08a UTRAN Procedures Ws11

8/12/2019 08a UTRAN Procedures Ws11

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UMTS Networks 1Oliver Waldhorst, Jens Mueckenheim Oct-11

UTRAN Procedures

Elementary procedures

Paging RRC connection setup Transaction reasoning Authentication and security control Transaction setup with RAB allocation

Transaction clearing and RAB release RRC connection releaseRRM procedures Radio link addition and deletion Intersystem handover from UMTS to GSM (CS/PS) UE state transitions/ bearer reconfiguration

MM procedures -> see MM slidesCM procedures -> see CM slides

References: Kaaranen ch. 10 (simple cases discussed here)

3GPP TR 25.931 (more complicated cases)


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Basic Model of UMTS Network Transactions

Paging

RRC Connection Establishment

Transaction Reasoning(Signaling conn. establishment)

Authentication andSecurity

Transaction Setup andRAB Allocation

Transaction

(user or control plane)

Transaction Release andRAB Release

RRC Connection Release

UE indicates the CNthe requested service

A transaction comprises all the elementaryprocedures required to enable

the transport of user data (PS or CSmode) or

the exchange of higher-layer signalingmessages (e.g. MM or CM)

Allocation of bearers to supportrequired UMTS bearer service

Transfer of data

Release of all bearers to supportUMTS bearer service


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UE RRC Connected States

Cell_DCH

Dedicated Traffic and Control carried over DCH

Cell_FACH Dedicated Traffic and Control carried over RACH/ FACH

URA_PCH

No air interface resources required, dormant RB

UE receives paging on UTRAN Routing Area (URA) basis rather than

standard routing area (RA); URA usually in the order of 10 cells

C e l l F A C H

C e l l D C HU R A P C H

N o d a t a

N o d a t a

D a t a ac t i v i ty

D a t a

ac t iv i t y

L o w

traf f ic

H igh t r a f f ic

o r C S c a l l

D y n a m i c R B

r e c o n f i g u r e

C e l l F A C H

C e l l D C HU R A P C H

N o d a t a

N o d a t a

D a t a ac t i v i ty

D a t a

ac t iv i t y

L o w

traf f ic

H igh t r a f f ic

o r C S c a l l

D y n a m i c R B

r e c o n f i g u r e

optional


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Paging

Paging type 1:

UE idle mode (no RRC connection) RRC connected modes cell_PCH or URA_PCH

Example: paging for a UE in idle mode

U E N od e B

1 .1

N od e B

2 .1

R N C

1

R N C

2

C N

R A N A PR A N A P

1 . P a g i n g

2 . P C C H : P a g i n g T y p e 1

R A N A P R A N A P1 . P a g i n g

3 . P C C H: P a g i n g T y p e 1

(Requesting CN domain,

IMSI, ...)

Paging





Transaction(user or control plane)




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Paging

Paging type 2:

UE is in RRC connected mode cell_DCH or cell_FACH

Paging request from another CN domain

Example: paging for a UE in RRC Connected Mode(CELL_DCH or CELL_FACH state)

2 cases:

UTRAN coordinates the paging request with the existing RRC connection (given example)

UE coordinates the paging request with the existing RRC connection

U E S e r v i n g

R N C

C N

R R CR R C

2 . D C C H: P a g i n g T y p e 2

R A N A P R A N A P1 . Pa g i n g

Paging









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RRC Connection Setup

Establishment of a RRC connection in cell_DCH mode

Paging








U E N o d e B R N C C N

U E _ I d l e

C E L L _ D C H

In i t i a l R an d o m Acces s

C C C H ( T M ) / R A C H : R R C C o n n e ct io n R e q u e s t

R L S e t u p R e q u e s t

R L S e t u p R e s p o n s e

A L C A P I u b T r a n s p o r t b e a r e r S e tu p

U L / D L S y n c h r o n i s a ti o n

C C C H ( U M ) / F A C H : R R C C o n n e c t io n S e t up

D C C H ( A M ) / D C H : R R C C o n n e c t i on S e tu p C o m p l e t e A d d r . : b y D C H

D C C H e s t ab l is h e d

UE cap ab i l i t ie s

k n o w n

Ad d r . : I n i ti a l UE ID

R e q u e s t fo r D C C H

In c l . E s t ab l i sh m en t

c a u s e

E s t ab l i s h m en t

o f U T R A N

D C H r e s o u r c e s

i n c l. C A C

Ad d r . : I n i t ia l UE ID


7/28UMTS Networks 7Oliver Waldhorst, Jens Mueckenheim Oct-11

Initial Random Access

UE addressing

CCCH: UE ID embedded in the RRC message

DTCH/ DCCH: UE ID included in MAC header

U E N o d e B Con t ro l l i ng

R N C

P r e a m b l e

P r e a m b l e

P r e a m b l e

A c q u is iti o n In d ic a ti o n (A IC H )

