Signal transmission method and apparatus, terminal, and network side device

Abstract

The present application belongs to the technical field of communications. Disclosed are a signal transmission method and apparatus, a terminal, and a network side device. The signal transmission method in the embodiments of the present application comprises: a terminal acquiring search window information associated with a target reference signal (RS); and the terminal measuring the target RS of a first cell on the basis of the search window information, wherein the target RS is used for at least one of mobility management, time-frequency tracking, channel sounding, information demodulation, positioning, sensing, synchronization, and phase tracking.

Description

Signal transmission method and device, terminal and network side equipment

[0001] Cross-reference to Related Applications

[0002] The present application claims priority to Chinese Patent Application No. 202410991450.5, filed on July 23, 2024, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0003] The present application belongs to the field of communication technology, and specifically relates to a signal transmission method, device, terminal and network side equipment. BACKGROUND

[0004] With the development of communication systems, there are various signal measurements in the communication system. Currently, the measurement of signals for mobility management, time-frequency tracking, channel sounding, information demodulation, positioning, sensing, synchronization and phase tracking usually needs to take the measurement of a synchronization signal block (SSB) as a reference. However, in the case where the network side equipment is not configured with SSB or the SSB is relatively sparse, how to perform signal measurement becomes a problem to be solved. SUMMARY

[0005] Embodiments of the present application provide a signal transmission method, device, terminal and network side equipment, which can solve the problem of how to perform signal measurement in the case where the network side equipment is not configured with SSB.

[0006] In a first aspect, a signal transmission method is provided, comprising:

[0007] The terminal acquires search window information associated with a target reference signal (RS);

[0008] The terminal measures the target RS of the first cell based on the search window information;

[0009] The target RS is used for at least one of mobility management, time-frequency tracking, channel sounding, information demodulation, positioning, sensing, synchronization and phase tracking.

[0010] In a second aspect, a signal transmission method is provided, comprising:

[0011] The network side equipment sends search window information associated with a target reference signal (RS) to a terminal, the search window information being used to measure the target RS of the first cell;

[0012] The target RS is used for at least one of mobility management, time-frequency tracking, channel sounding, information demodulation, positioning, sensing, synchronization and phase tracking.

[0013] In a third aspect, a signal transmission apparatus is provided, comprising:

[0014] a receiving module configured to obtain search window information associated with a target reference signal (RS), and measure the target RS of a first cell based on the search window information.

[0015] The target RS is used for at least one of mobility management, time-frequency tracking, channel sounding, information demodulation, positioning, sensing, synchronization, and phase tracking.

[0016] In a fourth aspect, a signal transmission apparatus is provided, comprising:

[0017] a receiving module configured to obtain search window information associated with a target reference signal (RS), and measure the target RS of a first cell based on the search window information.

[0018] The target RS is used for at least one of mobility management, time-frequency tracking, channel sounding, information demodulation, positioning, sensing, synchronization, and phase tracking.

[0019] In a fifth aspect, a signal transmission apparatus is provided, which is configured to perform the steps of the method according to the first aspect, or implement the steps of the method according to the second aspect.

[0020] In a sixth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores programs or instructions executable on the processor, and the programs or instructions, when executed by the processor, implement the steps of the method according to the first aspect.

[0021] In a seventh aspect, a terminal is provided, comprising a processor and a communication interface, wherein the communication interface is configured to obtain search window information associated with a target reference signal (RS), and measure the target RS of a first cell based on the search window information.

[0022] The target RS is used for at least one of mobility management, time-frequency tracking, channel sounding, information demodulation, positioning, sensing, synchronization, and phase tracking.

[0023] In an eighth aspect, a network-side device is provided, comprising a processor and a memory, wherein the memory stores programs or instructions executable on the processor, and the programs or instructions, when executed by the processor, implement the steps of the method according to the second aspect.

[0024] In a ninth aspect, a network-side device is provided, comprising a processor and a communication interface, wherein the communication interface is configured to send search window information associated with a target reference signal (RS) to a terminal, and the search window information is used to measure the target RS of a first cell.

[0025] The target RS is used for at least one of mobility management, time-frequency tracking, channel detection, information demodulation, positioning, sensing, synchronization and phase tracking.

[0026] In a tenth aspect, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect, or implement the steps of the method described in the second aspect.

[0027] Eleventhly, a wireless communication system is provided, comprising: a terminal and a network-side device, wherein the terminal can be used to perform the steps of the method as described in the first aspect, and the network-side device can be used to perform the steps of the method as described in the second aspect.

[0028] In a twelfth aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being configured to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

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

[0030] In this embodiment, a search window information associated with a target reference signal (RS) is acquired by a terminal; the terminal measures the target RS of a first cell based on the search window information; wherein the target RS is used for at least one of mobility management, time-frequency tracking, channel detection, information demodulation, positioning, sensing, synchronization, and phase tracking. Thus, because the target RS is measured based on the search window information associated with it, measurement of the target RS is achieved even when the network-side equipment has no configured SSB or the SSBs are sparse. Simultaneously, since no associated SSB is required as a reference for the target RS, the measurement time for the target RS is reduced. Attached Figure Description

[0031] Figure 1 is a block diagram of a wireless communication system applicable to an embodiment of this application;

[0032] Figure 2 is a schematic flowchart of a signal transmission method provided in an embodiment of this application;

[0033] Figures 2a to 2d are example diagrams of target RS mapping patterns in the signal transmission method provided in the embodiments of this application;

[0034] Figure 3 is one of the example diagrams of the transmission scenario in the signal transmission method provided in the embodiments of this application;

[0035] FIG. 4 is an example of a transmission scenario in a signal transmission method according to an embodiment of the present application;

[0036] FIG. 5a is an example of a transmission scenario in a signal transmission method according to an embodiment of the present application;

[0037] FIG. 5b is an example of a transmission scenario in a signal transmission method according to an embodiment of the present application;

[0038] FIG. 6 is an example of a transmission scenario in a signal transmission method according to an embodiment of the present application;

[0039] FIG. 7 is an example of a transmission scenario in a signal transmission method according to an embodiment of the present application;

[0040] FIGS. 8a to 8j are examples of target RS mapping patterns in a signal transmission method according to an embodiment of the present application;

[0041] FIGS. 9a and 9b are examples of target RS mapping patterns in a signal transmission method according to an embodiment of the present application;

[0042] FIG. 9c is an example of distribution of target RS on different symbols in a signal transmission method according to an embodiment of the present application;

[0043] FIG. 10 is a flow chart of another signal transmission method according to an embodiment of the present application;

[0044] FIG. 11 is a structure diagram of a signal transmission apparatus according to an embodiment of the present application;

[0045] FIG. 12 is a structure diagram of another signal transmission apparatus according to an embodiment of the present application;

[0046] FIG. 13 is a structure diagram of a communication device according to an embodiment of the present application;

[0047] FIG. 14 is a structure diagram of a terminal according to an embodiment of the present application;

[0048] FIG. 15 is a structure diagram of a network side device according to an embodiment of the present application. DETAILED DESCRIPTION

[0049] The terms "first," "second," etc., used 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 used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, the first object can be one or more. Furthermore, "or" in this application indicates at least one of the connected objects. For example, the scope of protection for "A or B" covers at least three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. In addition, the terms "A and / or B," "at least one of A and B," and "at least one of A or B" also cover at least the above three scenarios. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

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

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

[0052] ​FIG. 1 shows a block 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. The terminal 11 can be a terminal-side device such as a mobile phone, a Tablet Personal Computer, a Laptop Computer, a notebook computer, a Personal Digital Assistant (PDA), a palmtop computer, a netbook, an Ultra-mobile Personal Computer (UMPC), a Mobile Internet Device (MID), an Augmented Reality (AR) device, a Virtual Reality (VR) device, a robot, a wearable device, a flight vehicle, a Vehicle User Equipment (VUE), a shipboard device, a Pedestrian User Equipment (PUE), a smart home (a home device with a wireless communication function such as a refrigerator, a television, a washing machine, or furniture), a game console, a Personal Computer (PC), a kiosk, or a self-service machine. The wearable device includes a smart watch, a smart bracelet, a smart earphone, smart glasses, smart jewelry (a smart bracelet, a smart necklace, a smart ring, a smart necklace, a smart anklet, a smart necklace, etc.), a smart wristband, smart clothes, etc. The vehicle-mounted device can also be referred to as a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip, or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application. The network-side device 12 can include an access network device or a core network device. 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.The base station can be referred to as a Node B (NB), an evolved Node B (eNB), a next generation Node B (gNB), a New Radio Node B (NR Node B), an access point, a relay station (RBS), a serving base station (SBS), a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a home Node B (HNB), a home evolved Node B, a transmit / receive point (TRP), or some other suitable terminology in the art, and is not limited to a particular technical terminology, provided that the same technical effect is achieved. 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.

[0053] The core network device can also be referred to as a core network node, a core network function, or a core network network element, etc., which includes but is not limited to at least one of the following: a mobility management entity (MME), an access and mobility management function (AMF), a session management function (SMF), a user plane function (UPF), a policy control function (PCF), a policy and charging rules function (PCRF), an edge application server discovery function (EASDF), a unified data management (UDM), a unified data repository (UDR), a home subscriber server (HSS), a centralized network configuration (CNC), a network repository function (NRF), a network exposure function (NEF), a local NEF (L-NEF), a binding support function (BSF), an application function (AF), a location management function (LMF), a gateway mobile location center (GMLC), a network data analytics function (NWDAF), etc. It should be noted that only the core network device in the NR system is taken as an example for introduction in the embodiments of the present application, and the specific type of the core network device is not limited. If the name of the core network device mentioned in the embodiments of the present application changes in the subsequent protocol version (for example, 6G), it is also within the protection scope of the present application.

[0054] Optionally, the core network device can be implemented by one or more function modules in one device, or can be implemented by multiple devices together, and the embodiments of the present application do not make a specific limitation hereon. It can be understood that the above function modules can be network elements in a hardware device, can be software function modules running on a dedicated hardware, or can be virtualized function modules instantiated on a platform (for example, a cloud platform).

[0055] For the convenience of understanding, some contents related to the embodiments of the present application are described as follows:

[0056] I. Mobility management measurement.

[0057] For a wireless communication system, accurate measurement of cell quality and beam quality is the basis for effective implementation of wireless resource management and mobility management. For 5G NR, currently two main categories of reference signals are considered as measurement reference signals, which are SSB and channel state reference signal (CSI-RS).

[0058] For SSB-based measurement, the base station configures the measurement resource of SSB to the terminal through high-layer signaling, so that the terminal performs corresponding measurement operation.

[0059] For CSI-RS-based measurement, the base station can configure one or more CSI-RS resources for the terminal to make measurement through high-layer signaling. First, in terms of cell, high-layer signaling can give cell-level CSI-RS configuration parameters, such as cell identification (ID), cell measurement bandwidth and resource density, etc. In addition, since each cell can configure multiple CSI-RS resources, further parameter configuration also contains configuration information at the level of each CSI-RS resource, such as CSI-RS index, time domain and frequency domain location information occupied by the CSI-RS resource, sequence information, etc., which is basically the same as the CSI-RS configuration method in multiple input multiple output (MIMO). Such CSI-RS is also called CSI-RS for mobility.

[0060] Synchronization information of CSI-RS for mobility and quasi co-location (QCL) relationship.

[0061] Associated SSB (associatedSSB) is used to indicate the SSB from which the timing is acquired when performing CSI-RS measurement. This parameter further includes two sub-parameters: SSB-Index and isQuasiColocated. This parameter set is configured per resource, and can also be not configured.

