CN210958368U - Multimode wireless satellite communication terminal and system - Google Patents

Abstract

The utility model discloses a multimode wireless satellite communication terminal, integrated FDMA and TDMA communication module and integrated management module to through the mode of the embedded WIFI of integrated management module and LORA unit, realize user wireless terminal's wireless access, and realize all kinds of communication applications via satellite communication gateway station. The multimode wireless satellite communication terminal can realize the non-inductive switching between two satellite communication systems of FDMA and TDMA and a transmission mode according to the communication service type, simultaneously supports the wireless access of a satellite earth station user, and further flexibly and conveniently realizes man-machine interaction and communication service application, thereby greatly improving the user experience.

Description

Multimode wireless satellite communication terminal and system

Technical Field

The application belongs to the field of satellite communication application, and particularly relates to a satellite multimode communication system and a regional user wireless access technology.

Background

With continuous progress and expansion of satellite communication related technologies and business applications, satellite communication is more and more widely applied to various industries and fields, in particular to military communication, news interview, geological exploration, earthquake relief, forest fire prevention and other industries, consumer communication and the like.

At present, a satellite communication system mainly adopts FDMA and TDMA, the FDMA system is generally used for a satellite communication system with less earth stations and larger communication capacity, the networking is flexible, and the system is suitable for special line communication guarantee, but because of the condition of multi-carrier work, the satellite frequency resource utilization rate of the system is lower; the TDMA system is generally used for satellite communication systems with a large number of earth stations, is complex in networking, but flexible in use, suitable for daily communication, free of multi-carrier work and high in satellite resource utilization rate. In order to better meet different application occasions, communication systems need to be flexibly switched according to practical application so as to realize efficient utilization of satellite resources by daily communication, emergency private network guarantee, real-time communication and non-real-time communication.

Meanwhile, at present, user terminal equipment corresponding to the satellite earth station is mainly accessed in a wired mode, such as wired telephones, computers, audio/video equipment and the like, and is relatively complex to operate, use and maintain. In order to adapt to popularization and application of a modern user communication terminal, a general wireless user terminal (such as a wireless product based on an android system, an IOS system and a Windows system) in the market is used, and the user experience of the user can be greatly improved by adopting a wireless access mode to realize interaction and application between the user and an earth station.

The invention patent with publication number CN105634993A, entitled "service-driven-based satellite communication adaptive transmission method", effectively combines the advantages of two types of resources, namely time domain and frequency domain, in service transmission, introduces service-driven capability into a system, establishes a resource allocation mechanism based on service characteristics, and realizes adaptive conversion capability of the system. However, the patent focuses on the implementation of an application mode, which is based on the whole system architecture and the corresponding terminal application, and is a general consideration in the system and equipment level, and focuses more on an application mode implemented by the system design, and is only suitable for newly-built satellite communication systems.

SUMMERY OF THE UTILITY MODEL

For promoting the flexibility of user satellite communication earth station on communication system, user access mode and application, the utility model provides a multimode wireless satellite communication terminal can realize FDMA and two kinds of satellite communication systems of TDMA and transmission mode's noninductive switching according to the communication service type, supports satellite earth station user's wireless access simultaneously, and then nimble convenient realization human-computer interaction and communication service use, promote user's use greatly and experience.

The multi-mode wireless satellite communication terminal integrates FDMA, TDMA communication modules, an integrated management module and other core modules, realizes wireless access of user wireless terminals (mobile phones, PADs, PCs and the like) in a mode that WIFI (Route mode) and LORA (access point) wireless communication units are embedded in the integrated management module, and realizes various communication applications through a satellite communication gateway station. The utility model only carries out initial discrimination on the service type and selects the corresponding transmission mode, and the switching of the transmission mode is not carried out in the communication process; the communication time slot is adjusted in real time by the satellite communication gateway station according to the change of the communication rate only when the TDMA transmission system is adopted, so that the flexibility of resource use is improved. The method has the advantages that the method can be directly applied to the existing satellite communication system, the software and hardware transformation of the existing satellite communication system is not needed, the implementation mode is simpler, and the cost is lower.

