Downlink reference signal transmission method and apparatus, terminal, and network side device

Abstract

The present application relates to the technical field of wireless communications, and discloses a downlink reference signal transmission method and apparatus, a terminal, and a network side device. The downlink reference signal transmission method in embodiments of the present application comprises: a terminal receives downlink reference signals transmitted by a network side device by means of frequency hopping transmission; the terminal processes the downlink reference signals of a plurality of hops in the frequency hopping transmission to obtain a jointly processed channel state information measurement result and / or a non-jointly processed channel state information measurement result; and the terminal reports a channel state information report to the network side device, wherein the channel state information report comprises the jointly processed channel state information measurement result and / or the non-jointly processed channel state information measurement result.

Description

Downlink reference signal transmission method, device, terminal and network side equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on December 21, 2023, with application number 202311776966.X and invention name “Downlink reference signal transmission method, device, terminal and network side equipment”. The entire contents of the Chinese patent application are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of wireless communication technology, and specifically relates to a downlink reference signal transmission method, apparatus, terminal, and network-side equipment. Background Art

[0004] In the 6th Generation Mobile Communication Technology (6G) system, a terminal, such as a User Equipment (UE), needs to perform Channel State Information (CSI) measurement over a large bandwidth.

[0005] However, considering the terminal capabilities and processing complexity, how the terminal processes the large-bandwidth CSI-RS is a technical problem that needs to be solved urgently. Summary of the Invention

[0006] The embodiments of the present application provide a downlink reference signal transmission method, apparatus, terminal, and network-side equipment, which can solve the problem of how a terminal processes a CSI-RS with a large bandwidth.

[0007] In a first aspect, a downlink reference signal transmission method is provided, which is performed by a terminal. The method includes:

[0008] The terminal receives a downlink reference signal sent by a network-side device via frequency hopping transmission;

[0009] The terminal processes downlink reference signals of multiple hops in the frequency hopping transmission to obtain a jointly processed channel state information measurement result and / or a non-jointly processed channel state information measurement result;

[0010] The terminal reports a channel state information report to the network-side device, where the channel state information report includes the channel state information measurement result of the joint processing and / or the channel state information measurement result of the non-joint processing.

[0011] In a second aspect, a downlink reference signal transmission method is provided, which is performed by a network-side device. The method includes:

[0012] The network side device sends a downlink reference signal to the terminal through frequency hopping transmission;

[0013] The network side device receives a channel state information report reported by the terminal, where the channel state information report includes a jointly processed channel state information measurement result and / or a non-jointly processed channel state information measurement result obtained after the terminal processes the downlink reference signals of multiple hops in the frequency hopping transmission.

[0014] In a third aspect, a downlink reference signal transmission apparatus is provided, including:

[0015] A first receiving module is configured to receive a downlink reference signal sent by a network-side device via frequency hopping transmission;

[0016] a processing module, configured to process downlink reference signals of multiple hops in the frequency hopping transmission to obtain a jointly processed channel state information measurement result and / or a non-jointly processed channel state information measurement result;

[0017] The reporting module is configured to report a channel state information report to the network side device, where the channel state information report includes the channel state information measurement result of the joint processing and / or the channel state information measurement result of the non-joint processing.

[0018] In a fourth aspect, a downlink reference signal transmission apparatus is provided, including:

[0019] A sending module, configured to send a downlink reference signal to a terminal via frequency hopping transmission;

[0020] The second receiving module is used to receive the channel state information report reported by the terminal, where the channel state information report includes the jointly processed channel state information measurement result and / or the non-jointly processed channel state information measurement result obtained after the terminal processes the downlink reference signals of multiple hops in the frequency hopping transmission.

[0021] In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0022] In a sixth aspect, a terminal is provided, including a processor and a communication interface, wherein:

[0023] The communication interface is used to receive a downlink reference signal sent by a network side device through frequency hopping transmission;

[0024] The processor is configured to process downlink reference signals of multiple hops in the frequency hopping transmission to obtain a jointly processed channel state information measurement result and / or a non-jointly processed channel state information measurement result;

[0025] The communication interface is used to report a channel state information report to the network side device, where the channel state information report includes the channel state information measurement result of the joint processing and / or the channel state information measurement result of the non-joint processing.

[0026] In the seventh aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0027] In an eighth aspect, a network-side device is provided, including a processor and a communication interface, wherein the communication interface is configured to:

[0028] Sending a downlink reference signal to the terminal through frequency hopping transmission;

[0029] Receive a channel state information report reported by the terminal, where the channel state information report includes a jointly processed channel state information measurement result and / or a non-jointly processed channel state information measurement result obtained after the terminal processes the downlink reference signals of multiple hops in the frequency hopping transmission.

[0030] In the ninth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0031] In the tenth aspect, a wireless communication system is provided, comprising: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the network side device can be used to execute the steps of the method described in the second aspect.

[0032] In the eleventh aspect, a chip is provided, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0033] In the twelfth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0034] In an embodiment of the present application, a downlink reference signal sent by a network-side device through frequency hopping transmission is received by a terminal, and the downlink reference signals of multiple hops in the frequency hopping transmission are processed to obtain a jointly processed channel state information measurement result and / or a non-jointly processed channel state information measurement result, and then a channel state information report is reported to the network-side device. The channel state information report includes the jointly processed channel state information measurement result and / or the non-jointly processed channel state information measurement result, so that the terminal can process a large-bandwidth downlink reference signal, and the channel state information report overhead is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG1 shows a block diagram of a wireless communication system to which embodiments of the present application may be applied;

[0036] FIG2 is a schematic diagram of a flow chart of a downlink reference signal transmission method according to an embodiment of the present application;

[0037] FIG3 is a schematic diagram of multiple CSI-RS hop configurations within a CSI-RS resource provided by an embodiment of the present application;

[0038] FIG4 is a schematic diagram of a non-wrapped staircase pattern provided in an embodiment of the present application;

[0039] FIG5 is a schematic diagram of a wrapped staircase pattern provided in an embodiment of the present application;

[0040] FIG6 is a schematic diagram of a staggered pattern provided in an embodiment of the present application;

[0041] FIG7 is a second flow chart of a downlink reference signal transmission method according to an embodiment of the present application;

[0042] FIG8 is a third flow chart of a downlink reference signal transmission method according to an embodiment of the present application;

[0043] FIG9 is a schematic diagram of a structure of a downlink reference signal transmission device according to an embodiment of the present application;

[0044] FIG10 is a second structural diagram of a downlink reference signal transmission apparatus according to an embodiment of the present application;

[0045] FIG11 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0046] FIG12 is a schematic diagram of the hardware structure of a terminal provided in an embodiment of the present application;

[0047] FIG13 is a schematic diagram of the hardware structure of the network side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0048] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0049] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects, for example, the first object can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three options, namely, Option 1: including A but not including B; Option 2: including B but not including A; Option 3: including both A and B. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0050] The term "indication" in this application can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, the operation to be performed, or the requested result, etc. in the instruction sent; an indirect indication can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the operation to be performed or the requested result, etc. based on the judgment result.

[0051] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) systems. th Generation, 6G) communication system.

[0052] FIG1 is a block diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device (Wearable Device), an aircraft (Flight Vehicle), a vehicle-mounted device (VUE), a ship-mounted device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), a game console, a personal computer (PC), an ATM, or a self-service machine, or other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be called a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (Wireless Local Area Network, WLAN) access point (Access Point, AP) or a wireless fidelity (Wireless Fidelity, WiFi) node, etc.Among them, the base station can be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home Evolved Node B (home evolved Node B), Transmission Reception Point (TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0053] The following describes in detail the downlink reference signal transmission method, apparatus, terminal, and network-side equipment provided in the embodiments of the present application through some embodiments and their application scenarios in conjunction with the accompanying drawings.

[0054] FIG2 is a flowchart of a method for transmitting a downlink reference signal according to an embodiment of the present application. The method is applied to a terminal. As shown in FIG2 , the method includes steps 201 to 203.

[0055] Step 201: The terminal receives a downlink reference signal sent by a network-side device via frequency hopping transmission.

[0056] Optionally, the network-side device transmits a downlink reference signal via multiple hops in frequency hopping transmission. The downlink reference signal is used to measure channel state information (CSI). The downlink reference signal may include but is not limited to a channel state information reference signal (CSI-RS).

[0057] Step 202: The terminal processes downlink reference signals of multiple hops in the frequency hopping transmission to obtain a jointly processed channel state information measurement result and / or a non-jointly processed channel state information measurement result.

[0058] Optionally, the jointly processed channel state information measurement result refers to the channel state information measurement result obtained by jointly processing multiple hops. The non-jointly processed channel state information measurement result refers to the channel state information measurement result of each hop. Optionally, the implementation of joint processing may include: multiple hops form an equivalent large bandwidth, and the terminal obtains the CSI measurement result based on the CSI-RS of the equivalent large bandwidth. For example, the terminal can obtain wideband CSI based on the equivalent large bandwidth; or the terminal can obtain narrowband CSI after frequency domain compression (such as enhanced Type 2 (eType2) codebook feedback) based on the equivalent large bandwidth.

[0059] Step 203: The terminal reports a channel state information report to the network-side device, where the channel state information report includes the channel state information measurement result of the joint processing and / or the channel state information measurement result of the non-joint processing.

[0060] In an embodiment of the present application, a downlink reference signal sent by a network-side device through frequency hopping transmission is received by a terminal, and the downlink reference signals of multiple hops in the frequency hopping transmission are processed to obtain a jointly processed channel state information measurement result and / or a non-jointly processed channel state information measurement result, and then a channel state information report is reported to the network-side device. The channel state information report includes the jointly processed channel state information measurement result and / or the non-jointly processed channel state information measurement result, so that the terminal can process a large-bandwidth downlink reference signal, and the channel state information report overhead is small.

[0061] Optionally, multiple hops in the frequency hopping transmission are defined in the same downlink reference signal resource.

[0062] Taking the downlink reference signal as CSI-RS as an example, the network-side device transmits the CSI-RS via multiple hops in frequency hopping transmission. The terminal receives the CSI-RS transmitted by the network-side device via frequency hopping, wherein the multiple hops of the CSI-RS are configured within a CSI-RS resource. Figure 3 is a schematic diagram of multiple hops of the CSI-RS configured within a CSI-RS resource, as provided in an embodiment of the present application.

[0063] This embodiment introduces a CSI-RS frequency hopping method for a terminal to process large-bandwidth CSI-RS. The terminal processes CSI-RS by frequency hopping, performing joint CSI frequency-domain compression on CSI-RS from multiple hops, and obtaining a CSI report with low overhead.

[0064] Optionally, in the embodiment of the present application, the hop pattern of the frequency hopping transmission includes at least one of the following types:

[0065] Pattern 1: Staircase pattern. A staircase pattern may include at least one of the following:

[0066] 1) Non-wrapped staircase pattern, where the first hop is the hop with the lowest or highest frequency domain position among all hops; FIG4 is a schematic diagram of a non-wrapped staircase pattern provided in an embodiment of the present application.

[0067] 2) A wrapped staircase pattern, in which the first hop may not be the hop with the lowest or highest frequency domain position among all hops. FIG5 is a schematic diagram of a wrapped staircase pattern provided in an embodiment of the present application.

[0068] Pattern 2: Staggered pattern. FIG6 is a schematic diagram of a staggered pattern provided in an embodiment of the present application.

[0069] In the embodiment of the present application, the frequency hopping pattern actually used may be indicated by the network or agreed upon by a protocol.

[0070] Optionally, in an embodiment of the present application, a hop pattern of frequency hopping transmission may be determined based on at least one of the following hop parameters: a frequency hopping frequency domain related parameter; a frequency hopping time domain related parameter; or a time-frequency mapping related parameter.

[0071] Here, each hop parameter is described as follows:

[0072] (1) Frequency hopping frequency domain related parameters, including at least one of the hop number, hop bandwidth, overlapping bandwidth between adjacent hops in the frequency domain, hop starting physical resource block (PRB), and total hop bandwidth.

[0073] Optionally, the value of the hop number is N, where N is a positive integer;

[0074] Optionally, the hop bandwidths of multiple hops in the frequency hopping transmission are the same, or the hop bandwidths of the multiple hops may be different. For example, among multiple hops, the bandwidth of the hop with the lowest and / or highest frequency domain position is different from the bandwidths of other hops, while the bandwidths of the other hops are the same. Optionally, the same hop bandwidth of the multiple hops / the hop bandwidth of the first hop may reuse the 'nrofRBs' parameter in the CSI-RS resource parameter.

[0075] Optionally, the overlap bandwidth between adjacent hops in the frequency domain, or the overlap bandwidth between adjacent hops in the frequency domain, can be different. For example, the overlap bandwidth between the highest hop in the frequency domain and its adjacent hop, and / or the overlap bandwidth between the lowest hop in the frequency domain and its adjacent hop, can be different from the other overlap bandwidths, while the other overlap bandwidths are the same. Optionally, the overlap bandwidth can be configured as 0. Optionally, when the overlap bandwidth between adjacent hops in the frequency domain is not configured, it is assumed that there is no overlap between the hops.

