Init Ial C Ell Sele Ction; Und Eclare D C Ell R E- Se Lection - Aeroflex 3900 Series Option Manual

The mobil e's Cell R e-sel ection de ci sion also takes int o account w hethe r the ne ighbor ing cells off er a
bett er of ser vice t han t he se rving cell.
I f t h e s e r v i c e l e ve l s a r e t h e s a m e i n e a c h c e l l , w h ic h i s t h e c a s e w i t h t h e t w o T e s t S e t s , t h e
m ob i l e sh o u l d p e r f o r m C e l l R e - s e l e c t i o n i f t h e s e r v i n g c e l l i s i m p r o v a b l e .
I f t h e s e r v i c e l e ve l i n t h e n e i g h b o r i n g c e l l i s w o r s e , t h e m o b i l e s h o u l d o n l y p e r f o r m C e l l R e -
s e l ec t i o n i f t h e s e r v i n g c e l l i s r e l i n q u i s h a b l e .
I f t h e se r vi c e l e v e l i n t h e n e i g h b o r i n g c e l l i s b e t t er , t h e m o b i l e s h o u l d p e r f o r m C e l l R e -
s e l ec t i o n i f t h e n e i g h b o r i n g c e l l i s u s a b l e .
For addit ional info rmatio n on Cel l R e-sele ct ion refe r t o E N 3 00 39 2-2 sub-clau ses 18. 3.4 t o
18.3 .4.7. 5, 18.5. 4 and 23.7 .1 t o 23. 7.5. 2.3. D uri ng te sting, the mobile may pr ovide a diag nostic
display indicat ing it s calcul ated C1 and C 2 va lues - re fer to the mo bile man ufactu rer or supplie r t o
access th is inf orm at ion.
T h e v a l u e s o f C 1 a n d C 2 a r e f u r t h e r r e d u c e d i f t h e v a l u e o f t h e ' m a x i m u m T x l e v e l ' p a r a m e t e r
i s g r e a t e r t h a n t h e m o b i l e 's m a x i m u m p o w e r c a p a b i l i t y . T h e d e s c r i p t i o n s i n t h i s m a n u a l
a s su m e t h a t t h e ' m ax i m u m T x l e v e l' p a r a m e t e r i s s e t e q u a l t o o r l e s s t h a n t h e m o b i le ' s
m ax i m u m p o w e r ca p a b i l i t y , s o t h a t C 1 a n d C 2 a r e o n l y d e p e n d e n t o n t h e R S S I v a l u e s a n d t h e
' m i n i m u m R x l e v e l f o r a cc e s s ' p a r a m e t e r . S o m e m o b i l e s m a y b e c o n f i g u r e d t o c o n t i n u e
o p e r a t i n g w h e n C 1 < 0 .
I n it ia l C el l Se l ec ti o n
The mobile is allow ed to i nitial ly select any su itable cell that has a posit ive C 1 value , i. e. t he
recei ved signal level i s grea ter than the Mini mu m Rx L evel For A cce ss parame ter. If the mobile d oes
not search the fr equency b and f or suitabl e chann els, i t may select the Test Set gener atin g the MCC H
on o ne of its pre- defi ned cha nnels an d init ially ignor e th e oth er Test Set, even if the o ther Test Se t
is gen erat ing t he MC CH at a higher level. T o te st ini tial cell sel ection, ensur e t hat both Test Set s
are gener atin g MC CH , set the
mobile. T he mobil e makes i ts ini tial cell sel ection of o ne of the Test Se ts, w hich indicat es
Reg ister ed ( ITS I A tta ch). If th e mobile init ially i gnore d the Test Se t w ith the higher signa l level, it
may subseq uently perf orm undeclar ed C ell Re- s electi on if the condit ions a re sa tisfie d (se e belo w) .
Unde cl a re d Ce ll Re -s el ec ti on
When t he mobile is r egiste red on one cell ( Test S et) a nd is idle on the MC CH , (i. e. not engage d in a
call) it is re quire d to monit or t he ne ighbor ing ce lls ( other Test S et) to deter mine w het her Cell Re -
selecti on co nditio ns ar e satisfi ed. I f this is the case, it per for ms unde clared C ell Re -select ion to the
selecte d neig hbor cell ( othe r T est S et) . No signali ng is se nt t o th e ser v ing cel l (t he cur ren tly use d
Test Set ), i.e. it does n ot d eclare its intent ion o f le aving t he ser ving ce ll. The mobile perf orms
roa mi ng locat ion updati ng sign aling on th e select ed ne ighbor cell (ot her Test Set ), i.e. it is
reg isteri ng in the new locat ion ar ea that is ind icated by th e neig hbor cell ( oth er T est S et) . To t est
undecla red Ce ll R e- selectio n, ensure th at both Test S ets are gene rati ng MC C H, and th at the mobile
is r egister ed o n one of the Test Sets. S et the
satisf y the condit ions f or Cell Re -select ion an d w ait for the mobile to d ecide t o per for m unde clared
Cel l R e-sele ction. T he ot her Test Set indicat es R egiste red (R oaming Locatio n U pdate ).
T E T R A M S S y s t e m
R F Gener ator Leve l o n each Test Set as r equir ed, and sw it ch on the
RF Ge nera tor Level
5-63
on the Test Set s as r equir ed t o