CN102045322A - Network system and method for information synchronization in same - Google Patents
Network system and method for information synchronization in same Download PDFInfo
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- CN102045322A CN102045322A CN2009102090196A CN200910209019A CN102045322A CN 102045322 A CN102045322 A CN 102045322A CN 2009102090196 A CN2009102090196 A CN 2009102090196A CN 200910209019 A CN200910209019 A CN 200910209019A CN 102045322 A CN102045322 A CN 102045322A
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Abstract
The invention discloses a network system and a method for information synchronization in the same. In the network system, a plurality of synchronous information flows are loaded in corresponding synchronous logical ports in one physical port in access equipment, and the synchronous information flows are distributed to network units corresponding to the synchronous logic ports. Each physical port corresponds to one or a plurality of synchronous fields, and each synchronous field comprises at least one synchronous logic port and one or a plurality of network units; the physical port finds the corresponding logic port identifiers and adds the corresponding logic port identifiers to the synchronous messages issued to the network units according to the synchronous fields to which the synchronous information flows belong. The network units judge whether the network units belong to the synchronous fields according to the logic port identifiers in the synchronous messages; and if yes, the network units carry out synchronization according to the synchronous messages. The method provided by invention is suitable for the point-to-point or point-to-multipoint physical ports; and by utilizing the method, the synchronization service of a plurality of time/frequency information flows can be provided, and the network utilization efficiency is improved.
Description
Technical field
The present invention relates to the communication network technology field, relate in particular to the method for carrying out information synchronization in a kind of network system and this network system.
Background technology
At present, standard WT145 (multi-service broadband network functional module and framework) is discussing in broadband forum (BBF, Broadband Forum), and this standard is not finished as yet, is carrying out draft 08 version (referring to BBF DSL2008.221.08.doc) at present.In the chapters and sections 5.1 of the WT145 of described 08 version draft, the processing capacity of time/Frequency Synchronization in the future network framework is divided into the submodule that two functions cooperatively interact has carried out simple description, these two submodules are as follows:
Synchronizing function submodule (Synch submodule): be used for being responsible for obtaining a high-quality time/frequency synchronization information, and this high precision time/frequency synchronization information is distributed to the network terminal, for example a base station from the Network Synchronization source;
IWF submodule (IWF submodule): be used to provide the function that interconnects between the level, be mainly used to provide the business of the time division multiplexing (Time Division Multiplexing is called for short TDM) based on the packet network framework.This IWF sub-function module also needs to be provided at the translation function between dissimilar time/frequency synchronization methods in addition.
In the chapters and sections 5.5.1 of the WT145 of 08 version draft, specifically defined the instantiation of synchronizing function submodule again, described instantiation comprises: synchronous ethernet type, DSL (Digital Subscriber Line, Digital Subscriber Line) wheel synchronization type, GPON (gigabit passive optical network) wheel synchronization type, E1 wheel synchronization type, T1 wheel synchronization type; And require the IWF submodule to be provided at the ability that interconnects between the instantiation of the above-mentioned type.
In above-described instantiation type, the GPON wheel synchronization type is different from other several wheel synchronization type.This is because EPON (Passive Optical Network, be called for short PON) be the network configuration of natural point to multiple spot, thereby exist so a kind of practical situations, for example in network configuration shown in Figure 1, the PON network is the basic network that the C of operator provides, and rents the PON local side apparatus and be used for moving carrying passback use for the A of operator to the circuit of optical network unit ONU 1; Renting the PON local side apparatus is used for mobile base station passback use for the B of operator to the circuit of optical network unit ONU 2; The PON local side apparatus is that the C of operator gives over to personal equipment to the circuit of optical network unit ONU 3 and ONU 4.3 times and frequency synchronization information stream will be arranged so simultaneously through same physics PON interface in the PON local side apparatus.
According to the defined method of present standard WT145, can only provide the interconnect function of operator between synchronous protocol that uses before the PON local side apparatus and PON synchronous protocol in the example of lifting.And the function of a plurality of time-domains through many synchronizing of information stream of carrying on the same PON physical interface can't be provided.Operator can be restricted when hiring out network like this, can't provide many time/the synchronous business of frequency information stream.
In fact this problem not only occurs in the PON physical interface, at all point-to-points or put provide if desired in the physical interface of multiple spot multiple domain time/frequency synchronization information stream, all exist similar problem to need to solve.
