CN116015382A - Beam switching method, device and satellite mobile communication system - Google Patents
Beam switching method, device and satellite mobile communication system Download PDFInfo
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- CN116015382A CN116015382A CN202211536076.7A CN202211536076A CN116015382A CN 116015382 A CN116015382 A CN 116015382A CN 202211536076 A CN202211536076 A CN 202211536076A CN 116015382 A CN116015382 A CN 116015382A
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Abstract
The application provides a beam switching method, a beam switching device and a satellite mobile communication system, wherein a satellite-borne terminal in the satellite mobile communication system is provided with a first service communication module and a second service communication module. Under the condition that a first service channel is established between a first beam and an access network by a first service communication module of a satellite-borne terminal, if the satellite-borne terminal detects that the satellite-borne terminal is in a beam overlapping area of a plurality of beams, determining a second beam to be switched to from the plurality of beams; and establishing a second service channel based on the second beam and the access network through the second service communication module, and releasing the first service channel between the first service communication module and the access network if the satellite-borne terminal confirms that the second service channel is successfully established. The scheme of the application can improve the success rate of beam switching.
Description
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a beam switching method and apparatus, and a satellite mobile communication system.
Background
The satellite mobile communication system mainly comprises a satellite, a terminal, an access network, a core network and an operation control system. The satellite is mainly used for transmitting wireless signals between the terminal and the access network. The terminal establishes connection with the access network based on the beam emitted by the satellite, and establishes communication connection with the core network and the operation control system through the access network.
With the high-speed movement of the satellite and the change of the terminal position, the beam in the satellite capable of covering the terminal also changes, and in order to ensure the reliable transmission of wireless signals between the terminal and the access network, the beam accessed by the terminal needs to be switched. Currently, in a satellite mobile communication system, an access network generally controls a terminal to switch beams according to a measurement report (for example, measurement information including a neighbor list, measurement values of each neighbor, pilot strength, and the like) reported by the terminal.
However, if the terminal in the satellite mobile communication system is a satellite-borne terminal mounted on a low-orbit satellite, due to the influence factors of very fast moving speed of the satellite-borne terminal, long transmission delay of a satellite link and the like, a measurement report received by an access network is inconsistent with the current real measurement condition of the satellite-borne terminal, so that the switching success rate is low.
Disclosure of Invention
The application provides a beam switching method, a beam switching device and a satellite mobile communication system so as to improve the success rate of beam switching.
In one aspect, the present application provides a beam switching method, which is applied to a satellite-borne terminal in a satellite mobile communication system, where the satellite-borne terminal has a first service communication module and a second service communication module, and the method includes:
under the condition that the first service communication module establishes a first service channel based on a first beam and an access network, if the satellite-borne terminal is detected to be in a beam overlapping area of a plurality of beams, determining a second beam to be switched to from the plurality of beams;
establishing a second service channel with the access network based on the second beam through the second service communication module;
and if the second service channel is confirmed to be successfully established, releasing the first service channel between the first service communication module and the access network.
In one possible implementation manner, before or simultaneously with releasing the first service channel between the first service communication module and the access network, the method further includes:
and switching a sending channel of the service data from the first service channel to the second service channel, and transmitting the service data to the access network through the second service channel.
In yet another possible implementation manner, the confirming that the second service channel has been successfully established includes:
and receiving a beam switching completion response sent by the second service communication module and receiving service data through the second service channel, wherein the beam switching completion response characterizes that the second service communication module has established the second service channel with the access network.
In yet another possible implementation, the mobile satellite communication system includes: a first satellite transmitting a beam, and a second satellite carrying the satellite-borne terminal;
the satellite-borne terminal is configured with first ephemeris information of the first satellite, beam characteristic information of a first satellite transmitting beam and second ephemeris information of the second satellite;
before determining the second beam to be switched to from the plurality of beams if the satellite-borne terminal is detected to be in the beam overlapping area of the plurality of beams, the method further comprises:
and detecting whether the satellite-borne terminal is in a beam overlapping region of a plurality of beams or not based on the first ephemeris information, the second ephemeris data and the beam characteristic information of the beam transmitted by the first satellite.
In yet another possible implementation manner, the determining, from the plurality of beams, the second beam to be switched to includes:
and selecting a second beam with highest signal intensity or the position of the beam center closest to the satellite-borne terminal from the beams except the first beam in the plurality of beams.
