hsdpa enhancements

8/10/2019 Hsdpa Enhancements

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Soc Classification level2 Nokia Siemens Networks RN30083EN30GLA0

Agenda

1) RU20 RECAP2) RU30 Feature overview3) HSDPA Enhancements4) HSUPA Enhancements5) New Mobility Concepts6) New Hardware and Performance Measurement Features


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MIMO and 64 QAM

Dual cell HSDPA with MIMO and 64 QAMHS Cell_FACHDynamic HSDPA BLER

HSDPA Enhancements


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HSDPA Enhancements

MIMO and 64 QAM



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MIMO and 64QAM RU20 and RU30HSDPA RU20 MIMO available by RAN 1642 OR

64QAM available by RAN 1643 But NOT both simultaneously

HSDPA RU30

MIMO AND 64QAM simultaneously availably by RAN 1912

RAN1912 RAN1642 RAN1643= +


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Software RAN 1642 MIMO RAN 1643 64QAM RAN 1638 Flexible RLC

Hardware WBTS release 7.0 RAN 1016 / RAN1848 Flexi BTS Multimode System Module (FSME) or

RAN 1671 Enhanced UltraSite BaseBand (EUBB)

Mandatory Features for MIMO + 64QAM

RAN1912

RAN1642

RAN1643

RAN1638 RAN1671

RAN1016/RAN1848

or


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Downlink RAN 1201 F-DPCH (Fractional DPCH)

Less power consumption Lower code tree occupation

Recommended Features for MIMO + 64QAM

RAN1201 Fractional DPCH

RAN1912 MIMO + 64QAM


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Peak throughput MIMO alone with 16QAM 2 * 14 Mbps = 28 Mbps

64QAM alone without MIMO

6 / 4 * 14 Mbps = 21 Mbps MIMO with 64QAM 2 * 21 Mbps = 42 Mpbs

UE categories MIMO alone Category 15 + 16 64QAM alone Category 13 + 14 64 QAM OR MIMO Category 17 + 18 64 QAM AND MIMO Category 19 + 20

Peak Throughput and UE Categories

HS- DSCHcategory

max. HS-DSCH Codes Modulation

MIMOsupport

PeakRate

19 15 QPSK/16QAM/64QAM

Yes 35.3 Mbps

20 15 QPSK/16QAM/64QAM

Yes 42.2 Mbps


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MIMO ConceptsSingle Stream On both HS-DSCH the same TBS is sent

The following information is transmitted by the HS channels HS-DSCH : 1 TBS transmitted per TTI on HS-DSCH HS-SCCH : TF 1, rank 1 and pre-coding control information sent to UE HS-DPCCH : CQI, ACK/NACK, rank 1 and pre-coding control information

Single Stream

CQI1, ACK/NACK, Rank 1, PCI

Rank 1, TF1, PCI

HS-DSCH TBS 1

TBS 1

HS-SCCH

HS-DPCCH

UE

BTS


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MIMO ConceptsDual Stream On the two HS-DSCH different TBS are sent

The following information is transmitted by the HS channels HS-DSCH : 2 TBS transmitted per TTI on the two HS-DSCH HS-SCCH : TF 1 and 2, rank 2 and pre-coding control information sent to UE HS-DPCCH : CQI 1 and 2, ACK/NACK, rank 2 and pre-coding control information

Dual Stream

CQI1 + CQI2, ACK/NACK, Rank 2, P CI

Rank 1, TF1 + TF2, PCI

HS-DSCH TBS 1

TBS 2

HS-SCCH

HS-DPCCH

UE

BTS


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MIMO ConceptsVirtual Antenna Dual Stream Special mapping function used to divide signal 1 (virtual antenna 1) and signal 2 (virtual antenna

2)

Mapping function transparent to UE, and same mapping used for reference signals P-CPICHand S-CPICH

MIMO CQI and PCI feedback from UE works as specified

P-CPICHOther cc:s, DCH, etc.

HSDPAdata1 S RF1

RF2

Ant1

Ant2S-CPICH

HSDPA12

w2

HSDPA11w1

Sw3

w4

HSDPAdata2

HSDPA21

HSDPA22

3GPP MIMO dual stream

V-Ant1

V-Ant2

Proprietaryantennamapping

H

s1

s2

s1

s2

P-CPICHOther cc:s, DCH, etc.

