Channel Allocation for Third-generation Mobile Radio Systems
Peter Cherriman, F. Romiti, Lajos Hanzo · ePrints Soton (University of Southampton) · 1998
A range of Dynamic Channel Allocation (DCA) techniques are studied comparatively in the context of the GSM-like system, with the aim of increasing the system’s carried traffic performance. The locally optimised least interference algorithms (LOLIA) emerges, as the best overall candidate, potentially increasing the teletraffic capacity of fixed channel allocation schemes by up to 80 %. 1 Dynamic Channel Allocation Dynamic channel allocation (DCA) techniques have been discussed in detail in the excellent overview paper of Katzela and Naghshineh[1]. Zander [2] investigated the limitations of radio resource management in future wireless networks, while Peha et al [3] discussed the practical problems that may be encountered in designing a DCA based mobile radio system. In dynamic channel allocation all sufficiently high-quality, un-interfered channels can be allocated to users becoming active. DCA algorithms have to balance the increased teletraffic capacity gain upon allocating unused channels to users against the potential co-channel interference inflicted to users already in the system. Due to lack of space here no formal classification of the various DCA techniques can be considered. Instead, we focussed our attention on the comparative study of the family of distributed DCA techniques, which exhibit typically lower complexity and slightly reduced performance in comparison to centralised DCA algorithms. A range distributed DCA algorithms were investigated by Chuang et al [4]. As compromise schemes, locally optimised distributed DCA algorithms were proposed for example by Delli Priscoli et al [5, 6].