03. Hspa Basic

MobileComm Technologies India Pvt. Ltd.

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HSPA BASIC

Copyright 2010 MobileComm Technologies India Pvt. Ltd.

All rights reserved

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Document Number: RK/CT/3/2010

This manual prepared by: MobileComm Technologies

MobileComm Technologies(India)Pvt. Ltd.424, First Floor, Udyog Vihar Phase -4,

Gurgaon-122002

Headquarter:MobileComm Professionals Inc.

1255 West 15th Street, Suite 440Plano, TX, 75075

Tel: (972) 633-5100Fax: (972) 633-5106

www.mcpsinc.com

HSPA Motivations

3G Enables Wider Options of Services

3G Enables Advanced Data Services

HSPA for Higher Speed

• 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

What are the requirements for HSPA?

UMTS Data Rate Evolution

Uplink Peak Data Rate (Typical Deployment)

Downlink Peak Data Rate (Typical Deployment)

GSM 9.6 kbps 9.6 kbps

GPRS 20 kbps 40 kbps

EDGE 60 kbps 120 kbps

WCDMA Release 99 64 kbps 384 kbps

HSDPA - Release 5 384 kbps 10 Mbps*

HSUPA - Release 6 1.4 Mbps (early deployment) 10 Mbps

Applications Benefiting from HSPA

Voice-over-IP (VoIP)

- Low latency, Quality of Service (QoS) control, fine resource granularity and improved capacity

Video Telephony (in Packet Switched domain)

- Low latency, Quality of Service (QoS) control, high data rates and improved coverage and capacity

Gaming

-Low latency, fast resource allocation

Video Share / Picture Share

- High Uplink data rates and improved coverage and capacity

File Uploading (large files)

- High Uplink data rates and improved coverage and capacity

Delay

Sensitive

– Error

Tolerant

Delay

Tolerant

– Error

Sensitive

UMTS Evolution / 3GPP Releases

Year1999 2001

matured GSM/GPRS CN

+ UTRAN

+ WCDMA Air Interface

up to 384 kbps (2 Mbps)

• Bearer independent • CS CN• CAMEL Phase 4• UTRA FDD repeater• low chip rate TDD mode

• HSDPA (14 Mbps)• IMS Phase 1• W-AMR• enhanced • Location Services• 1800/1900 MHz

HSUPA (5.76 Mbps) IMS Phase 2 WLAN-Interworking MBMS Push-services

Release 99 Release 99

Release 4Release 99

Release 4

Release 5

Release 99

Release 4

Release 5

Release 6

2002/03 2005

HSPA Motivation and General Principle Improved performance and spectral efficiency in DL and UL by introducing a shared channel principle:

– Significant enhancement with peak rates up to 14.4 Mbps in DL, and 2 Mbps in UL– Huge capacity increase per site; no site pre-planning necessary– Improved end user experience: reduced delay/latency, high response time

HSDPA (3GPP Rel5)

Fast pipe is shared among UEs

Schedulin

g A,B

,CHSUPA (3GPP Rel6)

Dedicated pipe for every UE in ULPipe (codes and grants) changing

with timeE-DCH scheduling

E-DCH -

A

E-DCH -

B

E-DCH -

C

Rel. 99

DCH -A

DCH -B

DCH -C

Dedicated pipe for every UE

HSDPA Basic

What is High Speed Downlink Packet Access (HSDPA)

Smooth Upgrade

Short time to market with existing sites

HSDPA

• What is HSDPA?– A UMTS packet air interface– 3.6 Mbps up to theoretical 14.4 Mbps peak/user– Add-on solution on top of 3GPP R99/R4 architecture– HSDPA terminals co-exist with R99 terminals– No modification to the Core Network & Traffic Classes

• Difference between HSDPA and WCDMA today?– More Content for High End Users (5x faster and lower latency of 150

ms)– More Data Users per Cell (because it is ~10x more spectrally efficient)

• Adaptive Modulation and Coding (AMC) - Depending on UE channel conditions (CQI) - QPSK, 16QAM - Coding rate (1/4 - 3/4) - Data rate adapted on 2 ms time basis

• Fast Retransmission - Hybrid Automatic Repeat reQuest (HARQ) - UE soft-combines data - Reduced RTT

Fast Packet Scheduling (PS)

Scheduling of users on 2 ms time basis New radio channels included for HSDPA

- DL: HS-(P)DSCH, HS-SCCH - UL: HS-DPCCH

• It is important to note that downlink HSDPA is a shared data channel

- End user throughput depends on the number of the other users on the same HSDPA cell

