Patent ID: 8359038

Claim:
A method, comprising: determining an allocated radio resource to be allocated for contention based access; and accessing the allocated radio resource according to a probability function that varies in dependence on at least one of interference measured on the allocated radio resource and a received power level for the allocated radio resource; wherein the probability function is: P access_channel ∝ max ⁡ [ 0 , P_ ⁢ 0 local + offset - max ⁡ ( I measured , I min ) ] P_ ⁢ 0 local + offset - I min in which: P — 0 local is a target received power level for the allocated radio resource; offset is a parameter to adjust the range in which greater than zero probabilities exist related to certain values of P — 0 local ; I measured is the interference measured on the allocated radio resource; and I min is a parameter indicating the interference level for which P access — channel =1.