CN113922866A - Low earth orbit satellite system, switching method thereof and computer readable storage medium - Google Patents
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Abstract
The application discloses a low orbit satellite system, a switching method thereof and a computer readable storage medium, which relate to the technical field of satellite communication and comprise the following steps: establishing a data bearing channel with an X2 port with a target satellite base station; sending a switching request signal to the target satellite base station to obtain a switching confirmation signal corresponding to the switching request signal; in response to the handover confirmation signal, transmitting a handover command signal to a terminal group, so that the terminal group detaches from the source satellite base station and attaches to the target satellite base station in response to the handover command signal, and transmits handover completion confirmation information to the target satellite base station; and sending serial number state information and user plane data information to the target satellite base station. The method and the device can improve the stability of link switching between the satellite base stations by arranging an X2 signaling interaction channel between the source satellite base station and the target satellite base station.
Description
Technical Field
The present disclosure relates to the field of satellite communications technologies, and in particular, to a low earth orbit satellite system, a switching method thereof, and a computer-readable storage medium.
Background
The communication satellite, like an international messenger, acts as a radio communication relay station. Various "letters" are collected from the ground and then "delivered" to the user at another location. The satellites can be divided into three types, namely geosynchronous orbit (GEO, 35786 km), medium orbit (MEO, 8000-20000 km) and low orbit (LEO, 500-2000 km), according to the running altitude. The low-earth-orbit satellite has the advantages of low orbit height, short transmission delay, small path loss, low transmission power consumption and the like, and the low-earth-orbit satellite develops rapidly in recent years. The field of low earth orbit satellites has also become a global battlefield for seizing global space strategic resources.
According to keplerian third law, the lower the satellite orbital altitude, the faster the speed. It is known that low earth orbit satellites have a characteristic of fast movement speed, and simultaneously play a role of a base station in the whole satellite communication system, and a ground terminal group needs to complete switching between satellites in a short time. In addition to the problem of high-speed movement, there are also problems that frequent handover may be caused by coverage of highly overlapped beams due to too short coverage time of the low-earth satellite on the ground, which all bring great challenges to the continuity of communication, and problems of transmission interruption, packet loss and the like which may occur during the handover process of a user.
Disclosure of Invention
The present application is directed to solving at least one of the problems in the prior art. Therefore, the application provides a low earth orbit satellite system, a switching method thereof and a computer readable storage medium, which can improve the stability of link switching between satellite base stations by arranging an X2 port signaling interaction channel between a source satellite base station and a target satellite base station.
In a first aspect, the present application provides a handover method for a low earth orbit satellite system, which is applied to a source satellite base station, and includes:
establishing a data bearing channel with an X2 port with a target satellite base station;
sending a switching request signal to the target satellite base station to obtain a switching confirmation signal corresponding to the switching request signal;
in response to the handover confirmation signal, transmitting a handover command signal to a terminal group, so that the terminal group detaches from the source satellite base station and attaches to the target satellite base station in response to the handover command signal, and transmits handover completion confirmation information to the target satellite base station;
and sending serial number state information and user plane data information to the target satellite base station.
The method for switching the low-earth-orbit satellite system according to the embodiment of the first aspect of the application has at least the following beneficial effects: a data bearing channel with an X2 port is established between a source satellite base station and a target satellite base station, the source satellite base station sends a switching request signal to the target satellite base station, the target satellite base station responds to the switching request signal and sends a switching confirmation signal to the source satellite base station after completing internal resource allocation, the source satellite base station responds to the switching confirmation signal and sends a switching command signal to a terminal group, the source satellite base station sends serial number state information and user plane data information to the target satellite base station, and the terminal group responds to the switching command signal, is detached from the source satellite base station, is attached to the target satellite base station and sends switching completion confirmation information to the target satellite base station. An X2 interface is established between the source satellite base station and the target satellite base station for data transmission, data transmission can be completed only by negotiation between the source satellite base station and the target satellite base station, switching of the attached satellite base stations by a terminal group can be realized, the stability of link switching between the satellite base stations is improved, and the continuity of user communication is ensured.
