Calling Device Area Code Group Communication
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Solution Overview
Problem
Existing communication systems require time and effort to identify and call specific terminal devices in a designated area for group communication, especially in emergency situations, as they rely on GPS positional information and area matching, which can be cumbersome and inefficient.
Innovation Solution
A communication system and method that uses a calling device with a receiving unit, storage unit, adjusting unit, selection units, and transmission units to simplify group communication by using area identifiers (area Nos.) based on positional information, allowing for dynamic adjustment of area sizes and lists according to time, event type, or device density, enabling efficient and targeted calls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS positional information and area matching are used for group communication, then communication accuracy is improved, but system complexity and operation time increase
Solution Approach 1:
The patent extracts the area identification function from complex GPS coordinate matching and implements it through simplified area codes. The calling device determines terminal devices within a designated area by using area codes rather than processing full GPS coordinates, thereby reducing system complexity while maintaining communication accuracy.
Solution Approach 2:
The patent changes the parameter representation from detailed GPS coordinates to simplified area codes. The storage unit stores correspondence relationships between area codes and terminal devices, allowing the calling device to quickly identify targets using area codes instead of complex coordinate matching algorithms.
2Measurement precision
If terminal devices hold positional data lists for area matching, then communication precision is improved, but device memory requirements and operation time increase
Solution Approach 1:
The patent removes the requirement for terminal devices to store and process positional data lists. Instead, the calling device holds the area code to terminal device correspondence relationships in its storage unit, eliminating the time-consuming list holding and processing operations at the terminal device level.
Solution Approach 2:
The patent introduces area codes as an intermediary between GPS positional information and terminal device identification. The calling device uses area codes as a simplified intermediary representation to quickly identify terminal devices within a designated area without requiring terminals to maintain complex positional data lists.
3Ease of operation
If area information is added to call signals for group communication, then communication targeting is improved, but signal processing complexity increases
Solution Approach 1:
The patent extracts the area identification function from complex signal processing and implements it through simple area code transmission. The calling device transmits area codes in call signals, and terminal devices simply compare the received area code with their assigned area code, significantly reducing signal processing complexity while maintaining effective targeting.
Data Source
AI summary
A receiving unit receives positional information of a terminal device. A storage unit stores a list in which a plurality of correspondence relationships between an area and an identifier are included. An adjusting unit adjusts the correspondence relationship included in the list. A first selection unit selects, from the adjusted list, an identifier corresponding to the received positional information. A first transmission unit transmits the selected identifier to the terminal device. An input unit inputs information on an area to be called. A second selection unit selects, from the adjusted list, an identifier corresponding to the input information. A second transmission unit transmits a call signal including the selected identifier.