1. no RRC:CELL UPDATE message is received
from the UE -> the Iu release request
with a cause value ‘Radio Connection
With UE Lost’ is sent to the PS-CN
T_L1_Sync_ReEstab_W
RRC_ConnRe- RRC: CELL
Timer T_RLFAILURE ait –timer started Next
Next
in RNC = 2s estabTmr –timer UPDATE slide
slide
started expired received
N_OUTSYNC_IND “out of sync” Timer
indicators = 8 T_RLFAILURE T_L1_Sync_ReEs
expires = 2s tab_Wait – RRC_ConnRe-estabTmr
Timer T313 timer expired -timer started: T315 +
expires (T302*N302)
NRT
Timer T313 Radio Link If T315 > 0, the
started Failure RT T315 value is waiting of RRC
waiting of RRC
“out of sync”
“out of sync” RT checked connection re-
connection re-
indicators
indicators NRT RNC receives establishment is
establishment is
RNC receives If T315 = 0, then
NBAP:RADIO
NBAP:RADIO initiated
initiated
Re- LINK FAILURE
LINK FAILURE
all NRT radio
bearers (also the
All the RT radio bearers
are released and Iu
–message
–message (also the
N313 amount of establishmen form BTS
form BTS RT RB(s), if existing)
RT RB(s), existing) release request with a
“out of sync” When the criteria for radio link are released locally
are released locally cause value ‘Failure in
failure timer T315
t are fulfilled. with a cause
indicators value and the Iu release
and the Iu release Radio Interface
Cell value
The timer is started only if radio Procedure’ is sent to the
Reselection started
bearer(s) that are associated with
"Synchronizati
on Failure"
request with a cause
request with a cause
value ‘Radio
value ‘Radio CS-CN
Next on Failure"
Next T315 exist. NRT radio bearers are Connection With UE
Connection With UE
slide
slide associated with T315 Lost’’ is sent to the
Lost is T315
T302 running =>
PS CN(s)
PS CN(s) expired
continue to wait
continue to wait T302 not
response to cell
response to cell
update, according
update, according
running =>
to T302
to enter idle mode
T314 value re- No re- The Iu release
The Iu release
is checked, establishme RT RBs T314 value is establishment request with a
request
T314 = 0s nt for RT release checked, T314 = for RT
cause value
cause value
in d 0s in current ‘Failure in Radio
‘Failure in Radio
current services=0 services in Interface
Interface
Soc Classification level locally release
release current Procedure’ is
Procedure is
1 © Nokia Siemens Networks
release sent to the CN,
sent to the CN,