CN101938318A - Synchronous method, system and convergent ring device among devices in convergent network - Google Patents
Synchronous method, system and convergent ring device among devices in convergent network Download PDFInfo
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- CN101938318A CN101938318A CN2010102863055A CN201010286305A CN101938318A CN 101938318 A CN101938318 A CN 101938318A CN 2010102863055 A CN2010102863055 A CN 2010102863055A CN 201010286305 A CN201010286305 A CN 201010286305A CN 101938318 A CN101938318 A CN 101938318A
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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
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0658—Clock or time synchronisation among packet nodes
- H04J3/0673—Clock or time synchronisation among packet nodes using intermediate nodes, e.g. modification of a received timestamp before further transmission to the next packet node, e.g. including internal delay time or residence time into the packet
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/42—Loop networks
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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
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0658—Clock or time synchronisation among packet nodes
- H04J3/0661—Clock or time synchronisation among packet nodes using timestamps
- H04J3/0667—Bidirectional timestamps, e.g. NTP or PTP for compensation of clock drift and for compensation of propagation delays
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Abstract
The invention provides a synchronous method, a system and a convergent ring device among devices in a convergent network. The method comprises the following steps of: ensuring a port type of the current port by the convergent ring device, wherein the convergent ring device is provided with the functions of a boundary clock and a transparent clock, the port type comprises a main port, a secondary port and a service port, and the service port is connected with an access ring; and processing a PTP (Precision Time Synchronization Protocol) message according to the determined port type by the convergent ring device to synchronize the devices in the convergent network. The invention solves the problem of poor synchronicity among the devices in the convergent network, simplifies the synchronous operation among the devices in the convergent network and increases system performance.
Description
Technical field
The present invention relates to the communications field, method for synchronous, the system of equipment room and converge ring apparatus in a kind of convergence type network.
Background technology
At present, in the communication network equipment room comprise two kinds synchronously: a kind of is Frequency Synchronization, promptly, the signal of source end and destination keeps certain specific relation on frequency or phase place, Frequency Synchronization also is called clock synchronization usually, and for example, synchronous ethernet, E1 interface clock are synchronous etc.; Another kind is time synchronized synchronously, that is, not only frequency is identical, and phase place is also identical, and has identical time numeration scale.
IEEE (Institute for Electrical and Electronic Engineers, Institute of Electrical and Electronics Engineers) formulated " Precision Time Protocol " (Precision Time Protocol is called for short PTP or 1588v2) that is applied to network measure and control system.PTP adopts the measuring principle in path delay by the mode based on bag, adjusts time deviation and frequency departure from clock and master clock, realization master clock and from time between the clock and Frequency Synchronization.
The basic function of PTP is each nodal clock that makes in the distributed network, and holding frequency and time is synchronous in certain precision.Four kinds of fundamental clock types that can be used for networking between principal and subordinate's clock are provided in the PTP standard: boundary clock (BC, Boundary Clock), ordinary clock (OC, Ordinary Clock), transparent clock (TC, Transparent Clock), ordinary clock+boundary clock is (with " OC+TC " expression, refer to that this equipment had both had the characteristic of ordinary clock, also had the characteristic of transmission clock).In distributed network, these four kinds of clock types can mixed networking, with satisfy equipment room synchronously.
And when actual networking, what operator adopted sometimes is not distributed network, converges the form of hanging several access looped networks under the looped network but can plan networking to one, and this networking mode is called the convergence type network.For more performance and safer simple management are provided, the equipment in the convergence type network need be supported following characteristic:
1: converge ring apparatus and directly be synchronized with grandfather's clock (GM, Grandmaster Clock) equipment, this just need converge ring apparatus can do boundary clock (slave unit), can go up other equipment for ring the PTP message transmission again.
2: converge the port that ring apparatus connects access ring equipment and need provide clock time, wish that therefore this port forces into the master port for access ring equipment; And this port can be blocked access ring and the 1588v2 message interaction that converges other equipment of ring.
Above-mentioned four kinds of clock types all can not satisfy above-mentioned two characteristics well, cause intrasystem equipment room synchronism relatively poor.
Summary of the invention
Main purpose of the present invention is method for synchronous, the system of equipment room in a kind of convergence type network to be provided and to converge ring apparatus, to solve the relatively poor problem of synchronism of equipment room in the above-mentioned convergence type network at least.