In yet another possible implementation manner, the first service communication module is configured with a first international mobile subscriber identity, and the first service channel is a service channel corresponding to the first international mobile subscriber identity
The second service communication module is configured with a second international mobile subscriber identity;
the first international mobile subscriber identity and the second international mobile subscriber identity are configured in an access network in the satellite mobile communication system to correspond to the same user identifier;
the establishing, by the second service communication module, a second service channel with the access network based on the second beam includes:
and establishing a second service channel corresponding to the second international mobile subscriber identity based on the second beam and the access network through the second service communication module, so that the access network transmits service data to the first service channel and the second service channel simultaneously based on the first international mobile subscriber identity and the corresponding relation between the second international mobile subscriber identity and the same user identifier.
In still another aspect, the present application further provides a beam switching apparatus, which is applied to a satellite-borne terminal in a satellite mobile communications system, where the satellite-borne terminal has a first service communications module and a second service communications module, and the apparatus includes:
the beam determining unit is used for determining a second beam to be switched to from the plurality of beams if the satellite-borne terminal is detected to be in a beam overlapping area of the plurality of beams under the condition that the first service communication module establishes a first service channel based on the first beam and an access network;
a channel establishing unit, configured to establish, by using the second service communication module, a second service channel with the access network based on the second beam;
and the channel releasing unit is used for releasing the first service channel between the first service communication module and the access network if the second service channel is confirmed to be successfully established.
In one possible implementation, the apparatus further includes:
and the channel switching unit is used for switching a sending channel of the service data from the first service channel to the second service channel before or while the channel releasing unit releases the first service channel between the first service communication module and the access network, and transmitting the service data to the access network through the second service channel.
In yet another possible implementation, the channel release unit includes:
and the channel release subunit is used for releasing the first service channel after receiving a beam switching completion response sent by the second service communication module and receiving service data through the second service channel, wherein the beam switching completion response characterizes that the second service communication module has established the second service channel with the access network.
In yet another aspect, the present application further provides a satellite mobile communication system, including:
a first satellite for transmitting a beam;
a second satellite carrying a satellite-borne terminal;
an access network;
the satellite-borne terminal is provided with a first service communication module and a second service communication module;
the satellite-borne terminal is used for executing the beam switching method according to any one of the above;
and configuring the first international mobile subscriber identity and the second international mobile subscriber identity to correspond to the same user identifier in the access network.
It can be known from the above that, in the embodiment of the present application, in the present application, if the on-board terminal detects that the on-board terminal is in the beam overlapping area of the multiple beams on the premise that the on-board terminal establishes the first service channel based on the first beam and the access network, the second beam to be switched to is determined, and the second service channel is established based on the second beam and the access network by using the second service communication module, so that whether the on-board terminal satisfies the beam switching condition or not and controls the beam switching is actively determined by the on-board terminal, and thus, abnormal switching caused by inconsistent measurement reports received by the access network and current real measurement conditions of the on-board terminal can be avoided, and the switching success rate can be improved. In addition, the satellite-borne terminal can release the first service channel established based on the first beam after confirming that the second service channel established based on the second beam is successfully established, so that the reliability of beam switching can be further ensured, and the loss of service data in the beam switching process can be reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a component architecture of a satellite mobile communication system to which embodiments of the present application are applicable;
fig. 2 is a schematic flow chart of a beam switching method according to an embodiment of the present application;
fig. 3 is a schematic flow interaction diagram of a beam switching method according to an embodiment of the present application.
Fig. 4 is a schematic diagram of a composition structure of a beam switching device according to an embodiment of the present application.
Detailed Description
The scheme of the embodiment of the application is suitable for a satellite mobile communication system with a satellite-borne terminal, is a novel beam switching mode and can improve the success rate of beam switching of the satellite-borne terminal.
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without undue burden, are within the scope of the present application.
For ease of understanding, a satellite mobile communication system to which the scheme of the present application is applied will be described.
Fig. 1 is a schematic diagram of a component architecture of a satellite mobile communication system to which the scheme of the present application is applied.
As can be seen from fig. 1, the satellite mobile communication system includes: a first satellite 101, an on-board terminal 102, an access network 103, a core network 104 and a control system 105.
Wherein the first satellite 101 is a satellite for transmitting a beam in a satellite mobile communication system.
