel parameters is determined based on the first signaling configured therein, wherein the first signaling includes physical layer signaling and / or higher layer signaling, and the second uplink control channel parameters include, but are not limited to, one of the following parameters: ACK confirmation, NACK rejection, scheduling request (SR), buffer status report (BSR); and / or

[0313] The priority of the second uplink control signaling parameter is no lower than the priority of any one of the first type of CSI parameter and the second type of CSI parameter.

[0314] In other embodiments of the present invention, when the received CSI parameter includes RSRP, and the RSRP includes a first-level RSRP and a second-level RSRP, the step of feeding back the parameter value corresponding to the CSI parameter at the time-frequency resource location includes:

[0315] The parameter values ​​of the first-level RSRP are fed back through physical layer signaling;

[0316] The parameter values ​​of the second-level RSRP are transmitted via MAC CE.

[0317] In other embodiments of the present invention, the second-level RSRP is determined by the first-level RSRP, that is, the second-level RSRP is determined based on the first-level RSRP. The first-level RSRP includes, but is not limited to, the average value, maximum value, first element, maximum element, minimum element, and last element of the RSRP of each RSRPGroup.

[0318] In the implementation process, the determination of the second-level RSRP based on the first-level RSRP can be achieved in the following ways:

[0319] The second-level RSRP is determined based on the first-level RSRP and its bias, or...

[0320] The second-level RSRP is determined based on the difference between the first-level RSRP and the second-level RSRP; or,

[0321] When the first-level RSRP is the RSRP corresponding to the beam with beam group index 1, the RSRPs other than the first-level RSRP are determined as the second-level RSRPs.

[0322] In other embodiments of the present invention, the CSI parameters received at the time-frequency resource location are CSI parameters jointly encoded by the second communication node, wherein the second communication node jointly encodes at least one of the following CSI parameters: jointly encoded at least two first-level RSRPs; jointly encoded one or more first-level RSRPs and CRI1; jointly encoded CRI1 and CRI2; jointly encoded CRI2 and RI; jointly encoded any two or more parameters among CRI1, beamgroup index, port index, and beam index; and jointly encoded any two or more parameters among RI, linear combiner codebook amplitude information, linear combiner codebook phase information, and linear combiner codebook beam information.

[0323] In the channel state information receiving method provided in this invention, a first communication node first determines the priority of CSI parameters in the CSI parameter set. Then, based on the priority of the CSI parameters, it determines the time-frequency resource location of the CSI parameters transmitted by the second communication node and receives the CSI parameters transmitted by the second communication node at the time-frequency resource location. This establishes the priority relationship between the newly introduced CSI parameters and the original Release 13-related CSI parameters, as well as the priority relationship between the newly introduced CSI parameters themselves. Furthermore, based on these priority relationships, the time-frequency resource location of the feedback CSI parameters is determined, improving the accuracy of channel state information transmission and thus enhancing system performance.

[0324] Example 7

[0325] This invention provides a channel state information feedback device. Figure 5 This is a schematic diagram of the composition structure of a channel state information feedback device provided in an embodiment of the present invention, as shown below. Figure 5 As shown, the device includes: a first determining module 501, a second determining module 502, and a feedback module 503, wherein:

[0326] The first determining module 501 is used to determine the priority of CSI parameters in the Channel State Information (CSI) parameter set;

[0327] In this embodiment of the invention, the first determining module 501 further includes:

[0328] The first determining unit is configured to automatically determine the priority of the CSI parameters requested by the first communication node according to preset rules; or,

[0329] The second determining unit is configured to determine the priority of the CSI parameters based on received higher-layer signals and / or physical layer signaling carrying priority relationships; or,

[0330] The third determining unit is used to determine the priority of the CSI parameters according to a preset rule agreed upon by itself and the first communication node.

[0331] The second determining module 502 is used to determine the CSI parameter to be fed back and the time-frequency resource location for feeding back the CSI parameter to be fed back, based on the priority of the CSI parameter.

[0332] The feedback module 503 is used to feed back the CSI parameters to be fed back at the time-frequency resource location.

[0333] In other embodiments of the present invention, the second determining module 502 further includes:

[0334] The first partitioning unit is used to divide the parameters in the CSI parameter set into C1 CSI parameter subsets;

[0335] The fifth determining unit is used to determine the C2 subset of CSI parameters with the highest priority among the C1 subsets of CSI parameters as the set of CSI parameters to be fed back, wherein the priority of the CSI parameter subset is determined by the priority of the CSI parameter with the highest priority in the CSI parameter set; C1 and C2 are positive integers, and C2 is less than or equal to C1, and the CSI parameters to be fed back are all or part of the CSI parameters in the CSI parameter set.

