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MEGACO. Presented by: Yogendra Jain RadiSys Corporation (617) 244-0406 http://www.radisys.com. What is MEGACO?. Next-generation gateway control protocol jointly proposed by IETF and ETSI (TIPHON) Follow-on development to MGCP Will not inter-operate with MGCP

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MEGACO

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Megaco

MEGACO

Presented by:

Yogendra Jain

RadiSys Corporation

(617) 244-0406

http://www.radisys.com


What is megaco

What is MEGACO?

  • Next-generation gateway control protocol jointly proposed by IETF and ETSI (TIPHON)

    • Follow-on development to MGCP

    • Will not inter-operate with MGCP

  • Interface definition for use between gateway components - the Media Gateway (MG) and Media Gateway Controller (MGC)

  • Controls MG from external control elements


Megaco features benefits

Performance:

MEGACO introduces several new concepts (such as contexts, ephemeral terminations, transactions, commands such as MOVE etc.) to reduce the overhead associated with supplementary services (like call waiting), multi-party conferencing and multimedia support.

Convergence:

IETF (MEGACO WG) and ITU-T (SG16) agreed to publish a combined document from now onwards. This should lead to the definition of a common protocol that is acceptable to both the telecom (ITU-T and ETSI) and datacom (IETF) standardization organizations.

Adoption:

Vendors today have joined to form industry forums (SoftSwitch) and support initial implementations based on MGCP, but most of the large vendors are fully supporting MEGACO and have roadmaps to deliver MEGACO in the year 2000. Cisco, Lucent, HP, Level3, Nortel, etc.

Support:

MEGACO is designed from the ground up to provide support for multimedia (audio, video, etc) and a multitude of packet technologies (ATM etc.).

MEGACO - Features & Benefits


Gateway components

Gateway Components

  • Media Gateway Controller (MG): Monitors and controls media end points, resources and connections.

  • Media Gateway (MGC): Controls MG resources and interfaces with SG for call processing.

  • Signaling Gateway (SG): Responsible for signaling termination and transport of signaling information to MGC.

H.323

Packet Interface

Gate

Keeper

H.323

EndPoint

H.323

H.323

Media Gateway Controller

MEGACO/MGCP

SIGTRAN

Signaling Gateway

Media Gateway

SCN Bearer

+ CAS

SCN Interface

SCN Signaling

Media


Mgc mg sg communication

Fax Fax Fax Fax Fax Fax

Fax Fax Fax Fax Fax Fax Fax

Fax Fax Fax Fax Fax Fax Fax

Fax Fax Fax Fax Fax Fax Fax

Fax Fax Fax Fax Fax Fax Fax

Fax Fax Fax Fax Fax Fa

Fax Fax Fax Fax Fax Fax

Fax Fax Fax Fax Fax Fax Fax

Fax Fax Fax Fax Fax Fax Fax

Fax Fax Fax Fax Fax Fax Fax

MEGACO

H.323

MEGACO

MGC-MG-SG Communication

Media

Gateway

Media

Gateway

Internet

Media

Gateway

Controller/

Signaling

Gateway

Media

Gateway

Controller/

Signaling

Gateway

Media

Gateway

Media

Gateway

Media

Gateway

Media

Gateway

Media

Gateway

Media

Gateway


Mg functionalities

Resource Management

Reservation and release of resources

Media Processing

Termination

MGC-MG Association Management

Connection Management

Support multiple media types (voice, fax, video, text)

Point-to-point and multi-point connections

Media mix (conference bridge capabilities)

Set priorities

MG Functionalities


Mg system architecture

MG System Architecture

Control Processor

NM Agent (interface to CPU board for system management)

Resource

Manager

Network Interface Module

(TCP/IP Stack + Ethernet Drivers)

To MGC

MG Engine

MG-MGC Interface Module

Transport Protocol Stacks (RTCP)

To PDN

DRIVERS + API INTERFACE

RTP

DSP

Signal Processing Module (DSP Algorithm/Codecs)

Voice Services

(e.g Playing Voice)

E1/T1


Single chassis mg

SPIRIT-6040 (VxWorks)

SPIRIT-6040 (VxWorks)

TASK + BSP APIs

TASK + BSP APIs

Message Routing Module

Message Routing Module

Endpoint Controllers

Transport Services Mod.

Endpoint Controllers

Transport Services Mod.

UPA

TCP/IP

UPA

TCP/IP

Drivers + DSP Algorithms

Drivers + DSP Algorithms

Ethernet I/F

T1/E1 I/F

Ethernet I/F

T1/E1 I/F

Single Chassis MG

CLI Module

TCP/IP stack

Serial I/F

Ethernet I/F

Configuration

Manager

MEGACO

Transport

Health and

Status Mgr.

Debug and

Trace Module

Transaction

Handler

Resource

Manager

RadiSys Modules

Stats Collection

Module

Context

Manager

Termination

Manager

O.S. Modules

Message Routing Module

TASK + BSP APIs

TDM Bus

cPCI Bus


Megaco convergence enabler

Products of

Tomorrow

(MEGACO)

Products of

Today

(H.323, MGCP)

MEGACO: Convergence Enabler

  • Enhanced Services:

  • Transaction - e-Commerce

  • Click-N-Call

  • Interactive Chat

  • Surf-With-Me

  • Video Conferencing

  • Productivity - Communications

  • Virtual Second Line

  • Unified Messaging

  • Online Directory

  • Virtual Assistants

  • Multiple Party Calling

  • Video Answering Machine

  • Cost Savings

  • Toll Bypass

  • CoS Billing

  • Internet Voice Mail

  • Remote Access

Est. CAGR ‘97 - ‘03

Core Tech - 92%

Gateway Equip - 121%

Applications - 125%

Services - 168%

Source: Piper Jeffrey Inc.


Megaco vs mgcp faqs

MEGACO -vs- MGCP FAQs

  • Isn’t MGCP the standard?

    • Many vendors are developing products using the MGCP standard. However, the IETF/ITU discovered that the MGCP architecture has performance limitations and lacks multi-media support.

  • Will MEGACO eventually replace MGCP?

    • Yes, the IETF will not support MGCP beyond revision 5.0. MGCP vendors have committed to moving to MEGACO as soon has it submitted as an RFC.

  • Will this be the de facto standard?

    • MEGACO will emerge as the media gateway standard for mapping packet, frame and cell networks due to convergence, performance, support & adoption.

  • How does MEGACO fit within my strategic planning?

    • MEGACO allows gateway manufacturers to differentiate their products with better performance and more features.


Ivr support

IVR Support

  • IVR MG provides automatic voice response and switching services in response to DTMF signals from the SCN

  • MEGACO commands are used to command the IVR MG to:

    • Play announcement

      • Collect DTMF digits

    • Record Voice

    • Specify Play characteristics

    • Specify Event Collection characteristics

    • Provide a base set of voice variables

      • Example: For US Currency, “1995” should be understood by the MG as “Nineteen dollars and ninety-five cents”


Performance qos

Performance / QoS

  • Ability to specify QoS for the connection between MGs

  • Means to change QoS during a connection

  • Set QoS thresholds

  • Notify when thresholds cannot be maintained

  • Jitter buffer management

    • Support for dynamic jitter buffer size

    • Bad frame masking


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