KR100405848B1 - Remote System Control Apparatus and Method of ATM Network - Google Patents

Abstract

The present invention relates to an apparatus and method for controlling a remote system of an ATM network to control a remote system by setting a control path for controlling the remote system using an ICP cell.

Conventionally, in order to activate the IMA function of the remote system, a separate IPC channel for transferring control information necessary for activating the IMA function is required, thereby increasing costs.

The present invention includes control information for activating an IMA function in an unused area of an ICP cell periodically transmitted from a transmitting side to a receiving side, and uses control information included in an IMA message received at the receiving side. By reinterpreting the IMA function to activate the IMA function, the in-band control path can be used to deliver the control information required to activate the IMA function, thereby reducing the cost.

Description

Remote System Control Apparatus and Method of ATM Network

The present invention relates to an apparatus and method for controlling a remote system of an ATM network, and more particularly, to a remote system of an ATM network to control a remote system by setting a control path for controlling a remote system using an ICP control cell. A system control apparatus and method.

In general, inverse multiplexing for ATM (IMA) is a single circuit of n (1 ≦ n ≦ 32) T1 / E1 circuits being serviced based on Asynchronous Transfer Mode (ATM), as shown in FIG. In order to obtain n times T1 / E1 bandwidth, the IMA sender maintains a continuous cell stream at the physical layer and the cell (ICP cell) containing information that can periodically reconfigure the ATM cell at the IMA receiver. Send a cell for the (Filler Cell).

As described above, each link grouped into an IMA group transmits a frame composed of M 128 consecutive cells. As illustrated in FIG. 2, one ICP cell is included in one frame.

As described above, the ICP cell is a cell for reconstruction of the ATM cell stream at the IMA receiving side, periodically transmitted from the IMA transmitting side to the IMA receiving side, and is located at the same position of the IMA frame.

3 is a diagram illustrating the configuration of an ICP cell, and an ICP cell includes a header field of 5 bytes and an information field of 48 bytes. The contents of the ICP cell are shown in Table 1 below.

Octet Label Comments 1-5 ATM Cell Header Octet1-0000 0000, Octet 2-0000 0000, Octet 3-0000 0000, Octet4-0000 1011, Octet 5-0110 0100 (valid HEC) 6 OAM Label bits7-0: OAM Label value00000001: IMA Version 1.0 7 Cell ID andLink ID Bits7: IMA OAM Cell Type (0: Filler Cell, 1: ICP Cell) Bits6-5: Unused and set to 0Bits4-0: Logical ID for physical link range (0 .... 31) 8 ISN Frame Sequence Number (IFSN) IMA Frame Sequence Number: from 0 to 255 and cycling 9 ICP Cell Offset Range (0 ... M-1): Indicates position of ICP cell within the IMA frame 10 LSI (Link Stuff Indication) Bits7-3: Unused and set to 0Bits2-0: 111-No imminent stuff event, 100-Stuff event in 4 ICP cell locations (optional), 011-Stuff event in 3 ICP cell locations (optional), 010-Stuff event in 2 ICP cell locations (optional), 001-Stuff event at the next ICP cell location (mandatory), 000-This is one of the 2 ICP cells Comprising the stuff event (mandatory) 11 Status Control Change Indication Bits7-0: Status change indication: 0 to 255 and cycling (count to be incremented every change of octets 12-49) 12 IMA ID Bits7-0: IMA ID