According to some embodiments of the first aspect of the present application, before the step of establishing a data bearer channel with the target satellite base station using the X2 interface, the method further includes: and sending a test control request signal to the terminal group and carrying out resource configuration on the terminal group so as to test the source satellite base station and send a test result report and an RRC (radio resource control) completion signal.
According to some embodiments of the first aspect of the present application, the test result report includes location information, signal quality information, and user level information of the source satellite base station.
According to some embodiments of the first aspect of the present application, after the steps of sending a test control request signal to the terminal group and performing resource configuration on the terminal group so as to test the source satellite base station and sending a test result report and an RRC complete signal, the method further includes: presetting switching threshold information; according to the test result report, if the test result report meets the switching threshold information, executing a step of establishing a data bearing channel with an X2 port between the target satellite base station and the target satellite base station; and if the test result report does not meet the switching threshold information, continuing to send the test control request signal.
According to some embodiments of the first aspect of the present application, the handover command signal includes reconfiguration information including beam physical identification of the target satellite base station, a beam access specific preamble sequence and a beam security algorithm.
In a second aspect, the present application further provides a handover method for a low earth orbit satellite system, which is applied to a target satellite base station, and includes:
establishing a data bearing channel with an X2 port with a source satellite base station so that the source satellite base station sends a switching request signal to the target satellite base station;
responding to the switching request signal, and after internal resource allocation is completed, sending a switching confirmation signal to the source satellite base station so that the source satellite base station sends a switching command signal to a terminal group;
acquiring switching completion confirmation information sent by a terminal group;
and acquiring serial number state information and user plane data information sent by the source satellite base station.
The method for switching the low-earth-orbit satellite system according to the embodiment of the second aspect of the application has at least the following advantages: a data bearing channel with an X2 port is established between a source satellite base station and a target satellite base station, the source satellite base station sends a switching request signal to the target satellite base station, the target satellite base station responds to the switching request signal and sends a switching confirmation signal to the source satellite base station after completing internal resource allocation, the source satellite base station responds to the switching confirmation signal and sends a switching command signal to a terminal group, the source satellite base station sends serial number state information and user plane data information to the target satellite base station, and the terminal group responds to the switching command signal, is detached from the source satellite base station, is attached to the target satellite base station and sends switching completion confirmation information to the target satellite base station. An X2 interface is established between the source satellite base station and the target satellite base station for data transmission, data transmission can be completed only by negotiation between the source satellite base station and the target satellite base station, switching of the attached satellite base stations by a terminal group can be realized, the stability of link switching between the satellite base stations is improved, and the continuity of user communication is ensured.
Some embodiments according to the second aspect of the present application, further comprising: sending path switching request information to a mobility management entity so that the mobility management entity sends user plane updating request information to a service gateway and the service gateway switches a downlink data path to the target satellite base station side; and acquiring path switching completion information from the mobile management entity. According to some embodiments of the first aspect of the present application, after the step of sending the path switching completion information to the target satellite base station by the mobility management entity in response to the user plane update completion information, the method further includes: and the target satellite base station responds to the path switching completion information and sends release signaling information to the source satellite base station.
According to some embodiments of the second aspect of the present application, after the step of obtaining the path switching completion information from the mobility management entity, the method further includes: and responding to the path switching completion information, and sending release signaling information to the source satellite base station.
In a third aspect, the present application provides a low earth orbit satellite system comprising: at least one memory; at least one processor; at least one program; the program is stored in the memory, and the processor executes at least one of the programs to implement the handover method of the low-earth orbit satellite system according to any one of the embodiments of the first aspect or the handover method of the low-earth orbit satellite system according to any one of the embodiments of the second aspect.
The low-orbit satellite system according to the embodiment of the third aspect of the application has at least the following advantages: a data bearing channel with an X2 port is established between a source satellite base station and a target satellite base station, the source satellite base station sends a switching request signal to the target satellite base station, the target satellite base station responds to the switching request signal and sends a switching confirmation signal to the source satellite base station after completing internal resource allocation, the source satellite base station responds to the switching confirmation signal and sends a switching command signal to a terminal group, the source satellite base station sends serial number state information and user plane data information to the target satellite base station, and the terminal group responds to the switching command signal, is detached from the source satellite base station, is attached to the target satellite base station and sends switching completion confirmation information to the target satellite base station. An X2 interface is established between the source satellite base station and the target satellite base station for data transmission, data transmission can be completed only by negotiation between the source satellite base station and the target satellite base station, switching of the attached satellite base stations by a terminal group can be realized, the stability of link switching between the satellite base stations is improved, and the continuity of user communication is ensured.
