An Implementation of the Broadband Home Gateway supporting Multi-Channel IPTV Service

國立屏東科技大學 資訊管理系指導教授：童曉儒 教授報告人：張益瑞學號： M9756003

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OutlineIntroductionRelated WorksSystem Architecture and ImplementationTest Scenario and ResultsConclusion心得

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IntroductionConsumers increasing demands and home

network trendIP address and NATIPTVIGMP and IGMP snoopingArchitecture and superiority

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Related WorksNetwork and System for Digital Home

ServicesIPTV(Internet Protocol Television)IGMP and IGMP snooping

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Network and System for Digital Home ServicesFiber to the Home(FTTH) network

Ethernet Passive Optical Network(EPON)

Adequate network bandwidth

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補充： EPON基於乙太網路的被動光纖網路 (EPON) 是一個點到多點的光接取網路，提供可靠的數據、語音以及視訊服務，在最長 10km 上傳送速率可以達 1,000Mbps 。

112/04/21 6資料來源： http://www.eettaiwan.com

Network and System for Digital Home ServicesConnected to exterior public network

throughout a home gateway system.

HG has powerful processing power and enough network bandwidth to provide above networking service.

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Network and System for Digital Home Services

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分流

補充： NAT(Network Address Translation)

網路位址轉譯器： NAT 可以讓很多台電腦只用很少的 Public IP Address 就能夠連上 Internet 。

使用 NAT mapping table 維持對應關係。

節省 Public IP Address 。

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補充： NAT(Network Address Translation)

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來源 http://turtle.ee.ncku.edu.tw/~tung/nat/nat.htm

IPTV(Internet Protocol Television)

IPTV is delivered to consumers using the Internet Protocol over a broadband connection.

Video content is typically MPEG2 delivered with IP multicast.

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Network and System for Digital Home Services

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IGMP and IGMP snoopingmanage the channel registration and

release to provide IPTV service.

IGMP proxy function: a role as IGMP clients in the view of LHR and as a multicast router in the side of IPTV clients.

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補充：獨立多點傳送 - 稀疏模式路由協定  (PIM-SM, Protocol Independent Multicast - Sparse Mode)優點： PIM-SM 採用共享樹進行群播封包轉發。每一個組有一個匯合點（ Rendezvous Point: RP ），群播源沿最短路徑向 RP 發送封包，再由 RP 沿最短路徑將封包發送到各個接收端。

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IGMP and IGMP snooping

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PIM-SM(Protocol Independent Multicast - Sparse Mode)

IGMP and IGMP snoopingmanage the channel registration and

release◦Membership Query◦Membership Report◦Leave Group messages

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System Architecture and ImplementationSystem ArchitectureData and Control PacketDriver and Software ImplementationImplemented System

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System Architecture

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System Architecture-function and roles

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Data and Control Packet

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Driver and Software Implementation

IGMP proxy function ◦instead of multicasting protocol to register and

release the multicast membership.◦receive and transmit the IGMP messages on

behalf of IP STB.

IGMP snooping function◦reduce the processor’s work load in proposed

home gateway.

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Driver and Software Implementation

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Driver and Software Implementation

IGMP Snooping Manager◦prevent the multicast packet to forward to

undesirable ports.

◦reduce the CPU’s work load with forwarding directly to the specific hosts without forwarding to the processor.

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Driver and Software Implementation

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Implemented System

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Test Scenario and Results

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Test Scenario and Results

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ConclusionAn implementation results for home

gateway supporting multi-channel, more that three channel, HD class IPTV service.

HG system can provide various digital home service.

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心得CostPerformance and pressure test◦1000Mbps/20Mbps = 50 channel

Power consumption and environment

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