Sub-broadband determination method and device, storage medium and program product

Abstract

The embodiment of the invention provides a sub-broadband determination method and device, a storage medium and a program product, relates to the technical field of communication, and is used for providing the sub-broadband determination method. The method comprises the following steps: determining the number M of sub-broadband or the size m of the sub-broadband, and determining M sub-broadband according to the number M of the sub-broadband or the size m of the sub-broadband; the number M of the sub-broadband or the size m of the sub-broadband is determined based on at least one of the following items: a default mode, a mode indicated by a network side and the CSI of a plurality of sub-bands, and m or M is a positive integer.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular, to a method, apparatus, storage medium, and program product for determining a sub-wideband. Background Art

[0002] With the continuous growth of wireless communication demands, improving spectral efficiency has become a key objective in the design of wireless communication systems. For this purpose, multi-antenna technology, as an important means to improve spectral efficiency, has been widely applied and developed. This technology can significantly increase the data transmission rate and system reliability by using multiple antennas at the transmitting end and the receiving end to transmit data or signals.

[0003] However, to achieve the best performance of multi-antenna technology, it is crucial to obtain accurate channel state information (CSI). However, as the bandwidth increases, such as reaching 400 MHz, 800 MHz, or even 1 GHz, etc., it becomes increasingly complex to obtain accurate and comprehensive CSI. The characteristics of ultra-wideband signals lead to different characteristics of some traditional wideband channel state information in different frequency bands. For example, the layer 1-reference signal receiving power (L1-RSRP), the layer 1-signal to interference plus noise ratio (L1-SINR), the CSI-RS resource indicator (CRI), and the rank indicator (RI) may show significant differences in different frequency domain regions of the entire bandwidth.

[0004] How to divide the bandwidth to obtain a sub-wideband to obtain the channel state information on the sub-wideband is a problem that needs to be solved. Summary of the Invention

[0005] Embodiments of the present disclosure provide a method, apparatus, storage medium, and program product for determining a sub-wideband, which are used to provide a method for dividing a sub-wideband.

[0006] To achieve the above object, the present disclosure adopts the following technical solutions.

[0007] In a first aspect, a method for determining a sub-wideband is provided, including:

[0008] Determine the number of sub-bands M or the size of the sub-band m, and determine M sub-bands according to the number of sub-bands M or the size of the sub-band m; the number of sub-bands M or the size of the sub-band m is determined based on at least one of the following: the default method, the method indicated by the network side, and multiple sub-band CSIs, where M is a positive integer.

[0009] In a second aspect, a method for determining sub-bands is provided, including:

[0010] Determine the number of sub-bands M or the size of the sub-band m, and determine M sub-bands according to the number of sub-bands M or the size of the sub-band m; the number of sub-bands M or the size of the sub-band m is determined based on at least one of the following: the default method, the method determined by the network side, and multiple sub-band CSIs, where m or M is a positive integer.

[0011] In a third aspect, a communication device is provided, including:

[0012] A processing unit, configured to determine the number of sub-bands M or the size of the sub-band m, and determine M sub-bands according to the number of sub-bands M or the size of the sub-band m; the number of sub-bands M or the size of the sub-band m is determined based on at least one of the following: the default method, the method indicated by the network side, and multiple sub-band CSIs, where m or M is a positive integer.

[0013] In a fourth aspect, a communication device is provided, including:

[0014] A processing unit, configured to determine the number of sub-bands M or the size of the sub-band m, and determine M sub-bands according to the number of sub-bands M or the size of the sub-band m; the number of sub-bands M or the size of the sub-band m is determined based on at least one of the following: the default method, the method determined by the network side, and multiple sub-band CSIs, where m or M is a positive integer.

[0015] In a fifth aspect, a communication device is provided, including: a processor and a memory; the memory is coupled to the processor; the memory is used to store instructions executable by the processor, and the memory stores instructions executable by the processor; when the processor is configured to execute the instructions, the communication device executes the method provided in any one of the first aspect or the second aspect above.

[0016] In a sixth aspect, a computer-readable storage medium is provided, and the computer-readable storage medium stores computer instructions. When the computer instructions run on a computer, the computer executes the method provided in any one of the first aspect or the second aspect above.

[0017] In a seventh aspect, a computer program product containing computer instructions is provided. When the computer instructions run on a computer, the computer executes the method provided in any one of the first aspect or the second aspect above.

[0018] In the embodiments of the present disclosure, the number M of sub-bands or the size m of a sub-band is first determined, and then M sub-bands are determined according to the number M of sub-bands or the size m of a sub-band. The number M of sub-bands or the size m of a sub-band is determined based on at least one of the following: a default manner, a manner indicated by the network side, and multiple sub-band CSIs. That is, the embodiments of the present disclosure provide a method for dividing sub-bands, so that the channel state information on the sub-bands can be accurately obtained, and the accuracy of obtaining the channel state information on the sub-bands is improved to enhance the performance of the communication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the technical solutions of the present disclosure, and constitute a part of the specification. They are used together with the embodiments of the present disclosure to explain the technical solutions of the present disclosure, and do not constitute a limitation to the technical solutions of the present disclosure.

[0020] Figure 1 It is a schematic diagram of the network architecture of a communication system provided by an embodiment of the present disclosure;

[0021] Figure 2 It is a schematic flowchart of a method for determining a sub-band provided by an embodiment of the present disclosure;

[0022] Figure 3 It is a schematic flowchart of another method for determining a sub-band provided by an embodiment of the present disclosure;

[0023] Figure 4 It is a schematic flowchart of another method for determining a sub-band provided by an embodiment of the present disclosure;

[0024] Figure 5 It is a schematic diagram of the composition of a communication device provided by an embodiment of the present disclosure;

[0025] Figure 6 It is a schematic diagram of the composition of another communication device provided by an embodiment of the present disclosure;

[0026] Figure 7 It is a schematic diagram of the structure of a communication device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.

[0028] Unless the context otherwise requires, throughout the specification and claims, the term "comprise" and its other forms such as the third-person singular form "comprises" and the present participle form "comprising" are interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example", or "some examples", etc. are intended to indicate that the specific features, structures, materials, or characteristics related to the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms do not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials, or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0029] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present disclosure, unless otherwise stated, the meaning of "a plurality" is two or more.

[0030] In the embodiments of the present disclosure, words such as "exemplary" or "for example" are used to mean as an example, illustration, or explanation. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present disclosure should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0031] In addition, the use of "based on" means open and inclusive because a process, step, calculation, or other action "based on" one or more of the stated conditions or values may in practice be based on additional conditions or values beyond those stated.

[0032] In the description of the present disclosure, unless otherwise stated, " / " means "or". For example, A / B may mean A or B. The "and / or" herein is merely a description of the associative relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B may mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, "at least one" means one or more, and "a plurality" means two or more.

[0033] In the embodiments of the present disclosure, suffixes such as "module", "component", or "unit" used to represent elements are only for the convenience of explaining the present application, and they have no specific meaning per se. Therefore, "module", "component", or "unit" can be used interchangeably.

[0034] Hereinafter, the technical means involved in the embodiments of the present disclosure will be described.

[0035] In some embodiments, the high-layer signaling includes but is not limited to at least one of the following: radio resource control (RRC), media access control element (MAC CE), and signaling other than other physical layer signaling. The physical layer signaling includes but is not limited to: downlink physical layer signaling transmitted on the physical downlink control channel (PDCCH), uplink physical layer signaling transmitted on the physical uplink control channel (PUCCH), and physical layer signaling transmitted on the physical uplink shared channel (PUSCH).

[0036] In some embodiments, the physical channels are divided into physical downlink channels and physical uplink channels. The physical downlink channels include, but are not limited to, Physical downlink control channel (PDCCH) and Physical downlink shared channel (PDSCH). The physical uplink channels include, but are not limited to, Physical uplink control channel (PUCCH) and Physical uplink shared channel (PUSCH). In some embodiments, the PDCCH is mainly used to transmit Downlink Control Information (DCI). The PUCCH is mainly used to transmit Uplink Control Information (UCI), such as Channel State Information (CSI), Hybrid automatic repeat request (HARQ), Scheduling Request, etc. The PDSCH is mainly used to transmit downlink data and downlink signaling, etc. The PUSCH is mainly used to transmit uplink data and uplink signaling, etc.

[0037] In some embodiments, the indication (indicator) of various parameters, which can also be referred to as an index or an identifier (ID), are equivalent concepts, and they can be replaced with each other in some embodiments.

[0038] In some embodiments, the resource identifier of a wireless system can be used to identify the resources of the wireless system, and the resource identifier of the wireless system can also be referred to as a resource indication or a resource index. Among them, the resources of the wireless system include, but are not limited to, any one of the following: reference signal resources, reference signal resource groups, reference signal resource configurations, channel state information (CSI) reports, CSI report sets, terminals, base stations, panels, neural networks, sub-neural networks, neural network layers, precoding matrices, beams, transmission modes, sending modes, receiving modes, modules, models, functional modules, functions, etc. The base station can configure one or a group of resource identifiers for the terminal through high-layer signaling or physical-layer signaling. The terminal can also send one or a group of resource identifiers to the base station through high-layer signaling and / or physical-layer signaling.

[0039] In some embodiments, the resource index i can take values starting from 1 up to the maximum value D. However, in other embodiments, the resource index i can take values starting from 0 up to the maximum value D - 1. D is the maximum number of said resources. The resources can be one or a group of the above-mentioned wireless resources.

[0040] In some embodiments, transmission includes sending or receiving. For example, transmitting data can be understood as sending data or receiving data, and transmitting a signal can be understood as sending a signal or receiving a signal. In some embodiments, physical layer signaling and / or higher layer signaling are also a type of data.

[0041] In some embodiments, in order to obtain channel state information or perform channel estimation, mobility management, positioning, etc., a communication node needs to transmit a reference signal (RS). Among them, the reference signal includes, but is not limited to, channel-state information reference signal (CSI-RS), channel-state information-interference measurement signal (CSI-IM), sounding reference signal (SRS), synchronization signals block (SSB), physical broadcast channel (PBCH), synchronization signals block / physical broadcast channel (SSB / PBCH). In some embodiments, SSB includes a synchronization signals block and / or a physical broadcast channel. In some embodiments, the channel-state information reference signal includes zero power CSI-RS (ZP CSI-RS) and non-zero power CSI-RS (NZP CSI-RS). Additionally, the time-frequency resources used to transmit the reference signal are called reference signal resources. The reference signal resources include a set of one or more resource elements (Resource Element, RE). For example, CSI-RS resource, SRS resource, CSI-IM resource, SSB resource, etc. The reference signal is transmitted on the reference signal resources.

