CN112787707B - Method for switching physical dedicated channel of satellite mobile communication system based on terminal side - Google Patents
Method for switching physical dedicated channel of satellite mobile communication system based on terminal side Download PDFInfo
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Abstract
The application discloses a method and a device for switching a physical dedicated channel of a satellite mobile communication system based on a terminal side. The method comprises the following steps: acquiring first reconfiguration information which is sent by a gateway station and aims at an uplink channel, a downlink channel and a time frequency offset calibration channel; reconfiguring according to the first reconfiguration information to obtain a new uplink channel, a new downlink channel and a new time frequency offset calibration channel; initiating a first time frequency offset calibration signal on the new time frequency offset calibration channel; sending the first time frequency offset calibration signal to a gateway station; and if the first time frequency offset calibration value aiming at the first time frequency offset calibration signal sent by the gateway station is obtained within the preset time length, switching the new uplink channel and the new downlink channel. According to the method and the device, the switching of the physical channels is executed by obtaining the time frequency offset calibration value, the problems of service interruption and even disconnection caused by link connection problems when the terminal switches the physical channels are avoided, and the purpose of dynamically switching the terminal between new and old uplink physical channels is achieved.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method for switching a physical dedicated channel of a satellite mobile communications system based on a terminal side.
Background
A satellite mobile communication system is a communication system in which mobile subscribers or mobile subscribers and fixed subscribers interact with each other using a communication satellite as a relay station. The satellite mobile communication system mainly comprises three parts, namely a space section, a ground section and a user section. Wherein, the space segment is composed of one or more satellites, which can be divided into geostationary orbit (GEO) and medium orbit (MEO) and low orbit (LEO) satellites according to the orbit used; the ground section consists of a control center and a ground gateway station; the user segment is a mobile user terminal, and specifically can be a handheld, vehicle-mounted, airborne, carrier-based or other mobile terminal. The satellite mobile communication system can provide wide-span, large-range and long-distance roaming and maneuvering flexible mobile communication service for global users, is the extension and extension of a land cellular mobile communication system, and has unique superiority in the communication aspects of remote areas, mountain areas, islands, disaster areas, ocean-going ships, long-range airplanes and the like.
In some specific scenarios, such as the change of user service, the interference of individual physical channels, etc., it is often necessary to change the uplink and downlink dedicated physical channel resources of the user. After the physical channel is changed, especially after the uplink physical channel is changed, the time-frequency domain calibration data originally acquired by the mobile terminal is not accurate, so that the service of the mobile user is interrupted for a long time and even dropped, and only the access request can be initiated again, thereby influencing the user experience.
Disclosure of Invention
In order to solve the above technical problems, the present application provides a method for switching a physical dedicated channel of a satellite mobile communication system based on a terminal side, a method for switching a physical dedicated channel of a satellite mobile communication system based on a gateway side, and an apparatus, a terminal and a medium thereof.
According to a first aspect of the present application, there is provided a terminal-side based handover method for a physical dedicated channel of a satellite mobile communication system, the method comprising:
acquiring first reconfiguration information aiming at an uplink channel, a downlink channel and a time frequency offset calibration channel, which are sent by a gateway station;
reconfiguring according to the first reconfiguration information to obtain a new uplink channel, a new downlink channel and a new time frequency offset calibration channel;
initiating a first time frequency offset calibration signal on the new time frequency offset calibration channel;
sending the first time frequency offset calibration signal to a gateway station;
and if the first time frequency offset calibration value aiming at the first time frequency offset calibration signal sent by the gateway station is obtained within the preset time length, switching the new uplink channel and the new downlink channel.
According to a second aspect of the present application, there is provided a method for switching a physical dedicated channel of a satellite mobile communication system based on a gateway side, the method including:
generating a creation request aiming at a time frequency offset calibration channel;
sending the creation request to a pre-configured channel resource management center;
and if the prompt information that the time frequency offset calibration channel sent by the channel resource management center is established is obtained, sending second reconfiguration information aiming at the uplink channel, the downlink channel and the time frequency offset calibration channel to the terminal so that the terminal establishes a new uplink channel, a new downlink channel and a new time frequency offset calibration channel according to the second reconfiguration information.
