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Compressive sensing (CS) can reduce the number of data transmissions and balance the traffic load throughout networks. However, the total number of data transmissions required in CS method is still large. It is observed that there are many zero elements in the measurement matrix. In each round of data transmission in CS method, the sensor nodes corresponding to the zero elements in the measurement...
Due to the packet-fairness property of the 802.11 WLANs, the clients with low rates take longer time to transmit a packet and would reduce the overall network throughput, as well as the per-node throughput of those high data rate clients. We propose a collaborative relay method, which allows high data rate clients to relay traffic for the low data rate clients to improve the network throughput. There...
This paper discusses the QoS topology control problem with consideration of power control and rate adaptation in wireless mesh networks. Our task is to construct a routing forest (a set of trees rooted from the gateway nodes), configure the transmission power of each node, such that the constructed network topology can meet the delivery threshold for all nodes and the system throughput is maximized...
Assume sensor deployment follows the Poisson distribution. For a given partial connectivity requirement ??, 0.5 < ?? < 1, we prove, for a hexagon model, that there exists a critical sensor density ??0, around which the probability that at least 100??% of sensors are connected in the network increases sharply from ?? to 1-?? within a short interval of sensor density ??. The location of ??0 is...
In this paper, we study topology control methods aiming at achieving high throughput for wireless mesh networks. Based on the analysis of the existing topology control methods, such as the shortest path tree method, the load balancing method and the greedy method, we propose a relative-closest connect-first topology control algorithm. In our proposed method, each node has a distance vector to keep...
Existing works on data aggregation in sensor networks usually use a single channel, which results in a long latency due to high interference, especially in high-density networks. In this paper, we present a novel approach to minimize the latency of data aggregation by using partially overlapped channels. We first propose a joint tree construction, channel assignment and scheduling algorithm for this...
In this paper we proposed a topology control algorithm for the single channel wireless mesh network with m directional antennas equipped on each node. The objective of our algorithm is to maximize the traffic delivery ratio from each non-gateway node to gateway nodes, by adjusting the orientations of the directional antennas appropriately. By allowing each antenna connecting to multiple nodes, our...
In this paper we analyze the capacity of wireless mesh networks that use omni or directional antennas. The capacity in our analysis is the end-to-end per-node throughput. Our analysis is based on the assumption that there is only one gateway in the network and all end-users' traffics go through the gateway. Non-gateway nodes are uniformly distributed in a two- dimensional region centered at the gateway...
In this paper we propose a topology control algorithm for the wireless mesh network, where each node is equipped with m non-steerable directional antennas. Our objective is to maximize the minimal traffic delivery ratio from each node to the gateway nodes, by adjusting the orientation of the directional antennas appropriately. We show by simulations that our proposed algorithm improves traffic delivery...
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