Abstract
Delay Tolerant Networks (DTN) are designed to deal with the long delay of space network and frequent link interruption, in 2002. Licklider Transmission Protocol (LTP) was designed to replace the Internetworking Protocol (IP) and Transmission Control Protocol (TCP) in the DTN protocol stack. However, LTP has no congestion control mechanism. If a packet is dropped, the performance of the network will be worse. To deal with this problem, this paper proposes the Ecn-based TFRC Licker Transmission Protocol (ET-LTP) which extends the LTP data packet to record the network condition. The ET-LTP refers to congestion control approach applied on streaming media transmission on this question. A detailed control strategy is proposed in this paper as well. Finally, the simulations are built to test the performance of the ET-LTP. The results prove that the ET-LTP is more robust than LTP when facing the congestion.
Highlights
The vast space is a mystery for human beings, attracting the attention of scientists and experts, people explore the deep space with persistence to build a basic framework for deep space communication and provide services for the communications and navigation requirements between spacecrafts and satellites [1]
If it is in a congested network, Licklider Transmission Protocol (LTP) will quickly occupy bandwidth in the case of coexistence with other Transmission Control Protocol (TCP) protocols, while TCP will lead to the reduction of the sending window on account of the lost packets and deteriorating environment, which affects the performance of the protocol
The improved Ecn-based TCP-Friendly Rate Control (TFRC) Licker Transmission Protocol (ET-LTP) protocol can effectively deal with the congestion that cannot be solved by LTP and get along well with the other coexisting protocols, feasibility of the improved scheme of LTP is verified in this paper
Summary
The vast space is a mystery for human beings, attracting the attention of scientists and experts, people explore the deep space with persistence to build a basic framework for deep space communication and provide services for the communications and navigation requirements between spacecrafts and satellites [1]. Once receiver collects data packet marked by ECN, it would give a response to sender immediately, sender would calculate the expected transmission speed from the equation according to the congestion event rate and other information, carried by feedback data packet, which consists of expected speed estimated by receiver so that the transmission speed will be corrected within the double expected speed.
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