Tracking reference signal transmission method, device and equipment

Abstract

The invention discloses a transmission method, device and equipment of a tracking reference signal, and belongs to the field of communication, and the transmission method of the tracking reference signal in the embodiment of the invention comprises the steps that a terminal receives at least one TRS; the terminal performs time-frequency tracking based on the at least one TRS; wherein the TRS satisfies at least one of the following conditions: the TRS occupies at least one first time domain unit and at least one second time domain unit, and the second time domain unit comprises at least one first time domain unit; the TRS corresponds to at least one first sequence, and the first sequence is used for multiplexing the TRS; the TRS corresponds to at least one first frequency domain range; the TRS corresponds to at least one repetition. According to the embodiment of the invention, a more flexible TRS is designed, the time-frequency tracking performance of the TRS can be improved, and the resource overhead of the TRS can also be reduced.

Description

Technical Field

[0001] This application relates to the field of communications, and more particularly, to a method, apparatus, and device for transmitting tracking reference signals. Background Art

[0002] In a New Radio (NR) system, a Tracking Reference Signal (TRS) is introduced, and a terminal can perform time-frequency tracking based on the TRS, including measurements of parameters such as timing, delay spread, frequency offset, and Doppler spread. Then, for some scenarios of future communications (such as 6G communications), for example, scenarios with higher mobile speeds, large bandwidths, etc., the current TRS measurement performance, overhead, etc. may be difficult to handle the above scenarios. How to improve the TRS transmission performance is a problem that needs to be solved. Summary of the Invention

[0003] Embodiments of this application provide a method, apparatus, and device for transmitting tracking reference signals, which can solve the problem of insufficient current TRS transmission performance.

[0004] In a first aspect, a method for transmitting a tracking reference signal is provided, including:

[0005] A terminal receives at least one tracking reference signal TRS;

[0006] The terminal performs time-frequency tracking based on the at least one TRS;

[0007] Wherein, the TRS satisfies at least one of the following:

[0008] The TRS occupies at least one first time-domain unit and at least one second time-domain unit, and at least one of the first time-domain units is included in the second time-domain unit;

[0009] The TRS corresponds to at least one first sequence, and the first sequence is used for multiplexing of the TRS;

[0010] The TRS corresponds to at least one first frequency-domain range;

[0011] The TRS corresponds to at least one repetition.

[0012] In a second aspect, a method for transmitting a tracking reference signal is provided, including:

[0013] A network-side device transmits at least one tracking reference signal TRS;

[0014] Wherein, the at least one TRS is used for time-frequency tracking;

[0015] Wherein, the TRS satisfies at least one of the following:

[0016] The TRS occupies at least one first time domain unit and at least one second time domain unit, and at least one of the first time domain units is included in the second time domain unit;

[0017] The TRS corresponds to at least one first sequence, and the first sequence is used for multiplexing of the TRS;

[0018] The TRS corresponds to at least one first frequency domain range;

[0019] The TRS corresponds to at least one repetition.

[0020] In a third aspect, a transmission device for a tracking reference signal is provided, including:

[0021] A transceiver unit, configured to receive at least one tracking reference signal (TRS);

[0022] A processing unit, configured to perform time-frequency tracking based on the at least one TRS;

[0023] Wherein, the TRS satisfies at least one of the following:

[0024] The TRS occupies at least one first time domain unit and at least one second time domain unit, and at least one of the first time domain units is included in the second time domain unit;

[0025] The TRS corresponds to at least one first sequence, and the first sequence is used for multiplexing of the TRS;

[0026] The TRS corresponds to at least one first frequency domain range;

[0027] The TRS corresponds to at least one repetition.

[0028] In a fourth aspect, a transmission device for a tracking reference signal is provided, including:

[0029] A transceiver unit, configured to transmit at least one tracking reference signal (TRS);

[0030] Wherein, the TRS satisfies at least one of the following:

[0031] The TRS occupies at least one first time domain unit and at least one second time domain unit, and at least one of the first time domain units is included in the second time domain unit;

[0032] The TRS corresponds to at least one first sequence, and the first sequence is used for multiplexing of the TRS;

[0033] The TRS corresponds to at least one first frequency domain range;

[0034] The TRS corresponds to at least one repetition.

[0035] In a fifth aspect, a terminal is provided, which includes a transceiver, a processor, and a memory. The memory stores a program or instructions that can run on the processor. When the program or instructions are executed by the processor, the steps of the method described in the first aspect are implemented.

[0036] In a sixth aspect, a terminal is provided, which includes a processor and a communication interface;

[0037] Wherein, the communication interface is used to receive at least one tracking reference signal (TRS); the processor is used to perform time-frequency tracking based on the at least one TRS;

[0038] Wherein, the TRS satisfies at least one of the following:

[0039] The TRS occupies at least one first time-domain unit and at least one second time-domain unit, and at least one of the first time-domain units is included in the second time-domain unit;

[0040] The TRS corresponds to at least one first sequence, and the first sequence is used for multiplexing of the TRS;

[0041] The TRS corresponds to at least one first frequency-domain range;

[0042] The TRS corresponds to at least one repetition.

[0043] In a seventh aspect, a network-side device is provided, which includes a transceiver, a processor, and a memory. The memory stores a program or instructions that can run on the processor. When the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0044] In an eighth aspect, a network-side device is provided, which includes a processor and a communication interface;

[0045] Wherein, the communication interface is used to send at least one tracking reference signal (TRS);

[0046] Wherein, the TRS satisfies at least one of the following:

[0047] The TRS occupies at least one first time-domain unit and at least one second time-domain unit, and at least one of the first time-domain units is included in the second time-domain unit;

[0048] The TRS corresponds to at least one first sequence, and the first sequence is used for multiplexing of the TRS;

[0049] The TRS corresponds to at least one first frequency-domain range;

[0050] The TRS corresponds to at least one repetition.

[0051] In a ninth aspect, a readable storage medium is provided, on which a program or instructions are stored, and when the program or instructions are 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.

[0052] 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.

[0053] In an eleventh aspect, a chip is provided, which includes a processor and a communication interface. The communication interface is coupled to the processor, and the processor is used to run a program or instructions to implement the method described in the first aspect, or to implement the method described in the second aspect.

[0054] 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 for transmitting a tracking reference signal described in the first aspect or the second aspect.

[0055] In the embodiments of the present application, the TRS satisfies at least one of the following: the TRS occupies at least one first time-domain unit and at least one second time-domain unit, the TRS corresponds to at least one first sequence, the TRS corresponds to at least one first frequency-domain range, and the TRS corresponds to at least one repetition. Specifically, the embodiments of the present application design a more flexible TRS from at least one of the aspects of time domain, frequency domain, and code domain, which can improve the time-frequency tracking performance of the TRS and also reduce the resource overhead of the TRS. Description of the Drawings

[0056] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0057] Figure 1 It is a schematic diagram of a communication system architecture provided by an embodiment of the present application.

[0058] Figure 2 It is a schematic diagram of a TRS structure provided by the present application.

[0059] Figure 3 It is a schematic flowchart of a method for transmitting a tracking reference signal provided according to an embodiment of the present application.

[0060] Figures 4 to 9 They are schematic diagrams of the TRS resources provided according to the embodiments of the present application.

[0061] Figure 10 It is a schematic block diagram of a transmission device for tracking reference signals provided according to the embodiments of the present application.

[0062] Figure 11 It is a schematic block diagram of another transmission device for tracking reference signals provided according to the embodiments of the present application.

[0063] Figure 12 It is a schematic block diagram of a communication device provided according to the embodiments of the present application.

[0064] Figure 13 It is a schematic diagram of the hardware structure of a terminal provided according to the embodiments of the present application.

[0065] Figure 14 It is a schematic block diagram of a network-side device provided according to the embodiments of the present application. Detailed implementation manners

[0066] Next, the technical solutions in the embodiments of the present application will be clearly described with reference to 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. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0067] The terms "first", "second", etc. in the present 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 the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are usually of the same category, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "or" in the present 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 an "or" relationship between the associated objects before and after.

[0068] 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.

[0069] It should be noted that the technologies described in the embodiments of this application are not limited to the Ambient Internet of Things (IoT) system, but can also be used in other wireless communication systems, such as Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, 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), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), Bluetooth systems, or other systems. The terms "system" and "network" in the embodiments of this application are often used interchangeably, and the described technologies can be used in the above-mentioned systems and radio technologies, as well as 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 (6G) communication system. th Generation, 6G) communication system.

[0070] 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, vehicle user equipment can also be referred to as vehicle terminals, vehicle controllers, vehicle modules, vehicle components, vehicle chips, or vehicle units, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application.

[0071] The network-side device 12 may include an access network device or a core network device.

[0072] Among them, the access network device may 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 may include a base station, a Wireless Local Area Network (WLAN) Access Point (AP), or a Wireless Fidelity (WiFi) node, etc. Among them, the base station may 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 a specific technical term. 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.

[0073] Among them, the core network devices may include but are not limited to at least one of the following: core network nodes, core network functions, Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (L-NEF), Binding Support Function (BSF), Application Function (AF), Network Data Analytics Function (NWDAF), Location Management Function (LMF), etc. It should be noted that in the embodiments of this application, only the core network devices in the NR system are taken as examples for introduction, and the specific types of core network devices are not limited.

[0074] To facilitate a better understanding of the embodiments of this application, the Tracking reference signal (TRS) is described.

[0075] In the NR system, TRS is used for time-frequency tracking, i.e., for timing estimation, delay spread estimation, frequency offset estimation, and Doppler spread estimation. Timing estimation and frequency offset estimation can be used to complete the synchronization between the transmitter and the receiver. The results of delay spread estimation and Doppler spread estimation are important parameters for channel estimation, and can be used to assist the Demodulation Reference Signal (DMRS) of the Physical Downlink Control Channel (PDCCH) and the Physical Downlink Shared Channel (PDSCH) to complete more accurate channel estimation. TRS can be used for Radio Resource Control (RRC) connected state terminals (UEs), i.e., when the UE enters the RRC connected state, the time-frequency tracking performance is further adjusted based on the original Synchronization Signal Block (SSB). TRS can also be used for non-connected state UEs for time-frequency tracking.

