Adaptive Beam Hopping Pattern for Multi-Cell Interference Reduction
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Solution Overview
Problem
Conventional multi-cell communication systems face limitations in efficiently using transmission/reception beams, leading to performance deterioration due to interference and excessive information sharing between Base Stations (BSs) and User Equipments (UEs), especially in high-frequency bandwidth environments, where the number of simultaneously serviceable BSs is limited by physical constraints and the frequency hopping scheme worsens the scattering effect.
Innovation Solution
The method involves adaptive beam hopping, where a UE requests multiple accesses for a predetermined time, determines available transmission beams based on a reference, and forms a beam hopping pattern to optimize beam usage, reducing interference and information sharing, while maintaining stable reception beams across all allocated frequency resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If frequency hopping scheme is used in multi-cell communication system, then interference is reduced, but scattering effect is worsened and performance deteriorates
Solution Approach 1:
The patent segments the frequency resources into multiple beam-specific frequency resources, where each transmission beam is assigned dedicated frequency resources. This segmentation prevents the scattering effect caused by frequency hopping while still reducing interference through beam-specific resource allocation. The UE and BS establish separate frequency resources for different beams, allowing simultaneous reception from multiple BSs without performance deterioration.
2Productivity
If multiple BSs simultaneously service a UE, then service quality is improved, but information sharing between BSs and UEs increases excessively
Solution Approach 1:
The patent extracts the beam identification information from the physical layer signaling and handles it at higher layers (RRC layer). The beam hopping pattern and frequency resource allocation are configured through RRC signaling rather than frequent physical layer updates. This extraction reduces the information sharing overhead while maintaining multi-BS service quality, as the beam management information is separated from the data transmission signaling.
3Adaptability or versatility
If transmission beams are frequently updated to adapt to UE movement, then communication quality is improved, but system complexity and information exchange increase
Solution Approach 1:
The patent implements periodic beam hopping patterns where the UE and BS alternate between different transmission beams in a predetermined periodic manner. Instead of continuous beam updates, the system uses periodic beam switching with configured patterns. This periodic action maintains adaptability to UE movement while reducing the complexity of continuous beam management and minimizing information exchange overhead.
4Ease of manufacture
If beam hopping is implemented without adaptive frequency resource allocation, then implementation is simplified, but interference reduction effectiveness decreases
Solution Approach 1:
The patent performs preliminary allocation of beam-specific frequency resources through RRC signaling before data transmission begins. The beam hopping pattern and frequency resource mapping are pre-configured, allowing the system to achieve effective interference reduction without complex real-time adjustments. This preliminary action maintains implementation simplicity while enhancing interference reduction effectiveness through adaptive frequency resource allocation.
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. Disclosed are a method and an apparatus for performing adaptive beam hopping in a multi-cell multi-user communication system. The method includes: making a request for allowing multiple accesses for beam hopping for a predetermined operation time to a plurality of accessible base stations (BSs); receiving a response to the request from two or more BSs among the plurality of BSs and determining, according to a predetermined reference, beams above the reference among transmission beams of the two or more BSs as available beams; determining a beam hopping pattern based on the determined available beams and transmitting the determined hopping pattern to the two or more BSs; and forming reception beams based on the determined beam hopping pattern to receive signals.