Sidelink Resource Pool Sharing for Low-Power V2X UEs
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Solution Overview
Problem
Existing sidelink communication technologies in V2X scenarios face high power consumption due to continuous sensing and transmission operations, particularly in low power nodes like V2P UEs, which is not efficient for meeting the stringent QoS requirements of 5G NR V2X communications.
Innovation Solution
Implementing an implicit resource pool sharing mechanism where high power nodes and nodes share the same resource pools, with LPNs, where resources are shared based on predetermined priorities or preferences, and utilizing RSU resource reservation mechanisms, allowing LPNs to select resources from these pools without full sensing, and using RSU resource reservation to manage LPN resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous sensing and transmission operations are implemented for sidelink communication, then communication reliability and QoS requirements are met, but power consumption increases significantly
Solution Approach 1:
The patent segments the resource pool into different types (first resource pool and second resource pool) with different sensing requirements. LPNs use the first resource pool with relaxed sensing while HPNs use the second resource pool with full sensing, allowing differentiated power consumption based on device type and service requirements.
Solution Approach 2:
Different sensing requirements are applied locally to different resource pools. The first resource pool applies relaxed sensing conditions suitable for LPNs, while the second resource pool applies full sensing conditions for HPNs, allowing each node to operate with appropriate power consumption levels.
2Reliability
If LPNs perform full sensing operations to ensure reliable communication, then communication quality is maintained, but battery life is reduced
Solution Approach 1:
The patent applies partial sensing to LPNs instead of full sensing. LPNs perform sensing only for specific resource pools or under relaxed conditions, which is sufficient for their service requirements but consumes significantly less power, thereby extending battery life.
Solution Approach 2:
The patent treats sensing operations as a consumable resource. By allowing LPNs to use relaxed sensing and by having HPNs perform full sensing when needed, the system optimizes the balance between communication quality and power consumption, accepting that LPNs may have shorter operational duration before battery depletion.
3Productivity
If resource pools are shared between HPNs and LPNs, then resource utilization efficiency improves, but conflict and interference between different node types increase
Solution Approach 1:
The patent segments the resource pool into first resource pools for LPNs and second resource pools for HPNs. This segmentation allows both node types to share the overall resource space while maintaining separate sensing and transmission domains, reducing interference and conflict between LPNs and HPNs.
Solution Approach 2:
The patent introduces resource indication information as an intermediary mechanism. When an HPN transmits in the second resource pool, it includes resource indication information that allows LPNs to identify and avoid these resources, thereby mediating the potential conflict and enabling efficient sharing without direct interference.
Data Source
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AI summary
Example sidelink communication methods and apparatus are described. One example method includes determining resources for potential transmission from a resource pool on a sidelink by a terminal device. The terminal device transmits a resource indication message on the sidelink, where the resource indication message includes a configuration of the resources that are determined for potential transmission. The configuration of the resources indicates a subset of the resources that are usable by first type of user equipments (UEs) and a subset of the resources that are usable by second type of UEs. The resource indication message is sent in a sidelink control information (SCI) message. The terminal device receives an indication of selected resources from at least one second type of UE, and transmits the indication of selected resources to at least another UE.