Method executed by user equipment, method executed by base station, user equipment and base station

Abstract

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a user equipment (UE) is provided.. The method includes: receiving first information through a first high-layer signaling, the first information being used to configure a first channel state information (CSI)-reference signal (RS) resource; in a case where second information is received through a physical layer signaling or a media access control (MAC) layer signaling, determining a resource for receiving a physical downlink shared channel (PDSCH) according to the first information or the second information, the second information indicating a second CSI-RS resource for determining CSI; and, receiving a PDSCH on the determined resource.

Description

METHOD EXECUTED BY USER EQUIPMENT, METHOD EXECUTED BY BASE STATION, USER EQUIPMENT AND BASE STATION

[0001] The present disclosure relates to the technical field of communication, and in particular to a method executed by a user equipment, a method executed by a base station, a user equipment and a base station.

[0002] 5G mobile communication technologies define broad frequency bands such that high transmission rates and new services are possible, and can be implemented not only in "Sub 6GHz" bands such as 3.5GHz, but also in "Above 6GHz" bands referred to as mmWave including 28GHz and 39GHz. In addition, it has been considered to implement 6G mobile communication technologies (referred to as Beyond 5G systems) in terahertz bands (for example, 95GHz to 3THz bands) in order to accomplish transmission rates fifty times faster than 5G mobile communication technologies and ultra-low latencies one-tenth of 5G mobile communication technologies.

[0003] At the beginning of the development of 5G mobile communication technologies, in order to support services and to satisfy performance requirements in connection with enhanced Mobile BroadBand (eMBB), Ultra Reliable Low Latency Communications (URLLC), and massive Machine-Type Communications (mMTC), there has been ongoing standardization regarding beamforming and massive MIMO for mitigating radio-wave path loss and increasing radio-wave transmission distances in mmWave, supporting numerologies (for example, operating multiple subcarrier spacings) for efficiently utilizing mmWave resources and dynamic operation of slot formats, initial access technologies for supporting multi-beam transmission and broadbands, definition and operation of BWP (BandWidth Part), new channel coding methods such as a LDPC (Low Density Parity Check) code for large amount of data transmission and a polar code for highly reliable transmission of control information, L2 pre-processing, and network slicing for providing a dedicated network specialized to a specific service.

[0004] Currently, there are ongoing discussions regarding improvement and performance enhancement of initial 5G mobile communication technologies in view of services to be supported by 5G mobile communication technologies, and there has been physical layer standardization regarding technologies such as V2X (Vehicle-to-everything) for aiding driving determination by autonomous vehicles based on information regarding positions and states of vehicles transmitted by the vehicles and for enhancing user convenience, NR-U (New Radio Unlicensed) aimed at system operations conforming to various regulation-related requirements in unlicensed bands, NR UE Power Saving, Non-Terrestrial Network (NTN) which is UE-satellite direct communication for providing coverage in an area in which communication with terrestrial networks is unavailable, and positioning.

[0005] Moreover, there has been ongoing standardization in air interface architecture / protocol regarding technologies such as Industrial Internet of Things (IIoT) for supporting new services through interworking and convergence with other industries, IAB (Integrated Access and Backhaul) for providing a node for network service area expansion by supporting a wireless backhaul link and an access link in an integrated manner, mobility enhancement including conditional handover and DAPS (Dual Active Protocol Stack) handover, and two-step random access for simplifying random access procedures (2-step RACH for NR). There also has been ongoing standardization in system architecture / service regarding a 5G baseline architecture (for example, service based architecture or service based interface) for combining Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies, and Mobile Edge Computing (MEC) for receiving services based on UE positions.

[0006] As 5G mobile communication systems are commercialized, connected devices that have been exponentially increasing will be connected to communication networks, and it is accordingly expected that enhanced functions and performances of 5G mobile communication systems and integrated operations of connected devices will be necessary. To this end, new research is scheduled in connection with eXtended Reality (XR) for efficiently supporting AR (Augmented Reality), VR (Virtual Reality), MR (Mixed Reality) and the like, 5G performance improvement and complexity reduction by utilizing Artificial Intelligence (AI) and Machine Learning (ML), AI service support, metaverse service support, and drone communication.

[0007] Furthermore, such development of 5G mobile communication systems will serve as a basis for developing not only new waveforms for providing coverage in terahertz bands of 6G mobile communication technologies, multi-antenna transmission technologies such as Full Dimensional MIMO (FD-MIMO), array antennas and large-scale antennas, metamaterial-based lenses and antennas for improving coverage of terahertz band signals, high-dimensional space multiplexing technology using OAM (Orbital Angular Momentum), and RIS (Reconfigurable Intelligent Surface), but also full-duplex technology for increasing frequency efficiency of 6G mobile communication technologies and improving system networks, AI-based communication technology for implementing system optimization by utilizing satellites and AI (Artificial Intelligence) from the design stage and internalizing end-to-end AI support functions, and next-generation distributed computing technology for implementing services at levels of complexity exceeding the limit of UE operation capability by utilizing ultra-high-performance communication and computing resources.

[0008] In order to meet the increasing demand for wireless data communication services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or pre-5G communication systems. Therefore, 5G or pre-5G communication systems are also called "Beyond 4G networks" or "Post-LTE systems".

[0009] In order to achieve a higher data rate, 5G communication systems are implemented in higher frequency (millimeter, mmWave) bands, e.g., 60 GHz bands. In order to reduce propagation loss of radio waves and increase a transmission distance, technologies such as beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antenna, analog beamforming and large-scale antenna are discussed in 5G communication systems.

[0010] In addition, in 5G communication systems, developments of system network improvement are underway based on advanced small cell, cloud radio access network (RAN), ultra-dense network, device-to-device (D2D) communication, wireless backhaul, mobile network, cooperative communication, coordinated multi-points (CoMP), reception-end interference cancellation, etc.

[0011] In 5G systems, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC) as advanced coding modulation (ACM), and filter bank multicarrier (FBMC), non-orthogonal multiple access (NOMA) and sparse code multiple access (SCMA) as advanced access technologies have been developed.

[0012] The present disclosure provides a method performed by a user equipment, a method performed by a base station, a user equipment and a base station, which can avoid the influence of the change in antenna configuration on the receiving performance of a physical downlink shared channel and can satisfy the power saving requirement of the base station. The following technical solutions are employed.

[0013] In accordance with the first aspect of the present disclosure, a method executed by a user equipment (UE) in a wireless communication system is provided, including:

[0014] receiving first information through a first high-layer signaling, the first information being used to configure a first channel state information (CSI)-reference signal (RS) resource;

[0015] in a case where second information is received through a physical layer signaling or a medium access control (MAC) layer signaling, determining a resource for receiving a physical downlink shared channel (PDSCH) according to the first information or the second information, the second information indicating a second CSI-RS resource for determining CSI; and

[0016] receiving a PDSCH on the determined resource.

[0017] In one possible implementation, in a case where the first CSI-RS resource and the second CSI-RS resource are NZP CSI-RS resources and the resource elements (REs) occupied by the second CSI-RS resource is a subset of the REs occupied by the first CSI-RS resource, determining the resource for receiving a PDSCH according to the first information.

[0018] In another possible implementation, the determining the resource for receiving a PDSCH according to the first information includes:

[0019] determining a RE for receiving a PDSCH according to the REs occupied by the first CSI-RS resource; and

[0020] the receiving a PDSCH on the determined resource includes:

[0021] receiving a PDSCH on the determined RE.

[0022] In still another possible implementation, the method further includes:

[0023] determining, according to the time-frequency configuration and correspondence of the first CSI-RS resource, a candidate time-frequency configuration set of the second CSI-RS resource; and

[0024] determining a time-frequency configuration of the second CSI-RS resource according to the second information, the time-frequency configuration of the second CSI-RS resource being at least one time-frequency configuration in the candidate time-frequency configuration set;

[0025] wherein the correspondence includes the time-frequency configuration of the first NZP CSI-RS resource and the candidate time-frequency configuration set of the second NZP CSI-RS resource.

[0026] In yet another possible implementation, in the correspondence, the time-frequency configuration of the first NZP CSI-RS resource is indicated by a first index, and the candidate time-frequency configuration of the second NZP CSI-RS resource is indicated by at least one second index; and

[0027] the candidate time-frequency configuration indicated by each index in the at least one second index is a part of the time-frequency configuration indicated by the first index corresponding to the at least one second index.

[0028] In yet another possible implementation, the second CSI-RS resource is an NZP CSI-RS resource, and the determining the resource for receiving a PDSCH according to the second information includes:

[0029] determining a RE for receiving a PDSCH according to the REs occupied by the second CSI-RS resource; and

[0030] the receiving a PDSCH on the determined resource includes:

[0031] receiving a PDSCH on the determined RE.

[0032] In yet another possible implementation, the method further includes:

[0033] receiving first configuration information through a second high-layer signaling, the first configuration information being used to indicate determining the resource for receiving a PDSCH based on the first information or the second information; and

[0034] determining the resource for receiving a PDSCH according to the indication of the first configuration information.

[0035] In yet another possible implementation, the method further includes:

[0036] receiving second configuration information for configuring a candidate CSI-RS resource set through a third high- layer signaling, the candidate CSI-RS resource set being an CSI-RS resource set corresponding to the first CSI-RS resource or a subset of the CSI-RS resource set corresponding to the first CSI-RS resource; and

[0037] determining the second CSI-RS resource according to the second information, the second CSI-RS resource being at least one CSI-RS resource in the candidate CSI-RS resource set.

[0038] In yet another possible implementation, the method further includes:

[0039] in a case where third information is received through a physical layer signaling or an MAC layer signaling, determining a resource for receiving a PDSCH according to the third information, the third information being used to indicate a ZP CSI-RS resource.

[0040] The third information is transmitted by the base station through a physical layer signal or an MAC layer signaling in a case where the first CSI-RS resource does not include CSI-RS resources configured for other UEs by the base station.

