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This work details a new class of energy efficient and delay bounded data gathering framework viz. generalized intra cluster chaining (GICC) framework for large scale wireless sensor network. The framework extracts the advantages of both purely cluster based and purely chain based data gathering schemes for wireless sensor network without compromising with their drawbacks. Detailed analysis and simulation...
Aggregate scheduling techniques have been developed and deployed to avoid complexities of Integrated Services model. A major breakthrough in this regard is in terms of scheduling with Packet Scale Rate Guarantee. However, fundamental limitation of the method lies in unbounded growth of end-to-end delay, whenever the strict relation between utilization and number of hops traversed, fails. A tighter...
Network traffic has been studied extensively since new findings by Taqqu et. al. (1994), which has shown that network traffic is not memoryless. Such traffic has been called self similar with Long Range Dependence (LRD) and their distribution is commonly known as heavy-tailed. It is very hard to estimate buffer size to protect against overflow in presence of such traffic as packet sizes and their...
IEEE 802.11 is a popular wireless LAN standard and because of its low cost and good bandwidth, it is widely used now a days. Due to the small cell size frequent handoffs may occur while roaming in an area covered by several access points and a high handoff latency may cause disruptions in ongoing communications. To support voice and multimedia applications, handoff latency needs to be within 50 ms...
Aggregation of flows into classes is used to avoid the scalability problems of IntServ model and this requires per-class scheduling decisions. There are number of issues associated with such approach e.g. what will be per-flow guarantee, which flows are to be aggregated together, how to determine service order among multiple classes and within a class etc. DiffServ model is a framework wherein class...
Providing high quality communications service among mobile wireless devices is basically a challenging task in wireless ad hoc networks. In this paper, we propose a route stability based multipath quality of service (QoS) routing (SMQR) protocol for mobile ad hoc networks (MANETs) to support throughput and delay sensitive real-time applications in MANETs. Reliability of QoS-aware path is improved...
Dynamic topology and limited bandwidth of mobile ad hoc networks (MANETs) make end-to-end QoS support an inherently complex and difficult task. Most of the current QoS routing protocols propose routing based on two QoS metrics. This paper introduces a QoS aware on demand routing protocol that uses signal stability as the routing criteria along with other QoS metrics. The proposed QoS Aware Stable...
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