LTE Test & Deployment Engineer

Menlo Park, CA 94025

Posted: 04/08/2019 Employment Type: Contract Industry: RF Engineer, System Test and Integration Job Number: 24080

Job Title: LTE Test & Deployment Engineer
  • Configuration and testing of cellular systems (2G GSM, 3G UMTS, 4G LTE) in a lab and field trial environment, with focus on cellular core network elements (MSC, IMS, MME, SGW/PGW, OCS, PCRF, etc.)
  • Integrating, testing and troubleshooting various 3GPP core interfaces such as S1, S11, S5, S8, SGi, Gx/Gy, S6a, etc.
  • Testing and validation of features such as LTE mobility management, handoffs, roaming architecture, CSFB, VoLTE, etc.
  • Configuration and integration of RAN radio equipment and backhaul technologies such as microwave/satellite with EPC core network
  • Install, maintain and operate various test tools & equipment (hardware and software) used during lab trial and field trials
  • Development of interoperability test plans with focus on core network elements, but also including site shakedown, site verification and field trial test plans
  • Execution of test plans ensuring requirements are met, automation of test cxases, documentation of test procedures, reporting and analysis of issues, bug fix verification
  • Creating various documents for system integrators, engineering and network operators (eg., training, installation, troubleshooting)
  • Engaging with various internal teams and external teams such as OEMs and Operators during lab trials and field trials
  • International travel in support of field trials

  • Working knowledge of 3GPP specifications, specifically 2G GSM, 3G UMTS, 4G LTE
  • Experience configuring, testing and integrating UE, eNB, SGW, MME, PGW, EPC, PCRF, OCS, IMS
  • Experience with end-to-end LTE call flow procedures, RRC connection setup, attach/detach procedures, S1 link establishment, CQI/RI, S5/S11 interfaces, Gx/Gy interfaces, radio link failures
  • Working knowledge of EMS, NMS systems, fault management & performance monitoring & configuration management
  • Strong knowledge of RAN KPIs, backhaul KPIs and core KPIs
  • Experience with configuration and troubleshooting voice related services such as CSFB, SRVCC, VoLTE
  • Strong knowledge in linux/networking configuration (DHCP, DNS, IPv4/IPv6, VLAN, virtual interfaces, MTU)
  • Experience with test plan execution, troubleshooting and documenting issues, setting up test beds, configuring test equipment, RF chambers and troubleshooting end-to-end 2G/4G systems
  • Experience with traffic generators (eg., TM500, UE100, UDP/TCP iperf, speedtest), UE load testing, spectrum analyzers, protocol analyzers (eg., wireshark)
  • Experience with drive tests equipment such as QualiPOC, Nemo, TEMS
  • Strong experience in automating test cases, API integration, python scripting
  • Troubleshooting and replication of issues seen in lab trials and field trials. Collect and analyze network and device logs and work with vendors and operators to close on issues
  • Desired experience with cloud-based controllers and orchestrators
  • Desired understanding of Carrier WiFi Offload, LTE-U and Private LTE

Education: Bachelor' s degree in engineering or related discipline
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