Sidelink Groupcast Scheduling via Base Station Coordination
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing sidelink communications, particularly in coordinating resources for groupcast transmissions between multiple user equipment (UEs), which affects throughput and reliability, especially in scenarios like vehicle-to-everything (V2X) and device-to-device (D2D) communications.
Innovation Solution
A method and apparatus for sidelink groupcast scheduling, where a UE transmits a scheduling request to a base station to receive a groupcast sidelink grant indicating time-frequency resources, allowing for efficient transmission of messages to multiple UEs by aligning resource pools and configuring transmission beams, with the base station determining optimal resources and UEs for groupcast communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If base station coordinates time-frequency resources for groupcast transmissions, then resource allocation efficiency is improved, but system complexity increases
Solution Approach 1:
The base station acts as an intermediary that coordinates time-frequency resources for groupcast transmissions between UEs. The base station receives scheduling requests from UEs, determines appropriate resources, and provides grants to multiple UEs, thereby improving resource allocation efficiency while managing system complexity through centralized coordination
Solution Approach 2:
The base station performs multiple functions including receiving scheduling requests from UEs, determining time-frequency resources for groupcast transmissions, and providing grants to multiple UEs. This multi-functional approach consolidates resource management tasks in a single entity, improving overall resource allocation efficiency across the system
2Reliability
If resource pools are aligned for transmitting and receiving UEs, then communication reliability is improved, but coordination overhead increases
Solution Approach 1:
The base station pre-coordinates time-frequency resources for both transmitting and receiving UEs before actual groupcast transmissions occur. By determining and allocating resources in advance through scheduling requests and grants, the system ensures resource pool alignment, improving communication reliability while managing coordination overhead through efficient preliminary planning
3Manufacturing precision
If beam configuration is optimized for groupcast transmissions, then data transmission quality is improved, but configuration complexity increases
Solution Approach 1:
The system configures specific transmission beams for specific groupcast transmissions based on the particular requirements of each communication scenario. The base station provides beam configuration information in grants tailored to individual transmitting UEs and their target receiving UEs, optimizing data transmission quality for each local communication context while managing overall configuration complexity
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A first user equipment (UE) may transmit, to a base station, a sidelink scheduling request for groupcast sidelink communications with a set of one or more UEs. The base station may determine one or more UEs of the set of UEs and time-frequency resources for groupcast sidelink communication between the first UE and the one or more UEs. The first UE may receive, from the base station, a groupcast sidelink grant that indicates time-frequency resources for groupcast sidelink communications between the first UE and one or more UEs. The first UE may transmit, via the time-frequency resources indicated by the groupcast sidelink grant, a groupcast sidelink message to the one or more UEs. The one or more UEs may also receive the sidelink grant, and may monitor the time-frequency resources for a groupcast sidelink communication from the first UE.