发明名称 |
Digital cellular switching system with means for securing uninterrupted data transparency during handoffs. |
摘要 |
<p>In a cellular communications system, the quality of a signal over a first two-way connection from a destination to a mobile terminal is compared with a threshold. When the signal quality becomes lower than the threshold, a second two-way connection is established and a switching request signal and an information-bearing signal are sent from the mobile terminal through both connections to a switching exchange. In response to the request signal, one directional path of the first connection is cleared by the exchange to prevent a version of the signal passing through the first connection from reaching the destination and a first switching complete signal is sent through the other path of the first connection to the mobile terminal to allow it to clear the first connection and return a second switching complete signal. The other path of the first connection is then cleared by the exchange in response to the second switching complete signal. <IMAGE></p> |
申请公布号 |
EP0509548(A2) |
申请公布日期 |
1992.10.21 |
申请号 |
EP19920106785 |
申请日期 |
1992.04.21 |
申请人 |
NEC CORPORATION |
发明人 |
KOJIMA, SUSUMU;NAGASHIMA, NORIAKI;HASHIMOTO, TADAO |
分类号 |
H04J3/00;H04L5/22;H04W36/08;H04W36/18 |
主分类号 |
H04J3/00 |
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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