[0041] In accordance with the second aspect of the present disclosure, a method executed by a base station in a wireless communication system is provided, including:

[0042] transmitting first information to a UE through a first high-layer signaling, the first information being used to configure a first CSI-RS resource;

[0043] in a case where second information is transmitted through a physical layer signaling or an MAC layer signaling, determining a resource for transmitting a PDSCH according to the first information or the second information, the second indication information indicating a second CSI-RS resource for determining CSI; and

[0044] transmitting a PDSCH on the determined resource.

[0045] In one possible implementation, in a case where the first CSI-RS resource and the second CSI-RS resource are NZP CSI-RS resources and the resource elements (REs) occupied by the second CSI-RS resource is a subset of the REs occupied by the first CSI-RS resource, the resource for transmitting a PDSCH is determined according to the first information.

[0046] In another possible implementation, the determining the resource for transmitting a PDSCH according to the first information includes:

[0047] determining a RE for transmitting a PDSCH according to the REs occupied by the first CSI-RS resource; and

[0048] the transmitting a PDSCH on the determined resource includes:

[0049] transmitting a PDSCH on the determined RE.

[0050] In still another possible implementation, the method further includes:

[0051] determining, according to the time-frequency configuration and correspondence of the first CSI-RS resource, a candidate time-frequency configuration set of the second CSI-RS resource; and

[0052] determining a time-frequency configuration of the second CSI-RS resource according to the second information, the time-frequency configuration of the second CSI-RS resource being at least one time-frequency configuration in the candidate time-frequency configuration set;

[0053] wherein the correspondence includes the time-frequency configuration of the first NZP CSI-RS resource and the candidate time-frequency configuration set of the second NZP CSI-RS resource.

[0054] In yet another possible implementation, in the correspondence, the time-frequency configuration of the first NZP CSI-RS resource is indicated by a first index, and the candidate time-frequency configuration of the second NZP CSI-RS resource is indicated by at least one second index; and

[0055] the candidate time-frequency configuration indicated by each index in the at least one second index is a part of the time-frequency configuration indicated by the first index corresponding to the at least one second index.

[0056] In yet another possible implementation, the second CSI-RS resource is an NZP CSI-RS resource, and the determining the resource for transmitting a PDSCH according to the second information includes:

[0057] determining a RE for transmitting a PDSCH according to the REs occupied by the second CSI-RS resource; and

[0058] the transmitting a PDSCH on the determined resource includes:

[0059] transmitting a PDSCH on the determined RE.

[0060] In yet another possible implementation, the method further includes:

[0061] transmitting first configuration information to the UE through a second high-layer signaling, the first configuration information being used to indicate the UE determining a resource for receiving a PDSCH based on the first indication information or the second indication information.

[0062] In yet another possible implementation, the method further includes:

[0063] transmitting second configuration information for configuring a candidate CSI-RS resource set to the UE through a third high-layer signaling, the candidate CSI-RS resource set being an CSI-RS resource set corresponding to the first CSI-RS resource or a subset of the CSI-RS resource set corresponding to the first CSI-RS resource.

[0064] In yet another possible implementation, in a case where the first CSI-RS resource does not include CSI-RS resources configured for other UEs by the base station, this information is transmitted to the UE through a physical layer signaling or an MAC layer signaling, and the third information is used to indicate a ZP CSI-RS resource; and

[0065] a resource for transmitting a PDSCH is determined according to the CSI-RS resource indicated by the third information.

[0066] In accordance with the third aspect of the present disclosure, a user equipment is provided, including:

[0067] a transceiver; and

[0068] a controller, which is coupled to the transceiver and configured to execute the operations corresponding to the method described in the first aspect of the present disclosure.

[0069] In accordance with the fourth aspect of the present disclosure, a base station is provided, including:

[0070] a transceiver; and

[0071] a controller, which is coupled to the transceiver and configured to execute the operations corresponding to the method described in the second aspect of the present disclosure.

[0072] In accordance with the fifth aspect of the present disclosure, a computer-readable storage medium is provided, the computer-readable storage medium having computer programs stored thereon that, when executed by a processor, implement the method described in the first aspect or the second aspect of the present disclosure.

[0073] By using the solutions of the present disclosure, the receiving resource occupied by CSI-RS caused by the change in antenna configuration can be determined more accurately, thereby avoiding that a base station and a UE have different understandings for the receiving resource occupied by CSI-RS, and ensuring the receiving performance of a PDSCH.

[0074] In the solutions of the present disclosure, the receiving resource occupied by CSI-RS caused by the change in antenna configuration can be determined more accurately, thereby avoiding that a base station and a UE have different understandings for the receiving resource occupied by CSI-RS, and ensuring the receiving performance of a PDSCH.

[0075] Exemplary embodiments of the present disclosure will be further described below with reference to the accompanying drawings.

[0076] The text and the accompanying drawings are merely provided as examples to help in understanding the present disclosure. They should not be construed as limiting the scope of the present disclosure in any way. Although some embodiments and examples have been provided, based on the contents disclosed herein, it is obvious for those skilled in the art that alterations can be made to the illustrated embodiments and examples without departing from the scope of the present disclosure.

[0077] FIG. 1 illustrates an example wireless network according to various embodiments of the present disclosure;

[0078] FIGS. 2a and 2b illustrate example wireless transmission and reception paths according to the present disclosure;

[0079] FIG. 3a illustrates an example UE according to the present disclosure;

[0080] FIG. 3b illustrates an example base station according to the present disclosure;

[0081] FIG. 4 illustrates a flowchart of a method executed by a UE in a communication system according to an embodiment of the present disclosure;

[0082] FIG. 5 illustrates a flowchart of a method executed by a base station in a communication system according to an embodiment of the present disclosure;

[0083] FIG. 6 illustrates a schematic diagram of a first NZP CSI-RS resource and a second NZP CSI-RS resource according to the present disclosure;

[0084] Fig. 7 illustrates a schematic diagram of cross-carrier scheduling according to an embodiment of the present disclosure; and

[0085] FIG. 8 illustrates a schematic structure diagram of a base station according to an embodiment of the present disclosure.

[0086] The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of various embodiments of the present disclosure as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the various embodiments described herein can be made without departing from the scope and spirit of the present disclosure. In addition, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.

[0087] The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the present disclosure. Accordingly, it should be apparent to those skilled in the art that the following description of various embodiments of the present disclosure is provided for illustration purpose only and not for the purpose of limiting the present disclosure as defined by the appended claims and their equivalents.

[0088] It is to be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component surface" includes reference to one or more of such surfaces.

[0089] The term "include" or "may include" refers to the existence of a corresponding disclosed function, operation or component which can be used in various embodiments of the present disclosure and does not limit one or more additional functions, operations, or components. The terms such as "include" and / or "have" may be construed to denote a certain characteristic, number, step, operation, constituent element, component or a combination thereof, but may not be construed to exclude the existence of or a possibility of addition of one or more other characteristics, numbers, steps, operations, constituent elements, components or combinations thereof.

[0090] The term "or" used in various embodiments of the present disclosure includes any or all of combinations of listed words. For example, the expression "A or B" may include A, may include B, or may include both A and B.

[0091] Unless defined differently, all terms used herein, which include technical terminologies or scientific terminologies, have the same meaning as that understood by a person skilled in the art to which the present disclosure belongs. Such terms as those defined in a generally used dictionary are to be interpreted to have the meanings equal to the contextual meanings in the relevant field of art, and are not to be interpreted to have ideal or excessively formal meanings unless clearly defined in the present disclosure.

[0092] FIG. 1 illustrates an example wireless network 100 according to various embodiments of the present disclosure. The embodiment of the wireless network 100 shown in FIG. 1 is for illustration only. Other embodiments of the wireless network 100 can be used without departing from the scope of the present disclosure.

[0093] The wireless network 100 includes a gNodeB (gNB) 101, a gNB 102, and a gNB 103. The gNB 101 communicates with the gNB 102 and gNB 103. The gNB 101 also communicates with at least one Internet Protocol (IP) network 130, such as the Internet, a private IP network, or other data network.

[0094] Depending on a type of the network, other well-known terms such as "base station" or "access point" can be used instead of "gNodeB" or "gNB". For convenience, the terms "gNodeB" and "gNB" are used in this patent document to refer to network infrastructure components that provide wireless access for remote terminals. And, depending on the type of the network, other well-known terms such as "mobile station", "user station", "remote terminal", "wireless terminal" or "user apparatus" can be used instead of "user equipment" or "UE". For convenience, the terms "user equipment" and "UE" are used in this patent document to refer to remote wireless devices that wirelessly access the gNB, no matter whether the UE is a mobile device (such as a mobile phone or a smart phone) or a fixed device (such as a desktop computer or a vending machine).

[0095] The gNB 102 provides wireless broadband access to the network 130 for a plurality of first User Equipments (UEs) within a coverage area 120 of the gNB 102. The plurality of first UEs include a UE 111, which may be located in a Small Business (SB); a UE 112, which may be located in an enterprise (E); a UE 113, which may be located in a WiFi Hotspot (HS); a UE 114, which may be located in a first residence (R); a UE 115, which may be located in a second residence (R); a UE 116, which may be a mobile device (M), such as a cellular phone, a wireless laptop computer, a wireless PDA, etc. The gNB 103 provides wireless broadband access to the network 130 for a plurality of second UEs within the coverage area 125 of the gNB 103. The plurality of second UEs include a UE 115 and a UE 116. In some embodiments, one or more of gNBs 101-103 can communicate with each other and with UEs 111-116 using 5G, Long Term Evolution (LTE), LTE-A, WiMAX or other advanced wireless communication technologies.

[0096] The dashed lines show approximate ranges of the coverage areas 120 and 125, and the ranges are shown as approximate circles merely for illustration and explanation purposes. It should be clearly understood that the coverage areas associated with the gNBs, such as the coverage areas 120 and 125, may have other shapes, including irregular shapes, depending on configurations of the gNBs and changes in the radio environment associated with natural obstacles and man-made obstacles.

[0097] As will be described in more detail below, one or more of gNB 101, gNB 102, and gNB 103 include a 2D antenna array as described in embodiments of the present disclosure. In some embodiments, one or more of gNB 101, gNB 102, and gNB 103 support codebook designs and structures for systems with 2D antenna arrays.

