Continuous Scheduling Resource Allocation for Variable TTI Lengths
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Solution Overview
Problem
The existing LTE system's persistent scheduling scheme is not applicable when the Transmission Time Interval (TTI) length is variable, as available resources and resource unit sizes differ, and there is no solution for persistent scheduling in frame structures with variable TTI lengths, which is a challenge for the 5G mobile communication system requiring low latency and high reliability.
Innovation Solution
A network side device allocates a list of resource allocation for persistent scheduling, mapping relationships between periodic scheduling resources and TTI lengths or channel conditions, which is then transmitted to a terminal, allowing data transmission over determined resources even with variable TTI lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If persistent scheduling is used with fixed TTI length, then resource allocation efficiency is improved, but adaptability to variable TTI lengths deteriorates
Solution Approach 1:
The patent applies dynamics by transitioning from fixed TTI length scheduling to variable TTI length scheduling. The network side device dynamically determines TTI lengths based on actual transmission needs and allocates resources accordingly, allowing the system to adapt to different service requirements while maintaining persistent scheduling efficiency.
Solution Approach 2:
The patent changes the parameter of TTI length from fixed to variable. By allowing TTI length to be dynamically adjusted based on service type, data size, and channel conditions, the system maintains resource allocation efficiency while gaining adaptability to different transmission scenarios.
2Device complexity
If fixed resource units are used for persistent scheduling, then scheduling simplicity is improved, but flexibility in resource allocation deteriorates
Solution Approach 1:
The patent segments the resource allocation process into two parts: a simplified persistent scheduling framework that maintains simplicity, and a flexible resource determination mechanism that adapts to different scenarios. The network side device segments resource allocation based on variable TTI lengths and channel conditions while maintaining overall scheduling simplicity.
Solution Approach 2:
The patent introduces dynamics to resource allocation by allowing the network side device to dynamically determine resource units based on actual transmission needs. This maintains scheduling simplicity through automated resource determination while providing flexibility for different service requirements.
3Speed
If persistent scheduling is applied without considering channel conditions, then scheduling speed is improved, but transmission reliability deteriorates
Solution Approach 1:
The patent incorporates feedback by having the network side device determine resource units based on both persistent scheduling information and current channel conditions. This feedback mechanism ensures that scheduling decisions consider actual transmission quality, improving reliability while maintaining scheduling speed through automated resource determination.
Data Source
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AI summary
Disclosed in the present invention are a method and a device for allocating a continuous scheduling resource and transmitting data using the continuous scheduling resource, comprising: generating a continuous scheduling resource allocation table for a terminal, wherein the continuous scheduling resource allocation table includes mapping relationships between each continuous scheduling resource and a transmission time interval length and/or a channel condition; sending the continuous scheduling resource allocation table to the terminal. When transmitting data by using continuous scheduling resources, determining the continuous scheduling resource allocation table; after the transmission time interval length and/or channel condition at the time of transmission is determined, determining the continuous scheduling resource according to the mapping relationships in the continuous scheduling resource allocation table; transmitting data using the continuous scheduling resource. Using the present scheme, even if the transmission time interval varies, the continuous scheduling resources can still be used for data transmission, thus achieving effective allocation of continuous scheduling resources under variable transmission time interval lengths.