Patent ID: 8687564

Claim:
A method of determining random access resources performed by a mobile terminal, the method comprising: receiving information about available random access resources from a network; selecting a set of allowed random access resources from the available random access resources based on default values or information received from the network; measuring signal quality of at least one of a cell to be accessed or a neighboring cell; and deriving a random access resource from the set of allowed random access resources based on the measuring, wherein each of the set of allowed random access resources comprises a random access channel (RACH) comprising M RACH allowed frequencies mapped on T RACH time offsets, and S time offsets are defined per a RACH allowed frequency, where each of M, T, and S is a positive number, and wherein a time offset of the derived random access resource is determined by the following formula: TimeOffset = [ AllowedFrequencies j + ( k Ã— T S ) ] â¢ % â¢ T â¢ with â¢ : â¢ â¢ j = 0 , 1 , 2 , 3 , â€¦ â¢ â¢ M ; k = 1 , 2 , 3 , â€¦ â¢ â¢ S , where % represents a modulo operation.