P R A C H M e s s a g e

R e s o u r c i n g N o d e B

H a r d w a r e

R A C H F P

R A C H M e s s ag e

[ R R C C o n n e c t i o n R e q u e s t ]

C R C C h e c k

R A C H F P

P e r s i s t e n c y

c h e c k b e f o r e



RRC Connection Setup

Reasons for RRC connection setup:

Call setup (mobile-originated and mobile-terminated calls)

Conversational call Streaming call

Interactive call

Background call

Emergency call

Call re-establishment

Exchange of signaling messages (low/high priority)

RRC connection request message contains, e.g.

IMSI, TMSI, IMEI Location area, routing area identity, etc.

Other information: e.g. HSDPA/ E-DCH UE capability, standards release



NAS Signaling Connection Establishment(Transaction Reasoning)

U E S e r vin g

R N C

C N

1 . R R C C o n n e c t io n E s t a b l is h m e n t

R R CR R C

2 . D C C H : In i t i a l Di re c t T r a n s fe r

R A N A P R A N A P

3 . I n i t ia l U E M e s s a g e

Payload contains system network message:

Information about the transaction initiated bythe UE (IMSI, TMSI, location area, kind of

requested transaction)

Paging










Authentication and Security Control

Authentication request/response: mutual authentication of UE and network

Security mode command/complete: CN domain indicates to UTRAN and UE the encryptiondetails (method/algorithms and encryption keys)

Paging










Transition Setup and RAB Establishment(CS Mode)

Paging










Transition Setup and RAB Establishment(PS Mode)

Paging










RAB Establishment

Example: Synchronised establishment of a RAB on DCH

R A B A s s i g n m e n t R e s p o n s e

R a d i o B e a r e r S e t u p C o m p l e te

R a d i o B e a r e r S e t u p

R a d i o L i n k R e c o n f i g u r a ti o n C o m m i t

R ad i o L i n k R eco n f i g u ra t i o n R ead y

R ad i o L i n k R eco n f i g u ra t i o n P rep a re

R A B A s s i g n m e n t

C NS R N CN o d e BU E

A L C A P I u T r a n s p o r t B e a r e r E s ta b l is h m e n t

A L C A P I u b T r a n s p o r t B e a r e r E s ta b l is h m e n t

N o d e B R N C D a t a T r a n sp o r t B e a r e r S y n c

C e l l _ D C H

Act i v a t i o n T i m e ,

TA cti va ti on

C e l l _ D C H /

C e l l _ F A C H W h e n C S C NW h e n C e l l_ F A C H :

R L S e t u p



Transaction Release and RAB Release(CS Mode)

Note: signaling connection and RRC connection remains

Paging










Transaction Release and Iu Release(CS Mode)

Note: signaling connection and RRC connection are released

Paging










Transaction Release and RAB Release(PS Mode)

Note: signaling connection and RRC connection remain

Paging










Transaction Release and Iu Release(PS Mode)

Note: signaling connection and RRC connection are released

Paging










RRC Connection ReleasePaging










RRC Connection Release (involving DRNC)

Example: RRC connection release of a dedicated channel in soft HO modewith DRNC

1 0 . Rad io L in k D ele t io n Resp o n se

8 . Rad io L in k D ele t io n

9 . Rad io L in k D ele t io n Resp o n se


5 . R R C C o n n e c t io n R e l e a s e C o m p l e t e

4 . R R C C o n n e c t io n R e l e a s e

1 1 . Rad io L in k D ele t io n Resp o n se


U E N o de B D ri ft R N S

N o d e B S e r v i n g R N S

Drif tR N C

S er v in gR N C

C N

R R C

R R C R R C

N B A P

N B A P

R N S A P

N B A P N B A P

N B A P

R N S A P

R A N A P

R A N A P

3 . A L C A P I u B e a r e r R e l e a s e

A L C A P I u r B e a r e r

Re lease

1 3 . A L C A P I u b B e a r e r R e l e a s e

1 2 . A L C A P I u b B e a r e r R e l e as e

1 . I u R e l e a se C o m m a n d

2 . I u Re lease Co mp le te

R R C

R A N A P

N B A P

R N S A P

N B A P

N B A P

R N S A P

R A N A P



Soft Handover Radio Link Addition

U E S R N CT a r g e t

N o d e BD R N C

A L C A P I u r b e a re r S e tu p

A c t i v e S e t U p d a t e ( R a d i o L i n k A d d i t io n )

