Improving QoE for Skype Video Call in Mobile Broadband Network
In this paper, the authors introduce an app-radio cross-layer framework for improving Quality of user Experience (QoE) of Over-The-Top (OTT) Internet applications in Mobile Broadband Networks, e.g. WiMAX, 3G, LTE, etc. They apply methods similar to the well-known network layer techniques: Explicit Congestion Notification (ECN) and Differentiated Services (DiffServ) to application layer and wireless link layer. They focus on UDP based delay-sensitive real-time video call applications such as Skype, and propose to exchange cross-layer information, e.g. congestion, packet priority, etc., through API (application programming interface) based control signals instead of the existing ECN and DiffServ fields in IP data packet header.