[0062] Optionally, if associatedSSB is not configured, the following cases are included:

[0063] If refServCellIndex is configured, the terminal acquires timing based on the cell indicated by this parameter, and performs measurement. This parameter is configured per cell or per cell of resources;

[0064] If refServCellIndex is not configured, the terminal performs CSI-RS measurement based on the timing of the current primary cell (Pcell);

[0065] In the case of no associatedSSB, R16 has no RAN4 requirement.

[0066] If associatedSSB is configured, the following cases are included:

[0067] The terminal acquires timing based on the SSB corresponding to SSB-Index, and performs CSI-RS measurement based on this timing. This SSB is the SSB in the cell indicated by the cellId parameter corresponding to the CSI-RS. If this SSB cannot be detected, the terminal does not need to perform CSI-RS measurement.

[0068] The terminal considers that the CSI-RS and this SSB should be QCL-D. For the case that is not QCL-D relationship, i.e. isQuasiColocated is false, there is currently no RAN4 requirement.

[0069] In a frequency division duplexing (FDD) scenario, if the periodicity of CSI-RS is greater than 10 ms, the time difference between any two cells with the same refFreqCSI-RS, i.e., the same point A, on the same band should not exceed 153600Ts, i.e., 5 slots.

[0070] For frequency range (FR) 1, on each resource of each monitoring occasion (MO), the associated SSB is configurable.

[0071] For FR2, on each MO, either all resources have associated SSB or none of them have.

[0072] II. Pattern of positioning reference signals (PRS)

[0073] The pattern of PRS is determined according to the number of combs and the number of symbols. According to the number of combs and the number of symbols configured by the network, combined with the relative resource element (RE) offset table agreed in the protocol, the pattern of PRS can be determined.

[0074] It should be noted that when the number of PRS symbols is greater than the number of PRS combs, the number of PRS symbols is an integer multiple of the number of combs, and a repeated PRS pattern will be generated, so that there are symbols with the same RE position in the PRS pattern. For example, taking the number of combs as 4 and the number of symbols as 4, the corresponding relative RE offset is {0, 2, 1, 3}; and taking the number of combs as 4 and the number of symbols as 12, the corresponding relative RE offset is {0, 2, 1, 3, 0, 2, 1, 3, 0, 2, 1, 3}, which will generate a repeated PRS pattern.

[0075] 5G protocol mainly considers two categories of reference signals for Radio Resource Management (RRM) measurement (or mobility management), which are SSB and CSI-RS. For SSB-based measurement, the base station configures the measurement resource of SSB to the UE through high-layer signaling for the terminal to perform the corresponding measurement operation. For CSI-RS-based measurement, the base station can configure one or more CSI-RS resources for the terminal to measure through high-layer signaling. Before measuring the CSI-RS, if the UE is configured with the SSB associated with the CSI-RS (associated SSB), it needs to detect the SSB associated with the CSI-RS first, determine the target cell through the SSB, then determine the CSI-RS resource location according to the target cell timing information, and finally measure the target CSI-RS to obtain the corresponding measurement result. In addition, if the UE fails to detect the SSB associated with a certain CSI-RS resource, the CSI-RS resource will not be measured. If the information field of the associated SSB is not configured, it means that the UE can directly use the timing of the reference service cell (refServCellIndex) indicated in the measurement configuration to determine the location of the CSI-RS resource, and then directly measure the CSI-RS resource without additional target cell synchronization signal detection work. However, there is no corresponding RAN4 requirement in the case where the associated SSB of the CSI-RS is not configured.

[0076] Since SSB is often available, SSB can be used as a baseline RS for RRM measurement, or SSB can be used as an associated reference signal of CSI-RS to assist accurate measurement of CSI-RS and obtain channel information for mobility management.

[0077] In the 6G stage, considering the power consumption, overhead, and the like of network devices or UEs, the transmission of SSB may not be as common as in 5G. For example, in the connected state, considering that the UE has accessed the network and maintains synchronization, the demand for SSB is low, and the transmission of SSB can be reduced as much as possible (such as less transmission or no transmission of SSB); and in the non-connected state, considering that the UE has a strong access request, the demand for SSB is high (such as more frequent transmission of SSB). Therefore, in the absence of SSB, or when SSB is very sparse, or when the UE is configured with other RS for RRM measurement and there is no SSB as a reference, how the UE measures the non-SSB RS and obtains accurate channel information for mobility management is a current problem. Therefore, the signal transmission method of the present application is proposed.

[0078] The signal transmission method provided by the embodiments of the present application will be described in detail in combination with some embodiments and application scenarios thereof with reference to the accompanying drawings.

[0079] Referring to FIG. 2, the signal transmission method provided by the embodiments of the present application includes the following steps, as shown in FIG. 2:

[0080] In step 201, a terminal acquires search window information associated with a target reference signal (RS).

[0081] In step 202, the terminal measures the target RS of a first cell based on the search window information.

[0082] The target RS is used for at least one of mobility management, time-frequency tracking, channel sounding, information demodulation, positioning, sensing, synchronization, and phase tracking.

[0083] In the embodiments of the present application, the target RS can be understood or replaced as a target RS resource or a target RS resource set, wherein one resource set corresponds to one resource or multiple resources. The above-mentioned first cell can be understood as a node that transmits the target RS, such as a transmission and reception point (TRP) or a transmission point (TP).

[0084] Optionally, the target RS includes but is not limited to at least one of the following: a channel state information reference signal (CSI-RS), a tracking reference signal (TRS), a synchronization signal block (SSB), a positioning reference signal, a sensing reference signal, a phase tracking reference signal, an RS dedicated to mobility management, and a newly designed RS. Optionally, the RS dedicated to mobility management can be understood as an RS other than the SSB.

[0085] Optionally, the above-mentioned first cell is a non-serving cell or a neighboring cell.

[0086] Optionally, in the embodiments of the present application, the state of the terminal is a connected state, an inactive state, or an idle state.

[0087] Optionally, in the embodiments of the present application, the terminal receives a configuration or an indication of a network device, which can be through broadcasting, groupcasting, multicasting, or unicasting of the network device.

[0088] Optionally, in the embodiments of the present application, the target RS can assist the terminal to better or faster complete cell switching, or better or faster achieve data transmission, channel tracking and other functions after cell switching. In one implementation, the terminal measures the target RS, and within a short time after cell switching, or at the time of cell switching or before cell switching, according to the measurement of the target RS, better or faster achieves at least one of the functions of mobility management, time-frequency tracking, channel sounding, information demodulation, positioning, sensing, synchronization and phase tracking.

[0089] Optionally, the search window information can be configured by the network side device for the terminal, and the terminal can determine the search window of the target RS or the timing of the first cell based on the configured search window information, so as to measure the target RS based on the determined search window or the timing of the first cell. It should be understood that the search window information is configured per cell.

[0090] Optionally, in some embodiments, the search window information includes at least one of time search window information and angle search window information.

[0091] The time search window information includes at least one of the following: a center of the time search window, or first information for determining the center of the time search window; a length of the time search window, or second information for determining the length of the time search window.

[0092] The angle search window information includes at least one of the following: a center of the angle search window, or third information for determining the center of the angle search window; an angle range of the angle search window, or fourth information for determining the angle range of the angle search window.

[0093] It should be noted that, since there is no associated SSB as a reference for the RS, the tracking segment cannot accurately determine the timing or spatial direction (or beam) of the target RS and measure the target RS; or, since the SSB period is relatively large, even if there is an associated SSB as a reference, it still needs a long time to determine the timing or spatial beam of the target RS and measure the target RS. Therefore, in order to better or faster determine the timing and time domain position of the target RS, or the spatial direction (or beam), the search window information associated with the target RS can be configured to assist the terminal to search for the target RS, and reduce the search complexity and search time of the terminal. In addition, with the time search window, the UE does not need to detect the associated SSB, and can also reduce the time for measuring the target RS. Otherwise, the terminal needs to detect the associated SSB first when measuring the target RS.

[0094] In the embodiments of the present application, a terminal acquires search window information associated with a target reference signal (RS); and the terminal measures the target RS of a first cell based on the search window information, wherein the target RS is used for at least one of mobility management, time-frequency tracking, channel sounding, information demodulation, positioning, sensing, synchronization and phase tracking. In this way, since the measurement of the target RS is performed based on the search window information associated with the target RS, the measurement of the target RS is realized in the case that the network side device does not configure SSB or SSB is relatively sparse. At the same time, since the associated SSB is not required as a reference of the target RS, the time for measuring the target RS is reduced.

[0095] Optionally, in some embodiments, the first information includes at least one of the following:

[0096] a desired reception time difference between the first cell and a second cell;

[0097] a system frame 0 offset between the first cell and the second cell;

[0098] a subframe offset between the first cell and the second cell;

[0099] a slot offset between the first cell and the second cell;

[0100] a slot position of the target RS;

[0101] wherein the second cell is a serving cell of the terminal, or the terminal has known the reception timing (Rx timing) of a non-serving cell. In other words, the second cell is a cell whose Rx timing is known. In other words, among the at least one first cell and the second cell, the timing of at least one cell is known (or at least one cell is a serving cell).

[0102] Optionally, in the embodiments of the present application, the first information includes cell-level information, such as at least one of a desired reception time difference between the first cell and the second cell, a system frame 0 offset between the first cell and the second cell, a subframe offset between the first cell and the second cell, and a slot offset between the first cell and the second cell. The cell-level information can be configured by a network device.

[0103] Optionally, the number of the first cells associated with the target RS is no less than 1. Optionally, the 'cell level information' can configure at least one group corresponding to at least one first cell. Optionally, the cell information configuration type is per cell (i.e. per cell configuration of the cell level information). Optionally, the second cell and at least one cell in the at least one first cell have known timing (or at least one cell is a serving cell). An embodiment is as follows: the second cell is a non-serving cell, but one cell in the at least one cell is a serving cell. The terminal determines the timing information of the second cell according to at least one of the 'expected receiving time difference between the first cell and the second cell, the system frame 0 offset of the first cell and the second cell, the subframe offset of the first cell and the second cell, and the time slot offset of the first cell and the second cell' between the second cell and the first cell as the serving cell, and further determines the timing information of the other first cells according to the timing information of the second cell.

[0104] Optionally, in the embodiments of the present application, the above-mentioned second cell is also referred to as a'reference cell'. In the embodiments of the present application, the above-mentioned second cell can be a serving cell of the terminal, and the first cell is a non-serving cell (or a neighbor cell); or the second cell can be a serving cell of the terminal, and the second cell can be another serving cell of the terminal, for example, the first cell and the second cell are non-co-located serving cells; or the second cell can be a non-serving cell of the terminal, and there is a serving cell in the at least one first cell.

[0105] Optionally, in some embodiments, if the second cell is a serving cell, the following cases can exist:

[0106] 1. The second cell is a primary serving cell by default, or is a serving cell configured with a target RS, or is a serving cell of the same frequency point as the first cell;

[0107] 2. The second serving cell is indicated by a network side device, for example, the network side device can indicate the second cell through a serving cell index.

[0108] Optionally, the receiving time difference is a difference between the receiving time of the first time unit of the first cell and the start point of the second time unit of the second cell, and the second time unit is the start point of the time unit of the second cell that is closest to the receiving time of the first time unit.

[0109] Optionally, the above-mentioned first time unit and second time unit include but are not limited to at least one of a system frame, a subframe, a time slot, a symbol, etc. In an embodiment, the time unit is a'subframe'.

[0110] In the embodiments of the present application, the reception time difference considers at least one of the expected transmission time delay difference and the transmission time of the first cell and the second cell. Alternatively, the granularity of the reception time difference can be indicated by the network side device or agreed by the protocol. For example, in an embodiment, the granularity is N*Ts, and Ts=1 / (15000*2048); N can be indicated by the network side device or agreed by the protocol.

