Patent ID: 8570902

Claim:
A method for selecting a random access resource, the method comprising: receiving, by a terminal, a physical downlink control channel signaling sent by a system; determining, by the terminal, from among a plurality of subframes following a subframe in which the physical downlink control channel signaling is received, a first subframe which meets condition A and contains a random access resource, wherein condition A is that the time difference between the current subframe and the subframe in which the physical downlink control channel signaling is received is greater than or equal to k, and k is a time delay defined at a physical layer of the terminal; and selecting, by the terminal, starting from the first subframe, one or more subframes each containing a respective random access source, wherein assuming the subframe in which the physical downlink control channel signaling is received has a subframe number m, and is located in a radio frame which has a frame number M, the first subframe has a subframe number n, and is located in a radio frame which has a frame number N, the first subframe further meets the following equation: N= ( M +└( m+k )/10┘)%1024, n= ( m+k )%10.