SYSTEM AND METHOD FOR SUPPORTING MULTIPLE REVERSE LINK DATA STREAMS

• US 20140079155A1
• Filed: 11/25/2013
• Published: 03/20/2014
• Est. Priority Date: 10/24/2008
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: ATTAR, Rashid Ahmed Akbar, WANG, Jibing, KADOUS, Tamer
• Application Number:
  US14/088,759
• Publication Number:
  US 20140079155A1
• Time in Patent Office: Days
• US Class Current: 375/299
• CPC Class Codes: H04B 7/0613 using simultaneous transmission H04B7/0686 takes precedence
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0619 using feedback from receiving side feedback signaling for adaptive modulation/coding H04L1/0001
• CPC Class Codes: H04B 7/0634 Antenna weights or vector/matrix coefficients
• CPC Class Codes: H04B 7/0691 using subgroups of transmit antennas
• CPC Class Codes: H04B 7/0695 using beam selection
• CPC Class Codes: H04W 52/42 in systems with time, space, frequency or polarisation diversity

Abstract

A method for wireless communication includes determining a number of uplink data streams to transmit from a mobile device and determining a selection of antennas from a plurality of antennas for transmitting the uplink data streams. The method also includes determining beamforming parameters based at least in part on a beamforming identifier. The method further includes transmitting a first data stream via the selection of antennas in accordance with the beamforming parameters and transmitting a second data stream in response to determining that the number of uplink data streams is at least two.

Claims

1. A method of communicating in wireless network, the method comprising:

determining a number of uplink data streams to transmit from a mobile device;

determining a selection of antennas from a plurality of antennas for transmitting the uplink data streams;

determining beamforming parameters based at least in part on a beamforming identifier;

transmitting a first data stream via the selection of antennas in accordance with the beamforming parameters; and

transmitting a second data stream in response to determining that the number of uplink 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.

2. The method of claim 1, in which determining the number of uplink data streams comprises receiving feedback from a base station.

3. The method of claim 1, in which determining the number of uplink data streams comprises testing one or more multiple-antenna hypotheses of the mobile device.

4. The method of claim 1, further comprising transmitting a single data stream to a base station using a pair of antennas of the plurality of antennas responsive to determining that the number of uplink data streams is one.

5. The method of claim 1, further comprising receiving the beamforming identifier from a base station.

6. The method of claim 5, further comprising:

transmitting the first data stream with a first phase using a first antenna based at least in part on the beamforming identifier; and

transmitting the first data stream with a second phase using a second antenna based at least in part on the beamforming identifier.

7. The method of claim 1, in which:

the first data stream is transmitted to a base station using a first antenna and a second antenna of the plurality of antennas; and

the second data stream is transmitted with the first antenna and the second antenna.

8. The method of claim 1, further comprising:

receiving from a base station a first power control message;

receiving from the base station a second power control message;

determining a first power level for transmitting the first data stream based at least in part on the first power control message; and

determining a second power level for transmitting the second data stream based at least in part on the second power control message.

9. The method of claim 1, further comprising:

receiving from a base station a first error control message relating to the first data stream;

receiving from the base station a second error control message relating to the second data stream;

performing a first error control process for the first uplink data stream based at least in part on the first error control message; and

performing a second error control process for the second uplink data stream based at least in part on the second error control message.

10. The method of claim 1, in which:

the first data stream comprises a first pilot signal and a second pilot signal orthogonal to the first pilot signal, and

the second data stream is transmitted absent the second pilot signal.

11. The method of claim 1, further comprising:

transmitting the first data stream at a first data rate; and

transmitting the second data stream at a second data rate.

12. The method of claim 11, in which the first data stream comprises a first indicator of the first data rate and the second data stream comprises a second indicator of the second data rate.

13. An apparatus for wireless communication, the apparatus comprising:

a memory unit; and

at least one processor coupled to the memory unit, the at least one processor being configured;

to determine a number of uplink data streams to transmit from a mobile device;

to determine a selection of antennas from a plurality of antennas for transmitting the uplink data streams;

to determine beamforming parameters based at least in part on a beamforming identifier;

to transmit a first data stream via the selection of antennas in accordance with the beamforming parameters; and

to transmit a second data stream in response to determining that the number of uplink 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.

14. The apparatus of claim 13, in which the at least one processor is further configured to test one or more multiple-antenna hypotheses of the mobile device.

15. The apparatus of claim 13, in which the at least one processor is further configured to transmit a single data stream to a base station using a pair of antennas of the plurality of antennas responsive to determining that the number of uplink data streams is one.

16. The apparatus of claim 13, in which the at least one processor is further configured to receive the beamforming identifier from a base station.

17. The apparatus of claim 16, in which the at least one processor is further configured:

to transmit the first data stream with a first phase using a first antenna based at least in part on the beamforming identifier; and

to transmit the first data streams with a second phase using a second antenna based at least in part on the beamforming identifier.

18. The apparatus of claim 13, in which the at least one processor is further configured:

to receive from a base station a first power control message;

to receive from the base station a second power control message;

to determine a first power level for transmitting the first data stream based at least in part on the first power control message; and

to determine a second power level for transmitting the second data stream based at least in part on the second power control message.

19. The apparatus of claim 13, in which the at least one processor is further configured:

to receive from a base station a first error control message relating to the first data stream;

to receive from the base station a second error control message relating to the second data stream;

to perform a first error control process for the first uplink data stream based at least in part on the first error control message; and

to perform a second error control process for the second uplink data stream based at least in part on the second error control message.

20. An apparatus for wireless communication, the apparatus comprising:

means for determining a number of uplink data streams to transmit;

means for determining a selection of antennas from a plurality of antennas for transmitting the uplink data streams;

means for determining beamforming parameters based at least in part on a beamforming identifier;

means for transmitting a first data stream via the selection of antennas in accordance with the beamforming parameters; and

means for transmitting a second data stream in response to determining that the number of uplink 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.