Communication system, communication method and data receiving terminal

Patent metadata

Field	Value
Publication number	US-9444604-B2
Application number	US-201314377148-A
Country	US
Kind code	B2
Filing date	Feb 13, 2013
Priority date	Feb 21, 2012
Publication date	Sep 13, 2016
Grant date	Sep 13, 2016

Abstract

A communication system includes a data sending terminal which sends data and a data receiving terminal which sends an acknowledgement, which indicates that the data is received, to the data sending terminal in reply to receiving the data, and the data receiving terminal includes a unit which judges whether it is necessary to resend the acknowledgement on the basis of judgment whether the data receiving terminal receives new data from the data sending terminal within a predetermined time since sending the acknowledgement.

First claim

The invention claimed is:

1. A communication system, comprising:
a data sending unit that sends data; and
a data receiving unit for sending an acknowledgement which indicates receiving the data to the data sending unit in reply to receiving the data, wherein
the data receiving unit includes a part that judges whether it is necessary to resend the acknowledgement on the basis of judgment whether the data receiving unit receives new data from the data sending unit within a predetermined time since the data receiving terminal sent the acknowledgement, wherein
the data receiving unit includes a part that sets the predetermined time shorter than a time interval at which the data sending unit resends the data.

2. The communication system according to claim 1 , wherein
the data receiving unit further includes a part that stores predetermined data, which indicates resending, in the acknowledgement to be resent.

3. The communication system according to claim 2 , wherein
the data sending unit includes a part that distinguishes the acknowledgement, and the acknowledgement which stores the predetermined data.

4. The communication system according to claim 1 , wherein
the data sending unit includes:
a part that sends an acknowledgement receiving notice, which indicates that the acknowledgement is received, in reply to receiving the acknowledgement; and
a part that judges whether it is necessary to resend the acknowledgement on the basis of judgment whether the acknowledgement receiving notice is received from the data sending unit within a predetermined time since sending the acknowledgement.

5. A communication system, comprising:
a data sending unit that sends data; and
a data receiving unit for sending an acknowledgement which indicates receiving the data to the data sending unit in reply to receiving the data, wherein
the data receiving unit includes a part that judges whether it is necessary to resend the acknowledgement on the basis of judgment whether the data receiving unit receives new data from the data sending unit within a predetermined time since the data receiving terminal sent the acknowledgement, wherein
the data receiving unit includes:
a part that measures an elapse time since sending the acknowledgement;
a part that resends the acknowledgement in reply to the elapse time's reaching the predetermined time; and
a part that stops measuring the elapse time in reply to receiving the new data.

6. A communication
a data sending unit that sends data; and
a data receiving unit for sending an acknowledgement which indicates receiving the data to the data sending unit in reply to receiving the data, wherein
the data receiving unit includes a part that judges whether it is necessary to resend the acknowledgement on the basis of judgment whether the data receiving unit receives new data from the data sending unit within a predetermined time since the data receiving terminal sent the acknowledgement, wherein
the data receiving unit includes:
a part that calculates a time interval at which the data is received; and
a part that sets the predetermined time on the basis of the calculated time interval.

7. A data receiving terminal which receives data sent by a data sending terminal, comprising:
a first processing unit that sends an acknowledgement which indicates that the data is received to the data sending terminal in reply to receiving the data; and
a second processing unit that judges whether it is necessary to resend the acknowledgement on the basis of judgment whether new data is received from the data sending terminal within a predetermined time since sending the acknowledgement, wherein
the second processing unit further includes:
a part that measures an elapse time since sending the acknowledgement;
a part that resends the acknowledgement in reply to the elapse time's reaching the predetermined time; and
a part that stops measuring the elapse time in reply to receiving the new data.

8. A communication method, comprising:
sending an acknowledgement which indicates that data sent by a data sending terminal is received to the data sending terminal in reply to receiving the data; and
judging whether it is necessary to resend the acknowledgement on the basis of judgment whether new data is received from the data sending terminal within a predetermined time since sending the acknowledgement; and
setting the predetermined time shorter than a time interval at which the data sending terminal resends the data.

Assignees

• Nec Corp

Inventors

• Hasegawa Yohei
• Jibiki Masahiro

Classifications

• H04L1/1829 Primary

  Arrangements specially adapted for the receiver end · CPC title

• H04L69/168

  specially adapted for link layer protocols, e.g. asynchronous transfer mode [ATM], synchronous optical network [SONET] or point-to-point protocol [PPP] · CPC title

• H04L69/28

  Timers or timing mechanisms used in protocols · CPC title

• H04L5/0055 Primary

  Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861) · CPC title

• H04W24/08

  Testing, {supervising or monitoring} using real traffic · CPC title