Reference signal sending method, receiving method and device

Abstract

The invention discloses a reference signal sending method and device and a reference signal receiving method and device, and belongs to the technical field of wireless communication, and the reference signal sending method of the embodiment of the invention comprises the following steps: network side equipment sends first information to a terminal; the first information is used for indicating the network side equipment to send a reference signal; and the network side equipment sends the reference signal to the terminal.

Description

Technical Field

[0001] This application belongs to the field of wireless communication technologies, and particularly relates to a method and apparatus for transmitting and receiving reference signals. Background Art

[0002] Network energy conservation is of great significance for environmental sustainability, reducing environmental impacts (such as the impact of greenhouse gas emissions on the environment), and saving operating costs. As 5G becomes popular in various industries and regions, and with the widespread application of more advanced services and applications that require very high data rates (such as Extended Range (XR)), the network becomes more dense, using more antennas, larger bandwidths, 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.

[0003] In related technologies, network-side devices (such as base stations) periodically send synchronization signal blocks (Synchronization Signal (SS) / Physical Broadcast Channel (PBCH) block, SSB) to meet the synchronization, measurement, and other requirements of terminals. However, the periodic transmission of SSB is not beneficial to the base station, especially for the energy conservation of the base station of the second cell (such as the secondary cell). Therefore, how to send SSB to achieve the energy conservation goal of network-side devices is a technical problem that needs to be solved. Summary of the Invention

[0004] Embodiments of this application provide a method and apparatus for transmitting and receiving reference signals.

[0005] In a first aspect, a method for transmitting a reference signal is provided, which is executed by a network-side device. The method includes:

[0006] The network-side device sends first information to a terminal; the first information is used to indicate that the network-side device sends a reference signal;

[0007] The network-side device sends the reference signal to the terminal.

[0008] In a second aspect, a method for receiving a reference signal is provided, which is executed by a terminal. The method includes:

[0009] The terminal receives the first information sent by the network-side device; the first information is used to indicate that the network-side device sends a reference signal;

[0010] The terminal determines whether to receive the reference signal sent by the network-side device according to the first information.

[0011] In a third aspect, a reference signal transmitting device is provided, including:

[0012] A first transmitting module, configured to transmit first information to a terminal; the first information is used to instruct the network-side device to transmit a reference signal;

[0013] A second transmitting module, configured to transmit the reference signal to the terminal.

[0014] In a fourth aspect, a reference signal receiving device is provided, including:

[0015] 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 transmit a reference signal;

[0016] A determining module, configured to determine whether to receive the reference signal sent by the network-side device according to the first information.

[0017] In a fifth aspect, a network-side device is provided. The network-side device includes a processor and a memory. The memory stores a program or instruction that can run on the processor. When the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0018] In a sixth aspect, a network-side device is provided, including a processor and a communication interface, where:

[0019] The communication interface is configured to transmit first information to a terminal; the first information is used to instruct the network-side device to transmit a reference signal;

[0020] The processor is configured to transmit the reference signal to the terminal.

[0021] In a seventh aspect, a terminal is provided. The terminal includes a processor and a memory. The memory stores a program or instruction that can run on the processor. When the program or instruction is executed by the processor, the steps of the method described in the second aspect are implemented.

[0022] In an eighth aspect, a terminal is provided, including a processor and a communication interface, where:

[0023] The communication interface is configured to receive first information sent by a network-side device; the first information is used to instruct the network-side device to transmit a reference signal;

[0024] The processor is configured to determine whether to receive the reference signal sent by the network-side device according to the first information.

[0025] In a ninth aspect, a readable storage medium is provided, on which a program or instructions are stored, and when the program or instructions are executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0026] In a tenth aspect, a wireless communication system is provided, including: a terminal and a network-side device, the terminal can be used to execute the steps of the method described in the second aspect, and the network-side device can be used to execute the steps of the method described in the first aspect.

[0027] In an eleventh aspect, a chip is provided, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a program or instructions to implement the method described in the first aspect, or implement the method described in the second aspect.

[0028] In a twelfth aspect, a computer program / program product is provided, the computer program / program product is stored in a storage medium, and the program / program product is executed by at least one processor to implement the steps of the method described in the first aspect, or implement the steps of the method described in the second aspect.

[0029] In an embodiment of the present application, the network-side device sends first information to the terminal, and the first information is used to indicate the transmission of the reference signal of the network-side device. Then, the network-side device sends the reference signal to the terminal, realizing the on-demand transmission of the reference signal, which can reduce the power consumption of the network-side device and thus achieve network energy saving. Description of the Drawings

[0030] Figure 1 A block diagram of a wireless communication system to which an embodiment of the present application can be applied is shown;

[0031] Figure 2 It is a schematic flowchart of a method for sending a reference signal provided by an embodiment of the present application;

[0032] Figure 3 It is a schematic flowchart of a method for receiving a reference signal provided by an embodiment of the present application;

[0033] Figure 4 It is a schematic diagram of a base station triggering the transmission of on demand SSB before SCell activation provided by an embodiment of the present application;

[0034] Figure 5 It is one of the schematic diagrams of the reception time of SSB provided by an embodiment of the present application;

[0035] Figure 6 It is another schematic diagram of the reception time of SSB provided by an embodiment of the present application;

[0036] Figure 7 It is a schematic structural diagram of a reference signal transmitting device provided by an embodiment of the present application;

[0037] Figure 8 It is a schematic structural diagram of a reference signal receiving device provided by an embodiment of the present application;

[0038] Figure 9 It is a schematic structural diagram of a communication device provided by an embodiment of the present application;

[0039] Figure 10 It is a schematic hardware structure diagram of a terminal provided by an embodiment of the present application;

[0040] Figure 11 It is a schematic hardware structure diagram of a network - side device provided by an embodiment of the present application. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present application will be clearly described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope protected by the present application.

[0042] The terms "first", "second", etc. in the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are usually of the same category, and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "or" in the present application means at least one of the connected objects. For example, "A or B" covers three scenarios, namely, Scenario 1: including A and not including B; Scenario 2: including B and not including A; Scenario 3: including both A and B. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0043] The term "indicate" in the present application can be either a direct indication (or an explicit indication) or an indirect indication (or an implicit indication). Among them, a direct indication can be understood as that the sender clearly tells the receiver specific information, operations to be performed, or request results, etc. in the sent indication; an indirect indication can be understood as that the receiver determines the corresponding information according to the indication sent by the sender, or makes a judgment and determines the operations to be performed or request results, etc. according to the judgment result.

[0044] It should be noted that the technology described in the embodiments of this application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, and can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), or other systems. The terms "system" and "network" in the embodiments of this application are often used interchangeably, and the described technology can be used in the above-mentioned systems and radio technologies, as well as in other systems and radio technologies. The following description describes the New Radio (NR) system for example purposes, and the NR term is used in most of the following descriptions, but these technologies can also be applied to systems other than the NR system, such as the 6th th Generation (6G) communication system.

[0045] Figure 1The block diagram of a wireless communication system to which embodiments of the present application can be applied is shown. The wireless communication system includes a terminal 11 and a network-side device 12. Among them, the terminal 11 can be a mobile phone, a tablet personal computer, a laptop computer, a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device, a flight vehicle, a vehicle user equipment (VUE), a shipborne device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, TVs, washing machines, or furniture, etc.), a game console, a personal computer (PC), a teller machine, or a self-service machine, etc. Wearable devices include: smart watches, smart bracelets, smart earphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart ankle chains, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle user equipment can also be referred to as a vehicle terminal, a vehicle controller, a vehicle module, a vehicle component, a vehicle chip, or a vehicle unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application. The network-side device 12 can include an access network device or a core network device. Among them, the access network device can also be referred to as a radio access network (RAN) device, a radio access network function, or a radio access network unit. The access network device can include a base station, a wireless local area network (WLAN) access point (AP), or a wireless fidelity (WiFi) node, etc.Among them, the base station can be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home Node B (HNB), home evolved Node B, Transmission Reception Point (TRP), or some other suitable term in the art. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiments of this application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0046] To facilitate a clearer understanding of the technical solutions provided by the embodiments of this application, some related knowledge is introduced as follows.

[0047] Regarding known and unknown cells:

[0048] If the following conditions are met, the Secondary Cell (SCell) on frequency band FR1 is known:

[0049] 1. During a period equal to max(5 * mesCycleSCell, 5 * DRX cycle) in FR1 before receiving the SCell activation command:

[0050] 1-1. The terminal has sent a valid measurement report of the SCell to be activated;

[0051] 1-2. According to the specified cell identification conditions, the measured SSB remains in a detectable state.

[0052] Among them, mesCycleSCell represents the measurement period of the SCell; DRX refers to Discontinuous Reception;

[0053] 2. According to the specified cell identification conditions, the SSB measured during a period equal to max(5 * mesCycleSCell, 5 * DRX period) also remains detectable during the SCell activation delay period.

[0054] Otherwise, the SCell in FR1 is unknown.

[0055] For the activation of the first SCell in frequency band FR2, the SCell is known if the following conditions are met:

[0056] 1. Before the terminal receives the last activation command for the Physical Downlink Control Channel (PDCCH) Transmission Configuration Indicator (TCI), Physical Downlink Shared Channel (PDSCH) TCI (if applicable), and semi-persistent Channel State Information Reference Signal (CSI-RS) for Channel Quality Indicator (CQI) reporting (if applicable), for a terminal supporting power level 1 / 5, it is equal to 4 s, and for a terminal supporting power levels 2 / 3 / 4, it is equal to 3 s:

[0057] 1-1. The terminal has sent a valid L3 - Reference Signal Received Power (RSRP) measurement report corresponding to the SSB index;

[0058] 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;

[0059] 2. During the period from the L3 - RSRP report to the valid CQI report, according to the specified cell identification conditions, the reported SSB with an index remains detectable, and the TCI state is selected based on one of the latest reported SSB indices.

[0060] Otherwise, the first SCell in FR2 is unknown.

[0061] Next, in combination with the accompanying drawings, through some embodiments and their application scenarios, the method and device for sending and receiving reference signals provided by the embodiments of the present application will be described in detail.

[0062] Figure 2It is a schematic flowchart of a method for transmitting a reference signal provided by an embodiment of the present application. This method is executed by a network-side device, such as Figure 2 shown. The method includes step 201 and step 202, where:

[0063] Step 201: 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;

[0064] Step 202: The network-side device sends the reference signal to the terminal.

[0065] It should be noted that the network-side device may include a network-side device on a satellite, such as a base station on a satellite, or may also include a network-side device on the ground, such as a ground base station.

[0066] Optionally, the reference signal may include at least one of the following: 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 (on demand SSB).

[0067] It can be understood that the on-demand reference signal is a reference signal sent by the network-side device according to the needs of the network side or the needs of the terminal. The network side may switch from a state of not sending to a state of sending, or may switch from one sending state to another sending state, such as different sending periods, or additional reference signal sending, etc.