HSDPAdata1 S RF1

RF2

Ant1

Ant2S-CPICH

HSDPA12

w2

HSDPA11w1

Sw3

w4

HSDPAdata2

HSDPA21

HSDPA22

3GPP MIMO dual stream

V-Ant1

V-Ant2


H

Propriet aryantennamapping

H

s1

s2

s1

s2

Concept Power split


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MIMO ConceptsVirtual Antenna Single Stream Mapping function just applied to single data stream

Just 2 instead of 4 signal components transmitted per RF

P-CPICH

Other cc:s, DCH, etc.

HSDPAdata

S RF1

RF2

Ant1

Ant2S-CPICH

HSDPA2

w2

HSDPA1

w1

S

s1

s2

3GPP MIMO Single stream

V-Ant1

V-Ant2

s1

s2


H

P-CPICH

Other cc:s, DCH, etc.

HSDPAdata

S RF1

RF2

Ant1

Ant2S-CPICH

HSDPA2

w2

HSDPA1

w1

S

s1

s2

3GPP MIMO Single stream

V-Ant1

V-Ant2

s1

s2


H

Propriet aryantennamapping

H

Concept Power split


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MIMO ConceptsVirtual Antenna UE not supporting MIMO Mapping function like for single stream MIMO, but weighting factor for signal 2 set to 0

As a consequence the same single signal component transmitted per RF Non MIMO UEs supported by MIMO cell as well

Concept Power split


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MIMO ConceptsSelection of MIMO mode and modulation Both the MIMO mode and the modulation are offered in dependence on the air

interface Bad conditions Single stream Good conditions Dual stream Excellent conditions Dual stream + 64QAM

If both MIMO AND 64QAM is not possible, but either MIMO OR 64QAM, then MIMO ispreferred

Dual stream + 64QAM

Dual stream

Single stream


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Feature ActivationThe following parameters must be set to enabled HSDPAEnabled (WCEL)

HSUPAEnabled (WCEL) MIMOEnabled (WCEL) HSDPA64QAMAllowed (WCEL) FRLCEnabled (RNFC) MIMOWith64QAMUsage (WCEL)

One should pay attention to potentially stronger limits defined with thefollowing parameters MaxBitRateNRTMACDFlow (RNHSPA, 128..83968 kbps, default = 0 = no restriction)


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Impact on Throughput Role of SINR

MIMO + 64QAM requires

Very high SINR > 25 dB

Uncorrelated multi-pathcomponents

From Landre et al., realistic performance

of HSDPA MIMO in macro cell

environment, Orange 2009


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Feature ActivationThe following parameters must be set to enabled HSDPAEnabled (WCEL)

HSUPAEnabled (WCEL) MIMOEnabled (WCEL) HSDPA64QAMAllowed (WCEL) FRLCEnabled (RNFC) MIMOWith64QAMUsage (WCEL)

One should pay attention to potentially stronger limits defined with thefollowing parameters MaxBitRateNRTMACDFlow (RNHSPA, 128..83968 kbps, default = 0 = no restriction)


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New Counters in RNC

Counter ID Counter name Measurement

M1006C245 RADIO BEARER CONFIGURED FOR MIMO M1006 RRC signalling

M1006C246 RADIO BEARER CONFIGURATION FOR MIMO FAILED M1006 RRC signalling

M1006C247 RADIO BEARER CONFIGURED FOR 64QAM M1006 RRC signalling

M1006C248 RADIO BEARER CONFIGURATION FOR 64QAM FAILED M1006 RRC signalling


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HSDPA Enhancements

MIMO and 64 QAM



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Dual Cell HSDPA + 64QAM + MIMO RU20 and RU30HSDPA RU20 Dual cell available by RAN 1906 AND

64QAM available by RAN 1643 But NOT with MIMO (RAN 1642)

HSDPA RU30

Dual cell AND 64QAM AND MIMO simultaneously availably by RAN 1907

RAN1907 RAN1906 RAN1643= +

RAN1642 +


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Software RAN 1642 MIMO RAN 1643 64QAM RAN 1906 Dual cell HSDPA RAN 1912 MIMO + 64QAM RAN 1638 Flexible RLC RAN 1201 Fractional DPCH


