Base Station Scheduler Crossed Timeslots Interference Elimination
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Solution Overview
Problem
In time-division duplexing (TDD) mode, crossed timeslots can cause strong interference between wireless communication devices sharing the same frequency band, as the same sub-frame is allocated to different terminal devices, leading to inefficient use of frequency bandwidth and interference.
Innovation Solution
A method is implemented to identify wireless communication devices near the edges of adjacent cells and select distinct starting points for allocating resource blocks, ensuring that each device uses a unique set of resource blocks to avoid crossed timeslots interference, by using hashing functions or algebraic formulations to determine starting points for resource block allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the same sub-frame is allocated to two different terminal devices using the same frequency band, then frequency bandwidth utilization is improved, but crossed timeslots interference occurs
Solution Approach 1:
The patent applies local quality by assigning different starting points for resource block allocation to different cells. Specifically, cells are divided into groups, and each group is assigned a distinct starting point offset. This creates localized differences in resource allocation patterns across the network, allowing adjacent cells to have different resource block mappings while maintaining overall system efficiency. The starting point difference ensures that edge devices in adjacent cells do not experience crossed timeslots interference.
Solution Approach 2:
The patent segments the network into multiple cell groups, where each group is assigned a unique starting point for resource block allocation. This segmentation approach divides the overall resource space into distinct segments for different cells, preventing interference between adjacent cells while allowing efficient resource utilization within each cell. The segmentation is implemented through grouping cells and assigning different starting point offsets to each group.
2Object-affected harmful factors
If resource blocks are allocated with different starting points in adjacent cells, then crossed timeslots interference is eliminated, but resource allocation complexity increases
Solution Approach 1:
The patent changes the parameter of starting point offset for resource block allocation to eliminate interference. By modifying this single parameter differently across cell groups, the system achieves interference elimination without complex allocation algorithms. The starting point is adjusted based on cell group identification, creating a simple yet effective differentiation mechanism that avoids crossed timeslots interference while maintaining manageable complexity.
Solution Approach 2:
The patent maintains homogeneity within cell groups by using the same starting point offset for all cells within a group. This uniform approach simplifies resource allocation management while still achieving interference elimination between different groups. The homogeneous treatment within groups reduces complexity compared to individualized allocation for each cell.
Data Source
AI summary
In an example embodiment, one or more scheduler of base stations may be configured to schedule resource blocks on a frequency band of two adjacent cells to eliminate crossed timeslots interference by selecting different starting points on the frequency band.