System and method for supporting multiple reverse link data streams
First Claim
1. A method of communicating in an Evolution Data Optimized (EV-DO) network performed by an access terminal having a plurality of antennas, the method comprising:
- determining a number of reverse link data streams to transmit;
determining a selection of antennas from the plurality of antennas for transmitting the reverse link data streams;
determining beamforming parameters based at least in part on a beamforming identifier;
transmitting a first data stream comprising a first medium access control (MAC) index using the selection of antennas, the first data stream being transmitted via the selection of antennas in accordance with the beam-forming parameters; and
transmitting a second data stream comprising a second MAC index, the second data stream being transmitted in response to determining that the number of reverse link data streams is at least two, the second data stream being transmitted concurrently with the first data stream, and the second data stream being transmitted via the selection of antennas using a beam direction that is orthogonal to a beam direction of the first data stream.
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Accused Products
Abstract
Techniques for rank adaptation and multiple-stream reverse link communications in a wireless access network are disclosed. A remote unit transmits one or more reverse link data streams using separate identifiers to a base station. The number of reverse link data streams may be determined according to feedback from the base station or it may be determined by testing one or more multiple-antenna transmit hypotheses. The base station may estimate channel conditions using information obtained from the one or more reverse link data streams and may determine a spatial rank of the communication channel. The remote unit may perform separate error control and power control processes for each reverse link data stream in cooperation with the base station.
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Citations
35 Claims
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1. A method of communicating in an Evolution Data Optimized (EV-DO) network performed by an access terminal having a plurality of antennas, the method comprising:
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determining a number of reverse link data streams to transmit; determining a selection of antennas from the plurality of antennas for transmitting the reverse link data streams; determining beamforming parameters based at least in part on a beamforming identifier; transmitting a first data stream comprising a first medium access control (MAC) index using the selection of antennas, the first data stream being transmitted via the selection of antennas in accordance with the beam-forming parameters; and transmitting a second data stream comprising a second MAC index, the second data stream being transmitted in response to determining that the number of reverse link data streams is at least two, the second data stream being transmitted concurrently with the first data stream, and the second data stream being transmitted via the selection of antennas using a beam direction that is orthogonal to a beam direction of the first data stream. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An Evolution Data Optimized (EV-DO)-enabled access terminal, the access terminal comprising:
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a plurality of antennas; a plurality of transceivers, wherein each transceiver is coupled to a corresponding antenna in the plurality of antennas; and a controller coupled to the transceivers and configured; to determine beamforming parameters based at least in part on a beamforming identifier; to determine a number of reverse link data streams to transmit, to determine a selection of antennas from the plurality of antennas for transmitting the reverse link data streams, to transmit a first data stream comprising a first medium access control (MAC) index, the first data stream being transmitted via the selection of antennas in accordance with the beam-forming parameters, and to transmit a second data stream comprising a second MAC index the second data stream being transmitted in response to determining that the number of reverse link data streams is at least two, the second data stream being transmitted concurrently with the first data stream, and the second data stream being transmitted via the selection of antennas using a beam direction that is orthogonal to a beam direction of the first data stream. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. An Evolution Data Optimized (EV-DO)-enabled access terminal, comprising:
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means for determining a number of reverse link data streams to transmit; means for determining a selection of antennas from a plurality of antennas for transmitting the reverse link data streams; means for determining beamforming parameters based at least in part on a beamforming identifier; means for transmitting a first data stream comprising a first medium access control (MAC) index, the first data stream being transmitted via the selection of antennas in accordance with the beam-forming parameters; and means for transmitting a second data stream comprising a second MAC index, the second data stream being transmitted in response to determining that the number of reverse link data streams is at least two, the second data stream being transmitted concurrently with the first data stream, and the second data stream being transmitted via the selection of antennas using a beam direction that is orthogonal to a beam direction of the first data stream. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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29. A computer program product comprising:
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a processor-readable medium storing non-transitory processor-readable instructions for use with an access terminal in an Evolution Data Optimized (EV-DO) network, wherein the instructions are configured to cause a processor to; determine a number of reverse link data streams to transmit; determine a selection of antennas from a plurality of antennas for transmitting the reverse link data streams; determine beamforming parameters based at least in part on a beamforming identifier; transmit a first data stream comprising a first medium access control (MAC) index, the first data stream being transmitted via the selection of antennas in accordance with the beam-forming parameters; and transmit a second data stream comprising a second MAC index, the second data stream being transmitted in response to determining that the number of reverse link data streams is at least two, the second data stream being transmitted concurrently with the first data stream, and the second data stream being transmitted via the selection of antennas using a beam direction that is orthogonal to a beam direction of the first data stream. - View Dependent Claims (30, 31, 32, 33, 34, 35)
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Specification