Patent ID: 8498226
Filing Date: 2013-07-30
Classification: H04W

Abstract:
1. A method for determining a quantity of physical random access channels (PRACHs) comprising: a terminal determining configuration parameters related to the quantity of the random access channels in an uplink pilot time slot (UpPTS) based on system configuration, said configuration parameters including a quantity of downlink-to-uplink switch-points in one radio frame, N said terminal then calculating directly the quantity of the PRACHs in said UpPTS based on the configuration parameters; wherein when D where α=D RA mod 2; β=(N SP −1)mod 2; and t RA 1 =0 when said UpPTS is located in the first half-frame of the radio frame, and t RA 1 =1 when in the second half-frame of the radio frame, “└ ┘” means rounding down to the nearest integer, and mod is a modulo operation.