B. Simulation Result
The network performances were evaluated in terms of
network throughput, delivery delay and lastly network jitter.
Network throughput is measured in kbits per second (kbits/s or
kbps). The network throughput is the sum of the data rates that
are delivered to all eNB nodes or base station in the network.
Meanwhile the network deliver delay is the delivery delay rate
when data are being sent to base station during the
communication. If the delivery delay rate is high it means that
the network is congested. A jitter mean is the variation in the
time between packets arriving, caused by network congestion,
timing drift, or route changes. So the network delivery delay
plays an important role to determine the network jitter as the
lower delivery delay rate, less network jitter occurs. There are
two part of the simulation. The first part is where the value of
Hys is fixed at 4dB while TTT values are varies and the
second part was the vice versa of the first part.
In the first phase of HO evaluation, the Hys parameter value
is fixed and the values of TTT are set at [480, 320, 256, 160,
80 and 40] milliseconds and the network throughput as shown
in Fig 8. Based on the graph, the network throughput starts to
increase significantly from the benchmarking point at each
base station perspective. Even though there are no increment at
eNB1 but there are tremendous increment seen at eNB2 and
eNB3. For starting, all UEs were attached at eNB1 makes the
network throughput at eNB1 is higher compared to eNB2 and
eNB3. As the UE performed handover with their respectively
base station, the traffic at eNB2 and eNB3 are less congested
and gives higher network performances.