Multi-Stream DCI Signaling for 5G Codeword Scheduling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Advanced wireless communication systems face challenges in efficiently scheduling multiple codewords for data transmission and reception, particularly in next-generation cellular systems like 5G, which require seamless and low-latency radio resource management across various use cases and frequency bands.
Innovation Solution
The implementation of a method and apparatus for multi-stream transmission in wireless communication systems, where a user equipment (UE) and base station (BS) use DCI signaling to identify and schedule parameters for a first codeword and indications for additional codewords, enabling efficient control signaling for N≥1 codewords, facilitating flexible and adaptive resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional DCI signaling is used for scheduling multiple codewords, then the control signaling overhead increases, but the ability to support multi-stream transmission is limited
Solution Approach 1:
The DCI signaling is segmented into two parts: a first DCI message that schedules a first codeword, and a second DCI message that schedules additional codewords. This segmentation allows the system to support multi-stream transmission by distributing scheduling information across multiple messages, reducing the overhead in any single message while enabling flexible multi-codeword scheduling.
Solution Approach 2:
The patent introduces a time-dimensional approach by using multiple DCI messages transmitted at different times to schedule multiple codewords. Instead of packing all codeword scheduling information into a single DCI message (spatial dimension), the solution distributes it across multiple transmission instances, effectively using the time dimension to manage signaling overhead while supporting multi-stream transmission.
2Adaptability or versatility
If separate DCI messages are used for each codeword, then the signaling flexibility improves, but the latency increases
Solution Approach 1:
The first DCI message is transmitted in advance to schedule the first codeword, establishing preliminary resource allocation. Subsequent DCI messages then schedule additional codewords with reference to the initial allocation. This preliminary action reduces latency by avoiding the need to include all scheduling information in a single delayed message, while maintaining signaling flexibility through incremental updates.
3Adaptability or versatility
If unified radio resource management is implemented across various use cases, then the system adaptability improves, but the complexity of resource allocation increases
Solution Approach 1:
The DCI signaling mechanism is designed with universal applicability across different 5G use cases (eMBB, URLLC, mMTC). The same two-part DCI structure can accommodate various service requirements by adjusting the number of additional codewords scheduled in the second message, enabling unified resource management without requiring separate mechanisms for each use case.
Data Source
AI summary
Methods and apparatuses for control signaling for multi-stream transmission. A method for operating a user equipment (UE) includes receiving a downlink (DL) control information (DCI) signaling and identifying, from the DCI signaling, parameters for a first codeword and an indication of control signaling for parameters for N−1 additional codewords. N is a number of codewords scheduled for the UE and N≥1.