4. New radio interfaces for HSDPA and HSUPA
4.1 Radio interface evolution
The UMTS radio interface has evolved considerably since the first version of UMTS: TD-SCDMA appeared in Release 4, followed by HSDPA in Release 5 (valid for both FDD and TDD) and HSUPA in Release 6 (for FDD mode). At each stage, new digital wireless communications techniques were integrated. These include higher-order modulation (16-QAM), fast retransmission (HARQ), packet scheduling in Node B, and the introduction of short time intervals between data block transmissions on the radio interface.
4.2 HSDPA...
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New radio interfaces for HSDPA and HSUPA
Architecture evolution towards NGN, IMS and MBMS
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References
- (1) - Consultation publique sur la réutilisation de fréquences 900 et 1 800 MHz pour la 3G et sur la quatrième licence 3G dans la bande 2 GHz - . ARCEP (oct 2006). http://www.arcep.fr/uploads/tx_gspublication/...
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