According to a third aspect of the present application, there is provided a terminal-side based switching apparatus for a physical dedicated channel of a satellite mobile communication system, the apparatus comprising:
the reconfiguration information acquisition module is used for acquiring first reconfiguration information which is sent by a gateway station and aims at an uplink channel, a downlink channel and a time frequency offset calibration channel;
the uplink channel configuration module is used for carrying out reconfiguration according to the first reconfiguration information to obtain a new uplink channel, a new downlink channel and a new time frequency offset calibration channel;
a first signal generating module, configured to initiate a first time frequency offset calibration signal on the new time frequency offset calibration channel;
the first signal processing module is used for sending the first time frequency offset calibration signal to the gateway station;
and the channel switching module is used for switching the new uplink channel and the new downlink channel if the first time frequency offset calibration value aiming at the first time frequency offset calibration signal sent by the gateway station is obtained within a preset time length.
According to a fourth aspect of the present application, there is provided a gateway-side-based switching apparatus for a physical dedicated channel of a satellite mobile communication system, the apparatus comprising:
a time frequency channel creating request generating module, configured to generate a creating request for a time frequency offset calibration channel;
the time-frequency channel creation request processing module is used for sending the creation request to a pre-configured channel resource management center;
and the channel reconfiguration information sending module is used for sending second reconfiguration information aiming at the uplink channel, the downlink channel and the time frequency offset calibration channel to the terminal if the prompt information that the time frequency offset calibration channel sent by the channel resource management center is established is obtained, so that the terminal establishes a new uplink channel, a new downlink channel and a new time frequency offset calibration channel according to the second reconfiguration information.
According to a fifth aspect of the present application, there is provided a terminal comprising: the processor executes the computer program to realize the switching method of the physical dedicated channel of the satellite mobile communication system based on the terminal side.
According to a sixth aspect of the present application, there is provided a terminal comprising: the processor executes the computer program to realize the switching method based on the physical dedicated channel of the satellite mobile communication system at the gateway side.
According to a seventh aspect of the present application, there is provided a computer-readable storage medium storing computer-executable instructions for performing the above-mentioned terminal-side based satellite mobile communication system physical dedicated channel handover method.
According to an eighth aspect of the present application, there is provided a computer-readable storage medium storing computer-executable instructions for performing the above-mentioned gateway-side based handover method for a physical dedicated channel of a satellite mobile communication system.
The method comprises the steps of acquiring first reconfiguration information aiming at an uplink channel, a downlink channel and a time frequency offset calibration channel sent by a gateway station, and reconfiguring according to the first reconfiguration information to obtain a new uplink channel, a new downlink channel and a new time frequency offset calibration channel, so that a first time frequency offset calibration signal is initiated on the new time frequency offset calibration channel and sent to the gateway station, and then under the condition of acquiring a first time frequency offset calibration value aiming at the first time frequency offset calibration signal sent by the gateway station, switching processing is carried out on the new uplink channel and the new downlink channel, and the switching mode of a new physical channel and an old physical channel is carried out by acquiring the time frequency offset calibration value, so that the effect of adjusting time frequency domain calibration data is achieved, and the problems that the time frequency domain calibration data of the new uplink physical channel directly switched by a terminal are inaccurate, the long-time interruption and even disconnection of mobile user services are caused, and the user experience is influenced are solved;
according to the method, the new physical channel can be established for the terminal, the control purpose of switching the uplink physical channel for the terminal is achieved, and the problem that long-time interruption and even disconnection of mobile user services are caused due to inaccurate time frequency domain calibration data acquired by the terminal originally can be avoided, and only an access request can be reinitiated to influence user experience is avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments of the present application will be briefly described below.
Fig. 1 is a flowchart illustrating a method for switching a physical dedicated channel of a terminal-based satellite mobile communication system according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a decoder of a method for switching a physical dedicated channel of a satellite mobile communication system based on a gateway side according to an embodiment of the present application;
fig. 3 is a schematic flowchart of a system for switching physical dedicated channels of a satellite mobile communication system according to an embodiment of the present application;
fig. 4 is a block diagram illustrating a switching apparatus for a physical dedicated channel of a terminal-based satellite mobile communication system according to an embodiment of the present application; and
fig. 5 is a block diagram illustrating a switching device for a physical dedicated channel of a satellite mobile communication system based on a gateway side according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It should be noted that although functional blocks are partitioned in a schematic diagram of an apparatus and a logical order is shown in a flowchart, in some cases, the steps shown or described may be performed in a different order than the partitioning of blocks in the apparatus or the order in the flowchart.
