Research Topics
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Towards Reliable Sample Transmission
Wireless communication is an inherently lossy technology. When targeting the communication of large data objects under real-time and safety requirements, such as in cooperative perception, lost frames have to be retransmitted in time. The Wireless Reliable Real-Time protocol (W2RP) is the first protocol that specifically addresses the reliable and timely transmission of large application data objects, called samples, in V2X environments.
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Enhanced Robustness
W2RP was further developed in multiple directions, focused on improving robustness under various scenarios and channel conditions.
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Coordination by Means of Resource Management
Due to its shared nature, the wireless channel is used by various applications of different criticalities and with different requirements and constraints. This makes timing guarantees impractical, as long as no coordination is used. A centralized application-centric Resource Management (RM) approach that is based on Software Defined Networking (SDN) principles (communication divided into control and data plane) has been developed to address the coordination of various wireless applications.
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Continuous Connectivity
Handover situations, such as present in infrastructure-supported cooperative perception use cases such as automated valet parking (AVP) or camera-equipped intersections, are especially taxing with respect to enabling reliable and timely data exchange. The mobile nature of vehicles inherently leads to the need for roaming across multiple access points (APs), as shadowing by stationary (e.g., walls, vegetation, …) and dynamic (e.g., other vehicles, …) obstacles will occur frequently, especially in case high-data rate technologies are used. This is already the case if small messages are exchanged, and becomes even more challenging if large object data streams with stringent real-time and reliability constraints are considered. Nevertheless, reliable and continuous sample exchange needs to be ensured in order to enable the corresponding use cases.
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