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  • 8/13/2019 HSDPA Partner Workshop v1

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    2 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    HSDPA General principle

    Terminal 1 (UE)

    Terminal 2

    L1 Feedback

    L1 Feedback

    Data

    Data

    Shared DL data channel

    Fast link adaptation,scheduling and L-1 error

    correction done in BTS

    1-5 codes in RAN05(max.15 codes RAN06)

    QPSK or 16QAMmodulation

    User may be time and/orcode multiplexed.

    Channel qualityinformation

    Error correctionAck/Nack

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    3 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    Fast Link Adaptation in HSDPA

    0 20 40 60 80 100 120 140 160

    -2

    0

    2

    4

    68

    10

    12

    14

    16

    Time [number of TTIs]

    QPSK1/4

    QPSK2/4

    QPSK3/4

    16QAM2/4

    16QAM3/4

    In

    stantaneous

    EsNo

    [dB] C/I received by

    UE

    Linkadaptation

    mode

    C/I varieswith fading

    BTS adjusts link adaptationmode with a few ms delaybased on channel quality

    reports from the UE

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    Link adaptation: Modulation

    QPSK2 bits / symbol =

    480 kbit/s/HS-PDSCH =max. 7.2 Mbit/s

    6QAM4 bits / symbol =

    960 kbit/s/HS-PDSCH =max. 14.4 Mbit/s

    1011 1001

    10001010

    0001 0011

    00100000

    0100 0110

    01110101

    1110 1100

    11011111

    Q

    I

    10 00

    0111

    Q

    I

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    HSDPA Peak Bit Rates

    Coding rateCoding rate

    QPSKQPSK

    Coding rateCoding rate

    1/41/4

    2/42/4

    3/43/4

    5 codes5 codes 10 codes10 codes 15 codes15 codes

    600 kbps600 kbps 1.2 Mbps1.2 Mbps 1.8 Mbps1.8 Mbps

    1.2 Mbps1.2 Mbps 2.4 Mbps2.4 Mbps 3.6 Mbps3.6 Mbps

    1.8 Mbps1.8 Mbps 3.6 Mbps3.6 Mbps 5.4 Mbps5.4 Mbps

    16QAM16QAM

    2/42/4

    3/43/4

    4/44/4

    2.4 Mbps2.4 Mbps 4.8 Mbps4.8 Mbps 7.2 Mbps7.2 Mbps

    3.6 Mbps3.6 Mbps 7.2 Mbps7.2 Mbps 10.7 Mbps10.7 Mbps

    4.8 Mbps4.8 Mbps 9.6 Mbps9.6 Mbps 14.4 Mbps14.4 Mbps

    RAN05

    RAN05 CD1

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    User throughput

    HSDPA uses downlink shared channel.

    Downlink data is scheduled in 2 ms TTIs to users.

    User throughput depends upon the number of active HSDPA users in thecell/BTS.

    1st TTI

    2nd TTI

    3rd TTI

    Three HSDPA UEsreceiving data

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    1-THROUGHPUT

    Throughput vs. EcNo

    0

    200000

    400000

    600000

    800000

    1000000

    1200000

    1400000

    1600000

    1800000

    -3 -6 -9 -12 -15EcNo

    Through

    put

    2 W

    4 W

    6 W

    8 W

    10 W

    PtxMaxHSDPAPtxMaxHSDPA

    Stationary user

    Option datacard with Nemo

    RLC throughput

    Initial EcNo on the x-axis

    Stationary user

    Option datacard with Nemo

    RLC throughput

    Initial EcNo on the x-axis

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    8/438 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    Ec/Io: with and without HSDPA (R99 + R5 HSDPA)

    Ec/Io vs Initial Ec/Io

    -16.0

    -15.0

    -14.0

    -13.0

    -12.0

    -11.0

    -10.0

    -9.0

    -8.0-7.0

    -6.0

    -5.0

    -4.0

    -3 -6 -9 -12 -15

    Initial Ec/Io (w ithout HSDPA)

    E

    c/Io(withHSDPA)

    HSDPA_2W

    HSDPA_4W

    HSDPA_6W

    HSDPA_8W

    HSDPA_10W

    General Obersvation:

    E.g. Initial CPICH Ec/Io is -3dB. However,

    when HSDPA user is active, immediateobservation of Ec/Io degradation.

