Time frequency tracking method and device, terminal, network side equipment and readable storage medium

Abstract

The invention discloses a time-frequency tracking method, and belongs to the technical field of communication, and the time-frequency tracking method comprises the steps that a terminal receives a first signal from network side equipment, and the first signal comprises a second signal and a TRS; and the terminal performs time-frequency tracking based on the first signal.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to a time-frequency tracking method, apparatus, terminal, network-side equipment and readable storage medium. Background Art

[0002] In the New Radio (NR) system, the network-side device can send a Tracking Reference Signal (TRS) to the terminal so that the terminal can perform time and frequency tracking based on the TRS, thereby improving the transmission performance between the terminal and the network-side device.

[0003] However, since TRS occupies more resources, the overall TRS overhead in the network may be large. In addition, the measurement performance of TRS also needs to be further improved to meet higher transmission performance requirements. Therefore, time-frequency tracking based on TRS needs to be further optimized. Summary of the invention

[0004] The embodiments of the present application provide a time-frequency tracking method, apparatus, terminal, network-side device, and readable storage medium, which can solve the problem of large resource overhead of TRS of network-side devices.

[0005] In a first aspect, a time-frequency tracking method is provided, which is executed by a terminal, and the method includes: the terminal receives a first signal from a network side device, and the first signal includes a second signal and a TRS; and the terminal performs time-frequency tracking based on the first signal.

[0006] In a second aspect, a time-frequency synchronization method is provided, which is executed by a network side device. The method includes: the network side device sends a first signal to a terminal, the first signal includes a second signal and a TRS, and the first signal is used for time-frequency tracking.

[0007] In a third aspect, a time-frequency synchronization device is provided, the time-frequency synchronization device comprising: a receiving module, configured to receive a first signal from a network side device, the first signal comprising a second signal and a TRS; and a tracking module, configured to perform time-frequency tracking based on the first signal received by the receiving module.

[0008] In a fourth aspect, a time-frequency synchronization device is provided, which includes: a sending module, used to send a first signal to a terminal, the first signal includes a second signal and a TRS, and the first signal is used for time-frequency tracking.

[0009] In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0010] In a sixth aspect, a terminal is provided, including a processor and a communication interface. The communication interface is configured to receive a first signal from a network-side device, where the first signal includes a second signal and a TRS, and the processor is configured to perform time-frequency tracking based on the first signal.

[0011] In a seventh aspect, a network-side device is provided. The network-side device includes a processor and a memory. The memory stores a program or instructions that can be 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.

[0012] In an eighth aspect, a network-side device is provided, including a processor and a communication interface. The communication interface is configured to send a first signal to a terminal, where the first signal includes a second signal and a TRS, and the first signal is used for time-frequency tracking.

[0013] In a ninth aspect, a readable storage medium is provided. A program or instructions are stored on the readable storage medium. 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.

[0014] 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.

[0015] In an eleventh aspect, a chip is provided. The chip includes a processor and a communication interface. The communication interface is coupled to the processor, and the processor is configured to run a program or instructions to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0016] In a twelfth aspect, a computer program / program product is provided. The computer program / program product is stored in a storage medium. The program / program product is executed by at least one processor to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0017] In an embodiment of the present application, a terminal can receive a first signal including a second signal and a TRS from a network-side device, and perform time-frequency tracking based on the first signal. Since the terminal can perform time-frequency tracking based on the second signal and the TRS, rather than only based on the TRS, on the one hand, the network-side device can use fewer TRS resources to send the TRS to the terminal, thereby reducing the resource overhead of the TRS; on the other hand, through the joint measurement of the second signal and the TRS, the performance of time-frequency tracking can also be further improved, thereby improving the transmission performance of the network.

[0018] In an embodiment of the present application, a network-side device may send a first signal including a second signal and a TRS to a terminal, where the first signal is used for time-frequency tracking. Since the network-side device can send the second signal and the TRS to the terminal so that the terminal can perform time-frequency tracking based on the second signal and the TRS, rather than only sending the TRS to the terminal, on the one hand, the network-side device can use fewer TRS resources to send the TRS to the terminal, thereby reducing the resource overhead of the TRS; on the other hand, through the joint measurement of the second signal and the TRS, the performance of time-frequency tracking can also be further improved, thereby improving the transmission performance of the network. Description of the Drawings

[0019] Figure 1 is a block diagram of a wireless communication system provided by an embodiment of the present application;

[0020] Figure 2 is one of the schematic flowcharts of the time-frequency tracking method provided by an embodiment of the present application;

[0021] Figure 3 is one of the schematic diagrams of the time-division multiplexing relationship between the second signal and the TRS;

[0022] Figure 4 is the second schematic diagram of the time-division multiplexing relationship between the second signal and the TRS;

[0023] Figure 5 is the third schematic diagram of the time-division multiplexing relationship between the second signal and the TRS;

[0024] Figure 6 is the fourth schematic diagram of the time-division multiplexing relationship between the second signal and the TRS;

[0025] Figure 7 is one of the schematic diagrams of the frequency-division multiplexing relationship between the second signal and the TRS;

[0026] Figure 8 is the second schematic diagram of the frequency-division multiplexing relationship between the second signal and the TRS;

[0027] Figure 9 is the third schematic diagram of the frequency-division multiplexing relationship between the second signal and the TRS;

[0028] Figure 10 is the fourth schematic diagram of the frequency-division multiplexing relationship between the second signal and the TRS;

[0029] Figure 11 is one of the schematic diagrams of the overlapping relationship where the second signal and the TRS at least partially overlap;

[0030] Figure 12 is the second schematic diagram of the overlapping relationship where the second signal and the TRS at least partially overlap;

[0031] Figure 13 It is the third schematic diagram of the overlapping relationship where the second signal and the TRS overlap at least partially;

[0032] Figure 14 It is the fourth schematic diagram of the overlapping relationship where the second signal and the TRS overlap at least partially;

[0033] Figure 15 It is the second flowchart schematic diagram of the time-frequency tracking method provided by the embodiment of the present application;

[0034] Figure 16 It is the first structural schematic diagram of the time-frequency tracking device provided by the embodiment of the present application;

[0035] Figure 17 It is the second structural schematic diagram of the time-frequency tracking device provided by the embodiment of the present application;

[0036] Figure 18 It is the hardware structural schematic diagram of the communication device provided by the embodiment of the present application;

[0037] Figure 19 It is the hardware structural schematic diagram of the terminal provided by the embodiment of the present application;

[0038] Figure 20 It is the hardware structural schematic diagram of the network-side device provided by the embodiment of the present application. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. 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.

[0040] The following will explain the terms related to the embodiments of the present application.

[0041] 1. Synchronization signal block

[0042] Generally, in a New Radio (NR) system, a Synchronization Signal and PBCH block (SSB) is used for time-frequency synchronization of initial access.

[0043] Among them, the SSB consists of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), a Physical Broadcast Channel (PBCH), and a Demodulation Reference Signal (DMRS) of the PBCH.

[0044] The PSS and SSS are used for coarse time-frequency synchronization. The PBCH is used to carry the Master Information Block (MIB) of the broadcast message. The DMRS of the PBCH is used for demodulation of the PBCH. In addition, the entire SSB occupies 4 Orthogonal Frequency-Division Multiplexing (OFDM) symbols in the time domain and up to 20 Resource Blocks (RBs) in the frequency domain. Due to the limited time-frequency occupied resources of the SSB, only relatively preliminary time-frequency coarse synchronization can be performed based on the SSB.

[0045] When the terminal receives the SSB, the terminal can first detect the PSS and obtain the physical cell ID based on sequence correlation and obtain preliminary time-frequency synchronization; then detect the SSS and obtain the physical cell ID based on sequence correlation, so as to know the complete Physical Cell ID (PCI), that is, the terminal can perform further adjustment of the frequency offset based on the PSS and SSS. Then the terminal detects the DMRS of the PBCH for channel estimation and demodulates the PBCH.

[0046] 2. TRS

[0047] In the NR system, the TRS is used for time-frequency tracking (more refined synchronization than SSB), that is, 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 DMRS of the Physical Downlink Control Channel (PDCCH) and the Physical Downlink Shared Channel (PDSCH) to complete more accurate channel estimation. In the design of Protocol Rel-15, the TRS is used for terminals in the Radio Resource Control (RRC) connected state, that is, when the terminal enters the RRC connected state, the time-frequency tracking performance is further adjusted on the basis of the original SSB. For the terminal energy saving of Rel-17, the TRS can also be used for non-connected state terminals for time-frequency tracking.

[0048] The TRS is a special set of Channel State Information Reference Signal (CSI-RS) resources. For the TRS deployed in Frequency Range (FR) 1 (low frequency), a terminal can be configured with one or more TRS resource sets. Each TRS resource set contains 4 CSI-RS resources, and these 4 CSI-RS resources exist in two consecutive time slots, and there are 2 CSI-RS resources in each time slot; for the TRS deployed in FR2 (high frequency), a terminal can also be configured with one or more TRS resource sets. Among them, the CSI-RS resources contained 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, which are 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] slots, where 2 μ is related to the subcarrier spacing. In the frequency domain, the bandwidth of the TRS can be the Bandwidth Part (BWP) or min(52, BWP).

[0049] Assume that the TRS is deployed in FR1 with a period of 20 time slots (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 sub-carrier spacing (SCS) is 15 KHz. Then the number of RBs containing TRS in the frequency domain is 52.

[0050] 3. Quasi-Co-Location (QCL) Reference

[0051] 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.

[0052] Four different types of QCL relationships are designed in NR to cope with different transmission scenarios. The specific QCL reference types QCL-Type are as follows:

[0053] 1) Type A: {Doppler frequency offset, Doppler spread, average delay, delay spread};

[0054] 2) Type B: {Doppler frequency offset, Doppler spread};

[0055] 3) Type C: {Doppler frequency offset, average delay};

[0056] 4) Type D: {Spatial reception parameters}.

[0057] 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 device can configure the TRS for time-frequency fine synchronization. At this time, the reference source of QCL reference Type A for PDCCH and PDSCH transmissions is the TRS.

[0058] 4. Other Terms

[0059] The terms "first", "second", etc. in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the embodiments of this application can be implemented in an order other than those illustrated or described herein. The objects distinguished by "first" and "second" are generally of the same category, and the number of objects is not limited. For example, the first object can be one or more. In addition, "or" in this application means at least one of the connected objects. For example, "A or B" covers three scenarios, namely, Scenario 1: including A and not including B; Scenario 2: including B and not including A; Scenario 3: including both A and B. The character " / " generally indicates an "or" relationship between the associated objects before and after.

[0060] 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 the sender clearly informing the recipient of specific information, operations to be performed, or request results, etc. in the sent indication; an indirect indication can be understood as the recipient determining the corresponding information based on the indication sent by the sender, or making a judgment and determining the operations to be performed or request results, etc. according to the judgment result.

[0061] The terms "at least one (item)", "at least one of", etc. in this application refer to any one, any two, or a combination of two or more of the included objects. For example, at least one (item) of a, b, and c can represent: "a", "b", "c", "a and b", "a and c", "b and c", and "a, b, and c", where a, b, and c can be single or multiple. Similarly, "at least two (items)" means two or more, and its meaning is similar to that of "at least one (item)".

[0062] It should be noted that the technology described in the embodiments of this application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, and can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), or other systems. The terms "system" and "network" in the embodiments of this application are often used interchangeably, and the described technology can be used 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 the NR term 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.

[0063] Figure 1Block diagram of a wireless communication system to which embodiments of the present application can be applied. The wireless communication system includes a terminal 11 and a network-side device 12. Among them, the terminal 11 can be a mobile phone, a tablet personal computer, a laptop computer, a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device, a flight vehicle, a vehicle user equipment (VUE), a shipborne device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, TVs, washing machines, or furniture, etc.), a game console, a personal computer (PC), a teller machine, or a self-service machine, etc. Wearable devices include: smart watches, smart bracelets, smart earphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart ankle chains, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle user equipment can also be referred to as a vehicle terminal, a vehicle controller, a vehicle module, a vehicle component, a vehicle chip, or a vehicle unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application. The network-side device 12 can include an access network device or a core network device. Among them, the access network device can also be referred to as a radio access network (RAN) device, a radio access network function, or a radio access network unit. The access network device can include a base station, a wireless local area network (WLAN) access point (AP), or a wireless fidelity (WiFi) node, etc.Among them, the base station can be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home Node B (HNB), home evolved Node B, Transmission Reception Point (TRP), or some other suitable term in the art. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiments of the present 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.

