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

Abstract

The present application belongs to the technical field of wireless communications. Disclosed are a downlink reference signal transmission method, a terminal, and a network-side device. The downlink reference signal transmission method in the embodiments of the present application comprises: a terminal receiving downlink reference signals sent by a network-side device by means of frequency hopping, wherein different hops of the downlink reference signals are respectively mapped to different downlink reference signal resources; the terminal performing joint processing on the downlink reference signals on downlink reference signal resources respectively corresponding to different hops, so as to obtain CSI; and the terminal reporting the CSI to the network-side device.

Description

Downlink reference signal transmission method, 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 202311776953.2 and invention name “Downlink reference signal transmission method, 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, a terminal, and a network-side device. Background Art

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

[0005] However, considering factors such as terminal capabilities and processing complexity, how the terminal processes the downlink reference signal with a large bandwidth 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, a terminal, and a network-side device, which can solve the problem of how the terminal processes a downlink reference signal 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 in a frequency hopping manner, where different hops of the downlink reference signal are mapped to different downlink reference signal resources;

[0009] The terminal jointly processes the downlink reference signals on downlink reference signal resources corresponding to different hops to obtain channel state information CSI;

[0010] The terminal reports the CSI to the network side device.

[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 in a frequency hopping manner, where different hops of the downlink reference signal are mapped to different downlink reference signal resources;

[0013] The network-side device receives channel state information CSI reported by the terminal, where the CSI is obtained by the terminal through joint processing of downlink reference signals on downlink reference signal resources corresponding to different hops.

[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 in a frequency hopping manner, where different hops of the downlink reference signal are mapped to different downlink reference signal resources;

[0016] a processing module, configured to jointly process the downlink reference signals on the downlink reference signal resources corresponding to different hops to obtain channel state information CSI;

[0017] A reporting module is used to report the CSI to the network side device.

[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 in a frequency hopping manner, wherein different hops of the downlink reference signal are mapped to different downlink reference signal resources;

[0020] The second receiving module is configured to receive channel state information CSI reported by the terminal, where the CSI is obtained by the terminal performing joint processing on the downlink reference signals on downlink reference signal resources corresponding to different hops.

[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 configured to receive a downlink reference signal sent by a network-side device in a frequency hopping manner, where different hops of the downlink reference signal are mapped to different downlink reference signal resources;

[0024] The processor is configured to jointly process the downlink reference signals on the downlink reference signal resources corresponding to different hops to obtain channel state information CSI;

[0025] The communication interface is further used to report the CSI to the network side device.

[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 the eighth aspect, a network side device is provided, including a processor and a communication interface, wherein the communication interface is used to: send a downlink reference signal to the terminal through a frequency hopping manner, and different hops of the downlink reference signal are mapped to different downlink reference signal resources; receive channel state information CSI reported by the terminal, and the CSI is obtained by the terminal jointly processing the downlink reference signals on the downlink reference signal resources corresponding to different hops.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] In an embodiment of the present application, a downlink reference signal sent by a network-side device through a frequency hopping manner is received by a terminal. Different hops of the downlink reference signal are mapped to different downlink reference signal resources. The terminal jointly processes the downlink reference signals on the downlink reference signal resources corresponding to different hops to obtain CSI and report it, so that the terminal can process downlink reference signals with a large bandwidth and the channel state information reporting overhead is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] FIG1 shows a block diagram of a wireless communication system to which embodiments of the present application may be applied;

[0034] FIG2 is a schematic diagram of a flow chart of a downlink reference signal transmission method according to an embodiment of the present application;

[0035] FIG3 is a schematic diagram of different resources corresponding to different hops in a CSI-RS resource set provided in an embodiment of the present application;

[0036] FIG4 is a schematic diagram of different CSI-RS resource sets corresponding to different hops provided in an embodiment of the present application;

[0037] FIG5 is a second flow chart of a method for transmitting a downlink reference signal according to an embodiment of the present application;

[0038] FIG6 is a third flow chart of a method for transmitting a downlink reference signal according to an embodiment of the present application;

[0039] FIG7 is a schematic diagram of a structure of a downlink reference signal transmission device according to an embodiment of the present application;

[0040] FIG8 is a second structural diagram of a downlink reference signal transmission device according to an embodiment of the present application;

[0041] FIG9 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0042] FIG10 is a schematic diagram of the hardware structure of a terminal provided in an embodiment of the present application;

[0043] FIG11 is a schematic diagram of the hardware structure of the network side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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. thGeneration, 6G) communication system.

[0048] 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 (WLAN) access point (AP) or a 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 relevant 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.

[0049] The downlink reference signal transmission method, terminal, and network-side device provided in the embodiments of the present application are described in detail below with reference to some embodiments and their application scenarios in conjunction with the accompanying drawings.

[0050] 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.

[0051] Step 201: The terminal receives a downlink reference signal sent by a network-side device in a frequency hopping manner, where different hops of the downlink reference signal are mapped to different downlink reference signal resources.

[0052] Optionally, the network side device sends a downlink reference signal to the terminal in a frequency hopping manner, and different hops of the downlink reference signal are respectively mapped to different downlink reference signal resources.

[0053] It should be noted that the downlink reference signal is used for measuring channel state information, and the downlink reference signal is, for example, a Channel State Information Reference Signal (CSI-RS).

[0054] Step 202: The terminal jointly processes the downlink reference signals on the downlink reference signal resources corresponding to different hops to obtain CSI.

[0055] For example, the network side device sends CSI-RS to the terminal in a frequency hopping manner, and different hops of CSI-RS (i.e., multiple hops of CSI-RS) are respectively mapped or configured on different CSI-RS resources. The terminal receives the CSI-RS sent by the network device in a frequency hopping manner. The terminal jointly processes the CSI-RS resources corresponding to different hops of CSI-RS to obtain CSI. Optionally, the implementation method of the joint processing may include: multiple hops form an equivalent large bandwidth, and the terminal obtains CSI measurement results 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.

[0056] Step 203: The terminal reports the CSI to the network-side device.

[0057] In an embodiment of the present application, a downlink reference signal sent by a network-side device through a frequency hopping manner is received by a terminal. Different hops of the downlink reference signal are mapped to different downlink reference signal resources. The terminal jointly processes the downlink reference signals on the downlink reference signal resources corresponding to different hops to obtain CSI and report it, so that the terminal can process downlink reference signals with a large bandwidth and the channel state information reporting overhead is small.

[0058] Optionally, an implementation scheme for mapping different hops of a downlink reference signal to different downlink reference signal resources may include at least one of the following:

[0059] Solution 1: Different hops of the downlink reference signal are on different downlink reference signal resources in the same downlink reference signal resource set.

[0060] For example, different CSI-RS resources are different CSI-RS resources within the same CSI-RS resource set, i.e., different CSI-RS hops are on different CSI-RS resources within the same CSI-RS resource set. Different CSI-RS resources within the same CSI-RS resource set represent different hops. Figure 3 is a schematic diagram illustrating different hops corresponding to different resources within a CSI-RS resource set, as provided in an embodiment of the present application.

[0061] Optionally, each hop of the downlink reference signal corresponds to one or more downlink reference signal resources in a downlink reference signal resource set. For example, M CSI-RS resources in a CSI-RS resource set correspond to N hops, where M and N are both positive integers.

[0062] Optionally, an implementation manner in which each hop of the downlink reference signal corresponds to one or more downlink reference signal resources in a downlink reference signal resource set may include at least one of the following:

[0063] Implementation 1: Different hops of the downlink reference signal correspond one-to-one with different downlink reference signal resources in a downlink reference signal resource set. For example, M=N, that is, the CSI-RS resources in a CSI-RS resource set correspond one-to-one with the hops.

[0064] Optionally, each downlink reference signal resource in different downlink reference signal resources in the downlink reference signal resource set is respectively configured or associated with its own hop. Optionally, each downlink reference signal resource is respectively configured or associated with a corresponding hop, which can also be described as: each downlink reference signal resource is respectively configured or associated with a corresponding hop identifier (ID).

[0065] For example, each CSI-RS resource is respectively configured with or associated with a corresponding hop, which can be understood as respectively configuring or associating each CSI-RS resource with a corresponding hop ID.

[0066] Optionally, a relationship between different downlink reference signal resources in the same downlink reference signal resource set satisfies at least one of the following:

[0067] 1) The different downlink reference signal resources are respectively configured with starting resource blocks (RBs) and / or bandwidths.

[0068] For example, a plurality of CSI-RS resources are respectively configured with a starting RB and / or a bandwidth. For example, the bandwidth configured for the plurality of CSI-RS resources is the same.

[0069] 2) There is overlapping bandwidth between adjacent downlink reference signal resources in the frequency domain and / or time domain.

[0070] For example, there is overlapping bandwidth between adjacent CSI-RS resources in the frequency domain and / or time domain. For example, the overlapping bandwidth between adjacent CSI-RS resources in the frequency domain and / or time domain is equal.

[0071] 3) The different downlink reference signal resources have the same number of ports, and the ports with the same port index of the different downlink reference signal resources are the same port.

[0072] For example, multiple CSI-RS resources have the same number of ports, and ports with the same port index on different CSI-RS resources are the same port. Optionally, CDM groups with the same CDM group index on different CSI-RS resources, which have the same code division multiplexing (CDM) type and the same CDM group size, belong to the same CDM group.

[0073] 4) The power control offsets of the different downlink reference signal resources are the same.

[0074] For example, the power control offsets of multiple CSI-RS resources are the same. In other words, the transmission power of different downlink reference signal resources is the same.

[0075] 5) The quasi co-location (QCL) of the different downlink reference signal resources is the same.

[0076] For example, the QCL of multiple CSI-RS resources is the same, for example: multiple CSI-RS resources are sent from the same beam or spatial filter; or multiple CSI-RS resources all use the first CSI-RS resource as the QCL source reference signal (QCL source RS).

[0077] 6) The frequency domain allocation parameters within the RB of the different downlink reference signal resources are the same.

[0078] For example, the frequency domain allocation parameters within an RB of multiple CSI-RS resources are the same.

[0079] 7) The frequency domain densities of the different downlink reference signal resources are the same.

[0080] For example, the frequency domain densities of multiple CSI-RS resources are the same.

[0081] 8) The CDM types of the different downlink reference signal resources are the same.

[0082] For example, the CDM type of multiple CSI-RS resources is the same.

[0083] 9) The scrambling code IDs of the different downlink reference signal resources are the same.

[0084] For example, the scrambling code IDs of multiple CSI-RS resources are the same.

[0085] Optionally, for a downlink reference signal resource set, the network configures 'repetition on', indicating that different downlink reference signal resources are sent from the same beam.