    Amount of degradation depends on the

    PtxMaxHSDPA parameter set.

    General Obersvation:

    E.g. Initial CPICH Ec/Io is -3dB. However,

    when HSDPA user is active, immediateobservation of Ec/Io degradation.

    Amount of degradation depends on the

    PtxMaxHSDPA parameter set.

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    Mobile UE Under 1 Cell - Throughput Novatel Data card

    Thr oughtput vs RS P

    0

    200

    400

    600

    800

    1000

    1200

    1400

    1600

    1800

    2000

    -120-110-100-90-80-70-60-50-40

    RSCP ( dBm)

    Throughput

    (kbps)

    Q vs RS P

    0

    5

    10

    15

    20

    25

    -120-110-100-90-80-70-60-50-40

    RSCP (dBm)

    CQI

    EcNo vs RS P

    -20

    -15

    -10

    -5

    0

    -120-110-100-90-80-70-60-50-40

    RSCP ( dBm)

    Ec/No

    A li ti th h t

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    10 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    Application throughput

    0

    200000400000

    600000

    800000

    1000000

    1200000

    1400000

    1600000

    1800000

    0 50 100 150 200 250 300 350 400 450 500 550

    s

    bps

    CPICH Ec/No

    -25.0

    -20.0

    -15.0

    -10.0

    -5.0

    0.0

    0 50 100 150 200 250 300 350 400 450 500 550

    s

    dB

    CQI

    0.0

    5.0

    10.0

    15.0

    20.0

    25.030.0

    0 50 100 150 200 250 300 350 400 450 500 550

    s

    CPICH RSCP

    -120.0

    -100.0

    -80.0

    -60.0

    -40.0

    -20.0

    0.0

    0 50 100 150 200 250 300 350 400 450 500 550

    s

    dBm

    CQI distribution

    0

    20000

    40000

    60000

    80000

    100000

    120000

    140000

    1 3 5 7 9 11 13 15 17 19 21 23 25 27 29

    CQI value

    #messag

    es

    Avg. Throughput~950kbps

    ff f ffi i

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    11 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    Effect of HSDPA Traffic on R'99 DCHs Ec/No QualityFTP download Example (good radio Conditions)

    HSDPA Throughput

    Pilot Ec/No

    Without

    HSDPA User

    => Ec/No = -

    4dB

    With HSDPA

    User

    => Ec/No

    degraded = -8dB

    ff f ffi ' / li

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    12 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    Effect of HSDPA Traffic on R'99 DCHs Ec/No QualityFTP download Example (good radio Conditions)

    Test 2 run 2

    0

    200000

    400000

    600000

    800000

    1000000

    1200000

    1400000

    1600000

    0 20 40 60 80 100 120

    Relative Time

    ApplicationTP

    -10

    -9

    -8

    -7

    -6

    -5

    -4

    -3

    -2

    -1

    0

    Ec/Io(dB)

    Application Throughput Ec/No

    Ec/Io decreases

    of 3 dB during

    the transfer. Thisdifference is due

    to the

    PtxMaxHSDPA

    power which isallocated only

    when there is at

    least one HSDPA

    user

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    13 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    Multiple Users Test: 3 Datacards in Static

    Datacards: 2 Novatel and 1 Sierra

    Service: 3 FTP users

    Impact of 3 Users on Throughput

    0

    200000

    400000

    600000

    800000

    1000000

    1200000

    1400000

    1600000

    Time (s)

    ApplicationT

    hroughput

    (bps)

    1 user 1 user2 users 2 users3 users

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    14 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    Release99 vs HSDPA Retransmissions

    Terminal

    BTS

    RNC

    Rel99 DCH/DSCH Rel5 HS-DSCH

    Packet Retransmission

    RLC ACK/NACK

    L1Retransmission

    L1 ACK/NACK

    Packet

    RLC Retransmission

    RLC ACK/NACK

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    15 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    New Node B functionality for HSDPA

    TerminalsNode BRNC

    PacketsScheduler

    & Buffer

    ARQ &

    Coding

    ACK/NACK &Feedback Decoding

    Flow Control

    New Node B functions:

