wr bt05 e1 1 hsdpa technology-46
DESCRIPTION
HSDPA TechnologyTRANSCRIPT
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HSDPA Technology
ZTE University
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Content
Driver to HSDPA
HSDPA TheoryHSDPA Terminal & Commercial Application
HSDPA Solution
HSDPA Evolution
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Competition to operator
Introduce HSDPAto WCDMA
Introduce HSDPAIntroduce HSDPA
to WCDMAto WCDMA
2.5G GPRS: 9.05 -171.2kbit/s,
Service deployment is bad
CDMA2000 1x: 153.6kbit/s,
Service deployment is good
3G
CDMA 1x EV-DO: 2.4Mbit/sWCDMA R99/R4: 2Mbit/s
Peak data rate (Kbps)
Mean data rate (Kbps)
R9R9R9R9
9999
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The driver to HSDPA
High Speed Downlink Packet Access HSDPA is a new technology to enhance WCDMA PS data
service HSDPA gives subscribers new experience of more higher
speed data service with shorter time delay HSDPA brings more bandwidth and more online
subscribers It is necessary and feasible to introduce HSDPA to
WCDMA network With consideration of network planning and deployment
cost, HSDPA should be applied at the beginning, or atleast the Node B should hardware ready for HSDPA
HSDPA brings new requirement of transmission andnetwork planning. Pay more attention to it
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HSDPA, Mature technology
2002.6 R5 released
2003.6 HSDPA (High Speed Downlink Packet Access) was added
into R5
2002.6 R5 released
2003.6 HSDPA (High Speed Downlink Packet Access) was added
into R5
HSDPA is smoothly evolved from WCDMA R99 without any big effectto the existing R99 network
1 new transport channel: HS-DSCH
3 new physical channelsHS-PDSCH, HS-SCCH and HS-DPCCH MAC-hs sub-layer, HARQ (Fast Hybrid Automatic Repeat reQuest), Fast
Scheduling and AMC (Adaptive Modulation and Coding)
HSDPA is smoothly evolved from WCDMA R99 without any big effectto the existing R99 network
1 new transport channel: HS-DSCH
3 new physical channelsHS-PDSCH, HS-SCCH and HS-DPCCH MAC-hs sub-layer, HARQ (Fast Hybrid Automatic Repeat reQuest), Fast
Scheduling and AMC (Adaptive Modulation and Coding)
HSDPA --Max. downlink data rate: 14.4Mbps
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Competition advantage of HSDPA
Standard Data rate (Mbps) Subscribers per cell
WCDMA R99/R4 2M31PS64k, 15PS128k or
7PS384k
(SF=32, SF=16 or SF=8)
HSDPA 14.4
64
(117.7kbps per user, SF=16, R=3/4,16QAM)
CDMA2000 1x EV-
DO2.4
59
(only tens of kbps, 200kbps when 8
users is configured)
HSDPA supports more users while provides higher data rate!HSDPA supports more users while provides higher data rate!
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Perspective of HSDPA application
HSDPA Modem
HSDPA fixed terminal
Flexible access
HSDPA Modem
HSDPA fixed terminal
Flexible access
Higher data rate
More users
Richer service
Obvious advantage to compete withother 3G technology like CDMA2000
Higher data rate
More users
Richer service
Obvious advantage to compete withother 3G technology like CDMA2000
HSDPA data cardHSDPA PDA
Mixed with WMAN (WiMAX)and WLAN (Wi-Fi), more advantage ofbroadband wireless access
HSDPA data cardHSDPA PDA
Mixed with WMAN (WiMAX)and WLAN (Wi-Fi), more advantage ofbroadband wireless access
HSDPA handset
HSDPA Modem
HSPDA data card
HSDPA PDAWCDMA R99/R4 coverage
HSDPA coverage
HSDPA, roundly improves the value of WCDMA network
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Content
Driver to HSDPA
HSDPA TheoryHSDPA Terminal & Commercial Application
HSDPA Solution
HSDPA Evolution
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Evolve from R99/R4 to HSDPA
L2
L1
DSCH
FP
RLC
L2
L1
DSCH
FP
Iub/ Iur
PHY
MAC
PHY
RLC
Uu
MAC-d
HS-DSCHFP
HS-DSCHFP
MAC-hs
PHY(add 3
channels)
RNC, Node B: add HS-DSCH FP protocol process, involve Iub/Iur
Node B: add MAC-hs, responsible for AMC, HARQ, etc.