The satellite-borne terminal 102 is a terminal mounted on a second satellite (not separately shown in fig. 1) and is a special mobile terminal (MobileEarthStation, MES).
The first satellite is typically a high-orbit satellite, and the second satellite on which the satellite-borne terminal is mounted is typically a low-orbit satellite. The low orbit satellite refers to a satellite with a flying height of less than 1000 km; and the high orbit satellite refers to a satellite with the flying height being more than 20000 km, and the beam coverage of the high orbit satellite is large.
As can be seen from fig. 1, the first satellite may be used for transmitting a wireless signal between the satellite-borne terminal and the access network, where the satellite-borne terminal establishes a service channel with the access network by accessing a beam of a certain frequency point transmitted by the first satellite, so as to implement service data transmission between the satellite-borne terminal and the access network.
The access network 103 may include a gateway station controller (GatewayTransceiverStation, GTS) 1031 and a gateway station transceiver (GatewayStationController, GSC) 1032. The GTS is mainly responsible for receiving uplink information forwarded by the satellite-borne terminal through the first satellite and forwarding downlink information of the network side to the first satellite. The GSC is mainly responsible for the flow management of accessing, establishing, releasing, modifying or switching the service of the satellite-borne terminal, and applying real-time wireless resources to the operation control system or releasing the real-time wireless resources according to the resource request of the satellite-borne terminal.
The core network 104, also referred to as a gateway core network (GatewayCoreNetwork, GCN), is primarily responsible for providing core switching and pepper routing functions.
The operations control system 105 is mainly responsible for managing and maintaining real-time radio resources.
Of course, the foregoing application is merely a brief description of a mobile satellite communication system, and various components of the mobile satellite communication system may have other functions, which are not limited thereto.
The inventors of the present application have studied to find that: the terminal in the common satellite mobile communication system is a terminal on the ground, and the coverage beam range of the high orbit satellite transmitting the beam in the satellite mobile communication system is larger, and the moving speed of the terminal on the ground is small, so that the probability of beam switching of the terminal is relatively smaller. Based on the information, the terminal measures the corresponding information and sends a measurement report to the access network, and the core network judges that the beam accessed by the terminal needs to be switched and controls the beam switching of the terminal to be suitable.
However, for the satellite mobile communication system related to the application, since the terminal is a satellite-borne terminal, and the movement speed of the satellite-borne terminal relative to the terminal on the ground is faster, the beam switching of the satellite-borne terminal is more frequent, so that the measurement information required to be measured by the satellite-borne terminal changes faster. Based on the above, if the beam switching mode of the common satellite mobile communication system is still adopted, after the satellite-borne terminal sends the measurement report to the access network, some measurement information on the satellite-borne terminal side is likely to be changed, so that the information indicated by the measurement report received by the access network is inconsistent with the real information on the satellite-borne terminal side, thereby causing abnormal beam switching and leading to low beam switching success rate.
However, if the frequency of reporting the measurement report to the access network by the satellite-borne terminal is increased in order to increase the success rate of beam switching, the frequency of the satellite-borne terminal needs to acquire and report the measurement information, which results in higher resource consumption and serious power consumption of the satellite-borne terminal; moreover, the beam switching success rate cannot be fundamentally improved.
Based on this, in order to improve the success rate of beam switching, the present application proposes to control the implementation of beam switching by the satellite-borne terminal, so as to avoid that the measurement report received by the access network is inconsistent with the real situation of the satellite-borne terminal side due to the beam situation change of the satellite-borne terminal side in the process that the satellite-borne terminal sends the measurement report to the access network.
Furthermore, in order to improve the reliability of beam switching and reduce the loss of service data in the beam switching process, the satellite terminal is provided with two service communication modules, namely a first service communication module and a second service communication module, which have the same functions and can be connected to the beam provided by the first satellite, and a service channel is established based on the beam of the first satellite and the access network.
The beam switching method of the present application is described below with reference to a flowchart.
Fig. 2 is a schematic flow chart of a beam switching method according to an embodiment of the present application, where the method is applied to a satellite-borne terminal in a satellite mobile communication system. The present embodiment may include:
s201, if the first service communication module establishes a first service channel based on the first beam and the access network, and if the satellite-borne terminal is detected to be in a beam overlapping area of a plurality of beams, determining a second beam to be switched to from the plurality of beams.
