Connection Establishment Method, Apparatus, Communication Device, and Storage Medium

Abstract

Embodiments of the present disclosure relate to a connection establishment method, apparatus, communication device, and storage medium. A user equipment (UE) determines a connection waiting duration for the UE to connect to a target base station based on a reference connection waiting duration and a connection waiting duration scaling factor associated with the UE; and after a predetermined connection moment, connects to the target base station based on the connection waiting duration.

Description

[0001] This application is a divisional application of a Chinese application with an application date of October 20, 2020, an application number of 202080002885.2, and an invention title of "Connection Establishment Method, Apparatus, Communication Device, and Storage Medium". Technical Field

[0002] This application relates to the field of wireless communication technologies, but is not limited to wireless communication technologies, and particularly relates to a connection establishment method, apparatus, communication device, and storage medium. Background Art

[0003] In the fifth-generation (5G, 5 th Generation) cellular mobile communication system, non-terrestrial networks (NTN, Non-Terrestrial Networks) are introduced. In the NTN system, as high-altitude platforms such as satellites move, feeder link switches will occur. Here, the wireless link between a high-altitude platform, such as a space-based mobile base station, and service ground stations such as satellite gateways and core network control network nodes is called a feeder link. The satellite will establish feeder links with different control network nodes during its movement. Summary of the Invention

[0004] In view of this, embodiments of the present disclosure provide a connection establishment method, apparatus, communication device, and storage medium.

[0005] According to a first aspect of embodiments of the present disclosure, a connection establishment method is provided, which is applied to a user equipment (UE, User Equipment), and the method includes:

[0006] Determine the connection waiting duration for the UE to connect to a target base station based on a reference connection waiting duration and a connection waiting duration scaling factor associated with the UE.

[0007] After a predetermined connection moment, connect to the target base station based on the connection waiting duration.

[0008] In one embodiment, the method further includes:

[0009] Determine the connection waiting duration scaling factor corresponding to the service characteristic parameter associated with the UE according to the correspondence between the service characteristic parameter and the connection waiting duration scaling factor range.

[0010] In one embodiment, the correspondence between the service characteristic parameter and the connection waiting duration scaling factor range includes:

[0011] The correspondence between the service characteristic parameter range and the connection waiting duration scaling factor range.

[0012] In one embodiment, determining the connection waiting duration scaling factor corresponding to the service characteristic parameter associated with the UE according to the corresponding relationship between the service characteristic parameter and the connection waiting duration scaling factor range includes:

[0013] Determining the connection waiting duration scaling factor from within the connection waiting duration scaling factor range corresponding to the service characteristic parameter range to which the service characteristic parameter associated with the UE belongs.

[0014] In one embodiment, determining the connection waiting duration scaling factor corresponding to the service characteristic parameter associated with the UE according to the corresponding relationship between the service characteristic parameter and the connection waiting duration scaling factor range includes:

[0015] Randomly selecting the connection waiting duration scaling factor from within the connection waiting duration scaling factor range corresponding to the service characteristic parameter associated with the UE.

[0016] In one embodiment, the service characteristic parameter includes: Access Identity, and / or Access Category, and / or 5G QoS Identity parameter and / or Quality of Service (QoS) characteristic parameter.

[0017] In one embodiment, the method further includes at least one of the following:

[0018] Receiving indication information sent by the serving base station indicating the corresponding relationship;

[0019] Determining the corresponding relationship based on the agreement of the communication protocol.

[0020] In one embodiment, determining the connection waiting duration scaling factor corresponding to the service characteristic parameter associated with the UE according to the corresponding relationship between the service characteristic parameter and the connection waiting duration scaling factor range includes:

[0021] In response to at least two service characteristic parameters associated with the UE, determining the connection waiting duration scaling factor from within the connection waiting duration scaling factor range having a smaller connection waiting duration scaling factor among at least two connection waiting duration scaling factor ranges respectively corresponding to the at least two service characteristic parameters associated with the UE.

[0022] In one embodiment, determining the connection waiting duration for the UE to connect to the target base station based on the reference connection waiting duration and the connection waiting duration scaling factor associated with the UE includes:

[0023] Determine the product of the reference connection waiting duration and the connection waiting duration scaling factor as the connection waiting duration of the UE.

[0024] In one embodiment, the method further includes: randomly selecting the connection waiting duration scaling factor, where the connection waiting duration scaling factor does not exceed a preset duration scaling factor range.

[0025] In one embodiment, in response to the reference connection waiting duration being the maximum value of the connection waiting duration, the range of the connection waiting duration scaling factor does not exceed 0 to 1.

[0026] In one embodiment, the method further includes at least one of the following:

[0027] Receiving indication information of the target base station sent by the serving base station;

[0028] Receiving indication information of the reference connection waiting duration sent by the serving base station;

[0029] Receiving indication information of the predetermined connection moment sent by the serving base station.

[0030] In one embodiment, after the predetermined connection moment, connecting to the target base station based on the connection waiting duration includes at least one of the following:

[0031] In response to the UE being in a connected state, after the predetermined connection moment, at an interval of the connection waiting duration, connect to the target base station;

[0032] In response to the UE being in an idle state or an inactive state, and triggering a connection within a trigger connection time interval after the predetermined connection moment, after triggering the connection, at an interval of the connection waiting duration, connect to the target base station.

[0033] In one embodiment, the method further includes: in response to the UE being in a connected state, synchronizing with the target base station at the predetermined connection moment.

[0034] In one embodiment, in response to the UE being in a connected state, after the predetermined connection moment, at an interval of the connection waiting duration, connecting to the target base station includes:

[0035] In response to the UE being in a connected state, after the predetermined connection moment, at an interval of the connection waiting duration, switch to the target base station or initiate a reconstruction to the target base station.

[0036] In one embodiment, the method further includes:

[0037] Receive the indication information for handover or the indication information for reconstruction sent by the serving base station;

[0038] The handover to the target base station or initiating reconstruction to the target base station includes:

[0039] In response to receiving the indication information for handover, hand over to the target base station;

[0040] In response to receiving the indication information for reconstruction, initiate reconstruction to the target base station.

[0041] In one embodiment, the method further includes at least one of the following:

[0042] Receive the indication information sent by the network side indicating the trigger connection time interval;

[0043] Determine the trigger connection time interval based on the agreement of the communication protocol.

[0044] In one embodiment, the method further includes: In response to the UE being in the idle state or the inactive state, and triggering a connection outside the trigger connection time interval after the predetermined connection moment, connect to the target base station after triggering the connection.

[0045] According to the second aspect of the embodiments of the present disclosure, there is provided a connection establishment method, which is applied to a base station, and the method includes:

[0046] Send the indication information indicating the target base station, and / or the indication information indicating the reference connection waiting duration, and / or the indication information indicating the predetermined connection moment to the user equipment UE;

[0047] Wherein, the reference connection waiting duration is used for the UE to determine the connection waiting duration for connecting to the target base station after the predetermined connection moment in combination with the connection waiting duration scaling factor.

[0048] In one embodiment, the method further includes:

[0049] Send the indication information indicating the corresponding relationship between the service characteristic parameters and the range of the connection waiting duration scaling factor to the UE, wherein the corresponding relationship is used for the UE to determine the connection waiting duration scaling factor.

[0050] In one embodiment, the corresponding relationship between the service characteristic parameters and the range of the connection waiting duration scaling factor includes:

[0051] The corresponding relationship between the service characteristic parameter range and the range of the connection waiting duration scaling factor.

[0052] In one embodiment, the method further includes:

[0053] Indication information for instructing handover or indication information for instructing reconstruction sent to the UE.

[0054] In one embodiment, the method further includes:

[0055] Sending indication information for instructing a connection time interval.

[0056] According to a third aspect of the embodiments of the present disclosure, a connection establishment apparatus is provided, which is applied to a user equipment UE. The apparatus includes: a first determination module and a first connection module, where

[0057] The first determination module is configured to determine a connection waiting duration for the UE to connect to a target base station based on a reference connection waiting duration and a connection waiting duration scaling factor associated with the UE.

[0058] The first connection module is configured to connect to the target base station based on the connection waiting duration after a predetermined connection time.

[0059] In one embodiment, the apparatus further includes:

[0060] A second determination module configured to determine a connection waiting duration scaling factor corresponding to a service characteristic parameter associated with the UE according to a correspondence between service characteristic parameters and a connection waiting duration scaling factor range.

[0061] In one embodiment, the correspondence between service characteristic parameters and a connection waiting duration scaling factor range includes:

[0062] A correspondence between a service characteristic parameter range and the connection waiting duration scaling factor range.

[0063] In one embodiment, the second determination module includes:

[0064] A first determination sub-module configured to determine the connection waiting duration scaling factor from within the connection waiting duration scaling factor range corresponding to the service characteristic parameter range to which the service characteristic parameter associated with the UE belongs.

[0065] In one embodiment, the second determination module includes:

[0066] A second determination sub-module configured to randomly select the connection waiting duration scaling factor from within the connection waiting duration scaling factor range corresponding to the service characteristic parameter associated with the UE.

[0067] In one embodiment, the service characteristic parameters include: Access Identity, and / or Access Category, and / or 5QI parameter of the fifth generation service quality identification, and / or QoS characteristic parameters of the service quality.

[0068] In one embodiment, the device further includes at least one of the following:

[0069] A first receiving module, configured to receive indication information sent by a serving base station indicating the corresponding relationship;

[0070] A third determining module, configured to determine the corresponding relationship based on the agreement of the communication protocol.

[0071] In one embodiment, the second determining module includes:

[0072] A third determining sub-module, configured to, in response to at least two of the service characteristic parameters associated with the UE, determine the connection waiting duration scaling factor within the connection waiting duration scaling factor range having a smaller connection waiting duration scaling factor among at least two connection waiting duration scaling factor ranges respectively corresponding to the at least two service characteristic parameters associated with the UE.

[0073] In one embodiment, the first determining module includes:

[0074] A fourth determining sub-module, configured to determine the connection waiting duration of the UE by multiplying the reference connection waiting duration by the connection waiting duration scaling factor.

