Cross‐layer design vehicle‐aided handover scheme in VANETs

Abstract

The requirement for in-vehicle passengers to access Internet multimedia services has risen recently. As a consequence, Vehicle Ad hoc NETwork (VANET) has gained much attention, and is regarded as a promising solution for providing in-vehicle Internet service through inter-vehicle and infrastructure communication. A new developed wireless network technique, termed WiMAX Mobile Multihop Relay (MMR), provides a good communication framework for a VANET formed from vehicles on high-speed freeways. Applying MMR WiMAX allows some public transportation vehicles to act as relay vehicles (RVs) to provide Internet access to passenger vehicles. However, the standard handover procedure of mobile or MMR WiMAX suffers long delay due to the lack of information about the next RV. This study presents a cross-layer fast handover scheme, called vehicular fast handover scheme (VFHS), where the physical layer information is shared with the MAC layer, to reduce the handover delay. The key idea of VFHS is to utilize oncoming side vehicles (OSVs) to accumulate physical and MAC layers information of passing through RVs and broadcast the information to vehicles that are temporarily disconnected, referred to as disconnected vehicles (DVs). A DV can thus perform a rapid handover when it enters the transmission range of one of approaching RVs. The effectiveness of VFHS is verified using ns2 simulations. Simulation results indicate that VFHS significantly decreases handover latency and packet loss.

An efficient cross layer based channel reservation method for vehicular networks

“…The results shown describes that the proposed work, CCRP, improves the QoS by reducing dropping probability, blocking probability, and handoff latency and performs better when compared with very fast handover scheme (VFHS) and cooperative reservation of service channels (CRaSCH) .…”

ADMB: Application‐driven multihop broadcast for vehicular networks

“…Ding et al 23 studied cross-layer routing by applying cooperative transmission, and a new strategy of path selection was proposed to achieve a better trade-off between the transmission power consumption and end-to-end reliability. Chiu et al 24 presented a cross-layer fast handover scheme, called vehicular fast handover scheme, where the physical layer information is shared with the MAC layer, to reduce the handover delay. Quadros et al 25 proposed a cross-layer quality of experience-driven receiver-based broadcast mechanism for vehicular ad hoc networks, which is modularly coupled to statistical routing protocols to offer quality of experience-aware and video-related parameters for the relay node selection and backbone maintenance.…”

On-road video delivery with integrated heterogeneous wireless networks

“…Besides video delivery over vehicular networks, other research problems in VANET filed include broadcast information propagation [13], Wireless Access in Vehicular Environment (WAVE) protocol [14], data aggregation [15], security issue [16], application [17], MAC mechanism [18], handover issue [19], transport layer solution in hybrid network [21], etc.…”