WLAN Service Discovery Group Identity Query Method
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Solution Overview
Problem
In wireless local area networks (WLANs), the current method of broadcasting service queries leads to resource wastage and increased power consumption as all devices receive and parse broadcast frames, even if they are not capable of providing the requested service.
Innovation Solution
A method where a responding device receives a broadcast query request message, obtains and records a group identity if it meets the query condition, and subsequently processes subsequent query messages only when the receiving address matches this group identity, reducing unnecessary processing and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If broadcast query frames are sent to the entire WLAN to discover services, then service discovery capability is improved, but resource waste and power consumption increase
Solution Approach 1:
The patent segments the WLAN device population into different groups based on their service providing capabilities. Instead of all devices receiving and processing every broadcast query, devices are divided into groups where only relevant groups process specific query types. This segmentation reduces the number of devices that need to actively process each query frame, thereby reducing power consumption and resource waste while maintaining comprehensive service discovery capability.
2Loss of information
If all devices receive and parse broadcast frames to check service capability, then complete service information is obtained, but processing overhead and resource waste increase
Solution Approach 1:
The patent implements preliminary action by having devices pre-configure their group identities based on their service capabilities before queries are broadcast. When a broadcast query is received, devices can quickly determine whether to process it by checking if their group identity matches the query's target group, without needing to fully parse the frame content. This preliminary grouping action reduces processing overhead while ensuring that all necessary service information is still collected from the appropriate devices.
3Loss of information
If broadcast queries are sent to inquire detailed service information, then comprehensive service details are gathered, but resource waste increases as irrelevant devices process the queries
Solution Approach 1:
The patent applies local quality by making query processing behavior specific to each device's local characteristics (service capabilities and group identity). Instead of a uniform approach where all devices process all queries, each device is configured to process only those queries relevant to its local service capabilities. This localized processing approach ensures comprehensive service detail information is gathered from appropriate devices while minimizing network resource waste from irrelevant processing.
Data Source
AI summary
Embodiments of the present invention provide an information query method and device, which can reduce a waste of resources in an information query process, and decrease power consumption. The method includes: sending, by a requesting device in a broadcast manner, a first query request message, where the first query request message carries a first query condition and information about a group identity; and when the requesting device receives a first query response message sent by a responding device that meets the first query condition, sending, by the requesting device, a second query request message that uses the group identity as a receiving address, so that the responding device processes the second query request message.