Improving the quality of voice over Wireless networks
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Date
2006
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Publisher
UMT.Lahore
Abstract
WLAN is expected to be an important connection form in many business areas.
Market is expected to grow as the benefits of WLAN are recognized. So far WLAN have
been installed primarily to ware houses and resellers, but having new installations in
different kinds of schools. The future large markets are estimated to be in health care,
educational institutes and corporate offices. In business environment meeting and public
areas and side offices would be ideal for WLAN.
After basic information of WLAN we discuss the modes and standards of WLAN
in detail. The main focus of our project was to improve the quality of voice. The global
communications transformation is in full swing. Packet-switched technology has moved
from data-only applications into the heart of the network to take up the functions of
traditional circuit-switched equipment. While the lower cost of packet-switched networks
initially drove this change, the improving quality and reliability of voice over these
networks is speeding integration of voice and data services. Consequently, the
overwhelming majority of voice networks in service today will be replaced by packet
infrastructure within the next decade. Service providers and corporate organizations,
therefore, must develop a plan to migrate their voice services from circuit-switched
networks to packet-switched networks to ensure their future success and survival.
The economics of voice and data integration coupled with advancements in
voice/packet technology have ushered in a new networking environment. This new
environment promises cost savings, flexibility, and enhanced applications for improved
productivity and efficiency. Recent enhancements and developments in hardware,
software, and networking protocol design fuel this new converged infrastructure. These
technologies have yielded a new breed of networking products and with them new
management and operational challenges.
Telephony was created more than 100 years ago. The basic analog telephone and
the supporting network have slowly evolved into large PBX systems and digital networks
utilizing fiber transmission facilities.
The hardware and operating system requirements to support the Wireless QoS
Gateway are then presented and discussed, followed by an analysis of the functional
requirements for the implementation of the Wireless QoS Gateway. Charging models to
address the requirements of high-speed access networks and wireless access networks to
support mobile users sessions. A proposed architecture to provide enhanced configurable
QoS for the wireless users in the wireless access network is presented. This uses
bandwidth division and priority scheduling, based on the network user's requests and the
AAA policies in the network, and is run on the Wireless QoS Gateway. One design aim
of the Wireless QoS Gateway is to implement the QoS architecture without any software
modifications for the wireless clients, i.e. no client software required to install and
maintain.