[0075] In one embodiment, the device further includes:

[0076] A selection module, configured to randomly select the connection waiting duration scaling factor, where the connection waiting duration scaling factor does not exceed a preset duration scaling factor range.

[0077] In one embodiment, in response to the reference connection waiting duration being the maximum value of the connection waiting duration, the range of the connection waiting duration scaling factor does not exceed 0 to 1.

[0078] In one embodiment, the device further includes at least one of the following:

[0079] A second receiving module, configured to receive indication information sent by a serving base station indicating the target base station;

[0080] A third receiving module, configured to receive indication information sent by the serving base station indicating the reference connection waiting duration;

[0081] The fourth receiving module is configured to receive the indication information sent by the serving base station indicating the predetermined connection time.

[0082] In one embodiment, the first connection module includes at least one of the following:

[0083] The first connection sub-module is configured to, in response to the UE being in the connected state, connect to the target base station after an interval of the connection waiting duration after the predetermined connection time.

[0084] The second connection sub-module is configured to, in response to the UE being in the idle state or the inactive state and triggering a connection within the trigger connection time interval after the predetermined connection time, connect to the target base station after an interval of the connection waiting duration after the trigger connection.

[0085] In one embodiment, the device further includes:

[0086] The synchronization module is configured to, in response to the UE being in the connected state, synchronize with the target base station at the predetermined connection time.

[0087] In one embodiment, the first connection sub-module includes:

[0088] The connection unit is configured to, in response to the UE being in the connected state, switch to the target base station or initiate a reconstruction to the target base station after an interval of the connection waiting duration after the predetermined connection time.

[0089] In one embodiment, the device further includes:

[0090] The fifth receiving module is configured to receive the indication information indicating a handover or the indication information indicating a reconstruction sent by the serving base station;

[0091] The connection unit includes:

[0092] The first connection sub-unit is configured to switch to the target base station in response to receiving the indication information indicating a handover;

[0093] The second connection sub-unit is configured to initiate a reconstruction to the target base station in response to receiving the indication information indicating a reconstruction.

[0094] In one embodiment, the device further includes at least one of the following:

[0095] The sixth receiving module is configured to receive the indication information sent by the network side indicating the trigger connection time interval;

[0096] The fourth determination module is configured to determine the trigger connection time interval based on the agreement of the communication protocol.

[0097] In one embodiment, the apparatus further comprises:

[0098] A first connection module, configured to connect to the target base station after triggering a connection in response to the UE being in an idle state or an inactive state and outside a trigger connection time interval after the predetermined connection time.

[0099] According to a fourth aspect of the embodiments of the present disclosure, there is provided a connection establishment apparatus, which is applied to a base station and comprises: a first sending module, wherein,

[0100] The first sending module is configured to send indication information indicating a target base station, and / or indication information indicating a reference connection waiting duration, and / or indication information indicating a predetermined connection time to a user equipment (UE);

[0101] The reference connection waiting duration is used for the UE to determine a connection waiting duration for connecting to the target base station after the predetermined connection time in combination with a connection waiting duration scaling factor.

[0102] In one embodiment, the apparatus further comprises:

[0103] A second sending module, configured to send indication information indicating a correspondence between service characteristic parameters and a range of connection waiting duration scaling factors, where the correspondence is used for the UE to determine the connection waiting duration scaling factor.

[0104] In one embodiment, the correspondence between the service characteristic parameters and the range of connection waiting duration scaling factors includes:

[0105] A correspondence between a range of service characteristic parameters and a range of connection waiting duration scaling factors.

[0106] In one embodiment, the apparatus further comprises:

[0107] A third sending module, configured to send indication information indicating a handover or a reconstruction to the UE.

[0108] In one embodiment, the apparatus further comprises:

[0109] A fourth sending module, configured to send indication information indicating a trigger connection time interval.

[0110] According to a fifth aspect of the embodiments of the present disclosure, there is provided a communication device, comprising a processor, a memory, and an executable program stored in the memory and capable of running on the processor, wherein when the processor runs the executable program, it executes the steps of the connection establishment method as described in the first aspect or the second aspect.

[0111] According to a sixth aspect of the embodiments of the present disclosure, there is provided a storage medium storing computer-executable instructions, wherein, after being executed by a processor, the computer-executable instructions can implement the steps of the connection establishment method as described in the first aspect or the second aspect.

[0112] The connection establishment method, apparatus, communication device, and storage medium provided by the embodiments of the present disclosure. The UE determines the connection waiting duration for connecting to the target base station based on the reference connection waiting duration and the connection waiting duration scaling factor associated with the UE; after a predetermined connection moment, the UE connects to the target base station based on the connection waiting duration. In this way, after the predetermined connection moment, the UE connects to the target base station based on the connection waiting durations respectively associated with each UE, reducing the number of UEs connecting to the target base station at the same moment and alleviating the network congestion situation.

[0113] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the embodiments of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0114] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present invention and used together with the specification to explain the principles of the embodiments of the present invention.

[0115] Figure 1 is a schematic structural diagram of a wireless communication system shown according to an exemplary embodiment;

[0116] Figure 2 is a schematic diagram of feeder link replacement shown according to an exemplary embodiment;

[0117] Figure 3 is a schematic diagram of hard replacement of a feeder link shown according to an exemplary embodiment;

[0118] Figure 4 is a schematic diagram of soft replacement of a feeder link shown according to an exemplary embodiment;

[0119] Figure 5 is a schematic flowchart of a connection establishment method shown according to an exemplary embodiment;

[0120] Figure 6 is a schematic flowchart of another connection establishment method shown according to an exemplary embodiment;

[0121] Figure 7 is a schematic flowchart of yet another connection establishment method shown according to an exemplary embodiment;

[0122] Figure 8 is a block diagram of a connection establishment apparatus shown according to an exemplary embodiment;

[0123] Figure 9 is a block diagram of another connection establishment device shown according to an exemplary embodiment;

[0124] Figure 10 is a block diagram of a device for connection establishment shown according to an exemplary embodiment. Detailed implementation manners

[0125] Here, the exemplary embodiments will be described in detail, and examples thereof are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the embodiments of the present invention. On the contrary, they are merely examples of devices and methods consistent with some aspects of the embodiments of the present invention as detailed in the appended claims.

[0126] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present disclosure. The singular forms "a", "the", and "said" used in the embodiments of the present disclosure and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0127] It should be understood that although the terms first, second, third, etc. may be used in the embodiments of the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the embodiments of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0128] Please refer to Figure 1 , which shows a schematic structural diagram of a wireless communication system provided by the embodiments of the present disclosure. As Figure 1 shown, the wireless communication system is a communication system based on cellular mobile communication technology, and the wireless communication system may include: a plurality of terminals 11 and a plurality of base stations 12.

[0129] Among them, the terminal 11 can be a device that provides voice and / or data connectivity to the user. The terminal 11 can communicate with one or more core networks via a Radio Access Network (RAN). The terminal 11 can be an Internet of Things (IoT) terminal, such as a sensor device, a mobile phone (or a "cellular" phone), and a computer with an IoT terminal. For example, it can be a fixed, portable, pocket-sized, handheld, computer-integrated, or vehicle-mounted device. For example, a Station (STA), a subscriber unit, a subscriber station, a mobile station, a mobile, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, a user device, or a User Equipment (UE). Or, the terminal 11 can also be a device of an unmanned aerial vehicle. Or, the terminal 11 can also be a vehicle-mounted device, such as a vehicle computer with wireless communication functions, or a wireless communication device external to the vehicle computer. Or, the terminal 11 can also be a roadside device, such as a street lamp, a traffic signal, or other roadside devices with wireless communication functions, etc.

[0130] The base station 12 can be a network-side device in a wireless communication system. Among them, the wireless communication system can be a 4th generation mobile communication (4G) system, also known as the Long Term Evolution (LTE) system; or, the wireless communication system can also be a 5G system, also known as the new radio (NR) system or the 5G NR system. Or, the wireless communication system can also be the next generation system after the 5G system. Among them, the access network in the 5G system can be called the NG-RAN (New Generation-Radio Access Network, new generation wireless access network). Or, an MTC system.

[0131] Among them, the base station 12 may be an evolved Node B (eNB) adopted in a 4G system. Alternatively, the base station 12 may also be a gNode B (gNB) with a centralized distributed architecture adopted in a 5G system. When the base station 12 adopts a centralized distributed architecture, it generally includes a central unit (CU) and at least two distributed units (DUs). The protocol stacks of the Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, and Media Access Control (MAC) layer are set in the central unit; the protocol stack of the Physical (PHY) layer is set in the distributed unit. The specific implementation manner of the base station 12 is not limited in the embodiments of the present disclosure.

[0132] A wireless connection can be established between the base station 12 and the terminal 11 through the wireless air interface. In different embodiments, the wireless air interface is a wireless air interface based on the fourth-generation mobile communication network technology (4G) standard; or, the wireless air interface is a wireless air interface based on the fifth-generation mobile communication network technology (5G) standard, such as the new air interface; or, the wireless air interface may also be a wireless air interface based on the standard of the next-generation mobile communication network technology of 5G.

[0133] In some embodiments, an E2E (End to End) connection can also be established between the terminals 11. For example, scenarios such as vehicle-to-vehicle (V2V) communication, vehicle-to-infrastructure (V2I) communication, and vehicle-to-pedestrian (V2P) communication in vehicle-to-everything (V2X) communication.

[0134] In some embodiments, the above wireless communication system may further include a network management device 13.

[0135] A plurality of base stations 12 are respectively connected to a network management device 13. Among them, the network management device 13 may be a core network device in a wireless communication system. For example, the network management device 13 may be a Mobility Management Entity (MME) in an Evolved Packet Core (EPC). Alternatively, the network management device may also be other core network devices, such as a Serving GateWay (SGW), a Public Data Network GateWay (PGW), a Policy and Charging Rules Function (PCRF), or a Home Subscriber Server (HSS), etc. The implementation form of the network management device 13 is not limited in the embodiments of the present disclosure.

