Methods and devices for asynchronous operation of a CDMA...

Details Methods and devices for asynchronous operation of a CDMA... Methods and devices for asynchronous operation of a CDMA...

2005-03-29

2005-03-29

Qureshi, Afsar (Department: 2667)

Multiplex communications

Communication over free space

Combining or distributing information via code word channels...

C370S335000, C714S022000, C455S450000

Reexamination Certificate

active

06873612

ABSTRACT:
A CDMA mobile communication system is operated asynchronously while using common forward channel PN and Walsh codes. Such operation is enabled by devices in the system that provide measurements of the instantaneous offsets between PN codes of neighboring base stations. Knowledge of instantaneous offsets may be maintained and used to identify base station signals to enable handovers to neighboring base stations. Instantaneous offsets may also be processed over time to identify states of imminent collision so that corrective action can be taken to avoid or minimize collision effects.

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patent: 6078572 (2000-06-01), Tanno et al.
T.S. Rappaport, “CDMA Digital Cellular Standard (IS-95)”, Wireless Communications Principles and Practice, IEEE Press 1996, Chapter 10, pp. 519-533.
J.D. Gibson, “CDMA Technology and the IS-95 North American Standard”, The Mobile Communications Handbook, IEEE Press 1996, Chapter 27, pp. 430-448.

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