Electronic device and method for measuring a beam quality of a currently serving beam based on a prediction window when the detected beam quality is within a particular range

1. An electronic apparatus for wireless communications, comprising:

processing circuitry, configured to:

detect beam quality of a currently serving beam; and

start a prediction window when the detected beam quality is within a particular range, and

evaluate the beam quality of the currently serving beam within the prediction window.

2. The electronic apparatus according to claim 1 , wherein the beam quality is represented by one or more of the following: a block error rate of a physical downlink control channel, reference signal receiving power and reference signal receiving quality.

3. The electronic apparatus according to claim 1 , wherein the particular range comprises a range between two thresholds of multiple thresholds for the beam quality.

4. The electronic apparatus according to claim 1 , wherein the processing circuitry is configured to determine that the beam quality of the currently serving beam is poor, in a case that the number of events that the beam quality is detected within the particular range in the prediction window exceeds a predetermined value, and generate a beam switching request to be transmitted to a base station.

5. The electronic apparatus according to claim 4 , wherein the processing circuitry is further configured to detecting beam quality of other beams in a case of determining the beam quality of the currently serving beam being poor, to select one or more candidate beams as a switching target, and contain the information about the selected candidate beams in the beam switching request.

6. The electronic apparatus according to claim 4 , wherein the processing circuitry is further configured to start a beam switching window after the beam switching request is transmitted, and monitor a beam switching request response from the base station within the beam switching window.

7. The electronic apparatus according to claim 1 , wherein the processing circuitry is configured to perform a predetermined number of times of detection on the beam quality of the currently serving beam in the prediction window, record a detection value of each of the detections, and predict whether the currently serving beam would fail based on the recorded detection values.

8. The electronic apparatus according to claim 7 , wherein the processing circuitry is configured to determine a change tendency of the beam quality of the currently serving beam by comparing a ratio of a subsequent detection value to a previous detection value with a particular parameter, to perform the prediction, wherein the particular parameter is related to an upper limit and a lower limit of the particular range as well as the predetermined number of times.

9. The electronic apparatus according to claim 8 , wherein the processing circuitry is configured to count comparisons with a consistent change tendency, and predict that the currently serving beam would fail when the counting reaches the predetermined number of times, wherein the processing circuitry is further configured to adjust the predetermined number of times in a case of the change tendency being inconsistent, and predict that the currently serving beam would fail when the counting reaches the adjusted predetermined number of times.

10. The electronic apparatus according to claim 1 , wherein the processing circuitry is further configured to acquire one or more of the following via a radio resource control signaling: information about the particular range, and information about a size of the prediction window.

11. An electronic apparatus for wireless communications, comprising:

processing circuitry, configured to:

determine, based on information about a tail window contained in a beam failure recovery request response from a base station, a size of the tail window to be opened; and

open the tail window and detect beam quality of a new beam within the tail window.

12. The electronic apparatus according to claim 11 , wherein the processing circuitry is further configured to generate a tail window opening request to be transmitted to the base station simultaneously with a beam failure recovery request.

13. The electronic apparatus according to claim 11 , wherein

the processing circuitry is further configured to generate a beam failure recovery request when the number of times of detecting that beam quality of a currently serving beam is lower than a predetermined threshold exceeds a first number of times; and

the processing circuitry is further configured to generate a new beam failure recovery request when the number of times of detecting that the beam quality of the new beam is lower than a predetermined threshold exceeds a second number of times in the tail window,

wherein the first number of times is greater than the second number of times,

wherein,

the processing circuitry is further configured to open a beam failure recovery window with a first size after the beam failure recovery request is transmitted, to wait for the beam failure recovery request response; and

the processing circuitry is further configured to open a beam failure recovery window with a second size after the new beam failure recovery request is transmitted, to wait for the beam failure recovery request response,

wherein the first size is greater than the second size.