VoIP Packet Compression via IP UDP Header Extraction
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Solution Overview
Problem
Conventional wireless LAN systems face inefficiencies in transmitting VoIP and video communications due to high overhead from IP and UDP headers, limiting the number of simultaneous VoIP connections and reducing transmission efficiency.
Innovation Solution
A packet compression system that removes IP and UDP headers from VoIP packets, allowing codec signals to be directly inserted into Ethernet frames without intermediate IP or UDP packets, and a packet restoration system that reinserts headers as needed to maintain communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If IP and UDP headers are included in VoIP packets for standard protocol compliance, then protocol reliability and routing capability are maintained, but header overhead increases and transmission efficiency deteriorates
Solution Approach 1:
The patent extracts and removes the IP and UDP headers from VoIP packets, keeping only the essential Ethernet frame structure with RTP payload. This extraction eliminates redundant header information that is not needed for the specific wireless LAN VoIP transmission scenario, thereby reducing overhead from 40+ bytes to minimal necessary framing while maintaining core functionality.
Solution Approach 2:
The patent applies local quality by optimizing the packet structure specifically for wireless LAN VoIP transmission rather than using generic IP/UDP framing. The Ethernet frame is customized to carry RTP payloads directly without standard TCP/IP encapsulation, creating a specialized local optimization for this specific communication scenario while maintaining compatibility with Ethernet infrastructure.
2Adaptability or versatility
If standard IP/UDP/RTP packet structure is used for VoIP communication, then protocol interoperability and routing capability are ensured, but the number of simultaneous VoIP connections is limited to six due to bandwidth constraints
Solution Approach 1:
By extracting the IP and UDP layers from the traditional packet structure, the patent creates a streamlined Ethernet-based VoIP transmission format. This reduction in protocol overhead frees up bandwidth resources, allowing the wireless LAN to support more simultaneous VoIP connections beyond the conventional limit of six, directly improving system productivity.
3Reliability
If codec signals are transmitted in real-time with short packet intervals, then communication quality is maintained, but the occupation ratio of headers in each packet increases and transmission efficiency is deteriorated
Solution Approach 1:
The patent removes IP and UDP headers that would otherwise occupy a large proportion of short VoIP packets. By extracting these redundant headers and using a simplified Ethernet frame structure, the header occupation ratio is dramatically reduced, allowing more of each transmitted byte to carry actual voice data, thereby improving transmission efficiency for real-time short packet communications.
Data Source
AI summary
A packet compression system of this invention includes: a reception unit for receiving at least one uncompressed packet, the uncompressed packet including a header and a payload of a second OSI layer, the payload of the second OSI layer including a header and a payload of a third OSI layer, the payload of the third OSI layer including a header and a payload of a fourth OSI layer, the payload of the fourth OSI layer including a codec signal; a compression unit for generating a compressed packet in which at least one the codec signal is inserted into the payload of the second layer without interposition of the third OSI layer and the fourth OSI layer by deleting the header of the third OSI layer and the header of the fourth OSI layer from the uncompressed packet; and a transmission unit for transmitting the compressed packet.