This document describes techniques and apparatuses for managing scheduling requests in an unlicensed frequency band. These techniques include a user equipment receiving first and second configuration messages allocating radio resources for first and second logical channels, respectively, at a scheduling request (SR)-transmission occasion on first and second multiple-access (MA) channels, respectively, in the unlicensed frequency band (402, 404). In aspects, the user equipment detects that the first MA channel is busy and the second MA channel is idle (406). The user equipment transmits a scheduling request via the second radio resource (408) and initiates a timer for the second logical channel to prohibit transmission of an additional scheduling request via the second radio resource until expiration of the timer (410). The user equipment also determines whether to initiate another timer for the first logical channel based on a priority level of the first logical channel (414).