RAN 1671 Enhanced UltraSite BaseBand (EUBB) RAN 1226 HSPA Peak Rate Upgrade for RNC196 and RNC450 or

RAN 2261 Flexible User Plane Capacity in RNC196 and RNC450 NPGE or NPS1 card in RNC

Mandatory Features for DC HSDPA + 64QAM + MIMO


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RAN1907

RAN1643

RAN1906

RAN1912

RAN1671

RAN1016/RAN1848

or

RAN1642

RAN1638 RAN2261

RAN1226

or

Mandatory Features for DC HSDPA + 64QAM + MIMO

RAN1201


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Peak throughput Dual cell HSDPA alone 2 * 14 Mbps = 28 Mbps

Dual cell HSDPA with 64QAM

6 / 4 * 28 Mbps = 42 Mbps Dual cell HSDPA with MIMO 2 * 28 Mbps = 56 Mbps Dual cell HSDPA with 64QAM + MIMO 2 * 42 Mbps = 84 Mbps

UE categories Dual cell HSDPA alone Category 21 + 22 Dual cell HSDPA with 64QAM alone Category 23 + 24 Dual cell HSDPA with MIMO Category 25 + 26 Dual cell HSDPA with 64 QAM + MIMO Category 27 + 28



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HS- DSCHcategory

max. HS-DSCH Codes Modulation

MIMOsupport

DC-HSDPAsupport

PeakRate

19 15 QPSK/16QAM/64QAM Yes No35.3 Mbps

20 15 QPSK/16QAM/64QAM Yes No42.2 Mbps

21 15 QPSK/16QAM No Yes 23.4 Mbps

22 15 QPSK/16QAM No Yes 28 Mbps

23 15 QPSK/16QAM/64QAM No Yes 35.3 Mbps

24 15 QPSK/16QAM/64QAM No Yes 42.2 Mbps

25 15 QPSK/16QAM Yes Yes 46.7 Mbps

26 15 QPSK/16QAM Yes Yes 56 Mbps

27 15 QPSK/16QAM/64QAM Yes Yes 70.6 Mbps

28 15 QPSK/16QAM/64QAM Yes Yes 84.4 Mbps

Single cell

Dual cell


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Overall Feature ConceptUpgrade steps From SC HSDPA first DC HSDPA for the UE is introduced Once F1 (primary cell) and F2 (secondary serving HS cell) are setup, MIMO SS or DS can be

introduced for UE either on F1 or both on F1 and F2 The MIMO modes SS / DS can be selected for each carrier independently Lastly, if channel conditions allow, 64 QAM can be introduced for the UE

SC HSDPA

DC HSDPA on F1 MIMO SS

DC HSDPA on F2 MIMO DS

MIMO DS

MIMO SS 64 QAM

64 QAM

DC HSDPA Only DC HSDPA + MIMO

F2

F1

DC HSDPA + MIMO + 64 QAM


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Dual Cell ConceptGeneral design To DC HSDPA UEs are assigned HS-DSCHs in the primary serving and secondary

serving high speed cell UL for DC HSDPA UEs transmitted via primary serving cell (no UL in secondary

serving HS cell) Besides HS-DSCH the primary serving cell is carrying

Full set of dedicated and common control channels UL transport channels E-DCH and control channels

Secondary serving HS cell is left clean as far as possible from signaling (maximumHS-DSCH capacity)

Among common channels only CPICH is used E-AGCH, E-RGCH and E-HICH might by existent for dual cell HSUPA


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Dual Cell Concept

Secondary servingHS cell


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Dual Cell ConceptCombination with MIMO HS-DSCH

2 HS-DSCH used, one on each carrier For MIMO on both these carriers For dual stream , 2 transport blocks are sent per TTI on each HS-DSCH (i.e. altogether 4 TBs ) For single stream , 1 transport block is sent per TTI on each HS-DSCH (i.e. altogether 2 TBs )

Virtual antenna concept can be used again to avoid degraded performance for non-MIMO /non-DC HSDPA users in DC HSDPA + MIMO cells

