A performance evaluation of various solutions for the signaling MAC protocols has to be carried out in network models with varying traffic conditions. Thus, it is possible to investigate features of the MAC protocols under different network load conditions. To vary the network load, the number of network stations is increased from 50 to 500. This results in a minimum average network load of 125 kbps and a maximum of 1.25 Mbps, in accordance with the simple traffic models presented in Sec. 6.2.3. Another approach to the increase of the network load is a variation of offered traffic for individual network stations; for example, the offered network load of individual network stations can be varied from 2.5 to 25 kbps for a constant number of stations, which results in the same common offered network load, as in the first case. If the number of stations remains constant, the interarrival times of the user packets has to be reduced to increase the network load. That means, for a network load of 1.25 Mbps and 50 network stations, the interarrival time has to be set to 480 ms in the simple traffic model with rare requests and to 96 ms in the model with frequent requests. So, the interarrival times would become too short and the representation of a realistic WWW traffic scenario disappears. On the other hand, the average intensity of the transmission requests is equal in both cases – a variable and a fixed number of the network stations – if the common network load remains the same. A transmission request is made only after a previous packet transmission is successfully completed (Sec. 6.2.2). On the other hand, if the number of network stations is increased, the number of uncorrelated sources in the network becomes higher. Accordingly, the common number of transmission requests is higher, which is not the case if the number of network stations is constant. Therefore, the increasing number of network stations also presents a worse case for the consideration of the reservation MAC protocols with per-packet reservation domain and is chosen to be used in further investigations