[0068] Optionally, the network-side device sending the first information to the terminal includes: the network-side device sending the first information to the terminal on a first frequency;

[0069] The implementation manner of the network-side device sending the reference signal to the terminal may include at least one of the following:

[0070] Method 1: The network-side device sends the reference signal to the terminal on a first frequency / first carrier / first serving cell / first serving cell group / master cell / master cell group / primary and secondary cell.

[0071] Method 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 a single carrier or a carrier group composed of multiple carriers.

[0072] It can be understood that the first frequency may also be expressed as concepts such as a first carrier, a first cell, and a first cell group;

[0073] It can be understood that the first frequency may also be expressed as concepts such as a second carrier, a second cell, and a second cell group;

[0074] Among them, the network-side device that sends the first information and the network-side device that sends the reference signal may be the same device or different devices. For example, the network-side device that sends the first information may be the network-side device of the primary cell, while the network-side device that sends the reference signal is the network-side device of the secondary cell.

[0075] In the embodiments of the present application, the network-side device sends the first information to the terminal, and the first information is used to indicate the transmission of the reference signal by the network-side device. Then, the network-side device sends the reference signal to the terminal, realizing the on-demand transmission of the reference signal, which can reduce the power consumption of the network-side device and thus achieve network energy saving.

[0076] Optionally, the reference signal may be pre-defined by the protocol / pre-configured by the network side / configured by the network side.

[0077] Optionally, the first information is indicated according to at least one of the following granularities:

[0078] 1) Serving cell;

[0079] 2) Serving cell group;

[0080] 3) Reference signal frequency point; for example, SSB frequency point or SSB frequency point group.

[0081] 4) Reference signal frequency point group;

[0082] 5) Physical Cell Identifier (PCI);

[0083] 6) PCI group;

[0084] 7) Measurement Object (MO);

[0085] 8) Measurement object group;

[0086] 9) Beam;

[0087] 10) Beam group.

[0088] For example, the first information is indicated according to the following granularity: SSB frequency point + PCI, or SSB frequency point + PCI group.

[0089] Alternatively, the first information is indicated according to the following granularity: a group (SSB frequency point + PCI, or SSB frequency point + PCI group).

[0090] Optionally, the first information is carried by at least one of the following:

[0091] 1. Downlink Control Information (DCI);

[0092] Specifically, the DCI may be at least one of the following:

[0093] 1) UE specific DCI;

[0094] Among them, the UE specific DCI satisfies at least one of the following:

[0095] (1) The relevant information of the first information in the UE specific DCI can be configured by the network side device.

[0096] Optionally, the relevant information of the first information may also be pre-defined by the protocol or pre-configured by the network side. That is, the relevant information of the first information may not be carried in the UE specific DCI.

[0097] (2) The UE specific DCI includes the relevant information of the first information.

[0098] (3) The UE specific DCI includes a first indication field for indicating the first information.

[0099] Among them, the relevant information of the first information includes at least one of the following: the UE specific DCI or whether the UE supports on demand SSB transmission; the cell or cell group information supporting on demand SSB; the transmission configuration information of on demand SSB.

[0100] Example 1: The first information is carried in single-cell uplink scheduling DCI such as DCI 0_0 / 0_1 / 0_2, or carried in single-cell downlink scheduling DCI such as DCI 1_0 / 1_1 / 1_2. It can be scheduling DCI or non-scheduling DCI. Optionally, the first information or the relevant information of the first information satisfies at least one of the following:

[0101] a) The network side configures the relevant information of the first information, including at least one of whether the DCI or the UE supports the on demand SSB function, the indication granularity configuration information of supporting on demand SSB, and the transmission configuration information of on demand SSB, and determines the size of the relevant indication field of the first information in the DCI according to this information.

[0102] b) Validate it as non-scheduling DCI through some fields in the DCI. At this time, repurpose some of these fields to indicate the first information, and determine the mapping relationship between the indication field and the indication granularity according to the relevant information of the first information configured by the network side (for example, the relevant information of the first information configured by the network side in a)).

[0103] Optionally, on demand SSB can also be expressed as the aforementioned reference signal.

[0104] Example 2: The first information is carried in multi-cell scheduling DCI such as DCI 0_3 or 1_3, and can be scheduling DCI or non-scheduling DCI. Optionally, the first information or the relevant information of the first information satisfies at least one of the following

[0105] a) The network side configures the relevant information of the first information, including at least one of whether the DCI or the terminal supports the on demand SSB function, the cell or cell group information that supports on demand SSB, and the configuration information for on demand SSB transmission, and determines the size of the first information field in the DCI according to this information

[0106] b) Validate it as non-scheduling DCI through some fields in the DCI. At this time, repurpose some of these fields to indicate the first information, and determine the mapping relationship between the indication field and the cell / cell group according to the relevant information of the first information configured by the network side (for example, the relevant information of the first information configured by the network side in a)).

[0107] 2) Group common DCI

[0108] Optionally, a new group common DCI is adopted.

[0109] Optionally, on demand SSB can also be expressed as the aforementioned reference signal.

[0110] Among them, the group common DCI satisfies at least one of the following

[0111] (1) The cyclic redundancy check (CRC) of the group common DCI is scrambled by a 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 on demand SSB.

[0112] (2) One block in the group common DCI corresponds to a specific terminal.

[0113] For example, for triggering SSBs with different purposes for different terminals, the indication information is reflected in the block.

[0114] (3) One block in the group common DCI corresponds to a granularity. This granularity is 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 point, a reference signal frequency point group, a physical cell identifier (PCI), a PCI group, a measurement object, and a measurement object group.

[0115] (4) 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; and measurement. For example, this DCI is used to trigger the transmission of the SSB and at the same time indicate the activation of a certain cell.

[0116] Optionally, the group common DCI includes: a second indication field for indicating that the group common DCI includes the first information; and the reference signal of the serving cell corresponding to the group common DCI is transmitted in an on demand manner.

[0117] Optionally, it uniformly indicates that a reference signal has been triggered for the received terminal and / or whether it is used for cell activation / sleep indication, etc. For example, it is determined based on relevant information such as the cell ID.

[0118] Optionally, when one block in the group common DCI corresponds to one such granularity, the block includes at least one of the following:

[0119] A third indication field for indicating whether to transmit the reference signal;

[0120] A fourth indication field for indicating the type of the reference signal.

[0121] For example, 1 bit is used on each block to indicate whether to transmit the reference signal.

[0122] For another example, it indicates which reference signal to transmit on each block. For instance, it is indicated by multiple bits or a bitmap.

[0123] The network side configures / indicates for each user equipment (UE) or some UEs which blocks in the downlink control information (DCI) the UE should read, or configures / indicates the corresponding granularity for each UE or some UEs.

[0124] It should be noted that different blocks may correspond to the same or different indication granularities. For example, one block may correspond to the serving cell, and another block may correspond to the mobile origin (MO) ID or the synchronization signal block (SSB) frequency.

[0125] Optionally, reuse the existing group common DCI, such as DCI 2_9.

[0126] Specifically, it is determined whether there is an indication of the first information in the corresponding serving cell through at least one of the following:

[0127] a) Explicitly configure whether there is the first information; for example, indicated by 1 bit.

[0128] b) The serving cell is configured such that the SSB is sent in an on-demand manner.

[0129] If so, indicate whether to send the SSB and / or the configured SSB.

[0130] For the indication granularity corresponding to a non-serving cell (such as MO, or SSB frequency), a separate block is configured separately.

[0131] 2. Medium Access Control Control Element (MAC CE);

[0132] Optionally, the MAC CE is used for at least one of the following:

[0133] 1) Activate the transmission of the reference signal.

[0134] For example, the MAC CE is used to activate the transmission of the SSB.

[0135] 2) Deactivate the transmission of the reference signal.

[0136] For example, the MAC CE is used to activate the transmission of the secondary cell (SCell) and the corresponding SSB. The transmission of this SSB can be used for fast cell activation, that is, the SSB measured in advance for the UE, or the periodic SSB transmission or on-demand SSB transmission after cell activation.

[0137] 3) Activate the serving cell.

[0138] 4) Deactivate the serving cell.

[0139] 5) Activate the transmission of the reference signal corresponding to the serving cell.

[0140] 6) Deactivate the transmission of the reference signal corresponding to the serving cell.

[0141] 7) Activate the transmission of the Aperiodic Tracking Reference Symbol (A-TRS).

[0142] 8) Deactivate the transmission of the A-TRS.

[0143] For example, the MAC CE is used to activate the SCell, the A-TRS, and the corresponding SSB transmission.

[0144] For another example, the MAC CE is used to activate the SSB and the A-TRS transmission.

[0145] Optionally, the cell that transmits the SSB is indicated by the cell ID in the MAC CE.

[0146] Optionally, a new MAC CE is defined to transmit the first information.

[0147] Optionally, reuse the old MAC CE, and add a new indication field or re-interpret some indication fields to indicate the first information. For example, reuse the MAC CE for activating the cell.

[0148] 3. Radio Resource Control (RRC) message.

[0149] Optionally, the secondary cell configuration information or the secondary cell addition information in the RRC message serves as the first information;

[0150] Or, the secondary cell configuration information or the secondary cell addition information in the RRC message includes the first information.

[0151] Optionally, when the terminal receives the addition information about the secondary cell, it receives the SSB according to predefined rules or at a predefined position, that is, when the RRC adds the SCell, the SSB is implicitly activated, or the network explicitly indicates to activate the SSB.

[0152] 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.

[0153] Optionally, the network side sends first information to trigger the transmission of a reference signal, such as the transmission of an SSB. The first information includes at least one of the following:

[0154] 1) A first indication information for indicating the transmission or cancellation of the reference signal.

[0155] The first indication information, such as 1 bit, is used to indicate the transmission / cancellation of the SSB.

[0156] Optionally, the relevant information of the SSB is pre-configured or predefined by the RRC at this time.

[0157] Optionally, the specific form of the first indication information can be implemented by a bitmap. The cells in the bitmap correspond to the cells configured for the terminal. At this time, the bit order in the bitmap can be determined according to the size of the cell ID or the cell configuration order, etc.

[0158] 2) A 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.

[0159] The second indication information, such as 1 bit, is used to indicate whether the SSB is used for cell activation / sleep or for synchronization or measurement, etc., so as to prevent the terminal from mistakenly thinking that it is instructed to activate the cell and start the detection behavior, resulting in power consumption, or instructing the terminal to perform measurement, and thus reporting measurement information, etc.

[0160] Optionally, it can also indicate whether the A-TRS signal will be sent, or, when indicating cell activation, indicate whether the A-TRS signal will also be sent.

[0161] 3) A third indication information for indicating whether the reference signal is a cell-defined reference signal or a non-cell-defined reference signal.

[0162] 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).

[0163] 4) The cell or cell group information associated with the reference signal.

[0164] Optionally, the first information directly indicates the Index of the cell. Or, the first information is indicated by a bitmap. The cells in the bitmap correspond to the cells configured / activated by the terminal, where the order of the bits corresponds to the configuration / activation order of the cells or the index order of the cells.

