Reference signal sending method and apparatus, and reference signal receiving method and apparatus

Abstract

The present application belongs to the technical field of wireless communications. Disclosed are a reference signal sending method and apparatus, and a reference signal receiving method and apparatus. The reference signal sending method in the embodiments of the present application comprises: a network-side device sending first information to a terminal, wherein the first information is used for instructing the network-side device to send a reference signal; and the network-side device sending the reference signal to the terminal.

Description

Reference signal sending method, receiving method and device

[0001] Cross-references

[0002] The present disclosure claims priority to Chinese patent application No. 202410036933X filed on January 9, 2024, and Chinese patent application No. 2024101854648 filed on February 19, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of wireless communication technology, and specifically relates to a reference signal sending method, receiving method and device. Background Art

[0004] Network energy conservation is crucial for environmental sustainability, reducing environmental impacts (such as the impact of greenhouse gas emissions), and reducing operational costs. As 5G becomes more widespread across various industries and regions, and more advanced services and applications (such as Extended Range (XR)) requiring very high data rates are widely adopted, networks are becoming denser, using more antennas, greater bandwidth, and more frequency bands. Therefore, in order to keep the environmental impact of 5G within a certain range, new solutions need to be developed to improve network energy conservation.

[0005] In related technologies, network-side devices (such as base stations) periodically send synchronization signal blocks (SSBs) to meet terminal synchronization and measurement requirements. However, periodic SSB transmission is detrimental to base stations, especially those serving as secondary cells (such as secondary cells). Therefore, how to send SSBs to achieve energy conservation in network-side devices is a technical problem that needs to be solved. Summary of the Invention

[0006] The embodiments of the present application provide a method for sending, a method for receiving, and an apparatus for sending a reference signal.

[0007] In a first aspect, a method for sending a reference signal is provided, which is performed by a network-side device. The method includes:

[0008] The network side device sends first information to the terminal; the first information is used to instruct the network side device to send a reference signal;

[0009] The network-side device sends the reference signal to the terminal.

[0010] In a second aspect, a reference signal receiving method is provided, which is performed by a terminal. The method includes:

[0011] The terminal receives first information sent by a network-side device; the first information is used to instruct the network-side device to send a reference signal;

[0012] The terminal determines, according to the first information, whether to receive the reference signal sent by the network-side device.

[0013] According to a third aspect, a reference signal transmitting apparatus is provided, including:

[0014] A first sending module is configured to send first information to a terminal; the first information is used to instruct the network side device to send a reference signal;

[0015] The second sending module is configured to send the reference signal to the terminal.

[0016] In a fourth aspect, a reference signal receiving apparatus is provided, including:

[0017] A receiving module, configured to receive first information sent by a network-side device; the first information is used to instruct the network-side device to send a reference signal;

[0018] A determination module is used to determine whether to receive the reference signal sent by the network side device based on the first information.

[0019] In a fifth aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the first aspect are implemented.

[0020] In a sixth aspect, a network-side device is provided, including a processor and a communication interface, wherein:

[0021] The communication interface is used to send first information to the terminal; the first information is used to instruct the network side device to send a reference signal;

[0022] The processor is configured to send the reference signal to the terminal.

[0023] In a seventh aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the second aspect are implemented.

[0024] In an eighth aspect, a terminal is provided, including a processor and a communication interface, wherein:

[0025] The communication interface is used to receive first information sent by a network side device; the first information is used to instruct the network side device to send a reference signal;

[0026] The processor is configured to determine, according to the first information, whether to receive the reference signal sent by the network-side device.

[0027] In the ninth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0028] In the tenth aspect, a wireless communication system is provided, comprising: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in the second aspect, and the network side device can be used to execute the steps of the method described in the first aspect.

[0029] In the eleventh aspect, a chip is provided, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0030] In the twelfth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0031] In an embodiment of the present application, the network side device sends first information to the terminal, and the first information is used to instruct the network side device to send a reference signal. Then, the network side device sends the reference signal to the terminal, thereby realizing on-demand sending of the reference signal, reducing the power consumption of the network side device, and thus achieving network energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG1 shows a block diagram of a wireless communication system to which embodiments of the present application may be applied;

[0033] FIG2 is a schematic diagram of a flow chart of a method for transmitting a reference signal according to an embodiment of the present application;

[0034] FIG3 is a schematic flow chart of a method for receiving a reference signal according to an embodiment of the present application;

[0035] FIG4 is a schematic diagram of a base station triggering the sending of an on-demand SSB before SCell activation according to an embodiment of the present application;

[0036] FIG5 is a schematic diagram of a reception time of SSB provided in an embodiment of the present application;

[0037] FIG6 is a second schematic diagram of the SSB reception time provided in an embodiment of the present application;

[0038] FIG7 is a schematic structural diagram of a reference signal transmitting apparatus provided in an embodiment of the present application;

[0039] FIG8 is a schematic structural diagram of a reference signal receiving apparatus provided in an embodiment of the present application;

[0040] FIG9 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0041] FIG10 is a schematic diagram of the hardware structure of a terminal provided in an embodiment of the present application;

[0042] FIG11 is a schematic diagram of the hardware structure of the network side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0044] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects, for example, the first object can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three options, namely, Option 1: including A but not including B; Option 2: including B but not including A; Option 3: including both A and B. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0045] The term "indication" in this application can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, the operation to be performed, or the requested result, etc. in the instruction sent; an indirect indication can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the operation to be performed or the requested result, etc. based on the judgment result.

[0046] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) systems. th Generation, 6G) communication system.

[0047] FIG1 is a block diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device (Wearable Device), an aircraft (Flight Vehicle), a vehicle-mounted device (VUE), a ship-mounted device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), a game console, a personal computer (PC), an ATM, or a self-service machine, or other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be called a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (Wireless Local Area Network, WLAN) access point (Access Point, AP) or a wireless fidelity (Wireless Fidelity, WiFi) node, etc.Among them, the base station can be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home evolved Node B (home evolved Node B), Transmission Reception Point (TRP) or other appropriate terms in the relevant field. As long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0048] In order to facilitate a clearer understanding of the technical solutions provided by the embodiments of the present application, some relevant knowledge is first introduced as follows.

[0049] What is known and what is unknown about the cell:

[0050] If the following conditions are met, the secondary cell (SCell) on the frequency band FR1 is known:

[0051] 1. Before receiving the SCell activation command, during a period equal to max(5*mesCycleSCell, 5*DRX cycle) in FR1:

[0052] 1-1. The terminal has sent a valid measurement report for the SCell to be activated;

[0053] 1-2. According to the specified cell identification conditions, the measured SSB still remains detectable.

[0054] Where mesCycleSCell represents the measurement cycle of the Scell; DRX refers to discontinuous reception (Discontinuous Reception);

[0055] 2. According to the specified cell identification conditions, the SSB measured during a period equal to max(5*mesCycleSCell, 5*DRX cycle) also remains detectable during the SCell activation delay.

[0056] Otherwise the SCell in FR1 is unknown.

[0057] For the first SCell activation in frequency band FR2, the SCell is known if the following conditions are met:

[0058] 1. Before the terminal receives the last activation command of the Physical Downlink Control Channel (PDCCH) Transmission Configuration Indicator (TCI), the Physical Downlink Shared Channel (PDSCH) TCI (when applicable), and the semi-persistent Channel State Information Reference Signal (CSI-RS) for Channel Quality Indicator (CQI) reporting (when applicable), the terminal supports power levels 1 / 5, which is equal to 4 seconds, and the terminal supports power levels 2 / 3 / 4, which is equal to 3 seconds:

[0059] 1-1. The terminal sends a valid L3-reference signal received power (RSRP) measurement report corresponding to the SSB index;

[0060] 1-2. The SCell activation command is received after the L3-RSRP report and no later than the time when the terminal receives the MAC-CE command for TCI activation;

[0061] 2. During the period from L3-RSRP reporting to valid CQI reporting, the reported SSB with index remains detectable according to the specified cell identification conditions, and the TCI state is selected based on one of the most recently reported SSB indices.

[0062] Otherwise, the first SCell in FR2 is unknown.

[0063] The reference signal sending method, receiving method, and apparatus provided in the embodiments of the present application are described in detail below with reference to some embodiments and their application scenarios with reference to the accompanying drawings.

[0064] FIG2 is a flow chart of a method for transmitting a reference signal according to an embodiment of the present application. The method is performed by a network-side device. As shown in FIG2 , the method includes steps 201 and 202, wherein:

[0065] Step 201: A network-side device sends first information to a terminal; the first information is used to instruct the network-side device to send a reference signal;

[0066] Step 202: The network-side device sends the reference signal to the terminal.

[0067] It should be noted that the network side equipment may include network side equipment on a satellite, such as a base station on a satellite, and may also include network side equipment on the ground, such as a ground base station.

[0068] Optionally, the reference signal may include at least one of a downlink reference signal, a downlink synchronization signal, a synchronization signal, an SSB burst, an SSB, and an on-demand reference signal. The on-demand reference signal is, for example, an on-demand SSB.

[0069] For example, the downlink reference signal may also include at least one of CSI-RS, demodulation reference signal (DMRS), tracking reference signal (TRS), non-periodic TRS, phase tracking reference signal (PTRS), etc.

[0070] It is understood that an on-demand reference signal is a reference signal sent by a network device based on network or terminal requirements. The network device can switch from a non-transmitting state to a transmitting state, or from one transmitting state to another, such as with a different transmission period, or send additional reference signals.

[0071] Optionally, the network side device sending the first information to the terminal includes: the network side device sending the first information to the terminal at a first frequency;

[0072] The implementation manner in which the network side device sends the reference signal to the terminal may include at least one of the following:

[0073] Mode 1: The network side device sends the reference signal to the terminal on the first frequency / first carrier / first serving cell / first serving cell group / primary cell / primary cell group / primary and secondary cells.

[0074] Mode 2: The network-side device sends the reference signal to the terminal on a second frequency / second carrier / second serving cell / second serving cell group / secondary cell / secondary cell group. For example, the second carrier may be one carrier or a carrier group consisting of multiple carriers.

[0075] It can be understood that the first frequency can also be expressed as a first carrier, a first cell, a first cell group, etc.;

[0076] It can be understood that the first frequency can also be expressed as a second carrier, a second cell, a second cell group, etc.;

[0077] The network device that sends the first information and the network device that sends the reference signal may be the same device or different devices. For example, the network device that sends the first information may be a network device of the primary cell, while the network device that sends the reference signal may be a network device of the secondary cell.

[0078] In an embodiment of the present application, the network side device sends first information to the terminal, and the first information is used to instruct the network side device to send a reference signal. Then, the network side device sends the reference signal to the terminal, thereby realizing on-demand sending of the reference signal, reducing the power consumption of the network side device, and thus achieving network energy saving.

[0079] Optionally, the reference signal may be predefined by a protocol / preconfigured by the network side / configured by the network side.

[0080] Optionally, the first information is indicated according to at least one of the following granularities:

[0081] 1) Serving cell;

[0082] 2) Service cell group;

[0083] 3) Reference signal frequency; for example, an SSB frequency or an SSB frequency group.

[0084] 4) Reference signal frequency group;

[0085] 5) Physical Cell Identifier (PCI);

[0086] 6) PCI group;

[0087] 7) Measurement Object (MO);

[0088] 8) measurement subject group;

[0089] 9) beam;

[0090] 10 beam groups.

[0091] For example, the first information is indicated according to the following granularity: SSB frequency + PCI, or SSB frequency + PCI group.

[0092] Alternatively, the first information is indicated according to the following granularity: a group (SSB frequency + PCI, or SSB frequency + PCI group).

[0093] Optionally, the first information is carried by at least one of the following:

[0094] 1. Downlink Control Information (DCI);

[0095] Specifically, the DCI may be at least one of the following:

[0096] 1) UE specific DCI;

[0097] The terminal-specific DCI satisfies at least one of the following:

[0098] (1) The relevant information of the first information in the terminal-specific DCI may be configured by the network-side device.

[0099] Optionally, the relevant information of the first information may also be predefined by the protocol or preconfigured on the network side, that is, the terminal-specific DCI may not carry the relevant information of the first information.

[0100] (2) The terminal-specific DCI includes relevant information of the first information.

[0101] (3) The terminal-specific DCI includes a first indication field, which is used to indicate the first information.

[0102] The relevant information of the first information includes at least one of the following: the terminal-specific DCI or whether the terminal supports on-demand reference signal transmission; cell or cell group information supporting on-demand reference signals; and transmission configuration information of on-demand reference signals.

[0103] Example 1: The first information is carried in a single-cell uplink scheduling DCI such as DCI 0_0 / 0_1 / 0_2, or in a single-cell downlink scheduling DCI such as DCI 1_0 / 1_1 / 1_2. It can be a scheduling DCI or a non-scheduling DCI. Optionally, the first information or related information of the first information satisfies at least one of the following:

[0104] a) The network side configures relevant information of the first information, including whether the DCI or the terminal supports the on demand SSB function, the indication granularity configuration information for supporting on demand SSB, and at least one item of the configuration information sent by on demand SSB, and determines the size of the relevant indication field of the first information in the DCI based on this information.

[0105] b) Validate as non-scheduling DCI through some fields in the DCI, and repurpose some of the fields to indicate the first information. At the same time, determine the mapping relationship between the indication field and the indication granularity based on the relevant information of the first information configured on the network side (for example, the relevant information of the first information configured on the network side in a)).

