Download - 9 UTRAN Procedures
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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 release
RRM procedures
Radio link addition and deletion
SRNS relocation (CS)
Intersystem handover from UMTS to GSM (CS)
MM procedures -> see MM slides
CM 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 elementary
procedures required to enable the transport of user data (PS or CS
mode) or
the exchange of higher-layer signaling
messages (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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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
UE Node B
1.1
Node B
2.1
RNC
1
RNC
2
CN
R ANAPR ANAP1. Paging
2. PCCH : Paging Type 1
RANA P RANA P1. Paging
3. PCCH: Paging Type 1
(Requesting CN domain,
IMSI, ...)
Paging
RRC ConnectionEstablishment
Transaction Reasoning(Signalingconn. establishment)
AuthenticationandSecurity
TransactionSetup andRAB Allocation
Transaction(user orcontrolplane)
TransactionRelease andRAB Release
RRC ConnectionRelease
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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
UE Serving
R N C
C N
R R CR R C2. DCCH : Paging Type 2
R A N A P R A N A P1. Paging
Paging
RRC ConnectionEstablishment
Transaction Reasoning(Signalingconn. establishment)
AuthenticationandSecurity
TransactionSetup andRAB Allocation
Transaction(user orcontrolplane)
TransactionRelease andRAB Release
RRC ConnectionRelease
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RRC Connection Setup
Establishment of a RRC connection in cell_DCH mode
5 . Do wnlink Synchronisa t ion
U E N o d e B
Se rv ing R N SServing
R N C
D C H - F PD C H - F P
Al loca te R NT I
Selec t L1 and L2
parameters
R R CR R C1. C C C H : R R C C onne c t ion R e que s t
N B A PN B A P
3. Radio Link Se tup Response
N B A PN B A P
2. Radio Link Se tup Request
R R CR R C7 . C C C H : RRC C onnec t ion Se tup
Star t RX
Star t TX
4. ALCA P Iub Data Transpor t Bearer Se tup
R R CR R C9. DC C H : RRC Connec t ion Se tup Comple te
D C H - F PD C H - F P6. U pl ink Synchronisa t ion
N B A PN B A P
8. Radio Link Restore Indica t ion
Paging
RRC Connection Establishment
Transaction Reasoning(Signalingconn. establishment)
AuthenticationandSecurity
TransactionSetup andRAB Allocation
Transaction(user orcontrolplane)
TransactionRelease andRAB Release
RRC ConnectionRelease
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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 reestablishment Exchange of signaling messages (low/high priority)
RRC connection request message contains, e.g. IMSI, TMSI, IMEI
Location area, routing area identity, etc.
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NAS Signaling Connection Establishment(Transaction Reasoning)
UE Servin g
RN C
C N
1. RRC Connect ion Establishment
RRCRRC2. DCCH : Initial Direct Tran sfer
RA N A P RA N A P
3. Initial UE M essage
Payload contains system network message:
Information about the transaction initiatedby the UE (IMSI, TMSI, location area, kindof requested transaction)
Paging
RRC ConnectionEstablishment
Transaction Reasoning(Signalingconn. establishment)
AuthenticationandSecurity
TransactionSetup andRAB Allocation
Transaction(user orcontrolplane)
TransactionRelease andRAB Release
RRC ConnectionRelease
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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
RRC ConnectionEstablishment
Transaction Reasoning(Signalingconn. establishment)
Authentication andSecurity
TransactionSetup andRAB Allocation
Transaction(user orcontrolplane)
TransactionRelease andRAB Release
RRC ConnectionRelease
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Transition Setup and RAB Establishment(CS Mode)
Paging
RRC ConnectionEstablishment
Transaction Reasoning(Signalingconn. establishment)
AuthenticationandSecurity
Transaction Setup andRAB Allocation
Transaction(user orcontrolplane)
TransactionRelease andRAB Release
RRC ConnectionRelease
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Transition Setup and RAB Establishment(PS Mode)
