Abstract:
UMTS network is one of the most communication network widespread in the
world , and there is continuously increasing of number of mobile users , but
increasing the number of users causes problems in the network ,and we need
ways to solve this problem, one of these ways is decreasing the coverage area of
the Node-B’s and increasing its number , this lead to several problems , one of
this problems is increase the number of soft handover, and this reason has effect
of the QoS parameters .
In this project we decided to study the relation between the soft handover
threshold and the two main parameters from QoS which are loss and delay using
OPNET simulation, to take these results during planning for any network.
According to the results that we obtained, we found that increasing soft
handover threshold , produce more connection established in the system and
more system resources are consumed , this lead to overhead of extra connection
caused by soft handover and more loss will be produced.
In case of delay, by decreasing the soft handover threshold , the value of the
throughput will increase, so that a packet queuing will be produced, and more
delay will happen over the network , in the other hand, by decreasing the soft
handover threshold the mobile will remain connect with the Node-B for time
and distance higher than it at higher threshold before begin executing the
handover algorithm , so the higher distance of connection will increase delay
between the transmitter and receiver .
Description:
no of pages 120 , 25093 , اتصالات 12/2011 , in the store
