JPS5518129A - Data transmission device - Google Patents
Data transmission deviceInfo
- Publication number
- JPS5518129A JPS5518129A JP9067578A JP9067578A JPS5518129A JP S5518129 A JPS5518129 A JP S5518129A JP 9067578 A JP9067578 A JP 9067578A JP 9067578 A JP9067578 A JP 9067578A JP S5518129 A JPS5518129 A JP S5518129A
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- data
- time
- flag
- transmitted
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
PURPOSE: To avoid dropout of one block due to the error caused to FLAG by carrying out the communication previously between the transmission side and the reception side for measurement of the transmission time and then utilizing the measured value of the transmission time.
CONSTITUTION: The specified signal is transmitted to the reception side prior to the data transmission at the transmission side, and the similar specified signal is then transmitted to the transmission side in return. Thus the data is transmitted at the transmission side, and the time from transmission of the specified signal to arrival of the data is measured at the transmission side to calculate the transmission delay time. In case some error takes place to data No. 1, the retransmission request signal is sent to the transmission side from the reception side, and the time is measured after transmission of the request signal to know previously the time when FLAG of data No. 1 arrives at the reception side. Thus, the error, if any, caused to FLAG of data No. 1. according to the retransmission request is decided.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9067578A JPS5518129A (en) | 1978-07-24 | 1978-07-24 | Data transmission device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9067578A JPS5518129A (en) | 1978-07-24 | 1978-07-24 | Data transmission device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5518129A true JPS5518129A (en) | 1980-02-08 |
Family
ID=14005108
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9067578A Pending JPS5518129A (en) | 1978-07-24 | 1978-07-24 | Data transmission device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5518129A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02150021U (en) * | 1989-05-23 | 1990-12-25 |
-
1978
- 1978-07-24 JP JP9067578A patent/JPS5518129A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02150021U (en) * | 1989-05-23 | 1990-12-25 |
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