Method and apparatus for providing mobile unit assisted hard handoff from a CDMA communication system to an alternative access communication system
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United States of America Patent
Stats
-
Jan 14, 1997
Grant Date -
N/A
app pub date -
Mar 30, 1995
filing date -
Mar 30, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and system for providing a reliable means to perform handoff from a code division multiple access (CDMA) system using a pilot signal to an alternative access communication technique system. Simple pilot box circuitry is added to a set of border base stations. The border base stations are base stations which operate only in the alternative access communication technique and which have coverage areas which are contiguous with coverage areas of CDMA operation base stations. The mobile unit monitors for the pilot signal from the border base stations in the same manner as it monitors for pilot signals from the CDMA operation base stations. When the mobile unit detects the pilot signal corresponding to a border base station, it notifies a system controller in accordance with standard operation. The system controller is aware that the pilot signal corresponds to a border base station and thus triggers a hard handoff process to the alternative access communication technique system in response thereto.
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