Node B: add 3 physical channels: HS-PDSCH,HS-SCCH,HS-DPCCH
UE: add MAC-hs, physical channels and process, modulation
MAC(add
MAC-hs)
PHY(add
process)
UEUEUEUE UTRANUTRANUTRANUTRAN
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New physical channels of HSDPA
HS-PDSCH is the bearer of HS-DSCH, transfer HSDPA user data (downlink) 2ms TTI, 3slots, spread factor is fixed to 16, multiple users & multiple codes, modulation method:QPSK and 16QAM
HS-SCCH bears information of HS-DSCH such as UE specialized mask code,
modulation and coding policy, etc. (downlink) 2ms TTI, 3 slots, spread factor is fixed to128
HS-DPCCH bears feedback information of HS-PDSCH such as Channel QualityIndication (CQI), H-ARQ confirm information ACK/NACK, etc. (uplink) 2ms TTI, 3 slots,spread factor is fixed to 256
R99 channel
HSDPA channel
DCCH(Signaling) + UL DTCH (PS traffic)
DL DTCH (PS traffic)
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HSDPA working procedure
RNCNode B
(AMC and HARQ)
Data Packet
ACK/NA
CKHS
-DPCC
H
Data
packe
t+re-se
nd(ifn
eed)
(HS-DS
CH)
AMC, modulation and coding selection
HARQ, lowers the time delay, improvesthe data throughput
Fast scheduling, quick decision
CQI
HS-DPC
CH
HS-D
SCHp
arame
ters(HS-SCC
H)
Data
(HS-DS
CH)
Evaluation, HS-DSCH parameters setting
Receive data from HS-DSCHaccording to DetectingHS-SCCH
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Key technology: AMC (1)
Adaptive Modulation andCoding (AMC), Node B can
adjust modulation (QPSK,16QAM) and coding rate (1/3,3/4, etc) in time according tothe feedback channel statefrom UE. So datatransferring can follow thestep of channel statechanging in time, it is a goodtechnology for link self-adaptive
For long time delay packet
data, AMC can improvesystem capacity without addinterference to neighbor cells
Standard AMC Remark
R99/R4 N Quick power control
HSDPA Y Satisfy 15dB SIR dynamic range
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Key technology: AMC (2)
Node BNode B
CQI (Report periodically)CQI (Report periodically)
Modulation (QPSK, 16QAM) self-adaptiveGood channel state: 16QAMBad channel state: QPSK
Coding rate (1/3, 3/4, etc.) self-adaptiveGood channel state: 3/4
Bad channel state: 1/3
Efficiently utilize the channel condition
Good channel state: higher speedBad channel state: lower speed
Codes adjustingGood channel state: more codesBad channel state: fewer codes
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Key technology: AMC (3)
HSDPA, the service bearing ability of one channel is further larger thanR99/R4 by using more efficient modulation and coding rate, while SF istwice as R99/R4
As using bigger SF, system can support more users
Standard Data rate (kbps) SF Modulation Coding rate
R99/R4 384 8 QPSK 1/2
HSDPA 720 16 16QAM 3/4
HSDPA, R99/R4 channel bearing ability comparisonMultiple coding rates
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Key technology: AMC (4)
Modulation
coding rate
Data rate
(1 code)
Data rate
(5 codes)
Data rate
(15 codes)
QPSK 1/4 120kbps 600kbps 1.8Mbps
QPSK 1/2 240kbps 1.2Mbps 3.6Mbps
QPSK 3/4 360kbps 1.8Mbps 5.4Mbps
16QAM 1/2 480kbps 2.4Mbps 7.2Mbps
16QAM 3/4 720kbps 3.6Mbps 10.8Mbps
HSDPA throughput, relative with modulation & coding rate
HSDPA can provide data rate per user up to 10.8Mbps (16QAM,3/4) by AMC and multiple codes technology
In the situation of high speed, HSDPA requires high channel
condition
Multiple coding rates
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Key technology: HARQ (1)
Hybrid Automatic Repeat reQuest
(HARQ) is a combined technology withForward Error Correction (FEC) andAutomatic Repeat reQuest (ARQ)
HARQ can provide flexible and subtleadjustment for its process by
cooperated with AMC
