
108 ◾ Marcello Caleffi and Luigi Paura
© 2011 by Taylor & Francis Group, LLC
More specically, Table4.1 compares the strategies adopted by the dierent
protocols for each task, which are candidate selection, forwarder election, respon-
sibility transfer, and duplicate transmission avoidance. With respect to candidate
election, all the considered protocols adopt an ETX-based strategy. However, only
Table4.1 Basic Characteristics of the Considered Protocols
Protocol
Candidate
Selection
Forwarder
Election
Responsibility
Transfer
Duplicate Tx
Avoidance
ExOR Fixed at the
sender side
according to
the ETX metric
Established at
the sender side ...