Address Allocation for Home Network Appliances via MAC Binding
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Solution Overview
Problem
Current household network protocols are insecure, complex, and inefficient, allowing external access to information appliances, threatening user privacy and increasing costs due to unnecessary device discovery and service listing, with limited IPv4 address resources.
Innovation Solution
A method where a main processing module allocates data bus addresses to intelligent information appliances through an adapter unit, using MAC addresses to isolate internal communications, simplifying protocol stacks and ensuring external networks communicate only through the host device, thereby enhancing security and reducing costs by eliminating direct appliance communication and service listings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If TCP/IP protocol stack is used for household networks, then information appliances can access the Internet and communicate with external networks, but household networks become vulnerable to external security threats and privacy leaks
Solution Approach 1:
The patent introduces a home gateway as an intermediary device between the household network and external networks. The gateway performs address translation and protocol conversion, allowing internal appliances to communicate externally while hiding their real IP addresses. This mediator architecture maintains network connectivity while protecting against external security threats by controlling all external access through a single secure interface.
Solution Approach 2:
The patent segments the network into two distinct zones: an internal household network using private IP addresses and an external public network using IP addresses. This segmentation isolates internal appliances from direct external access, allowing them to maintain connectivity through the gateway while being protected from external security threats that would otherwise directly target individual appliances.
2Productivity
If device discovery and service listing mechanisms are implemented, then real-time device discovery is enabled, but protocol complexity and device costs increase
Solution Approach 1:
The patent implements a simplified discovery mechanism where devices automatically obtain their IP addresses through router-based automatic configuration and actively announce their presence on the network. This self-service approach eliminates the need for complex service listing mechanisms, reducing protocol complexity while maintaining efficient real-time device discovery through simple broadcast announcements.
3Quantity of substance
If IPv4 addresses are assigned to all information appliances, then each device can be uniquely identified, but IP address resource exhaustion occurs
Solution Approach 1:
The patent segments the addressing space by implementing a two-level address scheme: private IP addresses for internal household appliances and public IP addresses for the home gateway only. This allows multiple devices to share a single public IP address through NAT (Network Address Translation), enabling numerous devices to be addressable without exhausting IPv4 address resources while maintaining unique identification capability.
Data Source
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AI summary
The present invention relates to a method for allocating addresses to intelligent information appliances and their subordinate devices, this method comprising: the network side sends down-link broadcast message, triggering intelligent information appliances newly connected to the network to return device connection information containing its MAC address to the network side; or an newly connected information appliance sends broadcast message carrying device connection information to the network side; after the host at the network side receives the device connection information, the host allocates and stores an unused data bus address for the intelligent information appliance. The network side implements the allocation of data bus addresses to the intelligent information appliances by establishing corresponding relation between intelligent information appliances' MAC addresses and data bus addresses, without the need of using other higher layer protocols, thus simplifying the protocol stacks, turning the intelligent information appliance in the household network into an external device of the host in the household network, which is invisible to external networks, greatly improving safety of the household network, reducing complexity of the appliance, thus reducing cost of the appliance.