Handover

RNC

UE(4) Traffic Volume Measurements

(1) Intra Frequency Measurements

(2) Inter Frequency Measurements

(3) Inter RAT Measurements

(6) UE Internal Measurements

(5) Quality Measurements

(7) UE Positioning Measurements

CELL_DCH

Measurement Types and Configuration

Fig

. 27

Mea

sure

men

t typ

es a

nd c

onfig

urat

ion

optio

ns. (

TM

3201

Rad

io R

esoo

l Pro

toco

l RR

C, 5

7)

RRC

(7) UE Positioning Measurements

Activated measurements

measurement objects,measurement quantity,filtering coefficient,active events,triggering criteria

Measurement Control or SIB 11|12

( setup/modify: measurement id,measurement configuration,release: measurement id)

Fig

. 27

Mea

sure

men

t typ

es a

nd c

onfig

urat

ion

optio

ns. (

TM

3201

Rad

io R

esoo

l Pro

toco

l RR

C, 5

7)

Measurements and Reporting Trigger

RNC

UE

WCDMA

frequency measurements,quality measurements,UE internal measurments,UE positioning measurments

RLC/MAC traffic volume measurements

periodical measurements

Fig

. 28

Eve

nt d

riven

rep

ortin

g. (

TM

3201

Rad

io R

esou

rce

Con

trol

Pro

toco

l RR

C, 5

9)

RRC

periodical measurements

Measurments filtering

reportingcriterion for activeevent fullfilled ?

Yes Measurement Report(filtered measurements, triggered event)

Fig

. 28

Eve

nt d

riven

rep

ortin

g. (

TM

3201

Rad

io R

esou

rce

Con

trol

Pro

toco

l RR

C, 5

9)

Measurement Types and Measurement Quantities

1) Intra Frequency Measurements 1) DL Ec/No2) DL Pathloss3) DL RSCP (after despreading)

2) Inter Frequency Measurements 1) DL Ec/No2) DL Pathloss3) DL RSCP (after despreading)

3) Inter RAT Measurements 1) GSM carrier RSSI

4) Traffic Volume Measurements 1) Buffer occupancy4) Traffic Volume Measurements 1) Buffer occupancy2) Average buffer occupancy3) Variance of buffer occupancy

5) Quality Measurements 1) DL block error rate (BLER) per TrCH

6) UE Internal Measurements 1) UE Tx power2) UE received signal power (RSSI)3) UE Rx-Tx time difference

7) UE Positioning Measurements 1) SFN-SFN observed time difference2) Rx-Tx time difference (optional)3) GPS timing of cell frames (optional)

Fig. 29 Measurement types and relevant measurement quantities. (TM3201 Radio Resource Control Protocol RRC, 61)

Intra Frequency Reporting Events - Overview

1A

1B

1C

A P-CPICH enters the reporting range.

A P-CPICH leaves the reporting range.

A non-active P-CPICH becomes better

add new radio link

drop weak radio link

replace old RL

Event ID Event Description Notes

1C

1D

1E

1F

A non-active P-CPICH becomes betterthan an active P-CPICH.

Change of the best cell.

A P-CPICH becomes better than anabsolute threshold.

A P-CPICH becomes worse than anabsolute threshold.

replace old RLby new RL

Fig. 30 Overview about intra frequency reporting events. (TM3201 Radio Resource Control Protocol RRC, 63)

Intra Frequency Reporting Event 1A

AS-cell 1

RSCP orEc/No W=0

)2/(Log10)1(Log10Log 111

aaBest

N

iiNewNew HRMWMWCIOM

A

−−⋅⋅−+

⋅⋅≥+ ∑

=

1A trigger(not for pathloss)

)2/(Log10)1(Log10Log 111

aaBest

N

iiNewNew HRMWMWCIOM

A

+−⋅⋅−+

⋅⋅<+ ∑

=

leaving trigger(not for pathloss)

Fig

. 31

Trig

ger

and

leav

ing

trig

ger

crite

ria fo

r re

port

ing

even

t 1A

. (T

M32

01 R

adio

Res

ourc

e C

ontr

ol P

roto

col R

RC

, 65)

