CONFIGURING RANDOM ACCESS CHANNELS FOR WIRELESS COMMUNICATIONS

According to certain embodiments, a method for use in a wireless device is disclosed. The method comprises: receiving, from a network, a Physical Random Access Channel (PRACH) configuration index; receiving, from the network, radio resource control signaling including a bitmap that provides an indication of synchronization signal (SS) blocks of an SS burst set being transmitted by the network; and restricting random access preamble transmission in response to determining that the wireless device is operating in an unpaired spectrum. The restricting includes determining, based on the PRACH configuration index and the bitmap, a time slot between transmitted SS blocks of the SS burst set that does not overlap with the transmission of the indicated SS blocks. The method further comprises transmitting a random access preamble during the determined time slot.