Timing-Based Positioning Accuracy
There are provided measures for enabling an improvement of timing-based positioning accuracy. Such measures may exemplarily include determining a delay value of a receiver path, via which a positioning-related signal is received, on the basis of at least one reception parameter, measuring a timing value for timing-based positioning calculation on the basis of the received positioning-related signal, and correcting the measured timing value on the basis of the determined delay value of the receiver path
1 . A method comprising:
determining a delay value of a receiver path, via which a positioning-related signal is received, on the basis of at least one reception parameter,
measuring a timing value for timing-based positioning calculation on the basis of the received positioning-related signal, and
correcting the measured timing value on the basis of the determined delay value of the receiver path,
wherein the at least one reception parameter comprises an operating bandwidth.
2 . The method according to claim 1 , wherein the step of determining the delay value of the receiver path comprises:
detecting the at least one reception parameter used in receiving the positioning-related signal,
identifying a receiver path configuration corresponding to the detected at least one reception parameter, and
deciding the delay value on the basis of the identified receiver path configuration.
3 . The method according to claim 2 , wherein
the delay value is decided on the basis of the identified receiver path configuration by using a relationship defined on the basis of at least one of a mathematical model and performance measurement results, and/or
the delay value is decided by looking up the delay value as a function of the identified receiver path configuration in a look-up table, and/or
the receiver path configuration is identified by looking up the receiver path configuration as a function of the detected at least one reception parameter in a look-up table.
4 . (canceled)
5 . The method according to claim 1 , wherein
the method further comprises signaling the corrected timing value towards a network side for timing-based positioning calculation, wherein the signaled corrected timing value relates to the receiver path via which the positioning-related signal is received, or the signaled corrected timing value relates to the receiver path of multiple receiver paths via which the positioning-related signal is received, which exhibits the best timing accuracy among the multiple receiver paths, or the signaled corrected timing value is weighted with a weight being indicative of the timing accuracy of the receiver path via which the positioning-related signal is received, and/or
the timing value comprises an observed time difference of arrival with respect to a reference cell, and/or
the positioning-related signal comprises a positioning reference signal from one of a serving cell and a neighboring cell.
6 . The method according to claim 1 , wherein
the method further comprises utilizing the corrected timing value for timing-based positioning calculation, wherein the utilized corrected timing value relates to the receiver path via which the positioning-related signal is received, or the utilized corrected timing value relates to the receiver of multiple receiver paths via which the positioning-related signal is received, which exhibits the best timing accuracy among the multiple receiver paths, or the utilized corrected timing value is weighted with a weight being indicative of the timing accuracy of the receiver path via which the positioning-related signal is received, and/or
the timing value comprises a signal propagation time with respect to a positioning satellite, and/or
the positioning-related signal comprises a positioning reference signal from a positioning satellite.
7 . The method according to claim 1 , further comprising
estimating a residual timing error between the corrected timing value and an actual timing value, and
signaling the estimated residual timing error towards a network side for timing-based positioning calculation or utilizing the estimated residual timing error for timing-based positioning calculation.
8 . The method according to claim 1 , wherein the timing value is measured by using one of an intra-frequency or single-carrier measurement, an inter-frequency or multiple-carrier measurement and a measurement on carrier aggregation components, and/or
the delay value of the receiver path represents a delay caused by receiver hardware and/or software between a reference point for timing value measurement and a point of timing value measurement in the receiver path.
9 . The method according to claim 1 , wherein
the method is operable at or by a terminal, user equipment, mobile station or modem, and/or
the method is operable in at least one of a LTE and a LTE-A cellular system.
10 . An apparatus comprising:
at least one processor,
at least one memory including computer program code, and
at least one interface configured for communication with at least another apparatus,
the at least one processor, with the at least one memory and the computer program code, being configured to cause the apparatus to:
determine a delay value of a receiver path, via which a Reply to Office Action dated February 8 , 2013 positioning-related signal is received, on the basis of at least one reception parameter,
measure a timing value for timing-based positioning calculation on the basis of the received positioning-related signal, and
correct the measured timing value on the basis of the determined delay value of the receiver path,
wherein the at least one reception parameter comprises.
11 . The apparatus according to claim 10 , wherein the at least one processor, with the at least one memory and the computer program code, is configured to cause the apparatus to:
detect the at least one reception parameter used in receiving the positioning-related signal,
identify a receiver path configuration corresponding to the detected at least one reception parameter, and
decide the delay value on the basis of the identified receiver path configuration.
