Communication method, apparatus and system, and storage medium, program product and chip

Abstract

A communication method, apparatus and system, and a storage medium, a program product and a chip. The method comprises: a network device sending first information to a terminal, wherein the first information comprises configuration information of a first reference signal, the first reference signal and a second reference signal correspond to different frequency-domain resources, within a first time period, the first reference signal is used for mobility management measurement of at least one first region and the second reference signal is used for mobility management measurement of at least one second region, and the terminal is located in one of the at least one first region within the first time period; on the basis of the configuration information, the network device sending the first reference signal to the terminal; and the terminal sending a measurement result of the first reference signal to the network device. A first reference signal is configured to be used for mobility management measurement of a first region, such that when a terminal is located in the first region, mobility management measurement can be performed on the basis of the first reference signal, thereby reducing the mobility interruption delay and improving the handover success rate.

Description

Communication method, device, system, storage medium, program product and chip

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on March 18, 2024, with application number 202410309370.7 and invention name “Communication method, device, system, storage medium, program product and chip”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technology, and in particular to a communication method, device, system, storage medium, program product, and chip. Background Art

[0003] In non-terrestrial networks (NTNs), satellite motion can cause group handoffs or group reselections for terminals within a given geographic area. Because satellites move at high speeds, group handoffs or group reselections triggered primarily by network mobility are common.

[0004] Taking cell handover as an example, handovers in new radio (NR) / NTN scenarios are currently typically triggered at Layer 3 (L3). Handover-related configuration information must pass through the radio resource control (RRC) layer, resulting in long mobility interruption delays. Furthermore, cell handover measurements are primarily based on the cell-defining synchronization signal (CD-SSB), which can lead to interference between synchronization signals between cells.

[0005] Therefore, the current cell switching / reselection process has a long mobile interruption delay and the effectiveness of CD-SSB-based measurements is limited, so the switching / reselection efficiency needs to be improved. Summary of the Invention

[0006] The present application provides a communication method, apparatus, system, storage medium, program product, and chip, so that during the cell switching / reselection process, mobility management can be performed based on flexible reference signals, reducing mobile interruption delay and improving switching / reselection efficiency.

[0007] In a first aspect, a communication method is provided, the method comprising: a terminal receiving first information, wherein the first information includes configuration information of a first reference signal, the first reference signal and a second reference signal correspond to different frequency domain resources, and within a first time period, the first reference signal is used for mobility management measurement of at least one first area, and the second reference signal is used for mobility management measurement of at least one second area; the terminal receiving the first reference signal based on the configuration information, wherein the terminal is located in one of the at least one first area within the first time period; and the terminal sending second information, wherein the second information is used to indicate a measurement result of the first reference signal.

[0008] In this aspect, the terminal receives a first reference signal configured by a network device for mobility management measurement of at least one first area. When the terminal is located in any one of the at least one first area, it can perform mobility management measurement based on the first reference signal, thereby reducing the mobile interruption delay and improving the switching success rate.

[0009] In combination with the first aspect, in one possible implementation, the configuration information of the first reference signal includes at least one of the following: the frequency or polarization mode of the first reference signal, the period of the first reference signal, the time domain offset between the first reference signal and the second reference signal, the pattern of the first reference signal, the access timing associated with the first reference signal, and the measurement configuration of the first reference signal.

[0010] In combination with the first aspect, in another possible implementation, within a second time period, the first reference signal is used for mobility management measurement of at least one fourth area, and the second reference signal is used for mobility management measurement of at least one fifth area. The terminal is located in one of the at least one fifth areas within the second time period. The method also includes: the terminal retuning to the frequency point or polarization domain corresponding to the second reference signal; the terminal receiving the second reference signal; the terminal sending third information, wherein the third information is used to indicate the measurement result of the second reference signal; and the terminal receiving remaining minimum system information (RMSI).

[0011] In this implementation, when the terminal is in the area corresponding to the second reference signal, the terminal needs to be retuned to the frequency point or polarization domain corresponding to the second reference signal so that the terminal can accurately receive the second reference signal and perform mobility management measurements based on the second reference signal, thereby reducing the mobile interruption delay and improving the switching success rate.

[0012] With reference to the first aspect, in another possible implementation, the configuration information of the first reference signal includes frequency and / or polarization information of the second reference signal.

[0013] In combination with the first aspect, in another possible implementation, the first reference signal includes at least one of the following: a non-cell-defining SSB (NCD-SSB), a flexible synchronization signal (on-demand SSB), and a reference signal that has a quasi-colocation (QCL) relationship with the NCD-SSB or the on-demand SSB.

[0014] Illustratively, the method described in the first aspect or any implementation of the first aspect may be implemented by a terminal, or a chip or circuit for a terminal.

[0015] According to a second aspect, a communication method is provided, the method comprising: a network device sending first information, wherein the first information includes configuration information of a first reference signal, the first reference signal and the second reference signal correspond to different frequency domain resources, and within a first time period, the first reference signal is used for mobility management measurement of at least one first area, and the second reference signal is used for mobility management measurement of at least one second area; the network device sends the first reference signal based on the configuration information; and the network device receives second information from a terminal, wherein the second information is used to indicate a measurement result of the first reference signal, and the terminal belongs to one of the at least one first area within the first time period.

[0016] In this aspect, by configuring the first reference signal for mobility management measurement of at least one first area, when the terminal is located in any one of the at least one first area, mobility management measurement can be performed based on the first reference signal, thereby reducing the mobile interruption delay and improving the switching success rate.

[0017] In combination with the second aspect, in one possible implementation, the configuration information of the first reference signal includes at least one of the following: the frequency or polarization mode of the first reference signal, the period of the first reference signal, the time domain offset between the first reference signal and the second reference signal, the pattern of the first reference signal, the access timing associated with the first reference signal, and the measurement configuration of the first reference signal.

[0018] In combination with the second aspect, in another possible implementation, the first information also includes configuration information of a third reference signal, the third reference signal is used for mobility management measurement of at least one third area, the third reference signal and the second reference signal correspond to different frequency domain resources, and the third reference signal is different from the first reference signal in at least one of the following: the starting position of the time-frequency domain, the frequency point, the polarization mode, the period, the access timing, and the preamble resource.

[0019] In combination with the second aspect, in another possible implementation, within a second time period, the first reference signal is used for mobility management measurement of at least one fourth area, and the second reference signal is used for mobility management measurement of at least one fifth area, and the first wave position belongs to the at least one fifth area within the second time period. The method also includes: the network device sends the second reference signal; the network device receives third information, wherein the third information is used to indicate the measurement result of the second reference signal; and the network device sends RMSI.

[0020] In this implementation, when the terminal is in the area corresponding to the second reference signal, the terminal needs to be retuned to the frequency point or polarization domain corresponding to the second reference signal so that the terminal can accurately receive the second reference signal and perform mobility management measurements based on the second reference signal, thereby reducing the mobile interruption delay and improving the switching success rate.

[0021] With reference to the second aspect, in another possible implementation, the configuration information of the first reference signal includes frequency and / or polarization information of the second reference signal.

[0022] In combination with the second aspect, in another possible implementation, the first reference signal includes at least one of the following: NCD-SSB, on-demand SSB, and a reference signal that has a quasi-co-location relationship with the NCD-SSB or the on-demand SSB.

[0023] Illustratively, the method described in the second aspect or any implementation of the second aspect may be implemented by a network device, or a chip or circuit used for a network device.

[0024] In a third aspect, a communication device is provided for implementing the communication method in the first aspect or any one of the implementations of the first aspect. The device may be a terminal, or a module applied to a terminal (such as a processor, a chip, or a chip system, etc.), or a logical node, a logical module, or software that can implement all or part of a terminal. In one implementation, the communication device may include a sending unit, a receiving unit, and may also include a processing unit. The sending unit and the receiving unit may be independent or combined together (which may be referred to as a "transceiver unit").

[0025] In a fourth aspect, a communication device is provided for implementing the communication method in the second aspect or any one of the implementations of the second aspect. The device may be a network device, or a module (such as a processor, a chip, or a chip system, etc.) applied to a network device, or a logical node, a logical module, or software that can implement all or part of the functions of a network device. In one implementation, the communication device may include a sending unit, a receiving unit, and may also include a processing unit. The sending unit and the receiving unit may be independent or combined together (which may be referred to as a "transceiver unit").

[0026] In a possible implementation, the communication device in the third to fourth aspects includes a module for respectively executing the method in any one of the first and second aspects or any implementation thereof.

[0027] Wherein, when the communication device is used to implement the method described in the first aspect or any one of the implementations of the first aspect, the transceiver unit is used to receive first information, wherein the first information includes configuration information of a first reference signal, the first reference signal and the second reference signal correspond to different frequency domain resources, and within a first time period, the first reference signal is used for mobility management measurement of at least one first area, and the second reference signal is used for mobility management measurement of at least one second area; the transceiver unit is also used to receive the first reference signal based on the configuration information, wherein the communication device is located in one of the at least one first areas within the first time period; and the transceiver unit is also used to send second information, wherein the second information is used to indicate the measurement result of the first reference signal.

