Small Data Transmission via Suspended Bearer Resume
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in handling small data transmissions, particularly in scenarios where traditional random access procedures are cumbersome, leading to increased latency and resource utilization.
Innovation Solution
Implementing a mechanism for subsequent small data transmission (SDT) procedures that bypass conventional random access channels, allowing direct communication between a wireless device and a base station without anchor relocation, thereby optimizing resource usage and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional random access procedures are used for small data transmissions, then connection establishment is reliable, but latency increases and network resources are consumed
Solution Approach 1:
The patent segments the random access procedure into optional components. The wireless device can perform a simplified access procedure for small data transmissions by skipping certain steps (like sending a preamble or receiving a random access response) when conditions permit, while still maintaining reliable connection establishment when needed. This selective segmentation resolves the contradiction by allowing fast transmission when possible while preserving reliability when required.
Solution Approach 2:
The patent applies partial action by implementing an abbreviated random access procedure that performs only the necessary steps for small data transmissions. Instead of executing the complete random access sequence, the device performs a subset of actions (such as direct data transmission without full handshaking) when the data size and conditions warrant it, thereby reducing latency while maintaining sufficient reliability for small packets.
2Reliability
If conventional random access procedures are used for small data transmissions, then protocol compliance is maintained, but network resource utilization increases
Solution Approach 1:
The patent introduces dynamic adaptability where the random access procedure adjusts its completeness based on real-time conditions. The wireless device and network can dynamically select between full and abbreviated procedures depending on data size, channel conditions, and device state. This dynamic approach maintains protocol compliance through configurable parameters while optimizing resource utilization by selecting the minimal necessary actions for each transmission scenario.
Solution Approach 2:
The patent changes key parameters of the random access procedure based on transmission requirements. Parameters such as whether to transmit a preamble, whether to expect a random access response, and the size of data packets are adjusted according to the specific small data transmission context. These parameter changes enable protocol compliance through configurable options while reducing network resource consumption by disabling unnecessary procedural elements.
3Productivity
If abbreviated random access procedures are used, then latency is reduced and resources are conserved, but connection reliability may be compromised
Solution Approach 1:
The patent incorporates feedback mechanisms where the network monitors the success of abbreviated procedures and adjusts its behavior accordingly. When abbreviated procedures succeed, the system continues using them for efficiency. When failures occur, the network can trigger full random access procedures or adjust parameters to improve reliability. This feedback loop ensures that productivity gains from abbreviated procedures do not permanently compromise connection reliability.
Solution Approach 2:
The patent prepares contingency measures in advance by configuring both full and abbreviated procedures available. Before attempting an abbreviated procedure, the system has pre-configured fallback options ready. If the abbreviated procedure fails to establish a reliable connection, the device or network can immediately switch to the complete random access procedure, cushioning against reliability issues while maintaining the productivity benefits of the abbreviated approach when successful.
Data Source
AI summary
A wireless device receives, from a first base station, a RRC release message comprising a suspend configuration, wherein the suspend configuration comprises a configuration of a SDT procedure, and the configuration indicates a radio bearer configured for the SDT procedure. The wireless device suspends, based on the suspend configuration, one or more radio bearers comprising the radio bearer configured for the SDT procedure. Based on initiating the SDT procedure the wireless device resumes the radio bearer configured for the SDT procedure and transmits, to a second base station, a radio resource control (RRC) resume request message. The wireless device communicates with the second base station and during the SDT procedure, data associated with the SDT procedure, receives, from the second base station, a second RRC release message comprising a resume indication after completion of the SDT procedure, and initiates, based on the resume indication, an RRC resume procedure.