Disclosed are a method and device for communications, comprising: on a distributed service center, determining function parameter configuration information of the distributed service center, where the function parameter configuration information comprises: a distributed service center device identification, a network identification, a cluster identification, cluster information, a service identification, network service center identification or address information of a core network; determining communication needs on the distributed service center on the basis of the function parameter configuration information, and transmitting a communication request message to a corresponding device. When the communication request message transmitted by the distributed service center is received by a network service center device of the core network, the device responds on the basis of the communication request message. When a system broadcast message transmitted via an air interface is received by an end point node, same updates cluster state information on the basis of the system broadcast message. Employment of the present invention not only reduces the load that an access device incurs on the core network in storage and signal processing, but also localizes a control function, thus greatly reducing delay caused by a control plane signaling process.