WO2010149045A1

WO2010149045A1 - Method and system for clock synchronization of broadband over power line nodes, and management node thereof

Info

Publication number: WO2010149045A1
Application number: PCT/CN2010/074337
Authority: WO
Inventors: 吴冬凌; 曹海萍; 尚锐
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-12-10
Filing date: 2010-06-23
Publication date: 2010-12-29
Also published as: CN102098205B; CN102098205A

Abstract

The invention discloses a method and system for clock synchronization of Broadband over Power Line (BPL) nodes, and also discloses a management node. The method includes: A master clock is set as the management node of a power line network, after an ordinary node which needs to synchronize its clock identifies the master clock according to an announce message sent by said management node, the ordinary node acting as a slave clock requests a fixed transmission opportunity from the management node; the management node includes a synchronization message into a transmission opportunity allocation message broadcasted periodically, and includes the fixed transmission opportunity allocated for the ordinary node into the latest transmission opportunity allocation message, and then sends the message to the ordinary node; when the ordinary node receives the synchronization message, the ordinary node sends a delay measurement request message on the fixed transmission opportunity allocated. The invention reduces the interval between the sending timestamp of an IEEE 1588 message and the actual time of arrival at the power line network of the IEEE 1588 message, and improves the precision of IEEE 1588 clock synchronization.

Description

Synchronization method and management and management

This relates to the time synchronization method and management of the communication cable, especially BP oadb dOve owe 5 e ). Background

The communication wood has been different for ten years in the mutual strength of Muyou. At high (35 V to ),

In the various fields of 0 (-35k) and low (below V), the communication is not high and the communication (BP) wood provides higher speed. The indoor base of the BP is the one of the BP wood. It uses the P of each communication to complete the solution function, so its force P.

5 indoor base GP Goba os og yse, full positioning synchronization performance is a very good performance, but for various reasons indoor base is likely to be unable to receive GPS directly. The alternative available is EEE ( e O EeC c dEec oc E g Ee and dice engineering 1588 (precision synchronization of measurement and control systems) Synchronously synchronize information.

BP A includes management and ordinary can be BP, etc.) and all cities P need to be within management misallocation

Same as. The management cycle and the distribution message are each.

The GPS can not be received, but the GP synchronization can be synchronized by 5 E 88, that is, the 1588 synchronization can be received by the other medium. In the case of sending God, SaV and 1588 are synchronized with ase). 1 shown 11 12 synchronized process cycle pass (A oc ), synchronization (Sy) message and o1ow) message, its A ce message, Sy c message and Fo ow p message: 1588 message and, in the case of Sy c message, put this message with the message received message The force is received by the yc message itself, the Sc message is received with the mercury, the measurement message eay-e) is the same as the mercury, and the receipt of the deferred measurement message will receive the synchronization message in the elapsed measurement message (e-Resp) The interaction is complete, using the resulting rows locally to sync. The synchronization performance, and the evil in P is that waiting for the idle waiting time may be very large, and the message to the message is received with the same extension and the culture of its own is the main synchronization of 1588. The factors, so grounded, are largely synchronized with 1588.

At present, the P fb 88 synchronization function is available in the way. The function of the EEE 88 sync phase is completed on the P card; 2 The function of the EE 88 sync phase is completed.

The above scheme has the following limitations:

The limitation of the former is that the synchronization must be matched with the BP with E E 88 function, and the external dependencies are too far.

The synchronization of the users reduces the dependence of the external solids. However, since the EE 88 message is etheric AC (the eda Access Co o is controlled to P, it is often necessary to wait for the management of the allocations to be combined, so the EE 88 message is too AC. Send to EEE 588 message

It's very big and the EEE 88 message is in the etheric AAC. Therefore, the same phase difference as the E 588 message is the same, so the gods program

Very low. As mentioned earlier, the performance of the synchronization.

2 Separation of the E 88 message. EE 588 message at E 588 PTP ( ecso Tme ooco precision) and P (se a Pooco, number of users), P is composed of Ethernet AC in Ethernet, AC, AAC, AAC, Ethernet, PY hysca aye, and BP. The receiving BP then sends the parsed Ethernet AC received to the Ethernet AC up to 88 (ie PTP).

