Performance Improvement of Packet Delay in Advanced Public Transportation System Using Multi Path UDP on Cellular Environment

Mobile wireless networks are now capable of carrying tens of Mbps of data. The development of mobile wireless network has also triggered the development of many mobile applications that can support the Intelligent Transportation System (ITS). Some mobile applications require a reliable wireless communication network in order to maintain real-time communication. However, the quality of mobile wireless link is affected by its propagation channel: its propagation environment and velocity of the mobile terminal. In order to enhance the reliability of mobile wireless communication channel, the use of multipath data link is introduced. At the moment, the existing multipath internet has not yet been applied to mobile wireless network. This paper proposes a data communication protocol using multipath User Datagram Protocol (MP-UDP) in order to shorten data transaction latency between mobile terminal and its server. The measurement results show that the use of MP-UDP could significantly improve the availability performance in poor wireless communication link. The field measurement using 4G-LTE (Long Term Evolution) network in the city of Malang has shown increasing availability of a 1 second time-out packet data communication link, from a 96% availability for a single UDP path towards a 98.9% availability for MP-UDP.