D2D Path Switching via Network ID Correlation
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Solution Overview
Problem
In wireless communication systems supporting device-to-device (D2D) communication, there is a need to adaptively switch between direct and local communication paths to optimize network efficiency, as direct paths are inefficient when devices are far apart and can cause unnecessary network traffic, while local paths without network passage are more efficient but require ID correlation management.
Innovation Solution
A method and apparatus for a base station to switch between direct and local paths by receiving measurement reports from terminals, querying a D2D server for network IDs corresponding to D2D IDs, and determining path switches based on these IDs, using D2D IDs for direct communication and network IDs for local communication, with RRC connection re-configuration messages for path switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If devices perform D2D communication via direct path, then wireless resource efficiency is improved and overall network throughput is increased, but when devices are far apart, wireless channel performance deteriorates and D2D communication becomes inefficient
Solution Approach 1:
The system dynamically switches between direct path and local path based on real-time channel conditions. When channel quality is good, direct path is used for high throughput; when channel quality deteriorates, the system transitions to local path through eNB relay to maintain reliable communication.
2Reliability
If devices communicate via default cellular network path, then communication reliability is maintained, but unnecessary network traffic increases and network efficiency deteriorates
Solution Approach 1:
The eNB acts as an intermediary for local path communication, relaying data packets between D2D devices without routing them through the core network. This maintains communication reliability through network-controlled relay while improving network efficiency by localizing traffic.
3Productivity
If local path is used for D2D communication, then network traffic is reduced and communication efficiency is improved, but ID correlation management complexity increases
Solution Approach 1:
The system automatically performs ID correlation management through measurement reports and network queries. Devices self-report their D2D IDs and channel conditions, and the eNB automatically correlates these with network IDs and manages path switching without manual intervention.
Data Source
AI summary
The present invention relates to a method and an apparatus for switching a data path in a wireless communication system supporting device-to-device (D2D) communication. The method for switching a path of a base station in a wireless communication system supporting device-to-device communication, according to the present invention, comprises the steps of: receiving, from a first terminal, a measurement report including a D2D identifier of a second terminal that performs a direct communication with the first terminal; sending a query to a D2D server for a network identifier corresponding to the D2D identifier of the second terminal; and determining whether to switch a direct path between the first terminal and the second terminal to a local path on the basis of the network identifier of the second terminal obtained from the D2D server.