Single DCI Scheduling for Multiple Transport Blocks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communications, particularly in 3GPP standards like LTE and NR, the network node faces challenges in efficiently scheduling uplink resources for wireless devices with multiple traffic flows having different latency and reliability requirements, leading to spectral inefficiencies and potential collisions during data transmission.
Innovation Solution
The implementation of a method that schedules multiple transport blocks using a single downlink control information message, with repetitions mapped to non-overlapping time-domain resources and shared physical resource blocks, allowing for flexible modulation and coding schemes, redundancy versions, priorities, and Quality-of-Service requirements, thereby optimizing resource allocation and reducing collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate DCI messages are used to schedule different transport blocks, then each transport block can be individually controlled, but control resource overhead increases and spectral efficiency decreases
Solution Approach 1:
The patent combines multiple transport block scheduling into a single DCI message by merging multiple TB indicators into one DCI format. This allows the network node to schedule multiple TBs (e.g., TB1 and TB2) with different QoS requirements using one consolidated control message, thereby reducing control resource overhead while maintaining individual TB control capabilities through separate indicator fields within the unified DCI structure.
2Reliability
If multiple transport blocks are scheduled with different QoS requirements, then reliability and latency performance improves, but resource allocation complexity increases
Solution Approach 1:
The patent applies local quality by assigning different QoS parameters (such as different TB indicators, redundancy versions, modulation and coding schemes) to different transport blocks within the same DCI message. This allows each TB to be optimized for its specific QoS requirements (e.g., TB1 for high reliability, TB2 for low latency) while using a unified scheduling framework, thereby managing complexity through localized differentiation rather than global complexity.
3Adaptability or versatility
If separate DCI messages are used for each transport block, then scheduling flexibility is maintained, but spectral efficiency decreases
Solution Approach 1:
The patent merges multiple scheduling decisions into a single DCI message that can simultaneously allocate resources for multiple transport blocks. This consolidation reduces the number of control channel transmissions required, thereby improving spectral efficiency. At the same time, the patent maintains scheduling flexibility by including individual TB indicators and QoS parameters for each TB within the unified DCI structure, allowing the network node to independently control each TB's transmission parameters.
4Measurement precision
If buffer status reporting is used to inform network node about data availability, then resource allocation accuracy improves, but delay increases due to reporting latency
Solution Approach 1:
The patent enables the network node to perform preliminary scheduling actions based on available information without waiting for complete buffer status reports. By using the unified DCI message to schedule multiple TBs proactively, the network node can allocate resources in advance and reduce waiting time, while still maintaining reasonable resource allocation accuracy through the TB indicators and QoS parameters included in the scheduling message.
Data Source
AI summary
A method, system and apparatus for methods and algorithms of data multiplexing at a physical (PHY) layer. A network node is configured to schedule using a single downlink control information, DCI, message a first transmission with repetition of a first transport block, TB, and a second transmission with repetition of a second TB, the repetitions of the first and second TBs being mapped to non-overlapping time-domain resources and the repetitions of first and second TBs being mapped to a same physical resource block, PRB, set; and trigger the first transmission with repetition of the first TB and the second transmission with repetition of the second TB based on the single DCI scheduling. A wireless device, WD, is configured to receive the single DCI message; and process the repetitions of the first TB and the repetitions of the second TB based at least in part on the single DCI scheduling.