Performance Improvements of the UMTS Systems for Messages Transfer

Abstract

The main target of this study is to increase throughput of

the subscribers messages received at the base station. Two

channels were used for messages transfer after distribution of

network offered load between them, they are random access

channel and dedicated channel.

Two algorithms were designed to calculate messages

throughput at the base station for messages transmission over

random access channel or dedicated channel individually, the

proposed model algorithm was designed to calculate the

messages throughput at the base station for messages

transmission over the two channels after distributing the offered

load between them. 100 values for distribution percentages and

10 values of the offered load per 1.33 msec were used.

In the first case random access channel carry request for

transmission over dedicated channel, in the proposed model it

carry both requests for transmission over dedicated channel or

over itself.

The results obtained from the proposed model algorithm

were in the form of table and many graphs. The table explains

messages throughputs received at the base station for 100

distribution percentage values and 10 offered load values. Also

the table explains the optimum distribution percentage value at

3

the given network offered load to obtain maximum message

throughput at the base station. The graphs illustrates that the

proposed model throughput is higher than throughputs of

transmission over random access channel or dedicated channel

individually.

As seen from the results graphs, for all G values, total

throughput is very sensitive for X values near 0 and one.