CN104184714A - VSAT network-based gateway station IP data processing method - Google Patents
VSAT network-based gateway station IP data processing method Download PDFInfo
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- CN104184714A CN104184714A CN201310200166.3A CN201310200166A CN104184714A CN 104184714 A CN104184714 A CN 104184714A CN 201310200166 A CN201310200166 A CN 201310200166A CN 104184714 A CN104184714 A CN 104184714A
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Abstract
The invention discloses a very small aperture terminal (VSAT) network-based gateway station IP data processing method. According to the method, received data are demodulated; a data processing directory is configured, a parameter needed for IP data processing is designated, and the demodulated data are processed as IP data; and the processed IP data are sent to the internet by a switch. According to the invention, the data received by the gateway station are demodulated and then are processed into the IP data that can be identified by the internet; and then the data are sent out. Therefore, communication between the gateway station in the VSAT network and the computer in the internet can be realized.
Description
Technical field
The present invention relates to technical field of data processing, particularly a kind of gateway station IP data processing method based on VSAT network.
Background technology
VSAT(Very Small Aperture Terminal) satellite communication system has that ground-plane antenna diameter is little, transmitting power is low, economic and practical, be not subject to the advantage such as landform and climatic influences, networking flexibility, in network service, be used widely at present.The above ground portion of VSAT satellite communication system is made up of gateway station, remote terminal and network control unit, the effect of gateway station is the access for remote terminal allocated channel and control remote terminal, remote terminal is the main body of satellite communication network, and VSAT satellite communication network is made up of many remote terminals.
The protocol suite that internet adopts is TCP/IP protocol suite, and IP is the agreement of network layer in TCP/IP protocol suite, is the core protocol of TCP/IP protocol suite.At present, IP data adopt IPv4, IPv6 agreement conventionally.IP data file is structurally divided into 3, is respectively file header, recording areas and index area.While searching IP, first search record-shifted (conventionally adopting binary chop search to search) in index area, and then to recording areas sense information.
Because frame format, data rate that VSAT network uses are all different from internet with frame length restriction, so will be by the data retransmission in VSAT network to internet, the data that must receive VSAT at gateway station are processed, be converted to the IP data format that can identify internet,, the data that on gateway station, VSAT demodulator produced are reduced to IP data, and the address information that gateway station provides according to IP data, on the computer that this data retransmission is specified to internet.Therefore the method that by the data processing in VSAT network is the discernible IP data in internet is very necessary.
Summary of the invention
The object of the present invention is to provide a kind of gateway station IP data processing method based on VSAT network, realizing gateway station in VSAT network by the method will be the IP data that internet can be identified to the data processing receiving.
In order to realize foregoing invention object, the invention provides following technical scheme:
A gateway station IP data processing method based on VSAT network, comprises step:
(1) intermediate-freuqncy signal receiving is exported after No. 16 demodulator demodulation;
(2) gateway station is IP data by the data processing after demodulation, specifically comprises step:
(2-1) source of configuration data file storing directory, output data file storing directory and source data backup file storing directory, and select the main channel number of pending source data file and from channel number;
(2-2) create thread, in this thread, call the required parameter of initialization function configuration of IP data processing, described parameter comprises tupe, original file data backup path, the result storing path of original document path, original file data type, data after demodulating, the channel number and be transferred to every blocks of data length of pretreatment module of matching;
(2-3) call and start reception and process of transmitting function, judge according to the packet header packet information after gateway station demodulation whether the packet receiving is IP data, if not IP data, packet is not processed, if IP data, IP data are taken out from the packet gateway station demodulation, start the data handling procedure of preliminary treatment and distribution module and all Service Processing Module dynamic base simultaneously, complete IP data group bag;
(2-4) call status poll function, whether data query is processed and is completed; If data processing does not complete, continue cyclic query; If data processing completes, call terminating reception process of transmitting function, terminating reception and send-thread stop the data handling procedure of preliminary treatment and distribution module and all Service Processing Module dynamic base simultaneously;
(3) by IP package forward to LAN port, be sent to internet by switch.
According to the embodiment of the present invention, if the tupe of data after demodulating described in step (2-3) is directly to process, be the memory address that data after demodulating is deposited by original document path configurations, the establishing of original file data backup path is set to null pointer.For the higher application scenario of requirement of real-time, directly from buffering area, read the data after demodulation and be processed into IP data, now, original file data backup path need be made as null pointer, and original document path is the memory address that data after demodulating is deposited.