[0076] Optionally, the total hop bandwidth represents the total bandwidth of multiple hop frequencies in the frequency hopping transmission. Optionally, the total hop bandwidth does not exceed the bandwidth of a partial bandwidth (Bandwidth Part, BWP) or a 'virtual BWP'. Optionally, the total hop bandwidth can reuse 'nrofRBs' in the CSI-RS resource parameter.

[0077] Optionally, the hop start PRB is a PRB offset relative to a frequency domain reference point, where the frequency domain reference point can be at least one of a reference point A, a BWP starting point, a separately defined frequency hopping reference point (frequency hopping point A), a CSI-RS resource frequency domain starting point, or other defined reference points.

[0078] Optionally, the hop start PRB is determined based on at least one of the following:

[0079] 1) The hop start PRB of each hop is configured separately;

[0080] 2) The hop starting PRB of each hop is determined based on at least one of the configured starting PRB of the first hop in the time domain and / or the lowest hop in the frequency domain, the hop bandwidth, and the overlapping bandwidth between adjacent hops in the frequency domain. That is, the starting PRB of each hop can be calculated based on the configured starting PRB of the first hop in the time domain and / or the lowest hop in the frequency domain, combined with the hop bandwidth and the hop overlapping bandwidth. The starting PRB of the first hop in the time domain and / or the lowest hop in the frequency domain can be configured by the network. Optionally, the starting PRB of the first hop in the time domain and / or the lowest hop in the frequency domain can reuse the 'startingRB' in the existing CSI-RS resource parameters.

[0081] Optionally, the starting PRB of the hop with the lowest frequency domain position may also be called a starting PRB or offset of frequency hopping.

[0082] (2) Frequency hopping time domain related parameters, including at least one of the starting slot offset of the hop, the first symbol of the downlink reference signal within the hop, and the period of the hop, or including at least one of the starting slot offset of the downlink reference signal resource, N starting symbols of the downlink reference signal resource, and the number of starting symbols occupied by one hop; N is a positive integer.

[0083] Optionally, the frequency hopping time domain related parameters can be configured in the following two ways:

[0084] Parameter configuration method 1: Configure hop-level frequency hopping time domain related parameters. The frequency hopping time domain related parameters may include at least one of the starting time slot offset of the hop, the starting symbol of the downlink reference signal within the hop, and the hop period.

[0085] Optionally, the start timeslot offset of the hop is determined according to one of the following methods:

[0086] 1) The starting timeslot offset of each hop is configured separately;

[0087] 2) Configure the starting slot offset of the first hop, and the starting slot offsets of subsequent hops are relative slot offsets with respect to the starting slot of the first hop. Optionally, the relative slot offset can be configured by the network or agreed upon by the protocol. Optionally, if multiple slots are consecutive, the default slot offset is 1. Optionally, the starting slot offset of the first hop in the time domain can reuse the 'slot offset' in the existing CSI-RS resource parameters. Optionally, the relative slot offset is a regular slot offset or an available slot offset.

[0088] Optionally, the starting time slot offset of the hop is not limited to the time slot offset corresponding to periodic CSI-RS, semi-persistent CSI-RS, and aperiodic CSI-RS. Optionally, for aperiodic CSI-RS, a trigger offset corresponding to each hop is configured; or, a trigger offset corresponding to the first hop is configured, and the positions of other hops are determined based on the offset from the first hop.

[0089] Optionally, the starting timeslot offset of each hop is the same, indicating that multiple hops are configured in one timeslot, only intra-slot hopping is supported, and only one starting timeslot offset can be configured.

[0090] Optionally, the starting symbol of the downlink reference signal within the hop, such as the starting symbol of the CSI-RS within the hop. Multiple starting symbols within the hop are used to map different code division multiplexing (CDM) groups corresponding to the CSI-RS port in the time domain. Optionally, the starting symbol of each hop is independently configured. Optionally, at least one starting symbol can be configured for each hop.

[0091] Optionally, if the periods of multiple hops are the same, the period of CSI-RS resources may be reused.

[0092] Parameter configuration method 2: Only configure resource-level frequency hopping time domain related parameters. The frequency hopping time domain parameters may include at least one of the following: at least one starting time slot offset of a downlink reference signal resource, N starting symbols of a downlink reference signal resource, and the number of starting symbols occupied by a hop; N is a positive integer.

[0093] Optionally, the time domain position of each hop is determined according to the number of starting symbols occupied by each hop.

[0094] Optionally, at least one starting time slot offset of a downlink reference signal resource, for example, at least one starting time slot offset of a CSI-RS resource.

[0095] Optionally, at least one starting time slot offset of the CSI-RS resource is determined according to one of the following methods:

[0096] Method 1: Each starting time slot offset is configured separately

[0097] Method 2: Configure the first starting slot offset, and all subsequent starting slot offsets are relative slot offsets relative to the first starting slot. Optionally, the relative slot offset can be configured by the network or agreed upon by the protocol. Optionally, if multiple slots are consecutive, the default slot offset is 1. Optionally, the first starting slot offset can reuse the 'slot offset' parameter in the existing CSI-RS resource parameters.

[0098] Optionally, the relative slot offset is a regular slot offset or an available slot offset. Optionally, the slot offset is not limited to the slot offset corresponding to periodic CSI-RS, semi-persistent CSI-RS, and aperiodic CSI-RS.

[0099] Optionally, the CSI-RS resource may include only one starting slot offset, indicating that only intra-slot hopping is supported, and multiple hops occur within one slot; or, transmission of multiple slots is determined based on symbol-level offsets across slots.

[0100] Optionally, N starting symbols of a downlink reference signal resource, such as N starting symbols of a CSI-RS resource, where N >= 1. The N first symbols may be in one slot or span multiple slots. A first symbol corresponds to the same time domain starting position for a group of CDM groups. Optionally, the indexes of the N starting symbols are 0, 1, ..., N-1.

[0101] Optionally, the N starting symbols of the CSI-RS resource may be determined by one of the following methods:

[0102] Method 1: Each slot is independently configured with at least one first symbol, with the symbol index relative to the starting slot. Multiple slots are determined by the starting slot offset described above. Optionally, the number of first symbols in different slots is the same; optionally, the first symbols in different slots are located at the same position.

[0103] Method 2: The N first symbols are configured with a relative symbol offset (symbol offset) based on the slot starting point or the first first symbol in the starting slot of the CSI-RS resource. Optionally, the symbol offset can cross slot boundaries.

[0104] Optionally, the number of starting symbols occupied by a hop can be used to assist in mapping different CDM groups corresponding to the CSI-RS port in the time domain.

[0105] Optionally, the number of starting symbols occupied by a hop can be determined by one of the following methods:

[0106] Method 1: The network configures the number of starting symbols occupied by a hop.

[0107] Method 2: Determine the number of first symbols occupied by a hop based on a mapping relationship (or mapping table) consisting of at least one of the number of ports, frequency domain density, CDM type, CDM group index, and CSI-RS position in the slot. For example, if the network is configured with a number of first symbols of 2, but a mapping table consisting of at least one of the number of ports, frequency domain density, CDM type, CDM group index, and CSI-RS position in the slot determines that all ports will occupy one first symbol, then one hop occupies one first symbol, and the number of hops is 2. Alternatively, the number of first symbols occupied by a hop is determined based on the number of first symbols occupied by a complete set of ports, for example, if the two are equal.

[0108] Optionally, the number of first symbols configured in the network is greater than the number of first symbols used for all port mappings at one time; or, the number of first symbols configured in the network is an integer multiple of the number of first symbols used for all port mappings at one time.

[0109] Method 3: Determine based on the total number of starting symbols or the number of hops. For example, the number of first symbols occupied by a hop is equal to the total number of starting symbols divided by the number of hops.

[0110] Optionally, if the number of first symbols in a CSI-RS period is insufficient to support a complete round of frequency hopping (i.e., N hops), different hops may span the CSI-RS period; or, the actual number of frequency hopping is the number of hops that can be transmitted in a period, which may be less than N.

[0111] When different hops can span CSI-RS cycles, the number of hops within a cycle is divisible by the total number of hops, N. For example, if a cycle can transmit 1 hop, and the total number of hops is N, then a complete frequency hopping cycle is transmitted over N cycles; if a cycle can transmit 2 hops, and the total number of hops is N, then a complete frequency hopping cycle is transmitted over N / 2 cycles; if a cycle can transmit Y hops, and the total number of hops is N, then a complete frequency hopping cycle is transmitted over N / Y cycles. Alternatively, if the number of first symbols occupied by a hop is equal to the number of first symbols of the CSI-RS resource, different hops are distinguished by different CSI-RS resource periods.

[0112] (3) Time-frequency mapping related parameters, including at least one of a hop time domain index, a hop frequency domain index (hop frequency index) and a hop direction factor.

[0113] Optionally, a hop time index, also called a hop index or a hop time index counter, indicates the index of different hops in the time domain. For example, the first hop in the time domain has a hop index of 0, while the last hop in the time domain has a hop index of N-1.

[0114] Optionally, the hop time domain index can be determined by one of the following methods:

[0115] Method 1: Each hop is configured with a corresponding hop time domain index. Optionally, each hop is configured with a corresponding starting slot and first symbol, and associated with the corresponding hop time domain index.

[0116] Method 2: Determine the hop time domain index based on the time domain order of the starting slot and first symbol of different hops. For example, the hop at the front of the time domain order has a time domain index of 0.

[0117] Method 3: Determine the hop time domain index according to the indices of the N first symbols of the CSI-RS resource and the number of first symbols occupied by a hop.

[0118] For example, the hop time domain index is calculated using the following formula (1):

[0119] in, is the hop time domain index, is the index of the first symbol, and X is the number of first symbols occupied by one hop.

[0120] Optionally, the hop frequency domain index of the first hop and / or the remaining hops represents the frequency domain index of the hop. Based on the hop frequency domain index of the first hop and / or the remaining hops, the starting PRB of the first hop and / or the remaining hops can be determined. For example, for the first hop in the frequency domain, the hop frequency domain index = 0; the maximum hop frequency domain index = N-1.

[0121] Optionally, the hop frequency domain index of each hop may be determined by one of the following methods:

[0122] Method 1: Configure corresponding hop frequency domain indexes for all hops.

[0123] Method 2: The protocol specifies the hop frequency domain indexes corresponding to all hops.

[0124] Method 3: Determine the hop frequency domain indexes of the remaining hops based on the hop frequency domain index corresponding to the first hop in the time domain and the hop index.

[0125] For example, for the wrapped staircase pattern, the following formula (2-1) is used to calculate the hop frequency domain index of the remaining hops:

[0126] in, is the hop frequency domain index of each hop, The hop index of each hop, The hop frequency domain index or hop frequency domain index offset of the first hop, N hop The frequency hopping direction factor corresponding to the above formula (2-1) is '+'.

[0127] If the frequency hopping direction factor is '-', the following formula (2-2) is used to calculate the hop frequency domain index of the remaining hops:

[0128] For example, for the staggered pattern, the following formula (3-1) is used to calculate the hop frequency domain index of the remaining hops:

[0129] in, is the hop frequency domain index of each hop, The hop index of each hop, The hop frequency domain index or hop frequency domain index offset of the first hop, N hop is the hop number; the frequency hopping direction factor corresponding to the above formula (3-1) is '+'.

[0130] If the frequency hopping direction factor is '-', the following formula (3-2) is used to calculate the hop frequency domain index of the remaining hops:

[0131] Optionally, the hop frequency domain index or hop frequency domain index offset corresponding to the first hop can be determined by formula (4) or configured by the network.

[0132] in, The hop frequency domain index or hop frequency domain index offset of the first hop. is the starting PRB of the first hop, is the hop bandwidth, is the hop overlap bandwidth. Optionally, if the hop overlap bandwidth is 0, then

[0133] Optionally, the hop frequency domain index corresponding to the first hop may be configured by the network, or determined according to a formula, or agreed upon by a protocol;

[0134] Optionally, for a non-wrapped staircase pattern, the first hop corresponds to a hop frequency domain index = 0 or the first hop corresponds to a hop frequency domain index = N hop -1. The frequency domain indexes of the remaining hops are incremented or decremented in sequence. Optionally, the frequency domain index of the first hop is incremented or decremented, and the first hop frequency domain index = 0 or N hop -1 depends on the frequency hopping direction factor.

[0135] Method 4: Determine the hop frequency domain index of each hop based on the hop frequency domain index corresponding to the first hop in the time domain and the relative frequency domain indexes of the remaining hops relative to the first hop as agreed in the network configuration / protocol.

[0136] Optionally, the default relative frequency domain index corresponding to the first hop in the time domain is 0. The relative frequency domain indexes are {0, 2, 3, 1}, which respectively represent the relative frequency domain indexes from the first hop to the Nth hop in the time domain.

[0137] Optionally, the starting PRB position of each hop is determined according to the hop frequency domain index.

[0138] For example, the following formula (5) is used to calculate the offset of the starting PRB of each hop relative to the starting PRB of the lowest hop in the frequency domain:

[0139] in, is the offset of the starting PRB with the lowest hop relative to the frequency domain position, is the hop frequency domain index of each hop, is the hop bandwidth, is the hop overlap bandwidth, is the number of subcarriers in an RB.

[0140] Alternatively, the offset of the starting PRB of each hop relative to the starting PRB of the hop with a hop index of 0 is calculated using the following formula.