In the embodiment of the present application, the physical channel may be divided into an uplink physical channel and a downlink physical channel.
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
According to an embodiment of the present application, there is provided a method for switching a physical dedicated channel of a satellite mobile communication system, as shown in fig. 1, the method includes steps S101 to S105.
Step S101: and acquiring first reconfiguration information aiming at an uplink channel, a downlink channel and a time frequency offset calibration channel, which are sent by a gateway station.
Specifically, the terminal obtains first reconfiguration information, which is sent by the gateway station and aims at an uplink channel, a downlink channel and a time-frequency offset calibration channel.
In the embodiment of the present application, the reconfiguration information generally includes related information of the reconfigured physical dedicated channel including the uplink channel, the downlink channel, and the time-frequency offset calibration channel, such as parameters of the time-frequency offset calibration signal.
Step S102: and carrying out reconfiguration according to the first reconfiguration information to obtain a new uplink channel, a new downlink channel and a new time frequency offset calibration channel.
In The embodiment of The present application, the Uplink physical Channel includes a Physical Uplink Shared Channel (PUSCH), a Physical Uplink Control Channel (PUCCH), and a Physical Random Access Channel (PRACH). QPSK, 16QAM, 64QA M and 256QAM modulation modes are generally adopted.
Step S103: and initiating a first time frequency offset calibration signal on the new time frequency offset calibration channel.
In the embodiment of the present application, the time frequency offset calibration signal is used to calibrate the frequency offset of the signal.
Specifically, the time-frequency offset calibration signal is generally generated according to the new uplink physical signal and the original uplink physical channel.
Step S104: and sending the first time frequency offset calibration signal to the gateway station.
Specifically, the terminal communicates with the gateway station through a satellite wireless link, so as to send the first time frequency offset calibration signal to the gateway station.
Specifically, the first time frequency offset calibration signal may be sent according to a preset reporting condition. For example, the frequency offset calibration signal is sent when generated, or is reported according to a preset reporting period (e.g., 10 minutes per reporting interval).
Step S105: and if the first time frequency offset calibration value aiming at the first time frequency offset calibration signal sent by the gateway station is obtained within the preset time length, switching the new uplink channel and the new downlink channel.
According to the method, the first reconfiguration information aiming at the uplink channel, the downlink channel and the time-frequency offset calibration channel and sent by the gateway station is obtained, reconfiguration is carried out according to the first reconfiguration information, a new uplink channel, a new downlink channel and a new time-frequency offset calibration channel are obtained, a first time-frequency offset calibration signal is launched on the new time-frequency offset calibration channel and sent to the gateway station, and then under the condition that a first time-frequency offset calibration value aiming at the first time-frequency offset calibration signal and sent by the gateway station is obtained within a preset time length, switching processing is carried out on the new uplink channel and the new downlink channel.
In some embodiments, step S105 further comprises:
determining an original uplink channel used before reconfiguration;
and when the first time frequency offset calibration value aiming at the first time frequency offset calibration signal sent by the gateway station is obtained within the preset time length, starting the new uplink channel, and stopping using the original uplink channel to complete the switching from the original uplink channel to the new uplink channel.
According to the embodiment of the application, the first time frequency offset calibration value is obtained to serve as the switching condition of the new uplink channel, so that the problem of transmission failure of uplink data caused by improper switching time of the new uplink channel and the old uplink channel is solved.
In some embodiments, step S105 further comprises:
determining an original downlink channel used before reconfiguration;
generating first physical channel reconfiguration completion information for the first reconfiguration information;
and sending the first physical channel reconfiguration completion message to the gateway station, starting the new downlink channel, and stopping using the original downlink channel to complete the switching from the original downlink channel to the new downlink channel.
According to the embodiment of the application, the acquired first physical channel reconfiguration completion information is used as the switching condition of the new and old downlink channels, so that the problem of transmission failure of downlink data caused by improper switching time of the new and old downlink channels is solved.
