Patent ID: 9621629
Date: 2017-04-11
CPC Classifications: H04L,H04W

Claim:
1. A content distribution system, comprising: a distribution server that distributes content; a packet forwarding apparatus that forwards a packet to be sent and received between the distribution server and a user terminal; and a cache server connected to the packet forwarding apparatus, wherein the cache server comprises: the bit rate calculator measures a packet response time as difference between time at which a prescribed packet is transmitted from the transmission unit and time at which a TCP response signal to the prescribed packet is received from the user terminal, and calculates the bit rate based on the packet response time, the bit rate is B, the bit rate calculator calculates the bit rate B according to: the packet response time is T, a prescribed target response time is Ta, a prescribed convergence factor is α, a prescribed conversion factor by which time change is converted to bit rate is β, and a previous packet transmission bit rate is Bc.