Network Element Request Reference Replacement for Satellite Registration Delays
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Solution Overview
Problem
Mobile terminal devices face registration failures in mobile communications networks due to long signal propagation delays, particularly in remote locations connected via satellite links, as request references expire before reply messages can be delivered, leading to repeated registration attempts and potential service failures.
Innovation Solution
A method and system where a network element between the base station and control unit stores and updates request references in reply messages, ensuring the mobile terminal device receives valid responses even with time delays, by replacing the original request references with the most recent ones, thus preventing registration failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complete mobile communications system is set up in remote locations, then coverage and service availability are improved, but costs and weight increase significantly
Solution Approach 1:
A satellite radio link acts as an intermediary transmission medium to connect remote locations (aircraft, ships, islands) to the terrestrial mobile communications network, enabling service availability without requiring complete local infrastructure
Solution Approach 2:
The mobile communications system is segmented into essential elements (terminal devices, base stations) that can be selectively deployed in remote locations, connected via satellite link to the main network, avoiding the need for complete infrastructure replication
2Reliability
If network elements are positioned close to the mobile terminal device, then registration procedure reliability is improved, but device complexity and cost increase
Solution Approach 1:
The network is pre-configured with extended validity periods for request references and adjusted timing parameters to anticipate and accommodate long propagation delays before actual communication occurs
Solution Approach 2:
Network parameters such as request reference validity duration, retransmission limits, and timing advance values are modified to suit the specific propagation delay characteristics of remote locations connected via satellite
3Reliability
If request reference validity period is extended, then registration reliability under delay is improved, but time resources are consumed inefficiently
Solution Approach 1:
The request reference validity period is made dynamic rather than static - it is extended specifically for connections identified as having long propagation delays (satellite links), while maintaining normal timing for standard terrestrial connections
Solution Approach 2:
The network dynamically adjusts the validity period parameter of request references based on the propagation delay characteristics of the specific connection, extending it only when necessary for satellite-connected devices
Data Source
AI summary
A method, system and device are provided for carrying out a login procedure of a mobile terminal into a mobile communications network. To compensate for a time delay on the communications channel between a base station and a control unit, a device is inserted into the connection between the base station and the control unit. The device is arranged between the base station and the section which is subject to time delay in the communications channel. The device stores the query reference broadcast by the mobile terminal device during each initiation of a login procedure and replaces the query reference in the reply with the query reference currently stored in this device. Thus, the mobile terminal device can carry out the login procedure even in the presence of time delays on the connection between the base station and the control unit.