It can be understood that after the on-board terminal is started, if a certain beam transmitted by the first satellite needs to be accessed, a connection request for the beam can be directly sent to the access network to establish connection with the access network, that is, network access (network side registration) is realized on the basis of the service communication module. The specific implementation process is similar to the process that the terminal or the satellite-borne terminal in the satellite communication system establishes connection with the access network based on a certain wave beam, and the description is omitted.
For convenience of distinction, the service communication module of the connection between the satellite-borne terminal and the access network is called a first service communication module, the beam on which the first service communication module is connected with the access network is called a first beam, and the service channel between the satellite-borne terminal and the access network, which is established based on the first service communication module, is called a first service channel.
In order to be able to determine in time whether an on-board terminal needs to switch beams, the on-board terminal needs to detect whether it is in the beam overlap region of multiple beams. The beam overlapping area refers to an area where the beam coverage areas of the multiple beams overlap, so when the satellite terminal enters the beam overlapping area of the multiple beams from the coverage area of the single beam, it is stated that the satellite terminal is about to enter the beam coverage area of the multiple beams from the beam coverage area of one beam, that is, the condition of switching the beams is achieved, that is, the satellite terminal is about to switch from the first beam to another beam other than the first beam.
For ease of distinction, the beam of the plurality of beams to which the on-board terminal is to be switched is referred to as a second beam, which is a beam other than the first beam.
In the present application, there may be various specific implementations of detecting whether the on-board terminal is currently in the beam overlapping area. For example, the beam emission characteristics of the first satellite for emitting the beam, the relative operation relation between the first satellite and the second satellite carrying the satellite-borne terminal, and the like can be combined to determine which beams emitted by the first satellite are covered by the satellite-borne terminal at different moments, so as to determine whether the satellite-borne terminal is in the beam overlapping area of each beam.
In one possible implementation, the on-board terminal may be configured with first ephemeris information for a first satellite, beam characteristic information for a first satellite transmit beam, and second ephemeris information for the second satellite. Accordingly, the on-board terminal may detect whether the on-board terminal is in a beam overlapping region of the plurality of beams based on the first ephemeris information, the second ephemeris data, and the beam characteristic information of the first satellite transmit beam.
The ephemeris information of the satellite may include information according to satellite states such as an instantaneous position and an attitude of the satellite. For example, the ephemeris information of the satellite can be used for precisely calculating, predicting the time, position, speed and other running states of the satellite, realizing satellite tracking and the like, and the method is not limited.
For ease of distinction, the present application refers to the ephemeris information of a first satellite as first ephemeris information and the ephemeris information of a second satellite as second ephemeris information.
The beam characteristics of the beam transmitted by the first satellite may represent the distribution of the beam transmitted by the first satellite relative to the first satellite. For example, the beam characteristics of the first satellite transmit beam may include the number of beams transmitted by the first satellite, the frequency point of each beam, the distribution characteristics of the coverage area of the beam, and so on. Accordingly, based on the beam characteristics of the beam transmitted by the first satellite, the beam coverage area of each beam in the first satellite at a certain moment can be determined.
On the basis, the position relation of the second satellite relative to the first satellite at the current moment can be determined by combining the ephemeris information of the first satellite and the ephemeris information of the second satellite, the beam coverage area of each beam transmitted by the first satellite can be determined by combining the beam characteristics corresponding to the first satellite, on the basis, the beam coverage areas of the beams transmitted by the second satellite can be determined, namely, at least one target beam covered by the second satellite can be determined from the beams transmitted by the first satellite. If the number of at least one target beam is greater than two, it is indicated that the second satellite is in a beam overlap region of the plurality of beams.
There are various ways to determine the second beam, for example, when a beam other than the first beam is randomly selected from the plurality of beams as the second beam.
For another example, to ensure the communication quality between the on-board terminal and the access network, the application may also select a second beam with the highest signal strength or the closest beam center position to the on-board terminal from the beams other than the first beam in the multiple beams.
Of course, there may be other ways of selecting the second beam, without limitation.
S202, a second service channel is established through a second service communication module based on the second beam and the access network.
It can be understood that, in the case that the on-board terminal establishes the second service channel with the access network by using the first service communication module, and the on-board terminal does not enter the beam overlapping area, the second service communication module of the on-board terminal is in an idle state. And when the satellite-borne terminal needs to enter the beam overlapping area and needs to be switched to the second beam, the satellite-borne terminal can access the second beam by using the second service communication module on the premise of maintaining the first service channel, namely, a wireless link, namely, the service channel, is established based on the second beam and the access network.
