Performance Studies of Multimedia Traffic in CDMA Cellular Network
The current generation of wireless cellular network is mostly used for voice communication. Although data services such as short message services (SMS) are available, voice communication still takes precedence. However, in the near future, it is anticipated that wireless communication is expected...
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Main Author: | |
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Format: | Thesis |
Language: | English English |
Published: |
1999
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Subjects: | |
Online Access: | http://psasir.upm.edu.my/id/eprint/9644/1/FSKTM_1999_14_A.pdf |
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Summary: | The current generation of wireless cellular network is mostly used for voice
communication. Although data services such as short message services (SMS) are
available, voice communication still takes precedence. However, in the near
future, it is anticipated that wireless communication is expected to handle
multimedia traffic that is currently available on land networks. Multimedia traffic
includes video services such as real time video and audio, voice services and data
services similar to the ones available in the Internet. The cellular network carrying
multimedia traffic is analysed in a single cell where Code Division Multiple
Access (CDMA) protocol is used for users to access the network simultaneously.
The study is analysed for the reverse link communication, i. e., communication
between the user and the base station. CDMA is used because of its merits in
minimising the effect of interference, increasing cell capacity and high security
features compared to other access technologies. The model inputs include co-
channel interference, signal to noise ratio, bit error rate requirements, number of users, the channel access priority and threshold. Suitable assumptions to enable
simulation are made. The model is simulated to see the impact of complementing
data traffic along with voice and video traffic. The model is also simulated for
synchronous transmission and asynchronous transmission of packets. The results
shows that data traffic can be successfully complemented along with voice and
video traffic without significantly degrading voice and video delay. Data traffic
can tolerate delay but is loss sensitive. Data traffic delay can be used without
suffering any loss, even by reducing the data access priority. The model also
compared the effects of synchronous and asynchronous transmission.
Synchronous transmission indicated an overhead in packet delay compared to
asynchronous transmission. It is concluded from the work that voice, video and
data traffic can be served in a cell simultaneously with asynchronous transmission.
A higher bandwidth can assure a higher number of multimedia users in a
asynchronous CDMA cellular network. The model will serve as a useful design
tool. |
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