The multi-mode wireless satellite communication terminal adopts a WIFI and LORA wireless access mode to replace a traditional wired access user service terminal, so that users in the earth station can conveniently use equipment with wireless access capability, such as a common mobile phone, a PAD or a PC and the like, to realize various communication services; particularly, the introduction of an LORA wireless communication mode based on the technology of the Internet of things enables the wireless access range of a user to be up to 15 km; meanwhile, the matching of the LORA and the WIFI can comprehensively utilize the advantages of two wireless access modes, the WIFI provides high-speed transmission service for short-distance users, and the LORA provides a low-speed stable and reliable transmission link for long-distance users.

The utility model discloses a concrete technical scheme as follows:

the first scheme is as follows: a multimode wireless satellite communication terminal comprises an FDMA communication module, a TDMA communication module, an integrated management module, a medium-frequency power distribution module and a power management module, wherein the integrated management module is provided with a WIFI unit, an LORA unit and an interface unit; the FDMA communication module, the TDMA communication module and the LORA unit are in communication connection with the WIFI unit through network interfaces, and the WIFI unit is also connected with the interface unit through the network interfaces;

the intermediate frequency power distribution module is used for transmitting and receiving satellite intermediate frequency signals; the FDMA communication module is used for coding and modulating or demodulating and decoding SCPC/DAMA transmission signals in satellite intermediate-frequency signals; the TDMA communication module is used for coding and modulating or demodulating and decoding TDM/TDMA transmission signals in satellite intermediate frequency signals; the WIFI unit adopts a routing mode, the LORA unit adopts a hotspot mode, and the WIFI unit provides information interaction with the communication module for WIFI and LORA users; the interface unit is connected with the WIFI unit through a network interface and used for indicating the working states of the FDMA communication module and the TDMA communication module; the power management module receives external power supply, and supplies power to the FDMA communication module, the TDMA communication module, the WIFI unit and the LORA unit after DC/DC conversion.

Preferably, the interface unit is further provided with a network interface for connecting a wired terminal user in a communication manner.

As a preferred scheme, the power management module receives an external 24V DC power, and after DC/DC conversion, provides a 12V DC power for the FDMA communication module and the TDMA communication module, and provides a 5V DC power for the WIFI unit and the LORA unit.

Scheme II: a multimode wireless satellite communication system is characterized by comprising a communication satellite, a satellite communication earth station, a user terminal, a satellite communication gateway station and a ground communication network; the satellite communication earth station is provided with an antenna, radio frequency equipment and the multimode wireless satellite communication terminal according to the first scheme; the user terminal is provided with a WIFI communication module and a LORA communication module.

As a preferred scheme, the satellite communication gateway station is configured with an antenna, a radio frequency device, a network management device and a service relay device, and is used for implementing network management and service processing

Preferably, the terrestrial communication network includes a public switched telephone network, a public land mobile telephone network, the Internet, and a private communication network.

The utility model discloses following beneficial effect has:

(1) the method is suitable for the newly-built satellite communication system and the capacity improvement of the existing satellite communication system, does not need to change the existing network management architecture and strategy, 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 and single-person portable satellite communication equipment.

(2) The system has the advantages that a suitable satellite communication system and a suitable transmission mode can be switched in a non-inductive mode according to the communication service type, daily communication and private network communication guarantee are provided, the utilization efficiency of system satellite resources can be improved, the investment of operators is reduced, and the use experience of users can be improved.

(3) The equipment state management and the service application can be carried out on the wireless user terminal such as a mobile phone, a PAD, a portable computer and the like, and the equipment state management and the service application are simple, convenient and easy to use.

(4) The wireless access mode can also reduce the equipment accessory composition, enhance the use flexibility and convenience, improve the user access distance and the coverage range, and simultaneously increase the reliability and the maintainability of the equipment.

Drawings

FIG. 1 is a schematic diagram of connection of internal functional modules of a multimode wireless satellite communication terminal;

FIG. 2 is a schematic diagram of a signal transmission flow of a multimode wireless satellite communication terminal;

FIG. 3 is a schematic diagram of a signal receiving process of the multimode satellite radio communication terminal;

fig. 4 is a schematic diagram of a multimode wireless satellite communication system.

