Communication connection method and system

Abstract

The embodiments of this specification provide a communication connection method and system, wherein the method includes: obtaining target location information corresponding to a user terminal at a target location, wherein the target location is at the regional boundary of a signal coverage area of ​​a first communication satellite; determining target communication parameters corresponding to the user terminal according to the target location information by interacting with a second communication satellite, wherein the second communication satellite is a neighboring satellite of the first communication satellite; sending the target communication parameters to the user terminal, so that the user terminal can communicate and connect with the second communication satellite according to the target communication parameters when the user terminal moves to the signal coverage area of ​​the second communication satellite. This enables the user terminal to smoothly switch from the communication service provided by the first communication satellite to the communication service provided by the second communication satellite, avoids communication interruption caused by the user terminal leaving the signal coverage area of ​​the first communication satellite, and ensures the normal operation of the communication service of the user terminal.

Description

Technical Field

[0001] The embodiments of the present specification relate to the field of wireless communication technology, and in particular, to a communication connection method. Background Art

[0002] In the NTN (Non Terrestrial Network) system, satellite communication is generally used to provide communication services to user terminals. Compared with the traditional ground network system, this non-terrestrial communication network system can increase the signal coverage. However, when the user terminal communicates with the communication satellite, since the communication satellite will move along the orbit, this will cause the user terminal to leave the signal coverage of the communication satellite, resulting in interruption of communication between the user terminal and the communication satellite, affecting the communication service of the user terminal. Based on this, an effective technical solution is urgently needed to solve the above problems. Summary of the invention

[0003] In view of this, an embodiment of this specification provides a communication connection method. One or more embodiments of this specification also relate to a communication connection system, a computing device, a computer-readable storage medium and a computer program to solve the technical defects existing in the prior art.

[0004] According to a first aspect of an embodiment of this specification, a communication connection method is provided, which is applied to a first communication satellite, and includes:

[0005] Acquire target location information corresponding to a user terminal at a target location, wherein the target location is at a region boundary of a signal coverage area of ​​a first communication satellite;

[0006] Determining a target communication parameter corresponding to the user terminal according to the target position information by interacting with a second communication satellite, wherein the second communication satellite is a neighboring satellite of the first communication satellite;

[0007] The target communication parameters are sent to the user terminal so that the user terminal can be connected to the second communication satellite in communication according to the target communication parameters when the user terminal moves to a signal coverage area of ​​the second communication satellite.

[0008] According to a second aspect of the embodiments of this specification, a communication connection system is provided, including a user terminal and a first communication satellite, wherein:

[0009] The user terminal is configured to send target location information of the target location to the first communication satellite when it is determined that the target location has been reached, wherein the target location is at a regional boundary of a signal coverage area of ​​the first communication satellite;

[0010] The first communication satellite is configured to determine a target communication parameter corresponding to the user terminal according to the target position information in an interactive manner with a second communication satellite, and send the target communication parameter to the user terminal, so that the user terminal is connected to the second communication satellite for communication according to the target communication parameter, wherein the second communication satellite is a neighboring satellite of the first communication satellite;

[0011] The user terminal is further configured to, when it is determined that the user terminal has moved into a signal coverage area of ​​the second communication satellite, establish a communication connection with the second communication satellite according to the target communication parameters.

[0012] According to a third aspect of an embodiment of this specification, a computing device is provided, including:

[0013] Memory and processor;

[0014] The memory is used to store computer executable instructions, and the processor is used to execute the computer executable instructions. When the computer executable instructions are executed by the processor, the steps of the above-mentioned communication connection method are implemented.

[0015] According to a fourth aspect of the embodiments of this specification, a computer-readable storage medium is provided, which stores computer-executable instructions, and when the instructions are executed by a processor, the steps of the above-mentioned communication connection method are implemented.

[0016] According to a fifth aspect of the embodiments of this specification, a computer program is provided, wherein when the computer program is executed in a computer, the computer is caused to execute the steps of the above-mentioned communication connection method.

[0017] An embodiment of the present specification provides a communication connection method, which is applied to a first communication satellite, to obtain target location information corresponding to a user terminal at a target location, wherein the target location is at a regional boundary of a signal coverage area of ​​the first communication satellite; to determine target communication parameters corresponding to the user terminal according to the target location information in an interactive manner with a second communication satellite, wherein the second communication satellite is a neighboring satellite of the first communication satellite; and to send the target communication parameters to the user terminal so that the user terminal can communicate with the second communication satellite according to the target communication parameters when the user terminal moves to the signal coverage area of ​​the second communication satellite.

[0018] The above method can obtain the current target position information of the user terminal when the user terminal is at the regional boundary of the signal coverage area of ​​the first communication satellite, which indicates that the user terminal may be about to leave the signal coverage area of ​​the first communication satellite, and adopts a method of interacting with the neighboring satellite of the first communication satellite (that is, the second communication satellite) to determine the target communication parameters corresponding to the user terminal according to the target position information, and send the target communication parameters to the user terminal, so that the user terminal can communicate with the second communication satellite according to the target communication parameters, so that the user terminal can smoothly switch from the communication service provided by the first communication satellite to the communication service provided by the second communication satellite, thereby avoiding communication interruption caused by the user terminal leaving the signal coverage area of ​​the first communication satellite, and ensuring the normal operation of the communication service of the user terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of an application scenario of a communication connection method provided by an embodiment of this specification;

[0020] Figure 2 is a flow chart of a communication connection method provided by an embodiment of this specification;

[0021] Figure 3 It is a schematic diagram of a regional boundary in a communication connection method provided by an embodiment of this specification;

[0022] Figure 4 It is a schematic diagram of a communication satellite in a communication connection method provided by an embodiment of the present specification;

[0023] Figure 5 It is a schematic diagram of communication parameter configuration in a communication connection method provided by an embodiment of this specification;

[0024] Figure 6 It is a schematic diagram of SSB information in a communication connection method provided by an embodiment of this specification;

[0025] Figure 7 It is a schematic diagram of receiving SSB in a communication connection method provided by an embodiment of this specification;

[0026] Figure 8 is a process flow chart of a communication connection method provided by an embodiment of this specification;

[0027] Fig. 9 It is a structural diagram of a communication connection system provided by an embodiment of this specification;

[0028] Fig.10 It is a structural block diagram of a computing device provided by an embodiment of this specification. DETAILED DESCRIPTION

[0029] Many specific details are described in the following description to facilitate a full understanding of this specification. However, this specification can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of this specification, so this specification is not limited to the specific implementation disclosed below.

