In this paper we present three context transfer mechanisms to support seamless (inter-system) handover: L2 Tunnel, SDU Reconstruction and SDU Context Transfer. The hand-over schemes are evaluated for services based on TCP SACK. The influence of different system parameters like the link layer round trip time and block error rate are investi-gated. It is shown that there can be large differences in handover performance caused by packet loss or packet du-plication, which interact with TCP congestion control. L2 Tunnel always performs best but has the highest complexity. It is followed by SDU Reconstruction and then SDU Context Transfer respectively. All schemes are always better in performance than when no context transfer is used.
['Joachim Sachs', 'Birinder Singh Khurana', 'Petri Mahonen']
Evaluation of Handover Performance for TCP Traffic Based on Generic Link Layer Context Transfer