Wireless Client Address Assignment via Beacon Indication
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Solution Overview
Problem
In wireless networks, especially WLANs, the delay in determining the availability of a DHCP server for IP address assignment can take 30 to 60 seconds, significantly impacting user experience and mobile device connectivity due to the need for repeated DHCP requests before switching to link-local addressing.
Innovation Solution
A communication system that includes a wireless communication device capable of determining the type of IP address assignment employed by a wireless network based on received signals, allowing it to establish a network-layer connection quickly without relying on DHCP server availability checks, thereby reducing connection time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a device sends multiple DHCP requests to determine server availability, then reliable IP address assignment is ensured, but network connection time increases to 30-60 seconds
Solution Approach 1:
The patent applies preliminary action by having the wireless network announce its DHCP server availability status in advance through beacon frames before any DHCP requests are sent. This allows devices to know beforehand whether DHCP is available, eliminating the need for multiple retry requests and reducing connection time from 30-60 seconds to near-instantaneous connection.
2Reliability
If a device waits for DHCP server availability confirmation, then proper IP address assignment is achieved, but user experience deteriorates due to long delays
Solution Approach 1:
The system performs preliminary action by announcing DHCP availability status in beacon frames before connection establishment. This allows devices to immediately determine the appropriate addressing mode without waiting for DHCP server responses, providing instant connection feedback to users while ensuring proper IP address assignment through the announced methodology.
3Adaptability or versatility
If a wireless network uses standard DHCP discovery process, then address assignment compatibility is maintained, but connection speed decreases due to repeated requests
Solution Approach 1:
The patent maintains address assignment compatibility through preliminary action by announcing the DHCP availability status and addressing methodology in beacon frames before connection. This allows devices to immediately adopt the correct addressing mode (DHCP or link-local) without repeated discovery requests, achieving both compatibility and fast connection speed simultaneously.
Data Source
AI summary
A wireless client device includes a receiver and a connection module. The receiver is configured to receive, on a wireless medium of a wireless network, a management frame that is periodically transmitted on the wireless medium. The management frame includes an address assignment indication that indicates which address assignment types are employed by the wireless network. The connection module is configured to, in response to the address assignment indication indicating that a dynamic address assignment type is employed by the wireless network, configure a network-layer address for the wireless client device according to a dynamic address assignment protocol. The connection module is configured to, in response to the address assignment indication indicating that the dynamic address assignment type is not employed by the wireless network, configure the network-layer address for the wireless client device according to a link-local address assignment protocol.