Compressed Layer 2 Header for Reliable NTN Voice Transmission
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Solution Overview
Problem
Non-terrestrial networks (NTN) experience longer delays and lower throughput, leading to unreliable voice services due to the larger coverage area, which conventional L2 headers fail to enhance.
Innovation Solution
Introduce a compressed L2 header format, reducing the standard 6-byte header to 2- or 3-byte formats for improved voice service transmission in NTN, specifically designed for voice calls in low signal-to-noise ratio conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional L2 headers are used in NTN, then standard protocol compatibility is maintained, but voice service reliability deteriorates due to longer delays and lower throughput
Solution Approach 1:
The patent extracts and removes unnecessary fields from the conventional L2 header structure, retaining only the essential information needed for voice packet transmission. This simplification reduces header overhead and processing time, directly addressing the transmission delay issue in NTN while maintaining voice service reliability.
Solution Approach 2:
The patent changes the parameter structure of the L2 header by reducing the number of bytes from the standard 6-byte format to a compressed format with fewer fields. This parameter change optimizes the header for voice-specific requirements, reducing overhead and improving transmission efficiency in NTN environments with longer delays.
2Productivity
If standard 6-byte L2 headers are used, then full protocol functionality is maintained, but protocol overhead increases reducing throughput
Solution Approach 1:
The patent extracts only the necessary header fields required for voice packet identification and routing, removing redundant information present in standard L2 headers. This extraction reduces the header size from 6 bytes to a compressed format, decreasing protocol overhead and increasing effective throughput for voice services in NTN.
Solution Approach 2:
The patent applies partial action by implementing a compressed header format that includes only the essential subset of fields needed for voice communication, rather than using the complete standard header structure. This partial implementation reduces overhead sufficiently to improve throughput while maintaining adequate functionality for voice services.
3Productivity
If compressed L2 header is used, then protocol overhead is reduced improving throughput, but device complexity increases due to capability reporting and indication signaling
Solution Approach 1:
The patent applies preliminary action by having the UE report its compressed header support capability during the initial connection establishment or capability exchange phase. This advance reporting allows the network to configure the appropriate header format before voice service activation, avoiding the need for complex real-time negotiations and reducing operational complexity.
Solution Approach 2:
The patent implements a universal capability indication mechanism where a single capability report field indicates support for compressed L2 headers. This multi-functional indication covers both transmission and reception capabilities, simplifying the signaling process while enabling the network to configure appropriate header formats for bidirectional voice communication.
Data Source
AI summary
A user equipment (UE) configured to report a VE capability indicating the UE supports a compressed layer 2 (L2) header and receive, from a base station, an indication that the UE is to transmit one or more packets using the compressed L2 header or receive one or more packets with the compressed L2 header.