期刊
IEEE COMMUNICATIONS LETTERS
卷 22, 期 11, 页码 2350-2353出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LCOMM.2018.2868956
关键词
5G; availability; mean time to first failure; reliability; URLLC
资金
- Federal Ministry of Education and Research of the Federal Republic of Germany (BMBF) within the initiative Region Zwanzig20 under Project Fast Automation [03ZZ0510F]
Achieving connectivity reliability for ultra-reliable low-latency communication (URLLC) is one major challenge for future wireless communications systems. The current understanding of reliability does not sufficiently cover time-related aspects, e.g., time-varying channels or the duration of a certain condition in a wireless system. Moreover, different applications require diverse execution periods during which no failure is allowed, which we denote as mission duration. In this letter, we focus on time-related aspects and introduce the performance metric mission reliability to wireless communications systems and employ its connection to the mean tune to first failure, reflecting the expected time until the first failure occurs. As diversity is accepted to be essential for reliability, their evaluation is presented regarding a multi-connectivity system with Rayleigh fading, reflecting frequency diversity. We demonstrate the trade-off between mission duration, mission reliability, and the number of links used for multi-connectivity, which can stimulate the discussion on URLLC and advance the design of future wireless systems.
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