Printing method using communication channel and management method for communication channel

A management method for a duplex asynchronous communication channel performed by a printing apparatus, the management method comprising:

• establishing a duplex asynchronous communication channel for communicating with an external apparatus;
• requesting print data for performing a printing operation to the external apparatus through the duplex asynchronous communication channel;
• determining whether a predetermined condition associated with an acquisition of the print data is satisfied in response to the requesting the print data;
• and
• controlling a channel duration time of the duplex asynchronous communication channel when the predetermined condition is satisfied.

A management method for a duplex asynchronous communication channel performed by a printing apparatus, the management method comprising:

• establishing a duplex asynchronous communication channel for communicating with an external apparatus;
• and
• requesting print data for performing a printing operation to the external apparatus through the duplex asynchronous communication channel, wherein:
• a channel duration time of the duplex asynchronous communication channel is controlled by the external apparatus;
• and
• the external apparatus determines whether a predetermined condition associated with an acquisition of the print data is satisfied in response to the request for the print data and controls the channel duration time depending on whether the predetermined condition is satisfied.

A management method for a duplex asynchronous communication channel, which is performed by a printing apparatus, the management method comprising:

• establishing a first duplex asynchronous communication channel and a second duplex asynchronous communication channel for communicating with an external apparatus;
• acquiring print data for controlling a printing operation of the printing apparatus from the external apparatus through the first duplex asynchronous communication channel;
• acquiring control data for controlling a state of the printing apparatus from the external apparatus through the second duplex asynchronous communication channel;
• and
• restricting a channel duration time of the first duplex asynchronous communication channel.

A printing apparatus comprising:

• a communication unit configured to establish a communication channel for communicating with an external apparatus and perform data communication with the external apparatus;
• a printing unit configured to perform a printing operation;
• and
• a control unit configured to control the communication unit to establish a first duplex asynchronous communication channel with the external apparatus,
• request print data for performing the printing operation to the external apparatus through the first duplex asynchronous communication channel by means of the communication unit,
• acquire the print data from the external apparatus through the first duplex asynchronous communication channel in response to the request the print data by means of the communication unit, and
• perform the printing operation on the basis of the acquired print data by means of the printing unit, wherein the print data is generated by the external apparatus and written in a format processible by the printing apparatus without a format conversion procedure.