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Analysis of Routing Metrics for Wireless Mesh Networks

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Presentation on theme: "Analysis of Routing Metrics for Wireless Mesh Networks"— Presentation transcript:

1 Analysis of Routing Metrics for Wireless Mesh Networks
To build Wireless Mesh Network To Investigate wireless link characteristics Whether link abstraction exists? What is the effect of interference? To Implement of ETT inside ‘OLSRD’ To analyze ETX and ETT What is the end-end delay, throughput? What is the effect of bandwidth? How interference plays its role here?

2 Accomplishments and Contributions
There exists a considerable correlation between packet error rate and received signal strength. We attribute the high error rate to external interference. ETT outperforms ETX. Unless, the bandwidth of a path compensates for the interference effect, ETT chooses the same path as that of ETX. Characterization of a wireless link Implementation of ETT in ‘OLSRD’ Analysis of metrics in terms of delay, throughput and paths taken Effect of interference on ETT and ETX

3 Architecture

4 Network set up Transmit Power Transmit Rate Number of packets to send
Duration of experiment Received Signal Strength at the receiver External Interference at the receiver Enabling IP forwarding Source of external interference Metrics (delay, throughput) for analysis

5 Link Layer Abstraction
There exists a considerable correlation between packet error rate and received signal strength. We attribute the high error rate to external interference.

6 Effect of packet size With increase in packet size, the probability of packet being corrupted increases.

7 Routing metrics : Delay and Throughput
ETT outperforms ETX in terms of delay and throughput given the same networking scenario.

8 Convergence of routing metrics
ETT value takes into consideration the bandwidth and thus is able to identify the lower expected transmission time link.

9 Paths taken by routing metrics
Packets get routed through intermediate node operating at 5.5Mbps taking advantage of ETT which considers bandwidth to calculate metric value. Unless, bandwidth compensates of interference ETT ends up choosing the same hop as ETX.

10 Lessons learnt and Future Work
Taking wireless measurements is non-trivial job. Hands on experience of handling wireless devices and tools More number of hops WCETT and interference aware routing Deployment and applications

11 Video Surveillance – WMN
I track SBI ATM IIT Main Gate Branch Stop Show I-card When is the next tum-tum? He can’t stop me and let cow go. Security Center


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