Downlink reference signal transmission method, terminal and network side equipment

Abstract

The invention discloses a downlink reference signal transmission method, a terminal and network side equipment, and belongs to the technical field of wireless communication, and the downlink reference signal transmission method comprises the steps that the terminal receives a downlink reference signal sent by the network side equipment in a frequency hopping mode, different hops of the downlink reference signal are respectively mapped on different downlink reference signal resources; the terminal performs joint processing on the downlink reference signals on the downlink reference signal resources corresponding to the different hops respectively to obtain CSI (Channel State Information); and the terminal reports the CSI to the network side equipment.

Description

Technical Field

[0001] 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

[0002] In the 6th Generation Mobile Communication Technology (6G) system, a terminal, such as a User Equipment (UE), will perform Channel State Information (CSI) measurement over a large bandwidth.

[0003] However, considering factors such as terminal capabilities and processing complexity, how the terminal processes a large-bandwidth downlink reference signal is a technical problem that needs to be solved urgently. Summary of the invention

[0004] 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.

[0005] In a first aspect, a downlink reference signal transmission method is provided, which is performed by a terminal, and the method includes:

[0006] 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;

[0007] The terminal jointly processes the downlink reference signals on the downlink reference signal resources corresponding to different hops to obtain channel state information CSI;

[0008] The terminal reports the CSI to the network side device.

[0009] In a second aspect, a downlink reference signal transmission method is provided, which is performed by a network side device, and the method includes:

[0010] 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;

[0011] 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.

[0012] In a third aspect, a downlink reference signal transmission device is provided, including:

[0013] A first receiving module, 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 respectively mapped to different downlink reference signal resources;

[0014] A processing module, configured to jointly process the downlink reference signals on the downlink reference signal resources corresponding to different hops respectively to obtain channel state information CSI;

[0015] A reporting module, configured to report the CSI to the network-side device.

[0016] In a fourth aspect, a downlink reference signal transmission device is provided, including:

[0017] A sending module, configured 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;

[0018] A second receiving module, configured to receive the channel state information CSI reported by the terminal, where the CSI is obtained by the terminal jointly processing the downlink reference signals on the downlink reference signal resources corresponding to different hops respectively.

[0019] In a fifth aspect, a terminal is provided, where the terminal includes a processor and a memory, and the memory stores a program or instruction that can 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.

[0020] In a sixth aspect, a terminal is provided, including a processor and a communication interface, where:

[0021] 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 respectively mapped to different downlink reference signal resources;

[0022] The processor is configured to jointly process the downlink reference signals on the downlink reference signal resources corresponding to different hops respectively to obtain channel state information CSI;

[0023] The communication interface is further configured to report the CSI to the network-side device.

[0024] In a seventh aspect, a network-side device is provided, where the network-side device includes a processor and a memory, and the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the second aspect are implemented.

[0025] In an eighth aspect, a network-side device is provided, including a processor and a communication interface. The communication interface 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 respectively mapped to different downlink reference signal resources; receive channel state information (CSI) reported by the terminal, where the CSI is obtained by the terminal through joint processing of the downlink reference signal on the downlink reference signal resources corresponding to different hops respectively.

[0026] In a ninth aspect, a readable storage medium is provided. A program or instruction is stored on the readable storage medium, and 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.

[0027] In a tenth aspect, a wireless communication system is provided, including: a terminal and a network-side device. 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.

[0028] In an eleventh aspect, a chip is provided. The chip includes a processor and a communication interface, and the communication interface is coupled to the processor. The processor is configured to run a program or instruction to implement the method described in the first aspect, or implement the method described in the second aspect.

[0029] In a twelfth aspect, a computer program / program product is provided. The computer program / program product is stored in a storage medium, and the program / program product is executed by at least one processor to implement the steps of the method described in the first aspect, or implement the steps of the method described in the second aspect.

[0030] In an embodiment of the present application, by a terminal receiving a downlink reference signal sent by a network-side device in a frequency hopping manner, different hops of the downlink reference signal are respectively mapped to different downlink reference signal resources, and the terminal performs joint processing on the downlink reference signal on the downlink reference signal resources corresponding to different hops respectively 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 relatively small. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A block diagram of a wireless communication system to which an embodiment of the present application can be applied is shown;

[0032] Figure 2 is one of the schematic flowcharts of the downlink reference signal transmission method provided by an embodiment of the present application;

[0033] Figure 3It is a schematic diagram showing that different resources in the CSI-RS resource set provided by the embodiments of the present application correspond to different hops;

[0034] Figure 4 It is a schematic diagram showing that different CSI-RS resource sets provided by the embodiments of the present application correspond to different hops;

[0035] Figure 5 It is the second schematic flowchart of the downlink reference signal transmission method provided by the embodiments of the present application;

[0036] Figure 6 It is the third schematic flowchart of the downlink reference signal transmission method provided by the embodiments of the present application;

[0037] Figure 7 It is the first schematic structural diagram of the downlink reference signal transmission device provided by the embodiments of the present application;

[0038] Figure 8 It is the second schematic structural diagram of the downlink reference signal transmission device provided by the embodiments of the present application;

[0039] Figure 9 It is the schematic structural diagram of the communication device provided by the embodiments of the present application;

[0040] Figure 10 It is the schematic hardware structure diagram of the terminal provided by the embodiments of the present application;

[0041] Figure 11 It is the schematic hardware structure diagram of the network-side device provided by the embodiments of the present application. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application belong to the scope of protection of the present application.

[0043] The terms "first", "second", etc. in this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances, so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are usually of the same category, and do not limit the number of objects. For example, the first object can be one or more. In addition, "or" in this application means at least one of the connected objects. For example, "A or B" covers three scenarios, namely, Scenario 1: including A and not including B; Scenario 2: including B and not including A; Scenario 3: including both A and B. The character " / " generally indicates that the related objects before and after are in an "or" relationship.

[0044] The term "indication" in this application can be either a direct indication (or an explicit indication) or an indirect indication (or an implicit indication). Among them, a direct indication can be understood as that the sender clearly tells the receiver specific information, operations to be performed, or request results, etc. in the sent indication; an indirect indication can be understood as that the receiver determines the corresponding information according to the indication sent by the sender, or makes a judgment and determines the operations to be performed or request results, etc. according to the judgment result.

[0045] It is worth pointing out that the technology described in the embodiments of this application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, and 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 this application are often used interchangeably, and the described technology can be used not only in the systems and radio technologies mentioned above, but also in other systems and radio technologies. The following description describes the New Radio (NR) system for example purposes, and uses NR terms in most of the following descriptions, but these technologies can also be applied to systems other than the NR system, such as the 6th generation (6 thGeneration, 6G) communication system.

[0046] Figure 1A block diagram of a wireless communication system to which embodiments of the present application can be applied is shown. The wireless communication system includes a terminal 11 and a network-side device 12. Among them, the terminal 11 can be a mobile phone, a tablet personal computer, a 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, a flight vehicle, a vehicle user equipment (VUE), a shipborne device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, TVs, washing machines, or furniture, etc.), a game console, a personal computer (PC), a teller machine, or a self-service machine, etc. Wearable devices include: smart watches, smart bracelets, smart earphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart ankle chains, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle user equipment can also be referred to as a vehicle terminal, a vehicle controller, a vehicle module, a vehicle component, a vehicle chip, or a vehicle unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application. The network-side device 12 can include an access network device or a core network device. Among them, the access network device can also be referred to as a radio access network (RAN) device, a radio access network function, or a radio access network unit. The access network device can 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, Transmission Reception Point (TRP), or some other suitable term in the art. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiments of this application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0047] Next, with reference to the accompanying drawings, the downlink reference signal transmission method, terminal, and network-side device provided in the embodiments of this application will be described in detail through some embodiments and their application scenarios.

[0048] Figure 2 is one of the flow diagrams of the downlink reference signal transmission method provided in the embodiments of this application. This method is applied to a terminal, such as Figure 2 shown, and this method includes steps 201 to 203:

[0049] Step 201: The terminal receives the downlink reference signal sent by the network-side device through frequency hopping, and different hops of the downlink reference signal are respectively mapped on different downlink reference signal resources.

[0050] Optionally, the network-side device sends the downlink reference signal to the terminal through frequency hopping, and different hops of the downlink reference signal are respectively mapped on different downlink reference signal resources.

[0051] It should be noted that the downlink reference signal is used for the measurement of channel state information, and the downlink reference signal is, for example, a Channel State Information Reference Signal (CSI-RS).

[0052] Step 202: The terminal jointly processes the downlink reference signals on the downlink reference signal resources corresponding to different hops respectively to obtain CSI.

[0053] For example, the network device sends CSI-RS to the terminal in a frequency hopping manner, and different hops of the CSI-RS (i.e., multiple hops of the 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 the CSI-RS respectively to obtain CSI. Optionally, the implementation manner of the joint processing may include: multiple hops form an equivalent large bandwidth, and the terminal obtains a CSI measurement result based on the CSI-RS of the equivalent large bandwidth. For example, the terminal may obtain broadband CSI according to the equivalent large bandwidth; or the terminal may obtain narrowband CSI after frequency domain compression (such as enhanced type 2 (eType2) codebook feedback) according to the equivalent large bandwidth.

[0054] Step 203: The terminal reports the CSI to the network device.

[0055] In the embodiments of the present application, by the terminal receiving the downlink reference signals sent by the network device in a frequency hopping manner, different hops of the downlink reference signals are respectively mapped on different downlink reference signal resources, and the terminal jointly processes the downlink reference signals on the downlink reference signal resources corresponding to different hops respectively 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.

[0056] Optionally, the implementation scheme in which different hops of the downlink reference signals are respectively mapped on different downlink reference signal resources may include at least one of the following:

[0057] Solution 1: Different hops of the downlink reference signals are respectively on different downlink reference signal resources within the same downlink reference signal resource set.

[0058] For example, different CSI-RS resources are different CSI-RS resources within the same CSI-RS resource set, that is, different hops of the CSI-RS are respectively 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 It is a schematic diagram of different resources corresponding to different hops within the CSI-RS resource set provided by the embodiments of the present application.