AS-cell 2 R1a

H1a/2

time

CIO3

cell 3

trigger 1A reportadd cell to Triggered_1A_Event

trigger 1A reportadd cell to Triggered_1A_Event

remove cell fromTriggered_1A_Event

time to trigger time to trigger

Fig

. 31

Trig

ger

and

leav

ing

trig

ger

crite

ria fo

r re

port

ing

even

t 1A

. (T

M32

01 R

adio

Res

ourc

e C

ontr

ol P

roto

col R

RC

, 65)

Intra Frequency Reporting Event 1B

)2/(Log10)1(Log10Log 111

bbBest

N

iiOldOld HRMWMWCIOM

A

+−⋅⋅−+

⋅⋅≤+ ∑

=

1B trigger(not for pathloss)

)2/(Log10)1(Log10Log 111

bbBest

N

iiOldOld HRMWMWCIOM

A

−−⋅⋅−+

⋅⋅>+ ∑

=

leaving trigger(not for pathloss)

AS-cell 1

RSCP orEc/No W=0

AS-cell 3

Fig

. 32

Trig

ger

and

leav

ing

trig

ger

crite

ria fo

r re

port

ing

even

t 1B

. (T

M32

01 R

adio

Res

ourc

e C

ontr

ol P

roto

col R

RC

, 65)

AS-cell 2R1b

H1b/2

time

CIO3

AS-cell 3

trigger 1B event reportadd cell to Triggered_1B_Event

trigger 1B reportadd cell to Triggered_1B_Event

remove cell fromTriggered_1B_Event

time to trigger time to trigger

Fig

. 32

Trig

ger

and

leav

ing

trig

ger

crite

ria fo

r re

port

ing

even

t 1B

. (T

M32

01 R

adio

Res

ourc

e C

ontr

ol P

roto

col R

RC

, 65)

Intra Frequency Reporting Event 1C

2/Log10Log10 1cInASInASNewNew HCIOMCIOM ++⋅≥+⋅1C trigger(not for pathloss)

2/Log10Log10 1cInASInASNewNew HCIOMCIOM −+⋅<+⋅leaving trigger(not for pathloss)

InAS is cell in active set with lowest measurement.

AS-cell 1

RSCP orEc/No

CIO

Fig

. 33

Trig

ger

and

leav

ing

trig

ger

crite

ria fo

r re

port

ing

even

t 1C

. (T

M32

01 R

adio

Res

ourc

e C

ontr

ol P

roto

col R

RC

, 67)

AS-cell 2

H1c/2

time

CIO2

non AS cell 3

trigger 1C event reportadd cell to Triggered_1C_Event

trigger 1C reportadd cell to Triggered_1C_Event

remove cell fromTriggered_1C_Event

CIO1

H1c/2

CIO3

time to triggertime to trigger

Fig

. 33

Trig

ger

and

leav

ing

trig

ger

crite

ria fo

r re

port

ing

even

t 1C

. (T

M32

01 R

adio

Res

ourc

e C

ontr

ol P

roto

col R

RC

, 67)

UERNCNode B

cell 1

cell 2

cell 3

active setcell 1 Measurement Control

RRC(setup: measurement ID, intra-frequency cell info list {cell 2, cell 3}, intra-freq. measurement quantity =

CPICH Ec/No intra-freq. measurement reporting event list {1A, 1B, 1C + parameters} )

meas.running

RRC

event 1Afor cell 2 Measurement Report

(measured result {cell2, observed SFN time difference, scrambling code, CPICH-Ec/No}, event results {1A – scrambling code of associated cell 2} )

1) soft HOdecision

2) soft HOprep.NBAP

RL Addition Requestprep.NBAP

( Node B Communic. Context ID, RL-ID, Cell ID=2, DL code information, DL power

information) )

NBAPRL Addition Response

( RNC Communic. Context ID, RL-ID, received total wideband power )

softer HO activated

Active Set UpdateRRC

( activation time = now, radio link addition info {cell ID = 2, DL minimum spreading factor,code number} )

Active Set Update Complete( )

Measurement ControlRRC

(modify: measurement ID, add intra frequency cell (neighbors of cell 2), ... )

active setcell 1,2

3) soft HOexec.

