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Broadband satellites enable Internet access for remote communities and niche markets such as ships and airplanes. However, their inherent characteristics, such as long delays and limited resources, significantly degrades the user quality-of-experience. In this paper, we propose a novel HTTP Performance Enhancing Proxy (PEP) that accelerates web-browsing and improves the utilization of satellite resources...
Satellite communication has become important in the current global data communication due to its large coverage area. Satellite links are affected by two major concerns: long propagation delays, and relatively high error rates. Standard TCP congestion control variants were not designed to address these challenges. They generally depend on round trip times (RTTs), and hence suffer heavily if the RTTs...
Delay/disruption tolerant networking (DTN) technology offers a new solution to highly stressed communications in space environments, especially those with long link delay and frequent link disruptions in deep space missions. To date, little work has been done in evaluating the effectiveness of the available DTN protocols when they are applied to an interplanetary Internet. In this paper, we present...
The performance of TCP suffers from degradation in satellite network due to long latency, high bit error rate. A design of TCP performance enhancing proxy (PEP) over satellite network is proposed. The network architecture is given based on the PEP, and the key technique is introduced. At last the PEP is validated with OPNET in this paper. The result shows that this PEP can improve the transmission...
While Performance Enhancement Proxy (PEP) is a promising solution for TCP's performance issues over satellite links, it has a serious constraint in terms of a translation table limit of 500 entries that proved to be detrimental when a large number of TCP sessions need to be maintained between endpoints. We experienced one of these cases in Saudi Aramco where web-based drilling applications were establishing...
With the proliferation of the Internet, voice over IP and multimedia communication become more and more important. One of the protocol that facilitated this development is Session Initiation Protocol (SIP). SIP is a signaling protocol which manages the session establishment and termination. It can be based on UDP or TCP at the transport layer. In this paper, the strengths and weaknesses of SIP over...
Next Generation Network (NGN), featured by the merging of Wired network, Wireless network, Internet and Satellites network, is the development trend in future. Challenges brought by the existing protocol communication architecture which has the representative of TCP/IP stack are emerging in NGN. Among kinds of reply technologies, Cross-Layer Design is a new and effective one. However, the present...
The satellite communications are used more and more widely. But these kind of communications have a lot of different characteristics, such as long link delay and high bit error rate. Our research aims to find out the efficient protocol between TCP and SCPS-TP transport protocol through simulation topology method.
High speed satellite communication networks are emerging as part of the future global wireless communication systems. However, existing transmission control protocols for satellite networks do not provide satisfactory performance over high speed satellite links due to their inefficient congestion avoidance algorithms. This paper identifies the reason for low throughput of a widely used protocol space...
Transport protocols used in satellite networks face challenges such as variable link capacity, large propagation delay effects and packet corruption. In this paper a new cross-layer architecture for TCP splitting is proposed in the return link of geostationary satellite networks to improve the TCP performance. This new cross-layer architecture defines the interactions between layers to coordinate...
Multicast research has explored the security challenges faced in group communications. Multicast transport and multicast security need to work in close collaboration to realise a multicast service. However, there has been comparatively little work to combine the two technologies. In this paper the authors is presenting an example of partially integrating timed efficient stream loss-tolerant authentication...
Explicit congestion notification (ECN) is a mechanism that can be used to provide early indication of impending Internet congestion, and as such can be used to reduce the latency and improve the throughput of applications using the Internet. This paper examines the impact of using ECN with quality of service classification for Internet paths that include a satellite delay. Specifically, it provides...
High-speed rail is emerging in the world as an increasingly popular and efficient means of transportation used by a lot of people, who may also need a broadband Internet connection while travelling for their business and leisure. Satellite systems for their intrinsic characteristic, such as global coverage, reduced impact of Doppler effect due to link geometry and flexible bandwidth management, represent...
The future development of broadband satellite systems providing services based on the Internet protocol (IP) needs to be stimulated by means of common standards. This paper presents the ETSI BSM PEP terminal architecture and PEP usage scenarios. In addition this paper shows the benefits of cross-layer improvements, where the TCP traffic sent by STs through an NCC/Gateway that acts as a PEP-spoofer...
In a scenario where people need to travel frequently for their business and leisure, spending a lot of time on high-speed trains, airplanes or ships, it is necessary to provide them a broadband Internet connection while moving. Broadband satellite systems, for their characteristics in terms of coverage and flexibility, can be the best solution for this type of scenarios. Nevertheless, although satellite...
ldquoChallenged Networksrdquo often violate the TCP design key assumption of continuous path availability from the source to the sink node. These networks are the preferred target of Delay/Disruption Tolerant Networking (DTN), which aims at providing a more robust network architecture. Against disruptions, however, even standard TCP offers a certain level of robustness, through its many retransmission...
We present experimental results for the performance of selected voice codecs using the Datagram Congestion Control Protocol (DCCP) with TCP-Friendly Rate Control (TFRC) congestion control mechanism over a satellite link. We evaluate the performance of both constant and variable data rate speech codecs (G.729, G.711 and Speex) for a number of simultaneous calls, using the ITU E-model and identify problem...
Satellite communications are essential to provide Internet access to wide areas, helping bridge the "digital divide". However, long RTTs and the possible presence of losses due to satellite channel errors, severely impair standard TCP performance. To overcome this problem several approaches are possible, including the adoption of enhanced versions of TCP. This paper focuses on these, by...
In this work, we address the performance problems that arise when unicast security protocols IPSEC and SSL are applied for securing the end-to-end communication in hybrid satellite networks. Satellite networks use TCP and HTTP performance-enhancing proxy servers to overcome the adverse effect of the large delay-bandwidth product of the satellite channel. However, the proxy servers cannot function...
Most of Internet applications use the transmission control protocol (TCP) at the transport layer network. When Internet communications involve a satellite link, characteristics such as long propagation delay (GEO and MEO satellite links) and high bit error rates affect greatly TCP performance. In this work, we propose a new transport protocol, called SSTP, to be used in a satellite communication....
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