Methods and nodes in a wireless communication network
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsIana Siomina, Ari Kangas
Life of this patent
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Abstract
A first network node and method in the first network node in a wireless communication network for enabling quality estimation of a measurement that is time based. The method comprises performing a timing measurement based on a signal received from a second network node. Also, a value of a channel characteristic for the signal received from the second network node is determined. Further, the determined value of the channel characteristic is associated with the timing measurement, such that quality estimation of the timing measurement is enabled. Further, a method in a positioning node, a positioning node, a method in a module and a module are presented.
Claims20
In a wireless communication network including a first network node and a second network node, a method for enabling quality estimation of a measurement that is time based, the method comprising:
- obtaining, by said first network node, a reference timing measure for a signal received from the second network node, wherein the reference timing measure is obtained as a function of the distance between the first network node and the second network node;
- performing, by said first network node, a timing measurement based on said signal received from the second network node;
- determining, by said first network node, a value of a channel characteristic for said signal received from the second network node;
- computing, by said first network node, a timing measurement error based on the difference between the reference timing measure and the timing measurement;
- converting the determined value of the channel characteristic into a quality metric value for the timing measurement by performing a quality function, wherein the quality function reflects the relationship between the channel characteristic and the timing measurement error, and wherein the quality function is defined as one of a polynomial function, an exponential function and a linear function;
- and
- associating, by said first network node, the determined value of the channel characteristic and/or the quality metric value with the timing measurement, such that quality estimation of the timing measurement is enabled.
A first network node for enabling quality estimation of a measurement that is time based, where the first network node and a second network node are comprised in a wireless communication network, the first network node comprising:
- a receiver to receive signals from a second network node;
- a processor configured to:
- obtain a reference timing measure for said signals received from the second network node, wherein the reference timing measure is obtained as a function of the distance between the first network node and the second network node;
- perform a timing measurement based on said signals received from the second network node;
- determine a value of a channel characteristic for said signals received from the second network node;
- compute a timing measurement error based on the difference between the reference timing measure and the timing measurement;
- convert the determined value of the channel characteristic into a quality metric value for the timing measurement by performing a quality function, wherein the quality function reflects the relationship between the channel characteristic and the timing measurement error, and wherein the quality function is defined as one of a polynomial function, an exponential function and a linear function;
- and
- associate the determined value of the channel characteristic with the timing measurement, such that quality estimation of the timing measurement is enabled.
A method implemented in a module in a first network node of a wireless communication network for obtaining a quality function by relating a value of a channel characteristic with a quality metric value, which values are associated with a timing measurement, the method comprising:
- obtaining a reference timing measure for signals received from second network nodes, wherein the reference timing measure is obtained as a function of the distance between the first network node and the second network nodes;
- obtaining timing measurements by the first network node for said signals received from the second network nodes,
- computing a timing measurement error and at least one value of a channel characteristic for each obtained timing measurement, based on the difference between the reference timing measure and the obtained timing measurements;
- associating the channel characteristic with the corresponding timing measurement;
- defining a quality function for a quality metric, wherein the quality function reflects the relationship between the channel characteristic and the timing measurement error;
- and wherein the quality function is defined as one of a polynomial function, an exponential function and a linear function.
A module in a first network node of a wireless communication network for obtaining a quality function by relating a value of a channel characteristic with a quality metric value, which values are associated with a timing measurement, the module comprising:
- a receiver to receive signals from second network nodes;
- a processor configured to:
- obtain a reference timing measure for said signals received from the second network nodes, wherein the reference timing measure is obtained as a function of the distance between the first network node and the second network nodes;
- obtain timing measurements by the first network node for said signals received from the second network nodes;
- compute a timing measurement error and at least one value of a channel characteristic for each obtained timing measurement, based on the difference between the reference timing measure and the obtained timing measurements;
- associate the channel characteristic with the corresponding timing measurement, and to define a quality function for a quality metric, wherein the quality function reflects the relationship between the channel characteristic and the timing measurement error;
- and wherein the quality function is defined as one of a polynomial function, an exponential function and a linear function.
Dependencies are inferred from the claim text.