Seminar OnSeminar On

HSDPA(3.5G)&MBMSHSDPA(3.5G)&MBMS

Presented ByPresented By

AKSHAY WAGHAKSHAY WAGH

Guided ByGuided By

Ms. Vidya NikamMs. Vidya Nikam

OverviewOverview IntroductionIntroduction

HSDPAHSDPA

MBMSMBMS

HSDPA FeaturesHSDPA Features

• Hybrid Automatic Repeat Request Hybrid Automatic Repeat Request

• Fast cell site selection Fast cell site selection

• Adaptive Modulation and CodingAdaptive Modulation and Coding

HSDPA evolutionHSDPA evolution

HSDPA TerminalsHSDPA Terminals

ConclusionConclusion

ReferencesReferences

IntroductionIntroduction

After slow start of 3g network it is now deployed on broad-After slow start of 3g network it is now deployed on broad-scale and it provide multimedia services to users. scale and it provide multimedia services to users.

To meet increasing demand of high speed the 3g network To meet increasing demand of high speed the 3g network enhanced with HSDPA which support higher peak data rate.enhanced with HSDPA which support higher peak data rate.

Further for multiuser environment 3g enhanced with MBMS.Further for multiuser environment 3g enhanced with MBMS.

What Is HSDPA?What Is HSDPA?

High-Speed Downlink Packet Access (HSDPA) is an High-Speed Downlink Packet Access (HSDPA) is an enhanced 3G (third generation) mobile telephony enhanced 3G (third generation) mobile telephony communications protocol.communications protocol.

Also dubbed 3.5G, 3G+ or turbo 3G, which allows networks Also dubbed 3.5G, 3G+ or turbo 3G, which allows networks based on Universal Mobile Telecommunications System based on Universal Mobile Telecommunications System (UMTS) to have higher data transfer speeds and capacity.(UMTS) to have higher data transfer speeds and capacity.

Why HSDPA?Why HSDPA?

Increasing bit rates in downlink.Increasing bit rates in downlink.

Reducing delay ”TTI”.Reducing delay ”TTI”.

Efficient users schedulingEfficient users scheduling..

Increasing bit rates in uplink(Increasing bit rates in uplink(384 kbit/s.)384 kbit/s.)

Reducing Round Trip Timing(RTT)Reducing Round Trip Timing(RTT)

Why HSDPAWhy HSDPA??

Comparison Between 3G & 3.5G.Comparison Between 3G & 3.5G.Data Rate ( 2Mbps -----> 10 Mbps)Data Rate ( 2Mbps -----> 10 Mbps)

Modulation ( QPSK -----> QPSK&16QAM)Modulation ( QPSK -----> QPSK&16QAM)

TTI( 10ms ----> 2ms )TTI( 10ms ----> 2ms )

Multimedia Broadcast/Multicast Service Multimedia Broadcast/Multicast Service (MBMS)(MBMS)

Broadcast and Multicast are methods for transmitting data packets Broadcast and Multicast are methods for transmitting data packets from a single source to several destinations (point-to-multipoint). from a single source to several destinations (point-to-multipoint).

Service definition: A unidirectional point-to-multipoint service in Service definition: A unidirectional point-to-multipoint service in which data is transmitted from a single source entity to a group of which data is transmitted from a single source entity to a group of users in a specific area.users in a specific area.

Benefits: Benefits:

• Multiple users can receive the same data at the same time.Multiple users can receive the same data at the same time.

• Better radio resource utilization for the wireless operator. Better radio resource utilization for the wireless operator.

• High bandwidth applications support.High bandwidth applications support. MBMS supports 2 modesMBMS supports 2 modes

• Broadcast modeBroadcast mode

• Multicast mode. Multicast mode.

MBMS modesMBMS modes• Broadcast ModeBroadcast Mode

– unidirectional point-to-unidirectional point-to-multipoint transmission of multipoint transmission of multimedia data (e.g. text, multimedia data (e.g. text, audio, picture, video)audio, picture, video)

– The broadcast mode is The broadcast mode is intended to efficiently use intended to efficiently use radio/network resources e.g. radio/network resources e.g. data is transmitted over a data is transmitted over a common radio channel.common radio channel.

