CN113612513A - Communication satellite access control method and device based on navigation satellite message extension - Google Patents
Communication satellite access control method and device based on navigation satellite message extension Download PDFInfo
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- H—ELECTRICITY
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- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
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- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
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- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
- H04B7/18532—Arrangements for managing transmission, i.e. for transporting data or a signalling message
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- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
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- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
- H04B7/18569—Arrangements for system physical machines management, i.e. for construction operations control, administration, maintenance
- H04B7/18571—Arrangements for system physical machines management, i.e. for construction operations control, administration, maintenance for satellites; for fixed or mobile stations
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- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
- H04B7/18569—Arrangements for system physical machines management, i.e. for construction operations control, administration, maintenance
- H04B7/18573—Arrangements for system physical machines management, i.e. for construction operations control, administration, maintenance for operations control, administration or maintenance
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Abstract
The invention provides a communication satellite access control method and a communication satellite access control device based on navigation satellite message expansion, wherein the method comprises the steps that when uplink resources of a communication satellite are insufficient or meet preset conditions and uplink service needs to be temporarily closed, an uplink control instruction is sent to a navigation satellite control center by a communication satellite control center; and the navigation satellite control center generates an extended navigation message carrying the uplink control instruction information, broadcasts the extended navigation message to the navigation satellite, and the navigation satellite broadcasts the extended navigation message to the user terminal. According to the scheme of the invention, for the communication satellite with large-scale dispersed users, resources can be rapidly allocated, responded and timely controlled, and effective uplink transmission control is realized.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a communication satellite access control method and device based on navigation satellite message expansion.
Background
The satellite communication system has the advantages of wide coverage range, strong survivability and the like, and the satellite-based access network is an important supplement of the ground mobile communication network. The traditional satellite mobile communication based on circuit domain or packet domain switching, such as maritime satellite, Shula Asia satellite and China's Tiantong number one mobile communication satellite, adopts bidirectional closed-loop control to manage the access of each user terminal, and is suitable for the symmetric service with high requirement on link quality. The short message communication service of the Beidou third satellite navigation system in China supports the inbound of 1000 Chinese characters at a time, and the inbound access control information is broadcasted by adopting an outbound channel and comprises whether the transmission is allowed or not, the transmission frequency control and the like.
The return inbound capacity of a satellite mobile communication system is usually much higher than the forward outbound capacity, which is limited by the on-board power supply and power amplifier capabilities and is a resource bottleneck of the whole system. The point-to-point short messages and voice are traditional satellite mobile communication services with symmetrical uplink and downlink, and the novel commercial aerospace application represented by the satellite internet of things and emergency short messages is a typical novel asymmetric service mainly based on uplink transmission, so that the vacant return inbound capacity of a satellite mobile communication system can be effectively mined. The Beidou third short message system and the Tiantong first satellite communication system develop novel asymmetric services (hereinafter referred to as novel services) such as civil emergency short messages or Internet of things with low cost and low power consumption and mainly transmitted by uplink and downlink, and the novel services bring great difficulty to system operation and maintenance.
On the one hand, the new service generally requires extremely low terminal cost, and a large number of terminals do not have the capability of receiving normal service forward outbound signals and do not support the transmission of adopting normal outbound signals as control channel management and control terminals. On the other hand, if the new service terminal equipped with a stronger receiving antenna can support normal outbound signal reception, the new service terminal performs resource preemption with services such as normal short messages and telephone calls of each satellite in the aspect of forward outbound capacity, and the outbound capacity resource is the bottleneck of the whole system. Finally, how to dynamically allocate and control the usage proportion of the outbound and inbound capacities of the civil novel service and the non-civil service is to control all the civil terminals to turn off the transmission in a special state and convert all the capacities into the application in a special state, which is the problem that the traditional normal outbound signal as a control channel cannot solve. That is, how to perform rapid deployment, response and timely control on resources for communication satellites with large-scale dispersed users is a technical problem to be solved.
Disclosure of Invention
In order to solve the technical problems, the invention provides a communication satellite access control method and a communication satellite access control device based on navigation satellite text extension, and the method and the device are used for solving the problems that in the prior art, communication satellites of large-scale dispersed users rapidly allocate, respond and control resources in time.
