OAM Mode Selection for Wireless Spectrum Efficiency
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Solution Overview
Problem
The challenge in wireless communication systems is to efficiently utilize the limited frequency spectrum, particularly in high-demand scenarios like augmented reality, virtual reality, and the Internet of Things, where ultra-high speed, low latency, and large bandwidth are required, while managing intermodal interference in orbital angular momentum (OAM) communication systems.
Innovation Solution
The method involves determining and selecting appropriate OAM modes based on current channel information to form flexible mode combinations for transmitting shared channels, using network devices and terminal devices to configure OAM modes for physical downlink and uplink shared channels, thereby improving system reliability and frequency spectrum efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional frequency spectrum utilization methods are used, then the system is simple to implement, but the frequency spectrum efficiency is insufficient to meet ultra-high speed and large bandwidth requirements
Solution Approach 1:
The patent introduces orbital angular momentum (OAM) modes as an additional transmission dimension beyond traditional frequency and time domains. By utilizing OAM modes with different mode indices (e.g., l1, l2, l3), the system can multiplex multiple independent data streams over the same frequency resource, thereby dramatically improving frequency spectrum efficiency without simply increasing frequency bandwidth. This dimensional expansion allows the system to achieve ultra-high speed and large bandwidth requirements.
Solution Approach 2:
The patent implements dynamic OAM mode selection and combination adjustment based on current channel conditions. The network device determines appropriate OAM mode combinations (e.g., selecting from multiple candidate mode sets) according to real-time channel quality, ensuring optimal transmission performance under varying conditions. This dynamic adaptation resolves the complexity issue by providing automated, condition-based mode selection rather than requiring manual configuration of all possible mode combinations.
2Productivity
If multiple OAM modes are used to improve frequency spectrum efficiency, then the data transmission capacity increases, but the intermodal interference increases and system reliability decreases
Solution Approach 1:
The patent dynamically adjusts OAM mode selection based on channel parameters and quality indicators. When channel conditions are favorable, the system can utilize more OAM modes to maximize data transmission capacity. When channel conditions deteriorate or intermodal interference becomes significant, the system automatically reduces the number of active OAM modes or switches to more robust mode combinations, thereby maintaining system reliability while still providing high data rates when conditions permit.
Solution Approach 2:
The system implements feedback mechanisms where the network device monitors transmission quality and channel conditions, then adjusts OAM mode configurations accordingly. Based on measured performance metrics and channel state information, the network device determines optimal OAM mode combinations and communicates these configurations to the terminal device. This closed-loop feedback ensures that the system adapts to changing conditions and maintains reliability while maximizing data transmission capacity.
3Adaptability or versatility
If fixed OAM mode configuration is used, then the system complexity is reduced, but the adaptability to different channel conditions and service requirements is limited
Solution Approach 1:
The patent implements dynamic OAM mode selection where the network device determines appropriate OAM mode combinations based on real-time channel conditions and service requirements. Rather than using fixed configurations, the system continuously adapts its transmission mode to match current operational needs, whether for enhanced mobile broadband, ultra-reliable low-latency communication, or other service types. This dynamic approach provides high adaptability while the automated selection process manages the complexity burden.
Solution Approach 2:
The patent applies different OAM mode configurations tailored to specific channel conditions and service requirements. Instead of using a uniform mode configuration across all scenarios, the system selects locally optimized mode combinations for each transmission context. For example, certain mode combinations may be preferred for line-of-sight channels while others suit non-line-of-sight conditions, and different modes may be selected for different service types, thereby achieving local optimization that enhances overall system adaptability.
Data Source
AI summary
A method for transmitting shared channel based on orbital angular momentum includes: a network device determining, based on the current channel information, a target OAM mode for transmitting a shared channel, and transmitting a shared channel according to the target OAM mode.