In some embodiments, the method further comprises:
and if the first time frequency offset calibration value aiming at the first time frequency offset calibration signal sent by the gateway station is not obtained within the preset time length, sending the first time frequency offset calibration signal to the gateway station again until the time frequency offset calibration value aiming at the first time frequency offset calibration signal sent by the gateway station is obtained.
Specifically, the terminal acquires a notification message sent by the gateway station, where the notification message may be null, and may also include the first time frequency offset calibration value. If the notification message is empty or the notification message received within a predetermined time period is over and includes the time-frequency offset calibration value, the terminal retransmits the time-frequency offset calibration signal value to the gateway station, and the retransmission processing of the time-frequency offset calibration signal is performed, so that the subsequent terminal is ensured to be switched from the original uplink physical channel to a new uplink physical channel.
In some embodiments, the method further comprises:
and acquiring downlink data based on the new downlink channel.
When the gateway is applied, the terminal acquires data issued by the gateway station through the new downlink physical channel and sends uplink data to the gateway station through the new uplink channel.
According to an embodiment of the present application, there is provided a method for switching a physical dedicated channel of a satellite mobile communication system based on a gateway side, as shown in fig. 2, the method includes step S201, step S202 and step S203.
Step S201: a request to create a calibration channel for the time frequency offset is generated.
Specifically, the gateway station may generate a create request for a time-frequency offset calibration channel when at least one of the following conditions is detected: receiving a terminal service change request needing to switch a physical channel; the original physical channel experiences severe interference.
Step S202: and sending the creation request to a pre-configured channel resource management center.
Specifically, the gateway sends a creation request to a preconfigured channel resource management center.
In particular, the channel resource management center may be a channel management server for managing physical channels.
Step S203: and if the prompt information that the time frequency offset calibration channel sent by the channel resource management center is established is obtained, sending second reconfiguration information aiming at the uplink channel, the downlink channel and the time frequency offset calibration channel to the terminal so that the terminal establishes a new uplink channel, a new downlink channel and a new time frequency offset calibration channel according to the second reconfiguration information.
Specifically, the gateway receives a prompt message that the time-frequency offset calibration channel is created and sent by the channel resource management center. The prompt may include a create request sent by the gateway station.
Specifically, the gateway station may send the second physical channel reconfiguration information to the terminal when receiving the notification information that the time-frequency offset calibration channel sent by the channel resource management center is created; or sending the reconfiguration information of the second physical channel to the terminal within a predetermined time length of receiving the prompt message sent by the channel resource management center that the time-frequency offset calibration channel is created.
The method for realizing communication between the terminal and the channel resource management center through the gateway station not only can construct a new physical channel for the terminal, but also achieves the control purpose of switching the uplink physical channel for the terminal, and avoids the problem that the terminal can only reinitiate the access request to influence user experience because the time-frequency domain calibration data originally obtained by the terminal is inaccurate, thereby not only constructing the new physical channel for the terminal, but also realizing long-time interruption and even disconnection of mobile user services.
In some embodiments, the method further comprises:
acquiring a second time frequency offset calibration signal sent by the terminal;
determining a second time frequency offset calibration value of the second time frequency offset calibration signal;
generating a first establishment request aiming at establishing a new uplink channel according to the second time frequency offset calibration value;
and sending the first establishment request to a channel resource management center so that the channel resource management center establishes a new uplink channel.
Specifically, the gateway station obtains a second time frequency offset calibration signal (i.e., initiated by the terminal on the new time frequency offset calibration channel) sent by the terminal, so as to determine a second time frequency offset calibration value of the second time frequency offset calibration signal. More specifically, the second time-frequency offset calibration value may be calculated according to the new uplink physical channel and the old uplink physical channel.
Specifically, the gateway station acquires a second time-frequency offset calibration signal sent by the terminal through a satellite wireless link.
In some embodiments, the method further comprises:
and if the prompt information that the new uplink channel sent by the channel resource management center is established is acquired, sending the second time frequency offset calibration value to the terminal, and suspending the downlink data sending process.
Specifically, the gateway station controls the downlink data sending process, so that downlink data sending control is achieved, a switching time slot is provided for the terminal to start a new downlink physical channel, and the problems of inaccurate data and even disconnection caused by the fact that the terminal does not start the new downlink physical channel, namely the original downlink physical channel is used for obtaining the downlink data are avoided.
