Sub-1 GHz Frame Format Selection for Bandwidth Adaptation

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Solution Overview

Problem

Current wireless communication systems operating at sub-1 GHz frequencies face challenges in efficiently controlling message characteristics such as modulation and coding schemes, frame formats, and tone scaling across varying bandwidths and spatial streams, which affects data transmission reliability and efficiency.

Innovation Solution

The implementation of a system that selects and manages modulation and coding schemes, frame formats, and tone scaling parameters based on specific bandwidths and spatial streams in sub-1 GHz wireless networks, using data structures and processors to generate and decode packets effectively, ensuring standardized message characteristics for reliable communication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If frame formats and timing parameters are standardized for sub-1 GHz networks, then communication reliability is improved, but adaptability to different bandwidths and spatial streams is reduced

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidadaptability to different bandwidths and spatial streams

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent implements dynamic frame format selection where the system can switch between short and long frame formats based on the specific bandwidth and spatial stream configuration. This dynamic adaptation allows the standardized system to maintain reliability while accommodating varying network conditions and device requirements.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent establishes specific parameter relationships between frame formats and bandwidths (e.g., short format for 1 MHz, long format for greater than 1 MHz). By defining clear parameter change rules, the system maintains standardization benefits while enabling appropriate adaptation to different operating conditions through controlled parameter variations.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If multiple frame formats are supported for different bandwidths, then adaptability is improved, but device complexity increases

Engineering Contradiction:

Improvesupport for multiple bandwidths and spatial streamsVSAvoidcomplexity of managing frame formats and timing parameters

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent assigns specific frame formats to specific bandwidth ranges (short format for 1 MHz, long format for greater than 1 MHz). This local quality approach ensures that each bandwidth scenario has an optimized, pre-defined frame format, reducing the complexity of real-time decisions while maintaining adaptability across different operating conditions.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent pre-establishes the relationships between frame formats, bandwidths, and timing parameters before operation. By determining appropriate frame formats and timing parameters in advance based on bandwidth detection, the system avoids complex real-time calculations and simplifies the operational complexity of managing multiple formats.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS9055468B2Frame formats and timing parameters in sub-1 GHz networks

Publication Date: 2015.06.09 QUALCOMM INC

AI summary

Systems and methods of controlling characteristics of messages in sub-1 GHz networks (e.g., IEEE 802.11ah networks) are disclosed. One or more data structures indicating available frame formats and/or timing parameters may be stored at or accessible to transmitters and receivers. The data structures may be organized based on a frame format, a wireless network bandwidth, and/or the number of spatial streams in use at the wireless network. Information stored in the data structures may be used in generation and processing of messages communicated via the sub-1 GHz network.