Stateless Offline Dictionary Compression for Low-Latency Wireless Paths
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Solution Overview
Problem
Non-traditional wireless network deployments in environments like mines and warehouses face challenges such as signal degradation, blockage, and interference due to metal presence and dynamic node movements, leading to potential interruptions in controlled processes.
Innovation Solution
A mobile node with multiple radios applies stateless offline dictionary compression to packet streams, sending uncompressed streams over one wireless path and compressed streams over others to ensure ultra-reliable and low-latency communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If packet compression is applied to reduce airtime usage, then airtime consumption is reduced and collisions are minimized, but processing time increases and latency may worsen
Solution Approach 1:
The system performs compression in advance before transmission, using pre-configured compression parameters and dictionaries. The mobile node compresses packets at the source before sending them through the wireless channel, reducing airtime without requiring compression during critical transmission moments, thus minimizing latency impact.
Solution Approach 2:
The patent applies different quality levels of compression to different packet types and transmission conditions. Not all packets are compressed uniformly - the system selectively applies compression based on packet importance, data type, and current network conditions, optimizing the balance between compression benefits and processing overhead.
2Reliability
If multiple wireless paths are used for redundancy, then communication reliability is improved, but system complexity and collision probability increase
Solution Approach 1:
The system segments packet transmission across multiple wireless paths by separating compression and decompression operations. Different paths can carry compressed or uncompressed packets based on their reliability characteristics, allowing the system to manage complexity through structured division of transmission tasks rather than treating all paths uniformly.
3Productivity
If compression is applied to all packets, then airtime efficiency improves, but processing overhead and latency increase
Solution Approach 1:
Instead of compressing all packets uniformly, the system applies compression selectively to a subset of packets based on their characteristics and transmission requirements. This partial compression approach reduces processing overhead while still achieving significant airtime efficiency improvements for the most beneficial packet types.
Data Source
AI summary
In one embodiment, a mobile node having a first radio and a second radio applies stateless offline dictionary compression to an uncompressed stream of packets, to form a compressed stream of packets. The first radio of the mobile node communicates with a first access point of a wireless network and the second radio of the mobile node communicates with a second access point of the wireless network. The mobile node selects the first radio to send the uncompressed stream of packets and the second radio to send the compressed stream of packets. The mobile node sends, via the first radio, the uncompressed stream of packets to the first access point over a first wireless path. The mobile node sends, via the second radio, the compressed stream of packets to the second access point over a second wireless path.