JPS5689148A - Radio device of switching without instantaneous break - Google Patents
Radio device of switching without instantaneous breakInfo
- Publication number
- JPS5689148A JPS5689148A JP16564279A JP16564279A JPS5689148A JP S5689148 A JPS5689148 A JP S5689148A JP 16564279 A JP16564279 A JP 16564279A JP 16564279 A JP16564279 A JP 16564279A JP S5689148 A JPS5689148 A JP S5689148A
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- frame synchronizing
- frame
- pulses
- circuit
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
PURPOSE:To prevent frame step out of the receiving side due to transmission switching, by supplying frame synchronizing pulses of the current transmitter to the frame synchronizing pulse generating circuit of the stand-by transmitter as reset pulses. CONSTITUTION:Frame synchronizing pulses of prescribed periods obtained from frame pulse generating circuits 7 and 7' are inserted to prescribed empty parts of the base band pulse train after speed conversion to perform multiplex synchronization. The frame synchronizing pulse obtained in transmission system 1 is given to circuit 7' in stand-by system 2 through signal line 8 as a reset pulse. When receiving this pulse, circuit 7' generates a frame synchronizing pulse which coincides with the frame synchronizing pulse of the current system in respect to time. Consequently, since frame synchronizing pulses coincide always with each other in both systems, step out of the receiving side due to transmission switching does not occur.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16564279A JPS5689148A (en) | 1979-12-21 | 1979-12-21 | Radio device of switching without instantaneous break |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16564279A JPS5689148A (en) | 1979-12-21 | 1979-12-21 | Radio device of switching without instantaneous break |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5689148A true JPS5689148A (en) | 1981-07-20 |
JPS6228903B2 JPS6228903B2 (en) | 1987-06-23 |
Family
ID=15816233
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16564279A Granted JPS5689148A (en) | 1979-12-21 | 1979-12-21 | Radio device of switching without instantaneous break |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5689148A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4574377A (en) * | 1982-11-26 | 1986-03-04 | Fujitsu Limited | Synchronization method and apparatus in redundant time-division-multiple-access communication equipment |
US6256291B1 (en) | 1967-04-27 | 2001-07-03 | Fujitsu Limited | Method of switching between redundant routes in communication system devoid of redundant transmission |
-
1979
- 1979-12-21 JP JP16564279A patent/JPS5689148A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6256291B1 (en) | 1967-04-27 | 2001-07-03 | Fujitsu Limited | Method of switching between redundant routes in communication system devoid of redundant transmission |
US4574377A (en) * | 1982-11-26 | 1986-03-04 | Fujitsu Limited | Synchronization method and apparatus in redundant time-division-multiple-access communication equipment |
Also Published As
Publication number | Publication date |
---|---|
JPS6228903B2 (en) | 1987-06-23 |
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