Beam Tracking Link Switching in 60 GHz Millimeter-Wave Communications
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Solution Overview
Problem
Current beam tracking methods in 60 GHz millimeter-wave communications fail to rapidly switch between optimal and backup links, leading to interruptions and reduced throughput due to inadequate detection and switching times.
Innovation Solution
A method that involves a beam tracking initiator transmitting requests to a responder based on signal attenuation thresholds, using adaptive intermittent detection policies, and transmitting enhanced beam tracking training auxiliary sequences to switch between optimal and backup links efficiently, with information carried in MAC frames or physical layer frames to optimize communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam tracking is performed to maintain optimal link quality, then communication reliability is improved, but switching time increases causing throughput degradation
Solution Approach 1:
The patent pre-establishes backup links during the initial beam training phase and maintains them in a ready state. When link switching is needed, the system can immediately activate the pre-prepared backup link without performing full re-training, thus reducing switching time while maintaining reliability.
Solution Approach 2:
The system dynamically adjusts beam tracking frequency and intensity based on channel conditions. During stable periods, tracking is reduced to minimize switching overhead. During volatile conditions, tracking intensifies to maintain reliability. This dynamic adaptation resolves the contradiction by making the system responsive rather than static.
2Speed
If frequent beam tracking detection is performed to rapidly detect link changes, then switching speed is improved, but system complexity and overhead increase
Solution Approach 1:
The patent implements periodic beam tracking detection with adaptive intervals. Instead of continuous monitoring, the system performs detection at optimized intervals based on channel stability. This reduces computational overhead and system complexity while maintaining adequate detection speed to catch link changes promptly.
Solution Approach 2:
The system uses feedback from received signal strength indicators and link quality metrics to adaptively adjust detection frequency. When links are stable, detection intervals are extended. When degradation is detected, frequency increases. This feedback mechanism optimizes the balance between detection speed and system complexity.
3Reliability
If backup links are pre-established to enable rapid switching, then switching reliability is improved, but channel resource utilization decreases
Solution Approach 1:
The patent establishes backup links selectively for specific spatial directions and frequency resources rather than uniformly across all resources. This localized approach ensures reliable switching capability where needed while minimizing waste of channel resources in directions or frequencies where backup links are unnecessary.
Solution Approach 2:
The system dynamically adjusts backup link parameters such as power allocation, bandwidth, and spatial resources based on current channel conditions and traffic demands. This allows the system to maintain switching reliability while optimizing resource utilization by adapting backup link characteristics to actual needs rather than maintaining fixed, over-provisioned backup resources.
Data Source
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AI summary
The present invention relates to the field of communications technologies, and discloses a beam tracking method, apparatus, and system, so as to ensure rapid discovery and to switch from an optimal link to a backup link in time, or switch from a backup link to an optimal link, thereby effectively improving a throughput of a system link. The beam tracking method includes: transmitting, by a beam tracking initiator, a beam tracking request to a beam tracking responder; receiving, by the beam tracking initiator, an enhanced beam tracking training auxiliary sequence transmitted, according to the enhanced beam tracking request, by the beam tracking responder; and when it is determined according to a reception detection result of the enhanced beam tracking training auxiliary sequence that it is necessary to switch to a backup beam link, transmitting, by the beam tracking initiator, first link switching information to the beam tracking responder.