Mobile Terminal Selective Network Restriction for Interference Control
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Solution Overview
Problem
Existing mobile communication systems lack the ability to selectively disable specific functions of a mobile communication terminal within a specific area, such as hospitals or vehicles, leading to potential interference with medical equipment or other devices.
Innovation Solution
A mobile communication terminal and system that determine the availability of a secondary communication network upon moving from one base station area to another, enabling communication over the secondary network and restricting communication over the primary network, thereby selectively disabling specific functions within designated areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If all functions of the mobile communication terminal are disabled in a specific area, then interference with medical equipment is prevented, but unnecessary functions that do not need disabling are also disabled
Solution Approach 1:
The patent segments the communication functions by creating separate communication units for different networks (first communication unit for public network, second communication unit for private network). This allows selective disabling of specific communication functions rather than disabling all functions, resolving the contradiction between preventing interference and maintaining adaptability.
Solution Approach 2:
The patent applies local quality by making different communication units operable in different areas. The first communication unit is restricted in the first area (hospital zone) while the second communication unit remains operable. This allows specific functions to be disabled locally without affecting other functions, resolving the contradiction between preventing harmful interference and maintaining versatility.
2Reliability
If the mobile communication terminal switches to a second communication network in a specific area, then communication continuity is maintained, but system complexity increases
Solution Approach 1:
The patent implements dynamic network switching where the terminal automatically selects which communication unit to use based on the current area. The control unit dynamically changes the operable state of communication units based on location information, maintaining communication reliability while managing complexity through automated control.
Solution Approach 2:
The control unit acts as an intermediary that manages the switching between different communication networks. It receives area information, determines the appropriate network to use, and controls the operable state of communication units accordingly, simplifying the overall system architecture while maintaining communication continuity.
Data Source
AI summary
When moving from a public wireless area to a local wireless area, a mobile communication terminal transmits its telephone number to a local wireless service authentication server to inquire whether the mobile communication terminal can receive a local wireless service. The local wireless service authentication server, in response to the inquiry, determines whether the telephone number of the mobile communication terminal itself is registered in a local telephone number storage unit. When the number is registered therein, a transmission power level reduction instruction signal is transmitted to the mobile communication terminal. The mobile communication terminal, in response to the reception of the signal, controls the wireless unit to reduce output level of the transmission power in a wireless unit to a level that it can be received by a local base station while it cannot be received by a public base station. This enables restricting communication that uses public wireless network.