[0076] TRS is a special set of Channel State Information Reference Signal (CSI-RS) resources. For TRS deployed on FR1 (low frequency), one or more TRS resource sets can be configured for a UE. Each TRS resource set contains 4 CSI-RS resources, and these 4 CSI-RS resources are located in two consecutive time slots, with 2 CSI-RS resources in each time slot; for TRS deployed on FR2 (high frequency), one or more TRS resource sets can also be configured for a UE. Among them, the CSI-RS resources included in a TRS resource set can exist in only one time slot, in which case there are only 2 CSI-RS resources; and a TRS resource set can also contain 4 CSI-RS resources, distributed in two consecutive time slots in pairs. NR supports periodic and aperiodic TRS. For periodic TRS, the optional values of the period are 2 μ · [10, 20, 40, 80] time slots (slots), where 2 μ is related to the subcarrier spacing. In the frequency domain, the bandwidth of TRS can be the Band Width Part (BWP) or min(52, BWP).

[0077] Assume that the TRS is deployed in FR1 with a period of 20 slots, an offset of 5 slots within the period, and the distribution of TRS symbols within a slot is l ∈ {4, 8}. The deployed BWP bandwidth is 20 MHz and the subcarrier spacing (SCS) is 15 KHz. Then the number of resource blocks (RBs) containing TRS in the frequency domain is 52. At this time, the time-frequency mapping of the TRS is as Figure 2 shown.

[0078] To facilitate a better understanding of the embodiments of the present application, quasi co-location (QCL) is described.

[0079] In the NR system, QCL means that the average delay, delay spread, Doppler frequency offset, Doppler spread, and spatial reception parameters of the channel experienced by the symbols on a certain antenna port can be inferred from another antenna port. Four different types of QCL relationships are designed in NR to cope with different transmission scenarios.

[0080] The specific QCL reference types (qcl-Type) are as follows:

[0081] 1) Type A: {Doppler frequency offset, Doppler spread, average delay, delay spread};

[0082] 2) Type B: {Doppler frequency offset, Doppler spread};

[0083] 3) Type C: {Doppler frequency offset, average delay};

[0084] 4) Type D: {Spatial reception parameters}.

[0085] Among them, before the RRC connected state, the reference source of QCL reference Type A for PDCCH and PDSCH transmissions is the SSB. When the terminal enters the RRC connected state, in order to obtain more refined time-frequency tracking performance, the network side can configure the TRS for time-frequency synchronization. At this time, the reference source of QCL reference Type A for PDCCH and PDSCH transmissions is the TRS.

[0086] The SSB described in the present application can be used interchangeably with the synchronization signal / physical broadcast signal block (SS / PBCH block), and can also be called any information block or resource block containing at least one of the synchronization signal, broadcast signal, broadcast channel, other system messages, and downlink broadcast channel.

[0087] To facilitate the understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and all of them fall within the protection scope of the embodiments of the present application. The embodiments of the present application include at least some of the following content.

[0088] Figure 3 is a schematic flowchart of a method 200 for transmitting a tracking reference signal according to an embodiment of the present application. As Figure 3 shown, the method 200 for transmitting the tracking reference signal may include at least some of the following content:

[0089] S210, the network side device transmits at least one TRS; wherein, the TRS satisfies at least one of the following: the TRS occupies at least one first time domain unit and at least one second time domain unit, and at least one of the first time domain units is included in the second time domain unit; the TRS corresponds to at least one first sequence, and the first sequence is used for multiplexing of the TRS; the TRS corresponds to at least one first frequency domain range; the TRS corresponds to at least one repetition;

[0090] S220, the terminal receives the at least one TRS;

[0091] S230, the terminal performs time-frequency tracking based on the at least one TRS.

[0092] It should be understood that Figure 3 shows the steps or operations of the method 200 for transmitting the tracking reference signal, but these steps or operations are only examples, and the present application may also perform other operations or Figure 3 variations of each operation in.

[0093] The TRS described in the embodiments of the present application may be composed of one or more first resources; when the TRS is composed of one first resource, the TRS is a resource block / burst; when the TRS is composed of multiple (including two) first resources, the TRS is a resource set. Optionally, the first resource may be a CSI-RS resource.

[0094] Exemplarily, the first time domain unit may be a symbol, and the second time domain unit may be a time slot.

[0095] When the TRS occupies multiple (including two) first time domain units: if the TRS is composed of one first resource, it can be understood that the first resource occupies multiple first time domain units; if the TRS is composed of multiple (including two) first resources, it can be understood that each first resource corresponds to one or more first time domain units, for example, one CSI-RS resource corresponds to one symbol.

[0096] When the TRS occupies multiple (including two) second time-domain units: If the TRS consists of one first resource, it can be understood that the first resource occupies multiple second time-domain units; if the TRS consists of multiple (including two) first resources, it can be understood that each second time-domain unit contains one or more first resources. For example, one time slot contains multiple CSI-RS resources.

[0097] In the embodiments of the present application, when the TRS occupies at least one first time-domain unit, it can be understood that the TRS occupies part or all of at least one first time-domain unit. Similarly, when the TRS occupies at least one second time-domain unit, it can be understood that the TRS occupies part or all of at least one second time-domain unit.

[0098] It should be noted that there are some limitations in the current TRS design, resulting in possible performance deficiencies and large overhead when it is used in scenarios with higher moving speeds (such as greater than or equal to 500 km / h), larger bandwidths, etc. For example, since the current TRS occupies at most 2 consecutive time slots, and two symbols are occupied within each time slot, its measurement performance for parameters such as Doppler spread needs to be further optimized. Another example is that the density of the current TRS in the frequency domain is fixed at 1 / 4, that is, 3 resource elements (REs) are occupied within each resource block (RB). For scenarios with large bandwidth and low latency, the overall overhead of the TRS will be large.

[0099] In the embodiments of the present application, the TRS satisfies at least one of the following: the TRS occupies at least one first time-domain unit and at least one second time-domain unit, the TRS corresponds to at least one first sequence, the TRS corresponds to at least one first frequency range, and the TRS corresponds to at least one repetition. Specifically, the embodiments of the present application design a more flexible TRS from at least one of the time domain, frequency domain, and code domain, which can improve the time-frequency tracking performance of the TRS and also reduce the resource overhead of the TRS.

[0100] Specifically, for example, the TRS occupies at least one first time-domain unit and at least one second time-domain unit, that is, a more flexible TRS is designed in the time domain, which can increase the time-domain span or the number of occupied time-domain resources of the TRS, thereby improving the time-frequency tracking performance of the TRS (such as the measurement performance for parameters such as Doppler spread), and also reducing the overall resource overhead of the TRS, and can be applied to scenarios with high moving speeds (such as greater than or equal to 500 km / h), low latency, and large bandwidth.

[0101] Specifically, for another example, the TRS corresponds to at least one first sequence. That is, a more flexible TRS is designed in the code domain, and the TRS can be transmitted by code division multiplexing (CDM), so as to reduce the overall resource overhead of the TRS in the network. For example, the TRSs of multiple users can be multiplexed on the same time-frequency resource by CDM, and it can be applied to scenarios such as high mobility speed (e.g., greater than or equal to 500 km / h), low latency, and large bandwidth.

[0102] Specifically, for example, the TRS corresponds to at least one first frequency domain range. That is, a more flexible TRS is designed in the frequency domain, which can increase the flexibility of the TRS distribution, thereby improving the time-frequency tracking performance of the TRS and also reducing the overall resource overhead of the TRS. It can be applied to scenarios such as high mobility speed (e.g., greater than or equal to 500 km / h), low latency, and large bandwidth.

[0103] Specifically, for example, the TRS corresponds to at least one repetition; for example, repeating in the time domain can increase the time domain span of the TRS, thereby improving the time-frequency tracking performance of the TRS (such as the measurement performance of parameters such as Doppler spread), and it can be applied to scenarios such as high mobility speed (e.g., greater than or equal to 500 km / h), low latency, and large bandwidth; for another example, repeating in the frequency domain can increase the frequency domain span of the TRS, thereby improving the time-frequency tracking performance of the TRS (such as the measurement performance of parameters such as delay spread), and it can be applied to scenarios such as high mobility speed (e.g., greater than or equal to 500 km / h), low latency, and large bandwidth.

[0104] In some embodiments, when the TRS occupies multiple (including two) first time domain units, all the first parameters of the TRS on the multiple first time domain units are the same or at least partially different;

[0105] Among them, the first parameter includes but is not limited to at least one of the following:

[0106] Frequency domain density;

[0107] Occupied frequency domain resource;

[0108] Time domain density;

[0109] Occupied time domain resource;

[0110] Transmission power.

[0111] In this embodiment, the first parameter of the TRS can be flexibly designed on multiple first time domain units.

[0112] In some embodiments, when the frequency domain density of the TRS on multiple first time domain units (such as symbols) is at least partially different, the frequency domain density of the TRS satisfies at least one of the following:

[0113] The frequency domain density corresponding after the first time domain position is lower than the frequency domain density corresponding before the first time domain position;

[0114] There is a multiple relationship between the frequency domain densities corresponding to at least some of the first time domain units (such as symbols);

[0115] There is a multiple relationship between the frequency domain densities corresponding to at least some of the second time domain units (such as time slots).

[0116] In this embodiment, that there is a multiple relationship between the frequency domain densities corresponding to at least some of the first time domain units (such as symbols) is beneficial to the joint measurement of TRS, or, that there is a multiple relationship between the frequency domain densities corresponding to at least some of the second time domain units (such as time slots) is beneficial to the joint measurement of TRS.

[0117] Exemplarily, the first time domain position may be a first time domain unit or a second time domain unit, or, the first time domain position may be a specific position on a first time domain unit or a second time domain unit.

[0118] Exemplarily, the frequency domain density of the TRS corresponding to the first time domain unit i is N1 times that of the TRS corresponding to the first time domain unit j, where N1 is a positive number. For example, the first time domain unit i is located before the first time domain unit j.

[0119] Exemplarily, the frequency domain density of the TRS corresponding to the second time domain unit i is N2 times that of the TRS corresponding to the second time domain unit j, where N2 is a positive number. For example, the first time domain unit i is located before the first time domain unit j.

[0120] Exemplarily, the frequency domain units occupied by the TRS on the second time domain unit i are a subset or part of the frequency domain units occupied by the TRS on the second time domain unit j. For example, the second time domain unit i is located before the second time domain unit j.

[0121] In some embodiments, in the case where the frequency domain resources occupied by the TRS on multiple first time domain units are at least partially different, the frequency domain resources occupied by the TRS satisfy at least one of the following:

[0122] The first frequency domain resources occupied by the TRS corresponding to at least some of the first time domain units are different;

[0123] The first frequency domain resources occupied by the TRS corresponding to at least some of the second time domain units are different.

