CN102404104B - Adaptive synchronicity method and system based on different delayed time mechanism - Google Patents
Adaptive synchronicity method and system based on different delayed time mechanism Download PDFInfo
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- CN102404104B CN102404104B CN201110378746.2A CN201110378746A CN102404104B CN 102404104 B CN102404104 B CN 102404104B CN 201110378746 A CN201110378746 A CN 201110378746A CN 102404104 B CN102404104 B CN 102404104B
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Abstract
The invention discloses a kind of adaptive synchronicity method and system based on different delayed time mechanism.Wherein, the system includes：Main equipment, for generating response message；Slave unit, link delay and offset phase deviations are calculated to carry out Phase synchronization for after adaptation function is opened, being simultaneously emitted by a variety of latency request messages to main equipment, and according to the response message of return.By means of the invention it is possible to the delay strategy of real-time adaptive upstream network device, Phase synchronization is realized so as to calculate link delay.
Description
Technical field
The present invention relates to the communications field, specifically, more particularly to a kind of adaptive synchronicity based on different delayed time mechanism
Method and system.
Background technology
With the high speed development of modern communication technology, more and more higher is required to the frequency and phase accuracy of network.Current one
As use IEEE 1588v2, i.e. the recovery of PTP (Precision Time Protocol) protocol realization phase and frequency, or
Common realize (SSM recovers frequency, and PTP recovers phase) is realized using SSM and PTP.Between recovering phase, it is necessary to calculate two equipment
Phase difference value, the propagation delay time on time and link is received by the transmission time of Sync messages in PTP protocol at present and is total to
With calculating, therefore it is phase locked committed step to obtain chain-circuit time delay.
In PTP protocol, the calculating of link delay mainly passes through 2 class modes：Delay modes (E2E), Pdelay modes
(P2P)；E2E modes calculate link delay by Sync and Delay-Req, Delay-Resp message；P2P modes pass through
Pdelay_Req, Pdelay_Resp (two-step method also needs to Pdelay_Resp_Follow_Up messages) calculate link delay.Mesh
In the preceding network disposed in the whole network, delay strategy is mainly to be realized at networking initial stage by configuring.
If the recovery of phase is from third party's Network Capture, the configuration modification of that third party's network there may be to present networks
Fatal influence.The delay strategy that the equipment of particularly two adjacent networks is phase locked is inconsistent, then can lead to not calculate
Link delay, so as to which upstream device can not recover phase.
For above-mentioned prior art due to delay strategy inconsistent the defects of leading to not phase recovery in network topology
Problem, there is presently no effective solution.
The content of the invention
It is a primary object of the present invention to provide a kind of adaptive synchronicity method and system based on different delayed time mechanism, with
Solve the problems, such as prior art due to delay strategy inconsistent the defects of leading to not phase recovery in network topology.
To achieve these goals, according to an aspect of the present invention, there is provided a kind of based on the adaptive of different delayed time mechanism
Answer synchronization system.
Included according to the adaptive synchronicity system based on different delayed time mechanism of the present invention：Main equipment, for generating response
Message；Slave unit, for after adaptation function is opened, being simultaneously emitted by a variety of latency request messages to main equipment, and according to
The response message of return calculates link delay and offset phase deviations to carry out Phase synchronization.
Further, the message that is delayed includes the first delay message Delay-Req and the second delay message Pdelay-Req, master
After equipment receives the delay messages of the first delay message Delay-Req and second Pdelay-Req, configured according to main equipment
First response message Delay-Resp or the second response message Pdelay-Resp corresponding to delay strategy generation.
Further, in the case where main equipment is E2E delay strategies, main equipment is receiving the first delay of slave unit
After the delay messages of message Delay-Req and second Pdelay-Req, main equipment generates the first response message Delay-Resp, and
Discarding receives the second delay message Pdelay-Req.
Further, in the case where main equipment is P2P delay strategies, main equipment is receiving the first delay of slave unit
After the delay messages of message Delay-Req and second Pdelay-Req, main equipment generates the second response message Pdelay-Resp,
And abandon and receive a delay message Delay-Req.
