CN101127664A - Device for intercommunication video and audio between satellite network and ground LAN - Google Patents
Device for intercommunication video and audio between satellite network and ground LAN Download PDFInfo
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- CN101127664A CN101127664A CNA2007101314858A CN200710131485A CN101127664A CN 101127664 A CN101127664 A CN 101127664A CN A2007101314858 A CNA2007101314858 A CN A2007101314858A CN 200710131485 A CN200710131485 A CN 200710131485A CN 101127664 A CN101127664 A CN 101127664A
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Abstract
The utility model relates to a video and audio intercommunication device between a satellite network and a local network in the ground, comprising a master unit (1), a receiving and transmit element of a first satellite (2), an assistant unit (3), a ground transformation unit (4), a receiving and transmit element of a second satellite (5) and a ground network unit (6); wherein, the master unit (1) is connected with the receiving and transmit element of the first satellite (2) and the receiving and transmit element of the second satellite (5) respectively through satellite wireless transmission; the receiving and transmit element of the first satellite (2) is connected with the assistant unit (3) through mesh wire; the ground transformation unit (4) is connected with the receiving and transmit element of the second satellite (5) and the ground network unit (6) through mesh wire. The utility model has the advantages of flexible application of satellite network and incorporation of the satellite network into the current most popular internet based on IP by well integrating the satellite network with the local network in the ground (5) through the ground transformation unit (4).
Description
Technical field
The present invention utilizes static mappings to make satellite network and ground LAN mutual communication, belongs to the integration technology field of wireless communication and wired network communication.
Background technology
Because the many regional ground communication bandwidth resources of present stage China are not enough, can't support the Streaming Media transmission fully, and the Internet operators implement restricted online broadcast business in order to prevent network broadcasting windstorm simultaneously; Operator takies in order to prevent that bandwidth from being used by the minority Streaming Media simultaneously, is provided with many policy constraints Video Applications.But some features as long-range classroom instruction are that its network downlink information amount is big, and are based on image and sound mostly.Obviously existing terrestrial interconnection net can not support well that channel then can address the above problem just via satellite.
The satellite communication machine has been distributed one section fixed IP addresses when provide giving the client, these addresses are the addresses of using in satellite network, if merge with client's local area network (LAN), may meet difficulty.Because client's ground network again may with communication equipment not at the same network segment, like this communication equipment in the satellite network just can't with the devices communicating in the ground network, so just need an intermediate conversion equipment to connect satellite network and terrestrial network, but common conversion equipment, when conversion to the packet conversion of TCP better, voice, what video was used all is the packet of UDP generally, present so many conversion equipments are not so good to the conversion of voice and video, cause voice and video to penetrate, video and audio terminal can't be communicated by letter with the video and audio terminal of ground network in the satellite network.So just can not reach the effect that needs in advance.By the conversion equipment of mentioning in the literary composition, can well support voice and the conversion of video, satellite network and ground LAN can well be merged.
Summary of the invention
Technical problem: the objective of the invention is to overcome deficiency of the prior art, provide a kind of and can realize that satellite network and ground LAN intercommunication look the device of audio frequency, and keep the device of the configuration of local area network (LAN).Save improvement cost and realize greater functionality.
The English full name of technical scheme: NAT is " Network Address Translation ", the Chinese meaning is " network address translation ", it is an IETF (Internet Engineering Task Force, Internet engineering duty group) standard allows a whole mechanism to appear on the Internet with a public IP (Internet Protocol) address.It is a kind of inner private network address (IP address) to be translated into the technology of legitimate network IP address.
