Base Station Emergency Flag for Mobile Broadcast Reliability
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Solution Overview
Problem
Conventional mobile communications systems face challenges in efficiently broadcasting emergency information to a wide area without overloading the network and ensuring immediacy, as they are limited by communication line capacity and receive characteristics, especially in indoor or shaded areas, and may not deliver multimedia content effectively.
Innovation Solution
A mobile communications system that utilizes a broadcast type multimedia service by setting a flag indicating the presence of emergency information on the control channel, allowing mobile terminals to receive emergency information without additional load on the network and ensuring timely delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional mobile communications systems use traditional broadcast methods or speaker-based systems, then emergency information can be delivered to some areas, but those living distant from speakers or in poor reception areas cannot receive the information
Solution Approach 1:
The system uses mobile terminals that users already possess and carry everywhere, transforming them into universal receivers for emergency information. This eliminates the need for fixed speaker installations and ensures coverage in all areas where mobile phone signals reach, including distant and hard-to-reach locations.
Solution Approach 2:
The patent introduces a base station as an intermediary that receives emergency information from the public safety answering point and broadcasts it to multiple mobile terminals simultaneously. This mediator enables efficient one-to-many communication, solving the problem of delivering information to widespread areas without overloading individual communication channels.
2Reliability
If the system broadcasts emergency information to all mobile terminals using traditional methods, then information can reach registered users, but it overloads the communication line and cannot notify users immediately
Solution Approach 1:
The system uses periodic broadcasting through the base station to transmit emergency information to multiple mobile terminals simultaneously. This periodic broadcast mechanism delivers information immediately to all users in the coverage area without requiring individual sequential communications, thus avoiding communication line overload while ensuring immediate notification.
3Adaptability or versatility
If the system uses CBS (Cell Broadcast Service) to notify emergency information, then it can reach mobile terminals in idle state, but it cannot notify terminals in other states (CELL_DCH, CELL_FACH, CELL_PCH, URA_PCH)
Solution Approach 1:
The patent makes the emergency information notification system universal by enabling base stations to broadcast information to mobile terminals regardless of their operational state. The base station's broadcast capability reaches terminals in idle state, CELL_DCH, CELL_FACH, CELL_PCH, and URA_PCH states simultaneously, ensuring complete coverage of all user populations without requiring terminals to be in a specific state.
Data Source
AI summary
A mobile communications system including a mobile terminal 1 and a base station 2 which relays communications between a network and the mobile terminal 1, in which the base station 2 can deliver information to the mobile terminal 1 by using an MBMS, in which the base station 2 sets a flag indicating presence or absence of emergency information to a control channel used for the MBMS, and notifies the presence or absence of the emergency information to the mobile terminal 1 by using the description of the flag set to the control channel for the MBMS.