HSDPA

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

6

What does HSDPA Offer

7

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

14

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