Middleware Framework for Disconnection Tolerant Mobile Application Services
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Middleware Framework for Disconnection Tolerant Mobile Application Services. Access network (Wireless). Core network (Wired). Global IP network (Wired). Server-3. Services. Services. Application. Server-2. Services. Server-1. Middleware. Middleware. Services. Mobile device.

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Middleware Framework for Disconnection Tolerant Mobile Application Services

Access network

(Wireless)

Core network

(Wired)

Global IP network

(Wired)

Server-3

Services

Services

Application

Server-2

Services

Server-1

Middleware

Middleware

Services

Mobile device

Servers

Mobile Intelligent server

R

S

R

S

Send Buffer

Receive Buffer

Sending Buffer

Receiving Buffer

BS_1

BS_2

User’s path

(d)

(c)

(b)

(a)

Starting point for getting a signal strength from BS_1

Ending point for getting a signal strength from BS_1

Starting point for getting a signal strength from BS_2

Ending point for getting a signal strength from BS_2

BS : Base Station

Consider disconnection tolerant mobile application services

Prepare losing the connection

Recover network connection, Resume mobile application service

Signal

Strength

(d)

(c)

(b)

(a)

User’s movement

Sangwhan Cha, Weichang Du,.Bernd J. Kurz

Introduction

Middleware Framework Design

Mobile services are prone to failures caused by the disruption of an

active wireless access network connection due to the user’s movement

to other networks or signal blocking (shadowing).

Thus, proper mechanisms for disconnection tolerant mobile application

services are needed. we propose a middleware framework that

transparently performs required functionality for users in order to

provide continuous mobile services in case of network disruption.

Such middleware framework provides an effective disconnection tolerant

mobile application service.

SM : Service Manager

CM : Connection Manager

RM : Resource Manager

CH : Context Handler

Mobile Intelligent Server

Mobile Device

Keeping the mobile service run

Play the mobile service

Control service

:SM

:CH

Analyze context

Control connection

Obtain the service type

:CM

:SM

--Refer the policy

Control context

:CH

Monitor the SS

:SM

Readjust mobile service

:CM

Control resource

:RM

:CM

Detect the SS weaker

Recovering the network connection

Preparing the connection lost

Server

:RM

:SM

Reserve more data

Restore service state

Provide mobile services

:SM

Save service state

:SM

Resume mobile service

Research Problem

:CM

Communication

Detect other networks

Solution

MIS is located in the fixed

network and has reliable

connections to

the application server.

Figures shows a network disruption between base station 1 and base

station 2 when a mobile device moves from point (a) to point (d).

Thus, mobile multimedia application services cannot be provided

properly during network disconnection from point (b) to point (c).

When the disruption

in the access network occurs,

the middleware on the mobile

device will try to make the mobile application run as long as possible with limited

resources until reconnection,

Real-World Applications

  • Current Existing Applications

    • Stored multimedia

    • : Mobile VOD, Mobile IPTV

    • Real time Multimedia

    • : Mobile Video Call

    • : Mobile Conference

    • : Mobile streaming multimedia

    • (Watch child care, Watch house

    • ,…etc.)

    • Others

    • : Mobile Game,

    • : VR (Virtual Reality) application

    • : Etc.

  • Future Applications

    • Real time Multimedia

      : Mobile Cloud computing

    • Virtual Reality (VR)

      :Mobile Training

      :Mobile Education

      :Mobile Medical Application

      :Mobile E-Commerce

      :Mobile Entertainment

      :Mobile Manufacturing

Appropriate mechanisms are needed for preparing a persistent and

resumable mobile service before the current wireless access network

is lost, making sure that a mobile application continues to run on the

mobile device, until reconnection occurs through another detected

wireless network, and recovering the execution of the mobile service

after the wireless access network reconnection.

Middleware Architecture Overview

Service

Application

Service

SM : Service Manager

CH : Context Handler

CM : Connection Manager

RM : Resource Manager

Middleware

SM

CH

SM

CH

Data

CM

CM

RM

RM

  • For more information, Refer to the paper :

    S. Cha, W. Du, and B. Kurz, “Middleware framework for disconnection tolerant mobile application services” in proceedings of

    the 10th communication networks and services research conference (CNSR 2010), Montreal, May, 2010.

Vendor Platform

Vendor Platform

Vendor Platform

Hardware Resource

Hardware Resource

Hardware Resource

Mobile Device

Mobile Intelligent Server

Sever

Communication Networks and Services Research (CNSR)

This research is supported and funded through CNSR by Bell / Aliant and ACOA by an AIF research contract.


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