Patent ID: 8861489

Claim:
A method of computing an interval of message transmission in an access point located in a specific subnet, the method comprising: (a) at the access point, receiving a first message containing information regarding the specific subnet from at least one router; (b) at the access point, determining whether the access point is an edge access point located at a boundary between the specific subnet and a neighbor subnet; and (c) at the access point, computing, by a processor, the interval of transmission of the first message to at least one mobile node based on the determination result and an edge count value, wherein the computing comprises computing a first interval of transmission of the first message when the access point is determined as the edge access point by the determining, and computing a second interval of transmission of the first message, greater than the first interval, when the access point is not determined as the edge access point by the determining, and wherein the edge count value is a value that is increased each time when the access point determines that the access point is an edge access point, and is decreased each time when the access point determines that the access point is not the edge access point.