[0059] Optionally, each hop of the downlink reference signal corresponds to one or more downlink reference signal resources within the downlink reference signal resource set. For example, M CSI-RS resources within a CSI-RS resource set respectively correspond to N hops, where both M and N are positive integers.

[0060] Optionally, the implementation manner in which each hop of the downlink reference signal corresponds to one or more downlink reference signal resources within the downlink reference signal resource set may include at least one of the following:

[0061] Implementation manner 1: Different hops of the downlink reference signal are in one-to-one correspondence with different downlink reference signal resources within the downlink reference signal resource set. For example, M = N, that is, the CSI-RS resources within a CSI-RS resource set are in one-to-one correspondence with the hops.

[0062] Optionally, each of the different downlink reference signal resources within the downlink reference signal resource set is respectively configured or associated with its own hop. Optionally, the description that each downlink reference signal resource is respectively configured or associated with a corresponding hop can also be: Each downlink reference signal resource is respectively configured or associated with a corresponding hop identifier (ID).

[0063] For example, when each CSI-RS resource is respectively configured or associated with a corresponding hop, it can be understood that each CSI-RS resource is respectively configured or associated with a corresponding hop ID.

[0064] Optionally, the relationship between different downlink reference signal resources within the same downlink reference signal resource set satisfies at least one of the following:

[0065] 1) The different downlink reference signal resources are respectively configured with a starting resource block (RB) and / or bandwidth.

[0066] For example, multiple CSI-RS resources are respectively configured with a starting RB (starting RB) and / or bandwidth. For instance, the bandwidths configured for multiple CSI-RS resources are the same.

[0067] 2) There is an overlapping bandwidth between downlink reference signal resources that are adjacent in the frequency domain and / or time domain.

[0068] For example, there is an overlapping bandwidth between CSI-RS resources that are adjacent in the frequency domain and / or time domain. For instance, the overlapping bandwidths between CSI-RS resources that are adjacent in the frequency domain and / or time domain are equal.

[0069] 3) The number of ports of the different downlink reference signal resources is the same, and the ports with the same port index among the different downlink reference signal resources are the same port.

[0070] For example, ports of multiple CSI-RS resources have the same number, and ports with the same port index in different CSI-RS resources are the same port. Optionally, CDM (Code Division Mutiplexing) types are the same, CDM group sizes are the same, and CDM groups with the same CDM group index on different CSI-RS resources belong to the same CDM group.

[0071] 4) The power control offsets of the different downlink reference signal resources are the same.

[0072] For example, the power control offsets of multiple CSI-RS resources are the same. In other words, the transmission powers of different downlink reference signal resources are the same.

[0073] 5) The Quasi Co-Location (QCL) of the different downlink reference signal resources is the same.

[0074] For example, the QCL of multiple CSI-RS resources is the same. For instance: 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 (QCLsource RS).

[0075] 6) The in-RB frequency domain allocation parameters of the different downlink reference signal resources are the same.

[0076] For example, the in-RB frequency domain allocation parameters of multiple CSI-RS resources are the same.

[0077] 7) The frequency domain densities of the different downlink reference signal resources are the same.

[0078] For example, the frequency domain densities of multiple CSI-RS resources are the same.

[0079] 8) The CDM types of the different downlink reference signal resources are the same.

[0080] For example, the CDM types of multiple CSI-RS resources are the same.

[0081] 9) The scrambling ID of the different downlink reference signal resources is the same.

[0082] For example, the scrambling IDs of multiple CSI-RS resources are the same.

[0083] Optionally, for the downlink reference signal resource set, the network configures'repetition on', indicating that different downlink reference signal resources are sent from the same beam.

[0084] For example, if the CSI-RS resource set is configured as 'frequency hopping' and'repetition on' is also configured, the terminal receives different CSI-RS resources with the same receive beam (Rx beam); otherwise, this assumption does not hold.

[0085] Implementation method 2: At least one target hop of the downlink reference signal is associated with two or more downlink reference signal resources within the downlink reference signal resource set.

[0086] For example, M > N, that is, M CSI-RS resources within a CSI-RS resource set correspond to N hops, and there is a case where 1 hop is associated with at least 2 CSI-RS resources.

[0087] Optionally, different hops are associated with the same number of downlink reference signal resources.

[0088] Optionally, in the case where at least one of the two or more downlink reference signal resources includes all the 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.

[0089] For example, 1 CSI-RS resource includes all the CSI-RS ports. For instance, the total number of CSI-RS ports is 32, and each CSI-RS resource also includes 32 CSI-RS ports. Each CSI-RS resource is configured or associated with a corresponding hop.

[0090] It should be noted that each downlink reference signal resource being respectively configured or associated with a corresponding hop can be understood as each downlink reference signal resource being respectively configured or associated with a corresponding hop ID.

[0091] 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.

[0092] Furthermore, multiple downlink reference signal resources associated with the same hop satisfy at least one of the following:

[0093] 1) The starting physical resource block PRB is the same.

[0094] For example, the starting PRBs of multiple CSI-RS resources associated with the same hop ID are the same.

[0095] 2) The number of RBs is the same.

[0096] For example, the number of RBs of multiple CSI-RS resources associated with the same hop ID is the same.

[0097] 3) The frequency-domain density is the same.

[0098] For example, the frequency-domain densities of multiple CSI-RS resources associated with the same hop ID are the same.

[0099] 4) The number of ports of the downlink reference signal resources is the same.

[0100] For example, the number of ports of multiple CSI-RS resources associated with the same hop ID is the same.

[0101] 5) The CDM type is the same.

[0102] For example, the CDM types of multiple CSI-RS resources associated with the same hop ID are the same.

[0103] 6) The power control offset is the same.

[0104] In other words, the transmission powers of different downlink reference signal resources are the same.

[0105] 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 specific downlink reference signal resource 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 specific CSI-RS resource between different hops.

[0106] Among them, the at least one first downlink reference signal resource having the first association relationship can be determined by at least one of the following methods:

[0107] Method a: Sort the multiple downlink reference signal resources associated with the same hop in time order, 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.

[0108] It should be noted that the multiple downlink reference signal resources associated with the same hop can be understood as the multiple downlink reference signal resources associated with the same hop ID.

[0109] For example, the multiple CSI-RS resources associated with the same hop ID are sorted in time order; the multiple CSI-RS resources in the same time domain order have a first association relationship.

[0110] Method b: The multiple downlink reference signal resources associated with the same hop are combined to form a downlink reference signal resource list, and the at least one first downlink reference signal resource is determined according to the downlink reference signal resources at the same entry in the downlink reference signal resource lists corresponding to different hops.

[0111] For example, each hop configures 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.

[0112] In method c, the at least one first downlink reference signal resource having the first association relationship is explicitly configured as a set.

[0113] For example, CSI-RS resources (or CSI-RS resource IDs) having a first association relationship are configured into one group, and are divided into multiple groups in total. Each group includes X1 CSI-RS resources, and X1 is a positive integer.

[0114] Optionally, the first association relationship satisfies at least one of the following:

[0115] 1) The at least one first downlink reference signal resource can be used for joint processing of downlink reference signal resources to obtain CSI.

[0116] 2) The at least one first downlink reference signal resource has the same number of ports, and ports with the same port index among different first downlink reference signal resources are the same port.

[0117] 3) The at least one first downlink reference signal resource has the same QCL.

[0118] 4) There is an overlapping bandwidth between first downlink reference signal resources adjacent in the frequency domain and / or time domain.

[0119] 5) The at least one first downlink reference signal resource has the same power control offset.

[0120] 6) The at least one first downlink reference signal resource has the same frequency domain allocation parameter within an RB.

[0121] 7) The at least one first downlink reference signal resource has the same frequency domain density.

[0122] 8) The at least one first downlink reference signal resource has the same scrambling ID.

[0123] Optionally, for a downlink reference signal resource set, the network configures'repetition on / off', and'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 the assumption that the different downlink reference signal resources are not sent from the same beam.

[0124] Optionally, for the 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 these multiple downlink reference signal resources are used for the TRS function.

[0125] Optionally, when one of the two or more downlink reference signal resources contains partial downlink reference signal ports, and multiple of 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, where the multiple downlink reference signal resources included in each downlink reference signal resource group constitute all the downlink reference signal ports.

[0126] For example, 1 CSI-RS resource contains partial CSI-RS ports, and multiple CSI-RS resources constitute all the CSI-RS ports. For instance, the total number of CSI-RS ports is 128, each CSI-RS resource also contains 32 CSI-RS ports, and 4 CSI-RS resources constitute all the CSI-RS ports. The multiple CSI-RS included in each CSI-RS group (group) constitute all the CSI-RS ports. Each CSI-RS group is respectively configured or associated with a corresponding hop.

[0127] It should be noted that each downlink reference signal resource group being respectively configured or associated with a corresponding hop can be understood as each downlink reference signal resource group being respectively configured or associated with a corresponding hop ID.

[0128] Optionally, at least one second downlink reference signal resource group among the different downlink reference signal resources has a second association relationship. Multiple second downlink reference signal resource groups with the second association relationship are linked resource groups.

[0129] Optionally, the at least one second downlink reference signal resource group with the second association relationship is determined by at least one of the following methods:

[0130] Method a: Sort the multiple downlink reference signal resource groups associated with the same hop in time order, and determine 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.

[0131] For example, the multiple CSI-RS groups associated with the same hop ID are sorted in time order; the multiple CSI-RS groups in the same time domain order have a second association relationship.

[0132] In Method b, multiple downlink reference signal resource groups associated with the same hop form a downlink reference signal resource group list, and at least one second downlink reference signal resource group is determined according to the downlink reference signal resource groups with the same entry in the downlink reference signal resource group lists corresponding to different hops.

[0133] For example, each hop configures a CSI-RS resource group list, and the CSI-RS resource groups corresponding to the same entry in the resource group lists corresponding to different hops have a second association relationship.

[0134] In Method c, at least one second downlink reference signal resource group having the second association relationship is explicitly configured as a set.

[0135] For example, the CSI-RS resource groups (or CSI-RS resource group IDs) having the second association relationship are configured into one group, and are divided into multiple groups in total. Each group has X2 CSI-RS resource groups, where X2 is a positive integer.