[0098] Although FIG. 1 illustrates an example of a wireless network 100, it may make various changes to FIG. 1. The wireless network 100 can include any number of gNBs and any number of UEs in any suitable arrangement, for example. Furthermore, the gNB 101 can directly communicate with any number of UEs and provide wireless broadband access to the network 130 for those UEs. Similarly, each gNB 102-103 can directly communicate with the network 130 and provide direct wireless broadband access to the network 130 for the UEs. In addition, gNB 101, 102 and / or 103 can provide access to other or additional external networks, such as external telephone networks or other types of data networks.

[0099] FIGs. 2a and 2b illustrate example wireless transmission and reception paths according to the present disclosure. In the following description, the transmission path 200 can be described as being implemented in a gNB, such as gNB 102, and the reception path 250 can be described as being implemented in a UE, such as UE 116. However, it should be understood that the reception path 250 can be implemented in a gNB and the transmission path 200 can be implemented in a UE. In some embodiments, the reception path 250 is configured to support codebook designs and structures for systems with 2D antenna arrays as described in embodiments of the present disclosure.

[0100] The transmission path 200 includes a channel coding and modulation block 205, a Serial-to-Parallel (S-to-P) block 210, a size N Inverse Fast Fourier Transform (IFFT) block 215, a Parallel-to-Serial (P-to-S) block 220, a cyclic prefix addition block 225, and an up-converter (UC) 230. The reception path 250 includes a down-converter (DC) 255, a cyclic prefix removal block 260, a Serial-to-Parallel (S-to-P) block 265, a size N Fast Fourier Transform (FFT) block 270, a Parallel-to-Serial (P-to-S) block 275, and a channel decoding and demodulation block 280.

[0101] In the transmission path 200, the channel coding and modulation block 205 receives a set of information bits, applies coding (such as Low Density Parity Check (LDPC) coding), and modulates the input bits (such as using Quadrature Phase Shift Keying (QPSK) or Quadrature Amplitude Modulation (QAM)) to generate a sequence of frequency-domain modulated symbols. The Serial-to-Parallel (S-to-P) block 210 converts (such as demultiplexes) serial modulated symbols into parallel data to generate N parallel symbol streams, where N is a size of the IFFT / FFT used in gNB 102 and UE 116. The size N IFFT block 215 performs IFFT operations on the N parallel symbol streams to generate a time-domain output signal. The Parallel-to-Serial block 220 converts (such as multiplexes) parallel time-domain output symbols from the Size N IFFT block 215 to generate a serial time-domain signal. The cyclic prefix addition block 225 inserts a cyclic prefix into the time-domain signal. The up-converter 230 modulates (such as up-converts) the output of the cyclic prefix addition block 225 to an RF frequency for transmission via a wireless channel. The signal can also be filtered at a baseband before switching to the RF frequency.

[0102] The RF signal transmitted from gNB 102 arrives at UE 116 after passing through the wireless channel, and operations in reverse to those at gNB 102 are performed at UE 116. The down-converter 255 down-converts the received signal to a baseband frequency, and the cyclic prefix removal block 260 removes the cyclic prefix to generate a serial time-domain baseband signal. The Serial-to-Parallel block 265 converts the time-domain baseband signal into a parallel time-domain signal. The Size N FFT block 270 performs an FFT algorithm to generate N parallel frequency-domain signals. The Parallel-to-Serial block 275 converts the parallel frequency-domain signal into a sequence of modulated data symbols. The channel decoding and demodulation block 280 demodulates and decodes the modulated symbols to recover the original input data stream.

[0103] Each of gNBs 101-103 may implement a transmission path 200 similar to that for transmitting to UEs 111-116 in the downlink, and may implement a reception path 250 similar to that for receiving from UEs 111-116 in the uplink. Similarly, each of UEs 111-116 may implement a transmission path 200 for transmitting to gNBs 101-103 in the uplink, and may implement a reception path 250 for receiving from gNBs 101-103 in the downlink.

[0104] Each of the components in FIGs. 2a and 2b can be implemented using only hardware, or using a combination of hardware and software / firmware. As a specific example, at least some of the components in FIGs. 2a and 2b may be implemented in software, while other components may be implemented in configurable hardware or a combination of software and configurable hardware. For example, the FFT block 270 and IFFT block 215 may be implemented as configurable software algorithms, in which the value of the size N may be modified according to the implementation.

[0105] Furthermore, although described as using FFT and IFFT, this is only illustrative and should not be interpreted as limiting the scope of the present disclosure. Other types of transforms can be used, such as Discrete Fourier transform (DFT) and Inverse Discrete Fourier Transform (IDFT) functions. It should be understood that for DFT and IDFT functions, the value of variable N may be any integer (such as 1, 2, 3, 4, etc.), while for FFT and IFFT functions, the value of variable N may be any integer which is a power of 2 (such as 1, 2, 4, 8, 16, etc.).

[0106] Although FIGs. 2a and 2b illustrate examples of wireless transmission and reception paths, various changes may be made to FIGs. 2a and 2b. For example, various components in FIGs. 2a and 2b can be combined, further subdivided or omitted, and additional components can be added according to specific requirements. Furthermore, FIGs. 2a and 2b are intended to illustrate examples of types of transmission and reception paths that can be used in a wireless network. Any other suitable architecture can be used to support wireless communication in a wireless network.

[0107] FIG. 3a illustrates an example UE 116 according to the present disclosure. The embodiment of UE 116 shown in FIG. 3a is for illustration only, and UEs 111-115 of FIG. 1 can have the same or similar configuration. However, a UE has various configurations, and FIG. 3a does not limit the scope of the present disclosure to any specific implementation of the UE.

[0108] UE 116 includes an antenna 305, a radio frequency (RF) transceiver 310, a transmission (TX) processing circuit 315, a microphone 320, and a reception (RX) processing circuit 325. UE 116 also includes a speaker 330, a processor / controller 340, an input / output (I / O) interface (IF) 345, an input device(s) 350, a display 355, and a memory 360. The memory 360 includes an operating system (OS) 361 and one or more applications 362.

[0109] The RF transceiver 310 receives an incoming RF signal transmitted by a gNB of the wireless network 100 from the antenna 305. The RF transceiver 310 down-converts the incoming RF signal to generate an intermediate frequency (IF) or baseband signal. The IF or baseband signal is transmitted to the RX processing circuit 325, where the RX processing circuit 325 generates a processed baseband signal by filtering, decoding and / or digitizing the baseband or IF signal. The RX processing circuit 325 transmits the processed baseband signal to speaker 330 (such as for voice data) or to processor / controller 340 for further processing (such as for web browsing data).

[0110] The TX processing circuit 315 receives analog or digital voice data from microphone 320 or other outgoing baseband data (such as network data, email or interactive video game data) from processor / controller 340. The TX processing circuit 315 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The RF transceiver 310 receives the outgoing processed baseband or IF signal from the TX processing circuit 315 and up-converts the baseband or IF signal into an RF signal transmitted via the antenna 305.

[0111] The processor / controller 340 can include one or more processors or other processing devices and execute an OS 361 stored in the memory 360 in order to control the overall operation of UE 116. For example, the processor / controller 340 can control the reception of forward channel signals and the transmission of backward channel signals through the RF transceiver 310, the RX processing circuit 325 and the TX processing circuit 315 according to well-known principles. In some embodiments, the processor / controller 340 includes at least one microprocessor or microcontroller.

[0112] The processor / controller 340 is also capable of executing other processes and programs residing in the memory 360, such as operations for channel quality measurement and reporting for systems with 2D antenna arrays as described in embodiments of the present disclosure. The processor / controller 340 can move data into or out of the memory 360 as required by an execution process. In some embodiments, the processor / controller 340 is configured to execute the application 362 based on the OS 361 or in response to signals received from the gNB or the operator. The processor / controller 340 is also coupled to an I / O interface 345, where the I / O interface 345 provides UE 116 with the ability to connect to other devices such as laptop computers and handheld computers. I / O interface 345 is a communication path between these accessories and the processor / controller 340.

[0113] The processor / controller 340 is also coupled to the input device(s) 350 and the display 355. An operator of UE 116 can input data into UE 116 using the input device(s) 350. The display 355 may be a liquid crystal display or other display capable of presenting text and / or at least limited graphics (such as from a website). The memory 360 is coupled to the processor / controller 340. A part of the memory 360 can include a random access memory (RAM), while another part of the memory 360 can include a flash memory or other read-only memory (ROM).

[0114] Although FIG. 3a illustrates an example of UE 116, various changes can be made to FIG. 3a. For example, various components in FIG. 3a can be combined, further subdivided or omitted, and additional components can be added according to specific requirements. As a specific example, the processor / controller 340 can be divided into a plurality of processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). Furthermore, although FIG. 3a illustrates that the UE 116 is configured as a mobile phone or a smart phone, UEs can be configured to operate as other types of mobile or fixed devices.

[0115] FIG. 3b illustrates an example gNB 102 according to the present disclosure. The embodiment of gNB 102 shown in FIG. 3b is for illustration only, and other gNBs of FIG. 1 can have the same or similar configuration. However, a gNB has various configurations, and FIG. 3b does not limit the scope of the present disclosure to any specific implementation of a gNB. It should be noted that gNB 101 and gNB 103 can include the same or similar structures as gNB 102.

[0116] As shown in FIG. 3b, gNB 102 includes a plurality of antennas 370a-370n, a plurality of RF transceivers 372a-372n, a transmission (TX) processing circuit 374, and a reception (RX) processing circuit 376. In certain embodiments, one or more of the plurality of antennas 370a-370n include a 2D antenna array. gNB 102 also includes a controller / processor 378, a memory 380, and a backhaul or network interface 382.

[0117] RF transceivers 372a-372n receive an incoming RF signal from antennas 370a-370n, such as a signal transmitted by UEs or other gNBs. RF transceivers 372a-372n down-convert the incoming RF signal to generate an IF or baseband signal. The IF or baseband signal is transmitted to the RX processing circuit 376, where the RX processing circuit 376 generates a processed baseband signal by filtering, decoding and / or digitizing the baseband or IF signal. RX processing circuit 376 transmits the processed baseband signal to controller / processor 378 for further processing.

