Hierarchical Preamble Sequence for Piconet Discrimination
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Solution Overview
Problem
Current wireless personal area networks face challenges in distinguishing between piconets using existing preamble sequences, particularly in scenarios where piconets share the same frequency band, leading to increased complexity and power consumption in receivers.
Innovation Solution
The implementation of a 128-length preamble sequence formed by combining a 16-length and an 8-length bi-phase valued sequence, which is scalable and hierarchical, allowing for efficient discrimination between piconets using fixed frequency interleaving, thereby reducing the need for high-quality filters and lowering manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing preamble sequences are used to distinguish piconets, then piconet discrimination is possible, but receiver complexity and power consumption increase when piconets share the same frequency band
Solution Approach 1:
The preamble sequence is segmented into multiple distinct components: a primary preamble sequence for basic piconet identification and additional hierarchical preamble sequences for further discrimination. This segmentation allows receivers to process piconet identification in stages, reducing overall receiver complexity while maintaining accurate discrimination capability.
Solution Approach 2:
The patent introduces an additional dimension to piconet discrimination by using hierarchical preamble sequences that operate at multiple levels. Instead of relying solely on single-dimension frequency or time separation, the system adds a preamble sequence dimension with hierarchical structure, enabling efficient discrimination without increasing receiver complexity.
2Adaptability or versatility
If additional preamble sequences are implemented for FDMA channel support, then piconet discrimination capability improves, but the system complexity increases
Solution Approach 1:
The patent implements a nested hierarchical structure where primary preamble sequences are nested within additional hierarchical preamble sequences. This nested organization allows the system to support multiple piconets with improved discrimination capability while managing system complexity through a structured, layered approach to preamble sequence implementation.
3Reliability
If high-quality filters are used to separate piconet signals, then signal separation improves, but manufacturing costs increase
Solution Approach 1:
The patent replaces the mechanical/filter-based signal separation approach with a signal processing-based approach using hierarchical preamble sequences. Instead of relying on high-quality physical filters for signal separation, the system uses coded preamble sequences that enable discrimination through correlation processing, significantly reducing manufacturing costs while maintaining reliable signal separation.
Data Source
AI summary
A wireless device 10, 12 that distinguishes between multiple piconets is provided. The wireless device 10, 12 includes a preamble component operable to provide a preamble for a wireless fixed frequency interleaving transmission. The wireless device 10, 12 also includes a correlator component operable to distinguish a wireless transmission based on the preamble. The preamble is based on a 128-length sequence 120, 136, 144, formed using a 16-length sequence and a 8-length sequence. The 16-length sequence is selected from the group consisting of a first 16-length sequence 110, a second 16-length sequence 132, and a third 16-length sequence 140. The 8-length sequence is selected from the group consisting of a first 8-length sequence 112, a second 8-length sequence 134, and a third 8-length sequence 144.