[0042] In some embodiments, in order to save signaling overhead, etc., multiple reference signal resources may be divided into multiple reference signal resource sets. A reference signal resource set may also be referred to as a reference signal resource group, such as CSI-RS resourceset, CSI-IM resource set, SRS resource set, SSB resource set, etc. A reference signal resource set includes at least one reference signal resource, and multiple reference signal resource sets may come from the same reference signal resource setting. The reference signal resource setting can be used to configure parameter information, such as configuring a reference signal resource set, etc. Specifically, the reference signal resource setting includes but is not limited to CSI-RS resource setting, CSI-IM resource setting, SRS resource setting, SSB resource setting, where CSI-RS resource setting may be merged with CSI-IM resource setting and both are referred to as CSI-RS resource setting. A reference signal resource setting may include at least one reference signal resource set. In addition, the reference signal resource setting may also be referred to as a reference signal configuration (RS config), such as CSI-RS resource config, CSI-IM resource config, SRS resource config, SSB resource config.

[0043] In some embodiments, a time instance represents a period of time. For example, a time instance can be a time slot, a mini-slot, or a symbol group. A time slot or a mini-slot may include at least one symbol. In one embodiment, a symbol refers to a time unit in a subframe, a frame, or a time slot, and the unit can be milliseconds, microseconds, nanoseconds, seconds, etc. In one embodiment, a symbol can be an orthogonal frequency division multiplexing (OFDM) symbol, a single-carrier frequency division multiple access (SC-FDMA) symbol, an orthogonal frequency division multiple access (OFDMA) symbol, or a symbol corresponding to various waveforms in future communication systems, etc. In some embodiments, the time slot can be replaced with a time instance, a mini-slot, etc.

[0044] In some embodiments, the transmission unit carrying one modulation symbol is a resource element (RE). An RE is the smallest time-frequency resource for transmitting one modulation symbol and includes the radio resources on one subcarrier and one symbol. The time-frequency resource composed of one or more subcarriers on one or more symbols forms a physical resource block (PRB).

[0045] In some embodiments, some threshold values are required, or referred to as preset threshold values. These threshold values can be at least one of the following: real numbers, positive integers, integers, Boolean values, characters, strings. The threshold values can be agreed upon by the base station and the terminal, or default values, or empirical values obtained through simulation or practice, or values indicated to each other by communication nodes through high-layer signaling and / or physical-layer signaling. For ease of distinction, a first threshold, a second threshold, etc. can be included. They are only used to distinguish different threshold values, rather than for sorting. In some other embodiments, the threshold can be replaced by a threshold group, and each threshold group includes one or more threshold values.

[0046] In some embodiments, the channel information is information obtained based on reference signals (such as CSI-RS) for describing the channel environment between communication nodes. In one embodiment, the channel information is a complex matrix, which can be referred to as a channel matrix. The size of the channel matrix is related to the number of transmit antennas Nt, the number of receive antennas Nr, and the number of resource elements.

[0047] In some embodiments, the beam includes a transmit beam, a receive beam, a receive beam and a transmit beam pair, a transmit beam and a receive beam pair. In some embodiments, the beam is a type of resource, such as a reference signal resource, a transmit-end spatial filter, a receive-end spatial filter, a spatial filter, a spatial reception parameter, transmit-end precoding, receive-end precoding, an antenna port, an antenna weight vector, an antenna weight matrix, etc. The beam index can be replaced by a resource index, such as the reference signal resource index corresponding to the beam, because the beam can be bound to the resources in at least one of the time domain, frequency domain, and code domain. The beam can also be a type of transmission mode; the transmission mode can include spatial division multiplexing, frequency-domain diversity, time-domain diversity, beamforming, etc. In some embodiments, a beam pair includes a combination of a transmit beam and a receive beam.

[0048] In some embodiments, the information processing methods include at least a linear information processing method and a non-linear information processing method. Among them, the non-linear information processing method includes, but is not limited to, various advanced information processing technologies, such as artificial intelligence (AI), etc. In some embodiments, for the sake of convenience of description, the non-linear information processing method is also referred to as the first type of information processing method, and the linear information processing method is also referred to as the second type of information processing method.

[0049] In some embodiments, the channel-state information (CSI) includes the channel-state information of the downlink and the channel-state information of the uplink, which are simply referred to as the downlink channel-state information and the uplink channel-state information, respectively.

[0050] In some embodiments, the downlink channel-state information includes at least one of the following information: CSI-RS resource indicator (CRI), synchronization signals block resource indicator (SSBRI), L1 reference signal received power (L1-RSRP), differential L1-RSRP, L1 signal-to-interference noise ratio (L1-SINR), differential L1-SINR, reference signal received quality (RSRQ), differential RSRQ, channel quality indicator (CQI), broadband CQI, subband CQI, precoding matrix indicator (PMI), layer indicator (LI), rank indicator (RI), precoding information, channel information, CapabilityIndex, time-domain channel properties (TDCP).

[0051] In some embodiments, L1-RSRP or differential L1-RSRP are collectively referred to as L1-RSRP, simply abbreviated as RSRP. In some embodiments, L1-SINR or differential L1-SINR are collectively referred to as L1-SINR, simply abbreviated as SINR.

[0052] In some embodiments, the uplink channel state information includes, but is not limited to, at least one of the following information: uplink sounding reference signal resource indicator (SRS resource Indicator, SRI), uplink sounding reference signal resource set indicator (SRSresource set Indicator, SRSI), transmitted precoding matrix indicator (Transmitted Precoding MatrixIndicator, TPMI), transmitted rank indicator (Transmitted Rank Indicator, TRI), modulation and coding scheme (Modulation and coding scheme, MCS), L1-RSRP, L1-SINR, L1-RSRQ. Additionally, TPMI and TRI may be jointly coded, using the precoding information and layer number field in DCI (i.e., Precoding information and numberof layers, PINL).

[0053] In some embodiments, the precoding information includes a first type of precoding information and a second type of precoding information. The precoding information may include the precoding itself or the quantization value corresponding to the precoding, precoding matrix indicators (PMI) for various subbands or widebands, etc.

[0054] In some embodiments, the first type of precoding information is precoding information implemented in a non-linear manner, such as precoding information obtained based on technologies such as AI.

[0055] In some embodiments, the second type of precoding information is traditional precoding information generated based on linear technologies, such as precoding information based on a codebook, such as various codebook technologies obtained based on DFT vectors.

[0056] The channel rank can also be replaced by one of the following concepts: layer, codeword, transmission layer, rank, row and column (rank), number of receive antennas, number of transmit antennas, number of reference signal ports, number of transmit ports, number of receive ports, etc. In other embodiments, they will not be elaborated one by one.

[0057] In some embodiments, transmitting CSI means carrying CSI on uplink transmission resources for transmission. In one embodiment, transmitting a CSI report means transmitting the content indicated in the CSI report, such as CSI, etc., where transmission includes sending or receiving. In some embodiments, sending a CSI report can also be replaced with feeding back a CSI report, and sending CSI can also be replaced with feeding back CSI. In one embodiment, transmitting CSI in a CSI report means transmitting the CSI in the transmission resources configured for the CSI report.

[0058] In some embodiments, in order to transmit measurement results, such as channel state information, at the physical layer, a communication node needs to configure a report (such as a CSI report or a CSI report config), where the report defines at least one of the following parameters: time-frequency resources for transmitting measurement results (such as CSI), report quality reportQuantity, time-domain category of the report reportConfigType, channel measurement resources, interference measurement resources, information such as the bandwidth size of the measurement, etc. The report can be transmitted on uplink transmission resources, where the uplink transmission resources include PUSCH and PUCCH, and the time-domain category of the report includes periodic reports (such as periodic CSI report, P-CSI), aperiodic reports (such as aperiodic CSI report, AP-CSI), and semi-persistent reports (such as semi-persistent CSI report, SP-CSI).

[0059] In some embodiments, the antenna is a physical antenna. In some embodiments, the antenna is a logical antenna. In some embodiments, a port and an antenna, an antenna port, a reference signal port, and a pilot port can be interchanged. In some embodiments, the antenna is a transmitting antenna. In some embodiments, the antenna is a receiving antenna. In some embodiments, the antenna includes at least one of a transmitting antenna, a receiving antenna, and an antenna pair of a transmitting antenna and a receiving antenna.

[0060] The embodiments of the present disclosure will be specifically described below with reference to the accompanying drawings.

[0061] The technical solutions provided by the embodiments of the present disclosure can be applied to various communication networks that support pragmatic communication. The communication networks in the embodiments of the present disclosure include, but are not limited to, the third-generation mobile communication technology (3G), the fourth-generation mobile communication technology (4G), the fifth-generation mobile communication technology (5G), and future mobile communication networks, such as 6G, 7G, etc. Figure 1As shown, the network architecture may include a first communication node 110 (e.g., including but not limited to a terminal) and a second communication node 120 (e.g., including but not limited to a base station). The first communication node 110 and the second communication node 120 may be a base station or a terminal respectively. The first communication node 110 and the second communication node 120 may be abbreviated as the first node and the second node respectively. In one embodiment, the first communication node 110 is a base station and the second communication node 120 is a terminal. In one embodiment, the first communication node 110 is a base station and the second communication node 120 is a base station. In one embodiment, the first communication node 110 is a terminal and the second communication node 120 is a terminal. In one embodiment, the first communication node 110 is a terminal and the second communication node 120 is a base station. In some embodiments, the communication node includes the first node and / or the second node. In some embodiments, the communication node may also be abbreviated as a node, and the node may be the first node or the second node.

[0062] In some embodiments, the terminal may be a device with wireless transceiver functions, which can be deployed on land, such as indoors or outdoors; it can also be deployed on water (such as a ship, etc.); it can also be deployed in the air (such as an airplane, a balloon, a satellite, a drone, etc.). The terminal may be a mobile phone, a tablet computer (Pad), a computer with wireless transceiver functions, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, and so on. The embodiments of the present application do not limit the application scenarios. The terminal may sometimes also be referred to as a user, a user equipment (UE), a UE unit, a UE station, a mobile station, a mobile device, a UE agent, or a UE device, etc., and the embodiments of the present application do not limit this.