Further, system also includes：Transmission clock equipment, is arranged between main equipment and slave unit, for transparent transmission master
Message between equipment and slave unit.
Further, in the case where main equipment and transmission clock equipment are all P2P delay strategies, transmission clock equipment exists
Receive the first delay message Delay-Req and second to be delayed after message Pdelay-Req, the second response that will be directly generated
Message Pdelay-Resp returns to slave unit, and forwards the first delay message Delay-Req to main equipment, and main equipment, which abandons, to be somebody's turn to do
First delay message Delay-Req.
Further, it is E2E delay strategies in main equipment, and in the case that transmission clock equipment is P2P delay strategies, thoroughly
Clockwork is passed after the delay messages of the first delay message Delay-Req and second Pdelay-Req is received, will directly be given birth to
Into the second response message Pdelay-Resp return to slave unit, and forward the first delay message Delay-Req to main equipment,
Main equipment generates and returns to the first response message Delay-Resp to slave unit.
To achieve these goals, according to another aspect of the present invention, there is provided a kind of based on different delayed time mechanism
Adaptive synchronicity method.
Included according to the adaptive synchronicity method based on different delayed time mechanism of the present invention：Open the adaptive work(of slave unit
After energy, a variety of latency request messages are simultaneously emitted by main equipment；Main equipment generates response according to a variety of delay messages of reception
Message, and response message is returned to slave unit；Slave unit calculates link delay and offset according to the response message of return
Phase deviation carries out Phase synchronization.
Further, the message that is delayed includes the first delay message Delay-Req and the second delay message Pdelay-Req, master
After equipment receives the delay messages of the first delay message Delay-Req and second Pdelay-Req, configured according to main equipment
Delay strategy generates corresponding first response message Delay-Resp or the second response message Pdelay-Resp respectively.
Further, before main equipment generates response message according to a variety of delay messages of reception, method also includes：It is logical
Cross transmission clock equipment come transparent transmission slave unit transmission a variety of delay messages, or by transmission equipment generate corresponding to response report
Text, wherein, the response message of main equipment or itself generation is all back to slave unit by transmission clock equipment.
By the present invention, using main equipment, for generating response message；Slave unit, for open adaptation function it
Afterwards, a variety of latency request messages are simultaneously emitted by main equipment, and according to the response message of return calculate link delay and
Offset phase deviations carry out Phase synchronization, solve being led because delay strategy is inconsistent in network topology for prior art
Cause can not phase recovery the defects of problem, and then be capable of the delay strategy of adaptive upstream network device in real time, from
And calculate link delay and realize phase locked effect.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the present invention, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation of the adaptive synchronicity system according to embodiments of the present invention based on different delayed time mechanism；
Fig. 2-3 be according to the slave unit OC of embodiment illustrated in fig. 1 BC adaptive synchronicity schematic diagrames；
Fig. 4-5 is the slave unit P2PTC adaptive synchronicity schematic diagrames according to embodiment illustrated in fig. 1；
Fig. 6 is the flow chart of the adaptive synchronicity method according to embodiments of the present invention based on different delayed time mechanism；
Fig. 7 be with reference to Fig. 1-6 illustrated embodiments upstream be third party's network adaptive synchronicity system structure diagram.
Embodiment
In order that technical problems, technical solutions and advantages to be solved are clearer, clear, tie below
Drawings and examples are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
Fig. 1 is the structural representation of the adaptive synchronicity system according to embodiments of the present invention based on different delayed time mechanism.
As shown in figure 1, the adaptive synchronicity system based on different delayed time mechanism of being somebody's turn to do includes：Main equipment 10, for generating response message；From
Equipment 30, for after adaptation function is opened, being simultaneously emitted by a variety of latency request messages to main equipment 10, and according to return
Response message calculate link delay and Offset phase deviations to carry out Phase synchronization.Wherein, the delay message can wrap
The delay message Pdelay-Req of the first delay message Delay-Req and second are included, main equipment 10 receives the first delay message
After the delay messages of Delay-Req and second Pdelay-Req, according to corresponding to the delay strategy that main equipment configures generates respectively
First response message Delay-Resp or the second response message Pdelay-Resp.
