# US 9,882,391 B2 · Filtering a stream of power control commands > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,882,391 B2 - Document ID: US9882391B2 - Status: Granted - Kind: B2 - Application number: 14/354,808 - Filed: 2011-11-28 - Published: 2014-09-25 - Granted: 2018-01-30 - Earliest claimed: 2011-11-04 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Magnus Persson - Inventors: Magnus Persson - Web page: https://patentgrep.com/patent/US9882391B2 ## CPC - H02J 4/00: Circuit arrangements for mains or distribution networks not specified as AC or DC; Circuit arrangements for mains or distribution networks combining AC and DC sections or sub-networks (arrangements using intermediate DC-AC-DC conversion H02J1/002; arrangements using high-voltage DC [HVDC] links H02J3/36) - H04W 52/22: taking into account previous information or commands - H04W 52/221: {using past power control commands} - H04W 52/545: {modifying TPC bits in special situations} - H04W 52/146: {Uplink power control} - H04W 52/248: {where transmission power control commands are generated based on a path parameter} - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract There is provided a device for filtering a stream of power control commands including power-up and power-down commands for uplink transmit power control in a wireless communication system. The device (100) includes a sequence tester (102) configured to determine whether a power-up command is immediately preceded by a sequence of consecutive power-up commands. The device also includes a command replacer (104) configured to replace, when it is determined that the power-up command is immediately preceded by a sequence of consecutive power-up commands, the power-up command with a power-down command. ## Claims ### Claim 1 A method of filtering a stream of power control commands including power-up and power-down commands for uplink transmit power control in a wireless communication system, including: determining whether a power-up command is immediately preceded by a sequence of consecutive power-up commands; replacing, when it is determined that said power-up command is immediately preceded by a sequence of consecutive power-up commands, said power-up command with a power-down command; maintaining a power-down command that is immediately preceded by a sequence of consecutive power-down commands, where said sequence of consecutive power-down commands is at least as long as said sequence of consecutive power-up commands; and wherein said filtering is asymmetric by limiting the length of sequences of consecutive power-up commands while enabling longer resulting sequences of consecutive power-down commands. ### Claim 2 (depends on 1) The method of claim 1, wherein the sequence of consecutive power-up commands is a sequence of a predetermined number N of consecutive power-up commands, where N is an integer equal to or greater than 2. ### Claim 3 (depends on 1) The method of claim 1, wherein the sequence of consecutive power-up commands is a sequence of a predetermined number N of consecutive power-up commands, where N is equal to 2. ### Claim 4 (depends on 1) The method of claim 1, wherein the length of said sequence of consecutive power-down commands has an unlimited upper bound. ### Claim 5 (depends on 1) The method of claim 1, wherein the power control commands including power-up and power-down commands are transmit power control, TPC, commands for uplink transmit power control. ### Claim 6 (depends on 5) The method of claim 5, wherein the length of said sequence of consecutive power-up commands is dependent on a TPC delay. ### Claim 7 (depends on 1) The method of claim 1, wherein the power control commands including power-up and power-down commands are intended for controlling the transmit power of user equipment, UE, for Inner Loop Power Control, ILPC. ### Claim 8 (depends on 1) The method of claim 1, wherein said filtering is performed by a base station or a user equipment, UE. ### Claim 9 A device for filtering a stream of power control commands including power-up and power-down commands for uplink transmit power control in a wireless communication system, wherein said device includes: a sequence tester configured to determine whether a power-up command is immediately preceded by a sequence of consecutive power-up commands; a command replacer configured to replace, when it is determined that said power-up command is immediately preceded by a sequence of consecutive power-up commands, said power-up command with a power-down command; wherein said device is configured to maintain a power-down command that is immediately preceded by a sequence of consecutive power-down commands, where said sequence of consecutive power-down commands is at least as long as said sequence of consecutive power-up commands; and wherein said device is an asymmetric filter configured to limit the length of sequences of consecutive power-up commands while enabling longer resulting sequences of consecutive power-down commands. ### Claim 10 (depends on 9) The device of claim 9, wherein the sequence of consecutive power-up commands is a sequence of a predetermined number N of consecutive power-up commands, where N is an integer equal to or greater than 2. ### Claim 11 (depends on 9) The device of claim 9, wherein said asymmetric filter is configured to operate as a power-up command sequence limiter in combination with a power-down command pass filter component. ### Claim 12 (depends on 9) The device of claim 9, wherein the power control commands including power-up and power-down commands are transmit power control, TPC, commands for uplink transmit power control. ### Claim 13 (depends on 9) The device of claim 9, wherein the power control commands including power-up and power-down commands control the transmit power of user equipment, UE, for Inner Loop Power Control, ILPC. ### Claim 14 (depends on 9) The device of claim 9, wherein the device comprises part of a base station. ### Claim 15 (depends on 9) The device of claim 9, wherein the device comprises part of a user equipment. ### Claim 16 A non-transitory computer readable medium having stored therein a computer program product comprising a set of instructions that, when executed by a processing circuit of a user equipment or a base station for filtering a stream of power control commands including power-up and power-down commands for uplink transmit power control in a wireless communication system, configure the processing circuit to: determine whether a power-up command is immediately preceded by a sequence of consecutive power-up commands; replace, when it is determined that said power-up command is immediately preceded by a sequence of consecutive power-up commands, said power-up command with a power-down command; maintain a power-down command that is immediately preceded by a sequence of consecutive power-down commands, where said sequence of consecutive power-down commands is at least as long as said sequence of consecutive power-up commands; and wherein said filtering is asymmetric by limiting the length of sequences of consecutive power-up commands while enabling longer resulting sequences of consecutive power-down commands. ### Claim 17 A filtering device configured for filtering a stream of transmit power control commands used for controlling uplink transmit power from a user equipment operating in a wireless communication network, said stream including a changing mix of power-up commands and power-down commands, and said filtering device comprising one or more processing circuits configured to: detect power-up commands in the stream that are immediately preceded by sequences of consecutive power-up commands having sequence lengths greater than a defined threshold; form a filtered stream for use in power control, by replacing each such detected power-up command with one or more power-down commands; maintain a power-down command that is immediately preceded by a sequence of consecutive power-down commands, where said sequence of consecutive power-down commands is at least as long as said sequence of consecutive power-up commands; and wherein said filtering is asymmetric by limiting the length of sequences of consecutive power-up commands while enabling longer resulting sequences of consecutive power-down commands.