CN1396776A

CN1396776A - Method for access device to automatically obtain IMA configuration parameters

Info

Publication number: CN1396776A
Application number: CN 01120255
Authority: CN
Inventors: 潘珺
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2001-07-12
Filing date: 2001-07-12
Publication date: 2003-02-12
Anticipated expiration: 2021-07-12
Also published as: CN1135006C

Abstract

A method for access device to autoamtically obtain IMA configuration parameter features that during the initialized setting up of IMA modular register in access device, the IMA configuration parameter is extracted from ICP information element received via the communication link. Its advantage is automatic IMA configuration by base station controller.

Description

A kind of method of access device to automatically obtain IMA configuration parameters

(1) technical field:

The present invention relates to the method for access device to automatically obtain IMA (Inverse Multiplexing over ATM, the ATM=Asynchronous Transfer Mode) configuration parameter in the mobile communication system.

(2) background technology:

When on existing DS1/E1 or DS3/E3 (being used to transmit the physical interface of ATM cell) physical link, carrying ATM cell, because the physical link speed of ATM is higher, the speed that often surpasses a DS1/E1 or DS3/E3 physical link, therefore need tie up IMA link group of composition to one or more DS1/E1 or DS3/E3 physical link with ima protocol, the relative ATM of this link group is a virtual physical link, form by one or more physical link, in order to the carrying ATM cell.Like this, when using ima protocol to transmit the ATM business, need be configured the IMA parameter of network side and access side, so that DS1/E1 of one or more or DS3/E3 physical link can be formed an IMA link group.Carry out the IMA parameter configuration, present method is in the network side parameter identical with the access device human configuration, comprises ima protocol version number, clock module, frame length, symmetric pattern, and the interior used physical link of IMA group etc.Because a good distance off usually between access device in the practical application and the network side, base station (BTS) and the base station controller (BSC) in CDMA (code division multiple access) system for example, and access device generally is unattended, can increase the inconvenience and the cost of maintenance in the local configure parameter of access side, if be used for the IMA parameter configuration by in system, increasing additional safeguard signaling transmission link and equipment, then can increase the system equipment cost, networking cost and maintenance cost, as seen, existing to carry out the method complexity of human configuration IMA parameter at access device higher, and maintenance cost is also higher.

(3) summary of the invention:

At the problems referred to above, the object of the present invention is to provide a kind of method of access device to automatically obtain IMA configuration parameters, use this method to carry out the IMA parameter configuration of access device, can reduce the complexity of system maintenance cost and IMA parameter configuration.

For achieving the above object, the method for access device to automatically obtain IMA configuration parameters provided by the invention comprises: in the access device side,

(1) finishes initialization setting, guarantee that this device can receive the icp cell that far-end sends from link the IMA module register;

(2) receive icp cell after, the reserved field of header and cell is carried out legitimate verification, what guarantee to receive is correct icp cell;

(3) resolve icp cell, extract the IMA configuration parameter in the icp cell;

(4) obtain current group of interior number of links of being joined by the IMA ID in the icp cell on each bar link (IMA sign) field, finish the binding of link in the group;

(5) the IMA configuration parameter that obtains is reported the access control unit of access device, the access control unit is according to the IMA module of the configuration parameter configuration access device that reports.

Described reserved field to header and cell carries out legitimate verification, finishes by the ATM cell head (ATM cell header) of preceding 5 bytes of checking icp cell and the source identity (cellID) of the 7th byte.

Because the IMA configuration parameter that extracts the icp cell that the present invention can utilize the far-end that receives from communication link to send carries out the IMA configuration of access device, replaced traditional IMA parameter configuration of manually carrying out passed through, reach the complexity of simplifying access device IMA parameter configuration, the purpose of reduction system maintenance cost, and helped reducing equipment cost.

(4) description of drawings:

Fig. 1 uses IMA networking connection layout of the present invention;

Fig. 2 is the flow chart of the embodiment of the invention.

(5) embodiment:

For purpose of the present invention, feature, beneficial effect and embodiment are had clear and definite understanding, the present invention is described in detail below in conjunction with accompanying drawing.

The bandwidth price of using IMA can solve ATM compares problem.At present, by using IMA, can assemble many E1/T1 (being used to transmit the physical interface of ATM cell) link, the speed raising bandwidth with each E1/T1 link realizes the amount of bandwidth that adapts with its application.For example, when using IMA equipment that the bandwidth of four T1 links is bundled, the bandwidth of supposing a T1 link is 1.5Mbps, and then the virtual connection to service provider network is 6Mbps.In group of ima protocol 32 physical links can be arranged, IMA equipment can bundle them forms an IMA group, and synthetic bigger, the more open-ended logical pipe of its sets of bandwidths, and its bandwidth price is than far better.If a T1 link occurs fault wherein, data traffic will continue to be distributed on all the other links, and when the service of the link-recovery that breaks down, data traffic can redistribute in the link in whole group automatically, and connection is returned to level at full speed.Owing to the likelihood ratio that many T1 access link break down simultaneously is less, make IMA also support the redundancy of this link, improved reliability of data transmission.