Detailed Description

The technical solution of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, embodiment 1 discloses a multimode wireless satellite communication terminal, which can be applied to FDMA/TDMA multimode satellite communication systems or existing FDMA or TDMA satellite communication systems, and mainly comprises an FDMA communication module, a TDMA communication module, an intermediate frequency power distribution module, a power management module and an integrated management module. Wherein: the FDMA communication module is mainly responsible for signal coding-modulation-transmission and receiving-demodulation-decoding in an SCPC/DAMA transmission mode, and adopts a frequency division multiple access mode to distinguish users by frequency; the TDMA communication module is mainly responsible for coding-modulating-sending and receiving-demodulating-decoding in a TDM/TDMA transmission mode, and adopts a time division multiple access mode to distinguish users by time slots; 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, so that the receiving and the sending of the satellite intermediate frequency signals are realized; the power management module receives external power supply, and supplies power to the FDMA communication module, the TDMA communication module and the functional unit embedded in the comprehensive management module after DC/DC conversion; the WIFI unit, the LORA unit and the interface unit are embedded in the comprehensive management module and are integrated into an integrated module, wherein the WIFI unit adopts a routing mode (Route mode) and is responsible for receiving and transmitting spatial WIFI wireless signals, the LORA unit adopts a hotspot mode (AP mode) and is responsible for receiving and transmitting spatial LORA wireless signals, but inside the multi-mode wireless satellite communication terminal, the WIFI unit is concentrated to carry out forwarding processing, and the WIFI unit provides information interaction with each communication module for WIFI and LORA users.

In the multi-mode wireless satellite communication terminal, an FDMA communication module, a TDMA communication module and an LORA unit are connected with a WIFI unit through network interfaces to realize IP data exchange; the FDMA communication module and the TDMA communication module are also connected with the interface unit through a WIFI unit; the WIFI unit is connected with the interface unit through a network interface and can provide a wired data interface for a user. The method specifically comprises the following steps: the LORA unit is connected to a WIFI unit LAN port, the FDMA communication module is connected to the WIFI unit LAN port, a service and management network port of the TMDA communication module is respectively connected to a WAN port and a LAN port of the WIFI unit, and an external LAN interface of the multimode wireless satellite communication terminal is connected to the WIFI unit LAN port; meanwhile, the working state indication of the FDMA and TDMA communication module is connected to the outside of the multimode wireless satellite communication terminal through an interface unit, so that a user can observe the working state conveniently.

As shown in fig. 2, when a user at a home sphere station calls, the user terminal is operated to perform service communication according to service requirements, the user terminal performs frame processing on service information according to service types, and transmits the processed data to a WIFI unit inside the multimode wireless satellite communication terminal through a 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, and data information is received and encoded and modulated by the TDMA communication module by using frame markers of different service types; and finally, sending out the signals through an intermediate frequency power distribution module.

As shown in fig. 3, when a call is received or service information is received, 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, 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, and the user terminal performs identification according to the frame tag contained 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 above service types are distinguished based on symmetric and asymmetric communication, where voice, short message and video services are symmetric communication, and data access, including data uploading and downloading, is asymmetric communication.

As shown in fig. 4, embodiment 2 discloses a multimode wireless satellite communication system (referred to as "the system"), which is based on FDMA/TDMA multimode satellite communication system, and includes a communication satellite, a satellite communication earth station (including an antenna and a radio frequency device) for installing multimode wireless satellite communication terminals, a user terminal, a satellite communication gateway station, and a terrestrial communication network.

The satellite communication earth station mainly comprises an antenna, a device radio frequency, a multi-mode wireless satellite communication terminal and related corollary devices, is mainly used for receiving and transmitting satellite signals, processing service information and accessing users, and provides data transmission channels and communication services for the users.

The user terminal is a wireless communication terminal commonly used in the market, for example, a smart phone, a PAD, a computer with a WIFI function, and the like. The user terminal can be connected with the multimode wireless satellite communication terminal by using built-in WIFI (wireless fidelity), can also be connected with the multimode wireless satellite communication terminal by a special LORA (remote access router) access module, and realizes various applications by pre-installing a special multimode communication program.

The satellite communication gateway station mainly comprises an antenna, radio frequency equipment, network management equipment (namely 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; the service processing function mainly provides interconnection and intercommunication between a remote satellite earth station user and a ground communication network user, provides information access, interaction and forwarding, and realizes communication service between users.

The ground communication network mainly includes PSTN (public switched telephone network), PLMN (public land mobile network), Internet (Internet), and special communication networks such as military telephone automatic network, enterprise data private network, etc.

