• IP address continuity: When a user moves to another sub-network, the application will not observe the change of the IP address.
• Session continuity: It is a combination of IP address continuity and service context migration. Service context migration occurs when a user moves to a new location and the service context used by the function in the previous location should be able to be migrated and used by the same function at the new location.
• Content continuity: Refers to migration and delivery of the requested content from a location close to the mobile user. The requested content can be migrated and delivered from a location close to a mobile user.
• Storage continuity: Storage should be able to migrate to a new location close to the mobile user.
• Function continuity: The same function in a new location can be run using context used by the same function in the previous location.
It needs to be supported in order to maintain function continuity.