CN101854655B - Method of loopback fault positioning of IMA link and loopback fault handling device - Google Patents
Method of loopback fault positioning of IMA link and loopback fault handling device Download PDFInfo
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- CN101854655B CN101854655B CN200910081142A CN200910081142A CN101854655B CN 101854655 B CN101854655 B CN 101854655B CN 200910081142 A CN200910081142 A CN 200910081142A CN 200910081142 A CN200910081142 A CN 200910081142A CN 101854655 B CN101854655 B CN 101854655B
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Abstract
The invention provides a method of loopback fault positioning of an IMA link, which comprises the following steps that: a device A connected with an IMA link sends information to a device B through the IMA link, the information comprises Sa bit information of non-frame synchronization mark NFAS signals, and the Sa bit information is x; the device A receives information through the IMA link, the information comprises Sa bit information of NFAS signals, and the Sa bit information is y; when x = y, the device A determines that the IMA E1 link bearing the information has loopback, otherwise, the device A determines that the IMA E1 link has no loopback. According to the technical scheme provided by the invention, the problems of loopback fault positioning of the IMA link and subsequent treatment in a system are solved. The technical scheme provided by the invention has small changes in the existing system, can not affect system compatibility, realizes simplicity and high efficiency, and helps to improve system performance.
Description
Technical field
The present invention relates to digital communicating field, particularly, the present invention relates to a kind of IMA link method of loopback fault positioning and loopback troubleshooting equipment.
Background technology
At the 3G (Third Generation) Moblie initial stage, especially IP RAN (IP Radio Access Network, IP wireless access network) before, the transmission of Iub mouth adopts IMA (Inverse Multiplexing forATM, Inverse Multiplexing over ATM) E1 mode to insert usually.Situation such as transmission fault occur for untapped E1 link or a certain section link, the communication engineering maintenance personnel is accustomed to the E1 looper.
In the former communication system of above-mentioned way is feasible; Yet be different from the simple E1 bearing mode of second generation GSM, the transmission bearer that uses in the 3G (Third Generation) Moblie is " IMA+E1 " mode, because the notion of IMA group has been arranged, between the E1 link in the IMA group certain logical relation is arranged.The mode of ima protocol through inverse multiplexing is a plurality of low speed physical links, and for example the E1 link is tied to a high-speed link in logic, like Fig. 1, at transmitting terminal: IMA the size order of ATM code stream according to the logical links of IMA link number is distributed on every E1; Receive according to the size order of IMA logical links that every E1 carried number and recover the ATM code stream at receiving terminal end: IMA.
If with a certain E1 looper, can cause the IMA group professional chaotic, IMA organizes packet loss, even ima group failure, so loopback is a kind of fault for IMA.As shown in Figure 2, for a kind of typical case of the looper that needs are safeguarded on the engineering occurring.Under the normal condition, the annexation of device A and equipment B can be:
(device A) Tx0---(equipment B) Rx1;
(device A) Rx0---(equipment B) Tx1;
(device A) Tx1---(equipment B) Rx0;
(device A) Rx1---(equipment B) Tx0.
As shown in Figure 2, DDF with the transmitting terminal (Tx0) of the transmitting terminal (Tx1) of device A and receiving terminal (Rx1) and equipment B and receiving terminal (Rx0) loopback together.
Under the normal condition, the receiving terminal of device A side (Rx1) should be received the cell Cell A that equipment B is sent, but it has received the cell Cell b that loopback comes, and causes the IMA layer service chaotic.Simultaneously, in this case, for the device A side, occurred the IMA link of two logical links number repetitions in the IMA group, caused the IMA link unavailable, available bandwidth descends, and causes packet loss, even ima group failure.
