US20250260470
2025-08-14
Electricity
H04B7/06964
The patent application describes methods and systems for beam failure recovery and conditional handover in wireless networks, specifically for highly directional systems. These methods aim to minimize outages and interruptions by using network deployment information about cells and beams. The wireless transmit/receive unit (WTRU) receives a beam recovery configuration, which includes candidate recovery beams, network deployment details, and criteria for selecting these beams. When a beam failure is detected, the WTRU selects a recovery beam based on this configuration.
The system leverages precise network deployment data to assist devices in recovering from beam failures. A WTRU can gather information from local sensors to determine its geographic position and orientation. This data helps in selecting the most suitable candidate beam for recovery. Post beam failure detection, the WTRU uses updated geographic data to choose a recovery beam and performs a Random Access Channel (RACH) transmission as part of the recovery process.
Conditional handover procedures are designed to handle mobility events that affect link quality. The WTRU provides assistance data to the network, which uses this information along with its deployment knowledge to configure a set of candidate cells and beams for handover. When mobility impacts connection quality, the WTRU calculates its position and selects the highest priority cell-beam pair for potential handover, executing it if conditions are met.
A WTRU is equipped with a processor and transceiver to manage beam failure recovery configurations, which include candidate beams and associated information like reference signals and coverage areas. The device detects beam failure conditions and selects candidate beams based on local sensor data and predefined priorities. This selection process involves evaluating various criteria such as synchronization sequences, geographical coordinates, and other sensor-derived data.
The described method involves receiving a beam recovery configuration that outlines candidate beams and their respective attributes. The WTRU detects failures, sends configuration information for selected beams, and chooses candidates based on priority and reference signal data. The method ensures that selections meet quality criteria and adhere to RACH parameters, utilizing comprehensive sensor data like GPS, gyroscopes, and accelerometers to inform decisions.