[0111] Alternatively, in some embodiments, the number of the target RSs is at least two, the at least two target RSs are associated with the at least two first cells, and the at least two first cells are associated with at least two frequency layers.

[0112] Each frequency layer is associated with one second cell, or all the frequency layers are associated with the same second cell.

[0113] In the embodiments of the present application, the network side device can configure multiple target RSs for the terminal, and the multiple target RSs are associated with multiple first cells, and the multiple first cells are associated with at least two frequency layers. At this time, each frequency is associated with or configured with one second cell, or all the frequency layers are associated with the same second cell.

[0114] Alternatively, each frequency layer is associated with the same second cell, that is, the multiple first cells contained in each frequency layer are associated with one second cell. That is, when determining the cell-level information corresponding to the multiple first cells in the first information, the cell-level information such as at least one of the expected reception time difference between the first cell and the second cell, the system frame 0 offset between the first cell and the second cell, the subframe offset between the first cell and the second cell, and the time slot offset between the first cell and the second cell takes the same second cell as the reference.

[0115] Alternatively, all the frequency layers are associated with the same second cell, that is, the multiple first cells contained in all the frequency layers are associated with one second cell. That is, when determining the cell-level information corresponding to the multiple first cells in the first information, the cell-level information such as at least one of the expected reception time difference between the first cell and the second cell, the system frame 0 offset between the first cell and the second cell, the subframe offset between the first cell and the second cell, and the time slot offset between the first cell and the second cell takes the same second cell as the reference.

[0116] Alternatively, the above frequency layer can be replaced by an absolute radio frequency channel number (ARFCN) or a measurement object.

[0117] Optionally, in some embodiments, the System Frame Number (SFN) 0 offset is a time offset of a first time slot (i.e., slot #0) of a system frame 0 of the first cell to a first time slot of a system frame 0 of the second cell.

[0118] Optionally, the SFN 0 offset includes at least one of a SFN offset and a subframe offset within SFN. Optionally, the SFN offset ranges from 0 to 1023; and the subframe offset within SFN ranges from 0 to 9. Optionally, if 10 ms (i.e., SFN length) can be divided by a period of the target RS (e.g., 5 ms, 2 ms, etc.), the SFN 0 offset can include only the subframe offset, but not the SFN offset.

[0119] Optionally, if the first cell and the second cell are intra-frequency cells or the measurement of the target RS is intra-frequency measurement, the SFN 0 offset can be ignored or considered as 0.

[0120] Optionally, in some embodiments, a slot position of the target RS is determined based on a timing of the first cell. That is, a slot configuration of the target RS is determined based on the timing of the first cell. For example, a network device configures a time domain position of the target RS, which includes at least one of a slot offset, a period, etc. The configured time domain position is a time domain position of the first cell.

[0121] Optionally, in some embodiments, a length of the time search window is determined by an expected uncertainty of a relative time difference of reception (Rx) between the first cell and the second cell.

[0122] Optionally, the uncertainty can be understood or replaced by a single-sided uncertainty. That is, the time search window is a search window center position increased and decreased by the uncertainty.

[0123] Optionally, a time granularity of the uncertainty can be indicated by a network device or agreed by a protocol. In one implementation, the granularity is M*Ts, Ts = 1 / (15000*2048); and M can be indicated by the network device or agreed by the protocol.

[0124] Optionally, in some embodiments, the measurement behavior of the target RS includes any one of the following when the received time difference is greater than or equal to a target threshold:

[0125] the terminal does not expect to measure the target RS;

[0126] In the case that the measurement gap is not configured, the terminal does not expect to measure the target RS;

[0127] In the case that the measurement gap is configured, the terminal does not expect to receive the target RS outside the measurement gap.

[0128] Optionally, since the above-mentioned reception time difference is a cell-level reception time difference, the target RS that the terminal does not expect to measure is the target RS corresponding to the first cell.

[0129] In the embodiments of the present application, the above-mentioned target threshold can be determined according to at least one of the following: the capability of the terminal, the indication of the network side device, and the protocol agreement.

[0130] It should be understood that, in the embodiments, the measurement of the target RS by the terminal is intra-frequency measurement or inter-frequency measurement. Optionally, if the target RS is intra-frequency measurement, the UE measures the target RS within the active BWP. Alternatively, if the target RS is inter-frequency measurement, the UE measures the target RS in the measurement gap. Optionally, if the frequency domain range of the target RS does not exceed the active BWP and the subcarrier spacing is consistent with the active BWP, the UE measures the target RS within the active BWP. Alternatively, if the UE expects to measure the target RS outside the active BWP or the subcarrier spacing is different from the active BWP, the UE measures the target RS in the measurement gap. Alternatively, if the UE expects to measure the target RS, the UE measures the target RS in the measurement gap.

[0131] Optionally, in some embodiments, the third information includes at least one of the following:

[0132] the expected angle of arrival between the first cell and the terminal;

[0133] the expected angle of departure between the first cell and the terminal.

[0134] Optionally, in some embodiments, the fourth information includes at least one of the following:

[0135] the expected angle of arrival between the first cell and the terminal;

[0136] the expected angle of departure between the first cell and the terminal.

[0137] It should be understood that, since there is no associated SSB as a target RS reference, the terminal cannot accurately determine the spatial beam information of the target RS. Therefore, in order to better determine the target spatial beam, the angle search window information associated with the target RS can be configured to assist the terminal in searching in the space of the target RS and reduce the search complexity of the terminal.

[0138] Optionally, the above-mentioned angle range includes a first angle range determined based on an angle of arrival and a corresponding uncertainty and a second angle range determined based on an angle of departure and a corresponding uncertainty.

[0139] Optionally, the coordinate system of the expected angle of arrival or angle of departure reference is GCS; or, the coordinate system of the reference is LCS (assuming that the LCS of the terminal is known, the angle in GCS is converted into the angle in LCS).

[0140] Optionally, the granularity of the expected angle of arrival or angle of departure can be indicated by the network side device or agreed by the protocol; the granularity of the uncertainty of the angle can be indicated by the network side device or agreed by the protocol.

[0141] It should be noted that, in the embodiments of the present application, the terminal is not expected to measure the target RS outside the angle search window.

[0142] Optionally, in some embodiments, the terminal measuring the target RS of the first cell based on the search window information includes:

[0143] The terminal determines a time search window based on the search window information;

[0144] The terminal measures the target RS of the first cell based on the time search window.

[0145] In the embodiments of the present application, the terminal determining a time search window based on the search window information can be understood as that the network side device configures a time search window for the terminal. At this time, the measurement behavior of the terminal can be further limited, for example, the method further includes at least one of the following:

[0146] The terminal is not expected to measure or search the target RS outside the time search window;

[0147] In the case that the terminal does not detect the target RS within the time search window, the terminal stops or suspends the measurement or search of the target RS.

[0148] Optionally, stopping or suspending the measurement or search of the target RS can be understood or replaced as: stopping or suspending the measurement of all target RSs of the cell where the target RS is located.

[0149] Optionally, in some embodiments, the terminal measures the target RS based on the timing of the serving cell if the terminal is not configured with the time search window. Alternatively, if the time search window of the target RS is not configured, the UE assumes that the timing of the first cell is consistent with the timing of the second cell.

[0150] In the embodiments of the present application, the terminal not being configured with the time search window can be understood or replaced as the terminal determining the timing of the serving cell based on the search window information, and then measuring the target RS based on the timing of the serving cell. Optionally, the serving cell can be indicated by the network side device or agreed by the protocol (such as the protocol agreeing to be the Pcell).

[0151] Optionally, in some embodiments, the relationship between the time search window of the target RS and the associated SSB of the target RS can include any of the following:

[0152] The terminal does not expect to be configured with the time search window and the associated SSB of the target RS at the same time;

[0153] The time search window and the associated SSB of the target RS are allowed to be configured, and the behavior of the UE further includes any of the following: if the time search window and the associated SSB are configured, the terminal determines the spatial beam information (i.e. QCL-d) of the target RS based on the associated SSB only, and does not determine the timing information of the target RS through the associated SSB; if the time search window and the associated SSB are configured, the terminal determines the timing information of the target RS based on the associated SSB preferentially; if the associated SSB is not detected, the UE determines the timing information of the target RS based on the time search window (or vice versa, i.e. preferentially determines the timing information of the target RS based on the time search window); if the time search window and the associated SSB are configured, the terminal ignores the time search window (or vice versa, i.e. ignores the associated SSB, or ignores the determination of the timing through the associated SSB).

[0154] Optionally, in some embodiments, the method further includes at least one of the following:

[0155] The terminal determines whether the target RS collides with other signals or channels based on the target information;

[0156] The terminal determines the time unit in which the target RS collides with other signals or channels based on the target information;

[0157] The target information includes at least one of the following: a time unit in which the target RS is located, and a time unit affected by a time search window of the target RS.

[0158] Optionally, in determining whether the target RS collides with other signals or channels or in which time units the collision occurs, the terminal considers not only the time length of the target RS itself but also the additional time length caused by the target RS search window.

[0159] In the embodiments of the present application, the time unit can be understood as a symbol or a time slot, which is not further limited here.

[0160] It should be noted that the configuration of the target RS needs to realize the estimation of the channel large-scale parameters (such as the frequency domain large-scale parameters) in channel estimation, and the configuration of the target RS needs to be enhanced accordingly, such as configuring the target RS with multiple symbols and the REs with the same frequency domain position on the multiple symbols.

[0161] Optionally, the first cell includes multiple target RSs (or target RS resources). Different RSs or at least part of the RSs in the multiple target RSs correspond to different beams. The terminal can obtain the beam-level measurement result of the target RS of the first cell according to the measurement of different target RSs of the first cell. Optionally, the time domain range of the multiple target RSs included in the first cell does not exceed a certain time threshold (or is configured within a certain time threshold), such as within one time slot or x ms (such as 5 ms).

[0162] In addition, the first cell in which the target RS is located can be a non-serving cell. Therefore, from the perspective of the transmission of the first cell, the target RS can be part of a TRS or a PRS, without transmitting a special RS; and from the perspective of the terminal, the target RS can be an RS for mobility management, and the target RS is 'part of the CSI-RS, TRS, or PRS transmitted by the first cell', which is transparent to the terminal. However, some characteristics of the target RS need to meet the characteristics of 'TRS or PRS transmitted by the first cell', but the conventional technology cannot meet the characteristics of 'TRS or PRS', so the present application needs to give corresponding enhancement design to the configuration of the target RS. This is described below.

[0163] Optionally, in some embodiments, the method further includes:

[0164] The terminal receives first configuration information from the network side device;

[0165] The first configuration information is used to configure a target identifier associated with the target RS, and the target identifier includes at least one of the following: an RS identifier; a resource identifier of the target RS; and identifier information of the first cell.

[0166] In the embodiments of the present application, the identification information of the first cell can include at least one of the following: a physical cell identifier (PCI), a cell global identifier (CGI), and an ARFCN.

[0167] Optionally, the time-domain mapping pattern of one target RS can include at least two symbols. The target RS resource elements (REs) with the same frequency-domain positions on at least two symbols can be used to estimate frequency-domain large-scale parameters such as frequency offset and doppler spread. In addition, the target RS on multiple symbols can further improve the detection probability and processing gain.

[0168] Optionally, in some embodiments, the target RS is carried by multiple symbols, and the target RS resource elements (REs) with the same frequency-domain positions are on at least two symbols, or the target RS resource elements (REs) with the same frequency-domain positions are on all symbols, or the RE positions on each symbol are the same, or the RE positions on at least two symbols are the same.

