IMPROVED FRAME STRUCTURE FOR A COMMUNICATION SYSTEM USING ADAPTIVE MODULATION
摘要
A system and method for mapping a combined frequency division duplexing (FDD) Time Division Multiplexing (TDM)/Time Division Multiple Access (TDMA) downlink subframe for use with half-duplex and full-duplex terminals in a communication system. Embodiments of the downlink subframe vary Forward Error Correction (FEC) types for a given modulation scheme as well as support the implementation of a smart antennae at a base station in the communication system. Embodiments of the system are also used in a TDD communication system to support the implementation of smart antennae. A scheduling algorithm allows TDM and TDMA portions of a downlink to efficiently co-exist in the same downlink subframe and simultaneously support full and half-duplex terminals. The algorithm further allows the TDM of multiple terminals in a TDMA burst to minimize the number of map entries in a downlink map. The algorithm limits the number of downlink map entries to not exceed 2n + 1, where n is the number of DL PHY modes (modulation/FEC combinations) employed by the communication system.
申请公布号
WO0241520(A3)
申请公布日期
2002.12.19
申请号
WO2001US43582
申请日期
2001.11.15
申请人
ENSEMBLE COMMUNICATIONS, INC.
发明人
STANWOOD, KENNETH, L.;KLEIN, ISRAEL, JAY;LIN, GEORGE;CHEN, AN