03 3G RPLS2 RU10 RRC Modes System Information Paging Update Procedures

1 © Nokia Siemens Networks 3G RPLS / AA / 10/2008I insert classification level

RRC Modes,System Information, Paging, and Update Procedures

3GRPLS (RN3155) – Module 3

Part I: RRC Modes

Part II: System Information and RRC Modes

Part III: Paging and RRC Modes

Part IV: RRC Connection Mobility Management and RRC Modes


Part IRRC Modes

6 © Nokia Siemens Networks 3G RPLS / AA / 10/2008 Soc Classification level

Release RRCConnection

Release RRCConnection

Establish RRCConnection

URA_PCH

CELL_DCH CELL_FACH

CELL_PCH

Establish RRCConnection

UTRA RRC Connected Mode

Idle Mode

GSMConnected

Mode

GPRS PacketTransfer

Mode

(UE camps on UTRAN cell)

Release RRConnection

Establish RRConnection

GSM-UMTS Handover

UTRA: Inter-RAT Handover

(MS in GPRSPacket Idle Mode)

CellReselection

Initiationof a TBF

Releaseof aTBF

(MS camps on a GERAN cell)

(adopted from TS 25.331 V3.12.0)

RRC Modes Diagram

TBF: Temporary Block Flow


Active Setcell

Active Setcell

• DCCH and – if configured – DTCH• Dedicate physical channel in use• UE location known on Active Set AS

cell level• UE responsible for measurement

reporting• UE performs Handover (Soft or Hard)• RRC messages on DCCH

CELL_DCH State

Cell_DCH substate required

for data transfer via HSDPA (HS-DSCH)

and HSUPA (E-DCH)!!

(Changing in 3GPP Rel. 7 with „enhanced Cell_FACH“)


servingcell

• DCCH and – if configured – DTCH• FACH used for higher layer data DL

transfer, • UE monitors FACH permanently• UL 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 &

DCCH• from Rel. 7 on: HSDPA resources can be

used in Cell_FACH; allowing fast & smooth transition from Cell_FACH to Cell_DCH

CELL_FACH State


URA – UTRAN Registration Area

URA 1

URA 2URA 3

RNCsupply

area

• one or several cells• independent from LA /RA• 1 cell can belong to several

URA (NSN*: up to 8)

• no DCCH and DTCH• UL transmission UE moves to CELL_FACH• DL transmission: UE must be paged; UE turn to

CELL_FACH• RRC messages on BCCH & PCCH• in CELL_PCH

- UE location known on cell level- UE performs cell re-selection and cell updates

• In URA_PCH- UE location known on URA level- UE performs URA re-selection and URA updates

CELL_PCH and URA_PCH State

*URAIdList: a maximum of 8 URA identities can be defined per cell.


Both CELL_FACH and CELL_DCH possible

Real time &non-real time bearers

allocated

RRC connection(no bearers allocated)First RT bearer

setup

Last RT bearerreleased

Real time bearer(s)allocated

Non-real timebearer(s) allocated

Last NRTbearer released

Last NRT bearerreleased

Last RT bearerreleased

First NRT bearersetup

NRTbearersetup

RT bearersetup

RT or NRTbearer setup

RT bearer setupNRT bearer

setup

RRC connectionestablished

RRC connectionreleased

Only CELL_DCH allocation possible

States of Bearer Allocation


• 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.

NSN Parameters for the UTRAN Registration Area (URA)


Part IISystem Information and RRC Modes


Node B

UTRANSystem Information ( )

UE RNC

NBAP: BCCH Information

MIBvalue tag M

SIB 1value tag 1

SIB 2value tag 2

SIB 3value tag 3

SIB 18value tag 18

position on P-CCPCH: SFN mod 8* = 0TTI: 20 msvalue tag M: range 1..8

SBvalue tag N

System InformationTS 25.331: RRC

10.2.48: SYSTEM INFORMATION

TS 25.331: RRC10.2.48: SYSTEM INFORMATION

TS 25.433: NBAP8.2.16 System Information Update

TS 25.433: NBAP8.2.16 System Information Update

*every 8th radio frame; value tag unchanged corresponding SIB not modified no need to readSIB 7: w/o value tag; changing with each occurrence

MIB: Master Information Block

SIB: System Information Block

SFN: System Frame Number


SIB broadcasted information read scope/modification

MIB • PLMN types & identities#

• SIB Scheduling information• SIB references

RRC idle mode,CELL_FACH, CELL_PCH,

URA_PCH

cell/value tag

valid


URA_PCH

SIB 1 • NAS information• UE timers & counters


URA_PCH

PLMN/value tag

RRC idle mode,CELL_DCH, CELL_FACH,

CELL_PCH, URA_PCH

SIB 2 • URA identity list URA_PCH cell/value tag

URA_PCH

SIB 4* • Cell selection & re-selection parameters for UEs in the connected mode

CELL_FACH, CELL_PCH, URA_PCH

cell/value tag


SIB 3* • Cell selection and re-selection parameters°

RRC idle mode,(CELL_FACH, CELL_PCH,

URA_PCH)

cell/value tag


URA_PCH)

