EPC Basics Training

5/28/2018 EPC Basics Training

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1/29/2011 CONFIDENTIAL Copyright 2009 Tech Mahindra Limited 2


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FamilyMetrics

LTE UMTS(3gpp 4G)

802.16e(WiMAX)

Bandwidth

(Mbps)

Up Link 50 70

Down Link 100 70

Latency(ms)

ControlPlane

< 100 100

User Plane < 5 5


Mobility

Up to 500 kmphOptimized for 0 to 15kmph

Up to 350 kmphOptimized for 0 to 15kmph

Coverage(Cell Size)

5-100 km with slightdegradation after 30 km.

5-100 km withdegradation after 30 km.

Control Plane Capacity> 200 users per cell (for5 MHz spectrum)


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eNB

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GxOperator's IP

Services(e.g. IMS, PSS etc.)

Rx

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PDCP

UE eNB MME

NAS NAS

RRC

SCTP

IP

S1AP

UDP

GTP-Cv2

S-GW

RRC

PDCP SCTP

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UE eNB MME S-GW P-GW

Attach Request Attach RequestCreate Session Request

Create Session Request

PCRF Interaction

PCRF

Create Session Response

Create Session ResponseAttach Accept

Radio BearerEstablishment Request

First Downlink DataMay Arrive

HSS


Radio BearerEstablishment Response

Attach Complete

First Uplink Data

Modify Bearer Request

Modify Bearer Response

First Downlink Data

Update Location Request

Update location Response


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UE Old MMENew MMEeNodeB New S- GW Old S- GW PDN GW HSS

TAU RequestTAU Request

Context Response

Context Request

Authentication

Create Session Request

Crate Session Response

Create Session Response

Crate Session Request

UE changes to newa Tracking Area

Context Acknowledge


Update Location Ack

TAU Accept

TAU Complete

Update Location

Cancel Location

Cancel Location Ack

Delete Bearer Response

Delete Bearer Request


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MME Serving GW PDN GW

2. NAS: Service Request

1. NAS: Service Request

3. Authentication

HSS

*4. Initial Context Setup Request

5. Radio Bearer Establishment

UE eNodeB PCRF


7. Initial Context Setup Complete

6. Uplink Data

8. Modify Bearer Request

12. Modify Bearer Response

11. Modify Bearer Response

(A)

10. PCEF Initiated IP-CANSession Modification

9. Modify Bearer Request


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1. Downlink Data

2.Downlink Data Notification

MME S-GW P-GW

3. Paging

4. Paging

HSSUE eNodeB


5. UE triggered Service Request procedure

Downlink Data


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(A)

UE eNodeB MME Serving GW PDN GW PCRF

1. Detach Request

2. Delete Session Request

3. Delete Session Request

4. Delete Session Response

HSS


6. Delete Session Response

7. Detach Accept

. n erac on

8. Signaling Connection Release


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UE Source eNB MME Serving GwTarget eNB

Measurement Control

Packet DataPacket Data

UL allocation

Measurement Reports

HO decision

Handover Re uest User Data

Legend


Handover Response

Admission Control

DL allocation

Handover Command

L1/L2 Signalling

L3 Signalling


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UE Source eNB MME Serving GWTarget eNB

Release Resource

Modify Bearer request

Switch DL path

Flush DL buffer

Path Switch Request

Modify Bearer Response

Path Switch Request Ack


User Data

L1/L2 Signaling

L3 Signaling

Legend

continue delivering

in-transit packets

Release

Resources

Packet dataPacket data


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Handover completion

UESourceeNodeB

SourceServing GW PDN GW

MME TargetServing GW

TargeteNodeB

Handover execution

Downlink and uplink data

Handover preparation

Forwarding of data

Downlink dataUplink data


3 a. Create Session Request

.

3 b. Create Session Response

2. Create Session Request

4. Create Session Response

5. Path Switch Request Ack

6. Release Resource

Downlink data

Uplink data

7a. Delete Session Request

7b. Delete Session Response


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EPC Basics Training

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Transcript of EPC Basics Training