A L C A P I u b D a t a T r a n s p o r t be a r e r S e tu p

R N C D e c i d es t o

a d d a n e w R a d i o

L i n k

T a r g e t N o d e B i s

e a d y

UE s t a r t s

R x o n n e w

a d io l i n k

E . g . n e w

e ig h b o u r c e l l l i s t

R a d i o L i n k R e s t o r e I n d i c a t io nR a d i o L i n k R e s t o r e In d i c a t i o n

A c t i v e S e t U p d a t e C o m p l e t e

M e a s u re m e n t C o n t r o l

s t ar t Rx

s t a rt T x

W h e n R L S e t up

R a d i o L i n k A d d / S e t u p R e q u e s t

R a d i o L i n k A d d / S e t u p R e s p o n s e

R a d i o L i n k A d d / S e t u p R e q u e s t

R a d i o L i n k A d d / S e t u p R e s p o n s e

Unsynchronized addition



Soft Handover Radio Link Deletion

UE SRNCNode B DRNC

Free-up resources of

old NodeB

Active Set Update (Radio Link Deletion)

UE stopsRx on old

radio link

E.g. new

neighbour cell list

Active Set Update Complete

Measurement Control

Radio Link Deletion Request

ALCAP Iur bearer ReleaseALCAP Iub Data Transport bearer Release

RNC Decides todelete an existing

Radio Link

Radio Link Deletion Request

Radio Link Deletion ResponseRadio Link Deletion Response

stop Rx & Tx

Unsynchronized deletion



Inter-system Handover (UMTS to GSM)

U E 2 G M S CS R N C 3 G M S C

C h a n n e l a c t i v a ti o n

r o c e d u r e i n B S S

R e l o c a t io n R e q u i r e d

U E s w i t ch e s

o G S M B S S

H O C o m p l e te

M A P P r e p a r e H O R e s p o n s e

R N C D e c i d e s to

e r fo r m H O t o

G S M

H O f r o m U T R A N C o m m a n d

B S C

M A P P r e p ar e H O R e q .

H O R e q u e s t

H O R e q u e s t A C K

R e l o c a t i o n C o m m a n d

R a d i o L i n k F a i lu r e i n U T R A N a n d R a d i o L i n k E s ta b l is h m e n t i n G S M B S S

Iu Re leas e P rocedure

H O C o m p l e te

M A P S e n d E n d S i g n a l R e q .

F r e e u p o f

R e s o u r c e s

M A P S e n d E n d S i g n a l R e s p .



UTRAN Initiated UMTS-GPRS Cell Reselection

U E S G S NS erv ingR N C

R A N A P R A N A P6 . I u R e le a s e C o m m a n d

R A N A P R A N A P7 . I u R e l e as e C o m p l e t e

R R C R R C

2 . C e l l C h a n g e O r d e r f r o m

U T R A N

3 . T h e U E a c c e s s e s t h e G S M

s ys tem and in i t ia t es rou t ing a r ea

p d a te . T he p a c k e t c o n te x t is

r a n s fe r r e d t o t h e n e w S G S N .

R A N A P R A N A P4 . S R N S C o n t e x t R e q u e s t

R A N A P R A N A P5 . S R N S C o n t e x t R e s p o n s e

1 . U T R A N d e c i s i o n to p e r f o rm C e l l C h a n g e O r d e r fr o m U T R A N :

Most signalling between 2G and 2G CN


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SRNS Relocation (CS)


25/28


URA_PCH to CELL_DCH/ CELL_FACH Transition

Unsynchronised procedure with CRNC = SRNC

U E N o d e B S R N C

C e l l_ D C H : R a d i o B e a r e r R e c o n f i g u ra t io n C o m p l e te ( D C C H A M , D C H )

C e l l_ F A C H : U T R A N M o b i li ty C o n f ir m ( D C C H A M , R A C H )

R a d i o L i n k S e t u p r e q u e s t

UE T r a n s i t i o n s t o

C e l l D C H / s t a y s i n

C e l l _ F A C H

U E S e n d s C o m p l e te

M e s s a g e

L 2 A C K ( D C C H )

R a d i o L i n k S e t u p r e s p o n s e

R a d i o L i n k R e s t o r e I n d i c a ti o nC e l l _ D C H /

C e l l _ F A C H

C e l l U p d a t e C o n f ir m ( C C C H , F A C H , U M )

A L C A P I u b D a t a T r a n s p o r t b e a r e r S e tu p

U R A _ P C H

U E t e m p o r a r y in

C e l l _ F A C HI f C e l l _ D C H

I n c l . D B C c h e c k

F o r e a c h D C H ,

se p a r a t e ly

I n c l. U L / D L S y n c h .