SIB 5* • Parameters for common physical channel configuration

RRC idle mode,(CELL_FACH,

CELL_PCH, URA_PCH)

cell/value tag

RRC idle mode,(CELL_FACH,

CELL_PCH, URA_PCH)

System InformationTS 25.331: RRC

System Information Blocks10.2.48.8.1 – 21: MIB & SIB 1-18

* Read SIB 3 / 5 in Connected Mode if SIB4 / 6 (Connected Mode) not available

# GSM-MAP/ANSI41; MCC+MNC; ° + Cell Access Restrictions

e.g. T305: Periodic Cell/URA UpdateT301, 302, 304, 307-317

e.g. CPICH Ec/N0 or CPICH RSCP; Sintrasearch, Sintersearch, Ssearch,RAT, Qqualmin, Qrxlevmin,..


SIB broadcasted information read scope/modification

SIB 7 Fast changing parameters: • UL interference level• Dynamic persistence level


URA_PCH

cell/ max(32, 8 * Expir-‘ation Time Factor)

valid


URA_PCH

SIB 11 Measurement control information*


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/value tag

CELL_DCH, CELL_FACH, CELL_PCH, URA_PCH

SIB 16 • RB, TrCH, and PhyCH parameters for a GSM/GPRS-UMTS HO


URA_PCH

cell/value tag


URA_PCH)

(adopted from TS 25.331 RRC)

System Information

* e.g. FMCx & HOPx par.; Use of HCS; Ec/N0 orRSCP; Intra-, Inter-Frequency, Inter-RAT meas. info; Traffic volume meas. Info (e.g. RLC buffer payload)

Examples of other SIB’s:SIB 13: ANSI-41 system informationSIB 14: Only for 3.84 Mcps TDDSIB 15: useful for UE-based or UE-assisted positioning methods SIB 17: only for TDD SIB 18: contains PLMN identities of neighbouring cells to be considered in idle mode as well as in connected mode.


Node B

UTRANPaging 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 modificationtime

SFN: 0..4088step size: 8

1..8

OP

Modification of SIBs using a Value Tag


• 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 NSN parameters exist for the remaining SIBs.

• WCEL: SIB7factor•This 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.

NSN Parameters for System Information

*SIB_REP is the Repetition Period of the System information block. Different System Information

can be scheduled more or less often here we refer to the Repetition period of SIB 7, which is not

configurable


Part IIIPaging and RRC Modes


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 the CELL_FACH or

CELL_DCH state

• MTC• system information changes• enforced cell update

• paging cause from higher layers

Paging


Part IVRRC Connection Mobility Managementand RRC Modes

Cell Update URA Update Out of Coverage In-Sync, Out-Sync & Radio Link Failure


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]

Cell Update


UE RNC

[RLC-TM, CCCH] URA Update

URA Update Confirm [RLC-UM, CCCH/DCCH] • no message (no transmission)

• UTRAN Mobility Information Confirm

UE RNC

[RLC-TM, CCCH] URA Update

RRC Connection Release [RLC-UM, CCCH/DCCH]

UECell/URA Update

Cell/URA UpdateT302

noconfirmation

N302times

T302: default value = 2000 msN302: default value = 7

URA Update


Cell update causes in priority order:• Uplink data transmission in URA_PCH, CELL_PCH• Paging response in URA_PCH, CELL_PCH• 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 update causes 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?

Cell and URA Update Initiation


Out of coverage – RRC connected

URA_PCH

CELL_DCH

CELL_FACH

CELL_PCH

IDLE

In sync

Out of sync

In service area

Out of Service

area


CELL_FACH state: CELL_PCH, URA_PCH

In service

area

Out of service

areaCell Reselection

Cell Reselection

Cell Update,Reason:

Re-enteringservice area

T316expired?

Yes

Cell Update, Reason:

Cell Reselection

No

Stop T316Stop T317

Start T317

Start T316

RRC Protocol States

Start T317

Stop T316Stop T317

OldCell

NewCell

Old Cell

Note: T305 isrunning

SIB 1:T316: 0, 10, 15, 20, 30, 40, 50 s & infinityT317: 0, 10, 30, 60, 180, 600, 1200, 1800 s; if expired: UE IDLE mode


T305expired?

Cell Update, Reason:Periodic Cell Update

T307 expired?

EnterRRC Idle mode

Yes

No

Cell Reselection

T305expired?

Yes

URA Update, Reason:Periodic URA Update

Cell Update, Reason:Cell Reselection

No

In service

area

Out of service

area

Start T307Yes

CELL_FACH, CELL_PCH & URA_PCH state:

Periodic Updates & out of coverageT305: no update, 5, 10, 30, 60, 120 , 360, 720 min & infinity T307: 5, 10, 15, 20, 30, 40, 50 s

SIB 1:


Physical channel establishment criteria

in sync indicators

N312 consecutivetimes

Start T312

Stop T312

T312 = 0

• Physical channel is considered established

• The timer T312 is stopped and reset

• Physical channel failure

• UE initiates synchronisation procedure

N312: max. # of "in sync" indications during establishment phase1, 2, 4, 10, 20, 50, 100, 200, 400, 600, 800, 1000; default: 4

T312: timer supervising successful PHY Channel establishment1..15 s; 1 s; default: 6 s

SIB 1:


DL synchronisation status

Phase 2: • This phase starts 160 ms after the dedicated physical channel (was considered to be)

established.• The UE performs measurements and estimates the DPCCH quality over the previous 160

ms period. • An out of sync is detected, if EITHER

• The UE estimates the DPCCH quality over the previous 160 ms period to be worse than a threshold Qout.

