Interference Measurement via Null Resource Element Allocation
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Solution Overview
Problem
In wireless access systems, interference from neighboring cells affects channel quality information (CQI) accuracy and system throughput, as existing methods fail to effectively measure and mitigate interference, leading to suboptimal communication performance.
Innovation Solution
A method involving the allocation of null resource elements to specific symbol regions within resource blocks to measure interference from neighboring cells by transmitting a null signal, allowing for precise interference assessment without affecting data transmission, using multiple antennas and varying resource element allocations based on subframe indices and channel conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If all base stations use a single frequency region, then resource utilization is improved, but interference from neighboring cells increases
Solution Approach 1:
The patent segments the frequency resource by allocating different frequency regions to different base stations in a coordinated manner. Specifically, it divides the available frequency spectrum into multiple regions and assigns them to different cells in a pattern that reduces co-channel interference while maintaining overall resource utilization efficiency.
Solution Approach 2:
The patent applies local quality by allowing different frequency region allocations for different base stations based on their specific locations and interference environments. Each base station is configured with a frequency region suitable for its local conditions, enabling optimized performance while managing interference at the local level.
2Device complexity
If interference from neighboring cells is not considered in system configuration, then device complexity is reduced, but channel quality information measurement accuracy deteriorates
Solution Approach 1:
The patent implements preliminary action by pre-configuring frequency region allocations and interference measurement parameters during system setup. The base stations and mobile stations are pre-programmed with the frequency region assignment patterns and interference measurement configurations, so that interference management is automatically performed without requiring complex real-time decision-making.
3Device complexity
If interference measurement is not performed accurately, then device complexity is reduced, but system throughput deteriorates
Solution Approach 1:
The patent implements self-service by enabling mobile stations to autonomously measure interference on designated resource elements and report the measurements to the base station. The system automatically uses these measurements to adjust resource allocation and modulation schemes, eliminating the need for complex centralized interference management while maintaining high system throughput.
Data Source
AI summary
A method of measuring interference to perform efficient data communication is disclosed. A method of measuring interference of neighboring cells comprises allocating one or more first resource elements, to which pilot signals are allocated, to predetermined symbol regions included in a first resource block; allocating one or more second resource elements for measuring interference of the neighboring cells to a first symbol region of the predetermined symbol regions; and measuring interference of the neighboring cells using the one or more second resource elements.