Performance evaluation of LIBTA/hybrid time-slot selection algorithm for cellular systems

2001 ◽  
Vol 14 (6) ◽  
pp. 575-591 ◽  
Author(s):  
Jyh-Horng Wen ◽  
Wen-Jiang Chen ◽  
Shang-Yo Lin ◽  
Kuo-Ting Huang
Keyword(s):  
Performance Evaluation ◽  
Time Slot ◽  
Cellular Systems ◽  
Selection Algorithm

scholarly journals Dynamic Lognormal Shadowing Framework for the Performance Evaluation of Next Generation Cellular Systems

2019 ◽  
Vol 11 (5) ◽  
pp. 106
Author(s):  
Georgios A. Karagiannis ◽  
Athanasios D. Panagopoulos
Keyword(s):  
Performance Evaluation ◽  
Large Scale ◽  
Channel Model ◽  
Temporal Dynamics ◽  
Future Internet ◽  
Point Of View ◽  
Cellular Systems ◽  
Internet Applications ◽  
Spatial Correlation Structure ◽  
Lognormal Shadowing

Performance evaluation tools for wireless cellular systems are very important for the establishment and testing of future internet applications. As the complexity of wireless networks keeps growing, wireless connectivity becomes the most critical requirement in a variety of applications (considered also complex and unfavorable from propagation point of view environments and paradigms). Nowadays, with the upcoming 5G cellular networks the development of realistic and more accurate channel model frameworks has become more important since new frequency bands are used and new architectures are employed. Large scale fading known also as shadowing, refers to the variations of the received signal mainly caused by obstructions that significantly affect the available signal power at a receiver’s position. Although the variability of shadowing is considered mostly spatial for a given propagation environment, moving obstructions may significantly impact the received signal’s strength, especially in dense environments, inducing thus a temporal variability even for the fixed users. In this paper, we present the case of lognormal shadowing, a novel engineering model based on stochastic differential equations that models not only the spatial correlation structure of shadowing but also its temporal dynamics. Based on the proposed spatio-temporal shadowing field we present a computationally efficient model for the dynamics of shadowing experienced by stationary or mobile users. We also present new analytical results for the average outage duration and hand-offs based on multi-dimensional level crossings. Numerical results are also presented for the validation of the model and some important conclusions are drawn.

Sign in / Sign up

Export Citation Format

Share Document