Bluetooth CIS Link Adjustment for Uninterrupted Service Switching
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Solution Overview
Problem
In Bluetooth communication, the process of changing a connected isochronous stream (CIS) link to match a new data transmission service results in data transmission interruptions due to disconnection and re-establishment, leading to inefficiencies.
Innovation Solution
A method and device for adjusting the CIS link using parameters generated by a Bluetooth master device, allowing both master and slave devices to synchronize adjustments without disconnecting the link, ensuring seamless transitions based on target service requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the CIS link is disconnected and re-established to match a new data transmission service, then the CIS link can be adjusted to match the target service, but data transmission is interrupted during the adjustment process
Solution Approach 1:
The patent applies dynamics by enabling the CIS link to be dynamically adjusted without disconnection. The master device and slave device can modify link parameters (such as transmission rate, packet length, timing) in real-time based on service requirements, allowing the link to adapt to different services while maintaining continuous data transmission. This resolves the contradiction by making the link flexible and adaptable without requiring interruption.
Solution Approach 2:
The patent utilizes parameter changes by allowing modification of CIS link parameters (transmission rate, packet length, timing synchronization, frequency) to match different service requirements. Instead of disconnecting and re-establishing the link, the system changes the operational parameters of the existing link to adapt to the target service, thereby maintaining transmission continuity while achieving service adaptability.
2Adaptability or versatility
If the CIS link is disconnected and re-established for service changes, then the link can be optimized for the new service, but data transmission efficiency decreases due to interruption
Solution Approach 1:
The patent implements continuity of useful action by ensuring that data transmission continues uninterrupted during CIS link adjustment. The master device sends adjustment parameters to the slave device, and both devices coordinate to modify link characteristics while maintaining active data transmission. This eliminates idle time and reconnection delays, preserving transmission efficiency while achieving service optimization.
Solution Approach 2:
The patent applies preliminary action by having the master device generate and send adjustment parameters to the slave device before the actual service change takes effect. The slave device prepares for the transition by receiving and processing these parameters in advance, allowing smooth parameter modification without interrupting the data flow, thus maintaining high transmission efficiency during service transitions.
3Reliability
If the CIS link adjustment parameters are transmitted during service data transmission, then the link can be adjusted without affecting service data transmission, but coordination between master and slave devices is required
Solution Approach 1:
The patent utilizes feedback by implementing an acknowledgment mechanism where the slave device confirms receipt of adjustment parameters to the master device. This feedback loop ensures both devices are synchronized on the parameter changes, coordinating their actions without requiring complex communication protocols. The feedback mechanism maintains transmission reliability by ensuring both ends are aligned on the adjustment timing and parameters.
Solution Approach 2:
The patent applies the intermediary principle by using adjustment parameters as a mediator between the master device's service change decision and the slave device's link configuration. These parameters serve as a standardized interface that enables coordinated adjustment without requiring direct complex negotiation between devices, simplifying the coordination mechanism while ensuring reliable synchronized changes.
Data Source
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AI summary
A CIS link adjustment method is provided, which is used to adjust a CIS link based on a target service, so that data transmission is not interrupted in a link adjustment process, to improve smoothness and reliability of the data transmission. The method in embodiments of this application includes: On a basis of transmitting data with a Bluetooth slave device on the CIS link, a Bluetooth master device generates a CIS link adjustment parameter for the Bluetooth slave device based on the target service, and sends, to the Bluetooth slave device, a link update message including the CIS link adjustment parameter. The Bluetooth master device and the Bluetooth slave device adjust the CIS link based on the CIS link adjustment parameter, to transmit data of the target service on an adjusted CIS link.