[0086] For example, if the CSI-RS resource set is configured as 'frequency hopping' and 'repetition on', the terminal receives different CSI-RS resources using the same receive beam (Rx beam); otherwise, there is no such assumption.

[0087] Implementation method 2: at least one target hop of a downlink reference signal is associated with two or more downlink reference signal resources in a downlink reference signal resource set.

[0088] For example, M>N, that is, M CSI-RS resources in a CSI-RS resource set correspond to N hops, and there is a case where one hop is associated with at least two CSI-RS resources.

[0089] Optionally, different hops are associated with the same number of downlink reference signal resources.

[0090] Optionally, in a case where at least one downlink reference signal resource among the two or more downlink reference signal resources includes all downlink reference signal ports, each downlink reference signal resource in the downlink reference signal resource set is respectively configured with or associated with a corresponding hop.

[0091] For example, one CSI-RS resource includes all CSI-RS ports. For example, if the total number of CSI-RS ports is 32, the number of CSI-RS ports included in each CSI-RS resource is also 32. Each CSI-RS resource is configured or associated with a corresponding hop.

[0092] It should be noted that each downlink reference signal resource is respectively configured with or associated with a corresponding hop, which can be understood as each downlink reference signal resource is respectively configured with or associated with a corresponding hop ID.

[0093] Optionally, the number of CSI-RS resources associated with different hop IDs is the same, or the number of CSI-RS resources associated with different hops is the same.

[0094] Furthermore, multiple downlink reference signal resources associated with the same hop meet at least one of the following conditions:

[0095] 1) The starting physical resource blocks (PRBs) are the same.

[0096] For example, multiple CSI-RS resources associated with the same hop ID have the same starting PRB.

[0097] 2) The number of RBs is the same.

[0098] For example, multiple CSI-RS resources associated with the same hop ID have the same number of RBs.

[0099] 3) The frequency domain density is the same.

[0100] For example, multiple CSI-RS resources associated with the same hop ID have the same frequency domain density.

[0101] 4) The number of ports of downlink reference signal resources is the same.

[0102] For example, multiple CSI-RS resources associated with the same hop ID have the same number of ports.

[0103] 5) The CDM type is the same.

[0104] For example, multiple CSI-RS resources associated with the same hop ID have the same CDM type.

[0105] 6) The power control offset is the same.

[0106] In other words, different downlink reference signal resources have the same transmission power.

[0107] Optionally, at least one first downlink reference signal resource among the different downlink reference signal resources has a first association relationship. The first downlink reference signal resource is a downlink reference signal resource specific between different hops. For example, the first downlink reference signal resource is a first CSI-RS resource, and the first CSI-RS resource is a CSI-RS resource specific between different hops.

[0108] The at least one first downlink reference signal resource having the first association relationship may be determined in at least one of the following ways:

[0109] Mode a: sort multiple downlink reference signal resources associated with the same hop by time, and determine the at least one first downlink reference signal resource based on the multiple downlink reference signal resources in the same time domain order.

[0110] It should be noted that, multiple downlink reference signal resources associated with the same hop can be understood as multiple downlink reference signal resources associated with the same hop ID.

[0111] For example, multiple CSI-RS resources associated with the same hop ID are sorted by time; multiple CSI-RS resources in the same time domain sequence have a first association relationship.

[0112] Mode b: multiple downlink reference signal resources associated with the same hop form a downlink reference signal resource list, and determine the at least one first downlink reference signal resource based on downlink reference signal resources of the same entry in the downlink reference signal resource lists corresponding to different hops.

[0113] For example, each hop is configured with a CSI-RS resource list, and CSI-RS resources corresponding to the same entry in the CSI-RS resource lists corresponding to different hops have a first association relationship.

[0114] Mode c: explicitly configuring the at least one first downlink reference signal resource having the first association relationship as a set.

[0115] For example, the CSI-RS resources (or CSI-RS resource IDs) with the first association relationship are configured to be divided into a group, which is divided into multiple groups. Each group includes X1 CSI-RS resources, where X1 is a positive integer.

[0116] Optionally, the first association relationship satisfies at least one of the following:

[0117] 1) The at least one first downlink reference signal resource may be used for downlink reference signal resource joint processing to obtain CSI.

[0118] 2) The at least one first downlink reference signal resource has the same number of ports, and ports with the same port index of different first downlink reference signal resources are the same port.

[0119] 3) The QCL of the at least one first downlink reference signal resource is the same.

[0120] 4) There is overlapping bandwidth between adjacent first downlink reference signal resources in the frequency domain and / or time domain.

[0121] 5) The power control offset of the at least one first downlink reference signal resource is the same.

[0122] 6) The frequency domain allocation parameters within the RB of the at least one first downlink reference signal resource are the same.

[0123] 7) The frequency domain density of the at least one first downlink reference signal resource is the same.

[0124] 8) The scrambling code ID of the at least one first downlink reference signal resource is the same.

[0125] Optionally, for a downlink reference signal resource set, the network configures 'repetition on / off'. Repetition on / off is applied to multiple downlink reference signal resources with the same hop ID, indicating that the different downlink reference signal resources are sent from the same beam, or there is no assumption that the different downlink reference signal resources are sent from the same beam.

[0126] Optionally, for a downlink reference signal resource set, the network configures 'trsinfo', which is applied to multiple downlink reference signal resources with the same hop ID, indicating that the multiple downlink reference signal resources are used for TRS function.

[0127] Optionally, when one of the two or more downlink reference signal resources includes part of the downlink reference signal ports, and multiple downlink reference signal resources among the two or more downlink reference signal resources constitute all the downlink reference signal ports, each downlink reference signal resource group is respectively configured or associated with a corresponding hop, wherein the multiple downlink reference signal resources included in each downlink reference signal resource group constitute all the downlink reference signal ports.

[0128] For example, one CSI-RS resource contains a portion of the CSI-RS ports, and multiple CSI-RS resources make up all the CSI-RS ports. For example, if the total number of CSI-RS ports is 128, each CSI-RS resource also contains 32 CSI-RS ports, and four CSI-RS resources make up all the CSI-RS ports. Each CSI-RS group includes multiple CSI-RS ports that make up the total number of CSI-RS ports. Each CSI-RS group is configured or associated with a corresponding hop.

[0129] It should be noted that each downlink reference signal resource group is respectively configured or associated with a corresponding hop, which can be understood as each downlink reference signal resource group is respectively configured or associated with a corresponding hop ID.

[0130] Optionally, at least one second downlink reference signal resource group among the different downlink reference signal resources has a second association relationship. A plurality of second downlink reference signal resource groups having the second association relationship are linked downlink reference signal resource groups (linked resource groups).

[0131] Optionally, the at least one second downlink reference signal resource group having the second association relationship is determined by at least one of the following methods:

[0132] Mode a: sort multiple downlink reference signal resource groups associated with the same hop by time, and determine the at least one second downlink reference signal resource group based on multiple downlink reference signal resource groups in the same time domain order.

[0133] For example, multiple CSI-RS groups associated with the same hop ID are sorted by time; multiple CSI-RS groups in the same time domain sequence have a second association relationship.

[0134] Mode b: multiple downlink reference signal resource groups associated with the same hop form a downlink reference signal resource group list, and determine the at least one second downlink reference signal resource group according to the downlink reference signal resource groups with the same entry in the downlink reference signal resource group list corresponding to different hops.

[0135] For example, each hop is configured with a CSI-RS resource group list, and CSI-RS resource groups corresponding to the same entry in resource group lists corresponding to different hops have a second association relationship.

[0136] Mode c: explicitly configuring the at least one second downlink reference signal resource group having the second association relationship as a set.

[0137] For example, the CSI-RS resource groups (or CSI-RS resource group IDs) with the second association relationship are configured to be grouped into a group, and then divided into multiple groups, each group having X2 CSI-RS resource groups, where X2 is a positive integer.

[0138] Optionally, the second association relationship satisfies at least one of the following:

[0139] 1) The at least one second downlink reference signal resource group may be used for downlink reference signal resource joint processing to obtain CSI;

[0140] 2) the at least one second downlink reference signal resource group has the same number of ports, and ports with the same port index in different second downlink reference signal resource groups are the same port;

[0141] 3) the at least one second downlink reference signal resource group has the same number of downlink reference signal resources;

[0142] 4) There is overlapping bandwidth between adjacent second downlink reference signal resource groups in the frequency domain and / or time domain.

[0143] Optionally, for implementation 1 and / or implementation 2, the terminal ignores or does not expect to configure 'repetition' and / or 'trs-info'. For a downlink reference signal resource set, the network configures an identifier to identify that the downlink reference signal resources in the downlink reference signal resource set are used for 'frequency hopping'.

[0144] Optionally, the downlink reference signal transmission method provided in the embodiment of the present application further includes any one of the following:

[0145] 1) The terminal receives first indication information sent by the network side device, wherein the first indication information is used to indicate trigger offsets corresponding to different downlink reference signal resources in the downlink reference signal resource set in the case of non-periodic downlink reference signal frequency hopping.

[0146] For example, for aperiodic CSI-RS frequency hopping, the network configures the trigger offsets corresponding to the multiple CSI-RS resources in a CSI-RS resource set, thus allowing aperiodic transmission from different slots for multiple hops.

[0147] Optionally, the network configures a trigger offset for each CSI-RS resource separately, or the network configures the trigger offset of the first CSI-RS resource in the CSI-RS resource set and the relative trigger offsets of other CSI-RS resources relative to the first CSI-RS resource.

[0148] 2) The terminal receives second indication information sent by the network side device, wherein the second indication information is used to activate or deactivate downlink reference signal frequency hopping.

[0149] For example, for semi-persistent CSI-RS frequency hopping, a Medium Access Control (MAC) Control Element (CE) is used to activate / deactivate CSI-RS frequency hopping for semi-persistent CSI-RS transmission. For example, a reserved bit (1 bit) in the MAC CE is used to indicate that the MAC CE is used for CSI-RS frequency hopping.

[0150] Optionally, the second indication information includes at least one of the following:

[0151] (1) Downlink reference signal frequency hopping flag;

[0152] (2) Serving cell identification;

[0153] (3) BWP identifier. The BWP identifier is the BWP where the downlink reference signal is located. If the terminal measures a downlink reference signal outside the activated BWP, the BWP identifier may be a virtual BWP; or, the second indication information does not include the BWP identifier, or the BWP identifier is omitted.

[0154] (4) an identifier of the downlink reference signal resource set;

[0155] (5) A transmission configuration indication (TCI state) identifier corresponding to the downlink reference signal resource in the downlink reference signal resource set.

