Forward link power control of multiple data streams transmitted to a mobile station using a common power control channel

• US 20040132477A1
• Filed: 12/16/2003
• Published: 07/08/2004
• Est. Priority Date: 04/02/2001
• Status: Active Grant

• Current Assignee: Leo Razoumov, Stein A. Lundby
• Original Assignee: Leo Razoumov, Stein A. Lundby
• Inventors: Lundby, Stein A., Razoumov, Leonid
• Granted Patent: US 6,975,880 B2
• Time in Patent Office: Days
• US Class Current: 455/522
• CPC Class Codes: H04W 52/143 Downlink power control
• CPC Class Codes: H04W 52/40 during macro-diversity or soft handoff

Abstract

A method and apparatus for controlling transmit power levels of a plurality of different data streams transmitted from at least one base station to a mobile station in a mobile radio communication system is described. A stream of power control commands is formed at the mobile station in accordance with either the first or second received data stream. A power control signal is formed at the mobile station from the first stream of power control commands and transmitted to the base station.

Claims

1. In a mobile radio telephone communication system, a method comprising:

forming a first stream of power control commands based on a first data communication from each base station in a first active set of base stations and from each base station in a second active set of base stations;

transmitting, at a power level based on said first stream of power control commands, a first data stream from the first and second active sets of base stations to a mobile station;

forming a second stream of power control commands based on the first data communication from each uncommon base station in the first and second sets of active base stations;

transmitting to the mobile station, at a power level based on said second stream of power control commands, the first data stream from each uncommon base station in the first and second sets of active base stations.

2. The method as recited in claim 1 further comprising:

transmitting to the mobile station, at a power level based on said second stream of power control commands, a second data stream from at least one of the uncommon base stations.

3. The method as recited in claim 1 further comprising:

transmitting to the mobile station, at a power level based on said first stream of power control commands, a second data stream from at least one of the first and second active sets of base stations.