Blocking Estimation Using Optimal Channel Reservation Policy in GSM 1800 System

Abstract

AbstractVoice is one among the important services provided by any mobile cellular network. The deployment of 5G that is the advanced mobile cellular communication technology will be more important than ever for the world, through various types of use cases. A 5G smartphone will not connect to a mobile network unless voice support is available, so enabling this is a must. Voice service requires end-to-end 5G network support to enable the high-quality voice service experience for mobile devices. So, we need to consider the whole network chain with IP Multimedia Subsystem (IMS), 5G core, and 5G radio access network (RAN)s. To provide seamless voice handover when users move between cells and access technologies, the network must also handle interworking toward 4G, 3G or 2G in case the users move out of 5G coverage. Evolved packet system (EPS) will be helpful for service providers when they are migrating from 4G to 5G. Circuit Switched FallBack (CSFB) will be helpful for service providers when they are migrating from 2G/3G to 4G. Once the call is set for voice communication if the mobile host (MH) moves from one cell in the wireless cellular network to another and finds no free channel in that cell, then the call will be dropped. To address this issue in this paper, we have presented an optimal channel reservation (OCR) policy. It reserves channels in a cell according to the target handoff call dropping probability (HCDP). So, it minimizes new call blocking probability (NCBP) and keeps HCDP below the target. We have applied this policy to Global System for Mobile Communication (GSM) 1800 system and observed that HCDP is below the target and NCBP is minimum.KeywordsNew call blockingHandoff call droppingOptimal channelGSMMobile cellular networks