Download PPT

An Implementation of the Broadband
Home Gateway supporting MultiChannel 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
2017/5/25
1
Outline
Introduction
 Related Works
 System Architecture and Implementation
 Test Scenario and Results
 Conclusion
 心得

2017/5/25
2
Introduction
Consumers increasing demands and home
network trend
 IP address and NAT
 IPTV
 IGMP and IGMP snooping
 Architecture and superiority

2017/5/25
3
Related Works
Network and System for Digital Home
Services
 IPTV(Internet Protocol Television)
 IGMP and IGMP snooping

2017/5/25
4
Network and System for Digital
Home Services

Fiber to the Home(FTTH) network

Ethernet Passive Optical Network(EPON)

Adequate network bandwidth
2017/5/25
5
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。
資料來源： http://www.eettaiwan.com
2017/5/25
6
Network and System for Digital
Home Services

Connected to exterior public network
throughout a home gateway system.

HG has powerful processing power and
enough network bandwidth to provide
above networking service.
2017/5/25
7
Network and System for Digital
Home Services
分流
2017/5/25
8
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。
2017/5/25
9
補充：NAT(Network Address Translation)
來源http://turtle.ee.ncku.edu.tw/~tung/nat/nat.htm
2017/5/25
10
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.
2017/5/25
11
Network and System for Digital
Home Services
2017/5/25
12
IGMP and IGMP snooping

manage 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.
2017/5/25
13
補充：獨立多點傳送-稀疏模式路由協定 (PIMSM, 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。
2017/5/25
14
IGMP and IGMP snooping
PIM-SM(Protocol Independent Multicast - Sparse Mode)
2017/5/25
15
IGMP and IGMP snooping

manage the channel registration and
release
◦ Membership Query
◦ Membership Report
◦ Leave Group messages
2017/5/25
16
System Architecture and Implementation
System Architecture
 Data and Control Packet
 Driver and Software Implementation
 Implemented System

2017/5/25
17
System Architecture
2017/5/25
18
System Architecture-function and roles
2017/5/25
19
Data and Control Packet
2017/5/25
20
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.
2017/5/25
21
Driver and Software Implementation
2017/5/25
22
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.
2017/5/25
23
Driver and Software Implementation
2017/5/25
24
Implemented System
2017/5/25
25
Test Scenario and Results
2017/5/25
26
Test Scenario and Results
2017/5/25
27
Conclusion

An implementation results for home
gateway supporting multi-channel, more
that three channel, HD class IPTV service.

HG system can provide various digital
home service.
2017/5/25
28
心得
Cost
 Performance and pressure test

◦ 1000Mbps/20Mbps = 50 channel

Power consumption and environment
2017/5/25
29