[0030] The terms used in one or more embodiments of this specification are only for the purpose of describing specific embodiments, and are not intended to limit one or more embodiments of this specification. The singular forms of "a", "said" and "the" used in one or more embodiments of this specification and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in one or more embodiments of this specification refers to and includes any or all possible combinations of one or more associated listed items.

[0031] It should be understood that although the terms first, second, etc. may be used to describe various information in one or more embodiments of this specification, this 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 one or more embodiments of this specification, the first may also be referred to as the second, and similarly, the second may also be referred to as the first. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0032] In addition, it should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in one or more embodiments of this specification are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions, and provide corresponding operation entrances for users to choose to authorize or refuse.

[0033] First, the terms involved in one or more embodiments of this specification are explained.

[0034] Reconfiguration: Re-adjust the allocation of wireless resources.

[0035] SSB: Synchronization Signal Block, synchronization information block.

[0036] SMTC: SSB Measurement Timing Configuration, SSB time timing configuration.

[0037] UE: User Equipment, user terminal.

[0038] gNB: the next Generation NodeB, next generation base station.

[0039] PSS: Primary Synchronisation Signal, primary synchronization signal.

[0040] SSS: Secondary Synchronisation Signal, auxiliary synchronization signal.

[0041] PBCH: Physical Broadcast Channel, physical broadcast channel.

[0042] MIB: Master Information Block.

[0043] PLMN: Public Land Mobile Network. It consists of MCC (Mobile Country Code) and MNC (Mobile Network Code). It is a network established and operated by a regulatory agency or an operator approved by the regulatory agency to provide land mobile communication services to the public. It is used to indicate which country and which operator the current network belongs to.

[0044] OFDM: Orthogonal Frequency Division Multiplexing. It is a multi-carrier modulation technology. The core idea is to divide the channel into several orthogonal sub-channels, convert the high-speed data signal into parallel low-speed sub-data streams, and modulate them to transmit on each sub-channel. The orthogonal signals can be separated by using correlation technology at the receiving end, which can reduce the mutual interference between sub-channels.

[0045] PRB: Physical resource block, physical resource block.

[0046] In this specification, a communication connection method is provided. This specification also relates to a communication connection system, a computing device, and a computer-readable storage medium, which are described in detail one by one in the following embodiments.

[0047] See also Figure 1 , Figure 1 A schematic diagram of an application scenario of a communication connection method provided according to an embodiment of the present specification is shown.

[0048] Figure 1 The diagram includes a user terminal 102, a first communication satellite 104 and a second communication satellite 106.

[0049] like Figure 1 As shown in , the user terminal 102 is in the signal coverage area of ​​the first communication satellite 104, and the first communication satellite 104 provides communication services to the user terminal 102. As the first communication satellite 104 operates, the user terminal 102 reaches the regional boundary of the signal coverage area of ​​the first communication satellite 104. At this time, the user terminal 102 can report the target position information of the user terminal 102 at this time to the first communication satellite based on the position measurement configuration information configured by the first communication satellite 104. The first communication satellite 104 can determine the target communication parameters corresponding to the user terminal 102 according to the target position information by exchanging a communication parameter set or a target communication parameter corresponding to the target position information with the second communication satellite 106, and send the target communication parameters to the user terminal 102, so that the user terminal 102 establishes a communication connection with the second communication satellite 106 according to the target communication parameters. Thereby, the switching of the communication satellite is realized, and the communication service is ensured to be uninterrupted.

[0050] See also Figure 2 , Figure 2 A flow chart of a communication connection method provided according to an embodiment of the present specification is shown, which specifically includes the following steps.

[0051] Step 202: Acquire target location information corresponding to a user terminal at a target location, wherein the target location is at a boundary of a signal coverage area of ​​a first communication satellite.

[0052] Specifically, the communication connection method provided in the embodiments of this specification can be applied to the field of satellite communication. A communication satellite can be deployed with a communication base station, which provides communication services for all user terminals within the signal coverage area of ​​the communication satellite. The communication satellite can include the following first communication satellite and second communication satellite.

[0053] Among them, the signal coverage area of ​​the first communication satellite can be understood as the area covered by the beam emitted by the first communication satellite, and the user terminal in the signal coverage area can use the communication service provided by the first communication satellite. It can be understood that the user terminal at the target position can be connected to the first communication satellite for communication at this time, so as to use the communication service provided by the first communication satellite. The target position information can be understood as the position information of the target position where the user terminal is located, such as longitude and latitude information. The regional boundary of the signal coverage area of ​​the first communication satellite can be understood as the edge area position of the signal coverage area of ​​the first communication satellite. It can be understood that the signal coverage area of ​​the first communication satellite is composed of multiple sub-area positions, and the sub-area position at the edge of the multiple sub-area positions is the edge area position, and the edge area position can include one or more sub-area positions. The sub-area position can be determined according to the beam or determined according to artificial division, and the embodiments of this specification do not limit this.

[0054] Based on this, the longitude and latitude information of the user terminal at the boundary of the area covered by the beam emitted by the first communication satellite can be obtained.

[0055] For example, user A is located within the signal coverage area of ​​a first communication satellite, and the first communication satellite can provide communication services for user A. After user A moves, or the first communication satellite moves, when the user terminal of user A determines that it has moved to the area boundary of the signal coverage area of ​​the first communication satellite, it can send the target location information (longitude X, latitude Y) of the target location of the user terminal at this time to the first communication satellite.

