Method and apparatus for determining UE mobility status
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsJiandong Zhuang, Xixian Chen
Life of this patent
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Abstract
A radio user equipment (UE) mobility status is determined in a communications node. UE mobility status measurements associated with the UE communicating over a radio channel are performed. The UE mobility status corresponds to a degree of variation of the radio channel over time. Channel characteristics of the radio channel at a first time and at a second later time are determined. Based on the determined channel characteristics, a channel characteristic error metric is determined and compared to a predetermined threshold. The UE mobility status is determined based on one or more iterations of the threshold comparison.
Claims45
A method for determining a radio user equipment (UE) mobility status in a radio communications node, comprising the steps of:
- a-performing UE mobility status measurements associated with the UE communicating over a radio channel, where the UE mobility status corresponds to a degree of variation of the radio channel over at least one of time and frequency;
- b-determining a channel characteristic of the radio channel at a first time represented as a first complex domain vector;
- c-determining a channel characteristic of the radio channel at a second later time represented as a second complex domain vector;
- d-determining a channel characteristic error metric in the complex domain based on a distance between the first complex domain vector and the second complex domain vector;
- e-comparing the channel characteristic error metric to a predetermined threshold;
- and
- f-determining the UE mobility status based on the threshold comparison,
- wherein a value of the channel characteristic error metric larger than the predetermined threshold represents a higher mobility and a value of the channel characteristic error metric smaller than the predetermined threshold represents a lower mobility.
A radio network node apparatus for determining a radio user equipment (UE) mobility status in a radio communications node, comprising data:
- radio circuitry for communicating with the UE, and
- processing circuitry, coupled to the radio circuitry, configured to execute the following computer-implemented operations:
- a-determine UE mobility status measurements associated with the UE communicating with the radio network node over a radio channel via the radio circuitry, where the UE mobility status corresponds to a degree of variation of the radio channel over at least one of time and frequency;
- b-determine a channel characteristic of the radio channel at a first time represented as a first complex domain vector;
- c-determine a channel characteristic of the radio channel at a second later time represented as a second complex domain vector;
- d-determine a channel characteristic error metric in the complex domain based on a distance between the first complex domain vector and the second complex domain vector;
- e-compare the channel characteristic error metric to a predetermined threshold;
- and
- f-determine the UE mobility status based on the threshold comparison,
- wherein a value of the channel characteristic error metric larger than the predetermined threshold represents a higher mobility and a value of the channel characteristic error metric smaller than the predetermined threshold represents a lower mobility.
Dependencies are inferred from the claim text.