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Revision RecordCourse Code Product

Product

VersionCourse Version ISSUE

OEA000200 LTE 3GPP R8 1.00

Developer/Modifier Time Approver New/Update

Don’t Print This Page

Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page0

Zhu Dianrong 2010-5-10 New

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LTE Protocols and

Procedures

www.huawei.com

Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.

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Contents1. EPS Architecture

2. EPS Protocols

3. LTE/SAE Quality of Service


.

5. Packet Data Convergence Protocol

6. Radio Link Control and Medium Access Control

7. X2/S1 Interface and Protocols

8. Mobility in LTE

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2. EPS Protocols



.




8. Mobility in LTE

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1.1 EPS Network Elements

1.2 EPS Interfaces


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1.1 EPS Network Elements1.2 EPS Interfaces


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E-UTRAN Architecture


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User Equipment


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UE Categories

UE Category Maximum

DownlinkData Rate

Number of

DownlinkData Streams

Maximum

Uplink DataRate

Support for

Uplink64QM

1 10.3Mbit/s 1 5.2Mbit/s No





5 302.8Mbit/s 4 75.4Mbit/s Yes

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UE Identities IMSI (International Mobile Subscriber Identity)

IMEI (International Mobile Equipment Identity)

GUTI (Globally Unique Temporary Identity)

- -


IP Address - This may either be an IPv4 or IPv6 address

Page9

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Evolved Node B


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eNB Identities TAI (Tracking Area Identity) - is a logical group of

neighboring cells defined by the service provider in which an

LTE idle UE is able to move within without needing to

update the network. As such, it is similar to a RAI (Routing


Area Identity) used in 2G and 3G packet switched networks.

ECGI (Evolved Cell Global Identity) - is comprised of the

MCC, MNC and ECI (Evolved Cell Identity), the later being

coded by each service provider.

Page11

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Femto Cells In order to improve network coverage and capacity, the

3GPP have developed a new type of base station to operate

within the home or small business environment. Termed the

HeNB (Home Evolved Node B).


In additional identities which have been introduced by the3GPP for femto cell operation. These are:

CSG (Closed Subscriber Group) Identity.

HeNB.

Page12

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Mobility Management Entity


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Serving - Gateway


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Packet Data Network - Gateway


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1.1 EPS Network Elements

1.2 EPS Interfaces


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E-UTRAN Interfaces

UuS1-MME

S1-MME


X2

-

S1-U

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EPC Architecture and Interfaces

S1-MMES10


S1-U

S11

S5/S8 SGi

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Additional Network Elements and

Interfaces

S10

S6a

S101

S3

S13

CDMA

2000


S11

S5/S8 S2a

Gx

S2bS103

S12

S4

CDMA

2000

Trusted

N!"3G##

$#"A%%ess

U!trusted

N!"3G##

$#"A%%ess

&!

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Questions Which Release 8 UE category supports MIMO 4x4?

a.1.

b.2.

c. 3


d. 4

e. 5

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Questions True / False. An LTE system does not use the IMSI.


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Questions Which node terminates the UE’s NAS signaling?

a.eNB.

b.MME.

c. S-GW


d. PDN-GW.

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Questions Which interface connects the eNB to the MME?

a.X2.b. S1-MME.

c. S1-U


d.S5.

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Questions Which interface connects an eNB logically to another eNB?

a.X2.b. S1-MME.

c. S1-U


d.S5.

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2. EPS Protocols3. LTE/SAE Quality of Service


.




8. Mobility in LTE

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Contents2. EPS Protocols

2.1 EPS Signaling

2.2 EPS Protocols

2.3 E-UTRAN Channel Mapping


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2.1 EPS Signaling

2.2 EPS Protocols



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LTE Control Plane


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LTE User Plane


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2.1 EPS Signaling

2.2 EPS Protocols



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Uu Interface Protocols


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NAS EMM and ESM ProceduresEMM !ro"e#ures ESM !ro"e#uresAttach Default EPS Bearer Context Activation

Detach Dedicated EPS Bearer Context Activation

Tracking Area Update EPS Bearer Context Modification

Service Request EPS Bearer Context Deactivation

Extended Service Request UE Requested PDN Connectivity


Authentication UE Requested Bearer Resource Allocation

Identification UE Requested Bearer Resource Modification

Security Mode Control ESM Information Request

EMM Status ESM Status

EMM Information

NAS Transport

Paging

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Radio Resource Control


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Packet Data Convergence Protocol


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Radio Link Control


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Physical Layer


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Physical Layer


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X2 Interface


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S1 Interface

User"#'a!e

S1-U


$#

(a)er"2

(a)er"1

UD#

GT#-U

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S11 Interface


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S5/S8 Interface


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-

C!tr'"#'a!e

S10

S10 Interface


$#

(a)er"2

(a)er"1

UD#

Page44

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SGi

SGi Interface


$#

(a)er"2

(a)er"1

TC#"/"UD#

Page45

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Contents

2. EPS Protocols

2.1 EPS Signaling

2.2 EPS Protocols



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LTE Channels


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Logical Channels


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Traffic Logical Channels


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LTE Release 8 Transport Channels

.C,

#C,


-

AC,

U(-SC,

C

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Downlink Physical Channels

PBCH (Physical Broadcast Channel)

PCFICH (Physical Control Format Indicator Channel)

PDCCH (Physical Downlink Control Channel)


PDSCH (Physical Downlink Shared Channel)

U li k Ph i l Ch l

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Uplink Physical Channels

PRACH (Physical Random Access Channel)

PUCCH (Physical Uplink Control Channel)

PUSCH (Physical Uplink Shared Channel)


R di Ch l

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Radio Channels


D li k Ch l M i

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Downlink Channel Mapping


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Q estions

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Questions

What is the main control signaling protocol between the UE

and the MME?

a.RRC.

b.RLC.


c. S1AP

d.NAS.