13 Group Status Control Bits7-4: Group State0000-Start-up, 0001-Start-up-ACK, 0010-Config-Abort-Unsupported M, 0011-Config-Abort-Incompatible Symmetry, 01xx-Reserved for other Config Abort reasons, 1000-Insufficient- Links, 1001-Blocked, 1010-Operational, Others: ReservedBits3-2: Symmetry of Group 00-Symmetrical configuration and operation, 01-Symmetrical configuration and asymmetrical operation (optional), 10-Asymmetrical configuration and asymmetrical operation (optional), 11-ReservedBits1 -0: IMA Frame Lengh (00: M-32, 01: M-64, 10: M-128, 11: M-256) 14 Transmit Timing Information Bits7-6: Unused and set to 0Bits5: Transmit Clock Mode (0: ITC Mode, 1: CTC Mode) Bits4-0: Tx LID of the timing reference link (0 to 31) 15 Tx Test Control Bits7-6: Unused and set to 0Bits5: Test Link Command (0: inactive, 1: active) Bits4-0: Tx LID of test link (0 to 31) 16 Tx Test Pattern Bit7-0: Tx Test Pattern (value from 0 to 255) 17 Rx Test Pattern Bit7-0: Rx Test Pattern (value from 0 to 255) 18 Link 0 Information Bits7-5: Transmit StateBits4-2: Receive StateBits1-0: Rx Defect Indicators 19-49 Link 1-31 Information Status and Control of link with LID in the range 1-31 50 Unused Set to Ox6A as defined in ITU I.432 for unused bytes 51 End-to-end channel Proptietary channel (set to 0 if unused) 52-53 CRC Error Control Bit15-10: Reserved field for future use-default value coded all 0Bits9-0: CRC-10 as specified in ITU Recommendation I.610 [42]

As described above, in an ATM network using IMA as a physical layer, the IMA function is first activated, and then user traffic is transmitted and received using a virtual link connected through activation of the IMA function, thereby managing alarms, statistics, and billing. When configuring an ATM network including a remote system, in order to activate the IMA function of the remote system, as shown in FIG. 4, a separate IPC (Inter Process Communication) channel is out-banded. In the form of Band), control information for activating the IMA function is transmitted through the IPC channel, and the receiving side activates the IMA function based on the control information received through the IPC channel.

As described above, conventionally, in order to activate the IMA function of the remote system, a separate IPC channel for transmitting control information necessary for activating the IMA function is required to increase the cost.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and includes a control information capable of activating an IMA function in an unused area of an ICP cell periodically transmitted from a transmitting side to a receiving side, and receiving at the receiving side. Remote system control of ATM network to transfer control information through in-band control path by reinterpreting the IMA function to enable IMA function using control information contained in one IMA message. It is an object of the present invention to provide an apparatus and method.

1 is a conceptual diagram of an IMA.

2 is a view showing the configuration of an IMA frame.

3 is a diagram illustrating a configuration of an ICP cell.

4 is a view for explaining a remote system control method of a conventional ATM network.

5 is a diagram showing the configuration of a remote system control apparatus for an ATM network according to the present invention;

6 is a diagram illustrating a matching protocol stack structure between a TMN system and a remote system connected to an ATM network.

7 is a flowchart illustrating a method for controlling a remote system of an ATM network according to the present invention.

*** Explanation of symbols for the main parts of the drawing ***

10. TMN system, 15. ICP transmitter,

20. Remote system, 21. IMA processor,

23. ICP receiver, 25. ICP interpreter,

27.IMA Control

The remote system control apparatus of the ATM network according to the present invention for achieving the above object is provided in the TMM system, the remote system by including the control information necessary for activating the IMA function of the remote system in the unused area of the ICP cell ICP transmission unit for transmitting by; An ICP receiver provided in the remote system and extracting only a cell in which an IPC ID is stored in a specific region among the ICP cells received from the ICP transmitter; An ICP analyzer for interpreting control information included in the ICP cell extracted by the ICP receiver to reconstruct an internal IPC message; And an IMA controller for activating the IMA function based on the IPC message received from the ICP interpreter and generating a response message according to the activation of the IMA function.

Here, the control information, IPC ID; A group ID indicating a group number; The type of IMA group setup request; A port set in the group; A minimum number of transmit / receive links for the IMA group to go into operation; A link for extracting transmit / receive IMA data cell clock rates; Transmit and receive frame length; It is characterized by including the number of transmission and reception links created in the group.

