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1 NOKIA topic: RRC Modes , System Information and Paging/ July 2003 /Markus Wimmer
RRC Modes,
System Information,
Paging, and
Update Procedures
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Part I
RRC Modes
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RRC Modes
Release RRC
Connection
Release RRC
Connection
Establish RRC
Connection
URA_PCH
CELL_DCH
CELL_FACH
CELL_PCH
Establish RRC
Connection
UTRA RRC Connected Mode
Idle Mode
GSM
Connected
Mode
GPRS Packet
Transfer
Mode
(UE camps on UTRAN cell)
Release RR
Connection
Establish RR
Connection
GSM-UMTS Handover
UTRA: Inter-RAT Handover
(MS in GPRS
Packet Idle Mode)
Cell
Resele-
ction
Initiation
of a TBF
Release
of a
TBF
(MS camps on a GERAN cell)
(adopted from TS 25.331 V3.12.0)
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7 NOKIA topic: RRC Modes , System Information and Paging/ July 2003 /Markus Wimmer
CELL_DCH State
active set
cell
active set
cell
DCCH and if configured DTCH
Dedicate physical channel in use
UE location known on active set cell level
UE responsible for measurement reporting
Cell system information on BCCH
RRC messages on DCCH
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CELL_FACH State
serving
cell
DCCH and if configured DTCH
FACH used for higher layer data transfer,
UE monitors FACH permanently
Uplink transmission on RACH
UE location known on serving cell level
UE performs cell re-selection
UE responsible for measurement reporting
Cell system information on BCCH
RRC messages on BCCH, CCCH and DCCH
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CELL_PCH and URA_PCH State
URA UTRAN Registration Area
URA 1
URA 2URA 3
RNCsupply
area
one or several cells
independent from LA /RA
no DCCH and DTCH
Before uplink transmissionUE moves to CELL_FACH
UE must be paged
RRC messages on BCCH and PCCH
In CELL_PCH
- UE location known on cell level
- UE performs cell re-selection and cell updates
In CELL URA
- UE location known on URA level
- UE performs cell re-selection and URA updates
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States of Bearer Allocation
Both Cell_FACH and
CELL_DCH possible
Real time and
non-real time bearers
allocated
RRC connection
(no bearers allocated)
irst RT bearer
setup
Last RT bearer
released
Real time bearer(s)
allocated
Non-real time
bearer(s) allocated
Last NRT
bearer released
Last NRT bearer
released
Last RT bearer
released
First NRT bearer
setup
NRT
bearer
setup
RT
bearer
setup
RT or NRT
bearer setup
RT bearer setup
NRT bearer
setup
RRC connection
established
RRC connection
released
Only CELL_DCH
allocation possible
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14 NOKIA topic: RRC Modes , System Information and Paging/ July 2003 /Markus Wimmer
Nokia Parameters for the UTRAN Registration Area (URA)
WCEL: URAId
The URA identity is the identity of the UTRAN Registration Area. Overlapping URAs can be defined. A maximum
of eight URA identities can be defined per cell. This parameter is part of System Information Block 2.[1 ... 65535], step 1.
WCEL: URAIdList
A list of URA identities. A maximum of 8 URA identities can be defined per cell. The first URA-ID in the URA-ID
list is a master URA-ID, which is given to all mobile stations in this cell. This parameter is part of System
Information Block 2.
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15 NOKIA topic: RRC Modes , System Information and Paging/ July 2003 /Markus Wimmer
Part II
System Information and
RRC Modes
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System Information
SIB broadcasted information read
scope/
modification
SIB 7 UL interference level
Dynamic persistence level
(fast changing parameters)
RRC idle mode,
CELL_FACH, CELL_PCH,URA_PCH
cell/
max(32, 8 * Expir-
ation Time Factor)
valid
RRC idle mode,
CELL_FACH, CELL_PCH,URA_PCH
SIB 11 Measurement control
information
RRC idle mode,
(CELL_FACH, CELL_PCH,
URA_PCH)
cell/
value tag
RRC idle mode,
(CELL_DCH, CELL_FACH,
CELL_PCH, URA_PCH)
SIB 12 Measurement control
information for UEs in the
RRC connected mode
CELL_FACH, CELL_PCH,
URA_PCH
cell/
value tag
CELL_DCH, CELL_FACH,
CELL_PCH, URA_PCH
SIB 16 RB, TrCH, and PhyCH
parameters for a
GSM/GPRS-UMTS HO
RRC idle mode,
CELL_FACH, CELL_PCH,
URA_PCH
cell/
value tag
RRC idle mode,
CELL_FACH, CELL_PCH,
URA_PCH)
(adopted from TS 25.331 V3.12.0)
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25 NOKIA topic: RRC Modes , System Information and Paging/ July 2003 /Markus Wimmer
Modification of SIBs using a Value Tag
Node B
UTRAN
Paging Type 1 ( )
(all paging occasions)
UE
RNC
System Information Change Indication ( )
(on all FACH carrying S-CCPCHs)
I am RRC idle, or in the
CELL_PCH or
URA_PCH state
I am in the
CELL_FACH state
IE BCCH Modification Change
MIB Value tag
BCCH modification
time
SFN: 0..4088
step size: 8
1..8
OP
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26 NOKIA topic: RRC Modes , System Information and Paging/ July 2003 /Markus Wimmer
Nokia Parameters for System Information
In RAN 1.5, the SIBs 1, 2, 3, 5, 7, 11, and 12 are supported.
RNC: SIB1_priority
The priority of the system information block 1, which is used by the scheduling algorithm in the RNC to give
precedence to the SIB.
[1 ... 4], with 1 being the highest priority.
Similar Nokia parameters exist for the remaining SIBs.