Briefly, NAT uses home address exactly in the local area network (LAN) internal network, and when internal node will carry out communication with external network, just at the gateway place, home address is replaced to public address, thereby externally public network (internet) is gone up normal the use, NAT can make many computer share I nternet connect, this function has solved public ip address problem in short supply well, be exactly from the ip address base, choose several sector addresses and be used as specific home address, these addresses are not routed on public network, but by NAT these can not route address transition become legal can be on public network the address of route, so legal address can allow many illegal addresses online, saves public network address by this method.By this method, can only apply for a legitimate ip address, just the computer in the whole local area network be inserted among the Internet.At this moment, NAT has shielded internal network, and all in-house network computers are sightless for public network.Here the home address of mentioning is meant the private IP address of distributing to node in internal network, and this address can only be used in internal network, can not be routed (a kind of network technology can realize the forwarding of different paths).Though home address can random choose, normally used is following address: 10.0.0.0 ~ 10.255.255.255; 172.16.0.0 ~ 172.16.255.255; 192.168.0.0 ~ 192.168.255.255.
The legitimate ip address that NAT becomes can use on the internet with these the reservation IP address translation that can't use on the internet.And global address is meant legal IP address, and it is by NIC (Network Information Centre) or ISP (Internet Service Provider) addresses distributed, externally represents one or more inner local addresses, is unified addressable address, the whole world.
Nat feature is integrated into router usually, in fire compartment wall, isdn router or the independent NAT device.Such as having added this function in the cisco router, the network manager only needs in the IOS of router nat feature to be set, and just can realize the shielding to internal network.Fire compartment wall is mapped as external address 202.96.23.11 with the home address 192.168.1.1 of WEB Server for another example, and in fact external reference 202.96.23.11 address is exactly access 192.168.1.1.The small business of limited fund also can realize this function by software now in addition.Present technique is used this function exactly, an address in the satellite network, does mapping one to one with an address of terrestrial network, also can be described as to bundle, and this particular address of visit satellite is exactly that address in the access torus network.
The present invention combines with the network equipment by the DVB-RCS system, by the NAT technology, needing accessed resource in ground network unit (6), is mapped to the address in the satellite network.Data flow among the present invention, it is the IP packet, send from first communication equipment, mail to satellite by becoming electromagnetic wave signal behind the communication equipment, be converted to the DVB-S standard (standard of China Broadcast ﹠ Television trade information transmission via the main website end, be Digital Video Broadcastlng-Satellite, the digital broadcasting satellite system standard) data, after modulating, be sent to satellite with the electromagnetic wave form, electromagnetic wave is fallen main website from satellite earlier, main website is routed to data by the routing device of internal core the far-end address of appointment, be transmitted on the satellite by transmitter unit again, receive transmitter unit (5) by second satellite then and the electromagnetic wave denoising that receives is amplified and electromagnetic wave signal is reduced into the initial IP packet by the second satellite communication machine.Second satellite receives the address that transmitter unit (2) will visit and broadcasts away in local area network then, ground converting unit (4) adds a router (41), his interface IP address belongs to satellite network, another interface IP address belongs to client's local area network (LAN), the address transition in the visit satellite is realized the function of satellite network access customer local area network (LAN) by router (41) to an address in ground network unit (6).
The device that audio frequency is looked in satellite network of the present invention and ground LAN intercommunication comprises that main station unit, first satellite receive transmitter unit, auxiliary unit, ground converting unit, second satellite reception transmitter unit, ground network unit; Wherein, wireless transmission receives transmitter unit with first satellite respectively to main station unit via satellite, second satellite receives transmitter unit and is connected, first satellite receives transmitter unit and is connected with auxiliary unit by netting twine, and the ground converting unit is connected with second satellite reception transmitter unit, ground network unit respectively by netting twine.
Described main station unit comprises communication satellite, satellite transmission center; Communication satellite receives the Radio Satellite signal that sends from the satellite transmission center, and this Radio Satellite signal is sent to satellite reception transmitter unit; Satellite receives transmitter unit and is connected by common netting twine with ground network equipment.
Described satellite receives transmitter unit and comprises exterior aerial and feed and frequency converter and satellite communication machine.
Described ground converting unit comprises router.
Described auxiliary unit comprises video and audio equipment.
The ground network unit comprises video and audio equipment.
