Address Pool Management Server for IP Allocation
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Solution Overview
Problem
Existing IP address allocation methods in access networks lead to increased load on subscriber authentication servers and inefficient use of IP addresses, resulting in service disruptions when connection requests from multiple user terminals concentrate on a single access server, despite a sufficient total number of IP addresses.
Innovation Solution
Implementing a packet forwarding apparatus with an address pool management server that manages sub-address pools, allowing access servers to acquire IP addresses from this central server for user terminals, reducing the load on subscriber authentication servers and optimizing IP address usage across the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If IP addresses are managed by a subscriber authentication server, then IP address allocation can be centralized, but the load on the subscriber authentication server increases due to frequent updates of address status information
Solution Approach 1:
The patent segments the IP address management function by introducing a dedicated address pool management server that handles IP address allocation and status tracking, separating this responsibility from the subscriber authentication server. This segmentation allows the authentication server to focus on authentication tasks while the address pool server manages IP address distribution, thereby reducing the load on the authentication server.
2Productivity
If IP addresses are divided into sub-address pools for each access server, then allocation can be distributed, but IP addresses cannot be shared among multiple access servers leading to inefficiency
Solution Approach 1:
The patent introduces an address pool management server as an intermediary between access servers and the IP address pool. This intermediary maintains a shared address pool that multiple access servers can access, enabling efficient IP address allocation while allowing addresses to be shared across different access servers. The intermediary manages the distribution and tracking of IP addresses to ensure proper allocation and prevent conflicts.
Data Source
AI summary
An access network system connected to an ISP network including a subscriber authentication server comprised of a plurality of packet forwarding apparatuses each for connecting user terminals to an Internet network via the ISP network and an address pool management server having an address pool management table for holding, as a sub-address pool, a plurality of IP addresses usable over the ISP network. Each of the packet forwarding apparatuses acquires from the address pool management server an IP address to be allocated to the user terminal having requested connection to the Internet when the subscriber authentication server has succeeded in authentication of the user terminal.