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Wi-Fi-based mesh networks have been considered as a viable option to provide wireless coverage for a vast area, such as community-wide or city-wide. However, interference due to multihop transmissions and potential isolated (disconnected) nodes are the major obstacles to achieve high performance. In this paper, we propose a heterogeneous wireless network architecture, consisting of Wi-Fi and WiMAX,...
Previous results show that a node's throughput scales poorly as the network size increases when every node has traffic. However, in many cases, only a fraction of nodes in large networks have data to send or receive at any given time, while other nodes can act as relays/routers. Therefore, in this paper, we study the scaling behavior from a user's viewpoint (a user is a node with traffic). We first...
Energy consumption of communication is a key factor of the lifetimes of wireless sensor networks. This paper presents an energy-efficient routing protocol for wireless sensor network. In the protocol, each sensor node detects the distance between the base station and itself. Then, it calculates a tier ID in according to the distance. A lower tier ID indicates a shorter distance between the base station...
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