In the system, a satellite communication earth station additionally provided with a multimode wireless satellite communication terminal accesses a ground communication network by depending on a communication satellite, a space link (satellite link) and a satellite communication gateway station, a user can access the multimode wireless satellite communication terminal by using wireless communication equipment such as a mobile phone, a PAD (PAD application data) and the like, and then accesses the ground communication network by the satellite communication gateway station, so that various service applications are realized. When the multi-mode wireless satellite communication terminal is applied, the multi-mode wireless satellite communication terminal is powered on and accessed into a network, a user uses wireless communication equipment such as a mobile phone and the like to access and initiate a service requirement in a WIFI or LORA mode, and the satellite communication gateway station provides a spatial link for the earth station after receiving the earth station communication requirement and provides data exchange with a ground communication network. It should be noted that the antenna and the rf device may also be integrated with the multimode wireless satellite communication terminal.

The multimode wireless satellite communication terminal integrates FDMA, TDMA communication modules, an integrated management module and other core modules, realizes wireless access of a user wireless terminal in a mode of a WIFI and LORA wireless module embedded in the integrated management module, and realizes various communication applications through a satellite communication gateway station. Specifically, the multimode wireless satellite communication terminal described in embodiment 1 may be used.

Embodiment 3 discloses a multimode wireless satellite communication method, based on the multimode wireless satellite communication system described in embodiment 2, which mainly includes the following steps:

and S1, automatically searching the TDM signal issued by the network management center according to the preset parameters after the multimode wireless satellite communication terminal is powered on, and completing network access.

S12, the earth station user searches the wireless signal of the multimode wireless satellite communication terminal on the user terminal (external connection or built-in LORA access module), and accesses the multimode wireless satellite communication terminal in a WIFI or LORA mode according to the requirement or signal intensity. The WIFI coverage radius is about 50 meters, the WIFI coverage radius is mainly suitable for high-speed services when the user terminal is close to the earth station, the LORA coverage radius is as far as 15km, and the WIFI coverage radius is mainly suitable for low-speed services when the user terminal is far away from the earth station.

S13, the user of the earth station calls and communicates the service through the user terminal, processes the frame of the called number, the service rate and the service information, and sends the processed frame to the WIFI unit of the multi-mode wireless satellite communication terminal through the WIFI or LORA wireless link. After the data processed by the frames reach the WIFI unit, the data are broadcasted to each unit module, and each unit module selects to process or discard the data according to the frame header identification. It should be noted that the WIFI unit is used for data exchange, and when the WIFI unit is connected wirelessly or by wire, each unit module in the multimode wireless satellite communication terminal except for the power supply and the intermediate frequency power distribution unit is connected to the WIFI unit for data exchange.

The method specifically comprises the following steps: a user terminal initiates a service call, if the service type is voice, short message, data transmission (also called data access) and real-time video service, and carries out frame processing on control information such as a called number, the service type, communication rate and the like of the call, and then sends the frame processing to a WIFI unit of a multimode wireless satellite communication terminal through a wireless link; the WIFI unit broadcasts the control information, other modules except the FDMA communication module discard the control information, and the FDMA communication module establishes a satellite communication link with an opposite-end earth station according to a called number and a communication rate contained in the control information; after the link is successfully established, the FDMA communication module sends the link state to the user terminal, and at the moment, the user can carry out service communication; during service communication, voice, short messages, data and video information of a user are subjected to frame processing by a user terminal and are sent to a WIFI unit of a multimode wireless satellite communication terminal through a wireless link, the WIFI unit broadcasts the service information, other modules except an FDMA communication module discard the information, and the FDMA communication module sends the information to an opposite-end earth station to realize service communication after acquiring the information. If the service type is data access, directly entering service data frame processing, sending the processed service data frame to a WIFI unit of the multimode wireless satellite communication terminal through a wireless link, broadcasting the service information by the WIFI unit, discarding the information by other modules except the TDMA communication module, and sending the information to an opposite-end earth station by the TDMA communication module after acquiring the information so as to realize service communication.

The specific way of distributing Frequency Domain (FDMA) resources by the network management center is as follows: after receiving the service information forwarded by the intermediate frequency power distribution module, the FDMA communication module reports a communication demand application comprising the number of the other party, the service type and the service rate to a network management center through a TDM channel; the receiving network management center distributes the receiving and sending frequency points for the two communication parties according to the type and the rate of the communication service; and then, modulating the service information, connecting the modulation at the corresponding frequency point, transmitting the service information to the radio frequency equipment, and demodulating the service information on the carrier wave of the corresponding frequency point by the opposite terminal.