According to a first aspect of the present invention, there is provided a communication satellite access control method based on navigation satellite text extension, the method comprising the steps of:
step S101: when uplink resources of a communication satellite are insufficient or meet preset conditions and uplink service needs to be temporarily closed, the communication satellite control center sends an uplink control instruction to a navigation satellite control center; the uplink control instruction is used for indicating the user side to close uplink transmission or reduce the uplink transmission frequency during access operation;
step S102: the navigation satellite control center generates an extended navigation message carrying the uplink control instruction information, broadcasts the extended navigation message to the navigation satellite, and the navigation satellite broadcasts the extended navigation message to a user terminal;
step S103: the navigation satellite broadcasts the extended navigation message to a user side;
step S104: and the user side analyzes the extended navigation message and closes or reduces uplink transmission to the communication satellite according to the instruction requirement.
According to a second aspect of the present invention, there is provided a communication satellite access control device based on navigation satellite text extension, the device comprising:
an uplink control instruction generation module: the method comprises the steps that when uplink resources of a communication satellite are insufficient or meet preset conditions and uplink service needs to be closed temporarily, the communication satellite control center sends an uplink control instruction to a navigation satellite control center; the uplink control instruction is used for indicating the user side to close uplink transmission or reduce the uplink transmission frequency during access operation;
the extended navigation message generation module: configuring the navigation satellite control center to generate an extended navigation message carrying the uplink control instruction information, broadcasting the extended navigation message to the navigation satellite, and broadcasting the extended navigation message to a user terminal by the navigation satellite;
the extended navigation message broadcasting module comprises: configuring the navigation satellite to broadcast the extended navigation message to a user terminal;
a user response module: and the configuration is that the user terminal analyzes the extended navigation message and closes or reduces uplink transmission to the communication satellite according to the instruction requirement.
According to a third aspect of the present invention, there is provided a communication satellite access control system based on navigation satellite text extension, comprising:
a processor for executing a plurality of instructions;
a memory to store a plurality of instructions;
wherein the instructions are used for being stored by the memory and loaded and executed by the processor to implement the communication satellite access control method based on the navigation satellite message extension.
According to a fourth aspect of the present invention, there is provided a computer readable storage medium having a plurality of instructions stored therein; the plurality of instructions are used for loading and executing the communication satellite access control method based on the navigation satellite message extension by the processor.
According to the scheme, the method is based on the Beidou Satellite Navigation System message expansion, the message type is expanded by increasing message types, the reserved unused field in the frame format is expanded, and the undefined bit or numerical value of the used field in the frame format is expanded, so that a Global Navigation Satellite System (GNSS) is used as a control channel of uplink emission, and the Satellite communication access control is realized for the Satellite uplink emission control. When the satellite communication terminal does not have a special downlink channel for satellite communication, the invention can complete the uplink access control of the communication satellite by means of the broadcast characteristic of the navigation message of the satellite navigation system, effectively control the uplink access emission and realize the dynamic management and the full application of the satellite uplink resources. For communication satellites with large-scale dispersed users, resources can be rapidly allocated, responded and timely controlled, and effective uplink emission control is achieved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic flow chart of a communication satellite access control method based on navigation satellite message extension according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an uplink transmission control application scenario according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating the sub-frame types of the extended B-CNAV1 according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating the type of information in the extended B-CNAV2 according to an embodiment of the present invention;
FIG. 5(A) is a schematic diagram of the page type 1 information layout format of sub-frame 3 of B-CNAV 1;
