Virtual Base Station Beamforming Training Coordination

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Solution Overview

Problem

In millimeter-wave communication networks, the increased number of base station apparatuses leads to interference and prolongs beamforming training time due to the lack of exclusive control among multiple base stations, making it difficult for terminals to receive responses and for base stations to report the best sectors, thereby limiting the communication range and efficiency.

Innovation Solution

A virtual base station apparatus is formed by connecting multiple base station apparatuses via a dedicated line, allowing them to autonomously select and report the best base station for response, reducing training time and increasing communication range by coordinating beamforming training among the base stations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If multiple base station apparatuses perform beamforming training simultaneously, then the cell area coverage is increased, but the beamforming training time is prolonged due to lack of exclusive control

Engineering Contradiction:

Improvecell area coverageVSAvoidbeamforming training time

Core Design Contradiction:

Area of stationary objectVSLoss of time

Solution Approach 1:

The patent segments the beamforming training process by introducing a trigger mechanism where only the base station that receives the trigger frame performs training. This divides the simultaneous training attempt into a sequential process where base stations take turns based on trigger reception, reducing interference and training time while maintaining expanded coverage.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements preliminary action by having base stations exchange capability information and receive trigger frames before actually performing beamforming training. This preliminary coordination phase allows the system to determine which base station should conduct training, preventing simultaneous attempts and reducing overall training time while preserving the ability to cover multiple areas.

Inventive Principle:

Principle #10Preliminary action

2Length of stationary object

If multiple base station apparatuses perform beamforming training, then the communication range is extended, but interference increases making it difficult for terminals to receive responses

Engineering Contradiction:

Improvecommunication rangeVSAvoidinterference

Core Design Contradiction:

Length of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the trigger reception condition from the general training process and uses it as a filtering mechanism. Only base stations that successfully receive the trigger frame are allowed to perform training, effectively taking out the interfering base stations that did not receive the trigger and eliminating their harmful interference while maintaining extended communication range.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The trigger frame acts as an intermediary that coordinates between multiple base stations and the terminal. It mediates the training process by selectively enabling only those base stations that receive it, thus controlling interference levels while preserving the ability to extend communication range through coordinated multi-base station operation.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If base station apparatuses autonomously select best base station for response, then training efficiency is improved, but coordination complexity increases

Engineering Contradiction:

Improvetraining efficiencyVSAvoidcoordination complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent creates equipotentiality by establishing a common reference point (the trigger frame reception) for all base stations. Each base station independently evaluates its position relative to this common reference, allowing autonomous selection of the best base station for response without requiring complex inter-base-station negotiation, thus improving efficiency while limiting coordination complexity to a simple threshold-based decision.

Inventive Principle:

Principle #12Equipotentiality

Data Source

PatentUS9942059B2Wireless communication system, wireless control method, and virtual base station apparatus

Publication Date: 2018.04.10 PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA

AI summary

A virtual base station apparatus includes: a first base station apparatus and a second base station apparatus. The first base station apparatus includes a first receiver that receives a plurality of first training frames, a first transmitter that transmits a plurality of second training frames to a terminal apparatus, and a calculator that calculates a first reception quality of each of the plurality of first training frames. The terminal apparatus includes a second transmitter that transmits the plurality of first training frames to the plurality of base station apparatuses, and a second receiver that receives the plurality of second training frames. The first receiver receives a second reception quality of each of the plurality of first training frames from the second base station apparatus. The first reception quality is transmitted to the second base station apparatus when the first reception quality is higher than the second reception quality.