Satellitenkommunikation

Novel Handover Techniques for Smart Gateway Diversity



Current satellite systems’ capacities vary from 10 Gbps to 100 Gbps. Considering the future traffic demands, the raw capacity should approach a Terabit/s by 2020 to meet these demands. Hence, the migration to Ka band or even to Q/V bands is considered a necessity. This means that the feeder links should operate at least in Q/V band while the user-terminal links in Ka band. But migrating to these higher bands in order to have access to more available spectrum, where the signal experiences higher attenuation, especially for the Q/V band feeder links, the system is thus more vulnerable to rain over the gateways. As a results, the loss of a gateway communications affects all the users who are connected through it. Services such as teleconference and telemedicine, which are subject to high availability requirements, are more susceptible. It is envisaged that future systems may inter/connect gateways to allow traffic routing between them, a so called ’Smart Gateway diversity’ scheme. To this end, performing traditional handover between any two gateways will lead to packet loss, which in turn will result in system performance degradation.

The aim of this thesis is to study new handover techniques based on cutting-edge technologies in communication networks. This study will result in seamless handover between gateways, which will enhance the overall system performance.

The expected output of this task is system design and protocol development. Further, the overall system performance should be analyzed.

Tasks

System Analysis, protocol development, and evaluation.

Qualification

  • Background knowledge of radio communications systems and communications networks
  • Background knowledge of satellite communications - desired
  • Programming Languages: C/C++, Matlab
  • Fluency in English

Duration

6 - 8 month

Start

immediately


Offer valid till

01.06.2013


Kontakt
Muhammad Muhammad
Deutsches Zentrum für Luft- und Raumfahrt (DLR)

Institut für Kommunikation und Navigation
, Satellitennetze
Tel: +49 8153 28-2806

Fax: +49 8153 28-2844

E-Mail: muhammad.muhammad@dlr.de
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