Thereby, in communications network system, in the same physical interface of network system, how to realize multiple domain time/frequency synchronization information stream becomes synchronously needs the problem that solves.
Summary of the invention
Technical problem to be solved by this invention is, the method for carrying out information synchronization in a kind of network system and this network system is provided, and solves and realizes the synchronous problem of multiple domain synchronizing of information stream in the network system in the same physical interface.
In order to address the above problem, the present invention proposes a kind of information synchronization method of multiple domain, comprising:
A plurality of synchronizing of information stream are carried in the synchronous logic port corresponding in the physical port of access device, and described synchronizing of information stream are distributed in the network element of described synchronous logic port correspondence.
The corresponding one or more synchronization fields of each described physical port, each described synchronization field comprises at least one synchronous logic port and one or more described network element.
Described synchronous logic port has logical port identifier, described physical port is after receiving described a plurality of synchronizing of information stream, according to the synchronization field under the synchronizing of information stream, find its logical port identifier, and, described synchronization message is issued to network element with this logical port identifier adding synchronization message.
Described method further comprises:
When described network element receives described synchronization message, judge according to the logical port identifier in the synchronization message whether oneself belongs to this synchronization field, if then carry out information synchronization according to synchronization message.
Described physical port adopts broadcast mode to issue to the all-network unit when network element issues described synchronization message; Perhaps only the all-network unit in corresponding synchronization field with logical port identifier sends described synchronization message of carrying logical port identifier.
The present invention also provides a kind of network system, and described network system comprises: some network element, at least one physical port, each described physical port have corresponding one or more synchronous logic ports, wherein:
Described synchronous logic port is used to carry the network element that arrives a plurality of synchronizing of information stream on the physical port and described synchronizing of information stream is distributed to described synchronous logic port correspondence.
Wherein, the corresponding one or more synchronization fields of each described physical port, each described synchronization field comprises: at least one synchronous logic port and one or more described network element.
Wherein, described synchronous logic port has logical port identifier, described physical port is after receiving described a plurality of synchronizing of information stream, when described synchronizing of information stream being distributed to corresponding network element by described synchronous logic port, according to the synchronization field under the synchronizing of information stream, find its logical port identifier, and this logical port identifier is added synchronization message, described synchronization message is issued to network element.
Wherein, described network element when being used to receive described synchronization message, judges according to the logical port identifier in the synchronization message whether oneself belongs to this synchronization field, if then carry out information synchronization according to synchronization message.
Wherein, described physical port after receiving described a plurality of synchronizing of information stream, when by described synchronous logic port described synchronizing of information stream being distributed to corresponding network element, adopts broadcast mode to issue to the all-network unit; Perhaps only the all-network unit in corresponding synchronization field with logical port identifier sends described synchronization message of carrying logical port identifier.
Carry out the method for information synchronization in network system of the present invention and this network system, at access network, in same physical interface, provide multiple domain time/synchronization mechanism of frequency synchronization information stream, be applicable to point-to-point or put the physical interface of multiple spot, operator is when hiring out network, can provide many time/the synchronous business of frequency information stream, satisfy the simultaneous techniques demand when renting network, improved network utilisation efficient.
Description of drawings
Fig. 1 is a kind of network diagram that has multiple domain time/Frequency Synchronization demand;
Fig. 2 is the network system schematic diagram of realization multiple domain information synchronization of the present invention;
Fig. 3 is a schematic diagram of realizing the multiple domain information synchronization among the present invention in the PON network.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
At point-to-point or put in the network system of multiple spot, same physical interface need provide multiple domain time/requirement of frequency synchronization information stream.The present invention proposes a kind of technical scheme of on same access physical interface, carrying out information synchronization, core concept is: a plurality of synchronizing of information stream are carried in the synchronous logic port corresponding in the physical port of access device, and described synchronizing of information stream are distributed in the network element of described synchronous logic port correspondence.
As shown in Figure 2, shown a kind of network system, this network system is typical Access Network, and described network system comprises:
Some network element, at least 1 physical port, each physical port correspondence is connected with 2 or a plurality of synchronization field, and for example synchronization field 1～3.Each synchronization field comprise again time/frequency synchronization information stream, a synchronous logic port, one or more network element, for example:
Synchronization field 1 by time/frequency synchronization information stream 1, the synchronous logic port one, network element 1 is formed;
Synchronization field 2 by time/frequency synchronization information stream 2, synchronous logic port 2, network element 3 and 4 is formed;
Synchronization field 3 by time/frequency synchronization information stream 3, synchronous logic port 3, network element 2 is formed.