[0141] Optionally, the hop direction factor indicates whether the frequency domain of the subsequent hop is higher or lower than that of the previous hop.

[0142] It should be noted that the hop parameter in the embodiment of the present application may include at least one of the following: a network configuration parameter; an intermediate parameter generated in the process of determining the hop pattern; a parameter agreed upon by the protocol.

[0143] Optionally, in the embodiment of the present application, the frequency hopping transmission satisfies at least one of the following:

[0144] 1. The lowest and / or highest hop boundaries in the frequency domain position in the frequency hopping transmission are aligned with the boundaries of a specific frequency domain range, wherein the specific frequency domain range includes at least one of an active partial bandwidth (active BWP), a virtual BWP, a carrier, a hop total bandwidth boundary, or another specific frequency domain range.

[0145] The lowest and / or highest hop boundary of the frequency domain position in the frequency hopping transmission is aligned with a specific frequency domain range boundary, including at least one of the following:

[0146] a. If the frequency domain position of the lowest and / or highest hop determined according to the hop bandwidth exceeds the specific frequency domain range, the resources in the hop that exceed the specific frequency domain range are not used to send the downlink reference signal;

[0147] b. If the frequency domain position of the lowest and / or highest hop determined according to the hop bandwidth and the same hop overlapping bandwidth exceeds the specific frequency domain range, adjusting at least one of the starting PRB of the hop and the overlapping bandwidth of the hop and the hop adjacent to the frequency domain, allowing the overlapping bandwidth of the hop adjacent to the hop frequency to be larger than the overlapping bandwidth between other hops, so that the frequency domain position of the hop falls within the specific frequency domain range and is aligned with the specific frequency domain range boundary.

[0148] 2. Each hop boundary in the frequency hopping transmission is aligned with a subband boundary.

[0149] The alignment of each hop boundary with a subband boundary in the frequency hopping transmission includes at least one of the following:

[0150] a. The starting PRB of each hop is aligned with the starting PRB of the subband;

[0151] b. The end PRB of each hop is aligned with the end PRB of the subband;

[0152] c. The overlapping bandwidth between adjacent hops in the frequency domain is an integer multiple of the sub-band;

[0153] d. The bandwidth of each hop is an integer multiple of the sub-band.

[0154] In one implementation, each hop boundary is aligned with a subband boundary, and a or b is selected, that is, only the start or end PRB is restricted to be aligned with the subband boundary;

[0155] In one implementation, each hop boundary is aligned with a subband boundary. Selecting a, b, c, and d completely limits the hop frequency domain range to be aligned with the subband.

[0156] The hop boundary is aligned with the subband boundary, which can minimize the overlap between the subband and the two hops and reduce the complexity of subband CSI reporting.

[0157] 3. Among the hop parameters of different downlink reference signal resources in a resource set, other hop parameters except the hop time domain position are consistent.

[0158] For example, for different CSI-RS resources within a resource set, except for the hop time domain position, other hopping parameters (such as hop number, hop pattern, hop bandwidth, total hop bandwidth, hop overlap bandwidth, etc.) are consistent.

[0159] Optionally, within the frequency domain range corresponding to a certain hop, if two CSI-RS resources are adjacent in the time domain and resource 1 is before resource 2, the terminal does not expect the start time of the next hop of resource 1 to conflict with the end time of the current hop of resource 2.

[0160] 4. The terminal does not expect the interval between adjacent hops in the time domain to exceed a first switching time; the first switching time is determined by at least one of a network instruction, a protocol agreement, or a terminal capability.

[0161] 5. The terminal does not expect the downlink reference signal within a hop to cross the time slot boundary. For example, the terminal does not expect the CSI-RS within a hop to cross the slot boundary.

[0162] 6. The terminal does not expect the hop bandwidth to exceed the maximum bandwidth supported by the terminal.

[0163] 7. The same port on different hops uses the same sequence during sequence mapping; that is, the same scrambling code ID, slot index, and symbol index.

[0164] 8. Each hop in the frequency hopping transmission maps all downlink reference signal ports. For example, for any hop, the complete CSI-RS port must be mapped.

[0165] Optionally, considering flexibility, the first parameter in the hop parameter is carried by at least one of the following messages:

[0166] 1) Medium Access Control (MAC) Control Element (CE);

[0167] 2) Downlink Control Information (DCI).

[0168] The second parameter in the hop parameter is configured by high-layer signaling and / or agreed upon by a protocol.

[0169] For example, the first parameter includes a hop frequency domain index of the first hop in the frequency hopping transmission.

[0170] Optionally, at least one of the following parameters of different hops in the frequency hopping transmission is the same (these parameters are configured according to the CSI-RS resource level (per CSI-RS resource), not according to the hop level (per hop):

[0171] 1) Downlink reference signal resource identifier; for example, CSI-RS resource ID.

[0172] 2) Power control offset; for example, powerControlOffset or powerControlOffsetSS. In other words, the transmit power of different hops is the same.

[0173] 3) Scrambling code identification; for example, scramblingID.

[0174] 4) Quasi-co-site QCL parameters; for example, qcl-InfoPeriodicCSI-RS.

[0175] 5) Frequency domain allocation parameters within a resource block (RB); for example, frequencyDomainAllocation.

[0176] 6) The number of downlink reference signal ports included in the hop, for example, nrofPorts. This refers to the total number of CSI-RS ports included in a hop.

[0177] 7) Port index included in the hop; that is, each hop includes all CSI-RS ports, and ports with the same port index in different hops belong to the same port.

[0178] 8) Code Division Multiplexing (CDM) type; for example, cdm-Type.

[0179] 9) CDM group size. The CDM group size is the number of ports contained in a CDM group.

[0180] 10) CDM group index; that is, CDM groups with the same CDM group index in different hops belong to the same CDM group.

[0181] 11) Frequency domain density.

[0182] Optionally, in the process of the terminal receiving a downlink reference signal sent by a network-side device through frequency hopping transmission, the reception by the terminal satisfies any one of the following:

[0183] 1. The terminal ignores or does not receive hops outside the active BWP range.

[0184] That is, the terminal only receives hops within the active BWP range. Correspondingly, the terminal does not expect to receive hops outside the active BWP range, or the terminal does not expect frequency hopping to be configured outside the active BWP.

[0185] For example, for a hop, if The terminal shall assume that the initial CRB index of the CSI-RS resource is Otherwise N initialRB =startingRB.

[0186] if The terminal should assume that the bandwidth of the CSI-RS resource is otherwise

[0187] Among them, startingRB is the starting PRB position of the hop configured by the network, nrofRBs is the hop bandwidth configured by the network, It is the starting point of active BWP. is the active BWP size, N initialRB is the initial CRB index of the hop, is the actual bandwidth of the hop.

[0188] 2. The terminal receives a hop outside the active BWP range.

[0189] Optionally, when a target condition is met, the terminal receives a hop outside the active BWP range, wherein the target condition includes at least one of the following:

[0190] 1) Network configuration enabling condition, used to enable the terminal to receive hops outside the active BWP range.

[0191] 2) The network configures the hop of the downlink reference signal; for example, the network configures CSI-RS frequency hopping.

[0192] 3) Network configuration measurement gap (MG);

[0193] 4) Network configuration virtual BWP.

[0194] Optionally, the implementation manner in which the terminal receives a hop outside the active BWP range may include at least one of the following:

[0195] Mode 1: The terminal ignores the restriction of the frequency domain range of the hop of the downlink reference signal by the active BWP.

[0196] Mode 2: The network configures the MG, and the terminal receives or measures multiple hops in the frequency hopping transmission in the MG.

[0197] Method 3: The network configures a virtual BWP or virtual broadband, and the terminal receives or measures multiple hops in the frequency hopping transmission within the virtual BWP.

[0198] The virtual BWP satisfies at least one of the following:

[0199] 1) The bandwidth of the virtual BWP is greater than the maximum bandwidth supported by the terminal.

[0200] 2) At the same time (such as the same OFDM symbol), the bandwidth received or processed by the terminal in the virtual BWP does not exceed the maximum bandwidth supported by the terminal.

[0201] 3) The bandwidth of the virtual BWP does not exceed the maximum hop total bandwidth of the joint processing supported by the terminal.

[0202] 4) The bandwidth of the virtual BWP does not exceed the carrier bandwidth.

[0203] 5) The bandwidth range of the virtual BWP includes the total hop bandwidth, or the bandwidth range of the virtual BWP is consistent with the total hop bandwidth, or the bandwidth range of the virtual BWP does not exceed the total hop bandwidth configured by the network.

[0204] If CSI-RS frequency hopping is configured at the terminal level, the virtual BWP bandwidth includes the total hop bandwidth or is consistent with the total hop bandwidth range.

[0205] If CSI-RS frequency hopping is not configured at the terminal level, the virtual BWP bandwidth may not exceed the total hop bandwidth, and the terminal can only process hops within the virtual BWP bandwidth.

[0206] 6) The terminal only processes the downlink reference signal on the virtual BWP.

[0207] 7) The parameter set of the virtual BWP is the same as that of the downlink reference signal.

[0208] 8) The frequency domain position reference point of the virtual BWP is the starting point of the carrier or Point A.

[0209] Optionally, the virtual BWP may also be expressed as a 'virtual wideband', which is used to receive a downlink reference signal hop outside the active BWP.

[0210] Optionally, when the terminal receives a hop outside the active BWP range or a network configures a virtual BWP, the terminal satisfies at least one of the following:

[0211] 1) The terminal ignores the BWP ID included in the downlink reference signal configuration;

[0212] 2) The terminal does not expect the downlink reference signal configuration to include a BWP ID;

[0213] 3) The BWP ID included in the downlink reference signal configuration received by the terminal is used to indicate the virtual BWP.

[0214] Optionally, for activation / deactivation of the semi-persistent downlink reference signal, the terminal does not expect the activation / deactivation message to contain a BWP identifier; or, the terminal ignores the activation / deactivation message containing the BWP identifier; or, the BWP ID in the activation / deactivation message received by the terminal is used to indicate a 'virtual BWP'; or, the field in the activation / deactivation message received by the terminal needs to include a field indicating a 'virtual BWP'.

[0215] Optionally, the virtual BWP is configured in a channel state information report configuration, or in a downlink positioning reference signal configuration.

[0216] Optionally, the terminal receives hops within a frequency domain range of the virtual BWP.

[0217] For example, for a hop, if The terminal shall assume that the initial CRB index of the CSI-RS resource is Otherwise N initialRB =startingRB.

[0218] if The terminal should assume that the bandwidth of the CSI-RS resource is otherwise

[0219] Among them, startingRB is the starting PRB position of the hop configured by the network, nrofRBs is the hop bandwidth configured by the network, It is the starting point of the virtual BWP. is the virtual BWP size, N initialRB is the initial CRB index of the hop, is the actual bandwidth of the hop.

[0220] Optionally, the terminal switches to the active BWP after measuring all hops in the frequency hopping transmission.

[0221] Optionally, when the interval between adjacent hops in the time domain is greater than a second switching time, the terminal switches to the active BWP between the adjacent hops in the time domain. For example, the second switching time is equal to twice the switching time between the frequency hopping and the active BWP.

[0222] Optionally, the terminal processes the downlink reference signals of multiple hops in the frequency hopping transmission to obtain a jointly processed channel state information measurement result and / or a non-jointly processed channel state information measurement result; the terminal reports a channel state information report, where the channel state information report includes the jointly processed channel state information measurement result and / or the non-jointly processed channel state information measurement result. For example, the terminal reports a single-hop CSI measurement result and / or a multi-hop jointly estimated CSI measurement result based on CSI-RS measurement.

[0223] Optionally, the channel state information CSI report includes at least one of the following:

[0224] 1. A first measurement result, where the first measurement result includes: a channel state information measurement result of each of X hops in the frequency hopping transmission or a channel state information measurement result of each of all hops in the frequency hopping transmission; X is a positive integer.

[0225] The first measurement result, such as a single-hop CSI measurement result, may be one of the following:

[0226] 1) Measurement results of each of X hops in the plurality of hops; X may be determined by at least one of network configuration, protocol agreement, or terminal selection. For example, X is the number of hops actually measured or processed by the terminal.

[0227] 2) The measurement results of each hop of multiple hops. For example, when reporting, the terminal needs to process all hops before reporting.

[0228] Optionally, when the terminal reports the wideband CSI measurement result, the wideband corresponds to the hop; or when the terminal reports the subband CSI measurement result, the subband CSI measurement result is obtained by the terminal without joint processing / compression of multiple hops.

[0229] 2. First indication information, where the first indication information is used to indicate that the first measurement result is a single-hop channel state information measurement result.

[0230] The terminal carries first indication information in the channel state information report, where the first indication information is used to indicate that the first measurement result corresponds to single-hop.

[0231] 3. First frequency hopping information, where the first frequency hopping information is used to indicate hop information associated with the first measurement result.

[0232] The terminal reports hop information associated with the first measurement result, where the hop is at least one hop actually processed by the terminal. The hop information includes at least one of the following information of the at least one hop: a hop index; a hop frequency index; and a hop frequency domain range.

[0233] 4. A second measurement result, where the second measurement result includes: a channel state information measurement result of Y hops jointly processed in the frequency hopping transmission or a channel state information measurement result of all hops jointly processed in the frequency hopping transmission; Y is a positive integer.

