Multiplex communications – Communication over free space – Combining or distributing information via frequency channels
Reexamination Certificate
2005-04-05
2009-12-08
Patel, Ajit (Department: 2617)
Multiplex communications
Communication over free space
Combining or distributing information via frequency channels
C370S203000, C370S334000, C370S343000
Reexamination Certificate
active
07630356
ABSTRACT:
Aspects of the present invention provide MAC enhancements to support the PHY features of a MIMO-OFDMA framework. The MAC enhancements involve DL burst assignment to support adaptive MIMO transmission, UL burst assignment to support adaptive MIMO transmission, fast feedback channel operation to support wireless terminal dynamic feedback of MIMO mode selection, for example space time transmit diversity (STTD) or spatial multiplexing (SM), and/or permutation mode selection, for example diversity or adjacent subcarrier mode, dynamic CQICH allocation and de-allocation and the use of CQICH_ID for DL burst allocation. One or more of these enhancements is included in a given implementation. Methods are also provided for implementing the MAC enhancements.
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IEEE Std 802.16-2004: Alr Interface for Fixed Broadband Wireless Access Systems, Oct. 17, 2004, pp. 562-566.
Fong Mo-Han
Periyalwar Shalini
Zhang Hang
Zhu Peiying
Christopher & Weisberg P.A.
Cosme Natasha
Nortel Networks Limited
Patel Ajit
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