Standard HARQ Remark
R99/R4 NFEC is in high layer
ARQ is in RLC layer, channel feedback is slow
HSDPA YIncludes physical layer HARQ and HARQ entity in
MAC-hs
L1 HARQ
HARQ
MAC-hs
TFRC
L1L2
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Key technology: HARQ (2)
Advantage: improve transferring reliabilityDisadvantage: lower utilization in bad
channel state
Advantage: good performance inlower Bit Error Rate (BER)
Disadvantage: bad performance inhigh BER
FEC
ARQ
HA
RQ
Combine FEC and ARQ, eachsending packet includes error
detection bit and error correction bit
Pack
etAc
onfirm
Packet
Acon
firm
Error packet A
Packet A
Packet A
Error packetA
Packet A
Packet Amissing data
PacketAmissingdata
HARQ phase I
Resending is in RNCR99
HARQ phase II, III
Resending is in Node B, HSDPA
Packet A
Discard Reserve
Resendwhole packet Resent data
Soft combination
Rese
ndrequire
ment
Rese
ndrequire
ment
Packet BPacket B
Send SendReceive Receive
Lower efficiencyLonger time delay
Higher efficiency
Shorter time delay
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Key technology: Quick scheduling (1)
With quick channel
feedback, HSDPA
can suitably adjust
coding rate, codes,
modulation, etc. in
time according to
the channel state
Standard TTI (ms)
Channel feedback
time delay (ms) Remark
R99 10 100 (at least)
HSDPA 2 5.67
Supports continuous
feedback, R5 also
supports 10ms TTI
HS-PDSCH
HS-SCCH
HS-DPCCH (ACK/NACK and CQI)
HS-SCCH
2 TS 7.5 TS +/- 128 Chip N TS
1 TS = 2560 ChipHSDPA channel
feedback time delay
is about 8.5 TS
Quick channelfeedback
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Key technology: Quick scheduling (2)
Scheduling policy
Time fairness
Traffic fairness
Max-C/I
Proportional fairness
Every user get equal service time, but the trafficmaybe not equal, the fairest algorithm but has the
lowest traffic
Every user get the same traffic, but the timemaybe not equal, has the lower utility of systemresource because it will schedule the UE with
bad channel state
Only the user in best channel state (biggest C/I)will get the service priority in each turn, thebiggest traffic but has the worst fairness
Weighted compromise of above algorithms andhas bigger system traffic and better servicefairness
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Advantage of HSDPAComparing item R99/R4 HSDPA
System capacity (Mbps) 2.668 14.4
Spectrum efficiency
(Kbit/(MHz*Cell))537.6 2795.2
System handoverInter-frequency hard HOIntra-frequency soft HOIntra-frequency softer HOInter-system HO (GSM)
Only hard handover
Power controlOpen loop, Close loop (Inner loop, Outer loop)
PC, Quick, Slow PCHS-PDSCH adopts slow PC or even
no power control
Modulation QPSK QPSK, 16QAM
Link adaptive technology Quick PC and soft HOAMC, HARQ, Short TTI and Quick
channel feedback
MAC-hs N/A For faster scheduling
Provides various speedwith stable power
(stable power,adjustable speed)
Adjust power toguarantee service speed
(stable speed,adjustable power)
HSDPA R99/R4
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Content
Driver to HSDPA
HSDPA TheoryHSDPA Terminal & Commercial Application
HSDPA Solution
HSDPA Evolution
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Terminal Changing caused by HSDPA
Powerful 3G terminalsMuch more powerful, attractive HSDPA terminals
faster processor
larger memory
advanced receive and process algorithm 16QAM demodulation, multiple decoding
MAC-hs process
multiple codes
HSDPA terminal, first choice for high-end commercial application
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HSDPA PC card (MU330)
Functions
WCDMA 2.1GHz, GSM900/1800/1900
WCDMA 384KDL/128KUL, GPRS Class 10 SMS, Voice
HSDPA
ETSI AT command interface
OS: Windows 2000, XP
Language: Chinese, English, etc.
