Embodiments of this application disclose a communication method and a related apparatus. The method includes: receiving first information from an access network device; entering a first state based on the first information; receiving, in the first state, wake-up information from the access network device, and skipping receiving, in the first state, one or more pieces of the following information from the access network device: a paging message, a synchronization signal, or a system message; and leaving the first state based on the wake-up information, and receiving the one or more pieces of information from the access network device; or leaving the first state based on the wake-up information, and initiating a random access request. With the low-power first state introduced, power consumption of a terminal device is reduced.