Elevator Service Request Continuity During Network Degradation
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Solution Overview
Problem
Existing elevator systems experience unwanted service delays due to network degradation during communication between a passenger's mobile device and the elevator system, leading to the need for repeated service requests and inefficient service delivery.
Innovation Solution
A mobile device and elevator system configuration that initiates a status update call after a service request call terminates due to network degradation, transmitting a reference number without additional requests, and receives periodic updates on the elevator's estimated arrival time, displaying user messages to avoid further calls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile device transmits a new service request after network link degradation, then a new link is established, but service delays occur for the passenger
Solution Approach 1:
The system performs preliminary actions by maintaining the service request state and elevator assignment information in memory during network degradation. When the network link is restored, the system automatically retransmits the existing service request with the reference number without requiring the passenger to manually initiate a new request, thus preventing service delays while ensuring reliable delivery.
2Reliability
If the passenger transmits repeated service requests due to network degradation, then service requests are resent, but unnecessary requests increase system complexity
Solution Approach 1:
The system implements feedback mechanisms where the controller acknowledges received service requests and assigns reference numbers. When network degradation occurs, the mobile device uses these reference numbers to identify and retransmit only the specific incomplete requests, rather than sending all service requests again. This feedback-based approach ensures reliable delivery while minimizing unnecessary communications and reducing system complexity.
3Adaptability or versatility
If the link over the network degrades, then communication is interrupted, but establishing a new link causes service delays
Solution Approach 1:
The system maintains continuity of useful action by preserving service request states and elevator assignments in memory during network interruptions. Instead of completely terminating and restarting the service request process when the network link degrades, the system keeps the request alive and automatically resumes transmission when connectivity is restored, ensuring continuous service delivery without time loss.
Data Source
AI summary
Disclosed is a mobile device configured to communicate over a network with a controller of an elevator system, wherein the mobile device is configured to: initiate a service request call over the network to the controller; transmit, to the controller during the service request call, a service request for an elevator service at a first level; receive, from the controller, a first data including a reference number that is indicative of an elevator assignment assigned to an elevator car in response to the service request, wherein the elevator assignment instructs the elevator car to travel to the first level; automatically initiate a status update call over the network to the controller when the service request call terminates before receiving the elevator service; and transmit, to the controller during the status update call, a second data including the reference number without transmitting an additional service request for the elevator service.