Communication Device Protocol Mismatch Handling
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Solution Overview
Problem
In environments where devices that execute the Wi-Fi Direct (WFD) protocol coexist with those that do not, conventional probe signal methods lead to unnecessary processing and low usability due to incorrect identification of connection destinations and failed connections.
Innovation Solution
A communication device with a reception unit for search request signals, first and second determination units to assess protocol execution and information elements, and a transmission unit that only responds to probe request signals when the device matches the protocol and information conditions, preventing unnecessary processing by avoiding responses to mismatched signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the WFD execution device replies to probe request signals from non-WFD execution devices, then the non-WFD execution device can identify the WFD execution device as a connection candidate, but this causes unnecessary connection attempts and processing overhead
Solution Approach 1:
The patent applies preliminary action by checking whether the probe request signal contains WFD information element elements before generating a probe response signal. This preliminary check prevents unnecessary processing by identifying incompatible devices in advance, avoiding the generation of response signals that would lead to failed connection attempts. The determination unit performs this preliminary assessment by examining the presence of specific information elements (such as IE 5, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100) that indicate WFD protocol support.
2Adaptability or versatility
If the WFD execution device transmits probe response signals to all probe request signals, then all devices can be detected as connection candidates, but this results in failed connections and user frustration
Solution Approach 1:
The patent applies local quality by making the probe response signal generation conditional based on the specific characteristics of the received probe request signal. Instead of uniformly responding to all probe requests, the determination unit examines local properties of the signal (presence of WFD information elements) and generates responses only for compatible devices. This selective approach ensures that probe response signals are transmitted only to devices that can successfully establish WFD connections, thereby improving connection success rate while maintaining adaptability to different device types.
3Ease of operation
If the non-WFD execution device receives probe response signals from WFD execution devices, then the WFD execution device appears as a connection candidate on the UI, but this leads to accidental selections and reconnection attempts
Solution Approach 1:
The patent applies preliminary action by performing a preliminary check of the probe request signal for WFD information elements before transmitting a probe response signal. This preliminary assessment prevents non-WFD execution devices from appearing as connection candidates on the UI, as no probe response signal is generated for incompatible devices. Consequently, users are not presented with misleading connection options, eliminating the need for reconnection attempts and reducing the time lost to failed connection processes.
Data Source
AI summary
A communication device includes a reception unit, first and second determination units, and a transmission unit. The reception unit receives a search request signal transmitted from another communication device. The first determination unit determines whether the communication device executes a specific protocol. The second determination unit determines whether information indicating the specific protocol is added to the received request signal. The transmission unit does not transmit a response to the received search request signal, when the communication device executes the specific protocol and the information is not added, or when the communication device does not execute the specific protocol and the information is added, and transmits the response when the communication device executes the specific protocol and the information is added or when the communication device does not execute the specific protocol and the information is not added, based on the determinations made by the first and second determination units.