CN106788848B - A kind of Time Synchronization Network network-building method based on E1 - Google Patents
A kind of Time Synchronization Network network-building method based on E1 Download PDFInfo
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- CN106788848B CN106788848B CN201611248218.4A CN201611248218A CN106788848B CN 106788848 B CN106788848 B CN 106788848B CN 201611248218 A CN201611248218 A CN 201611248218A CN 106788848 B CN106788848 B CN 106788848B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/062—Synchronisation of signals having the same nominal but fluctuating bit rates, e.g. using buffers
- H04J3/0623—Synchronous multiplexing systems, e.g. synchronous digital hierarchy/synchronous optical network (SDH/SONET), synchronisation with a pointer process
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0685—Clock or time synchronisation in a node; Intranode synchronisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/08—Intermediate station arrangements, e.g. for branching, for tapping-off
- H04J3/085—Intermediate station arrangements, e.g. for branching, for tapping-off for ring networks, e.g. SDH/SONET rings, self-healing rings, meashed SDH/SONET networks
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Hardware Design (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Time-Division Multiplex Systems (AREA)
Abstract
The invention discloses a kind of Time Synchronization Network network-building method based on E1, this method makes several carry out cascade network by E1 from clock, by the way that E1 time slot is encoded and is respectively processed, temporal information is incorporated into the different time-gap of E1 by time service equipment, by time service equipment respectively from different time-gap acquisition time information, to realize precise synchronization network.Network-building method of the invention makes time service equipment and is direct-connected relationship in logic by time service equipment, it is possible to reduce synchronizing network cascades the number of plies, solves the problems, such as error accumulation when Time Synchronization Network multi-stage cascade, effectively increases synchronizing network precision.
Description
Technical field
The invention belongs to fields of communication technology, are related to time synchronization, especially a kind of Time Synchronization Network group based on E1
Network method.
Background technique
As shown in Figure 1, traditional Time Synchronization Network mostly uses greatly principal and subordinate's time synchronizing method, it is same from the 1st scalar time
It walks node device and carries out physical connection by grade to N grades of time synchronization node equipment.N scalar time synchronization node equipment is extremely
When N+1 scalar time synchronization node equipment carries out Time Transmission, certain error will cause, if concatenation level is too many, accidentally
Difference gradually linear can accumulate, and when having arrived least significant end time synchronization energy-saving device, the precision of time synchronization can be with the 1st scalar time
Synchronization node equipment differs greatly, to affect the precision of entire clock synchronization system.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, a kind of Time Synchronization Network group based on E1 is provided
Network method.
The purpose of the present invention is achieved through the following technical solutions:
This Time Synchronization Network network-building method based on E1 makes several carry out cascade network by E1 from clock, leads to
It crosses and E1 time slot is encoded and is respectively processed, temporal information is incorporated into the different time-gap of E1 by time service equipment, is set by time service
Back-up is not from different time-gap acquisition time information, to realize precise synchronization network.Specifically:
Including SDH network and the several from clock of SDH network are connected to, wherein carrying out group from clock by E1 cascade
Net includes each four E1 from clock, can make up two mutually incoherent looped networks, one of them is connected with clock from clock
Source.
Further, above-mentioned to work under Master or Slave mode from clock.
Further, when from clock work in Master mode, from clock obtain clock source send temporal information and when
Clock information, and temporal information and clock information are incorporated into 30 time slots of E1.
Further, when from clock work in Slave mode, from clock parsing E1 assigned timeslot temporal information and clock
Information, as the system time and system clock from clock, the specific time slot of parsing is configured by network management.
Further, above-mentioned clock source is given accurate time tranfer by the synchronised clock of DCLS and 2048KHz described
The slave clock of clock source connection, the slave clock connecting at this time with clock source serve as Master, which will
After 30 time slots all filling time and clock information of E1, E1 is transferred to the slave clock for serving as Slave, each serves as Slave
Slave clock according to network management configuration obtain assigned timeslot time and clock information, remaining time slot be then forwarded directly to next stage from
In clock.
Beneficial effects of the present invention:
Time Synchronization Network network-building method based on E1 of the invention is by E1 each from carrying out cascaded series between clock
Net is not desired to dry looped network all forming two from clock two-by-two, and the time is then passed through one from clock by precision clock source
Equipment is sent in network；Other obtain clock and time from clockwork from the E1 in this network；So physically N
It is direct-connected that the slave clock of grade, which is logically with the slave clock as Master, in this way, time service equipment is patrolled with by time service equipment
It is direct-connected relationship on volume, it is possible to reduce synchronizing network cascades the number of plies, solves error accumulation when Time Synchronization Network multi-stage cascade
Problem effectively increases synchronizing network precision.
Detailed description of the invention
Fig. 1 is time synchronization time service schematic network structure in the prior art；
Fig. 2 is networking mode figure of the present invention；
Fig. 3 is network diagram of the invention；
Fig. 4 is logical schematic of the invention.
Specific embodiment
The present invention is based on the Time Synchronization Network network-building methods of E1 are as follows: cascades several by E1 from clock TOE4
Networking, by the way that E1 time slot is encoded and is respectively processed, temporal information is incorporated into the different time-gap of E1, quilt by time service equipment
Time service equipment is respectively from different time-gap acquisition time information, to realize precise synchronization network.
The invention will be described in further detail with reference to the accompanying drawing:
Referring to fig. 2-4: the Time Synchronization Network network-building method of the invention based on E1 includes SDH network and is connected to
SDH network it is several from clock TOE4.Referring to Fig. 3, networking is carried out wherein cascading from clock TOE4 by E1, each from clock
TOE4 includes four E1, can make up two mutually incoherent looped networks, one of them is connected with clock source from clock TOE4.It is described
It can work under Master or Slave mode from clock TOE4.
