CN110730029B - Multi-mode wireless satellite communication terminal, system and communication method - Google Patents
Multi-mode wireless satellite communication terminal, system and communication method Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- 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
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18517—Transmission equipment in earth stations
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- H04W16/10—Dynamic resource partitioning
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/10—Access point devices adapted for operation in multiple networks, e.g. multi-mode access points
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Abstract
本发明公开一种多模无线卫星通信终端，集成FDMA和TDMA通信模块以及综合管理模块，并通过综合管理模块内嵌WIFI和LORA单元的方式，实现用户无线终端的无线接入，并经由卫星通信信关站实现各类通信应用。进一步的，本发明还公开与该终端相应的用户终端、通信方法，以及多模无线卫星通信系统。本发明能够根据通信业务类型实现FDMA和TDMA两种卫星通信体制和传输方式的无感切换，同时支持卫星地球站用户的无线接入，进而灵活便捷的实现人机交互和通信服务应用，大大提升用户使用体验。
The present invention discloses a multi-mode wireless satellite communication terminal, which integrates FDMA and TDMA communication modules and an integrated management module, and realizes wireless access of user wireless terminals by embedding WIFI and LORA units in the integrated management module, and realizes various communication applications through a satellite communication gateway. Furthermore, the present invention also discloses a user terminal, a communication method, and a multi-mode wireless satellite communication system corresponding to the terminal. The present invention can realize seamless switching of FDMA and TDMA satellite communication systems and transmission modes according to the type of communication service, and support wireless access of satellite earth station users at the same time, thereby flexibly and conveniently realizing human-computer interaction and communication service applications, greatly improving the user experience.
Description
Technical Field
The application belongs to the field of satellite communication application, and particularly relates to a satellite multimode communication system and an area user wireless access technology.
Background
With the continuous progress and expansion of satellite communication related technologies and business applications, satellite communication is increasingly widely applied to various industries and fields, in particular to military communication, news interview, geological exploration, earthquake relief, forest fire prevention and other industrial applications, consumer communication applications and the like.
At present, the satellite communication system mainly adopts FDMA and TDMA, the FDMA system is generally used for satellite communication systems with fewer earth stations and larger communication capacity, networking is flexible, the system is suitable for special line communication guarantee, but due to the fact that multi-carrier working exists, the satellite frequency resource utilization rate of the system is lower, the TDMA system is generally used for satellite communication systems with more earth stations, networking is complex, use is flexible, the system is suitable for daily communication, no multi-carrier working exists, and the satellite resource utilization rate is higher. In order to better meet different application occasions, the communication system needs to be flexibly switched according to practical application, so that the high-efficiency utilization of satellite resources by daily communication and emergency private network guarantee, real-time communication and non-real-time communication is realized.
Meanwhile, the user terminal equipment corresponding to the satellite earth station at the present stage is mainly accessed in a wired mode, such as a wired telephone, a computer, audio and video equipment and the like, and is relatively complex to operate, use and maintain. In order to adapt to popularization and application of modern user communication terminals, a wireless user terminal (such as a wireless product based on android, IOS and Windows systems) which is universal in the market is used, and interaction between a user and a earth station and application are realized in a wireless access mode, so that the use experience of the user can be greatly improved.
The invention patent with publication number CN105634993A discloses a satellite communication self-adaptive transmission method based on service driving, which effectively combines the advantages of two types of resources, namely time domain and frequency domain, in service transmission, introduces the capability of service driving into a system, establishes a resource allocation mechanism based on service characteristics, and realizes the self-adaptive conversion capability of the system. However, the patent focuses on the implementation of an application mode, namely the overall system architecture and the corresponding terminal application, is a general consideration on the system and equipment level, and focuses on the implementation of a system design, and is only suitable for newly built satellite communication systems.
Disclosure of Invention
In order to improve the flexibility of a satellite communication earth station of a user in a communication system, a user access mode and an application mode, the invention provides a multimode wireless satellite communication terminal, a multimode wireless satellite communication system and a multimode wireless satellite communication system corresponding method, which can realize the noninductive switching of two satellite communication systems and transmission modes of FDMA and TDMA according to communication service types, and simultaneously support the wireless access of the satellite earth station user, thereby flexibly and conveniently realizing man-machine interaction and communication service application and greatly improving the user experience.