In some embodiments, the method further comprises:
if a second physical channel reconfiguration completion message sent by the terminal is acquired after the downlink data sending process is suspended, sending a second establishment request for establishing a new downlink channel to a channel resource management center;
and when the prompt information that the new downlink channel sent by the channel resource management center is created is acquired, restarting a downlink data sending process so as to send downlink data to the terminal according to the new downlink channel.
Specifically, the gateway station restarts the downlink data transmission process, thereby achieving the purpose of sending data by using the new downlink physical channel.
In some embodiments, the method further comprises:
after restarting a downlink data sending process, determining an original uplink channel, an original downlink channel and an original time frequency offset calibration channel aiming at a terminal;
generating a deletion request aiming at an original uplink channel, an original downlink channel and an original time frequency offset calibration channel;
and sending the deletion request to a channel resource management center so that the channel resource management center processes according to the deletion request.
Specifically, the gateway may send a deletion request to the channel resource management center when detecting that the terminal activates the new uplink channel and the new downlink physical channel.
To further illustrate the methods provided by the embodiments of the present application, the following detailed description is provided in conjunction with FIG. 3.
Fig. 3 provides a system for switching a physical dedicated channel of a satellite mobile communication system, which includes an information resource management center, a gateway station and a mobile terminal.
When the method is applied, if a gateway station side receives a terminal service change request needing to switch a physical channel or the original physical channel has serious interference, the gateway station generates a creation request aiming at a time frequency offset calibration channel and sends the creation request to a pre-configured channel resource management center because new physical channel resources need to be allocated to a mobile user, and sends physical channel reconfiguration information to a terminal under the condition of acquiring prompt information sent by the channel resource management center that the time frequency offset calibration channel is created. At the moment, the terminal reconfigures the uplink physical channel, and initiates a time frequency offset calibration signal on the newly allocated uplink physical channel, and the terminal sends the time frequency offset calibration signal to the gateway station; the gateway station calculates the time frequency offset calibration value of the time frequency offset calibration signal, sends a request for establishing a physical uplink channel to the channel resource management center, and sends the time frequency offset calibration value to the mobile terminal after acquiring the feedback information of establishing the uplink physical channel sent by the channel resource management center, so that the effect of informing the time frequency offset calibration value of the mobile terminal is achieved; and meanwhile, suspending the downlink data sending process. If the terminal does not receive the time frequency offset calibration value after overtime, the calibration signal is retransmitted; if the time frequency offset calibration value is received, starting a new physical uplink channel feedback reconfiguration completion message, and stopping using the original physical uplink channel; at this time, the terminal transmits physical channel reconfiguration complete information to the gateway station. And after receiving the physical channel reconfiguration completion information, the gateway station sends a downlink physical channel establishment request to the channel resource management center, and restarts a downlink data sending process after acquiring downlink physical channel feedback information sent by the channel resource management center. And then, the terminal starts a new downlink physical channel to receive downlink data. And then, the gateway station can send a request for deleting the original uplink physical channel, the original downlink physical channel and the time-frequency offset calibration channel to the channel resource management center.
In another embodiment of the present application, there is provided a terminal-side-based switching apparatus for a physical dedicated channel of a satellite mobile communication system, as shown in fig. 4, the apparatus including: a reconfiguration information acquisition module 401, an uplink channel configuration module 402, a first signal generation module 403, a first signal processing module 404, and a channel switching module 405.
A reconfiguration information obtaining module 401, configured to obtain first reconfiguration information, which is sent by a gateway station and is for an uplink channel, a downlink channel, and a time-frequency offset calibration channel;
an uplink channel configuration module 402, configured to perform reconfiguration according to the first reconfiguration information to obtain a new uplink channel, a new downlink channel, and a new time-frequency offset calibration channel;
a first signal generating module 403, configured to initiate a first time frequency offset calibration signal on the new time frequency offset calibration channel;
a first signal processing module 404, configured to send a first time frequency offset calibration signal to a gateway station;
the channel switching module 405 is configured to perform switching processing on a new uplink channel and a new downlink channel if a first time frequency offset calibration value for a first time frequency offset calibration signal sent by the gateway station is obtained.
