A design approach to maximize handover performance success rate and enhancement of voice quality samples for a GSM cellular network
Prabhjot Singh, Mithilesh Kumar, Ambarish Das · 2014
Continuation of an active call is of prime importance in the cellular systems. In this paper a new approach has been designed to maximize handover success rate (HOSR) and voice quality for a GSM cellular network both related to customer satisfaction and performance of cellular operator which enhances revenue of the company. Initially, an effective frequency planning is done for GSM 1800 MHz BTS (base transreceiver station) sites, where a set of BCCH frequency (broad cast channel) - BSIC (base station identity code), MAL frequency (mobile allocation list) with MAIO (mobile allocation index offset) and HSN (hopping sequence no) is used. Afterwards to improve handover, neighbor list verification is done and unnecessary neighbors are deleted. Neighbors define within the first tear of base cell with the help of commercial tool. Handover reversions and ping pong cases also minimize via frequency check and physical optimization. We found our results with the help of Google Earth and simulation software to practically implement these changed values in the mobile industry field. Overall, reversions have been minimized for BTS sites and in addition to that, we have expanded our work for 93 sites of a city in India. Results are promising with overall HOSR (handover success rate) in NBH (national busy hour) is improved by 11 % and during BBH (bouncing busy hour) HOSR ≥ 95 % improved by 12 % in comparison of previous frequency plan. Additionally, we have found that voice quality samples in DL (downlink) and UL (uplink) are also improved. In NBH period DL RX (receiver) quality samples (0-5) improved by 8% and UL RX quality samples (0-5) improved by 2% over previous quality samples. During BBH Period DL RX quality samples (0-5) ≥ 95 % improved by 17% and UL RX quality samples (0-5) ≥ 95 % improved by 14%.