Beam-Based Channel Detection for Unlicensed Band CCA
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Solution Overview
Problem
The integration of beam communication with unlicensed frequency bands in cellular communication systems poses challenges in ensuring communication quality and compatibility, as existing channel detection methods are not optimized for dynamic beam-based transmission.
Innovation Solution
A method involving clear channel assessment (CCA) is performed sequentially on multiple beams following a defined detection pattern to identify clear channels on unlicensed frequency bands, allowing for efficient utilization of beam and frequency spectrum resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If beam-based transmission is integrated with unlicensed frequency bands, then communication quality and spectrum utilization are improved, but channel detection complexity and interference management become more difficult
Solution Approach 1:
The channel detection process is segmented into multiple independent CCA operations, one for each beam. Instead of detecting all beams simultaneously or using a single detection method for all beams, the patent divides the detection into sequential CCA operations on individual beams according to a detection pattern. This segmentation simplifies the overall detection complexity by breaking it down into manageable independent units while maintaining comprehensive coverage of all beams.
Solution Approach 2:
The patent introduces dynamic beam switching based on CCA detection results. The detection pattern can be dynamically adjusted, and beams are selected and switched based on real-time channel availability detected through CCA. This dynamic approach allows the system to adapt to changing channel conditions, improving spectrum utilization by continuously selecting the best available beams while managing detection complexity through structured patterns.
2Reliability
If sequential CCA is performed on multiple beams, then channel availability is accurately detected, but detection time and transmission delay increase
Solution Approach 1:
The patent performs CCA detection on multiple beams in advance before actual data transmission. By sequentially detecting channel availability on N beams before selecting which beam to use for transmission, the system ensures that the chosen beam is already verified as available. This preliminary action prevents transmission delays caused by channel conflicts, as the detection is completed beforehand according to a predefined detection pattern.
Solution Approach 2:
The channel detection is performed periodically in structured detection patterns rather than continuously or randomly. The patent defines specific detection patterns that cycle through beams in an organized sequence, allowing the system to efficiently sample channel conditions on multiple beams at regular intervals. This periodic approach balances detection accuracy with time efficiency by avoiding unnecessary continuous detection while ensuring comprehensive beam coverage.
3Productivity
If unlicensed frequency bands are used to increase system capacity, then spectrum resources are better utilized, but interference from other systems and devices increases
Solution Approach 1:
The patent implements feedback-based beam selection through CCA detection. Before transmitting on any beam, the system actively detects channel availability and receives feedback about channel occupancy from other systems sharing the unlicensed band. Based on this feedback, the system selects only those beams that are detected as clear and available, avoiding beams that are currently occupied by other transmissions. This feedback mechanism enables the system to adapt to interference conditions and coexist harmoniously with other unlicensed band users.
Solution Approach 2:
The patent applies different detection and transmission strategies to different beams based on their local channel conditions. Instead of treating all beams uniformly, the system evaluates each beam's channel availability independently through CCA and makes localized decisions about which beams to use for transmission. This local quality approach allows the system to exploit spatial diversity, using beams with good channel conditions while avoiding beams affected by interference, thereby improving overall system capacity while managing interference effectively.
Data Source
AI summary
A channel detection method is provided. The method includes: according to a detection sequence of N beams defined by a detection pattern, sequentially performing clear channel assessment (CCA) of an unlicensed frequency band on the N beams, where N is a positive integer equal to or greater than 2.