Beneficial effect: beneficial effect of the present invention comprises that the communication in the satellite network can merge mutually with client's local area network (LAN), make things convenient for the use of client to satellite network. can allow the client on existing basis, expand the communication mode of oneself. do not need to change original local area network (LAN) planning, reduce cost: employed hardware all is standard hardware under the existing environment, need not reequip; Broad covered area: the zone that satellite and netting twine can cover can be suitable for the inventive method; The communication mode of world looped network is satellite network and the seamless communication products that merge of ground network; Make multi-communication mode more convenient, more various, efficient is higher.
Description of drawings
Fig. 1 is a structure drawing of device of the present invention.Comprising main station unit 1, communication satellite 11, satellite transmission center 12; First satellite receives transmitter unit 2, first exterior aerial 22, the second satellite communication machine 21; Auxiliary unit 3, first video and audio equipment 31; Ground converting unit 4, router four 1; Second satellite receives transmitter unit 5, second exterior aerial 52, the second satellite communication machine 51; 22 ground network unit 6, second video and audio equipment 61.
Embodiment
This specific embodiment combination technology scheme and accompanying drawing describe in further detail practical application of the present invention.
As shown in drawings: the present invention includes main station unit 1, first satellite reception transmitter unit 2, auxiliary unit 3, ground converting unit 4, second satellite reception transmitter unit 5, ground network unit 6; Wherein, wireless transmission receives transmitter unit 2 with first satellite respectively to main station unit 1 via satellite, second satellite receives transmitter unit 5 and is connected, first satellite receives transmitter unit 2 and is connected with auxiliary unit 3 by netting twine, and ground converting unit 4 is connected with second satellite reception transmitter unit 5, ground network unit 6 respectively by netting twine.
Described main station unit 1 comprises communication satellite 11, satellite transmission center 12; Communication satellite 11 receives from first satellite and receives the Radio Satellite signal that transmitter unit 2 sends, and this Radio Satellite signal is sent to second satellite reception transmitter unit 2.
Described satellite receives transmitter unit and comprises exterior aerial and satellite communication machine.
Described ground converting unit 4 comprises router four 1, and both interconnect router four 1 and ground network unit 6 by netting twine.
Described auxiliary unit 3 comprises video and audio equipment 31, is used for launching looking audio frequency and data-signal.Receiving transmitter unit 2 by the grid line and first satellite is connected.
Practical application hardware environment of the present invention is as follows:
Main station unit (1) is specially: the A9780 main station unit (1) of Alcatel company, adopt the electromagnetic wave of Ku wave band between this unit and the satellite, the agreement of abideing by DVB-S communicates, and uses the Internet between this unit and the message transmission center simultaneously, abides by ICP/IP protocol and communicates;
Communication satellite (11): No. four satellites in Asia;
First exterior aerial 22: 1.8 meters antennas of Chengdu nova and centre halfback's 11300 feed frequency converters thereof;
Second exterior aerial 52: 1.8 meters antennas of Chengdu nova and centre halfback's 11300 feed frequency converters thereof;
4: one router fours 1 of ground converting unit, specific systems soft ware is being moved and to the good support of having penetrated of voice and video in the inside in addition.
Ground network connects: local area network (LAN) connects;
Video and audio equipment 31: adopt the polycom7000s video conference terminal.
Afterwards by on-the-spot test, concrete effect is as follows with above-mentioned hardware connection:
Auxiliary unit 3 network element 6 earthward sends video/audio signal, generally is by point-to-point mode.Auxiliary unit 3 and first satellite receive transmitter unit 2 and link to each other by netting twine.Auxiliary unit 3 converts the analog signal of video to digital signal by oneself hardware earlier, by netting twine signal being packaged into packet then passes to first satellite and receives the first satellite communication machine 21 in the transmitter unit 2, the header packet information that the first satellite communication machine 21 is checked in the packet, extract the destination address of packet, then the baseband signal in the network is modulated into electromagnetic wave signal sends to main station unit 1 main station unit by first exterior aerial 22 satellite transmission center 12, obtain this electromagnetic wave signal, modulator-demodulator by oneself is modulated into baseband signal to electromagnetic wave signal, main website is by the router route data packets of oneself, the modulator-demodulator of main website is modulated into electromagnetic wave signal to the baseband signal in the network and is transmitted on the communication satellite 11 in the main station unit 1 again then, second satellite receives transmitter unit 5 and receives electromagnetic wave signal, electromagnetic wave signal is demodulated to baseband signal, the destination address of the second satellite communication machine, 51 read data packet, local destination address is sought in port broadcasting by itself, router four 1 in the ground converting unit 4 receives the signal of the second satellite communication machine 51, check the address mapping table of itself, discovery has a map entry coupling, just change the header of packet then, send packet from the interface that is connected to ground LAN, video and audio equipment 61 in the packet arrival point torus network unit 6, video and audio equipment 61 becomes analog signal to digital demodulation signal by the hardware of itself, output on the local display by video-out port itself and to finish communication, through the test video smoothness, lamprophonia, the data smoothness.
