V2X Resource Allocation Feedback for IBE and Hidden Nodes
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Solution Overview
Problem
In V2X communication, the In-Band-Emission (IBE) and hidden node problems occur due to varying emission powers and distances between user equipment (UEs), leading to interference and resource conflicts, especially in NR V2X mode2, where unicast and multicast communications are supported, and existing methods like Zone ID division are ineffective.
Innovation Solution
The method involves determining conflicts between reserved resources of sender and interferer UEs by receiving SCI information, generating auxiliary information to indicate conflicts, and adjusting resources based on this information to resolve IBE and hidden node issues, thereby improving resource allocation accuracy and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resource is autonomously selected by user equipment in mode2, then resource allocation flexibility and communication efficiency are improved, but resource conflicts and interference (IBE and hidden node problems) occur due to varying emission powers and distances
Solution Approach 1:
The patent implements a feedback mechanism where receiver UEs monitor resources and send feedback information to sender UEs about detected resource conflicts and interference conditions. This allows sender UEs to adjust their resource selection based on actual channel conditions and interference levels, resolving the contradiction between autonomous resource selection flexibility and resource allocation reliability.
Solution Approach 2:
The patent introduces a resource perception window before the resource selection window where UEs perform preliminary resource monitoring and measurement. By conducting preliminary actions (resource perception, RSRP measurement, candidate resource determination) before final resource selection, the system reduces the likelihood of selecting conflicting resources while maintaining autonomous operation flexibility.
2Adaptability or versatility
If UEs use different emission powers based on distance, then communication coverage and adaptability are improved, but interference to other UEs increases causing IBE problems
Solution Approach 1:
The patent applies local quality by having different UEs use different emission powers tailored to their specific communication distances and channel conditions. Each UE adjusts its transmission power locally based on its own requirements rather than using a uniform power level, which improves communication adaptability while the feedback mechanism ensures that high-power transmissions do not cause harmful interference to other UEs.
Solution Approach 2:
The patent converts the potentially harmful effect of high emission power into a beneficial signal by using the strength of the received signal (RSRP) as a metric for resource quality assessment. Strong signals indicate good channel conditions and successful reception, while the feedback mechanism ensures that such high-power transmissions do not become harmful interference to other communications.
3Speed
If UEs autonomously select resources without coordination, then resource allocation speed is improved, but resource conflicts occur leading to transmission failures
Solution Approach 1:
The patent maintains fast autonomous resource allocation by introducing a preliminary resource perception phase before the selection phase. UEs perform resource monitoring, measurement, and candidate determination in advance, which reduces the need for complex real-time coordination while minimizing resource conflicts and improving transmission reliability.
Solution Approach 2:
The patent enables UEs to self-manage resource allocation through autonomous selection combined with self-generated feedback. Each UE independently monitors resources, selects candidates, and provides feedback about its resource usage and detected conflicts, allowing the system to maintain high allocation speed while improving reliability through distributed self-service mechanisms.
Data Source
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AI summary
Disclosed are a method, system, and device for processing resource allocation in V2X communication, and a medium. The method for processing resource allocation in V2X communication is applied to a receiving UE. The method for processing resource allocation in V2X communication comprises: determining whether resources reserved by an interfering UE conflict with resources reserved by a sending UE; if the determination result is that a conflict exists, then generating auxiliary information and sending the auxiliary information to the sending UE, the auxiliary information being used to indicate conflict. Thus, the sending UE can clearly learn the situation on the receiving UE side when perceptively selecting resources such that the sending UE uses auxiliary information to adjust resources so as to resolve conflict.