According to an aspect of the present invention, provide the method for synchronous of equipment room in a kind of convergence type network, having comprised: converged the port type that ring apparatus determines to work as front port; Wherein, converge the function that ring apparatus disposes boundary clock and transparent clock; Port type comprises master port, from port and serve port, serve port is the port that links to each other with access ring; This converges ring apparatus and handles Precision Time Protocol PTP message according to the port type of determining, makes that equipment room reaches synchronous in the convergence type network.
According to a further aspect in the invention, provide a kind of ring apparatus that converges, having comprised: the port type determination module is used for definite port type when front port; Wherein, converge the function that ring apparatus disposes boundary clock and transparent clock; Port type comprises master port, from port and serve port, serve port is the port that links to each other with access ring; Message processing module (MPM), the port type that is used for determining according to the port type determination module is handled Precision Time Protocol PTP message, makes that equipment room reaches synchronous in the convergence type network that converges the ring apparatus place.
According to another aspect of the invention, provide a kind of convergence type network system, having comprised: converged ring apparatus and access ring equipment; Converging ring apparatus comprises: the port type determination module is used for definite port type when front port; Wherein, converge the function that ring apparatus disposes boundary clock and transparent clock; Port type comprises master port, from port and serve port, serve port is the port that links to each other with access ring; Message processing module (MPM), the port type that is used for determining according to the port type determination module is handled Precision Time Protocol PTP message, makes that equipment room reaches synchronous in the convergence type network system; Access ring equipment comprises: synchronization module, be used for handling the PTP message according to the port type of its port, and the clock type of access ring equipment is boundary clock or transparent clock, the port type of access ring equipment comprises master port and from port.
By the present invention, new clock type BC+TC is disposed in employing on convergence device, and carry out simultaneous operation based on the type, solved the relatively poor problem of synchronism of equipment room in the convergence type network, strengthened the robustness of network time synchronization, simplify the simultaneous operation of equipment room in the convergence type network, improved systematic function.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the method for synchronous of equipment room in the convergence type network of the embodiment of the invention;
Fig. 2 is the structural representation that compiles ring apparatus according to the embodiment of the invention;
Fig. 3 is the structural representation according to the convergence type network of the embodiment of the invention;
Fig. 4 is the structured flowchart that compiles ring apparatus according to the embodiment of the invention;
Fig. 5 is the structured flowchart according to the convergence type network system of the embodiment of the invention.
Embodiment
Hereinafter will describe the present invention with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
The present invention considers the network construction characteristic and the demand of convergence type network, has introduced new clock type, i.e. boundary clock+transparent clock, and the equipment that disposes this clock type has the function of boundary clock and transparent clock.Based on this, the embodiment of the invention provides method for synchronous, the system of equipment room in a kind of convergence type network and has converged ring apparatus.
Fig. 1 shows the flow chart according to the method for synchronous of equipment room in a kind of convergence type network of the embodiment of the invention, and this method may further comprise the steps:
Step S102 converges the port type that ring apparatus determines to work as front port;
Wherein, converge the function that ring apparatus disposes boundary clock and transparent clock (with " BC+TC " expression); Port type comprises master port (master port), from port (slave port) and serve port (server port), serve port is the port that links to each other with access ring;
Convergence device can determine to work as the type of front port according to the information in the configuration file, and the information such as clock type that self dispose.
Step S104 converges ring apparatus and handles the PTP message according to the port type of determining, makes that equipment room reaches synchronous in the convergence type network.
In the present embodiment, the message processing mode that dissimilar port is corresponding different, for example, when converging port type that ring apparatus determines when being serve port, step S104 comprises: send the PTP message that generates from deserving front port, abandon and deserve the PTP message that front port receives.
