Patent ID: 7454204

Claim:
A method of accessing resources of a radiocommunication system comprising at least one base station, from a mobile terminal, the mobile terminal being arranged to sent access requests to the base station at respective send instants, the base station being arranged to detect access requests from the mobile terminal in reception windows, each reception window being provided for detection of access requests sent in a corresponding slot of send instants by a mobile terminal situated at a distance from the base station of less than a threshold, the reception window following the corresponding slot of send instants by a reference time interval, the method comprising the steps of: (a) determining a level of remoteness of the mobile terminal with respect to the base station; and (b) conditionally as a function of the level of remoteness determined between the mobile terminal and the base station, using a time interval greater than the reference interval, between the reception windows and the corresponding slots of instants of sending of the access requests by said mobile terminal, so that the base station can detect an access request sent by said mobile terminal, in a reception window following, by said time interval, the corresponding slot for the instant of sending of the access request, wherein the access requests are sent by the mobile terminal with a given reserved signature from among a set of possible reserved signatures, exclusively when the mobile terminal is considered to be remote from the base station by a distance greater than said threshold, and wherein the use of the time interval greater than the reference interval, between the reception windows and the corresponding slots of instants of sending the of the access requests by said mobile terminal, comprises a shift over time of the reception windows so as to detect the access requests sent with said given reserved signature, and in case the mobile terminal is considered to be within the threshold distance from the base station, then the access requests are sent with an unreserved signature and detected in an unshifted reception window.