Public Transportation Information Encoding for Terminal Compatibility
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Solution Overview
Problem
Current public transportation information systems lack standardization and efficiency in providing real-time data to users, leading to inconvenience and inefficiency in using public transportation, particularly in areas with frequent traffic congestion.
Innovation Solution
A method and apparatus for encoding and decoding public transportation information using a structured format that includes an information system identifier, bus route details, current bus locations, travel times, and status information, transmitted via TPEG messages, allowing for real-time updates and standardization across different terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If public transportation information is provided in a standardized format, then compatibility across different terminals is improved, but data transmission complexity increases
Solution Approach 1:
The information is segmented into distinct components: a header containing message management information (message type, length, creation time) and a body containing the actual public transportation status data. This segmentation allows terminals to efficiently parse and process only the relevant portions while maintaining standardized interoperability.
Solution Approach 2:
The standardized message format serves multiple functions simultaneously: it provides message identification through type fields, ensures data integrity through length specifications, enables chronological processing through creation time stamps, and maintains compatibility across different terminal manufacturers. This universal structure resolves the contradiction by making the format adaptable to various terminals while managing complexity through consistent rules.
2Ease of operation
If detailed status information on each bus is provided, then user convenience is improved, but data transmission volume increases
Solution Approach 1:
The patent extracts and transmits only the essential status information needed for user convenience: current location of each bus, travel time to next stops, and operational status. Non-essential detailed information is omitted from real-time transmission, reducing data volume while maintaining sufficient user convenience for making transportation decisions.
Solution Approach 2:
The system provides partial information about each bus - specifically focusing on location, travel time, and operational status - rather than transmitting complete detailed records. This partial action approach delivers sufficient user convenience for real-time decision-making while keeping data transmission volume manageable for broadcast systems.
3Reliability
If real-time bus location and travel time information is updated frequently, then information accuracy is improved, but energy consumption increases
Solution Approach 1:
The system implements periodic updates of bus status information through broadcast messages at regular intervals rather than continuous real-time transmission. The message creation time field enables terminals to track and update information periodically, maintaining sufficient accuracy for user needs while significantly reducing energy consumption compared to continuous transmission.
Data Source
AI summary
Disclosed herein is a method and apparatus for providing traffic information of public transportation means, such as a bus, and utilizing the provided information. A method of encoding public traffic information according to the present invention creates an identifier of bus information system, an ID of bus route, and location information of each in-service bus pertaining to the bus route. The location information is expressed in a stop ID that is uniquely allocated to all of bus stops within coverage of BSI (Bus Service Information) service. The created information is organized to status information that is in turn incorporated into a transfer message. A sequence of transfer messages, each being constructed as described above, is wirelessly transmitted.