# US RE50,017 E1 · Method and apparatus for transmission power control for a sounding reference signal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US RE50,017 E1 - Document ID: USRE50017E1 - Status: Granted - Kind: E1 - Application number: 17/503,831 - Filed: 2021-10-18 - Granted: 2024-06-18 - Earliest claimed: 2011-09-27 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Aris Papasakellariou; Joon-Young Cho - Web page: https://patentgrep.com/patent/USRE50017E1 ## CPC - H04W 52/146: {Uplink power control} - 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 A method and apparatus for transmitting a reference signal from a User Equipment (UE) are provided. The method includes transmitting a first reference signal using a sequence determined from an identity of the at least one transmission point and transmitting a second reference signal with a transmission power having an offset with a first maximum value configured by higher layer signaling from the at least one transmission point; and transmitting a first reference signal using a sequence configured to the UE by higher layer signaling from the at least one transmission point and transmitting a second reference signal with a transmission power having an offset with a second maximum value configured by higher layer signaling from the at least one transmission point, wherein the second maximum value is larger than the first maximum value, and the first reference signal and the second reference signal are either identical or non-identical. ## Claims ### Claim 1 A method for transmitting signals from a user equipment (UE) that receives signaling from at least one transmission point and transmits signaling to at least one reception point, the method comprising the steps of: transmitting a first reference signal using a sequence determined from an identity of the at least one transmission point; transmitting a second reference signal with a first transmission power having an offset with a first maximum value configured using first higher layer signaling received from the at least one transmission point; transmitting a third reference signal using a sequence configured to the UE using second higher layer signaling received from the at least one transmission point; and transmitting a fourth reference signal with a second transmission power having an offset with a second maximum value configured using third higher layer signaling received from the at least one transmission point, wherein the second maximum value is larger than the first maximum value. ### Claim 2 (depends on 1) The method of claim 1, wherein each of the first reference signal and the third reference signal is one of a demodulation reference signal that is associated with a physical it uplink shared channel or with a physical uplink control channel, and a sounding reference signal, and wherein each of the second reference signal and the fourth reference signal is a sounding reference signal, and wherein the transmission power offset of the second reference signal is relative to a transmission power of a signal, other than sounding reference signals, in the physical uplink shared channel. ### Claim 3 (depends on 2) The method of claim 2, wherein the sounding reference signal is transmitted periodically or dynamically. ### Claim 4 (depends on 1) The method of claim 1, further comprising: determining the first transmission power for the second reference signal by applying a first compensation factor to a first path loss estimate, the second reference signal including a sounding reference signal; and determining the second transmission power for the fourth reference signal by applying a second compensation factor to a second path loss estimate, the fourth reference signal including a sounding, reference signal. ### Claim 5 (depends on 1) The method of claim 1, wherein the sequence configured to the UE is a Zadoff-Chu sequence. ### Claim 6 (depends on 1) The method of claim 1, wherein at least one among the first reference signal, second reference signal, third reference signal, and fourth reference signal is a sounding reference signal, the transmissions power of the sounding reference signal is adjusted by a transmission power control (TPC) command provided by a downlink control information (DCI) format that includes cyclic redundancy check (CRC) bits that are scrambled by a radio network temporary identifier (RNTI). ### Claim 7 A method for transmitting signals from a user equipment (UE) in response to an indication by a field included in a downlink control information (DCI) format conveyed to the UE in a physical downlink control channel transmitted from at least one transmission point, the method comprising the steps of: transmitting a sounding reference signal with a first power determined from a first set of parameters, if the DCI format schedules data transmission to the UE; and transmitting signals on a physical uplink shared channel with a second power determined from a second set of parameters, if the DCI format schedules data transmission from the UE. ### Claim 8 (depends on 7) The method of claim 7, wherein each of the first and second sets of parameters includes a power control command. ### Claim 9 (depends on 7) The method of claim 7, wherein each of the first and second sets of parameters includes a power offset. ### Claim 10 (depends on 7) The method of claim 7, wherein the sounding reference signal reports channel state information (CSI) of the UE. ### Claim 11 A user equipment (UE) for transmitting signals, the UE receiving signaling from at least one transmission point and transmitting signaling to at least one reception point, the UE comprising: a receiver configured to receive higher layer signaling from the at least one transmission point; and a transmitter configured to: transmit a first reference signal using a sequence determined from an identity of the at least one transmission point, transmit a second reference signal with a first transmission power having an offset with a first maximum value configured using first higher layer signaling received