Tham khảo tài liệu 'mobil ad hoc networks protocol design part 17', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Theory and Applications of Ad Hoc Networks 631 Fig. 13. Variation of each metric under the Random Direction Mobility Model. zero pause time. Both figures represent these plotting patterns which are independent on speed and density. Compared to Figure 14 the plotted lines of both Figure 13 a and b maintain higher values than that in Figure 14 meaning that the lossless traffics are generated and MNs have reachable adjacent MNs with high density. The Random Direction Mobility Model has an advantage to move widely in the simulation area. a Average propagation rate of RREP b Average number of RREQ adjacent nodes Fig. 14. Variation of each metric under the Random Waypoint Mobility Model. Figure 14 a and b show the same metrics in Figure 13 a and b with the RandomWaypoint Mobility Model with zero pause time. This model with zero pause time causes the largest degradation of values for each speed making the condition of the density waves fall quickly - typically in a condition where the density is greater than 5 nodes 100 100 meters . Flooding features of RREQ Figure 15 a and b respectively shows the average hop count and the elapsed time of propagation under the Random Direction Mobility Model. On the other hand Figure 16 illustrates the same metrics under the Random Waypoint Mobility Model with zero pause time. Compared to respective hop counts in Figure 16 a those in Figure 15 a maintain higher values meaning that these MNs widely spread over the simulation area and require 632 Mobile Ad-Hoc Networks Protocol Design Fig. 15. Flooding features under the Random Direction Mobility Model. 5 4 3 2 a Average hop count c o s co b Elapsed time of Propagation Fig. 16. Flooding features under the Random Waypoint Mobility Model. additional hops. The hop counts of MNs are smaller than those of stationary nodes indicating that the mobility efficiently causes the short hop transmission from source to destination node. The elapsed time of propagation
