Glossary
IMS
IP Multimedia Subsystem. A platform for various kinds of multimedia communication implemented with IP (Internet Protocol), including voice and short messages. It is a 3GPP standard and is used together with SIP (Session Initiation Protocol) for IP voice communication.
Conventional mobile phone networks use a non-IP-based communication platform based on the ATM, but migration to IP-based communication is being promoted when transforming 3G to 4G because of the affinity for the Internet. DOCOMO is also aiming for an all IP core network.
About us
- INDEX
- Company Overview
- DOCOMO's Vision
- Operating Data
- Organizational Structure
- Management Team
- Global Presence
- Corporate Social Responsibility
- Code of Ethics
- Events Calendar
- Facts & Figures
Press Center
Services
Technologies
Investor Relations
Features
Links
Stock Quotes
- Prices delayed 20 minutes.
- Data will be initialized before the market opening.
Data provided by REUTERS