TECHNIQUES FOR CELL ACCESS USING AN UNLICENSED RADIO FREQUENCY SPECTRUM BAND

摘要

Techniques are described for wireless communication. One method includes winning a contention for access to an unlicensed radio frequency spectrum band, transmitting a request message upon winning the contention for access to the unlicensed radio frequency spectrum band, and receiving a response message over the unlicensed radio frequency spectrum band. The request message is transmitted by a user equipment (UE) on an enhanced physical random access channel (ePRACH) or shortened ePRACH (SePRACH), to access a cell that operates in the unlicensed radio frequency spectrum band. The response message is received in response to transmitting the request message, and the request message may be transmitted irrespective of whether a base station has gained access to the unlicensed radio frequency spectrum band.

主权项

1. A method of wireless communication comprising:
determining a subframe within a radio frame available for transmission of a request message for access to an unlicensed radio frequency spectrum band; identifying a first subset of symbols within the subframe for performing a contention-based access procedure for gaining access to the unlicensed radio frequency spectrum band, and a second subset of symbols within the subframe for transmission of the request message for access to the unlicensed radio frequency spectrum band; performing the contention-based access procedure during the first subset of symbols; and transmitting the request message during the second subset of symbols based on an outcome of the contention-based access procedure.