tailieunhanh - Mobil Ad Hoc Networks Protocol Design Part 9

Tham khảo tài liệu 'mobil ad hoc networks protocol design part 9', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 312 Mobile Ad-Hoc Networks Protocol Design 5. If any node leaves from joins to or moves around the network it has to execute the Mobility Handling Algorithm MHA to notify other nodes about this change and to update their own route information in their caches. 6. Repeat Steps 1 to 5 until the whole network is terminated. End of On-Demand Cache Routing. In conclusion this protocol proposed an efficient on-demand routing algorithm called ODCR for route discovery and management and mobility handling. The ODCR algorithm applied the content-addressable and LRU replacement features in L-1 and L-2 caches for route table creation updating and maintenance. The ODCR algorithm with duel-level route caches solved most problems in on-demand routing such as route tables in slow main memory long connection setup delay broken link repairing huge routing overhead for long routes lengthy data packet in source routing sending beacons hello packets periodically control overhead for complicated IDs in data packets to setup TTL time-to-live in a packet or a route path and to update the stale routes in the route table or cache frequently. The simulation results showed that the ODCR algorithm outperforms AODV DSR Dynamic Source Routing and CSOR Cache Scheme in On-Demand Routing in packet delivery rate average end-to-end delay and average routing load Lee2009 . 4. Hybrid routing protocols This type of protocols combines the advantages of proactive and reactive routings. The routing is initially established with some proactively prospected routes and then serves the demand from additionally activated nodes through reactive flooding. The choice for one or the other method requires predetermination for typical cases. The main disadvantages of such algorithms are 1. Advantage depends on amount of nodes activated. 2. Reaction to traffic demand depends on gradient of traffic volume Wiki2010j . Zone Routing Protocol Zone Routing Protocol ZRP was the first hybrid routing protocol with both a .