Dynamic indication of higher order modulation and coding scheme table
AssigneeAT&T Intellectual Property I, L.P.
InventorsSaiRamesh Nammi, Arunabha Ghosh
Life of this patent
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Abstract
The described technology is generally directed towards dynamically changing which quadrature amplitude modulation (QAM) table a user equipment is to use based on channel quality information. A network schedules a user equipment with 256 QAM modulation if the user equipment recommends 256 QAM in the CQI report (and the scheduler decides to use 256 QAM for that particular user equipment). The network indicates to the user equipment that it has to use 256 QAM modulation and coding scheme (MCS) table and not the configured QAM MCS table while determining the scheduling parameters by decoding PDCCH.
Claims20
A method, comprising:
- receiving, by a network device comprising a processor, channel quality indicator data from a user equipment;
- based on the channel quality indicator data, determining, by the network device, that the user equipment is to use an updated modulation and coding scheme data structure having a higher order than a current order of a previously configured modulation and coding scheme data structure used by the user equipment;
- and
- indicating, to the user equipment by the network device via a second downlink control channel that is separate from a first downlink control channel that carries scheduling information to the user equipment, that the user equipment is to use the updated modulation and coding scheme data structure, wherein the second downlink control channel does not carry any scheduling information to the user equipment.
A network device, comprising:
- a processor;
- and
- a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, the operations comprising:
- receiving channel quality indicator data from a user equipment;
- based on the channel quality indicator data, determining that the user equipment is to use a higher order modulation and coding scheme data structure than a current order of a currently used modulation and coding scheme data structure;
- and
- indicating, to the user equipment via a second downlink control channel that is separate from a first downlink control channel that carries scheduling information to the user equipment, that the user equipment is to use the higher order modulation and coding scheme data structure, wherein the second downlink control channel does not carry any scheduling information to the user equipment.
A non-transitory machine-readable storage medium, comprising executable instructions that, when executed by a processor of a network device, facilitate performance of operations, the operations comprising:
- configuring a user equipment to use a low order quadrature amplitude modulation and coding scheme table that is of a lower order than a high order quadrature amplitude modulation and coding scheme table;
- receiving channel quality indicator data from the user equipment;
- based at least in part on the channel quality indicator data, determining that the user equipment is to use the high order quadrature amplitude modulation and coding scheme table for a physical downlink shared channel transmission;
- and
- indicating, to the user equipment via a second downlink control channel that is separate from a first downlink control channel that carries scheduling information to the user equipment, that the user equipment is to use the high order quadrature amplitude modulation and coding scheme table for the physical downlink shared channel transmission, wherein the second downlink control channel does not carry any scheduling information to the user equipment.
Dependencies are inferred from the claim text.