Beam Failure Detection in Wireless Networks
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Solution Overview
Problem
High-frequency wireless communication systems face challenges in beam management and reference signaling, particularly at millimeter wave frequencies above 52.6 GHz, due to complexities such as beamforming and multiple TRPs with simultaneous communication links, which require improved beam failure detection and recovery mechanisms.
Innovation Solution
A method for operating wireless devices in wireless communication networks that involves performing beam failure recovery operations based on beam failure detection within a defined time window, utilizing beam failure recovery opportunities configured dynamically, and transmitting beam failure indicating signaling to facilitate efficient beam selection and recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous beam failure monitoring is performed outside time windows, then beam failure detection reliability is improved, but power consumption and device complexity increase
Solution Approach 1:
The patent implements periodic beam failure monitoring only within specific time windows associated with beam failure recovery opportunities, rather than continuous monitoring. The wireless device determines whether to perform beam failure detection based on whether the current time falls within an active time window, thereby reducing power consumption while maintaining detection reliability during critical periods.
Solution Approach 2:
The network configures time windows in advance associated with beam failure recovery opportunities, allowing the wireless device to pre-know when monitoring should be activated. This preliminary configuration enables the device to enter low-power states outside these windows while being ready to detect beam failures immediately when windows become active.
2Measurement precision
If beam failure monitoring is performed continuously, then beam failure detection precision is improved, but resource usage efficiency deteriorates
Solution Approach 1:
The patent restricts beam failure monitoring to periodic time windows rather than continuous operation. During these windows, the wireless device performs precise beam failure detection by evaluating reference signal quality, while remaining inactive during non-critical periods. This approach maintains detection precision when needed while significantly improving resource usage efficiency by avoiding unnecessary monitoring activities.
3Reliability
If beam failure detection is performed outside configured time windows, then detection coverage is improved, but misdecision rate increases
Solution Approach 1:
The patent uses feedback from the network's configuration of time windows associated with beam failure recovery opportunities to guide when detection should occur. The wireless device receives configuration information indicating when recovery opportunities are expected, and uses this feedback to activate monitoring only during these validated time windows, thereby avoiding misdecisions that would occur from monitoring at inappropriate times while maintaining comprehensive coverage during critical periods.
Data Source
AI summary
There is disclosed a method of operating a wireless device in a wireless communication network, the method performing a beam failure recovery operation at a beam failure recovery opportunity based on a beam failure detection in a beam failure detection time window associated to the beam failure recovery opportunity. The disclosure also pertains to related devices and methods.