DCI Format 3_0 Sidelink Grant Activation
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Solution Overview
Problem
Existing wireless communication technologies face challenges in efficiently configuring sidelink grants for resources enabling reliable and power-efficient sidelink communication in 5G networks, particularly for vehicle-to-everything (V2X) applications.
Innovation Solution
The proposed solution involves mechanisms for activating and deactivating sidelink grants, allocating resources from the network for sidelink communication, and optimizing retransmission operations using hybrid automatic repeat request (HARQ) process identifiers. Additionally, the solution aligns the size of DCI format configurations with existing formats to ensure seamless sidelink communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic grant mechanisms are used for sidelink resource allocation, then resource flexibility is improved, but control signaling overhead increases
Solution Approach 1:
The patent segments resource allocation into two parts: semi-persistent grants configured via higher-layer signaling (RRC) for long-term resource reservation, and dynamic grants via DCI for short-term adjustments. This segmentation reduces continuous control overhead while maintaining flexibility when needed.
Solution Approach 2:
The patent implements periodic semi-persistent scheduling where resources are allocated periodically through pre-configured grants. This periodic action reduces control signaling overhead compared to continuous dynamic grants, while still providing regular resource availability for sidelink communication.
2Use of energy by moving object
If configured grants are used for sidelink communication, then power efficiency is improved, but resource allocation flexibility deteriorates
Solution Approach 1:
The patent introduces dynamic grant mechanisms that allow the network to activate, deactivate, or modify semi-persistent grants through DCI signaling. This adds dynamics to the otherwise static configured grants, enabling flexibility to adapt to changing channel conditions and traffic patterns while maintaining power efficiency during stable periods.
Solution Approach 2:
The patent allows modification of grant parameters (such as resource allocation, time patterns, frequency resources) through network signaling. This enables parameter changes to semi-persistent grants without reconfiguring the entire grant, providing flexibility while maintaining the power-efficient configured grant structure.
3Reliability
If multiple HARQ processes are implemented for sidelink, then reliability is improved, but system complexity increases
Solution Approach 1:
The patent applies universal HARQ process management mechanisms from uplink communications to sidelink communications. The same HARQ entity, process identification, and acknowledgment mechanisms are reused across different link types, reducing system complexity while achieving improved reliability through multiple parallel HARQ processes.
Data Source
AI summary
A service device (e.g., a user equipment (UE), a new radio NR (gNB), or other network component) as a service provider/consumer can process or generate sidelink communications based on a downlink control information (DCI) for one or more sidelink configured grants that enables resource allocation for the sidelink communication. The device can determine whether to activate, release/deactivate, or request a retransmission for the one or more sidelink configured grants based on one or more fields of a DCI format 3_0 configuration of the DCI.