[0136] The execution subjects involved in the embodiments of the present disclosure include, but are not limited to: satellites that implement non-terrestrial cellular mobile communication network coverage, user equipment such as mobile phone terminals that perform wireless communication using cellular mobile communication network technology, and base stations, etc.

[0137] An application scenario of the embodiments of the present disclosure is that the feeder link of a Low-Earth Orbit (LEO) satellite is replaced as Figure 2 shown. During the movement of a LEO satellite under transparent transmission, it will switch from the feeder link established with Gateway (GW) 1 to the feeder link established with GW2. Among them, GW1 is connected to base station 1, and GW2 is connected to base station 2. That is, during the movement of the LEO satellite, it will switch from base station 1 to base station 2. If the satellite can only provide services through one feeder link at a time, when the LEO satellite moves, the RRC connections of all UEs served by base station 1 through gateway GW1 need to be disconnected. After base station 2 takes over through GW2, each UE may be able to find the reference signal corresponding to base station 2 and access the cell belonging to base station 2.

[0138] There are two ways to replace the feeder link: hard replacement and soft replacement.

[0139] The hard replacement of the feeder link is as Figure 3As shown in the figure, when a feeder link hard handover occurs for a transparent transmission LEO satellite, that is, only one feeder link connection through this satellite is available during the GW conversion, the signals of the cells served by the LEO satellite will be unavailable during the period from the moment T1 when leaving the old GW to the moment T2 when accessing the new GW. When the old and new GWs correspond to different base stations, the UE needs to access the service cell provided by the LEO satellite again.

[0140] The feeder link soft handover is as Figure 4 As shown in the figure, when a feeder link hard handover occurs for a transparent transmission LEO satellite, that is, two feeder link connections through this satellite are available during the GW conversion. During the GW conversion, the signals of the cells served by the LEO satellite will be available at both Base Station 1 and Base Station 2 from the moment T1 when leaving the old GW to the moment T2 when accessing the new GW, and the UE can change the service cell during the feeder link replacement process.

[0141] Two possible schemes for the UE to establish a connection with the base station are proposed for the feeder link replacement, including:

[0142] Scheme 1: Feeder link hard handover based on precise time control.

[0143] Since there is no overlap between the source cell and the target cell at the base stations located at the old and new GWs, the handover can only be controlled according to the accurate time. Figure 3 During the feeder link hard handover process shown in the figure, the handover command needs to be sent to all UEs served by the LEO satellite before T1. Therefore, the time-triggered conditional handover (CHO) method can be adopted. The UE can start the handover process after T2. Therefore, the handover command should include a handover trigger time.

[0144] Scheme 2: Feeder link hard handover procedure based on conditional radio resource control (RRC) reestablishment.

[0145] Considering that the NTN cells are large, it may be an extremely difficult problem to send handover (HO) commands to a large number of UEs separately in a short time.

[0146] Some UEs may not be able to perform handover (HO) in a timely manner, so a radio link failure may be detected, and then the UE initiates an RRC reconstruction procedure. Reconstructing the RRC connection takes a relatively long time and may involve radio link failure (RLF) detection, cell selection, and possible reconstruction failures, affecting service continuity. Therefore, the network can provide auxiliary information such as the ID of the target cell and / or reconstruction conditions. The auxiliary information can be sent to the UE separately through the system information block (SIB) instead of dedicated signaling, thus effectively reducing the signaling overhead caused by a large number of UEs.

[0147] For Solution 1, considering that all UEs in the serving cell of this LEO satellite have the same target base station, the same handover target base station and trigger time can be sent to these UEs before time T1 by broadcasting. This can effectively reduce the signaling overhead. However, this will cause a large number of UEs to perform handovers at the same time, resulting in network congestion. Similarly, for Solution 2, when a large number of UEs detect a radio link failure and initiate RRC reconstruction, network congestion will also occur.

[0148] As Figure 5 shown, this exemplary embodiment provides a connection establishment method. The connection establishment method can be applied to a user equipment (UE) in wireless communication and includes:

[0149] Step 501: Determine the connection waiting duration for the UE to connect to the target base station based on the reference connection waiting duration and the connection waiting duration scaling factor associated with the UE;

[0150] Step 502: After the predetermined connection moment, connect to the target base station based on the connection waiting duration.

[0151] The UE can be a mobile phone terminal or the like that performs wireless communication using cellular mobile communication network technology. The UE can establish a communication connection with the serving base station through transparent forwarding of the feeder connection between a high-altitude platform such as a satellite and a satellite ground station such as a gateway GW. The high-altitude platform is shown in Table 1.

[0152] Table 1

[0153]

[0154]

[0155] In Table 1, except for GEO satellites, during the movement of other high-altitude platforms, feeder link replacement usually occurs. The method of the embodiment of the present invention can be used in, but not limited to, NTN communication systems with feeder link replacement.

[0156] The following invention embodiments explain the method of the invention embodiments through an NTN communication system using a LEO satellite platform. However, it does not mean that the method of the invention embodiments is only applicable to the NTN communication system using a LEO satellite platform.

[0157] As Figure 2 shown, during the movement of a LEO satellite under transparent transmission, it will switch from the feeder link established with gateway (GW, Gate Way) 1 to the feeder link established with GW2, where GW1 is connected to base station 1 and GW2 is connected to base station 2. That is, during the movement of the LEO satellite, it will switch from base station 1 to base station 2. Here, the base station can be a gNB in 5G cellular mobile communication.

[0158] The target base station is the base station to which the UE switches from the current serving base station during the movement of the LEO satellite. For example, as Figure 2 described, at time T1, gNB1 is connected to the UE through GW1 and the LEO satellite, and gNB1 is the serving base station of the UE. During the movement of the LEO satellite, that is, from time T1 to time T2, the base station connected to the UE switches from gNB1 to gNB2. gNB2 is the target base station.

[0159] The reference connection waiting duration can be a fixed duration. The reference connection waiting duration can be specified by a communication protocol, or determined by the core network or base station, etc., based on the number of UEs covered by the LEO satellite signal, and / or the number of UEs that need to connect to the target base station, etc.

[0160] The connection waiting duration scaling factor can be used to adjust the connection waiting duration of the UE based on the reference connection waiting duration. The connection waiting duration scaling factor is associated with the UE, and different UEs can have different connection waiting duration scaling factors. Here, the connection waiting duration scaling factor can be associated with the UE type, or associated with the current service characteristics of the UE, etc.

[0161] Based on the reference connection waiting duration and the connection waiting duration scaling factor associated with the UE, the connection waiting duration of each UE can be obtained. Since the connection waiting duration scaling factors are different, the connection waiting durations of each UE are also different. Exemplarily, the product of the reference connection waiting duration and the connection waiting duration scaling factor, or the quotient of the reference connection waiting duration divided by the connection waiting duration scaling factor can be determined as the connection waiting duration, where when the division method is used to determine the connection waiting duration, the connection waiting duration scaling factor is not 0. Here, the connection waiting duration scaling factor can be a non - negative number less than or equal to 1, or a positive number greater than 1.

[0162] The predetermined connection time can be the time when the serving base station indicates to start switching to the target base station, or the time when the satellite establishes a connection with the target base station, etc. As Figure 2As described above, the predetermined connection time can be time T2. The UE can connect to the target base station based on the predetermined connection time and the connection waiting duration. For example, it can connect to the target base station at an interval of the connection waiting duration after the predetermined connection time. Since the connection waiting duration of each UE is different, the time when the UE connects to the target base station is also different. In this way, the number of UEs connecting to the target base station at the same time is reduced, alleviating the network congestion situation.

[0163] In this way, after the predetermined connection time, based on the connection waiting durations respectively associated with the UEs, connect to the target base station, reducing the number of UEs connecting to the target base station at the same time and alleviating the network congestion situation.

[0164] In one embodiment, the method further includes:

[0165] Determine the connection waiting duration scaling factor corresponding to the service characteristic parameter associated with the UE according to the correspondence between the service characteristic parameter and the connection waiting duration scaling factor range.

[0166] Here, the service characteristic parameter can be a type parameter, a priority parameter, a rate parameter, and / or a transmission quality requirement parameter, etc., of the data currently transmitted by the UE. For example: the service characteristic parameter can be the priority (PriorityLevel) in QoS. Different service characteristic parameters are associated with different connection waiting duration scaling factor ranges.

[0167] The UE can determine the connection waiting duration scaling factor from within the connection waiting duration scaling factor range corresponding to its own current service characteristic parameter. The UE can determine the connection waiting duration scaling factor from within the connection waiting duration scaling factor range based on a predetermined selection rule. For example, the predetermined selection rule can stipulate to select the corresponding connection waiting duration scaling factor from within the connection waiting duration scaling factor range based on the signal strength of the UE.

[0168] Exemplarily, the UE obtains the correspondence between the connection waiting duration scaling factor and the service characteristic parameter AccessIdentity through system broadcast. When Access Identity = 1, the connection waiting duration scaling factor ∈ [Pl_1, Pu_1], where 0 ≤ Pl_1 ≤ Pu_1 ≤ 1. When Access Identity = 2, the connection waiting duration scaling factor ∈ [Pl_2, Pu_2], where 0 ≤ Pl_2 ≤ Pu_2 ≤ 1. When Access Identity = 11, 12,..., etc., the setting is the same as above.

[0169] If the Access Identity stored in the UE is 1 respectively. Then the service characteristic parameter range corresponding to this UE is [Pl_1, Pu_1].

[0170] The UE can determine the connection waiting duration scaling factor within the range of [Pl_1, Pu_1].

[0171] In this way, UEs with different service characteristic parameters obtain different value ranges of the connection waiting duration scaling factor, and the obtained connection waiting duration scaling factors are different, so that different connection waiting durations can be determined. The UE connects to the target base station based on different connection waiting durations, reducing the number of UEs connecting to the target base station at the same moment and alleviating the network congestion situation.

[0172] In one embodiment, the correspondence between the service characteristic parameter and the connection waiting duration scaling factor range includes:

[0173] The correspondence between the service characteristic parameter range and the connection waiting duration scaling factor range.

