| 发明名称 |
COMMUNICATION APPARATUS, METHOD OF CONTROLLING THE SAME, AND STORAGE MEDIUM |
| 摘要 |
A communication apparatus receives a packet, to which a sequence number is attached, from an external apparatus using UDP, determines whether or not to make a request for retransmission of a packet to the external apparatus based on the received packet, and transmits a retransmission request using TCP to the external apparatus in a case where it determines to make the request for the retransmission of the packet to the external apparatus. In a case where the apparatus transmits the retransmission request, the apparatus receives, using UDP, a packet that the external apparatus retransmitted in accordance with the retransmission request, and in a case where it is determined not to make a request for a retransmission, the apparatus transmits to the external apparatus, using TCP, a notification indicating that the packet has been normally received. |
| 申请公布号 |
US2014297791(A1) |
申请公布日期 |
2014.10.02 |
| 申请号 |
US201414191569 |
申请日期 |
2014.02.27 |
| 申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
Tanji Masamichi |
| 分类号 |
H04L29/08 |
主分类号 |
H04L29/08 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A communication apparatus comprising:
a receiving unit configured to receive a packet, to which a sequence number is attached, from an external apparatus using UDP; a determination unit configured to determine whether or not to make a request for a retransmission of a packet to the external apparatus based on the packet received by the receiving unit; and a transmission unit configured to transmit a retransmission request using TCP to the external apparatus in a case where it is determined by the determination unit to make the request for the retransmission of the packet to the external apparatus, wherein in a case where the transmission unit transmits the retransmission request to the external apparatus, the receiving unit receives, using UDP, a packet that the external apparatus retransmitted in accordance with the retransmission request, and in a case where it is determined by the determination unit not to make a request for a retransmission of a packet to the external apparatus, the transmission unit transmits to the external apparatus, using TCP, a notification indicating that the packet has been normally received. |
| 地址 |
Tokyo JP |
