Title: Transport Networks for Evolution to 3G
1Transport Networks for Evolution to 3G
- Toyota Nishi
- NTT DoCoMo
- 13th November, 2003
- Network planning Dept.
- NTT DoCoMo
2Overview
- Our design policy and technologies for 3G
networks - Contents
- 3G network requirements
- Migration and operation issues exist on 3G packet
networks from the aspects of operators and
feasible solutions
3Outline
- Introduction
- Key requirements for a packet-based transmission
infrastructure. An example of solution for key
requirements - Migration issues for packet network
infrastructures from 2G - Summary
4Number of 3G Subscribers
(Video phone) (Mar. 2003)
2003.10.31 1,336,622
1,500,000
1,400,000
F2102V N2102V
1,300,000
(Video phone) (July. 2003)
P2102V (Video phone) (Oct. 2001)
No. of subscribers
1,200,000
P2102V
1,100,000
F2051 N2051
1,000,000
(i-motion mail Video clipping mail) (Feb. 2003)
900,000
2003.9.30 1,000,000
N2002 (i-motion) (Oct. 2001)
800,000
700,000
600,000
Nationwide service launch
500,000
400,000
Tokai, Kansai area service launch
300,000
200,000
100,000
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2001
2002
2003
5Mobile Networks Key Component
Wireless Network
Core Network (This presentation part)
Mobile Network
Mobile Subscriber
6Network Requirements
- To Guarantee Services in Transit
- For High Speed Data Traffic
- For Mass Subscribers
- For Lower Rate Accounting
Next slide
- EFFICIENT TRANSMISSION
- LOW COST NETWORK
7Increased System Throughput
HIGH THROUGHPUT
- Termination of W-TCP can increase system
throughput. - W-TCP is protocol for mobile Internet.
- It is optimized in accordance with W-CDMA
transmission technology. - Translation from W-TCP to TCP by GW function
enables increased mobile system throughput.
Without termination of WTCP
With termination of WTCP
Client (W-TCP)
Server (TCP)
Server (TCP)
Client (W-TCP)
GW
Data
Ack
Increased System Throughput
Wired interval TCP
Wireless interval W-TCP
8Service Requirements
- Smooth Migration From 2G to 3G
- Highlighting Benefits of 3G Networks
- AREA SUPPLEMENTATION DURING 3G INTRODUCTION
PERIOD - PROVISION OF 2G KEY SERVICES
Next slide
- HIGH SPEED AND MULTIMEDIA TRANSMISSION
9Network Architecture for Both 2G and 3G Services
For migration from 2G to 3G
- Overlay 3G network on 2G (PDC) network
- User profile is shared by both networks
2G(PDC) RAN
2G (PDC) Core Network
PDC Mobile Subscriber
HLR (User Profile)
3G RAN
3G Core Network (3GPP R99)
3G User Equipment
PDC Personal Digital Cellular
10Dual Network Service
For migration from 2G to 3G
- Supplement 3G areas during introduction period
with existing 2G(PDC) - Users must activate a network from which they
wish to receive Network services. - HLR manages activation state and terminates
incoming calls to an activated network.
HLR
CaseB Activation State ? PDC ACTIVE IMT
INACTIVE
CaseA Activation State ? IMT ACTIVE PDC INACTIVE
IMT ACTIVE
(3) Interrogation of ACTIVATION STATE
PDC ACTIVE
(2) Incoming Call
GMSC
(4) Call termination to IMT (Case A)
(4) Call termination to PDC (Case B)
MSC/VLR
MSC
PDC Service Activation
(1) IMT Service Activation
(1) PDC Service Activation
PDC
IMT
IMT Service Activation
Call terminating
MSISDN 090-1234-5678
CASE A
CASE B
PDC
IMT-2000
11Reverse Charging
Provision of 2G key services
- Reverse charging service enables users to access
specified access points at no charge. - According to registration of free HTTP addresses
beforehand by contents providers, billing filter
checks the HTTP address of packet data.
http//www.docomo1.co.jp FREE http//www.docomo2
.co.jp FREE http//www.foma1.co.jp FREE
HTTP
CHECK
TCP
http//www.google.co.jp
IP
http//www.yahoo.co.jp
http//www.google.co.jp
http//www.yahoo.co.jp
NORMAL RATE
Billing Filter
Contents Provider
GGSN
SGSN
RNC
FREE
Subscriber A
http//www.docomo1.co.jp
http//www.docomo1.co.jp
12Summary
- We made prompt 3G service launch possible because
solved above-mentioned requirements. - Provision of services for transitional period
from 2G to 3G and 2G key services in 3G network
has made smooth migration from 2G to 3G possible. - We are studying evolution scenario with adoption
of IP technologies to 3G packet network for
economization.