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AssigneeInterDigital Technology Corporation
InventorsStephen E. Terry, Stephen G. Dick, James M. Miller, Eldad Zeira, Ariela Zeira
Estimating the term…
In a wireless digital communication system employing code-division multiple access (CDMA) technology, a method in which adaptive modulation and coding (AM&C) is utilized in order to achieve improved radio resource utilization and provide increased data rates for user services in which the base station measures up link interference on all time slots received from mobile terminals (UEs) and determines the need for uplink control channel; the base station transmitting to the UE the allocation of specific uplink control channels indicating uplink interference in the time slot and potentially the quality margin; the UE determining appropriate uplink power level based on a path loss determination made by the UE, uplink interference and the quality margin; the UE initiating an uplink common control transmission responsive to these determinations.
A method for determining uplink power level in a wireless digital communication system comprising a base station and at least one user equipment (UE), comprising the steps of:
A method for employing an open loop technique for determining uplink power level in a wireless digital communication system comprising of a base station and a plurality of user equipment (UEs), comprising the steps of:
A method for employing an open loop technique for determining uplink power level in a wireless digital communication system comprised of a base station and at least one mobile terminal (UE), comprising the steps of:
A method for power control between a base station and a user equipment (UE), comprising:
A method for determining an uplink power level in a user equipment (UE), comprising the steps of:
A method for determining uplink power level by a user equipment (UE), comprising:
A method for determining uplink power level comprising the steps of:
A method for determining uplink power level comprising the steps of:
Dependencies are inferred from the claim text.
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Separate analysis of uplink or downlink: uplink power control
Two-way operation using the same type of signal, i.e. duplex: using time-sharing
Taking into account previous information or commands: using past power values or information
TPC being performed according to specific parameters: using SIR [Signal to Interference Ratio] or other wireless path parameters
Term ended 18 Mar 2022 (estimated)
The present invention relates to wireless digital communication systems. More particularly, the present invention is directed to a code division multiple access (CDMA) communication system utilizing uplink power control for adaptive modulation and coding.
CDMA third generation (3G) cellular telecommunication systems apply adaptive modulation and coding (AM&C) to transmissions to achieve and improve radio resource utilization and provide increased data rates for user services. AM&C techniques take into account RF propagation conditions in advance of transmissions in order to determine modulation and coding rates that will take greatest advantage of current RF propagation conditions.
One method for determining RF propagation conditions is to perform a physical channel quality measurement at the receiver in advance of each transmission. This measurement is sent to the transmitter, which then determines the appropriate modulation and coding rate for the particular transmission based upon the physical channel quality measurement.
FIG. 1A is a simplified block diagram of a base station of the present invention.
FIG. 1B is a simplified block diagram of a user equipment of the present invention.
FIG. 1C is a simplified block diagram of an alternative embodiment of a base station of the present invention.
The present invention will be described with reference to the drawing figures wherein like numerals represent like elements throughout.
FIG. 1A is a simplified block diagram of a universal mobile telecommunications system terrestrial radio access network (UTRAN) base station 12, (hereinafter BS 12), which communicates wirelessly over an RF link 25 to a UE 30, (shown in FIG. 1B). The UE 30 may be a wireless cell phone, PDA or other like device which may include additional capabilities such as paging, e-mail and the like.
The BS 12 comprises an antenna 24, (or multiple antennas), an isolator/switch 22 (or like device), a time slot interference measurement device 26, an uplink common control channel receiver 28, a common control channel quality monitoring device 18, a summing device 20 and a reference downlink channel spreading and modulation device 14. The BS 12 receives communications over the radio link 25 via the antenna 24. Received signals are coupled to the interference measurement device 26 and the uplink common control channel receiver 28 through the isolator/switch 22.