C e l l U p d a t e ( C C C H , R A C H , T M , c a u s e p a g in g r e s p o n s e o r U p l i n k D a t a tr a n s m i s si o n )

R R C S t a t e I n d ic a t o r

C e l l _ D C H /

U R A _ F A C H

TA ct iv at io n

= N O W


26/28


CELL_FACH to CELL_DCH Transition

U E N o d e B R N C C N

R a d i o B e a r e r R e c o n fi g ur a ti o n C o m p l e te ( D C C H A M , D C H )

R a d i o B e a r e r R e c o n fi g u ra ti o n ( D C C H , F A C H )

R a d i o L i n k S e t u p r e q u e s t

R a d i o L i n k S e t u p r e s p o n s e

U E T r a n s i t io n s t o

C e l l D C H

U E S e n d s C o m p l e t e

M e s s a ge o n D C H

L 2 A C K ( D C H )

R N C d e t e rm i n e s U E

shou ld t rans i t ion to

C e l l D C H

R a d i o L i n k R e s t o r e I n d i c a t io n

R N C S t o ps M A C - d

T r a n s m i s s i o n t o U E

C e l l F A C H

C e l l D C H

A L C A P f o r bo th D C H

F P S y n c h



27/28


CELL_DCH to URA_PCH/ CELL_FACH Transition


U E N o d e B S R N C

R a d i o L i n k D e l e t io n R e q u e s t

R R C S t a t e I n d ic a t o r

C e l l _ F A C H /

U R A _ P C H

L 2 A C K ( D C C H , F A C H )

U E S e n d s C o m p l e te

M e s sa g e o n R A C H

R a d i o L i n k D e l e t i o n R e s p o n s e

C e l l _ F A C H /

U R A _ P C H

A L C A P I u b D a t a T r a n s p o r t B e a r e r R e l e as e

C e l l _ D C H

UE t r a n s i t io n s t o

C e l l_ F A C H a n d

e a d s S I B

Fr e e - u p n o n - u se d

D C H R e s o u rc e s

R a d i o B e a r e r R e c o n fi g u ra t io n ( D C C H , D C H , U M )

R a d i o B e a r e r R e c o n fi g u ra t io n C o m p l e te ( D C C H , R A C H , A M )

R N C l e a v e s ti m e

o r L 2 A C K b e in ge r r o r e d


28/28

Dynamic Bearer Reconfiguration

U E S R N C

R a d i o L i n k R e c o n f i g

P r e p a r e

N o d e B

(D r i f t

R N S )

N o d e B

(S erv i n g

R N S )

D R N C

R a d i o L i n k R e c o n f i g u r a t io n P r e p a r e

R a d i o L i n k R e c o n f i g u r a ti o n P r e p a r e

R a d i o L i n k R e c o n f i g u ra t io n R e a d yR a d i o L i n k R e c o n f i g R e a d y

R a d i o L i n k R e c o n f i g u ra t io n R e a d y

A L C A P I u r b e a re r S e tu p

R a d i o L i n k R e c o n f i g

c o m m i t (TA ct iv at io n )R a d i o L i n k R e c o n f i g u ra t io n C o m m i t (TA ct iv at io n )

R a d i o L i n k R e c o n f i g u ra t io n c o m m i t (TA ct iv at io n )

T r a n s p o r t C h a n n e l R e c o n f i g u r a ti o n ( D C C H , A M , TA ct iv at io n )

T r a n s p o rt C h a n n e l R e c o n f ig u r a ti o n C o m p l e te ( D C C H , A M )

A L C A P I u b D a t a T r a n sp o r t b e ar e r R e l ea s e

A L C A P I u b D a t a T r a n s p o r t b e a re r R e l e a s e A L C A P I u r b e a r e r R e le a s e

A L C A P I u b D a t a T r a n s p o r t b e a re r S e tu p

A L C A P I u b D a t a T r a n sp o r t b e ar e r S e tu p

C e l l D C H

C e l l D C H

R N C D e c id e s to

c h a n g e t h e r a t e o f

h e U E

A l l N o d e B s a r e

e a d y

A c t i v a t i o n T i m e

, TA ct iv at io n

U E & N o d e - B

e c o n f i g u r e d t o

h e n e w r a t e s

R e l e a s e t h e t r a n s p o r t

N e tw o rk re so u rc es fo r

h e p r e v i o u s

c o n f i g u r a t i o n

W h e n r a t e i n c r e as e

Synchronised DCH modify w/o transport bearer reconfiguration

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08a UTRAN Procedures Ws11

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