초록 ▼

In a mobile radio telephone system employing TDMA or CDMA, mobile units often must determine the timing and appropriate power necessary for transmissions to a base station. Information broadcast by base stations allows the mobile station to approximate its distance from each base station based on an

In a mobile radio telephone system employing TDMA or CDMA, mobile units often must determine the timing and appropriate power necessary for transmissions to a base station. Information broadcast by base stations allows the mobile station to approximate its distance from each base station based on an average signal strength received and thereby determine the coarse sector location. Broadcast information may include the mean radial distribution of signal strength versus distance. From the broadcast information, the mobile station determines the propagation loss for a transmission to the base station and the appropriate power level and timing for transmissions. Accordingly, the mobile station transmits signals to the base station at the determined signal timing and power level.

대표청구항 ▼

In a multiple access, spread spectrum communications system, a method for establishing communications between a mobile station and at least one base station, said method including the steps of: broadcasting a signal to said mobile station from at least one base station wherein the broadcast signal f

In a multiple access, spread spectrum communications system, a method for establishing communications between a mobile station and at least one base station, said method including the steps of: broadcasting a signal to said mobile station from at least one base station wherein the broadcast signal from said at least one base station includes data; receiving at said mobile station the broadcast signal of said at least one base station; determining a mean signal strength for said received broadcast signal; and estimating a distance between the mobile station and said at least one base station based on said data and said mean signal strength of said received broadcast signal.