[0174] Since the number of available values of the service characteristic parameter is relatively large, the correspondence between the service characteristic parameter range and the connection waiting duration scaling factor range can be established. The available values of the service characteristic parameter can be divided into multiple different ranges, and each service characteristic parameter range corresponds to a connection waiting duration scaling factor range. The connection waiting duration scaling factor ranges corresponding to different service characteristic parameter ranges can be the same or different.

[0175] The UE can determine the connection waiting duration scaling factor based on the correspondence between the service characteristic parameter range and the connection waiting duration scaling factor range.

[0176] Exemplarily, the service characteristic parameter can be the packet delay budget (PDB). All PDBs can be divided into N ranges, where N is a positive integer greater than or equal to 1. Each PDB range corresponds to a connection waiting duration scaling factor range. The UE can select the PDB range corresponding to its own PDB, and then determine the corresponding connection waiting duration scaling factor range.

[0177] For example, the PDB sequence is PDBreference = {PDBreference_1,..., PDUeference_n,..., PDBreference_N}, where 0 < PDBreference_1 <,..., < PDBreference_n <,..., < PDBreference_N. And obtain the connection waiting duration scaling factor corresponding to each PDB, and denote the sequence composed of the connection waiting duration scaling factors as P = {P_1,..., P_N}, where 0 < P_1 <,..., < P_n <,..., < P_N < 1.

[0178] The UE obtains the PDB corresponding to the QoS (flow) Flow according to the 5QI of the ongoing service.

[0179] If 0 ≤ PDB ≤ PDBreference_1, the UE can determine the connection waiting duration scaling factor within the range [0, P_1] of the connection waiting duration scaling factor. If PDBminreference_n-1 < PDBmin ≤ PDBminreference_n, the UE can determine the connection waiting duration scaling factor within the range (P_n-1, P_n] of the connection waiting duration scaling factor.

[0180] If PDBmin > PDUminreference_N, the UE can determine the connection waiting duration scaling factor within the range (P_n, 1] of the connection waiting duration scaling factor.

[0181] In one embodiment, determining the connection waiting duration scaling factor corresponding to the service characteristic parameter associated with the UE according to the corresponding relationship between the service characteristic parameter and the connection waiting duration scaling factor range includes:

[0182] Determining the connection waiting duration scaling factor from within the connection waiting duration scaling factor range corresponding to the service characteristic parameter range to which the service characteristic parameter associated with the UE belongs.

[0183] Exemplarily, the service characteristic parameter can be PDB. All PDBs can be divided into N ranges, where N is a positive integer greater than or equal to 1. Each PDB range corresponds to a connection waiting duration scaling factor range. The UE can select the PDB range to which its own PDB belongs, then determine the connection waiting duration scaling factor range corresponding to this PDB range, and further determine the connection waiting duration scaling factor from within the connection waiting duration scaling factor range.

[0184] In one embodiment, determining the connection waiting duration scaling factor corresponding to the service characteristic parameter associated with the UE according to the corresponding relationship between the service characteristic parameter and the connection waiting duration scaling factor range includes:

[0185] Randomly selecting the connection waiting duration scaling factor from within the connection waiting duration scaling factor range corresponding to the service characteristic parameter associated with the UE.

[0186] Here, the UE can randomly obtain a value from within the determined connection waiting duration scaling factor range as its own connection waiting duration scaling factor.

[0187] Exemplarily, the UE can generate a random number rand within the connection waiting duration scaling factor range, and this random number can be evenly distributed within the connection waiting duration scaling factor range. Based on the randomly generated connection waiting duration scaling factor and in combination with the reference connection waiting duration, the connection waiting duration is determined.

[0188] In this way, by randomly selecting values within the range of the connection waiting duration scaling factor, the situation of the same values being taken is reduced, and further, the situation of the same connection waiting duration values is reduced. The UE connects to the target base station based on different connection waiting durations, reducing the number of UEs connecting to the target base station at the same moment and alleviating the network congestion situation.

[0189] In one embodiment, the service characteristic parameters include: Access Identity, and / or Access Category, and / or the 5th Generation Quality of Service Indicator (5QI) parameter and / or the Quality of Service (QoS) characteristic parameter.

[0190] The 5G system should be able to use relevant restriction parameters to limit the access rights of the UE to the network, and these restriction parameters vary according to different Access Identities and Access Categories. The Access Identity is configured in the UE, as shown in Table 2. The Access Category is defined by the combination of conditions related to the UE and the type of access attempt, as shown in Table 3.

[0191] Table 2

[0192]

[0193] Table 3

[0194]

[0195]

[0196] In the 5G system, the QoS model is based on QoS flows. A QoS flow is a Protocol Data Unit (PDU), which is the finest QoS differentiation granularity in a PDU session. That is to say, the difference between two PDU sessions lies in their different QoS flows; in the 5G system, a QoS Flow Identifier (QFI) is used to identify a QoS flow, and the QFI can be dynamically configured or equal to 5QI.

[0197] The standardized 5QI values are used to specify common services and can be mapped to 5G QoS characteristics. The mapping between the standardized 5QI values and the 5G QoS characteristics is shown in Table 4.

[0198] Table 4

[0199]

[0200]

[0201]

[0202]

[0203] In one embodiment, the method further includes at least one of the following:

[0204] Receiving indication information sent by a serving base station indicating the corresponding relationship;

[0205] Determining the corresponding relationship based on the agreement of the communication protocol.

[0206] Here, the corresponding relationship between the service characteristic parameters and the range of the connection waiting duration scaling factor can be sent by the serving base station to the UE. The serving base station can send the corresponding relationship to the UE in a broadcast manner. For example, the serving base station can carry the indication information indicating the corresponding relationship in the system information and broadcast it. After receiving the system information, the UE determines the corresponding relationship.

[0207] The corresponding relationship between the service characteristic parameters and the range of the connection waiting duration scaling factor can also be agreed upon by the communication protocol, and the user equipment determines the corresponding relationship based on the communication protocol. The corresponding relationship between the service characteristic parameters and the range of the connection waiting duration scaling factor can also be agreed upon by the serving base station and the UE, and the user equipment determines the connection waiting duration scaling factor based on the agreed corresponding relationship.

[0208] In one embodiment, determining the connection waiting duration scaling factor corresponding to the service characteristic parameters associated with the UE according to the corresponding relationship between the service characteristic parameters and the range of the connection waiting duration scaling factor includes:

[0209] In response to at least two of the service characteristic parameters associated with the UE, within the range of the connection waiting duration scaling factor having a smaller connection waiting duration scaling factor among the at least two ranges of the connection waiting duration scaling factors corresponding to the at least two service characteristic parameters associated with the UE, determining the connection waiting duration scaling factor.

[0210] The UE can usually perform data transmission for multiple services simultaneously. The service characteristic parameters of multiple services are different, or the service characteristic parameters of different data in one service are different. That is, the current service characteristic parameters of the UE can have multiple, and multiple service characteristic parameters can respectively correspond to a range of the connection waiting duration scaling factor.

[0211] Here, the UE can select from the range of the connection waiting duration scaling factor having a smaller connection waiting duration scaling factor.

[0212] Exemplarily, the UE obtains the correspondence between the service characteristic parameter range and the connection waiting duration scaling coefficient range through system broadcast, where the service characteristic parameter may be PDB. Let the sequence of PDB reference values be PDBminreference = {PDBminreference_1, …, PDUminreference_n, …, PDBminreference_N}, where 0 < PDBminreference_1 <, …, < PDBminreference_n <,..., < PDBminreference_N. And obtain the connection waiting duration scaling coefficient corresponding to each PDB, and denote the sequence composed of the connection waiting duration scaling coefficients as P = {P_1, …, P_N}, where 0 < P_1 <, …, < P_n <,..., < P_N < 1.

[0213] The UE can obtain the corresponding PDB according to the 5QI of all uplink and downlink QoS Flows of the ongoing service, and obtain the minimum value PDBmin among the PDBs corresponding to all QoS Flows. The connection waiting duration scaling coefficient range corresponding to PDBmin has a smaller connection waiting duration scaling coefficient. The UE can select the connection waiting duration within the connection waiting duration scaling coefficient range corresponding to PDBmin.

[0214] If 0 ≤ PDBmin ≤ PDBminreference_1, the UE can take a value in [0, P_1] as the connection waiting duration.

[0215] If PDBminreference_n - 1 < PDBmin ≤ PDBminreference_n, the UE can take a value in (P_n - 1, P_n] as the connection waiting duration.

[0216] If PDBmin > PDUminreference_N, the UE can take a value in (P_n, 1] as the connection waiting duration.

[0217] For another example, the UE obtains the correspondence between the service characteristic parameter range and the connection waiting duration scaling coefficient range through system broadcast, where the service characteristic parameter may be Access Identity. When Access Identity = 1, the connection waiting duration scaling coefficient ∈ [Pl_1, Pu_1], where 0 ≤ Pl_1 ≤ Pu_1 ≤ 1, when Access Identity = 2, the connection waiting duration scaling coefficient ∈ [Pl_2, Pu_2], where 0 ≤ Pl_2 ≤ Pu_2 ≤ 1, and when Access Identity = 11, 12, …, etc., the setting is the same.

[0218] If there are two Access Identities in the UE, which are 1 and 2 respectively. Given that Pl_1 > Pl_2 and Pu_1 > Pu_2, then Pl_new = Pl_2 and Pu_new = Pu_2. That is, the range of the connection waiting duration scaling factor corresponding to this UE is [Pl_2, Pu_2].

[0219] The UE can take a value within [Pl_2, Pu_2] as the connection waiting duration.

[0220] In one embodiment, determining the connection waiting duration for the UE to connect to the target base station based on the reference connection waiting duration and the connection waiting duration scaling factor associated with the UE includes:

[0221] Taking the product of the reference connection waiting duration and the connection waiting duration scaling factor as the connection waiting duration of the UE.

[0222] After the UE determines the connection waiting duration scaling factor, it can multiply the reference connection waiting duration by the connection waiting duration scaling factor and take the product as the connection waiting duration.

