designing a peer to peer wireless network confederation n.
Skip this Video
Download Presentation
Designing a Peer-to-Peer Wireless Network Confederation

Loading in 2 Seconds...

play fullscreen
1 / 1

Designing a Peer-to-Peer Wireless Network Confederation - PowerPoint PPT Presentation

  • Uploaded on

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
Download Presentation

PowerPoint Slideshow about 'Designing a Peer-to-Peer Wireless Network Confederation' - hiroko-boyd

Download Now An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
designing a peer to peer wireless network confederation

Abstract:We make the case for a Global Confederation of Peer-to-Peer WLANs. This P2P Wireless Network Confederation (P2PWNC) is a community of administrative domains that offer wireless Internet access to each other’s registered users. Household hotspots represent the simplest form of P2PWNC domains. In contrast to centralized WISP roaming associations, the P2PWNC is a pure P2P community. Domains participating in the P2PWNC make independent decisions concerning the amount of resources that they contribute. Only flexible rules on reciprocity guide their local policies.

Designing a Peer-to-Peer Wireless Network Confederation

1 What is a P2PWNC?

2 P2PWNC Distinctive Characteristics

A Peer-to-Peer Wireless Network Confederation is a community of WLAN Domains that offer Internet access to each other's users.

  • Decentralization
    • Domains participating in the P2PWNC enjoy autonomy and independence from central authorities (it is a pure P2P system)
  • Low complexity
    • The P2PWNC is easy to join (minimal administrative overhead)
    • Similar to joining a P2P file-sharing network
    • Simplest case: a hotspot administrator only installs P2PWNC software
  • Rules on reciprocity: contribute in order to consume, or else…
    • Rules guide a domain’s bandwidth sharing policy and battle “free-riding” (i.e. the effect of having domains that do not share resources while their own users consume from other domains when they roam)
















Household hotspots (such as AD ‘White’ here) represent the simplest form of P2PWNC domains.

AD: Administrative Domain

AP: WLAN Access Point

: User

WLAN view

P2P view

3 P2PWNC Terminology

4 Usage Scenario



  • 1. User visits peer domain
  • 2. Activates device
      • Any web-capable and WLAN-enabled terminal
  • 3. Uses P2PWNC ID to login
      • Home domain is contacted for user credential check
      • Home or visited domain may not allow request to proceed
      • Only if both domains agree will the user be offered service
  • 4. User accesses the Internet
      • Visited domain controls the user’s access rate
  • 5. User leaves or turns off device
      • P2PWNC distributed accounting records are updated…
      • … the records will be used as input in future domain decisions



Elias C. Efstathiou and George C. Polyzos

Department of Computer Science

Athens University of Economics and Business

Peers  Administrative Domains

Home Domain Consuming Peer

Visited Domain Providing Peer

Registered Users: Unique P2PWNC ID ( username@home_domain_name )

6 Prototype Administrator Console

5 The P2PWNC Software

  • Easy for hotspot administrators to install
  • Modules include:
    • Naming service
      • Supports logical, location-independent domain names (not just ‘’ but also ‘The_Smith_family_Bonn_hotspot’)
    • Authentication
      • Maintains a database of locally registered users and their passwords
    • Traffic policing
      • Logs and shapes visitor ingress and egress Internet traffic
    • Distributed accounting
      • The P2PWNC uses Distributed Hashtable technology to store usage accounting data in other P2PWNC peers while preserving security
  • - P2PWNC software runs on Linux 2.4
  • It includes WLAN control functionality
  • All-in-one “box” version
  • will include:
    • - WLAN router
    • - DSL modem
    • - P2PWNC software

8 Summary

7 Open Issues

  • We proposed a novel P2P application as an alternative to WLAN roaming schemes and we implemented a working prototype.
  • We are currently working on
    • The P2PWNC Anonymity and Untraceability architecture
    • More efficient P2PWNC community rules based on economic models
  • Keep in touch
    • - -
    • (IST Project MMAPPS - Market Management of Peer-to-Peer Services)
  • 1. Offline domains
      • A user’s home domain may be offline (no consuming peer available to speak on the user’s behalf). Could another peer act as the peer’s home?
  • 2. The requirement for lightweight client devices
      • Special software may be required on the client device in order to verify received service levels authoritatively. Who else can independently observe the provider?
  • 3. Hide all complexity from administrators
      • Tune local contribution policy automatically (by weighing benefits and costs)
      • …while insuring the peer’s ability to consume as much as possible
      • Find optimal operating point