In order to achieve the above purpose, the invention integrates core modules such as FDMA and TDMA communication modules, a comprehensive management module and the like, and realizes wireless access of wireless terminals (mobile phones, PAD, PC and the like) of users by embedding WIFI (Route mode) and LORA (AP mode) wireless communication units into the comprehensive management module, and realizes various communication applications through satellite communication gateway stations. Compared with the prior art, the invention mainly improves the following three aspects of service type identification and transmission mode selection, 2) wireless access of a user of the earth station and 3) APP application mode.
The invention is different from the invention (CN 105634993A) in that the invention only carries out initial discrimination on the service type and selects the corresponding transmission mode, the communication process no longer carries out switching of the transmission mode, and the communication time slot is adjusted by the satellite communication gateway station in real time according to the change of the communication rate only when the TDMA transmission system is adopted, so as to improve the flexibility of resource use. The method has the advantages of being directly applicable to the existing satellite communication system, needing no software and hardware modification, being simpler in implementation mode and lower in cost.
The invention adopts a WIFI and LORA wireless access mode to replace a traditional wired mode to access a user service terminal, so that a user of an earth station can conveniently use equipment with wireless access capability such as a common mobile phone, a PAD or a PC to realize various communication services, particularly, the LORA wireless communication mode based on the Internet of things technology is introduced, the wireless access range of the user can reach 15km at most, meanwhile, the LORA and the WIFI can be matched to comprehensively utilize the advantages of the two wireless access modes, the WIFI provides high-speed transmission service for a close-range user, and the LORA provides a low-speed stable and reliable transmission link for a long distance.
The multimode communication APP can provide a simple, convenient, easy-to-use and friendly man-machine interaction interface for the user, and is convenient for the user to realize equipment state management and use of various communication services.
The specific technical scheme of the invention is as follows:
The multimode wireless satellite communication terminal comprises a communication module, a comprehensive management module, an intermediate frequency power distribution module and a power management module, wherein the communication module comprises an FDMA communication module and a TDMA communication module, and the comprehensive management module is configured with a WIFI unit and a LORA unit;
The communication module is configured to realize the sending of local service information and the receiving of opposite-end service information through the intermediate-frequency power distribution module, and to encode, modulate or demodulate and decode the service information, wherein the service information comprises an IP mark for indicating the service type to which the service information belongs;
The WIFI unit adopts a routing mode, the LORA unit adopts a hot spot mode, and the WIFI unit provides information interaction with the communication module for WIFI and LORA users.
The FDMA communication module is mainly responsible for carrier communication of SCPC/DAMA transmission signals, and the TDMA communication module is mainly responsible for carrier communication of TDM/TDMA transmission signals.
The multimode wireless satellite communication terminal also comprises an interface unit, wherein the interface unit is connected with the WIFI unit through a network interface, the FDMA and TDMA communication modules are used for indicating working states through the interface unit, and the interface unit is further used for providing information interaction between a wired terminal user and the communication modules.
The multimode wireless satellite communication terminal also comprises a power management module, wherein the power management module receives external power and supplies power to the FDMA communication module, the TDMA communication module, the WIFI unit and the LORA unit after DC/DC conversion.
As a preferred solution, the multimode wireless satellite communication terminal further comprises an antenna and a radio frequency device connected to the intermediate frequency power distribution module.
The second scheme is that the user terminal comprises a processor and a memory, and is characterized by being further provided with a LORA access module, a WIFI access module and a plurality of service modules for realizing voice, short message and video functions, wherein the memory stores a multimode communication program, and when the multimode communication program is run by the processor, the multimode communication program executes the following instructions:
responding to user operation, generating corresponding control information or service information, carrying out IP marking on the information, marking the service type of the information, and then transmitting the information through a wireless communication link;
Or receiving service information sent by the opposite terminal, identifying according to the IP mark contained in the service information, and distributing to the corresponding service module.
The multimode wireless satellite communication system is characterized by comprising a communication satellite, a satellite communication gateway station, a ground communication network, a user terminal and a satellite communication earth station provided with the multimode wireless satellite communication terminal, wherein the multimode wireless satellite communication terminal has the characteristics of the scheme I, and the user terminal has the characteristics of the scheme II.