FIG. 5(B) is a diagram illustrating the page type 2 information layout format of sub-frame 3 of B-CNAV 1;
FIG. 5(C) is a diagram of the layout format of the B-CNAV1 sub-frame 3 page type 3 information;
FIG. 5(D) is a diagram of the layout format of the B-CNAV1 subframe 3 Page type 4 information;
FIG. 6(A) is a diagram of B-CNAV2 information type 30 formatting;
FIG. 6(B) is a diagram of B-CNAV2 information type 31 formatting;
FIG. 6(C) is a schematic diagram of B-CNAV2 information type 32 formatting;
FIG. 6(D) is a diagram of B-CNAV2 information type 33 formatting;
FIG. 6(E) is a diagram of B-CNAV2 message type 34 formatting;
FIG. 6(F) is a schematic diagram of B-CNAV2 information type 40 formatting;
FIG. 7 is a diagram illustrating the reservation status of the IODE field in the extended B-CNAV1/B-CNAV2 according to an embodiment of the present invention;
FIG. 8 is a diagram illustrating the reservation status of the IODC field in the extended B-CNAV1/B-CNAV2 according to an embodiment of the present invention;
FIG. 9 is a diagram illustrating a reservation status of a satellite Health information (Health) field in the extended B-CNAV1/B-CNAV2 according to an embodiment of the present invention;
FIG. 10 is a diagram illustrating the state of reservation of the satellite Health Status (HS) field in the extended B-CNAV1/B-CNAV2 according to an embodiment of the present invention;
FIG. 11 is a schematic structural diagram of a satellite navigation message controlled satellite communication access device according to an embodiment of the present invention;
fig. 12 is a block diagram of a communication satellite access control device based on the navigation satellite text extension according to an embodiment of the present invention.
Detailed Description
First, a flow of a communication satellite access control method based on navigation satellite text extension according to an embodiment of the present invention is described with reference to fig. 1. As shown in fig. 1-2, the method comprises the steps of:
step S101: when uplink resources of a communication satellite are insufficient or meet preset conditions and uplink service needs to be temporarily closed, the communication satellite control center sends an uplink control instruction to a navigation satellite control center; the uplink control instruction is used for indicating the user side to close uplink transmission or reduce the uplink transmission frequency during access operation;
step S102: the navigation satellite control center generates an extended navigation message carrying the uplink control instruction information, broadcasts the extended navigation message to the navigation satellite, and the navigation satellite broadcasts the extended navigation message to a user terminal;
step S103: the navigation satellite broadcasts the extended navigation message to a user side;
step S104: and the user side analyzes the extended navigation message and closes or reduces uplink transmission to the communication satellite according to the instruction requirement.
In this embodiment, the user side is a terminal having a satellite communication function, specifically, the user side is a terminal integrating a satellite communication function, such as an internet of things terminal or a sensor, a mobile phone, and the like, and the user side has a satellite navigation signal receiving and demodulating function. The navigation satellites are global/regional satellite navigation systems such as Beidou, GPS, Glonass, Galileo, quasi-zenith system and the like, and wide area/local area augmentation systems of various space bases/foundations, and each navigation satellite is used for broadcasting a navigation signal with an extended navigation message. The communication satellite is a forwarding satellite or a satellite with onboard processing capacity, can be a mobile communication satellite such as an astronomical communications satellite or maritime affairs, a special C/Ku/Ka frequency band communication satellite for a middle satellite series, can also be a navigation satellite carrying communication loads in a Beidou third-order synchronous orbit and a middle orbit, or other satellites carrying communication loads, and can broadcast beacons or service/control signals downwards.
In this embodiment, the ue does not necessarily have the normal service downlink receiving capability, but is usually equipped with a satellite navigation positioning device in an auxiliary manner. Satellite navigation is a cheap time and space sensor and has the characteristics of all-weather, all-time and large-area broadcasting.
And further, the user side receives the signal of the navigation satellite, demodulates the extended navigation message, and closes uplink transmission or reduces uplink transmission frequency according to the uplink control instruction.
The uplink control instruction can be defined in detail according to communication satellite beams, for example, there are 18 uplink beams for the beidou three-number short message service, and the extended instruction adopts 18 bits to respectively indicate whether the terminal is allowed to transmit uplink service state in the coverage area of each beam. Furthermore, the transmission frequency can be controlled by more bits according to the user level by referring to the frequency control strategy of the existing short message.
