OEA000200 LTE Protocols and Procedures ISSUE 1.01

7/22/2019 OEA000200 LTE Protocols and Procedures ISSUE 1.01

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

LTE Protocols andProcedures


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Copyright 2010 Huawei Technologies Co., Ltd. All rights reserved. Page2

Contents

1. EPS Architecture

2. EPS Protocols

3. LTE/SAE Quality of Service

4. Radio Resource Control

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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Contents

1. EPS Architecture

2. EPS Protocols






8. Mobility in LTE


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Contents

1. EPS Architecture

1.1 EPS Network Elements

1.2 EPS Interfaces


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Contents

1. EPS Architecture


1.2 EPS Interfaces


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E-UTRAN Architecture

Page6

UE eNB

E-UTRAN

eNB

EPC

S-GW

MME

PDN-GW

IMS

HSS Video ASCSCF


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UE

EPS Mobility & EPS

Session Management

IP Adaptation

FunctionRadio Resource

Control

Plane

User

Plane

User Equipment

Page7

EPS Mobility Management

Registration

Tracking Area Update

Handover

EPS Session M anagementBearer Activation

Bearer Modification

Bearer Deactivation

Radio Resource

RRC, PDCP, RLC, MAC &

PHY Layer Protocols


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UE Categories

Page8

UE Category MaximumDownlinkData Rate

Number ofDownlinkData Streams

MaximumUplink DataRate

Support forUplink64QAM

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)

S-TMSI (Serving - Temporary Mobile Subscriber Identity)

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

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Evolved Node B

Page10

Packet

Classification

and QoS Policy

Enforecment

Radio Resource

Management

Routing

DataCompression

Data Protection

eNB


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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 the

3GPP for femto cell operation. These are:

CSG (Closed Subscriber Group) Identity.

HeNB.

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Mobility Management Entity

Page13

Authentication

NAS Signaling

and Security

S-GW and

PDN-GW

Selection

Tracking Area List

Management and

Paging

Inter MME

Mobility

MME


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Serving - Gateway

Page14

GTP/PMIP

SupportMobility Anchor

Downlink

Packet

Buffering

Packet Routing

and Forwarding

Lawful

Interception

S-GW


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Packet Data Network - Gateway

Page15

Packet Filtering

LawfulInterception

IP Address

Allocation

Transport

Level Packet

Marking

Accounting

PDN-GW


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Contents

1. EPS Architecture


1.2 EPS Interfaces


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E-UTRAN Interfaces

Page17

E-UTRAN

X2

Uu

eNB

eNB

EPC

S-GW

MME

S1-MME

S1-MMES1-U

S1-U


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EPC Architecture and Interfaces

Page18

EPC

S1-MME

S1-U

S11

S5/S8

S-GW

SGi

PDN-GW

MMEMME

S10


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Additional Network Elements and

Interfaces

Page19

EPC

S11

S5/S8

S10

MME

MME

SGSN

RNC

PCRF

HSS

EIR

S6a

S101

S2a

Gx

ePDG

S2bS103

S12

S4

S3

S13

CDMA

2000

CDMA

2000

Trusted

Non 3GPP

IP Access

Untrusted

Non 3GPP

IP Access

PDN-GW

Wn

S-GW


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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 UEs NAS signaling?

a. eNB.

b. MME.

c. S-GW

d. PDN-GW.


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Questions

True / False. The S-GW uses DHCP to allocate the UE IP

address.


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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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Contents

1. EPS Architecture

2. EPS Protocols






8. Mobility in LTE


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Contents

2. EPS Protocols

2.1 EPS Signaling

2.2 EPS Protocols

2.3 E-UTRAN Channel Mapping


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Contents

2. EPS Protocols

2.1 EPS Signaling

2.2 EPS Protocols



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LTE Control Plane

UE

E-UTRAN EPC

S-GW

MME

PDN-GWeNB

Non Access

Stratum

Signaling

Access

Stratum

Signaling


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LTE User Plane

UE

E-UTRAN EPC

S-GW

MME

PDN-GWeNB

Non Access

Stratum IP

Datagrams

Access

Stratum

Transport


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Contents

2. EPS Protocols

2.1 EPS Signaling

2.2 EPS Protocols



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Uu Interface Protocols

RLC

MAC

PHY

PDCP

RRC

Control Plane eNBUE

Uu

EMM and ESM Non Access Stratum

Access Stratum

RLC

MAC

PHY

PDCP

IP


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NAS EMM and ESM ProceduresEMM Procedures ESM Procedures

Attach 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

GUTI Reallocation UE Requested PDN Disconnect

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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eNB

RLC

MAC

PHY

PDCP

RRC

NAS Signaling

System Information

PLMN and Cell SelectionAdmission Control

Security Management

Cell Reselection

Measurement Reports

Handovers and Mobility

NAS TransportRadio Resource Management

Page34

Radio Resource Control


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eNB

RLC

MAC

PHY

PDCP

RRC

NAS Signaling

Control Plane

Encryption

Integrity Checking

User PlaneIP Header Compression

Encryption

Sequencing and Duplicate Detection

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Packet Data Convergence Protocol


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Radio Link Control

eNB

RLC

MAC

PHY

PDCP

RRC

NAS Signaling

TM (Transparent Mode)

UM (Unacknowledged Mode)