3V SIM/USIM card
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HSDPA handset (Q508)
Functions
WCDMA, GSM900/1800/1900
WCDMA 384DL/128KUL, GPRS Class 10
Voice, MMS, WAP, Email, JAVA, Download
Video phone, Streaming media, PTT
LCS (A-GPS)
MP3/MPEG4
Blue tooth/USB/mini-SD
HSDPA
Specs
Dual camera (2000K pixels)
Dual LCD: 260K colors
Main LCD: 2.2240320
MIDI: 72 chord
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HSDPA terminal category and capability
UE category Maximumchannels MinimalTTI interval Maximum servicespeed (Mbps) Modulation
Category 1-6 5 3 - 1 1.2~3.65
QPSK16QAM
Category 7 10 1 7.2
Category 8 10 1 7.2
Category 9 15 1 10.12
Category 10 15 1 14.4
Category 11-12 5 2 1.8 QPSK
Different UE supports various channels, minimal TTI and other parameters
UE listed in Category 11 is in worst receive capability, Category 10 is the best
HSDPA terminal
HSDPA handset HSDPA pc card HSDPA PDA
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HSDPA commercial process
Terminals
2005 2Q, several manufacture promote HSDPA trial version terminal
2005 4Q, promote commercial HSDPA terminal
Operator to deploy HSDPA
Cingular plan to deploy HSDPA in major city, 2006; till the end of 2006, toprovide the HSDPA service in most part of metropolitans.
NTT Docomo will deploy HSDPA in first quarter 2006; In UK, mmO2 willlaunch the service in fourth quarter 2005in HK H3G will provide commercialservice in first quarter 2006
Terminals
2005 2Q, several manufacture promote HSDPA trial version terminal
2005 4Q, promote commercial HSDPA terminal
Operator to deploy HSDPA
Cingular plan to deploy HSDPA in major city, 2006; till the end of 2006, toprovide the HSDPA service in most part of metropolitans.
NTT Docomo will deploy HSDPA in first quarter 2006; In UK, mmO2 will
launch the service in fourth quarter 2005in HK H3G will provide commercialservice in first quarter 2006
HSDPA standard has been determined
HSDPA has adequate test instruments
HSDPA technology has been tested in application
Manufactures has provided HSDPA commercial terminals in 2005
USA, Japan and the other operators start the HSDPA network construction
ZTE equipment are HSDPA ready
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High data service brings new experience
Colorful emailColorful emailMulti-access
Multi-access
This resturant looks
nice! Yeah, lets gothere tomorrow.
Adopt the HSDPA, operator can provide higher bandwidth service.
To deploy new service.
Multimedia DownloadMultimedia Download
NEWSNEWS MOVIEMOVIE MUSICMUSIC
Cartoon mailCartoon mail
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Content
Driver to HSDPA
HSDPA TheoryHSDPA Terminal & Commercial Application
HSDPA Solution
HSDPA Evolution
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HSDPA link budget R99/R4 link budget
Mode1 Mode2 Mode3 CS12.2 CS64 PS384
TX
NodeB TX power 40 40 40 27 30 38
Antenna gain 18 18 18 18 18 18
Cable loss 2 2 2 2 2 2
EIFR 56 56 56 43 46 54
RX
Thermal noisedensity
-174 -174 -174 -174 -174 -174
Thermal noise -108.157 -108.157 -108.157 -108.1566878 -108.1566878 -108.157
Noise figure 5 5 5 5 5 5
Interferencemargin
3 3 3 3 3 3
Service rate 423 368 635 12.2 64 384
Code number 5 4 5 1 1 1
Process gain 19.579909 10.18483 7.815575 24.9797 17.7815125 10
Eb/No 9 9 9 7.2 7.1 6.4
Rx sensibility -100.737 -101.342 -98.9723 -117.9364017 -110.8382003 -103.757
UE antenna gain 0 0 0 0 0 0
Body loss 0 0 0 2 0 0HSDPA can achieve the same coverage as R99/R4 under same data rate
Link budget for HSDPA
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HSDPA link budget R99/R4 link budget
Mode1 Mode2 Mode3 CS12.2 CS64 PS384
Others
Fast fadingmargin
0 0 0 2 2 2
Soft handover
gain0 0 0 2 2 2
Fading deviation 8 8 8 8 8 8
Penetration loss 20 20 20 20 20 20
Max path loss 128.7366 129.3415 126.9723 130.9364017 128.8382003 129.7567
HSDPA can achieve the same coverage as R99/R4 under same data rate
Link budget for HSDPA
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HSDPA construction solution
Networkconstruction
plan
Frequencypoint
assignment
Resource condition Advantage anddisadvantage
Recommendeddeployment
Intra-frequencyplan
F1:HSDPA+R99/R4
Less inter-frequencyhandover, admissioncontrol, load controland power control canbe achieved within onesame frequency cell.
Advantage:easy to do resourcecontrol
Disadvantage: donot have user detailclassification
After the networkconstructionfinished, toachieve the highdemand of voiceand PS downlink.