[0336] The sixth determining unit is used to determine the time-frequency resource location of the CSI parameters based on the priority of the first signaling sent by the first communication node and the CSI parameters to be fed back. The first signaling includes physical layer signaling and / or higher layer signaling, and the first signaling carries at least one of the following information: demodulation reference pilot pattern (DMRS), layer number, MIMO mode, time unit structure, subcarrier type, system bandwidth, carrier frequency modulation method, number of symbols occupied by DMRS, starting position of data sharing channel, transmission time length of data sharing channel, and orthogonal coverage code (OCC) of DMRS pilot.

[0337] In other embodiments of the present invention, the time-frequency resource location is the time-frequency resource location of the CSI parameter relative to the DMRS, and determining the time-frequency resource location of the CSI parameter according to the priority of the CSI parameter fed back to the first communication node includes:

[0338] For the same carrier, if N1 < N2, the priority of the CSI parameter on the i-th symbol is not lower than the priority of the CSI parameter on the j-th symbol; if N1 > N2, the priority of the CSI parameter on the i-th symbol is not higher than the priority of the CSI parameter on the j-th symbol; if N1 = N2 and i < j, the priority of the CSI parameter on the i-th symbol is not lower than the priority of the CSI parameter on the j-th symbol; if N1 = N2 and i > j, the priority of the CSI parameter on the i-th symbol is not higher than the priority of the CSI parameter on the j-th symbol;

[0339] Wherein, N1 is the minimum value of the first index difference set, and the first index difference set is composed of the absolute values of the differences between the i-th symbol and the symbol index of the Nd-th DMRS; N2 is the minimum value of the second index difference set, and the second index difference set is composed of the absolute values of the differences between the j-th symbol and the symbol index of the Nd-th DMRS. i and j are non-negative integers less than Ns, Nd is a positive integer less than Ns, and Ns is the number of symbols in a subframe. Another method or description for obtaining N1 and N2 is that N1 = min(|k - i|), N2 = min(|k - j|), where i, k, and j are all non-negative integers less than Ns, k is the symbol index of one or more symbols where the DMRS is located, |c| represents taking the absolute value of c, and min(C) represents taking the minimum value of the set C;

[0340] And / or,

[0341] For different carriers of the same symbol, the priority of the CSI parameter transmitted on the m1-th carrier is not lower than the priority of the CSI parameter transmitted on the m2-th carrier, where m1 < m2, and m1 and m2 are positive integers.

[0342] In other embodiments of the present invention, the second determination unit 502 may further include:

[0343] The seventh determination unit is configured to determine an ordered set of symbols for transmitting the CSI parameter according to the DMRS pattern;

[0344] The eighth determination unit is configured to determine the mapping relationship between the CSI parameter to be fed back and the symbols in the ordered set of symbols for transmitting the CSI parameter according to the priority of the CSI parameter to be fed back, wherein the index value of the element in the ordered set corresponding to the CSI parameter with a higher priority is smaller than the index of the element in the ordered set corresponding to the CSI parameter with a lower priority.

[0345] In other embodiments of the present invention, the device further includes:

[0346] The first acquisition module is configured to acquire the CSI parameters included in the CSI parameter set by receiving the high-layer signaling configured by the first communication node;

[0347] The fifth determining module is used to determine the time-frequency resource location of the second uplink control channel parameters based on the first signaling sent by the first communication node, wherein the first signaling includes physical layer signaling and / or higher layer signaling, and the second uplink control channel parameters include, but are not limited to, one of the following parameters: confirm ACK, deny NACK, schedule request SR, buffer status report BSR; and / or the priority of the second uplink control signaling parameter is not lower than the priority of any one of the first type of CSI parameters and the second type of CSI parameters.

[0348] When the CSI parameters fed back to the first communication node include RSRP, and the RSRP includes a first-level RSRP and a second-level RSRP, the feedback module 503 includes:

[0349] The first feedback unit is used to feed back the parameter values ​​of the first-level RSRP through physical layer signaling;

[0350] The second feedback unit is used to transmit the parameter values ​​of the second-level RSRP via MAC CE.

[0351] The ninth determining unit is used to determine the second level RSRP based on the first level RSRP, wherein the first level RSRP includes, but is not limited to, the average value, maximum value, first element, maximum element, minimum element, and last element of the RSRP of each RSRP Group.

[0352] In other embodiments of the present invention, the ninth determining unit is further configured to determine the second-level RSRP based on the first-level RSRP and the bias of the first-level RSRP, or,

[0353] The second-level RSRP is determined based on the difference between the first-level RSRP and the second-level RSRP; or,

[0354] When the first-level RSRP is the RSRP corresponding to the beam with beam group index 1, the RSRPs other than the first-level RSRP are determined as the second-level RSRPs.

