# US 8,787,180 B2 · System and method for rate assignment > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,787,180 B2 - Document ID: US8787180B2 - Status: Granted - Kind: B2 - Application number: 12/340,009 - Filed: 2008-12-19 - Published: 2009-04-16 - Granted: 2014-07-22 - Earliest claimed: 2002-09-10 - Assignees: QUALCOMM Incorporated - Applicants: Avinash Jain; Jelena Damnjanovic; Tao Chen - Inventors: Avinash Jain; Jelena Damnjanovic; Tao Chen - Web page: https://patentgrep.com/patent/US8787180B2 ## CPC - H04W 24/02: Arrangements for optimising operational condition - H04W 52/12: Outer and inner loops - H04W 52/26: using transmission rate or quality of service QoS [Quality of Service] - H04W 52/40: during macro-diversity or soft handoff - H04W 52/54: Signalisation aspects of the TPC commands, e.g. frame structure - H04L 1/0002: {by adapting the transmission rate} - H04W 52/267: {taking into account the information rate} - H04W 52/34: TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading - H04W 52/44: in connection with interruption of transmission - H04W 52/60: using different transmission rates for TPC commands - H04W 72/12: Wireless traffic scheduling - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A method and apparatus for determining the data rate of a reverse link communication. An embodiment includes transmitting at a null rate on the communication channel only when the station is not transmitting voice, signaling, or data. An embodiment includes determining a maximum requested rate based on the normalized average pilot transmit power and the pilot reference value, and determining the timing of the rate request. An embodiment involves determining a maximum transmission rate. An embodiment involves determining sufficient power and a power-control set point. ## Claims ### Claim 1 A method of determining a maximum rate, comprising: determining a normalized average pilot transmit power; determining a transmit power for a mobile station based on the normalized average pilot transmit power, a pilot reference value, and a ratio of traffic power to pilot power for a rate; determining a ratio of a maximum transmit power of the mobile station to a headroom for channel variation; and determining a maximum value for the rate for which the transmit power of the mobile station is less than or equal to the ratio of the maximum transmit power of the mobile station to the headroom for channel variation. ### Claim 2 (depends on 1) The method of claim 1, wherein determining the normalized average pilot transmit power is based on an actual transmit pilot power after power constraints are applied. ### Claim 3 (depends on 2) The method of claim 2, wherein determining the normalized average pilot transmit power allows for headroom. ### Claim 4 (depends on 1) The method of claim 1, wherein determining the transmit power for the mobile station is further based on a ratio of control channel power to pilot power for the control channel. ### Claim 5 A mobile station, comprising: an antenna for receiving and transmitting a plurality of signals; a receiver coupled to the antenna, the receiver receives the plurality of receive signals; a controller coupled to the receiver, wherein the controller is configured to determine a normalized average pilot transmit power from the plurality of receive signals, determine a transmit power for the mobile station based on the normalized average pilot transmit power, a pilot reference value, and a ratio of traffic power to pilot power for a rate, determine a ratio of a maximum transmit power of the mobile station to a headroom for channel variation, and determine a maximum value of the rate for which the transmit power of the mobile station is less than or equal to the ratio of the maximum transmit power of the mobile station to the headroom for channel variation; and a transmitter coupled to the controller, the transmitter conditions the maximum rate for transmission. ### Claim 6 (depends on 5) The mobile station of claim 5, wherein the determination of the normalized average pilot transmit power is based on an actual transmit pilot power after power constraints are applied. ### Claim 7 (depends on 5) The mobile station of claim 5, wherein the determination of the normalized average pilot transmit power allows for headroom. ### Claim 8 (depends on 5) The mobile station of claim 5, wherein the determination of the transmit power for the mobile station is further based on a ratio of control channel power to pilot power for the control channel. ### Claim 9 A non-transitory computer-readable medium embodying a program of instructions executable by a processor to perform a method of determining a maximum rate, the method comprising: determining a normalized average pilot transmit power; determining a transmit power for a mobile station based on the normalized average pilot transmit power, a pilot reference value, and a ratio of traffic power to pilot power for a rate; determining a ratio of a maximum transmit power of the mobile station to a headroom for channel variation; and determining a maximum value for the rate for which the transmit power of the mobile station is less than or equal to the ratio of the maximum transmit power of the mobile station to the headroom for channel variation. ### Claim 10 (depends on 9) The non-transitory computer-readable medium of claim 9, wherein determining the normalized average pilot transmit power is based on an actual transmit pilot power after power constraints are applied. ### Claim 11 (depends on 9) The non-transitory computer-readable medium of claim 9, wherein determining the normalized average pilot transmit power allows for headroom. ### Claim 12 (depends on 9) The non-transitory computer-readable medium of claim 9, wherein determining the transmit power for the mobile station is further based on a ratio of control channel power to pilot power for the control channel.