发明名称 |
Automatic and seamless vertical roaming between wireless local area network (WLAN) and wireless wide area network (WWAN) while maintaining an active voice or streaming data connection: systems, methods and program products |
摘要 |
A Mobile Station (MS) is able to vertically roam in either direction between two different networks, i.e., WWAN and WLAN. The MS is equipped with a dual mode Radio for WWAN and WLAN transmissions. The WLAN Radio is linked to a WLAN Enterprise Gateway Controller (EGC) via a first air link and the WWAN Radio is linked to a WWAN Base Transceiver Station (BTS) via a second air link. An outgoing VoIP call from the WLAN Radio to a remote party on the WWAN will transition or seamlessly switch over to a WWAN connection when the MS detects packet error rates, frequent scale back or consistent signal degradation.
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申请公布号 |
US7561547(B2) |
申请公布日期 |
2009.07.14 |
申请号 |
US20060356474 |
申请日期 |
2006.02.17 |
申请人 |
SYMBOL TECHNOLOGIES, INC. |
发明人 |
BRIDEGLALL RAJ |
分类号 |
H04W4/00;H04L12/28;H04L12/56;H04W36/14 |
主分类号 |
H04W4/00 |
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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