hsdpa
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TRANSCRIPT
1
High Speed Downlink Packet Access in 3G Networks
Presented by: Syed Ali Shiraz
Reg # FA11-MS-0016
Subject: WCDMA Planning
May 03, 2012
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
3
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).
What is HSDPA?
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..
HSDPA Evolution
5
HSDPA Global Coverage
View of HSDPA Deployment around the Globe
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What does HSDPA Offer
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HSDPA Features
8
General Functionality of HSDPA
9 HSDPA Impact on Radio Access Network Architecture
10
HSDPA Protocol Architecture
11 HSDPA Channel Structure 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
RNC RNC Iur
Iub Iub
Iu Iu
Associated
Dedicated
Channels
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)
13 HSDPA Physical Layer Structure
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The Speed “Fast Pipe” on which the packet data are transferred.
HSDSCH Characteristics
15 HS-Downlink Shared Channel (HS-DSCH)
16 Adaptive coding and Modulation in HSDPA
17 HSDPA Physical Layer Structure
18 Hybrid Automatic Repeat Request
19 Adaptive coding and Modulation in HSDPA
20
Summary of The Presentation
21
Thank you for your Interest
Presented by: Syed Ali Shiraz
Reg # FA11-MS-0016
Submitted to: Sir Shua Hussain
May 03, 2012