Access method and apparatus for non-terrestrial network, computer readable storage medium, computer program product

Abstract

An access method and device for non-terrestrial networks, a computer readable storage medium, and a computer program product, relate to the technical field of communication. The method comprises: in response to a service being triggered, a UE sends a cell access request to a network device of a non-terrestrial network according to the service, and correspondingly, the network device of the non-terrestrial network receives the cell access request, wherein different services are associated with different types of non-terrestrial networks, and the cell access request is used to request access to a cell of the non-terrestrial network. Through the scheme, the UE can access a more suitable non-terrestrial network to transmit MT or MO services according to the service demand, thereby improving the communication quality.

Description

Technical Field

[0001] This application relates to the field of communication technology, and more specifically to an access method and apparatus for non-terrestrial networks, a computer-readable storage medium, and a computer program product. Background Technology

[0002] With the rapid development of technology, global communication demands are increasing, especially in remote and underserved areas where traditional terrestrial networks (TN) often struggle to provide coverage. To address this, satellite-to-ground communication technology based on the Fifth-Generation mobile communications (5G) standard has emerged, constructing Non-Terrestrial Networks (NTNs). NTNs utilize non-terrestrial communication infrastructure such as satellites and high-altitude platforms (e.g., drones, stratospheric balloons) to achieve global communication coverage. They provide reliable, secure, and high-bandwidth connectivity to areas without terrestrial network coverage, significantly expanding the reach of communication networks.

[0003] Currently, when User Equipment (UE) is conducting communication services, if the signal quality of the terrestrial network is poor or the UE is outside the TN's signal coverage area, the UE can access the NTN to ensure smooth service completion. However, as satellite communication evolves towards hybrid satellite networks (also known as multi-track satellite networks), the network access logic currently used by UEs has flaws, which may cause the UE to access an unsuitable NTN, thus affecting communication quality and hindering service implementation. Summary of the Invention

[0004] The technical problem addressed in this application is how to improve communication quality.

[0005] This application provides an access method for non-terrestrial networks, comprising: in response to a service being triggered, sending a cell access request to a network device in the non-terrestrial network according to the service; wherein different services are associated with different types of non-terrestrial networks.

[0006] Optionally, sending a cell access request to a network device in a non-terrestrial network according to the service includes: sending a cell access request to a network device in a non-terrestrial network associated with the service, wherein the type of the non-terrestrial network associated with the service is the network type associated with the service.

[0007] Optionally, sending a cell access request to a network device in a non-terrestrial network according to the service includes: determining a parameter configuration based on the service, wherein the probability of cell reselection based on the parameter configuration is higher than the probability of cell reselection to a non-terrestrial network associated with the service, and the parameter configuration is used for cell reselection; performing cell reselection using the parameter configuration and sending a cell access request to the network device to which the selected cell belongs.

[0008] Optionally, different services require different parameter configurations.

[0009] Optionally, the parameter configuration includes: the quality offset of adjacent cells and / or the cell reselection priority during cell reselection.

[0010] Optionally, the mapping between service and non-terrestrial network types is pre-configured and / or network-indicated.

[0011] Optionally, the access method further includes: receiving indication information, the indication information being used to indicate the service, or the indication information being used to indicate a non-terrestrial network associated with the service.

[0012] Optionally, the indication information is carried in any of the following messages: paging early indication message, downlink control signaling for paging, and paging message.

[0013] Optionally, the access method further includes: receiving a paging message, wherein the paging timing of the paging message is used to indicate the service or a non-terrestrial network associated with the service.

[0014] Optionally, the paging timing may be associated with different resources, corresponding to different services or different types of non-terrestrial networks.

[0015] Optionally, a single paging cycle may include multiple paging opportunities, with different paging opportunities corresponding to different services or different types of non-terrestrial networks.

[0016] Optionally, the dimension that distinguishes different types of non-terrestrial networks may include at least altitude.

[0017] Optionally, the service is characterized based on at least one of the following parameters: quality of service, quality of service flow identifier, bearer identifier, and logical channel identifier.

[0018] Optionally, the UE resides in the geostationary orbit satellite network before the service is triggered.

[0019] Optionally, the UE is in an idle state before the service is triggered.

[0020] Optionally, the services include MO services and MT services.

[0021] This application embodiment also provides an access method for non-terrestrial networks, including: sending indication information, the indication information being used to indicate a service, or the indication information being used to indicate a non-terrestrial network associated with the service; wherein different services are associated with different types of non-terrestrial networks.

[0022] Optionally, the type of the non-terrestrial network associated with the service is the network type associated with the service.

[0023] Optionally, the indication information may include the service or a non-terrestrial network associated with the service.

[0024] Optionally, the sending indication information includes: sending a paging message, wherein the paging timing of the paging message is used to indicate the service or a non-terrestrial network associated with the service.

[0025] Optionally, the paging timing may be associated with different resources, corresponding to different services or different types of non-terrestrial networks.

[0026] Optionally, a single paging cycle may include multiple paging opportunities, with different paging opportunities corresponding to different services or different types of non-terrestrial networks.

[0027] Optionally, the access method further includes: sending configuration information, the configuration information being used to configure the mapping relationship between service and non-terrestrial network types.

[0028] Optionally, the dimension that distinguishes different types of non-terrestrial networks may include at least altitude.

[0029] Optionally, the service is characterized based on at least one of the following parameters: quality of service, quality of service flow identifier, bearer identifier, and logical channel identifier.

[0030] Optionally, the services include MO services and MT services.

[0031] This application embodiment also provides an access method for a non-terrestrial network, including: receiving a cell access request, wherein the cell access request is used to request access to a cell in a non-terrestrial network; wherein different services are associated with different types of non-terrestrial networks.

[0032] Optionally, the dimension that distinguishes different types of non-terrestrial networks may include at least altitude.

[0033] Optionally, the service is characterized based on at least one of the following parameters: quality of service, quality of service flow identifier, bearer identifier, and logical channel identifier.

[0034] Optionally, the services include MO services and MT services.

[0035] This application embodiment also provides an access device for a non-terrestrial network, including: a sending module, which, in response to a service being triggered, sends a cell access request to a network device in the non-terrestrial network according to the service; wherein different services are associated with different types of non-terrestrial networks.

[0036] This application embodiment also provides an access device for non-terrestrial networks, including: a sending module, used to send indication information, the indication information being used to indicate a service, or the indication information being used to indicate a non-terrestrial network associated with the service; wherein different services are associated with different types of non-terrestrial networks.

[0037] This application embodiment also provides an access device for a non-terrestrial network, including: a receiving module for receiving a cell access request, wherein the cell access request is for requesting access to a cell in a non-terrestrial network; wherein different services are associated with different types of non-terrestrial networks.

[0038] This application also provides a computer-readable storage medium, which is a non-volatile or non-transient storage medium, storing a computer program thereon, the computer program being executed by a computer to perform the steps of the above method.

[0039] This application also provides an access device for a non-terrestrial network, including a memory and a processor. The memory stores a computer program that can run on the processor, and the processor executes the steps of the above-described method when running the computer program.

[0040] This application also provides a computer program product, including a computer program / instructions, which, when executed by a computer, implement the steps of the above-described method.

[0041] This application also provides a communication system, including a network device and a UE for performing the above-described methods.

[0042] This application also provides a chip (or access device for non-terrestrial networks) that stores a computer program, which, when executed by the chip, implements the steps of the above method.

[0043] This application also provides a system chip, which includes at least one processor and an interface circuit. The interface circuit and the at least one processor are interconnected via a line. The at least one processor is used to execute instructions to perform the above-described method.

[0044] Compared with the prior art, the technical solution of this application embodiment has the following beneficial effects:

[0045] This application provides an access method for a non-terrestrial network, comprising: in response to a service being triggered, a UE sending a cell access request to a network device in the non-terrestrial network according to the service, and correspondingly, the network device in the non-terrestrial network receiving the cell access request, wherein different services are associated with different types of non-terrestrial networks, and the cell access request is used to request access to a cell in the non-terrestrial network.

[0046] Existing technologies do not fully consider the factors that should be taken into account when a UE accesses a network, which may result in the UE accessing a network that is unsuitable for the service to be transmitted, affecting service efficiency and communication quality. In contrast, this application, based on the relationship between the type of non-terrestrial network and services, enables the UE to select the most suitable non-terrestrial network to access and transmit the triggered service when a specific service is triggered. This helps improve the compatibility between services and non-terrestrial networks, ensuring smooth service operation, improving service implementation reliability, and enhancing communication quality.

[0047] In the MO service scenario, the UE sends a cell access request to the non-terrestrial network associated with the triggered MO service. Different services are associated with different types of non-terrestrial networks, and the type of the non-terrestrial network associated with the triggered MO service is the network type associated with the MO service. After successfully accessing a cell in the non-terrestrial network, the UE initiates the MO service. Alternatively, the UE performs cell reselection using parameters determined based on the triggered MO service and sends a cell access request to the network device of the selected cell. Based on the parameter configuration, the probability of reselecting a cell and camping on the non-terrestrial network associated with the service is higher than the probability of camping on other types of non-terrestrial networks. After successfully accessing a cell in the non-terrestrial network, the UE initiates the MO service. Therefore, when initiating an MO service, the UE can proactively select a more suitable non-terrestrial network for access based on the service to be transmitted, ensuring that the accessed non-terrestrial network meets service requirements in terms of characteristics such as latency.