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Questions

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Questions

Which protocol on the air interface is responsible for User

Plane ciphering/encryption?

a.RRC.

b.PDCP.


c. RLC.

d.MAC.

Questions

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Questions

Which protocol is used to carry S1AP and X2AP signaling?

a. GTPv1-U.

b.PDCP.

c. GTPv2-C.


d.TCP.

e.SCTP.

Questions

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Questions

What control protocol is used between the MME and the S-

GW?

a. GTPv1-U.

b.PDCP.


c. GTPv2-C.

d.TCP.

e.SCTP.

Contents

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Contents

1. EPS Architecture

2. EPS Protocols



.




8. Mobility in LTE

Contents

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Contents


3.1 EPS Bearer Services and E-UTRA Radio Bearers

3.2 E-UTRA Radio Bearers


Contents

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Contents


3.1 EPS Bearer Services and E-UTRA Radio Bearers

3.2 E-UTRA Radio Bearers


QoS in Packet Switched Networks

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QoS in Packet Switched Networks


LTE Bearers

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LTE Bearers


GT#".ased"Tra!s+rt"

#M$#"is"diere!t

Service Data Flows

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Service Data Flows

SD"Ser*i%e"

Data"'


Default and Dedicated EPS

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Bearers


EPS QoS Parameters

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EPS QoS Parameters

GBR QoS Information

AMBR (Aggregate Maximum Bit Rate)

QoS Class Indicator


GBR QoS Information

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GBR QoS Information

E-RAB Maximum Downlink Bit Rate.

E-RAB Maximum Uplink Bit Rate.

E-RAB Guaranteed Downlink Bit Rate.

-


.

Page71

Aggregate Maximum Bit Rate

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gg egate a u t ate

UE AMBR (User Equipment Aggregate Maximum Bit Rate)

APN AMBR (Access Point Name Aggregate Maximum Bit

Rate)


QoS Class Indicator

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Q

QC$ %ype !riority !a"ketDelay&u#get 'ms(

!a"ketError Rate

Example Ser)i"e

1 GBR 2 100 10-2

Conversational Voice

2 GBR 4 150 10-3 Conversational Video

3 GBR 3 50 10-3

Real Time Gaming

4 GBR 5 300 10-6

Non-Conversational Voice

-


5 Non-GBR 1 100 10-

IMS Signaling

6 Non-GBR 6 300 10-6

Video, TCP Based

7 Non-GBR 7 100 10-3

Voice, Video, Interactive

Gaming

8 Non-GBR 8 300 10-6

Video, TCP Based

9 Non-GBR 9 300 10-6

Video, TCP Based

Allocation and Retention Priority

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y

Priority Level (0 to 15)

Pre-emption Capability

Pre-emption Vulnerability


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Signaling Radio Bearers

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g g

SRB0

SRB1

SRB2


Data Radio Bearers

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E#S".earer"

$de!tit)"0"t"15

Radio Bearer QoS

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E-A."$D

E-A."(e*e'"S"#araeters

Tra!s+rt"(a)er"Address

GT#-TE$D

NAS-#DU


Uu S1-U S5/S8 SGi

S."2

S."1

Deau't"E#S".earer"E#S".earer"$de!tit)"7"5D."1

E-UTRA Configuration

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E-UTRA Configuration Cont.

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Various parameters can influence the performance, these include:

PDCP Compression.

RLC AM or UM.

RLC AM Polling Configuration.

Uplink MAC Priority.


Uplink MAC Prioritized Bit Rate.

Uplink MAC Bucket Size Duration.

HARQ Configuration and re-transmissions.

BSR (Buffer Status Report) Configuration.

SPS (Semi Persistent Scheduling) Configuration.

Physical Channel and Power Configuration.

Page80

Questions

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The EPS Bearer typically is identified between the UE and

which other entity?

a. eNB.


c. S-GW.

d. PDN-GW.

Questions

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What is used in the PDN-GW and the UE to map IP

datagrams to the correct EPS bearer?


Questions

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How many EPS bearers can a UE have?

a. 5.

b. 6.


. .

d. 8.

e. 9.

Questions

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Which QCI value is linked to IMS signaling?


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Contents

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4. Radio Resource Control

4.1 The RRC Layer

4.2 RRC Structure

4.3 RRC States


4.4 RRC Services

Contents

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4.1 The RRC Layer

4.2 RRC Structure

4.3 RRC States


4.4 RRC Services

RRC Interaction with Lower Layers

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C"

C!tr'


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Services Expected From Lower

L

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LayersThe main services that RRC expects from lower layersinclude:

PDCP - integrity protection and ciphering.

