Abstract
Multi-hop relay technology based on IEEE 802.16j has been introduced in vehicular networks, where a group of mobile stations (MSs) is within a mobile relay station (MRS). MRS is usually fixed on a large vehicle and it can help significantly reduce signaling overhead during group handover (GHO) process for every MSs in moving vehicles. This paper proposes a Markov chain-based analytical model to evaluate the overall performance of GHO for IEEE 802.16j-enabled vehicular networks in comparison with single handover (SHO). In particular, a channel borrowing mechanism is proposed to facilitate the effective operation of GHO. The simulations are conducted in terms of handover calls blocking probability using SHO and GHO schemes.
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