Low Energy Adaptive Clustering Hierarchy (LEACH) Taekyoung kwon.

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Presentation transcript:

Low Energy Adaptive Clustering Hierarchy (LEACH) Taekyoung kwon

LEACH Adaptive, self-configuring Localized control of data transfer Low-energy medium access Application-specific data access

Dynamic clusters

Distributed cluster formation algorithm

Distributed cluster formation

N: number of total nodes k: number of clusters r: current round P = k/N

On each round, we want N*P cluster heads N N P

LEACH: steady state

Inter-cluster interference

LEACH media access

LEACH with deterministic cluster-head selection

LEACH drawbacks

decision formula with energy

Final decision formula r s : # of consecutive rounds in which a node is not cluster-head

Distributed Clustering in Ad-hoc Sensor Networks -A Hybrid, Energy-Efficient Approach

Ideally N_iter : every step takes t_c time C_prob : # of cluster heads / # of total nodes

realistically Initialize step P_min is inversely proportional to N_iter Repetition step Announce cluster_head msg with cost