According to the method and the device, the first reconfiguration information aiming at the uplink channel, the downlink channel and the time-frequency offset calibration channel, which is sent by the gateway station, is obtained through reconfiguration according to the first reconfiguration information, so that a new uplink channel, a new downlink channel and a new time-frequency offset calibration channel are obtained, a first time-frequency offset calibration signal is launched on the new time-frequency offset calibration channel, the first time-frequency offset calibration signal is sent to the gateway station, and then the new uplink channel and the new downlink channel are switched under the condition that the first time-frequency offset calibration value aiming at the first time-frequency offset calibration signal, which is sent by the gateway station, is obtained.
Further, the channel switching module includes:
an original uplink channel determining submodule, configured to determine an original uplink channel used before reconfiguration;
and the uplink channel switching submodule is used for starting a new uplink channel and stopping using the original uplink channel when the first time frequency offset calibration value aiming at the first time frequency offset calibration signal sent by the gateway station is obtained within a preset time length so as to complete the switching from the original uplink channel to the new uplink channel.
Further, the channel switching module further includes:
an original downlink channel determining submodule, configured to determine an original downlink channel used before reconfiguration;
the configuration feedback information generation submodule is used for generating first physical channel reconfiguration completion information aiming at the first reconfiguration information;
and the downlink channel switching submodule is used for sending the first physical channel reconfiguration completion message to the gateway station, starting the new downlink channel and stopping using the original downlink channel so as to complete the switching from the original downlink channel to the new downlink channel.
Further, the apparatus further comprises:
and the time-frequency offset signal retransmission sub-module is used for retransmitting the first time-frequency offset calibration signal to the gateway station until the time-frequency offset calibration value for the time-frequency offset calibration signal sent by the gateway station is obtained if the first time-frequency offset calibration value for the first time-frequency offset calibration signal sent by the gateway station is not obtained within the preset time length.
The switching device for a terminal-side based physical dedicated channel of a satellite mobile communication system according to this embodiment may perform the switching method for a terminal-side based physical dedicated channel of a satellite mobile communication system according to this embodiment, which is similar to the principle of the switching method, and is not described herein again.
Another embodiment of the present application provides a gateway-side-based switching apparatus for a physical dedicated channel of a satellite mobile communication system, as shown in fig. 5, the apparatus includes: a time-frequency channel creation request generation module 501, a time-frequency channel creation request processing module 502 and a channel reconfiguration information sending module 503.
A time-frequency channel creation request generating module 501, configured to generate a creation request for a time-frequency offset calibration channel;
a time-frequency channel creation request processing module 502, configured to send a creation request to a preconfigured channel resource management center;
the channel reconfiguration information sending module 503 is configured to send, if the prompt information that the time-frequency offset calibration channel sent by the channel resource management center is created is obtained, second reconfiguration information for the uplink channel, the downlink channel, and the time-frequency offset calibration channel to the terminal, so that the terminal creates a new uplink channel, a new downlink channel, and a new time-frequency offset calibration channel according to the second reconfiguration information.
According to the method, the terminal and the channel resource management center are communicated through the setting of the gateway station, not only can a new physical channel be established for the terminal, but also the control purpose of switching the uplink physical channel for the terminal is achieved, and the problem that the user experience is influenced due to the fact that the terminal cannot accurately obtain time-frequency domain calibration data originally, long-time interruption and even disconnection of mobile user services are caused, and only an access request can be reinitiated is avoided.
Further, the apparatus further comprises:
the time frequency offset signal acquisition module is used for acquiring a second time frequency offset calibration signal sent by the terminal;
a time frequency offset calibration value determining module, configured to determine a second time frequency offset calibration value of the second time frequency offset calibration signal;
the new uplink channel establishment generation module is used for generating a first establishment request for establishing the new uplink channel according to the second time frequency offset calibration value;
and the uplink channel establishment request sending module is used for sending the first establishment request to the channel resource management center so as to enable the channel resource management center to establish a new uplink channel.
Further, the apparatus further comprises:
and the first processing module is used for sending the second time frequency offset calibration value to the terminal and suspending a downlink data sending process if the prompt message that the new uplink channel sent by the channel resource management center is created is obtained.