RLC - a reliable and in-sequence transfer of information,


without introducing duplicates and with support for

segmentation and concatenation.

Page90

Contents

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4.1 The RRC Layer

4.2 RRC Structure

4.3 RRC States


4.4 RRC Services

eNB Structure

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e'a)"EMM"a!d"

ESM"Si!a'i! e'a)"$#"Dataras

E#S".earers


(CMAC

#)si%a'

Contents

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4.1 The RRC Layer

4.2 RRC Structure

4.3 RRC States


4.4 RRC Services

RRC States

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Functions

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Broadcast of SI (System Information):

Including NAS common information.

Information applicable for UEs in RRC Idle mode.

Including ETWS (Earthquake and Tsunami Warning System) notification.


Functions Cont.

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RRC Connection control:

Paging.

Establishment/modification/release of RRC connection.

Initial security activation.


connec on mo y

Establishment/modification/release of RBs

Radio configuration control

QoS control

Recovery from Radio Link failure.

Page96

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Mobility Procedures between

E-UTRA and CDMA2000

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E-UTRA and CDMA2000

,a!d*er

C!!e%ti!"

Estab'ise!t/

1xTT"CS"A%ti*e E-UTA

C"C!!e%ted ,#D"A%ti*e

,a!d*er


e'ease

1xTT"Dra!t E-UTA

C"$d'e ,#D"$d'e

ese'e%ti! ese'e%ti!

Contents

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4.1 The RRC Layer

4.2 RRC Structure

4.3 RRC States


4.4 RRC Services

MIB and SIB1 Parameters

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.a!didt

#,$C,

SN


LTE SIBs SIB2

Access Class Information

Radio Resource Configuration Common

UE-Timers And Constants

Uplink Frequency InformationMBF! Configuration Information

Ti Ali t Ti C

SIB5

Inter Frequency Carrier Freq 'ist

Inter Frequency Carrier Freq Info

Inter Frequency !eig&*our Cell 'ist

Inter Frequency !eig&*our Cell InfoInter Frequency Black Cell 'ist

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Time Alignment Timer Common

SIB3

Cell Reselection Information

"-#yst

peed tate Reselection $arameters

Cell Reselection er%ing Freq Info-!on-Intra earc& Info

T&res&old er%ing 'o( )alue

Cell Reselection $riority

Intra Fre Cell Reselection Info

SIB6

Carrier Frequency 'ist UTRA +F,,T,,.

t-Reselection UTRA

SIB7

t-Reselection /ERA!Carrier Frequency Info 'ist

SIB8

C,MA0111 Reselection Information


q-R2'e%Min

p-Ma2

s-Intraearc&

Allo(ed Measurement Band(idt&

$resence Antenna $ort 3

!eig&*or Cell Config

t-ReselectionEUTRA

t-ReselectionEUTRA-F

SIB4

Intra Freq !eig&*our Cell 'ist$&ysical Cell I,

q-4ffsetCell

Intra Freq Black Cell 'ist

C/ $&ysical Cell Id Range

SIB9

#ome e!B !ame

SIB10

ET5 $rimary !otification

SIB11

ET5 econdary !otification

RRC Paging

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#ai!"e%rd"(ist

- UE"$de!tit)"S-TMS$"r"$MS$

- CN"Dai!

S)ste"$!"Mdii%ati!

ET&S"$!di%ati!


RRC Connection

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RRC Connection Reject

On reception of a RRC Connection Reject:

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On reception of a RRC Connection Reject:

Stop timer T300 (Stops on reception of RRC Connection Setup or RRC

Connection Reject message).

Reset MAC and release the MAC configuration.

Start timer T302, with the timer value set to the “Wait Time”.


Inform upper layers about the failure to establish the RRC connection and that

access barring for mobile originating calls, mobile originating signalling and

mobile terminating access is applicable, upon which the procedure ends;UE

utilizes the T302 timer.

Initial Security Activation

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" "


" "

RRC Connection Reconfiguration

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Measuree!t"C!iurati!"Mbi'it)"C!tr'"$!rati!"

Dedi%ated"$!"NAS

adi"esur%e"C!i"Dedi%ated"C"C!!e%ti!"e%!iurati!"


" " " "

- srb-TAddMd(ist

- drb-TAddMd(ist

- drb-Te'ease(ist

- MAC"Mai!"C!i

- S#S"C!i

- #)si%a'"C!i"Dedi%ated

Se%urit)"C!iurati!",:

e9ues

C"C!!e%ti!"e%!iurati!"C+'ete

C"C!!e%ti!"e-estab'ise!t

Counter Check

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RRC Connection Re-establishment

The UE initiates the procedure when AS security has been

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The UE initiates the procedure when AS security has been

activated and one of the following conditions is met:

Upon detecting RLF (Radio Link Failure).

Upon handover failure.


Upon mobility from E-UTRA failure.Upon integrity check failure indication from lower layers.

Upon an RRC Connection Reconfiguration failure.

