Decoupled Sidelink Control and Data Collision Avoidance

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Solution Overview

Problem

Wireless communication systems face challenges in coordinating sidelink transmissions between user equipment (UEs) to avoid scheduling conflicts and efficiently utilize shared communication resources, leading to potential interference and reduced network efficiency.

Innovation Solution

The implementation of methods and systems that enable data scheduling collision avoidance and priority-based resource selection with decoupled sidelink control and data, allowing UEs to detect and mitigate scheduling conflicts by regenerating or selecting non-conflicting data resources, and using time interleave techniques to ensure resource allocation without overlap.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple UEs transmit sidelink transmissions simultaneously using shared channel resources, then communication capacity and resource utilization are improved, but scheduling conflicts and interference occur between transmissions

Engineering Contradiction:

Improvecommunication capacityVSAvoidscheduling conflict

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The control resource pool is segmented into multiple time interlaces, where each interlace corresponds to a specific set of data resources. This segmentation allows different UEs to be assigned to different interlaces, thereby avoiding scheduling conflicts while maintaining high resource utilization. The control channel and data channel resources are divided into distinct groups that can be independently scheduled.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements preliminary scheduling by assigning UEs to specific time interlaces and data resource sets before actual transmission occurs. The network device pre-configures the mapping between control resource interlaces and data resource sets, enabling UEs to select non-conflicting resources in advance, thus preventing scheduling conflicts before they occur.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If UEs perform real-time detection and mitigation of scheduling conflicts, then transmission reliability is improved, but processing time and complexity increase

Engineering Contradiction:

Improvetransmission reliabilityVSAvoidprocessing time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The network device pre-configures multiple time interlaces and establishes fixed mapping relationships between control resource interlaces and data resource sets. UEs are assigned to specific interlaces in advance, eliminating the need for complex real-time conflict detection and resolution, thus reducing processing time while maintaining reliability.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Each UE independently selects resources from its assigned time interlace and corresponding data resource set without needing to detect or coordinate with other UEs in real-time. This self-service approach simplifies the processing required while ensuring that resource selections are non-conflicting by design.

Inventive Principle:

Principle #25Self-service

3Reliability

If time interleave techniques are used to separate control transmissions, then scheduling conflict is reduced, but control resource utilization efficiency may decrease

Engineering Contradiction:

Improvescheduling conflict avoidanceVSAvoidcontrol resource utilization

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

Each time interlace is designed to serve multiple purposes: it provides conflict-free control channel transmission and simultaneously maps to a dedicated set of data resources. This multi-functionality ensures that control resources are fully utilized without causing scheduling conflicts, as each interlace independently manages both control and data resource allocation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent introduces a new dimension of resource organization by creating multiple time interlaces with distinct mappings to data resources. This dimensional expansion allows the system to achieve both conflict avoidance and high utilization by distributing control transmissions across multiple interlace dimensions rather than competing for the same resources.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS20230180184A1Data scheduling collision avoidance and priority based resource selection with decoupled sidelink control and data

Publication Date: 2023.06.08 QUALCOMM INC

AI summary

Methods, systems, and devices for wireless communications are described. An example method for wireless communication at a first wireless device, such as a user equipment (UE) may include receiving, at the first wireless device, a first sidelink control information (SCI) message from a second wireless device, wherein the first SCI message indicates a scheduling conflict between a first data transmission of the second wireless device and a second data transmission of the first wireless device. The method may also include transmitting a second SCI message from the first wireless device based at least in part on the scheduling conflict between the first data transmission and the second data transmission, wherein the second SCI message indicates a data resource allocation for the second data transmission that mitigates the scheduling conflict.