Method and apparatus for providing downlink delay diversity

Details Method and apparatus for providing downlink delay diversity Method and apparatus for providing downlink delay diversity

2005-01-21

2010-10-12

Patel, Ajit (Department: 2617)

Multiplex communications

Duplex

C370S280000, C370S465000, C370S468000, C370S329000, C370S331000, C455S450000, C455S423000, C455S436000, C455S437000, C455S329000

Reexamination Certificate

active

07813306

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.

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