In order to solve IMA link sn wrap-around issue, general method is whether each node of hand inspection exists looper, if there is loopback, then unlinking maybe, this link is set to unavailable (inhibit) state.Because there are a large amount of e1 resources in telecom operators, and transmission node is a lot, and looper is disguised strong, is difficult for discovering, and causes through manual method and is difficult to whether looper of investigation link.The loopback fault has following characteristics:
1) loopback is difficult for discovering
Have o lot of reasons can cause as since loopback to IMA group influence or phenomenon, so the attendant can not confirm whether the cause of problem relevant with loopback.
2) operability is poor
Since relate to a large amount of node devices, complicated network configuration and the skewness of NodeB, and the work of investigation loopback bothers very much.
3) processing time is long
Owing to reason such as above-mentioned, dealing with problems needs a period of time, makes the IMA group can long-time packet loss or fault.
4) there is bounce-back in link unavailable (inhibit) state
The link of unavailable for being in (inhibit) state, if start link-recovery (recover) state machine handshake mechanism again, this link still may be activated when the loopback fault still existed.
For these reasons, therefore, be necessary to propose a kind of efficient succinct processing scheme, to solve the problem of IMA link loopback fault positioning and subsequent treatment.
Summary of the invention
The object of the invention is intended to solve at least the problem of IMA link loopback fault positioning and subsequent treatment in one of above-mentioned technological deficiency, particularly resolution system.
For achieving the above object, one aspect of the present invention has proposed a kind of IMA link method of loopback fault positioning, may further comprise the steps:
The device A that connects IMA E1 link is sent information through IMA chain road direction equipment B, and said information comprises the Sa bit information of non-frame synchronization mark NFAS signal, and said Sa bit information is x;
Said device A receives information through the IMA link, and said information comprises the Sa bit information of NFAS signal, and said Sa bit information is y;
Work as x=y, said device A confirms that there is loopback in the IMA E1 link that carries said information, otherwise thinks that said IMA E1 link does not have loopback.
According to embodiments of the invention, said device A is a base station NodeB, and said equipment B is a radio network controller (RNC), perhaps
Said device A is a radio network controller (RNC), and said equipment B is a base station NodeB.
According to embodiments of the invention, said Sa bit information comprises a bit or a plurality of bit information in Sa4-Sa8 five bit informations in the non-frame synchronization mark NFAS signal.
According to embodiments of the invention, said device A confirms that the IMA E1 link that carries said information exists after the loopback, and said device A is deleted said IMA E1 link in the IMA group the dynamic logic.
According to embodiments of the invention, said device A is added after the IMA E1 link, carries out loopback detection through said Sa bit information, and when finding not have loopback, said device A dynamic logic in said IMA group increases said EI link.
According to embodiments of the invention, said device A is added after the IMA E1 link, carries out loopback detection through said Sa bit information, and when finding that said IMA E1 link does not have loopback, said device A dynamic logic in the IMA group increases said EI link.
The present invention has also proposed a kind of loopback troubleshooting equipment on the other hand, comprises sending module, receiver module, and judge module,
Said sending module is used for sending information through another equipment of IMA chain road direction, and said information comprises the Sa bit information of non-frame synchronization mark NFAS signal, and said Sa bit information is x;
Said receiver module is used for receiving the information that said another equipment sends through the IMA link, and said information comprises the Sa bit information of non-frame synchronization mark NFAS signal, and said Sa bit information is y;
Said judge module is used to judge whether the Sa bit of Sa bit and reception of transmission is identical, works as x=y, and said judge module confirms that there is loopback in the IMA E1 link that carries said information, otherwise thinks that said IMA E1 link does not have loopback.
According to embodiments of the invention, said judge module also comprises indicating module,
Said indicating module; Be used for confirming that the IMA E1 link that carries said information exists after the loopback; Indicate said judge module that said IMA E1 link is deleted the dynamic logic in the IMA group, said judge module also is used for said IMA E1 link is deleted from the interior dynamic logic of IMA group.
According to embodiments of the invention; Said judge module adds after the IMA E1 link; Said judge module carries out loopback detection through said Sa bit information; When finding not have loopback, said indicating module indicates said judge module dynamic logic in said IMA group to increase said EI link, and said judge module also is used for said IMA E1 link is increased to dynamic logic in the said IMA group.