[0064] Next, with reference to the accompanying drawings, the time-frequency tracking method, device, terminal, network-side device, and readable storage medium provided by the embodiments of the present application will be described in detail through some embodiments and their application scenarios.

[0065] The time-frequency tracking method provided by the embodiments of the present application may be executed by a time-frequency tracking device, or a terminal, or a functional module or entity in the terminal. In the embodiments of the present application, the case where the terminal executes the time-frequency tracking method is taken as an example to illustrate the time-frequency tracking method provided by the embodiments of the present application.

[0066] Figure 2 The flowchart of a time-frequency tracking method provided by the embodiments of the present application is shown. As Figure 2 shown, the time-frequency tracking method provided by the embodiments of the present application may include the following steps 101 and 102.

[0067] Step 101: The terminal receives a first signal from the network-side device.

[0068] In the embodiments of the present application, the above-mentioned first signal includes a second signal and a TRS.

[0069] In some embodiments of the present application, the above-mentioned second signal may include at least one of the following: SSB, Demodulation Reference Signal (DMRS), Channel State Information Reference Signal (CSI-RS). Of course, the second signal may also include other reference signals, which are not limited in the embodiments of the present application, and those skilled in the art can select them according to requirements.

[0070] Optionally, the above-mentioned SSB may include at least one of the following: synchronization signal, broadcast signal, broadcast channel, DMRS of the broadcast channel, reference signal for time-domain tracking or frequency-domain tracking, other system message downlink broadcast channel.

[0071] Among them, the above-mentioned synchronization signal may include at least one of the following: PSS, SSS. Any one of PSS and SSS includes at least one of the following: synchronization sequence, synchronization pilot, reference signal for time-domain tracking or frequency-domain tracking. Of course, the above-mentioned synchronization signal may also include other signals, which are not limited in the embodiments of the present application, and those skilled in the art can select them according to requirements.

[0072] Among them, the broadcast channel may include at least one of the following: master information block broadcast channel, synchronization channel, other system message broadcast channel.

[0073] Optionally, the TRS may include one or more reference signals for time-frequency tracking.

[0074] In some embodiments of the present application, the number of the above-mentioned first signals may be at least one, the number of the above-mentioned second signals may be at least one, and the number of the above-mentioned TRSs may be at least one. The number of the second signal and the TRS may be the same or different.

[0075] In some embodiments of the present application, the above-mentioned second signal and the TRS may be multiplexed or not multiplexed. When not multiplexed, that is, the terminal separately measures the above-mentioned second signal and the TRS, and does not perform joint measurement of the two.

[0076] In some embodiments of the present application, before the above-mentioned step 102, the time-frequency tracking method provided by the embodiments of the present application may further include the following step 201.

[0077] Step 201: The terminal determines at least one of the following through the first information:

[0078] Whether the second signal and the TRS are multiplexed;

[0079] The multiplexing method of the second signal and the TRS.

[0080] In the embodiments of the present application, the above first information is information configured or indicated by a network device for a terminal, or information agreed upon by a protocol.

[0081] It should be noted that the embodiments of the present application do not limit the execution order of the above steps 201 and 101. In one example, the terminal may first execute step 201 and then execute step 101; in another example, the terminal may first execute step 101 and then execute step 201; in still another example, the terminal may execute step 101 while executing step 201.

[0082] Optionally, the above first information may include at least one of the following:

[0083] Configuration information sent by the network device to the terminal;

[0084] Indication information sent by the network device to the terminal;

[0085] Synchronization signal in the second signal;

[0086] Cell identifier corresponding to the second signal;

[0087] DMRS of the broadcast channel in the second signal;

[0088] Synchronization grid;

[0089] Index of the second signal;

[0090] System message;

[0091] Layer 1 payload;

[0092] Random access response message.

[0093] Among them, the above random access response message may include at least one of the following: message Msg 2, Msg4, MsgB.

[0094] In the embodiments of the present application, the above first information may specifically be used to indicate at least one of the following multiplexing information: whether the second signal and the TRS are multiplexed, and the multiplexing method of the second signal and the TRS.

[0095] Optionally, the network device may also indicate when the second signal and the TRS are multiplexed through the first information, such as the cycle ratio of their multiplexing, or the time domain position (such as time slot) where the TRS or the second signal appears. Among them, the indication method may be to determine the time domain position where the TRS or the second signal appears in the form of a bitmap.

[0096] Optionally, the network-side device may also indicate the first message through DownLink Control Information (DCI). For example, the DCI is group-common DCI.

[0097] As can be seen, since the terminal can accurately determine the multiplexing information of the second signal and the TRS through the first information, in subsequent steps, the terminal can accurately determine the method of time-frequency tracking according to the multiplexing information of the second signal and the TRS. Therefore, the performance of the terminal for time-frequency tracking can be improved.

[0098] In some embodiments of the present application, the manner in which the second signal and the TRS are multiplexed includes one of the following:

[0099] The second signal and the TRS are time-division multiplexed;

[0100] The second signal and the TRS are frequency-division multiplexed;

[0101] The second signal and the TRS at least partially overlap.

[0102] In the embodiments of the present application, the manner in which the second signal and the TRS are multiplexed may be agreed upon by the protocol or configured by the network-side device.

[0103] Among them, the time-division multiplexing of the second signal and the TRS can be understood as: the time-domain resources occupied by the second signal and the time-domain resources occupied by the TRS are different, that is, the second signal and the TRS are located on different time-domain resources. In the case of time-division multiplexing of the second signal and the TRS, the second signal and the TRS are combined into a joint measurement pattern in the time domain, thereby increasing the time span or the number of time units occupied by the second signal or the TRS.

[0104] Among them, the frequency-division multiplexing of the second signal and the TRS can be understood as: the frequency-domain resources occupied by the second signal and the frequency-domain resources occupied by the TRS are different, that is, the second signal and the TRS are located on different frequency-domain resources. In the case of frequency-division multiplexing of the second signal and the TRS, the second signal and the TRS are combined into a joint measurement pattern in the frequency domain, thereby increasing the bandwidth of the second signal or the TRS.

[0105] Among them, the at least partial overlap of the second signal and the TRS can be understood as: at least part of the time-frequency domain resources occupied by the second signal and at least part of the time-frequency domain resources occupied by the TRS overlap or conflict, that is, the second signal and the TRS overlap or conflict in the time-frequency domain resources. In the case of at least partial overlap of the second signal and the TRS, the second signal and the TRS can be combined into a joint measurement pattern, thereby reducing the time-frequency domain resources occupied by the TRS or the SSB.

[0106] It can be seen that since the embodiments of the present application specify different ways of multiplexing the second signal and the TRS, the terminal can perform time-frequency tracking in corresponding different ways according to the different ways of multiplexing the second signal and the TRS, rather than using a default way for time-frequency tracking. Therefore, the flexibility of the terminal for time-frequency tracking can be improved.

[0107] In some embodiments of the present application, the above-mentioned second signal and the TRS are time-division multiplexed, including at least one of the following modes:

[0108] The first mode, in the first mode, the last first time unit occupied by the second signal is the P-th first time unit before the first first time unit occupied by the TRS, where P≥0;

[0109] The second mode, in the second mode, the last first time unit occupied by the TRS is the Q-th first time unit before the first first time unit occupied by the second signal, where Q≥0;

[0110] The third mode, in the third mode, the first first time unit occupied by the second signal is the S-th first time unit after the first first time unit occupied by the TRS, and the last first time unit occupied by the second signal is the T-th first time unit before the last first time unit occupied by the TRS, where S≥0 and T≥0.

[0111] Among them, when the time-division multiplexing of the second signal and the TRS includes the first mode, if P = 0, it can be considered that the last first time unit occupied by the second signal and the first first time unit occupied by the TRS are the same first time unit.

[0112] Among them, when the time-division multiplexing of the second signal and the TRS includes the second mode, if Q = 0, it can be considered that the last first time unit occupied by the TRS and the first first time unit occupied by the second signal are the same first time unit.

[0113] Among them, when the time-division multiplexing of the second signal and the TRS includes the third mode, if S = 0, it can be considered that the first first time unit occupied by the second signal and the first first time unit occupied by the TRS are the same first time unit; if T = 0, the last first time unit occupied by the second signal and the last first time unit occupied by the TRS are the same first time unit.

[0114] Optionally, the above-mentioned first time unit can be any one of the following: symbol, time slot, sub-time slot, frame, sub-frame.

[0115] It can be seen that since the embodiments of the present application define different modes of time-division multiplexing between the second signal and the TRS, the terminal can perform time-frequency tracking in a targeted manner using corresponding different methods according to the characteristics of different modes of time-division multiplexing between the second signal and the TRS, rather than using a default method for time-frequency tracking. Therefore, the performance of the terminal in time-frequency tracking can be improved.

[0116] The following will use two different examples to illustrate the modes of time-division multiplexing between the second signal and the TRS.

[0117] Example 1: The mode of time-division multiplexing between the second signal and the TRS is the first mode.

[0118] Case 1, as Figure 3 shown, assume that a TRS occupies 2 first time units, such as OFDM symbols. The TRS on the 2 OFDM symbols are respectively called TRS1 and TRS2. Among them, TRS1 and TRS2 belong to the same TRS resource or resource set. The TRS1 and TRS2 are located on 2 OFDM symbols in a time slot (such as time slot n). The second signal (such as SSB) occupies 4 first time units, such as OFDM symbols, that is, the synchronization signal 1 in the SSB occupies 1 OFDM symbol, the broadcast channel 1 in the SSB occupies 1 OFDM symbol, the synchronization signal 2 in the SSB occupies 1 OFDM symbol, and the broadcast channel 2 in the SSB occupies 1 OFDM symbol. And the TRS and the SSB are located in the same time slot (that is, time slot n). Among them, the broadcast channel 1 and the broadcast channel 2 can also be understood as two parts of the same broadcast signal. In this way, the last OFDM symbol occupied by the SSB (that is, the OFDM symbol occupied by the broadcast channel 2 in the SSB) is the first P OFDM symbols before the first OFDM symbol occupied by the TRS (that is, the OFDM symbol occupied by TRS1), and P = 2.

[0119] It can be understood that in subsequent steps (such as step 102), the terminal can use the synchronization signal in the SSB and the TRS for time-frequency tracking. For example, jointly estimate the frequency offset and Doppler spread using the synchronization signal in the SSB and the TRS, and can also use the TRS to further improve the estimation performance of timing and delay spread.

[0120] Case 2, as Figure 4As shown in the figure, assume that a TRS occupies 4 first time units, such as OFDM symbols. The TRSs on the 4 OFDM symbols are respectively called TRS1 to TRS4. Among them, TRS1 to TRS4 belong to the same TRS resource or resource set. Among them, TRS1 and TRS2 are located on two OFDM symbols of a time slot (such as time slot n), and TRS3 and TRS4 are located on two OFDM symbols of another time slot (such as time slot n + 1). The second signal (such as SSB) occupies 4 first time units, such as OFDM symbols, that is, the synchronization signal 1 in the SSB occupies 1 OFDM symbol, the broadcast channel 1 in the SSB occupies 1 OFDM symbol, the synchronization signal 2 in the SSB occupies 1 OFDM symbol, and the broadcast channel 2 in the SSB occupies 1 OFDM symbol, and this SSB is located within the above-mentioned one time slot (that is, time slot n). Among them, broadcast channel 1 and broadcast channel 2 can also be understood as two parts of the same broadcast signal. In this way, the last OFDM symbol occupied by the SSB (that is, the OFDM symbol occupied by the broadcast channel 2 in the SSB) is the first P OFDM symbols before the first OFDM symbol occupied by the TRS (that is, the OFDM symbol occupied by TRS1), and P = 2.

[0121] It can be understood that Figure 4 the pattern of the joint measurement shown in the figure can provide better time-frequency synchronization performance, especially for the estimation of Doppler spread. Since there are more OFDM symbols in the time domain, its estimation performance is improved.

[0122] Example 2: The time-division multiplexing mode of the second signal and the TRS is the third mode.