[0223] Exemplarily, after the UE determines the range of the connection waiting duration scaling factor, the UE generates a random number rand within the range of the connection waiting duration scaling factor, and the random number can be evenly distributed within the range of the waiting duration scaling factor. The connection waiting duration corresponding to the UE is: rand * T0, where T0 is the reference connection waiting duration.

[0224] In one embodiment, the method further includes: randomly selecting the connection waiting duration scaling factor, where the connection waiting duration scaling factor does not exceed the preset duration scaling factor range.

[0225] If the base station does not broadcast the correspondence between the service characteristic parameters and the range of the connection waiting duration scaling factor, the UE can take a random number within the preset duration scaling factor range as the waiting duration scaling factor.

[0226] Here, the preset duration scaling factor range can be set in advance. The preset duration scaling factor range and the range of the connection waiting duration scaling factor can be the same or different.

[0227] In one embodiment, in response to the reference connection waiting duration being the maximum value of the connection waiting duration, the range of the connection waiting duration scaling factor does not exceed 0 to 1.

[0228] Here, the reference connection waiting duration can be the maximum value of the connection waiting duration. For this reference connection waiting duration, the range of the connection waiting duration scaling factor is: [0, 1].

[0229] In one embodiment, the method further includes at least one of the following:

[0230] Receiving indication information of the target base station sent by the serving base station;

[0231] Receiving indication information of the reference connection waiting duration sent by the serving base station;

[0232] Receiving indication information of the predetermined connection moment sent by the serving base station.

[0233] Here, the indication information of the target base station, and / or the indication information of the reference connection waiting duration, and / or the indication information of the predetermined connection moment can be sent by the serving base station to the UE. The serving base station can send the indication information of the target base station, and / or the indication information of the reference connection waiting duration, and / or the indication information of the predetermined connection moment to the UE in a broadcast manner. For example, the serving base station can carry the indication information of the target base station, and / or the indication information of the reference connection waiting duration, and / or the indication information of the predetermined connection moment in the system information and broadcast it.

[0234] Here, the indication information of the target base station can be the base station identifier of the target base station, etc.

[0235] The UE determines the target base station, the predetermined connection moment Te, and / or the reference connection waiting duration T0, etc. by receiving the indication information sent by the serving base station.

[0236] In one embodiment, after the predetermined connection moment, connecting to the target base station based on the connection waiting duration includes at least one of the following:

[0237] In response to the UE being in the connected state, after the predetermined connection moment, connecting to the target base station after an interval of the connection waiting duration;

[0238] In response to the UE being in the idle state or the inactive state, and triggering a connection within the trigger connection time interval after the predetermined connection moment, after triggering the connection, connecting to the target base station after an interval of the connection waiting duration.

[0239] The serving base station can indicate to the UE a CHO method based on the time of departure. The serving base station can send indication information to indicate the target base station, the predetermined connection time Te, and / or the reference connection waiting duration T0, etc. The UE in the connected state determines the target base station, the predetermined connection time Te, and / or the reference connection waiting duration T0, etc. by receiving the indication information sent by the serving base station. The predetermined connection time Te can be the trigger time of CHO. The UE can determine the connection waiting duration based on the reference connection waiting duration. And after the predetermined connection time, continue to wait for the connection waiting duration and then connect to the target base station.

[0240] In this way, the UE in the connected state connects to the target base station based on different connection waiting durations, reducing the number of UEs connecting to the target base station at the same time and alleviating the network congestion situation.

[0241] If the UE is in the idle state or the inactive state at the predetermined connection time, a trigger connection time interval can be set. The trigger connection time interval is after the predetermined connection time. The trigger connection time interval can be a time period when each UE changes from the serving base station to the target base station relatively frequently. If a UE in the idle state or the inactive state triggers a connection to the base station within the trigger connection time interval, such as when it needs to send a connection establishment request message, it can wait for the connection waiting duration after triggering the connection to the base station and then connect to the target base station. That is, when it is determined that a connection establishment request message needs to be sent, the connection establishment request message can be sent after waiting for the connection waiting duration.

[0242] In one embodiment, the method further includes at least one of the following:

[0243] Receiving indication information sent by the network side indicating the trigger connection time interval;

[0244] Determining the trigger connection time interval based on the agreement of the communication protocol.

[0245] Here, the base station can send indication information indicating the trigger connection time interval to the UE through broadcasting or other means. Here, the base station can be the serving base station of the UE in the connected state when the UE is in the idle state or the inactive state, or the anchor base station of the idle state or inactive state UE, etc.

[0246] Exemplarily, the idle state UE obtains the trigger connection time interval Tx through network broadcasting. Among them, Tx can be less than or equal to the reference connection waiting duration T0. When the predetermined connection time Te arrives, Tx is started. If the idle state UE starts the transmission of the connection establishment request message before Tx times out, then the connection waiting duration T is started. When T times out, the UE sends the connection establishment request message and connects to the target base station.

[0247] The trigger connection time interval can also be agreed upon by the communication protocol. The UE can determine the trigger connection time interval based on the communication protocol.

[0248] The trigger connection time interval can also be agreed upon by the base station and the UE. The user equipment determines the connection waiting duration scaling factor based on the agreed trigger connection time interval.

[0249] In this way, the UE in the idle state or the inactive state connects to the target base station based on different connection waiting durations, reducing the number of UEs connecting to the target base station at the same moment and alleviating the network congestion situation.

[0250] In one embodiment, the method further includes: in response to the UE being in the idle state or the inactive state and triggering a connection outside the trigger connection time interval after the predetermined connection moment, connecting to the target base station after triggering the connection.

[0251] The trigger connection time interval can be a time period when UEs change from the serving base station to the target base station relatively frequently. After the trigger connection time interval, the number of UEs changing from the serving base station to the target base station decreases, and it is not easy to cause network congestion. Therefore, if a UE in the idle state or the inactive state triggers a connection to the base station after the trigger connection time interval, it can directly establish a connection with the target base station. In this way, the waiting time can be reduced and the timeliness of connecting to the target base station can be improved.

[0252] In one embodiment, the method further includes: in response to the UE being in the connected state, synchronizing with the target base station at the predetermined connection moment.

[0253] During the process of the UE establishing a connection with the target base station, such as in the random access process, the UE needs to complete synchronization with the target base station. The UE can synchronize with the target base station at the predetermined connection moment. In this way, the efficiency of establishing an RRC connection during the connection waiting duration can be improved.

[0254] Exemplarily, when the predetermined connection moment arrives, the UE can start a timer to time the connection waiting duration T, and at the same time, the UE synchronizes with the cell of the target base station. When T times out, initiate random access, RRC reconfiguration and other handover processes.

[0255] Or, when the predetermined connection moment arrives, the UE can start a timer to time the connection waiting duration T. When T times out, it triggers the UE to synchronize with the cell of the target base station, and initiates random access, RRC reconfiguration and other handover processes.

[0256] In one embodiment, the step of, in response to the UE being in the connected state, connecting to the target base station after an interval of the connection waiting duration after the predetermined connection moment includes:

[0257] In response to the UE being in the connected state, after an interval of the connection waiting duration after the predetermined connection moment, switching to the target base station or initiating a reconstruction to the target base station.

[0258] Here, connecting to the target base station may include switching to the target base station or initiating a reconstruction to the target base station.

[0259] In one embodiment, the method further includes: receiving indication information for switching or indication information for reconstruction sent by the serving base station;

[0260] The switching to the target base station or initiating a reconstruction to the target base station includes:

[0261] Switching to the target base station in response to receiving the indication information for switching;

[0262] Initiating a reconstruction to the target base station in response to receiving the indication information for reconstruction.

[0263] The serving base station may send indication information to the UE to indicate whether the UE should switch to the target cell or perform a reconstruction with the target cell. The serving base station may send the indication information in a broadcast manner.

[0264] Exemplarily, the serving base station uses broadcast to indicate that the UE connects to the target base station by means of switching. The UE finds the corresponding configuration in the CHO according to the identifier of the target base station of the serving base station, and then triggers the handover. If the corresponding configuration in the CHO cannot be found, a reconstruction can be triggered.

[0265] If the serving base station uses broadcast to indicate that the UE connects to the target base station by means of reconstruction, when the UE performs a reconstruction, the UE initiates a reconstruction to the target base station according to the identifier of the target base station broadcast by the network.

[0266] As Figure 6 shown, this exemplary embodiment provides a connection establishment method. The connection establishment method can be applied to a base station in wireless communication and includes:

[0267] Step 601: Sending indication information indicating the target base station, and / or indication information indicating the reference connection waiting duration, and / or indication information indicating the predetermined connection time to the UE;

[0268] Wherein, the reference connection waiting duration is used for the UE to determine the connection waiting duration for connecting to the target base station after the predetermined connection time in combination with the connection waiting duration scaling factor.

[0269] The UE may be a mobile phone terminal or the like that performs wireless communication using cellular mobile communication network technology. The UE may establish a communication connection with the serving base station through transparent forwarding of the feeder connection between a high-altitude platform such as a satellite and a satellite ground station such as a gateway GW. The high-altitude platform is shown in Table 1 here.

[0270] In Table 1, except for GEO satellites, during the movement of other high-altitude platforms, the replacement of feeder links usually occurs. The method of the embodiment of the present invention can be used in, but not limited to, NTN communication systems where feeder link replacement occurs.

[0271] The following embodiments of the invention explain the method of the embodiments of the present invention through an NTN communication system using a LEO satellite platform. However, it does not mean that the method of the embodiments of the present invention is only used in the NTN communication system of the LEO satellite platform.

[0272] As Figure 2 shown, during the movement of a LEO satellite under transparent transmission, the feeder link established with Gateway (GW) 1 will be replaced with the feeder link established with GW2. Among them, GW1 is connected to Base Station 1, and GW2 is connected to Base Station 2. That is, during the movement of the LEO satellite, it will switch from Base Station 1 to Base Station 2. Here, the base station can be a gNB in 5G cellular mobile communication.

[0273] The target base station is the base station that the UE switches to from the current serving base station during the movement of the LEO satellite. For example, as Figure 2 described, at time T1, gNB1 is connected to the UE through GW1 and the LEO satellite, and gNB1 is the serving base station of the UE. During the movement of the LEO satellite, that is, from time T1 to T2, the base station connected to the UE switches from gNB1 to gNB2. gNB2 is the target base station.

