# US 12,010,628 B2 · Power-efficient measurement reporting for multi/dual connectivity in cellular communication networks > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,010,628 B2 - Document ID: US12010628B2 - Status: Granted - Kind: B2 - Application number: 17/615,121 - Filed: 2019-06-11 - Published: 2022-07-28 - Granted: 2024-06-11 - Earliest claimed: 2019-06-11 - Assignees: Nokia Technologies Oy - Applicants: Nokia Technologies Oy - Inventors: Faranaz Sabouri-Sichani; Daniela Laselva; Mads Lauridsen - Web page: https://patentgrep.com/patent/US12010628B2 ## CPC - H04W 52/146: {Uplink power control} - H04W 52/34: TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04W 52/242: {taking into account path loss} - H04W 52/365: {Power headroom reporting} - H04W 52/386: {centralized, e.g. when the radio network controller or equivalent takes part in the power control} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract According to an example aspect of the present invention, there is provided a method for multi-connectivity, the method comprising selecting by a user equipment, based on an uplink transmission power to a first node and an uplink transmission power to at least one second node, a Radio Resource Control, RRC, connection for transmitting measurement reports and transmitting by the user equipment, using the selected RRC connection, a measurement report associated with a transmission of the first node and/or a measurement report associated with a transmission of the at least one second node. ## Claims ### Claim 1 A method for power saving in multi-connectivity, comprising: selecting by a user equipment, based on an uplink transmission power to a first node and an uplink transmission power to at least one second node, a Radio Resource Control, RRC, connection for transmitting measurement reports, wherein the user equipment compares the uplink transmission power of the first node to the uplink transmission power of the at least one second node and selects the RRC connection for transmitting to the at least one second node wherein the uplink transmission power for the first node is greater than the uplink transmission power of the at least one second node plus a hysteresis threshold, and wherein the user equipment starts a timer such that measurement reports are sent to the at least one second node at least until expiration of the timer, wherein the selecting further includes: calculating the uplink transmission power to the first node; calculating the uplink transmission power to the at least one second node; and wherein the selecting further comprises comparing the calculated uplink transmission power to the first node and the calculated uplink transmission power to the at least one second node; and transmitting by the user equipment, using the selected RRC connection, a measurement report associated with a transmission of the first node and/or a measurement report associated with a transmission of the at least one second node. ### Claim 2 (depends on 1) The method according to claim 1, wherein the selecting further comprises selecting between an RRC connection to the first node and an RRC connection to the at least one second node. ### Claim 3 (depends on 1) The method according to claim 1, wherein the selected RRC connection comprises at least one Signaling Radio Bearer, SRB. ### Claim 4 (depends on 1) The method according to claim 1, further comprising: determining that the uplink transmission power associated with the selected RRC connection is above a threshold; and responsive to the determination, transmitting using the selected RRC connection. ### Claim 5 (depends on 1) The method according to claim 1, further comprising: determining that the uplink transmission power associated with a primary RRC connection is above a threshold; and responsive to the determination, selecting the primary RRC connection and transmitting using the primary RRC connection. ### Claim 6 (depends on 1) The method according to claim 1, further comprising: determining that the uplink transmission power to the at least one second node is lower than, or lower by a threshold than, the uplink transmission power to the first node; and responsive to the determination, transmitting to the at least one second node the measurement report associated with a transmission of the first node. ### Claim 7 (depends on 1) The method according to claim 1, further comprising: applying a penalty timer, wherein the penalty timer defines a time period during which the selected RRC connection is to be used; and upon expiry of the penalty timer, enabling reselection of the RRC connection for transmitting measurement reports. ### Claim 8 (depends on 1) The method according to claim 1, further comprising: determining that the uplink transmission power to the first node is lower, or lower by a threshold, than the uplink transmission power to the at least one second node; and responsive to the determination, transmitting to the first node the measurement report associated with a transmission of the at least one second node. ### Claim 9 (depends on 1) The method according to claim 1, wherein the measurement report associated with the transmission of the first node and the measurement report associated with the transmission of the at least one second node are embedded to a single RRC message by the user equipment. ### Claim 10 (depends on 1) The method according to claim 1, wherein the first node is a master node and the at least one second node is a secondary node. ### Claim 11 An apparatus comprising at least one processing core, at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processing core, cause the apparatus at least to perform: select, by a user equipment, based on an uplink transmission power to a first node and an uplink transmission power to at least one second node, a Radio Resource Control, RRC, connection for transmitting measurement reports, wherein the user equipment compares the uplink transmission power of the first node to the uplink transmission power of the at least one second node and selects the RRC connection for transmitting to the at least one second node wherein the uplink transmission power for the first node is greater than the uplink transmission power of the at least one second node plus a hysteresis threshold, and wherein the user equipment starts a timer such that measurement reports are sent to the at least one second node at least until expiration of the timer, wherein the selecting further includes the user equipment: calculating the uplink transmission power to the first node; calculating the uplink transmission power to the at least one second node; and wherein the selecting further comprises comparing the calculated uplink transmission power to the first node and the calculated uplink transmission power to the at least one second node; and transmit, by the user equipment, using the selected RRC connection, a measurement report associated with a transmission of the first node and/or a measurement report associated with a transmission of the at least one second node.