[0355] In other embodiments of the present invention, the apparatus further includes:

[0356] The encoding module is used to jointly encode the CSI parameters, wherein at least one of the following CSI parameters is jointly encoded: at least two first-level RSRPs are jointly encoded; one or more first-level RSRPs and CRI1 are jointly encoded; CRI1 and CRI2 are jointly encoded; CRI2 and RI are jointly encoded; any two or more parameters among CRI1, beamgroup index, port index, and beam index are jointly encoded; any two or more parameters among RI, linear combiner codebook amplitude information, linear combiner codebook phase information, and linear combiner codebook beam information are jointly encoded.

[0357] It should be noted that the description of the channel state information feedback device embodiment above is similar to the description of the channel state information feedback method embodiment above, and has similar beneficial effects as the method embodiment; therefore, it will not be repeated. For technical details not disclosed in the channel state information feedback device embodiment of the present invention, please refer to the description of the channel state information feedback method embodiment of the present invention for understanding.

[0358] Example 8

[0359] This invention provides a second communication node. Figure 6 This is a schematic diagram of the composition structure of the second communication node in an embodiment of the present invention, as shown below. Figure 6 As shown, the second communication node 600 includes at least: a processor 601 and a storage medium 602 configured to store executable instructions, wherein:

[0360] The processor 601 is configured to execute stored executable instructions, the executable instructions including:

[0361] Determine the priority of CSI parameters in the CSI parameter set;

[0362] The CSI parameters to be fed back and the time-frequency resource locations for feeding back the CSI parameters to be fed back are determined based on the priority of the CSI parameters.

[0363] The CSI parameters to be fed back are fed back at the time-frequency resource location.

[0364] In other embodiments of the present invention, before executing the instruction to determine the priority of CSI parameters in the CSI parameter set, the processor is further configured to: obtain the CSI parameters contained in the CSI parameter set by receiving higher-layer signaling configured by the first communication node.

[0365] In other embodiments of the present invention, determining the priority of CSI parameters in the CSI parameter set includes:

[0366] The priority of the CSI parameters is automatically determined according to preset rules; or,

[0367] The priority of the CSI parameters is determined based on received higher-layer signals and / or physical layer signaling carrying priority relationships; or,

[0368] The priority of the CSI parameters is determined according to a preset rule agreed upon by the second communication node and the first communication node. It should be noted that the content of the CSI parameters in this embodiment of the invention, and the determination of the priority relationship of the CSI parameters, are the same as the priority relationships specified in A.1, A.2, and A.3 provided in other embodiments of the invention.

[0369] In other embodiments of the present invention, determining the CSI parameters to be fed back based on the priority of the CSI parameters includes:

[0370] Divide the parameters in the CSI parameter set into C1 CSI parameter subsets;

[0371] The C2 subset of CSI parameters with the highest priority among the C1 subsets of CSI parameters is determined as the set of CSI parameters to be fed back. The priority of the CSI parameter subset is determined by the priority of the CSI parameter with the highest priority among the CSI parameter subsets. C1 and C2 are positive integers, and C2 is less than or equal to C1. The CSI parameters to be fed back are all or part of the CSI parameters in the CSI parameter set.

[0372] In other embodiments of the present invention, determining the time-frequency resource location of the CSI parameter to be fed back based on the priority of the CSI parameter includes:

[0373] The time-frequency resource location of the CSI parameter is determined based on the priority of the first signaling sent by the first communication node and the CSI parameter to be fed back, wherein the first signaling includes physical layer signaling and / or higher layer signaling, and the first signaling carries at least one of the following information:

[0374] The demodulation reference pilot pattern (DMRS), layer number, MIMO mode, time unit structure, subcarrier type, system bandwidth, carrier frequency modulation method, number of symbols occupied by DMRS, starting position of data sharing channel, transmission time length of data sharing channel, and orthogonal coverage code (OCC) of DMRS pilot.

