The significant difference between traditional electric power system and smart grid is the cooperative control of power flows and\r\ninformation flows. With a large number of secondary equipments accessed into smart grid, the electric power communication\r\nnetwork becomes one type of ubiquitous data-centric sensor networks. Real-time and reliable multicast services are required for\r\npower system�s stable operation.Multiple Protocols Label Switching (MPLS) with its traffic engineering capabilities has emerged as a\r\npowerful tool to provideQoS support in backbone transmission networks. But previous MPLS unicast andmulticast protocols have\r\ncommon disadvantages, not scalable enough, especially for various intelligent electronic devices following distributed generators\r\nfrequently accessed into smart grid. To overcome the problems of overfull labels consuming bandwidth and prolonging delay,\r\nthis paper proposed a novel labels dispatching mechanism based on Resource ReSerVation Protocol (RSVP) and message injecting\r\nand headward impelling technologies. Based on a set of accurate mathematical analyses and simulation experiments in a typical\r\ndistributed power system scenario, the new mechanism could effectively reduce the total number of labels and overheads, save\r\nbandwidth, and shorten the multicast tree establishing time. The good scalability can adapt much better to ubiquitous and thick\r\nelectrical advanced metering application.
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