Today internet has become an central part of the people lives. It has a great increasing user community in many fields from transactions in the banking to the online entertainments. There are many wireless technologies which are used for the communication process over the internet. But Wireless Mesh Networks (WMNs) have been proved much promising and it has been widely used as it combines advantages of both Mobile Ad-hoc NETworks (MANETs) and traditional networks. Routing in this WMNs is complex task so routing metrics which have a vital role in the routing process has become an interesting research concept from the last few years.