Kyeong Soo Kim, 2nd EU-Korea Cooperation Forum on ICT Research, Brussels, Belgium, Dec. 2008.

1. 1
www.eurosouthkorea-ict.org - info@eurosouthkorea-ict.org
On Next-Generation Metro and Access Networks
Kyeong Soo (Joseph) Kim
Senior Lecturer
Institute of Advanced Telecommunications (IAT)
School of Engineering
Swansea University
Wales, UK
An event organised by the European Commission (DG INFSO)
& the South Korean Ministry of Knowledge Economy (MKE)
December 1-2, 2008
Radisson SAS Royal Hotel
Brussels, Belgium
2nd EU-Korea Cooperation Forum on ICT Research
www.eurosouthkorea-ict.org - info@eurosouthkorea-ict.org
Institute of Advanced Telecommunications (IAT), Swansea University
A research-centred institute focusing on all aspects of telecommunication technologies.
13 academics and core research assistants with proven expertise and international profile
Specialized and state-of-the-art labs with capital assets valued at over £4M
Photonics research group
DWDM transmission
Advanced modulation techniques for 100+ Gbit/s
Fiber optical parametric amplifiers (OPAs)
Components and networks research
Optical regeneration, wavelength conversion, and WDM sources
Advanced Erbium-doped amplifier (EDWA)
Organisation Profile & Activities

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Wireless research group
Signal processing for communications
Smart antennas/MIMO, adaptive/iterative receiver design, space-time coding
Digital communications
Adaptive coding & modulation, multiple access (OFDM, CDMA, MC-CDMA)
RF & Microwaves
Systems
e-Health, intelligent transportation systems
Networks Research Group
Wireless networking
Mesh/ad-hoc/sensor networks, radio resource management
Access & metropolitan area networks
WiMAX, TDM/WDM PONs, hybrid optical-wireless networks
Network security & QoS
Internet security, multi-channel scheduling
Organisation Profile & Activities
www.eurosouthkorea-ict.org - info@eurosouthkorea-ict.org
Current Network Limitations
Bandwidth-hungry services (e.g., VOD, IPTV)
Increase the amount of network infrastructure
Increase the network energy consumption
Increase the data-driven network crashes
Due to:
Unbalance in capacity between core and access
Mismatch between service/usage models and network infrastructure
Large number of power-hungry and error-prone electrical components/systems

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Paradigm Shift in Optical Networking
Changes in network architecture
Performance →→→→ Energy Efficiency driven design
Static →→→→ Dynamic, Reconfigurable network
Dedicated →→→→ Shared resources
Separate, complicated →→→→ Integrated, Simplified management layers/interfaces
Unbalanced →→→→ Balanced bandwidth link utilization
Enabled by rapid development in core technologies
Burst-mode communications
Optical packet/burst/flow switching
Fast tunable optical components
www.eurosouthkorea-ict.org - info@eurosouthkorea-ict.org
Issues in Next-Generation Metro and Access Networks
Optical-wireless convergence
Mesh (multi-hop) networking and 4G will be key technologies
Metro-access integration
Common network architecture for both
Strategy for upgrading existing optical infrastructure (e.g., SONET ring & TDM-PON)
By introduction of WDM?
Through either WDM or hybrid TDM/WDM (with tunable components)
By extension of TDM?
Through longer-reach, higher-speed, and higher-split TDM-PONs

4. 4
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Ongoing/Potential EU-SK Cooperation Projects on ICT Research
Metro/Access
Multi-channel scheduling with tunable transceivers in WDM optical networks
Wi-Fi Cities: Hybrid two-tier wireless metro/access networks
WAN
MiSON: Evolution Strategy toward Future All-Optical Networks
R
R
Tunable
TX 1
...
...
Tunable
TX M
WDM
MUX
f1
fW
SchedulerScheduler
WDM
DEMUX
ONU 1
ONU W...
OLT Control Plane
Electrical
Transport Plane
Optical
Transport Plane
Resource Discovery,
MPLS signalling
IP/MPLS routers,
DXC, wavelength,
or packet switches
Control Plane
Electrical
Transport Plane
Optical
Transport Plane
Resource Discovery,
MPLS signalling
IP/MPLS routers,
DXC, wavelength,
or packet switches
Control Plane
Electrical
Transport Plane
Optical
Transport Plane
Resource Discovery,
Extended GMPLS
Signalling for OBS/OPS
IP/MPLS routers,
DXC, wavelength,
or packet switches
OXC, OCS,
OBS, OPS
Optical
Transport Plane
Resource Discovery,
Extended GMPLS
Signalling for OBS/OPS
OXC, OCS,
OBS, OPS
Control Plane
•Transparent network
•GMPLS-based control and traffic
engineering framework
With extensions for integrated
handling of all optical switched
traffic
Control Plane
Electrical
Transport Plane
Optical
Transport Plane
Resource Discovery,
Extended GMPLS
Signalling for OBS/OPS
IP/MPLS routers,
DXC, wavelength,
or packet switches
OXC, OCS,
OBS, OPS
Optical
Transport Plane
Resource Discovery,
Extended GMPLS
Signalling for OBS/OPS
OXC, OCS,
OBS, OPS
Control Plane
•Transparent network
•GMPLS-based control and traffic
engineering framework
With extensions for integrated
handling of all optical switched
traffic
www.eurosouthkorea-ict.org - info@eurosouthkorea-ict.org
Next Steps
Preparation of joint research proposals for FP7/ICT with Korean partners
Multi-channel scheduler with tunable transceivers in WDM optical networks
Ongoing collaboration with Stanford (through SUCCESS and GROW-Net)
ETRI and LG (through their WDM-PON experience in Korea) could be potential
partners, especially for test bed implementation.
Wi-Fi Cities
Need good expertise in WiMAX (WiBro) base station in studying interfacing between
WiMAX and WLAN mesh.
MiSON
Ongoing collaboration with BT
KT and other network operators could collaborate with BT through this project.

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Thank you for your attention!
Kyeong Soo (Joseph) Kim
Senior Lecturer
Institute of Advanced Telecommunications
School of Engineering
Swansea University
Wales, UK
k.s.kim@swansea.ac.uk
http://iat-hnrl.swan.ac.uk/~kks