According to embodiments of the invention, said Sa bit information comprises a bit or a plurality of bit information in Sa4-Sa8 five bit informations in the non-frame synchronization mark NFAS signal.
According to embodiments of the invention, said loopback troubleshooting equipment comprises base station NodeB or radio network controller (RNC).
The technical scheme that proposes according to the present invention has solved the problem of IMA link loopback fault positioning and subsequent treatment in the system.Through utilizing the SA bit of E1 link TS0 time slot; Can accurately monitor the IMA link in real time and the loopback situation whether occur; Technique scheme does not need artificial Attended Operation, and programming automation can realize, when finding that link occurring the loopback situation occurs; Can at utmost reduce the influence of loopback, and not have the bounce-back problem of link down state in the prior art after handling the IMA group.In addition, the technical scheme that the present invention proposes, very little to the change of existing system, can not influence the compatibility of system, and realize simply, efficiently helping the elevator system performance.
Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize through practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously with easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the sketch map of IMA principle of multiplexing;
Fig. 2 is the sketch map of DDF looper;
Fig. 3 is the flow chart of IMA link loopback fault positioning method;
Fig. 4 detects the sketch map of looper for Sa;
Fig. 5 dynamically deletes the sketch map of state machine transitions for the IMA link;
Fig. 6 dynamically adds the sketch map of state machine transitions for the IMA link;
Fig. 7 is the structural representation of IMA link loopback fault treating apparatus.
Embodiment
Describe embodiments of the invention below in detail, the example of said embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Be exemplary through the embodiment that is described with reference to the drawings below, only be used to explain the present invention, and can not be interpreted as limitation of the present invention.
The present invention proposes a kind of IMA link method of loopback fault positioning; May further comprise the steps: the device A that connects IMA E1 link is sent information through IMA chain road direction equipment B; Said information comprises the Sa bit information of non-frame synchronization mark NFAS signal, and said Sa bit information is x; Said device A receives information through the IMA link, and said information comprises the Sa bit information of NFAS signal, and said Sa bit information is y; Work as x=y, said device A confirms that there is loopback in the IMA E1 link that carries said information, otherwise thinks that said IMA E1 link does not have loopback.
As shown in Figure 3, the realization IMA link method of loopback fault positioning flow chart for the present invention proposes may further comprise the steps:
S101: device A is sent the NFAS signal that comprises the Sa bit information.
For the ease of understanding the present invention, the frame structure of the PCM in the IMA E1 link (Pulse CodeModulation, pulse code modulation) is made brief account.Usually; 0 time slot bear control information of the PCM frame in the E1 link; The signal of even frame 0 time slot is called FAS (Frame AlignmentSignal, frame synchronization mark), and the signal of odd-numbered frame 0 time slot is called NFAS (Not Containingthe Frame Alignment Signal; Non-frame synchronization mark), shown in the table specific as follows.
The present invention as above shown in the Sax (x=4-8) in the table, comes the IMA E1 link that this information is carried in detection and location whether to have loopback through utilizing one or more in back five bits in the frame do not comprise synchronizing signal.
In existing communication system, network side connects through IMA E1 link usually.Therefore, the device A that the present invention mentions, equipment B can be the equipment such as base station NodeB, RNC (RadioNetwork Controller, radio network controller), OAM (operation management maintain) node in the network.Obviously, the equipment that the present invention mentions is not limited only to above-mentioned some kinds of equipment of giving an example, and the present invention is applicable to that also other use IMA E1 link to realize connecting the equipment of communication.
In addition; When transmitting the Sa bit information, can use one or more bits, for example; The Sa bit information that device A is sent can be Sa4, Sa4Sa5, Sa4Sa5Sa6, Sa4Sa5Sa6Sa7, Sa4Sa5 Sa6Sa7Sa8, and corresponding respectively Sa bit information is represented with 1 to 5 bit.For example, when the Sa bit information was represented with 1 bit, this information can be distinguished two states, and 0 or 1.Obviously, five bits can carry the more information amount.