[0048] In the MT (Mobile Transmission) service scenario, the UE initially resides in an idle state and camps on the GEO (Geostationary Earth) network. The GEO network equipment sends indication information to the UE, which in turn receives this information. This indication information is used to indicate a service or a non-terrestrial network associated with the service. The UE preferentially accesses the cell of the non-terrestrial network indicated by the indication information. After the UE accesses the cell of the non-terrestrial network, the network equipment of that cell communicates with the UE to initiate the MT service. Preferred access means that the UE can perform cell reselection, and the cell of the non-terrestrial network indicated by the indication information has a higher reselection priority, but the cell of the non-terrestrial network indicated by the indication information may not be selected. Therefore, the UE camps on the GEO network in an idle state to avoid repeated synchronization and reduce unnecessary power consumption. When there is an MT service that the UE needs to receive on the network side, the UE is then triggered to access a suitable non-terrestrial network for this MT service. This reduces UE power consumption while ensuring the efficient and reliable implementation of the MT service. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the first NTN network architecture provided in this application;

[0050] Figure 2 This is a schematic diagram of the second NTN network architecture provided in this application;

[0051] Figure 3 This is a schematic diagram of the architecture of a hybrid satellite network provided in this application;

[0052] Figure 4 This is a signaling interaction diagram of an access method for NTN according to the first embodiment of this application;

[0053] Figure 5 This is a signaling interaction diagram of an access method for NTN according to the second embodiment of this application;

[0054] Figure 6 This is a signaling interaction diagram of an access method for NTN according to the third embodiment of this application;

[0055] Figure 7 This is a signaling interaction diagram of an access method for NTN according to the fourth embodiment of this application;

[0056] Figure 8 This is a schematic diagram of the structure of an access device for NTN according to the fifth embodiment of this application;

[0057] Figure 9 This is a schematic diagram of the structure of an access device for NTN according to the sixth embodiment of this application;

[0058] Figure 10 This is a schematic diagram of the structure of an access device for NTN according to the seventh embodiment of this application;

[0059] Figure 11 This is a schematic diagram of the structure of an access device for NTN according to the eighth embodiment of this application. Detailed Implementation

[0060] The method provided in this application involves a network device and a UE, and the network device and the UE can transmit uplink and downlink signals.

[0061] The network devices in this embodiment include base stations and base station controllers of the access network, and may also include UEs (User Equipments). Specifically, the roles of network devices and UEs can be relative. For example, an unmanned aerial vehicle (UAV) terminal (also called a UAV device, or UAV UE) can be configured as a mobile network device. For UEs (e.g., mobile phones) accessing the wireless access network through a UAV UE, the UAV UE is a network device; however, for the base station, the UAV UE is a UE, meaning the base station and UAV UE communicate via a wireless air interface protocol. Of course, the base station and UAV UE can also communicate via an interface protocol between network devices. In this case, the UAV UE is also a network device relative to the base station. Therefore, both network devices and UEs can be collectively referred to as communication devices. A base station can be called a communication device with network device functions, and mobile phones, UAV UEs, etc., can be called communication devices with UE functions.

[0062] The base station (BS) in this application embodiment, also known as a base station device, is a device deployed in a Radio Access Network (RAN) to provide wireless communication functions. For example, in a 2G network, devices providing base station functions include a Base Transceiver Station (BTS); in a 3G network, devices providing base station functions include a Node B; in a 4G network, devices providing base station functions include an evolved Node B (eNB); in Wireless Local Area Networks (WLANs), devices providing base station functions are Access Points (APs); in 5G NR, devices providing base station functions include gNBs and further evolved Node Bs (ng-eNBs). The gNB and UE communicate using NR technology, while the ng-eNB and UE communicate using Evolved Universal Terrestrial Radio Access (E-UTRA) technology. Both the gNB and ng-eNB can connect to the 5G core network. The base station in this application embodiment also includes equipment that provides base station functions in future new communication systems.

[0063] The base station controller in this application embodiment can also be called a base station controller device, which is a device for managing base stations, such as the base station controller (BSC) in 2G networks, the radio network controller (RNC) in 3G networks, and can also refer to the device for controlling and managing base stations in future new communication systems.

[0064] The UE in this application embodiment can also be referred to as a terminal device, which can refer to various forms of access terminal, user unit, user station, mobile station, mobile station (MS), remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user equipment. The terminal device can also be a cellular phone, cordless phone, Session Initiation Protocol (SIP) phone, Wireless Local Loop (WLL) station, Personal Digital Assistant (PDA), handheld device with wireless communication function, computing device or other processing device connected to a wireless modem, vehicle-mounted device, wearable device, terminal device in future 5G networks, or terminal device in future evolved Public Land Mobile Network (PLMN), etc., and this application embodiment does not limit this.

[0065] The technical solution of this application can be applied to the fourth generation (4G) system, also known as the long term evolution (LTE) system; or it can be applied to the 5G system, also known as the NR system; or it can be applied to the sixth generation (6G) system, or the seventh generation (7G) system, or other future communication systems. The embodiments of this application are not limited in this respect.

[0066] The technical solution of this application is also applicable to different network architectures, including but not limited to relay network architecture, dual-link architecture, vehicle-to-everything (V2X) architecture, device-to-device (D2D) architecture, etc.

[0067] The non-terrestrial networks (NTNs) in this application refer to networks that utilize non-terrestrial communication infrastructure such as satellites and high-altitude platforms (e.g., drones, stratospheric balloons) to achieve global communication coverage. NTNs are an important supplement to terrestrial networks (TNs). NTNs can connect directly to the UE via satellite, with a gateway station set up on the ground to ultimately connect to the 5G core network. Satellites can act as base stations, directly transmitting 5G signals to connect with the UE, or they can act as transparent relay nodes, passing signals sent by ground stations to the UE. Figure 1 and Figure 2 These are two common NTN network architectures. Figure 1 In this architecture, the NTN base station (labeled as a base station in the diagram) is located on a satellite, while core network elements (such as Access and Mobility Management Function (AMF) and User Plane Function (UPF)) are located on the ground. The link between the UE and the satellite is called the service link, and the link between the satellite and the ground gateway is called the feeder link. Figure 2 In this model, the NTN base station (labeled as base station in the diagram) and related core network elements (such as AMF and UPF) are all located on the ground. The link between the UE and the satellite is still referred to as the serving link, and the link between the satellite and the ground gateway is still referred to as the feeder link. This application embodiment does not impose any limitations on the NTN network structure, meaning that this application embodiment can be used for any existing NTN network architecture, and even future NTN network architectures.

[0068] The NTN in this application embodiment may include a satellite network, and may also include a network composed of High Attitude Platform Stations (HAPS) and UAVs. For example, a HAPS network provides telecommunications services by placing wireless base stations on aircraft that remain at high altitudes for extended periods, such as airplanes, hot air balloons, and airships.

[0069] Furthermore, the future of satellite communications is moving towards hybrid satellite networks that combine services from Low Earth Orbit (LEO), Medium Earth Orbit (MEO), and Geostationary Transfer Orbit (GEO) satellites. Networks composed of LEO satellites are called LEO networks, networks composed of MEO satellites are called MEO networks, and networks composed of GEO satellites are called GEO networks. For example, see reference... Figure 3 Initially, the UE can access the cell managed by LEO_1 to provide services. As the satellite moves, the UE can reselect a cell to be reselected by LEO_2 to continue providing services. For example, continue to refer to... Figure 3 The UE can always access the cell managed by the GEO. Since the GEO and the ground remain relatively stationary, the UE does not need to perform cell reselection while accessing the GEO network.

[0070] In this application embodiment, GEO networks, MEO networks, LEO networks, HAPS networks, and UAV networks are distinguished into different types of non-terrestrial networks. These different types of non-terrestrial networks have unique characteristics: First, GEO is approximately 36,000 kilometers above Earth, MEO is 5,000 to 20,000 kilometers above Earth, LEO is 500 to 1,500 kilometers above Earth, and HAPS is at an altitude between LEO and UAV. These differences in the altitude of these satellites or aircraft result in different performance characteristics for various non-terrestrial networks. Second, according to the description of protocol version TS22.261, the end-to-end latency of LEO is 35 milliseconds, while the latency of MEO and GEO is 95 milliseconds and 285 milliseconds, respectively. Based on this, it can be inferred that GEO networks can provide continuous coverage over large areas with fewer satellites, while LEO networks can support services with lower latency requirements. Third, the motion characteristics of satellites at different altitudes are also different. GEO does not move relative to Earth, while LEO, at an altitude of 600 kilometers above Earth, moves at a speed of 7.5 kilometers per second.

[0071] Considering the limited power of the UE, it is necessary to conserve power to extend battery life. In some cases, the UE rarely receives (or must send) data packets. In these cases, it is wasteful for the UE to continuously maintain synchronization with non-Geostationary-Satellite Orbit (NGSO, including MEO and LEO). To solve the above technical problems, embodiments of this application provide an access method for non-terrestrial networks, allowing the UE in an idle state to camp in the GEO network, and then select a suitable non-terrestrial network for access based on service requirements when data needs to be transmitted. The UE can perform a cell reselection procedure to access cells of other non-terrestrial networks from the GEO network.

[0072] Multiple cells can exist on a single frequency point. In some embodiments, cells of different types of non-terrestrial networks are deployed on different frequency points. For example, cells on frequency point 1 are all cells of the GEO network, and cells on frequency point 2 are all cells of the MEO network. In some embodiments, cells of different types of non-terrestrial networks can be deployed on the same frequency. For example, there are both HAPS network cells and LEO network cells on the same frequency point.

