Patent ID: 7058416

Claim:
A method for allocating a TCH (traffic channel) to a mobile station in a concentric cell centered around a base station, the concentric cell is divided into an inner overlaid subcell and an outer underlaid subcell, each of which occupies its own carrier frequency, wherein said method comprises the following steps: 1) establishing a SDCCH (Stand-alone Dedicated Control Channel) between the base station and the mobile station; 2) the base station ( 1 ) receiving a plurality of measured down-link level values sent from the mobile station, and combining one of a plurality of up-link level values measured by the base station with corresponding one of the plurality of down-link level values measured by the mobile station to form a plurality of measured reports; 3) the base station ( 1 ) processing the measured up-link level values obtained directly from the plurality of measured reports with the following equation (1) so as to obtain measured up-link level values of SDCCH; MS — Rxlev — com ( n )= MS — Rxlev ( n )+ Lcomp+Dcomp (1) wherein MS_Rxlev(n) is the measured up-link level value obtained directly from the n th measured report, MS_Rxlev_com(n) is the processed measured up-link level value, Lcomp is compensation for balance of up-link and down-link, Dcomp is compensation for the difference between SDCCH and TCH, and n is the serial number of the measured reports and n≧2; and 4) the base station ( 1 ) determining the distance between itself and the mobile station according to said measured up-link level values MS_Rxlev_com(n); if the distance is relatively long, the base station allocating a TCH at a carrier frequency of the outer underlaid subcell for the mobile station, otherwise allocating a TCH at a carrier frequency of the inner overlaid subcell.