Multi-rate overlay mode for wireless communication throughput
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Solution Overview
Problem
Legacy IEEE Standard 802.15.4 protocol for wireless personal area networks (WPANs) faces limitations in data transfer rates and power consumption, leading to low throughput and increased power usage due to small PHY protocol data unit (PPDU) size and slow data rates, which are inadequate for advanced applications.
Innovation Solution
A multi-rate overlay extension mode is introduced, allowing nodes to select from various data rates, including faster and slower rates than the legacy rate, using non-legacy frame structures with distinct headers and modulation schemes, while maintaining compatibility with the legacy protocol to enhance data transfer efficiency and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If legacy IEEE 802.15.4 protocol is used, then power consumption is reduced and device compatibility is maintained, but data transfer rate is limited and throughput is low
Solution Approach 1:
The patent implements dynamic data rate adaptation by allowing wireless devices to switch between legacy data rates and enhanced data rates based on communication conditions. The system dynamically selects the appropriate data rate mode (legacy or enhanced) depending on whether the communicating device supports the multi-rate overlay mode, thereby optimizing both speed and power consumption for different scenarios.
Solution Approach 2:
The patent changes the data rate parameter by introducing multiple data rate options (legacy and enhanced rates) within the same wireless communication framework. By modifying the data rate parameter based on device capabilities and communication requirements, the system achieves higher speeds when needed while maintaining power efficiency for legacy device compatibility.
2Productivity
If legacy modulation scheme is used, then compatibility with existing devices is maintained, but data transfer efficiency is limited
Solution Approach 1:
The patent segments the communication protocol into two distinct modes: legacy mode using traditional IEEE 802.15.4 modulation schemes for compatibility, and enhanced mode using improved modulation schemes for higher efficiency. The system selectively applies the appropriate mode based on device capabilities, thereby achieving both compatibility and improved productivity simultaneously.
Solution Approach 2:
The patent creates a universal communication framework that supports multiple data rate modes within a single protocol overlay. The multi-rate overlay mode enables the system to function with both legacy and enhanced devices, providing multi-functionality that adapts to different device types while maintaining a unified communication approach.
3Productivity
If small PHY protocol data unit size is used, then power consumption is reduced, but fragmentation overhead increases and throughput decreases
Solution Approach 1:
The patent dynamically adjusts the PHY protocol data unit size based on the selected data rate mode. When enhanced data rates are used, larger PPDU sizes are permitted, reducing fragmentation overhead and improving throughput. When legacy modes are used, the system maintains appropriate PPDU size limitations, balancing throughput requirements with power consumption constraints for different operational scenarios.
Data Source
AI summary
A method performed by a first wireless communication device is provided, which includes exchanging rate information with a second wireless communication device in response to a determination that the second wireless communication device is configured with the multi-rate extension mechanism, wherein the first and second wireless communication devices support two or more different data transfer rates that are faster or slower than a legacy data transfer rate specified by the legacy protocol; determining an appropriate data transfer rate based on the rate information and link quality information regarding a communication link between the first and second wireless communication devices; and communicating the appropriate data transfer rate to the second wireless communication device, wherein the appropriate data transfer rate is utilized during communication between the first and second wireless communication devices.