TAILIEUCHUNG - Mobil Ad Hoc Networks Protocol Design Part 7

Tham khảo tài liệu 'mobil ad hoc networks protocol design part 7', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 232 Mobile Ad-Hoc Networks Protocol Design MPPM-Error packet. The receiver node on receiving the MPPM-Error packet discards all the LUVs and does not generate any new MPPM. After the MPPM-timer expires the multicast source initiates a new global broadcast-based tree discovery procedure. 5. Simulation performance study of NR-MLPBR and R-MLPBR The network dimension used is a 1000m x 1000m square network. The transmission range of each node is assumed to be 250m. The number of nodes used in the network is 25 and 75 nodes representing networks of low and high density with an average distribution of 5 and 15 neighbors per node respectively. Initially nodes are uniformly randomly distributed in the network. We compare the performance of NR-MLPBR and R-MLPBR with that of the minimum-hop based Multicast Extension of Ad hoc On-demand Distance Vector MAODV routing protocol Royer Perkins 1999 and the minimum-link based Bandwidth Efficient Multicast Routing Protocol BEMRP Ozaki et. al. 2001 . We implemented all of these four multicast routing protocols in ns-2. The broadcast tree discovery strategy employed is the default flooding approach. The node mobility model used is the Random Waypoint model with each node starts moving from an arbitrary location to a randomly selected destination location at a speed uniformly distributed in the range 0 . vma c . The vmax values used are 10 m s 30 m s and 50 m s representing scenarios of low moderate and high node mobility respectively. Pause time is 0 seconds. Simulations are conducted with a multicast group size of 2 4 small size 8 12 moderate size and 24 larger size receiver nodes. For each group size we generated 5 lists of receiver nodes and simulations were conducted with each of them. Traffic sources are constant bit rate CBR . Data packets are 512 bytes in size and the packet sending rate is 4 data packets second. The multicast session continues until the end of the simulation time which is 1000 seconds. The performance metrics .

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