[0274] The reference connection waiting duration can be a fixed duration. The reference connection waiting duration can be specified by a communication protocol, or determined by the core network or base station, etc., based on the number of UEs covered by the LEO satellite signal, and / or the number of UEs that need to be connected to the target base station, etc.

[0275] The connection waiting duration scaling factor can be used to adjust the connection waiting duration of the UE based on the reference connection waiting duration. The connection waiting duration scaling factor is associated with the UE, and different UEs can have different connection waiting duration scaling factors. Here, the connection waiting duration scaling factor can be associated with the UE type, or associated with the current service characteristics of the UE, etc.

[0276] Based on the reference connection waiting duration and the connection waiting duration scaling factor associated with the UE, the connection waiting duration of each UE can be obtained. Since the connection waiting duration scaling factors are different, the connection waiting durations of each UE are also different. Exemplarily, the product of multiplying the reference connection waiting duration by the connection waiting duration scaling factor, or the quotient of dividing the reference connection waiting duration by the connection waiting duration scaling factor can be determined as the connection waiting duration, where when the division method is used to determine the connection waiting duration, the connection waiting duration scaling factor is not 0. Here, the connection waiting duration scaling factor can be a non-negative number less than or equal to 1, or a positive number greater than 1.

[0277] The predetermined connection moment can be the moment when the serving base station indicates to start switching to the target base station, or the moment when the satellite establishes a connection with the target base station, etc. As Figure 2 described, the predetermined connection moment can be the T2 moment. The UE can connect to the target base station based on the predetermined connection moment and the connection waiting duration. For example, it can connect to the target base station at an interval of the connection waiting duration after the predetermined connection moment. Since the connection waiting durations of each UE are different, the moments when the UE connects to the target base station are also different. In this way, the number of UEs connecting to the target base station at the same moment is reduced, alleviating the network congestion situation.

[0278] In this way, after the predetermined connection moment, based on the connection waiting durations respectively associated with each UE, connect to the target base station, reducing the number of UEs connecting to the target base station at the same moment, alleviating the network congestion situation.

[0279] Here, the indication information indicating the target base station, and / or the indication information indicating the reference connection waiting duration, and / or the indication information indicating the predetermined connection moment can be sent by the serving base station to the UE. The serving base station can broadcast the indication information indicating the target base station, and / or the indication information indicating the reference connection waiting duration, and / or the indication information indicating the predetermined connection moment to the UE. For example, the serving base station can carry the indication information indicating the target base station, and / or the indication information indicating the reference connection waiting duration, and / or the indication information indicating the predetermined connection moment in the system information and broadcast it.

[0280] Here, the indication information indicating the target base station can be the base station identifier of the target base station, etc.

[0281] The UE determines the target base station, the predetermined connection moment Te, and / or the reference connection waiting duration T0, etc. by receiving the indication information sent by the serving base station.

[0282] In one embodiment, as Figure 7 shown, the method further includes:

[0283] Step 602: Send indication information to the UE indicating the correspondence between the service characteristic parameters and the range of the connection waiting duration scaling factor, where the correspondence is used for the UE to determine the connection waiting duration scaling factor.

[0284] Here, the correspondence between the service characteristic parameters and the range of the connection waiting duration scaling factor can be sent from the serving base station to the UE. The serving base station can send the correspondence to the UE in a broadcast manner. For example, the serving base station can carry the indication information indicating the correspondence in the system information for broadcasting. After receiving the system information, the UE determines the correspondence.

[0285] The UE can randomly select a value from the determined range of the connection waiting duration scaling factor as its own connection waiting duration scaling factor.

[0286] Exemplarily, the UE can generate a random number rand within the range of the connection waiting duration scaling factor, and this random number can be evenly distributed within the range of the connection waiting duration scaling factor. Based on the randomly generated connection waiting duration scaling factor and in combination with the reference connection waiting duration, the connection waiting duration is determined.

[0287] In this way, by randomly selecting values within the range of the connection waiting duration scaling factor, the situation of the same value is reduced, and further, the situation of the same value of the connection waiting duration is reduced. The UE connects to the target base station based on different connection waiting durations, reducing the number of UEs connecting to the target base station at the same moment and alleviating the network congestion situation.

[0288] In one embodiment, the correspondence between the service characteristic parameters and the range of the connection waiting duration scaling factor includes:

[0289] The correspondence between the service characteristic parameter range and the range of the connection waiting duration scaling factor.

[0290] Since the number of available values of the service characteristic parameters is relatively large, therefore, the correspondence between the service characteristic parameter range and the range of the connection waiting duration scaling factor can be established. The available values of the service characteristic parameters can be divided into multiple different ranges, and each service characteristic parameter range corresponds to a range of the connection waiting duration scaling factor. The ranges of the connection waiting duration scaling factor corresponding to different service characteristic parameter ranges can be the same or different.

[0291] The UE can determine the connection waiting duration scaling factor based on the correspondence between the service characteristic parameter range and the range of the connection waiting duration scaling factor.

[0292] Exemplarily, the service characteristic parameter may be the packet delay budget (PDB). All PDBs may be divided into N ranges, where N is a positive integer greater than or equal to 1. Each PDB range corresponds to a connection waiting duration scaling factor range. The UE may select the PDB range corresponding to its own PDB, and then determine the corresponding connection waiting duration scaling factor range.

[0293] For example, the PDB sequence is PDBreference = {PDBreference_1,..., PDUeference_n,..., PDBreference_N}, where 0 < PDBreference_1 <,..., < PDBreference_n <,..., < PDBreference_N. And obtain the connection waiting duration scaling factor corresponding to each PDB. Denote the sequence composed of the connection waiting duration scaling factors as P = {P_1,..., P_N}, where 0 < P_1 <,..., < P_n <,..., < P_N < 1.

[0294] The UE obtains the PDB corresponding to the QoS (flow) Flow according to the 5QI of the ongoing service.

[0295] If 0 ≤ PDB ≤ PDBreference_1, the UE may determine the connection waiting duration scaling factor within the range [0, P_1] of the connection waiting duration scaling factor. If PDBminreference_n - 1 < PDBmin ≤ PDBminreference_n, the UE may determine the connection waiting duration scaling factor within the range (P_n - 1, P_n] of the connection waiting duration scaling factor.

[0296] If PDBmin > PDUminreference_N, the UE may determine the connection waiting duration scaling factor within the range (P_n, 1] of the connection waiting duration scaling factor.

[0297] In one embodiment, the method further includes:

[0298] Sending indication information for indicating handover or indication information for indicating reconstruction to the UE.

[0299] Here, the connection target base station may include switching to the target base station or initiating reconstruction to the target base station.

[0300] The serving base station may send indication information to the UE to indicate whether the UE should switch to the target cell or reconstruct with the target cell. The serving base station may send the indication information in a broadcast manner.

[0301] Exemplarily, the serving base station instructs the UE to connect to the target base station by means of a broadcast. The UE finds the corresponding configuration in the CHO according to the identifier of the target base station of the serving base station, and subsequently triggers the handover. If the corresponding configuration in the CHO is not found, the reconstruction can be triggered.

[0302] If the serving base station instructs the UE to connect to the target base station in a reestablished manner by broadcasting, when the UE adopts the reestablishment, the UE initiates the reestablishment to the target base station according to the identifier of the target base station broadcasted by the network.

[0303] In one embodiment, the method further comprises:

[0304] Sending indication information indicating the time interval for triggering the connection.

[0305] If the UE is in an idle state or inactive state at the scheduled connection time, a trigger connection time interval can be set. The trigger connection time interval is located after the scheduled connection time. The trigger connection time interval can be a time period in which each UE frequently switches from the serving base station to the target base station. If a UE in an idle state or inactive state triggers the connection base station within the trigger connection time interval, if a connection establishment request message needs to be sent, the connection establishment request message can be connected to the target base station after the connection base station is triggered. That is, when it is determined that a connection establishment request message needs to be sent, the connection establishment request message can be sent after the connection waiting time interval.

[0306] Here, the serving base station may send indication information indicating the time interval for triggering the connection to the UE by broadcasting or other means.

[0307] Exemplarily, the idle UE obtains the trigger connection time interval Tx through network broadcast, where Tx can be less than or equal to =<reference connection waiting time T0. When the predetermined connection time Te is reached, Tx is started. If the idle UE starts the transmission of the connection establishment request message before Tx times out, the connection waiting time T is started. When T times out, the UE sends a connection establishment request message to connect to the target base station.

[0308] In this way, UEs in an idle state or an inactive state connect to a target base station based on different connection waiting times, thereby reducing the number of UEs connected to the target base station at the same time and alleviating network congestion.

[0309] A specific example is provided below in combination with any of the above embodiments:

[0310] The complete content of the technical solution provided by the example of the present invention includes:

[0311] 1. The UE obtains the indication information of the target base station through system broadcast, such as the target gNB identifier, the scheduled connection time Te and the reference connection waiting time, such as the maximum waiting time T0.

[0312] 2. The network configures the correspondence between the connection waiting time scaling factor and the service characteristic parameters. The UE selects the corresponding connection waiting time scaling factor according to its own service characteristic parameters. The service characteristic parameters can be indicated by AccessIdentity, Access Category, 5QI, QoS characteristic parameters, etc.

[0313] 3. If the network does not broadcast the correspondence between the connection waiting time scaling factor and the service characteristic parameters, the UE generates a random number between 0 and 1 as the connection waiting time scaling factor.

[0314] 4. The UE scales T0 to obtain the connection waiting time timer T, and the connection waiting time scaling factor is determined by 2 and 3.

[0315] 5. The network can instruct the connected UE to reestablish or switch through broadcast.

[0316] 6. When the UE uses handover, the UE finds the corresponding configuration in CHO according to the gNB identifier broadcast by the network, and subsequently triggers handover. If the corresponding configuration in CHO is not found, reconstruction is subsequently triggered.

[0317] 7. When the UE adopts reestablishment, the UE initiates reestablishment to the target gNB according to the gNB identifier broadcast by the network.

