A Fast Handover Mobility Scheme over 802.16j Moving RS Mode

• Main Authors: Yeh, Ying-Chieh, 葉盈潔
• Other Authors: Chen, Yaw-Chung
• Format: Others
• Language: en_US
• Online Access: http://ndltd.ncl.edu.tw/handle/89549791045251459064

碩士 === 國立交通大學 === 網路工程研究所 === 97 === The IEEE 802.16j amendment defines specifications for multihop relay features to gain coverage extension and throughput enhancement of IEEE 802.16 networks. The usage scenarios for relay station (RS) are Fixed Relay Station (FRS), Nomadic Relay Station (NRS), and Mobile Relay Station (MRS). Among these scenarios, MRS can be mounted on mobile vehicles to simplify handover problem. However, network layer handover solutions are undefined in the amendment. Conventional handover scheme, Mobile IP, causes interruption latency which is considered too long to support real-time applications. In this thesis, we propose a novel mobility scheme for MRS in moving RS mode and corresponding MAC management messages. Therefore, link layer and network layer handover procedures can be performed concurrently to reduce the service disruption time. We develop an analytical model and simulation to evaluate our scheme. The numerical result shows that our scheme is able to reduce the interruption latency and packet loss rate significantly.