CN103716247A - TDM-service transmission method and device - Google Patents
TDM-service transmission method and device Download PDFInfo
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- CN103716247A CN103716247A CN201210375201.0A CN201210375201A CN103716247A CN 103716247 A CN103716247 A CN 103716247A CN 201210375201 A CN201210375201 A CN 201210375201A CN 103716247 A CN103716247 A CN 103716247A
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Abstract
The invention provides a transmission method and device for TDM services and the method and the device are applied to a grouped-transmission network. The method includes: detecting and recording whether an alarm occurs at a TDM user side; if the alarm occurs to the TDM user side, filling a pseudo-wire message which is smaller than an original pseudo-wire message and complies with demands of network exchange with a pseudo-wire message and arranging an alarm mark in the pseudo-wire message; and sending the pseudo-wire message. The TDM-service transmission method and device are applied to a PTN device and under a condition that CES services become invalid at a UN1 side, only minimum-message information needed by the network is transmitted so that bandwidth resources at an NN1 side are saved greatly in a service scenario with a larger cascade number.
Description
Technical field
The present invention relates to network communication field, relate in particular to a kind of Packet Transport Network (PTN) transmission method and equipment, particularly a kind of TDM(time division multiplexing) transmission method and the device of business.
Background technology
Along with the propelling of ALL IP, the IPization of network is the trend that packetizing has become network technology evolution.Packet Transport Network (PTN, Packet Transport Network) arise at the historic moment, PTN supports the multiple two-way point-to-point interface channel based on packet switching service, have and be applicable to various large or fine granule business, networking capability end to end, " flexibility " transmission pipeline that is more suitable for IP operation characteristic is provided, solve the connectionless problem of traditional packet network, be convenient to carrier class application.PTN equipment provides the platform of a multiple service supporting, and traditional TDM business also needs to use PTN transmission over networks.PTN equipment is used circuit emulation service (CES) form to carry out TDM operation transmission, this business is also rigid conduit, feature be not in managed network the data of TDM business whether effective, opposite end is arrived by these transfer of data in capital, like this at User Network Interface (UNI, User Network Interface) in the situation that side business lost efficacy, still can take Network-to-Network Interface (NNI, Network Network Interface) bandwidth of side, caused certain waste, special the in the situation that of NNI side Bandwidth-Constrained, can greatly limit the use of PTN equipment.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of transmission method and device of TDM business, to solve prior art, also takies the defect of NNI side bandwidth in the situation that UNI side business lost efficacy.
For achieving the above object, one embodiment of the invention provide a kind of transmission method of TDM business, are applied to Packet Transport Network, and described method comprises:
Detect and record TDM user's side and whether occur alarm;
If there is alarm in TDM user's side, carry out encapsulation operation, obtain meeting the first pseudo wire PDU of switching network requirement, and in described the first pseudo wire PDU, alarm mark is set; The message of described the first pseudo wire PDU is less than the message size of the pseudo wire PDU obtaining based on data encapsulation to be sent;
Send described the first pseudo wire PDU.
Above-mentioned method, wherein:
The size of described the first pseudo wire PDU is to meet the minimum message size that switching network requires.
Above-mentioned method, wherein said alarm status is dropout state, LOF state and occurs one or more in alarm indication signal state.
Above-mentioned method, wherein, also comprises: if TDM user's side is normal condition, send after the payload data of TDM business is encapsulated into the second pseudo wire PDU.
Above-mentioned method, wherein, the frequency of encapsulation the first pseudo wire PDU is identical with the frequency of encapsulation the second pseudo wire PDU.
To achieve these goals, the embodiment of the present invention also provides a kind of transmission method of TDM business, is applied to Packet Transport Network, and described method comprises:
Receive the pseudo wire PDU that network side sends;
Detect and in described pseudo wire PDU, whether be provided with alarm mark, when described alarm is labeled as TDM user's side and occurs alarm, network side obtains in encapsulation obtains meeting the mark arranging in the first pseudo wire PDU that switching network requires, and the message of described the first pseudo wire PDU is less than the message size of the pseudo wire PDU obtaining based on data encapsulation to be sent;
If be provided with alarm mark in described pseudo wire PDU, with default byte of padding structure E1 frame.
