Sidelink Grant Selection for Simultaneous UE Transmissions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing LTE systems face challenges in efficiently allocating radio resources for multiple direct sidelink transmissions, leading to delayed data transmission and inefficient use of assigned radio resources.
Innovation Solution
The proposed solution involves a transmitting user equipment that allocates radio resources by acquiring multiple sidelink grants and selecting the most recently acquired grants to associate with different sidelink processes, allowing for simultaneous transmissions to multiple sidelink destination groups within a single sidelink control period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a transmitting user equipment is configured with a maximum number of sidelink processes for a single sidelink control period, then resource allocation control is maintained, but multiple simultaneous sidelink transmissions to different destination groups cannot be performed
Solution Approach 1:
The patent segments the sidelink transmission resources by introducing multiple sidelink processes (first sidelink process, second sidelink process, etc.), where each process can independently handle transmissions to different destination groups. This segmentation allows parallel transmissions while maintaining individual process control, resolving the contradiction between productivity improvement and complexity management.
Solution Approach 2:
The patent adds a process dimension to the sidelink transmission framework. Instead of limiting transmissions within a single process, multiple processes operate simultaneously in the same sidelink control period, effectively adding a temporal/process dimension to resource allocation. This enables multiple simultaneous transmissions while maintaining control through process-level management.
2Loss of time
If only a single sidelink transmission is performed per sidelink control period, then resource allocation simplicity is maintained, but data transmission delay increases
Solution Approach 1:
The patent applies preliminary action by having the transmitting user equipment acquire multiple sidelink grants in advance, before the sidelink control period begins. These grants are then associated with different sidelink processes proactively, enabling immediate simultaneous transmissions when the control period starts, thereby reducing transmission delay while managing complexity through pre-configuration.
Solution Approach 2:
The patent enables continuous useful action by allowing multiple sidelink processes to transmit data simultaneously throughout the sidelink control period. Instead of sequential transmissions that create idle gaps, multiple processes maintain continuous data flow to different destination groups, reducing overall transmission delay while managing complexity through structured process management.
3Adaptability or versatility
If multiple sidelink grants are acquired and associated with different sidelink processes, then simultaneous transmissions to multiple destination groups are enabled, but the complexity of grant management and process association increases
Solution Approach 1:
The patent segments grant management by dedicating specific sidelink grants to specific sidelink processes (first grant to first process, second grant to second process, etc.). This segmentation simplifies the association logic compared to dynamic allocation, as each process has its designated grant, thereby enabling versatility in transmitting to multiple destination groups while controlling management complexity through structured one-to-one mapping.
4Productivity
If radio resources are allocated for multiple sidelink transmissions within a single sidelink control period, then resource utilization efficiency improves, but the risk of resource conflicts and interference increases
Solution Approach 1:
The patent segments radio resources by allocating them to different sidelink processes, with each process having dedicated time-frequency resources through its associated sidelink grant. This segmentation prevents resource conflicts between processes, as each process operates on independently allocated resources, thereby improving overall resource utilization efficiency while maintaining transmission reliability through isolated resource management.
Solution Approach 2:
The patent introduces dynamic resource allocation where multiple sidelink processes can be activated or deactivated based on data availability and QoS requirements. This dynamic approach allows the system to adapt resource usage to actual needs, improving utilization efficiency while maintaining reliability by activating only the necessary number of processes and their associated resources at any given time.
Data Source
AI summary
The invention relates to the allocation of radio resources by a transmitting user equipment to perform a plurality of direct SL transmissions to one or more receiving user equipments. The allocation of radio resources within a SC period is restricted, for the SC period, by a maximum number of SL processes with which a transmitting user equipment is configured. A plurality of SL grants is acquired. Among the acquired SL grants a number of those SL grants is selected that have most recently been acquired before the start of the subsequent SC period. A plurality of SL processes is associated such that each of the plurality of SL process is associated with a different one of the selected number of SL grants. For each of the plurality of the SL processes, the radio resources are allocated. Each of the plurality of SL transmissions comprises at least one SCI transmission and at least one data transmission over the SL interface.