Sidelink Resource Coordination with Signal Strength and Priority
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In sidelink communications, wireless devices face challenges in efficiently identifying and reserving available resources to avoid collisions due to limited information about the availability of communication resources at other devices' locations.
Innovation Solution
A wireless device determines signal strength and priority information associated with sidelink communication resources and generates a message to transmit coordination information to another device, enabling it to select available resources and avoid collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless devices perform sidelink communications without network support (Mode 2 operation), then device autonomy and flexibility are improved, but resource collision and coordination difficulty increase
Solution Approach 1:
Wireless devices transmit coordination information containing resource availability indicators and signal strength measurements to neighboring devices. This feedback mechanism enables autonomous devices to make informed resource selection decisions without network support, resolving the contradiction between device autonomy and collision avoidance.
Solution Approach 2:
The patent introduces coordination information as an intermediary message that mediates resource allocation between autonomous devices. This intermediary carries resource availability data and priority information, enabling indirect coordination without direct network involvement, thus maintaining both autonomy and reliability.
2Device complexity
If wireless devices contend for communication resources autonomously, then network dependency is reduced, but information accuracy about resource availability at other devices' locations deteriorates
Solution Approach 1:
Wireless devices perform preliminary measurements of signal strength and determine resource availability indicators before resource selection. This preliminary action captures accurate information about the radio environment and other devices' resource usage, compensating for the lack of network-provided information in autonomous Mode 2 operation.
Solution Approach 2:
The patent uses coordination information to copy and share resource availability data between devices. Each device creates a local view of resource availability based on received coordination information from neighbors, effectively copying network-like information distribution without requiring network infrastructure.
3Productivity
If wireless devices select sidelink communication resources autonomously, then communication efficiency may be improved, but coordination accuracy between devices deteriorates due to limited information
Solution Approach 1:
The patent changes the parameters used for resource selection from simple random selection to measurements based on signal strength (e.g., RSRP) and priority information. By using these refined parameters, devices achieve more accurate resource selection decisions that balance communication efficiency with coordination accuracy in autonomous Mode 2 operation.
Data Source
AI summary
Embodiments include systems and methods for sidelink communications. In embodiments, a processor of a wireless device may determine signal strength information and priority information associated with a sidelink communication resource. The processor may determine coordination information based on the determined signal strength information and priority information. The processor may generate a message to include the determined coordination information. The processor may transmit the generated message including the determined coordination information to a second wireless device. In some embodiments, the generated message may be a control message, such as a medium access control control-element (MAC-CE) or a sidelink control information message.