[0123] Case 3, as Figure 5As shown in the figure, assume that a TRS occupies 2 first time units, such as OFDM symbols. The TRSs on 2 OFDM symbols are respectively called TRS1 and TRS2. Among them, TRS1 and TRS2 belong to the same TRS resource or resource set. Among them, TRS1 and TRS2 are located on 2 OFDM symbols of a time slot (such as time slot n). The second signal (such as SSB) occupies 4 first time units, such as OFDM symbols, that is, the synchronization signal 1 in the SSB occupies 1 OFDM symbol, the broadcast channel 1 in the SSB occupies 1 OFDM symbol, the synchronization signal 2 in the SSB occupies 1 OFDM symbol, and the broadcast channel 2 in the SSB occupies 1 OFDM symbol. And these two TRSs and the SSB are located in the same time slot (that is, time slot n). Among them, the broadcast channel 1 and the broadcast channel 2 can also be understood as two parts of the same broadcast signal. In this way, the first OFDM symbol occupied by the SSB (that is, the OFDM symbol occupied by the synchronization signal 1 in the SSB) is the S-th OFDM symbol after the first OFDM symbol occupied by the TRS (that is, the OFDM symbol occupied by TRS1), S = 2, and the last OFDM symbol occupied by the SSB (that is, the OFDM symbol occupied by the broadcast channel 2 in the SSB) is the T-th OFDM symbol before the last OFDM symbol occupied by the TRS (that is, the OFDM symbol occupied by TRS2), T = 1.

[0124] It can be understood that Figure 5 all the symbols occupied by the SSB in the figure are located within the two symbols occupied by the TRS. The overall occupancy of this combined measurement pattern is compact, which is beneficial to resource scheduling. In addition, it is beneficial for the terminal to quickly perform time-frequency synchronization in a short time.

[0125] Case 4, as Figure 6 shown in the figure, assume that a TRS occupies 4 first time units, such as OFDM symbols. The TRSs on 4 OFDM symbols are respectively called TRS1 to TRS4. Among them, TRS1 to TRS4 belong to the same TRS resource or resource set. Among them, TRS1 and TRS2 are located on 2 OFDM symbols of a time slot (such as time slot n), and TRS3 and TRS4 are located on 2 OFDM symbols of another time slot (such as time slot n + 1). The second signal (such as SSB) occupies 4 first time units, such as OFDM symbols, that is, the synchronization signal 1 in the SSB occupies 1 OFDM symbol, the broadcast channel 1 in the SSB occupies 1 OFDM symbol, the synchronization signal 2 in the SSB occupies 1 OFDM symbol, and the broadcast channel 2 in the SSB occupies 1 OFDM symbol. And this SSB is located between time slot n and time slot n + 1, that is, a part of the signal of this SSB is located in time slot n, and another part of the signal is located in time slot n + 1. It should be noted that it can also be that this SSB is located in time slot n, or in time slot n + 1.

[0126] In some embodiments of the present application, when the second signal and the TRS are time-division multiplexed, at least one of the following is satisfied between the second signal and the TRS:

[0127] The bandwidth of the second signal is within the bandwidth of the TRS;

[0128] The second signal and the TRS are within the same second time unit;

[0129] The second signal and the TRS are separated by X second time units in the time domain, where X ≥ 1.

[0130] Optionally, the above second time unit can be any one of the following: OFDM symbol, sub-slot, slot, frame, sub-frame.

[0131] Optionally, the value of the above X can be pre-configured by the network-side device or agreed upon by the protocol.

[0132] Exemplarily, assuming X = 1, the second signal and the TRS are separated by 1 second time unit (such as a slot) in the time domain, that is, the second signal and the TRS are respectively in adjacent slots.

[0133] It can be seen that since the conditions that need to be satisfied between the second signal and the TRS are specified in the embodiments of the present application when the second signal and the TRS are time-division multiplexed, when the terminal determines that the second signal and the TRS are time-division multiplexed, it can accurately perform time-frequency tracking according to the above conditions. Therefore, the performance of the terminal for time-frequency tracking can be improved.

[0134] In some embodiments of the present application, the above second signal and the TRS are frequency-division multiplexed, including at least one of the following modes:

[0135] Fourth mode, in the fourth mode, the bandwidth of the second signal is adjacent to the bandwidth of the TRS;

[0136] Fifth mode, in the fifth mode, the second signal and the TRS are separated by Y first frequency domain units in the frequency domain, where Y ≥ 1;

[0137] Sixth mode, in the sixth mode, the bandwidth of the second signal overlaps with the bandwidth of the TRS, and the second frequency domain units occupied by the second signal and the second frequency domain units occupied by the TRS are different.

[0138] Optionally, the bandwidth of the above second signal being adjacent to the bandwidth of the TRS includes at least one of the following:

[0139] The bandwidth of the synchronization signal in the second signal is adjacent to the bandwidth of the TRS;

[0140] The bandwidth of the broadcast channel in the second signal is adjacent to the bandwidth of the TRS;

[0141] The bandwidth of the DMRS of the broadcast channel in the second signal is adjacent to the bandwidth of the TRS;

[0142] The maximum bandwidth of all signals in the second signal is adjacent to the bandwidth of the TRS.

[0143] It can be seen that since the embodiments of the present application stipulate various situations where the bandwidth of the second signal is adjacent to the bandwidth of the TRS in the case of frequency division multiplexing between the second signal and the TRS, when the terminal determines that the second signal and the TRS are frequency division multiplexed, it can accurately perform time-frequency tracking based on the above various situations. Therefore, the performance of the terminal for time-frequency tracking can be improved.

[0144] Optionally, the value of the above Y can be pre-configured by the network-side device or agreed upon by the protocol.

[0145] Optionally, the above first frequency domain unit can be any one of the following: Resource Element (RE), RB, RB group, subcarrier, carrier, sub-band, frequency band.

[0146] Optionally, the above second frequency domain unit can be any one of the following: RE, RB, RB group, subcarrier, carrier, sub-band, frequency band.

[0147] Exemplarily, for the case where the bandwidth of the second signal overlaps with the bandwidth of the TRS and the second frequency domain unit occupied by the second signal is different from the second frequency domain unit occupied by the TRS, it can be understood that the TRS does not overlap with the second signal at the RE level (i.e., frequency division multiplexing at the RE level). For example, the TRS does not overlap with the synchronization signal of the SSB at the RE level.

[0148] It can be seen that since the embodiments of the present application stipulate different modes of frequency division multiplexing between the second signal and the TRS, the terminal can adopt corresponding different methods to perform time-frequency tracking specifically according to the characteristics of different modes of frequency division multiplexing between the second signal and the TRS, rather than using a default method for time-frequency tracking. Therefore, the performance of the terminal for time-frequency tracking can be improved.

[0149] In some embodiments of the present application, the following at least one is satisfied between the time domain resources occupied by the second signal and the time domain resources occupied by the TRS:

[0150] The first third time unit occupied by the second signal is the same as the first third time unit occupied by the TRS;

[0151] The last third time unit occupied by the second signal is the same as the last third time unit occupied by the TRS;

[0152] The third time unit occupied by the synchronization signal in the second signal is the same as at least part of the third time unit occupied by the TRS;

[0153] The third time unit occupied by the DMRS of the broadcast channel in the second signal is the same as at least part of the third time unit occupied by the TRS;

[0154] At least part of the third time unit occupied by the synchronization signal in the second signal is the same as the third time unit occupied by the TRS;

[0155] At least part of the third time unit occupied by the DMRS of the broadcast channel in the second signal is the same as the third time unit occupied by the TRS.

[0156] Optionally, the above third time unit can be any of the following: OFDM symbol, time slot, sub - time slot, frame, sub - frame.

[0157] Optionally, when the first third time unit occupied by the second signal is the same as the first third time unit occupied by the TRS among the time - domain resources occupied by the second signal and the TRS, it can be understood that the starting time - domain positions of the second signal and the TRS are the same or aligned.

[0158] Optionally, when the last third time unit occupied by the second signal is the same as the last third time unit occupied by the TRS among the time - domain resources occupied by the second signal and the TRS, it can be understood that the last time - domain positions of the second signal and the TRS are the same or aligned.

[0159] Optionally, when the third time unit occupied by the synchronization signal in the second signal is the same as at least part of the third time unit occupied by the TRS among the time - domain resources occupied by the second signal and the TRS, it can be understood that the time - domain position of the synchronization signal in the second signal is the same or aligned with at least part of the time - domain position of the TRS.

[0160] Exemplarily, assume that the second signal is an SSB, and the synchronization signal in the SSB is a PSS. Then, when the third time unit occupied by the synchronization signal in the second signal is the same as at least part of the third time unit occupied by the TRS among the time - domain resources occupied by the second signal and the TRS, the time - domain position of the PSS in this SSB can be aligned with the first symbol of the TRS, or multiple PSSs in this SSB can be aligned with multiple symbols of the TRS.

[0161] Exemplarily, assume that the second signal is the SSB, and the synchronization signal in the SSB is the SSS. Then, when the third time unit occupied by the synchronization signal in the second signal is the same as at least part of the third time unit occupied by the TRS between the time domain resources occupied by the second signal and the time domain resources occupied by the TRS, the time domain position of the SSS in the SSB can be aligned with the first symbol of the TRS, or multiple SSSs in the SSB can be aligned with multiple symbols of the TRS.

[0162] It can be seen that since the embodiments of the present application specify the conditions that need to be satisfied between the time domain resources occupied by the second signal and the time domain resources occupied by the TRS, when the terminal determines frequency division multiplexing of the second signal and the TRS, it can accurately perform time-frequency tracking according to the above conditions. Therefore, the performance of the terminal for time-frequency tracking can be improved.

[0163] The following will illustrate the mode of frequency division multiplexing of the second signal and the TRS by way of examples.

[0164] Example 3: The mode of frequency division multiplexing of the second signal and the TRS is the fourth mode.

[0165] Case 5: As Figure 7 shown, assume that two TRSs respectively occupy 2 third time units, such as OFDM symbols. The TRSs on one OFDM symbol are respectively called TRS1 and TRS2, and the TRSs on the other OFDM symbol are respectively called TRS3 and TRS4. Among them, TRS1 and TRS3 belong to one TRS resource or resource set, and TRS2 and TRS4 belong to another TRS resource or resource set. The second signal (such as the SSB) occupies 4 third time units, such as OFDM symbols, that is, the synchronization signal 1 in the SSB occupies 1 OFDM symbol, the broadcast channel 1 in the SSB occupies 1 OFDM symbol, the synchronization signal 2 in the SSB occupies 1 OFDM symbol, and the broadcast channel 2 in the SSB occupies 1 OFDM symbol. And the two TRSs and the SSB are located in the same time slot, where the broadcast channel 1 and the broadcast channel 2 can also be understood as two parts of the same broadcast signal. In this way, TRS1 and TRS2 can be aligned with the synchronization signal 1 in the SSB, TRS3 and TRS4 can be aligned with the synchronization signal 2, and the bandwidths of TRS1 to TRS4 are adjacent to the bandwidths of the synchronization signal 1 and the synchronization signal 2.

[0166] Case 6: As Figure 8As shown in the figure, assume that two TRSs each occupy 2 third time units, such as OFDM symbols. The TRSs on one OFDM symbol are respectively called TRS1 and TRS2, and the TRSs on the other OFDM symbol are respectively called TRS3 and TRS4. Among them, TRS1 and TRS3 belong to one TRS resource or resource set, and TRS2 and TRS4 belong to another TRS resource or resource set. The second signal (such as SSB) occupies 4 third time units, such as OFDM symbols, that is, the synchronization signal 1 in the SSB occupies 1 OFDM symbol, the broadcast channel 1 in the SSB occupies 1 OFDM symbol, the synchronization signal 2 in the SSB occupies 1 OFDM symbol, and the broadcast channel 2 in the SSB occupies 1 OFDM symbol. And these two TRSs and the SSB are located in the same time slot. Among them, broadcast channel 1 and broadcast channel 2 can also be understood as two parts of the same broadcast signal. In this way, TRS1 and TRS2 are aligned with the synchronization signal 1 in the SSB, and the bandwidths of TRS1 and TRS2 are adjacent to the bandwidth of the synchronization signal 1.

