# US 2021/0333353 A1 · Wireless Device Positioning > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0333353 A1 - Document ID: US20210333353A1 - Status: Published application - Kind: A1 - Application number: 17/272,500 - Filed: 2019-09-19 - Published: 2021-10-28 - Earliest claimed: 2018-09-26 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget LM Ericsson (publ) - Inventors: Åke Busin; Iana Siomina; Sara Modarres Razavi; Ritesh Shreevastav; Deep Shrestha; Fredrik Gunnarsson - Web page: https://patentgrep.com/patent/US20210333353A1 ## CPC - G01S 1/042: {Transmitters} - G01S 5/0257: {Hybrid positioning (by coordinating position lines of different shape G01S5/12)} - G01S 1/0428: {Signal details} - G01S 5/011: {Identifying the radio environment} - G01S 5/0244: {Accuracy or reliability of position solution or of measurements contributing thereto} - G01S 5/0278: {involving statistical or probabilistic considerations (G01S5/0252, G01S5/0294 take precedence)} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - G01S 5/0218: {Multipath in signal reception} - 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 - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A wireless device (12A) is configured to determine, for each of one or more links (14), one or more characteristics associated with wireless device positioning performance on the link. In some embodiments, the one or more characteristics include one or more of: geometric dilution of precision, GDOP, characteristics associated with the link; or line-of-sight, LOS, characteristics or non-LOS characteristics of the link. Regardless, the wireless device (12A) may also be configured to transmit control signaling (22) indicating the one or more characteristics determined for each of the one or more links (14). Based on this control signaling (22), a network node (16) may adapt positioning reference signal, PRS, configuration on at least one of the one or more links (14). ## Claims ### Claim at position 1 -32. (canceled) ### Claim 33 A method performed by a wireless device, the method comprising: determining, for each of one or more links, one or more characteristics associated with wireless device positioning performance on the link, wherein the one or more characteristics include one or more of: geometric dilution of precision (GDOP) characteristics associated with the link; or line-of-sight (LOS) characteristics or non-LOS characteristics of the link; and transmitting control signaling indicating the one or more characteristics determined for each of the one or more links. ### Claim 34 (depends on 33) The method of claim 33, wherein: the GDOP characteristics associated with the link include whether the link contributes to GDOP less than a GDOP threshold; and/or the LOS characteristics or non-LOS characteristics of the link include whether the link has a probability of being in a LOS condition above a LOS probability threshold. ### Claim 35 (depends on 33) The method of claim 33, wherein the control signaling, for each of the one or more links, indicates or depends on an extent to which positioning reference signal (PRS) transmission on the link contributes to or detracts from accuracy of wireless device positioning. ### Claim 36 (depends on 33) The method of claim 33, wherein the control signaling indicates, for each of the one or more links, a statistical measure over time of at least one of the one or more characteristics. ### Claim 37 (depends on 33) The method of claim 33, wherein said determining comprises determining the one or more characteristics for each of the one or more links by measuring a positioning reference signal (PRS) transmitted on the link according to a first PRS configuration, wherein the method further comprises: after transmitting the control signaling, receiving from a location server a second PRS configuration different than the first PRS configuration according to which the wireless device is to monitor for or measure PRS on one or more links; and monitoring for or measuring PRS according to the second PRS configuration. ### Claim 38 (depends on 33) The method of claim 33, wherein said determining comprises determining the LOS characteristics or non-LOS characteristics of each of the one or more links by correlating a positioning reference signal (PRS) transmitted on the link with a known PRS transmission. ### Claim 39 A method performed by a network node in a wireless communication network, the method comprising: receiving control signaling that, for each of one or more links, indicates one or more characteristics associated with wireless device positioning performance on the link, wherein the one or more characteristics include one or more of: geometric dilution of precision (GDOP) characteristics associated with the link; or line-of-sight (LOS) characteristics or non-LOS characteristics of the link; and based on the received control signaling, adapting positioning reference signal, PRS, configuration on at least one of the one or more links. ### Claim 40 (depends on 39) The method of claim 39, wherein: the GDOP characteristics associated with the link include whether the link contributes to GDOP less than a GDOP threshold; and/or the LOS characteristics or non-LOS characteristics of the link include whether the link has a probability of being in a LOS condition above a LOS probability threshold. ### Claim 41 (depends on 39) The method of claim 39, wherein the control signaling, for each of the one or more links, indicates or depends on an extent to which positioning reference signal (PRS) transmission on the link contributes to or detracts from accuracy of wireless device positioning. ### Claim 42 (depends on 39) The method of claim 39, wherein the control signaling indicates, for each of the one or more links, a statistical measure over time of at least one of the one or more characteristics. ### Claim 43 (depends on 39) The method of claim 39, wherein said adapting comprises adapting PRS configuration on at least one of the one or more links to transmit PRS on more radio resources on the at least one link or to reduce PRS frequency reuse, responsive to determining, based on the control signaling, that one or more of: wireless device positioning performance on the at least one link is less than a first performance threshold; at least one of the one or more characteristics is less than a first characteristic threshold; or PRS transmission on the at least one link contributes to accuracy of wireless device positioning