发明名称 |
RADIO LINK QUALITY HANDOFF TRIGGER |
摘要 |
A method and system is disclosed for triggering handoff of a call from a CDMA network to an AMPS network on which it is overlaid responsive to a determination that the CDMA RF link has degraded to such an extent that the call quality will be degraded significantly or the call is likely to be dropped is disclosed. A handoff of a call from a CDMA network to an AMPS network if, at a given time: (1) the number of forward link erasures is greater than a first maximum number of forward link erasures; or (2) the number of reverse link erasures is greater than a first maximum number of forward link erasures; or (3) the number of forward link erasures is greater than a second maximum number of forward link erasures and the forward traffic channel gain is greater than a maximum forward traffic channel gain; or (4) the number of reverse link erasures is greater than a second maximum number of reverse link erasures and the ratio of energy per bit to noise power spectral density on the reverse link ("EB/NO") is greater than a maximum EB/NO. In alternative embodiments, the present invention may be used to trigger handoff of a call from a first CDMA cell site to a second CDMA cell site or to an AMPS cell site serving a cell on which the cell served by the first CDMA cell site is not overlaid.
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申请公布号 |
CA2291082(A1) |
申请公布日期 |
1998.06.25 |
申请号 |
CA19972291082 |
申请日期 |
1997.12.17 |
申请人 |
NORTEL NETWORKS CORPORATION |
发明人 |
BOETTGER, DAVID A.;CURTIS, DAVID E.;JALALI, AHMAD;BOOK, WILLIAM B. |
分类号 |
H04W36/14;(IPC1-7):H04Q7/38 |
主分类号 |
H04W36/14 |
代理机构 |
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主权项 |
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地址 |
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