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Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
Hspa and hspa+
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Hspa and hspa+

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  • 1. HSPA & HSPA+ Janani P NexGtech Telecom
  • 2. Requirements of HSPA • Data Rate – Demand for higher peak data rates • Delay – Lower latency • Capacity – Better capacity and throughput – Better spectrum efficiency – Finer resource granularity • Coverage – Better coverage for higher data rate.
  • 3. Release 99 Down link Limitations • Limited Peak Data Rate • Capacity and Throughput • Minimum TTI of 10 ms
  • 4. Features of HSDPA • Extension of DSCH • Adaptive modulation and coding – QPSK and 16-QAM – Multi coding transmission – Fast feedback of channel condition • Improve transmission efficiency – Fast retransmission and Physical Layer HARQ • Fast resource management – Node B scheduling • Reduce transmission latency – 2 ms TTI
  • 5.  
  • 6. New HSDPA Channels Transport Channel • High Speed Downlink Shared Channel (HS-DSCH) Physical Channels • High Speed Shared Control Channel (HS-SCCH) • High Speed Physical Downlink Shared Channel (HS-PDSCH) • High Speed Dedicated Physical Control Channel (HS-DPCCH)
  • 7. HS – DSCH
  • 8. HS - SCCH
  • 9. HS – SCCH Sub frame information - Channelization-code-set information (7 bits) – Modulation scheme information (1 bit) – Transport-block size information (6 bits) – Hybrid-ARQ process information (3 bits) – Redundancy and constellation version (3 bits) – New data indicator (1 bit) – UE identity (16 bits) One UE can receive up to 4 HS-SCCH channels.
  • 10. HS - DPCCH
  • 11. HSDPA Categories
  • 12. Release 99 Uplink Limitations • Large Scheduling Delays – Slow scheduling from RNC • Large Latency – Transmission Time Interval (TTI) durations of 10/20/40/80 ms – RNC based retransmissions in case of errors • Limited Uplink Data Rate – Deployed peak data rate is 384 kbps
  • 13. Features of HSUPA
    • Maximum transmission rate of 5.76Mbps
    • 14. QPSK modulation
    • 15. No adaptive modulation
    • 16. Multicode transmission
    • 17. Spreading Factor either 2 or 4
    • 18. 10ms and 2ms TTI
    • 19. Hybrid ARQ (HARQ)
    • 20. Fast Packet Scheduling in the uplink
  • 21. HSUPA Operation
  • 22. New HSUPA Uplink Channels • Enhanced Uplink Dedicated Channel (E-DCH) • E-DCH Dedicated Physical Data Channel (E-DPDCH) • E-DCH Dedicated Physical Control Channel (E-DPCCH) New HSUPA Downlink Channels: • E-DCH Hybrid ARQ Indicator Channel (E-HICH) • E-DCH Absolute Grant Channel (E-AGCH) • E-DCH Relative Grant Channel (E-RGCH)
  • 23. E – DPDCH and E - DPCCH
  • 24. E-DPCCH Sub frame information
    • E-TFC - 7 bits
    • 25. RSN – 2bits
    • 26. Happy – 1 bit
  • 27. E – RGCH and E - HICH
    • SF - 128
  • 28. E – RGCH and E – HICH Slot information
  • 29. E - AGCH
    • SF - 256
  • 30. HSUPA Categories
  • 31. HSPA +
  • 38. Main features of HSPA+
    • Higher order modulation
    • 39. Multiple Input Multiple Output
    • 40. Continuous packet connectivity
    • 41. Layer -2 Enhancements
  • 42. Higher Order Modulation
  • 43. Multiple Antenna Techniques Spatial Division Multiple Access (SDMA) Spatial Multiplexing (SM) Closed Loop Transmit Diversity (CLTD)
  • 44. Continuous Packet Connectivity
    • With HSPA,
    • 45. Active : Cell_DCH
    • 46. Inactive (<10s): Cell_DCH
    • 47. (<30s): Cell_FACH
    • 48. (>30s): Idle state
  • 49. CPC Enhancements In Uplink: · A new UL DPCCH slot format · UL DPCCH gating/discontinuous transmission · Implicit CQI reporting reduction In the Downlink: · F-DPCH gating in DL · Discontinuous reception (DRX) at the UE
  • 50. Layer 2 Enhancements
    • Flexible RLC PDU size
    • 51. MAC – ehs layer segmentation / reassembly
    • 52. MAC – ehs layer flow multiplexing
    • 53. Functions :-
    • 54. Flow control
    • 55. Scheduling
    • 56. Priority Handling
    • 57. HARQ
  • 58. Overall Comparison

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