Algebraische Topologie. Eine Einfuhrung, 2. Auflage by Ralph Stocker, Heiner Zieschang

By Ralph Stocker, Heiner Zieschang

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This location was chosen as it is a typical rural environment with obstacles such as trees, hills and buildings that the mesh network must route around. Additionally it is close to CRCnet which means the network is easy to access. 11b links were setup so that the network could be checked before the mesh framework was tested. This step did not go as smoothly as was planned. 11b point to point links, they have mostly been from hilltop to hilltop rather than from roof to roof. On average it took twice as long to setup the links in this testbed network as it would to setup a normal point to point link on CRCnet.

This protocol creates a mesh network from a set of wireless nodes and is intended for use in rural areas. A distinguishing feature of this mesh network is the use of multiple wireless interfaces, each attached to a directional antenna. The mesh protocol has been implemented inside a framework developed by this project. This framework is modular to allow different implementations for parts of the project to be quickly inserted. This framework, and the mesh protocol, have been successfully used on two test bed mesh networks.

Using one of Pythons built in modules a web server that returned a single page describing the state of the network was built in under thirty minutes. To implement a web server and integrate it with the existing code base would have taken at least a day in a lower level language such as C. Despite the large number of modules that are present in the standard Python distribution there were some notable tasks a mesh node needs to perform that Python is not able to do. Fortunately Python has a very strong modular architecture allowing small snippets of C code to be easily inserting into the Python framework to extend its functionality.

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