[0156] Optionally, for implementation manner 1, the TCI states corresponding to the different downlink reference signal resources are the same; or, the second indication information indicates only one TCI state, and the different downlink reference signal resources share the same TCI state.

[0157] For example, considering that the TCI states of multiple CSI-RS resources in a CSI-RS resource set are the same, the TCI state in the MAC CE indicates only one (e.g., only TCI state ID0). Alternatively, the TCI states corresponding to multiple CSI-RS resources in the MAC CE are the same.

[0158] Optionally, for implementation manner 2, the number of TCI states is the same as the number of downlink reference signal resources associated with one hop, and different TCI states correspond one-to-one to different downlink reference signal resources within one hop.

[0159] For example, the MAC CE may contain N TCI state indications, each representing the TCI state of N CSI-RS resources with the same hop ID. The hop (hop ID) of the N CSI-RS resources can be indicated in the MAC CE, or indicated by the RRC, or a default hop agreed upon by the protocol, or any hop. For CSI-RS resources with the same TCI state on different hops, the TCI state can be determined by referring to the TCI state of the associated target CSI-RS resource.

[0160] Optionally, the downlink reference signal transmission method provided in the embodiment of the present application further includes:

[0161] In the process of the terminal reporting the CSI to the network-side device, the terminal reports the downlink reference signal resource ID and / or the downlink reference signal resource set ID corresponding to the CSI.

[0162] For example, the terminal jointly processes the CSI-RS resources in the CSI-RS resource set, and reports the CSI, and reports the CSI-RS resource ID (CSI-RS resource ID) and / or CSI-RS resource set ID (CSI-RS resource set ID) associated with the CSI.

[0163] For example, the terminal jointly processes CSI-RS resources with an associated relationship and reports only one of the CSI-RS resource IDs to identify the CSI as the jointly processed CSI.

[0164] For another example, the terminal jointly processes CSI-RS resources with an associated relationship, reports the CSI-RS resource ID actually used, and identifies the CSI as jointly processed CSI.

[0165] Solution 2: Different hops of the downlink reference signal are on downlink reference signal resources in different downlink reference signal resource sets.

[0166] For example, different CSI-RS resources are CSI-RS resources within different CSI-RS resource sets, that is, multiple hops of the CSI-RS are respectively configured or mapped in different CSI-RS resource sets. Different hops correspond to different CSI-RS resource sets. Optionally, each downlink reference signal resource set in the different downlink reference signal resource sets is respectively configured or associated with its own hop ID. Different CSI-RS resource sets represent different hops. Optionally, the number of CSI-RS resources within different CSI-RS resource sets is the same. Figure 4 is a schematic diagram of different CSI-RS resource sets corresponding to different hops provided in an embodiment of the present application.

[0167] For example, the network configures multiple CSI-RS resource sets within a single CSI-RS resource configuration, each corresponding to a different hop. These multiple CSI-RS resource sets form a CSI-RS resource set list or CSI-RS resource set group for hops. Multiple CSI-RS resource sets used for frequency hopping are referred to as linked CSI-RS resource sets.

[0168] Optionally, a relationship between multiple downlink reference signal resources in each downlink reference signal resource set among the different downlink reference signal resource sets satisfies at least one of the following:

[0169] 1) The starting PRB is the same;

[0170] 2) The number of RBs is the same;

[0171] 3) The frequency domain density is the same;

[0172] 4) The number of downlink reference signal ports is the same;

[0173] 5) The CDM type is the same.

[0174] Optionally, at least one third downlink reference signal resource in the different downlink reference signal resource sets has a third association relationship. The at least one third downlink reference signal resource with the third association relationship is determined by at least one of the following methods:

[0175] Mode a: sort multiple downlink reference signal resources in a downlink reference signal resource set by time, and determine the at least one third downlink reference signal resource based on multiple downlink reference signal resources in the same time domain order in different downlink reference signal resource sets.

[0176] For example, multiple CSI-RS resources in a CSI-RS resource set are sorted by time; multiple CSI-RS resources in the same time domain order have a third association relationship.

[0177] Mode b: determining the at least one third downlink reference signal resource according to downlink reference signal resources of the same resource entry in different downlink reference signal resource sets.

[0178] For example, CSI-RS resources corresponding to the same entry in a CSI-RS resource set have a third association relationship.

[0179] Mode c: Determine the at least one third downlink reference signal resource using multiple downlink reference signal resources with the same resource identifier in different downlink reference signal resource sets.

[0180] For example, multiple CSI-RS resources with the same resource identifier in a CSI-RS resource set have a third association relationship.

[0181] Mode d: explicitly configure at least one third downlink reference signal resource having a third association relationship as a set.

[0182] For example, the CSI-RS resources (or CSI-RS resource IDs) configured with the third association relationship are divided into one group, which is divided into multiple groups. Each group includes X3 CSI-RS resources, where X3 is a positive integer.

[0183] Optionally, the third association relationship satisfies at least one of the following:

[0184] 1) The at least one third downlink reference signal resource may be used for downlink reference signal resource joint processing to obtain CSI.

[0185] 2) The at least one third downlink reference signal resource has the same number of ports, and the ports with the same port index are the same port.

[0186] 3) The QCL of the at least one third downlink reference signal resource is the same.

[0187] 4) There is overlapping bandwidth between adjacent third downlink reference signal resources in the frequency domain and / or time domain.

[0188] 5) The power control offset of the at least one third downlink reference signal resource is the same.

[0189] 6) The frequency domain allocation parameters within the RB of the at least one third downlink reference signal resource are the same;

[0190] 7) The frequency domain density of the at least one third downlink reference signal resource is the same.

[0191] 8) The scrambling code ID of the at least one third downlink reference signal resource is the same.

[0192] 9) The CDM type of the at least one third downlink reference signal resource is the same.

[0193] Optionally, for each downlink reference signal resource set, the terminal ignores or does not expect to configure 'repetition' and / or 'trs-info'.

[0194] Optionally, for each downlink reference signal resource set, the network configures a specific identifier for identifying that the downlink reference signal resources in the downlink reference signal resource set are used for 'frequency hopping'.

[0195] Optionally, the downlink reference signal transmission method provided in the embodiment of the present application further includes any one of the following:

[0196] 1) The terminal receives third indication information sent by the network-side device, wherein the third indication information is used to trigger multiple downlink reference signal resource sets for downlink reference signal frequency hopping.

[0197] For example, for aperiodic CSI-RS frequency hopping, for aperiodic CSI-RS transmission, the network configures 'trigger offsets' corresponding to multiple resources in a CSI-RS resource set.

[0198] Optionally, the network configures a trigger offset for each CSI-RS resource separately, or the network configures the trigger offset of the first CSI-RS resource in the CSI-RS resource set and the relative trigger offsets of other CSI-RS resources relative to the first CSI-RS resource.

[0199] Optionally, for aperiodic CSI-RS transmission, the network configuration 'CSI-AssociatedReportConfigInfo' includes multiple CSI-RS resource sets for CSI-RS frequency hopping.

[0200] Optionally, for aperiodic CSI-RS transmission, DCI is used to trigger CSI-RS frequency hopping. Since 'CSI-AssociatedReportConfigInfo' contains multiple CSI-RS resource sets, the transmission of multiple CSI-RS resource sets is triggered at one time, corresponding to multiple hops.

[0201] 2) The terminal receives fourth indication information sent by the network side device, wherein the fourth indication information is used to activate or deactivate downlink reference signal frequency hopping.

[0202] Optionally, the fourth indication information includes at least one of the following:

[0203] (1) Downlink reference signal frequency hopping flag;

[0204] (2) Serving cell identification;

[0205] (3) BWP logo;

[0206] (4) identification of the downlink reference signal resource set;

[0207] (5) The TCI state identifier corresponding to the downlink reference signal resource in the downlink reference signal resource set.

[0208] For example, for semi-persistent CSI-RS frequency hopping, the network includes multiple CSI-RS resource sets within a single CSI-RS resource configuration for CSI-RS frequency hopping. For semi-persistent CSI-RS transmission, CSI-RS frequency hopping is activated / deactivated using a MAC CE. For example, the reserved bit '1 bit' in the MAC CE indicates that the MAC CE is used for CSI-RS frequency hopping.

[0209] Optionally, the method of using MAC CE to activate / deactivate CSI-RS frequency hopping may include at least one of the following:

[0210] (1) The MAC CE contains at least one CSI-RS resource set that is activated / deactivated;

[0211] (2) The MAC CE includes a CSI-RS resource set for activation / deactivation. By indicating a CSI-RS resource set, all CSI-RS resource sets used for frequency hopping are activated by default. For example, the network configuration 'indicator' enables the function of activating / deactivating CSI-RS frequency hopping; when 'indicator' is 1, the function is enabled; when 'indicator' is 0, the function is not enabled, that is, only the CSI-RS resource set indicated in the MAC CE is activated / deactivated.

[0212] Optionally, if multiple CSI-RS resource sets are activated, and considering that the corresponding CSI-RS resources in different CSI-RS resource sets are associated, the TCI states of multiple associated CSI-RS resources are represented by a single TCI state ID. For example, TCI State ID 0 indicates the first CSI-RS resource in all activated CSI-RS resource sets.

[0213] Optionally, for implementation method 1, there are multiple identifiers of the downlink reference signal resource set, which correspond one-to-one to different downlink reference signal resource sets; or, there is one identifier of the downlink reference signal resource set, and the one downlink reference signal resource set identifier is used by the terminal to activate all downlink reference signal resource sets for frequency hopping.

[0214] Optionally, for implementation mode 2, the TCI state corresponds one-to-one to multiple downlink reference signal resources in a downlink reference signal resource set. That is, by indicating the TCI states of multiple downlink reference signal resources in a downlink reference signal resource set, the TCI states of the associated downlink reference signal resources in the associated downlink reference signal resource set can also be obtained.

[0215] Optionally, the downlink reference signal transmission method provided in the embodiment of the present application further includes:

[0216] In the process of the terminal reporting the CSI to the network-side device, the terminal reports the downlink reference signal resource ID and / or the downlink reference signal resource set ID corresponding to the CSI.

[0217] For example, the terminal jointly processes CSI-RS resources in multiple CSI-RS resource sets, and reports CSI, and reports the CSI-RS resource set ID and / or CSI-RS resource ID associated with the CSI.

[0218] For example, for CSI-RS resource sets / resources that are associated with each other and are jointly processed, the terminal only reports one of the CSI-RS resource set IDs and / or CSI-RS resource IDs to identify the CSI as the jointly processed CSI.

[0219] For another example, the terminal jointly processes associated CSI-RS resources, reports the CSI-RS resource set ID and / or CSI-RS resource ID actually used, and identifies the CSI as jointly processed CSI.

