Trend of Telecom Network 電信網路發展趨勢

Trend of Telecom Network 電信網路趨勢

Optical Networks 新興光纖傳輸技術

Optical Ring and ADM

Optical Network

Optical Network

Backbone Example

Backbone Example

Flat Network 扁平化網路

Broadband Access 寬頻接取網路

Voice Over IP

All-IP Networks

All-IP Networks Motivation

All-IP Networks Benefits

New Services 新型跨網路服務

Comparison of network Capability 網路能力比較

All IP Network

All IP Network

All IP Network

SIP, Soft Switches

Packet Voice Network Architecture

3GPP

IETF Standards

Beyond 3G

VoIP Quality Issues

How to reduce network delay?

Classification of Services 應用服務之分類

QoS Demands 應用服務之品質要求

Qos Issues

Open Programming Interface

All-IP vs. PSTN

New Complications

Feature Interactions

Evolution of Telecom 電信網路演進

Conventional Service Model 傳統電信網路之服務模型

IN Service Model 智慧型網路之服務模型

Conclusion

Untitled Document
Trend of Telecom Network 電信網路趨勢
Wed Mar 16 00:32:26 CST 2011

Untitled Document
Optical Networks 新興光纖傳輸技術
DWDM (Dense Wave Division Multiplexing)
   
在現有的管路基礎上，可大幅提高光纖之頻寬
Increasing bandwidth on current pipelines
   
頻寬之成本大幅下降
bandwidth cost decreasing
傳輸距離 (Transmission Distance)
 
新的光纖技術可傳數百公里而不需再放大 (can transmit several hundread km without repeaters)
   
傳統銅線只能傳送數公里 (copper wire can only transmit several km)
Wed Mar 16 00:32:27 CST 2011 Untitled Document
Optical Ring and ADM
Wed Mar 16 00:32:27 CST 2011 Untitled Document
Optical Network
Wed Mar 16 00:32:28 CST 2011 Untitled Document
Optical Network
Wed Mar 16 00:32:30 CST 2011 Untitled Document
Backbone Example
Wed Mar 16 00:32:30 CST 2011 Untitled Document
Backbone Example
 
North Ring
 
South Ring
Wed Mar 16 00:32:31 CST 2011 Untitled Document
Flat Network 扁平化網路
Network Class 接取網路 (Access) 交換機配置 (Switch) 管理 (Management)
傳統網路 (Conventional) 銅絞線 (Copper) 小而多 (small and many) 管理麻煩而費用高昂 (difficult and expensive)
新興網路 (Emergent) 光纖 (optical) 大而少 (large and few) 管理簡單費用較低 (Easy and low cost)
 
傳統電信網路 (Conventional Telecom Networks)
  
受制於電話與交換機間之距離限制，每個交換機所能涵蓋 範圍較小，必須使用許多交換機，管理麻煩而費用高昂
limited by the distance betweeen phone sets and siwtches, each switch can only cover a small area so that a network needs many switches to form the network. Therefore, the manegement is difficult and expensive.
 
新興電信網路 (Emergent Telecom Networks)
   
電話與交換機間之距離可達數百公里，每個交換機所能涵蓋 範圍可以很大，可以使用較少之大型交換機，管理費用較低，
The distance betweeen phone sets and siwtches can be as long as several hundread km, each switch can cover a large area so that a network needs fewer switches to form the network. Therefore, the manegement is easier and cheaper.
   
有利於話務量較少之新興業者 (good for new and small operators)
  
必須佈建 Access Nodes 到各地區，
將話務集中於光纖， 再轉送交換機進行交換
Need to use access nodes to concentrate customers and transfer traffic to switches
 
Access Node 扮演角色，類似行動電話網路之基地台
An access node acts like a Base Station in a cellular network
顛覆傳統 (Against Common Wisdom)
   
在花蓮市內互打電話，需連到台北，在台北相連(交換)
Two phones next to eacher other may be switched in a remote location
   
市內電話走的距離比長途電話長
a local call may travel longer than a long-distant call
Wed Mar 16 00:32:32 CST 2011 Untitled Document
Broadband Access 寬頻接取網路
 
寬頻接取網路是新興固網公司之成敗關鍵 (baordband access is the key to success)
   
市內電話之建設是獲取執照之條件 (local network is mandatary for operation licence)
   
傳統市內電話已無成長空間，必須搶佔寬頻接取市場 (Local phone market is alreay saturated, muct more to broadband access)
可用技術 (Available Technologies)
FTTB FTTC ADSLHFCLMDS
接取網路 Access Network
HFC Network
市場策略 (Market Strategy)
 
以FTTB/FTTC搶佔都會區商業客戶 (Use FTTB/FTTC to attract business customers)
Wed Mar 16 00:32:33 CST 2011 Untitled Document
Voice Over IP
VoIP over public Internet Quality unacceptable
VoIP over Private Internet (ISP) Controlled quality, limited functionality, Niche market
VoIP over Private Network (Telecom Operator) Full Functionality, Dominant market
第二類電信 ISP 經營網路電話之利基 (Niche of ISP on VoIP)
 
有效運用頻寬 (Efficient use of Bandwidth)
   