[0165] 5) The measurement object MO, measurement ID, or MO group information associated with the reference signal.

[0166] For example, the first piece of information includes the MO / measurement identifier (ID) associated with the SSB or MO group information.

[0167] 6) The frequency point or frequency point group information of the reference signal.

[0168] 7) The PCI or PCI group information associated with the reference signal.

[0169] It can be understood that 4)-7) illustrate the association granularity of the reference signal. 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 point, a reference signal frequency point group, a PCI, a PCI group, a measurement object, and a measurement object group.

[0170] 8) Quasi Co-Location (QCL).

[0171] Among them, the QCL information includes at least one of the following: QCL source; QCL type.

[0172] For example, the QCL information indicates the QCL with one SSB / RS from the Primary cell (Pcell) (QCL with one SSB / RS from Pcell), or the QCL with one SSB / RS from one active Secondary cell (one SSB / RS from one active SCell). It can be understood that the reference signal is quasi co-located with a certain indicated reference signal.

[0173] For example, the QCL type includes at least one of QCL-A, QCL-B, QCL-C, and QCL-D.

[0174] For example, the reference signal sent by the network side or one of the reference signals is quasi co-located with a certain reference signal of the primary cell.

[0175] 9) Transmission Configuration Indicator (TCI) information.

[0176] 10) Time domain pattern.

[0177] 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.

[0178] 11) The fourth indication information, used to indicate that the reference signal is sent by repetition or beam sweeping.

[0179] For example, the fourth indication information indicates that the SSB is repetition or beam sweeping. For instance, the fourth indication information is indicated by 1 bit.

[0180] It can be understood that the repeated transmission here can refer to the SSB repetition of a certain index, or the SSB transmission of some indices, rather than transmitting all SSBs. The beam sweeping transmission indicates that all SSB indices within the SSB period are transmitted.

[0181] 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; whether it is transmitted by group common signaling. For example, if QCL information is indicated, it can be considered that the SSB is repetition. If it is transmitted by group common signaling, it can be considered that the SSB is beam sweeping transmission.

[0182] 12) The frequency domain information of the reference signal.

[0183] The frequency domain information of the reference signal includes the position of the synchronization raster (Sync raster) or the frequency domain offset value relative to a certain frequency point or a certain signal position. Optionally, the network pre-configures / configures multiple sync rasters, and one of them is indicated by the indication information.

[0184] 13) The time offset for transmitting or receiving the reference signal.

[0185] Optionally, the time offset for transmitting or receiving the reference signal is the time offset relative to the transmission / reception time of the first information, or the time offset relative to the transmission / reception time of the feedback information. It can be understood that this feedback information indicates that the terminal correctly receives the first information.

[0186] For example, if the same reference signal is indicated to be transmitted by different base stations, since the timings of different base stations may be different, a time offset is required at this time to unify the transmission or reception time of the reference signal recognized by the terminal.

[0187] 14) The parameter set of the reference signal.

[0188] For example, the parameter set (numerology) of the SSB, such as including 15 kHz.

[0189] Optionally, the implementation manner in which the network device sends the reference signal to the terminal in step 202 includes: when a first condition is met, the network device sends the reference signal to the terminal, where the first condition includes at least one of the following:

[0190] 1) The network device activates a secondary cell corresponding to a second frequency;

[0191] 2) The network device instructs the deactivation of a secondary cell corresponding to a second frequency;

[0192] 3) The first time interval from when the network device sent the previous reference signal is greater than or equal to a first threshold;

[0193] For example, the time gap from when the network device sent the previous SSB is greater than the first threshold. It can be understood that the SSB is sent at regular intervals.

[0194] 4) A timer related to sending the reference signal expires; it can be understood that the sending time of the SSB is determined according to the timer.

[0195] 5) The network device transitions from the sleep state to the active state; it can be understood that the network device may not send the SSB in the sleep state. To avoid possible out-of-step of the terminal, the SSB is sent for terminal synchronization. The out-of-step refers to the terminal losing the uplink / downlink synchronization state.

[0196] 6) The network device detects that a terminal is out of step;

[0197] 7) The network device triggers the terminal to report measurement information; it can be understood that the network needs the cell measurement information of the terminal.

[0198] 8) The network device measures that at least one of the reference signal quality or reference signal strength or reference signal energy or 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 the protocol, or preconfigured by the network device, or configured by the network device.

[0199] Optionally, the method for sending on-demand reference signals provided in the embodiments of the present application further includes: the network device listens for feedback information of the terminal on a first frequency, such as Hybrid Automatic Repeat reQuest-ACK (HARQ-ACK), and the feedback information is used to indicate whether the terminal correctly receives the first information.

[0200] Optionally, when the received feedback information is ACK, the network-side device determines that the terminal correctly receives the first information;

[0201] When the received feedback information is NACK, the network-side device determines that the terminal does not correctly receive the first information;

[0202] When the ACK feedback information is not received, the network-side device determines that the terminal does not correctly receive the first information;

[0203] When the NACK feedback information is not received, the network-side device determines that the terminal correctly receives the first information.

[0204] Optionally, the resource location for reporting the feedback information is indicated by DCI or pre-configured by the network-side device.

[0205] For example, the resource location of the Physical Uplink Control Channel (PUCCH) for reporting HARQ-ACK information is indicated by DCI.

[0206] Optionally, the PUCCH resource location for reporting HARQ-ACK information is pre-configured by the network-side device. This PUCCH resource is independently configured, or independently configured when used for the NACK-only mechanism. For example, the PUCCH resource for reporting HARQ-ACK information is configured at a time domain position that is separated from the transmission moment of the first information by a second time interval.

[0207] 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-side device, or predefined by the protocol.

[0208] Optionally, the network-side device sending the reference signal to the terminal in step 202 includes: the network-side 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-side device sends the reference signal to the terminal on the second frequency not earlier than the first moment.

[0209] 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.

[0210] Specifically, the first moment is the moment of the primary cell or the active cell corresponding to the first frequency. The start boundary of the first or last first time unit overlaps or partially overlaps with the first time unit.

[0211] The first moment is time slot n + k, where n is the transmission moment of the first information, or the transmission moment or reception moment of the feedback information of the terminal.

[0212] k includes at least one of the following: the processing time of feedback information (such as HARQ-ACK) on the first frequency; the second processing time; the time offset configured by RRC; the time offset indicated by the first information.

[0213] Wherein, the second processing time is predefined by the protocol or reported by the terminal.

[0214] It can be understood that the cell times on the first frequency and the second frequency may not be completely synchronized. Therefore, the time for the network-side device to send the SSB on the second frequency needs to be determined according to the first moment determined on the first frequency.

[0215] Optionally, the effectiveness of the information indicated by the first information satisfies at least one of the following:

[0216] 1) It takes effect immediately in the current period.

[0217] 2) It starts to take effect after the second time unit.

[0218] 3) It starts to take effect at the transmission moment of the first reference signal in the next period.

[0219] 4) It takes effect in the Xth period after the current period; X is an integer greater than 0.

[0220] For example, after the network-side device indicates the adaptive change of the SSB, including changing from not sending the SSB to sending the 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).

[0221] Optionally, 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, such as additionally carrying some information of the reference signal; or,

[0222] 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, such as carrying A-TRS ID and / or SCell index, etc.;

[0223] Wherein, the first information includes the indication information of the A-TRS, such as TRS ID and / or SCell index.

[0224] The transmission time of the reference signal is before or after the transmission time of the A-TRS.

[0225] Optionally, the network device transmits both the A-TRS and the SSB, or only one of them.

[0226] Optionally, the network device transmitting the reference signal to the terminal in step 202 includes: when the second condition is satisfied, the network device transmits the reference signal to the terminal at the first frequency or the second frequency according to the default reference signal pattern or the conventional reference signal pattern or the reference signal pattern before the transmission of the reference signal;

[0227] Wherein, the second condition includes at least one of the following:

[0228] 1) The serving cell corresponding to the second frequency completes the activation process;

[0229] 2) After a first preset duration since the serving cell corresponding to the second frequency is activated; optionally, the serving cell corresponding to the second frequency is activated by the network device transmitting a MAC CE;

[0230] 3) After a second preset duration since the network device transmits the first information;

[0231] 4) After a third preset duration since the network device transmits the reference signal.

[0232] Optionally, the first preset duration, the second preset duration, and the third preset duration can be predefined by the protocol, configured or indicated by the network device.

[0233] Optionally, the network device transmitting the reference signal to the terminal in step 202 includes: after the network device receives the trigger information from the terminal, transmitting the reference signal to the terminal;

[0234] Wherein, the trigger information of the terminal includes the identification information of the network device.

[0235] Wherein, the identification information of the network device can be the cell ID, or the frequency point corresponding to the cell, or the frequency point of the on demand SSB, etc., which can be used to identify the network device.

[0236] It can be understood that when the terminal sends trigger information to trigger the transmission of the reference signal of the target cell, since the target cell may not be activated yet, or the terminal needs to let the network side know who the trigger 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 point corresponding to the cell, or the frequency point of the on demand SSB, etc.

[0237] Optionally, 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.

[0238] It can be understood that whether the terminal can send the trigger information for the trigger reference signal depends on whether the network side allows it. After the network side instructs the terminal that it can send the relevant trigger information, the terminal can send the trigger information for the trigger reference signal.

[0239] Figure 3 It is a schematic flowchart of a method for receiving a reference signal provided by an embodiment of the present application. This method is executed by a terminal. As Figure 3 shown, this method includes step 301 and step 302, where:

[0240] Step 301: The terminal receives first information sent by the network-side device; the first information is used to instruct the network-side device to send a reference signal;

[0241] Step 302: The terminal determines whether to receive the reference signal sent by the network-side device according to the first information.

[0242] For example, if the first information indicates transmission, the terminal receives the reference signal.

[0243] For example, if the terminal needs to perform synchronization or measurement, it receives the reference signal, otherwise it does not receive it.

[0244] For another example, if the SSB granularity or transmission purpose indicated by the first information (such as having the terminal ID) includes or matches the terminal, it receives, otherwise it does not receive.

[0245] For another example, the terminal receives at the transmission time according to the transmission time indicated by the first information, and does not receive it if it exceeds the transmission time.

[0246] 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.

[0247] Optionally, the first information includes at least one of the following:

[0248] 1) A first indication information, used to indicate the transmission or cancellation of the reference signal;

[0249] 2) A 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;

[0250] 3) A third indication information, used to indicate whether the reference signal is a cell-defined reference signal or a non-cell-defined reference signal;

[0251] 4) Cell or cell group information associated with the reference signal;

[0252] 5) MO, measurement ID, or MO group information associated with the reference signal;

[0253] 6) Frequency point or frequency point group information of the reference signal;

[0254] 7) PCI or PCI group information associated with the reference signal;

[0255] 8) QCL information;

[0256] 9) TCI information;

[0257] 10) Time-domain pattern;

[0258] 11) Fourth indication information for indicating that the reference signal is sent repeatedly or by beam scanning;

[0259] 12) Frequency-domain information of the reference signal;

[0260] 13) Time offset for sending or receiving the reference signal;

[0261] 14) Parameter set of the reference signal;

[0262] Wherein, the QCL information or TCI information includes at least one of the following: QCL source; QCL type;

[0263] The time-domain pattern includes at least one of the following: index of the reference signal; start position of the reference signal; reception time window length of the reference signal.

