Wireless Video Distribution via UDP Port Multicast
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Solution Overview
Problem
Conventional wireless communication devices face bandwidth limitations when streaming video in public settings, leading to slowdowns as multiple devices request video data simultaneously from a single access point.
Innovation Solution
A system that uses a video server to create a single stream of UDP data packets with different port numbers for each video source, allowing multiple video channels to be multicast to wireless communication devices through wireless access points, overcoming bandwidth constraints by enabling multiple devices to receive the same stream without consuming excessive bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple wireless devices simultaneously request video data from a single access point, then each device can receive video streams, but the access point experiences bandwidth limitations and slowdowns
Solution Approach 1:
The patent segments the video distribution by creating separate unicast connections from the access point to each wireless device, rather than relying on a single multicast stream. This segmentation allows the access point to manage bandwidth more effectively by controlling individual device connections, resolving the contradiction between serving multiple devices and avoiding bandwidth overload.
2Loss of energy
If a single multicast stream is used to deliver video to multiple devices, then bandwidth efficiency is improved, but the ability to provide personalized video content to each device is reduced
Solution Approach 1:
The patent implements a dynamic system where the access point can switch between multicast and unicast modes based on device needs and network conditions. This dynamic approach allows the system to maintain bandwidth efficiency through multicast when appropriate while enabling personalized content delivery through unicast connections when devices require customized video streams, thus resolving the contradiction between efficiency and adaptability.
3Ease of operation
If conventional WiFi connections are used in public settings, then network access is available, but the connection process requires user intervention to search and select networks
Solution Approach 1:
The patent implements preliminary action by having wireless devices automatically connect to the access point upon entering the coverage area, eliminating the need for users to manually search and select networks. The access point is pre-configured with device identification information, enabling automatic authentication and connection establishment, thus resolving the contradiction between ease of access and connection setup time.
Data Source
AI summary
A multimedia distribution system receives multiple television channels and transcodes them into a single stream of data packets with each of the plurality of video data packets for respective ones of the television channels being assigned a port number corresponding to the respective television channel. The data packets are routed to a plurality of Access Points (APs) for transmission. A User Equipment (UE) communicates with the APs and selects one of the television channels for viewing on the UE by selecting the port number corresponding to the desired television channel. The UE can “change channels” to view other television channels by changing the port number to the port number of the desired television channel.