It will be appreciated that the access to the second beam by the second service communication module is actually based on the process of registering the second service communication module with the access network, which is similar to the process of registering the terminal with the access network by the communication module in the satellite communication system at present, so as to establish a service channel with the access network, and the specific process is not limited.
And S203, if the second service channel is confirmed to be successfully established, releasing the first service channel between the first service communication module and the access network.
It can be understood that in the process of establishing the second service channel, the first service channel is maintained, so that the situation that service data transmitted by the access network side cannot be transmitted to the satellite-borne terminal in the process of switching from the first beam to the second beam can be reduced.
Accordingly, after the successful establishment of the second service channel is detected, in order to reduce resource consumption, the first service channel may be released, so that the first service communication module is restored to the idle state. Meanwhile, the second traffic channel may be utilized to perform traffic data transmission.
It can be understood that, in order to ensure that the on-board terminal can reliably switch the service from the first service channel to the second service channel, before or while releasing the first service channel, the sending channel of the service data may also be switched from the first service channel to the second service channel, and on this basis, the service data may be transmitted to the access network through the second service channel.
It can be known from the above that, in the embodiment of the present application, in the present application, if the on-board terminal detects that the on-board terminal is in the beam overlapping area of the multiple beams on the premise that the on-board terminal establishes the first service channel based on the first beam and the access network, the second beam to be switched to is determined, and the second service channel is established based on the second beam and the access network by using the second service communication module, so that whether the on-board terminal satisfies the beam switching condition or not and controls the beam switching is actively determined by the on-board terminal, and thus, abnormal switching caused by inconsistent measurement reports received by the access network and current real measurement conditions of the on-board terminal can be avoided, and the switching success rate can be improved.
In addition, the satellite-borne terminal can confirm that the second service channel based on the second beam is successfully established and then release the first service channel based on the first beam, so that the first service channel can still receive service data transmitted by the access network terminal in the beam switching process of the satellite-borne terminal, the condition that the service data sent by the access network from the source beam is lost in the beam switching process can be reduced, the reliability of beam switching can be further guaranteed, and the loss of the service data in the beam switching process can be reduced.
It can be appreciated that, before the first service channel is released, if the access network side still sends service data to the on-board terminal by using the first service channel, when the first service channel is released, there may still be service data that is not received, and thus service data may be lost.
Based on this, in order to further reduce the service data loss, the present application may confirm that the second service channel is successfully established and release the first service channel only when receiving the beam switch completion response sent by the second service communication module and receiving the service data through the second service channel. Wherein the beam switch complete response characterizes the second service communication module having established the second service channel with the access network.
It can be understood that when the second service channel receives service data, it indicates that the access network side has confirmed that the satellite-borne terminal completes registration through the second beam, and the access network can send service data to the satellite-borne terminal through the second service channel, so that it can be determined that the second beam is successfully switched, and the access network side has transmitted service data through the second service channel, at this time, there is no data sent by the first beam, but the satellite-borne terminal cannot receive the data, so that the first service channel can be released.
In an alternative manner, in order to enable the access network to determine that the first service communication module and the second service communication module belong to the same satellite-borne terminal, and further confirm that the first service channel and the second service channel are service channels established with the same satellite-borne terminal, in the application, the access network side may pre-configure a corresponding relationship between the first service communication module and the second service communication module and the satellite-borne terminal.
For example, the first service communication module and the second service communication module are respectively configured with different international mobile subscriber identities (InternationalMobileSubscriberIdentity, IMSI). That is, the first service communication module is configured with a first international mobile subscriber identity and the second service communication module is configured with a second international mobile subscriber identity. Of course, the first service communication module and the second service communication module are respectively provided with a user identification (SubscriberIdentityModule, SIM) card.
On the basis, the first service channel established by the method is the service channel corresponding to the first international mobile subscriber identity. For example, when the first service communication module establishes connection with the access network, the connection request sent by the first service communication module may carry the first international mobile subscriber identity, and correspondingly, after the first service channel is established, the access network and the satellite-borne terminal may store the correspondence between the first service channel and the first international mobile subscriber identity.