使用語音壓縮技術，減少頻寬需求 (Use compression to reduce bandwidth reuirement)
   
可針對實際需求租用頻寬 (On-demand bandwidth lease)
 
Bypass 普及服務義務 (BY pass USO)
第二類電信 ISP 經營網路電話之隱憂 (Problems of ISP on VoIP)
 
必須與第一類電信業者共同，承擔普及服務義務，
國際電話不再有鉅額利潤
Need to share USO and other public duty
 
只能提供基本電話服務，無法提供智慧型網路的服務機能
Basic services only, no advanced services such as IN
 
第一類電信業者正試圖運用 VoIP 技術，第二類業者將失去利基
Wed Mar 16 00:32:34 CST 2011 Untitled Document
All-IP Networks
Wed Mar 16 00:32:34 CST 2011 Untitled Document
All-IP Networks Motivation
Wed Mar 16 00:32:36 CST 2011 Untitled Document
All-IP Networks Benefits
Wed Mar 16 00:32:37 CST 2011 Untitled Document
New Services 新型跨網路服務
Wed Mar 16 00:32:38 CST 2011 Untitled Document
Comparison of network Capability 網路能力比較
Wed Mar 16 00:32:39 CST 2011 Untitled Document
All IP Network
Wed Mar 16 00:32:41 CST 2011 Untitled Document
All IP Network
Wed Mar 16 00:32:41 CST 2011 Untitled Document
All IP Network
Wed Mar 16 00:32:42 CST 2011 Untitled Document
SIP, Soft Switches
ALLIP
SIP
SoftSwitch
Wed Mar 16 00:32:43 CST 2011 Untitled Document
Packet Voice Network Architecture

Wed Mar 16 00:32:45 CST 2011 Untitled Document
3GPP
 
(Packet SW + Circuit SW ) * ( Fixed + Mobile )
Wed Mar 16 00:32:46 CST 2011 Untitled Document
IETF Standards
Wed Mar 16 00:32:48 CST 2011 Untitled Document
Beyond 3G
B3G Plan
Wed Mar 16 00:32:48 CST 2011 Untitled Document
VoIP Quality Issues
 
Quality parameters
DelayPacket LossJitter
 
Cause of Delay
accumulation delayprocessing delaynetwork delay
Reducing delay time is a key problem to VoIP
Wed Mar 16 00:32:49 CST 2011 Untitled Document
How to reduce network delay?
IP over ATM
 
Level 2 Switch, MPLS
IP over SDH
IP over Fiber
Wed Mar 16 00:32:49 CST 2011 Untitled Document
Classification of Services 應用服務之分類
Wed Mar 16 00:32:50 CST 2011 Untitled Document
QoS Demands 應用服務之品質要求
Wed Mar 16 00:32:51 CST 2011 Untitled Document
Qos Issues
QoS Slides
Wed Mar 16 00:32:52 CST 2011 Untitled Document
Open Programming Interface
Wed Mar 16 00:32:52 CST 2011 Untitled Document
All-IP vs. PSTN
Wed Mar 16 00:32:53 CST 2011 Untitled Document
New Complications
Wed Mar 16 00:32:54 CST 2011 Untitled Document
Feature Interactions
Wed Mar 16 00:32:55 CST 2011 Untitled Document
Evolution of Telecom 電信網路演進
   
Based on service complexity viewpoint
時代(Era) 提供服務 (Services) 代表技術 (Technology) Local Market Long Distance Market 網路互連 (Inerconnection)
傳統網路
Conventional 		basic calls 5ESS 獨佔
Monopoly 		獨佔
Monopoly 		單純 Simple
智慧型網路
IN 		simple features AIN 獨佔
Monopoly 		開放 Deregulated 稍複雜 Slightly Complicated (e.g. roaming)
未來網路
(B3G) 		complicated features A lot 開放
Deregulated 		開放
Deregulated 		非常複雜
Very Complicated
B3G Planning
Wed Mar 16 00:32:56 CST 2011 Untitled Document
Conventional Service Model 傳統電信網路之服務模型
Service Logic Distribution of Conventional Networks
 
Fixed routing
 
Fully Duplicated service logic
 
Only good for Basic calls and simple service features (CW, CF)
 
Difficult to add and to change service features
Wed Mar 16 00:32:57 CST 2011 Untitled Document
IN Service Model 智慧型網路之服務模型
智慧型網路 (Intelligent Network) Service Logic Distribution
 
Centralized Control
 
Easy to add and change simple features (800/080)
 
Limited communications between switches and SCPs
 
Not good for complicated features
Wed Mar 16 00:32:58 CST 2011 Untitled Document
Conclusion

⊕ 電信網路是國家基礎建設 (Network is a Key of National Infrastructure)

⊕ 電信網路龐大、複雜 (Network is Compilcate)

 
異質性太高，各層同時快速演進 (Network is heterogeneous and Evolve
Fast)

⊕ 網路革命之追求目標 (Objective of Network Revolution

單純化
(Simplification) 		彈性化
(Flexibility) 		經濟有效
(Cost Effective)

⊕ 需要資訊通訊人才通力合作，尋求整合性方案 (Need Cooperation to find integrated Solutions)

Wed Mar 16 00:32:58 CST 2011