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TANGO  TANGO ALTERNATE NETWORK GRAPH ORGANIZER

TANGO  TANGO ALTERNATE NETWORK GRAPH ORGANIZER. Olof Hellqvist <olof.hellqvist@gmail.com> Zak Blacher <zblach@gmail.com>. Introduction Net-X System eXtensions OLSRd Overview Channel Changer (CHACHA) Tango Overview Server Protocol Client Demo Future work Thanks / Questions. Agenda.

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TANGO  TANGO ALTERNATE NETWORK GRAPH ORGANIZER

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  1. TANGO TANGO ALTERNATE NETWORK GRAPH ORGANIZER Olof Hellqvist <olof.hellqvist@gmail.com> Zak Blacher <zblach@gmail.com>

  2. Introduction • Net-X System eXtensions • OLSRd Overview • Channel Changer (CHACHA) • Tango • Overview • Server • Protocol • Client • Demo • Future work • Thanks / Questions Agenda

  3. Introduction Project description: Our assignment was to build a centralized channel assignment framework for wireless mesh networks that interacted with the current distributed channel assignment plugin for olsr CHACHA

  4. Net-X System eXtensions • Net-X is a Linux-based software framework for multi-channel/multi-radio wireless mesh networks • Consist of • A routing layer • A channel abstraction layer • A modified Network interface card (NIC) driver • Layer 2.5

  5. OLSRd Overview • Implements Optimized Link State Routing Protocol  • Deployed on large scale ad-hoc networks • i.e. mesh networks  • NOT for sensor networks • Proactive Protocol - distributes routing information in advance.

  6. CHAnnel CHAnger • Distributed algorithm for assigning channel for the fixed interface. • Replaces the HelloServer in the Optimized Link State Routing Protocol.  • The HelloServer balance the use of the channels for the fixed interfaces on the nodes in the mesh network. • Broadcasts channel information to all one- and two- hop neighbours.

  7. TANGO Overview • Tango Alternate Network Graph Organizer  • Centralized Channel Assignment Framework For Wireless Mesh Networks

  8. TANGO Server • Extendable C++ implementation • Reads and santity checks current configuration stored in libconfig configuration syntax.

  9. TANGO Server configuration file • Tango servers utilizes libconfig => configuration file is written in libconfig syntax config.cfg: version = "1.0"; tango = ({     ip = "192.168.30.7";     channel="40"; }, {     ip = "192.168.30.21";     channel="64"; }, {     ip = "192.168.30.22";     channel="44"; }); ip = "192.168.31.200"; port = 50000; ###eof

  10. TANGO Protocol • TCP based clear text protocol • Clients pull the there current fixed channel • The server will return either the new fixed channel or -1 depending on if the node exist in the current configuration

  11. TANGO Client • Extension of CHACHA (replaced least_used_channel) • Periodically updates the channel for the fixed interface. (polling)

  12. DEMO

  13. Future work • Expand tango server with routing algorithm (they can either generate configuration files or be embedded in the server). • Replace the TCP communication with olsr-messages • Add feedback information from the client in order to make more a intelligent routing intelligent channel choice depending on the nodes environment. • Expand the configuration options of the server (e.g. channels different standards).

  14. for listening

  15. ?

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