Further, the apparatus further comprises:
the second processing module is used for sending a second establishment request for establishing a new downlink channel to the channel resource management center if a second physical channel reconfiguration completion message sent by the terminal is acquired after the downlink data sending process is suspended;
and the downlink data control module is used for restarting a downlink data sending process when acquiring the prompt information that the new downlink channel sent by the channel resource management center is created, so as to send downlink data to the terminal according to the new downlink channel.
Further, the apparatus further comprises:
the original physical channel determining submodule is used for determining an original uplink channel, an original downlink channel and an original time frequency offset calibration channel aiming at the terminal after the downlink data sending process is restarted;
a deletion request generation submodule, configured to generate a deletion request for an original uplink channel, an original downlink channel, and an original time frequency offset calibration channel;
and the deletion request processing submodule is used for sending the deletion request to the channel resource management center so that the channel resource management center processes according to the deletion request.
The switching device for a physical dedicated channel of a satellite mobile communication system based on a gateway station side in this embodiment can execute the switching method for a physical dedicated channel of a satellite mobile communication system based on a gateway station side provided in this embodiment, which is similar to the implementation principle, and is not described herein again.
Another embodiment of the present application provides a terminal, including: the processor executes the computer program to realize the switching method based on the physical dedicated channel of the terminal side satellite mobile communication system or the switching method based on the physical dedicated channel of the gateway side satellite mobile communication system.
In particular, the processor may be a CPU, general purpose processor, DSP, ASIC, FPGA or other programmable logic device, transistor logic device, hardware component, or any combination thereof. Which may implement or execute the various illustrative logical blocks, modules, and circuits described in connection with the disclosure herein. A processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a DSP and a microprocessor, or the like.
In particular, the processor is coupled to the memory via a bus, which may include a path for communicating information. The bus may be a PCI bus or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc.
The memory may be, but is not limited to, ROM or other type of static storage device that can store static information and instructions, RAM or other type of dynamic storage device that can store information and instructions, EEPROM, CD-ROM or other optical disk storage, optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
Optionally, the memory is used for storing codes of computer programs for executing the scheme of the application, and the processor is used for controlling the execution. The processor is configured to execute the application program codes stored in the memory, so as to implement the actions of the switching device based on the physical dedicated channel of the terminal-side satellite mobile communication system provided in the foregoing embodiments.
Optionally, the memory is used for storing codes of computer programs for executing the scheme of the application, and the processor is used for controlling the execution. The processor is configured to execute the application program codes stored in the memory, so as to implement the actions of the gateway-side satellite mobile communication system physical dedicated channel-based switching apparatus provided in the foregoing embodiments.
Yet another embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions for performing the above handover method based on a physical dedicated channel of a terminal-side satellite mobile communication system.
Yet another embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions for performing the above method for handover based on a physical dedicated channel of a gateway-side satellite mobile communication system.
The above-described embodiments of the apparatus are merely illustrative, and the units illustrated as separate components may or may not be physically separate, may be located in one place, or may be distributed over a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
One 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 instructions, 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 instructions, 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 is well known to those skilled in the art.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are to be included within the scope of the present invention defined by the claims.
Claims (11)
1. A method for switching a physical dedicated channel of a satellite mobile communication system based on a terminal side is characterized by comprising the following steps:
acquiring first reconfiguration information aiming at an uplink channel, a downlink channel and a time frequency offset calibration channel, which are sent by a gateway station;
reconfiguring according to the first reconfiguration information to obtain a new uplink channel, a new downlink channel and a new time frequency offset calibration channel;
initiating a first time frequency offset calibration signal on the new time frequency offset calibration channel;
sending the first time frequency offset calibration signal to the gateway station;
and if the first time frequency offset calibration value aiming at the first time frequency offset calibration signal sent by the gateway station is obtained within a preset time length, switching the new uplink channel and the new downlink channel.
2. The method according to claim 1, wherein the step of performing the switching process on the new uplink channel and the new downlink channel comprises:
determining an original uplink channel used before reconfiguration;
and when a first time frequency offset calibration value aiming at the first time frequency offset calibration signal sent by the gateway station is obtained within a preset time length, starting the new uplink channel, and stopping using the original uplink channel to complete the switching from the original uplink channel to the new uplink channel.
