Patent ID: 8923119

Claim:
A communication apparatus comprising: a determination means that determines whether or not a congestion degree of communication with a communication destination apparatus has exceeded a predetermined determination value based on a threshold for a comparison with the value of a congestion window obtained by communication using a stream control transmission protocol (SCTP) which is a protocol of a transport layer, and a reference value for a comparison with the value of a receiver window corresponding to the communication destination apparatus obtained by the communication using the SCTP; and a communication control means that transmits a plurality of streams which are established within an association which is formed between the communication apparatus and the communication destination apparatus in the communication using the SCTP to the communication destination apparatus in parallel under a situation in which the congestion degree does not exceed the determination value, and thereafter interrupts at least a transmission of a stream having priority lower than other streams among the plurality of streams transmitted in parallel if the congestion degree exceeds the determination value, the priority of each stream being indicated by priority information, wherein the communication control means transmits the streams by using the SCTP, and the predetermined determination value is smaller than a congestion degree with which the communication control means makes a determination in accordance with the SCTP as to whether or not a communication between the communication apparatus and the communication destination apparatus is being congested.