[0106] Optionally, the on demand SSB may also be expressed as the aforementioned reference signal.

[0107] Example 2: The first information is carried in a multi-cell scheduling DCI such as DCI 0_3 or 1_3, which can be a scheduling DCI or a non-scheduling DCI. Optionally, the first information or related information of the first information satisfies at least one of the following:

[0108] a) The network side configures relevant information of the first information, including whether the DCI or the terminal supports the on-demand SSB function, the cell or cell group information supporting on-demand SSB, and at least one of the configuration information sent by on-demand SSB, and determines the size of the first information field in the DCI based on this information

[0109] b) Validate as non-scheduling DCI through some fields in the DCI, repurpose some of the fields to indicate the first information, and determine the mapping relationship between the indication field and the cell / cell group based on the relevant information of the first information configured on the network side (for example, the relevant information of the first information configured on the network side in a)).

[0110] 2) group common DCI;

[0111] Optionally, a new group-common DCI is adopted.

[0112] Optionally, the on demand SSB may also be expressed as the aforementioned reference signal.

[0113] The group common DCI satisfies at least one of the following:

[0114] (1) The cyclic redundancy check (CRC) of the group common DCI is scrambled by the radio network temporary identifier (RNTI) that identifies the reference signal. For example, the RNTI indicates that the DCI is related to the triggering or indication of the on-demand SSB.

[0115] (2) A block in the set of common DCI corresponds to a specific terminal.

[0116] For example, SSB for different purposes is triggered for different terminals, and the indication information is reflected in the block.

[0117] (3) A block in the group common DCI corresponds to a granularity, which is at least one of terminal, terminal group, beam, beam group, serving cell, serving cell group, reference signal frequency, reference signal frequency group, PCI, PCI group, measurement object, and measurement object group.

[0118] (4) The group common DCI is used to indicate at least one of the following: transmission of the reference signal; triggering transmission of the reference signal; cell activation; cell deactivation; synchronization; and measurement. For example, this DCI is used to trigger transmission of an SSB and simultaneously indicate activation of a cell.

[0119] Optionally, the group common DCI includes: a second indication field, used to indicate that the group common DCI includes the first information; and a reference signal of a serving cell corresponding to the group common DCI is sent on demand.

[0120] Optionally, the unified indication triggers a reference signal for the received terminal and / or whether it is used for cell activation / sleep indication, etc. For example, it is determined by relevant information such as a cell ID.

[0121] Optionally, when one block in the group common DCI corresponds to one granularity, the block includes at least one of the following:

[0122] A third indication field is used to indicate whether to send the reference signal;

[0123] The fourth indication field is used to indicate the type of the reference signal.

[0124] For example, 1 bit is used on each block to indicate whether to send a reference signal.

[0125] For another example, each block indicates which reference signal is to be sent, for example, by multiple bits or a bitmap.

[0126] The network side configures / instructs each terminal (per UE) or some terminals to read which blocks in the DCI, or the network side configures / instructs the terminal corresponding granularity for each terminal or some terminals.

[0127] It should be noted that different blocks may correspond to the same or different indication granularities. For example, one block may correspond to a serving cell, and another block may correspond to an MO ID or an SSB frequency.

[0128] Optionally, reuse existing group common DCI, such as DCI 2_9.

[0129] Specifically, determining whether the corresponding serving cell has the first information indication is performed through at least one of the following:

[0130] a) Explicitly configure whether there is first information; for example, a 1-bit indication.

[0131] b) The serving cell configures SSB to be sent on demand;

[0132] If yes, indicates whether SSB is sent and / or the SSB configuration sent.

[0133] The indication granularity corresponding to the non-serving cell (eg, MO or SSB frequency) is configured separately for a separate block.

[0134] 2. Medium Access Control Element (MAC CE);

[0135] Optionally, the MAC CE is used for at least one of the following:

[0136] 1) Activate the transmission of the reference signal.

[0137] For example, MAC CE is used to activate the sending of SSB.

[0138] 2) Deactivate the transmission of the reference signal.

[0139] For example, MAC CE is used to activate a secondary cell (SCell) and the corresponding SSB transmission. The SSB transmission can be used for fast cell activation, that is, SSB measurement for the terminal in advance, or it can be periodic SSB transmission or on-demand SSB transmission after cell activation.

[0140] 3) Activate the serving cell.

[0141] 4) Deactivate the serving cell.

[0142] 5) Activate the reference signal transmission corresponding to the serving cell.

[0143] 6) Deactivate the reference signal transmission corresponding to the serving cell.

[0144] 7) Activate the transmission of the Aperiodic Tracking Reference Symbol (A-TRS).

[0145] 8) Deactivate the sending of A-TRS.

[0146] For example, MAC CE is used to activate SCell, A-TRS and corresponding SSB transmission.

[0147] For another example, MAC CE is used to activate the sending of SSB and A-TRS.

[0148] Optionally, the cell sending the SSB is indicated by a cell ID in the MAC CE.

[0149] Optionally, a new MAC CE is defined to send the first information.

[0150] Optionally, the old MAC CE is reused, and a new indication field is added or some indication fields are reinterpreted to indicate the first information, for example, the MAC CE used for activating a cell is reused.

[0151] 3. Radio Resource Control (RRC) message.

[0152] Optionally, secondary cell configuration information or secondary cell addition information in the RRC message is used as the first information;

[0153] Alternatively, the secondary cell configuration information or the secondary cell addition information in the RRC message includes the first information.

[0154] Optionally, after receiving the addition information about the secondary cell, the terminal receives the SSB according to a predefined rule or at a predefined location, that is, the SSB is implicitly activated when the RRC adds the SCell, or the network explicitly instructs the activation of the SSB.

[0155] Optionally, the first information is carried as network-side configuration information in the secondary cell configuration information or the secondary cell addition information, that is, the network side explicitly configures or indicates the first information.

[0156] Optionally, the network side sends a first information triggering reference signal, such as sending an SSB, where the first information includes at least one of the following:

[0157] 1) First indication information, used to indicate sending or cancel sending of the reference signal.

[0158] The first indication information, such as 1 bit, is used to indicate the sending / cancellation of SSB.

[0159] Optionally, at this time, the relevant information of SSB is pre-configured or pre-defined by RRC.

[0160] Optionally, the first indication information may be implemented in a bitmap, where the cells in the bitmap correspond to the cells configured by the terminal. In this case, the bit order in the bitmap may be determined based on the size of the cell ID or the order in which the cells are configured.

[0161] 2) Second indication information, used to indicate whether the reference signal is used for at least one of the following: cell activation, cell deactivation, synchronization or measurement.

[0162] The second indication information, such as 1 bit, is used to indicate whether the SSB is used for cell activation / sleep, synchronization or measurement, etc., so as to prevent the terminal from mistakenly thinking that the indication indicates cell activation and starting detection behavior, which causes power consumption, or instructing the terminal to perform measurement and report measurement information, etc.

[0163] Optionally, it may also indicate whether an A-TRS signal will be sent, or, when indicating cell activation, whether an A-TRS signal will also be sent.

[0164] 3) Third indication information, used to indicate whether the reference signal is a cell-defined reference signal or a non-cell-defined reference signal.

[0165] For example, the third indication information indicates whether the SSB is a cell-defined SSB (cell-defining SSB) or a non-cell-defined SSB (non-cell-defining SSB).

[0166] 4) Information about the cell or cell group to which the reference signal is associated.

[0167] Alternatively, the first information directly indicates the cell index. Alternatively, the first information is indicated by a bitmap, where the cells in the bitmap correspond to cells configured / activated by the terminal, wherein the order of the bits corresponds to the configuration / activation order of the cells, or the index order of the cells.

[0168] 5) The measurement object MO, measurement ID or MO group information associated with the reference signal.

[0169] For example, the first information includes the MO / measurement identification (ID) or MO group information associated with the SSB.

[0170] 6) Frequency or frequency group information of the reference signal.

[0171] 7) PCI or PCI group information associated with the reference signal.

[0172] It is understood that 4)-7) illustrate reference signal association granularity. The association granularity may be at least one of a terminal, a terminal group, a beam, a beam group, a serving cell, a serving cell group, a reference signal frequency, a reference signal frequency group, a PCI, a PCI group, a measurement object, and a measurement object group.

[0173] 8) Quasi Co-Location (QCL)

[0174] The QCL information includes at least one of the following: QCL source; QCL type.

[0175] For example, the QCL information indicates the QCL of one SSB / RS from the primary cell (Pcell) or one SSB / RS from one active SCell. It can be understood that the reference signal is quasi-co-located with the indicated reference signal.

[0176] For example, the QCL type includes at least one of QCL-A, QCL-B, QCL-C, and QCL-D.

[0177] For example, the reference signal sent by the network side or one of the reference signals is quasi-co-located with a reference signal of the primary cell.

[0178] 9) Transmission Configuration Indicator (TCI) information.

[0179] 10) Time domain pattern.

[0180] The time domain pattern includes at least one of the following: an index of the reference signal; a starting position of the reference signal; and a receiving time window length of the reference signal.

[0181] 11) Fourth indication information, used to indicate whether the reference signal is sent in repetition or beam sweeping mode.

[0182] For example, the fourth indication information indicates whether the SSB is repetition or beam sweeping. For example, the fourth indication information is indicated by 1 bit.

[0183] It is understood that the repeated transmission here may refer to the SSB repetition of a certain index, or the SSB transmission of certain indices, rather than the transmission of all SSBs. Beam scanning transmission indicates that all SSB indices within the SSB period are transmitted.

[0184] Optionally, the fourth indication information is inferred from at least one of the following information: whether QCL information is indicated; whether it is used for cell activation / sleep; and whether it is sent by group common signaling. For example, if QCL information is indicated, the SSB can be considered to be repetition. If it is sent by group common signaling, the SSB can be considered to be beam sweeping.

[0185] 12) Frequency domain information of the reference signal.

[0186] The frequency domain information of the reference signal includes the position of a synchronization raster or a frequency domain offset value relative to a certain frequency point or a certain signal position. Optionally, the network preconfigures / configures multiple sync rasters, and the indication information indicates one of them.

[0187] 13) A time offset for sending or receiving the reference signal.

[0188] Optionally, the time offset for sending or receiving the reference signal is a time offset relative to a time instant of sending / receiving the first information, or a time offset relative to a time instant of sending / receiving the feedback information. It is understood that this feedback information indicates that the terminal correctly receives the first information.

[0189] For example, if the transmission of the same reference signal is instructed by different base stations, since the timing of different base stations may be different, a time offset is required to unify the reference signal transmission or reception time recognized by the terminal.

[0190] 14) A parameter set of the reference signal.

[0191] For example, the numerology of SSB includes 15 kHz.

[0192] Optionally, the implementation manner of the network-side device sending the reference signal to the terminal in step 202 includes: when a first condition is met, the network-side device sending the reference signal to the terminal, wherein the first condition includes at least one of the following:

[0193] 1) The network-side device activates the secondary cell corresponding to the second frequency;

[0194] 2) The network-side device instructs the secondary cell corresponding to the second frequency to be deactivated;

[0195] 3) a first time interval from when the network-side device sent the last reference signal is greater than or equal to a first threshold;

[0196] For example, the time gap from when the network side device sent the last SSB is greater than the first threshold. It can be understood that the SSB is sent at intervals of a certain period of time.

[0197] 4) The timer associated with sending the reference signal expires; it can be understood that the sending time of the SSB is determined according to the timer.

[0198] 5) The network device switches from sleep mode to active mode. It is understood that the network device may not send SSB in sleep mode. To prevent the terminal from losing synchronization, the SSB is sent for terminal synchronization. Loss of synchronization refers to the loss of uplink / downlink synchronization.

[0199] 6) The network side device detects that a terminal is out of sync;

[0200] 7) The network side device triggers the terminal to report measurement information. It can be understood that the network side needs the cell measurement information of the terminal.

[0201] 8) The network device measures that at least one of a reference signal quality, reference signal strength, reference signal energy, channel quality indicator (CQI), or quality of service (QoS) of at least some terminals is less than a threshold value. Optionally, the threshold value is predefined by a protocol, preconfigured by the network device, or configured by the network device.

[0202] Optionally, the on-demand reference signal sending method provided in an embodiment of the present application also includes: the network side device monitors the feedback information of the terminal on the first frequency, such as a hybrid automatic repeat request confirmation (Hybrid Automatic Repeat reQuest-ACK, HARQ-ACK), and the feedback information is used to indicate whether the terminal correctly receives the first information.

[0203] Optionally, when the received feedback information is ACK, the network side device determines that the terminal correctly receives the first information;

[0204] When the received feedback information is NACK, the network side device determines that the terminal has not correctly received the first information;

[0205] In the case where no ACK feedback information is received, the network side device determines that the terminal has not correctly received the first information;

[0206] In the case that no NACK feedback information is received, the network side device determines that the terminal has correctly received the first information.

[0207] Optionally, the resource location for reporting the feedback information is indicated by DCI or pre-configured by the network side device.

[0208] For example, the resource location of the physical uplink control channel (PUCCH) for reporting HARQ-ACK information is indicated by the DCI.

[0209] Optionally, the PUCCH resource location for reporting HARQ-ACK information is preconfigured by the network-side device. This PUCCH resource is independently configured, or independently configured when used for a NACK-only mechanism. For example, a PUCCH resource for reporting HARQ-ACK information is configured at a time domain location separated by a second time interval from the time when the first information is sent.