[0124] This embodiment can reduce the overall overhead of TRS in the network while increasing the frequency domain span of TRS.

[0125] Exemplarily, the first frequency domain resource is RB or RE.

[0126] In some embodiments, when the time-domain density of the TRS is at least partially different on multiple first time-domain units, the time-domain density of the TRS satisfies at least one of the following:

[0127] The time-domain density corresponding after the second time-domain position is lower than the time-domain density corresponding before the second time-domain position;

[0128] There is a multiple relationship between the time-domain densities corresponding on at least some of the first time-domain units;

[0129] There is a multiple relationship between the time-domain densities corresponding on at least some of the second time-domain units.

[0130] This embodiment can reduce the overall overhead of the TRS in the network while increasing the time-domain span of the TRS.

[0131] In this embodiment, a multiple relationship between the time-domain densities corresponding on at least some of the first time-domain units (such as symbols) is beneficial to the joint measurement of the TRS, or a multiple relationship between the time-domain densities corresponding on at least some of the second time-domain units (such as time slots) is beneficial to the joint measurement of the TRS.

[0132] Exemplarily, the second time-domain position may be a first time-domain unit or a second time-domain unit, or the second time-domain position may be a specific position on a first time-domain unit or a second time-domain unit.

[0133] Exemplarily, the time-domain density of the TRS corresponding after the second time-domain unit i is N3 times the time-domain density of the TRS corresponding before the second time-domain unit i, where N3 is a positive number.

[0134] Exemplarily, the time-domain density of the TRS corresponding on the second time-domain unit i is N4 times the time-domain density of the TRS corresponding on the second time-domain unit j, where N4 is a positive number. For example, the first time-domain unit i is before the first time-domain unit j.

[0135] Exemplarily, the time-domain units occupied by the TRS on the second time-domain unit i are a subset or part of the time-domain units occupied by the TRS on the second time-domain unit j. For example, the second time-domain unit i is before the second time-domain unit j.

[0136] In some embodiments, when the time-domain resources occupied by the TRS are at least partially different on multiple (including two) first time-domain units, the time-domain resources occupied by the TRS satisfy at least one of the following:

[0137] On at least some of the second time-domain units, the first time-domain units occupied by the TRS are different;

[0138] On at least some of the second time domain units, the number of first time domain units occupied by the TRS is different;

[0139] On at least some of the second time domain units, the starting first time domain unit occupied by the TRS is different.

[0140] This embodiment can reduce the overall overhead of TRS in the network while increasing the time domain span of the TRS.

[0141] Exemplarily, the position of the first time domain unit (such as a symbol) occupied by the TRS on the second time domain unit i is different from the position of the first time domain unit (such as a symbol) occupied by the TRS on the second time domain unit j.

[0142] Exemplarily, the number of first time domain units (such as symbols) occupied by the TRS on the second time domain unit i is different from the number of first time domain units (such as symbols) occupied by the TRS on the second time domain unit j.

[0143] Exemplarily, the starting first time domain unit (such as a symbol) occupied by the TRS on the second time domain unit i is different from the starting first time domain unit (such as a symbol) occupied by the TRS on the second time domain unit j.

[0144] In some implementation manners, the starting first time domain unit can also be replaced by the offset of the first time domain unit.

[0145] In some embodiments, when the TRS occupies multiple (including two) second time domain units (such as time slots), at least some of the multiple second time domain units are discontinuous, or at least some of the multiple second time domain units are continuous.

[0146] Exemplarily, the TRS occupies X time slots, and the X time slots can be adjacent or non - adjacent. For example, the X time slots are all discontinuous, or at least some of the X time slots are continuous.

[0147] This embodiment can reduce the overall overhead of TRS in the network while increasing the time domain span of the TRS.

[0148] In some embodiments, the transmission method 200 of the tracking reference signal further includes:

[0149] The terminal determines the frequency domain density of the TRS based on a second parameter;

[0150] Wherein, the second parameter includes at least one of the following:

[0151] A first threshold, which is used to determine whether to adjust the frequency domain density;

[0152] A first indication parameter, which is used to determine the frequency domain density.

[0153] In this embodiment, in order to further reduce the TRS overhead, the frequency-domain density of the TRS can be reduced (for scenarios with large bandwidth or low latency). For example, the frequency-domain density of the TRS is adjusted based on a first threshold or a first indication parameter to achieve the purpose of reducing the frequency-domain density of the TRS.

[0154] Exemplarily, the first threshold can be configured or indicated by the network side, or the first threshold is agreed upon by the protocol.

[0155] Exemplarily, the network-side device or the terminal can determine whether to adjust the frequency-domain density according to the first threshold.

[0156] Exemplarily, the first indication parameter is a parameter for enabling a specific transmission mode (such as a transmission mode related to high-speed rail, or a transmission mode related to low latency, or a mode related to large bandwidth).

[0157] Exemplarily, there is a mapping relationship between the first indication parameter and the frequency-domain density. For example, a certain value / field of the first indication parameter corresponds to a specific frequency-domain density.

[0158] Exemplarily, the frequency-domain density of the TRS is 1 / Y, and the Y can be 6, 8, or 12.

[0159] For example, the frequency-domain density of the TRS is 1 / 6, that is, 2 REs are occupied in each RB, and the interval between every two REs is 6.

[0160] For example, the frequency-domain density of the TRS is 1 / 8, that is, 3 REs are occupied in every 2 RBs, and the interval between every two REs is 8.

[0161] For example, the frequency-domain density of the TRS is 1 / 12, that is, 1 RE is occupied in each RB, and the interval between every two REs is 12.

[0162] In some embodiments, the terminal can report to the network side to inform it of the frequency-domain density adjustment. At the same time, the terminal can perform at least one of the following: the terminal reports the latency; the terminal reports a latency correlation coefficient, which is used to characterize the level of latency; the terminal reports the target frequency-domain density.

[0163] In some embodiments, the transmission method 200 of the tracking reference signal further includes:

[0164] When the first result measured by the terminal based on the TRS does not meet the first threshold, the terminal sends a first message, which is used for the network-side device to determine the frequency-domain density of the TRS;

[0165] Among them, the first result includes but is not limited to at least one of the following: timing, delay spread, frequency offset, Doppler spread, Reference Signal Received Power (RSRP);

[0166] Among them, the first message includes but is not limited to at least one of the following: the first result, the quantization coefficient related to the first result, the target frequency domain density.

[0167] Correspondingly, the network-side device can determine the frequency domain density of the TRS based on the first message.

[0168] In some embodiments, the TRS corresponds to at least one first sequence, where the first sequence corresponds to one of the following:

[0169] A cyclic shift;

[0170] An Orthogonal cover code (OCC) sequence.

[0171] In this embodiment, in order to further reduce the overall overhead of the TRS in the network, multiple TRSs can be multiplexed through CDM.

[0172] Exemplarily, CDM multiplexing can be performed based on different cyclic shifts.

[0173] Exemplarily, CDM multiplexing can be performed based on different OCC sequences.

[0174] Optionally, the OCC sequence can be a walsh code or a Discrete Fourier Transform (DFT) code.

[0175] Exemplarily, when the TRS corresponds to multiple (including two) first sequences, it can be the case where the TRS has multiple ports. At this time, each port corresponds to a first sequence.

[0176] In some embodiments, in the case where the TRS corresponds to multiple (including two) first sequences, the multiple first sequences satisfy at least one of the following:

[0177] The multiple first sequences use the same base sequence;

[0178] The multiple first sequences respectively correspond to multiple ports of the TRS.

[0179] It should be noted that using the same base sequence is used to ensure the orthogonality of the multiple first sequences. At this time, it can be understood that the first sequence consists of two parts: the base sequence, and the cyclic shift or the OCC sequence.

[0180] In some embodiments, the OCC sequence is mapped to L third time-domain units in the TRS, or the OCC sequence is mapped to L first frequency-domain units in the TRS;

[0181] wherein, the length of the OCC sequence is L, and L is a positive integer.

[0182] Optionally, the third time-domain unit may be a symbol.

[0183] Optionally, the first frequency-domain unit may be a RE.

[0184] Exemplarily, the OCC sequence of length L corresponds to L REs in the frequency domain, or for example, the OCC sequence of length L corresponds to L symbols in the time domain.

[0185] In some embodiments, the base sequence adopted by the TRS is generated starting from a specific reference point. For example, the specific reference point is pointA. Optionally, the TRSs multiplexed by multiple CDMs may adopt the same base sequence.

[0186] In some embodiments, the TRS corresponds to at least one first frequency-domain range, and the first frequency-domain range includes M second frequency-domain units, where M is a positive integer; wherein, the second frequency-domain unit includes but is not limited to one of the following: RB, RB group, sub-band, Band Width Part (BWP), sub-BWP.

[0187] Optionally, different TRSs correspond to different first frequency-domain ranges, or different TRSs correspond to the same first frequency-domain range, or at least some TRSs correspond to different first frequency-domain ranges. It specifically depends on the decision of the network side and the guarantee of time-frequency tracking performance.

[0188] Exemplarily, in the case where the TRS corresponds to multiple first frequency-domain ranges, the different first frequency-domain ranges may be discontinuous or continuous. It specifically depends on the decision of the network side and the guarantee of time-frequency tracking performance.

[0189] Specifically, for example, assume that the TRS corresponds to 1 first frequency-domain range, the first frequency-domain range includes 3 second frequency-domain units, and the second frequency-domain unit is an RB. For example, TRS1 corresponds to RB0 to RB2, and TRS2 corresponds to RB5 to RB7.

[0190] Specifically, for example, assume that the TRS corresponds to 1 first frequency-domain range, the first frequency-domain range includes 3 second frequency-domain units, and the second frequency-domain unit is an RB group. For example, TRS1 corresponds to RB group 0 to RB group 2, and TRS2 corresponds to RB group 5 to RB group 7.

[0191] Specifically, for example, assume that the TRS corresponds to one first frequency domain range, and the first frequency domain range includes three second frequency domain units, where the second frequency domain unit is a BWP. For example, TRS1 corresponds to BWP0 to BWP2, and TRS2 corresponds to BWP5 to BWP7.

