Optimized handover and resource management: an 802.21‐based scheme to optimize handover and resource management in hybrid satellite‐terrestrial networks

Abstract

OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao.univ-toulouse.fr/ Eprints ID : 12665 SUMMARYSatellite 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.

Optimization of hybrid broadcast/broadband networks for the delivery of linear services using stochastic geometry

“…The problem of handover and proper resource management was tackled in [182], where authors proposed a scheme based on the IEEE 802.21 standard. Authors in [183] proposed dynamic, context ware bandwidth allocation scheme in the frequency sharing scenario to face the challenges introduced by the mobile nature of the users.…”

Convergence of Satellite and Terrestrial Networks: A Comprehensive Survey

“…As the setup of the satellite link would take time, the handover is usually predicted in advance, wrong predictions will cost a waste of bandwidth. To deal with the problem, a handoff scheme is proposed in [170]. The results show that the scheme minimizes the delay and reduces the bandwidth cost.…”