Dynamic Uplink Grant Adjustment for Wireless Reliability
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Solution Overview
Problem
Current logical channel prioritization in communication networks results in fixed uplink grants, leading to decreased spectral efficiency and increased packet loss rates when network channel conditions change, reducing data transmission reliability.
Innovation Solution
A method where a terminal dynamically changes the uplink grant usable by a logical channel upon satisfying a change trigger event, such as high packet loss rates or transmission delays, by adjusting parameters like subcarrier spacing or cell selection, based on configuration information sent by a network-side device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network side configures uplink grant statically through RRC message, then the configuration is simple and stable, but the uplink grant cannot adapt to changing network channel conditions, causing spectral efficiency to decrease and packet loss rate to increase
Solution Approach 1:
The patent transforms the static uplink grant configuration into a dynamic system by introducing MAC CE commands that can modify the uplink grant in real-time based on network channel conditions. The terminal device receives dynamic adjustment instructions from the network side through MAC layer signaling, enabling the uplink grant to adapt to changing channel characteristics while maintaining configuration simplicity through standardized procedures.
Solution Approach 2:
The patent enables dynamic modification of uplink grant parameters (such as frequency resources, time resources, power allocation) through MAC CE commands. When network channel conditions change, the network side can adjust these parameters dynamically without requiring full RRC reconfiguration, thus improving adaptability while maintaining transmission reliability through controlled parameter evolution.
2Productivity
If the uplink grant is fixed for a logical channel, then the configuration process is simplified, but spectral efficiency decreases when network conditions change
Solution Approach 1:
The patent introduces dynamic uplink grant adjustment through MAC CE signaling, allowing the system to transition from static to dynamic configuration based on channel conditions. This enables spectral efficiency to be optimized in real-time without requiring complex reconfiguration procedures, as the MAC layer provides a lightweight mechanism for grant modification compared to full RRC reconfiguration.
Solution Approach 2:
The patent implements a feedback mechanism where the network side monitors channel conditions and sends MAC CE commands to adjust uplink grants accordingly. This closed-loop approach allows spectral efficiency to be continuously optimized based on actual channel state, while the automation of the feedback process prevents significant increases in operational complexity.
3Reliability
If static logical channel prioritization restriction is used, then configuration is straightforward, but packet loss rate increases when channel conditions deteriorate
Solution Approach 1:
The patent enables dynamic adjustment of logical channel prioritization restrictions through MAC CE commands, allowing the system to adapt priority allocations based on channel conditions. When conditions deteriorate, high-priority traffic can be dynamically boosted without manual reconfiguration, reducing packet loss while maintaining straightforward initial configuration through standard RRC procedures.
Data Source
AI summary
The present disclosure provides a method for changing an uplink grant, a method for sending information, and a communications apparatus. The method for changing an uplink grant includes: in a case that a logical channel satisfies a change trigger event, changing an uplink grant usable by the logical channel.