Method and system for a channel selective repeater with capacity enhancement in a spread-spectrum wireless network

• US 20060083196A1
• Filed: 11/28/2005
• Published: 04/20/2006
• Est. Priority Date: 09/17/2001
• Status: Active Grant

• Current Assignee: Leidos, Inc. (Leidos Holdings, Inc.)
• Original Assignee: Science Applications International Corporation
• Inventors: Slocumb, Travis H. III, Kilfoyle, Daniel B., Carson, Steven
• Granted Patent: US 7,710,913 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04B 7/15535 Control of relay amplifier gain amplifier gain control in general H03G3/00; gain control reducing self - or loop interference H04B7/15578
• CPC Class Codes: H04B 7/15542 Selecting at relay station its transmit and receive resources selection of wireless resources by user or terminal H04W72/02; arrangements affording multiple use of the transmission path by two-dimensional division of the resources H04L5/0003, or by allocating sub-channels H04L5/003
• CPC Class Codes: H04B 7/15585 by interference cancellation
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow

Abstract

The present invention relates to a system and method for extending the coverage area and communication capacity of a spread-spectrum based wireless network through the use of intelligent repeaters. The system comprises a wireless communication network augmented with low cost channel selective repeaters that is capable of repeating only desired signals, thereby suppressing undesirable interference and increasing network capacity. The repeaters can be integrated into an existing wireless network with minimal impact to the existing network layer topology or control structure.

Claims

1-35. -35. (canceled)

36. A method for selectively repeating RF signals communicated between a base station and a plurality of UEs in a wireless network, comprising:

receiving an RF signal transmitted from the base station;

identifying initial communication channels embedded in the RF signal used for downlink communication from the base station to the plurality of UEs, wherein each of the initial communication channels is applied with an associated base gain provided by the base station;

monitoring a signal-to-interference-plus-noise ratio (SINR) of each of the communication channels;

upon detecting the SINR of a first one of the initial communication channels reaching a first predetermined threshold, selecting the first initial communication channel and an associated first one of the UEs, and applying a selected gain value to the selected first initial communication channel to generate an amplified version of the first initial communication channel for repetition; and

firstly determining whether the SINR of the amplified version of the first initial communication channel reaches a second predetermined threshold;

secondly determining whether the first initial communication channel dominates the amplified version of the first initial communication channel at the associated first UE; and

varying the associated base gain and/or the selected gain value to maintain a desired value of the SINR at the associated first UE of the dominating one of the first initial communication channel and the amplified version of the first initial communication channel.

37. The method of claim 36, wherein the first initial communication channel dominates the amplified version of the first initial communication channel when the SINR of the first initial communication channel at the associated first UE is greater than the SINR of the amplified version of the first initial communication channel by a predetermined margin.