    Scheduler: Terminal scheduling, Coding & Modulation selection (16QAMas new modulation)

    ARQ Retransmissions Handling

    Uplink Feedback Decoding

    Flow Control towards SRNC

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    16 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    New terminal functionality for HSDPA

    TerminalNode BRNC

    PacketsARQ

    Decoding

    Soft Buffer

    & Combining

    ACK/NACK &Feedback

    Generation

    Flow Control

    New terminal functions:

    16 QAM demodulation

    ARQ Retransmissions Handling

    Soft buffer & combining

    Fast Uplink Feedback Generation & encoding

    First terminals are data cards without voice capability

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    17 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    HSDPA Protocol Architecture

    New MAC entity, MAC-hs added to the Node B

    Layers above, such as RLC, unchanged.

    WCDMA L1

    UE

    Iub/Iur

    SRNCNode B

    Uu

    MAC-hs

    RLC

    NAS

    HSDPA user plane

    WCDMA L1

    MAC-hs

    TRANSPORT

    FRAMEPROTOCOL

    TRANSPORT

    FRAMEPROTOCOL

    MAC-dRLC IuMAC-d

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    18 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    PDUs of Different Protocol Layers

    RLC

    higher layer

    MAC-d

    MAC-hs PDU (= transport block = TB)physical

    layer

    padMAC-hs

    RN

    C

    No

    de

    -B

    Iub

    header MAC-d PDU (= MAC-hs SDU)

    header RLC PDU (= MAC-d SDU) header RLC PDU (= MAC-d SDU)

    header part of RLC SDU header part of RLC SDU

    higher layer data packet

    HS-SCCH

    MAC-d PDU (= MAC-hs SDU)

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    19 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    MAC-d and MAC-hs

    Mac-d remains in RNC in the same way as for Release 99

    Mac-hs is located in the Node B to allow rapid re-transmission of NRT data

    Mac-d is responsible for:

    mapping between logical channels and transport channels; selection of appropriate Transport Format priority handling identification of UEs on common transport channels multiplexing/demultiplexing of upper layer PDUs traffic volume measurement; transport Channel type switching; ciphering for transparent mode RLC

    Mac-hs is responsible for: Packet scheduling Link adaptation L1 error correction and retransmissions (H-ARQ) Flow control between RNC and BTS

    MAC-hs

    PHY PHY TNL

    MAC-d

    MAC-hs

    HS-

    DSCH FP

    HS-

    DSCH FP

    MAC-d

    TNL

    UE Uu BTS Iub RNC

    RLC RLCMAC-d flow

    HS-DSCH

    HS-PDSCH

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    20 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    MAC-hs

    MAC-hs functions in BTS

    Iub Flow Control

    Data Buffering

    Packet Scheduling Link Adaptation

    Hybrid ARQ

    MAC-hs Protocol Services

    Data transfer on HS-DSCH

    In-order delivery

    within priority queue

    For each subframe = 3 slots = 2 ms

    Interpret incoming Ack/Nack and CQIinformation.

    Perform Packet Scheduling, i.e. choose

    one priority queue for transmission. Determine if retransmission is

    needed.

    New transmission.

    Perform Link Adaptation. Build MAC-hs PDU.

    Retransmission No need for LA. Use same MAC-hs PDU.

    Perform Power Control for HS-SCCH.

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    21 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    HSDPA Protocol Model

    MAC-d flow UE-specific 1:1 with FP entity 1:1 with AAL2 connection Up to 8 MAC-d flows per UE RAN05: 1 MAC-d flow per UE

    HS-DSCH Transport channel Shared by the UEs in the cell

    Controlled by MAC-hs Between BTS and UE(s)

    HS-PDSCH 0 to 15 per cell

    RAN05: max. 5 per HSDPA cell HS-SCCH, HS-DPCCH

    In the figure, the SRNC and DRNC areco-incident. This is always the case in

    RAN05 which has no Iur for HSDPA.

