tokens: A few more examples of metrics used in other studies include the location - dependent contention , such as the Contention - Aware Transmission Time ( CATT ) , Metric of Interference and Channel - switching ( MIC ) , the number of per - link admitted flows e.g. , Load Aware ETT ( LAETT ) , interference and load through passive monitoring in Metric for INterference and channel Diversity ( MIND ) , as well as the load - dependent cost , such as Weighted Cumulative Expected Transmission Time with Load Balancing ( WCETT - LB ) .