networks & systems laboratory> research> current projects> mobile peer-to-peer ad-hoc network

Mobile Peer-to-Peer Ad-hoc Network
Smart Internet Technology Research Group

Aims

- Find an effective routing method in mobile ad-hoc wireless networks

- Find an information discovery and searching technique in middleware

- Construct peer-to-peer resource sharing based on fragile and flexible ad-hoc network environment

Introduction

- The mobile peer-to-peer applications based on ad-hoc wireless networks invoke much attention under strong increasing demand for file-sharing in mobile users

- Both ad-hoc networking and peer-to-peer computing face similar problems in namely discovery, routing, information dissemination and resource sharing.

- The purpose of our research is how to construct a kind of hardware and software model to realize the effective combination of the peer-to-peer and ad-hoc network.

- An example in the following environment:


*click image to enlarge

The Problems

- Nodes in ad-hoc networks always keep changing their physical location or disappear rapidly and break up the old relations.

- How to search the node including the information needed.

- How to route to the node and construct the connection under the complex ad-hoc

End-address Route Aggregation

- The routing policy can be programmable so that the application layer overlay network can then tune itself to current network conditions to improve the whole system.

- There are three functional nodes: helper nodes, Aggregation nodes, Forward Nodes

- A kind of application address involves aggregation nodes in order to internally locate the destination node according to actual IP address.

- Each aggregation node must maintain the list of the tuples <application number & IP address>

Content Aggregation

- This is a similar aggregation as the above one except that it substitutes “content” for the “IP address”.

- This method means a node can move through the network but as long as it can reach the aggregation node to advertise its content, the problem “Where it is” in the end-address scheme is no longer important.



*click image to enlarge

A Meta-data XML Middleware

- In order to enhance application awareness on the status of the surrounding resources such as the distance, latency, the number of nodes, remaining battery life, a meta-data XML middleware is introduced.

- It is a kind of technique of reflection and context-awareness which can also decide how to construct and tear down the aggregation groups.

Using XML languages in Middleware

<resource name =“battery”>

<status value=“high”>

<resource name =“memory”>

<status value=x/>

</resource>

My Future Work

- Search for a more effective method between the application layer and network layer in peer-to-peer ad-hoc network

- Research on the realization possibility

- Construct a simulation network model

- Bluetooth peer-to-peer network environment

References

1. Computer Science & Engineering Department of University of Buffalo: Protocols of Ad Hoc Network

2. Cathal McDaid: Bluetooth Mobility & Roaming

3. Northstream: Bluetooth Opportunities and Threats from a Market Perspective

4. Mario Joa-Ng and I-Tai Lu: A peer-to-Peer Zone-Based Two-Level Link State Routing for Mobile Ad Hoc Networks

5. Antony Rowstron and Peter Druschel: Pastry: Scalable, decentralized object location and routing for large-scale peer-to-peer systems

6. Richard Gold and Cecilia mascolo: Use of Context-Awareness in Mobile Peer-to-Peer Networks

7. Gemma Paulo: The Connected Couch potato: Living it Up in the Wireless Home

8. Anne Zieger: Developing implementation that lets all points wireless get along

9. Scott Tilley and Mohan DeSouza: Spreading Knowledge About gnutella: a Case Study in Understanding Net-Centric Applications

10. Manoj Parameswaran, Anjana Susarla and Andrew Whinston: P2P Networking: An Information-Sharing Alternative

11. David A. Maltz, Josh Broch and David B. Johnson: Lessons from a full-Scall Multihop Wireless Ad Hoc Network Testbed

12. Christian Tschudin, Henrik Lundgren and Henrik Gulbrandsen: Active Routing for Ad Hoc Networks

13. Philippe Charas: Peer-to-Peer Mobile Network Architecture

14. Richard Gold: Self-Organizing Route Aggregation for Active Ad-Hoc Networks

Contact

Annie Ding
Professor David Everitt

 
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