Patent ID: 8588186

Claim:
A method comprising: transmitting a ranging sequence, modulated according to a first modulation mode at a first power level, from a transceiver of a mobile station to establish a connection with a base station, wherein the first power level is selected based on a first normalized carrier-to-noise value associated with the first modulation mode in a table, and wherein the table is stored in the mobile station and includes a plurality of normalized carrier-to-noise values with respective modulation modes; transmitting a first ranging request message to the base station according to a second modulation mode at a second power level, wherein the second power level is selected based on a second normalized carrier-to-noise value associated with the second modulation mode in the table, wherein the first ranging request message is transmitted subsequent to receiving a ranging response message from the base station, and wherein the ranging response message is received in response to the ranging sequence; and in response to the transceiver not receiving a response to the first ranging request message within a predetermined interval from the transmission of the first ranging request message to the base station, increasing each of the plurality of normalized carrier-to-noise values in the table by a predetermined amount except the first normalized carrier-to-noise value associated with the first modulation mode.