Optimized handover and resource management: an 802.21‐based scheme to optimize handover and resource management in hybrid satellite‐terrestrial networks |
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Authors: | Riadh Dhaou Ryad Ben‐El‐Kezadri Julien Fasson Fabrice Arnal Emmanuel Dubois Patrick Gelard |
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Affiliation: | 1. INPT‐ENSEEIHT/IRIT, , F‐31071 Toulouse Cedex 7, France;2. CRISTAL, University of Manouba 2010, , Tunisia;3. Thales Alenia Space, , 31037 Toulouse Cedex, France;4. Centre National d'Etudes Spatiales, , 31401 Toulouse Cedex 9, France |
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Abstract: | Satellite communications can provide fourth generation (4G) networks with large‐scale coverage. However, their integration to 4G is challenging because satellite networks have not been designed with handover in mind. The setup of satellite links takes time, and so, handovers must be anticipated long before. This paper proposes a generic scheme based on the Institute of Electrical and Electronics Engineers 802.21 standard to optimize handover and resource management in hybrid satellite‐terrestrial networks. Our solution, namely optimized handover and resource management (OHRM), uses the terrestrial interface to prepare handover, which greatly speeds up the establishment of the satellite link. We propose two mechanisms to minimize the waste of bandwidth due to wrong handover predictions. First, we leverage the support of 802.21 in the terrestrial access network to shorten the path of the signaling messages towards the satellite resource manager. Second, we cancel the restoration of the satellite resources when the terrestrial link rolls back. We use OHRM to interconnect a digital video broadcasting and a wireless 4G terrestrial network. However for the simulation tool, we use a WiMAX as the terrestrial technology to illustrate the schemes. The simulation results show that OHRM minimizes the handover delay and the signaling overhead in the terrestrial and satellite networks. Copyright © 2013 John Wiley & Sons, Ltd. |
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Keywords: | hybrid satellite‐terrestrial network terrestrial network handover 802 21 MIH resource management DAMA |
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