[0063] In some embodiments, the base station may include macro base stations, micro base stations, home base stations, remote radio heads, reconfigurable intelligent surfaces (RISs), routers, wireless fidelity (WIFI) devices, or various network-side devices such as primary cells and secondary cells in various wireless systems.

[0064] It should be noted that Figure 1 it is only an exemplary framework diagram, Figure 1 the number of devices included in it, the names of each device are not limited, and in addition to Figure 1 the devices shown, the communication system may also include other devices such as relay nodes.

[0065] The application scenarios of the embodiments of the present disclosure are not limited. The system architecture and service scenarios described in the embodiments of the present disclosure are for more clearly explaining the technical solutions of the embodiments of the present disclosure, and do not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure. Those of ordinary skill in the art know that with the evolution of the network architecture and the emergence of new service scenarios, the technical solutions provided by the embodiments of the present disclosure are equally applicable to similar technical problems.

[0066] Next, as Figure 2 shown, the embodiments of the present disclosure provide a method for determining a sub-bandwidth. This method is applied to a first communication node, and the first communication node may be the first communication node 110 shown above Figure 1 shown. This method may include the following steps:

[0067] S101. Determine the number M of sub-bandwidths or the size m of the sub-bandwidth, and determine M sub-bandwidths according to the number M of sub-bandwidths or the size m of the sub-bandwidth.

[0068] In some embodiments, the bandwidth of the wireless communication system is relatively large, such as 100M, 200M, or even 400M, 800M, 1000M, etc. Therefore, it is necessary to further divide it into multiple smaller frequency-domain granularities in the frequency domain, such as sub-bandwidths. The sub-bandwidth has a smaller frequency-domain granularity than the wideband and a larger frequency-domain granularity than the existing sub-bands. In a wideband, there are M sub-bandwidths, and M is a positive integer greater than or equal to 1. In a sub-bandwidth, there is one or more sub-bands, and each sub-band includes multiple PRBs.

[0069] In one implementation, the bandwidth is the system bandwidth. In one implementation, the bandwidth is the scheduling bandwidth. In one implementation, the bandwidth is a bandwidth part (BWP). In one implementation, the bandwidth is the frequency domain unit included in a component carrier (CC). In other embodiments, they will not be elaborated.

[0070] In some embodiments, the frequency domain unit included in a sub-wideband is greater than or equal to that included in a sub-band and less than or equal to that included in the bandwidth, where the frequency domain unit is one of the following: sub-carrier, sub-carrier group, PRB, PRB group, sub-band.

[0071] In one embodiment, the bandwidth includes N1 frequency domain units, the sub-wideband includes N2 frequency domain units, and the sub-band includes N3 frequency domain units. Here, N1, N2, and N3 are positive integers, and N1 ≥ N2, and / or N2 ≥ N1.

[0072] In some embodiments, the size of the sub-wideband is the number of frequency domain units included in the sub-wideband. In some embodiments, the size of the sub-wideband is the corresponding frequency domain size of the sub-wideband, with the unit of megahertz (MHz) or kilohertz (kHz).

[0073] In one embodiment, the entire bandwidth includes 400 PRBs. Every 4 or 8 PRBs form a sub-band, and one or more sub-bands form a sub-wideband. In one embodiment, the sub-wideband is equal to the sub-band, and all concepts related to the sub-wideband can also be directly replaced with the related concepts of the sub-band. In one embodiment, the sub-wideband is greater than the sub-band, and a sub-wideband includes K sub-bands, where K is a natural number greater than or equal to 2. In other embodiments, the sub-wideband can also be interchanged with one of the following concepts: sub-band group, PRB group, mid-bandwidth, partial-wideband, quasi-wideband, sub-wideband, sub-bandwidth.

[0074] In one embodiment, when dividing the bandwidth into M sub-widebands, the number M of sub-widebands or the size m of the sub-wideband can be determined first, and then M sub-widebands or the size m of the sub-wideband can be determined according to the number M of sub-widebands, that is, the number M of sub-widebands or the size m of the sub-wideband is determined, and then the bandwidth is divided according to the number M of sub-widebands or the size m of the sub-wideband to obtain M sub-widebands.

[0075] In one embodiment, the communication node calculates the correlation of the channel state information between sub-bands, determines the division of sub-bands according to the correlation between sub-bands, and determines the number M of sub-bands or the size m of the sub-wideband according to the finally determined number of sub-band divisions.

[0076] In some embodiments, the number M of sub-bands or the size m of sub-bands is determined based on at least one of the following: a default manner, a manner indicated by the network side, and multiple sub-band CSIs.

[0077] As an example, the number M of wide bands or the size m of sub-bands is determined based on a default manner, including:

[0078] Between communication nodes, the value of M or m is determined based on at least one of the following: the bandwidth size, the sub-carrier spacing, and the capabilities of the terminal.

[0079] In one example, a communication node (such as the first communication node) obtains the value of M or the value of m in a default manner according to the bandwidth size of the system bandwidth, and divides the entire system bandwidth into M sub-bands according to the value of M or the value of m. In other embodiments, the system bandwidth can also be interchanged with the scheduling bandwidth.

[0080] Taking the example of obtaining the value of M, in one embodiment, the system bandwidth is N MHz, and the communication node divides multiple bandwidth intervals in a default or agreed manner, and each bandwidth interval corresponds to a value of M. When the system bandwidth N belongs to the i-th bandwidth interval, the value of M corresponding to the bandwidth interval, M i , where the i-th bandwidth interval is greater than or equal to f i,1 , less than or equal to f i,2 , which can be expressed as [f i,1 , f i,2 , f i,1 , f i,2 , are positive real numbers or positive integers, m i is a positive integer, i = 1,..., C. As shown in Table 1 below.

[0081] Table 1

[0082] System bandwidth N Value range of the number M of sub - bandwidths <![CDATA[N <= f 1,1 > <![CDATA[M1]]> <![CDATA[f 2,1 < = N <= f 2,2 > <![CDATA[M2]]> …… …… <![CDATA[f C,1 <= N <= f C,2 > <![CDATA[M M >

[0083] In a specific embodiment, M i can have some specific values, such as M1 = 1, M2 = 2, M3 = 3,..., M i = i, etc. In other embodiments, M i , i = 1,..., C can also have other agreed or default values. For example, in a specific example, if N < 100 MHz, then M = 1; if 100 MHz < N <= 300 MHz, M = 2; if 300 MHz < N <= 500 MHz, M = 3, etc.

[0084] In one embodiment, the number of sub-bands M can also be determined according to the bandwidth size N of the system bandwidth and the sub-carrier spacing. For example, there is a table similar to Table 1 for each sub-carrier spacing. Or in one embodiment, the system bandwidth N in the above is replaced by the system bandwidth N / u, where u is an indication of the sub-carrier spacing. For example, when the sub-carrier spacing is 15 KHz, u = 1, and when the sub-carrier spacing is 15*2 k KHz, u = k + 1, for example, when it is 30 KHz, u = 2, and when it is 60 KHz, u = 3. In other embodiments, the basic sub-carrier spacing can also be a value other than 15 KHz.

[0085] Taking the example of obtaining the value of m, assume that the bandwidth size m corresponding to the i-th bandwidth interval i , that is, replacing the value of M in Table 1 with M i with the bandwidth size m i . In one embodiment, if the system bandwidth is 200 M and the sub-bandwidth size m i is 100 M, then 0 - 100 M is one sub-band, and 100 M to 200 M is one sub-band. Here, m i is a positive real number, and i = 1,..., C. In one embodiment, the sizes m of the sub-bands are all the same, that is, m i is a positive real number, and i = 1,..., C are all the same. In one embodiment, at least one of the sub-bands has a size different from that of another sub-band. In one embodiment, if the system bandwidth cannot be evenly divided by the sub-bandwidth size, then there is a size of one sub-band, such as the bandwidth size of the last sub-band, which is less than the sub-bandwidth size m i .

[0086] In one embodiment, the system bandwidth is N PRBs. Similarly, the N belongs to the i-th PRB interval, that is, N is greater than or equal to p i,1 , and less than or equal to p i,2 , then the value of m corresponding to the PRB interval, m i , is used, where the i-th PRB interval is greater than or equal to p i,1 , and less than or equal to p i,2 , which can be expressed as [p i,1 , p i,2 , p i,1 , p i,2 are positive real numbers or positive integers, and m i is a positive integer, and i = 1,..., C. As shown in Table 2 below:

[0087] Table 2

[0088] System bandwidth N (number of PRBs) Value range of the sub - bandwidth size m <![CDATA[N <= p 1,1 > <![CDATA[m1]]> <![CDATA[p 2,1 <= N <= p 2,2 > <![CDATA[m2]]> …… …… <![CDATA[p M,1 <= N <= p M,2 > <![CDATA[m M >

[0089] In a specific embodiment, mi There can be some specific values, such as m1 = 1, m2 = 2, m3 = 3, …, m i = i, and so on. In other embodiments, m i , i = 1, …, C can also have other conventions or default values. For example, in a specific example, if N < 100 PRBs, then m = 1; if 100 < N <= 300 PRBs, m = 2; if 300 < N <= 500 PRBs, m = 3, and so on.

[0090] In one embodiment, due to different capabilities of the terminal, the number of sub - bandwidths M that the terminal can support is also different. For example, some terminals only support one sub - bandwidth, that is, the entire bandwidth. Some terminals support two sub - bandwidths. It is necessary to determine the number of sub - bandwidths M according to the capabilities reported by the terminal.

[0091] In one embodiment, the communication node needs to comprehensively consider factors such as the capabilities of the terminal, the system bandwidth, and the sub - carrier spacing to determine the number of sub - bandwidths M.

[0092] In other embodiments, assume that the bandwidth size m corresponding to the i - th bandwidth interval i That is, replace the value of M in Table 1 with the bandwidth size m i . In one embodiment, if the sub - bandwidth size m i . For example, if the sub - bandwidth size m i is 100 PRBs, then for a 200 - PRB bandwidth, 0 - 100 PRBs is one sub - bandwidth, and 101PRB to 200PRB is one sub - bandwidth. Here, m i is a positive real number, i = 1, …, C.

