Small Data Transmission Control in Inactive Terminal Devices
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Solution Overview
Problem
In telecommunications, terminal devices in an inactive state face unnecessary power consumption and signaling overhead due to frequent connection setups and releases for small and infrequent data transmissions, which is not efficiently managed until 3GPP Release 17 introduced SDT based on RACH and pre-configured PUSCH resources.
Innovation Solution
A method and device for controlling Small Data Transmission (SDT) in terminal devices by determining whether uplink data should be transmitted in an inactive state, resuming radio bearers, and transmitting data based on specific characteristics and configurations, including access categories, QoS parameters, and data radio bearers, while supporting subsequent transmissions and managing resource configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal device resumes connection for data transmission in inactive state, then data transmission capability is improved, but power consumption and signaling overhead increase
Solution Approach 1:
The network device performs preliminary actions by configuring SDT parameters and pre-establishing PUSCH resources before the terminal needs to transmit data. The terminal device determines traffic characteristics in advance and prepares resume conditions, avoiding full connection setup when data transmission is needed, thus reducing power consumption while maintaining transmission capability.
2Reliability
If connection is setup for each data transmission, then data transmission reliability is improved, but signaling overhead increases
Solution Approach 1:
The invention segments the connection management process into two parts: maintaining a simplified inactive state for most periods, and only establishing full connection when necessary based on traffic characteristics. The network device segments the data transmission process into small data packets that can be sent via pre-configured PUSCH resources without requiring full connection setup, reducing signaling overhead while maintaining transmission reliability.
Solution Approach 2:
The system changes the state parameters of the terminal device between inactive and active based on traffic characteristics. When data transmission is detected, the terminal transitions to a partial active state for SDT, resuming only necessary radio bearers rather than full connection, thus reducing signaling overhead while ensuring reliable data transmission.
3Productivity
If radio bearers are resumed for SDT, then data transmission efficiency is improved, but network resource management complexity increases
Solution Approach 1:
The network device uses feedback mechanisms to monitor terminal device status and traffic characteristics. Based on this feedback, the network dynamically adjusts resource allocation and SDT parameter configuration, optimizing the balance between transmission efficiency and management complexity. The terminal device also provides feedback on traffic patterns to enable intelligent resume decisions.
Data Source
AI summary
Embodiments of the present disclosure relate to methods, devices and computer readable media of communication. A method of communication implemented by a terminal device comprises determining, based on characteristics of traffic associated with uplink data, whether the uplink data is to be transmitted in an inactive state of the terminal device; and in accordance with a determination that the uplink data is to be transmitted in the inactive state, resuming radio bearers for the transmission of the uplink data in the inactive state; and transmitting, based on the radio bearers, the uplink data to the network device while the terminal device is in the inactive state. The method of communication implemented by a network device comprises receiving the uplink data; and transmitting, to the terminal device, a response to the reception of the uplink data. In this way, control scheme for small data transmission is provided.