Patent ID: 8050232
Filing Date: 2011-11-01
Classification: H04W

Abstract:
1. A method for assisting a handover of a user terminal's (UT's) communication session from a first radio access point (AP 1 ) to a second radio access point (AP 2 ) in a radio access network, said method to be carried out by said UT comprising the following steps: a) establishing that said communication session is to be handed over from said AP b) fetching a first packet from a first buffer memory of said UT, c) extracting a frame sequence number (FSN) from said first packet and storing said FSN in a first memory space of a second buffer memory of said UT, d) forwarding said first packet to an application running on said UT or to a higher level protocol of said UT, e) fetching a next packet from said first buffer memory, said next packet being the next packet received by said UT after said first packet, f) extracting a frame sequence number from said next packet (FSNNEXT), g) establishing whether said next packet is a consecutive packet of said first packet by comparing said FSNNEXT with said FSN, and, h) storing said FSNNEXT in said first memory space of said second buffer memory and forwarding said “next packet” to a higher level protocol or a final application if it was established in step g) that said “next packet” is a consecutive packet of said first packet, and otherwise buffering said “next packet” in a second memory space of said second buffer memory.