[0136] Optionally, the second association relationship satisfies at least one of the following:

[0137] 1) At least one second downlink reference signal resource group can be used for joint processing of downlink reference signal resources to obtain CSI;

[0138] 2) At least one second downlink reference signal resource group has the same number of ports, and the ports with the same port index in different second downlink reference signal resource groups are the same ports;

[0139] 3) At least one second downlink reference signal resource group has the same number of downlink reference signal resources;

[0140] 4) There is an overlapping bandwidth between second downlink reference signal resource groups that are adjacent in the frequency domain and / or time domain.

[0141] Optionally, for Implementation Method 1 and / or Implementation Method 2, the terminal ignores or does not expect to configure'repetition' and / or 'trs-info'. For the downlink reference signal resource set, the network configures an identifier indicating that the downlink reference signal resources within the downlink reference signal resource set are used for 'frequency hopping'.

[0142] Optionally, the downlink reference signal transmission method provided by the embodiments of this application further includes any one of the following:

[0143] 1) The terminal receives first indication information sent by the network side device, where 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.

[0144] For example, for aperiodic CSI-RS frequency hopping, for aperiodic CSI-RS transmission, the network configures 'trigger offsets' corresponding to multiple CSI-RS resources in a CSI-RS resource set respectively. Therefore, it is allowed to send from different slots for multiple aperiodic hops.

[0145] Optionally, the network configures a trigger offset for each CSI-RS resource respectively, or the network configures a trigger offset of the first CSI-RS resource in the CSI-RS resource set and relative trigger offsets of other CSI-RS resources relative to the first CSI-RS resource.

[0146] 2) The terminal receives second indication information sent by the network side device, where the second indication information is used to activate or deactivate downlink reference signal frequency hopping.

[0147] For example, for semi-persistent CSI-RS frequency hopping, for semi-persistent CSI-RS transmission, the Medium Access Control (MAC) Control Element (CE) is used to activate / deactivate CSI-RS frequency hopping. For example, it is indicated that this MAC CE is used for CSI-RS frequency hopping through a reserved bit '1bit' in the MAC CE.

[0148] Optionally, the second indication information includes at least one of the following:

[0149] (1) Downlink reference signal frequency hopping flag;

[0150] (2) Serving cell identifier;

[0151] (3) BWP identification. The BWP identification is the BWP where the downlink reference signal is located. If the terminal measures a downlink reference signal outside the active BWP, the BWP identification may be a virtual BWP; or, the second indication information does not include the BWP identification or omits the BWP identification.

[0152] (4) The identification of the downlink reference signal resource set;

[0153] (5) The transmission configuration indication (Transmission Configuration state, TCI state) identification corresponding to the downlink reference signal resource in the downlink reference signal resource set.

[0154] Optionally, for implementation manner 1, the TCI states corresponding to different downlink reference signal resources are the same; or, only one TCI state is indicated in the second indication information, and different downlink reference signal resources share the same TCI state.

[0155] For example, considering that the TCI states of multiple CSI-RS resources in the CSI-RS resource set are the same, only one TCI state is indicated in the MAC CE (such as only indicating TCI state ID0). Or, the TCI states corresponding to multiple CSI-RS resources in the MAC CE are the same

[0156] 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.

[0157] For example, there are N TCI states indicated in the MAC CE, which respectively represent the TCI states of N CSI-RS resources with the same hop ID. The hop (hop ID) where the N CSI-RS resources are located can be indicated in the MAC CE, or indicated by RRC, or a default hop is agreed upon by the protocol, or any one hop. For CSI-RS resources with an association relationship on different hops, the TCI states are the same, and the TCI state can be determined by referring to the TCI state of the target CSI-RS resource with an association relationship therewith.

[0158] Optionally, the downlink reference signal transmission method provided in the embodiments of the present application further includes:

[0159] During the process of the terminal reporting the CSI to the network side device, the terminal reports the downlink reference signal resource ID corresponding to the CSI and / or the downlink reference signal resource set ID.

[0160] For example, the terminal jointly processes the CSI-RS resources in the CSI-RS resource set, reports the CSI, and reports the CSI-RS resource ID (CSI-RS resource ID) and / or the CSI-RS resource set ID (CSI-RS resource set ID) associated with the CSI.

[0161] For example, the terminal jointly processes the CSI-RS resources with an association relationship, and only reports one of the CSI-RS resource IDs to identify the CSI as the jointly processed CSI.

[0162] For another example, the terminal jointly processes the CSI-RS resources with an association relationship, and reports the actually used CSI-RS resource ID to identify the CSI as the jointly processed CSI.

[0163] Solution 2: Different hops of the downlink reference signal are on the downlink reference signal resources in different downlink reference signal resource sets.

[0164] For example, different CSI-RS resources are CSI-RS resources in 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 respectively correspond to different CSI-RS resource sets. Optionally, each of 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 in different CSI-RS resource sets is the same. Figure 4 It is a schematic diagram of different CSI-RS resource sets corresponding to different hops provided by the embodiments of the present application.

[0165] For example, the network configures multiple CSI-RS resource sets in a CSI-RS resource configuration information (CSI-RS resource config), which respectively correspond to different hops. The multiple CSI-RS resource sets form a CSI-RS resource set list (CSI-RS resource set list) or a CSI-RS resource set group (CSI-RS resource set group) for the hop. The multiple CSI-RS resource sets for frequency hopping can be referred to as associated CSI-RS resource sets (linked CSI-RS resource set).

[0166] Optionally, the relationship between the multiple downlink reference signal resources in each of the different downlink reference signal resource sets satisfies at least one of the following:

[0167] 1) The starting PRBs are the same;

[0168] 2) The number of RBs is the same;

[0169] 3) The frequency-domain density is the same;

[0170] 4) The number of downlink reference signal ports is the same;

[0171] 5) The CDM types are the same.

[0172] Optionally, at least one third downlink reference signal resource in the different downlink reference signal resource sets has a third association relationship. Among them, the at least one third downlink reference signal resource with the third association relationship is determined by at least one of the following methods:

[0173] Method a: Sort the multiple downlink reference signal resources in the downlink reference signal resource set by time, and determine the at least one third downlink reference signal resource according to the multiple downlink reference signal resources with the same time domain order in different downlink reference signal resource sets.

[0174] For example, the multiple CSI-RS resources in the CSI-RS resource set are sorted by time; the multiple CSI-RS resources with the same time domain order have a third association relationship.

[0175] Method b: Determine the at least one third downlink reference signal resource according to the downlink reference signal resources with the same resource entry in different downlink reference signal resource sets.

[0176] For example, the CSI-RS resources corresponding to the same entry in the CSI-RS resource set have a third association relationship.

[0177] Method c: Determine the at least one third downlink reference signal resource from the multiple downlink reference signal resources with the same resource identifier in different downlink reference signal resource sets.

[0178] For example, the multiple CSI-RS resources with the same resource identifier in the CSI-RS resource set have a third association relationship.

[0179] Method d: Explicitly configure the at least one third downlink reference signal resource with the third association relationship as a set.

[0180] For example, configure the CSI-RS resources (or CSI-RS resource IDs) with the third association relationship into one group, and divide them into multiple groups in total. Each group includes X3 CSI-RS resources, and X3 is a positive integer.

[0181] Optionally, the third association relationship satisfies at least one of the following:

[0182] 1) The at least one third downlink reference signal resource can be used for joint processing of downlink reference signal resources to obtain CSI.

[0183] 2) The at least one third downlink reference signal resource has the same number of ports, and ports with the same port index are the same port.

[0184] 3) The at least one third downlink reference signal resource has the same QCL.

[0185] 4) There is an overlapping bandwidth between third downlink reference signal resources that are adjacent in the frequency domain and / or time domain.

[0186] 5) The at least one third downlink reference signal resource has the same power control offset.

[0187] 6) The frequency domain allocation parameters within the RB of the at least one third downlink reference signal resource are the same;

[0188] 7) The at least one third downlink reference signal resource has the same frequency domain density.

[0189] 8) The at least one third downlink reference signal resource has the same scrambling ID.

[0190] 9) The at least one third downlink reference signal resource has the same CDM type.

[0191] Optionally, for each downlink reference signal resource set, the terminal ignores or does not expect to configure'repetition' and / or 'trs-info'.

[0192] Optionally, for each downlink reference signal resource set, the network configures a specific identifier for identifying that the downlink reference signal resources within the downlink reference signal resource set are used for 'frequency hopping'.

[0193] Optionally, the downlink reference signal transmission method provided by the embodiments of the present application further includes any one of the following:

[0194] 1) The terminal receives third indication information sent by the network side device, where the third indication information is used to trigger multiple downlink reference signal resource sets for downlink reference signal frequency hopping.

[0195] For example, for non-periodic CSI-RS frequency hopping, for non-periodic CSI-RS transmission, the network configures 'trigger offset' corresponding to multiple resources within a CSI-RS resource set.

[0196] Optionally, the network configures a trigger offset for each CSI-RS resource respectively, or the network configures the trigger offset of the first CSI-RS resource in the CSI-RS resource set and the relative trigger offset of other CSI-RS resources relative to the first CSI-RS resource.

[0197] Optionally, for aperiodic CSI-RS transmission, the network configures multiple CSI-RS resource sets in the 'CSI-AssociatedReportConfigInfo' for CSI-RS frequency hopping.

[0198] Optionally, for aperiodic CSI-RS transmission, DCI is used to trigger CSI-RS frequency hopping. Since multiple CSI-RS resource sets are included in the 'CSI-AssociatedReportConfigInfo', triggering the transmission of multiple CSI-RS resource sets at one time corresponds to multiple hops.

[0199] 2) The terminal receives the fourth indication information sent by the network device on the network side, where the fourth indication information is used to activate or deactivate downlink reference signal frequency hopping.

[0200] Optionally, the fourth indication information includes at least one of the following:

[0201] (1) Downlink reference signal frequency hopping flag;

[0202] (2) Serving cell identifier;

[0203] (3) BWP identifier;

[0204] (4) Identifier of the downlink reference signal resource set;

[0205] (5) Identifier of the TCI state corresponding to the downlink reference signal resource in the downlink reference signal resource set.

