Future Low Earth Orbit (LEO) satellite networks are envisioned as distributed architectures of autonomous data processing nodes. Such ad hoc networks should deliver reliable communication channels for control commands and data among ground stations and satellites minimizing delay and power. The LEO satellite networks are different from the generic ad hoc scenario. In this paper, we first analyz...

The satellite communication data traffic is increasing dramatically over the coming years. High throughput multibeam satellite networks in Ka band are potentially able to accommodate the upcoming high data rate demands. However, there is only 500 MHz of exclusive band for download and the same amount for upload. This spectrum shortage impose a barrier in order to satisfy the increasing demands....

[email protected] ABSTRACT The Transmission Control Protocol (TCP) is efficient on wired networks, but provides poor performance on satellite networks due to the specific characteristics of satellite links. In this paper, we present the experiments results for a combined approach of a selected set of state-of-art TCP enhancements in conjunction with link layer enhancements. Link laye...

although the LEO constellation has dynamic satellite network topology, the topology changes are predictable and periodic. Based on the characteristics above, a new simple change adaptive routing algorithm (SCARA) is proposed for satellite IP networks. SCARA uses simple rules to decide the next hop. The rules are 1) using only two possible directions to reduce the routing path; 2) assigning high...

In recent years, there has been increasing interest in interconnecting satellite and ATM networks because both share common characteristics of the ability to provide bandwidth-on-demand and flexibility of integrating voice, video and data services. There are several new satellite constellation proposals that support multimedia service and transport ATM traffic. For a successful implementation o...

Participation in social organizations such as team sports, volunteer and religious organizations has been diminishing over the past few decades (Putnam, 2001). One reason for this decline is television (Putnam, 1995). Instead of going to bars or bowling alleys after work – places where people can form new relationships and expand their social networks – people instead go home to watch the lates...

Due to population distribution and economic flourish diversity, the low earth orbit (LEO) satellite network carries unbalanced traffic load, which leads that parts of satellite links are congested while others are underutilized. Furthermore, the congested inter-satellite links result in high queuing delay and packet dropping ratio. To ensure an intelligent scheduling of traffic over entire sate...

The rapid growth of Internet-based applications pushes broadband satellite networks to carry on IP traffic. In previously proposed connectionless routing schemes in satellite networks, the metrics used to calculate the paths do not reflect the total delay a packet may experience. In this paper, a new Satellite Grouping and Routing Protocol (SGRP) is developed. In each snapshot period, SGRP divi...

The use of on-board switches for space applications is not yet widespread because efficient switches for space applications do not exit yet. Unlike terrestrial switches, basically gigabit switches with almost unlimited buffer capacity, switches used inside a satellite payload suffer from the constraints of the space environment and from the following limitations: weight, power consumption, buff...