Final Report Chapter 7 Outline of Scope of Works CHAPTER 7 OUTLINE OF SCOPE OF WORKS 7.1 Outline of Project Plan 7.1.1 Transmission equipment for the backbone network connecting the three metro cities (1) Current situation The backbone network currently connecting the three metro-cities of Yangon, Naypyitaw and Mandalay is constructed of microwave radio links and fiber optic cable links. The microwave radio links are provided on three routes in the west, center and east, while 12-core fiber optic cable has been laid along national roads and 96-core fiber optic cable has been laid along the highways. However, the transmission equipment for the fiber optic cables is insufficient and the microwave radio links are decrepit and inadequate in terms of quality. (For details, refer to 5.2.2(1).) MPT therefore has introduced wavelength division multiplexing (WDM) equipment with a bandwidth of 30Gbps and strengthen the backbone network using 96-core optical fiber along the highways through the Project for Urgent Improvement of Communication Networks under Japanese Government grant aid. MPT is also currently constructing new fiber optic cables between the three metro-cities, called the backbone network, and further expansion is planned with existing optical fiber routes. (2) Necessity (Relevance) After considering the capacity requested by MPT, it was judged to be appropriate and a backbone network plan was formulated as shown below. When calculating the capacity of the transmission line in relation to the transmission speed values shown in Table 5.2-7 in Section 5.2.7, as well as the need to estimate double the capacity in order to cope with two-way incoming and outgoing traffic, it is also necessary to make allowance for double the capacity in order to ensure redundancy in a ring configuration. Therefore, the total transmission capacity will be 2.5Tbps or more, four times the “total communication speed” shown in Table 5.2-7. When this is distributed on the three routes currently planned, approximately 800Gbps is required per route, so the 500Gbps requested by MPT is not excessive. On the other hand, as the total two-way incoming and outgoing capacity for average traffic demand (419.50Gbps) is about double at 840Gbps, the planned capacity to be introduced in this project (500Gbps) is approximately 60% of total average demand and is judged to be capable of coping with increased demand for the foreseeable future. As the transmission equipment can easily be expanded, it would be not urgent to cope with 100% of average traffic demand at present and in consideration of improvement status of communication networks, appropriate steps can be taken as necessary in future. As the wavelength division multiplexing equipment (30Gbps) which was introduced through the grant aid project is operated as it is, the total route (route B) capacity becomes 530Gbps. 7-1