Single Frequency Network Resource Restriction for Interference Coordination

Solution Overview

Problem

Existing single frequency network technologies face challenges in maximizing data throughput across cells and sectors due to interference, especially in irregularly planned networks with real geography constraints, where resource restrictions need to be dynamically adjusted to optimize spectrum usage.

Innovation Solution

A method for automatic resource restriction distribution, where mobile terminals and base stations perform power measurements and calculate signal-to-interference ratios to identify and adjust resource usage, maximizing data throughput by selectively applying power restrictions across subsets in a single frequency network, optimizing interference coordination.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If resource restrictions are applied to subsets in single frequency network cells, then interference coordination is improved, but data throughput is reduced

Engineering Contradiction:

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The patent applies different power restriction levels to different subsets of frequency resources in different cells. Specifically, subsets that cause significant interference to neighboring cells have their power restricted, while other subsets maintain full power transmission. This local differentiation of resource quality allows interference coordination without uniformly reducing data throughput across the entire network.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system dynamically adjusts the power parameter for specific frequency subsets based on interference measurements. By changing the power parameter selectively for subsets causing interference rather than applying uniform power reduction, the system achieves interference coordination while preserving data throughput on non-interfering subsets.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If automatic resource restriction distribution is implemented, then network adaptability is improved, but device complexity increases

Engineering Contradiction:

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements self-service through automatic resource restriction distribution where the network autonomously measures interference, calculates optimal power restrictions, and configures subsets without manual intervention. The system serves itself by continuously monitoring and adjusting resource allocations based on current network conditions, reducing the need for complex manual configuration while maintaining high adaptability.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system employs feedback mechanisms where interference measurements from mobile terminals are continuously reported to the network, which then adjusts resource restrictions accordingly. This closed-loop feedback enables automatic adaptation to changing network conditions while keeping device complexity manageable through standardized measurement and reporting procedures.

Inventive Principle:

Principle #23Feedback

3Measurement precision

If signal to interference ratio calculations are performed for all terminals, then interference coordination accuracy is improved, but processing time increases

Engineering Contradiction:

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent applies partial action by performing detailed signal to interference ratio calculations only for terminals and subsets that are relevant to interference coordination, rather than calculating for all terminals uniformly. This selective approach maintains accuracy for critical cases while reducing overall processing time by excluding unnecessary calculations.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS8155661B2Method for automatic resource restriction distribution, a base station, a mobile terminal, a resource distribution device and a mobile network therefor

Publication Date: 2012.04.10

AI summary

The invention concerns a method for automatic resource restriction distribution for coordination of the interference between cells (C1, C2, . . . ) or sectors (S1, S2, . . . ) of a single frequency network with the frequency band being subdivided into at least two subsets (F1, F2 . . . FR), whereby mobile terminals (T1) in the single frequency network perform power measurements of pilot symbols, based on said power measurements, the signal to interference ratio and the data throughput in the cells (C1, C2, . . . ) in case of no interference coordination and in case of interference coordination is calculated, and at least one dedicated subset of said at least two subsets (F1, F2 . . . FR) is chosen for usage with restricted power in such a way that the overall data throughput in the cells (C1, C2, . . . ) is maximized, a base station, a mobile terminal, a resource distribution device and a mobile network therefor.