Sidelink Resource Sensing Thresholds for sTTI Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing resource allocation and interference between terminals using short and normal transmission time intervals (TTIs), particularly in next-generation systems requiring low latency and high data transfer rates, where coexistence of sTTI and nTTI packets can lead to interference and inefficient resource utilization.
Innovation Solution
A method for determining the priority of sTTI packet transmission and using threshold-based resource sensing to optimize the transmission of sTTI and nTTI packets, including configuring packet transmission priority and adjusting demodulation and resource selection thresholds to minimize interference and ensure efficient resource use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If sTTI and nTTI packets coexist in the wireless communication system, then data transfer rate and low latency are improved, but in-band interference and resource allocation complexity increase
Solution Approach 1:
The resource pool is segmented into type 1 resources allocated for nTTI packets and type 2 resources allocated for sTTI packets. This segmentation prevents interference between the two packet types by assigning them dedicated resource pools, while still allowing both to coexist in the same wireless communication system to achieve high data transfer rates and low latency.
2Reliability
If resource sensing threshold is lowered to detect more occupied resources, then interference avoidance is improved, but resource selection efficiency deteriorates
Solution Approach 1:
Different resource sensing thresholds are applied to different resource types. A first threshold is used for sensing type 1 resources (nTTI) and a second, different threshold is used for sensing type 2 resources (sTTI). This local differentiation allows the system to optimize interference avoidance for each packet type while maintaining efficient resource selection overall.
3Loss of time
If priority-based transmission is implemented for sTTI packets, then latency is reduced, but device complexity increases
Solution Approach 1:
Priority values for different packet types are predetermined and configured in advance. When a packet needs transmission, the system simply retrieves the pre-configured priority value associated with that packet type rather than performing complex real-time priority calculations. This preliminary configuration reduces latency while keeping the transmission device complexity manageable.
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3
AI summary
Disclosed are a method for performing sidelink transmission in a wireless communication system and an apparatus therefor. Specifically, the method performed by a first UE may include: receiving a reference signal from a second terminal; calculating a measurement value by using the received reference signal; determining whether the calculated measurement value is equal to or smaller than a predetermined threshold, wherein the predetermined threshold is set by a ratio between a first transmission time interval and a second transmission time interval supported by the first terminal; and transmitting, to the second terminal, a signal generated according to the second transmission time interval by using a resource through which the reference signal is received when the calculated measurement value is equal to or smaller than the predetermined threshold, in which a length of the second transmission time interval may be shorter than the length of the first transmission time interval.