Uplink user equipment selection
First Claim
1. A network system comprising:
- a plurality of receive antenna elements of one or more serving nodes; and
a scheduler in communication with the plurality of receive antenna elements, the scheduler comprising a processor and computer-executable instructions, wherein the computer-executable instructions, when executed by the processor, cause the scheduler to;
obtain uplink channel information for channels between the plurality of receive antenna elements and a plurality of transmit antenna elements associated with a plurality of user equipment (UEs);
determine, for each transmit antenna element in the plurality, a channel strength based on the uplink channel information;
order the plurality of transmit antenna elements based on the determined channel strengths; and
in order from highest-ordered transmit antenna element to lowest-ordered transmit antenna element, select the respective transmit antenna element to communicate with one or more of the plurality of receive antenna elements during a first time slot in response to a determination that;
a measurement that represents a spatial orthogonality between the respective transmit antenna element and one or more spatial elements of one or more other transmit antenna elements in the plurality selected to communicate with one or more of the plurality of receive antenna elements is greater than a threshold value, anda number of spatial dimensions provided by one or more transmit antenna elements in the plurality selected to communicate with one or more of the plurality of receive antenna elements does not exceed a number of receive antenna elements in the plurality of receive antenna elements.
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Accused Products
Abstract
Aspects of the disclosure relate to a selection scheme implemented by a scheduler in a multiple-input multiple-output (MIMO) network to identify which users to schedule simultaneously during the same time slot. For uplink communications and a particular frequency wholeband or sub-band, the scheduler can obtain uplink channel information for channels between base stations and UEs. The scheduler can then determine a strength of the channels using the uplink channel information, order the UEs using a fairness metric based on the channel strengths, and compute one or more QR decompositions to identify whether a spatial dimension of a UE is roughly or approximately orthogonal to spatial dimension(s) of other UEs selected to be served during a time slot being scheduled. If the spatial dimensions are roughly or approximately orthogonal, the scheduler selects the UE to be served at the same time as other UEs already selected.
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Citations
20 Claims
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1. A network system comprising:
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a plurality of receive antenna elements of one or more serving nodes; and a scheduler in communication with the plurality of receive antenna elements, the scheduler comprising a processor and computer-executable instructions, wherein the computer-executable instructions, when executed by the processor, cause the scheduler to; obtain uplink channel information for channels between the plurality of receive antenna elements and a plurality of transmit antenna elements associated with a plurality of user equipment (UEs); determine, for each transmit antenna element in the plurality, a channel strength based on the uplink channel information; order the plurality of transmit antenna elements based on the determined channel strengths; and in order from highest-ordered transmit antenna element to lowest-ordered transmit antenna element, select the respective transmit antenna element to communicate with one or more of the plurality of receive antenna elements during a first time slot in response to a determination that; a measurement that represents a spatial orthogonality between the respective transmit antenna element and one or more spatial elements of one or more other transmit antenna elements in the plurality selected to communicate with one or more of the plurality of receive antenna elements is greater than a threshold value, and a number of spatial dimensions provided by one or more transmit antenna elements in the plurality selected to communicate with one or more of the plurality of receive antenna elements does not exceed a number of receive antenna elements in the plurality of receive antenna elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A computer-implemented method comprising:
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obtaining uplink channel information for channels between the plurality of receive antenna elements and a plurality of transmit antenna elements associated with a plurality of user equipment (UEs); determining, for each transmit antenna element in the plurality, a channel strength based on the uplink channel information; ordering the plurality of transmit antenna elements based on the determined channel strengths; and in order from highest-ordered transmit antenna element to lowest-ordered transmit antenna element, selecting the respective transmit antenna element to communicate with one or more of the plurality of receive antenna elements during a first time slot in response to a determination that a measurement that represents a spatial orthogonality between the respective transmit antenna element and one or more spatial elements of one or more other transmit antenna elements in the plurality selected to communicate with one or more of the plurality of receive antenna elements is greater than a threshold value. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. Non-transitory, computer-readable storage media comprising computer-executable instructions, wherein the computer-executable instructions, when executed by a scheduler in a baseband unit, cause the baseband unit to:
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obtain uplink channel information for channels between the plurality of receive antenna elements and a plurality of transmit antenna elements associated with a plurality of user equipment (UEs); determine, for each transmit antenna element in the plurality, a channel strength based on the uplink channel information; order the plurality of transmit antenna elements based on the determined channel strengths; and in order from highest-ordered transmit antenna element to lowest-ordered transmit antenna element, select the respective transmit antenna element to communicate with one or more of the plurality of receive antenna elements during a first time slot in response to a determination that a measurement that represents a spatial orthogonality between the respective transmit antenna element and one or more spatial elements of one or more other transmit antenna elements in the plurality selected to communicate with one or more of the plurality of receive antenna elements satisfies a threshold value.
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Specification