S102: the NFAS signal that comprises the Sa bit information that device A receiving equipment B sends.
In step S101, device A has write down the Sa bit information that sends, and for example is x, when receive that equipment B sends comprise the NFAS signal of Sa bit information the time, therefrom resolve and remove the Sa bit information, for example be y.When the Sa bit information was represented with 1 bit, x and y can only be two states, 0 or 1.When utilizing many bits to represent, for example represent with 5 bits, x=11111, same, y also representes with 5 bits, through contrast x and y, can judge whether to exist the link loopback.
S103: device A judges whether to exist IMA E1 link loopback according to the Sa bit information that sends and receive.
As embodiments of the invention, represent with 5 bits with the Sa bit information, for example; The Sa bit information x=11111 that sends when device A is, if the y=11111 that device A is received thinks that then there is loopback in this IMA E1 link; Otherwise think that this IMA E1 link does not have loopback, link is normal.
In order further to set forth the present invention, as shown in Figure 4, for detect the example of looper through the Sa information bit.In the present invention, Tx representes to send, and Rx representes to receive, the corresponding transmission and receiving terminal of sequence number 0,1 expression of back.
Device A is x through E1 transmitting terminal (Tx) to equipment B transmission Sa among the figure; It is y that equipment B is sent Sa through E1 transmitting terminal (Tx) to device A.
In figure the first half, device A the 0 road E1 receiving terminal (Rx) receives that Sa is y, and the Sa that sends with the 0 road E1 transmitting terminal (Tx) is different, can confirm that there is not loopback in device A the 0 road E1.In figure the latter half, device A the 1 road E1 receiving terminal (Rx) receives that Sa is x, and the Sa that sends with the 0 road E1 transmitting terminal (Tx) is identical, can confirm that there is loopback in device A the 0 road E1.Can find out and utilize Sa can judge quick and precisely whether the IMA link exists loopback.
Because in the existing scheme, when loopback appears in link, this link is placed unavailable (inhibit) state.For the link that is in down state, if start link-recovery (recover) state machine handshake mechanism again, this link still may be activated, but still can form the loopback attitude, still can impact IMA.
The technical scheme that proposes according to the present invention, after device A confirmed that there is loopback in the IMA E1 link of the said information of carrying, device A was deleted said IMA E1 link in the IMA group the dynamic logic.That is, have loopback if detect the IMA link, software program will be deleted this IMA link as early as possible from the interior dynamic logic of IMA group, and the influence that loopback is brought drops to minimum.As shown in Figure 5, be the state machine transitions figure of dynamic deletion in the IMA link of loopback is organized from IMA.
In addition, after device A is added IMA E1 link, carry out loopback detection through the Sa bit information, when finding not have loopback, device A dynamic logic in the IMA group increases said EI link.That is, remove if detect IMA link loopback, program should be with the former IMA group of this IMA link dynamic logic add-back.As shown in Figure 6, be state machine transitions figure with the IMA link add-back IMA group of loopback.
According to the proposed method, when a new IMA E1 link is connected on the equipment, can detect whether there is loopback earlier, when definite link just often, just add in the IMA group in the dynamic logic.That is, after equipment adds IMA E1 link, carry out loopback detection through above-mentioned Sa bit information, when finding that this IMA E1 link does not have loopback, equipment dynamic logic in the IMA group increases this EI link.The said method that the present invention proposes solved in the system, solved the problem of IMA link loopback fault positioning and subsequent treatment in the system.Through utilizing the SA bit of E1 link TS0 time slot; Can accurately monitor the IMA link in real time and the loopback situation whether occur; Technique scheme does not need artificial Attended Operation, and programming automation can realize, when finding that link occurring the loopback situation occurs; Can at utmost reduce the influence of loopback, and not have the bounce-back problem of link down state in the prior art after handling the IMA group.In addition, the technical scheme that the present invention proposes, very little to the change of existing system, can not influence the compatibility of system, and realize simply, efficiently helping the elevator system performance.