The response message may include an IPC ID; A group ID indicating a group number; The type of IMA group setup request; A result according to the IMA group establishment request; A port set in the group; The state of Near-End and Far-End; Characterized in that it comprises a failure state.

On the other hand, the remote system control method of the ATM network according to the present invention, including the control information necessary for activating the IMA function of the remote system in the unused area of the ICP cell in the TMN system and transmitting to the remote system; Reading a value stored in a specific area of the received ICP cell by the remote system receiving the ICP cell and determining whether the read value is an IPC ID; If the read result is an IPC ID, interpreting / recognizing control information stored in the received ICP cell to reconstruct the IPC message, and transmitting the reconstructed IPC message to an IMA controller; Activating the IMA function based on the control information included in the IPC message by the IMA controller, generating a response message according to the activation of the IMA function, and transmitting the generated message to the TMN system; And performing a management of the remote system using a user cell transmitted and received through a connected virtual link due to activation of the IMA function in the TMN system.

Hereinafter, an apparatus and method for controlling a remote system of an ATM network according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, in the remote system control apparatus and method of the ATM network according to the present invention, in order to activate the IMA function of the remote system, control information necessary for activating the IMA function is included in the unused area of the ICP cell and transmitted.

As described in the description of the prior art, an ICP cell is a cell that is periodically transmitted from a transmitting side to a receiving side, and 32 bytes are allocated in an information field to store information about each link. Since the maximum number of links is 16, an area in which information about the remaining 16 links is stored is not used.

Accordingly, in the present invention, in order to activate the IMA function of the remote system, the TMN system 10 stores and transmits control information necessary for activating the IMA function in an unused area of the ICP cell, which is newly added and stored in the ICP cell. The contents are shown in Table 2.

Name Type Comments IPC ID 1 Byte Oxb8 Group ID 1 Byte Group number (1 to 4) Kind 1 Byte 1: create, 2: add, 3: group_delete, 4: link_delete, 5: change, 6: confirm, 7: reload {goes down when rebooting the board (MSP, AMC, IMA) with no configuration response). LinkInGroup 1 Byte Displays the set ports in the group in the order of the low order bits from the high byte in one byte (1: setting, 0: not) Symmetry 1 Byte Symmetric Operation (1), Asymmetric Operation (2), Asymmetric Configuration (3) MinNumTxLinks 1 Byte Minimum number of Tx links for IMA group to go into operation MinNumRxLinks 1 Byte Rx minimum number of links for IMA group to go into operation NeTxClkMode 1 Byte CTC (1), ITC (2) FeTxClkMode 1 Byte CTC (1), ITC (2) TxTimingRefLink 1 Byte Link for Tx IMA Data Cell Clock Rate Extraction (0: not configured in the IMA Group) 1 ... 8 RxTimingRefLink 1 Byte Rx IMA data cell clock rate extraction link (0: not configured in the IMA Group) 1 ... 8 TxFrameLengh 1 Byte 1: M-32, 2: M-64, 3: M-128, 4: M-256 RxFrameLengh 1 Byte 1: M-32, 2: M-64, 3: M-128, 4: M-256 NumTxCfgLinks 1 Byte Number of Tx links created in the group NumRxCfgLinks 1 Byte The number of Rx links created in the group

Here, the IPC ID may be stored in an area in which information about the link 31 is stored (hereinafter referred to as a link 31 information area).

Accordingly, the receiving side of the ICP cell reads the data stored in the link 31 information area, and if the read data is an IPC ID, it determines that the control information necessary for activating the IMA function is included in the corresponding ICP cell.

On the other hand, the remote system that receives the ICP cell containing the control information for IMA activation from the TMN system performs the IMA function activation based on the control information included in the ICP cell, and transmits a response to the TMN system The contents stored in the response ICP cell are shown in Table 3 below.

