Wireless Backhaul Frequency Reuse Patterns for Interference Mitigation
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Solution Overview
Problem
Wireless backhaul networks experience interference issues due to the densification of hubs and remote nodes, leading to reduced data throughput, non-uniform signal coverage, and increased outage areas, which are not effectively addressed by traditional frequency reuse patterns.
Innovation Solution
Implementing a multi-cell deployment model with frequency reuse patterns that include orthogonal frequency faces and non-broadside common frequency views, allowing for the alternating utilization of multiple wireless communication frequencies across cells, and adapting sector configurations to mitigate interference during network expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless backhaul networks densify hubs and remote nodes to support traffic growth, then network capacity and coverage are improved, but interference between communications increases
Solution Approach 1:
The patent applies local quality by assigning different frequency reuse patterns to different cells based on their specific deployment geometry and traffic characteristics. Each cell is configured with frequency assignments tailored to its local environment, allowing denser deployment while managing interference locally rather than using a uniform frequency pattern across the entire network.
Solution Approach 2:
The patent changes frequency assignment parameters by implementing alternating frequency reuse patterns where adjacent cells use different frequencies. This parameter change in frequency allocation allows more cells to be deployed in the same geographic area while maintaining acceptable interference levels, thereby increasing network capacity.
2Device complexity
If traditional frequency reuse patterns are used in dense wireless backhaul networks, then implementation simplicity is maintained, but data throughput rates are reduced
Solution Approach 1:
The patent segments the frequency spectrum by dividing it into multiple frequency groups that are assigned to different cells in an alternating pattern. This segmentation allows efficient utilization of available frequencies while maintaining manageable assignment complexity through systematic patterns rather than random allocations.
Solution Approach 2:
The patent implements periodic frequency reuse patterns where frequency assignments repeat in a predictable sequence across adjacent cells. This periodic structure simplifies planning and deployment while maximizing throughput by ensuring that interfering cells use different frequencies in a systematic, repeating pattern.
3Ease of manufacture
If network densification is implemented without proper frequency planning, then rapid deployment is achieved, but signal coverage uniformity deteriorates
Solution Approach 1:
The patent applies preliminary action by establishing frequency reuse patterns and frequency assignments during the network planning and deployment phase. This advance frequency planning ensures that even as networks are rapidly densified, signal coverage uniformity is maintained from the outset rather than requiring later corrections.
Data Source
AI summary
Systems and methods for frequency reuse in a multi-cell deployment model of a wireless backhaul network are shown. According to embodiments, a wireless backhaul network includes a plurality of cells, each of which includes one or more hubs supporting wireless backhaul communication utilizing a cell deployment geometry and wireless communication frequency assignments adapted to facilitate heterogeneous cell configurations within the wireless backhaul network. In particular, embodiments provide frequency planning for initial deployment, build out, and expansion of a plurality of cells providing wireless backhaul communication so as to implement a predetermined wireless frequency reuse pattern providing alternating utilization of a plurality of wireless communication frequencies by the cells of the backhaul network.