PDSCH Quality Reporting for Mixed Traffic Types
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Solution Overview
Problem
Current wireless communications networks face challenges in efficiently supporting a wide range of devices with diverse data traffic profiles and requirements, such as Ultra Reliable Low Latency Communications (URLLC) and Enhanced Mobile Broadband (eMBB), due to difficulties in interpreting quality reports for mixed traffic types and accurately determining transmission quality levels.
Innovation Solution
The method involves receiving indications of physical downlink shared channels and quality report types from the wireless communications network, determining the necessary transmission quality levels to achieve target block error rates, and transmitting these levels back to the network, allowing for more efficient use of radio resources and improved link adaptation schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the network supports a wide range of devices with different traffic profiles (URLLC, eMBB, IoT), then the network versatility and service coverage are improved, but the complexity of handling and interpreting quality reports for mixed traffic types increases
Solution Approach 1:
The patent segments quality reporting by introducing separate quality reports for different traffic types (e.g., URLLC quality reports and eMBB quality reports). Each quality report type is associated with specific PDSCHs carrying particular traffic types, allowing the network to handle and interpret quality metrics separately for each service category, thereby reducing the complexity of managing mixed traffic quality reports while maintaining support for diverse services
Solution Approach 2:
The patent applies local quality by determining transmission quality levels specific to each traffic type and PDSCH rather than using a unified quality metric. The network can request quality reports with different target BLERs for different traffic types (e.g., 10^-5 for URLLC, 10^-1 for eMBB), enabling tailored quality assessment and MCS selection for each local context or service type
2Reliability
If the network requests detailed quality reports for accurate MCS selection, then the transmission reliability is improved, but the uplink signaling overhead and processing burden increase
Solution Approach 1:
The patent implements partial action by having the network request quality reports selectively based on traffic type and service requirements rather than for all PDSCHs uniformly. The network can configure quality reporting for specific PDSCHs or PDSCH groups, and can choose to request quality reports for only certain traffic types (e.g., requesting URLLC quality reports but not eMBB quality reports in some cases), thereby reducing unnecessary signaling overhead while maintaining reliability for critical services
Solution Approach 2:
The patent changes parameters by introducing quality report types with different target BLERs (e.g., 10^-5, 10^-3, 10^-1) and different associated PDSCH configurations. This allows the network to adjust the granularity and detail of quality reporting based on service requirements, achieving reliable transmission for URLLC with high target BLER reports while using coarser reporting for eMBB, thus optimizing the balance between reliability and signaling overhead through parameter differentiation
Data Source
AI summary
A method comprising receiving, from a wireless communications network, an indication of one or more physical downlink shared channel, PDSCHs, to be received by a communications device from the wireless communications network via a radio access interface, receiving, from the wireless communications network, an indication of whether to report one or more quality report types, wherein each of the quality report types is associated with at least one of the PDSCHs, determining, for at least one of the quality report types, a transmission quality level with which the wireless communications network would need to transmit the associated PDSCHs such that the communications device would receive the associated PDSCHs at a target block error rate, BLER, and transmitting to the wireless communications network, for the at least one quality report type, an indication of the determined transmission quality levels.