Preferably, at the network construction characteristic of convergence type network, carry out equipment room synchronously before, promptly before the above-mentioned steps S102, said method also comprises following configuration:
1) clock type of the access ring equipment on the configuration access ring is boundary clock or transparent clock, and wherein, transparent clock is point-to-point (P2P, Peer to Peer) transparent clock or end-to-end (E2E, End to End) transparent clock;
According to this configuration, access ring equipment will be handled the PTP message according to the port type of its port, and the port type of this access ring equipment comprises master port and from port;
2) transmission deviation hung down of configuration access ring equipment (TD, TransmissionDeviation) clock type of base station is an ordinary clock;
3) disposing the clock type that converges ring apparatus that does not connect access ring in the convergence type network is boundary clock.Wherein, this time source that converges ring apparatus that does not connect access ring is from global positioning system (GPS, Global Positioning System), and as the GM clock of convergence type network;
4) the clock PTP port status selection algorithm of the equipment in the configuration convergence type network is best master clock (BMC, a Best Master Clock) algorithm;
According to this configuration, the above-mentioned ring apparatus operation BMC algorithm that converges selects a port for from port from this converges the port of ring apparatus, and at least one port is a master port, and to select at least one port from master port be serve port.The described BMC algorithm of access ring equipment operation on the access ring, selecting a port from the port of access ring equipment is from port, all the other ports are master port.
It is one of following that PTP message in the present embodiment comprises: announcement (Announce) message, (Sync) message, stream report (flow_up) message, time-delay request (DelayReq) message and time-delay response (DelayResp) message synchronously.
Referring to the internal structure schematic diagram that compiles ring apparatus shown in Figure 2, this equipment comprises 1588 protocol stack modules, BMC algoritic module and message switching module, and wherein, the BMC algoritic module is used to move the BMC algorithm, judges the type of each PTP port on the nodal clock; The PTP protocol stack module is used for generating and handling the PTP message; The message switching module is used to judge the type and the port type of message, and does corresponding processing according to different types.Wherein, at above-mentioned message, the performance that each port has is as follows:
From port (Slave port), need be transparent to other master port (being the master port) for Sync message of receiving and flow_up message, and deliver to 1588 protocol stack modules simultaneously.Only doing transparent transmission for the DelayReq message of receiving handles.For the DelayResp message of receiving, need by purpose clock sign (ClockID) termination and on send the processing of 1588 protocol stack modules; Only doing transparent transmission for the unmatched DelayResp message of purpose ClockID handles.1588 messages that send for 1588 protocol stack modules normally send.
Serve port (Server port), all 1588v2 messages of receiving terminate on this port (can not transparent transmission, prevent that subordinate's 1588 messages from traversing in the higher level 1588v2 network), must abandon for the Announce message of receiving, prevent that the BMC algoritic module is calculated to be the Slave port with this port; Transferring to 1588 protocol stack modules for the normal DelayReq message of receiving or other redundant 1588v2 message handles or abandons.Do not do to filter (comprising Announce, Sync, Flow_Up, DelayResp) for the message that 1588 protocol stack modules send.
Master port (Master port), for the Announce message of receiving need transparent transmission and on send 1588 protocol stack modules, participate in the computing of BMC algorithm.Only need do transparent transmission for the Sync that receives, Flow_Up, DelayReq, DelayResp message handles.The Announce message that sends for platform need normally send.Though it is the Master port that the BMC algoritic module calculates this port, this port does not send the Sync message.
Present embodiment passes through the new clock type BC+TC of configuration on convergence device, and carries out simultaneous operation based on the type, has solved the relatively poor problem of synchronism of equipment room in the convergence type network, has strengthened the robustness of network time synchronization.And access ring equipment will can not influence the time synchronized that converges ring apparatus by above-mentioned configuration, makes the time synchronized of equipment room in the convergence type network reach the layering processing, promptly can only is provided to access ring equipment the time by converging ring apparatus.Simplify the simultaneous operation of equipment room in the convergence type network, improved systematic function.
Embodiment 1
Present embodiment is that example describes with convergence type network shown in Figure 3, and wherein, equipment 1,2,3,4 and 5 is for converging ring apparatus, and the GE access ring one, GE access ring two, GE access ring three and the GE access ring four that hang with up and down at equipment 3,4 and 5.Equipment on the GE access ring is access ring equipment, the clock type that disposes in the clock type that converges ring apparatus and access ring equipment disposition and the foregoing description is identical, that is: converge ring apparatus 1 and 2 among Fig. 3 and be set to the boundary clock function, equipment 3,4,5 are set to boundary clock+transparent clock function (as the E2E transparent clock).The access ring all devices all is set to boundary clock.All descend to hang a TD base station at access ring equipment, the TD base station is set to ordinary clock.All PTP equipment all use step clock (one-step clock) pattern of 1588v2 definition.