Page109

RRC Connection Re-establishment

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RRC Connetion Release

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Information Transfer

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Measurement Configuration

Intra-frequency measurements: measurements at the

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q y

downlink carrier frequency of the serving cell.

Inter-frequency measurements: measurements at

frequencies that differ from the downlink carrier frequency of


the serving cell.

Inter-RAT measurements of UTRA frequencies.

Inter-RAT measurements of GERAN frequencies.

Inter-RAT measurements of CDMA2000 HRPD or

CDMA2000 1xRTT frequencies.

Page114

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Measurement Objects

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Measuree!t"C!iurati!"

- eas:b;e%tTAddMd(ist

-- eas:b;e%t$d

-- eas:b;e%t"eas:b;e%tEUTA"

--- %arrierre9"C"C!!e%ti!"e%!iurati!"


"

--- a''edMeas.a!didt

--- +rese!%eA!te!!a#rt1

--- !eiCe''C!i--- setre9"

--- %e''sTAddMd(ist

---- %e''$!dex"

---- +)sCe''$d

---- %e''$!di*idua':set

e9ues

C"C!!e%ti!"e%!iurati!"

C+'ete

Report Configuration

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Measuree!t"C!iurati!"

- re+rtC!iTAddMd(ist

-- re+rtC!i$d-- re+rtC!i"re+rtC!iEUTA

--- trierT)+e"e*e!tC"C!!e%ti!"e%!iurati!"

Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.Page117

---- e*e!t$d"e

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#eridi%a'"

e+rti!e+rt"$!ter*a'"s120="s240="s480="s640="

s1024="s2048="s5120="s10240=

i!1="i!6="i!12="i!30="i!60

Measurement Based Triggering

Events Event A1 - serving cell becomes better than the threshold.

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Event A2 - serving cell becomes worse than the threshold.

Event A3 - neighbor cell becomes (including offset) better than the

serving cell.

-


.

Event A5 - serving cell becomes worse than Thresh1 (Threshold1) and

the neighbor cell becomes better than Thresh2 (Threshold2).

Event B1 - Inter RAT neighbor cell becomes better than threshold.

Event B2 - serving cell becomes worse than threshold1 and inter RAT

neighbor cell becomes better than threshold2.

Page119

Event Based Trigger (Event A3)

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Event A3 Example

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Event A3 TTT Timer

Entering condition:

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Mn+ Ofn + Ocn− Hys > Ms + Ofs + Ocs + Off

Leaving condition:


Cell Selection

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rx'e*eas"

rx'e*eas"


rx'e*eas"

Cell Reselection

Intra-frequency Measurements

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If Squal > Sintrasearch - the UE may choose not to perform

intra-frequency measurements.

If Squal

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Medium-mobility state criteria - this is met if the number of

cell reselections during time period TCRmax exceeds NCR_M

and does not exceed NCR_H.


High-mobility state criteria - this is met if the number of cell

reselections during time period TCRmax exceeds NCR_H.

Ranking of Cells

Page125

Questions

What are the two main RRC states?

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Questions

True/False. LTE uses substates like Cell_PCH and

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Cell_FACH?


Questions

Which message is used to trigger LTE intra system

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handovers?

a. System Information.

nn i n


c. RRC Connection Reconfiguration. d. Measurement Control.

Questions

Which event indicates that a neighboring cell is better than a

i ll b ff ?

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serving cell by an offset?

a. Event A1.

v n


c. Event A3. d. Event A4.

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Contents

1. EPS Architecture

2 EPS P l

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2. EPS Protocols



.




8. Mobility in LTE

Contents


5 1 PDCP Operation

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5.1 PDCP Operation


PDCP Functions

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Control Plane PDCP Data PDU forSRB

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Data Plane PDCP Data PDU forDRB (Long PDCP SN)

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Data Plane PDCP Data PDU forDRB (Short PDCP SN)

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PDCP Control PDU - Status Report

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000


PDCP Control PDU - FeedbackReport

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001


PDCP ROHC

Initialization and Refresh

First - Order

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First Order

Second - Order


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Count Value

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PDCP Ciphering

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Questions

True / False. PDCP is involved in NAS Ciphering.

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Questions

What size PDCP Sequence Number supports UM and AM

RLC Modes?

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a. 5bits.

i


c. 12bits.

d. 14bits.

Questions

True / False. EEA0, EEA1 and EEA2 encrypt information in

the air interface?

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Questions

What term is used to identify IP header compression in LTE?

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Contents

1. EPS Architecture

2. EPS Protocols

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.




8. Mobility in LTE

Contents


6.1 RLC Functions

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6.2 RLC Modes and Formatting

6.3 MAC Functions


6.4 MAC Architecture

6.5 MAC Formatting

Contents


6.1 RLC Functions

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6.3 MAC Functions



6.5 MAC Formatting

Services Provided to Upper Layers

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Services Expected from LowerLayers Data transfer.

Notification of a transmission opportunity, together with the

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total size of the RLC PDU (Protocol Data Units) to betransmitted in the transmission opportunity.


Functions of the RLC Sublayer

Transfer of upper layer PDUs.

Error correction through ARQ.