HS-SCCH Each DL carrier has its own HS-SCCH set, allowing separate scheduling between the

carriers in a similar way as for DC HSDPA 3GPP HS-SCCH type 3 used


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Dual Cell Concept

HS-DPCCH

Other common channels likeE-AGCH, E-RGCH, F-DPCH


UE

BTS

HS-SCCH

HS-SCCH

HS-DSCH

TBS3

TBS4HS-DSCH

TBS1

TBS2

Primary Cell

Secondary Cell


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Dual Cell ConceptCombination with MIMO HS-DPCCH

Feedback information for both DL carriers (primary and secondary) can be carried on singleUL carrier, using a single SF256 channelization code Up to 4 flows of ACK/NACKs have to be transmitted using 10 bits New coding and / or time multiplexing of ACK/NACK, CQI and PCI is required Due to lower redundancy more UE power required, i.e. more UL noise rise introduced

Other common channels E-HICH / E-RGCH E-AGCH F-DPCH All these channels are present in both cells


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Dual Cell Concept

BTS

HS-SCCH

HS-SCCH

HS-DPCCH

TBS1

TBS2HS-DSCH

TBS3

TBS4



HS-DSCH

Primary Cell

Secondary Cell

UE


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Impact on Coverage

Huge impact on cellcoverage as compared tonormal HSDPA mode (r =

1)

Small Overhead on HS-DPCCHS-CPICH needed for MIMO


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Impact on Coverage

57 %

10% 20 %

About 57% increase in range for aDC + MIMO cell


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Impact on Capacity

220 %

43 % 52 %

About 220% increase in throughputfor a DC + MIMO cell


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Impact on Capacity

29 %8 % 25 %

About 29% increase in number ofsubscribers for a DC + MIMO cell


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Other Feature Related ParametersDual cell or MIMO preference Dual cell HSDPA and MIMO simultaneously supported by UE, but not offered by the

network Define priority for either dual cell HSDPA or MIMO with DCellVsMIMOPreference

CQI feedback cycle Simultaneous usage of dual cell HSDPA and MIMO doubles the amount of CQI

reports One report is sent for carrier 1, one for carrier 2 (immediately after the report for

carrier 1) The reporting activity thus is higher than intended by the CPC parameters

N10msCQIFeedbackCPC/N2msCQIFeedbackCPC

DCellVsMIMOPreference

RNHSPADual cell HSDPA, MIMODefault = dual cell HSDPA

N10/2msCQIFeedbackCPC

RNHSPA0..160 ms in irregular steps (4..160 ms with DC HSDPA + MIMO)Default = 10/8 ms


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Transition Dual Cell Single CellDual cell or MIMO preference Dual cell HSDPA + MIMO supported for NRT services only

RT RAB shall be established

transition from dual to single cell HSDPA RT RAB released transition from single to dual cell HSDPA possible

SRB on CCH [F1] SRB on DCH [F1] SRB on SC HSPA [F1]

SRB + NRT RAB on DC HSDPA + MIMO [F1, F2]

SRB + NRT RAB + RT/CS RAB on SC HSDPA (F1)

