Resource Pool Sharing for Network and Autonomous UE
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing resource pool sharing between network-scheduled and autonomous-scheduled wireless transmit/receive units (WTRUs), leading to potential resource collisions and inefficient spectral usage.
Innovation Solution
Implementing a system where WTRUs can operate in both network-scheduled and autonomous-scheduled modes, allowing them to select and reserve resources from a shared pool based on reference signal received power (RSRP) thresholds, and dynamically reselect resources to avoid collisions, with network-scheduled WTRUs reporting sensing results to the network and autonomously scheduled WTRUs performing resource selection and reselection based on detection of network-scheduled sidelink/V2X transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If network-scheduled and autonomous-scheduled WTRUs share the same resource pool, then resource utilization efficiency is improved, but resource collisions increase
Solution Approach 1:
The patent implements sensing mechanisms where autonomous-scheduled WTRUs perform measurements and detect reservations of network-scheduled transmissions before selecting resources. This preliminary detection allows the autonomous WTRU to identify and avoid resources already reserved by network-scheduled WTRUs, preventing collisions while enabling resource pool sharing.
Solution Approach 2:
The patent establishes feedback loops where WTRUs monitor the resource pool for reservations and adjust their resource selection based on detected transmissions. Network-scheduled WTRUs report sensing results to the network, which uses this feedback to make informed scheduling decisions, while autonomous WTRUs use feedback from detected signals to dynamically avoid colliding with network-scheduled transmissions.
2Reliability
If autonomous-scheduled WTRUs perform sensing and resource reselection, then resource collision avoidance is improved, but device complexity increases
Solution Approach 1:
The patent divides the resource management functionality into distinct segments: network-scheduled WTRUs handle sensing and reporting to the network, while autonomous-scheduled WTRUs perform resource selection and reselection based on detected reservations. This segmentation allows each WTRU type to focus on specific tasks, reducing individual device complexity while maintaining overall system reliability through collaborative resource management.
Data Source
AI summary
A wireless transmit/receive unit (WTRU) operating in an autonomous-scheduled mode may select a first resource from a resource pool. The WTRU may determine that the first resource is reserved for at least one sidelink transmission scheduled via a network-scheduled mode. The WTRU may evaluate the availability of resources in the resource pool based on determining that the first resource is reserved for the sidelink transmission. The WTRU may determine that a resource is available based on a measurement comparison to one or more thresholds. For example, there may be a first threshold for resources reserved by WTRUs operating using the network-scheduled mode and a second threshold for resources reserved by WTRUs operating using the autonomous-scheduled mode. The first threshold may be determined based on the second threshold and an offset value. The WTRU may reselect to a second resource in the resource pool based on the evaluated resource availability.