Source Device Event Management for WLAN Sink Displays
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Solution Overview
Problem
In WLAN-based display systems, sink devices lack the ability to reflect their use environment, leading to uniform display of screen information from source devices, and there is a need to intercept events that violate security policies or contradict display sharing intentions.
Innovation Solution
A source device with an event processing unit, control unit, and determination unit manages events from sink devices by setting a predetermined event management area, intercepting events occurring outside this area to ensure security and intended display sharing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the sink device displays only the same screen as the source device displays, then the display consistency is maintained, but the use environment of the sink device cannot be reflected
Solution Approach 1:
The screen is divided into a first area (source device display area) and a second area (sink device native application area). This segmentation allows different display contents to coexist, enabling both display consistency for shared content and adaptability for native applications on the sink device.
Solution Approach 2:
Different areas of the screen have different functions and characteristics. The first area maintains display consistency by showing source device content, while the second area provides local adaptability by displaying sink device native applications, thus resolving the contradiction between uniformity and environmental adaptation.
2Reliability
If all events from the sink device are processed by the source device, then complete control is achieved, but the load on the source device increases
Solution Approach 1:
The determination unit extracts and filters out events that occur in the second area (sink device native application area) from the total event stream. Only events occurring in the first area (source device display area) are transmitted to the event processing unit, reducing the processing load while maintaining control over source device display areas.
Solution Approach 2:
Instead of processing all events from the sink device, the system selectively processes only partial events (those occurring in the first area). This partial action approach reduces processing load on the source device while maintaining sufficient control for the shared display area.
3Ease of operation
If events occurring outside the event management area are allowed, then user freedom is increased, but security policies and display sharing intentions may be violated
Solution Approach 1:
The determination unit performs preliminary filtering of events before they reach the event processing unit. By determining in advance whether an event occurs within the event management area (first area), the system prevents unauthorized events from compromising security policies while still allowing user freedom within the permitted area.
Solution Approach 2:
The determination unit acts as an intermediary between the event generation unit and the event processing unit. It mediates event transmission by filtering events based on their occurrence location, thus protecting security policies while maintaining user freedom within the designated event management area.
Data Source
AI summary
A source device includes an event processing unit processing an event which occurs in a remote sink device that communicates through a WLAN, a control unit setting an event management area of the sink device, and a determination unit determining whether the event transferred from the sink device has occurred in the event management area and outputting the event to the event processing unit when the event has occurred in the event management area.