Small Data Transmission Indicator in Core Network Gateway
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Solution Overview
Problem
Current mobile communication networks face challenges in handling small data transmission for machine-type communication (MTC) devices, particularly in determining eligibility for small data transmission, recognizing small data payload, and managing bi-directional transmission scenarios, due to ambiguities in existing technologies.
Innovation Solution
A method is introduced to handle small data transmission by including a small data transmission indicator in trigger request messages, supporting network capabilities through system information broadcast, and applying small data payload via NAS signaling messages, allowing for efficient control plane operations without establishing a default EPS bearer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional mobile communication protocols are used for MTC devices, then network coverage and basic connectivity are ensured, but network resources are wasted due to establishment of default EPS bearers for small data transmissions
Solution Approach 1:
The patent changes the transmission medium parameter by routing small data transmissions through the control plane (NAS signaling) instead of the user plane (EPS bearer), thereby optimizing network resource usage for MTC devices while maintaining connectivity
2Adaptability or versatility
If existing trigger request message formats are used, then compatibility with current networks is maintained, but small data transmission capability is not supported due to lack of identification mechanisms
Solution Approach 1:
The patent embeds a small data indicator field within the existing trigger request message structure, allowing small data transmission capability to be added without replacing the entire message format, thus maintaining compatibility while enabling new functionality
Solution Approach 2:
The patent separates the trigger request message into functional components, adding a distinct indicator field that identifies small data transmission requirements, allowing the network to process different message types through different pathways
3Reliability
If detached MTC devices establish default EPS bearers for small data transmission, then data delivery is ensured, but network congestion worsens due to unnecessary connection establishment
Solution Approach 1:
The patent introduces the small data indicator as an intermediary element that enables the network to distinguish between regular and small data transmissions, routing the latter through control plane signaling to avoid establishing full EPS bearers while ensuring reliable delivery
Data Source
AI summary
A method of handling small data transmission for a core network is disclosed, wherein the core network comprises a data base, a network gateway node and a network control node. The method comprises the network gateway node receiving a service request message from a machine-type communication (MTC) server, wherein information of the service request message is eligible for the small data transmission between a mobile device and the network gateway node; and the network gateway node including a small data transmission indicator in the service request message, wherein the small data transmission indicator indicates the small data transmission.