The aim of this paper is to propose a methodology to apply to an econometric model which could be the basis for generating a congestion control strategy in a LAN network.Using time series as analysis tool, ARIMA model (Autoregressive Integrated Moving Average) is used in an econometric model, and this same analysis is transferred to the mechanism of congestion control of the TCP protocol.As a result, a transmission rate reduction parameter is generated in a test environment, where congestion control strategy is applied.It is shown that this procedure works and its application could be further expanded in data networks.