Inter-Cell Muting Coordination for URLLC Interference Mitigation
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Solution Overview
Problem
Current wireless communication systems face challenges in mitigating interference, particularly in ultra-reliable low-latency communication (URLLC) scenarios, where bursty and short-duration transmissions lead to reduced coverage and reliability, especially for cell-edge user equipment (UEs).
Innovation Solution
The implementation of a muting mechanism through inter-cell coordination, where network entities identify and transmit muting messages to neighboring cells to avoid scheduling communications on occupied time or frequency resources, thereby reducing inter-cell interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inter-cell coordination muting is implemented, then interference mitigation and reliability are improved, but device complexity and signaling overhead increase
Solution Approach 1:
The system performs preliminary actions by identifying and reserving time-frequency resources for URLLC transmissions before actual data transmission occurs. Network entities exchange muting messages in advance to prevent scheduling conflicts, ensuring that resources are protected from interference before the interference can occur. This proactive approach improves reliability by preventing interference rather than reacting to it.
Solution Approach 2:
Muting messages serve as intermediaries between network entities, carrying information about reserved resources without requiring direct coordination during actual data transmission. These messages act as a signaling mechanism that enables interference mitigation while maintaining relatively simple device operation, as the complex coordination is handled through standardized message exchange rather than continuous real-time negotiation.
2Reliability
If time-frequency resources are reserved for URLLC, then packet success rate is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The system applies partial action by reserving resources selectively rather than continuously. Muting messages indicate specific time-frequency resources that should be avoided, rather than preventing all transmissions. This allows eMBB transmissions to occur in non-muted resources, maintaining resource utilization efficiency while providing sufficient protection for URLLC transmissions to achieve high packet success rates.
Solution Approach 2:
The system changes parameters dynamically by adjusting which time-frequency resources are muted based on actual URLLC traffic patterns. When URLLC transmissions are scheduled, specific resources are protected; when no URLLC traffic is present, fewer resources are muted, allowing eMBB to utilize available capacity. This dynamic parameter adjustment balances reliability and resource efficiency.
Data Source
AI summary
Aspects described herein relate to interference mitigation for communication with muting via inter-cell coordination. In one example, a network entity such as a cell may identify a time or frequency resource allocated for communication with a user equipment (UE), and transmit, to a neighboring network entity, a muting message indicating that the time or frequency resource is occupied for communication. In another example, the network entity may receive, from a neighboring network entity, a muting message indicating that a time or frequency resource is occupied for communication. The network entity may further forgo scheduling of an uplink or downlink transmission to a UE on the indicated time or frequency resource. The network entity may further schedule data for uplink or downlink transmission with the UE on a different time or frequency resource.