International Journal of Satellite Communications and Networking

Cover image for Vol. 30 Issue 6

November/December 2012

Volume 30, Issue 6

Pages 235–275

  1. Research Articles

    1. Top of page
    2. Research Articles
    1. Transport layer enhancements on a satellite-based mobile broadband system for high-speed trains (pages 235–249)

      Michele Luglio, Cesare Roseti and Francesco Zampognaro

      Version of Record online: 27 SEP 2012 | DOI: 10.1002/sat.1014

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      This paper addresses a challenging satellite-based communication scenario to provide a broadband and uninterrupted Internet access over high-speed trains. Combination of recent satellite standards, a network mobility protocol and an innovative transport protocol, named TCP Noordwijk, is proposed to achieve good performance. Simulation results confirm the effectiveness of the proposed scheme in different system configurations.

    2. Joint signal-labeling optimization under peak power constraint (pages 251–263)

      F. Kayhan and G. Montorsi

      Version of Record online: 13 SEP 2012 | DOI: 10.1002/sat.1016

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      We introduce an algorithm for jointly optimizing two-dimensional constellations and their binary labeling by maximizing the symmetric and pragmatic capacity. The algorithm can be applied with constraints on both the peak power and the average and peak power of the constellation; thus, it allows to design constellations also for satellite systems where maximum instantaneous power is bounded by the on-board power amplifier characteristics. Our optimized constellations perform up to 0.6 dB better than the optimized 4 + 12 + 16 − APSK adopted in the digital video broadcasting (DVB-S2) standard.

    3. Design and validation of a novel space–earth integrated network management protocol and its simulation (pages 265–275)

      Jianli Zhao and Qiuxia Sun

      Version of Record online: 5 OCT 2012 | DOI: 10.1002/sat.1018

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      A new SEIN (space-earth integrated network) network management protocol is given in this paper. The logical correctness of the protocol is verified using Petri net, and five management primitives are designed that can be compatible to traditional network protocols with its gateway. By the simulation of the protocol, it shows the merit of a short-length protocol data unit and speedy response time, which is good to the high delay and limited bandwidth of the SEIN.