In a fourth aspect, the present application further provides a computer-readable storage medium storing a computer-executable signal for performing the handover method of the low-earth orbit satellite system according to any one of the embodiments of the first aspect or the handover method of the low-earth orbit satellite system according to any one of the embodiments of the second aspect.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
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Additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a general flow diagram of a handoff method for a low earth orbit satellite system according to some embodiments of the present application;
fig. 2 is a flow chart of a handover method of a low earth orbit satellite system according to an embodiment of the first aspect of the present application;
fig. 3 is a flowchart of a handover method of a low earth orbit satellite system according to another embodiment of the first aspect of the present application;
FIG. 4 is a flow chart of a handoff method for a low earth orbit satellite system according to an embodiment of the second aspect of the present application;
FIG. 5 is a flow chart of a handover method for a low earth orbit satellite system according to another embodiment of the second aspect of the present application;
fig. 6 is a schematic diagram of a low earth orbit satellite system of some embodiments of the present application.
Detailed Description
Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it is to be understood that the positional descriptions, such as the directions of up, down, front, rear, left, right, etc., referred to herein are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.
In the description of the present application, if there are first and second described only for the purpose of distinguishing technical features, it is not understood that relative importance is indicated or implied or that the number of indicated technical features or the precedence of the indicated technical features is implicitly indicated or implied.
In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.
A low earth orbit satellite system in the present application, comprising: the system comprises a terminal group (Terminals), a Source Satellite Base Station (Source Satellite Base Station), a Target Satellite Base Station (Target Satellite Base Station), a Gateway Station (GW) and the Internet, wherein the terminal group consists of a plurality of Terminals, the Satellite Base Station is connected with the Gateway Station and the terminal group, the Gateway Station is divided into a service Gateway (S-GW) and a packet Data Gateway (P-GW, Public Data Network Gateway) according to the sequence from the Satellite Base Station, the S-GW is responsible for enabling a user to access other networks for communication, the P-GW serves as a Gateway function, and terminal Data transmitted by a Satellite are accessed to the Internet through the Gateway Station. In addition, a Mobility Management Entity (MME) mainly performs mobility management, user context management, user identity allocation, and the like. The strategy provided by the invention is suitable for link switching between satellite base stations.
In a first aspect, referring to fig. 1 and fig. 2, the handover method for a low earth orbit satellite system provided in the present application is applied to a source satellite base station, and includes, but is not limited to, the following steps:
step S110: establishing a data bearing channel with an X2 port with a target satellite base station;
step S120: sending a switching request signal to a target satellite base station to obtain a switching confirmation signal corresponding to the switching request signal;
step S130: responding to the switching confirmation signal, sending a switching command signal to the terminal group, enabling the terminal group to respond to the switching command signal, detach from the source satellite base station, attach to the target satellite base station and send switching completion confirmation information to the target satellite base station;
step S140: and transmitting the serial number state information and the user plane data information to the target satellite base station.
It should be noted that the X2 interface is an interface between e-nodebs, and supports direct transmission of data and signaling. The e-NodeBs are connected with each other through an X2 interface to form a mesh network. The significant change of the LTE network compared with the conventional mobile communication network is caused because the network structure does not have the RNC, and the original tree-type branch structure is flattened, so that the base station bears more radio resource management tasks and needs to directly talk with the adjacent base stations more, thereby ensuring the seamless handover of the user in the whole network.
The whole satellite X2 port switching process comprises three parts of switching preparation, switching execution and switching completion:
in the preparation work of handover, it is necessary to ensure that the terminal group is in three states, namely, an EMM-Registered state, an ECM-Connected state, and an RRC-Connected state, the source satellite base station is in the RRC-Connected state, and the MME signaling entity is in two states, namely, the EMM-Registered state and the ECM-Connected state, so as to ensure that the terminal group can normally use services, and meanwhile, the MME has signaling connection with the terminal group, and can actively transmit and receive user data by using network communication.
