SDT Bearer Handling for Mixed MT-SDT and MO-SDT Traffic
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Solution Overview
Problem
Existing technologies do not effectively manage the handling of different radio bearers during Mobile Terminated Small Data Transmission (MT-SDT) procedures, leading to potential overloading and inefficient data transmission when Mobile Oriented SDT (MO-SDT) and MT-SDT data with varying quality of service requirements are mixed.
Innovation Solution
A mechanism is proposed where the terminal device indicates the availability of data not belonging to MT-SDT bearers or resumes non-MT-SDT bearers during ongoing MT-SDT procedures, allowing separate handling of MO-SDT and MT-SDT bearers based on network configuration and resource availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If data from both MT-SDT and non-MT-SDT bearers are handled during MT-SDT procedure, then data transmission completeness is improved, but bearer management complexity increases
Solution Approach 1:
The patent segments bearer management into distinct procedures: MT-SDT procedure for mobile-terminated small data and MO-SDT procedure for mobile-originated small data. Each procedure handles specific bearer types separately, avoiding mixed handling. The terminal device determines data type and initiates appropriate procedure, while network device configures separate uplink data indication mechanisms for each bearer type, simplifying management while ensuring complete data transmission.
2Productivity
If separate handling of MO-SDT and MT-SDT bearers is implemented, then transmission efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent implements a universal uplink data indication mechanism that serves both MT-SDT and MO-SDT procedures. The terminal device uses a unified determination process to identify data type and selects appropriate procedure accordingly. The network device configures a single uplink data indication mechanism that handles both bearer types, reducing signaling overhead while maintaining separate handling benefits for transmission efficiency.
3Device complexity
If all data is transmitted after MT-SDT procedure completion, then bearer management simplicity is maintained, but transmission delay increases
Solution Approach 1:
The patent enables preliminary data transmission during the MT-SDT procedure itself. When the terminal device determines that uplink data belongs to non-MT-SDT bearers, it can transmit this data immediately using the MO-SDT procedure rather than waiting for MT-SDT completion. This preliminary action reduces transmission delay while the clear determination mechanism maintains bearer management simplicity.
Data Source
AI summary
Embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable storage media of bearer handling during Mobile Terminated Small Data Transmission (MT-SDT). The method comprises determining that data not belonging to MT-SDT bearer is available during an MT-SDT procedure or data belonging to a MT-SDT bearer is available during a Mobile Oriented Small Data Transmission (MO-SDT) procedure; and based on the determining, perform at least one of: transmitting an indication of presence of the data to a network device, or resuming the non-MT-SDT bearer during the MT-SDT procedure or the MT-SDT bearer during the MO-SDT procedure, or transmitting data not belonging to MT-SDT bearer after the MT-SDT procedure is completed or data belonging to MT-SDT bearer after the MO-SDT procedure is completed.