Concatenation segmentation and reassembly of RLC SDU (Service Data

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Concatenation, segmentation and reassembly of RLC SDU (Service Data

Units).

-


.

Reordering of RLC data PDUs.

Duplicate detection.

RLC SDU discard.

RLC re-establishment.

Protocol error detection.

Page154

Contents


6.1 RLC Functions

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6.3 MAC Functions



6.5 MAC Formatting

Transparent Mode RLC

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Unacknowledged Mode RLC

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Acknowledged Mode Functions

Segmentation and reassembly.

Concatenation.

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Error correction.

-


.

Duplicate detection.

Page158

Acknowledged Mode RLC

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RLC PDU Formats

Data %ransfer Mo#e !DU Name

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Transparent TMD

Unacknowledged UMD


Acknowledged AMD

AMD Segment

Status

RLC UMD 5bit SN

5bit"SN

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FI Field Interpretation

+alue Des"ription

00 First byte of the Data field corresponds to the first byte of a RLC SDU.

Last byte of the Data field corresponds to the last byte of a RLC SDU.

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01 First byte of the Data field corresponds to the first byte of a RLC SDU.

Last byte of the Data field does not correspond to the last byte of a RLC SDU.


10 First byte of the Data field does not correspond to the first byte of a RLC SDU.

Last byte of the Data field corresponds to the last byte of a RLC SDU.

11 First byte of the Data field does not correspond to the first byte of a RLC SDU.

Last byte of the Data field does not correspond to the last byte of a RLC SDU.

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RLC AMD with Odd Number ofLength Indicators

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RLC AMD PDU Segment

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AMD Segmentation

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RLC Timers

t-PollRetransmit

t-Reordering

S P hibi

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t-StatusProhibit


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Contents


6.1 RLC Functions


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6.3 MAC Functions



6.5 MAC Formatting

MAC Services

Mapping

Multiplexing

HARQ (H brid A tomatic Repeat Req est)

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HARQ (Hybrid Automatic Repeat Request)


Formatting

Page173

Services Expected from thePhysical Layer Data transfer services.

Signaling of HARQ feedback.

Signaling of Scheduling Request

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Signaling of Scheduling Request.


, . . .

Page174

Contents


6.1 RLC Functions


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6.3 MAC Functions



6.5 MAC Formatting

MAC Architecture

(i%a'"Ca!!e'"#riritiati!"U("

:!')

#CC, .CC, CCC, DCC, DTC, MAC"C!tr'

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:!')


a!d"A%%ess"

C!tr'

De-"Mu'ti+'exi!C!tr'

,A

#C, .C, D(-SC, AC,U(-SC,

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MAC PDU for DL-SCH and UL-SCH

:%t"1 E

:%t"2(

(C$D

:%t 3

1"t"i!di%ate"a!ter"

set""//E/(C$D

rat .it

(i%a'"Ca!!e'"

$de!tit)

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Data

:%t"3

:%t"4rat".it"

07Bbits


:%t"N

Data

:%t"1

:%t"N

E

:%t"2(

(C$D

:%t"3

:%t"4

(rat".it"

1715bits

LCID Coding for DL-SCH

,C$D $n#ex Des"ription

00000 CCCH

00001-01010 Identity of the logical channel

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01011-11011 Reserved


11100 UE Contention Resolution Identity

11101 Timing Advance Command

11110 DRX Command

11111 Padding

LCID Coding for UL-SCH

,C$D $n#ex Des"ription

00000 CCCH

00001-01010 Identity of the logical channel

01011-11001 Reserved

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11010 Power Headroom Report


11011 C-RNTI

11100 Truncated BSR

11101 Short BSR

11110 Long BSR

11111 Padding

MAC Subheaders

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Timing Advance Parameter

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Buffer Status Report

Short BSR and Truncated BSR format

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Long BSR format

Page183

Power Control Headroom

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#AC,"#reab'e"Se9ue!%e

AC,

Random Access Process

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MAC"S%edu'i!"Gra!t


C"C!!e%ti!"e9uestU(-SC,

C"C!!e%ti!"Setu+

C"C!!e%ti!"Setu+"C+'eteU(-SC,

D(-SC,

Si!a''i!"adi".earer

C"C!!e%ted

Page186

Random Access Response

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Uplink Grant

!arameter Si.e'bits(

Des"ription

Hopping Flag 1 Indicates whether the allocation should be using uplink hopping.

Fixed Size Resource Block Assignment 10 The assigned uplink resources.

Truncated Modulation and Coding Scheme 4 Indication of modulation and coding scheme to use.

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-


, . . .

UL Delay 1 Indicates whether uplink assignment is delayed until the next

subframe, e.g. K+4+1.

CQI Request 1 Indicates whether the UE has been requested to multiplex the

CQI (Channel Quality Indicator) into the scheduled PUSCH

transmission.

Backoff Indicator

Sub",eader"A

.$ :%t"1E T

Sub ,eader .A#$D"r".$

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Sub",eader".

" "


MAC"A".

MAC"A"!

" ".a%?"$!di%atr

0"- 60s

Questions

True / False. RLC is able to provide an ARQ mechanism?