[0192] Specifically, for example, assume that the TRS corresponds to one first frequency domain range, and the first frequency domain range includes three second frequency domain units, where the second frequency domain unit is a sub-BWP. For example, TRS1 corresponds to sub-BWP 0 to sub-BWP 2, and TRS2 corresponds to sub-BWP 5 to sub-BWP 7.

[0193] Specifically, for example, assume that the TRS corresponds to one first frequency domain range, and the first frequency domain range includes three second frequency domain units, where the second frequency domain unit is a sub-band. For example, TRS1 corresponds to sub-Band 0 to sub-Band 2, and TRS2 corresponds to sub-Band 5 to sub-Band 7.

[0194] Specifically, for example, assume that TRS1 corresponds to two first frequency domain ranges, and the first frequency domain range includes three second frequency domain units, where the second frequency domain unit is an RB. For example, TRS1 corresponds to RB0 to RB2 and RB5 to RB7. Also, for example, TRS1 corresponds to RB0 to RB2 and RB3 to RB5.

[0195] Specifically, for example, assume that TRS1 corresponds to two first frequency domain ranges, and the first frequency domain range includes three second frequency domain units, where the second frequency domain unit is an RB group. For example, TRS1 corresponds to RB group 0 to RB group 2 and RB group 5 to RB group 7. Also, for example, TRS1 corresponds to RB group 0 to RB group 2 and RB group 3 to RB group 5.

[0196] Specifically, for example, assume that TRS1 corresponds to two first frequency domain ranges, and the first frequency domain range includes three second frequency domain units, where the second frequency domain unit is a BWP. For example, TRS1 corresponds to BWP0 to BWP2 and BWP5 to BWP7. Also, for example, TRS1 corresponds to BWP0 to BWP2 and BWP3 to BWP5.

[0197] Specifically, for example, assume that TRS1 corresponds to two first frequency domain ranges, and the first frequency domain range includes three second frequency domain units, where the second frequency domain unit is a sub-BWP. For example, TRS1 corresponds to sub-BWP 0 to sub-BWP 2 and sub-BWP 5 to sub-BWP 7. Also, for example, TRS1 corresponds to sub-BWP 0 to sub-BWP 2 and sub-BWP 3 to sub-BWP 5.

[0198] Specifically, for example, assume that TRS1 corresponds to two first frequency domain ranges, and the first frequency domain range includes three second frequency domain units, where the second frequency domain unit is a sub-band. For example, TRS1 corresponds to sub-bands 0 to 2 and sub-bands 5 to 7. Another example is that TRS1 corresponds to sub-bands 0 to 2 and sub-bands 3 to 5.

[0199] In some embodiments, when the terminal receives multiple (including two) TRSs and the terminal performs joint measurement based on the multiple TRSs, the multiple TRSs are respectively used as the QCL reference of other reference signals, or the multiple TRSs are jointly used as the QCL reference of other reference signals. It should be noted that the result of the joint measurement is used for time-frequency tracking.

[0200] Exemplarily, the terminal measures the same channel parameters through at least some of the multiple TRSs, where the channel parameters include at least one of the following: timing, delay spread, frequency offset, Doppler spread.

[0201] In some embodiments, when the TRS corresponds to multiple (including two) repetitions, at least one of the following is satisfied between the multiple repetitions:

[0202] There are K1 fourth time domain units between the multiple repetitions;

[0203] There are K2 fifth time domain units between the starting time domain positions of the multiple repetitions;

[0204] There are K3 third frequency domain units between the multiple repetitions;

[0205] There are K4 fourth frequency domain units between the starting frequency domain positions of the multiple repetitions;

[0206] Wherein, both K1 and K2 are integers, and K1≥0, K2≥1; both K3 and K4 are integers, and K3≥0, K4≥1.

[0207] In this embodiment, in order to enhance the time domain span of the TRS, time domain repetition can be performed on the TRS; or, in order to enhance the frequency domain span of the TRS, frequency domain repetition can be performed on the TRS.

[0208] Optionally, the fourth time domain unit is one of the following: symbol, time slot, sub-frame, frame, microsecond, millisecond, second, minute.

[0209] Optionally, the fifth time domain unit is one of the following: symbol, time slot, sub-frame, frame, microsecond, millisecond, second, minute.

[0210] Optionally, the third frequency domain unit is one of the following: RB, RE.

[0211] Optionally, the fourth frequency domain unit is one of the following: RB, RE.

[0212] In some embodiments, when the terminal receives multiple (including two) TRSs and the terminal performs joint measurement based on the multiple TRSs, at least some of the third parameters of the multiple TRSs are different, or at least some of the third parameters of the multiple TRSs are the same;

[0213] Wherein, the third parameter includes but is not limited to at least one of the following:

[0214] Frequency domain density;

[0215] Time domain density;

[0216] Occupied time domain resources;

[0217] Occupied frequency domain resources;

[0218] Transmission power;

[0219] Period type;

[0220] Period;

[0221] QCL reference.

[0222] Exemplarily, the third parameter can be configured or indicated by the network side, or, the third parameter can be reported by the terminal, or, the third parameter can be agreed upon by the protocol.

[0223] In some embodiments, in order to improve the time-frequency tracking performance of the TRS, multiple TRSs can be measured.

[0224] Wherein, at least one of the following of the multiple TRSs is the same or different:

[0225] The frequency domain density of the multiple (including two) TRSs, the time domain density of the multiple (including two) TRSs, the time domain span occupied by the multiple TRSs, the time domain position of the multiple (including two) TRSs, the transmission power of the multiple (including two) TRSs, the period of the multiple (including two) TRSs, the QCL reference relationship corresponding to the multiple (including two) TRSs.

[0226] Exemplarily, the frequency domain density of the TRS can be configured separately for each TRS.

[0227] Exemplarily, the time domain density of the TRS can be configured separately for each TRS.

[0228] Exemplarily, the time domain spans occupied by different TRSs are different. For example, TRS1 occupies 1 time slot, and TRS2 occupies 2 time slots.

[0229] Exemplarily, the time domain positions of multiple TRSs are the same or different. For example, the multiple TRSs may be located in the same or different time slots. For instance, TRS1 and TRS2 are both located in the same time slot, or in two identical time slots. For example, the multiple TRSs are located on the same or different symbols. For instance, TRS1 and TRS2 are located on the same symbol in the form of FDM or CDM.

[0230] Exemplarily, the transmission powers of multiple TRSs are the same or different. For example, the transmission power of TRS1 is high, and the transmission power of TRS2 is low.

[0231] Exemplarily, the cycle types of multiple TRSs are the same or different. For example, the first one is a periodic TRS, and the second one is an aperiodic TRS.

[0232] Exemplarily, the cycles of multiple TRSs are the same or different. For example, the first TRS has a period of 50 ms, and the second TRS has a period of 100 ms.

[0233] Exemplarily, the QCL reference relationships corresponding to multiple TRSs are the same or different. The QCL reference relationships include but are not limited to: beam, spatial filter, etc.

[0234] Therefore, in the embodiments of the present application, the TRS satisfies at least one of the following: the TRS occupies at least one first time domain unit and at least one second time domain unit, the TRS corresponds to at least one first sequence, the TRS corresponds to at least one first frequency domain range, and the TRS corresponds to at least one repetition. Specifically, starting from at least one of the time domain, frequency domain, and code domain, the present application designs a more flexible TRS, which can improve the time-frequency tracking performance of the TRS and also reduce the resource overhead of the TRS.

[0235] The technical solution of the present application is described below through Embodiment 1 to Embodiment 5.

[0236] Embodiment 1. To enhance the time domain span of the TRS, as Figure 4 shown, the TRS occupies 3 time slots and 100 RBs ( Figure 4 only a part of 2 RBs is shown in , and the other parts are similar). However, to further reduce the resource overhead of the TRS, the frequency domain density of the TRS on time slot #3 can be reduced.

[0237] Among them, as Figure 4As shown, the frequency-domain density of the TRS on time slot #3 is 1 / 2 of that on time slots #1 and #2. The frequency-domain density of both, or the relationship between the frequency-domain densities (such as a multiple relationship), can be configured by the network side (such as RRC parameters) or by default agreement in the protocol. In addition, the frequency-domain resources occupied by the TRS on time slot #3 are a subset of those on time slots #1 and #2, which is beneficial for the terminal to jointly measure the TRS resources on the same frequency-domain resources in multiple time slots.

[0238] Embodiment 2. To enhance the time-domain span of the TRS, as Figure 5 shown, the TRS occupies 3 time slots and 100 RBs ( Figure 5 only a part of 2 RBs is shown in the figure, and the other parts are similar). However, to further reduce the resource overhead of the TRS, the time-domain density of the TRS on some time slots can be reduced. For example, Figure 5 in the figure, the TRS on time slot #1 occupies 2 symbols, while the TRS on time slots #2 and #3 only occupies 1 symbol. The advantage of this is that while increasing the time span, the overall overhead of the TRS is reduced.

[0239] Among them, as Figure 5 shown, the time-domain density of the TRS on time slots #2 and #3 is 1 / 2 of that on time slot #1. The time-domain density of both, or the relationship between the time-domain densities (such as a multiple relationship), can be configured by the network side (such as RRC parameters) or by default agreement in the protocol. In addition, the time-domain resources occupied by the TRS on time slots #2 and #3 are a subset of those on time slot #1. Of course, the symbols occupied by the TRS on time slot #2 or time slot #3 (symbol #3) can also be different from those in time slot #1 (including different starting symbol positions). For example, through separate configuration by the network side or default agreement of the network side.

[0240] Embodiment 3. To enhance the time-domain span of the TRS, the TRS can also be repeated in the time domain. For example, assuming that one repetition of the TRS occupies two symbols within one time slot, then the TRS can be repeated in the time domain.

[0241] As Figure 6 shows an example of the TRS being repeated three times, and the three repetitions occupy three consecutive time slots. However, the time-domain positions occupied by multiple repetitions can also be discontinuous. For example, separated by A time slots, which can be configured by the network side (configured for all repetitions or configured separately for each repetition, such as in the form of a bitmap) or by default agreement in the protocol.

[0242] In addition, multiple repetitions can also occupy the same time slot, as Figure 7As shown in the figure. Assume that one repetition of the TRS occupies two symbols within one time slot, and the first repetition and the second repetition of the TRS are located within the same time slot. In this way, it is also possible to achieve the effect of expanding the time domain span and increasing the number of time domain symbols, which is beneficial to improving the time-frequency tracking performance.

