# US 2021/0239783 A1 · System and Method for Determining Line of Sight (LOS) > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0239783 A1 - Document ID: US20210239783A1 - Status: Published application - Kind: A1 - Application number: 17/198,934 - Filed: 2021-03-11 - Published: 2021-08-05 - Earliest claimed: 2018-09-28 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: George Calcev; Philippe Sartori; Weimin Xiao - Web page: https://patentgrep.com/patent/US20210239783A1 ## CPC - G01S 11/08: using synchronised clocks - G01S 5/0215: {Interference} - H04B 7/10: Polarisation diversity; Directional diversity - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - H04B: TRANSMISSION ## Abstract A method performed by a first device includes communicating, with a second device, a LOS determination request including a dual polarization procedure indicator indicating a dual polarization procedure is used in LOS characterization of a transmission between the first device and the second device, measuring a first signal on a first resource of a channel, and measuring a second signal on a second resource of the channel, with the first and second signals comprising a single bit sequence with orthogonal polarizations and are multiplexed in a frequency domain or a code domain. ## Claims ### Claim 1 A method performed by a first device, the method comprising: communicating, by the first device, with a second device, a line of sight (LOS) determination request including a dual polarization procedure indicator indicating a dual polarization procedure is used in LOS characterization of a transmission between the first device and the second device; measuring, by the first device, a first signal on a first resource of a channel; and measuring, by the first device, a second signal on a second resource of the channel, with the first and second signals comprising a single bit sequence with orthogonal polarizations and are multiplexed in a frequency domain or a code domain. ### Claim 2 (depends on 1) The method of claim 1, measuring the first signal comprising measuring, by the first device, a linear average of the power contributions of the first resource conveying the first signal, and measuring the second signal comprising measuring, by the first device, a linear average of the power contributions of the second resource conveying the second signal. ### Claim 3 (depends on 1) The method of claim 1, further comprising transmitting, by the first device, to the second device, a measurement of the first signal and a measurement of the second signal. ### Claim 4 (depends on 1) The method of claim 1, further comprising receiving, by the first device, from the second device, the LOS characterization of the transmission. ### Claim 5 (depends on 1) The method of claim 1, further comprising: determining, by the first device, that a difference between a measurement of the first signal and a measurement of the second signal meets a specified threshold, and based thereon, determining, by the first device, that the LOS characterization of the transmission comprises a LOS transmission. ### Claim 6 (depends on 1) The method of claim 1, further comprising: determining, by the first device, a difference between a measurement of the first signal and a measurement of the second signal does not meet a specified threshold, and based thereon, determining, by the first device, that the LOS characterization of the transmission comprises a non-LOS (NLOS) transmission. ### Claim 7 (depends on 1) The method of claim 1, further comprising transmitting, by the first device, the LOS characterization of the transmission. ### Claim 8 (depends on 1) The method of claim 1, measuring the first signal or measuring the second signal comprises measuring a reference signal received power (RSRP) value or a reference signal received quality (RSRQ) value. ### Claim 9 (depends on 1) The method of claim 1, communicating the LOS determination request comprises transmitting the LOS determination request or receiving the LOS determination request. ### Claim 10 (depends on 1) The method of claim 1, the first device comprising a user equipment (UE), and the second device comprising an access node. ### Claim 11 (depends on 1) The method of claim 1, the LOS determination request further comprises a measurement gap specifying a location of the first and second resources. ### Claim 12 (depends on 1) The method of claim 1, the LOS determination request further comprises a first measurement gap specifying a location of the first resource, and a second measurement gap specifying a location of the second resource. ### Claim 13 (depends on 1) The method of claim 1, the first and second signals are scrambled with different orthogonal codes. ### Claim 14 A method performed by a first device, the method comprising: communicating, by the first device, with a second device, a line of sight (LOS) determination request including a dual polarization procedure indicator indicating a dual polarization procedure is used in LOS characterization of a transmission between the first device and the second device; transmitting, by the first device, a first signal on a first resource of a channel; and transmitting, by the first device, a second signal on a second resource of the channel, with the first and second signals comprising a single bit sequence with orthogonal polarization and are multiplexed in a frequency domain or a code domain. ### Claim 15 (depends on 14) The method of claim 14, further comprising receiving, by the first device, from the second device, a measurement of the first signal and a measurement of the second signal. ### Claim 16 (depends on 15) The method of