A study of mobility in WLAN
نویسنده
چکیده
This paper studies mobility in wireless LAN (WLAN, IEEE802.11). Mobility is an instinct nature of WLAN as being wireless. But this mobility is limited by radio propagation and the IEEE802.11 specifications. For seamless mobility in a larger area, e.g., between two extended service sets (ESSs), some sorts of mobility management mechanisms are needed. Mobile IP has been widely considered as a solution for realizing mobility in IP networks. However, in WLAN, the speed of handover is a big challenge, because it is critical for real-time applications such as voice over IP. To counteract these challenges, many approaches for enhancing the performance of Mobile IP have been proposed. This paper will mainly study two mechanisms, namely Hierarchical Mobile IP and link-layer information (or Hint). By combining these enhancement based on Mobile IP, seamless mobility in WLAN should be achieved. [KEYWORD: WLAN, seamless mobility, speed of handover, Mobile IP, hierarchical Mobile IP, link-layer information]
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تاریخ انتشار 2004