[0318] 8. When the Te moment is reached, T is started. When T times out, the switching or reconstruction process is triggered.

[0319] 9. Based on 8, the UE can synchronize with the target cell when the Te time arrives.

[0320] 10. The idle UE obtains the timer duration Tx through network broadcast.

[0321] 11. When the Te moment is reached, the idle UE starts Tx. If the transmission of the connection establishment request message is started before Tx times out, T is started. When T times out, the UE sends a connection establishment request message.

[0322] Embodiment 1:

[0323] 1. The UE obtains the indication information of the target base station through system broadcast, such as the target gNB identifier, the scheduled connection time Te and the reference connection waiting time, such as the maximum waiting time T0.

[0324] 2. The UE obtains the correspondence between the connection waiting duration scaling factor and the service characteristic parameter PDB through system broadcast: Let the sequence of PDB be PDBminreference = {PDBminreference_1, …, PDUminreference_n, …, PDBminreference_N}, where 0 < PDBminreference_1 < … < PDBminreference_n < … < PDBminreference_N. And obtain the connection waiting duration scaling factor corresponding to each PDB, and denote the sequence composed of the connection waiting duration scaling factors as P = {P_1, …, P_N}, where 0 < P_1 < … < P_n < … < P_N < 1.

[0325] 3. The UE obtains the minimum value PDBmin of the PDBs corresponding to all the uplink and downlink QoS flows (Flows) of the ongoing service according to the 5QI of all the uplink and downlink QoS flows (Flows) of the ongoing service and obtains the corresponding PDB.

[0326] 4. Determine T based on the minimum value PDBmin:

[0327] 4.1. If 0 ≤ PDBmin ≤ PDBminreference_1, the UE generates a random number rand, which is uniformly distributed between [0, P_1], then the T duration corresponding to this UE is: rand * T0.

[0328] 4.2. If PDBminreference_n - 1 < PDBmin ≤ PDBminreference_n, the UE generates a random number rand, which is uniformly distributed in the range (P_n - 1, P_n], then the T duration corresponding to this UE is: rand * T0.

[0329] 4.3. If PDBmin > PDUminreference_N, the UE generates a random number rand, which is uniformly distributed in the range (P_n, 1], then the T duration corresponding to this UE is: rand * T0.

[0330] 5. If the network broadcasts an indication for this connected UE to perform a handover, the UE finds the corresponding configuration in the CHO according to the gNB identifier broadcast by the network, and then triggers the handover.

[0331] 6. When reaching the Te moment,

[0332] 6.1. Start T. When T times out, trigger the UE to synchronize with the target cell, initiate random access, RRC reconfiguration and other handover processes.

[0333] Or,

[0334] 6.2. The UE synchronizes with the target cell and starts T. When T times out, initiate handover procedures such as random access and RRC reconfiguration.

[0335] Embodiment 2:

[0336] 1. The UE obtains the indication information of the target base station through system broadcast, such as the target gNB identifier, the scheduled connection time Te, and the reference connection waiting duration, such as the maximum waiting duration T0.

[0337] 2. The UE obtains the corresponding relationship between the connection waiting duration scaling factor and the service characteristic parameter Access Identity through system broadcast. When Access Identity = 1, the connection waiting duration scaling factor ∈ [Pl_1, Pu_1], where 0 ≤ Pl_1 ≤ Pu_1 ≤ 1. When Access Identity = 2, the connection waiting duration scaling factor ∈ [Pl_2, Pu_2], where 0 ≤ Pl_2 ≤ Pu_2 ≤ 1. When Access Identity = 11, 12, …, etc., the setting is the same as above.

[0338] 3. If there are two Access Identities in the UE, which are 1 and 2 respectively, and Pl_1 > Pl_2 and Pu_1 > Pu_2, then Pl_new = Pl_2 and Pu_new = Pu_2, that is, the range of the connection waiting duration scaling factor corresponding to this UE is [Pl_2, Pu_2].

[0339] 4. The UE generates a random number rand, which is uniformly distributed between [Pl_2, Pu_2], then the T duration corresponding to this UE is: rand * T0.

[0340] 5. If the network indicates through broadcast that this connected UE adopts handover, the UE finds the corresponding configuration in the CHO according to the gNB identifier broadcast by the network, and then triggers handover.

[0341] 6. When the Te moment arrives,

[0342] 6.1. Start T. When T times out, trigger the UE to synchronize with the target cell and initiate handover procedures such as random access and RRC reconfiguration.

[0343] Or,

[0344] 6.2. The UE synchronizes with the target cell and starts T. When T times out, initiate handover procedures such as random access and RRC reconfiguration.

[0345] The embodiment of the present invention also provides a connection establishment device, which is applied to the UE, such as Figure 8As shown, the connection establishment device 1000 includes: a first determination module 1010 and a first connection module 1020, where,

[0346] The first determination module 1010 is configured to determine the connection waiting duration for the UE to connect to the target base station based on the reference connection waiting duration and the connection waiting duration scaling factor associated with the UE.

[0347] The first connection module 1020 is configured to connect to the target base station based on the connection waiting duration after a predetermined connection time.

[0348] In one embodiment, the device 1000 further includes:

[0349] A second determination module 1030, configured to determine the connection waiting duration scaling factor corresponding to the service characteristic parameter associated with the UE according to the correspondence between the service characteristic parameter and the connection waiting duration scaling factor range.

[0350] In one embodiment, the correspondence between the service characteristic parameter and the connection waiting duration scaling factor range includes:

[0351] The correspondence between the service characteristic parameter range and the connection waiting duration scaling factor range.

[0352] In one embodiment, the second determination module 1030 includes:

[0353] A first determination sub-module 1031, configured to determine the connection waiting duration scaling factor from within the connection waiting duration scaling factor range corresponding to the service characteristic parameter range to which the service characteristic parameter associated with the UE belongs.

[0354] In one embodiment, the second determination module 1030 includes:

[0355] A second determination sub-module 1032, configured to randomly select the connection waiting duration scaling factor from within the connection waiting duration scaling factor range corresponding to the service characteristic parameter associated with the UE.

[0356] In one embodiment, the service characteristic parameter includes: access identifier Access Identity, and / or access type Access Category, and / or fifth-generation service quality identifier 5QI parameter, and / or service quality QoS characteristic parameter.

[0357] In one embodiment, the device 1000 further includes at least one of the following:

[0358] The first receiving module 1040 is configured to receive indication information sent by the serving base station indicating the corresponding relationship;

[0359] The third determining module 1050 is configured to determine the corresponding relationship based on the agreement of the communication protocol.

[0360] In one embodiment, the second determining module 1030 includes:

[0361] The third determining sub-module 1033 is configured to, in response to at least two of the service characteristic parameters associated with the UE, determine the connection waiting duration scaling factor within the connection waiting duration scaling factor range with a smaller connection waiting duration scaling factor among at least two connection waiting duration scaling factor ranges respectively corresponding to the at least two service characteristic parameters associated with the UE.

[0362] In one embodiment, the first determining module 1010 includes:

[0363] The fourth determining sub-module 1011 is configured to determine the product of the reference connection waiting duration and the connection waiting duration scaling factor as the connection waiting duration of the UE.

[0364] In one embodiment, the apparatus 1000 further includes:

[0365] The selection module 1060 is configured to randomly select the connection waiting duration scaling factor, where the connection waiting duration scaling factor does not exceed a preset duration scaling factor range.

[0366] In one embodiment, in response to the reference connection waiting duration being the maximum value of the connection waiting duration, the range of the connection waiting duration scaling factor does not exceed 0 to 1.

[0367] In one embodiment, the apparatus 1000 further includes at least one of the following:

[0368] The second receiving module 1070 is configured to receive indication information sent by the serving base station indicating the target base station;

[0369] The third receiving module 1080 is configured to receive indication information sent by the serving base station indicating the reference connection waiting duration;

[0370] The fourth receiving module 1090 is configured to receive indication information sent by the serving base station indicating the predetermined connection moment.

[0371] In one embodiment, the first connection module 1020 includes at least one of the following:

[0372] The first connection sub-module 1021 is configured to connect to the target base station after a connection waiting duration from the predetermined connection moment in response to the UE being in the connected state.

[0373] The second connection sub-module 1022 is configured to connect to the target base station after a connection waiting duration from the moment of triggering connection within the trigger connection time interval after the predetermined connection moment in response to the UE being in the idle state or the inactive state and triggering connection.

[0374] In one embodiment, the apparatus 1000 further includes:

[0375] The synchronization module 1100 is configured to synchronize with the target base station at the predetermined connection moment in response to the UE being in the connected state.

[0376] In one embodiment, the first connection sub-module 1021 includes:

[0377] The connection unit 10211 is configured to switch to the target base station or initiate a reconstruction to the target base station after a connection waiting duration from the predetermined connection moment in response to the UE being in the connected state.

[0378] In one embodiment, the apparatus 1000 further includes:

[0379] The fifth receiving module 1110 is configured to receive indication information for switching or indication information for reconstruction sent by the serving base station.

[0380] The connection unit 10211 includes:

[0381] The first connection sub-unit 102111 is configured to switch to the target base station in response to receiving indication information for switching.

[0382] The second connection sub-unit 102112 is configured to initiate a reconstruction to the target base station in response to receiving indication information for reconstruction.

[0383] In one embodiment, the apparatus 1000 further includes at least one of the following:

[0384] The sixth receiving module 1120 is configured to receive indication information indicating the trigger connection time interval sent by the serving base station.

[0385] The fourth determination module 1130 is configured to determine the trigger connection time interval based on the agreement of the communication protocol.

[0386] In one embodiment, the apparatus 1000 further includes:

[0387] The first connection module 1140 is configured to connect to the target base station after triggering a connection in response to the UE being in the idle state or the inactive state and outside the trigger connection time interval after the predetermined connection time.

