SBFD Switching Point Limit Mechanism

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Solution Overview

Problem

Wireless communications systems face challenges in reducing frequent switching between sub-band full duplex (SBFD) and non-SBFD symbols, leading to increased hardware complexity and interruptions during transitions, which affects transmission and reception efficiency.

Innovation Solution

Defining a maximum number of switching points between SBFD and non-SBFD symbols within a period, configured by a base station based on user equipment capability, to reduce interruptions and improve resource utilization.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If frequent switching between SBFD and non-SBFD symbols is allowed, then resource utilization flexibility is improved, but hardware complexity and transmission interruptions increase

Engineering Contradiction:
Improveresource utilization flexibilityVSAvoidhardware complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies parameter changes by modifying the switching behavior between SBFD and non-SBFD symbols. Specifically, it introduces a switching point limit parameter that constrains the number of transitions within a time period (e.g., slot or mini-slot). This parameter adjustment reduces hardware complexity by limiting the frequency of switching operations while still allowing sufficient flexibility for resource allocation adaptability.

Inventive Principle:
Principle #35Parameter changes

2Adaptability or versatility

If frequent switching between SBFD and non-SBFD symbols is allowed, then resource utilization flexibility is improved, but transmission interruptions increase

Engineering Contradiction:
Improveresource utilization flexibilityVSAvoidtransmission continuity
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The patent changes the switching parameter by imposing a limit on the number of switching points between SBFD and non-SBFD symbols within a specified time period. This parameter modification reduces transmission interruptions by minimizing the frequency of mode transitions, thereby improving transmission continuity and reliability while maintaining adequate resource utilization flexibility.

Inventive Principle:
Principle #35Parameter changes

3Device complexity

If switching points between SBFD and non-SBFD symbols are limited, then hardware complexity and interruptions are reduced, but resource utilization flexibility decreases

Engineering Contradiction:
Improvehardware complexityVSAvoidresource utilization flexibility
Core Design Contradiction:
Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent applies partial action by implementing a moderate limit on switching points rather than completely restricting switching. The limit is set to a specific number (e.g., 1 or 2 switching points per slot) that is sufficient to reduce hardware complexity and interruptions while still allowing enough flexibility for resource allocation. This partial constraint achieves a balanced compromise between the conflicting requirements.

Inventive Principle:
Principle #16Partial or excessive action

4Adaptability or versatility

If multiple switching points between SBFD and non-SBFD symbols are permitted, then transmission flexibility is improved, but latency increases

Engineering Contradiction:
Improvetransmission flexibilityVSAvoidlatency
Core Design Contradiction:
Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent changes the time-related parameter by limiting the number of switching points within a time period (slot or mini-slot). This parameter adjustment reduces latency by minimizing the number of transitions that cause interruptions, while still maintaining transmission flexibility through allowing a reasonable number of switching points (e.g., 1-2 per slot) for resource allocation adaptability.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentUS20240405962A1Switching points between sub-band full duplex (SBFD) and non-SBFD symbols
Publication Date: 2024.12.05 QUALCOMM INC
  • US20240405962A1 patent drawing
  • US20240405962A1 patent drawing
  • US20240405962A1 patent drawing

AI summary

Certain aspects of the present disclosure provide a method for wireless communications at a user equipment (UE). The UE may transmit an indication of a limit on a number of switching points (or transition points) between one or more first symbols configured for sub-band full duplex (SBFD) communications and one or more second symbols configured for non-SBFD communications, within a period of time. The UE may receive a configuration for the SBFD communications, which is in accordance with the indication.