Sidelink Resource Allocation Using Pre-configured Parameter Sets
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Solution Overview
Problem
Conventional LTE V2X transmission schemes face limitations such as scheduling-related latency and resource conflicts in sidelink communications, particularly due to reliance on dynamic scheduling and lack of dynamic signaling in grant-free transmission modes.
Innovation Solution
A method and apparatus for sidelink communication where user equipment (UE) receives configuration information with multiple sets of parameters for sidelink data transmission, using a configuration index to transmit sidelink control information and data, allowing for autonomous resource allocation without dynamic signaling, enabling efficient sidelink data transmission between UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic scheduling is used for sidelink transmission, then resource allocation flexibility is improved, but scheduling latency and system complexity increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple sets of transmission parameters (time resources, frequency resources, DMRS, MCS, RV sequences) before actual transmission occurs. These pre-configured parameter sets are stored in the UE and can be directly used for transmission without waiting for dynamic scheduling decisions, thereby reducing scheduling latency while maintaining resource allocation flexibility.
Solution Approach 2:
The patent implements dynamics by allowing the UE to dynamically select from multiple pre-configured parameter sets based on current transmission needs and channel conditions. The UE can switch between different parameter sets (e.g., different time resources, frequency resources, modulation schemes) without requiring dynamic scheduling signaling, thus maintaining adaptability while reducing latency.
2Extent of automation
If autonomous resource selection is used for sidelink transmission, then transmission autonomy is improved, but resource collision and conflict increase
Solution Approach 1:
The patent applies segmentation by dividing the resource pool into multiple distinct parameter sets, each with specific time resources, frequency resources, and transmission parameters. By segmenting resources in this structured way and assigning different parameter sets to different UEs or transmission occasions, the system reduces the likelihood of collisions while maintaining autonomous selection capability.
Solution Approach 2:
The patent implements feedback mechanisms where UEs can sense the transmission environment and provide feedback information about channel conditions, interference levels, and resource usage. This feedback enables UEs to make more informed autonomous selections from the pre-configured parameter sets, avoiding resource collisions by selecting parameter sets that are less likely to conflict with other transmissions.
3Adaptability or versatility
If multiple configuration parameter sets are used, then transmission parameter flexibility is improved, but configuration complexity increases
Solution Approach 1:
The patent applies preliminary action by having the network side pre-configure and provide multiple sets of transmission parameters to the UE before actual transmission occurs. This preliminary configuration eliminates the need for the UE to complexly calculate or determine transmission parameters in real-time, reducing UE complexity while maintaining parameter flexibility. The UE simply needs to select from the pre-provided sets.
Solution Approach 2:
The patent uses an intermediary approach where the network side acts as a mediator that handles the complex configuration management. The network pre-configures multiple parameter sets and provides them to the UE through standardized interfaces (e.g., RRC signaling). This intermediary configuration approach shifts the complexity from the UE side to the network side, simplifying UE implementation while maintaining transmission parameter flexibility.
Data Source
AI summary
Method and devices are provided for wireless communication. A method involves obtaining, by a receive user equipment (UE), configuration information relating to a sidelink transmission between the first UE and a second UE, the configuration information for indicating to the first UE that the sidelink transmission is not associated with any corresponding sidelink control information (SCI). A further step involves receiving, by the receive UE, the sidelink transmission from the second UE using time and frequency resources indicated by the configuration information. Another method involves obtaining, by a transmit UE, configuration information relating to a sidelink transmission between the first UE and a second UE, the configuration information for indicating to the first UE that the sidelink transmission is not associated with any corresponding SCI and transmitting, by the first UE, the sidelink transmission to the second UE using time and frequency resources indicated by the configuration information.