Reverse power control method in a cellular system

Claim 1

A method for controlling a power output level from a mobile station to a base station in a cellular system, said method comprising the steps of: (i) setting a predetermined threshold E b /N o ratio having a maximum value and a minimum value in said system parameters; (j) measuring a E b /N o ratio from said mobile station; (k) comparing said measured E b /N o ratio with said predetermined threshold E b /N o ratio; (l) in the event that said measured E b /N o ratio is greater than said predetermined threshold E b /N o ratio, ordering said mobile station to decrease its transmit power; (m)in the event that said measured E b /N o ratio is not greater than said predetermined threshold E b /N o ratio, ordering said mobile station to increase its transmit power; (n) detecting the signal quality in a forward link to determine whether a good frame is received in one frame duration; (o) in the event that said good frame is not received in said one frame duration, returning to said step (b) of measuring the value of E b /N o from a mobile until said good frame is received in said one frame duration; and, (p) in the event that said good frame is received in said one frame duration, measuring a new E b /N o ratio and establishing said newly measured E b /N o value as a new predetermined threshold E b /N o ratio and returning to said step (b).

Claim 2

A method for controlling a power output level from a mobile station to a base station in a cellular system, said method comprising the steps of: (i) setting a predetermined threshold E b /N o ratio having a maximum value and a minimum value in said system parameters; (j) measuring a E b /N o ratio from said mobile station; (k) comparing said measured E b /N o ratio with said predetermined threshold E b /N o ratio; (l) in the event that said measured E b /N o ratio is greater than said predetermined threshold E b /N o ratio, ordering said mobile station to decrease its transmit power; (m)in the event that said measured E b /N o ratio is not greater than said predetermined threshold E b /N o ratio, ordering said mobile station to increase its transmit power; (n) detecting the signal quality in a forward link to determine whether a good frame is received in one frame duration; (o) in the event that said good frame is not received in said one frame duration, returning to said step (b) of measuring the value of E b /N o from a mobile until said good frame is received in said one frame duration; and, (p) in the event that said good frame is received in said one frame duration, measuring a new E b /N o ratio and establishing said newly measured E b /N o value as a new predetermined threshold E b /N o ratio and returning to said step (b).

Claim 9

A method for controlling a power output level from a mobile station to a base station in a cellular system, said method comprising the steps of: (a) measuring E b /N o ratio received from each mobile station in a demodulator of base station; (b) comparing said measured value with a predetermined threshold E b /N o ratio at a predetermined time interval; (c) if said measured ratio is greater than said predetermined threshold ratio, ordering said mobile station to decrease power by 1 dB; (d) if said measured ratio is not greater than said predetermined threshold ratio, ordering said mobile station to increase the power by 1 dB; (e) in event that said mobile station receives a power control bit from two or more said base stations during a handoff, increasing the transmission power of said mobile station if all received said power control bits are `0`, and decreasing the transmission power of said mobile station if at least one bit having a value of `1` among said received power control bits is detected.

Claim 10

A method for controlling a power output level from a mobile station to a base station in a cellular system, said method comprising the steps of: (a) measuring E b /N o ratio received from each mobile station in a demodulator of base station; (b) comparing said measured value with a predetermined threshold E b /N o ratio at a predetermined time interval; (c) if said measured ratio is greater than said predetermined threshold ratio, ordering said mobile station to decrease power by 1 dB; (d) if said measured ratio is not greater than said predetermined threshold ratio, ordering said mobile station to increase the power by 1 dB; (e) in event that said mobile station receives a power control bit from two or more said base stations during a handoff, increasing the transmission power of said mobile station if all received said power control bits are `0`, and decreasing the transmission power of said mobile station if at least one bit having a value of `1` among said received power control bits is detected.

Claim 11

A method for controlling a power output level from a mobile station to a base station in a cellular system, said method comprising the steps of: (a) receiving a signal by a base station; (b) setting a predetermined threshold E b /N o ratio having a maximum value and a minimum value in said system parameters; (c) measuring a E b /N o ratio from said mobile station; (d) comparing said measured E b /N o ratio with said predetermined threshold E b /N o ratio; (e) in the event that said measured E b /N o ratio is greater than said predetermined threshold E b /N o ratio, ordering said mobile station to decrease its transmit power; (f) in the event that said measured E b /N o ratio is not greater than said predetermined threshold E b /N o ratio, ordering said mobile station to increase its transmit power; (g) detecting the signal quality in a forward link to determine whether a good frame is received in one frame duration; (h) in the event that said good frame is not received in said one frame duration, returning to said step (c) of measuring the value of E b /N o from a mobile until said good frame is received in said one frame duration; and, (i) in the event that said good frame is received in said one frame duration, measuring a new E b /N o ratio and establishing said newly measured E b /N o value as a new predetermined threshold E b /N o ratio and returning to said step (c).

Claim 12

A method for controlling a power output level from a mobile station to a base station in a cellular system, said method comprising the steps of: (a) receiving a signal by a base station; (b) setting a predetermined threshold E b /N o ratio having a maximum value and a minimum value in said system parameters; (c) measuring a E b /N o ratio from said mobile station; (d) comparing said measured E b /N o ratio with said predetermined threshold E b /N o ratio; (e) in the event that said measured E b /N o ratio is greater than said predetermined threshold E b /N o ratio, ordering said mobile station to decrease its transmit power; (f) in the event that said measured E b /N o ratio is not greater than said predetermined threshold E b /N o ratio, ordering said mobile station to increase its transmit power; (g) detecting the signal quality in a forward link to determine whether a good frame is received in one frame duration; (h) in the event that said good frame is not received in said one frame duration, returning to said step (c) of measuring the value of E b /N o from a mobile until said good frame is received in said one frame duration; and, (i) in the event that said good frame is received in said one frame duration, measuring a new E b /N o ratio and establishing said newly measured E b /N o value as a new predetermined threshold E b /N o ratio and returning to said step (c).

Claim 14

A method as set forth in any one of claims 9, wherein said step (d) of comparing said measured E b /N o ratio with said predetermined threshold E b /N o ratio is executed at every 1.24 millisecond (msec).

Claim 17

A method as set forth in any one of claims 13, wherein said step (d) of comparing said measured E b /N o ratio with said predetermined threshold E b /N o ratio is executed at every 1.24 millisecond (msec).