# US 9,883,460 B2 · Method and apparatus for power control in a wireless communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,883,460 B2 - Document ID: US9883460B2 - Status: Granted - Kind: B2 - Application number: 14/071,923 - Filed: 2013-11-05 - Published: 2014-03-06 - Granted: 2018-01-30 - Earliest claimed: 2001-02-12 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Stein Arne Lundby - Web page: https://patentgrep.com/patent/US9883460B2 ## CPC - H04W 52/143: {Downlink power control} - H04W 52/08: Closed loop power control - H04W 52/267: {taking into account the information rate} - H04W 52/325: {Power control of control or pilot channels} - H04W 52/50: at the moment of starting communication in a multiple access environment - H04W 52/56: Detection of errors of TPC bits - H04W 52/24: using SIR [Signal to Interference Ratio] or other wireless path parameters - H04W 52/54: Signalisation aspects of the TPC commands, e.g. frame structure - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Method and Apparatus for performing power control on the power control commands transmitted on a forward link in a wireless communication system. The power level of the power control bits on the forward link are adjusted in response to power commands received on the reverse link. The mobile station measures the power level of the adjusted power control bits to measure the quality of the forward link. ## Claims ### Claim 1 An apparatus comprising: a receiver configured to receive a forward link power control instruction on a forward link common control channel in a time-division multiplexed time slot, wherein the time-division multiplexed time slot is for a mobile station; a link quality estimation unit configured to generate a link quality estimate based on a received power level of the forward link power control instruction; and a power control unit coupled to the link quality estimation unit, the power control unit configured to generate a reverse link power control instruction in response to the link quality estimate and to control transmission power of a reverse link code channel in response to the forward link power control instruction, wherein the reverse link power control instruction includes one or more commands configured to adjust a transmit power of the forward link at a base station. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the power control unit is further configured to control transmission power of the reverse link power control instruction on a reverse link in response to the forward link power control instruction. ### Claim 3 (depends on 1) The apparatus of claim 1, further comprising a transmitter configured to transmit the reverse link power control instruction on a reverse link. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the link quality estimate is a signal-to-noise ratio (SNR). ### Claim 5 (depends on 1) The apparatus of claim 1, further comprising a threshold comparator configured to compare the link quality estimate to a setpoint, wherein the power control unit is further configured to generate the reverse link power control instruction based on the result of the comparison. ### Claim 6 (depends on 5) The apparatus of claim 5, further comprising a setpoint adjustment unit configured to update the setpoint as a function of an error rate. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein a single spreading code is assigned to the forward link common control channel. ### Claim 8 An apparatus comprising: a determination unit configured to determine a reverse link power control instruction received on a reverse link for base station transmission on a forward link; a first adjustment unit coupled to the determination unit, the first adjustment unit configured to adjust transmission power of a forward link code channel in response to the reverse link power control instruction; a second adjustment unit coupled to the determination unit, the second adjustment unit configured to adjust a transmission power level of a forward link power control instruction based on the reverse link power control instruction; and a transmitter configured to transmit the forward link power control instruction on a forward link common control channel in a time-division multiplexed time slot, wherein the time-division multiplexed time slot is for a remote station. ### Claim 9 (depends on 8) The apparatus of claim 8, wherein the reverse link power control instruction is extracted from a signal received on the reverse link. ### Claim 10 A method for power control in a wireless communication system, the method comprising: receiving a forward link power control instruction on a forward link common control channel in a time-division multiplexed time slot, wherein the time-division multiplexed time slot is for a remote station; generating a link quality estimate based on a received power level of the forward link power control instruction; generating a reverse link power control instruction in response to the link quality estimate, wherein the reverse link power control instruction includes one or more commands configured to adjust a transmit power of the forward link at a base station; and controlling transmission power of a reverse link code channel based on the forward link power control instruction. ### Claim 11 (depends on 10) The method of claim 10, further comprising transmitting the reverse link power control instruction on the reverse link. ### Claim 12 A method for power control in a wireless communication system, the method comprising: determining a reverse link power control instruction received on a reverse link for base station transmission on a forward link; adjusting transmission power of a forward link code channel in response to the reverse link power control instruction; adjusting a transmission power level of a forward link power control instruction based on the reverse link power control instruction; and transmitting the forward link power control instruction on a forward link common control channel in a time-division multiplexed time slot, wherein the time-division multiplexed time slot is for a remote station. ### Claim 13 (depends on 12) The method of claim 12, wherein the determination comprises extracting the reverse link power control instruction from a signal received on the reverse link. ### Claim 14 An apparatus comprising: means for receiving a forward link power control instruction on a forward link common control channel in a time-division multiplexed time slot, wherein the time-division multiplexed time slot is for a remote station; means for generating a link quality estimate based on a received power level of the forward link power control instruction; means