The navigation satellite control center broadcasts the extension navigation message to affiliated navigation satellite, navigation satellite broadcasts the extension navigation message to the user side, includes: the navigation satellite control center generates a communication satellite downlink control instruction, and the communication satellite downlink control instruction comprises an extended navigation message carrying an extended type and an uplink control instruction. The extended navigation message is provided with uplink control instruction information, the uplink control instruction information comprises uplink access transmission authority control information, transmission frequency control information and the like of a satellite communication terminal in the coverage area of the navigation satellite, and the control information is arranged according to downlink beams of the communication satellite; the navigation satellite transmits an extended navigation message.
The invention is expanded based on the telegraph text of the Beidou third satellite navigation system. The satellite navigation message mainly plays the roles of broadcasting parameters such as satellite ephemeris, almanac, satellite clock error and integrity, ionospheric correction and the like. The typical information rate of a telegram is only 50bps for improving the reception sensitivity. The extended navigation message still has a large margin except for broadcasting the navigation dedicated information. The invention adopts three methods to expand navigation messages, namely (1) increasing message types to expand message types; (2) expanding by using reserved unused fields in the frame format; (3) the extension is done with undefined bits or values of the fields already used in the frame format. The invention broadcasts uplink control information aiming at other communication satellites based on the three extension methods of the telegraph text.
The generation manner of the extended navigation message carrying the uplink control instruction information is described with reference to fig. 3 to 10. FIGS. 3-4 are diagrams of message type expansion for adding message type; FIGS. 5(A) -6 (F) are extensions with reserved unused fields in the frame format; fig. 7-10 are extended with undefined bits or values of used fields in the frame format.
As shown in fig. 3, the extended navigation message carrying the uplink management and control instruction information is generated in such a manner that the attribute value of the page type field of the extended B-CNAV1 variable subframe 3 is represented by the new extended page type, and the uplink management and control instruction is represented by a plurality of bits in the message information data field of the new page type.
And the expanded text data of the page type represents the uplink control instruction information.
Taking the B-CNAV1 message of the B1C signal of the beidou satellite navigation system as an example, the message is organized in a fixed subframe and a variable subframe mode, and the variable subframe is subframe 3. The first 6 bits of subframe 3 are page types, and the existing definitions are shown in table 1 below.
| PageID (binary) | Page type |
| 000000 | Invalidation |
| 000001 | |
| 000010 | |
| 000011 | |
| 000100 | |
| Others | Reservation |
TABLE 1
As shown in fig. 4, the extended navigation message carrying the uplink management and control instruction information is generated in such a manner that the attribute value of the information type field in the B-CNAV2 is extended, the extended type is represented by the new extended information type, and the uplink management and control instruction information is represented by a plurality of bits in the message information data field of the new extended information type.
As shown in table 2 below, taking the B-CNAV2 message of the B2 signal of the beidou satellite navigation system as an example, the message consists of 6 bits of PRN pseudo code number, 6 bits of information type, 18 bits of second in week, 234 bits of message data and 24 bits of CRC check, wherein the information type can define 63 kinds of information, and only 8 kinds of messages are defined as shown in the table below at present. For each extended information type, for example, 000001 information type 1, a 234-bit text data capacity is available for defining the communication satellite uplink control command.
| MesType (binary system) | Type of information |
| 000000 | Invalidation |
| 001010 | |
| 001011 | Information type 11 |
| 011110 | Information type 30 |
| 011111 | Information type 31 |
| 100000 | Information type 32 |
| 100001 | |
| 100010 | Information type 34 |
| 101000 | Information type 40 |
| Others | Reservation |
TABLE 2
Similar to the Beidou CNAV-2 message, the E5B and E1-B signal I/NAV messages of the Galileo system, the E5a signal F/NAV messages, and the L5 and L2C signal CNAV messages of the GPS system can be extended by the method.
As shown in fig. 5(a) - (D), the extended navigation message carrying the uplink control instruction information is generated by loading the uplink control instruction information in a reserved field of a B-CNAV1 variable subframe 3 page type or a reserved field of a B-CNAV2 information type.