[0167] Case 7: As Figure 9 or Figure 10 shown in the figure, assume that two TRSs each occupy 2 third time units, such as OFDM symbols. The TRSs on one OFDM symbol are respectively called TRS1 and TRS2, and the TRSs on the other OFDM symbol are respectively called TRS3 and TRS4. Among them, TRS1 and TRS3 belong to one TRS resource or resource set, and TRS2 and TRS4 belong to another TRS resource or resource set. The second signal (such as SSB) occupies 4 third time units, such as OFDM symbols, that is, the synchronization signal 1 in the SSB occupies 1 OFDM symbol, the broadcast channel 1 in the SSB occupies 1 OFDM symbol, the synchronization signal 2 in the SSB occupies 1 OFDM symbol, and the broadcast channel 2 in the SSB occupies 1 OFDM symbol. And these two TRSs and the SSB are located in the same time slot. Among them, broadcast channel 1 and broadcast channel 2 can also be understood as two parts of the same broadcast signal. In this way, as Figure 9 shown in the figure, TRS1 and TRS2 are aligned with the synchronization signal 2 in the SSB, and the bandwidths of TRS1 and TRS2 are adjacent to the bandwidth of the synchronization signal 2. Or, as Figure 10 shown in the figure, TRS3 and TRS4 are aligned with the synchronization signal 2 in the SSB, and the bandwidths of TRS3 and TRS4 are adjacent to the bandwidth of the synchronization signal 2.

[0168] Through the combined measurement patterns of TRS and SSB in the above Cases 5, 6, and 7, the bandwidths of TRS and SSB can be effectively increased, thereby effectively improving the performance of time-frequency estimation.

[0169] In some embodiments of the present application, the above-mentioned second signal and TRS at least partially overlap, including at least one of the following modes:

[0170] The seventh mode, in which the synchronization signal in the second signal and the TRS at least partially overlap;

[0171] The eighth mode, in which the broadcast channel in the second signal and the TRS at least partially overlap;

[0172] The ninth mode, in which the broadcast channel DMRS in the second signal and the TRS at least partially overlap.

[0173] It can be seen that since the embodiments of the present application define different overlapping manners between the second signal and the TRS, the terminal can perform time-frequency tracking in a targeted manner according to the characteristics of different overlapping manners between the second signal and the TRS, rather than using a default manner for time-frequency tracking. Therefore, the performance of the terminal in time-frequency tracking can be improved.

[0174] In some embodiments of the present application, the mode in which the above-mentioned second signal and TRS at least partially overlap is determined by at least one of the following:

[0175] The synchronization signal in the second signal;

[0176] The cell identifier corresponding to the second signal;

[0177] The DMRS of the broadcast channel in the second signal;

[0178] Synchronization grid;

[0179] The index of the second signal;

[0180] System message;

[0181] Layer 1 payload;

[0182] Random access response message.

[0183] It can be seen that since the embodiments of the present application define the determination method of the mode in which the second signal and the TRS at least partially overlap, the terminal can accurately determine the overlapping manner between the second signal and the TRS according to this determination method.

[0184] In some embodiments of the present application, when the second signal and the TRS at least partially overlap, before the above-mentioned step 102, the time-frequency tracking method provided by the embodiments of the present application may further include the following step 202.

[0185] Step 202: The terminal performs a first operation on the third signal.

[0186] In the embodiments of the present application, the above-mentioned third signal includes at least one of the following: the signal in the second signal that overlaps with the TRS, the signal in the TRS that overlaps with the second signal; the above-mentioned first operation includes one of the following: discarding, puncturing, rate matching.

[0187] It can be understood that the third signal is the signal in the first signal.

[0188] In some embodiments of the present application, when the third signal includes the signal in the second signal that overlaps with the TRS, the signal in the second signal that overlaps with the TRS includes the reserved signal part in the second signal. It can be understood that the reserved signal in the second signal overlaps with the TRS at least partially.

[0189] In some embodiments of the present application, when the third signal includes the signal in the TRS that overlaps with the second signal, the signal in the TRS that overlaps with the second signal includes the reserved signal part in the TRS. It can be understood that the reserved signals in the second signal and the TRS overlap at least partially.

[0190] It should be noted that the above-mentioned "reserved signal part" can be understood as: the signal is 0, or empty, or the signal part that is not occupied.

[0191] In some embodiments of the present application, the determination of the above-mentioned third signal can be configured by the network-side device or agreed by the protocol.

[0192] In some embodiments of the present application, after the terminal performs the first operation on the third signal, the terminal can perform time-frequency tracking based on the first signal after performing the first operation.

[0193] It can be seen that since before the terminal performs time-frequency tracking based on the first signal, the terminal can first perform at least one of the operations of discarding, puncturing, and rate matching on the third signal in the first signal (that is, at least one of the signal in the second signal that overlaps with the TRS and the signal in the TRS that overlaps with the second signal), therefore, the signal overhead for time-frequency tracking can be reduced, and it is also beneficial to reduce the complexity of the terminal for time-frequency tracking.

[0194] Next, taking the first operation including discarding as an example, a specific solution for the terminal to perform the first operation on the third signal will be exemplified.

[0195] Example 4: The first operation is discarding, and the third signal is the signal in the second signal that overlaps with the TRS.

[0196] Case 8, such as Figure 11As shown in the figure, assume that a TRS includes TRS1 and TRS2, where TRS1 and TRS2 belong to the same TRS resource or resource set. The second signal (e.g., SSB) includes synchronization signal 1, broadcast channel 1, synchronization signal 2, and broadcast channel 2, and TRS1 overlaps with synchronization signal 1, and TRS2 overlaps with synchronization signal 2, where broadcast channel 1 and broadcast channel 2 can also be understood as two parts of the same broadcast signal. In this way, the terminal can directly discard synchronization signal 1 and synchronization signal 2.

[0197] It should be noted that Figure 11 in the figure, synchronization signal 1 and synchronization signal 2 are indicated by dashed boxes.

[0198] Case nine, as Figure 12 shown in the figure, assume that a TRS includes TRS1 and TRS2, where TRS1 and TRS2 belong to the same TRS resource or resource set. The second signal (e.g., SSB) includes synchronization signal 1, broadcast channel 1, synchronization signal 2, and broadcast channel 2, and TRS1 overlaps with synchronization signal 1, where broadcast channel 1 and broadcast channel 2 can also be understood as two parts of the same broadcast signal. In this way, the terminal can directly discard synchronization signal 1.

[0199] It should be noted that Figure 12 in the figure, synchronization signal 1 is indicated by a dashed box.

[0200] It can be understood that it is beneficial to reduce the overhead of SSB while ensuring the time-frequency estimation performance as much as possible.

[0201] Example five: The first operation is to discard, and the third signal is the signal in the TRS that overlaps with the second signal.

[0202] Case ten, as Figure 13 shown in the figure, assume that a TRS includes TRS1 and TRS2, where TRS1 and TRS2 belong to the same TRS resource or resource set. The second signal (e.g., SSB) includes synchronization signal 1, broadcast channel 1, synchronization signal 2, and broadcast channel 2, and a part of the signal of TRS1 overlaps with synchronization signal 1, and a part of the signal of TRS2 overlaps with synchronization signal 2, where broadcast channel 1 and broadcast channel 2 can also be understood as two parts of the same broadcast signal. In this way, the terminal can directly discard the part of the signal in the TRS where TRS1 overlaps with synchronization signal 1 and the part of the signal in the TRS where TRS2 overlaps with synchronization signal 2.

[0203] Case eleven, as Figure 14As shown, assume that a TRS includes TRS1 and TRS2, where TRS1 and TRS2 belong to the same TRS resource or resource set. The second signal (such as SSB) includes synchronization signal 1, broadcast channel 1, synchronization signal 2, and broadcast channel 2, and part of the signal of TRS1 overlaps with synchronization signal 1, where broadcast channel 1 and broadcast channel 2 can also be understood as two parts of the same broadcast signal. In this way, the terminal can directly discard the part of the signal in the TRS that overlaps with synchronization signal 1 in TRS1.

[0204] It can be understood that this can help reduce the overhead of the TRS while ensuring the time-frequency estimation performance as much as possible.

[0205] In some embodiments of the present application, at least one of the following is satisfied between the second signal and the TRS:

[0206] The bandwidth of the second signal is within the bandwidth of the TRS;

[0207] The bandwidth of the TRS is within the bandwidth of the second signal;

[0208] The time-domain resources occupied by the second signal and the time-domain resources occupied by the TRS overlap;

[0209] The time-domain resources occupied by the synchronization signal in the second signal and the time-domain resources occupied by the TRS overlap;

[0210] The time-domain resources occupied by the DMRS of the broadcast channel in the second signal and the time-domain resources occupied by the TRS overlap.

[0211] Optionally, when at least part of the second signal and the TRS overlap, at least one of the following is satisfied between the second signal and the TRS: the bandwidth of the second signal is within the bandwidth of the TRS; the bandwidth of the TRS is within the bandwidth of the second signal; the time-domain resources occupied by the second signal and the time-domain resources occupied by the TRS overlap; the time-domain resources occupied by the synchronization signal in the second signal and the time-domain resources occupied by the TRS overlap; the time-domain resources occupied by the DMRS of the broadcast channel in the second signal and the time-domain resources occupied by the TRS overlap.

[0212] Optionally, when the bandwidth of the second signal is within the bandwidth of the TRS and the bandwidth of the TRS is within the bandwidth of the second signal, it can be understood that the bandwidth of the second signal is the same as the bandwidth of the TRS.

[0213] Optionally, when the time-domain resources occupied by the second signal and the time-domain resources occupied by the TRS overlap, the time-domain resources occupied by the second signal and the time-domain resources occupied by the TRS can completely overlap, that is, the time-domain resources occupied by the second signal are the same as the time-domain resources occupied by the TRS.

[0214] It can be seen that since the embodiments of the present application stipulate the conditions that need to be satisfied between the second signal and the TRS in the case of at least partial overlap between the second signal and the TRS, when the terminal determines that the second signal and the TRS are at least partially overlapped, it can accurately perform time-frequency tracking according to the above conditions. Therefore, the performance of the terminal in performing time-frequency tracking can be improved.

[0215] In some embodiments of the present application, the sequence of the above TRS satisfies at least one of the following:

[0216] The type of the sequence of the TRS is the same as the type of the sequence of the synchronization signal in the second signal;

[0217] The starting position of the generation of the sequence of the TRS is the same as the starting position of the generation of the sequence of the synchronization signal in the second signal;

[0218] The type of the sequence of the TRS is determined based on whether the TRS is multiplexed with the second signal;

[0219] The initialization of the sequence of the TRS is related to the first identifier, and the first identifier is determined based on the second signal;

[0220] The initialization of the sequence of the TRS is related to the second identifier configured or indicated by the network-side device.

[0221] Optionally, in the case where the sequence of the TRS satisfies that the type of the sequence of the TRS is the same as the type of the sequence of the synchronization signal in the second signal, the sequence of the TRS and the sequence of the synchronization signal in the second signal can both be m-sequence, or ZC (Zadoff-Chu) sequence, or gold sequence, or computer-generated sequence (CGS).

[0222] Optionally, in the case where the sequence of the TRS satisfies that the starting position of the generation of the sequence of the TRS is the same as the starting position of the generation of the sequence of the synchronization signal in the second signal, the sequence of the TRS and the sequence of the synchronization signal in the second signal can both start generating from the common RB#0 or pointA.

[0223] It can be understood that the same starting position of the generation of the sequence of the TRS and the starting position of the generation of the sequence of the synchronization signal in the second signal can ensure the continuity after the overlap of the second signal and the TRS.

[0224] Optionally, in the case where the sequence of the TRS satisfies that the type of the sequence of the TRS is determined based on whether the TRS is multiplexed with the second signal, it can be understood that if the TRS is multiplexed with the second signal, the type of the sequence of the TRS can be one type, and if the TRS is not multiplexed with the second signal, the type of the sequence of the TRS can be another type.

[0225] It should be noted that regarding whether the TRS is multiplexed with the second signal and the specific multiplexing method, reference can be made to the specific descriptions in the above embodiments, and the embodiments of this application will not elaborate herein.

[0226] Optionally, the above first identifier may specifically be a cell ID. Among them, the cell ID may include at least one of the following: the physical cell ID of the physical cell ID

[0227] Optionally, the above second identifier may include at least one of the following: an ID configured or indicated by a network-side device. Among them, the ID may be related to at least one of the following: PBCH, Master Information Block (MIB), layer 1 payload, DMRS, and the synchronization signal in the second signal. Among them, being related to DMRS includes being related to the sequence of DMRS; being related to the synchronization signal in the second signal includes being related to the PSS and / or SSS of the SSB.

[0228] As can be seen, since the conditions that the sequence of the TRS in the embodiments of this application needs to meet are specified, the terminal can accurately perform time-frequency tracking based on the above conditions. Therefore, the performance of the terminal for time-frequency tracking can be improved.

[0229] In some embodiments of this application, there is at least one of the following association relationships between the above second signal and the TRS:

[0230] There is an association relationship between the quasi-co-located (QCL) reference relationship of the second signal and the TRS;

[0231] There is an association relationship between the transmission power of the second signal and the transmission power of the TRS;

[0232] There is an association relationship between the transmission period of the second signal and the transmission period of the TRS.

