Bluetooth Low Power Design with Adaptive Burst Interval
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Solution Overview
Problem
Existing Bluetooth and Bluetooth Low Energy technologies face limitations such as limited range, data capacity, and susceptibility to interference from other devices operating in the same frequency band, particularly when transmitting data over Wi-Fi channels.
Innovation Solution
The implementation of a method for wireless communication that involves transmitting data packets to a Bluetooth-enabled peripheral device over a contention-based communication link, with adjustable transmission parameters based on feedback information such as buffer status reports and time-of-arrival data, allowing for dynamic optimization of burst rate, burst interval, and transmit power level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional Bluetooth or BLE is used for wireless communication, then power consumption is reduced through low duty cycle operation and sleep mode, but data transmission rate and latency performance deteriorate
Solution Approach 1:
The system dynamically adjusts transmission parameters including burst rate, burst interval, and transmit power level based on real-time buffer status reports and time-of-arrival information. This dynamic adaptation allows the system to optimize between power consumption and data transmission rate according to current network conditions and device state
Solution Approach 2:
The invention changes multiple transmission parameters simultaneously (burst rate, burst interval, transmit power level) to achieve optimal performance. By adjusting these parameters based on feedback information, the system can improve data transmission rate while maintaining acceptable power consumption levels, resolving the contradiction between these two objectives
2Productivity
If data transmission frequency is increased to improve data capacity throughput, then productivity improves, but power consumption increases
Solution Approach 1:
The system employs periodic data burst transmissions separated by sleep intervals. By transmitting data in controlled bursts rather than continuous streams, the system achieves improved data capacity throughput during active periods while consuming less power during intervals when the device can return to sleep mode
Solution Approach 2:
The burst interval and burst rate are dynamically adjusted based on buffer status reports and time-of-arrival information. This allows the system to increase data transmission frequency when needed to improve throughput, while reducing transmission frequency to conserve power when buffer conditions permit
3Reliability
If transmit power level is increased to extend communication range, then reliability improves, but power consumption increases
Solution Approach 1:
The transmit power level is adjusted as one of multiple transmission parameters based on feedback information including buffer status and time-of-arrival data. This allows the system to increase power only when necessary to maintain communication reliability and extend range, rather than operating at high power continuously
Solution Approach 2:
The system uses buffer status reports and time-of-arrival information as feedback to dynamically adjust transmit power level. This feedback mechanism ensures that power is increased to extend range only when communication conditions warrant it, optimizing the balance between reliability and power consumption
4Speed
If burst interval is decreased to reduce latency, then speed improves, but power consumption increases
Solution Approach 1:
The burst interval is dynamically adjusted based on time-of-arrival information and buffer status reports. This allows the system to decrease burst interval to reduce latency when performance requirements demand faster response, while increasing burst interval to conserve power when latency requirements are less stringent
Solution Approach 2:
The system changes the burst interval parameter in conjunction with other transmission parameters (burst rate, transmit power level) to achieve optimal latency performance. By coordinating changes across multiple parameters, the system can reduce latency through shorter burst intervals while mitigating the associated power consumption increase
Data Source
AI summary
This disclosure describes techniques for transmitting Bluetooth data over a contention-based communication link (such as a P2P link). In some instances, a wireless device transmits, to a Bluetooth-enabled peripheral device over the contention-based communication link, one or more first data packets based on a set of transmission parameters. The wireless device receives, from the Bluetooth-enabled peripheral device, a buffer status report carrying feedback information indicating one or more of a quantity of data packets queued in a receive buffer of the peripheral device, a rate at which the data packets are queued in the receive buffer, or time-of-arrival (TOA) information of the data packets queued in the receive buffer. The wireless device adjusts the set of transmission parameters based on the feedback information, and transmits, to the Bluetooth-enabled peripheral device over the contention-based communication link, one or more second data packets based on the adjusted set of transmission parameters.