Patent ID: 7428229
Filing Date: 2008-09-23
Classification: H04L,H04W,Y02D

Abstract:
1. A method for coordinating nodes in an ad hoc communication network, wherein the network includes a node and at least one neighbor, the method performed in the node and comprising: sleeping in a low duty cycle as an idle node; awakening for a wake time, responsive to a schedule, and becoming an active node by registering with a cluster head during each wake time; listening during each wake time for at least one activation request, the activation request sent from the cluster head responsive to congestion or degradation on a communication link; responsive to the at least one activation request, remaining awake and becoming active on the communication link as a relay node for data sessions between a source node and a destination node; and absent the at least one activation request, returning to the sleeping in a low duty cycle as an idle node.