Application and Service Layer Intelligence

T5.3 Application Layer Intelligence (M7 – M18) Task Leader: LU Participants: BT, BLB, BPK, EBU, EXP, LU, NOM, O2M One way to achieve convergence is to implement as much service logic as possible at the endpoints of a connection, including in the service layer, outside of the individual network operators’ domains. Indeed, one of the principles of the 5G-Xcast approach is that any requirement which can be satisfied with application- or service-level logic, without support from the network, will be. The purpose of this task is to describe how solutions to common problems can be solved without explicit network support, either purely at the application or service layer, or at least, as end-point only solutions. One common requirement is for seamless session handover between different network types. This task will consider various ways to achieve this, particularly for video streaming, using application or service-level logic, including multilink approaches and intelligent application logic. This work will also consider application and service level to help control the end user QoE. Again, some of the key technologies described earlier in this WP will have a role to play, including multilink but also some other approaches, such as more flexible coordination between the application and the transport protocol behaviour. The output from this task will be a document describing how these requirements can be met with application and service layer intelligence.