AM (Acknowledged Mode)Segmentation and Re-assembly

Concatenation

Error Correction


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Medium Access Control

eNB

RLC

MAC

PHY

PDCP

RRC

NAS Signaling

Channel Mapping and MultiplexingError Correction - HARQ

QoS Based Scheduling


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Physical Layer

eNB

RLC

MAC

PHY

PDCP

RRC

NAS Signaling

Error Detection

FEC Encoding/Decoding

Rate Matching

Mapping of Physical Channels

Power WeightingModulation and Demodulation

Frequency and Time Synchronization

Radio Measurements

MIMO Processing

Transmit Diversity

Beamforming

RF Processing


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Physical Layer

eNB

RLC

MAC

PHY

PDCP

RRC

NAS Signaling

Error Detection

FEC Encoding/Decoding

Rate Matching

Mapping of Physical Channels

Power WeightingModulation and Demodulation

Frequency and Time Synchronization

Radio Measurements

MIMO Processing

Transmit Diversity

Beamforming

RF Processing


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X2 Interface

Page40

eNB eNB

X2

IP

Layer 2

Layer 1

SCTP

X2AP

Control Plane

IP

Layer 2

Layer 1

UDP

GTP-U

User Plane


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S1 Interface

Page41

eNB

IP

Layer 2

Layer 1

SCTP

S1APControl Plane

S1-MME

MME

IP

Layer 2

Layer 1

UDP

GTP-UUser Plane

eNB

S1-U

S-GW


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S11 Interface

Page42

IP

Layer 2

Layer 1

UDP

GTPv2-C

Control Plane

S11

MME S-GW


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IP

Layer 2

Layer 1

UDP

GTPv2-C

IP

Layer 2

Layer 1

UDP

GTP-U / PMIP

Control Plane User Plane

S5/S8

S-GW PDN-GW

S5/S8 Interface

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IP

Layer 2

Layer 1

UDP

GTPv2-C

Control Plane

S10

MME MME

S10 Interface

Page44


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IP

Layer 2

Layer 1

TCP / UDP

Applications

SGi

PDN-GW

SGi Interface

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Contents

2. EPS Protocols

2.1 EPS Signaling

2.2 EPS Protocols



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LTE Channels

LogicalChannels

TransportChannels

PhysicalChannels

RadioChannels


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Logical Channels

RLC

MAC

PHY

Logical

ChannelsTransport

Channels

Physical

Channels Radio

Channel


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Control Logical Channels

BCCH

eNBUE

PCH

System Information

Messages

Paging

Devices


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CCCH

eNBUE

CCCH

DCCH

DCCH

SRB 0

SRB 0

SRB 1

SRB 2

Low PriorityNAS Signaling

Page50

CCCH and DCCH Signaling


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Traffic Logical Channels

eNBUE

DTCHDRB

Carries AM or UM

RLC Traffic


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LTE Release 8 Transport Channels

BCH

eNBUE

PCH

DL-SCH

RACH

UL-SCH


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Downlink Physical Channels

PBCH (Physical Broadcast Channel)

PCFICH (Physical Control Format Indicator Channel)

PDCCH (Physical Downlink Control Channel)

PHICH (Physical Hybrid ARQ Indicator Channel)

PDSCH (Physical Downlink Shared Channel)


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Radio Channels

eNB

UE

Radio

Channel

FDDRadio

Channel

UE

TDD


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Downlink Channel Mapping

DL-SCH

Physical Layer

MAC Layer

RLC Layer

PDCP Layer

RRC Layer

Physical

Channels

Transport

Channels

Logical

Channels

PDSCHPDCCHPHICHPCFICHPBCH

BCH PCH

BCCH PCCH CCCH DCCH DTCH

TM TM TM UM/AM UM/AM

Ciphering

Integrity

Ciphering

ROHC

RRC

ESM EMM IPNAS Layer


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Uplink Channel Mapping

Physical Layer

MAC Layer

RLC Layer

PDCP Layer

RRC Layer

Physical

Channels

Transport

Channels

Logical

Channels

PUSCHPUCCHPRACH

RACH

CCCH

TM UM/AM UM/AM

Ciphering

Integrity

Ciphering

ROHC

RRC

ESM EMM IPNAS Layer

UL-SCH

DCCH DTCH


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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

True / False. The eNB is able to decode the NAS messages.


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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.


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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.


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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.


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Contents

1. EPS Architecture

2. EPS Protocols






8. Mobility in LTE


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Contents


3.1 EPS Bearer Services and E-UTRA Radio Bearers

3.2 E-UTRA Radio Bearers


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Contents





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QoS in Packet Switched Networks

Data Voice x10

UE

E-UTRAN

EPC

S-GW

MME

PDN-GWeNB

UE

Packet

Classifier

Packet

Scheduler

Voice

Data x2


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LTE Bearers

End to End Service

Uu S1-U S5/S8 SGi

UEeNB S-GW PDN-GW

EPS Bearer Service

GTP Based Transport

(PMIP is different)

EPS Radio Bearer EPS Access Bearer


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Service Data Flows

Uu S1-U S5/S8 SGi

UEeNB S-GW PDN-GW

EPS Bearer Service

SDF (Service

Data Flow)

Default and Dedicated EPS


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Default and Dedicated EPS

Bearers

UE PDN-GWDefault EPS Bearer

Dedicated EPS Bearer (Maximum of 7) TFTTFT

Each Dedicated EPS Bearers has an

associated TFT (Traffic Flow Template)


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EPS QoS Parameters

GBR QoS Information

AMBR (Aggregate Maximum Bit Rate)

QoS Class Indicator

ARP (Allocation and Retention Priority)

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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.

