MOBILE COMMUNICATION DEVICE, MOBILE COMMUNICATION BASE STATION, AND MOBILE COMMUNICATION METHOD

To provide a wireless communication device including: a communication unit configured to transmit/receive signals to/from another wireless communication device using a channel frequency; a storage configured to store at least voice data collected by a microphone; an operation unit configured to detect a transmission starting operation and a transmission stopping operation; a communication quality measuring unit configured to measure a bit error rate indicating quality of communication using the channel frequency for each predetermined period; and a controller configured to control at least the communication unit and the storage in accordance with the transmission starting operation and the transmission stopping operation detected by the operation unit. The controller controls the storage to store, in a case in which the operation unit detects the transmission starting operation when the channel frequency is used by other wireless communication devices, the voice data until the operation unit detects the transmission stopping operation, control the communication unit to transmit, in a case in which the channel frequency is not used by other wireless communication devices and the bit error rate measured by the communication quality measuring unit is smaller than a first threshold, all pieces of voice data that have not been transmitted of the voice data stored in the storage, and control the communication unit to transmit, in a case in which the channel frequency is not used by other wireless communication devices and the bit error rate is equal to or larger than the first threshold and smaller than a second threshold, a piece of divided data having a predetermined length from a head of the voice data that has not been transmitted of the voice data stored in the storage.