What is the minimum requirement for transmission bandwidth to deploy DSS in AWS with 20MHz?

Hi dear experts.
What is the minimum requirement for transmission bandwidth to deploy DSS in AWS with 20 MHz?

DSS in Ericsson Called ESS.
It will depend on RU Connection rule.
2.5G, 9.8G, 10G…

Thank you so much.
However, don’t you think it is too much?