– Data is transmitted in the Data is transmitted in the broadcast service area as broadcast service area as defined by the network defined by the network (Home environment). (Home environment).

• Multicast ModeMulticast Mode

– The multicast mode allows the The multicast mode allows the unidirectional point-to-unidirectional point-to-multipoint transmission of multipoint transmission of multimedia data (e.g. text, multimedia data (e.g. text, audio, picture, video) from a audio, picture, video) from a single source point to a single source point to a multicast group in a multicast multicast group in a multicast service area. service area.

– Network to selectively Network to selectively transmit to cells within the transmit to cells within the multicast service area which multicast service area which contain members of a contain members of a multicast group.multicast group.

HSDPA FeaturesHSDPA Features

Hybrid Automatic Repeat Request Hybrid Automatic Repeat Request

H-ARQ SchemesH-ARQ Schemes

Chase combining(Identical Retransmission)Chase combining(Identical Retransmission)

Incremental Redundancy(Non-Identical Incremental Redundancy(Non-Identical Retransmission)Retransmission)

Chase CombiningChase Combining

Data Block

Retransmissions Block

Combine AcceptData

Block

Coding is applied to transmission packets Soft combining of original and retransmitted signals is done

at receiver before decoding Advantage:

self decodable, time diversity Disadvantage:

wastage of bandwidth

Incremental Redundancy

Advantage:

Reducing the effective data throughput/bandwidth of a user and using this for another user

Disadvantage:

non-self decodable

Data Block

Information from IR database

CombineError

Detection

IR Database

AcceptData Block

Error

No Error

Deliver To Upper Layers

HSDPA FeaturesHSDPA Features

Fast cell site selection Fast cell site selection

FastFast cell site selection (FCS)cell site selection (FCS)

20 to 30% of UE on soft handover

Tracking of active set of Node B‘s connected to a UE

Selection of the Node-B with the best current transmission

characteristics

High data rates can be achieved

Additional Physical Channels

High Speed Physical Downlink

Shared Channel (HS-PDSCH)

• HS-Downlink Shared Channel

(HS-DSCH)

• HS-Shared Control Channel

(HS-SCCH)

High Speed Dedicated

Physical Control Channel (HS-

DPCCH)

General ProcedureGeneral Procedure

HSDPA FeaturesHSDPA Features

Adaptive Modulation and CodingAdaptive Modulation and Coding

AMCAMC

Modulation Schemes:

• QPSK

• 16QAM

HSDPA EVOLUTIONHSDPA EVOLUTION

HSDPA Terminals

New terminals are required to take advantage of HSDPA:

• PC-cards will be the first on the market

• In the 1st phase terminals will offer:

Download 3,6 Mbps end user throughput

Upload 384 kbps

• Hand-held terminals will follow

• In a 2nd phase, peak data rates are increased to:

Download 14 Mbps

Upload 384 kbps

ConclusionConclusion

The most changing from 3G to the 3.5G is the modulation.The most changing from 3G to the 3.5G is the modulation.

More efficient implementation of interactive and background More efficient implementation of interactive and background

Quality of Service (QOS) classesQuality of Service (QOS) classes

Peak data rates exceeding 2 Mbps and theoretically 10 Mbps Peak data rates exceeding 2 Mbps and theoretically 10 Mbps

& more with MIMO& more with MIMO

ReferencesReferences http://www.telenor.hu/en/internet/coverage/http://www.telenor.hu/en/internet/coverage/

HSDPA in W-CDMA HSDPA in W-CDMA http://www.umtsworld.com/technology/hsdpa.htmlhttp://www.umtsworld.com/technology/hsdpa.html

http://www.nomor.de/home/technology/white-papers/technology-of-high-http://www.nomor.de/home/technology/white-papers/technology-of-high-speed-packet-access-hspaspeed-packet-access-hspa

IEEE TRANSACTIONS ON BROADCASTING, VOL. 55, NO. 4, IEEE TRANSACTIONS ON BROADCASTING, VOL. 55, NO. 4, DECEMBER 2009DECEMBER 2009

http://en.wikipedia.org/hsdpa.htmlhttp://en.wikipedia.org/hsdpa.html

Thank YouThank You