Unprovisioned Wireless Access Point Provisioning via DHCP and SSID Advertising
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Solution Overview
Problem
Existing provisioning methods for wireless access points in a swarm fail when devices start up unprovisioned, especially in dynamic networks with potential IP address conflicts and lack of wired connections, leading to incomplete or failed setup processes.
Innovation Solution
The method involves unprovisioned wireless access points obtaining an IP address through DHCP, searching for or electing a Provisioning Master, configuring their DHCP server, and advertising a specific SSID for provisioning, with the Provisioning Master handling authentication and configuration distribution to all swarm members, ensuring consistent operation across regulatory domains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a standalone AP uses a fixed IP address for provisioning, then the provisioning process is simple, but it fails when the local network already has a device active at that fixed IP address
Solution Approach 1:
The AP performs preliminary actions by attempting to obtain an IP address via DHCP before proceeding with provisioning. This preliminary network configuration step allows the AP to detect IP conflicts and adapt its provisioning approach accordingly, rather than assuming a fixed IP address is available.
Solution Approach 2:
The provisioning system transitions from a static fixed IP address model to a dynamic IP address model using DHCP. The AP dynamically obtains its IP address from the network, allowing the provisioning process to adapt to existing network conditions and avoid conflicts with other devices.
2Adaptability or versatility
If mesh-based APs are used in a swarm, then wireless connectivity is improved, but traditional wired provisioning methods become inapplicable
Solution Approach 1:
A Provisioning Master AP acts as an intermediary in the provisioning process. The master AP receives provisioning information from external sources and distributes it to other swarm members wirelessly. This intermediary approach enables mesh-based APs to be provisioned without requiring direct wired connections to each device.
Solution Approach 2:
The swarm provisioning system uses self-service mechanisms where APs automatically obtain provisioning information through wireless communication with the Provisioning Master. The provisioning process occurs automatically through the wireless network without requiring manual wired configuration of each mesh-based AP.
3Ease of operation
If an unprovisioned AP advertises a provisioning SSID, then provisioning capability is enabled, but regulatory domain restrictions may prevent transmission on desired channels
Solution Approach 1:
The AP performs preliminary actions by attempting to obtain an IP address via DHCP before proceeding with provisioning. This preliminary network configuration step allows the AP to detect IP conflicts and adapt its provisioning approach accordingly, rather than assuming a fixed IP address is available.
Solution Approach 2:
The system changes operational parameters by using a predetermined SSID specifically for provisioning purposes. This parameter change allows the AP to advertise a known SSID that clients can recognize and connect to for provisioning, while the underlying channel and power settings are automatically adjusted to comply with regulatory domain restrictions.
Data Source
AI summary
When an access point (AP) is first powered up, it lacks provisioning information such as channel numbers, power levels, SSIDS, security settings, and so on. The process of supplying this information required to get the AP operating as part of a network is called provisioning. An unprovisioned AP in a swarm first attempts to obtain a DHCP address. Once it gets a DHCP address or selects an address such as from the link-address (169.254.xx.xx) group, it advertises a predetermined wireless SSID.