Cross-domain Multimedia Resource Identification via Address Conversion
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Solution Overview
Problem
The Universal Plug and Play (UPnP) protocol is limited to internal local area networks (LANs) and cannot determine whether data content belongs to an internal or external network, preventing normal browsing of cross-domain data.
Innovation Solution
A cross-domain multi-media resource identification system using digital OTT-BOXes and routers in both LANs, establishing equipment lists and converting internal internet addresses to actual external internet addresses through a wireless network tunnel, allowing correct identification and access to shared multimedia resources across domains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If UPnP protocol is used for multi-media resource sharing, then ease of operation is improved, but adaptability deteriorates because it cannot work across different domains
Solution Approach 1:
The patent introduces a domain name as an intermediary layer between internal LAN addresses and external network addresses. The domain name serves as a mediator that allows UPnP protocol to work across different domains by translating internal addresses into externally accessible addresses while maintaining the simplicity of UPnP operation within each domain.
Solution Approach 2:
The patent segments the network addressing system into two parts: internal LAN addressing (handled by UPnP) and external network addressing (handled by domain names). This segmentation allows each part to operate independently with its own addressing rules, enabling cross-domain functionality while preserving local simplicity.
2Device complexity
If internal LAN addressing is used, then device complexity is reduced, but adaptability deteriorates because cross-domain access is impossible
Solution Approach 1:
The domain name system provides a universal addressing mechanism that works both within a single domain and across multiple domains. It serves multiple functions: local address resolution, cross-domain identification, and external network access, thereby increasing adaptability without significantly increasing device complexity.
3Adaptability or versatility
If cross-domain access is enabled, then adaptability is improved, but loss of information increases due to address conversion ambiguity
Solution Approach 1:
The patent implements a feedback mechanism where the domain name structure includes information about the source domain and target domain. This feedback allows the system to track address conversions and maintain information about the original internal address, preventing information loss during cross-domain access.
Data Source
AI summary
The invention provides a cross-domain multi-media resource identification system and a method thereof. The method includes: the first router transmits the first equipment list of the first LAN to the second router; the second router transmits the second equipment list of the second LAN to the first router; a first electronic device transmits a read request to the second router through the first router when the first electronic device in the first LAN intends to obtain a specific multi-media file of a second electronic device in the second LAN; the second router returns a text message file to the first router; the first router converts the specific internal internet address into an actual external internet address according to the text message file; the first electronic device plays the specific multi-media file according to the actual external internet address.