CN115085801B - Application mode switching system and method of satellite mobile communication system - Google Patents
Application mode switching system and method of satellite mobile communication system Download PDFInfo
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Abstract
The invention discloses an application mode switching system and method of a satellite mobile communication system. The method comprises the following steps: when the target wave beam needs to be switched to the special application mode, the conventional mode gateway controller equipment closes the conventional application mode of the target wave beam, the network management system submits a special application mode starting command of the target wave beam to the special application mode network control center, and the special application mode network control center performs special application mode channel equipment allocation and intermediate frequency switching matrix switch configuration; the user switches to a special application mode to carry out communication service; after the use of the special application mode is finished, the network management system submits a special application mode closing command to the special application mode network control center, and the target wave beam is switched back to the conventional application mode of the mobile communication. The invention enables the satellite mobile communication system to provide stable and reliable special application mode communication service with basic limit under the appointed wave beam.
Description
Technical Field
The invention belongs to the technical field of satellite mobile communication, and particularly relates to an application mode switching system and method of a satellite mobile communication system.
Background
The conventional application mode of the satellite mobile communication system is a mobile communication mode, which can provide a large-span, large-range, long-distance roaming, mobile and flexible mobile communication service for users, so that the mobile communication mode is an extension and extension of the terrestrial cellular mobile communication system, and has unique superiority in communication in remote areas, mountainous areas, islands, disaster areas, ocean vessels, and ocean planes.
However, the mobile communication channel used in the mobile communication mode is essentially a time-varying channel, and its various characteristics determine its susceptibility to various interference factors in the wireless environment. When the quality of the communication environment in a certain beam coverage area is seriously degraded, the system may not be able to continue to provide the mobile communication service under the beam, and at this time, the system is required to provide a simpler, more stable and more reliable communication transmission system to ensure communication. In addition, in the satellite mobile communication system, the communication between the user terminals needs to be forwarded to the ground at the gateway station, so the failure of the ground-segment mobile communication equipment may cause the system to be unable to continue providing the conventional mobile communication service for a certain period of time.
In the above situations, the satellite mobile communication system is required to support a special application mode except a conventional application mode, and meet diversified use requirements of the system in different scenes.
Disclosure of Invention
The invention aims to provide an application mode switching method of a satellite mobile communication system, which can ensure that a certain wave beam is switched from a conventional mobile communication mode to a special application mode by the satellite mobile communication system under certain specific conditions, ensure the continuation of communication, and can realize the dynamic allocation and use of channel equipment under any wave beam under the condition that the number of the channel equipment in the special application mode is less than that of the wave beams opened by the system, thereby realizing the maximum utilization of limited resources.
The technical solution for realizing the purpose of the invention is as follows: an application mode switching system of a satellite mobile communication system comprises a network management system, a conventional application mode access network and a special application mode access network, wherein the network management system is positioned at the top layer of a management plane on a logic network, and the conventional application mode access network and the special application mode access network belong to the same management level and are jointly subjected to management control of the network management system;
the network management system is arranged in the server equipment and is used for maintenance and management work of the whole network operation;
the conventional application mode access network is internally provided with conventional mode gateway controller equipment, and the conventional mode gateway controller equipment is used for processing a high-level protocol stack of a mobile communication application mode and providing an interface for receiving management control of a network management system;
and a sending intermediate frequency switching matrix, a receiving intermediate frequency switching matrix, special application mode channel equipment and a special application mode network control center are arranged in the special application mode access network, and the wireless access processing function of a satellite mobile terminal user in a special application mode is realized together.
An application mode switching method of a satellite mobile communication system, comprising the steps of:
step 1, when a target beam needs to be switched to a special application mode, a user submits a special application mode starting command of the target beam to a gateway controller device in a conventional mode from a network management system;
step 2, after the conventional mode gateway controller equipment receives the command, closing the conventional application mode of the target wave beam;
step 3, after the conventional application mode of the target wave beam is successfully closed, submitting a special application mode starting command of the target wave beam to a special application mode network control center by a network management system, and carrying out special application mode channel equipment allocation and intermediate frequency switching matrix switch configuration by the special application mode network control center;
step 4, after the special application mode of the target wave beam is started successfully, the user switches to the special application mode to carry out communication service;
step 5, after the use of the special application mode of the target beam is finished, the network management system submits a special application mode closing command to a special application mode network control center;
step 6, after the special application mode of the target wave beam is successfully closed, the network management system submits the conventional application mode opening command of the target wave beam to the conventional mode gateway controller equipment again, and the target wave beam is switched back to the conventional application mode of the mobile communication;
and 7, the user carries out the mobile communication service of the conventional application mode again under the target wave beam.
