(12) United States Patent ao) Patent No.: us 6,748,212 B2
Schmutz et al. (45) Date of Patent: Jun. 8,2004
(54) METHOD AND APPARATUS FOR
BACKHAUL LINK DIAGNOSTIC IN A
WIRELESS REPEATER SYSTEM
(75) Inventors: Thomas R. Schmutz, Indialantic, FL (US); Michael A. Komara, Indialantic, FL (US)
(73) Assignee: Airnet Communications Corporation,
Melbourne, FL (US)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 446 days.
(21) Appl. No.: 09/736,031
(22) Filed: Dec. 13, 2000
(65) Prior Publication Data
US 2002/0028675 Al Mar. 7, 2002
Related U.S. Application Data
(60) Provisional application No. 60/173,445, filed on Dec. 29, 1999.
(51) Int. CI.7 H04B 7/14; H04B 17/00;
(52) U.S. CI 455/424; 455/423; 455/422.1;
455/16; 455/67.11; 455/67.13
(58) Field of Search 455/422.1, 423,
455/424, 445, 446, 447, 450, 454, 8, 9, 10, 13.1, 16, 501, 20, 24, 500, 522, 524, 63.1, 67.1, 67.13, 69, 67.14
(56) References Cited
U.S. PATENT DOCUMENTS
The invention discloses a method and apparatus for diagnosing a backhaul communications link between a repeater station and a base transceiver station of a wireless communication system. Adjacent and co-channel interference can severely degrade the performance of the backhaul communication link. As a result, the conditions on the backhaul link channels can be continually monitored to ensure optimal performance of the link.
Each RF channel on the backhaul communication link is individually diagnosed. A signal is then sent over the RF channel and the signal strength is measured along with any adjacent and co-channel interference. The measured statistics are then sent back to the base transceiver station.
In a further embodiment of the invention, the power level of a RF carrier signal on the backhaul communication link is measured and the carrier signal is then turned off. The power levels on the adjacent channels—above and below are then measured. Based on these measurements and other channel statistics, the power level of the RF carrier signal is accordingly adjusted.