Distribution server or distribution route design device, distribution server or distribution route design method and program

摘要

In a CDN, the frequency of rejecting a delivery request from a user is suppressed to improve the CDN service. In a CDN, a distribution server or a distribution route design device for designing a probability of selecting a distribution server or a distribution route used for content distribution in response to a distribution request from a user includes a network parameter, a distribution request The cache server is selected as the distribution server so as to suppress the excessive distribution request that rejects the distribution request from the user based on the received input parameter value and the parameter input unit that receives the demand estimation amount as the input parameter value A selection probability design unit that designs a selection probability or a selection probability of a distribution route that is a set of a distribution route and a distribution server through which the distribution server distributes content using model predictive control, and the selection probability of the designed cache server Or a selection probability output unit that outputs a selection probability of the distribution route. [Selection] Figure 1