# US 11,122,514 B2 · Transmit power determining method, processing chip, and communications device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,122,514 B2 - Document ID: US11122514B2 - Status: Granted - Kind: B2 - Application number: 16/855,686 - Filed: 2020-04-22 - Published: 2020-08-06 - Granted: 2021-09-14 - Earliest claimed: 2017-06-16 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Xi Zhang; Peng Guan; Xiaoyong Tang - Web page: https://patentgrep.com/patent/US11122514B2 ## CPC - H04W 52/14: Separate analysis of uplink or downlink - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - 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 5/006: {Quality of the received signal, e.g. BER, SNR, water filling} - H04W 52/143: {Downlink power control} - H04W 52/146: {Uplink power control} - H04W 52/16: Deriving transmission power values from another channel - H04W 52/18: TPC being performed according to specific parameters - H04W 52/325: {Power control of control or pilot channels} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A communication method is provided, including: determining, by a first device, a relative power ratio between a phase tracking reference signal (PTRS) and a data channel; determining, by the first device, a transmit power of the PTRS based on the relative power ratio of the PTRS to the data channel; and sending, by the first device, the PTRS to a second device by using the transmit power of the PTRS. ## Claims ### Claim 1 A method of wireless communication comprising: determining, by a network device, a power ratio between a phase tracking reference signal (PTRS) and a data channel according to a mapping relationship between a quantity of transport layers and the power ratio; determining, by the network device, a transmit power of the PTRS based on the power ratio; and sending, by the network device, the PTRS to a terminal device by using the transmit power of the PTRS, wherein the transmit power of the PTRS is determined according to the mapping relationship as follows: the power ratio of the PTRS to the data channel is 3 dB upon the quantity of transport layers being 2; the power ratio of the PTRS to the data channel is 4.77 dB upon the quantity of transport layers being 3; the power ratio of the PTRS to the data channel is 6 dB upon the quantity of transport layers being 4; the power ratio of the PTRS to the data channel is 7 dB upon the quantity of transport layers being 5; and the power ratio of the PTRS to the data channel is 7.78 dB upon the quantity of transport layers being 6, wherein a quantity of one or more PTRS ports for the PTRS is less than the quantity of transport layers. ### Claim 2 (depends on 1) The method according to claim 1, wherein determining the transmit power of the PTRS based on the power ratio comprises: determining, by the network device, the transmit power of the PTRS based on the power ratio and transmit power of the data channel. ### Claim 3 (depends on 1) The method according to claim 1, wherein the data channel is a physical downlink shared channel (PDSCH). ### Claim 4 (depends on 1) The method according to claim 1, wherein the network device searches within a table to determine the power ratio. ### Claim 5 (depends on 1) The method according to claim 1, wherein the network device determines the power ratio based on the quantity of transport layers. ### Claim 6 (depends on 1) The method according to claim 1, wherein the power ratio is determined in one resource element (RE), wherein the RE is a minimum unit in a time-frequency domain. ### Claim 7 A communications device comprising: a processor, configured to: determine a power ratio between a phase tracking reference signal (PTRS) and a data channel according to a mapping relationship between a quantity of transport layers and the power ratio; and determine a transmit power of the PTRS based on the power ratio; and a transmitter, configured cooperate with the processor to send the PTRS to another communications device by using the transmit power of the PTRS, wherein the transmit power of the PTRS is determined according to the mapping relationship as follows: the power ratio of the PTRS to the data channel is 3 dB upon the quantity of transport layers being 2; the power ratio of the PTRS to the data channel is 4.77 dB upon the quantity of transport layers being 3; the power ratio of the PTRS to the data channel is 6 dB upon the quantity of transport layers being 4; the power ratio of the PTRS to the data channel is 7 dB upon the quantity of transport layers being 5; and the power ratio of the PTRS to the data channel is 7.78 dB upon the quantity of transport layers when 6, wherein a quantity of one or more PTRS ports for the PTRS is less than the quantity of transport layers. ### Claim 8 (depends on 7) The communications device according to claim 7, wherein the processor is further configured to determine the transmit power of the PTRS based on the power ratio and transmit power of the data channel. ### Claim 9 (depends on 7) The communications device according to claim 7, wherein the data channel is a physical downlink shared channel (PDSCH). ### Claim 10 (depends on 7) The communications device according to claim 7, wherein the processor is further configured to search within a table to determine the power ratio. ### Claim 11 (depends on 7) The communications device according to claim 7, wherein the processor is further configured to determine the power ratio based on the quantity of transport layers. ### Claim 12 (depends on 7) The communications device according to claim 7, wherein the power ratio is determined in one resource element (RE), wherein the RE is a minimum unit in a time-frequency domain. ### Claim 13 A method of wireless communication comprising: determining, by a terminal device, a power ratio between a phase tracking reference signal (PTRS) and a data channel according to a mapping relationship between a quantity of transport layers and the power ratio; determining, by the terminal device, a transmit power of the PTRS based on the power ratio; and sending, by the terminal device, the PTRS to a network device by using the transmit power of the PTRS, wherein the transmit power of the PTRS is determined according to the mapping relationship as follows: the power ratio of the PTRS to the data channel is 3 dB upon the quantity of transport layers being 2; the power ratio of the PTRS to the data channel is 4.77 dB upon the quantity of transport layers being 3; and the power ratio of the PTRS to the data channel is 6 dB upon the quantity of transport layers being 4, wherein a quantity of one or more PTRS ports for the PTRS is less than the quantity of transport layers. ### Claim 14 (depends on 13) The method according to claim 13, wherein determining the transmit power of the PTRS based on the power ratio comprises: determining, by the terminal device, the transmit power of the PTRS based on the power ratio and transmit power of the data channel. ### Claim 15 (depends on 13) The method according to claim 13, wherein the data channel is a physical uplink shared channel (PUSCH). ### Claim 16 (depends on 13) The method according to claim 13, wherein the terminal device searches within a table to determine the power ratio. ### Claim 17 (depends on 13) The method according to claim 13, wherein the terminal device determines the power ratio based on the quantity of transport layers. ### Claim 18 (depends on 13) The method according to claim 13, wherein the power ratio is determined in one resource element (RE), wherein the RE is a minimum unit in a time-frequency domain. ### Claim 19 A communications device comprising: a processor configured to: determine a power ratio between a phase tracking reference signal (PTRS) and a data channel according to a mapping relationship between a quantity of transport layers and the power ratio; and determine a transmit power of the PTRS based on the power ratio; and a transmitter configured to cooperate with the processor to send the PTRS to another communications device by using the transmit power of the PTRS, wherein the transmit power of the PTRS is determined according to the mapping relationship as follows: the power ratio of the PTRS to the data channel is 3 dB upon the quantity of transport layers being 2; the power ratio of the PTRS to the data channel is 4.77 dB upon the quantity of transport layers being 3; and the power ratio of the PTRS to the data channel is 6 dB upon the quantity of transport layers being 4, wherein a quantity of one or more PTRS ports for the PTRS is less than the quantity of transport layers. ### Claim 20 (depends on 19) The communications device according to claim 19, wherein the processor is further configured to determine the transmit power of the PTRS based on the power ratio and transmit power of the data channel. ### Claim 21 (depends on 19) The communications device according to claim 19, wherein the data channel is a physical uplink shared channel (PUSCH). ### Claim 22 (depends on 19) The communications device according to claim 19, wherein the processor is further configured to search within a table to determine the power ratio. ### Claim 23 (depends on 19) The communications device according to claim 19, wherein the processor is further configured to determine the power ratio based on the quantity of transport layers. ### Claim 24 (depends on 19) The communications device according to claim 19, wherein the power ratio is determined in one resource element (RE), wherein the RE is a minimum unit in a time- frequency domain.