A fourth aspect of the present invention is a communication method applied to the multimode wireless satellite communication terminal according to the first aspect, including:
The method comprises the steps of receiving service information sent by a local user terminal through WIFI and LORA through a LORA unit or a WIFI unit, broadcasting the service information through the WIFI unit, receiving the service information of corresponding service types by an FDMA communication module or a TDMA communication module and carrying out carrier communication on the service information, and finally sending the service information to an opposite terminal through an intermediate frequency power distribution module;
The FDMA communication module or the TDMA communication module receives the service information of the corresponding service type and carries out carrier communication on the service information, and the service information is sent to the local user terminal through the WIFI unit or is sent to the LORA unit after being forwarded to the local user terminal through the WIFI unit.
The carrier communication is carried out by the FDMA communication module when the service type of the service information is voice, short message and video information, and the communication is carried out by the TDMA communication module when the service type of the service information is data access.
As a preferred solution, the IP tag is a frame tag.
The FDMA communication module receives the service information sent by the local user terminal, reports the application of communication demand comprising opposite end identity information, service type and service rate to the network management center, and carries out carrier communication according to the frequency domain resources distributed by the network management center, and the TDMA communication module receives the service information sent by the local user terminal and carries out carrier communication according to the communication time slots pre-distributed by the network management center.
As a preferred solution, the TDMA communication module performs carrier communication according to a communication time slot pre-allocated by the network management center, and requests dynamic adjustment of time slot allocation to the network management center when the service rate requirement increases, so as to obtain a suitable communication time slot.
The invention has the following beneficial effects:
(1) The invention is suitable for newly built satellite communication systems and is also suitable for improving the capacity of the existing satellite communication systems, the existing network management architecture and strategy are not required to be changed, and the invention is not limited by an installation platform and a use occasion, and can be widely applied to task platforms such as airborne, shipborne, vehicle-mounted, single person carrying and defending and communication equipment and the like.
(2) The method can switch proper satellite communication system and transmission mode according to communication service type without sense, has both daily communication and private network communication guarantee, can improve the utilization efficiency of system satellite resources, reduce the investment of operators, and can improve the use experience of users.
(3) The device state management and service application can be carried out through the APP on the wireless terminal such as the mobile phone, the PAD, the portable computer and the like, and the method is simple, convenient and easy to use.
(4) The wireless access mode can also reduce equipment accessory composition, enhance the use flexibility and convenience, improve the access distance and coverage range of users, and increase the reliability and maintainability of equipment.
Drawings
FIG. 1 is a schematic diagram of the connection of functional modules within a multimode wireless satellite communication terminal;
FIG. 2 is a schematic diagram of program elements of a multimode communication APP;
FIG. 3 is a schematic diagram of a multimode communication APP application;
FIG. 4 is a schematic diagram of a signal transmission flow of a multimode wireless satellite communication terminal;
FIG. 5 is a schematic diagram of a received signal flow of a multimode wireless satellite communication terminal;
Fig. 6 is a schematic diagram of the components of a multimode wireless satellite communication system.
Detailed Description
The technical scheme of the invention is described in detail below with reference to the accompanying drawings and the specific embodiments.
As shown in fig. 1, embodiment 1 discloses a multimode wireless satellite communication terminal applicable to FDMA/TDMA multimode satellite communication systems or existing FDMA or TDMA satellite communication systems, which is mainly composed of an FDMA communication module, a TDMA communication module, an intermediate frequency power distribution module, a power management module and an integrated management module. The FDMA communication module is mainly responsible for signal coding-modulation-sending and receiving-demodulating-decoding in an SCPC/DAMA transmission mode, frequency division multiple access mode is adopted to conduct user distinction, the TDMA communication module is mainly responsible for coding-modulation-sending and receiving-demodulating-decoding in a TDM/TDMA transmission mode, time division multiple access mode is adopted to conduct user distinction, the intermediate frequency power distribution module is mainly used for sending and receiving satellite intermediate frequency signals, the FDMA communication module and the TDMA communication module are connected with an antenna and radio frequency equipment of a satellite communication earth station through the intermediate frequency power distribution module, receiving and sending the satellite intermediate frequency signals are further achieved, the power management module receives external power supply, power is supplied to the FDMA communication module, the TDMA communication module and an embedded functional unit in the comprehensive management module after DC/DC conversion, the comprehensive management module is embedded with a WIFI unit, the LORA unit and an interface unit, and is an integrated module, wherein the WIFI unit is in a routing mode (Route mode), is responsible for receiving and sending spatial WIFI wireless signals, the LORA unit is in a hot spot mode (AP mode), but is in the inside the satellite communication terminal, and the WIFI information is provided for the WIFI information to the user interaction module through the WIFI and the LORA unit.
