Locating Pre

Embed Size (px)

Citation preview

  • 8/9/2019 Locating Pre

    1/23

     

    Initiation● Switches (on/off)

     – SCHO – SDCCH handover – ASSOC - assignment to other cell

     – IHO – intra-cell handovers

     – IHOSICH - Intra-cell handover on signalling channel

     –

    IBHOASS - Inter BSC handover dring assignment – IBHOSICH - Inter BSC handover on signalling channel

     – !AS"#S$%& – fast moving #S

     – CO%'#"S – switch for I$A" (on/off BSC)

     – SBHOAC"I*% – is handover with sage of Service Indicatorallowed

    ●  "imers

     –  "I+I" – inhi,its handovers ntil it e.ires

     –  "$&%+ – inhi,its handovers ntil it e.ires when in rgenc

  • 8/9/2019 Locating Pre

    2/23

     

    #easrements

    ● $'0%* - signal strength measrement re.orts as integer vales from1 to 23 corres.onds to signal strength of -441 dBm to -56 dBm7

    ● %+HA+C%D #%AS$%#%+" $%8O$" - element SCA0% is an offsetwhich might add 941 dB to the downlin: signal strength reslting in-411 dBm to -36 dBm7

    ● $';A0 - integer vale ,etween 1 and 6 where 1 corres.onds togood

  • 8/9/2019 Locating Pre

    3/23

     

    Com.ensations

    ● BS"'8=$ - BS8=$

     – BS8=$ – ot.t .ower for BCCH

     – BS"'8=$ – ot.t .ower for other fre

  • 8/9/2019 Locating Pre

    4/23

     

    !ilters

    ● SS%*A0SI – filter choice SDCCH

    ● SS%*A0SD – filter choice "CH

    ● SS0%+SI and SS0%+SD – filter length for filters ?2-@

    ● ?4- &eneral !I$ !ilters

     – straight average filters with different windows(SACCH .eriods) 2 41 45 4E

    ● ?2 $ecrsive Straight Average !ilter

     – As !I$ ece.t for ,etter com.tational efficienc

    (minimal load on the BSC)

  • 8/9/2019 Locating Pre

    5/23

     

    !ilters ()

    ● ?6$ecrsive %.onential !ilter

     – recrsive filter with filter coefficient de.endent onSACCH .eriods

     – rlev F α rlev 9 (4-α)(ss(t))

    ● ?E $ecrsive 4st7 Order Btterworth !ilter

     – rlev F α rlev 9 (4-α)(ss(t)+ss(t-1))/2

    ● ?@ #edian !ilter

     – median vale from the set last n measrements

    ● Straight forward average filter for "A

  • 8/9/2019 Locating Pre

    6/23

     

    #inimm access re

  • 8/9/2019 Locating Pre

    7/23

     

    0ocation ran:ing● %*A0"G8% – 4 or 3

    %ricsson 4 – #S$'S!! and BS$'S!! thresholds - sfficient signal levels

    (to divide cells in - and 0- cells)

     – transition hsteresis "$HGS" and a transition offset "$O!!S%" - in cell-to-cell relation

     – Signal strength evalation (-criterion)

    ● offset O!!S%" and hsteresis HGS"

     – 8ath loss evalation (0-criterion)

    ● offset 0O!!S%" and a hsteresis 0HGS"

    ● %ricsson 3

     – HGS"S%8 – when signal strength for serving cell is high or low

     – O!!S%" 9 0OHGS" or HIHGS"

  • 8/9/2019 Locating Pre

    8/23

     

    High level im.acting featres

    ● !ast retrn to =CD#A after call release

    ● !ast retrn to 0"% after call release

    ● +C after 0"%

    ● $A"8$IO for cell

    ● H8$IO H8$IO"H$ 08$IO"H$ – hsteresis andthresholds for .rioritised $A"s

  • 8/9/2019 Locating Pre

    9/23

     

    Decisions (.riorit)

    ● rgenc - timing advance

    ● Intra-cell for B;

    ● rgenc - ,ad

  • 8/9/2019 Locating Pre

    10/23

     

    rgenc – "iming Advance

    ● 0imits

     –  "A0I# for normal cell

     –  "A0I#'O0 for etended cell ('$A+&% FG%S)

     – #A'"A (to

  • 8/9/2019 Locating Pre

    11/23

     

    Intra-cell

    ● !;SS is the

  • 8/9/2019 Locating Pre

    12/23

     

    rgenc – ,ad

  • 8/9/2019 Locating Pre

    13/23

     

    Assignment to other cell

    ● ASSOC - on or off 

    ● A= - assignment to a worse cell (on/off)7

    ● IBHOASS – assignment to other cell inter-BSC(on/off)

    A=O!!S%" - candidates for Assignment to =orseCell mst ,e stronger than crrent cell decreased, this offset

