In order to meet the user requirements in the next generation radio access technology, the ongoing standardization within 3rd Generation Partnership Project (3GPP) offers flexibility in terms of employing mixed numerology.
I have read many papers about it, such that: This link.
I think it's a new technique but it's difficult for me to understand it well. It's like to use different carrier spacing instead of one fixed of 15 KHz in LTE, but that's not sure.
Could you please explain what is that mean in an easy way, and what's the benefit of it?