Entwicklung und Leistungsbewertung von Koexistenz und Zusammenarbeit fördernden Verfahren in IEEE 802.11e zur Untersuchung im Spektrum konkurrierender Funknetze
The markets for various wireless communication technologies are extremely growing and have a promising performance. All these technologies operate in the same unlicensed free band of frequencies and are in a direct competition to utilize this shared resource. The IEEE 802.11e standard of Wireless Local Area Networks with Quality of Service support is the most important and complex one of the different spreading wireless network technologies. Its strict requirements to the utilization of resources to support adequate Quality of Service, in the sense of allocation lengths and point of times which can be guaranteed, lead to a severe competition in the case of overlapping 802.11e networks. Therefore the resource competition of coexisting 802.11e overlapping wireless networks has a special importance.
In this thesis this competition is modeled with the help of a game structure. A detailed analysis of the game is enabled through solutions concepts derived from the micro economies. A transfer of these suitability proven microeconomic concepts to the technical world leads to an extension of the existing analysis of coexistence scenarios. Based on the diploma thesis of Berlemann (2002) with a focus on a transfer of the 802.11e competition scenario to a game, this diploma thesis illuminates the microeconomic scope of this game model under an approach derived from the game theory. The game consists of repeated Single Stage Games which form a Multi Stage Game. The player’s outcomes namely the payoff of the Single Stage Game are analyzed in detail, enabling a definition of behaviors. In extending the scope to Multi Stage Games the payoff maximizing players are able to improve their outcome through dynamic interaction. Therefore, strategies based on the behavior are defined and evaluated. The concepts of a Nash Equilibrium, Subgame Perfection and Pareto Efficiency are used to derive non-cooperative solutions for overlapping 802.11e wireless networks.