Authors:
Shin-Jer Yang
;
Li-Chih Lin
and
Yung-Ming Hsieh
Affiliation:
Soochow University, Taiwan
Keyword(s):
VoIP, HSDPA, HARQ, QPF (QoS-based Proportional Fairness), PF (Proportional Fairness).
Related
Ontology
Subjects/Areas/Topics:
Enterprise Information Systems
;
Internet Systems Performance
;
Software Agents and Internet Computing
;
Telecommunications
;
Wireless and Mobile Computing
;
Wireless and Mobile Technologies
;
Wireless Information Networks and Systems
Abstract:
IMS can provide full IP technology platform which combines information and communications technologies to achieve the objectives of integrated multimedia service. In IMS, SIP is introduced to transmit session control signal. Currently, the session transmission time of SIP is affected by wireless channel bandwidth, Frame Error Rate (FER), message exchange volume, retransmission mechanism and other factors. In order to effectively reduce the delay time for session transmission, we did revise conventional MAC-hs scheduling algorithm (i.e. PF) and propose QoS-based Proportional Fairness algorithm, called QPF, to enhance the session setup on SIP with channel performance of wireless communication. We perform simulations with comparisons on two KPIs of Delay and Throughput between PF and QPF schemes, by using NS-2 software tool under various multimedia applications, such as VoIP, VoD and Web. The simulation results indicate that QPF lowers 20% for VoIP delay and obtains 8.19% more VoIP Thro
ughput than PF. The QPF performance for VoD delay can be enhanced by 11.53%, the Throughput is increased by 8.05%. Also, the delay for Web of QPF can be improved by 28.58%, and the Throughput is enhanced by 25.25%. Consequently, the proposed QPF can enhance transmission performance and obtain a higher utilization of system resources for various multimedia applications in wireless network.
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