# US 12,003,444 B2 · Determining resources for phase tracking reference signals > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,003,444 B2 - Document ID: US12003444B2 - Status: Granted - Kind: B2 - Application number: 17/423,562 - Filed: 2019-01-18 - Published: 2022-04-14 - Granted: 2024-06-04 - Earliest claimed: 2019-01-18 - Assignees: Lenovo (Beijing) Limited - Applicants: Lenovo (Beijing) Limited - Inventors: Chenxi Zhu; Bingchao Liu; Wei Ling; LingLing Xiao - Web page: https://patentgrep.com/patent/US12003444B2 ## CPC - 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 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04L 5/0073: {Allocation arrangements that take into account other cell interferences} - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - H04L 5/0091: {Signalling for the administration of the divided path, e.g. signalling of configuration information} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Apparatuses, methods, and systems are disclosed for determining resources for phase tracking reference signals. One method (500) includes determining (502) a first set of resources. The first set of resources are used for non-zero power phase tracking reference signals for a first downlink transmission and zero power phase tracking reference signals for a second downlink transmission. The method (500) includes determining (504) a second set of resources. The second set of resources are used for zero power phase tracking reference signals for the first downlink transmission and non-zero power phase tracking reference signals for the second downlink transmission. The method (500) includes transmitting (506) the first downlink transmission using the first set of resources and the second set of resources. The first downlink transmission is transmitted concurrently with the second downlink transmission. ## Claims ### Claim 1 A method performed by a base station, the method comprising: determining a first set of resources, wherein the first set of resources are used for non-zero power (NZP) phase tracking reference signals (PTRS) (NZP-PTRSs) for a first downlink transmission and zero power (ZP) PTRS (ZP-PTRSs) for a second downlink transmission; determining a second set of resources, wherein the second set of resources are used for ZP-PTRSs for the first downlink transmission and NZP-PTRSs for the second downlink transmission; and transmitting, to a user equipment (UE), the first downlink transmission using the first set of resources and the second set of resources, wherein the first downlink transmission is transmitted concurrently with the second downlink transmission. ### Claim 2 (depends on 1) The method of claim 1, further comprising transmitting the second downlink transmission using the first set of resources and the second set of resources. ### Claim 3 (depends on 1) The method of claim 1, wherein the first downlink transmission and the second downlink transmission are transmitted via physical downlink shared channels. ### Claim 4 (depends on 1) The method of claim 1, wherein the first set of resources and the second set of resources are determined based on one or more parameters. ### Claim 5 (depends on 4) The method of claim 4, wherein the one or more parameters are configured via radio resource control signaling. ### Claim 6 (depends on 4) The method of claim 4, wherein the one or more parameters comprise nNZP-PTRS, nZP-PTRS, kREref-NZP, and kREref-ZP. ### Claim 7 (depends on 6) The method of claim 6, wherein nNZP-PTRS and nZP-PTRS are different. ### Claim 8 (depends on 6) The method of claim 6, wherein nNZP-PTRS and nZP-PTRS are the same. ### Claim 9 (depends on 1) The method of claim 1, wherein subcarriers corresponding to the zero power phase tracking reference signals do not carry phase tracking reference signals or data for physical downlink shared channel transmissions. ### Claim 10 (depends on 1) The method of claim 1, wherein subcarriers corresponding to the non-zero power phase tracking reference signals are configured to carry phase tracking reference signals or data for physical downlink shared channel transmissions. ### Claim 11 (depends on 10) The method of claim 10, wherein each of the subcarriers corresponding to the non-zero power phase tracking reference signals carry data for a corresponding physical downlink shared channel transmission if the respective subcarrier does not carry phase tracking reference signals for the corresponding physical downlink shared channel transmission. ### Claim 12 A base station, comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the base station to: determine a first set of resources, wherein the first set of resources are used for non-zero power (NZP) phase tracking reference signals (PTRS) (NZP-PTRSs) for a first downlink transmission and zero power (ZP) PTRS (ZP-PTRSs) for a second downlink transmission; determine a second set of resources, wherein the second set of resources are used for ZP-PTRSs for the first downlink transmission and NZP-PTRSs for the second downlink transmission; and transmit, to a user equipment (UE), the first downlink transmission using the first set of resources and the second set of resources, wherein the first downlink transmission is transmitted concurrently with the second downlink transmission. ### Claim 13 A method performed by a user equipment (UE), the method comprising: receiving a first downlink transmission using a first set of resources and a second set of resources; and receiving a second downlink transmission using the first set of resources and the second set of resources, wherein: the first downlink transmission is received concurrently with the second downlink transmission; the first set of resources are used for non-zero power (NZP) phase tracking reference signals (PTRS) (NZP-PTRSs) for the first downlink transmission and zero power (ZP) PTRS (ZP-PTRSs) for the second downlink transmission; and the second set of resources are used for ZP-PTRSs for the first downlink transmission and NZP-PTRSs for the second downlink transmission. ### Claim 14 (depends on 13) The method of claim 13, wherein the first downlink transmission and the second downlink transmission are received via physical downlink shared channels. ### Claim 15 (depends on 13) The method of claim 13, wherein the first set of resources and the second set of resources are determined based on one or more parameters. ### Claim 16 (depends on 15) The method of claim 15, wherein the one or more parameters are configured via radio resource control signaling. ### Claim 17 (depends on 15) The method of claim 15, wherein the one or more parameters comprise nNZP-PTRS, nZP-PTRS, kREref-NZP, and kREref-ZP. ### Claim 18 (depends on 13) The method of claim 13, wherein subcarriers corresponding to the zero power phase tracking reference signals do not carry phase tracking reference signals or data for physical downlink shared channel transmissions. ### Claim 19 (depends on 13) The method of claim 13, wherein subcarriers corresponding to the non-zero power phase tracking reference signals are configured to carry phase tracking reference signals or data for physical downlink shared channel transmissions. ### Claim 20 A user equipment (UE), comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the UE to: receive a first downlink transmission using a first set of resources and a second set of resources; and receive a second downlink transmission using the first set of resources and the second set of resources, wherein: the first downlink transmission is received concurrently with the second downlink transmission; the first set of resources are used for non-zero power (NZP) phase tracking reference signals (PTRS) (NZP-PTRSs) for the first downlink transmission and zero power (ZP) PTRS (ZP-PTRSs) for the second downlink transmission; and the second set of resources are used for ZP-PTRSs for the first downlink transmission and NZP-PTRSs for the second downlink transmission.