Location based power control for mobile communications systems

• US 6,845,246 B1
• Filed: 06/15/2000
• Issued: 01/18/2005
• Est. Priority Date: 06/15/2000
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Nortel Networks Limited (Nortel Networks Corporation)
• Inventors: Steer, David G.
• Primary Examiner(s): Nguyen, Simon
• Application Number:
  US09/593,698
• Time in Patent Office: 1,678 Days
• Field of Search: 455/522, 455/456.1, 455/457, 455/63, 455/68, 455/70, 455/422, 455/69, 370/317, 370/318
• US Class Current: 455/522
• CPC Class Codes: H04W 52/24 using SIR [Signal to Interference Ratio] or other wireless path parameters
• CPC Class Codes: H04W 52/26 using transmission rate or quality of service QoS [Quality of Service]
• CPC Class Codes: H04W 52/283 Power depending on the position of the mobile

Abstract

A method and apparatus for facilitating power control within mobile radio systems. The power control is a function of location of the mobile station. Power levels are mapped to a geographic grid and power levels are set based upon such pre-determined power levels. Alternatively, initial power levels are set based upon the mapped power levels, but are subject to fine tuning through a much reduced feedback loop.

Claims

1. A method for location-based power control within a packet-based mobile radio communications system, said method comprising:

receiving broadcast power control information on a mobile side of said packet-based mobile radio communications system, said broadcast power control information including a predetermined transmit power level;

transmitting, at said predetermined transmit power level, a first one-way packet transmission from said mobile side to a network side of said packet-based mobile radio communications system, said first one-way packet transmission including a location data object being a geographical location that corresponds to a portion of a packet-based mobile radio communications coverage area;

receiving said location data object on said network side;

matching said location data object to a corresponding power value data object within a power control map of power value data objects; and

in advance of a second one-way packet transmission, re-setting said predetermined transmit power level to said corresponding power value data object.

2. The method as claimed in claim 1 wherein said re-setting further includes,

setting said corresponding power value according to a suitable bit rate and QoS, and

setting said corresponding power value to compensate for fading.

3. The method as claimed in claim 2, said method further including updating said power control map to include said corresponding power value related to said suitable bit rate and QoS and compensating for fading.