[0234] The second measurement result, such as a CSI measurement result of multi-hop joint estimation, may be one of the following:

[0235] 1) Jointly estimated measurement results for Y hops among multiple hops; Y may be determined by at least one of network configuration, protocol agreement, or terminal selection. For example, Y is the number of hops actually measured or processed by the terminal. If the terminal has not processed all hops at the time of reporting, it may only report the measurement results of the hops that it has processed.

[0236] For example, before a CSI reference resource (CSI reference resource), the terminal can only complete the measurement or processing of a part of the hops, and the terminal may only report the measurement results of the processed hops.

[0237] 2) The measurement results of all hops in multiple hops are jointly estimated. For example, when reporting, the terminal needs to process all hops before reporting.

[0238] Optionally, the terminal reports a wideband CSI measurement result, where the wideband corresponds to multiple hops; or, the terminal reports a subband CSI measurement result, where the subband CSI measurement result is obtained by frequency domain compression performed by the terminal in conjunction with multiple hops.

[0239] 5. Second indication information, where the second indication information is used to indicate that the second measurement result is a channel state information measurement result of multi-hop joint processing.

[0240] The terminal indicates, through the second indication information in the channel state information report, that the first measurement result corresponds to multiple hop.

[0241] 6. Second frequency hopping information, where the second frequency hopping information is used to indicate hop information associated with the second measurement result.

[0242] The terminal reports hop information associated with the second measurement result, where the hop is at least one hop actually processed by the terminal. The hop information includes at least one of the following information about the at least one hop: hop number; hop index; hop frequency index; and hop frequency domain range.

[0243] Optionally, before reporting the channel state information report, the terminal receives a network instruction, and the network instruction reports in one of single hop, multiple hop, or single hop + multiple hop. Wherein, single hop + multiple hop means that the terminal reports two measurement results simultaneously, that is, the first measurement result and the second measurement result are reported simultaneously.

[0244] Optionally, the hop information to be measured is indicated in the network indication, and the hop information includes at least one of the following information of at least one hop: hop number; hop index; hop frequency index; hop frequency domain range.

[0245] For example, after the terminal receives the hop configuration, the network further flexibly indicates the hop information that needs to be measured, such as indicating it in a field indicated by the DCI or MAC CE.

[0246] For another example, in the indication field of the aperiodic or semi-persistent CSI reporting, the hop information to be measured is further indicated, indicating the hop information to be measured associated with this aperiodic or semi-persistent CSI reporting.

[0247] Optionally, the terminal receives reporting indication information sent by the network side device, and the reporting indication information is used to instruct the terminal to jointly process downlink reference signals of multiple hops. Further, the network side device can instruct the terminal to process the CSI-RS bandwidth and / or at least one hop index. Optionally, the implementation method of the terminal reporting the channel state information report to the network side device may include:

[0248] In a case where at least one port of one or more target hops of the frequency hopping transmission is discarded, the terminal reports the channel state information report to the network side device in a target manner;

[0249] The target method is at least one of the following:

[0250] Method 1: Ignore the measurement and / or reporting of the channel state information this time.

[0251] Mode 2: Ignore the measurement and / or reporting of all ports of the target hop.

[0252] All ports of the target hop are not considered. For example, the current channel state information report is ignored, or the current channel state information report is obtained based on the hop with complete ports.

[0253] For example, if the current channel state information report includes a wideband CSI report, the current wideband CSI report is ignored, or the wideband CSI report of the hop actually used is reported.

[0254] Alternatively, if the current channel state information report includes subband CSI reporting, the current subband CSI reporting is ignored, or the subband CSI of the hop actually used is reported.

[0255] Mode 3: Consider the measurement and / or reporting of the ports where the target hop is not discarded.

[0256] In the case of considering the measurement and / or reporting of the port where the target hop is not discarded, the channel state information report includes at least one of the following:

[0257] 1) Wideband channel state information measurement results obtained based on multiple hops with complete ports in frequency hopping transmission.

[0258] 2) Sub-band channel state information measurement results obtained based on multiple hops with complete ports in frequency hopping transmission.

[0259] 3) A sub-band channel state information measurement result corresponding to a hop in which at least some ports are discarded in frequency hopping transmission is obtained.

[0260] 4) Wideband channel state information measurement results obtained based on the complete ports in all hops of frequency hopping transmission.

[0261] 5) Sub-band channel state information measurement results obtained based on the complete ports in all hops of frequency hopping transmission.

[0262] According to 4) or 5), in one embodiment, the network is configured with four hops, each with eight ports. If four ports of one hop are dropped, the terminal reports the broadband or subband channel state information measurement results of the remaining four ports of the four hops.

[0263] Optionally, the terminal performs downlink reference signal measurement and / or reports channel state information measurement results based on at least one set of subband configurations, wherein the set of subband configurations includes at least one of a subband start point, a subband end point, a subband bitmap, and a subband size.

[0264] For example, the terminal measures and reports CSI in the frequency domain according to wideband or subband configuration according to at least one group of subbands.

[0265] At least one of the starting point of the subband, the end point of the subband, and the bitmap of the subband in the subband configuration is determined according to the target frequency domain range; wherein the target frequency domain range includes the entire hop frequency domain range of the active BWP, virtual BWP, carrier, downlink reference signal frequency hopping, and at least one item in each hop frequency domain range.

[0266] Optionally, the first subband size can be smaller than other subband sizes to align with the first PRB of the target frequency domain range. For example, the first subband size is in is the subband size, is the starting PRB of the target frequency domain range.

[0267] The last subband size can be smaller than other subband sizes to align with the last PRB of the target frequency domain range.

[0268] For example, the last subband size is:

[0269] like Then the last subband size is in is the subband size, is the starting PRB of the target frequency domain range, The size of the target frequency domain range.

[0270] like Then the last subband size is

[0271] Optionally, the size of the subband in the subband configuration is mapped based on the target bandwidth; or, the size of the subband in the subband configuration is indicated by the network device from at least one candidate value, and the at least one candidate value is mapped based on the target bandwidth; wherein the target bandwidth includes at least one of a bandwidth consistent with the target frequency domain range, a hop bandwidth, a hop bandwidth with the smallest bandwidth, a hop bandwidth with the largest bandwidth, and a bandwidth indicated by the network device. For example, a subband is configured for each hop.

[0272] Optionally, the subband start point, end point, and bitmap are determined according to a frequency domain range with a larger bandwidth (such as one of other target frequency domain ranges in the target frequency domain range except each hop frequency domain range), and the subband size is determined according to the hop bandwidth.

[0273] Optionally, the subband configuration satisfies: when there is no overlapping bandwidth between adjacent hops in the frequency domain, the terminal does not expect one subband to include multiple hops.

[0274] Optionally, each hop is associated with or configured with a group of subband configurations, or multiple hops are associated with or configured with the same subband configuration.

[0275] Optionally, the subband configuration can have one or more groups, specifically,

[0276] 1) The subband configuration is grouped as 1, that is, CSI is measured and reported through a group of subband configurations.

[0277] 2) Subband configuration is divided into multiple groups, that is, each hop is configured with a group of subband configuration.

[0278] For example, the subband's start point, end point, size, and bitmap are determined based on the frequency domain range of each CSI-RS hop. For a CSI measurement result of a certain hop, the terminal reports the CSI measurement result of the subband corresponding to the hop frequency domain range.

[0279] For another example, the start point, end point, size, and bitmap length of a subband are determined and consistent according to other frequency domain ranges (such as a virtual BWP), but multiple sets of subband bitmap contents are configured for different hops.

[0280] Optionally, the subband configuration is associated with a hop index. Optionally, if different hops are associated with different downlink reference signal resources or downlink reference signal resource sets, then the association of the subband configuration with a hop can also be understood as the association of the subband configuration with the corresponding downlink reference signal resource or downlink reference signal resource set. Specifically, the subband configuration can be associated with a downlink reference signal resource identifier or a downlink reference signal resource set identifier.

[0281] Optionally, if there is an overlap between adjacent hops in the frequency domain, the corresponding bit value of the subband where the overlap is located in the bitmap of the subband is '1'.

[0282] Optionally, the jointly processed channel state information measurement result includes: at least one of a jointly processed subband channel state information (subband CSI) measurement result and a jointly processed wideband channel state information (wideband CSI) measurement result. The jointly processed subband channel state information (subband CSI) measurement result is obtained by performing joint frequency domain compression after compensating for the phase offset between hops for multiple hops in the frequency hopping transmission. The jointly processed wideband channel state information (wideband CSI) measurement result is obtained by obtaining an equivalent wideband after compensating for the phase offset between hops for multiple hops in the frequency hopping transmission.

[0283] If a subband includes N hops, the subband CSI measurement result may include at least one of the following:

[0284] 1) N1 groups of channel state information measurement results, where the N1 groups of channel state information measurement results include channel state information measurement results of the N1 hops included in the subband; N1 is a positive integer.

[0285] N1 groups of channel state information measurement results, such as N1 groups of CSI measurement results, are associated with different hops. Further, the reported N1 groups of CSI measurement results are associated with at least one of a subband index, a hop index, a hop frequency index, and a hop frequency domain position.

[0286] Optionally, the CSI measurement result of group N1 is obtained by at least one of the following implementations:

[0287] Method 1: N1 hops without frequency domain overlap, obtaining N sets of results.

[0288] Method 2: N1 hops have frequency domain overlap, but the overlap bandwidth is small (for example, not exceeding a certain threshold), and N1 sets of results are obtained.

[0289] Method 3: N1 hops have frequency domain overlap. In addition to the overlap bandwidth, the subband also corresponds to N1 hops, obtaining N1 sets of results.

[0290] Method 4: N1 hops have frequency domain overlap, and the overlap bandwidth is completely aligned with the subband. N groups of results are reported.

[0291] 2) a set of channel state information measurement results, where the set of channel state information measurement results is jointly processed based on N1 hops included in the subband.

[0292] A set of channel state information measurement results, such as a set of CSI measurement results, is obtained based on the processing results of N hops. Further, associated hop information is reported in the set of CSI measurement results. The hop information includes at least one of a hop index, a hop frequency index, and a hop frequency domain position.

[0293] Optionally, a group of CSI measurement results is obtained by combining multiple hops after compensating for phase errors based on results of N hop processing.

[0294] Optionally, the set of CSI measurement results is obtained by at least one of the following implementations:

[0295] Method 1: N hops without frequency domain overlap, obtaining one set of results.

[0296] Method 2: N hops have frequency domain overlap, and one set of results is obtained.

[0297] Method 3: N hops have frequency domain overlap. In addition to the overlap bandwidth, this subband corresponds to only one hop, and one set of results is obtained.

[0298] Method 4: N hops have frequency domain overlap, and the overlap bandwidth is large (for example, not less than a certain threshold), and one set of results is obtained.

[0299] Method 5: N hops have frequency domain overlap, and the overlap bandwidth is completely aligned with the subband, obtaining one set of results.

[0300] Optionally, the subband contains one set of CSI results, which are estimated based on one hop. That is, if the subband has only a small overlap with a certain hop, the measurement result of the subband on that hop is ignored.

[0301] 3) third frequency hopping information, where the third frequency hopping information is used to indicate or represent hop information associated with the channel state information measurement result of the sub-band.

[0302] Optionally, the terminal reports terminal capability information to the network-side device, where the terminal capability information includes at least one of the following:

[0303] 1) the maximum wideband channel state information processing bandwidth processed by the terminal at the same time;

[0304] 2) Total hop bandwidth; for example, the maximum CSI joint processing bandwidth;

[0305] 3) Whether it supports processing downlink reference signals outside the active BWP;

[0306] 4) Whether downlink reference signal frequency hopping is supported;

[0307] 5) Whether cross-time slot frequency hopping of downlink reference signals is supported;

[0308] 6) Maximum number of hops;

[0309] 7) Maximum overlapping bandwidth;

[0310] 8) Maximum bandwidth of each hop;

[0311] 9) Switching time between adjacent hops

[0312] 10) Whether 'Virtual BWP' is supported.

[0313] FIG7 is a second flow chart of a method for transmitting a downlink reference signal according to an embodiment of the present application. The method is applied to a network-side device. As shown in FIG7 , the method includes steps 701 to 702.

[0314] Step 701: The network-side device sends a downlink reference signal to the terminal through frequency hopping transmission.

[0315] Optionally, the network-side device transmits a downlink reference signal via multiple hops in frequency hopping transmission. The downlink reference signal is used to measure channel state information (CSI). The downlink reference signal may include a channel state information reference signal (CSI-RS).

[0316] Step 702: The network side device receives a channel state information report reported by the terminal, where the channel state information report includes a jointly processed channel state information measurement result and / or a non-jointly processed channel state information measurement result obtained after the terminal processes the downlink reference signals of multiple hops in the frequency hopping transmission.

[0317] Optionally, the jointly processed channel state information measurement result refers to a channel state information measurement result obtained by the terminal jointly processing multiple hops, and the non-jointly processed channel state information measurement result refers to a channel state information measurement result of each hop by the terminal.

