# US 10,375,657 B2 · Method for transmitting a buffer status reporting for LTE-WLAN aggregation system and a device therefor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,375,657 B2 - Document ID: US10375657B2 - Status: Granted - Kind: B2 - Application number: 15/554,941 - Filed: 2016-04-08 - Published: 2018-02-08 - Granted: 2019-08-06 - Earliest claimed: 2015-04-18 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Seungjune Yi; Sunyoung Lee - Web page: https://patentgrep.com/patent/US10375657B2 ## CPC - H04W 52/365: {Power headroom reporting} - H04W 24/02: Arrangements for optimising operational condition - H04W 52/0229: {where the received signal is a wanted signal} - H04W 72/51: based on terminal or device properties - H04W 76/15: Setup of multiple wireless link connections - H04W 76/16: Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer - H04W 52/146: {Uplink power control} - H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range} - H04W 52/38: TPC being performed in particular situations - H04W 84/12: WLAN [Wireless Local Area Networks] - H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals - Y02D 30/70: in wireless communication networks - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for transmitting a power headroom reporting for LTE-WLAN aggregation system, the method comprising: triggering a PHR if a PHR triggering condition is met; obtaining information for power status for data transmission over LTE network; obtaining information for power status for data transmission over WLAN network; generating a PHR MAC CE including the information for power status for the LTE network and the information for power status for the WLAN network, wherein the PHR MAC CE includes an indication that the power status for data transmission over WLAN network is included or not. ## Claims ### Claim 1 A method for a User Equipment (UE) operating in a wireless communication system, the method comprising: triggering a Power Headroom Reporting (PHR) if a PHR triggering condition is met; obtaining information for power status for data transmission over a Long Term Evolution (LTE) network; generating a PHR Medium Access Control (MAC) Control Element (CE) including the information for power status for the LTE network, wherein the PHR MAC CE includes a plurality of octets, wherein a starting octet of the plurality of octets includes a 7-bit Ci field and a specific 1-bit field, wherein the Ci field corresponding to a cell index i is for the LTE network, wherein the specific 1-bit field is a least significant bit of the starting octet, which is an indication field indicating information for power status for data transmission over a Wireless Local Area Network (WLAN) network is included or not, wherein in a case that a value of the indication field is set to a first value, the PHR MAC CE includes the information for the power status for the WLAN network at a last octet of the PHR MAC CE, and wherein in a case that the value of the indication field is set to a second value, the PHR MAC CE does not includes the information of the power status for the WLAN network. ### Claim 2 (depends on 1) The method according to claim 1, wherein the power status for data transmission over the WLAN network is an actual transmission power with which the UE transmits data over the WLAN network. ### Claim 3 (depends on 2) The method according to claim 2, wherein if there is the actual transmission over the WLAN network, the power status for data transmission over the WLAN network is a difference between maximum transmit power over the WLAN network and the actual transmission power over the WLAN network, and wherein if there is not the actual transmission over the WLAN network, the power status for data transmission over the WLAN network is a difference between maximum transmit power over the WLAN network and a virtual transmission power over the WLAN network. ### Claim 4 (depends on 3) The method according to claim 3, wherein the virtual transmission power over the WLAN network is calculated as if a transmission over WLAN occurs according to a pre-defined WLAN resource allocation in a subframe for which power status is calculated. ### Claim 5 A User Equipment (UE) operating in a wireless communication system, the UE comprising: a transceiver; and a processor configured to: control the transceiver, trigger a Power Headroom Reporting (PHR) if a PHR triggering condition is met, obtain information for power status for data transmission over a Long Term Evolution (LTE) network, generate a PHR Medium Access Control (MAC) Control Element (CE) including the information for power status for the LTE network, wherein the PHR MAC CE includes a plurality of octets, wherein a starting octet of the plurality of octets includes a 7-bit Ci field and a specific 1-bit field, wherein the Ci field corresponding to a cell index i is for the LTE network, wherein the specific 1-bit field is a least significant bit of the starting octet, which is an indication field indicating information for power status for data transmission over a Wireless Local Area Network (WLAN) network is included or not, wherein in a case that a value of the indication field is set to a first value, the PHR MAC CE includes the information for the power status for the WLAN network at a last octet of the PHR MAC CE, and wherein in a case that the value of the indication field is set to a second value, the PHR MAC CE does not includes the information for the power status for the WLAN network. ### Claim 6 (depends on 5) The UE according to claim 5, wherein the power status for data transmission over the WLAN network is an actual transmission power with which the UE transmits data over the WLAN network. ### Claim 7 (depends on 6) The UE according to claim 6, wherein if there is the actual transmission over the WLAN network, the power status for data transmission over the WLAN network is a difference between maximum transmit power over the WLAN network and the actual transmission power over the WLAN network, and wherein if there is not the actual transmission over the WLAN network, the power status for data transmission over the WLAN network is a difference between maximum transmit power over the WLAN network and a virtual transmission power over the WLAN network. ### Claim 8 (depends on 7) The UE according to claim 7, wherein the virtual transmission power over the WLAN network is calculated as if a transmission over WLAN occurs according to a pre-defined WLAN resource allocation in a subframe for which power status is calculated.