Design and Performance Analysis for Data Transmission in GSM System with Voice Activity Detection

• Main Authors: Jiann-Horng Chen, 陳建宏
• Other Authors: Szu-Lin Su
• Format: Others
• Language: en_US
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/01786454957314748516

碩士 === 國立成功大學 === 電機工程學系 === 87 === In today's mobile communication systems, a major tendency is to provide multi-media communication capability. In order to efficiently utilize the bandwidth of cellular mobile system and offer high quality service to both voice and data users, we propose a protocol to integrate packet-switched data traffic into current TDMA-type circuit-switched digital voice system. In this thesis, we analyze the performance of the proposed system, which transmits data packets in the silent periods of a conversation with voice-activity detection and adapts itself to the GSM/GPRS system which uses the idle channels to provide data services. We show that the proposed method can increase the bandwidth utilization efficiency as well as reduce the data transmission delay, while still keep high quality of voice services.