Title:
METHOD OF DETECTION OF SIGNALS USING AN ADAPTIVE ANTENNA IN A PEER-TO-PEER NETWORK
Document Type and Number:
WIPO Patent Application WO2003023895
Kind Code:
A3
Abstract:
An adaptive antenna signal identification process to provide increased interference rejection in a wireless data network such as a wireless Local Area Network (LAN) (11-1, 11-2), The adaptive antenna (20-1, 20-2)is located at an access point (14-1, 14-2) and can be steered to various angle of arrival orientations with respect to received signals. Associated radio receiving equipment utilizes two distinct signal detection modes. In a first mode, the directional antenna array is set to have an omni-directional gain pattern. When the invention is deployed in a relay function, where messages received from a first node (12-1-1, 12-2-2, 12-1-n) are to be forwarded to a second node (12-2-p), the recorded direction of its best reception is retrieved for the second node (12-2-p) and used when the antenna array (20-1, 20-2)is used to transmit the signal to the second node (12-2-p). Storage of the best antenna angle for propagation to neighbor nodes can be handled by control functions in a manner that is analogous to other router lookup tables, such as being contained in a lookup table (25) that stores IP addresses.
Inventors:
PROCTOR JAMES A JR
Application Number:
PCT/US2002/029147
Publication Date:
October 16, 2003
Filing Date:
September 12, 2002
Export Citation:
Assignee:
TANTIVY COMM INC (US)
International Classes:
H04L12/28; H01Q3/26; H01Q25/00; H04B7/26; H04W16/28; (IPC1-7): H04B7/00; H04Q7/00
Foreign References:
| US5767807A | 1998-06-16 |
Other References:
KALIS ET AL.: "Relative direction determination in mobile computing networks", IEEE INSTRUMENTATION AND MEASUREMENT TECHNOLOGY CONFERENCE, vol. 3, 21 May 2001 (2001-05-21) - 23 May 2001 (2001-05-23), pages 1479 - 1484, XP010547207
NASIPURI ET AL.: "A MAC protocol for mobile ad hoc networks using directional antennas", IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE, 23 September 2000 (2000-09-23) - 28 September 2000 (2000-09-28), pages 1214 - 1219, XP002961535
KO ET AL.: "Medium access control protocols using directional antennas in ad hoc networks", IEEE INFOCOM, 26 March 2000 (2000-03-26) - 30 March 2000 (2000-03-30), pages 13 - 21, XP010376001
HORNEFFER ET AL.: "Directed antennas in the mobile broadband system", IEEE INFOCOM, 24 March 1996 (1996-03-24) - 28 March 1996 (1996-03-28), pages 704 - 712, XP010158133
NASIPURI ET AL.: "A MAC protocol for mobile ad hoc networks using directional antennas", IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE, 23 September 2000 (2000-09-23) - 28 September 2000 (2000-09-28), pages 1214 - 1219, XP002961535
KO ET AL.: "Medium access control protocols using directional antennas in ad hoc networks", IEEE INFOCOM, 26 March 2000 (2000-03-26) - 30 March 2000 (2000-03-30), pages 13 - 21, XP010376001
HORNEFFER ET AL.: "Directed antennas in the mobile broadband system", IEEE INFOCOM, 24 March 1996 (1996-03-24) - 28 March 1996 (1996-03-28), pages 704 - 712, XP010158133
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