Time-selective Access Control for Realtime Calls in a CDMA Common Trunk

Authors:
Jae-Hoon Kim
Affiliations:
Network R&D Center, SK Telecom, Seoul, Korea
Venue:
Wireless Personal Communications: An International Journal
Year:
2007

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Abstract

We address the problem of dynamically allocating radio resource to various call types over the single CDMA common trunk. Based on the estimation of queue waiting time (QWT) of non-realtime (NRT) calls, we decide the appropriate allocation method to each call between Time Divisional (TD) and Code Divisional (CD) type resource allocation. We perform queuing analysis to derive closed-form expressions for QWT, which enables the delay-guarantee of access control scheme easy to solve in realtime (RT) fashion. This quickness and simplicity of the proposed method to any traffic environment well manifests its potential to real-world implementations. Computational experience also reveals its effectiveness in utilizing resource over the static radio resource allocation schemes, implemented in the presently operative 3G CDMA systems.