umts course epfl 21.12.04 part 1 2
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UMTS course
Introduction
UMTS principles
Network Architecture
WCDMA Basics General Protocols Model
Radio Resource Management and ATM transmission
UMTS Evolution
HSDPA TDD
All IP
UMTS Project
Network Architecture and Design Rollout
System Acceptance Testing
Network Performances
Launch
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Radio Interface Protocols
Architecture
control
Logical Channels
Transport Channels
PHY (WCDMA L1)
RLC
MAC
RLC
RLC
RLC
RLC
RLC
RLC
RLC
BMC
RRC control
control
control
control
L3
L2
L1
User PlaneControl Plane
RadioBearers
PDCP
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Uu interface Layer 1 Services
L1 services :
Information transfer to MAC and higher layers on common and dedicated transportchannels:
Random Access Channel (RACH)
Common Packet Channel (CPCH)
Forward Access Channel (FACH)
Downlink Shared Channel (DSCH)
Broadcast Channel (BCH)
Paging Channel (PCH)
Dedicated Channel (DCH)
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Uu interface Layer 1 Functions
L1 functions:
Macrodiversity distribution/combining and soft handover execution
Error detection on transport channels and indication to higher layers
FEC encoding/decoding and interleaving/deinterleaving of transport channels
Multiplexing of transport channels and demultiplexing of coded composite transportchannels
Rate matching
Mapping of coded composite transport channels on physical channels;
Power weighting and combining of physical channels
Modulation and spreading/demodulation and despreading of physical channels
Frequency and time (chip, bit, slot, frame) synchronisation
Measurements and indication to higher layers (e.g. FER, SIR, interference power, transmitpower, etc.)
Closed-loop power control
RF processing
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Medium Access Control Protocol:
MAC Services
MAC Services to upper Layer: Data transfer service on logical channels classified in control and traffic channels
Reallocation of radio resources and MAC parameters.
Reporting of measurements.
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Medium Access Control Protocol:
MAC Functions
MAC Functions:
Mapping between logical channels and transport channels.
Selection of appropriate Transport Format for each Transport Channel depending oninstantaneous source rate.
Priority handling between data flows of one UE.
Priority handling between UEs by means of dynamic scheduling
Identification of UEs on common transport channels
Multiplexing/demultiplexing of upper layer PDUs into/from transport blocks deliveredto/from the physical layer on common transport channels.
Multiplexing/demultiplexing of upper layer PDUs into/from transport block sets deliveredto/from the physical layer on dedicated transport channels.
Traffic volume measurement.
Transport Channel type switching.
Ciphering.
Access Service Class selection for RACH and CPCH transmission
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Radio Link Control Protocol:
RLC Services
RLC Services to upper layer:
Transparent data transfer.
Notification of unrecoverable errors
Maintenance of QoS as defined by upper layers
Unacknowledged data transfer QoS setting
Acknowledged data transfer.
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RLC Functions
Segmentation and reassembly
Concatenation
Padding
Transfer of user data
Error correction
In-sequence delivery of upper layer PDUs Duplicate Detection
Flow control
Sequence number check
Protocol error detection and recovery Ciphering
Radio Link Control Protocol:
RLC FunctionsRLC Functions
Polling
Status transmission
SDU discard
Estimated PDU Counter (EPC) mechanis
Suspend/resume function Stop/continue function
Re-establishment function
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Air Interface Protocols
RRC
RRCRRC
ControlPlane
UE WBTS
RLC
SRNC
MAC
FPFPWCDMA
L1
RLC
WCDMAL1
MAC
FP
DRNC
Transport andtransmission
layer
Transport andtransmission
layer
Transport andtransmission
layers
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Radio Resource Control Protocol:
RRC functions Broadcast of information related to the non-access stratum (Core Network);
Broadcast of information related to the access stratum;
Establishment, maintenance and release of an RRC connection between the UE and UTRAN;
Establishment, reconfiguration and release of Radio Bearers;
Assignment, reconfiguration and release of radio resources for the RRC connection;
RRC connection mobility functions;
Control of requested QoS;
UE measurement reporting and control of the reporting;
Outer loop power control;
Control of ciphering;
Paging;
Initial cell selection and cell re-selection;
Arbitration of radio resources on uplink DCH;
RRC message integrity protection;
CBS control.