[0093] In some embodiments, the communication node determines the number of sub - bandwidths M according to at least one of the system bandwidth size, sub - carrier spacing, and the capabilities of the terminal. The method is the same as that described in the previous embodiments and will not be elaborated here. In one embodiment, the communication node determines a set of values for the number of sub - bandwidths according to at least one of the system bandwidth size, sub - carrier spacing, and the capabilities of the terminal, that is, there are at least two values of M. The base station will indicate one value in the set of values for the number of sub - bandwidths according to a high - layer signaling and / or physical - layer signaling. For example, in one embodiment, the set of sub - bandwidths includes two values {2, 4}, and the base station will indicate one value in the set of values for the number of sub - bandwidths, such as 2 or 4, according to a high - layer signaling and / or physical - layer signaling. The terminal determines the final number of sub - bandwidths by receiving the high - layer signaling and / or physical - layer signaling, and divides the system bandwidth into M sub - bandwidths according to the number of sub - bandwidths M.

[0094] In some embodiments, a communication node determines the bandwidth size of a sub-bandwidth (i.e., the sub-bandwidth size) based on at least one of the system bandwidth size, sub-carrier spacing, the capabilities of a terminal, etc. The sub-bandwidth size includes m frequency domain units. The method is the same as that of the embodiments described above and will not be elaborated here. In one embodiment, the communication node determines a set of values for the sub-bandwidth size based on at least one of the system bandwidth size, sub-carrier spacing, the capabilities of a terminal, etc., that is, there are at least two values for the m. The base station indicates a value in the set of bandwidth sizes of the sub-bandwidth according to a higher layer signaling and / or a physical layer signaling. For example, in one embodiment, the set of bandwidth sizes of the sub-bandwidth includes two values {100, 200}, and the base station indicates a value in the set of bandwidth sizes of the sub-bandwidth, such as 100 or 200, according to a higher layer signaling and / or a physical layer signaling. The terminal determines the final bandwidth size m of the sub-bandwidth by receiving the higher layer signaling and / or the physical layer signaling, and divides the system bandwidth into M sub-bandwidths according to the bandwidth size m of the sub-bandwidth. In other embodiments, the bandwidth size of the sub-bandwidth may also be replaced by the size of the frequency domain unit included in the sub-bandwidth.

[0095] In some embodiments, the base station indicates the number M of sub-bandwidths according to a higher layer signaling and / or a physical layer signaling. The value of M is from a predefined or default set of values. In one embodiment, the set of values is two values {wideband, n1}. When taking wideband, it means not dividing the sub-bandwidth. When the value of M is n1, it means dividing the system bandwidth into n1 sub-bandwidths. In one embodiment, the set of values is three values {wideband, n1, n2}. When taking wideband, it means not dividing the sub-bandwidth. When the value of M is n1, it means dividing the system bandwidth into n1 sub-bandwidths. When the value of M is n2, it means dividing the system bandwidth into n2 sub-bandwidths. It should be noted that the set of values may also have 4 or more possible values, which will not be elaborated here one by one. The terminal determines the final number of sub-bandwidths by receiving the higher layer signaling and / or the physical layer signaling, and divides the system bandwidth into M sub-bandwidths according to the number M of sub-bandwidths.

[0096] Based on this, the number M of sub-bandwidths or the size m of the sub-bandwidth is determined based on the indication method of the network side, including:

[0097] Receiving first configuration information, the first configuration information includes K values of the number M of sub-bandwidths or K values of the size m of the sub-bandwidth, where K is an integer greater than 1; receiving first indication information, the first indication information is used to indicate one value in the first configuration information.

[0098] Receiving the first configuration information and receiving the first indication information may be receiving the first configuration information sent by the second communication node and receiving the first indication information sent by the second communication node. The second communication node may be the second communication node 120 shown above Figure 1 For ease of description, in the embodiments of the present disclosure, the first communication node is taken as a terminal and the second communication node is taken as a base station as an example for illustration. Both the first configuration information and the first indication information are carried on high-layer signaling and / or physical-layer signaling.

[0099] That is to say, the base station first sends the first configuration information to the terminal. The first configuration information includes the value of the number M of K sub-bands or the value of the size m of K sub-bands. Furthermore, the base station sends the first indication information to the terminal. The first indication information is used to indicate one value in the first configuration information. After receiving the first configuration information and the first indication information, the terminal can determine one value in the first configuration information based on the first indication information, that is, determine the value of the number M of sub-bands or the value of the size m of K sub-bands. Furthermore, the bandwidth is divided according to the value of the number M of sub-bands or the value of the size m of K sub-bands to obtain M sub-bands.

[0100] Taking the indication of the value of the size m of K sub-bands as an example, in some embodiments, the base station indicates the bandwidth size m of a sub-band according to a high-layer signaling and / or physical-layer signaling. The value of m belongs to a set of agreed or default values. In one embodiment, the set of values is two values {wideband, n1}. When wideband is taken, it means that no sub-bands are divided. When m takes the value of n1, it means that the system bandwidth is divided into one sub-band every n1 MHz. In one embodiment, the set of values is three values {wideband, n1, n2}. When wideband is taken, it means that no sub-bands are divided. When m takes the value of n1, it means that the system bandwidth is divided into one sub-band every n1 MHz. When M takes the value of n2, when m takes the value of n2, it means that the system bandwidth is divided into one sub-band every n2 MHz. It should be noted that the set of values may also have 4 or more possible values, which will not be elaborated here one by one. The terminal determines the final number of sub-bands by receiving the above-mentioned high-layer signaling and / or physical-layer signaling, and divides the system bandwidth into M sub-bands according to the bandwidth size m of the sub-bands. In other embodiments, the size frequency domain granularity unit of the sub-bands may be mega (M) Hz, or other units. The MHz may also be replaced by the number of physical resource blocks (PRBs), the number of sub-bands, kilo (K) Hz, etc. Then the set indicated by the high-layer signaling and / or physical-layer signaling represents the number of PRBs. Of course, in other embodiments, the number of PRBs may be replaced by the number of subcarriers or the number of sub-bands, which will not be elaborated here one by one.

[0101] Based on this, the number of sub-bands M or the size of sub-bands m is determined based on the indication from the network side, including:

[0102] Receiving second indication information, where the second indication information is used to indicate at least one of the following: the number of sub-bands M, the size of sub-bands m, whether sub-bands need to be divided, and the number of PRBs in each sub-band;

[0103] Determining the value of M or m based on the second indication information.

[0104] In some embodiments, the second indication information is carried in higher layer signaling and / or physical layer signaling.

[0105] In one embodiment, the bandwidth size included in each sub-band (i.e., the size of sub-band) is the same. For example, if the system bandwidth is B PBRs and the size of each sub-band is m PRBs, then the system bandwidth will be divided into M = ceil(B / m) sub-bands, and each sub-band includes m PRBs. Of course, when B cannot be divided evenly by m, there may be one sub-band with a number less than m. Here, the unit of system bandwidth or sub-band size, PRB, can also be replaced with units such as sub-band, PRB group, megahertz, kilohertz, etc.

[0106] In one embodiment, the bandwidth size included in each sub-band can be different. For example, if the system bandwidth is B PBRs and is divided into M = 2 sub-bands, one includes B1 PRBs and the other includes B2 PRBs, where B1 + B2 = B, and B1, B2, and B are positive integers and B1 is not equal to B2. For example, B1 = 100 PRBs and B2 = 150 PRBs. Here, the unit of system bandwidth or sub-band size, PRB, can also be replaced with units such as sub-band, PRB group, megahertz, kilohertz, etc.

[0107] In some embodiments, the first communication node (such as a terminal) determines the number of sub-bands M or the size of sub-bands m according to its own capabilities or the CSI on multiple sub-bands obtained. For example, if the CSI on one or more sub-bands is relatively close, then they are divided into the same sub-band. Here, the CSI can be at least one of RI, RSRP, SINR, CRI, CQI, etc. And the number of sub-bands M to be divided or the bandwidth size included in the sub-band (i.e., the size of sub-band) m is sent to the base station, and the base station receives the number of sub-bands M or the bandwidth size m included in the sub-band sent by the terminal and determines and uses the number of sub-bands M and the bandwidth size m of the sub-band.

[0108] Based on this, the number of sub-bands M or the size of sub-bands m is determined based on multiple sub-band CSI, including: determining the correlation of multiple sub-band CSI and determining M or m according to the correlation of multiple sub-band CSI.

[0109] For example, multiple sub-bands with a correlation greater than a preset threshold are divided into the same sub-wideband, and multiple sub-bands with a correlation less than the preset threshold are divided into different sub-widebands. The number of sub-widebands M or the size m of the sub-wideband is determined according to the division result.

[0110] In some embodiments, when the number of sub-widebands M or the size m of the sub-wideband is determined based on multiple sub-band CSIs, the method further includes:

[0111] Sending second configuration information, where the second configuration information includes at least one of the following:

[0112] The division method of the sub-wideband, the number of sub-widebands M, and the size m of the sub-wideband.

[0113] Wherein, the size m of the sub-wideband is also the bandwidth size included in the sub-wideband, that is, the number of frequency domain units included in the sub-wideband.

[0114] Based on Figure 2 In the shown embodiment, first, the number of sub-widebands M or the size m of the sub-wideband is determined, and then M sub-widebands are determined according to the number of sub-widebands M or the size m of the sub-wideband. The number of sub-widebands M or the size m of the sub-wideband is determined based on at least one of the following: the default method, the method indicated by the network side, and multiple sub-band CSIs. That is, the embodiments provided in the present disclosure provide a division method of sub-widebands to facilitate subsequent accurate acquisition of CSIs on each sub-wideband. It should be understood that some current wideband CSIs are calculated based on the entire bandwidth, which may not be suitable for ultra-large bandwidths. Therefore, the bandwidth is divided into M sub-widebands, and then the CSIs on each sub-wideband can be accurately obtained subsequently, improving the accuracy of obtaining CSIs on the sub-wideband to improve the performance of the communication system.

[0115] In some embodiments, as Figure 3 shown, after step S101, the method may further include the following steps:

[0116] S102. Obtain the CSIs on M sub-widebands.

[0117] In some embodiments, the base station transmits reference signals over the entire scheduling bandwidth, and the terminal receives the reference signals and measures the reference signals to obtain one or more CSIs. In one embodiment, the terminal obtains the number M of sub-bands, and divides the scheduled bandwidth into M sub-bands according to the M. For each sub-band, the terminal measures a set of sub-band CSIs under the sub-band, where the set of sub-band CSIs includes one or more sub-band CSIs, and the set of sub-band CSIs includes one of the following: at least one L1-RSRP, at least one L1-SINR, at least one RI, at least one CRI, at least one LI, a sub-band CQI, at least one sub-band CQI under the sub-band, a sub-band PMI, and at least one sub-band PMI under the sub-band. That is, the terminal measures M sets of sub-band CSIs, and one set of sub-band CSIs corresponds to the CSI on one sub-band, that is, obtains the CSIs on M sub-bands.