For supporting the binding of above-mentioned multilink, to form the IMA link group, need to carry out the configuration of parameter at network side and access side simultaneously, adopt method provided by the invention, can reduce the complexity and the cost of described parameter configuration.The present invention is applicable to the ATM transmission equipment and the access device of various use IMA technology, for example between the base station and base station controller in the wireless communication system, the Node B (base station) of WCDMA (Wideband Code Division Multiple Access (WCDMA)) system, the BTS (base transceiver station) of cdma2000 etc. are so that access device can obtain the IMA configuration parameter automatically.

ATM system for reality, owing in the ICP of IMA (ima protocol control unit) cell, carried the basic parameter of IMA group: the version number (OAM Label) that the 6th byte in the icp cell is ima protocol, the 11st byte is symmetric pattern and the frame length that group state and control field (Group Status andControl) include group, the 14th byte is that transmit timing information field (Transmit Timing information) comprises the clock module parameter, this Several Parameters also is at the major parameter that inserts the side configuration, and the version number of ima protocol must be identical with symmetric pattern, therefore, the access device that carries out parameter configuration if desired can guarantee to obtain icp cell from communication link, then after this access device is received the icp cell that network side sends, parameter above promptly can extracting from cell is carried out parameter configuration, and can confirm according to IMA ID identical in the icp cell on each link (IMA sign) field need with in which bar link configuration to a group.

Fig. 1 uses IMA networking connection layout of the present invention.Network side shown in the figure and access device all comprise the IMA module, in order to communicate the binding of link and the transmission of cell of data according to ima protocol.Network side described in the figure is according to the parameter configuration of system's operate as normal, when the IMA module of the icp cell that carries network side IMA configuration parameter by DS1/E1 among the figure or DS3/E3 physical link arrival access device, after the IMA module of access device is received icp cell, verify its correctness by the value of judging header and reserved field, if the icp cell that receives is correct, the correct icp cell received of IMA module parses then, obtain far-end, it is the configuration parameter of the IMA link group of network side, version number as ima protocol, symmetric pattern, frame length and clock module etc., and then the identical physical link of IMA ID in the icp cell is assigned in IMA group, at last, the IMA module is given the control unit of access device the correct reporting parameters that obtains, by the IMA module of control unit down distributing configuration data to access device, the IMA that sets up access device and network side is connected.

Fig. 2 is the flow chart of the embodiment of the invention.According to Fig. 2, when enforcement is of the present invention, at first carry out step 1, create the task of distal end I CP being carried out periodic access, to guarantee to obtain the icp cell that sends from far-end; In step 2, access device is finished the initialization setting to IMA device register, guarantees that this device can receive the icp cell that far-end sends from link.For example, Mt90220 IMA chip for actual access device employing, the Linktype that needs the PCM port of its chip of initialization is E1, the PCM form is a universal PC M pattern, the type that receives cell is for receiving all icp cells, enable the Rx pcm interface, and initialization receive clock polarity triggers along (frame synchronizing signal triggers along relevant with concrete veneer logic) with frame synchronizing signal; In step 3, after access device is received icp cell, reserved field to header and cell carries out legitimate verification, judge whether the icp cell that receives is correct, described checking mainly is the frame head to preceding 5 bytes of icp cell, and promptly the source identity (Cell ID) of ATM cell head (ATM cell header) and the 7th byte is verified, verify its whether with regulation value consistent, be correct icp cell with what guarantee to receive.If the icp cell that receives is incorrect, this cell is not carried out any operation, continuation is judged the follow-up icp cell that receives, otherwise carry out step 4, described icp cell is resolved, extract the configuration information of the distal end I MA group that comprises in the cell, i.e. IMA configuration information is as parameters such as ima protocol version number, frame length, symmetric pattern and clock modules.Obtain current group of interior number of links of being joined by the IMA ID in the icp cell on each bar link (IMA sign) field, finish the binding of link in the group, and the control unit of described reporting parameters being given access device; Carry out step 5 at last, issue the IMA module of parameter configuration command configuration access device according to the IMA configuration parameter that obtains by the control unit of access device, and then the communicating by letter of realization and far-end.In another embodiment of the present invention, behind the IMA configuration parameter of above-mentioned steps 5 by the access device acquisition, directly dispose the IMA module, do not report the access control module.

Use the present invention in actual applications, for example after the base station is suspended to base station controller, automatically obtains the IMA parameter from base station controller and carry out IMA configuration and initialization, can go into operation then, the progress of can the quickening system building reduces cost.

Claims

1, a kind of method of access device to automatically obtain IMA configuration parameters comprises: in the access device side,

(3) resolve icp cell, extract the IMA configuration parameter in the icp cell;

2, the method for obtaining the IMA configuration parameter automatically according to claim 1, it is characterized in that: described reserved field to header and cell carries out legitimate verification, finishes by the ATM cell head (ATM cell header) of preceding 5 bytes of checking icp cell and the source identity (cell ID) of the 7th byte.

3, the method for obtaining the IMA configuration parameter automatically according to claim 1 is characterized in that: described step (5) is replaced by following content: directly dispose the IMA module according to the IMA configuration parameter that obtains.