E-RAB Guaranteed Uplink Bit Rate.

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Aggregate Maximum Bit Rate

UE AMBR (User Equipment Aggregate Maximum Bit Rate)

APN AMBR (Access Point Name Aggregate Maximum Bit

Rate)

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QoS Class Indicator

QCI Type Priority Packet

DelayBudget (ms)

Packet

Error Rate

Example Service

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 10-6

IMS Signaling

6 Non-GBR 6 300 10-6

Video, TCP Based

7 Non-GBR 7 100 10-3

Voice, Video, InteractiveGaming

8 Non-GBR 8 300 10-6

Video, TCP Based

9 Non-GBR 9 300 10-6

Video, TCP Based


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Allocation and Retention Priority

Priority Level (0 to 15)

Pre-emption Capability

Pre-emption Vulnerability

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Contents





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Signaling Radio Bearers

SRB0

SRB1

SRB2

Uu S1-U S5/S8 SGi

UEeNB S-GW PDN-GW

SRB 2

SRB 1

RRC (High Priority)

NAS (Lower Priority)


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Data Radio Bearers

Uu S1-U S5/S8 SGi

UEeNB S-GW PDN-GW

SRB 2

SRB 1

Default EPS Bearer (EPS Bearer Identity = 5)DRB 1

EPS Bearer

Identity 0 to 15

DRB Identity

1 to 32

Logical

Channel

Identity

1

2

3

Logical Channel

Identity 1 to 10

for Radio Bearers

Q S


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Radio Bearer QoS

Uu S1-U S5/S8 SGi

UEeNB S-GW PDN-GW

SRB 2

SRB 1

Default EPS Bearer (EPS Bearer Identity = 5)

Logical

Channel

Identity

DRB 1

1

2

3

MME

E-RAB ID

E-RAB Level QoS Parameters

Transport Layer Address

GTP-TEID

NAS-PDU

E UTRA C fi i


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E-UTRA Configuration

UE

eNB

E-RAB ID

DRB ID

PDCP, RLC, MAC and PHY Configuration

E UTRA C fi ti C t


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E-UTRA Configuration Cont.

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.

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Q ti


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Questions

The EPS Bearer typically is identified between the UE and

which other entity?

a. eNB.

b. MME.

c. S-GW.

d. PDN-GW.

Q ti


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Questions

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

datagrams to the correct EPS bearer?

Q ti


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Questions

How many EPS bearers can a UE have?

a. 5.

b. 6.

c. 7.

d. 8.

e. 9.

Q ti


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Questions

Which QCI value is linked to IMS signaling?

C t t


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Contents

1. EPS Architecture

2. EPS Protocols






8. Mobility in LTE

C t t


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Contents

4. Radio Resource Control4.1 The RRC Layer

4.2 RRC Structure

4.3 RRC States4.4 RRC Services

C t t


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Contents


4.2 RRC Structure

4.3 RRC States4.4 RRC Services

RRC I t ti ith L L


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RRC Interaction with Lower Layers

RLC

MAC

Physical

PDCP

RRC

NAS

IPRRC

Control

Services Provided To Upper


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pp

Layers

The RRC protocol offers the following services to upper layers:

Broadcast of common control information.

Notification of UEs in RRC Idle mode.

Transfer of dedicated control information.

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Services Expected From Lower


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p

Layers

The 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.

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Contents


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Contents


4.2 RRC Structure

4.3 RRC States

4.4 RRC Services

eNB Structure


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eNB Structure

RLC

MAC

Physical

PDCP

RRC

Non Access Stratum

Access Stratum

Control Plane

RRM

Relay EMM and

ESM Signaling Relay IP Datagrams

PDCP

RLC

MAC

Physical

User Plane

EPS

Bearers

Contents


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Contents


4.2 RRC Structure

4.3 RRC States

4.4 RRC Services

RRC States


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RRC States

LTE Detached

LTE Active

RRC Connected

LTE Idle

RRC Idle

PLMN Selection

Broadcast of System Information

Cell Selection

RRC Connection (SRB)

RRC Context in eNB

UE Known in a Cell

Send and/or Receive Data to/from UE

Network Controlled Mobility

Measurement Control

UE Monitors Scheduling Control ChannelUE Reports Channel Quality

UE can send Feedback Information

DRX can be Configured

DRX configured by NAS

Broadcast of System Information

PagingCell Reselection Mobility

GUTI Allocated

Located in Tracking Area(s)

No RRC Context Stored in the eNB

Functions


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Functions

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.

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Functions Cont


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Functions Cont.

RRC Connection control:

Paging.

Establishment/modification/release of RRC connection.

Initial security activation.

RRC connection mobility

Establishment/modification/release of RBs

Radio configuration control

QoS control Recovery from Radio Link failure.

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Functions Cont


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Functions Cont.

Inter-RAT mobility including e.g. security activation, transfer of RRC

context information.

Measurement configuration and reporting:

Establishment/modification/release of measurements.

Setup and release of measurement gaps.

Measurement reporting.

Other functions including e.g. transfer of dedicated NAS information and

non-3GPP dedicated information, transfer of UE radio access capability

information, support for E-UTRAN sharing (multiple PLMN identities).

Generic protocol error handling.

Support of self-configuration and self-optimization.