In steps S110 to S120, a DL data bearer is established between the source satellite base station and the target satellite base station, and the signaling interaction of the X2 port is completed. The source satellite base station sends a handover request signal to the target satellite base station to indicate the target satellite base station to perform handover preparation; and after receiving the handover request signal, the target satellite base station sends a handover request acknowledge signal to the source satellite base station after the resource allocation is finished, and the handover preparation is indicated to be finished.
In steps S130 to S140, in the handover execution phase, the source satellite bs sends a handover command signal to the terminal group in response to the handover request acknowledge signal, where the handover command signal includes reconfiguration configuration information, transmits RRC connection reconfiguration configuration information to each terminal through the source satellite bs, and instructs all users in the terminal group to perform handover. Then, the source satellite base station sends SN (sequence number) STATUS TRANSFER serial number state information to the target satellite base station, at this time, the source satellite base station starts to forward the user plane data to the target satellite base station, and the target satellite base station caches the user plane data forwarded by the source satellite base station.
The source satellite base station and the target satellite base station are subjected to downlink data bearing through an X2 interface, data packets flow from the core network through the source satellite base station, are transferred to the target satellite base station through an X2 interface, are cached in the target satellite base station, and are established RRC connection. After receiving the switching command signal, each terminal in the terminal group is detached from the source satellite base station and executes beam synchronization with the target satellite base station, so as to attach to the target satellite base station, and the target satellite base station returns the resource allocation and timing advance information related to each terminal. Each terminal in the terminal group sends RRC connection configuration Complete confirmation information and confirms the switching completion process to the target satellite base station.
An X2 interface is established between the source satellite base station and the target satellite base station for data transmission, data transmission can be completed only by negotiation between the source satellite base station and the target satellite base station, switching of the attached satellite base stations by a terminal group can be realized, the stability of link switching between the satellite base stations is improved, and the continuity of user communication is ensured.
It is understood that the signaling involved in the reconfiguration information includes the physical beam identifier of the target satellite base station, the preamble sequence dedicated to beam access and the safety algorithm light of the beam, which are used to instruct all users in the terminal group to perform handover.
It is understood that, before step S110 in the present application, the following steps are included, but not limited to:
step S150: and sending a test control request signal to the terminal group and carrying out resource configuration on the terminal group so as to test the source satellite base station and send a test result report and an RRC (radio resource control) completion signal.
The method comprises the steps that a source satellite base station sends a test control request signal to a terminal group, the terminal group responds to the test control request signal and configures the measurement of the terminal through RRC connection configuration signaling, each terminal in the terminal group reports a test result report to the source satellite base station and sends an RRC complete signal to the source satellite base station, and a measurement report is used as the signaling.
The method comprises the steps that a source satellite base station issues a test control request signal to a terminal group, resource configuration is carried out on measurement of the terminal group through an RRC connection reconfiguration signaling, whether the terminal group meets a test condition of the source satellite base station or not is judged, and when the terminal group meets the test condition of the source satellite base station, all terminals in the terminal group report a test result report to the source satellite base station respectively.
It will be appreciated that the test result report includes location information of the source satellite base station, signal quality information, and user level information lights.
Referring to fig. 3, it can be understood that, after step S150 in the present application, the following steps are included, but not limited to:
step S161: presetting switching threshold information;
step S162: according to the test result report, if the test result report meets the switching threshold information, a step of establishing a data bearing channel with an X2 port with the target satellite base station is executed; and if the test result report does not meet the switching threshold information, continuing to send a test control request signal.
It should be noted that the handover threshold information is used to indicate that the position of the source satellite base station is about to exceed the service range of the terminal, and handover of satellite base station attachment is required. And the source satellite base station executes the step S110 according to the test result report sent from the terminal group, if the test result report meets the switching threshold information, the link switching between different satellite base stations is carried out, and if the test result report does not meet the switching threshold information, the test result report is continuously obtained until the switching threshold information is met. Namely, the source satellite base station performs switching judgment according to the measurement result information reported by each terminal in the terminal group and by combining with the actual adoption of a proper switching algorithm.
