Low Latency Systems unter dem endlichen Blocklängen-Regime: Performance Modeling und Optimierung

 

Low-latency is one of the major concerns in the design of future wireless networks. In particular, the communication community is more and more interested in the concept of the ’tactile Internet’ and in the design of new cellular networking architectures, as will be applied in future 5G systems. The tactile Internet is expected to let cellular wireless links carry latency critical traffic as relevant for, e.g., haptic feedback in virtual and augmented reality, E-health, autonomous driving, industrial control applications and cyber physical systems. Under these low latency scenarios, the coding blocklengths of the wireless transmission are quite short. In general, it is well known that for short blocklengths decoding can fail due to noise effects as the noise process cannot be averaged out over an arbitrarily large number of coding blocks. Then, interesting questions arise: How can the performance of a wireless transmission under low latency scenarios be modeled? How can the low-latency-constrained performance be optimized? The major scope of our project is to model and optimize the system performance under the finite blocklength regime in the context of latency critical scenarios, especially in the scenarios with multiple transceiver nodes. In addition, both the physical layer performance and the link layer QoS-constrained performance are considered in the work.

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