[0220] FIG5 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 FIG5 , the method includes steps 501 to 502:

[0221] Step 501: A network-side device sends a downlink reference signal to a terminal in a frequency hopping manner, where different hops of the downlink reference signal are mapped to different downlink reference signal resources.

[0222] Optionally, the network side device sends a downlink reference signal to the terminal in a frequency hopping manner, and different hops of the downlink reference signal are mapped to different downlink reference signal resources. It should be noted that the downlink reference signal is used to measure channel state information, and the downlink reference signal is, for example, CSI-RS.

[0223] Step 502: The network-side device receives channel state information CSI reported by the terminal, where the CSI is obtained by the terminal performing joint processing on the downlink reference signals on downlink reference signal resources corresponding to different hops.

[0224] For example, the network device transmits CSI-RS to the terminal using frequency hopping. Different hops of the CSI-RS (i.e., multiple hops of the CSI-RS) are mapped or configured on different CSI-RS resources. The terminal receives the CSI-RS transmitted by the network device using frequency hopping. The terminal jointly processes the CSI-RS resources corresponding to the different hops of the CSI-RS to obtain CSI and reports the CSI to the network device.

[0225] In an embodiment of the present application, a network-side device sends a downlink reference signal to a terminal through a frequency hopping manner. Different hops of the downlink reference signal are mapped to different downlink reference signal resources. After the terminal receives the downlink reference signal sent by the network-side device through a frequency hopping manner, the terminal jointly processes the downlink reference signal on the downlink reference signal resources corresponding to different hops, obtains CSI, and reports it to the network-side device, so that the terminal can process a large-bandwidth downlink reference signal, and the channel state information reporting overhead is small.

[0226] Optionally, mapping different hops of the downlink reference signal to different downlink reference signal resources respectively includes:

[0227] The different hops of the downlink reference signal are respectively on different downlink reference signal resources in the same downlink reference signal resource set.

[0228] Optionally, different hops of the downlink reference signal correspond one-to-one to different downlink reference signal resources in the downlink reference signal resource set.

[0229] Optionally, a relationship between different downlink reference signal resources in the same downlink reference signal resource set satisfies at least one of the following:

[0230] The different downlink reference signal resources are respectively configured with starting resource blocks RB and / or bandwidths;

[0231] There is overlapping bandwidth between adjacent downlink reference signal resources in the frequency domain and / or time domain;

[0232] The number of ports of the different downlink reference signal resources is the same, and the ports of the different downlink reference signal resources with the same port index are the same port;

[0233] The power control offsets of the different downlink reference signal resources are the same;

[0234] The quasi-co-site QCLs of the different downlink reference signal resources are the same;

[0235] The different downlink reference signal resources have the same frequency domain allocation parameters within the RB;

[0236] The frequency domain densities of the different downlink reference signal resources are the same;

[0237] The different downlink reference signal resources have the same code division multiplexing (CDM) type;

[0238] The different downlink reference signal resources have the same scrambling code ID.

[0239] Optionally, each downlink reference signal resource in the different downlink reference signal resources is respectively configured with or associated with its own hop identification ID.

[0240] Optionally, at least one target hop of the downlink reference signal is associated with two or more downlink reference signal resources in the downlink reference signal resource set.

[0241] Optionally, in a case where at least one downlink reference signal resource among the two or more downlink reference signal resources includes all downlink reference signal ports, each downlink reference signal resource in the downlink reference signal resource set is respectively configured with or associated with a corresponding hop.

[0242] Optionally, multiple downlink reference signal resources associated with the same hop meet at least one of the following conditions:

[0243] The starting physical resource block PRB is the same;

[0244] The number of RBs is the same;

[0245] The frequency domain density is the same;

[0246] The number of ports of downlink reference signal resources is the same;

[0247] The CDM type is the same;

[0248] The power control offset is the same.

[0249] Optionally, at least one first downlink reference signal resource among the different downlink reference signal resources has a first association relationship, wherein the at least one first downlink reference signal resource is determined in at least one of the following ways:

[0250] sorting multiple downlink reference signal resources associated with the same hop in time, and determining the at least one first downlink reference signal resource based on the multiple downlink reference signal resources in the same time domain order;

[0251] Associating multiple downlink reference signal resources with the same hop to form a downlink reference signal resource list, and determining the at least one first downlink reference signal resource according to downlink reference signal resources with the same entry in the downlink reference signal resource lists corresponding to different hops;

[0252] The at least one first downlink reference signal resource having the first association relationship is explicitly configured as a set.

[0253] Optionally, the first association relationship satisfies at least one of the following:

[0254] The at least one first downlink reference signal resource may be used for downlink reference signal resource joint processing to obtain CSI;

[0255] The at least one first downlink reference signal resource has the same number of ports, and ports with the same port index of different first downlink reference signal resources are the same port;

[0256] The QCL of the at least one first downlink reference signal resource is the same;

[0257] There is overlapping bandwidth between adjacent first downlink reference signal resources in the frequency domain and / or time domain;

[0258] The power control offset of the at least one first downlink reference signal resource is the same;

[0259] The at least one first downlink reference signal resource has the same frequency domain allocation parameter within the RB;

[0260] The frequency domain density of the at least one first downlink reference signal resource is the same;

[0261] The scrambling code ID of the at least one first downlink reference signal resource is the same.

[0262] Optionally, when one of the two or more downlink reference signal resources includes part of the downlink reference signal ports, and multiple downlink reference signal resources among the two or more downlink reference signal resources constitute all the downlink reference signal ports, each downlink reference signal resource group is respectively configured or associated with a corresponding hop, wherein the multiple downlink reference signal resources included in each downlink reference signal resource group constitute all the downlink reference signal ports.

[0263] Optionally, at least one second downlink reference signal resource group among the different downlink reference signal resources has a second association relationship, and the at least one second downlink reference signal resource group is determined in at least one of the following ways:

[0264] sorting multiple downlink reference signal resource groups associated with the same hop in time, and determining the at least one second downlink reference signal resource group based on the multiple downlink reference signal resource groups in the same time domain order;

[0265] A plurality of downlink reference signal resource groups associated with the same hop form a downlink reference signal resource group list, and the at least one second downlink reference signal resource group is determined according to downlink reference signal resource groups with the same entry in the downlink reference signal resource group lists corresponding to different hops;

[0266] The at least one second downlink reference signal resource group having the second association relationship is explicitly configured as a set.

[0267] Optionally, the second association relationship satisfies at least one of the following:

[0268] The at least one second downlink reference signal resource group may be used for downlink reference signal resource joint processing to obtain CSI;

[0269] The at least one second downlink reference signal resource group has the same number of ports, and ports with the same port index in different second downlink reference signal resource groups are the same port;

[0270] The at least one second downlink reference signal resource group has the same number of downlink reference signal resources;

[0271] There is overlapping bandwidth between adjacent second downlink reference signal resource groups in the frequency domain and / or time domain.

[0272] Optionally, the method further includes any of the following:

[0273] The network-side device sends first indication information to the terminal, wherein the first indication information is used to indicate trigger offsets corresponding to different downlink reference signal resources in the downlink reference signal resource set in the case of aperiodic downlink reference signal frequency hopping;

[0274] The network-side device sends second indication information to the terminal, where the second indication information is used to activate or deactivate downlink reference signal frequency hopping.

[0275] Optionally, the second indication information includes at least one of the following:

[0276] Downlink reference signal frequency hopping flag;

[0277] Serving cell identifier;

[0278] BWP logo;

[0279] an identifier of the downlink reference signal resource set;

[0280] A transmission configuration indication TCI state identifier corresponding to the downlink reference signal resource in the downlink reference signal resource set.

[0281] Optionally, the TCI states corresponding to the different downlink reference signal resources are the same; or, the second indication information indicates only one TCI state, and the different downlink reference signal resources share the same TCI state.

[0282] Optionally, the number of TCI states is the same as the number of downlink reference signal resources associated with one hop, and different TCI states correspond one-to-one to different downlink reference signal resources within one hop.

[0283] Optionally, mapping different hops of the downlink reference signal to different downlink reference signal resources respectively includes:

[0284] The different hops of the downlink reference signal are respectively on downlink reference signal resources in different downlink reference signal resource sets.

[0285] Optionally, each downlink reference signal resource set in the different downlink reference signal resource sets is respectively configured with or associated with its own hop ID.

[0286] Optionally, the relationship between multiple downlink reference signal resources in each downlink reference signal resource set in the different downlink reference signal resource sets satisfies at least one of the following: the same starting PRB; the same number of RBs; the same frequency domain density; the same number of downlink reference signal ports; and the same CDM type.

[0287] Optionally, at least one third downlink reference signal resource in the different downlink reference signal resource sets has a third association relationship, wherein the at least one third downlink reference signal resource is determined in at least one of the following ways:

[0288] sorting the multiple downlink reference signal resources in the downlink reference signal resource set in time, and determining the at least one third downlink reference signal resource based on the multiple downlink reference signal resources in the same time domain order;

[0289] determining the at least one third downlink reference signal resource according to downlink reference signal resources of the same resource entry in the downlink reference signal resource set;

[0290] Determine the at least one third downlink reference signal resource from a plurality of downlink reference signal resources having the same resource identifier in the downlink reference signal resource set;

[0291] At least one third downlink reference signal resource having a third association relationship is explicitly configured as a set.

[0292] Optionally, the third association relationship satisfies at least one of the following:

[0293] The at least one third downlink reference signal resource may be used for downlink reference signal resource joint processing to obtain CSI;

[0294] The at least one third downlink reference signal resource has the same number of ports, and the ports with the same port index are the same port;

[0295] The QCL of the at least one third downlink reference signal resource is the same;

[0296] There is overlapping bandwidth between adjacent third downlink reference signal resources in the frequency domain and / or time domain;

[0297] The power control offset of the at least one third downlink reference signal resource is the same;

[0298] The at least one third downlink reference signal resource has the same frequency domain allocation parameter within the RB;

[0299] The frequency domain density of the at least one third downlink reference signal resource is the same;

[0300] The scrambling code ID of the at least one third downlink reference signal resource is the same;

[0301] The at least one third downlink reference signal resource has the same CDM type.

[0302] Optionally, the method further includes any of the following:

[0303] The network-side device sends third indication information to the terminal, wherein the third indication information is used to trigger multiple downlink reference signal resource sets for downlink reference signal frequency hopping;

[0304] The network-side device sends fourth indication information to the terminal, where the fourth indication information is used to activate or deactivate downlink reference signal frequency hopping.

