Wireless Display Docking via Infrastructure Network Subnet Discovery
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Solution Overview
Problem
Device-to-Device (D2D) discovery is challenging in enterprise environments due to limitations in conventional technologies like BONJOUR and UPnP, particularly across subnets, where router updates are often slow to implement.
Innovation Solution
The implementation of Intel PRO WiDi technology for wireless display docking, which uses WiFi Direct and infrastructure networks to enable efficient discovery and connectivity between client devices and receivers through a method involving WiFi scans, SSID identification, and RTSP protocol for streaming content over infrastructure networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional D2D discovery technologies like BONJOUR and UPnP are used, then service discovery can be achieved within local networks, but they cannot work across subnets due to router configuration limitations
Solution Approach 1:
The patent introduces an intermediary mechanism where the client device initiates outbound TCP connections to the receiver's IP address and port. This intermediary connection approach bypasses the subnet limitations of multicast-based protocols like BONJOUR, enabling reliable discovery and connection across different network subnets without requiring router configuration changes.
Solution Approach 2:
Instead of using inbound multicast discovery protocols that fail across subnets, the patent inverts the approach by having the client initiate outbound connections to the receiver. This reversal of connection direction allows traffic to flow successfully across subnet boundaries, solving the fundamental limitation of conventional D2D discovery in enterprise networks.
2Adaptability or versatility
If router updates are implemented to support BONJOUR across subnets, then multicast DNS forwarding can be enabled, but large-scale environment updates are slow and IT upgrades take place at a very slow pace
Solution Approach 1:
The patent extracts the subnet forwarding dependency from the discovery mechanism. Instead of relying on router-level multicast DNS forwarding capabilities that require infrastructure updates, the solution removes this dependency by using outbound TCP connections that work across subnets without any router configuration changes, enabling immediate deployment.
Solution Approach 2:
The system performs self-service discovery and connection establishment without requiring external infrastructure support. The client device autonomously discovers and connects to receivers using outbound connections, eliminating the need for IT departments to update router firmware or configure subnet forwarding rules.
3Ease of operation
If WiFi Direct is used for direct device connection, then discovery can occur without infrastructure, but connection cannot be established over infrastructure networks
Solution Approach 1:
The patent merges the simplicity of direct WiFi discovery with the flexibility of infrastructure-based connections. The system uses WiFi scanning for easy device discovery (like WiFi Direct) but then establishes connections over the existing infrastructure network using TCP ports, combining the advantages of both approaches.
Solution Approach 2:
The receiver device is made multi-functional by listening on a specific TCP port (35507) for incoming discovery connections while also being discoverable via WiFi scanning. This universal approach allows the same infrastructure to support both direct WiFi-style discovery and networked connections, adapting to different deployment scenarios.
Data Source
AI summary
Apparatuses and methods may provide for technology that uses a wireless display docking over an infrastructure network by receiving, via a WiFi link, information associate with an infrastructure discovery of a receiver, using the information to discover the receiver via an infrastructure network i link, forming a connection with the receiver via the infrastructure network link, and streaming content to the receiver via the connection. In addition, receiver technology may emit a beacon signal via a WiFi link, form a connection with a client device via an infrastructure network link, and receive streamed content from the client device via the infrastructure network link.