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US 8,711,835 B2Granted
OFDM control signaling in the presence of timing asynchronization in a peer-to-peer network
AssigneeQUALCOMM Incorporated
InventorsJunyi Li, Rajiv Laroia, Xinzhou Wu
Life of this patent
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Abstract
Systems and methodologies are described that facilitates mitigating the affects of asynchronous behavior when transmitting a data signal. According to various aspects, the system and methods are employed for selectively appending an appropriate time-shifting mechanism to a data signal in order to rectify the negative affects of asynchronous time behavior during a logical data burst.
Claims14
A method of operating a first mobile terminal in a peer-to-peer network, comprising:
- determining that said first mobile terminal and one or more receiving mobile terminals are communicating in an asynchronous manner;
- determining a maximum time offset due to said asynchronous communication;
- generating a zero padded symbol including a first zero-energy padding portion and a non-zero energy portion, said first zero-energy padding portion including zero energy, said non-zero energy portion including signal energy;
- and
- transmitting said zero padded symbol,
- wherein said first zero-energy padding portion of the zero padded symbol precedes said non-zero energy portion of the zero padded symbol, said first zero-energy padding portion is larger than said determined maximum time offset, and a second zero-energy padding portion is positioned, in said zero padded symbol, following said non-zero energy portion.
3 more elements
A method of operating a first mobile terminal in a peer-to-peer network, comprising:
- determining that said first mobile terminal and one or more receiving mobile terminals are communicating in an asynchronous manner;
- determining a maximum time offset due to said asynchronous communication;
- generating a zero padded symbol including a first zero-energy padding portion and a non-zero energy portion, said first zero-energy padding portion including zero energy, said non-zero energy portion including signal energy;
- and
- transmitting said zero padded symbol,
- wherein said first zero-energy padding portion of the zero padded symbol precedes said non-zero energy portion of the zero padded symbol, said zero padded symbol further includes a second zero-energy padding portion, generating a zero padded symbol includes positioning said first zero-energy padding portion in said zero padded symbol before said non-zero energy portion and positioning said second zero-energy padding portion in said zero padded symbol after said non-zero energy portion, said first and second zero-energy padding portions are the same size, and said first and second zero-energy padding portions are equal to said maximum time offset.
3 more elements
A first mobile terminal in a peer-to-peer network, comprising:
- a determination module for determining that said first mobile terminal and one or more receiving mobile terminals are communicating in an asynchronous manner;
- a module for determining a maximum time offset due to said asynchronous communication;
- a symbol generation module for generating a zero padded symbol including a first zero-energy padding portion and a non-zero energy portion, said first zero-energy padding portion including zero energy, said non-zero energy portion including signal energy;
- and
- a transmitter module for transmitting said zero padded symbol,
- wherein said first zero-energy padding portion of the zero padded symbol precedes said non-zero energy portion of the zero padded symbol, and
- wherein said first zero-energy padding portion is larger than said determined maximum time offset, and said symbol generation module is further for positioning a second zero-energy padding portion, in said zero padded symbol, following said non-zero energy portion.
4 more elements
A first mobile terminal in a peer-to-peer network, comprising:
- means for determining that said first mobile terminal and one or more receiving mobile terminals are communicating in an asynchronous manner;
- means for determining a maximum time offset due to said asynchronous communication;
- means for generating a zero padded symbol including a first zero-energy padding portion and a non-zero energy portion, said first zero-energy padding portions including zero energy, said non-zero energy portion including signal energy;
- and
- means for transmitting said zero padded symbol,
- wherein said first zero-energy padding portion of the zero padded symbol precedes said non-zero energy portion of the zero padded symbol, said first-zero energy padding portion is larger than said determined maximum time offset, and said means for generating a zero padded symbol is further configured to position a second zero-energy padding portion, in said zero padded symbol, following said non-zero energy portion.
3 more elements
A non-transitory machine readable medium including machine executable instructions, for use in a first mobile terminal, said non-transitory machine readable medium comprising:
- instructions for causing said first mobile terminal to determine that said first mobile terminal and one or more receiving mobile terminals are communicating in an asynchronous manner;
- instructions for causing said first mobile terminal to determine a maximum time offset due to asynchronous communication;
- instructions for causing said first mobile terminal to generate a zero padded symbol including a first zero-energy padding portion and a non-zero energy portion, said first zero-energy padding portion including zero energy, said non-zero energy portion including signal energy;
- and
- instructions for causing said first mobile terminal to transmit said zero padded symbol,
- wherein said first zero-energy padding portion of the zero padded symbol precedes said non-zero energy portion of the zero padded symbol, said first zero-energy padding portion is larger than said determined maximum time offset, and said instructions for generating a zero padded symbol further include instructions for positioning a second zero-energy padding portion in said zero padded symbol after said non-zero energy portion.
3 more elements
A first mobile communications device, comprising:
- at least one processor configured to control said first mobile communications device to:
- determine that said first mobile communications device and one or more receiving mobile communications device are communicating in an asynchronous manner;
- determine a maximum time offset due to said asynchronous communication;
- generate a zero padded symbol including a first zero-energy padding portion and a non-zero energy portion, said first zero-energy padding portion including zero energy, said non-zero energy portion including signal energy;
- and
- transmit said zero padded symbol;
- and
- a memory coupled to said at least one processor,
- wherein said first zero-energy padding portion of the zero padded symbol precedes said non-zero energy portion of the zero padded symbol, said first-zero energy padding portion is larger than said determined maximum time offset, and a second zero-energy padding portion is positioned, in said zero padded symbol, following said non-zero energy portion.
6 more elements
Dependencies are inferred from the claim text.