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Questions

What two sizes of RLC sequence number are used for RLC

UM?

a. 5bits.

i

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i


c. 10bits.

d. 12bits.

Questions

True / False. The AMD PDU segment is also available in

Release 8 HSPA+ systems?

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Questions

Which parameter is used by MAC for logical channel

mapping?

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Questions

How many LCID values are available for EPS bearers?

a. 4.

b. 8.

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. .

d. 12.

Contents

1. EPS Architecture

2. EPS Protocols


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.




8. Mobility in LTE

Contents


7.1 X2AP Functions and Procedures

7.2 S1AP Functions and Procedures

7.3 User Plane GTP Functions and Procedures

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Contents





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X2AP Functions and Procedures

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Mapping between X2AP Functionsand X2AP EPs

/un"tion Elementary !ro"e#ure's(

Mobility Management a) Handover Preparation.

b) SN Status Transfer.

c) UE Context Release.

d) Handover Cancel.

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Load Management a) Load Indication.

b) Resource Status Reporting Initiation.

c) Resource Status Reporting.

Reporting of General Error Situations Error Indication.

Resetting the X2 Reset.

Setting up the X2 X2 Setup.

eNB Configuration Update eNB Configuration Update.

X2 Elementary Procedures (Class1)

Elementary !ro"e#ure $nitiatingMessage

Su""essful 0ut"ome Unsu""essful 0ut"ome

Response message Response message

Handover Preparation HANDOVER

REQUEST

HANDOVER REQUEST

ACKNOWLEDGE

HANDOVER PREPARATION

FAILURE

Reset RESET REQUEST RESET RESPONSE

X2 Setup X2 SETUP X2 SETUP RESPONSE X2 SETUP FAILURE

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eNB Configuration Update ENB

CONFIGURATIO

N UPDATE

ENB CONFIGURATION UPDATE

ACKNOWLEDGE

ENB CONFIGURATION UPDATE

FAILURE

Resource Status Reporting

Initiation

RESOURCE

STATUS

REQUEST

RESOURCE STATUS RESPONSE RESOURCE STATUS FAILURE

X2 Elementary Procedures (Class2)

Elementary !ro"e#ure $nitiating Message

Load Indication LOAD INFORMATION

Handover Cancel HANDOVER CANCEL

SN Status Transfer SN STATUS TRANSFER

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UE Context Release UE CONTEXT RELEASE

Resource Status Reporting RESOURCE STATUS UPDATE

Error Indication ERROR INDICATION

Message Formatting

Presence

Range

Criticality

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Basic Mobility Procedures -Handover Preparation

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,a!d*er"e9uest

,a!d*er"e9uest"A%?!'ede

Sur%e Taret

X2 Handover Preparation Failure

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X2 SN Status Transfer

:'d"eN."UE"X2A#"$D"

Ne"eN."UE"X2A#"$D

E-A.s"Sub;e%t"T"Status"Tra!ser"(ist

- E-A."$D- e%ei*e"Status":"U("#DC#"SDUs":

- U( C:UNT >a'ue

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SN"Status"Tra!ser

U("C:UNT">a'ue

- D("C:UNT">a'ue

Sur%e Taret

X2 UE Context Release

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X2 Handover Cancel

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X2 Load Indication

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X2 Uplink Interference

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Downlink RNTP

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X2 Resource Status Request

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X2 Resource Status Update

esur%e"Status"U+date

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eN.1"Measuree!t"$D

eN.2"Measuree!t"$D

Ce''"Measuree!t"esu't- ECG$

- ,ardare"(ad"$!di%atr

- S1"TN("(ad"$!di%atr

- adi"esur%e"Status

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eNB Configuration Update

Ser*ed"Ce''s"T"Add

Ser*ed"Ce''s"T"Mdi)

Ser*ed"Ce''s"T"De'ete

GU"Gru+"$d"T"Add"(ist

GU"Gru+"$d"T"De'ete"(ist

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Contents





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S1 Control and User Plane

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S1AP Elementary Procedures (Class1)

Elementary !ro"e#ure $nitiating Message Su""essful 0ut"ome Unsu""essful 0ut"ome

Response message Response message

Handover Preparation HANDOVER REQUIRED HANDOVER COMMAND HANDOVER PREPARATION FAILURE

Handover Resource Allocation HANDOVER REQUEST HANDOVER REQUEST ACKNOWLEDGE HANDOVER FAILURE

Path Switch Request PATH SWITCH REQUEST PATH SWITCH REQUEST ACKNOWLEDGE PATH SWITCH REQUEST FAILURE

Handover Cancellation HANDOVER CANCEL HANDOVER CANCEL ACKNOWLEDGE

E-RAB Setup E-RAB SETUP REQUEST E-RAB SETUP RESPONSE

E-RAB Modify E-RAB MODIFY REQUEST E-RAB MODIFY RESPONSE

- e ease - -

Initial Context Setup INITIAL CONTEXT SETUP REQUEST INITIAL CONTEXT SETUP RESPONSE INITIAL CONTEXT SETUP FAILURE

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Reset RESET RESET ACKNOWLEDGE

