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This paper proposes a multi-channel token ring protocol (MCTRP) for inter-vehicle communications (IVC). With MCTRP, the emergency messages can be quickly disseminated with bounded delay, and the desired quality-of-service (QoS) for multimedia traffic can be provided with limited hardware requirement and signaling cost. In addition, MCTRP ensures that all nodes have an equal opportunity to transmit...
In this paper, a novel cluster based adaptive MAC protocol for wireless sensor networks (WSN) is proposed, which is based on clustering network topology. In the proposed MAC protocol, sensor nodes can adjust the duty cycle freely according to traffic information collected by cluster head node. Meanwhile, by exploiting cross-layer routing information, sensor nodes can reduce the active period if no...
In this paper, we propose a variable packet length adaptive MAC Protocol (VPLA-MAC) for wireless sensor networks. VPLA-MAC is designed for clustering hierarchy networks based on the routing information collected from sensor nodes. A sensor node in cluster sends packet length and routing information to cluster head node, this cluster head node calculates the cycle length and selects nodes for data...
In this paper, we propose TA-MAC, a duty cycle MAC protocol with traffic adaptive for sensor networks. Through dynamically increasing extra transmission cycle in original basic cycle, TA-MAC can forward more packets in single cycle when traffic loads increase. The simulation results in ns-2 shows that our protocol achieves lower end-to-end delivery latency over S-MAC and the mean time, energy efficiency...
With the capability of supporting very high data rate services in a short range, ultra-wideband (UWB) technology is appealing to multimedia applications in future wireless personal area networks (WPANs) and broadband home networks. However, the WPAN medium access control (MAC) protocol in IEEE 802.15.3 standard was originally designed for narrowband communication networks, without considering any...
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