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This paper develops a quite simple yet very accurate mathematical model for performance analysis of 802.11 ad hoc networks with traffic flow diversity (i.e., packet size and arrival rate diversity). The results show that 802.11 ad hoc networks can achieve very low packet delay and maximum throughput in non-saturated conditions. Furthermore, when the normalized total load is less than the critical...
One of the attractive features of the wireless mesh network is its ability to scale to larger covered area by simply adding more wireless routers. This scalability increases the average number of hops from source to destination and hence it may affect the network performance in terms of delay and throughput. Many solutions have been proposed for wireless mesh networks. Among them the 802.11s proposes...
The multi-access scheme of 802.11 wireless networks imposes difficulties in achieving predictable service quality in multi-hop networks. In such networks, the residual capacity of wireless links should be estimated for resource allocation services such as flow admission control. In this paper, we propose an accurate and non-intrusive method to estimate the residual bandwidth of an 802.11 link. Inputs...
In this paper, we address the issue of transmission power control (TPC) in wireless ad hoc networks. Power control plays an important role in energy saving and network performance enhancement. However, the existing TPC schemes either face the problem of hidden and exposed terminal or have additional hardware requirements. We propose a novel distributed power control protocol, called Receiver Initiated...
In this paper, we propose an adaptive pacing scheme at the link layer for IEEE 802.11 based multihop wireless networks. Our objective is to improve the performance of higher layer protocols without any modifications to them. Our adaptive pacing scheme estimates the four-hop transmission delay in the network path without incurring any additional overheads, and accordingly paces the packets to reduce...
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