[0318] In an embodiment of the present application, a network-side device sends a downlink reference signal to a terminal through frequency hopping transmission, the terminal receives the downlink reference signal sent by the network-side device through frequency hopping transmission, processes the downlink reference signals of multiple hops in the frequency hopping transmission, obtains a jointly processed channel state information measurement result and / or a non-jointly processed channel state information measurement result, and then reports a channel state information report to the network-side device, where the channel state information report includes the jointly processed channel state information measurement result and / or the non-jointly processed channel state information measurement result, thereby enabling the terminal to process a large-bandwidth downlink reference signal with a small channel state information report overhead.

[0319] Optionally, multiple hops in the frequency hopping transmission are defined in the same downlink reference signal resource.

[0320] Optionally, the hop pattern of the frequency hopping transmission is determined based on at least one of the following hop parameters:

[0321] Frequency hopping frequency domain related parameters, including at least one of the hop number, hop bandwidth, overlapping bandwidth between adjacent hops in the frequency domain, hop starting physical resource block (PRB), and total hop bandwidth;

[0322] Frequency hopping time domain related parameters include at least one of the starting time slot offset of the hop, the starting symbol of the downlink reference signal within the hop, and the hop period, or include at least one of the starting time slot offset of the downlink reference signal resource, N starting symbols of the downlink reference signal resource, and the number of starting symbols occupied by one hop; N is a positive integer;

[0323] Time-frequency mapping related parameters include at least one of the hop time domain index, the hop frequency domain index, and the hop direction factor.

[0324] Optionally, the hop start PRB is determined based on at least one of the following:

[0325] The hop start PRB of each hop is configured separately;

[0326] The hop start PRB of each hop is determined according to the configured start PRB of the first hop in the time domain and / or the lowest hop in the frequency domain, the hop bandwidth, and the overlapping bandwidth between adjacent hops in the frequency domain.

[0327] Optionally, the frequency hopping transmission satisfies at least one of the following:

[0328] The lowest and / or highest hop boundary of the frequency domain position in the frequency hopping transmission is aligned with a specific frequency domain range boundary, where the specific frequency domain range includes at least one of an active BWP, a virtual BWP, a carrier, and a hop total bandwidth boundary;

[0329] Each hop boundary in the frequency hopping transmission is aligned with a subband boundary;

[0330] The hop parameters of different downlink reference signal resources within a resource group are consistent except for the hop time domain position.

[0331] The terminal does not expect the interval between adjacent hops in the time domain to exceed a first switching time; the first switching time is determined by at least one of a network instruction, a protocol agreement, or a terminal capability;

[0332] The terminal does not expect the downlink reference signal within a hop to cross the time slot boundary;

[0333] The terminal does not expect the hop bandwidth to exceed the maximum bandwidth supported by the terminal;

[0334] The same port on different hops uses the same sequence during sequence mapping;

[0335] Each hop in the frequency hopping transmission maps all downlink reference signal ports.

[0336] Optionally, the lowest and / or highest hop boundary in the frequency domain position in the frequency hopping transmission is aligned with a specific frequency domain range boundary, including at least one of the following:

[0337] If the frequency domain position of the lowest and / or highest hop exceeds the specific frequency domain range, the resources in the hop that exceed the specific frequency domain range are not used to send the downlink reference signal;

[0338] If the frequency domain position of the lowest and / or highest hop in the frequency domain exceeds the specific frequency domain range, at least one of the starting PRB of the hop and the overlapping bandwidth of the hop and the hop adjacent to the frequency domain is adjusted so that the frequency domain position of the hop falls within the specific frequency domain range.

[0339] Optionally, each hop boundary in the frequency hopping transmission is aligned with a subband boundary, including at least one of the following:

[0340] The starting PRB of each hop is aligned with the starting PRB of the subband;

[0341] The end PRB of each hop is aligned with the end PRB of the subband;

[0342] The overlapping bandwidth between adjacent hops in the frequency domain is an integer multiple of the sub-band;

[0343] The bandwidth of each hop is an integer multiple of the sub-band.

[0344] Optionally, at least one of the following parameters of different hops in the frequency hopping transmission is the same:

[0345] Downlink reference signal resource identifier;

[0346] Power control offset;

[0347] Scrambling code identification;

[0348] Quasi-co-sited QCL parameters;

[0349] Frequency domain allocation parameters within resource blocks (RBs);

[0350] The number of downlink reference signal ports included in the hop;

[0351] The port index included in the hop;

[0352] Code Division Multiplexing CDM type;

[0353] CDM group size;

[0354] CDM group index;

[0355] Frequency domain density.

[0356] Optionally, the first parameter in the hop parameter is carried by at least one of the following messages: a media access control MAC control element CE and downlink control information DCI;

[0357] The second parameter in the hop parameter is configured by high-layer signaling and / or agreed upon by a protocol.

[0358] Optionally, the channel state information report includes at least one of the following:

[0359] A first measurement result, where the first measurement result includes: a channel state information measurement result of each of X hops in the frequency hopping transmission or a channel state information measurement result of each of all hops in the frequency hopping transmission; X is a positive integer;

[0360] first indication information, where the first indication information is used to indicate that the first measurement result is a single-hop channel state information measurement result;

[0361] first frequency hopping information, where the first frequency hopping information is used to indicate hop information associated with the first measurement result;

[0362] A second measurement result, where the second measurement result includes: a channel state information measurement result of Y hops jointly processed in the frequency hopping transmission or a channel state information measurement result of all hops jointly processed in the frequency hopping transmission; Y is a positive integer;

[0363] second indication information, where the second indication information is used to indicate that the second measurement result is a channel state information measurement result of multi-hop joint processing;

[0364] Second frequency hopping information, where the second frequency hopping information is used to indicate hop information associated with the second measurement result.

[0365] Optionally, the channel state information report includes at least one of the following:

[0366] Wideband channel state information measurement results obtained based on multiple hops with complete ports in the frequency hopping transmission;

[0367] Subband channel state information measurement results obtained based on multiple hops with complete ports in the frequency hopping transmission;

[0368] A sub-band channel state information measurement result obtained based on the hop in which at least some ports are discarded in the frequency hopping transmission;

[0369] Wideband channel state information measurement results obtained based on complete ports in all hops of the frequency hopping transmission;

[0370] The sub-band channel state information measurement results are obtained based on the complete ports in all hops of the frequency hopping transmission.

[0371] Optionally, the network side device sends reporting indication information to the terminal, where the reporting indication information is used to instruct the terminal to jointly process downlink reference signals of multiple hops.

[0372] Optionally, the jointly processed channel state information measurement result includes: a jointly processed subband channel state information subband CSI measurement result, wherein the subband CSI measurement result is a result of frequency domain compression after compensating for phase offsets between multiple hops in the frequency hopping transmission.

[0373] Optionally, the subband CSI measurement result includes at least one of the following:

[0374] N1 groups of channel state information measurement results, the N1 groups of channel state information measurement results including the channel state information measurement results of the N1 hops included in the subband; N1 is a positive integer;

[0375] a set of channel state information measurement results, where the set of channel state information measurement results is jointly processed based on N1 hops included in the subband;

[0376] The third frequency hopping information is used to indicate hop information associated with the channel state information measurement result of the sub-band.

[0377] Optionally, the network-side device receives terminal capability information reported by the terminal, where the terminal capability information includes at least one of the following:

[0378] The maximum wideband channel state information processing bandwidth processed by the terminal at the same time;

[0379] Total hop bandwidth;

[0380] Whether it supports processing downlink reference signals outside the active BWP;

[0381] Whether downlink reference signal frequency hopping is supported;

[0382] Whether cross-time slot frequency hopping of downlink reference signals is supported;

[0383] Maximum number of hops;

[0384] Maximum overlapping bandwidth;

[0385] Maximum bandwidth of each hop;

[0386] Switching time between adjacent hops.

[0387] FIG8 is a third flow chart of a method for transmitting a downlink reference signal according to an embodiment of the present application. The method is performed by a terminal and a network-side device in cooperation. As shown in FIG8 , the method includes steps 801 to 803:

[0388] Step 801: The network side device sends a downlink reference signal to the terminal through frequency hopping transmission;

[0389] Step 802: The terminal receives a downlink reference signal sent by a network-side device via frequency hopping transmission; the terminal processes the downlink reference signals of multiple hops in the frequency hopping transmission to obtain a jointly processed channel state information measurement result and / or a non-jointly processed channel state information measurement result;

[0390] Step 803: The terminal reports a channel state information report to the network side device, where the channel state information report includes the channel state information measurement result of the joint processing and / or the channel state information measurement result of the non-joint processing; the network side device receives the channel state information report reported by the terminal.

[0391] In an embodiment of the present application, a network-side device sends a downlink reference signal to a terminal through frequency hopping transmission, the terminal receives the downlink reference signal sent by the network-side device through frequency hopping transmission, processes the downlink reference signals of multiple hops in the frequency hopping transmission, obtains a jointly processed channel state information measurement result and / or a non-jointly processed channel state information measurement result, and then reports a channel state information report to the network-side device, where the channel state information report includes the jointly processed channel state information measurement result and / or the non-jointly processed channel state information measurement result, thereby enabling the terminal to process a large-bandwidth downlink reference signal with a small channel state information report overhead.

[0392] The downlink reference signal transmission method provided in the embodiment of the present application may be executed by a downlink reference signal transmission device. In the embodiment of the present application, the downlink reference signal transmission device provided in the embodiment of the present application is described by taking the downlink reference signal transmission method performed by the downlink reference signal transmission device as an example.

[0393] FIG9 is a schematic diagram of a structure of a downlink reference signal transmission apparatus according to an embodiment of the present application. As shown in FIG9 , a downlink reference signal transmission apparatus 900 is applied to a terminal. The downlink reference signal transmission apparatus 900 includes: a first receiving module 901, a processing module 902, and a reporting module 903, wherein:

[0394] The first receiving module 901 is configured to receive a downlink reference signal sent by a network-side device via frequency hopping transmission;

[0395] A processing module 902 is configured to process downlink reference signals of multiple hops in the frequency hopping transmission to obtain a jointly processed channel state information measurement result and / or a non-jointly processed channel state information measurement result;

[0396] The reporting module 903 is configured to report a channel state information report to the network side device, where the channel state information report includes the channel state information measurement result of the joint processing and / or the channel state information measurement result of the non-joint processing.

[0397] In an embodiment of the present application, by receiving a downlink reference signal sent by a network side device through frequency hopping transmission, processing the downlink reference signals of multiple hops in the frequency hopping transmission, obtaining a jointly processed channel state information measurement result and / or a non-jointly processed channel state information measurement result, and then reporting a channel state information report to the network side device, including the jointly processed channel state information measurement result and / or the non-jointly processed channel state information measurement result in the channel state information report, so that the terminal can process a large bandwidth downlink reference signal, and the channel state information report overhead is small.

[0398] Optionally, multiple hops in the frequency hopping transmission are defined in the same downlink reference signal resource.

[0399] Optionally, the hop pattern of the frequency hopping transmission is determined based on at least one of the following hop parameters:

[0400] Frequency hopping frequency domain related parameters, including at least one of the hop number, hop bandwidth, overlapping bandwidth between adjacent hops in the frequency domain, hop starting physical resource block (PRB), and total hop bandwidth;

[0401] Frequency hopping time domain related parameters include at least one of the starting time slot offset of the hop, the starting symbol of the downlink reference signal within the hop, and the hop period, or include at least one of the starting time slot offset of the downlink reference signal resource, N starting symbols of the downlink reference signal resource, and the number of starting symbols occupied by one hop; N is a positive integer;

[0402] Time-frequency mapping related parameters include at least one of the hop time domain index, the hop frequency domain index, and the hop direction factor.

[0403] Optionally, the hop start PRB is determined based on at least one of the following:

[0404] The hop start PRB of each hop is configured separately;

[0405] The hop start PRB of each hop is determined according to the configured start PRB of the first hop in the time domain and / or the lowest hop in the frequency domain, the hop bandwidth, and the overlapping bandwidth between adjacent hops in the frequency domain.

[0406] Optionally, the frequency hopping transmission satisfies at least one of the following:

[0407] The lowest and / or highest hop boundary of the frequency domain position in the frequency hopping transmission is aligned with a specific frequency domain range boundary, where the specific frequency domain range includes at least one of an active BWP, a virtual BWP, a carrier, and a hop total bandwidth boundary;

[0408] Each hop boundary in the frequency hopping transmission is aligned with a subband boundary;

[0409] The hop parameters of different downlink reference signal resources within a resource group are consistent except for the hop time domain position.

[0410] The terminal does not expect the interval between adjacent hops in the time domain to exceed a first switching time; the first switching time is determined by at least one of a network instruction, a protocol agreement, or a terminal capability;

[0411] The terminal does not expect the downlink reference signal within a hop to cross the time slot boundary;

[0412] The terminal does not expect the hop bandwidth to exceed the maximum bandwidth supported by the terminal;

[0413] The same port on different hops uses the same sequence during sequence mapping;

[0414] Each hop in the frequency hopping transmission maps all downlink reference signal ports.

[0415] Optionally, the lowest and / or highest hop boundary in the frequency domain position in the frequency hopping transmission is aligned with a specific frequency domain range boundary, including at least one of the following:

[0416] If the frequency domain position of the lowest and / or highest hop exceeds the specific frequency domain range, the resources in the hop that exceed the specific frequency domain range are not used to send the downlink reference signal;

[0417] If the frequency domain position of the lowest and / or highest hop in the frequency domain exceeds the specific frequency domain range, at least one of the starting PRB of the hop and the overlapping bandwidth of the hop and the hop adjacent to the frequency domain is adjusted so that the frequency domain position of the hop falls within the specific frequency domain range.

