Phonebook Server for D2D Communication Initiation
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Solution Overview
Problem
Existing D2D communication methods using radio access networks face challenges in determining whether direct communication is possible between terminals, leading to ineffective initiation of D2D communication.
Innovation Solution
A communication system and method that includes a phonebook server managing phonebook data to identify candidate terminals capable of direct communication based on location, allowing terminals to execute direct communication without involving a radio access network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If D2D communication is performed using a radio access network, then long-distance and large-capacity communication is enabled, but the communication application cannot determine whether D2D communication is executable with a counterpart terminal
Solution Approach 1:
The system performs preliminary actions by having the radio access network pre-determine and store D2D communication executability information in the phonebook server before the communication application needs to initiate D2D communication. This allows the terminal to quickly check whether D2D communication is executable without performing complex real-time determinations.
Solution Approach 2:
The patent introduces a phonebook server as an intermediary between the terminal and the D2D communication process. The server stores and provides D2D communication executability information, acting as a mediator that resolves the complexity of determining whether D2D communication can be executed between specific terminals.
2Measurement precision
If the terminal checks D2D communication executability in real-time, then communication initiation accuracy is improved, but processing time and system complexity increase
Solution Approach 1:
The radio access network performs the determinative action in advance by pre-evaluating and storing D2D communication executability information in the phonebook server. When the communication application needs to initiate D2D communication, it can directly retrieve this pre-determined information without performing time-consuming real-time checks.
Solution Approach 2:
The system enables self-service by having the terminal autonomously check the D2D communication executability information stored in the phonebook server without requiring complex real-time interactions with the radio access network or other terminals, thus reducing processing time while maintaining accuracy.
3Productivity
If D2D communication executability information is stored in the phonebook server, then communication initiation speed is improved, but network infrastructure requirements increase
Solution Approach 1:
The patent applies universality by having the phonebook server perform multiple functions: it not only stores D2D communication executability information but also provides phonebook services and other communication-related functions. This multi-functionality approach allows the system to improve D2D communication initiation speed without requiring completely new infrastructure, as the existing phonebook server is extended to handle additional responsibilities.
Data Source
AI summary
Provided are a communication system capable of causing a communication application to speedily find out whether D2D communication is possible or not. The phonebook server 300 includes a phonebook data acquisition unit 310 configured to acquire first phonebook data containing an identifier of a terminal 400B, a terminal location acquisition unit 320 configured to acquire a location of the terminal 400B contained in the first phonebook data acquired by the phonebook data acquisition unit 310, a phonebook data generation unit 330 configured to generate second phonebook data containing an identifier of a candidate terminal capable of direct communication, based on the location of the terminal 400B acquired by the terminal location acquisition unit 320, and a transmission unit 340 configured to send a terminal 400A the second phonebook data generated by the phonebook data generation unit 330.