American Journal of Electrical and Electronic Engineering

UMTS Terrestrial Radio Access Network (UTRAN) dimensioning has been of great interest among network researchers and planners due to the limit of cell bandwidth. This paper investigates the impact of service changes on the nature of radio interface UMTS bandwidth. Finally, OPNET simulation models are developed. The main purpose of modeling was to obtain the dependency of common capacities of the base station for the upward and downward directions on time. Different types of customers were used as the criterion for comparison the values obtained.

American Journal of Electrical and Electronic Engineering. 2013, 1(1), 15-18. DOI: 10.12691/ajeee-1-1-3
Pub. Date: March 17, 2013

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Price Based Unit Commitment Considering Fuzzy Uncertainty

by Reza Khorramnia and Soroush Karimi Khorrami

Original Research

In deregulated systems, bidding plays an important role for Gencos participating with the objective of maximizing proﬁt. While making bidding strategies, factors like unit constraint and price uncertainty need to be considered as they have direct impact on the expected proﬁt. The goal of the partnership units of solution is based on the price. By solving this problem, the generation company to determine the optimal generation schedule and unit status hourly. MCP plays an important role in the profitability of the units. In this paper, a novel approach to solving an optimal bid curve underprice uncertainty using PBUC in PAB markets is presented. Numerical results show the suitability of the method on a sample market.

American Journal of Electrical and Electronic Engineering. 2013, 1(1), 10-14. DOI: 10.12691/ajeee-1-1-2
Pub. Date: March 05, 2013

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A Cross-Layer Qos Based Scheduling Algorithm WRR Design in Wimax Base Stations

by Hattab Guesmi and Sassi Maaloul

Original Research

The IEEE 802.16 standard defines a wireless broadband access network technology called Wimax. It introduces several advantages, one of which is the support for Quality of Service (QoS) at the MAC level. To ensure meeting the QoS requirements, the 802.16 base stations must run some algorithms to allocate slots between connections. Call admission and scheduling are the strongest tools in our hand to ensure QoS. We propose an efficient design architecture that is capable of allocating slots based on the QoS requirements, bandwidth request sizes, and the 802.16 network parameters. To test the proposed solution, we have implemented a cross layer between the 802.16 MAC and the network layers in the NS-2 simulator and, then in RTL level with VHDL to be designed in FPGA. Several simulation scenarios are presented. According to the simulation results, the proposed scheduling solution ensures the QoS requirements of all 802.16 service classes. The solution shares free resources weighted fairly and demonstrates work-conserving behavior. The proposed design in this paper was analyzed: simulation results show a significant performance improvement in terms of overall throughput and delay when compared to recently published work.

American Journal of Electrical and Electronic Engineering. 2013, 1(1), 1-9. DOI: 10.12691/ajeee-1-1-1
Pub. Date: March 17, 2013

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36968 Views17394 Downloads35 Likes6 Citations