Multi-Link Call Routing for Bluetooth Call Quality Drops
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Solution Overview
Problem
Bluetooth connections between mobile phones and electronic devices, such as smart watches, experience deteriorating call quality, leading to increased packet loss, jitter, and latency, resulting in poor call quality or interruptions.
Innovation Solution
Implement a call system with a host and extension that utilize multiple terminal side links, including pre-established or newly established communication links, to switch data packets when quality thresholds are met, and manage link quality to maintain optimal communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single Bluetooth link is used for call data transmission between host and extension, then device complexity is reduced, but call quality deteriorates due to packet loss, jitter, and latency
Solution Approach 1:
The patent divides the communication path into multiple terminal side links between host and extension. Instead of relying on a single Bluetooth link, the system establishes alternative communication paths (e.g., Wi-Fi link, data service link) so that call data packets can be transmitted through different routes, reducing the impact of packet loss and jitter on any single link.
Solution Approach 2:
The patent dynamically changes communication parameters by switching between different types of terminal side links based on call quality conditions. When Bluetooth link quality deteriorates, the system transitions to using Wi-Fi or data service links, effectively changing the transmission medium parameters to maintain call quality.
2Reliability
If multiple terminal side links are established and maintained for quality assurance, then call quality is improved, but device complexity and resource consumption increase
Solution Approach 1:
The patent implements dynamic link selection where the system continuously monitors call quality conditions and adaptively switches between terminal side links. Instead of maintaining all links simultaneously, the system activates alternative links (Wi-Fi, data service) only when the primary Bluetooth link quality deteriorates below a threshold, thereby reducing unnecessary resource consumption while ensuring call quality.
Solution Approach 2:
The patent employs a feedback mechanism where the system monitors call quality parameters (packet loss, jitter, latency) in real-time and uses this feedback to determine when to switch between terminal side links. This closed-loop control ensures that multiple links are only activated when necessary, optimizing resource usage while maintaining call quality.
3Speed
If alternative terminal side links are pre-established, then switching speed is improved when quality deteriorates, but device complexity increases
Solution Approach 1:
The patent performs preliminary actions by pre-establishing alternative terminal side links (Wi-Fi link, data service link) between host and extension before call quality deterioration occurs. These alternative links are prepared in advance with necessary connection parameters and protocols, enabling immediate switching when Bluetooth link quality falls below the threshold, thus achieving fast link switching without complex real-time negotiation.
Data Source
AI summary
Embodiments of this application relate to a call system, an extension, and a host in the field of communication technologies. An example call system includes a host and an extension. A network side device and the host are connected through a network side link, and the host and the extension are connected through a first terminal side link. The extension exchanges a call data packet with the network side device through the first terminal side link and the network side link. The extension and the host transmit the call data packet through a second terminal side link in response to determining that call quality of the extension is lower than a quality threshold. The first terminal side link is different from the second terminal side link.