Above-mentioned method, wherein, also comprises:
If alarm mark is not set in described pseudo wire PDU, with the payload data structure E1 frame of the TDM business encapsulating in described pseudo wire PDU.
To achieve these goals, the embodiment of the present invention also provides a kind of transmitting device of TDM business, is applied to Packet Transport Network, and described device comprises:
Detection module, for detection of and whether record TDM user's side be alarm status;
The first pseudo wire PDU package module, for when alarm appears in TDM user's side, carries out encapsulation operation, obtains meeting the first pseudo wire PDU of switching network requirement, and in described the first pseudo wire PDU, alarm mark is set; The message of described the first pseudo wire PDU is less than the message size of the pseudo wire PDU obtaining based on data encapsulation to be sent;
The first pseudo wire PDU sending module, for sending described the first pseudo wire PDU.
Above-mentioned device, wherein, the size of described the first pseudo wire PDU is to meet the minimum message size that switching network requires.
Above-mentioned device, wherein, also comprises:
The second pseudo wire PDU package module, for when TDM user's side is normal condition, is encapsulated as the second pseudo wire PDU by the payload data of TDM business.
Above-mentioned method, wherein, described first, second pseudo wire PDU package module is with identical frequency encapsulation.
To achieve these goals, the embodiment of the present invention also provides a kind of transmitting device of TDM business, is applied to Packet Transport Network, and described device comprises:
Pseudo wire PDU receiver module, for receiving pseudo wire PDU;
Detection module, for detection of whether being provided with alarm mark in described pseudo wire PDU, when described alarm is labeled as TDM user's side and occurs alarm, network side obtains in encapsulation obtains meeting the mark arranging in the first pseudo wire PDU that switching network requires, and the message of described the first pseudo wire PDU is less than the message size of the pseudo wire PDU obtaining based on data encapsulation to be sent;
The first pseudo wire PDU parsing module, for when described pseudo wire PDU is provided with alarm mark, with default byte of padding structure E1 frame.
Above-mentioned device, wherein, also comprises:
The second pseudo wire PDU parsing module, for when described pseudo wire PDU does not arrange alarm mark, with the payload data structure E1 frame of the TDM business encapsulating in described pseudo wire PDU.
Transmission method and the device of the TDM business that the embodiment of the present invention provides, be applied on PTN equipment, in CES business, in the situation that UNI side lost efficacy, the minimum message information that transmission network needs, can save the bandwidth of NNI side greatly for the larger business scenario of cascade number.
Accompanying drawing explanation
Fig. 1 is the flow chart of TDM business transmitting method one embodiment of the present invention;
Fig. 2 is the flow chart of another embodiment of TDM business transmitting method of the present invention;
Fig. 3 is the structural representation of TDM service transmission device one embodiment of the present invention;
Fig. 4 is the structural representation of another embodiment of TDM service transmission device of the present invention;
Fig. 5 is TDM artificial service PWE3 pseudo wire PDU encapsulation format;
Fig. 6 is destructuring Simulation Control word structure;
Fig. 7 is the schematic diagrames of two veneers in actual networking;
Fig. 8 is the business processing flow of pseudo wire PDU package module;
Fig. 9 is the business processing flow of pseudo wire PDU parsing module.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the accompanying drawings and the specific embodiments.
Embodiment mono-
One embodiment of the invention provide a kind of transmission method of TDM business, are applied to Packet Transport Network, and as shown in Figure 1, the method comprises:
Step S110: detect and record TDM user's side and whether occur alarm;
In this step, alarm status is dropout state, LOF state and occurs alarm indication signal state, as long as a kind of alarm status that is just considered as having occurred appears in above three kinds of states, sometimes may occur that wherein two kinds arrange three kinds simultaneously.
