The document discusses the evolution of HSPA and HSPA+ mobile technologies. It describes how HSPA introduced improvements like higher data rates, lower latency, and better capacity and efficiency over prior 3G standards. HSPA+ further improved capabilities by utilizing higher order modulations like 64QAM, multiple-input multiple-output antenna techniques, continuous packet connectivity, and layer 2 enhancements to achieve downlink speeds up to 42 Mbps and uplink speeds up to 11 Mbps.

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

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

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

25. RSN – 2bits

26. Happy – 1 bit

28. E – RGCH and E – HICH Slot information

30. HSUPA Categories

32. Data rate

33. Downlink : 42 Mbps

34. Uplink : 11 Mbps

35. Modulation

36. Downlink : 64 QAM

37. Uplink : 16 QAM

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)

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

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