Multi-Constrained Core Selection for Group Communications

The core-based approach in multipoint communication broadens the solution space in terms of QoSefficiency of solutions in inter and intra-domain routing. In an earlier work [KH03a], we showed that the constrained cost minimization solutions in core-based approach proposed to date are restrictive in their search to a subrange of solutions, and we proposed SPAN, a generic framework to process in the extended solution space. In this paper, we study the core selection component of SPAN and propose two novel algorithms, SPAN/COST and SPAN/ADJUST. Our algorithms consistently outperform their counterparts proposed to date and can be considered pioneering in their optimization range of multiple metrics and processing in the extended solution space.