TDD Reconfiguration Timer for Adaptive Uplink-Downlink Signaling

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Solution Overview

Problem

Current wireless communication systems face challenges in dynamically and efficiently updating Time Division Duplex (TDD) configurations to adapt to varying uplink and downlink traffic loads, leading to suboptimal resource utilization and performance.

Innovation Solution

Implementing a reconfiguration timer and signaling mechanism to dynamically adjust the uplink-downlink configuration in TDD systems, allowing for flexible and adaptive reconfiguration with minimal signaling overhead, using techniques such as reconfiguration hysteresis and confirmation mechanisms to prevent unnecessary reconfigurations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If dynamic TDD reconfiguration is implemented to adapt to varying traffic loads, then resource utilization is improved, but signaling overhead increases

Engineering Contradiction:

Improveresource utilizationVSAvoidsignaling overhead

Core Design Contradiction:

ProductivityVSLoss of information

Solution Approach 1:

The network pre-configures multiple TDD uplink-downlink configurations and a reconfiguration timer before dynamic adaptation is needed. When traffic conditions change, the network can quickly switch between pre-configured patterns without extensive real-time signaling, reducing overhead while maintaining adaptability.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system dynamically selects between different TDD configurations based on current traffic conditions and uses a reconfiguration timer to adapt the uplink-downlink pattern over time. This dynamic approach allows the system to optimize resource utilization for varying traffic loads while the timer mechanism controls the frequency of reconfiguration signaling.

Inventive Principle:

Principle #15Dynamics

2Stability of the object's composition

If reconfiguration timer is used to prevent unnecessary reconfigurations, then system stability is improved, but adaptability to rapid traffic changes deteriorates

Engineering Contradiction:

Improvesystem stabilityVSAvoidadaptability to traffic changes

Core Design Contradiction:

Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The reconfiguration timer introduces a periodic evaluation mechanism where the system checks traffic conditions at regular intervals defined by the timer. This periodic action provides stability by preventing continuous reconfiguration while still allowing the system to adapt to sustained traffic changes that occur over the timer period.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system changes the timer value parameter based on traffic conditions and configuration patterns. By adjusting the timer duration, the system can balance between stability (longer timer) and adaptability (shorter timer), allowing flexible control over the trade-off without changing the fundamental reconfiguration mechanism.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If frequent reconfiguration signaling is performed, then resource utilization optimization is improved, but user equipment power consumption increases

Engineering Contradiction:

Improveresource utilization optimizationVSAvoiduser equipment power consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

Multiple TDD configurations are pre-configured in the UE before need. When reconfiguration is needed, the network can indicate a switch to a pre-configured pattern using minimal signaling, reducing the power consumption associated with extensive reconfiguration signaling while still achieving resource utilization optimization.

Inventive Principle:

Principle #10Preliminary action

4Adaptability or versatility

If TDD configuration is dynamically updated, then traffic load adaptability is improved, but HARQ timing issues arise

Engineering Contradiction:

Improvetraffic load adaptabilityVSAvoidHARQ timing

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

Multiple complete TDD configurations including HARQ timing parameters are pre-configured before dynamic selection. When the system switches configurations, the HARQ timing is already established in the pre-configured pattern, avoiding timing issues that would arise from dynamic calculation during reconfiguration.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system dynamically selects from pre-configured TDD patterns that each have defined HARQ timing relationships. This dynamic selection maintains traffic load adaptability while preserving reliable HARQ timing because each configured pattern has predetermined timing relationships that remain valid during operation.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS10009164B2Method and apparatus for utilizing a reconfiguration timer for updating TDD configuration

Publication Date: 2018.06.26 QUALCOMM INC

AI summary

In aspects, methods and apparatus for utilizing a reconfiguration timer for updating TDD configuration are provided. Certain aspects of the present disclosure propose methods and apparatus for improving system performance while using adaptive uplink-downlink reconfiguration in a time division duplex (TDD) system. For certain aspects, a reconfiguration timer may be utilized along with a signaling scheme, in order to enjoy benefits of the adaptive uplink-downlink reconfiguration with minimum signaling overhead.