Beam wobbling for increased downlink coverage and capacity

Details Beam wobbling for increased downlink coverage and capacity Beam wobbling for increased downlink coverage and capacity

2007-02-27

2011-11-29

Cai, Wayne (Department: 2617)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S561000, C455S450000, C455S452100

Reexamination Certificate

active

08068876

ABSTRACT:
A method and apparatus for reducing signal interference within a cellular radio system to increase both coverage and capacity. The method and apparatus include altering the direction of beams within cell sectors is among discrete angular positions according to a predetermined, cyclic pattern. The predetermined, cyclic pattern varies in a group of adjacent cell sectors such that inter-cell interference is significantly reduced or eliminated by rotating at a different cycle the beams in adjacent cells. This discrete, angular movement of beams provides for downlink transmissions to be timed in such a way (i.e., scheduled) such that transmission to a user will occur in accordance with the beam and time slot having the best carrier to interference (C/I) ratio for that user.

REFERENCES:
patent: 5448753 (1995-09-01), Ahl et al.
patent: 6181955 (2001-01-01), Dartois
patent: 6339708 (2002-01-01), Wang
patent: 6400955 (2002-06-01), Kawabata et al.
patent: 6542478 (2003-04-01), Park
patent: 2002/0090979 (2002-07-01), Sydor
patent: 2004/0214582 (2004-10-01), Lan et al.
patent: 2005/0068230 (2005-03-01), Munoz et al.
patent: 2005/0143132 (2005-06-01), Proctor, Jr. et al.
Shim et al., “Should the Smart Antenna Be A Tracking Beam Array Or Switching Beam Array?”, IEEE Vehicular Technology Conference, 1998, pp. 494-498.
Zekavat et al., “Smart Antenna Arrays with Oscillating Beam Patterns: Characterization of Transmit Diversity in Semi-Elliptic Coverage”, IEEE Transaction on Communications, vol. 50, No. 10, Oct. 2002, pp. 1549-1556.

Affiliated with

Also associated with

Rating

Beam wobbling for increased downlink coverage and capacity does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Beam wobbling for increased downlink coverage and capacity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Beam wobbling for increased downlink coverage and capacity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4270845