Dynamic TTI Control for Low Latency Mobile Communication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In mobile communication systems, shortening the transmission time interval (TTI) to achieve low latency services increases control information overhead and power consumption due to increased transmissions of control information, and inefficient resource allocation methods are used, particularly in vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communications.
Innovation Solution
A method and apparatus that dynamically adjust time intervals for transmitting control information based on delay time requests from terminals, configuring control regions using shortframes, and optimizing resource allocation by varying the size of resource blocks inversely proportional to TTI size, reducing unnecessary transmissions and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the transmission time interval (TTI) is shortened to achieve low latency services, then the latency is reduced, but the control information overhead is increased
Solution Approach 1:
The patent applies dynamics by making the TTI length adjustable rather than fixed. The system can dynamically select from multiple TTI lengths (e.g., 1 ms, 0.5 ms, 0.25 ms) based on service requirements, allowing optimization between latency and overhead for different scenarios.
Solution Approach 2:
The patent changes the parameter of TTI length from a fixed value to a variable parameter that can be configured based on service type and network conditions. This allows the system to adapt the time interval parameter to balance between achieving low latency and minimizing control information overhead.
2Loss of time
If the transmission time interval (TTI) is shortened, then the latency is reduced, but the power consumption of terminals is increased
Solution Approach 1:
The system dynamically adjusts TTI length based on terminal capabilities and service requirements. Terminals with lower power consumption requirements can use longer TTIs, while those requiring low latency can use shorter TTIs, optimizing the energy-time tradeoff for each terminal.
Solution Approach 2:
The patent introduces parameter changes by allowing configurable TTI lengths that can be selected based on terminal power consumption characteristics. This enables the system to adjust the time parameter to balance between latency performance and power consumption for different terminal types.
3Loss of time
If the transmission time interval (TTI) is significantly reduced, then the latency is reduced, but the resource allocation efficiency is decreased
Solution Approach 1:
The patent applies dynamics by making resource allocation parameters adaptive to the TTI length. The system dynamically adjusts resource allocation granularity and scheduling parameters based on whether short or long TTIs are used, maintaining efficient resource utilization across different latency scenarios.
Solution Approach 2:
The patent changes resource allocation parameters such as resource block group size and scheduling interval based on the TTI length. This parameter adaptation ensures that resource allocation remains efficient whether the system operates with short TTIs for low latency or longer TTIs for improved resource utilization.
Data Source
AI summary
Disclosed are a method and apparatus for transmitting information in a low latency mobile communication system. Delay time requests are obtained from terminals, and time intervals for transmitting control information for the respective terminals are determined on the basis of the delay time requests. Control information is transmitted to the respective terminals according to the determined time intervals.