1. network shown in Figure 3 is a clock synchronization compliant with precision time protocol territory, and Time delay measurement mechanism in territory is the E2E mode.In this clock zone, boundary clock, ordinary clock, boundary clock+transmission clock is all enabled the BMC algorithm.
2. the time source of the boundary clock of equipment 1 is from GPS, and is the GM clock in this PTP territory.According to the BMC algorithm, the port on its link is as the master port.This port sends Announce message and sync message, and response DelayReq message, promptly sends the DelayResp message.
3. on the nodal clock that converges the equipment 3,4,5 on the ring, specifying the port that links to each other with access ring equipment is the server port.This nodal clock operation BMC algorithm, can select one of them port is the slave port, a port is the master port.Such as for equipment 4, port2 is the slave port, and port1 is the master port, and port3 and port4 are the server port; Then equipment 4 time synchronized are in equipment 1.
4. the equipment 4 that converges on the ring is handled message according to the type of port, is example with the ring apparatus that compiles shown in Figure 2, and at different port types, the processing of each module participation message is as follows:
Port2: receive Announce and sync message, on deliver to 1588 protocol stack modules, and be forwarded to the port1 port.Receive the DelayReq message and be forwarded to port1.Receive the DelayResp message, for delivering to 1588 protocol stack modules on the purpose ClockID coupling, the unmatched port1 that is forwarded to sends Announce and DelayReq message that 1588 protocol stack modules generate.
Port1: receive the Announce message and on send 1588 protocol stack modules, and be forwarded to port2.After receiving Sync, DelayReq, DelayResp message, be forwarded to port2.Send the Announce message that 1588 protocol stack modules generate.
Port3, port4: abandon after receiving the Announce message, the normal DelayReq message that receives or other redundant 1588v2 message are transferred to 1588 protocol stack modules and are handled or abandon, and send Announce, Sync, DelayResp message that 1588 protocol stack modules generate.
5. all devices in the access ring all moves the BMC algorithm, and one of the port that can determine in the link is the slave port, other be the master port.All base station operation BMC algorithms, determining the port status that links to each other with access ring equipment is the slave port.Then the access ring device synchronization is in converging ring apparatus.Base station synchronization finally reaches the whole network time synchronized in access ring equipment.
Present embodiment is by providing a kind of new clock type: boundary clock+transparent clock.And a new port type proposed: the server port.On the master port type basis of this port type in the PTP standard, increase some characteristics newly, for example, the server port has 1588v2 message termination that all are received (can not transparent transmission, prevent that subordinate's 1588 messages from traversing in the higher level 1588v2 network) function, for the Announce packet loss of receiving, prevent that the BMC algoritic module is calculated to be the slave port with this port; Transferring to 1588 protocol stack modules for the normal DelayReq message of receiving or other redundant 1588v2 message handles or abandons.The message (comprising Announce, Sync, Flow_Up or DelayResp) that sends for 1588 protocol stack modules does not filter.The function of the existing boundary clock of boundary clock+transparent clock has the function of transparent clock again.This clock type can have a slave port, a plurality of master ports.A plurality of master ports can specify wherein certain or certain several are transparent transmission ports, and also can specify wherein certain or certain severally be the server port.
For example:, and need provide clock time to access ring equipment if this network element is for converging ring apparatus.Then can finger prosthesis deciding corresponding ports is the server port, when this port participates in the computing of BMC algorithm, is fixed as the master port.Only send the Announce message, do not receive the Announce message from this port.And this port is other ports of transparent transmission PTP message of coming not.Can select the state of each PTP port through this nodal clock of operation of BMC algorithm.Such as having a slave+ transparent transmission port, have one or more server port, have one or more transparent transmission port.
Telecom operators converge the form that ring is hung a plurality of access rings down if be deployed to one when disposing the 1588v2 Time Synchronization Network, then can use the clock type that the embodiment of the invention provides.The application of the type can improve the time synchronized performance of the nodal clock that converges on the ring.Can block simultaneously and converge interfering with each other of ring and access ring equipment for access ring equipment provides the time; And this mode has been simplified the complexity of 1588v2 time synchronization network, and the simplicity and the fail safe that improve the management of 1588v2 time synchronization network.Simultaneously the clock type that provides of the embodiment of the invention can interconnect with four kinds of fundamental clock types proposing in the standard.
