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Core Network Technology
Prof. Hamid AghvamiCentre for Telecommunications Research - King’s College London
Wireless Multimedia Communications Ltd
Outline of Presentation
• Fixed IP-based Core Networks
• Mobile Core Networks
• IP-based IMT Network Platform( IP2 )
• Research Challenges
• Inter-working Issues
• Co-operation between UK and Japan
IP-based Fixed Network
• One of the priority policy areas of the government-led “e-Japan” programme is the establishment of an ultra high-speed network infrastructure.• It has set goals to provide 24-hour connection to high-speed Internet access networks for at least 30 million households and ultra high-speed Internet access networks (30-100 Mb/s) for 10 million households within 5 years.• It has also set a deadline of 2005 for the deployment of IPv6 in all public and private networks.• The government has lowered the tax on IPv6 equipment.
• All IP equipment currently manufactured by Japanese manufacturers has dual protocol stacks, both IPv4 and IPv6.• The R&D activities in IP-based networks are founded on the recent IETF protocols and recommendations.
AMPS
MCS
NMT
TACS
ANSI-41
PDC
GSM/GPRS
EvolvedANSI-41
EvolvedGSM/GPRS
IPV4 IPV6
IP2
Evolved ANSI-41
Evolved GSM/GPRS
IMS
USA
Japan
Europe
Internet
Evolution of Mobile Networks and Internet
3G2G1G
Beyond 3G
Phase I (3.5G)
Phase II (4G)
Mobile Networks
Study Group Structure
IP2 Ad-Hoc
TTC (Telecommunication Technology Committee)
Long-term All IP Conference
ARIB (Association of Radio, Industry and Business )
3GPPs, WWRF, IETF
ITU-R WP8F
ITU-T IMT SSG
Radio Experts IT/NW Experts
IP2 Ad-Hoc Study Group
Chairman: Dr. Masami YABUSAKI (NTT DoCoMo)Vice-chairmen: Mr. Kazuyoshi SATO (Mitsubishi) Dr. Masayoshi OHASHI (KDDI)
Member Companies;NTT DoCoMo, Inc., Toshiba Corporation,KDDI Corporation, Seiko Epson Corporation,J-Phone Co., Ltd., Sony Corporation,Nippon Ericsson K.K. KYOCERA Corporation,Fujitsu Limited, Mitsubishi Electric Corporation,Lucent Technologies Japan Ltd., CRL,NEC Corporation, NTC (Nippon Telecommunications Consulting
Nippon Motorola Ltd., Co., Ltd.),
Nokia-Japan Co., LTD., NTT SOFT,NTT, QUALCOMM JAPAN,OKI Electric Industry Co., Ltd., DENSO Corporation,SHARP Corporation, Hitachi Ltd.,Siemens K.K. NTT Communication Corporation.Matsushita Communication Industrial Co., Ltd
IP2 Ad-Hoc Study Group
IP-based IMT Network Platform
IP-based IMT Network Platform ( IP2 ) main requirements:
• Huge multimedia traffic handling.
• Diversified radio access support.
• Advanced mobility management.
• Seamless/ubiquitous services
General architecture of the IP-based IMT network platform
Applications
AP1 AP2 AP3 APn
Middleware
IP-based transport NW
Location Accounting/billing Media conversion Distribution
Basic network management sub-layer
RRM MM C/SM Security QoS
Service support sub-layer
IP IPIP
IPRadio
Radio RadioIP IP
IP
ISDN/PSTN
Internet
IP-based IMT Network Platform
Research Challenges
• Full integration and convergence of mobile and Internet networks.- Common mobility management- Efficient and dynamic re-routing within the Internet for moving terminals- Separation of location management and routing management
• Design of middleware layer- Separation of basic network control from transport- Interaction between service support sub-layer and applications and between service support and basic network management sub-layers.
• No separation between RAN and CN.- Common interface between radio resource management and other network control entities
Research Challenges
“ The greatest challenge is not a technical one; it is how to influence the IETF to adopt the common protocols and functionalities required for IP2 . Radical changes to existing IETF protocols and the IP layer model will be required.”
Inter-working Issues
• The inter-working of WLAN and 3G cellular networks is fully recognised and some study and research work have already been carried out.
• Although the benefit of inter-working between broadcast and cellular networks has been recognised, no research activities have yet been announced or reported.
• The use of WLAN equipment based on IEEE 802.11b is common in Japan within private networks and it seems that IEEE 802.11a will follow it.
• Recently, NTT Communications Corp. has launched its WLAN public services.
Co-operation between UK and Japan
• Co-operation was proposed between UK and Japan in the areas of:
- Future network vision and its general requirements. - Evolution scenario from IMT-2000 networks. - Common global standardisation organisations and schedules.
• Co-operation was also proposed between the IP2 Ad Hoc Study Group and Mobile VCE.
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