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客製化 H.323 協定之智慧型網路電話監控與錄音系統之研製

Adviser : Kai-wei Ke

Speaker : Chia-Jui Tsai

Intelligent monitoring and recording system implementation for Customized H.323-based Internet phone

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Outline

Introduction Background

Standard H.323 Customized H.323

Intelligent monitoring and recording system System Environment of Network System function block Classification of packet

DEMO Conclusion and Futures Works

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Introduction

VoIP is the popular application of the Internet Therefore , requirement of the audio recording system

growing day by day

VoIP protocol H.323 SIP(Session Initiation Protocol)

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Outline

Introduction Background

Standard H.323 Customized H.323

Intelligent monitoring and recording system System Environment of Network System function Classification of packet

DEMO Conclusion and Futures Works

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About Standard H.323

H.323 is a multimedia conferencing protocol, which includes audio, video, and data conferencing over packet-switched networks The first version published by the ITU in November 1996 The current version of H.323, commonly referred to as "H.323v6", was published

in 2006

Elements of an H.323 System Terminals Gatekeeper Multipoint Control Units (MCU) Gateway

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H.323 Network Structure

Not H323 network

Not H323 network

Intranet

Voice &Video port

Router

MCU

Voice port

Router

H.323 Terminal

GateKeeper

H.323 Gateway

GateKeeper

H.323 Gateway

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H.323 Protocol Stack

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Standard H.323 Call Flow Chart

GateKeeper

ARQ(alias address/bandwidth)

2. ACF(call signaling channel address/bandwidth)

5. ARQ 6. ACF

1. ARQ(alias address/bandwidth)

3. Setup(Involve IP address, H.225 port NO. call_type, Country Code)

4. Call Proceeding(Involve , call_ref, Conntry code)

7. Alerting

8. Connect(Involve H.245 port number)

11. Open logical Channel request(Channel Number, media_data)

9. Terminal Capability Set

10. Master Slave Determination

12. Open Logical Channel Ack(Involve RTP&RTCP port number)

RTP & RTCP Stream

13. Release Complete

14. End Session Command

H.245 Control Channel (Logical Channel)

Q.931 H.225 Call Signaling Channel

Phone A

Phone B

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About Customized H.323

What is customized H.323 ? 部份的 H.323 終端設備製造商為了賺取更高的利潤而藉由更改

H.323 的標準 , 使他們的產品差異化 , 藉此提供 Standard H.323所沒有的額外加值服務

What different about standard and customized H.323? Call Signal Call Flow

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Customized H.323 Call Flow Chart

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Register flow Detail

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Call flow Detail

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Call flow Detail (Cont.)

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Outline

Introduction Background

Standard H.323 Customized H.323

Intelligent monitoring and recording system System Environment of Network System function block Classification of packet

DEMO Conclusion and Futures Works

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System Environment of Network

Intranet

企業內部乙太網路

PDASmart Phone

網路電話 桌上型電腦網路軟體電話

Switch

無線網路電話

IP RecorderMain Server

+GateKeeper

Wirless Network

IP PBX

IP RecorderSlave Server

IP RecorderSlave Server

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System function block

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Classification of packet

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Outline

Introduction Background

Standard H.323 Customized H.323

Intelligent monitoring and recording system System Environment of Network System function block Classification of packet DEMO

Conclusion and Futures Works

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DEMO

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Conclusion and Futures Works

Conclusions Custom H.323 Signal 分析 通話狀態追蹤 聲音還原品質

Futures Works 影像的錄製與還原 聲紋辨識

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Reference

【 1 】 Hong Liu and Petros Mouchtaris, “ Voice over IP Signaling:H.323 and Beyond”, IEEE Communications Magazine, pp.142-148, October 2000

【 2 】“ Understanding H.323 Gatekeepers” from Cisco,Document ID:5244 【 3 】黃威穎，“ H.323 網路電話音訊監控與錄製系統之研製”，國立台北科技大學

資訊工程研究所， 2008 ，七月 【 4 】曾致皓，“ H.323 網路電話視訊監控與錄製系統之研製”，國立台北科技大學

資訊工程研究所， 2008 ，七月