Communication method and device

The invention provides a communication method and device, belongs to the technical field of communication, and can realize pseudo base station detection. Wherein the pseudo base station can attack the terminal in a mode of denial of service, so that the terminal cannot be accessed all the time after selecting the pseudo base station, that is, the connection establishment between the terminal and the cell fails. In this case, if the first message indicates that the first terminal fails to establish the connection with the cell, it can be determined that the pseudo base station attack exists in the cell according to the first message, and pseudo base station detection is achieved. 本申请提供一种通信方法及装置，属于通信技术领域，能够实现伪基站检测。其中，伪基站可以采用拒绝服务的方式攻击终端，使得终端选择伪基站后却始终无法接入，即终端与小区建立连接失败。这种情况下，若有第一消息指示第一终端与小区建立连接失败，则可根据该第一消息确定该小区内存在伪基站攻击，实现伪基站检测。