[0206] For example, for semi-persistent CSI-RS frequency hopping, for semi-persistent CSI-RS transmission, the network includes multiple CSI-RS resource sets in a CSI-RS resource configuration (CSI-RS resource config) for CSI-RS frequency hopping. For semi-persistent CSI-RS transmission, MAC CE is used to activate / deactivate CSI-RS frequency hopping. For example, the reserved bit '1bit' in the MAC CE indicates that the MAC CE is used for CSI-RS frequency hopping.

[0207] Optionally, the method for activating / deactivating CSI-RS hopping using MAC CE may include at least one of the following:

[0208] (1) At least one CSI-RS resource set for activation / deactivation is included in the MAC CE;

[0209] (2) One CSI-RS resource set for activation / deactivation is included in the MAC CE. By indicating one CSI-RS resource set, all CSI-RS resource sets used for hopping are default-activated. For example, the network configures 'indicator' to enable the function of activating / deactivating CSI-RS hopping; when 'indicator' is 1, the function is enabled; when 'indicator' is 0, the function is not enabled, that is, only one CSI-RS resource set indicated in the MAC CE is activated / deactivated.

[0210] Optionally, if multiple CSI-RS resource sets are activated, considering the correlation between the corresponding CSI-RS resources in different CSI-RS resource sets, the TCI state of multiple correlated CSI-RS resources is represented by one TCI state ID. For example: TCI State ID 0 indicates the first CSI-RS resource in all activated CSI-RS resource sets.

[0211] Optionally, for implementation manner 1, the identifiers of the downlink reference signal resource sets are multiple, corresponding one by one to different downlink reference signal resource sets; or, the identifier of the downlink reference signal resource set is 1, and the identifier of the 1 downlink reference signal resource set is used for the terminal to activate all downlink reference signal resource sets used for hopping.

[0212] Optionally, for implementation manner 2, the TCI state corresponds one by one to multiple downlink reference signal resources in one downlink reference signal resource set. That is, by indicating the TCI state of multiple downlink reference signal resources in one downlink reference signal resource set, the TCI state of the associated downlink reference signal resources in the associated downlink reference signal resource set can also be obtained.

[0213] Optionally, the downlink reference signal transmission method provided in the embodiments of this application further includes:

[0214] During the process of the terminal reporting the CSI to the network device, the terminal reports the downlink reference signal resource ID corresponding to the CSI and / or the downlink reference signal resource set ID.

[0215] For example, the terminal performs joint processing on CSI-RS resources in multiple CSI-RS resource sets, reports CSI, and reports the CSI-RS resource set ID and / or CSI-RS resource ID associated with the CSI.

[0216] For instance, the terminal performs joint processing on CSI-RS resource sets / resources with an association relationship, and only reports one of the CSI-RS resource set ID and / or CSI-RS resource ID to identify the CSI as the CSI for joint processing.

[0217] For another example, the terminal performs joint processing on CSI-RS resources with an association relationship, and reports the CSI-RS resource set ID and / or CSI-RS resource ID actually used to identify the CSI as the CSI for joint processing.

[0218] Figure 5 is the second schematic flowchart of the downlink reference signal transmission method provided by the embodiments of the present application. This method is applied to a network-side device, such as Figure 5 As shown, this method includes steps 501 to 502:

[0219] Step 501: 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.

[0220] 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. It should be noted that the downlink reference signal is used for the measurement of channel state information, and the downlink reference signal is, for example, CSI-RS.

[0221] Step 502: The network-side device receives the channel state information CSI reported by the terminal, and the CSI is obtained by the terminal performing joint processing on the downlink reference signal on the downlink reference signal resources corresponding to different hops respectively.

[0222] For example, the network-side device sends CSI-RS to the terminal in a frequency hopping manner, and different hops of the CSI-RS (i.e., multiple hops of the 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 performs joint processing on the CSI-RS resources corresponding to different hops of the CSI-RS to obtain CSI, and reports the CSI to the network-side device.

[0223] In an embodiment of the present application, the network - side device sends downlink reference signals to the terminal in a frequency - hopping manner. Different hops of the downlink reference signals are respectively mapped to different downlink reference signal resources. After the terminal receives the downlink reference signals sent by the network - side device in a frequency - hopping manner, the terminal jointly processes the downlink reference signals on the downlink reference signal resources corresponding to different hops respectively, obtains CSI and reports it to the network - side device, so that the terminal can process downlink reference signals with a large bandwidth and the channel state information reporting overhead is small.

[0224] Optionally, different hops of the downlink reference signals being respectively mapped to different downlink reference signal resources includes:

[0225] Different hops of the downlink reference signals are respectively on different downlink reference signal resources within the same downlink reference signal resource set.

[0226] Optionally, different hops of the downlink reference signals correspond one - to - one with different downlink reference signal resources within the downlink reference signal resource set.

[0227] Optionally, the relationship between different downlink reference signal resources within the same downlink reference signal resource set satisfies at least one of the following:

[0228] The different downlink reference signal resources are respectively configured with starting resource blocks RB and / or bandwidth;

[0229] There is an overlapping bandwidth between downlink reference signal resources adjacent in the frequency domain and / or time domain;

[0230] 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;

[0231] The power control offsets of the different downlink reference signal resources are the same;

[0232] The quasi - co - location QCL of the different downlink reference signal resources is the same;

[0233] The in - RB frequency - domain allocation parameters of the different downlink reference signal resources are the same;

[0234] The frequency - domain density of the different downlink reference signal resources is the same;

[0235] The code - division multiplexing CDM types of the different downlink reference signal resources are the same;

[0236] The scrambling ID of the different downlink reference signal resources is the same.

[0237] Optionally, each of the different downlink reference signal resources is respectively configured or associated with its own hop identification ID.

[0238] Optionally, at least one target hop of the downlink reference signal is associated with two or more downlink reference signal resources within the downlink reference signal resource set.

[0239] Optionally, in the case where at least one of 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 or associated with a corresponding hop.

[0240] Optionally, multiple downlink reference signal resources associated with the same hop satisfy at least one of the following:

[0241] The starting physical resource block (PRB) is the same;

[0242] The number of resource blocks (RBs) is the same;

[0243] The frequency-domain density is the same;

[0244] The number of ports of the downlink reference signal resource is the same;

[0245] The CDM type is the same;

[0246] The power control offset is the same.

[0247] 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 by at least one of the following methods:

[0248] Sort multiple downlink reference signal resources associated with the same hop in time order, 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;

[0249] 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 according to the downlink reference signal resources at the same entry in the downlink reference signal resource lists corresponding to different hops;

[0250] Explicitly configure the at least one first downlink reference signal resource having the first association relationship as a set.

[0251] Optionally, the first association relationship satisfies at least one of the following:

[0252] The at least one first downlink reference signal resource can be used for joint processing of downlink reference signal resources to obtain CSI;

[0253] The at least one first downlink reference signal resource has the same number of ports, and the ports with the same port index among different first downlink reference signal resources are the same port;

[0254] The at least one first downlink reference signal resource has the same QCL;

[0255] There is an overlapping bandwidth between first downlink reference signal resources adjacent in the frequency domain and / or time domain;

[0256] The power control offsets of the at least one first downlink reference signal resource are the same;

[0257] The in-band frequency domain allocation parameters of the at least one first downlink reference signal resource are the same;

[0258] The frequency domain densities of the at least one first downlink reference signal resource are the same;

[0259] The scrambling IDs of the at least one first downlink reference signal resource are the same.

[0260] Optionally, when one of the two or more downlink reference signal resources includes partial downlink reference signal ports, and multiple downlink reference signal resources among the two or more downlink reference signal resources form all the downlink reference signal ports, each downlink reference signal resource group is respectively configured or associated with a corresponding hop, where multiple downlink reference signal resources included in each downlink reference signal resource group form all the downlink reference signal ports.

[0261] 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 by at least one of the following methods:

[0262] Sort the multiple downlink reference signal resource groups associated with the same hop in time order, 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;

[0263] The multiple 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 the downlink reference signal resource groups at the same entry in the downlink reference signal resource group lists corresponding to different hops;

[0264] Explicitly configure the at least one second downlink reference signal resource group having the second association relationship as a set.

[0265] Optionally, the second association relationship satisfies at least one of the following:

[0266] The at least one second downlink reference signal resource group can be used for joint processing of downlink reference signal resources to obtain CSI;

[0267] The at least one second downlink reference signal resource group has the same number of ports, and the ports with the same port index in different second downlink reference signal resource groups are the same port;

[0268] The at least one second downlink reference signal resource group has the same number of downlink reference signal resources;

[0269] There is an overlapping bandwidth between second downlink reference signal resource groups adjacent in the frequency domain and / or time domain.

[0270] Optionally, the method further includes any one of the following:

[0271] The network side device sends first indication information to the terminal, where the first indication information is used to indicate the trigger offset corresponding to each different downlink reference signal resource in the downlink reference signal resource set in the case of aperiodic downlink reference signal hopping;

[0272] 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 hopping.

[0273] Optionally, the second indication information includes at least one of the following:

[0274] Downlink reference signal hopping flag;

[0275] Serving cell identifier;

[0276] BWP identifier;

[0277] Identifier of the downlink reference signal resource set;

[0278] Transmission configuration indication (TCI) state identifier corresponding to the downlink reference signal resource in the downlink reference signal resource set.

[0279] Optionally, the TCI states corresponding to the different downlink reference signals are the same; or, only one TCI state is indicated in the second indication information, and the different downlink reference signals share the same TCI state.

[0280] 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 by one to different downlink reference signal resources within one hop.

[0281] Optionally, different hops of the downlink reference signal are respectively mapped on different downlink reference signal resources, including:

[0282] Different hops of the downlink reference signal are respectively on the downlink reference signal resources within different downlink reference signal resource sets.

[0283] Optionally, each downlink reference signal resource set among the different downlink reference signal resource sets is respectively configured or associated with its own hop ID.

[0284] Optionally, the relationship among multiple downlink reference signal resources within each downlink reference signal resource set among the different downlink reference signal resource sets satisfies at least one of the following: the starting PRB is the same; the number of RBs is the same; the frequency domain density is the same; the number of downlink reference signal ports is the same; the CDM type is the same.

