Bluetooth Handover Address Transfer for Seamless Roaming
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Solution Overview
Problem
Existing network handover procedures in Bluetooth devices require pre-configuration of the same network address across all devices, leading to scalability issues and potential connection loss during handovers.
Innovation Solution
A method for seamless handover between Bluetooth devices without requiring pre-configured same network addresses, involving the transfer of network addresses and connection parameters between devices, maintaining separate data bases for each connection, and managing anchor point timings to ensure continuous communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pre-configuration of the same network address across all devices is used, then handover can be initiated, but scalability is limited and connection loss may occur during handovers
Solution Approach 1:
The patent segments the network address management by introducing a temporary network address (LAN address) that is separate from the permanent network address (MAC address). This segmentation allows the permanent address to remain unique and scalable across devices, while the temporary address provides a consistent identifier during handover operations, thus resolving the contradiction between connection continuity and scalability
Solution Approach 2:
The patent introduces a temporary network address as an intermediary between the source and destination network devices during handover. This intermediary address allows the user device to maintain continuous communication without directly exposing or relying on the permanent MAC addresses, enabling seamless handover while preserving the scalability of unique permanent addresses across the network
2Adaptability or versatility
If seamless handover without pre-configured same network addresses is implemented, then scalability is improved, but connection parameters and anchor point timings must be transferred and managed
Solution Approach 1:
The patent applies preliminary action by pre-establishing the temporary network address association between the user device and the destination network device before the actual handover occurs. The handover message includes the temporary address and necessary connection parameters in advance, allowing the destination device to be prepared and reduce the complexity of real-time parameter transfer during handover execution
Solution Approach 2:
The patent uses copying by transferring connection parameters and anchor point timings from the source network device to the destination network device through the handover message. This copying mechanism allows the destination device to replicate the necessary connection state without requiring complex real-time synchronization, thus managing complexity while maintaining scalability
3Adaptability or versatility
If the user device roams between multiple controllers, then network mobility is improved, but connection loss may occur without proper handover management
Solution Approach 1:
The patent ensures continuity of useful action by maintaining the temporary network address association throughout the handover process. The user device continues to communicate using the same temporary address when switching between controllers, ensuring uninterrupted service and maintaining connection stability while enabling network mobility
Data Source
AI summary
One example discloses a network destination device: wherein the network destination device is configured to receive a handover message from a network source device; wherein the network source device is identified by a first network address; wherein the network destination device is identified by a second network address; wherein the handover message is configured to initiate a transfer of a user device from the network source device to the network destination device; wherein the network destination device is configured to communicate with the user device using both the first network address and the second network address.