OR• The 20 most recently received transport blocks with a non-zero length CRC attached, as

observed on all TrCHs using non-zero length CRC, have been received with incorrect CRC.

• An in sync is reported to the higher layers, when both• The UE estimates the DPCCH quality over the previous 160 ms period to be better than a

threshold Qin.AND• At least one transport block with a non-zero length CRC attached, as observed on all TrCHs

using non-zero length CRC, is received in a TTI ending in the current frame with correct CRC.


DPCCH_Ec/Ior

time

Qin

Qout

Toff Ton

UE shuts power off UE shuts power on(adopted from TS25.101 V5)

160 ms

At least one TB in the last radioframe received with correct CRC in sync indication

160 ms

20 last TBs receivedwith incorrect CRC

out of sync indication

In Sync and Out of Sync on DL DPCCHs/DPDCHs

AND

OR


serving cell

non-serving neighbouring cell

out of sync indicators



Start T313

in syncindicators

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 bearerre-establishment time

Radio Link Failure in the CELL_DCH, Timing


Summary of timers for UETimer Start Stop At expiry

T300 Transmission of RRC CONNECTION REQUEST Reception of RRC CONNECTION SETUP Retransmit RRC CONNECTION REQUEST if V300 =< N300, else go to Idle mode

T302 Transmission of CELL UPDATE/URA UPDATE Reception of CELL UPDATE CONFIRM/URA UPDATE CONFIRM

Retransmit CELL UPDATE/URA UPDATE if V302 =< N302, else, go to Idle mode

T304 Transmission of UE CAPABILITY INFORMATION Reception of UE CAPABILITY INFORMATION CONFIRM

Retransmit UE CAPABILITY INFORMATION if V304 =< N304, else initiate a cell update procedure

T305 Entering CELL_FACH or URA_PCH or CELL_PCH state. Reception of CELL UDPATE CONFIRM/URA UPDATE CONFIRM.

Entering another state. Transmit CELL UPDATE if T307 is not activated and the UE detects "in service area". Otherwise, if T307 is not active, start T307.

T307 When the timer T305 has expired and the UE detects "out of service area".

When the UE detects "in service area". Transit to idle mode

T308 Transmission of RRC CONNECTION RELEASE COMPLETE

Not stopped Transmit RRC CONNECTION RELEASE COMPLETE if V308 <=N308, else go to idle mode.

T312 When the UE starts to establish dedicated CH When the UE detects N312 "in sync" indication from L1.

The criteria for physical channel establishment failure is fulfilled

T313 When the UE detects consecutive N313 "out of sync" indication from L1.

When the UE detects consecutive N315 "in sync" indication from L1.

The criteria for Radio Link failure is fulfilled.

T314 When the criteria for radio link failure are fulfilled.The timer is started if radio bearer(s) that are

associated with T314 exist of if only RRC connection exists.

When the Cell Update procedure has been completed. See subclause 8.3.1.13.

T315 When the criteria for radio link failure are fulfilled.The timer is started only if radio bearer(s) that are

associated with T315 exist.

When the Cell Update procedure has been completed. See subclause 8.3.1.14.

T316 When the UE detects "out of service area" in URA_PCH or CELL_PCH state

When the UE detects "in service area". Initiate cell update procedure if in service area is detected. Otherwise start timer T317, transit to CELL_FACH state and initiate cell update procedure when the UE detects "in service area".

T317 When the T316 expires or when in CELL_FACH state, the UE detects "out of service area".

When the UE detects "in service area". T317 never expires.



Summary of counters for UE

Counter Reset Incremented When reaching max value

V300 When initiating the procedure RRC connection establishment

Upon expiry of T300.

When V300 > N300, the UE enters idle mode.

V302 When initiating the procedure Cell update or URA update

Upon expiry of T302

When V302 > N302 the UE enters idle mode.

V304 When sending the first UE CAPABILITY INFORMATION message.

Upon expiry of T304

When V304 > N304 the UE initiates the Cell update procedure

V308 When sending the first RRC CONNECTION RELEASE COMPLETE message in a RRC connection release procedure.

Upon expiry of T308

When V308 > N308 the UE stops re-transmitting the RRC CONNECTION RELEASE COMPLETE message.



Following counters and timers can be set:

• RNC: N302; default: 7

• RNC: T302; default: 2000 ms

• RNC: T305; default: 30 min

• RNC: T307; default: 30 s






NSN Parameters

03 3G RPLS2 RU10 RRC Modes System Information Paging Update Procedures

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