Table 2: Messages for energy balancing algorithm.

Name Attributes Remark EPR Sender.ID  Sender.En By EPR, nodes who need energy protection can send this protection request to the root EPN Sender.ID By EPN, nodes who need energy protection can notify its children of this request EPNR Sender.ID Reply for EPN EPB EPR.ID  EPR.En After making decision on nodes’ energy protection requests, the root can broadcast the decision to the network