Application-Aware Self-Optimization of Wireless Mesh Networks with - - PowerPoint PPT Presentation

Application-Aware Self-Optimization

• f Wireless Mesh Networks with

AquareYoum and DES-SERT

Barbara Staehle, Florian Wamser, Sebastian Deschner, Andreas Blenk, Dirk Staehle

Julius-Maximilians-Universität Würzburg

Oliver Hahm, Nicolai Schmittberger, Mesut Günes

Freie Universität Berlin

2 Application-Aware Self-Optimization of Wireless Mesh Networks with AquareYoum and DES-SERT

Cisco Visual Networking Index 2010

 Increasing heterogeneity on application layer  Increasingly different application specific QoS requirements

Application and QoE Aware RM necessary for ensuring user satisfaction  YouTube and WMNs as an example

AquareYoum

Application and Quality of Experience Aware Resource Management for YouTube in Wireless Mesh Networks

3 Application-Aware Self-Optimization of Wireless Mesh Networks with AquareYoum and DES-SERT

QoE-based RRM

 Main idea

• QoE assessment at the edge of the network
• QoE based RRM decision in the network

 Advantage

Dynamic resource adaptation to application quality feedback

 Problem

QoE prediction necessary for avoiding QoE degradations

 Solution: Monitor application comfort

• AC = application usage and condition
• allows to predict QoE degradation

Measure QoE Report QoE Report QoE

Network

Measure QoE Utilize QoE for RM Decisions

4 Application-Aware Self-Optimization of Wireless Mesh Networks with AquareYoum and DES-SERT

Application Monitor Mesh Advisor Application Comfort Application Monitor Application Comfort Utilization Utilization Mesh Monitor



Detects application



Monitors AC



Sends current AC to mesh advisor  Monitors available resources  Sends current resource status to mesh advisor  Obtains information

• n network

resources and AC  Decides upon application specific RM Tool

Mesh Monitor

The AquareYoum Architecture

Resource Management Tools

 Channel assignment  Traffic shaping  Dynamic gateway selection  Routing path selection  …  AC = Application usage and condition  Allows QoE prediction  YouTube AC = buffered playtime

5 Application-Aware Self-Optimization of Wireless Mesh Networks with AquareYoum and DES-SERT

DES-Testbed

 Properties of the DES-Testbed

• Persistent testbed
• >100 hybrid nodes
• Spanning ≥3 buildings
• Wireless mesh nodes
• Wireless sensor nodes
• Indoor nodes
• Outdoor nodes
• Mobile nodes

6 Application-Aware Self-Optimization of Wireless Mesh Networks with AquareYoum and DES-SERT

DES-SERT

Distributed Embedded Systems - Simple and Extensible Routing Framework for Testbeds

• ANSI-C library
• Underlay routing in user space
• Routing based on IP or MAC addresses
• Multiplexing and piggybacking of routing information
• Periodic task execution
• Runtime configuration and monitoring
• Command line interface
• SNMP via AgentX
• Logging (file, syslog, ring buffer, …)
• Monitor interface support

7 Application-Aware Self-Optimization of Wireless Mesh Networks with AquareYoum and DES-SERT

Interaction of Components

Bandwidth

• f YouTube

path too small?

Routing path rating

Move to X and provide additional hop Routing path status β too small

Application Monitor YoMo Mesh Advisor Dory RM Tool Forrest

X = best position for higher bandwidth hop Routing path status Routing path status Monitor buffered playtime β Move to position X yes no

Alert!

D E S

• S

E R T

Decision about RM actions YouTube buffered playtime β monitoring Mobile mesh node Routing path quality

8 Application-Aware Self-Optimization of Wireless Mesh Networks with AquareYoum and DES-SERT

Demo Setup



The AquareYoum Architecture supports the self- healing properties of the DES-SERT framework



The two ideas complement one another to allow for a successful YouTube playback

1

A node failure happens.

2

The routing protocol replaces the broken route.

3

The bandwidth of the new route is not sufficient, β falls below the alarm threshold, YoMo alarms Dory.

4

Dory triggers Forrest to move.

5

Forrest moves to the place

• f the broken node to

provide an additional hop.

6

The routing protocol moves the flow to the new route

Client displaying a YouTube video 1 2 4 5 3 6