[0305] Optionally, the fourth indication information includes at least one of the following:

[0306] Downlink reference signal frequency hopping flag;

[0307] Serving cell identifier;

[0308] BWP logo;

[0309] an identifier of a downlink reference signal resource set;

[0310] The TCI state identifier corresponding to the downlink reference signal resource in the downlink reference signal resource set.

[0311] Optionally, there are multiple identifiers of the downlink reference signal resource set, corresponding one-to-one to different downlink reference signal resource sets;

[0312] Alternatively, the number of the downlink reference signal resource set identifier is one, and the one downlink reference signal resource set identifier is used by the terminal to activate all downlink reference signal resource sets for frequency hopping.

[0313] Optionally, the TCI state corresponds one-to-one to multiple downlink reference signal resources in a downlink reference signal resource set.

[0314] Optionally, the method further includes: the network side device receiving a downlink reference signal resource ID and / or a downlink reference signal resource set ID corresponding to the CSI reported by the terminal.

[0315] For example, the network-side device receives the CSI reported by the terminal, and the downlink reference signal resource ID and / or the downlink reference signal resource set ID corresponding to the CSI.

[0316] FIG6 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 device in cooperation. As shown in FIG6 , the method includes steps 601 to 603:

[0317] Step 601: The network-side device sends a downlink reference signal to the terminal in a frequency hopping manner, where different hops of the downlink reference signal are mapped to different downlink reference signal resources.

[0318] Step 602: The terminal receives a downlink reference signal sent by a network-side device in a frequency hopping manner; the terminal jointly processes the downlink reference signals on downlink reference signal resources corresponding to different hops to obtain channel state information CSI.

[0319] Step 603: The terminal reports the CSI to the network-side device; the network-side device receives the CSI reported by the terminal.

[0320] In an embodiment of the present application, a network-side device sends a downlink reference signal to a terminal through a frequency hopping manner, and different hops of the downlink reference signal are mapped to different downlink reference signal resources. After the terminal receives the downlink reference signal sent by the network-side device through the frequency hopping manner, the terminal jointly processes the downlink reference signals on the downlink reference signal resources corresponding to different hops, obtains CSI, and reports it, so that the terminal can process a large-bandwidth downlink reference signal with a small channel state information reporting overhead.

[0321] 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.

[0322] FIG7 is a schematic diagram of a structure of a downlink reference signal transmission device according to an embodiment of the present application. The downlink reference signal transmission device 700 is applied to a terminal. As shown in FIG7 , the downlink reference signal transmission device 700 includes: a first receiving module 701, a processing module 702, and a reporting module 703, wherein:

[0323] The first receiving module 701 is configured to receive a downlink reference signal sent by a network-side device in a frequency hopping manner, where different hops of the downlink reference signal are mapped to different downlink reference signal resources;

[0324] The processing module 702 is configured to jointly process the downlink reference signals on the downlink reference signal resources corresponding to different hops to obtain channel state information CSI;

[0325] The reporting module 703 is configured to report the CSI to the network-side device.

[0326] In an embodiment of the present application, by receiving a downlink reference signal sent by a network-side device in a frequency hopping manner, different hops of the downlink reference signal are mapped to different downlink reference signal resources, and the downlink reference signals on the downlink reference signal resources corresponding to different hops are jointly processed to obtain CSI and report it, so that the terminal can process a downlink reference signal with a large bandwidth, and the channel state information reporting overhead is small.

[0327] Optionally, different hops of the downlink reference signal are mapped to different downlink reference signal resources, including at least one of the following:

[0328] The different hops of the downlink reference signal are respectively on different downlink reference signal resources in the same downlink reference signal resource set;

[0329] The different hops of the downlink reference signal are respectively on downlink reference signal resources in different downlink reference signal resource sets.

[0330] Optionally, different hops of the downlink reference signal correspond one-to-one to different downlink reference signal resources in the downlink reference signal resource set.

[0331] Optionally, a relationship between different downlink reference signal resources in the same downlink reference signal resource set satisfies at least one of the following:

[0332] The different downlink reference signal resources are respectively configured with starting resource blocks RB and / or bandwidths;

[0333] There is overlapping bandwidth between adjacent downlink reference signal resources in the frequency domain and / or time domain;

[0334] The number of ports of the different downlink reference signal resources is the same, and the ports of the different downlink reference signal resources with the same port index are the same port;

[0335] The power control offsets of the different downlink reference signal resources are the same;

[0336] The quasi-co-site QCLs of the different downlink reference signal resources are the same;

[0337] The different downlink reference signal resources have the same frequency domain allocation parameters within the RB;

[0338] The frequency domain densities of the different downlink reference signal resources are the same;

[0339] The different downlink reference signal resources have the same code division multiplexing (CDM) type;

[0340] The different downlink reference signal resources have the same scrambling code ID.

[0341] Optionally, each downlink reference signal resource in the different downlink reference signal resources is respectively configured with or associated with its own hop identification ID.

[0342] Optionally, at least one target hop of the downlink reference signal is associated with two or more downlink reference signal resources in the downlink reference signal resource set.

[0343] Optionally, in a case where at least one downlink reference signal resource among the two or more downlink reference signal resources includes all downlink reference signal ports, each downlink reference signal resource in the downlink reference signal resource set is respectively configured with or associated with a corresponding hop;

[0344] or,

[0345] In a case where one of the two or more downlink reference signal resources includes a portion of downlink reference signal ports, and multiple downlink reference signal resources among the two or more downlink reference signal resources constitute all downlink reference signal ports, each downlink reference signal resource group is respectively configured or associated with a corresponding hop, wherein the multiple downlink reference signal resources included in each downlink reference signal resource group constitute all downlink reference signal ports.

[0346] Optionally, multiple downlink reference signal resources associated with the same hop meet at least one of the following conditions:

[0347] The starting physical resource block PRB is the same;

[0348] The number of RBs is the same;

[0349] The frequency domain density is the same;

[0350] The number of ports of downlink reference signal resources is the same;

[0351] The CDM type is the same;

[0352] The power control offset is the same.

[0353] Optionally, at least one first downlink reference signal resource among the different downlink reference signal resources has a first association relationship, wherein the at least one first downlink reference signal resource is determined in at least one of the following ways:

[0354] sorting multiple downlink reference signal resources associated with the same hop in time, and determining the at least one first downlink reference signal resource based on the multiple downlink reference signal resources in the same time domain order;

[0355] Associating multiple downlink reference signal resources with the same hop to form a downlink reference signal resource list, and determining the at least one first downlink reference signal resource according to downlink reference signal resources with the same entry in the downlink reference signal resource lists corresponding to different hops;

[0356] The at least one first downlink reference signal resource having the first association relationship is explicitly configured as a set.

[0357] Optionally, the first association relationship satisfies at least one of the following:

[0358] The at least one first downlink reference signal resource may be used for downlink reference signal resource joint processing to obtain CSI;

[0359] The at least one first downlink reference signal resource has the same number of ports, and ports with the same port index of different first downlink reference signal resources are the same port;

[0360] The QCL of the at least one first downlink reference signal resource is the same;

[0361] There is overlapping bandwidth between adjacent first downlink reference signal resources in the frequency domain and / or time domain;

[0362] The power control offset of the at least one first downlink reference signal resource is the same;

[0363] The at least one first downlink reference signal resource has the same frequency domain allocation parameter within the RB;

[0364] The frequency domain density of the at least one first downlink reference signal resource is the same;

[0365] The scrambling code ID of the at least one first downlink reference signal resource is the same.

[0366] Optionally, at least one second downlink reference signal resource group among the different downlink reference signal resources has a second association relationship, and the at least one second downlink reference signal resource group is determined in at least one of the following ways:

[0367] sorting multiple downlink reference signal resource groups associated with the same hop in time, and determining the at least one second downlink reference signal resource group based on the multiple downlink reference signal resource groups in the same time domain order;

[0368] A plurality of downlink reference signal resource groups associated with the same hop form a downlink reference signal resource group list, and the at least one second downlink reference signal resource group is determined according to downlink reference signal resource groups with the same entry in the downlink reference signal resource group lists corresponding to different hops;

[0369] The at least one second downlink reference signal resource group having the second association relationship is explicitly configured as a set.

[0370] Optionally, the second association relationship satisfies at least one of the following:

[0371] The at least one second downlink reference signal resource group may be used for downlink reference signal resource joint processing to obtain CSI;

[0372] The at least one second downlink reference signal resource group has the same number of ports, and ports with the same port index in different second downlink reference signal resource groups are the same port;

[0373] The at least one second downlink reference signal resource group has the same number of downlink reference signal resources;

[0374] There is overlapping bandwidth between adjacent second downlink reference signal resource groups in the frequency domain and / or time domain.

[0375] Optionally, the first receiving module 701 is further configured to:

[0376] receiving first indication information sent by the network side device, wherein the first indication information is used to indicate trigger offsets corresponding to different downlink reference signal resources in the downlink reference signal resource set in the case of aperiodic downlink reference signal frequency hopping;

[0377] Receive second indication information sent by the network side device, wherein the second indication information is used to activate or deactivate downlink reference signal frequency hopping.

[0378] Optionally, the second indication information includes at least one of the following:

[0379] Downlink reference signal frequency hopping flag;

[0380] Serving cell identifier;

[0381] BWP logo;

[0382] an identifier of the downlink reference signal resource set;

[0383] A transmission configuration indication TCI state identifier corresponding to the downlink reference signal resource in the downlink reference signal resource set.

[0384] Optionally, the TCI states corresponding to the different downlink reference signal resources are the same; or, the second indication information indicates only one TCI state, and the different downlink reference signal resources share the same TCI state.

[0385] Optionally, the number of TCI states is the same as the number of downlink reference signal resources associated with one hop, and different TCI states correspond one-to-one to different downlink reference signal resources within one hop.

[0386] Optionally, mapping different hops of the downlink reference signal to different downlink reference signal resources respectively includes:

[0387] The different hops of the downlink reference signal are respectively on downlink reference signal resources in different downlink reference signal resource sets.

[0388] Optionally, each downlink reference signal resource set in the different downlink reference signal resource sets is respectively configured with or associated with its own hop ID.

[0389] Optionally, the relationship between multiple downlink reference signal resources in each downlink reference signal resource set in the different downlink reference signal resource sets satisfies at least one of the following: the same starting PRB; the same number of RBs; the same frequency domain density; the same number of downlink reference signal ports; and the same CDM type.