[0285] Optionally, at least one third downlink reference signal resource among the different downlink reference signal resource sets has a third association relationship, where the at least one third downlink reference signal resource is determined by at least one of the following methods:

[0286] Sort multiple downlink reference signal resources within a downlink reference signal resource set in time order, and determine the at least one third downlink reference signal resource according to the multiple downlink reference signal resources in the same time domain order;

[0287] Determine the at least one third downlink reference signal resource according to the downlink reference signal resources with the same resource entry within a downlink reference signal resource set;

[0288] Determine the at least one third downlink reference signal resource from multiple downlink reference signal resources with the same resource identifier within a downlink reference signal resource set;

[0289] Explicitly configure the at least one third downlink reference signal resource with the third association relationship as a set.

[0290] Optionally, the third association relationship satisfies at least one of the following:

[0291] The at least one third downlink reference signal resource can be used for joint processing of downlink reference signal resources to obtain CSI;

[0292] The at least one third downlink reference signal resource has the same number of ports, and ports with the same port index are the same port;

[0293] The QCLs of the at least one third downlink reference signal resource are the same;

[0294] There is an overlapping bandwidth between third downlink reference signal resources that are adjacent in the frequency domain and / or the time domain;

[0295] The power control offsets of the at least one third downlink reference signal resource are the same;

[0296] The in-band frequency domain allocation parameters of the at least one third downlink reference signal resource are the same;

[0297] The frequency domain densities of the at least one third downlink reference signal resource are the same;

[0298] The scrambling ID of the at least one third downlink reference signal resource is the same;

[0299] The CDM types of the at least one third downlink reference signal resource are the same.

[0300] Optionally, the method further includes any one of the following:

[0301] The network side device sends third indication information to the terminal, where the third indication information is used to trigger multiple downlink reference signal resource sets for downlink reference signal hopping;

[0302] 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 hopping.

[0303] Optionally, the fourth indication information includes at least one of the following:

[0304] Downlink reference signal hopping flag;

[0305] Serving cell identifier;

[0306] BWP identifier;

[0307] Identifier of the downlink reference signal resource set;

[0308] TCI state identifier corresponding to the downlink reference signal resource in the downlink reference signal resource set.

[0309] Optionally, there are multiple identifiers of the downlink reference signal resource set, which correspond one by one to different downlink reference signal resource sets;

[0310] Alternatively, the identifier of the downlink reference signal resource set is 1, and the identifier of the 1 downlink reference signal resource set is used for the terminal to activate all downlink reference signal resource sets for hopping.

[0311] Optionally, the TCI state corresponds one-to-one with multiple downlink reference signal resources in a downlink reference signal resource set.

[0312] Optionally, the method further includes: the network device receives the downlink reference signal resource ID corresponding to the CSI reported by the terminal and / or the downlink reference signal resource set ID.

[0313] For example, the network device receives the CSI reported by the terminal, as well as the downlink reference signal resource ID corresponding to the CSI and / or the downlink reference signal resource set ID.

[0314] Figure 6 is the third flowchart of the downlink reference signal transmission method provided by the embodiments of the present application. This method is cooperatively executed by a terminal and a network device. As Figure 6 shown, this method includes steps 601 to 603:

[0315] Step 601, the network 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.

[0316] Step 602, the terminal receives the downlink reference signal sent by the network device in a frequency hopping manner; the terminal jointly processes the downlink reference signals on the downlink reference signal resources corresponding to different hops respectively, to obtain channel state information CSI.

[0317] Step 603, the terminal reports the CSI to the network device; the network device receives the CSI reported by the terminal.

[0318] In the embodiments of the present application, the network 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; after receiving the downlink reference signal sent by the network device in a frequency hopping manner, the terminal jointly processes the downlink reference signals on the downlink reference signal resources corresponding to different hops respectively, obtains CSI and reports it, so that the terminal can process downlink reference signals with a large bandwidth, and the channel state information reporting overhead is small.

[0319] For the downlink reference signal transmission method provided by the embodiments of the present application, the execution subject may be a downlink reference signal transmission device. In the embodiments of the present application, taking the downlink reference signal transmission device executing the downlink reference signal transmission method as an example, the downlink reference signal transmission device provided by the embodiments of the present application is described.

[0320] Figure 7It is one of the schematic structural diagrams of the downlink reference signal transmission device provided by the embodiments of the present application. The downlink reference signal transmission device 700 is applied to a terminal, such as Figure 7 As shown, the downlink reference signal transmission device 700 includes: a first receiving module 701, a processing module 702, and a reporting module 703, where:

[0321] The first receiving module 701 is configured to receive a downlink reference signal sent by a network-side device in a frequency hopping manner, and different hops of the downlink reference signal are respectively mapped to different downlink reference signal resources;

[0322] The processing module 702 is configured to perform joint processing on the downlink reference signals on the downlink reference signal resources corresponding to different hops respectively to obtain channel state information CSI;

[0323] The reporting module 703 is configured to report the CSI to the network-side device.

[0324] In the embodiments of the present application, by receiving the downlink reference signal sent by the network-side device in a frequency hopping manner, different hops of the downlink reference signal are respectively mapped to different downlink reference signal resources, and the downlink reference signals on the downlink reference signal resources corresponding to different hops respectively are jointly processed to obtain CSI and report it, so that the terminal can process the downlink reference signal with a large bandwidth and the channel state information reporting overhead is small.

[0325] Optionally, different hops of the downlink reference signal being respectively mapped to different downlink reference signal resources includes at least one of the following:

[0326] Different hops of the downlink reference signal are respectively on different downlink reference signal resources within the same downlink reference signal resource set;

[0327] Different hops of the downlink reference signal are respectively on the downlink reference signal resources within different downlink reference signal resource sets.

[0328] Optionally, different hops of the downlink reference signal correspond one-to-one to different downlink reference signal resources within the downlink reference signal resource set.

[0329] Optionally, the relationship between different downlink reference signal resources within the same downlink reference signal resource set satisfies at least one of the following:

[0330] The different downlink reference signal resources are respectively configured with starting resource blocks RB and / or bandwidths;

[0331] There is an overlapping bandwidth between downlink reference signal resources adjacent in the frequency domain and / or time domain;

[0332] The number of ports of the different downlink reference signal resources is the same, and the ports with the same port index among the different downlink reference signal resources are the same port;

[0333] The power control offsets of the different downlink reference signal resources are the same;

[0334] The quasi-co-location (QCL) of the different downlink reference signal resources is the same;

[0335] The in-band frequency domain allocation parameters of the different downlink reference signal resources are the same;

[0336] The frequency domain density of the different downlink reference signal resources is the same;

[0337] The code division multiplexing (CDM) types of the different downlink reference signal resources are the same;

[0338] The scrambling ID of the different downlink reference signal resources is the same.

[0339] Optionally, each downlink reference signal resource among the different downlink reference signal resources is respectively configured or associated with its own hop identifier (ID).

[0340] Optionally, at least one target hop of the downlink reference signal is associated with two or more downlink reference signal resources within the downlink reference signal resource set.

[0341] Optionally, when at least one of the two or more downlink reference signal resources includes all the 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;

[0342] Or,

[0343] When one of the two or more downlink reference signal resources includes some of the downlink reference signal ports, and multiple downlink reference signal resources among the two or more downlink reference signal resources form all the downlink reference signal ports, each downlink reference signal resource group is respectively configured or associated with a corresponding hop, where each downlink reference signal resource group includes multiple downlink reference signal resources that form all the downlink reference signal ports.

[0344] Optionally, multiple downlink reference signal resources associated with the same hop satisfy at least one of the following:

[0345] The starting physical resource block (PRB) is the same;

[0346] The number of RBs is the same;

[0347] The frequency domain density is the same;

[0348] The number of ports of the downlink reference signal resources is the same;

[0349] The CDM types are the same;

[0350] The power control offsets are the same.

[0351] 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 by at least one of the following methods:

[0352] Sort the multiple downlink reference signal resources associated with the same hop in time order, 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;

[0353] The 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 according to the downlink reference signal resources at the same entry in the downlink reference signal resource lists corresponding to different hops;

[0354] Explicitly configure the at least one first downlink reference signal resource having the first association relationship as a set.

[0355] Optionally, the first association relationship satisfies at least one of the following:

[0356] The at least one first downlink reference signal resource can be used for joint processing of downlink reference signal resources to obtain CSI;

[0357] The at least one first downlink reference signal resource has the same number of ports, and the ports with the same port index among different first downlink reference signal resources are the same port;

[0358] The QCL of the at least one first downlink reference signal resource is the same;

[0359] There is an overlapping bandwidth between the first downlink reference signal resources adjacent in the frequency domain and / or time domain;

[0360] The power control offsets of the at least one first downlink reference signal resource are the same;

[0361] The in-RB frequency domain allocation parameters of the at least one first downlink reference signal resource are the same;

[0362] The frequency domain density of the at least one first downlink reference signal resource is the same;

[0363] The scrambling IDs of the at least one first downlink reference signal resource are the same.

[0364] 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 by at least one of the following methods:

[0365] Sort multiple downlink reference signal resource groups associated with the same hop in time order, 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;

[0366] 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 at the same entry in the downlink reference signal resource group lists corresponding to different hops;

[0367] Explicitly configure the at least one second downlink reference signal resource group having the second association relationship as a set.

[0368] Optionally, the second association relationship satisfies at least one of the following:

[0369] The at least one second downlink reference signal resource group can be used for joint processing of downlink reference signals to obtain CSI;

[0370] The at least one second downlink reference signal resource group has the same number of ports, and the ports with the same port index in different second downlink reference signal resource groups are the same ports;

[0371] The at least one second downlink reference signal resource group has the same number of downlink reference signal resources;

[0372] There is an overlapping bandwidth between second downlink reference signal resource groups adjacent in the frequency domain and / or time domain.

[0373] Optionally, the first receiving module 701 is further configured to perform any one of the following:

[0374] Receive first indication information sent by the network side device, where the first indication information is used to indicate trigger offsets corresponding to different downlink reference signals in the downlink reference signal resource set in the case of aperiodic downlink reference signal frequency hopping;

[0375] Receive second indication information sent by the network side device, where the second indication information is used to activate or deactivate downlink reference signal frequency hopping.