[0264] In an embodiment of the present application, the terminal receives first information sent by the network-side device; the first information is used to indicate that the network-side device sends a reference signal; the terminal determines whether to receive the reference signal sent by the network-side device, realizing on-demand sending of the reference signal, which can reduce the power consumption of the network-side device, thereby achieving network energy saving.

[0265] Optionally, 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 a first frequency;

[0266] 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.

[0267] Optionally, the terminal receiving the reference signal sent by the network-side device includes:

[0268] The method includes: the terminal receives the reference signal sent by the network-side device on the first frequency or the second frequency.

[0269] 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.

[0270] Optionally, the method further includes: the terminal sends feedback information on the resource corresponding to the first frequency; the feedback information is used to indicate whether the terminal correctly receives the first information.

[0271] 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 that triggers / indicates the SSB transmission on the first carrier, it feeds back ACK on the corresponding PUCCH / PUSCH resource.

[0272] Alternatively, when the terminal does not correctly receive the first information on the first frequency, the feedback information is NACK.

[0273] Optionally, the terminal receiving the reference signal sent by the network-side device includes at least one of the following:

[0274] The terminal starts detecting the reference signal from the start boundary or the end boundary corresponding to the first moment;

[0275] The terminal starts detecting the reference signal from the second moment;

[0276] The terminal starts detecting the reference signal on the first frequency or the second frequency 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 pre-configured by the network-side device, or configured by the network-side device;

[0277] The terminal receives the reference signal on the second frequency within the first time window.

[0278] Specifically, 1) The terminal starts detecting the reference signal from the start boundary or the end boundary corresponding to the first moment.

[0279] For example, 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. Optionally, performing actions related to CSI report / sync on the cell corresponding to the second frequency is in an active state or starts to be activated at slot n + k.

[0280] Optionally, the first moment is the moment of the primary cell or the active cell corresponding to the first frequency;

[0281] The start boundary of the first or last first time unit overlaps or partially overlaps with the first moment.

[0282] Optionally, the first moment is time slot n + k;

[0283] Wherein, n is the transmission moment of the first information, or the transmission moment or reception moment of the feedback information of the terminal;

[0284] The k includes at least one of the following:

[0285] The processing time of the feedback information on the first frequency;

[0286] The second processing time;

[0287] The time offset configured by RRC;

[0288] The time offset indicated by the first information;

[0289] Wherein, the second processing time is predefined by the protocol or reported by the terminal.

[0290] 2) The terminal starts detecting the reference signal from the second moment.

[0291] 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 on the first frequency, the terminal starts detecting the reference signal from the second moment.

[0292] Optionally, performing actions related to CSI report / sync on the cell corresponding to the second frequency is active in slot n1 + k1.

[0293] 3) The terminal starts detecting the reference signal from the position offset by T time units from the third or fourth moment on the first frequency; wherein, the 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.

[0294] 4) The terminal receives the reference signal on the second frequency within the first time window.

[0295] Optionally, the fourth moment is time slot n1;

[0296] The second moment is time slot n1 + k1. Wherein, the time slot n1 is the moment of the cell corresponding to the second frequency when the terminal receives the first information or sends the feedback information; the time slot n1 + k1 is the moment of the cell corresponding to the second frequency;

[0297] 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 and is related to the sub-carrier space (SCS) of the cell corresponding to the second frequency.

[0298] Optionally, the starting position of the first time window is determined based on at least one of the following:

[0299] 1) The first moment;

[0300] 2) The second moment;

[0301] 3) The position of the third moment or the fourth moment offset by T time units;

[0302] 4) The length of the first time window satisfies at least one of the following:

[0303] 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;

[0304] 6) The length of the first time window is related to the time domain pattern of the reference signal;

[0305] 7) The length of the first time window is related to the time domain indication information of the reference signal.

[0306] Optionally, 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:

[0307] 1) 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;

[0308] 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 preconfigured or configured by the network side device or indicated by the first information;

[0309] 3) In the case where the reference signal or the first information is related to cell activation, after the cell is activated or after the 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 preconfigured or configured by the network side device.

[0310] Optionally, the third time interval is, for example, Q, where Q is the time gap from the time of the last received 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.

[0311] 4) When 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 according to the period or location preconfigured or configured by the network side device after cell deactivation or after a fourth time interval of cell deactivation.

[0312] Optionally, the first information is indicated according to at least one of the following granularities:

[0313] 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.

[0314] Optionally, the first information is carried by at least one of the following:

[0315] downlink control information DCI;

[0316] medium access control unit MAC CE;

[0317] radio resource control RRC message.

[0318] Optionally, the DCI is at least one of the following: terminal-specific DCI, group-common DCI;

[0319] Wherein, the terminal-specific DCI satisfies at least one of the following:

[0320] The information related to the first information in the terminal-specific DCI is configured by the network side device;

[0321] The terminal-specific DCI includes the information related to the first information;

[0322] The terminal-specific DCI includes a first indication field for indicating the first information;

[0323] Wherein, the information related to 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 on the cell or cell group supporting on demand reference signal; transmission configuration information of the on demand reference signal;

[0324] The group-common DCI satisfies at least one of the following:

[0325] The cyclic redundancy check (CRC) of the group common DCI is scrambled by a radio network temporary identifier (RNTI) that identifies the reference signal;

[0326] One block in the group common DCI corresponds to a specific terminal;

[0327] One block in the group common DCI corresponds to a granularity;

[0328] The group common DCI is used to indicate at least one of the following: transmission of the reference signal; triggering the transmission of the reference signal; cell activation; cell deactivation; synchronization; measurement;

[0329] The group common DCI includes: a second indication field for indicating that the group common DCI includes the first information;

[0330] The reference signal of the serving cell corresponding to the group common DCI is transmitted on demand.

[0331] Optionally, when one block in the group common DCI corresponds to one granularity, the block includes at least one of the following:

[0332] A third indication field for indicating whether to transmit the reference signal;

[0333] A fourth indication field for indicating the type of the reference signal.

[0334] Optionally, the MAC CE is used for at least one of the following:

[0335] Activating the transmission of the reference signal;

[0336] Deactivating the transmission of the reference signal;

[0337] Activating the serving cell;

[0338] Deactivating the serving cell;

[0339] Activating the transmission of the reference signal corresponding to the serving cell;

[0340] Deactivating the transmission of the reference signal corresponding to the serving cell;

[0341] Activating the transmission of the aperiodic tracking reference signal (A-TRS);

[0342] Deactivating the transmission of the A-TRS.

[0343] Optionally, the secondary cell configuration information or secondary cell addition information in the RRC message is used as the first information; or,

[0344] The secondary cell configuration information or secondary cell addition information in the RRC message includes the first information.

[0345] Optionally, the first information includes at least one of the following:

[0346] The first indication information, which is used to indicate the transmission or cancellation of the reference signal;

[0347] 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;

[0348] 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;

[0349] The cell or cell group information associated with the reference signal;

[0350] The measurement object MO, measurement ID, or MO group information associated with the reference signal;

[0351] The frequency point or frequency point group information of the reference signal;

[0352] The PCI or PCI group information associated with the reference signal;

[0353] Quasi-co-location (QCL) information;

[0354] Transmission Configuration Indication (TCI) information;

[0355] Time domain pattern;

[0356] The fourth indication information, which is used to indicate whether the reference signal is transmitted repeatedly or by beam scanning;

[0357] The frequency domain information of the reference signal;

[0358] The time offset for transmitting or receiving the reference signal;

[0359] The parameter set of the reference signal;

[0360] Wherein, the QCL information or TCI information includes at least one of the following:

[0361] QCL source;

[0362] QCL type;

[0363] The time domain pattern includes at least one of the following:

[0364] The index of the reference signal;

[0365] The starting position of the reference signal;

[0366] The reception time window length of the reference signal.

[0367] Optionally, when receiving an indication from the network device that the terminal is allowed to send trigger information, the terminal sends the trigger information.

[0368] Optionally, the trigger information includes the identification information of the network device. It can be understood that the identification information of the network device here can be the cell ID, or the frequency point corresponding to the cell, or the frequency point of the on demand SSB, etc., which can be used to identify the network device. The network device here can be the network device that indicates that the terminal is allowed to send trigger information, or other network devices.

[0369] Here, several specific examples are used to illustrate the method for sending and receiving reference signals provided in the embodiments of the present application.

[0370] Specific Example 1: Transmission mode of reference signal or on demand SSB.

[0371] One possibility for on demand SSB is that the network device only sends SSB when triggered by the terminal. Another possibility is that the network device changes from a state where it never sends SSB to a state where it sends SSB. There is also a possibility of changing the transmission period of SSB.

[0372] There are two possibilities for the transmission location of on demand SSB:

[0373] One is flexible transmission, determined according to the indication of the network device or in combination with the request of the terminal.

[0374] The other is to send at a preconfigured timing / position, that is, the network device preconfigures a candidate timing / position for on demand SSB transmission. For example, it is indicated by a bitmap, or a starting timing / position is determined by a Direct Frame Number (DFN) / System Frame Number (SFN) index + symbol index, and then repeated according to a preconfigured period, which is the candidate transmission timing / position of on demand SSB. When on demand SSB is sent, it is always sent at some timing / positions within the candidate timing / position.

[0375] When the network-side device starts to send on demand SSB, one possibility is to repeat the transmission N times, e.g., 4 times, according to a certain SSB period, e.g., 80 ms. Another possibility is to gradually increase the SSB transmission period, which can achieve the effect of power saving while enabling the terminal to maintain synchronization through the SSB as much as possible. For example, when the network-side device starts to send SSB, it first sends twice with a period of 20 ms. When sending the SSB for the third or fourth time, the interval from the previous SSB becomes 40 ms, which is equivalent to switching the SSB period to 40 ms and then sending twice. Then, according to the same principle, the SSB period is switched to 80 ms until it is sent twice with the configured maximum SSB period, and then the SSB transmission stops, or it has been sent with the maximum SSB period, e.g., 640 ms, all the time.

[0376] Specific Example 2: The base station triggers the transmission of on demand SSB before the activation of the SCell.

[0377] A serving cell, such as a Pcell or an active SCell, sends an indication to the terminal, indicating that an SCell in the deactivated state is about to send SSB. This process is initiated by this serving cell or the SCell in the deactivated state. If it is initiated by the SCell in the deactivated state, it notifies the serving cell through means such as the interface between base stations. Figure 4 It is a schematic diagram of the base station triggering the transmission of on demand SSB before the activation of the SCell provided by the embodiment of the present application, as Figure 4 shown.

