Weon-Yong Joo Korea Telecom Access Network Lab.

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Presentation transcript:

2001. 4 Weon-Yong Joo Korea Telecom Access Network Lab. 블루투스란 무엇인가 ? 2001. 4 Weon-Yong Joo Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. 목 차 Overview Protocols Profiles Applications Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Overview Bluetooth 란? 근거리 점-대-다점 음성/데이터 전송을 위해 제안된 무선(Radio Frequency) 규격 Bluetooth 특징 근거리 통신 : 0.1 ~ 10m 비허가 주파수 대역 저전력 : 1mW 소형 : 9mm x 9mm 칩에 실장 저가격 : 5$ 이하 케이블 대체 다양한 응용 서비스 10미터 내의 거리에서 장치 사이에 라디오 주파수를 이용하여 통신할 수 있게 해준다. 국제적으로 무료로 사용 가능한 ISM대역인 2.4GHz에서 동작하기 때문에 세계 어디서나 사용 가능하다. 단거리 통신이기 때문에 수신기는 저전력에서 동작할 수 있다. 장치들 사이를 연결하는 케이블을 대체 Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Overview Bluetooth 연결장치 Internet LAN Access Point (((( )))) Shopping center etc. Instant postcard Alarm & Mail view Data synchronize Weather info. Local area broadcast Health care Data down road Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Overview Bluetooth SIG(Special Interest Group) Promoter Companies Ericsson, Nokia, Intel, IBM, Toshiba (1998년5월) 3Com, Lucent, Motorola, MicroSoft (1999년12월) Adopter/Associate Members (2001년4월) 2100여개 업체 Bluetooth 표준 세계적인 공개 표준 1999년7월 - Bluetooth 1.0b specification High Bandwidth Mode Bluetooth 2001년말 발표예정 7 ~ 12 Mbps Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Overview Bluetooth 무선 구조 사용주파수 대역 : 2.4GHz ISM band 소모전력 : 1mW(class 3) 전송범위 : 0.1 ~ 10m(class 3) 듀플렉스 방식 : TDD(Time Division Duplex) 대역확산 방식 : FH(Frequency Hopping) 무선링크 특징 짧은 패킷 : 최대 Payload 2745bits 빠른 호핑 : 1초에 1600번 하나의 물리적채널을 Master와 Slave가 공유하는 구조 Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Overview Power Class Class 1 : 100mW(20dBm) - 100 m with power control Class 2 : 2.5mW(4dBm), - 20m with power control Class 3 : 1mW(0dBm), - 10 m no power control Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Overview FH/TDD 채널 625 ms t master slave f(2k) f(2k+1) f(2k+2) Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Overview Bluetooth 채널 구조 음성채널(3개)와 데이터채널(1개) 모두 지원 SCO link(Synchronous Connection Oriented) 회선교환(재전송 안함) 대칭, 동기 서비스 ACL link(Asynchronous Connectionless) 패킷교환(에러시 재전송) 대칭/비대칭 비동기 서비스 1 슬롯당 1패킷 (최대 5슬롯 점유) 패킷 구조 access code packet header payload 72b 54b 0-2745b Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Overview Multi-Slot Packet 625 ms f(k) f(k+1) f(k+2) f(k+3) f(k+4) f(k+5) Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Overview Bluetooth 전송 속도 음성 변조 : log PCM 또는 CVSD (Continuous Variable Slope Delta Modulation) 최대 속도 : 1Mbit/s 음성 속도 : 64Kbit/s (양방향 음성통신) 데이터 속도 비대칭 채널: (한 방향)721Kbit/s + (다른 방향)57.7Kbit/s 대칭 채널: 432.6Kbit/s Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Overview Bluetooth 동작 1개 마스터 + 7개 슬레이브 Piconet : 최대 8개 유닛 Scatternet : 2개 이상의 Piconet이 연결 Link 제어 : Standby, Inquiry, Page, Connection state 48bits Bluetooth Device Address(IEEE 802 Standard) 인증 및 암호화 지원 동작 모드 : Active, Hold, Sniff, Park mode Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Overview Piconet & Scatternet Piconet b Piconet a Slave 3 Slave 5 Slave 1 Master b Master a Slave 4 Slave 6 Slave 2 Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Overview 동작 모드 active slave master parked slave standby Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Overview State Flow Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Overview Bluetooth 구조 RF Baseband Audio Link Manager L2CAP TCS SDP RFCOMM Applications Data Control S/W H/W Korea Telecom Access Network Lab.