Referring to Fig. 4, the embodiment of the invention also provides a kind of ring apparatus that converges, and this equipment comprises:
Port type determination module 42 is used for definite port type when front port;
Wherein, converge the function that ring apparatus disposes boundary clock and transparent clock; This port type comprises master port, from port and serve port, serve port is the port that links to each other with access ring;
Message processing module (MPM) 44, the port types that are used for determining according to port type determination module 42 are handled Precision Time Protocol PTP message, make that equipment room reaches synchronous in the convergence type network that converges the ring apparatus place.
Message processing module (MPM) 44 comprises: packet sending unit is used for determining when the type of front port is serve port, from send the PTP message that generates when front port; The message termination unit is used for determining abandoning the PTP message that receives when front port when the type of front port is serve port.
It is one of following that PTP message in the present embodiment comprises: announcement (Announce) message, (Sync) message, stream report (flow_up) message, time-delay request (DelayReq) message and time-delay response (DelayResp) message synchronously.
Message processing module (MPM) 44 is as follows to the processing of PTP message according to the type of port:
From port (Slave port), need be transparent to other master port (being the master port) for Sync message of receiving and flow_up message, and deliver to 1588 protocol stack modules simultaneously.Only doing transparent transmission for the DelayReq message of receiving handles.For the DelayResp message of receiving, need by purpose clock sign (ClockID) termination and on send the processing of 1588 protocol stack modules; Only doing transparent transmission for the unmatched DelayResp message of purpose ClockID handles.1588 messages that send for 1588 protocol stack modules normally send.
Serve port (Server port), all 1588v2 messages of receiving terminate on this port (can not transparent transmission, prevent that subordinate's 1588 messages from traversing in the higher level 1588v2 network), must abandon for the Announce message of receiving, prevent that the BMC algoritic module is calculated to be the Slave port with this port; Transferring to 1588 protocol stack modules for the normal DelayReq message of receiving or other redundant 1588v2 message handles or abandons.Do not do to filter (comprising Announce, Sync, Flow_Up, DelayResp) for the message that 1588 protocol stack modules send.
Master port (Master port), for the Announce message of receiving need transparent transmission and on send 1588 protocol stack modules, participate in the computing of BMC algorithm.Only need do transparent transmission for the Sync that receives, Flow_Up, DelayReq, DelayResp message handles.The Announce message that sends for platform need normally send.Though it is the Master port that the BMC algoritic module calculates this port, this port does not send the Sync message.
Preferably, converge ring apparatus and comprise: the algorithm configuration module, the clock PTP port status selection algorithm that is used to dispose self is a best master clock BMC algorithm; Port type is selected module, is used to move the BMC algorithm of algorithm configuration block configuration, and selecting a port from the port of self is from port, and at least one port is a master port, and at least one port of selection is a serve port from master port.
Foregoing description is to converge ring apparatus with this to be connected with access ring be the explanation that example is carried out, and when the compiling ring apparatus and do not connect access ring of present embodiment, its clock type is a boundary clock.Wherein, this time source that converges ring apparatus that does not connect access ring is from global position system GPS, and as the GM clock of convergence type network.
The clock type that compiles the ring apparatus configuration of present embodiment is boundary clock+transparent clock, therefore it can carry out different processing to the PTP message according to the type of port, reach the purpose that the time is provided to access ring, solve the relatively poor problem of synchronism of equipment room in the convergence type network, strengthened the robustness of network time synchronization.And access ring equipment will can not influence the time synchronized that converges ring apparatus by above-mentioned configuration, makes the time synchronized of equipment room in the convergence type network reach the layering processing, promptly can only is provided to access ring equipment the time by converging ring apparatus.Simplify the simultaneous operation of equipment room in the convergence type network, improved systematic function.
Referring to Fig. 5, the embodiment of the invention also provides a kind of convergence type network system, and this system comprises: converge ring apparatus 50 and access ring equipment 60;
Converging ring apparatus 50 comprises:
Port type determination module 52 is used for definite port type when front port; Wherein, converge the function that ring apparatus 50 disposes boundary clock and transparent clock; Port type comprises master port, from port and serve port, serve port is the port that links to each other with access ring;
Message processing module (MPM) 54, the port type that is used for determining according to the port type determination module is handled Precision Time Protocol PTP message, makes that equipment room reaches synchronous in the convergence type network system;
Access ring equipment 60 comprises:
Synchronization module 62 is used for handling the PTP message according to the port type of its port, and the clock type of access ring equipment 60 is boundary clock or transparent clock, and the port type of access ring equipment comprises master port and from port.