[0210] The second time interval between the resource location and the first information is less than or equal to a second threshold, or the second time interval is indicated by DCI, pre-configured by a network-side device, or pre-defined by a protocol.

[0211] Optionally, the network side device in step 202 sends the reference signal to the terminal, including: the network side device sends the reference signal to the terminal on the second frequency starting from the Pth first time unit on the second frequency that overlaps or partially overlaps with the first moment; or, the network side device sends the reference signal to the terminal on the second frequency no earlier than the first moment.

[0212] Optionally, the Pth time unit is the first or last first time unit on the second frequency that overlaps or partially overlaps with the first moment.

[0213] Specifically, the first moment is the moment of the primary cell or the activated cell corresponding to the first frequency. The starting boundary of the first or last first time unit overlaps or partially overlaps with the first time unit.

[0214] The first time is time slot n+k; wherein n is the time when the first information is sent, or the time when feedback information of the terminal is sent or received;

[0215] The k includes at least one of the following: a processing time of feedback information (e.g., HARQ-ACK) on the first frequency; a second processing time; a time offset configured by RRC; a time offset indicated by the first information;

[0216] The second processing time is predefined by a protocol or reported by the terminal.

[0217] It can be understood that the cell time on the first frequency and the second frequency may not be completely synchronized, so the time for the network side device to send SSB on the second frequency needs to be determined according to the first moment determined on the first frequency.

[0218] Optionally, the effectiveness of the information indicated by the first information satisfies at least one of the following:

[0219] 1) The current cycle takes effect immediately;

[0220] 2) It will take effect after the second time unit;

[0221] 3) The transmission time of the first reference signal of the next cycle takes effect;

[0222] 4) It takes effect in the Xth cycle after the current cycle; X is an integer greater than 0.

[0223] For example, after the network side device indicates an adaptive change of SSB, including from not sending SSB to sending SSB, or switching from one SSB pattern to another SSB pattern, the effectiveness of the information indicated by the first information satisfies at least one of the above 1)-4).

[0224] Optionally, when the first information is used to indicate sending an A-TRS, the first information is used to implicitly activate sending of the reference signal, or explicitly activate sending of the reference signal, for example, additionally carrying some reference signal information; or,

[0225] When the first information is used to indicate sending the reference signal, the first information is used to implicitly activate sending of an A-TRS of a serving cell corresponding to the reference signal, or explicitly activate sending of an A-TRS of a serving cell corresponding to the reference signal, for example, carrying an A-TRS ID and / or an SCell index, etc.;

[0226] The first information includes indication information of the A-TRS, such as TRS ID and / or SCell index.

[0227] The reference signal is transmitted before or after the A-TRS is transmitted.

[0228] Optionally, the network side device sends both A-TRS and SSB, or only sends one of them.

[0229] Optionally, in step 202, the network side device sending the reference signal to the terminal includes: when a second condition is met, the network side device sending the reference signal to the terminal on the first frequency or the second frequency according to a default reference signal pattern or a conventional reference signal pattern or a reference signal pattern before the reference signal is sent;

[0230] The second condition includes at least one of the following:

[0231] 1) The serving cell corresponding to the second frequency completes the activation process;

[0232] 2) After the serving cell corresponding to the second frequency is activated for a first preset duration; optionally, the serving cell corresponding to the second frequency is activated by the network side device sending a MAC CE;

[0233] 3) After the network side device sends the first information for a second preset time period;

[0234] 4) After the network side device sends the reference signal for a third preset duration.

[0235] Optionally, the first preset duration, the second preset duration and the third preset duration may be predefined by a protocol and configured or indicated by a network-side device.

[0236] Optionally, in step 202, the network side device sending the reference signal to the terminal includes: after the network side device receives trigger information from the terminal, sending the reference signal to the terminal;

[0237] The trigger information of the terminal includes identification information of the network side device.

[0238] The identification information of the network side device may be a cell ID, or a frequency corresponding to the cell, or a frequency of on-demand SSB, etc., which may be used to identify the network side device.

[0239] It can be understood that when the terminal sends trigger information to trigger the reference signal sending of the target cell, since the target cell may not have been activated yet, or the terminal needs to let the network side know who the triggered object is, it is necessary to carry the identification information of the target cell in the trigger information, such as the cell ID, or the frequency corresponding to the cell, or the frequency of the on demand SSB, etc.

[0240] Optionally, before the network side device sends the reference signal to the terminal, the method further includes: the network side device instructing the terminal that trigger information can be sent.

[0241] It is understood that whether the terminal can send the trigger information for triggering the reference signal depends on whether the network side allows it. The terminal can send the trigger information for triggering the reference signal only after the network side indicates that the terminal can send the relevant trigger information.

[0242] FIG3 is a flow chart of a method for receiving a reference signal according to an embodiment of the present application. The method is performed by a terminal. As shown in FIG3 , the method includes steps 301 and 302, wherein:

[0243] Step 301: A terminal receives first information sent by a network-side device; the first information is used to instruct the network-side device to send a reference signal;

[0244] Step 302: The terminal determines whether to receive the reference signal sent by the network-side device based on the first information.

[0245] For example, the first information indicates sending, and the terminal receives the reference signal.

[0246] For example, if the terminal needs to perform synchronization or measurement, it receives the reference signal, otherwise it does not receive it.

[0247] For another example, if the SSB granularity or sending purpose (such as the terminal ID) indicated by the first information includes or matches the terminal, it is received; otherwise, it is not received.

[0248] For another example, the terminal receives the message at the sending time according to the sending time indicated by the first information, and does not receive the message after the sending time.

[0249] Optionally, the reference signal may include at least one of: a downlink reference signal, a downlink synchronization signal, a synchronization signal, an SSB burst, SSB, and an on-demand reference signal.

[0250] Optionally, the first information includes at least one of the following:

[0251] 1) first indication information, used to indicate whether to send or cancel sending of the reference signal;

[0252] 2) second indication information, used to indicate whether the reference signal is used for at least one of the following: cell activation, cell deactivation, synchronization, or measurement;

[0253] 3) third indication information, used to indicate whether the reference signal is a cell-defined reference signal or a non-cell-defined reference signal;

[0254] 4) information about the cell or cell group associated with the reference signal;

[0255] 5) the MO, measurement ID, or MO group information associated with the reference signal;

[0256] 6) frequency or frequency group information of the reference signal;

[0257] 7) PCI or PCI group information associated with the reference signal;

[0258] 8) QCL information;

[0259] 9)TCI information;

[0260] 10) Time domain pattern;

[0261] 11) fourth indication information, used to indicate whether the reference signal is repeatedly sent or sent using beam scanning;

[0262] 12) frequency domain information of the reference signal;

[0263] 13) a time offset for sending or receiving the reference signal;

[0264] 14) a parameter set of the reference signal;

[0265] The QCL information or TCI information includes at least one of the following: QCL source; QCL type;

[0266] The time domain pattern includes at least one of the following: an index of the reference signal; a starting position of the reference signal; and a receiving time window length of the reference signal.

[0267] In an embodiment of the present application, a terminal receives first information sent by a network side device; the first information is used to instruct the network side device to send a reference signal; the terminal determines whether to receive the reference signal sent by the network side device, thereby realizing on-demand sending of the reference signal, reducing the power consumption of the network side device, and thus achieving network energy saving.

[0268] Optionally, the receiving, by the terminal, the first information sent by the network-side device includes: receiving, by the terminal, the first information sent by the network-side device on a first frequency;

[0269] Optionally, when the terminal determines to receive the reference signal sent by the network side device, the terminal receives the reference signal sent by the network side device.

[0270] Optionally, the terminal receiving the reference signal sent by the network-side device includes:

[0271] It includes: the terminal receives the reference signal sent by the network side device on the first frequency or the second frequency.

[0272] Optionally, the terminal performs a target operation based on the reference signal, where the target operation includes at least one of the following: synchronization, measurement, and reporting.

[0273] Optionally, the method further includes: the terminal sending feedback information on resources corresponding to the first frequency; the feedback information is used to indicate whether the terminal correctly receives the first information.

[0274] When the terminal correctly receives the first information on the first frequency, the feedback information is ACK. For example, when the terminal correctly receives the signaling triggering / indicating SSB transmission on the first carrier, it feeds back ACK on the corresponding PUCCH / PUSCH resource.

[0275] Alternatively, when the terminal fails to correctly receive the first information on the first frequency, the feedback information is NACK.

[0276] Optionally, the terminal receiving the reference signal sent by the network-side device includes at least one of the following:

[0277] The terminal starts detecting the reference signal from a start boundary or an end boundary corresponding to the first moment;

[0278] The terminal starts detecting the reference signal from a second moment;

[0279] The terminal detects the reference signal on the first frequency or the second frequency at a position offset by T time units from a third moment or a fourth moment of the first frequency; wherein T is predefined by a protocol, or indicated by a network-side device, or preconfigured by a network-side device, or configured by a network-side device;

[0280] The terminal receives the reference signal on the second frequency within a first time window.

[0281] Specifically, 1) the terminal starts detecting the reference signal from a start boundary or an end boundary corresponding to a first moment.

[0282] For example, when the cell corresponding to the second frequency is an unknown cell and the terminal receives the first information at a third time instant on the first frequency, the terminal begins detecting the reference signal from a start boundary or an end boundary corresponding to the first time instant. Optionally, performing actions related to CSI reporting / sync on the cell corresponding to the second frequency is in an activated state or begins to be activated when slot n+k is in an activated state.

[0283] Optionally, the first moment is a moment of a primary cell or an activated cell corresponding to the first frequency;

[0284] The start boundary of the first or last first time unit overlaps or partially overlaps with the first moment.

[0285] Optionally, the first moment is time slot n+k;

[0286] Wherein, n is the sending time of the first information, or the sending time or receiving time of the feedback information of the terminal;

[0287] The k includes at least one of the following:

[0288] Processing time of feedback information on the first frequency;

[0289] Second processing time;

[0290] RRC configured time offset;

[0291] a time offset indicated by the first information;

[0292] The second processing time is predefined by a protocol or reported by the terminal.

[0293] 2) The terminal starts detecting the reference signal from the second moment.

[0294] For example, when the cell corresponding to the second frequency is a known cell and the terminal receives the first information at the fourth moment of the first frequency, the terminal starts detecting the reference signal from the second moment.

[0295] Optionally, execution of actions related to CSI report / sync on the cell corresponding to the second frequency is activated in slot n1+k1.

[0296] 3) The terminal starts detecting the reference signal at a position offset by T time units from the third moment or the fourth moment of the first frequency; wherein T is predefined by the protocol, or indicated by the network side device, or preconfigured by the network side device, or configured by the network side device.

[0297] 4) The terminal receives the reference signal at the second frequency within a first time window.

[0298] Optionally, the fourth moment is time slot n1;

[0299] The second moment is time slot n1+k1. Wherein, time slot n1 is the moment of the cell of the second frequency corresponding to the terminal receiving the first information or sending feedback information; time slot n1+k1 is the moment of the cell corresponding to the second frequency;

[0300] The k1 includes at least one of the following: the processing time of the feedback information; a third processing time; wherein the third processing time is predefined by the protocol and is related to the sub-carrier space (SCS) of the cell corresponding to the second frequency.

[0301] Optionally, the starting position of the first time window is determined based on at least one of the following:

[0302] 1) the first moment;

[0303] 2) the second moment;

[0304] 3) The position of the third moment or the fourth moment is offset by T time units;

[0305] 4) The length of the first time window satisfies at least one of the following:

[0306] 5) The length of the first time window is predefined by the protocol, or indicated by the network side device, or preconfigured by the network side device, or configured by the network side device;

[0307] 6) The length of the first time window is related to the time domain pattern of the reference signal;

[0308] 7) The length of the first time window is related to the time domain indication information of the reference signal.

[0309] Optionally, after the terminal receives the reference signal or the first information sent by the network side device, the method further includes at least one of the following:

[0310] 1) the terminal no longer receives the reference signal, no longer measures the reference signal, or no longer performs synchronization based on the reference signal until the next first information is received;

[0311] 2) until the terminal receives the next first information, the terminal receives the reference signal, measures the reference signal, or performs synchronization based on the reference signal according to the period or position pre-configured or configured by the network side device or indicated by the first information;

[0312] 3) In the case where the reference signal or the first information is related to cell activation, the terminal receives the reference signal, measures the reference signal, or performs synchronization based on the reference signal after the cell is activated or after a third time interval of the cell activation according to a period or position preconfigured or configured by the network side device.

[0313] Optionally, the third time interval is, for example, Q, where Q is the time gap from the moment of receiving the last on-demand SSB. Q is predefined by the protocol / preconfigured by the network side / configured by the network side / indicated by the network side. Q is 160 ms or determined by the terminal according to its capabilities.

[0314] 4) In the case where the reference signal or the first information is related to cell deactivation, the terminal receives the reference signal, measures the reference signal, or performs synchronization based on the reference signal after the cell is deactivated or after a fourth time interval of the cell deactivation according to a period or position preconfigured or configured by a network side device.

[0315] Optionally, the first information is indicated according to at least one of the following granularities:

[0316] Serving cell; serving cell group; reference signal frequency; reference signal frequency group; physical cell identifier PCI; PCI group; measurement object; measurement object group; beam; beam group.

