METHODS AND APPARATUS FOR SUBFRAME CONFIGURATION AND GENERATION IN A MULTI-CARRIER COMMUNICATION SYSTEM

摘要

Methods and apparatus for subframe configuration and generation in a multi-cell multi-carrier system. A frame for radio transmission in the system consists of multiple subframes, and each subframe consists of multiple Orthogonal Frequency Division Multiplexing (OFDM) symbols. Training symbols, frequency-domain data scrambling, size of Fast-Fourier Transform (FFT), or length of cyclic prefix can be configured differently for each subframe to facilitate different applications, such as unicasting or broadcasting.

主权项

1. A method for a base station in a cell of a multi-cell wireless system using a transmission frame structure, each frame comprising a plurality of subframes, each subframe comprising a plurality of time slots, each time slot comprising a plurality of orthogonal frequency division multiplexing (OFDM) symbols, the method comprising:
broadcasting a control signal containing a cell identity associated with the cell of the base station; forming a subchannel by selecting a plurality of OFDM subcarriers within a frequency channel in a time slot; and transmitting data over the subchannel to a mobile station in the cell, wherein:
the data are scrambled based on the cell identity;the scrambled data are modulated to produce modulated data symbols; andthe modulated data symbols are mapped, based on the cell identity, to the plurality of OFDM subcarriers in the subchannel.