Virtual Beam Identifier Modulo for Millimeter Wave Interference
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Solution Overview
Problem
Millimeter wave wireless communication systems face significant inter-beam interference at beam edges due to overlapping frequency resources, leading to degraded reception performance and inadequate data rates for terminals located at these edges.
Innovation Solution
A method and apparatus that configure beam identifiers and virtual beam identifiers to minimize inter-beam interference by performing a modulo operation on beam identifiers, allowing for efficient resource allocation and frequency hopping, thereby reducing resource collisions and improving reception performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beamforming is used to transmit precise beams to terminals in particular beam service areas, then transmission precision is improved, but inter-beam interference at beam edges cannot be perfectly blocked
Solution Approach 1:
The frequency resources are divided into multiple frequency assignments (FA0, FA1, FA2, FA3) and further segmented into resource blocks. By segmenting the frequency spectrum and assigning different segments to different beams, the patent prevents resource collision between beams while maintaining beamforming precision.
Solution Approach 2:
The patent introduces a new dimension for resource allocation by using frequency hopping across multiple frequency assignments. Instead of allocating resources only in the time-domain or frequency-domain, it creates a multi-dimensional resource allocation space using virtual beam identifiers and frequency hopping patterns, thereby avoiding inter-beam interference.
2Productivity
If frequency resources are overlapped among beams to increase resource utilization, then productivity is improved, but reception performance degrades due to inter-beam interference
Solution Approach 1:
The patent implements dynamic resource allocation through frequency hopping, where the resource blocks assigned to terminals change over time according to the virtual beam identifier. This dynamic approach allows frequency resources to be reused across different time slots while preventing simultaneous interference, thereby maintaining both high resource utilization and reliable reception.
Solution Approach 2:
Frequency hopping is implemented as a periodic action where resource blocks are systematically switched across different frequency assignments in a predetermined pattern. This periodic resource allocation ensures that beams that may interfere with each other use different frequency resources at different time intervals, maintaining resource utilization while preventing sustained interference.
3Productivity
If virtual beam identifiers are configured using modulo operation on beam identifiers, then resource allocation efficiency is improved, but system complexity increases
Solution Approach 1:
The patent transforms the beam identifier parameter through a modulo operation to generate the virtual beam identifier. This parameter transformation simplifies the resource allocation process by mapping multiple beam identifiers to a smaller set of virtual identifiers, improving allocation efficiency while the mathematical operation remains computationally simple.
Solution Approach 2:
The virtual beam identifier serves as a simplified copy or representation of the beam identifier for resource allocation purposes. Instead of using the full beam identifier directly for resource allocation, the patent creates a derived virtual identifier that retains the necessary information for resource assignment while reducing complexity in the allocation logic.
Data Source
AI summary
A base station configures beam identifiers for a plurality of transmission beams. The base station configures virtual beam identifiers for the plurality of transmission beams based on the maximum number of transmission beams from the plurality of transmission beams that may spatially overlap one another, and the beam identifiers. The base station allocates resources using the virtual beam identifiers.