In above-described embodiment, slave unit 30 provides adaptive approach under different delayed time mechanism, can be adaptive in real time
The delay strategy of upstream network device, Phase synchronization is realized so as to calculate link delay.
Fig. 2-3 be according to the slave unit 30OC of embodiment illustrated in fig. 1 BC adaptive synchronicity schematic diagrames；Fig. 4-5 is according to figure
The slave unit 30P2PTC adaptive synchronicity schematic diagrames of 1 illustrated embodiment.
In the above embodiments of the present application, main equipment 10 be E2E delay strategies in the case of, main equipment 10 receive from
After first delay message Delay-Req of equipment 30 and the second delay message Pdelay-Req, the generation of main equipment 10 first should
Message Delay-Resp is answered, and abandons and receives the second delay message Pdelay-Req.
Specific equipment as shown in Figure 2, device A is main equipment 10MASTER ends, and equipment B is slave unit 30Slave, B
Synchronous A equipment.B device opens adaptation function, and B device can send Delay-Req and Pdelay-Req reports simultaneously when starting
Text, because A equipment is E2E delay strategies, therefore, and after the message of B device is received, device A response Delay-Resq messages,
Abandon the Pdelay messages received.Equipment B calculates link delay after response message is received.
In the above embodiments of the present application, main equipment 10 be P2P delay strategies in the case of, main equipment 10 receive from
After first delay message Delay-Req of equipment 30 and the second delay message Pdelay-Req, the generation of main equipment 10 second should
Message Pdelay-Resp is answered, and abandons and receives a delay message Delay-Req.
Specific two equipment as shown in Figure 3, main equipment 10A is P2P mechanism, is receiving slave unit 30B transmissions
After Delay-Req and Pdelay-Req messages, Pdelay-Resp messages can be replied, abandon Delay-Req messages, so as to B device
Link delay is calculated after response message is received.
The technical scheme that embodiment shown in the application above-mentioned Fig. 2 and Fig. 3 uses：Be based on E2E OC BC and P2P OC
Phase is just recovered in the slave unit 30Slave ports of the adaptation function of BC equipment, only PTP, therefore it may only be necessary in slave unit 30
Opened in (slave equipment) adaptive.
In implementation process, system, by BMC algorithms, determines opening up in network first by receiving and dispatching Announce messages
Structure is flutterred, determines slave unit 30 (slave equipment), if slave unit 30 (slave equipment) opens adaptation function, slave
Forward delay interval requires message Delay-Req and Pdelay-Req message simultaneously at end, and now, main equipment 10master ends are whether
Open it is adaptive, all only according to the configuration of the delay strategy of the port response message back and forth, if E2E delay strategies, with regard to response
Back message Delay-Resp messages, if P2P delay strategies, response Pdelay-Resp messages, then slave unit 30Slave
End calculates link delay and offset phase deviations, carries out Phase synchronization according to the corresponding message received.
If adaptive equipment, within the time of setting, link delay can not be calculated, then reporting links alert.
In the above embodiments of the present application, system can also include：Transmission clock equipment 50, it is arranged at main equipment 10 and from setting
Between standby 30, for the message between transparent transmission main equipment 10 and slave unit 30.
Preferably, in the case where main equipment 10 and transmission clock equipment 50 are all P2P delay strategies, transmission clock equipment
50 after the delay messages of the first delay message Delay-Req and second Pdelay-Req is received, will directly generate second
Response message Pdelay-Resp returns to slave unit 30, and forwards the first delay message Delay-Req to main equipment 10, main to set
Standby 10 abandon first delay message Delay-Req.
Specific three equipment as shown in Figure 4, centre are P2PTC, and device A is P2P delay strategies, and equipment C is opened certainly
Adaptive functions.Equipment C sends Delay-Req and Pdelay-Req messages after adaptation function is opened.Transmission clock is set
Standby 50B is P2PTC, after Pdelay-Req messages are received, returns a Pdelay-Resp response message and gives equipment C；Receiving
During Delay-Req messages, directly forward.Because device A is P2P delay strategies, when receiving Dealy-Req messages, can lose
Abandon.Therefore, networking in Fig. 4, the link delay between device A and B receive and dispatch mutually pdelay Receive messages by device A, B,
When Sync is received on transmission clock equipment 50TC, it is put into the correctionField fields of Sync messages, Sync forwardings are passed through
TC equipment delay is also added to Sync corretcionField；Link delay between equipment B, C is also by Pdelay messages
Interaction is obtained, and from the compensation calculation for the delay for completing whole piece link, phase deviation is set so as to obtain.