In the multimode wireless satellite communication terminal, an FDMA communication module, a TDMA communication module and a LORA unit are connected with a WIFI unit through a network interface to realize IP data exchange, the FDMA communication module and the TDMA communication module are also connected with an interface unit through the WIFI unit, and the WIFI unit is connected with the interface unit through the network interface to provide a wired data interface for a user. The wireless satellite communication terminal comprises a WIFI unit, a wireless communication module (FDMA) and a multimode wireless satellite communication terminal, wherein the LORA unit is connected to a Local Area Network (LAN) port of the WIFI unit, the FDMA communication module is connected to the LAN port of the WIFI unit, a service and management network port of the TMDA communication module is respectively connected to a Wide Area Network (WAN) port and a LAN port of the WIFI unit, an external LAN port of the multimode wireless satellite communication terminal is connected to the LAN port of the WIFI unit, and meanwhile, working state instructions of the FDMA and the TDMA communication modules are led to the outside of the multimode wireless satellite communication terminal through an interface unit, so that a user can observe the working state of the multimode wireless satellite communication terminal conveniently.
As shown in fig. 2 and fig. 3, embodiment 2 discloses a multimode communication APP (abbreviated as "APP") installed in a user terminal, and the functional module mainly includes a data interface unit, a man-machine interaction unit, a service data processing unit, and a management data processing unit. The service data processing unit is used for frame processing of the service information (for example, distinguishing service types and determining service data flow direction FDMA or TDMA), and exchanging information with the multimode wireless satellite communication terminal and the man-machine interaction unit through the data interface unit. The data interface unit is used for sending and receiving control information and service information to the multimode wireless satellite communication terminal through a WIFI or LORA link and is used for interacting information with the interpersonal interaction unit, and the management data processing unit is used for processing frames of the control information sent by the man-machine interaction unit and sending instructions to the multimode wireless satellite communication terminal through the data interface unit. The LORA access module can be obtained by adopting a random standard or independent purchasing mode, and can increase the capability of the user terminal of being free from a LORA hot spot by being connected with a user terminal data interface (USB or a common mobile phone data interface), and meanwhile, the module can be directly embedded into the user terminal according to the user customization requirement.
As shown in FIG. 4, when the subscriber of the earth station calls, the multimode communication APP installed on the subscriber terminal is operated according to the service requirement to perform service communication, the multimode communication APP performs frame processing on service information according to the service type, the processed data is transmitted to the WIFI unit inside the multimode wireless satellite communication terminal through the wireless link (WIFI or LORA link), at this time, voice, short message and video information are received and encoded and modulated by the FDMA communication module by using the frame marks of different service types, the data information is received and encoded and modulated by the TDMA communication module, and finally the data information is sent out by the intermediate frequency power distribution module.
As shown in fig. 5, when called party or receiving service information, the FDMA communication module and the TMDA communication module receive the service information sent from the opposite end through the intermediate frequency power distribution module, and then transmit the service information to the WIFI unit in a centralized manner, and then transmit the service information to the user terminal through the WIFI unit or the LORA unit via the wireless link, where the multimode communication APP of the user terminal identifies according to the frame mark included in the service information and distributes the service information to the service module corresponding to voice, short message, video or data access.
It should be noted that the service types are distinguished based on symmetric and asymmetric communication, where voice and short message video services are symmetric communication, and data access, including uploading and downloading of data, are asymmetric communication.