WCEL: SIB7factorThis parameter sets the SIB7 expiration timer for the UE according to the following formula: MAX([320ms],
SIB_REP x value of 'SIB7 expiration time factor').
[1, 2, 4, 8, 16, 32, 64, 128, 256]; default: 1.
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27 NOKIA topic: RRC Modes , System Information and Paging/ July 2003 /Markus Wimmer
Part III
Paging and RRC Modes
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29 NOKIA topic: RRC Modes , System Information and Paging/ July 2003 /Markus Wimmer
Paging
UE
RNC
Paging Type 1 [RLC-TM, PCCH]
UE
S-RNC
Paging Type 2 [RLC-AM, DCCH]
Dedicated Paging
I am RRC idle, or in the
CELL_PCH or
URA_PCH state
I am in theCELL_FACH or
CELL_DCH state
MTC
system information changes
enforced cell update
paging cause from higher layers
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33 NOKIA topic: RRC Modes , System Information and Paging/ July 2003 /Markus Wimmer
Cell Update
UE
RNC
[RLC-TM, CCCH] Cell Update
Cell Update Confirm [RLC-UM, CCCH/DCCH]
no message (no transmission)
UTRAN Mobility Information Confirm
Physical Channel Reconfiguration Complete Transport Channel Reconfiguration Complete
Radio Bearer Release Complete
Radio Bearer Channel Reconfiguration Complete
UE
RNC
[RLC-TM, CCCH] Cell Update
RRC Connection Release [RLC-UM, CCCH/DCCH]
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35 NOKIA topic: RRC Modes , System Information and Paging/ July 2003 /Markus Wimmer
URA Update
UE
RNC
[RLC-TR, CCCH] URA Update
URA Update Confirm [RLC-UM, CCCH/DCCH]
no message (no transmission)
UTRAN Mobility Information
Confirm
UE
RNC
[RLC-TR, CCCH] URA Update
RRC Connection Release [RLC-UM, CCCH/DCCH]
UE
Cell/URA Update
Cell/URA Update
T302
no
confirmation
N302
times
T302: default value = 4000 ms
N302: default value = 3
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37 NOKIA topic: RRC Modes , System Information and Paging/ July 2003 /Markus Wimmer
Cell and URA Update Initiation
Cell updatecauses in priority order:
Uplink data transmission in URA_PCH, CELL_PACH
Paging response in URA_PCH, CELL_PACH
Radio link failure in CELL_DCH (*)
Re-entering service area in CELL_FACH, CELL_PCH
RLC unrecoverable error in all sub-states
Cell reselection in CELL_FACH, CELL_PCH
Periodical cell update in CELL_FACH, CELL_PCH
(*) or when the transmission of the RRC message
UE Capability Information failed.
URA updatecauses in priority order:
(the UE is in the URA_PCH sub-state)
URA reselection
Periodic URA update
When do I have to
perform a cell/
URA update?
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39 NOKIA topic: RRC Modes , System Information and Paging/ July 2003 /Markus Wimmer
Periodic Updates
T305
expired?
Cell Update, Reason:
Periodic Cell Update
T307
expired?
Enter
RRC Idle mode
Yes
No
Cell Reselection
T305
expired?
Yes
URA Update, Reason:
Periodic URA Update
Cell Update, Reason:
Cell Reselection
No
In
service
area
Out of
service area
Start T307
Yes
CELL_FACH, CELL_PCH URA_PCH state:
T305: default value = 30 min
T307: default value = 30 s
T316: default alue 30 s
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41 NOKIA topic: RRC Modes , System Information and Paging/ July 2003 /Markus Wimmer
RRC Protocol States
CELL_FACH state:CELL_PCH, URA_PCH state:
In
service
area
Out of
service area
Cell Reselection
Cell Reselection
Cell Update,
Reason:Re-entering
service area
T317
expired?
Release all radio
resources and enter
RRC IDLE mode
T316
expired?
Yes
Yes
Cell Update,
Reason:
Cell Reselection
Cell Update,
Reason:
Cell Reselection
Old
Cell
New Cell New Cellld Cell
No
No
Stop T316
Stop T317
Start T317 Start T316
T316: default value = 30 s
T317: default value = 180 s
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43 NOKIA topic: RRC Modes , System Information and Paging/ July 2003 /Markus Wimmer
In Sync and Out of Sync on DL DPCCHs/DPDCHs
DPCCH_Ec/Ior
time
Q
in
Q
out
T
off
T
on
UE shuts power off UE shuts power on
(adopted from TS25.101 V3.3.0)
160 ms
At least one TB in the last radio
frame with correct CRC transmittedin sync indication
160 ms
20 last TBs transmitted
with correct CRC transmitted
out of sync indication
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45 NOKIA topic: RRC Modes , System Information and Paging/ July 2003 /Markus Wimmer
Radio Link Failure in the CELL_DCH, Timing
serving cell
non-serving
neighbouring cell
out of sync indicators
N313consecutive
timesN315consecutive
times
Start T313
in sync
indicators
Stop T313
T313 = 0
Start cell re-selection
Cell Update message
cause: Radio Link Failure
& start T314 & T315
Default values:
N313: 20
T313: 3s
N315: 1
T314: 12s
T315: 180s
radio bearer
re-establishment time
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47 NOKIA topic: RRC Modes , System Information and Paging/ July 2003 /Markus Wimmer
Nokia Parameters
Following counters and timers can be set:
RNC: N302; default: 3
RNC: T302; default: 4000 ms
RNC: T305; default: 30 min
RNC: T307; default: 30 s
RNC: T316; default: 30 s
RNC: T318; default: 180 s
RNC: T313; default: 3 s
RNC: N313; default: 20 RNC: N315; default: 1