RRC

Fig. 34 Soft handover scenario 1(3). (TM3201 Radio Resource Control Protocol RRC, 69)

UERNCNode B

cell 1

cell 2

cell 3

RRC

event 1Ccell 3 better than cell 1

Measurement Report

(measured result {cell3,...} {cell 1,...}, event results {1C – scrambling code of cell 3} )soft HOdecision(add 3, delete 1)NBAP

RL Addition Request

( Node B Communic. Context ID, RL-ID, Cell ID=3, DL info... )

NBAPRL Addition Response

( RNC Communic. Context ID, RL-ID,

active setcell 1,2

Fig

. 35

Sof

t han

dove

r sc

enar

io 2

(3).

(T

M32

01 R

adio

Res

ourc

e C

ontr

ol P

roto

col R

RC

, 70)

received total wideband power )

Active Set UpdateRRC

( activation time = now, radio link addition info {cell ID = 3, DL minimum spreading factor,code number} ,radio link deletion info {RL-ID of cell 1} )

Active Set Update Complete

( )


(modify: measurement ID, add intra frequency cell (neighbors of cell 3), delete neighbor cell listfor cell 1,... )

active setcell 2,3

NBAP( Node B Communic. Context ID, RL-ID,

Cell ID=1, DL info... )

NBAPRL Deletion Response

RL Deletion Request

RRC

( RNC Communic. Context ID, RL-ID)

Fig

. 35

Sof

t han

dove

r sc

enar

io 2

(3).

(T

M32

01 R

adio

Res

ourc

e C

ontr

ol P

roto

col R

RC

, 70)

UE RNCNode Bcell 1

cell 2

cell 3

RRC

event 1Bcell 2 leaves reporting range

Measurement Report

(measured result {cell3,...} {cell 2,...}, event results {1B – scrambling code of cell 2} )soft HOdecision(add 3, delete 1)Active Set Update

( activation time = now, radio link deletion info {RL-ID of cell 2} )

Active Set Update Complete

( )

active setcell 3,2

RRC( )


(modify: measurement ID, add intra frequency cell (neighbors of cell 2), delete neighbor cell listfor cell 2,... )

active setcell 3

NBAP( Node B Communic. Context ID, RL-ID,

Cell ID=2, DL info... )


RL Deletion Request

( RNC Communic. Context ID, RL-ID)

Fig. 36 Soft handover scenario 3(3). (TM3201 Radio Resource Control Protocol RRC, 71)

Intra Frequency Reporting Event 1D

2/Log10Log10 1dBestBestNotBestNotBest HCIOMCIOM ++⋅≥+⋅1D trigger(not for pathloss)

best cell 1

RSCP orEc/No

H1d/2

cell 2

time

CIO1

trigger 1D reportbest cell = cell 2

H1d/2

CIO2 time to trigger

Fig. 41 Intra-frequency reporting event 1D trigger. (TM3201 Radio Resource Control Protocol RRC, 77)

UERNC

SourceNode B

cell 1 cell 2

active setcell 1


(setup: measurement ID, intra-frequency cell info list {cell 2}, intra-freq. measurement quantity = CPICH Ec/No intra-freq. measurement reporting event list {1D + parameters} )

RRC

event 1Dcell 2 stronger than cell 1

Measurement Report

(measured result {cell2, observed SFN time difference, scrambling code, CPICH-Ec/No}, event results {1D – scrambling code of associated cell 2} )

1) hardHOdecision

2) hard HOprep.

NBAPRL Setup Request

( RNC Communic. Context ID2, RL-ID,

TargetNode B

prep.( RNC Communic. Context ID2, RL-ID, Cell ID=2, DL code information, DL power

Information, UL scrambling code info )

NBAPRL Setup Response

( RNC Communic. Context ID2,Node B Communic. Context ID2, RL-ID,

received total wideband power,Binding ID2 )

3) soft HOexec.

ALCAPEstablishment Request

( Binding ID2, Path ID2, CID2, ... )

ALCAPEstablishment Confirm

Fig. 42 Hard handover scenario 1(2). (TM3201 Radio Resource Control Protocol RRC, 79)

UERNC

SourceNode B

cell 1 cell 2

active setcell 2

Radio Bearer ReconfigurationRRC

( new UL/DL codes, new transport format sets and combination sets )

RRCRadio Bearer Reconfiguration Complete

( ... )

NBAPRL Restore Indication

( RNC Communic. Context ID2 )

TargetNode B

DPCH synchronisation

Fig

. 43

Har

d ha

ndov

er s

cena

rio 2

(2).