    ● CA+D – .ossi,le candidate

     – A=+ - not at normal handover7 – +H+ - to ,etter cell and at normal handover

     – BO"H - at normal handover

  • 8/9/2019 Locating Pre

    14/23

     

    High level im.acting featres

    ● !ast retrn to =CD#A after call release

    ● !ast retrn to 0"% after call release

    ● +C after 0"%

    ● $A"8$IO for cell

    H8$IO H8$IO"H$ 08$IO"H$ – hsteresis andthresholds for .rioritised $A"s

  • 8/9/2019 Locating Pre

    15/23

     

    HCS● BSC

     – 0AG%$ 80AG%$ – HCSBA+D - defines the .riorit for gro. of laers

    ● Cell

     – 0AG%$"H$ 8HCS"H$ - signal strength threshold to ran: cells indifferent laers

     – 0AG%$HGS" - hsteresis

     – HCSBA+D"H$ - signal strength threshold for HCS ,and criterion

     – #A'C%00SI+0AG%$ #A'DBD%*I+0AG%$ - nm,er of cells ofsame laer .rioritied , HCS and ma deviation from ,est one

    0oad – HCS"$A!DISS"A"% - activate HCS traffic distri,tion

     – HCSCHA*AI0"I#%$ - time for chec:ing of idle "CHs

     – HCSO" HCSI+ – limits for idle "CH to HO ot or in

  • 8/9/2019 Locating Pre

    16/23

     

    !ast moving

    ● !AS"#S$%& – on/off 

    ●  "HO - minimm time that an #S shall remain on ahigher laer cell

    ● +HO – nm,er of inter-cell handovers within "HO toconsider #S fast moving

  • 8/9/2019 Locating Pre

    17/23

     

    O0/0 strctre

    ● 0O0 - .ath loss threshold (O0)

    ●  "AO0 - timing advance threshold (O0)

    ● 0OHGS" "AO0HGS" – hsteresis for "A and 80

    ● D"CBSC – Distance to Cell Border switch (on/of)

    D"CBSCD"CB - distance (O0)● D"CBHGS" - hsteresis for distance

    ● +DIS" – additional threshold if neigh,or shold ,eon the BA list

    ● ++C%00S - nm,er of non-cosited neigh,oring cellsthat mst ,e within +DIS" from D"CB 9 D"CBHGS"of O0 s,cell to trigger a D"CB evalation

  • 8/9/2019 Locating Pre

    18/23

     

    O0/0 strctre

    ● 0O0 - .ath loss threshold (O0)

    ●  "AO0 - timing advance threshold (O0)

    ● 0OHGS" "AO0HGS" – hsteresis for "A and 80

    ● D"CBSC – Distance to Cell Border switch (on/of)

    D"CBSCD"CB - distance (O0)● D"CBHGS" - hsteresis for distance

    ● +DIS" – additional threshold if neigh,or shold ,eon the BA list

    ● ++C%00S - nm,er of non-cosited neigh,oring cellsthat mst ,e within +DIS" from D"CB 9 D"CBHGS"of O0 s,cell to trigger a D"CB evalation

  • 8/9/2019 Locating Pre

    19/23

  • 8/9/2019 Locating Pre

    20/23

  • 8/9/2019 Locating Pre

    21/23

     

    Cell 0oad Sharing

    ● &8$S8$IO on-demand 8DCHs shall ,e treated as

    idle or ,s● C0S0%*%0 - .ercentage of idle "CHs – to HO ot

    ● C0SACC - .ercentage of idle "CHs – for HO in

    HOC0SACC - incoming handover de to loadsharing (on/off)

    ● $HGS" - final hsteresis redction

    ● C0S$A#8 - interval for hsteresis to ,e ram.ed

    ● C0S"I#%I+"%$*A0- ccle time of the loadmonitoring7

  • 8/9/2019 Locating Pre

    22/23

     

    &S#-=CD#A

    ● CO%'#"S – switch for I$A" (on/off BSC)

    ● SBHOAC"I*% – is handover with sage of ServiceIndicator allowed

    ● CO%'#"S0SH – allows reJection of incominghandovers from "$A+ de to load in &S#

    ● CO%'#"S"I+" – interval for load chec:ing

    ● ;SI ;SC ;SCI – strateg for measrements inidle/active

    !DD;#I+ - minimm

  • 8/9/2019 Locating Pre

    23/23

     

    &S#-=CD#A HO

    ● !DD#$$ - K of measred neigh,oring "$A+ cell

    in measrement re.orts● ISHO0%* - traffic load threshold of the serving &S#

    cell to evalate #"S measrements

    ● #A'ISHO - defines the maimm nm,er of

    allowed handovers to trigger to "$A+ .er second● #$S0 - defines a minimm threshold for the

    L