Fig. 5(a) is a B-CNAV1 subframe 3 page type 1 information formatting, fig. 5(B) is a B-CNAV1 subframe 3 page type 2 information formatting, fig. 5(C) is a B-CNAV1 subframe 3 page type 3 information formatting, fig. 5(D) is a B-CNAV1 subframe 3 page type 4 information formatting, and fig. 5(a) - (D) are schematic diagrams of undefined reserved fields of the extended B-CNAV1 variable subframe 3 page type 1/2/3/4 according to the embodiments of the present invention. Variable subframe 3 page type 1 of B-CNAV1 has a reserved field of 27 bits after the time synchronization parameter field; variable subframe 3 page type 2 of B-CNAV1 has a 30-bit reserved field after the reduced almanac field; the variable subframe 3 page type 3 of the B-CNAV1 has a reserved field with 14 bits after the BGTO parameter field; the variable subframe 3 page type 4 of B-CNAV1 has a 47-bit reserved field after the medium precision almanac field. One or more bits in the reserved field can represent the uplink management and control instruction information.
Fig. 6(a) shows B-CNAV2 information type 30 formatting, fig. 6(B) shows B-CNAV2 information type 31 formatting, fig. 6(C) shows B-CNAV2 information type 32 formatting, fig. 6(D) shows B-CNAV2 information type 33 formatting, fig. 6(E) shows B-CNAV2 information type 34 formatting, fig. 6(F) shows B-CNAV2 information type 40 formatting, and fig. 6(a) - (F) show an extended B-CNAV2 information type 30/31/32/33/34/40 format according to an embodiment of the present invention. A 33-bit reserved field is arranged behind the on-satellite equipment group delay TGDB1Cp field of the B-CNAV2 information type 30; there is 8 bits reserved field after the reduced almanac field of the information type 31; there is a 5-bit reserved field behind the EOP parameter field of the information type 32; there is a 16-bit reserved field after the toa field of the information type 33; a 24-bit reserved field is arranged behind the BDT-UTC time synchronization parameter field of the information type 34; the medium precision almanac field of the information type 40 is followed by a 39 bit reserved field. One or more bits in the reserved field can represent the uplink management and control instruction information.
In one possible embodiment, the information for indicating the uplink control instruction is carried in one of the following undefined extensible reserved fields: a reserved field of a B-CNAV1 variable subframe 3 page type 1, a reserved field of a B-CNAV1 variable subframe 3 page type 2, a reserved field of a B-CNAV1 variable subframe 3 page type 3, a reserved field of a B-CNAV1 variable subframe 3 page type 4; reserved fields of B-CNAV2 information type 30, reserved fields of B-CNAV2 information type 31, reserved fields of B-CNAV2 information type 32, reserved fields of B-CNAV2 information type 33, reserved fields of B-CNAV2 information type 34, reserved fields of B-CNAV2 information type 40. And characterizing the uplink control instruction by adopting one or more reserved fields.
In another embodiment, the method for expressing the uplink control command of the communication satellite by the beidou navigation satellite control center based on the undefined and extensible reserved field of the beidou satellite navigation message includes: and generating a navigation message of the extended reserved field, wherein the navigation message of the extended reserved field represents the uplink control instruction. The communication satellite uplink control instruction comprises uplink access transmission authority control information, transmission frequency control information and the like of a satellite communication terminal in the coverage area of the navigation satellite, and the control information is arranged according to downlink wave beams of the communication satellite; the navigation satellite transmits the navigation message defined by the extended reserved field.
The extended navigation message carrying the uplink control instruction information is generated in a manner that the uplink control instruction information is represented based on an undefined bit or value of a used field. The method comprises the following steps: an extended navigation message based on defined fields but without defined bits or values is generated. The uplink access control instruction comprises uplink access transmission authority control information, transmission frequency control information and the like of a satellite communication terminal in the coverage area of the navigation satellite, and the control information is arranged according to downlink beams of the communication satellite; the navigation satellite transmits an extended navigation message using defined fields but no defined bits or values.
As shown in fig. 7, the extended navigation message carrying the uplink management and control instruction information is generated by selecting a plurality of values from undefined reserved values in the IODE field of B-CNAV1 or B-CNAV2, and representing the uplink management and control instruction information with the values.