[0118] The TX processing circuit 374 receives analog or digital data (such as voice data, network data, email or interactive video game data) from the controller / processor 378. TX processing circuit 374 encodes, multiplexes and / or digitizes outgoing baseband data to generate a processed baseband or IF signal. RF transceivers 372a-372n receive the outgoing processed baseband or IF signal from TX processing circuit 374 and up-convert the baseband or IF signal into an RF signal transmitted via antennas 370a-370n.

[0119] The controller / processor 378 can include one or more processors or other processing devices that control the overall operation of gNB 102. For example, the controller / processor 378 can control the reception of forward channel signals and the transmission of backward channel signals through the RF transceivers 372a-372n, the RX processing circuit 376 and the TX processing circuit 374 according to well-known principles. The controller / processor 378 can also support additional functions, such as higher-level wireless communication functions. For example, the controller / processor 378 can perform a Blind Interference Sensing (BIS) process such as that performed through a BIS algorithm, and decode a received signal from which an interference signal is subtracted. A controller / processor 378 may support any of a variety of other functions in gNB 102. In some embodiments, the controller / processor 378 includes at least one microprocessor or microcontroller.

[0120] The controller / processor 378 is also capable of executing programs and other processes residing in the memory 380, such as a basic OS. The controller / processor 378 can also support channel quality measurement and reporting for systems with 2D antenna arrays as described in embodiments of the present disclosure. In some embodiments, the controller / processor 378 supports communication between entities such as web RTCs. The controller / processor 378 can move data into or out of the memory 380 as required by an execution process.

[0121] The controller / processor 378 is also coupled to the backhaul or network interface 382. The backhaul or network interface 382 allows gNB 102 to communicate with other devices or systems through a backhaul connection or through a network. The backhaul or network interface 382 can support communication over any suitable wired or wireless connection(s). For example, when gNB 102 is implemented as a part of a cellular communication system, such as a cellular communication system supporting 5G or new radio access technology or NR, LTE or LTE-A, the backhaul or network interface 382 can allow gNB 102 to communicate with other gNBs through wired or wireless backhaul connections. When gNB 102 is implemented as an access point, the backhaul or network interface 382 can allow gNB 102 to communicate with a larger network, such as the Internet, through a wired or wireless local area network or through a wired or wireless connection. The backhaul or network interface 382 includes any suitable structure that supports communication through a wired or wireless connection, such as an Ethernet or an RF transceiver.

[0122] The memory 380 is coupled to the controller / processor 378. A part of the memory 380 can include an RAM, while another part of the memory 380 can include a flash memory or other ROMs. In certain embodiments, a plurality of instructions, such as the BIS algorithm, are stored in the memory. The plurality of instructions are configured to cause the controller / processor 378 to execute the BIS process and decode the received signal after subtracting at least one interference signal determined by the BIS algorithm.

[0123] As will be described in more detail below, the transmission and reception paths of gNB 102 (implemented using RF transceivers 372a-372n, TX processing circuit 374 and / or RX processing circuit 376) support aggregated communication with FDD cells and TDD cells.

[0124] Although FIG. 3b illustrates an example of gNB 102, various changes may be made to FIG. 3b. For example, gNB 102 can include any number of each component shown in FIG. 3a. As a specific example, the access point can include many backhaul or network interfaces 382, and the controller / processor 378 can support routing functions to route data between different network addresses. As another specific example, although shown as including a single instance of the TX processing circuit 374 and a single instance of the RX processing circuit 376, gNB 102 can include multiple instances of each (such as one for each RF transceiver).

[0125] The Channel state information (CSI)-reference signal (RS) resource is indicated through a high-layer signaling, and the UE computes CSI and determine a resource for receiving a PDSCH based on the CSI-RS resource indicated through the high-layer signaling. The UE obtains a channel quality indication (CQI) for the PDSCH according to the measured CSI-RS. The CSI-RS may be non-zero-power (NZP) CSI-RS. During the computation of CQI, it is assumed that the ratio of the energy per resource element (EPRE) of the PDSCH to the EPRE of the NZP CSI-RS is power Control Offset. The UE obtains the power Control Offset by receiving a high-layer signaling, and then computes the CSI. When receiving the PDSCH, the UE will not receive the PDSCH on the resource element (RE) occupied by the NZP CSI-RS. At this time, the resource occupied by the NZP CSI-RS is determined according to the resource occupied by the NZP CSI-RS configured through the high-layer signaling.

[0126] When the antenna configuration is changed, the UE cannot quickly determine the receiving resource occupied by the CSI-RS caused by the change in antenna configuration accurately, so that the receiving performance of the physical downlink shared channel (PDSCH) will be affected and the power saving requirement of the base station cannot be satisfied.

[0127] In order to solve the above technical problem, the present disclosure provides a method executed by a user equipment, a method executed by a base station, a user equipment and a base station. The UE computes CSI according to the CSI-RS resource indicated through a physical layer signaling or a media access control layer signaling, so that the UE can quickly determine the receiving resource occupied by the CSI-RS caused by the change in antenna configuration accurately, thereby avoiding that the base station and the UE have different understandings for the receiving resource occupied by the CSI-RS and ensuring the receiving performance of the PDSCH. In addition, the speed indicated through the physical layer signaling or media access control layer signaling is faster than that indicated through the high-layer signaling, so the dynamic indication through a physical layer signaling or media access control layer signaling can satisfy the power saving requirement of the base station.

[0128] The technical solutions in the embodiments of the present application and the technical effects achieved by the technical solutions in the present application will be explained below by describing several example implementations. It should be noticed that the following implementations can be referred to, learned from or combined with each other, and the same terms, similar features and similar implementation steps in different implementations will not be repeated.

[0129] FIG. 4 illustrates a flowchart of a method executed by a user equipment (UE) in a communication system according to an embodiment of the present disclosure. As shown in FIG. 4, the method 400 includes the following.

[0130] In step S410, the UE receives first information through a first high-layer signaling, the first information being used to configure a first channel state information (CSI)-reference signal (RS) resource.

[0131] In step S420, the UE receives second information through a physical layer signaling or a media access control (MAC) layer signaling, the second information indicating a second CSI-RS resource for determining CSI.

[0132] Specifically, the UE may determine the power control offset and antenna configuration information for calculating a CQI according to the second indication information, and then computes a CQI according to the power control offset and the antenna configuration information. Wherein,

[0133] In step S430, the UE determines a resource for receiving a physical downlink shared channel (PDSCH) according to the first information or the second information.

[0134] In step S440, the UE receives a PDSCH on the determined resource for receiving a PDSCH.

[0135] In some embodiments, the step S440 may be specifically: in a case where the first CSI-RS resource and the second CSI-RS resource are NZP CSI-RS resources and the resource elements (REs) occupied by the second CSI-RS resource is a subset of the REs occupied by the first CSI-RS resource, determining a RE for receiving a PDSCH according to the REs occupied by the first CSI-RS resource. The step S440 is specifically: receiving, by the UE, a PDSCH on the determined RE. It should also be understood that the RE for receiving a PDSCH is not determined from the REs occupied by the first CSI-RS resource.

[0136] Based on any one of the above embodiments, the method may further include:

[0137] determining, according to the time-frequency configuration and correspondence of the first CSI-RS resource, a candidate time-frequency configuration set of the second CSI-RS resource; and

[0138] determining a time-frequency configuration of the second CSI-RS resource according to the second information, the time-frequency configuration of the second CSI-RS resource being at least one time-frequency configuration in the candidate time-frequency configuration set;

[0139] wherein the correspondence comprises the time-frequency configuration of the first NZP CSI-RS resource and the candidate time-frequency configuration set of the second NZP CSI-RS resource.

[0140] Optionally, the candidate time-frequency configuration set of the second CSI-RS resource may also be a set determined based on the time-frequency configuration and correspondence of the first CSI-RS resource or a subset of the set determined based on the time-frequency configuration and correspondence of the first CSI-RS resource, and the subset may be determined through a high-layer signaling. As an implementable example, when the time-frequency configuration of the first NZP CSI-RS resource is configuration 1, the available candidate time-frequency configuration of the second NZP CSI-RS resource is determined as configuration 2, configuration 3 and configuration 4 through the correspondence, and the candidate time-frequency configuration set of the second CSI-RS resource is configured as configuration 2 and configuration 3 through a high-layer signaling. Then, one time-frequency configuration in the candidate time-frequency configuration set of the second NZP CSI-RS resource is indicated through a 1-bit physical layer signaling. A bit value of "0" indicates that the candidate time-frequency configuration set of the second NZP CSI-RS resource is configuration 2, and a bit value of "1" indicates that the candidate time-frequency configuration set of the second NZP CSI-RS resource is configuration 3.

[0141] Optionally, for the time-frequency configuration of each first CSI-RS resource, the candidate time-frequency set of the second CSI-RS resource may be determined through a high-layer signaling. Then, the candidate time-frequency configuration of one second CSI-RS resource in the candidate time-frequency configuration set of the second CSI-RS resource is indicated through a second signaling of the physical layer signal or MAC layer signaling. As an implementable example, when the time-frequency configuration of the first NZP CSI-RS resource is configuration 1, the candidate time-frequency configuration set of the second NZP CSI-RS resource is configuration 3 and configuration 4, and one time-frequency configuration in the candidate time-frequency configuration set of the second NZP CSI-RS resource is indicated through a 1-bit physical layer signaling. A bit value of "0" indicates that the candidate time-frequency configuration set of the second NZP CSI-RS resource is configuration 3, and a bit value of "1" indicates that the candidate time-frequency configuration set of the second NZP CSI-RS resource is configuration 4.

[0142] The way of using 1 bit in the physical layer signaling is only an example, and the way of using multiple bits. For example, the number of used bits may be determined based on the number of time-frequency configurations in the candidate time-frequency configuration set.

[0143] The above method of indicating through a physical layer signal may also be indicating through an MAC layer signaling. In other words, one or more time-frequency configurations in the candidate time-frequency configuration set of the second CSI-RS resource may be indicated by a bitmap. For example, if there are 4 configurations (i.e., configuration 2 to configuration 5) in the candidate time-frequency configuration set and the bitmap is 0100, the first bit "0" indicates that it is not configuration 2, the second bit "1" indicates that it is configuration 3, the third bit "0" indicates that it is not configuration 4, and the fourth bit "0" indicates that it is not configuration 5.