Addition / removalof RT services

DC HSDPA SC HSPA

SC DC HSDPA HSPA

2 nd / 3 rd NRT SRBSetup / release


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New Counters in RNC


M1001C709 ACCESS STRATUM RELEASE INDICATOR RELEASE 9 1001 - Service Level

M1001C707 UE SUPPORT FOR HSDSCH CLASS 25 OR 26 1001 - Service Level

M1001C708 UE SUPPORT FOR HSDSCH CLASS 27 OR 28 1001 - Service Level

M1022C223 CHANNEL SWITCH FROM DC-HSDPA TO SC-HSDPA SUCCESSFUL 1022 - Packet Call

M1022C224 CHANNEL SWITCH FROM SC-HSDPA TO DC-HSDPA SUCCESSFUL 1022 - Packet Call


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New Counters in WBTS


M5000C424 SUM OF ACTIVE DC HSDPA MIMO USERS WITH TWO CARRIERS M5000 HSPA in WBTS

M5000C425 SUM OF ACTIVE DC HSDPA MIMO USERS WITH ONE CARRIER M5000 HSPA in WBTS

M5000C426 SUM OF CAPABLE DC HSDPA MIMO USERS M5000 HSPA in WBTS

M5000C427 TTI SCHEDULED DC HSDPA MIMO USER FOR PRIMARY CARRIER WITH ONE CARRIERDUAL STREAM M5000 HSPA in WBTS

M5000C428 TTI SCHEDULED DC HSDPA MIMO USER FOR PRIMARY CARRIER WITH ONE CARRIERSINGLE STREAM M5000 HSPA in WBTS

M5000C429 TTI SCHEDULED DC HSDPA MIMO USER FOR SECONDARY CARRIER WITH ONE CARRIERDUAL STREAM M5000 HSPA in WBTS

M5000C430 TTI SCHEDULED DC HSDPA MIMO USER FOR SECONDARY CARRIER WITH ONE CARRIERSINGLE STREAM M5000 HSPA in WBTS

M5000C431 TTI SCHEDULED DC HSDPA MIMO USER WITH BOTH CARRIER DUAL STREAM M5000 HSPA in WBTS

M5000C432 TTI SCHEDULED DC HSDPA MIMO USER WITH BOTH CARRIER DUAL AND SINGLESTREAM M5000 HSPA in WBTS

M5000C433 TTI SCHEDULED DC HSDPA MIMO USER WITH BOTH CARRIER SINGLE AND DUALSTREAM M5000 HSPA in WBTS

M5000C434 TTI SCHEDULED DC HSDPA MIMO USER WITH BOTH CARRIER SINGLE STREAM M5000 HSPA in WBTS


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HSDPA Enhancements

MIMO and 64 QAM



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Cell_FACH RU20 and RU30RU20 Very low capacity available in Cell_FACH state only

32 kbps on DL (FACH, S-CCPCH) 16 kbps on UL (RACH, PRACH) Causes problems in case of applications requiring frequent transmission of small

amount of data High signaling load due to frequent state transitions High battery power consumption for UE Strong occupation of dedicated resources for low total throughput

RU30 HSDPA available in Cell_FACH state, thus much higher capacity of 1.8 Mbps on DL UEs downloading small amount of data need not to enter Cell_DCH any more HSUPA in Cell_FACH NOT available yet


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Mandatory Features for HS Cell_FACH Software

RAN 1638 Flexible RLC on DL RAN 1096 Transport Bearer Tuning (specification of activity factor = average cell rate / peak

rate within transmission network)


RAN 1671 Enhanced UltraSite BaseBand (EUBB) RAN 1226 HSPA Peak Rate Upgrade for RNC196 and RNC450 or

RAN 2261 Flexible User Plane Capacity in RNC196 and RNC450

RAN1637

RAN1638

RAN1096

RAN1671

RAN1016/RAN1848

or

RAN2261

RAN1226

or


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HS Cell_FACH Concept on DL Channel Mapping All logical channels up to now mapped onto FACH now can be mapped onto HS-

DSCH Even broadcast and paging information can be transmitted via HS-DSCH (to UEs

in Cell_PCH or URA_PCH)


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UEs addressed by H-RNTI as usual Dedicated H-RNTI

For HS UEs in Cell_DCH as usual But also for HS UEs in lower states, if available

Common H-RNTI For all HS UEs of a cell in Cell_FACH not having dedicated H-RNTI These UEs additionally addressed by U-RNTI

CELL_FACHUE observes either commonor dedicated H-RNTI

CELL_PCHUE observes dedicated H-RNTIOr (if dedicated H-RNTI not available)IE "HS-DSCH paging system information"

CELL_DCH

Dedicated H-RNTI

URA_PCHDedicated H-RNTI is not applicableUE observes IE "HS-DSCH paging system information

UE must be allocated a dedicated H-RNTI in CELL_FACH, via RRCConnection Setup / Cell Update ConfirmCommon H-RNTI is only applicable in CELL_FACH

HS Cell_FACH Concept on DL UE Addressing


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HS Cell_FACH Concept on DL TransmissionHS Cell_FACH on DL, but not on UL Low UL performance (RACH used)

No ACK/NACK and CQI sending Blind repetition for HARQ Default CQI value for link adaptation

Mobility based on cell reselection as usual in Cell_FACH

D L : H

S - D S

C H

U L : R

A C HOriginal transmissions


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Feature Activation To enable HS Cell_FACH on the DL, the following settings are required