Claims (4)
1. the device of audio frequency is looked in satellite network and ground LAN intercommunication, it is characterized in that this device comprises that main station unit (1), first satellite receive transmitter unit (2), auxiliary unit (3), ground converting unit (4), second satellite and receive transmitter unit (5), ground network unit (6); Wherein, wireless transmission receives transmitter unit (2) with first satellite respectively to main station unit (1) via satellite, second satellite receives transmitter unit (5) and is connected, first satellite receives transmitter unit (2) and is connected with auxiliary unit (3) by netting twine, and ground converting unit (4) is connected with second satellite reception transmitter unit (5), ground network unit (6) respectively by netting twine.
2. the device of audio frequency is looked in satellite network according to claim 1 and ground LAN intercommunication, it is characterized in that described main station unit (1) comprises communication satellite (11), satellite transmission center (12) and address-translating device; Communication satellite (11) receives the Radio Satellite signal that sends from satellite transmission center (12), and this Radio Satellite signal is sent to satellite reception transmitter unit.
3. the device of audio frequency is looked in satellite network according to claim 1 and ground LAN intercommunication, it is characterized in that described satellite receives transmitter unit and comprises exterior aerial and satellite communication machine, this two be connected in series by the wire signal feeder line.
4. the device that audio frequency is looked in satellite network according to claim 1 and ground LAN intercommunication is characterized in that described ground converting unit (4) is the professional router (41) of a cisco company.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101314858A CN101127664A (en) | 2007-08-31 | 2007-08-31 | Device for intercommunication video and audio between satellite network and ground LAN |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101314858A CN101127664A (en) | 2007-08-31 | 2007-08-31 | Device for intercommunication video and audio between satellite network and ground LAN |
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| Publication Number | Publication Date |
|---|---|
| CN101127664A true CN101127664A (en) | 2008-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101314858A Pending CN101127664A (en) | 2007-08-31 | 2007-08-31 | Device for intercommunication video and audio between satellite network and ground LAN |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012152048A1 (en) * | 2011-10-09 | 2012-11-15 | 中兴通讯股份有限公司 | Method for transmitting network data, wireless communication terminal and host |
| CN109962715A (en) * | 2019-04-11 | 2019-07-02 | 刘策 | One kind is made a phone call unlocking system |
| CN110958258A (en) * | 2019-12-09 | 2020-04-03 | 中国电子科技集团公司第五十四研究所 | Exchange type interface protocol conversion device supporting multiple data types and being extensible |
-
2007
- 2007-08-31 CN CNA2007101314858A patent/CN101127664A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012152048A1 (en) * | 2011-10-09 | 2012-11-15 | 中兴通讯股份有限公司 | Method for transmitting network data, wireless communication terminal and host |
| CN109962715A (en) * | 2019-04-11 | 2019-07-02 | 刘策 | One kind is made a phone call unlocking system |
| CN110958258A (en) * | 2019-12-09 | 2020-04-03 | 中国电子科技集团公司第五十四研究所 | Exchange type interface protocol conversion device supporting multiple data types and being extensible |
| CN110958258B (en) * | 2019-12-09 | 2021-10-22 | 中国电子科技集团公司第五十四研究所 | Exchange type interface protocol conversion device supporting multiple data types and being extensible |
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Open date: 20080220 |