Multi-TRP TDD Scheduling with Dedicated Flexible Symbols

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Solution Overview

Problem

Existing wireless communication systems face challenges in managing uplink-downlink collisions due to independent scheduling by multiple transmission and reception points (TRPs) in multiple TRP mode, leading to inefficiencies and potential failures.

Innovation Solution

Implementing a semi-static time division duplexing (TDD) pattern with dedicated flexible symbols for communication with independent TRPs, allowing for independent scheduling and reducing collisions by designating specific symbols for uplink or downlink communications with each TRP.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If independent scheduling is implemented by multiple TRPs in multiple TRP mode, then communication flexibility and capacity are improved, but uplink-downlink collisions occur leading to system failures

Engineering Contradiction:

Improvecommunication flexibilityVSAvoidsystem reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent segments the flexible symbols into TRP-specific dedicated flexible symbols and shared flexible symbols. Each TRP independently schedules only its dedicated symbols, preventing scheduling conflicts while maintaining independent scheduling capability. This segmentation resolves the contradiction by allowing flexibility through independent scheduling in dedicated symbols while ensuring reliability by eliminating collisions through clear resource partitioning.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by differentiating between dedicated flexible symbols (specific to one TRP) and shared flexible symbols (available to multiple TRPs). This local differentiation allows each TRP to have independent scheduling authority over its dedicated symbols while coordinating on shared symbols, thus achieving both communication flexibility and collision-free operation.

Inventive Principle:

Principle #3Local quality

2Productivity

If flexible symbols are shared among multiple TRPs for independent scheduling, then resource utilization is improved, but scheduling conflicts and collisions increase

Engineering Contradiction:

Improveresource utilizationVSAvoidscheduling coordination complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments flexible symbols into dedicated and shared categories, allowing TRPs to independently schedule dedicated symbols without coordination while maintaining the ability to share shared symbols. This segmentation improves resource utilization by maximizing independent scheduling opportunities while reducing coordination complexity by clearly defining which symbols require collaboration.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent performs preliminary action by pre-configuring which flexible symbols are dedicated to which TRP and which are shared. This advance configuration establishes clear scheduling boundaries before communication occurs, enabling efficient independent scheduling in dedicated symbols while simplifying coordination in shared symbols, thus improving resource utilization without excessive complexity.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If all flexible symbols are dedicated to a single TRP, then scheduling conflicts are eliminated, but resource utilization and communication efficiency decrease

Engineering Contradiction:

Improvescheduling conflict eliminationVSAvoidresource utilization

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent segments flexible symbols into dedicated flexible symbols (assigned to one TRP) and shared flexible symbols (available to multiple TRPs). This segmentation eliminates scheduling conflicts in dedicated symbols while improving resource utilization by allowing multiple TRPs to efficiently use shared symbols through coordinated scheduling, thus resolving the contradiction between conflict elimination and resource utilization.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies universality by making shared flexible symbols available to multiple TRPs for scheduling. These shared symbols serve multiple functions and multiple TRPs, improving overall resource utilization while the dedicated symbols maintain conflict-free operation. This multi-functionality approach resolves the contradiction by allowing flexible symbols to serve both exclusive and shared purposes.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12568484B2Apparatus for wireless communications, and a method thereof

Publication Date: 2026.03.03 QUALCOMM INC

AI summary

Methods, systems, and devices for wireless communications are described. Techniques described herein provide for independent scheduling by a first transmission and reception point (TRP) and a second TRP for a user equipment (UE) operable in a multiple TRP (mTRP) mode. A semi-static time division duplexing (TDD) pattern may indicate a set of downlink symbols, a set of uplink symbols and a set of flexible symbols. A portion of the flexible symbols may be dedicated for communications with the first TRP, and the second TRP may not use the portion of the flexible symbols dedicated for communications with the first TRP. The first UE may operate in the mTRP mode in the semi-static downlink symbols or uplink symbols and operate in a single TRP mode in the portion of the flexible symbols dedicated for communications with the first TRP.