Step S120: if alarm appears in TDM user's side, now the invention process regular meeting changes assembly strategy, pseudo wire PDU is filled to the pseudo wire PDU that is less than former pseudo wire PDU and meets switching network requirement, and alarm mark is set in described pseudo wire PDU; That is to say, carry out the first encapsulation operation, obtain meeting the first pseudo wire PDU of switching network requirement, and in described the first pseudo wire PDU, alarm mark is set; The message of described the first pseudo wire PDU is less than the message size of the pseudo wire PDU obtaining based on data encapsulation to be sent;
In this step, if mentioned above any one or multiple alarm status detected, so just use byte of padding described pseudo wire PDU to be filled to the pseudo wire PDU that is less than former pseudo wire PDU (pseudo wire PDU obtaining based on original data encapsulation to be sent) and meets switching network requirement, the best can be filled to pseudo wire PDU the message that meets switching network requirement minimal size, and by the L bit set in pseudo wire PDU is arranged to alarm mark.Alarm mark is not limited to the set of L bit, the various ways that can also adopt those skilled in the art to be easy to expect, as increase an independent flag bit, or represent with undefined bit in pseudo wire PDU.
If TDM user's side is normal condition, the payload data of TDM business is encapsulated in the second pseudo wire PDU.TDM user's side encapsulates pseudo wire PDU frequency while there is alarm encapsulates the frequency of pseudo wire PDU when (not occurring alarm) in normal condition with TDM user's side can be identical.
Step S130: send pseudo wire PDU.
In the present embodiment, when TDM user's side occur dropout state, LOF state or alarm indication signal any one time, network side no longer sends normal pseudo wire PDU, but use byte of padding to be filled to the pseudo wire PDU that is less than former pseudo wire PDU and meets network requirement, thereby reduced taking of network side broadband.
Embodiment bis-
One embodiment of the invention also provide a kind of transmission method of TDM business, are applied to Packet Transport Network, and as shown in Figure 2, the method comprises:
Step S210: the pseudo wire PDU that receives network side;
Step S220: detect whether be provided with alarm mark in described pseudo wire PDU, when described alarm is labeled as TDM user's side and occurs alarm, network side obtains in encapsulation obtains meeting the mark arranging in the first pseudo wire PDU that switching network requires, and the message of described the first pseudo wire PDU is less than the message size of the pseudo wire PDU obtaining based on data encapsulation to be sent;
In this step, alarm mark can be the set of L bit, and the L bit set in pseudo wire PDU being detected, is provided with alarm mark in pseudo wire PDU.
Step S230: if be provided with alarm mark in described pseudo wire PDU, with default byte of padding structure E1 frame.
If be not provided with alarm mark in described pseudo wire PDU, namely under normal condition, with the payload data structure E1 frame of the TDM business encapsulating in described pseudo wire PDU.
In the present embodiment, receive after the pseudo wire PDU that network side sends, first to detect and whether be provided with alarm mark in this pseudo wire PDU, if there is alarm mark, exactly at the pseudo wire PDU that occurs sending under alarm, pseudo wire PDU so is now to fill with byte of padding the pseudo wire PDU that former pseudo wire PDU meets network requirement that is less than building, with default byte of padding structure E1 frame, because the pseudo wire PDU building is than little many of normal pseudo wire PDU, thereby saved bandwidth.
Below in conjunction with above-mentioned two embodiment, with reference to Fig. 5, Fig. 6, Fig. 8 and Fig. 9, by further preferred embodiment, describe the transmission method of TDM business of the present invention in detail.As shown in Figure 5, be TDM artificial service PWE3(Pseudo Wire Emulation Edge-to-Edge, PseudoWire Emulation Edge to Edge) pseudo wire PDU comprises MPLS label stack, and control word and clean core, can be at control word and clean internuclear insertion RTP head.Be illustrated in figure 6 a kind of implementation of destructuring Simulation Control word structure.
