Selection diversity forwarding in a multihop packet radio network with fading channel and capture
ACM SIGMOBILE Mobile Computing and Communications Review
ISPAN '00 Proceedings of the 2000 International Symposium on Parallel Architectures, Algorithms and Networks
Exploiting Path Diversity in the Link Layer in Wireless Ad Hoc Networks
WOWMOM '05 Proceedings of the Sixth IEEE International Symposium on World of Wireless Mobile and Multimedia Networks
Comparison of multi-channel MAC protocols
MSWiM '05 Proceedings of the 8th ACM international symposium on Modeling, analysis and simulation of wireless and mobile systems
Ad-Hoc Network Routing Using Co-operative Diversity
AINA '06 Proceedings of the 20th International Conference on Advanced Information Networking and Applications - Volume 01
On Channel Selection Strategies for Multi-Channel MAC Protocols in Wireless Ad Hoc Networks
WIMOB '06 Proceedings of the 2006 IEEE International Conference on Wireless and Mobile Computing, Networking and Communications
Proceedings of the Third international EURO-NGI network of excellence conference on Wireless systems and mobility in next generation internet
Protocol design and throughput analysis of frequency-agile multi-channel medium access control
IEEE Transactions on Wireless Communications
Performance Optimizations for Deploying VoIP Services in Mesh Networks
IEEE Journal on Selected Areas in Communications
Behavioral model for secure group communication in wireless mesh networks
Proceedings of the Sixth Annual Workshop on Cyber Security and Information Intelligence Research
Proceedings of the first ACM international workshop on Practical issues and applications in next generation wireless networks
ACM SIGMOBILE Mobile Computing and Communications Review
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Mesh networking is currently gaining much attention, within both academia and industry. Mesh networking allows cheap and fast deployment of wireless services. It is regarded as a very promising solution for urban deployment scenarios as well as for temporary emergency response situations. Another related promising field is that of ad hoc wireless networking, which consists of mobile nodes that dynamically create and maintain a network without the need for any infrastructure. We propose a solution and architecture for urban mesh ad hoc networks, a network that combines mesh networking with ad hoc networks for urban environments. We present four types of ad hoc mesh and ad hoc mesh networks. The most general one consists of mesh nodes, called mesh points (MP), that act as a type of access point for user nodes (UN). The MPs have at least two interfaces: one which is used to communicate with UNs, and one which is used to maintain the mesh access network and transport data. These two interfaces can basically use any type of technology (IEEE 802.11 a/b/g, WiMax, etc.), and for capacity reasons it is generally regarded that the best solution is to let the mesh interface operate on a separate high-capacity channel or channels. An intricate part of these types of networks are routing and location services. In our solution, UN devices operate in ad hoc mode running an ad hoc routing protocol. This allows UNs that wish to communicate to connect directly in an ad hoc manner, or through an MP. An important question is therefore whether two UNs that wish to communicate should connect through the mesh or connect directly. We show that from a capacity point of view whether a UN should route its packets to the closest available MP, or through a ad hoc network, depends on the environment the network is located, the amount traffic and the type of protocols used. Since MPs need to know where to route packets within the mesh, i.e., locating the MP closest to the destination UN, each UN run a small application that registers the UN to the mesh network. In addition to the above features we have developed a new MAC that quickly queries two candidate nodes, which picks the candidate with the currently best radio conditions. This enable nodes to cope with deep dips in signal strength due to fast fading, a well-known problem in urban environments. We show that this new protocol achieves significantly lower delays. We also show that in dense urban environments performance and battery lifetime can be improved if ad hoc technologies are used.