48 Copyright © 2019, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited. Chapter 3 DOI: 10.4018/978-1-5225-5693-0.ch003 ABSTRACT Heterogeneous networks are comprised of dense deployments of pico (small cell) base stations (BSs) overlaid with traditional macro BSs, thus allowing them to communicate with each other. The internet itself is an example of a heterogeneous network. Presently, the emergence of 4G and 5G heterogeneous network has attracted most of the user-centric applications like video chatting, online mobile interac- tive classroom, and voice services. To facilitate such bandwidth-hungry multimedia applications and to ensure QoS (quality of service), always best-connected (ABC) network is to be selected among available heterogeneous network. The selection of the ABC network is based on certain design parameters such as cost factor, bandwidth utilization, packet delivery ratio, security, throughput, delay, packet loss ratio, and call blocking probability. In this chapter, all the above-mentioned design parameters are considered to evaluate the performance of always best-connected network under heterogeneous environment for mobile users. INTRODUCTION The advent of telecommunication has greatly reduced the communication distance between users. How- ever, the emergence of cellular generations from 1G to present 5G has attracted a large number of users to enjoy many value added services like mobile multimedia applications, videoconferencing, online classroom besides voice services. The main challenge is to provide seamless and always best connected services to the demanding mobile user in hostile environments (Marques V., et al., 2003).However, the trade- off between bandwidth and delay of Always Best Connected network for bandwidth hungry ap- plications in the vicinity of heterogeneous network is still a research issue. Predictive Methods of Always Best-Connected Networks in Heterogeneous Environment Bhuvaneswari Mariappan University Chennai, India