[0243] In Embodiment 4, the time-frequency tracking performance can be enhanced by combining multiple TRS resources. For example, as Figure 8 shown, joint measurement is performed through 3 TRS resources. Among them, TRS1 occupies time slot #1 and occupies two symbols, with a 4-symbol interval between the symbols; TRS occupies time slot #2 and occupies two symbols, with a 7-symbol interval between the symbols; TRS3 occupies time slot #3 and occupies three symbols, with a 4-symbol interval between the symbols.

[0244] That is, when joint measurement is performed based on multiple TRS resources, the time-frequency resource occupancy of the multiple TRSs can be different. It can be configured by the network side (for example, each TRS is configured separately, or multiple TRSs are configured jointly), or it can be the default convention of the network side. By different time-frequency occupancies of the TRS resources, different time-frequency tracking effects can be achieved.

[0245] In Embodiment 5, for the large bandwidth scenario, time-frequency tracking can be performed by configuring different TRSs within different bandwidth ranges, as Figure 9 shown. For example, the entire large bandwidth is divided into L bandwidth ranges, and one TRS is configured in each bandwidth range. The configurations of the TRSs can be the same or different, depending on the decision of the network side and the guarantee of the time-frequency tracking performance.

[0246] At this time, the terminal can perform joint measurement of some parameters through multiple TRSs, such as timing and delay spread. Some parameters can be measured separately on each TRS, such as frequency offset and Doppler spread; the terminal can also measure only some parameters on some TRSs to reduce the complexity of the terminal. Based on this, the QCL reference for downlink transmission can be the multiple TRSs or some of the TRSs.

[0247] Therefore, through the TRS enhancement scheme, there are mainly two benefits. The first benefit is to improve the time-frequency tracking performance of the TRS, which can cope with scenarios such as higher mobile speeds, large bandwidths, and low latencies for future 6G systems. The second benefit is that a more flexible TRS is designed, which can effectively reduce the overall resource overhead of the TRS while ensuring the time-frequency tracking performance.

[0248] The transmission method of the tracking reference signal provided by the embodiment of the present application may be executed by a transmission device of the tracking reference signal, or a processing unit in the transmission device of the tracking reference signal for executing the transmission method of the tracking reference signal. In the embodiment of the present application, taking the transmission device of the tracking reference signal executing the transmission method of the tracking reference signal as an example, the transmission device of the tracking reference signal provided by the embodiment of the present application is described.

[0249] Figure 10 FIG. shows a schematic block diagram of a transmission device 300 of a tracking reference signal according to an embodiment of the present application. As Figure 10 shown, the transmission device 300 of the tracking reference signal includes:

[0250] A transceiver unit 310, configured to receive at least one tracking reference signal TRS;

[0251] A processing unit 320, configured to perform time-frequency tracking based on the at least one TRS;

[0252] Wherein, the TRS satisfies at least one of the following:

[0253] The TRS occupies at least one first time domain unit and at least one second time domain unit, and at least one of the first time domain units is included in the second time domain unit;

[0254] The TRS corresponds to at least one first sequence, and the first sequence is used for multiplexing of the TRS;

[0255] The TRS corresponds to at least one first frequency domain range;

[0256] The TRS corresponds to at least one repetition.

[0257] In some embodiments, when the TRS occupies multiple first time domain units, all or at least part of the first parameters of the TRS on the multiple first time domain units are the same;

[0258] Wherein, the first parameter includes at least one of the following:

[0259] Frequency domain density;

[0260] Occupied frequency domain resources;

[0261] Time domain density;

[0262] Occupied time domain resources;

[0263] Transmission power.

[0264] In some embodiments, when the TRS occupies multiple second time domain units, at least some of the multiple second time domain units are discontinuous, or at least some of the multiple second time domain units are continuous.

[0265] In some embodiments, when the frequency domain density of the TRS on the multiple first time domain units is at least partially different, the frequency domain density of the TRS satisfies at least one of the following:

[0266] The frequency domain density corresponding after the first time domain position is lower than the frequency domain density corresponding before the first time domain position;

[0267] There is a multiple relationship between the frequency domain densities corresponding to at least some of the first time domain units;

[0268] There is a multiple relationship between the frequency domain densities corresponding to at least some of the second time domain units.

[0269] In some embodiments, when the frequency domain resources occupied by the TRS on the multiple first time domain units are at least partially different, the frequency domain resources occupied by the TRS satisfy at least one of the following:

[0270] The first frequency domain resources occupied by the TRS corresponding to at least some of the first time domain units are different;

[0271] The first frequency domain resources occupied by the TRS corresponding to at least some of the second time domain units are different.

[0272] In some embodiments, when the time domain density of the TRS on the multiple first time domain units is at least partially different, the time domain density of the TRS satisfies at least one of the following:

[0273] The time domain density corresponding after the second time domain position is lower than the time domain density corresponding before the second time domain position;

[0274] There is a multiple relationship between the time domain densities corresponding to at least some of the first time domain units;

[0275] There is a multiple relationship between the time domain densities corresponding to at least some of the second time domain units.

[0276] In some embodiments, when the time domain resources occupied by the TRS on the multiple first time domain units are at least partially different, the time domain resources occupied by the TRS satisfy at least one of the following:

[0277] On at least some of the second time domain units, the first time domain units occupied by the TRS are different;

[0278] On at least part of the second time domain units, the number of the first time domain units occupied by the TRS is different;

[0279] On at least part of the second time domain units, the starting first time domain unit occupied by the TRS is different.

[0280] In some embodiments, the processing unit 320 is further configured to determine the frequency domain density of the TRS based on a second parameter;

[0281] Wherein, the second parameter includes at least one of the following:

[0282] A first threshold, the first threshold being used to determine whether to adjust the frequency domain density;

[0283] A first indication parameter, the first indication parameter being used to determine the frequency domain density.

[0284] In some embodiments, when the first result measured by the tracking reference signal transmission device 300 based on the TRS does not meet the first threshold, the transceiver unit 310 is further configured to send a first message, the first message being used for a network side device to determine the frequency domain density;

[0285] Wherein, the first result includes at least one of the following: timing, delay spread, frequency offset, Doppler spread, reference signal received power RSRP;

[0286] Wherein, the first message includes at least one of the following: the first result, a quantization coefficient related to the first result, a target frequency domain density.

[0287] In some embodiments, the TRS corresponds to at least one first sequence, wherein the first sequence corresponds to one of the following:

[0288] One cyclic shift;

[0289] One orthogonal cover code OCC sequence.

[0290] In some embodiments, when the TRS corresponds to multiple first sequences, the multiple first sequences satisfy at least one of the following:

[0291] The multiple first sequences use the same base sequence;

[0292] The multiple first sequences respectively correspond to multiple ports of the TRS.

[0293] In some embodiments, the OCC sequence is mapped to L third time domain units in the TRS, or the OCC sequence is mapped to L first frequency domain units in the TRS;

[0294] Among them, the length of the OCC sequence is L, and L is a positive integer.

[0295] In some embodiments, the base sequence adopted by the TRS is generated starting from a specific reference point.

[0296] In some embodiments, the TRS corresponds to at least one first frequency domain range, and the first frequency domain range includes M second frequency domain units, where M is a positive integer; among them, the second frequency domain unit includes one of the following: RB, RB group, sub-band, bandwidth part BWP, sub-BWP.

[0297] In some embodiments, different TRSs correspond to different first frequency domain ranges, or different TRSs correspond to the same first frequency domain range, or at least some of the TRSs correspond to different first frequency domain ranges.

[0298] In some embodiments, when the transmission device 300 of the tracking reference signal receives multiple TRSs, and the transmission device 300 of the tracking reference signal performs joint measurement based on the multiple TRSs, the multiple TRSs are respectively used as the quasi-co-location QCL reference of other reference signals, or the multiple TRSs are jointly used as the QCL reference of other reference signals.

[0299] In some embodiments, when the TRS corresponds to multiple repetitions, at least one of the following is satisfied between the multiple repetitions:

[0300] There are K1 fourth time domain units between the multiple repetitions;

[0301] There are K2 fifth time domain units between the starting time domain positions of the multiple repetitions;

[0302] There are K3 third frequency domain units between the multiple repetitions;

[0303] There are K4 fourth frequency domain units between the starting frequency domain positions of the multiple repetitions;

[0304] Among them, both K1 and K2 are integers, and K1≥0, K2≥1; both K3 and K4 are integers, and K3≥0, K4≥1.

[0305] In some embodiments, when the transmission device 300 of the tracking reference signal receives multiple TRSs, and the transmission device 300 of the tracking reference signal performs joint measurement based on the multiple TRSs, at least some of the third parameters of the multiple TRSs are different, or at least some of the third parameters of the multiple TRSs are the same;

[0306] Among them, the third parameter includes at least one of the following:

[0307] Frequency domain density;

[0308] Time domain density;

[0309] Occupied time domain resources;

[0310] Occupied frequency domain resources;

[0311] Transmission power;

[0312] Period type;

[0313] Period;

[0314] QCL reference.

[0315] In some embodiments, the above transceiver unit 310 may be a communication interface or transceiver, or an input / output interface of a communication chip or system-on-chip. The processing unit 320 may be embedded in or independent of the processor of the terminal in hardware form.

[0316] It should be understood that the transmission device 300 of the tracking reference signal according to the embodiments of the present application may correspond to the terminal in the method embodiments of the present application, and each unit in the transmission device 300 of the tracking reference signal is respectively for implementing Figure 3 The corresponding processes of the terminal in the method 200 shown. For the sake of brevity, they will not be described herein again.

[0317] Therefore, in the embodiments of the present application, the TRS satisfies at least one of the following: the TRS occupies at least one first time domain unit and at least one second time domain unit, the TRS corresponds to at least one first sequence, the TRS corresponds to at least one first frequency domain range, and the TRS corresponds to at least one repetition. Specifically, the embodiments of the present application design a more flexible TRS from at least one of the time domain, frequency domain, and code domain aspects, which can improve the time-frequency tracking performance of the TRS and also reduce the resource overhead of the TRS.

[0318] Figure 11 Fig. shows a schematic block diagram of a transmission device 400 of a tracking reference signal according to an embodiment of the present application. As Figure 11 shown, the transmission device 400 of the tracking reference signal includes:

[0319] A transceiver unit 410, configured to send at least one tracking reference signal TRS;

[0320] Wherein, the TRS satisfies at least one of the following:

[0321] The TRS occupies at least one first time domain unit and at least one second time domain unit, and at least one of the first time domain units is included in the second time domain unit;

[0322] The TRS corresponds to at least one first sequence for multiplexing of the TRS;

[0323] The TRS corresponds to at least one first frequency domain range;

[0324] The TRS corresponds to at least one repetition.

