Selective DCI Micro-Transmission for Small Data Packets
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Solution Overview
Problem
In wireless communication systems, particularly in LTE networks, there is inefficiency in data transmission when a base station has less data to send, as it often allocates entire PRBs, leading to unused resource elements, especially in machine-type communications where small data packets are common.
Innovation Solution
The base station determines if the amount of data to be transmitted exceeds a threshold; if not, it transmits the data directly within the DCI message on the PDCCH instead of allocating PDSCH resources, optimizing resource usage by avoiding unnecessary allocation of PDSCH resources for small data packets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station allocates entire PRBs for data transmission, then the data can be transmitted reliably, but resource elements are wasted when the data amount is small
Solution Approach 1:
The patent segments the transmission resource allocation into two distinct paths: traditional PDSCH allocation for large data packets and direct DCI message embedding for small data packets. This segmentation allows the system to choose the appropriate transmission method based on data size, thereby avoiding resource wastage while maintaining transmission reliability.
Solution Approach 2:
The patent changes the transmission parameter by introducing a threshold-based decision mechanism. When the data size is below the threshold, the system changes from allocating PDSCH resources to directly embedding data in the DCI message. This parameter change enables efficient resource utilization for small data transmissions while preserving reliability through the structured DCI format.
2Stability of the object's composition
If the base station allocates PDSCH resources for small data packets, then the data transmission structure remains consistent, but bandwidth utilization decreases due to unused resource elements
Solution Approach 1:
The patent introduces a dynamic transmission structure that adapts to data size. Instead of always using the static PDSCH allocation structure, the system dynamically switches to direct DCI embedding when data is small. This dynamic approach maintains structural consistency for large transmissions while optimizing bandwidth utilization for small transmissions.
Solution Approach 2:
The patent applies partial action by using only the necessary resources for small data transmission through DCI embedding, rather than allocating the full PDSCH resources. This partial resource utilization avoids the excessive allocation problem while maintaining sufficient transmission reliability for small data packets.
3Adaptability or versatility
If the base station uses traditional PDSCH allocation method, then all data sizes can be handled uniformly, but resource efficiency deteriorates for machine-type communications with small data packets
Solution Approach 1:
The patent makes the DCI message multi-functional by enabling it to carry both control information and data payload. This universal approach allows the DCI to serve dual purposes: traditional control signaling and small data transmission. Consequently, the system achieves resource efficiency for small packets while maintaining versatility in handling different data sizes through the unified DCI structure.
Data Source
AI summary
When a base station has just a small amount of data to transmit to a served UE, the base station will transmit the data to the UE in a DCI message on a PDCCH, rather than using the DCI message to allocate PDSCH resources to carry the data and transmitting the data on the allocated PDSCH resources. Further, the base station could advantageously make use of a standard DCI message format but could transmit the data in DCI message fields that would otherwise be used to allocate PDSCH resources or otherwise to facilitate PDSCH transmission, since those DCI message fields would not be needed when the data is transmitted in the DCI message itself.