Availability indication as key enabler for ultra-reliable communication in 5G

Abstract

Due to its flexibility, cost-efficiency, and the ability to support mobility, wireless connectivity is seen today as a key enabler for a wide range of applications beyond classical mobile communications. A significant part of these applications depends on the capability of the wireless communication system to provide reliable connectivity. However, due to the randomness of the wireless propagation channel, reliability is still a critical issue in these systems. Some applications, such as vehicular and industrial applications, demand a level of reliability that wireless communication systems typically are not able to guarantee. This paper provides a framework that enables these applications to make use of wireless connectivity only if the transmission conditions are favorable enough. The concept is based on the idea that -despite the fact that it is practically impossible to ensure error-free wireless communication -it is feasible to derive boundary conditions for the transmission success. To this end, the paper introduces a novel metric for UltraReliable Communication (URC) referred to as "Availability", that determines the expected presence or absence of link reliability at the time of transmission. The availability is signaled by means of an Availability Indicator (AI) to the applications. Moreover, we develop the system model for computing the AI and illustrate the potential benefits of the new reliability metric by means of a possible implementation for automotive scenarios.

5G-Enabled Tactile Internet

“…This becomes clear, with applications addressed in Section II requiring a reliable reception of rapidly transmitted data. A failure rate even below 10 −7 might be necessary in some 5G applications [24], [25]. This corresponds to merely 3.17 seconds of outage per year.…”

Ultra-Reliable Link Adaptation for Downlink MISO Transmission in 5G Cellular Networks

“…Identified sources of unreliability include resource depletion and interference. In [11], an availability indicator parameter is introduced as a key enabler for ultra-reliability in 5G, where availability is defined in terms of absence or presence of link reliability at the time of transmission.…”

Analysis of transmission methods for ultra-reliable communications

“…If this condition is hold, a tighter BLER value should be set for the data transmissions leading to equation (7). The average number of required resources can also be calculated according to equation (8). Fig.…”

“…Several solutions are offered for adapting running applications to the URC operation. Availability indication is considered as an indicator for applications to assess the availability of URC operation over the link [8]. In order to offer URC in various conditions, reliable service compositions are considered to offer different versions of URC for users [2].…”