Transmission device, reception device, control method, program, and transmission and reception system

A control method comprising:

• distributing packet data configuring a packet that stores data to be transmitted into a plurality of lanes;
• transmitting data streams having same data structures including the distributed packet data to a reception device by using the plurality of lanes in parallel;
• and
• in a case where the data stream is transmitted in a mode, when a parameter that defines content of the mode is changed, switching transmission of the data stream in the mode defined by the changed parameter, the switching transmission being started after training processing for performing data synchronization and correction of a difference between data timings of the lanes by the reception device is executed or being started without executing the training processing, according to a type of the changed parameter, wherein
• when the type of the changed parameter indicates that a type of a transmission rate of each lane is changed, the transmission of the data stream in the mode defined by the changed parameter is started after the training processing.

A non-transitory computer readable medium storing a program, the program being executable by a computer to perform operations comprising:

• distributing packet data configuring a packet that stores data to be transmitted into a plurality of lanes;
• transmitting data streams having the same data structure including the distributed packet data to a reception device by using the plurality of lanes in parallel;
• and
• in a case where the data stream is transmitted in a mode, when a parameter that defines content of the mode is changed, switching transmission of the data stream in the mode defined by the changed parameter, the switching transmission being started after training processing for performing data synchronization and correction of a difference between data timings of the lanes by the reception device is executed or being started without executing the training processing, according to a type of the changed parameter, wherein
• when the type of the changed parameter indicates that a type of a transmission rate of each lane is changed, the transmission of the data stream in the mode defined by the changed parameter is started after the training processing.

A reception device comprising:

• a plurality of signal processors configured to distribute packet data configuring a packet that stores data to be transmitted into a plurality of lanes and receive data streams transmitted from a transmission device that transmits the data streams having same data structures including the distributed packet data by using the plurality of lanes in parallel;
• and
• a controller configured to, in a case where the data stream is transmitted in a mode, when a parameter that defines content of the mode is changed, switch the reception of the data stream transmitted in the mode defined by the changed parameter the switch being started after training processing for performing data synchronization and correction of a difference between data timings of the lanes is executed or being started without executing the training processing according to a type of the changed parameter, wherein
• when the type of the changed parameter indicates that a type of a transmission rate of each lane is changed, the transmission of the data stream in the mode defined by the changed parameter is started after the training processing.

A control method comprising:

• distributing packet data configuring a packet that stores data to be transmitted into a plurality of lanes and receiving data streams transmitted from a transmission device that transmits the data streams having same data structures including the distributed packet data by using the plurality of lanes in parallel;
• and
• in a case where the data stream is transmitted in a mode, when a parameter that defines content of the mode is changed, switching the reception of the data stream transmitted in the mode defined by the changed parameter is started after training processing for performing data synchronization and correction of a difference between data timings of the lanes is executed or is started without executing the training processing according to a type of the changed parameter, wherein
• when the type of the changed parameter indicates that a type of a transmission rate of each lane is changed, the transmission of the data stream in the mode defined by the changed parameter is started after the training processing.

A non-transitory computer readable medium storing a program, the program being executable by a computer to perform operations comprising:

• distributing packet data configuring a packet that stores data to be transmitted into a plurality of lanes and receiving data streams transmitted from a transmission device that transmits the data streams having same data structures including the distributed packet data by using the plurality of lanes in parallel;
• and
• in a case where the data stream is transmitted in a mode, when a parameter that defines content of the mode is changed, switching the reception of the data stream transmitted in the mode defined by the changed parameter is started after training processing for performing data synchronization and correction of a difference between data timings of the lanes is executed or is started without executing the training processing according to a type of the changed parameter, wherein
• when the type of the changed parameter indicates that a type of a transmission rate of each lane is changed, the transmission of the data stream in the mode defined by the changed parameter is started after the training processing.

A transmission and reception system comprising:

• a transmission device including:
• distribution circuitry that distributes packet data configuring a packet that stores data to be transmitted into a plurality of lanes;
• a plurality of signal processors that transmits data streams having same data structures including the distributed packet data to a reception device by using the plurality of lanes in parallel;
• and
• a controller that, in a case where the data stream is transmitted in a mode, when a parameter that defines content of the mode is changed, switches transmission of the data stream in the mode defined by the changed parameter is started after training processing for performing data synchronization and correction of a difference between data timings of the lanes by the reception device is executed or is started without executing the training processing, according to a type of the changed parameter, wherein
• when the type of the changed parameter indicates that a type of a transmission rate of each lane is changed, the transmission of the data stream in the mode defined by the changed parameter is started after the training processing;
• and
• a reception device including:
• a plurality of signal processors that receives the data streams transmitted from the transmission device;
• and
• a controller that, in a case where the data stream is transmitted in a mode, when the parameter is changed, switches reception of the data stream in the mode defined by the changed parameter is started after the training processing is executed or without executing the training processing according to the type of the changed parameter.