Interleaved Telegram Transfer for Variable-Length Packet Decoding
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Solution Overview
Problem
Existing data transmission methods face challenges in reliably decoding data packets due to interference, especially when channel-coding is applied to variable-length data, as interleaving scatters information across packets, making it difficult to analyze and decode without complete packet reception.
Innovation Solution
A data transmission system that encodes and interleaves core and extension data into sub-packets using time and frequency hopping patterns, where core data is distributed across multiple sub-packets to ensure decoding even with packet loss, and extension data is interleaved to enhance reliability, allowing for variable packet lengths and improved error protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If symbols are interleaved after channel-coding to protect against interference, then reliability of data transmission is improved, but the ability to decode variable-length data is worsened because information is scattered across the entire telegram
Solution Approach 1:
The patent divides the interleaved data stream into multiple sub-packets, each containing a portion of the channel-coded and interleaved symbols. This segmentation allows the receiver to process and decode data in manageable units while maintaining the interleaving benefits. The length field in each sub-packet enables independent decoding without requiring the entire telegram, thus resolving the contradiction between reliability through interleaving and ease of decoding variable-length data.
2Adaptability or versatility
If the length field is placed in front of the channel-coded data, then variable number of sub-packets can be received, but the length field alone is not part of channel-coding and total loss occurs if the sub-packet with length information is not received
Solution Approach 1:
The patent embeds the length field within the channel-coded data stream rather than placing it separately at the beginning. This preliminary encoding of the length information ensures it is protected by the channel code and interleaving, allowing the receiver to reliably determine the number of sub-packets even if some sub-packets are lost or corrupted. This resolves the contradiction by making the length information as reliable as the rest of the data.
3Reliability
If telegram splitting is used to distribute data across multiple sub-packets, then interference resistance is improved, but device complexity increases due to additional encoding and interleaving steps
Solution Approach 1:
The patent combines the channel coding and interleaving operations into a unified process applied to the entire telegram including the length field. By merging these operations, the system achieves interference resistance across all sub-packets while reducing overall complexity compared to applying separate encoding and interleaving steps. The combined approach maintains reliability while simplifying the transmitter and receiver architecture.
Data Source
AI summary
Embodiments provide a transfer method for wirelessly transferring data in a communication system (e.g. a sensor network or telemetry system). The data includes core data and extension data, wherein the core data is encoded and distributed in an interleaved manner to a plurality of core sub-data packets, wherein the extension data is encoded and distributed in an interleaved manner to a plurality of extension sub-data packets, wherein at least a part of the core data contained in the core sub-data packets is needed for receiving the extension data or extension data packets.