Subscriber Server DNS Update for Mobile Terminated Communication
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Solution Overview
Problem
Existing mobile terminated communication methods in mobile communication systems, such as the Evolved Packet System (EPS) architecture, face challenges in initiating communications when the destination device's IP address is dynamically assigned and unknown, leading to complexity and delays, especially in cases like 'push' and peer-to-peer communications.
Innovation Solution
A method that involves a subscriber server updating a DNS record with a static unique identifier of the destination device in an authoritative DNS server, allowing mobile terminated communications by receiving the destination device's IP address and using DNS queries to facilitate IP packet delivery through tunneling border devices for encapsulation and decapsulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate channel (e.g. SMS) is used for delivery of push stimulus to the terminal, then mobile terminated communication can be enabled, but device complexity increases due to additional communication channel requirements
Solution Approach 1:
The patent extracts the push stimulus delivery mechanism from the traditional SMS separate channel and integrates it into the IP packet communication flow. The subscriber server updates the DNS record with the terminal's IP address, allowing direct IP-based communication without requiring a separate SMS channel, thereby reducing device complexity while maintaining MT communication capability
Solution Approach 2:
The patent makes the IP packet communication system multi-functional by enabling it to serve both client-server communications and mobile terminated push communications through a single unified mechanism. The DNS-based address resolution system handles both types of communications, eliminating the need for separate communication channels and reducing overall system complexity
2Reliability
If IMS subsystem is overlaid for peer-to-peer communications, then mobile terminated communication is enabled, but device complexity increases due to additional client software requirements
Solution Approach 1:
The patent extracts the peer-to-peer communication functionality from the complex IMS subsystem overlay and implements it directly within the existing IP packet communication framework. By using DNS record updates to resolve terminal addresses, the system achieves peer-to-peer communication without requiring additional IMS client software, thereby reducing device complexity
Solution Approach 2:
The patent merges the peer-to-peer communication functionality with the existing client-server IP communication infrastructure. Both communication types share the same DNS resolution mechanism and IP packet handling processes, eliminating the need for separate IMS software layers and reducing overall device complexity
3Reliability
If traditional SMS or IMS approaches are used for mobile terminated communication, then communication capability is achieved, but communication delay increases making them less suitable for time critical delivery
Solution Approach 1:
The patent performs preliminary action by having the terminal proactively update the DNS record with its current IP address upon attaching to the network or when the IP address changes. This pre-registration mechanism ensures that when a push communication is needed, the server can immediately resolve the terminal's address through DNS without waiting for SMS notification or IMS signaling, thereby reducing communication delay for time-critical deliveries
Data Source
AI summary
Method for allowing a mobile terminated communication to a destination device (2) through at least one mobile communication network (10) from a source entity (1) located in a public IP address network (9). The method comprises: a subscriber server (3) of the mobile communication network receiving an IP address (“D”) of the destination device from a node (4) of the mobile communication network, and the subscriber server updating a DNS record containing a static unique identifier of the destination device stored in an authoritative DNS server (5) reachable via the public IP address network, with said destination device IP address.