Beam Failure Recovery Resource Scheduling in Wireless Cells
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Solution Overview
Problem
Beam failure recovery procedures in wireless communications consume significant resources and lead to system inefficiencies due to the consumption of frequency, time, and energy resources.
Innovation Solution
Implementing beam failure recovery methods that utilize different uplink/downlink resources for indicating and acknowledging candidate beam selection status and communicating configuration parameters, thereby improving resource allocation efficiency, power consumption, and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional beam failure recovery procedures are used, then beam failure recovery can be achieved, but frequency, time, and energy resources are consumed significantly
Solution Approach 1:
The beam failure recovery procedure is divided into multiple phases: first phase uses first uplink resources for candidate beam indication, second phase uses second uplink resources for beam confirmation. This segmentation allows efficient resource utilization by separating different recovery functions into distinct resource allocations, reducing overall energy consumption while maintaining recovery reliability.
Solution Approach 2:
The wireless device indicates candidate beam selection status in advance using first uplink resources before final beam confirmation. This preliminary action allows the base station to prepare appropriate resources for beam confirmation, avoiding resource waste and reducing energy consumption by only allocating resources when needed.
2Reliability
If traditional beam failure recovery procedures are used, then beam failure recovery can be achieved, but system efficiency decreases due to resource consumption
Solution Approach 1:
The patent dynamically allocates different uplink resources for different beam failure recovery operations. The base station can flexibly assign first uplink resources for candidate beam indication and second uplink resources for beam confirmation based on actual recovery needs, optimizing system efficiency by avoiding fixed, resource-intensive procedures.
Solution Approach 2:
The patent introduces an intermediary mechanism where the wireless device first indicates candidate beam selection status using first uplink resources, then confirms the selected beam using second uplink resources. This intermediary step of candidate indication allows for more efficient resource allocation and reduces overall system resource consumption while maintaining recovery reliability.
3Reliability
If traditional beam failure recovery procedures are used, then beam failure recovery can be achieved, but latency increases
Solution Approach 1:
By segmenting the beam failure recovery into distinct phases with dedicated uplink resources, the patent reduces latency. The first phase for candidate beam indication and second phase for beam confirmation can proceed in parallel or with optimized sequencing, avoiding the sequential delays of traditional single-phase recovery procedures.
Solution Approach 2:
The wireless device performs preliminary candidate beam indication using first uplink resources before final beam confirmation. This preliminary action reduces the time needed for the complete recovery process by preparing beam selection information in advance, allowing the base station to quickly confirm the selected beam without waiting for full recovery procedures.
Data Source
AI summary
A wireless device triggers, based on not having uplink shared channel (UL-SCH) resources to transmit a beam failure recovery (BFR) medium access control (MAC) control element (CE), a scheduling request (SR). The wireless device receives a downlink control information (DCI) indicating an uplink grant. The uplink grant indicates one or more UL-SCH resources for the BFR MAC CE. The wireless device cancels the SR based on transmitting a MAC protocol data unit (PDU) comprising the BFR MAC CE.