Design and Implementation of QoS Provisioning for Dual-Mode Handheld
Date Issued
2007
Date
2007
Author(s)
Chen, Jie-Min
DOI
en-US
Abstract
Owing to the rapid growth of Wireless Local Area Network (WLAN) and Voice over Internet Protocol (VoIP), dual-mode handheld which is embedded with Wi-Fi chip is not only used for accessing the Internet via WLAN. A new killer application which is Voice over WLAN (VoWLAN) is gradually favored by people.
The major advantages of VoWLAN are as follows.
1.Save telecommunication bills
2.Expand the coverage of telecommunication
3.Save the cost of telecommunication deployment
For the above reasons, this application has attracted much interest from academia and industry. However, there are still many constrains in this application. Among these constrains, the provision of Quality of Service (QoS) is considered as the most emergent one.
Unlike cellular networks where dedicated channels are assigned to voice traffic, voice packets in WLANs are multiplexed with best effort traffic. Therefore, quality of voice in WLANs is much worse than cellular networks. In this thesis, we proposed a mechanism to solve this problem. The mechanism is implemented and verified practicable at the same time. We also proved that this mechanism is simple and easy for implementation by the result of verification.
Subjects
雙網手機
無線網路
品質服務保證
網路電話
Dual-Mode Handheld
IEEE 802.11i
QoS
VoIP
VoWLAN
Type
thesis
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