# US 2018/0323933 A1 · Apparatus and method for effective ptrs operation and indication 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 2018/0323933 A1 - Document ID: US20180323933A1 - Status: Published application - Kind: A1 - Application number: 15/971,763 - Filed: 2018-05-04 - Published: 2018-11-08 - Earliest claimed: 2017-05-04 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Hyungju NAM; Hyunil YOO; Yongok KIM; Taeyoung KIM; Jeehwan NOH - Web page: https://patentgrep.com/patent/US20180323933A1 ## CPC - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04W 72/12: Wireless traffic scheduling - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - 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 The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present disclosure proposes a PTRS operation and indication method for phase noise compensation in a wireless communication system. Specifically, disclosed is a method for configuring and indicating a suitable PTRS for a signal transmission environment through information exchange between a base station and a terminal having different oscillator characteristics. ## Claims ### Claim 1 A method for receiving a phase tracking reference signal (PTRS) by a terminal, the method comprising: receiving, from a base station on higher layer signaling, information about the PTRS; receiving, from the base station on a physical downlink control channel (PDCCH), information that indicates information used for receiving the PTRS from among the information about the PTRS; and receiving, from the base station, the PTRS based on the information used for receiving the PTRS. ### Claim 2 (depends on 1) The method of claim 1, wherein the information about the PTRS includes information on a time density of the PTRS and information on a frequency density of the PTRS. ### Claim 3 (depends on 1) The method of claim 1, further comprising: transmitting, to the base station, information about a number of PTRS antenna ports. ### Claim 4 (depends on 3) The method of claim 3, wherein the information on the number of PTRS antenna ports is determined based on a number of oscillators in the terminal. ### Claim 5 (depends on 1) The method of claim 1, wherein the information about the PTRS includes information about whether a mapping of the PTRS is distributed or localized. ### Claim 6 A method for transmitting a phase tracking reference signal (PTRS) by a base station, the method comprising: transmitting, to a terminal on higher layer signaling, information about the PTRS; transmitting, to the terminal on a physical downlink control channel (PDCCH), information that indicates information used for transmitting the PTRS from among the information about the PTRS; and transmitting, to the terminal, the PTRS based on the information used for transmitting the PTRS. ### Claim 7 (depends on 6) The method of claim 6, wherein the information about the PTRS includes information on a time density of the PTRS and information on a frequency density of the PTRS. ### Claim 8 (depends on 6) The method of claim 6, further comprising: receiving, from the terminal, information about a number of PTRS antenna ports. ### Claim 9 (depends on 8) The method of claim 8, wherein the information on the number of PTRS antenna ports is determined based on a number of oscillators in the terminal. ### Claim 10 (depends on 6) The method of claim 6, wherein the information about the PTRS includes information about whether a mapping of the PTRS is distributed or localized. ### Claim 11 A terminal for receiving a phase tracking reference signal (PTRS), the terminal comprising: a transceiver; and a controller configured to: control the transceiver to receive, from a base station on higher layer signaling, information about the PTRS, control the transceiver to receive, from the base station on a physical downlink control channel (PDCCH), information that indicates information used for receiving the PTRS from among the information about the PTRS, and control the transceiver to receive, from the base station, the PTRS based on the information used for receiving the PTRS. ### Claim 12 (depends on 11) The terminal of claim 11, wherein the information about the PTRS includes information on a time density of the PTRS and information on a frequency density of the PTRS. ### Claim 13 (depends on 11) The terminal of claim 11, wherein the controller is further configured to control the transceiver to transmit, to the base station, information about a number of PTRS antenna ports. ### Claim 14 (depends on 13) The terminal of claim 13, wherein the information on the number of PTRS antenna ports is determined based on a number of oscillators in the terminal. ### Claim 15 (depends on 11) The terminal of claim 11, wherein the information about the PTRS includes information about whether a mapping of the PTRS is distributed or localized. ### Claim 16 A base station for transmitting a phase tracking reference signal (PTRS), the base station comprising: a transceiver; and a controller configured to: control the transceiver to transmit, to a terminal on higher layer signaling, information about the PTRS, control the transceiver to transmit, to the terminal on a physical downlink control channel (PDCCH), information that indicates information used for transmitting the PTRS from among the information about the PTRS; and control the transceiver to transmit, to the terminal, the PTRS based on the information used for transmitting the PTRS. ### Claim 17 (depends on 16) The base station of claim 16, wherein the information about the PTRS includes information on a time density of the PTRS and information on a frequency density of the PTRS. ### Claim 18 (depends on 16) The base station of claim 16, wherein the controller is further configured to control the transceiver to receive, from the terminal, information about a number of PTRS antenna ports. ### Claim 19 (depends on 16) The base station of claim 16, wherein the information on the number of PTRS antenna ports is determined based on a number of oscillators in the terminal. ### Claim 20 (depends on 16) The base station of claim 16, wherein the information about the PTRS includes information about whether a mapping of the PTRS is distributed or localized.