Figure 1From: Opportunistic routing with in-network aggregation for duty-cycled WSNs with delay requirementsBehavior of ORW running on top of asynchronous duty-cycled MAC. Node B and C are in node A’s forwarder set. When node A is sending packets, node B wakes up before node C and receives the packet. Node B replies by sending an ACK to node A, who stops sending packets.Back to article page