[0073] In this embodiment, cell reselection priority is divided based on frequency point. Cells on the same frequency point have the same cell reselection priority, while cells on different frequencies may have the same or different reselection priorities. Therefore, cell reselection priority can be understood as frequency point priority. Cell reselection priorities for different NR frequencies or different systems may originate from system messages (e.g., System Information Block (SIB)) or dedicated signaling (e.g., Radio Resource Control (RRC) release messages) of the current serving cell, or from different systems during reselection. For example, system messages or dedicated signaling may carry a cell reselection priority parameter, which ranges from 0 to 7, with a higher value indicating a higher priority. The UE can determine the cell reselection priority for the corresponding frequency point based on the specific value configured for this parameter. If no reselection priority is configured in the SIB, no cell reselection measurement is performed. If a dedicated signaling parameter configures a cell reselection priority, the UE ignores all priorities from the SIB. For example, the dedicated signaling RRC Release message may carry cell reselection priorities. Before the dedicated priority validity timer T320 expires, UEs in the RRC idle (RRC_IDLE) state should use the cell reselection priorities configured in the dedicated signaling.

[0074] The cell reselection process in this application embodiment can refer to the 5G cell reselection mechanism, which specifically includes three stages: initiating neighbor cell measurement, reselection evaluation, and performing cell reselection.

[0075] 1. Start the neighbor cell measurement phase

[0076] For neighboring cells on the same frequency as the serving cell, if the signal quality of the serving cell satisfies Srxlev ≤ Srxlev threshold (SIntraSearchP) or Squal ≤ Squal threshold (SIntraSearchQ), the UE needs to measure the neighboring cells on the same frequency. Conversely, if Srxlev > SIntraSearchP and Squal > SIntraSearchQ, the UE does not perform cell-to-cell measurement. Here, Srxlev is the cell selection RX level value in dB; SIntraSearchP is the Reference Signal Received Power (RSRP) threshold for initiating cell-to-cell measurement; Squal is the cell selection quality value in dB; and SIntraSearchQ is the Reference Signal Receiving Quality (RSRQ) threshold for initiating cell-to-cell measurement.

[0077] For neighboring cells on different frequencies (neighboring cells not on the same frequency as the serving cell) or on different system frequencies, and if cell reselection priority is configured, the following rules apply:

[0078] 1) For high-priority frequency points, the UE always initiates measurement of them;

[0079] 2) For inter-frequency signals of the same or lower priority, and inter-system frequencies of lower priority: If the signal quality of the serving cell satisfies Srxlev ≤ Srxlev threshold (SnonIntraSearchP) for inter-frequency and radio access technology (RAT) measurements, or Squal ≤ Squal threshold (SnonIntraSearchQ) for inter-frequency and RAT measurements, then the UE initiates measurement for that frequency; otherwise, if Srxlev > SnonIntraSearchP and Squal > SnonIntraSearchQ, then measurement for that frequency is not initiated. Here, SnonIntraSearchP is the RSRP signal level threshold used to initiate inter-frequency measurement; SnonIntraSearchQ is the RSRQ signal quality threshold used to initiate inter-frequency measurement.

[0080] Among them, SIntraSearchP, SIntraSearchQ, SnonIntraSearchP, and SnonIntraSearchQ can be configured by the network device.

[0081] 2. Re-evaluation phase

[0082] After the UE initiates neighbor cell measurement, it can begin evaluating whether to reselect to a neighbor cell. The criteria for the UE to perform the reselection evaluation are also related to the cell's reselection priority. The criteria for reselection evaluation include:

[0083] For inter-frequency cell reselection, when the reselection priority of a neighboring cell is higher than that of the current serving cell, if the SIB message contains the serving cell's Squal threshold (denoted as "ThreshServing, LowQ" or "threshServingLowQ"), then if the UE camps in the current serving cell for more than 1 second (s) and the neighboring cell's signal quality Squal > the high-priority frequency Squal threshold (ThreshX, HighQ) is satisfied within the time interval T, the UE will reselect to the high-priority inter-frequency or inter-system frequency. Otherwise, if the SIB message does not contain "threshServingLowQ", then if the UE camps in the current serving cell for more than 1 second and the neighboring cell's signal quality Srxlev > the high-priority frequency Srxlev threshold (ThreshX, HighP), the UE will reselect to the highest-priority inter-frequency or inter-system frequency. The duration T can be a pre-configured measurement time TreselectionRAT.

[0084] For intra-frequency and same-priority inter-frequency cell reselection, when the reselection priority of a neighboring cell is equal to that of the serving cell, intra-frequency / same-priority inter-frequency cell reselection needs to be performed according to the cell reselection criterion (R criterion). The ranking criterion Rs of the serving cell and the ranking criterion Rn of the neighboring cell are defined by the following formulas:

[0085] Rs=Qmeas,s+Qhyst–Qoffsettemp

[0086] Rn=Qmeas,s–Qoffset–Qoffsettemp

[0087] Where Qmeas,s is the RSRP measured during cell reselection; Qhyst is the hysteresis of the serving cell during cell reselection; Qoffset is the quality offset of neighboring cells (i.e., neighboring cells) during cell reselection: for co-frequency cells, if Qoffsets,n is configured, it is Qoffsets,n; otherwise, it is 0; for inter-frequency cells, if Qoffset,n is configured, it is Qoffsets,n+Qoffsetfrequency; otherwise, it is Qoffsetfrequency, where n is the cell ID; and Qoffsettemp is the temporary additional offset.

[0088] The UE calculates the R value (also known as the cell signal quality level) of each cell based on the RSRP measurement values ​​of the serving cell and candidate neighboring cells (meeting the cell selection criteria, i.e., the S criterion), and determines the highest-ranked cell or the best cell according to the R value ranking rules. When the UE camps on the serving cell for more than 1 second and the highest-ranked cell or the best cell is superior to the serving cell within the time interval T (i.e., meets the cell reselection criteria), the UE will reselect to the new cell.

[0089] If the `rangeToBestCell` parameter is not configured, the UE should reselect the highest-ranked cell. If the `rangeToBestCell` parameter is configured, the UE should select the cell with the most beams above the threshold from the highest `rangeToBestCell` cells ranked according to criterion R. If there are multiple such cells (with the same number of beams above the threshold), the UE should reselect the highest-ranked cell. The threshold is `absThreshSS-BlockConsolidation`. If the `rangeToBestCell` parameter is configured but the `absThreshSS-BlockConsolidation` parameter is not configured, the UE assumes that each cell on that frequency point has one beam above the threshold.

[0090] For low-priority inter-frequency cell reselection (which means that the UE does not find a cell that meets the above conditions among high-priority cells and neighboring cells of the same priority), the reselection priority of the neighboring cell is lower than that of the serving cell at this time. If the SIB message contains ThreshServingLowQ and the UE has resided in the serving cell for more than 1 s, then when a low-priority neighboring cell (inter-frequency or inter-system cell) meets Squal > low-priority frequency Squal threshold (ThreshX, LowQ) within the time interval T, and the serving cell meets Squal < ThreshServingLowQ, the UE reselects to the low-priority inter-frequency or inter-system cell; if the SIB message does not contain ThreshServingLowQ and the UE has resided in the serving cell for more than 1 s, then when a low-priority neighboring cell meets Srxlev > low-priority frequency Srxlev threshold (ThreshX, LowP) within the time interval T, and the serving cell meets Srxlev < serving cell Srxlev threshold (ThreshServing, LowP), the UE reselects to the low-priority inter-frequency or inter-system cell.

[0091] Among them, the high-priority frequency Squal threshold (ThreshX, HighQ), the high-priority frequency Srxlev threshold (ThreshX, HighP), the low-priority frequency Squal threshold (ThreshX, LowQ), ThreshServingLowQ, the serving cell Srxlev threshold (ThreshServing, LowP), and the low-priority frequency Srxlev threshold (ThreshX, LowP) can be configured by network devices.

[0092] 3. Execute the cell reselection phase

[0093] After the UE performs cell measurements and determines the target neighboring cell that meets the conditions, it executes cell reselection to attempt to reside in the target neighboring cell. Before the UE determines to reside in the target neighboring cell, it needs to read the system message of the target neighboring cell and determine whether the target cell can be normally resided in (such as whether it is barred / reserved, etc.). If the target cell meets the residence conditions, the UE resides in the target cell and completes the cell reselection process.

[0094] Currently, the configuration of cell reselection priorities does not consider service requirements. All services are treated with the same priority rules for cell reselection. When a UE chooses to camp or reselect based on measurement results, the probability of selecting a particular type of NTN is the same for different services. However, as the aforementioned analysis shows, different types of NTNs have different characteristics in terms of latency and mobility. This uncertainty in access selection during current technology can easily lead to the UE actually accessing an NTN type that is unsuitable for the service to be transmitted, affecting service efficiency and communication quality.

[0095] In view of this, this application provides an access method for non-terrestrial networks, comprising: in response to a service being triggered, a UE sending a cell access request to a network device in a non-terrestrial network according to the service, wherein different services are associated with different types of non-terrestrial networks; and the network device in the non-terrestrial network communicating with the UE that has completed the cell access procedure to transmit the service.

[0096] By adopting the scheme of this application, based on the relationship between the type of non-terrestrial network and services, when a specific service is triggered, the UE can select the most suitable non-terrestrial network access to transmit mobile originated (MO) services and mobile terminated (MT) services. This is beneficial to improve the compatibility between services and non-terrestrial networks, so that services can be carried out smoothly, improve the reliability of service implementation, and improve communication quality.

