Access Point Local Duplicate IP Address Detection
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Solution Overview
Problem
In high-density wireless networks, the DHCP server can become a bottleneck, leading to reduced communication performance due to the need for electronic devices to check for unique IP addresses, resulting in excessive management traffic and degraded network performance.
Innovation Solution
An access point with antenna and network nodes performs local duplicate address detection by comparing requested IP addresses with stored addresses, reducing the need for network-wide checks and managing traffic, thereby improving communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electronic devices send multicast packets to check for duplicate IP addresses, then duplicate address detection is achieved, but network management traffic increases and communication performance degrades
Solution Approach 1:
The patent segments the duplicate address detection process into two parts: local detection within the Basic Service Set (BSS) performed by the access point, and network-wide detection handled by a controller. This segmentation allows the access point to quickly resolve local duplicates without generating excessive multicast traffic across the entire network, thus maintaining detection reliability while improving communication performance.
Solution Approach 2:
The access point acts as an intermediary between electronic devices and the network controller for duplicate address detection. Instead of devices directly sending multicast packets across the network, the access point receives detection requests, performs local comparison against its stored address list, and only contacts the controller when needed. This intermediary role reduces network traffic while maintaining accurate duplicate detection.
2Reliability
If the DHCP server assigns IP addresses, then centralized address management is achieved, but the DHCP server becomes a bottleneck in high-density environments
Solution Approach 1:
The patent segments the address management function by maintaining a distributed list of assigned IP addresses across multiple access points, rather than requiring all address management operations to pass through a central DHCP server. Each access point stores and checks against a portion of the address space, enabling faster local address assignment while maintaining centralized coordination through the controller for conflict resolution.
3Extent of automation
If electronic devices automatically assign themselves IP addresses, then DHCP server dependency is reduced, but network-wide duplicate detection requires extensive multicast traffic
Solution Approach 1:
The patent implements local quality by enabling each access point to perform duplicate address detection independently within its own BSS using a locally stored address list. This local capability allows devices to automatically assign addresses with minimal network traffic, as the access point can quickly determine local uniqueness without requiring extensive multicast communication across the entire network.
Data Source
AI summary
An access point that detects a duplicate address is described. During operation, the access point may receive a request associated with an electronic device, where the request includes an address of the electronic device (such as an IP address). In response, the access point may perform a comparison of the address to stored addresses of one or more electronic devices that are associated with the access point. When the comparison indicates that the address is in use by another electronic device in the one or more electronic devices, the access point may provide a response addressed to the electronic device that indicates that the address is in use. Otherwise, the access point may check with a remainder of a network to see if the address is in use. If the address is in use, the access point may provide the response.