[0028] Optionally, the configuration information of the first reference signal includes at least one of the following: the frequency or polarization mode of the first reference signal, the period of the first reference signal, the time domain offset between the first reference signal and the second reference signal, the pattern of the first reference signal, the access timing associated with the first reference signal, and the measurement configuration of the first reference signal.

[0029] Optionally, within the second time period, the first reference signal is used for mobility management measurement of at least one fourth area, and the second reference signal is used for mobility management measurement of at least one fifth area. The communication device is located in one of the at least one fifth areas within the second time period. The processing unit is used to re-tune the communication device to the frequency point or polarization domain corresponding to the second reference signal; the transceiver unit is also used to receive the second reference signal; the transceiver unit is also used to send third information, wherein the third information is used to indicate the measurement result of the second reference signal; and the transceiver unit is also used to receive RMSI.

[0030] Optionally, the configuration information of the first reference signal includes frequency and / or polarization information of the second reference signal.

[0031] Optionally, the first reference signal includes at least one of the following: NCD-SSB, on-demand SSB, and a reference signal that has a quasi-co-location relationship with the NCD-SSB or the on-demand SSB.

[0032] Wherein, when the communication device is used to implement the method described in the second aspect or any one of the implementations of the second aspect, the transceiver unit is used to send first information, wherein the first information includes configuration information of the first reference signal, the first reference signal and the second reference signal correspond to different frequency domain resources, and within a first time period, the first reference signal is used for mobility management measurement of at least one first area, and the second reference signal is used for mobility management measurement of at least one second area; the transceiver unit is also used to send the first reference signal based on the configuration information; and the transceiver unit is also used to receive second information from the terminal, wherein the second information is used to indicate the measurement result of the first reference signal, and the terminal belongs to one of the at least one first area within the first time period.

[0033] Optionally, the configuration information of the first reference signal includes at least one of the following: the frequency or polarization mode of the first reference signal, the period of the first reference signal, the time domain offset between the first reference signal and the second reference signal, the pattern of the first reference signal, the access timing associated with the first reference signal, and the measurement configuration of the first reference signal.

[0034] Optionally, the first information also includes configuration information of a third reference signal, the third reference signal is used for mobility management measurement of at least one third area, the third reference signal and the second reference signal correspond to different frequency domain resources, and the third reference signal is different from the first reference signal in at least one of the following: starting position of the time-frequency domain, frequency point, polarization mode, period, access timing, and preamble resources.

[0035] Optionally, within the second time period, the first reference signal is used for mobility management measurement of at least one fourth area, and the second reference signal is used for mobility management measurement of at least one fifth area, the first wave position belongs to the at least one fifth area within the second time period, and the transceiver unit is further used to send the second reference signal; the transceiver unit is further used to receive third information, wherein the third information is used to indicate the measurement result of the second reference signal; and the transceiver unit is also used to send RMSI.

[0036] Optionally, the configuration information of the first reference signal includes frequency and / or polarization information of the second reference signal.

[0037] Optionally, the first reference signal includes at least one of the following: NCD-SSB, on-demand SSB, and a reference signal that has a quasi-co-location relationship with the NCD-SSB or the on-demand SSB.

[0038] In another possible implementation, the communication device in the third and fourth aspects includes a processor coupled to a memory; the processor is configured to enable the device to perform the corresponding functions in the above-mentioned communication method. The memory is coupled to the processor and stores the necessary programs (instructions) and / or data for the device. Optionally, the communication device may further include a communication interface for enabling communication between the device and other network elements. Optionally, the memory may be located inside or outside the communication device.

[0039] In another possible implementation, the communication device in the third to fourth aspects includes a processor and a transceiver, the processor being coupled to the transceiver, and the processor being used to execute a computer program or instruction to control the transceiver to receive and send information; when the processor executes the computer program or instruction, the processor is also used to implement the above method through a logic circuit or executing code instructions. The transceiver may be a transceiver, a transceiver circuit, or an input / output interface, configured to receive signals from other communication devices other than the communication device and transmit them to the processor, or to send signals from the processor to other communication devices other than the communication device. When the communication device is a chip, the transceiver is a transceiver circuit or an input / output interface.

[0040] When the communication device in the third and fourth aspects above is a chip, the sending unit may be an output unit, such as an output circuit or a communication interface; the receiving unit may be an input unit, such as an input circuit or a communication interface. When the communication device is a terminal, the sending unit may be a transmitter or a transmitter; and the receiving unit may be a receiver or a receiver.

[0041] In a fifth aspect, a computer-readable storage medium is provided, in which a computer program or instruction is stored. When the computer program or instruction is executed, the methods described in the above aspects are implemented.

[0042] In a sixth aspect, a computer program product comprising instructions is provided, which, when executed on a communication device, causes the communication device to execute the methods described in the above aspects.

[0043] In a seventh aspect, a communication system is provided, which includes the communication device described in the third aspect and the communication device described in the fourth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] FIG1 is a simplified schematic diagram of a wireless communication system provided by an embodiment of the present application;

[0045] FIG2a is a schematic diagram of a non-staring satellite communication system;

[0046] FIG2 b is a schematic diagram of a staring satellite communication system;

[0047] FIG3 is a schematic diagram of satellite cluster switching;

[0048] FIG4 is a schematic diagram of the process of cell switching in NR;

[0049] Figure 5 is a schematic diagram of CD-SSB and NCD-SSB in a terrestrial network;

[0050] FIG6 is a schematic diagram of a satellite communication system provided in an embodiment of the present application;

[0051] Figures 7a-7c are schematic diagrams of application scenarios of satellite-ground fusion networks;

[0052] FIG8 a is a schematic diagram of a transparent forwarding scenario of satellite communication;

[0053] FIG8 b is a schematic diagram of a regeneration mode scenario for satellite communications;

[0054] FIG9 is a flow chart of a communication method provided in an embodiment of the present application;

[0055] FIG10 is a schematic diagram of NCD-SSB and CD-SSB according to an embodiment of the present application;

[0056] FIG11 is a schematic diagram of mobility management based on NCD-SSB according to an embodiment of the present application;

[0057] FIG12 is a schematic diagram of two NCD-SSBs and a CD-SSB according to an embodiment of the present application;

[0058] FIG13 is a schematic diagram of another example of mobility management based on NCD-SSB according to an embodiment of the present application;

[0059] FIG14 is a flow chart of another communication method provided in an embodiment of the present application;

[0060] FIG15 is a schematic diagram of a terminal resetting according to an embodiment of the present application;

[0061] FIG16 is a schematic diagram of mobility management based on a flexible synchronization signal according to an embodiment of the present application;

[0062] FIG17 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0063] FIG18 is a schematic structural diagram of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0064] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0065] The technology provided by this application can be applied to various communication systems. For example, the communication system can be a fourth generation (4 th generation, 4G) communication systems (such as long term evolution (LTE) systems), fifth generation (5 th generation (5G) communication systems, worldwide interoperability for microwave access (WiMAX), wireless local area network (WLAN) systems, satellite communication systems, integrated systems of multiple systems, or future communication systems such as the sixth generation (6 th generation, 6G) communication system, etc. Among them, the 5G communication system can also be called a new radio (NR) system.

[0066] A network element in a communication system can send signals to or receive signals from another network element. The signals may include information, signaling, or data. The network element can also be replaced by an entity, a network entity, a device, a terminal, a communication module, a node, a communication node, etc. The present application uses the network element as an example for description. For example, the communication system may include at least one terminal and at least one access network device. The access network device can send downlink signals to the terminal, and / or the terminal can send uplink signals to the access network device. In addition, it is understood that if the communication system includes multiple terminals, the multiple terminals can also send signals to each other, that is, the signal sending network element and the signal receiving network element can both be terminals.

[0067] Refer to Figure 1, which is a simplified schematic diagram of a wireless communication system provided in an embodiment of the present application. As shown in Figure 1, the wireless communication system includes a radio access network (RAN) 100. The radio access network 100 can be a next-generation (e.g., 6G or higher) radio access network, or a traditional (e.g., 5G, 4G) radio access network. One or more terminals (120a-120g, collectively referred to as 120) can be connected to each other, or connected to one or more network devices (110a~110c, collectively referred to as 110) in the radio access network 100, and the connection method can be wired or wireless. Optionally, Figure 1 is only a schematic diagram, and the wireless communication system may also include other devices, such as core network devices, wireless relay devices and / or wireless backhaul devices, etc., which are not shown in Figure 1.

[0068] Optionally, in actual applications, the wireless communication system may include multiple network devices (also called access network devices) and multiple terminals at the same time. A network device can serve one or more terminals at the same time. A terminal can also access one or more network devices at the same time. The embodiments of the present application do not limit the number of terminals and network devices included in the wireless communication system.

