A Stateless Opportunistic Routing Protocol for Underwater Sensor Networks

Table 1

Notations used in Algorithm 1.

Symbol	Definition
	Received packet
	Depth of current receiving node
	Depth of previous hop forwarding node
	Minimum depth in the neighbouring table
	Distance between two neighbouring nodes
	RSSI of received packet
	Table of neighbouring nodes
	Expected packet advancement
	Best candidate node in terms of EPA
	Range of the forwarding area
	ID of best candidate node
	Current time
	Invalidation time of neighbouring node
	Void detecting time of node
	Holding time of packet