Sidelink Resource Scheduling with Single-DCI Unicast Control
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Solution Overview
Problem
Conventional wireless communication protocols require separate downlink control information (DCI) messages for scheduling multiple sidelink unicast resources, leading to increased overhead traffic and inefficiency in wireless networks, particularly in industrial Internet of Things (IIoT) scenarios where latency and reliability are critical.
Innovation Solution
A method where a user equipment (UE) receives a grant message indicating a set of sidelink resources, splits them into multiple subgroups, and transmits multiple unicast messages via these subgroups, using a single DCI message to reduce overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate DCI messages are used to schedule each sidelink unicast resource, then resource allocation accuracy is improved, but system overhead increases and network efficiency deteriorates
Solution Approach 1:
The patent combines multiple DCI messages into a single DCI message that can schedule multiple sidelink unicast resources simultaneously. This merging approach reduces the number of separate control messages transmitted over the air interface, thereby reducing system overhead and improving network efficiency while maintaining the ability to allocate resources accurately for each unicast connection
Solution Approach 2:
The patent enhances the DCI message structure to serve multiple functions: it can schedule multiple different sidelink unicast resources for a single UE, support both dynamic and semi-persistent scheduling, and accommodate different resource types (PSSCH, PSCCH) within a single control message framework. This multi-functionality reduces the need for separate specialized messages
2Measurement precision
If multiple DCI messages are transmitted to schedule multiple unicast messages, then scheduling control precision is improved, but latency increases due to additional message exchanges
Solution Approach 1:
By merging multiple scheduling decisions into a single DCI message transmitted at once, the patent eliminates the sequential transmission delay that would occur if multiple separate DCI messages were sent one after another. The UE receives all necessary scheduling information in a single downlink transmission, reducing the total time required for resource allocation
3Ease of operation
If separate DCI messages are used for each unicast, then individual resource management is improved, but network efficiency deteriorates due to increased message traffic
Solution Approach 1:
The patent merges the scheduling function for multiple unicast resources into a single DCI message while preserving individual resource management capabilities through the use of resource indication fields that can specify different time-frequency resources, modulation and coding schemes, and other parameters for each unicast connection independently
Solution Approach 2:
The DCI message structure is segmented to include distinct resource indication fields for each scheduled unicast resource. This segmentation allows the network to manage each unicast connection individually within the unified scheduling framework, specifying different parameters for different resources while transmitting everything in a single control message
Data Source
AI summary
This disclosure provides systems, methods, and apparatuses, including computer programs encoded on computer storage media, for wireless communication. In one aspect of the disclosure, a method of wireless communication performed by a user equipment (UE) includes receiving, from a base station, a grant message indicating a set of sidelink resources. The method further includes transmitting multiple unicast messages via multiple subgroups of the set of sidelink resources.