Adaptive Random Access Configuration for Beam Tracking Failures
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In beam-based wireless communication networks, the delay associated with Tx/Rx beam tracking during the random-access procedure is significant due to the limited number of available receive beams, leading to increased latency and reduced capacity, especially in scenarios where beam-tracking failures occur.
Innovation Solution
Adaptive Random-Access (RA) configuration switching from a default configuration to a denser configuration with more frequently occurring RA resources upon detection of beam-tracking failures, allowing quicker initiation of the random-access procedure and reducing the time before a receive-beam scanning cycle completes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If beamforming is used to concentrate transmitted power in desired directions, then signal strength and coverage are improved, but the number of available receive beams is limited, causing increased latency during random-access procedure
Solution Approach 1:
The patent applies dynamics by making the RA configuration adaptable and switchable. The system dynamically switches between a default RA configuration and an adaptive RA configuration with more frequently occurring RA resources when beam-tracking failure is detected. This dynamic adaptation allows the system to respond to changing beam-tracking conditions, reducing random-access latency while maintaining the benefits of beamforming for signal strength.
Solution Approach 2:
The patent changes the parameter of RA resource occurrence frequency by switching between two configurations. The default configuration has a certain RA resource frequency, while the adaptive configuration increases this frequency when beam-tracking fails. This parameter change directly addresses the latency issue by providing more frequent opportunities for random access without compromising the beamforming signal concentration.
2Loss of time
If the number of RA resources is increased to reduce access delay, then random-access latency is reduced, but network capacity and resource efficiency are reduced
Solution Approach 1:
The system dynamically adjusts the RA configuration based on beam-tracking status. When beam-tracking is successful, the default configuration with fewer RA resources is used, preserving network capacity. When beam-tracking fails, the system switches to the adaptive configuration with more frequent RA resources, reducing access delay only when necessary. This dynamic approach resolves the contradiction by making resource allocation conditional rather than static.
Solution Approach 2:
Instead of always using the adaptive configuration with more frequent RA resources, the system applies partial action by selectively switching to this configuration only when beam-tracking failure is detected. This avoids the excessive resource consumption that would occur if the dense configuration were always active, thereby maintaining network capacity while still reducing latency when needed.
3Stability of the object's composition
If beam-tracking process is used to maintain connection, then connection stability is improved, but when tracking fails, the time to re-establish connection increases
Solution Approach 1:
The patent prepares for beam-tracking failure in advance by having the adaptive RA configuration with more frequent RA resources pre-configured and ready. When beam-tracking failure is detected, the system can immediately switch to this pre-prepared configuration, reducing the time to re-establish connection. This preliminary preparation of the adaptive configuration resolves the contradiction by having recovery resources ready before failure occurs.
Solution Approach 2:
The system uses feedback from the beam-tracking process to trigger configuration switching. When beam-tracking failure is detected through monitoring feedback, the system responds by switching to the adaptive RA configuration. This feedback mechanism ensures that the system maintains connection stability through beam-tracking while能够快速 responding to failures and reducing re-establishment time through configuration adaptation.
Data Source
AI summary
Embodiments herein relate to a method performed by a wireless communication device 615, for performing random access. The wireless communication device 615 is configured with a first Random-Access (RA) configuration. The method comprises obtaining an indication of a failure of a beam-tracking process. The method further comprises adapting the RA configuration of the wireless communication device 615 based on the obtained indication, wherein the adapting comprises switching from the first RA configuration to a second RA configuration having more frequently occurring RA resources than the first RA configuration. The method further comprises transmitting, to a network node 611, 612, a RA message using a RA resource, which RA resource is based on the adapted RA configuration. Embodiments herein further relate to a method performed by a serving network node 611, as well as a wireless communication device 615 and a serving network node 611 for performing the methods.