[0144] In the above embodiment, in the correspondence, the time-frequency configuration of the first NZP CSI-RS resource is indicated by a first index, and the candidate time-frequency configuration of the second NZP CSI-RS resource is indicated by at least one second index. The candidate time-frequency configuration indicated by each index in the at least one second index is a part of the time-frequency configuration indicated by the first index corresponding to the at least one second index.

[0145] Exemplarily, in a case where the first index is 3, one corresponding second index is 2;

[0146] in a case where the first index is 4 and 5, respectively, two corresponding second indexes are the same, and the two second indexes are 2 and 3;

[0147] in a case where the first index is 6, a plurality of corresponding second indexes are 2, 3 and 4;

[0148] in a case where the first index is 7 and 8, respectively, a plurality of corresponding second indexes are the same, and the plurality of second indexes are 2, 3, 4 and 5;

[0149] in a case where the first index is 9, a plurality of corresponding second indexes are 2, 3, 4 and 6;

[0150] in a case where the first index is 10, a plurality of corresponding second indexes are 2, 3, 4, 5, 7 and 8;

[0151] in a case where the first index is 11 and 12, respectively, a plurality of corresponding second indexes are the same, and the plurality of second indexes are 2 and 3, or 2, 3, 4, 5, 6, 7, 8 and 10;

[0152] in a case where the first index is 13, 14 and 15, respectively, a plurality of corresponding second indexes are the same, and the plurality of second indexes are 2 and 3, or 2, 3, 4, 5, 7, 8 and 10; and

[0153] in a case where the first index is 16, 17 and 18, respectively, a plurality of corresponding second indexes are the same, and the plurality of second indexes are 2, 3, 11, 12, 13, 14 and 15, or 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14 and 15.

[0154] It is to be noted that the correspondence between the first index and the second index is only an example and does not constitute any limitations to the present disclosure, and other correspondences are not excluded.

[0155] In some embodiments, the step S440 may be specifically: if the second CSI-RS resource is an NZP-CSI-RS resource, determining a RE for receiving a PDSCH according to the REs occupied by the second CSI-RS resource. The step S440 is specifically: receiving a PDSCH on the determined RE. It should also be understood that the RE for receiving a PDSCH is not determined from the REs occupied by the second CSI-RS resource.

[0156] In some embodiments, the method may further include:

[0157] receiving first configuration information through a second high-layer signaling, the first configuration information being used to indicate the UE determining the resource for receiving a PDSCH based on the first indication information or the second indication information.

[0158] The UE determines the resource for receiving a PDSCH according to the indication of the first configuration information.

[0159] In other words, if the first configuration information is used to indicate the UE determining the resource for receiving a PDSCH based on the first indication information, the UE does not receive a PDSCH on the REs occupied by the first CSI-RS resource; and, if the first configuration information is used to indicate the UE determining the resource for receiving a PDSCH based on the second indication information, the UE does not receive a PDSCH on the REs occupied by the second CSI-RS resource.

[0160] In some embodiments, the method may further include:

[0161] receiving second configuration information for configuring a candidate CSI-RS resource set through a third high-layer signaling, the candidate CSI-RS resource set being an CSI-RS resource set corresponding to the first CSI-RS resource or a subset of the CSI-RS resource set corresponding to the first CSI-RS resource; and

[0162] determining the second CSI-RS resource according to the second information, the second CSI-RS resource being at least one CSI-RS resource in the candidate CSI-RS resource set.

[0163] In other words, the candidate CSI-RS resource set corresponding to the first CSI-RS resource may be configured through a high-layer signaling, and then at least one second CSI-RS resource may be determined from the candidate CSI-RS resource set according to the indication of the physical layer signaling. When the CSI-RS resource set corresponding to the first CSI-RS resource is known, it is also possible to configure the subset of the CSI-RS resource set as the candidate CSI-RS resource set through a high-layer signaling and then determine at least one second CSI-RS resource from the candidate CSI-RS resource set according to the indication of the physical layer signaling, so that it is faster and more convenient to determine the second CSI-RS resource.

[0164] In some embodiments, the method may further include:

[0165] in a case where third information is received through a physical layer signaling or an MAC layer signaling, determining a resource for receiving a PDSCH according to the third information, the third information being used to indicate a ZP CSI-RS resource or a time-frequency configuration of the RE occupied by the ZP CSI-RS resource.

[0166] Specifically, in this embodiment, if the first CSI-RS resource configured through the first high-layer signaling does not include CSI-RS resources configured for other UEs by the base station, the third information is transmitted to the UE through a physical layer signaling or an MAC layer signaling; or, the third information is not transmitted. Therefore, the UE may or may not receive the third information. If the third information is received, a PDSCH resource is determined based on the third information. That is, a RE for receiving PDSCH is determined according to the REs occupied by the ZP CSI-RS resource indicated by the third information. It should also be understood that the PDSCH is not received on the REs occupied by the ZP CSI-RS resource indicated by the third information.

[0167] In the above embodiments, the antenna configuration information may include the mapping of CSI-RS resources in time domain and frequency domain, as shown in Table 3 below.

[0168] FIG. 5 illustrates a flowchart of a method executed by a base station in a communication system according to an embodiment of the present disclosure. As shown in FIG. 5, the method 500 includes the following.

[0169] In step S510, first information is transmitted to a UE through a first high-layer signaling, the first information being used to configure a first CSI-RS resource.

[0170] In step S520, in a case where second information is transmitted through a physical layer signaling or an MAC layer signaling, a resource for transmitting a PDSCH is determined according to the first information or the second information, the second indication information indicating a second CSI-RS resource for determining CSI.

[0171] In step S530, a PDSCH is transmitted on the determined resource for transmitting a PDSCH.

[0172] In some embodiments, the step S520 may be specifically: in a case where the first CSI-RS resource and the second CSI-RS resource are NZP CSI-RS resources and the REs occupied by the second CSI-RS resource is a subset of the REs occupied by the first CSI-RS resource, determining a RE for transmitting a PDSCH according to the REs occupied by the first CSI-RS resource. The step S530 is specifically: transmitting a PDSCH on the determined RE. It should also be understood that the PDSCH is not transmitted on the REs occupied by the first CSI-RS resource.

[0173] Based on this embodiment, the method may further include:

[0174] determining, according to the time-frequency configuration and correspondence of the first CSI-RS resource, a candidate time-frequency configuration set of the second CSI-RS resource; and

[0175] determining a time-frequency configuration of the second CSI-RS resource according to the second information, the time-frequency configuration of the second CSI-RS resource being at least one time-frequency configuration in the candidate time-frequency configuration set;

[0176] wherein the correspondence includes the time-frequency configuration of the first NZP CSI-RS resource and the candidate time-frequency configuration set of the second NZP CSI-RS resource.

[0177] In this embodiment, in the correspondence, the time-frequency configuration of the first NZP CSI-RS resource is indicated by a first index, and the candidate time-frequency configuration of the second NZP CSI-RS resource is indicated by at least one second index. The candidate time-frequency configuration indicated by each index in the at least one second index is a part of the time-frequency configuration indicated by the first index corresponding to the at least one second index.

[0178] In some embodiments, the step S520 may be specifically: if the second CSI-RS resource is an NZP-CSI-RS resource, determining a RE for transmitting a PDSCH according to the REs occupied by the second CSI-RS resource. The step S530 is specifically: transmitting a PDSCH on the determined RE. It should also be understood that the PDSCH is not transmitted on the REs occupied by the second CSI-RS resource.

[0179] In some embodiments, the method may further include:

[0180] transmitting first configuration information through a second high-layer signaling, the first configuration information being used to indicate the UE determining the resource for receiving a PDSCH based on the first indication information or the second indication information. The UE may determine the resource for receiving a PDSCH according to the indication of the received first configuration information. For example, if the first configuration information is used to indicate the UE determining the resource for receiving a PDSCH based on the first indication information, the UE does not receive a PDSCH on the REs occupied by the first CSI-RS resource; and, if the first configuration information is used to indicate the UE determining the resource for receiving a PDSCH based on the second indication information, the UE does not receive a PDSCH on the REs occupied by the second CSI-RS resource.

[0181] In some embodiments, the method may further include:

[0182] transmitting second configuration information for configuring a candidate CSI-RS resource set to the UE through a third high-layer signaling, the candidate CSI-RS resource set being an CSI-RS resource set corresponding to the first CSI-RS resource or a subset of the CSI-RS resource set corresponding to the first CSI-RS resource.

[0183] In some embodiments, the method may further include:

[0184] in a case where the first CSI-RS resource configured through the first high-layer signaling does not include CSI-RS resources configured for other UEs by the base station, transmitting third information to the UE through a physical layer signaling or an MAC layer signaling, the third information being used to indicate an ZP CSI-RS resource. A resource for transmitting a PDSCH is determined according to the CSI-RS resource indicated by the third information. It should also be understood that the PDSCH is not received on the REs occupied by the ZP CSI-RS resource indicated by the third information.

[0185] The specific scheme of determining a resource for receiving a PDSCH when the UE obtains power Control Offset and antenna configuration (spatial domain) information by receiving a physical layer signaling (also called a layer 1 (L1) signaling, which is obtained by receiving DCI) or a media access control layer signaling (also called a layer 2 (L2) signaling) will be described below.

[0186] The second indication information may indicate the second NZP CSI-RS resource by the following method:

[0187] the first indication information indicates the first NZP CSI-RS resource, an NZP CSI-RS resource set is configured through a high-layer signaling, and at least one second NZP CSI-RS resource is selected from the candidate NZP CSI-RS resource set according to the second indication information.

[0188] In one optional implementation, the candidate NZP CSI-RS resource set does not include the first NZP CSI-RS resource indicated by the first indication information. A specific implementation example may be given below.

