An improved QoS based routing in available bandwidth measurement using logarithmic backoff algorithm in MANets

Sumathi, N.; Thanamani, Antony Selvadoss

doi:10.1109/icadiwt.2009.5273911

Cited by 1 publication

(1 citation statement)

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“…Mobile nodes calculate the number of idle time slots between priori and current successful transmission. Log based backoff algorithm introduced in [10,17] uses logarithm of current backoff time to calculate next backoff. The difference between two backoff timers is small.…”

Section: Related Workmentioning

confidence: 99%

Pipelined backoff scheme for bandwidth measurement in QoS enabled routing towards scalability for MANets

Sumathi¹,

Thanamani

2010

Proceedings of the 1st Amrita ACM-W Celebration on Women in Computing in India

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MANets are very sensitive to control overhead packets due to its limited capacity. If available bandwidth is not accurately estimated, nodes will accept extra QoS requests and network will be overloaded. To improve the available bandwidth and to reduce the control overhead associated with the backoff scheme employed in MAC (Medium Access Control) layer; pipelined concept is applied to backoff procedure. Pipelined process also reduces collision probability. When the medium is busy, remaining nodes start the contention procedure in parallel for the next packet transmission. This reduces the channel waiting time. Bandwidth loss due to collision, pipelined backoff and idle time synchronization are estimated and final available bandwidth is calculated. This bandwidth measurement algorithm is integrated into routing protocol called enhanced QoS AODV (Quality of Service Ad hoc On demand Distance Vector) to find the best route based on bandwidth constraint. Simulation results show that the proposed algorithm improves the performance of the network in terms of throughput, packet delivery ratio, effective bandwidth utilization, energy consumption for different number of nodes.

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Section: Related Workmentioning

confidence: 99%