United States Patent 9,456,428
Proctor, Jr. , et al. September 27, 2016
Method and apparatus for allowing soft handoff of a CDMA reverse link utilizing an orthogonal channel structure
Abstract
Method and apparatus for base stations and subscriber units allows soft handoff of a CDMA reverse link utilizing an orthogonal channel structure. Subscriber units transmit an orthogonally coded signal over a reverse link to the base stations. A given base station provides timing control of the timing offset of the reverse link signal. Based on at least one criterion, an alignment controller determines that the given base station should hand off timing control to another base station, and a soft handoff process ensues. In response to a command or message for soft handoff of the subscriber unit from the given base station to another base station, the subscriber unit makes a coarse timing adjustment to the timing of the coded signal. The subscriber unit may make fine timing adjustments based on feedback from the base station controlling timing. Multiple base stations may provide power control feedback to the subscriber unit.
Inventors:
Proctor, Jr.; James A. (Melbourne Beach, FL), Alapuranen; Pertti O. (Indialantic, FL)
Applicant:
Name
City
State
Country
Type
IPR Licensing, Inc.
Wilmington
DE
US
Assignee:
IPR Licensing, Inc. (Wilmington, DE)
Family ID:
1000002134271
Appl. No.:
14/189,520
Filed:
February 25, 2014
Prior Publication Data
Document Identifier
Publication Date
US 20140177594 A1 Jun 26, 2014
Related U.S. Patent Documents
Application Number
Filing Date
Patent Number
Issue Date
13069174 Mar 22, 2011 8676131
10717995 Mar 22, 2011 7911993
09898514 Feb 28, 2006 7006428
60427847 Nov 20, 2002
60219789 Jul 19, 2000
Current U.S. Class: 1/1
Current CPC Class: H04W 52/40 (20130101); H04B 7/2628 (20130101); H04J 13/0022 (20130101); H04J 13/0048 (20130101); H04J 13/12 (20130101); H04J 13/18 (20130101); H04W 36/0072 (20130101); H04W 36/18 (20130101); H04B 2201/70703 (20130101)
Current International Class: H04W 52/40 (20090101); H04W 36/18 (20090101); H04W 36/00 (20090101); H04J 13/18 (20110101); H04J 13/00 (20110101); H04B 7/26 (20060101); H04J 13/12 (20110101)
Field of Search: ;455/522,68-69,515,572-574,524,525,561,562.1
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