[0118] In some embodiments, the CSI of one sub-band may also be referred to as a set of CSIs on the sub-band or a set of sub-band CSIs. They can be replaced with each other.

[0119] In some embodiments, the CSI on each of the M sub-bands includes at least one of the following:

[0120] Sub-band L1-RSRP, sub-band L1-SINR, sub-band RI, sub-band CRI, sub-band LI, sub-band CQI, sub-band sub-band CQI, sub-band PMI, sub-band sub-band PMI.

[0121] In one embodiment, the terminal measures M sets of sub-band CSIs, and each set of sub-band CSIs includes one or more L1-RSRPs. Among them, it includes at least one of the following: one or more differential L1-RSRPs, a reference L1-RSRP, one or more CRIs, and one or more differential CRIs.

[0122] In one embodiment, the terminal measures M sets of sub-band CSIs, and each set of sub-band CSIs includes one or more L1-SINRs. Among them, it includes at least one of the following: one or more differential L1-SINRs, a reference L1-SINR, one or more CRIs, and one or more differential CRIs.

[0123] In one embodiment, the terminal measures M sets of sub-band CSIs, and each set of sub-band CSIs includes one or more CRIs, where it includes one or more differential CRIs and / or a reference CRI.

[0124] In one embodiment, the terminal measures M sets of sub-band CSIs, and each set of sub-band CSIs includes one RI.

[0125] In one embodiment, the terminal measures M sets of sub-bandwidth CSI, and each set of sub-bandwidth CSI includes a CRI. For each sub-bandwidth, a RI is obtained based on a CRI in the sub-bandwidth.

[0126] In one embodiment, the terminal measures M sets of sub-bandwidth CSI, and each set of sub-bandwidth CSI includes one or more layer indications.

[0127] In one embodiment, the terminal measures M sets of sub-bandwidth CSI, and each set of sub-bandwidth CSI includes one or more Capability Indexes.

[0128] In one embodiment, the terminal measures M sets of sub-bandwidth CSI, and each set of sub-bandwidth CSI includes one or more time-domain channel properties (TDCP).

[0129] In one embodiment, the terminal measures M sets of sub-bandwidth CSI, and each set of sub-bandwidth CSI includes a CRI and / or a RI. For each sub-bandwidth, a sub-bandwidth PMI and / or multiple sub-band PMIs under the sub-bandwidth are obtained based on a CRI and / or a RI in the sub-bandwidth.

[0130] In one embodiment, for each sub-bandwidth, a sub-bandwidth PMI and / or multiple sub-band PMIs under the sub-bandwidth are obtained based on a CRI and / or a RI in the sub-bandwidth. And a sub-bandwidth CQI and / or multiple sub-band CQIs under the sub-bandwidth are obtained based on the one sub-bandwidth PMI and / or multiple sub-band PMIs. Wherein, the sub-band CQI is a differential CQI calculated based on the sub-bandwidth CQI.

[0131] In some embodiments, the reference CSI is also referred to as the absolute CSI, or directly referred to as CSI. The CSI here can be replaced by one of L1-RSRP, L1-SINR, CRI, RI, CQI, LI, CapabilityIndex, PMI, TDCP, etc.

[0132] Combined with the above description, in some embodiments, the CSI on each of the M sub-bandwidths includes at least one of the following:

[0133] At least one sub-bandwidth CRI;

[0134] At least one differential CRI on at least one sub-bandwidth;

[0135] One sub-bandwidth RI;

[0136] One sub-bandwidth LI;

[0137] One sub - band L1 - RSRP; at least one sub - band differential L1 - RSRP;

[0138] One sub - band L1 - SINR; at least one sub - band differential L1 - SINR;

[0139] One sub - band CQI; at least one sub - band differential CQI;

[0140] At least one sub - band PMI; at least one sub - band differential PMI.

[0141] Wherein, at least one of the sub - band CQI, sub - band PMI, and sub - band PMI is determined based on RI and / or CRI.

[0142] In some embodiments, the CSI on M sub - bands includes at least one of the following:

[0143] M sub - band RIs;

[0144] M sub - band LIs;

[0145] M sub - band CRIs;

[0146] One sub - band CRI and at least one sub - band differential CRI on each sub - band;

[0147] One sub - band L1 - RSRP; at least one sub - band differential L1 - RSRP on each sub - band;

[0148] One sub - band L1 - SINR; at least one sub - band differential L1 - SINR on each sub - band;

[0149] One sub - band CQI; at least one sub - band differential CQI on each sub - band;

[0150] At least one sub - band PMI; at least one sub - band differential PMI on each sub - band.

[0151] S103. Transmit the CSI on M sub - bands.

[0152] In some embodiments, the terminal obtains M groups of sub - band CSI, where the CSI of the i - th group of sub - bands is the CSI on the i - th sub - band, i = 1, …, M. Encode the CSI of the M groups of sub - bands to obtain an encoded block, and transmit it in the transmission resources indicated by a CSI report.

[0153] In one embodiment, the M groups of sub-band CSI are M groups of L1-RSRP, and each group of L1-RSRP includes at least one L1-RSRP. Each L1-RSRP corresponds to a beam or a reference signal port. In one embodiment, for the i-th group of L1-RSRP, the maximum value in the i-th group of L1-RSRP is selected, which is called the first L1-RSRP, and it is quantized with a bits, while the other L1-RSRP in the i-th group are called the second L1-RSRP, and each second L1-RSRP is a difference value relative to the first L1-RSRP and is jointly quantized with b bits. In other embodiments, the first L1-RSRP is called the absolute value L1-RSRP, or the reference L1-RSRP, or directly written as L1-RSRP, that is, in a non-differential form, while the second L1-RSRP is the differential L1-RSRP. In one embodiment, among the M groups of L1-RSRP, there is one first L1-RSRP, and the other L1-RSRP, regardless of which group they are in, are all second L1-RSRP. In one embodiment, the first L1-RSRP is the maximum value of the first group of L1-RSRP. In one embodiment, the first L1-RSRP is the maximum value of the M-th group of L1-RSRP. In one embodiment, the first L1-RSRP is the maximum value of all M groups of L1-RSRP. Wherein, a and b are positive integers, and a is greater than b, for example, a = 7 and b = 4.

[0154] In one embodiment, if each group of L1-RSRP in the M groups of L1-RSRP has only one L1-RSRP, then all M groups of L1-RSRP have only one first L1-RSRP, which is the maximum value of all M groups of L1-RSRP. The L1-RSRP of other groups are all differential L1-RSRP.

[0155] In one embodiment, the M groups of sub-band CSI are M groups of L1-RSRP, and the number of L1-RSRP included in each group is the same. In one embodiment, the M groups of sub-band CSI are M groups of L1-RSRP, and at least two groups of L1-RSRP include different numbers of L1-RSRP.

[0156] In one embodiment, the M groups of sub-band CSI are M groups of L1-RSRP, and each group of L1-RSRP includes L L1-RSRP. The j-th L1-RSRP of the i-th group of L1-RSRP is denoted as RSRP i,j , where i = 1,..., M and j = 1,..., L. In one embodiment, for each value of i, the maximum value of RSRP i,j , where j = 1,..., L is taken as the first RSRP, and the other L1-RSRP are the second L1-RSRP. In one embodiment, RSRP 1,j, the maximum value of j = 1, …, L is taken as the first RSRP, and the other L1-RSRPs are the second L1-RSRPs. In one embodiment, the RSRP is taken i,j , the maximum value of i = 1, …, M and j = 1, …, L is taken as the first L1-RSRP, and the other L1-RSRPs are the second L1-RSRPs.

[0157] In other embodiments, in the above embodiments regarding L1-RSRP, L1-RSRP can be replaced by one of the following concepts: L1-RSRQ, L1-SINR, CQI, PMI, LI, capability index, TDCP. Other embodiments will not be elaborated one by one.

[0158] In some embodiments, there may be insufficient transmission resources for the CSI report to carry the M groups of sub-bandwidth CSI (i.e., the CSI on M sub-bands). It is necessary to perform a priority sorting on all CSI values of the M groups of sub-bandwidth CSI to determine the priority of each CSI. The CSI with a higher priority has its coded bits in the front, and the CSI with a lower priority has its coded bits behind the coded bits of the CSI with a higher priority. And bit positions will be discarded according to the coding rate until the requirements for reliable transmission of the CSI report are met.

[0159] In one embodiment, all M groups of sub-bandwidth CSI will be sorted, and sorted according to the size of the CSI in this group of CSI. The larger the value of the CSI, the higher the priority. For example, for the case where the CSI is L1-RSRP. The larger the L1-RSRP, the higher the priority.

[0160] In one implementation, the priority of the CSI is determined according to the group index corresponding to the M groups of CSI, that is, the CSI in the i-th group of CSI has a higher priority than the CSI in the j-th group, where i < j, and they are integers from 1 to M. In other embodiments, it is also possible that the CSI with a smaller group index has a lower priority than the CSI with a larger group index, which is determined according to the agreement of the communication node. In other embodiments, the indexes of various resources can start from 0, so they are integers from 0 to M - 1. Other embodiments will not be elaborated one by one.

[0161] In one implementation, the priority of the CSI is determined according to the group index corresponding to the M groups of CSI, that is, the CSI in the i-th group of CSI has a higher priority than the CSI in the lower j-th group, with i being odd and j being even, or j being odd and i being even. That is, the CSI of the odd groups has a higher priority than the CSI of the even groups, or the CSI of the odd groups has a lower priority than the CSI of the even groups.

[0162] In one embodiment, sorting is performed according to the size m of the sub-bandwidth. If the size m of the sub-bandwidth corresponding to the i-th group of CSI is larger, its priority is higher.

[0163] Based on the above description, transmitting the CSI on M sub-bands includes:

[0164] Determining the priorities of the CSI on M sub-bands, determining the CSI on the K sub-bands with high priorities based on the priorities of the CSI on M sub-bands, and transmitting the CSI on the K sub-bands, where K is a positive integer less than or equal to M.

[0165] The priorities of the CSI on M sub-bands are determined based on at least one of the following:

[0166] The value of the CSI on the sub-band;

[0167] The index of the sub-band;

[0168] The size of the frequency-domain unit included in the sub-band.

