@article{(Open Science Index):https://publications.waset.org/pdf/3894,
	  title     = {Admission Control Approaches in the IMS Presence Service},
	  author    = {Muhammad T. Alam and  Zheng Da Wu},
	  country	= {},
	  institution	= {},
	  abstract     = {In this research, we propose a weighted class based
queuing (WCBQ) mechanism to provide class differentiation and to
reduce the load for the IMS (IP Multimedia Subsystem) presence
server (PS). The tasks of admission controller for the PS are
demonstrated. Analysis and simulation models are developed to
quantify the performance of WCBQ scheme. An optimized dropping
time frame has been developed based on which some of the preexisting
messages are dropped from the PS-buffer. Cost functions are
developed and simulation comparison has been performed with FCFS
(First Come First Served) scheme. The results show that the PS
benefits significantly from the proposed queuing and dropping
algorithm (WCBQ) during heavy traffic.},
	    journal   = {International Journal of Computer and Information Engineering},
	  volume    = {2},
	  number    = {3},
	  year      = {2008},
	  pages     = {943 - 958},
	  ee        = {https://publications.waset.org/pdf/3894},
	  url   	= {https://publications.waset.org/vol/15},
	  bibsource = {https://publications.waset.org/},
	  issn  	= {eISSN: 1307-6892},
	  publisher = {World Academy of Science, Engineering and Technology},
	  index 	= {Open Science Index 15, 2008},
	}