# US 2014/0192673 A1 · Uplink power controlling method and uplink signal receiving method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192673 A1 - Document ID: US20140192673A1 - Status: Published application - Kind: A1 - Application number: 14/238,024 - Filed: 2012-09-28 - Published: 2014-07-10 - Earliest claimed: 2011-09-30 - Assignees: Pantech Co., Ltd. - Applicants: Pantech Co., Ltd. - Inventors: Jian Jun Li; Jong Nam Kim - Web page: https://patentgrep.com/patent/US20140192673A1 ## CPC - H04W 52/242: {taking into account path loss} - H04B 7/024: Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems - H04L 5/0032: {Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation} - H04W 52/46: in multi-hop networks, e.g. wireless relay networks - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract The present invention relates to an uplink power control method and apparatus and an uplink signal receiving method and apparatus using the same. According to an embodiment of the present invention, there is provided a method of receiving an uplink signal, the method of including selecting receiving points in a CoMP (Coordinated Multi-Point) system, transmitting CoMP setting information to UE, and receiving uplink transmission from the UE, wherein uplink transmission power used for the uplink transmission is controlled based on an effective path loss calculated by using at least one of path losses between the UE performing the uplink transmission and points in the CoMP system. According to the present invention, when uplink transmission power control is performed in the uplink CoMP system, path losses for a plurality of receiving points are reflected so that power control may be exactly done. ## Claims ### Claim 1 A method of receiving an uplink signal, the method comprising: selecting receiving points in a Coordinated Multi-Point (CoMP) system; transmitting CoMP setting information to User Equipment (UE); and receiving uplink transmission from the UE, wherein uplink transmission power used for the uplink transmission is controlled based on an effective path loss calculated by using at least one of path losses between the UE performing the uplink transmission and points in the CoMP system. ### Claim 2 (depends on 1) The method of claim 1, wherein the CoMP setting information includes information indicating the selected receiving points, and wherein the effective path loss is calculated based on path losses for the selected receiving points. ### Claim 3 (depends on 1) The method of claim 1, wherein the CoMP setting information includes information regarding the number M of the receiving points, and wherein the effective path loss is calculated based on M path losses having the smallest value among path losses for points in the CoMP system. ### Claim 4 (depends on 1) The method of claim 1, wherein the CoMP setting information includes information regarding a path loss offset, and wherein the effective path loss is calculated based on a path loss having the smallest value among path losses for points in the CoMP system and path losses whose differences from the path loss having the smallest value are smaller than the path loss offset. ### Claim 5 (depends on 1) The method of claim 1, wherein the CoMP setting information is included in downlink control information transmitted over Physical Downlink Control Channel (PDCCH). ### Claim 6 (depends on 1) The method of claim 1, wherein the CoMP setting information is included in a Radio Resource Control (RRC) message and transmitted. ### Claim 7 A method of controlling uplink power, the method comprising: calculating path losses for transmission points in a Coordinated Multi-Point (CoMP) system; calculating an effective path loss based on at least one of the path losses; and performing uplink power control based on the effective path loss, wherein the effective path loss is calculated based on a predetermined number of reference path losses selected among the path losses. ### Claim 8 (depends on 7) The method of claim 7, wherein the reference path losses are path losses for receiving points indicated by a base station among the path losses. ### Claim 9 (depends on 7) The method of claim 7, wherein the reference path losses are path losses selected by a number indicated by a base station among the path losses. ### Claim 10 (depends on 9) The method of claim 9, wherein the reference path losses are path losses selected by a number indicated by the base station from among path losses having the smallest value of the path losses. ### Claim 11 (depends on 7) The method of claim 7, wherein the reference path losses include a predetermined standard reference path loss selected among the path losses and path losses whose differences from the standard reference path loss are smaller than an offset indicated by a base station. ### Claim 12 (depends on 11) The method of claim 11, wherein the predetermined standard reference path loss is a path loss having the smallest value among the path losses. ### Claim 13 (depends on 7) The method of claim 7, wherein the reference path losses are selected by a number indicated by a predetermined parameter from among path losses having the smallest value of the path losses. ### Claim 14 (depends on 7) The method of claim 7, wherein the reference path losses include a path loss having the smallest value among the path losses and path losses whose differences from the path loss having the smallest value are smaller than an offset indicated by a predetermined parameter. ### Claim 15 (depends on 7) The method of claim 7, wherein information to select the reference path losses is transmitted from a base station through upper layer signaling or dynamic signaling. ### Claim 16 An eNodeB (eNB) comprising: a Coordinated Multi-Point (CoMP) scheduling unit to select receiving points in a CoMP system; and a Radio Frequency (RF) unit to transmit CoMP setting information to User Equipment (UE) and to receive uplink transmission from the UE, wherein uplink transmission power used for the uplink transmission is controlled based on an effective path loss calculated by using at least one of path losses between the UE performing the uplink transmission and points in the CoMP system. ### Claim 17 (depends on 16) The eNB of claim 16, wherein the CoMP setting information includes information indicating the selected receiving points, and wherein the effective path loss is calculated based on path losses for the selected receiving points. ### Claim 18 A User Equipment (UE) comprising: a path loss calculating unit to calculate path losses for transmission points in a Coordinated Multi-Point (CoMP) system and to calculate an effective path loss based on at least one of the path losses; and a power control unit to perform uplink power control based on the effective path loss, wherein the effective path loss is calculated based on a predetermined number of reference path losses selected among the path losses. ### Claim 19 (depends on 18) The UE of claim 18, wherein the reference path losses are path losses for receiving points indicated by a base station among the path losses.