[0169] Optionally, the target RS resource elements (REs) with the same frequency-domain positions are on at least x symbols (x≥2, x can be determined by at least one of the following: protocol agreement, network indication, and terminal capability).

[0170] In the embodiments of the present application, the target RS RE can be understood or replaced as the RE of the target RS. For example, the REs of the target RS have the same RE offset on multiple symbols in one RB.

[0171] Optionally, in other embodiments, the target RS can also be carried by one symbol. Optionally, the REs occupied by the target RS on one symbol are consecutive REs or equally spaced REs. In the case where the target RS is carried by multiple symbols, the target RS resource element (RE) densities of different symbols can also be set to be different.

[0172] For example, in some embodiments, at least two RE densities of the target RS can be configured by a network-side device or agreed by a protocol. Optionally, for different frequency density symbols, the network-side device respectively indicates the RE offset of the target RS of each symbol.

[0173] In some embodiments, the REs of the target RS of different symbols satisfy at least one of the following relationships:

[0174] The RE density of the target RS with larger density can be divided by the RE density of the target RS with smaller density.

[0175] The RE frequency domain position of the symbol with larger RE density of the target RS contains the RE frequency domain position on the symbol with smaller RE density of the target RS.

[0176] Optionally, in the case that the target RS is carried by multiple symbols, the multiple symbols can be determined according to at least one of the following:

[0177] The network side device indicates the position of each symbol; for example, the network side device indicates the position of each symbol, and each symbol position is a symbol position relative to the start of the slot; or the first symbol position is, and the symbol positions of the following symbols are relative symbol positions relative to the first symbol; one embodiment: if the target RS is CSI-RS for mobility, the target RS contains two symbols. The first symbol of the target RS is indicated by 'firstOFDMSymbolInTimeDomain', and the second symbol is indicated by 'firstOFDMSymbolInTimeDomain2';

[0178] The network side device indicates the position of the first symbol, and the relative position of the subsequent symbol to the first symbol is agreed by the protocol;

[0179] The network side device indicates the position of the first symbol, and the relative position of the subsequent symbol to the first symbol is agreed by the protocol;

[0180] The network side device indicates the position of the first symbol, and the relative position of the subsequent symbol to the first symbol is related to the frequency domain density of the target RS; for example, one embodiment: if the frequency domain density is comb-X, the interval between the nth symbol and the first symbol is (n-1)*X; or, if the frequency domain density is comb-X, the interval between the nth symbol and the first symbol is (n-1)*X*M, wherein M is a positive integer indicated by the network or agreed by the protocol;

[0181] The position of each symbol is agreed by the protocol

[0182] A plurality of groups of'symbol positions' are agreed by the protocol, and one group is indicated by the network side device.

[0183] Optionally, in the case that the target RS is carried by multiple symbols, the multiple symbols satisfy at least one of the following:

[0184] The symbols are discontinuous;

[0185] The target RS is associated with the same target ID;

[0186] The target RS is associated with the same port.

[0187] Optionally, in some embodiments, when the target RS is carried by multiple symbols, the RE offset of each symbol of the target RS time-frequency mapping pattern is determined according to at least one of the following parameters:

[0188] The frequency domain density of the target RS;

[0189] The number of symbols of the target RS;

[0190] The RE offset of the first symbol of the target RS;

[0191] The relative RE offset of each symbol (or subsequent symbol or at least part of the symbol) of the target RS relative to the first symbol (or the previous symbol).

[0192] All or part of the above parameters can be indicated by the network or agreed by the protocol.

[0193] As shown in FIG. 2a, the frequency domain density of the target RS is comb-4, and the number of symbols is 2. The RE offset of the first symbol of the target RS is 0. The relative RE offset of each symbol of the target RS relative to the first symbol is {0, 2}.

[0194] As shown in FIG. 2b, the frequency domain density of the target RS is comb-4, and the number of symbols is 4. The RE offset of the first symbol of the target RS is 0. The relative RE offset of each symbol of the target RS relative to the first symbol is {0, 2, 1, 3}.

[0195] Optionally, the RE offset of the first symbol of the target RS is in the range of {0, …, comb size-1}.

[0196] Optionally, the RE offset of the first symbol of the target RS can be indicated by the network, or related to the target ID of the target RS or the ID of the first cell associated with the target RS. Further, the RE offset of the first symbol of the target RS is calculated according to the following formula: n_ID mod comb size. Wherein, n_ID is the target ID of the target RS or the ID of the first cell associated with the target RS.

[0197] Optionally, the relative RE offset of each symbol (or subsequent symbol) of the target RS relative to the first symbol (or the previous symbol) can be indicated by the network or agreed by the protocol. For example: when the number of symbols or the frequency domain density of the target RS is determined (such as the number of symbols or the frequency domain density is configured by the network), according to the table agreed by the protocol, the relative RE offset of each symbol can be determined.

[0198] Optionally, for the first symbol, the relative RE offset is 0.

[0199] Optionally, the target RS time-frequency pattern supports repetition of RE offset on different symbols. One embodiment: the repetition is based on the RE offset of the first X symbols; that is, the RE offset on the symbol with symbol index n is equal to the RE offset on the symbol with symbol index = (n mod X) (the symbol index of the first symbol is 0). Optionally, X is indicated by the network or agreed by the protocol. Optionally, X is less than or equal to the comb size; X is less than the number of symbols. Optionally, the terminal can determine the RE offset of each symbol according to the RE offset of the first symbol, the relative RE offset of at least part of the symbols (i.e., the first X symbols) relative to the RE offset of the first symbol, and the repetition of the RE offset.

[0200] As shown in FIG. 2c, the comb size is 4, the number of symbols is 4, and X = 2; as shown in FIG. 2d, the comb size is 4, the number of symbols is 8, and X = 4.

[0201] Optionally, the time-frequency pattern with relative RE offset described above can be a'staggered pattern'. The staggered pattern can increase the time measurement accuracy or transmission power of the target RS. Further, if the target RS supports the pattern of repeated RE offset, according to the repeated RS offset, the frequency domain correlation parameters can be further estimated, and the influence of the frequency domain offset error can be reduced.

[0202] Optionally, in the case where the target RS is carried by multiple symbols, the multiple symbols are continuous, or non-continuous.

[0203] Optionally, in some embodiments, one target RS can be carried by at least two slots.

[0204] In the embodiments of the present application, the design of multiple slots can improve the processing gain, estimate the frequency domain large-scale parameters, and be used for Rx beam sweeping at the receiving end.

[0205] Optionally, in some embodiments, the multiple slots satisfy at least one of the following:

[0206] The time-frequency positions in the multiple slots are repetitions of the time-frequency positions in one slot; or the target RS RE positions of different symbols in the multiple slots are the same; or at least y symbols in the multiple slots have target RS resource particle REs with the same frequency domain positions (y ≥ 2, y can be determined by at least one of the following: protocol agreement, network indication, and terminal capability).

[0207] The plurality of slots are consecutive slots.

[0208] The plurality of slots are associated with a same target RS.

[0209] The plurality of slots are associated with a same port.

[0210] Optionally, in some embodiments, 1 target RS is associated with a frequency domain density determined from a plurality of frequency domain densities.

[0211] In an implementation, the plurality of frequency domain densities are x, x∈{2, 4, 6, 12}, representing intervals of adjacent REs of 1 symbol; or, the plurality of frequency domain densities are y, y∈{6, 3, 2, 1}, representing numbers of REs in 1 RB.

[0212] Further, the RE offset can be represented according to a bitmap, or directly indicated by a network side device. Wherein, a length of the bitmap is equal to an interval of adjacent REs; a bit of ‘1’ in the bitmap represents a RE position.

[0213] Optionally, in some embodiments, a formula of a generation sequence of the target RS is determined based on at least one of: a sequence identification of the target RS and a threshold associated with the sequence identification.

[0214] For example, in some embodiments, if a sequence ID of a target RS is less than or equal to (or less than) a target threshold, a generation formula 1 is adopted; if the sequence ID of the target RS is greater than (or greater than or equal to) the target threshold, a generation formula 2 is adopted.

[0215] For another example, in some embodiments, the generation formula is 1, related to both the target sequence ID and the threshold.

[0216] Optionally, in some embodiments, the method further comprises:

[0217] The terminal receives second configuration information from the network side device;

[0218] Wherein, the second configuration information is used for configuring a period of the target RS, the period of the target RS including a first period in which the target RS is actually transmitted and a second period in which the target RS is not actually transmitted.

[0219] In embodiments of the present application, the network side device configures a target RS period muting pattern through the second configuration information, for determining a period in which the target RS is not actually transmitted.

[0220] For example, the muting pattern has a length of N, each bit represents M consecutive periods, N and M can be indicated by the network side device or agreed by protocol; the muting pattern bit is '1' indicating that the M consecutive periods have target RS transmission, '0' indicating no target RS transmission; the period of muting pattern is N*M periods, and repeats every N*M periods.

[0221] Optionally, the period of muting pattern is not more than 10240ms.

[0222] Optionally, 10240ms can be divided by the period of muting pattern (such as 5120ms, 2560ms, etc.).

[0223] Optionally, in some embodiments, the method further comprises:

[0224] The terminal receives third configuration information from the network side device;

[0225] The third configuration information is used to configure target QCL information associated with the target RS, the source RS in the target QCL information is PRS or another target RS of the first cell; the QCL information includes at least one of the following: QCL information used to determine spatial filter information and QCL information used to determine timing.

[0226] In the embodiments of the present application, if the source RS of the QCL information of the target RS is another target RS in the first cell, the following cases are included:

[0227] The indication of the source RS can be indicated according to the target RS ID;

[0228] If the two target RSs have QCL-D relationship, it means that the two target RSs are transmitted with the same spatial filter. Optionally, the target RSs with the same spatial filter are associated with the same port.

[0229] If the QCL source RS of the target RS is PRS, the following cases are included:

[0230] If the QCL information is the QCL information used to determine timing, the terminal receives the target RS based on the timing of the PRS;

[0231] The PRS and the target RS come from the same cell;

[0232] The QCL information contains PRS identification information, and the PRS identification information contains at least one of TRP identification information, a PRS resource ID, and a PRS resource ID; wherein the TRP identification information contains at least one of a PCI, a CGI, and an ARFCN;

[0233] Optionally, the terminal does not expect (or is not requested) to perform additional measurements on the PRS, i.e., the PRS configuration is obtained and measured in the positioning process;

[0234] Optionally, if the PRS is not detected or not accurately measured, the terminal does not expect to measure the target RS;

[0235] Optionally, if the PRS is not configured, the UE measures the target RS according to the time search window configured by the network.

[0236] Optionally, in some embodiments, in the case where one of the first cells includes at least two target RSs, the method further includes:

[0237] The network-side device sends target indication information to the terminal, and the target indication information is used to indicate that the ports of at least some of the at least two target RSs are the same ports, and the at least some of the at least two target RSs are used for joint channel estimation.

[0238] Optionally, in the embodiments of the present application, the RE frequency domain positions of the at least two target RSs are the same; or the RE frequency domain positions of the at least two target RSs are at least partially the same.

[0239] Optionally, the at least two target RSs are adjacent in the time domain slot; or the interval in the time domain does not exceed a certain threshold.

[0240] Optionally, in one cell, the network-side device configures K target RSs, and the K target RSs correspond to different beams respectively.

[0241] Optionally, for one frequency layer or all target RSs of the first cell, all target RSs need to be configured within N windows. Optionally, the length of each window does not exceed a time threshold. Optionally, the time threshold is x ms (such as x = 5 ms). Optionally, N ≥ 1, and N ≤ M; that is, all PRSs need to be configured in at most 'M' windows. Optionally, for FR2, N = 1; for FR1, N ≥ 1, and N ≤ 2.

