Capacity planning of radio mesh networks based on QoS parameters

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Supervisor:
Horváth Zoltán
Department of Networked Systems and Services

The mesh network system provides services for users every time and everywhere, and it gives opportunity for high quality and fast wireless communication. However, solutions concerning its creation and installation are not fully developed. Therefore, my aim is to get to know and map the system’s features so that an integral figure is developed of its potentials and its disadvantages which might influence the exploitation of possible advantages.

The aim of my study is to explore the operation of the mesh network system. The first step is to explore the characteristic of the network nodes which are the building blocks of networks. This means the exploration of the chain affiliation of the widely used single, dual and 3-radio interfaced devices which helps to understand the advantages of using each network node type.

In the second phase of my study, the random connection of nodes is analysed. Two types of grids (square and triangular grids) are used for this purpose because their structure allows modelling the interrelations between the throughput capacity, the number of nodes and the size of the coverage area. The analysis of the parameters identifies the number of hops and nodes with which the mesh network can be reasonably created.

In the third phase of my study, based on the previously mapped unit, the potentials of two systems, a homogeneous and a hierarchical system are highlighted. In both cases, the reduction of data speed decrease is achieved by selecting the channels of node communication and the assigned relevant frequencies. The features of the two network systems are compared to see which configuration is more effective.

The last step of my study includes the observation of the system’s influence on packet loss and delay. Additionally, I also study the ways in which the above parameters can be kept on the same level by any changes to the previously defined network features. The separate analysis of each parameter shows that irrespective of the network size, the decrease of packet loss and delay can be reduced by using settings (e.g., a hierarchical system) influencing the distance of nodes and throughput capacity.

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