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E UTRA RRC State Interaction


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E-UTRA RRC State Interaction

Connection

Establishment/Release

E-UTRARRC Connected

E-UTRARRC Idle

Handover

Reselection

Connection

Establishment/

Release

Reselection

Cell_DCH

Cell_FACH

Cell_PCH

URA_PCH

UTRA_Idle

Connection


Handover

CCO, Reselection

Reselection

CCO, Reselection

CCO with NACC

GSM Idle/GPRSPacket Idle

GPRS Packet

Transfer Mode

GSM Connected

Mobility Procedures between


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E-UTRA and CDMA2000

Handover

Connection


1xRTT CS Act ive

1xRTT Dormant

E-UTRA

RRC Connected

E-UTRA

RRC Idle

HRPD ActiveHandover

HRPD IdleReselection Reselection

Contents


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Contents


4.2 RRC Structure

4.3 RRC States

4.4 RRC Services

MIB and SIB1 Parameters


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MIB and SIB1 Parameters

MIB

eNB

SIB1

MIB

Bandwidth

PHICH

SFN

SIB1

PLMN Identity List

Tracking Area Code

Cell Identity

Cell Barred Indication

Intra Frequency ReselectionCSG Indication and Identity

Cell Selection Information

P-Max

Frequency Band Indicator

Scheduling Information List

TDD Configuration

SIB Window LengthSystem Info Value Tag

LTE SIBsSIB2

Access Class Information

SIB5

Inter Frequency Carrier Freq List


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LTE SIBs Radio Resource Configuration CommonUE-Timers And Constants

Uplink Frequency Information

MBSFN Configuration Information

Time Alignment Timer Common

SIB3

Cell Reselection Information

Q-Hyst

Speed State Reselection Parameters

Cell Reselection Serving Freq Info

S-Non-Intra Search Info

Threshold Serving Low Value

Cell Reselection Priority

Intra Freq Cell Reselection Infoq-RxLevMin

p-Max

s-IntraSearch

Allowed Measurement Bandwidth

Presence Antenna Port 1

Neighbor Cell Config

t-ReselectionEUTRA

t-ReselectionEUTRA-SF

SIB4

Intra Freq Neighbour Cell List

Physical Cell ID

q-OffsetCell

Intra Freq Black Cell List

CSG Physical Cell Id Range

Inter Frequency Carrier Freq Info

Inter Frequency Neighbour Cell List

Inter Frequency Neighbour Cell Info

Inter Frequency Black Cell List

SIB6Carrier Frequency List UTRA (FDD/TDD)

t-Reselection UTRA

SIB7

t-Reselection GERAN

Carrier Frequency Info List

SIB8

CDMA2000 Reselection Information

SIB9

Home eNB Name

SIB10

ETWS Primary Notification

SIB11

ETWS Secondary Notification

RRC Paging


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RRC Paging

Paging

eNB

Paging

Paging Record List

- UE Identity (S-TMSI or IMSI)

- CN Domain

System Info Modification

ETWS Indication

RRC Connection


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RRC Connection

RRC Connection RequesteNBUE

RRC Connection Setup

RRC Connection Setup Complete

RRC Connection Request

UE IdentityCause


Radio Resource Config Dedicated- srb-ToAddModList

- drb-ToAddModList

- drb-ToReleaseList

- MAC Main Config

- SPS Config

- Physical Config Dedicated

RRC Connection Setup Complete

Selected PLMN-Identity

Registered MME

Dedicated Info NAS

RRC Connection Reject


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RRC Connection Reject

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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Initial Security Activation

eNBUE

Security Mode Command

Security Mode Complete

Security Mode Failure

Security Mode Command

Ciphering Algorithm

Integrity Protection Algorithm

RRC Connection Reconfiguration


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RRC Connection

Reconfiguration Request

Measurement Configuration

Mobility Control Information

Dedicated Info NAS

Radio Resource Config Dedicated- srb-ToAddModList

- drb-ToAddModList

- drb-ToReleaseList

- MAC Main Config

- SPS Config

- Physical Config Dedicated

Security Configuration HO


Request

eNBUE


Complete

RRC Connection Re-establishment

Counter Check


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Counter Check

Counter Check

drb-CountMSB-InfoList

- DRB-CountMSB-Info-- drb-Identity

-- countMSB-Uplink

-- countMSB-Downlink

Counter CheckeNBUE

Counter Check Response



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RRC Connection Re establishment

The UE initiates the procedure when AS security has beenactivated 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.

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RRC Connection Re establishment

Page110

RRC Connection Reestablishment Request

eNBUE

RRC Connection Reestablishment

RRC Connection Reestablishment Complete



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Cause Values

The RRC Connection Reestablishment Request messageincludes a cause value:

Reconfiguration Failure.

Handover Failure. Other Failure.

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RRC Connetion Release


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RRC Connetion Release

RRC Connection Release

Release Cause

Redirected Carrier Info

Idle Mode Mobility Control Info

RRC Connection Release

eNBUE

Information Transfer


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Information Transfer

DL or UL Information Transfer

Dedicated Info NAS

Dedicated Info CDMA2000-1XRTT

Dedicated Info CDMA2000-HRPDDL Information TransfereNBUE

UL Information Transfer



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Intra-frequency measurements: measurements at the

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.

