Patent ID: 8743216

Claim:
A communication system including a plurality of image supply apparatuses and an image output apparatus, each of the plurality of image supply apparatuses and the image output apparatus comprising: a first communication control unit configured to control communication using a first protocol; a second communication control unit configured to control communication relating to an image using a second protocol; and a link control unit configured to perform control associated with a connection of communication by said first communication control unit and said second communication control unit, wherein if communication with a first image supply apparatus using the first protocol is disconnected before completion of output processing of an image supplied from the first image supply apparatus under communication control by said second communication control unit, and a second image supply apparatus requests a connection, said link control unit of the image output apparatus establishes a connection of communication with the second image supply apparatus using the first protocol and holds a connection to the second image supply apparatus using the second protocol until the completion of the output processing of the image.