[0097] The services in this application embodiment may include MO (Mobile Onboarding) services and MT (Mobile Downlink) services. MO services refer to messages initiated by the UE or uplink data to be transmitted by the UE, while MT services refer to messages received by the UE or downlink data to be received by the UE. Furthermore, either MO or MT services can be further classified into multiple services based on parameters, with different services associated with different types of NTNs. Services can be characterized based on at least one of the following parameters: Quality of Service (QoS), QoS flow ID (QFI), bearer identifier, and logical channel identifier. Furthermore, QoS may include a series of parameters such as service latency, data rate, reliability, and mobility requirements.

[0098] In some embodiments, services (MO services or MT services) can be further divided into multiple services according to different QoS levels, such as high QoS services, medium QoS services, and low QoS services. Furthermore, high QoS services, medium QoS services, and low QoS services are associated with different types of NTNs, respectively.

[0099] Furthermore, QoS can also include type (Guaranteed Stream Bit Rate GBR, Delay Critical Guaranteed Stream Bit Rate GBR, Non-Guaranteed Stream Bit Rate (non-GBR), Emergency), priority level, Packet Delay Budget (PDB), Packet Error Rate (PER), etc. Correspondingly, QoS of the Delay Critical Guaranteed Stream Bit Rate type and other QoS of the Non-Delay Critical Guaranteed Stream Bit Rate type can be associated with different types of NTNs. Similarly, QoS of different priority levels can be associated with different types of NTNs.

[0100] In some embodiments, services (MO services or MT services) can be further divided into multiple services according to different QFIs, and services of different QFIs are associated with different types of NTNs.

[0101] In some embodiments, services (MO services or MT services) can be further divided into multiple services according to different bearer identifiers, and services with different bearer identifiers are associated with different types of NTNs.

[0102] In some embodiments, services (MO services or MT services) can be further divided into multiple services according to different logical channel identifiers, and services with different logical channel identifiers are associated with different types of NTNs.

[0103] The dimensions that distinguish different types of non-terrestrial networks include at least altitude.

[0104] The association (or mapping) between services and NTN types can include the following: the lower the latency requirement and the higher the data rate requirement of the service, the lower the corresponding NTN height. In this embodiment, low latency requirement refers to a short allowable latency, and high latency requirement refers to a long allowable latency. For example, if a service has a low latency requirement (e.g., an allowable latency of 10 milliseconds), the service can be associated with an LEO network; conversely, if a service has a high latency requirement (e.g., an allowable latency of 50 milliseconds), the service can be associated with an MEO network.

[0105] In this embodiment of the application, the type of NTN associated with a service refers to the network type associated with the service.

[0106] In the embodiments of this application, "responding to a specific condition or event" can refer to either "when a specific condition or event occurs" or "if a specific condition or event occurs." For example, "responding to a service being triggered, the UE executing corresponding steps" can mean that if the UE actively initiates an MO service or receives scheduling from a network device to initiate an MT service, then the UE executes the corresponding steps.

[0107] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0108] Figure 4 This is a signaling interaction diagram of an access method for NTN according to the first embodiment of this application.

[0109] The embodiments of this application can be applied to a hybrid satellite network selection scenario initiated by the UE. Specifically, the hybrid satellite network may include multiple different types of NTNs, and the UE selects one NTN to access in order to initiate MO services, such as sending data or messages to the network equipment of the cell to which the accessed NTN belongs.

[0110] In specific implementation, in the access method provided by steps (S) 100 to S102 below, the actions performed by the UE can be performed by a chip with access function in the UE or by a baseband chip in the UE. The actions performed by the network device can be performed by a chip with access function in the network device or by a baseband chip in the network device.

[0111] Figure 4 This example demonstrates two NTN types (denoted as NTN1 and NTN2), where the UE camps on the cell of NTN1 during idle state, and NTN2 is the target type NTN. In practical applications, it can include only NTN1, or it can include NTN1, NTN2, NTN3, and NTN4, or even more types of NTNs. This implementation does not impose any limitation on the number of NTN types.

[0112] Specifically, refer to Figure 4 The access method for NTN described in this implementation scheme may include the following steps:

[0113] S102, in response to the service being triggered, the UE sends a cell access request to the network device (i.e., NTN2) in the non-terrestrial network according to the service.

[0114] More specifically, when a UE generates an uplink transmission request for data or messages, it can be determined that an MO service has been triggered.

[0115] Furthermore, when a UE determines that it is initiating an MO service, it can proactively execute S102 to send a cell access request to the NTN network equipment, requesting access to the NTN's cell. Moreover, the type of the NTN requested in the cell access request is the network type associated with the MO service triggered this time, i.e. Figure 4 NTN2 in the middle.

[0116] In some embodiments, before executing S102, the UE can be in an idle state and reside on NTN1, which can be, for example, a GEO network. This avoids the UE repeatedly performing meaningless synchronization in the idle state, reducing UE power consumption.

[0117] In one specific embodiment, S102 may specifically include the following steps:

[0118] S1021, the UE determines the target type of NTN (i.e., NTN2) based on the service.

[0119] For example, a UE can select the appropriate NTN type based on the QoS of the service. If the service has a high QoS, it corresponds to the LEO network; if the service has a medium QoS, it corresponds to the MEO network; and if the service has a low QoS, it corresponds to the GEO network.

[0120] Furthermore, S102 may also include the following steps:

[0121] S1023, the UE sends a cell access request to the network device of NTN2, and the network device of NTN2 receives the cell access request accordingly. The cell access request can be used to request access to the cell of NTN2 to initiate MO services.

[0122] For example, in S1023, the UE can execute a random access procedure to attempt to access the NTN2 cell. In response to the UE successfully accessing the NTN2 cell, the network equipment to which the cell belongs communicates with the UE to receive data or messages for MO services initiated by the UE, such as the UE sending data to the network equipment to which the NTN2 cell belongs.

[0123] Therefore, when a UE initiates an MO service, it can proactively select a more suitable non-terrestrial network for access based on the MO service to be transmitted, so as to ensure that the accessed non-terrestrial network meets the service requirements in terms of characteristics such as latency.

[0124] Figure 5 This is a signaling interaction diagram of an access method for NTN according to the second embodiment of this application.

[0125] The embodiments of this application can be applied to a hybrid satellite network selection scenario initiated by the UE. Specifically, the hybrid satellite network may include multiple different types of NTNs, and the UE selects one NTN to access in order to initiate MO services.

[0126] In specific implementation, in the access method provided in steps (S) 100 to 1024 below, the actions performed by the UE can be performed by a chip with access function in the UE or by a baseband chip in the UE. The actions performed by the network device can be performed by a chip with access function in the network device or by a baseband chip in the network device.

[0127] This section primarily focuses on the second embodiment and the above. Figure 4 The differences in the first embodiment shown will be explained. In this example, three NTNs (denoted as NTN1, NTN2, and NTN3) are used as examples for demonstration. During idle state, the UE camps on the cell of NTN1. NTN2 is the NTN with a higher probability of camping when the UE performs cell reselection based on service-related parameter configurations. NTN3 is the NTN to which the UE actually selects to access during the cell reselection process based on service-related parameter configurations. In practical applications, only NTN1 may be included, or NTN1, NTN2, NTN3, and NTN4, or even more types of NTNs, may be included. This implementation does not impose any limitation on the number of NTN types.

[0128] Specifically, refer to Figure 5 This embodiment is the same as the one described above. Figure 4 The main differences in the first embodiment shown include: Figure 4 Step S102 can be replaced by the following steps:

[0129] S1022, the UE determines the parameter configuration based on the service and uses the parameter configuration to perform cell reselection. The parameter configuration is used for cell reselection, and the probability of reselecting a cell based on the parameter configuration to camp on a non-terrestrial network associated with the service (e.g., NTN2) is higher than the probability of camping on other types of non-terrestrial networks.

[0130] S1024, the UE sends a cell access request to the network device (i.e., the network device of NTN3) to which the cell selected during the cell reselection procedure belongs, and the network device of NTN3 receives the cell access request accordingly. The cell access request is used to request access to the cell managed by the network device to transmit MO services.

[0131] Specifically, the frequency point parameter configuration can include at least one of Qoffset and cell reselection priority. For the same frequency point, different services correspond to different parameter configurations; that is, different types of NTNs can be associated with different parameter configurations. For any parameter configuration, when a UE performs cell reselection, the probability of reselecting to a cell of the NTN associated with that parameter configuration is higher than the probability of reselecting to a cell of another type of NTN. Therefore, by configuring different parameter configurations specifically for various types of NTNs, it is ensured that after the UE determines the corresponding parameter configuration based on the service, it has a higher probability of reselecting to a cell of the NTN associated with the service when performing cell reselection based on the determined parameter configuration.

[0132] For example, for services with high latency requirements, the cell reselection priority of the GEO network is higher than that of the MEO network and the LEO network; for services with low latency requirements, the cell reselection priority of the LEO network is higher than that of the MEO network and the GEO network.

[0133] Taking inter-frequency cell reselection as an example, assume that the current serving cell is a cell in the GEO network and the neighboring cell is a cell in the LEO network. The service triggered this time has low latency requirements, which means that the cell reselection priority of the LEO network cell is the highest, the cell reselection priority of the MEO network cell is the second, and the cell reselection priority of the GEO network cell is the lowest. Since the cell reselection priority of the neighboring cells (i.e., cells in the LEO network and the MEO network) is higher than that of the current serving cell (i.e., the cell in the GEO network), if the SIB message contains the serving cell Squal threshold, the UE stays in the current serving cell for more than 1 s, and when the signal quality of the neighboring cell Squal > the high-priority frequency Squal threshold (ThreshX, HighQ) within the time interval T, it reselects to a high-priority inter-frequency or inter-system (in this example, it is a cell in the MEO network); otherwise, that is, the SIB message does not contain threshServingLowQ, the UE stays in the current serving cell for more than 1 second and when the signal quality of the neighboring cell satisfies Srxlev > the high-priority frequency Srxlev threshold (ThreshX, HighP), it reselects to the highest-priority inter-frequency or inter-system frequency point (in this example, it is a cell in the LEO network).

