Embodiments of the present invention
exploit the reciprocity of radio channels in TDD, and longer-term correlation between average uplink and downlink path losses in FDD
wireless communication systems to enable distributed schedulers in an enhanced uplink
system to allocate
uplink transmission resources while preemptively managing intercell interference levels. Each
cell's
base station transmits a downlink reference
signal at a known transmission
power level. A
mobile station monitors the received
signal strength of the downlink reference signals from multiple base stations. The transmitted and received
signal strength levels can be used by the
mobile station to estimate the amount of intercell interference that the
mobile station's uplink transmissions cause, and the mobile
station's
uplink transmission parameters are adjusted accordingly. In further embodiments, the received reference signal power levels, or values derived therefrom, are transmitted by the mobile
station to its serving
base station, where a scheduling
algorithm uses the information to adjust one or more transmission parameters relating to a grant of
uplink transmission resources to the UE, thereby controlling the intercell interference generated by the mobile
station's uplink transmissions.