Pseudo Wire Emulation

GLN Technical Center,

NEC Corporation

Presentation: Yes Submission : Yes

NEC Confidential Page 2 © NEC Corporation 2012

Pseudo Wire Emulation (PWE)

▌It is called PWE3 (Pseudo Wire Emulation Edge to Edge) accurately

▌Circuit Emulation technology PWE are techniques to emulate TDM/ATM service over packet network.

• TDM/ATM traffic is encapsulated and transmitted to the packet network.

PWE enables transport of non-IP based services over IP network, resulting in cost reduction and network consolidation.

Enables continual provision of legacy services over IP network.

TDM / ATM over Packet TDM/ATM

Packet Network

TDM/ATM PWE PWE

TDM Network

TDM/ATM TDM/ATM

Presentation: Yes Submission : Yes

NEC Confidential Page 3 © NEC Corporation 2012

Application Example

TDM

Packet

BTS

Node-B

IP Node-B/

eNB

BSC

RNC

IP RNC/

MME ETH ETH

ETH

TDM TDM

TDM

ATM ATM

ATM

TDM TDM

ATM ATM

ETH ETH

TDM

Packet

BSC

RNC

IP RNC/

MME

BTS

Node-B

IP Node-B/

eNB

ETH

PWE PWE

Presentation: Yes Submission : Yes

NEC Confidential Page 4 © NEC Corporation 2012

RFC4553

Structure-Agnostic Time Division Multiplexing (TDM) over Packet (SAToP)

- whole E1/T1 Frame based packetization (Unstructured)

RFC5086

Structure-aware TDM Circuit Emulation Service over Packet Switched Network (CESoPSN)

-N×DS0 based packetization (structured)

Payload

CESoP

…

… …

… … … …

Header Header

… … … …

TDM Frame/Packet

E1 Payload

Transport

Packet Header

(IP/VLAN/MPLS)

CES

…

… …

… … … …

Ch32

Header Header

… … … …

Ch32

TDM

Payload

…

… …

Header Header

… …

Ch2 Ch2 Ch2 Ch2

Header Header

… …

Ch2 Ch2 Ch1 Ch1 Ch32 Ch2 Ch2 Ch1 Ch1

CESoP

Payload

…

… …

Header Header

… …

Ch2 Ch0 Ch32 Ch2 Ch0

Header Header

… …

Ch2 Ch2 Ch1 Ch0 Ch2 Ch2 Ch1 Ch0

CES

Ch0

Ch32 Ch0 Ch0 Ch32 Ch0

Ch32 Ch0 Ch32 Ch0

E1

Ch32 Ch0

Ch32 Ch0

Transport

Packet Header

(IP/VLAN/MPLS)

Ch32

Ch32

E1

TDM

E1

TDM

TDM -> CES SAToP/

CESoPSN E1

ETH

TDM Pseudowire function (SAToP and CESoPSN)

Ch2 Ch2

Presentation: Yes Submission : Yes

NEC Confidential Page 5 © NEC Corporation 2012

RNC

BTS

Node-B/

BTS

PRC

E1 PDH

TDM Backhaul (Sync Network)

Clock Distribution

RNC

BTS

Node-B/

BTS

PRC

E1 PDH Packet Backhaul (Async Network)

- Data Buffer slip - Bit error - hand-off failure etc..

▌Synchronization is necessary to avoid data slipping, bit error, hand-off failure, etc. in the mobile network.

▌Adaptive Clock Recovery (ACR), IEEE1588, Synchronous Ethernet, etc. are used to synchronize in the Packet network.

Synchronization in the PWE network

Presentation: Yes Submission : Yes

NEC Confidential Page 6 © NEC Corporation 2012

ACR (Adaptive Clock Recovery)

▌Inserts clock information to packet header (Control Word or RTP)

▌Recover clock information at clock slave node

Customer

Premises

Central

Office Master Node

TDM

Equipment

Slave Node TDM

Equipment

Filter

Queue

Service Service

E1 T1/E1

Clock Encode

Carrier PSN

Time

Stamp

TDM to

Packet

Packet

to TDM

In-Band

Out-of-Band

Primary

Reference

Source

fReference

Time

Stamp

ACR is used at slave node E1 Line sync or NE clock is used at mater node

Presentation: No Submission : No

Presentation: Yes Submission : Yes

NEC Confidential Page 7 © NEC Corporation 2012

TDM PWE (SAToP) setting by Web-LCT

1. Create VLAN for TDM PWE path (ex. VLAN=100)

2. PWE setting

3. Cross Connect Setting