Bearer-Based D2D Communication for Distant Terminals
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Solution Overview
Problem
Existing device-to-device (D2D) communication technologies are limited by distance, preventing effective communication between terminals that are far apart, and existing solutions do not adequately address this issue without causing high delays.
Innovation Solution
A data communication method and apparatus that utilizes a direct discovery name management function (DDNMF) to facilitate D2D communication by allocating discovery parameters and establishing bearer paths through access and mobility management functions, session management functions, and user plane functions to enable communication between distant terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If direct D2D communication is used between terminals, then communication delay is reduced, but communication distance is limited
Solution Approach 1:
The patent introduces a base station as an intermediary to relay data between distant terminals. The base station receives data from a first terminal, forwards it to a second terminal, and handles response data in reverse. This mediator approach enables communication beyond direct terminal-to-terminal range while maintaining relatively low latency compared to traditional network routing.
2Length of moving object
If base station relaying is used to extend communication distance, then communication distance is improved, but system complexity increases
Solution Approach 1:
The base station performs multiple functions: it acts as a relay for D2D communication, manages local carrier allocation, coordinates terminal discovery, and handles data forwarding. By consolidating these diverse functions in a single multi-functional base station, the system avoids the complexity of adding separate dedicated relay devices while extending communication distance.
3Productivity
If local carrier is established for D2D communication, then communication efficiency is improved, but resource allocation complexity increases
Solution Approach 1:
The patent establishes a local carrier specifically dedicated to D2D communication between nearby terminals. This local carrier is allocated and managed by the base station for specific terminals engaged in D2D communication, allowing optimized resource usage for local traffic while maintaining separate resource pools for other communication types. The base station dynamically allocates and releases these local carriers based on actual D2D communication needs.
Data Source
Figure 1A~1B
Figure 2
Figure 3~4
AI summary
Embodiments of this application provide a data communication method and a communication apparatus. The data communication method includes: receiving a first message, where 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; and sending first information to an access network device based on the first message, where 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. In embodiments of this application, communication between two terminals that are far away from each other can be implemented, and a delay is not high.