1. A user equipment (UE), comprising:a processor, configured to determine a type of a coverage area in which the UE is located, wherein the type of the coverage area is a first coverage area or a second coverage area, the first coverage area is an area that is covered by a broadcast beam from a network device, the broadcast beam is a beam used when the network device sends broadcast information in a broadcast manner, the second coverage area is an area that is not covered by the broadcast beam from the network device and that is in an area that is covered by a unicast beam from the network device, and the unicast beam is a beam used when the network device communicates with the UE in a unicast manner; and
a transceiver, configured to receive the broadcast information from the network device over the broadcast beam when the UE is located in the first coverage area and over the unicast beam when the UE is located in the second coverage area,
wherein the transceiver is configured to: receive, by using the broadcast beam, the broadcast information from the network device when the type of the coverage area determined by the processor is the first coverage area; or receive, by using the unicast beam, the broadcast information from the network device when the type of the coverage area determined by the processor is the second coverage area, wherein a divergence angle of the unicast beam is not greater than a divergence angle of the broadcast beam, and
wherein the transceiver is further configured to: after the processor determines that the UE is in the first coverage area, receive physical random access channel (PRACH) configuration information over one broadcast beam; send a random access preamble by using an uplink beam on a time-frequency resource indicated by the PRACH configuration information, wherein the uplink beam has an association relationship with the broadcast beam or a sending direction of the uplink beam is opposite to a sending direction of the broadcast beam; receive a random access response (RAR) message from the network device, wherein the RAR message comprises an identifier of the random access preamble and uplink authorization information, and the uplink authorization information is used to authorize an uplink time-frequency resource and an uplink beam that are used for communication with the network device; and send a random access message 3 by using the uplink beam authorized by the uplink authorization information and on the uplink time-frequency resource authorized by the uplink authorization information, wherein the random access message 3 comprises identifier information of the UE.