As shown in Figure 7, the present invention proposes a kind of loopback troubleshooting equipment 700, comprise sending module 730, receiver module 710, judge module 720.
Wherein, sending module 730 is used for sending information through another equipment of IMA chain road direction, and information comprises the Sa bit information of non-frame synchronization mark NFAS signal, and the Sa bit information is x; Receiver module 710 is used for receiving the information that another equipment sends through the IMA link, and information comprises the Sa bit information of non-frame synchronization mark NFAS signal, and the Sa bit information is y; Judge module 720 is used to judge whether the Sa bit of Sa bit and reception of transmission is identical, works as x=y, and judge module 720 confirms that there is loopback in the IMA E1 link of beared informations, otherwise thinks that this IMA E1 link does not have loopback.
Specific embodiment as the said equipment; Judge module 720 also comprises indicating module 721; Indicating module 721 is used for confirming that the IMA E1 link of beared information exists after the loopback; Indication judge module 720 is deleted IMA E1 link in the IMA group the dynamic logic, judge module 720 also is used for this IMA E1 link is deleted from the interior dynamic logic of IMA group.
Specific embodiment as the said equipment; Judge module 720 adds after the IMA E1 link; Judge module 720 carries out loopback detection through the Sa bit information; When finding not have loopback, indicating module 721 indication judge modules 720 dynamic logic in the IMA group increases this EI link, and judge module 720 also is used for this IMA E1 link is increased to dynamic logic in the IMA group.
As the specific embodiment of the said equipment, the Sa bit information comprises a bit or a plurality of bit information in five bit informations of Sa4-Sa8 in the non-frame synchronization mark NFAS signal.
As the specific embodiment of the said equipment, loopback troubleshooting equipment comprises base station NodeB or radio network controller (RNC).In existing communication system, network side connects through IMA E1 link usually.Therefore, the device A that the present invention mentions, equipment B can be the equipment such as base station NodeB, RNC (Radio Network Controller, radio network controller), OAM (operation management maintain) node in the network.Obviously, the equipment that the present invention mentions is not limited only to above-mentioned some kinds of equipment of giving an example, and the present invention is applicable to that also other use IMA E1 link to realize connecting the equipment of communication.
The said equipment that the present invention proposes solved in the system, solved the problem of IMA link loopback fault positioning and subsequent treatment in the system.Through utilizing the SA bit of E1 link TS0 time slot; Can accurately monitor the IMA link in real time and the loopback situation whether occur; Technique scheme does not need artificial Attended Operation, and programming automation can realize, when finding that link occurring the loopback situation occurs; Can at utmost reduce the influence of loopback, and not have the bounce-back problem of link down state in the prior art after handling the IMA group.In addition, the technical scheme that the present invention proposes, very little to the change of existing system, can not influence the compatibility of system, and realize simply, efficiently helping the elevator system performance.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (11)
1. an IMA link method of loopback fault positioning is characterized in that, may further comprise the steps:
The device A that connects IMA E1 link is sent information through IMA E1 chain road direction equipment B, and said information comprises the Sa bit information of non-frame synchronization mark NFAS signal, and said Sa bit information is x;
Said device A receives information through IMA E1 link, and said information comprises the Sa bit information of NFAS signal, and said Sa bit information is y;
Work as x=y, said device A confirms that there is loopback in the IMA E1 link that carries said information, otherwise thinks that said IMA E1 link does not have loopback.
2. IMA link method of loopback fault positioning as claimed in claim 1 is characterized in that said device A is a base station NodeB, and said equipment B is a radio network controller (RNC), perhaps
Said device A is a radio network controller (RNC), and said equipment B is a base station NodeB.