In a second aspect, referring to fig. 4, the present application further provides a handover method for a low earth orbit satellite system, applied to a target satellite bs, including but not limited to the following steps:
step S210: establishing a data bearing channel with an X2 port with a source satellite base station so that the source satellite base station sends a switching request signal to a target satellite base station;
step S220: responding to the switching request signal, and after completing internal resource allocation, sending a switching confirmation signal to the source satellite base station so that the source satellite base station sends a switching command signal to the terminal group;
step S230: acquiring switching completion confirmation information sent by a terminal group;
step S240: and acquiring serial number state information and user plane data information sent by the source satellite base station.
In steps S210 to S220, a DL data bearer is established between the source satellite base station and the target satellite base station, and the signaling interaction of the X2 port is completed. The source satellite base station sends a handover request signal to the target satellite base station to indicate the target satellite base station to perform handover preparation; and after receiving the handover request signal, the target satellite base station sends a handover request acknowledge signal to the source satellite base station after the resource allocation is finished, and the handover preparation is indicated to be finished.
In steps S230 to S240, in the handover execution phase, the source satellite bs sends a handover command signal to the terminal group in response to the handover request acknowledge signal, where the handover command signal includes reconfiguration configuration information, transmits RRC connection reconfiguration configuration information to each terminal through the source satellite bs, and instructs all users in the terminal group to perform handover. Then, the source satellite base station sends SN (sequence number) STATUS TRANSFER serial number state information to the target satellite base station, at this time, the source satellite base station starts to forward the user plane data to the target satellite base station, and the target satellite base station caches the user plane data forwarded by the source satellite base station.
The source satellite base station and the target satellite base station are subjected to downlink data bearing through an X2 interface, data packets flow from the core network through the source satellite base station, are transferred to the target satellite base station through an X2 interface, are cached in the target satellite base station, and are established RRC connection. After receiving the switching command signal, each terminal in the terminal group is detached from the source satellite base station and executes beam synchronization with the target satellite base station, so as to attach to the target satellite base station, and the target satellite base station returns the resource allocation and timing advance information related to each terminal. Each terminal in the terminal group sends RRC connection configuration Complete confirmation information and confirms the switching completion process to the target satellite base station.
An X2 interface is established between the source satellite base station and the target satellite base station for data transmission, data transmission can be completed only by negotiation between the source satellite base station and the target satellite base station, switching of the attached satellite base stations by a terminal group can be realized, the stability of link switching between the satellite base stations is improved, and the continuity of user communication is ensured.
Referring to fig. 5, it can be understood that the handover method of the low earth orbit satellite system proposed in the present application includes, but is not limited to, the following steps:
step S251: sending path switching request information to a mobile management entity so that the mobile management entity sends user plane updating request information to a service gateway and the service gateway switches a downlink data path to a target satellite base station side;
step S252: and acquiring path switching completion information from the mobile management entity.
After the switching of the port X2 is completed, the target satellite base station starts to send uplink data to the S-GW, but at the moment, the target satellite base station does not know whether the switching needs to be performed on Relocation of the S-GW, and only forwards the uplink data to the S-GW obtained from the source satellite base station. At this time, since the downlink tunnel to the target satellite bs is not established yet, the downlink data still needs to be forwarded to the target satellite bs through the X2 interface through the source satellite bs, and therefore, path switching and confirmation between the MME and the S-GW are required. When the buffered data packet in the destination base station is sent to the terminal group, it needs to end with an "end marker" to indicate that the transmission of the packet in the path is cut off. Namely, the data packet is transmitted to the target base station through the S-GW, and the target base station is transmitted to the terminal group.
In order to perform Path switching and confirmation between the MME and the S-GW, a target satellite base station firstly sends Path switching Request information (Path Switch Request) to the MME to inform a terminal group of changing a base station and a wave beam, air interface switching is completed, and the MME sends user plane updating Request information to the S-GW. After receiving the Request, the S-GW switches the downlink data Path to the target satellite base station side, sends User Plane Response (modified Bearer Request) User Plane update completion information to the MME, and the MME sends Path Switch ACK Path conversion completion information to the target satellite base station. Thus, the data path of the user plane is transferred from the source satellite base station to the target satellite base station. The process functions to transfer the user plane data information path from the source satellite base station to the target satellite base station.