[0134] For another example, for services with high latency requirements, the Qoffset of the GEO network is less than that of the MEO network and the LEO network; for services with low latency requirements, the Qoffset of the LEO network is greater than that of the MEO network and the GEO network. For another example, for services with a logical channel identifier of 1, the Qoffset of the GEO network < the Qoffset of the MEO network < the Qoffset of the UAV network < the Qoffset of the LEO network; for services with a logical channel identifier of 2, the Qoffset of the GEO network > the Qoffset of the MEO network > the Qoffset of the UAV network > the Qoffset of the LEO network.

[0135] Assuming that cells in the GEO, MEO, UAV, and LEO networks have equal reselection priorities, cell reselection is performed according to the cell reselection criterion (R criterion) for cells on the same frequency or with the same priority but different frequencies. The UE calculates the R value for each cell based on the RSRP measurements of the serving cell (i.e., the GEO network cell) and candidate neighboring cells (i.e., the MEO network cell, the UAV network cell, and the LEO network cell). Assuming the logical channel identifier of the triggered service is 2, the UE calculates the R value for each cell based on the configuration of Qoffset in the GEO network > Qoffset in the MEO network > Qoffset in the UAV network > Qoffset in the LEO network. The calculated R values ​​are sorted from high to low as MEO network cell > GEO network cell > UAV network cell > LEO network cell. Therefore, the cell with the highest ranking or the best cell is determined to be the MEO network cell. When a UE stays in the serving cell for more than 1 second and the highest-ranked or best cell satisfies the requirement of being superior to the serving cell within the time interval T (i.e., meeting the cell reselection criteria), the UE will reselect to a new cell, i.e., a cell in the MEO network.

[0136] This embodiment is the same as the above. Figure 4 The difference between the first embodiment and the previous one is that in the first embodiment, the UE can bypass the cell reselection procedure and directly access the selected target type NTN to initiate services or send data; while in this embodiment, the cell that the UE ultimately accesses is determined based on a combination of factors, including the current signal environment and the characteristics of various NTNs. Specifically, the UE still needs to perform a cell reselection procedure, using the parameter configurations used in this cell reselection procedure to improve the UE's access to the service-related NTN (similar to...). Figure 4 Given the probability of the target type NTN in the first embodiment shown, the UE may still reselect to an NTN with a lower correlation to the service (similar to...). Figure 4 The first embodiment shown is a cell of non-target type NTN.

[0137] For example, combining Figure 5 The UE determines the parameter configuration based on the service. Theoretically, based on the parameter configuration, the probability of cell reselection and camping on NTN2 is higher than the probability of camping on other types of NTN (e.g., NTN1 and NTN3). However, in the actual communication environment, the signal quality of NTN2 cells is generally poor at the UE's current location. Even if the UE uses the service-determined parameter configuration when performing cell reselection, NTN2 cells still do not meet the cell reselection rules. In this case, the UE preferably reselects or camps on an NTN3 cell that meets the cell reselection rules based on the cell reselection procedure to ensure better signal quality after accessing the network.

[0138] Therefore, this embodiment can more comprehensively consider the current signal environment of the UE, the characteristics of various NTNs, etc., to ensure the service quality and communication quality of the UE.

[0139] In the above Figure 4 The first embodiment shown and Figure 5 In a common embodiment of the second embodiment shown, the association between the service and the NTN type can be pre-configured. For example, the mapping rules between the service's QFI and the NTN type can be pre-configured, such as configuring the corresponding QFI value range for NTNs of different heights. As another example, the mapping rules between the service's QoS and the NTN type can be pre-configured.

[0140] In the above Figure 4 The first embodiment shown and Figure 5 In another common embodiment of the second embodiment shown, the association between the service and the NTN type can be dynamically indicated by the network device. Therefore, the network device can flexibly adjust the association between the service and the NTN type according to the actual communication environment, ensuring that the UE can preferentially access the cell with the most suitable NTN altitude whenever it initiates an MO service.

[0141] Specifically, refer to Figure 4 and Figure 5 The access method for NTN described in this embodiment may further include the following steps:

[0142] In S100, the NTN1 network device sends configuration information to the UE, and the UE receives the configuration information accordingly. The configuration information is used to configure the mapping relationship between services and non-terrestrial network types.

[0143] Taking NTN1 as an example of a GEO network, when a UE in idle state is camped on the GEO network, the network devices of the GEO network can send configuration information to the UE to configure the mapping relationship between services and non-terrestrial network types to the UE.

[0144] In some embodiments, the UE can initially obtain a set of mapping relationships between service and non-terrestrial network types based on a pre-configured method. If the NTN1 detects a change in network communication conditions while the UE is camped on the NTN1, the network device of the NTN1 will configure the updated mapping relationship between service and non-terrestrial network types to the UE through configuration information.

[0145] Changes in network communication conditions can include any of the following: changes in NTN characteristics (e.g., altitude); changes in service QoS, logical channel identifiers, etc.; or significant differences in real-time communication load between different types of NTNs.

[0146] For example, the pre-configured mapping between service and non-terrestrial network types is as follows: services with a QoS latency requirement of less than 20 milliseconds correspond to the LEO network, services with a latency requirement of less than 50 milliseconds correspond to the MEO network, and services with a latency requirement of less than 100 milliseconds correspond to the GEO network. If the network device determines that the current communication load on the LEO network is high, while the communication load on the GEO network is very low, it can update the mapping between service and non-terrestrial network types based on the configuration information: services with a QoS latency requirement of less than 10 milliseconds correspond to the LEO network, services with a latency requirement of less than 50 milliseconds correspond to the MEO network, and services with a latency requirement of less than 80 milliseconds correspond to the GEO network. This may guide more UEs to choose to access cells in the GEO network to share the communication load of the LEO network.

[0147] Figure 6 This is a signaling interaction diagram of an access method for NTN according to the third embodiment of this application.

[0148] The embodiments of this application can be applied to a hybrid satellite network selection scenario initiated by a network device. Specifically, the hybrid satellite network may include multiple different types of NTNs, and the network device selects one NTN to schedule UE access to initiate MT services to the UE.

[0149] In specific implementation, in the access method provided in steps (S) 300 to S304 below, the actions performed by the UE can be performed by a chip with access function in the UE or by a baseband chip in the UE. The actions performed by the network device can be performed by a chip with access function in the network device or by a baseband chip in the network device.

[0150] Figure 6 This example demonstrates two types of NTNs (denoted as NTN1 and NTN2). During idle states, the UE camps on a cell of NTN1 (e.g., a GEO network), while NTN2 is an NTN associated with MT services. In practice, it may include only NTN1, or it may include NTN1, NTN2, NTN3, NTN4, or even more types of NTNs. This implementation does not impose any limitation on the number of NTN types.

[0151] Specifically, refer to Figure 6 The access method described in this embodiment may include the following steps:

[0152] In S300, the network device NTN1 sends indication information to the UE, and the UE receives the indication information accordingly. The indication information is used to indicate the NTN (i.e., NTN2) associated with the service.

[0153] More specifically, the indication information can directly indicate the type of NTN, such as GEO network, MEO network, LEO network, HAPS network, or UAV network. For example, a unique index or ID can be pre-assigned to each type of NTN, and the indication information indicates or carries the index or ID of the NTN associated with the triggered MT service. The network equipment of NTN1 generates corresponding indication information based on the triggered MT service to schedule the UE's access operation on the corresponding type of NTN.

[0154] Furthermore, the indication information can be carried in any of the following messages: Paging Early Indication (PEI), Paging Downlink Control Information (Paging DCI), and paging messages.

[0155] In some embodiments, the UE can listen to a DCI of type 1-0 scrambled with Paging Radio Network Temporary Identity (P-RNTI) (denoted as DCI 1-0) to receive paging messages from the network. The DCI 1-0 scrambled with P-RNTI is the paging DCI. In this embodiment, the DCI 1-0 scrambled with P-RNTI can carry indication information to indicate the type of NTN associated with the MT service.

[0156] In some embodiments, a PEI timing (PEIOcassion, or PEI-O for short) can be inserted before the paging timing. After the UE demodulates the PEI information, it then determines whether it needs to demodulate the PO information, thereby further reducing the power consumption of the UE listening to the paging.

[0157] Specifically, the UE obtains the subgroup ID information by demodulating DCI 2-7 in the PEI-O time slot. If the UE belongs to the subgroup indicated by the PEI, it listens to the Physical Downlink Control Channel (PDCCH) and the corresponding paging message during paging. If the UE does not belong to the subgroup indicated by the PEI, it does not need to listen to the PDCCH in the PO. Thus, through PEI, the UE reduces the demodulation of the PO, thereby reducing power consumption. Furthermore, in this embodiment, the PEI message carries indication information to indicate the type of NTN associated with the MT service. Therefore, the UE knows the type of NTN to be accessed at the same time as determining that the PO needs to be demodulated, which is beneficial for the UE to start preparing for the corresponding cell access procedure or cell reselection procedure as early as possible.

[0158] Therefore, the network device of NTN1 can instruct the UE to access the appropriate NTN to carry out MT services through paging. Specifically, paging refers to the process by which the network (specifically the access network or core network) locates or wakes up the UE. When a network device (e.g., the network device of NTN1) has downlink data to send to the UE, if the UE is in RRC idle state, the network device needs to locate the UE first and notify the UE to access the network. In this embodiment, the network device of NTN1 completes the indication of the target type of NTN while paging the UE, so that the UE can correctly access the NTN suitable for the MT service triggered this time.

