Wireless Client Capability Update Before Channel Switch
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Solution Overview
Problem
In wireless local area networks (WLANs), especially those operating under IEEE 802.11 standards, there is a challenge in efficiently utilizing the capabilities of clients after a channel switch, as existing methods often rely on reassociation processes that are time-consuming and disruptive, failing to fully exploit the enhanced capabilities of the new channel.
Innovation Solution
Implementing a protocol where clients communicate their capabilities to the access point (AP) before a channel switch through a channel usage request frame, allowing the AP to accurately determine and utilize the full potential of the target channel without the need for reassociation, thereby ensuring seamless and efficient communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reassociation process is used to update client capabilities after channel switch, then client capabilities are updated, but communication disruption and time delay increase
Solution Approach 1:
The patent applies preliminary action by having the access point transmit the target channel number before the channel switch occurs. This allows the client to prepare capability update information in advance and send it to the access point before the actual channel switching takes place, thereby avoiding the need for time-consuming reassociation processes after the switch.
Solution Approach 2:
The patent introduces an intermediary mechanism where the access point sends a channel notification message containing the target channel number to the client before the channel switch. This intermediary communication enables the client to proactively provide capability update information without requiring full reassociation, thus reducing disruption and time loss.
2Reliability
If reassociation process is used after channel switch, then client capabilities are synchronized, but communication disruption increases
Solution Approach 1:
The patent implements preliminary action by enabling the client to send capability update information to the access point before the channel switch occurs. The access point receives the target channel number in advance and prepares to receive capability updates, ensuring capability synchronization is achieved without requiring disruptive reassociation after the switch.
Solution Approach 2:
The patent uses an intermediary channel notification message as a mediator between the access point and client. This message enables capability synchronization to be achieved through a lightweight exchange rather than full reassociation, maintaining communication continuity while ensuring capabilities are properly synchronized.
3Productivity
If traditional channel switch method is used, then channel switching is achieved, but full potential of target channel capabilities is not utilized
Solution Approach 1:
The patent applies preliminary action by having the access point transmit the target channel number before the channel switch, allowing the client to prepare and send capability update information in advance. This ensures that when the channel switch occurs, the access point already has the latest capability information, enabling full utilization of the target channel's potential without waiting for post-switch reassociation.
Solution Approach 2:
The patent implements feedback by establishing a two-way communication mechanism where the access point notifies the client of the target channel, and the client responds by providing capability update information. This feedback loop ensures that capability information is accurately transmitted and received, enabling optimal utilization of the target channel's capabilities.
Data Source
AI summary
Methods, apparatuses, and computer readable media for updating capabilities, where a station (STA) comprises processing circuitry configured to: transmit to an access point (AP) on a first channel of a first band, an association request including a first capabilities element for a first communications standard, decode, from the AP on the first channel of the first band, an association response, the association response including a second capabilities element for the first communications standard on the first band, transmit to the AP, a channel usage request frame with a third capabilities element for a second communications standard on a second channel of a second band, and encode for transmission to the AP on the second channel of the second band, a data frame using the third capabilities element and a fourth capabilities element received from the AP on the first channel on the first band.