Minimum duration outage of wireless Rayleigh-fading links using selection combining

Abstract

Resilience is a major cornerstone in the development of next generation wireless networks. Important aspects of resilience are the availability and survivability of wireless connections. In order to characterize these properties, we present elementary models for Rayleigh-fading links. An important part of the survivability model is an approximation of the fade duration distribution by an exponential distribution. We utilize this approximation to derive the minimum duration outage of multiple selection combined links, a performance metric for survivability which also captures the channel correlation of time-varying channels. Since the findings are given in closed form, they are much simpler than existing expressions containing infinite series and Bessel functions. Finally, numerical evaluation confirms the accuracy of the approximation and the expressions derived.

Wireless Backhaul: Performance Modeling and Impact on User Association for 5G

“…For a special case in which α = 2, a closed form solution for (14) can be obtained using [21, eq. B.27], as shown in (15). Considering a timeslotted transmission over wireless BH links, let θ be the timeslot duration corresponding to given wireless technology.…”

“…There are several performance metrics that may be used to characterise the resilience of a link [15]. (i) Reliability is the probability of a link being operational and is measured as the mean time before failure (MTBF).…”

“…However, the mean packet delay is approximated by using the mean value of the link distance, instead of capturing the actual distribution of the variable distance. The availability and survivability of wireless connections are studied and modelled in [15] but do not capture the presence of dominant LOS.…”

Modular Approach for Modelling the Hybrid Multi-Hop Backhaul Performance

“…Coverage DRAFT February 10, 2017 and throughput derivations in a wireless cellular network are elaborated in [6] and used to develop a general and tractable framework for modelling and analysing joint radio access resource partitioning and offloading in a two-tier cellular network. Outage probability of multilink wireless backhaul connections is studied in [7] and an analytical model is proposed that accounts for re-transmissions and selection combining. …”

Case Study on Using the User-Centric-Backhaul Scheme to Unlock the Realistic Backhaul

“…There are several works that tackle the intelligent user-cellbackhaul association problem (e.g., [5], [6]). Others works propose analytical models for the backhaul or end-to-end network performance modelling (e.g., [7], [8]). However, to the best of our knowledge, this is the first work that proposes an end-to-end methodology that measures the gap, generates rectification solutions, ranks their corresponding cost-effectiveness, which is then validated in simulations.…”