Dynamic wake steering and its impact on wind farm power production and yaw actuator duty

Wake redirection is a wind farm control strategy that aims at increasing the overall power yield of a wind farm. It involves intentional misalignment of the rotors of upstream wind turbines with respect to the wind direction, thereby diverting their wakes aside from downstream turbines. The yaw misalignment angles are typically optimized using...

Adaptive camouflage of moving targets

Targets that are well camouflaged under static conditions are often easily detected as soon as they start moving. We investigated and evaluated ways to design camouflage that dynamically adapts to the background and conceals the target while taking the variation in potential viewing directions into account. In a human observer experiment...

Enabling Superior and Controllable Video Streaming QoE with 5G Network Orchestration

5G promises to offer a single network platform that can be optimized for several vertical industries and applications. It is envisioned that this optimization will be achieved through advanced network orchestration functionalities. Video streaming accounts for the vast majority of mobile traffic, hence optimizing performance and Quality of...

360-degree video streaming with MPEG-DASH

Virtual reality (VR) has gained a lot of attention due to market availability of consumer devices. A challenge for wider use is the ability to stream VR content to the user. This paper looks at aspects of 360° video streaming and the considerations for possible solutions. The primary focus lies on current efforts to develop standards for...

Self-Optimisation of Vertical Sectorisation in a Realistic LTE Network

Vertical Sectorisation (VS) is a feature that exploits the capabilities of Active Antenna Systems (AAS) to improve service performance and network capacity, by splitting a single cell into an inner and outer sector. The attained gains primarily depend on the suitable and timely (de)activation of VS in response to the observed/estimated traffic...

On the impact of redirection on HTTP adaptive streaming services in federated CDNs

HTTP Adaptive Streaming (HAS) refers to a set of novel streaming services that allow clients to adapt video quality based on current network conditions. Their use of existing HTTP delivery infrastructure makes them perfectly suited for deployment on existing Content Delivery Networks (CDNs). Nevertheless, this leads to some new challenges,...