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Through successive technological innovation, mobile networks have been able to cope with traffic growth and the changing nature of services. However, there is still a gap between the possible transformation in terms of performance and efficiency, and the emerging new service requirements. This paper presents the ongoing mobile network evolution towards 5G, with a focus on the emerging network slicing...
This paper proposes a highly simplistic 5G core network design. Instead of providing mobility support and Quality-of-Service for all traffic as in the 4G core network EPC, the default service of 5G should be connectionless, best effort and without support for node mobility. This is based on the observation that applications like video streaming or web surfing that create the bulk of the traffic in...
Providing smooth Handover (HO) for video applications over wireless networks is often difficult due to the different amount of available resources from cell to cell. In this paper, we propose a QoE-based scheme that statically or dynamically reserves resources in order to maintain unperceivable quality fluctuation during HO for video delivery in LTE mobile networks. Through simulations, we show that...
We address a multi-criteria Quality of Experience (QoE) driven optimization problem for multi-user wireless video delivery. The optimization is done in a cross-layer fashion by using parameterized models of application and link layer in order to determine the application data rate and the network resources that fulfill the criteria. Mean Opinion Score (MOS) is used as a unified utility metric that...
The increasing popularity of user-generated content and the high quality upstreaming capabilities of mobile phones indicate a prevalence of video traffic in the uplink of next generation mobile networks. Need arises for optimizing the network resource allocation while preserving the user satisfaction. In this paper, we propose a service-centric approach for uplink distribution of real-time user-generated...
This paper proposes a novel approach for Quality of Experience (QoE) driven cross-layer optimization for wireless video transmission. We formulate the cross-layer optimization problem with a constraint on the temporal fluctuation of the video quality. Our objective is to minimize the temporal change of the video quality as perceivable quality fluctuations negatively affect the overall quality of experience...
In this paper, we apply a Quality of Experience (QoE) based Cross-Layer Optimization (CLO) framework for efficiently allocating the network resources for video delivery in LTE mobile networks. Conventionally, the objective function aims to maximize the average user-perceived quality of all users by jointly optimizing the application layer and the lower layers of the radio communication system. We...
Thanks to its in-network drop-based adaptation capabilities, H.264 Scalable Video Coding is perceived as an effective approach for delivering video over networks characterized by sudden large bandwidth fluctuations, such as Wireless LANs. Performance may be boosted by the adoption of application-aware/cross-layer schedulers devised to intelligently drop video data units (NALUs), so that i) decoding...
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