Compared with the prior art, the invention has the following remarkable advantages: (1) The satellite mobile communication system can switch a certain beam from a conventional mobile communication mode to a special application mode as required under certain specific conditions, so that the communication is ensured to continue, and diversified use requirements are met; (2) The channel equipment is dynamically allocated and used under a plurality of beams by pooling management of special application mode channel equipment and control switching of an input/output channel of an intermediate frequency switching matrix, so that the maximum utilization of limited resources is realized; (3) The device can automatically find and replace the fault channel device in operation, and the continuous and stable operation of the system is maintained.
Drawings
Fig. 1 is a flowchart of an application mode switching method of a satellite mobile communication system according to the present invention.
Fig. 2 is a schematic diagram of the connection between the channel equipment in special application mode and the if switch matrix according to the present invention.
Detailed Description
The invention relates to an application mode switching system of a satellite mobile communication system, which comprises a network management system, a conventional application mode access network and a special application mode access network, wherein the network management system is positioned at the top layer of a management plane on a logic network, and the conventional application mode access network and the special application mode access network belong to the same management level and are jointly subjected to management control of the network management system;
the network management system is arranged in the server equipment and is used for maintenance and management work of the whole network operation;
a conventional mode Gateway Controller device is arranged in the conventional application mode access network, the conventional mode Gateway Controller device (GSC, gateway Station Controller) is used for the high-level protocol stack processing of the mobile communication application mode, and an interface is provided for receiving the management control of a network management system;
and a sending intermediate frequency switching matrix, a receiving intermediate frequency switching matrix, a special application mode channel device and a special application mode network control center are arranged in the special application mode access network, and the wireless access processing function of a satellite mobile terminal user in a special application mode is realized together.
As a specific example, the application modes of the satellite mobile communication system include a normal mobile communication mode, an emergency communication mode, and an immunity communication mode, wherein the emergency communication mode and the immunity communication mode are application-specific modes.
As a specific example, the conventional mode gateway controller device is in the form of an ATCA chassis, and cooperates with a GTS to implement a wireless access processing function of a satellite mobile terminal user in a conventional application mode.
As a specific example, the special application mode channel device is configured to process a radio transceiving signal processing operation under a special application mode communication system, so as to implement a modulation and demodulation function;
the method comprises the steps that an intermediate frequency switching matrix is sent, and an intermediate frequency switching matrix is received and used for completing switching of a radio frequency channel connected with special application mode channel equipment;
the special application mode network control center completes the management and control of the sending intermediate frequency switching matrix, the receiving intermediate frequency switching matrix and the special application mode channel equipment, and provides an interface to receive the management control of the network management system; the special application mode network control center is arranged in the server device as a software unit.
The invention relates to an application mode switching method of a satellite mobile communication system, which comprises the following steps:
step 1, when a target beam needs to be switched to a special application mode, a user submits a special application mode starting command of the target beam to a conventional mode gateway controller device from a network management system;
step 2, after the conventional mode gateway controller equipment receives the command, closing the conventional application mode of the target wave beam;
step 3, after the conventional application mode of the target wave beam is successfully closed, the network management system submits a special application mode starting command of the target wave beam to a special application mode network control center, and the special application mode network control center performs special application mode channel equipment allocation and intermediate frequency switching matrix switch configuration;
step 4, after the special application mode of the target wave beam is started successfully, the user switches to the special application mode to carry out communication service;
step 5, after the use of the special application mode of the target beam is finished, the network management system submits a special application mode closing command to a special application mode network control center;
step 6, after the special application mode of the target wave beam is successfully closed, the network management system submits the conventional application mode opening command of the target wave beam to the conventional mode gateway controller equipment again, and the target wave beam is switched back to the conventional application mode of the mobile communication;
and 7, the user carries out the mobile communication service of the conventional application mode again under the target wave beam.
As a specific example, the step 1 specifically includes the following steps:
(11) When the target wave beam needs to be switched to a special application mode for communication task guarantee, inputting the starting time and the ending time of the special application mode of the target wave beam from a graphical man-machine interaction interface of a network management system by a user and submitting the starting time and the ending time;
(12) Network management system starting timer T 1 And a timer T 2 Timer T 1 For counting down the starting time of the special application mode of the target beam, timer T 2 Counting down the turn-off time of the target beam special application mode;
(13) When the timer T 1 After the countdown is finished, the network management system uses the SNMP to send the special application mode opening command to the gateway controller equipment in the conventional mode.
As a specific example, after the normal mode gateway controller device receives the command in step 2, the normal application mode of the target beam is closed, specifically:
after receiving the special application mode starting command of the target wave beam, the conventional mode gateway controller equipment releases all mobile communication channel resources occupied by the target wave beam, including a general control channel and a special service channel, wherein the general control channel comprises a broadcast control channel BCCH, a general control channel CCCH, a random access channel RACH and a cell broadcast channel CBCH.
And after finishing the channel release, the controller equipment of the gateway controller in the conventional mode informs the network management system that the conventional application mode of the target beam is closed.