[0233] Optionally, the above QCL reference relationship may include at least one of the following: beam relationship, spatial relationship.

[0234] Exemplarily, in the case where the second signal and the TRS are time-division multiplexed, there is an association relationship between the QCL reference relationship of the second signal and the TRS. For example, the QCL references of the second signal and the TRS are the same, or the QCL reference of the TRS is the second signal, or the QCL reference of the second signal is the TRS.

[0235] Optionally, when there is a correlation between the transmission power of the second signal and the transmission power of the TRS, the transmission power of the second signal and the transmission power of the TRS may be the same, or the transmission powers of both are less than a certain threshold, or the difference between the transmission powers of both is less than a certain threshold.

[0236] Optionally, when there is a correlation between the transmission period of the second signal and the transmission period of the TRS, the transmission period of the second signal and the transmission period of the TRS may be the same, or there may be a multiple relationship.

[0237] It can be seen that since the embodiments of the present application stipulate the correlation between the second signal and the TRS, the terminal can accurately receive the second signal and the TRS according to this correlation, improving the performance of time-frequency synchronization.

[0238] In some embodiments of the present application, when the terminal is in the RRC connected state or the non-connected state, the terminal can receive the first signal from the network-side device.

[0239] Step 102: The terminal performs time-frequency tracking based on the first signal.

[0240] In some embodiments of the present application, the terminal can perform measurements based on the first signal and perform time-frequency tracking according to the measurement results.

[0241] The embodiments of the present application provide a time-frequency tracking method. The terminal can receive a first signal including a second signal and a TRS from the network-side device and perform time-frequency tracking based on the first signal. Since the terminal can perform time-frequency tracking based on the second signal and the TRS, rather than only based on the TRS, on the one hand, the network-side device can use fewer TRS resources to send the TRS to the terminal, thereby reducing the resource overhead of the TRS; on the other hand, through the joint measurement of the second signal and the TRS, the performance of time-frequency tracking can also be further improved, thereby improving the transmission performance of the network.

[0242] For the time-frequency tracking method provided by the embodiments of the present application, the execution subject may be a time-frequency tracking device, or a network-side device, or a functional module or entity in the network-side device. In the embodiments of the present application, the time-frequency tracking method is taken as an example of being executed by the network-side device to illustrate the time-frequency tracking method provided by the embodiments of the present application.

[0243] Figure 15 The flowchart of a time-frequency tracking method provided by the embodiments of the present application is shown. As Figure 15 shown, the time-frequency tracking method provided by the embodiments of the present application may include the following step 301.

[0244] Step 401: The network-side device sends a first signal to the terminal.

[0245] In the embodiments of the present application, the above first signal includes a second signal and a TRS, and the first signal is used for time-frequency tracking.

[0246] In some embodiments of the present application, the manner in which the above second signal and the TRS are multiplexed includes one of the following:

[0247] The second signal and the TRS are time-division multiplexed;

[0248] The second signal and the TRS are frequency-division multiplexed;

[0249] The second signal and the TRS at least partially overlap.

[0250] It can be seen that since the embodiments of the present application specify different ways of multiplexing the second signal and the TRS, the network-side device can send the second signal and the TRS in accordance with the specified different ways, so that the terminal can perform time-frequency tracking in corresponding different ways according to the different ways of multiplexing the second signal and the TRS, rather than using a default way for time-frequency tracking. Therefore, the flexibility of the terminal for time-frequency tracking can be improved.

[0251] In some embodiments of the present application, the time-division multiplexing of the above second signal and the TRS includes at least one of the following modes:

[0252] The first mode. In the first mode, the last first time unit occupied by the second signal is the Pth first time unit before the first first time unit occupied by the TRS, where P≥0;

[0253] The second mode. In the second mode, the last first time unit occupied by the TRS is the Qth first time unit before the first first time unit occupied by the second signal, where Q≥0;

[0254] The third mode. In the third mode, the first first time unit occupied by the second signal is the Sth first time unit after the first first time unit occupied by the TRS, and the last first time unit occupied by the second signal is the Tth first time unit before the last first time unit occupied by the TRS, where S≥0 and T≥0.

[0255] It can be seen that since the embodiments of the present application specify different modes of time-division multiplexing of the second signal and the TRS, the network-side device can send the second signal and the TRS in accordance with the specified different modes, so that the terminal can perform time-frequency tracking in a targeted manner in corresponding different ways according to the characteristics of the different modes of time-division multiplexing of the second signal and the TRS, rather than using a default way for time-frequency tracking. Therefore, the performance of the terminal for time-frequency tracking can be improved.

[0256] In some embodiments of the present application, when the second signal and the TRS are time-division multiplexed, at least one of the following is satisfied between the second signal and the TRS:

[0257] The bandwidth of the second signal is within the bandwidth of the TRS;

[0258] The second signal and the TRS are within the same second time unit;

[0259] The second signal and the TRS are separated by X second time units in the time domain, where X≥1.

[0260] It can be seen that since the embodiments of the present application stipulate the conditions required to be satisfied between the second signal and the TRS when they are time-division multiplexed, the network-side device can send the second signal and the TRS to the terminal according to the above conditions, so that when the terminal determines that the second signal and the TRS are time-division multiplexed, it can accurately perform time-frequency tracking according to the above conditions. Therefore, the performance of the terminal in time-frequency tracking can be improved.

[0261] In some embodiments of the present application, the above-mentioned frequency-division multiplexing of the second signal and the TRS includes at least one of the following modes:

[0262] The fourth mode, in which the bandwidth of the second signal is adjacent to the bandwidth of the TRS;

[0263] The fifth mode, in which the second signal and the TRS are separated by Y first frequency units in the frequency domain, where Y≥1;

[0264] The sixth mode, in which the bandwidth of the second signal overlaps with the bandwidth of the TRS, and the second frequency units occupied by the second signal are different from the second frequency units occupied by the TRS.

[0265] It can be seen that since the embodiments of the present application stipulate different modes of frequency-division multiplexing of the second signal and the TRS, the network-side device can send the second signal and the TRS to the terminal according to the specified different modes, so that the terminal can perform time-frequency tracking in a targeted manner using corresponding different methods according to the characteristics of different modes of frequency-division multiplexing of the second signal and the TRS, rather than using a default method for time-frequency tracking. Therefore, the performance of the terminal in time-frequency tracking can be improved.

[0266] In some embodiments of the present application, the above-mentioned bandwidth of the second signal being adjacent to the bandwidth of the TRS includes at least one of the following:

[0267] The bandwidth of the synchronization signal in the second signal is adjacent to the bandwidth of the TRS;

[0268] The bandwidth of the broadcast channel in the second signal is adjacent to the bandwidth of the TRS;

[0269] The bandwidth of the DMRS of the broadcast channel in the second signal is adjacent to the bandwidth of the TRS;

[0270] The maximum bandwidth of all signals in the second signal is adjacent to the bandwidth of the TRS.

[0271] It can be seen that since it is stipulated in the embodiments of the present application that in the case of frequency division multiplexing between the second signal and the TRS, there are various cases where the bandwidth of the second signal is adjacent to the bandwidth of the TRS, the network-side device can send the second signal and the TRS to the terminal according to the specified different modes, so that when the terminal determines that the second signal and the TRS are frequency division multiplexed, it can accurately perform time-frequency tracking based on the above various cases. Therefore, the performance of the terminal for time-frequency tracking can be improved.

[0272] In some embodiments of the present application, at least one of the following is satisfied between the time domain resources occupied by the second signal and the time domain resources occupied by the TRS:

[0273] The first third time unit occupied by the second signal is the same as the first third time unit occupied by the TRS;

[0274] The last third time unit occupied by the second signal is the same as the last third time unit occupied by the TRS;

[0275] The third time unit occupied by the synchronization signal in the second signal is the same as at least part of the third time units occupied by the TRS;

[0276] The third time unit occupied by the DMRS of the broadcast channel in the second signal is the same as at least part of the third time units occupied by the TRS;

[0277] At least part of the third time units occupied by the synchronization signal in the second signal is the same as the third time unit occupied by the TRS;

[0278] At least part of the third time units occupied by the DMRS of the broadcast channel in the second signal is the same as the third time unit occupied by the TRS.

[0279] It can be seen that since the embodiments of the present application stipulate the conditions that need to be satisfied between the time domain resources occupied by the second signal and the time domain resources occupied by the TRS, the network-side device can send the second signal and the TRS to the terminal according to this condition, so that when the terminal determines that the second signal and the TRS are frequency division multiplexed, it can accurately perform time-frequency tracking based on the above conditions. Therefore, the performance of the terminal for time-frequency tracking can be improved.

[0280] In some embodiments of the present application, at least partial overlap between the second signal and the TRS includes at least one of the following modes:

[0281] The seventh mode, in which the synchronization signal and the TRS in the second signal at least partially overlap;

[0282] The eighth mode, in which the broadcast channel and the TRS in the second signal at least partially overlap;

[0283] The ninth mode, in which the broadcast channel DMRS and the TRS in the second signal at least partially overlap.

[0284] It can be seen that since the embodiments of the present application specify different overlapping manners between the second signal and the TRS, the network-side device can send the second signal and the TRS to the terminal according to the specified different overlapping manners, so that the terminal can perform time-frequency tracking in a targeted manner using corresponding different methods according to the characteristics of the different overlapping manners between the second signal and the TRS, rather than using a default method for time-frequency tracking. Therefore, the performance of the terminal for time-frequency tracking can be improved.

[0285] In some embodiments of the present application, the manner in which the second signal and the TRS at least partially overlap is determined by at least one of the following:

[0286] The synchronization signal in the second signal;

[0287] The cell identifier corresponding to the second signal;

[0288] The DMRS of the broadcast channel in the second signal;

[0289] The synchronization grid;

[0290] The index of the second signal;

[0291] The system message;

[0292] The layer 1 payload;

[0293] The random access response message.

[0294] It can be seen that since the embodiments of the present application specify the determination method of the mode in which the second signal and the TRS at least partially overlap, after the network-side device sends the second signal and the TRS to the terminal, the terminal can accurately determine the overlapping manner of the second signal and the TRS according to this determination method.

[0295] In some embodiments of the present application, when the second signal and the TRS at least partially overlap, the time-frequency tracking method provided by the embodiments of the present application may further include step 401 below.

[0296] Step 401: The network-side device does not send the third signal on the time-frequency domain resources where the second signal and the TRS overlap.

[0297] In the embodiments of the present application, the above-mentioned third signal includes at least one of the following: the signal in the second signal that overlaps with the TRS, and the signal in the TRS that overlaps with the second signal.

[0298] It can be seen that since the network-side device can not send the signal in the second signal that overlaps with the TRS in the time-frequency domain resources where the second signal and the TRS overlap, the resource overhead of the second signal of the network-side device can be reduced; and / or, since the network-side device can not send the signal in the TRS that overlaps with the second signal in the time-frequency domain resources where the second signal and the TRS overlap, the resource overhead of the TRS of the network-side device can be reduced. Thus, the resource overhead of the network-side device can be reduced.

[0299] In some embodiments of the present application, at least one of the following is satisfied between the above-mentioned second signal and the TRS:

[0300] The bandwidth of the second signal is within the bandwidth of the TRS;

[0301] The bandwidth of the TRS is within the bandwidth of the second signal;

[0302] The time-domain resources occupied by the second signal and the time-domain resources occupied by the TRS overlap;

[0303] The time-domain resources occupied by the synchronization signal in the second signal and the time-domain resources occupied by the TRS overlap;

[0304] The time-domain resources occupied by the DMRS of the broadcast channel in the second signal and the time-domain resources occupied by the TRS overlap.

[0305] It can be seen that since the conditions that need to be satisfied between the second signal and the TRS are specified in the embodiments of the present application in the case of time-division multiplexing of the second signal and the TRS, the network-side device can send the second signal and the TRS to the terminal according to the specified conditions, so that when the terminal determines that at least part of the second signal and the TRS overlap, it can accurately perform time-frequency tracking according to the above conditions. Therefore, the performance of the terminal for time-frequency tracking can be improved.

