Bearer-Based Data Forwarding for Distant-Terminal Communication
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Solution Overview
Problem
Existing device-to-device (D2D) communication is limited by distance, preventing direct communication between terminals that are far apart and resulting in high data transmission delays.
Innovation Solution
A data communication method involving a session management network element and access network device that directly forwards data between terminals using bearer identifiers, bypassing the core network to establish and utilize QoS flows for efficient communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If data is transmitted through the core network between distant terminals, then communication coverage is extended, but data transmission delay increases
Solution Approach 1:
The access network device serves as an intermediary that enables direct data forwarding between terminals without routing through the core network. The session management network element configures the access network device with bearer identifiers, allowing it to act as a local mediator that reduces transmission path length while maintaining communication coverage for distant terminals
Solution Approach 2:
The communication path is segmented into two parts: control plane functions remain in the core network for coverage extension, while user plane data transmission is localized at the access network level. This segmentation allows distant terminals to communicate with reduced delay by bypassing the core network for data forwarding
2Loss of time
If direct device-to-device communication is used between nearby terminals, then data transmission delay is reduced, but communication distance is limited
Solution Approach 1:
The access network device acts as an intermediary that extends the reach of direct terminal-to-terminal communication. It receives data from one terminal and forwards it to another terminal without requiring the terminals to be in direct proximity, thus maintaining low delay while extending communication distance beyond line-of-sight limitations
3Area of stationary object
If core network forwarding is used for distant terminal communication, then communication coverage is ensured, but communication efficiency decreases
Solution Approach 1:
The communication system is segmented into control plane (core network) and user plane (access network). The control plane ensures coverage by maintaining session management, while the user plane achieves high efficiency through localized data forwarding at the access network device, eliminating the need for distant data routing through the core network
Data Source
AI summary
A data communication method includes receiving a first message. The first message includes an identifier of a second terminal, and the first message requests to perform communication of a first application between a first terminal and the second terminal. The data communication method also includes sending first information to an access network device based on the first message. The first information includes an identifier of a first bearer and an identifier of a second bearer, the first bearer is for transmitting data of the first application for the first terminal, the second bearer is for transmitting the data of the first application for the second terminal, and the first information is used by the access network device to directly forward the data of the first application between the first terminal and the second terminal.