The one cycle shown in Figure 3 is the same as the other. , Management Period Assignment Message In Assignment Message), this message contains the allocation indication information in the next period. In the period, the segments of the assigned message (ie, each other) are generally in accordance with the allocation instructions. If the message is normal to the E E 88 message, then the message is queued in the BP AC until the management is assigned. The message AAC may be the same. The waiting for the same message is the same reason for the same message. Content

The wood to be solved is the synchronization method and the management and management provided, which can improve and improve the synchronization accuracy of E E 88.

To solve the synchronization method provided by the above, the method

In the management , the general management of the news that needs to be synchronized is not selected , and the force is fixed ;

The management includes the synchronization message included in the periodic allocation message, and the fixed combination of the force general allocation is included in the latest one of the allocation messages; Normally received synchronization messages measure messages on fixed allocations.

, manages the period of the synchronization message by a multiple of the period.

In the allocation that manages the inclusion of the synchronization in the cycle, the fixed allocation of the force is included in the usual allocation of the usual steps.

The management will be followed by the synchronization message contained in the intra-period, which is included in the assigned period, and the synchronization message within one period.

The managed message is included in the period of the allocated message and the period of the message is greater than the synchronization period.

The steps taken to manage the receipt of ordinary fixed and combined information include

Management preserves common mercury and generally distributes it during the period of preserving ordinary mercury.

The management has the same or the same in the period of the periodic distribution and the resultant period, and the same allocation of the same distribution has a minimum.

In the general measurement of the message, the method includes

The management received the normal reception will be included in the measurement, and the distribution is normal.

This provides a synchronous master management, and the need to synchronize the common, which

Management, cycle pass, include synchronization in the allocation of the cycle, and receive the normal fixed Message, the general allocation of the fixed is included in the most recent assignment message, ordinary

In the normal, the managed communication message is sent to the fixed and closed measurement message when the synchronization message is received.

The management will include the message in the period of the assigned message, and the synchronization within the previous period in the message will be synchronized.

The management is to include the communication message in the period of the combined message, and the period of the communication message is greater than the period of the synchronization message.

The management mercury receives the reception of the ordinary measurement message, and includes the reception

Assign the message to the normal.

To solve the problem, this provides a management, management, and periodic communication message, which includes the synchronization message in the periodic allocation message; and the normal fixed message is received in the last allocation message, usually in the ordinary The ordinary said message is sent to the management to fix the received synchronization message on the fixed extension of the measurement message.

The management will include the message in the period of the combined message, and the follow-up message in the period carries the synchronization message in the upper period.

The managing is to include the communication message in the

In the allocation message, the period of the message, the period of the message is greater than the period of the synchronization message.

The management of the ordinary received by the mercury Receive the measurement message, include the reception in the extension measurement, and combine the message with the common city

The synchronization method and the management provided by this method reduce the T E 88 message to the same time and improve the EEE 88 synchronization precision. solid

Schematic representation of the interaction of E 88 messages in 1

2 E 88 indication

3 Existing EEE 88 way of wood

4 The management of the book is in the cycle of the unfriendly message

EE 88 y c interest rate;

The management of 5 Ebens is in the cycle of communication E 88Sy c message way

6力本中中延退退 e e e e e e e e e e

7力本中 E 8 interaction flow diagram. The preferred way of this

The basic idea of this is to include the E 88 message in the periodic allocation message to reduce the wait for the message, less EE 88

To the same as the ether P Y , and make EE 88

The time to arrive is closer, and the EEE 88 synchronization is improved in one step.

In the above thinking, the following wood scheme is used.

Will (the management in ase requires EE 88 The common management of the time-synchronized management is fixed and combined;

Management includes the Sy c message in the allocation of the period, and the fixed allocation of the Liputong is included in the most recent allocation;

Normally, when the y c is received, the fixed and closed are allocated.

Measure e -Req) messages.

