**4.1 Description of simulation**

The AMN (blue node in (figure23) is initially located in the area of the ACN. Here, communication between these nodes occurs with no intermediary elements.

In the 1,3th s, ACN starts to transmit TCP packets towards the AMN. They are transmitted with an average delay of 4,99s. Until the 5th s, communication flows normally. After the 5th s, the AMN starts to move towards the APAR. While this is happening, communication with the ACN is not affected until the 5,43th s, when it is out of the ACN rank. From that mentioned instant until the 6,53th s, the AMN does not receive any packets from the ACN. In the 6,27th s, the AMN locates next to APAR. Around this time (and in many other moments) certain UDP signalling is shown in the network. This signalling corresponds to the AODV signalling packets. That routing protocol takes almost 250 ms to learn the new AMN position. It is only in the 6,53rd s that the AMN resumes the session with the ACN. From that instant until the 14,6th s, communication results as follows:

Mechamisms to Provide Quality of Service on 4G New Generation Networks 21

In order to extend the different results obtained in the simulations, the function (figure27) shows the behavior for different scenarios of simulation. With this functions could predict what happens with the metrics (Delay, Throughput, Send and Received Packets) against quantity of number of nodes. In this manner we could predict what happen when the

**Delay, Throughput, Send Packets and Received Packets Vs** 

**Nodes** Delay(ms)

Throughput(Kbps) Send Packets

Fig. 27. The figure show the functions Delay, Throughput, Send and Received Packets an

The figure 28 shows the results of the following metrics obtained of the table 2. In this manner can visualize the behavior of delay, throughput, send and received packets with

**Jitter and Lost Packets**

15 20 25 30 35 40 45 **Nodes**

Jitter(ms) Lost Packets (%)

0 10 20 **Nodes** 30 40 50

number of nodes and the flow are traffic is increased.

y = 0.0517x2 - 5.1721x + 397.88

y = -0.3229x2 + 7.1143x + 587.29

y = -70.69ln(x) + 342.12

y = -13.15x + 900.36

Number nodes

0

200

400

600

800

different number nodes.

0

50

100

150

Fig. 28. Jitter and Lost Packets vs Number nodes