[0306] In some embodiments of the present application, at least one of the following is satisfied by the sequence of the above-mentioned TRS:

[0307] The type of the sequence of the TRS is the same as the type of the sequence of the synchronization signal in the second signal;

[0308] The starting position of the generation of the sequence of the TRS is the same as the starting position of the generation of the sequence of the synchronization signal in the second signal;

[0309] The type of the sequence of the TRS is determined based on whether the TRS is multiplexed with the second signal;

[0310] The initialization of the sequence of the TRS is related to the first identifier, and the first identifier is determined based on the second signal;

[0311] The initialization of the sequence of the TRS is related to the second identifier configured or indicated by the network device.

[0312] As can be seen, since the conditions that the sequence of the TRS needs to meet are specified in the embodiments of the present application, after the network device sends the second signal and the TRS to the terminal, the terminal can accurately perform time-frequency tracking according to the above conditions. Therefore, the performance of the terminal for time-frequency tracking can be improved.

[0313] In some embodiments of the present application, there is at least one of the following association relationships between the second signal and the TRS:

[0314] There is an association relationship between the quasi-co-location QCL reference relationship of the second signal and the TRS;

[0315] There is an association relationship between the transmission power of the second signal and the transmission power of the TRS;

[0316] There is an association relationship between the transmission period of the second signal and the transmission period of the TRS.

[0317] As can be seen, since the association relationship between the second signal and the TRS is specified in the embodiments of the present application, after the network device sends the second signal and the TRS to the terminal, the terminal can accurately receive the second signal and the TRS according to the association relationship.

[0318] The embodiments of the present application provide a time-frequency tracking method. The network device can send a first signal including a second signal and a TRS to the terminal, where the first signal is used for time-frequency tracking. Since the network device can send the second signal and the TRS to the terminal so that the terminal can perform time-frequency tracking based on the second signal and the TRS, rather than only sending the TRS to the terminal, on the one hand, the network device can use fewer TRS resources to send the TRS to the terminal, thereby reducing the resource overhead of the TRS; on the other hand, through the joint measurement of the second signal and the TRS, the performance of time-frequency tracking can also be further improved, thereby improving the transmission performance of the network.

[0319] Each of the above method embodiments, or various possible implementation manners in each method embodiment, can be executed alone, or any two or more of them can be combined with each other. Specifically, it can be determined according to actual usage requirements, and the embodiments of the present application do not limit this.

[0320] For the time-frequency tracking method provided by the embodiments of the present application, the execution subject can be a time-frequency tracking device. In the embodiments of the present application, taking the time-frequency tracking device executing the time-frequency tracking method as an example, the time-frequency tracking device provided by the embodiments of the present application is described.

[0321] Figure 16 shows a possible structural schematic diagram of the time-frequency tracking device involved in the embodiments of the present application. As Figure 16 shown, the time-frequency tracking device 50 may include: a receiving module 51, configured to receive a first signal from a network-side device, where the first signal includes a second signal and a TRS. A tracking module 52, configured to perform time-frequency tracking based on the first signal received by the receiving module 51.

[0322] The embodiments of the present application provide a time-frequency tracking device. Since the time-frequency tracking device can perform time-frequency tracking based on the second signal and the TRS, rather than only based on the TRS, on the one hand, the network-side device can use fewer TRS resources to send the TRS to the time-frequency tracking device, thereby reducing the resource overhead of the TRS; on the other hand, through the joint measurement of the second signal and the TRS, the performance of time-frequency tracking can be further improved, thereby improving the transmission performance of the network.

[0323] In a possible implementation manner, the multiplexing manner of the above-mentioned second signal and the TRS includes one of the following: time division multiplexing of the second signal and the TRS; frequency division multiplexing of the second signal and the TRS; at least partial overlap of the second signal and the TRS.

[0324] In a possible implementation manner, the time division multiplexing of the above-mentioned second signal and the TRS includes at least one of the following modes: a first mode, in the first mode, the last first time unit occupied by the second signal is the Pth first time unit before the first first time unit occupied by the TRS, P≥0; a second mode, in the second mode, the last first time unit occupied by the TRS is the Qth first time unit before the first first time unit occupied by the second signal, Q≥0; a third mode, in the third mode, the first first time unit occupied by the second signal is the Sth first time unit after the first first time unit occupied by the TRS, and the last first time unit occupied by the second signal is the Tth first time unit before the last first time unit occupied by the TRS, S≥0, T≥0.

[0325] In a possible implementation manner, when the second signal and the TRS are time division multiplexed, at least one of the following is satisfied between the second signal and the TRS: the bandwidth of the second signal is within the bandwidth of the TRS; the second signal and the TRS are within the same second time unit; the second signal and the TRS are separated by X second time units in the time domain, X≥1.

[0326] In a possible implementation, the above-mentioned second signal and the TRS are frequency-division multiplexed, including at least one of the following modes: a fourth mode, in which the bandwidth of the second signal is adjacent to the bandwidth of the TRS; a fifth mode, in which the second signal and the TRS are separated by Y first frequency-domain units in the frequency domain, where Y≥1; a sixth mode, in which the bandwidth of the second signal overlaps with the bandwidth of the TRS, and the second frequency-domain units occupied by the second signal are different from the second frequency-domain units occupied by the TRS.

[0327] In a possible implementation, the bandwidth of the above-mentioned second signal is adjacent to the bandwidth of the TRS, including at least one of the following: the bandwidth of the synchronization signal in the second signal is adjacent to the bandwidth of the TRS; the bandwidth of the broadcast channel in the second signal is adjacent to the bandwidth of the TRS; the bandwidth of the DMRS of the broadcast channel in the second signal is adjacent to the bandwidth of the TRS; the maximum bandwidth of all signals in the second signal is adjacent to the bandwidth of the TRS.

[0328] In a possible implementation, at least one of the following is satisfied between the time-domain resources occupied by the above-mentioned second signal and the time-domain resources occupied by the TRS: the first third time unit occupied by the second signal is the same as the first third time unit occupied by the TRS; the last third time unit occupied by the second signal is the same as the last third time unit occupied by the TRS; the third time unit occupied by the synchronization signal in the second signal is the same as at least part of the third time units occupied by the TRS; the third time unit occupied by the DMRS of the broadcast channel in the second signal is the same as at least part of the third time units occupied by the TRS; at least part of the third time units occupied by the synchronization signal in the second signal is the same as the third time unit occupied by the TRS; at least part of the third time units occupied by the DMRS of the broadcast channel in the second signal is the same as the third time unit occupied by the TRS.

[0329] In a possible implementation, the above-mentioned second signal and the TRS at least partially overlap, including at least one of the following modes: a seventh mode, in which the synchronization signal in the second signal and the TRS at least partially overlap; an eighth mode, in which the broadcast channel in the second signal and the TRS at least partially overlap; a ninth mode, in which the broadcast channel DMRS in the second signal and the TRS at least partially overlap.

[0330] In a possible implementation, the mode in which the above-mentioned second signal and the TRS at least partially overlap is determined by at least one of the following: the synchronization signal in the second signal; the cell identifier corresponding to the second signal; the DMRS of the broadcast channel in the second signal; the synchronization grid; the index of the second signal; the system message; the layer 1 payload; the random access response message.

[0331] In a possible implementation, when the second signal and the TRS at least partially overlap, the time-frequency tracking device 50 provided by the embodiments of the present application may further include: a processing module, configured to perform a first operation on a third signal. The third signal includes at least one of the following: a signal in the second signal that overlaps with the TRS, a signal in the TRS that overlaps with the second signal; the first operation includes one of the following: discarding, puncturing, rate matching.

[0332] In a possible implementation, at least one of the following is satisfied between the second signal and the TRS: the bandwidth of the second signal is within the bandwidth of the TRS; the bandwidth of the TRS is within the bandwidth of the second signal; the time-domain resources occupied by the second signal and the time-domain resources occupied by the TRS overlap; the time-domain resources occupied by the synchronization signal in the second signal and the time-domain resources occupied by the TRS overlap; the time-domain resources occupied by the DMRS of the broadcast channel in the second signal and the time-domain resources occupied by the TRS overlap.

[0333] In a possible implementation, the sequence of the TRS satisfies at least one of the following: the type of the sequence of the TRS is the same as the type of the sequence of the synchronization signal in the second signal; the starting position of the generation of the sequence of the TRS is the same as the starting position of the generation of the sequence of the synchronization signal in the second signal; the type of the sequence of the TRS is determined based on whether the TRS is multiplexed with the second signal; the initialization of the sequence of the TRS is related to a first identifier, and the first identifier is determined based on the second signal; the initialization of the sequence of the TRS is related to a second identifier configured or indicated by the network-side device.

[0334] In a possible implementation, at least one of the following association relationships exists between the second signal and the TRS: there is an association relationship between the QCL reference relationship of the second signal and the TRS; there is an association relationship between the transmission power of the second signal and the transmission power of the TRS; there is an association relationship between the transmission period of the second signal and the transmission period of the TRS.

[0335] In a possible implementation, the time-frequency tracking device 50 provided by the embodiments of the present application may further include: a processing module, configured to determine at least one of the following through first information: whether the second signal and the TRS are multiplexed; the multiplexing method of the second signal and the TRS. The first information is information configured by the network-side device for the time-frequency tracking device 50 or information agreed upon by the protocol.

[0336] The time-frequency tracking device 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 other devices other than terminals. Exemplarily, the terminal may include, but is not limited to, the types of the above-listed terminal 11, and other devices may be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0337] The time-frequency tracking device provided in the embodiments of the present application can implement Figures 2 to 14 each process implemented by the method embodiments and achieve the same technical effects. To avoid repetition, details are not described herein again.

[0338] Figure 17 shows a possible structural schematic diagram of the time-frequency tracking device involved in the embodiments of the present application. As Figure 17 shown, the time-frequency tracking device 60 may include: a sending module 61, configured to send a first signal to a terminal, where the first signal includes a second signal and a TRS, and the first signal is used for time-frequency tracking.

[0339] The embodiments of the present application provide a time-frequency tracking device. Since the time-frequency tracking device can send a second signal and a TRS to a terminal so that the terminal can perform time-frequency tracking based on the second signal and the TRS, rather than only sending the TRS to the terminal. Therefore, on the one hand, the time-frequency tracking device can use fewer TRS resources to send the TRS to the terminal, thereby reducing the resource overhead of the TRS; on the other hand, through the joint measurement of the second signal and the TRS, the performance of time-frequency tracking can be further improved, thereby improving the transmission performance of the network.

[0340] In a possible implementation manner, the multiplexing manner of the above second signal and the TRS includes one of the following: time division multiplexing of the second signal and the TRS; frequency division multiplexing of the second signal and the TRS; at least partial overlap of the second signal and the TRS.

[0341] In a possible implementation, the above-mentioned second signal and the TRS are time-division multiplexed, including at least one of the following modes: First mode, in the first mode, the last first time unit occupied by the second signal is the P-th first time unit before the first first time unit occupied by the TRS, where P ≥ 0; Second mode, in the second mode, the last first time unit occupied by the TRS is the Q-th first time unit before the first first time unit occupied by the second signal, where Q ≥ 0; Third mode, in the third mode, the first first time unit occupied by the second signal is the S-th first time unit after the first first time unit occupied by the TRS, and the last first time unit occupied by the second signal is the T-th first time unit before the last first time unit occupied by the TRS, where S ≥ 0 and T ≥ 0.

[0342] In a possible implementation, when the second signal and the TRS are time-division multiplexed, at least one of the following is satisfied between the second signal and the TRS: the bandwidth of the second signal is within the bandwidth of the TRS; the second signal and the TRS are within the same second time unit; the second signal and the TRS are separated by X second time units in the time domain, where X ≥ 1.

[0343] In a possible implementation, the above-mentioned second signal and the TRS are frequency-division multiplexed, including at least one of the following modes: Fourth mode, in the fourth mode, the bandwidth of the second signal and the bandwidth of the TRS are adjacent; Fifth mode, in the fifth mode, the second signal and the TRS are separated by Y first frequency units in the frequency domain, where Y ≥ 1; Sixth mode, in the sixth mode, the bandwidth of the second signal and the bandwidth of the TRS overlap, and the second frequency units occupied by the second signal and the second frequency units occupied by the TRS are different.

[0344] In a possible implementation, the bandwidth of the above-mentioned second signal and the bandwidth of the TRS are adjacent, including at least one of the following: the bandwidth of the synchronization signal in the second signal and the bandwidth of the TRS are adjacent; the bandwidth of the broadcast channel in the second signal and the bandwidth of the TRS are adjacent; the bandwidth of the DMRS of the broadcast channel in the second signal and the bandwidth of the TRS are adjacent; the maximum bandwidth of all signals in the second signal and the bandwidth of the TRS are adjacent.