[0325] In some embodiments, when the TRS occupies a plurality of first time domain units, first parameters of the TRS on the plurality of first time domain units are all the same or at least partially different;

[0326] Wherein, the first parameter includes at least one of the following:

[0327] Frequency domain density;

[0328] Occupied frequency domain resources;

[0329] Time domain density;

[0330] Occupied time domain resources;

[0331] Transmission power.

[0332] In some embodiments, when the TRS occupies a plurality of second time domain units, at least some of the plurality of second time domain units are discontinuous, or at least some of the plurality of second time domain units are continuous.

[0333] In some embodiments, when the frequency domain density of the TRS on the plurality of first time domain units is at least partially different, the frequency domain density of the TRS satisfies at least one of the following:

[0334] The frequency domain density corresponding after the first time domain position is lower than the frequency domain density corresponding before the first time domain position;

[0335] There is a multiple relationship between the frequency domain densities corresponding to at least some of the first time domain units;

[0336] There is a multiple relationship between the frequency domain densities corresponding to at least some of the second time domain units.

[0337] In some embodiments, when the frequency domain resources occupied by the TRS on the plurality of first time domain units are at least partially different, the frequency domain resources occupied by the TRS satisfy at least one of the following:

[0338] The first frequency domain resources occupied by the TRS corresponding to at least some of the first time domain units are different;

[0339] The first frequency domain resources occupied by the TRS corresponding to at least some of the second time domain units are different.

[0340] In some embodiments, when the time domain density of the TRS on the plurality of first time domain units is at least partially different, the time domain density of the TRS satisfies at least one of the following:

[0341] The time domain density corresponding after the second time domain position is lower than the time domain density corresponding before the second time domain position;

[0342] There is a multiple relationship between the time domain densities corresponding to at least some of the first time domain units;

[0343] There is a multiple relationship between the time domain densities corresponding to at least some of the second time domain units.

[0344] In some embodiments, when the time domain resources occupied by the TRS on the plurality of first time domain units are at least partially different, the time domain resources occupied by the TRS satisfy at least one of the following:

[0345] On at least some of the second time domain units, the first time domain units occupied by the TRS are different;

[0346] On at least some of the second time domain units, the number of first time domain units occupied by the TRS is different;

[0347] On at least some of the second time domain units, the starting first time domain units occupied by the TRS are different.

[0348] In some embodiments, the transceiver unit 410 is further configured to receive a first message, where the first message is used to determine the frequency domain density of the TRS.

[0349] In some embodiments, when the TRS corresponds to at least one first sequence, the first sequence corresponds to one of the following:

[0350] One cyclic shift;

[0351] One orthogonal cover code (OCC) sequence.

[0352] In some embodiments, when the TRS corresponds to a plurality of first sequences, the plurality of first sequences satisfy at least one of the following:

[0353] The plurality of first sequences use the same base sequence;

[0354] The plurality of first sequences respectively correspond to a plurality of ports of the TRS.

[0355] In some embodiments, the OCC sequence is mapped to L third time-domain units in the TRS, or the OCC sequence is mapped to L first frequency-domain units in the TRS;

[0356] wherein, the length of the OCC sequence is L, and L is a positive integer.

[0357] In some embodiments, the base sequence adopted by the TRS is generated starting from a specific reference point.

[0358] In some embodiments, when the TRS corresponds to at least one first frequency-domain range, the first frequency-domain range includes M second frequency-domain units, and M is a positive integer;

[0359] wherein, the second frequency-domain unit includes one of the following: RB, RB group, sub-band, bandwidth part BWP, sub-BWP.

[0360] In some embodiments, different TRSs correspond to different first frequency-domain ranges, or different TRSs correspond to the same first frequency-domain range, or at least some of the TRSs correspond to different first frequency-domain ranges.

[0361] In some embodiments, when the network-side device sends multiple TRSs and the multiple TRSs are used for joint measurement, the multiple TRSs are respectively used as the quasi-co-location QCL reference of other reference signals, or the multiple TRSs are jointly used as the QCL reference of other reference signals.

[0362] In some embodiments, when the TRS corresponds to multiple repetitions, at least one of the following is satisfied between the multiple repetitions:

[0363] There are K1 fourth time-domain units between the multiple repetitions;

[0364] There are K2 fifth time-domain units between the starting time-domain positions of the multiple repetitions;

[0365] There are K3 third frequency-domain units between the multiple repetitions;

[0366] There are K4 fourth frequency-domain units between the starting frequency-domain positions of the multiple repetitions;

[0367] wherein, both K1 and K2 are integers, and K1≥0, K2≥1; both K3 and K4 are integers, and K3≥0, K4≥1.

[0368] In some embodiments, when the network-side device transmits multiple TRSs and the multiple TRSs are used for joint measurement, the third parameters of at least some of the multiple TRSs are different, or the third parameters of at least some of the multiple TRSs are the same;

[0369] Wherein, the third parameter includes at least one of the following:

[0370] Frequency-domain density;

[0371] Time-domain density;

[0372] Occupied time-domain resource;

[0373] Occupied frequency-domain resource;

[0374] Transmission power;

[0375] Period type;

[0376] Period;

[0377] QCL reference.

[0378] In some embodiments, the above transceiver unit 410 may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system-on-chip.

[0379] It should be understood that the transmission device 400 of the tracking reference signal according to the embodiments of the present application may correspond to the network-side device in the method embodiments of the present application, and each unit in the transmission device 400 of the tracking reference signal respectively implements Figure 3 the corresponding processes of the network-side device in the method 200 shown. For the sake of brevity, details are not described herein again.

[0380] Therefore, in the embodiments of the present application, the TRS satisfies at least one of the following: the TRS occupies at least one first time-domain unit and at least one second time-domain unit, the TRS corresponds to at least one first sequence, the TRS corresponds to at least one first frequency-domain range, and the TRS corresponds to at least one repetition. Specifically, the embodiments of the present application design a more flexible TRS from at least one of the time domain, frequency domain, and code domain, which can improve the time-frequency tracking performance of the TRS and also reduce the resource overhead of the TRS.

[0381] The transmission device of the tracking reference signal 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. The electronic device may be a terminal or a network-side device, or other devices other than terminals or network-side devices. Exemplarily, the terminal may include, but is not limited to, the types of the above-listed terminal 11, the network-side device may include, but is not limited to, the types of the above-listed network-side device 12, and other devices may be servers, Network Attached Storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0382] The transmission device of the tracking reference signal provided by the embodiments of the present application can implement Figure 3 each process implemented by the method embodiments and achieve the same technical effects. To avoid repetition, they will not be elaborated here.

[0383] As Figure 12 shown, the embodiments of the present application further provide a communication device 500, including a processor 501 and a memory 502, and a program or instruction that can run on the processor 501 is stored on the memory 502.

[0384] For example, when the communication device 500 is a terminal, when the program or instruction is executed by the processor 501, it implements each step executed by the terminal in the above method embodiments of the transmission method of the tracking reference signal, and can achieve the same technical effects. To avoid repetition, they will not be elaborated here.

[0385] Again, for example, when the communication device 500 is a network-side device, when the program or instruction is executed by the processor 501, it implements each step executed by the network-side device in the above method embodiments of the transmission method of the tracking reference signal, and can achieve the same technical effects. To avoid repetition, they will not be elaborated here.

[0386] The embodiments of the present application further provide 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 as Figure 3 shown in the steps executed by the terminal in the method embodiments. This terminal embodiment corresponds to the above terminal-side method embodiments, and 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. Specifically, Figure 13 is a schematic diagram of the hardware structure of a terminal for implementing the embodiments of the present application.

[0387] The terminal 600 includes, but is not limited to, at least some components such as a radio frequency unit 601, a network module 602, an audio output unit 603, an input unit 604, a sensor 605, a display unit 606, a user input unit 607, an interface unit 608, a memory 609, and a processor 610.

[0388] Those skilled in the art can understand that the terminal 600 may further include a power source (such as a battery) for supplying power to each component. The power source can be logically connected to the processor 610 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 13 The terminal structure shown does not limit 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.

[0389] It should be understood that in the embodiments of the present application, the input unit 604 may include a graphics processing unit (GPU) 6041 and a microphone 6042. The graphics processor 6041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 606 may include a display panel 6061, and the display panel 6061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 607 includes at least one of a touch panel 6071 and other input devices 6072. The touch panel 6071 is also called a touch screen. The touch panel 6071 may include two parts: a touch detection device and a touch controller. The other input devices 6072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be elaborated here.

[0390] In the embodiments of the present application, after the radio frequency unit 601 receives downlink data from a network-side device, it can be transmitted to the processor 610 for processing; in addition, the radio frequency unit 601 can send uplink data to the network-side device. Generally, the radio frequency unit 601 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0391] The memory 609 can be used to store software programs or instructions as well as various data. The memory 609 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 609 may include volatile memory or 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 609 in the embodiments of the present application includes but is not limited to these and any other suitable types of memory.

[0392] The processor 610 may include at least one processing unit; optionally, the processor 610 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 610 either.

[0393] Among them, the radio frequency unit 601 is used to receive at least one TRS;

[0394] Among them, the processor 610 is used to perform time-frequency tracking based on the at least one TRS;

[0395] Among them, the TRS satisfies at least one of the following:

[0396] The TRS occupies at least one first time-domain unit and at least one second time-domain unit, and at least one of the first time-domain units is included in the second time-domain unit;

[0397] The TRS corresponds to at least one first sequence, and the first sequence is used for multiplexing of the TRS;

[0398] The TRS corresponds to at least one first frequency-domain range;

[0399] The TRS corresponds to at least one repetition.

[0400] It can be understood that the implementation processes of the various implementation manners mentioned in this embodiment may refer to the relevant descriptions of the method embodiment and achieve the same or corresponding technical effects. To avoid repetition, they will not be elaborated here.

[0401] This application embodiment also provides a network-side device, including a processor and a communication interface. The communication interface is coupled to the processor, and the processor is configured to run a program or instruction to implement the steps performed by the network-side device in the method embodiment as Figure 3 shown. This network-side device embodiment corresponds to the above network-side device method embodiment. Each implementation process and implementation manner of the above method embodiment can be applied to this network-side device embodiment and can achieve the same technical effect. For the sake of brevity, they will not be elaborated here.