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Page115


Request


- measObjectToRemoveList

- measObjectToAddModList

- reportConfigToRemoveList- reportConfigToAddModList

- measIdToRemoveList

- measIdToAddModList

- quantityConfig

- measGapConfig

- s-Measure


Request

eNBUE


Complete

Measurement Objects


116/279


Measurement Objects

Page116

RRC Connection ReconfigurationRequest


- measObjectToAddModList

-- measObjectId

-- measObject measObjectEUTRA

--- carrierFreq

--- allowedMeasBandwidth

--- presenceAntennaPort1

--- neighCellConfig

--- offsetFreq

--- cellsToAddModList

---- cellIndex

---- physCellId---- cellIndividualOffset


Request

eNBUE


Complete

Report Configuration


117/279


Report Configuration

Page117

RRC Connection ReconfigurationRequest


- reportConfigToAddModList

-- reportConfigId

-- reportConfig reportConfigEUTRA

--- triggerType event

---- eventId e.g. eventA1----- a1-Threshold threshold-RSRP

---- hysteresis

---- timeToTrigger

--- triggerQuantity (RSRP)

--- reportQuantity

--- maxReportCells--- reportInterval

--- reportAmount


Request

eNBUE


Complete

Periodical Reporting


118/279


Periodical Reporting

Page118

eNB

UE

eNB

Periodical

ReportingReport Interval (ms120, ms240, ms480, ms640,

ms1024, ms2048, ms5120, ms10240,min1, min6, min12, min30, min60)

Measurement Based Triggering

E t


119/279


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

Event A2 - serving cell becomes worse than the threshold.

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

serving cell.

Event A4 - neighbor cell becomes better than the threshold.

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)


120/279


gg ( )

Page120

eNB

UE

eNB

Event

Reporting

A3 Offset

(-30 to 30dB)

TTT (Time to

Trigger)

Report Interval and

Report Amount

Event A3 Example


121/279


p

Page121

UE

Event

Reporting

Serving

Cell

Serving Cell(Including

Offsets)

Neighboring Cell

(Including

Offsets)

Enter

Leave Enter

Hysteresis

TTT Measurement

Report

TTT Not

Met

Event A3 TTT Timer


122/279


Entering condition:

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

Leaving condition:

Mn+ Ofn + Ocn+ Hys < Ms + Ofs + Ocs + Off

Page122

Cell Selection


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Qrxlevmeas

Qrxlevmeas

eNB

UE

eNB

eNB

Qrxlevmeas

Srxlev > 0

Srxlev = Qrxlevmeas - (Qrxlevmin + Qrxlevminoffset) - Pcompensation

Cell Reselection


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Intra-frequency Measurements

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

intra-frequency measurements.

If Squal


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High and Medium Mobility State

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

Rs = Qmeas,s + Qhyst

Rn = Qmeas,n - Qoffset

Questions


126/279

Copyright 2010 Huawei Technologies Co., Ltd. All rights reserved.Page126

What are the two main RRC states?

Questions


127/279


True/False. LTE uses substates like Cell_PCH andCell_FACH?

Questions


128/279


Which message is used to trigger LTE intra systemhandovers?

a. System Information.

b. RRC Connection Setup.

c. RRC Connection Reconfiguration.

d. Measurement Control.

Questions


129/279


Which event indicates that a neighboring cell is better than aserving cell by an offset?

a. Event A1.

b. Event A2.

c. Event A3.

d. Event A4.

Questions


130/279


Which message is used to configure measurement reportingand criteria?

a. System Information.

b. RRC Connection Setup.

c. RRC Connection Reconfiguration.

d. Measurement Control.

Contents


131/279


1. EPS Architecture

2. EPS Protocols






8. Mobility in LTE

Contents


132/279



5.1 PDCP Operation

PDCP Functions


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Add PDCP Header

Ciphering

Integrity Protection

(Control Plane)

Header Compression (User Plane)

Sequence Numbering

Packet associated

to a PDCP SDU

Packet notassociated

to a PDCP

SDU

Remove PDCP Header

Deciphering

Integrity Verification

(Control Plane)

Header Decompression (User Plane)

Re-ordering (User Plane)

Packet associated

to a PDCP SDU Packet notassociated

to a PDCP

SDU

UE/eNB Transmitting PDCP Entity UE/eNB Receiving PDCP Entity

Radio Interface

PDCP Header Compression

Profiles


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Profiles

Page134

Profile Identifier Usage: Reference

0x0000 No compression RFC 4995

0x0001 RTP/UDP/IP RFC 4815

0x0002 UDP/IP RFC RFC 3095, RFC 4815

0x0003 ESP/IP RFC RFC 3095, RFC 4815

0x0004 IP RFC 3843, RFC 4815

0x0006 TCP/IP RFC 4996

0x0101 RTP/UDP/IP RFC 5225

0x0102 UDP/IP RFC 5225

0x0103 ESP/IP RFC 5225

0x0104 IP RFC 5225

Control Plane PDCP Data PDU for

SRB


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SRB

Page135

R

Data

MAC-I (cont.)

Oct 1

Oct N

R R PDCP SN

MAC-I

MAC-I (cont.)

MAC-I (cont.)

Oct N-1

Oct N-2

Oct N-3

Oct 2...Message

Authentication

Code

Reserved

Bits

Sequence Number for

SRB

Data Plane PDCP Data PDU for

DRB (Long PDCP SN)


136/279


D/C Oct 1R R PDCP SN

Oct 2

R

Data

PDCP SN (Continued)

Oct 3

...

DRB (Long PDCP SN)

Page136

1=Data

PDU

12 bit Sequence Number

UM and AM Data

Data Plane PDCP Data PDU for

DRB (Short PDCP SN)


137/279


D/C Oct 1PDCP SN Oct 2Data

...

