Methods and apparatus for subframe configuration and generation in a multi-carrier communication system
AssigneeGuangdong Oppo Mobile Telecommunications Corp., Ltd.
InventorsXiaodong Li, Titus Lo, Kemin Li, Haiming Huang
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Abstract
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.
Claims16
A method for a base station in a cell of a multi-cell wireless system, the method comprising:
- broadcasting a signal containing a cell identity associated with the cell;
- scrambling data before modulation based on the cell identity;
- modulating the scrambled data to produce modulated data symbols;
- mapping the modulated data symbols to a plurality of orthogonal frequency division multiplexing (OFDM) subcarriers in a subchannel, wherein the base station uses a transmission frame structure, each frame comprising a plurality of subframes, each subframe comprising a plurality of time slots, and each time slot comprising a plurality of OFDM symbols;
- and
- transmitting data over the subchannel to a mobile station in the cell.
A base station in a cell of a multi-cell wireless system, the base station comprising:
- a transmitter configured to:
- broadcast a signal containing a cell identity associated with the cell;
- and
- transmit data over a plurality of orthogonal frequency division multiplexing (OFDM) subcarriers in a subchannel to a mobile station in the cell, wherein the base station uses a transmission frame structure, each frame comprising a plurality of subframes, each subframe comprising a plurality of time slots, and each time slot comprising a plurality of OFDM symbols;
- and
- a controller configured to:
- scramble the data before modulation based on the cell identity;
- modulate the scrambled data to produce modulated data symbols;
- and
- map the modulated data symbols to the plurality of OFDM subcarriers in the subchannel.
A method for a mobile station in a cell of a multi-cell wireless system, the method comprising:
- transmitting an uplink signal to a base station in the cell, the uplink signal carrying control information, data packets, or both control information and data packets;
- receiving, from the base station, a signal containing a cell identity associated with the cell;
- receiving, from the base station, data over a subchannel containing a plurality of orthogonal frequency division multiplexing (OFDM) subcarriers within a frequency channel, wherein:
- the received data were scrambled before modulation based on the cell identity;
- the scrambled data were modulated to produce modulated data symbols;
- and
- the modulated data symbols were mapped to the plurality of OFDM subcarriers in the subchannel.
A mobile station in a cell of a multi-cell wireless system, the mobile station comprising:
- a transmitter configured to transmit an uplink signal to a base station in the cell, the uplink signal carrying control information, data packets, or both control information and data packets;
- and
- a receiver configured to:
- receive, from the base station, a signal containing a cell identity associated with the cell;
- and
- receive, from the base station, data over a subchannel containing a plurality of orthogonal frequency division multiplexing (OFDM) subcarriers within a frequency channel, wherein:
- the received data were scrambled before modulation based on the cell identity;
- the scrambled data were modulated to produce modulated data symbols;
- and
- the modulated data symbols were mapped to the plurality of OFDM subcarriers in the subchannel.
Dependencies are inferred from the claim text.