[0159] Further reference Figure 6 The access method for NTN described in this embodiment may further include the following steps:

[0160] S302, the UE sends a cell access request to the network device of NTN2, and the network device of NTN2 receives the cell access request accordingly.

[0161] S304, in response to the UE successfully accessing the NTN2 cell, the network equipment to which the NTN2 cell belongs sends MT service data to the UE, and the UE receives the MT service data accordingly.

[0162] In some embodiments, the data for MT services can be data from the core network. For example, downlink data received via the UPF. In this case, the core network triggers a paging request to the UE. After receiving the paging request from the core network, the network device of NTN1 broadcasts a paging message within its coverage area. The paging message carries indication information. Assuming the indication information indicates the ID of NTN2, after the UE receives the paging message in S300, it executes S302 to request access to the core network through the network device of NTN2. After receiving the UE's access request, the core network learns that the UE has successfully accessed the core network from NTN2, and then requests the UPF to send downlink data to NTN2. The network device of NTN2 then executes S304 for subsequent data transmission.

[0163] In some embodiments, the UE can directly access the cell of the NTN indicated by the indication information, similar to the above. Figure 4 The first embodiment shown illustrates the implementation of S102. Alternatively, the UE can determine the corresponding parameter configuration based on the NTN indicated by the indication information, then execute the cell reselection procedure and camp on the selected cell, similar to the above. Figure 5 The second embodiment shown illustrates the implementation of S1022 and S1024.

[0164] Therefore, the UE camps on the GEO network in the idle state to avoid repeated synchronization. When there is an MT service that the UE needs to receive on the network side, the UE is triggered to access the NTN suitable for this MT service. This can reduce the UE power consumption and ensure the efficient and reliable implementation of the MT service.

[0165] In the above Figure 6 In a variation of the third embodiment shown, the indication information can be used to indicate a service. Further, the UE indicates the service via pre-configuration or network device (see reference). Figure 4 and Figure 5 The UE obtains the mapping relationship between the service and the NTN type in S100 of the illustrated embodiment, and then determines the target type NTN based on the service indicated by the indication information. Then, the UE can perform... Figure 4 In S102, the UE accesses a cell of the target type NTN. After the UE accesses a cell of the target type NTN, the network equipment to which the cell belongs initiates MT service.

[0166] In the above Figure 6 In another variation of the third embodiment shown, the indication information can be used to indicate a service. Furthermore, the UE can perform... Figure 5 In S1022 and S1024, the corresponding parameter configuration is determined according to the service indicated by the indication information, the determined parameter configuration is used to perform cell reselection and access the selected cell, and the network device to which the cell belongs initiates MT service to the UE.

[0167] Figure 7 This is a signaling interaction diagram of an access method for NTN according to the fourth embodiment of this application.

[0168] The embodiments of this application can be applied to a hybrid satellite network selection scenario initiated by a network device. Specifically, the hybrid satellite network may include multiple different types of NTNs, and the network device selects one NTN to instruct the UE to access and initiate MT services.

[0169] In specific implementation, in the access method provided in steps (S) 400 to 404 below, the actions performed by the UE can be performed by a chip with access function in the UE or by a baseband chip in the UE. The actions performed by the network device can be performed by a chip with access function in the network device or by a baseband chip in the network device.

[0170] This section primarily focuses on the fourth embodiment and the above. Figure 6The differences in the third embodiment shown will be explained. In this example, two NTNs (denoted as NTN1 and NTN2) are used as examples for demonstration, wherein the UE camps on the cell of NTN1 (e.g., a GEO network) during idle state, and NTN2 is an NTN associated with MT services. In practical applications, only NTN1 may be included, or NTN1, NTN2, NTN3, and NTN4 or even more types of NTNs may be included. This embodiment does not impose any limitation on the number of NTN types.

[0171] Specifically, refer to Figure 7 This embodiment is the same as the one described above. Figure 6 The main difference in the third embodiment shown is that the network device of NTN1 schedules the UE to perform access operations on the NTN associated with the MT service triggered this time in a different way. Specifically, Figure 6 The steps in the S300 standard can be replaced with the following steps:

[0172] In S400, the network device NTN1 sends a paging message to the UE, and the UE receives the paging message accordingly. The paging timing in the paging message is used to indicate the NTN associated with the service.

[0173] In one possible implementation, the UE uses Discontinuous Reception (DRX) to receive paging messages to reduce UE power consumption in RRC idle state. A DRX cycle contains one or more paging frames (PF), and each paging frame corresponds to one or more paging occasions (PO). Here, the DRX cycle represents the period during which the UE detects paging, the paging frame represents the system frame used to detect paging, and the paging occasion represents the specific PDCCH monitoring occasion for detecting paging.

[0174] In this embodiment, the NTN type is distinguished by the paging timing configuration. The UE receives a paging message at different paging times, determining that it needs to access the corresponding type of NTN so that the network side can initiate MT services. Compared to the above... Figure 6 In the third embodiment shown, additional indication information is carried in the paging message, PEI and other information to indicate the type of NTN. This embodiment helps to further reduce signaling overhead by distinguishing the NTN type through paging timing configuration.

[0175] In some embodiments, the resources associated with paging opportunities differ, corresponding to different types of NTNs. Specifically, multiple sets of paging opportunity resources can be pre-configured, each corresponding to a different type of NTN. For example, five sets of paging opportunity resources can be configured (denoted as paging resource 1, paging resource 2, paging resource 3, paging resource 4, and paging resource 5), where paging resource 1 corresponds to the GEO network, paging resource 2 corresponds to the MEO network, paging resource 3 corresponds to the LEO network, paging resource 4 corresponds to the HAPS network, and paging resource 5 corresponds to the UAV network. In S400, the UE wakes up only once within a DRX cycle to monitor one paging opportunity, and the UE monitors one paging opportunity per DRX cycle. Based on the resources associated with the paging opportunity that actually receives the paging message, the UE can determine the NTN associated with the MT service scheduled by the paging message. Therefore, the changes to the existing paging-related provisions in the protocol are relatively minor, and it can better support UEs with different protocol versions.

[0176] In some embodiments, a single paging cycle includes multiple paging opportunities, and different paging opportunities correspond to different types of NTNs. For example, assuming PO1 corresponds to NTN1 and PO2 corresponds to NTN2, in S400, NTN1 sends a paging message at PO2, the UE receives the paging message at PO2, and then determines that NTN2 corresponding to PO2 is the NTN associated with the MT service triggered this time.

[0177] Compared to existing technologies where the UE listens for only one paging opportunity within a single paging cycle, this embodiment allows the UE to listen for multiple paging opportunities within a single paging cycle. The target type of the NTN to be accessed is determined based on the actual paging opportunity when the paging message is received. Therefore, using the paging opportunity itself, rather than the resources associated with it, to distinguish NTN types helps reduce network-side resource overhead.

[0178] For example, the UE can calculate the paging frame (PF) to be listened to based on the UE identifier (UE_ID) and formula (1), and calculate one of the multiple paging opportunities (i_s) based on the UE_ID and formula (2):

[0179] (SFN + PF_offset) mod T = (T div N)*(UE_ID mod N) (1)

[0180] i_s = floor (UE_ID / N) mod Ns (2)

[0181] Where SFN represents the system frame number; T represents the paging period, which includes a cell-level indicator Tc in the system message and a UE-level indicator Tue in the RRC. If there is no Tue indicator, then T = Tc; if there is a Tue indicator, then T = min(Tc, Tue), where min represents the minimum value function. N represents the total number of paging frames in T. Ns represents the number of paging opportunities corresponding to one paging frame. PF_offset represents the offset of the paging frame. UE_ID = 5G-S-TMSI mod 1024, where TMSI is the UE's Temporary Mobile Subscriber Identifier, used to uniquely distinguish different UEs, and is also used in random access Msg3. When the UE does not have a TMSI, the default UE_ID = 0. mod represents modulo operation, div represents integer division operation, * represents multiplication operation, / represents division operation, and floor represents floor rounding up.

[0182] Then, the UE calculates other paging opportunities among multiple paging opportunities based on different pre-configured offset values.

[0183] Network devices can pre-configure the NTN type corresponding to the paging timing calculated based on UE_ID and formula (2), as well as the NTN type corresponding to each offset value. For example, a network device with NTN1 can configure the first paging timing (denoted as PO1) calculated based on UE_ID to correspond to NTN1, offset value 1 to correspond to NTN2, and offset value 2 to correspond to NTN3 through RRC release message, System Information Block (SIB) or Non-Access Stratum (NAS) signaling. The UE calculates PO1 to correspond to NTN1 based on UE_ID and formula (2), adds offset value 1 to PO1 to determine the second paging timing (denoted as PO2) to correspond to NTN2, and adds offset value 2 to PO1 to determine the third paging timing (denoted as PO3) to correspond to NTN3. The UE determines the paging frame based on the UE_ID and formula (1), and wakes up in the determined paging frame to listen to PO1 to PO3. Assuming that the UE listens to the paging message in PO2, the UE can determine that the NTN associated with the MT service triggered by this paging is NTN2.

[0184] Therefore, the UE determines multiple paging opportunities within a single paging cycle using the UE_ID, each corresponding to a different type of NTN.