Its synchronization can be divided into the following steps:

The step will provide the management of the main time ( e ) of the function, the period of the assigned message

Steps, managing periodic Sy c messages, passing messages and following messages, where Sy c and messages are 吋, y c is followed by messages, followed by Sy c , followed by messages and Sy c

Assign the same message. Sy c and the cycle of the message in the same step as the cycle of the message are doubled. The cycle of the message is much larger than yc, and can be doubled by the Sy c message cycle. For example, the Sy c message is 32 per second. 2 per second.

Steps to receive the message and send the nuclear message to the person;

Step, to manage, that is, in each cycle

Step , management is to receive the message , save

The step is still in the allocation message in the cycle. The Sy c message and the follow-up message are assigned in the subsequent cycle.

The assignment message is specified within this period;

The allocation contains the assigned ones, among them, EEE 88, which includes other non-EE 88 ordinary. In addition, the following in the period is the yc in the upper period, that is, the yc message in the previous period.

Step , same , cycle still communicates the message to

Ordinary in the middle

Step , time god , received y c message and message received Sy c message in the foot of the wood

Steps when God receives the message that the mercury receiving is included in the middle

Messages can be there, do not need to be fixed, which is received, even if waiting for reception.

Step 10 Receive the message So far, the synchronization message interaction is completed.

This will delay the receipt of y c

If the ratio has been determined, cancel the fixed and closed periods in the cycle, otherwise the steps are up to ten.

What is needed is that, in the case of receiving the message in the cycle, it is fixed, and this is increased.

Mercury, distributed during the cycle.

The following will be combined with the rest of the step.

In this case, 4 and EE 88 are synchronized with each other. The management ae is the same as the periodic allocation, and the EE 88 yc message is sent out. Since the cycle of the E 88 synchronization is the same, the E 88 Sy c message is in the Ethernet AAC. Solid, PY BP AAC has to wait, directly to improve the EE yc message.

In this soldier, it is assigned the same as Sy c. 4 Managed E 88 Sy c interest during the period of the unfriendly message In this case, the combination has yc and the accompanying message. In addition, 4 shows a fixed period of aVe and Sa e2, including the distribution of the gods

. It can be fixed at other times and at any time.

In addition, the management will send messages to the &, and 16Sy c messages every cycle. 5 Management E E 588 y c in the period of the message, this allocation with y c , follow and message.

6 E E 88 eay-Req extension

The way the message is. The normal EE 588 synchronization function will be fixed, and each time the fixed core is allocated, there are other non-EE 88, and the interval between the other fixed allocation messages is larger than the synchronization message period. The incompatibility of EEE 88 messages is not the same.

In the following, the E 588 message reciprocal force of the common fish that is synchronized with the management and the requirements, is a step of the technical solution.

As shown in Figure 7, the synchronization method includes the following steps

Step 1, managing the period of E 88 , y c interest;

In this, the management of the master is the same as the synchronization message.

A multiple of the allocation period.

Step 2 requires the synchronization function to be fixed to the management of the master ;

Step 3: The management period ( ) y c , the y c message is included in the distribution, and is sent to the allocation message containing the solid allocation of God;

Hugh managed Ether E 88 to encapsulate this power AC in proximity to Ether PY, Sy c message AAC to P to connect this to the AC in the P AC will yc message The same assignment message in the AC and the next P-serving cycle is encapsulated into BP, BP Y, and medium.

In conjunction with 4 and 5, in the fixed allocation of the allocation, the Sy c message is received to the e - eq message, so it is needed

The aVe 1588 of the allocation of the combined message has a certain same, and the minimum can be 1 or 2.

Step 4, receiving the y c message, the eayReq message, on the fixed allocation;

Hugh includes the yc message received by BP PY, P is sent to Ether PY to Ether AAC, P, P is separated to EE 88, and the message is completed in EE 88, and the measurement message is sent back to P, P. Ethereum AC is coming to Ether PY,

Will be encapsulated into the Ether AAC's deferred measurement message P to P AAC, where the AAC maps the message to the one assigned in step 3, BP Y to

Step 5 Management receives the measurement message and delays the measurement ( eay-Res ) in the combined message ;

Step 6. Step 3 to Step 5.

The present invention provides management, the above management, the periodic communication includes the synchronization message in the periodic allocation message; and, when receiving the normal fixed message, the ordinary allocation is fixed in the latest allocation message, which is normal; Normally, the message is not sent out, and the management is fixed upward; the measurement message is delayed on the above fixed transmission when the above synchronization message is received.