As a specific example, in step 3, the special application mode network control center performs special application mode channel device allocation and intermediate frequency switch matrix switch configuration, which specifically includes the following steps:
(31) Application specific mode channel device assignment: the special application mode network control center allocates an idle available channel device D from the special application mode channel devices managed and maintained by the special application mode network control center, and configures target beam working parameters including forward and reverse working frequencies and sending power calculated according to link attenuation;
(32) Intermediate frequency switching matrix switch configuration: the special application mode network control center connects the allocated channel device D to the transceiving channel of the target beam by controlling and switching the input/output channel of the intermediate frequency switching matrix, so that the channel device D can transceive signals under the target beam, which is specifically as follows:
the intermediate frequency switching matrix is divided into a transmitting intermediate frequency switching matrix and a receiving intermediate frequency switching matrix;
for the medium frequency switching matrix sending, each input port is only connected with a sending end of one channel device, and the special application mode network control center records the connection relation between each input port and each channel device by using a configuration file; each output port of the sending intermediate frequency switching matrix is connected with a transmitting channel of one group of beams, and each group of transmitting channels fixedly comprises a plurality of beams; the special application mode network control center records the connection relation between the output port and the transmitting channels and the beam information contained in each transmitting channel by using a configuration file; the special application mode network control center realizes the free switching of the signal sent by the channel equipment on each beam transmitting channel by controlling the connection relation from the input port to the output port of the medium-frequency switching matrix; for a transmit intermediate frequency switching matrix with N input ports, the special application mode network control center uses an array structure D with the length of N T Recording the serial number of an output port connected with each input port;
for receiving the intermediate frequency switching matrix, each input port is connected with a group of receiving channels of wave beams, and the number of the receiving channels is consistent with the number rule of the transmitting channels; each output port of the receiving intermediate frequency switching matrix is only connected with a receiving end of one channel device, and the connection sequence is consistent with the connection sequence of the input ports of the sending intermediate frequency switching matrix; the special application mode network control center uses a configuration file to store the connection relation between the output port and the channel equipment; in contrast to the control logic for sending the intermediate frequency switching matrix, the special application mode network control center receives the intermediate frequency switching matrix through switching controlThe connection relation from the outlet to the input port realizes the free switching of the channel equipment on each beam receiving channel; for receiving intermediate frequency switching matrix with N output ports, the special application mode network control center uses an array structure D with the length of N R Recording the serial number of the input port connected with each output port;
the sending intermediate frequency switching matrix has a combining function of intermediate frequency signals, and the receiving intermediate frequency switching matrix has a shunting function and is used for configuring a plurality of channel devices to the same beam for load sharing work.
As a specific example, the step 5 is specifically as follows:
(51) When timer T 2 After the countdown is finished, the network management system uses an SNMP (simple network management protocol) to issue a target beam special application mode finishing command to a special application mode network control center;
(52) The special application mode network control center recovers the special application mode channel equipment which is distributed under the target wave beam and used, closes the input port and the output port of the sending intermediate frequency switching matrix and the receiving intermediate frequency switching matrix which are connected with the special application mode channel equipment, and informs the network management system that the special application mode is successfully closed.
As a specific example, the allocation and reclamation of the channel devices in the special application mode adopt a pooling management manner, which is specifically as follows:
network management system, normal mode gateway controller device, transmitting intermediate frequency switching matrix, receiving intermediate frequency switching matrix, special application mode channel device, and special application mode network control center
(1) The method comprises the following steps that a special application mode network control center firstly creates a channel device memory model and a channel device resource pool model;
the channel equipment memory model comprises the attributes and the operations of the channel equipment, wherein the attributes comprise the working parameters of equipment serial number, working state, beam number and alarm indication, and the operations comprise working start, idle setting and synchronous parameters; wherein, the equipment serial number is an identification mark of the channel equipment and is represented by Arabic numerals; the working state is divided into an online state and an offline state; when the beam number is zero, the channel equipment is not allocated to be used currently and is in an idle state, otherwise, the channel equipment is used under a target beam currently and is in a busy state; the alarm indication is divided into two conditions of alarm and no alarm;
the channel equipment resource pool model is a set of all channel equipment instance objects managed and maintained, the interior of the channel equipment resource pool model is divided into a free equipment set and a busy equipment set, and the operation aiming at the sets comprises the steps of allocating a channel equipment to work under a set beam and recovering the channel equipment;
(2) when a channel device needs to be allocated, the special application mode network control center calls an operation of allocating a channel device in the channel device resource pool model to work under a set beam, firstly, all channel devices in the idle device set are sorted from small to large according to the device serial numbers, then, an available channel device is selected from the device with the smallest serial number in a traversing mode, and the available channel device accords with three basic characteristics of online, idle and no fault;
(3) calling the starting operation of the channel equipment selected in the step (2), and transmitting the relevant working parameters of the wave beams;
(4) removing the selected channel equipment from the free equipment set of the channel equipment resource pool, and adding the selected channel equipment into a busy equipment set;
(5) when the channel equipment is used and can be returned, calling the operation of the recovered channel equipment in the resource pool model of the channel equipment, transmitting the equipment serial number of the channel equipment to be returned, setting the called channel equipment as idle operation, setting the beam number as zero, and closing a transmitting switch and a receiving switch;
(6) moving the returned channel device from the busy device set to the free device set for the next distribution;
(7) the special application mode network control center polls all the channel devices at regular time and updates the states of all the channel devices in the resource pool; marking the channel equipment which does not receive the polling response after overtime as lost connection, and marking the channel equipment which carries fault alarm information in the polling response as a fault;
(8) for the channel equipment marked as loss of connection and failure, judging whether the beam number configured by the channel equipment is zero, if the beam number is zero, indicating that the equipment is in an idle state, and not needing to do replacement work; if the channel equipment is not zero, the channel equipment is in a busy state and is used under a target beam, the channel equipment is replaced by normally available channel equipment, the steps (1) to (4) are repeated to allocate new channel equipment, and working parameters of the fault channel equipment are issued to the newly selected channel equipment.