12 . The apparatus according to claim 11 , wherein the at least one processor, with the at least one memory and the computer program code, is configured to cause the apparatus to:
decide the delay value on the basis of the identified receiver path configuration by using a relationship defined on the basis of at least one of a mathematical model and performance measurement results, and/or
decide the delay value by looking up the delay value as a function of the identified receiver path configuration in a look-up table, and/or
identify the receiver path configuration by looking up the receiver path configuration as a function of the detected at least one reception parameter in a look-up table.
13 . (canceled)
14 . The apparatus according to claim 10 , wherein the at least one processor, with the at least one memory and the computer program code, is configured to cause the apparatus to signal the corrected timing value towards a network side for timing-based positioning calculation,
wherein the signaled corrected timing value relates to the receiver path via which the positioning-related signal is received, or the signaled corrected timing value relates to the receiver path of multiple receiver paths via which the positioning-related signal is received, which exhibits the best timing accuracy among the multiple receiver paths, or the signaled corrected timing value is weighted with a weight being indicative of the timing accuracy of the receiver path via which the positioning-related signal is received, and/or
the timing value comprises an observed time difference of arrival with respect to a reference cell, and/or
the positioning-related signal comprises a positioning reference signal from one of a serving cell and a neighboring cell.
15 . The apparatus according to claim 10 , wherein the at least one processor, with the at least one memory and the computer program code, is configured to cause the apparatus to utilize the corrected timing value for timing-based positioning calculation,
wherein the utilized corrected timing value relates to the receiver path via which the positioning-related signal is received, or the utilized corrected timing value relates to the receiver path of multiple receiver paths via which the positioning-related signal is received, which exhibits the best timing accuracy among the multiple receiver paths, or the utilized corrected timing value is weighted with a weight being indicative of the timing accuracy of the receiver path via which the positioning-related signal is received, and/or
the timing value comprises a signal propagation time with respect to a positioning satellite, and/or
the positioning-related signal comprises a positioning reference signal from a positioning satellite.
16 . The apparatus according to claim 10 , wherein the at least one processor, with the at least one memory and the computer program code, is configured to cause the apparatus to:
estimate a residual timing error between the corrected timing value and an actual timing value, and
signal the estimated residual timing error towards a network side for timing-based positioning calculation or utilize the estimated residual timing error for timing-based positioning calculation.
17 . The apparatus according to claim 10 , wherein the at least one processor, with the at least one memory and the computer program code, is configured to measure the timing value by using one of an intra-frequency or single-carrier measurement, an inter-frequency or multiple-carrier measurement and a measurement on carrier aggregation components, and/or
the delay value of the receiver path represents a delay caused by receiver hardware and/or software between a reference point for timing value measurement and a point of timing value measurement in the receiver path.
18 . The apparatus according to claim 10 , wherein
the apparatus is operable as or at a terminal, user equipment, mobile station or modem, and/or
the apparatus is operable in at least one of a LTE and a LTE-A cellular system.
19 . A non-transitory computer readable storage medium comprising computer-executable computer program code which, when the program code is run on a computer, is configured to cause the computer to carry out the method according to claim 1 .
20 . (canceled)
21 . The method according to claim 1 , wherein the at least one reception parameter further comprises a number of subcarriers at an operating bandwidth.
22 . The method according to claim 1 , wherein the at least one reception parameter further comprises an active receiver function setup.
23 . The method according to claim 1 , wherein the at least one reception parameter further comprises an active receiver front-end setup.
24 . The apparatus according to claim 10 , wherein the at least one reception parameter further comprises a number of subcarriers at an operating bandwidth.
25 . The apparatus according to claim 10 , wherein the at least one reception parameter further comprises an active receiver function setup.
26 . The apparatus according to claim 10 , wherein the at least one reception parameter further comprises an active receiver front-end setup.
27 . A method comprising:
determining a delay value of a receiver path, via which a positioning-related signal is received, on the basis of at least one reception parameter,
measuring a timing value for timing-based positioning calculation on the basis of the received positioning-related signal, and
correcting the measured timing value on the basis of the determined delay value of the receiver path,
wherein the at least one reception parameter comprises a number of subcarriers at an operating bandwidth.
28 . An apparatus comprising:
at least one processor,
at least one memory including computer program code, and
at least one interface configured for communication with at least another apparatus,
the at least one processor, with the at least one memory and the computer program code, being configured to cause the apparatus to:
determine a delay value of a receiver path, via which a positioning-related signal is received, on the basis of at least one reception parameter,
measure a timing value for timing-based positioning calculation on the basis of the received positioning-related signal, and
correct the measured timing value on the basis of the determined delay value of the receiver path,
wherein the at least one reception parameter comprises a number of subcarriers at an operating bandwidth.