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Network access and control method based on satellite multicast and backhaul channel sharing

A backhaul channel and control method technology, applied in the field of computer network communication, can solve problems such as high cost, reliance on ground links, application and deployment limitations, etc.

Inactive Publication Date: 2009-04-29
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] It can be seen that although the existing Internet networking technology based on satellite communication technology has been able to realize two-way communication between users in remote areas and other nodes or even nodes on the global Internet, the existing technology either strongly relies on ground links , or the cost is too high, often greatly restricting its application and deployment

Method used

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  • Network access and control method based on satellite multicast and backhaul channel sharing
  • Network access and control method based on satellite multicast and backhaul channel sharing
  • Network access and control method based on satellite multicast and backhaul channel sharing

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Experimental program
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Effect test

Embodiment Construction

[0137] Operation steps of the master station:

[0138] Step 1. Define relevant parameters,

[0139] Step 1.1 Set the system delay parameters, where KEEP_ALIVE_INTERVAL is 60 seconds, MODEM_CONTROL_DELAY is 20 seconds, if the delay of the satellite network obtained by the test is t, other parameters are defined as:

[0140] CLIENT_RESPONSE_DELAY: 50t

[0141] CLIENT_CLOSE_DELAY: 50t+MODEM_CONTROL_DELAY

[0142] CLIENT_OPEN_DELAY: 50t+MODEM_CONTROL_DELAY

[0143] CLIENT_COMMUNICATION_DELAY: 30t

[0144] Step 1.2 Set the current backhaul channel user CID to 0, indicating that no one is using the backhaul channel

[0145] Step 1.3 Set the sending function flag RF_STATE of the "virtual small station" modem to the "OFF" state, that is, the sending function is not turned on.

[0146] Step 2. Start the master station control program, send a command message with a query command through multicast, and wait for the CLIENT_RESPONSE_DELAY time.

[0147] Step 2.1 If the status message...

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Abstract

The utility model relates to a sharing network access and control method based on the satellite multicast and the return channel, which belongs to the technical field of network communication. The utility model is characterized in that: all sub-stations share a common return channel by means of time period division, but in each moment only one station is allowed to exclusively occupy the return channel according to the switching orders under the control of the main station. At the same time, the main station controls a virtual sub-station to prevent the multi cast stagnation due to the failure of the next sub-station to open the channel The utility model has the advantages of low cost, high efficiency, applicability to the Internet communications users in remote areas and the vast rural areas.

Description

technical field [0001] A network access and control method based on satellite multicast and backhaul channel sharing belongs to the technical field of computer network communication. Background technique [0002] In 1962, AT&T launched the world's first real satellite. Since then, satellite technology has flourished, and countless communication satellites have been launched into orbit around the earth, occupying a pivotal position in the communication system. However, with the development of optical communication technology, the use of satellite communication is relatively limited due to factors such as low bandwidth, low throughput, and high cost. [0003] Nevertheless, compared with optical communication, satellite communication still has the following advantages: [0004] ●It is easy to cover a large area of ​​the ground through satellites, broadcast and multicast in a large area, and there is no high requirement on the ground conditions, but it is difficult to lay grou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/44H04L12/56H04L45/16
Inventor 李星杨家海鲁文斌严程张勇
Owner TSINGHUA UNIV