1. Application Server Based on SoftSwitch
Tao Sun

2. Outline Introduction of Next Generation Network
Introduction of Application Server
Some Ideas about My Research

3. Next Generation Network
Background
Architecture of Next Generation Network
Character of Next Generation Network
Softswitch

4. Next Generation Network
Background
The trend of various heterogeneous networks amalgamation (Internet, PSTN and Others)
Service drive that requires to provide voice, data and multimedia services in one public network

5. Next Generation Network
Architecture

6. Next Generation Network
Access layer
Provide the way that various networks and equipments access to
core backbone network, including signal gateway, media gateway,
access gateway and others
Transport Layer
Provide the channels for various signals and media transport.
The core network of NGN is IP network.

7. Next Generation Network
Control Layer
Provide capabilities of call control, connection control, protocol
handling and others. Provide the open interface for service layer to
access to network resource in the low layer. The core part of the layer
is SoftSwitch
Service Layer
Provide various services for users, mainly including Service Support
Environment (Service Creation Environment, Application Server and
Service Management Server) , AAA Server and Network Manager
Server.

8. Next Generation Network
Character
Open and layered Architecture
Open Interface and protocol between layers
The division between service and call control, between call control and load

9. Next Generation Network
SoftSwtich
SoftSwitch is the core of Next Generation Network. It is
independent of Transport Layer. It provide the open
interface for service layer to access to network resource
in the low layer. Main functions are included:
Call control
Resource distribution
Protocol handling
Routing, Authentication and Charging

10. Application Server Service Support Environment
2017/4/1
Application Server
Service Support Environment
Application Server types
Application Server Functions

11. Application Server Service Support Environment
2017/4/1
Application Server
Service Support Environment
Service Support Environment is the core part of Service Layer, It includes
SCE (Service Creation Environment), AS (Application Server) and SMS
(Service Management Server).
AS is main body of Service Support Environment. SCE and SMS are also
as parts of AS. AS provides the environment that services are created,
remained, executed and managed. It also provides the development
platform for Third-Party.

12. Application Server Application Server types
2017/4/1
Application Server
Application Server types
The interface between SoftSwitch and Application Server mainly includes
SIP protocol (IETF) and Parlay standard (Parlay Organization). So it could
be sorted to AS based on Parlay API and AS based on SIP API
AS based on JAIN (Integrated Network APIs for the Java Platform) should
also be concerned

13. Application Server Application Server Functions
2017/4/1
Application Server
Application Server Functions
Provide the environment of service remain
and execution
It mainly includes service performance monitor, resource monitor ,
system log, service log, load control and balance, fault handling
Service life cycle management
It mainly includes service load, active, inactive and remove.

14. Application Server Support third-party service remain, execution and
management
Integrate Web server into AS and provide service
based on Web
Service Character Interaction avoidance, detection
and solution

15. Application Server Provide different levels development Interfaces to
third party
Such as Parlay API, SIP GUI API, SIP Servlet API, CPL, Voice XML
and others

16. Some Ideas
Plan 1
Research is focused on Application Server itself. The following
problems need to be concerned:
Service Creation Environment
Service Logic simulation test and collision detection
Service dynamic load and dynamic update
Service remain and execution environment
Service Character interaction avoidance, detection and solution
Integrate with Web Server
Provide different levels API to support Third-party development
more

17. Some Ideas
Plan 2
Research is focused on the association between Application Server
and other components. For example, between Application Server and
SoftBridge.
Integrate SoftBridge into Service Support Environment
The interface between Application Server and SoftSwitch (SIP, Parlay API), JAIN API
Need more research

18. END
THANKS