As a specific example, in the application mode switching method of the satellite mobile communication system, one channel device is selected from managed special application mode channel devices and a target beam parameter is configured; and allocating the selected channel equipment to the radio frequency channel where the target beam is located, namely ensuring that the user terminal under the target beam can receive the downlink signal sent by the channel equipment, and the channel equipment can receive the uplink signal of the user terminal.
As a specific example, in the application mode switching method of the satellite mobile communication system, the number of the managed special application mode channel devices is smaller than the number of beams opened by the system, that is, the special application mode channel devices and the beams cannot have a one-to-one fixed allocation relationship.
As a specific example, in the application mode switching method of the satellite mobile communication system, a pooling management technique is adopted for the application-specific mode channel device. And creating a channel equipment model and a channel equipment resource pool model, and updating resource information in the resource pool in time to fulfill the aims of using and dynamically allocating channel equipment resources as required.
As a specific example, in the application mode switching method of the satellite mobile communication system, the channel device is allocated to the radio frequency channel where the target beam is located by switching the connection relationship of the input and output channels of the intermediate frequency switching matrix.
As a specific example, the application mode switching method of the satellite mobile communication system can automatically discover and replace a failed channel device in use. The invention adopts a polling mode to continuously traverse and detect the working states of all the channel devices, and if a certain allocated used channel device is detected to have a fault affecting the communication function, a new available channel device is selected from the channel device resource pool to replace the fault device for use, thereby realizing automatic discovery and automatic replacement of the fault device.
The invention is further described in detail below with reference to the drawings and specific embodiments.
The switching and starting of the special application mode in this embodiment is mainly completed by the cooperation of network management system software, gateway Station Controller (GSC) in the conventional mode, and a special application mode network control center (hereinafter referred to as network control center software).
The network management system software is responsible for the maintenance and management work of the whole network operation, is logically positioned at the top layer of a management surface and is deployed in the server equipment;
the GSC equipment is positioned in a conventional communication mode access network, is responsible for high-level protocol stack processing of a mobile communication mode and provides an interface for receiving management control of a network management system, and the equipment is in the form of an ATCA case and is matched with GTS equipment to jointly realize the wireless access processing function of the satellite mobile terminal in the mobile communication mode;
and the transmitting intermediate frequency switching matrix, the receiving intermediate frequency switching matrix, the special application mode channel equipment and the special application mode network control center are positioned in a special application mode access network, and jointly realize the wireless access processing function of the satellite mobile terminal in a special application mode.
Logically, the special application mode access network and the conventional mode access network belong to the same management level and receive the management control of the network management system together. In the special application mode channel equipment, the special application mode channel equipment is responsible for processing wireless transmitting and receiving signals under a special application mode communication system, and mainly realizes the modulation and demodulation function; the transmitting and receiving intermediate frequency switching matrix is responsible for completing the switching of a channel device connection radio frequency channel; the management and control of the equipment are finished by the special application mode network control center software, and an interface is also provided for receiving the management control of a network management system. The special application mode network control center is deployed in the server device as a software unit.
The application modes of the satellite mobile communication system comprise a conventional mobile communication mode, an emergency communication mode and an anti-jamming communication mode, wherein the emergency communication mode and the anti-jamming communication mode are used as special application modes and are a guaranteed communication means provided by the system. For example, the anti-interference communication mode is mainly applied to a scenario that the system cannot continue to provide mobile communication service under a certain beam when the communication environment quality in a coverage area of the beam is seriously degraded, and at this time, after the system switches to start the anti-interference communication mode, the satellite mobile terminal cannot continue to move voice service but can still perform basic short message service.