It is understood that, after step S252, the following steps are included, but not limited to:
step S253: and responding to the path switching completion information, and sending release signaling information to the source satellite base station.
And the target base station sends UE Context Release Release signaling information to the source satellite base station, informs the source satellite base station that the terminal group is successfully switched and triggers the source satellite base station to Release resources. And the source satellite base station releases the resources after receiving the resource release signaling, thereby completing the whole switching work.
In a third aspect, the present application further provides a low-earth-orbit satellite system, including at least one memory, at least one processor, and at least one program, where the program is stored in the memory, and the processor executes the one or more programs to implement the handover method of the low-earth-orbit satellite system according to any one of the embodiments of the first aspect or the second aspect.
A data bearing channel with an X2 port is established between a source satellite base station and a target satellite base station, the source satellite base station sends a switching request signal to the target satellite base station, the target satellite base station responds to the switching request signal and sends a switching confirmation signal to the source satellite base station after completing internal resource allocation, the source satellite base station responds to the switching confirmation signal and sends a switching command signal to a terminal group, the source satellite base station sends serial number state information and user plane data information to the target satellite base station, and the terminal group responds to the switching command signal, is detached from the source satellite base station, is attached to the target satellite base station and sends switching completion confirmation information to the target satellite base station. An X2 interface is established between the source satellite base station and the target satellite base station for data transmission, data transmission can be completed only by negotiation between the source satellite base station and the target satellite base station, switching of the attached satellite base stations by a terminal group can be realized, the stability of link switching between the satellite base stations is improved, and the continuity of user communication is ensured.
The processor and the memory may be connected by a bus or other means, and fig. 6 illustrates one processor by way of example and a connection by a bus.
The memory, which is a non-transitory computer readable storage medium, may be used to store non-transitory software programs, non-transitory computer executable programs, and signals, such as program instructions/signals corresponding to the processing modules in the embodiments of the present application. The processor executes various functional applications and data processing by executing the non-transitory software programs, instructions and signals stored in the memory, namely, the method for switching the low-earth orbit satellite system of the above method embodiment is realized.
The memory may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area can store the related data of the automobile driving and steering safety early warning method and the like. Further, the memory may include high speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory optionally includes memory located remotely from the processor, and these remote memories may be connected to the processing module via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The one or more signals are stored in a memory and, when executed by the one or more processors, perform the method for handoff of a low-earth orbit satellite system in any of the method embodiments described above. For example, the above-described method steps S110 to S120 in fig. 2, method steps S161 to S162 in fig. 3, method steps S210 to S240 in fig. 4, and method steps S251 to S252 in fig. 5 are performed.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium storing computer-executable instructions, which when executed by one or more processors, may cause the one or more processors to perform the handover method of the low-earth orbit satellite system in the above method embodiments. For example, method steps S110 to S120 in fig. 2, method steps S161 to S162 in fig. 3, method steps S210 to S240 in fig. 4, and method steps S251 to S252 in fig. 5 are performed.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
From the above description of embodiments, those of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable signals, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable signals, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made without departing from the spirit of the present application within the knowledge of those skilled in the art.
Claims (10)
1. A switching method of a low earth orbit satellite system is applied to a source satellite base station, and comprises the following steps:
establishing a data bearing channel with an X2 port with a target satellite base station;
sending a switching request signal to the target satellite base station to obtain a switching confirmation signal corresponding to the switching request signal;
in response to the handover confirmation signal, transmitting a handover command signal to a terminal group, so that the terminal group detaches from the source satellite base station and attaches to the target satellite base station in response to the handover command signal, and transmits handover completion confirmation information to the target satellite base station;
and sending serial number state information and user plane data information to the target satellite base station.
2. The handoff method for a low earth orbit satellite system according to claim 1, wherein the step of establishing a data bearer channel with the target satellite base station using port X2 is preceded by the steps of:
and sending a test control request signal to the terminal group and carrying out resource configuration on the terminal group so as to test the source satellite base station and send a test result report and an RRC (radio resource control) completion signal.
3. The method of claim 2, wherein the test result report includes location information, signal quality information, and user level information of the source satellite bs.