[0418] Optionally, each hop boundary in the frequency hopping transmission is aligned with a subband boundary, including at least one of the following:

[0419] The starting PRB of each hop is aligned with the starting PRB of the subband;

[0420] The end PRB of each hop is aligned with the end PRB of the subband;

[0421] The overlapping bandwidth between adjacent hops in the frequency domain is an integer multiple of the sub-band;

[0422] The bandwidth of each hop is an integer multiple of the sub-band.

[0423] Optionally, at least one of the following parameters of different hops in the frequency hopping transmission is the same:

[0424] Downlink reference signal resource identifier;

[0425] Power control offset;

[0426] Scrambling code identification;

[0427] Quasi-co-sited QCL parameters;

[0428] Frequency domain allocation parameters within resource blocks (RBs);

[0429] The number of downlink reference signal ports included in the hop;

[0430] The port index included in the hop;

[0431] Code Division Multiplexing CDM type;

[0432] CDM group size;

[0433] CDM group index;

[0434] Frequency domain density.

[0435] Optionally, the first parameter in the hop parameter is carried by at least one of the following messages: a media access control MAC control element CE and downlink control information DCI;

[0436] The second parameter in the hop parameter is configured by high-layer signaling and / or agreed upon by a protocol.

[0437] Optionally, in the process of the terminal receiving a downlink reference signal sent by a network-side device through frequency hopping transmission, the terminal satisfies any one of the following conditions:

[0438] The terminal ignores or does not receive hops outside the active BWP range;

[0439] The terminal receives hops outside the active BWP range.

[0440] Optionally, the first receiving module 901 is configured to receive a hop outside the active BWP range when a target condition is met, wherein the target condition includes at least one of the following:

[0441] A network configuration enabling condition, used to enable the terminal to receive hops outside the active BWP range;

[0442] The network configures the hop of the downlink reference signal;

[0443] Network configuration MG;

[0444] Network configuration virtual BWP.

[0445] Optionally, the first receiving module 901 is configured to perform at least one of the following:

[0446] The terminal ignores the frequency domain range restriction of the hop of the downlink reference signal by the active BWP;

[0447] The terminal receives the hop in the frequency hopping transmission in a measurement gap MG;

[0448] The terminal receives the hop in the frequency hopping transmission within the virtual BWP.

[0449] Optionally, the virtual BWP satisfies at least one of the following:

[0450] The bandwidth of the virtual BWP is greater than the maximum bandwidth supported by the terminal;

[0451] The bandwidth received or processed by the terminal in the virtual BWP at the same time does not exceed the maximum bandwidth supported by the terminal;

[0452] The bandwidth of the virtual BWP does not exceed the total hop bandwidth of the joint processing of the terminals;

[0453] The bandwidth of the virtual BWP does not exceed the carrier bandwidth;

[0454] The bandwidth range of the virtual BWP includes the total hop bandwidth;

[0455] The terminal processes only the downlink reference signal on the virtual BWP;

[0456] The parameter set of the virtual BWP is the same as the downlink reference signal;

[0457] The frequency domain position reference point of the virtual BWP is the starting point or reference point A of the carrier.

[0458] Optionally, when the terminal receives a hop outside the active BWP range or a network configures a virtual BWP, the terminal satisfies at least one of the following:

[0459] The terminal ignores the BWP ID included in the downlink reference signal configuration;

[0460] The terminal does not expect the downlink reference signal configuration to include a BWP ID;

[0461] The BWP ID included in the downlink reference signal configuration received by the terminal is used to indicate a virtual BWP.

[0462] Optionally, the processing module 902 is configured to:

[0463] After measuring all hops in the frequency hopping transmission, switching to the active BWP;

[0464] In the case that the interval between the adjacent hops in the time domain is greater than the second switching time, switching to the active BWP is performed between the adjacent hops in the time domain.

[0465] Optionally, the channel state information report includes at least one of the following:

[0466] A first measurement result, where the first measurement result includes: a channel state information measurement result of each of X hops in the frequency hopping transmission or a channel state information measurement result of each of all hops in the frequency hopping transmission; X is a positive integer;

[0467] first indication information, where the first indication information is used to indicate that the first measurement result is a single-hop channel state information measurement result;

[0468] first frequency hopping information, where the first frequency hopping information is used to indicate hop information associated with the first measurement result;

[0469] A second measurement result, where the second measurement result includes: a channel state information measurement result of Y hops jointly processed in the frequency hopping transmission or a channel state information measurement result of all hops jointly processed in the frequency hopping transmission; Y is a positive integer;

[0470] second indication information, where the second indication information is used to indicate that the second measurement result is a channel state information measurement result of multi-hop joint processing;

[0471] Second frequency hopping information, where the second frequency hopping information is used to indicate hop information associated with the second measurement result.

[0472] Optionally, the reporting module 903 is specifically configured to, when at least one port of one or more target hops of the frequency hopping transmission is discarded, report the channel state information report by the terminal to the network side device based on a target mode, wherein the target mode is at least one of the following:

[0473] Ignore the measurement and / or reporting of the channel state information;

[0474] Ignore the measurement and / or reporting of all ports of the target hop;

[0475] The measurement and / or reporting of ports for which the target hop is not dropped is considered.

[0476] Optionally, the channel state information report includes at least one of the following:

[0477] Wideband channel state information measurement results obtained based on multiple hops with complete ports in the frequency hopping transmission;

[0478] Subband channel state information measurement results obtained based on multiple hops with complete ports in the frequency hopping transmission;

[0479] A sub-band channel state information measurement result obtained based on the hop in which at least some ports are discarded in the frequency hopping transmission;

[0480] Wideband channel state information measurement results obtained based on complete ports in all hops of the frequency hopping transmission;

[0481] The sub-band channel state information measurement results are obtained based on the complete ports in all hops of the frequency hopping transmission.

[0482] Optionally, the first receiving module 901 is further configured to receive reporting indication information sent by the network side device, where the reporting indication information is used to instruct the terminal to jointly process downlink reference signals of multiple hops.

[0483] Optionally, the processing module 902 is configured to perform downlink reference signal measurement according to at least one set of subband configurations;

[0484] The reporting module 903 is configured to report a channel state information measurement result, wherein the subband configuration includes at least one of a subband start point, a subband end point, a subband bitmap, and a subband size.

[0485] Optionally, at least one of the starting point of the subband, the end point of the subband and the bitmap of the subband in the subband configuration is determined based on the target frequency domain range, wherein the target frequency domain range includes at least one of active BWP, virtual BWP, carrier, all hop frequency domain ranges and hop frequency domain range.

[0486] Optionally, the size of the subband in the subband configuration is mapped according to the target bandwidth; or, the size of the subband in the subband configuration is indicated by the network side device from at least one candidate value, and the at least one candidate value is mapped according to the target bandwidth;

[0487] The target bandwidth includes at least one of a bandwidth consistent with the target frequency domain range, a hop bandwidth, a hop bandwidth with a minimum bandwidth, a hop bandwidth with a maximum bandwidth, and a bandwidth indicated by a network-side device.

[0488] Optionally, the subband configuration satisfies: when there is no overlapping bandwidth between adjacent hops in the frequency domain, the terminal does not expect one subband to include multiple hops.

[0489] Optionally, each hop is associated with a group of subband configurations, or multiple hops are associated with the same subband configuration.

[0490] Optionally, the jointly processed channel state information measurement result includes: a jointly processed subband channel state information subband CSI measurement result, wherein the subband CSI measurement result is a result of frequency domain compression after compensating for phase offsets between multiple hops in the frequency hopping transmission.

[0491] Optionally, the subband CSI measurement result includes at least one of the following:

[0492] N1 groups of channel state information measurement results, the N1 groups of channel state information measurement results including the channel state information measurement results of the N1 hops included in the subband; N1 is a positive integer;

[0493] a set of channel state information measurement results, where the set of channel state information measurement results is jointly processed based on N1 hops included in the subband;

[0494] The third frequency hopping information is used to indicate hop information associated with the channel state information measurement result of the sub-band.

[0495] Optionally, the reporting module 903 is further configured to report terminal capability information to the network-side device, wherein the terminal capability information includes at least one of the following:

[0496] The maximum wideband channel state information processing bandwidth processed by the terminal at the same time;

[0497] Total hop bandwidth;

[0498] Whether it supports processing downlink reference signals outside the active BWP;

[0499] Whether downlink reference signal frequency hopping is supported;

[0500] Whether cross-time slot frequency hopping of downlink reference signals is supported;

[0501] Maximum number of hops;

[0502] Maximum overlapping bandwidth;

[0503] Maximum bandwidth of each hop;

[0504] Switching time between adjacent hops.

[0505] The downlink reference signal transmission apparatus in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component of an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal or other device other than a terminal. For example, the terminal can include, but is not limited to, the types of terminal 11 listed above. Other devices can include servers, network attached storage (NAS), and the like, and are not specifically limited in the embodiments of the present application.

[0506] The downlink reference signal transmission device provided in the embodiment of the present application can implement the various processes implemented in the method embodiments of Figures 2 to 6 and achieve the same technical effects. To avoid repetition, they will not be described here.

[0507] FIG10 is a second structural diagram of a downlink reference signal transmission apparatus provided in an embodiment of the present application. As shown in FIG10 , a downlink reference signal transmission apparatus 1000 is applied to a network-side device. The downlink reference signal transmission apparatus 1000 includes: a sending module 1001 and a second receiving module 1002, wherein:

[0508] The sending module 1001 is configured to send a downlink reference signal to a terminal via frequency hopping transmission;

[0509] The second receiving module 1002 is used to receive a channel state information report reported by the terminal, where the channel state information report includes a jointly processed channel state information measurement result and / or a non-jointly processed channel state information measurement result obtained after the terminal processes the downlink reference signals of multiple hops in the frequency hopping transmission.

[0510] In an embodiment of the present application, a downlink reference signal is sent to a terminal via frequency hopping transmission. The terminal receives the downlink reference signal sent via frequency hopping transmission, processes the downlink reference signals of multiple hops in the frequency hopping transmission, obtains a jointly processed channel state information measurement result and / or a non-jointly processed channel state information measurement result, and then reports a channel state information report to a network side device. The channel state information report includes the jointly processed channel state information measurement result and / or the non-jointly processed channel state information measurement result, thereby enabling the terminal to process a large-bandwidth downlink reference signal with a small channel state information report overhead.

[0511] Optionally, multiple hops in the frequency hopping transmission are defined in the same downlink reference signal resource.

[0512] Optionally, the hop pattern of the frequency hopping transmission is determined based on at least one of the following hop parameters:

[0513] Frequency hopping frequency domain related parameters, including at least one of the hop number, hop bandwidth, overlapping bandwidth between adjacent hops in the frequency domain, hop starting physical resource block (PRB), and total hop bandwidth;

[0514] Frequency hopping time domain related parameters include at least one of the starting time slot offset of the hop, the starting symbol of the downlink reference signal within the hop, and the hop period, or include at least one of the starting time slot offset of the downlink reference signal resource, N starting symbols of the downlink reference signal resource, and the number of starting symbols occupied by one hop; N is a positive integer;

[0515] Time-frequency mapping related parameters include at least one of the hop time domain index, the hop frequency domain index, and the hop direction factor.

[0516] Optionally, the hop start PRB is determined based on at least one of the following:

[0517] The hop start PRB of each hop is configured separately;

[0518] The hop start PRB of each hop is determined according to the configured start PRB of the first hop in the time domain and / or the lowest hop in the frequency domain, the hop bandwidth, and the overlapping bandwidth between adjacent hops in the frequency domain.

[0519] Optionally, the frequency hopping transmission satisfies at least one of the following:

[0520] The lowest and / or highest hop boundary of the frequency domain position in the frequency hopping transmission is aligned with a specific frequency domain range boundary, where the specific frequency domain range includes at least one of an active BWP, a virtual BWP, a carrier, and a hop total bandwidth boundary;

[0521] Each hop boundary in the frequency hopping transmission is aligned with a subband boundary;

[0522] The hop parameters of different downlink reference signal resources within a resource group are consistent except for the hop time domain position.

[0523] The terminal does not expect the interval between adjacent hops in the time domain to exceed a first switching time; the first switching time is determined by at least one of a network instruction, a protocol agreement, or a terminal capability;

[0524] The terminal does not expect the downlink reference signal within a hop to cross the time slot boundary;

[0525] The terminal does not expect the hop bandwidth to exceed the maximum bandwidth supported by the terminal;

[0526] The same port on different hops uses the same sequence during sequence mapping;

[0527] Each hop in the frequency hopping transmission maps all downlink reference signal ports.

[0528] Optionally, the lowest and / or highest hop boundary in the frequency domain position in the frequency hopping transmission is aligned with a specific frequency domain range boundary, including at least one of the following:

[0529] If the frequency domain position of the lowest and / or highest hop exceeds the specific frequency domain range, the resources in the hop that exceed the specific frequency domain range are not used to send the downlink reference signal;

[0530] If the frequency domain position of the lowest and / or highest hop in the frequency domain exceeds the specific frequency domain range, at least one of the starting PRB of the hop and the overlapping bandwidth of the hop and the hop adjacent to the frequency domain is adjusted so that the frequency domain position of the hop falls within the specific frequency domain range.

