HSPA & HSPA+ Janani P NexGtech Telecom
Requirements of HSPA •  Data Rate –  Demand for higher peak data rates •  Delay –  Lower latency •  Capacity –  Better cap...
Release 99 Down link Limitations •  Limited Peak Data Rate •  Capacity and Throughput •  Minimum TTI of 10 ms
Features of HSDPA •  Extension of DSCH •  Adaptive modulation and coding –  QPSK and 16-QAM –  Multi coding transmission –...
 
New HSDPA Channels Transport Channel •  High Speed Downlink Shared Channel (HS-DSCH) Physical Channels •  High Speed Share...
HS – DSCH
HS - SCCH
HS – SCCH  Sub frame information -   Channelization-code-set information (7 bits) –  Modulation scheme information (1 bit)...
HS - DPCCH
HSDPA Categories
Release 99 Uplink Limitations •  Large Scheduling Delays –  Slow scheduling from RNC •  Large Latency –  Transmission Time...
Features of HSUPA <ul><li>Maximum transmission rate of 5.76Mbps
QPSK modulation
No adaptive modulation
Multicode transmission
Spreading Factor either 2 or 4
10ms and 2ms TTI
Hybrid ARQ (HARQ)
Fast Packet Scheduling in the uplink </li></ul>
HSUPA Operation
New HSUPA Uplink Channels •  Enhanced Uplink Dedicated Channel (E-DCH) •  E-DCH Dedicated Physical Data Channel (E-DPDCH) ...
E – DPDCH and E - DPCCH
E-DPCCH  Sub frame information <ul><li>E-TFC - 7 bits
RSN – 2bits
Happy – 1 bit </li></ul>
E – RGCH and E - HICH <ul><li>SF -  128 </li></ul>
E – RGCH and E – HICH   Slot information
E - AGCH <ul><li>SF - 256 </li></ul>
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Hspa and hspa+

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This presentation describes about the release 5,6, and 7 umts specifications.

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Hspa and hspa+

  1. 1. HSPA & HSPA+ Janani P NexGtech Telecom
  2. 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. 3. Release 99 Down link Limitations • Limited Peak Data Rate • Capacity and Throughput • Minimum TTI of 10 ms
  4. 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)
  6. 7. HS – DSCH
  7. 8. HS - SCCH
  8. 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.
  9. 10. HS - DPCCH
  10. 11. HSDPA Categories
  11. 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
  12. 13. Features of HSUPA <ul><li>Maximum transmission rate of 5.76Mbps
  13. 14. QPSK modulation
  14. 15. No adaptive modulation
  15. 16. Multicode transmission
  16. 17. Spreading Factor either 2 or 4
  17. 18. 10ms and 2ms TTI
  18. 19. Hybrid ARQ (HARQ)
  19. 20. Fast Packet Scheduling in the uplink </li></ul>
  20. 21. HSUPA Operation
  21. 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)
  22. 23. E – DPDCH and E - DPCCH
  23. 24. E-DPCCH Sub frame information <ul><li>E-TFC - 7 bits
  24. 25. RSN – 2bits
  25. 26. Happy – 1 bit </li></ul>
  26. 27. E – RGCH and E - HICH <ul><li>SF - 128 </li></ul>
  27. 28. E – RGCH and E – HICH Slot information
  28. 29. E - AGCH <ul><li>SF - 256 </li></ul>
  29. 30. HSUPA Categories
  30. 31. HSPA + <ul><li>Evolved HSPA
  31. 32. Data rate
  32. 33. Downlink : 42 Mbps
  33. 34. Uplink : 11 Mbps
  34. 35. Modulation
  35. 36. Downlink : 64 QAM
  36. 37. Uplink : 16 QAM </li></ul>
  37. 38. Main features of HSPA+ <ul><li>Higher order modulation
  38. 39. Multiple Input Multiple Output
  39. 40. Continuous packet connectivity
  40. 41. Layer -2 Enhancements </li></ul>
  41. 42. Higher Order Modulation
  42. 43. Multiple Antenna Techniques Spatial Division Multiple Access (SDMA) Spatial Multiplexing (SM) Closed Loop Transmit Diversity (CLTD)
  43. 44. Continuous Packet Connectivity <ul><li>With HSPA,
  44. 45. Active : Cell_DCH
  45. 46. Inactive (<10s): Cell_DCH
  46. 47. (<30s): Cell_FACH
  47. 48. (>30s): Idle state </li></ul>
  48. 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
  49. 50. Layer 2 Enhancements <ul><li>Flexible RLC PDU size
  50. 51. MAC – ehs layer segmentation / reassembly
  51. 52. MAC – ehs layer flow multiplexing
  52. 53. Functions :-
  53. 54. Flow control
  54. 55. Scheduling
  55. 56. Priority Handling
  56. 57. HARQ </li></ul>
  57. 58. Overall Comparison

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