Out-of-band D2D Application Data Synchronization
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Solution Overview
Problem
Existing device-to-device (D2D) communication systems face inefficiencies in synchronizing application data between proximal devices, leading to unnecessary resource consumption and increased load on network infrastructure, as each device individually synchronizes data with the application server rather than utilizing more recent data available on nearby devices.
Innovation Solution
Implementing an out-of-band D2D communication method where devices broadcast and discover synchronization expressions to identify peers with more recent data, allowing for direct data synchronization over a peer-to-peer connection, thereby reducing reliance on legacy cellular or Wi-Fi links and offloading traffic from network resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each device individually synchronizes data with the application server via legacy cellular or Wi-Fi links, then data synchronization is achieved, but network resource consumption increases and backhaul congestion occurs
Solution Approach 1:
The patent introduces a D2D communication mechanism as an intermediary channel between devices. Instead of both devices communicating directly with the application server (increasing network load), the first device acts as an intermediary that already has synchronized data, allowing the second device to obtain data directly from it via D2D link, thereby reducing overall network resource consumption
Solution Approach 2:
The patent merges the synchronization function into the D2D communication framework. By combining data synchronization with the existing D2D communication infrastructure, the system eliminates redundant synchronization operations through the application server, reducing backhaul congestion while maintaining reliable data synchronization
2Loss of energy
If devices use out-of-band D2D communication for synchronization, then power consumption and resource usage are minimized, but device complexity increases
Solution Approach 1:
The patent makes the D2D communication system multi-functional by enabling it to serve both data transmission and data synchronization purposes. This universal approach eliminates the need for separate synchronization protocols, reducing overall system complexity while minimizing power consumption through efficient direct device communication
3Stability of the object's composition
If devices synchronize through the application server using legacy links, then centralized data consistency is maintained, but backhaul congestion increases
Solution Approach 1:
The patent segments the synchronization traffic into two paths: critical consistency-maintaining operations continue through the application server, while routine data exchanges are handled locally via D2D communication. This segmentation reduces backhaul congestion for routine operations while preserving centralized data consistency through selective server communication
Data Source
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AI summary
The disclosure relates to synchronizing application account data using out-of-band device-to-device (D2D) communication between peer wireless devices. More particularly, a first device may generate a local unique expression that includes a name, user credentials, and a last update time associated with an application registered for a D2D-based application synchronization service. In response to detecting one or more external unique expressions from one or more peer devices in proximity that match the name and the user credentials associated with the registered application, the first device may identify, among the one or more peer devices, an update device associated with an external unique expression having a last update time more recent than the last update time associated with the local unique expression and request an update to synchronize the application account data from the update device over an out-of-band D2D connection.