(T

M32

01 R

adio

Res

ourc

e C

ontr

ol P

roto

col R

RC

, 79)

NBAPRL Deletion Request

( Node B Communic. Context ID1 )

ALCAPRelease Request

( .. [for path 1] )ALCAP

Release Confirm

NBAPRL Failure Indication




( .. [for path 1] )


( neighbor cell list for cell 2, measurement reporting events )

Fig

. 43

Har

d ha

ndov

er s

cena

rio 2

(2).

(T

M32

01 R

adio

Res

ourc

e C

ontr

ol P

roto

col R

RC

, 79)

Intra Frequency Reporting Event 1E

2/Log10 11 eeNewNew HTCIOM +≥+⋅1E trigger(not for pathloss)

2/Log10 11 ceNewNew HTCIOM −<+⋅leaving trigger(not for pathloss)

RSCP orEc/No

CIO

cell 1

timetrigger 1E reportAdd cell 1 to Triggered_1E_Event

H1e/2

CIO1

time to trigger

T1e

H1e/2

remove cell 1 fromTriggered_1E_Event

time to trigger

trigger 1E reportAdd cell 1 to Triggered_1E_Event

Fig. 44 Trigger and leaving trigger criteria for intra-frequency reporting event 1E. (TM3201 Radio Resource Control Protocol RRC, 81)

Intra Frequency Reporting Event 1F

2/Log10 11 ffOldOld HTCIOM −≤+⋅1F trigger(not for pathloss)

2/Log10 11 ffOldOld HTCIOM +<+⋅leaving trigger(not for pathloss)

cell 1

RSCP orEc/No

CIO1

timetrigger 1F reportadd cell 1 to Triggered_1F_Event

H1f/2

time to trigger

T1f

H1f/2

remove cell 1 fromTriggered_1F_Event

time to trigger

trigger 1F reportadd cell 1 to Triggered_1F_Event

Fig. 45 Trigger and leaving trigger criteria for intra-frequency reporting event 1F. (TM3201 Radio Resource Control Protocol RRC, 81)

Inter Frequency Reporting Events - Overview

2A

2B

2C

Change of best frequency.

Estimated quality of current used frequency is below a certain threshold and estimated quality of a non-used frequency is above a certain threshold.

Estimated quality of a non-used frequency is

Handover to new frequency


2C

2D

2E

2F

Estimated quality of a non-used frequency isabove a certain threshold.

Estimated quality of currently used frequency isbelow a certain threshold.

The estimated quality of a non-used frequencyis below a certain threshold.

The estimated quality of currently frequency isabove a certain threshold.

Trigger inter-frequencymeasurements.

Stop inter-frequencymeasurements on thisfrequency.

Stop all inter-frequencymeasurements.

Fig. 46 Inter-frequency reporting event –overview. (TM3201 Radio Resource Control Protocol RRC, 83)

Inter RAT Reporting Events - Overview

3A

3B

3C

Estimated quality of other system is belowa certain threshold.

Estimated quality of current used UTRAN frequency is below a certain threshold and estimated quality of other system frequency is above a certain threshold.

The estimated quality of other system is

Handover to new system.


Stop inter-RATmeasurements.

3C

3D

above a certain threshold.

Change of best cell in other system.

Fig. 47 Inter-RAT reporting events – overview. (TM3201 Radio Resource Control Protocol RRC, 85)

Traffic Volume Reporting Events - Overview

4A

4B TrCH traffic volume becomes smaller than anabsolute threshold.


SF switch to 2SF orTrCH switch DCH to FACH

TrCH traffic volume becomes bigger than anabsolute threshold.

