enhanced concentric cell

* (etwor) +ptii,ation o% the (etwor) +ptii,ation o% the Concentric Cell Concentric Cell

*.1 (etwor) +ptii,ation $trategy %or a

*.1 (etwor) +ptii,ation $trategy %or a (oral Concentric Cell

(oral Concentric Cell

Fi!ure '&'

Fi!ure '&' lists the net.or/ o1timi:ation 1arameters for a normal concentric cell& lists the net.or/ o1timi:ation 1arameters for a normal concentric cell&

"igure 1.1

"igure 1.1 Net Net.or.or/ o1/ o1timitimi:ati:ation on 1ar1arametameters ers for for a ca commoommon con concenncentric tric cellcell P

Paarraaeetteerr CCoonn@@gguurraattiioon n $$uuggggeessttiioonnss UO Si!nal Stren!th

UO Si!nal Stren!th +ifference

+ifference

Set this 1arameter >ased on the site measurement or the transmit Set this 1arameter >ased on the site measurement or the transmit  1o.er diff

 1o.er difference at the 0F erence at the 0F 1ort >et.een the ove1ort >et.een the overlaid and underlairlaid and underlaidd su>cells&

su>cells&

0

0LL; ; ThThrsrsh&h& GeGenenerarallyllyA A itits vs valalue ue is is e?e?uaual tl to to the he eded!e !e hahandndovover er lelevevel tl thrhresesholholdd su>tracted >y the UO Si!nal Stren!th +ifference& ou should adDust su>tracted >y the UO Si!nal Stren!th +ifference& ou should adDust this value >ased on the actual terrain and traffic distri>ution&

this value >ased on the actual terrain and traffic distri>ution&

0

0LL; ; 6y6yststereresesisis ThThe de defefauault lt vavalulue ie iss33& Increase this value & Increase this value if the overlaid4underlaidif the overlaid4underlaid handover is >usy or

handover is >usy or decrease this value if the decrease this value if the overlaid4underloverlaid4underlaidaid handover is difficult&

handover is difficult&

0

0HU,HU,L L ThrThrsh&sh& GeGenernerallallyyA yA you aou are are advidvised sed to dto disaisa>le >le the the ?ua?ualitlity thy thresresholhold ded deciscisionion  >y clearin! the

 >y clearin! the/AL )or Concentric Cell H$ Allowed/AL )or Concentric Cell H$ Allowed feature& ;na>le the ?uality threshold decision only .hen you are feature& ;na>le the ?uality threshold decision only .hen you are sure that the underlaid interference is

sure that the underlaid interference is smaller than the overlaidsmaller than the overlaid interference&

interference&

T

T, , TThhrrsshh&& ,,s s iit t iis s nnoot t 11rreecciisse e aannd d fflleeii>>lle e tto o uusse e TT, , tto o ddeetteerrmmiinne e tthhee overlaid8underlaid >oundary

overlaid8underlaid >oundaryA you are A you are advised to set advised to set the 1arameterthe 1arameter to its maimum value to d

to its maimum value to disa>le its function&isa>le its function&

T

T, , 66yysstteerreessiiss TThhe e ddeeffaauullt t vvaalluue e iiss&&

*.2 (etwor) optii,ation strategy %or an

*.2 (etwor) optii,ation strategy %or an enhanced concentric cell

enhanced concentric cell

Fi!ure '&'

Fi!ure '&' lists  lists the net.or/ o1timi:ation 1arameters for an enhanced concentric cell&the net.or/ o1timi:ation 1arameters for an enhanced concentric cell&

2

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"igure 1.1

"igure 1.1 Net Net.or.or/ o1/ o1timitimi:ati:ation on 1ar1arametameters ers for for an an enhaenhancenced cd conceoncentrintric cec cellll P

Pararaaeteterer CoCon@n@guguraratition $on $uguggegeststioionsns OL to UL 6O

GenerallyA its value is A its value is e?ual to the e?ual to the ed!e handover level thresholded!e handover level threshold

su>tracted >y the UO Si!nal Stren!th +ifference& ou should adDust this su>tracted >y the UO Si!nal Stren!th +ifference& ou should adDust this value >ased on the

value >ased on the actual terrain and traffic distri>ution&actual terrain and traffic distri>ution&

UL to OL 6O

GenerallyA this value is A this value is !reater than that of !reater than that of the OL to UL 6O 0eceivedthe OL to UL 6O 0eceived Level Thrsh& 

Level Thrsh& ou should adDust this value ou should adDust this value >ased on the actual >ased on the actual terrain andterrain and traffic distri>ution&

GenerallyA you are advised to A you are advised to disa>le the ?uality threshold disa>le the ?uality threshold decision >ydecision >y clearin! the

clearin! the /AL )or Concentric Cell H$ Allowed/AL )or Concentric Cell H$ Allowed feature& feature&

;na>le the ?uality threshold decision only .hen you are sure that the

;na>le the ?uality threshold decision only .hen you are sure that the underlaid interference is smaller than the overlaid interference&

underlaid interference is smaller than the overlaid interference&

T

T, , TThrhrshsh&& ,s ,s it it is is nonot 1t 1rerecicise se anand fd fleleii>l>le te to uo use se TT, , to to dedetetermrminine te thehe overlaid8underlai

overlaid8underlaid >oundaryA you are advised to set d >oundaryA you are advised to set the 1arameter to itsthe 1arameter to its maimum value to disa>le its function&

maimum value to disa>le its function&

T

Set this 1arameter >ased on the num>er of T0s confi!ured in the Set this 1arameter >ased on the num>er of T0s confi!ured in the overlaid8underlai

overlaid8underlaid su>cells and d su>cells and the traffic distri>ution& If there are the traffic distri>ution& If there are manymany TC6s in the underlaid su>cellA set the 1arameter to a >i!

TC6s in the underlaid su>cellA set the 1arameter to a >i! value other.iseAvalue other.iseA set the 1arameter to a small value&

set the 1arameter to a small value&

Underlaid

Set this 1arameter >ased on the actual traffic load in the Set this 1arameter >ased on the actual traffic load in the overlaid8underlai

overlaid8underlaid su>cells& Settin! a d su>cells& Settin! a small value increases the handoversmall value increases the handover s1eedA >ut increases the system loadA .hich may lead to unnecessary load s1eedA >ut increases the system loadA .hich may lead to unnecessary load handover&

Set this 1arameter >ased on the actual traffic load in the Set this 1arameter >ased on the actual traffic load in the overlaid8underlai

overlaid8underlaid su>cells& Settin! a d su>cells& Settin! a small value increases the handoversmall value increases the handover s1eedA >ut increases the system loadA .hich may lead to unnecessary load s1eedA >ut increases the system loadA .hich may lead to unnecessary load handover&

Set this 1arameter >ased on the actual traffic load in the Set this 1arameter >ased on the actual traffic load in the overlaid8underlai

overlaid8underlaid su>cells& Settin! a d su>cells& Settin! a >i! value reduces the load>i! value reduces the load handoversA >ut may lead to

handoversA >ut may lead to underlaid con!estion&underlaid con!estion&

2

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-- Ipact o% Concentric Cell on Ipact o% Concentric Cell on Coverage Per%orance Coverage Per%orance

Concentric cell technolo!y uses the underlaid su>cell

Concentric cell technolo!y uses the underlaid su>cell to !uarantee covera!e thusA theto !uarantee covera!e thusA the covera!e 1erformanc

covera!e 1erformance >et.een the concentric cell and e >et.een the concentric cell and normal cell is normal cell is the same&the same&



 Ipact o% the Concentric Cell on Ipact o% the Concentric Cell on