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IEEE 802.15.4 is the emerging next generation wireless standard designed for low-rate wireless personal area networks (LR-WPAN), which suit wireless sensor networks applications. It attempts to provide a low cost, low power and short range wireless networking. The QoS is more challenging in heterogeneous wireless sensors networks, where a diverse mixture of sensors for monitoring temperature, pressure,...
The statistical behavior of wireless medium access can generally be described by a function that relates the offered traffic to the collision probability and delay. Given a maximum tolerable collision probability and/or delay (quality-of-service constraints), one can derive the maximum admissible offered traffic for a given medium access strategy. In this paper, we describe both a centralized as well...
Flow convergence on particular nodes causes various problems such as degradation in QoS. We describe a new routing method for reducing the maximum number of relay flows on the node that relays maximum flows (called “the maximum number of relay flows”). A full search is required for calculating the optimal algorithm of this problem. Thus, we created an approximate algorithm to calculate a near optimal...
Wireless networks will carry various multimedia applications such as voice, video and data in the future. In order to provide service quality for delay sensitive applications such as voice and video, it is necessary that mobile ad hoc networks (MANETs) support quality of service (QoS) routing in terms of bandwidth and delay. Content-based communication is a competent candidate for such dynamic networks...
In this paper, we study medium-access-control (MAC) protocols with quality-of-service (QoS) support, topology-transparent broadcast scheduling (TTBS), in multihop time-division multiple-access (TDMA) ad hoc networks. TTBS focuses on the QoS provisioning that each node can successfully transfer the same packet to all the other nodes within its communication range simultaneously (broadcast traffic)...
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