It is specifically same as the previously described embodiments to the processing of PTP message to converge ring apparatus 50, for example: when converging ring apparatus when determining that port type is serve port, send the PTP message that generates from this port, abandon the PTP message that this port receives.Based on this, message processing module (MPM) 54 comprises:
Packet sending unit is used for determining when the type of front port is serve port, from send the PTP message that generates when front port;
The message termination unit is used for determining abandoning the PTP message that receives when front port when the type of front port is serve port.
Wherein, the PTP message comprises one of following: announcement (Announce) message, (Sync) message, stream report (flow_up) message, time-delay request (DelayReq) message and time-delay response (DelayResp) message synchronously.
Preferably, this system also comprises: the transmission deviation TD base station that links to each other with access ring equipment, this TD base station configuration has the ordinary clock function, is used for carrying out synchronously with access ring equipment 60.
Preferably, converge ring apparatus 50 and comprise: the first algorithm configuration module, the clock PTP port status selection algorithm that is used to dispose self is a best master clock BMC algorithm; Port type is selected module, is used to move the BMC algorithm of algorithm configuration block configuration, and selecting a port from the port of self is from port, and at least one port is a master port, and at least one port of selection is a serve port from master port.
Converge ring apparatus 50 accordingly with above-mentioned, access ring equipment 60 comprises: the second algorithm configuration module, and the clock PTP port status selection algorithm that is used to dispose self is a best master clock BMC algorithm; Second port type is selected module, is used to move the BMC algorithm of algorithm configuration block configuration, and selecting a port from the port of self is from port, and all the other ports are master port.
Foregoing description is to converge ring apparatus 50 with this to be connected with access ring be the explanation that example is carried out, and for the ring apparatus that compiles that does not connect access ring, its clock type configuration is a boundary clock.Wherein, this time source that converges ring apparatus that does not connect access ring is from global position system GPS, and as the GM clock of convergence type network.
The clock type that compiles the ring apparatus configuration of present embodiment is boundary clock+transparent clock, therefore it can carry out different processing to the PTP message according to the type of port, reach the purpose that the time is provided to access ring, solve the relatively poor problem of synchronism of equipment room in the convergence type network, strengthened the robustness of network time synchronization.And access ring equipment will can not influence the time synchronized that converges ring apparatus by above-mentioned configuration, makes the time synchronized of equipment room in the convergence type network reach the layering processing, promptly can only is provided to access ring equipment the time by converging ring apparatus.Simplify the simultaneous operation of equipment room in the convergence type network, improved systematic function.
As can be seen from the above description, the present invention has realized following technique effect: improve the time synchronized performance that converges the nodal clock on the ring.Can block simultaneously and converge interfering with each other of ring and access ring equipment for access ring equipment provides the time.Simplify the complexity of 1588v2 time synchronization network, and the simplicity and the fail safe that improve the management of 1588v2 time synchronization network.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. the method for synchronous of equipment room in the convergence type network is characterized in that, comprising:
Converge ring apparatus and determine to work as the port type of front port;
Wherein, describedly converge the function that ring apparatus disposes boundary clock and transparent clock; Described port type comprises master port, from port and serve port, described serve port is the port that links to each other with access ring;
The described ring apparatus that converges is handled Precision Time Protocol PTP message according to the described port type of determining, makes that equipment room reaches synchronous in the described convergence type network.
2. method according to claim 1 is characterized in that, when the described ring apparatus that converges when determining that described port type is described serve port,
The described ring apparatus that converges comprises according to the described port type processing Precision Time Protocol PTP message of determining: from the described PTP message that generates when the front port transmission, abandon the described PTP message that receives when front port.
3. method according to claim 1 is characterized in that, determines that at the described ring apparatus that converges described method also comprises before the port type of front port:
The clock type that disposes the access ring equipment on the described access ring is boundary clock or transparent clock, and wherein, described transparent clock is point-tor point P 2 P transparent clock or end-to-end E2E transparent clock;
The clock type that disposes the transmission deviation TD base station that hangs under the described access ring equipment is an ordinary clock.