Described synchronous logic port one～3 all are positioned on the physical interface of same Access Network, promptly mark off some synchronous logic ports on same physical interface, and each synchronous logic port assignment has a logical port identifier.
Described physical port according to the synchronization field under the synchronizing of information stream, finds the logical port identifier of the correspondence of this synchronizing of information stream after receiving the synchronizing of information stream on upper strata, and this logical port identifier is added the time synchronized message that is issued to network element.
When described network element receives the time synchronized message that issues, judge according to logical port identifier wherein whether oneself belongs to this synchronization field, if then carry out time synchronized according to time synchronized message.If not, then do not carry out synchronously.
When described time synchronized message issues, can adopt broadcast mode to issue, the all-network unit all can receive; Also only issue in the synchronization field, for example adopt clean culture or multicast mode, only the network element in this synchronization field just can receive, and carries out synchronously.Described time synchronized message can be PLOAM message among the GPON, also can be OMCI message, can also be the Ethernet OAM message in the EPON network.
Based on above-mentioned network system, method of carrying out information synchronization of the present invention comprises the steps:
First step: on a physical interface of access network, mark off one or more synchronous logic ports, for each synchronous logic port is provided with a logical port identifier, and with synchronizing of information stream and corresponding synchronous logic port and corresponding network element composition synchronization field; During division, can divide, the how many kinds of clock information is arranged on the PON interface, just draw how many territories according to the synchronizing of information stream kind.
Second step: described physical port according to the synchronization field under the synchronizing of information stream, finds its logical port identifier, and this logical port identifier is added the time synchronized message that is issued to network element after time of reception/frequency synchronization information stream;
Third step: when described network element receives the time synchronized message that issues, judge according to logical port identifier wherein whether oneself belongs to this synchronization field, if then carry out time synchronized according to time synchronized message; If not, then do not carry out synchronously.
In described second step, when issuing described time synchronized message, can adopt broadcast mode to issue, then the all-network unit all can receive; Also can only issue in synchronization field, for example adopt clean culture or multicast mode, only the network element in this synchronization field just can receive, and carries out synchronously.Described time synchronized message can be (the Physical Layer OAM of PLOAM among the GPON, physical layer maintenance management cell) message, also can be management and control interface (OMCI) message, can also be ethernet operation management maintenance (OAM) message in the EPON network.
Embodiment 1: with the passive optical network PON is example, illustrates that the multiple domain in the PON network is synchronous.
As shown in Figure 3, shown PON network architecture schematic diagram.
Background: the C of infrastructure of telecommunication provider, built the PON network, and provide service for its optical network unit ONU 3 and ONU4.Simultaneously, the C of operator also rents the A of operator with optical network unit ONU 1 and carries out passing time information, and cooperates its service bearer; Optical network unit ONU 4 is rented the B of operator carry out passing time information, and cooperate its service bearer.
Step 101: the C of operator is divided into more than one a plurality of synchronous logic port with a physical port of PON network, synchronizing of information stream corresponding to a plurality of territories, the physical port of PON is divided into 3 synchronous logic ports, for each logic port is provided with a logical port identifier, distinguish by logical port identifier, and synchronizing of information stream and corresponding synchronous logic port and corresponding ONU are formed the synchronizing information territory.Wherein:
Synchronous logic port one and the synchronizing of information stream that derives from the A of operator have constituted the operator A synchronizing information territory of a logic, and logical port identifier is ToD-ID=1;
Synchronous logic port 3 and the synchronizing of information stream that derives from the B of operator have constituted the operator B synchronizing information territory of a logic, and logical port identifier is ToD-ID=3;
Synchronous logic port 2 and the synchronizing of information stream that derives from the C of operator have constituted the synchronizing information territory of the logic of the C of operator itself, and logical port identifier is ToD-ID=2;
The formation in described synchronous logic territory 1,2,3 as shown in Figure 3, its physics joint is at the physical port place of PON.Wherein:
Synchronous logic territory 1 comprises the synchronizing of information stream that derives from the A of operator, synchronous logic port one, network element 1;
Synchronous logic territory 2 comprises the synchronizing of information stream that derives from the C of operator, synchronous logic port 2, network element 3 and 4;
Synchronous logic territory 3 comprises the synchronizing of information stream that derives from the B of operator, synchronous logic port 3, network element 2.
