MTC Server Dynamic Connection Management for Signaling Load Reduction
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Solution Overview
Problem
Machine Type Communication (MTC) systems face challenges in managing the signaling and data traffic in cellular access networks due to the varying mobility and connectivity of MTC devices, which can lead to inefficiencies in data transmission and energy consumption, particularly for devices in dormant states.
Innovation Solution
A server is designed to manage MTC devices by determining their connectivity status and triggering them to initiate IP connections when necessary, using dedicated channels for communication and maintaining lists to classify devices as stationary or mobile, allowing for efficient data transmission and energy management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If MTC devices maintain continuous IP connections to enable immediate data transmission, then data transmission speed is improved, but energy consumption increases and signaling load increases
Solution Approach 1:
The patent implements dynamic connection management where MTC devices can switch between connected and disconnected states based on communication needs. The server maintains device profiles with connectivity status and can trigger devices to connect only when data transmission is required, rather than maintaining continuous connections. This dynamic state transition resolves the contradiction by providing fast data transmission when needed while conserving energy during idle periods.
Solution Approach 2:
The server performs preliminary actions by maintaining device profiles that include connectivity status, device type (mobile/stationary), and application information before actual data transmission occurs. This allows the server to prepare triggering messages and determine optimal connection strategies in advance, enabling rapid data transmission when devices connect while avoiding unnecessary continuous connection maintenance.
2Speed
If MTC devices in dormant states are immediately activated for data transmission, then data transmission speed is improved, but signaling load increases
Solution Approach 1:
The server maintains device profiles with connectivity status, device type, and application information in advance. When data transmission is needed, the server checks the profile and prepares triggering messages beforehand, reducing the signaling required at activation moment. This preliminary preparation minimizes signaling load while enabling fast data transmission.
Solution Approach 2:
The server acts as an intermediary between the network and dormant MTC devices. It maintains a repository of device profiles and uses these to intelligently trigger devices only when necessary. This intermediary role reduces signaling load by filtering and managing activation requests, rather than immediately activating all dormant devices upon any network event.
3Productivity
If the server triggers all MTC devices to initiate IP connections regardless of device type, then data transmission capability is improved, but energy consumption increases for stationary devices
Solution Approach 1:
The patent applies different connection strategies to different device types based on their characteristics. Mobile MTC devices are triggered to initiate IP connections when needed, while stationary MTC devices use alternative activation methods or remain in dormant state longer. This localized quality approach matches the triggering mechanism to the specific device type, improving data transmission capability when needed while conserving energy for stationary devices that don't require frequent activation.
4Productivity
If the server maintains detailed information about all MTC devices including connectivity status and device type, then communication efficiency is improved, but device complexity increases
Solution Approach 1:
The server maintains simplified device profiles that contain essential information (connectivity status, device type, application info) as data structures rather than complex device models. These profiles are lightweight copies of device characteristics that enable efficient decision-making for triggering without requiring complex device management logic. This copying approach improves communication efficiency while keeping server complexity manageable.
Data Source
AI summary
A server for controlling user MTC devices. The server ascertains if a user MTC device has an IP connection to a cellular access network, and if so, sends a message to trigger the user MTC device to initiate an application defined in the message. If a user MTC device does not have an IP connection, the server ascertains if the user MTC device is a mobile or a stationary user MTC device, and for a stationary user MTC device, the server sends a message to the cellular access network to trigger the user MTC device to initiate an IP connection, and for a mobile user MTC device, waits until the user MTC device has an IP connection, and for both kinds of user MTC devices, when the user MTC device has an IP connection, transmits a message to the user MTC device to initiate an application defined in the message.