Effect of distributed backoff mechanism to simple autonomous active period selection control in cluster-tree type IEEE 802.15.4 WSNs with cluster mobility

2013 ◽  
Author(s):  
Kazuo Mori ◽  
Katsuhiro Naito ◽  
Hideo Kobayashi
Keyword(s):  
Ieee 802.15.4 ◽  
Active Period ◽  
Cluster Tree ◽  
Tree Type

Sequential Beacon Scheduling Mechanism for Cluster-Tree WSNs

2012 ◽  
Vol 263-266 ◽  
pp. 932-938
Author(s):  
Hao Ru Su ◽  
Zhi Guo Shi ◽  
Zhi Liang Wang
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Ieee 802.15.4 ◽  
Wireless Sensor ◽  
Delivery Ratio ◽  
Cluster Tree ◽  
Collision Problem ◽  
Interference Range ◽  
Scheduling Mechanisms ◽  
Simulation Results

To solve the beacon collision problem in IEEE 802.15.4/ZigBee cluster-tree Wireless Sensor Networks, we proposed a Sequential Beacon Scheduling (SBS) mechanism. In this mechanism, the Cluster Headers (CHs) choose the beacon transmission time in a certain order. The CH which finishes the sequence chosen sends out control frame to inform other CHs in its interference range. The simulation results indicate that SBS general has better delivery ratio, latency, and throughput than three other beacon scheduling mechanisms.

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