from the at least one transmission point, transmit a third reference signal using a sequence configured by second higher layer signaling received from the at least one transmission point, and transmit a fourth reference signal with a second transmission power having an offset with a second maximum value configured using third higher layer signaling received from the at least one transmission point, wherein the second maximum value is larger than the first maximum value. ### Claim 12 (depends on 11) The UE of claim 11, wherein each of the first reference signal and the third reference signal is one of a demodulation reference signal that is associated with a physical uplink shared channel or with a physical uplink control channel, and a sounding reference signal, and wherein each of the second reference signal and the fourth reference signal is a sounding reference signal and the transmission power offset of the second reference signal is relative to a transmission power of a signal, other than sounding reference signals, in the physical uplink shared channel. ### Claim 13 (depends on 12) The UE of claim 12, wherein the sounding reference signals are transmitted periodically or dynamically. ### Claim 14 (depends on 11) The UE of claim 11, further comprising: a controller configured to determine the first transmission power for the second reference signal by applying a first compensation factor to a first path loss estimate, and to determine the second transmission power for the fourth reference signal by applying a second compensation factor to a second path loss estimate, the fourth reference signal including a sounding reference signal. ### Claim 15 (depends on 11) The UE of claim 11, wherein the sequence configured by the second higher layer signaling is a Zadoff-Chu sequence. ### Claim 16 (depends on 11) The of claim 11, wherein at least one among the first reference signal, second reference signal, third reference signal, and fourth reference signal is a sounding reference signal, the transmission power of the sounding reference signal is adjusted by a transmission power control (TPC) command provided by a downlink control information (DCI) format that includes cyclic redundancy check (CRC) bits that are scrambled by a radio network temporary identifier (RNTI). ### Claim 17 A user equipment (UE) for transmitting signals in response to an indication by a field included in a downlink control information (DCI) format conveyed in a physical downlink control channel transmitted from at least one transmission point, the UE comprising: a receiver configured to receive DCI formats is respective physical downlink control channels; and a transmitter configured to transmit a sounding reference signal with a first power determined from a first set of parameters, if a first DCI format from among tile DCI formats schedules data transmission to the UE apparatus, and to transmit signals on a physical uplink shared channel with a second power determined from a second set of parameters, if a second DCI format from among the DCI formats schedules data transmission from the UE. ### Claim 18 (depends on 17) The UE of claim 17, wherein each of the first and second sets of parameters includes a power control command. ### Claim 19 (depends on 17) The UE of claim 17, wherein each of the first and second sets of parameters includes a power offset. ### Claim 20 (depends on 17) The UE of claim 17, wherein the sounding reference signal reports channel state information (CSI) of the UE. ### Claim 21 A method for a user equipment (UE) to determine power for signal transmission, the method comprising: receiving first information about a first configuration for a first set of parameters associated with transmission of a sounding reference signal (SRS) and second information about a second configuration for a second set of parameters associated with transmission of a physical uplink shared channel (PUSCH); receiving at least one of a first downlink control information (DCI) format associated with a first power control for an SRS transmission or a second DCI format associated with a second power control for a PUSCH transmission; performing the first power control for the SRS transmission using the first set of parameters and a first transmission power control (TPC) command in the first DCI format, in case that the UE transmits the SRS; and performing the second power control for the PUSCH transmission using the second set of parameters and a second TPC command in the second DCI format, in case that the UE transmits data on the PUSCH, wherein the first set of parameters includes a first path-loss compensation factor for the first power control, and the second set of parameters includes a second path-loss compensation factor for the second power control, and wherein the first DCI format includes a first cyclic redundancy check (CRC) field scrambled by a TPC-SRS-radio network temporary identifier (RNTI), and the second DCI format includes a second CRC field scrambled by a TPC-PUSCH-RNTI. ### Claim 22 (depends on 21) The method of claim 21, wherein the first set of parameters includes the first path-loss compensation factor which is multiplied with a first downlink path-loss factor used in the first power control, and wherein the second set of parameters includes the second path-loss compensation factor which is multiplied with a second downlink path-loss factor used in the second power control. ### Claim 23 (depends on 21) The method of claim 21, wherein the first TPC command is used for a first closed-loop TPC process in the first power control, and the second TPC command is used for a second closed-loop TPC process in the second power control. ### Claim 24 A user equipment (UE), comprising: a transceiver; and a processor configured to: receive, through the transceiver, first information about a first configuration for a first set of parameters associated with transmission of a sounding reference signal (SRS) and second information about a second configuration for a second set of parameters associated with transmission of a