As shown in Figure 8, after receiving tdm data, according to the alarm status of E1 interface, adopt different assembly strategies.Judge whether TDM interface has alarm, if without any alarm, according to user configured cascade, count N, N E1 frame is encapsulated in pseudo wire PDU; If there is LOS(dropout, Lost Of Signal)/LOF(LOF, Lost Of Frame)/AIS(alarm indication signal, Alarm Indication Signal) any in, use to fill message (for example complete 1) pseudo wire PDU is filled to 64 bytes (being that N E1 frame constructed an important pseudo wire PDU equally), simultaneously by the L bit set in message.Send message to master control, master control sends on PSN network by NNI veneer.
Again as shown in Figure 9, receiving pseudo wire PDU resolves afterwards.First judge the whether set of L bit.If the set of L bit shows to occur alarm, the size of verification pseudo wire PDU whether with expection consistent (64 byte), when inconsistent, think Abnormal Packet and abandon this message, when consistent, TDM frame processing module is used default filling message (for example complete 1) structure E1 frame.If L bit is declined bit table contract quotation, literary composition is normal, uses the payload structure E1 frame of pseudo wire PDU.
In the present embodiment, using filling message that pseudo wire PDU is filled to 64 bytes is most preferred embodiments, in actual applications, can be according to the actual requirements and operating environment condition, pseudo wire PDU is filled to required byte-sized, is only less than former pseudo wire PDU size, reach the object that the present invention saves bandwidth, the technical scheme that those skilled in the art reach on this basis, all should be included in the present invention and comprise in scope.
From the pseudo wire PDU form of RFC4553 and RFC5086 definition, can find out, when there is alarm in UNI side, in message, fill whole are TDM frames of invalid complete 1.After using method of the present invention, only need to use the minimum message of this packet network can replace the transmission of invalid data frame.Suppose N E1 frame of a pseudo wire PDU encapsulation, comprise two-layer MPLS label and one deck VLAN, packet switching network is Ethernet, and the size of message is M1=32*N+26 so.After use the present invention, the in the situation that of UNI side fault, message is fixed size M2=64, M2/M1=64/ (32*N+26).In engineering application, typical N value is 8, uses the bandwidth taking when UNI lost efficacy after method of the present invention to only have 64/ (32*8+26)=22.7% of traditional approach.Thereby cascade number is larger, the bandwidth of saving when UNI side breaks down by the present invention is more.
Embodiment tri-
One embodiment of the invention also provide a kind of transmitting device of TDM business, are applied to Packet Transport Network, and as shown in Figure 3, described device 300 comprises:
Detection module 310, for detection of and record TDM user's side and whether occur alarm.
Wherein, alarm status is dropout state, LOF state and/or occurs wherein one or more of alarm indication signal state.
The first pseudo wire PDU package module 320, when being labeled as TDM user's side and occurring alarm for described alarm, network side obtains in encapsulation obtains meeting the mark arranging in the first pseudo wire PDU that switching network requires, and the message of described the first pseudo wire PDU is less than the message size of the pseudo wire PDU obtaining based on data encapsulation to be sent;
Described pseudo wire PDU package module 320 is responsible for tdm data to be packaged into PWE3 pseudo wire PDU, its form as shown in Figure 5, use byte of padding (for example complete 1) pseudo wire PDU to be filled to the pseudo wire PDU that is less than former pseudo wire PDU and meets switching network requirement, best for meeting the minimum message size of switching network requirement, and protect civilian frequency encapsulation pseudo wire PDU during by normal condition.
Pseudo wire PDU sending module 330, for sending described pseudo wire PDU.
In the present embodiment, when the transmitting device of TDM business detect TDM user's side occur dropout state, LOF state or alarm indication signal any one time, network side no longer sends normal pseudo wire PDU, but use byte of padding to be filled to the pseudo wire PDU that is less than former pseudo wire PDU and meets network requirement, than original normal pseudo wire PDU, be much smaller, thereby reduced taking of network side broadband.
And when TDM user's side is normal condition, the second pseudo wire PDU package module can be encapsulated as the second pseudo wire PDU by the payload data of TDM business.
Described first, second pseudo wire PDU package module is with identical frequency encapsulation.