[0375] In other embodiments of the present invention, the time-frequency resource location is the time-frequency resource location of the CSI parameter relative to the DMRS, and determining the time-frequency resource location of the CSI parameter according to the priority of the CSI parameter fed back to the first communication node includes:

[0376] For the same carrier, if N1 < N2, the priority of the CSI parameter on the i-th symbol is not lower than the priority of the CSI parameter on the j-th symbol; if N1 > N2, the priority of the CSI parameter on the i-th symbol is not higher than the priority of the CSI parameter on the j-th symbol; if N1 = N2 and i < j, the priority of the CSI parameter on the i-th symbol is not lower than the priority of the CSI parameter on the j-th symbol; if N1 = N2 and i > j, the priority of the CSI parameter on the i-th symbol is not higher than the priority of the CSI parameter on the j-th symbol;

[0377] Wherein, N1 is the minimum value of the first index difference set, and the first index difference set is composed of the absolute values of the differences between the i-th symbol and the symbol index of the Nd-th DMRS; N2 is the minimum value of the second index difference set, and the second index difference set is composed of the absolute values of the differences between the j-th symbol and the symbol index of the Nd-th DMRS, i and j are non-negative integers less than Ns, Nd is a positive integer less than Ns, and Ns is the number of symbols in a subframe. Another method or description method for obtaining N1 and N2 is that N1 = min(|k - i|), N2 = min(|k - j|), i, k, and j are all non-negative integers less than Ns, k is the symbol index of one or more symbols where the DMRS is located, |c| represents taking the absolute value of c, and min(C) represents taking the minimum value of the set C;

[0378] and / or,

[0379] For different carriers of the same symbol, the priority of the CSI parameter transmitted on the m1-th carrier is not lower than the priority of the CSI parameter transmitted on the m2-th carrier, where m1 < m2, and m1 and m2 are positive integers.

[0380] In other embodiments of the present invention, determining the time-frequency resource position of the CSI parameter according to the priority of the CSI parameter fed back to the first communication node further includes:

[0381] Determining an ordered set of symbols for transmitting the CSI parameter according to the DMRS pattern;

[0382] Determining the mapping relationship between the CSI parameter to be fed back and the symbols in the ordered set of symbols for transmitting the CSI parameter according to the priority of the CSI parameter to be fed back, wherein the index value of the element in the ordered set corresponding to the CSI parameter with a higher priority is less than the index value of the element in the ordered set corresponding to the CSI parameter with a lower priority.

[0383] In other embodiments of the present invention, before executing the instruction to determine the CSI parameter to be fed back and the time-frequency resource position for feeding back the CSI parameter to be fed back according to the priority of the CSI parameter, the processor is further configured to execute the following instructions:

[0384] The time-frequency resource location of the second uplink control channel parameters is determined based on the first signaling received from the first communication node, wherein the first signaling includes physical layer signaling and / or higher layer signaling, and the second uplink control channel parameters include, but are not limited to, one of the following parameters: ACK confirmation, NACK rejection, scheduling request (SR), buffer status report (BSR); and / or

[0385] The priority of the second uplink control signaling parameter is no lower than the priority of any one of the first type of CSI parameter and the second type of CSI parameter.

[0386] In other embodiments of the present invention, when the CSI parameter to be fed back includes RSRP, and the RSRP includes a first-level RSRP and a second-level RSRP, the step of feeding back the CSI parameter to be fed back at the time-frequency resource location includes:

[0387] The first-level RSRP is fed back via physical layer signaling;

[0388] The second-level RSRP is transmitted via MAC CE.

[0389] In other embodiments of the present invention, the second-level RSRP is determined by the first-level RSRP, that is, the second-level RSRP is determined based on the first-level RSRP. The first-level RSRP includes, but is not limited to, the average value, maximum value, first element, maximum element, minimum element, and last element of the RSRP of each RSRPGroup.

[0390] In other embodiments of the present invention, determining the second-level RSRP based on the first-level RSRP includes:

[0391] The second-level RSRP is determined based on the first-level RSRP and its offset, or based on the difference between the first-level RSRP and its offset; or, when the first-level RSRP is the RSRP corresponding to the beam with beam group index 1, the RSRP other than the first-level RSRP is determined as the second-level RSRP.

[0392] In other embodiments of the present invention, before executing the instruction to feed back the CSI parameter at the time-frequency resource location, the processor is further configured to execute the following instructions:

[0393] The CSI parameters are jointly encoded, wherein at least one of the following CSI parameters is jointly encoded: at least two first-level RSRPs are jointly encoded; one or more first-level RSRPs and CRI1 are jointly encoded; CRI1 and CRI2 are jointly encoded; CRI2 and RI are jointly encoded; any two or more parameters among CRI1, beamgroup index, port index, and beam index are jointly encoded; any two or more parameters among RI, linear combiner codebook amplitude information, linear combiner codebook phase information, and linear combiner codebook beam information are jointly encoded.

[0394] Correspondingly, this embodiment of the invention further provides a storage medium, wherein the computer storage medium stores computer-executable instructions configured to execute the aforementioned channel state information feedback method.