physical uplink shared channel (PUSCH), receive, through the transceiver, at least one of a first downlink control information (DCI) format associated with a first power control for an SRS transmission or a second DCI format associated with a second power control for a PUSCH transmission, perform the first power control for the SRS transmission using the first set of parameters and a first transmission power control (TPC) command in the first DCI format, in case that the UE transmits the SRS, and perform the second power control for the PUSCH transmission using the second set of parameters and a second TPC command in the second DCI format, in case that the UE transmits data on the PUSCH, wherein the first set of parameters includes a first path-loss compensation factor for the first power control, and the second set of parameters includes a second path-loss compensation factor for the second power control, and wherein the first DCI format includes a first cyclic redundancy check (CRC) field scrambled by a TPC-SRS-radio network temporary identifier (RNTI), and the second DCI format includes a second CRC field scrambled by a TPC-PUSCH-RNTI. ### Claim 25 (depends on 24) The UE of claim 24, wherein the first set of parameters includes the first path-loss compensation factor which is multiplied with a first downlink path-loss factor used in the first power control, and wherein the second set of parameters includes the second path-loss compensation factor which is multiplied with a second downlink path-loss factor used in the second power control. ### Claim 26 (depends on 24) The UE of claim 24, wherein the first TPC command is used for a first closed-loop TPC process in the first power control, and the second TPC command is used for a second closed-loop TPC process in the second power control. ### Claim 27 A base station, comprising: a transceiver; and a processor configured to: transmit, through the transceiver, first information about a first configuration for a first set of parameters associated with transmission of a sounding reference signal (SRS) and second information about a second configuration for a second set of parameters associated with transmission of a physical uplink shared channel (PUSCH), transmit, through the transceiver, a first downlink control information (DCI) format associated with a first power control for an SRS transmission or a second DCI format associated with a second power control for a PUSCH transmission, receive, through the transceiver, the SRS by using the first set of parameters and a first transmission power control (TPC) command in the first DCI format, in case that a user equipment (UE) transmits the SRS, and receive, through the transceiver, data on the PUSCH by using the second set of parameters and a second TPC command in the second DCI format, in case that the UE transmits the data on the PUSCH, wherein the first set of parameters includes a first path-loss compensation factor for the first power control, and the second set of parameters includes a second path-loss compensation factor for the second power control, and wherein the first DCI format includes a first cyclic redundancy check (CRC) field scrambled by a TPC-SRS-radio network temporary identifier (RNTI), and the second DCI format includes a second CRC field scrambled by a TPC-PUSCH-RNTI. ### Claim 28 (depends on 27) The base station of claim 27, wherein the first set of parameters includes the first path-loss compensation factor which is multiplied with a first downlink path-loss factor used in the first power control, and wherein the second set of parameters includes the second path-loss compensation factor which is multiplied with a second downlink path-loss factor used in the second power control. ### Claim 29 (depends on 27) The base station of claim 27, wherein the first TPC command is used for a first closed-loop TPC process in the first power control, and the second TPC command is used for a second closed-loop TPC process in the second power control. ### Claim 30 A method for a base station, the method comprising: transmitting first information about a first configuration for a first set of parameters associated with transmission of a sounding reference signal (SRS) and second information about a second configuration for a second set of parameters associated with transmission of a physical uplink shared channel (PUSCH); transmitting a first downlink control information (DCI) format associated with a first power control for an SRS transmission or a second DCI format associated with a second power control for a PUSCH transmission; receiving the SRS by using the first set of parameters and a first transmission power control (TPC) command in the first DCI format, in case that a user equipment (UE) transmits the SRS; and receiving data on the PUSCH by using the second set of parameters and a second TPC command in the second DCI format, in case that the UE transmits the data on the PUSCH, wherein the first set of parameters includes a first path-loss compensation factor for the first power control, and the second set of parameters includes a second path-loss compensation factor for the second power control, and wherein the first DCI format includes a first cyclic redundancy check (CRC) field scrambled by a TPC-SRS-radio network temporary identifier (RNTI), and the second DCI format includes a second CRC field scrambled by a TPC-PUSCH-RNTI. ### Claim 31 (depends on 30) The method of claim 30, wherein the first set of parameters includes the first path-loss compensation factor which is multiplied with a first downlink path-loss factor used in the first power control, and wherein the second set of parameters includes the second path-loss compensation factor which is multiplied with a second downlink path-loss factor used in the second power control. ### Claim 32 (depends on 30) The method of claim 30, wherein the first TPC command is used for a first closed-loop TPC process in the first power control, and the second TPC command is used for a second closed-loop TPC process in the second power control.