Asynchronous communication method based on micropower wireless network

The invention relates to the field of power consumption information acquisition, in particular to an asynchronous communication method based on a micropower wireless network. A CAC only starts to execute a next task upon completion of a previous task each time; and therefore, time consumed increases with the number of the tasks. The method comprises the following steps: when a plurality of acquisition tasks exist in a concentrator, all the tasks are issued to the CAC at a time; whether N tasks are executed in a downlink network or not is judged; if the N tasks are not executed, the CAC selects tasks, of which routes are not related to routes of the tasks being executed, from the cache tasks, and issues the tasks; the concentrator reads the number of the cache tasks in the CAC at regular times, and judges whether the number of the cache tasks in the CAC is smaller than M or not; and if the number of the cache tasks in the CAC is smaller than M, the concentrator issues tasks to the CAC until the number of the c