Jung H Kim

6472 Riverside Drive, Frisco, TX 75035

469-525-3538 (mobile)

jeffkim0802@gmail.com

 

·               Self-motivated and reliable embedded software, firmware and hardware engineer

·               Versatile experience with various areas of a Wired and Wireless telecommunication system(DSL/L2 Switch/3GPP2/3GPP/WIFI/ATM/TCP/IP)

·               Excellent skills for Bring-Up(BSP, Uboot/BootLoader), RTOS(Linux/Vxwork/XINU/Psos), TCP/IP, Ethernet  switch, xDSL(DSLAM),.

Aug 2014 -   Current                     GoldenSpear Inc.                                                                      San Francisco, CA

                            Embedded Software Engineer - Phase 2 for WCDMA FemtoZone Recognition Device..

- Develop  and  implement a simple function of Autoconfiguration and OneIP using Bash shell

                              scriptiong and C language with a TCP/IP Socket and WIFI function on the multi-core and multi-

                              thread.

- Debug  and solve a problem of Software protocol stack(SIB: RRM parameter config(Qxdm), Mobile

                              data backup  and Hardware (Circuit  design Review), Modify and port  some I/O and I2C (Device

                              Drivers) in embedded linux (ARM/MIPS).

- Perform a unit and integration tests the WCDMA FemtoZone Recognition Device at a customer site.

- Review and design a Voice(SIP)/Data Offload architecture with IMS core network.

                           - Install the GS RMS server.

 

* I am implementing a UART /HTTP communication protocol on CC3200(TI- microcontroller with WIFI: ARM Cortex-M4) with CCS environment tool)

 

Jun 2013 - Jun 2014

                        NexelOne, Inc.(Changed the company name From Minieum Networks)              Carrollton, TX

Senior embedded software Engineer – Phase 1 for WCDMA FemtoZone Recognition Device

§    Designed and implemented the own operation and Management(OAM) with multi-core, multi-threads and Linux 2.4 using  C and TCP IP/Socket programing.

-  Designed and implemented a managed elements and IPC(inter process communication)  with multi-core and RMS(BSM) server using TCP Socket communication. on  embedded Linux

- Developed a Fault/Control  management and image download management..

§    Designed a One IP architecture with Bash scripting and WIFI on a multi modules.

§    Perform a unit and integration tests

§    Installed a Field trial of WCDMA FemtoZone using RRM parameters.

§    Debugging the BSP(ARM/MIPS(RISC)/I2C ) of Linux system(cpu Crash, Mem Leak..) with GDB, Wireshack , QXDM, and shell scripter(Bsh) for system bring up.

§    Analyzed and installed the RMS (Mysql, shell scripter).

§    Evaluated and checked the Freescale(PSC9131) reference system using the Aricent LTE protocol stack with emulated EPC.

§    Analyzed and Adjusted a TX power of WCDMA  Femtozone system with QXDM..

Configured and check the WIFI functions .

§    performed a debugging and modifying for  3GPP protocol stack(MIB/SIB encoding/decoding, RRC connection, ASN.1)

 

 

Dec 2009- May 2013          Minieum Network                                                                                                                  Plano, TX

Senior embedded Software Engineer/Manager, WCDMA Pico & Femto System

§    Integrated and coordinated software blocks for the WCDMA FEMTO and PICO product..

§    Design and implementation of a RF Control Software and device driver and RU(Remote Unit) on the embedded system.

§    Validated, ported and test the Data Offload using CCPU protocol stack and Core Network

§    Bring up the system with bootrom(ARM/MIPS(RISC)) and  embedded Linux kernel with UART and  TCP/IP using JTAG Trace32.

§    Debugging a crash and memory leak(user and kernel level) using GDB.

§    Configured and control the WIFI App and 5 port Ethernet switch(LAN and WAN)

§    Porting and implementation of the BSP(Linux) on the ARM core(Assembly and C).

§    Verification and Test of WCDMA Modem chipset (Picochip) in stand-alone Linux

§    Test and Troubleshoot of the WCDMA system (FEMTO/PICO) each function (Voice/Data) with Core Network Emulator (CNE) and Mobile phones.

§    Programmed an auto test program using AT command (QXDM) with mobile phone

§    ported and configured the WCDMA Mobile Receiver(Listener)

§    Study and analysis the Layer 1, MAC, RRC, RRM and SIGTRAN(C++)

 

§    Implementation and validation of a system service interface block(Linux Kernel) between Linux and CCPU(WCDMA) stack

 

 

 

July 2006- Nov 2009       AirWalk communication.                                                                      Richardson, TX                           

Senior Embedded Firmware Engineer/Hardware depart manager,   CDMA RAN system

§    Debugging and implementation of device drivers( the Digital Intermediate Frequency Block (PUC/PDC) Device) in BTS of CDMA2000 Wireless Systems (including FEMTO system).