[0185] In one variation, the network device can pre-configure an offset value representing the interval (e.g., time-domain interval) between adjacent paging times among multiple paging opportunities included in a single paging cycle. The network device can also pre-configure the time-domain ordering of multiple paging opportunities and the association between various types of NTNs. For example, the network device of NTN1 configures an offset value of 5 Orthogonal Frequency Division Multiplexing (OFDM) symbols through a message such as RRC release, and configures a single paging cycle to include 5 paging opportunities, corresponding to the GEO network, MEO network, LEO network, HAPS network, and UAV network in the time domain. The UE calculates the position of the first PO based on the UE_ID and formula (2) and determines the corresponding GEO network. Starting from the first PO, it offsets 5 OFDM symbols in the time domain to determine the position of the second PO and determines the corresponding MEO network. Starting from the second PO, it offsets 5 OFDM symbols in the time domain to determine the position of the third PO and determines the corresponding LEO network, and so on, until the position of the fifth PO and the corresponding UAV network are determined. As a result, the amount of configuration required on the network side is further reduced, which helps to reduce signaling overhead.

[0186] Apart from the steps that differ from the third embodiment, the explanations of the terms involved in S402 to S404 in the fourth embodiment and their specific implementation methods can be found in [reference needed]. Figure 6 The relevant descriptions of S302 to S304 in the third embodiment shown will not be repeated here.

[0187] In the above Figure 7 In a variation of the fourth embodiment shown, the paging message can be used to indicate a service. Accordingly, different paging times associated with different resources correspond to different services. Alternatively, different paging times correspond to different services.

[0188] Furthermore, the UE can obtain this information through pre-configuration or network device instructions (see reference). Figure 4 and Figure 5 The UE obtains the mapping relationship between the service and the NTN type in the manner described in S100 of the illustrated embodiment, and then determines the target type NTN based on the service indicated by the paging timing of the paging message. Then, the UE can perform... Figure 4 In S102, after the UE accesses a cell of the target type NTN, the network equipment to which the cell belongs can initiate MT service.

[0189] In the above Figure 7In another variation of the fourth embodiment shown, the paging message can be used to indicate a service. Accordingly, different paging times associated with different resources correspond to different services. Alternatively, different paging times correspond to different services.

[0190] Furthermore, the UE can execute Figure 5 In steps S1022 and S1024, the corresponding parameter configuration is determined based on the service indicated in the paging message. The determined parameter configuration is then used to perform cell reselection and access the selected cell. After the UE accesses the selected cell, the network equipment to which the cell belongs can initiate MT services.

[0191] In the above Figures 4 to 7 In a common variation of the illustrated embodiment, the target type NTN associated with the service (MO service or MT service) triggered this time is NTN1, that is, the NTN where the UE is camped in the idle state. Then the UE can directly initiate the cell access procedure on the currently camped NTN to switch to the RRC connection state.

[0192] Figure 8 This is a schematic diagram of an access device (denoted as access device 5) for an NTN according to the fifth embodiment of this application. Those skilled in the art will understand that the access device 5 described in this embodiment can be used to implement the above-described... Figures 1 to 7 The method described in the embodiments is as follows. Access device 5 can be the UE mentioned above.

[0193] Specifically, refer to Figure 8 The access device 5 described in this embodiment may include: a sending module 51, which, in response to a service being triggered, sends a cell access request to a network device in a non-terrestrial network according to the service; wherein different services are associated with different types of non-terrestrial networks.

[0194] In a non-limiting embodiment, the sending module 51 may be used to send a cell access request to a network device of a non-terrestrial network associated with the service, wherein the type of the non-terrestrial network associated with the service is the network type associated with the service.

[0195] In a non-limiting embodiment, the sending module 51 may be used to perform the following steps: determine parameter configuration based on the service, wherein the probability of cell reselection based on the parameter configuration is higher than the probability of cell reselection to a non-terrestrial network associated with the service, and the parameter configuration is used for cell reselection; perform cell reselection using the parameter configuration and send a cell access request to the network device to which the selected cell belongs.

[0196] Furthermore, different services require different parameter configurations.

[0197] Furthermore, the parameter configuration includes: the quality offset of adjacent cells and / or the cell reselection priority during cell reselection.

[0198] In a non-limiting embodiment, the mapping between service and non-terrestrial network types is pre-configured and / or network-indicated.

[0199] In a non-limiting embodiment, the access device 5 can also be used to receive configuration information for configuring the mapping relationship between service and non-terrestrial network types.

[0200] In a non-limiting embodiment, the access device 5 may also be used to receive indication information, which indicates the service, or the indication information indicates a non-terrestrial network associated with the service.

[0201] Furthermore, the indication information is carried in any of the following messages: paging early indication message, downlink control signaling for paging, and paging message.

[0202] In a non-limiting embodiment, the access device 5 may also be used to receive a paging message, the paging timing of which is used to indicate the service or a non-terrestrial network associated with the service.

[0203] In a non-limiting embodiment, the paging timing is associated with different resources, corresponding to different services or different types of non-terrestrial networks.

[0204] In a non-limiting embodiment, a single paging cycle includes multiple paging opportunities, with different paging opportunities corresponding to different services or different types of non-terrestrial networks.

[0205] In one non-limiting embodiment, the dimension that distinguishes different types of non-terrestrial networks includes at least height.

[0206] In a non-limiting embodiment, the service is characterized based on at least one of the following parameters: quality of service, quality of service flow identifier, bearer identifier, and logical channel identifier.

[0207] In a non-limiting embodiment, the UE resides on the GEO network before the service is triggered.

[0208] In a non-limiting embodiment, the UE is in an idle state before the service is triggered.

[0209] In a non-limiting embodiment, the services include MO services and MT services.

[0210] For more information on the working principle and operation mode of the access device 5, please refer to the above. Figures 1 to 7 The relevant descriptions in the text will not be repeated here.

[0211] In specific implementation, the aforementioned access device 5 may correspond to a chip with access function in the UE, or to a chip with data processing function, such as a system-on-a-chip (SOC), baseband chip, etc.; or to a chip module in the UE that includes a chip with access function; or to a chip module with a chip with access function; or to the UE.

[0212] Figure 9 This is a schematic diagram of an access device (denoted as access device 6) for an NTN according to the sixth embodiment of this application. Those skilled in the art will understand that the access device 6 described in this embodiment can be used to implement the above-described... Figures 1 to 7 The method described in the embodiments is as follows. The access device 6 can be the network device mentioned above, specifically the network device of the NTN where the UE is stationed in the idle state, such as the network device of the GEO network.

[0213] Specifically, refer to Figure 9 The access device 6 described in this embodiment may include: a sending module 61, used to send indication information, the indication information being used to indicate a service, or the indication information being used to indicate a non-terrestrial network associated with the service; wherein different services are associated with different types of non-terrestrial networks.

[0214] In a non-limiting embodiment, the type of the non-terrestrial network associated with the service is the network type associated with the service.

[0215] In a non-limiting embodiment, the indication information includes the service or a non-terrestrial network associated with the service.

[0216] In a non-limiting embodiment, the sending module 61 may be used to send a paging message, the paging timing of which is used to indicate the service or a non-terrestrial network associated with the service.

[0217] In a non-limiting embodiment, the paging timing is associated with different resources, corresponding to different services or different types of non-terrestrial networks.

[0218] In a non-limiting embodiment, a single paging cycle includes multiple paging opportunities, with different paging opportunities corresponding to different services or different types of non-terrestrial networks.

[0219] In a non-limiting embodiment, the access device 6 can also be used to send configuration information for configuring the mapping relationship between service and non-terrestrial network types.

[0220] In one non-limiting embodiment, the dimension that distinguishes different types of non-terrestrial networks includes at least height.

[0221] In a non-limiting embodiment, the service is characterized based on at least one of the following parameters: quality of service, quality of service flow identifier, bearer identifier, and logical channel identifier.

[0222] In a non-limiting embodiment, the services include MO services and MT services.

[0223] For more information on the working principle and operation mode of the access device 6, please refer to the above. Figures 1 to 7 The relevant descriptions in the text will not be repeated here.

[0224] In specific implementation, the aforementioned access device 6 may correspond to a chip with access function in a network device, or to a chip with data processing function, such as a system-on-a-chip (SOC), a baseband chip, etc.; or to a chip module in a network device that includes a chip with access function; or to a chip module with a chip with access function; or to a network device.

[0225] Figure 10 This is a schematic diagram of an access device (denoted as access device 7) for an NTN according to the seventh embodiment of this application. Those skilled in the art will understand that the access device 7 described in this embodiment can be used to implement the above-described... Figures 1 to 7 The method described in the embodiments is as follows. The access device 7 can be the network device mentioned above, specifically the NTN network device associated with the service triggered this time, i.e., the target type NTN network device.

[0226] Specifically, refer to Figure 10 The access device 7 described in this embodiment may include: a receiving module 71, used to receive a cell access request, wherein the cell access request is used to request access to a cell in a non-terrestrial network; wherein different services are associated with different types of non-terrestrial networks.

[0227] In one non-limiting embodiment, the dimension that distinguishes different types of non-terrestrial networks includes at least height.

[0228] In a non-limiting embodiment, the service is characterized based on at least one of the following parameters: quality of service, quality of service flow identifier, bearer identifier, and logical channel identifier.

[0229] In a non-limiting embodiment, the services include MO services and MT services.

[0230] For more information on the working principle and operation mode of the access device 7, please refer to the above. Figures 1 to 7The relevant descriptions in the text will not be repeated here.

[0231] In specific implementations, the aforementioned access device 7 may correspond to a chip with access function in a network device, or to a chip with data processing function, such as a system-on-a-chip (SOC), a baseband chip, etc.; or to a chip module in a network device that includes a chip with access function; or to a chip module with a chip with access function; or to a network device.

