Cyclic Prefix Coexistence for Mixed Numerology Traffic
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Solution Overview
Problem
Conventional systems fail to coexist effectively with different cyclic prefix lengths, particularly for mixed numerology on TDD carriers, limiting the simultaneous transmission of eMBB and URLLC traffic due to interference and alignment issues.
Innovation Solution
The method and system enable the coexistence of differing cyclic prefix lengths by employing resource puncturing, dynamic scheduling, and flexible frame structures, allowing for the simultaneous transmission of eMBB and URLLC traffic using orthogonal or non-orthogonal scheduling, with separate transmit chains for each numerology to mitigate interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different cyclic prefix types are used for different traffic types, then traffic transmission flexibility is improved, but system interference and alignment issues worsen
Solution Approach 1:
The system segments traffic into different types (eMBB and URLLC) and assigns different cyclic prefix types to different traffic types. This allows each traffic type to be transmitted with the most appropriate CP type, improving flexibility while managing interference through separation.
Solution Approach 2:
The system dynamically selects cyclic prefix types based on traffic requirements. The base station can switch between normal cyclic prefix and extended cyclic prefix depending on the traffic type being transmitted, enabling adaptive optimization of transmission performance.
2Adaptability or versatility
If resource puncturing is used for mixed numerology, then coexistence of different traffic types is improved, but decoding complexity and errors worsen
Solution Approach 1:
The system performs preliminary scheduling of resources before transmission, allocating specific time-frequency resources to different traffic types. This pre-planning allows the system to handle mixed numerology scenarios while minimizing decoding complexity and maintaining reliability.
Solution Approach 2:
The base station acts as an intermediary that manages resource allocation between different traffic types. It coordinates the transmission of eMBB and URLLC traffic with different numerologies, resolving conflicts and ensuring reliable decoding through centralized control.
3Object-affected harmful factors
If separate transmit chains are used for each numerology, then interference mitigation is improved, but device complexity worsens
Solution Approach 1:
The transmit function is segmented into separate chains for different numerologies. Each transmit chain is dedicated to a specific numerology type, which isolates interference between different traffic types while maintaining manageable complexity within each chain.
4Productivity
If dynamic scheduling is employed for traffic coexistence, then resource utilization efficiency is improved, but scheduling complexity and alignment issues worsen
Solution Approach 1:
The system employs dynamic scheduling that adapts to varying traffic conditions. The base station can adjust resource allocation, cyclic prefix types, and numerology parameters in real-time based on traffic demands, maximizing resource utilization while managing scheduling complexity through automated decision-making.
Data Source
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AI summary
Systems and methods of transmitting using different cyclic prefix types are provided. In some embodiments, the cyclic prefix type used changes on a per time interval based on characteristics of the traffic. In some embodiments, different cyclic prefix types are used simultaneously during a time interval for different traffic types.