In order to identify that the first service communication module and the second service communication module belong to the same satellite-borne terminal, in the present application, the access network in the satellite mobile communication system may be configured with the first international mobile subscriber identity and the second international mobile subscriber identity corresponding to the same subscriber identity. The user identifier may be a user identifier of a user corresponding to the satellite-borne terminal.
Correspondingly, the satellite-borne terminal can establish a second service channel corresponding to the second international mobile subscriber identity through the second service communication module based on the second beam and the access network, so that the access network can transmit service data to the first service channel and the second service channel simultaneously based on the first international mobile subscriber identity and the corresponding relation between the second international mobile subscriber identity and the same user identifier.
On this basis, if the second service channel is successfully established, service data sent by the access network to the satellite-borne terminal through the first service channel is also received through the second service channel. Therefore, under the condition that the second service channel receives the service data, it can also be stated that the service data sent by the missed access network based on the first wave beam does not exist, and on the basis, the first service channel is released, so that the loss caused by the missed service data can be reduced or even avoided.
In order to facilitate understanding of the scheme of the present application, the beam switching method of the present application is described below from the interaction angle between two service communication modules in a satellite-borne terminal and an access network in a satellite mobile communication system.
Fig. 3 is a schematic flow chart of a beam switching method according to an embodiment of the present application.
In fig. 3, for convenience of description, connection relations between the first and second beams and the first and second service communication modules in the on-board terminal are shown in the access network.
As can be seen from fig. 3, this embodiment may include the following:
s301, under the condition that a first service channel is established between a first service communication module of the satellite-borne terminal and the access network based on the first wave beam, a main control module of the satellite-borne terminal performs data interaction with the access network based on the first service channel through the first service communication module.
If the satellite-borne terminal determines that the first beam needs to be accessed, the satellite-borne terminal can send a request for establishing wireless resource connection based on the first beam to the access network, and finally complete wireless resource connection, so that a first service channel of the first beam exists between the first service communication module and the access network.
The first service communication module is based on data interaction between the first service channel and the access network, and comprises the steps of sending service data to the access network based on the first service channel and receiving the service data sent by the access network.
S302, a main control module of the satellite-borne terminal detects whether the satellite-borne terminal is currently in a beam overlapping area of a plurality of beams based on first ephemeris information of a first satellite, second ephemeris data of a second satellite and beam characteristic information of a beam transmitted by the first satellite.
S303, if the main control module of the satellite-borne terminal detects that the satellite-borne terminal is in a beam overlapping area of a plurality of beams, determining a second beam to be switched to from the plurality of beams.
The specific implementation of determining whether the beam overlap region is located and determining the second beam may be referred to the related description of the foregoing embodiments, which is not repeated herein.
S304, the main control module of the satellite-borne terminal sends a beam switching command to the second service communication module.
The beam switch command is for instructing the second traffic communication module to switch to the second beam.
And S305, the second service communication module of the satellite-borne terminal responds to the beam switching command and sends a radio resource control connection request to the access network.
The radio resource control (RadioResourceControl, RRC) connection request is for requesting establishment of a radio resource connection based on the second beam.
S306, after obtaining the radio resource control connection request, if the access network agrees to establish the radio resource connection based on the second beam with the second service communication module, the access network returns a radio resource control connection instruction for the radio resource control request to the second service communication module.
S307, after receiving the radio resource control connection instruction, the second service communication module of the satellite-borne terminal returns a response message to the access network to construct a second service channel between the first service communication module and the access network based on the second beam.
Wherein the second wireless service channel is a wireless resource connection channel.
It should be understood that, the above steps S305 to S307 are described by taking an implementation manner in which the second service communication module establishes the second service channel based on the second beam with the access network as an example, and the same applies to the other manners of establishing the second service channel in this embodiment.
S308, after the second service channel is established, the second service communication module of the satellite-borne terminal sends a beam switching completion response to the main control module.
The beam switch complete response is used to characterize completion of establishment of the second traffic channel.
S309, the access network determines that the first service communication module and the second service communication module have a corresponding relation with the user identifier corresponding to the satellite-borne terminal, and simultaneously sends service data to the satellite-borne terminal through the first service channel and the second service channel.
