Patent ID: 8547979
Filing Date: 2013-10-01
Classification: H04L,H04W

Abstract:
1. A method for improving IP fragmentation and transmission of user payload between a User Equipment (UE) and a Peer Node (PN), the payload being transmitted through a transmission path enabled by at least a first established tunnel and a second established tunnel, said tunnels connecting a first node and a second node in a Packet Core Network (PCN), the method comprising: the first node fragmenting at least one received payload packet into fragments, wherein each fragment contains a valid IP header and IP data on the basis of a minimum Maximum Transmission Unit (MTU) for an upper IP layer of the transmission path, the first node encapsulating said fragments at the entry of the first tunnel, the first node determining the MTU for the upper IP layer of the transmission path on the basis of an MTU of a lower IP layer of the transmission path and on the basis of the size of at least one additional tunnel header for the encapsulated fragments.