Resume

Robin (Hai Nam) Cho

             

Name : Hai-Nam Cho

Current Address : 12425 highland Dr. Tustin CA 92782

Email : robinhncho@yahoo.com , robinhncho@gmail.com  (CP ) 714-222-9855

 

Summary of Skills:

-Implemented OMADM client to update the system and modem parameters(Apn,IMS,LTE) over Android Framework and LTE/WCDMA data network

 

- Implemented FOTA Client to update the system and kernel image of Android Operating System and modem(LTE,WCDMA) software

 

- Implemented device drivers (LCD, USB2.0,GPIO,I2C,UART, NAND flash,eMMC) and Run time library in RTOS (Linux ,OS-9, VRTX, REX ,WinMobile )

 

- Have experience implemented Java Media (J2ME), HTTP,HTTPS,XML,SyncML parser and integrated Web Browser into the mobile device

 

- Have extensive experience with embedded operating systems, preferably ARM(7,9,11) Cortex processor based systems, and strong software development debugging skill(T32 Jtag)

and debugging power management to improve the power consumption

 

-Have development and integration experience for the OEM features based on 3GPP and 3GPP2 standards

 

-Have Extensive Knowledge for HTTP,XML,SyncML,SSL/Socket/TCP/UDP/IP/PPP protocol, Mobile IP and 3GPP(LTE,WCDMA,GSM) ,3GPP2(EVDO,CDMA) standards

 

- Have Extensive Knowledge for C, C++ and Arm assemble and Perl and Java and Python language.

 

- Have strong skill for image processing and experience implemented device driver for MPEG1 and MPEG2 image decoder based on RTOS OS-9

 

-Have experience implemented MPEG1.2 device drivers working with a team to develop Video on Demand ,Set Top Box and Telematic products

 

- Have experience implemented the features and developed the products supporting Verizon, Sprint ,AT&T and T-Mobile requirements

 

- Have an experience developed a product and expanded QMI over Qualcomm chipsets like MSM6265, MSM7627, MDM8200, MDM9600,MSM8960

Employment:

03/2012 ~ 12/2013: Principal software Engineer Broadcom Corporation.

Address 16340 West Bernardo Drive San Diego CA 92127

- Create the document to design the OMADM/FOTA clients over Android platform

- Implemented OMADM application to update the Android system and modem parameters(Apn,IMS,LTE) over LTE and WCDMA network

- Implemented FOTA Client to update the system and kernel image of Android Operating System and modem firmware

- Added the audio function to Android device driver(ALSA) in order to capture the PCM injection signal by loopback on Android system

- Added the function to audio device driver to measure the audio power consumption of VoLTE

 

12/2010 ~ 03/2012 : Senior Staff Software Engineer. Huawei Device Inc.

Address:10180 Telesis Court, Suite 165, San Diego CA 92121

- Debug and optimize Telephonylayer, Power management and the stability for Android Tablet and Smartphone device

- Optimize the bootup, system determination and data throughput(protocol) of Android Smartphone over LTE and WCDMA wireless network

- Debug and analysis of complex issues at the hardware / software interface layer

 

07/2008 ~ 12/2010 : Staff software Engineer. Novatel Wireless Inc.

Address: 9645 Scranton Road Suite #205 San Diego CA 92121

-Implemented WAP Push Parser, OTADM ,OTACP and FOTA clients for Verizon LTE(MDM9600) device

-Implemented WAP push Parser, OMADM/OMACP/OMADL client and FOTA client of 1xEVDO and WCDMA(HSDPA/HSUPA) device for Sprint and Bell Mobility

-Added and implemented OEM specific AT/Diag commands and its functions to support Vendor specific features

-Implemented USB2.0 device driver and middle layer function to design the high speed (QMI) data card.

-Optimized data throughput of HSPA+

 

01//2007 ~ 06/2008: Senior Software Engineer. Palm Inc.

Address: 950 W Maude Av, Sunnyvale CA 94085

- Power Management

-Implemented Device Drivers(GPIO, UART and USB2.0),

-Designed the handshake protocol to transfer the data between Host(Palm OS and Win Mobile) and CDMA module(Client) for the Smartphone.

 

12/01/2002 to 11/08/2006 : Senior Staff Software Engineer. Pantech Wireless Inc.

Address : 11240 Warland Drive, Cypress CA 90630

Sprint :

- Implemented WAP2.0, IOTA client and FOTA download client based on Access and

Web Browser

- Implemented LCD driver and Java OEM layer for Disney Mobile CDMA handset

- Designed and implemented software architecture for Access Browser

- Debugged 1X /EVDO CDMA wireless data protocol and USB/UART driver

Verizon :

- Designed software architecture for MMS

- Implemented device integration layer(HAL), and integrating WAP2.0 and WAP 1.2 Browser into the cell phone

- Debugged 1X CDMA wireless data protocol and USB/UART driver

 

3/2001 to 11/2002  : Software engineer Cyberlane INC. 

Address : 10908 Technology place Suit 100 San Diego, CA 92127

-Designed mobile shop application based on Brew

-Completed GPS test based on handset applied MSM5100

-Java Porting experience based on MSM5105 chip set

- Implemented IOTA client based on IS-683A and WAP Browser

- Implemented packet and circuit protocol based on CDMA 1xRTT Spec.

- Integrated UP browser 4.1 to the cell phone

- Completed field and CDG2 test for data service with products applied MSM5100 and MSM5105

 

6 /2000 to 2/2001 : Software Engineer LG Telecom Ltd.

Address : 826-20 Yoksam-dong, Kangnam-gu, Seoul 135-935 Korea

- Designed End to End security protocol for WAP browser.

- Implemented End-to-End security for up browser with phone.com

- Porting UP browser 4.1

- Implemented packet and circuit protocol based on CDMA 1x RTT Spec.

 

04/1990 to 05/2000:  Software Engineer, LG Electronics Ltd. Seoul Korea.

Address : 679 Yeoksam-dong Kangnam-gu 679-1 Seoul Korea

- Working with a team to develop CDMA Smart Phone

- Ported WAP Browser and its Korean language driver

- Implemented POP3 and SMTP to support email in CDMA Smart phone

- Developed wireless data communication (circuit and packet: IS-707)

- Developed OTA and Melody Downloading based on OTA

- Developed Protocol stack to service cyber stock by using CDMA smart phone

- Implemented the pen input device driver and UP browser for Smart Phone

    based on touch screen (Model LGI 3000w was provided to Sprint PCS).

    It can use the UP browser to the case of flip Off and On

- Developed wireless data communication (circuit and packet: IS-707, IS-707A)

-Developed Protocol stack based on OSI 7 Layers working with a team to develop ISDN terminal

* Transports, Session and Presentation Layer

- Implemented MPEG1.2 device drivers working with a team to develop Video on Demand Product(Set Top Box,Telematic)

- Implemented CDPD protocol stack and WinCE Serial driver working with a team to develop Hand Handle PC

* SNDCP Layer

- Wrote C code under Win95/WinNT

Education:

- M.S: KwangWoon University

- B.S: KwangWoon University Seoul Korea.

       Major:  Electronic Telecommunication Engineering

Address : 447-1 Wolgye-dong, Nowon-gu Seoul Korea 139-701