Technology

DOCOMO'S R&D started research and development of the WCDMA system from the beginning of the 1990s. And in 2001, DOCMO started the FOMA service based on the 3rd generation mobile communication system. DOCOMO is currently engaged in enhancing the performance of FOMA terminals and enhancement of the overall FOMA system, thereby realizing more user-friendly and attractive services for the customers.

The world of broadband communication is expanding rapidly. With DOCOMO R&D's development activities of HSDPA, a radio system on the W-CDMA system for higher transmission speeds, DOCOMO started the service in 2006, and currently provides max. downlink transmission speed of 7.2Mbps.

DOCOMO's R&D is currently engaged in the research and development of Long Term Evolution, LTE, which will realize the downlink transmission speeds of over 100Mbps. LTE will evolve the existing 3rd generation mobile communication system and expand the opportunities for new mobile applications.
LTE will enable smooth migration to the 4th generation mobile communication systems by exploiting the innovative technologies for 4G in the spectrum allocated for 3G.

In the 4th generation, higher transmission speeds and more flexible system are the targets.
We aim at realizing the super high transmission speeds of max. 100Mbps for outdoors and max. 1Gbps for indoors, which significantly exceed the current systems. DOCOMO's R&D has already confirmed the basic performance and field experiments are also been conducted.

Details of DOCOMO R&D activities are introduced.

Technical information regarding major research and development results produced by DOCOMO R&D is available in PDF format.

• Outdoor Booster for 800 MHz FOMA
• Outdoor Booster Equipment for 2 GHz FOMA
• Super-compact Base Station for Femtocells
• FOMA Core Network xGSN Packet Processing Nodes
• FOMA Domain Specific Access Control
• Converting to the IP-based FOMA Voice Network
• Media Processing Node for Providing Value-added Media Services
• FOMA Location Information Functions Using SUPL International Roaming

• Battery Packs and Chargers for Comfortable Use of Mobile Terminals
• Mobile Terminal RF Circuit Technology
• FOMA In-vehicle Telematics Module and Addition of Network Functionality

• Collaborating with Customers on Service Creation: "My DOCOMO Labs"

• Wellness Support Platform Using Mobile Terminals
• Molecular Transport System in Molecular Communication

Back numbers of previously posted technical information.

• Mobile Radio Transmission System
• Multiple Access
• W-CDMA Technology Supporting Third-Generation Mobile Communications System
• Cellular Mobile Communication System
• Mobile Communications Network
• Antennas, Base and Mobile Stations
• Aircraft Radio Telephone
• Marine Mobile Telephone
• Satellite Ｔelephone
• Pocket Bell (Pager)
• i-Mode Network System (PDC)

What's New

• 2011/12/19
  "Technical Journal" updated.
• 2011/7/20
  "Technical Journal" updated.

Evolution of the mobile communication network

• HSDPA (High Speed Downlink Packet Access)
• LTE (Long Term Evolution)
• 4th Generation Mobile Communication System (IMT-Advanced)

Technical Journal