Grant-Free Data Transmission Control via Time-Frequency Repetition
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Solution Overview
Problem
Existing data transmission technologies face inefficiencies in controlling time-frequency repetition in grant-free data transmissions, leading to interference and reduced decoding success rates due to unmanaged collisions and variable traffic loads.
Innovation Solution
An apparatus and method that determine an interference level in time-frequency resource pools, using control information to manage the use of time-frequency repetition in grant-free data transmissions, allowing or restricting its use based on interference levels and probability parameters, thereby optimizing transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If time-frequency repetition is used in grant-free data transmissions, then transmission reliability is improved, but interference level increases
Solution Approach 1:
The patent implements dynamic control of time-frequency repetition by adjusting the repetition parameter based on current interference conditions. The base station monitors interference levels and dynamically modifies the repetition parameter in control information, allowing the system to adapt between using repetition (when interference is low) and avoiding repetition (when interference is high), thus resolving the contradiction between reliability improvement and interference generation.
Solution Approach 2:
The patent changes the repetition parameter as a controllable variable that directly affects both decoding success rate and interference level. By modifying this parameter based on traffic load and interference conditions, the system can optimize the balance between these two opposing factors - increasing repetition for reliability when needed, and decreasing it to reduce interference when appropriate.
2Productivity
If time-frequency repetition is used in grant-free data transmissions, then transmission efficiency is improved under low interference, but resource utilization deteriorates under high interference
Solution Approach 1:
The system dynamically adjusts the repetition parameter based on real-time interference conditions and traffic load. When interference is low, repetition is enabled to improve transmission efficiency. When interference becomes high, the parameter is reduced or disabled, preventing resource waste and maintaining efficient resource utilization. This dynamic adaptation resolves the contradiction between efficiency improvement and resource utilization deterioration.
3Speed
If grant-free data transmission is used, then transmission speed is improved, but control precision deteriorates due to unmanaged collisions
Solution Approach 1:
The patent implements a feedback mechanism where the base station monitors interference levels and collision patterns in grant-free transmissions, then sends control information back to user equipment adjusting the repetition parameter. This closed-loop control allows the system to maintain high transmission speed while improving control precision by dynamically managing repetitions based on actual collision conditions and interference levels.
Data Source
AI summary
An apparatus comprising: at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to perform: receiving at least one signal comprising control information; determining data to transmit using grant-free data transmission; determining whether grant-free data transmission using time-frequency repetition is permitted for the grant-free data transmission in dependence on the received control information; if it is determined that use of time-frequency repetition for the grant-free data transmission is permitted, causing transmission of grant-free data transmission using time-frequency repetition; and if it is determined that use of time-frequency repetition for the grant-free data transmission is not permitted, causing transmission of grant-free data transmission without using time-frequency repetition.