Method and apparatus for hard handoff in a CDMA system

The cellular communication system includes a number of base stations through which a mobile unit communicates. The mobile unit maintains a list of active base stations with which it can communicate. One of the active stations is in communication with the mobile and uses this communication to measure...

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Bibliographische Detailangaben
1. Verfasser:	GILHOUSEN KLEIN S.,MUNSINGER DAVID B.,KARMI GADI,ZIV NOAM A.,PADOVANI ROBERTO,WEAVER LINDSAY A. JNR
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TRANSMISSION WIRELESS COMMUNICATIONS NETWORKS
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Beschreibung
Zusammenfassung:	The cellular communication system includes a number of base stations through which a mobile unit communicates. The mobile unit maintains a list of active base stations with which it can communicate. One of the active stations is in communication with the mobile and uses this communication to measure the round-trip-delay between mobile and station. This delay is compared with a threshold and if this is exceeded, and the base station is a boundary station, then a hard hand-off is executed. The mobile can also monitor candidate base stations and if a triggering pilot signal is detected a hand-off can be triggered. Preferably the handoff can be between base stations controlled by different mobile switching centres.