METHOD AND APPARATUS FOR FORWARD LINK POWER CONTROL

• US 20100323747A1
• Filed: 08/26/2010
• Published: 12/23/2010
• Est. Priority Date: 04/25/1997
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Tiedemann, Edward G. JR., Saints, Keith W.
• Application Number:
  US12/869,389
• Publication Number:
  US 20100323747A1
• Time in Patent Office: Days
• US Class Current: 455/522
• CPC Class Codes: C08L 2205/02 containing two or more polymers of the same C08L -group
• CPC Class Codes: C08L 23/04 Homopolymers or copolymers of ethene
• CPC Class Codes: C08L 23/06 Polyethene
• CPC Class Codes: C08L 23/08 Copolymers of ethene C08L23/16 takes precedence
• CPC Class Codes: C08L 23/0815 Copolymers of ethene with aliphatic 1-olefins
• CPC Class Codes: C08L 23/0853 Vinylacetate
• CPC Class Codes: C08L 23/12 Polypropene
• CPC Class Codes: C08L 23/16 Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: H04W 52/08 Closed loop power control
• CPC Class Codes: H04W 52/24 using SIR [Signal to Interference Ratio] or other wireless path parameters
• CPC Class Codes: H04W 52/40 during macro-diversity or soft handoff

Abstract

A forward link power control mechanism measures the reverse link power control bits which are transmitted on the forward traffic channel. At the remote station, the reverse link power control bits from multiples base stations or multiple signal paths are measured, combined, and filtered to yield an improved measurement of the forward link signal quality. The reverse link power control bits which are deemed unreliable are omitted from use in the power control loop. The remote station generates a set of forward link power control bit in accordance with the measurements and transmits these bits to all base stations in communication with the remote station. Each base station adjusts its gain of the forward traffic channel in accordance to its measurement of the forward link power control bit.

Claims

1. A remote station (6) for use in a wireless communication system comprising one or more base stations (4) and one or more remote stations (6), characterized in that the remote station (6) comprises:

a receiver (106) for receiving at least one communication signal including a power control signal transmitted by a base station (4) in a first transmission channel;

a processor (120) for processing the at least one signal received by the receiver (106) to derive an attribute of the at least one signal received by the receiver (1 cm6) from the power control signals; and

a transmitter (136) for transmitting, at a transmission power determined by the received power control signal, transmission power control signals for the base station (4) in a second transmission channel, said signals transmitted in said second transmission channel representing the attribute of the received communication signal.