5G Transmission Power Control for Spherical Coverage

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Solution Overview

Problem

Current 4G LTE systems face limitations in achieving the required low latency and high reliability needed for emerging applications like autonomous driving and augmented reality, with latency times exceeding 1 ms, and existing regulatory requirements for transmission power in 5G NR do not account for spherical coverage, including actual device displays and external covers, which affects the accuracy of Equivalent Isotropic Radiated Power (EIRP) calculations.

Innovation Solution

A method to determine transmission power that meets a minimum EIRP value for spherical coverage by using a 50th percentile of the distribution of measured radiated power, incorporating an offset to ensure compliance across all directions, thereby ensuring reliable communication in 5G NR systems, particularly for bands 257, 258, 260, and 261.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If transmission power is determined based on peak EIRP value only, then device complexity is reduced, but measurement precision and reliability of spherical coverage are insufficient

Engineering Contradiction:

Improvetransmission power determination complexityVSAvoidEIRP measurement precision for spherical coverage

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent changes the parameter basis from peak EIRP value to 50th percentile EIRP value of the distribution. This parameter change ensures that the transmission power determination accounts for spherical coverage characteristics while maintaining a manageable complexity level through statistical sampling rather than exhaustive measurement.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces the traditional peak-value-based transmission power control mechanism with a statistical distribution-based mechanism. By using the 50th percentile of measured EIRP values, the system achieves more reliable spherical coverage without requiring complex real-time optimization algorithms.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Use of energy by moving object

If transmission power meets peak EIRP requirement only, then power consumption is reduced, but communication reliability for spherical coverage is insufficient

Engineering Contradiction:

Improvedevice power consumptionVSAvoidcommunication reliability for spherical coverage

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent applies partial action by determining transmission power based on the 50th percentile of EIRP distribution rather than the peak value. This approach provides sufficient power for spherical coverage in most cases (50% coverage probability) while avoiding the excessive power consumption that would result from always using peak EIRP requirements.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS10624038B2Method for determining transmission power and a mobile communication device performing the method

Publication Date: 2020.04.14 LG ELECTRONICS INC

AI summary

There is provided a method for determining transmission power. The method is performed by a wireless communication device and comprises: determining transmission power; and transmitting uplink signal based on the transmission power, wherein the transmission power meets a requirement for a minimum EIRP value for the spherical coverage, and wherein the requirement for the minimum EIRP value for the spherical coverage is predetermined based on a 50th percentile of a distribution of measured power.