4. The method for handing over to a low earth orbit satellite system according to claim 2, wherein the step of sending a test control request signal to the terminal group and performing resource configuration on the terminal group so as to test the source satellite bs and sending a test result report and an RRC completion signal further comprises:
presetting switching threshold information;
according to the test result report, if the test result report meets the switching threshold information, executing a step of establishing a data bearing channel with an X2 port between the target satellite base station and the target satellite base station; and if the test result report does not meet the switching threshold information, continuing to send the test control request signal.
5. The method of claim 1, wherein the handover command signal comprises reconfiguration information, the reconfiguration information comprising beam physical identifiers of the target satellite base station, a preamble sequence dedicated to beam access, and a beam security algorithm.
6. A switching method of a low earth orbit satellite system is applied to a target satellite base station, and comprises the following steps:
establishing a data bearing channel with an X2 port with a source satellite base station so that the source satellite base station sends a switching request signal to the target satellite base station;
responding to the switching request signal, and after internal resource allocation is completed, sending a switching confirmation signal to the source satellite base station so that the source satellite base station sends a switching command signal to a terminal group;
acquiring switching completion confirmation information sent by a terminal group;
and acquiring serial number state information and user plane data information sent by the source satellite base station.
7. The method for handoff of a low earth orbit satellite system according to claim 6, further comprising:
sending path switching request information to a mobility management entity so that the mobility management entity sends user plane updating request information to a service gateway and the service gateway switches a downlink data path to the target satellite base station side;
and acquiring path switching completion information from the mobile management entity.
8. The method for handover of a low earth orbit satellite system according to claim 7, wherein the step of obtaining the path switch completion information from the mobility management entity is followed by further comprising:
and responding to the path switching completion information, and sending release signaling information to the source satellite base station.
9. A low earth orbit satellite system, comprising:
at least one memory;
at least one processor;
at least one program;
the programs are stored in the memory, and the processor executes at least one of the programs to implement the handover method of the low earth orbit satellite system according to any one of claims 1 to 5 or the handover method of the low earth orbit satellite system according to any one of claims 6 to 8.
10. A computer-readable storage medium storing computer-executable signals for performing the method for handover of a low earth orbit satellite system according to any one of claims 1 to 5 or the method for handover of a low earth orbit satellite system according to any one of claims 6 to 8.
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| CN114786219A (en) * | 2022-02-25 | 2022-07-22 | 北京邮电大学 | Communication method of train passing through pipeline and related equipment |
| CN116155364A (en) * | 2023-03-02 | 2023-05-23 | 广州爱浦路网络技术有限公司 | Access method for multi-satellite cooperative communication and satellite communication system |
| CN116761221A (en) * | 2023-08-16 | 2023-09-15 | 中国星网网络系统研究院有限公司 | Inter-satellite switching method, system and device for satellite call service |
| CN116865841A (en) * | 2023-09-05 | 2023-10-10 | 四川创智联恒科技有限公司 | Satellite number exchange method based on satellite base station |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114786219A (en) * | 2022-02-25 | 2022-07-22 | 北京邮电大学 | Communication method of train passing through pipeline and related equipment |
| CN114786219B (en) * | 2022-02-25 | 2024-04-09 | 北京邮电大学 | Communication method of train passing through pipeline and related equipment |
| CN116155364A (en) * | 2023-03-02 | 2023-05-23 | 广州爱浦路网络技术有限公司 | Access method for multi-satellite cooperative communication and satellite communication system |
| CN116155364B (en) * | 2023-03-02 | 2023-08-29 | 广州爱浦路网络技术有限公司 | Access method for multi-satellite cooperative communication and satellite communication system |
| CN116761221A (en) * | 2023-08-16 | 2023-09-15 | 中国星网网络系统研究院有限公司 | Inter-satellite switching method, system and device for satellite call service |
| CN116761221B (en) * | 2023-08-16 | 2023-11-10 | 中国星网网络系统研究院有限公司 | Inter-satellite switching method, system and device for satellite call service |
| CN116865841A (en) * | 2023-09-05 | 2023-10-10 | 四川创智联恒科技有限公司 | Satellite number exchange method based on satellite base station |
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Application publication date: 20220111 |