Directional Cell DTX DRX Configuration for Wireless Power Management

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing power consumption, particularly in network nodes which are continuously powered, leading to significant energy costs and environmental impact.

Innovation Solution

Implementing a directional cell discontinuous transmission/reception (DTX/DRX) configuration that associates active and non-active periods with specific directions, allowing network nodes and user equipment to determine whether to transmit or receive communications based on the direction of the communication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If network nodes continuously transmit and receive communications, then communication reliability is improved, but energy consumption increases

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent segments the cell coverage area into multiple directional sectors, each with independent DTX/DRX configurations. This allows the network to apply discontinuous transmission/reception selectively to specific directions while maintaining continuous coverage in other directions, thus balancing reliability requirements with energy savings.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic DTX/DRX configuration where active and non-active periods are configured based on directional traffic patterns. The network can dynamically adjust which directions enter non-active states, enabling flexible adaptation to changing communication demands while preserving reliability where needed.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If directional DTX/DRX configuration is implemented, then power management flexibility is improved, but signaling overhead increases

Engineering Contradiction:

Improvepower management flexibilityVSAvoidsignaling overhead

Core Design Contradiction:

Adaptability or versatilityVSLoss of information

Solution Approach 1:

The patent uses existing downlink control information (DCI) formats to carry both scheduling information and DTX/DRX configuration indicators. By making the existing signaling mechanism multi-functional, it avoids creating separate dedicated signaling channels for DTX/DRX configuration, thus limiting the increase in signaling overhead.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent configures DTX/DRX parameters (active period, non-active period, direction indicators) that can be adjusted based on traffic patterns. These parameter changes enable flexible power management without requiring complex signaling structures, as the configurations are transmitted efficiently using existing control channels.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250176063A1Beam based cell discontinuous transmission and cell discontinuous reception

Publication Date: 2025.05.29 QUALCOMM INC

AI summary

This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media for a base station and a user equipment (UE) to operate in a directional cell discontinuous transmission (DTX) mode or a directional cell discontinuous reception (DRX) mode. The UE receives a configuration of an active period and a non-active period for one or both of a cell DRX configuration or a cell DTX configuration. The UE receives a downlink control information indicating that the configuration is activated. The configuration is associated with an indication of direction. The UE determines whether to receive or transmit a communication during the non-active period of the configuration based on the communication being associated with the indication of direction.