[0069] The network device may be an entity on the network side for transmitting or receiving signals. The network device may be an access device for a terminal to access the wireless communication system in a wireless manner, such as a base station. Base station can broadly cover various names as follows, or be replaced with the following names, such as: RAN node, NodeB, evolved NodeB (eNB), next generation NodeB (gNB), satellite base station, access network equipment in open radio access network (O-RAN), relay station, access point, transmission point (TRP), transmitting point (TP), master eNB (MeNB), secondary eNB (SeNB), multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, building baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), centralized unit (CU), distributed unit (DRU), etc. unit, DU), radio unit (radio unit, RU), centralized unit control plane (CU control plane, CU-CP) node, centralized unit user plane (CU user plane, CU-UP) node, positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. The network device can also refer to a communication module, a modem or a chip for being set in the aforementioned device or apparatus. The network device can also be a mobile switching center and a device that performs the base station function in device-to-device (D2D), vehicle-to-everything (V2X), and machine-to-machine (M2M) communications, a network side device in a 6G network, and a device that performs the base station function in a future communication system. The network device can support networks with the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.

[0070] Network devices can be fixed or mobile. For example, base stations 110b and 110c are stationary and are responsible for wireless transmission and reception in one or more cells from terminal 120. The helicopter or drone 120c shown in Figure 1 can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station 120c. In other examples, the helicopter or drone (120c) can be configured to act as a terminal communicating with satellite base station 110a.

[0071] In this application, the communication device used to implement the above-mentioned access network function can be an access network device, a network device having some of the access network functions, or a device capable of supporting the implementation of the access network function, such as a chip system, a hardware circuit, a software module, or a hardware circuit and a software module. The device can be installed in the access network device or used in combination with the access network device. In the method of this application, the communication device used to implement the access network device function is described as an access network device.

[0072] A terminal can be an entity on the user side for receiving or transmitting signals, such as a mobile phone. The terminal can be used to connect people, objects and machines. The terminal can communicate with one or more core networks through network devices. The terminal includes a handheld device with wireless connection function, other processing equipment connected to a wireless modem or a vehicle-mounted device, etc. The terminal can be a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device. The terminal 120 can be widely used in various scenarios, such as cellular communication, D2D, V2X, point-to-point (P2P), machine-to-machine (M2M), machine type communication (MTC), Internet of Things (IoT), virtual reality (VR), augmented reality (AR), industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, drone, robot, remote sensing, passive sensing, positioning, navigation and tracking, autonomous delivery and mobility, etc. Some examples of terminal 120 are: 3rd Generation Partnership Project (3GPP) rdThe 3GPP standard covers user equipment (UE), fixed devices, mobile devices, handheld devices, wearable devices, cellular phones, smart phones, session initiation protocol (SIP) phones, laptops, personal computers, smart books, vehicles, satellites, global positioning system (GPS) devices, target tracking devices, drones, helicopters, aircraft, ships, remote control devices, smart home devices, industrial devices, personal communication service (PCS) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), wireless network cameras, tablets, handheld computers, mobile internet devices (MIDs), wearable devices such as smart watches, VR devices, AR devices, wireless terminals in industrial control, terminals in vehicle networking systems, wireless terminals in self-driving cars, wireless terminals in smart grids, wireless terminals in transportation safety, and smart cities. The terminal 120 may be a wireless terminal in a smart city, such as a smart gas pump, a terminal on a high-speed rail, and a wireless terminal in a smart home, such as a smart speaker, a smart coffee machine, a smart printer, etc. The terminal 120 may be a wireless device in the above various scenarios or a device for being set in a wireless device, for example, a communication module, a modem or a chip in the above device. The terminal may also be referred to as a terminal device, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), etc. The terminal may also be a terminal in a future wireless communication system. The terminal may be used in a dedicated network device or a general-purpose device. The embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal.

[0073] Alternatively, a terminal can function as a base station. For example, a UE can act as a dispatching entity, providing sidelink signals between UEs in V2X, D2D, or P2P scenarios. As shown in Figure 1, a cell phone 120a and a car 120b communicate with each other using sidelink signals. Cell phone 120a and smart home device 120e communicate without relaying the communication signals through base station 110b.

[0074] In this application, the communication device used to implement the terminal function can be a terminal, or a terminal with some of the functions of the above terminal, or a device that can support the implementation of the functions of the above terminal, such as a chip system, which can be installed in the terminal or used in conjunction with the terminal. In this application, the chip system can be composed of a chip, or it can include a chip and other discrete devices. In the technical solution provided in this application, the communication device is described as a terminal or UE as an example.

[0075] Optionally, a wireless communication system is typically composed of cells, with base stations providing cell management and communication services to multiple mobile stations (MS) in the cell. The base station includes a baseband unit (BBU) and a remote radio unit (RRU). The BBU and RRU can be placed in different locations, for example: the RRU is remote and placed in an area with high traffic volume, while the BBU is placed in a central computer room. The BBU and RRU can also be placed in the same computer room. The BBU and RRU can also be different components under the same rack. Optionally, a cell can correspond to a carrier or component carrier.

[0076] In some deployments, the network devices mentioned in the embodiments of this application may include a CU, a DU, a CU and a DU, or a CU-CP, a CU-UP, or a DU node. For example, the network devices may include a gNB-CU-CP, a gNB-CU-UP, and a gNB-DU.

[0077] In some deployments, multiple RAN nodes collaborate to assist terminals in achieving wireless access, with different RAN nodes implementing portions of the base station's functionality. For example, a RAN node can be a CU, DU, CU-CP, CU-UP, or RU. The CU and DU can be separate or included in the same network element, such as the BBU. The RU can be included in a radio frequency device or radio unit, such as an RRU, AAU, or RRH.

[0078] The RAN node may support one or more types of fronthaul interfaces, and different fronthaul interfaces correspond to DUs and RUs with different functions. If the fronthaul interface between the DU and the RU is a common public radio interface (CPRI), the DU is configured to implement one or more baseband functions, and the RU is configured to implement one or more radio frequency functions. If the fronthaul interface between the DU and the RU is another type of interface, relative to the CPRI, some of the downlink and / or uplink baseband functions, such as precoding, digital beamforming (BF), or one or more of inverse fast Fourier transform (IFFT) / cyclic prefix (CP) for downlink, are moved from the DU to the RU for implementation; and for uplink, one or more of digital beamforming (BF), or fast Fourier transform (FFT) / CP removal are moved from the DU to the RU for implementation. In one possible implementation, the interface may be an enhanced common public radio interface (eCPRI). In the eCPRI architecture, the division between the DU and RU is different, corresponding to different types (category, Cat) of eCPRI, such as eCPRI Cat A, B, C, D, E, and F.

[0079] Taking eCPRI Cat A as an example, for downlink transmission, based on layer mapping, the DU is configured to implement layer mapping and one or more functions preceding it (i.e., one or more of coding, rate matching, scrambling, modulation, and layer mapping). Other functions after layer mapping (e.g., RE mapping, digital beamforming (BF), or one or more of inverse fast Fourier transform (IFFT) / cyclic prefix (CP) addition) are moved to the RU for implementation. For uplink transmission, based on RE demapping, the DU is configured to implement demapping and one or more functions preceding it (i.e., one or more of decoding, rate matching, descrambling, demodulation, inverse discrete Fourier transform (IDFT), channel equalization, and RE demapping). Other functions after demapping (e.g., one or more of digital BF or FFT / CP removal) are moved to the RU for implementation. It is understandable that for the functional description of DU and RU corresponding to various types of eCPRI, reference can be made to the eCPRI protocol, which will not be described in detail here.

[0080] In one possible design, the processing unit for implementing baseband functions in the BBU is called a baseband high layer (BBH) unit, and the processing unit for implementing baseband functions in the RRU / AAU / RRH is called a baseband low layer (BBL) unit.

[0081] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be called O-CU (Open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0082] In the embodiments of the present application, the device for implementing the functions of the network device can be a network device; it can also be a device that can support the network device to implement the functions, such as a chip system, a hardware circuit, a software module, or a hardware circuit and a software module. The device can be installed in the network device or used in conjunction with the network device. In the embodiments of the present application, only the device for implementing the functions of the network device is used as an example to illustrate, and does not constitute a limitation on the solutions of the embodiments of the present application.

[0083] It is understandable that the present application can be applied between network devices and terminals.

[0084] The communication between the network device and the terminal follows a certain protocol layer structure. The protocol layer structure may include a control plane protocol layer structure and a user plane protocol layer structure. For example, the control plane protocol layer structure may include the functions of the radio resource control (RRC) layer, the packet data convergence protocol (PDCP) layer, the radio link control (RLC) layer, the medium access control (MAC) layer, and the physical layer. For example, the user plane protocol layer structure may include the functions of the PDCP layer, the RLC layer, the MAC layer, and the physical layer. In one possible implementation, a service data adaptation protocol (SDAP) layer may also be included above the PDCP layer.

[0085] Optionally, the protocol layer structure between the network device and the terminal may also include an artificial intelligence (AI) layer for transmitting data related to AI functions.