[0056] In practical applications, the signal coverage area can be understood as a cell, and the signal coverage area of ​​the first communication satellite can be understood as the cell covered by the first communication satellite. Figure 3 , Figure 3 FIG. 1 shows a schematic diagram of a regional boundary in a communication connection method provided according to an embodiment of the present specification. Figure 3 As shown, in the NTN system, when the user terminal is at the center of the cell (i.e., the signal coverage area), the first communication satellite can be used to provide communication services for the user terminal. When the user terminal is at the edge of the cell, it is necessary to switch the first communication satellite providing communication services for the user terminal to the second communication satellite in advance to ensure the normal operation of the communication service. Among them, beam 302 is used to represent the cell center position beam, beam 304 is used to represent the cell edge position beam, area 306 is used to represent the cell center position, and area 308 is used to represent the cell edge position (i.e., area boundary).

[0057] In a specific implementation, the step of obtaining target location information corresponding to a user terminal at a target location includes:

[0058] Sending location measurement configuration information to the user terminal;

[0059] When the user terminal is at the target location, target location information sent by the user terminal according to the location measurement configuration information is received.

[0060] Among them, the position measurement configuration information can be understood as the position-based measurement configuration configured by the first communication satellite for the user terminal. The position measurement configuration information can be used to enable the user terminal to start position-based measurement, so that the user terminal can detect its own position in real time and report the position information to the first communication satellite.

[0061] Based on this, after the user terminal accesses the first communication satellite, the first communication satellite can configure a location-based measurement configuration for the user terminal, and when the user terminal is at the target location, receive the target location information reported by the user terminal based on the measurement configuration.

[0062] In practical applications, the user terminal can detect the location of the user terminal in real time based on the location-based measurement configuration configured by the first communication satellite. Figure 3 When the user terminal reaches area 308 in the measurement, a measurement report may be reported to the first communication satellite, and the measurement report may carry the geographical location information of the user terminal.

[0063] In summary, by enabling the user terminal to detect the position in real time and report the target position information, it is convenient to subsequently determine the target communication parameters according to the target position information, and further realize the switching between communication satellites.

[0064] Step 204: Determine the target communication parameters corresponding to the user terminal according to the target position information by interacting with a second communication satellite, wherein the second communication satellite is a neighboring satellite of the first communication satellite.

[0065] Specifically, after the target location information corresponding to the user terminal is acquired, the target communication parameters corresponding to the user terminal may be determined according to the target location information by interacting with the second communication satellite.

[0066] Continuing with the above example, after acquiring the target location information (longitude X, latitude Y) of the user terminal, the first communication satellite can determine the SMTC parameters corresponding to the user terminal according to the target location information.

[0067] In practical applications, due to the limited coverage of the communication satellite, in order to achieve regional coverage in the NTN communication system, the maximum number of beams supported can be increased to 256, and different beams can cover different geographical locations. The mobility management, beam switching and downlink synchronization of the user terminal can be achieved through the measurement of the beam. Since the actual geographical location of the user terminal is different, the communication satellite can configure the communication parameters according to the location information of the user terminal.

[0068] See also Figure 4 , Figure 4 FIG. 1 is a schematic diagram of a communication satellite in a communication connection method provided according to an embodiment of the present specification. Figure 4 As shown, the first communication satellite 402 and the second communication satellite 404 are moving along their respective orbits, and the second communication satellite 404 can be understood as a neighboring satellite of the first communication satellite 402. The signal coverage area 406 of the first communication satellite 402 and the signal coverage area 408 of the second communication satellite 404 can overlap. When the first communication satellite 402 moves in the direction of the arrow in the figure, the signal coverage area 406 will also change accordingly. Correspondingly, when the second communication satellite 404 moves in the direction of the arrow in the figure, the signal coverage area 408 will also change. Specifically, the position 410 in the figure is currently in the signal coverage area 406. When the first communication satellite 402 and the second communication satellite 404 move in the direction of the arrow, it can be understood that the position 410 in the figure will leave the signal coverage area 406 and reach the signal coverage area 408 as the two communication satellites move.

[0069] In practical applications, communication parameters can be understood as SMTC parameters, which can be used to measure the interaction information between communication satellites and user terminals. Figure 4 As shown in , the coverage areas of beam 1 and beam 2 are far apart. If the same SMTC parameters are configured in the area where beam 1 and beam 2 are located, the window of the SMTC parameters needs to be able to cover the interactive information sending positions of all beams, which will cause the SMTC parameters configured for the user terminal to be inaccurate. Specifically, for user terminals in an idle state, if the window of the SMTC parameters is too large, the user terminal will not be able to enter a sleep state, increasing the power consumption of the user terminal. For user terminals that are connected too fast, a large SMTC window will waste downlink time and frequency resources, thereby affecting the downlink rate. Based on this, in a communication connection method provided in an embodiment of the present specification, when a communication satellite configures SMTC parameters for a user terminal, the configuration can be made with reference to the geographical location of the user terminal, thereby achieving precise control of the window of the SMTC parameters and increasing the utilization rate of air interface wireless resources.

[0070] In a specific implementation, in one embodiment of the present specification, before the user terminal establishes a connection with the first communication satellite, communication parameter interaction between the first communication satellite and the second communication satellite can be implemented. The specific implementation method is as follows:

[0071] Before acquiring the target location information corresponding to the user terminal at the target location, the method further includes:

[0072] receiving a communication parameter set sent by a second communication satellite, wherein the communication parameter set is composed of communication parameters corresponding to a sub-area position within a signal coverage area of ​​the second communication satellite;

[0073] Correspondingly, determining the target communication parameter corresponding to the user terminal according to the target location information includes:

[0074] According to the target location information, a target communication parameter corresponding to the user terminal is selected from the communication parameter set.

[0075] Among them, the communication parameters corresponding to the sub-region positions within the signal coverage area of ​​the second communication satellite may include configuration of the position information, and the position information of each sub-region position corresponds to a communication parameter. The communication parameters may be understood as SMTC parameters.