As shown in fig. 6, embodiment 3 discloses a multimode wireless satellite communication system (abbreviated as "the system"), taking FDMA/TDMA multimode satellite communication system as an example, the system includes a communication satellite, a satellite communication earth station (including an antenna and a radio frequency device) equipped with multimode wireless satellite communication terminals, a user terminal, a satellite communication gateway station, and a ground communication network.
The satellite communication earth station mainly comprises an antenna, equipment radio frequency, a multimode wireless satellite communication terminal and related matched equipment, and is mainly used for satellite signal receiving and transmitting, service information processing and user access, and provides a data transmission channel and communication service for users.
The user terminal is a wireless communication terminal commonly used in the market, such as a smart phone, a PAD, a computer with WIFI function, and the like. The user terminal can be connected with the multimode wireless satellite communication terminal by using the built-in WIFI, can also be connected with the multimode wireless satellite communication terminal by using the special LORA access module, and can realize various applications by preassembling the special multimode communication APP.
The satellite communication gateway station mainly comprises an antenna, radio frequency equipment, network management equipment (i.e. a network management center) and service relay equipment, and is used for realizing functions of network management, service processing and the like. The network management function is mainly used for managing satellite resources, earth stations and communication of the system and providing networking and resource support for the earth stations, and the service processing function is mainly used for providing interconnection and intercommunication between remote satellite earth station users and users of a ground communication network and providing information access, interaction and forwarding so as to realize communication service among users.
The ground communication network mainly includes PSTN (public switched telephone network), PLMN (public land mobile network), internet (Internet), and private communication networks such as military telephone automatic network and enterprise data private network.
In the system, a satellite communication earth station provided with a multimode wireless satellite communication terminal is connected to a ground communication network by means of a communication satellite, a space link (satellite link) and a satellite communication gateway station, and a user can use wireless communication equipment such as a mobile phone, PAD and the like to access the multimode wireless satellite communication terminal and then access the ground communication network through the satellite communication gateway station to realize various service applications. When the wireless satellite communication system is applied, the multimode wireless satellite communication terminal is powered on to access the network, a user accesses and initiates service demands by using wireless communication equipment such as a mobile phone and the like in a WIFI or LORA mode, and the satellite communication gateway station provides a space link for the satellite communication gateway station after receiving the communication demands of the earth station and provides data exchange with a ground communication network. The antenna and the radio frequency device may be integrally designed with the multimode wireless satellite communication terminal.
The multimode wireless satellite communication terminal integrates core modules such as FDMA and TDMA communication modules, a comprehensive management module and the like, realizes wireless access of a user wireless terminal in a mode of a WIFI and LORA wireless module embedded in the comprehensive management module, and realizes various communication applications through a satellite communication gateway station. The multimode wireless satellite communication terminal described in embodiment 1 can be specifically used.
Embodiment 4 discloses a multimode wireless satellite communication method based on the multimode wireless satellite communication system described in embodiment 3, mainly comprising the following steps:
S1, after the multimode wireless satellite communication terminal is powered on, the TDM signals issued by the network management center are automatically searched according to preset parameters, and network access is completed.
And S12, the earth station user searches wireless signals of the multimode wireless satellite communication terminal on the user terminal (external connection or built-in LORA access module), and selects to access the multimode wireless satellite communication terminal through a WIFI or LORA mode according to requirements or signal strength. The WIFI coverage radius is about 50 meters, and the method is mainly suitable for high-speed service when the user terminal is close to the earth station, and the LORA coverage radius can reach 15km at the most, and is mainly suitable for low-speed service when the user terminal is far away from the earth station.
S13, when the earth station user performs service call and communication through the multimode communication APP man-machine interaction interface of the user terminal, the management data processing unit and the service data processing unit of the APP process frames of the called number, the service rate and the service information, and the APP data interface unit sends the frames to the WIFI unit of the multimode wireless satellite communication terminal through the WIFI or LORA wireless link. The data after frame processing reaches the WIFI unit and then is broadcasted to each unit module, and each unit module selectively processes or discards the data according to the frame header identification. It should be noted that, the WIFI unit is used for data exchange, and when in wireless or wired connection, each unit module in the multimode wireless satellite communication terminal except the power supply and intermediate frequency power distribution unit is connected to the unit for data exchange.
