Dynamic Resource Partitioning for Wireless Network Interference

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Solution Overview

Problem

In heterogeneous wireless networks, interference between macrocells and small cells leads to inefficient resource utilization and reduced throughput due to static resource allocation, where small cells experience strong interference from macrocells, limiting spectral efficiency and coverage area.

Innovation Solution

Implementing a control system that dynamically partitions radio communications resources into primary and secondary partitions, with distinct transmission rules for each, allowing secondary users to access resources under more restrictive rules to minimize interference and enable resource reuse, thereby enhancing network performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If resources are statically and exclusively allocated to distinct sets of base stations, then interference between base stations is avoided, but resource utilization efficiency deteriorates and throughput is reduced

Engineering Contradiction:

Improveinterference avoidanceVSAvoidresource utilization efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent transforms static resource allocation into dynamic allocation by introducing time-varying partition configurations. Resource partitions are no longer fixed but change over time based on network conditions, allowing base stations to access different resource sets at different times. This dynamic approach enables better resource utilization while maintaining interference avoidance through controlled partitioning.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent implements preliminary resource partitioning where resource partitions are pre-configured and assigned to different base station sets before actual communication occurs. This preliminary allocation ensures that interference avoidance is built into the system structure, while the partitioning scheme is designed to optimize resource utilization efficiency from the outset.

Inventive Principle:

Principle #10Preliminary action

2Quantity of substance

If macrocells and small cells share the same resources, then system capacity increases, but interference from macrocells to small cells increases significantly

Engineering Contradiction:

Improvesystem capacityVSAvoidinterference to small cells

Core Design Contradiction:

Quantity of substanceVSObject-affected harmful factors

Solution Approach 1:

The patent segments the resource spectrum into multiple partitions, with different partitions allocated to macrocells and small cells at different times. This segmentation allows both cell types to access the same overall resource pool (increasing system capacity) while preventing simultaneous interference through temporal separation of resource access.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements periodic resource partitioning where resource allocations to macrocells and small cells alternate in a periodic manner. This periodic action ensures that when one cell type uses certain resources, the other cell type is prevented from using them simultaneously, thereby maintaining system capacity while avoiding interference.

Inventive Principle:

Principle #19Periodic action

3Reliability

If resources are partitioned into disjoint subsets and exclusively allocated, then interference is avoided, but service rates are reduced due to loss of resource reuse

Engineering Contradiction:

Improveinterference avoidanceVSAvoidservice rates

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent makes resource partitions universal by allowing the same physical resources to serve multiple base station sets at different times through different partition configurations. This multi-functionality enables resource reuse across different cell sets, increasing service rates while maintaining interference avoidance through temporal separation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent implements a resource recovery mechanism where resources allocated to one base station set are temporarily discarded (made unavailable) and then recovered for allocation to other base station sets at different times. This cyclical discarding and recovering enables resource reuse while preventing simultaneous interference between different cell sets.

Inventive Principle:

Principle #34Discarding and recovering

Data Source

PatentUS8638661B2Partitioning resources with soft reuse in a wireless network

Publication Date: 2014.01.28 WSOU INVESTMENTS LLC

AI summary

Systems and methods are disclosed for reusing resources of a wireless network. Radio communications resources of the wireless network are divided into partitions. A system described herein allows access to resources in the first partition by a first set of users for primary communications on the first partition, and allows access to resources in the first partition by a second set of users for secondary communications on the first partition. The control system also allows access to resources in the second partition by the second set of users for primary communications on the second partition, and allows access to resources in the second partition by the first set of users for secondary communications on the second partition.