InterDigital Inc (IDCC)

[Gamco]

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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