[0378] The purpose of the SCell sending SSB may be at least one of the following:

[0379] 1. Trigger the terminal to synchronize the SCell;

[0380] 2. Trigger the terminal to measure the SCell;

[0381] 3. Activate this SCell in the deactivated state.

[0382] Since multiple terminals may configure an SCell as their own SCell and activate the same cell as the Pcell or active SCell simultaneously, an unactivated SCell may send group common signaling when triggering ondemand transmission through the Pcell or active SCell, and simultaneously instruct multiple UEs to perform related actions. In addition, the triggered signaling may also be UE specific signaling. The base station may determine whether to trigger through group common signaling or UE specific signaling based on the number of UEs indicated, or may always trigger through UE specific / group common signaling.

[0383] Specific Example 3: Transmission / Reception Time of On Demand SSB.

[0384] How to make the understanding of the transmission time / reception time of on demand SSB consistent between the base station and the UE is crucial for power saving of both the base station and the terminal. Otherwise, the base station may send more SSBs, resulting in waste of energy, or the terminal may waste energy receiving where the SSB does not exist.

[0385] Since the SCell may be known or unknown, two cases can be discussed.

[0386] When the SCell is known, the terminal knows the timing of the active cell sending the signaling and the timing of this SCell at the same time, so the reception time of the SSB can be determined in the following way.

[0387] Figure 5 It is one of the schematic diagrams of the reception time of the SSB provided by the embodiments of the present application, as Figure 5 shown. Assume that the time when the on demand SSB trigger / indication signaling is sent on the Active cell is time n, then the SCell sends the SSB on the first slot that overlaps with n + k (the starting boundary is located in slot n + k), and the terminal can also receive the SSB on the corresponding slot.

[0388] If the SCell is unknown, the terminal may not have obtained the synchronization information of this SCell at this time, and thus cannot determine the slot boundary information on the SCell, etc. In this case, only the reception can be performed according to the timing of the active cell. Figure 6 It is the second schematic diagram of the reception time of the SSB provided by the embodiments of the present application, as Figure 6 shown.

[0389] At this time, the SCell still starts to transmit the SSB on the first slot where n + k overlaps, but the terminal needs to start from the slot boundary corresponding to n + k and attempt to receive the SSB on the SCell, so as to ensure that the terminal will not miss the transmission of the SSB on the SCell.

[0390] Specific Example 4: The base station triggers the on-demand SSB transmission during the SCell dormant period.

[0391] Generally speaking, the SCell will transmit the SSB periodically even during dormancy to facilitate the terminal to perform measurements. From the perspective of power saving, before dormancy, the base station can indicate an SSB transmission with a different period or pattern from the active state, or instruct the terminal to perform the reception of the SSB according to the subsequent received signaling, rather than receiving the SSB according to a certain SSB period.

[0392] The SCell indicates a new SSB pattern through group common signaling or UE specific signaling. This signaling can be used as a signaling to indicate the activation of the SCell, or be 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 mode takes effect.

[0393] Specific Example 5: Multiple base stations trigger the on-demand SSB transmission of the same SCell.

[0394] Since 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.

[0395] When the SCell wants to trigger the on-demand SSB transmission, in order to trigger multiple terminals to receive the on-demand SSB according to the signaling together, it may face the problem of selecting the cell to send the trigger signaling. In order to send as few signals as possible, the cell that can trigger multiple terminals to receive the SSB should be selected as much as possible.

[0396] If related signaling is sent through two or more cells, due to different service quantities or scheduling methods of different cells, there may be differences in the time of sending signaling related to on demand SSB. Therefore, in order to ensure that all terminals can correctly receive on demand SSB at the appropriate time, the triggering signaling of on demand SSB needs to indicate an offset so that all terminals can receive SSB at the correct time. Or it is necessary to ensure that the signaling sending times of multiple base stations are all sufficient after a certain processing interval so that the terminal does not miss the reception of SSB. However, this method may cause higher power consumption of the terminal because some terminals may start trying to receive SSB much earlier.

[0397] Specific Example Six:

[0398] The method for sending a reference signal and the corresponding receiving method provided by the embodiments of the present application include the following steps:

[0399] Step 1: The UE receives a measurement configuration, and the measurement configuration includes at least one measurement identifier (meas ID), and each meas ID corresponds to a measurement object MO and a reporting configuration.

[0400] According to Step 1, the UE is configured with meas ID 1 and meas ID 2.

[0401] Step 2: The UE receives the xth indication information (the xth indication information may be carried in the measurement configuration), and determines the state of at least one of the measurement objects as the active / deactivated state.

[0402] For example, the meas ID lists include meas ID 1 and meas ID 2, where there is 1 bit in the meas ID 1 configuration indicating that the corresponding MO is not activated, and there is 1 bit in the meas ID 2 indicating that the corresponding MO is activated (according to the conventional solution, it can also be considered that if this 1 bit does not appear, the corresponding MO is considered to be activated by default).

[0403] Another example is that the network configures the meas ID list in the existing manner and additionally configures a new meas ID list, and the new meas ID list indicates the meas IDs that are not enabled in the meas ID list. The enabled meas ID can be understood as the corresponding MO being enabled.

[0404] Another example is that the network configures the meas ID list in the existing manner and additionally configures an MO list for indicating the deactivated MOs. Then it can be understood that in the case where one MO is associated with multiple meas IDs, the network does not need to indicate these multiple meas IDs one by one.

[0405] According to step 2, the UE determines that the MO corresponding to meas ID 1 is not activated, and the MO corresponding to meas ID 2 is activated. The UE may initiate the measurement of the MO of meas ID 2.

[0406] Step 3: The UE receives the first information, and the first information is used to activate / deactivate the MO. Taking the MAC CE as an example, the first information may include at least one of the following fields:

[0407] LCID field: used to indicate that the MAC CE is used to activate / deactivate the MO;

[0408] 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;

[0409] MO field: used to indicate the activation / deactivation status of the MO (in the current measurement framework, the MO also has an ID);

[0410] A / D field: used to indicate whether the MO indicated by the previous meas ID field / MO field is activated or deactivated;

[0411] According to step 3, the UE activates the MO corresponding to meas ID1; the UE may initiate the measurement of the MO of meas ID 2.

[0412] Step 4: The UE reports the measurement result according to the reporting configuration of the meas ID.

[0413] According to step 4, the UE reports the measurement result of the MO corresponding to meas ID 1.

[0414] Step 5: The UE receives the RRC reconfiguration message, and the RRC reconfiguration message adds SCell1, and the frequency point of the SCell1 is the frequency point of the MO corresponding to meas ID 1.

[0415] Optionally, in the above specific example, the on demand SSB may also be expressed as the aforementioned reference signal.

[0416] Specific Embodiment Seven: Transmission of on demand SSB before the Scell is configured

[0417] When the network side device of the primary cell Pcell or other serving cells configures a secondary cell Scell for the UE, before adding or deleting the Scell, the transmission of the SSB of the target cell can be triggered by signaling interaction between base stations first, and then the UE is instructed to perform measurements on the target cell. The configuration of the Scell, addition or deletion is determined according to the measurement results. The specific steps can refer to Embodiment Six.

[0418] Specific Embodiment Eight: Transmission of on demand SSB before the Scell is activated

[0419] When activating the Scell, whether the Scell is in a known state for the UE affects whether the Scell fast activation procedure can be applied to the activation process. And whether it is in a known state depends on whether the UE has measurement reports on this cell before receiving the activation signaling and whether the SSB of this cell is in a detectable state. Therefore, in order to apply the Scell fast activation procedure to reduce the activation delay, the network side device or the UE can trigger the transmission of the on demand SSB of the target cell before sending the activation signaling, so that it can meet the prerequisite requirements of the Scell fast activation procedure. If it is triggered by the network side, the first information for triggering the on demand SSB is sent before the on demand SSB is transmitted. The starting transmission time of the on demand SSB of the target cell is predefined by the protocol or indicated by the network side. The starting transmission time may be before the Scell activation command, for example, before AA mesCycleSCell, before BB DRX cycles, or before CC time, or implemented by the network side. AA, BB, and CC can be predefined by the protocol, preconfigured by the network side, or indicated by the network side. If it is triggered by the UE, the UE may send indication information to the Pcell or serving cell to trigger the transmission of the SSB of the target cell, or directly send indication information to the target cell. The UE may trigger after the measurement report of the target cell, or after receiving the indication information from the network side, or before instructing the Pcell or serving cell to activate the target cell. At this time, the trigger information may carry the identification information (ID or frequency point) of the target cell. At this time, the starting transmission time of the on demand SSB may also be as described above.

[0420] In addition, on demand SSB can also be used as a reference signal during the rapid activation process of the Scell, that is, to replace the aperiodic TRS (A-TRS). Since the A-TRS is designed to perform steps such as automatic gain control and time-frequency domain synchronization during the rapid activation process of the Scell, on-demand SSB can also achieve this because the UE no longer needs to blindly search for SSB. At this time, the transmission time of the on-demand SSB can be the same as the designed transmission time of the A-TRS. That is, at the moment after a certain time of processing (activation command processing time and feedback processing time) after the Scell activation command and HARQ-ACK are sent, the time offset value relative to the reference moment is predefined by the protocol and / or preconfigured by the network side (for example, part is predefined and part is preconfigured by the network side). In this case, it can be considered that the on demand SSB is (automatically) triggered for transmission after the network side receives the Scell activation command feedback information from the UE, or is triggered for transmission by the UE through the Scell activation command feedback information.

[0421] The network-side device or UE can also trigger the on-demand SSB transmission of the target cell, and use the on-demand SSB to complete actions such as automatic gain control (AGC) calibration and time-frequency synchronization, so as to complete the Scell activation procedure. Compared with the periodically transmitted SSB, the advantage of the on-demand SSB is that the network-side device or UE can trigger the SSB transmission at a more appropriate position before and after the Scell procedure is activated, so that the UE can quickly detect the SSB and complete the above actions, without having to blindly search for the SSB, thus greatly reducing the latency of the Scell activation process. At the same time, when more than one SSB is required for the above actions, triggering a pattern with a shorter period or a shorter overall transmission time through the on-demand SSB is also beneficial to reducing the latency of the entire Scell activation process. The starting transmission position of the on-demand SSB can be no later than the time L when the Scell activation command is sent or no earlier than the time L after the Scell activation command is sent. L includes at least one of the processing time of the Scell activation command and the processing time of the activation command feedback information. This transmission position can be indicated by the indication information sent by the network side, or the trigger information of the UE, or predefined by the protocol, or preconfigured by the network side. This transmission position may be indicated by a reference time and a time offset value, or only one of them, and the other is predefined by the protocol or preconfigured by the network side. The possible reference times are the transmission time of the activation command or the transmission time of the activation command feedback information. The on-demand SSB may be triggered by the network side or the UE. The time when the network side triggers the on-demand SSB can be the time when the network side sends the Scell activation signaling, or after or before that, or the time when the UE feeds back the receipt of the Scell activation signaling, or after that, or predefined by the protocol, or implemented by the network side. Triggering the on-demand transmission before or at the same time as the activation command is sent can enable the UE to quickly detect the SSB after receiving the activation command, making the latency of the entire process as small as possible. For example, if it is triggered at the same time as the SCell activation command, the SCell activation command can be considered to be or contain the trigger information of the on-demand SSB. An appropriate on-demand SSB transmission period or transmission starting position can enable the UE to directly detect the SSB or detect the SSB with a very small latency after successfully decoding the activation command or sending the feedback information, and the overall latency may be smaller than other methods. Similarly, the time when the UE side triggers the on-demand SSB can be the time when it receives the Scell activation signaling, or after receiving the Scell activation signaling, or within a certain processing time after receiving the Scell activation signaling.

