METHOD AND APPARATUS FOR PERFORMING SPACE DIVISION MULTIPLE ACCESS IN A WIRELESS COMMUNICATION NETWORK

• US 20090023467A1
• Filed: 07/17/2008
• Published: 01/22/2009
• Est. Priority Date: 07/18/2007
• Status: Abandoned Application

• Current Assignee: Board of Regents of the University of Texas System (University of Texas System)
• Original Assignee: Board of Regents of the University of Texas System (University of Texas System)
• Inventors: HUANG, Kaibin, Heath, Robert W. JR., Andrews, Jeffrey G.
• Application Number:
  US12/175,319
• Publication Number:
  US 20090023467A1
• Time in Patent Office: Days
• US Class Current: 455/522
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04B 7/0647 Variable feedback rate
• CPC Class Codes: H04B 7/0654 at the receiver, e.g. antenna verification at mobile station

Abstract

A method and apparatus for performing space division multiple access in wireless communications are disclosed. After the receipt of a set of training data from a base station, an estimated channel state information (CSI) is then generated by a mobile station. The CSI is subsequently quantized. The mobile station then determines whether or not the quantized CSI falls within a set of thresholds. If the quantized CSI falls within the set of thresholds, the mobile then sends feedback information to the base station to allow the base station to consider the mobile station as one of the mobile station candidates available for data communications. Otherwise, if the quantized CSI falls outside the set of thresholds, the mobile station then discards the quantized CSI.

Claims

1. A mobile station comprising:

means for, in response to the receipt of training data from a base station, generating channel state information (CSI);

a quantizer for quantizing said CSI;

means for determining whether or not said quantized CSI falls within a set of thresholds; and

means for, in response to a determination that said quantized CSI falls within said set of thresholds, sending feedback information to said base station to allow said mobile station to be considered by said base station for initiating data communications with said mobile station.

2. The mobile station of claim 1, wherein said set of thresholds includes a channel power threshold and a channel shape threshold.

3. The mobile station of claim 2, wherein said means for determining further includes means for determining whether or not said quantized CSI is greater than said channel power threshold and less than said channel shape threshold.

4. The mobile station of claim 1, wherein said mobile station further includes means for, in response to a determination that said quantized CSI falls outside said set of thresholds, discarding said quantized CSI.

5. A method for performing space division multiple access in a wireless communication network, said method comprising:

in response to the receipt of training data from a base station, generating channel state information (CSI);

quantizing said CSI;

determining whether or not said quantized CSI falls within a set of thresholds; and

in response to a determination that said quantized CSI falls within said set of thresholds, sending feedback information to said base station to allow said mobile station to be considered by said base station for initiating data communication with said mobile station.

6. The method of claim 5, wherein said set of thresholds includes a channel power threshold and a channel shape threshold.

7. The method of claim 6, wherein said determining further includes determining whether or not said quantized CSI is greater than said channel power threshold and less than said channel shape threshold.

8. The method of claim 5, wherein said method further includes in response to a determination that said quantized CSI falls outside said set of thresholds, discarding said quantized CSI.

9. A base station comprising:

means for sending a set of training data to a plurality of mobile stations;

in response to the receipt of feedback information from one or more of said mobile stations, adding said one or more mobile stations to a selection pool, wherein said feedback information is formulated by said one or more mobile stations based on said set of training data; and

selecting a subset of said one or more mobile stations for receiving data.

10. The base station of claim 9, wherein said one or more mobile stations send said feedback information to said base station when a set of quantized CSI is greater than a channel power threshold and less than a channel shape threshold, wherein said set of quantized CSI is generated based on said set of training data.