3. The method according to claim 2, wherein the step of performing the switching process on the new uplink channel and the new downlink channel further comprises:
determining an original downlink channel used before reconfiguration;
generating first physical channel reconfiguration completion information for the first reconfiguration information;
and sending the first physical channel reconfiguration completion message to the gateway station, starting the new downlink channel, and stopping using the original downlink channel to complete the switching from the original downlink channel to the new downlink channel.
4. The method of claim 1, further comprising:
and if the first time frequency offset calibration value which is sent by the gateway station and aims at the first time frequency offset calibration signal is not obtained within the preset time length, the first time frequency offset calibration signal is sent to the gateway station again until the time frequency offset calibration value which is sent by the gateway station and aims at the first time frequency offset calibration signal is obtained.
5. A method for switching a physical dedicated channel of a satellite mobile communication system based on a gateway side is characterized by comprising the following steps:
generating a creation request aiming at a time frequency offset calibration channel;
sending the creation request to a pre-configured channel resource management center;
and if the prompt information that the time frequency offset calibration channel is established and sent by the channel resource management center is acquired, sending second reconfiguration information aiming at the uplink channel, the downlink channel and the time frequency offset calibration channel to the terminal so that the terminal establishes a new uplink channel, a new downlink channel and a new time frequency offset calibration channel according to the second reconfiguration information.
6. The method of claim 5, further comprising:
acquiring a second time frequency offset calibration signal sent by the terminal;
determining a second time frequency offset calibration value of the second time frequency offset calibration signal;
generating a first establishment request for establishing a new uplink channel according to the second time frequency offset calibration value;
and sending the first establishment request to the channel resource management center so that the channel resource management center establishes a new uplink channel.
7. The method of claim 6, further comprising:
and if the prompt information that the new uplink channel sent by the channel resource management center is created is obtained, sending the second time frequency offset calibration value to the terminal, and suspending a downlink data sending process.
8. The method of claim 7, further comprising:
if a second physical channel reconfiguration completion message sent by the terminal is acquired after the downlink data sending process is suspended, sending a second establishment request for establishing a new downlink channel to the channel resource management center;
and when acquiring prompt information that the new downlink channel sent by the channel resource management center is created, restarting the downlink data sending process so as to send downlink data to the terminal according to the new downlink channel.
9. The method of claim 8, further comprising:
after restarting the downlink data transmission process, determining an original uplink channel, an original downlink channel and an original time frequency offset calibration channel for the terminal;
generating a deletion request aiming at the original uplink channel, the original downlink channel and the original time frequency offset calibration channel;
and sending the deletion request to the channel resource management center so that the channel resource management center processes according to the deletion request.
10. A terminal-based switching device for physical dedicated channels of a satellite mobile communication system, comprising:
the reconfiguration information acquisition module is used for acquiring first reconfiguration information which is sent by a gateway station and aims at an uplink channel, a downlink channel and a time frequency offset calibration channel;
the uplink channel configuration module is used for carrying out reconfiguration according to the first reconfiguration information to obtain a new uplink channel, a new downlink channel and a new time frequency offset calibration channel;
a first signal generating module, configured to initiate a first time frequency offset calibration signal on the new time frequency offset calibration channel;
the first signal processing module is configured to send the first time frequency offset calibration signal to the gateway station;
and the channel switching module is configured to perform switching processing on the new uplink channel and the new downlink channel if the first time frequency offset calibration value, which is sent by the gateway station and is for the first time frequency offset calibration signal, is obtained within a predetermined time period.
11. A device for switching a physical dedicated channel of a satellite mobile communication system based on a gateway side, comprising:
a time frequency channel creating request generating module, configured to generate a creating request for a time frequency offset calibration channel;
the time-frequency channel creation request processing module is used for sending the creation request to a pre-configured channel resource management center;
and the channel reconfiguration information sending module is configured to send second reconfiguration information for the uplink channel, the downlink channel, and the time-frequency offset calibration channel to the terminal if the prompt information that the time-frequency offset calibration channel is created and sent by the channel resource management center is obtained, so that the terminal creates a new uplink channel, a new downlink channel, and a new time-frequency offset calibration channel according to the second reconfiguration information.
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