W1 interface; Layer 1
The present document specifies the standards allowed to implement Layer 1 on the W1 interface. The W1 interface provides means for interconnecting an ng-eNB-CU and an ng-eNB-DU of an ng-eNB within NG-RAN.
The specification of transmission delay requirements and O&M requirements are not in the scope of the present document.
In the following 'Layer 1' and 'Physical Layer' are assumed to be synonymous.