Expected Transmission Energy Route Metric for Wireless Mesh Senor Networks

Table 1

Airtime cost constants.

Parameter	Value; (802.11a)	Value; (802.11b)	Description
𝑂𝑐𝑎	75 ms	335 ms	Channel access overhead
𝑂𝑝	110 ms	364 ms	Protocol overhead
𝐵𝑡	8224	8224	Number of bits in test frame
𝑟			Current bit rate in use
𝑒𝑝𝑡			Packet error rate at the current bit rate