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Table 1 Messages definition

From: An energy-efficient sleep scheduling mechanism with similarity measure for wireless sensor networks

Message Description
comp_MSG Contains the candidate CH ID and residual energy
temp_CH_msg Contains neighbor candidate CH information
sus_MSG Nodes succeeding to be elected as CH send this message
quit_MSG Nodes failing to be elected as CH send this message
join_ MSG Member nodes search for the closest CH to ask for joining
TDMA_msg CHs allocate time intervals to member nodes and form a scheduling arrangement
mornitor_MSG Packages include CH identity, sequence and sampled data
mornitor_MSG_ACK Acknowledgement for mornitor_MSG
attention_MSG Attention message to member nodes
sched_MSG Notify the nodes being scheduled to dormant state in the next round
sched_MSG_ACK Acknowledgement for sched_MSG