Dynamic Downlink Control Information Scheduling in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems, such as LTE, face challenges in efficiently transmitting downlink control information with dynamic variable sizes, which affects the flexibility and efficiency of data transmission.
Innovation Solution
A method and apparatus for user equipment (UE) to detect and receive downlink control information from a base station, where the information includes indicators for scheduling at either the transport block or code block level, allowing for dynamic configuration of uplink or downlink data transmission/reception, and varying the size of the control information based on these indicators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If downlink control information is transmitted with fixed size, then device complexity is reduced, but adaptability to varying data transmission requirements deteriorates
Solution Approach 1:
The downlink control information is designed with dynamic variable size capability, allowing the payload length to be adjusted according to the actual scheduling requirements. The indicator field dynamically signals whether code block level or transport block level scheduling is applied, enabling the control information size to adapt to different data transmission scenarios without fixed constraints.
Solution Approach 2:
The payload size of the downlink control information is changed as a variable parameter based on the scheduling level indicator. When code block level scheduling is indicated, the payload includes detailed code block information; when transport block level scheduling is indicated, the payload structure is simplified. This parameter change approach allows the system to optimize between adaptability and processing complexity.
2Measurement precision
If downlink control information includes detailed code block level scheduling, then scheduling precision is improved, but information transmission overhead increases
Solution Approach 1:
The downlink control information structure implements local quality by including detailed code block level scheduling fields only when necessary. The indicator field enables selective inclusion of code block level details (such as code block group information) only for specific code blocks requiring granular control, while other portions can use coarser transport block level scheduling, thus optimizing the balance between precision and overhead.
Solution Approach 2:
The control information is segmented into different scheduling levels: transport block level scheduling for overall data blocks and code block level scheduling for specific segments within transport blocks. This segmentation allows the system to apply detailed precision only where needed (specific code blocks) while using coarser control for other portions, reducing overall information overhead while maintaining necessary precision.
3Reliability
If the indicator field is always present in downlink control information, then reliability of scheduling indication is improved, but device complexity increases
Solution Approach 1:
The indicator field within the downlink control information serves a dual purpose: it reliably indicates the scheduling level (code block or transport block) while simultaneously enabling the receiving device to self-adjust the processing complexity. By detecting the indicator value, the device can automatically determine whether to perform detailed code block level processing or simplified transport block level processing, thus maintaining reliability while allowing complexity to adapt to the actual scheduling requirements.
Data Source
AI summary
A method in a wireless communication system is disclosed. More particularly, the method comprises the steps of: detecting first downlink control information from a base station; and, on the basis of the first downlink control information, receiving from the base station second downlink control information comprising scheduling information for uplink data transmission or downlink data reception, wherein the first downlink control information comprises an indicator for indicating whether the scheduling information is scheduling information of a transmission block level or scheduling information of one or more code block levels comprising the transmission block.