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Broadcast is an important operation in wireless networks where control information is usually propagated as broadcasts for the realization of most networking protocols. In traditional ad hoc networks, broadcasts are conducted on a common channel which is shared by all nodes in the network. However, in cognitive radio (CR) networks, unlicensed users may observe heterogeneous spectrum availability which...
The expansion of wireless network has been a very attractive area of research. Many researches focus on the performance of TCP over wireless environment. This paper presents the simulation analysis of rate-based pacing TCP with the delayed acknowledgement enable and disable strategies in the wireless multi-hop network. We find out how good the delayed acknowledgement (ACK) strategy affects rate-based...
Flooding time synchronization protocol (FTSP) is an extendable, robust and steady protocol, which has high synchronization precision in wireless sensor networks. This paper improves the traditional FTSP, according to the characteristics of industrial wireless sensor networks. The key idea is that the node should avoid transmitting the time synchronization message with the rootID and seqNum, which...
In this paper, we outline a framework for achieving high data rate connectivity in a multi-hop vehicular network. The data streams are sent to the receiver on the highest data rate path from the source vehicles. The method does not rely upon a location service for obtaining position information. Moreover, as the source and the receivers move from one position to the other, the paths are recomputed...
As part of 3G WCDMA, the Radio Link Control (RLC) protocol is a layer 2 protocol that provides transport services between User Equipment (UE) and the Radio Access Network (RAN). Three transport modes of operation are provided: Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM). In a satellite system, the long propagation delay between the UE and the RAN make the proper configuration...
In this paper, we provide a saturation throughput analysis of the IEEE 802.11 protocol at the data link layer by including the impact of both transmission channel and capture effects in Rayleigh fading environment. Impacts of both non-ideal channel and capture effects, specially in an environment of high interference, become important in terms of the actual observed throughput. As far as the 4-way...
Three applications in wireless networks where model-free stochastic learning is applicable, are discussed. The learning based optimization problems are formulated and simulation results are presented. Some open issues are also discussed.
Wireless sensor networks consist of a large number sensors spread across a given geographical area. Each sensor has its own communication capability as well as certain level of intelligence for signal processing and networking. As the sensor nodes are densely populated, communication range requirement for these nodes is smaller. After signal detection, a number of sensor nodes communicate over the...
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