[0376] Optionally, the second indication information includes at least one of the following:

[0377] Downlink reference signal hopping flag;

[0378] Serving cell identifier;

[0379] BWP identifier;

[0380] Identifier of the downlink reference signal resource set;

[0381] Identifier of the transmission configuration indication (TCI) state corresponding to the downlink reference signal resource in the downlink reference signal resource set.

[0382] Optionally, the TCI states corresponding to the different downlink reference signal resources are the same; or, only one TCI state is indicated in the second indication information, and the different downlink reference signal resources share the same TCI state.

[0383] 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.

[0384] Optionally, different hops of the downlink reference signal are respectively mapped on different downlink reference signal resources, including:

[0385] Different hops of the downlink reference signal are respectively on the downlink reference signal resources within different downlink reference signal resource sets.

[0386] Optionally, each downlink reference signal resource set among the different downlink reference signal resource sets is respectively configured with or associated with its own hop ID.

[0387] Optionally, the relationship among the multiple downlink reference signal resources within each downlink reference signal resource set among the different downlink reference signal resource sets satisfies at least one of the following: the starting PRB is the same; the number of RBs is the same; the frequency-domain density is the same; the number of downlink reference signal ports is the same; the CDM type is the same.

[0388] Optionally, at least one third downlink reference signal resource among the different downlink reference signal resource sets has a third association relationship, where the at least one third downlink reference signal resource is determined by at least one of the following methods:

[0389] Sort the multiple downlink reference signal resources within the downlink reference signal resource set in time order, and determine the at least one third downlink reference signal resource according to the multiple downlink reference signal resources with the same time domain order;

[0390] Determine 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;

[0391] Determine the at least one third downlink reference signal resource from multiple downlink reference signal resources with the same resource identifier in the downlink reference signal resource set;

[0392] Explicitly configure at least one third downlink reference signal resource having a third association relationship as a set.

[0393] Optionally, the third association relationship satisfies at least one of the following:

[0394] The at least one third downlink reference signal resource can be used for joint processing of downlink reference signal resources to obtain CSI;

[0395] The at least one third downlink reference signal resource has the same number of ports, and ports with the same port index are the same port;

[0396] The at least one third downlink reference signal resource has the same QCL;

[0397] There is an overlapping bandwidth between third downlink reference signal resources adjacent in the frequency domain and / or time domain;

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

[0399] The in-band frequency domain allocation parameters of the at least one third downlink reference signal resource are the same;

[0400] The frequency domain density of the at least one third downlink reference signal resource is the same;

[0401] The scrambling ID of the at least one third downlink reference signal resource is the same;

[0402] The CDM type of the at least one third downlink reference signal resource is the same.

[0403] Optionally, the first receiving module 701 is further configured to perform any one of the following:

[0404] Receive third indication information sent by the network side device, where the third indication information is used to trigger multiple downlink reference signal resource sets for downlink reference signal hopping;

[0405] Receive fourth indication information sent by the network side device, where the fourth indication information is used to activate or deactivate downlink reference signal hopping.

[0406] Optionally, the fourth indication information includes at least one of the following:

[0407] Downlink reference signal hopping flag;

[0408] Serving cell identifier;

[0409] BWP identifier;

[0410] Identifier of the downlink reference signal resource set;

[0411] Identifier of the TCI state corresponding to the downlink reference signal resource in the downlink reference signal resource set.

[0412] Optionally, there are multiple identifiers of the downlink reference signal resource set, which correspond one by one to different downlink reference signal resource sets;

[0413] Alternatively, there is 1 identifier of the downlink reference signal resource set, and the identifier of the 1 downlink reference signal resource set is used for the terminal to activate all the downlink reference signal resource sets for hopping.

[0414] Optionally, the TCI state corresponds one by one to multiple downlink reference signal resources in a downlink reference signal resource set.

[0415] Optionally, the reporting module 703 is further configured to: report the downlink reference signal resource ID and / or the downlink reference signal resource set ID corresponding to the CSI during the process of reporting the CSI to the network side device.

[0416] The downlink reference signal transmission device 700 in the embodiments of the present application may be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. This electronic device may be a terminal or other devices other than the terminal. Exemplarily, the terminal may include, but is not limited to, the types of the terminal 11 listed above, and other devices may be a server, a Network Attached Storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0417] The downlink reference signal transmission device 700 provided by the embodiments of the present application can implement Figure 2 each process implemented by the method embodiment shown, and achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0418] Figure 8 is the second structural schematic diagram of the downlink reference signal transmission device provided by the embodiments of the present application. The downlink reference signal transmission device 800 is applied to a network side device, such as Figure 8 shown, the downlink reference signal transmission device 800 includes: a sending module 801 and a second receiving module 802, where:

[0419] A transmitting module 801, configured to transmit downlink reference signals to a terminal in a frequency hopping manner, where different hops of the downlink reference signals are respectively mapped to different downlink reference signal resources;

[0420] A second receiving module 802, 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 the downlink reference signal resources corresponding to different hops respectively.

[0421] In an embodiment of the present application, downlink reference signals are transmitted to a terminal in a frequency hopping manner, and different hops of the downlink reference signals are respectively mapped to different downlink reference signal resources. After the terminal receives the downlink reference signals transmitted by the network side device in a frequency hopping manner, the terminal performs joint processing on the downlink reference signals on the downlink reference signal resources corresponding to different hops respectively, obtains CSI and reports it to the network side device, so that the terminal can process downlink reference signals with a large bandwidth, and the channel state information reporting overhead is small.

[0422] Optionally, different hops of the downlink reference signals being respectively mapped to different downlink reference signal resources includes at least one of the following:

[0423] Different hops of the downlink reference signals are respectively on different downlink reference signal resources within the same downlink reference signal resource set;

[0424] Different hops of the downlink reference signals are respectively on downlink reference signal resources within different downlink reference signal resource sets.

[0425] Optionally, different hops of the downlink reference signals correspond one-to-one to different downlink reference signal resources within the downlink reference signal resource set.

[0426] Optionally, the relationship between different downlink reference signal resources within the same downlink reference signal resource set satisfies at least one of the following:

[0427] The different downlink reference signal resources are respectively configured with starting resource blocks RB and / or bandwidth;

[0428] There is an overlapping bandwidth between downlink reference signal resources adjacent in the frequency domain and / or time domain;

[0429] The different downlink reference signal resources have the same number of ports, and ports with the same port index in different downlink reference signal resources are the same port;

[0430] The power control offsets of the different downlink reference signal resources are the same;

[0431] The quasi co-location QCL of the different downlink reference signal resources is the same;

[0432] The frequency-domain allocation parameters within the RBs of the different downlink reference signal resources are the same;

[0433] The frequency-domain density of the different downlink reference signal resources is the same;

[0434] The CDM (Code Division Multiplexing) types of the different downlink reference signal resources are the same;

[0435] The scrambling IDs of the different downlink reference signal resources are the same.

[0436] Optionally, at least one target hop of the downlink reference signal is associated with two or more downlink reference signal resources within the downlink reference signal resource set.

[0437] Optionally, when at least one of the two or more downlink reference signal resources includes all the 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;

[0438] Or,

[0439] When one of the two or more downlink reference signal resources includes some of the downlink reference signal ports, and multiple of the two or more downlink reference signal resources together form all the downlink reference signal ports, each group of downlink reference signal resources is respectively configured or associated with a corresponding hop, where each group of downlink reference signal resources includes multiple downlink reference signal resources that together form all the downlink reference signal ports.

[0440] Optionally, at least one first downlink reference signal resource among the different downlink reference signal resources has a first association relationship, where the at least one first downlink reference signal resource is determined by at least one of the following methods:

[0441] Sort the multiple downlink reference signal resources associated with the same hop in time order, 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;

[0442] The 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 the downlink reference signal resources at the same entry in the downlink reference signal resource lists corresponding to different hops;

[0443] Explicitly configure the at least one first downlink reference signal resource having the first association relationship as a set.

[0444] Optionally, when one of the two or more downlink reference signal resources contains partial 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. Among them, multiple downlink reference signal resources included in each downlink reference signal resource group constitute all downlink reference signal ports.

[0445] Optionally, at least one second downlink reference signal resource group among the different downlink reference signal resources has a second association relationship. The at least one second downlink reference signal resource group is determined by at least one of the following methods:

[0446] Sort multiple downlink reference signal resource groups associated with the same hop in time order, and determine the at least one second downlink reference signal resource group according to multiple downlink reference signal resource groups in the same time domain order;

[0447] 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 downlink reference signal resource groups at the same entry in downlink reference signal resource group lists corresponding to different hops;

[0448] Explicitly configure the at least one second downlink reference signal resource group having the second association relationship as a set.

[0449] Optionally, the sending module 801 is further configured to perform any one of the following:

[0450] Send first indication information to the terminal, where 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 hopping;

[0451] Send second indication information to the terminal, where the second indication information is used to activate or deactivate downlink reference signal hopping.

[0452] Optionally, different hops of the downlink reference signal are respectively mapped on different downlink reference signal resources, including:

[0453] Different hops of the downlink reference signal are respectively on downlink reference signal resources in different downlink reference signal resource sets.

[0454] Optionally, each of the different downlink reference signal resource sets is respectively configured with or associated with its own hop ID.

[0455] Optionally, at least one third downlink reference signal resource among the different downlink reference signal resource sets has a third association relationship, where the at least one third downlink reference signal resource is determined by at least one of the following methods:

[0456] Sort the multiple downlink reference signal resources in the downlink reference signal resource set by time, and determine the at least one third downlink reference signal resource according to the multiple downlink reference signal resources in the same time domain order;

[0457] Determine the at least one third downlink reference signal resource according to the downlink reference signal resources with the same resource entry in the downlink reference signal resource set;

[0458] Determine the at least one third downlink reference signal resource from the multiple downlink reference signal resources with the same resource identifier in the downlink reference signal resource set;

[0459] Explicitly configure the at least one third downlink reference signal resource having the third association relationship as a set.