[0395] Example 9

[0396] This invention provides a channel state information receiving device, the receiving device comprising: a third determining module, a fourth determining module, and a receiving module, wherein:

[0397] The third determining module is used to determine the priority of CSI parameters in the CSI parameter set;

[0398] The fourth determining module is used to determine the CSI parameters transmitted by the second communication node and the time-frequency resource location of the second communication node transmitting the CSI parameters according to the priority of the CSI parameters.

[0399] The receiving module is used to receive CSI parameters transmitted by the second communication node at the time-frequency resource location.

[0400] In other embodiments of the present invention, the third determining module further includes:

[0401] The tenth determining unit is used to automatically determine the priority of the CSI parameters requested from the second communication node according to preset rules; or,

[0402] The eleventh determining unit is configured to determine the priority of the CSI parameters based on higher-layer signals or physical-layer signaling carrying priority relationships sent by the received second communication node; or,

[0403] The twelfth determining unit is used to determine the priority of the CSI parameters according to a preset rule agreed upon in advance by the second communication node and the first communication node.

[0404] It should be noted that the content of the CSI parameters in the embodiments of the present invention, as well as the determination of the priority relationship of the CSI parameters, are the same as the priority relationships specified in A.1, A.2 and A.3 provided in other embodiments of the present invention.

[0405] In other embodiments of the present invention, the fourth determining module further includes:

[0406] The thirteenth determining unit is used to determine a first set of CSI parameters, including the CSI parameters requested from the second communication node, based on a preset CSI parameter set.

[0407] The second partitioning unit is used to divide the parameters in the CSI parameter set into C1 CSI parameter subsets;

[0408] The fourteenth determining unit is used to determine the C2 highest priority CSI parameter subsets in the CSI parameter subset as the CSI parameter set transmitted by the second communication node, wherein the priority of the CSI parameter subset is determined by the priority of the highest priority CSI parameter in the CSI parameter set; wherein C1 and C2 are positive integers, and C2 is less than or equal to C1, and the CSI parameters transmitted by the second communication node are all or part of the CSI parameters in the CSI parameter set;

[0409] The fifteenth determining unit is used to determine the time-frequency resource location of the CSI parameters according to the priority of the first signaling and the CSI parameters transmitted by the second communication node configured by itself. The first signaling includes physical layer signaling and / or higher layer signaling. The first signaling carries at least one of the following information: demodulation reference pilot pattern (DMRS), layer number, MIMO mode, time unit structure, subcarrier type, system bandwidth, carrier frequency modulation method, number of symbols occupied by DMRS, starting position of data sharing channel, transmission time length of data sharing channel, and orthogonal coverage code (OCC) of DMRS pilot.

[0410] In other embodiments of the present invention, the time-frequency resource location is the time-frequency resource location of the CSI parameter relative to the DMRS, and the step of determining the time-frequency resource location of the CSI parameter transmitted by the second communication node according to the priority of the CSI parameter includes:

[0411] For the same carrier, if N1 < N2, the priority of the CSI parameter on the i-th symbol is not lower than the priority of the CSI parameter on the j-th symbol; if N1 > N2, the priority of the CSI parameter on the i-th symbol is not higher than the priority of the CSI parameter on the j-th symbol; if N1 = N2 and i < j, the priority of the CSI parameter on the i-th symbol is not lower than the priority of the CSI parameter on the j-th symbol; if N1 = N2 and i > j, the priority of the CSI parameter on the i-th symbol is not higher than the priority of the CSI parameter on the j-th symbol;

[0412] Wherein, N1 is the minimum value of the first index difference set, and the first index difference set is composed of the absolute values of the differences between the i-th symbol and the symbol index of the Nd-th DMRS; N2 is the minimum value of the second index difference set, and the second index difference set is composed of the absolute values of the differences between the j-th symbol and the symbol index of the Nd-th DMRS. i and j are non-negative integers less than Ns, Nd is a positive integer less than Ns, and Ns is the number of symbols in a subframe. Another method or description for obtaining N1 and N2 is that N1 = min(|k - i|), N2 = min(|k - j|), where i, k, and j are all non-negative integers less than Ns, k is the symbol index of one or more symbols where the DMRS is located, |c| represents taking the absolute value of c, and min(C) represents taking the minimum value of the set C;

[0413] and / or,

[0414] For different carriers of the same symbol, the priority of the CSI parameter transmitted on the m1-th carrier is not lower than the priority of the CSI parameter transmitted on the m2-th carrier, where m1 < m2, and m1 and m2 are positive integers.

