標題: | Reducing idle mode power consumption of cellular/VoWLAN dual mode mobiles |
作者: | Tsao, SL Cheng, EC 資訊工程學系 Department of Computer Science |
關鍵字: | cellular-WLAN interworking;dual mode mobile;voice over WLAN;power saving |
公開日期: | 2005 |
摘要: | The integration of cellular and voice over WLAN (VoWLAN) systems recently has attracted considerable interest from both academia and industry. A cellular/VoWLAN dual mode system helps mobile users to access a low cost voice over IP (VoIP) service in a WLAN area and switch to a wide-coverage cellular system without WLANs. However, the system suffers the power consumption problem and the service continuity issue between cellular and WLAN systems. This study presents a network architecture for an enterprise or a dual mode service provider to permit service continuity between cellular and VoWLAN systems. This architecture is used as a basis for further elaborating a novel power saving mechanism, called PIANO (paging via another radio). By applying the proposed mechanisms to a dual mode mobile, the mobile can completely switch off its WLAN interface, only leaving the cellular interface awake to listen to paging signals. When a dual mode mobile receives a paging message from its cellular interface, it wakes up its WLAN interface and responds to the call via WLAN networks. Therefore, a dual mode mobile can reduce the idle mode power consumption, and can also obtain VoWLAN services. The simulation results illustrate that the proposed methods significantly extend the standby hours of a dual mode mobile. |
URI: | http://hdl.handle.net/11536/17554 |
ISBN: | 0-7803-9414-3 |
期刊: | GLOBECOM '05: IEEE Global Telecommunications Conference, Vols 1-6: DISCOVERY PAST AND FUTURE |
起始頁: | 2902 |
結束頁: | 2906 |
顯示於類別: | 會議論文 |