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In order to share information among all nodes, an all-to-all-broadcast scheme is needed for situation awareness networks. For this type of distributed sensor network, a directional antenna array, called multi-beam adaptive array (MBAA) is proposed to improve the transmission range and reject the interference. In this paper, an all-to-all-broadcast oriented MAC protocol is designed based on receiver-oriented...
IEEE 802.11 DCF protocol exhibit severe fairness problem in many scenarios. In this paper, the reasons why fairness problem appears is given and proved by simulation. The study reveals that the interference among contending MAC flows is different when fairness problem happens. This paper consider that different interference between MAC flows cause the DCF unfair. A parameter named FI (Fairness Indicator)...
A Flow Driven MAC Protocol(FD-MAC) is a slot based MAC protocol which is designed for long distance wireless multihop transmission. With the flow-driven resource reservation mechanism, FD-MAC protocol is especially suitable to be used for wireless ad hoc network with dynamic traffic pattern. We argue that the Flow Classification Threshold(FCTs) of the protocol are the key parameters to the performance...
Routing problems based on cooperative transmission for multi-hop wireless Ad hoc network have been studied in this paper. Inspired by Multipoint Relay computation, a cooperative routing algorithm is proposed in Ad hoc network, which select cooperative neighbors for cooperative transmission by checking whether the links between the node and its neighbors are symmetric or not. The performances of the...
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