Delivery device, communication system, load balancing method, and load balancing program
US9521059B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2013 |
| Grant date | Dec 13, 2016 |
| Priority date | — |
| Expiry date | Nov 29, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L47/28
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Provided are a delivery device, a communication system, a load balancing method, and a load balancing program that enable processing loads for maintaining connections with terminals to be balanced over time, and enable the real time property of message delivery to be maintained for an event notification service. The delivery device is provided with: a communication unit (11) that transmits, to each terminal connected to the delivery device, a keepalive signal to maintain the connection between the delivery device and each terminal when there is no data to be delivered; and a transmission time determination unit (12) that divides a period in which the communication unit (11) transmits a keepalive signal into a plurality of time slots, calculates the expected number of transmissions of the keepalive signal for each time slot on the basis of keepalive signal interval information, which represents the interval of the keepalive signal for each terminal, and, if the expected number of transmissions exceeds a predefined threshold value, transmits, to the communication unit (11), the keepalive signal for the portion exceeding the threshold value in the time slot prior to the time slot.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.