CN-115918228-B - Mechanism for beam failure detection

Abstract

Embodiments of the present disclosure relate to beam failure detection. According to an embodiment of the present disclosure, after activating a serving cell from a deactivated state, a terminal device monitors beam failures on a serving beam of the serving cell. If a beam failure instance indication is received within a short time after activation, the terminal device determines that a beam failure was detected on the serving beam. In this way, beam failure recovery may be triggered faster to perform candidate beam searching.

Inventors

• S.H. Tetinan
• T. Costkela
• J-P. Koskenan
• WU CHUNLI

Assignees

• 上海诺基亚贝尔股份有限公司
• 诺基亚通信公司

Dates

Publication Date

20260512

Application Date

20210519

Claims (20)

1. 1. A first device for communication, comprising: at least one processor, and At least one memory including computer program code; wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the first device to: Performing an activation procedure on the deactivated serving cell; after activating the serving cell, monitoring a beam failure on a serving beam of the serving cell; in accordance with a determination that at least one beam failure instance indication is received within a predetermined period of time, determining that the beam failure was detected on the serving beam regardless of configuration for a second timer for beam failure detection and a second counter for beam failure detection, and And sending a beam failure report to the second device.
2. 2. The first device of claim 1, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the first device to determine that the beam failure is detected on the serving beam by: in accordance with a determination that the quality of the service beam is below a threshold quality and the at least one beam failure instance indication is received prior to the deactivation, it is determined that the beam failure was detected on the service beam.
3. 3. The first device of claim 1, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the first device to determine that the beam failure is detected on the serving beam by: In accordance with a determination that a timer for beam failure detection is running prior to the deactivating and the at least one beam failure instance indication is received, it is determined that the beam failure was detected on the serving beam.
4. 4. The first device of claim 1, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the first device to determine that the beam failure is detected on the serving beam by: In accordance with a determination that the counter for beam failure detection is greater than a predetermined number and the at least one beam failure instance indication is received, it is determined that the beam failure was detected on the serving beam.
5. 5. The first device of claim 1, wherein the predetermined period of time comprises one of: a first predetermined number of symbols is provided, A second predetermined number of milliseconds, or A third predetermined number of time slots, or Wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the first device to: the predetermined period of time is determined based on the interval for beam failure instance indication.
6. 6. The first device of claim 1, wherein the at least one memory and the computer program code are configured to, with the at least one processor, further cause the first device to: Receiving a configuration from the second device, the configuration indicating at least one of: A first timer for beam failure detection and said second timer for beam failure detection, said first timer being shorter than said second timer, or A first counter for beam failure detection and the second counter for beam failure detection, the maximum value of the first counter being smaller than the maximum value of the second counter.
7. 7. The first device of claim 6, wherein the at least one memory and the computer program code are configured to, with the at least one processor, further cause the first device to: in accordance with a determination that the at least one beam failure instance indication was received within the predetermined period of time, starting the first timer, and Wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the first device to determine that the beam failure is detected on the serving beam by: In accordance with a determination that another beam failure instance indication was received prior to expiration of the first timer, it is determined that the beam failure was detected on the serving beam.
8. 8. The first device of claim 6, wherein the at least one memory and the computer program code are configured to, with the at least one processor, further cause the first device to: in accordance with a determination that the at least one beam failure instance indication was received within the predetermined period of time, applying the first counter, and Wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the first device to determine that the beam failure is detected on the serving beam by: in accordance with a determination that the first counter reaches the maximum value of the first counter, it is determined that the beam failure was detected on the serving beam.
9. 9. The first device of claim 6, wherein the at least one memory and the computer program code are configured to, with the at least one processor, further cause the first device to: in accordance with a determination that no beam failure instance indication is received within the predetermined period of time, at least one of the second timer or the second counter is applied.
10. 10. The first device of claim 1, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the first device to send the beam failure report by: In accordance with a determination that a candidate beam is different from the serving beam, transmitting the beam failure report indicating the candidate beam, or In accordance with a determination that the quality of the candidate beam is better than the quality of the serving beam, the beam failure report is sent indicating the candidate beam.
11. 11. The first device of claim 1, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the first device to send the beam failure report by: The beam failure report is sent without indicating the candidate beam in accordance with a determination that the candidate beam is the same as the serving beam or that the quality of the candidate beam is poor compared to the quality of the serving beam.
12. 12. The first device of any of claims 1-11, wherein the serving cell is a secondary cell or a group of secondary cells.
13. 13. The first device of any of claims 1-11, wherein the first device comprises a terminal device and the second device comprises a network device.
14. 14. A second device for communication, comprising: at least one processor, and At least one memory including computer program code; wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the second device to: In accordance with a determination that at least one beam failure instance indication for a serving beam of a serving cell is received at a first device within a predetermined period of time after activating the serving cell, a beam failure report is received from the first device regardless of configuration for a second timer for beam failure detection and a second counter for beam failure detection.
15. 15. The second device of claim 14, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the second device to receive the beam failure report by: In accordance with a determination that the quality of the serving beam is below a threshold quality prior to deactivation of the serving cell and the at least one beam failure instance indication is received, the beam failure report is received from the first device.
16. 16. The second device of claim 14, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the second device to receive the beam failure report by: In accordance with a determination that a timer for beam failure detection is running prior to deactivation of the serving cell and the at least one beam failure instance indication is received, a beam failure report is received from a first device.
17. 17. The second device of claim 14, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the second device to receive the beam failure report by: in accordance with a determination that the counter for beam failure detection is greater than a predetermined number and the at least one beam failure instance indication is received, the beam failure report is received from the first device.
18. 18. The second device of claim 14, wherein the predetermined period of time comprises one of: a first predetermined number of symbols is provided, A second predetermined number of milliseconds is counted, A third predetermined number of time slots, or Interval for beam failure instance indication.
19. 19. The second device of claim 14, wherein the at least one memory and the computer program code are configured to, with the at least one processor, further cause the second device to: transmitting a configuration to the first device, the configuration indicating at least one of: A first timer for beam failure detection and said second timer for beam failure detection, said first timer being shorter than said second timer, or A first counter for beam failure detection and the second counter for beam failure detection, the maximum value of the first counter being smaller than the maximum value of the second counter.
20. 20. The second device of claim 19, wherein the at least one memory and the computer program code are configured to, with the at least one processor, further cause the second device to: in accordance with a determination that the at least one beam failure instance indication was received within the predetermined period of time and another beam failure instance indication was received prior to expiration of the first timer, the beam failure report is received from the first device.