[0169] In some embodiments, for the CSI on the M - K sub-bands among the CSI on M sub-bands other than the CSI on the K sub-bands with high priorities, the terminal discards the CSI on the M - K sub-bands, that is, does not transmit the CSI on the M - K sub-bands.

[0170] It should be noted that the above example is for sorting the priorities of the CSI on M sub-bands and then discarding the CSI on M - K sub-bands with low priorities. In some embodiments, for each of the M sub-bands, the CSI on each sub-band can be sorted, and then the CSI with low priority on the sub-band is discarded. For example, the priorities of CRI and RI are higher than those of RSRP / SINR, the priorities of RSRP / SINR are higher than those of broadband PMI, and the priorities of broadband PMI are higher than those of sub-band PMI or sub-band CQI. When transmitting the CSI on the sub-band, the CSI with high priority on the sub-band is preferentially transmitted, while the CSI with low priority on the sub-band is discarded.

[0171] In some embodiments, when transmitting the CSI on the K sub-bands, the terminal may also send indication information for indicating the K sub-bands to the base station, so that the base station can determine the sub-bands to which the received CSI belongs based on the indication information, that is, determine which sub-bands the received CSI belongs to based on the indication information.

[0172] In some embodiments, the terminal obtains M sets of sub-band CSI (i.e., obtains CSI on M sub-bands), where the CSI of the i-th set of sub-bands is the CSI of the i-th sub-band, i = 1, …, M. The CSI of the M sets of sub-bands is divided into two parts and encoded separately to obtain two encoded blocks, which are then transmitted in the transmission resources indicated by a CSI report. The transmission resources included in the CSI include two parts, a first transmission resource (PartI) and a second transmission resource (PartII).

[0173] That is to say, the CSI on M sub-bands is transmitted on the transmission resources of a CSI report, and the transmission resources of the CSI report include a first transmission resource and a second transmission resource.

[0174] In some embodiments, the first transmission resource is used to transmit at least one of the following:

[0175] The number M of sub-bands, the number of CSI on each sub-band; and / or,

[0176] The second transmission resource is used to transmit the CSI on M sub-bands.

[0177] In one embodiment, each sub-band has an absolute value report and multiple differential reports. That is to say, the second transmission resource is used to transmit the CSI on M sub-bands, including: for each of the M sub-bands, the second transmission resource is used to transmit at least one of the following:

[0178] The absolute value of the CSI on the sub-band;

[0179] The differential CSI on the sub-band.

[0180] It should be understood that transmitting the absolute value of the CSI on the sub-band and the differential CSI of the CSI on other sub-bands in the M sub-bands relative to the CSI on this sub-band can reduce the data transmission volume, reduce the transmission overhead, and improve the utilization rate of the transmission resources.

[0181] In one embodiment, multiple sub-bands share one absolute value report, and other sub-bands, regardless of which one, are differential reports. That is to say, the second transmission resource is used to transmit the CSI on M sub-bands, including: for the M sub-bands, the second transmission resource is used to transmit at least one of the following:

[0182] One reference CSI

[0183] Multiple differential CSI.

[0184] After receiving the reference CSI and the differential CSI, the base station can determine the CSI on the sub-band based on the reference CSI plus the differential CSI. In this way, the data transmission volume can be reduced, the transmission overhead can be reduced, and the utilization rate of the transmission resources can be improved.

[0185] In some embodiments, the first transmission resource is used to transmit CSI on the first sub-band among M sub-bands, and the second transmission resource is used to transmit CSI on the other M - 1 sub-bands.

[0186] For example, the first set of L1-RSRP is transmitted in the first transmission resource, and the other M - 1 sets of L1-RSRP are transmitted in the second transmission resource. In other embodiments, the first transmission resource is also used to transmit the number M of sub-bands.

[0187] In one embodiment, to facilitate the base station in determining which sub-band the received CSI belongs to, the number of CSI on each sub-band can be fixed. For example, each group of L1-RSRP includes a fixed number L of L1-RSRP, where L is a positive integer. When encoding, first sort according to the group index of the group where the L1-RSRP is located. For example, encode the L L1-RSRP of the i-th sub-band first, and then encode the L1-RSRP of the (i + 1)-th sub-band, where i is a positive integer less than M.

[0188] In some embodiments, the first transmission resource is used to transmit reference CSI on the first sub-band, and the second transmission resource is used to transmit differential CSI of CSI on the other M - 1 sub-bands relative to the reference CSI on the first sub-band.

[0189] In this way, the base station can determine the CSI on the first sub-band based on the reference CSI on the first sub-band, and then determine the CSI on the other M - 1 sub-bands according to the differential CSI of CSI on the other M - 1 sub-bands relative to the reference CSI on the first sub-band and the CSI on the first sub-band. The terminal does not need to transmit the complete CSI, thereby being able to reduce the data transmission volume and improve the utilization rate of the transmission resource.

[0190] In one embodiment, the first transmission resource is used to transmit at least one of the following:

[0191] L1-RSRP of C sub-bands;

[0192] L1-SINR of C sub-bands;

[0193] CQI of C sub-bands;

[0194] CRI of C sub-bands;

[0195] At least C sub-bands of PMI;

[0196] The second transmission resource is used to transmit at least one of the following:

[0197] At least one sub-band differential L1-RSRP;

[0198] At least one sub - broadband differential L1 - SINR;

[0199] At least one sub - broadband differential CQI;

[0200] At least one sub - broadband differential CRI on each sub - broadband;

[0201] At least one sub - broadband differential PMI;

[0202] Where C is a positive integer. In one example, C is 1 or the above - mentioned M.

[0203] In some embodiments, to facilitate the base station in determining which sub - broadband the received CSI belongs to, the method further includes: sending third indication information, where the third indication information is used to indicate at least one of the following:

[0204] The number of CSIs on each sub - broadband;

[0205] Sub - broadband CSI transmission bitmap.

[0206] Where the sub - broadband CSI transmission bitmap is used to indicate which sub - broadband CSIs are transmitted. For example, the bitmap includes M bits, and the i - th bit is used to indicate whether the CSI of the i - th sub - broadband is transmitted. When the i - th bit takes 0, it means the CSI of the i - th sub - band is not transmitted, and when the i - th bit takes 1, it means the CSI of the i - th sub - band is transmitted.

[0207] The above embodiments illustrate a method for determining a sub - broadband provided by the embodiments of the present disclosure from the perspective of the first communication node. In some embodiments, as Figure 4 shown, the embodiments of the present disclosure also provide a method for determining a sub - broadband, which is applied to a second communication node, and the method may include the following steps:

[0208] S201. Determine the number of sub - broadbands M or the sub - broadband size m, and determine M sub - broadbands according to the number of sub - broadbands M or the sub - broadband size m.

[0209] Where the number of sub - broadbands M or the sub - broadband size m is determined based on at least one of the following: default method, network - side determined method, multiple sub - band CSIs, and m or M is a positive integer.

[0210] In some embodiments, the frequency - domain units included in the sub - broadband are greater than or equal to the frequency - domain units included in the sub - band and less than or equal to the frequency - domain units included in the bandwidth, where the frequency - domain unit is one of the following: sub - carrier, sub - carrier group, PRB, PRB group, sub - band.

[0211] For the description of determining the number of sub - broadbands M or the sub - broadband size m based on the default method, reference may be made to the above Figure 2The corresponding descriptions in the embodiments shown are not elaborated herein.

[0212] In some embodiments, when the number of sub-bands M or the size of sub-bands m is determined based on the network side, after the second communication node determines the number of sub-bands M or the size of sub-bands m, the second communication node sends first configuration information to the first communication node. The first configuration information includes the values of the number of sub-bands M for K or the values of the size of sub-bands m for K, where K is an integer greater than 1. Then, the second communication node sends first indication information to the first node. The first indication information is used to indicate one of the values in the first configuration information.

[0213] In some embodiments, when the number of sub-bands M or the size of sub-bands m is determined based on the network side, the second communication node sends second indication information to the first communication node. The second indication information is used to indicate at least one of the following: the number of sub-bands M, the size of sub-bands m, and whether sub-bands need to be divided.

[0214] In some embodiments, the number of sub-bands M or the size of sub-bands m is determined based on the CSI of multiple sub-bands, including: the second communication node receives second configuration information sent by the first communication node. The second configuration information includes at least one of the following: the division method of sub-bands, the number of sub-bands M, and the size of sub-bands m, where the number of sub-bands M or the size of sub-bands m is determined based on the correlation of the CSI of multiple sub-bands. Then, the number of sub-bands M or the size of sub-bands m is determined based on the second configuration information.

[0215] In some embodiments, the method further includes: receiving the CSI on M sub-bands.

[0216] As an example, the second communication node receives the CSI on M sub-bands sent by the first communication node.

[0217] In some embodiments, the CSI on each of the M sub-bands includes at least one of the following:

[0218] Sub-band L1-RSRP, sub-band L1-SINR, sub-band RI, sub-band CRI, sub-band layer indication LI, sub-band CQI, sub-band's sub-band CQI, sub-band PMI, sub-band's sub-band PMI.

[0219] In some embodiments, the CSI on each of the M sub-bands includes at least one of the following:

[0220] The CSI on each sub-band includes at least one of the following:

[0221] At least one sub-band CRI;

[0222] At least one differential CRI on sub-bands;

[0223] A sub - broadband RI;

[0224] A sub - broadband LI;

[0225] A sub - broadband L1 - RSRP; at least one sub - broadband differential L1 - RSRP;

[0226] A sub - broadband L1 - SINR; at least one sub - broadband differential L1 - SINR;

[0227] A sub - broadband CQI; at least one sub - broadband differential CQI;

[0228] At least one sub - broadband PMI; at least one sub - broadband differential PMI.

[0229] In some embodiments, the CSI on M sub - broadbands includes at least one of the following:

[0230] M sub - broadband RIs;

[0231] M sub - broadband LIs;

[0232] M sub - broadband CRIs;

[0233] A sub - broadband CRI and at least one sub - broadband differential CRI on each sub - broadband;

[0234] A sub - broadband L1 - RSRP; at least one sub - broadband differential L1 - RSRP on each sub - broadband;

[0235] A sub - broadband L1 - SINR; at least one sub - broadband differential L1 - SINR on each sub - broadband;

[0236] A sub - broadband CQI; at least one sub - broadband differential CQI on each sub - broadband;

[0237] At least one sub - broadband PMI; at least one sub - broadband differential PMI on each sub - broadband.

