US 10,462,844 B2
Dynamic packet relay apparatus and method for sensor network
Geon Min Yeo, Daejeon-si (KR); Young Il Kim, Daejeon-si (KR); Yong Tae Lee, Daejeon-si (KR); Dae Geun Park, Daejeon-si (KR); Sun Hwa Lim, Daejeon-si (KR); and Won Ryu, Seoul (KR)
Assigned to ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon-si (KR)
Filed by Electronics and Telecommunications Research Institute, Daejeon-si (KR)
Filed on Mar. 16, 2016, as Appl. No. 15/71,721.
Claims priority of application No. 10-2015-0036158 (KR), filed on Mar. 16, 2015.
Prior Publication US 2016/0277948 A1, Sep. 22, 2016
Int. Cl. H04W 84/20 (2009.01); H04L 29/06 (2006.01); H04W 4/70 (2018.01); H04L 29/14 (2006.01); H04W 40/24 (2009.01); H04W 88/04 (2009.01); H04B 7/155 (2006.01); H04W 40/22 (2009.01)
CPC H04W 84/20 (2013.01) [H04L 69/22 (2013.01); H04L 69/40 (2013.01); H04W 4/70 (2018.02); H04W 40/248 (2013.01); H04B 7/155 (2013.01); H04W 40/22 (2013.01); H04W 88/04 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A dynamic packet relay method of a personal area network (PAN) coordinator and a device associated with the PAN coordinator in a sensor network, the dynamic packet relay method comprising:
receiving, at the PAN coordinator, a Child_Register message that includes information about a device associated with a coordinator and building or updating a network hierarchical structure;
monitoring, at the PAN coordinator, reception of a packet or a beacon from the coordinator and determining whether the coordinator is defective or not;
in response to a determination that the coordinator is defective, changing, at the PAN coordinator, a current coordinator to one of devices belonging to a PAN as a new coordinator
wherein during an inactive period of the RAN coordinator, the device associated with the coordinator transmits a packet to the coordinator and receives a beacon from the coordinator, and
wherein, when the coordinator is defective, one of the devices belonging to the PAN that received the packet transmitted during the inactive period of the PAN coordinator is determined as the new coordinator.