Base Station Dynamic Grant-Free Parameter Control for URLLC
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Solution Overview
Problem
In wireless communication systems, the interference between eMBB and URLLC data in uplink transmission dynamically changes, leading to suboptimal parameter settings for URLLC transmission, which reduces transmission efficiency in environments with dynamic resource sharing.
Innovation Solution
A base station apparatus dynamically controls grant-free transmission parameter information for URLLC data by notifying it through a control channel, allowing the communication apparatus to update parameters based on interference from eMBB data, thereby improving overall system efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If grant-free transmission is used for URLLC to reduce delay, then transmission speed is improved, but transmission efficiency deteriorates due to dynamic interference from eMBB data
Solution Approach 1:
The patent applies dynamics by making the grant-free transmission parameters adjustable and controllable in real-time. The base station dynamically controls parameter information (such as modulation and coding schemes, resource allocation) for grant-free transmission based on current interference conditions from eMBB data, allowing the system to adapt to changing transmission environments and optimize both speed and efficiency.
2Reliability
If frequency resources are maintained for URLLC data transmission, then reliability is improved, but resource use efficiency deteriorates when URLLC transmission frequency is low
Solution Approach 1:
The patent implements dynamic resource allocation where the base station adjusts parameter information for grant-free transmission based on actual transmission needs and interference conditions. This allows frequency resources to be maintained for URLLC when needed (ensuring reliability) while allowing other uses when URLLC transmission frequency is low (improving resource efficiency).
Solution Approach 2:
The patent changes transmission parameters dynamically by having the base station notify updated parameter information for grant-free transmission to the communication apparatus. These parameter changes include modulation schemes, coding rates, and resource allocations that adapt to current system conditions, optimizing both reliability and resource efficiency.
3Device complexity
If parameter information for grant-free transmission is not dynamically controlled, then device complexity is reduced, but transmission efficiency deteriorates due to suboptimal parameter settings
Solution Approach 1:
The patent implements a feedback mechanism where the base station monitors interference conditions from eMBB data and dynamically adjusts parameter information for grant-free URLLC transmission accordingly. This feedback loop allows the system to maintain optimal transmission efficiency without requiring complex terminal-side decision-making, as the base station centralizes the control intelligence.
Data Source
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AI summary
[Object] To provide a mechanism that can improve the transmission efficiency of the entire system in an environment in which dynamic resource sharing is performed. [Solving Means] Provided is a communication apparatus that communicates with a base station apparatus that receives first uplink data of grant-free transmission and second uplink data of grant-based transmission, the communication apparatus including: a setting unit that performs setting regarding grant-free transmission available resources based on setting information received from the base station apparatus; and a communication processing unit that receives, in a predetermined first slot, a downlink control channel including parameter information for grant-free transmission and that uses uplink resources selected from the grant-free transmission available resources to transmit the first uplink data generated based on the parameter information.