[0390] Optionally, at least one third downlink reference signal resource in the different downlink reference signal resource sets has a third association relationship, wherein the at least one third downlink reference signal resource is determined in at least one of the following ways:

[0391] sorting the multiple downlink reference signal resources in the downlink reference signal resource set in time, and determining the at least one third downlink reference signal resource based on the multiple downlink reference signal resources in the same time domain order;

[0392] determining the at least one third downlink reference signal resource according to downlink reference signal resources of the same resource entry in the downlink reference signal resource set;

[0393] Determine the at least one third downlink reference signal resource from a plurality of downlink reference signal resources having the same resource identifier in the downlink reference signal resource set;

[0394] At least one third downlink reference signal resource having a third association relationship is explicitly configured as a set.

[0395] Optionally, the third association relationship satisfies at least one of the following:

[0396] The at least one third downlink reference signal resource may be used for downlink reference signal resource joint processing to obtain CSI;

[0397] The at least one third downlink reference signal resource has the same number of ports, and the ports with the same port index are the same port;

[0398] The QCL of the at least one third downlink reference signal resource is the same;

[0399] There is overlapping bandwidth between adjacent third downlink reference signal resources in the frequency domain and / or time domain;

[0400] The power control offset of the at least one third downlink reference signal resource is the same;

[0401] The at least one third downlink reference signal resource has the same frequency domain allocation parameter within the RB;

[0402] The frequency domain density of the at least one third downlink reference signal resource is the same;

[0403] The scrambling code ID of the at least one third downlink reference signal resource is the same;

[0404] The at least one third downlink reference signal resource has the same CDM type.

[0405] Optionally, the first receiving module 701 is further configured to:

[0406] receiving third indication information sent by the network-side device, wherein the third indication information is used to trigger multiple downlink reference signal resource sets for downlink reference signal frequency hopping;

[0407] Receive fourth indication information sent by the network side device, wherein the fourth indication information is used to activate or deactivate downlink reference signal frequency hopping.

[0408] Optionally, the fourth indication information includes at least one of the following:

[0409] Downlink reference signal frequency hopping flag;

[0410] Serving cell identifier;

[0411] BWP logo;

[0412] an identifier of a downlink reference signal resource set;

[0413] The TCI state identifier corresponding to the downlink reference signal resource in the downlink reference signal resource set.

[0414] Optionally, there are multiple identifiers of the downlink reference signal resource set, corresponding one-to-one to different downlink reference signal resource sets;

[0415] Alternatively, the number of the downlink reference signal resource set identifier is one, and the one downlink reference signal resource set identifier is used by the terminal to activate all downlink reference signal resource sets for frequency hopping.

[0416] Optionally, the TCI state corresponds one-to-one to multiple downlink reference signal resources in a downlink reference signal resource set.

[0417] Optionally, the reporting module 703 is further configured to: in the process of reporting the CSI to the network side device, report the downlink reference signal resource ID and / or the downlink reference signal resource set ID corresponding to the CSI.

[0418] The downlink reference signal transmission apparatus 700 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 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), etc., and are not specifically limited in the embodiment of the present application.

[0419] The downlink reference signal transmission device 700 provided in the embodiment of the present application can implement each process implemented in the method embodiment shown in Figure 2 and achieve the same technical effect. To avoid repetition, it will not be described here.

[0420] FIG8 is a second structural diagram of a downlink reference signal transmission apparatus provided in an embodiment of the present application. The downlink reference signal transmission apparatus 800 is applied to a network-side device. As shown in FIG8 , the downlink reference signal transmission apparatus 800 includes: a sending module 801 and a second receiving module 802, wherein:

[0421] The sending module 801 is configured to send a downlink reference signal to a terminal in a frequency hopping manner, where different hops of the downlink reference signal are mapped to different downlink reference signal resources;

[0422] The second receiving module 802 is configured to receive channel state information CSI reported by the terminal, where the CSI is obtained by the terminal through joint processing of the downlink reference signals on downlink reference signal resources corresponding to different hops.

[0423] In an embodiment of the present application, a downlink reference signal is sent to a terminal through a frequency hopping manner, and different hops of the downlink reference signal are mapped to different downlink reference signal resources. After the terminal receives the downlink reference signal sent by the network side device through the frequency hopping manner, the terminal jointly processes the downlink reference signal on the downlink reference signal resources corresponding to different hops, obtains CSI, and reports it to the network side device, so that the terminal can process a large bandwidth downlink reference signal, and the channel state information reporting overhead is small.

[0424] Optionally, different hops of the downlink reference signal are mapped to different downlink reference signal resources, including at least one of the following:

[0425] The different hops of the downlink reference signal are respectively on different downlink reference signal resources in the same downlink reference signal resource set;

[0426] The different hops of the downlink reference signal are respectively on downlink reference signal resources in different downlink reference signal resource sets.

[0427] Optionally, different hops of the downlink reference signal correspond one-to-one to different downlink reference signal resources in the downlink reference signal resource set.

[0428] Optionally, a relationship between different downlink reference signal resources in the same downlink reference signal resource set satisfies at least one of the following:

[0429] The different downlink reference signal resources are respectively configured with starting resource blocks RB and / or bandwidths;

[0430] There is overlapping bandwidth between adjacent downlink reference signal resources in the frequency domain and / or time domain;

[0431] The number of ports of the different downlink reference signal resources is the same, and the ports of the different downlink reference signal resources with the same port index are the same port;

[0432] The power control offsets of the different downlink reference signal resources are the same;

[0433] The quasi-co-site QCLs of the different downlink reference signal resources are the same;

[0434] The different downlink reference signal resources have the same frequency domain allocation parameters within the RB;

[0435] The frequency domain densities of the different downlink reference signal resources are the same;

[0436] The different downlink reference signal resources have the same code division multiplexing (CDM) type;

[0437] The different downlink reference signal resources have the same scrambling code ID.

[0438] Optionally, at least one target hop of the downlink reference signal is associated with two or more downlink reference signal resources in the downlink reference signal resource set.

[0439] Optionally, in a case where at least one downlink reference signal resource among the two or more downlink reference signal resources includes all downlink reference signal ports, each downlink reference signal resource in the downlink reference signal resource set is respectively configured with or associated with a corresponding hop;

[0440] or,

[0441] In a case where one of the two or more downlink reference signal resources includes a portion of downlink reference signal ports, and multiple downlink reference signal resources among the two or more downlink reference signal resources constitute all downlink reference signal ports, each downlink reference signal resource group is respectively configured or associated with a corresponding hop, wherein the multiple downlink reference signal resources included in each downlink reference signal resource group constitute all downlink reference signal ports.

[0442] Optionally, at least one first downlink reference signal resource among the different downlink reference signal resources has a first association relationship, wherein the at least one first downlink reference signal resource is determined in at least one of the following ways:

[0443] sorting multiple downlink reference signal resources associated with the same hop in time, and determining the at least one first downlink reference signal resource based on the multiple downlink reference signal resources in the same time domain order;

[0444] Associating multiple downlink reference signal resources with the same hop to form a downlink reference signal resource list, and determining the at least one first downlink reference signal resource according to downlink reference signal resources with the same entry in the downlink reference signal resource lists corresponding to different hops;

[0445] The at least one first downlink reference signal resource having the first association relationship is explicitly configured as a set.

[0446] Optionally, when one of the two or more downlink reference signal resources includes part of the downlink reference signal ports, and multiple downlink reference signal resources among the two or more downlink reference signal resources constitute all the downlink reference signal ports, each downlink reference signal resource group is respectively configured or associated with a corresponding hop, wherein the multiple downlink reference signal resources included in each downlink reference signal resource group constitute all the downlink reference signal ports.

[0447] Optionally, at least one second downlink reference signal resource group among the different downlink reference signal resources has a second association relationship, and the at least one second downlink reference signal resource group is determined in at least one of the following ways:

[0448] sorting multiple downlink reference signal resource groups associated with the same hop in time, and determining the at least one second downlink reference signal resource group based on the multiple downlink reference signal resource groups in the same time domain order;

[0449] A plurality of downlink reference signal resource groups associated with the same hop form a downlink reference signal resource group list, and the at least one second downlink reference signal resource group is determined according to downlink reference signal resource groups with the same entry in the downlink reference signal resource group lists corresponding to different hops;

[0450] The at least one second downlink reference signal resource group having the second association relationship is explicitly configured as a set.

[0451] Optionally, the sending module 801 is further configured to:

[0452] Sending first indication information to the terminal, wherein the first indication information is used to indicate trigger offsets corresponding to different downlink reference signal resources in the downlink reference signal resource set in the case of aperiodic downlink reference signal frequency hopping;

[0453] Second indication information is sent to the terminal, where the second indication information is used to activate or deactivate downlink reference signal frequency hopping.

[0454] Optionally, mapping different hops of the downlink reference signal to different downlink reference signal resources respectively includes:

[0455] The different hops of the downlink reference signal are respectively on downlink reference signal resources in different downlink reference signal resource sets.

[0456] Optionally, each downlink reference signal resource set in the different downlink reference signal resource sets is respectively configured with or associated with its own hop ID.

[0457] Optionally, at least one third downlink reference signal resource in the different downlink reference signal resource sets has a third association relationship, wherein the at least one third downlink reference signal resource is determined in at least one of the following ways:

[0458] sorting the multiple downlink reference signal resources in the downlink reference signal resource set in time, and determining the at least one third downlink reference signal resource based on the multiple downlink reference signal resources in the same time domain order;

[0459] determining the at least one third downlink reference signal resource according to downlink reference signal resources of the same resource entry in the downlink reference signal resource set;

[0460] Determine the at least one third downlink reference signal resource from a plurality of downlink reference signal resources having the same resource identifier in the downlink reference signal resource set;

[0461] At least one third downlink reference signal resource having a third association relationship is explicitly configured as a set.

[0462] Optionally, the sending module 801 is further configured to:

[0463] Sending third indication information to the terminal, wherein the third indication information is used to trigger multiple downlink reference signal resource sets for downlink reference signal frequency hopping;

[0464] Sending fourth indication information to the terminal, wherein the fourth indication information is used to activate or deactivate downlink reference signal frequency hopping.

[0465] Optionally, the second receiving module 802 is further configured to: receive a downlink reference signal resource ID and / or a downlink reference signal resource set ID corresponding to the CSI reported by the terminal.

[0466] The downlink reference signal transmission apparatus 800 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.

[0467] The downlink reference signal transmission device 800 provided in the embodiment of the present application can implement each process implemented by the method embodiment shown in Figure 5 and achieve the same technical effect. To avoid repetition, it will not be described here.

[0468] The embodiment of the present application also provides a communication device, and FIG9 is a structural diagram of the communication device provided by the embodiment of the present application. As shown in FIG9 , the embodiment of the present application also provides a communication device 900, including a processor 901 and a memory 902, and the memory 902 stores a program or instruction that can be run on the processor 901. For example, when the communication device 900 is a terminal, the program or instruction is executed by the processor 901 to implement the various steps of the method embodiment shown in FIG2 above, and can achieve the same technical effect. When the communication device 900 is a network side device, the program or instruction is executed by the processor 901 to implement the various steps of the method embodiment shown in FIG5 above, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0469] 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.