[0402] Specifically, this application embodiment also provides a network-side device. As Figure 14 shown, the network-side device 700 includes: an antenna 71, a radio frequency device 72, a baseband device 73, a processor 74, and a memory 75. The antenna 71 is connected to the radio frequency device 72. In the uplink direction, the radio frequency device 72 receives information through the antenna 71 and sends the received information to the baseband device 73 for processing. In the downlink direction, the baseband device 73 processes the information to be sent and sends it to the radio frequency device 72. The radio frequency device 72 processes the received information and then sends it out through the antenna 71.

[0403] The method performed by the network-side device in the above embodiments can be implemented in the baseband device 73, and the baseband device 73 includes a baseband processor.

[0404] The baseband device 73 may include, for example, at least one baseband board, and at least two chips are provided on the baseband board. As Figure 14 shown, one of the chips is, for example, a baseband processor, which is connected to the memory 75 through a bus interface to call a program in the memory 75 and execute the network device operations shown in the above method embodiment.

[0405] The network-side device may further include a network interface 76, which is, for example, a Common Public Radio Interface (CPRI).

[0406] Specifically, the network-side device 700 in the embodiments of the present application further includes: instructions or programs stored on the memory 75 and executable on the processor 74. The processor 74 calls the instructions or programs in the memory 75 to execute Figure 11 the methods executed by the units shown, and achieve the same technical effects. To avoid repetition, they are not described herein again.

[0407] The embodiments of the present application further provide a readable storage medium, on which programs or instructions are stored. When the programs or instructions are executed by a processor, they implement each process of the above-mentioned embodiment of the method for transmitting a tracking reference signal, and can achieve the same technical effects. To avoid repetition, they are not described herein again.

[0408] Wherein, 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.

[0409] The embodiments of the present application further provide a chip, which 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 each process of the above-mentioned embodiment of the method for transmitting a tracking reference signal, and can achieve the same technical effects. To avoid repetition, they are not described herein again.

[0410] 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.

[0411] The embodiments of the present application further provide a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement each process of the above-mentioned embodiment of the method for transmitting a tracking reference signal, and can achieve the same technical effects. To avoid repetition, they are not described herein again.

[0412] The embodiments of the present application further provide a communication system, including: a terminal and a network-side device. Wherein, the terminal can be used to execute the steps executed by the terminal in the above-mentioned method for transmitting a tracking reference signal, and the network-side device can be used to execute the steps executed by the network-side device in the above-mentioned method for transmitting a tracking reference signal.

[0413] 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 expressly listed, or also includes elements inherent to such a 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 that 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, but 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, the features described with reference to certain examples may be combined in other examples.

[0414] From the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments 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 the various embodiments of the present application.

[0415] 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. These embodiments are all within the protection scope of the present application.

Claims

1. A method for transmitting a tracking reference signal, characterized in that Comprising: The terminal receives at least one Tracking Reference Signal (TRS); The terminal performs time-frequency tracking based on the at least one TRS; Wherein, the TRS satisfies at least one of the following: The TRS occupies at least one first time-domain unit and at least one second time-domain unit, and at least one of the first time-domain units is included in the second time-domain unit; The TRS corresponds to at least one first sequence, and the first sequence is used for multiplexing of the TRS; The TRS corresponds to at least one first frequency-domain range; The TRS corresponds to at least one repetition.

2. The method according to claim 1, wherein When the TRS occupies multiple first time-domain units, all or at least part of the first parameters of the TRS on the multiple first time-domain units are the same or different; Wherein, the first parameter includes at least one of the following: Frequency-domain density; Occupied frequency-domain resources; Time-domain density; Occupied time-domain resources; Transmission power.

3. The method according to claim 1, wherein When the TRS occupies multiple second time-domain units, at least part of the second time-domain units among the multiple second time-domain units are discontinuous, or at least part of the second time-domain units among the multiple second time-domain units are continuous.

4. The method according to claim 2, wherein When the frequency-domain density of the TRS on the multiple first time-domain units is at least partially different, the frequency-domain density of the TRS satisfies at least one of the following: The frequency-domain density corresponding after the first time-domain position is lower than the frequency-domain density corresponding before the first time-domain position; There is a multiple relationship between the frequency-domain densities corresponding to at least part of the first time-domain units; There is a multiple relationship between the frequency-domain densities corresponding to at least part of the second time-domain units.

5. The method according to claim 2, wherein When the occupied frequency-domain resources of the TRS on the multiple first time-domain units are at least partially different, the occupied frequency-domain resources of the TRS satisfy at least one of the following: The first frequency-domain resources occupied by the TRS corresponding to at least part of the first time-domain units are different; The first frequency-domain resources occupied by the TRS corresponding to at least part of the second time-domain units are different.

6. The method according to claim 2, wherein When the time-domain density of the TRS on the multiple first time-domain units is at least partially different, the time-domain density of the TRS satisfies at least one of the following: The time-domain density corresponding after the second time-domain position is lower than the time-domain density corresponding before the second time-domain position; There is a multiple relationship between the time-domain densities corresponding to at least part of the first time-domain units; There is a multiple relationship between the time-domain densities corresponding to at least part of the second time-domain units.

7. The method according to claim 2, wherein When the occupied time-domain resources of the TRS on the multiple first time-domain units are at least partially different, the occupied time-domain resources of the TRS satisfy at least one of the following: On at least part of the second time domain units, the first time domain units occupied by the TRS are different; On at least part of the second time domain units, the number of the first time domain units occupied by the TRS is different; On at least part of the second time domain units, the starting first time domain units occupied by the TRS are different.

8. The method according to claim 1, wherein The method further includes: The terminal determines the frequency domain density of the TRS based on a second parameter; Wherein, the second parameter includes at least one of the following: A first threshold, which is used to determine whether to adjust the frequency domain density; A first indication parameter, which is used to determine the frequency domain density.

9. The method according to claim 8, wherein The method further includes: When the first result measured by the terminal based on the TRS does not meet the first threshold, the terminal sends a first message, and the first message is used for the network side device to determine the frequency domain density; Wherein, the first result includes at least one of the following: timing, delay spread, frequency offset, Doppler spread, reference signal received power RSRP; Wherein, the first message includes at least one of the following: the first result, the quantization coefficient related to the first result, the target frequency domain density.

10. The method according to claim 1, wherein The TRS corresponds to at least one first sequence, wherein the first sequence corresponds to one of the following: One cyclic shift; One orthogonal cover code (OCC) sequence.

11. The method according to claim 10, wherein When the TRS corresponds to multiple first sequences, the multiple first sequences satisfy at least one of the following: The multiple first sequences adopt the same base sequence; The multiple first sequences respectively correspond to multiple ports of the TRS.

12. The method according to claim 10, wherein The OCC sequence is mapped to L third time domain units in the TRS, or the OCC sequence is mapped to L first frequency domain units in the TRS; Wherein, the length of the OCC sequence is L, and L is a positive integer.

13. The method according to claim 10, wherein The base sequence adopted by the TRS is generated starting from a specific reference point.

14. The method according to claim 1, wherein The TRS corresponds to at least one first frequency domain range, and the first frequency domain range includes M second frequency domain units, and M is a positive integer; wherein, the second frequency domain unit includes one of the following: resource block (RB), RB group, sub-band, bandwidth part (BWP), sub-BWP.

15. The method according to claim 14, wherein Different TRSs correspond to different first frequency domain ranges, or different TRSs correspond to the same first frequency domain range, or at least part of the TRSs correspond to different first frequency domain ranges.

16. The method according to claim 14 or 15, wherein When the terminal receives multiple TRSs and the terminal performs joint measurement based on the multiple TRSs, each of the multiple TRSs serves as a quasi co-location (QCL) reference for other reference signals, or the multiple TRSs jointly serve as a QCL reference for other reference signals.

17. The method according to claim 1, wherein: When the TRS corresponds to multiple repetitions, at least one of the following is satisfied between the multiple repetitions: There are K1 fourth time domain units between the multiple repetitions; There are K2 fifth time domain units between the starting time domain positions of the multiple repetitions; There are K3 third frequency domain units between the multiple repetitions; There are K4 fourth frequency domain units between the starting frequency domain positions of the multiple repetitions; wherein, both K1 and K2 are integers, and K1≥0, K2≥1; both K3 and K4 are integers, and K3≥0, K4≥1.

18. The method according to any one of claims 1 to 17, wherein: When the terminal receives multiple TRSs and the terminal performs joint measurement based on the multiple TRSs, at least some of the third parameters of the multiple TRSs are different, or at least some of the third parameters of the multiple TRSs are the same; wherein, the third parameter includes at least one of the following: Frequency domain density; Time domain density; Occupied time domain resources; Occupied frequency domain resources; Transmission power; Period type; Period; QCL reference.

19. A method for transmitting a tracking reference signal, characterized in that, Including: The network side device sends at least one tracking reference signal (TRS); wherein, the TRS satisfies at least one of the following: The TRS occupies at least one first time domain unit and at least one second time domain unit, and at least one of the first time domain units is included in the second time domain unit; The TRS corresponds to at least one first sequence for multiplexing the TRS; The TRS corresponds to at least one first frequency domain range; The TRS corresponds to at least one repetition.

20. The method according to claim 19, wherein: When the TRS occupies multiple first time domain units, all or at least some of the first parameters of the TRS on the multiple first time domain units are the same or different; wherein, the first parameter includes at least one of the following: Frequency domain density; Occupied frequency domain resources; Time domain density; Occupied time domain resources; Transmission power.

21. The method according to claim 19, wherein: When the TRS occupies multiple second time domain units, at least some of the multiple second time domain units are discontinuous, or at least some of the multiple second time domain units are continuous.

22. The method according to claim 20, wherein: When at least some of the frequency domain densities of the TRS on the multiple first time domain units are different, the frequency domain density of the TRS satisfies at least one of the following: The frequency domain density corresponding after the first time domain position is lower than the frequency domain density corresponding before the first time domain position; There is a multiple relationship between at least some of the frequency domain densities corresponding to the first time domain units; There is a multiple relationship between the corresponding frequency domain densities on at least part of the second time domain units.

