Slot Format Indication for IAB Case 7 Timing

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Solution Overview

Problem

The deployment of new timing schemes, such as Case 7 timing, in wireless communication systems introduces new timing scenarios that require innovative solutions to support simultaneous uplink and downlink communications in integrated access and backhaul (IAB) architectures.

Innovation Solution

The method involves receiving signals indicating whether symbols at the beginning or end of sequences of symbols are reserved or to be reserved, and performing uplink transmissions or downlink receptions accordingly, thereby facilitating slot format indication in wireless communication systems under Case 7 timing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If Case 7 timing scheme is deployed to enable simultaneous reception and transmission in IAB nodes, then communication efficiency is improved, but system complexity increases due to multiple new timing scenarios

Engineering Contradiction:
Improvecommunication efficiencyVSAvoidsystem complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent applies parameter changes by dynamically adjusting timing parameters (K1, K2, K3 values) based on different timing scenarios. The network can configure different K1, K2, K3 parameter sets for different IAB node capabilities and traffic patterns, allowing the system to optimize communication efficiency while managing complexity through parameterization rather than hard-coded complex logic

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent implements dynamics by enabling flexible and dynamic timing adjustments in IAB nodes. The timing behavior can be dynamically changed based on network conditions, node capabilities, and traffic requirements. The system supports dynamic switching between different timing scenarios (Scenario 1, 2, 3) and allows dynamic configuration of slot format indicators, making the system adaptable rather than static

Inventive Principle:
Principle #15Dynamics

2Adaptability or versatility

If new timing scenarios are supported to enable simultaneous uplink and downlink communications, then network adaptability is improved, but implementation difficulty increases

Engineering Contradiction:
Improvenetwork adaptabilityVSAvoidimplementation difficulty
Core Design Contradiction:
Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent applies universality by designing a multi-functional timing framework that can handle multiple timing scenarios (Scenario 1 for sequential operations, Scenario 2 for simultaneous reception, Scenario 3 for simultaneous transmission) using a unified set of K1, K2, K3 parameters. The same basic mechanism and signaling procedures are used across all scenarios, reducing implementation complexity while maintaining high adaptability to different network configurations and IAB node capabilities

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent segments the timing control into distinct configurable parameters (K1 for scheduling offset, K2 for HARQ timing, K3 for slot format indication timing) that can be independently adjusted for each timing scenario. This segmentation allows the complex timing behavior to be broken down into manageable, independently controllable components, making implementation easier while maintaining versatility

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS20250048365A1Method and apparatus for slot format indication
Publication Date: 2025.02.06 LENOVO (BEIJING) LTD
  • US20250048365A1 patent drawing
  • US20250048365A1 patent drawing
  • US20250048365A1 patent drawing

AI summary

Embodiment of the present application is directed to a method and apparatus for slot format indication. According to an embodiment of the present application, the method includes receiving at least one signal indicating one of: whether at least one symbol at a beginning of a sequence of consecutive symbols transmitted or received over a communication link is reserved or is to be reserved, and whether at least one symbol at an end of the sequence of consecutive symbols transmitted or received over the communication link is reserved or is to be reserved. The at least one uplink transmission is performed based on the received signal in response to the communication link being associated with an uplink transmission. The at least one downlink reception is performed based on the received signal in response to the communication link being associated with downlink reception.