Name Type Comments IPC ID 1 Byte Oxb9 Group ID 1 Byte Group number (1 to 4) Kind 1 Byte 1: create, 2: add, 3: group_delete, 4: link_delete, 5: change, 6: confirm Result 1 Byte 1: NOK, 2: OK LinkInGroup 1 Byte Displays the ports set in the group in order from the low order bit to the highest order of the byte (1: On, 0: not) Nestate 1 Byte 1: notConfigured, 2: startUp, 3: startUpAck, 4: configAbortUnsupportedM, 5: configAbortIncompatibleSymmetry, 6: configAbortOther, 7: insufficientLinks, 8: blocked, 9: operational, 10: configAbortUnsupportedImaVersion Festate 1 Byte FailureStatus 1 Byte noFailure (1): startUpNe (2), startUpFe (3), invalidMValueNe (4), invalidMValueFe (5), failedAsymmetricNe (6), failedAsymmetricFe (7), insufficientLinksNe (8), insufficientLinksFe (9), blockedNe (10) ), blockedFe (11), otherFailure (12), invalidImaVersionNe (13), invalidImaVersionFe (14) ** Information on the status of the group that is actually used.

5 is a road showing the configuration of a remote system control apparatus for an ATM network according to the present invention, including an ICP transmitter 15, an ICP receiver 23, an ICP analyzer 25, and an IMA controller 27. Is done.

In such a configuration, the ICP transmitter 15 is provided in a Telecommunication Management Network (TMN) system 10 that manages / controls the operation and status of all systems connected to the ATM network, and the unused area of the ICP cell. The control information for activating the IMA function of the remote system 20 is included in the link 16 information area to the link 31 information area and transmitted to the remote system 20.

Since the ICP receiver 23 may receive the ICP cell of the link from the IMA processor 21 connected to the IMA link, the ICP receiver 23 receives the ICP cell periodically transmitted by the ICP transmitter 15 of the TMN system 10 and receives the received ICP cell. The value stored in the link 31 information area of the ICP cell is read, and only the cell determined to be a cell including control information necessary for activating the IMA function is extracted from the received cell and transmitted to the ICP analysis unit 25.

The ICP analysis unit 25 analyzes / determines the control information included in the corresponding area (link 16 information area to link 30 information area) of the ICP cell received from the ICP receiving unit 23, and reconstructs the necessary internal IPC message. The reconstructed IPC message is applied to the IMA control unit 27.

The IMA control unit 27 performs IMA processor 21 to perform an appropriate operation by performing IMA configuration, link addition, link deletion, group enable, group disable, etc. based on the IPC message authorized from the ICP analyzer 25. It is configured to enable, and generates a result message for it and transmits to the TMN system 10.

FIG. 6 illustrates a matching protocol stack structure between a TMN system connected to an ATM network and a remote system, and both the TMN system 10 and the remote system 20 connected to an ATM network using an IMA as a physical layer are both ICP protocols. The ICP protocol is equipped with an in-band control layer for receiving or transmitting an ICP cell from a large station, and an IMA layer.

In addition, an in-band management layer (IML) for analyzing an ICP cell received from an in-band control layer is mounted on the in-band control layer, and a transmission control (TC) layer is mounted on the IMA layer. In the above, a unit management layer is installed that activates the IMA function based on the control information received from the IML and generates a result message.

7 is a flowchart illustrating a method for controlling a remote system of an ATM network according to the present invention.

First, the TMN system 10 transmits a remote system (in the unused area (link 16 information area to link 31 information area) of an ICP cell that is periodically transmitted to the remote system 20 to manage the remote system 20). After including the control information for activating the IMA function of 20), and transmits the ICP cell to the remote system 20 through the primary in-band control path (①) (S10).

Thereafter, the ICP receiver 23 of the remote system 20 that receives the ICP cell from the TMN system 10 through the primary in-band control path ① is stored in the link 31 information area of the received ICP cell. The value is read to determine whether the value stored in the link 31 information area is the IPC ID (S12, S14).