    TNL

    MAC-d

    DCHFP

    DCHFP

    MAC-d

    TNL

    BTS Iub RNC

    RLC RLC

    PHY PHY

    UE Uu

    DCH

    DPCH

    MAC-hs

    PHY PHY TNL

    MAC-d

    MAC-hsHS-DSCH

    FP

    HS-DSCH

    FP

    MAC-d

    TNL

    UE Uu BTS Iub RNC

    RLC RLC

    MAC-d flow

    HS-DSCH

    HS-PDSCH

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    22 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    UE

    HSDPA Protocol Model

    Transport chsPhysical chs

    HS-DSCH

    HS-PDSCH

    HS-SCCH

    HS-DPCCH

    DPDCH

    DPCCH

    DTCH #1

    DTCH #2

    MAC-d flow #1

    MAC-d flow #2

    MAC-d flow #8

    DCH

    Up to 8 MAC-d flows can be mapped to one UE (3GPP)

    In RAN05 only one MAC-d flow per UE is possible

    Logical chs

    HSDPA

    DCH

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    23 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    Physical Channels for One HSDPA UE

    UE

    BTS

    Associat

    ed

    DPCH

    Associat

    ed

    DPCH

    1-

    15

    xH

    S-

    PDSCH

    1-

    4

    xH

    S-

    SCCH

    HS-D

    PCCH

    DL CHANNELS HS-PDSCH: High-Speed Physical

    Downlink Shared Channel

    HS-SCCH: High-Speed Shared Control

    Channel Associated DPCH, Dedicated Physical

    Channel.

    UL CHANNELS

    Associated DPCH, Dedicated PhysicalChannel

    HS-DPCCH: High-Speed DedicatedPhysical Control Channel

    Rel99DCH

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    24 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    HSDPA DL physical channels

    HS-SCCH: High-Speed Shared ControlChannel

    Includes information to tell the UE howto decode the next HS-PDSCH frame

    Fixed SF128 Nokia implementation has power

    control Shares downlink power with the HS-

    PDSCH More than one HS-SCCH required when

    code multiplexing is used

    Field Number ofuncoded bits

    Channelisation code set information 7 bits

    Modulation scheme information 1 bit

    Transport block size information 6 bits

    Hybrid ARQ process information 3 bits

    Redundancy and constellation version 3 bits

    New data indicator 1 bit

    UE identity 16 bits

    HS-PDSCH: High-Speed Physical Downlink Shared Channel Transfers actual HSDPA data of HS-DSCH transport channel. 1-15 code channels. QPSK or 16QAM modulation. Divided into 2ms TTIs

    Fixed SF16 Doesnt have power control

    h i l h l

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    25 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    HSDPA DL physical channels Associated DPCH, Dedicated Physical Channel

    Transfers signalling (Signalling Radio Bearer (SRB)) information e.g.RRC measurement control messages

    Power control commands for associated UL DCH DPCH needed for each HSDPA UE.

    No SHO support in RAN05 (coming in RAN05.1)

    HSDPA UL h i l h l

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    26 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

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

    Associated DPCH, Dedicated Physical Channel DPCH needed for each HSDPA UE. Transfers signalling Also transfers uplink data 64, 128, 384kbps, e.g. TCP acks No SHO support in RAN05 (coming in RAN05.1)

    HSDPA UL physical channels

    Ph i l h l t t

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    27 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    Physical channel structure

    HS-PDSCH #2UE1

    UE2

    UE2

    UE2

    UE1

    UE1

    UE1

    HS-PDSCH #1UE1

    UE2

    UE2

    UE2

    UE1

    UE3

    UE3

    UE3

    UE1

    UE1

    HS-PDSCH #3UE1

    UE1

    UE1

    UE1

    UE #1

    UE #2

    UE #3

    2 ms

    1 radio frame (15 slots, total 10 ms)

    151413121110987654321

    Subframe #5Subframe #4Subframe #3Subframe #2Subframe #1

    HS-SCCHUE1

    UE2

    UE2

    UE2

    UE1

    UE3

    UE3

    UE3

    UE1

    UE1

    User data onHS-DSCH

    HS-DPCCHL1 feedback

    3 slots

    2 slots

    HS-DPCCHL1 feedback

    HS-DPCCHL1 feedback

    3GPP enablestime and codemultiplexing.

