Dual-bandwidth data path for 4g mobile internet

Abstract

4G networks are a network that will merge various networks such as CDMA2000, Wireless LAN and WCDMA into an IP-based network that will be available globally to everyone. 4G technology is a very complex technology of integrating different new techniques, and 4G services for a higher speed wireless Internet access and it will be dominated by 4G wide area cellular networks, wired Internet and hot-spot wireless LANs, which will complement each other to provide ubiquitous high-speed wireless Internet connectivity to mobile users. In such integrated environment, these varying networks combination may cause bandwidth disparity issues because of different network conditions. From Lucent research, studies show that the Internet characteristics in bandwidth utilization that relates to request amounts to one fourth of the reply. WLAN bandwidth is much wider then cellular network. For the CDMA2000-WLAN integrated system, inside the overlapping coverage area, users would prefer to access the Internet through the WLAN network for higher data rates. This is a disadvantage since WLAN network will be busy whereas CDMA2000 network resources not fully used. For this reason, we thought that efficiently utilizing the bandwidth disparity of the two networks is necessary and great advantage for the integrated system to get higher data rates and larger capacity. Thus, this research focused on the bandwidth disparity issue and considered to utilize this kind of disparity efficiently to send request through cellular network and get reply through WLAN network according to Internet characteristics. In order to solve this problem, we propose Dual-bandwidth data path and design a new protocol named Bandwidth Optimization Control Protocol (BOCP) for the integrated architecture of CDMA2000 and WLAN. The designed BOCP protocol has been simulated in ns2 Java version simulator. The results show that the Dual-bandwidth data path has been established within CDMA2000 and WLAN networks and achieved higher data rates.