Patent ID: 6834050
Filing Date: 2004-12-21
Classification: H04M,H04W

Abstract:
A method of consistently selecting a particular Packet Data Service Node (PDSN) from a plurality of PDSNs in a packet data network to host a data session for a Mobile node (MN), said method comprising the steps of:storing a static lookup table in a Packet Core Function (PCF), said table including a list of identifiers for MNs and an associated list of the plurality of PDSNs in the network; utilizing the lookup table by the PCF to associate an identifier for the MN with the particular PDSN; selecting the particular PDSN by the PCF to host the data session for the MN; storing in a cache memory of the PCF, an identifier for the MN and an Internet Protocol (IP) address for the particular PDSN for a predetermined period of time after handing off the MN to another PCF; determining whether the MN returned to the PCF within the predetermined Period of time; and reselecting the particular PDSN to host the data session if the MN returned to the PCF within the predetermined period of time.