[0076] Based on this, before the user terminal accesses the first communication satellite, the second communication satellite can send a communication parameter set to the first communication satellite. After determining the target location information of the user terminal, the first communication satellite can select the target communication parameters corresponding to the user terminal in the communication parameter set according to the target location information.

[0077] Using the above example, the signal coverage area of ​​the second communication satellite may include 5 sub-area locations, then the communication parameter set includes the SMTC parameters corresponding to each of the 5 sub-area locations. The second communication satellite sends the communication parameters to the first communication satellite, and the first communication satellite can select the SMTC parameters configured for the user terminal from the SMTC parameters corresponding to the 5 sub-area locations.

[0078] In practical applications, the communication parameters between the first communication satellite and the second communication satellite can be exchanged through the XN connection port. Figure 5 , Figure 5 FIG. 1 is a schematic diagram showing a communication parameter configuration in a communication connection method provided according to an embodiment of the present specification. Figure 5As shown, the beam coverage area is a cellular network structure. Each communication parameter included in the communication parameter set sent by the second communication satellite to the first communication satellite can select the center point of each beam as the selected geographical location. The second communication satellite can exchange the selected geographical location, the communication parameters of the beam, the PLMN information of the current cell (i.e., the signal coverage area), and the Cell ID (regional unique identifier) ​​as a group of configurations to the first communication satellite. For scenarios where the same geographical location is covered by multiple beams, the same geographical location can be associated with a communication parameter, multiple PLMN information, and multiple Cell IDs as a group of configurations to the first communication satellite. Among them, the first communication satellite can be understood as the opposite base station of the second communication satellite.

[0079] In addition, the beam coverage area may also be a circular network structure, an elliptical network structure, or a distorted elliptical network structure, etc., which is not limited in the embodiments of this specification.

[0080] Combined with the above Figure 3 It can be seen that when the user terminal is at the center of the cell (i.e., at the center of the signal coverage area of ​​the first communication satellite), it is not necessary to measure the communication parameters of the neighboring area (i.e., the signal coverage area of ​​the second communication satellite). When the user terminal reaches the edge of the cell (i.e., the area boundary of the signal coverage area of ​​the first communication satellite), the user terminal needs to start measuring the interaction information of the neighboring area (i.e., SSB information). Therefore, the user terminal needs to determine the time of arrival at the edge of the cell and upload a measurement report.

[0081] In summary, by configuring geographic location information in the communication parameters, it is possible to implement the SMTC parameters between stations based on the geographic location information of the user terminal, and to control the SMTC window parameter configuration based on the geographic location information of the user terminal. In addition, by completing the interaction of the communication parameter set before the user accesses the first communication satellite, the number of interactions between communication satellites is reduced, and the waste of transmission resources of the XN connection port is avoided.

[0082] In a specific implementation, selecting, according to the target location information, the target communication parameter corresponding to the user terminal in the communication parameter set includes:

[0083] Determine a sub-region position corresponding to each communication parameter in the communication parameter set;

[0084] A target sub-area position associated with the user terminal is determined according to the target position information, and a communication parameter corresponding to the target sub-area position is selected from the communication parameter set as a target communication parameter corresponding to the user terminal.

[0085] The target sub-region position may be understood as a sub-region position within the signal coverage of the second communication satellite and which is closest to the target position of the user terminal.

[0086] Based on this, the sub-region position corresponding to each communication parameter in the communication parameter set of the second communication satellite can be determined, and according to the position information of the sub-region position corresponding to each communication parameter and the target position information of the target position where the user terminal is located, the distance between the target position and the sub-region position corresponding to each communication parameter is calculated, and the sub-region position with the smallest distance is determined as the target sub-region position, and the communication parameter corresponding to the target sub-region position is selected from the communication parameter set, and the communication parameter is determined as the target communication parameter corresponding to the user terminal.

[0087] Continuing with the above example, the sub-area position corresponding to each of the five SMTC parameters in the communication parameter set can be determined, and the distances between these five sub-area positions and the target position of the user terminal can be calculated. The SMTC parameter corresponding to the sub-area position with the smallest distance can be determined as the target communication parameter configured for the user terminal.

[0088] In summary, by determining the communication parameters corresponding to the target sub-area position closest to the target position as the target communication parameters, the communication parameter configuration based on the location information of the user terminal is realized, so that different communication parameters are configured for user terminals at different locations, thereby improving the utilization rate of communication resources.

[0089] In another embodiment of the present specification, in addition to the above-mentioned communication parameter set interaction before the user terminal accesses, after determining the target location information of the user terminal, the first communication satellite can obtain the corresponding target communication parameters from the second communication satellite according to the target location information. The specific implementation method is as follows:

[0090] The method of determining the target communication parameter corresponding to the user terminal according to the target location information by interacting with the second communication satellite includes:

[0091] Sending a parameter acquisition request to a second communication satellite, wherein the parameter acquisition request carries the target location information;

[0092] Receive the target communication parameter corresponding to the user terminal selected by the second communication satellite from the communication parameter set corresponding to the second communication satellite according to the target location information.

[0093] Specifically, after obtaining the target location information corresponding to the user terminal, the first communication satellite can send a parameter acquisition request carrying the target location information to the second communication satellite. The second communication satellite receives the parameter acquisition request and can select corresponding target communication parameters from the communication parameter set of the second communication satellite based on the target location information, and send the target communication parameters to the first communication satellite.

[0094] Continuing with the above example, the second communication satellite may not send the communication parameter set to the first communication satellite. Instead, the first communication satellite sends a parameter acquisition request carrying the target location information (longitude X, latitude Y) to the second communication satellite, and the second communication satellite selects the corresponding SMTC parameter in the communication parameter set based on the target location information and sends it to the first communication satellite.

[0095] It can be understood that the interaction between the first communication satellite and the second communication satellite in the embodiments of this specification can be performed through the XN connection port.

