Subslot Configuration for URLLC Interference Mitigation
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Solution Overview
Problem
Current 5G New Radio (NR) technology faces challenges in efficiently communicating ultra-reliable low-latency communication (URLLC) content due to interference from enhanced mobile broadband (eMBB) traffic, requiring improved subframe configurations to mitigate interference and ensure reliable data transmission.
Innovation Solution
Configuring subframes with a subslot configuration that includes multiple subslots, each comprising a data/control information portion, a gap, and an acknowledgment (ACK)/negative acknowledgment (NACK) portion, with the ability to puncture eMBB data/control information with URLLC content and adjust symbol numbers based on content requirements, and coordinating neighboring base stations to reduce transmission power during URLLC subslots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If subframes are configured with multiple subslots to support URLLC content, then reliability and latency of URLLC communication are improved, but interference from eMBB traffic increases and resource allocation complexity increases
Solution Approach 1:
The subframe is segmented into multiple subslots, with specific subslots designated for URLLC content transmission. This segmentation allows URLLC traffic to occupy only the necessary time resources while leaving other subslots available for eMBB traffic, thereby reducing interference between the two traffic types while ensuring reliable low-latency communication for URLLC.
Solution Approach 2:
The patent introduces a new time-domain dimension by creating subslots within subframes, adding a hierarchical structure to the time resource allocation. This dimensional change enables fine-grained control over resource allocation, allowing URLLC content to be transmitted in specific subslots without affecting the overall subframe structure used for eMBB traffic.
2Adaptability or versatility
If subframes are configured with multiple subslots with different symbol numbers, then adaptability to different content requirements is improved, but device complexity and configuration management difficulty increase
Solution Approach 1:
The number of symbols in the first portion of each subslot is made configurable and can be dynamically adjusted based on the specific content requirements. This dynamic configuration allows the system to adapt to different URLLC and eMBB traffic patterns while maintaining a standardized subframe structure, balancing adaptability with manageable complexity through flexible parameter settings.
Data Source
AI summary
An apparatus may configure x subframes with a subslot configuration that includes y subslots, y being greater than x. In an aspect, each subslot of the y subslots may include a first portion having one or more symbols for carrying at least one of data or control information, a second portion having a gap, and a third portion for carrying ACK/NACK information associated with the first portion. In an aspect, the second portion may be between the first portion and the third portion. In an aspect, the second portion and the third portion may include at most one symbol. The apparatus may send information indicating the subslot configuration to at least one neighboring base station. The apparatus may communicate content with a user equipment (UE) during at least one of the y subslots.