[0242] Wherein, one frequency layer can contain a set of first cells. The first cell or target RS in one frequency layer has at least one of the following characteristics:

[0243] the same center frequency point;

[0244] the same reference point A;

[0245] the same bandwidth;

[0246] the same subcarrier spacing;

[0247] the same frequency domain density.

[0248] Optionally, one frequency layer is also called Measurement Object (MO).

[0249] In order to better understand the present application, the following is described by some examples.

[0250] Embodiment one: details of target RS measurement based on time search window.

[0251] In this embodiment, as shown in FIG. 3, according to the time search window, the terminal can determine which subframe start point of the second cell to search for the target RS; further, determine the corresponding SFN index, subframe index and slot index of the target RS to be searched, further determine the generation sequence of the target RS (the generation sequence is related to the slot index); further, search and measure the target RS with the generation sequence of the target RS. Therefore, when decoupled from the associated SSB, the terminal can independently search for the target RS through the time search window.

[0252] Wherein, the expected reception time difference between the first cell and the second cell is denoted as ExpectedRxTimeDifference, and the granularity is r1; the uncertainty of the expected reception time difference is denoted as uncertainty, and the granularity is r2;

[0253] Further, the terminal assumes to receive the target RS in the time search window.

[0254] Wherein, the time search window is [time search window center-uncertainty*r2, time search window center+uncertainty*r2];

[0255] The time search window center is determined according to the following formula: T REF +1ms×N+ExpectedRxTimeDifference×r1;

[0256] Wherein, T REFThe start time of a certain subframe of the second cell at the UE's reception time (specifically, the reception time at the terminal antenna connector); optionally, the certain subframe can be SFN#0 subframe#0, or a subframe in which the target RS is transmitted in the second cell.

[0257] N can be calculated according to the following parameters:

[0258] SFN0 offset of the first cell and the second cell, wherein the SFN0 offset comprises at least one of SFN offset and subframe offset;

[0259] Slot offset of the target RS, wherein the target slot position can be determined according to the period of the target RS and the offset.

[0260] Further, when the target RS collides with other channels or signals, the symbol or slot affected by the target RS is determined according to the following: the symbol or slot of the target RS, and the symbol or slot affected by the time search window of the target RS.

[0261] As shown in FIG. 4, after considering the search window, the time occupied by the target RS is the time occupied by the shaded part. When determining the collision of the target RS with other channels or signals, the time occupied by the target RS is considered to collide with other channels or signals.

[0262] Optionally, due to the terminal processing capability, the UE can buffer the target RS when receiving the target RS. The buffer capability can be divided into two types: slot-level buffer and symbol-level buffer. When determining the collision of the target RS with other signals or channels, the slot or symbol of the target RS buffer can be considered to collide with other signals or channels.

[0263] As shown in FIG. 5a, the buffer capability of the terminal is slot-level buffer, and the terminal buffers all the slots affected by the time occupied by the target RS. The slot is based on the slot of the timing service cell.

[0264] As shown in FIG. 5b, the buffer capability of the terminal is symbol-level buffer, and the terminal buffers all the symbols affected by the time occupied by the target RS. The symbol is based on the symbol of the timing service cell.

[0265] Embodiment two: details of the target RS measurement based on the angle search window.

[0266] In this embodiment, the terminal can determine the angle search range when receiving the target RS according to the angle search window.

[0267] As shown in FIG. 6, the angle search window is expected AoA ± uncertainty. Wherein, 61 is expected AoA, representing expected Angle of Arrival (AoA), and θ is uncertainty, representing uncertainty. The terminal can search the target RS within this angle search window. Alternatively, if the coordinate system of the angle search window is GCS, the UE can transform the coordinates of the angle search window into the angle search window of LCS according to its own coordinate system before searching the target RS.

[0268] As shown in FIG. 7, the angle search window is expected AoD ± uncertainty. Wherein, 71 is expected AoD, representing expected Direction of Arrival (DoA), and θ is uncertainty, representing uncertainty. The terminal can roughly determine the transmission angle of the target RS according to this angle search window. According to the transmission angle of the target RS, the terminal can further roughly determine the angle range for receiving the target RS.

[0269] Embodiment three: the time-frequency mapping pattern of the target RS is composed of at least 2 symbols. Multiple symbols have the same frequency domain position RE. One purpose of this design is to estimate the frequency domain large-scale parameters of the channel, such as frequency offset and doppler spread.

[0270] As shown in FIGS. 8a to 8j, several exemplary time-frequency mapping patterns of the target RS under different frequency domain densities are given. It should be noted that from the perspective of the network side device, the target RS pattern corresponds to the PRS pattern of comb-2, 4, 6, which is equivalent to taking multiple symbols with the same RE position from the PRS pattern to form the target RS. From the perspective of the terminal, the PRS pattern can be transparent to the terminal, and the terminal can only obtain the pattern of the target RS.

[0271] Alternatively, for the target RS in the same Measurement Object, at least one of the frequency domain density, the number of symbols, the bandwidth, the center frequency point and the reference point A of the target RS is the same.

[0272] (1) The density of the target RS is comb-4:

[0273] If the number of symbols is 2, the pattern of target RSs can be shown in FIG. 8a and FIG. 8b. It is equivalent to taking 2 symbols with the same RE location from the PRS pattern of comb-4. The relative symbol interval of 2 symbols is {0, 4} or {0, 8}.

[0274] If the number of symbols is 3, the pattern of target RSs can be shown in FIG. 8c. It is equivalent to taking 3 symbols with the same RE location from the PRS pattern of comb-4. The relative symbol interval of 3 symbols is {0, 4, 8}.

[0275] (2) The density of target RSs is comb-6:

[0276] If the number of symbols is 2, the pattern of target RSs can be shown in FIG. 8d. It is equivalent to taking 2 symbols with the same RE location from the PRS pattern of comb-6. The relative symbol interval of 2 symbols is {0, 6}.

[0277] (3) The density of target RSs is comb-2:

[0278] If the number of symbols is 2, the pattern of target RSs can be shown in FIG. 8e and FIG. 8f. It is equivalent to taking 2 symbols with the same RE location from the PRS pattern of comb-2. The relative symbol interval of 2 symbols can be 2 symbols selected from {0, 2, 4, 6, 8, 10} with 0 as the start, such as the relative symbol interval corresponding to the pattern of target RSs is one of {0, 2}, {0, 4}, {0, 6}, {0, 8}, {0, 10}, etc.

[0279] If the number of symbols is 3, the pattern of target RSs can be shown in FIG. 8g. It is equivalent to taking 3 symbols with the same RE location from the PRS pattern of comb-2. The relative symbol interval of 3 symbols can be 3 symbols selected from {0, 2, 4, 6, 8, 10} with 0 as the start, such as the relative symbol interval corresponding to the pattern of target RSs is one of {0, 2, 4}, {0, 4, 8}, {0, 4, 10}, {0, 2, 6}, etc.

[0280] If the number of symbols is 4, the pattern of target RSs can be shown in FIG. 8h. It is equivalent to taking 4 symbols with the same RE location from the PRS pattern of comb-2. The relative symbol interval of 4 symbols can be 4 symbols selected from {0, 2, 4, 6, 8, 10} with 0 as the start, such as the relative symbol interval corresponding to the pattern of target RSs is one of {0, 2, 4, 6}, {0, 4, 8, 10}, etc.

[0281] If the number of symbols is 5, the pattern of the target RS can be shown in FIG. 8i. It is equivalent to taking 5 symbols with the same RE position from the PRS pattern of comb-2. The relative symbol interval of the 5 symbols can be one of {0, 2, 4, 6, 8, 10} starting with 0, and selecting 5 symbols; for example, the relative symbol interval of the pattern of the target RS corresponds to one of {0, 2, 4, 6, 8}, {0, 4, 6, 8, 10}, and the like.

[0282] If the number of symbols is 6, the pattern of the target RS can be shown in FIG. 8j. It is equivalent to taking 6 symbols with the same RE position from the PRS pattern of comb-2. The relative symbol interval of the 6 symbols can be one of {0, 2, 4, 6, 8, 10}.

[0283] Embodiment Four: Specific Implementation of the Generation Formula of the Target RS

[0284] In this embodiment, the target RS sequence is generated from a gold sequence, and the generation formula corresponds to the sequence initial value cinit of the Gold sequence.

[0285] (1) If the sequence ID of the target RS is less than or equal to (or less than) the target threshold, the generation formula 1 is used; if the sequence ID of the target RS is greater than (or greater than or equal to) the target threshold, the generation formula 2 is used.

[0286] Here, the target threshold can be indicated by a protocol or a network side device. For example, the target threshold is 1024.

[0287] If the sequence ID is less than or equal to the target threshold, one example of the formula 1 is as follows, that is, the formula of the CSI-RS for mobility supported in the current protocol:

[0288] wherein n ID is the sequence ID of the target RS, l is the symbol index of the target RS, is the slot index of the target RS, is the number of slots of a radio frame.

[0289] If the sequence ID is greater than or equal to the target threshold, one example of the formula 2 is as follows:

[0290] (2) The generation formula is 1, which is related to the target sequence ID and the threshold. For example, the target threshold is 1024, and the generation formula is:

[0291] Embodiment five: multiple target RSs (or target RS resources) of symbols, different symbols correspond to different frequency domain densities.

[0292] On different symbols, the REs with the same RE offset are used to estimate the frequency domain large-scale parameters of the channel; on different symbols, the RE densities can be different, and by arranging lower density REs on some symbols, resource overhead can be reduced and resource utilization can be improved.

[0293] In an implementation, a symbol (e.g., the first symbol) has the highest RE frequency domain density, and subsequent symbols have lower frequency domain densities than the specific symbol. For different symbols, different frequency domain densities can be agreed upon by a protocol or configured by a network. For example, FIGS. 9a and 9b are used for illustration.

[0294] For symbols with different RE frequency domain densities, the network side device further indicates the corresponding RE offset on the symbols, and determines the RE position on each symbol according to the RE offset and the frequency domain density. The determination of the RE position is determined according to one of the following manners:

[0295] (1) For symbols with different frequency domain densities, the corresponding RE offset is indicated respectively.

[0296] Optionally, the RE offset can be indicated according to a bitmap. For example, for a symbol with a comb-4 frequency domain density, the bitmap length is 4; only one bit in the bitmap is 1, indicating the RE position of the comb-4.

[0297] (2) For symbols with different frequency domain densities, the RE position of a symbol with a lower frequency domain density is determined in relation to the RE position of a symbol with a higher frequency domain density.

[0298] For example, the network side device determines the RE position of a symbol with a higher frequency domain density by indicating the RE offset; further, every M REs of the REs of the symbol with the higher frequency domain density have N REs corresponding to the REs of a symbol with a lower frequency domain density. Further, the network side device can indicate the ‘N REs of every M REs’, and M>N.

[0299] Optionally, N=1, and the network indicates ‘one RE of every M REs’; M is the ratio of the densities of two symbols.

[0300] Optionally, N REs in each M REs can be indicated by a bitmap. Bitmap length = M, and bits with value 1 in the bitmap correspond to N REs.

[0301] Embodiment six: multiple target RSs (or target RS resources) of a symbol, different symbols correspond to different bandwidths.

[0302] As shown in FIG. 9c, the target RS can be divided into multiple parts in the time domain. One part is used for coarse timing, and the other part is used for fine timing. Therefore, one part can have a smaller bandwidth (as shown in 901 in FIG. 9c), and the other part has a larger bandwidth (as shown in 902 in FIG. 9c).

[0303] For example: the target RS contains N symbols, the first N / 2 symbols have a smaller bandwidth, and the last N / 2 symbols have a larger bandwidth.