23. The method according to claim 20, wherein when the frequency domain resources occupied by the TRS on the multiple first time domain units are at least partially different, the frequency domain resources occupied by the TRS satisfy at least one of the following: the first frequency domain resources occupied by the TRS corresponding to at least part of the first time domain units are different; the first frequency domain resources occupied by the TRS corresponding to at least part of the second time domain units are different.

24. The method according to claim 20, wherein when the time domain densities of the TRS on the multiple first time domain units are at least partially different, the time domain density of the TRS satisfies at least one of the following: the time domain density corresponding after the second time domain position is lower than the time domain density corresponding before the second time domain position; there is a multiple relationship between the corresponding time domain densities on at least part of the first time domain units; there is a multiple relationship between the corresponding time domain densities on at least part of the second time domain units.

25. The method according to claim 20, wherein when the time domain resources occupied by the TRS on the multiple first time domain units are at least partially different, the time domain resources occupied by the TRS satisfy at least one of the following: on at least part of the second time domain units, the first time domain units occupied by the TRS are different; on at least part of the second time domain units, the number of the first time domain units occupied by the TRS is different; on at least part of the second time domain units, the starting first time domain units occupied by the TRS are different.

26. The method according to claim 19, wherein The method further includes: the network side device receives a first message, wherein the first message is used to determine the frequency domain density of the TRS.

27. The method according to claim 19, wherein when the TRS corresponds to at least one first sequence, the first sequence corresponds to one of the following: a cyclic shift; an orthogonal cover code OCC sequence.

28. The method according to claim 27, wherein when the TRS corresponds to multiple first sequences, the multiple first sequences satisfy at least one of the following: the multiple first sequences use the same base sequence; the multiple first sequences respectively correspond to multiple ports of the TRS.

29. The method according to claim 27, wherein the OCC sequence is mapped to L third time domain units in the TRS, or the OCC sequence is mapped to L first frequency domain units in the TRS; wherein the length of the OCC sequence is L, and L is a positive integer.

30. The method according to claim 27, wherein the base sequence adopted by the TRS is generated starting from a specific reference point.

31. The method according to claim 19, wherein when the TRS corresponds to at least one first frequency domain range, the first frequency domain range includes M second frequency domain units, and M is a positive integer; Wherein, the second frequency domain unit includes one of the following: resource block (RB), RB group, sub-band, bandwidth part (BWP), sub-BWP.

32. The method according to claim 31, characterized in that different ones of the TRSs correspond to different ones of the first frequency domain ranges, or different ones of the TRSs correspond to the same first frequency domain range, or at least some of the TRSs correspond to different ones of the first frequency domain ranges.

33. The method according to claim 31 or 32, characterized in that when the network side device sends a plurality of TRSs and the plurality of TRSs are used for joint measurement, the plurality of TRSs are respectively used as the quasi co-location (QCL) reference of other reference signals, or the plurality of TRSs jointly serve as the QCL reference of other reference signals.

34. The method according to claim 19, characterized in that when the TRS corresponds to multiple repetitions, at least one of the following is satisfied between the multiple repetitions: there are K1 fourth time domain units between the multiple repetitions; there are K2 fifth time domain units between the starting time domain positions of the multiple repetitions; there are K3 third frequency domain units between the multiple repetitions; there are K4 fourth frequency domain units between the starting frequency domain positions of the multiple repetitions; wherein, both K1 and K2 are integers, and K1≥0, K2≥1; both K3 and K4 are integers, and K3≥0, K4≥1.

35. The method according to any one of claims 19 to 34, characterized in that when the network side device sends a plurality of TRSs and the plurality of TRSs are used for joint measurement, at least some of the third parameters of the plurality of TRSs are different, or at least some of the third parameters of the plurality of TRSs are the same; wherein, the third parameter includes at least one of the following: frequency domain density; time domain density; occupied time domain resource; occupied frequency domain resource; transmission power; period type; period; QCL reference.

36. A transmission device for tracking a reference signal, characterized in that, including: a transceiver unit, configured to receive at least one tracking reference signal (TRS); a processing unit, configured to perform time-frequency tracking based on the at least one TRS; wherein, the TRS satisfies at least one of the following: the TRS occupies at least one first time domain unit and at least one second time domain unit, and at least one of the first time domain units is included in the second time domain unit; the TRS corresponds to at least one first sequence, and the first sequence is used for multiplexing of the TRS; the TRS corresponds to at least one first frequency domain range; the TRS corresponds to at least one repetition.

37. The apparatus according to claim 36, characterized in that when the TRS occupies a plurality of first time domain units, all or at least some of the first parameters of the TRS on the plurality of first time domain units are the same; wherein, the first parameter includes at least one of the following: frequency domain density; occupied frequency domain resource; time domain density; occupied time domain resource; transmission power.

38. The apparatus according to claim 36, characterized in that When the TRS occupies multiple second time-domain units, at least some of the multiple second time-domain units are discontinuous, or at least some of the multiple second time-domain units are continuous.

39. The apparatus according to claim 36, wherein: The processing unit is further configured to determine the frequency-domain density of the TRS based on a second parameter; Wherein, the second parameter includes at least one of the following: A first threshold, which is used to determine whether to adjust the frequency-domain density; A first indication parameter, which is used to determine the frequency-domain density.

40. The apparatus according to claim 39, wherein: When the first result measured by the tracking reference signal transmission apparatus based on the TRS does not meet the first threshold, the transceiver unit is further configured to send a first message, and the first message is used for a network-side device to determine the frequency-domain density; Wherein, the first result includes at least one of the following: timing, delay spread, frequency offset, Doppler spread, reference signal received power RSRP; Wherein, the first message includes at least one of the following: the first result, a quantization coefficient related to the first result, a target frequency-domain density.

41. The apparatus according to claim 36, wherein: The TRS corresponds to at least one first sequence, wherein the first sequence corresponds to one of the following: One cyclic shift; One orthogonal cover code OCC sequence.

42. The apparatus according to claim 36, wherein: The TRS corresponds to at least one first frequency-domain range, and the first frequency-domain range includes M second frequency-domain units, where M is a positive integer; wherein, the second frequency-domain unit includes one of the following: RB, sub-band, bandwidth part BWP, sub-BWP.

43. The apparatus according to claim 36, wherein: When the TRS corresponds to multiple repetitions, at least one of the following is satisfied between the multiple repetitions: There are K1 fourth time-domain units between the multiple repetitions; There are K2 fifth time-domain units between the starting time-domain positions of the multiple repetitions; There are K3 third frequency-domain units between the multiple repetitions; There are K4 fourth frequency-domain units between the starting frequency-domain positions of the multiple repetitions; Wherein, both K1 and K2 are integers, and K1≥0, K2≥1; both K3 and K4 are integers, and K3≥0, K4≥1.

44. The apparatus according to any one of claims 36 to 43, wherein: When the tracking reference signal transmission apparatus receives multiple TRSs, and the tracking reference signal transmission apparatus performs joint measurement based on the multiple TRSs, at least some of the multiple TRSs have different third parameters, or at least some of the multiple TRSs have the same third parameters; Wherein, the third parameter includes at least one of the following: Frequency-domain density; Time-domain density; Occupied time-domain resources; Occupied frequency-domain resources; Transmission power; Period type; Period; QCL reference.

45. A transmission device for tracking a reference signal, characterized in that, Including: A transceiver unit, configured to send at least one tracking reference signal TRS; Wherein, the at least one TRS is used for time-frequency tracking; Wherein, the TRS satisfies at least one of the following: The TRS occupies at least one first time-domain unit and at least one second time-domain unit, and at least one of the first time-domain units is included in the second time-domain unit; The TRS corresponds to at least one first sequence, and the first sequence is used for multiplexing of the TRS; The TRS corresponds to at least one first frequency-domain range; The TRS corresponds to at least one repetition.

46. The apparatus according to claim 45, wherein When the TRS occupies multiple first time-domain units, all or at least part of the first parameters of the TRS on the multiple first time-domain units are the same or different; Wherein, the first parameter includes at least one of the following: Frequency-domain density; Occupied frequency-domain resource; Time-domain density; Occupied time-domain resource; Transmission power.

47. The apparatus according to claim 45, wherein When the TRS occupies multiple second time-domain units, at least part of the multiple second time-domain units are discontinuous, or at least part of the multiple second time-domain units are continuous.

48. The apparatus according to claim 45, wherein When the TRS corresponds to at least one first sequence, the first sequence corresponds to one of the following: One cyclic shift; One orthogonal cover code OCC sequence.

49. The apparatus according to claim 45, wherein When the TRS corresponds to at least one first frequency-domain range, the first frequency-domain range includes M second frequency-domain units, and M is a positive integer; Wherein, the second frequency-domain unit includes one of the following: RB, sub-band, bandwidth part BWP, sub-BWP.

50. The apparatus according to claim 45, wherein When the TRS corresponds to multiple repetitions, at least one of the following is satisfied between the multiple repetitions: There are K1 fourth time-domain units between the multiple repetitions; There are K2 fifth time-domain units between the starting time-domain positions of the multiple repetitions; There are K3 third frequency-domain units between the multiple repetitions; There are K4 fourth frequency-domain units between the starting frequency-domain positions of the multiple repetitions; Wherein, both K1 and K2 are integers, and K1≥0, K2≥1; both K3 and K4 are integers, and K3≥0, K4≥1.

51. The apparatus according to any one of claims 45 to 50, wherein When the transmission apparatus of the tracking reference signal sends multiple TRSs, and the multiple TRSs are used for joint measurement, at least part of the third parameters of the multiple TRSs are different, or at least part of the third parameters of the multiple TRSs are the same; Wherein, the third parameter includes at least one of the following: Frequency-domain density; Time-domain density; Occupied time-domain resource; Occupied frequency-domain resource; Transmission power; Period type; Period; QCL reference.

52. A terminal, characterized in that, It includes a transceiver, a processor, and a memory. The memory stores programs or instructions that can run on the processor. When the programs or instructions are executed by the processor, the steps of the method for transmitting a tracking reference signal as described in any one of claims 1 to 18 are implemented.

53. A network-side device, characterized in that, It includes a transceiver, a processor, and a memory. The memory stores programs or instructions that can run on the processor. When the programs or instructions are executed by the processor, the steps of the method for transmitting a tracking reference signal as described in any one of claims 19 to 35 are implemented.

54. A readable storage medium, characterized in that, Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the steps of the method for transmitting a tracking reference signal as described in any one of claims 1 - 18 are implemented, or the steps of the method for transmitting a tracking reference signal as described in any one of claims 19 to 35 are implemented.

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