Network-Assisted Proximity Detection for Direct Device-to-Device Links
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Solution Overview
Problem
Traditional wireless networks face inefficiencies in peer-to-peer communication between mobile devices, as they require data to traverse the core network, leading to increased utilization of radio access and core network entities, excessive bandwidth consumption, and scalability issues with conventional peer discovery mechanisms.
Innovation Solution
A network-assisted peer-to-peer discovery method that uses network elements to detect proximity and signal reception quality between mobile devices, enabling direct device-to-device communication by generating capability messages and notification messages, allowing mobiles to establish direct links without relying on conventional infrastructure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data travels through the core network for peer-to-peer communication, then network control and management are maintained, but network load and bandwidth consumption increase
Solution Approach 1:
The patent extracts the data transmission path from the core network for peer-to-peer communications. Mobile devices establish direct connections with each other, bypassing the core network infrastructure. The network element only maintains control by detecting proximity and generating capability messages, while actual data exchange occurs directly between devices, reducing core network load and bandwidth consumption.
Solution Approach 2:
The patent introduces a network element as an intermediary that facilitates peer-to-peer discovery without being part of the data transmission path. The network element detects proximity between mobiles, generates capability messages, and enables direct connections, but does not route the actual communication data, thus maintaining control while minimizing bandwidth consumption.
2Ease of operation
If conventional peer discovery mechanisms are used, then mobile devices can discover each other, but scalability issues arise and network resources are excessively utilized
Solution Approach 1:
The patent enables mobile devices to perform self-discovery by measuring signal reception qualities of each other directly. Devices autonomously determine their proximity and capability to establish direct links without extensive network intervention. The network element only provides minimal assistance by generating capability messages based on measurements, significantly improving scalability compared to conventional network-assisted discovery mechanisms.
3Productivity
If direct device-to-device links are established, then network load is reduced and throughput increases, but device proximity detection and capability verification become more complex
Solution Approach 1:
The patent uses a network element as an intermediary to manage the complexity of proximity detection and capability verification. The network element receives measurement instructions from mobiles, collects signal reception quality data, and generates capability messages. This centralizes the complex detection logic in the network element, keeping mobile devices simple while enabling direct high-throughput connections.
Solution Approach 2:
The patent performs preliminary proximity detection and capability verification through signal reception quality measurements before establishing direct device-to-device links. The network element generates capability messages in advance that indicate whether devices can successfully communicate directly. This preliminary action ensures that direct links are only established when conditions are favorable, simplifying the overall process while maintaining high throughput.
Data Source
AI summary
A method of providing peer to peer discovery for a plurality of mobiles on a communications network, the plurality of mobiles including at least a first mobile and a second mobile, includes detecting, at a network element, that the first and second mobiles are in proximity with respect to one another; generating a determination result at the network element after the detecting, the determination result indicating whether the first and second mobiles are capable of establishing a direct device to device (D2D) link with one another based on signal reception qualities of the first and second mobiles; and generating a D2D capability message at the network element based on the determination result, the D2D capability message indicating that the first and second mobiles are capable of establishing a D2D link with one another.