A Microwave Link Design between Imoc Relay Station Caluan, Laguna and Light Industry and Science Park I, Cabuyao, Laguna
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The study aimed to provide a microwave communication link design connecting Philippine Long Distance Company (PLDT) and Light Industry and Science Park I (LISP I) through Imoc Relay Station, PLDT’s main repeater station located in Calauan, Laguna. The link would serve as PLDT’s secondary connection or back-up in case of failure in their existing fiber optic link. To comply with the reliability requirement of at least 99.9998%, the study used qualitative method in determining necessary factors that could affect the design. These consist of the path profile, link budget, and azimuth. The calculations were accomplished based on the gathered data and suggestions given by the experts. The selection of radio equipment was based not only on the system requirements but also as recommended by PLDT. It was proven that the link design was feasible for PLDT’s data and voice transmission. It was also proven that using Siemens Digital Radio equipment best fits the requirements needed by the client-company as it satisfies both reliability and economic analysis. The study, therefore, recommended this microwave communications link design to Philippine Long Distance Company as it was proven reliable after obtaining an overall system reliability of 99.9999%Keywords:
Repeater (horology)
Microwave transmission
Data link
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LPWAN
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This study aimed to create a design, equipped with the technical and economical considerations which would establish efficient and reliable microwave communication link between Philippine Long Distance Telephone Company (PLDT)-Crossing, Calamba City, Laguna and Philippine National Police Academy (PNPA)-Camp General Mariano N. Castaneda, Silang, Cavite. The design was planned to replace the present 400 MHz radio link into a 7 GHz microwave link to increase the traffic capacity of the link from only 2 voice channels to 4E1, such that not only voice can be transmitted but also audio, video, and other data. The link was designed to have a reliability of 99.99999%. The study intended to achieve the requirements specified by the client-company and considered all the parameters needed in a microwave communication system. To ensure reliability and efficiency of the system, data gathering procedures, mathematical computations, and simulations were performed. Based on the computations and analysis between the compared sets of equipment TRuepoint 5200C, MDL 2007/2008, and CFM; TRuepoint Harris 5200C microwave radio equipment, together with Andrew HP 12-71 antenna and a EWP77-71W elliptical waveguide, satisfies all the requirement in selecting the equipment presented in this study. The reliability objective of 99.99999% was achieved after performing several computations. The total project cost of the study was Php 6,847,451.50 and the computed rate of return was 20.81% with a payback period of four years and thirty days which makes it feasible for a study period of five years.
Link (geometry)
Payback period
Microwave transmission
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This study aimed to design a microwave communication link between Sta. Cruz and Nagcarlan in Laguna for the expansion of Digital Telecommunications Inc., Philippines (DIGITEL). This microwave link provides the needed transmission bandwidth and reliability to allow transmission telephony, transmission of data, router link, protection relay link, and administration transaction. This study would provide the necessary equipment to be used in building microwave communication between the two given sites. It would also provide the necessary preparations, procedures, and mathematical calculations that would support the establishment of the microwave communication link between the two sites. This design aimed to be economical on the part of DIGITEL by computing the different parameters in determining the feasibility of the study. Different preparations and computations were conducted to achieve the objective of the study. Path survey and actual visitation were conducted to achieve and verify a clear line of sight for the design. Path calculation was also conducted to verify if the microwave link can achieve the required reliability which is 99.9999%. The study also provided the necessary economic study to show if the design is feasible for the client. The computed reliability was 99.99991806% and 99.99991942% for the low band frequency and high band frequency respectively. Results in the economic study showed that the payback period is 8.44 months.
Microwave transmission
Link budget
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