Method and apparatus for controlling signal quality in a CDMA cellular telecommunications

Patent 5623484 Issued on April 22, 1997. Estimated Expiration Date:

December 15, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system
Patent #: 5265119
Issued on: 11/23/1993
Inventor: Gilhousen, et al.

Mobile station assisted soft handoff in a CDMA cellular communications system
Patent #: 5267261
Issued on: 11/30/1993
Inventor: Blakeney, II, et al.

Prioritization between handoff and new call requests in a cellular communications system Patent #: 5301356
Issued on: 04/05/1994
Inventor: Bodin, et al.

Inventor

Muszynski, Peter

Assignee

Nokia Telecommunications Oy

Application

No. 307689 filed on 12/15/1994

US Classes:

370/335, Combining or distributing information via code word channels using multiple access techniques (e.g., CDMA)455/423Diagnostic testing, malfunction indication, or electrical condition measurement

Examiners

Primary: Olms, Douglas W.
Assistant: Ton, Dang

Attorney, Agent or Firm

Cushman Darby & Cushman IP Group of Pillsbury Madison & Sutro lLP

Foreign Patent References

115139 EP. 08/25/1984
548939 EP. 06/25/1993
579372 EP. 01/25/1994

International Class

H04J 013/04

Abstract

A system and a method for controlling the radio signal quality between a plurality of mobile stations and a plurality of base stations connected to a mobile switching center of a code division multiple access (CDMA) cellular telecommunication system. Each base station is adapted to measure the quality of each active CDMA communication link and to report for each active CDMA radio communication to the mobile switching center the corresponding measured communication signal quality. The mobile switching center is adapted to perform an averaging process on the reported quality measure values, in order to calculate a recommended quality measure threshold value. The base stations are adapted to receive the recommended threshold value for use in an uplink closed-loop power control algorithm for the mobile stations.

Other References

Allen Salmasi and Klein S. Gilhousen "On the System Design Aspects of Code Division Multiple Access (CDMA) Applied to Digital Cellular and Personal Communications Networks", reprinted from Proceedings of the 41st IEEE Vehicular Technology Conference, St. Louis, Mo., May 19-22, 199