[0304] For example: for 1 target RS, the network configures at least 2 bandwidths. Different bandwidths are associated with different symbols of the target RS.

[0305] Embodiment seven: the target RS has at least one port.

[0306] If the target RS has multiple ports, the multiple ports can be distinguished by at least one of time division multiplexing (TDM), frequency division multiplexing (FDM), and code division multiplexing (CDM).

[0307] The multi-port target RS can be used for channel sounding or estimating the channel spatial correlation parameters between multiple ports. For example: the multi-port target RS is measured in a short time after cell switching, at the time of cell switching, or before cell switching, the channel state information is obtained earlier and reported to the network, and the network can schedule appropriate data for the terminal and determine the precoding information earlier.

[0308] Referring to FIG. 10, the embodiment of the present application further provides a signal transmission method, as shown in FIG. 10, the signal transmission method comprises:

[0309] Step 1001: a network side device sends target reference signal (RS) associated search window information to a terminal, the search window information is used to measure the target RS of a first cell.

[0310] The target RS is used for at least one of mobility management, time-frequency tracking, channel sounding, information demodulation, positioning, sensing, synchronization, and phase tracking.

[0311] Optionally, the search window information includes at least one of time search window information and angle search window information.

[0312] The time search window information comprises at least one of: a center of the time search window, or first information used to determine the center of the time search window; a length of the time search window, or second information used to determine the length of the time search window.

[0313] The angle search window information comprises at least one of: a center of the angle search window, or third information used to determine the center of the angle search window; an angle range of the angle search window, or fourth information used to determine the angle range of the angle search window.

[0314] Optionally, the first information comprises at least one of:

[0315] A desired receiving time difference between the first cell and the second cell;

[0316] A system frame 0 offset of the first cell and the second cell;

[0317] A subframe offset of the first cell and the second cell;

[0318] A time slot offset of the first cell and the second cell;

[0319] A time slot position of the target RS;

[0320] The second cell is a serving cell of the terminal, or the terminal has known a non-serving cell of a receiving time.

[0321] Optionally, the receiving time difference is a difference between a receiving time of a first time unit of the first cell and a start point of a second time unit of the second cell, the second time unit being a time unit closest to the receiving time of the first time unit among start points of time units of the second cell.

[0322] Optionally, the target RSs are at least two, the at least two target RSs are associated with at least two first cells, and the at least two first cells are associated with at least two frequency layers.

[0323] Each frequency layer is associated with one second cell, or all frequency layers are associated with one second cell.

[0324] Optionally, the system frame 0 offset is a time offset between a first time slot of a system frame 0 of the first cell and a first time slot of a system frame 0 of the second cell.

[0325] Optionally, the time slot position of the target RS is determined based on a timing of the first cell.

[0326] Optionally, the measurement behavior of the target RS comprises any one of the following when the received time difference is greater than or equal to a target threshold:

[0327] The terminal does not expect to measure the target RS;

[0328] The terminal does not expect to measure the target RS when a measurement interval is not configured;

[0329] The terminal does not expect to receive the target RS outside the measurement interval when a measurement interval is configured.

[0330] Optionally, the third information comprises at least one of the following:

[0331] An expected angle of arrival between the first cell and the terminal;

[0332] An expected angle of departure between the first cell and the terminal.

[0333] Optionally, the fourth information comprises at least one of the following:

[0334] An expected angle of arrival between the first cell and the terminal;

[0335] An expected angle of departure between the first cell and the terminal.

[0336] Optionally, the method further comprises:

[0337] The network-side device sends first configuration information to the terminal;

[0338] The first configuration information is used to configure a target identifier associated with the target RS, and the target identifier comprises at least one of the following: an RS identifier; a resource identifier of the target RS; and identifier information of the first cell.

[0339] Optionally, the target RS is carried by a plurality of symbols, and at least two of the plurality of symbols have target RS resource elements REs with the same frequency domain position, or all of the plurality of symbols have target RS resource elements REs with the same frequency domain position.

[0340] Optionally, a formula of a generation sequence of the target RS is determined based on at least one of the following: a sequence identifier of the target RS and a threshold associated with the sequence identifier.

[0341] Optionally, the method further comprises:

[0342] The network-side device sends second configuration information to the terminal;

[0343] The second configuration information is used for configuring a period of the target RS, and the period of the target RS includes a first period in which the target RS is actually transmitted and a second period in which the target RS is not actually transmitted.

[0344] Optionally, the method further includes:

[0345] The network-side device sends third configuration information to the terminal.

[0346] The third configuration information is used for configuring target quasi co-location (QCL) information associated with the target RS, a source RS in the target QCL information is a positioning reference signal (PRS) or another target RS of the first cell, and the QCL information includes at least one of the following: QCL information used for determining spatial filter information and QCL information used for determining timing.

[0347] Optionally, in a case where the first cell includes at least two target RSs, the method further includes:

[0348] The network-side device sends target indication information to the terminal, the target indication information is used for indicating that ports of at least part of the at least two target RSs are the same port, and the at least part of the target RSs are used for joint channel estimation.

[0349] The signal transmission method provided in the embodiments of the present application can be executed by a signal transmission device. In the embodiments of the present application, the signal transmission method is executed by a signal transmission device as an example, and the signal transmission device provided in the embodiments of the present application is described.

[0350] The embodiments of the present application provide a signal transmission device. As an example, the signal transmission device can be a communication device or a component in a communication device, for example, a chip. The communication device can be a terminal, a network-side device, a server, or the like. For example, the terminal can include, but is not limited to, the types of the terminal 11 listed above, the network-side device can include, but is not limited to, the types of the network-side device 12 listed above, and the embodiments of the present application are not limited specifically.

[0351] The signal transmission apparatus comprises a receiving module, a sending module and a processing module. The receiving module, the sending module and the processing module can be implemented by software or by hardware. When implemented by hardware, the processing module can be implemented by a processor, which can include a general-purpose processor, a special-purpose processor, a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), an artificial intelligent (AI) processor, a graphics processing unit (GPU), an application specific integrated circuit (ASIC), a network processor (NP), a field programmable gate array (FPGA) or other programmable logic devices, a gate circuit, a transistor, a discrete hardware component, etc. The receiving module and the sending module can be implemented by a communication interface, which can include a transceiver, a pin, a circuit, a bus, a radio frequency unit, etc.

[0352] Specifically, referring to FIG. 11, when the signal transmission apparatus is a terminal or a component in the terminal, the signal transmission apparatus 1100 comprises:

[0353] The receiving module 1101 is configured to acquire search window information associated with a target reference signal (RS); and measure the target RS of a first cell based on the search window information.

[0354] The target RS is used for at least one of mobility management, time-frequency tracking, channel sounding, information demodulation, positioning, sensing, synchronization and phase tracking.

[0355] Optionally, the search window information comprises at least one of time search window information and angle search window information.

[0356] The time search window information comprises at least one of a center of a time search window or first information used to determine the center of the time search window, a length of the time search window or second information used to determine the length of the time search window.

[0357] The angle search window information comprises at least one of a center of an angle search window or third information used to determine the center of the angle search window, an angle range of the angle search window or fourth information used to determine the angle range of the angle search window.

[0358] Optionally, the first information comprises at least one of:

[0359] a desired reception time difference between the first cell and a second cell;

[0360] a system frame 0 offset between the first cell and the second cell;

[0361] a subframe offset between the first cell and the second cell;

[0362] a time slot offset between the first cell and the second cell;

[0363] a time slot position of the target RS;

[0364] wherein the second cell is a serving cell of the terminal, or the terminal has known a non-serving cell of the reception time.

[0365] Optionally, the reception time difference is a difference between a reception time of a first time unit of the first cell and a start of a second time unit of the second cell, the second time unit being a time unit of the second cell whose start is closest to the reception time of the first time unit.

[0366] Optionally, the target RSs are at least two, the at least two target RSs are associated with at least two first cells, and the at least two first cells are associated with at least two frequency layers.

[0367] wherein each frequency layer is associated with one second cell, or all frequency layers are associated with one second cell.

[0368] Optionally, the system frame 0 offset is a time offset between a first time slot of a system frame 0 of the first cell and a first time slot of a system frame 0 of the second cell.

[0369] Optionally, the time slot position of the target RS is determined based on a timing of the first cell.

[0370] Optionally, in a case that the reception time difference is greater than or equal to a target threshold, the measurement behavior of the target RS comprises any one of:

[0371] the terminal does not expect to measure the target RS;

[0372] in a case that a measurement interval is not configured, the terminal does not expect to measure the target RS;

[0373] in a case that a measurement interval is configured, the terminal does not expect to receive the target RS outside the measurement interval.

[0374] Optionally, the third information comprises at least one of:

[0375] an expected angle of arrival between the first cell and the terminal;

[0376] an expected angle of departure between the first cell and the terminal.

[0377] Optionally, the fourth information comprises at least one of:

[0378] an expected angle of arrival between the first cell and the terminal;

[0379] an expected angle of departure between the first cell and the terminal.

[0380] Optionally, the receiving module 1101 is specifically configured to: determine a time search window based on the search window information; and measure the target RS of the first cell based on the time search window.

[0381] Optionally, the receiving module 1101 is further configured to perform at least one of:

[0382] not expected to measure or search for the target RS outside the time search window;

[0383] stop or suspend measurement or search for the target RS in a case where the target RS is not detected within the time search window.

[0384] Optionally, in a case where the terminal is not configured with a time search window, the terminal measures the target RS based on timing of a serving cell.

[0385] Optionally, the signal transmission apparatus 1100 further comprises a processing module configured to perform at least one of:

[0386] determine, based on target information, whether the target RS collides with other signals or channels;

[0387] determine, based on target information, a time unit in which the target RS collides with other signals or channels.

[0388] wherein the target information comprises at least one of: a time unit in which the target RS is located, and a time unit affected by a time search window of the target RS.

[0389] Optionally, the receiving module 1101 is further configured to receive first configuration information from a network side device.

[0390] wherein the first configuration information is used to configure a target identifier associated with the target RS, and the target identifier comprises at least one of: an RS identifier, a resource identifier of the target RS, and identification information of the first cell.

[0391] Optionally, the target RS is carried by multiple symbols, and at least two of the multiple symbols have target RS resource elements REs with the same frequency domain location, or all of the symbols have target RS resource elements REs with the same frequency domain location.

[0392] Optionally, a formula of a generation sequence of the target RS is determined based on at least one of the following: a sequence identifier of the target RS and a threshold associated with the sequence identifier.

[0393] Optionally, the receiving module 1101 is further configured to receive second configuration information from a network side device.

[0394] The second configuration information is used to configure a period of the target RS, and the period of the target RS includes a first period in which the target RS is actually transmitted and a second period in which the target RS is not actually transmitted.

[0395] Optionally, the receiving module 1101 is further configured to receive third configuration information from a network side device.

[0396] The third configuration information is used to configure target QCL information associated with the target RS, a source RS in the target QCL information is a positioning reference signal PRS or another target RS of the first cell; and the QCL information includes at least one of the following: QCL information used to determine spatial filter information and QCL information used to determine timing.

[0397] Optionally, the receiving module 1101 is further configured to, in a case where one of the first cells includes at least two target RSs, receive target indication information from a network side device, the target indication information is used to indicate that ports of at least part of the at least two target RSs are the same port, and the at least part of the target RSs are used for joint channel estimation.

[0398] Optionally, the target RS satisfies at least one of the following:

[0399] All target RSs corresponding to one frequency layer or one first cell are configured in N time search windows, and a length of each time search window is less than a preset value, N is a positive integer;

[0400] A plurality of target RSs corresponding to one first cell correspond to different beams respectively.