[0086] Taking data transmission between network devices and terminals as an example, data transmission needs to pass through the user plane protocol layers, such as the SDAP layer, PDCP layer, RLC layer, MAC layer, and physical layer. The SDAP layer, PDCP layer, RLC layer, MAC layer, and physical layer can also be collectively referred to as the access layer. Data transmission is divided into sending or receiving based on the direction of transmission, and each of these layers is further divided into a sending part and a receiving part. Taking downlink data transmission as an example, after the PDCP layer obtains data from the upper layer, it transmits the data to the RLC layer and MAC layer. The MAC layer then generates a transport block, which is then wirelessly transmitted through the physical layer. Data is encapsulated accordingly in each layer. For example, data received by a layer from the layer above it is considered a service data unit (SDU) of that layer. After encapsulation by that layer, it becomes a protocol data unit (PDU) and is then passed to the next layer.

[0087] For example, a terminal may also have an application layer and a non-access layer. The application layer can be used to provide services to applications installed in the terminal. For example, downlink data received by the terminal can be sequentially transmitted from the physical layer to the application layer, and then provided to the application by the application layer. For another example, the application layer can obtain data generated by the application and sequentially transmit the data to the physical layer for transmission to other communication devices. The non-access layer can be used to forward user data, such as forwarding uplink data received from the application layer to the SDAP layer, or forwarding downlink data received from the SDAP layer to the application layer.

[0088] It should be understood that the number and type of each device in the communication system shown in Figure 1 are for illustration only, and the present application is not limited to this. In actual applications, the communication system may also include more terminals, more access network devices, and other network elements, such as core network devices, and / or network elements for implementing artificial intelligence functions.

[0089] It is understandable that all or part of the functions implemented by one or more of the terminals, access network devices, core network devices, or network elements for implementing artificial intelligence functions can be virtualized, that is, implemented by one or more of the proprietary processors or general-purpose processors and the corresponding software modules. Among them, since the terminal and the access network device involve an interface for air interface transmission, the transceiver function of the interface can be implemented by hardware. Core network equipment, such as operation administration and maintenance (OAM) network elements, can be virtualized. Optionally, one or more functions of the virtualized terminal, access network device, core network device, or network elements for implementing artificial intelligence functions can be implemented by cloud devices, such as cloud devices in an over the top (OTT) system.

[0090] Non-terrestrial communication networks:

[0091] Satellite communications have been introduced as a 5G communication scenario, known as non-terrestrial communication networks (NTNs). These networks utilize radio frequency resources from satellite platforms (including low Earth orbit (LEO), medium Earth orbit (MEO), and geostationary Earth orbit (GEO)), unmanned aerial vehicles (UAVs), or high altitude platform stations (HAPS) to provide communication services. Compared to terrestrial cellular networks (such as 5G NR), NTNs offer wider coverage, lower path loss, greater latency, faster speeds, and lower costs. As a supplement and extension of terrestrial networks, NTNs can achieve wide-area seamless coverage, a goal unattainable by wired telephone networks and terrestrial mobile communication networks, effectively addressing internet access challenges in areas lacking communication infrastructure. For example, by deploying a large number of satellites in low Earth orbit, through appropriate constellation construction, seamless coverage can be achieved across the ground. Furthermore, the round-trip data transmission delay between satellites and ground terminals can be significantly reduced to tens of milliseconds compared to satellites in geostationary orbit. With the use of technologies such as high-frequency bands, multi-spot beams, and frequency reuse, satellite communication capabilities have been significantly enhanced, while reducing unit bandwidth costs, thus meeting the needs of high-information-rate services. NTN also offers significant cost advantages compared to communications infrastructure such as terrestrial 5G networks and submarine fiber optic cables. Modern small satellites are inexpensive to develop and manufacture, and software-defined technologies can further extend the service life of in-orbit satellites. In addition to global coverage (e.g., in remote areas and on ocean-going vessels), NTN can also be used for emergency relief (e.g., disaster monitoring and emergency communications), the Internet of Things, and high-speed mobility (e.g., high-speed rail and aircraft).

[0092] Because satellites are less susceptible to natural disasters and external damage, research is underway to use them as access network equipment (e.g., base stations) in mobile communication systems, potentially enabling communication services in areas such as oceans and forests. Unlike terrestrial base stations, satellites move faster relative to the ground and their signals travel farther, resulting in greater signal path loss when used as base stations. Current communication mechanisms designed for terminals and terrestrial base stations in mobile communication systems cannot be directly applied to terminals and satellite base stations.

[0093] As an important component of the NTN, the next-generation satellite network generally shows a trend of ultra-dense and heterogeneous. First, the scale of the satellite network has grown from 66 satellites in the Iridium constellation to 720 satellites in the OneWeb constellation, and will eventually extend to the Starlink ultra-dense LEO satellite constellation of more than 12,000. Second, the satellite network presents heterogeneous characteristics, developing from traditional single-layer communication networks to multi-layer communication networks. The functions of communication satellite networks are also becoming more complex and diversified, gradually becoming compatible with and supporting functions such as navigation enhancement, earth observation, and multi-dimensional information on-orbit processing.

[0094] Beam working mode of satellite communication system:

[0095] Taking satellite communications as an example, based on the working mode of the payload (such as beam), it can usually be divided into staring (earth-fixed or quasi-earth fixed) and non-staring (earth-moving) satellite communication systems.

[0096] As shown in FIG2a, it is a schematic diagram of a non-staring satellite communication system. During a period of time (such as time T1, T2 and T3), the satellite beam coverage moves along with the satellite.

[0097] As shown in FIG2b, it is a schematic diagram of a staring satellite communication system. During a period of time (such as time T1, T2 and T3), the satellite dynamically adjusts the beam pointing so that the beam approximately covers the same area on the ground.

[0098] NTN mobility management issues:

[0099] In LEO satellite communication systems, the movement of satellite nodes can cause group handover (for connected UEs) or group reselection (for idle UEs) for terminals within a certain area (i.e., beam). For example, Figure 3 illustrates a group handover scenario. This diagram shows a UE cluster, UE-G1 (containing multiple UEs), within a single beam within Zone 2 (Zone-2). At time T1, UE-G1 is served by one or more beams of satellite SAT-2. At time T2, the movement of satellite SAT-2 renders this beam unserviceable, and one or more beams of satellite SAT-1 take over service for UE-G1. Consequently, a group handover occurs for UE cluster UE-G1. Furthermore, due to the high satellite speed of approximately 7.5 km / s, group handovers occur only every few to tens of seconds. In other words, in beam-hopping LEO satellite networks, group handovers triggered primarily by network mobility are the norm.

[0100] Existing NR / NTN mobility management methods:

[0101] Mobility management mainly includes cell handover, cell reselection, registration update, and tracking area update. Taking cell handover as an example, Figure 4 shows the process flow of cell handover in NR. The handover process of the terrestrial network mainly includes the following steps:

[0102] 1) Cell handover measurement: Usually, the network side sends the measurement configuration corresponding to multiple cells (including serving cells and neighboring cells) to the UE (see step S401: the source base station sends radio resource control reconfiguration (RRCReconfiguration) to the UE; and step S402: the UE sends radio resource control reconfiguration completion (RRCReconfigurationComplete) to the source base station). The UE measures the cell signal quality (such as reference signal receiving power (RSRP) and / or reference signal receiving quality (RSRQ)) according to the measurement configuration. The measurement signal is usually a synchronization signal (specifically, a cell-defined synchronization signal (CD-SSB)). The typical period of SSB is 5ms, 10ms, 20ms, 40ms, 80ms, and 160ms.

[0103] 2) Measurement Result Reporting: The UE reports the measurement results to the network (see step S403: UE sends a measurement report to the source base station). Reporting can be periodic or event-triggered. In event-triggered reporting, the reporting conditions are typically configured as serving cell signal quality less than threshold 1 and / or neighbor cell signal quality greater than threshold 2.

[0104] 3) Handover decision: The network side selects a suitable neighboring cell based on the reporting result (see step S404), and exchanges UE handover-related context information, admission control, reserved resources and other information (see steps S405 to S409).

[0105] 4) Handover execution: The UE receives handover-related control information from the serving cell and completes the access process in the new cell (see steps S410 to S417).

[0106] During handover, the UE requires a dedicated random access preamble, which is different from the contention-based random access preamble used during initial access. Furthermore, the random access channel (RACH) periodicity during handover supports configurations of 10 / 20 / 40 / 80 / 160ms, the same as the RACH periodicity used during initial access.

[0107] It is worth noting that due to the lack of significant near-far effect in NTN, that is, the difference in signal quality between the cell center and the edge is not obvious, the efficiency of handover / reselection triggered solely by signal quality is low. Therefore, NR / NTN considers location (satellite location and UE location)-assisted handover / reselection enhancement technologies, such as those based on time / timer, UE location information (such as the distance between the UE and the reference location of the source cell is greater than threshold 1, and the distance between the UE and the reference location of the target cell is less than threshold 2), and the combination of timer / location and signal quality to achieve mobility management in NTN networks.

[0108] However, the above-mentioned NR / NTN switching is usually triggered based on layer 3 (layer 3, L3). Since the switching-related configuration information needs to go through the RRC layer, the mobility interruption time is relatively long.

[0109] Communication mechanism based on non-cell-defining SSB (NCD-SSB) and flexible SSB (on-demand SSB):

[0110] Figure 5 shows CD-SSB and NCD-SSB in terrestrial networks. 5G NR defines CD-SSB and NCD-SSB to assist in cell measurement. In Figure 5, SSB1 and SSB3 are CD-SSB, while SSB2 and SSB4 are NCD-SSB.

