Sidelink Resource Selection via Overheard Recommendations
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Solution Overview
Problem
In sidelink communications, resource conflicts arise due to near-simultaneous resource selection by co-located transmitter UEs, leading to interference, and hidden UEs' transmissions may not be detected, causing overlapping resource selections that result in interference.
Innovation Solution
A method where a UE deprioritizes or excludes resources that overlap with those indicated in an overheard resource recommendation from a third UE, minimizing the probability of resource conflicts by considering the cardinality, size, overlap extent, RSRP, CBR, and transmission priority of the recommended resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If UEs perform resource selection independently without considering other UEs' selections, then resource selection simplicity is maintained, but resource conflicts and interference increase
Solution Approach 1:
The patent implements a feedback mechanism where UE-A receives resource recommendation information from UE-C (third UE) and uses this feedback to adjust its resource selection for UE-B. The gNodeB sends resource recommendation information to multiple UEs, and each UE uses this feedback to deprioritize or exclude overlapping resources, thereby reducing resource conflicts while maintaining relatively simple independent selection operations.
2Reliability
If UEs consider all possible resource recommendations from all UEs, then resource conflict probability is reduced, but computational complexity and processing time increase
Solution Approach 1:
The patent applies local quality by having each UE process resource recommendations selectively based on local conditions. UE-A processes recommendations from UE-C only when and where they are relevant to UE-B's transmission. The system evaluates factors like spatial relationship, transmission priority, and resource overlap locally at each UE, avoiding the need to process all possible recommendations from all UEs globally.
Solution Approach 2:
The patent implements partial action by having UEs consider only the most relevant resource recommendations rather than all possible recommendations. UE-A considers recommendations from UE-C to the extent that they affect UE-B's resource selection, excluding irrelevant recommendations. This partial processing approach reduces computational complexity while still effectively preventing resource conflicts in critical scenarios.
3Productivity
If UEs prioritize their own transmission resources without considering hidden UEs, then transmission efficiency is improved, but interference from hidden UEs increases
Solution Approach 1:
The patent introduces the gNodeB as an intermediary that coordinates resource allocation between UEs. The gNodeB receives resource recommendation information from multiple UEs (including hidden UEs like UE-C) and uses this information to make informed resource allocation decisions. This intermediary approach allows UE-A to consider hidden UEs' resource needs without directly interacting with them, maintaining transmission efficiency while reducing interference.
Data Source
AI summary
In accordance with example embodiments of the invention there is at least a method performed by an apparatus including performing determining, by a first user equipment of more than one user equipment of a communication network, a first set of candidate radio resources for sidelink transmission by the first user equipment or a second user equipment of the more than one user equipment; receiving from a third user equipment a second set of preferred radio resources for sidelink transmission by at least one of the second user equipment, the third user equipment, or a fourth user equipment other than the first user equipment of the more than one user equipment; identifying at least one radio resource from the first set of candidate radio resources that overlaps at least partially with a radio resource in the second set of preferred radio resources; determining a subset of the first set of candidate radio resources based at least in part on the identified at least one overlapping radio resource; and at least one of selecting from the determined subset one or more radio resources for sidelink transmission by the first user equipment or transmitting the determined subset to the second user equipment.