Access Point Group-Addressed Transmission for Wireless Medium Efficiency
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Solution Overview
Problem
In wireless local area networks and cellular networks, the transmission of Generic Advertisement Service (GAS) frames and Fast Initial Link Setup (FILS) Discovery frames results in inefficient usage of the wireless medium, particularly before network connectivity is established, due to the unicast nature of these messages which can lead to excessive communication when multiple devices query for similar information.
Innovation Solution
Implementing group-addressed transmission of information by access points (APs) based on criteria such as the number of queries received or medium congestion, allowing APs to switch between unicast and group-addressed modes to optimize message delivery, thereby reducing the number of frames transmitted and improving medium efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If unicast transmission is used for GAS frames and FILS Discovery frames, then each device can receive personalized information, but the number of frames transmitted increases excessively when multiple devices query for similar information
Solution Approach 1:
The patent merges multiple unicast transmissions into a single group-addressed transmission when multiple devices query for the same information. The AP identifies common information requests from multiple devices and sends a single group-addressed frame containing the requested information, thereby reducing the total number of frames transmitted while ensuring all querying devices receive the information reliably.
Solution Approach 2:
The patent dynamically switches between unicast and group-addressed transmission modes based on real-time network conditions. When multiple devices query for similar information, the system transitions to group-addressed mode; when queries are unique or sparse, it reverts to unicast mode. This dynamic adaptation optimizes wireless medium efficiency while maintaining information delivery reliability.
2Productivity
If group-addressed transmission is used for GAS frames and FILS Discovery frames, then the number of frames transmitted is reduced, but devices cannot receive personalized information
Solution Approach 1:
The patent segments information transmission into common information suitable for group-addressed delivery and device-specific information requiring unicast delivery. When processing queries, the AP identifies which information can be generalized for group transmission and which requires personalized unicast transmission, thereby preventing loss of personalized information while maintaining wireless medium efficiency.
Solution Approach 2:
The patent introduces an intermediary mechanism where the AP acts as a mediator that receives group-addressed queries, processes them to identify common information, and then selectively delivers information through appropriate channels. This intermediary process ensures that personalized information is not lost while still benefiting from reduced frame transmission for common information.
3Ease of operation
If unicast transmission is used, then information can be delivered to individual devices, but excessive communication occurs when multiple devices query for similar information
Solution Approach 1:
The patent merges multiple individual unicast queries for similar information into a single group-addressed transmission. When the AP detects that multiple devices are querying for the same or similar information, it consolidates these queries and sends one group-addressed frame, thereby reducing wireless medium bandwidth consumption while still enabling individual devices to access the information they need.
Solution Approach 2:
The patent changes the transmission parameter from unicast to group-addressed mode based on the number of devices querying for similar information. This parameter change reduces bandwidth consumption for common information while maintaining ease of operation for individual devices through selective application of the group-addressed mode.
Data Source
AI summary
In some examples, an access point determines, based on at least one criterion that includes a non-time based criterion, whether to activate group-addressed transmission of information relating to an access network. In response to determining, based on the at least one criterion, to activate group-addressed transmission of information relating to the access network, the access point transmits information relating to the access network in a message targeted to a group address.