Cell Cluster Management for Interference Mitigation in Heterogeneous Networks

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current LTE deployment lacks methods for forming and managing cell clusters, which are essential for mitigating interference between cells in heterogeneous networks, particularly in local area networks with fluctuating traffic conditions.

Innovation Solution

A method and system for establishing and maintaining cell clusters by detecting broadcast beacon signals, assuming roles as cluster heads, and coordinating transmission configurations within clusters, using enhanced message structures and procedures for cluster establishment and maintenance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If cell clusters are formed to mitigate interference between cells, then interference reduction is improved, but device complexity increases due to the need for cluster formation and management mechanisms

Engineering Contradiction:

Improveinterference between cellsVSAvoidcluster formation and management

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The system enables self-organization of cell clusters through autonomous detection of beacon signals and automatic assumption of cluster head roles by eNBs, eliminating the need for centralized cluster management and reducing operational complexity while achieving interference mitigation

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

Beacon signals serve as intermediary communication mechanisms that enable eNBs to detect and join clusters without direct complex coordination, simplifying the cluster formation process while effectively reducing interference between cells

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If TDD reconfiguration is implemented to adapt to traffic conditions, then resource efficiency is improved, but loss of time occurs due to reconfiguration overhead and coordination requirements

Engineering Contradiction:

Improveresource efficiencyVSAvoidreconfiguration overhead

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The system pre-establishes cell clusters and assigns cluster heads in advance, so that when traffic conditions change and TDD reconfiguration is needed, the coordination is already in place and can be executed quickly, reducing reconfiguration overhead time while maintaining resource efficiency

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system monitors traffic conditions and provides feedback to trigger adaptive TDD reconfiguration within established clusters, enabling efficient resource allocation while minimizing reconfiguration overhead through targeted rather than blanket reconfiguration

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS9648503B2System and method to establish and maintain cell clusters

Publication Date: 2017.05.09 AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE LTD

AI summary

A wireless communication method of establishing and maintaining a cell cluster comprising at least one cell configured to communicate with at least one UE (User Equipment), comprising detecting a broadcast beacon signal. The method further comprises, in response to an absence of the broadcast beacon signal, assuming the role of a cluster head of a cluster having a specific intra-cell identifier, and broadcasting a beacon signal. In response to detecting the broadcast beacon signal and an absence of an intra-cell identifier, continuing to transmit and receive using a prior duplex communication configuration. Further, in response to detecting the broadcast beacon signal and a presence of the intra-cell identifier, joining the cell identified by the detected intra-cell identifier, and setting its intra-cell identifier based on the detected intra-cell identifier.