[0238] As an example, receiving the CSI on M sub - broadbands includes: receiving the CSI on K sub - broadbands, where the CSI on the K sub - broadbands is the CSI on the K sub - broadbands with higher priority among the CSI on the M sub - broadbands, and K is a positive integer less than or equal to M.

[0239] The priority of the CSI on the sub - broadband is determined based on at least one of the following:

[0240] The value of the CSI on the sub - broadband;

[0241] The index of the sub - broadband;

[0242] The size of the frequency domain unit included in the sub-bandwidth.

[0243] As another example, receiving CSI on M sub-bandwidths includes: receiving CSI on M sub-bandwidths on a transmission resource of a CSI report, where the transmission resource of the CSI report includes a first transmission resource and a second transmission resource.

[0244] In some embodiments, the first transmission resource is used to transmit at least one of the following:

[0245] The number M of sub-bandwidths or the sub-bandwidth size m, the number of CSI on each sub-bandwidth; and / or,

[0246] The second transmission resource is used to transmit CSI on M sub-bandwidths.

[0247] In one embodiment, each sub-bandwidth has one absolute value report and multiple differential reports, that is, the second transmission resource is used to transmit CSI on M sub-bandwidths, including: for each of the M sub-bandwidths, the second transmission resource is used to transmit at least one of the following:

[0248] The absolute value of the CSI on the sub-bandwidth;

[0249] The differential CSI on the sub-bandwidth.

[0250] In some embodiments, the first transmission resource is used to transmit CSI on the first sub-bandwidth among the M sub-bandwidths, and the second transmission resource is used to transmit CSI on the other M - 1 sub-bandwidths.

[0251] In some embodiments, the first transmission resource is used to transmit at least one of the following:

[0252] L1-RSRP of C sub-bandwidths;

[0253] L1-SINR of C sub-bandwidths;

[0254] CQI of C sub-bandwidths;

[0255] CRI of C sub-bandwidths;

[0256] PMI of at least C sub-bandwidths;

[0257] The second transmission resource is used to transmit at least one of the following:

[0258] Differential L1-RSRP of at least one sub-bandwidth;

[0259] Differential L1-SINR of at least one sub-bandwidth;

[0260] Differential CQI of at least one sub-bandwidth;

[0261] At least one sub-band differential CRI on each sub-band;

[0262] At least one sub-band differential PMI;

[0263] Where C is a positive integer. In one example, C is 1 or M.

[0264] In some embodiments, the first transmission resource is used to transmit the reference CSI on the first sub-band, and the second transmission resource is used to transmit the differential CSI of the CSI on the other M - 1 sub-bands relative to the reference CSI on the first sub-band.

[0265] In some embodiments, the second communication node receives third indication information, and the third indication information is used to indicate at least one of the following:

[0266] The number of CSI on each sub-band;

[0267] Sub-band CSI transmission bitmap.

[0268] The second communication node can determine the sub-band to which the received CSI belongs based on the third indication information.

[0269] For Figure 4 the descriptions of each piece of information / signaling in the embodiments shown, reference may be made to the corresponding descriptions in the embodiments shown above Figure 2 and Figure 3 the embodiments shown, and details are not described herein again.

[0270] The above mainly introduces the solution provided by the present disclosure from the perspective of the interaction between each node. It can be understood that each node, such as the first node or the second node, includes the corresponding hardware structure and / or software module for implementing each function. Those skilled in the art should easily realize that, in combination with the algorithm steps of each example described in the embodiments disclosed herein, the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described function for each specific application, but such implementation should not be considered to exceed the scope of the present disclosure.

[0271] Embodiments of the present disclosure may divide functional modules for the first communication node or the second communication node according to the above method embodiments. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one functional module. The above integrated module may be implemented in the form of hardware or in the form of software. It should be noted that the division of modules in the embodiments of the present disclosure is illustrative, merely a logical function division, and there may be other division methods in actual implementation. The following takes the example of dividing each functional module corresponding to each function for illustration.

[0272] Figure 5 It is a schematic diagram of the composition of a communication device provided by an embodiment of the present disclosure. As Figure 5 shown, the communication device 30 includes a processing unit 301. In some embodiments, the communication device 30 further includes a sending unit 302.

[0273] The communication device 30 may be the above-mentioned first communication node or a chip in the first communication node. When the communication device 30 is used to implement the functions of the first communication node in the above embodiments, each unit is specifically used to implement the following functions.

[0274] The processing unit 301 is used to determine the number of sub-bands M or the size m of the sub-band, and determine M sub-bands according to the number of sub-bands M or the size m of the sub-band; the number of sub-bands M or the size m of the sub-band is determined based on at least one of the following: the default method, the method indicated by the network side, and multiple sub-band CSIs, where m or M is a positive integer.

[0275] In some embodiments, the processing unit 301 is specifically used to determine the value of M or m based on at least one of the following: the bandwidth size, the sub-carrier spacing, and the capabilities of the terminal.

[0276] In some embodiments, the processing unit 301 is specifically used to receive first configuration information, where the first configuration information includes the value of the number of sub-bands M of K or the value of the size m of K wide bands, where K is an integer greater than 1;

[0277] Receive first indication information, where the first indication information is used to indicate one value in the first configuration information.

[0278] In some embodiments, the processing unit 301 is specifically used to receive second indication information, where the second indication information is used to indicate at least one of the following:

[0279] the number of sub-bands M, the size m of the sub-band, whether to divide sub-bands, and the number of PRBs of each sub-band;

[0280] Determine the value of M or m based on the second indication information.

[0281] In some embodiments, the processing unit 301 is specifically configured to determine the correlation of multiple sub-band CSIs, and the correlation of the multiple sub-band CSIs determines the value of M or m.

[0282] In some embodiments, the sending unit 302 is configured to send second configuration information, where the second configuration information includes at least one of the following:

[0283] The division method of sub-broadbands, the number M of sub-broadbands, and the bandwidth size included in the sub-broadbands.

[0284] In some embodiments, the processing unit 301 is further configured to obtain CSIs on M sub-broadbands;

[0285] The sending unit 302 is configured to transmit the CSIs on M sub-broadbands.

[0286] In some embodiments, the sending unit 302 is specifically configured to determine the priorities of the CSIs on M sub-broadbands, determine the CSIs on the K sub-broadbands with high priorities based on the priorities of the CSIs on M sub-broadbands, and transmit the CSIs on the K sub-broadbands, where K is a positive integer less than or equal to M.

[0287] In some embodiments, the sending unit 302 is specifically configured to transmit the CSIs on M sub-broadbands on a transmission resource of a CSI report, and the transmission resource of the CSI report includes a first transmission resource and a second transmission resource.

[0288] In some embodiments, the sending unit 302 is further configured to send third indication information, where the third indication information is used to indicate at least one of the following:

[0289] The number of CSIs on each sub-broadband;

[0290] The sub-band CSI transmission bit map.

[0291] Figure 6 This is a schematic diagram of the composition of another communication device provided by an embodiment of the present disclosure. As Figure 6 shown, the communication device 40 includes a processing unit 401. In some embodiments, the communication device 40 further includes a sending unit 402 and a receiving unit 403.

[0292] The communication device 40 may be the above-mentioned second communication node or a chip in the second communication node. When the communication device 40 is used to implement the functions of the second communication node in the above embodiments, each unit is specifically configured to implement the following functions.

[0293] A processing unit 401 is configured to determine the number of sub-bands M or the size of a sub-band m, and determine M sub-bands according to the number of sub-bands M or the size of a sub-band m; the number of sub-bands M or the size of a sub-band m is determined based on at least one of the following: a default method, a method determined by the network side, and multiple sub-band CSIs, where m or M is a positive integer.

[0294] In some embodiments, the processing unit 401 is specifically configured to determine the value of M or m based on at least one of the following: the bandwidth size, the sub-carrier spacing, and the capabilities of the terminal.

[0295] In some embodiments, a sending unit 402 is configured to send first configuration information, where the first configuration information includes the value of the number of sub-bands M for K or the value of the size of a sub-band m for K, where K is an integer greater than 1; send first indication information, where the first indication information is used to indicate one value in the first configuration information.

[0296] In some embodiments, the sending unit 402 is configured to send second indication information, where the second indication information is used to indicate at least one of the following: the number of sub-bands M, the size of a sub-band m, whether sub-bands need to be divided, and the number of PRBs for each sub-band.

[0297] In some embodiments, a receiving unit 403 is configured to receive second configuration information, where the second configuration information includes at least one of the following: the sub-band division method, the number of sub-bands M, the size of a sub-band m, and the bandwidth size included in the sub-band, where the number of sub-bands M or the size of a sub-band m is determined based on the correlation of multiple sub-band CSIs; the processing unit 401 is specifically configured to determine the value of M or m based on the second configuration information.

[0298] In some embodiments, the receiving unit 403 is configured to receive CSIs on M sub-bands.

[0299] It should be noted that Figure 5 or Figure 6 The units in Figure 5 or Figure 6 may also be referred to as modules. For example, the sending unit may be referred to as a sending module. Additionally,

[0300] Figure 5 or Figure 6When each unit in [the above] is implemented in the form of a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiments of the present disclosure, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods of the various embodiments of the present disclosure. The storage media storing the computer software product include: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs.

[0301] When the above communication device 30 or communication device 40 implements the functions of the above integrated modules in the form of hardware, the embodiments of the present disclosure provide a structural schematic diagram of a communication device. As Figure 7 shown, the communication device 50 includes: a processor 502, a communication interface 503, and a bus 504. Optionally, the communication device 50 may further include a memory 501.

[0302] The processor 502 can be used to implement or execute various exemplary logic blocks, modules, and circuits described in connection with the disclosed content of the embodiments of the present disclosure. The processor 502 can be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logic blocks, modules, and circuits described in connection with the disclosed content of the embodiments of the present disclosure. The processor 502 can also be a combination that implements computing functions, such as a combination including one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0303] The communication interface 503 is used to connect to other devices through a communication network. The communication network can be an Ethernet, a wireless access network, a wireless local area network (WLAN), etc.

[0304] The memory 501 can be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or can also be an electrically erasable programmable read-only memory (EEPROM), a magnetic disk storage medium, or other magnetic storage devices, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0305] As a possible implementation, the memory 501 can exist independently of the processor 502. The memory 501 can be connected to the processor 502 through the bus 504 for storing instructions or program codes. When the processor 502 calls and executes the instructions or program codes stored in the memory 501, the method for determining the sub-bandwidth provided in the embodiments of the present disclosure can be implemented.

