RTP Header Compression for Low-Rate Non-Terrestrial Links
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Solution Overview
Problem
Existing wireless communication systems over non-terrestrial networks face high transmission overhead due to the inclusion of real-time transport protocol (RTP) headers, which can reduce data transmission efficiency, especially in low-data-rate environments.
Innovation Solution
Implementing RTP header compression techniques to exclude or compress RTP header fields in RTP packets, generating new packets with only essential header fields to reduce transmission overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RTP headers are included in packets for non-terrestrial network transmission, then packet integrity and protocol compliance are maintained, but transmission overhead increases and data transmission efficiency decreases
Solution Approach 1:
The patent extracts and removes unnecessary RTP header fields from packets transmitted over non-terrestrial networks. Specifically, it excludes fields such as contribution count, extension indication, and other optional headers that are not required for proper packet processing in satellite communications, thereby reducing overhead while maintaining essential packet integrity
Solution Approach 2:
The patent modifies the RTP header structure by changing which fields are included or excluded based on the transmission medium. For non-terrestrial networks, the header is modified to include only essential fields (version, padding, extension, contribution count) while omitting optional fields, adapting the header parameters to the specific requirements of satellite communication environments
2Adaptability or versatility
If full RTP headers are transmitted, then protocol compatibility is maintained, but bandwidth consumption increases in low data rate environments
Solution Approach 1:
The patent applies different header compression strategies to different transmission contexts. For non-terrestrial networks with low data rates, it uses a simplified header format with only essential fields. For terrestrial networks or when full compatibility is required, it transmits complete headers. This local adaptation optimizes bandwidth usage while maintaining protocol compatibility where needed
Solution Approach 2:
The patent transmits only the necessary portion of RTP headers (partial action) rather than always transmitting complete headers. By including only essential fields such as version, padding indication, extension indication, and contribution count, it reduces bandwidth consumption while providing sufficient information for proper packet processing in low data rate environments
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Techniques described provide for real-time transport protocol (RTP) header compression for transport over a non-terrestrial network (NTN). In some examples, a first network entity may receive, from a second network entity supported by the NTN, a first RTP packet comprising an audio payload associated with the second network entity, where the first RTP packet excludes one or more RTP header fields associated with an RTP packet generation protocol. The network entity may generate at least one RTP header field of the RTP header fields excluded from the first RTP packet. The first network entity may output, to a third network entity or to an upper layer RTP stack of the first network entity, a second RTP packet including the audio payload associated with the second network entity and the at least one RTP header field generated by the first network entity.