[0470] The present application also provides a terminal. Figure 10 is a schematic diagram of the hardware structure of the terminal provided in the present application. As shown in Figure 10, the terminal 1000 includes, but is not limited to, at least some of the components including a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, a user input unit 1007, an interface unit 1008, a memory 1009, and a processor 1010.

[0471] Those skilled in the art will appreciate that the terminal 1000 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 1010 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG10 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.

[0472] It should be understood that in an embodiment of the present application, the input unit 1004 may include a graphics processing unit (GPU) 10041 and a microphone 10042, and the graphics processing unit 10041 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 1006 may include a display panel 10061, and the display panel 10061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1007 includes a touch panel 10071 and at least one of other input devices 10072. The touch panel 10071 is also called a touch screen. The touch panel 10071 may include two parts: a touch detection device and a touch controller. Other input devices 10072 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 an operating stick, which will not be repeated here.

[0473] In the embodiment of the present application, after receiving downlink data from a network-side device, the RF unit 1001 may transmit the data to the processor 1010 for processing. Furthermore, the RF unit 1001 may send uplink data to the network-side device. Typically, the RF unit 1001 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0474] The memory 1009 can be used to store software programs or instructions and various data. The memory 1009 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 1009 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 a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM), and a direct memory bus random access memory (DRRAM). The memory 1009 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0475] Processor 1010 may include one or more processing units. Optionally, processor 1010 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 1010.

[0476] The radio frequency unit 1001 is configured to receive a downlink reference signal sent by a network-side device via a frequency hopping manner, where different hops of the downlink reference signal are mapped to different downlink reference signal resources.

[0477] The processor 1010 is configured to jointly process the downlink reference signals on the downlink reference signal resources corresponding to different hops to obtain channel state information CSI;

[0478] The radio frequency unit 1001 is further configured to report the CSI to the network side device.

[0479] 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.

[0480] 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 FIG5 . 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.

[0481] The embodiment of the present application also provides a network-side device. Figure 11 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 11, the network-side device 1100 includes: an antenna 111, a radio frequency device 112, a baseband device 113, a processor 114, and a memory 115. The antenna 111 is connected to the radio frequency device 112. In the uplink direction, the radio frequency device 112 receives information through the antenna 111 and sends the received information to the baseband device 113 for processing. In the downlink direction, the baseband device 113 processes the information to be sent and sends it to the radio frequency device 112. The radio frequency device 112 processes the received information and sends it out through the antenna 111.

[0482] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 113 , which includes a baseband processor.

[0483] The baseband device 113 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in Figure 11, one of the chips is, for example, a baseband processor, which is connected to the memory 115 through a bus interface to call the program in the memory 115 to execute the network device operations shown in the above method embodiment.

[0484] The network side device may further include a network interface 116, which is, for example, a Common Public Radio Interface (CPRI).

[0485] Specifically, the network side device 1100 of the embodiment of the present application also includes: instructions or programs stored in the memory 115 and executable on the processor 114. The processor 114 calls the instructions or programs in the memory 115 to execute the steps of the method embodiment shown in FIG5 and achieve the same technical effect. To avoid repetition, they will not be elaborated here.

[0486] 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.

[0487] 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.

[0488] 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.

[0489] 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.

[0490] 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.

[0491] An embodiment of the present application further 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 FIG2 , and the network-side device can be used to execute the steps of the method embodiment shown in FIG5 .

[0492] 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.

[0493] 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.

[0494] 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 in a frequency hopping manner, where different hops of the downlink reference signal are respectively mapped to different downlink reference signal resources; The terminal jointly processes the downlink reference signals on the downlink reference signal resources corresponding to different hops to obtain channel state information CSI; The terminal reports the CSI to the network side device.

2. The method for transmitting a downlink reference signal according to claim 1, wherein: Different hops of the downlink reference signal are respectively mapped on different downlink reference signal resources, including at least one of the following: Different hops of the downlink reference signal are respectively on different downlink reference signal resources in the same downlink reference signal resource set; Different hops of the downlink reference signal are respectively on downlink reference signal resources in different downlink reference signal resource sets.

3. The method for transmitting a downlink reference signal according to claim 2, wherein: The relationship between different downlink reference signal resources in the same downlink reference signal resource set satisfies at least one of the following: The different downlink reference signal resources are respectively configured with starting resource blocks RB and / or bandwidth; There is overlapping bandwidth between adjacent downlink reference signal resources in the frequency domain and / or time domain; The number of ports of the different downlink reference signal resources is the same, and the ports with the same port index of the different downlink reference signal resources are the same port; The power control offsets of the different downlink reference signal resources are the same; The quasi co-location QCLs of the different downlink reference signal resources are the same; The frequency domain allocation parameters within the RB of the different downlink reference signal resources are the same; The frequency domain densities of the different downlink reference signal resources are the same; The code division multiplexing (CDM) types of the different downlink reference signal resources are the same; The different downlink reference signal resources have the same scrambling code ID.

4. The method for transmitting a downlink reference signal according to claim 2, wherein: Each downlink reference signal resource in the different downlink reference signal resources is respectively configured or associated with a respective hop identification ID.

5. The method for transmitting a downlink reference signal according to claim 2, wherein: At least one target hop of the downlink reference signal is associated with more than two downlink reference signal resources in the downlink reference signal resource set, and when at least one downlink reference signal resource among the more than two downlink reference signal resources includes all downlink reference signal ports, each downlink reference signal resource in the downlink reference signal resource set is respectively configured or associated with a corresponding hop; or, In the case where one of the more than two downlink reference signal resources includes a part of the downlink reference signal ports, and multiple downlink reference signal resources of the more than two downlink reference signal resources constitute all the downlink reference signal ports, each downlink reference signal resource group is respectively configured or associated with a corresponding hop, wherein the multiple downlink reference signal resources included in each downlink reference signal resource group constitute all the downlink reference signal ports.

6. The method for transmitting a downlink reference signal according to claim 5, wherein: Multiple downlink reference signal resources associated with the same hop must meet at least one of the following conditions: The starting physical resource block PRB is the same; The number of RBs is the same; The frequency domain density is the same; The number of ports of downlink reference signal resources is the same; The CDM type is the same; The power control offset is the same.

7. The method for transmitting a downlink reference signal according to claim 5 or 6, wherein: At least one first downlink reference signal resource among the different downlink reference signal resources has a first association relationship, wherein the at least one first downlink reference signal resource is determined by at least one of the following methods: Sort multiple downlink reference signal resources associated with the same hop by time, and determine the at least one first downlink reference signal resource according to the multiple downlink reference signal resources in the same time domain order; Associating multiple downlink reference signal resources with the same hop to form a downlink reference signal resource list, and determining the at least one first downlink reference signal resource according to downlink reference signal resources with the same entry in the downlink reference signal resource lists corresponding to different hops; The at least one first downlink reference signal resource having the first association relationship is explicitly configured as a set.

8. The method for transmitting a downlink reference signal according to claim 7, wherein: The first association relationship satisfies at least one of the following: The at least one first downlink reference signal resource may be used for downlink reference signal resource joint processing to obtain CSI; The at least one first downlink reference signal resource has the same number of ports, and ports with the same port index of different first downlink reference signal resources are the same port; The QCL of the at least one first downlink reference signal resource is the same; There is overlapping bandwidth between adjacent first downlink reference signal resources in the frequency domain and / or time domain; The power control offset of the at least one first downlink reference signal resource is the same; The at least one first downlink reference signal resource has the same frequency domain allocation parameter within the RB; The frequency domain density of the at least one first downlink reference signal resource is the same; The scrambling code ID of the at least one first downlink reference signal resource is the same.

9. The method for transmitting a downlink reference signal according to claim 5, wherein: At least one second downlink reference signal resource group among the different downlink reference signal resources has a second association relationship, and the at least one second downlink reference signal resource group is determined by at least one of the following methods: Sort multiple downlink reference signal resource groups associated with the same hop by time, and determine the at least one second downlink reference signal resource group according to the multiple downlink reference signal resource groups in the same time domain order; A plurality of downlink reference signal resource groups associated with the same hop form a downlink reference signal resource group list, and determine the at least one second downlink reference signal resource group according to downlink reference signal resource groups of the same entry in the downlink reference signal resource group lists corresponding to different hops; The at least one second downlink reference signal resource group having the second association relationship is explicitly configured as a set.

10. The method for transmitting a downlink reference signal according to claim 9, wherein: The second association relationship satisfies at least one of the following: The at least one second downlink reference signal resource group may be used for downlink reference signal resource joint processing to obtain CSI; The at least one second downlink reference signal resource group has the same number of ports, and ports with the same port index in different second downlink reference signal resource groups are the same port; The at least one second downlink reference signal resource group has the same number of downlink reference signal resources; There is overlapping bandwidth between adjacent second downlink reference signal resource groups in the frequency domain and / or time domain.

11. The method for transmitting a downlink reference signal according to any one of claims 3 to 10, wherein: The method further comprises any of the following: The terminal receives first indication information sent by the network side device, wherein the first indication information is used to indicate trigger offsets corresponding to different downlink reference signal resources in the downlink reference signal resource set in the case of non-periodic downlink reference signal frequency hopping; The terminal receives second indication information sent by the network side device, wherein the second indication information is used to activate or deactivate downlink reference signal frequency hopping.

12. The method for transmitting a downlink reference signal according to claim 11, wherein: The second indication information includes at least one of the following: Downlink reference signal frequency hopping flag; Serving cell identifier; BWP logo; an identifier of the downlink reference signal resource set; A transmission configuration indication state TCI state identifier corresponding to the downlink reference signal resource in the downlink reference signal resource set.

13. The method for transmitting a downlink reference signal according to claim 2, wherein: The relationship between the multiple downlink reference signal resources in each downlink reference signal resource set in the different downlink reference signal resource sets satisfies at least one of the following: the same starting PRB; the same number of RBs; the same frequency domain density; the same number of downlink reference signal ports; and the same CDM type.

14. The method for transmitting a downlink reference signal according to claim 2, wherein: At least one third downlink reference signal resource in the different downlink reference signal resource sets has a third association relationship, wherein the at least one third downlink reference signal resource is determined by at least one of the following methods: Sort multiple downlink reference signal resources in the downlink reference signal resource set in time, and determine the at least one third downlink reference signal resource according to multiple downlink reference signal resources in the same time domain order; Determining the at least one third downlink reference signal resource according to the downlink reference signal resources of the same resource entry in the downlink reference signal resource set; Determine the at least one third downlink reference signal resource from a plurality of downlink reference signal resources having the same resource identifier in the downlink reference signal resource set; At least one third downlink reference signal resource having a third association relationship is explicitly configured as a set.