[0401] Referring to FIG. 12, when the signal transmission apparatus is a network side device or a component in the network side device, the signal transmission apparatus 1200 includes:

[0402] The sending module 1201 is configured to send target reference signal RS associated search window information to a terminal, the search window information being used to measure the target RS of the first cell.

[0403] The target RS is used for at least one of mobility management, time-frequency tracking, channel sounding, information demodulation, positioning, sensing, synchronization and phase tracking.

[0404] Optionally, the search window information comprises at least one of time search window information and angle search window information.

[0405] The time search window information comprises at least one of: a center of the time search window, or first information used for determining the center of the time search window; a length of the time search window, or second information used for determining the length of the time search window.

[0406] The angle search window information comprises at least one of: a center of the angle search window, or third information used for determining the center of the angle search window; an angle range of the angle search window, or fourth information used for determining the angle range of the angle search window.

[0407] Optionally, the first information comprises at least one of:

[0408] A desired receiving time difference between the first cell and the second cell;

[0409] A system frame 0 offset between the first cell and the second cell;

[0410] A subframe offset between the first cell and the second cell;

[0411] A slot offset between the first cell and the second cell;

[0412] A slot position of the target RS;

[0413] The second cell is a serving cell of the terminal, or the terminal has known a non-serving cell of receiving time.

[0414] Optionally, the receiving time difference is a difference between a receiving time of a first time unit of the first cell and a start point of a second time unit of the second cell, the second time unit being a time unit closest to the receiving time of the first time unit among start points of time units of the second cell.

[0415] Optionally, the target RSs are at least two, the at least two target RSs are associated with at least two first cells, and the at least two first cells are associated with at least two frequency layers.

[0416] Each frequency layer is associated with one second cell, or all frequency layers are associated with the same second cell.

[0417] Optionally, the system frame 0 offset is a time offset of a first time slot of system frame 0 of the first cell and a first time slot of system frame 0 of the second cell.

[0418] Optionally, the time slot position of the target RS is determined based on a timing of the first cell.

[0419] Optionally, in a case that the received time difference is greater than or equal to a target threshold, the measurement behavior of the target RS comprises any one of the following:

[0420] the terminal does not expect to measure the target RS;

[0421] in a case that a measurement interval is not configured, the terminal does not expect to measure the target RS;

[0422] in a case that a measurement interval is configured, the terminal does not expect to receive the target RS out of the measurement interval.

[0423] Optionally, the third information comprises at least one of the following:

[0424] an expected angle of arrival between the first cell and the terminal;

[0425] an expected angle of departure between the first cell and the terminal.

[0426] Optionally, the fourth information comprises at least one of the following:

[0427] an expected angle of arrival between the first cell and the terminal;

[0428] an expected angle of departure between the first cell and the terminal.

[0429] Optionally, the sending module 1201 is further configured to send first configuration information to the terminal.

[0430] The first configuration information is used to configure a target identity associated with the target RS, and the target identity comprises at least one of the following: an RS identity; a resource identity of the target RS; and identity information of the first cell.

[0431] Optionally, the target RS is carried by a plurality of symbols, and at least two of the plurality of symbols have target RS resource elements REs with the same frequency domain position, or all of the plurality of symbols have target RS resource elements REs with the same frequency domain position.

[0432] Optionally, a formula of a generation sequence of the target RS is determined based on at least one of the following: a sequence identity of the target RS and a threshold associated with the sequence identity.

[0433] Optionally, the sending module 1201 is further configured to send second configuration information to the terminal.

[0434] The second configuration information is used for configuring a period of the target RS, and the period of the target RS includes a first period in which the target RS is actually transmitted and a second period in which the target RS is not actually transmitted.

[0435] Optionally, the sending module 1201 is further configured to send third configuration information to the terminal.

[0436] The third configuration information is used for configuring target quasi co-location (QCL) information associated with the target RS, a source RS in the target QCL information is a positioning reference signal (PRS) or another target RS of the first cell, and the QCL information includes at least one of the following: QCL information used for determining spatial filter information and QCL information used for determining timing.

[0437] Optionally, the sending module 1201 is further configured to, in a case where one of the first cells includes at least two target RSs, send target indication information to the terminal, the target indication information is used for indicating that ports of at least part of the at least two target RSs are the same ports, and the at least part of the target RSs are used for joint channel estimation.

[0438] Optionally, the target RS satisfies at least one of the following:

[0439] All target RSs corresponding to one frequency layer or one first cell are configured in N time search windows, and a length of each time search window is less than a preset value, N is a positive integer.

[0440] A plurality of target RSs corresponding to one first cell correspond to different beams respectively.

[0441] The signal transmission apparatus provided in the embodiments of the present application can implement each process implemented by the method embodiments of FIG. 2 and FIG. 10, and achieve the same technical effects. To avoid repetition, details are not described herein.

[0442] As shown in FIG. 13, the embodiments of the present application further provide a communication device 1300, which includes a processor 1301 and a memory 1302, the memory 1302 stores programs or instructions executable on the processor 1301, for example, when the communication device 1300 is a terminal, the programs or instructions are executed by the processor 1301 to implement each step of the above signal transmission method embodiments, and the same technical effects can be achieved, to avoid repetition, details are not described herein.

[0443] The embodiment of the present application further provides a terminal comprising a processor and a communication interface, the communication interface being coupled with the processor, and the processor being used to run programs or instructions to realize the steps in the method embodiment shown in FIG. 2. The terminal embodiment corresponds to the terminal-side method embodiment described above, and each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment and achieve the same technical effects. The terminal can be the signal transmission device shown in FIG. 11. Specifically, FIG. 14 is a schematic diagram of the hardware structure of a terminal for implementing the embodiment of the present application.

[0444] The terminal 1400 comprises, but is not limited to, at least part of components such as a radio frequency unit 1401, a network module 1402, an audio output unit 1403, an input unit 1404, a sensor 1405, a display unit 1406, a user input unit 1407, an interface unit 1408, a memory 1409, and a processor 1410.

[0445] Those skilled in the art can understand that the terminal 1400 can further comprise a power supply (such as a battery) for supplying power to each component, and the power supply can be logically connected with the processor 1410 through a power management system, so as to realize functions such as management of charging, discharging, and power consumption management through the power management system. The terminal structure shown in FIG. 14 does not constitute a limitation on the terminal, and the terminal can comprise more or fewer components than those shown, or some components can be combined, or different components can be arranged, which will not be described here.

[0446] It should be understood that in the embodiment of the present application, the input unit 1404 can comprise a graphics processor 14041 and a microphone 14042, and the graphics processor 14041 processes image data of a still picture or a video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1406 can comprise a display panel 14061, which can be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 1407 comprises at least one of a touch panel 14071 and other input devices 14072. The touch panel 14071 is also called a touch screen. The touch panel 14071 can comprise two parts of a touch detection device and a touch controller. The other input devices 14072 can comprise, but are not limited to, a physical keyboard, function keys (such as volume control keys, on-off keys, etc.), a trackball, a mouse, a joystick, etc., which will not be described here.

[0447] In the embodiment of the present application, after the radio frequency unit 1401 receives downlink data from a network side device, the downlink data can be transmitted to the processor 1410 for processing. In addition, the radio frequency unit 1401 can send uplink data to the network side device. Generally, the radio frequency unit 1401 comprises, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0448] The memory 1409 can be used to store software programs or instructions and various data. The memory 1409 can mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area can store an operating system, application programs or instructions required by at least one function (such as a sound playing function, an image playing function, etc.), and the like. In addition, the memory 1409 can include a volatile memory or a non-volatile memory. The non-volatile memory can be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically EPROM (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 1409 in the embodiments of the present application includes but is not limited to these and any other suitable types of memory.

[0449] The processor 1410 can include one or more processing units; optionally, the processor 1410 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and an application program, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 1410.

[0450] The radio frequency unit 1401 is configured to obtain search window information associated with a target reference signal (RS); and measure the target RS of a first cell based on the search window information.

[0451] The target RS is used for at least one of mobility management, time-frequency tracking, channel sounding, information demodulation, positioning, sensing, synchronization, and phase tracking.

[0452] It can be understood that the implementation process of each implementation mode mentioned in the embodiment can refer to the related description of the terminal side method embodiment and achieve the same or corresponding technical effects. To avoid repetition, it will not be described here.

[0453] The embodiment of the application further provides a network side device, comprising a processor and a communication interface, the communication interface and the processor are coupled, the processor is used to run programs or instructions, and the steps of the method embodiment shown in FIG. 10 are realized. The network side device embodiment corresponds to the network side device method embodiment described above, and each implementation process and implementation mode of the above method embodiment can be applied to the network side device embodiment and can achieve the same technical effects.

[0454] Specifically, the embodiment of the application further provides a network side device, which can be the signal transmission device shown in FIG. 12. As shown in FIG. 15, the network side device 1500 comprises an antenna 1501, a radio frequency device 1502, a baseband device 1503, a processor 1504 and a memory 1505. The antenna 1501 is connected with the radio frequency device 1502. In the uplink direction, the radio frequency device 1502 receives information through the antenna 1501 and sends the received information to the baseband device 1503 for processing. In the downlink direction, the baseband device 1503 processes the information to be sent and sends it to the radio frequency device 1502, and the radio frequency device 1502 processes the received information and sends it out through the antenna 1501.

[0455] The method performed by the network side device in the above embodiment can be implemented in the baseband device 1503, which comprises a baseband processor.

[0456] The baseband device 1503 may, for example, comprise at least one baseband board, and a plurality of chips are arranged on the baseband board, as shown in FIG. 15, one of which is a baseband processor, which is connected with the memory 1505 through a bus interface to call the programs in the memory 1505 and execute the network side device operations shown in the above method embodiment.

[0457] The network side device may further comprise a network interface 1506, which is, for example, a common public radio interface (CPRI).

[0458] Specifically, the network side device 1500 of the embodiment of the application further comprises instructions or programs stored in the memory 1505 and executable on the processor 1504, the processor 1504 calls the instructions or programs in the memory 1505 to execute the method performed by each module shown in FIG. 12, and achieves the same technical effects. To avoid repetition, it will not be described here.

[0459] The embodiment of the present application further provides a readable storage medium, and the readable storage medium stores programs or instructions, which are executed by a processor to realize the processes of the signal transmission method embodiments and achieve the same technical effects. To avoid repetition, details are not described herein.

[0460] The processor is the processor in the terminal in the above embodiments. The readable storage medium includes a computer readable storage medium, such as a computer readable only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc. In some examples, the readable storage medium can be a non-transitory readable storage medium.

[0461] The embodiment of the present application further provides a chip, which includes a processor and a communication interface. The communication interface is coupled with the processor. The processor is used to run programs or instructions to realize the processes of the signal transmission method embodiments and achieve the same technical effects. To avoid repetition, details are not described herein.

[0462] It should be understood that the chip mentioned in the embodiment of the present application can also be referred to as a system chip, a system chip, a chip system or a system on chip, etc.

[0463] The embodiment of the present application further provides a computer program / program product, which includes computer instructions. The computer program / program product is executed by at least one processor to realize the processes of the signal transmission method embodiments and achieve the same technical effects. To avoid repetition, details are not described herein.

[0464] The embodiment of the present application further provides a wireless communication system, which includes a terminal and a network side device. The terminal can be used to execute the steps of the signal transmission method on the terminal side. The network side device can be used to execute the steps of the signal transmission method on the network side.

[0465] It should be noted that, in the present document, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a", "comprising", or the like does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element. Furthermore, it is to be understood that the methods and apparatuses of the present application can be carried out by specific hardware, software, or a combination thereof, and that the scope of the application is not limited to the specific order of execution of the steps described in the examples. In addition, features described in relation to certain examples can be combined in other examples.