Preferably, it is E2E delay strategies in main equipment 10, and in the case that transmission clock equipment 50 is P2P delay strategies,
Transmission clock equipment 50, will be straight after the delay messages of the first delay message Delay-Req and second Pdelay-Req is received
The the second response message Pdelay-Resp to deliver a child returns to slave unit 30, and forwards the first delay message Delay-Req to master
Equipment 10, main equipment 10 generate and return to the first response message Delay-Resp to slave unit 30.Moreover, slave unit 30 preferentially makes
Prolonged calculating link with the first response message Delay-Resp of return and offset phase deviations carry out Phase synchronization.
Specifically, as shown in figure 5, the embodiment is similar to Fig. 4, transmission clock equipment 50B is P2PTC, device A E2E
Delay strategy.After equipment C opens adaptation function, while send Pdelay-Req and Delay-Req messages.Now, during transparent transmission
Clock equipment 30P2PTC handles Pdelay messages, forwards Delay messages.In such cases, equipment C can receive Delay- simultaneously
Resp messages and Pdelay-Resp messages.When two class messages can be received, link delay preferentially is calculated using Delay messages,
It is if that the link delay between A and B lacks, and influences synchronization accuracy because being calculated using Pdelay.
Shown in above-mentioned Fig. 4 and Fig. 5 is on the adaptive embodiment of P2P, E2E transmission clock, is set for transmission clock
Standby 50E2ETC, all PTP messages of transparent transmission, therefore E2ETC need not consider the situation；Transmission clock equipment 50P2PTC is due to only receiving
Send out Pdelay messages, forwarding Sync Follow-Up messages, if the both ends delay strategy of the equipment of transparent transmission is inconsistent or both ends are set
Standby is E2E mechanism, also can not be synchronous, or synchronization accuracy is problematic.Therefore, it is necessary to which P2PTC can also forward delay messages.
Delay messages are delayed when by the P2PTC of trigger mechanism adaptation function, it is necessary to compensate device interior, forwarding, no longer
Abandon.
Slave unit 30slave ports in the above embodiments of the present application, it should receive only former generation Delay or Pdelay
Message, if there is a situation where while all receive, it may be possible to the reason for equipment indirect TC equipment, prioritizing selection E2E delays
To calculate corresponding link delay, (preferential the reason for using E2E networking as shown in Figure 4, upstream is the related Delay messages of mechanism
E2E delay strategy equipment, centre are P2PTC situations).
Fig. 6 is the flow chart of the adaptive synchronicity method according to embodiments of the present invention based on different delayed time mechanism.
As shown in fig. 6, this method comprises the following steps：
Step S102, after the adaptation function for opening slave unit 30, a variety of delay messages are simultaneously emitted by main equipment 10.
Step S104, main equipment 10 generates response message according to a variety of latency request messages of reception, and returns to response report
Text is to slave unit 30.
Step S106, slave unit 30 according to the response message of return come calculate link delay and Offset phase deviations come
Carry out Phase synchronization.
In above-described embodiment, slave unit 30 provides adaptive approach under different delayed time mechanism, can be adaptive in real time
The delay strategy of upstream network device, Phase synchronization is realized so as to calculate link delay.
Wherein, the delay message in above-described embodiment can be the first delay message Delay-Req and the second delay message
Pdelay-Req, after main equipment 10 receives the delay messages of the first delay message Delay-Req and second Pdelay-Req, root
The delay strategy configured according to main equipment generates corresponding first response message Delay-Resp or the second response message respectively
Pdelay-Resp。
In the above embodiments of the present application, before main equipment 10 generates response message according to a variety of delay messages of reception,
Method can also comprise the following steps：The a variety of delay messages sent by transmission clock equipment 50 come transparent transmission slave unit 30, or
Person by transmission equipment generate corresponding to response message, wherein, transmission clock equipment 50 by main equipment 10 or itself generation should
Answer message and be all back to slave unit 30.
