The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 13, 2007
Filed:
Apr. 25, 2002
John E. Hudson, Stansted, GB;
David G. Steer, Nepean, CA;
Bassam M. Hashem, Nepean, CA;
Daniel Boudreau, Hull, CA;
Koon Hoo Teo, Nepean, CA;
John E. Hudson, Stansted, GB;
David G. Steer, Nepean, CA;
Bassam M. Hashem, Nepean, CA;
Daniel Boudreau, Hull, CA;
Koon Hoo Teo, Nepean, CA;
Nortel Networks Ltd., St. Laurent, CA;
Abstract
It is becoming increasingly important to improve data throughput in wireless networks. By transmitting data simultaneously at different modulation amplitudes and/or using different code strengths, terminals having different carrier to noise ratios are able to decode the different amplitude levels with varying degrees of success. This allows distant terminals to receive low data rate transmissions at high modulation levels or code rates while nearer terminals can use additional capacity in the transmission by receiving lower level modulation signals or code rates. In this way, distant terminals do not degrade overall network performance. By arranging for terminals to acknowledge receipt of data, retransmission at different modulation levels or code rates may be carried out by the base station in order to improve performance in the presence of noise without a priori knowledge of the carrier to noise ratio for a particular terminal.