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 SCCHSub 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-DPCCHSub 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 +

  • Evolved HSPA

32. Data rate 33. Downlink : 42 Mbps 34. Uplink : 11 Mbps 35. Modulation 36. Downlink : 64 QAM 37. Uplink :16 QAM 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 (