[0460] Optionally, the sending module 801 is further configured to perform any one of the following:

[0461] Send third indication information to the terminal, where the third indication information is used to trigger multiple downlink reference signal resource sets for downlink reference signal hopping;

[0462] Send fourth indication information to the terminal, where the fourth indication information is used to activate or deactivate downlink reference signal hopping.

[0463] Optionally, the second receiving module 802 is further configured to: receive the downlink reference signal resource ID and / or the downlink reference signal resource set ID corresponding to the CSI reported by the terminal.

[0464] The downlink reference signal transmission device 800 in the embodiments of the present application may be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. This electronic device may be a network-side device or other devices other than network-side devices. Exemplarily, the network-side device may include, but is not limited to, the types of the network-side device 12 listed above, and the embodiments of the present application do not make specific limitations.

[0465] The downlink reference signal transmission device 800 provided by the embodiments of the present application can achieve Figure 5The various processes implemented by the method embodiments shown achieve the same technical effects. To avoid repetition, they will not be elaborated here.

[0466] An embodiment of the present application further provides a communication device. Figure 9 It is a schematic structural diagram of the communication device provided by the embodiment of the present application. As Figure 9 shown, an embodiment of the present application further provides a communication device 900, including a processor 901 and a memory 902. A program or instruction that can run on the processor 901 is stored on the memory 902. For example, when the communication device 900 is a terminal, when the program or instruction is executed by the processor 901, it implements the above Figure 2 steps of the method embodiments shown, and can achieve the same technical effects. When the communication device 900 is a network-side device, when the program or instruction is executed by the processor 901, it implements the above Figure 5 steps of the method embodiments shown, and can achieve the same technical effects. To avoid repetition, they will not be elaborated here.

[0467] An embodiment of the present application further provides a terminal, including a processor and a communication interface. The communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the steps in the method embodiments as Figure 2 shown. This terminal embodiment corresponds to the above terminal-side method embodiments. Each implementation process and implementation manner of the above method embodiments can be applied to this terminal embodiment, and can achieve the same technical effects.

[0468] An embodiment of the present application further provides a terminal. Figure 10 It is a schematic hardware structure diagram of the terminal provided by the embodiment of the present application. As Figure 10 shown, the terminal 1000 includes, but is not limited to: at least some components such as 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.

[0469] Those skilled in the art can understand that the terminal 1000 may further include a power supply (such as a battery) for supplying power to each component. The power supply can be logically connected to the processor 1010 through a power management system, so as to implement functions such as management of charging, discharging, and power consumption management through the power management system. Figure 10 The terminal structure shown in does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0470] It should be understood that in the embodiments of the present application, the input unit 1004 may include a Graphics Processing Unit (GPU) 10041 and a microphone 10042. The graphics processing unit 10041 processes the image data of static pictures or videos obtained by an image capturing device (such as a camera) in the video capture mode or the 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, for example, a liquid crystal display, an organic light emitting diode, etc. The user input unit 1007 includes at least one of a touch panel 10071 and other input devices 10072. The touch panel 10071 is also referred to as a touch screen. The touch panel 10071 may include two parts: a touch detection device and a touch controller. The 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, a joystick, which will not be elaborated herein.

[0471] In the embodiments of the present application, after receiving downlink data from a network-side device, the radio frequency unit 1001 may transmit it to the processor 1010 for processing; in addition, the radio frequency unit 1001 may send uplink data to the network-side device. Generally, the radio frequency unit 1001 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0472] The memory 1009 can be used to store software programs or instructions as well as 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. Among them, the first storage area may store an operating system, application programs 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 (DDR SDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM), and a direct rambus random access memory (DRRAM). The memory 1009 in the embodiments of the present application includes but is not limited to these and any other suitable types of memories.

[0473] The processor 1010 may include one or more processing units; optionally, the processor 1010 integrates an application processor and a modem processor. Among them, the application processor mainly processes operations related to the operating system, user interface, and application programs, etc., and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above-mentioned modem processor may not be integrated into the processor 1010 either.

[0474] Among them, the radio frequency unit 1001 is used for the terminal to receive the downlink reference signal sent by the network-side device in a frequency hopping manner, and different hops of the downlink reference signal are respectively mapped on different downlink reference signal resources;

[0475] The processor 1010 is used to jointly process the downlink reference signals on the downlink reference signal resources corresponding to different hops to obtain channel state information CSI;

[0476] The radio frequency unit 1001 is further configured to report the CSI to the network-side device.

[0477] It can be understood that the implementation processes of the implementation manners mentioned in this embodiment can refer to Figure 2 the relevant descriptions of the method embodiments shown, and achieve the same or corresponding technical effects. To avoid repetition, they will not be elaborated here.

[0478] This application embodiment further provides a network-side device, including a processor and a communication interface. The communication interface is coupled to the processor. The processor is configured to run programs or instructions to implement the steps of the method embodiments as Figure 5 shown. This network-side device embodiment corresponds to the above network-side device method embodiments. The implementation processes and implementation manners of the above method embodiments can all be applied to this network-side device embodiment and can achieve the same technical effects.

[0479] This application embodiment further provides a network-side device. Figure 11 It is a schematic hardware structure diagram of the network-side device provided by this application embodiment. As Figure 11 shown, 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. After processing the received information, the radio frequency device 112 sends it out through the antenna 111.

[0480] The methods executed by the network-side device in the above embodiments can be implemented in the baseband device 113, and the baseband device 113 includes a baseband processor.

[0481] The baseband device 113 may include, for example, at least one baseband board, and a plurality of chips are arranged on the baseband board. As Figure 11 shown, one of the chips is, for example, a baseband processor, which is connected to the memory 115 through a bus interface to call the programs in the memory 115 and execute the operations of the network device shown in the above method embodiments.

[0482] The network-side device may further include a network interface 116, and this interface is, for example, a Common Public Radio Interface (CPRI).

[0483] Specifically, the network-side device 1100 in the embodiments of the present application further includes: instructions or programs stored in the memory 115 and executable on the processor 114. The processor 114 invokes the instructions or programs in the memory 115 to execute Figure 5 the steps of the method embodiments shown, and achieve the same technical effects. To avoid repetition, they will not be elaborated here.

[0484] The embodiments of the present application further provide a readable storage medium. Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the various processes of the above-mentioned method embodiments for downlink reference signal transmission are implemented, and the same technical effects can be achieved. To avoid repetition, they will not be elaborated here.

[0485] Among them, the processor is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disks, or optical discs, etc. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0486] The embodiments of the present application further provide a chip. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-mentioned method embodiments for downlink reference signal transmission, and the same technical effects can be achieved. To avoid repetition, they will not be elaborated here.

[0487] It should be understood that the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, system chip, chip system, or system-on-chip, etc.

[0488] The embodiments of the present application further provide a computer program / program product. The computer program / program product 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 method embodiments for downlink reference signal transmission, and the same technical effects can be achieved. To avoid repetition, they will not be elaborated here.

[0489] The embodiments of the present application further provide a downlink reference signal transmission system, including: a terminal and a network-side device. The terminal can be used to execute as Figure 2 the steps of the method embodiments shown, and the network-side device can be used to execute as Figure 5 the steps of the method embodiments shown.

[0490] It should be noted that in this text, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including such 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 reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0491] From the description of the above embodiments, those skilled in the art can clearly understand that the above-described example methods can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disc, etc.) and includes several instructions for causing a terminal or a network-side device to execute the methods described in various embodiments of the present application.

[0492] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms of embodiments without departing from the purpose of the present application and the scope protected by the claims. All these embodiments fall within the protection scope of the present application.

Claims

1. A downlink reference signal transmission method, characterized in that, It includes: The terminal receives the downlink reference signal sent by the network side device in a frequency hopping manner, and different hops of the downlink reference signal are respectively mapped on different downlink reference signal resources; The terminal jointly processes the downlink reference signals on the downlink reference signal resources corresponding to different hops respectively to obtain the channel state information CSI; The terminal reports the CSI to the network side device.

2. The downlink reference signal transmission method according to claim 1, wherein That different hops of the downlink reference signal are respectively mapped on different downlink reference signal resources includes at least one of the following: Different hops of the downlink reference signal are respectively on different downlink reference signal resources within the same downlink reference signal resource set; Different hops of the downlink reference signal are respectively on the downlink reference signal resources within different downlink reference signal resource sets.

3. The downlink reference signal transmission method according to claim 2, wherein The relationship between different downlink reference signal resources within the same downlink reference signal resource set satisfies at least one of the following: The different downlink reference signal resources are respectively configured with a starting resource block RB and / or bandwidth; There is an overlapping bandwidth between downlink reference signal resources adjacent 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 QCL of the different downlink reference signal resources is the same; The in-band frequency domain allocation parameters of the different downlink reference signal resources are the same; The frequency domain density of the different downlink reference signal resources is the same; The code division multiplexing CDM types of the different downlink reference signal resources are the same; The scrambling ID of the different downlink reference signal resources is the same.

4. The downlink reference signal transmission method according to claim 2, wherein Each downlink reference signal resource in the different downlink reference signal resources is respectively configured or associated with its own hop identifier ID.

5. The downlink reference signal transmission method according to claim 2, characterized in that At least one target hop of the downlink reference signal is associated with two or more downlink reference signal resources within the downlink reference signal resource set. When at least one of the two or more downlink reference signal resources contains all the 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, When one of the two or more downlink reference signal resources contains partial downlink reference signal ports and multiple downlink reference signal resources among the two or more downlink reference signal resources form all the downlink reference signal ports, each downlink reference signal resource group is respectively configured or associated with a corresponding hop, where each downlink reference signal resource group includes multiple downlink reference signal resources that form all the downlink reference signal ports.

6. The downlink reference signal transmission method according to claim 5, characterized in that, Multiple downlink reference signal resources associated with the same hop satisfy at least one of the following: 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 the downlink reference signal resource is the same; The CDM type is the same; The power control offset is the same.