- Capacity planning and dimensioning of HSDPA is different to non-real time (NRT) DCH bearer

Introduction HSDPA Basics

HSDPA Basic Principles

Shared Channel Transmission

Dynamically shared in time & code domain

Higher-order Modulation

16QAM in complement to QPSK for higher peak bit rates

2 ms

Short TTI (2 ms)

Reduced round trip delay

Fast Hybrid ARQ with Soft Combining

Reduced round trip delay

Fast Radio Channel Dependent Scheduling

Scheduling of users on 2 ms time basis

Fast Link Adaptation

Data rate adapted to radio conditions on 2 ms time

basis

t

P

Dynamic Power Allocation

Efficient power & spectrum utilisation

Dynamic Power Allocation

Dedicated channels (power controlled)

Common channels

Power usage with dedicated channels

t

Unused power

Power

Tota

l cell

pow

er

3GPP Release 99 3GPP Release 5

Dedicated channels (power controlled)

Common channels

Power usage with dedicated channels

t

Used for HSDPA

Power

Tota

l cell

pow

er


Up to 15 codes (SF16) can be allocated and shared between the users. It also depends on what the UE can support.

Channelization codes allocatedfor HS-DSCH transmission

5 codes (example)

SF=16

SF=8

SF=4

SF=2

SF=1

User #1 User #2 User #3 User #4

TTI

Shared channelizatio

n codes

A set of radio resources dynamically shared among multiple users,

primarily in the time domain.

C1,0 = [1]

C2,1 = [1-1]

C2,0 = [11]

C4,0 = [1111]

C4,1 = [11-1-1]

C4,2 = [1-11-1]

C4,3 = [1-1-11]

C8,0 = [11111111]

C8,1 = [1111-1-1-1-1]

C8,2 = [11-1-111-1-1]

C8,3 = [11-1-1-1-111]

C8,4 = [1-11-11-11-1]

C8,5 = [1-11-1-11-11]

C8,6 = [1-1-111-1-11]

C8,7 = [1-1-11-111-1]

C16,0 = [.........]C16,1 =

[.........]

C16,15 = [........]

C16,14 = [........]

C16,13 = [........]

C16,12 = [........]

C16,11 = [........]

C16,10 = [........]

C16,9 = [.........]

C16,8 = [.........]

C16,7= [.........]

C16,6 = [.........]

C16,5 = [.........]

C16,4 = [.........]

C16,3 = [.........]

C16,2 = [.........]

SF = 1

2 4 8 SF = 16

256 512...

Multi Code Operation


CQI – Channel Quality Indicator• UE sends CQI info in the UL to aid rate adaptation and scheduling

• CQI (1-30) provides the Node B with a measure of the UE's perceived channel quality and the UE receiver performance

• The CQI report estimates the number of bits that can be transmitted to the UE using a certain assumed power with a block error rate of 10%

Node BNode B

CQI (Report periodically)CQI (Report periodically)

Modulation (QPSK, 16QAM) self-adaptive

Good channel state: 16QAM

Bad channel state: QPSK

Coding rate (1/3, 3/4, etc.) self-adaptive

Good channel state: 3/4

Bad channel state: 1/3

Fast Link Adaptation

• Rate control– Adjusts data rate based on the Radio conditions (CQI)– Fast Adaptation : 2 ms TTI basis– Adaptive Modulation (QPSK and 16 QAM) and Coding– Use “available power”

High data rate

Low data rate

HS-DSCH with dynamic power allocationt

Dedicated channels

(power controlled)Common channels

HS-DSCH (rate controlled)

Tota

l cell

pow

er

Power


HARQFor Fast

retransmissions

HARQFor Fast

retransmissions


During retransmission, the UW employs soft combining.

1st Decoding in UE

2nd Decoding in UE

Final Picture

HSPA Basics

• Fast Scheduling in the Time domain (1):– Transmission Time Interval (TTI) of 2ms assigned to users– A short TTI reduces round-trip time and improves the tracking of channel– variations– the length of HSDPA sub-frame (TTI) is 3 slots (7680 chips)

Slot #0 Slot#1 Slot #2

Tslot = 2560 chips, M*10*2 k bits (k=4)

DataNdata1 bits

1 HS-PDSCH subframe: T f = 2 ms

Fast Schedulingin the Node-B


Fast Channel-dependent Scheduling

HSPA Basics

• Fast Scheduling in the Time domain (2):– Transmission is based on:

