Bluetooth Low Energy Reconnection Latency Reduction
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Solution Overview
Problem
Conventional Bluetooth Low Energy (BLE) technology lacks efficient definitions for a connection procedure, leading to high latency in inter-device reconnection, which negatively impacts user experience.
Innovation Solution
A method for inter-device reconnection using Bluetooth Low Energy technology involves performing a reconnection parameter negotiation procedure, transmitting a trigger sequence with at least one trigger codeword, and receiving a beacon to establish a connection, which reduces latency by determining optimal scanning and physical layer parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If conventional Bluetooth Low Energy (BLE) connection procedure is used for device reconnection, then device reconnection can be established, but reconnection latency is high which negatively impacts user experience
Solution Approach 1:
The patent applies preliminary action by pre-negotiating connection parameters between devices before disconnection occurs. The first device stores reconnection parameters (scanning interval, beacon interval, physical layer settings) that were agreed upon during the initial connection phase. When reconnection is needed, these pre-negotiated parameters are immediately applied without requiring a full parameter negotiation process, thereby reducing reconnection latency and improving user experience.
2Reliability
If full Bluetooth connection procedure is performed for reconnection, then reliable connection can be established, but power consumption increases due to repeated parameter negotiation
Solution Approach 1:
The patent extracts and removes the parameter negotiation step from the reconnection procedure. By storing and reusing previously negotiated parameters (scanning interval, beacon interval, physical layer configuration), the system eliminates the need to repeat the full parameter negotiation process during reconnection. This extraction of the negotiation step reduces power consumption while maintaining connection reliability through the use of proven, pre-validated parameters.
Solution Approach 2:
The patent applies discarding and recovering by discarding the assumption that full parameter negotiation is needed for reconnection. Instead, the system recovers and reuses the connection parameters that were previously negotiated and stored in memory. This recovery of existing parameters reduces the energy required for reconnection while maintaining the reliability established during the initial connection phase.
3Use of energy by moving object
If simplified reconnection procedure is used, then power consumption is reduced, but connection parameters may not be optimal for current conditions
Solution Approach 1:
The patent applies preliminary action by performing parameter negotiation during the initial connection phase when devices have full context about each other and can establish optimal parameters. These pre-negotiated parameters are then stored and reused during reconnection events. This approach reduces power consumption during reconnection while maintaining adaptability because the parameters were originally optimized for the specific device pair and their operating conditions.
Data Source
AI summary
The present disclosure relates to a method and an apparatus for establishing a reconnection between devices by using Bluetooth low energy (LE). In particular, a method performed by a first device comprises the steps of: performing a reconnection parameter negotiation procedure with a second device; transmitting, via a channel determined on the basis of a result of the negotiation procedure, to the second device, a trigger sequence including at least one trigger codeword for requesting the reconnection; and receiving a beacon from the second device in response to the trigger sequence, wherein when the beacon is received, the reconnection between the first device and the second device may be established.