DRB (Short PDCP SN)

Page137

1=Data

PDU

7 bit Sequence

Number UM Data

PDCP Control PDU - Status Report


138/279


D/C Oct 1PDU Type

Bitmap (optional)

...

FMS

FMS (cont.)

Bitmap (optional)

Oct 2

Oct 3

Oct 2+N

Page138

0=Control

PDU

First Missing PDCP

Sequence Number000

PDCP Control PDU - Feedback

Report


139/279


D/C Oct 1PDU TypeInterspersed ROHC Feedback Packet

...

R R R R

Report

Page139

0=Control

PDU

001

PDCP ROHC


140/279


Initialization and Refresh

First - Order

Second - Order

Page140

PDCP ROHC


141/279


VoIP IPv4UDPRTP

VoIP

UEeNB

PDCP

HeaderPDCP

Header

Compressed

First Order

ROHC

Feedback

PDCP Integrity


142/279


EIAKey

Count

Message

Direction

Bearer

EIAKey

Count

Message

Direction

Bearer

MAC-I XMAC-I

Count Value


143/279


HFN PDCP SN

HFN part is equal to 32

minus length of PDCP SN

PDCP Ciphering


144/279


EEAKey

Count

Bearer

Direction

Length

EEAKey

Count

Bearer

Direction

Length

Keystream

Block

Keystream

Block

Plaintext

Block

Plaintext

Block

Ciphertext

Block

Questions


145/279


True / False. PDCP is involved in NAS Ciphering.

Questions


146/279


What size PDCP Sequence Number supports UM and AM

RLC Modes?

a. 5bits.

b. 7bits.

c. 12bits.

d. 14bits.

Questions


147/279


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

the air interface?

Questions


148/279


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

Contents


149/279


1. EPS Architecture

2. EPS Protocols






8. Mobility in LTE

Contents


150/279



6.1 RLC Functions

6.2 RLC Modes and Formatting

6.3 MAC Functions

6.4 MAC Architecture

6.5 MAC Formatting

Contents


151/279



6.1 RLC Functions


6.3 MAC Functions


6.5 MAC Formatting

Services Provided to Upper Layers


152/279


RLC

Upper Layers

TM-

Entity

UM-

Entity

UM-

Entity

TM-

EntityAM-Entity

Services Expected from Lower

Layers


153/279


y Data transfer.

Notification of a transmission opportunity, together with the

total size of the RLC PDU (Protocol Data Units) to be

transmitted in the transmission opportunity.

Page153

Functions of the RLC Sublayer


154/279


Transfer of upper layer PDUs.

Error correction through ARQ.

Concatenation, segmentation and reassembly of RLC SDU (Service Data

Units).

Re-segmentation of RLC data PDUs. Reordering of RLC data PDUs.

Duplicate detection.

RLC SDU discard.

RLC re-establishment.

Protocol error detection.

Page154

Contents


155/279



6.1 RLC Functions


6.3 MAC Functions


6.5 MAC Formatting

Transparent Mode RLC


156/279


Transmission Buffer

Uu

Transmitting

TM-RLC Entity

Receiving

TM-RLC Entity

BCCH/PCCH/CCCH

Unacknowledged Mode RLC


157/279


Transmission Buffer

Uu

Transmitting

UM-RLC Entity

Receiving

UM-RLC Entity

Segmentation and

Concatenation

Add RLC Header

SDU Reassembly

Remove RLC Header

Reception Buffer and

HARQ Reordering

DTCH

Acknowledged Mode Functions


158/279


Segmentation and reassembly.

Concatenation.

Error correction.

In-sequence delivery of higher layer data. Duplicate detection.

Page158

Acknowledged Mode RLC


159/279


Transmission BufferAM-RLC Entity

Retransmission

Buffer

Add RLC Header

SDU Reassembly

Remove RLC

Header

Reception Buffer &

HARQ Reordering

Routing

RLC

Control

Segmentation and

Concatenation

DCCH/DTCH DCCH/DTCH

RLC PDU Formats


160/279


Data Transfer Mode PDU Name

Transparent TMD

Unacknowledged UMD

Acknowledged AMD

AMD Segment

Status

RLC UMD 5bit SN


161/279


FI

Data

Oct 1

Oct N

E SN

Oct 2

Data

...

Page161

Frame

Information

Extension Bit 5bit SN

RLC UMD 10bit SN


162/279


R1

Data

Oct 1

Oct N

R1 R1 SN

Oct 2

Data

...

SN

EFI

Oct 3

Page162

10bit SN

Frame

Information Extension Bit

FI Field Interpretation


163/279


Value Description

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.

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.

RLC UMD with 2 Length Indicators


164/279


FI

Data

Oct 1E = 1 SN

Oct 2

Data

...

E = 1 LI1LI1 E = 0 LI2

LI2

Oct N

Page164

Padding is required

for odd number of

extensions

AMD PDU


165/279


D/C

Data

Oct 1

Oct N

RF=0 P SN

Oct 2

Data

...

SN

EFI

Page165

10bit SN

D/C=1

(Data PDU)

Re-segmentation Flag

(AMD PDU) Poll Bit Extension Bit

RLC AMD with Odd Number of

Length Indicators


166/279


D/C

Data

Oct 1

Oct N

RF=0 P SN

Oct 2

Data

...