SF switch to SF/2 orTrCH switch FACH to DCH

Fig. 48 Traffic volume reporting events. (TM3201 Radio Resource Control Protocol RRC, 87)

Traffic Volume Reporting Event 4A and 4BTraffic Volume(RLC Buffer Occupancy)Transp. Channel x

BufferOccupancy

T4A

T

measurement report

4A trigger start/stop

4B trigger start/stop

Fig

. 49

Tra

ffic

volu

me

repo

rtin

g ev

ents

4A

and

4B

. (T

M32

01 R

adio

Res

ourc

e C

ontr

ol P

roto

col R

RC

, 89)

timetime

to trigger 4A

T4B

pendingtimeafter

trigger 4A4A 4A 4A 4B 4B4B

time to

trigger 4B

pendingtimeafter

trigger 4B

4A 4A 4A 4A

4B 4B4B

Fig

. 49

Tra

ffic

volu

me

repo

rtin

g ev

ents

4A

and

4B

. (T

M32

01 R

adio

Res

ourc

e C

ontr

ol P

roto

col R

RC

, 89)

UERNCNode B

cell 1

State:CELL_FACH Measurement Control

RRC(setup: measurement ID, traffic volume measurement for TrCH x {4A, time to trigger, pending time},

{4B, time to trigger, pending time} )

RRC

Event 4Afor TrCH x Measurement Report

( event result {4A for TrCH x, Buffer Occupancy, Variance} )

TrCHSwitchDecision

NBAPRL Setup Request

( RNC Communic.Context ID, RL-ID,DL Code Info, UL Code Info,... )

NBAPRL Setup Response

Fig

. 50

Tra

nspo

rt c

hann

el s

witc

h. (

TM

3201

Rad

io R

esou

rce

Con

trol

Pro

toco

l RR

C, 9

1)

NBAP( RNC Communic. Context ID, Binding IDNode B Communic. Context ID, RL-ID )

Radio Bearer ReconfigurationRRC

( DPCH info, new transport format sets and combination sets, ...)

Radio Bearer Reconfiguration Complete( )


(new measurements for CELL_DCH state )

State:CELL_DCH

RRC

ALCAPEstablishment Request

( Binding ID, Path ID, CID, ... )

ALCAPEstablishment Confirm

Fig

. 50

Tra

nspo

rt c

hann

el s

witc

h. (

TM

3201

Rad

io R

esou

rce

Con

trol

Pro

toco

l RR

C, 9

1)

Quality Reporting Events - Overview

5A


A predefined number of bad CRCs is exceededduring a predefined sliding time window.

Increase max UL Tx power orabort service or reduce max bit rate

Fig. 51 Quality reporting events – overview. (TM3201 Radio Resource Control Protocol RRC, 93)

Quality Reporting Event 5ACRC ok

CRC bad

Example Configuration:Pending After Trigger = 5 CRCBad CRC = 2 CRCTotal CRC = 4 CRC

Total CRC

Total CRC Total CRC Total CRC

Total CRC

DL Transport

Fig

. 52

Qua

lity

repo

rtin

g ev

ent 5

A. (

TM

3201

Rad

io R

esou

rce

Con

trol

Pro

toco

l RR

C, 9

3)

5AReport

Pending Time After Trigger

5AReport

Pending Time After Trigger

TransportBlocks

Fig

. 52

Qua

lity

repo

rtin

g ev

ent 5

A. (

TM

3201

Rad

io R

esou

rce

Con

trol

Pro

toco

l RR

C, 9

3)

UE Internal Reporting Events - Overview

6A

6B

6C

UE Tx power becomes bigger than absolutethreshold.

UE Tx power reaches its minimum value.


UE Tx power becomes less than absolute threshold.

6D

6E

6F

UE Tx power reaches its maximum value.

UE RSSI reaches the UE‘s receiver dynamic range.

The Rx-Tx time difference for a radio link in the activeset becomes larger than an absolute threshold.

6G The Rx-Tx time difference for a radio link in the activeset becomes smaller than an absolute threshold.

Fig. 53 UE internal reporting events – overview. (TM3201 Radio Resource Control Protocol RRC, 95)

UE Positioning Reporting Events - Overview

7A

7B

7C

UE position changes more than an absolute threshold.

GPS time and SFN time have drifted apart more than anabsolute threshold.


SFN-SFN measurement changes more than an absolute threshold.

Fig. 54 UE positioning reporting events – overview. (TM3201 Radio Resource Control Protocol RRC, 95)

Handover

Technology

Transcript of Handover