    Picture presentstime multiplexing

    C d M lti l i ( t i RAN05/5 1)

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    28 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    HS-PDSCH

    HS-PDSCH

    HS-PDSCHHS-PDSCH

    Code Multiplexing (not in RAN05/5.1)

    With Code Multiplexing, multiple UEscan be scheduled during one TTI.

    Multiple HS-SCCH channels One for each simultaneously

    receiving UE. HS-SCCH power overhead.

    HS-PDSCH codes divided for differenttransport blocks.

    Multiple simultaneous transport blocksto one UE not possible.

    Important when cell supports morecodes than UEs do. For example 10codes per cell, UE category 6.

    How to divide HS-PDSCH powerbetween simultaneous UEs?

    Packet Scheduling algorithm?

    HS-PDSCH

    cat 6

    HS-PDSCH

    HS-PDSCH

    HS-PDSCHHS-PDSCH

    HS-PDSCH

    HS-SCCHHS-SCCH

    cat 6 cat 6 cat 6cat 8

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    29 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    SF = 128

    SF = 256

    SF = 64

    SF = 32

    SF = 8

    SF = 16

    SF = 4

    SF = 2

    SF = 1

    Codes for the cell common channels

    Code for one

    HS-SCCH

    Codes for 5

    HS-PDSCH's

    Downlink Code Allocation

    166 codes @ SF=256 available for the associated DCHs and non-HSDPA uses

    HSDPA with 5 codes allocated at cell MAC-hs start-up when HSDPA is enabled

    Code allocation is dynamic in future releases when more than 5 codes are allocated

    DL DCH Spreading Factor (Nemo)

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    30 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    DL DCH Spreading Factor (Nemo)

    DCH 384kbps

    DCH 128kbps

    DCH 64kbps

    SRB 13.6kbps (During Call Setup)

    Associated DL DPCH (for SRB, 3.4bkps)

    Channel Allocation in WSPC

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    31 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    Channel Allocation in WSPC

    Wideband Signal Processing unit (WSPC) is a flexible software based cardhandling both uplink and downlink channels

    WSPC can handle common channels for 3 carriers and user data accordingto base band processing capacity tables

    HSDPA block is able to handle up to 3 cells (time multiplexed) and isallocated to one WSPC card

    Common chs

    remainingcapacity

    48 CE

    Carrier 1Carrier 1Common channels

    Carrier 1Carrier 1

    Carrier 1Carrier 1

    .

    Traffic channels

    1. WSPC 2. WSPC Nth WSPC

    remainingcapacity

    32 CE

    capacity64 CE

    HSDPA BLOCK(5codes)Reserved

    by RRM = 32CE

    Same type WSPC

    handles common andHSDPA channels

    = R5 HSDPA

    = R99 DCH

    Customer Confidential

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    32 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    PtxtargetHSDPA AND PtxoffsetHSDPA

    STRATEGY:1) The ratio between PC headroom and Variable Power shall remain the same after the introduction of HSDPA becauseHSDPA does not require any power control headroom

    2) When HSDPA power is allocated DCH Power increases to to keep BLER targets, so in order to avoid HSDPA power to beallocated and soon released DCH power increase

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    33 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    Power Allocation (CHT)

    PtxmaxHSDPA

    CPICHCPICH

    20W

    12W

    43dBm

    40.8dBm

    39.8dBm

    33dBm2W

    9.5W

    8W

    PtxoffsetHSDPA

    2W 33 dBm

    15.8W

    20W

    42 dBm

    43 dBm

    DCH + Variablepart of CCHs

    PtxTargetHSDPADCH + Variablepart of CCHs

    Ptxoffset

    PtxTarget

    HSDPAPriority =1

    HW Requirements (CHT)

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    HW Requirements (CHT)

    Sf16(11-15)5HSDPA Code allocation

    1 DMCU=4 DMPG=4*6 HSDPA sites=4*16HSDPA users

    RNC Step5: 4RNC Step4: 3

    RNC Step3: 2

    Initial DMCU Allocation

    2 WSPC => 2E1

    3 WSPC => 3E12E1Min Required E1

    32CEs reserved for CCH

    32CEs reserved for HSDPA128Min Required CE

    Max HSDPA allocation: 3 Cell/siteSupreme/Optima/Metro50Node B

    8WPwr allocation for HSDPA

    40W/SecMin Required WPA

    10762: DCH

    10787: HSDPA+DCH(Rel5UE)

