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HSDPA
HSDPA
HSDPA
HSDPA
HSDPA
HSDPA
HSDPA
HSDPA
HSDPA
HSDPA
HSDPA
HSDPA
HSDPA
HSDPA
HSDPA
HSDPA
HSDPA
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HSDPA
HSDPA
HSDPA
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HSDPA

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  • 1. 1 High Speed Downlink Packet Access in 3G Networks May 03, 2012 Presented by: Syed Ali Shiraz Reg # FA11-MS-0016 Subject: WCDMA Planning
  • 2. Overview What is HSDPA? HSDPA Evolution HSDPA Global Coverage What does HSDPA Offer HSDPA Features General Functionality of HSDPA HSDPA Impact on Radio Access Network Architecture HSDPA Protocol Architecture HSDPA Channel Structure HSDPA Physical Layer Structure HSDSCH Characteristics HS-Downlink Shared Channel (HS-DSCH) Adaptive coding and Modulation in HSDPA HSDPA Physical Layer Structure Hybrid Automatic Repeat Request Adaptive coding and Modulation in HSDPA Summary of The Presentation 2
  • 3. What is HSDPA?  HSDPA stands for High Speed Downlink Packet Access.  Is a mobile telephone protocol in the High-Speed Packet Access (HSPA) family of third generation (3G) technology.  Dsigned to reduce the latency of the link and increase data transfer rates and the capacity of such networks through the transfer of data using a cellular phone.  HSDPA is associated with the various Universal Mobile telecommunications System (UMTS) networks.  The standard will provide download speeds on a mobile phone equivalent to an ADSL (Asymmetric Digital Subscriber Line). 3
  • 4. HSDPA Evolution 4  HSDPA is evolved from and backward compatible with R’99 WCDMA Systems Co-exists with R’99 in the same frequency band of 5 MHz..
  • 5. HSDPA Global Coverage View of HSDPA Deployment around the Globe 5
  • 6. What does HSDPA Offer 6
  • 7. HSDPA Features 7
  • 8. General Functionality of HSDPA 8
  • 9. HSDPA Impact on Radio Access Network Architecture 9
  • 10. HSDPA Protocol Architecture 10
  • 11. HSDPA Channel Structure 11 R5 of 3GPP standard introduces 3 new channels that support HSDPA.  One HS-DSCH (High Speed Downlink Shared Channel)  Mapped to up to 15 (5 in P4, 15 in P5) HS-PDSCH Dynamic allocation every 2 msec.  Time sharing only in P4. Code sharing in P5.  One HS-SCCH (High Speed Shared Control Channel)  Control information (UE ID, HARQ, TFRC)  SF 128, 2msec, downlink  One HS-DPCCH (High Speed Dedicated Physical Control Channel) per UE in the uplink.  HARQ UL (ACK, NACK), CQI.
  • 12. HSDPA Channel Structure     12 DL: High-Speed Downlink Shared Channel – HS-DSCH DL: High-Speed Shared Control Channel(s) – HS-SCCH (SCHEDULING) Associated Dedicated Channel – A-DCH UL :HS Dedicated Physical Common Control Channel - HS-DPCCH (CQI, HARQ ACK/NACK) Iu Iu RNC Iub RNC Iur Associated Dedicated Channels Iub
  • 13. HSDPA Physical Layer Structure 13
  • 14. HSDSCH Characteristics  The Speed “Fast Pipe” on which the packet data are transferred. 14
  • 15. HS-Downlink Shared Channel (HS-DSCH) 15
  • 16. Adaptive coding and Modulation in HSDPA 16
  • 17. HSDPA Physical Layer Structure 17
  • 18. Hybrid Automatic Repeat Request 18
  • 19. Adaptive coding and Modulation in HSDPA 19
  • 20. Summary of The Presentation 20
  • 21. 21 Thank you for your Interest May 03, 2012 Presented by: Syed Ali Shiraz Reg # FA11-MS-0016 Submitted to: Sir Shua Hussain

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