S1 Setup S1 SETUP REQUEST S1 SETUP RESPONSE S1 SETUP FAILURE

UE Context Release UE CONTEXT RELEASE COMMAND UE CONTEXT RELEASE COMPLETE

UE Context Modification UE CONTEXT MODIFICATION REQUEST UE CONTEXT MODIFICATION RESPONSE UE CONTEXT MODIFICATION FAILURE

eNB Configuration Update ENB CONFIGURATION UPDATE ENB CONFIGURATION UPDATE ACKNOWLEDGE ENB CONFIGURATION UPDATE FAILURE

MME Configuration Update MME CONFIGURATION UPDATE MME CONFIGURATION UPDATE ACKNOWLEDGE MME CONFIGURATION UPDATE FAILURE

Write-Replace Warning WRITE-REPLACE WARNING REQUEST WRITE-REPLACE WARNING RESPONSE

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S1 Setup Request

G'ba'"eN."$D

eN."Nae":"

Su++rted"TAs

- TAC

.rad%ast"#(MNs- #(MN"$de!tit)

CSG"$d"(ist":

- CSG $d

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- CSG"$d

Deau't"#ai!"DX

S1 Setup Response

MME"Nae":

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Ser*ed"GUMME$s

- Ser*ed"#(MNs-- #(MN"$de!tit)

- Ser*ed"Gru+$Ds

-- MME"Gru+"$D

- Ser*ed"MMECs

-- MME"Cde

e'ati*e"MME"Ca+a%it)Criti%a'it)"Dia!sti%s":

S1 Initial UE Message

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Downlink and Uplink NAS Transport

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S1 Initial Context Setup RequestMME"UE"S1A#"$D"

eN."UE"S1A#"$D"UE"Areate"Maxiu".it"ate

E-A."t".e"Setu+"(ist"

- E-A."$D

- E-A."(e*e'"S"#araeters

- Tra!s+rt"(a)er"Address

- GT#-TE$D

- NAS-#DU":

UE"Se%urit)"Ca+abi'itiesSe%urit)"@e)

" "" "

,a!d*er"estri%ti!"(ist":

UE"adi"Ca+abi'it)":

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$!itia'"C!text"Setu+"e9uest

Subs%riber"#ri'e"$D"r"AT/re9ue!%)"#ririt)":

CS"a''ba%?"$!di%atr":

S>CC":+erati!"#ssib'e":

$!itia'"C!text"Setu+"es+!se

Create"

Sessi!"

GT#*2-C

E-A."$D"7"5 S-G&"Address"

a!d"TE$D

S1 Initial Context Setup Response

MME"UE"S1A#"$D"

eN."UE"S1A#"$D"

E-A."Setu+"(ist"

- E-A."$D


- GT#-TE$D

" " " " "- " " " " "

Criti%a'it)"Dia!sti%s":

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$!itia'"C!text"Setu+"e9uest

$!itia'"C!text"Setu+"es+!se

Mdi)"

.earer"

S-G&"Address"

a!d"TE$D

eN."Address"a!d"

TE$D E-A."$D"7"5

S1 E-RAB Setup Request

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S1 E-RAB Setup Response

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E-RAB Release Indication

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Requirement for S1 HandoverProcedure

S11

S11

--S1-MME

S1-U

S1-U

S1-U

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S1 U

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S1 Handover Command

,a!d*er"Ca!d

MME"UE"S1A#"$D

" " "

Sur%e

" " "

,a!d*er"T)+e

NAS"Se%urit)"#araeters"r"E-UTAN"Ci"t"UTAN"GEAN

E A.s Sub;e%t t rardi! (ist :

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E-A.s"Sub;e%t"t"rardi!"(ist":

- E-A."$D

- D("Tra!s+rt"(a)er"Address":- D("GT#-TE$D":

- U("Tra!s+rt"(a)er"Address":

- U("GT#-TE$D":

E-A.s"t"e'ease"(ist":

Taret"t"Sur%e"Tra!s+are!t"C!tai!er

Taret"t"Sur%e"Tra!s+are!t"C!tai!er"Se%!dar)":Criti%a'it)"Dia!sti%s":

S1 Handover Request

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S1 Handover RequestAcknowledge

MME"UE"S1A#"$D"eN."UE"S1A#"$D

E-A.s"Aditted"(ist"

- E-A."$D


- GT#-TE$D- D("Tra!s rt"(a er"Address" :

" " " "

- D("GT#-TE$D":

- U("Tra!s+rt"(a)er"Address":

U( GT# TE$D :

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,a!d*er"e9uest

- U("GT#-TE$D":

E-A.s"ai'ed"t"Setu+"(ist":Taret"t"Sur%e"Tra!s+are!t"C!tai!er

Criti%a'it)"Dia!sti%s":Taret

,a!d*er"e9uest"A%?!'ede

S1 Handover Notify

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S1 Path Switch Request

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S1 Path Switch Acknowledge

Taret Sur%e

rardi!