[0111] The CD-SSB carries the configuration information for the associated control resource set (CORESET 0) and the detection timing for the Type 0 Physical Downlink Control Channel Common Search Space (PDCCH CSS). Measurements related to cell selection and reselection are based on the CD-SSB.

[0112] NCD-SSB: Unlike CD-SSB, NCD-SSB does not carry the configuration of the associated control resource set (CORESET 0) or the detection timing of the Type 0 PDCCH CSS. NCD-SSB is primarily used for radio resource management and supports signal measurement for users not within the initial bandwidth portion (Initial BWP), typically terminals with reduced capability (Redcap).

[0113] It is worth noting that the existing CD-SSB and NCD-SSB are based on frequency division multiplexing, that is, CD-SSB and NCD-SSB are configured in different frequency domains and bandwidth parts (BWP). In addition, if the UE that initially accesses receives the NCD-SSB signal at the beginning, the UE will obtain the position of the CD-SSB in the frequency domain based on the K_SSB carried in the NCD-SSB (corresponding to the synchronization signal-subcarrier offset (ssb-SubcarrierOffset) in the master information block (MIB) message).

[0114] 3GPP Release 18 (R18) introduced on-demand SSB for carrier aggregation (CA). This allows for dynamic switching of SSB in secondary cells (Scells), thereby reducing network energy consumption. The SSB pattern (e.g., time and frequency domain positions) reuses the CD-SSB design used in terrestrial networks.

[0115] However, the existing NCD-SSB and on-demand SSB technologies are designed for Redcap terminals and CA scenarios, respectively, and are not used for mobility management (such as reselection and handover).

[0116] In view of this, the present application provides a communication solution to address the mobility management problems existing in NTN networks (especially LEO satellite networks), and proposes a communication solution based on flexible reference signals (especially downlink synchronization signals) to reduce mobile interruption delay and improve switching success rate.

[0117] The solution of the present application can be applied to non-ground communication network systems such as satellite communication systems, high-altitude platform communications, and drones, for example, integrated communication and navigation (IcaN) systems, global navigation satellite systems (GNSS) and ultra-dense low-orbit satellite communication systems. Satellite communication systems can be integrated with traditional mobile communication systems. For example, the mobile communication system can be a 4G communication system (for example, a long-term evolution (LTE) system), a worldwide interoperability for microwave access (WiMAX) communication system, a 5G communication system (for example, a NR system), and future mobile communication systems.

[0118] The satellite communication system includes UE and network equipment. The network equipment may include one or more satellites and ground station equipment. The ground station equipment may also be referred to as core network equipment. The satellite may be a low earth orbit (LEO) satellite, a non-geostationary earth orbit (NGEO) satellite, etc. As shown in Figure 6, it is a schematic diagram of a satellite communication system given in an embodiment of the present application. The satellite communication system includes satellite 101, satellite 102 and satellite 103. Each satellite can provide communication services, navigation services, positioning services, etc. to the terminal through multiple beams. The satellite in this scenario is a LEO satellite, and satellite 103 is connected to the ground station equipment. The satellite uses multiple beams to cover the service area, and different beams can communicate through one or more of time division, frequency division and space division. The satellite communicates wirelessly with the terminal equipment by broadcasting communication signals and navigation signals, etc., and the satellite can communicate wirelessly with the ground station equipment. The satellite mentioned in the embodiments of the present application may be a satellite base station, and may also include an orbital receiver or repeater (such as a network controlled repeater, NCR) for relaying information, or a network-side device carried on a satellite (such as an integrated access and backhaul device, IAB).

[0119] Among them, as shown in Figures 7a to 7c, there are schematic diagrams of application scenarios of satellite-ground integrated networks. The terminal on the ground can access the network through the air interface (the air interface can be various types of air interfaces, such as a 5G air interface). In Figure 7a, the base station can be deployed on the ground and connected to the ground station that communicates with the satellite; in Figure 7b, the base station can be deployed on the satellite. The satellite is connected to the ground station via a wireless link. The ground station and the ground base station are connected to the core network via wired or wireless. There can be wireless links between satellites. If the satellite only has transparent transmission and forwarding functions (that is, the corresponding base station is deployed on the ground), only transparent transmission and forwarding are realized between satellites; if the base station or part of the base station function is deployed on the satellite, the satellites can complete the signaling interaction and user data transmission between base stations as shown in Figure 7c.

[0120] Typical scenarios for terminal access provided by NTN networks include transparent payloads and regenerative payloads. Figure 8a shows a schematic diagram of a transparent forwarding scenario for satellite communications. Transparent forwarding means the satellite only performs frequency conversion forwarding, effectively acting as an analog RF repeater. Therefore, the satellite replicates the NR Uu radio interface signal from the feeder link (between the NTN gateway and the satellite) to the service link (between the satellite and the terminal), and vice versa. The satellite radio interface on the feeder link transmits the NR-Uu interface signal; that is, the satellite does not terminate the NR Uu interface signal but replicates it. The NTN gateway supports all necessary functions for forwarding the NR-Uu interface signal. Different transmission satellites can be connected to the same ground base station. Figure 8b shows a schematic diagram of a regenerative mode scenario for satellite communications. Regenerative mode refers to the satellite incorporating network equipment or a digital processing unit (DU). In this architecture, the satellite acts as a base station, regenerating signals received from the ground. The service link between the terminal and the satellite transmits the NR-Uu radio interface signal, while the feeder link between the NTN gateway and the satellite transmits the satellite radio interface signal. The SRI interface is a transmission link between the NTN gateway and the satellite. The NG interface signal is transmitted to the NTN gateway through the SRI interface, and then forwarded by the NTN gateway to the core network equipment on the ground.

[0121] The following describes the communication method provided by this application based on the above communication system:

[0122] As shown in Figure 9, a flow chart of a communication method provided in an embodiment of the present application is shown. Exemplarily, the method may include the following steps:

[0123] S901. A network device sends first information to a terminal, and the terminal receives the first information accordingly.

[0124] In this embodiment, the network device may be a satellite.

[0125] Exemplarily, the network device may send the first information through broadcast, unicast, etc. When the network device sends the first information through unicast, the first information may be sent through RRC signaling, a medium access control-control element (MAC CE), a system information block (SIB), downlink control information (DCI), etc.

[0126] The first information includes configuration information of a first reference signal. The first reference signal and the second reference signal correspond to different frequency domain resources (specifically, the first reference signal is configured outside the initial BWP; the second reference signal is configured within the initial BWP). During a first time period, the first reference signal is used for mobility management measurements of at least one first area, and the second reference signal is used for mobility management measurements of at least one second area.

[0127] For example, the first reference signal includes at least one of the following: NCD-SSB, on-demand SSB, and a reference signal that is quasi co-located (QCL) with the NCD-SSB or on-demand SSB. The reference signal that is QCL with the NCD-SSB or on-demand SSB may be, for example, a channel state information-reference signal (CSI-RS), a phase tracking reference signal (PTRS), a demodulation reference signal (DMRS), and the like.

[0128] The second reference signal may be CD-SSB, for example.

[0129] The configuration information of the first reference signal includes at least one of the following: the frequency or polarization mode of the first reference signal, the period of the first reference signal, the time domain offset between the first reference signal and the second reference signal, the pattern of the first reference signal, the access timing associated with the first reference signal, and the measurement configuration of the first reference signal.

[0130] Taking the first reference signal as NCD-SSB as an example, NCD-SSB is a long-period SSB, configured outside the initial BWP, not restricted by the synchronization raster frequency, used for mobility management measurements, and can carry dedicated random access occasion (RO) resources. The configuration information of NCD-SSB includes at least one of the following:

[0131] (1) Frequency and / or polarization of NCD-SSB. For example, the frequency of NCD-SSB can be an absolute radio frequency channel number (ARFCN). Polarization modes include linear polarization, elliptical polarization, right-hand circularized polarization (RHCP), and left-hand circularized polarization (LHCP).

[0132] (2) NCD-SS period. For example, the NCD-SS period can be any of the following periods: {s1, s5, s10, s20, s40, s80, s160, s320, s640, spare}.

[0133] (3) Time offset between NCD-SSB and CD-SSB. This time offset is used to adjust the starting position offset between NCD-SSB and CD-SSB. It can be configured at the frame, time slot, symbol, etc. levels. The typical value is {ms5,ms10,ms20,ms40,ms80,ms160,ms320,ms640,spare}.

[0134] (4) NCD-SSB pattern: For example, multiple NCD-SSBs can be configured in each bandwidth part (per BWP) using the synchronization signal position in burst (ssb-PositionsInBurst) information element for handover of terminals in different areas.

[0135] (5) RO configuration associated with NCD-SSB, including time domain information, frequency domain information, and the mapping relationship between access opportunity / preamble (RO / Preamble) and NCD-SSB index (NCD-SSB index).

[0136] (6) NCD-SSB measurement configuration, namely the synchronization signal measurement timing configuration (SMTC), includes the measurement period, measurement start position, measurement gap, measurement effective time length, etc.

