Lte protocols

PCRF

Overall Architecture

X2-UP

S1-UP

EPC

S1-CP

E-UTRAN

eNodeBeNodeB

S11

MME

S-GW

P-GW

S5/S8

X2-CP

P-CSCF

S7/Gx

Network & Service management

OSS-RC EMA

MM DNS/ENUM

HSS

S-CSCF

I-CSCFIMS Control layer

Platforms / Concepts

TSP/NSP or TSP/IS

DNS/ENUM

MGC

MGW

SUN

IS

A-SBG

CPP /RBS6000

Juniper/Redback

WPP

GERAN UTRAN

Broadband Wired Access

GPRS Packet Core

SGSN

GGSN

CDMA2000HRPD

(EV-DO)

WLAN

N-SBG

Internet

S6a

CS Core

MSC

GWMSC

PSTN

PDSN

S1-AP, X2-AP

H.248

ISUP

Diameter

S3

S4

GTP-C

Gxa

S103

S2a

RNCOther

SIP/UDP or SIP/TCP

Rx+

User dataRTP/UDP GTP/UDP

S101

IMS Connectivitylayer

Service LayerAS AS ASApplication ServersMTAS

S6d

Uu

ROHC/Ciphering

TM AM UM

UE Protocol Stack

Physical Layer

L2

PDCP

RLC

MAC

RRC

NAS

Integrity/Ciphering

System InfoAquisition

Cell Selection

Paging Reception

Mobility Management

Session Management

Connected Mode

Mobility

NAS Security

IP

Application

AS SecurityRRC

ConnectionRB

ManagementvMeasurement

Reporting

Co

ntr

ol/R

ep

ort

SA

Ps

RA ControlHARQ

Control

Segmentation, ARQ

Ciphering

Header Compr.

Hybrid ARQHybrid ARQ

MAC multiplexing

Antenna and resrouce mapping

Coding + RM

Data modulation

Antenna and resource mapping

Coding

Modulation Antenna and resource assignment

Modulationscheme

MA

C s

ched

ule

r Retransmission control

Priority handling, payload selection

Payload selection

RLC#i

PHY

PDCP#i

User #i User #j

MAC

Concatenation, ARQ

Deciphering

Header Compr.

Hybrid ARQHybrid ARQ

MAC demultiplexing

Antenna and resrouce mapping

Coding + RM

Data modulation

Antenna and resource demapping

Decoding

Demodulation

RLC

PHY

PDCP

MAC

eNodeB UE

Red

unda

ncy

vers

ion

IP packet IP packet

EPS bearers

E-UTRA Radio Bearers

Logical Channels

Transport Channels

Physical Channels

Protocol interacti

on

UL-SCH

Channel mapping

PCH DL-SCH

PCCHLogical Channels “type of information” (traffic/control)

Transport Channels“how and with what characteristics” (common/shared/mc/bc)

Downlink Uplink

PDSCH

Physical Channels“bits, symbols, modulation, radio frames etc”

MTCH MCCH BCCH DTCH DCCH DTCH DCCH CCCH

PRACH

RACH

CCCH

MCH BCH

PUSCHPBCH PCFICH PUCCH

-CQI -ACK/NACK-Sched req.

-Sched TF DL-Sched grant UL-Pwr Ctrl cmd-HARQ info

MIB SIB

PMCH PHICHPDCCH

ACK/NACKPDCCH

info

Physical Signals“only L1 info”

RS SRSP-SCH S-SCH RS

-meas for DL sched -meas for mobility-coherent demod

-half frame sync-cell id

-frame sync-cell id group -coherent demod

-measurements for UL scheduling

QCI Characteristics

QCI Resource

Type

Priority

Packet Delay Budg

et

Packet Error Loss Rate

Example Services

1

GBR

2 100 ms 10-2 Conversational Voice

2 4 150 ms 10-3 Conversational Video (Live Streaming)

3 5 300 ms 10-6 Non-Conversational Video (Buffered Streaming)

4 3 50 ms 10-3 Real Time Gaming

5 1 100 ms 10-6 IMS Signalling

6

Non-GBR

7 100 ms 10-3

Voice,

Video (Live Streaming)

Interactive Gaming

7 6

300 ms 10-6

Video (Buffered Streaming)

8 8 TCP-based (e.g., www, e-mail, chat, ftp,

9 9 p2p file sharing, progressive video, etc.

QCI Resource

Type

Priority

Packet Delay Budg

et

Packet Error Loss Rate

Example Services

1

GBR

2 100 ms 10-2 Conversational Voice

2 4 150 ms 10-3 Conversational Video (Live Streaming)

3 5 300 ms 10-6 Non-Conversational Video (Buffered Streaming)

4 3 50 ms 10-3 Real Time Gaming

5 1 100 ms 10-6 IMS Signalling

6

Non-GBR

7 100 ms 10-3

Voice,

Video (Live Streaming)

Interactive Gaming

7 6

300 ms 10-6

Video (Buffered Streaming)

8 8 TCP-based (e.g., www, e-mail, chat, ftp,

9 9 p2p file sharing, progressive video, etc.

