Patent ID: 7209491

Claim:
A method of transmitting data in a packet based communication network system through a tunnel, said packet based communication network system comprising at least a first communication network having a network element, a receiving node and a sending node, wherein said receiving node and said sending node communicate with each other via said at least first communication network, said method comprising the steps of: generating an original packet to be sent to said receiving node, said original packet comprising a first header indicating a source address and a destination address for the transmission of said original packet and a payload; generating a tunneled packet by encapsulating said original packet with a second header so that said first header is an inner header and said second header is an outer header of said tunneled packet; said outer header indicating an intermediate source address and an intermediate destination address of an intermediate network station for the transmission of said tunneled packet; processing said tunneled packet for the transmission by compressing said inner header in order to form a compressed inner header; compressing said outer header in order to form a compressed outer header; and generating a compressed packet comprising said compressed inner header, said compressed outer header, and said payloads, wherein said receiving node is identifiable as destination by a permanent network address and a temporary network address.