    2 Carrier

    (10762, 10787)Carrier

    RemarkRequirement

    Deployment Strategy

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    35 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    Deployment Strategy-Co-existence of R'99 and R5 HSDPA

    Case 1: Carrier shared between R5 HSDPA and R'99

    Operator definable resource sharing between R5 HSDPA

    and R'99. Most likely initial network setup:

    cost efficiency

    Simple parameter planning (traffic handling)

    Capacity (additional load from HSDPA) Impact existing R'99 performance (Ec/No quality

    degradation)

    F1 (R99+R5)F1 (R99+R5)

    = R5 HSDPA + R5 DCH= R'99 DCH

    Deployment Strategy

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    36 NOKIA HSDPA General Workshop / MHL /2006 Sept Company Confidential

    Deployment Strategy- Dedicated Carrier for HSDPA

    F1 R99F1 R99

    F2 R5F2 R5

    Case2: Dedicated R5 (HSDPA+DCH) carrier

    R5 UE (HSDPA + DCH) directed to R5 HSDPA

    carrier Recommended for hotspot, indoor, majorcorporate customer office etc.

    Minimum Impact to existing system (capacity andperformance) than case 1.

    Guarantee certain level of HSDPA performance More complex parameter planning (DRRC, UE

    capability, IFHO)

    Control to have only R5 (HSDPA + DCH) on f2(trigger point for inter-Frequency HO for realtime

    etc.)

    = R5 HSDPA + R5 DCH= R'99 DCH

    Used in CHT Project

    Directed RRC Connection Setup for HSDPA

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    Directed RRC Connection Setup for HSDPA

    DirectedRRCEnabled

    The parameter enables/disables the use of directed RRC connection setup ordirected RRC connection setup for HSDPA layer in the cell.

    0: Directed RRC connection setup is not enabled in the cell

    1: Directed RRC connection setup is enabled in the cell

    2: Directed RRC connection setup for HSDPA layer is enabled in the cell

    Mobility Handling Scheme

    ADJI (f2 -> f1) Planning- Include own sites f1 cells

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    Mobility Handling Scheme

    2G

    HSDPA DRRCIFHO (f2->f1)

    -RT: RSCP (-95dBm) &Ec/No (-12dB)

    -NRT: RSCP (-95dBm)

    -Oneway adji

    IFHO (f1->f2)

    RT/NRT: disabledxNo IFCR (f1 -> f2)

    - No adji (f1->f2)

    XNo ISCR

    No ADJG (f2->2G)

    ISCR

    F1 -> 2G

    2G -> 3G

    ISHO (RT)

    F1 -> 2G : Ec/No, RSCP

    Ec/No: -12 dB

    RSCP: -105 dBm

    CCO (NRT)

    F1 -> 2G : RSCP

    RSCP: -115

    UMTS F2 (HSDPA Enabled)

    UMTS F1 (DCH)

    ISHO (f2->2G)

    -RT/NRT: Disabled

    IFCR (f2->f1)

    -Oneway adji

    (same as IFHO)

    R99UER5UE

    Include own site s f1 cells.- Plan up to 2~3 tier sitesdepending on f2spropagation.

    X

    X

    Concern:

    If a HSDPA UE performs IFHO from f2 to f1, the UE cannot get HSDPA allocation again in f1 during the call. It has to

    disconnect and re-establish the RRC setup for PS call (using HSDPA DRRC) in order to get HSDPA allocation again.

    This is due to current HSDPA resumption timer works only within the same layer with HSDPA enabled cells.

    Mobility Handling Scheme

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    Mobility Handling Scheme

    Assumption F1 (HSDPA disabled), F2( HSDPA enabled)

    HSDPA DRRC This brings Rel5 UE to F2, and Rel99 UE to F1 during RRC Con Setup.

    ISHO / ISCR ISHO is only allowed from F1 to 2G.

