RTP.ppt

Real-Time Transport Protocol (RTP) Tung Dao Manh Future Internet Class, 2007.04.15 1

Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],2

Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Motivation 8

Introduction ,[object Object],Motivation 8

Introduction Real-time data transport at glance 8 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],RTP Outline 8

RTP ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],8 Fundamental design philosophies of RTP

RTP ,[object Object],[object Object],[object Object],[object Object],8 Standard elements of RTP Framework

Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],RTP Outline 8 Media Application RTP IP RTCP UDP

Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],RTP Outline 8

RTP ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],8 RTP Features

RTP ,[object Object],[object Object],[object Object],[object Object],[object Object],8 RTP Packet Format 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | V=2 | P | X | CC | M | PT | sequence number | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | timestamp | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | synchronization source (SSRC) identifier | +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ | contributing source (CSRC) identifiers | | (0~15 items).... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Header extension (optional) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Payload (real time data) | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ,[object Object],[object Object],[object Object],[object Object],[object Object],Padding size (8 bits) Padding (size X 8 bits)

RTP 8 RTP header ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

RTP 8 RTP header: SSRC and CSRC ,[object Object],[object Object],[object Object],[object Object]

RTP 8 RTP header: Timestamp ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

RTP 8 RTP header: Payload types ,[object Object],90000 AV MP2T (MPEG- II transport stream) 33 90000 V MPV (MPEG-I and MPEG II) 32 90000 V JPEG 26 8000 A PCMA (A-law G.711) 8 8000 A PCMU (mu-law G.711) 0 Clock rate Audio/Video (A/V) Encoding name Payload type

RTP ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],RTP-based networking application 8

RTP 8 RTP-based networking application ,[object Object],Application RTP Socket UDP IP Data Link Physical

RTP 8 RTP-based networking application ,[object Object],Application RTP UDP IP Data Link Physical Transport

RTCP 8 Introduction – RTP Control Protocol ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

RTCP 8 Introduction - Goals ,[object Object],RTCP QoS feedback Canonical Name Identify and keep track of participant Minimal session control information

RTCP 8 Packet Types Bye: End of session APP: Application specifics SDES: Source Description RR: Receive report SR: Sender report RTCP packet types

RTCP 8 Sender report (SR) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

RTCP 8 Receiver report (RR) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

RTCP 8 Round-trip delay estimation

RTCP 8 Intermedia synchronization

RTCP 8 SDES Packet Type ,[object Object],[object Object],[object Object],[object Object],[object Object]

RTCP 8 Analyzing sender and receiver reports ,[object Object],[object Object],[object Object]

RTP/RTCP 8 Other issues ,[object Object],[object Object],[object Object],[object Object],[object Object]

RTP/RTCP 8 Applications using RTP SIP, RTP ,Proprietary P2P protocol video, voicemail, phone in, phone out, multiparty calling, conference recording, text messaging, NAT traversal, video mail SightSpeed SIP (using TLS) and RTP (media) Video, file transfer, PC to phone, phone to PC Yahoo! Messenger SIP, RTP Video, voice, chat, text messaging, PC to Phone Windows Live Messenger SIP, STUN, RTP Address Book Integration, Daylite CRM Integration, Call Recording, IM, Conferencing, Mulitple Providers, Simple Setup, Call transfer, 5 lines iSoftPhone SIP, RTP Video, file transfer, PC to phone, phone to PC AOL instance messenger Protocols Capability Program

RTP/RTCP 8 Questions ,[object Object]

RTP.ppt

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RTP.ppt