[0189] The candidate NZP CSI-RS resource set does not include the first NZP CSI-RS resource indicated by the first indication information, and the candidate NZP CSI-RS resource set configured through the high-layer signaling includes two candidate second NZP CSI-RS resources, i.e., candidate second NZP CSI-RS resource 1 and candidate second NZP CSI-RS resource 2, respectively. The second indication information is 1 bit, and the value of the second indication information and the indicated second NZP CSI-RS resource may be shown in Table 1 below.

[0190] Table 1: Correspondence between the value of the second indication information and the indicated second NZP CSI-RS resource

[0191]

[0192] In another optional implementation, the candidate NZP CSI-RS resource set includes the first NZP CSI-RS resource indicated by the first indication information. A specific implementation example may be given below.

[0193] The candidate NZP CSI-RS resource set includes the first NZP CSI-RS resource indicated by the first indication information, and the candidate NZP CSI-RS resource set configured through the high-layer signaling includes one candidate second NZP CSI-RS resource 1. The second indication information is 1 bit, and the value of the second indication information and the indicated second NZP CSI-RS resource may be shown in Table 2 below.

[0194] Table 2: Correspondence between the value of the second indication information and the indicated second NZP CSI-RS resource

[0195]

[0196] It is to be noted that, in this embodiment, when the second NZP CSI-RS resource is selected from the candidate NZP CSI-RS resource set including the first NZP CSI-RS resource indicated by the first indication information, selection may be performed according to whether it is necessary to consider power saving in the actual situation. If it is necessary to save more power, the candidate second NZP CSI-RS resource 1 is selected; or, the first NZP CSI-RS resource may be selected.

[0197] Embodiment 1:

[0198] In S11, the UE obtains a first NZP CSI-RS resource by receiving a signaling (e.g., a high-layer signaling). The NZP CSI-RS resource may be called an initial NZP CSI-RS resource.

[0199] In S12, the UE obtains a second NZP CSI-RS resource by receiving a physical layer signaling or an MAC layer signaling. The NZP CSI-RS resource may be called an adjusted NZP CSI-RS resource. At this time, the UE obtains CSI by measuring the second NZP CSI-RS.

[0200] In S13, the UE determines a RE for receiving a PDSCH according to the REs occupied by the first NZP CSI-RS resource. It should also be understood that the UE does not receive a PDSCH on the REs occupied by the first NZP CSI-RS resource.

[0201] By using this method, the antenna configuration can be adjusted in time by receiving a physical layer signaling or an MAC layer signaling, thereby saving power of the base station, and avoiding the influence on PDSCH performance caused by different understandings of the receiving resource occupied by the reference signal between the base station and the UE. The UE determines the RE occupied by the NZP CSI-RS resource when receiving a PDSCH by receiving a high-layer signaling.

[0202] In this embodiment, the UE determines a RE for receiving a PDSCH according to the REs occupied by the first NZP CSI-RS resource, ensuring that the receiving performance of the PDSCH is not affected. Thus, it is necessary to constrain the REs occupied by the second NZP CSI-RS resource, and the following specific constraint way may be adopted.

[0203] Way 1:

[0204] The dynamically indicated second NZP CSI-RS resource does not exceed the scope of the first NZP CSI-RS resource configured through the high-layer signaling. That is, the REs occupied by the second NZP CSI-RS resource are not a subset of the REs occupied by the first NZP CSI-RS resource. In other words, any RE in the REs occupied by the second NZP CSI-RS resource must be included in the REs occupied by the first NZP CSI-RS resource, as shown in FIG. 6.

[0205] By using this method, the UE determines a RE for receiving a PDSCH according to the REs occupied by the first NZP CSI-RS resource, so that the UE will not be affected from correctly determining the resource for receiving a PDSCH regardless of the change of the REs occupied by the second NZP CSI-RS resource.

[0206] Way 2:

[0207] As shown in Table 3, in a slot (which may also be a sub-frame, an OFDM symbol or a time unit, etc.) and in a physical resource block (PRB), the CSI-RS has 18 time-frequency configurations (e.g., the time-frequency configuration of the CSI-RS resource is the configuration of resource element mapping of the CSI-RS resource in time domain and frequency domain), and each time-frequency configuration of the CSI-RS corresponds to the parameter in one row of Table 3. For rows 2, 3, 11, 12, 13, 14, 15, 16, 17 and 18, there are two time-frequency configurations of CSI-RS in each row. That is, one time-frequency configuration of CSI-RS is that each PRB of the frequency domain has the CSI-RS, and another time-frequency configuration of CSR-RS is that only one of two adjacent PRBs of the frequency domain has the CSI-RS. For rows 1, 4, 5, 6, 7, 8, 9 and 10, there is one time-frequency configuration of CSI-RS in each row.

[0208] When the UE obtains the time-frequency configuration (e.g., row x in Table 3) of the first NZP CSI-RS resource according to the received first indication information, the time-frequency configuration of the second NZP CSI-RS resource indicated by the second indication information can only be at least one of {rows x_1, x_2, ..., x_M} in 18 rows in Table 3. In other words, after the time-frequency configuration of the first NZP CSI-RS resource is determined as x, the candidate configuration of the time-frequency configuration of the second NZP CSI-RS resource corresponding to the time-frequency configuration of the first NZP CSI-RS resource can only be the time-frequency configuration of the NZP CSI-RS resource in the set {rows x_1, x_2, ..., x_M}.

[0209] When the UE obtains the time-frequency configuration (e.g., row y in Table 3) of the first NZP CSI-RS resource according to the received first indication information, the time-frequency configuration of the second NZP CSI-RS resource indicated by the second indication information can only be at least one of {rows y_1, y_2, ..., y_N} in 18 rows in Table 3. In other words, after the time-frequency configuration of the first NZP CSI-RS resource is determined as y, the candidate configuration of the time-frequency configuration of the second NZP CSI-RS resource corresponding to the time-frequency configuration of the first NZP CSI-RS resource can only be the time-frequency configuration of the NZP CSI-RS resource in the set {rows y_1, y_2, ..., y_N}.

[0210] It is to be noted that, in this embodiment, the row x_M indicates the time-frequency configuration of the second NZP CSI-RS resource corresponding to the row x, the row y_M indicates the time-frequency configuration of the second NZP CSI-RS resource corresponding to the row y, and the rows x and y are different rows. For example, if the row x is row 6, the set {rows x_1, x_2, ..., x_M} is {rows 2, 3, 4}; and, if the row y is row 4, the set {rows y_1, y_2, ..., y_N} is {rows 2, 3}.

[0211] Table 3: Locations of REs of CSI-RS in time domain and frequency domain in a slot

[0212]

[0213] After the time-frequency configuration of the first NZP CSI-RS resource is obtained according to the first indication information, the candidate configuration of the time-frequency configuration of the second NZP CSI-RS resource indicated by the second indication information is determined. Specifically, the RE occupied by the NZP CSI-RS of the candidate configuration of the time-frequency configuration of the second NZP CSI-RS resource is the subset of the REs occupied by the time-frequency configuration of the first NZP CSI-RS resource.

[0214] By using this method, the set of the candidate configuration of the time-frequency configuration of the second NZP CSI-RS resource can be directly determined through a protocol, and the network operator can directly select a configuration in the set determined by the protocol to satisfy the requirement without analyzing for selecting the time-frequency configuration of the second NZP CSI-RS resource, thus simplifying the network configuration.

[0215] The scheme of determining the candidate configuration of the time-frequency configuration of the CSI-RS resource will be described below.

[0216] Since there is only one port in rows 1 and 2, when the first indication information indicates that the time-frequency configuration of the first NZP CSI-RS resource is the time-frequency configurations of the NZP CSI-RS resources of rows 1 and 2, there is no candidate time-frequency configuration of the second NZP CSI-RS resource. The candidate time-frequency configurations of the second NZP CSI-RS resource in other rows may refer to Table 4, or Table 5, or Table 6. Table 4, Table 5 and Table 6 illustrate the correspondence between the time-frequency configuration of the first NZP CSI-RS resource and the candidate time-frequency configuration of the second NZP CSI-RS resource.

[0217] The density of the time-frequency configuration of the second NZP CSI-RS resource and the density of the time-frequency configuration of the first NZP CSI-RS resource shown in Table 4 are 1. The density of the time-frequency configuration of the second NZP CSI-RS resource and the density of the time-frequency configuration of the first NZP CSI-RS resource shown in Table 5 are the same, or the density of the time-frequency configuration of the second NZP CSI-RS resource is less than the density of the time-frequency configuration of the first NZP CSI-RS resource. The density of the time-frequency configuration of the second NZP CSI-RS resource and the density of the time-frequency configuration of the first NZP CSI-RS resource shown in Table 6 are 0.5.

[0218] It is to be noted that the candidate time-frequency configurations of the second NZP CSI-RS resource in Table 4, Table 5 and Table 6 are only examples, and other candidate time-frequency configurations of the second NZP CSI-RS resource are not excluded.

[0219] Table 4: Correspondence between the time-frequency configuration of the first NZP CSI-RS resource and the candidate time-frequency configuration of the second NZP CSI-RS resource

[0220]

[0221] Table 5: Correspondence between the time-frequency configuration of the first NZP CSI-RS resource and the candidate time-frequency configuration of the second NZP CSI-RS resource

[0222]

[0223] Table 6: Correspondence between the time-frequency configuration of the first NZP CSI-RS resource and the candidate time-frequency configuration of the second NZP CSI-RS resource

[0224]

[0225] Embodiment 2:

[0226] In S21, the UE obtains a first NZP CSI-RS resource by receiving a signaling (e.g., a high-layer signaling). The NZP CSI-RS resource may be called an initial NZP CSI-RS resource.

[0227] In S22, the UE obtains a second NZP CSI-RS resource by receiving a physical layer signaling or an MAC layer signaling. The NZP CSI-RS resource may be called an adjusted NZP CSI-RS resource. At this time, the UE obtains CSI by measuring the second NZP CSI-RS.

[0228] In S23, the UE determines a RE for receiving a PDSCH according to the REs occupied by the second NZP CSI-RS resource. It should also be understood that the UE does not receive a PDSCH on the REs occupied by the second NZP CSI-RS resource.