According to the embodiment of the present invention, if the tupe of data after demodulating described in step (2-3) is deposit reprocessing, original document path is the store path of specifying, and original file data backup path is the backup path of specifying.For the lower application scenario of requirement of real-time, can first the data after the demodulation of reading in buffering area be deposited, then be processed into IP data, now, need to specify the backup path of original file data, also need to specify the store path of original document.
compared with prior art, beneficial effect of the present invention: first the inventive method carries out demodulation to the data that receive, and then gateway station is processed into the discernible IP Packet Generation in internet by the data after demodulation and goes out, and has realized communicating by letter between gateway station and internet Computer in VSAT network.
Brief description of the drawings:
Fig. 1 is the gateway station IP flow chart of data processing figure that the present invention is based on VSAT network;
Fig. 2 is the flow chart of processing output IP data in the inventive method;
Fig. 3 is IP data spliced maps;
Fig. 4 is deposit data read-write operation procedure chart;
Fig. 5 is buffer data read-write operation procedure chart.
Embodiment
Below in conjunction with test example and embodiment, the present invention is described in further detail.But this should be interpreted as to the scope of the above-mentioned theme of the present invention only limits to following embodiment, all technology realizing based on content of the present invention all belong to scope of the present invention.
With reference to figure 1, a kind of gateway station IP data processing method based on VSAT network provided by the invention, first carries out demodulation process by No. 16 demodulators to the intermediate-freuqncy signal receiving, and exports data buffer zone after demodulation to; Then gateway station is IP data by the data processing after demodulation, recomposition IP packet; Finally by IP package forward to LAN port, be sent to internet by switch.
According to application scenario, be in IP data procedures at gateway station by the data processing after demodulation, if higher to requirement of real-time, gateway station directly reads the data after demodulation from buffering area, processes data into IP data; If lower to requirement of real-time, can will after the data deposit of demodulator output, be treated to again IP data.Embodiment 1 and embodiment 2, respectively for two kinds of processing modes (i.e. the tupe of two kinds of data after demodulating), are that IP data procedures is elaborated to gateway station in the inventive method by the data processing after demodulation.
Embodiment 1
In the lower application scenario of requirement of real-time.First source of configuration data file storing directory, output data file storing directory and source data backup file storing directory, and select the main channel number of pending source data file and from channel number.Then in gateway station data administrator, create a new thread, in this thread, calling IP data processing module is IP data by the data processing after demodulation, concrete: in the thread starting, call initialization function, the needed parameter of configuration of IP data processing, , input original document path, original file data type, the tupe (tupe is herein deposit reprocessing) of data after demodulating, original file data backup path (original file data backup path is the output file path in deposit data read-write operation process), result storing path, pairing channel number (be the main channel number of pending source data and from channel number) and be transferred to every blocks of data length of pretreatment module.Deposit data read-write operation process is shown in Fig. 4, and IP data processing module reads the data after demodulation from original document path, and then the data that read are write to output file path.Then call to start and receive and process of transmitting function, judge according to the packet header packet information after gateway station demodulation whether the packet receiving is IP data, if not IP data, packet is not processed, if IP data are taken out IP data from the packet gateway station demodulation, start the data handling procedure of preliminary treatment and distribution module and all Service Processing Module dynamic base simultaneously, automatic Mosaic IP Frame (referring to Fig. 3), composition IP packet.Finally call status poll function, whether inquiry IP data processing completes, if IP data processing does not complete, continue cyclic query, if IP data processing completes, call terminating reception process of transmitting function, terminating reception and send-thread stop the data handling procedure of preliminary treatment and distribution module and all Service Processing Module dynamic base simultaneously.As shown in Figure 2.
Embodiment 2
In the high application scenario of requirement of real-time.First source of configuration data file storing directory, output data file storing directory and source data backup file storing directory, and select the main channel number of pending source data file and from channel number.Then in gateway station data administrator, create a new thread, in this thread, call IP data processing module, IP data processing module is directly processed into IP data to the data after demodulation in buffering area, concrete: in the thread starting, call initialization function, the needed parameter of configuration of IP data processing, , input original document path (memory address that original document path is data after demodulating herein), original file data type, (tupe is herein directly to process to the tupe of data after demodulating, directly become IP data from buffering area reading out data reprocessing), original file data backup path (original file data backup path is made as null pointer herein), result storing path, pairing channel number and the every blocks of data length that is transferred to pretreatment module.Buffer data read-write operation process is shown in Fig. 5, and IP data processing module reads the data after demodulation herein from initial data address (initial data address is the memory address of data after demodulating); Then call to start and receive and process of transmitting function, judge according to the packet header packet information after gateway station demodulation whether the packet receiving is IP data, if not IP data, packet is not processed, if IP data are taken out IP data from the packet gateway station demodulation, start the data handling procedure of preliminary treatment and distribution module and all Service Processing Module dynamic base simultaneously, automatic Mosaic IP Frame (referring to Fig. 3), composition IP packet; And then IP packet is write to output datarams address (the IP packet of depositing on output datarams address can regularly be forwarded to network interface output).Finally call status poll function, whether inquiry IP data processing completes, if IP data processing does not complete, continue cyclic query, if IP data processing completes, call terminating reception process of transmitting function, terminating reception and send-thread stop the data handling procedure of preliminary treatment and distribution module and all Service Processing Module dynamic base simultaneously.As shown in Figure 2.