[0137] As shown in Figure 10, it is a schematic diagram of NCD-SSB and CD-SSB as examples of an embodiment of the present application. CD-SSB reuses the existing short-cycle design (its cycle is cycle 1), while NCD-SSB and CD-SSB perform frequency division or polarization domain multiplexing (corresponding to left-hand circular polarization, right-hand circular polarization, elliptical polarization, linear polarization, etc.). NCD-SSB adopts a long-cycle design (its cycle is cycle 2), and there is a certain time offset between it and CD-SSB (the time offset value is used to adjust the time domain position of NCD-SSB). In addition, NCD-SSB can be associated with a dedicated RO resource for terminal access after cell switching.

[0138] S902: The network device sends a first reference signal to the terminal based on the configuration information. Correspondingly, the terminal receives the first reference signal based on the configuration information.

[0139] According to the configuration of the first reference signal, in the first time period, the first reference signal is used for mobility management measurement of at least one first area, and the second reference signal is used for mobility management measurement of at least one second area.

[0140] Assuming that the terminal is located in one of the at least one first area within the first time period, the network device sends a first reference signal to the terminal based on the configuration information.

[0141] As shown in Figure 11, it is a schematic diagram of mobility management based on NCD-SSB according to an embodiment of the present application. The network device (such as satellite STA-2, which can use one or more beams / cells to serve several areas) uses CD-SSB to ensure the initial access of terminals in areas 1, 2, 3, and 4, and uses NCD-SSB to ensure the mobility management measurement of one or more terminals in areas 5 and 7.

[0142] S903. The terminal sends the second information to the network device. Correspondingly, the network device receives the second information.

[0143] After receiving the first reference signal, the terminal measures the first reference signal and sends second information to the network device. The second information indicates the measurement result of the first reference signal. The terminal and the network device can then refer to the process of Figure 4 to perform the subsequent handover access process.

[0144] According to a communication method provided in an embodiment of the present application, by configuring a first reference signal for mobility management measurement of at least one first area, when the terminal is located in any one of the at least one first area, mobility management measurement can be performed based on the first reference signal, thereby reducing the mobile interruption delay and improving the switching success rate.

[0145] In a further embodiment, the first information may further include configuration information of a third reference signal. The third reference signal is used for mobility management measurements of at least one third area. The third reference signal corresponds to different frequency domain resources than the second reference signal, and the third reference signal differs from the first reference signal in at least one of the following: a starting position in the time-frequency domain, a frequency, a polarization mode, a period, an access timing, and a preamble resource.

[0146] Exemplarily, the network device may deliver configurations related to multiple reference signals (here taking the first reference signal and the third reference signal as an example) by broadcast, unicast, etc. Among them, the configuration of the third reference signal may refer to the configuration of the first reference signal mentioned above. In addition, taking the first reference signal and the third reference signal as NCD-SSB as an example, the configuration information of the first reference signal and the third reference signal may also include:

[0147] NCD-SSB measurement validation configuration, such as measurement events triggered based on location and / or timing information, to initiate measurements, measurement result reporting, switching, etc. corresponding to different NCD-SSBs.

[0148] Among them, the location-based measurement event includes a reference location and a distance threshold. When the distance between the terminal and the reference location is greater than or equal to the distance threshold, the corresponding NCD-SSB measurement is performed; or when the distance between the terminal and the first reference location is greater than or equal to the first distance threshold and / or the distance between the terminal and the second reference location is less than or equal to the second distance threshold, the corresponding NCD-SSB measurement is performed.

[0149] Timing-based measurement event: including a time period [t1, t2] or [t1, t-offset], where t1 is the start time, t2 is the end time, and t-offset is the time offset relative to the start time. The start time / end time, etc. can be expressed in universal coordinated time (UTC). When the terminal determines that it is in the time period corresponding to the timing according to its own clock, the measurement of the corresponding NCD-SSB is started.

[0150] As shown in Figure 12, it is a schematic diagram of two NCD-SSBs and CD-SSBs used as examples in an embodiment of the present application. CD-SSB reuses the existing short-cycle design (its cycle is cycle 1), while NCD-SSB and CD-SSB perform frequency division or polarization domain multiplexing (corresponding to left-hand circular polarization, right-hand circular polarization, elliptical polarization, linear polarization, etc.). The first NCD-SSB adopts a long-cycle design (its cycle is cycle A) and has a certain time offset with CD-SSB (Time-Offset-A, used to adjust the time domain position of NCD-SSB). In addition, the first NCD-SSB can be associated with a dedicated RO resource for terminal access after cell switching; the second NCD-SSB adopts a long-cycle design (its cycle is cycle B) and has a certain time offset with CD-SSB (Time-Offset-B, used to adjust the time domain position of NCD-SSB). In addition, the second NCD-SSB can be associated with a dedicated RO resource (which may be different from the RO corresponding to the first NCD-SSB) for terminal access after cell switching.

[0151] As shown in Figure 13, it is a schematic diagram of another example of mobility management based on NCD-SSB in an embodiment of the present application. The network device (such as satellite SAT-2, which can use one or more beams / cells to serve several areas) uses CD-SSB to ensure the initial access of terminals in areas 1, 2, 3, and 4, and uses the first NCD-SSB to ensure the mobility management measurement of at least one terminal in area 5 and area 7; and uses the second NCD-SSB to ensure the mobility management measurement of at least one terminal in area 11. The first NCD-SSB and the second NCD-SSB use different configurations (such as starting position, frequency, polarization mode, period, RO resources, and Preamble resources).

[0152] When the terminal triggers measurement based on location and / or timing information, according to the current area of ​​the terminal, for example, when the terminal is in area 5 or area 7, the network device sends the first NCD-SSB according to the triggering event or periodically, and the terminal measures the first NCD-SSB to obtain the measurement result and reports it to the network device; for another example, when the terminal is in area 11, the network device sends the second NCD-SSB according to the triggering event or periodically, and the terminal measures the first NCD-SSB to obtain the measurement result and reports it to the network device.

[0153] FIG14 is a flow chart of another communication method provided in an embodiment of the present application. Exemplarily, the method may include the following steps:

[0154] S1401: A network device sends first information to a terminal, and the terminal receives the first information accordingly.

[0155] The first information includes configuration information of a first reference signal. The first reference signal and the second reference signal correspond to different frequency domain resources (specifically, the first reference signal is configured outside the initial BWP; the second reference signal is configured within the initial BWP). During a first time period, the first reference signal is used for mobility management measurements of at least one first area, and the second reference signal is used for mobility management measurements of at least one second area.

[0156] For the specific implementation of this step, reference may be made to step S901 of the embodiment shown in FIG9 , and details thereof will not be repeated here.

[0157] Different from the embodiment shown in FIG. 9 , the configuration information of the first reference signal may further include frequency and / or polarization information (eg, frequency offset / polarization offset (FrequencyOffset / PolarizationOffset)) of the second reference signal.

[0158] S1402: The network device sends a first reference signal to the terminal based on the configuration information. Correspondingly, the terminal receives the first reference signal based on the configuration information.

[0159] For the specific implementation of this step, reference may be made to step S902 of the embodiment shown in FIG9 , and details thereof will not be repeated here.

[0160] S1403: The terminal sends the second information to the network device, and the network device receives the second information accordingly.

[0161] The second information is used to indicate a measurement result of the first reference signal.

[0162] For the specific implementation of this step, reference may be made to step S903 of the embodiment shown in FIG9 , and details thereof will not be repeated here.

[0163] During the second time period, the first reference signal is used for mobility management measurement of at least one fourth area, and the second reference signal is used for mobility management measurement of at least one fifth area, and the terminal is located in one of the at least one fifth area during the second time period. Furthermore, the method may further include the following steps:

[0164] S1404. The terminal retunes to the frequency point or polarization domain corresponding to the second reference signal.

[0165] Taking the first reference signal as NCD-SSB and the second reference signal as CD-SSB as an example, within the first time period, the first reference signal used for mobility management measurement of at least one first area may be a first NCD-SSB, and the second reference signal used for mobility management measurement of at least one second area may be a first CD-SSB; within the second time period, the first reference signal used for mobility management measurement of at least one fourth area may be a second NCD-SSB, and the second reference signal used for mobility management measurement of at least one fifth area may be a second CD-SSB.

[0166] During the second time period, the terminal is located in one of the at least one fifth area. Therefore, the terminal needs to be retuned to the frequency point or polarization domain corresponding to the second reference signal.

[0167] Exemplarily, a terminal in an RRC inactive state (inactive) / idle state can determine whether it is NCD-SSB based on whether the frequency of the SSB is in the synchronization grid, or whether the configuration information of the first reference signal includes FrequencyOffset / PolarizationOffset (if the frequency of the SSB is not in the synchronization grid, or the configuration information of the first reference signal includes FrequencyOffset / PolarizationOffset, it is determined to be NCD-SSB).

[0168] S1405. The network device sends a second reference signal to the terminal based on the configuration information. Correspondingly, the terminal receives the second reference signal based on the configuration information.

[0169] If it is determined to be NCD-SSB, the associated CD-SSB is obtained according to FrequencyOffset / PolarizationOffset.