3. IMA link method of loopback fault positioning as claimed in claim 1 is characterized in that, said Sa bit information comprises a bit or a plurality of bit information in five bit informations of Sa4-Sa8 in the non-frame synchronization mark NFAS signal.
4. like one of any described IMA link method of loopback fault positioning of claim 1 to 3; It is characterized in that; Said device A confirms that the IMA E1 link that carries said information exists after the loopback, and said device A is deleted said IMA E1 link in the IMA group the dynamic logic.
5. IMA link method of loopback fault positioning as claimed in claim 4; It is characterized in that; Said device A is added after the IMA E1 link; Carry out loopback detection through said Sa bit information, when finding not have loopback, said device A dynamic logic in said IMA group increases said E1 link.
6. IMA link method of loopback fault positioning as claimed in claim 1; It is characterized in that; Said device A is added after the IMA E1 link; Carry out loopback detection through said Sa bit information, when finding that said IMA E1 link does not have loopback, said device A dynamic logic in the IMA group increases said E1 link.
7. a loopback troubleshooting equipment is characterized in that, comprises sending module, receiver module, and judge module,
Said sending module is used for sending information through another equipment of IMA E1 chain road direction, and said information comprises the Sa bit information of non-frame synchronization mark NFAS signal, and said Sa bit information is x;
Said receiver module is used for receiving the information that said another equipment sends through IMA E1 link, and said information comprises the Sa bit information of non-frame synchronization mark NFAS signal, and said Sa bit information is y;
Said judge module is used to judge whether the Sa bit of Sa bit and reception of transmission is identical, works as x=y, and said judge module confirms that there is loopback in the IMA E1 link that carries said information, otherwise thinks that said IMA E1 link does not have loopback.
8. loopback troubleshooting equipment as claimed in claim 7 is characterized in that said judge module also comprises indicating module,
Said indicating module; Be used for confirming that the IMA E1 link that carries said information exists after the loopback; Indicate said judge module that said IMA E1 link is deleted the dynamic logic in the IMA group, said judge module also is used for said IMA E1 link is deleted from the interior dynamic logic of IMA group.
9. loopback troubleshooting equipment as claimed in claim 8; It is characterized in that; Said judge module adds after the IMA E1 link, and said judge module carries out loopback detection through said Sa bit information, when finding not have loopback; Said indicating module indicates said judge module dynamic logic in said IMA group to increase said E1 link, and said judge module also is used for said IMA E1 link is increased to dynamic logic in the said IMA group.
10. loopback troubleshooting equipment as claimed in claim 7 is characterized in that, said Sa bit information comprises a bit or a plurality of bit information in Sa4-Sa8 five bit informations in the non-frame synchronization mark NFAS signal.
11., it is characterized in that said loopback troubleshooting equipment comprises base station NodeB or radio network controller (RNC) like the described loopback troubleshooting of one of claim 7 to 10 equipment.
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| CN1553671A (en) * | 2003-06-05 | 2004-12-08 | 深圳市中兴通讯股份有限公司南京分公 | Method for non-block user data transmission in reverse multiplexing process |
| CN1627755A (en) * | 2003-12-10 | 2005-06-15 | 华为技术有限公司 | Method of adjusting time delay in reversal multiplexing protocol of asynchronous transmission mode |
| CN101252470A (en) * | 2008-03-28 | 2008-08-27 | 中兴通讯股份有限公司 | Method for link self-loop test on IMA interface |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1553671A (en) * | 2003-06-05 | 2004-12-08 | 深圳市中兴通讯股份有限公司南京分公 | Method for non-block user data transmission in reverse multiplexing process |
| CN1627755A (en) * | 2003-12-10 | 2005-06-15 | 华为技术有限公司 | Method of adjusting time delay in reversal multiplexing protocol of asynchronous transmission mode |
| CN101252470A (en) * | 2008-03-28 | 2008-08-27 | 中兴通讯股份有限公司 | Method for link self-loop test on IMA interface |
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