فهرس المقالات Chukwudi Chukwudozie المقاله 1 - Re-CAC: A Re-Engineered Call Admission Control for LTE Downlink Networks Using Stepwise Bandwidth Degradation Concept Vitalis Onyeke Udora Nwawelu Bonaventure Ekengwu Nnaemeka Asiegbu Benjamin Ezurike Dumtochukwu Oyeka Chukwudi Chukwudozie Chimdalu Okide Journal of Information Systems and Telecommunication (JIST) , العدد 2 , السنة 14 , زمستان 2026