Uplink Data Indication in Small Data Transmission
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Solution Overview
Problem
In communication systems, there is a challenge in efficiently processing uplink data, particularly in identifying whether a non-small data transmission data radio bearer (DRB) on a terminal device carries data to be sent, which can lead to data loss and increased sending delays due to inadequate indication mechanisms.
Innovation Solution
The method involves sending first indication information from a terminal device to a network device during a small data transmission (SDT) process, indicating whether a non-small data transmission DRB carries uplink data, allowing the network device to timely acquire this information and manage data transmission effectively, thereby avoiding data loss and reducing delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device sends indication information about non-SDT DRB uplink data during SDT process, then the network device can timely acquire this information and manage data transmission effectively, but the complexity of the indication mechanism increases
Solution Approach 1:
The patent combines the indication of non-SDT DRB uplink data with the existing SDT indication mechanism by using a unified indication field in the SDT indication message. This merging approach allows the network device to obtain both SDT status and non-SDT DRB data status through a single indication mechanism, improving reliability while avoiding the need for separate complex indication procedures.
Solution Approach 2:
The indication message is designed to serve multiple functions: it indicates whether the terminal is performing SDT, whether non-SDT DRBs have uplink data, and triggers appropriate network actions. This multi-functionality reduces the need for multiple separate indication mechanisms, thereby improving reliability without proportionally increasing complexity.
2Reliability
If the network device waits for indication information before processing non-SDT DRB uplink data, then data loss is avoided, but sending delays increase
Solution Approach 1:
The terminal device proactively sends indication information about non-SDT DRB uplink data during the SDT process before the network device would otherwise need to request or detect this information. This preliminary action allows the network device to prepare for timely data transmission without waiting, thus preventing data loss while minimizing delays.
Solution Approach 2:
The indication mechanism establishes a feedback loop where the terminal informs the network about its data status, enabling the network to make informed transmission decisions. This feedback allows the network to act promptly upon receiving the indication, balancing reliable data transmission with minimized delay.
3Reliability
If the terminal device continuously monitors and reports non-SDT DRB data status, then the network device can respond timely, but the signaling overhead and energy consumption increase
Solution Approach 1:
Instead of continuous monitoring and reporting, the terminal device reports non-SDT DRB data status periodically or event-triggered during the SDT process. This periodic action reduces energy consumption compared to continuous monitoring while still providing the network with timely information for effective data transmission management.
Solution Approach 2:
The patent extracts only the essential indication information about non-SDT DRB uplink data status during the SDT process, rather than reporting all possible data status details continuously. This extraction approach reduces signaling overhead and energy consumption while maintaining sufficient information for reliable network management.
Data Source
AI summary
A method for processing uplink data includes sending first indication information to a network device during a small data transmission (SDT) process. The first indication information indicates whether a non small data transmission data radio bearer (non SDT DRB) on the terminal device carries uplink data to be sent