Non-SDT Data Arrival Control During SDT Procedures
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Solution Overview
Problem
Non-Small Data Transmission (SDT) data cannot be transmitted during an ongoing SDT procedure due to unconfigured radio bearers, leading to potential delays and failures in network communication.
Innovation Solution
A terminal device transmits an indication of non-SDT data availability during the SDT procedure and monitors for a response from the network device. If no response is received, it enters an idle or inactive state or initiates a connection setup/request to ensure timely data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal device transmits non-SDT data during an ongoing SDT procedure, then data transmission can proceed without mode transition, but the unconfigured radio bearers cause transmission failures and delays
Solution Approach 1:
The terminal device transmits an indication message in advance to notify the network device of non-SDT data availability before actual data transmission. This preliminary notification allows the network device to prepare appropriate response actions, preventing transmission failures that would occur if the terminal attempted to send data through unconfigured radio bearers.
Solution Approach 2:
The terminal device monitors for a response message from the network device after transmitting the indication. Based on whether the response is received within a predetermined time, the terminal adjusts its behavior - either proceeding with data transmission or falling back to connected mode. This feedback mechanism ensures reliable data transmission by adapting to the network device's actual readiness.
2Reliability
If the terminal device waits for network device response before transmitting non-SDT data, then transmission reliability improves, but transmission delay increases
Solution Approach 1:
The terminal device sends the indication message beforehand, allowing the network device to prepare the appropriate response (such as configuring radio bearers or indicating SDT procedure termination). This preliminary action reduces the waiting time during actual data transmission while maintaining reliability through the predetermined time monitoring mechanism.
Solution Approach 2:
The terminal device dynamically adjusts its transmission strategy based on whether a response is received within the predetermined time. If the response is received, the terminal proceeds with data transmission using the updated configuration; if not, it falls back to connected mode. This dynamic adaptation optimizes the balance between reliability and delay.
3Reliability
If the terminal device continuously monitors for network device response, then transmission reliability is maintained, but signaling overhead and processing complexity increase
Solution Approach 1:
The terminal device monitors for the response message only for a predetermined time period rather than continuously until data transmission is complete. This partial monitoring approach maintains reliability by detecting whether the network device intends to respond, while avoiding the excessive complexity and resource consumption of continuous monitoring throughout the entire data transmission process.
Data Source
AI summary
Embodiments of the present disclosure relate to devices, methods, apparatuses and computer-readable storage medium for controlling DCCH based non-Small Data Transmission (SDT) data arrival. In some example embodiments, a terminal device transmits an indication an availability of non-Small Data Transmission (SDT) data to a network device during a SDT procedure. The terminal device monitors for a response to the indication, and performs an action comprising in response to absence of the response to the indication of the non-SDT data. The action comprises: entering an idle or inactive state and/or initiating a connection setup or resume request to the network device.