PARTIAL DISCARDING OF CYCLIC PREFIX FOR EFFICIENT TDD OR HALF-DUPLEX FDD OPERATION
First Claim
1. A method for wireless communication, comprising:
- receiving a first orthogonal frequency division multiplexing (OFDM) symbol via a first link;
discarding a first amount of cyclic prefix for the first OFDM symbol;
receiving a second OFDM symbol via the first link following the first OFDM symbol;
determining a switch time to switch from data reception on the first link to data transmission on a second link;
determining a second amount of cyclic prefix to discard based on the switch time, the second amount of cyclic prefix being less than the first amount of cyclic prefix; and
discarding the second amount of cyclic prefix for the second OFDM symbol.
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Accused Products
Abstract
Techniques for performing partial cyclic prefix discarding are described. A user equipment (UE) may reduce the amount of cyclic prefix to discard for the last OFDM symbol prior to a switch from data reception to data transmission. This may allow the UE to complete data reception earlier and to switch to data transmission in a timely manner. In one design, the UE may receive a first OFDM symbol and discard a first amount of cyclic prefix for the first OFDM symbol. The UE may then receive a second OFDM symbol and discard a second amount of cyclic prefix for the second OFDM symbol. The second amount of cyclic prefix to discard may be determined based on the amount of time needed to switch from data reception to data transmission, which may be dependent on the amount of time advance between transmit timing and receive timing at the UE.
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Citations
23 Claims
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1. A method for wireless communication, comprising:
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receiving a first orthogonal frequency division multiplexing (OFDM) symbol via a first link; discarding a first amount of cyclic prefix for the first OFDM symbol; receiving a second OFDM symbol via the first link following the first OFDM symbol; determining a switch time to switch from data reception on the first link to data transmission on a second link; determining a second amount of cyclic prefix to discard based on the switch time, the second amount of cyclic prefix being less than the first amount of cyclic prefix; and discarding the second amount of cyclic prefix for the second OFDM symbol. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An apparatus for wireless communication, comprising:
at least one processor configured to receive a first orthogonal frequency division multiplexing (OFDM) symbol via a first link, to discard a first amount of cyclic prefix for the first OFDM symbol, to receive a second OFDM symbol via the first link following the first OFDM symbol, to determine a switch time to switch from data reception on the first link to data transmission on a second link, to determine a second amount of cyclic prefix to discard based on the switch time, the second amount of cyclic prefix being less than the first amount of cyclic prefix, and to discard the second amount of cyclic prefix for the second OFDM symbol. - View Dependent Claims (14, 15, 16, 17)
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18. An apparatus for wireless communication, comprising:
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means for receiving a first orthogonal frequency division multiplexing (OFDM) symbol via a first link; means for discarding a first amount of cyclic prefix for the first OFDM symbol; means for receiving a second OFDM symbol via the first link following the first OFDM symbol; means for determining a switch time to switch from data reception on the first link to data transmission on a second link; means for determining a second amount of cyclic prefix to discard based on the switch time, the second amount of cyclic prefix being less than the first amount of cyclic prefix; and means for discarding the second amount of cyclic prefix for the second OFDM symbol. - View Dependent Claims (19, 20, 21, 22)
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23. A computer program product, comprising:
a computer-readable medium comprising; code for causing at least one computer to receive a first orthogonal frequency division multiplexing (OFDM) symbol via a first link, code for causing at least one computer to discard a first amount of cyclic prefix for the first OFDM symbol, code for causing at least one computer to receive a second OFDM symbol via the first link following the first OFDM symbol, code for causing at least one computer to determine a switch time to switch from data reception on the first link to data transmission on a second link, code for causing at least one computer to determine a second amount of cyclic prefix to discard based on the switch time, the second amount of cyclic prefix being less than the first amount of cyclic prefix, and code for causing at least one computer to discard the second amount of cyclic prefix for the second OFDM symbol.
Specification