less than a first threshold extent. ### Claim 44 (depends on 39) The method of claim 39, wherein said adapting comprises adapting PRS configuration on at least one of the one or more links to transmit PRS on fewer radio resources on the at least one link or to increase PRS frequency reuse, responsive to determining, based on the control signaling, that: wireless device positioning performance on the at least one link is greater than a second performance threshold; at least one of the one or more characteristics is greater than a second characteristic threshold; or PRS transmission on the at least one link contributes to accuracy of wireless device positioning more than a second threshold extent. ### Claim 45 (depends on 39) The method of claim 39, wherein said adapting comprises adapting PRS configuration on at least one of the one or more links to no longer transmit PRS on the at least one link, responsive to determining, based on the control signaling, that PRS transmission on the at least one link contributes to accuracy of wireless device positioning less than a third threshold extent, that wireless device positioning performance on the at least one link is less than a third performance threshold, or that at least one of the one or more characteristics is less than a third characteristic threshold. ### Claim 46 (depends on 39) The method of claim 39, wherein said adapting comprises adapting PRS configuration on at least one of the one or more links to no longer transmit PRS on the at least one link, responsive to determining, based on the control signaling, that one or more of: the at least one link contributes to a geometric dilution of precision (GDOP) being higher than a GDOP threshold; or the at least one link has a probability of being in LOS condition below a LOS probability threshold. ### Claim 47 (depends on 39) The method of claim 39, wherein said adapting comprising determining an adapted configuration of the PRS transmission on the at least one link and transmitting the adapted configuration to a radio network node that serves the at least one link. ### Claim 48 (depends on 39) The method of claim 39, wherein the network node is a radio network node that serves at least one of the one or more links, and wherein the method further comprises transmitting control signaling to a location server indicating the adapted configuration of PRS transmission on at least one of the one or more links. ### Claim 49 A wireless device comprising: communication circuitry; and processing circuitry configured to: determine, for each of one or more links, one or more characteristics associated with wireless device positioning performance on the link, wherein the one or more characteristics include one or more of: geometric dilution of precision, GDOP, characteristics associated with the link; or line-of-sight, LOS, characteristics or non-LOS characteristics of the link; and transmit control signaling indicating the one or more characteristics determined for each of the one or more links. ### Claim 50 (depends on 49) The wireless device of claim 49, wherein: the GDOP characteristics associated with the link include whether the link contributes to GDOP less than a GDOP threshold; and/or the LOS characteristics or non-LOS characteristics of the link include whether the link has a probability of being in a LOS condition above a LOS probability threshold. ### Claim 51 (depends on 49) The wireless device of claim 49, wherein the control signaling, for each of the one or more links, indicates or depends on an extent to which positioning reference signal (PRS) transmission on the link contributes to or detracts from accuracy of wireless device positioning. ### Claim 52 (depends on 49) The wireless device of claim 49, wherein the control signaling indicates, for each of the one or more links, a statistical measure over time of at least one of the one or more characteristics. ### Claim 53 (depends on 49) The wireless device of claim 49, wherein the processing circuitry is configured to determine the one or more characteristics for each of the one or more links by measuring a positioning reference signal (PRS) transmitted on the link according to a first PRS configuration, wherein the processing circuitry is further configured to: after transmitting the control signaling, receive from a location server a second PRS configuration different than the first PRS configuration according to which the wireless device is to monitor for or measure PRS on one or more links; and monitor for or measuring PRS according to the second PRS configuration. ### Claim 54 (depends on 49) The wireless device of claim 49, wherein the processing circuitry is configured to determine the LOS characteristics or non-LOS characteristics of each of the one or more links by correlating a positioning reference signal (PRS) transmitted on the link with a known PRS transmission. ### Claim 55 A network node configured for use in a wireless communication network, the network node comprising: communication circuitry; and processing circuitry configured to: receive control signaling that, for each of one or more links, indicates one or more characteristics associated with wireless device positioning performance on the link, wherein the one or more characteristics include one or more of: geometric dilution of precision, GDOP, characteristics associated with the link; or line-of-sight, LOS, characteristics or non-LOS characteristics of the link; and based on the received control signaling, adapt positioning reference signal, PRS, configuration on at least one of the one or more links. ### Claim 56 (depends on 55) The network node of claim 55, wherein: the GDOP characteristics associated with the link include whether the link contributes to GDOP less than a GDOP threshold; and/or the LOS characteristics or non-LOS characteristics of the link include whether the link has a probability of being in a LOS condition above a LOS probability threshold. ### Claim 57 (depends on 55) The network node of claim 55, wherein the control signaling, for each of the one or more links, indicates or depends on an extent to which positioning reference signal (PRS) transmission on the link contributes to or detracts from accuracy of wireless device positioning. ### Claim 58 (depends on 55) The network node of claim 55, wherein the control signaling indicates, for each of the one or more links, a statistical measure over time of at least one of the one or more characteristics.