    RT: RSCP (-105dBm) & Ec/No (-12dB) NRT: RSCP (-115dBm)

    ISHO from F2 not allowed. It will first move down to F1, since F1 has continuouscoverage.

    ISCR is also allowed from F1 to 2G, since F2 does not have ADJG to 2G. IFHO / IFCR

    IFHO is only allowed from F2 to F1 RT: RSCP (-95dBm) & Ec/No (-12dB) NRT: RSCP (-95dBm)

    IFCR is also allowed from F2 to F1 only, since no ADJI from F1 to F2 defined. Neighbor Planning

    ADJS: F1~F1, F2~F2 ADJI: F2F1 ADJG: F12G

    HSDPA mobility in RAS05 CD1 (1)

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    - HSDPA Serving Cell Change

    HSDPA Serving Cell Change

    HSDPA (serving cell) -> MR(e1a, serving cell) -> Cell_FACH (Target Cell) -> HSDPA (Target Cell)

    HS-DSCH coverage HS-DSCH coverage

    Service in

    HSDPA(Serving Cell)

    Switching to

    Cell_FACH (Target

    Cell) within the

    SHO area

    UE on HS-DSCH(Target Cell)

    Cell A Cell B

    HSDPA

    DCH

    0

    Throughput

    64kbps

    128kbps or 384kbps according to parameter settings

    HSDPA mobility in RAS05 CD1 (1)

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    - HSDPA Resumption Timer

    HSDPA resumption timer switchesthe user from DCH to HS-DSCH,

    when UE enters HSDPA area

    The conditions preventing HSDPA allocation in HSPDAcoverage area to HSDPA capable UE are:

    More than one serving cell (Soft Handover)

    Multi-RAB combination (not supported)

    Lack of HSDPA capacity in the cell

    R99 coverage HS-DSCH coverage

    Service

    NRT DCH

    Switching to

    HS-DSCH when

    not in SHO area

    Cell A Cell B

    HSDPA

    DCH

    0

    Throughput

    64kbps (initial bitrate)

    128kbps or 384kbps according to parameter settings

    Download

    complete

    Resumption timer

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    Resumption timer

    RNP parameter in RNC. Timer started when HSDPA

    capable UE having DCH NRTenters into HSDPA capable cell

    and Active set size=1.

    Switching to HS-DSCH is triedafter the timer expires, if theActive set size is still 1.

    Switching happens viaDCH0/0.

    Normal HSDPA selection

    procedure is applied after acapacity request, whenDCH0/0 is allocated.

    Resumption timerDCH t HS DSCH it h

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    - DCH to HS-DSCH switch

    Resumption timer startedwhen Active set size =1.

    Resumption timer value inthis case 4s.

    Switching to HS-DSCH triedafter the timer expires.

    Application throughput

    0

    500000

    1000000

    1500000

    0 10 20 30 40 50s

    bps

    "MEASUREMENT_CONTROL"DCCH08:33.1RRCD

    "RADIO_BEARER_RECONFIGURATION_COMPLETE"DCCH08:32.8RRCU

    "MEASUREMENT_REPORT"DCCH08:32.8RRCU

    "RADIO_BEARER_RECONFIGURATION"DCCH08:31.7RRCD

    "MEASUREMENT_REPORT"DCCH08:30.7RRCU

    "MEASUREMENT_CONTROL"DCCH08:30.7RRCD

    "RADIO_BEARER_RECONFIGURATION_COMPLETE"DCCH08:30.5RRCU

    "RADIO_BEARER_RECONFIGURATION"DCCH08:29.3RRCD

    "MEASUREMENT_CONTROL"DCCH08:25.1RRCD

    "ACTIVE_SET_UPDATE_COMPLETE"DCCH08:24.8RRCU

    "ACTIVE_SET_UPDATE"DCCH08:24.8RRCD

    MessageSubchannelTimeEventIdActive set size=1 after this Active Set

    Update (no SHO anymore).

    Resumption timer started.

    RB reconfiguration to DCH0/0.

    4s resumption timer applied before.

    RB reconfiguration to HS-DSCH

    ~2.5 seconds gap accordingsignaling. The data gap is about 6s

    when measured with Ethereal.

    DCH NRT HS-DSCH