As shown in fig. 7, the IODE field has 8 bits, and is undefined when the value is 180 to 239, and one or more value states can be selected to represent the communication satellite uplink command information.
FIG. 8 is a diagram illustrating reserved values of IODC field in the extended B-CNAV1/B-CNAV2 according to an embodiment of the present invention. As shown in FIG. 8, the IODC field has 10 bits, and is an undefined value when the 2 bits are 0, and the 8 bits are 180 ~ 239; when the high 2 bit is 1 and the low 8bit is 180-239, the value is undefined; when the high 2 bit is 2 and the low 8bit is 180-239, the value is undefined; the upper 2 bits are 3 and unified into an undefined value. The one or more extensible representations of undefined values may be communication satellite uplink command information.
Fig. 9 is a diagram illustrating reserved values of satellite Health information (Health) fields in the extended B-CNAV1/B-CNAV2 according to an embodiment of the present invention. As shown in FIG. 9, the field contains 8 bits, wherein 32 values represented by bits 5-1 are undefined, and one or more values are selected to represent the communication satellite uplink command information.
Fig. 10 is a diagram illustrating reserved values of satellite Health Status (HS) fields in the extended B-CNAV1/B-CNAV2 according to an embodiment of the present invention. As shown in fig. 10, this field contains 2 bits, where values for HS values 2 and 3 are undefined, and one or more of these values may be selected to characterize the communication satellite up-command information.
In this embodiment, the information of the uplink management and control instruction is carried in one or more of the following states: an IODE field reservation value in B-CNAV1, an IODC field reservation value in B-CNAV1, a satellite Health information (Health) field reservation value in B-CNAV1, a satellite Health State (HS) field reservation value in B-CNAV1, an IODE field reservation value in B-CNAV2, an IODC field reservation value in B-CNAV2, a satellite Health information (Health) field reservation value in B-CNAV2 and a satellite Health State (HS) field reservation value in B-CNAV 2. And adopting one or more of the reserved values to indicate the uplink access control instruction.
Fig. 11 is a schematic structural diagram of a satellite navigation message control satellite communication access device according to an embodiment of the present invention. According to one scheme, the satellite communication and satellite navigation functions are completed by connecting two separated function modules with independent antennas respectively, and the two function modules are connected with a main control CPU. The satellite navigation module sends the received information such as the extended navigation message, positioning, time, visible satellite parameters and the like to the main control CPU, the main control CPU completes analysis of an uplink control instruction and sends a corresponding control instruction to the satellite communication module, for example, the transmission is closed, the transmission frequency is reduced and the like. If the satellite communication frequency band is close to the satellite navigation frequency band, a single broadband antenna and a switch assembly can be used for simultaneously processing satellite communication signals and satellite navigation signals, and the master control CPU realizes the dispatching of satellite communication signal receiving and sending and navigation signal receiving through controlling the switch.
An embodiment of the present invention further provides a communication satellite access control device based on navigation satellite text extension, as shown in fig. 12, the device includes:
an uplink control instruction generation module: the method comprises the steps that when uplink resources of a communication satellite are insufficient or meet preset conditions and uplink service needs to be closed temporarily, the communication satellite control center sends an uplink control instruction to a navigation satellite control center; the uplink control instruction is used for indicating the user side to close uplink transmission or reduce the uplink transmission frequency during access operation;
the extended navigation message generation module: configuring the navigation satellite control center to generate an extended navigation message carrying the uplink control instruction information, broadcasting the extended navigation message to the navigation satellite, and broadcasting the extended navigation message to a user terminal by the navigation satellite;
the extended navigation message broadcasting module comprises: configuring the navigation satellite to broadcast the extended navigation message to a user terminal;
a user response module: and the configuration is that the user terminal analyzes the extended navigation message and closes or reduces uplink transmission to the communication satellite according to the instruction requirement.
The embodiment of the invention further provides a communication satellite access control system based on navigation satellite message extension, which comprises:
a processor for executing a plurality of instructions;
a memory to store a plurality of instructions;
wherein the instructions are used for being stored by the memory and loaded and executed by the processor to implement the communication satellite access control method based on the navigation satellite message extension.
