CN101252470A

CN101252470A - Method for link self-loop test on IMA interface

Info

Publication number: CN101252470A
Application number: CNA2008100663841A
Authority: CN
Inventors: 吴学德; 闫磊
Original assignee: ZTE Corp
Priority date: 2008-03-28
Filing date: 2008-03-28
Publication date: 2008-08-27
Anticipated expiration: 2028-03-28
Also published as: CN101252470B

Abstract

The invention discloses a loop-back detecting method of a chain circuit on the IMA interface, the loop-back detecting method comprises the following steps: A, a chain circuit E1 in the IMA group is selected as a loop-back detecting chain circuit, the chain circuit ID of the chain circuit E1 is a first ID value; B, the value of end-to-end channel field of ICP cell transmitted through the IMA group is set as any value R from 1 to 255; C, the ICP cell received on the chain circuit E1 is captured, the chain circuit ID is analyzed as a second ID value, and the value of the end-to-end channel field is analyzed as a second field value; D, when the second ID value is equal to the first ID value, and the second field value is equal to R, the success of the loop-back chain circuit E1 is judged, the loop-back warning of the chain circuit E1 is reported, and simultaneously, the chain circuit E1 in the IMA group is set as unavailable; otherwise, the loop-back chain circuit E1 is unsuccessful, and if the chain circuit E1 is in the loop-back warning state, the restoration of the loop-back warning of the chain circuit E1 is reported, and the chain circuit E1 is installed as available. The condition of certain loop-back chain circuit in the IMA group can be automatically judged through a procedure in the loop-back detecting method, and the loop-back chain circuit is automatically eliminated, to ensure the normal work of the IMA.

Description

The method that a kind of IMA interface uplink detects from ring

Technical field

The present invention relates to communication technical field, relate in particular in the detection method of ring certainly of carrying out carrying out between interconnected communication equipment physical link based on ima protocol.

Background technology

Inverse Multiplexing over ATM (IMA-Inverse Multiplexing for ATM) is the method that a kind of logical links that many low speed physical links (as E1/DS1) are multiplexed into relative high speed that ATM Forum (Asynchronous Transfer Mode) tissue proposes transmits ATM cell.Its basic functional principle is that unit is distributed on each bar physical link in turn with the cell in transmitting terminal ATM data flow as shown in Figure 1, goes out the ATM data flow at receiving terminal according to same order recovery.The IMA communicating pair comes consultation parameter and mutual both sides' state information by a kind of special ICP (IMA Control Protocol-IMA ControlProtocol) cell, as long as make have that a physical link is normal in the IMA group just can operate as normal, so very strong failure tolerant ability is arranged.Use ima protocol can make full use of transfer resources such as existing a large amount of E1/DS1, can provide simultaneously higher relatively transmission rate to satisfy the needs of current growing data service, therefore be widely used in the various communication interfaces, as the IUB interface of WCDMA/TD-SCDMA system based on the ATM transmission.

In the process of reality use IMA networking, find, the network maintenance staff is through quality of certain bar chain road direction one end in the IMA group being tested physical transfer from the method for ring commonly used, but whether ring successfully needs manually to judge (as seeing whether upper-layer protocol is working properly) certainly, very inconvenient; In addition, because the characteristic of ima protocol itself can cause entire I MA to organize when oneself encircles when certain the bar link in the IMA group can't operate as normal, if having done certainly sometimes, the attendant forgets ring cancellation certainly after the ring, or ring has certainly been carried out in misoperation under unwitting situation, all may cause network paralysis, can only manual intervention go to remove behind ring and could recover, obviously this is insufferable for a commercial network.For example: (this is the general language of this area to the IUB in the WCDMA system between NODEB and the RNC, need not Chinese) interface uses E1 IMA mode to communicate, as a rule the NODEB distributing position is wider, and and passed through complicated transmission equipment between the RNC and transferred, so when network opening or diagnostic test, often need to use method that certain bar E1 link is detected from encircling.The general mode of using is to disconnect all E1 earlier to connect on the distributing frame of RNC side, then certain bar E1 is encircled certainly towards the NODEB side, arrange personnel to observe ATM upper-layer protocol SSCOP simultaneously and whether can pass to this E1 of judgement from encircling success or not at the NODEB machine room, must cancel the ring certainly of this E1 afterwards and put logical other E1 and normally connect, whole process relatively wastes time and energy.

Therefore, still there is defective in prior art, needs to improve.

Summary of the invention

The objective of the invention is: provide and carry out the method that link detects from ring under a kind of ima protocol, this method can be judged the situation that the link among the IMA encircles certainly automatically, makes things convenient for the test of engineering maintenance personnel to link.

The present invention solves the problems of the technologies described above the technical scheme that is adopted to be:

1, a kind of IMA interface uplink may further comprise the steps from the method that ring detects:

A link in A, the selected IMA group is designated as first link as detecting link from ring, and the link ID of described first link is an ID value;

B, send icp cell to described IMA group, the value of " end-to-endchannel " field of described icp cell is set to be used to characterize any value that this field is a user mode, is designated as first field value;

The icp cell of receiving on C, described first link of intercepting and capturing, the link ID that resolves in the described icp cell is the 2nd ID value, and " end-to-end channel " field value of resolving in the described icp cell is second field value;

D, whether equal an ID value, and whether described second field value equal first field value, judge that described first link is from whether success of ring according to described the 2nd ID value.

