Global ETD Search

1	Multicast Link Repair Strategy with MAODV in Wireless Ad Hoc Networks Chen, Li-hong 27 June 2007 (has links) MAODV is a multicast version of AODV, a routing protocol in wireless Ad Hoc network. MAODV can use the same control packets as in AODV. Although MAODV can provide more efficient path, its ineffective link repair scheme may drastically decrease PDR (Packet Delivery Ratio) in the situation of node mobility. This ineffective repair scheme also increases redundant control overhead and the probability of packet collision. In this Thesis, a new link repair scheme, MLRS (Multicast Link Repair Strategy), based on the MAODV, is proposed. The main characteristic of MLRS is Local Repair which allows upstream node of a broken link to do the repair. In Local Repair, we add the IP address of a broken downstream node in the control packet. The upstream node of a broken link will broadcast the control packet. Any node that receives the control packet can determine if its upstream link is broken. The similar Local Repair scheme is applied to the upstream node until a branch node is reached. We use a modified GRPH packet to deliver the information of hop count from a branch node to all the nodes on the multicast tree. A node that receives the GRPH can estimate the duration of Local Repair. For the purpose of evaluation, we use NS-2 to simulate the MLRS. We classify the multicast tree topology with different degrees to analyze their effects on the MLRS. The simulation results show that the MLRS increases the PDR of fast-moving nodes and it also reduces the control overhead. Moreover, the MLRS increases the PDR of broken nodes due to upstream node mobility. MAODV Ad Hoc Multicast Local Repair Tree Degree
2	Návrh, realizace a simulace síťových protokolů v NS2 / Design, realization and simulation of network protocols in NS2 Zvolenský, Daniel January 2010 (has links) The aim of this work is to become familiar with simulation environment Network Simulator 2, study the problems of sensor networks and their support in the simulator and implement the selected protocol and verify its funcitonality in a practical simulation.
3	Analýza multicastových protokolů pro WSN / Analysis of multicast protocols of wirelles sensor network Krajíček, Tomáš January 2011 (has links) This work deals with the issue of multicast traffic over ZigBee wireless network and implementation of corresponding protocols in to MATLAB background, further with realisation of multicast data transmission, consequential energy performance evaluation and comparation of particular protocols.
4	Novel multicast protocols in ad-hoc networks Astier, Eric January 2008 (has links) Mémoire numérisé par la Division de la gestion de documents et des archives de l'Université de Montréal. Manet Noeuds mobiles AODV MAODV Multicast Réseau Ad-hoc NS-2 RSIDS MOBIC ILBH GRIDS Prise en compte de l'énergie Mobilité PUMA CPUMA MODA ROMANT Centralisation du noyau MANET Mobile nodes AODV MAODV Multicast Ad Hoc Networks NS-2 PAssive clusterin RSIDS MOBIC ILBH GRIDS Energy aware Mobility PUMA CPUMA MODA ROMANT Centering Core
5	Novel multicast protocols in ad-hoc networks Astier, Eric January 2008 (has links) Mémoire numérisé par la Division de la gestion de documents et des archives de l'Université de Montréal Manet Noeuds mobiles AODV MAODV Multicast Réseau Ad-hoc NS-2 RSIDS MOBIC ILBH GRIDS Prise en compte de l'énergie Mobilité PUMA CPUMA MODA ROMANT Centralisation du noyau MANET Mobile nodes AODV MAODV Multicast Ad Hoc Networks NS-2 PAssive clusterin RSIDS MOBIC ILBH GRIDS Energy aware Mobility PUMA CPUMA MODA ROMANT Centering Core

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