The Study Of The Transport Control Protocol For Satellite Based Internet

As a result of the exponential growth of the networks, the global broad band In-ternet will become true. In addition, with the continuous development of the on-boardsatellite digital processing technology, the signal will not only be relayed like in thebent-pipe transponder, but also be regenerated, multiplexed, switched, and routed on-board satellite. This paper studies transport control protocols for the new generationsatellite networks with on-board digital processors. Based on the ability of the on-boardprocessing, the new generation satellite networks can be classified into two types. Oneis that data is only regenerated, multiplexed, and transmitted by on-board processors.The other is that data is switched or routed on board. In the paper, three solutionsare proposed for these two types of the new generation satellite networks. The maincontributions of our work are as follows:1. A new solution for the satellite networks is proposed. The characteristic ofthe solution is that an on-board TCP-Spoofing proxy is placed in satellite, while TCP-Splitting proxies is placed at gateway stations. The advantages provided by this so-lution are as follows: terrestrial accessing segments can be shielded from the impactof transmission errors and propagation delay over satellite links; the waiting time forthe retransmitted data is reduced; the resource utilization over the satellite links areimproved.2. A new transport control protocol called NSTP is proposed. UDP strategy andperiodical ACK sending strategy are proposed in the protocol. The advantages of theprotocol are: the data rate can be speeded up rapidly, the bandwidth used in reversepath is sharply reduced, and the waiting time for the multiple retransmitted packets isreduced.3. A new end-to-end transport control protocol called TP-Satellite, is proposed.The novel strategies including Super Start, Loss Distinction, Congestion Recovery,Congestion Avoidance and periodical ACK sending strategy, are proposed in it. The exclusive feature of the protocol is that different class priority IP packets are sent alter-nately. TP-Satellite can speed up the data rate quickly, separate packets loss caused bycongestion from link errors effectively, reduce the bandwidth used in the reverse path,fully utilize the resource in the forward path, and exhibit the outstanding performanceover the links with sporadic or burst errors.The features of the new generation satellite networks are considered sufficientlyin the above researches, and the solutions proposed in the paper can improve the per-formance of satellite networks in data and multimedia communication.