• Channel Quality• UE Capabilities• Current load in the cell (available resources / buffer status)• Traffic Priority classes / QoS classes• UE Feedback (ACK/NACK)

• Fast Scheduling in the code Domain– Up to 15 codes in parallel per TTI



Fast Channel-dependent Scheduling

Queue Selection Algorithms

Round Robin RR:•Assigns sub-frames in rotation

• User at cell edge served as frequently as user at cell centre

• Doesn’t account for UE’s channel conditions • Low total throughput in cell

•If no data have to be transferred to certain UE then sub-frame assigned to next UE

Proportional Fair PF:• Takes into account multipath fading conditions experienced by UE

• Improved total throughput in cell compared to RR

• Sub-frames assigned according scheduling metric• Ratio instantaneous data rate / average data rate experienced in the

past• User at cell edge served less frequently as user at cell centre

HSPA Basics

• High Order modulation: 16QAM• Code Multiplexing: up to 15 codes in parallel• User can be code and time multiplexed (TTI= 2ms)

Codes TTI = 2ms

User 1

User 2

User 3

Time and Code multiplexing in HSDPA

Fixed Spreading Factor, SF=16

-> 3.84Mcps/16 = 240 K symbols/s

-> @ 16QAM -> 240 x 4 = 960 kbps

-> @ code rate = 3/4 -> 720 kbps

720 kbps bit rate can be achieved per code -> 10.8 Mbps over 15 codes

Adaptive Modulation & Coding (AMC)

AIRCOM International 2006


• 16 QAM allows twice the data rate to a user compared to QPSK

• Currently all R99 channels use QPSK

• 16 QAM will only be possible for users within a limited radius of the NodeB (<20 % of the cell area ?)

• The Adaptive Modulation Coding scheme :– can be controlled (changed) every 2 ms TTI to account for changing

radio conditions– can be different for different users in different radio conditions

SF = 16 240 ksymb/s

Multi-Code operation:

1..15 codes 0.24 .. 3.6 Msymb/s

SF = 16 240 ksymb/s

Multi-Code operation:

1..15 codes 0.24 .. 3.6 Msymb/s


2ms

TTI 0 TTI 1 TTI 2 TTI 3 TTI 4 TTI 5 etc

Time

Number of allocated codes

5

0

user in a poor

radio channel

user in a changing

radio channel

user in a good

radio channel

t



• Coding is used to protect the user data bits from errors• HSDPA has a very flexible coding scheme which can vary every 2ms and

between each user • This allows a much more varied distribution of data rates within a cell

– Higher rates in very good radio conditions near the NodeB– Higher rates compared to R99 on cell edge



UE Support for AMC

• Maximum data rate possible to a single user depends heavily on the UE they are using

• There are 12 categories defined in the standards for different levels of HSDPA support

Category Codes Inter-TTI Modulation Data rate1 5 3 QPSK/16QAM 1.2 Mbps

2 5 3 QPSK/16QAM 1.2 Mbps








10 15 1 QPSK/16QAM 14.4 Mbps

11 5 2 QPSK only 0.9 Mbps

12 5 1 QPSK only 1.8 Mbps

The big picture for HSDPA

● Additional capacity

● Software upgrade

● Additional capacity

Core Network

HLRRNC

Node B

Backhaul

● Additional backhaul bandwidth to support higher data rates

• Increased processing power (HW)

• RF power allocation to HSDPA (min,max)

• Management of new device categories & signalling ch.

• Software upgrade

● Extended QoS field for HSDPA devices (for data rates >8 Mbps)

HSPA Basics

Summary of HSDPA key benefits

Throughputs of :• Up to 3.6 Mbps with QPSK• Up to 14 Mbps with

16QAM

Throughputs of :• Up to 3.6 Mbps with QPSK• Up to 14 Mbps with

16QAM

Adapted to variable-

throughput flows

Adapted to variable-

throughput flows

Quicker response timeQuicker response time

Mix of HSDPA and dedicated traffic possible on same carrier

Mix of HSDPA and dedicated traffic possible on same carrier

Cost effectiveCost effective

High Speed

Downlink

Packet Access

Adapted to bursty

traffic (statistical

Multiplexing benefit)

Adapted to bursty

traffic (statistical

Multiplexing benefit)

Fabricio Martinez


HSDPA Limitations

• HSDPA does not respond for the following needs– High uplink speed (uploading, video calls, video conferences,

browsing, online gaming, E-commerce)– Large capacity (Limited number of users)– Limited coverage (WCDMA has lower coverage than GSM in rural

areas WCDMA infrastructure is not profitable)

