On-Demanded Multicast Zone Configuration in CDMA Network Systems
Wireless Personal Communications: An International Journal
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This paper deals with one of the most important cell planning issues in a CDMA based multicast network. In a CDMA based wireless network, a terminal can significantly reduce the bit error rate via the cohesion of data streams from multiple base stations that share a common time line and are operated according to it. The cells whose base stations are operated as such are called soft-combining cells. Therefore, a terminal in a soft-combining cell can take advantage of error rate reduction, if the cell has at least one neighboring soft-combining cell. However, as soft-combining operation gives heavy burden to the network controller, the number of soft-combining cells should be limited. Our problem is to find a limited number of soft-combining cells such that each soft-combining cell has at least one neighboring soft-combining cell and that the sum of traffic demands of the selected cells is maximized.