Reducing MAC layer handoff latency in IEEE 802.11 wireless LANs
Proceedings of the second international workshop on Mobility management & wireless access protocols
Design and Evaluation of iMesh: An Infrastructure-Mode Wireless Mesh Network
WOWMOM '05 Proceedings of the Sixth IEEE International Symposium on World of Wireless Mobile and Multimedia Networks
Fast handoff for seamless wireless mesh networks
Proceedings of the 4th international conference on Mobile systems, applications and services
IEEE 802.11s wireless mesh networks: Framework and challenges
Ad Hoc Networks
IEEE Transactions on Mobile Computing
Wireless mesh networks: a survey
Computer Networks: The International Journal of Computer and Telecommunications Networking
Inter-gateway cross-layer handoffs in wireless mesh networks
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
A Survey of Mobility Management in Hybrid Wireless Mesh Networks
IEEE Network: The Magazine of Global Internetworking
Computer Networks: The International Journal of Computer and Telecommunications Networking
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Handoff management plays an important role in wireless mesh networks (WMNs) in delivering Quality of Service to mobile users. Inter-gateway (across subnets) movement in WMNs usually requires the handoff support from multilayers and thus causes nonnegligible delays and packet loss. Previous solutions on handoff management in infrastructure WMNs mainly focus on intra-gateway mobility (e.g., single gateway is assumed in IEEE 802.11s WMNs) and exert the reduction of handoff delay so as to reduce packet loss. Furthermore, some handoff issues involved in inter-gateway mobility in WMNs (e.g., the network-layer handoff detection issue) have not been properly addressed. In this paper, we present a novel architectural design, namely Explicit multicast-based (Xcast-based) WMNs (XMesh), to facilitate inter-gateway handoff management. The proposed XMesh architecture enables parallel executions of handoffs from multilayers, in conjunction with a Xcast-based caching mechanism which builds on top of mesh routing protocols to guarantee minimum packet loss during handoffs in WMNs. The required number and optimal placement of special mesh routers that form the XMesh architecture are modeled as a set covering problem which is solved based on a greedy algorithm. A comprehensive simulation study shows that the XMesh architecture enables fast handoffs and re-establishment of session communications in the inter-gateway mobility environment. With both the parallel handoff execution and data caching mechanism, our architecture offers a seamless handoff for supporting real-time applications.