Dynamic TTI Segmentation for 5G IoT Latency and Resource Trade-offs
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Solution Overview
Problem
Current communication systems face challenges in efficiently providing different types of services, such as VoLTE and mission-critical IoT, within the same time interval, especially when using a shortened transmission time interval (TTI) in unlicensed bands, which affects packet data latency and resource utilization.
Innovation Solution
A method and apparatus that allow user equipment (UE) and evolved NodeB (eNB) to operate using a transmission time interval shorter than 1 ms, enabling parallel service provision by determining a start point and time interval for uplink transmission based on received uplink scheduling information, optimizing resource allocation and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a shortened transmission time interval (TTI) is used in unlicensed bands, then packet data latency is reduced, but resource utilization and service coexistence become problematic
Solution Approach 1:
The patent segments the transmission time interval into different types (first type TTI and second type TTI) with different lengths. The first type TTI is used for latency-sensitive services while the second type TTI is used for other services, allowing the system to reduce packet data latency for specific services without compromising overall resource utilization. This segmentation enables selective application of shortened TTI only where needed.
Solution Approach 2:
The patent implements dynamic TTI length adjustment by allowing the eNB to flexibly configure and switch between different TTI types based on service requirements and channel conditions. The system can dynamically select appropriate TTI lengths for different services and time intervals, optimizing both latency performance and resource utilization adaptively rather than using a fixed TTI length.
2Adaptability or versatility
If different services are provided in parallel within the same time interval, then service diversity is improved, but interference management and resource allocation become complex
Solution Approach 1:
The patent applies different TTI configurations to different services and different time intervals, creating local quality variations in the resource allocation scheme. Each service can be assigned appropriate TTI characteristics (length, structure) tailored to its specific requirements, allowing diverse services to coexist in parallel while maintaining optimized performance for each service type without requiring complex universal resource allocation mechanisms.
Data Source
AI summary
Disclosed are: a communication technique for merging, with IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G system; and a system therefor. The present disclosure can be applied to intelligent services (for example, smart home, smart building, smart city, smart car or connected car, healthcare, digital education, retail, security and safety-related services, and the like) on the basis of 5G communication technology and IoT-related technology.