Step 102:PON physical port from first line of a couplet port receive from some A of operator time/frequency information stream after, according to the logical synchronization territory under the synchronizing of information stream, find its logical port identifier, confirm its logical port identifier ToD-ID=1, and in the time synchronization information that broadcast mode issues, add logical port identifier information ToD-ID=1.The described time synchronized message that issues of stating can be PLOAM message among the GPON, also can be OMCI message, also can be the Ethernet OAM message in the EPON network.
Step 103: after the ONU in the Access Network received this synchronizing information of carrying logical port identifier, whether the pairing logical port identifier in logical synchronization territory equaled to receive the logical port identifier in the message under the detection itself.If equate, then carry out the conversion of time synchronized.If etc., then do not ignore this message.
Embodiment 2: with the passive optical network PON is example, and the synchronous another kind of execution mode of multiple domain in the PON network is described.
Background: the C of infrastructure of telecommunication provider, built the PON network, and provide service for its optical network unit ONU 3 and ONU4.Simultaneously, the C of operator also rents the A of operator with optical network unit ONU 1 and carries out passing time information, and cooperates its service bearer; Optical network unit ONU 4 is rented the B of operator carry out passing time information, and cooperate its service bearer.
Step 201: the C of operator is divided into more than one a plurality of synchronous logic port with a physical port of PON network, synchronizing of information stream corresponding to a plurality of territories, the physical port of PON is divided into 3 synchronous logic ports, for each logic port is provided with a logical port identifier, distinguish by logical port identifier, and synchronizing of information stream and corresponding synchronous logic port and corresponding ONU are formed the synchronizing information territory.Wherein:
Synchronous logic port one and the synchronizing of information stream that derives from the A of operator have constituted the operator A synchronizing information territory of a logic, and logical port identifier is ToD-ID=1;
Synchronous logic port 3 and the synchronizing of information stream that derives from the B of operator have constituted the operator B synchronizing information territory of a logic, and logical port identifier is ToD-ID=3;
Synchronous logic port 2 and the synchronizing of information stream that derives from the C of operator have constituted the synchronizing information territory of the logic of the C of operator itself, and logical port identifier is ToD-ID=2;
The formation in described synchronous logic territory 1,2,3 as shown in Figure 3, its physics joint is at the physical port place of PON.Wherein:
Synchronous logic territory 1 comprises the synchronizing of information stream that derives from the A of operator, synchronous logic port one, network element 1;
Synchronous logic territory 2 comprises the synchronizing of information stream that derives from the C of operator, synchronous logic port 2, network element 3 and 4;
Synchronous logic territory 3 comprises the synchronizing of information stream that derives from the B of operator, synchronous logic port 3, network element 2.
Step 202:PON physical port from first line of a couplet port receive from some A of operator time/frequency synchronization information stream after, according to the logical synchronization territory under the synchronizing of information stream, find its logical port identifier, confirm its logical port identifier ToD-ID=1, find that logical port identifier is the ONU user of ToD-ID=1 among all ONU that connect under this PON ports physical, and the ONU user who is ToD-ID=1 to this partial logic port identifiers issues time synchronization information, adds logical port identifier information ToD-ID=1 simultaneously in time synchronized message.
The described time synchronized message that issues can be PLOAM message among the GPON, also can be OMCI message, also can be the Ethernet OAM message in the EPON network.
Step 203: in the Access Network, the part of O NU user who only belongs to logical port identifier ToD-ID=1 receives this synchronizing information, and is accepting the synchronous conversion of the laggard line time of message.
For the method and system that carries out the multiple domain information synchronization of the present invention, can also be applicable to the DSL network, realize that the multiple domain in the DSL network is synchronous, when specifically implementing, can realize with reference to the mode of the foregoing description 1, embodiment 2 and in conjunction with the DSL network characteristics.
Method of carrying out the multiple domain information synchronization of the present invention, at access network, in same physical interface, provide multiple domain time/synchronization mechanism of frequency synchronization information stream, be applicable to point-to-point or put the physical interface of multiple spot, operator is when hiring out network, can provide many time/the synchronous business of frequency information stream, satisfy the simultaneous techniques demand when renting network, improved network utilisation efficient.
The above is embodiments of the 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 the claim scope of the present invention.
Claims (10)
1. the information synchronization method of a multiple domain is characterized in that, comprising:
A plurality of synchronizing of information stream are carried in the synchronous logic port corresponding in the physical port of access device, and described synchronizing of information stream are distributed in the network element of described synchronous logic port correspondence.
