Communication system, transmission apparatus, reception apparatus, communication apparatus, communication method, and program

• US 10,178,440 B2
• Filed: 04/03/2015
• Issued: 01/08/2019
• Est. Priority Date: 04/04/2014
• Status: Active Grant

• Current Assignee: NTT Communications Corporation (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Communications Corporation (Nippon Telegraph and Telephone Corporation)
• Inventors: Ogihara, Toshihiko
• Primary Examiner(s): Abraham, Esaw T
• Application Number:
  US15/301,660
• Publication Number:
  US 20170180816A1
• Time in Patent Office: 1,376 Days
• CPC Class Codes: H04L 1/14 in which the signals are sent back to the transmitter to be checked ; echo systems
• CPC Class Codes: H04L 1/1809 Selective-repeat protocols
• CPC Class Codes: H04L 12/6418 Hybrid transport
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04L 69/40 for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection management of faults, events, alarms or notifications in data switching networks H04L41/06
• CPC Class Codes: H04N 19/15 by monitoring actual compressed data size at the memory before deciding storage at the transmission buffer
• CPC Class Codes: H04N 21/23406 involving management of server-side video buffer
• CPC Class Codes: H04N 21/44004 involving video buffer management, e.g. video decoder buffer or video display buffer
• CPC Class Codes: H04N 21/6375 for requesting retransmission , e.g. of data packets lost or corrupted during transmission from serverARQ protocols H04L1/18; implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP] H04L69/16

Abstract

A communication system including a transmission apparatus and a reception apparatus, the transmission apparatus including: a buffer configured to hold first data to transmit; transmission means configured to transmit the first data to the reception apparatus; reception means configured to receive second data that the reception apparatus returns; comparison means configured to compare the second data with the first data held by the buffer; and control means configured, when a result of the comparison by the comparison means is unmatch, to instruct the transmission means to retransmit the first data.

Claims

1. A communication system including a transmission apparatus and a reception apparatus,

the transmission apparatus comprising:

a buffer configured to hold first data to transmit;

a transmitter configured to transmit the first data to the reception apparatus;

a receiver configured to receive second data that the reception apparatus returns; and

processing circuitry configured to

perform a comparison to compare the second data with the first data held by the buffer; and

when a result of the comparison is unmatch, instruct the transmitter to retransmit the first data,

wherein the processing circuitry instructs the transmitter to retransmit the first data when time-out occurs without receiving the second data within a predetermined period.

2. The communication system as claimed in claim 1, wherein the transmission apparatus transmits next first data without waiting return of the second data.

3. The communication system as claimed in claim 2, wherein the number of pieces of the first data to transmit without waiting the return of the second data is determined by a predetermined setting.

4. The communication system as claimed in claim 1, wherein the processing circuitry deletes the first data from the buffer when a result of the comparison is match.

5. The communication system as claimed in claim 1, wherein, after retransmitting first data due to time-out, the communication system waits by performing backoff when time-out also occurs for the first data, and when further time-out occurs, the communication system checks a state of the reception apparatus by another communication method.

6. The communication system as claimed in claim 1, wherein the first data and the second data are transferred by using datagram communication.

7. A transmission apparatus comprising:

a buffer configured to hold first data to transmit;

a transmitter configured to transmit the first data to a reception apparatus;

a receiver configured to receive second data that the reception apparatus returns; and

processing circuitry configured to

perform a comparison to compare the second data with the first data held by the buffer; and

when a result of the comparison is unmatch, instruct the transmitter to retransmit the first data,

wherein the processing circuitry instructs the transmitter to retransmit the first data when time-out occurs without receiving the second data within a predetermined period.

8. A computer-readable recording medium storing a program for causing a computer to function as the transmission apparatus as claimed in claim 7.

9. A communication method performed by a transmission apparatus, comprising:

a step of transmitting, via a transmitter, first data to a reception apparatus;

a step of receiving, via a receiver, second data that the reception apparatus returns;

a step of comparing, by processing circuitry, the second data with the first data; and

a step of, when a result of the step of comparing, by the processing circuitry, is unmatch, retransmitting the first data,

wherein the method further includes instructing, by the processing circuitry, the transmitter to retransmit the first data when time-out occurs without receiving the second data within a predetermined period.