Hello, everyone!
Today, I would like to share with you an
article about a proposed Techno-Economic Model framework.
To support the new needs of the access networks (bandwidth and mobility), the proposed framework (Figure 1) is divided into two perspectives (static and nomadic) and three layers. In the static perspective, users are stationary and normally require data, voice, and video quality services. These subscribers demand great bandwidth. In the nomadic/mobility perspective, the main preoccupation is mobility, and normally, the required bandwidth is smaller than the static layer.
Focus of the wireless networks was to support mobility and flexibility while that of the wired access networks is bandwidth and high QoS. However, with the advancement of technology wireless networks such as WiMAX also geared to provide wideband and high QoS services competing with wired access networks recently.
The proposed model divides the area into several access networks (the figure is divided into 9 sub-areas, but the model can divide the main area between 1 and 36). The central office is located in the center of the area, and each sub-area will have one or more Aggregation Nodes (AGN) depending on the technology in use.
Figure 1. Cost model framework architecture
As we can see in Figure 1, the framework is separated into three main layers:
(Layer A) Firstly, we identify the total households and SMEs (Static analysis) for each sub- area, as well as the total nomadic users (Mobility analysis). The proposed model initially separates these two components because they have different characteristics.
In layer B, the best technology is analysed for each Access Network, the static and nomadic components. For the static analysis we consider the following technologies: FTTH (PON), DSL, HFC, and WiMAX PLC. For the nomadic analysis we use the WiMAX technology. The final result of this layer is the best technological solution to support the different needs (Static and nomadic). The selection of the best option is based on four output results: NPV, IRR, Cost per subscriber in year 1, and Cost per subscriber in year n.
The next step (Layer C) is to create a single infrastructure that supports the two components. Bearing this in mind, the tool analyses each Access Network which is the best solution (based on NPV, IRR, etc). Then, for each sub-area we verify if the best solution is: a) the use of wired technologies (FTTH, DSL, HFC, and PLC) to support the static component and the WiMAX technology for mobility; or b) the use of WiMAX technology to support the Fixed and Nomadic component.
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