POSSIBLE SOLUTIONS: 1. HSUPA – significantly improved uplink2. WiMAX – significantly improved capacity3. CDMA2000 – increased coverage

HSDPA Channels

Physical Channel Overview

HS-PDSCHHigh-Speed Physical DL Shared Channel

HS-PDSCHHigh-Speed Physical DL Shared Channel

HS-SCCHHigh Speed Shared Control Channel

HS-SCCHHigh Speed Shared Control Channel

associated DCHDedicated Channel (Rel. 99)

associated DCHDedicated Channel (Rel. 99)

HS-DPCCHHigh Speed Dedicated Physical Control Channel

HS-DPCCHHigh Speed Dedicated Physical Control Channel

Node B

MAC-hs

F-DPCHFractional Dedicated Physical Channel (Rel. 6/7)

F-DPCHFractional Dedicated Physical Channel (Rel. 6/7)

HS-PDSCH

SF= 1

SF= 2

SF= 4

SF= 8

SF=16Example: Allocated for HS-DSCH

allocated for other channels

HS-PDSCH: High-Speed Physical Downlink Shared Channel• Transfer of actual HSDPA data• 5 - 15 code channels• QPSK or 16QAM modulation• 2 ms TTIs• Fixed SF16

••• up to 15 HS – PDSCHs

HS-SCCH

– HS-SCCH: High-Speed Shared Control Channel• L1 Control Data for UE; informs the UE how to decode the next HS-PDSCH frame e.g. UE Identity, Channelisation Code Set, Modulation Scheme, TBS, H-ARQ process

information• Fixed SF128• transmitted 2 slots in advance to HS-PDSCHs• NSN implementation with slow power control: shares DL power with the HS-PDSCH• more than 1 HS-SCCH required when Code Multiplexing is used• Up to 4 HS-SCCHs Codes

TBS: Transport Block Size

SF16HS-PDSCH

Time

User 1 User 2 User 3 User 4

Subframe2 ms

5

10

15

HS-DPCCH

– UL HS-DPCCH: High-Speed Dedicated Physical Control Channel• MAC-hs Ack/Nack information (send when data received)• Channel Quality Information (CQI reports send every 4ms, hardcoded period)• Fixed SF 256

HARQ-ACK(10 bit)

1 Slot = 2560 chip 2 Slots = 5120 chip

Subframe # 0 Subframe # i Subframe # N

1 HS-DPCCH Subframe = 2ms

CQI (20 bit)Channel Quality Indication

CQI values = 0 (N/A), 1 .. 30; steps: 1;1 indicating lowest, 30 highest air interface quality

CQI values = 0 (N/A), 1 .. 30; steps: 1;1 indicating lowest, 30 highest air interface quality

HS-DPCCH & CQI

1 137 1 QPSK 0

2 173 1 QPSK 0

3 233 1 QPSK 0

4 317 1 QPSK 0

5 377 1 QPSK 0

6 461 1 QPSK 0

7 650 2 QPSK 0

8 792 2 QPSK 0

9 931 2 QPSK 0

10 1262 3 QPSK 0

11 1483 3 QPSK 0

12 1742 3 QPSK 0

13 2279 4 QPSK 0

14 2583 4 QPSK 0

15 3319 5 QPSK 0

16 3565 5 16-QAM 0

17 4189 5 16-QAM 0

18 4664 5 16-QAM 0

19 5287 5 16-QAM 0

20 5887 5 16-QAM 0

21 6554 5 16-QAM 0

22 7168 5 16-QAM 0

23 9719 7 16-QAM 0

24 11418 8 16-QAM 0

25 14411 10 16-QAM 0

26 14411 12 16-QAM -1

27 14411 12 16-QAM -2

28 14411 12 16-QAM -3

29 14411 12 16-QAM -4

30 14411 12 16-QAM -5

UE observes

P-CPICH (Ec/Io)

CQI*

* UE internal (proprietary) process

TB Size [bit]

CQI value 0: N/A (Out of range)

= Reference Power Adjustment (Power Offset) [dB]

CQI used for:• Link Adaptation decision • Packet Scheduling decision

ACK/NACK used for:• H-ARQ process • Link Adaptation decision • HS-SCCH power adaptation

CQI TB Size # codes Modulation

•••up to 15 HS – PDSCHs

P-CPICH

HS – DPCCH (ACK; CQI)HS – SCCH

Associated DCH (DL & UL)

