5G URLLC Interference Handling via Indication Information
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Solution Overview
Problem
In 5G wireless communication systems, the allocation of resources for high-priority services like URLLC can lead to performance degradation of low-priority services like eMBB due to interference, as URLLC data is transmitted using shorter TTIs, causing eMBB terminals to misinterpret URLLC data as eMBB data, resulting in errors and increased retransmission requests.
Innovation Solution
A method where the base station and terminal exchange messages to determine the timing of interference impact information, allowing the base station to transmit interference impact information based on the terminal's capability to receive it, and the terminal to adaptively handle URLLC data by identifying impacted regions within the eMBB data transmission, improving demodulation and decoding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If URLLC data is transmitted using shorter TTIs to meet low latency requirements, then URLLC service performance is improved, but eMBB service reception performance deteriorates due to interference and misinterpretation of URLLC data as eMBB data
Solution Approach 1:
The patent segments the TTI structure by introducing different TTI lengths for different services. URLLC uses short TTI (sTTI) with duration of 2 or 3 OFDM symbols, while eMBB uses normal TTI. This segmentation allows URLLC to achieve low latency independently without affecting eMBB service reliability, as the different TTI structures are clearly distinguished in the time domain.
Solution Approach 2:
The patent introduces an intermediary mechanism in the form of indication information that signals the presence and position of URLLC data within eMBB resource allocations. This intermediary information allows eMBB terminals to identify and exclude URLLC data regions from eMBB data reception, preventing misinterpretation and maintaining eMBB service reliability while allowing URLLC transmission.
2Reliability
If resources are allocated for high-priority URLLC services, then URLLC service quality is improved, but eMBB service performance deteriorates due to resource interference and misinterpretation errors
Solution Approach 1:
The patent applies preliminary action by transmitting indication information about URLLC data position and presence before the eMBB terminal attempts to receive eMBB data. This advance notification allows the terminal to pre-identify and exclude URLLC data regions, preventing misinterpretation errors and information loss in eMBB reception while ensuring URLLC resources are properly allocated.
Solution Approach 2:
The patent implements a feedback mechanism where the base station transmits indication information to terminals about URLLC data allocation. This feedback loop enables terminals to adjust their reception behavior accordingly, avoiding interference with URLLC transmission and maintaining both URLLC service quality and eMBB data reception accuracy.
3Ease of operation
If eMBB terminals receive signals in normal TTI without awareness of URLLC transmission, then eMBB reception simplicity is maintained, but error rate increases due to misinterpretation of URLLC data as eMBB data
Solution Approach 1:
The patent introduces an intermediary indication information mechanism that provides terminals with awareness of URLLC transmission without complicating the basic eMBB reception process. The terminal simply needs to check the indication information and exclude marked regions, maintaining operational simplicity while dramatically improving reception accuracy by preventing misinterpretation of URLLC data.
Solution Approach 2:
The patent extracts URLLC data regions from the overall resource allocation and marks them separately through indication information. This extraction allows eMBB terminals to maintain simple reception procedures for the majority of resources while selectively excluding the small portion of resources used for URLLC, thereby improving accuracy without significantly complicating operation.
Data Source
AI summary
A communication scheme and system for converging a 5th generation (5G) communication system for supporting a data rate higher than that of a 4th generation (4G) system with an internet of things (IoT) technology are provided. The communication scheme is applicable to intelligent services (e.g., smart homes, smart buildings, smart cities, smart cars, connected cars, health care, digital education, retail, and security and safety-related services) based on the 5G communication technology and the IoT-related technology.