[0317] Optionally, the first information is carried by at least one of the following:

[0318] Downlink control information DCI;

[0319] Medium Access Control Unit MAC CE;

[0320] Radio Resource Control RRC message.

[0321] Optionally, the DCI is at least one of the following: terminal-specific DCI, group-general DCI;

[0322] The terminal-specific DCI satisfies at least one of the following:

[0323] The relevant information of the first information in the terminal-specific DCI is configured by the network-side device;

[0324] The terminal-specific DCI includes relevant information of the first information;

[0325] The terminal-specific DCI includes a first indication field, used to indicate the first information;

[0326] The relevant information of the first information includes at least one of the following: the terminal-specific DCI or whether the terminal supports on-demand reference signal transmission; information of a cell or cell group supporting on-demand reference signals; and transmission configuration information of on-demand reference signals;

[0327] The group common DCI satisfies at least one of the following:

[0328] A cyclic redundancy check (CRC) of the group common DCI is scrambled by a radio network temporary identifier that identifies the reference signal;

[0329] One block in the group common DCI corresponds to a specific terminal;

[0330] One block in the group common DCI corresponds to one granularity;

[0331] The group common DCI is used to indicate at least one of the following: sending of the reference signal; triggering sending of the reference signal; cell activation; cell deactivation; synchronization; measurement;

[0332] The group common DCI includes: a second indication field, used to indicate that the group common DCI includes the first information;

[0333] The reference signal of the serving cell corresponding to the group of common DCI is sent on demand.

[0334] Optionally, when one block in the group common DCI corresponds to one granularity, the block includes at least one of the following:

[0335] A third indication field is used to indicate whether to send the reference signal;

[0336] The fourth indication field is used to indicate the type of the reference signal.

[0337] Optionally, the MAC CE is used for at least one of the following:

[0338] activating the sending of the reference signal;

[0339] deactivating the sending of the reference signal;

[0340] Activate the serving cell;

[0341] Deactivate the serving cell;

[0342] activating the reference signal transmission corresponding to the serving cell;

[0343] Deactivating the reference signal transmission corresponding to the serving cell;

[0344] Activate the transmission of the aperiodic tracking reference signal A-TRS;

[0345] Deactivate the sending of the A-TRS.

[0346] Optionally, the secondary cell configuration information or the secondary cell addition information in the RRC message is used as the first information; or,

[0347] The secondary cell configuration information or the secondary cell addition information in the RRC message includes the first information.

[0348] Optionally, the first information includes at least one of the following:

[0349] First indication information, used to instruct sending or cancel sending of the reference signal;

[0350] The second indication information is used to indicate whether the reference signal is used for at least one of the following: cell activation, cell deactivation, synchronization, or measurement;

[0351] third indication information, used to indicate whether the reference signal is a cell-defined reference signal or a non-cell-defined reference signal;

[0352] information of the cell or cell group associated with the reference signal;

[0353] The measurement object MO, measurement ID or MO group information associated with the reference signal;

[0354] Frequency or frequency group information of the reference signal;

[0355] PCI or PCI group information associated with the reference signal;

[0356] Quasi-co-sited QCL information;

[0357] Transmission Configuration Indication TCI information;

[0358] Time domain pattern;

[0359] Fourth indication information, used to indicate whether the reference signal is repeatedly sent or sent using beam scanning;

[0360] Frequency domain information of the reference signal;

[0361] a time offset for sending or receiving the reference signal;

[0362] a parameter set of the reference signal;

[0363] The QCL information or TCI information includes at least one of the following:

[0364] QCL source;

[0365] QCL type;

[0366] The time domain pattern includes at least one of the following:

[0367] an index of the reference signal;

[0368] The starting position of the reference signal;

[0369] The length of the receiving time window of the reference signal.

[0370] Optionally, upon receiving an indication from a network side device that the terminal can send trigger information, the terminal sends the trigger information.

[0371] Optionally, the trigger information includes identification information of a network-side device. It is understood that the identification information of the network-side device here may be information that can be used to identify the network-side device, such as a cell ID, a frequency corresponding to the cell, or an on-demand SSB frequency. The network-side device here may be a network device that instructs the terminal to send trigger information, or may be another network device.

[0372] Here, several specific examples are used to illustrate the reference signal sending method and receiving method provided in the embodiments of the present application.

[0373] Specific example 1: transmission mode of reference signal or on-demand SSB.

[0374] On demand SSB may be that the network side device sends SSB only when triggered by the terminal. Another possibility is that the network side device switches from a state of not sending SSB to a state of sending SSB. Another possibility is that the sending cycle of SSB is changed.

[0375] There are two possible locations for sending On Demand SSB:

[0376] The first is flexible sending, which is determined according to the instructions of the network side device or in combination with the request of the terminal.

[0377] Second, it is sent at a preconfigured timing / position. This means that the network-side device preconfigures candidate timings / positions for on-demand SSB transmission, for example, using a bitmap indicator or determining a starting timing / position based on the Direct Frame Number (DFN) / System Frame Number (SFN) index + symbol index. This timing / position is then repeated at a preconfigured period, representing the candidate on-demand SSB transmission timings / positions. When an on-demand SSB is transmitted, it is always sent at certain timings / positions within the candidate timings / positions.

[0378] When a network device begins sending on-demand SSBs, one possibility is to repeat the transmission N times, for example, four times, according to a certain SSB period, such as 80ms. Another possibility is to gradually increase the SSB transmission period, which saves power while allowing the terminal to maintain synchronization through SSBs as much as possible. For example, the network device begins sending SSBs, first sending them twice with a 20ms period. When sending the SSB for the third or fourth time, the interval between the previous SSB and the previous SSB becomes 40ms, which is equivalent to switching the SSB period to 40ms. Then, according to the same principle, the SSB period is switched to 80ms until it is sent twice with the configured maximum SSB period. Then, the SSB transmission stops, or the SSB transmission continues with the maximum SSB period, such as 640ms.

[0379] Specific example 2: the base station triggers the sending of on-demand SSB before SCell activation.

[0380] A serving cell, such as a Pcell or an active SCell, sends an indication to the terminal, indicating that an inactive SCell is about to transmit an SSB. This process is initiated by the serving cell or an inactive SCell. If the inactive SCell initiates the process, the serving cell is notified via an inter-base station interface or other means. Figure 4 is a schematic diagram of a base station triggering the transmission of an on-demand SSB before SCell activation, as provided in an embodiment of the present application.

[0381] The purpose of SCell sending SSB may be at least one of the following:

[0382] 1. Trigger the terminal to synchronize the SCell;

[0383] 2. Trigger the terminal to perform SCell measurement;

[0384] 3. Activate the inactive SCell.

[0385] Because multiple terminals may configure an SCell as their own SCell and simultaneously activate the same cell as a Pcell or active SCell, an inactivated SCell may send group-common signaling when triggered on-demand by the Pcell or active SCell, instructing multiple UEs to perform related actions. Alternatively, the triggered signaling may be UE-specific signaling. The base station may determine whether to trigger using group-common signaling or UE-specific signaling based on the number of indicated UEs, or it may always trigger using UE-specific / group-common signaling.

[0386] Specific example 3: Sending / receiving time of on-demand SSB.

[0387] Ensuring consistent understanding of the send and receive times of on-demand SSBs between the base station and the user equipment (UE) is crucial for power conservation in both the base station and the user equipment. Otherwise, the base station may need to send more SSBs, wasting energy, or the user equipment may waste energy receiving SSBs where none exist.

[0388] Since SCell may be known or unknown, we can discuss it in two cases.

[0389] When the SCell is known, the terminal knows both the timing of the active cell that sends the signaling and the timing of this SCell, so it can determine the reception time of the SSB in the following way.

[0390] FIG5 is a schematic diagram of the reception timing of an SSB according to an embodiment of the present application. Assuming that the on-demand SSB trigger / indication signaling is sent on the active cell at time n, the SCell sends the SSB in the first slot that overlaps with slot n+k (the starting boundary is located at slot n+k), and the terminal can also receive the SSB in the corresponding slot.

[0391] If the SCell is unknown, the terminal may not have yet acquired the synchronization information for this SCell and cannot determine the slot boundary information on the SCell. In this case, reception can only be performed based on the timing of the active cell. Figure 6 is a second schematic diagram of the reception time of SSB provided in an embodiment of the present application, as shown in Figure 6.

[0392] At this time, the SCell still starts sending SSB on the first slot overlapped by n+k, but the terminal needs to start from the slot boundary corresponding to n+k and try to receive SSB on the SCell. This ensures that the terminal does not miss the transmission of SSB on the SCell.

[0393] Specific example 4: The base station triggers on-demand SSB transmission during the SCell dormancy period.

[0394] Generally speaking, even when an SCell is dormant, it periodically transmits SSBs to facilitate terminal measurements. To save power, the base station can indicate an SSB transmission period or pattern different from that in the active state before the SCell goes into dormancy, or instruct the terminal to receive SSBs based on subsequent signaling, rather than receiving them at a fixed SSB period.

[0395] The SCell indicates the new SSB pattern through group common signaling or UE-specific signaling. This signaling can be used as the signaling to indicate SCell deactivation or included in the current deactivation signaling. The new signaling can carry a time indication, such as a time offset, to indicate when the new SSB pattern / transmission method takes effect.

[0396] Specific example 5: Multiple base stations trigger on-demand SSB transmission in the same SCell.

[0397] There may be multiple terminals configured with the same SCell, and their Pcells or active SCells may be the same, partially the same, or completely different.

[0398] When an SCell triggers on-demand SSB transmission, it faces the challenge of selecting the cell that sends the trigger signaling in order to trigger multiple terminals to receive the SSB according to the signaling instructions. To minimize signaling, a cell that can trigger multiple terminals to receive SSBs should be selected.

[0399] If related signaling is sent via two or more cells, the timing of on-SSB-related signaling may vary due to differences in the number of services or scheduling methods in different cells. Therefore, to ensure that all terminals can correctly receive on-SSB at the appropriate time, the on-SSB trigger signaling needs to indicate an offset so that all terminals can receive SSB at the correct time. Alternatively, it is necessary to ensure that the signaling transmission time of multiple base stations is sufficient after a certain processing interval so that the terminal does not miss the SSB reception. However, this method may result in higher terminal energy consumption because some terminals may start attempting to receive SSBs far in advance.

[0400] Specific example six:

[0401] The reference signal sending method and the corresponding receiving method provided in the embodiments of the present application include the following steps:

[0402] Step 1: The UE receives a measurement configuration, which includes at least one measurement identifier (meas ID). Each meas ID corresponds to a measurement object MO and a reporting configuration.

[0403] According to step 1, the UE is configured with meas ID 1 and meas ID 2.

[0404] Step 2: The UE receives the xth indication information (the xth indication information may be carried in the measurement configuration), and determines that the state of at least one of the measurement objects is an activation / deactivation state.

[0405] For example, the meas ID lists include meas ID 1 and meas ID 2, where one bit in the meas ID 1 configuration indicates that the corresponding MO is not activated, and one bit in meas ID2 indicates that the corresponding MO is activated (according to conventional schemes, if this bit does not appear, the corresponding MO is considered to be activated by default).

[0406] For another example, the network configures the meas ID list in accordance with the related art and additionally configures a new meas ID list, wherein the new meas ID list indicates the disabled meas IDs in the meas ID list. The enabled meas IDs can be understood as corresponding MO enabled.

[0407] For example, the network configures a meas ID list according to the related art, and additionally configures an MO list to indicate the deactivated MO. It can be understood that when an MO is associated with multiple meas IDs, the network does not need to indicate these multiple meas IDs one by one.

[0408] According to step 2, the UE determines that the MO corresponding to meas ID 1 is inactivated and the MO corresponding to meas ID 2 is activated. The UE may start measurement of the MO of meas ID 2.

[0409] Step 3: The UE receives the first information, which is used to activate / deactivate the MO. Taking MAC CE as an example, the first information may include at least one of the following fields:

[0410] LCID field: used to indicate that the MAC CE is used to activate / deactivate MO;

[0411] meas ID field: used to indicate the activation / deactivation status of the MO associated with the meas ID indicated by the meas ID; for example, X bits indicate the meas ID; or N bits perform bit mapping of the meas ID;

[0412] MO field: used to indicate the activation / deactivation status of the MO (in the current measurement framework, the MO also has an ID);

[0413] A / D field: used to indicate whether the MO indicated by the previous meas ID field / MO field is activated or deactivated;

[0414] According to step 3, the UE activates the MO corresponding to meas ID 1; the UE may start MO measurement for meas ID 2.

[0415] Step 4: The UE reports the measurement results according to the reporting configuration of the meas ID.

[0416] According to step 4, the UE reports the measurement result of the MO corresponding to meas ID 1.

[0417] Step 5: The UE receives an RRC reconfiguration message, in which SCell1 is added, and the frequency of SCell1 is the MO frequency corresponding to meas ID 1.

[0418] Optionally, the on-demand SSB in the above specific example may also be expressed as the aforementioned reference signal.

[0419] Specific embodiment seven: sending on-demand SSB before Scell ​​is configured

[0420] When the network-side equipment of the primary cell (Pcell) or other serving cell configures a secondary cell (Scell) for a UE, before adding or deleting the Scell, it can first trigger the transmission of an SSB in the target cell through signaling interaction between base stations. The UE is then instructed to perform measurements on the target cell. The Scell ​​configuration, addition, or deletion is determined based on the measurement results. For specific steps, refer to Example 6.