Step in this specification in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing), unless narration especially all can be replaced by other equivalences or the alternative features with similar object.,, unless narration especially, each feature is an example in a series of equivalences or similar characteristics.
Claims (3)
1. the gateway station IP data processing method based on VSAT network, is characterized in that, comprises step:
(1) intermediate-freuqncy signal receiving is exported after No. 16 demodulator demodulation;
(2) gateway station is IP data by the data processing after demodulation, specifically comprises step:
(2-1) source of configuration data file storing directory, output data file storing directory and source data backup file storing directory, and select the main channel number of pending source data file and from channel number;
(2-2) create thread, in this thread, call the required parameter of initialization function configuration of IP data processing, described parameter comprises tupe, original file data backup path, the result storing path of original document path, original file data type, data after demodulating, the channel number and be transferred to every blocks of data length of pretreatment module of matching;
(2-3) call and start reception and process of transmitting function, judge according to the packet header packet information after gateway station demodulation whether the packet receiving is IP data, if not IP data, packet is not processed, if IP data, IP data are taken out from the packet gateway station demodulation, start the data handling procedure of preliminary treatment and distribution module and all Service Processing Module dynamic base simultaneously, complete IP data group bag;
(2-4) call status poll function, whether inquiry IP data processing completes; If IP data processing does not complete, continue cyclic query; If IP data processing completes, call terminating reception process of transmitting function, terminating reception and send-thread stop the data handling procedure of preliminary treatment and distribution module and all Service Processing Module dynamic base simultaneously;
(3) by IP package forward to LAN port, be sent to internet by switch.
2. the gateway station method of speech processing based on VSAT network according to claim 1, it is characterized in that, if the tupe of data after demodulating described in step (2-3) is directly to process, the memory address that original document path configurations is data after demodulating, the establishing of original file data backup path is set to null pointer.
3. the gateway station method of speech processing based on VSAT network according to claim 1, it is characterized in that, if the tupe of data after demodulating described in step (2-3) is deposit reprocessing, original document path is the store path of specifying, and original file data backup path is the backup path of specifying.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111342884A (en) * | 2020-02-24 | 2020-06-26 | 北京华力创通科技股份有限公司 | Method, device and system for analyzing demodulation performance of gateway station and storage medium |
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| CN101350766A (en) * | 2007-07-18 | 2009-01-21 | 新疆亚奥数码科技有限公司 | Stream media server system based on VSAT |
| CN101719784A (en) * | 2009-11-25 | 2010-06-02 | 成都林海电子有限责任公司 | Digital trunking communication system and method based on VSAT satellite gateway station |
| CN102882879A (en) * | 2012-10-08 | 2013-01-16 | 中国电子科技集团公司第五十四研究所 | Internet protocol (IP) data compression transmission method applicable to satellite channel |
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Patent Citations (5)
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| CN1199289A (en) * | 1997-04-15 | 1998-11-18 | 环球星有限合伙人公司 | Low earth orbit distributed gateway communication system |
| US6070070A (en) * | 1998-01-20 | 2000-05-30 | Aeris.Net | Method and apparatus for remote telephony switch control |
| CN101350766A (en) * | 2007-07-18 | 2009-01-21 | 新疆亚奥数码科技有限公司 | Stream media server system based on VSAT |
| CN101719784A (en) * | 2009-11-25 | 2010-06-02 | 成都林海电子有限责任公司 | Digital trunking communication system and method based on VSAT satellite gateway station |
| CN102882879A (en) * | 2012-10-08 | 2013-01-16 | 中国电子科技集团公司第五十四研究所 | Internet protocol (IP) data compression transmission method applicable to satellite channel |
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| CN111342884A (en) * | 2020-02-24 | 2020-06-26 | 北京华力创通科技股份有限公司 | Method, device and system for analyzing demodulation performance of gateway station and storage medium |
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Effective date of abandoning: 20180302 |