2. information synchronization method as claimed in claim 1 is characterized in that, the corresponding one or more synchronization fields of each described physical port, and each described synchronization field comprises at least one synchronous logic port and one or more described network element.
3. information synchronization method as claimed in claim 2 is characterized in that, in the described method:
Described synchronous logic port has logical port identifier, described physical port is after receiving described a plurality of synchronizing of information stream, according to the synchronization field under the synchronizing of information stream, find its logical port identifier, and, described synchronization message is issued to network element with this logical port identifier adding synchronization message.
4. information synchronization method as claimed in claim 3 is characterized in that, described method further comprises:
When described network element receives described synchronization message, judge according to the logical port identifier in the synchronization message whether oneself belongs to this synchronization field, if then carry out information synchronization according to synchronization message.
5. as claim 3 or 4 described information synchronization methods, it is characterized in that,
Described physical port adopts broadcast mode to issue to the all-network unit when network element issues described synchronization message; Perhaps only the all-network unit in corresponding synchronization field with logical port identifier sends described synchronization message of carrying logical port identifier.
6. a network system is characterized in that, described network system comprises: some network element, at least one physical port, each described physical port have corresponding one or more synchronous logic ports, wherein:
Described synchronous logic port is used to carry the network element that arrives a plurality of synchronizing of information stream on the physical port and described synchronizing of information stream is distributed to described synchronous logic port correspondence.
7. network system as claimed in claim 6 is characterized in that, the corresponding one or more synchronization fields of each described physical port, and each described synchronization field comprises: at least one synchronous logic port and one or more described network element.
8. network system as claimed in claim 7 is characterized in that,
Described synchronous logic port has logical port identifier, described physical port is after receiving described a plurality of synchronizing of information stream, when described synchronizing of information stream being distributed to corresponding network element by described synchronous logic port, according to the synchronization field under the synchronizing of information stream, find its logical port identifier, and, described synchronization message is issued to network element with this logical port identifier adding synchronization message.
9. network system as claimed in claim 8 is characterized in that,
Described network element when being used to receive described synchronization message, judges according to the logical port identifier in the synchronization message whether oneself belongs to this synchronization field, if then carry out information synchronization according to synchronization message.
10. as claim 7 or 8 described network systems, it is characterized in that,
Described physical port after receiving described a plurality of synchronizing of information stream, when by described synchronous logic port described synchronizing of information stream being distributed to corresponding network element, adopts broadcast mode to issue to the all-network unit; Perhaps only the all-network unit in corresponding synchronization field with logical port identifier sends described synchronization message of carrying logical port identifier.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104184613A (en) * | 2014-08-01 | 2014-12-03 | 中国联合网络通信集团有限公司 | Method and apparatus for sharing passive optical network |
| CN105634714A (en) * | 2014-10-28 | 2016-06-01 | 中兴通讯股份有限公司 | Cross-domain clock synchronization method, device thereof and cross-domain clock synchronization system |
| CN107147463A (en) * | 2017-05-03 | 2017-09-08 | 烽火通信科技股份有限公司 | A kind of GPON carries the method and system of base station passed-back traffic |
| CN113993009A (en) * | 2020-07-27 | 2022-01-28 | 上海诺基亚贝尔股份有限公司 | Method and device for multi-domain transmission by time synchronization, OLT and ONU |
-
2009
- 2009-10-23 CN CN2009102090196A patent/CN102045322A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104184613A (en) * | 2014-08-01 | 2014-12-03 | 中国联合网络通信集团有限公司 | Method and apparatus for sharing passive optical network |
| CN104184613B (en) * | 2014-08-01 | 2018-09-21 | 中国联合网络通信集团有限公司 | A kind of method and apparatus of shared passive optical network |
| CN105634714A (en) * | 2014-10-28 | 2016-06-01 | 中兴通讯股份有限公司 | Cross-domain clock synchronization method, device thereof and cross-domain clock synchronization system |
| CN107147463A (en) * | 2017-05-03 | 2017-09-08 | 烽火通信科技股份有限公司 | A kind of GPON carries the method and system of base station passed-back traffic |
| CN113993009A (en) * | 2020-07-27 | 2022-01-28 | 上海诺基亚贝尔股份有限公司 | Method and device for multi-domain transmission by time synchronization, OLT and ONU |
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Application publication date: 20110504 |