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SK Telecom in 40Gbit/s network upgrade

19 July 2011
SK Telecom already uses 10Gbps and 40Gbps DWDM equipment. But it now plans to increase network capacity by deploying additional 40Gbps links using Nokia Siemens Networks’ hiT 7300 DWDM platform.
“Through this measure SK Telecom hopes to be able to sufficiently deal with the data traffic increase expected in the coming years,” said Seong Jin Soo of SK Telecom’s integrated transmission engineering team. “We expect a doubling of data traffic in the next three years.” 
Korea has an advanced broadband market and has seen rapid growth in the number of smart phone users. SK Telecom will start offering data services using Long Term Evolution (LTE) cellular technology from July and plans to have the service in 23 cities by the end of 2012.  The operator also faces fierce local competition, with operator LG U+ planning to offer LTE services in 82 Korean cities before the year end.
Nokia Siemens Networks’ 40Gbps-based reconfigurable optical add-drop multiplexer (ROADM) platform will be used to upgrade SK Telecom’s nationwide backbone network as well as regional networks in key metropolitan areas. The system uses coherent polarization, quadrature phase-shift keying (CP-QPSK) multiplexing. This, says NSN, will allow the operator to upgrade its existing DWDM network infrastructure to 40Gbps without the costly and time-consuming fibre measurements required when deploying less sophisticated modulation systems.
SK Telecom says it has made no announcements regarding its 100Gbps DWDM network plans.
By Roy Rubenstein