Universal Mobile Telecommunications System
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Article
45 sectionsContents
- Features
- Air interfaces
- W-CDMA (UTRA-FDD)
- Development
- Rationale for W-CDMA
- Deployment
- UTRA-TDD
- TD-CDMA (UTRA-TDD 3.84 Mcps High Chip Rate (HCR))
- TD-SCDMA (UTRA-TDD 1.28 Mcps Low Chip Rate (LCR))
- Objectives
- Technical highlights
- History
- Frequency bands & Deployments
- Unlicensed UMTS-TDD
- Comparison with UMTS-FDD
- Deployment
- Competing standards
- Radio access network
- Core network
- Frequency bands and channel bandwidths
- UARFCN
- Spectrum allocation
- Interoperability and global roaming
- Handsets and modems
- Other competing standards
- Migrating from GSM/GPRS to UMTS
- Problems and issues
- Security issues
- Releases
- Release '99
- Release 4
- Release 5
- Release 6
- Release 7
- Release 8
- Release 9
- See also
- Other, non-UMTS, 3G and [[4G]] standards
- Other information
- Notes
- References
- Citations
- Bibliography
- Documentation
- External links
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The Universal Mobile Telecommunications System (UMTS) is a 3G mobile cellular system for networks based on the GSM standard. UMTS uses wideband code-division multiple access (W-CDMA) radio access technology to offer greater spectral efficiency and bandwidth to mobile network operators compared to previous 2G systems like GPRS and CSD. The original version of UMTS provides a peak theoretical data rate of 384 kbit/s.