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, and allocate more communication time slots for the TDMA communication module of the corresponding earth station, so that the communication capacity of the TDMA communication module is improved.

Therefore, the flexible application of the FDMA and TDMA system, the wireless access and the application of the user can be realized through the process, and the communication service application of the local user and the opposite-end user is further realized.

It should be noted that, besides using WIFI and LORA wireless access, the multimode wireless satellite communication terminal can also simultaneously reserve the physical interfaces of the services such as telephone and data, and has the capability of providing services for the users of the wired terminal, that is, the user terminal can also be a wired terminal, such as a two-wire telephone, a computer, etc., and when in use, the multimode wireless satellite communication terminal can be connected with the network cable through the telephone cable.

To sum up, the utility model discloses a through whole consideration and integrated design, multimode wireless satellite communication terminal can provide dual communication transmission system and noninductive switching experience for the user, need not user's intervention can select suitable communication transmission mode according to the tactics of system design, can adapt to different communication needs and application occasion, the effective utilization ratio of satellite resources that improves; by integrating WIFI, particularly introducing an LORA wireless access mode, the flexibility of arrangement and use of a business terminal is greatly improved, and the service range of an earth station is enlarged, so that the service capabilities of short-distance high-speed communication and long-distance reliable communication are realized; meanwhile, by using wireless products such as mobile phones and PADs which are universal in the market, a use mode and experience operation which are convenient, simple, easy to use and maintain are provided for users. And, the utility model discloses both can be applied to newly-built satellite communication system, do not have under the satellite communication system had carried out the condition of any change, through newly-built or install additional among existing all kinds of satellite communication earth stations, the convenience is upgraded the transformation to current communication satellite earth station.

Finally, it should be noted that, although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-mentioned embodiments and application fields, and the above-mentioned embodiments are only illustrative and instructive, but not limiting. Those skilled in the art, having the benefit of this disclosure, may effect numerous modifications thereto without departing from the scope of the invention as defined by the claims.

Claims (6)

1. A multimode wireless satellite communication terminal is characterized by comprising an FDMA communication module, a TDMA communication module, a comprehensive management module, a medium-frequency power distribution module and a power management module, wherein the comprehensive management module is provided with a WIFI unit, an LORA unit and an interface unit; the FDMA communication module, the TDMA communication module and the LORA unit are in communication connection with the WIFI unit through network interfaces, and the WIFI unit is also connected with the interface unit through the network interfaces; the intermediate frequency power distribution module is used for transmitting and receiving satellite intermediate frequency signals; the FDMA communication module is used for coding and modulating or demodulating and decoding SCPC/DAMA transmission signals in satellite intermediate-frequency signals; the TDMA communication module is used for coding and modulating or demodulating and decoding TDM/TDMA transmission signals in satellite intermediate frequency signals; the WIFI unit adopts a routing mode, the LORA unit adopts a hotspot mode, and the WIFI unit provides information interaction with the communication module for WIFI and LORA users; the interface unit is connected with the WIFI unit through a network interface and used for indicating the working states of the FDMA communication module and the TDMA communication module; the power management module receives external power supply, and supplies power to the FDMA communication module, the TDMA communication module, the WIFI unit and the LORA unit after DC/DC conversion.

2. The multimode wireless satellite communications terminal of claim 1, wherein the interface unit is further provided with a network interface for communicatively coupling with a user of the wired terminal.

3. The multimode wireless satellite communications terminal of claim 1, wherein the power management module receives external 24V DC power, and after DC/DC conversion, provides 12V DC power for the FDMA communications module and the TDMA communications module, and 5V DC power for the WIFI unit and the LORA unit.

4. A multimode wireless satellite communication system is characterized by comprising a communication satellite, a satellite communication earth station, a user terminal, a satellite communication gateway station and a ground communication network; the satellite communication earth station is provided with an antenna and a radio frequency device, and the multimode wireless satellite communication terminal of any one of claims 1 to 3; the user terminal is provided with a WIFI communication module and a LORA communication module.

5. The multimode wireless satellite communication system of claim 4, wherein the satellite communication gateway station is configured with an antenna and radio frequency equipment, network management equipment and service relay equipment for implementing network management and service processing.

6. The multimode wireless satellite communications system of claim 4, wherein the terrestrial communications network comprises a public switched telephone network, a public land mobile telephone network, the Internet, and a private communications network.

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