The EDSG service replacement and restoration mechanism applies to services in a service group. This mechanism can be used to dynamically increase the bandwidth for a service flow. After a high-bandwidth service is deactivated or its quota is exhausted, the initial-bandwidth service is automatically restored.
As shown in Figure 1, if a user's service A has been activated and service B in the same service group needs to be activated, service A is automatically deactivated before service B is activated. That is, service B replaces service A.
As shown in Figure 2, if service B is deactivated, service A is automatically activated.