標題: | Active Location Reporting for Emergency Call in UMTS IP Multimedia Subsystem |
作者: | Tsai, Meng-Hsun Lin, Yi-Bing Wang, Hsiao-Han 資訊工程學系 Department of Computer Science |
關鍵字: | Emergency call;IP multimedia core network subsystem (IMS);location tracking;Universal Mobile Telecommunications System (UMTS) |
公開日期: | 1-十二月-2009 |
摘要: | The IP Multimedia Core Network Subsystem (IMS) provides multimedia services for Universal Mobile Telecommunications System (UMTS). In IMS, an emergency call is established by an Emergency-Call Session Control Function (ECSCF). The E-CSCF dispatches the call to the nearest Public Safety Answering Point (PSAP) according to the location of the caller. After emergency call setup, the caller's location is tracked by the PSAP through Location Polling. This paper investigates the performance of location tracking. Then we propose the Active Location Reporting scheme to improve the performance of location tracking. Our study indicates that the Active Location Reporting scheme may significantly outperform the Location Polling scheme. |
URI: | http://dx.doi.org/10.1109/TWC.2009.12.070080 http://hdl.handle.net/11536/149861 |
ISSN: | 1536-1276 |
DOI: | 10.1109/TWC.2009.12.070080 |
期刊: | IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS |
Volume: | 8 |
起始頁: | 5837 |
結束頁: | 5843 |
顯示於類別: | 期刊論文 |