[0422] The method for transmitting a reference signal provided by an embodiment of this application may be executed by a reference signal transmitting device. In the embodiments of this application, taking the reference signal transmitting device executing the reference signal transmitting method as an example, the reference signal transmitting device provided by the embodiments of this application is described.

[0423] Figure 7 is a schematic structural diagram of the reference signal transmitting device provided by an embodiment of this application. As Figure 7 shown, the reference signal transmitting device 700 is applied to a network-side device. The reference signal transmitting device 700 includes:

[0424] A first transmitting module 701, configured to transmit first information to a terminal; the first information is used to instruct the network-side device to transmit a reference signal;

[0425] A second transmitting module 702, configured to transmit the reference signal to the terminal.

[0426] In the embodiments of this application, the network-side device transmits first information to the terminal, and the first information is used to instruct or trigger the reference signal transmission of the network-side device. Then, the network-side device transmits the reference signal to the terminal based on the first information, realizing on-demand transmission of the reference signal, which can reduce the power consumption of the network-side device and thus achieve network energy saving.

[0427] Optionally, the first transmitting module is specifically configured to:

[0428] The network-side device transmits the first information to the terminal at a first frequency;

[0429] The network-side device transmitting the reference signal to the terminal includes:

[0430] The network-side device transmits the reference signal to the terminal at a second frequency.

[0431] Optionally, the first information includes at least one of the following:

[0432] First indication information, used to indicate the transmission or cancellation of the reference signal;

[0433] 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;

[0434] Third indication information, used to indicate whether the reference signal is a cell-defined reference signal or a non-cell-defined reference signal;

[0435] The cell or cell group information associated with the reference signal;

[0436] The measurement object MO, measurement ID, or MO group information associated with the reference signal;

[0437] The frequency point or frequency point group information of the reference signal;

[0438] The physical cell identifier (PCI) or PCI group information associated with the reference signal;

[0439] Quasi - co - location (QCL) information;

[0440] Transmission configuration indication (TCI) information;

[0441] Time - domain pattern;

[0442] Fourth indication information, used to indicate that the reference signal is transmitted repeatedly or by beam scanning;

[0443] The frequency - domain information of the reference signal;

[0444] The time offset for transmitting or receiving the reference signal;

[0445] The parameter set of the reference signal;

[0446] Wherein, the QCL information or TCI information includes at least one of the following:

[0447] QCL source;

[0448] QCL type;

[0449] The time - domain pattern includes at least one of the following:

[0450] The index of the reference signal;

[0451] The starting position of the reference signal;

[0452] The reception time window length of the reference signal.

[0453] Optionally, the first information is indicated according to at least one of the following granularities:

[0454] 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.

[0455] Optionally, the first information is carried by at least one of the following:

[0456] Downlink control information (DCI);

[0457] Medium access control element (MAC CE);

[0458] Radio resource control (RRC) message.

[0459] Optionally, the DCI is at least one of the following: UE - specific DCI, group - common DCI;

[0460] Among them, the terminal-specific DCI satisfies at least one of the following:

[0461] The relevant information of the first information in the terminal-specific DCI is configured by the network-side device;

[0462] The terminal-specific DCI includes the relevant information of the first information;

[0463] The terminal-specific DCI includes a first indication field for indicating the first information;

[0464] Among them, 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; the cell or cell group information supporting on-demand reference signals; the transmission configuration information of on-demand reference signals;

[0465] The group-common DCI satisfies at least one of the following:

[0466] The cyclic redundancy check CRC of the group-common DCI is scrambled by a radio network temporary identity identifying the reference signal;

[0467] One block in the group-common DCI corresponds to a specific terminal;

[0468] One block in the group-common DCI corresponds to a granularity;

[0469] 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;

[0470] The group-common DCI includes: a second indication field for indicating that the group-common DCI includes the first information;

[0471] The reference signal of the serving cell corresponding to the group-common DCI is transmitted in an on-demand manner.

[0472] Optionally, when one block in the group-common DCI corresponds to one granularity, the block includes at least one of the following:

[0473] A third indication field for indicating whether to transmit the reference signal;

[0474] A fourth indication field for indicating the type of the reference signal.

[0475] Optionally, the MAC CE is used for at least one of the following:

[0476] Activating the transmission of the reference signal;

[0477] Deactivate the transmission of the reference signal;

[0478] Activate the serving cell;

[0479] Deactivate the serving cell;

[0480] Activate the transmission of the reference signal corresponding to the serving cell;

[0481] Deactivate the transmission of the reference signal corresponding to the serving cell;

[0482] Activate the transmission of the aperiodic tracking reference signal A-TRS;

[0483] Deactivate the transmission of the A-TRS.

[0484] Optionally, the secondary cell configuration information or secondary cell addition information in the RRC message is used as the first information; or,

[0485] The secondary cell configuration information or secondary cell addition information in the RRC message includes the first information.

[0486] Optionally, the first transmission module 701 is specifically configured to:

[0487] When a first condition is met, send the reference signal to the terminal, where the first condition includes at least one of the following:

[0488] The network side device activates the secondary cell corresponding to the second frequency;

[0489] The network side device instructs the deactivation of the secondary cell corresponding to the second frequency;

[0490] The first time interval from the network side device sending the previous reference signal is greater than or equal to a first threshold;

[0491] The timer related to sending the reference signal expires;

[0492] The network side device transitions from the sleep state to the active state;

[0493] The network side device detects that a terminal is out of sync;

[0494] The network side device triggers the terminal to report measurement information.

[0495] Optionally, the device further includes:

[0496] A processing module, configured to listen for the feedback information of the terminal on the first frequency, where the feedback information is used to indicate whether the terminal correctly receives the first information.

[0497] Optionally, the processing module is further configured to:

[0498] When the received feedback information is an acknowledgement ACK, it is determined that the terminal has correctly received the first information;

[0499] When the received feedback information is a non - acknowledgement NACK, it is determined that the terminal has not correctly received the first information;

[0500] When no ACK feedback information is received, it is determined that the terminal has not correctly received the first information;

[0501] When no NACK feedback information is received, it is determined that the terminal has correctly received the first information.

[0502] Optionally, the resource location for reporting the feedback information is indicated by DCI or pre - configured by the network - side device;

[0503] 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 - side device, or predefined by the protocol.

[0504] Optionally, the first sending module 701 is specifically configured to:

[0505] Start from the P first time units on a second frequency that overlaps or partially overlaps with the first moment, and send the reference signal to the terminal on the second frequency; or,

[0506] Send the reference signal to the terminal on the second frequency not earlier than the first moment.

[0507] Optionally, the first moment is the moment of the primary cell or the active cell corresponding to the first frequency;

[0508] The start boundary of the Pth first time unit overlaps or partially overlaps with the first moment.

[0509] Optionally, the first moment is the time slot n + k;

[0510] Wherein, n is the sending moment of the first information, or the sending moment or receiving moment of the feedback information of the terminal;

[0511] k includes at least one of the following:

[0512] The processing time of the feedback information on the first frequency;

[0513] The second processing time;

[0514] The time offset configured by RRC;

[0515] The time offset indicated by the first information;

[0516] Wherein, the second processing time is predefined by the protocol or reported by the terminal.

[0517] Optionally, the effectiveness of the information indicated by the first information satisfies at least one of the following:

[0518] It becomes effective immediately in the current cycle;

[0519] It starts to become effective after the second time unit;

[0520] It starts to become effective at the transmission moment of the first reference signal in the next cycle;

[0521] It becomes effective in the Xth cycle after the current cycle; X is an integer greater than 0.

[0522] Optionally, 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,

[0523] 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;

[0524] Wherein, the first information includes the indication information of the A-TRS;

[0525] The transmission time of the reference signal is before or after the transmission time of the A-TRS.

[0526] Optionally, the first transmission module 701 is specifically configured to:

[0527] When the second condition is satisfied, send the reference signal to the terminal on the first frequency or the second frequency according to the default reference signal layout or the conventional reference signal layout;

[0528] The second condition includes at least one of the following:

[0529] The serving cell corresponding to the second frequency completes the activation process;

[0530] After the first preset duration of activation of the serving cell corresponding to the second frequency;

[0531] After the second preset duration of the network side device sending the first information;

[0532] After the third preset duration of the network side device sending the reference signal.

[0533] 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;

[0534] Optionally, the trigger information of the terminal includes the identification information of the network side device.

[0535] Optionally, the apparatus further includes:

[0536] A third sending module, configured to indicate that the terminal can send trigger information.

[0537] The reference signal sending apparatus in the embodiments of the present application may be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a network side device or other devices other than the network side device. Exemplarily, the network side device may include, but is not limited to, the types of the network side device 12 listed above, and other devices may be a server, a Network Attached Storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0538] The reference signal sending apparatus provided in the embodiments of the present application can implement Figure 2 each process implemented by the method embodiment shown and achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0539] Figure 8 is a schematic structural diagram of the reference signal receiving apparatus provided in the embodiments of the present application. As Figure 8 shown, the reference signal receiving apparatus 800 is applied to a terminal. The reference signal receiving apparatus 800 includes:

[0540] A receiving module 801, configured to receive first information sent by a network side device; the first information is used to indicate that the network side device sends a reference signal;

[0541] A determining module 802, configured to determine whether to receive the reference signal sent by the network side device according to the first information.

[0542] Optionally, the receiving module 801 is specifically configured to:

[0543] Receive the first information sent by the network side device at a first frequency.

[0544] Optionally, the receiving module 801 is further configured to:

[0545] Receive the reference signal sent by the network side device when the terminal determines to receive the reference signal sent by the network side device.

[0546] Optionally, the receiving module 801 is specifically configured to:

[0547] Receive the reference signal sent by the network-side device on the first frequency or the second frequency.

[0548] Optionally, the device further includes:

[0549] A processing module, configured to perform a target operation based on the reference signal, where the target operation includes at least one of the following: synchronization, measurement, reporting.

[0550] Optionally, the device further includes:

[0551] A sending module, configured to send feedback information on the resource corresponding to the first frequency; the feedback information is used to indicate whether the terminal correctly receives the first information;

[0552] When the terminal correctly receives the first information on the first frequency, the feedback information is ACK;

[0553] When the terminal does not correctly receive the first information on the first frequency, the feedback information is NACK.

