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1 ©
NOKIA topic: GSM Measurements for Inter-RAT Cell Reselection
& an!o"er# $ul% ''(
GSM Measurementsfor Inter-RATCell Reselection & Handover
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+ ©
NOKIA topic: GSM Measurements for Inter-RAT Cell Reselection
& an!o"er# $ul% ''(
Cell Reselection and Handover
Cell Reselection Handover,one % MS in t.e/ 0circuit sitc.e!2
i!le
mo!e3 an!/pac)et i!le an! pac)et
transfer mo!eGSM cell re-selection to*C,MA ma% !i4ereteen
/non-G5RS capalemoiles3
/G5RS capale moiles3an!
/G5RS capale moileit. 5ac)et 6CC
Cell reselection to ea)er*C,MA cells is possile
an!o"er from GSM issupporte! if t.e loa! oft.e ser"in7 GSM cell
isao"e certain t.res.ol!
an! t.e measure!8ualit% 0C5IC 9c#No2from a!acent *C,MAcell is
ao"e a minimum"alue;,i4erent loa! t.res.ol!
for speec. calls an!Non-Transparent 0CS2,ata can e set;
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NOKIA topic: GSM Measurements for Inter-RAT Cell Reselection
& an!o"er# $ul% ''(
Load Reason Algorithm in RAN !"Speec. calls can e ser"e!
a!e8uatel% ot. in GSM an! =MTS; Conse8uentl%3
onl% in a .i7. loa! situations3 multiple RAT p.ones are .an!e!
o"er from GSMto =MTS; T.e numer of occupie! tra>c c.annels on
t.e a"ailale transmissionresources tri77ers t.e .an!o"er !ecision
in t.e 6SC;
Circuit sitc.e! !ata calls ma% not surpass a capacit% t.res.ol!
efore t.e 6SCimitates t.e O proce!ure;
G5RS MS can e !irectl% pus.e! to (G55 cell reselection;
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? ©
NOKIA topic: GSM Measurements for Inter-RAT Cell Reselection
& an!o"er# $ul% ''(
Load Reason Algorithm in RAN !"
1''@
'@
'@
Ser"ice ase! .an!o"ersfor non-transparent!ata to pro"i!e
maBimumuser it rates
oa! reason.an!o"ersfor speec.
of GSM cell #$ccu%ation of TCHs in TRes'
,ata to *C,MAre7ar!less of GSM loa!
,ata to *C,MAre7ar!less of GSM loa!
Speec. to *C,MAonl% it. .i7. GSM loa!
Speec. to *C,MAonl% it. .i7. GSM loa!
i7.er it ratesfor !ata users
i7.er it ratesfor !ata users
Morecapacit% for
speec.
Morecapacit% for
speec.
5ac)et 6CC parameters can e use!to pus. G5RS moiles to *C,MA
5ac)et 6CC parameters can e use!to pus. G5RS moiles to *C,MA
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NOKIA topic: GSM Measurements for Inter-RAT Cell Reselection
& an!o"er# $ul%
Cell Reselection Algorithm from GSM to
())-Cell Reselect ion List
*C,MA measurements3 .en:RLA+C ,search+I #Non GRS'
If3 for suitale =MTS cell& for a perio! of + s:
CICH RSC . RLA+C / ())+,o0set
CICH 1c2No ())+,min
no prioritieseteen*C,MA
nei7.ours
Measurement =p!ates:
/ RCDC "alue of t.e ser"in7 cell/ at least <
stron7est non ser"in7
at least e"er% + s
c.ec)
an!*C,MA cellreselection
3CCH4 FDD _Qmin, FDD _Qof f set
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8/18/2019 GSM Measurement for IRAT HO & Cell Reselection
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NOKIA topic: GSM Measurements for Inter-RAT Cell Reselection
& an!o"er# $ul%
15am%le4 cs Cell-Reselection to a Stronger *
,search+I #e!g! 678 d3m'
+ secon!s
Cellreselec
tion
time
())+,o0set#e!g! 8 d3'
Start
*C)MAmeasureme
nts
ServingGSM cell
Non servingneigh9ourGSM cell
Suita9le neigh9ou
*C)MA cell
CICH
1c2No())+,min
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7/121( © NOKIA topic: GSM Measurements for Inter-RAT Cell
Reselection & an!o"er# $ul%
15am%le4 %s Cell-Reselection to a *ea:er *C
time
,search+ #e!g! 6;< d3m'
Start*C)MA
measureme
nts
())+GRS+,o0set#e!g! -8 d3'
Cellreselec
tion
CICH
1c2No())+,min
+ secon!s
Serving
GSM cell
Non serving
neigh9ourGSM cell
Suita9le neigh9our*C)MA cell
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8/18/2019 GSM Measurement for IRAT HO & Cell Reselection
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NOKIA topic: GSM Measurements for Inter-RAT Cell Reselection
& an!o"er# $ul%
Handover rocess incl! RAN !"
an!o"er Tri77erin7 T.res.ol!s set in 6SCan!o"er Tri77erin7
T.res.ol!s set in 6SC
Inter-RAT measurements .en: T.e RL1> of t.e ser"in7
cell is ao"e or
elo t.e 7i"en t.res.ol! ,search+C
Inter-RAT measurements .en: T.e RL1> of t.e ser"in7
cell is ao"e or
elo t.e 7i"en t.res.ol! ,search+C
an!o"er ,ecision is !one in case of / oa! of t.e
ser"in7 cell Load+Threshold
/ an! C5IC 9c#No min 1c2No Threshold
an!o"er ,ecision is !one in case of / oa! of t.e
ser"in7 cell Load+Threshold
/ an! C5IC 9c#No min 1c2No Threshold
MS reports est =TRAN cell ase!on measurement results
MS reports est =TRAN cell ase!on measurement results
an!o"er comman! is sen! to MSCan!o"er comman! is sen! to MSC
atest after + s0one *C,MA an!2
oe"er in S1';+ MS ismeasurin7 t.e =TRAN cellscontinuousl% if
t.e% are!eJne! as a nei7.our3measurements are !one
!urin7 i!le perio!s
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NOKIA topic: GSM Measurements for Inter-RAT Cell Reselection
& an!o"er# $ul%
15am%le4 Handover to a *ea:er *C)MA Cell
,search+C
Serving GSM cell
Non servingneigh9ourGSM cell
Suita9le neigh9our*C)MA cell
())+,o0set#?
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' ©
NOKIA topic: GSM Measurements for Inter-RAT Cell Reselection
& an!o"er# $ul%
GSM ISH$ in RAN!"4 15am%le
/ oa! T.res.ol! for Speec. Calls inter-RAT an!o"er/
L$A)+THR1SH$L)+($R+SC+IS+H$ '@
/ Min 9c#No t.res.ol! for a .an!o"er to t.e =TRAN a!acent
cell/ MIN+1CN$+THRSH$L) -1+ !6
/ Esearc.Dc 1+ 0if Esearc.Dc 1+3 t.e moile is not alloe!
to measure =TRAN a!acent cells an! t.erefore t.e 6SS !oesnot
sen! t.e Measurement Information messa7e to t.e moileat all2
1 oa! of t.e ser"in7 cell H+@ an! t.e measure! 9c#No - '!6
-- an!o"er to t.e =TRAN not possile !ue to lo loa! an!lo
9c#No
oa! of t.e ser"in7 cell H+@ an! t.e measure! 9c#No - 1'!6
-- an!o"er to t.e =TRAN not possile !ue to lo loa!
( oa! of t.e ser"in7 cell +@ an! t.e measure! 9c#No -1'
Handover e5am%le #s%eech2Trans%arent data'-
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