This section describes the basic concepts of EDSG and the relationships between EDSG elements.
A service group identifies a type of specific data traffic. It is used as a source or destination in a traffic rule and is referenced in an access control list (ACL).
Each EDSG service policy contains rate limit and statistics at the forwarding layer, and authentication, accounting, and prepaid quota management at the service layer.
Each EDSG service is mapped to one service flow, and multiple EDSG services can be loaded for a user.