claim 15, further comprising: determining, by the first device, that a difference between the measurement of the first signal and the measurement of the second signal meets a specified threshold, and based thereon, determining, by the first device, that the LOS characterization of the transmission comprises a LOS transmission. ### Claim 17 (depends on 15) The method of claim 15, further comprising: determining, by the first device, that a difference between the measurement of the first signal and the measurement of the second signal does not meet a specified threshold, and based thereon, determining, by the first device, that the LOS characterization of the transmission comprises a non-LOS (NLOS) transmission. ### Claim 18 (depends on 16) The method of claim 16, further comprising transmitting, by the first device, the LOS characterization of the transmission. ### Claim 19 (depends on 14) The method of claim 14, further comprising receiving, by the first device, from the second device, a LOS characterization of the channel. ### Claim 20 (depends on 14) The method of claim 14, communicating the LOS determination request comprises transmitting the LOS determination request or receiving the LOS determination request. ### Claim 21 A first device comprising: a non-transitory memory storage comprising instructions; and one or more processors in communication with the memory storage, the one or more processors execute the instructions to: communicate, with a second device, a line of sight (LOS) determination request including a dual polarization procedure indicator indicating a dual polarization procedure is used in LOS characterization of a transmission between the first device and the second device, measure a first signal on a first resource of a channel, and measure a second signal on a second resource of the channel, with the first and second signals comprising a single bit sequence with orthogonal polarizations and are multiplexed in a frequency domain or a code domain. ### Claim 22 (depends on 21) The first device of claim 21, the one or more processors further execute the instructions to transmit, to the second device, a measurement of the first signal and a measurement of the second signal. ### Claim 23 (depends on 21) The first device of claim 21, the one or more processors further execute the instructions to receive, from the second device, the LOS characterization of the transmission. ### Claim 24 (depends on 21) The first device of claim 21, the one or more processors further execute the instructions to determine that a difference between a measurement of the first signal and a measurement of the second signal meets a specified threshold, and based thereon determine that the LOS characterization of the transmission comprises a LOS transmission. ### Claim 25 (depends on 21) The first device of claim 21, the one or more processors further execute the instructions to determine a difference between a measurement of the first signal and a measurement of the second signal does not meet a specified threshold, and based thereon determine that the LOS characterization of the transmission comprises a non-LOS (NLOS) transmission. ### Claim 26 (depends on 21) The first device of claim 21, the one or more processors further execute the instructions to transmit the LOS characterization of the transmission. ### Claim 27 (depends on 21) The first device of claim 21, the one or more processors further execute the instructions to transmit the LOS determination request or receive the LOS determination request. ### Claim 28 A first device comprising: a non-transitory memory storage comprising instructions; and one or more processors in communication with the memory storage, the one or more processors execute the instructions to: communicate, with a second device, a line of sight (LOS) determination request including a dual polarization procedure indicator indicating a dual polarization procedure is used in LOS characterization of a transmission between the first device and the second device, transmit a first signal on a first resource of a channel, and transmit a second signal on a second resource of the channel, with the first and second signals comprising a single bit sequence with orthogonal polarization and are multiplexed in a frequency domain or a code domain. ### Claim 29 (depends on 28) The first device of claim 28, the one or more processors further execute the instructions to receive, from the second device, a measurement of the first signal and a measurement of the second signal. ### Claim 30 (depends on 29) The first device of claim 29, the one or more processors further execute the instructions to determine that a difference between the measurement of the first signal and the measurement of the second signal meets a specified threshold, and based thereon, determine that the LOS characterization of the transmission comprises a LOS transmission. ### Claim 31 (depends on 29) The first device of claim 29, the one or more processors further execute the instructions to determine that a difference between the measurement of the first signal and the measurement of the second signal does not meet a specified threshold, and based thereon, determine that the LOS characterization of the transmission comprises a non-LOS (NLOS) transmission. ### Claim 32 (depends on 30) The first device of claim 30, the one or more processors further execute the instructions to transmit the LOS characterization of the transmission. ### Claim 33 (depends on 28) The first device of claim 28, the one or more processors further execute the instructions to receive, from the second device, a LOS characterization of the channel.