Referring to fig. 1, the application mode switching method of the satellite mobile communication system of the present embodiment includes the following steps:
(1) When a certain beam B needs to be switched to a special application mode for communication task guarantee, a user inputs the starting time and the ending time of the special application mode of the beam B from a graphical man-machine interaction interface of network management system software and submits the starting time and the ending time to be executed;
(2) Network management system software starting timer T 1 And T 2 ，T 1 Responsible for counting down the starting time of the special application mode of beam B, T 2 The system is responsible for counting down the closing time of the special application mode;
(3) Network management system software is regarded as T 1 After the timer countdown is finished, using an SNMP (simple network management protocol) to send a special application mode starting command to gateway controller equipment at first;
(4) After receiving the command, the gateway controller equipment releases all mobile communication channel resources occupied by the beam B, including a general control channel and a special service channel, wherein the general control channel mainly comprises a broadcast control channel BCCH, a general control channel CCCH, a random access channel RACH, a cell broadcast channel CBCH and the like;
(5) After finishing the channel release, the gateway controller informs the network management system that the conventional application mode of the beam B is closed;
(6) The network management system software uses SNMP management protocol and then issues a special application mode starting command to the network control center software;
(7) The network control center software allocates an idle available channel device D from the special application mode channel devices managed and maintained by the network control center software, and configures target beam working parameters including forward and reverse working frequencies, transmission power calculated according to link attenuation and the like;
(8) And (3) the network control center software automatically completes the connection of the channel equipment D distributed in the step (7) to the receiving and transmitting channel of the beam B by controlling and switching the input and output channels of the intermediate frequency switching matrix, and ensures that the channel equipment D can normally receive and transmit signals under the beam B. The if switching matrix is specifically constructed for a special application mode, and the connection relationship with the channel device is shown in fig. 2.
With reference to fig. 2, the connection between the if switching matrix and the channel device is completed. The intermediate frequency switching matrix is divided into a transmitting intermediate frequency switching matrix and a receiving intermediate frequency switching matrix. For the medium frequency switching matrix, each input port of the medium frequency switching matrix is only connected with a sending end of one channel device, for example, an input port 1 is connected with a sending end of 'channel device-01', and network control center software records the connection relation between each input port and each channel device by using a configuration file;
each output port of the transmit intermediate frequency switch matrix is connected with a transmit CHANNEL of a group of beams, each group of transmit CHANNELs fixedly comprises a plurality of beams, for example, output port 1 is connected with transmit CHANNEL 1 ，CHANNEL 1 Lower containment BEAM { BEAM 1 ，BEAM 2 , , ,BEAM X }. The network control center software records the connection relation between the output port and the transmitting channels and the beam information contained in each transmitting channel by using the configuration file;
the network control center software can realize the free switching of the signal sent by the channel equipment on each beam transmitting channel by controlling the connection relation from the input port to the output port of the medium-frequency switching matrix. For a transmit IF switching matrix with N INPUT ports, the network control center uses an array structure [ INPUT ] with length N 1 ,INPUT 2 ,,,INPUT N ]Hereinafter referred to as D T Recording the serial number of an output port connected with each input port;
for a receive intermediate frequency switching matrix, each input port of the matrix is connected with a receive channel of a group of beams, that isFor convenient management, the number of the receiving CHANNEL is consistent with the number rule of the transmitting CHANNEL, i.e. receiving CHANNEL 1 Also containing the BEAM { BEAM 1 ，BEAM 2 , , ,BEAM X An input port 1 for receiving the intermediate frequency switching matrix is also connected with a receiving CHANNEL 1 ；
Each output port of the receiving intermediate frequency switching matrix is only connected with the receiving end of one channel device, and for convenience of management, the connection sequence is consistent with the connection sequence of the input ports of the sending intermediate frequency switching matrix, namely the output port 1 is connected with the receiving end of the channel device-01. The network control center uses the configuration file to store the connection relation between the output port and the channel device;
contrary to the control logic for sending the intermediate frequency switching matrix, the network control center can realize free switching of the channel device on each beam receiving channel by switching and controlling the connection relationship from the output port to the input port of the receiving intermediate frequency switching matrix. For a receiving intermediate frequency switching matrix with N OUTPUT ports, the network control center uses an array structure [ OUTPUT1, OUTPUT2,, OUTPUT ] with length N N ]Hereinafter referred to as D R Recording the serial number of an input port connected to each output port;
now if it is necessary to assign "channel device-01" to BEAM 1 Under the number BEAM, both the transmitting end and the receiving end of the channel device need to be connected to the BEAM 1 CHANNEL of the structure 1 The above step (1); firstly, an input port 1 for controlling and sending an intermediate frequency switching matrix is connected to an output port 1, and a network control center modifies an array structure D T The value of element number 1 of 1 is 1; secondly, an output port 1 which needs to control and receive the intermediate frequency switching matrix is connected to an input port 1, and a network control center modifies an array structure D R The value of element number 1 of 1 is 1; network control center will array structure D T And D R The connection relation recorded in the step (2) is respectively issued to the sending and receiving intermediate frequency switching matrixes by using a private message protocol based on a UDP communication mode, and the configuration of the intermediate frequency switching matrixes is completed; so far, the channel device-01 can be in the BEAM BEAM 1 And normally transmitting and receiving signals.