[0096] In summary, the method of sending a parameter acquisition request to the second communication satellite to acquire the target communication parameters increases the number of interactions between communication satellites, but reduces the amount of data in each interaction, compared with the above method.

[0097] Step 206: Send the target communication parameters to the user terminal, so that the user terminal can communicate with the second communication satellite according to the target communication parameters when moving to the signal coverage area of ​​the second communication satellite.

[0098] Specifically, after determining the target communication parameters corresponding to the user terminal, the first communication satellite can send the target communication parameters to the user terminal, so that when the user terminal moves into the signal coverage area of ​​the second communication satellite, it can communicate with the second communication satellite according to the target communication parameters.

[0099] After acquiring the target communication parameters, the user terminal can also monitor the interaction information between the user terminal and the second communication satellite according to the measurement period, measurement offset and measurement window included in the target communication parameters to obtain monitoring results, wherein the monitoring results are used to enable the user terminal to use the communication services provided by the second communication satellite.

[0100] The interactive information between the user terminal and the second communication satellite can be understood as the SMTC configuration. The period and offset in the SMTC configuration can be used to indicate the window in which the second communication satellite may send SSB information. In practical applications, when the base station sends information to the user terminal via the second communication satellite, it usually does not include the specific sending position of the SSB, but only includes the SMTC window. The SMTC window needs to be used to frame the sending time position of all SSBs. Figure 6 , Figure 6 FIG. 1 is a schematic diagram showing SSB information in a communication connection method provided according to an embodiment of the present specification. Figure 6 As shown in FIG. 1 , SSB information may include PSS, SSS and PBCH, which occupy 4 OFDM symbols in the time domain and 20 PRBs in the frequency domain. SSB information is sent by the base station deployed in the communication satellite and received by the user terminal. The user terminal can achieve downlink synchronization and receive the system master information block MIB by reading the SSB. The transmission period of SSB and the symbol position of the transmission are related to the pattern of SSB. Figure 7 , Figure 7 FIG. 1 shows a schematic diagram of receiving SSB in a communication connection method provided according to an embodiment of the present specification. Figure 7 As shown in Figure 2, within 20ms, the communication satellite can select any position in a given SSB transmission position to transmit SSB, such as Figure 7The communication satellite shown in can send 8 SSBs. The SMTC parameter can be understood as the window for SSB reception. The measurement window included in the SMTC parameter needs to cover the SSB sent by the first communication satellite and the SSB sent by the second communication satellite. Since the starting position and number of SSBs sent by each communication satellite are different, it is necessary to adjust the SMTC parameters corresponding to different location information according to the location information of the user terminal. Specifically, in order to realize functions such as mobility control and beam management, the user terminal needs to monitor the SSB information of the cell (i.e., the signal coverage area of ​​the first communication satellite) and the SSB information of the neighboring cell (i.e., the signal coverage area of ​​the second communication satellite) in real time. Among them, mobility control can be understood as switching between cells within the same base station and switching between cells under different base stations, so as to achieve continuity of service coverage. In the NR system, a cell can send multiple beams, which can cover different directions and ranges. Beam management can be understood as switching between different beams in the cell. For example, due to the movement of the user terminal, the user terminal will switch from the coverage range of one beam to the coverage range of another beam. Therefore, the base station needs to implement beam switching and management of the user terminal. In order to enable the user terminal to accurately know the sending location of SSB, the base station needs to configure the SSB timing configuration (i.e., SMTC parameters) to the user terminal. The specific configuration parameters include the measurement period, offset, and window size of SMTC monitoring. The configuration requires that the SMTC window size at least includes the SSB of the current cell and the neighboring cells. If the window configuration of the SMTC parameter is too large, it will affect the downlink rate of the user terminal. Therefore, when selecting the window of the SMTC parameter, try to configure a small window while meeting the measurement requirements.

[0101] Based on this, the user terminal can monitor the SSB information sent by the second communication satellite according to the measurement period, measurement offset and measurement window included in the received target communication parameters (i.e., SMTC parameters), and obtain a monitoring result, which can be used to enable the user terminal to use the communication service provided by the second communication satellite. In addition, the user terminal can also monitor the SSB information sent by the neighboring satellite of the second communication satellite according to the measurement period, measurement offset and measurement window included in the received target communication parameters.

[0102] In practical applications, in the NTN system, the signal propagation delay between the user terminal and the communication satellite is large, and due to the large coverage of the communication satellite, the signal propagation delay between the user terminal and different communication satellites also varies greatly. In the NTN system, in order for the user terminal to receive the interaction information (SSB information) from different communication satellites in the SMTC window, it is necessary to extend the duration of the SMTC parameter to compensate for the difference between the user terminal and different communication satellites. The extension of the SMTC window means that the UE must continue to receive the interaction information in a longer SMTC window, which increases the energy consumption of the user terminal. In addition, the extension of the measurement window means that the communication time between the user terminal and the communication satellite is reduced, affecting the user experience.

[0103] Based on this, in order to more accurately configure the communication parameters of the second communication satellite for the user terminal, the target communication parameters determined according to the target position information can be further adjusted according to the transmission delay difference. The specific implementation method is as follows:

[0104] After determining the target communication parameter corresponding to the user terminal, the method further includes:

[0105] receiving a transmission delay difference sent by the user terminal, wherein the transmission delay difference is a difference between a first transmission delay and a second transmission delay, the first transmission delay is a transmission delay between the user terminal and the first communication satellite, and the second transmission delay is a transmission delay between the user terminal and the second communication satellite;

[0106] Adjusting the target communication parameters according to the transmission delay difference;

[0107] Accordingly, the sending of the target communication parameters to the user terminal so that the user terminal is connected to the second communication satellite in communication according to the target communication parameters when the user terminal moves to the signal coverage area of ​​the second communication satellite, includes:

[0108] The adjusted target communication parameters are sent to the user terminal, so that the user terminal can be connected to the second communication satellite in communication according to the adjusted target communication parameters when moving to the signal coverage area of ​​the second communication satellite.