SN

E = 1FI

E = 0 LI

LI LI Padding for odd

number of LIs

RLC AMD PDU Segment


167/279


D/C

Data

Oct 1

Oct N

RF=1 P SN

Oct 2

Data

...

SN

E = 0FI

SO

SO

LSF Oct 3

Oct 4

Oct 5

Page167

Segment

Offset

Last Segment

Flag

Re-segmentation Flag(AMD PDU Segment)

AMD Segmentation


168/279


Data AMD

AMD

SegmentDataData

AMD

Segment

Segment

Offset x

Page168

Segment Offset x

LSF=1Segment Offset 0

LSF=0

RLC Status PDU


169/279


D/C Oct 1CPT ACK_SN

Oct 2

...

ACK_SN

NACK_SN Oct 3

Oct 4Oct 5

E1

E1 E2 NACK_SNNACK_SN E1 E2

SOstart

SOstart

SOend

SOend

SOend Padding

Oct 6

Oct 7

Oct 8

Oct 9

Page169

D/C=0

(Control PDU)

Control PDU Type1 = Status PDU

Set of NACK_SN,E1 and E2

Set of SOstart

and SOend

follows

RLC Timers


170/279


t-PollRetransmit

t-Reordering

t-StatusProhibit

Page170

Configurable Parameters


171/279


maxRetxThreshold

pollPDU

pollByte

sn-FieldLength

Page171

Contents


172/279



6.1 RLC Functions


6.3 MAC Functions


6.5 MAC Formatting

MAC Services


173/279


Mapping

Multiplexing

HARQ (Hybrid Automatic Repeat Request)

Radio Resource Allocation

Formatting

Page173

Services Expected from the

Physical Layer


174/279


Data transfer services.

Signaling of HARQ feedback.

Signaling of Scheduling Request.

Measurements, e.g. CQI (Channel Quality Indication).

Page174

Contents


175/279



6.1 RLC Functions


6.3 MAC Functions


6.5 MAC Formatting

MAC Architecture


176/279


Random

Access

Control

(De-) Multiplexing

Logical Channel Prioritization (UL

Only)

Control

HARQ

PCCH BCCH CCCH DCCH DTCH MAC Control

PCH BCH DL-SCH RACHUL-SCH Lower Layers

MAC

Contents


177/279



6.1 RLC Functions


6.3 MAC Functions


6.5 MAC Formatting

MAC PDU for DL-SCH and UL-

SCH


178/279


R

Data

Oct 1

Oct N

R E

Oct 2L

LCID

F

Oct 3

Oct 4

"1" to indicate another

set of R/R/E/LCID

Format Bit

0=7bits

R

Data

Oct 1

Oct N

R E

Oct 2L

LCID

F

Oct 3

Oct 4

LFormat Bit

1=15bits

Logical Channel

Identity

LCID Coding for DL-SCH


179/279


LCID Index Description

00000 CCCH

00001-01010 Identity of the logical channel

01011-11011 Reserved

11100 UE Contention Resolution Identity

11101 Timing Advance Command

11110 DRX Command

11111 Padding

LCID Coding for UL-SCH


180/279


LCID Index Description

00000 CCCH

00001-01010 Identity of the logical channel

01011-11001 Reserved

11010 Power Headroom Report

11011 C-RNTI

11100 Truncated BSR

11101 Short BSR

11110 Long BSR

11111 Padding

MAC Subheaders


181/279


ASub

Header A

Sub

Header B

Sub

Header CBC

Page181

MAC is able to multiplex Logical

Channels into single transmission

LCID indicates

content

Timing Advance Parameter


182/279


Timing Advance Command Oct 1R R

Buffer Status Report


183/279


Short BSR and Truncated BSR format

Long BSR format

Page183

Buffer Size Oct 1LCG ID

Buffer #0 Oct 1

Buffer #1

Buffer #1

Buffer #2Buffer #2 Buffer #3

Power Control Headroom


184/279


eNBUE

Power

PMaximum UE

Output Power

PHR

Power Headroom Oct 1R R

Power Headroom Report Mapping


185/279


PH Reported value Measured Quantity Value (dB)

0 POWER_HEADROOM_0 -23 PH < -22




. . .

62 POWER_HEADROOM_62 39 PH < 40

63 POWER_HEADROOM_63 PH 40

Random Access Process


186/279


PRACH Preamble Sequence

MAC Scheduling Grant

RACH

RRC Connection RequestUL-SCH


RRC Connection Setup CompleteUL-SCH

DL-SCH

UE eNB

Signalling Radio Bearer

(RRC Connected)

Page186

MAC RAR

MAC

Contention

Resolution

Random Access Response


187/279


MAC RAR A

Sub Header A

MAC RAR B

MAC RAR n

RAPID Oct 1E T

Sub Header B

Sub Header n

TAR

UL GrantTA

UL Grant

UL Grant

Temporary C-RNTI

Temporary C-RNTI

MAC RAR

RAPID or BI

Uplink Grant


188/279


Parameter Size(bits)

Description

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.

TPC Command for Scheduled PUSCH 3 Initial power control feedback, e.g. -4dB.

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


189/279


MAC RAR B

Sub Header A

MAC RAR n

BI Oct 1E T

Sub Header B

Sub Header n

RAPID or BI

R R

Backoff Indicator0 - 960ms

Questions


190/279


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

Questions

Wh i f RLC b d f RLC


191/279


What two sizes of RLC sequence number are used for RLC

UM?

a. 5bits.

b. 7bits.

c. 10bits.

d. 12bits.

