Patent ID: 7873699

Claim:
A network control system, comprising: a network defined by a predetermined control protocol; at least one home appliance connected to the network; and a network manager connected to the network and configured to determine home codes for classifying respective homes, wherein the network manager controls the home appliance and monitors the state of the home appliance, wherein the predetermined control protocol is composed of an application layer, a data link layer, and a physical layer, wherein the network manager and the home appliance communicate with one another in the unit of a single packet according to the predetermined control protocol, wherein when data communicated over the network is larger than the single packet, the application layer of the control protocol divides the data into single packet increments, each single packet increment is transferred to the data link layer, and a header region is added to the single packet in the data link layer; wherein the packet comprises: the header region composed of a packet header field comprising a home code (HC) field for classifying a home where the network is constructed, and a field for adding packet function later, a body region composed of a message header field, a field for adding a message function later, and a message field, and a trailer region, and wherein the packet header field comprises: a receiver address (RA) field for indicating a receiver, a sender address (SA) field for indicating a sender, a packet length (PL) field for indicating the length of the packet, an access priority (AP) field for indicating a priority of transmission, a packet header length (PHL) field for indicating the length of the packet header, a protocol version (PV) field for indicating the version of the control protocol, a packet type (PT) field for indicating the type of the packet, a retransmission counter (RC) field for indicating the number of retransmissions, and a packet number (PN) field for indicating the transmission of a new packet.