thuraya sg 2510

링크나우 프로필 - 변광호 APSI 주임연구원 변광호 APSI 주임연구원 인맥 : 14명 추천 받은 횟수 : 2번 산업분류 : 전기전자 제조 변광호님이 누구인지 자세히 보시겠습니까? 변광호님과 연락하려면 여기를 눌러주세요. 자기소개 APSI 주임연구원 I am a architect to delvelop protocol stack for various wireless tech. including GSM,GMR,TETRA, IEEE, IETF. I had been working to develop data/fax and gmprs protocol stack for GSM and GMR so I have good understanding and knowledge of standard for second and third generation of mobile data communication and also have good skill for C language and RTOS through development using C and target exporting to Vxworks. 전문영역 GSM/GMR/GMPRS/TETRA Protocol Stack(Layer 2:MAC) 보유기술 및 자격사항 ETSI GSM, GMR, GMPRS, TETRAIEEE 802.11IETF IPv6, MIPv6SDL SUIT,TTCN,GNU C,Vxworks,Tornado,T32-J tag,MCP,정보처리기사,사무자동화, 경력 아태위성산업, 주임연구원 ( 2005.01 ~ 현재, 전기전자 제조, 사기업, 직원수 51-200명 ) Executive SummaryProfessional experience for 3years & 1months in assistant engineer of Digital Algorithm2 team. at Asia Pacific Satellite Industry LtdJan. 2005 ~ Present Working as assistant engineer for Second-Generation User Terminal project and TETRA Terminal ProjectDec. 2006 ~ Present TETRA Terminal Project-To analyze specification, standard and technical report for ETSI TETRA ETSI EN 300 392-2 Terrestrial Trunked Radio (TETRA) Voice plus Data (V+D) Part 2: Air Interface (AI)-To write document of Low Level Design(LLD), High Level Design(HLD) and SRD(System Requirement Document).-To architect MAC layer S/W for TETRA terminal using SDL SUIT.-To develop MAC layer protocol stack S/W for TETRA terminal.Also have good understanding entire function of MAC including Power control, Cell selection(measure the signal strength RSSI) and so on. MLTE(MAC Layer Transmit Entity)Random access based on the slotted ALOHA- To decode broadcast message for access parameter.- To calculate access attempt opportunity.- To count access opportunity.- To retry to send access message.- To abandon random access.Reserved access management- To manage the capacity requirement.- To control basic slot grant.- To use reserved slot.- To revert random access.- To count grant-delay to attempt reserved access.Channel allocation- To transmit on allocated channel(DQPSK, D8PSK, QAM).- To control channel change timing.Maintenance assigned channel- To leave assigned channel.- To check ACCESS ASSIGN PDU.- To control timer on assigned channel.Stealing on Traffic Channel- To switch Data/Voice. - To transmit signaling on ACCH(FACCH, SACCH).Link adaptation- To decode and encode L2 signaling PDU.- To control timing of L2 signaling.Fragmentation and Association- To make fragmentation message of TM-SDU to convert MAC block.- To manage buffer for transmission and reception.- To drive basic operation for fragmentation- To send fragmentation on ACCHPDU encoding- To encode PDU for each accessJan. 2005 ~ Nov. 2006 THURAYA Second-Generation User Terminal projectProduct: SO-2510, SG-2520, SM-2500(http://thuraya.com)GSM/GMR circuit Data/Fax -To analyze specification and standard including ETSI GSM and GMR Data/Fax.-To develop Data/Fax protocol stack S/W for digital radio and switching technology, including TDMA, GSM, GMR-, GMPRS ITU-T T.4 Standard of Group3 Facsimile. ITU-T T.30 Procedure for Doc. Facsimile Transmission in the General Switched Telephone Network GSM 04.21 Rate adaptation on MS-BSS interface. GSM 04.22 Radio Link Protocol for Data Service on MS-BS interface. GMS 07.01 General on Terminal Adaptation Function for MS. GSM 07.02 Terminal Adaptation Function for Service asynchronous bearer capability. GSM 07.03 Terminal Adaptation Function for Service using synchronous bearer capability.