Packet Switch Core Engineer at Ascentech Services Limited

Roles and responsibilities 

• Maintain packet switching core nodes (SGSN, GGSN, MME, SGW/PGW, CG, and Switch) and resolve UE browsing issues. Handling technical queries, technical presentation and root cause analysis. 
• Back Office support, Alarm monitoring, problem identification and resolution. 
• Designed EPC packet switched core network topology and planned IP address/VLANs for new build LTE network. 
• Monitoring and analysis of PS core Performance KPIs for any complex issues in the network. 
• Analysis of traffic measurements, success rates and other PS KPI performance. 
• Integration of BSC, RNC, eNodeB, HSS, OCS, PCRF with PS core network nodes. 
• PS projects implementations and support for operator networks. 
• STP and DRA Swap project. 
• Designed the EPC packet switched core network topology and planned IP address/VLANs for new build LTE network. 
• Commissioned and configured SGW/PGW, MME and CG and achieved end to end first call. 
• Configured and integrated LTE network with already existing 2G and 3G Network. 
• Performed software upgrade, license loading and rectifications on Huawei SGSN, GGSN and CG to enable interoperability between the GPRS/UMTS and LTE nodes. 
• Strong Knowledge of MME, SGSN, SGW, PGW, GGSN, PCRF, VoLTE, CG, DNS, URL Server, OCS 
• Strong Knowledge on Protocols: BSSAP, RANAP, GTP, MAP, SCTP, Diameter, SGSAP, S1AP, RADIUS 
• Good Knowledge on Interfaces: Gb, Ga, Gn/Gp, Gr, Gf, Gi, Gy, Gx, SGs, S1, S6a, S10/S11, S5/S8, GGSN, SGW, PGW , SGSN, MME, CG, DNS, Switch, Firewall, SPS, HLR/HSS, PCRF 
• KPIs Analysis: Mobility, Accessibility, Retain ability, Availability, etc Location Lagos Designation EPC Core Network Engineer

Experience From 4 Years Qualification

Requirements

• Graduate in Computer Science / Information Technology / Networking / telecom. Certification required : CCNP, CCSP, CCDA Working knowledge on Cisco & Huawei network switches and routers. Detailed technical knowledge of L2 & L3 routing, switching protocols. Available to work in 24*7 shift time, on-call support. 
• Analysis and Solution for E2E problems like throughput, accessibility, and mobility. 
• Abilities to evaluate the network performance. 
• Good knowledge on CS nodes configuration and parameters (MSC MGW HLR HSS etc), basic and optional features to help to improve the network performance and user experience. 
• Abilities to Planned and Designed HLD/LLD for entire EPC Core. 
• Abilities to Implement Layer7 DPI, Content Based Charging, service based traffic shaping, flow based charging and Bandwidth control. 
• Configuration of Cisco routers and switches. 
• Huawei Routers and Switches. 
• Strong Knowledge of routing protocols such as static, ospf, isis, bgp, mpls,l2vpn. 
• Hands on Huawei PS Core equipment’s and Cisco Routers. 
• Availability to system 24X7 for any issue resolution and willing to learn further