FRLCEnabled (RNFC) = enabled HSFACHEnabled (WCEL) = enabled


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HS Cell_FACH on DL Power Settings For user data and higher layer signaling same power management as in Cell_DCH

Slow power adjustment for HS-PDSCH due to dynamic share with R99 Fast CQI based power control for HS-SCCH

If BCCH information shall be transmitted via HS-DSCH, the power for both HS-PDSCH and HS-SCCH is fixed relative to CPICH

Parameter PtxBCCHHSPDSCH for HS-PDSCH Parameter PtxBCCHHSSCCH for HS-SCCH

PtxBCCHHSPDSCH

WCEL

-35..15 dB in steps of 0.1 dB

Default 7 dB above CPICH

PtxBCCHHSSCCH

WCEL

-35..15 dB in steps of 0.1 dBDefault 2 dB below CPICH


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Bit Cause Bit Cause

0 Originating conversational call 11 Inter-RAT cell change order

1 Originating streaming call 12 Registration

2 Originating interactive call 13 Detach

3 Originating background call 14 Originating high priority signalling

4 Originating subscribed traffic call 15 Originating low priority signalling

5 Terminating conversational call 16 Call re-establishment

6 Terminating streaming call 17 Terminating high priority signalling

7 Terminating interactive call 18 Terminating low priority signalling

8 Terminating background call 19 Terminating cause unknown

9 Emergency call (always 0) 20 MBMS reception

10 Inter-RAT cell re-selection 21 MBMS ptp RB request

Access causes in green prefer Cell_FACH Access causes in black prefer Cell_DCH

One can select by 22 bit parameter HSFACHRel7ConSetupEC for which RRCestablishment cause HS Cell_FACH or HS Cell_DCH is preferred

HS Cell_FACH on DL Channel Type Selection

HSFACHRel7ConSetupECWCEL

0,1 for each RRC establishment cause

Default 0001101111110110001100


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The preferred channel type is offered until no resources on it are available FACH overload according the parameters FachLoadThresholdCCH and

PtxThresholdCCH Prevents Cell_FACH for R99 users only (S-CCPCH) But not for HS users (HS-PDSCH)

HS Cell_FACH on DL Channel Type Selection


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Transition from Cell_FACH to Cell_DCH triggered by high activity on the link Huge amount of data in RLC buffer or High average data rate

High activity due to RLC buffer indicated, if Amount of data > HSFACHVolThrDL at least during the time HSFACHTimeTrigger

HS Cell_FACH on DL Transition to Cell_DCH

Time

HSFACHVolThrDLWCEL0,8,16,32..2048 ByteDefault 256 Byte

HSFACHTimeTrigger RNPS0..5000 ms with irregularstepsDefault 0 ms

Data in RLC buffer

Capacity requestgenerated


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High activity due to data rate indicated if Average data rate > HSFACHActivityThr at least during the time

HSFACHActTimeToTrigger

The data rate is averaged on basis of a sliding window configured byHSFACHActivityAveWin and updated with each packet sent to the UE

HS Cell_FACH on DL Transition to Cell_DCH

HSFACHActivityThr WCEL8..1024 Kbps in steps of 8 KbpsDefault 128 Kbps

Time

HSFACHActTimeToTrigger WCEL0..5000 ms with irregular stepsDefault 0 ms

Data rate

Capacity requestgenerated

HSFACHActivityAveWinWCEL0.2..5 s in steps of 0.2 sDefault 0.2 s


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HS Cell_FACH on DL NodeB Scheduling NodeB scheduling done by the same way as in Cell_DCH HS Cell_FACH and Cell_DCH users treated by same NodeB scheduler

Scheduling priority indicator set for HS Cell_FACH users by individual parameterPriForHSFACHDTCH

PriForHSFACHDTCH

RNPS

0..11 in steps of 1

Default 0


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New RNC Counters

Counter ID Counter name MeasurementM1001C705 UE SUPPORT FOR HS CELL_FACH M1001 Service Level

M1006C213 SUM OF UE OPERATING TIME IN ENHANCED CELL_FACH M1006 RRC signalingM1006C214 NUM OF UE MEASURED IN ENHANCED CELL_FACH M1006 RRC signalingM1006C215 CELL_DCH TO ENHANCED CELL_FACH ATTEMPTS M1006 RRC signaling

