Multi-cell Scheduling for URLLC Latency Reduction
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Solution Overview
Problem
Current wireless communication systems face challenges in scheduling data transmissions and retransmissions within the same serving cell, leading to delayed retransmissions that fail to meet the low latency requirements of Ultra-Reliable Low-Latency Communication (URLLC) services.
Innovation Solution
The proposed solution involves scheduling related data transmissions across multiple cells and/or carriers, allowing for the minimization of scheduling delays by enabling retransmissions to be scheduled on different cells, rather than being constrained to the same serving cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If data retransmission is scheduled on the same serving cell, then scheduling simplicity is maintained, but scheduling latency increases and URLLC latency requirements cannot be met
Solution Approach 1:
The patent extends the scheduling domain from a single cell to multiple cells, utilizing spatial dimensionality to resolve the latency problem. By allowing retransmissions on different cells than the original transmission, the system can schedule retransmissions with lower latency without being constrained by the timing limitations of the same cell, thus addressing the URLLC latency requirements while managing scheduling complexity through multi-cell coordination
2Productivity
If multi-cell scheduling is implemented, then scheduling latency is reduced and URLLC requirements are met, but system complexity increases
Solution Approach 1:
The patent implements a universal scheduling mechanism that can operate both within a single cell and across multiple cells. The scheduling entity can select from multiple cells based on availability and requirements, making the system adaptable to different scenarios. This multi-functionality allows the system to achieve low latency for URLLC when needed while maintaining simplicity for常规 transmissions, thus improving productivity without proportionally increasing complexity
Data Source
AI summary
Methods, apparatus, and systems that enable scheduling of related data transmissions across multiple cells and/or carriers are disclosed. In one example aspect, a method for wireless communication includes processing, by a base station, a first data transmission for a user device on a first serving cell and transmitting, by the base station to the user device, a control message that includes a scheduling information of a second data transmission on a second cell that is different than the first serving cell. The control message indicates whether the second data transmission is a new data transmission or a retransmission of the first data transmission. The method also includes processing, by the base station, the second data transmission for the user device on the second cell according to the scheduling information.