TS 23.203

CN Initiated Paging

TAC 1

S1AP Paging message

RRC Paging message

TAC 2

The MME sends the PAGING message to each eNode B with cells belonging to the tracking area(s) in which the UE is registered.

Each eNode B can contain cells belonging to different tracking areas, whereas each cell can only belong to one TA.

UEs use DRx when in idle mode in order to wake at regular intervals to check for paging messages.

The paging response back to the MME is initiated on NAS layer and is sent by the eNB based on NAS-level routing information.

MME

UE

Atta

chMME

7. INITIAL UE MESSAGE (Attach Request)

14. INITIAL CONTEXT SETUP REQUEST(EPS bearers, Attach Accept, Security)

22. INITIAL CONTEXT SETUP RESPONSE(EPS bearers)

1. System Information *

4. RRC CONNECTION REQUEST

5. RRC CONNECTION SETUP

15. RRC SECURITY MODE COMMAND

16.RRC SECURITY MODE COMPLETE

6. RRC CONNECTION SETUP COMPLETE (Attach Request)

2. Random Access Preamble

3. Random Access Response

20. RRC CONNECTION RECONFIGURATION (Bearer Setup)21. RRC CONNECTION RECONFIGURATION COMPLETE

10.RRC DL INFORMATION TRANSFER (Authentication Request)

11. RRC UL INFORMATION TRANSFER (Authentication Response)

DL NAS TRANSFER (Authentication)

UL NAS TRANSFER (Auth. Response)

12. RRC DL INFORMATION TRANSFER (Security Mode Command)

13. RRC UL INFORMATION TRANSFER (Security Mode Complete)

DL NAS TRANSFER (NAS SMC)

UL NAS TRANSFER (NAS SMC)

CellSelect *

23. RRC UL INFORMATION TRANSFER (Attach Complete)) UL NAS TRANSFER (Attach Complete)

RRC IDLE

RRC IDLE

8.RRC DL INFORMATION TRANSFER (UE Identity Request)

9. RRC UL INFORMATION TRANSFER (UE Identity Response)

DL NAS TRANSFER (UE Identity Req)

UL NAS TRANSFER (UEid Response)

17. RRC UE CAPABILITY ENQUIRY

18. RRC UE CAPABILITY iNFORMATION

19. UE CAPABILITY INFO INDICATION(UE Radio Capability)

24. UE CONTEXT RELEASE COMMAND

26. RRC CONNECTION RELEASE 25. UE CONTEXT RELEASE COMPLETE

Opt

ion

al

Con

nect

ion

Rea

ctiv

atio

n

MME

7. INITIAL UE MESSAGE (Service Request)

12. INITIAL CONTEXT SETUP REQUEST(EPS bearers, Security, UECap Request)

20. INITIAL CONTEXT SETUP RESPONSE(EPS bearers)

1. System Information *

4. RRC CONNECTION REQUEST

5. RRC CONNECTION SETUP

13. RRC SECURITY MODE COMMAND

14.RRC SECURITY MODE COMPLETE

6. RRC CONNECTION SETUP COMPLETE (Service Request)

2. Random Access Preamble

3. Random Access Response

18. RRC CONNECTION RECONFIGURATION (Bearer Setup,Measurement conf))

19. RRC CONNECTION RECONFIGURATION COMPLETE

8.RRC DL INFORMATION TRANSFER (Authentication Request)

9. RRC UL INFORMATION TRANSFER (Authentication Response)

DL NAS TRANSFER (Authentication)

UL NAS TRANSFER (Auth. Response)

10. RRC DL INFORMATION TRANSFER (Security Mode Command)

11. RRC UL INFORMATION TRANSFER (Security Mode Complete)

DL NAS TRANSFER (NAS SMC)

UL NAS TRANSFER (NAS SMC)

CellSelect *

Opt

ion

al

15. RRC UE CAPABILITY ENQUIRY

16. RRC UE CAPABILITY iNFORMATION

17. UE CAPABILITY INFO INDICATION(UE Radio Capability)

RRC IDLE

RRC CONNECTED

Opt

ion

al

Data flow in DL

PDCP SDU

Higher Layer Payloadheader

HPDCP(Header Compression& Ciphering)

PDCPheader

Higher Layer PDURadio Bearer 1

RLC SDU

MAC(multiplexing)

MAC SDU

CRCPHY Transport Block

MACheader

Higher Layer Payloadheader Higher Layer Payloadheader



H H

PDCP SDUPDCPheader

PDCP SDUPDCPheader

RLCheader

RLCheader

RLC SDU

RLCheader

RLC SDU

MAC SDUMAC

header

CRCTransport Block

RLC PDU RLC PDU RLC PDU

MAC PDU MAC PDU

RLC(segmentation & concatenation)

