ASN-Controller Load Balancing via Spare Capacity Reports

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Solution Overview

Problem

Current wireless communication network architectures, such as WiMAX's profile A and C, face issues with overloading and inefficient load balancing, leading to potential service disruptions and increased backhaul requirements.

Innovation Solution

A method and system that involves an ASN-controller reading reports from Base Stations (BSs) on spare capacity, generating directions for load balancing by offloading MSs from overloaded BSs to neighboring BSs with available capacity, without requiring additional backhauls, using a centralized decision-making process within the ASN-controller.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If profile A (centralized) architecture is used, then RRM and HOM functions are enabled, but the ASN-controller becomes heavily overloaded

Engineering Contradiction:

ImproveRRM and HOM function enablementVSAvoidASN-controller overload

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the centralized RRM functions by introducing distributed RRC entities in each BS while maintaining centralized coordination through the RRR in ASN-controller. This divides the overload burden from the ASN-controller to individual BSs, each handling local RRM decisions independently yet coordinated centrally.

Inventive Principle:

Principle #1Segmentation

2Device complexity

If profile C (distributed) architecture is used, then ASN-controller overload is reduced, but a BS may be simultaneously transferred load by two neighboring BSs resulting in over-loading

Engineering Contradiction:

ImproveASN-controller overload reductionVSAvoidBS overload during handover

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent implements feedback mechanisms where BSs report their load status and spare capacity to the RRR in ASN-controller. The RRR uses this feedback information to make informed handover decisions, preventing target BSs from being overloaded by coordinating load transfer based on real-time network status reports from all BSs.

Inventive Principle:

Principle #23Feedback

3Ease of operation

If profile C (distributed) architecture is used, then local RRM decisions are enabled, but extra backhauls are required for information transfer between BSs

Engineering Contradiction:

ImproveLocal RRM decision makingVSAvoidExtra backhaul requirements

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent merges the backhaul communication requirements by having all BSs report to and receive instructions from the centralized RRR in the ASN-controller. This single point of coordination eliminates the need for separate direct backhaul links between all pairs of BSs, reducing overall backhaul complexity while maintaining distributed RRM capabilities.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS8849275B2Method and apparatus for load balancing in a wireless communication network

Publication Date: 2014.09.30 WICHORUS LLC

AI summary

A method, system, and apparatus for communication in wireless communication network having an Access Service Network-controller (ASN-controller) communicating with plurality of Base Stations (BSs). The method includes reading one or more reports of plurality of reports received from the plurality of BSs. The plurality of reports comprise spare capacity information of one or more BSs of the plurality of BSs. The method further includes generating one or more directions based on the one or more reports to perform load balancing.