15. The method for transmitting a downlink reference signal according to claim 14, wherein: The third association relationship satisfies at least one of the following: The at least one third downlink reference signal resource may be used for downlink reference signal resource joint processing to obtain CSI; The at least one third downlink reference signal resource has the same number of ports, and the ports with the same port index are the same port; The QCL of the at least one third downlink reference signal resource is the same; There is overlapping bandwidth between the third downlink reference signal resources that are adjacent in the frequency domain and / or time domain; The power control offset of the at least one third downlink reference signal resource is the same; The at least one third downlink reference signal resource has the same frequency domain allocation parameter within the RB; The frequency domain density of the at least one third downlink reference signal resource is the same; The scrambling code ID of the at least one third downlink reference signal resource is the same; The at least one third downlink reference signal resource has the same CDM type.

16. The method for transmitting a downlink reference signal according to any one of claims 3 to 15, wherein: The method further comprises any of the following: The terminal receives third indication information sent by the network side device, wherein the third indication information is used to trigger multiple downlink reference signal resource sets for downlink reference signal frequency hopping; The terminal receives fourth indication information sent by the network side device, wherein the fourth indication information is used to activate or deactivate downlink reference signal frequency hopping.

17. The method for transmitting a downlink reference signal according to claim 16, wherein: The fourth indication information includes at least one of the following: Downlink reference signal frequency hopping flag; Serving cell identifier; BWP logo; An identifier of a downlink reference signal resource set; The TCI state identifier corresponding to the downlink reference signal resource in the downlink reference signal resource set.

18. The method for transmitting a downlink reference signal according to any one of claims 1 to 17, wherein: The method further comprises: In the process of the terminal reporting the CSI to the network side device, the terminal reports the downlink reference signal resource ID and / or the downlink reference signal resource set ID corresponding to the CSI.

19. A method for transmitting a downlink reference signal, comprising: The network side device sends a downlink reference signal to the terminal in a frequency hopping manner, and different hops of the downlink reference signal are respectively mapped to different downlink reference signal resources; The network side device receives channel state information CSI reported by the terminal, where the CSI is obtained by the terminal performing joint processing on the downlink reference signals on downlink reference signal resources corresponding to different hops.

20. The method for transmitting a downlink reference signal according to claim 19, wherein: Different hops of the downlink reference signal are respectively mapped on different downlink reference signal resources, including at least one of the following: Different hops of the downlink reference signal are respectively on different downlink reference signal resources in the same downlink reference signal resource set; Different hops of the downlink reference signal are respectively on downlink reference signal resources in different downlink reference signal resource sets.

21. The method for transmitting a downlink reference signal according to claim 20, wherein: The relationship between different downlink reference signal resources in the same downlink reference signal resource set satisfies at least one of the following: The different downlink reference signal resources are respectively configured with starting resource blocks RB and / or bandwidth; There is overlapping bandwidth between adjacent downlink reference signal resources in the frequency domain and / or time domain; The number of ports of the different downlink reference signal resources is the same, and the ports with the same port index of the different downlink reference signal resources are the same port; The power control offsets of the different downlink reference signal resources are the same; The quasi co-location QCLs of the different downlink reference signal resources are the same; The frequency domain allocation parameters within the RB of the different downlink reference signal resources are the same; The frequency domain densities of the different downlink reference signal resources are the same; The code division multiplexing (CDM) types of the different downlink reference signal resources are the same; The different downlink reference signal resources have the same scrambling code ID.

22. The method for transmitting a downlink reference signal according to claim 20, wherein: At least one target hop of the downlink reference signal is associated with more than two downlink reference signal resources in the downlink reference signal resource set, and when at least one downlink reference signal resource among the more than two downlink reference signal resources includes all downlink reference signal ports, each downlink reference signal resource in the downlink reference signal resource set is respectively configured or associated with a corresponding hop; or, In a case where one of the more than two downlink reference signal resources includes a part of the downlink reference signal ports, and multiple downlink reference signal resources among the more than two downlink reference signal resources constitute all the downlink reference signal ports, each downlink reference signal resource group is respectively configured or associated with a corresponding hop, wherein the multiple downlink reference signal resources included in each downlink reference signal resource group constitute all the downlink reference signal ports.

23. The method for transmitting a downlink reference signal according to claim 22, wherein: At least one first downlink reference signal resource among the different downlink reference signal resources has a first association relationship, wherein the at least one first downlink reference signal resource is determined by at least one of the following methods: Sort multiple downlink reference signal resources associated with the same hop by time, and determine the at least one first downlink reference signal resource according to the multiple downlink reference signal resources in the same time domain order; Associating multiple downlink reference signal resources with the same hop to form a downlink reference signal resource list, and determining the at least one first downlink reference signal resource according to downlink reference signal resources with the same entry in the downlink reference signal resource lists corresponding to different hops; The at least one first downlink reference signal resource having the first association relationship is explicitly configured as a set.

24. The method for transmitting a downlink reference signal according to claim 22, wherein: At least one second downlink reference signal resource group among the different downlink reference signal resources has a second association relationship, and the at least one second downlink reference signal resource group is determined by at least one of the following methods: Sort multiple downlink reference signal resource groups associated with the same hop by time, and determine the at least one second downlink reference signal resource group according to the multiple downlink reference signal resource groups in the same time domain order; A plurality of downlink reference signal resource groups associated with the same hop form a downlink reference signal resource group list, and determine the at least one second downlink reference signal resource group according to downlink reference signal resource groups of the same entry in the downlink reference signal resource group lists corresponding to different hops; The at least one second downlink reference signal resource group having the second association relationship is explicitly configured as a set.

25. The method for transmitting a downlink reference signal according to any one of claims 21 to 24, wherein: The method further comprises any of the following: The network side device sends first indication information to the terminal, wherein the first indication information is used to indicate trigger offsets corresponding to different downlink reference signal resources in the downlink reference signal resource set in the case of aperiodic downlink reference signal frequency hopping; The network side device sends second indication information to the terminal, wherein the second indication information is used to activate or deactivate downlink reference signal frequency hopping.

26. The method for transmitting a downlink reference signal according to claim 20, wherein: At least one third downlink reference signal resource in the different downlink reference signal resource sets has a third association relationship, wherein the at least one third downlink reference signal resource is determined by at least one of the following methods: Sort multiple downlink reference signal resources in the downlink reference signal resource set in time, and determine the at least one third downlink reference signal resource according to multiple downlink reference signal resources in the same time domain order; Determining the at least one third downlink reference signal resource according to the downlink reference signal resources of the same resource entry in the downlink reference signal resource set; Determine the at least one third downlink reference signal resource from a plurality of downlink reference signal resources having the same resource identifier in the downlink reference signal resource set; At least one third downlink reference signal resource having a third association relationship is explicitly configured as a set.

27. The method for transmitting a downlink reference signal according to any one of claims 21 to 26, wherein: The method further comprises any of the following: The network side device sends third indication information to the terminal, wherein the third indication information is used to trigger multiple downlink reference signal resource sets for downlink reference signal frequency hopping; The network side device sends fourth indication information to the terminal, wherein the fourth indication information is used to activate or deactivate downlink reference signal frequency hopping.

28. The method for transmitting a downlink reference signal according to any one of claims 19 to 27, wherein: The method further comprises: The network side device receives a downlink reference signal resource ID and / or a downlink reference signal resource set ID corresponding to the CSI reported by the terminal.

29. A downlink reference signal transmission device, comprising: A first receiving module is used to receive a downlink reference signal sent by a network side device in a frequency hopping manner, where different hops of the downlink reference signal are respectively mapped to different downlink reference signal resources; A processing module, configured to jointly process the downlink reference signals on the downlink reference signal resources corresponding to different hops to obtain channel state information CSI; A reporting module is used to report the CSI to the network side device.

30. The downlink reference signal transmission device according to claim 29, wherein: The first receiving module is further used for any of the following: receiving first indication information sent by the network side device, wherein the first indication information is used to indicate trigger offsets corresponding to different downlink reference signal resources in the downlink reference signal resource set in the case of aperiodic downlink reference signal frequency hopping; Receive second indication information sent by the network side device, wherein the second indication information is used to activate or deactivate downlink reference signal frequency hopping.

31. The downlink reference signal transmission device according to claim 29 or 30, wherein: The first receiving module is further used for any of the following: receiving third indication information sent by the network side device, wherein the third indication information is used to trigger multiple downlink reference signal resource sets for downlink reference signal frequency hopping; Receive fourth indication information sent by the network side device, wherein the fourth indication information is used to activate or deactivate downlink reference signal frequency hopping.

32. The downlink reference signal transmission device according to any one of claims 29 to 31, wherein: The reporting module is further configured to report a downlink reference signal resource ID and / or a downlink reference signal resource set ID corresponding to the CSI.

33. A downlink reference signal transmission device, comprising: A sending module, used to send a downlink reference signal to a terminal in a frequency hopping manner, where different hops of the downlink reference signal are respectively mapped to different downlink reference signal resources; The second receiving module is used to receive channel state information CSI reported by the terminal, where the CSI is obtained by the terminal performing joint processing on the downlink reference signals on the downlink reference signal resources corresponding to different hops.

34. The downlink reference signal transmission device according to claim 33, wherein: The sending module is also used for any of the following: Sending first indication information to the terminal, wherein the first indication information is used to indicate trigger offsets corresponding to different downlink reference signal resources in the downlink reference signal resource set in the case of aperiodic downlink reference signal frequency hopping; Sending second indication information to the terminal, wherein the second indication information is used to activate or deactivate downlink reference signal frequency hopping.

35. The downlink reference signal transmission device according to claim 33 or 34, wherein: The sending module is also used for any of the following: Sending third indication information to the terminal, wherein the third indication information is used to trigger multiple downlink reference signal resource sets for downlink reference signal frequency hopping; Send fourth indication information to the terminal, wherein the fourth indication information is used to activate or deactivate downlink reference signal frequency hopping.

36. The downlink reference signal transmission device according to any one of claims 33 to 35, wherein: The second receiving module is further configured to receive a downlink reference signal resource ID and / or a downlink reference signal resource set ID corresponding to the CSI reported by the terminal.

37. A terminal comprises 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 18 are implemented.

38. 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 19 to 28 are implemented.

39. 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 18, or implements the steps of the downlink reference signal transmission method as described in any one of claims 19 to 28.

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