Dynamic Priority Bandwidth Allocation for Inter-Cell Interference Suppression

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Solution Overview

Problem

Existing methods for managing priority bandwidth in LTE systems are inflexible and prone to overlap between adjacent cells, leading to ineffective interference suppression and degraded communication path quality for edge terminals.

Innovation Solution

A dynamic approach is introduced where a base-point resource block is determined differently for each cell, and priority resource blocks are set in a predetermined sequence based on communication load to minimize overlap and optimize bandwidth allocation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a static priority bandwidth is set in each cell, then the configuration is simple, but the system lacks flexibility and priority bandwidth overlap occurs between adjacent cells

Engineering Contradiction:

Improveflexibility of priority bandwidth settingVSAvoidcomplexity of priority bandwidth management

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies dynamics by transitioning from a static priority bandwidth configuration to a dynamic one. The base station determines a base-point resource block differently for each cell and sets priority resource blocks in a predetermined sequence based on communication load, allowing the priority bandwidth to adapt dynamically to current network conditions and prevent overlap between adjacent cells.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of priority bandwidth allocation from a fixed static value to a dynamic value that varies based on communication load. By determining the base-point resource block differently for each cell and adjusting the allocation sequence according to load conditions, the system optimizes bandwidth usage while avoiding overlaps.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If priority bandwidth is allocated without considering communication load, then the allocation process is simple, but inter-cell interference suppression becomes ineffective

Engineering Contradiction:

Improveeffectiveness of inter-cell interference suppressionVSAvoidcomplexity of bandwidth allocation process

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements feedback by using communication load information to determine the base-point resource block and set priority resource blocks. The base station monitors communication load and adjusts the priority bandwidth allocation accordingly, creating a closed-loop system that adapts to changing network conditions to effectively suppress inter-cell interference.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent makes the priority bandwidth allocation dynamic by incorporating communication load as a determining factor. The base-point resource block is determined differently for each cell based on current load conditions, and the predetermined sequence for setting priority resource blocks is adjusted according to communication load, enabling effective interference suppression.

Inventive Principle:

Principle #15Dynamics

3Productivity

If the same wireless bandwidth is used among all cells, then resource utilization is maximized, but edge terminals experience degraded communication path quality due to strong inter-cell interference

Engineering Contradiction:

Improvethroughput for edge terminalsVSAvoidinter-cell interference level

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent applies local quality by differentiating priority bandwidth allocation based on the specific characteristics of each cell and its communication load. Instead of uniform allocation, the base station determines cell-specific base-point resource blocks and adjusts priority settings according to local conditions, providing optimized service for edge terminals in each cell.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent dynamically adjusts priority bandwidth allocation based on communication load to protect edge terminals from inter-cell interference. The base station determines the base-point resource block and sets priority resource blocks in a predetermined sequence based on current load conditions, adapting the allocation strategy to maintain high throughput for edge terminals.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS9094982B2Setting apparatus, communication system, base station, and program

Publication Date: 2015.07.28 NEC CORP

AI summary

This invention is directed to provision of a technique for dynamically performing a priority band establishment that can achieve the suppression of interference between adjacent cells. This invention is characterized in that: a base-point resource block, which serves as a base point in establishing a priority resource block to be used, on a priority basis, by a terminal for which the quality of a communication path does not meet a predetermined quality, is so decided as to be different from the base-point resource block of an adjacent communication area; and the priority resource block is established, based on a communication load, in a predetermined order with the decided base-point resource block used as the base point.