Grant-Free Uplink Transmission Parameter Configuration
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Solution Overview
Problem
In the New Radio (NR) system, the flexible air interface transmission parameters make it challenging for base stations to correctly receive uplink data due to the conventional grant-free transmission method's inability to ensure consistent decoding.
Innovation Solution
The method involves determining a target grant-free transmission area and corresponding air interface transmission parameters based on configuration information, allowing the terminal device to send uplink data using specified parameters, ensuring the base station can correctly receive the data by matching the service features, data size, buffer status, or channel state information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If grant-free transmission method is used, then network latency and signaling overheads are reduced, but base station cannot correctly receive data in NR system
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting air interface transmission parameters (such as modulation and coding schemes, resource allocation) based on channel conditions and service requirements. This allows the system to maintain reliable data reception while using grant-free transmission, resolving the contradiction between reduced latency and maintained reception accuracy.
Solution Approach 2:
The patent implements preliminary action by pre-configuring transmission parameters and resources for grant-free uplink transmission. The base station pre-allocates resources and sets up transmission parameters before actual data transmission occurs, enabling terminals to immediately send data without requesting grants, thus reducing latency while ensuring the base station can correctly receive and decode the data.
2Adaptability or versatility
If flexible air interface transmission parameters are used, then system adaptability is improved, but decoding consistency cannot be ensured
Solution Approach 1:
The patent utilizes parameter changes by dynamically adjusting air interface transmission parameters based on channel conditions, service types, and terminal capabilities. This allows the system to adapt to different scenarios while maintaining decoding consistency through coordinated parameter selection at both base station and terminal.
Solution Approach 2:
The patent implements feedback mechanisms where transmission parameters are adjusted based on channel state information and reception outcomes. This feedback loop ensures that flexible parameter selection does not compromise decoding consistency, as parameters are continuously optimized based on actual transmission conditions and receiver performance.
Data Source
AI summary
Embodiments of the present disclosure relate to a grant-free uplink transmission method and apparatus. The method includes: determining, based on received configuration information, a target grant-free transmission area and a target air interface transmission parameter corresponding to the target grant-free transmission area, where the target grant-free transmission area is an air interface time-frequency resource formed by using a specified time range and frequency range, and the configuration information includes at least one grant-free transmission area and an air interface transmission parameter corresponding to each grant-free transmission area; and sending uplink data to a base station based on the target grant-free transmission area and the target air interface transmission parameter. In this application, it can be provided that the base station can correctly receive the uplink data.