Scheduling in a cellular communication system using a large excess number of base station antennas
AssigneeAvago Technologies General IP (Singapore) Pte. Ltd.
InventorsNihar Jindal, Murat Mese, Arogyaswami Paulraj
Life of this patent
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Abstract
The present disclosure is directed to a system and method for selecting a sub-group of user terminals (UTs) among a group of UTs served by a sector of a cellular network to schedule independent data streams for transmission to over the same time-frequency interval. In one embodiment, the sub-group of UTs is selected to limit inter-user interference among the sub-group of UTs. In another embodiment, the sub-group of UTs is selected to limit inter-user interference experienced by a UT that is at or near the boundary of the sector that serves the sub-group of UTs.
Claims20
A method, comprising:
- selecting a subgroup of user terminals (UTs) from among a group of UTs served by a sector;
- scheduling, for each UT in the subgroup of UTs, a different data stream for transmission over a same time-frequency interval;
- and
- precoding the different data streams to produce precoded data streams for transmission over the same time-frequency interval by a plurality of antennas, wherein the plurality of antennas comprise excess antennas determined based on the number of precoded data streams,
- wherein selecting the subgroup of UTs further comprises selecting the subgroup of UTs based on a location of at least two UTs in the group of UTs and the number of excess antennas.
A method, comprising:
- selecting a subgroup of user terminals (UTs) from among a group of UTs served by a sector;
- scheduling, for each UT in the subgroup of UTs, a different data stream for transmission over a same time-frequency interval;
- precoding the different data streams to produce precoded data streams for transmission over the same time-frequency interval by a plurality of antennas, wherein the plurality of antennas comprise excess number of antennas determined based on the number of precoded data streams;
- and
- adjusting a beam width associated with one of the precoded data streams by increasing or decreasing the excess number of antennas used to transmit the one of the precoded data streams.
A system, comprising:
- a scheduler, stored on a memory and executed by a processor, configured to schedule, for each UT in a subgroup of UTs, a different data stream for transmission over a same time-frequency interval;
- and
- a precoder circuit configured to receive the different data streams from the scheduler and precode the different data streams to produce recoded data streams for transmission over the same time-frequency interval by a plurality of antennas, wherein the plurality of antennas comprise excess antennas determined based on the number of precoded data streams,
- wherein the scheduler is configured to select the subgroup of UTs from among a group of UTs based on a location of at least two UTs in the group of UTs and the number of excess antennas.
Dependencies are inferred from the claim text.