7. The downlink reference signal transmission method according to claim 5 or 6, characterized in that At least one first downlink reference signal resource among the different downlink reference signal resources has a first association relationship, where 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 in time order, 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; Multiple downlink reference signal resources associated with the same hop are associated to form a downlink reference signal resource list, and the at least one first downlink reference signal resource is determined according to the downlink reference signal resources at the same entry in the downlink reference signal resource lists corresponding to different hops; Explicitly configure the at least one first downlink reference signal resource having the first association relationship as a set.

8. The downlink reference signal transmission method according to claim 7, characterized in that The first association relationship satisfies at least one of the following: The at least one first downlink reference signal resource can be used for joint processing of downlink reference signal resources to obtain CSI; The at least one first downlink reference signal resource has the same number of ports, and the ports with the same port index of different first downlink reference signal resources are the same port; The at least one first downlink reference signal resource has the same QCL; There is an overlapping bandwidth between first downlink reference signal resources adjacent in the frequency domain and / or time domain; The power control offsets of the at least one first downlink reference signal resource are the same; The frequency domain allocation parameters within the RB of the at least one first downlink reference signal resource are the same; The frequency domain densities of the at least one first downlink reference signal resource are the same; The scrambling ID of the at least one first downlink reference signal resource is the same.

9. The downlink reference signal transmission method according to claim 5, characterized in that 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 in time order, 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; Multiple downlink reference signal resource groups associated with the same hop are associated to form a downlink reference signal resource group list, and the at least one second downlink reference signal resource group is determined according to the downlink reference signal resource groups at the same entry in the downlink reference signal resource group lists corresponding to different hops; Explicitly configure the at least one second downlink reference signal resource group having the second association relationship as a set.

10. The downlink reference signal transmission method 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 can be used for joint processing of downlink reference signal resources to obtain CSI; The at least one second downlink reference signal resource group has the same number of ports, and the ports with the same port index of 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 an overlapping bandwidth between second downlink reference signal resource groups adjacent in the frequency domain and / or time domain.

11. The downlink reference signal transmission method according to any one of claims 3 to 10, characterized in that The method further includes any one of the following: The terminal receives first indication information sent by the network side device, where the first indication information is used to indicate, in the case of aperiodic downlink reference signal hopping, the respective trigger offsets corresponding to different downlink reference signal resources within the downlink reference signal resource set; The terminal receives second indication information sent by the network side device, where the second indication information is used to activate or deactivate downlink reference signal hopping.

12. The downlink reference signal transmission method according to claim 11, wherein The second indication information includes at least one of the following: Downlink reference signal hopping flag; Serving cell identifier; BWP identifier; Identifier of the downlink reference signal resource set; Identifier of the transmission configuration indication state (TCI state) corresponding to the downlink reference signal resource within the downlink reference signal resource set.

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

14. The downlink reference signal transmission method according to claim 2, wherein At least one third downlink reference signal resource among different downlink reference signal resource sets has a third association relationship, where the at least one third downlink reference signal resource is determined by at least one of the following methods: Sort the multiple downlink reference signal resources within the downlink reference signal resource set in time order, and determine the at least one third downlink reference signal resource based on the multiple downlink reference signal resources in the same time domain order; Determine the at least one third downlink reference signal resource based on the downlink reference signal resources with the same resource entry within the downlink reference signal resource set; Determine the at least one third downlink reference signal resource from multiple downlink reference signal resources within the downlink reference signal resource set that have the same resource identifier; Explicitly configure the at least one third downlink reference signal resource having the third association relationship as a set.

15. The downlink reference signal transmission method 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 can be used for joint processing of downlink reference signal resources 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 an overlapping bandwidth between third downlink reference signal resources adjacent in the frequency domain and / or time domain; The power control offsets of the at least one third downlink reference signal resource are the same; The frequency domain allocation parameters within the RB of the at least one third downlink reference signal resource are the same; The frequency domain density of the at least one third downlink reference signal resource is the same; The scrambling ID of the at least one third downlink reference signal resource is the same; The CDM type of the at least one third downlink reference signal resource is the same.

16. The downlink reference signal transmission method according to any one of claims 3 to 15, characterized in that, The method further includes any one of the following: The terminal receives third indication information sent by the network side device, where the third indication information is used to trigger a plurality of downlink reference signal resource sets for downlink reference signal hopping; The terminal receives fourth indication information sent by the network side device, where the fourth indication information is used to activate or deactivate downlink reference signal hopping.

17. The downlink reference signal transmission method according to claim 16, characterized in that, The fourth indication information includes at least one of the following: Downlink reference signal hopping flag; Serving cell identifier; BWP identifier; Identifier of the downlink reference signal resource set; TCI state identifier corresponding to the downlink reference signal resource in the downlink reference signal resource set.

18. The downlink reference signal transmission method according to any one of claims 1 to 17, characterized in that, The method further includes: During the process of the terminal reporting the CSI to the network side device, the terminal reports the downlink reference signal resource ID corresponding to the CSI and / or the downlink reference signal resource set ID.

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

20. The downlink reference signal transmission method according to claim 19, wherein That different hops of the downlink reference signals are respectively mapped to different downlink reference signal resources includes at least one of the following: Different hops of the downlink reference signals are respectively on different downlink reference signal resources within the same downlink reference signal resource set; Different hops of the downlink reference signals are respectively on the downlink reference signal resources within different downlink reference signal resource sets.

21. The downlink reference signal transmission method according to claim 20, wherein The relationship between different downlink reference signal resources within 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 an overlapping bandwidth between downlink reference signal resources adjacent 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 QCL of the different downlink reference signal resources is the same; The frequency domain allocation parameters within the RB of the different downlink reference signal resources are the same; The frequency domain density of the different downlink reference signal resources is the same; The code division multiplexing CDM types of the different downlink reference signal resources are the same; The scrambling ID of the different downlink reference signal resources is the same.

22. The downlink reference signal transmission method according to claim 20, characterized in that At least one target hop of the downlink reference signal is associated with two or more downlink reference signal resources within the downlink reference signal resource set. When at least one of the two or more downlink reference signal resources includes all the 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, When one of the two or more downlink reference signal resources contains partial downlink reference signal ports, and multiple downlink reference signal resources among the two or more downlink reference signal resources form all the downlink reference signal ports, each downlink reference signal resource group is respectively configured or associated with a corresponding hop. Among them, multiple downlink reference signal resources included in each downlink reference signal resource group form all the downlink reference signal ports.

23. The downlink reference signal transmission method according to claim 22, characterized in that, At least one first downlink reference signal resource among the different downlink reference signal resources has a first association relationship, where 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 in time order, 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; 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 according to the downlink reference signal resources at the same entry in the downlink reference signal resource lists corresponding to different hops; Explicitly configure the at least one first downlink reference signal resource having the first association relationship as a set.

24. The downlink reference signal transmission method 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 in time order, 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; 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 at the same entry in the downlink reference signal resource group lists corresponding to different hops; Explicitly configure the at least one second downlink reference signal resource group having the second association relationship as a set.

25. The downlink reference signal transmission method according to any one of claims 21 to 24, characterized in that, The method further includes any one of the following: The network side device sends first indication information to the terminal, where the first indication information is used to indicate the trigger offset corresponding to each different downlink reference signal resource within the downlink reference signal resource set in the case of aperiodic downlink reference signal hopping; 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 hopping.

26. The downlink reference signal transmission method according to claim 20, wherein At least one third downlink reference signal resource among the different downlink reference signal resource sets has a third association relationship, where 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 by time, and determine the at least one third downlink reference signal resource according to the multiple downlink reference signal resources in the same time domain order; Determine the at least one third downlink reference signal resource according to the downlink reference signal resources with the same resource entry in the downlink reference signal resource set; Determine the at least one third downlink reference signal resource from multiple downlink reference signal resources in the downlink reference signal resource set that have the same resource identifier; Explicitly configure at least one third downlink reference signal resource having a third association relationship as a set.

27. The downlink reference signal transmission method according to any one of claims 21 to 26, characterized in that, The method further includes any one of the following: The network side device sends third indication information to the terminal, where the third indication information is used to trigger multiple downlink reference signal resource sets for downlink reference signal hopping; 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 hopping.

28. The downlink reference signal transmission method according to any one of claims 19 to 27, characterized in that, The method further includes: The network side device receives the downlink reference signal resource ID and / or the downlink reference signal resource set ID corresponding to the CSI reported by the terminal.

29. A downlink reference signal transmission device, characterized in that, Includes: A first receiving module, configured to receive a downlink reference signal sent by a network side device in a 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 respectively to obtain channel state information CSI; A reporting module, configured 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 configured to perform any one of the following: Receive first indication information sent by the network side device, where the first indication information is used to indicate the trigger offset corresponding to different downlink reference signal resources in the downlink reference signal resource set in the case of non-periodic downlink reference signal hopping; Receive second indication information sent by the network side device, where the second indication information is used to activate or deactivate downlink reference signal hopping.

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

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

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

34. The downlink reference signal transmission device according to claim 33, wherein The sending module is further configured to perform any one of the following: Send first indication information to the terminal, where the first indication information is used to indicate the trigger offset corresponding to different downlink reference signal resources in the downlink reference signal resource set in the case of aperiodic downlink reference signal hopping; Send second indication information to the terminal, where the second indication information is used to activate or deactivate downlink reference signal hopping.

35. The downlink reference signal transmission device according to claim 33 or 34, characterized in that, The sending module is further configured to perform any one of the following: Send third indication information to the terminal, where the third indication information is used to trigger a plurality of downlink reference signal resource sets for downlink reference signal hopping; Send fourth indication information to the terminal, where the fourth indication information is used to activate or deactivate downlink reference signal hopping.

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

37. A terminal, characterized in that, Comprising a processor and a memory, the memory stores a program or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the downlink reference signal transmission method according to any one of claims 1 to 18 are implemented.

38. A network-side device, characterized in that, Comprising a processor and a memory, the memory stores a program or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the downlink reference signal transmission method according to any one of claims 19 to 28 are implemented.

39. A readable storage medium, characterized in that, The program or instructions are stored on the readable storage medium, and when the program or instructions are executed by the processor, the downlink reference signal transmission method according to any one of claims 1 to 18 is implemented, or the steps of the downlink reference signal transmission method according to any one of claims 19 to 28 are implemented.

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