The routing metrics for wired networks are
i. Hop-Count- It is related to the total number of hops between two nodes.
ii. Queuing delay- This corresponds to the load of the link ie. the traffic going on in the line.
For wireless networks the metrics are
i. Hop-Count
ii. RTT(Round Trip Time)
iii. Packet Pair
iv. ETx(Expected Transmission Count)
Hop-Count:
Advantages –
o Easy to evaluate
o Simple
o Little Overhead
Shortcomings –
It does not consider
o Transmit rate
o Load
o Interference
o Packet Loss Rate
RTT:
Since this value is congestion dependent this value needs to be calculated again and again. Probe and Probe Ack are sent between the two neighbours every 500 ms to calculate the Round Trip Time.
i. Hop-Count- It is related to the total number of hops between two nodes.
ii. Queuing delay- This corresponds to the load of the link ie. the traffic going on in the line.
For wireless networks the metrics are
i. Hop-Count
ii. RTT(Round Trip Time)
iii. Packet Pair
iv. ETx(Expected Transmission Count)
Hop-Count:
Advantages –
o Easy to evaluate
o Simple
o Little Overhead
Shortcomings –
It does not consider
o Transmit rate
o Load
o Interference
o Packet Loss Rate
RTT:
Since this value is congestion dependent this value needs to be calculated again and again. Probe and Probe Ack are sent between the two neighbours every 500 ms to calculate the Round Trip Time.
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