-To verify and test call process of Protocol Stack.-To review and plan for Factory Acceptance and Provisional Acceptance test.-To evaluate the performance of Data/Fax.GMPRS RLC/MAC -To analyze specification and standard including ETSI GMPRS-To develop RLC/MAC protocol stack GMPRSManage multiplexing scheme- To manage TBF(Temporary Block Flow) and USF(Uplink State Flag).- To manage state for Packet communication : packet idle, packet transfer mode.- To control logical channel for Packet transfer: PRACH, PCCCH(PAGCH, PACCH), PTCCH/D, PTCCH/U and PDTCH.RLC function- To make segmentation to convert LLC PDU to RLC data block for uplink direction.- To check BEC(Backward Error Correction) procedure for RLC block to repeat transmission.- To re assemble of LLC PDU form RLC data block for downlink direction.- To control acknowledge mode for RLC data block transmission.Also have good knowledge NAS(None Access Stratum for UMTS including RR,MM,CC) for example, call set-up process for voice, data and fax call.OA Skill: Excellent in MS Office (Word, Excel, and Power Point)Certification: MCP(Microsoft), Technical Skill -CPU: ARM9 OMAP1510. -OS and BSP: Vxworks, Tornado 2.0. -Language and Compiler: GNU C(Cygwin). -Tool: Telelogic SDL SUIT, TTCN, MDS Trace32.Training & Visit to Overseas-Training for porting and integration of the protocol Stack in Germany. (2005)-Factory and Provisional Acceptance Test in UAE. (2005. 8 ~ 2006. 11)-Factory and Provisional Acceptance Test in Norway. (2006) 학력 숭실대학교 (2003 ~ 2005, Master's degree, Dept. Computer ) Summary of Master CourseThorough knowledge of Mobility support for Internet devices, protocol design and development as well as an understanding of the evaluation of the performance and the interoperability related to IEEE 802.11 MAC and IETF Mobile IP. Successful record of computer engineering in both graduate and undergraduate levels in a variety of technology.Project of Master Course-Study on Network Software for Ubiquitous Digital Broadcast, MINISTRY OF INFORMATION AND COMMUNICATION OF REPUBLIC KOREA, 2003.08~2004.07-Study on Multicast communication for CDN(Contents Delivery Networks), KOREA SCIENCE AND ENGINEERING FOUNDATION, 2003.03~2004.08-Development of the Honey-pot System, ITRC, 2003.07~2005.01-Study on Security advanced Layer2 Handoff scheme on Mobile IPv6 for Wibro, MINISTRY OF INFORMATION AND COMMUNICATION OF REPUBLIC KOREA, 2003.08~2004.07Publications-*Kwangho Byun, “Handoff Performance Improvement Scheme for Fast Mobile IPv6 over IEEE 802.11 Wireless LAN”, Masters thesis of Soong-sil University, 2005.02-*Kwangho Byun, Youngsong Mun, “A Study on the Performance Improvement of AAA in Mobile IPv6 using Fast Handoff for Differentiated Services”, proceeding of Korea Information Processing Society, 2004.05-*Miyoung Kim, **Kwangho Byun, Youngsong Mun, “Dynamic SA establishment for Mobile IPv6 Node Bootstrapping based on AAA”, proceeding of Korea Society for Internet Information, 2004.05-*Kwangho Byun, Youngsong Mun, “Security advanced AAA scheme in the Mobile IPv6 for Differentiated Services”, proceeding of Korea Society for Internet Information, 2003.11 추천받은 내역 GSM/GMR/GMPRS/TETRA Protocol Stack 전문가 - 2008년 02월 18일 추천자: 장재수,한국토지공사 연구원 (나는 변광호와 같은 그룹에서 동료로 일했다.) 위성통신과 GSM의 전문가 - 2008년 02월 18일 추천자: 임형민,파주시청 u-City 전문위원 (나는 변광호와 일해보았지만, 같은 회사는 아니었다.) 추가 정보 취미 사진촬영,창업아이템,재테크, 그룹 및 협회 가입사항 ETSI TETRA MOU 수상경력 N/A 기타 관심사 내 회사에서 함께 일할 사람을 찾는다. 내 회사와 거래할 상대를 찾는다. 소식이 끊겼던 친구나 동료와 연결하고 싶다. 새로운 일에 도전해보고 싶다. 전문가의 컨설팅을 받고 싶다. 추천서를 받고 싶다. 일자리를 찾는다. sharp ar-5415 5004.13 () icq -134 .- funke mobil gargoyle russia music awards thuraya sg 2510