As a result of the determination in step S14, if the value stored in the link 31 information area is the IPC ID, the ICP cell received in step S12 is transferred to the ICP analyzer 25 (S16), and the ICP analyzer ( In 25), the control information stored in the corresponding area of the received ICP cell is interpreted / determined, and the information related to the activation of the IMA function is reconfigured into an IPC message and transmitted to the IMA controller 27 (S18).

The IMA control unit 27 having received the IPC message in step S18 performs an IMA function of the corresponding IMA group by performing group enable, group disable, link addition, and link deletion based on the control information included in the IPC message. Is configured to be activated, and transmits a response message thereto to the TMN system 10 through the primary in-band control path (①) (S20).

If the IMA group is activated under the control of the IMA control unit 27 in step S20, the TMN system 10 transmits the ICP cell through the primary in-band control path ②.

In addition, when the IMA function is activated, the virtual link is connected to enable transmission / reception of a user cell. Thus, the remote system 20 uses a user cell to manage management information such as alarms, statistics, and billing, using a second in-band control path. It is transmitted to the TMN system 10 through (③) (S22), the secondary in-band control path (③) by selecting / determining the VPI / VCI (Virtual Path Identifier / Virtual Channel Identifier) of the user cell The user cell will be delivered to the unit management layer.

As described above, the unit management layer that receives the user cell through the secondary in-band control path (③) interprets the management information included in the user cell received from the remote system 20 to generate alarms, statistics, and billing. And so on (S24).

The apparatus and method for controlling a remote system of an ATM network of the present invention is not limited to the above-described embodiments and may be variously modified and implemented within the scope of the technical idea of the present invention.

According to the apparatus and method for controlling a remote system of an ATM network of the present invention as described above, transmission including control information for activating an IMA function in an unused area of an ICP cell periodically transmitted from a transmitting side to a receiving side is transmitted. And, by re-interpreting the IMA function to enable the IMA function by using the control information included in the IMA message received at the receiving side, the control information necessary for activating the IMA function using the in-band control path It can be delivered to reduce the cost.

Claims (4)

An ICP transmitter provided in the TMM system and including control information necessary for activating the IMA function of the remote system in an unused area of the ICP cell and transmitting to the remote system; An ICP receiver provided in the remote system and extracting only a cell in which an IPC ID is stored in a specific region among the ICP cells received from the ICP transmitter; An ICP analyzer for interpreting control information included in the ICP cell extracted by the ICP receiver to reconstruct an internal IPC message; And an IMA control unit for activating the IMA function based on the IPC message received from the ICP analysis unit and generating a response message according to the IMA function activation. The method of claim 1, wherein the control information, An IPC ID; A group ID indicating a group number; The type of IMA group setup request; A port set in the group; A minimum number of transmit / receive links for the IMA group to go into operation; A link for extracting transmit / receive IMA data cell clock rates; Transmit and receive frame length; Device for remote system control of ATM network, characterized in that it comprises the number of transmission and reception links made in the group. The method of claim 1, wherein the response message, An IPC ID; A group ID indicating a group number; The type of IMA group setup request; A result according to the IMA group establishment request; A port set in the group; The state of Near-End and Far-End; Device for remote system control of the ATM network, characterized in that comprises a failure state. Transmitting control information necessary for activating the IMA function of the remote system to an unused area of the ICP cell in the TMN system to transmit to the remote system; Reading a value stored in a specific area of the received ICP cell by the remote system receiving the ICP cell and determining whether the read value is an IPC ID; If the read result is an IPC ID, interpreting / recognizing control information stored in the received ICP cell to reconstruct the IPC message, and transmitting the reconstructed IPC message to an IMA controller; Activating the IMA function based on the control information included in the IPC message by the IMA controller, generating a response message according to the activation of the IMA function, and transmitting the generated message to the TMN system; And performing management of the remote system using a user cell transmitted and received through a connected virtual link due to activation of the IMA function in the TMN system.