– DL DPCH: Associated Dedicated Physical Channel• Transfer of L3 signalling messages• Speech - AMR• Power control commands for associated UL DPCH

– UL DPCH: (DPDCH & DPCCH)• Transfer of L3 signalling messages• Transfer of UL data 16 / 64 / 128 / 384 kbps, e.g. TCP acknowledgements• Speech - AMR

DPDCH / DPCCH (time multiplexed)

DPDCH: L3 signalling; AMRDPCCH: TPC for UL DPCH power control

DPDCH: L3 signalling, AMR; TCP ACKs;

16 / 64 / 128 348 kbps

DPCCH: TPC, Pilot, TFCI

Fractional DPCH: F-DPCH (DL)

• The Fractional DPCH (F-DPCH):• was introduced in 3GPP Rel. 6 • replaces the DL DPCCH when the DL DPDCH is not present, i.e. both application data

and SRB are transferred using HSDPA• includes Transmit Power Control (TPC) bits but excludes TFCI & Pilot bits

• TFCI bits - no longer required as there is no DPDCH• Pilot bits - no longer required as TPC bits are used for SIR measurements

• increases efficiency by allowing up to 10 UE to share the same DL SF256 channelisation code

- time multiplexed one after another

Tx OffTPC

Slot #i

1 time slot 2560 chips

Tx Off

256 chips

HSUPA Basics

43 | HSPA Basics

HSUPA Introduction

• HSUPA: High Speed Uplink Packet Access

• 3GPP release 6 feature• Also called Enhanced DCH or Enhanced Uplink

• Purposes:– Boost uplink data performances in terms of higher throughput,

reduced delay and higher capacity– Balance uplink traffic performance with downlink HSDPA– Mandatory step for VoIP

HSUPA Overview

TTI = 10 ms1-4 Code Multi-Code

transmission

FastPower Control

Hybrid ARQwith incr.

redundancy

NodeB ControlledScheduli

ng

BenefitHigher Uplink Peak rates: 2.0 Mbps

Higher Capacity: +50-100%Reduced Latency: ~50-75 ms

45 | HSPA Basics

HSUPA Key Features

HSUPAHSUPAShorter TTI

10 or 2msHARQfor fast

retransmissions

Scheduling

at Node-B

46 | HSPA Basics

HSUPA Key Feature: H-ARQ

• Hybrid-Automatic Repeat Request– Retransmission with chase

combining or incremental redundancy

– Terminated in Node-B– Smaller delay– Higher BLER target -> smaller

Transmit Power and interference -> Higher capacity

H-ARQFor Fast retransmissions

R6 E-DCHR99 DCH

Packet

RLC ACK/NACK

Retransmission

PacketL1 ACK/NACK

Retransmission

47 | HSPA Basics

HSUPA Key Feature – Scheduling (1)

Schedulingin the Node-B


R6 E-DCH

Data

transmission

L3 Resource

Allocation

Scheduling Info

Scheduling

Assignment

• Scheduling in the Node-B– Not anymore handled by the RNC– Whenever the UE stops the

transmission or reduces the data rate, the free capacity can be quickly allocated to another UE

– Algorithm is vendor dependent

48 | HSPA Basics



DCH services

(eg voice and video)

UE 2

UE 1

UE 1

UE 2

UE 3

UE 1

UE 2

UE 3UE 1

TTI 0 TTI 1 TTI 2 TTI 3

RoT

Time

Maximum allowable noise rise

– Shared resource is the total Uplink interference eg Rise over Thermal Noise, RoT or interference margin

– The Node B controls the allocation of this margin

• Selects the best Transport Format Combination (TFC) for a given UE according to the available interference margin (left over R’99) and schedules the UE

HSUPA Key Feature – Scheduling (2)

HSUPA Channels

UE

SchedulingGrants

E-AGCHE-DCH Absolute Grant Channel

E-RNTI & max. power ratio E-DPDCH/DPCCH (Absolute Grant)

E-RGCHE-DCH Relative Grant Channel

UP / HOLD / DOWN (Relative Grant)

E-DPCCHE-DCH Dedicated Physical Control Channel

L1 control: E-TFCI, RSN, happy bit

E-DPDCHE-DCH Dedicated Physical Data Channel

User data & CRC

E-HICHE-DCH Hybrid ARQ Indicator Channel

ACK/NACK

Node B

Scheduling RequestScheduling information (MAC-e on E-DPDCH) or happy bit (E-DPCCH)

