发明名称 |
CONFERENCING PSTN GATEWAY METHODS AND APPARATUS TO FACILITATE HETEROGENEOUS WIRELESS NETWORK HANDOVERS FOR MOBILE COMMUNICATION DEVICES |
摘要 |
<p>A mobile communication device operating in a wireless local area network (WLAN) of a communication network maintains an inter-enterprise voice call via its WLAN interface (e.g. 802.11/VoIP/SIP) with another communication device in the communication network. During the voice call, a handover of the voice call from the WLAN to a wireless wide area network (WWAN) (e.g. GSM/GPRS) is identified. In response to identifying a handover indication, the mobile device causes a request message (e.g. a SIP INVITE message) to be sent over the WWAN to the conferencing gateway for establishing a first connection leg through the WWAN via its WWAN interface with a conference room of the conferencing gateway. The mobile device also causes a re-routing message (e.g. a SIP REFER message) to be sent to the communication device, so that a second connection leg between the communication device and the conference room may be established.</p> |
申请公布号 |
EP1927255(A4) |
申请公布日期 |
2012.06.20 |
申请号 |
EP20060790726 |
申请日期 |
2006.09.22 |
申请人 |
RESEARCH IN MOTION LIMITED;MCMASTER UNIVERSITY |
发明人 |
KEZYS, VYTAUTAS, ROBERTAS;TODD, TERENCE, D.;SMADI, MOHAMMED;ZHAO, DONGMEI |
分类号 |
H04L12/64;H04M7/12;H04W36/14;H04W76/04;H04W84/12;H04W88/06;H04W92/02 |
主分类号 |
H04L12/64 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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