CoPS: Context Prefetching handover scheme on 4G outdoor small cell testbed

Ping Jung Hsieh, Po-Hung Lin, Yu Chen Lee, Rong Dong Chiu, Hung Yu Wei*, Wen Hsin Wei

*此作品的通信作者

研究成果: Conference contribution同行評審

摘要

Mobility enhancements of small-cell networks in the IEEE/3GPP standard meeting is an important issue, where the mobility robustness is aimed at the prevention and solution of connection failure/exceptions that occur as a result of uncertain channel condition or aggressive mobility. Although exception handling, such as uncontrolled handover and connection re-establishment, is supported in a 4G wireless network system, it still results in a lengthy yet acceptable handover duration. Notably, the results from commercial 4G cellular systems show that the preparation phase period accounting for 19% of the controlled handover duration is long and prone to uncompleted handover. In this work, we propose a Context Prefetching handover Scheme (CoPS) for 4G broadband wireless access networks in order to effectively reduce the lengthy preparation phase period in the controlled handover procedure without any modifications on user side. We also propose two triggering mechanisms according to the mobility scenario for a trade-off between the overhead and the benefit of prefetching. We implement CoPS and the triggering mechanisms on a WiMAX small-cell network platform of outdoor small cell base-stations. Our field trial results show significant improvements of CoPS in a reduction of the preparation phase period by 78% as well as a reduction of handover duration by 17% and in negligible resource occupation overhead. The proposed solutions also can be introduced into existing LTE infrastructures.

原文English
主出版物標題2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, WiOpt 2014
發行者IEEE Computer Society
頁面50-56
頁數7
ISBN(列印)9783901882630
DOIs
出版狀態Published - 1 一月 2014
事件2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, WiOpt 2014 - Hammamet, Tunisia
持續時間: 12 五月 201416 五月 2014

出版系列

名字2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, WiOpt 2014

Conference

Conference2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, WiOpt 2014
國家/地區Tunisia
城市Hammamet
期間12/05/1416/05/14

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