US 10,873,939 B2 · Selecting a modulation and coding scheme and a transmit block size in long term evolution

Abstract

A base station for selecting a modulation and coding scheme (MCS) and a total block size (TBS) for a UE is provided. The base station includes a processor and memory storing instructions. The instructions are executable to map a nominal MCS to a TBS index and determine a nominal TBS per resource block value based on the TBS index. The instructions are also executable to determine a target TBS based on the nominal TBS per resource block value and a number of resource blocks allocated to the UE. The instructions are also executable to determine a customized TBS, from a plurality of predefined TBSs, that is closest to the target TBS. The instructions are also executable to map the customized TBS to a customized MCS. The instructions are also executable to use the customized TBS and the customized MCS to transmit to the UE during a downlink transmission time interval.

Claims20

Dependent claims

A base station for selecting a modulation and coding scheme (MCS) and a total block size (TBS) for a user equipment (UE), comprising:

a processor;
memory in electronic communication with the processor;
and
instructions stored in the memory, the instructions being executable to:
map a nominal modulation and coding scheme (MCS) to a total block size (TBS) index;
determine a nominal TBS per resource block value based on the TBS index;
determine a target TBS by scaling the nominal TBS per resource block value based on at least a number of symbols in a downlink transmission time interval (TTI), an actual CFI used for the downlink TTI, and an actual number of physical data shared channel (PDSCH) reference symbols per resource block, and a number of resource blocks allocated to the UE;
determine a customized TBS, from a plurality of predefined TBSs, that is closest to the target TBS;
map the customized TBS to a customized MCS;
and
use the customized TBS and the customized MCS to transmit to the UE during the downlink TTI.

8 more elements

A method for selecting a modulation and coding scheme (MCS) and a total block size (TBS) for a user equipment (UE), wherein the method is performed by a base station, the method comprising:

mapping a nominal modulation and coding scheme (MCS) to a total block size (TB S) index;
determining a nominal TBS per resource block value based on the TBS index;
determining a target TBS by scaling the nominal TBS per resource block value based on at least a number of symbols in a downlink transmission time interval (TTI), an actual CFI used for the downlink TTI, and an actual number of physical data shared channel (PDSCH) reference symbols per resource block, and a number of resource blocks allocated to the UE;
determining a customized TBS, from a plurality of predefined TBSs, that is closest to the target TBS;
mapping the customized TBS to a customized MCS;
and
using the customized TBS and the customized MCS to transmit to the UE during the downlink TTI.

4 more elements

Dependencies are inferred from the claim text.

Selecting a modulation and coding scheme and a transmit block size in long term evolution

Life of this patent

Selecting a modulation and coding scheme and a transmit block size in long term evolution

Life of this patent

Abstract

Claims20