Telecommunications system and method for communicating internet packets between an external packet data communications network and a packet radio network
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United States of America Patent
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Dec 28, 2010
Issued Date -
N/A
app pub date -
May 17, 2004
filing date -
Jun 16, 2003
priority date (Note) -
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Abstract
A telecommunications system for communicating internet packets between a correspondent node and a mobile node. The system comprises a packet radio network providing packet data bearers for communicating internet packets with nodes. Each of the bearers is defined with respect to a source address of the internet packets, the packet radio network including a gateway support node (GGSN) to provide an interface between the external network and the packet radio network. The GGSN detects whether an internet packet is for providing a binding update to the correspondent node of a first source address of the mobile node to a care-of-address of the mobile node. If the internet packet is a binding update, the GGSN allows egress of internet packets sent from the correspondent node. By allowing egress of packets from the correspondent node having this care-of-address as the destination address, a measure of security is provided.
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