# US 2019/0379481 A1 · Phase tracking reference signal indication in multi-user superposition transmission > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0379481 A1 - Document ID: US20190379481A1 - Status: Published application - Kind: A1 - Application number: 16/478,813 - Filed: 2018-02-20 - Published: 2019-12-12 - Earliest claimed: 2017-02-17 - Assignees: Intel IP Corporation - Applicants: Intel IP Corporation - Inventors: Yushu Zhang; Gang Xiong; Alexei Davydov; Guotong Wang - Web page: https://patentgrep.com/patent/US20190379481A1 ## CPC - H04L 1/001: {applied to control information} - H04L 27/3488: {Multiresolution systems} - 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 5/0094: {Indication of how sub-channels of the path are allocated} - H04L 27/261: {Details of reference signals} - H04L 27/2675: {Pilot or known symbols} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 25/0226: {sounding signals per se} - H04L 27/2657: {Carrier synchronisation} - 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 Described is an apparatus of an Evolved Node-B (eNB) operable to communicate with a User Equipment (UE) on a wireless network. The apparatus may comprise a first circuitry and a second circuitry. The first circuitry may be operable to determine a presence of a Phase Tracking Reference Signal (PT-RS) and a density of the PT-RS. The second circuitry may be operable to process the PT-RS. The second circuitry may also be operable to process a transmission in a Multi-User Superposition Transmission (MUST) operation in accordance with the PT-RS. ## Claims ### Claim at position 1 1-24. (canceled) ### Claim 25 An apparatus of a User Equipment (UE) operable to communicate with an Evolved Node-B (eNB) on a wireless network, comprising: one or more processors to: determine a presence of a Phase Tracking Reference Signal (PT-RS) and a density of the PT-RS; process the PT-RS; and process a transmission in a Multi-User Superposition Transmission (MUST) operation in accordance with the PT-RS, and an interface for receiving the PT-RS and the transmission in the MUST operation from a receiving circuitry. ### Claim 26 (depends on 25) The apparatus of claim 25, wherein at least one of the presence of the PT-RS and the density of the PT-RS is determined at least in part by a Far-UE indicator. ### Claim 27 (depends on 6) The apparatus of claim 06, wherein the Far-UE indicator is carried by one of: a Downlink Control Information (DCI) transmission; or a higher-layer signaling transmission. ### Claim 28 (depends on 6) The apparatus of claim 06, wherein the Far-UE indicator is jointly coded with a Modulation and Coding Scheme (MCS) indicator. ### Claim 29 (depends on 28) The apparatus of claim 28, wherein the MCS indicator is carried by a Downlink Control Information (DCI) transmission. ### Claim 30 (depends on 6) The apparatus of claim 06, wherein the Far-UE indicator is determined based upon a search space indicator. ### Claim 31 Machine readable storage media having machine executable instructions that, when executed, cause one or more processors of a User Equipment (UE) operable to communicate with an Evolved Node-B (eNB) on a wireless network to perform an operation comprising: determine a presence of a Phase Tracking Reference Signal (PT-RS) and a density of the PT-RS; process the PT-RS; and process a transmission in a Multi-User Superposition Transmission (MUST) operation in accordance with the PT-RS. ### Claim 32 (depends on 31) The machine readable storage media of claim 31, wherein at least one of the presence of the PT-RS and the density of the PT-RS is determined at least in part by a Far-UE indicator. ### Claim 33 (depends on 32) The machine readable storage media of claim 32, wherein the Far-UE indicator is carried by one of: a Downlink Control Information (DCI) transmission; or a higher-layer signaling transmission. ### Claim 34 (depends on 32) The machine readable storage media of claim 32, wherein the Far-UE indicator is jointly coded with a Modulation and Coding Scheme (MCS) indicator. ### Claim 35 (depends on 34) The machine readable storage media of claim 34, wherein the MCS indicator is carried by a Downlink Control Information (DCI) transmission. ### Claim 36 (depends on 32) The machine readable storage media of claim 32, wherein the Far-UE indicator is determined based upon a search space indicator. ### Claim 37 An apparatus of an Evolved Node-B (eNB) operable to communicate with a User Equipment (UE) on a wireless network, comprising: one or more processors to: establish a use of a Phase Tracking Reference Signal (PT-RS) and a density of the PT-RS; generate the PT-RS; and generate a transmission in a Multi-User Superposition Transmission (MUST) operation in accordance with the PT-RS, and an interface for sending the PT-RS and the transmission in the MUST operation to a transmission circuitry. ### Claim 38 (depends on 37) The apparatus of claim 37, wherein at least one of the use of the PT-RS and the density of the PT-RS is indicated at least in part by a Far-UE indicator. ### Claim 39 (depends on 38) The apparatus of claim 38, wherein the Far-UE indicator is carried by one of: a Downlink Control Information (DCI) transmission; or a higher-layer signaling transmission. ### Claim 40 (depends on 38) The apparatus of claim 38, wherein the Far-UE indicator is jointly coded with a Modulation and Coding Scheme (MCS) indicator. ### Claim 41 (depends on 40) The apparatus of claim 40, wherein the MCS indicator is carried by a Downlink Control Information (DCI) transmission. ### Claim 42 (depends on 38) The apparatus of claim 38, wherein the Far-UE indicator is indicated by a search space indicator. ### Claim 43 Machine readable storage media having machine executable instructions that, when executed, cause one or more processors of an Evolved Node-B (eNB) operable to communicate with a User Equipment (UE) on a wireless network to perform an operation comprising: establish a use of a Phase Tracking Reference Signal (PT-RS) and a density of the PT-RS; generate the PT-RS; and generate a transmission in a Multi-User Superposition Transmission (MUST) operation in accordance with the PT-RS. ### Claim 44 (depends on 43) The machine readable storage media of claim 43, wherein at least one of the use of the PT-RS and the density of the PT-RS is indicated at least in part by a Far-UE indicator. ### Claim 45 (depends on 44) The machine readable storage media of claim 44, wherein the Far-UE indicator is carried by one of: a Downlink Control Information (DCI) transmission; or a higher-layer signaling transmission. ### Claim 46 (depends on 44) The machine readable storage media of claim 44, wherein the Far-UE indicator is jointly coded with a Modulation and Coding Scheme (MCS) indicator. ### Claim 47 (depends on 46) The machine readable storage media of claim 46, wherein the MCS indicator is carried by a Downlink Control Information (DCI) transmission. ### Claim 48 (depends on 44) The machine readable storage media of claim 44, wherein the Far-UE indicator is indicated by a search space indicator.