[0466] From the above description of the embodiments, it is clear that the above-mentioned method can be realized by means of a computer software product and a general hardware platform, of course, it can also be realized by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disc, optical disc, etc.), and includes a plurality of instructions for making the terminal or network side device execute the method described in each embodiment of the present application.

[0467] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above-mentioned specific embodiments, the above-mentioned specific embodiments are only illustrative, not restrictive, and those skilled in the art can make many forms of embodiments under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims.

Claims

1. A signal transmission method, comprising: The terminal acquires the search window information associated with the target reference signal RS; The terminal measures the target RS of the first cell based on the search window information; The target RS is used for at least one of mobility management, time-frequency tracking, channel detection, information demodulation, positioning, sensing, synchronization and phase tracking.

2. The method according to claim 1, wherein, The search window information includes at least one of time search window information and angle search window information; The time search window information includes at least one of the following: the center of the time search window, or first information for determining the center of the time search window; the length of the time search window, or second information for determining the length of the time search window. The angle search window information includes at least one of the following: the center of the angle search window, or third information used to determine the center of the angle search window; the angle range of the angle search window, or fourth information used to determine the angle range of the angle search window.

3. The method according to claim 2, wherein, The first information includes at least one of the following: The expected reception time difference between the first cell and the second cell; The system frames of the first cell and the second cell are offset by 0. Subframe offset between the first cell and the second cell; The time slot offset between the first cell and the second cell; The time slot position of the target RS; Wherein, the second cell is the serving cell of the terminal, or a non-serving cell in which the terminal has learned the reception time.

4. The method according to claim 3, wherein, The reception time difference is the difference between the reception time of the first time unit of the first cell and the starting point of the second time unit of the second cell, where the second time unit is the time unit of the second cell whose reception time is closest to that of the first time unit.

5. The method according to claim 3, wherein, The number of target RSs is at least two, and at least two target RSs are associated with at least two first cells, and at least two first cells are associated with at least two frequency layers; Each frequency layer is associated with one second cell, or all frequency layers are associated with the same second cell.

6. The method according to claim 3, wherein, The system frame 0 offset is the time offset between the first time slot of system frame 0 of the first cell and the first time slot of system frame 0 of the second cell.

7. The method according to claim 3, wherein, The time slot location of the target RS is determined based on the timing of the first cell.

8. The method according to claim 3, wherein, When the reception time difference is greater than or equal to the target threshold, the measurement behavior of the target RS includes any of the following: The terminal does not intend to measure the target RS; Without a configured measurement interval, the terminal does not intend to measure the target RS; When a measurement interval is configured, the terminal does not expect to receive the target RS outside the measurement interval.

9. The method according to claim 2, wherein, The third information includes at least one of the following: The expected angle of arrival between the first cell and the terminal; The desired departure angle between the first cell and the terminal.

10. The method according to claim 2, wherein, The fourth piece of information includes at least one of the following: The expected angle of arrival between the first cell and the terminal; The desired departure angle between the first cell and the terminal.

11. The method according to claim 1, wherein, The terminal measures the target RS of the first cell based on the search window information, including: The terminal determines the time search window based on the search window information; The terminal measures the target RS of the first cell based on the time search window.

12. The method according to claim 11, wherein, The method further includes at least one of the following: The terminal does not expect to measure or search for the target RS outside the time search window; If the terminal does not detect the target RS within the time search window, it stops or pauses the measurement or search for the target RS.

13. The method according to claim 1, wherein, If the terminal is not configured with a time search window, the terminal measures the target RS based on the timing of the serving cell.

14. The method according to claim 1, wherein, The method further includes at least one of the following: The terminal determines whether the target RS collides with other signals or channels based on the target information; The terminal determines the time unit in which the target RS collides with other signals or channels based on the target information; The target information includes at least one of the following: the time unit in which the target RS is located, and the time unit affected by the time search window of the target RS.

15. The method according to claim 1, wherein, The method further includes: The terminal receives first configuration information from the network-side device; The first configuration information is used to configure the target identifier associated with the target RS, and the target identifier includes at least one of the following: RS identifier; resource identifier of the target RS; and identifier information of the first cell.

16. The method according to claim 1, wherein, The target RS is carried by multiple symbols, and at least two of the multiple symbols have target RS resource particles RE with the same frequency domain position, or all symbols have target RS resource particles RE with the same frequency domain position.

17. The method according to claim 1, wherein, The formula for generating the sequence of the target RS is determined based on at least one of the following: the sequence identifier of the target RS and a threshold associated with the sequence identifier.

18. The method according to claim 1, wherein, The method further includes: The terminal receives second configuration information from the network-side device; The second configuration information is used to configure the period of the target RS, and the period of the target RS includes a first period in which the target RS is actually sent and a second period in which the target RS is not actually sent.

19. The method according to claim 1, wherein, The method further includes: The terminal receives third configuration information from the network-side device; The third configuration information is used to configure the target quasi-co-location QCL information associated with the target RS. The source RS in the target QCL information is the Positioning Reference Signal (PRS) or another target RS of the first cell. The QCL information includes at least one of the following: QCL information for determining spatial filter information and QCL information for determining timing.

20. The method according to claim 1, wherein, In the case where a first cell includes at least two of the target RSs, the method further includes: The terminal receives target indication information from the network-side device. The target indication information is used to indicate that at least some of the target RSs among the at least two target RSs have the same port. The at least some target RSs are used for joint channel estimation.

21. The method according to claim 1, wherein, The target RS satisfies at least one of the following: All target RSs corresponding to a frequency layer or a first cell are configured in N time search windows, and the length of each time search window is less than a preset value, where N is a positive integer; The multiple target RSs corresponding to a first cell each correspond to different beams.

22. A signal transmission method, comprising: The network-side device sends search window information associated with the target reference signal RS to the terminal, and the search window information is used to measure the target RS of the first cell; The target RS is used for at least one of mobility management, time-frequency tracking, channel detection, information demodulation, positioning, sensing, synchronization and phase tracking.

23. The method according to claim 22, wherein, The search window information includes at least one of time search window information and angle search window information; The time search window information includes at least one of the following: the center of the time search window, or first information for determining the center of the time search window; the length of the time search window, or second information for determining the length of the time search window. The angle search window information includes at least one of the following: the center of the angle search window, or third information used to determine the center of the angle search window; the angle range of the angle search window, or fourth information used to determine the angle range of the angle search window.

24. The method according to claim 23, wherein, The first information includes at least one of the following: The expected reception time difference between the first cell and the second cell; The system frames of the first cell and the second cell are offset by 0. Subframe offset between the first cell and the second cell; The time slot offset between the first cell and the second cell; The time slot position of the target RS; Wherein, the second cell is the serving cell of the terminal, or a non-serving cell in which the terminal has learned the reception time.

25. The method according to claim 24, wherein, The reception time difference is the difference between the reception time of the first time unit of the first cell and the starting point of the second time unit of the second cell, where the second time unit is the time unit of the second cell whose reception time is closest to that of the first time unit.

26. The method of claim 24, wherein, The number of target RSs is at least two, and at least two target RSs are associated with at least two first cells, and at least two first cells are associated with at least two frequency layers; Each frequency layer is associated with one second cell, or all frequency layers are associated with the same second cell.

27. The method according to claim 24, wherein, The system frame 0 offset is the time offset between the first time slot of system frame 0 of the first cell and the first time slot of system frame 0 of the second cell.

28. The method according to claim 24, wherein, The time slot location of the target RS is determined based on the timing of the first cell.

29. The method according to claim 24, wherein, When the reception time difference is greater than or equal to the target threshold, the measurement behavior of the target RS includes any of the following: The terminal does not intend to measure the target RS; Without a configured measurement interval, the terminal does not intend to measure the target RS; When a measurement interval is configured, the terminal does not expect to receive the target RS outside the measurement interval.

30. The method according to claim 23, wherein, The third information includes at least one of the following: The expected angle of arrival between the first cell and the terminal; The desired departure angle between the first cell and the terminal.

31. The method according to claim 23, wherein, The fourth piece of information includes at least one of the following: The expected angle of arrival between the first cell and the terminal; The desired departure angle between the first cell and the terminal.

32. The method according to claim 22, wherein, The method further includes: The network-side device sends first configuration information to the terminal; The first configuration information is used to configure the target identifier associated with the target RS, and the target identifier includes at least one of the following: RS identifier; resource identifier of the target RS; and identifier information of the first cell.

33. The method according to claim 22, wherein, The target RS is carried by multiple symbols, and at least two of the multiple symbols have target RS resource particles RE with the same frequency domain position, or all symbols have target RS resource particles RE with the same frequency domain position.

34. The method according to claim 22, wherein, The formula for generating the sequence of the target RS is determined based on at least one of the following: the sequence identifier of the target RS and a threshold associated with the sequence identifier.

35. The method according to claim 22, wherein, The method further includes: The network-side device sends second configuration information to the terminal; The second configuration information is used to configure the period of the target RS, and the period of the target RS includes a first period in which the target RS is actually sent and a second period in which the target RS is not actually sent.

36. The method according to claim 22, wherein, The method further includes: The network-side device sends third configuration information to the terminal; The third configuration information is used to configure the target quasi-co-location QCL information associated with the target RS. The source RS in the target QCL information is the Positioning Reference Signal (PRS) or another target RS of the first cell. The QCL information includes at least one of the following: QCL information for determining spatial filter information and QCL information for determining timing.

37. The method according to claim 22, wherein, In the case where a first cell includes at least two of the target RSs, the method further includes: The network-side device sends target indication information to the terminal. The target indication information is used to indicate that at least some of the target RSs among the at least two target RSs have the same port. The at least some target RSs are used for joint channel estimation.

38. A signal transmission device, comprising: The receiving module is used to acquire the search window information associated with the target reference signal RS; The target RS of the first cell is measured based on the search window information; The target RS is used for at least one of mobility management, time-frequency tracking, channel detection, information demodulation, positioning, sensing, synchronization and phase tracking.

39. The apparatus according to claim 38, wherein, The search window information includes at least one of time search window information and angle search window information; The time search window information includes at least one of the following: the center of the time search window, or first information for determining the center of the time search window; the length of the time search window, or second information for determining the length of the time search window. The angle search window information includes at least one of the following: the center of the angle search window, or third information used to determine the center of the angle search window; the angle range of the angle search window, or fourth information used to determine the angle range of the angle search window.

40. The apparatus according to claim 38, wherein, The receiving module is specifically used for: determining a time search window based on the search window information; and measuring the target RS of the first cell based on the time search window.

41. A signal transmission device, comprising: The transmitting module is used to transmit search window information associated with the target reference signal RS to the terminal, wherein the search window information is used to measure the target RS of the first cell; The target RS is used for at least one of mobility management, time-frequency tracking, channel detection, information demodulation, positioning, sensing, synchronization and phase tracking.

42. The apparatus according to claim 41, wherein, The search window information includes at least one of time search window information and angle search window information; The time search window information includes at least one of the following: the center of the time search window, or first information for determining the center of the time search window; the length of the time search window, or second information for determining the length of the time search window. The angle search window information includes at least one of the following: the center of the angle search window, or third information used to determine the center of the angle search window; the angle range of the angle search window, or fourth information used to determine the angle range of the angle search window.

43. A terminal comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the signal transmission method as claimed in any one of claims 1 to 21.

44. A network-side device, comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the signal transmission method as claimed in any one of claims 22 to 37.

45. A readable storage medium storing a program or instructions that, when executed by a processor, implement the steps of the signal transmission method as claimed in any one of claims 1 to 37.

46. ​​A computer program product comprising computer instructions that, when executed by a processor, implement the steps of the signal transmission method as described in any one of claims 1 to 37.

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