Tham khảo tài liệu 'mobile ad hoc networks protocol design part 4', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 112 Mobile Ad-Hoc Networks Protocol Design maximum speed Fig. 7. The reduced need for retransmissions gained from more reliable routing would compensate the higher individual end-to-end latency of packets. Fig. 8. The power consumption-throughput ratio Joule byte gives an indication of the energetic cost of the network lower is better . Scenario 2 obstructed case The environment where a MANET operates can affect packet reception leading to a worst routing performance than expected as predicted by the use of ideal unobstructed environments. To evaluate LDR under more realistic assumptions we consider the field with obstacles . buildings represented in Figure 11. The scenario hosts a hypothetical rescue operation Towards Reliable Mobile Ad Hoc Networks 113 Fig. 9. Delivery ratio as a function of the sensor density in sensors per square meter . A larger number of sensors can produce more accurate localization for mobiles which can directly benefit the reliability of MANET routes. Fig. 10. Energy consumed per delivered byte as a function of the sensor density in sensors per square meter in the scenario. where a number of sensors could have been deployed to gather information relevant for the rescue efforts and at the same time help to localize mobiles. The mobiles on the other hand are carried by the rescuers that need to work on the area. As in the previous case we are interested in observing the route reliability of a test traffic flow modeled by a constant bit rate transmission of 40 Kbps between two distant stationary nodes. For this second scenario we consider 50 MANET nodes 48 mobile on a 300x200m field. A set of 400 sensor nodes are as well randomly .
