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:
May. 05, 2009
Filed:
Apr. 10, 2007
Alejandro Schwartzman, San Jose, CA (US);
Paul Lafferty, Hayward, CA (US);
Weiliang Zhu, San Jose, CA (US);
Timothy Finan, Milford, NH (US);
Alejandro Schwartzman, San Jose, CA (US);
Paul Lafferty, Hayward, CA (US);
Weiliang Zhu, San Jose, CA (US);
Timothy Finan, Milford, NH (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
Methods and apparatus are provided for determining transmission power levels. The power characteristics of a cable modem family are determined by testing cable modems in a cable modem family with various downstream frequencies and transmission power levels to determine internal gain levels. The power characteristics of the cable modem family can then be stored in an efficient manner in each cable modem by using interpolation. The individual cable modem can then be characterized by testing the cable modem with a limited set of downstream frequencies and transmission power levels to determine an internal gain level offset for that particular cable modem. With the power characteristics table, internal gain level offset, and interpolation, transmission power levels can be determined during network operation when downstream frequencies and internal gain levels are known.