Download Ad-Hoc, Mobile and Wireless Networks: 8th International by Adnan Majeed, Saquib Razak, Nael B. Abu-Ghazaleh, Khaled A. PDF

By Adnan Majeed, Saquib Razak, Nael B. Abu-Ghazaleh, Khaled A. Harras (auth.), Pedro M. Ruiz, Jose Joaquin Garcia-Luna-Aceves (eds.)

This ebook constitutes the refereed court cases of the eighth overseas convention on Ad-Hoc, cellular, and instant Networks, ADHOC-NOW 2009, held in Murcia, Spain, in September 2008.

The 24 revised complete papers and the ten brief papers have been rigorously reviewed and chosen from ninety two submissions. The papers take care of advances in Ad-Hoc networks, mesh networks, sensor networks and vehicular networks.

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Extra resources for Ad-Hoc, Mobile and Wireless Networks: 8th International Conference, ADHOC-NOW 2009, Murcia, Spain, September 22-25, 2009 Proceedings

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R. Syrotiuk are selected and deployed randomly, and due to node mobility, channel access behaviour may change frequently. Thus, concurrency among flows is harder to establish and maintain. However, an improvement in total energy consumption still results in a significant increase in throughput per unit of energy. 3 Overhead In our scenarios, the data packet size was 1000 bytes. Since a four-way handshake was employed, a seven byte long hint is transmitted after each control or data packet, as well as introducing additional delay due to the extra SIFS intervals.

Each point is the average of 20 simulation runs. 11 (a) Throughput (Kbytes/s) (b) Energy (Joules) (c) Throughput per unit Energy Fig. 4. Results for the static scenario in Figure 3 Cooperative Signalling 27 in all metrics. 11. This gain comes from the potential concurrency in transmissions of multiple flows in the network when power control is used. 11. This is because of the savings in transmission power; see Table 1 for the maximum and minimum transmission power. 11. 2 A Mobile Wireless Network Scenario Now we consider a mobile wireless network scenario with 50 mobile nodes randomly deployed in an area of 300 m × 300 m square; we use the AODV routing protocol [15].

For example, in Fig. 1(d) the receiver is more than twice the transmission range away from the sender; in this case, even a cooperating node cannot help inform the receiver. In Fig. 1(e), there are two concurrent transmissions that result in a collision at two receivers, where both receivers are in range of each sender. Here, cooperating nodes overhear a collision and cannot help. Although a cooperating node may not always be able to help determine the reason for failure, in the worst case cooperative signalling degrades into traditional feedback.

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