Protocol Protocol Structure Baseband Bluetooth Radio LMP L2CAP Host Controller Interface RFCOMM PPP IP UDP TCP OBEX vCard/vCal WAP WAE TCS - AT Command TCS BIN SDP Audio Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Protocol Core Protocol Baseband LMP(Link Manager Protocol) L2CAP(Logical Link Control and Adaptation Protocol) SDP(Service Discovery Protocol) Cable Replacement Protocol : RFCOMM Telephony Control Protocol TCS BIN(Telephony Control Binary) TCS-AT command Adopted Protocol PPP TCP/UDP/IP OBEX WAP Profiles : combination of protocols Cordless Phone, LAN Access Profile 등 13개 Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Protocol Baseband Physical Channel Physical Links Packets Error Correction Channel Control Hop selection Bluetooth Audio Bluetooth Addressing Bluetooth Security Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Protocol Baseband Channel Control Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Protocol LMP(Link Manager Protocol) Setup & Management of Baseband Connection Piconet management Link configuration Security function Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Protocol L2CAP(Logical Link Control and Adaptation Protocol) Protocol Multiplexing Segmentation/Reassembly Quality of Service Groups Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Protocol SDP(Service Discovery Protocol) Client Server Model : server - list of service records to enable Interoperability highly dynamic, device-based Korea Telecom Access Network Lab.

Host Drives and Applications Protocol HCI (Host Controller Interface) HCI Bluetooth Host Bluetooth Module HCI Transport Firmware Host Drives and Applications Bluetooth HCI Transport driver (USB, PC Card, PCI) Transport Bus Bluetooth HCI driver Bluetooth Host Controller Link Manager Bluetooth Radio Bluetooth Baseband Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Profile Protocol 과 Profile Profiles Protocols Applications Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Profile Bluetooth Profile Generic Access Profile Service Discovery Application Profile TCS-BIN-based Profiles Cordless Phone Profile Intercom Profile Serial Port Profile Dial-up Networking Fax Profile Generic Object Exchange Headset Profile LAN Access Profile File Transfer Object Push Profile Synchronization Korea Telecom Access Network Lab.

Profile LAN Access Profile L2CAP RFCOMM SDP PPP IP LAN Access application Korea Telecom Access Network Lab.

Cordless Phone Profile L2CAP SDP TCS BIN Cordless Phone or Basestation application Audio Korea Telecom Access Network Lab.

Profile Headset Profile L2CAP SDP AT-command HS gateway or Headset application Audio RFCOMM Korea Telecom Access Network Lab.

Profile File Transfer Profile File Transfer application OBEX SDP L2CAP RFCOMM SDP OBEX File Transfer application Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Applications Bluetooth 적용 분야(1) 피코넷 응용 Peer to Peer 데이터 통신 피코넷 대 LAN PDA 동기화 휴대폰 동기화 음성 무선링크 Headset 연결 음성 명령 보안 및 감시 Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Applications Bluetooth 적용 분야(2) 텔레마틱스 기계 대 기계 원격 제어 : 자동차키, 차고문, 보안등 인포마틱스 박물관/박람회 멀티미디어/엔터테인먼트 비디오 게임 극장 Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Applications Bluetooth 응용 서비스(1) 유.무선 통합 서비스 (HomeBluetooth 서비스) Cordless Phone 서비스 인터넷 접속 서비스 홈 환경 서비스 보안 및 출입통제 서비스 조명 및 난방 제어 서비스 조리 서비스 가족 통신 서비스 음악 및 오락 서비스 Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Applications Bluetooth 응용 서비스(2) 업무 응용 서비스 PC to LAN 서비스 POS 연결 서비스 신용카드 연결 서비스 출입통제 서비스 엔터테인먼트 서비스 비디오, TV, 음악 채널 서비스 공연장, 박람회 방송 서비스 프로그램 표시 서비스 지도, 사용법, 방문객 안내 서비스 식당 메뉴 서비스 Korea Telecom Access Network Lab.

Korea Telecom Access Network Lab. Applications Bluetooth 응용 서비스(3) 여행 서비스 출발/도착 스케줄 서비스 예약 및 변경 서비스 전자 티켓 서비스 미래 서비스 슈퍼마켓 쇼핑 서비스 전자 주방 서비스 군사분야 야전 시스템 차내 명령 무기 제어 Korea Telecom Access Network Lab.