发明名称 |
METHOD AND APPARATUS FOR TIME DIVISION DUPLEX PILOT SIGNAL GENERATION. |
摘要 |
A method and apparatus for providing a reliable means to perform handoff from a code division multiple access (CDMA) system using a pilot signal to an alternative access technique system. Simple pilot box circuitry (350) is added to a set of border base stations (C2A-C2R). The border base stations are base stations (C2A-C2R) which operate only in the alternative access technique and which have coverage areas which are contiguous with coverage areas of CDMA operation base stations (C1H-C1S). The mobile unit (10) monitors for the pilot signal from the border base stations (C2A-C2R) in the same manner as it monitors for pilot signals from the CDMA operation base stations (C1A-C1S). When the mobile unit (10) detects the pilot signal corresponding to a border base station (C2A-C2R), it notifies a system controller (202) in accordance with standard operation. The system controller (202) is aware that the pilot signal corresponds to a border base station and thus triggers a hard handoff process to the alternative access technique system in response thereto. The border base stations (C2A-C2R) use a time division duplex technique to monitor a pilot and synchronization sequence from a neighboring one of the CDMA operation base stations to obtain an estimate of absolute system time.
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申请公布号 |
MX9801174(A) |
申请公布日期 |
1998.07.31 |
申请号 |
MX19980001174 |
申请日期 |
1998.02.11 |
申请人 |
QUALCOMM INCORPORATED |
发明人 |
LINDSAY A. WEAVER JR.;GWAIN BAYLEY;EDWARD G. TIEDEMANN JR.;KLEIN S. GILHOUSEN |
分类号 |
H04W36/14;(IPC1-7):H04Q07/38 |
主分类号 |
H04W36/14 |
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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