[0306] In another possible implementation, the memory 501 can also be integrated with the processor 502.

[0307] The bus 504 can be an extended industry standard architecture (EISA) bus, etc. The bus 504 can be divided into an address bus, a data bus, a control bus, etc. For the sake of convenience of representation, Figure 7 only a thick line is used to represent it in the figure, but it does not mean that there is only one bus or one type of bus.

[0308] Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and simplicity of description, only the above division of each functional module is used as an example. In actual applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the first node or the second node is divided into different functional modules to complete all or part of the functions described above.

[0309] Embodiments of the present disclosure also provide a computer-readable storage medium. All or part of the processes in the above method embodiments can be completed by computer instructions instructing relevant hardware. The program can be stored in the above computer-readable storage medium. When the program is executed, it can include the processes of the above method embodiments. The above computer-readable storage medium can also be an external storage device of the above first communication node or second communication node, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the above first communication node or second communication node. Further, the above computer-readable storage medium can also include both the internal storage unit of the above first communication node or second communication node and the external storage device. The above computer-readable storage medium is used to store the above computer program and other programs and data required by the above first communication node or second communication node. The above computer-readable storage medium can also be used to temporarily store data that has been output or will be output.

[0310] Embodiments of the present disclosure also provide a computer program product. The computer product includes a computer program. When the computer program product runs on a computer, it causes the computer to execute any one of the sub-bandwidth determination methods provided in the above embodiments.

[0311] Although the present disclosure has been described in conjunction with various embodiments, however, in the process of implementing the claimed present disclosure, those skilled in the art can understand and achieve other changes of the disclosed embodiments by viewing the drawings, the disclosure content, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "one" does not exclude a plurality. A single processor or other unit can implement several functions recited in the claims. Certain measures are recited in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0312] Although the present disclosure has been described in conjunction with specific features and their embodiments, obviously, various modifications and combinations can be made without departing from the spirit and scope of the present disclosure. Accordingly, the present specification and the drawings are only exemplary descriptions of the present disclosure defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the present disclosure. Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalent technologies, the present disclosure also intends to include these changes and modifications.

[0313] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present disclosure should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A method for determining a sub-bandwidth, characterized in that: The method comprises: Determine the number M of subbands or the size m of subbands, and determine M subbands according to the number M of subbands or the size m of subbands; the number M of subbands or the size m of subbands is determined based on at least one of the following: a default method, a method indicated by the network side, and multiple subband channel state information CSI, wherein m or M is a positive integer.

2. The method according to claim 1, characterized in that The frequency domain units included in the subband width are greater than or equal to the frequency domain units included in the subband, and less than or equal to the frequency domain units included in the bandwidth, wherein the frequency domain unit is one of the following: subcarrier, subcarrier group, physical resource block PRB, PRB group, subband.

3. The method according to claim 1, characterized in that The number M of sub-bandwidths or the size m of sub-bandwidths is determined based on the default method, including: The value of M or m is determined based on at least one of the following: bandwidth size, subcarrier spacing, and terminal capability.

4. The method according to claim 1, characterized in that The number M of sub-bandwidths or the size m of sub-bandwidths is determined based on a network-side indication, including: Receive first configuration information, where the first configuration information includes K values ​​of the number M of the subbands or K values ​​of the sizes m of the subbands, where K is an integer greater than 1; First indication information is received, where the first indication information is used to indicate a value in the first configuration information.

5. The method according to claim 1, characterized in that The number M of sub-bandwidths or the size m of sub-bandwidths is determined based on a network-side indication, including: Receive second indication information, where the second indication information is used to indicate at least one of the following: The number of sub-bandwidths M, the size of the sub-bandwidth m, and whether sub-bandwidth division is required; The value of M or m is determined based on the second indication information.

6. The method according to claim 1, characterized in that The subband number M or the subband size m is determined based on multiple subband CSIs, including: determining the correlation of multiple subband CSIs, and determining the value of M or m according to the correlation of the multiple subband CSIs.

7. The method according to claim 1, characterized in that The number M of subbands or the size m of subbands is determined based on a plurality of subband CSIs, and the method further includes: Sending second configuration information, where the second configuration information includes at least one of the following: The sub-band division method, the number of sub-bands M, and the size of the sub-bands m.

8. The method according to claim 1, characterized in that The method further comprises: Obtaining CSI on the M sub-bandwidths; The CSI on the M sub-bandwidths is transmitted.

9. The method according to claim 8, characterized in that The CSI on each of the M sub-bands includes at least one of the following: Subband L1-reference signal received power RSRP, subband L1-signal to interference plus noise ratio SINR, subband rank indication RI, subband channel state information reference signal resource indication CRI, subband layer indication LI, subband channel quality indication CQI, subband CQI of subband, subband precoding matrix indication PMI, subband PMI of subband.

10. The method according to claim 8, characterized in that The transmitting the CSI on the M sub-bandwidths includes: Determine the priorities of the CSIs on the M subbands, determine CSIs on K subbands with high priorities based on the priorities of the CSIs on the M subbands, and transmit the CSIs on the K subbands, where K is a positive integer less than or equal to M.

11. The method according to claim 10, characterized in that The priorities of the CSIs on the M sub-bandwidths are determined based on at least one of the following: The value of the CSI on the sub-bandwidth; An index of the sub-bandwidth; The subband width includes the size of the frequency domain unit.

12. The method according to claim 8, characterized in that The CSI on each of the M sub-bands includes at least one of the following: At least one sub-bandwidth CRI; Differential CRI over at least one sub-bandwidth; A sub-bandwidth RI; A sub-bandwidth LI; One sub-band L1-RSRP; at least one sub-band differential L1-RSRP; One sub-band L1-SINR; at least one sub-band differential L1-SINR; One sub-bandwidth CQI; at least one sub-bandwidth differential CQI; At least one sub-bandwidth PMI; at least one sub-bandwidth differential PMI.

13. The method according to claim 8, characterized in that The CSI on the M sub-bands includes at least one of the following: M sub-bandwidth RIs; M sub-bandwidths LI; M sub-bandwidth CRIs; A sub-band CRI and at least one sub-band differential CRI for each sub-band; One sub-band L1-RSRP; at least one sub-band differential L1-RSRP on each sub-band; One sub-band L1-SINR; at least one sub-band differential L1-SINR on each sub-band; One sub-band CQI; at least one sub-band differential CQI on each sub-band; At least one sub-band PMI; at least one sub-band differential PMI on each sub-band.

14. The method according to claim 8, characterized in that The transmitting the CSI on the M sub-bandwidths includes: The CSI on the M sub-bandwidths is transmitted on a transmission resource of a CSI report, wherein the transmission resource of the CSI report includes a first transmission resource and a second transmission resource.

15. The method according to claim 14, characterized in that The first transmission resource is used to transmit at least one of the following: The number of sub-bandwidths M or the size of sub-bandwidth m, and the number of CSIs on each of the sub-bandwidths; and / or, The second transmission resource is used to transmit the CSI on the M sub-bandwidths.

16. The method according to claim 14, characterized in that The first transmission resource is used to transmit CSI on a first sub-bandwidth among the M sub-bandwidths, and the second transmission resource is used to transmit CSI on other M-1 sub-bandwidths.

17. The method according to claim 14, characterized in that The first transmission resource is used to transmit at least one of the following: C sub-bandwidth L1-RSRP; C sub-bandwidth L1-SINRs; C sub-bandwidth CQIs; C sub-bandwidth CRIs; At least C sub-bandwidth PMIs; The second transmission resource is used to transmit at least one of the following: At least one sub-band differential L1-RSRP; At least one sub-bandwidth differential L1-SINR; At least one sub-band differential CQI; At least one sub-band differential CRI for each sub-band; at least one sub-band differential PMI; Wherein, C is a positive integer.

18. The method according to claim 14, characterized in that The first transmission resource is used to transmit reference CSI on a first subband, and the second transmission resource is used to transmit differential CSI of CSI on other M-1 subbands relative to the reference CSI on the first subband.

19. The method according to claim 8, characterized in that The method further comprises: Sending third indication information, where the third indication information is used to indicate at least one of the following: The number of CSIs on each of the sub-bandwidths; Sub-bandwidth CSI transmission bitmap.

20. A method for determining a sub-bandwidth, characterized in that: The method comprises: Determine the number M of sub-bandwidths or the size m of sub-bandwidths, and determine M sub-bandwidths according to the number M of sub-bandwidths or the size m of sub-bandwidths; the number M of sub-bandwidths or the size m of sub-bandwidths is determined based on at least one of the following: a default method, a method determined by the network side, and multiple sub-band CSIs, wherein m or M is a positive integer.

21. The method according to claim 20, characterized in that The number M of sub-bandwidths or the size m of sub-bandwidths is determined based on the default method, including: The value of M or m is determined based on at least one of the following: bandwidth size, subcarrier spacing, and terminal capability.

22. The method according to claim 20, characterized in that The number M of sub-bandwidths or the size m of sub-bandwidths is determined based on a method determined by a network side, and the method further includes: Sending first configuration information, where the first configuration information includes K values ​​of the number M of the subbands or K values ​​of the sizes m of the subbands, where K is an integer greater than 1; Send first indication information, where the first indication information is used to indicate a value in the first configuration information.

23. The method according to claim 20, characterized in that The number M of sub-bandwidths or the size m of sub-bandwidths is determined based on a method determined by a network side, and the method further includes: Sending second indication information, where the second indication information is used to indicate at least one of the following: The number of sub-bands M, the size of the sub-bands m, and whether sub-band division is required.

24. The method according to claim 20, characterized in that The number M of subbands or the size m of subbands is determined based on the multiple subband CSIs, including: Receive second configuration information, where the second configuration information includes at least one of the following: The subband division method, the number of subbands M, and the subband size m, wherein the number of subbands M or the subband size m is determined based on the correlation of the multiple subband CSIs; The value of M or m is determined based on the second configuration information.

25. The method according to claim 20, characterized in that The method further comprises: Receive CSI on the M sub-bandwidths.

26. A communication device, characterized in that: include: Memory and processor; Memory and processor coupling; The memory is used to store instructions executable by the processor; When the processor executes the instructions, the method according to any one of claims 1 to 25 is performed.

27. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and when the computer instructions are executed on a computer, the computer is caused to perform the method according to any one of claims 1 to 25.

28. A computer program product, characterized in that The computer program product comprises computer instructions, which, when executed on a computer, cause the computer to perform the method according to any one of claims 1 to 25.

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