Wireless Terminal Dynamic IP Announcement via Name Server
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Solution Overview
Problem
Current solutions for providing address information for wireless terminals with dynamic IP addresses are either not optimal, as they require wireless network operators to share reachability information, which they are reluctant to do for free, or they rely on specific protocols like SIP that may not be universally supported.
Innovation Solution
A method where the wireless terminal itself announces its current public IP address to other communicating parties or an external name server, which conditionally distributes this information based on profile settings, allowing direct notification or storage and retrieval of the IP address.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless network operators provide address information for wireless terminals with dynamic IP addresses, then reachability of wireless terminals is improved, but network operators lose control over their information and may incur costs
Solution Approach 1:
The wireless terminal itself announces its current public IP address to other communicating parties or to an external name server, eliminating the need for network operators to manually provide or manage address information. This self-service approach resolves the contradiction by enabling reachability improvement while maintaining operator control over their networks.
Solution Approach 2:
An external name server acts as an intermediary to store and distribute the public IP address of the wireless terminal. The terminal notifies the name server of its address, which then conditionally distributes this information to authorized parties. This intermediary solution improves reachability while preserving operator control through conditional distribution mechanisms.
2Reliability
If wireless terminals announce their IP address directly to all parties, then reachability is improved, but information security deteriorates due to unrestricted access
Solution Approach 1:
The name server implements conditional distribution of address information based on profile settings and authorization. Different parties receive address information only when specific conditions are met, such as being authorized or having a valid reason to contact the terminal. This local quality approach ensures that reachability is improved for authorized parties while information security is maintained through selective disclosure.
3Device complexity
If NAT device uses many-to-one mapping, then network address translation is simplified, but direct contact to wireless terminal becomes impossible
Solution Approach 1:
The wireless terminal proactively announces its current public IP address to the name server or directly to communicating parties before external contact is attempted. This preliminary action ensures that when external parties need to contact the terminal, they already have the current address information, enabling direct contact despite NAT mapping complexities.
4Quantity of substance
If public IP address is dynamically allocated to wireless terminal, then IP address scarcity is addressed, but address tracking becomes complex
Solution Approach 1:
The wireless terminal itself is responsible for tracking and announcing its dynamically allocated public IP address. Instead of requiring external systems to track address changes, the terminal autonomously monitors its own address and notifies relevant parties or the name server of changes. This self-service approach addresses IP scarcity through dynamic allocation while simplifying address tracking by making the terminal responsible for its own address management.
Data Source
AI summary
The invention relates to a method of providing address information for reaching a wireless terminal, the wireless terminal being connected to a first wireless communication network, a varying public address being dynamically allocated to the wireless terminal, and the wireless terminal being reachable from outside of the first wireless communication network by means of the varying public address. The method comprises dynamically notifying substantially directly at least one other communicating party of a current public address of the wireless terminal.