In addition, the transmitting IF switching matrix has a function of combining the IF signals, and the receiving IF switching matrix has a function of splittingAnd the function is that a plurality of channel devices can be configured to the same beam to share the load. For example, in addition to "channel device-01", it is also necessary to configure "channel device-02" to BEAM 1 Then, it is only necessary to configure the input port 2 of the transmitting if switching matrix to be connected to the output port 1, and the input port 1 of the receiving if switching matrix to be connected to the output port 2.
(9) The user terminal under the wave beam B can be switched to the special application mode to carry out communication service;
(10) Network management system software is regarded as T 2 After the countdown of the timer is finished, using an SNMP (simple network management protocol) to issue a beam B special application mode ending command to network control center software;
(11) The network control center software recovers the channel equipment D allocated to be used under the wave beam B, closes an input port and an output port of a transmitting and receiving intermediate frequency switching matrix connected with the channel equipment D, sets the input port and the output port to be 0, and informs the network management system software that the special application mode is successfully closed;
(12) Network management system software sends down beam B special application mode closing command to gateway controller equipment;
(13) And the gateway controller equipment reconfigures the general control channel for opening the beam B, so that the user terminal under the beam B can normally search the broadcast signal to complete network access and recover the mobile communication service.
In the above work flow, for the allocation and recovery of channel devices in the special application mode, the present invention adopts a pooling management mode for the channel devices, and realizes the maximum utilization of resources under the condition of limited number of the configured channel devices, and the following steps are further described.
(1) The network control center software firstly creates a channel device memory model and a channel device resource pool memory model. The channel device memory model comprises the attributes and operations of the channel device, wherein the attributes comprise a device serial number, a working state, a beam number, an alarm indication and other working parameters, and the operations comprise 'working on', 'idle setting', 'synchronous parameters' and the like. Wherein, the equipment serial number is an identification mark of the channel equipment and is represented by Arabic numerals; the working state is divided into an online state and an offline state; when the beam number is zero, the channel device is not currently allocated to use and is in an idle state, and when the beam number is other effective values, the channel device is currently used under the beam and is in a busy state; the alarm indication is divided into two cases of alarm and no alarm. The channel device resource pool model is a set of all channel device instance objects managed and maintained, and is internally divided into a "free device set" and a "busy device set", and operations for the sets, such as "allocating a channel device to work under a certain beam", "recovering a certain channel device", and the like;
(2) when a channel device needs to be allocated, the network control center software firstly calls the operation of allocating a channel device to work under a certain beam in a resource pool model of the channel device, and for the convenience of management, the inside of the network control center software firstly sorts all channel devices in an idle device set from small to large according to the device serial numbers, and then traversably selects an available device from the device with the minimum serial number, wherein the available device must accord with three basic characteristics of online, idle and no fault;
(3) invoking the 'start work' operation of the channel equipment selected in the step (2), and transmitting the relevant working parameters of the wave beam;
(4) removing the selected channel equipment from the free equipment set of the channel equipment resource pool, and adding the selected channel equipment into the busy equipment set;
(5) when the channel equipment is used and can be returned, calling the operation of recovering certain channel equipment in the channel equipment resource pool model, and transmitting the equipment serial number of the channel equipment to be returned, wherein the operation internally sets the called channel equipment as idle operation, sets the beam number as zero, and closes a transmitting switch and a receiving switch;
(6) moving the returned channel device from the busy device set to the free device set for the next distribution;
(7) in addition, the network control center software can poll all the channel devices at regular time and update the states of all the channel devices in the resource pool in time. Marking channel equipment which does not receive polling response after timeout as 'loss of connection', and marking equipment which carries fault alarm information in polling response as 'fault';
(8) for the equipment marked as 'lost connection' and 'failure', judging whether the beam number configured by the channel equipment is zero, if the beam number is zero, indicating that the equipment is in an idle state, and not needing to carry out replacement work; if the working parameter is not zero, the equipment is in a busy state, the equipment is used under the beam and needs to be replaced by normally available equipment, under the condition, the steps (1) to (4) are repeated to allocate a new channel, and the working parameter of the fault equipment is sent to the newly selected channel equipment;
finally, the pooling management of the channel equipment in the special application mode is realized, and the purposes of using the equipment in the resource pool as required, namely, reusing the equipment after the equipment is used up and dynamically pooling management are achieved.