[0109] Specifically, the first communication satellite can adjust the target communication parameters according to the transmission delay difference sent by the user terminal, and send the adjusted target communication parameters to the user terminal, so that the user terminal can communicate with the second communication satellite according to the adjusted target communication parameters.

[0110] For example, the transmission delay between the user terminal and the first communication satellite may be 5ms, and the transmission delay between the user terminal and the second communication satellite may be 4ms, then the transmission delay difference is 1ms. The first communication satellite can adjust the window size of the target communication parameter according to the transmission delay difference of 1ms.

[0111] In summary, by adjusting the target communication parameters according to the transmission delay difference, the transmission delay difference can be compensated, thereby ensuring that the communication service is not interrupted when the communication satellite is switched.

[0112] In a specific implementation, the first transmission delay is calculated by the user terminal according to the first ephemeris information of the first communication satellite and the target position information corresponding to the user terminal;

[0113] Correspondingly, after acquiring the target location information corresponding to the user terminal at the target location, the method further includes:

[0114] Sending second ephemeris information of the second communication satellite to the user terminal so that the user terminal calculates the second transmission delay according to the target position information and the second ephemeris information.

[0115] The first ephemeris information of the first communication satellite includes but is not limited to information such as the orbit and speed of the first communication satellite, and the operating position of the first communication satellite at different times can be determined based on the first ephemeris information. Correspondingly, the second ephemeris information of the second communication satellite includes but is not limited to information such as the orbit and speed of the second communication satellite, and the operating position of the first communication satellite at different times can be determined based on the second ephemeris information.

[0116] Based on this, the user terminal can determine the operating position of the first communication satellite at the current moment according to the first ephemeris information of the first communication satellite, and calculate the first transmission delay according to the operating position and the target position information where the user terminal is currently located. In addition, since the user terminal is not in communication connection with the second communication satellite at this time, the first communication satellite can determine its neighboring second communication satellite and send the second ephemeris information of the second communication satellite to the user terminal. The user terminal can determine the operating position of the second communication satellite at the current moment according to the second ephemeris information, and thus calculate the second transmission delay according to the operating position and the target position information where the user terminal is currently located.

[0117] In practical applications, the first communication satellite can enable the user terminal to report the transmission delay difference through reconfiguration. Moreover, after the user terminal reports the transmission delay difference to the first communication satellite, the first communication satellite can configure the SMTC parameters of the neighboring area (i.e., the adjusted target communication parameters) for the user terminal in combination with the SMTC configuration of the neighboring area and the transmission delay difference.

[0118] In a specific implementation, the user terminal can calculate the current first distance between the user terminal and the first communication satellite according to the current operating position of the first communication satellite and the target position information at which the user terminal is currently located, and determine the ratio of the first distance to the speed of light as the first transmission delay. Correspondingly, the user terminal can calculate the current second distance between the user terminal and the second communication satellite according to the current operating position of the second communication satellite and the target position information at which the user terminal is currently located, and determine the ratio of the second distance to the speed of light as the second transmission delay.

[0119] In summary, by allowing the user terminal to calculate the first transmission delay and the second transmission delay, the transmission delay difference is calculated based on the first transmission delay and the second transmission delay, and the transmission delay difference is reported to the first communication satellite, so that the first communication satellite can subsequently adjust the target communication parameters according to the transmission delay difference, thereby compensating for the transmission delay difference.

[0120] To summarize, the above method can obtain the current target position information of the user terminal by interacting with the neighboring satellite of the first communication satellite (that is, the second communication satellite) when the user terminal is at the regional boundary of the signal coverage area of ​​the first communication satellite, which indicates that the user terminal may be about to leave the signal coverage area of ​​the first communication satellite. The method determines the target communication parameters corresponding to the user terminal according to the target position information, and sends the target communication parameters to the user terminal, so that the user terminal can communicate with the second communication satellite according to the target communication parameters, so that the user terminal can smoothly switch from the communication service provided by the first communication satellite to the communication service provided by the second communication satellite, thereby avoiding communication interruption caused by the user terminal leaving the signal coverage area of ​​the first communication satellite and ensuring the normal operation of the communication service of the user terminal.

[0121] The following combination Figure 8 , taking the application of the communication connection method provided in this specification in satellite communication as an example, the communication connection method is further described. Figure 8 A processing flow chart of a communication connection method provided by an embodiment of the present specification is shown, which specifically includes the following steps.

[0122] Step 802: The first communication satellite receives a communication parameter set sent by the second communication satellite, wherein the communication parameter set consists of communication parameters corresponding to a sub-area position within a signal coverage area of ​​the second communication satellite.

[0123] Specifically, the first communication satellite and the second communication satellite can exchange location-based SMTC parameters through the XN connection port, that is, the second communication satellite sends a communication parameter set to the first communication satellite, and the communication parameter set includes SMTC parameters corresponding to all sub-area locations within the signal coverage area of ​​the second communication satellite.

[0124] It can be understood that in the embodiments of this specification, the interaction between the first communication satellite and the second communication satellite is performed on the basis of CN (domain name).

[0125] Step 804: The first communication satellite sends position measurement configuration information to the user terminal.

[0126] Specifically, since the user terminal is within the signal coverage area of ​​the first communication satellite, the user terminal accesses the first communication satellite, and the first communication satellite can configure a location-based measurement configuration for the user terminal to enable the user terminal to start location-based measurement.

[0127] Step 806: When the user terminal determines that it has reached the target location, the user terminal sends the target location information of the target location to the first communication satellite, wherein the target location is at the regional boundary of the signal coverage area of ​​the first communication satellite.

[0128] Specifically, the user terminal can measure its own position in real time based on the position measurement configuration, and send the target position information of the target position to the first communication satellite when it is determined that it is at the boundary of the area covered by the signal of the first communication satellite.

[0129] Step 808: The first communication satellite selects a target communication parameter corresponding to the user terminal from the communication parameter set according to the target location information.