[0170] S1406: The terminal sends the third information to the network device, and the network device receives the third information accordingly.

[0171] The third information is used to indicate a measurement result of the second reference signal.

[0172] In the above example, the terminal receives the CD-SSB, measures the CD-SSB, and obtains a measurement result.

[0173] S1407: The network device broadcasts remaining minimum system information (RMSI). Correspondingly, the terminal receives the RMSI.

[0174] After receiving the CD-SSB, the terminal obtains the corresponding RMSI to perform subsequent synchronization and access processes.

[0175] As shown in Figure 15, it is a schematic diagram of a terminal retuning in an example of an embodiment of the present application. On the network side, SAT-1 uses the first CD-SSB service area 1-4 and the first NCD-SSB service area 5 and 7 at the first moment (such as Time T1); at the second moment (such as Time T1), it uses the second CD-SSB service area 2, 4, 5 and 7 and the second NCD-SSB service area 6 and 8. On the terminal side, UE-1 in area 5 needs to retune from NCD-SSB to the frequency / polarization corresponding to CD-SSB and obtain the subsequent RMSI.

[0176] According to a communication method provided in an embodiment of the present application, when a terminal is in an area corresponding to a second reference signal, it is necessary to re-tune the terminal to the frequency point or polarization domain corresponding to the second reference signal so that the terminal can accurately receive the second reference signal, and can perform mobility management measurements based on the second reference signal, thereby reducing mobile interruption delay and improving the switching success rate.

[0177] In another embodiment, the first reference signal may also be an on-demand SSB, wherein the CD-SSB is used for mobility management measurement of the primary cell (PCell), and the on-demand SSB is used for mobility management measurement of the secondary cell (SCell).

[0178] The network device can deliver the CD-SSB configuration of the PCell and the on-demand SSB configuration of at least one SCell related to mobility management through broadcast, unicast, etc. The on-demand SSB can be dynamically turned on and off to adapt to different measurement requirements.

[0179] Among them, PCell can reuse the existing CD-SSB configuration.

[0180] The SCell is dedicated to handover-related measurements. The Scell's on-demand SSB can be disabled on demand (similar to the on-demand mechanism used for network energy conservation). The on-demand SSB pattern includes the SSB period, on-duration, starting position, and the associated RO configuration (optional). The SSB-time-offset field indicates the time offset between the Scell's on-demand SSB and the PCell's CD-SSB. For more information, refer to the NCD-SSB configuration described above.

[0181] The terminal receives reference signals and measurement configurations related to the Pcell and at least one Scell. After completing mobility management-related measurements, the terminal selects the associated Pcell based on the synchronization signal time offset (SSB-time-offset) and completes cell camping. It is worth noting that handover-related RO resources can also be configured on the Pcell.

[0182] As shown in Figure 16, it is a schematic diagram of mobility management based on flexible synchronization signals according to an embodiment of the present application. On the network side, at the first moment (e.g., time T1), SAT-1 uses a CD-SSB-based Pcell to serve areas 1-4, and an on-demand SSB-based Scell ​​to serve areas 5 and 7. At the second moment (e.g., time T2), the CD-SSB-based Pcell serves areas 2, 4, 5, and 7, and the on-demand SSB-based Scell ​​serves areas 6 and 8. On the terminal side, UE-1 in area 5 needs to be handed over from the Scell ​​to the associated Pcell.

[0183] The above description mainly describes the solutions provided by the embodiments of the present application from the perspective of the interaction between a terminal and a network device. Accordingly, the embodiments of the present application also provide a communication device, which is used to implement the various methods described above. The communication device can be the terminal in the above method embodiments, or a component that can be used for a terminal; alternatively, the communication device can be the network device in the above method embodiments, or a component that can be used for a network device. It will be understood that, in order to implement the above functions, the communication device includes hardware structures and / or software modules corresponding to performing each function. Those skilled in the art will readily appreciate that, in combination with the various exemplary units and algorithm steps described in the embodiments disclosed herein, the present application can be implemented in hardware or a combination of hardware and computer software. Whether a function is implemented in hardware or in a hardware-driven manner by computer software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this application.

[0184] In the embodiment of the present application, the functional modules of the communication device can be divided according to the above method embodiment. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing unit. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. In actual implementation, there may be other division methods.

[0185] Based on the same concept of the above communication method, the present application also provides the following communication device:

[0186] As shown in FIG17 , a schematic diagram of the structure of a communication device provided in an embodiment of the present application is shown. The communication device 1700 includes a transceiver unit 1701 and a processing unit 1702 .

[0187] When the communication device is used to implement the functions of the terminal in the above-mentioned method embodiment, the transceiver unit 1701 is used to execute one or more of the operations performed by the terminal in steps S901 to S903 in the embodiment as shown in Figure 9; or, the transceiver unit 1701 is used to execute one or more of the operations performed by the terminal in steps S1401 to S1403 and S1405 to S1407 in the embodiment as shown in Figure 14, and the processing unit 1702 is used to execute step S1404 in the embodiment as shown in Figure 14.

[0188] When the communication device is used to implement the functions of the network device in the above method embodiment, the transceiver unit 1701 is used to execute one or more of the operations performed by the network device in steps S901 to S903 in the embodiment as shown in Figure 9; or, the transceiver unit 1701 is used to execute one or more of the operations performed by the network device in steps S1401 to S1403 and S1405 to S1407 in the embodiment as shown in Figure 14.

[0189] For the specific implementation of the above-mentioned transceiver unit 1701 and the processing unit 1702, reference may be made to the description in the above-mentioned method embodiment.

[0190] As shown in Figure 18, it is a structural diagram of another communication device provided in an embodiment of the present application, and the communication device 1800 includes one or more processors 1801 (one processor is illustrated in the figure). Optionally, the communication device 1800 may further include an interface circuit 1802 (represented by a dotted line in the figure), and the processor 1801 and the interface circuit 1802 are coupled to each other. It will be understood that the interface circuit 1802 can be a transceiver or an input / output interface. Optionally, the communication device 1800 may further include a memory 1803 (represented by a dotted line in the figure). The memory 1803 is used to store instructions executed by the processor 1801, or to store input data required for the processor 1801 to run the instruction, or to store data generated after the processor 1801 runs the instruction.

[0191] In which, when the communication device is used to implement the function of the terminal in the above method embodiment, the interface circuit 1802 is used to execute one or more of the operations performed by the terminal in steps S901 to S903 in the embodiment shown in Figure 9; or, the interface circuit 1802 is used to execute one or more of the operations performed by the terminal in steps S1401 to S1403, S1405 to S1407 in the embodiment shown in Figure 14, and the processor 1801 is used to execute step S1404 in the embodiment shown in Figure 14.

[0192] When the communication device is used to implement the functions of the network device in the above method embodiment, the interface circuit 1802 is used to execute one or more of the operations performed by the network device in steps S901 to S903 in the embodiment as shown in Figure 9; or, the interface circuit 1802 is used to execute one or more of the operations performed by the network device in steps S1401 to S1403 and S1405 to S1407 in the embodiment as shown in Figure 14.

[0193] When the communication device is a chip used in a terminal, the chip implements the terminal functions in the above method embodiments. The chip receives information from other modules in the terminal (such as a radio frequency module or antenna), which is information sent by the network device to the terminal; or the chip sends information to other modules in the terminal (such as a radio frequency module or antenna), which is information sent by the terminal to the network device.

[0194] When the communication device is a chip used in a network device, the chip implements the functions of the network device in the above method embodiments. The chip receives information from other modules in the network device (such as a radio frequency module or antenna), and the information is sent by the terminal to the network device; or the chip sends information to other modules in the network device (such as a radio frequency module or antenna), and the information is sent by the network device to the terminal.

[0195] In addition, it should be noted that the aforementioned transceiver unit and / or processing unit may be implemented through virtual modules, for example, the processing unit may be implemented through a software function unit or a virtual device, and the transceiver unit may be implemented through a software function or a virtual device. Alternatively, the processing unit or transceiver unit may also be implemented through a physical device, for example, if the device is implemented using a chip / chip circuit, the transceiver unit may be an input / output circuit and / or a communication interface, performing input operations (corresponding to the aforementioned receiving operations) and output operations (corresponding to the aforementioned sending operations); the processing unit is an integrated processor or microprocessor or integrated circuit.

[0196] The division of modules in this application is illustrative and represents only a logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional modules in the examples of this application may be integrated into a single processor, exist physically as separate modules, or two or more modules may be integrated into a single module. The aforementioned integrated modules may be implemented in either hardware or software functional modules.

[0197] It is understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0198] An embodiment of the present application further provides a computer-readable storage medium, in which a computer program or instruction is stored. When the computer program or instruction is executed, the method in the above embodiment is implemented.

[0199] An embodiment of the present application further provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute the method in the above embodiment.

[0200] An embodiment of the present application also provides a communication system, including the above-mentioned communication device.

[0201] The present application also provides a circuit, which is coupled to a memory and is used to execute the method shown in the above embodiment. The circuit may include a chip circuit.