The method comprises the steps that a user initiates a service call through an APP man-machine interaction unit, for example, the service type is voice, short message, data transmission (also called data access) and real-time video service, a management data processing unit carries out frame processing on control information such as a called number, the service type and communication rate of the call, the control information is sent to a WIFI unit of a multimode wireless satellite communication terminal through a wireless link by a data interface unit, the WIFI unit broadcasts the control information, other modules except the FDMA communication module discard the information, the FDMA communication module acquires the information and then establishes a satellite communication link with an opposite earth station according to the called number and the communication rate contained in the FDMA communication module, after the link is established successfully, the FDMA communication module sends the link state to the APP, at the moment, the user can carry out service communication, and when the service communication is carried out, voice, short message, data and video information of the user are subjected to frame processing by the APP service data processing unit and are sent to a WIFI unit of the multimode wireless satellite communication terminal through a wireless link, the WIFI unit broadcasts the service information except the FDMA communication module, and the other modules discard the information, the FDMA communication module acquire the information, and then sends the service information to the opposite earth station to the communication station.
If the service type is data access, the service data frame is directly processed, the APP service data processing unit is used for processing the service data frame and transmitting the service data to a WIFI unit of the multimode wireless satellite communication terminal through a wireless link by a data interface unit, the WIFI unit broadcasts the service information, other modules except the TDMA communication module discard the information, and the TDMA communication module acquires the information and then transmits the information to an opposite-end earth station to realize service communication.
The specific mode of the network management center distributing Frequency Domain (FDMA) resources is that after the FDMA communication module receives service information forwarded by the intermediate frequency power distribution module, the FDMA communication module reports a communication demand application comprising the number of the opposite party, the service type and the service rate to the network management center through a TDM channel, the receiving network management center distributes receiving and transmitting frequency points for the two communication parties according to the type and the rate of the communication service, then modulates the service information, connects the modulation of the corresponding frequency points and sends the modulation to radio frequency equipment, and the opposite end demodulates on corresponding frequency point carriers.
The TDMA communication module sends service information on a time slot pre-allocated by the network management center, if the service rate requirement is increased, the network management center can dynamically adjust the time slot allocation according to the QoS requirement, allocate more communication time slots for the TDMA communication module of the corresponding earth station, and improve the communication capability of the TDMA communication module.
Therefore, the flexible application of FDMA and TDMA systems, wireless access and application of users can be realized through the flow, and further the communication service application of local and opposite end users is realized.
Besides the WIFI and LORA wireless modes, the multimode wireless satellite communication terminal can also simultaneously reserve physical interfaces of telephone, data and other services, and has the capability of providing services for wired terminal users, namely the user terminal can also be a wired terminal, such as a two-wire telephone, a computer and the like, and can be connected with a network cable through a telephone cable when in use.
In summary, through the integral consideration and the integral design, the multimode wireless satellite communication terminal can provide a double-communication transmission system and a noninductive switching experience for users, a proper communication transmission mode can be selected according to a strategy of the system design without user intervention, different communication requirements and application occasions can be adapted, the satellite resource utilization rate is effectively improved, through the introduction of an integrated WIFI (wireless fidelity), particularly a LORA (local area network) wireless access mode, the flexibility of service terminal arrangement and use is greatly improved, the service range of an earth station is improved, and therefore the service capability of near-distance high-speed communication and long-distance reliable communication is realized. The invention can be applied to newly built satellite communication systems, and can be conveniently updated and modified by newly building or adding the satellite communication system into various existing satellite communication earth stations under the condition of not changing the existing satellite communication systems.
Finally, it should be noted that while the above describes embodiments of the invention in terms of drawings, the present invention is not limited to the above-described embodiments and fields of application, which are illustrative, instructive, and not limiting. Those skilled in the art, having the benefit of this disclosure, may effect numerous forms of the invention without departing from the scope of the invention as claimed.
Claims (9)
1. The multimode wireless satellite communication terminal is characterized by comprising a communication module, a comprehensive management module, an intermediate frequency power distribution module and a power management module, wherein the communication module comprises an FDMA communication module and a TDMA communication module, and the comprehensive management module is configured with a WIFI unit and a LORA unit;
The communication module is configured to realize the sending of local service information and the receiving of opposite-end service information through the intermediate-frequency power distribution module, and to encode, modulate or demodulate and decode the service information, wherein the service information comprises an IP mark for indicating the service type to which the service information belongs;
the WIFI unit adopts a routing mode, the LORA unit adopts a hot spot mode, and the WIFI unit provides information interaction with the communication module for WIFI and LORA users.
