초록 ▼

A method and apparatus providing centralized power control in a multiple base station communication configuration. Each base station in a system operates to control both over the forward link power it transmits and the reverse link power from the remote units. A radio link manger provides a common t

A method and apparatus providing centralized power control in a multiple base station communication configuration. Each base station in a system operates to control both over the forward link power it transmits and the reverse link power from the remote units. A radio link manger provides a common threshold for determining the proper power level of the reverse link signal at each base station. The radio link manager also provides a ratio of the forward link signal strength to a pilot signal strength to control forward link power control. The radio link manager provides the threshold and the ratio uniformly to all base stations thus providing a uniform operating point for all base stations in a system and thus increasing capacity. The same centralized power control is easily expanded to provide a mechanism for intersystem soft handoff.

대표청구항 ▼

[ We claim:] [1.] In a system wherein forward link frame data is transmitted from at least one active base station to a remote unit and reverse link frame data is transmitted from said remote unit to said at least one active base station, a method of providing centrally controlled power control, com

[ We claim:] [1.] In a system wherein forward link frame data is transmitted from at least one active base station to a remote unit and reverse link frame data is transmitted from said remote unit to said at least one active base station, a method of providing centrally controlled power control, comprising the steps of:transmitting a first forward link frame of data from a first active base station to said remote unit at a first power level and transmitting a pilot signal at a first base station pilot power level;receiving at said remote unit said first forward link frame of data and decoding said first forward link frame of data to produce a first forward link estimated frame of data or an erasure bit;transmitting from said remote unit to said first active base station an erasure indication bit indicating whether said first forward link frame of data was decoded as an erasure;receiving at said first active base station said erasure indication bit and forwarding said erasure indication bit to a radio link manager;calculating at said radio link manager a desired ratio of a power level of a second forward link frame of data to a pilot power level, said desired ratio being based upon a logical value of said erasure indication bit;transmitting from said radio link manager to each of said at least one active base stations said desired ratio and said second forward link frame of data; andtransmitting said second forward link frame of data at a second power level from said first active base station, wherein said second power level is equal to said first base station pilot power level times said desired ratio. [3.] In a system including at least one active base station in communication with a remote unit, a method of controlling power transmitted within said system, comprising the steps of:transmitting a first forward link frame of data from a first active base station to said remote unit at a first power level and transmitting a pilot signal at a first pilot power level;receiving at said remote unit said first forward link frame of data and producing a first forward link frame quality indication, said first forward link frame quality indication being determined based on either (1) a forward error rate associated with said first forward link frame of data, or (2) a logical value of an erasure indication bit associated with said first forward link frame of data;transmitting from said remote unit to said first active base station said first frame quality indication;receiving at said first active base station said first frame quality indication;calculating at a system controller a desired ratio of a power level of a second forward link frame of data to a power level of said pilot signal based upon said first frame quality indication; andtransmitting, from said first active base station, a second forward link frame at a power level determined in accordance with said first pilot power level and said desired ratio.