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Air Interface Protocols
UserPlane
PDCP
NRT & RTRT
UE WBTS
RLC
SRNC
MAC
FPFPWCDMA
L1
RLC
WCDMAL1
MAC
FP
DRNC
Transport andtransmission
layer
Transport andtransmission
layer
Transport andtransmission
layers
PDCP
NRT & RTRT
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TransportNetwork
Layer
RadioNetwork
Layer
ALCAP(s)
SignallingBearer(s)
ApplicationProtocol
SignallingBearer(s)
DataStream(s)
DataBearer(s)
User PlaneControl Plane
Transport
NetworkControl Plane
Transport
NetworkUser Plane
Transport
NetworkUser Plane
Physical Transmission layer
General Protocol Model
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Protocol Structure for Iub
3G TS 25.430
TransportNetwork
Layer
RadioNetwork
Layer
Q.2630.1
NBAP
D
CH
F
P
AAL2
Transport NetworkUser Plane
Transport NetworkUser Plane
ATM
Transport NetworkControl Plane
Physical Transmission layer
AAL5
SSCF-UNISSCOP
AAL5
Q.2150.2SSCF-UNI
SSCOP
RA
CH
F
P
FA
CH
F
P
P
CH
F
P
DS
CH
F
P
CP
CH
F
P
User PlaneControl Plane
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NBAP specific elementary procedures
Radio Link Management. Radio Link Supervision. Compressed Mode Control Measurements on Dedicated Resources DL Power Drifting Correction
Reporting of General Error Situations
Functions have same elementaryprocedures as RNSAP
Function Elementary Procedure(s)Cell Configuration Management a) Cell Setup
b) Cell Reconfigurationc) Cell Deletion
Common Transport Channel Management a) Common Transport Channel Setupb) Common Transport Channel Reconfigurationc) Common Transport Channel Deletion
System Information Management System Information UpdateResource Event Management a) Block Resource
b) Unblock Resource
c) Resource Status IndicationConfiguration Alignment a) Audit Requiredb) Auditc) Reset
Measurements on Common Resources a) Common Measurement Initiationb) Common Measurement Reportingc) Common Measurement Termination
d) Common Measurement Failure
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Protocol Structure for Iur
TransportNetworkLayer
RadioNetwork
Layer
Q.2630.1
RNSAPDCHFP
AAL2
Transport NetworkUser Plane
Transport NetworkUser Plane
ATM
Transport NetworkControl Plane
Physical Transmission layer
AAL5
SCCPMTPb3
SSCF-NNISSCOP
AAL5
Q.2150.1MTPb3
SSCF-NNISSCOP
CCHFP
User PlaneControl Plane
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RNSAP Radio Network Subsystem
Application Part
RNSAP defines interactions between SRNC and DRNC over Iub interface
RNSAP consists of Elementary Procedures (EP)'s, here Class 1 and Class 2
RANAP provide following servicesRNSAP Basic Mobility Procedures (Related to a specific UE)RNSAP DCH ProceduresRNSAP Common Transport Channel ProceduresRNSAP Global ProceduresSupport of parallel transactions
RANAP services expected from Signalling TransportConnection oriented data transfer serviceConnectionless data transfer service
RNSAP Function
EP (class1) EP (class2)
Request Message
Success Failure
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Protocol Structure for Iu-CS
TransportNetworkLayer
RadioNetwork
Layer
Q.2630.1
RANAP
Iu User Plane
Protocol
AAL2
ATM
Control Plane
Transport NetworkControl Plane
User Plane
Physical Transmission layer
AAL5
SCCPMTP3
SSCF-NNISSCOP
AAL5
Q.2150.1MTP3
SSCF-NNISSCOP
Transport NetworkUser Plane
Transport NetworkUser Plane
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RANAP Radio Access Network
Application Part for Iu-CSRANAP defines interactions between RNS and CN
RANAP consists of Elementary Procedures (EP)
Class 1: EP's with response, success or failureClass 2: EP's without responseClass 3: EP's with possibility of multiple responses
RANAP provide following signalling servicesGeneral control services
Notification servicesDedicated control services
RANAP services expected from Signalling TransportConnection oriented data transfer serviceConnectionless data transfer service
General RANAP functionsManagement of Iu resources, signalling and RAB'sTransport of NAS signalling messages between UE and CNControlling the security mode in the UTRAN (ciphering and integrity protection)Controlling and transferring location reporting
Data volume reporting for unsuccessfully transmitted DL DataUE Management like paging, UE Common ID sending, controlling UE activity tracing
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Protocol Structure for Iu-PS
TransportNetworkLayer
RadioNetwork
Layer RANAPIu User Plane
Protocol
Transport NetworkUser Plane
Transport NetworkUser Plane
ATM
Transport NetworkControl Plane
Physical Transmission layer
AAL5
SCCPMTPb3
SSCF-NNISSCOP
AAL5
GTP-UUDP
IP
User PlaneControl Plane
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RANAP Radio Access Network
Application Part for Iu-PS Radio Access Bearer (RAB) Management functions
Radio Resource Management functions
Iu link Management functions
Iu User-plane (RNL) Management
Mobility management functions
Security functions
Service and Network Access functions
