The document summarizes a research paper that proposes a new clustering routing protocol called Cluster based Stable Routing protocol (CSR) for mobile ad hoc networks. The protocol uses Binary Particle Swarm Optimization (BPSO) to select cluster heads and determine the optimal number of clusters. The goal is to minimize the number of clusters, efficiently select cluster heads based on remaining battery power, and maximize network lifetime. Experiments showed the proposed method efficiently forms clusters in mobile ad hoc networks.