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

• US 7,006,461 B2
• Filed: 09/30/2002
• Issued: 02/28/2006
• Est. Priority Date: 09/17/2001
• Status: Expired due to Term

• Current Assignee: Leidos, Inc. (Leidos Holdings, Inc.)
• Original Assignee: Science Applications International Corporation
• Inventors: Slocumb, Travis H. III, Kilfoyle, Daniel B., Carson, Steven
• Primary Examiner(s): Yao, Kwang Bin
• Application Number:
  US10/259,395
• Publication Number:
  US 20030214919A1
• Time in Patent Office: 1,247 Days
• Field of Search: 370/501, 370276-296, 370/310, 370315-321, 370328-332, 370335-337, 370342-344, 370/437, 370441-443, 370/445, 370478-480, 370491-492, 370/324, 370/350, 370/516, 370/519, 455/442, 455 7- 25, 455/179.1, 455/67.16
• US Class Current: 370/315
• 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. A wireless communication network comprising:

at least one designated area;

one base station associated with each of the at least one designated area, wherein the base station provides wireless communication to a plurality of user equipments (UEs) wishing to access the network by transmitting dowulink signals to the UEs; and

a repeater associated with the base station, wherein the repeater captures the downlink signals sent by the base station to the UEs, wherein the repeater is capable of discriminately selecting one of the captured downlink signals sent to a selected one of the UEs and amplifying and transmitting the selected downlink signal; and

wherein the selected UE can tolerate a predetermined time delay between the time that the selected downlink signal is transmitted by the base station and the time the selected downlink signal is amplified and transmitted by the repeater;

and wherein the repeater is capable of selecting, amplifying, and transmitting the selected downlink signal within the predetermined time delay.

2. A method for receiving and repeating RF signals, comprising:

receiving a first RF signal;

processing the first RF signal to discern data channels from control channels;

selecting one of the data channels based on predetermined criteria;

amplifying and converting the selected data channel into a first output RF signal;

transmitting the first output RF signal in-band;

determining a tolerance for time delay of the transmitted RF signals; and

insuring that the processing, selecting, and converting steps are within the tolerance for time delay.

3. The method of claim 2, wherein the received RF signals are intended for a plurality of subscriber units, and the tolerance for time delay comprises an allowable time delay for one of the subscriber unit to accommodate diversity combining of data channels.

4. The method of claim 2, wherein the insuring step includes setting a software parameter in a wireless network that includes the subscriber units for a time delay search window around one of the control channel time references.