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NEC Receives World’s First IMS-Based Femtocell System Order from SOFTBANK MOBILE - Commercialization of IMS-based Femtocell services commencing in January 2009 -


***For immediate use September 22, 2008

Tokyo, September 22, 2008 - NEC announced today that it has received an order from SOFTBANK MOBILE Corp. (Head Office: Minato-ku Tokyo; President: Masayoshi Son) for the world’s first IMS-based (IP Multimedia Subsystem) femtocell system. IMS-based femtocell systems consist of IMS Cores, femtocell gateways and femtocell access points. SOFTBANK MOBILE completed development of a commercial system in June of this year and has already begun trial. The company plans to have IMS-based femtocell systems prepared for full commercial use commencing in January 2009.

Femtocell is a compact wireless base station designed for use in homes. It receives and transmits mobile phone radio waves using fixed indoor broadband connections. Femtocell technologies enable expanded indoor use of mobile phones where radio waves traditionally have difficulty reaching, and facilitate new data services and deliver self-contained high-speed broadband communications to individual households.

NEC’s IMS-based femtocell system for SOFTBANK MOBILE uses an IMS configured with an SIP server to independently control communications from femtocells. The system distributes transmission load across the entire mobile network, regardless of the traffic load, and helps prevent congestion as femtocells spread and traffic increases. The IMS framework is also compatible with backbone networks migrating to IP-based networks, and therefore facilitates the construction of all-IP networks for broadband, fixed and mobile communications. As the system is also highly compatible with SDP (Service Delivery Platforms), new business is anticipated in the future from the linkage of femtocells with home servers. NEC's IMS femtocell system employs Ubiquisys' Zonegate Access Point.

NEC has undertaken femtocell technology at an early stage, and is an active board member of the Femto Forum (URL:, an independent association established in July 2007. Working with femtocell vendors, NEC will continue to exhibit the leadership to further develop the potential of femtocells by leveraging industry-leading IMS and SIP technologies.

Overview of IMS-based Femtocell System

Overview of IMS-based Femtocell System


NEC Press Contact (Japan):

Akiko Shikimori
NEC Corporation
Tel: +81337986511

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