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:
Oct. 12, 2010
Filed:
Jan. 21, 2005
Dipesh Shah, Fremont, CA (US);
Dipesh Shah, Fremont, CA (US);
AT&T Mobility II LLC, Atlanta, GA (US);
Abstract
A method and apparatus for providing downlink transmit delay diversity (TDD). In accordance with the invention, a BTS includes at least one simplex transceiver (S-TRX) that does not implement downlink TDD and at least one duplex transceiver (D-TRX) that does implement TDD. In accordance with the preferred embodiment, the BTS has 'N' S-TRXs and 'A' D-TRXs, where N and A are positive integers and A is less than N. When downlink TDD is implemented, a total of N+A transceivers may be used (i.e., N S-TRXs and A D-TRXs). When downlink TDD is not needed, as many as N S-TRXs may be used. When downlink TDD is not needed, typically no D-TRXs are used. Therefore, the present invention reduces the amount of resources that is required to implement downlink TDD. In addition, the present invention efficiently utilizes resources by preferably implementing downlink TDD only when it is needed.