4. method according to claim 3, it is characterized in that, the described ring apparatus that converges is according to after the described port type processing PTP message of determining, described method also comprises: described access ring equipment is handled the PTP message according to the port type of its port, and the port type of described access ring equipment comprises master port and from port.
5. according to each described method of claim 1-4, it is characterized in that, determine that at the described ring apparatus that converges described method also comprises before the port type of front port:
Disposing the clock type that converges ring apparatus that does not connect access ring in the described convergence type network is boundary clock.
6. method according to claim 5 is characterized in that, the described time source that converges ring apparatus that does not connect access ring is from global position system GPS, and as the grandfather GM clock of described convergence type network.
7. according to each described method of claim 1-4, it is characterized in that it is one of following that described PTP message comprises: announcement Announce message, Sync message, stream report flow_up message, time-delay request DelayReq message and time-delay response DelayResp message synchronously.
8. according to each described method of claim 1-4, it is characterized in that the described ring apparatus that converges determines that described method also comprises before the port type of front port:
The clock PTP port status selection algorithm that disposes the equipment in the described convergence type network is a best master clock BMC algorithm;
The described ring apparatus that converges moves described BMC algorithm, selects a port for from port from the described port that converges ring apparatus, and at least one port is a master port, and to select at least one port from described master port be serve port; The described BMC algorithm of access ring equipment operation on the described access ring, selecting a port from the port of described access ring equipment is from port, all the other ports are master port.
9. one kind is converged ring apparatus, it is characterized in that, comprising:
The port type determination module is used for definite port type when front port;
Wherein, describedly converge the function that ring apparatus disposes boundary clock and transparent clock; Described port type comprises master port, from port and serve port, described serve port is the port that links to each other with access ring;
Message processing module (MPM) is used for handling Precision Time Protocol PTP message according to the described port type that described port type determination module is determined, makes that equipment room reaches synchronous in the described convergence type network that converges the ring apparatus place.
10. the ring apparatus that converges according to claim 9 is characterized in that described message processing module (MPM) comprises:
Packet sending unit is when being used for determining that described type when front port is described serve port, from the described PTP message that generates that sends when front port;
The message termination unit when being used for determining that described type when front port is described serve port, abandons the described PTP message that receives when front port.
11., it is characterized in that the described ring apparatus that converges comprises according to claim 9 or the 10 described ring apparatus that converge:
The algorithm configuration module, the clock PTP port status selection algorithm that is used to dispose self is a best master clock BMC algorithm;
Port type is selected module, is used to move the described BMC algorithm of described algorithm configuration block configuration, and selecting a port from the port of self is from port, and at least one port is a master port, and at least one port of selection is a serve port from described master port.
12. a convergence type network system is characterized in that, comprising: converge ring apparatus and access ring equipment;
The described ring apparatus that converges comprises:
The port type determination module is used for definite port type when front port; Wherein, describedly converge the function that ring apparatus disposes boundary clock and transparent clock; Described port type comprises master port, from port and serve port, described serve port is the port that links to each other with access ring;
Message processing module (MPM) is used for handling Precision Time Protocol PTP message according to the described port type that described port type determination module is determined, makes that equipment room reaches synchronous in the described convergence type network system;
Described access ring equipment comprises:
Synchronization module is used for handling the PTP message according to the port type of its port, and the clock type of described access ring equipment is boundary clock or transparent clock, and the port type of described access ring equipment comprises master port and from port.
13. system according to claim 12 is characterized in that, described message processing module (MPM) comprises:
Packet sending unit is when being used for determining that described type when front port is described serve port, from the described PTP message that generates that sends when front port;
The message termination unit when being used for determining that described type when front port is described serve port, abandons the described PTP message that receives when front port.
14. system according to claim 12 is characterized in that, described system also comprises: the transmission deviation TD base station that links to each other with described access ring equipment, described TD base station configuration has the ordinary clock function, is used for carrying out synchronously with described access ring equipment.
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| CN 201010286305 CN101938318B (en) | 2010-09-15 | 2010-09-15 | Synchronous method, system and convergent ring device among devices in convergent network |
| PCT/CN2010/079519 WO2012034330A1 (en) | 2010-09-15 | 2010-12-07 | Method, system and convergence loop apparatus for synchronization between apparatuses in convergence network |
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| WO2012034330A1 (en) | 2012-03-22 |
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