The embodiment of the invention further provides a computer readable storage medium, wherein a plurality of instructions are stored in the storage medium; the plurality of instructions are used for loading and executing the communication satellite access control method based on the navigation satellite message extension by the processor.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are still within the scope of the technical solution of the present invention.
Claims (8)
1. A communication satellite access control method based on navigation satellite message extension is characterized by comprising the following steps:
step S101: when uplink resources of a communication satellite are insufficient or meet preset conditions and uplink service needs to be temporarily closed, the communication satellite control center sends an uplink control instruction to a navigation satellite control center; the uplink control instruction is used for indicating the user side to close uplink transmission or reduce the uplink transmission frequency during access operation;
step S102: the navigation satellite control center generates an extended navigation message carrying the uplink control instruction information, broadcasts the extended navigation message to the navigation satellite, and the navigation satellite broadcasts the extended navigation message to a user terminal;
step S103: the navigation satellite broadcasts the extended navigation message to a user side;
step S104: and the user side analyzes the extended navigation message and closes or reduces uplink transmission to the communication satellite according to the instruction requirement.
2. The communication satellite access control method based on the navigation satellite text extension according to claim 1, wherein the extended navigation text carrying the uplink management and control instruction information is generated in such a manner that an attribute value of a page type field of an extended B-CNAV1 variable subframe 3 is used, an extended type is represented by an extended new page type, and the uplink management and control instruction is represented by a plurality of bits in a text information data field of the new page type; or the attribute value of the information type field in the extended B-CNAV2, the extended type being characterized by the new information type, the uplink management and control instruction information being characterized by a number of bits in the message information data field of the new information type.
3. The method according to claim 1, wherein the extended navigation message carrying the uplink management control command information is generated by loading the uplink management control command information in a reserved field of B-CNAV1 variable subframe 3 page type or a reserved field of B-CNAV2 information type.
4. The navigation satellite text extension-based communication satellite access control method of claim 1, wherein the uplink management command information is characterized based on an undefined bit or value of a used field.
5. The NAV extension-based communication satellite access control method of claim 4, wherein the information of the uplink control command is carried in one or more of the following states: an IODE field reservation value in B-CNAV1, an IODC field reservation value in B-CNAV1, a satellite Health information (Health) field reservation value in B-CNAV1, a satellite Health State (HS) field reservation value in B-CNAV1, an IODE field reservation value in B-CNAV2, an IODC field reservation value in B-CNAV2, a satellite Health information (Health) field reservation value in B-CNAV2 and a satellite Health State (HS) field reservation value in B-CNAV 2.
6. A communication satellite access control apparatus based on navigation satellite text extension, the apparatus comprising:
an uplink control instruction generation module: the method comprises the steps that when uplink resources of a communication satellite are insufficient or meet preset conditions and uplink service needs to be closed temporarily, the communication satellite control center sends an uplink control instruction to a navigation satellite control center; the uplink control instruction is used for indicating the user side to close uplink transmission or reduce the uplink transmission frequency during access operation;
the extended navigation message generation module: configuring the navigation satellite control center to generate an extended navigation message carrying the uplink control instruction information, broadcasting the extended navigation message to the navigation satellite, and broadcasting the extended navigation message to a user terminal by the navigation satellite;
the extended navigation message broadcasting module comprises: configuring the navigation satellite to broadcast the extended navigation message to a user terminal;
a user response module: and the configuration is that the user terminal analyzes the extended navigation message and closes or reduces uplink transmission to the communication satellite according to the instruction requirement.
7. A communication satellite access control system based on navigation satellite text extensions, comprising:
a processor for executing a plurality of instructions;
a memory to store a plurality of instructions;
wherein the instructions are stored by the memory and loaded by the processor to execute the method for controlling access to a communication satellite based on the extensions to the navigation satellite text according to any one of claims 1 to 5.
8. A computer-readable storage medium having stored therein a plurality of instructions; the instructions for loading and executing the method for controlling access to a communication satellite based on the extensions to the navigation satellite text by a processor according to any one of claims 1 to 5.
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