[0202] When the above-mentioned communication device is a module applied to a network device, the network device module implements the functions of the network device in the above-mentioned method embodiment. The network device module receives information from other modules in the network device (such as a radio frequency module or an antenna), and the information is sent by the terminal to the network device; or, the network device module sends information to other modules in the network device (such as a radio frequency module or an antenna), and the information is sent by the network device to the terminal. The network device module here can be a baseband chip of the network device, or a CU, DU or other module, or a device under the O-RAN architecture, such as an open CU, open DU and other devices.

[0203] It should be noted that the above units or one or more of the units can be implemented by software, hardware, or a combination of the two. When any of the above units or units is implemented by software, the software exists in the form of computer program instructions and is stored in a memory, and a processor can be used to execute the program instructions and implement the above method flow.

[0204] In this application, a processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or all or part of the circuitry in the aforementioned devices used to implement processing functions, which may implement or execute the various methods, steps, and logic block diagrams disclosed in this application. A general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the methods disclosed in this application may be directly implemented as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0205] When the above units or units are implemented in hardware, the hardware can be any one or any combination of a CPU, a microprocessor, a digital signal processing (DSP) chip, a microcontroller unit (MCU), an artificial intelligence processor, an ASIC, a SoC, an FPGA, a PLD, a dedicated digital circuit, a hardware accelerator or a non-integrated discrete device, which can run the necessary software or not rely on the software to execute the above method flow.

[0206] Optionally, an embodiment of the present application further provides a chip system, comprising: at least one processor and an interface, wherein the at least one processor is coupled to a memory via the interface, and when the at least one processor executes a computer program or instruction in the memory, the chip system executes the method in any of the above method embodiments. Optionally, the chip system may be composed of a chip, or may include a chip and other discrete devices, which is not specifically limited in the embodiments of the present application.

[0207] The memory in the present application may also be a circuit or any other device capable of implementing a storage function for storing program instructions and / or data. A memory is any other medium that can be used to carry or store a desired program code in the form of an instruction or data structure and can be accessed by a computer, but is not limited thereto. For example, the memory may be a non-volatile memory, such as a digital versatile disc (DVD), a hard disk drive (HDD), or a solid-state drive (SSD), or a volatile memory, such as a random-access memory (RAM).

[0208] The terms "including" and "having" and any variations thereof mentioned in the above description of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes other steps or units that are not listed, or optionally includes other steps or units that are inherent to these processes, methods, products or devices. It should be noted that, in this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any method or design described in this application as "exemplary" or "for example" should not be interpreted as being more preferred or more advantageous than other methods or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete way.

[0209] It should be understood that in the description of this application, unless otherwise specified, " / " indicates that the objects associated with each other are in an "or" relationship. For example, A / B can mean A or B; where A and B can be singular or plural. Also, in the description of this application, unless otherwise specified, "multiple" means two or more than two. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or plural. In addition, to facilitate the clear description of the technical solutions of the embodiments of this application, in the embodiments of this application, words such as "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. Those skilled in the art will understand that words such as "first" and "second" do not limit the quantity or execution order, and words such as "first" and "second" do not necessarily mean different. At the same time, in the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner to facilitate understanding.

[0210] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, network device or data center to another website, computer, network device or data center via wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means.

[0211] Although the present application is described herein with reference to various embodiments, those skilled in the art may understand and implement other variations of the disclosed embodiments by reviewing the drawings, the disclosure, and the appended claims in the course of implementing the claimed application. In the claims, a single processor or other unit may implement several functions recited in the claim. The fact that certain measures are recited in different dependent claims does not mean that these measures cannot be combined to produce advantageous effects.

[0212] It is understood that the various numbers used in the embodiments of this application are merely for ease of description and are not intended to limit the scope of the embodiments of this application. The order of the sequence numbers of the above-mentioned processes does not necessarily imply a specific order of execution; the order of execution of the processes should be determined by their functions and inherent logic.

[0213] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0214] The components in the device of the embodiment of the present application can be merged, divided, or deleted according to actual needs. Those skilled in the art can combine or combine the different embodiments and features of the different embodiments described in this specification.

[0215] In this application, under the premise of no logical contradiction, the examples can reference each other, for example, the methods and / or terms between method embodiments can reference each other, for example, the functions and / or terms between device embodiments can reference each other, for example, the functions and / or terms between device examples and method examples can reference each other.

Claims

1. A communication method, characterized in that: The method comprises: The terminal receives first information, where the first information includes configuration information of a first reference signal, the first reference signal and a second reference signal correspond to different frequency domain resources, and within a first time period, the first reference signal is used for mobility management measurement of at least one first area, and the second reference signal is used for mobility management measurement of at least one second area; receiving, by the terminal, the first reference signal based on the configuration information, wherein the terminal is located in one of the at least one first area during the first time period; The terminal sends second information, where the second information is used to indicate a measurement result of the first reference signal.

2. The method according to claim 1, wherein The configuration information of the first reference signal includes at least one of the following: the frequency or polarization mode of the first reference signal, the period of the first reference signal, the time domain offset value between the first reference signal and the second reference signal, the pattern of the first reference signal, the access timing associated with the first reference signal, and the measurement configuration of the first reference signal.

3. The method according to claim 1 or 2, wherein: In a second time period, the first reference signal is used for mobility management measurement of at least one fourth area, and the second reference signal is used for mobility management measurement of at least one fifth area, and the terminal is located in one of the at least one fifth area in the second time period. The method further includes: retuning, by the terminal, to a frequency point or polarization domain corresponding to the second reference signal; receiving, by the terminal, the second reference signal; The terminal sends third information, where the third information is used to indicate a measurement result of the second reference signal; The terminal receives remaining minimum system information RMSI.

4. The method according to claim 3, wherein The configuration information of the first reference signal includes frequency and / or polarization information of the second reference signal.

5. The method according to any one of claims 1 to 4, wherein The first reference signal includes at least one of the following: a non-cell defined-synchronization signal NCD-SSB, a flexible synchronization signal, and a reference signal that has a quasi-co-location relationship with the NCD-SSB or the on-demand SSB.

6. A communication method, characterized in that: The method comprises: The network device sends first information, where the first information includes configuration information of a first reference signal, the first reference signal and a second reference signal correspond to different frequency domain resources, and within a first time period, the first reference signal is used for mobility management measurement of at least one first area, and the second reference signal is used for mobility management measurement of at least one second area; The network device sends the first reference signal based on the configuration information; The network device receives second information from a terminal, wherein the second information is used to indicate a measurement result of the first reference signal, the terminal is located at a first wavelength, and the first wavelength belongs to the at least one first area within the first time period.

7. The method according to claim 6, wherein The configuration information of the first reference signal includes at least one of the following: the frequency or polarization mode of the first reference signal, the period of the first reference signal, the time domain offset value between the first reference signal and the second reference signal, the pattern of the first reference signal, the access timing associated with the first reference signal, and the measurement configuration of the first reference signal.

8. The method according to claim 6 or 7, wherein: The first information also includes configuration information of a third reference signal, where the third reference signal is used for mobility management measurement of at least one third area. The third reference signal and the second reference signal correspond to different frequency domain resources, and the third reference signal differs from the first reference signal in at least one of the following: starting position, frequency, polarization mode, period, access timing, and preamble resources in the time-frequency domain.

9. The method according to any one of claims 6 to 8, wherein In a second time period, the first reference signal is used for mobility management measurement of at least one fourth area, and the second reference signal is used for mobility management measurement of at least one fifth area, and the first beam position belongs to the at least one fifth area in the second time period. The method further includes: The network device sends the second reference signal; The network device receives third information, where the third information is used to indicate a measurement result of the second reference signal; The network device sends remaining minimum system information RMSI.

10. The method according to claim 9, wherein The configuration information of the first reference signal includes frequency and / or polarization information of the second reference signal.

11. The method according to any one of claims 6 to 10, wherein: The first reference signal includes at least one of the following: a non-cell defined synchronization signal NCD-SSB, an on-demand synchronization signal SSB, and a reference signal that has a quasi-co-location relationship with the NCD-SSB or the on-demand SSB.

12. A communication device, characterized in that: The apparatus comprises a unit for implementing the method according to any one of claims 1 to 5, or the apparatus comprises a unit for implementing the method according to any one of claims 6 to 11.

13. A communication device, characterized in that: The device comprises a processor, a memory, and instructions stored in the memory and executed on the processor, wherein when the instructions are executed, the communication device executes the method according to any one of claims 1 to 5, or executes the method according to any one of claims 6 to 11.

14. A communication system, characterized in that: The method comprises a first communication device and a second communication device, wherein the first communication device is configured to execute the method according to any one of claims 1 to 5, and the second communication device is configured to execute the method according to any one of claims 6 to 11.

15. A computer-readable storage medium, characterized in that The computer-readable storage medium includes instructions, and when the instructions are executed by a processor, the method according to any one of claims 1 to 11 is implemented.

16. A computer program product comprising instructions, characterized in that When the instruction is executed on a communication device, the communication device is caused to execute the method according to any one of claims 1 to 11.

17. A chip, characterized in that: The chip is used to execute the method according to any one of claims 1 to 11.

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