원문정보
초록
영어
Multimedia provisioning over Wi-Fi networks is a complex task that should consider also
novel issues stemming from the specific behavior of IEEE 802.11 protocols. In particular, we
claim the need for visibility of context data about the IEEE 802.11 performance anomaly, i.e.,
the situation where even a single node located at the borders of the coverage area of a Wi-Fi
access point produces a relevant degradation in the connectivity quality of all other nodes in
the area. The paper proposes a novel application-level middleware that counteracts IEEE
802.11 anomaly without imposing any modification in standard Wi-Fi protocols, thus
permitting to maintain the current wide base of installed equipment. Our middleware
portably detects anomaly situations via decentralized standard mechanisms available at
clients; anomaly awareness is used to promptly react with application-level management
operations (flow quality downscaling and traffic shaping) that both preserve the goodput at
nodes in well-covered areas and minimize quality degradations at clients generating the
anomaly. The reported experimental results point out the feasibility of application-level
middleware approaches also in the challenging multimedia area.
목차
1. Introduction
2. IEEE 802.11 Anomaly: Background and Related Work
3. Context-Aware Anomaly Management: A Middleware Approach
4. MUM Anomaly Facility: Architecture and Implementation Insights
4.1. The MUM Middleware
4.2. The Anomaly Facility Architecture
4.3. Implementation Insights
5. Experimental Results
6. Conclusions and Future Work
7. Acknowledgements
8. References