Abstract: A print system for transmitting print data from a host PC to a printer by radio communication and performing printing. It is determined on the host PC side whether or not two-way communication by radio communication is possible, and if two-way communication is possible, information indicating that two-way communication is possible is transmitted to the printer. On the printer side, identification information of the host PC which transmitted the information indicating that two-way communication is possible is registered.

Abstract: There are provided a printing apparatus which can maintain an optimal transfer rate with an external device by an optimal buffer management, and a reception buffer management method thereof. In the printing apparatus according to this invention, assume that data received in unit of packet using a wireless interface from the external device is stored in a plurality of reception buffers. A maximum receivable data amount which can be used for receiving the data from the external device is determined on the basis of the number of the confirmed empty reception buffer(s). The data transmittable amount notified of the external device is then compared with the maximum receivable data amount. When receiving a request from the external device, the printing apparatus replies to the external device to change the notified data transmittable amount, in accordance with the comparison result.