[0345] In a possible implementation, at least one of the following is satisfied between the time-domain resources occupied by the second signal and the time-domain resources occupied by the TRS: the first third time unit occupied by the second signal is the same as the first third time unit occupied by the TRS; the last third time unit occupied by the second signal is the same as the last third time unit occupied by the TRS; the third time units occupied by the synchronization signal in the second signal are the same as at least some of the third time units occupied by the TRS; the third time units occupied by the DMRS of the broadcast channel in the second signal are the same as at least some of the third time units occupied by the TRS; at least some of the third time units occupied by the synchronization signal in the second signal are the same as the third time units occupied by the TRS; at least some of the third time units occupied by the DMRS of the broadcast channel in the second signal are the same as the third time units occupied by the TRS.

[0346] In a possible implementation, at least partial overlap exists between the second signal and the TRS, including at least one of the following modes: the seventh mode, in which at least partial overlap exists between the synchronization signal in the second signal and the TRS; the eighth mode, in which at least partial overlap exists between the broadcast channel in the second signal and the TRS; the ninth mode, in which at least partial overlap exists between the broadcast channel DMRS in the second signal and the TRS.

[0347] In a possible implementation, the mode of at least partial overlap between the second signal and the TRS is determined by at least one of the following: the synchronization signal in the second signal; the cell identifier corresponding to the second signal; the DMRS of the broadcast channel in the second signal; the synchronization grid; the index of the second signal; the system message; the layer 1 payload; the random access response message.

[0348] In a possible implementation, when at least partial overlap exists between the second signal and the TRS, the sending module 61 is further configured not to send a third signal on the time-frequency domain resources where the second signal and the TRS overlap. The third signal includes at least one of the following: the signal in the second signal that overlaps with the TRS, the signal in the TRS that overlaps with the second signal.

[0349] In a possible implementation, at least one of the following is satisfied between the second signal and the TRS: the bandwidth of the second signal is within the bandwidth of the TRS; the bandwidth of the TRS is within the bandwidth of the second signal; the time-domain resources occupied by the second signal and the time-domain resources occupied by the TRS overlap; the time-domain resources occupied by the synchronization signal in the second signal and the time-domain resources occupied by the TRS overlap; the time-domain resources occupied by the DMRS of the broadcast channel in the second signal and the time-domain resources occupied by the TRS overlap.

[0350] In a possible implementation, the sequence of the above-mentioned TRS satisfies at least one of the following: the type of the sequence of the TRS is the same as the type of the sequence of the synchronization signal in the second signal; the starting position where the sequence of the TRS is generated is the same as the starting position where the sequence of the synchronization signal in the second signal is generated; the type of the sequence of the TRS is determined based on whether the TRS is multiplexed with the second signal; the initialization of the sequence of the TRS is related to a first identifier, and the first identifier is determined based on the second signal; the initialization of the sequence of the TRS is related to a second identifier configured or indicated by the time-frequency tracking device 60.

[0351] In a possible implementation, there is at least one of the following association relationships between the above-mentioned second signal and the TRS: there is an association relationship between the QCL reference relationship of the second signal and the TRS; there is an association relationship between the transmission power of the second signal and the transmission power of the TRS; there is an association relationship between the transmission period of the second signal and the transmission period of the TRS.

[0352] In a possible implementation, whether the above-mentioned second signal and the TRS are multiplexed, and / or, the way in which the second signal and the TRS are multiplexed, is determined by first information. Wherein, the above-mentioned first information is information configured by the time-frequency tracking device 60 for the terminal, or information agreed upon by the protocol.

[0353] The time-frequency tracking device 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 network-side device, or other devices other than network-side devices. Exemplarily, the terminal may include, but is not limited to, the types of the above-mentioned network-side device 12, and other devices may be a server, a Network Attached Storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0354] The time-frequency tracking device provided by the embodiments of the present application can implement Figure 15 each process implemented by the method embodiments, and achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0355] In some embodiments of the present application, as Figure 18 shown, the embodiments of the present application further provide a communication device 70, including a processor 71 and a memory 72. A program or instruction that can run on the processor 71 is stored on the memory 72. For example, when the communication device 70 is a terminal, when the program or instruction is executed by the processor 71, it implements each step of the above-mentioned time-frequency tracking method embodiment, and can achieve the same technical effects. When the communication device 70 is a network-side device, when the program or instruction is executed by the processor 71, it implements each step of the above-mentioned time-frequency tracking method embodiment, and can achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0356] The embodiment of the present application further provides a terminal, including a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to run a program or an instruction to implement the steps in the method embodiment as shown in Figure 2 the method embodiment. This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment. Each implementation process and implementation manner of the above method embodiment can be applied to this terminal embodiment, and the same technical effects can be achieved. Specifically, Figure 19 FIG. is a schematic hardware structure diagram of a terminal according to an embodiment of the present application.

[0357] The terminal 800 includes, but is not limited to, at least some components such as a radio frequency unit 801, a network module 802, an audio output unit 803, an input unit 804, a sensor 805, a display unit 806, a user input unit 807, an interface unit 808, a memory 809, and a processor 810.

[0358] Those skilled in the art can understand that the terminal 800 may further include a power supply (such as a battery) for supplying power to each component. The power supply can be logically connected to the processor 810 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 19 The terminal structure shown in does not limit the terminal. The terminal may include more or fewer components than shown in the figure, or combine some components, or have different component arrangements, which will not be elaborated here.

[0359] It should be understood that in the embodiment of the present application, the input unit 804 may include a graphics processing unit (GPU) 8041 and a microphone 8042. The graphics processor 8041 processes the image data of a static picture or a video obtained by an image capturing device (such as a camera) in a video capture mode or an image capture mode. The display unit 806 may include a display panel 8061, and the display panel 8061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 807 includes at least one of a touch panel 8071 and other input devices 8072. The touch panel 8071 is also called a touch screen. The touch panel 8071 may include two parts: a touch detection device and a touch controller. The other input devices 8072 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.

[0360] In an embodiment of the present application, after the radio frequency unit 801 receives downlink data from a network-side device, it can transmit the data to the processor 810 for processing. Additionally, the radio frequency unit 801 can send uplink data to the network-side device. Generally, the radio frequency unit 801 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0361] The memory 809 can be used to store software programs or instructions and various data. The memory 809 mainly includes a first storage area for storing programs or instructions and a second storage area for storing data. Among them, the first storage area can store an operating system, applications or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 809 can include volatile memory or non-volatile memory. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable ROM (PROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), a static RAM (SRAM), a dynamic RAM (DRAM), a synchronous DRAM (SDRAM), a double data rate SDRAM (DDR SDRAM), an enhanced SDRAM (ESDRAM), a synch link DRAM (SLDRAM), and a direct rambus RAM (DRRAM). The memory 809 in the embodiment of the present application includes, but is not limited to, these and any other suitable types of memory.

[0362] The processor 810 can include one or more processing units. Optionally, the processor 810 integrates an application processor and a modem processor. Among them, the application processor mainly processes operations related to the operating system, user interface, and applications, etc., and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above modem processor may not be integrated into the processor 810.

[0363] Among them, the radio frequency unit 801 is used to receive a first signal from a network-side device, and the first signal includes a second signal and a TRS.

[0364] A processor 810 for performing time-frequency tracking based on a first signal.

[0365] An embodiment of the present application provides a terminal. Since the terminal can perform time-frequency tracking based on a second signal and a TRS, rather than only based on the TRS, on the one hand, the network-side device can use fewer TRS resources to send the TRS to the terminal, thereby reducing the resource overhead of the TRS; on the other hand, through the joint measurement of the second signal and the TRS, the performance of time-frequency tracking can also be further improved, thereby improving the transmission performance of the network.

[0366] In some embodiments of the present application, when at least part of the second signal overlaps with the TRS, the processor 810 is further configured to perform a first operation on a third signal.

[0367] Wherein, the above-mentioned third signal includes at least one of the following: the signal in the second signal that overlaps with the TRS, the signal in the TRS that overlaps with the second signal; the above-mentioned first operation includes one of the following: discarding, puncturing, rate matching.

[0368] In some embodiments of the present application, the processor 810 is further configured to determine at least one of the following through first information:

[0369] Whether the second signal and the TRS are multiplexed;

[0370] The multiplexing method of the second signal and the TRS.

[0371] Wherein, the above-mentioned first information is information configured by the network-side device for the terminal or information agreed upon by the protocol.

[0372] It can be understood that the implementation processes of the implementation manners mentioned in this embodiment can refer to the relevant descriptions of the method embodiments and achieve the same or corresponding technical effects. To avoid repetition, they will not be elaborated here.

[0373] An embodiment of the present application further 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 an instruction to implement the steps of the method embodiment as Figure 15 shown. This embodiment of the network-side device corresponds to the above-mentioned method embodiment of the network-side device. Each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this embodiment of the network-side device and can achieve the same technical effect.

[0374] Specifically, an embodiment of the present application further provides a network-side device. As Figure 20As shown in the figure, the network - side device 900 includes: an antenna 901, a radio - frequency device 902, a base - band device 903, a processor 904, and a memory 905. The antenna 901 is connected to the radio - frequency device 902. In the uplink direction, the radio - frequency device 902 receives information through the antenna 901 and sends the received information to the base - band device 903 for processing. In the downlink direction, the base - band device 903 processes the information to be sent and sends it to the radio - frequency device 902. After processing the received information, the radio - frequency device 902 sends it out through the antenna 901.

[0375] In the above embodiments, the method executed by the network - side device can be implemented in the base - band device 903, and the base - band device 903 includes a base - band processor.

[0376] The base - band device 903 may include, for example, at least one base - band board, and a plurality of chips are arranged on the base - band board, such as Figure 20 As shown, one of the chips is, for example, a base - band processor, which is connected to the memory 905 through a bus interface to call the program in the memory 905 and execute the operations of the network device shown in the above method embodiments.

[0377] The network - side device may further include a network interface 906, and the interface is, for example, a Common Public Radio Interface (CPRI).

[0378] Specifically, the network - side device 900 in the embodiments of the present application further includes: instructions or programs stored on the memory 905 and executable on the processor 904. The processor 904 calls the instructions or programs in the memory 905 to execute Figure 17 the methods executed by the modules shown in the figure and achieve the same technical effects. To avoid repetition, they are not described herein again.

[0379] The embodiments of the present application further provide a readable storage medium. Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, each process of the above - mentioned time - frequency tracking method embodiments is implemented, and the same technical effects can be achieved. To avoid repetition, they are not described here again.

[0380] Among them, the processor is the processor in the terminal described in the above embodiments. The readable storage medium includes computer - readable storage media, such as computer read - only memory ROM, random - access memory RAM, magnetic disks, or optical discs, etc. In some examples, the readable storage medium may be a non - transient readable storage medium.

[0381] Another embodiment of the present application provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is configured to run programs or instructions to implement each process of the above-mentioned embodiment of the time-frequency tracking method, and can achieve the same technical effects. To avoid repetition, details are not described herein again.

[0382] 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.

[0383] Another embodiment of the present application provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement each process of the above-mentioned embodiment of the time-frequency tracking method, and can achieve the same technical effects. To avoid repetition, details are not described herein again.

[0384] The embodiments of the present application further provide a time-frequency tracking system, including: a terminal and a network-side device. The terminal can be used to execute the steps of the corresponding time-frequency tracking method on the terminal side as described above, and the network-side device can be used to execute the steps of the corresponding time-frequency tracking method on the network-side device side as described above.

[0385] It should be noted that in this article, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element 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, and may also include performing functions in a substantially simultaneous manner or in a 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. In addition, the features described with reference to certain examples may be combined in other examples.

[0386] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, they can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disc, etc.) and includes several instructions for causing a terminal or a network-side device to execute the methods described in various embodiments of the present application.

[0387] 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 rather than restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms of embodiments without departing from the purpose of the present application and the scope protected by the claims. All these embodiments fall within the protection scope of the present application.

Claims

1. A time-frequency tracking method, characterized in that including: The terminal receives a first signal from a network-side device, and the first signal includes a second signal and a Tracking Reference Signal (TRS); The terminal performs time-frequency tracking based on the first signal.

2. The method according to claim 1, characterized in that, The multiplexing method of the second signal and the TRS includes one of the following: The second signal and the TRS are multiplexed in time division; The second signal and the TRS are multiplexed in frequency division; The second signal and the TRS at least partially overlap.

