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

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publication2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, WiOpt 2014
PublisherIEEE Computer Society
Pages50-56
Number of pages7
ISBN (Print)9783901882630
DOIs
StatePublished - 1 Jan 2014
Event2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, WiOpt 2014 - Hammamet, Tunisia
Duration: 12 May 201416 May 2014

Publication series

Name2014 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
CountryTunisia
CityHammamet
Period12/05/1416/05/14

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    Hsieh, P. J., Lin, P-H., Lee, Y. C., Chiu, R. D., Wei, H. Y., & Wei, W. H. (2014). CoPS: Context Prefetching handover scheme on 4G outdoor small cell testbed. In 2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, WiOpt 2014 (pp. 50-56). [6850278] (2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, WiOpt 2014). IEEE Computer Society. https://doi.org/10.1109/WIOPT.2014.6850278