Bluetooth CIS Link Adjustment for Uninterrupted Service Switching
Find Innovative SolutionsGenerate Solutions
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 incomplete or delayed data transfer.
Innovation Solution
A method and device for adjusting CIS links using adjustment parameters sent by a Bluetooth master device to both master and slave devices, allowing seamless transitions without disconnecting the link, ensuring data continuity during service changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the CIS link is disconnected and re-established when service changes, then the CIS link can be adjusted to match new service requirements, but data transmission is interrupted during the disconnection and re-establishment process
Solution Approach 1:
The patent implements dynamic adjustment of CIS link parameters (such as transmission rate, packet length, and timing) during runtime without disconnecting the link. The master device sends adjustment parameters to the slave device, and both devices dynamically modify their transmission characteristics to adapt to new service requirements while maintaining continuous data transmission.
Solution Approach 2:
The patent changes physical and operational parameters of the CIS link (transmission rate, packet length, timing synchronization) to adapt to different service requirements. By modifying these parameters dynamically rather than disconnecting and reconnecting, the system maintains data transmission continuity while achieving service adaptability.
2Adaptability or versatility
If the CIS link is disconnected and re-established when service changes, then the CIS link can be adjusted to match new service requirements, but data transmission timeliness deteriorates due to interruption
Solution Approach 1:
The master device prepares and sends link adjustment parameters to the slave device in advance before service changes take effect. This preliminary action allows both devices to synchronize their parameter changes simultaneously, avoiding transmission interruptions and ensuring timely adaptation to new service requirements.
Solution Approach 2:
The system enables dynamic parameter adjustment during active data transmission, allowing the CIS link to adapt to new services in real-time without interruption. This dynamic approach eliminates the time loss associated with disconnecting and reconnecting links.
3Reliability
If both master and slave devices adjust the CIS link dynamically, then the link can be optimized for new services without disconnection, but the device complexity increases due to coordination requirements
Solution Approach 1:
The master device acts as an intermediary that generates and manages the link adjustment parameters, then transmits them to the slave device. This centralized parameter management simplifies the coordination complexity by having one device (master) responsible for determining and distributing the adjustment parameters, while the slave device simply applies them.
Data Source
AI summary
A connected isochronous stream (CIS) link adjustment method is provided and 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 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.