[0531] Optionally, each hop boundary in the frequency hopping transmission is aligned with a subband boundary, including at least one of the following:

[0532] The starting PRB of each hop is aligned with the starting PRB of the subband;

[0533] The end PRB of each hop is aligned with the end PRB of the subband;

[0534] The overlapping bandwidth between adjacent hops in the frequency domain is an integer multiple of the sub-band;

[0535] The bandwidth of each hop is an integer multiple of the sub-band.

[0536] Optionally, at least one of the following parameters of different hops in the frequency hopping transmission is the same:

[0537] Downlink reference signal resource identifier;

[0538] Power control offset;

[0539] Scrambling code identification;

[0540] Quasi-co-sited QCL parameters;

[0541] Frequency domain allocation parameters within resource blocks (RBs);

[0542] The number of downlink reference signal ports included in the hop;

[0543] The port index included in the hop;

[0544] Code Division Multiplexing CDM type;

[0545] CDM group size;

[0546] CDM group index;

[0547] Frequency domain density.

[0548] Optionally, the first parameter in the hop parameter is carried by at least one of the following messages: a media access control MAC control element CE and downlink control information DCI;

[0549] The second parameter in the hop parameter is configured by high-layer signaling and / or agreed upon by a protocol.

[0550] Optionally, the channel state information report includes at least one of the following:

[0551] A first measurement result, where the first measurement result includes: a channel state information measurement result of each of X hops in the frequency hopping transmission or a channel state information measurement result of each of all hops in the frequency hopping transmission; X is a positive integer;

[0552] first indication information, where the first indication information is used to indicate that the first measurement result is a single-hop channel state information measurement result;

[0553] first frequency hopping information, where the first frequency hopping information is used to indicate hop information associated with the first measurement result;

[0554] A second measurement result, where the second measurement result includes: a channel state information measurement result of Y hops jointly processed in the frequency hopping transmission or a channel state information measurement result of all hops jointly processed in the frequency hopping transmission; Y is a positive integer;

[0555] second indication information, where the second indication information is used to indicate that the second measurement result is a channel state information measurement result of multi-hop joint processing;

[0556] Second frequency hopping information, where the second frequency hopping information is used to indicate hop information associated with the second measurement result.

[0557] Optionally, the channel state information report includes at least one of the following:

[0558] Wideband channel state information measurement results obtained based on multiple hops with complete ports in the frequency hopping transmission;

[0559] Subband channel state information measurement results obtained based on multiple hops with complete ports in the frequency hopping transmission;

[0560] A sub-band channel state information measurement result obtained based on the hop in which at least some ports are discarded in the frequency hopping transmission;

[0561] Wideband channel state information measurement results obtained based on complete ports in all hops of the frequency hopping transmission;

[0562] The sub-band channel state information measurement results are obtained based on the complete ports in all hops of the frequency hopping transmission.

[0563] Optionally, the sending module 1001 is further configured to send reporting indication information to the terminal, where the reporting indication information is used to instruct the terminal to jointly process downlink reference signals of multiple hops.

[0564] Optionally, the jointly processed channel state information measurement result includes: a jointly processed subband channel state information subband CSI measurement result, wherein the subband CSI measurement result is a result of frequency domain compression after compensating for phase offsets between multiple hops in the frequency hopping transmission.

[0565] Optionally, the subband CSI measurement result includes at least one of the following:

[0566] N1 groups of channel state information measurement results, the N1 groups of channel state information measurement results including the channel state information measurement results of the N1 hops included in the subband; N1 is a positive integer;

[0567] a set of channel state information measurement results, where the set of channel state information measurement results is jointly processed based on N1 hops included in the subband;

[0568] The third frequency hopping information is used to indicate hop information associated with the channel state information measurement result of the sub-band.

[0569] Optionally, the second receiving module 1002 is further configured to receive terminal capability information reported by the terminal, wherein the terminal capability information includes at least one of the following:

[0570] The maximum wideband channel state information processing bandwidth processed by the terminal at the same time;

[0571] Total hop bandwidth;

[0572] Whether it supports processing downlink reference signals outside the active BWP;

[0573] Whether downlink reference signal frequency hopping is supported;

[0574] Whether cross-time slot frequency hopping of downlink reference signals is supported;

[0575] Maximum number of hops;

[0576] Maximum overlapping bandwidth;

[0577] Maximum bandwidth of each hop;

[0578] Switching time between adjacent hops.

[0579] The downlink reference signal transmission apparatus 1000 in the embodiment of the present application can be an electronic device, such as an electronic device with an operating system, or a component of an electronic device, such as an integrated circuit or chip. The electronic device can be a network-side device, or a device other than a network-side device. For example, the network-side device can include, but is not limited to, the types of network-side devices 12 listed above, and is not specifically limited in the embodiment of the present application.

[0580] The downlink reference signal transmission device 1000 provided in the embodiment of the present application can implement each process implemented in the method embodiment of Figure 7 and achieve the same technical effect. To avoid repetition, it will not be described here.

[0581] The embodiment of the present application further provides a communication device. FIG11 is a schematic diagram of the structure of the communication device provided in the embodiment of the present application. As shown in FIG11, the communication device 1100 includes a processor 1101 and a memory 1102. The memory 1102 stores a program or instruction that can be executed on the processor 1101. For example, when the communication device 1100 is a terminal, the program or instruction, when executed by the processor 1101, implements the various steps of the embodiment of the downlink reference signal transmission method shown in FIG2 above, and can achieve the same technical effect. When the communication device 1100 is a network-side device, the program or instruction, when executed by the processor 1101, implements the various steps of the embodiment of the downlink reference signal transmission method shown in FIG7 above, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0582] The present application also provides a terminal including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps in the method embodiment shown in FIG2 . This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment are applicable to this terminal embodiment and can achieve the same technical effects.

[0583] The present application also provides a terminal. Figure 12 is a schematic diagram of the hardware structure of the terminal provided in the present application. As shown in Figure 12, the terminal 1200 includes, but is not limited to, at least some of the components including a radio frequency unit 1201, a network module 1202, an audio output unit 1203, an input unit 1204, a sensor 1205, a display unit 1206, a user input unit 1207, an interface unit 1208, a memory 1209, and a processor 1210.

[0584] Those skilled in the art will appreciate that the terminal 1200 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 1210 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG12 does not limit the terminal. The terminal may include more or fewer components than shown, or may combine certain components, or have different component arrangements, which will not be described in detail here.

[0585] It should be understood that in an embodiment of the present application, the input unit 1204 may include a graphics processing unit (GPU) 12041 and a microphone 12042, and the graphics processing unit 12041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1206 may include a display panel 12061, and the display panel 12061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1207 includes a touch panel 12071 and at least one of other input devices 12072. The touch panel 12071 is also called a touch screen. The touch panel 12071 may include two parts: a touch detection device and a touch controller. Other input devices 12072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0586] In the embodiment of the present application, after receiving downlink data from a network-side device, the RF unit 1201 may transmit the data to the processor 1210 for processing. Furthermore, the RF unit 1201 may send uplink data to the network-side device. Typically, the RF unit 1201 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0587] The memory 1209 can be used to store software programs or instructions and various data. The memory 1209 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, applications or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 1209 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DRRAM). The memory 1209 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0588] Processor 1210 may include one or more processing units. Optionally, processor 1210 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 1210.

[0589] The radio frequency unit 1201 is configured to receive a downlink reference signal sent by a network-side device via frequency hopping transmission;

[0590] The processor 1210 is configured to process downlink reference signals of multiple hops in the frequency hopping transmission to obtain a jointly processed channel state information measurement result and / or a non-jointly processed channel state information measurement result;

[0591] The radio frequency unit 1201 is further configured to report a channel state information report to the network side device, where the channel state information report includes the channel state information measurement result of the joint processing and / or the channel state information measurement result of the non-joint processing.

[0592] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the method embodiment shown in Figure 2, and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0593] The present application also provides a network-side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiment shown in FIG7 . This network-side device embodiment corresponds to the aforementioned network-side device method embodiment, and each implementation process and implementation method of the aforementioned method embodiment are applicable to this network-side device embodiment and can achieve the same technical effects.

[0594] The embodiment of the present application also provides a network-side device. Figure 13 is a schematic diagram of the hardware structure of the network-side device provided in the embodiment of the present application. As shown in Figure 13, the network-side device 1300 includes: an antenna 131, a radio frequency device 132, a baseband device 133, a processor 134, and a memory 135. The antenna 131 is connected to the radio frequency device 132. In the uplink direction, the radio frequency device 132 receives information through the antenna 131 and sends the received information to the baseband device 133 for processing. In the downlink direction, the baseband device 133 processes the information to be sent and sends it to the radio frequency device 132. The radio frequency device 132 processes the received information and sends it out through the antenna 131.

[0595] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 133 , which includes a baseband processor.

[0596] The baseband device 133 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in Figure 13, one of the chips is, for example, a baseband processor, which is connected to the memory 135 through a bus interface to call the program in the memory 135 to execute the network device operations shown in the above method embodiment.

[0597] The network side device may further include a network interface 136 , which is, for example, a Common Public Radio Interface (CPRI).

[0598] Specifically, the network side device 1300 of the embodiment of the present application also includes: instructions or programs stored in the memory 135 and can be run on the processor 134. The processor 134 calls the instructions or programs in the memory 135 to execute the steps of the method embodiment shown in Figure 7 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0599] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned downlink reference signal transmission method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0600] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0601] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned downlink reference signal transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0602] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0603] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the various processes of the above-mentioned downlink reference signal transmission method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0604] An embodiment of the present application also provides a downlink reference signal transmission system, including: a terminal and a network-side device, wherein the terminal can be used to execute the steps of the method embodiment shown in Figure 2, and the network-side device can be used to execute the steps of the method embodiment shown in Figure 7.

[0605] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0606] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general-purpose hardware platform, or of course, by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes a number of instructions for enabling a terminal or network-side device to execute the methods described in each embodiment of the present application.

[0607] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of this application and the scope of protection of the claims. These implementation methods are all within the protection of this application.

Claims

1. A method for transmitting a downlink reference signal, comprising: The terminal receives a downlink reference signal sent by a network side device through frequency hopping transmission; The terminal processes downlink reference signals of multiple hops in the frequency hopping transmission to obtain a jointly processed channel state information measurement result and / or a non-jointly processed channel state information measurement result; The terminal reports a channel state information report to the network side device, where the channel state information report includes the channel state information measurement result of the joint processing and / or the channel state information measurement result of the non-joint processing.

2. The method for transmitting a downlink reference signal according to claim 1, wherein: The multiple hops in the frequency hopping transmission are defined in the same downlink reference signal resource.

3. The method for transmitting a downlink reference signal according to claim 1 or 2, wherein: The hop pattern of the frequency hopping transmission is determined based on at least one of the following hop parameters: Frequency hopping frequency domain related parameters, including at least one of the hop number, hop bandwidth, overlapping bandwidth between adjacent hops in the frequency domain, hop start physical resource block PRB and hop total bandwidth; The frequency hopping time domain related parameters include at least one of the starting time slot offset of the hop, the starting symbol of the downlink reference signal within the hop, and the period of the hop, or include at least one of the starting time slot offset of the downlink reference signal resource, the N starting symbols of the downlink reference signal resource, and the number of starting symbols occupied by one hop; N is a positive integer; The time-frequency mapping related parameters include at least one of a hop time domain index, a hop frequency domain index, and a hop direction factor.

4. The method for transmitting a downlink reference signal according to claim 3, wherein: The hop start PRB is determined based on at least one of the following: The hop start PRB of each hop is configured separately; The hop start PRB of each hop is determined according to the configured start PRB of the first hop in the time domain and / or the lowest hop in the frequency domain, the hop bandwidth, and the overlapping bandwidth between adjacent hops in the frequency domain.

5. The method for transmitting a downlink reference signal according to claim 3 or 4, wherein: The frequency hopping transmission satisfies at least one of the following: The lowest and / or highest hop boundary of the frequency domain position in the frequency hopping transmission is aligned with a specific frequency domain range boundary, and the specific frequency domain range includes at least one of an active BWP, a virtual BWP, a carrier, and a hop total bandwidth boundary; Each hop boundary in the frequency hopping transmission is aligned with a subband boundary; Among the hop parameters of different downlink reference signal resources in a resource group, other hop parameters except the hop time domain position are the same; The terminal does not expect the interval between adjacent hops in the time domain to exceed a first switching time; the first switching time is determined by at least one of a network indication, a protocol agreement, or a terminal capability; The terminal does not expect a downlink reference signal within a hop to cross a time slot boundary; The terminal does not expect the hop bandwidth to exceed the maximum bandwidth supported by the terminal; The same port on different hops uses the same sequence during sequence mapping; Each hop in the frequency hopping transmission maps all downlink reference signal ports.

