Wi-Fi Display Session Latency Reduction via Preliminary Capability Negotiation
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Solution Overview
Problem
In Wireless Fidelity (Wi-Fi) Display networks, the frequent establishment of new Transport Control Protocol (TCP) connections introduces latency in streaming multimedia content, as capability negotiation and exchange are required before each session, leading to additional delays.
Innovation Solution
Establishing a Wi-Fi display session with Wi-Fi sink devices prior to capability negotiation and streaming multimedia content using a basic codec format, allowing simultaneous capability negotiation and seamless continuation with negotiated codec formats, thereby reducing latency and improving streaming efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a new TCP connection is established for every WFD session, then reliable data transmission is ensured, but latency increases due to repeated connection setup and capability negotiation
Solution Approach 1:
The patent applies preliminary action by establishing the TCP connection before the WFD session is actually needed. The connection is set up in advance during the WFD group formation phase, so that when multimedia streaming requires a WFD session, the transport layer is already ready and capable negotiation can proceed immediately without connection setup delay.
Solution Approach 2:
The patent merges the TCP connection establishment process with the WFD group formation process. Instead of treating them as separate sequential operations, the connection is established as part of the group formation workflow, combining two necessary steps into a more integrated and efficient process that reduces overall latency.
2Adaptability or versatility
If capability negotiation is performed before establishing WFD session, then proper codec configuration is ensured, but additional latency is introduced
Solution Approach 1:
The patent applies preliminary action by performing capability negotiation during the WFD group formation phase rather than waiting until the multimedia streaming session begins. This allows the source device and sink devices to exchange capability information and agree on codecs in advance, so that when actual streaming starts, the configuration is already in place and no additional negotiation delay occurs.
Data Source
AI summary
A method and system for streaming multimedia content in a Wireless Fidelity (Wi-Fi) Display (WFD) network environment are provided. The method includes establishing a Wi-Fi display session with at least one Wi-Fi sink device by a Wi-Fi source device prior to capability negotiation with the at least one Wi-Fi sink device; streaming multimedia content to the at least one Wi-Fi sink device using a basic codec format during the Wi-Fi display session; performing capability negotiation with the at least one Wi-Fi sink device substantially simultaneously with streaming the multimedia content using the basic codec format during the Wi-Fi display session; and seamlessly continuing to stream the multimedia content to the at least one Wi-Fi sink device using a codec format negotiated during the capability negotiation.