Embodiment tetra-
One embodiment of the invention also provide a kind of transmitting device of TDM business, are applied to Packet Transport Network, and as shown in Figure 4, described device 400 comprises:
Pseudo wire PDU receiver module 410, for receiving pseudo wire PDU;
The first pseudo wire PDU parsing module 430, for when described pseudo wire PDU is provided with alarm mark, with default byte of padding structure E1 frame.As when as described in during the set of L bit, use predetermined byte of padding (as complete 1) encapsulation E1 frame, when described L bit does not have set, the payload data in message is built to E1 frame, deliver to TDM interface and revert to TDM frame, revert to TDM frame.
Technical scheme of the present invention can be disposed in the TDM of PTN equipment related single-boards.Below in conjunction with above-described embodiment three and four, with reference to Fig. 7, describe the course of work of the transmitting device of TDM business provided by the invention in detail.
The frame processing module of the upper E1 plate of transmitting device A resolves and processes and detect on link whether have alarm to E1 frame, if LOS/LOF/AIS alarm changes, notice pseudo wire PDU package module upgrades encapsulation state.Pseudo wire PDU package module adopts different assembly strategies according to the alarm status of E1 interface.If without any alarm, according to user configured cascade, count N, N E1 frame is encapsulated in pseudo wire PDU.Fruit has any in LOS/LOF/AIS, uses to fill message (giving tacit consent to complete 1) pseudo wire PDU is filled to 64 bytes (being that N E1 frame constructed an important pseudo wire PDU equally), simultaneously by the L bit set in message.Then, transmitting device A sends message to master control, and master control sends on PSN network by NNI veneer.
After transmitting device B receives pseudo wire PDU, master control is transmitted to corresponding E1 plate.The first whether set of the L bit in detection messages of pseudo wire PDU detection module.If wherein not set of L bit, whether the size of verification pseudo wire PDU mates with user configured cascade number, if think that if inconsistent Abnormal Packet abandons coupling, the payload of pseudo wire PDU is sent to TDM frame processing module, the payload data structure E1 frame in message for TDM frame processing module.If the set of L bit, TDM frame processing module is used complete 1 payload structure E1 frame.
The maximum cascade number of supposing the support of E1 plate is N=40, and M2/M1=64/ (32*N+26)=5% as can be seen here, can save 95% network side flow when UNI breaks down when being configured to maximum cascade and counting.At present foreign department divides operator to use microwave as NNI interface, and speed is lower, use the present invention can reduce TDM break down after to the taking of the network bandwidth, improve bandwidth availability ratio.
Finally should be noted that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from the spiritual scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (13)
1. a transmission method for TDM business, is applied to Packet Transport Network, it is characterized in that, described method comprises:
Detect and record TDM user's side and whether occur alarm;
If there is alarm in TDM user's side, carry out encapsulation operation, obtain meeting the first pseudo wire PDU of switching network requirement, and in described the first pseudo wire PDU, alarm mark is set; The message of described the first pseudo wire PDU is less than the message size of the pseudo wire PDU obtaining based on data encapsulation to be sent;
Send described the first pseudo wire PDU.
2. transmission method according to claim 1, is characterized in that, the size of described the first pseudo wire PDU is to meet the minimum message size that switching network requires.
3. transmission method according to claim 1, is characterized in that, described alarm status is dropout state, LOF state and occurs one or more in alarm indication signal state.
4. method according to claim 1, is characterized in that, also comprises:
If TDM user's side is normal condition, after being encapsulated into the second pseudo wire PDU, the payload data of TDM business sends.
5. transmission method according to claim 4, is characterized in that, the frequency of encapsulation the first pseudo wire PDU is identical with the frequency of encapsulation the second pseudo wire PDU.
6. a transmission method for TDM business, is applied to Packet Transport Network, it is characterized in that, described method comprises:
Receive the pseudo wire PDU that network side sends;
Detect and in described pseudo wire PDU, whether be provided with alarm mark, when described alarm is labeled as TDM user's side and occurs alarm, network side obtains in encapsulation obtains meeting the mark arranging in the first pseudo wire PDU that switching network requires, and the message of described the first pseudo wire PDU is less than the message size of the pseudo wire PDU obtaining based on data encapsulation to be sent;
If be provided with alarm mark in described pseudo wire PDU, with default byte of padding structure E1 frame.
