@book{pathak_dutta_2013, title={Designing for network and service continuity in wireless mesh networks}, DOI={10.1007/978-1-4614-4627-9}, abstractNote={“Designing for Network and Service Continuity in Wireless Mesh Networks” describes performance predictability of the new wireless mesh network paradigm, and describes considerations in designing netwo}, publisher={New York: Springer}, author={Pathak, P. H. and Dutta, Rudra}, year={2013} } @article{pathak_dutta_2012, title={Centrality-based power control for hot-spot mitigation in multi-hop wireless networks}, volume={35}, ISSN={["1873-703X"]}, DOI={10.1016/j.comcom.2012.01.023}, abstractNote={When shortest path routing is employed in large scale multi-hop wireless networks such as sensor networks, nodes located near the center of the network have to perform disproportionate amount of relaying for others. Nodes in such traffic hot-spots deplete their batteries faster than others due to their high relay load. These traffic hot-spots also adversely affect the network capacity due to increased congestion in the regions. To solve the problem, various divergent routing schemes are used which route the data on center-avoiding divergent routing paths. Though they achieve better load balancing, overall relaying is increased significantly due to their longer routing paths. In this paper, we propose power control as a way for balancing relay load and mitigating hot-spots in wireless sensor networks. Using a heuristic based on the concept of centrality, we show that if we increase the power levels of only the nodes which are expected to relay more packets, significant relay load balancing can be achieved even with shortest path routing. Different from divergent routing schemes, such load balancing strategy is applicable to any arbitrary topology and traffic pattern. With extensive simulations, we show that centrality based power control can drastically increase the network lifetime of sensor networks. We compare its performance with other divergent routing schemes and multiple battery level assignment strategy. Also, it is shown that centrality based power control results into better throughput capacity in many different topologies.}, number={9}, journal={COMPUTER COMMUNICATIONS}, author={Pathak, Parth H. and Dutta, Rudra}, year={2012}, month={May}, pages={1074–1085} } @inproceedings{deuskar_pathak_dutta_2012, title={Packet aggregation based back-pressure scheduling in multi-hop wireless networks}, DOI={10.1109/wcnc.2012.6213972}, abstractNote={The back-pressure based scheduling policy originally proposed by Tassiulas et al. in [1] has shown the potential of solving many fairness and network utilization related problems of wireless multi-hop networks. Recently, the scheduling policy has been adapted in random medium access protocols such as CSMA/CA using prioritization of MAC layer transmissions. Here, MAC priorities are used to provide differentiated services to nodes depending on their queue backlogs. Even though these schemes work well in experiments to emulate back-pressure scheduling, they perform poorly with realistic Internet-type traffic where there is a large variation in packet sizes. In this paper, we propose packet aggregation based back-pressure scheduling which aggressively increases the rates at which back-logged queues are served. Different from other aggregation schemes, the presented scheme utilizes the back-pressure principles for determining when and how much aggregation is performed. We show that this results into increased service rates of back-logged queues which in turn results into high network throughput and utilization. We verify our scheme using simulations and testbed experiments, and show that it achieves significant performance improvements as compared to the original scheme.}, booktitle={2012 ieee wireless communications and networking conference (wcnc)}, author={Deuskar, G. and Pathak, P. H. and Dutta, Rudra}, year={2012}, pages={1263–1268} } @article{pathak_dutta_2011, title={A Survey of Network Design Problems and Joint Design Approaches in Wireless Mesh Networks}, volume={13}, ISSN={["1553-877X"]}, DOI={10.1109/surv.2011.060710.00062}, abstractNote={Over the last decade, the paradigm of Wireless Mesh Networks (WMNs) has matured to a reasonably commonly understood one, and there has been extensive research on various areas related to WMNs such as design, deployment, protocols, performance, etc. The quantity of research being conducted in the area of wireless mesh design has dramatically increased in the past few years, due to increasing interest in this paradigm as its potential for the "last few miles", and the possibility of significant wireless services in metropolitan area networks. This recent work has focused increasingly on joint design problems, together with studies in designing specific aspects of the WMN such as routing, power control etc. in isolation. While excellent surveys and tutorials pertaining to WMNs exist in literature, the explosive growth of research in the area of specific design issues, and especially joint design, has left them behind. Our objective in this paper is to identify the fundamental WMN design problems of interference modeling, power control, topology control, link scheduling, and routing, and provide brief overviews, together with a survey of the recent research on these topics, with special stress on joint design methods. We believe this paper will fulfill an outstanding need in informing the interested student and researcher in getting familiar with this abundant recent research area, and starting research.}, number={3}, journal={IEEE COMMUNICATIONS SURVEYS AND TUTORIALS}, author={Pathak, Parth H. and Dutta, Rudra}, year={2011}, pages={396–428} }