System and method for uplink multiple input multiple output transmission
First Claim
1. A method of wireless communication, comprising:
- receiving from a base station, a primary scheduling grant comprising a first traffic to pilot power ratio;
transmitting a primary pilot channel and an enhanced primary data channel on a first virtual antenna of a multiple input multiple output (MIMO) uplink transmission, wherein a ratio between the power of the enhanced primary data channel and the power of the primary pilot channel corresponds to the first traffic to pilot power ratio;
determining a size of a packet transmitted on the enhanced primary data channel in accordance with the first traffic to pilot power ratio by looking up a transport block size that corresponds to the first traffic to pilot power ratio;
determining a reference power level corresponding to a secondary pilot channel;
determining a rank of the transmission;
transmitting an enhanced secondary data channel on a second virtual antenna of the MIMO uplink transmission based on the determined rank; and
transmitting the secondary pilot channel on the second virtual antenna at a boosted power level relative to the reference power level,wherein a difference between the reference power level and the boosted power level is determined in accordance with the size of a packet transmitted on the enhanced primary data channel,wherein a ratio between the power of the enhanced secondary data channel and the power of the secondary pilot channel corresponds to the same first traffic to pilot power ratio, andwherein the first virtual antenna and the second virtual antenna utilize the same carrier frequency.
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Accused Products
Abstract
Methods and apparatuses are provided for uplink MIMO transmissions in a wireless communication system. In particular, an enhanced pilot reference may be provided for enabling increased data rates on a secondary stream. Specifically, a primary stream, provided on a primary virtual antenna, includes an enhanced primary data channel E-DPDCH, a primary control channel DPCCH, and an enhanced primary control channel E-DPCCH. Further, a secondary stream, provided on a secondary virtual antenna, includes an enhanced secondary data channel S-E-DPDCH and a secondary control channel S-DPCCH. Here, the secondary control channel S-DPCCH may be transmitted at a boosted power level relative to a determined reference power level.
79 Citations
20 Claims
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1. A method of wireless communication, comprising:
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receiving from a base station, a primary scheduling grant comprising a first traffic to pilot power ratio; transmitting a primary pilot channel and an enhanced primary data channel on a first virtual antenna of a multiple input multiple output (MIMO) uplink transmission, wherein a ratio between the power of the enhanced primary data channel and the power of the primary pilot channel corresponds to the first traffic to pilot power ratio; determining a size of a packet transmitted on the enhanced primary data channel in accordance with the first traffic to pilot power ratio by looking up a transport block size that corresponds to the first traffic to pilot power ratio; determining a reference power level corresponding to a secondary pilot channel; determining a rank of the transmission; transmitting an enhanced secondary data channel on a second virtual antenna of the MIMO uplink transmission based on the determined rank; and transmitting the secondary pilot channel on the second virtual antenna at a boosted power level relative to the reference power level, wherein a difference between the reference power level and the boosted power level is determined in accordance with the size of a packet transmitted on the enhanced primary data channel, wherein a ratio between the power of the enhanced secondary data channel and the power of the secondary pilot channel corresponds to the same first traffic to pilot power ratio, and wherein the first virtual antenna and the second virtual antenna utilize the same carrier frequency. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus configured for wireless communication, the apparatus comprising:
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means for receiving from a base station, a primary scheduling grant comprising a first traffic to pilot power ratio; means for transmitting a primary pilot channel and an enhanced primary data channel on a first virtual antenna of a multiple input multiple output (MIMO) uplink transmission, wherein a ratio between the power of the enhanced primary data channel and the power of the primary pilot channel corresponds to the first traffic to pilot power ratio; means for determining a size of a packet transmitted on the enhanced primary data channel in accordance with the first traffic to pilot power ratio by looking up a transport block size that corresponds to the first traffic to pilot power ratio; means for determining a reference power level corresponding to a secondary pilot channel; means for determining a rank of the transmission; means for transmitting an enhanced secondary data channel on a second virtual antenna of the MIMO uplink transmission based on the determined rank; and means for transmitting the secondary pilot channel on the second virtual antenna at a boosted power level relative to the reference power level, wherein a difference between the reference power level and the boosted power level is determined in accordance with the size of a packet transmitted on the enhanced primary data channel, wherein a ratio between the power of the enhanced secondary data channel and the power of the secondary pilot channel corresponds to the same first traffic to pilot power ratio, and wherein the first virtual antenna and the second virtual antenna utilize the same carrier frequency. - View Dependent Claims (7, 8, 9, 10)
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11. A computer program product, comprising:
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a non-transitory computer-readable medium comprising instructions for causing a computer to; receive from a base station, a primary scheduling grant comprising a first traffic to pilot power ratio; transmit a primary pilot channel and an enhanced primary data channel on a first virtual antenna of a multiple input multiple output (MIMO) uplink transmission, wherein a ratio between the power of the enhanced primary data channel and the power of the primary pilot channel corresponds to the first traffic to pilot power ratio; determine a size of a packet transmitted on the enhanced primary data channel in accordance with the first traffic to pilot power ratio by looking up a transport block size that corresponds to the first traffic to pilot power ratio; determine a reference power level corresponding to a secondary pilot channel; determine a rank of the transmission; transmit an enhanced secondary data channel on a second virtual antenna of the MIMO uplink transmission based on the determined rank; and transmit the secondary pilot channel on the second virtual antenna at a boosted power level relative to the reference power level, wherein a difference between the reference power level and the boosted power level is determined in accordance with the size of a packet transmitted on the enhanced primary data channel, wherein a ratio between the power of the enhanced secondary data channel and the power of the secondary pilot channel corresponds to the same first traffic to pilot power ratio, and wherein the first virtual antenna and the second virtual antenna utilize the same carrier frequency. - View Dependent Claims (12, 13, 14, 15)
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16. An apparatus for wireless communication, comprising:
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a transmitter for transmitting a primary virtual antenna and a secondary virtual antenna of a multiple input multiple output (MIMO) uplink transmission; at least one processor for controlling the transmitter; and a memory coupled to the at least one processor, wherein the at least one processor is configured to; receive from a base station, a primary scheduling grant comprising a first traffic to pilot power ratio; transmit a primary pilot channel and an enhanced primary data channel on the primary virtual antenna, wherein a ratio between the power of the enhanced primary data channel and the power of the primary pilot channel corresponds to the first traffic to pilot power ratio; determine a size of a packet transmitted on the enhanced primary data channel in accordance with the first traffic to pilot power ratio by looking up a transport block size that corresponds to the first traffic to pilot power ratio; determine a reference power level corresponding to a secondary pilot channel; determine a rank of the transmission; transmit an enhanced secondary data channel on the secondary virtual antenna based on the determined rank; and transmit the secondary pilot channel on the secondary virtual antenna at a boosted power level relative to the reference power level, wherein a difference between the reference power level and the boosted power level is determined in accordance with the size of a packet transmitted on the enhanced primary data channel, wherein a ratio between the power of the enhanced secondary data channel and the power of the secondary pilot channel corresponds to the same first traffic to pilot power ratio, and wherein the primary virtual antenna and the secondary virtual antenna utilize the same carrier frequency. - View Dependent Claims (17, 18, 19, 20)
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Specification