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By Henri Dubois-Ferrière, Matthias Grossglauser (auth.), Samuel Pierre, Michel Barbeau, Evangelos Kranakis (eds.)

This booklet constitutes the refereed lawsuits of the second one foreign convention on Ad-Hoc Networks and instant, ADHOC-NOW 2003, held in Montreal, Canada in October 2003.

The 23 revised complete papers and four revised brief papers provided have been rigorously reviewed and chosen from forty two submissions. All present points of ad-hoc networking, cellular, instant, and cooperating communique platforms are addressed together with community architectures, entry keep an eye on and discovery, multicasting protocols, functionality, caliber of carrier, QoS, routing protocols, scalability, defense, and self-configuration.

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Additional resources for Ad-Hoc, Mobile, and Wireless Networks: Second International Conference, ADHOC-NOW2003, Montreal, Canada, October 8-10, 2003. Proceedings

Example text

But in NS2 simulations, a random waypoint model is used, and this model does not result in a uniform node distribution, so this algorithm cannot be applied. e: n1 πr1 2 w1 l 1 = n2 πr2 (5) 2 w2 l 2 where r1,r2 are average radio transmission ranges, w1, w2 and l1,l2 are width and length of the simulation area, and n1,n2 are number of mobile nodes respectively. Based on our simulations with an ideal radio model with 50 nodes in a 1500x300 m area with transmission range of 250m, we calculate the required number of nodes for different β values in Table 2.

Given the large choice of protocols, each with its own strengths, it remains a difficult problem to select the one most appropriate for a given set of network conditions. Routing protocols for MANETs are traditionally evaluated by simulation since few testbeds exist. There is general consensus on the quantitative metrics to use for comparing protocols, namely end-to-end throughput and delay, route acquisition time, percentage of out-of-order delivery, and the efficiency of the protocol in terms of control traffic overhead [4].

3) A packet may take more or less hop counts than the “optimal” number as determined by General Operations Director in NS2, which is based on the ideal environment, with different β values. 0, the mean transmission range will be much longer than 250 m, as listed in Table 2. Even if the shortest path needs 3 hops based on the ideal environment, sometimes the source can send the packet to the destination directly. Especially for DSR, there are more paths shorter than the “shortest” paths pre-calculated in NS2 because of shortening mechanism.

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