6. The method for transmitting a downlink reference signal according to claim 5, wherein: The lowest and / or highest hop boundary of the frequency domain position in the frequency hopping transmission is aligned with a specific frequency domain range boundary, including at least one of the following: If the frequency domain position of the lowest and / or highest hop in the frequency domain exceeds the specific frequency domain range, the resources in the hop that exceed the specific frequency domain range are not used to send the downlink reference signal; If the frequency domain position of the lowest and / or highest hop in the frequency domain exceeds the specific frequency domain range, at least one of the starting PRB of the hop and the overlapping bandwidth of the hop and the hop adjacent to the frequency domain is adjusted so that the frequency domain position of the hop falls within the specific frequency domain range.

7. The method for transmitting a downlink reference signal according to claim 5, wherein: Each hop boundary in the frequency hopping transmission is aligned with a subband boundary, including at least one of the following: The starting PRB of each hop is aligned with the starting PRB of the subband; The end PRB of each hop is aligned with the end PRB of the subband; The overlapping bandwidth between adjacent hops in the frequency domain is an integer multiple of the sub-band; The bandwidth of each hop is an integer multiple of the sub-band.

8. The method for transmitting a downlink reference signal according to any one of claims 1 to 7, wherein: In the process of the terminal receiving a downlink reference signal sent by a network side device through frequency hopping transmission, the terminal satisfies any one of the following: The terminal ignores or does not receive hops outside the active BWP range; The terminal receives hops outside the active BWP range.

9. The method for transmitting a downlink reference signal according to claim 8, wherein: The terminal receives a hop outside the active BWP range, including: When a target condition is met, the terminal receives a hop outside the active BWP range, wherein the target condition includes at least one of the following: A network configuration enabling condition, used to enable the terminal to allow receiving hops outside the active BWP range; The network configures the hop of the downlink reference signal; Network configuration MG; Network configuration virtual BWP.

10. The method for transmitting a downlink reference signal according to claim 8 or 9, wherein: The terminal receives a hop outside the active BWP range, including at least one of the following: The terminal ignores the restriction of the frequency domain range of the hop of the downlink reference signal by the active BWP; The terminal receives the hop in the frequency hopping transmission in a measurement interval MG; The terminal receives the hop in the frequency hopping transmission within the virtual BWP.

11. The method for transmitting a downlink reference signal according to claim 10, wherein: The virtual BWP satisfies at least one of the following: The bandwidth of the virtual BWP is greater than the maximum bandwidth supported by the terminal; At the same time, the bandwidth received or processed by the terminal in the virtual BWP does not exceed the maximum bandwidth supported by the terminal; The bandwidth of the virtual BWP does not exceed the total hop bandwidth of the joint processing of the terminals; The bandwidth of the virtual BWP does not exceed the carrier bandwidth; The bandwidth range of the virtual BWP includes the total hop bandwidth; The terminal processes only a downlink reference signal on the virtual BWP; The parameter set of the virtual BWP is the same as the downlink reference signal; The frequency domain position reference point of the virtual BWP is the starting point or reference point A of the carrier.

12. The method for transmitting a downlink reference signal according to any one of claims 9 to 11, wherein: In the case where the terminal receives a hop outside the active BWP range or the network configures a virtual BWP, the terminal satisfies at least one of the following: The terminal ignores the BWP ID included in the downlink reference signal configuration; The terminal does not expect the downlink reference signal configuration to include the BWP ID; The BWP ID included in the downlink reference signal configuration received by the terminal is used to indicate a virtual BWP.

13. The method for transmitting a downlink reference signal according to any one of claims 1 to 12, wherein: The channel state information report includes at least one of the following: A first measurement result, wherein the first measurement result includes: a channel state information measurement result of each of X hops in the frequency hopping transmission or a channel state information measurement result of each of all hops in the frequency hopping transmission; X is a positive integer; first indication information, where the first indication information is used to indicate that the first measurement result is a single-hop channel state information measurement result; first frequency hopping information, where the first frequency hopping information is used to indicate hop information associated with the first measurement result; A second measurement result, wherein the second measurement result includes: a channel state information measurement result of Y hops jointly processed in the frequency hopping transmission or a channel state information measurement result of all hops jointly processed in the frequency hopping transmission; Y is a positive integer; second indication information, where the second indication information is used to indicate that the second measurement result is a channel state information measurement result of multi-hop joint processing; Second frequency hopping information, where the second frequency hopping information is used to indicate hop information associated with the second measurement result.

14. The method for transmitting a downlink reference signal according to any one of claims 1 to 13, wherein: The terminal reports a channel state information report to the network side device, including: In a case where at least one port of one or more target hops of the frequency hopping transmission is discarded, the terminal reports the channel state information report to the network side device based on a target mode, wherein the target mode is at least one of the following: Ignore the measurement and / or reporting of the current channel state information; Ignore the measurement and / or reporting of all ports of the target hop; The measurement and / or reporting of ports for which the target hop is not dropped is considered.

15. The method for transmitting a downlink reference signal according to claim 14, wherein: The channel state information report includes at least one of the following: Wideband channel state information measurement results obtained based on multiple hops with complete ports in the frequency hopping transmission; Subband channel state information measurement results obtained based on multiple hops with complete ports in the frequency hopping transmission; A sub-band channel state information measurement result obtained based on the hop in which at least some ports are discarded in the frequency hopping transmission; A broadband channel state information measurement result obtained based on the complete ports in all hops of the frequency hopping transmission; The sub-band channel state information measurement results are obtained based on the complete ports in all hops of the frequency hopping transmission.

16. The method for transmitting a downlink reference signal according to any one of claims 1 to 15, wherein: The method further comprises: The terminal receives reporting indication information sent by the network side device, where the reporting indication information is used to instruct the terminal to jointly process downlink reference signals of multiple hops.

17. The method for transmitting a downlink reference signal according to any one of claims 1 to 16, wherein: The method further comprises: The terminal performs downlink reference signal measurement and / or reports channel state information measurement results according to at least one group of subband configurations, wherein the group of subband configurations includes at least one of a subband start point, a subband end point, a subband bitmap, and a subband size.

18. The method for transmitting a downlink reference signal according to claim 17, wherein: The jointly processed channel state information measurement result includes: a jointly processed subband channel state information subband CSI measurement result, wherein the subband CSI measurement result is a result of frequency domain compression after compensating for phase offsets between multiple hops in the frequency hopping transmission.

19. The method for transmitting a downlink reference signal according to claim 18, wherein: The subband CSI measurement result includes at least one of the following: N1 groups of channel state information measurement results, the N1 groups of channel state information measurement results including the channel state information measurement results of the N1 hops included in the subband; N1 is a positive integer; a set of channel state information measurement results, wherein the set of channel state information measurement results is jointly processed based on N1 hops included in the subband; The third frequency hopping information is used to indicate hop information associated with the channel state information measurement result of the sub-band.

20. The method for transmitting a downlink reference signal according to any one of claims 1 to 19, wherein: The method further comprises: The terminal reports terminal capability information to the network side device, wherein the terminal capability information includes at least one of the following: The maximum wideband channel state information processing bandwidth processed by the terminal at the same time; Total hop bandwidth; Whether to support processing of downlink reference signals outside the active BWP; Whether downlink reference signal frequency hopping is supported; Whether cross-time slot frequency hopping of downlink reference signals is supported; Maximum number of hops; Maximum overlapping bandwidth; Maximum bandwidth of each hop; Switching time between adjacent hops.

21. A method for transmitting a downlink reference signal, comprising: The network side device sends a downlink reference signal to the terminal through frequency hopping transmission; The network side device receives a channel state information report reported by the terminal, wherein the channel state information report includes a jointly processed channel state information measurement result and / or a non-jointly processed channel state information measurement result obtained after the terminal processes the downlink reference signals of multiple hops in the frequency hopping transmission.

22. The method for transmitting a downlink reference signal according to claim 21, wherein: The multiple hops in the frequency hopping transmission are defined in the same downlink reference signal resource.

23. The method for transmitting a downlink reference signal according to claim 21 or 22, wherein: The hop pattern of the frequency hopping transmission is determined based on at least one of the following hop parameters: Frequency hopping frequency domain related parameters, including at least one of the hop number, hop bandwidth, overlapping bandwidth between adjacent hops in the frequency domain, hop start physical resource block PRB and hop total bandwidth; The frequency hopping time domain related parameters include at least one of the starting time slot offset of the hop, the starting symbol of the downlink reference signal within the hop, and the period of the hop, or include at least one of the starting time slot offset of the downlink reference signal resource, the N starting symbols of the downlink reference signal resource, and the number of starting symbols occupied by one hop; N is a positive integer; The time-frequency mapping related parameters include at least one of a hop time domain index, a hop frequency domain index, and a hop direction factor.

24. The method for transmitting a downlink reference signal according to claim 21, wherein: The hop start PRB is determined based on at least one of the following: The hop start PRB of each hop is configured separately; The hop start PRB of each hop is determined according to the configured start PRB of the first hop in the time domain and / or the lowest hop in the frequency domain, the hop bandwidth, and the overlapping bandwidth between adjacent hops in the frequency domain.

25. The method for transmitting a downlink reference signal according to claim 23 or 24, wherein: The frequency hopping transmission satisfies at least one of the following: The lowest and / or highest hop boundary of the frequency domain position in the frequency hopping transmission is aligned with a specific frequency domain range boundary, and the specific frequency domain range includes at least one of an active BWP, a virtual BWP, a carrier, and a hop total bandwidth boundary; Each hop boundary in the frequency hopping transmission is aligned with a subband boundary; Among the hop parameters of different downlink reference signal resources in a resource group, other hop parameters except the hop time domain position are the same; The terminal does not expect the interval between adjacent hops in the time domain to exceed a first switching time; the first switching time is determined by at least one of a network indication, a protocol agreement, or a terminal capability; The terminal does not expect a downlink reference signal within a hop to cross a time slot boundary; The terminal does not expect the hop bandwidth to exceed the maximum bandwidth supported by the terminal; The same port on different hops uses the same sequence during sequence mapping; Each hop in the frequency hopping transmission maps all downlink reference signal ports.

26. The method for transmitting a downlink reference signal according to any one of claims 21 to 25, wherein: The method further comprises: The network side device sends reporting indication information to the terminal, where the reporting indication information is used to instruct the terminal to jointly process downlink reference signals of multiple hops.

27. A downlink reference signal transmission device, comprising: A first receiving module, configured to receive a downlink reference signal sent by a network side device through frequency hopping transmission; A processing module, used to process the downlink reference signals of multiple hops in the frequency hopping transmission to obtain a jointly processed channel state information measurement result and / or a non-jointly processed channel state information measurement result; The reporting module is used to report a channel state information report to the network side device, wherein the channel state information report includes the channel state information measurement result of the joint processing and / or the channel state information measurement result of the non-joint processing.

28. The downlink reference signal transmission device according to claim 27, wherein: The reporting module is specifically used for: In a case where at least one port of one or more target hops of the frequency hopping transmission is discarded, reporting the channel state information report to the network side device based on a target mode, wherein the target mode is at least one of the following: Ignore the measurement and / or reporting of the current channel state information; Ignore the measurement and / or reporting of all ports of the target hop; The measurement and / or reporting of ports for which the target hop is not dropped is considered.

29. The downlink reference signal transmission device according to claim 27 or 28, wherein: The first receiving module is further used for: Receive reporting indication information sent by the network side device, where the reporting indication information is used to instruct the terminal to jointly process downlink reference signals of multiple hops.

30. The downlink reference signal transmission device according to any one of claims 27 to 29, wherein: The processing module is further used for: Downlink reference signal measurement is performed according to at least one group of subband configurations; wherein the group of subband configurations includes at least one of a subband start point, a subband end point, a subband bitmap, and a subband size.

31. The downlink reference signal transmission device according to any one of claims 27 to 30, wherein: The reporting module is further used for: Reporting terminal capability information to the network side device, wherein the terminal capability information includes at least one of the following: The maximum wideband channel state information processing bandwidth processed by the terminal at the same time; Total hop bandwidth; Whether to support processing of downlink reference signals outside the active BWP; Whether downlink reference signal frequency hopping is supported; Whether cross-time slot frequency hopping of downlink reference signals is supported; Maximum number of hops; Maximum overlapping bandwidth; Maximum bandwidth of each hop; Switching time between adjacent hops.

32. A downlink reference signal transmission device, comprising: A sending module, used for sending a downlink reference signal to a terminal through frequency hopping transmission; The second receiving module is used to receive a channel state information report reported by the terminal, wherein the channel state information report includes a jointly processed channel state information measurement result and / or a non-jointly processed channel state information measurement result obtained after the terminal processes the downlink reference signals of multiple hops in the frequency hopping transmission.

33. The downlink reference signal transmission device according to claim 32, wherein: The sending module is further used for: Sending reporting indication information to the terminal, where the reporting indication information is used to instruct the terminal to jointly process downlink reference signals of multiple hops.

34. A terminal, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the downlink reference signal transmission method as described in any one of claims 1 to 20 are implemented.

35. A network side device, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the downlink reference signal transmission method as described in any one of claims 21 to 26 are implemented.

36. A readable storage medium storing a program or instruction, wherein the program or instruction, when executed by a processor, implements the downlink reference signal transmission method as described in any one of claims 1 to 20, or implements the steps of the downlink reference signal transmission method as described in any one of claims 21 to 26.

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