M1006C216 CELL_DCH TO ENHANCED CELL_FACH SUCCESSFUL M1006 RRC signaling

M1006C217 ENHANCED CELL_FACH TO CELL_DCH ATTEMPTS M1006 RRC signaling

M1006C218 ENHANCED CELL_FACH TO CELL_DCH SUCCESSFUL M1006 RRC signaling

M1006C219 CELL_PCH TO ENHANCED CELL_FACH ATTEMPTS M1006 RRC signaling

M1006C220 CELL_PCH TO ENHANCED CELL_FACH SUCCESSFUL M1006 RRC signaling

M1006C221 ENHANCED CELL_FACH TO CELL_PCH ATTEMPTS M1006 RRC signaling

M1006C222 ENHANCED CELL_FACH TO CELL_PCH SUCCESSFUL M1006 RRC signaling


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HSDPA Enhancements

MIMO and 64 QAM



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HSDPA BLER Target RU20 and RU30RU20 Non configurable BLER target , independent on the CQI

10% for static channel 25% for fading channel

RU30 BLER target configurable , in dependence on

fading CQI

With lower BLER target under good conditions up to 8 % more throughput can beachieved


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Mandatory Features for Dynamic HSDPA BLER Target Software

No specific requirements except basic HSDPA

Hardware WBTS Rel.7 RAN 1016 / RAN 1848 Flexi BTS Multimode System Module ( FSME ) OR RAN 1671 Enhanced UltraSite BaseBand ( EUBB )

RAN2171

RAN 1671

RAN 1016/RAN1848

or


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CQI Ranges BLER target settings can be done in dependence on the CQI

Low range reported CQI < medCQIRangeStart Intermediate range medCQIRangeStart Reported CQI < highCQIRangeStart High range highCQIRangeStart Reported CQI

The CQI ranges are defined by NodeB commissioning parameters

medCQIRangeStartBTSSCW1..30 with steps of 1Default = 12

highCQIRangeStartBTSSCW1..30 with steps of 1Default = 25

L o w C Q I Intermediate CQI High CQI


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Fading Scenarios BLER target settings can be done in dependence on fading The amount of fading is expressed by the variance of the CQI

Static channel Variance < 1 Weak fading 1 < Variance < 1.5 Intermediate fading 1.5 < Variance < 2.5 Strong fading Variance > 2.5

The fading scenarios are non configurable BLER targets can be set for the most extreme fading scenarios only

Static channel Strong fading

For the other fading scenarios the BLER targets still are non configurable Weak fading BLER target = 6% Intermediate fading BLER target = 10%

Static BLER target conf igur able

Default = 2-6 %

Weak fading BLER target

= 6%

Intermediate fading BLER target

= 10%

Strong fading

BLER targetconfigurable

Default = 25%


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BLER Targets Altogether 6 NodeB commissioning parameters

3 parameters for static channel and low / intermediate / high CQI 3 parameters for strong fading and low / intermediate / high CQI For each parameter there are the four possible settings 2% / 6% / 10% / 25%

Variance ofReported CQI

Low CQI Range Medium CQI Range High CQI Range

0 to 1 TargetBLERLowCQIStaCH TargetBLERMedCQIStaCH TargetBLERHighCQIStaCH1 to 1.5 6% 6% 6%

1.5 to 2.5 10% 10% 10%

>2.5 TargetBLERLowCQIFadCH TargetBLERMedCQIFadCH TargetBLERHighCQIFadCH

TargetBLERLow/Med/HighCQIStaCHBTSSCW2% / 6% / 10% / 25%Default = 6% / 2% / 2%

TargetBLERLow/Med/HighCQIFadCHBTSSCW2% / 6% / 10% / 25%Default = 25% / 25% / 25%


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BLER Targets With RU20 10% under best fading conditions With RU30 2% under best fading and intermediate / good CQI conditions

10% - 2% = 8% gain for throughput achievable

Variance ofReported CQI

Low C QI Range Medium CQI Range High CQI Range

0 to 1 6% 2% 2%1 to 1.5 6% 6% 6%

1.5 to 2.5 10% 10% 10%

>2.5 25% 25% 25%


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