[0130] Specifically, the first communication satellite selects, according to the target position information, the SMTC parameter corresponding to the sub-region position closest to the target position in the communication parameter set as the target communication parameter.

[0131] Step 810: The user terminal sends the transmission delay difference to the first communication satellite.

[0132] Specifically, the first communication satellite may enable the user terminal to send the transmission delay difference to the first communication satellite through reconfiguration.

[0133] Step 812: The first communication satellite adjusts the target communication parameters according to the transmission delay difference, and sends the adjusted target communication parameters to the user terminal.

[0134] Specifically, the first communication satellite may adjust the above-selected SMTC parameters according to the transmission delay difference, and send the adjusted SMTC parameters to the user terminal.

[0135] Step 814: The user terminal establishes a communication connection with the second communication satellite based on the adjusted target communication parameters.

[0136] Specifically, if the switching condition is met at this time, inter-satellite switching can be triggered.

[0137] To summarize, the above method can obtain the current target position information of the user terminal by interacting with the neighboring satellite of the first communication satellite (that is, the second communication satellite) when the user terminal is at the regional boundary of the signal coverage area of ​​the first communication satellite, which indicates that the user terminal may be about to leave the signal coverage area of ​​the first communication satellite. The method determines the target communication parameters corresponding to the user terminal according to the target position information, and sends the target communication parameters to the user terminal, so that the user terminal can communicate with the second communication satellite according to the target communication parameters, so that the user terminal can smoothly switch from the communication service provided by the first communication satellite to the communication service provided by the second communication satellite, thereby avoiding communication interruption caused by the user terminal leaving the signal coverage area of ​​the first communication satellite and ensuring the normal operation of the communication service of the user terminal.

[0138] Corresponding to the above method embodiment, this specification also provides a communication connection system embodiment, Fig. 9 FIG. 1 shows a schematic diagram of a communication connection system provided by an embodiment of the present specification. Fig. 9 As shown, the system includes: a user terminal 902 and a first communication satellite 904, wherein:

[0139] The user terminal 902 is configured to send target location information of the target location to the first communication satellite when it is determined that the target location has been reached, wherein the target location is at a regional boundary of a signal coverage area of ​​the first communication satellite;

[0140] The first communication satellite 904 is configured to determine a target communication parameter corresponding to the user terminal according to the target position information in an interactive manner with a second communication satellite, and send the target communication parameter to the user terminal, so that the user terminal is connected to the second communication satellite for communication according to the target communication parameter, wherein the second communication satellite is a neighboring satellite of the first communication satellite;

[0141] The user terminal 902 is further configured to establish a communication connection with the second communication satellite according to the target communication parameters when it is determined that the user terminal has moved into the signal coverage area of ​​the second communication satellite.

[0142] In an optional embodiment, the user terminal 902 is further configured to monitor the interaction information between the user terminal and the second communication satellite according to the measurement period, measurement offset and measurement window included in the target communication parameters, and obtain monitoring results, wherein the monitoring results are used to enable the user terminal to use the communication service provided by the second communication satellite.

[0143] To summarize, the above-mentioned system can obtain the current target position information of the user terminal when the user terminal is at the regional boundary of the signal coverage area of ​​the first communication satellite, which indicates that the user terminal may be about to leave the signal coverage area of ​​the first communication satellite, and adopts a method of interacting with the neighboring satellite of the first communication satellite (that is, the second communication satellite) to determine the target communication parameters corresponding to the user terminal according to the target position information, and send the target communication parameters to the user terminal, so that the user terminal can communicate with the second communication satellite according to the target communication parameters, so that the user terminal can smoothly switch from the communication service provided by the first communication satellite to the communication service provided by the second communication satellite, thereby avoiding communication interruption caused by the user terminal leaving the signal coverage area of ​​the first communication satellite and ensuring the normal operation of the communication service of the user terminal.

[0144] The above is a schematic scheme of a communication connection system of this embodiment. It should be noted that the technical scheme of the communication connection system and the technical scheme of the communication connection method described above are of the same concept, and the details not described in detail in the technical scheme of the communication connection system can be referred to the description of the technical scheme of the communication connection method described above.

[0145] Fig.10 The block diagram of a computing device 1000 according to an embodiment of the present specification is shown. The components of the computing device 1000 include but are not limited to a memory 1010 and a processor 1020. The processor 1020 is connected to the memory 1010 via a bus 1030, and the database 1050 is used to store data.

[0146] The computing device 1000 also includes an access device 1040 that enables the computing device 1000 to communicate via one or more networks 1060. Examples of these networks include a public switched telephone network (PSTN), a local area network (LAN), a wide area network (WAN), a personal area network (PAN), or a combination of communication networks such as the Internet. The access device 1040 may include one or more of any type of network interface (e.g., a network interface card (NIC)) of wired or wireless, such as an IEEE 802.11 wireless local area network (WLAN) wireless interface, a world-wide interoperability for microwave access (Wi-MAX) interface, an Ethernet interface, a universal serial bus (USB) interface, a cellular network interface, a Bluetooth interface, a near field communication (NFC) interface, and the like.

[0147] In one embodiment of the present application, the above components of the computing device 1000 and Fig.10 Other components not shown in the figure may also be connected to each other, for example, via a bus. It should be understood that Fig.10 The computing device structure block diagram shown is only for the purpose of illustration, and is not intended to limit the scope of the present application. Those skilled in the art may add or replace other components as needed.

[0148] The computing device 1000 may be any type of stationary or mobile computing device, including a mobile computer or mobile computing device (e.g., a tablet computer, a personal digital assistant, a laptop computer, a notebook computer, a netbook, etc.), a mobile phone (e.g., a smart phone), a wearable computing device (e.g., a smart watch, smart glasses, etc.), or other types of mobile devices, or a stationary computing device such as a desktop computer or a personal computer (PC). The computing device 1000 may also be a mobile or stationary server.

