Adaptive DCI Field Compression for Multi-Block Scheduling
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Solution Overview
Problem
Existing methods for sending downlink control information (DCI) in Machine Type Communication (MTC) systems face challenges in efficiently managing the number of bits allocated for resource allocation and modulation/demodulation scheme indications without compromising the flexibility of data transmission, particularly when scheduling multiple transmission blocks.
Innovation Solution
A method and apparatus for sending DCI that dynamically adjusts the compression of information fields based on the number of transmission blocks, allowing flexible scheduling while limiting the overall bit count by employing various compression strategies for PRB and MCS fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of bits for resource allocation and modulation/demodulation scheme indications is increased to schedule multiple transmission blocks, then the scheduling flexibility is improved, but the DCI overhead increases
Solution Approach 1:
The patent applies dynamics by making the DCI format adaptive based on the number of transmission blocks to be scheduled. The base station determines the appropriate DCI format (e.g., Format 1_0, Format 1_1, or Format 2_0) dynamically according to the scheduling requirements, allowing the system to adjust the information field configuration to match the actual number of blocks being transmitted, thereby optimizing the balance between flexibility and overhead.
Solution Approach 2:
The patent changes the parameter of information field configuration based on the number of transmission blocks. Different DCI formats are selected with different field configurations (e.g., different numbers of resource allocation fields, modulation and coding scheme fields, and redundancy version fields) according to the actual scheduling needs, allowing efficient utilization of bits for the given number of blocks.
2Quantity of substance
If compression strategies are applied to PRB and MCS fields to limit bit count, then the DCI overhead is reduced, but the scheduling flexibility may be compromised
Solution Approach 1:
The patent applies local quality by differentiating the compression treatment for different information fields within the DCI. Specifically, the resource allocation fields and modulation and coding scheme fields are compressed differently based on their specific requirements and the number of transmission blocks, while other fields maintain their standard configurations, allowing optimized bit allocation without compromising overall scheduling flexibility.
Solution Approach 2:
The compression strategy is applied dynamically based on the number of transmission blocks being scheduled. The base station determines the appropriate compression level and DCI format according to the actual scheduling requirements, allowing the system to adjust the compression intensity to match the number of blocks, thereby optimizing the balance between overhead reduction and scheduling flexibility.
Data Source
AI summary
A method and an apparatus for sending downlink control information (DCI). The method includes: obtaining a number of transmission blocks scheduled by the DCI; determining whether to compress an information field in the DCI based on the number of the transmission blocks; and sending the DCI based on a compressing mode in response to determining to compress.