Communication apparatus, control method for communication apparatus, and a non-transitory computer-readable storage medium

A control method for a communication apparatus that operates in accordance with an IEEE 802.11 series standard, comprising:

• transmitting data frames each including a data unit to an other communication apparatus a plurality of times continuously;
• generating a Block Ack Request (BAR) frame;
• transmitting the BAR frame to the other communication apparatus after transmission of the data frames the plurality of times continuously;
• and
• receiving a Block Ack (BA) frame as a response to the BAR frame from the other communication apparatus, wherein
• in the generating, a sequence number for a data unit in an initial data frame, from among the data frames transmitted the plurality of times continuously, is indicated using a predetermined field in the BAR frame, and
• the predetermined field includes a Fragment Number field and a Starting Sequence Number field in the BAR frame,
• wherein a number of digits of the Starting Sequence Number field changes depending on a value indicated by the Fragment Number field, and
• in a case where the 1st to 4th bits of the Fragment Number field are other than 1, 0, 0, 0, the Fragment Number field indicates that the number of digits of the Starting Sequence Number field is set to 12 digits, and
• wherein in a case where a 1st bit of the Fragment Number field is 1 and a 2nd to 4th bits are 0, the Fragment Number field indicates that the number of digits of the Starting Sequence Number field is set to 16 digits, wherein the 16 digits of the Starting Sequence Number field includes the 12 digits of the Starting Sequence Number field before extended and 4 digits of additional field which is different from the Fragment Number field, and the 16 digits of the Starting Sequence Number field follows the 4 digits of Fragment Number field in the first BAR frame.

A non-transitory computer-readable storage medium storing a program for causing a computer to execute a control method for a communication apparatus that operates in accordance with an IEEE 802.11 series standard characterized by comprising:

• transmitting data frames each including a data unit to an other communication apparatus a plurality of times continuously;
• generating a Block Ack Request (BAR) frame;
• transmitting the BAR frame to the other communication apparatus after transmission of the data frames the plurality of times continuously;
• and
• receiving a Block Ack (BA) frame as a response to the BAR frame from the other communication apparatus, wherein
• in the generating, a sequence number for a data unit in an initial data frame, from among the data frames transmitted the plurality of times continuously, is indicated using a predetermined field in the BAR frame, and
• the predetermined field includes a Fragment Number field and a Starting Sequence Number field in the BAR frame,
• wherein a number of digits of the Starting Sequence Number field changes depending on a value indicated by the Fragment Number field, and
• in a case where the 1st to 4th bits of the Fragment Number field are other than 1, 0, 0, 0, the Fragment Number field indicates that the number of digits of the Starting Sequence Number field is set to 12 digits, and
• wherein in a case where a 1st bit of the Fragment Number field is 1 and a 2nd to 4th bits are 0, the Fragment Number field indicates that the number of digits of the Starting Sequence Number field is set to 16 digits, wherein the 16 digits of the Starting Sequence Number field includes the 12 digits of the Starting Sequence Number field before extended and 4 digits of additional field which is different from the Fragment Number field, and the 16 digits of the Starting Sequence Number field follows the 4 digits of Fragment Number field in the first BAR frame.