Activate Automatic MCS Upgrade [actMcsUpgrade] for LTE throughput Improvement

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Activates downlink MCS Upgrade functionality for non-GBR transmissions and specifies if the upgrades can increase the MCS index by one or two. The purpose of this function is to improve over the air spectral efficiency. Full RBG allocations (RAT0) are used for DL scheduling. This leads to spectrally inefficient allocations when a partial RBG is needed to drain a UE's buffer. 

For example in a 20 MHz system if 5 PRBs are required to drain a UE's buffer, an allocation of two RBGs is required, i.e. 8 PRBs. If MCS Upgrade is enabled, an MCS upgrade will be used so that an allocation of one full RBG (4 PRBs) can be used to drain the UE's buffer. MCS upgrades are only used to reduce a 3 RBG allocation to 2 RBGs or to reduce a 2 RBG allocation to 1 RBG
actMcsUpgrade[Activate MCS upgrade]   

For Nokia OEM Paramter name is actMcsUpgrade which has different values as below 

0: Disabled

1: SingleMcsIndexUpgradeOnly 

2: SingleOrDoubleMcsIndexUpgrade

Above Pre-Post snap is one of cluster where we did trails in one of Indian Metro Mumbai and result was very much encouraging 

Below wer Impact 

Overall- Traffic increased 

MCSupgrade counters started pegging – 689 Mn. attempt

Overall, cells <2Mbps reduced by ~7%  due to gain in DL throughput.

Rest all KPI’s and CCs inline.



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