Design and Implementation of NMEA Multiplexer in the Optimized Queue

Kim, Chang-Soo; Jung, Sung-Hun; Yim, Jae-Hong

Journal of Navigation and Port Research 2005;29(1):91-96.
Published online February 28, 2005.

최적화된 큐에서의 NMEA 멀티플렉서의 설계 및 구현

김창수, 정성훈, 임재홍

Design and Implementation of NMEA Multiplexer in the Optimized Queue

Chang-Soo Kim, Sung-Hun Jung, Jae-Hong Yim

Abstract

The National Marine Electronics Association(NMEA) is nonprofit-making cooperation composed with manufacturers, distributors, wholesalers and educational institutions. We use the basic port of equipment in order to process the signal from NMEA signal using equipment. When we don’t have enough one, we use the multi-port for processing. However, we need to have module development simulation which could multiplex and provide NMEA related signal that we could solve the problems in multi-port application and exclusive equipment generation for a number of signal. For now, we don’t have any case or product using NMEA multiplexer so that we import expensive foreign equipment or embody NMEA signal transmission program like software, using multi-port. These have problems since we have to pay lots of money and build separate processing part for every application programs. Besides, every equipment generating NMEA signal are from different manufactures and have different platform so that it could cause double waste and loss of recourse. For making up for it, I suggest the NMEA multiplexer embodiment, which could independently move by reliable process and high performance single hardware module, improve the memory efficiency of module by designing the optimized Queue, and keep having reliability for realtime communication among the equipment such as main input sensor equipment Gyrocompass, Echo-sound, and GPS.

Key Words: NMEA 0183;MULTIPLEXER;QUEUE;MULTI PORT;GPS;RS232