The upper management will include the message in the upper allocation message cycle, where the synchronization message in the period with the synchronization period in the message

The upper management is to include the upper communication message in the above-mentioned allocation message, and the period of sending the communication message is greater than the synchronization. The above management, receiving the above-mentioned ordinary extension message received by the mercury, including the above reception in the extension measurement,

Harmony Assignment Messages Above General.

The functions of the management in the upper management system are the same and will not be described here. The synchronization method and the management provided by this method reduce the synchronization of the T E 88 message and improve the synchronization precision of the EEE 88.

This ordinary wood can understand all or part of the steps in the method. The program can not be completed by hardware. The program can be stored in storable memory only, or so on. Yes, all or part of the above steps can also be used or integrated. Phases, each of the above / sheep can be in the form of hardware or software functions. This is not limited to any specific form of hardware or software combination.

The above is not used to limit the Mudong said in this field, there can be more and more. Any repairs, equivalent substitutions, etc. made in the spirit of this book are included in this warranty. Usability

The synchronization method and the management provided by the present invention include the 88 message in the periodic allocation message to reduce the waiting of the message, and reduce the EE 88 message to the same as the Ethernet PY, so that the E 88 message is similar to the 仟, And improved the E 88 synchronization accuracy.

Claims

Claim

Synchronization method

The main management in the main management , the general management of the communication that needs to be synchronized , and the work force is fixed ;

Management to include the synchronization message in the periodic union message. The fixed allocation of the Litong is included in the latest allocation message, and is common;

Normal Receive Synchronization Messages Measure messages on assigned fixes.

2 The method described in claim 1, wherein

The period of managing the synchronization message is equal to the period of the combined message.

3. The method of claim 1 or 2, wherein, in the unified allocation message of the management, the synchronization message is included in the periodic allocation message, in the common allocation step, in the common steps

The management will include the message in the period of the assigned message, in which the synchronization message of the period in the message is in the period.

4, 1 method, where,

The managed communication message is included in the allocation message, and the period of the communication message is greater than the period of the synchronization message.

5. The method of claim 2, wherein

In the step of managing receipt of the ordinary fixed message, the method includes

The management of the preservation of ordinary mercury is generally described in the period of preserving ordinary mercury. Wherein, the management has the same minimum between the same or different inter-allocation messages in the period of the periodic allocation.

6. The method described in claim 1, wherein in the step of generally delaying the measurement message, the method includes

The management of the mercury received by the ordinary message is included in the measurement, and the combined message is described as normal.

7, the synchronization system, including the management of the master and the common need to synchronize

The management, the periodic communication message, the synchronization message is included in the periodic and the distribution message, and the normal fixed message is received, and the normal allocation of the fixed and the combined information is included in the latest allocation message.

Ordinary, managed communication messages are sent to the management fixedly. When the synchronization message is received, the measurement message is delayed on the fixed allocation.

8 The system described in claim 7, wherein

Management Near, the message is included in the cycle of the assigned message, where the message in the cycle carries a synchronization message within a period of the message.

9 requires the system described in 7 or 8, wherein

Management Yes, the communication message is included in the allocation message period, and the period of the communication message is greater than the period of the synchronization message.

0, the system of requirement 9, where

The management, the receipt of the common delay measurement message by the mercury is received in the same

Assign messages to normal. 1. Management, management, and periodic communication messages will be included in the cycle's combined allocation to receive the normal fixed and combined messages.

It is included in the most recent assignment message; so that the normal communication message is not fixed to the management. When the synchronization message is received, the measurement is delayed on the fixed transmission.

2. The management of requirement 1 , where

Management Near, the message is included in the cycle of the assigned message, where the synchronization message with the mediation period in the cycle is fixed.

13. Requirements 11 or 12 management, where

Management Yes, the pass message is included in the cycle of the combined message, and the pass period is greater than the period of the synchronization message.

4. The management of requirement 3, where

Management, the reception of ordinary measurement information received by mercury, and the inclusion of the reception in the extension measurement,

Assign normal.