Description

Mechanism for beam failure detection Technical Field Embodiments of the present disclosure relate generally to the field of telecommunications and, more particularly, relate to methods, apparatuses, devices, and computer-readable storage media for beam failure detection. Background With the development of communication technology, several technologies have been proposed to increase the system capacity. For example, a technique called "beamforming" has been proposed. Beamforming allows for specific processing of a transmitted or received signal to be directed. If a beam failure occurs when the surrounding environment changes, the terminal device may report the beam failure and request recovery of the beam. Disclosure of Invention In general, example embodiments of the present disclosure provide a solution for beam failure detection. In a first aspect, a first device is provided. The first device includes at least one processor and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the first device to perform an activation process on a deactivated serving cell, monitor a beam failure on a serving beam of the serving cell after activating the serving cell, determine that the beam failure was detected on the serving beam in accordance with a determination that at least one beam failure instance indication was received within a predetermined period of time, and send a beam failure report to the second device. In a second aspect, a second device is provided. The second device includes at least one processor and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the second device to, in accordance with a determination that at least one beam failure instance indication for a serving beam of a serving cell is received at the first device within a predetermined period of time after activating the serving cell, receive a beam failure report from the first device. In a third aspect, a method is provided. The method includes performing an activation procedure on a deactivated serving cell on a first device, monitoring a serving beam of the serving cell for beam failure after activating the serving cell, determining that a beam failure was detected on the serving beam in accordance with a determination that at least one beam failure instance indication was received within a predetermined period of time, and transmitting a beam failure report to a second device. In a fourth aspect, a method is provided. The method includes, at the second device, in accordance with a determination that at least one beam failure instance indication for a serving beam of the serving cell is received at the first device within a predetermined period of time after activating the serving cell, receiving a beam failure report from the first device. In a fifth aspect, an apparatus is provided. The apparatus includes means for performing an activation procedure for a deactivated serving cell, means for monitoring a serving beam of the serving cell for beam failure after activating the serving cell, means for determining that a beam failure was detected on the serving beam based on determining that at least one beam failure instance indication was received within a predetermined period of time, and means for transmitting a beam failure report to a second device. In a sixth aspect, an apparatus is provided. The apparatus includes means for receiving, at a second device, a beam failure report from a first device in response to determining that at least one beam failure instance indication for a serving beam of a serving cell is received at the first device within a predetermined period of time after activating the serving cell. In a seventh aspect, a computer readable medium is provided. The computer readable medium comprising program instructions for causing a device to perform at least the method according to any of the third or fourth aspects above. It should be understood that the summary is not intended to identify key or essential features of the embodiments of the disclosure, nor is it intended to be used to limit the scope of the disclosure. Other features of the present disclosure will become apparent from the following description. Drawings Some example embodiments will now be described with reference to the accompanying drawings, in which: FIG. 1 illustrates an example communication environment in which example embodiments of the present disclosure may be implemented; Fig. 2 illustrates signaling flows for conveying beam information according to some example embodiments of the present disclosure; fig. 3 illustrates a flowchart of a method implemented at a first apparatus according to some example embodiments of the present disclosure; fig. 4 illustrates a flowchart of a method implemented at a second apparatus according to