[0421] Specific embodiment 8: sending on-demand SSB before Scell ​​is activated

[0422] When activating an Scell, whether the Scell ​​is known to the UE affects whether the Scell ​​fast activation procedure can be applied during the activation process. Whether the Scell ​​is in a known state depends on whether the UE has measurement reports about this cell and whether the SSB of this cell is detectable before receiving the activation signaling. Therefore, in order to apply the Scell ​​fast activation procedure to reduce activation latency, the network-side device or the UE can trigger the on-demand SSB transmission of the target cell before sending the activation signaling so that it can meet the prerequisite requirements of the Scell ​​fast activation procedure. If triggered by the network side, the first information triggering the on-demand SSB is sent before the on-demand SSB is sent. The start time of sending the on-demand SSB of the target cell is predefined by the protocol or indicated by the network side. The start time of sending may be before the Scell ​​activation command, for example, before AA mesCycleSCells, before BB DRX cycles, or before the CC time, or it may be implemented by the network side. AA, BB, and CC may be predefined by the protocol, preconfigured by the network side, or indicated by the network side. If the UE triggers the on-demand SSB, it may send an indication to the Pcell or serving cell to trigger the transmission of the target cell's SSB, or it may send the indication directly to the target cell. The UE may trigger the on-demand SSB after reporting the target cell's measurements, after receiving an indication from the network, or before instructing the Pcell or serving cell to activate the target cell. The triggering information may carry the target cell's identification information (ID or frequency). The start time of on-demand SSB transmission may also be as described above.

[0423] In addition, on-demand SSBs can also serve as reference signals during rapid Scell ​​activation, replacing aperiodic TRS (A-TRS). Because A-TRS is designed to perform automatic gain control, time-frequency domain synchronization, and other steps during rapid Scell ​​activation, on-demand SSBs can also achieve this, as the UE no longer needs to blindly search for SSBs. In this case, the on-demand SSB transmission time can be the same as the designed transmission time of A-TRS. Specifically, the time offset relative to the reference time is predefined by the protocol and / or preconfigured by the network (e.g., partly predefined and partly preconfigured by the network) after the network receives the Scell ​​activation command feedback information from the UE, or the UE triggers the transmission via the Scell ​​activation command feedback information.

[0424] The network device or UE can also trigger the transmission of on-demand SSBs in the target cell, using them to perform actions such as automatic gain control (AGC) calibration and time-frequency synchronization to complete the Scell ​​activation process. Compared to periodically transmitted SSBs, the advantage of on-demand SSBs is that the network device or UE can trigger the transmission of SSBs at a suitable location before or after the Scell ​​activation process, allowing the UE to quickly detect the SSBs and complete the aforementioned actions without blind SSB search, thus significantly reducing the latency of the Scell ​​activation process. Furthermore, if the aforementioned actions require more than one SSB, triggering a pattern with a shorter period or overall transmission time using on-demand SSBs also helps reduce the latency of the entire Scell ​​activation process. The starting transmission location of the on-demand SSBs can be no later than or no earlier than the time L when the Scell ​​activation command is sent. L includes at least one of the processing time for the Scell ​​activation command and the processing time for the activation command feedback information. This transmission location can be indicated by indication information sent by the network, triggered by UE information, predefined by the protocol, or preconfigured by the network. This transmission location may be indicated by a reference time and a time offset, or only one of these, with the other predefined by the protocol or preconfigured by the network. The reference time may be the time the activation command is sent or the time the activation command feedback information is sent. On-demand SSBs may be triggered by the network or the UE. The network triggering of on-demand SSBs may be before, after, or at the time the network sends the Scell ​​activation signaling, or before, after the UE receives feedback on the Scell ​​activation signaling. This may also be predefined by the protocol or implemented by the network. Triggering on-demand SSBs before or at the same time as the activation command allows the UE to quickly detect SSBs after receiving the activation command, minimizing latency throughout the entire process. For example, if triggered simultaneously with the SCell activation command, the SCell activation command can be considered to be or contain triggering information for on-demand SSBs. An appropriate on-demand SSB transmission period or starting location allows the UE to detect SSBs directly or with minimal latency after successfully decoding the activation command or sending feedback information, potentially reducing overall latency compared to other methods. Similarly, the time for triggering the on-demand SSB on the UE side may be the time when the Scell ​​activation signaling is received or after the Scell ​​activation signaling is received, or within a certain processing time after the Scell ​​activation signaling is received.

[0425] The reference signal transmission method provided in the embodiment of the present application may be performed by a reference signal transmission apparatus. In the embodiment of the present application, the reference signal transmission apparatus provided in the embodiment of the present application is described by taking the reference signal transmission method performed by the reference signal transmission apparatus as an example.

[0426] FIG7 is a schematic diagram of the structure of a reference signal transmitting apparatus provided in an embodiment of the present application. As shown in FIG7 , the reference signal transmitting apparatus 700 is applied to a network-side device. The reference signal transmitting apparatus 700 includes:

[0427] The first sending module 701 is configured to send first information to the terminal; the first information is used to instruct the network side device to send a reference signal;

[0428] The second sending module 702 is configured to send the reference signal to the terminal.

[0429] In an embodiment of the present application, the network side device sends first information to the terminal, and the first information is used to instruct or trigger the network side device to send a reference signal. Then, the network side device sends a reference signal to the terminal based on the first information, thereby realizing on-demand sending of the reference signal, reducing the power consumption of the network side device, and thus achieving network energy saving.

[0430] Optionally, the first sending module is specifically configured to:

[0431] The network side device sends first information to the terminal at a first frequency;

[0432] The network-side device sending the reference signal to the terminal includes:

[0433] The network-side device sends the reference signal to the terminal at a second frequency.

[0434] Optionally, the first information includes at least one of the following:

[0435] First indication information, used to instruct sending or cancel sending of the reference signal;

[0436] The second indication information is used to indicate whether the reference signal is used for at least one of the following: cell activation, cell deactivation, synchronization, or measurement;

[0437] third indication information, used to indicate whether the reference signal is a cell-defined reference signal or a non-cell-defined reference signal;

[0438] information of the cell or cell group associated with the reference signal;

[0439] The measurement object MO, measurement ID or MO group information associated with the reference signal;

[0440] Frequency or frequency group information of the reference signal;

[0441] PCI or PCI group information associated with the reference signal;

[0442] Quasi-co-sited QCL information;

[0443] Transmission Configuration Indication TCI information;

[0444] Time domain pattern;

[0445] Fourth indication information, used to indicate whether the reference signal is repeatedly sent or sent using beam scanning;

[0446] Frequency domain information of the reference signal;

[0447] a time offset for sending or receiving the reference signal;

[0448] a parameter set of the reference signal;

[0449] The QCL information or TCI information includes at least one of the following:

[0450] QCL source;

[0451] QCL type;

[0452] The time domain pattern includes at least one of the following:

[0453] an index of the reference signal;

[0454] The starting position of the reference signal;

[0455] The length of the receiving time window of the reference signal.

[0456] Optionally, the first information is indicated according to at least one of the following granularities:

[0457] Serving cell; serving cell group; reference signal frequency; reference signal frequency group; physical cell identifier PCI; PCI group; measurement object; measurement object group; beam; beam group.

[0458] Optionally, the first information is carried by at least one of the following:

[0459] Downlink control information DCI;

[0460] Medium Access Control Unit MAC CE;

[0461] Radio Resource Control RRC message.

[0462] Optionally, the DCI is at least one of the following: terminal-specific DCI, group-general DCI;

[0463] The terminal-specific DCI satisfies at least one of the following:

[0464] The relevant information of the first information in the terminal-specific DCI is configured by the network-side device;

[0465] The terminal-specific DCI includes relevant information of the first information;

[0466] The terminal-specific DCI includes a first indication field, used to indicate the first information;

[0467] The relevant information of the first information includes at least one of the following: the terminal-specific DCI or whether the terminal supports on-demand reference signal transmission; information of a cell or cell group supporting on-demand reference signals; and transmission configuration information of on-demand reference signals;

[0468] The group common DCI satisfies at least one of the following:

[0469] A cyclic redundancy check (CRC) of the group common DCI is scrambled by a radio network temporary identifier that identifies the reference signal;

[0470] One block in the group common DCI corresponds to a specific terminal;

[0471] One block in the group common DCI corresponds to one granularity;

[0472] The group common DCI is used to indicate at least one of the following: sending of the reference signal; triggering sending of the reference signal; cell activation; cell deactivation; synchronization; measurement;

[0473] The group common DCI includes: a second indication field, used to indicate that the group common DCI includes the first information;

[0474] The reference signal of the serving cell corresponding to the group of common DCI is sent on demand.

[0475] Optionally, when one block in the group common DCI corresponds to one granularity, the block includes at least one of the following:

[0476] A third indication field is used to indicate whether to send the reference signal;

[0477] The fourth indication field is used to indicate the type of the reference signal.

[0478] Optionally, the MAC CE is used for at least one of the following:

[0479] activating the sending of the reference signal;

[0480] deactivating the sending of the reference signal;

[0481] Activate the serving cell;

[0482] Deactivate the serving cell;

[0483] activating the reference signal transmission corresponding to the serving cell;

[0484] Deactivating the reference signal transmission corresponding to the serving cell;

[0485] Activate the transmission of the aperiodic tracking reference signal A-TRS;

[0486] Deactivate the sending of the A-TRS.

[0487] Optionally, the secondary cell configuration information or the secondary cell addition information in the RRC message is used as the first information; or,

[0488] The secondary cell configuration information or the secondary cell addition information in the RRC message includes the first information.

[0489] Optionally, the first sending module 701 is specifically configured to:

[0490] When a first condition is met, sending the reference signal to the terminal, the first condition including at least one of the following:

[0491] The network side device activates the secondary cell corresponding to the second frequency;

[0492] The network-side device instructs the secondary cell corresponding to the second frequency to be deactivated;

[0493] A first time interval from when the network side device sent a last reference signal is greater than or equal to a first threshold;

[0494] A timer associated with sending the reference signal expires;

[0495] The network side device changes from a sleep state to an active state;

[0496] The network side device detects that a terminal is out of sync;

[0497] The network-side device triggers the terminal to report measurement information.

[0498] Optionally, the device further comprises:

[0499] The processing module is configured to monitor feedback information from the terminal on a first frequency, where the feedback information is used to indicate whether the terminal has correctly received the first information.

[0500] Optionally, the processing module is further configured to:

[0501] When the received feedback information is an acknowledgment ACK, determining that the terminal correctly receives the first information;

[0502] When the received feedback information is a non-acknowledgement (NACK), determining that the terminal has not correctly received the first information;

[0503] In a case where no ACK feedback information is received, determining that the terminal has not correctly received the first information;

[0504] In a case where no NACK feedback information is received, it is determined that the terminal has correctly received the first information.

[0505] Optionally, the resource location for reporting the feedback information is indicated by a DCI or preconfigured by the network side device;

[0506] The second time interval between the resource location and the first information is less than or equal to a second threshold, or the second time interval is indicated by DCI, pre-configured by a network-side device, or pre-defined by a protocol.

[0507] Optionally, the first sending module 701 is specifically configured to:

[0508] Starting from P first time units on a second frequency that overlaps or partially overlaps with the first time instant, sending the reference signal to the terminal on the second frequency; or,

[0509] No earlier than the first time, the reference signal is sent to the terminal on the second frequency.

[0510] Optionally, the first moment is a moment of a primary cell or an activated cell corresponding to the first frequency;

[0511] The start boundary of the Pth first time unit overlaps or partially overlaps with the first moment.

[0512] Optionally, the first moment is time slot n+k;

[0513] Wherein, n is the sending time of the first information, or the sending time or receiving time of the feedback information of the terminal;

[0514] The k includes at least one of the following:

[0515] Processing time of feedback information on the first frequency;

[0516] Second processing time;

[0517] RRC configured time offset;

[0518] a time offset indicated by the first information;

[0519] The second processing time is predefined by a protocol or reported by the terminal.

[0520] Optionally, the effectiveness of the information indicated by the first information satisfies at least one of the following:

[0521] The current cycle takes effect immediately;

[0522] It will take effect after the second time unit;

[0523] The transmission time of the first reference signal of the next cycle takes effect;

[0524] It takes effect in the Xth cycle after the current cycle; X is an integer greater than 0.

[0525] Optionally, when the first information is used to indicate sending an A-TRS, the first information is used to implicitly activate sending of the reference signal, or explicitly activate sending of the reference signal; or,

[0526] In a case where the first information is used to instruct transmission of the reference signal, the first information is used to implicitly activate transmission of an A-TRS of a serving cell corresponding to the reference signal, or explicitly activate transmission of an A-TRS of a serving cell corresponding to the reference signal;

[0527] The first information includes indication information of the A-TRS;

[0528] The reference signal is transmitted before or after the A-TRS is transmitted.

[0529] Optionally, the first sending module 701 is specifically configured to:

[0530] When the second condition is met, sending the reference signal to the terminal according to a default reference signal layout or a conventional reference signal layout on the first frequency or the second frequency;

[0531] The second condition includes at least one of the following:

[0532] The serving cell corresponding to the second frequency completes the activation process;

[0533] After the serving cell corresponding to the second frequency is activated for a first preset time period;

[0534] After the network side device sends the first information for a second preset time;

[0535] After the network side device sends the reference signal for a third preset time period.

