Abstract:The approach that by sharing part of the base stations between adjacent subCORS to eliminate the “service gap” is discussed. In order to achieve largescale subCORS data broadcasting services, it is required to carry out subCORS subnetting. We take the advantage of the FCM algorithm to obtain the membership degree of each triangle to each partition and use the triple tree to describe the topology for each partition.The result shows that by use of these methods the close and continuous subnetting with the number of baseline slightly lower than the threshold for each subnet can be obtained.