Channel model based on semi-Markovian processes. An approach for HAPS systems
CONIELECOMP '04 Proceedings of the 14th International Conference on Electronics, Communications and Computers
HAPS Systems Performance Using a Ka-Band Channel Model Based on a Time Series Generator
CONIELECOMP '05 Proceedings of the 15th International Conference on Electronics, Communications and Computers
4G Wireless Begins to Take Shape
Computer
ICWMC '08 Proceedings of the 2008 The Fourth International Conference on Wireless and Mobile Communications
The role of high altitude platforms in beyond 3G networks
IEEE Wireless Communications
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OFDM/OFDMA based physical layer, wide channel bandwidths and operation at higher frequency bands are the features common to all potential candidate 4G technologies in order to achieve unprecedented high data rates and better QoS. But these very features of 4G necessitate extraordinary small cell size in 4G Wireless Cellular Networks (WCN) to meet the link budgets. This makes an efficient and cost effective ubiquitous deployment solution for 4G WCNs a big challenge. This paper investigates two different deployment solutions for 4G WCNs and presents a comparison between them in terms of performance, capacity and deployment cost factors in relative terms. The first solution is conventional Terrestrial Base Stations based WCN with reduced cell size (TWCN) and second solution is 4G WCNs deployment via High Altitude Platform i.e. HWCN. WiMAX is taken as bench mark in this study as it is most well known standard that has all the aforementioned characterizing features of 4G technologies. The performance of HWCN and TWCN is evaluated through extensive system level simulations that model realistic details like link level performance, dynamic interference, and shadowing and propagation characteristics of the two systems. Effects of spectrum reuse factor, Adaptive Coding and Modulation (ACM) and user traffic type on the performance of two solutions are investigated and compared in detail. Finally a relationship between the relative deployment costs of the two systems is developed and used to assess the deployment costs of the two systems normalized over the capacity they offer in order to analyze their economic feasibility relative to each other.