PDCP SDU

Higher Layer Payloadheader

HPDCP(Header Compression& Ciphering)

PDCPheader


RLC SDU

MAC(multiplexing)

MAC SDU

CRCPHY Transport Block

MACheader

Higher Layer Payloadheader Higher Layer Payloadheader



H H

PDCP SDUPDCPheader

PDCP SDUPDCPheader

RLCheader

RLCheader

RLC SDU

RLCheader

RLC SDU

MAC SDUMAC

header

CRCTransport Block

RLC PDU RLC PDU RLC PDU

MAC PDU MAC PDU

RLC(segmentation & concatenation)

X2

Han

dove

rMME

RRC CONNECTED

S-GW

Source eNB Target eNB1. RRC CONNECTION RECONFIGURATION

(Bearer Setup,Measurement conf))

2. RRC Measurement Report (Event A3)

3. HO Decision

4. X2 HANDOVER REQUEST

5.Admission Control

6. X2 HANDOVER REQUESTACKNOWLEDGE

10. RRC CONNECTION RECONFIGURATION (Handover Command,Measurement conf)

7. X2 SN STATUS TRANSFER 8. Start Data

forwarding

9. Buffer Forwarded

Data

11 MAC: CFRA Random Access Preamble

12. MAC Random Access Response (UL allocation + TA)

13. RRC CONNECTION RECONFIGURATION COMPLETE(Handover Complete)

15. S1 PATH SWITCH REQUEST

16. S5 USER PLANE UPDATE REQ

18. S5 USER PLANE UPDATE RSPONSE

19. S1 PATH SWITCH RESPONSE

20. X2 UE CONTEXT RELEASE RRC CONNECTED

14.Data Transfer in Target

21. Forward if any Data in transition

and release

T304

TRELOCprep

RegenerateSecurity Keys


RRC CONNECTED

S-GW

Source eNB Target eNB1. RRC CONNECTION RECONFIGURATION

(Bearer Setup,Measurement conf))

2. RRC Measurement Report (Event A3)

3. HO Decision

4. S1 HANDOVER REQIRED (Source to Target Transparent Container )

8. Admission Control

9. S1 HANDOVER REQUEST ACKNOWLEDGE

12. RRC CONNECTION RECONFIGURATION (Handover Command,Measurement conf)

13 MAC: CFRA Random Access Preamble

14. MAC Random Access Response (UL allocation + TA)

15. RRC CONNECTION RECONFIGURATION COMPLETE(Handover Confirm)

RRC CONNECTED

T304

TS1RELOCprep

RegenerateSecurity Keys


MME MMES-GW

TargetTarget

5. S10 FORWARD RELOCATION REQUEST

6. S11 CREATE BEARER REQ/RES

7. S1 HANDOVER REQUEST

10. S10 FORWARD RELOCATION RESPONSE

12. S1 HANDOVER COMMAND

18.S10 FORWARD RELOCATION COMPLETE/ ACK

Source SourceS

1 H

ando

ver

19. S1 UE CONTEXT RELEASE COMMAND(Cause: Successful Handover)

UP Forwarding

Source eNB Target eNB SourceSource eNB Target eNB TargetSourceSource eNB Target eNB SourceTargetSourceSource eNB Target eNB TargetSourceTargetSourceSource eNB Target eNB

11. S11 CREATE BEARER REQ/RES

16. S1 HANDOVER NOTIFY

LTE to 3G Handover

SGSN

RNC

MME

sourceS-GW

PDN-GW

targetS-GW

1

1. Handover Required2. Forward Relocation Request3. Create PDP Context Request4. Create PDP Context Response5. Relocation Request6. Relocation Request Ack7. Update PDP Context Request8. Update PDP Context Response9. Forward Relocation Response10. Create Bearer Request11. Create Bearer Response12. HO Command13. HO from E -UTRAN Command14. HO to UTRAN Complete15. Relocation Complete16. Forward Relocation Complete17. Forward Relocation Complete Ack18. Update PDP Context Request19. Update Bearer Request20. Update Bearer Response21. Update PDP Context Response

2

34

5 6

78

9

10

11

12

1314

15

16

1718

19

20

21

SGSNSGSN

RNC

MME

LTE to 3G Cell-reselection

SGSN

RNC

MME

PDN-GW

S-GW

1a. Routing Area Update Request1b. Routing Area Update Request2. Context Request3. Context Response4. Context Acknowledge5. Update Bearer Request6. Update Bearer Request7. Update Bearer Response8. Update Bearer Response9. Routing Area Update Accept10. Routing Area Update Complete

2

1b 3

1a

6

7

4

58

9

10

SGSNSGSN

RNC

MME

Education

Lte protocols