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NTT DoCoMo prepares for LTE launch

Japanese telco prepares for commercial launch of LTE network in December

Tokyo will be one of the first cities in the world to benefit from LTE.
Tokyo will be one of the first cities in the world to benefit from LTE.

Japanese telco NTT DoCoMo has started to verify its LTE network prior to the full scale launch of commercial service in December.

The company said it had started verifying its LTE network system for speed, latency, stability of inter-cell handover and other conditions required for commercial operation.

The company also said that it planned to lease capacity on its LTE network from the launch of commercial operations in December 2010, according to a report from Telegeography.

DoCoMo expects to confirm 5 MHz-bandwidth throughput for 37.5 Mbps downlinks and 12.5 Mbps uplinks, followed 10 MHz-bandwidth throughput for maximum 75 Mbps downlinks and 25 Mbps uplinks in selected test areas.

The 2 GHz network system comprises dual W-CDMA/LTE base stations, LTE core network equipment and LTE-enabled mobile devices.

For efficiency, DoCoMo has been installing LTE base-station components on existing W-CDMA 3G base stations. Base stations in DoCoMo's existing W-CDMA network already equipped with dual W-CDMA/LTE remote radio equipment can be easily upgraded for LTE service with the addition of an LTE base station digital equipment, the company said.

The LTE devices to be used in the pre-launch operation are equipped for theoretical speeds of 100 Mbps downlinks and 50 Mbps uplinks. Compatibility with W-CDMA will enable seamless handover as the devices move between LTE and W-CDMA service areas in the network. The devices also are compatible with the GSM protocol, which will enable them to be used on LTE/GSM networks in overseas markets.