Communication system capable of adjusting transmit power of a subscriber unit

• US 5,204,970 A
• Filed: 01/31/1991
• Issued: 04/20/1993
• Est. Priority Date: 01/31/1991
• Status: Expired due to Term

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Stengel, Robert E., Davenport, Roger A.
• Primary Examiner(s): Eisenzopf, Reinhard J.
• Assistant Examiner(s): URBAN, EDWARD F
• Application Number:
  US07/648,809
• Time in Patent Office: 810 Days
• Field of Search: 455/10, 455/52, 455/63, 455/67, 455/127, 455/343, 455/69, 455/52.1, 455/52.2, 455/52.3, 455/67.1, 455/67.3, 455/226.2, 455/226.3
• US Class Current: 455/69
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/245 taking into account received signal strength
• CPC Class Codes: H04W 52/248 where transmission power control commands are generated based on a path parameter

Abstract

A method for adjusting the transmitter power of a subscriber unit includes the steps of determining noise characteristic of a receiver site, measuring strength of a signal received from the subscriber, determining a power adjust value based on the noise characteristic and the received signal strength. The transmit power of the subscriber unit is adjusted according to the power adjust value.

Claims

1. A method for adjusting the transmitter power of a subscriber unit, comprising the steps of:

(a) receiving a received signal at a receiver site, said received signal being transmitted by the subscriber unit;

(b) determining noise floor of the receiver site;

(c) determining the strength of the received signal;

(d) determining a power adjust value based on the difference between the noise floor of the receiver site and the strength of the received signal;

(e) transmitting the power adjust value to the subscriber unit; and

(f) adjusting the transmitter power of the subscriber unit according to the power adjust value

2. The method of claim 1, wherein said step (b) and (d) includes the steps of:

(b) (1) determining total noise power by adding noise power at the receiver site to noise power of the received signal

(b) (2) determining the power adjust value based on the total noise power and the strength of the received signal.

3. A communication system capable of adjusting transmitter power of a subscriber unit comprising:

at least one subscriber unit;

means for receiving a received signal at a receiver site;

said received signal being transmitted by the subscriber unit;

means for determining the strength of the received signal;

means for determining noise floor of the receiver site;

means for determining a power adjust value based on the difference between the noise floor of the receiver site and the strength of the received signal; and

means for transmitting the power adjust value to the subscriber unit.