Synchronization among neighboring RNCs in a TD-CDMA mobile network

We use zone concepts, and also consider multiple-bunching in a TD-CDMA mobile network. In the multiple-bunch environment, we need a synchronization mechanism to avoid inter-RNC (radio network controller) interference. We use an "informed-of" message to transmit local resource allocation results to neighboring RNCs through a high-speed network. Thus, inter-RNC interference can be avoided and global resources can be allocated using message passing. Within the resource allocation algorithm, we also find maximal compatible cliques to achieve best resource utilization, using the graph algorithm to find maximal cliques in graph theory. Through simulation, we found that the SRU (soft resource unit) classification using conservative strategy matching the SRU allocation using aggressive strategy has the best performance among all combinations.