文档介绍：China Global IPv6 Summit
TransformationTransformation ofof work
Past Present
work Partially Integrated Voice & Data
(Voice, Data, Wired, Wireless) Network
Mobile Data Voice
PSTN
MSC ATM Switch
IP Router Switch
STM ATM IP
PSTN PDSN
Data N/W
Mobile N/W IP Router
Exchange
MSC
•MSC : Mobile Switching Center
•ATM : Asynchronous Transport Mode •PDSN : Packet Data Service Node
IP : Protocol •STM : Synchronous Transport Mode
AdvantagesAdvantages ofof IPIP
work Requirements :
Broadband, Low Cost, Data / Voice / Multimedia stream
- ATM → All IP
ATM IP
Service Voice Data
QoS Guaranteed No Guarantee
Efficiency Low(Packet→Cell) High(Packet→Packet)
Tech. Evolution Multi Function(MSS) Broadband(Tera Router)
Preference Telco New Operator, ISPs
Cost High Low
* MMS : Multi Service Switch
work
IntegratedIntegrated work
SoftSwitch
All work
IP Switch
WGW
AGW/TGW
work PSTN work
•WGW : Wireless Gateway TGW : Trucking Gateway
AGW : Access Gateway
work EvolutionEvolution (( 11 ))
First Stage (Before IPv4) Second Stage(Current IPv4)
- Interconnection between - work through IPv4
works - Integration of heterogeneous
through works
- No global connectivity - Revolution
ALG
IPv4
ALG
ALG IPv4 IPv4
ALG
IPv4
ALG
IPv4
ALG : Application Layer Gateway
work EvolutionEvolution (( 22 ))
Third Stage (IPv4 & IPv6) Final Stage (IPv6 Only)
-Network Integration
-Device Integration (IP Address)
(Voice/Data, /Broadcasting)
-Any Time, Anywhere, AnyMedia
· Emergence of New Service
All IP
· Depletion of IPv4 Address
Wired Mobile
Computer
Network
PSTN
ALG
IPv6
IPv4 IPv6
ALG
IPv4 ALG PSDN work Broadcast
IPv6
Mobile ALG
Broadcast
Home Device
Home Device
IT Device
Mobile
IssuesIssues onon IPv4IPv4
Depletion of IP Address
Total number of IPv4 address : billion
- Remaining IP Address: - billion
- Needed IP by region (Asia ., EU