[0229] By using this method, the antenna configuration can be adjusted in time by receiving a physical layer signaling or an MAC layer signaling, thereby saving power of the base station. In addition, it is unnecessary to constrain the time-frequency configuration of the second NZP CSI-RS resource.

[0230] Embodiment 3:

[0231] The UE may use the method in Embodiment 1 or Embodiment 2 to determine a RE for receiving a PDSCH by receiving a signaling.

[0232] Specifically, in this embodiment, the UE may decide to use the method in Embodiment 1 to determine a RE for receiving a PDSCH according to the received high-layer signaling configuration, or the UE may decide to use the method in Embodiment 2 to determine a RE for receiving a PDSCH according to the received high-layer signaling configuration. For example, the high-layer signaling configuration is 1 bit. If the received high-layer signaling configuration is 1, the UE decides to use the method in Embodiment 1 to determine a RE for receiving a PDSCH; and, if the received high-layer signaling configuration is 0, the UE decides to use the method in Embodiment 2 to determine a RE for receiving a PDSCH. This is only an example and does not limit the scheme of the embodiment of the present disclosure.

[0233] By using this method, the performance requirements of different receiving PDSCHs can be satisfied flexibly.

[0234] The method of determining REs occupied by the NZP CSI-RS when receiving a PDSCH has been described above.

[0235] The method of determining REs occupied by the zero-power (ZP) CSI-RS when receiving a PDSCH will be described below.

[0236] Embodiment 4:

[0237] The UE receives a physical layer signaling or MAC layer signaling indication (which may correspond to the above third indication information). The indication is used to indicate a ZP CSI-RS resource or a time-frequency configuration of REs occupied by the ZP CSI-RS resource. The UE determines a RE for receiving a PDSCH according to the REs occupied by the ZP CSI-RS resource obtained by receiving the physical layer signaling or MAC layer signaling. It should also be understood that the PDSCH is not received on the REs occupied by the ZP CSI-RS resource.

[0238] By using this method, the ZP CSI-RS resource can be adjusted in time, thereby saving the occupied resources and improving the resources occupied by the PDSCH as far as possible.

[0239] Embodiment 5:

[0240] For a UE configured with a plurality of serving cells, the UE may receive PDCCHs and PDSCHs / physical uplink shared channels (PUSCHs) in the plurality of serving cells. The subcarrier spatial configurations of the plurality of serving cells may be the same or different. However, at present, one PDCCH can only schedule the PDSCH / PUSCH of one serving cell. In order to better save the resources occupied by the PDSCCH, in the scheme provided in the embodiment of the present application, one PDCCH (i.e., the DCI carried in the PDCCH) may schedule the PDSCH / PUSCH of one serving cell, or may schedule a plurality of PDSCHs / PUSCHs of a plurality of (including two) different serving cells. Moreover, based on the scheme provided in the embodiment of the present application, the resources occupied by the PDCCH can be saved more reasonably and effectively, and the performance of the PDSCH / PUSCH scheduled by the PDCCH is little affected.

[0241] As an example, as shown in FIG. 7, the serving cell 1 and the serving cell 2 are two serving cells of one UE. The larger rectangular region in the figure represents the cell resource of the serving cell, and the regions corresponding to the PDCCH and PDSCH in the figure are the cell resources occupied by the PDCCH and PDSCH, respectively. As shown, when the base station issues a DCI to the UE, the DCI may be carried on one PDCCH of the serving cell, and the DCI may schedule PDSCHs of the serving cell 1 and the serving cell 2. In other words, one DCI may correspond to two scheduled cells.

[0242] For the convenience of description, in the embodiment of the present application, the serving cell where the PDCCH carrying the DCI is located (i.e., the serving cell that transmits the DCI) is called a scheduling serving cell, for example, the serving cell in FIG. 7; and, the serving cell where the scheduled PDSCH is located is called a scheduled serving cell, for example, the serving cells 1 and 2 in FIG. 7.

[0243] It should be understood that the scheduled serving cell and the scheduling serving cell may be located in the same serving cell or in different serving cells. When one DCI may schedule the PDSCH of one or more serving cells, the scheduled serving cell may or may not include the scheduling serving cell.

[0244] It is to be noted that, in practical applications, the name of the first DCI or specific DCI is not limited in the embodiment of the present application, the "first" or "specific" is merely used for distinguishing from the DCI in the existing format, and the specific DCI is represented by DCI_x in the following description. In addition, for the convenience of description, the cell that transmits a PDCCH (i.e., the serving cell where the PDCCH carrying the specific DCI is located) is called a first serving cell, and the serving cell scheduled by the specific DCI is called a second serving cell. The second serving cell may or may not include the first serving cell.

[0245] The specific DCI will be described in detail below.

[0246] In an optional embodiment of the present application, the first serving cell or the second serving cell includes a bandwidth part (BWP) of the serving cell.

[0247] In other words, the serving cell in the embodiment of the present application may be the serving cell (i.e., cell) in the general meaning, or may be the BWP of the serving cell. That is, the specific DCI may also be the DCI for scheduling a PDSCH of at least one BWP. The UE may receive a PDSCH on the at least one BWP according to the information of the DCI in one PDCCH. For example, the specific DCI may be used to schedule PDSCHs on two PWPs of two serving cells. For another example, if it is assumed that one serving cell may correspond to a plurality of active BWPs, the PDSCH of at least one second serving cell may also be one or more active BWPs of one serving cell.

[0248] For the convenience of description, the following description will be given by taking one PDCCH (i.e., the DCI carried in the PDCCH) scheduling the PDSCH on at least one serving cell as an example. Of course, it can also be applied to a situation where one PDCCH schedules the PDSCH on at least one BWP.

[0249] In an optional embodiment of the present application, the specific DCI may include at least one of the following indication field:

[0250] a minimum applicable scheduling offset indicator (MASOI) field;

[0251] 1 bit of this field is used to indicate minimumSchedulingOffsetK0 for determining the minimum applicable K0 value and the minimum applicable K2 value, as shown in Table 7. Table 7 describes the definition of this field when the DCI (DCI format 1_1) schedules the PDSCH of one serving cell.

[0252] Table 7: Joint indication of minimum applicable scheduling offset K0 / K2

[0253]

[0254] When the configured DCI format 1_x (e.g., DCI format 1_3) schedules the PDSCH of at least one serving cell, the MASOI may be determined by the following method.

[0255] Method 1:

[0256] The DCI format 1_3 has only one MASOI field for indicating the minimum applicable K0 value and the minimum applicable K2 value of at least one scheduled serving cell. The specific indication method will be described below. The MASOI field is also called a class 1 field.

[0257] Way 1:

[0258] The DCI format 1_3 has only one MASOI field for indicating the minimum applicable K0 value and the minimum applicable K2 value of at least one scheduled serving cell, and the minimum applicable K0 value and the minimum applicable K2 value of each scheduled serving cell are the same, as shown in Table 8. The MASOI field is also called a class 1A field. The advantage of this method is that the same processing requirement can be maintained.

[0259] Table 8: Joint indication of minimum applicable scheduling offset K0 / K2

[0260]

[0261] Way 2:

[0262] The DCI format 1_3 has only one MASOI field for indicating the minimum applicable K0 value and the minimum applicable K2 value of at least one scheduled serving cell, and the minimum applicable K0 value and the minimum applicable K2 value of each scheduled serving cell are separately configured. As shown in Table 9, by taking a PDSCH that schedules two serving cells at most as an example, it can be extended to a situation where a PDSCH schedules more than two serving cells. The MASOI field is also called a class 1B field. The advantage of this method is that the proper processing requirements can be determined for different serving cells.

[0263] Table 9: Joint indication of minimum applicable scheduling offset K0 / K2

[0264]

[0265] Way 3:

[0266] The DCI format 1_3 has only one MASOI field for indicating the minimum applicable K0 value and the minimum applicable K2 value of at least one scheduled serving cell. It is determined through an explicit signaling or implicit signaling that the MASOI field is a class 1A field or a class 1B field. For example, the UE configures it as a class 1A field by receiving a high-layer signaling, that is, the indicated minimum applicable K0 value and minimum applicable K2 value of each scheduled serving cell are the same. Or, the UE configures it as a class 1B field by receiving a high-layer signaling, that is, the indicated minimum applicable K0 value and minimum applicable K2 value of each scheduled serving cell are separately configured. For example, by receiving a high-layer signaling, the UE configures that the MASOI field is a class 1A field when the subcarrier spatial configurations of PDSCHs in serving cells that are scheduled simultaneously must be the same. That is, the indicated minimum applicable K0 value and minimum applicable K2 value of each scheduled serving cell are the same. Or, by receiving a high-layer signaling, the UE configures that the MASOI field is a class 1B field when the subcarrier spatial configurations of PDSCHs in serving cells that are scheduled simultaneously may be different. That is, the indicated minimum applicable K0 value and minimum applicable K2 value of each scheduled serving cell are separately configured. The advantage of this method is that the proper processing requirements are flexibly determined for different serving cells according to different situations.

[0267] Method 2:

[0268] The DCI format 1_3 has M MASOI fields, where M is a positive integer, and M is equal to the minimum number of serving cells in which PDSCHs can be scheduled simultaneously by the DCI format. Each MASOI field is used to indicate the minimum applicable K0 value and the minimum applicable K2 value of one scheduled serving cell. The MASOI field is also called a class 2 field.

[0269] Method 3:

[0270] It is determined through an explicit signaling or implicit signaling whether the MASOI field is determined by Method 1 or Method 2.

[0271] The embodiments of the present disclosure further comprise an electronic device comprising a processor and, optionally, a transceiver and / or memory coupled to the processor configured to perform the steps of the method provided in any of the optional embodiments of the present disclosure.

[0272] FIG. 8 shows a schematic structure diagram of an electronic device to which an embodiment of the present invention is applicable. As shown in FIG. 8, the electronic device 4000 in FIG. 8 includes a processor 4001 and a memory 4003. Wherein, the processor 4001 communicates with the memory 4003, e.g., via a bus 4002. Optionally, the electronic device 4000 may further include a transceiver 4004, and the transceiver 4004 may be used for data interaction between the electronic device and other electronic devices, such as data transmission and / or data reception. It should be noted that, in practical applications, the transceiver 4004 is not limited to one, and the structure of the electronic device 4000 does not constitute a limitation to the embodiments of the present disclosure. Optionally, the electronic device may be a first network node, a second network node or a third network node.

