Table:
State or Message	Description a
Candidate	The node is a candidate node
Head	The node is selected as cluster head
Plain	The node is a member node
Compete_Msg	Composed by the ID of sender
Join_Msg	Composed by the ID of sender and the ID of head
Weight_Msg	Composed by the ID of sender, weight, Ea, Eresidual
Schedule_Msg	Head assign slot time for its member nodes

Convert the illustration into Markdown language.

| State or Message | Description a | 
 | --- | --- | 
 | Candidate | The node is a candidate node | 
 | Head | The node is selected as cluster head | 
 | Plain | The node is a member node | 
 | Compete_Msg | Composed by the ID of sender | 
 | Join_Msg | Composed by the ID of sender and the ID of head | 
 | Weight_Msg | Composed by the ID of sender, weight, Ea, Eresidual | 
 | Schedule_Msg | Head assign slot time for its member nodes |