HSUPA: High-Speed Uplink Packet Access
High Speed Uplink Packet Access (HSUPA) is introduced in 3GPP Release 6 standards to improve the uplink UE data rate which was significantly low up to Release 5. To improve the uplink data rate some new functionality are added:
- New MAC entities: MAC-e/es in UE and MAC-e in NodeB and MAC-es in RNC.
- Transport channel: E-DCH
- Physical channels: E-DPDCH/DPCCH, E-HICH, E-RGCH, E-AGCH
- Transmission Time Interval: 2 ms or 10 ms
- SF = 2 can be used
- Fast Layer 1 transmission and retransmission
- Hybrid- ARQ using soft combining and incremental redundancies
- NodeB control grants or data rate
- New Frame Protocol in Iub/Iur interface (E-DCH FP)
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