[0232] In specific implementation, the modules / units included in the various devices and products described in the above embodiments can be software modules / units, hardware modules / units, or a combination of both.

[0233] For example, for various devices and products applied to or integrated into a chip, each module / unit can be implemented using hardware methods such as circuits, or at least some modules / units can be implemented using software programs that run on a processor integrated within the chip, while the remaining (if any) modules / units can be implemented using hardware methods such as circuits; for various devices and products applied to or integrated into a chip module, each module / unit can be implemented using hardware methods such as circuits, and different modules / units can be located in the same component (e.g., chip, circuit module, etc.) or different components of the chip module, or at least some modules / units can be implemented using hardware methods such as circuits. The components can be implemented using software programs that run on the processor integrated within the chip module. The remaining (if any) modules / units can be implemented using hardware methods such as circuits. For various devices and products applied to or integrated into the terminal, each of its components / units can be implemented using hardware methods such as circuits. Different modules / units can be located in the same component (e.g., chip, circuit module, etc.) or in different components within the terminal. Alternatively, at least some modules / units can be implemented using software programs that run on the processor integrated within the terminal, while the remaining (if any) modules / units can be implemented using hardware methods such as circuits.

[0234] This application embodiment also provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transient storage medium, on which a computer program is stored. When the computer program is executed by a processor, the above-mentioned... Figures 1 to 7 The steps of the access method for NTN provided in the illustrated embodiment are performed.

[0235] In the embodiments of this application, the storage medium may include non-volatile memory or non-transitory memory, and may also include optical disks, hard disk drives, solid-state drives, etc.

[0236] This application also provides a computer program product, including a computer program / instructions, which, when executed by a processor, implements the above-described functionality. Figures 1 to 7 The steps of the access method for NTN described in the illustrated embodiment.

[0237] Figure 11 This is a schematic diagram of the structure of an access device for NTN according to the eighth embodiment of this application.

[0238] Specifically, refer to Figure 11 The access device for NTN may include a processor 81, coupled to a memory 82, which may be located within or outside the device. Optionally, a transceiver 83 may also be included. The memory 82, processor 81, and transceiver 83 can be connected via a communication bus. The memory 82 stores a computer program that can run on the processor 81, and the processor 81 executes the above-described... Figures 1 to 7 In the NTN access method provided in the illustrated embodiment, the transceiver 83 can perform the sending and / or receiving actions described above under the control of the processor 81. The NTN access device can be a network device as described above, or it can be a UE.

[0239] In this embodiment of the application, the memory 82 includes non-volatile memory or non-transitory memory, and may also include optical disk, hard disk, solid-state drive, etc.

[0240] In this embodiment, the processor 81 can be a central processing unit (CPU), but it can also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.

[0241] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by a program instructing related hardware. The program can be stored in a computer-readable storage medium, which may include ROM, RAM, disk, or optical disk, etc.

[0242] The embodiments described in this application are described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (devices), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0243] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0244] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0245] It should also be noted that in the embodiments of this application, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent the existence of A alone, the simultaneous existence of A and B, or the existence of B alone. A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, and c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c can be single or multiple.

[0246] In this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0247] This application can be described in the general context of computer-executable instructions, such as program modules, that are executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc., that perform a specific task or implement a specific abstract data type. This application can also be practiced in distributed computing environments where tasks are performed by remote processing devices connected via a communication network. In distributed computing environments, program modules can reside in local and remote computer storage media, including storage devices.

[0248] The various embodiments in this application are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the device embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0249] Those skilled in the art will recognize that the units and algorithm steps described in the embodiments of this application can be implemented using electronic hardware, computer software, or a combination of electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0250] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the devices, apparatuses, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0251] While this application discloses the above information, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of this application; therefore, the scope of protection of this application shall be determined by the scope defined in the claims.

Claims

1. An access method for non-terrestrial networks, characterized in that, include: In response to a service being triggered, a cell access request is sent to network devices in the non-terrestrial network according to the service. Different services are associated with different types of non-terrestrial networks.

2. The access method according to claim 1, characterized in that, Sending a cell access request to network devices in a non-terrestrial network according to the service includes: A cell access request is sent to a network device in a non-terrestrial network associated with the service, wherein the type of the non-terrestrial network associated with the service is the network type associated with the service.

3. The access method according to claim 1, characterized in that, Sending a cell access request to network devices in a non-terrestrial network according to the service includes: The parameter configuration is determined based on the service. Based on the parameter configuration, the probability of cell reselection and camping on a non-terrestrial network associated with the service is higher than the probability of camping on other types of non-terrestrial networks. The parameter configuration is used for cell reselection. Use the parameters to configure and perform cell reselection, and send a cell access request to the network device to which the selected cell belongs.

4. The access method according to claim 3, characterized in that, Different services require different parameter configurations; and / or, The parameter configuration includes: the quality offset of adjacent cells and / or the cell reselection priority during cell reselection.

5. The access method according to any one of claims 1 to 4, characterized in that, The mapping between service and non-terrestrial network types is pre-configured and / or network-indicated.

6. The access method according to any one of claims 1 to 5, characterized in that, Also includes: Receive indication information, which is used to indicate the service, or the indication information is used to indicate a non-terrestrial network associated with the service.

7. The access method according to claim 6, characterized in that, The indication information is carried in any of the following messages: paging early indication message, downlink control signaling for paging, and paging message.

8. The access method according to any one of claims 1 to 5, characterized in that, Also includes: Receive a paging message, the paging timing of which is used to indicate the service or a non-terrestrial network associated with the service.

9. The access method according to claim 8, characterized in that, The paging timing is associated with different resources, corresponding to different services or different types of non-terrestrial networks.

10. The access method according to claim 8, characterized in that, A single paging cycle includes multiple paging opportunities, and different paging opportunities correspond to different services or different types of non-terrestrial networks.

11. The access method according to any one of claims 1 to 10, characterized in that, The dimensions that distinguish different types of non-terrestrial networks include at least altitude.

12. The access method according to any one of claims 1 to 11, characterized in that, The service is characterized based on at least one of the following parameters: quality of service, quality of service flow identifier, bearer identifier, and logical channel identifier.

13. The access method according to any one of claims 1 to 12, characterized in that, Before the service is triggered, the user equipment (UE) is camped on a geostationary satellite network; and / or, before the service is triggered, the UE is in an idle state.

14. The access method according to any one of claims 1 to 13, characterized in that, The services include terminal initiating MO services and terminal terminating MT services.

15. An access method for a non-terrestrial network, characterized in that, include: Send indication information, the indication information being used to indicate a service, or the indication information being used to indicate a non-terrestrial network associated with the service; Different services are associated with different types of non-terrestrial networks.

16. The access method according to claim 15, characterized in that, The type of non-terrestrial network associated with the service is the network type associated with the service.

17. The access method according to claim 15 or 16, characterized in that, The indication information includes the service or a non-terrestrial network associated with the service.

18. The access method according to claim 15 or 16, characterized in that, The sending instruction information includes: Send a paging message, the paging timing of which is used to indicate the service or a non-terrestrial network associated with the service.

19. The access method according to claim 18, characterized in that, The paging timings are associated with different resources, corresponding to different services or different types of non-terrestrial networks; and / or, a single paging cycle includes multiple paging timings, with different paging timings corresponding to different services or different types of non-terrestrial networks.

20. The access method according to any one of claims 15 to 19, characterized in that, Also includes: Send configuration information, which is used to configure the mapping relationship between service and non-terrestrial network types.

21. The access method according to any one of claims 15 to 20, characterized in that, The dimensions that distinguish different types of non-terrestrial networks include at least altitude; and / or, the service is characterized based on at least one of the following parameters: quality of service, quality of service flow identifier, bearer identifier, logical channel identifier; and / or, the service includes terminal-initiated MO service and terminal-terminated MT service.

22. An access method for a non-terrestrial network, characterized in that, include: Receive a cell access request, the cell access request being used to request access to a cell in a non-terrestrial network; Different services are associated with different types of non-terrestrial networks.

23. The access method according to claim 22, characterized in that, The dimensions that distinguish different types of non-terrestrial networks include at least altitude; and / or, the service is characterized based on at least one of the following parameters: quality of service, quality of service flow identifier, bearer identifier, logical channel identifier; and / or, the service includes terminal-initiated MO service and terminal-terminated MT service.

24. An access device for a non-terrestrial network, characterized in that, include: The sending module, in response to a service being triggered, is used to send a cell access request to network devices in a non-terrestrial network according to the service. Different services are associated with different types of non-terrestrial networks.

25. An access device for a non-terrestrial network, characterized in that, include: A sending module is configured to send indication information, the indication information being used to indicate a service, or the indication information being used to indicate a non-terrestrial network associated with the service; Different services are associated with different types of non-terrestrial networks.

26. An access device for a non-terrestrial network, characterized in that, include: A receiving module is used to receive cell access requests, wherein the cell access requests are for requesting access to a cell in a non-terrestrial network; Different services are associated with different types of non-terrestrial networks.

27. A computer-readable storage medium, wherein the computer-readable storage medium is a non-volatile storage medium or a non-transient storage medium, and a computer program is stored thereon, characterized in that, The computer program is executed by a computer to perform the steps of the method according to any one of claims 1 to 23.

28. An access device for a non-terrestrial network, comprising a memory and a processor, wherein the memory stores a computer program executable on the processor, characterized in that, When the processor runs the computer program, it performs the steps of the method according to any one of claims 1 to 23.

29. A computer program product comprising a computer program / instructions, characterized in that, When executed by a computer, the computer program / instructions implement the steps of the method described in any one of claims 1 to 23.

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