Fig. 7 be with reference to Fig. 1-6 illustrated embodiments upstream be third party's network adaptive synchronicity system structure diagram.
In Fig. 7,1588v2 third party's network provides as upstream main equipment 10master ends, the downstream network of slave unit 30
Phase, slave unit 30A, B, C are in consolidated network in Fig. 7.As the device A of the phase incoming end of third party's network, because depositing
Potential delay strategy it is inconsistent cause phase it is irreclaimable influence, it is necessary to consider to open adaptation function in device A.
Device A can be OC, BC equipment, and adaptive application scenarios lead to shown in Fig. 2 and Fig. 3, and now starting adaptation function in device A is
Can, downstream device A provides phase to third party's network, while device A transmits phase to equipment B and C；Device A can also be
Shown in biography clockwork 50 (TC), adaptive application scenarios as Fig. 4 and Fig. 5, immediately upstream device B, C of TC equipment are required for out
Adaptive functions are started from, if device A is P2PTC equipment, device A should also start adaptation function, and (i.e. device A, B, C are required to
Open adaptive), if device A is E2ETC, only need B, C to open adaptation function.
It should be noted that the embodiment of the present invention can be in such as one group of computer the flow of accompanying drawing illustrates the step of
Performed in the computer system of executable instruction, although also, show logical order in flow charts, in some situations
Under, can be with the step shown or described by being performed different from order herein.
In embodiment description more than, it can be seen that the present invention realizes following technique effect：Solves prior art
Due to inconsistent the defects of the leading to not phase recovery problem of delay strategy in network topology, and then can be real-time
Adaptive upstream network device delay strategy, realize phase locked effect so as to calculate link delay.
Obviously, those skilled in the art should be understood that above-mentioned each module of the invention or each step can be with general
Computing device realize that they can be concentrated on single computing device, or be distributed in multiple computing devices and formed
Network on, alternatively, they can be realized with the program code that computing device can perform, it is thus possible to they are stored
Performed in the storage device by computing device, either they are fabricated to respectively multiple integrated circuit modules or by they
In multiple modules or step be fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific
Hardware and software combines.
A preferred embodiment of the present invention has shown and described in described above, but as previously described, it should be understood that the present invention
Be not limited to form disclosed herein, be not to be taken as the exclusion to other embodiment, and available for various other combinations,
Modification and environment, and above-mentioned teaching or the technology or knowledge of association area can be passed through in the scope of the invention is set forth herein
It is modified., then all should be in this hair and the change and change that those skilled in the art are carried out do not depart from the spirit and scope of the present invention
In the protection domain of bright appended claims.
Claims (7)
- A kind of 1. adaptive synchronicity system based on different delayed time mechanism, it is characterised in that including：Main equipment, for generating response message；Slave unit, for after adaptation function is opened, being simultaneously emitted by a variety of latency request messages to the main equipment, and root Link delay and offset phase deviations are calculated to carry out Phase synchronization according to the response message of return；Wherein, the delay message includes the first delay message Delay-Req and the second delay message Pdelay-Req, the master After equipment receives the first delay message Delay-Req and the second delay message Pdelay-Req, set according to master The delay strategy of standby configuration generates corresponding first response message Delay-Resp or the second response message Pdelay- respectively Resp, including：In the case where the main equipment is E2E delay strategies, the main equipment is receiving described the first of the slave unit It is delayed after message Delay-Req and the second delay message Pdelay-Req, the main equipment generates first response Message Delay-Resp, and abandon and receive the second delay message Pdelay-Req；OrIn the case where the main equipment is P2P delay strategies, the main equipment is receiving described the first of the slave unit It is delayed after message Delay-Req and the second delay message Pdelay-Req, the main equipment generates second response Message Pdelay-Resp, and abandon and receive the first delay message Delay-Req.
