Sidelink Grant Management for Multi-Destination 5G UE
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Solution Overview
Problem
Current sidelink communication methods in 5G systems face inefficiencies in managing multiple transmissions, leading to resource waste and delayed transmissions due to the inability to handle multiple grants effectively, especially for user equipment (UE) with multiple source IDs and destinations.
Innovation Solution
A method and apparatus for processing grants in sidelink communication that allow multiple transmissions to different or single destinations using multiple grants, enabling UE to request and receive grants efficiently, and perform transmissions within specified sidelink control periods, thereby preventing resource waste and unnecessary transmission attempts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple grants are allocated to UE for sidelink communication, then transmission capability to multiple destinations is improved, but resource overhead and system complexity increase
Solution Approach 1:
The patent segments the sidelink communication process by introducing distinct grant types (first grant for initial transmission, second grant for retransmission) and separate indicator fields (first indicator for multiple transmission support, second indicator for grant type). This segmentation allows the system to handle multiple destinations efficiently while maintaining manageable complexity through structured, modular grant management.
2Productivity
If multiple transmissions are performed in SC period, then communication efficiency is improved, but resource waste occurs without proper grant management
Solution Approach 1:
The patent implements feedback mechanisms where the UE reports its multiple transmission support capability to the base station, and the base station responds by allocating appropriate grants. The first indicator sent by UE provides feedback on capability, enabling the base station to optimize grant allocation and prevent resource waste by matching grant allocation to actual UE capabilities and transmission needs.
Solution Approach 2:
The patent changes key parameters including introducing multiple grant types with different validities, adding indicator fields to signal transmission capabilities, and modifying the grant allocation strategy based on UE feedback. These parameter changes enable efficient multiple transmissions while preventing resource waste through conditional grant validity and capability-based allocation.
3Reliability
If grants are allocated for retransmission, then transmission reliability is improved, but additional resource overhead is incurred
Solution Approach 1:
The patent introduces dynamic grant validity through the second indicator, which specifies whether a grant is valid for one SC period or multiple SC periods. This dynamic approach allows the system to allocate retransmission resources flexibly based on actual needs, improving transmission reliability while minimizing resource overhead by avoiding permanent allocation of resources that may not be needed.
Data Source
AI summary
The present disclosure relates to fifth generation (5G) or pre-5G communication systems provided to support a higher data rate than that given by long term evolution (LTE) or other post-fourth generation (4G) communication systems. A method for performing a sidelink communication by a terminal is provided. The method includes sending, to a base station, a request for multiple grants for the sidelink communication and a first indicator indicating whether the terminal supports multiple transmissions of the sidelink communication to different destinations in a sidelink control (SC) period, receiving the multiple grants from the base station, and performing the multiple transmissions to the different destinations in the SC period.