MPR Selection to the OLSR Quality of Service in MANET Using Preferred Group Broadcasting

摘要

Optimized link state routing (OLSR) is a proactive routing protocol that works on the mobile ad hoc network (MANET) by updating information on the routing tables regularly. This protocol has characteristics namely its rapid route search, it does not require any centered setting in handling routing process, it based on multi-hop routing, and it adopts the concept of multi-point relay (MPR). However, MPR node selection in standard OLSR has not worked optimally due to the choice of two-hop neighbors for every node. Furthermore, it results in a large number of topology control (TC) messages in broadcasting neighbor nodes. To overcome problems in OLSR performance, the researcher proposed an algorithm of Preferred Group Broadcasting (PGB) to select the MPR node optimally, reducing the excessive packet redundancy, and improving the quality of service (QoS). This algorithm selects the MPR node based on the most active signal grouping in reducing the number of messages or the excessive overhead during the routing process. The results of the simulation using network simulator version two (NS-2) show that OLSR performance using PGB improves the packet delivery ratio (PDR) by 27.35% and throughput by 14.66 Kbps. It decreases the packet loss by 27.28%, delay by 3.40 milliseconds, and topology control by 22 packets compared to standard OLSR.