When from clock TOE4 work in Master mode, from clock TOE4 obtain clock source send temporal information and when
Clock information, and temporal information and clock information are incorporated into 30 time slots of E1.
When from clock TOE4 work in Slave mode, from clock TOE4 parsing E1 assigned timeslot temporal information and when
Clock information, as the system time and system clock from clock TOE4, the specific time slot of parsing is configured by network management.
As shown in Figure 3: clock source of the invention is given accurate time tranfer by the synchronised clock of DCLS and 2048KHz
The slave clock TOE4 connecting with the clock source, the slave clock TOE4 connecting at this time with clock source serve as Master, this is served as
E1 is transferred to after 30 time slots filling time and clock information of E1 and serves as Slave's by the slave clock TOE4 of Master
From clock TOE4, the slave clock TOE4 for each serving as Slave obtains time and the clock information of assigned timeslot according to network management configuration,
Remaining time slot is then forwarded directly to next stage from clock TOE4, and physically N grades of slave clock TOE4 (is in this way
Slave operating mode), it is logically direct-connected with the slave clock TOE4 (in Master operating mode) that is connected with clock source
, it is possible to reduce synchronizing network cascades the number of plies, improves synchronizing network precision.
Claims (3)
1. a kind of Time Synchronization Network network-building method based on E1, which is characterized in that several is made to pass through E1 from clock (TOE4)
Cascade network is carried out, by the way that E1 time slot is encoded and is respectively processed, temporal information is incorporated into E1 not by time service equipment
Same time slot, by time service equipment respectively from different time-gap acquisition time information, to realize precise synchronization network；
The synchronizing network of this method is SDH network, and SDH network connection is several from clock (TOE4), wherein logical from clock (TOE4)
It crosses E1 cascade and carries out networking, include each four E1 from clock (TOE4), can make up two mutually incoherent looped networks, wherein one
It is a to be connected with clock source from clock (TOE4)；
It can wherein work under Master or Slave mode from clock (TOE4)；
Accurate time tranfer is given what the clock source connected with the synchronised clock of 2048KHz by DCLS by the clock source
From clock (TOE4), the slave clock (TOE4) connecting at this time with clock source serves as Master, this serves as the slave clock of Master
(TOE4) by after 30 time slots all filling time and clock information of E1, E1 is transferred to the slave clock (TOE4) for serving as Slave,
The slave clock (TOE4) for each serving as Slave obtains time and the clock information of assigned timeslot, remaining time slot according to network management configuration
Next stage is then forwarded directly to from clock (TOE4).
2. the Time Synchronization Network network-building method according to claim 1 based on E1, which is characterized in that when from clock
(TOE4) work obtains the temporal information and clock information that clock source is sent from clock (TOE4) in Master mode, and will
Temporal information and clock information are incorporated into 30 time slots of E1.
3. the Time Synchronization Network network-building method according to claim 1 based on E1, which is characterized in that when from clock
(TOE4) work in Slave mode, from clock (TOE4) parsing E1 assigned timeslot temporal information and clock information, as from
The specific time slot of the system time and system clock of clock (TOE4), parsing is configured by network management.
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| CN201611248218.4A CN106788848B (en) | 2016-12-29 | 2016-12-29 | A kind of Time Synchronization Network network-building method based on E1 |
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| CN201611248218.4A CN106788848B (en) | 2016-12-29 | 2016-12-29 | A kind of Time Synchronization Network network-building method based on E1 |
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| CN106788848A CN106788848A (en) | 2017-05-31 |
| CN106788848B true CN106788848B (en) | 2019-05-03 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101330374A (en) * | 2007-06-18 | 2008-12-24 | 大唐移动通信设备有限公司 | Method and system for synchronizing clock of transmission network as well as subordinate clock side entity |
| CN103442312A (en) * | 2013-09-06 | 2013-12-11 | 国家电网公司 | Intelligent power distribution network time synchronization system and method based on PTN+EPON communication system |
| CN103533633A (en) * | 2013-10-24 | 2014-01-22 | 北京市万格数码通讯科技有限公司 | Simulcasting method of simulcasting system constructed based on E1 link |
| CN104219014A (en) * | 2013-06-03 | 2014-12-17 | 浙江省电力公司 | PTP clock synchronization method based on SDH transmission network |
| CN105187150A (en) * | 2015-09-30 | 2015-12-23 | 南京务本信息科技有限责任公司 | SDH network-based clock synchronizing system |
-
2016
- 2016-12-29 CN CN201611248218.4A patent/CN106788848B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101330374A (en) * | 2007-06-18 | 2008-12-24 | 大唐移动通信设备有限公司 | Method and system for synchronizing clock of transmission network as well as subordinate clock side entity |
| CN104219014A (en) * | 2013-06-03 | 2014-12-17 | 浙江省电力公司 | PTP clock synchronization method based on SDH transmission network |
| CN103442312A (en) * | 2013-09-06 | 2013-12-11 | 国家电网公司 | Intelligent power distribution network time synchronization system and method based on PTN+EPON communication system |
| CN103533633A (en) * | 2013-10-24 | 2014-01-22 | 北京市万格数码通讯科技有限公司 | Simulcasting method of simulcasting system constructed based on E1 link |
| CN105187150A (en) * | 2015-09-30 | 2015-12-23 | 南京务本信息科技有限责任公司 | SDH network-based clock synchronizing system |
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