Small Data Transmission Control via Authorization Signalling
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Solution Overview
Problem
Current mobile radio communications networks lack effective control mechanisms for Small Data Transmission (SDT) services, leading to inefficiencies and potential network capacity and performance issues due to uncontrolled use of SDT features, particularly in Machine Type Communication (MTC) applications.
Innovation Solution
A mobile radio communications network and method that includes a first network device to receive SDT signalling, determine if the transmission should be prevented, and initiate a rejection message to control the mobile radio communications device, utilizing components like SGSN/MME and HSS for authentication and authorization, and MTC-IWF for interfacing with the Service Capability Server, to efficiently manage and restrict SDT service requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Small Data Transmission feature is enabled for MTC devices, then data transmission efficiency is improved, but network capacity and performance deteriorate due to uncontrolled use
Solution Approach 1:
The network device performs preliminary determination before allowing SDT transmission. The first network device determines whether the MTC device is authorized to use SDT by checking authorization information from the second network device, and prevents unauthorized devices from transmitting, thereby protecting network capacity before the transmission occurs.
Solution Approach 2:
The system implements feedback control where the first network device receives authorization status feedback from the second network device regarding the MTC device's SDT capability. Based on this feedback, the first network device either permits or prevents SDT transmission, dynamically adjusting network resource allocation.
2Ease of operation
If SDT service is allowed without control mechanisms, then ease of operation is improved, but network performance deteriorates due to abuse of the service
Solution Approach 1:
The first network device acts as an intermediary between the MTC device and the SDT service. It receives the MTC device's identification information, queries the second network device for authorization status, and based on the received authorization information, either permits or blocks the SDT service, thus mediating between ease of access and network performance protection.
3Reliability
If authorization checking is implemented for SDT, then network performance is protected, but device complexity increases due to additional signalling
Solution Approach 1:
The authorization determination function is extracted from the first network device and relocated to the second network device. The first network device only needs to forward identification information and receive authorization results, while the second network device performs the actual authorization check and returns the authorization information, thereby simplifying the first network device's complexity.
Data Source
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AI summary
The proposal, provides for a mobile radio communications network (88) within which a mobile radio communications device (90, 92) is to operate with access to a Small Data Transmission feature and including a first network device (94) arranged to receive Small Data Transmission signalling (100) initiated by the mobile radio communications device (90, 92), a second network device (96) arranged to receive signalling from the first network device (94) as part of an establishment procedure (102) for attempted Small Data Transmission communications for the mobile radio communications device (90, 92) within the network (88), the first network device (94) being further arranged to determine if Small Data Transmission should be prevented for the mobile radio communications device (90, 92) and responsive to its signalling exchange (102) with the second network device (96), and to initiate a Small Data Transmission rejection message (104) for use in the control of the mobile radio communications device (90, 92) if Small Data Transmission is to be prevented, and to a related method of network operation and network terminal/node devices.