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Quality-aware vertical handover


We provide our customers with valuable scientific data and solutions for smart mobility management and network load optimisation. Our consultants have more than 15 years of experience in managing wireless networks and mobility, including communications protocols, algorithms, handover and routing techniques. Efficient mobility and handover management is important for boosting both performance and user-friendliness. The objective is, above all, to increase the performance of wireless networks and the quality of the service as perceived by the user.

We have developed solutions for situations such as smart handovers and vertical handovers. Our solutions can be used in next-generation (5G) telecommunications solutions to improve network interoperability and load distribution, for example.

Smart mobility management and vertical handovers

Distributing traffic loads between different kinds of networks is one of the core functionalities of smart mobility management. This requires being able to transfer users seamlessly from one network technology to another. The radio technologies used in different networks can vary considerably.

Handover can be based on several different factors such as the requirements specific to the application or the user, the location of the user or issues such as network capacity or status. In addition to handovers, users' data can also be transferred across multiple networks simultaneously. Handovers that are based purely on decreasing the load on a specific network are referred to as off-loading.  

Several different factors contribute to decisions to switch between telecommunications network hotspots or to use multiple different networks simultaneously, and the decision-making process often involves complex event processing. VTT develops decision-making techniques that involve monitoring several different parameters relating to networks, services and data terminal equipment. 

Network status monitoring and decision-making

VTT has developed several tools for monitoring network status which can be used to support decision-making. Among the most advanced tools are Qosmet and Moset. The tools can be used to reliably measure parameters relating to the quality of the network service in real time, which allows the measurements to be used in decision-making. 

VTT has also developed signalling methods that enable decentralised decision-making. Decentralised decision-making takes account of the status of the data terminal equipment, the network and services, and decisions are made on the basis of certain rules and whatever needs to be prioritised at any given time. Common decision-making techniques include algorithms based on fuzzy logic and solutions based on artificial neural networks or machine learning, for example. 

Application-level adaptations – adaptive video streaming

VTT's research in this field focuses on adaptive video streaming technologies that allow video traffic to be adapted according to the available wireless network capacity, for example. Smart handovers also take account of video coding methods and adaptive video streaming technologies so that the user gets the best possible quality while factoring in network loading.

We develop and optimise high-efficiency video coding techniques such as HEVC/H.265 as well as adaptive streaming techniques such as MPEG-DASH.  HEVC video coding combined with MPEG-DASH streaming helps service providers to ensure a high-quality experience for all users.

Watch the video of our end-to-end management of mobile video QoE: