QoS-Driven Wireless BroQoS-Driven Wireless Broadband Home Networkinadband Home Networking Based on Multihop Wirg Based on Multihop Wir

eless Mesh Networkseless Mesh Networks

Authors : B. Park, W. Lee, S. Ahn, and SunAuthors : B. Park, W. Lee, S. Ahn, and Sungjoon Ahngjoon Ahn

Published : IEEE transactions on ConsumePublished : IEEE transactions on Consumer Electronics Novermber 2006r Electronics Novermber 2006

OutlinesOutlines

What is Home NetworkingWhat is Home Networking Why Home Networking must base on MultihoWhy Home Networking must base on Multiho

p Wireless Mesh Networksp Wireless Mesh Networks GoalsGoals Home Mesh Router Discovery and SelectionHome Mesh Router Discovery and Selection Performance EvaluationPerformance Evaluation ConclusionConclusion

What is Home NetworkingWhat is Home Networking

A home network interconnects networked consumer electronic (CE) devices and systems, and any available content such as music, video or data.

Home environments require a cost-effective network with minimum network infrastructure.

They should be simple to use, easily configurable and easily manageable.

they are easier to install in existing houses and they also give cost efficiency in deployment.

Why Home Networking must base oWhy Home Networking must base on Multihop Wireless Mesh Networksn Multihop Wireless Mesh Networks

WPANs have WPANs have limited available data ratelimited available data rate in den in dense nodes environment.se nodes environment.

WLANs always transfer data WLANs always transfer data through network through network infrastructureinfrastructure even local traffic. even local traffic.

The CEs, such as TVs, media center device, suThe CEs, such as TVs, media center device, supplied power by line-power and can play routepplied power by line-power and can play routers.rs.

802.11s Mesh networks function 802.11s Mesh networks function component architecturecomponent architecture

The system modelThe system model

Mesh routers implementationMesh routers implementation

GoalsGoals

Supports multihop wireless networking to impSupports multihop wireless networking to improve coverage and reduce installation costs.rove coverage and reduce installation costs.

Allow packets to travel along path with less traAllow packets to travel along path with less traffic.ffic.

Home Mesh Router Discovery and SHome Mesh Router Discovery and Selectionelection

Network environmentNetwork environment Only a few nodes will move at any given point in t

ime and the speed of movement is very limited. Most devices have a fixed position in the house

Distance between devices is limited. The signal range of a node is not much less than the size of the house.

MeshRTs share other MeshRT’s information such as the offered load and the remaining capacity

Scoped-Proactive Home Mesh Router Discovery

Wireless home mesh routers (MeshRTs) periodically announce their presence in a home network by broadcasting Mesh Router Advertisement (MRA) messages containing their information at every periodic interval.

Prevent the advertisements from being flooded over n-hop neighborhood using the time-to-live (TTL) field

Scoped-Proactive Home Mesh Router Discovery

This range determines the MeshRT’s discovery scope, called the proactive area.

The proactive area is dynamically adjusted by the offered load. The change of the proactive area is derived using the expected load of the area. The offered load in a MeshRT is given by

Home Mesh Router Selection with a QoS-metric

Home Mesh Router Selection with a QoS-metric

Performance EvaluationPerformance Evaluation

NS2NS2

Performance EvaluationPerformance Evaluation

Performance EvaluationPerformance Evaluation

Performance EvaluationPerformance Evaluation

Performance EvaluationPerformance Evaluation

Performance EvaluationPerformance Evaluation

Performance EvaluationPerformance Evaluation

Performance EvaluationPerformance Evaluation

ConclusionsConclusions

proposed a scoped-proactive MseshRT discovery scheme and a QoS-driven diversion MeshRT selection mechanism providing load-balancing

Dynamically adjusts the proactive area based on the offered load

allows packets to travel along paths with less traffic