[0273] The processor 4001 may be a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), or a field programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various exemplary logical blocks, modules and circuits described in connection with this disclosure. The processor 4001 may also be a combination for realizing computing functions, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0274] The bus 4002 may include a path to transfer information between the components described above. The bus 4002 may be a peripheral component interconnect (PCI) bus, or an extended industry standard architecture (EISA) bus, etc. The bus 4002 may be an address bus, a data bus, a control bus, etc. For ease of presentation, the bus is represented by only one thick line in FIG. 8. However, it does not mean that there is only one bus or one type of buses.

[0275] The memory 4003 may be, but not limited to, read only memories (ROMs) or other types of static storage devices that can store static information and instructions, random access memories (RAMs) or other types of dynamic storage devices that can store information and instructions, may be electrically erasable programmable read only memories (EEPROMs), compact disc read only memories (CD-ROMs) or other optical disk storages, optical disc storages (including compact discs, laser discs, discs, digital versatile discs, blue-ray discs, etc.), magnetic storage media or other magnetic storage devices, or any other media that can carry or store desired program codes in the form of instructions or data structures and that can be accessed by computers.

[0276] The memory 4003 is used for storing computer programs for executing the embodiments of the present disclosure, and the execution is controlled by the processor 4001. The processor 4001 is configured to execute the computer programs stored in the memory 4003 to implement the steps shown in the foregoing method embodiments.

[0277] Embodiments of the present disclosure provide a computer-readable storage medium having a computer program stored on the computer-readable storage medium, the computer program, when executed by a processor, implements the steps and corresponding contents of the foregoing method embodiments.

[0278] Embodiments of the present disclosure also provide a computer program product including a computer program, the computer program when executed by a processor realizing the steps and corresponding contents of the preceding method embodiments.

[0279] The terms "first", "second", "third", "fourth", "1", "2", etc. (if present) in the specification and claims of the present disclosure and the accompanying drawings above are used to distinguish similar objects and need not be used to describe a particular order or sequence. It should be understood that the data so used is interchangeable where appropriate so that embodiments of the present disclosure described herein can be implemented in an order other than that illustrated or described in the text.

[0280] It should be understood that while the flow diagrams of embodiments of the present disclosure indicate the individual operational steps by arrows, the order in which these steps are performed is not limited to the order indicated by the arrows. Unless explicitly stated herein, in some implementation scenarios of embodiments of the present disclosure, the implementation steps in the respective flowcharts may be performed in other orders as desired. In addition, some, or all of the steps in each flowchart may include multiple sub-steps or multiple phases based on the actual implementation scenario. Some or all of these sub-steps or stages can be executed at the same moment, and each of these sub-steps or stages can also be executed at different moments separately. The order of execution of these sub-steps or stages can be flexibly configured according to requirements in different scenarios of execution time, and the embodiments of the present disclosure are not limited thereto.

Claims

1.A method performed by a user equipment (UE) in a wireless communication system, the method comprising:receiving first information through a first high-layer signaling, the first information being used to configure a first channel state information (CSI)-reference signal (RS) resource;in a case where second information is received through a physical layer signaling or a medium access control (MAC) layer signaling, determining a resource for receiving a physical downlink shared channel (PDSCH) according to the first information or the second information, the second information indicating a second CSI-RS resource for determining CSI; andreceiving a PDSCH on the determined resource.2.The method of claim 1, wherein, in a case where the first CSI-RS resource and the second CSI-RS resource are NZP CSI-RS resources and the resource elements (REs) occupied by the second CSI-RS resource is a subset of the REs occupied by the first CSI-RS resource, determining the resource for receiving a PDSCH according to the first information andwherein the determining the resource for receiving a PDSCH according to the first information comprises:determining a RE for receiving a PDSCH according to the REs occupied by the first CSI-RS resource; andthe receiving a PDSCH on the determined resource comprises:receiving a PDSCH on the determined RE.3.The method of claim 2, further comprising:determining, according to the time-frequency configuration and correspondence of the first CSI-RS resource, a candidate time-frequency configuration set of the second CSI-RS resource; anddetermining a time-frequency configuration of the second CSI-RS resource according to the second information, the time-frequency configuration of the second CSI-RS resource being at least one time-frequency configuration in the candidate time-frequency configuration set;wherein the correspondence comprises the time-frequency configuration of the first NZP CSI-RS resource and the candidate time-frequency configuration set of the second NZP CSI-RS resource, andwherein, in the correspondence, the time-frequency configuration of the first NZP CSI-RS resource is indicated by a first index, and the candidate time-frequency configuration of the second NZP CSI-RS resource is indicated by at least one second index; andwherein the candidate time-frequency configuration indicated by each index in the at least one second index is a part of the time-frequency configuration indicated by the first index corresponding to the at least one second index.4.The method of claim 1, wherein the second CSI-RS resource is an NZP CSI-RS resource, and the determining the resource for receiving a PDSCH according to the second information comprises:determining a RE for receiving a PDSCH according to the REs occupied by the second CSI-RS resource; andwherein the receiving a PDSCH on the determined resource comprises:receiving a PDSCH on the determined RE.5.The method of claim 1, further comprising:receiving first configuration information through a second high-layer signaling, the first configuration information being used to indicate determining the resource for receiving a PDSCH based on the first information or the second information; anddetermining the resource for receiving a PDSCH according to the indication of the first configuration information.6.The method of claim 1, further comprising:receiving second configuration information for configuring a candidate CSI-RS resource set through a third high-layer signaling, the candidate CSI-RS resource set being an CSI-RS resource set corresponding to the first CSI-RS resource or a subset of the CSI-RS resource set corresponding to the first CSI-RS resource; anddetermining the second CSI-RS resource according to the second information, the second CSI-RS resource being at least one CSI-RS resource in the candidate CSI-RS resource set.7.The method of claim 1, further comprising:in a case where third information is received through a physical layer signaling or an MAC layer signaling, determining a resource for receiving a PDSCH according to the third information, the third information being used to indicate a ZP CSI-RS resource.8.A method performed by a base station in a wireless communication system, the method comprising:transmitting first information to a user equipment (UE) through a first high-layer signaling, the first information being used to configure a first channel state information (CSI)-reference (RS) resource;in a case where second information is transmitted through a physical layer signaling or a medium access control (MAC) layer signaling, determining a resource for transmitting a physical downlink shared channel (PDSCH) according to the first information or the second information, the second indication information indicating a second CSI-RS resource for determining CSI; andtransmitting a PDSCH on the determined resource.9.The method of claim 8, wherein, in a case where the first CSI-RS resource and the second CSI-RS resource are NZP CSI-RS resources and the resource elements (REs) occupied by the second CSI-RS resource is a subset of the REs occupied by the first CSI-RS resource, determining the resource for transmitting a PDSCH according to the first information andwherein the determining the resource for transmitting a PDSCH according to the first information comprises:determining a RE for transmitting a PDSCH according to the REs occupied by the first CSI-RS resource; andthe transmitting a PDSCH on the determined resource comprises:transmitting a PDSCH on the determined RE.10.The method of claim 9, further comprising:determining, according to the time-frequency configuration and correspondence of the first CSI-RS resource, a candidate time-frequency configuration set of the second CSI-RS resource; anddetermining a time-frequency configuration of the second CSI-RS resource according to the second information, the time-frequency configuration of the second CSI-RS resource being at least one time-frequency configuration in the candidate time-frequency configuration set;wherein the correspondence comprises the time-frequency configuration of the first NZP CSI-RS resource and the candidate time-frequency configuration set of the second NZP CSI-RS resource, andwherein, in the correspondence, the time-frequency configuration of the first NZP CSI-RS resource is indicated by a first index, and the candidate time-frequency configuration of the second NZP CSI-RS resource is indicated by at least one second index; andwherein the candidate time-frequency configuration indicated by each index in the at least one second index is a part of the time-frequency configuration indicated by the first index corresponding to the at least one second index.11.The method of claim 8, wherein the second CSI-RS resource is an NZP CSI-RS resource, and the determining the resource for transmitting a PDSCH according to the second information comprises:determining a RE for transmitting a PDSCH according to the REs occupied by the second CSI-RS resource; andwherein the transmitting a PDSCH on the determined resource comprises:transmitting a PDSCH on the determined RE.12.The method of claim 8, further comprising:transmitting first configuration information through a second high-layer signaling, the first configuration information being used to indicate determining the resource for transmitting a PDSCH based on the first information or the second information; anddetermining the resource for transmission a PDSCH according to the indication of the first configuration information.13.The method of claim 8, further comprising:transmitting second configuration information for configuring a candidate CSI-RS resource set through a third high-layer signaling, the candidate CSI-RS resource set being an CSI-RS resource set corresponding to the first CSI-RS resource or a subset of the CSI-RS resource set corresponding to the first CSI-RS resource; anddetermining the second CSI-RS resource according to the second information, the second CSI-RS resource being at least one CSI-RS resource in the candidate CSI-RS resource set.14.A user equipment (UE) in a wireless communication system, the UE comprising:a transceiver; andat least one processor configured to:receive first information through a first high-layer signaling, the first information being used to configure a first channel state information (CSI)-reference signal (RS) resource;in a case where second information is received through a physical layer signaling or a medium access control (MAC) layer signaling, determine a resource for receiving a physical downlink shared channel (PDSCH) according to the first information or the second information, the second information indicating a second CSI-RS resource for determining CSI; andreceive a PDSCH on the determined resource.15.A base station in a wireless communication system, the base station comprising:a transceiver; andat least one processor configured to:transmit first information to a user equipment (UE) through a first high-layer signaling, the first information being used to configure a first channel state information (CSI)-reference (RS) resource;in a case where second information is transmitted through a physical layer signaling or a medium access control (MAC) layer signaling, determine a resource for transmitting a physical downlink shared channel (PDSCH) according to the first information or the second information, the second indication information indicating a second CSI-RS resource for determining CSI; andtransmit a PDSCH on the determined resource.

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