Paging
RRC ConnectionEstablishment
Transaction Reasoning(Signalingconn. establishment)
AuthenticationandSecurity
Transaction Setup andRAB Allocation
Transaction(user orcontrolplane)
TransactionRelease andRAB Release
RRC ConnectionRelease
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Transaction Release and RAB Release(CS Mode)
Note: signaling connection and RRC connection remains
Paging
RRC ConnectionEstablishment
Transaction Reasoning(Signalingconn. establishment)
AuthenticationandSecurity
TransactionSetup andRAB Allocation
Transaction(user orcontrolplane)
Transaction Release andRAB Release
RRC ConnectionRelease
T ti R l d I R l
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Transaction Release and Iu Release(CS Mode)
Note: signaling connection and RRC connection are released
Paging
RRC ConnectionEstablishment
Transaction Reasoning(Signalingconn. establishment)
AuthenticationandSecurity
TransactionSetup andRAB Allocation
Transaction(user orcontrolplane)
Transaction Release andRAB Release
RRC Connection Release
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Transaction Release and RAB Release(PS Mode)
Note: signaling connection and RRC connection remain
Paging
RRC ConnectionEstablishment
Transaction Reasoning(Signalingconn. establishment)
AuthenticationandSecurity
TransactionSetup andRAB Allocation
Transaction(user orcontrolplane)
Transaction Release andRAB Release
RRC ConnectionRelease
T ti R l d I R l
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Transaction Release and Iu Release(PS Mode)
Note: signaling connection and RRC connection are released
Paging
RRC ConnectionEstablishment
Transaction Reasoning(Signalingconn. establishment)
AuthenticationandSecurity
TransactionSetup andRAB Allocation
Transaction(user orcontrolplane)
Transaction Release andRAB Release
RRC Connection Release
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RRC Connection ReleasePaging
RRC ConnectionEstablishment
Transaction Reasoning(Signalingconn. establishment)
AuthenticationandSecurity
TransactionSetup andRAB Allocation
Transaction(user orcontrolplane)
TransactionRelease andRAB Release
RRC Connection Release
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RRC Connection Release (involving DRNC)
Example: RRC connection release of a dedicated channel in soft HO mode
with DRNC
10. Radio Link Deletion Respo nse
8. Radio L ink Deletion
9. Radio Link D eletion Re sponse
6. Radio L ink Deletion
5. RRC Connection Release Complete
4. RRC Connection Release
11. Radio L ink D eletion R esponse
7. Radio L ink D eletion
U E N ode B Drif t RNS
Node BServing RNS
DriftRN C
ServingRN C
CN
RRC
R RCRRC
N B A P
N B A P
RNSAP
N B A PN B A P
N B A P
R N S A P
R A N A P
R A N A P
3. ALCAP Iu Bearer Release
ALCAP Iur Bearer
Release13. ALCAP Iub Bearer Release
12. ALCAP Iub Bearer Release
1. Iu Release Command
2. Iu Release Comp lete
R RC
R A N A P
N B A P
R N S A P
N B A P
N B A P
RNSAP
R A N A P
n Paging
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So
ftHand
over
RadioL
inkAd
dition Paging
RRC ConnectionEstablishment
Transaction Reasoning(Signalingconn. establishment)
AuthenticationandSecurity
TransactionSetup andRAB Allocation
Transaction(user or control plane)
TransactionRelease andRAB Release
RRC ConnectionRelease
n Paging
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So
ftHand
over
RadioL
inkDeletion Paging
RRC ConnectionEstablishment
Transaction Reasoning(Signalingconn. establishment)
AuthenticationandSecurity
TransactionSetup andRAB Allocation
Transaction(user or control plane)
TransactionRelease andRAB Release
RRC ConnectionRelease
) Paging
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SR
NSRelocation
(CS) Paging
RRC ConnectionEstablishment
Transaction Reasoning(Signalingconn. establishment)
AuthenticationandSecurity
TransactionSetup andRAB Allocation
Transaction(user or control plane)
TransactionRelease andRAB Release
RRC ConnectionRelease
r )
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Inte
r-syste
mHandover
(UMTStoGSM