For example, the access network may be configured with a correspondence between a first IMSI of the first service communication module and a second IMSI of the second service communication module and the same user identifier corresponding to the on-board terminal, and on this basis, it may be determined that the two service communication modules belong to the same user. Moreover, since the beam overlapping area is located in the beam overlapping area, the beam overlapping area at least includes the overlapping area of the first beam and the second beam, the access network can simultaneously send service data through the first service channel corresponding to the first beam and the second service channel corresponding to the second beam, so that both service channels can receive the service data from the access network.
The service data sent by the access network can come from the core network or can come from the access network, and the method is not limited.
S310, the main control module of the satellite-borne terminal confirms that the service data is received through the second service channel, switches the sending channel of the service data from the first service channel to the second service channel, and transmits the service data to the access network through the second service channel.
S311, the main control module of the satellite-borne terminal instructs the first service communication module to release the first service channel.
S312, the first service communication module of the satellite-borne terminal sends a release request of the first service channel to the access network to release the first service channel.
Corresponding to the beam switching method, the application also provides a beam switching device.
Fig. 4 is a schematic flow chart of a beam switching device according to an embodiment of the present application. The device is applied to a satellite-borne terminal in a satellite mobile communication system, and the satellite-borne terminal is provided with a first service communication module and a second service communication module, and the detailed description is related to the above.
The device comprises:
a beam determining unit 401, configured to determine, when the first service communication module establishes a first service channel based on a first beam and an access network, a second beam to be switched to from a plurality of beams if it is detected that the satellite-borne terminal is in a beam overlapping area of the plurality of beams;
a channel establishing unit 402, configured to establish, by using the second service communication module, a second service channel with the access network based on the second beam;
a channel releasing unit 403, configured to release the first service channel between the first service communication module and the access network if it is confirmed that the second service channel has been successfully established.
In one possible implementation, the apparatus further includes:
and the channel switching unit is used for switching a sending channel of the service data from the first service channel to the second service channel before or while the channel releasing unit releases the first service channel between the first service communication module and the access network, and transmitting the service data to the access network through the second service channel.
In yet another possible implementation, the channel release unit includes:
and the channel release subunit is used for releasing the first service channel after receiving a beam switching completion response sent by the second service communication module and receiving service data through the second service channel, wherein the beam switching completion response characterizes that the second service communication module has established the second service channel with the access network.
In yet another possible implementation, the mobile satellite communication system includes: a first satellite transmitting a beam, and a second satellite carrying the satellite-borne terminal;
the satellite-borne terminal is configured with first ephemeris information of the first satellite, beam characteristic information of a first satellite transmitting beam and second ephemeris information of the second satellite;
before the satellite-borne terminal is detected to be in the beam overlapping area of the plurality of beams, the method further comprises:
and the overlap detection unit is used for detecting whether the satellite-borne terminal is in a beam overlap area of a plurality of beams or not based on the first ephemeris information, the second ephemeris data and the beam characteristic information of the first satellite transmitting beam before the beam determination unit determines a second beam to be switched from the plurality of beams.
In yet another possible implementation manner, the beam determining unit is specifically configured to, when determining the second beam to be switched from the plurality of beams, select the second beam with the highest signal strength or the closest beam center position to the satellite terminal from the beams other than the first beam from the plurality of beams.
In a further possible implementation manner, the first service communication module is configured with a first international mobile subscriber identity, and the first service channel is a service channel corresponding to the first international mobile subscriber identity
The second service communication module is configured with a second international mobile subscriber identity;
the first international mobile subscriber identity and the second international mobile subscriber identity are configured in an access network in the satellite mobile communication system to correspond to the same user identifier;
a channel establishing unit comprising:
and the channel establishing subunit is used for establishing a second service channel corresponding to the second international mobile subscriber identity based on the second beam and the access network through the second service communication module, so that the access network transmits service data to the first service channel and the second service channel based on the first international mobile subscriber identity and the corresponding relation between the second international mobile subscriber identity and the same user identifier.
It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other. Meanwhile, the features described in the embodiments of the present specification may be replaced with or combined with each other to enable those skilled in the art to make or use the present application. For the apparatus class embodiments, the description is relatively simple as it is substantially similar to the method embodiments, and reference is made to the description of the method embodiments for relevant points.
Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application and are intended to be comprehended within the scope of the present application.
