# US 2021/0243701 A1 · Method for transmitting sidelink signals through plurality of carriers in wireless communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0243701 A1 - Document ID: US20210243701A1 - Status: Published application - Kind: A1 - Application number: 17/051,256 - Filed: 2019-05-03 - Published: 2021-08-05 - Earliest claimed: 2018-05-03 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Uihyun Hong; Seungmin Lee; Hanbyul Seo - Web page: https://patentgrep.com/patent/US20210243701A1 ## CPC - H04L 5/001: {the frequencies being arranged in component carriers} - H04W 52/28: using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission - H04L 5/0058: {Allocation criteria} - H04L 5/0064: {Rate requirement of the data, e.g. scalable bandwidth, data priority} - H04W 52/281: {taking into account user or data type priority} - H04W 52/34: TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading - H04W 52/346: {distributing total power among users or channels} - H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range} - H04W 52/38: TPC being performed in particular situations - H04W 52/383: {power control in peer-to-peer links} - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04W 72/12: Wireless traffic scheduling - H04W 92/18: between terminal devices - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Provided is a method for a terminal to transmit sidelink signals in a wireless communication system according to one embodiment of the present invention, comprising the steps of: determining transmission power of a sidelink packet in each of a plurality of carriers; and on the basis of the determined transmission power, transmitting the sidelink signals through one or more carriers of the plurality of the carriers, wherein the transmission power is determined on the basis of a priority of the sidelink packet scheduled for transmission on each of the plurality of carriers, a sum of the transmission power of the sidelink packet scheduled for transmission on each of the plurality of carriers, and maximum transmission power of the terminal. The UE is capable of communicating with at least one of another UE, a UE related to an autonomous driving vehicle, the BS or a network. ## Claims ### Claim 1 A method of transmitting a sidelink signal by a user equipment (UE) in a wireless communication system, the method comprising: determining a transmission power of a sidelink packet for each of a plurality of carriers; and transmitting the sidelink signal on at least one carrier among the plurality of carriers based on the determined transmission power, wherein the transmission power is determined based on priorities of sidelink packets scheduled to be respectively transmitted on the plurality of carriers, a sum of transmission powers of the sidelink packets scheduled to be respectively transmitted on the plurality of carriers, and a maximum transmission power of the UE. ### Claim 2 (depends on 1) The method of claim 1, wherein transmission resources of the sidelink packets scheduled to be respectively transmitted on the plurality of carriers overlap at least partially in a time domain. ### Claim 3 (depends on 2) The method of claim 2, wherein based on that the sum of the transmission powers of the sidelink packets scheduled to be respectively transmitted on the plurality of carriers exceeds the maximum transmission power, first transmission power adjustment is performed, and wherein the first transmission power adjustment reduces transmission powers of packets except a packet with a highest priority among the sidelink packets scheduled to be respectively transmitted on the plurality of carriers. ### Claim 4 (depends on 3) The method of claim 3, wherein the transmission powers of the packets except the packet with the highest priority are reduced at a same rate or at different rates. ### Claim 5 (depends on 3) The method of claim 3, wherein the transmission powers of the packets except the packet with the highest priority are reduced sequentially from a packet with a lowest priority. ### Claim 6 (depends on 3) The method of claim 3, wherein the first transmission power adjustment is performed until the sum of the transmission powers of the sidelink packets scheduled to be respectively transmitted on the plurality of carriers after the transmission power adjustment becomes less than or equal to the maximum transmission power. ### Claim 7 (depends on 3) The method of claim 3, wherein based on that the sum of the transmission powers of the sidelink packets scheduled to be respectively transmitted on the plurality of carriers is more than the maximum transmission power after the transmission powers of the packets except the packet with the highest priority are reduced to zero, second transmission power adjustment for reducing transmission powers of all packets is performed. ### Claim 8 (depends on 7) The method of claim 7, wherein the transmission powers of all packets are reduced at a same rate or at different rates. ### Claim 9 (depends on 2) The method of claim 2, wherein based on that the sum of the transmission powers of the sidelink packets scheduled to be respectively transmitted on the plurality of carriers exceeds the maximum transmission power, third transmission power adjustment is performed, and wherein the third transmission power adjustment reduces a transmission power of a packet with a lowest priority among the sidelink packets scheduled to be respectively transmitted on the plurality of carriers until the sum of the transmission powers of the sidelink packets scheduled to be respectively transmitted on the plurality of carriers becomes less than or equal to the maximum transmission power. ### Claim 10 (depends on 9) The method of claim 9, wherein the third transmission power adjustment is sequentially performed from the packet with the lowest priority until the sum of the transmission powers of the sidelink packets scheduled to be respectively transmitted on the plurality of carriers becomes less than or equal to the maximum transmission power is performed. ### Claim 11 An apparatus for transmitting a sidelink signal in a wireless communication system, the apparatus comprising: a memory; and a processor coupled to the memory, wherein the processor is configured to determine a transmission power of a sidelink packet for each of a plurality of carriers and transmit the sidelink signal on at least one carrier among the plurality of carriers based on the determined transmission power, and wherein the transmission power is determined based on priorities of sidelink packets scheduled to be respectively transmitted on the plurality of carriers, a sum of transmission powers of the sidelink packets scheduled to be respectively transmitted on the plurality of carriers, and a maximum transmission power of the apparatus. ### Claim 12 (depends on 11) The apparatus of claim 11, wherein transmission resources of the sidelink packets scheduled to be respectively transmitted on the plurality of carriers overlap in a time domain. ### Claim 13 (depends on 11) The apparatus of claim 11, wherein the apparatus communicates with at least one of a mobile terminal, a network, or an autonomous driving vehicle other than the apparatus. ### Claim 14 (depends on 11) The apparatus of claim 11, wherein the apparatus is capable of communicating with at least one of another UE, a UE related to an autonomous driving vehicle, the BS or a network.