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US 9,432,162 B2Granted
Methods and systems for scheduling a virtual MIMO communication environment
AssigneeBlackBerry Limited
InventorsJianming Wu, Ming Jia, Wen Tong, Peiying Zhu
Life of this patent
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Abstract
A system and method for scheduling cooperative uplink transmissions in a virtual multiple input multiple output (MIMO) wireless communication environment are provided. More specifically, both random and channel aware orthogonal scheduling techniques for identifying a sub-set of N mobile terminals to provide cooperative uplink transmissions for each transmit time interval are provided.
Claims25
An apparatus for scheduling uplink transmissions comprising:
- at least one network interface;
- and
- a control system associated with the at least one network interface and configured to:
- determine at least one channel transfer function for a plurality of sub-carriers for each of a plurality of mobile terminals served by a base station;
- identify a select group of mobile terminals from the plurality of mobile terminals for cooperative uplink transmission with one another, wherein the select group of mobile terminals are identified based on orthogonality of the channel transfer functions;
- assign at least one sub-channel comprising one or more of the plurality of sub-carriers to the select group of mobile terminals to be simultaneously used by each mobile terminal in the select group of mobile terminals;
- and
- schedule at least one mobile terminal from the plurality of mobile terminals for a single input multiple output (SIMO) transmission rather than cooperative uplink transmission,
- wherein the select group of mobile terminals are scheduled for cooperative uplink transmission based on determining that the select group of mobile terminals comprise mobile terminals having channel transfer functions that are orthogonal to each other, and wherein the at least one mobile terminal is scheduled for the SIMO transmission based on determining that a channel quality associated with the at least one mobile terminal is below a predetermined threshold.
6 more elements
A method for scheduling uplink transmissions, the method comprising:
- determining at least one channel transfer function for a plurality of sub-carriers for each of a plurality of mobile terminals served by a base station;
- identifying a select group of mobile terminals from the plurality of mobile terminals for cooperative uplink transmission with one another, wherein the select group of mobile terminals are identified based on orthogonality of the channel transfer functions;
- assigning at least one sub-channel comprising one or more of the plurality of sub-carriers to the select group of mobile terminals to be simultaneously used by each mobile terminal in the select group of mobile terminals;
- and
- scheduling at least one mobile terminal from the plurality of mobile terminals for a single input multiple output (SIMO) transmission rather than cooperative uplink transmission,
- wherein the select group of mobile terminals are scheduled for cooperative uplink transmission based on determining that the select group of mobile terminals comprise mobile terminals having channel transfer functions that are orthogonal to each other, and wherein the at least one mobile terminal is scheduled for the SIMO transmission based on determining that a channel quality associated with the at least one mobile terminal is below a predetermined threshold.
3 more elements
Dependencies are inferred from the claim text.