[0415] In other embodiments of the present invention, the fourth determination module further includes:

[0416] The sixteenth determination unit is configured to determine an ordered set of symbols for transmitting the CSI parameter according to the DMRS pattern;

[0417] The seventeenth determination unit determines the mapping relationship between the CSI parameter transmitted by the second communication node and the symbols in the ordered set of symbols for transmitting the CSI parameter according to the priority of the CSI parameter transmitted by the second communication node. Among them, the index value of the element in the ordered set corresponding to the CSI parameter with a higher priority is smaller than the index value of the element in the ordered set corresponding to the CSI parameter with a lower priority.

[0418] In other embodiments of the present invention, the receiving device further includes:

[0419] The second acquisition module is configured to acquire the CSI parameters included in the CSI parameter set according to the high-layer signaling configured by itself.

[0420] The seventh determining module is used to determine the CSI parameters transmitted by the second communication node based on the time-frequency resource location of the CSI parameters transmitted by the second communication node.

[0421] The sixth determining module is used to determine the time-frequency resource location of the second uplink control channel parameters according to the first signaling configured by itself, wherein the first signaling includes physical layer signaling and / or higher layer signaling, and the second uplink control channel parameters include, but are not limited to, one of the following parameters: confirm ACK, deny NACK, schedule request SR, buffer status report BSR; and / or the priority of the second uplink control signaling parameter is not lower than the priority of any one of the first type of CSI parameters and the second type of CSI parameters.

[0422] In other embodiments of the present invention, when the received CSI parameters include RSRP, and the RSRP includes a first-level RSRP and a second-level RSRP, the receiving module includes:

[0423] The first receiving unit is configured to receive the first-level RSRP by receiving physical layer signaling from the second communication node;

[0424] The second receiving unit is used to receive the second-level RSRP by receiving MAC layer signaling from the second communication node.

[0425] The eighteenth determining unit is used to determine the second level RSRP based on the first level RSRP, wherein the first level RSRP includes, but is not limited to, the average value, maximum value, first element, maximum element, minimum element, and last element of the RSRP of each RSRP Group.

[0426] In other embodiments of the present invention, the eighteenth determining unit is further configured to:

[0427] The second-level RSRP is determined based on the first-level RSRP and its offset, or based on the difference between the first-level RSRP and its offset; or, when the first-level RSRP is the RSRP corresponding to the beam with beam group index 1, the RSRP other than the first-level RSRP is determined as the second-level RSRP.

[0428] The CSI parameters received by the receiving module are CSI parameters jointly encoded by the second communication node. The second communication node jointly encodes at least one of the following CSI parameters: at least two first-level RSRPs are jointly encoded; one or more first-level RSRPs and CRI1 are jointly encoded; CRI1 and CRI2 are jointly encoded; CRI2 and RI are jointly encoded; any two or more parameters from CRI1, beam group index, port index, and beam index are jointly encoded; any two or more parameters from RI, linear combiner codebook amplitude information, linear combiner codebook phase information, and linear combiner codebook beam information are jointly encoded.

[0429] It should be noted that the description of the above embodiments of the channel state information receiving device is similar to the description of the above embodiments of the channel state information receiving method, and has similar beneficial effects as the method embodiments; therefore, it will not be repeated. For technical details not disclosed in the embodiments of the channel state information receiving device of the present invention, please refer to the description of the embodiments of the channel state information receiving method of the present invention for understanding.

[0430] Example 10

[0431] This invention provides a first communication node, which includes at least a processor and a storage medium configured to store executable instructions, wherein:

[0432] The processor is configured to execute stored executable instructions, the executable instructions including:

[0433] Determine the priority of CSI parameters in the CSI parameter set;

[0434] The CSI parameters transmitted by the second communication node and the time-frequency resource location of the second communication node for transmitting the CSI parameters are determined according to the priority of the CSI parameters.

[0435] The CSI parameters transmitted by the second communication node are received at the time-frequency resource location.

[0436] In other embodiments of the present invention, before executing the instruction to determine the priority of CSI parameters in the CSI parameter set, the processor also executes the following instructions: obtains the CSI parameters contained in the CSI parameter set according to its own configured higher-layer signaling; or,

[0437] The CSI parameters transmitted by the second communication node are determined based on the time-frequency resource location of the CSI parameters transmitted by the second communication node.

[0438] In other embodiments of the present invention, determining the priority of CSI parameters in the CSI parameter set includes:

[0439] The system automatically determines the priority of the CSI parameters requested from the second communication node according to preset rules; or...

[0440] The priority of the CSI parameters is determined based on higher-layer signals or physical layer signaling carrying priority relationships sent by the received second communication node; or,

[0441] The priority of the CSI parameters is determined according to a preset rule agreed upon in advance by the second communication node and the first communication node.