[0536] Optionally, the second sending module 702 is specifically configured to send the reference signal to the terminal after receiving the trigger information of the terminal;

[0537] Optionally, the trigger information of the terminal includes identification information of the network side device.

[0538] Optionally, the device further comprises:

[0539] The third sending module is configured to instruct the terminal to send trigger information.

[0540] The reference signal transmitting device in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or chip. The electronic device can be a network-side device, or a device other than a network-side device. For example, the network-side device can include, but is not limited to, the types of network-side devices 12 listed above. Other devices can include servers, network attached storage (NAS), etc., and are not specifically limited in the embodiments of the present application.

[0541] The reference signal sending device provided in the embodiment of the present application can implement the various processes implemented in the method embodiment shown in Figure 2 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0542] FIG8 is a schematic structural diagram of a reference signal receiving apparatus provided in an embodiment of the present application. As shown in FIG8 , the reference signal receiving apparatus 800 is applied to a terminal. The reference signal receiving apparatus 800 includes:

[0543] The receiving module 801 is configured to receive first information sent by a network-side device; the first information is used to instruct the network-side device to send a reference signal;

[0544] The determination module 802 is configured to determine whether to receive the reference signal sent by the network-side device based on the first information.

[0545] Optionally, the receiving module 801 is specifically configured to:

[0546] Receive the first information sent by the network side device on the first frequency.

[0547] Optionally, the receiving module 801 is further configured to:

[0548] In a case where the terminal determines to receive the reference signal sent by the network-side device, the terminal receives the reference signal sent by the network-side device.

[0549] Optionally, the receiving module 801 is specifically configured to:

[0550] Receive the reference signal sent by the network-side device on the first frequency or the second frequency.

[0551] Optionally, the device further comprises:

[0552] A processing module is configured to perform a target operation based on the reference signal, where the target operation includes at least one of the following: synchronization, measurement, and reporting.

[0553] Optionally, the device further comprises:

[0554] a sending module, configured to send feedback information on a resource corresponding to the first frequency; the feedback information is used to indicate whether the terminal correctly receives the first information;

[0555] In a case where the terminal correctly receives the first information on the first frequency, the feedback information is ACK;

[0556] In a case where the terminal fails to correctly receive the first information on the first frequency, the feedback information is NACK.

[0557] Optionally, the receiving module 801 is specifically configured to perform at least one of the following:

[0558] Detecting the reference signal from a start boundary or an end boundary corresponding to a first moment;

[0559] Detecting the reference signal starting from a second moment;

[0560] Starting detection of the reference signal at a position offset by T time units from a third moment or a fourth moment of the first frequency; wherein T is predefined by a protocol, or indicated by a network-side device, or preconfigured by a network-side device, or configured by a network-side device;

[0561] The reference signal is received on the second frequency within a first time window.

[0562] Optionally, the receiving module 801 is specifically configured to:

[0563] When the cell corresponding to the second frequency is an unknown cell and the terminal receives the first information at a third time instant on the first frequency, detecting the reference signal from a start boundary or an end boundary corresponding to the first time instant;

[0564] When the cell corresponding to the second frequency is a known cell and the terminal receives the first information at a fourth time of the first frequency, detection of the reference signal starts from the second time.

[0565] Optionally, the fourth moment is time slot n1;

[0566] The second moment is time slot n1+k1;

[0567] The time slot n1 is the time when the terminal receives the first information or sends the feedback information corresponding to the second frequency cell;

[0568] The time slot n1+k1 is the time of the cell corresponding to the second frequency;

[0569] The k1 includes at least one of the following:

[0570] Processing time of the feedback information;

[0571] Third processing time;

[0572] The third processing time is predefined by the protocol.

[0573] Optionally, the starting position of the first time window is determined based on at least one of the following:

[0574] the first moment;

[0575] the second moment;

[0576] The position of the third moment or the fourth moment is offset by T time units;

[0577] The length of the first time window satisfies at least one of the following:

[0578] The length of the first time window is predefined by a protocol, or indicated by a network side device, or preconfigured by a network side device, or configured by a network side device;

[0579] The length of the first time window is related to the time domain pattern of the reference signal;

[0580] The length of the first time window is related to the time domain indication information of the reference signal.

[0581] Optionally, the processing module is further configured to perform at least one of the following:

[0582] until the next first information is received, the reference signal is no longer received, the reference signal is no longer measured, or synchronization is no longer performed based on the reference signal;

[0583] Until the next first information is received, receiving the reference signal, measuring the reference signal, or performing synchronization based on the reference signal according to a period or position pre-configured or configured by the network side device or indicated by the first information;

[0584] In a case where the reference signal or the first information is related to cell activation, after the cell activation or after a third time interval of the cell activation, according to a period or position preconfigured or configured by a network-side device, receiving the reference signal, measuring the reference signal, or performing synchronization based on the reference signal;

[0585] In the case where the reference signal or the first information is related to cell deactivation, after the cell deactivation or after a fourth time interval of the cell deactivation, the reference signal is received, the reference signal is measured, or synchronization is performed based on the reference signal according to a period or position preconfigured or configured by the network side device.

[0586] Optionally, the first information is indicated according to at least one of the following granularities:

[0587] Serving cell; serving cell group; reference signal frequency; reference signal frequency group; physical cell identifier PCI; PCI group; measurement object; measurement object group.

[0588] Optionally, the first information is carried by at least one of the following:

[0589] Downlink control information DCI;

[0590] Medium Access Control Unit MAC CE;

[0591] Radio Resource Control RRC message.

[0592] Optionally, the DCI is at least one of the following: terminal-specific DCI, group-general DCI;

[0593] The terminal-specific DCI satisfies at least one of the following:

[0594] The relevant information of the first information in the terminal-specific DCI is configured by the network-side device;

[0595] The terminal-specific DCI includes relevant information of the first information;

[0596] The terminal-specific DCI includes a first indication field, used to indicate the first information;

[0597] The relevant information of the first information includes at least one of the following: the terminal-specific DCI or whether the terminal supports on-demand reference signal transmission; information of a cell or cell group supporting on-demand reference signals; and transmission configuration information of on-demand reference signals;

[0598] The group common DCI satisfies at least one of the following:

[0599] A cyclic redundancy check (CRC) of the group common DCI is scrambled by a radio network temporary identifier that identifies the reference signal;

[0600] One block in the group common DCI corresponds to a specific terminal;

[0601] One block in the group common DCI corresponds to one granularity;

[0602] The group common DCI is used to indicate at least one of the following: sending of the reference signal; triggering sending of the reference signal; cell activation; cell deactivation; synchronization; measurement;

[0603] The group common DCI includes: a second indication field, used to indicate that the group common DCI includes the first information;

[0604] The reference signal of the serving cell corresponding to the group of common DCI is sent on demand.

[0605] Optionally, when one block in the group common DCI corresponds to one granularity, the block includes at least one of the following:

[0606] A third indication field is used to indicate whether to send the reference signal;

[0607] The fourth indication field is used to indicate the type of the reference signal.

[0608] Optionally, the MAC CE is used for at least one of the following:

[0609] activating the sending of the reference signal;

[0610] deactivating the sending of the reference signal;

[0611] Activate the serving cell;

[0612] Deactivate the serving cell;

[0613] activating the reference signal transmission corresponding to the serving cell;

[0614] Deactivating the reference signal transmission corresponding to the serving cell;

[0615] Activate the transmission of the aperiodic tracking reference signal A-TRS;

[0616] Deactivate the sending of the A-TRS.

[0617] Optionally, the secondary cell configuration information or the secondary cell addition information in the RRC message is used as the first information; or,

[0618] The secondary cell configuration information or the secondary cell addition information in the RRC message includes the first information.

[0619] Optionally, the first information includes at least one of the following:

[0620] First indication information, used to instruct sending or cancel sending of the reference signal;

[0621] The second indication information is used to indicate whether the reference signal is used for at least one of the following: cell activation, cell deactivation, synchronization, or measurement;

[0622] third indication information, used to indicate whether the reference signal is a cell-defined reference signal or a non-cell-defined reference signal;

[0623] information of the cell or cell group associated with the reference signal;

[0624] The measurement object MO, measurement ID or MO group information associated with the reference signal;

[0625] Frequency or frequency group information of the reference signal;

[0626] PCI or PCI group information associated with the reference signal;

[0627] Quasi-co-sited QCL information;

[0628] Transmission Configuration Indication TCI information;

[0629] Time domain pattern;

[0630] Fourth indication information, used to indicate whether the reference signal is repeatedly sent or sent using beam scanning;

[0631] Frequency domain information of the reference signal;

[0632] a time offset for sending or receiving the reference signal;

[0633] a parameter set of the reference signal;

[0634] The QCL information or TCI information includes at least one of the following:

[0635] QCL source;

[0636] QCL type;

[0637] The time domain pattern includes at least one of the following:

[0638] an index of the reference signal;

[0639] The starting position of the reference signal;

[0640] The length of the receiving time window of the reference signal.

[0641] Optionally, the device further comprises:

[0642] The sending module is used to send trigger information when receiving an indication from the network side device that the terminal can send trigger information.

[0643] Optionally, the trigger information includes identification information of the network side device.

[0644] In an embodiment of the present application, a terminal receives first information sent by a network side device; the first information is used to instruct the network side device to send a reference signal; the terminal determines whether to receive the reference signal sent by the network side device, thereby realizing on-demand sending of the reference signal, reducing the power consumption of the network side device, and thus achieving network energy saving.

[0645] The reference signal receiving device in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component of an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal or other device other than a terminal. For example, the terminal can include but is not limited to the types of terminal 11 listed above, and other devices can include servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0646] The reference signal receiving device provided in the embodiment of the present application can implement the various processes implemented in the method embodiment shown in Figure 3 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0647] The embodiment of the present application also provides a communication device. FIG9 is a schematic diagram of the structure of the communication device provided in the embodiment of the present application. As shown in FIG9 , the communication device 900 includes a processor 901 and a memory 902. The memory 902 stores a program or instruction that can be run on the processor 901. For example, when the communication device 900 is a terminal, the program or instruction is executed by the processor 901 to implement the various steps of the method embodiment shown in FIG3 above, and can achieve the same technical effect. When the communication device 900 is a network-side device, the program or instruction is executed by the processor 901 to implement the various steps of the method embodiment shown in FIG2 above, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0648] The present application also provides a terminal including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps in the method embodiment shown in FIG3 . This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment are applicable to this terminal embodiment and can achieve the same technical effects.

[0649] The present application also provides a terminal. Figure 10 is a schematic diagram of the hardware structure of the terminal provided in the present application. As shown in Figure 10, the terminal 1000 includes, but is not limited to, at least some of the components including a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, a user input unit 1007, an interface unit 1008, a memory 1009, and a processor 1010.

[0650] Those skilled in the art will appreciate that the terminal 1000 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 1010 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG10 does not limit the terminal. The terminal may include more or fewer components than shown, or may combine certain components, or have different component arrangements, which will not be described in detail here.

[0651] It should be understood that in an embodiment of the present application, the input unit 1004 may include a graphics processing unit (GPU) 10041 and a microphone 10042, and the graphics processing unit 10041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1006 may include a display panel 10061, and the display panel 10061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1007 includes a touch panel 10071 and at least one of other input devices 10072. The touch panel 10071 is also called a touch screen. The touch panel 10071 may include two parts: a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and an operating stick, which will not be repeated here.

[0652] In the embodiment of the present application, after receiving downlink data from a network-side device, the RF unit 1001 may transmit the data to the processor 1010 for processing. Furthermore, the RF unit 1001 may send uplink data to the network-side device. Typically, the RF unit 1001 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0653] The memory 1009 can be used to store software programs or instructions and various data. The memory 1009 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, applications or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 1009 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM), and a direct memory bus random access memory (DRRAM). The memory 1009 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0654] Processor 1010 may include one or more processing units. Optionally, processor 1010 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 1010.

[0655] The radio frequency unit 1001 is configured to receive first information sent by a network-side device; the first information is used to instruct the network-side device to send a reference signal;

[0656] The processor 1010 is configured to determine, based on the first information, whether to receive the reference signal sent by the network-side device.

[0657] Optionally, the radio frequency unit 1001 is specifically configured to receive the first information sent by the network side device at a first frequency.

[0658] Optionally, the radio frequency unit 1001 is further configured to:

[0659] In a case where the terminal determines to receive the reference signal sent by the network-side device, the terminal receives the reference signal sent by the network-side device.

[0660] Optionally, the radio frequency unit 1001 is specifically configured to:

[0661] Receive the reference signal sent by the network-side device on the first frequency or the second frequency.

[0662] Optionally, the processor 1010 is further configured to perform a target operation based on the reference signal, where the target operation includes at least one of the following: synchronization, measurement, and reporting.

[0663] Optionally, the radio frequency unit 1001 is further configured to send feedback information on a resource corresponding to the first frequency; the feedback information is used to indicate whether the terminal correctly receives the first information;

[0664] In a case where the terminal correctly receives the first information on the first frequency, the feedback information is ACK;

[0665] In a case where the terminal fails to correctly receive the first information on the first frequency, the feedback information is NACK.

