In this video, we explore the concept of Wireless Access in Ultra Reliable Low Latency Communication (URLLC). URLLC aims to enable secure and real-time interactions between wirelessly connected devices, including humans, machines, and robots, with extremely low latency and high reliability.
To achieve this, we delve into the communication theoretic principles underlying URLLC. We begin with a simple link model to establish the fundamental relationship between transmitted and received signals, noise, interference, and user activity. From there, we examine latency-reliability characteristics to assess system performance and identify areas for improvement.
Moving beyond the link model, we delve into Shannon’s one-way communication model. This model enables us to explore the intrinsic trade-offs between latency, data size, bandwidth, energy expenditure, and reliability. By understanding these trade-offs, we can optimize system design to meet the stringent requirements of URLLC.
Finally, we acknowledge the importance of protocol information in ensuring reliable communication. We extend Shannon’s model to incorporate two-way communication, as URLLC typically involves acknowledgment messages from receivers. By considering both control and data transmissions, we can comprehensively assess the impact of protocol steps on latency and reliability.