[0388] An embodiment of the present invention also provides a connection establishment device, which is applied to a base station, as Figure 9 shown, the connection establishment device 200 includes: a first sending module 210, where

[0389] The first sending module 210 is configured to send indication information indicating a target base station, and / or indication information indicating a reference connection waiting duration, and / or indication information indicating a predetermined connection time to a user equipment UE;

[0390] Wherein, the reference connection waiting duration is used for the UE to determine the connection waiting duration for connecting to the target base station after the predetermined connection time in combination with a connection waiting duration scaling factor.

[0391] In one embodiment, the device 200 further includes:

[0392] A second sending module 220 is configured to send indication information indicating the correspondence between service characteristic parameters and a range of connection waiting duration scaling factors, where the correspondence is used for the UE to determine the connection waiting duration scaling factor.

[0393] In one embodiment, the correspondence between the service characteristic parameters and the range of connection waiting duration scaling factors includes:

[0394] The correspondence between the service characteristic parameter range and the range of connection waiting duration scaling factors.

[0395] In one embodiment, the device 200 further includes:

[0396] A third sending module 230 is configured to send indication information indicating a handover or an indication information indicating a reconstruction to the UE.

[0397] In one embodiment, the device 200 further includes:

[0398] A fourth sending module 240 is configured to send indication information indicating a trigger connection time interval.

[0399] In an exemplary embodiment, the first determination module 1010, the first connection module 1020, the second determination module 1030, the first receiving module 1040, the third determination module 1050, the selection module 1060, the second receiving module 1070, the third receiving module 1080, the fourth receiving module 1090, the synchronization module 1100, the fifth receiving module 1110, the sixth receiving module 1120, the fourth determination module 1130, the first connection module 1140, the first transmitting module 210, the second transmitting module 220, the third transmitting module 230, and the fourth transmitting module 240, etc. can be implemented by one or more central processing units (CPUs, Central Processing Unit), graphics processing units (GPUs, Graphics Processing Unit), baseband processors (BP, baseband processor), application specific integrated circuits (ASICs, Application Specific Integrated Circuit), DSPs, programmable logic devices (PLDs, Programmable Logic Device), complex programmable logic devices (CPLDs, Complex Programmable Logic Device), field-programmable gate arrays (FPGAs, Field-Programmable Gate Array), general-purpose processors, controllers, microcontroller units (MCUs, Micro Controller Unit), microprocessors (Microprocessor), or other electronic components, and are used to execute the foregoing method.

[0400] Figure 10 FIG. 4 is a block diagram of a device 3000 for connection establishment according to an exemplary embodiment. For example, the device 3000 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0401] Referring to Figure 10 , the device 3000 may include one or more of the following components: a processing component 3002, a memory 3004, a power component 3006, a multimedia component 3008, an audio component 3010, an input / output (I / O) interface 3012, a sensor component 3014, and a communication component 3016.

[0402] The processing component 3002 generally controls the overall operation of the device 3000, such as operations associated with display, telephone calls, data communication, camera operations, and recording operations. The processing component 3002 may include one or more processors 3020 to execute instructions to complete all or part of the steps of the above methods. In addition, the processing component 3002 may include one or more modules to facilitate the interaction between the processing component 3002 and other components. For example, the processing component 3002 may include a multimedia module to facilitate the interaction between the multimedia component 3008 and the processing component 3002.

[0403] The memory 3004 is configured to store various types of data to support the operation of the device 3000. Examples of such data include instructions for any application or method operating on the device 3000, contact data, phone book data, messages, pictures, videos, etc. The memory 3004 may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk, or optical disk.

[0404] The power component 3006 provides power to various components of the device 3000. The power component 3006 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 3000.

[0405] The multimedia component 3008 includes a screen that provides an output interface between the device 3000 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors can not only sense the boundaries of touch or swipe actions but also detect the duration and pressure associated with the touch or swipe operations. In some embodiments, the multimedia component 3008 includes a front camera and / or a rear camera. When the device 3000 is in an operation mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each of the front camera and the rear camera may be a fixed optical lens system or have a focal length and optical zoom capabilities.

[0406] The audio component 3010 is configured to output and / or input audio signals. For example, the audio component 3010 includes a microphone (MIC), which is configured to receive external audio signals when the device 3000 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals can be further stored in the memory 3004 or transmitted via the communication component 3016. In some embodiments, the audio component 3010 further includes a speaker for outputting audio signals.

[0407] The I / O interface 3012 provides an interface between the processing component 3002 and a peripheral interface module, which may be a keyboard, a click wheel, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

[0408] The sensor component 3014 includes one or more sensors for providing an assessment of various aspects of the state of the device 3000. For example, the sensor component 3014 can detect the on / off state of the device 3000, the relative positioning of components, such as the display and keypad of the device 3000. The sensor component 3014 can also detect a change in the position of the device 3000 or a component of the device 3000, the presence or absence of user contact with the device 3000, the orientation or acceleration / deceleration of the device 3000, and a change in the temperature of the device 3000. The sensor component 3014 can include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor component 3014 can also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor component 3014 can further include an acceleration sensor, a gyro sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0409] The communication component 3016 is configured to facilitate communication between the device 3000 and other devices in a wired or wireless manner. The device 3000 can access a wireless network based on communication standards, such as Wi-Fi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 3016 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 3016 further includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0410] In an exemplary embodiment, the apparatus 3000 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the above method.

[0411] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as the memory 3004 including instructions, and the above instructions can be executed by the processor 3020 of the apparatus 3000 to complete the above method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0412] Those skilled in the art will readily conceive of other embodiments of the present invention's embodiments after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the embodiments of the present invention, which follow the general principles of the embodiments of the present invention and include known common knowledge or conventional technical means in the technical field not disclosed in the embodiments of the present disclosure. The specification and embodiments are only to be regarded as exemplary, and the true scope and spirit of the embodiments of the present invention are pointed out by the following claims.

[0413] It should be understood that the embodiments of the present invention are not limited to the exact structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the embodiments of the present invention is only limited by the appended claims.

Claims

1. A connection establishment method, wherein, Performed by a user equipment UE, the method includes: Receiving indication information sent by a non-terrestrial network NTN serving base station; the indication information is used to indicate a reference connection waiting duration and a predetermined connection moment, the indication information is used for time-triggered conditional handover CHO; the predetermined connection moment is used to trigger the CHO; the UE is in a radio resource control RRC connected state; After the predetermined connection moment, connecting to a target base station based on the connection waiting duration, where the connection waiting duration is the product of the reference connection waiting duration and a coefficient corresponding to a service characteristic parameter associated with the UE; Wherein, the method further includes: After the predetermined connection moment, synchronizing with the target base station within the connection waiting duration.

2. The method according to claim 1, wherein The connecting to a target base station based on the connection waiting duration after the predetermined connection moment includes: The UE is in a connected state and connects to the target base station after the predetermined connection moment at an interval of the connection waiting duration.

3. The method according to claim 2, wherein The UE is in a connected state and connects to the target base station after the predetermined connection moment at an interval of the connection waiting duration, including: The UE is in a connected state and switches to the target base station after the predetermined connection moment at an interval of the connection waiting duration.

4. The method according to claim 3, wherein The method further includes: receiving indication information for handover or re-establishment sent by the serving base station; The UE is in a connected state and switches to the target base station after the predetermined connection moment at an interval of the connection waiting duration, including: Receiving indication information for handover and the UE is in a connected state, and switching to the target base station after the predetermined connection moment at an interval of the connection waiting duration.

5. The method according to any one of claims 1 to 4, wherein The receiving indication information sent by a non-terrestrial network NTN serving base station includes: Receiving the indication information broadcast by the serving base station.

6. A connection establishment method, wherein, Performed by a non-terrestrial network NTN serving base station, the method includes: Sending indication information to a user equipment UE, the indication information is used to indicate a reference connection waiting duration and a predetermined connection moment, the indication information is used for time-triggered conditional handover CHO; the predetermined connection moment is used to trigger the CHO; the product of the reference connection waiting duration and a coefficient corresponding to a service characteristic parameter associated with the UE is used for the UE to determine the connection waiting duration; after the predetermined connection moment, the connection waiting duration is used for the UE to connect to a target base station; the UE is in a radio resource control RRC connected state and, after the predetermined connection moment, synchronizes with the target base station within the connection waiting duration.

7. The method according to claim 6, wherein The method further includes: Sending indication information for handover to the UE.

8. The method according to claim 6 or 7, wherein The sending indication information to a user equipment UE includes: Sending the indication information to the user equipment UE by broadcast.

9. A connection establishment device, wherein, Applied to a user equipment UE, the apparatus includes: A receiving module, configured to receive indication information sent by a non-terrestrial network (NTN) service base station; the indication information is used to indicate a reference connection waiting duration and a predetermined connection time, the indication information is used for time-triggered conditional handover (CHO); the predetermined connection time is used to trigger the CHO; the UE is in a radio resource control (RRC) connected state; A first connection module, configured to connect to a target base station based on a connection waiting duration after the predetermined connection time, where the connection waiting duration is a product of the reference connection waiting duration and a coefficient corresponding to a service characteristic parameter associated with the UE; The apparatus further includes: A synchronization module, configured to synchronize with the target base station within the connection waiting duration after the predetermined connection time.

10. A connection establishment device, wherein, Applied to a base station, the apparatus includes: A sending module, configured to send indication information to a user equipment (UE), the indication information is used to indicate a reference connection waiting duration and a predetermined connection time, the indication information is used for time-triggered conditional handover (CHO); the predetermined connection time is used to trigger the CHO; a product of the reference connection waiting duration and a coefficient corresponding to a service characteristic parameter associated with the UE is used for the UE to determine the connection waiting duration; after the predetermined connection time, the connection waiting duration is used for the UE to connect to a target base station; the UE is in a radio resource control (RRC) connected state and synchronizes with the target base station within the connection waiting duration after the predetermined connection time.

11. A communication device, comprising a processor, a memory, and an executable program stored on the memory and capable of being run by the processor, wherein, When the processor runs the executable program, it executes the steps of the connection establishment method according to any one of claims 1 to 5 or 6 to 8.

12. A storage medium, the storage medium stores computer-executable instructions, and after being executed by a processor, the computer-executable instructions can implement the steps of the connection establishment method according to any one of claims 1 to 5 or 6 to 8.

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