§    Debugging and implementation of the XCVR (Transceiver) Device Driver (PLL Lock & Power calibration) Block of 1.9G, 800M and 450M in CDMA2000 Wireless Systems (including FEMTO),

§    Understand/Validation of the CSM (Qualcomm 5000(1x)/6800(EvDo)) device driver block in CDMA2000 Wireless Systems (including FEMTO).

§    Test, repair and debugging of the BTS/BSC system in CDMA2000 Wireless Systems (including FEMTO).

§    Design and implementation of the system Auto-test(mass production) program in PC environment(Visual studio .Net)

§    Design and implementation of the BSP on VxWorks RTOS.

§    Debugging a bootrom (MCP8260) with Assembly and  C using JTAG Vision Probe.

§    Read and analyzed the circuit board schematic and BOM.

 

Jan 2003- July 2006

                          Winscom Technology(Changed the company name from Unicess Networks, Inc)                Addison, TX

Senior embedded Software Engineer,    VDSL CO and CPE system                                                       

§    Ported and debugging  a BootRom  and BSP using GDB, performed  a port of the Linux RTOS(MontaVista) and Vxworks (system bring-up)

§    Development and porting of VDSL Device Driver on VxWorks/Linux. and Development and porting of CLI, SNMP Agent API

§    Perform a unit and integration tests

 

Jun 2000- Dec 2002  Unicess networks, inc. Plano, TX

Senior embedded software Engineer , DSLAM system

§    Ported a Boot Rom for MPC750/MPC8260 /MPC850 CPU using JTAG Vision ICE(System Bring-up)

§    Designed and implemented a CLI and  SNMP Agent API

§    Ported of RTOS(Vxworks) and implemented Device drivers and BSP(Assembly and C).

§    Perform a unit and integration tests

 

1996-2000Daewoo institute for advanced engineering(IAE) Seoul, KOREA

Researcher of telecommunication Software    ATM LAN switch

§    Performed  a design and implementation of  Device Drivers(Cellbus Controller [CUBIT], OAM/UPC[ATM Device], STM-1, E1 and DS3 PHY)..

§    Performed a Port of  RTOS(pSOS) and Debugging the bootrom (MPC860: Assembly and C )using JTAG Vision ICE(BSP) : system bring-up.

§    Performed a design and implementation of SNMP(Agent) API for ATM&PHY MIB.

June 1996University of Hong-Ik            Seoul, KOREA

Master of Electrical & Control Engineering

 

Feb 1994University of Hong-IkSeoul, KOREA

Bachelor of Electrical & Control Engineering.

 

 

Tool: pRISM(psos), Workbench(VxWorks), Jtag BDM(vision ICE, vision probe, bdi2000, trace32(Lauterbach) etc), ROM Writer, Vision Click, Single Step Debugger, GDB(DDD), Ethereal(wireshark), WinCVS, SVN, Bug tracking tool, Source insight, Vi Editor, Diab Data/GNU tool chain/MicroTec Compiler , Visual basic , Signal generator, power meter, Oscilloscope, logic analyzer,  Shell scripter, QPST/QXDM, CCS, IAR, GCC

 

· BSM and EMS

Knowledge and experience for SNMP agent and Knowledge of ACS(tr069) networking.

 

· Wireless Communication system

Knowledge and experience for WCDMA, CDMA, LTE Architecture, WIFI and RF Calibration

 

· LAN and TCP/IP protocol

Knowledge and experience for L2/L3(router) switch, Core network, HTTP communication programming, TCP/IP Socket  communication, Knowledge of CAN communication (4 wires)

 

· Programming Language :  C/C++,  Assembly, Visual basic and shell scripting language[Bash] a knowledge of Python.

 

· Device Driver : DMA, Serial(UART:RS232/485), I2C, SPI, Ethernet, SAR chip, E1 chip, DS3 chip, STM-1 chip , OAM chip, UPC chip, Ethernet Switch chip, ADSL/SHDSL/VDSL chip, Timer chip, PCI chip device, CDMA Modem chipset(CSM5000, CSM6800), PUC, PDC, PLL chipset, RF chipset ,WCDMA Modem chipset( Picochip(PC312), Percello, FreeScale(PSC9131)) etc.

· RTOS: Deep Knowledge and experience for Stand-Alone RTOS(kernel and Device driver) and Windows : VERTX, XINU, pSOS, VxWorks, MontaVista Linux, TI-RTOS and Interested in Android.

 

· CPU: Deep Knowledge and experience for embedded microprocessors(8/16/32bit) :Atmel AVR, MPC860, MC68040, MC68331, RV4640(RISC), MPC8260(RISC), MPC750, MPC8247. MPC8245, MPC 8347, MPC8270, MPC8540(Freescale), ARM7/11, MIPS(RISC), CC3200(ARM Cortex-M4)), 8051(Intel microcontroller).

 

· Hardware : Deep Knowledge and  Read/Analysis a Circuit board  Schematic and BOM. Hands on a RF calibration