FR2 Sidelink RRC Coordination for Inter-UE Interference Mitigation
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Solution Overview
Problem
Existing sidelink communication technologies face challenges in managing inter-UE interference, particularly during beam sweeping procedures, leading to potential interference between communication links of user equipment (UEs) that do not intend to communicate directly with each other.
Innovation Solution
User equipment (UEs) establish or maintain a radio resource control (RRC) connection to exchange interference mitigation information, allowing them to adjust time-frequency resources to mitigate or avoid interference by coordinating resource usage among UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UEs perform beam sweeping procedures to locate each other for sidelink communication, then communication capability is improved, but inter-UE interference increases
Solution Approach 1:
The patent introduces an intermediary mechanism where UEs exchange interference mitigation information through RRC connections. This intermediary information exchange allows UEs to coordinate their beam sweeping activities and resource usage, reducing interference while maintaining communication capability. The RRC connection acts as a mediator channel for negotiating resource allocation between potentially interfering UEs.
Solution Approach 2:
The patent implements a feedback mechanism where UEs monitor and report interference conditions to each other via RRC connections. Based on received interference mitigation information, UEs can adjust their beam sweeping patterns and resource selection dynamically. This closed-loop feedback system enables continuous optimization of resource allocation to minimize inter-UE interference while preserving sidelink communication functionality.
2Reliability
If UEs establish RRC connections to manage interference coordination, then interference mitigation is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by establishing RRC connections and exchanging interference mitigation information before actual sidelink communication begins. UEs proactively negotiate resource allocation and identify potential interference scenarios in advance, allowing them to prevent interference issues rather than react to them. This preliminary coordination reduces the need for complex real-time interference management during active communication.
Solution Approach 2:
The patent enables UEs to self-manage interference coordination through autonomous RRC connection establishment and interference mitigation information exchange. Each UE independently monitors its own interference conditions and initiates RRC connections with potentially interfering UEs to negotiate resource allocation. This self-service approach reduces the need for centralized network control, simplifying overall system complexity while maintaining reliable interference mitigation.
Data Source
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AI summary
A first UE may determine to communicate with a second UE, but may maintain or establish a RRC connection with a third UE upon determining that potential interference may occur between the first UE and the third UE. The potential inference may be a received interference in which the first UE receives interference from the third UE as a result of a communication between the third UE and a fourth UE, or a transmitted interference in which the first UE causes interference to the third UE as a result of a communication between the first UE and the second UE. The first UE may communicate mitigation information to the third UE through the RRC connection, where the interference mitigation information may be associated with the communication between the first UE and the second UE or the communication between the third UE and the fourth UE.