A Study on the Improvement of Mobile Communication Software Research and Development Model

service coverage of service terminals and quality have developed dramatically as mobile communication systems gradually evolve from 1G analog to 2G digital, to 3G Wideband Code Division Multiple Access (WCDMA), Long-Term Evolution (4G LTE), and New Radio (5G NR). To this end, complex HW and SW that can increase the system processing speed and support wide frequency bandwidth are essential. In particular, with the advent of the 5G communication market, the size and complexity of SW have increased significantly because HW, which supports various frequency bands, requires SW that supports various functions. In addition, there are cases where new functions must be provided only by an SW upgrade without a HW change, making SW quality assurance more critical. In this study, only the Waterfall method was used when developing mobile communication equipment SW, as a market quality stability issue due to the nature of communication equipment, even if it took longer. On the other hand, a new Hybrid Agile-K model that can improve chronic market problems simultaneously was presented along with repetitive and gradual model presentation using the advantages of Waterfall and Agile models to change new communication protocols, such as 5G, and respond to customers' rapid market demands.