Claims (8)
1. An application mode switching system of a satellite mobile communication system is characterized by comprising a network management system, a conventional application mode access network and a special application mode access network, wherein the network management system is positioned at the top layer of a management plane on a logic network, and the conventional application mode access network and the special application mode access network belong to the same management level and are jointly subjected to management control of the network management system;
the network management system is arranged in the server equipment and is used for maintenance and management work of the whole network operation;
the conventional application mode access network is internally provided with conventional mode gateway controller equipment which is used for processing a high-level protocol stack of a mobile communication application mode and providing an interface for receiving management control of a network management system;
a sending intermediate frequency switching matrix, a receiving intermediate frequency switching matrix, a special application mode channel device and a special application mode network control center are arranged in the special application mode access network, and the wireless access processing function of a satellite mobile terminal user in a special application mode is realized together;
the special application mode channel equipment is used for processing wireless transceiving signal processing work under a special application mode communication system to realize a modulation and demodulation function;
the method comprises the steps that an intermediate frequency switching matrix is sent and received, and the intermediate frequency switching matrix is used for completing switching of a radio frequency access connected with special application mode channel equipment;
the special application mode network control center completes the management and control of the sending intermediate frequency switching matrix, the receiving intermediate frequency switching matrix and the special application mode channel equipment, and provides an interface to receive the management control of the network management system; the special application mode network control center is arranged in the server device as a software unit.
2. The application mode switching system of a satellite mobile communication system according to claim 1, wherein the application modes of the satellite mobile communication system include a normal mobile communication mode, an emergency communication mode, and an immunity communication mode, wherein the emergency communication mode and the immunity communication mode are application-specific modes.
3. The application mode switching system of claim 1, wherein the controller of the conventional mode gateway is configured as an ATCA chassis, and cooperates with a GTS to implement a radio access processing function of a satellite mobile terminal user in the conventional application mode.
4. An application mode switching method of a satellite mobile communication system, comprising the steps of:
step 1, when a target beam needs to be switched to a special application mode, a user submits a special application mode starting command of the target beam to a gateway controller device in a conventional mode from a network management system;
step 2, after the conventional mode gateway controller equipment receives the command, closing the conventional application mode of the target wave beam;
step 3, after the conventional application mode of the target wave beam is successfully closed, submitting a special application mode starting command of the target wave beam to a special application mode network control center by a network management system, and carrying out special application mode channel equipment allocation and intermediate frequency switching matrix switch configuration by the special application mode network control center;
step 4, after the special application mode of the target wave beam is started successfully, the user switches to the special application mode to carry out communication service;
step 5, after the use of the special application mode of the target beam is finished, the network management system submits a special application mode closing command to a special application mode network control center;
step 6, after the special application mode of the target wave beam is successfully closed, the network management system submits the conventional application mode opening command of the target wave beam to the conventional mode gateway controller equipment again, and the target wave beam is switched back to the conventional application mode of the mobile communication;
step 7, the user performs the mobile communication service of the conventional application mode again under the target wave beam;
in step 3, the special application mode network control center performs special application mode channel device allocation and intermediate frequency switching matrix switch configuration, which specifically includes the following steps:
(31) Application specific mode channel device assignment: the special application mode network control center allocates an idle available channel device D from the special application mode channel devices managed and maintained by the special application mode network control center, and configures target beam working parameters including forward and reverse working frequencies and transmission power calculated according to link attenuation;
(32) Intermediate frequency switching matrix switch configuration: the special application mode network control center controls and switches the input and output channels of the intermediate frequency switching matrix, and connects the allocated channel device D to the transceiving channel of the target beam, so that the channel device D can transmit and receive signals under the target beam, specifically as follows:
the intermediate frequency switching matrix is divided into a transmitting intermediate frequency switching matrix and a receiving intermediate frequency switching matrix;
for sending the intermediate frequency switching matrix, each input port is only connected with a sending end of one channel device, and the special application mode network control center records the connection relation between each input port and each channel device by using a configuration file; each output port of the transmit intermediate frequency switching matrix is connected to a transmit channel of a group of beams,each group of transmitting channels fixedly comprises a plurality of wave beams; the special application mode network control center records the connection relation between the output port and the transmitting channel and the beam information contained in each transmitting channel by using a configuration file; the special application mode network control center realizes the free switching of the signal sent by the channel equipment on each beam transmitting channel by controlling the connection relation from the input port to the output port of the medium-frequency switching matrix; for a transmitting intermediate frequency switching matrix with N input ports, the special application mode network control center uses an array structure D with the length of N T Recording the serial number of an output port connected with each input port;
for receiving the intermediate frequency switching matrix, each input port is connected with a group of receiving channels of wave beams, and the number of the receiving channels is consistent with the number rule of the transmitting channels; each output port of the receiving intermediate frequency switching matrix is only connected with a receiving end of one channel device, and the connection sequence is consistent with the connection sequence of the input ports of the sending intermediate frequency switching matrix; the special application mode network control center uses a configuration file to store the connection relation between the output port and the channel equipment; in contrast to the control logic for sending the intermediate frequency switching matrix, the special application mode network control center controls the connection relationship from the output port to the input port of the receiving intermediate frequency switching matrix through switching, so as to realize the free switching of the channel equipment on each beam receiving channel; for receiving intermediate frequency switching matrix with N output ports, the special application mode network control center uses an array structure D with the length of N R Recording the serial number of an input port connected to each output port;
the sending intermediate frequency switching matrix has a combining function of intermediate frequency signals, and the receiving intermediate frequency switching matrix has a shunting function and is used for configuring a plurality of channel devices to the same beam for load sharing work.