[0666] Optionally, the radio frequency unit 1001 is specifically configured to perform at least one of the following:

[0667] Detecting the reference signal from a start boundary or an end boundary corresponding to a first moment;

[0668] Detecting the reference signal starting from a second moment;

[0669] Starting detection of the reference signal at a position offset by T time units from a third moment or a fourth moment of the first frequency; wherein T is predefined by a protocol, or indicated by a network-side device, or preconfigured by a network-side device, or configured by a network-side device;

[0670] The reference signal is received on the second frequency within a first time window.

[0671] Optionally, the radio frequency unit 1001 is specifically configured to:

[0672] When the cell corresponding to the second frequency is an unknown cell and the terminal receives the first information at a third time instant on the first frequency, detecting the reference signal from a start boundary or an end boundary corresponding to the first time instant;

[0673] When the cell corresponding to the second frequency is a known cell and the terminal receives the first information at a fourth time of the first frequency, detection of the reference signal starts from the second time.

[0674] Optionally, the fourth moment is time slot n1;

[0675] The second moment is time slot n1+k1;

[0676] The time slot n1 is the time when the terminal receives the first information or sends the feedback information corresponding to the second frequency cell;

[0677] The time slot n1+k1 is the time of the cell corresponding to the second frequency;

[0678] The k1 includes at least one of the following:

[0679] Processing time of the feedback information;

[0680] Third processing time;

[0681] The third processing time is predefined by the protocol.

[0682] Optionally, the starting position of the first time window is determined based on at least one of the following:

[0683] the first moment;

[0684] the second moment;

[0685] The position of the third moment or the fourth moment is offset by T time units;

[0686] The length of the first time window satisfies at least one of the following:

[0687] The length of the first time window is predefined by a protocol, or indicated by a network side device, or preconfigured by a network side device, or configured by a network side device;

[0688] The length of the first time window is related to the time domain pattern of the reference signal;

[0689] The length of the first time window is related to the time domain indication information of the reference signal.

[0690] Optionally, the processor 1010 is further configured to perform at least one of the following:

[0691] until the next first information is received, the reference signal is no longer received, the reference signal is no longer measured, or synchronization is no longer performed based on the reference signal;

[0692] Until the next first information is received, receiving the reference signal, measuring the reference signal, or performing synchronization based on the reference signal according to a period or position pre-configured or configured by the network side device or indicated by the first information;

[0693] In a case where the reference signal or the first information is related to cell activation, after the cell activation or after a third time interval of the cell activation, according to a period or position preconfigured or configured by a network-side device, receiving the reference signal, measuring the reference signal, or performing synchronization based on the reference signal;

[0694] In the case where the reference signal or the first information is related to cell deactivation, after the cell deactivation or after a fourth time interval of the cell deactivation, the reference signal is received, the reference signal is measured, or synchronization is performed based on the reference signal according to a period or position preconfigured or configured by the network side device.

[0695] Optionally, the first information is indicated according to at least one of the following granularities:

[0696] Serving cell; serving cell group; reference signal frequency; reference signal frequency group; physical cell identifier PCI; PCI group; measurement object; measurement object group; beam; beam group.

[0697] Optionally, the first information is carried by at least one of the following:

[0698] Downlink control information DCI;

[0699] Medium Access Control Unit MAC CE;

[0700] Radio Resource Control RRC message.

[0701] Optionally, the DCI is at least one of the following: terminal-specific DCI, group-general DCI;

[0702] The terminal-specific DCI satisfies at least one of the following:

[0703] The relevant information of the first information in the terminal-specific DCI is configured by the network-side device;

[0704] The terminal-specific DCI includes relevant information of the first information;

[0705] The terminal-specific DCI includes a first indication field, used to indicate the first information;

[0706] The relevant information of the first information includes at least one of the following: the terminal-specific DCI or whether the terminal supports on-demand reference signal transmission; information of a cell or cell group supporting on-demand reference signals; and transmission configuration information of on-demand reference signals;

[0707] The group common DCI satisfies at least one of the following:

[0708] A cyclic redundancy check (CRC) of the group common DCI is scrambled by a radio network temporary identifier that identifies the reference signal;

[0709] One block in the group common DCI corresponds to a specific terminal;

[0710] One block in the group common DCI corresponds to one granularity;

[0711] The group common DCI is used to indicate at least one of the following: sending of the reference signal; triggering sending of the reference signal; cell activation; cell deactivation; synchronization; measurement;

[0712] The group common DCI includes: a second indication field, used to indicate that the group common DCI includes the first information;

[0713] The reference signal of the serving cell corresponding to the group of common DCI is sent on demand.

[0714] Optionally, when one block in the group common DCI corresponds to one granularity, the block includes at least one of the following:

[0715] A third indication field is used to indicate whether to send the reference signal;

[0716] The fourth indication field is used to indicate the type of the reference signal.

[0717] Optionally, the MAC CE is used for at least one of the following:

[0718] activating the sending of the reference signal;

[0719] deactivating the sending of the reference signal;

[0720] Activate the serving cell;

[0721] Deactivate the serving cell;

[0722] activating the reference signal transmission corresponding to the serving cell;

[0723] Deactivating the reference signal transmission corresponding to the serving cell;

[0724] Activate the transmission of the aperiodic tracking reference signal A-TRS;

[0725] Deactivate the sending of the A-TRS.

[0726] Optionally, the secondary cell configuration information or the secondary cell addition information in the RRC message is used as the first information; or,

[0727] The secondary cell configuration information or the secondary cell addition information in the RRC message includes the first information.

[0728] Optionally, the first information includes at least one of the following:

[0729] First indication information, used to instruct sending or cancel sending of the reference signal;

[0730] The second indication information is used to indicate whether the reference signal is used for at least one of the following: cell activation, cell deactivation, synchronization, or measurement;

[0731] third indication information, used to indicate whether the reference signal is a cell-defined reference signal or a non-cell-defined reference signal;

[0732] information of the cell or cell group associated with the reference signal;

[0733] The measurement object MO, measurement ID or MO group information associated with the reference signal;

[0734] Frequency or frequency group information of the reference signal;

[0735] PCI or PCI group information associated with the reference signal;

[0736] Quasi-co-sited QCL information;

[0737] Transmission Configuration Indication TCI information;

[0738] Time domain pattern;

[0739] Fourth indication information, used to indicate whether the reference signal is repeatedly sent or sent using beam scanning;

[0740] Frequency domain information of the reference signal;

[0741] a time offset for sending or receiving the reference signal;

[0742] a parameter set of the reference signal;

[0743] The QCL information or TCI information includes at least one of the following:

[0744] QCL source;

[0745] QCL type;

[0746] The time domain pattern includes at least one of the following:

[0747] an index of the reference signal;

[0748] The starting position of the reference signal;

[0749] The length of the receiving time window of the reference signal.

[0750] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the method embodiment shown in Figure 3, and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0751] The present application also provides a network-side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiment shown in FIG2 . This network-side device embodiment corresponds to the aforementioned network-side device method embodiment, and each implementation process and implementation method of the aforementioned method embodiment are applicable to this network-side device embodiment and can achieve the same technical effects.

[0752] The embodiment of the present application also provides a network-side device. FIG11 is a schematic diagram of the hardware structure of the network-side device provided in the embodiment of the present application. As shown in FIG11 , the network-side device 1100 includes: an antenna 111, a radio frequency device 112, a baseband device 113, a processor 114, and a memory 115. The antenna 111 is connected to the radio frequency device 112. In the uplink direction, the radio frequency device 112 receives information through the antenna 111 and sends the received information to the baseband device 113 for processing. In the downlink direction, the baseband device 113 processes the information to be sent and sends it to the radio frequency device 112. The radio frequency device 112 processes the received information and sends it through the antenna 111.

[0753] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 113 , which includes a baseband processor.

[0754] The baseband device 113 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in Figure 11, one of the chips is, for example, a baseband processor, which is connected to the memory 115 through a bus interface to call the program in the memory 115 to execute the network device operations shown in the above method embodiment.

[0755] The network side device may further include a network interface 116, which is, for example, a Common Public Radio Interface (CPRI).

[0756] Specifically, the network side device 1100 of the embodiment of the present application also includes: instructions or programs stored in the memory 115 and executable on the processor 114. The processor 114 calls the instructions or programs in the memory 115 to execute the steps of the method embodiment shown in Figure 2 and achieve the same technical effect. To avoid repetition, they will not be elaborated here.

[0757] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned method embodiment are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0758] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0759] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned method embodiment and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0760] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0761] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the various processes of the above-mentioned method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0762] An embodiment of the present application also provides a wireless communication system, including: a terminal and a network-side device, wherein the terminal can be used to execute the steps of the method embodiment shown in Figure 2, and the network-side device can be used to execute the steps of the method embodiment shown in Figure 3.

[0763] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0764] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general-purpose hardware platform, or of course, by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes a number of instructions for enabling a terminal or network-side device to execute the methods described in each embodiment of the present application.

[0765] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of this application and the scope of protection of the claims. These implementation methods are all within the protection of this application.

Claims

1. A method for transmitting a reference signal, wherein, including: The network - side device sends the first information to the terminal; The first information is used to instruct the network - side device to send a reference signal; The network - side device sends the reference signal to the terminal.

2. The method according to claim 1, wherein The network - side device sending the first information to the terminal includes: The network - side device sends the first information to the terminal on a first frequency; The network - side device sending the reference signal to the terminal includes: The network - side device sends the reference signal to the terminal on a second frequency.

3. The method according to claim 1, wherein The network - side device sending the first information to the terminal includes: The network - side device sends the first information to the terminal on a first frequency; The network - side device sending the reference signal to the terminal includes: The network - side device sends the reference signal to the terminal on the first frequency.

4. The method according to any one of claims 1-3, wherein, The first information is indicated according to at least one of the following granularities: serving cell; serving cell group; reference signal frequency point; reference signal frequency point group; physical cell identifier (PCI); PCI group; measurement object; measurement object group; beam; beam group.

5. The method according to any one of claims 1 - 4, wherein, The first information is carried by at least one of the following: downlink control information (DCI); medium access control element (MAC CE); radio resource control (RRC) message.

6. The method according to claim 5, wherein, The DCI is at least one of the following: terminal - specific DCI, group - common DCI; Wherein, the terminal - specific DCI satisfies at least one of the following: The relevant information of the first information in the terminal - specific DCI is configured by the network - side device; The terminal - specific DCI includes the relevant information of the first information; The terminal - specific DCI includes a first indication field for indicating the first information; Wherein, the relevant information of the first information includes at least one of the following: the terminal - specific DCI or whether the terminal supports on - demand reference signal transmission; information of cells or cell groups that support on - demand reference signals; transmission configuration information of on - demand reference signals; The group - common DCI satisfies at least one of the following: The cyclic redundancy check (CRC) of the group - common DCI is scrambled by a radio network temporary identifier (RNTI) that identifies the reference signal; One block in the group - common DCI corresponds to a specific terminal; One block in the group - common DCI corresponds to a granularity; The group - common DCI is used to indicate at least one of the following: the transmission of the reference signal; triggering the transmission of the reference signal; cell activation; cell de - activation; synchronization; measurement; The group - common DCI includes: a second indication field for indicating that the group - common DCI includes the first information; The reference signal of the serving cell corresponding to the group - common DCI is sent in an on - demand manner.

7. The method according to claim 6, wherein, When one block in the group - common DCI corresponds to one of the granularities, the block includes at least one of the following: A third indication field for indicating whether to send the reference signal; A fourth indication field for indicating the type of the reference signal.

8. The method according to claim 5, wherein, The MAC CE is used for at least one of the following: Activating the transmission of the reference signal; Deactivating the transmission of the reference signal; Activating the serving cell; Deactivating the serving cell; Activating the transmission of the reference signal corresponding to the serving cell; Deactivating the transmission of the reference signal corresponding to the serving cell; Activating the transmission of the aperiodic tracking reference signal A-TRS; Deactivating the transmission of the A-TRS.

9. The method according to claim 5, wherein The secondary cell configuration information or secondary cell addition information in the RRC message serves as the first information; or, The secondary cell configuration information or secondary cell addition information in the RRC message includes the first information.

10. The method according to any one of claims 1-9, wherein The first information includes at least one of the following: First indication information for indicating the transmission or cancellation of the reference signal; Second indication information for indicating whether the reference signal is used for at least one of the following: cell activation, cell deactivation, synchronization, or measurement; Third indication information for indicating whether the reference signal is a cell-defined reference signal or a non-cell-defined reference signal; The cell or cell group information associated with the reference signal; The measurement object MO, measurement ID, or MO group information associated with the reference signal; The frequency point or frequency point group information of the reference signal; The PCI or PCI group information associated with the reference signal; Quasi-co-location QCL information; Transmission configuration indication TCI information; Time domain pattern; Fourth indication information for indicating whether the reference signal is transmitted repeatedly or by beam scanning; The frequency domain information of the reference signal; The time offset for transmitting or receiving the reference signal; The parameter set of the reference signal; Wherein, the QCL information or TCI information includes at least one of the following: QCL source; QCL type; The time domain pattern includes at least one of the following: The index of the reference signal; The starting position of the reference signal; The receiving time window length of the reference signal.