[0149] The processor 1020 is used to execute the following computer executable instructions, which, when executed by the processor, implement the steps of the above-mentioned communication connection method.

[0150] The above is a schematic scheme of a computing device of this embodiment. It should be noted that the technical scheme of the computing device and the technical scheme of the above communication connection method belong to the same concept, and the details not described in detail in the technical scheme of the computing device can be referred to the description of the technical scheme of the above communication connection method.

[0151] An embodiment of the present specification further provides a computer-readable storage medium storing computer-executable instructions, which can implement the steps of the above-mentioned communication connection method when executed by a processor.

[0152] The above is a schematic scheme of a computer-readable storage medium of this embodiment. It should be noted that the technical scheme of the storage medium and the technical scheme of the above communication connection method belong to the same concept, and the details not described in detail in the technical scheme of the storage medium can be referred to the description of the technical scheme of the above communication connection method.

[0153] An embodiment of the present specification further provides a computer program, wherein when the computer program is executed in a computer, the computer is caused to execute the steps of the above-mentioned communication connection method.

[0154] The above is a schematic scheme of a computer program of this embodiment. It should be noted that the technical scheme of the computer program and the technical scheme of the above communication connection method belong to the same concept, and the details not described in detail in the technical scheme of the computer program can be referred to the description of the technical scheme of the above communication connection method.

[0155] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0156] The computer instructions include computer program codes, which may be in source code form, object code form, executable files or some intermediate forms, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the computer-readable medium may be appropriately increased or decreased according to the requirements of patent practice. For example, in some regions, according to patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0157] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the embodiments of this specification are not limited by the order of the actions described, because according to the embodiments of this specification, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the embodiments of this specification.

[0158] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0159] The preferred embodiments of this specification disclosed above are only used to help explain this specification. The optional embodiments do not describe all the details in detail, nor do they limit the invention to only the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of the embodiments of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the embodiments of this specification, so that technicians in the relevant technical field can well understand and use this specification. This specification is only limited by the claims and their full scope and equivalents.

Claims

1. A communication connection method, applied to a first communication satellite, It is characterized in that include: Acquire target location information corresponding to a user terminal at a target location, wherein the target location is at a region boundary of a signal coverage area of ​​a first communication satellite; Sending a parameter acquisition request to a second communication satellite, wherein the parameter acquisition request carries the target location information; receiving a target communication parameter corresponding to the user terminal selected by the second communication satellite from a communication parameter set corresponding to the second communication satellite according to the target position information, wherein the second communication satellite is a neighboring satellite of the first communication satellite, and the target communication parameter is an SMTC parameter; The target communication parameters are sent to the user terminal so that the user terminal can be connected to the second communication satellite in communication according to the target communication parameters when the user terminal moves to a signal coverage area of ​​the second communication satellite.

2. The method according to claim 1, It is characterized in that The acquiring target location information corresponding to the user terminal at the target location includes: Sending location measurement configuration information to the user terminal; When the user terminal is at the target location, target location information sent by the user terminal according to the location measurement configuration information is received.

3. The method according to claim 1, It is characterized in that After receiving the target communication parameter corresponding to the user terminal selected by the second communication satellite from the communication parameter set corresponding to the second communication satellite according to the target location information, the method further includes: receiving a transmission delay difference sent by the user terminal, wherein the transmission delay difference is a difference between a first transmission delay and a second transmission delay, the first transmission delay is a transmission delay between the user terminal and the first communication satellite, and the second transmission delay is a transmission delay between the user terminal and the second communication satellite; Adjusting the target communication parameters according to the transmission delay difference; Accordingly, the sending of the target communication parameters to the user terminal so that the user terminal is connected to the second communication satellite in communication according to the target communication parameters when the user terminal moves to the signal coverage area of ​​the second communication satellite, includes: The adjusted target communication parameters are sent to the user terminal, so that the user terminal can be connected to the second communication satellite in communication according to the adjusted target communication parameters when moving to the signal coverage area of ​​the second communication satellite.

4. The method according to claim 3, It is characterized in that The first transmission delay is calculated by the user terminal according to the first ephemeris information of the first communication satellite and the target position information corresponding to the user terminal; Correspondingly, after acquiring the target location information corresponding to the user terminal at the target location, the method further includes: Sending second ephemeris information of the second communication satellite to the user terminal so that the user terminal calculates the second transmission delay according to the target position information and the second ephemeris information.

5. A communication connection system, It is characterized in that comprising a user terminal and a first communication satellite, wherein: The user terminal is configured to send target location information of the target location to the first communication satellite when it is determined that the target location has been reached, wherein the target location is at a regional boundary of a signal coverage area of ​​the first communication satellite; The first communication satellite is configured to send a parameter acquisition request to a second communication satellite, wherein the parameter acquisition request carries the target location information; receive a target communication parameter corresponding to the user terminal selected by the second communication satellite from a communication parameter set corresponding to the second communication satellite according to the target location information, and send the target communication parameter to the user terminal, so that the user terminal is connected to the second communication satellite for communication according to the target communication parameter, wherein the second communication satellite is a neighboring satellite of the first communication satellite, and the target communication parameter is an SMTC parameter; The user terminal is further configured to, when it is determined that the user terminal has moved into a signal coverage area of ​​the second communication satellite, establish a communication connection with the second communication satellite according to the target communication parameters.

6. The system according to claim 5, It is characterized in that The user terminal is also configured to monitor the interaction information between the user terminal and the second communication satellite according to the measurement period, measurement offset and measurement window included in the target communication parameters, and obtain monitoring results, wherein the monitoring results are used to enable the user terminal to use the communication service provided by the second communication satellite.

7. A computing device, It is characterized in that include: Memory and processor; The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions. When the computer-executable instructions are executed by the processor, the steps of the method described in any one of claims 1 to 4 are implemented.

8. A computer-readable storage medium, It is characterized in that It stores computer executable instructions, which, when executed by a processor, implement the steps of the method described in any one of claims 1 to 4.

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