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Optimization of cable path in a Wan using GIS
Methodology
The project presents a situation of planning a Wide Area Network (WAN) in technical education campus of Birla Institute of Technology & Science (BITS), Pilani, Rajasthan, India. The aim of the project is to provide net access to around 3500 students and 600 staff’s quarters.
The project aims at providing net access to all rooms by WAN. The cables used are the outdoor fiber and indoor copper cable. The basic plan is to take the outdoor fiber from a core (master) switch to a distribution switch from where the access switch can cater to the rooms using indoor copper cables .The number of distribution, access switch varies depending on the need. The project aims to find an optimum path for both the fiber and indoor copper cables and hence reduce the cost. The present paper aims to extend the use of GIS to cable networks integrated with drawing tools such as AUTOCAD. The aim of the project is to provide net access to all rooms by WAN. The copper wires used for this purpose are of two types
- Outdoor fiber,
- Indoor cables.
The outdoor fiber is taken from a master switch to a distribution switch, which is placed inside a building from where the indoor cables cater to access switches and also from the access switches to every room. The first phase of the project is aimed at finding an optimum path for the outdoor fiber i.e. from the master switch to the distribution switch so that the material cost and trenching cost is reduced. The images of the hostels and the interior view of the hostels are created with AUTOCAD RELEASE14 and AUTOCAD 2000 and then imported into ARC VIEW for analysis. Network analyst and shortest path analysis are used to find the optimum path for the cables so as to reduce the cost. Various constraints are taken care when using cables and few are mentioned before.
Optimum Path For Outdoor Fiber
The digital map of the campus is taken and the basic operations such as Geo referencing, digitizing are carried out. For georeferencing we have to store the map in TIF image format and then create a note pad file with TFW extension. We should store both these in the same folder in which we are working and the other files which are created by Arc view are automatically stored in this folder. The georeferncing was done in comparison with the length and breadth of Budh bhawan. Then the different bhawans were digitized as a polygon theme and the road network was also digitized as a separate theme. The themes are stored as shape files with the .shp extension. Arc view automatically creates .dbf and .shx files for these themes.
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