Systems and methods to coordinate transmissions in distributed wireless systems via user clustering
First Claim
1. A method implemented within a multiuser (MU) multiple antenna system (MU-MAS) comprising:
- measuring link quality between a target user and a plurality of MU-MAS distributed antennas of base transceiver stations (BTSs);
using the link quality measurements to define a user cluster;
measuring channel state information (CSI) between each user and each MU-MAS antenna within a defined user cluster; and
precoding data transmissions between the MU-MAS antennas within the user cluster and the users reachable by those MU-MAS antennas based on the measured CSI.
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Abstract
Systems and methods are described for coordinating transmissions in distributed wireless systems via user clustering. For example, a method according to one embodiment of the invention comprises: measuring link quality between a target user and a plurality of distributed-input distributed-output (DIDO) distributed antennas of base transceiver stations (BTSs); using the link quality measurements to define a user cluster; measuring channel state information (CSI) between each user and each DIDO antenna within a defined user cluster; and precoding data transmissions between each DIDO antenna and each user within the user cluster based on the measured CSI.
126 Citations
34 Claims
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1. A method implemented within a multiuser (MU) multiple antenna system (MU-MAS) comprising:
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measuring link quality between a target user and a plurality of MU-MAS distributed antennas of base transceiver stations (BTSs); using the link quality measurements to define a user cluster; measuring channel state information (CSI) between each user and each MU-MAS antenna within a defined user cluster; and precoding data transmissions between the MU-MAS antennas within the user cluster and the users reachable by those MU-MAS antennas based on the measured CSI. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A system for coordinating transmissions in a MU-MAS comprising:
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a plurality of wireless users; a plurality of base transceiver stations (BTSs) having a plurality of MU-MAS antennas for establishing multiple concurrent communication channels with the plurality of users; wherein either the BTSs and/or the wireless users measure link quality of the communication channels therebetween and use the link quality measurements to define a user cluster; the BTSs and/or the wireless users further measuring channel state information (CSI) between each user and each MU-MAS antenna within a defined user cluster and precoding data transmissions between the MU-MAS antennas within the user cluster and the users reachable by those MU-MAS antennas based on the measured CSI. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification