03 3g rpls2_v2-0 procedures

8/10/2019 03 3G RPLS2_v2-0 Procedures

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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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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



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



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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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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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,


URA_PCH

cell/

value tag

RRC idle mode,


URA_PCH)

(adopted from TS 25.331 V3.12.0)


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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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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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Part III

Paging and RRC Modes


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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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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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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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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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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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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




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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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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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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: N313; default: 20 RNC: N315; default: 1

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