Resource Management for High Performance Reliable Wireless Networking

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The core of my research is to develop resource management mechanisms for wireless networks in order to meet user requirements and provide reliable service. Networks must accommodate a wide range of applications. These applications have different resource requirements and different performance expectations. Managing resources in wireless networks is challenging because they have bandwidth, energy and processing constraints and they are more error-prone. Users expect to have reliable, timely delivery of services. However, these services may occur over heterogeneous wired and wireless networks. Therefore, providing network services over wireless networks with quality and reliability is a challenging problem. My research involves designing protocols for resource management for wireless networks. I use simulation, analysis and empirical studies to evaluate the performance of the mechanisms. The following research directions are proposed in this application. In wireless networks, the competition for shared access to the network is a bottleneck to meeting user requirements and providing reliable service. 1) In the 1st proposed project, new flow control and scheduling mechanisms will be designed and evaluated for multi-hop multi-packet reception ad hoc wireless networks. Promising new developments regarding multi-packet reception and multi-packet transmission at the physical layer have the potential to improve interference-related loss at the link layer. However, in previous work, we identified bottleneck issues when existing link layer access protocols are used with this technology for multi-hop wireless networks. With our proposed work, we will be able to reach the full potential of the expanded reception capability of nodes and vastly reduce the bottleneck issues of the link layer in shared environments. 2) Another critical issue with link layer access is the problem of noise interference in urban wireless networks where many wireless networks (and other equipment with interfering signals) co-exist. In the 2nd project, the problem of how nodes classify this outside interference and coordinate this knowledge adaptively with their neighbours to improve communication is addressed. In the future, even more networks and technology will co-exist. Therefore, the mechanisms designed in Project 2 are needed to allow nodes to adapt to different environments and improve reliability performance. 3) In previous work, we have developed a control framework for providing fair access to resources in contention-based link layer wireless protocols. We have also designed virtual topologies for reliable data delivery. In Project 3, this work will be combined to produce comprehensive data delivery mechanisms that include routing, reliable transmission and controlled link access. Mobility and fairness will also be considered. Virtual topologies for placement of resources serve an important role in applications such as mobile cloud computing where timely access and the placement of information is of critical importance. Reliable delivery of data over different wired and wireless networks is required for seamless service to applications. These are the contributions of the proposed work in Project 3. In summary, the ultimate goal of networking is to provide reliable service that meets the needs of the many applications that use the network. In wireless networks, the link layer which handles access to the transmission medium, is a bottleneck to good performance. This research address the issues at this layer by providing mechanisms to significantly improve performance, including increased reliability, increased throughput, reduced delay and increased fairness.