发明名称 |
MOBILE COMMUNICATION SYSTEM |
摘要 |
Provided is a mobile communication system that can switch between a first communication state and a second communication state. In the first communication state, VoIP media signals are exchanged between a mobile station (UE #1) and a mobile station (UE #2) via an LTE wireless access system and a node (S-GW), and VoIP control signals are exchanged via the LTE wireless access system, the node (S-GW), and an IMS. In the second communication state, circuit-switched signals are exchanged between the mobile station (UE #1) and an expanded MSC/MGW via a 2G/3G wireless access system; VoIP media signals are exchanged between the expanded MSC/MGW and the mobile station (UE #2) via the node (S-GW); and VoIP control signals are exchanged between the expanded MSC/MGW and the mobile station (UE #2) via the node (S-GW) and the IMS.
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申请公布号 |
CA2770742(A1) |
申请公布日期 |
2011.02.17 |
申请号 |
CA20102770742 |
申请日期 |
2010.08.11 |
申请人 |
NTT DOCOMO, INC.;NEC CORPORATION |
发明人 |
NISHIDA, KATSUTOSHI;KOSHIMIZU, TAKASHI;TAMURA, TOSHIYUKI |
分类号 |
H04W48/18;H04M3/00;H04W36/14;H04W88/06;H04W92/24 |
主分类号 |
H04W48/18 |
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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