Masaki Aida

A Study of Improving Fairness Among Flows in Ad Hoc Networks

By development and the spread of a wireless technology,the mobile ad hoc network (Manet) that can be easily constructed only with mobile nodes is getting much attention.However, it is difficult to control the performance of the entire network appropriately, as a network consists of individual communication nodes operating autonomously and there is no device that controls the entire network. Recently, a large amount of research have investigated the performance of TCP in Manet,and noted the problem of leading to a larger degree of unfairness.We have proposed diffusion-type flow control (DFC) as a solution for the extremely time-sensitive flow control required for high-speed“wired” networks. In this paper, we apply the approach of DFC to Manet, in which the exchange of information across the entire network is limited, and show a wireless traffic control scheme improving the fairness among TCP flows.

Diffusion model for mobile multimedia traffic based on population process

This paper investigates population of active users in a cell and proposes a traffic model for mobile multimedia networks. This model describes a population process of active users in a cell in diffusion model, and its characteristics include self-similarity and activity of mobility. We also made an evaluation of network performance by using simulation, in order to show that characteristics of the proposed traffic model have impact upon planning and designing networks.