By Matteo Cesana, Luigi Fratta
ISBN-10: 3540340254
ISBN-13: 9783540340256
This publication constitutes the completely refereed post-proceedings of the second one overseas joint workshops on instant and Mobility and on New developments in community Architectures and prone geared up via the ecu community of Excellence on subsequent new release web, EURO-NGI 2005, held within the Villa Vigoni, Loveno di Menaggio, Como, Italy, in July 2005.
The 19 revised complete examine papers offered including 1 invited speak have been rigorously chosen in the course of rounds of reviewing and development. The papers are geared up in topical sections on instant suggestions (from from instant LANs to advert hoc and sensor networks), mobile structures (models and algorithms), QoS aid in subsequent iteration networks, and peer to see architectures and algorithms.
Read or Download Wireless Systems and Network Architectures in Next Generation Internet: Second International Workshop of the EURO-NGI Network of Excellence, Villa Vigoni, Italy, July 13-15, 2005, Revised Selected Papers PDF
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Extra info for Wireless Systems and Network Architectures in Next Generation Internet: Second International Workshop of the EURO-NGI Network of Excellence, Villa Vigoni, Italy, July 13-15, 2005, Revised Selected Papers
Example text
2 1 2 10 20 Traffic load [pck/s] Fig. 7. Average number of hops versus traffic load To closer investigate the effect of collisions we measured the average number of hops per delivered packet versus interfering traffic (Fig. 7). In case of SiFT without carrier sense information, we observed a slight larger number of hops because collisions may prevent the node in the best position to forward the packet. 2 1 2 10 20 Traffic load [pck/s] Fig. 8. Average number of forwarding nodes versus traffic load The number of forwarding nodes per packet is larger than the number of hops per packet due to multiple forwarding.
A copy of the packet must follow each branch to reach all intended destinations. According to the SiFT scheme, a node, upon reception of a packet carrying a tree trajectory information, computes a timer for each branch in its transmission range. Similarly to the single-stream trajectory case, the node modifies the trajectory information in the packet header including the segments belonging to the corresponding branch. In the example shown in Fig. 2, where the segments of the tree trajectory (dotted lines) are numbered from 1 to 7, a packet transmitted by A is received by B and C.
Similarly, the packet is then forwarded Receiver Oriented Trajectory Based Forwarding 29 by nodes B, and C. Node D, inside the forwarding strip, ends the BFW phase and forwards the packet with the BFW flag off. 2. In the example in Fig. 5, when node A transmits the packet, both nodes B and H receive it and set timers. Node B timer expires first and the packet is forwarded. However, node H, being out of the range of B, will not receive the packet and will forward again the same packet when its timer expires.