Uplink Grant Selection Rule for Terminal Data Transmission
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Solution Overview
Problem
Terminal devices face challenges in transmitting multiple uplink channels simultaneously due to limited uplink power and conflicting grants, leading to potential data loss and inefficiencies in MAC PDU transmission.
Innovation Solution
The method involves determining a second uplink grant for transmitting a data packet based on a selection rule when the initial uplink transmission is given up, allowing for efficient re-routing of data packets and minimizing data loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal device transmits multiple uplink channels simultaneously, then the uplink transmission efficiency is improved, but the uplink power limitation causes transmission failures and data loss
Solution Approach 1:
The patent changes the parameter of grant selection by introducing a selection rule that considers both priority and time domain resources. Instead of simply selecting the highest priority grant, the system dynamically adjusts grant selection based on power availability and resource timing, transforming the transmission strategy to balance efficiency and reliability under power constraints.
2Reliability
If the terminal device selects higher-priority uplink grants for transmission, then the important data is transmitted reliably, but lower-priority grants are discarded causing data loss
Solution Approach 1:
The patent applies preliminary action by determining the second uplink grant in advance before actual transmission occurs. The selection rule pre-identifies alternative grants based on time domain resource overlap analysis, so when power limitations occur, the terminal device can immediately switch to the pre-determined alternative without data loss.
Solution Approach 2:
The selection rule acts as an intermediary mechanism between priority-based grant selection and actual transmission. It mediates the conflict by introducing time domain resource overlap consideration, allowing the system to balance priority requirements with power availability, thus preventing both data loss and ensuring reliable transmission.
3Ease of operation
If the terminal device determines uplink grants based on priority only, then the decision process is simple, but conflicting grants in time domain cause transmission conflicts
Solution Approach 1:
The patent introduces dynamics into the grant selection process by making the selection rule adaptive rather than static. The rule dynamically evaluates time domain resource overlap and adjusts grant selection accordingly, allowing the system to handle conflicting grants flexibly while maintaining operational simplicity through automated decision-making.
Data Source
AI summary
A method for data transmission, a data reception method, and a device are provided. The method includes: in a case that a first data packet has been generated based on a first uplink grant and uplink transmission corresponding to the first uplink grant is given up, determining, according to a selection rule, a second uplink grant for transmitting the first data packet. In the method of the embodiments of this disclosure, the terminal device can autonomously select an uplink grant for transmitting a data packet corresponding to a discarded uplink grant, thereby avoiding data loss.