5. The method of claim 4, wherein the step 1 comprises the following steps:
(11) When the target wave beam needs to be switched to a special application mode for communication task guarantee, a user inputs the starting time and the ending time of the special application mode of the target wave beam from a graphical human-computer interaction interface of a network management system and submits the starting time and the ending time;
(12) Network management system starting timer T 1 And a timer T 2 Timer T 1 For counting down the starting time of the special application mode of the target beam, timer T 2 Counting down the turn-off time of the target beam special application mode;
(13) When the timer T 1 After the countdown is finished, the network management system uses the SNMP to send the special application mode opening command to the gateway controller equipment in the conventional mode.
6. The method as claimed in claim 5, wherein the step 2, after receiving the command, the normal mode gateway controller device closes the normal application mode of the target beam, specifically:
after receiving a special application mode starting command of a target wave beam, the conventional mode gateway controller equipment releases all mobile communication channel resources occupied by the target wave beam, including a general control channel and a special service channel, wherein the general control channel comprises a broadcast control channel BCCH, a general control channel CCCH, a random access channel RACH and a cell broadcast channel CBCH;
and after finishing the channel release, the controller equipment of the gateway in the normal mode informs the network management system that the normal application mode of the target beam is closed.
7. The method as claimed in claim 4, wherein the step 5 is as follows:
(51) When the timer T 2 After the countdown is finished, the network management system uses an SNMP (simple network management protocol) to issue a target beam special application mode finishing command to a special application mode network control center;
(52) The special application mode network control center recovers the special application mode channel equipment which is distributed under the target wave beam and is used, closes the input and output ports for sending and receiving the intermediate frequency switching matrix which are connected with the special application mode channel equipment, and informs the network management system that the special application mode is successfully closed.
8. The application mode switching method of the satellite mobile communication system according to claim 7, wherein the allocation and recovery of the special application mode channel devices is performed by using a pooling management method, which is as follows:
(1) the method comprises the following steps that a special application mode network control center firstly creates a channel equipment memory model and a channel equipment resource pool model;
the channel equipment memory model comprises the attributes and operations of the channel equipment, wherein the attributes comprise working parameters of equipment serial number, working state, beam number and alarm indication, and the operations comprise working start, idle setting and synchronous parameters; wherein, the equipment serial number is an identification mark of the channel equipment and is represented by Arabic numerals; the working state is divided into an online state and an offline state; when the beam number is zero, the channel equipment is not allocated to be used currently and is in an idle state, otherwise, the channel equipment is used under the target beam currently and is in a busy state; the alarm indication is divided into two conditions of alarm and no alarm;
the channel equipment resource pool model is a set of all channel equipment instance objects managed and maintained, and is divided into an idle equipment set and a busy equipment set, and the operations aiming at the sets comprise allocating a channel equipment to work under a set beam and recovering the channel equipment;
(2) when a channel device needs to be allocated, the special application mode network control center calls an operation of allocating a channel device in the channel device resource pool model to work under a set beam, firstly, all channel devices in the idle device set are sorted from small to large according to the device serial numbers, then, an available channel device is selected from the device with the smallest serial number in a traversing mode, and the available channel device accords with three basic characteristics of online, idle and no fault;
(3) calling the starting operation of the channel equipment selected in the step (2), and transmitting the relevant working parameters of the wave beams;
(4) removing the selected channel equipment from a free equipment set of a channel equipment resource pool, and adding the selected channel equipment into a busy equipment set;
(5) when the channel equipment is used and can be returned, calling the operation of the channel equipment for recovery in the channel equipment resource pool model, transmitting the equipment serial number of the channel equipment to be returned, setting the called channel equipment as idle operation, setting the beam number as zero, and closing the transmitting and receiving switches;
(6) moving the returned channel device from the busy device set to the free device set for the next distribution;
(7) the special application mode network control center polls all the channel devices at regular time and updates the states of all the channel devices in the resource pool; marking the channel equipment which does not receive the polling response after overtime as lost connection, and marking the channel equipment which carries fault alarm information in the polling response as a fault;
(8) for the channel equipment marked as loss of connection and failure, judging whether the beam number configured by the channel equipment is zero, if the beam number is zero, indicating that the equipment is in an idle state, and not needing to do replacement work; if the channel equipment is not zero, the channel equipment is in a busy state and is used under a target beam, the channel equipment is replaced by normally available channel equipment, the steps (1) to (4) are repeated to allocate new channel equipment, and working parameters of the fault channel equipment are issued to the newly selected channel equipment.
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| WO2022066147A1 (en) * | 2020-09-22 | 2022-03-31 | Viasat, Inc. | Techniques for switching between operating modes of beamforming systems and satellites |
| CN112311442A (en) * | 2020-10-12 | 2021-02-02 | 中国科学院微小卫星创新研究院 | Beidou third satellite emergency measurement and control system based on microwave intersatellite link load |
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