**5.2 Scalability**

In the same way, we simulated with 20 and 30 nodes. See figures 33 and 34.

Mechamisms to Provide Quality of Service on 4G New Generation Networks 27

the AMN communicates directly with the ACN, that is to say, traffic does not pass through the intermediate nodes. Then we can see a blank space, which corresponds to the time when the AMN moves towards the PAR/LER1 and does not send traffic to the ACN. Beyond the time t = 10s we can observe that the experienced delay increases, at this time the AMN is fully in PAR/LER1 zone. A few seconds later we see a growing tendency of the delay until reaching a blank space, this behavior corresponds to the time when the AMN performs the transfer from the PAR/LER1 to the NAR/LER2 between times t = 16s and t = 20s . Finally the delay adopts a regular behavior close to the 350ms, which is maintained until the end of

the simulation. The average delay was 224.521ms.

Fig. 35. Illustrates the behaviour of the delay vs. time in the simulation

The (figure36) illustrates the jitter behavior as time in the simulation.

the average jitter during the simulation was 15.84ms.

As it can be seen in figure 36, the jitter has a similar behavior to the delay during the first 10s of simulation, in the sense that both present the lowest values throughout the simulation in this range, but after the AMN moves towards the PAR/LER1 a huge peak of about 650ms is registered, this corresponds with the packet that experiences more than 700ms in delay in figure 80. After this, the jitter is stabilized below 50ms when the AMN is in the ANAR/LER2 zone (after t = 20s) and below 100ms when the AMN is in the APAR/LER1 zone (between the 11s and 18s or so). Additionally it is noted that the transfer that takes place near the instant t = 16s has no significant effects on the experienced fluctuation. Finally

**5.2.2 Analysis of jitter** 

Fig. 33. Scenario with 20 nodes

Fig. 34. Scenario with 30 nodes