Questions

T / F l Th AMD PDU t i l il bl i


192/279


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

Release 8 HSPA+ systems?

Questions

Whi h t i d b MAC f l i l h l


193/279


Which parameter is used by MAC for logical channel

mapping?

Questions

H LCID l il bl f EPS b ?


194/279


How many LCID values are available for EPS bearers?

a. 4.

b. 8.

c. 10. d. 12.

Contents

1 EPS Architecture


195/279


1. EPS Architecture

2. EPS Protocols






8. Mobility in LTE

Contents

7 X2/S1 Interface and Protocols


196/279



7.1 X2AP Functions and Procedures

7.2 S1AP Functions and Procedures

7.3 User Plane GTP Functions and Procedures

Contents

7 X2/S1 Interface and Protocols


197/279



7.1 X2AP Functions and Procedures

7.2 S1AP Functions and Procedures

7.3 User Plane GTP Functions and Procedures

X2AP Functions and Procedures


198/279


E-UTRAN

X2

eNB

eNB

IP

Layer 2

Layer 1

SCTP

X2AP

IP

Layer 2

Layer 1

UDP

GTP-U

Control Plane User Plane

IPRNL

TNL

Mapping between X2AP Functionsand X2AP EPs


199/279


Function Elementary Procedure(s)Mobility Management a) Handover Preparation.

b) SN Status Transfer.

c) UE Context Release.

d) Handover Cancel.

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)


200/279


Elementary Procedure Initiating

Message

Successful Outcome Unsuccessful Outcome

Response message Response message

Handover Preparation HANDOVER

REQUEST

HANDOVER REQUEST

ACKNOWLEDGE

HANDOVER PREPARATION

FAILURE

Reset RESET REQUEST RESET RESPONSE

X2 Setup X2 SETUP

REQUEST

X2 SETUP RESPONSE X2 SETUP FAILURE

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)


201/279


Elementary Procedure Initiating Message

Load Indication LOAD INFORMATION

Handover Cancel HANDOVER CANCEL

SN Status Transfer SN STATUS TRANSFER

UE Context Release UE CONTEXT RELEASE

Resource Status Reporting RESOURCE STATUS UPDATE

Error Indication ERROR INDICATION

Message Formatting

Presence


202/279


Presence

Range

Criticality

Page202

Basic Mobility Procedures -Handover Preparation

Handover Request

Old eNB UE X2AP ID


203/279


Cause

ECGIGUMMEI

UE Context Information

- MME UE S1AP ID

- UE Security Capabilities

- AS Security Information

- UE Aggregate Maximum Bit Rate

- Subscriber Profile ID for RAT/Frequency Priority

- E-RAB To Be Setup List

UE History Information

Trace Activation (O)

SRVCC Operation Possible (O)

Handover Request Acknowledge

Old eNB UE X2AP ID

New eNB UE X2AP ID

E-RABs Admitted List

E-RABs Not Admitted List (O)

Target eNB To Source eNB Transparent Container

Crit icality Diagnostics (O)

Handover Request

Handover Request Acknowledge

eNB eNBSource Target

X2 Handover Preparation Failure


204/279


Handover Request

Handover Preparation Failure

eNB eNB

Source Target

Page204

Handover Preparation Failure

Old eNB UE X2AP ID

Cause

Criticality Diagnostics (O)

X2 SN Status Transfer


205/279


SN Status Transfer

eNB eNB

SN Status TransferOld eNB UE X2AP ID

New eNB UE X2AP ID

E-RABs Subject To Status Transfer List

- E-RAB ID

- Receive Status Of UL PDCP SDUs (O)

- UL COUNT Value- DL COUNT Value

Source Target

X2 UE Context Release


206/279


UE Context Release

eNB eNB

UE Context Release

Old eNB UE X2AP ID

New eNB UE X2AP ID

Source Target

X2 Handover Cancel


207/279


Handover Cancel

eNB eNB

Handover Cancel

Old eNB UE X2AP ID

New eNB UE X2AP ID

CauseSource Target

X2 Load Indication


208/279


Load Indication

eNB eNB

Load IndicationCell Information

- Cell Information Item

-- Cell ID

-- UL Interference Overload Indication

-- UL High Interference Information

--- Target Cell ID--- UL High Interference Indication

--- RNTP (Relative Narrowband Tx Power)

X2 Uplink Interference


209/279


Medium

eNB

Medium Medium High High

PRB 0 PRB 1 PRB 2 PRB 3 PRB 4

Low

PRB 5

0 1 1 0 0 0

Page209

UL Interference

Overload Indication

UL High Interference

Information (bitmap)

Downlink RNTP


210/279


eNB

Downlink

Power

PRB 1 PRB 2 PRB 3 PRB 4 PRB 5PRB 0

1 0 0 1 1 1

RNTP (Relative

Narrowband Tx Power)

Bitmap and Parameters

X2 Resource Status Request

Resource Status Request


211/279


eNB1 Measurement ID

eNB2 Measurement ID (C) - If Registration Stop

Registration Request - Start or Stop

Report Characteristics (O)

Cell To Report

Reporting Periodicity (O)

Resource Status Response

eNB1 Measurement ID

eNB2 Measurement ID

Criticality Diagnostics (O)

Resource Status Request

Resource Status Response

eNB eNB

X2 Resource Status Update

Documents

OEA000200 LTE Protocols and Procedures ISSUE 1.01