#at"Sit%"e9uest"A%?!'ede

MME"UE"S1A#"$D

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eN."UE"S1A#"$D

UE"Areate"Maxiu".it"ate":E-A."T".e"Sit%ed"i!"U+'i!?"(ist":

- E-A."$D"


- GT#-TE$D

E-A."T".e"e'eased"(ist":

Se%urit)"C!text

Criti%a'it)"Dia!sti%s":

Handover Cancel

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S1 UE Context Release

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S1 UE Context Release Request

MME"UE"S1A#"$D

eN."UE"S1A#"$DCause"

UE"C!text"e'ease"e9uest

"

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S1 Reset

Cause"

eset"T)+e

- S1"$!tera%e

-- eset"A''- " " "

eset

" " "

-- UE-Ass%iated"(i%a'"S1"C!!e%ti!"(ist"

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eset"A%?!'ede

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Location Reporting Control

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Overload Start

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Contents

7. X2/S1 Interface and Protocols7.1 X2AP Functions and Procedures



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GTP Tunnels

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GTPv1-U Header

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Extension Header

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GTPv1-U Procedures

Message %ype +alue Message

1 Echo Request

2 Echo Response

3-25 Reserved

26 Error Indication

27-30 Reserved

31 Supported Extension Headers Notification

32-253 Reserved

254 End Marker

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254 End Marker

255 G-PDU

GTPv1 Echo Procedure

E%"e9uest

#ri*ate"Exte!si!":

""

e%*er)≥ 60s

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#ri*ate"Exte!si!":E%"e9uest

E%"es+!se

Supported Extension HeadersNotification

$!%'udi!"Exte!si!",eader

G-#DU

Su++rted"Exte!si!",eaders"Ntii%ati!

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Exte!si!"!t"su++rted

GTPv1 End Marker

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Questions

True / False. LTE can work without an X2 interface?

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Questions

What is the name of the protocol which is used to reliablytransport X2AP and S1AP signaling?

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Questions

How are S1AP messages for a UE correlated?

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Questions

After a mobile establishes an RRC connection, what is thefirst message send from the eNB across the S1-MME

interface?

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Questions

What message is used by a target eNB to inform the MMEof a successful X2 handover?

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Questions

What version of GTP is used in the E-UTRAN?

a. GTPv1-C.

b. GTPv1-U.

. - .

d. GTPv2-U.

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Contents

1. EPS Architecture

2. EPS Protocols


.


6 Radio Link Control and Medium Access Control

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8. Mobility in LTE

Contents

8. Mobility in LTE

8.1 X2 Handover

8.2 S1 Handover

8.3 Inter RAT Handover

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Contents

8. Mobility in LTE

8.1 X2 Handover

8.2 S1 Handover


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Handover Phases

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X2 Based Handover with LosslessPDCP

Sur%e Taret

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Sur%e Taret

X2 Based Handover with LosslessPDCP

C"C!!e%ti!"e%!iurati!"" "

a!d"A%%ess"es+!se

+ ete #at"Sit%"

e9uest Mdi)".earer"

e9uest

Mdi)".earer"

es+!se#at"Sit%

#DC#"Status"e+rt

#DC#"Status"e+rt

UE C

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es+ seat S t%e9uest"A%?

E!d"Mar?er

GT#-U"Messae

E!d"Mar?er

GT#-U"Messae

UE"C!text"

e'ease

Mobility Control Information

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X2AP SN Status Transfer

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Contents

8. Mobility in LTE

8.1 X2 Handover

8.2 S1 Handover


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Inter MME and S-GW HandoverPreparation Phase

,a!d*er"e9uiredrard"

e'%ati!"e9uest

Create

Sessi!

e9uest

CreateS i

,a!d*er"e9uest

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Sessi!

es+!se

9

,a!d*er"e9uest"A%?

Page267

Create"$!dire%t"Data"" "

Inter MME and S-GW HandoverPreparation Phase

" "

e9uest

Create"$!dire%t"

Data"rardi!"

Tu!!e'"es+!se

rard"e'%ati!"

es+!se

Create $!dire%t Data

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Create"$!dire%t"Data"

rardi!"Tu!!e'"

e9uest

Create"$!dire%t"

Data"rardi!"Tu!!e'"es+!se

Page268

Inter MME and S-GW HandoverExecution Phase

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Inter MME and S-GW HandoverExecution Phase

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Tracking Area Update and ClearingResources

Tra%?i!"Area"U+date"#r%edure

De'ete"

De'ete"$!dire%t"Data"

di T '

"

Sessi!"

e9uest

De'ete"

Sessi!"es+!se

UE"C!text"e'ease"

Ca!d

UE"C!text"e'ease"

C+'ete

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rardi!"Tu!!e'"

es+!se

rardi!"Tu!!e'"

e9uest


rardi!"Tu!!e'"es+!se


rardi!"Tu!!e'"e9uest

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E-UTRAN to UTRAN Handover

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E-UTRAN to UTRAN Handover(cont.)

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Questions

True / False. LTE is able to be configured to perform

Lossless Intra-LTE handovers?

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Questions

What is the name given to the last GTP-U message sent

from S-GW to the source (old) eNB after completion?

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Questions

True / False. It is possible to handover from one eNB to

another even if the X2 interface is not present.

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Questions

Which entity makes the decision for handovers?

a. MME.

b. S-GW.

. .

d. eNB.

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Thank you. .

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Documents

dach.pdf