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Impact of Signaling Load on the UMTS Call Blocking/Dropping



Yi Qian, David Tipper, Saowaphak Sasanus


Radio resources in the third generation (3G) wireless cellular networks (WCNs) such as the universal mobile telecommunications system (UMTS) network is limited in term of soft capacity. The quality of a signaling service transmission depends on various factors (i.e., a user s location, speed, and data rate requirement), and has impact on quality of user data communications where the opposite order is also true. In this paper, we provide the first step to evaluate the impact that various signaling service types have on call blocking and ongoing call drop in the UMTS systems. The radio resource s acquisition time for various signaling services is calculated according to the specifications in the UMTS standards. The maximum number of sessions that a signaling service type can be transmitted simultaneously is estimated along with the converting value when the other signaling service type is transmitted instead. Our analysis reduces the computational complexity in the call admission control (CAC) and allows the preservation on classes of services. An example of traffic scenario is given illustrating the benefit of our study.
Proceedings Title
Proceeding of IEEE VTC 2008 Spring
Conference Dates
May 12-14, 2008
Conference Location
Singapore, SN
Conference Title
IEEE VTC (Vehicular Technology Conference) 2008


3G, CAC, call blocking, signaling, UMTS


Qian, Y. , Tipper, D. and Sasanus, S. (2008), Impact of Signaling Load on the UMTS Call Blocking/Dropping, Proceeding of IEEE VTC 2008 Spring, Singapore, SN, [online], (Accessed April 24, 2024)
Created May 11, 2008, Updated February 19, 2017