Title :
Effective VoIP call routing in WLAN and cellular integration
Author :
Lin, Yi-Bing ; Chen, Whai-En ; Gan, Chai-Hien
Author_Institution :
Dept. of Comput. Sci. & Inf. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
In cellular-WLAN integration, a dual-mode mobile station (MS) typically disables the WLAN module for power saving. A major problem is that for an incoming VoIP call (or data session), the MS will not be able to receive this call from the WLAN. It turns out that the call is directed to the cellular network. This letter proposes a simple push solution where an MS can accurately detect a VoIP call from paging signaling of the cellular network. Then the WLAN module of the MS is turned on and the VoIP call is connected to the MS through the relatively inexpensive WLAN.
Keywords :
3G mobile communication; Internet telephony; cellular radio; paging communication; routing protocols; telecommunication congestion control; telecommunication signalling; transport protocols; wireless LAN; MS; SIP; UMTS; WLAN; call control; cellular integration; dual-mode mobile station; effective VOIP call routing; paging signaling; power saving; session initiation protocol; universal mobile telecommunications system; wireless local area network; 3G mobile communication; Gallium nitride; IP networks; Internet telephony; Land mobile radio cellular systems; Network servers; Routing; Telecommunication control; Web server; Wireless LAN;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2005.10027