F2:HSDPA+R99/R4
Inter-frequencyplan
F1: R99/R4
Situation I: if HSDPAfrequency point supportnormal handset, all theresource have to beassigned within variousdifferent frequency cells.
Situation II: HSDPAfrequency point areonly used for PC card,resource managementcan be achieved moreeasily.
Advantage:voice user +HSDPAusers get goodservice
Disadvantage:resource control willbe difficult insituation I, maybesome frequencypoint resource willbe wasted at thebeginning
With thedevelopment of3G, to providededicatedfrequency pointfor HSDPA PCcard (only PSdomain)
F2: HSDPA
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ZTE HSDPA construction solution
If necessary, use acarrier only to supportPS data
HSDPA
(PC card)
f1 f2 f3
R99/R4+
HSDPA
R99/R4+
HSDPA
Phase I, IIPhase I, IIPhase I, IIPhase I, IIPhase IIIPhase IIIPhase IIIPhase III
ZTE solutionZTE solutionZTE solutionZTE solution
HSDPA construction area
Phase I :several hot spots,and the important buildingto deploy HSDPA
Phase II :all the hot spot andseveral macro sites to deploy HSDPA
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Network analysis for HSDPA and R99/R4
After the 3G network construction, the basic demand of WCDMA network
should adopt HSDPA function, with soft smooth upgrade ability.
HSDPA is not constructed as a individual network, HSDPA is a enhanced
technology of WCDMA (throughput, users)
Network construction and plan for R99 and HSDPA based on the one-shot
planning, multi-stage deployment
HSDPA and R99 share the same network, Node B supports HSDPA
function
At dense traffic area (capacity is restricted), HSDPA can share the
same site of R99 and achieve the same coverage of it.
Capacity and coverage is a balance relationship, increase the network
performance to the maximum by making a balance between them.
After the 3G network construction, the basic demand of WCDMA network
should adopt HSDPA function, with soft smooth upgrade ability.
HSDPA is not constructed as a individual network, HSDPA is a enhanced
technology of WCDMA (throughput, users)
Network construction and plan for R99 and HSDPA based on the one-shot
planning, multi-stage deployment
HSDPA and R99 share the same network, Node B supports HSDPA
function
At dense traffic area (capacity is restricted), HSDPA can share the
same site of R99 and achieve the same coverage of it.
Capacity and coverage is a balance relationship, increase the network
performance to the maximum by making a balance between them.
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HSDPA for major area
Area type Square (km2) Erl
Dense urban 91.5 3527
Urban 179.78 4873
Suburb 3000.5 2100
total 3271.78 10500
Major area have
no more than10% proportion
Major areaoccupy
80% traffic
Fully HSDPA
coverage formajor area!
Major areaMajor areaMajor areaMajor areadense urban + urbandense urban + urbandense urban + urbandense urban + urban
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HSDPA outdoor coverage
Node BNode B
Adaptive modulationGood channel state: 16QAM
Adaptive coding rate
Good channel state: 3/4
AMC
HSDPA requires a good channel condition for high speed service:
Good channel state
Near to Node B
At beginning, HSDPA is suitable for micro Node B coverage of outdoor hotspots.
Micro Node B is more suitable for HSDPA
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HSDPA indoor coverage
HSDPA indoor coverageHSDPA indoor coverage
CBD (focus on)
Office, hotel, etc
Shopping center, airport, etc
Macro Node BIndoor distributed system
Macro Node B/base band poolRRU
Indoor distributed system
Micro Node BIndoor distributed system
Pico
Solution
Transmission
PicoB01C
R8840
Powerdistributor
Twistedpair
Fiber
Feeder
Macro Node B or
base band pool
Concern of HSDPA indoor coverage
Is the existing indoor distributed systemof R99/R4 suitable for HSDPA?
Is capacity of the existing indoor
distributed system enoughIs the
transmission enough?
the indices of indoor distributedcomponents (like power distributor)
required by HSDPA and R99 are same,So the existing indoor distributed system
of R99/R4 is suitable for HSDPA
the indices of indoor distributedcomponents (like power distributor)
required by HSDPA and R99 are same,So the existing indoor distributed system
of R99/R4 is suitable for HSDPA
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Control
HSDPA Processor
DL Coder
DL Base-band
HSDPA Processor
UL Decoder
UL Base-band
Mid-frequency
After HSDPAUpdate
Before HSDPA
Update
After HSDPA
Update
Before HSDPA
Update
Iub Interface
FeaturesFeatures
Advanced designHSDPA
functions have been embedded
into hardware.
