Dynamic TDD Resource Allocation for Flexible Wireless Systems
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Solution Overview
Problem
Existing wireless communication systems lack a solution for dynamically allocating uplink and downlink resources to support varying traffic demands and diverse services, such as eMBB, URLLC, and mMTC, in a flexible and efficient manner.
Innovation Solution
Each UE is configured with a specific time unit structure, allowing for varying start positions and different numbers and lengths of uplink and downlink regions, enabling flexible resource division through configuration signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed TDD frame structure is used with fixed uplink-downlink allocation, then system complexity is reduced and ease of operation is improved, but adaptability to varying traffic demands and diverse services deteriorates
Solution Approach 1:
The patent implements dynamic TDD frame structure where the uplink-downlink configuration can be changed over time. The base station determines different uplink-downlink configurations for different subframes based on traffic conditions, allowing the system to adapt from fixed to dynamic operation mode as needed
Solution Approach 2:
The patent changes the parameter of TDD configuration by introducing multiple uplink-downlink configurations (Configuration 0-6) that can be selectively applied. The base station can switch between different configurations dynamically based on traffic demands, changing the temporal allocation parameters of uplink and downlink resources
2Productivity
If fixed special subframe configuration is broadcasted to all UEs, then system operation is simplified, but resource utilization efficiency deteriorates when UEs have different traffic patterns
Solution Approach 1:
The patent applies local quality by configuring different uplink-downlink configurations for different UEs based on their individual traffic patterns and service requirements. Instead of a uniform configuration for all UEs, each UE can have optimized local resource allocation matching its specific needs
Solution Approach 2:
The patent segments the cell's UEs into different groups or individuals with different uplink-downlink configurations. The base station can allocate different TDD configurations to different UEs or UE groups, allowing segmented resource allocation that optimizes for each user's traffic characteristics
3Adaptability or versatility
If guard period is fixed in length and position, then system complexity is reduced, but flexibility in supporting diverse services with different latency requirements deteriorates
Solution Approach 1:
The patent makes the guard period dynamic by allowing its length and position to vary based on the selected uplink-downlink configuration. Different configurations (0-6) have different guard period arrangements, enabling the system to adapt guard period parameters dynamically to support services with different latency and switching requirements
Data Source
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AI summary
Disclosed in the present application are a data transmission method and device, solving the problem of using a dynamic uplink-downlink resource division manner for data transmission in a new wireless communication system. The method comprises: a terminal determining the start position of a time unit of the terminal, and determining the division of an uplink region and a downlink region in the time unit; the terminal detecting a downlink control channel in the downlink region of the time unit; and according to the detection result, the terminal performing an uplink transmission in the uplink region corresponding to the downlink region. As a terminal uses a time unit specific to the terminal for transmission, time units of different terminals may have different start positions, and the number and lengths of the uplink regions and/or downlink regions included in the time units of different terminals may also be different. Thus, the invention can support flexible and variable resource division.