A strategy is described for controlling access to a resource which is shared between a trusted environment and an untrusted environment. The trenches are formed to a pre-determined distance apart. The corner constellation points are points having a maximum Euclidean distance from among a plurality of constellation points corresponding to the modulation order. The LUN Mapping cache may also generate a value that is added to or subtracted from the LUN field value in the FCP_CMND frame. The method includes determining whether a system global location update registration timer is applied to the MS, when it is determined that the global location update registration timer is not applied, determining a timer for updating a location when the MS operates in an idle mode, and transmitting a message including the timer to the MS. The moment of inertia of the tennis racket in a swing direction is set to not less than 450,000 gcm2 nor more than 490,000 gcm2, when strings are not tensionally mounted thereon.