2. The multimode wireless satellite communication terminal of claim 1, further comprising an interface unit, wherein the interface unit is connected to the WIFI unit through a network interface, wherein the FDMA communication module and the TDMA communication module are configured to implement an indication of an operating state through the interface unit, and wherein the interface unit is further configured to provide information interaction between a wired terminal user and the communication module.
3. The multimode wireless satellite communication terminal of claim 1, further comprising a power management module, wherein the power management module receives external power and provides power to the FDMA communication module, the TDMA communication module, the WIFI unit and the LORA unit after DC/DC conversion.
4. A multimode wireless satellite communication system comprising a communication satellite, a satellite communication gateway station, a terrestrial communication network, a user terminal, and a satellite communication earth station configured with a multimode wireless satellite communication terminal, the multimode wireless satellite communication terminal having the features of any one of claims 1 to 3, the user terminal comprising a processor and a memory, further configured with a LORA access module, a WIFI access module, and a plurality of service modules for implementing voice, short message, and video functions, the memory having stored therein a multimode communication program that, when executed by the processor, performs the following instructions:
responding to user operation, generating corresponding control information or service information, carrying out IP marking on the information, marking the service type of the information, and then transmitting the information through a wireless communication link;
Or receiving service information sent by the opposite terminal, identifying according to the IP mark contained in the service information, and distributing to the corresponding service module.
5. A communication method, characterized by being applied to the multimode wireless satellite communication terminal of any one of claims 1 to 3, comprising:
receiving service information sent by a local user terminal through WIFI and LORA through the LORA unit or the WIFI unit;
The FDMA communication module or the TDMA communication module receives the business information of the corresponding business type and carries out carrier communication on the business information;
The FDMA communication module or the TDMA communication module receives the service information of the corresponding service type and carries out carrier communication on the service information, and the service information is sent to the local user terminal through the WIFI unit or is sent to the LORA unit after being forwarded to the local user terminal through the WIFI unit.
6. The communication method of claim 5, wherein the service types include voice, short message, and video information, and data access, wherein carrier communication is performed by the FDMA communication module when the service types of the service information are voice, short message, and video information, and wherein communication is performed by the TDMA communication module when the service types of the service information are data access.
7. The communication method of claim 5, wherein the IP tag is a frame tag.
8. The communication method according to claim 5, wherein after receiving the service information sent by the local user terminal, the FDMA communication module reports a communication request including the opposite end identity information, the service type and the service rate to the network management center and performs carrier communication according to the frequency domain resources allocated by the network management center, and after receiving the service information sent by the local user terminal, the TDMA communication module performs carrier communication according to the communication time slots pre-allocated by the network management center.
9. The communication method according to claim 8, wherein the TDMA communication module performs carrier communication according to a communication time slot pre-allocated by the network management center, and requests dynamic adjustment of time slot allocation to the network management center to obtain a suitable communication time slot when a traffic rate demand increases.
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| CN112004185B (en) * | 2020-08-11 | 2022-10-14 | 中电海康集团有限公司 | Dual-mode communication base station and Bluetooth positioning system |
| CN112333059A (en) * | 2020-10-19 | 2021-02-05 | 广东电网有限责任公司 | Data transmission device and method |
| CN112787706B (en) * | 2020-12-30 | 2022-08-16 | 南京天际易达通信技术有限公司 | Marine environment monitoring satellite transmission system based on multi-mode fusion |
| CN113078936B (en) * | 2021-03-19 | 2023-04-21 | 四川航天神坤科技有限公司 | Satellite communication system and method of FDMA system |
| CN114598376B (en) * | 2022-02-14 | 2024-05-07 | 南京控维通信科技有限公司 | Fusion system for satellite network management and satellite measurement and control, application method thereof and deployment method thereof |
| CN116056145B (en) * | 2023-03-06 | 2023-07-11 | 南京融星智联信息技术有限公司 | Universal multimode network bridge for satellite communication and communication method |
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