RSN: Re-transmission sequence number

Physical Channel Overview

51 | HSPA Basics

New Physical Channels

• HSUPA : New physical channels:

• Uplink:– E-DPDCH: E-DCH Dedicated Physical Data Channel– E-DPCCH: E-DCH Dedicated Physical Control Channel

• Downlink– E-AGCH:E-DCH Absolute Grant Channel– E-RGCH:E-DCH Relative Grant Channel– E-HICH:E-DCH HARQ Acknowledgement Indicator Channel

52 | HSPA Basics

• E-DPDCH – SF 2 to 256, Uplink, Dedicated channel – Multicode possible:

• 2xSF4, 2xSF2, 2xSF2+2xSF4– Information sent on this channel:

• Data

• E-DPCCH – SF 256, Uplink, Dedicated channel – Information sent on this channel:

• E-TFCI: E-DCH Transport Format Combination Indicator (ie indicates the transport block size used on E-DPDCH)

• RSN: Retransmission Sequence Number (informs about the HARQ sequence number of the transport block sent on E-DPDCH ie 0 if first transmission, 1,2or 3 if retransmission)

• Happy bit: indicates if the UE is « happy » with current data rate or if a higher power can be used.

New Physical Channels

53 | HSPA Basics

HSUPA UE Categories

Theoretical peak bit rate up to 5.76 Mbps

1.46 Mbps capability expected initially

Theoretical peak bit rate up to 5.76 Mbps

1.46 Mbps capability expected initially

Mac-e data rates

54 | HSPA Basics

Summary of HSUPA benefits

UE Throughputs up to 5.8Mbps

Up to 1.4Mbps in a first step

UE Throughputs up to 5.8Mbps

Up to 1.4Mbps in a first step

New services

VoIP, Mobile Gaming, Video Conferencing…

New services

VoIP, Mobile Gaming, Video Conferencing…

UL coverage improvement

for high data bit rate

UL coverage improvement

for high data bit rate

High Speed

Uplink Packet

Access

Deployed as an overlay of R99 and R5 networks

Deployed as an overlay of R99 and R5 networks

Better usage of the resources (interference)Better usage of the

resources (interference)

New revenues for operators &

better QoS for users

New revenues for operators &

better QoS for users

30-70% increase in system capacity

50% increase in user packet call throughput

30-70% increase in system capacity

50% increase in user packet call throughput

20-55% reduction in end-user packet call

delay

20-55% reduction in end-user packet call

delay

HSPA mobility

• HSDPA– Soft handover on associated DCH channels (signalling, UL data)– Serving cell change for HSDPA data channel

• Connected only to one cell at a time

• HSUPA– Soft handover utilised for uplink channels as required due to near-far

problem– Only Serving Cell can allocate more UL capacity/power

HS-SCCH

HS-PDSCH

DPCH

DPCHServing HS-DSCH cell

Notice that soft/softer handoveris not supported for HS-SCCH/HS-PDSCH

UE

128)

256)

Physical Channel Overview R99/R5/R6

Node B

57 | HSPA Basics

Rel’6 HSUPA

for uplink

1-2 Mbit/s

TTI=10 ms

HSUPA handsets & PC cards1st generation

HSUPA handsets & PC cards2nd generation

5 Mbit/s

TTI=2 ms

Rel’5 HSDPA

for downlink

HSPA UE Evolution

20062005 2007

Category 11, 12

0.9, 1.8 Mbit/s

Category 5, 6

3.6 Mbit/s

Category 7…10

7…14 Mbit/s

HSDPA PC cards PS only

HSDPA handsets 1st generation

HSDPA handsets

2nd generation

2008

58 | HSPA Basics

Comparison with R99 DCH and R5 HSDPA

Channel DCH (R99) HSDPA (R5) HSUPA

E-DCH (R6) Channel Type Dedicated Shared Dedicated

Spreading Factor Variable Fixed (SF =16) Variable L1- H-ARQ No Yes Yes Multicode

transmission Possible Yes Yes

TTI length (ms) 40 / 20 / 10 2 10 / 2 Adaptive Modulation No Yes No Node B Scheduling No Yes Yes Fast Power Control Yes No Yes

Soft Handover Yes No Yes

www.mcpsinc.com

03. Hspa Basic

Documents

hsdpa release

hsdpa dedicated channels

data users

hsupa release

high data rates

dimensioning of hsdpa

data rate demand

higher peak data rates