[0442] In other embodiments of the present invention, determining the CSI parameters transmitted by the second communication node according to the priority of the CSI parameters includes:

[0443] Divide the parameters in the CSI parameter set into C1 CSI parameter subsets;

[0444] The C2 subsets of CSI parameters with the highest priority in the CSI parameter subset are determined as the CSI parameter set transmitted by the second communication node. The priority of the CSI parameter subset is determined by the priority of the CSI parameter with the highest priority in the CSI parameter subset. C1 and C2 are positive integers, and C2 is less than or equal to C1. The CSI parameters transmitted by the second communication node are all or part of the CSI parameters in the CSI parameter set.

[0445] In other embodiments of the present invention, determining the time-frequency resource location of the CSI parameters transmitted by the second communication node according to the priority of the CSI parameters includes:

[0446] The time-frequency resource location of the CSI parameters is determined based on the priority of the CSI parameters transmitted by the first signaling and the second communication node according to its own configuration. The first signaling includes physical layer signaling and / or higher layer signaling, and carries at least one of the following information:

[0447] The demodulation reference pilot pattern (DMRS), layer number, MIMO mode, time unit structure, subcarrier type, system bandwidth, carrier frequency modulation method, number of symbols occupied by DMRS, starting position of data sharing channel, transmission time length of data sharing channel, and orthogonal coverage code (OCC) of DMRS pilot.

[0448] In other embodiments of the present invention, the time-frequency resource location is the time-frequency resource location of the CSI parameter relative to the DMRS, and the step of determining the time-frequency resource location of the CSI parameter transmitted by the second communication node according to the priority of the CSI parameter includes:

[0449] For the same carrier, if N1 < N2, the priority of the CSI parameter on the i-th symbol is not lower than the priority of the CSI parameter on the j-th symbol; if N1 > N2, the priority of the CSI parameter on the i-th symbol is not higher than the priority of the CSI parameter on the j-th symbol; if N1 = N2 and i < j, the priority of the CSI parameter on the i-th symbol is not lower than the priority of the CSI parameter on the j-th symbol; if N1 = N2 and i > j, the priority of the CSI parameter on the i-th symbol is not higher than the priority of the CSI parameter on the j-th symbol;

[0450] Wherein, N1 is the minimum value of the first index difference set, and the first index difference set is composed of the absolute values of the differences between the i-th symbol and the symbol index of the Nd-th DMRS; N2 is the minimum value of the second index difference set, and the second index difference set is composed of the absolute values of the differences between the j-th symbol and the symbol index of the Nd-th DMRS. i and j are non-negative integers less than Ns, Nd is a positive integer less than Ns, and Ns is the number of symbols in a subframe. Another method or description method for obtaining N1 and N2 is that N1 = min(|k - i|), N2 = min(|k - j|), where i, k, and j are all non-negative integers less than Ns, k is the symbol index of one or more symbols where the DMRS is located, |c| represents taking the absolute value of c, and min(C) represents taking the minimum value of the C set;

[0451] and / or,

[0452] For different carriers of the same symbol, the priority of the CSI parameter transmitted on the m1-th carrier is not lower than the priority of the CSI parameter transmitted on the m2-th carrier, where m1 < m2, and m1 and m2 are positive integers.

[0453] In other embodiments of the present invention, determining the time-frequency resource position of the CSI parameter transmitted by the second communication node according to the priority of the CSI parameter further includes:

[0454] Determining an ordered set of symbols for transmitting the CSI parameter according to the DMRS pattern;

[0455] Determining the mapping relationship between the CSI parameter and the symbols in the ordered set of symbols for transmitting the CSI parameter according to the priority of the CSI parameter, wherein the serial number of the symbol corresponding to the CSI parameter with a higher priority in the ordered set of symbols is smaller than the serial number of the symbol corresponding to the CSI parameter with a lower priority in the ordered set of symbols.

[0456] In other embodiments of the present invention, before executing the instruction to determine the CSI parameter transmitted by the second communication node and the time-frequency resource position of the CSI parameter transmitted by the second communication node according to the priority of the CSI parameter, the processor is further configured to execute the following instructions:

[0457] The time-frequency resource location of the second uplink control channel parameters is determined based on the first signaling configured therein, wherein the first signaling includes physical layer signaling and / or higher layer signaling, and the second uplink control channel parameters include, but are not limited to, one of the following parameters: ACK confirmation, NACK rejection, scheduling request (SR), buffer status report (BSR); and / or

[0458] The priority of the second uplink control signaling parameter is no lower than the priority of any one of the first type of CSI parameter and the second type of CSI parameter.

[0459] In other embodiments of the present invention, when the received CSI parameter includes RSRP, and the RSRP includes a first-level RSRP and a second-level RSRP, receiving the parameter value corresponding to the CSI parameter at the time-frequency resource location includes:

[0460] The first-level RSRP is received by receiving physical layer signaling from the second communication node;

[0461] The second-level RSRP is received by receiving MAC layer signaling from the second communication node.

