Wireless communications system having reduced noise mode operation capability

• US 7,327,988 B2
• Filed: 04/17/2003
• Issued: 02/05/2008
• Est. Priority Date: 08/20/1996
• Status: Expired due to Fees

• Current Assignee: Intermec IP Corporation (Honeywell International Inc.)
• Original Assignee: Intermec IP Corporation (Honeywell International Inc.)
• Inventors: Erb, Patrick R., Grabon, Robert J., Traeger, Robert J., Alt, Daniel E., Klostermann, Daniel J., Rohde, John K.
• Primary Examiner(s): Nguyen; Duc
• Assistant Examiner(s): LEE, JUSTIN YE
• Application Number:
  US10/418,190
• Publication Number:
  US 20040053578A1
• Time in Patent Office: 1,755 Days
• Field of Search: 455/73, 455/74.1, 455/75, 455/91, 455/95, 455/103, 455/113, 455/123
• US Class Current: 455/73
• CPC Class Codes: H04B 15/02 Reducing interference from electric apparatus by means located at or near the interfering apparatus
• CPC Class Codes: H04B 2215/066 by stopping a clock generator

Abstract

A wireless communication system having a terminal unit operates in a reduced noise state during receipt of a wireless transmission from a control unit. The terminal unit includes terminal circuitry, a radio and noise management circuitry. The noise management circuitry partially or fully disables operation of the terminal circuitry during a receipt by the radio. Noise management circuitry may disable a terminal processor, disable interrupts, buffer interrupts and otherwise modify operation of the terminal circuitry to reduce generated radio noise that would otherwise interfere with receipt of data by the radio. The wireless communication system includes noise management circuitry located in a control unit that operates in conjunction with noise management circuitry in a first terminal unit and a second terminal unit to schedule transmissions from the control unit. These scheduled transmissions allow the terminal units to perform required processing functions outside of the reduced noise period.

Claims

1. A wireless communication system comprising:

terminal circuitry;

a radio operably coupled to the terminal circuitry; and

noise management circuitry coupled to the terminal circuitry and radio that selectively alters operation of the terminal circuitry to reduce generated background noise during a wireless receipt by the radio, wherein the noise management circuitry monitors the strength of incoming radio signals with the terminal circuitry in a reduced noise state and then calculates an attainable signal to noise ratio with the terminal circuitry in a non-reduced noise state, selectively alters or does not alter such operation of the terminal circuitry.

2. The wireless conununication system of claim 1, wherein the noise management circuitry may be interrupted during receipt of transmissions of data by a higher priority terminal unit event to terminate receipt of the transmissions of data.

3. The wireless communication systems of claim 1, wherein the noise management circuitry selectively adjusts terminal circuitry operating frequency.

4. The wireless communication system of claim 1, wherein the noise management circuitry selectively masks interrupts.

5. The wireless communication system of claim 4, wherein the noise management circuitry provides interrupt persistence.

6. The wireless communication system of claim 1, wherein the radio further comprises a received signal strength indicator, and wherein the noise management circuitry selectively disables operation of the tenninal circuitry based upon an output of the received signal strength indicator.