CoMP Cell Selection via Measurement Feedback

Solution Overview

Problem

Current methods for automatically generating cooperating sets in LTE networks may incorrectly include cells that do not support CoMP transmission/reception, leading to inefficiencies in cell edge throughput improvement.

Innovation Solution

The system communicates control information between radio base stations to configure cooperating sets, ensuring only cells with supported CoMP transmission/reception functions are included, and uses a neighbor cell list with attributes indicating multipoint cooperating communication capabilities.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Extent of automation

If automatic neighbor relation (ANR) function is used to generate neighbor cell list, then the neighbor cell list can be automatically updated, but cells that do not support CoMP transmission/reception may be incorrectly included in the cooperating set

Engineering Contradiction:

Improveautomatic generation of cooperating setVSAvoidaccuracy of CoMP cell selection

Core Design Contradiction:

Extent of automationVSReliability

Solution Approach 1:

The patent implements a feedback mechanism where measurement results from terminals are collected by the base station, and this information is used to update the neighbor cell list and identify cells suitable for CoMP transmission/reception. The base station uses the measurement reports to determine which neighbor cells should be added to the cooperating set, ensuring that only cells with appropriate signal quality and CoMP capability are selected.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system enables base stations to automatically identify and configure their own cooperating sets using measurement data from their served terminals. The base station autonomously processes measurement reports, updates the neighbor cell list, and determines CoMP cell configurations without requiring manual intervention or external control, making the CoMP cell identification self-service oriented.

Inventive Principle:

Principle #25Self-service

2Area of stationary object

If all neighbor cells are included in the cooperating set, then the coverage area for CoMP transmission/reception is maximized, but network resources are wasted on cells unable to perform CoMP

Engineering Contradiction:

Improvecoverage area of CoMP transmission/receptionVSAvoidnetwork resource waste

Core Design Contradiction:

Area of stationary objectVSLoss of energy

Solution Approach 1:

The patent applies local quality by differentiating between various types of neighbor cells and assigning different attributes to them. The neighbor cell list is updated with specific information indicating which cells are suitable for CoMP transmission/reception based on local measurement conditions and cell capabilities. This allows the system to optimize CoMP configuration for each specific cell rather than applying a uniform approach to all neighbor cells.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system changes parameters of the neighbor cell list by adding specific attributes and flags that indicate CoMP transmission/reception capability. The base station modifies the neighbor cell list to include only cells that meet the criteria for CoMP participation, thereby changing the composition and characteristics of the cooperating set to exclude unsuitable cells while maintaining coverage optimization.

Inventive Principle:

Principle #35Parameter changes

3Measurement precision

If manual configuration of cooperating sets is performed, then cell selection accuracy is improved, but operation expenditure and configuration complexity increase

Engineering Contradiction:

Improvecell selection accuracyVSAvoidconfiguration complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The system enables base stations to automatically identify and configure their own cooperating sets using measurement data from their served terminals. The base station autonomously processes measurement reports, updates the neighbor cell list, and determines CoMP cell configurations without requiring manual intervention or external control, making the CoMP cell identification self-service oriented.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent implements a feedback mechanism where measurement results from terminals are collected by the base station, and this information is used to update the neighbor cell list and identify cells suitable for CoMP transmission/reception. The base station uses the measurement reports to determine which neighbor cells should be added to the cooperating set, ensuring that only cells with appropriate signal quality and CoMP capability are selected.

Inventive Principle:

Principle #23Feedback

Data Source

PatentEP3573249B1Radio communicating system, radio communicating method, radio station, control station and program

Publication Date: 2023.11.08 NEC CORP

Figure 1
Figure 2
Figure 3

AI summary

A radio station communicates control information for multipoint cooperating communication, in which a plurality of radio stations takes part in data transmission/ reception of a terminal, with another radio station taking part in the multipoint cooperating communication and/or a control station that manages the radio station.