- 2. system according to claim 1, it is characterised in that the system also includes：Transmission clock equipment, it is arranged between the main equipment and slave unit, for main equipment described in transparent transmission and the slave unit Between message.
- 3. system according to claim 2, it is characterised in that be all in the main equipment and the transmission clock equipment In the case of P2P delay strategies, the transmission clock equipment is receiving the first delay message Delay-Req and described the After two delay message Pdelay-Req, by the second response message Pdelay-Resp directly generated return to it is described from Equipment, and forward described first to be delayed message Delay-Req to the main equipment, the main equipment abandons the first delay message Delay-Req。
- 4. system according to claim 2, it is characterised in that in the main equipment it is E2E delay strategies, and the transparent transmission In the case that clockwork is P2P delay strategies, the transmission clock equipment is receiving the first delay message Delay- After Req and the second delay message Pdelay-Req, the second response message Pdelay-Resp directly generated is returned Back to the slave unit, and the first delay message Delay-Req is forwarded to generate and return to the main equipment, the main equipment The first response message Delay-Resp is returned to the slave unit.
- 5. system according to claim 4, it is characterised in that the slave unit is preferentially using first response returned Message Delay-Resp prolongs calculating link and Offset phase deviations carry out Phase synchronization.
- A kind of 6. adaptive synchronicity method based on different delayed time mechanism, it is characterised in that including：After the adaptation function for opening slave unit, a variety of latency request messages are simultaneously emitted by main equipment；The main equipment generates response message according to a variety of delay messages of reception, and returns to the response message to described from setting It is standby；The slave unit calculates link delay and Offset phase deviations to carry out phase according to the response message of return Bit synchronization；Wherein, the delay message includes the first delay message Delay-Req and the second delay message Pdelay-Req, the master After equipment receives the first delay message Delay-Req and the second delay message Pdelay-Req, according to described The delay strategy of main equipment configuration generates corresponding first response message Delay-Resp or the second response message Pdelay- respectively Resp, including：In the case where the main equipment is E2E delay strategies, the main equipment is receiving described the first of the slave unit It is delayed after message Delay-Req and the second delay message Pdelay-Req, the main equipment generates first response Message Delay-Resp, and abandon and receive the second delay message Pdelay-Req；OrIn the case where the main equipment is P2P delay strategies, the main equipment is receiving described the first of the slave unit It is delayed after message Delay-Req and the second delay message Pdelay-Req, the main equipment generates second response Message Pdelay-Resp, and abandon and receive the first delay message Delay-Req.
- 7. according to the method for claim 6, it is characterised in that given birth in the main equipment according to a variety of delay messages of reception Into before response message, methods described also includes：The a variety of delay messages sent by transmission clock equipment come slave unit described in transparent transmission, or set by the transparent transmission Response message corresponding to standby generation, wherein, the transmission clock equipment generates the main equipment or the transmission clock equipment Response message be back to the slave unit.
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| CN103763055B (en) * | 2013-10-18 | 2016-05-18 | 杭州联汇数字科技有限公司 | The method of precise synchronization time a kind of |
| CN106464656B (en) | 2014-12-16 | 2020-02-21 | 华为技术有限公司 | Time synchronization method and device |
| CN105516342B (en) * | 2015-12-30 | 2019-02-22 | 深圳市有信网络技术有限公司 | A kind of P2P penetrates synchronous method and system |
| CN112667551B (en) * | 2021-03-17 | 2021-07-06 | 武汉精立电子技术有限公司 | QSPI data transmission method and system based on phase self-adaptation |
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| CN101459502A (en) * | 2007-12-13 | 2009-06-17 | 华为技术有限公司 | Method and apparatus for network clock synchronization |
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| CN101299749A (en) * | 2007-04-30 | 2008-11-05 | 华为技术有限公司 | Method and apparatus for transferring clock between networks |
| EP2262158A1 (en) * | 2008-06-23 | 2010-12-15 | Huawei Technologies Co., Ltd. | Processing method and system for correction field information |
| EP2377256A1 (en) * | 2008-12-09 | 2011-10-19 | Alcatel Lucent | Clock for a node of a packet-switched network and associated synchronisation method |
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