Method for reassigning the role of a wireless node in a wireless network

摘要

The invention is a method for maintaining network lifetime of a wireless network in wireless communication system, said network comprising a plurality of device nodes (A-C, Q, N'). Selected ones of the wireless nodes (A, B, C) have assigned roles (1,2,3, GW) in the wireless network. To improve and maintain network lifetime the method comprises determining (4, 14, 24) a below threshold operating condition of a first sensor node (A) assigned to a first role (1) and re-assigning (5, 19, 29) the first role to another second node (Q) in said network. In other aspects of the invention a method, system and a computer program for carrying out the method are described.