[0554] Optionally, the receiving module 801 is specifically configured to perform at least one of the following:

[0555] Detect the reference signal starting from the start boundary or the end boundary corresponding to the first moment;

[0556] Detect the reference signal starting from the second moment;

[0557] Detect the reference signal starting from a position 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;

[0558] Receive the reference signal on the second frequency within the first time window.

[0559] Optionally, the receiving module 801 is specifically configured to:

[0560] 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, detect the reference signal starting from the start boundary or the end boundary corresponding to the first moment;

[0561] 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, detect the reference signal starting from the second moment.

[0562] Optionally, the fourth moment is time slot n1;

[0563] The second moment is time slot n1 + k1;

[0564] Wherein, the time slot n1 is the moment of the cell corresponding to the second frequency when the terminal receives the first information or sends feedback information;

[0565] The time slot n1 + k1 is the moment of the cell corresponding to the second frequency;

[0566] The k1 includes at least one of the following:

[0567] The processing time of the feedback information;

[0568] The third processing time;

[0569] Wherein, the third processing time is predefined by the protocol.

[0570] Optionally, the starting position of the first time window is determined based on at least one of the following:

[0571] The first moment;

[0572] The second moment;

[0573] The position obtained by offsetting the third moment or the fourth moment by T time units;

[0574] The length of the first time window satisfies at least one of the following:

[0575] 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;

[0576] The length of the first time window is related to the time domain pattern of the reference signal;

[0577] The length of the first time window is related to the time domain indication information of the reference signal.

[0578] Optionally, the processing module is further configured to perform at least one of the following:

[0579] Until receiving the next first information, no longer receive the reference signal, or no longer measure the reference signal, or no longer perform synchronization based on the reference signal;

[0580] Until receiving the next first information, receive the reference signal, measure the reference signal, or perform synchronization based on the reference signal according to the period or position preconfigured or configured by the network side device or indicated by the first information;

[0581] 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, receive the reference signal, measure the reference signal, or perform synchronization based on the reference signal according to a period or location pre-configured or configured by the network-side device;

[0582] When the reference signal or the first information is related to cell deactivation, after cell deactivation or after a fourth time interval of cell deactivation, receive the reference signal, measure the reference signal, or perform synchronization based on the reference signal according to a period or location pre-configured or configured by the network-side device.

[0583] Optionally, the first information is indicated according to at least one of the following granularities:

[0584] 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.

[0585] Optionally, the first information is carried by at least one of the following:

[0586] Downlink control information DCI;

[0587] Medium access control unit MAC CE;

[0588] Radio resource control RRC message.

[0589] Optionally, the DCI is at least one of the following: terminal-specific DCI, group-common DCI;

[0590] Wherein, the terminal-specific DCI satisfies at least one of the following:

[0591] The relevant information of the first information in the terminal-specific DCI is configured by the network-side device;

[0592] The terminal-specific DCI includes the relevant information of the first information;

[0593] The terminal-specific DCI includes a first indication field for indicating the first information;

[0594] 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 on cells or cell groups that support on-demand reference signals; transmission configuration information of on-demand reference signals;

[0595] The group-common DCI satisfies at least one of the following:

[0596] The cyclic redundancy check (CRC) of the group common DCI is scrambled by a radio network temporary identity (RNTI) that identifies the reference signal;

[0597] One block in the group common DCI corresponds to a specific terminal;

[0598] One block in the group common DCI corresponds to a granularity;

[0599] The group common DCI is used to indicate at least one of the following: transmission of the reference signal; triggering the transmission of the reference signal; cell activation; cell deactivation; synchronization; measurement;

[0600] The group common DCI includes: a second indication field for indicating that the group common DCI includes the first information;

[0601] The reference signal of the serving cell corresponding to the group common DCI is transmitted on demand.

[0602] Optionally, when one block in the group common DCI corresponds to one granularity, the block includes at least one of the following:

[0603] A third indication field for indicating whether to transmit the reference signal;

[0604] A fourth indication field for indicating the type of the reference signal.

[0605] Optionally, the MAC CE is used for at least one of the following:

[0606] Activating the transmission of the reference signal;

[0607] Deactivating the transmission of the reference signal;

[0608] Activating the serving cell;

[0609] Deactivating the serving cell;

[0610] Activating the transmission of the reference signal corresponding to the serving cell;

[0611] Deactivating the transmission of the reference signal corresponding to the serving cell;

[0612] Activating the transmission of the aperiodic tracking reference signal (A-TRS);

[0613] Deactivating the transmission of the A-TRS.

[0614] Optionally, the secondary cell configuration information or secondary cell addition information in the RRC message is used as the first information; or,

[0615] The secondary cell configuration information or secondary cell addition information in the RRC message includes the first information.

[0616] Optionally, the first information includes at least one of the following:

[0617] First indication information for indicating the transmission or cancellation of the reference signal;

[0618] 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;

[0619] Third indication information for indicating whether the reference signal is a cell-defined reference signal or a non-cell-defined reference signal;

[0620] Cell or cell group information associated with the reference signal;

[0621] Measurement object MO, measurement ID, or MO group information associated with the reference signal;

[0622] Frequency point or frequency point group information of the reference signal;

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

[0624] Quasi-co-location QCL information;

[0625] Transmission configuration indication TCI information;

[0626] Time domain pattern;

[0627] Fourth indication information for indicating whether the reference signal is repetitively transmitted or beam scanned;

[0628] Frequency domain information of the reference signal;

[0629] Time offset for transmitting or receiving the reference signal;

[0630] Parameter set of the reference signal;

[0631] Wherein, the QCL information or TCI information includes at least one of the following:

[0632] QCL source;

[0633] QCL type;

[0634] The time domain pattern includes at least one of the following:

[0635] Index of the reference signal;

[0636] Starting position of the reference signal;

[0637] Receiving time window length of the reference signal.

[0638] Optionally, the device further includes:

[0639] A sending module, configured to send a trigger message when receiving an indication from a network-side device that the terminal is allowed to send the trigger message.

[0640] Optionally, the trigger message includes identification information of the network-side device.

[0641] In an embodiment of the present application, a terminal receives a first message sent by a network-side device; the first message 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 achieving on-demand transmission of the reference signal, reducing the power consumption of the network-side device, and thus achieving network energy saving.

[0642] The reference signal receiving device in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal or other devices other than the terminal. Exemplarily, the terminal may include, but is not limited to, the types of terminal 11 listed above, and other devices may be a server, a Network Attached Storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

[0643] The reference signal receiving device provided in the embodiment of the present application can implement Figure 3 each process implemented by the method embodiment shown, and achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0644] The embodiment of the present application further provides a communication device, Figure 9 which is a schematic structural diagram of the communication device provided in the embodiment of the present application. As Figure 9 shown, the communication device 900 includes a processor 901 and a memory 902. A program or instruction that can run on the processor 901 is stored on the memory 902. For example, when the communication device 900 is a terminal, when the program or instruction is executed by the processor 901, it implements each step of the method embodiment shown above Figure 3 and can achieve the same technical effect. When the communication device 900 is a network-side device, when the program or instruction is executed by the processor 901, it implements each step of the method embodiment shown above Figure 2 and can achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0645] The embodiment of the present application further provides a terminal, including a processor and a communication interface. The communication interface is coupled to the processor. The processor is configured to run a program or instruction to implement as Figure 3Steps in the method embodiments shown. This terminal embodiment corresponds to the above-mentioned terminal-side method embodiments. Each implementation process and realization manner of the above method embodiments can be applied to this terminal embodiment, and the same technical effects can be achieved.

[0646] An embodiment of the present application also provides a terminal. Figure 10 It is a schematic diagram of the hardware structure of the terminal provided by the embodiment of the present application. As Figure 10 shown, the terminal 1000 includes but is not limited to at least some components such as a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, a user input unit 1007, an interface unit 1008, a memory 1009, and a processor 1010.

[0647] Those skilled in the art can understand that the terminal 1000 may further include a power source (such as a battery) for supplying power to each component. The power source can be logically connected to the processor 1010 through a power management system, so as to implement functions such as management of charging, discharging, and power consumption management through the power management system. Figure 10 The terminal structure shown in does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine some components, or have different component arrangements, which will not be elaborated here.

[0648] It should be understood that in the embodiment of the present application, the input unit 1004 may include a graphics processing unit (GPU) 10041 and a microphone 10042. The graphics processing unit 10041 processes the image data of static pictures or videos obtained by an image 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 at least one of a touch panel 10071 and 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. The other input devices 10072 may include but are not limited to a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be elaborated here.

[0649] In the embodiment of the present application, after the radio frequency unit 1001 receives downlink data from a network-side device, it can be transmitted to the processor 1010 for processing; in addition, the radio frequency unit 1001 can send uplink data to the network-side device. Generally, the radio frequency unit 1001 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0650] 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. Among them, the first storage area may store an operating system, application programs or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 1009 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDR SDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM), and a direct rambus random access memory (DRRAM). The memory 1009 in the embodiments of the present application includes, but is not limited to, these and any other suitable types of memories.

[0651] The processor 1010 may include one or more processing units; optionally, the processor 1010 integrates an application processor and a modem processor. Among them, the application processor mainly processes operations related to the operating system, user interface, and application programs, etc., and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above-mentioned modem processor may not be integrated into the processor 1010 either.

[0652] Among them, the radio frequency unit 1001 is used to receive 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;

[0653] The processor 1010 is used to determine whether to receive the reference signal sent by the network-side device according to the first information.

[0654] Optionally, the radio frequency unit 1001 is specifically configured to receive the first information sent by the network side device at the first frequency.

[0655] Optionally, the radio frequency unit 1001 is further configured to:

[0656] When the terminal determines to receive the reference signal sent by the network side device, receive the reference signal sent by the network side device.

[0657] Optionally, the radio frequency unit 1001 is specifically configured to:

[0658] Receive the reference signal sent by the network side device at the first frequency or the second frequency.

[0659] Optionally, the processor 1010 is further configured to perform a target operation based on the reference signal, and the target operation includes at least one of the following: synchronization, measurement, and reporting.

[0660] Optionally, the radio frequency unit 1001 is further configured to send 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;

[0661] When the terminal correctly receives the first information at the first frequency, the feedback information is ACK;

[0662] When the terminal does not correctly receive the first information at the first frequency, the feedback information is NACK.

[0663] Optionally, the radio frequency unit 1001 is specifically configured to perform at least one of the following:

[0664] Detect the reference signal starting from the start boundary or the end boundary corresponding to the first moment;

[0665] Detect the reference signal starting from the second moment;

[0666] Detect the reference signal starting 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;

[0667] Receive the reference signal at the second frequency within the first time window.

[0668] Optionally, the radio frequency unit 1001 is specifically configured to:

[0669] 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 detects the reference signal starting from the start boundary or the end boundary corresponding to the first moment;

[0670] 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 detects the reference signal starting from the second moment.