Just update software to support
HSDPA functions.
No additional hardware is needed!
ZTE serialized Node B support HSDPA flexible
update
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HSDPA functions have already been embedded into ZTE serialized Node B
hardware. The base-band processing chip supports 16QAM modulation. Only
software update is needed for Node B to support HSDPA.
Powerful base-band processing ability. For the case of updating the R99 cell into
R99/HSDPA, no more base-band processing board is needed for Node B.
As for RNC and CN, the introduction of HSDPA will only increase the data traffic
which means only additional interface hardware resource are needed.
ZTE Node B is designed based on the most advanced
HSDPA technology in the world. It is absolutely ensured
that to upgrade from R99 to HSDPA, no board is
required to be changed! The base-band processing
board also possesses a unique feature that is itsupports the networking of HSDPA and R99 with either
the same carrier or not! The most advanced base bandprocessing in the world!
The most advanced base bandprocessing in the world!
ZTE Node B hardware support HSDPA
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B09 indoor macro: support up to 3C3S and 6CS RRU
B09A outdoor macro: support up to 3C3S and 6CSRRU
B06C/B03C indoor/outdoor micro: support up to2C3S/3C1S.
B03R indoor/outdoor RRU: support up to 3C1S
B09B09
BBUBBBUB
B06CB06C
B03C/B03RB03C/B03R
B09AB09AB01CB01C
ZTE serialized Node B totally support HSDPA
BBUA indoor/outdoor base-band pool: maximum processing capacity is up to15CS
B01C pico Node B: 1C1S configuration
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Content
Driver to HSDPA
HSDPA Theory
HSDPA Terminal & Commercial Application
HSDPA Solution
HSDPA Evolution
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Mobile Communication Development
Mobile communication is developed from 2G3G3.9G. It isdeveloped from mobile voice service to high speed data service.
Currently it is developed to 3.5G. For WCDMA, commercial R5 versionand trial R6 version can be provided now.
3GPP is working on the standards of R7/HSPA+ and R8/LTE. It isestimated that R7 will be finalized on 2007 and R8 will be finalized on 2008.
The development of radio technology pays more attention to therequirement of operator NGMN organization proposed the system
development goal.
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Mobile Communication Technology Evolution
2G 2.5G 3G 3.5G 3.75G 3.9G2.75G
GSM
WCDMA
R99GPRS
EDGE
HSDPA HSUPA
HSPA+
LTE
IS-95CDMA20001X EV-DO
CDMA2000 1X
EV-DORev. A
EV-DORev. B
AIE
CDMA20001X EV-DV
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WCDMA Roadmap
GSMGPRS/EDGE
GSMGPRS/EDGE
3GR99
3GR99
3G+HSDPADownlink Enhanced
3G+HSDPADownlink Enhanced
3GHSDPA/HSUPA
Downlink/UplinkEnhanced
3GHSDPA/HSUPA
Downlink/UplinkEnhanced
GSM(GPRS/EDGE)GSM(GPRS/EDGE)
3G3GEnhanced UMTSEnhanced UMTS
Optimized UMTSOptimized UMTS
NGMNNGMN
NGMNLTE,Broadband radio
IP based widebandPeer to Peer
NGMNLTE,Broadband radio
IP based widebandPeer to Peer
2002-3 2003-4 2005-6 2007-9 After 2009Year
DLthroughput
64-144kbps 64-384kbps 384kbps-4Mbps 384kbps-7Mbps 20-50Mbps
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ZTE HSDPA solution conclusion
ZTE serialized Node B is alreadyhardware ready for downlink14.4M, only software upgrade isneeded
ZTE RNC and CN, unified platform,80G switching capability, highintegration, high capacity, smoothevolution, to ensure thedeployment of HSDPA
HSDPA can share carrier withR99/R4, or use a exclusive carrier Support handover between
HSDPA, R99/R4 and 2G Support simultaneous service of
HSDPA and voice (or videotelephony)
Support at least 64 users per cell HSDPA can share base band
board with R99/R4
All the Node Bs support HSDPAAll the Node Bs support HSDPA
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Exercise
pls describe the differentia of HSDPA and R4.
HSDPA introduces new physical channels, they
are ( ) ( ) ( ). pls describe the key technology of AMC
pls describe the key technology of HARQ.
pls write down the main quick scheduling methods.
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