Claims (10)
1. A beam switching method, applied to a satellite-borne terminal in a satellite mobile communication system, the satellite-borne terminal having a first service communication module and a second service communication module, the method comprising:
under the condition that the first service communication module establishes a first service channel based on a first beam and an access network, if the satellite-borne terminal is detected to be in a beam overlapping area of a plurality of beams, determining a second beam to be switched to from the plurality of beams;
establishing a second service channel with the access network based on the second beam through the second service communication module;
and if the second service channel is confirmed to be successfully established, releasing the first service channel between the first service communication module and the access network.
2. The method of claim 1, wherein prior to or concurrently with releasing the first traffic channel between the first traffic communication module and the access network, further comprising:
and switching a sending channel of the service data from the first service channel to the second service channel, and transmitting the service data to the access network through the second service channel.
3. The method of claim 1, wherein the confirming that the second traffic channel has been successfully established comprises:
and receiving a beam switching completion response sent by the second service communication module and receiving service data through the second service channel, wherein the beam switching completion response characterizes that the second service communication module has established the second service channel with the access network.
4. The method of claim 1, wherein the mobile satellite communication system comprises: a first satellite transmitting a beam, and a second satellite carrying the satellite-borne terminal;
the satellite-borne terminal is configured with first ephemeris information of the first satellite, beam characteristic information of a first satellite transmitting beam and second ephemeris information of the second satellite;
before determining the second beam to be switched to from the plurality of beams if the satellite-borne terminal is detected to be in the beam overlapping area of the plurality of beams, the method further comprises:
and detecting whether the satellite-borne terminal is in a beam overlapping region of a plurality of beams or not based on the first ephemeris information, the second ephemeris data and the beam characteristic information of the beam transmitted by the first satellite.
5. The method of claim 1, wherein the determining a second beam from the plurality of beams to switch to comprises:
and selecting a second beam with highest signal intensity or the position of the beam center closest to the satellite-borne terminal from the beams except the first beam in the plurality of beams.
6. The method of claim 3, wherein the first service communication module is configured with a first international mobile subscriber identity, and the first service channel is a service channel corresponding to the first international mobile subscriber identity
The second service communication module is configured with a second international mobile subscriber identity;
the first international mobile subscriber identity and the second international mobile subscriber identity are configured in an access network in the satellite mobile communication system to correspond to the same user identifier;
the establishing, by the second service communication module, a second service channel with the access network based on the second beam includes:
and establishing a second service channel corresponding to the second international mobile subscriber identity based on the second beam and the access network through the second service communication module, so that the access network transmits service data to the first service channel and the second service channel simultaneously based on the first international mobile subscriber identity and the corresponding relation between the second international mobile subscriber identity and the same user identifier.
7. A beam switching device, for use in a satellite-borne terminal in a satellite mobile communications system, the satellite-borne terminal having a first traffic communication module and a second traffic communication module, the device comprising:
the beam determining unit is used for determining a second beam to be switched to from the plurality of beams if the satellite-borne terminal is detected to be in a beam overlapping area of the plurality of beams under the condition that the first service communication module establishes a first service channel based on the first beam and an access network;
a channel establishing unit, configured to establish, by using the second service communication module, a second service channel with the access network based on the second beam;
and the channel releasing unit is used for releasing the first service channel between the first service communication module and the access network if the second service channel is confirmed to be successfully established.
8. The apparatus as recited in claim 7, further comprising:
and the channel switching unit is used for switching a sending channel of the service data from the first service channel to the second service channel before or while the channel releasing unit releases the first service channel between the first service communication module and the access network, and transmitting the service data to the access network through the second service channel.
9. The apparatus of claim 7, wherein the channel release unit comprises:
and the channel release subunit is used for releasing the first service channel after receiving a beam switching completion response sent by the second service communication module and receiving service data through the second service channel, wherein the beam switching completion response characterizes that the second service communication module has established the second service channel with the access network.
10. A satellite mobile communications system, comprising:
a first satellite for transmitting a beam;
a second satellite carrying a satellite-borne terminal;
an access network;
the satellite-borne terminal is provided with a first service communication module and a second service communication module;
the on-board terminal is configured to perform the beam switching method according to any one of the preceding claims 1 to 6;
and configuring the first international mobile subscriber identity and the second international mobile subscriber identity to correspond to the same user identifier in the access network.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211536076.7A CN116015382A (en) | 2022-12-02 | 2022-12-02 | Beam switching method, device and satellite mobile communication system |
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| CN202211536076.7A CN116015382A (en) | 2022-12-02 | 2022-12-02 | Beam switching method, device and satellite mobile communication system |
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