11. According to the method according to any one of claims 1-10, wherein The network side device transmits the reference signal to the terminal, including: When a first condition is satisfied, the network side device transmits the reference signal to the terminal, and the first condition includes at least one of the following: The network side device activates the secondary cell corresponding to the second frequency; The network side device instructs the deactivation of the secondary cell corresponding to the second frequency; The first time interval from the network side device transmitting the previous reference signal is greater than or equal to a first threshold; The timer related to transmitting the reference signal expires; The network side device transitions from the sleep state to the active state; The network side device detects that a terminal is out of sync; The network side device triggers the terminal to report measurement information.

12. The method according to any one of claims 1-11, wherein, The method further includes: The network side device listens for the feedback information of the terminal on the first frequency, and the feedback information is used to indicate whether the terminal correctly receives the first information.

13. The method according to claim 12, wherein, The method further includes: When the received feedback information is an acknowledgement ACK, the network side device determines that the terminal correctly receives the first information; When the received feedback information is a negative acknowledgment (NACK), the network device determines that the terminal does not correctly receive the first information; When the feedback information of ACK is not received, the network device determines that the terminal does not correctly receive the first information; When the feedback information of NACK is not received, the network device determines that the terminal correctly receives the first information.

14. The method according to claim 12, wherein, The resource location for reporting the feedback information is indicated by DCI or pre-configured by the network device; Wherein, the second time interval between the resource location and the first information is less than or equal to a second threshold, or the second time interval is indicated by DCI, pre-configured by the network device or predefined by the protocol.

15. The method according to any one of claims 1-14, wherein, The network device sending the reference signal to the terminal includes: The network device starts from the Pth first time unit on a second frequency that overlaps or partially overlaps with the first moment, and sends the reference signal to the terminal on the second frequency; or, The network device sends the reference signal to the terminal on the second frequency not earlier than the first moment.

16. The method according to claim 15, wherein, The first moment is the moment of the primary cell or the active cell corresponding to the first frequency; The start boundary of the Pth first time unit overlaps or partially overlaps with the first moment.

17. The method according to claim 15, wherein, The first moment is time slot n + k; Wherein, n is the sending moment of the first information, or the sending moment or the receiving moment of the feedback information of the terminal; k includes at least one of the following: The processing time of the feedback information on the first frequency; The second processing time; The time offset configured by RRC; The time offset indicated by the first information; Wherein, the second processing time is predefined by the protocol or reported by the terminal.

18. The method according to any one of claims 1-17, wherein, The effectiveness of the information indicated by the first information satisfies at least one of the following: Takes effect immediately in the current period; Starts to take effect after the second time unit; Starts to take effect at the transmission moment of the first reference signal in the next period; Takes effect in the Xth period after the current period; X is an integer greater than 0.

19. The method according to any one of claims 1-18, wherein, When the first information is used to indicate the transmission of A-TRS, the first information is used to implicitly activate the transmission of the reference signal, or explicitly activate the transmission of the reference signal; or, When the first information is used to indicate the transmission of the reference signal, the first information is used to implicitly activate the transmission of A-TRS of the serving cell corresponding to the reference signal, or explicitly activate the transmission of A-TRS of the serving cell corresponding to the reference signal; Wherein, the first information includes the indication information of A-TRS; The transmission time of the reference signal is before or after the transmission time of A-TRS.

20. The method according to any one of claims 1-19, wherein The network device sending the reference signal to the terminal includes: When the second condition is satisfied, the network-side device sends the reference signal to the terminal at the first frequency or the second frequency according to the default reference signal layout or the conventional reference signal layout; The second condition includes at least one of the following: The serving cell corresponding to the second frequency completes the activation process; After a first preset duration since the serving cell corresponding to the second frequency is activated; After a second preset duration since the network-side device sends the first information; After a third preset duration since the network-side device sends the reference signal.

21. The method according to any one of claims 1-19, wherein The network-side device sending the reference signal to the terminal includes: After the network-side device receives the trigger information of the terminal, it sends the reference signal to the terminal.

22. The method according to claim 21, wherein, The trigger information of the terminal includes the identification information of the network-side device.

23. The method according to claim 21 or 22, wherein Before the network-side device sends the reference signal to the terminal, the method further includes: the network-side device instructs the terminal that it can send trigger information.

24. A method for receiving a reference signal, wherein, Including: The terminal receives the first information sent by the network-side device; The first information is used to instruct the network-side device to send a reference signal; The terminal determines whether to receive the reference signal sent by the network-side device according to the first information.

25. The method according to claim 24, wherein, The terminal receiving the first information sent by the network-side device includes: the terminal receives the first information sent by the network-side device at the first frequency.

26. The method according to claim 24 or 25, wherein, Further including: When the terminal determines to receive the reference signal sent by the network-side device, the terminal receives the reference signal sent by the network-side device.

27. The method according to claim 26, wherein The terminal receiving the reference signal sent by the network-side device includes: The terminal receives the reference signal sent by the network-side device at the first frequency or the second frequency.

28. The method according to any one of claims 24-27, wherein The method further includes: The terminal performs target operations based on the reference signal, and the target operations include at least one of the following: synchronization, measurement, reporting.

29. The method according to claim 25, wherein The method further includes: The terminal sends feedback information on the resources corresponding to the first frequency; the feedback information is used to indicate whether the terminal correctly receives the first information; When the terminal correctly receives the first information at the first frequency, the feedback information is ACK; When the terminal does not correctly receive the first information at the first frequency, the feedback information is NACK.

30. The method according to claim 26 or 27, wherein The terminal receiving the reference signal sent by the network-side device includes at least one of the following: The terminal starts detecting the reference signal from the start boundary or the end boundary corresponding to the first moment; The terminal starts detecting the reference signal from the second moment; The terminal starts detecting the reference signal from a position that is offset by T time units from the third moment or the fourth moment of the first frequency; where T is predefined by the protocol, or indicated by the network-side device, or preconfigured by the network-side device, or configured by the network-side device; The terminal receives the reference signal at the second frequency within the first time window.

31. The method according to claim 30, wherein, The terminal starting to detect the reference signal from the start boundary or the end boundary corresponding to the first moment includes: When the cell corresponding to the second frequency is an unknown cell and the terminal receives the first information at the third moment of the first frequency, the terminal starts detecting the reference signal from the start boundary or the end boundary corresponding to the first moment; The terminal starting to detect the reference signal from the second moment includes: When the cell corresponding to the second frequency is a known cell and the terminal receives the first information at the fourth moment of the first frequency, the terminal starts detecting the reference signal from the second moment.

32. The method according to claim 30 or 31, wherein, The fourth moment is time slot n1; The second moment is time slot n1 + k1; Wherein, the time slot n1 is the moment of the second frequency cell corresponding to the terminal receiving the first information or sending feedback information; The time slot n1 + k1 is the moment of the cell corresponding to the second frequency; The k1 includes at least one of the following: The processing time of the feedback information; The third processing time; Wherein, the third processing time is predefined by the protocol.

33. The method according to any one of claims 30 - 32, wherein, The starting position of the first time window is determined based on at least one of the following: The first moment; The second moment; The position obtained by offsetting the third moment or the fourth moment by T time units; The length of the first time window satisfies at least one of the following: The length of the first time window is predefined by the protocol, or indicated by the network - side device, or pre - configured by the network - side device, or configured by the network - side device; The length of the first time window is related to the time - domain pattern of the reference signal; The length of the first time window is related to the time - domain indication information of the reference signal.

34. The method according to any one of claims 24-33, wherein, After the terminal receives the reference signal or the first information sent by the network - side device, it further includes at least one of the following: Until the terminal receives the next first information, the terminal no longer receives the reference signal, or no longer measures the reference signal, or no longer performs synchronization based on the reference signal; Until the terminal receives the next first information, the terminal receives the reference signal, measures the reference signal, or performs synchronization based on the reference signal according to the period or position pre - configured or configured by the network - side device or indicated by the first information; When the reference signal or the first information is related to cell activation, after cell activation or after a third time interval of cell activation, the terminal receives the reference signal, measures the reference signal, or performs synchronization based on the reference signal according to the period or position pre - configured or configured by the network - side device; When the reference signal or the first information is related to cell de - activation, after cell de - activation or after a fourth time interval of cell de - activation, the terminal receives the reference signal, measures the reference signal, or performs synchronization based on the reference signal according to the period or position pre - configured or configured by the network - side device.

35. The method according to any one of claims 24 - 34, wherein, The first information is indicated according to at least one of the following granularities: serving cell; serving cell group; reference signal frequency point; reference signal frequency point group; physical cell identifier PCI; PCI group; measurement object; measurement object group; beam; beam group.

36. The method according to any one of claims 24 - 35, wherein the first information is carried by at least one of the following: downlink control information DCI; medium access control unit MAC CE; radio resource control RRC message.

37. The method according to claim 36, wherein the DCI is at least one of the following: terminal-specific DCI, group common DCI; wherein, the terminal-specific DCI satisfies at least one of the following: the relevant information of the first information in the terminal-specific DCI is configured by the network-side device; the terminal-specific DCI includes the relevant information of the first information; the terminal-specific DCI includes a first indication field for indicating the first information; wherein, the relevant information of the first information includes at least one of the following: the terminal-specific DCI or whether the terminal supports on-demand reference signal transmission; cell or cell group information supporting on-demand reference signals; on-demand reference signal transmission configuration information; the group common DCI satisfies at least one of the following: the cyclic redundancy check CRC of the group common DCI is scrambled by a radio network temporary identity identifying the reference signal; one block in the group common DCI corresponds to a specific terminal; one block in the group common DCI corresponds to a granularity; the group common DCI is used to indicate at least one of the following: the transmission of the reference signal; triggering the transmission of the reference signal; cell activation; cell deactivation; synchronization; measurement; the group common DCI includes: a second indication field for indicating that the group common DCI includes the first information; the reference signal of the serving cell corresponding to the group common DCI is transmitted in an on-demand manner.

38. The method according to claim 37, wherein when one block in the group common DCI corresponds to one granularity, the block includes at least one of the following: a third indication field for indicating whether to transmit the reference signal; a fourth indication field for indicating the type of the reference signal.

39. The method according to claim 36, wherein the MAC CE is used for at least one of the following: activating the transmission of the reference signal; deactivating the transmission of the reference signal; activating the serving cell; deactivating the serving cell; activating the transmission of the reference signal corresponding to the serving cell; deactivating the transmission of the reference signal corresponding to the serving cell; activating the transmission of the aperiodic tracking reference signal A-TRS; deactivating the transmission of the A-TRS.

40. The method according to claim 36, wherein the secondary cell configuration information or secondary cell addition information in the RRC message is used as the first information; or, the secondary cell configuration information or secondary cell addition information in the RRC message includes the first information.

41. The method according to any one of claims 24 - 40, wherein the first information includes at least one of the following: The first indication information, which is used to indicate the transmission or cancellation of the transmission of the reference signal; The second indication information, which is used to indicate whether the reference signal is used for at least one of the following: cell activation, cell deactivation, synchronization, or measurement; The third indication information, which is used to indicate whether the reference signal is a cell-defined reference signal or a non-cell-defined reference signal; The cell or cell group information associated with the reference signal; The measurement object MO, measurement ID, or MO group information associated with the reference signal; The frequency point or frequency point group information of the reference signal; The PCI or PCI group information associated with the reference signal; Quasi-co-location (QCL) information; Transmission Configuration Indicator (TCI) information; Time domain pattern; The fourth indication information, which is used to indicate whether the reference signal is transmitted repetitively or by beam scanning; The frequency domain information of the reference signal; The time offset for transmitting or receiving the reference signal; The parameter set of the reference signal; Wherein, the QCL information or TCI information includes at least one of the following: QCL source; QCL type; The time domain pattern includes at least one of the following: The index of the reference signal; The starting position of the reference signal; The reception time window length of the reference signal.

42. The method according to any one of claims 24-41, wherein, When the terminal receives an indication from the network device that it can send trigger information, the terminal sends the trigger information.

43. The method according to any one of claims 42, wherein, The trigger information includes the identification information of the network device.

44. A transmitting apparatus for a reference signal, wherein, Comprising: The first transmission module, which is used to send the first information to the terminal; The first information is used to indicate that the network device sends a reference signal; The second transmission module, which is used to send the reference signal to the terminal.

45. A receiving device for a reference signal, wherein, Comprising: The reception module, which is used to receive the first information sent by the network device; The first information is used to indicate that the network device sends a reference signal; The determination module, which is used to determine whether to receive the reference signal sent by the network device according to the first information.

46. A network-side device, wherein, Comprising a processor and a memory, the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, it implements the steps of the method for receiving a reference signal according to any one of claims 1 to 23.

47. A network device, comprising a processor and a communication interface, wherein: The communication interface is used to send the first information to the terminal; the first information is used to indicate that the network device sends a reference signal; The processor is used to send the reference signal to the terminal.

48. A terminal, wherein, Comprising a processor and a memory, the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, it implements the steps of the method for sending a reference signal according to any one of claims 24 to 43.

49. A terminal, comprising a processor and a communication interface, wherein: The communication interface is used to receive the first information sent by the network device; The first information is used to indicate that the network device sends a reference signal; The processor is used to determine whether to receive the reference signal sent by the network device according to the first information.

50. A readable storage medium, wherein, The program or instruction is stored on the readable storage medium, and when the program or instruction is executed by the processor, it implements the method for sending a reference signal according to any one of claims 1 to 23, or implements the steps of the method for receiving a reference signal according to any one of claims 24 to 43.

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