7. transmission method according to claim 6, is characterized in that, also comprises:
If alarm mark is not set in described pseudo wire PDU, with the payload data structure E1 frame of the TDM business encapsulating in described pseudo wire PDU.
8. a transmitting device for TDM business, is applied to Packet Transport Network, it is characterized in that, described device comprises:
Detection module, for detection of and whether record TDM user's side be alarm status;
The first pseudo wire PDU package module, for when alarm appears in TDM user's side, carries out encapsulation operation, obtains meeting the first pseudo wire PDU of switching network requirement, and in described the first pseudo wire PDU, alarm mark is set; The message of described the first pseudo wire PDU is less than the message size of the pseudo wire PDU obtaining based on data encapsulation to be sent;
Pseudo wire PDU sending module, for sending described the first pseudo wire PDU.
9. transmitting device according to claim 8, is characterized in that, the size of described the first pseudo wire PDU is to meet the minimum message size that switching network requires.
10. transmitting device according to claim 8, is characterized in that, also comprises:
The second pseudo wire PDU package module, for when TDM user's side is normal condition, is encapsulated as the second pseudo wire PDU by the payload data of TDM business.
11. transmitting devices according to claim 8, is characterized in that, described first, second pseudo wire PDU package module is with identical frequency encapsulation.
The transmitting device of 12. 1 kinds of TDM business, is applied to Packet Transport Network, it is characterized in that, described device comprises:
Pseudo wire PDU receiver module, for receiving pseudo wire PDU;
Detection module, for detection of whether being provided with alarm mark in described pseudo wire PDU, when described alarm is labeled as TDM user's side and occurs alarm, network side obtains in encapsulation obtains meeting the mark arranging in the first pseudo wire PDU that switching network requires, and the message of described the first pseudo wire PDU is less than the message size of the pseudo wire PDU obtaining based on data encapsulation to be sent;
The first pseudo wire PDU parsing module, for when described pseudo wire PDU is provided with alarm mark, with default byte of padding structure E1 frame.
13. transmitting devices according to claim 12, is characterized in that, also comprise:
The second pseudo wire PDU parsing module, for when described pseudo wire PDU does not arrange alarm mark, with the payload data structure E1 frame of the TDM business encapsulating in described pseudo wire PDU.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017166932A1 (en) * | 2016-03-29 | 2017-10-05 | 中兴通讯股份有限公司 | Method and apparatus for determining service state |
| CN109412827A (en) * | 2017-08-18 | 2019-03-01 | 南京南瑞继保电气有限公司 | A kind of distributed warning processing method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101572835A (en) * | 2008-04-30 | 2009-11-04 | 华为技术有限公司 | Method and device for information transmission and control management on data link layer in layered order address packet network |
| CN101778040B (en) * | 2009-12-31 | 2012-09-05 | 中兴通讯股份有限公司 | Method and device for realizing time division multiplex data transmission |
| CN101867455A (en) * | 2010-06-22 | 2010-10-20 | 中兴通讯股份有限公司 | Board-to-board information transferring method and device |
| CN102546204B (en) * | 2010-12-20 | 2015-10-28 | 中兴通讯股份有限公司 | The transmission method of TDM circuit emulation service remote alarm information and system |
| CN102325346B (en) * | 2011-06-29 | 2017-12-19 | 中兴通讯股份有限公司 | File transmitting method and base station controller |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017166932A1 (en) * | 2016-03-29 | 2017-10-05 | 中兴通讯股份有限公司 | Method and apparatus for determining service state |
| CN107241206A (en) * | 2016-03-29 | 2017-10-10 | 中兴通讯股份有限公司 | The method and device that a kind of business service state judges |
| CN107241206B (en) * | 2016-03-29 | 2022-02-18 | 中兴通讯股份有限公司 | Method, device and storage medium for judging service state |
| CN109412827A (en) * | 2017-08-18 | 2019-03-01 | 南京南瑞继保电气有限公司 | A kind of distributed warning processing method and system |
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