3. The method according to claim 2, wherein The second signal and the TRS are multiplexed in time division, including at least one of the following modes: The first mode, in which the last first time unit occupied by the second signal is the P-th first time unit before the first first time unit occupied by the TRS, where P≥0; The second mode, in which the last first time unit occupied by the TRS is the Q-th first time unit before the first first time unit occupied by the second signal, where Q≥0; The third mode, in which the first first time unit occupied by the second signal is the S-th first time unit after the first first time unit occupied by the TRS, and the last first time unit occupied by the second signal is the T-th first time unit before the last first time unit occupied by the TRS, where S≥0 and T≥0.

4. The method according to claim 2 or 3, characterized in that, When the second signal and the TRS are multiplexed in time division, at least one of the following is satisfied between the second signal and the TRS: The bandwidth of the second signal is within the bandwidth of the TRS; The second signal and the TRS are within the same second time unit; The second signal and the TRS are separated by X second time units in the time domain, where X≥1.

5. The method according to claim 2, wherein The second signal and the TRS are multiplexed in frequency division, including at least one of the following modes: The fourth mode, in which the bandwidth of the second signal is adjacent to the bandwidth of the TRS; The fifth mode, in which the second signal and the TRS are separated by Y first frequency units in the frequency domain, where Y≥1; The sixth mode, in which the bandwidth of the second signal overlaps with the bandwidth of the TRS, and the second frequency unit occupied by the second signal is different from the second frequency unit occupied by the TRS.

6. The method according to claim 5, characterized in that, The bandwidth of the second signal is adjacent to the bandwidth of the TRS, including at least one of the following: The bandwidth of the synchronization signal in the second signal is adjacent to the bandwidth of the TRS; The bandwidth of the broadcast channel in the second signal is adjacent to the bandwidth of the TRS; The bandwidth of the DMRS of the broadcast channel in the second signal is adjacent to the bandwidth of the TRS; The maximum bandwidth of all signals in the second signal is adjacent to the bandwidth of the TRS.

7. The method according to claim 5 or 6, characterized in that, At least one of the following is satisfied between the time-domain resources occupied by the second signal and the time-domain resources occupied by the TRS: The first third time unit occupied by the second signal is the same as the first third time unit occupied by the TRS; The last third time unit occupied by the second signal is the same as the last third time unit occupied by the TRS; The third time units occupied by the synchronization signal in the second signal are the same as at least some of the third time units occupied by the TRS; The third time units occupied by the DMRS of the broadcast channel in the second signal are the same as at least some of the third time units occupied by the TRS; At least some of the third time units occupied by the synchronization signal in the second signal are the same as the third time units occupied by the TRS; At least some of the third time units occupied by the DMRS of the broadcast channel in the second signal are the same as the third time units occupied by the TRS.

8. The method according to claim 2, wherein The second signal and the TRS at least partially overlap, including at least one of the following modes: The seventh mode, in which the synchronization signal in the second signal and the TRS at least partially overlap; The eighth mode, in which the broadcast channel in the second signal and the TRS at least partially overlap; The ninth mode, in which the broadcast channel DMRS in the second signal and the TRS at least partially overlap.

9. The method according to claim 8, wherein The mode in which the second signal and the TRS at least partially overlap is determined by at least one of the following: The synchronization signal in the second signal; The cell identifier corresponding to the second signal; The DMRS of the broadcast channel in the second signal; The synchronization grid; The index of the second signal; The system message; The layer 1 payload; The random access response message.

10. The method according to claim 8 or 9, characterized in that, In the case where the second signal and the TRS at least partially overlap, the method further includes: The terminal performs a first operation on the third signal; Wherein, the third signal includes at least one of the following: the signal in the second signal that overlaps with the TRS, the signal in the TRS that overlaps with the second signal; the first operation includes one of the following: discarding, puncturing, rate matching.

11. The method according to any one of claims 2, 8 to 10, characterized in that, At least one of the following is satisfied between the second signal and the TRS: The bandwidth of the second signal is within the bandwidth of the TRS; The bandwidth of the TRS is within the bandwidth of the second signal; The time domain resources occupied by the second signal and the time domain resources occupied by the TRS overlap; The time domain resources occupied by the synchronization signal in the second signal and the time domain resources occupied by the TRS overlap; The time domain resources occupied by the DMRS of the broadcast channel in the second signal and the time domain resources occupied by the TRS overlap.

12. The method according to any one of claims 2 to 11, characterized in that, The sequence of the TRS satisfies at least one of the following: The type of the sequence of the TRS is the same as the type of the sequence of the synchronization signal in the second signal; The starting position of the generation of the sequence of the TRS is the same as the starting position of the generation of the sequence of the synchronization signal in the second signal; The type of the sequence of the TRS is determined based on whether the TRS is multiplexed with the second signal; The initialization of the sequence of the TRS is related to a first identifier, and the first identifier is determined based on the second signal; The initialization of the sequence of the TRS is related to a second identifier configured or indicated by the network side device.

13. The method according to any one of claims 2 to 12, characterized in that, There is at least one of the following association relationships between the second signal and the TRS: There is an association relationship between the quasi - co - location QCL reference relationship of the second signal and the TRS; There is an association relationship between the transmission power of the second signal and the transmission power of the TRS; There is an association relationship between the transmission period of the second signal and the transmission period of the TRS.

14. The method according to claim 2, wherein The method further includes: The terminal determines at least one of the following through the first information: Whether the second signal and the TRS are multiplexed; The multiplexing method of the second signal and the TRS; Wherein, the first information is the information configured by the network - side device for the terminal or the information agreed upon by the protocol.

15. A time-frequency tracking device, characterized in that, The time - frequency tracking device includes: A receiving module, configured to receive a first signal from a network - side device, where the first signal includes a second signal and a TRS; A tracking module, configured to perform time - frequency tracking based on the first signal received by the receiving module.

16. A time-frequency synchronization method, characterized in that, It includes: The network - side device sends a first signal to the terminal, where the first signal includes a second signal and a TRS, and the first signal is used for time - frequency tracking.

17. The method according to claim 16, characterized in that, The multiplexing method of the second signal and the TRS includes one of the following: The second signal and the TRS are time - division multiplexed; The second signal and the TRS are frequency - division multiplexed; The second signal and the TRS at least partially overlap.

18. The method according to claim 17, wherein The time - division multiplexing of the second signal and the TRS includes at least one of the following modes: The first mode, in which the last first - time unit occupied by the second signal is the P - th first - time unit before the first first - time unit occupied by the TRS, P≥0; The second mode, in which the last first - time unit occupied by the TRS is the Q - th first - time unit before the first first - time unit occupied by the second signal, Q≥0; The third mode, in which the first first - time unit occupied by the second signal is the S - th first - time unit after the first first - time unit occupied by the TRS, and the last first - time unit occupied by the second signal is the T - th first - time unit before the last first - time unit occupied by the TRS, S≥0, T≥0.

19. The method according to claim 17 or 18, characterized in that, In the case of time - division multiplexing of the second signal and the TRS, at least one of the following is satisfied between the second signal and the TRS: The bandwidth of the second signal is within the bandwidth of the TRS; The second signal and the TRS are within the same second - time unit; The second signal and the TRS are separated by X second - time units in the time domain, X≥1.

20. The method according to claim 17, wherein The frequency - division multiplexing of the second signal and the TRS includes at least one of the following modes: The fourth mode, in which the bandwidth of the second signal is adjacent to the bandwidth of the TRS; The fifth mode, in which the second signal and the TRS are separated by Y first - frequency units in the frequency domain, Y≥1; Sixth mode, in which the bandwidth of the second signal overlaps with the bandwidth of the TRS, and the second frequency domain units occupied by the second signal are different from the second frequency domain units occupied by the TRS.

21. The method according to claim 20, wherein The bandwidth of the second signal and the bandwidth of the TRS are adjacent, including at least one of the following: The bandwidth of the synchronization signal in the second signal is adjacent to the bandwidth of the TRS; The bandwidth of the broadcast channel in the second signal is adjacent to the bandwidth of the TRS; The bandwidth of the DMRS of the broadcast channel in the second signal is adjacent to the bandwidth of the TRS; The maximum bandwidth of all signals in the second signal is adjacent to the bandwidth of the TRS.

22. The method according to claim 20 or 21, characterized in that, At least one of the following is satisfied between the time domain resources occupied by the second signal and the time domain resources occupied by the TRS: The first third time unit occupied by the second signal is the same as the first such third time unit occupied by the TRS; The last third time unit occupied by the second signal is the same as the last such third time unit occupied by the TRS; The third time unit occupied by the synchronization signal in the second signal is the same as at least part of the third time unit occupied by the TRS; The third time unit occupied by the DMRS of the broadcast channel in the second signal is the same as at least part of the third time unit occupied by the TRS; At least part of the third time unit occupied by the synchronization signal in the second signal is the same as the third time unit occupied by the TRS; At least part of the third time unit occupied by the DMRS of the broadcast channel in the second signal is the same as the third time unit occupied by the TRS.

23. The method according to claim 17, wherein The second signal and the TRS at least partially overlap, including at least one of the following modes: Seventh mode, in which the synchronization signal in the second signal and the TRS at least partially overlap; Eighth mode, in which the broadcast channel in the second signal and the TRS at least partially overlap; Ninth mode, in which the broadcast channel DMRS in the second signal and the TRS at least partially overlap.

24. The method according to claim 23, wherein The manner in which the second signal and the TRS at least partially overlap is determined by at least one of the following: The synchronization signal in the second signal; The cell identifier corresponding to the second signal; The DMRS of the broadcast channel in the second signal; Synchronization grid; The index of the second signal; System message; Layer 1 payload; Random access response message.

25. The method according to any one of claims 17 to 24, characterized in that, In the case where the second signal and the TRS at least partially overlap, the method further includes: The network side device does not send a third signal on the time-frequency domain resources where the second signal and the TRS overlap; Wherein, the third signal includes at least one of the following: the signal in the second signal that overlaps with the TRS, the signal in the TRS that overlaps with the second signal.

26. The method according to any one of claims 17, 23 to 25, characterized in that, At least one of the following is satisfied between the second signal and the TRS: The bandwidth of the second signal is within the bandwidth of the TRS; The bandwidth of the TRS is within the bandwidth of the second signal; The time-domain resources occupied by the second signal overlap with the time-domain resources occupied by the TRS; The time-domain resources occupied by the synchronization signal in the second signal overlap with the time-domain resources occupied by the TRS; The time-domain resources occupied by the DMRS of the broadcast channel in the second signal overlap with the time-domain resources occupied by the TRS.

27. The method according to any one of claims 17 to 26, characterized in that, The sequence of the TRS satisfies at least one of the following: The type of the sequence of the TRS is the same as the type of the sequence of the synchronization signal in the second signal; The starting position of the generation of the sequence of the TRS is the same as the starting position of the generation of the sequence of the synchronization signal in the second signal; The type of the sequence of the TRS is determined based on whether the TRS is multiplexed with the second signal; The initialization of the sequence of the TRS is related to a first identifier, and the first identifier is determined based on the second signal; The initialization of the sequence of the TRS is related to a second identifier configured or indicated by the network-side device.

28. The method according to any one of claims 17 to 27, characterized in that, There is at least one of the following association relationships between the second signal and the TRS: There is an association relationship between the quasi-co-location QCL reference relationship of the second signal and the TRS; There is an association relationship between the transmission power of the second signal and the transmission power of the TRS; There is an association relationship between the transmission period of the second signal and the transmission period of the TRS.

29. The method according to claim 17, wherein Whether the second signal and the TRS are multiplexed, and / or, the multiplexing manner of the second signal and the TRS, is determined by first information; Wherein, the first information is information configured by the network-side device for the terminal, or information agreed upon by the protocol.

30. A time-frequency tracking device, characterized in that, The time-frequency tracking device includes: A sending module, configured to send a first signal to a terminal, where the first signal includes a second signal and a TRS, and the first signal is used for time-frequency tracking.

31. A terminal, characterized in that, It includes a processor and a memory, where the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, it implements the steps of the time-frequency tracking method according to any one of claims 1 to 14.

32. A network-side device, characterized in that, It includes a processor and a memory, where the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, it implements the steps of the time-frequency tracking method according to any one of claims 16 to 29.

33. A readable storage medium, characterized in that, The program or instruction is stored on the readable storage medium, and when the program or instruction is executed by the processor, it implements the time-frequency tracking method according to any one of claims 1 to 14, or implements the steps of the time-frequency tracking method according to any one of claims 16 to 29.

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