Patent ID: 8630222
Filing Date: 2014-01-14
Classification: H04W,Y02D

Abstract:
1. A method for routing data packets in an event-driven and delay-constrained wireless sensor network (WSN) including a plurality of nodes, the method comprising: receiving, at a first node, a data packet; waiting for at least one potential next-hop relay node to wake up; determining whether a potential next-hop relay node that wakes up is a current-best next-hop candidate; and forwarding the data packet to the current-best next-hop candidate after a relay-selection stopping time, wherein the relay-selection stopping time is based on an estimation of a forwarding energy consumption (FEC) that would be incurred by forwarding the data packet through the current-best next-hop candidate and an expected waiting cost that would be incurred by waiting for at least one additional potential next-hop relay node to wake up; wherein the relay-selection stopping time is further based on an end-to-end delay constraint.