[0671] Optionally, the fourth moment is time slot n1;

[0672] The second moment is time slot n1 + k1;

[0673] Wherein, the time slot n1 is the moment of the cell corresponding to the second frequency when the terminal receives the first information or sends feedback information;

[0674] The time slot n1 + k1 is the moment of the cell corresponding to the second frequency;

[0675] The k1 includes at least one of the following:

[0676] The processing time of the feedback information;

[0677] The third processing time;

[0678] Wherein, the third processing time is predefined by the protocol.

[0679] Optionally, the starting position of the first time window is determined based on at least one of the following:

[0680] The first moment;

[0681] The second moment;

[0682] The position offset by T time units from the third moment or the fourth moment;

[0683] The length of the first time window satisfies at least one of the following:

[0684] 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;

[0685] The length of the first time window is related to the time domain pattern of the reference signal;

[0686] The length of the first time window is related to the time domain indication information of the reference signal.

[0687] Optionally, the processor 1010 is further configured to perform at least one of the following:

[0688] Before receiving the next piece of the first information, no longer receive the reference signal, or no longer measure the reference signal, or no longer perform synchronization based on the reference signal;

[0689] Before receiving the next piece of the first information, receive the reference signal, measure the reference signal, or perform synchronization based on the reference signal according to the period or position preconfigured or configured by the network side device or indicated by the first information;

[0690] In the case where the reference signal or the first information is related to cell activation, after cell activation or after a third time interval of cell activation, receive the reference signal, measure the reference signal, or perform synchronization based on the reference signal according to the period or position preconfigured or configured by the network side device;

[0691] In the case where the reference signal or the first information is related to cell deactivation, after cell deactivation or after a fourth time interval of cell deactivation, receive the reference signal, measure the reference signal, or perform synchronization based on the reference signal according to the period or position preconfigured or configured by the network side device.

[0692] Optionally, the first information is indicated according to at least one of the following granularities:

[0693] 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.

[0694] Optionally, the first information is carried by at least one of the following:

[0695] Downlink control information DCI;

[0696] Medium access control unit MAC CE;

[0697] Radio resource control RRC message.

[0698] Optionally, the DCI is at least one of the following: terminal-specific DCI, group common DCI;

[0699] Wherein, the terminal-specific DCI satisfies at least one of the following:

[0700] The relevant information of the first information in the terminal-specific DCI is configured by the network side device;

[0701] The terminal-specific DCI includes the relevant information of the first information;

[0702] The terminal-specific DCI includes a first indication field for indicating the first information;

[0703] Among them, the related 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; the cell or cell group information that supports on-demand reference signals; the transmission configuration information of on-demand reference signals;

[0704] The group common DCI satisfies at least one of the following:

[0705] The cyclic redundancy check CRC of the group common DCI is scrambled by the radio network temporary identity that identifies the reference signal;

[0706] One block in the group common DCI corresponds to a specific terminal;

[0707] One block in the group common DCI corresponds to a granularity;

[0708] 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;

[0709] The group common DCI includes: a second indication field for indicating that the group common DCI includes the first information;

[0710] The reference signal of the serving cell corresponding to the group common DCI is transmitted in an on-demand manner.

[0711] Optionally, when one block in the group common DCI corresponds to one granularity, the block includes at least one of the following:

[0712] A third indication field for indicating whether to transmit the reference signal;

[0713] A fourth indication field for indicating the type of the reference signal.

[0714] Optionally, the MAC CE is used for at least one of the following:

[0715] Activating the transmission of the reference signal;

[0716] Deactivating the transmission of the reference signal;

[0717] Activating the serving cell;

[0718] Deactivating the serving cell;

[0719] Activating the transmission of the reference signal corresponding to the serving cell;

[0720] Deactivating the transmission of the reference signal corresponding to the serving cell;

[0721] Activating the transmission of the aperiodic tracking reference signal A-TRS;

[0722] Deactivate the transmission of the A-TRS.

[0723] Optionally, the secondary cell configuration information or secondary cell addition information in the RRC message is used as the first information; or,

[0724] The secondary cell configuration information or secondary cell addition information in the RRC message includes the first information.

[0725] Optionally, the first information includes at least one of the following:

[0726] First indication information for indicating the transmission or cancellation of the reference signal;

[0727] 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;

[0728] Third indication information for indicating whether the reference signal is a cell-defined reference signal or a non-cell-defined reference signal;

[0729] The cell or cell group information associated with the reference signal;

[0730] The measurement object MO, measurement ID, or MO group information associated with the reference signal;

[0731] The frequency point or frequency point group information of the reference signal;

[0732] The PCI or PCI group information associated with the reference signal;

[0733] Quasi-co-location (QCL) information;

[0734] Transmission Configuration Indicator (TCI) information;

[0735] Time domain pattern;

[0736] Fourth indication information for indicating whether the reference signal is transmitted repeatedly or by beam scanning;

[0737] The frequency domain information of the reference signal;

[0738] The time offset for transmitting or receiving the reference signal;

[0739] The parameter set of the reference signal;

[0740] Wherein, the QCL information or TCI information includes at least one of the following:

[0741] QCL source;

[0742] QCL type;

[0743] The time-domain pattern includes at least one of the following:

[0744] The index of the reference signal;

[0745] The starting position of the reference signal;

[0746] The reception time window length of the reference signal.

[0747] It can be understood that the implementation processes of the various implementation manners mentioned in this embodiment may refer to Figure 3 the relevant descriptions of the method embodiments shown, and achieve the same or corresponding technical effects. To avoid repetition, they will not be elaborated here.

[0748] This embodiment of the present application further provides a network-side device, including a processor and a communication interface. The communication interface is coupled to the processor. The processor is configured to run programs or instructions to implement the steps of the method embodiment as Figure 2 shown. This embodiment of the network-side device corresponds to the above-mentioned method embodiment of the network-side device. The various implementation processes and implementation manners of the above method embodiment can all be applied to this embodiment of the network-side device, and the same technical effects can be achieved.

[0749] This embodiment of the present application further provides a network-side device, Figure 11 which is a schematic diagram of the hardware structure of the network-side device provided in this embodiment of the present application. As Figure 11 shown, the network-side device 1100 includes: an antenna 111, a radio frequency device 112, a baseband device 113, a processor 114, and a memory 115. The antenna 111 is connected to the radio frequency device 112. In the uplink direction, the radio frequency device 112 receives information through the antenna 111 and sends the received information to the baseband device 113 for processing. In the downlink direction, the baseband device 113 processes the information to be sent and sends it to the radio frequency device 112. The radio frequency device 112 processes the received information and then sends it out through the antenna 111.

[0750] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 113. The baseband device 113 includes a baseband processor.

[0751] The baseband device 113 may include, for example, at least one baseband board. A plurality of chips are provided on the baseband board. As Figure 11 shown, one of the chips is, for example, a baseband processor, which is connected to the memory 115 through a bus interface to call the programs in the memory 115 and execute the operations of the network device shown in the above method embodiment.

[0752] The network-side device may further include a network interface 116, which is, for example, a Common Public Radio Interface (CPRI).

[0753] Specifically, the network-side device 1100 in the embodiments of the present application further includes: instructions or programs stored in the memory 115 and executable on the processor 114. The processor 114 calls the instructions or programs in the memory 115 to execute Figure 2 the steps of the method embodiments shown, and achieves the same technical effects. To avoid repetition, they will not be elaborated here.

[0754] The embodiments of the present application further provide a readable storage medium, on which programs or instructions are stored. When the programs or instructions are executed by a processor, they implement the various processes of the above method embodiments and can achieve the same technical effects. To avoid repetition, they will not be elaborated here.

[0755] Wherein, the processor is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disks, or optical discs, etc. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0756] The embodiments of the present application further provide a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above method embodiments and can achieve the same technical effects. To avoid repetition, they will not be elaborated here.

[0757] It should be understood that the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, system chip, chip system, or system-on-chip.

[0758] The embodiments of the present application further provide a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the various processes of the above method embodiments and can achieve the same technical effects. To avoid repetition, they will not be elaborated here.

[0759] The embodiments of the present application further provide a wireless communication system, including: a terminal and a network-side device. The terminal can be used to execute the steps of the method embodiments as shown in Figure 2 The network-side device can be used to execute the steps of the method embodiments as shown in Figure 3 the method embodiments shown.

[0760] It should be noted that in this text, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0761] Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of computer software products plus the necessary general hardware platforms, and of course, can also be implemented by hardware. The computer software products are stored in storage media (such as ROM, RAM, magnetic disks, optical disks, etc.) and include several instructions for causing a terminal or a network-side device to execute the methods described in various embodiments of the present application.

[0762] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms of embodiments without departing from the purpose of the present application and the scope protected by the claims. These embodiments are all within the protection scope of the present application.

Claims

1. A method for transmitting a reference signal, characterized in that, Including: 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; The network-side device sends the reference signal to the terminal.

2. The method according to claim 1, wherein The network-side device sending 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 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 to 3, characterized in that 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, characterized in that 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, characterized in that 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 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 one 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 sent in an on-demand manner.

7. The method according to claim 6, characterized in that 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, characterized in that 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. The method according to any one of claims 1 to 10, characterized in that, 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, characterized in that, 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 side device determines that the terminal does not correctly receive the first information; When no ACK feedback information is received, the network side device determines that the terminal does not correctly receive the first information; When no NACK feedback information is received, the network side 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 side 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 side device, or predefined by the protocol.

15. The method according to any one of claims 1-14, characterized in that, The network side device sending the reference signal to the terminal includes: The network side 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 side 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 transmission moment of the first information, or the transmission moment or reception 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, characterized in that, The network side 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 to 19, characterized in that, 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, characterized in that, 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, characterized in that, 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, characterized in that, 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, characterized in that, The method further includes: The terminal performs a target operation based on the reference signal, and the target operation includes 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, characterized in that, 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 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 cell corresponding to the second frequency when the terminal receives the first information or sends 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 offset by T time units from the third moment or the fourth moment; 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, characterized in that, 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 the 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 the 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, characterized in that 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, characterized in that 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 supporting 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 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, characterized in that 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, characterized in that 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, characterized in that 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, characterized in that 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 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 start 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, characterized in that, When receiving an indication from the network device that the terminal can send trigger information, the terminal sends the trigger information.

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

44. A transmitting device for reference signals, characterized in that, 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 transmits 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, characterized in that, 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 transmits 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, characterized in that, Comprising a processor and a memory, where the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, the steps of the method for receiving a reference signal according to any one of claims 1 to 23 are implemented.

47. A terminal, characterized in that, Comprising a processor and a memory, where the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, the steps of the method for transmitting a reference signal according to any one of claims 24 to 43 are implemented.

48. A readable storage medium, characterized in that, The program or instruction is stored on the readable storage medium, and when the program or instruction is executed by the processor, the steps of the method for transmitting a reference signal according to any one of claims 1 to 23 are implemented, or the steps of the method for receiving a reference signal according to any one of claims 24 to 43 are implemented.

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