[0462] In other embodiments of the present invention, the processor is further configured to execute the following instructions:

[0463] The second level RSRP is determined based on the first level RSRP, wherein the first level RSRP includes, but is not limited to, the average value, maximum value, first element, maximum element, minimum element, and last element of the RSRP for each RSRP Group.

[0464] In other embodiments of the present invention, determining the second-level RSRP based on the first-level RSRP includes:

[0465] The second-level RSRP is determined based on the first-level RSRP and its bias, or...

[0466] The second-level RSRP is determined based on the difference between the first-level RSRP and the second-level RSRP; or,

[0467] When the first-level RSRP is the RSRP corresponding to the beam with beam group index 1, the RSRPs other than the first-level RSRP are determined as the second-level RSRPs.

[0468] In other embodiments of the present invention, the CSI parameters received at the time-frequency resource location are CSI parameters jointly encoded by the second communication node, wherein the second communication node jointly encodes at least one of the following CSI parameters: jointly encoded at least two first-level RSRPs; jointly encoded one or more first-level RSRPs and CRI1; jointly encoded CRI1 and CRI2; jointly encoded CRI2 and RI; jointly encoded any two or more parameters among CRI1, beamgroup index, port index, and beam index; and jointly encoded any two or more parameters among RI, linear combiner codebook amplitude information, linear combiner codebook phase information, and linear combiner codebook beam information.

[0469] Correspondingly, this embodiment of the invention further provides a computer storage medium storing computer-executable instructions configured to execute the aforementioned method for receiving channel state information.

[0470] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of hardware embodiments, software embodiments, or embodiments combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0471] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0472] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0473] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0474] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A method for wireless communication, comprising: The user equipment determines a first reference signal received power (RSRP) value, wherein the first RSRP value is the maximum measured value in the RSRP group; The user equipment determines the second RSRP value based on the difference between the first RSRP value and the second RSRP value. as well as The user equipment reports the first RSRP value and the second RSRP value to the base station in a physical layer message. Before reporting the first RSRP value to the base station, the user equipment jointly encodes the first RSRP value with the Channel State Information Reference Signal Resource Indicator (CRI).

2. The method according to claim 1, further comprising: The channel state information is reported to the base station, wherein the channel state information includes at least one of the following: channel quality indicator (CQI), precoding matrix indicator (PMI), and rank indicator (RI).

3. A method for wireless communication, comprising: The base station receives a first reference signal received power (RSRP) value and a second RSRP value from the user equipment in a physical layer message, wherein the first RSRP value is the maximum measured value in the RSRP group and is jointly encoded with the channel state information reference signal resource indication (CRI), and wherein the second RSRP value is a differential based on the first RSRP value. as well as The base station determines the reference signal received power based on the first RSRP value and the second RSRP value.

4. The method according to claim 3, further comprising: The user equipment receives channel state information, wherein the channel state information includes at least one of the following: channel quality indicator (CQI), precoding matrix indicator (PMI), and rank indicator (RI).

5. An apparatus for wireless communication, comprising a processor configured to: Determine a first reference signal received power (RSRP) value, wherein the first RSRP value is the maximum measured value in the RSRP group; A second RSRP value is determined based on the difference between the first RSRP value and the second RSRP value; and The first RSRP value and the second RSRP value are reported to the base station in the physical layer message. in, Before reporting the first RSRP value to the base station, the processor jointly encodes the first RSRP value with the Channel State Information Reference Signal Resource Indicator (CRI).

6. The apparatus of claim 5, wherein the processor is configured to report channel state information to the base station, the channel state information including at least one of the following: channel quality indicator (CQI), precoding matrix indicator (PMI), and rank indicator (RI).

7. An apparatus for wireless communication, comprising a processor configured to: In a physical layer message, a first Reference Signal Received Power (RSRP) value and a second RSRP value are received from the user equipment, wherein the first RSRP value is the maximum measurement in the RSRP group and is jointly encoded with Channel State Information Reference Signal Resource Indication (CRI), and wherein the second RSRP value is a differential based on the first RSRP value; and The reference signal received power is determined based on the first RSRP value and the second RSRP value.

8. The apparatus of claim 7, wherein the processor is configured to receive channel state information from the user equipment, wherein the channel state information includes at least one of the following: channel quality indicator (CQI), precoding matrix indicator (PMI), and rank indicator (RI).

9. A storage medium storing computer-readable instructions, which, when executed by a processor, cause the processor to perform the method according to any one of claims 1-4.

Images