for generating a reverse link power control instruction in response to the link quality estimate, wherein the reverse link power control instruction includes one or more commands configured to adjust a transmit power of the forward link at a base station; and means for controlling transmission power of a reverse link code channel in response to the forward link power control instruction. ### Claim 15 (depends on 14) The apparatus of claim 14, further comprising means for controlling transmission power of the reverse link power control instruction on a reverse link in response to the forward link power control instruction. ### Claim 16 (depends on 14) The apparatus of claim 14, further comprising means for transmitting the reverse link power control instruction on a reverse link. ### Claim 17 An apparatus comprising: means for determining a reverse link power control instruction received on a reverse link for base station transmission on a forward link; means for adjusting transmission power of a forward link code channel in response to the reverse link power control instruction; means for adjusting a transmission power level of a forward link power control instruction based on the reverse link power control instruction, wherein the means for adjusting are coupled to the means for determining; and means for transmitting the forward link power control instruction on a forward link common control channel in a time-division multiplexed time slot, wherein the time-division multiplexed time slot is for a remote station. ### Claim 18 (depends on 17) The apparatus of claim 17, wherein the reverse link power control instruction is extracted from a signal received on the reverse link. ### Claim 19 A non-transitory machine-readable medium embodying a method for power control in remote station, the method comprising: receiving a forward link power control instruction on a forward link common control channel in a time-division multiplexed time slot, wherein the time-division multiplexed time slot is for the remote station; generating a link quality estimate based on a received power level of the forward link power control instruction; generating a reverse link power control instruction in response to the link quality estimate, wherein the reverse link power control instruction includes one or more commands configured to adjust a transmit power of the forward link at a base station; and controlling transmission power of a reverse link code channel in response to the forward link power control instruction. ### Claim 20 A non-transitory machine-readable medium embodying a method for power control in a base station, the method comprising: determining a reverse link power control instruction received on a reverse link for base station transmission on a forward link; adjusting transmission power of a forward link code channel in response to the reverse link power control instruction; adjusting a transmission power level of a forward link power control instruction based on the reverse link power control instruction; and transmitting the forward link power control instruction on a forward link common control channel in a time-division multiplexed time slot, wherein the time-division multiplexed time slot is for a remote station. ### Claim 21 A mobile station, comprising: one or more antennas configured to receive a forward link power control instruction on a forward link common control channel in a time-division multiplexed time slot, wherein the time-division multiplexed time slot is for the mobile station; a link quality estimation unit configured to generate a link quality estimate based on a received power level of the forward link power control instruction; and a power control unit coupled to the link quality estimation unit, the power control unit configured to generate a reverse link power control instruction in response to the link quality estimate and to control transmission power of a reverse link code channel in response to the forward link power control instruction, wherein the reverse link power control instruction includes one or more commands configured to adjust a transmit power of the forward link at a base station. ### Claim 22 A base station, comprising: a determination unit configured to determine a reverse link power control instruction received on a reverse link for base station transmission on a forward link; a first adjustment unit coupled to the determination unit, the first adjustment unit configured to adjust transmission power of a forward link code channel in response to the reverse link power control instruction; a second adjustment unit coupled to the determination unit, the second adjustment unit configured to adjust a transmission power level of a forward link power control instruction based on the reverse link power control instruction; one or more antennas configured to receive the reverse link power control instruction on the reverse link; and a transmitter configured to transmit the forward link power control instruction on a forward link common control channel in a time-division multiplexed time slot, wherein the time-division multiplexed time slot is for a remote station. ### Claim 23 A mobile station, comprising: at least one processor configured to: receive a forward link power control instruction on a forward link common control channel in a time-division multiplexed time slot, wherein the time-division multiplexed time slot is for a mobile station, generate a link quality estimate based on a received power level of the forward link power control instruction, generate a reverse link power control instruction in response to the link quality estimate, wherein the reverse link power control instruction includes one or more commands configured to adjust a transmit power of the forward link at a base station, and control transmission power of a reverse link code channel in response to the forward link power control instruction; and a memory coupled to the at least one processor. ### Claim 24 A base station, comprising: at least one processor configured to: determine a reverse link power control instruction received on a reverse link for base station transmission on a forward link, adjust transmission power of a forward link code channel in response to the reverse link power control instruction, adjust a transmission power level of a forward link power control instruction based on the reverse link power control instruction, and transmit the forward link power control instruction on a forward link common control channel in a time-division multiplexed time slot, wherein the time-division multiplexed time slot is for a mobile station; and a memory coupled to the at least one processor.