Iu Co-ordination functions
Separation of each UE for mobile specific signalling management
Relocating the SRNS to another RNS and changing the IU connection point for a UE(streamlining)
Transfer of transparent non-access signalling
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UMTS course
Introduction
UMTS principles
Network Architecture
WCDMA Basics General Protocols Model
Radio Resource Management and ATM transmission
UMTS Evolution
HSDPA TDD
All IP
UMTS Project
Network Architecture and Design
Rollout
System Acceptance Testing
Network Performances
Launch
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Radio Resource Management
BLER or BERtarget, SIR target
RRC Connection Request
RBinformation
Resource
information
Active setinformation
Load
information
Admission Control
RRC admission decision Default set of transport
channel and RLCparameters
(Directed RRCconnection set-up)
Load Control
Power Control
UL Outer LoopPower Control
Handover Control
Active state mobility
control
Resource Manager
Code allocationTransport resource allocation
info
PacketScheduler
Radio resourcescheduling
Cell load
status
Load change
information
Iub
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Admission Control
Radio Access Bearersin Uu Interface
UuInter
faceBa
ndwi
dth
SIR - Allowed Rang
Admission Control
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Hand Over Control
4
B SSector 1f1
Sector 2f1
Sector 3f1
Multipath Signalthrough Sector 1
Multipath Signalthrough Sector 3
4
B SB S
Frequencyf1
Frequencyf1
R N C R N CIur
Iub Iub
Softer
HO
Hard Intra FrequencyHO
4
B TSB S
WCDMA GSM900/1800
Inter System
HO
4
B SB S
Frequencyf1
Frequencyf1
4
B SB S
Frequencyf1
Frequencyf2
Soft HO
Hard Inter FrequencyHO
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Resource Manager
Primary Scrambling Code
Secondary Scrambling Code #1
Secondary Scrambling Code #2
Secondary Scrambling Code #15
Channelisation Code Set (256 Codes)
Channelisation Code Set (256 Codes)
Channelisation Code Set (256 Codes)
Channelisation Code Set (256 Codes)
Primary Scrambling Code
Secondary Scrambling Code #1
Secondary Scrambling Code #2
Secondary Scrambling Code #15
Channelisation Code Set (256 Codes)
Channelisation Code Set (256 Codes)
Channelisation Code Set (256 Codes)
Channelisation Code Set (256 Codes)
- 512 Code Sets x 16 Scrambling Codes = 8192 Codes numbered from 0 ... 8191 available
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Power Control
4
B SRNC
Open Loop Power Control (Initial Access)
Closed Loop Power Control
Outer Loop Power Control
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Packet Scheduler
time
packet service session
packet call
reading time
packet size packet arrival interval
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Load Control
Overload
Load Target
Overload Margin
Power
Estimated capacity forNRT traffic.
Measured load causedby non-controllable load
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ATM in Brief (1/6)
Header (5 bytes)Payload (48 bytes)
ATM Cell
GFC VPI
VPI VCI
VCI
VCI PT CL
HEC
Payload Data 48 Bytes
1 2 3 4 5 7Bit number:
He
ader(5Bytes
GFC = Generic Flow
VPI = Virtual Path IdentifierVCI = Virtual ChannelPT = Payload TypeCLP = Cell Loss PriorityHEC = Header Error Control
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ATM in Brief (2/6)
48 bytes
5 bytes
HEADER PAYLOAD
ATM cell (53 bytes)
Transmission pathVirtual Path (VP)Virtual Channel (VC)ATM CellATM Layer
HEADER
PAYLOAD
ATM i B i f (3/6)
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ATM in Brief (3/6)
AAL2
String of AAL2 Packet Data Units String of AAL2 Packet Data Units
31 2 3 1 2
AAL2 header
HEADER PAYLOADATM cell
3ATM CELLHEADERATM CELLHEADER1 2 3 1 1 2
OFFSET FIELD, 1-byte (indicates where the next AAL2 PDU starts)
AAL2 PACKET, 3-byte header, variable length payload (packet size up to 48 bytes or fixed 64 bytes)
ATM CELL, 5-byte header + 48-byte payload
PADDING
e.g., 3 differentusers
ATM i B i f (4/6)
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ATM in Brief (4/6)
AAL5
PADDING FIELD, variable length to fill the 48-byte ATM cell
AAL5 PACKET, 5-byte header, variable length payload, 8-byte trailer
ATM CELL, 5-byte header + 48-byte payload
USER DATA = Variable length 1-65,535 bytes USER DATA = Variable length 1-65,535 bytes
AAL5 Packet Data Unit AAL5 Packet Data Unit
AAL5 header
PAYLOAD= N x 48 BYTES
ATM cell 1 ATM cell 2... ..ATM cell n
ATM in Brief (5/6)
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ATM in Brief (5/6)
ATM over E1
Header Payload
ATM cell
0 1 2 16 1817 3115
TS0TS1-15
TS16TS17-31
. . . . ..
0 1 2 16 1817 3115
TS0TS1-15
TS16TS17-31
. . . . ..
E1 frameE1 frame
ATM in Brief (6/6)
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ATM in Brief (6/6)
ATM over SDH
STM-1 (155,52 Mbps) can fit 44.15 cells per frame -> 353 207 cells per second.
VC-4
VP1
VP2
VP3
Section
Overhead
.
.
.
260 bytes
9 bytes
P
O
H
9 bytes
1 byte
VC-4
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