Dynamic Transmission Time Interval Scheduling for Wireless Systems
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Solution Overview
Problem
Wireless communication systems face inefficiencies in data transmission due to varying channel conditions and data rates, leading to suboptimal transmission time intervals that affect throughput and interference, particularly in multi-user environments.
Innovation Solution
A method and system that dynamically measure channel conditions and data rates to schedule either short or long transmission time intervals for wireless devices, optimizing bandwidth allocation and interlacing structures to accommodate different user needs based on channel quality and data rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed transmission time interval is used for all users, then system complexity is reduced, but throughput and communication efficiency deteriorate due to inability to adapt to varying channel conditions
Solution Approach 1:
The patent implements dynamic transmission time interval adjustment where the TTI length is adapted based on channel conditions and data rate requirements. The system transitions from fixed TTI to variable TTI, allowing short TTI for high data rate users and long TTI for low data rate users, thereby optimizing throughput while managing complexity through condition-based scheduling rules
Solution Approach 2:
The patent changes the transmission time interval parameter dynamically based on communication conditions. By adjusting the TTI parameter (short or long) according to channel quality and data rate requirements, the system optimizes throughput for different user scenarios without requiring completely complex adaptive algorithms
2Productivity
If short transmission time interval is used for all users, then peak throughput is improved, but interference increases and resource utilization deteriorates for users with poor channel conditions
Solution Approach 1:
The patent applies different transmission time interval qualities to different users based on their local channel conditions. High data rate users with good channel conditions receive short TTI for peak throughput, while low data rate users with poor channel conditions receive long TTI to reduce interference and improve resource utilization, achieving localized optimization
3Object-affected harmful factors
If long transmission time interval is used for all users, then interference is reduced, but peak throughput and communication efficiency deteriorate for users with good channel conditions
Solution Approach 1:
The system dynamically selects between long and short TTI based on real-time channel conditions and data rate requirements. This dynamic selection allows the system to use long TTI for interference reduction when appropriate while switching to short TTI for peak throughput optimization when channel conditions permit, resolving the contradiction between interference reduction and throughput maximization
4Productivity
If varied transmission time intervals are implemented, then resource utilization is improved, but device complexity and scheduling overhead increase
Solution Approach 1:
The patent implements varied TTI by changing the time interval parameter based on measurable communication parameters such as data rate and channel conditions. This approach improves resource utilization through parameter adaptation while controlling complexity by using straightforward measurement-based scheduling rules rather than complex optimization algorithms
Data Source
AI summary
Embodiments describe a varied transmission time interval in wireless communication system. According to some embodiments is a method for assigning a transmission time interval. The method can include measuring a channel condition and/or a data rate of packet communicated by at least one wireless device. Based in part on the data rate and/or channel condition information, a determination can be made whether to schedule a long transmission time interval or a short transmission time interval to the packet. A long transmission time interval can be scheduled if the channel condition is poor and/or there is a low data rate. A short transmission time interval can be scheduled if the channel condition is good and/or the data rate is high or fast. The method can be repeated for multiple wireless devices. Also included is an alternative interlacing structure that supports both long transmission time intervals and short transmission time intervals.