Wireless Arbiter Power Saving with Dynamic Arbitration Rules
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Solution Overview
Problem
Bluetooth and Wi-Fi devices operating in the same 2.4 GHz frequency band often interfere with each other due to overlapping frequencies, leading to potential link disruptions when one device enters power-save mode, as the Bluetooth link may be dropped or disrupted upon waking.
Innovation Solution
A circuit and method that provide a media access grant to the Bluetooth component before entering power-save mode and apply different arbitration rules upon waking to determine if the Bluetooth component is active, ensuring fair and non-concurrent access to the antenna, thus preventing link disruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the arbiter enters power-save mode to reduce energy consumption, then power saving is improved, but the Bluetooth link may be disrupted when the arbiter wakes up
Solution Approach 1:
The arbiter applies preliminary arbitration rules before entering power-save mode to determine the state of the second wireless component (e.g., Bluetooth). Based on this preliminary assessment, the arbiter sets appropriate arbitration rules that will be applied upon waking, ensuring that the Bluetooth link is maintained or properly re-established without disruption when the arbiter returns from power-save mode.
Solution Approach 2:
The system dynamically adjusts arbitration rules based on the operational state of wireless components. The arbiter transitions between different arbitration rule sets depending on whether the second component is active or inactive, allowing flexible adaptation to power-save conditions while maintaining link reliability.
2Reliability
If the arbiter continuously monitors all wireless components to maintain link integrity, then reliability is improved, but energy consumption increases
Solution Approach 1:
The arbiter performs preliminary monitoring and state determination before entering power-save mode. This preliminary action captures the necessary information about the second wireless component's state, allowing the arbiter to suspend monitoring during power-save mode without losing critical link integrity information.
Solution Approach 2:
The system uses the preliminary state information to automatically determine appropriate arbitration rules upon waking, without requiring continuous active monitoring. The arbiter effectively serves itself by applying pre-determined rules based on previously gathered information, reducing the need for continuous energy-consuming monitoring.
3Reliability
If different arbitration rules are applied upon waking based on component activity state, then link disruption is prevented, but arbitration rule complexity increases
Solution Approach 1:
The arbitration rules are segmented into distinct sets: one set for when the second wireless component is active and another set for when it is inactive. This segmentation allows the arbiter to apply the appropriate rule set based on the component's state, providing clear and manageable rule complexity while ensuring link stability.
Solution Approach 2:
The arbiter determines the component's state in advance and selects the appropriate arbitration rule set accordingly. This preliminary determination simplifies the complexity by pre-categorizing the operational state, making the rule selection process straightforward rather than requiring complex real-time analysis upon waking.
Data Source
AI summary
A circuit processes requests to access an antenna, the requests from a plurality of wireless communication protocols components including (i) a first wireless communication protocol component and (ii) a second wireless communication protocol component. The circuit causes a switch to provide the second wireless communication component with access to the antenna while the circuit is in a power saving mode of operation, and, upon the circuit exiting the power saving mode of operation, determines whether the second wireless communication component is utilizing the antenna. The circuit, upon the circuit exiting the power saving mode of operation, applies a first set of arbitration rules when it is determined that the second wireless communication component is utilizing the antenna, and, upon the circuit exiting the power saving mode of operation, applies a second set of arbitration rules when it is determined that the second wireless communication component is not utilizing the antenna.