Described method, wherein: described step D comprises following processing:

When D11, described the 2nd ID value equal a described ID value and described second field value and equal first field value, judge this first link from encircling successfully,

D12, report this first link for from encircling alarm status, in described IMA group, be set to this first link unavailable simultaneously to the backstage.

Described method, wherein: described step D comprises following processing:

D21, when described the 2nd ID value and a described ID value does not wait or described second field value and first field value when not waiting, determine that described first link is not from ring;

D22, judge whether described first link is in from encircling alarm status;

D23, be in when encircling alarm status when definite described first link, then report this first link for from encircling the alarm clearing state, and this first link be set to available to the backstage.

Described method, wherein: described first field value is set between 1-255.

Described method, wherein: described first field value is set at random.

Beneficial effect of the present invention is: adopt method of the present invention, can make things convenient for the test of engineering maintenance personnel to link greatly by the situation of a certain link among the procedure judges IMA from ring; Simultaneously can be by being set to down state from this first link that encircles successfully, automatically will from IMA, reject from first link of ring, guaranteed the normal use of other links in the IMA group, and, detect the back and cancel the ring certainly of this first link automatically in time, make it participate in again consulting, the disaster of having avoided link to be had a mind to or be not intended to interrupt from the next network of endless belt with the state of opposite end link.Simultaneously, utilization of the present invention be field useless in the ima protocol, can the normal process of IMA not had any impact.

Description of drawings

Fig. 1 is an IMA operation principle schematic diagram;

Fig. 2 encircles detection procedure figure certainly for the present invention.

Embodiment

With embodiment the present invention is described in further detail with reference to the accompanying drawings below:

Referring to Fig. 2, the inventive method has been utilized " end-to-endchannel " field among the ima protocol control cell ICP, agreement stipulates that this field is privately owned field, and this field value is 0 when not using, and the value that changes this field does not influence any processing of ima protocol.Now the detection of the ring certainly processing procedure with NODEB is that example is described in further detail the present invention:

Step 1, disposed after the IMA group, start a task and regularly carry out the detection of ring certainly that IMA organizes each bar E1 link, a link E1 in the at first selected IMA group is designated as first link as detecting link from ring, and the link ID of this first link (Link ID) is an ID value X;

Step 2, send icp cell to described IMA group, the value that " end-to-endchannel " field of icp cell is set is being used to beyond 0 to characterize any value that this field is a user mode, is designated as the first field value R.Because " end-to-end channel " field is 8bit, and this field value is 0 when not using, so the R value can be any value between the 1-255.For the accuracy that detects, the R value is preferably the value of change at random between the 1-255, and for example, the current operation time of the system that obtains is as random value R, the value after the promptly current running time mould 256.

The icp cell of receiving on step 3, the intercepting and capturing E1 link, the Link ID that resolves in the described icp cell is the 2nd ID value, and " end-to-end channel " field value of resolving in the described icp cell is second field value;

Step 4, whether equal the ID value X of first link, and whether described second field value equal the field value R that sets among the step B, judge that the E1 link is from whether success of ring according to described the 2nd ID value.The value that why will compare end-to-end channel and Link ID simultaneously, be because end-to-end channel sends on the icp cell of all links in IMA group simultaneously, detect the 2nd ID value and an ID value of transmission and whether equate the cross-coupled situation of link during can get rid of IMA organizes.

Described step 4 comprises following concrete processing: when the 2nd ID value equals X, and second field value is when equaling R, judges that this E1 link from encircle successfully, can carry out step 5, otherwise, judge that this E1 link does not encircle certainly, goes to step 6.

Step 5, report this E1 link for from encircling alarm status to the backstage, simultaneously this E1 link is set to unavailablely in described IMA group, the state that promptly no longer participates in the opposite end link is consulted.Skip to step 8.

Step 6, judge that whether this E1 link is in from encircling alarm status, if encircle alarm status certainly, goes to step 7, otherwise goes to step 8;

Step 7, be in when encircling alarm status when definite E1 link, then report the E1 link from encircling alarm clearing to the backstage, and the E1 link be set to available, during the state that makes the E1 link participate in the IMA group is again consulted.

Step 8, next the bar link that skips in the step 1 selection IMA group restart from encircling testing process.

This process can be finished automatically by the NODEB program after using method provided by the invention, in whole testing process, other E1 links in the IMA group still can operate as normal, therefore alarm can be passed to the webmaster backstage by the OM channel between NODEB and RNC, the attendant can just can see the result of link from ring at RNC side machine room, no longer need the last station of personnel, alleviated workload greatly; And can remove automatically from the link of ring, with assurance IMA operate as normal, the problem of avoiding negligence of operation to bring.

Be understandable that, for those of ordinary skills, can be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, and all these changes or replacement all should belong to the protection range of the appended claim of the present invention.

Claims

1, a kind of IMA interface uplink is characterized in that from the method that ring detects, and may further comprise the steps:

2, method according to claim 1 is characterized in that: described step D comprises following processing:

3, method according to claim 2 is characterized in that: described step D comprises following processing:

D22, judge whether described first link is in from encircling alarm status;

4, according to the described method of the arbitrary claim of claim 1 to 3, it is characterized in that: described first field value is set between 1-255.

5, method according to claim 4 is characterized in that: described first field value is set at random.