KR20060086508A - Method for state management of dual processor board in wireless communication system - Google Patents

Abstract

The present invention relates to a method for managing a state of a redundant processor board that can eliminate information loss and malfunction of blocks caused by switching to an active board of a standby board by managing a standby board by checking whether a backup of the redundant board is completed. The present invention relates to a method of managing a state of a redundant processor board in a wireless communication system. When a status polling request message is received from a status block, a keep alive message for checking a status of a standby board is transferred to the standby board. Transmitting, and if a response message corresponding to the request message is received from the standby board, checking whether the redundant backup of the standby board is completed, and the status of the standby board only when the redundant backup is completed. To Normal It characterized in that it comprises the step of Li.

Redundant Processor, Standby Board, Status Clearance, Keep Alive

Description

How to Manage the Status of a Redundant Processor Board in a Wireless Communication System {METHOD FOR STATE MANAGEMENT OF DUAL PROCESSOR BOARD IN WIRELESS COMMUNICATION SYSTEM}             

1 is a view showing a schematic structure of a redundant processor board according to the prior art,

2 is a diagram illustrating a state management method of a redundant processor board according to the present invention;

The present invention relates to a duplication board of a wireless communication system, and more particularly, to a method of managing a state of a duplication processor board to prevent information loss or abnormal operation of blocks caused by a transfer operation in a duplication board.

In general, a communication system includes a master board and a plurality of slave boards. In this structure, the plurality of slave boards transmit and receive clocks or signals that they will use, respectively, with the master board through the backplane. In this case, the master board further includes a standby board performing the same function as the master board for the reliability of the system, and the active board and the standby board (operating the master board which is important for system operation in an active state) Redundant board with standby board operating in standby state.

As described above, board redundancy includes an active board and a standby board, which are important for system operation. The board is redundant when an active board operating in an active state fails while performing a task or is discontinued due to the needs of the system. In this case, the standby board, which was in the standby state, is transferred to the active board so that work processing can be continued without interruption.

As the state management method of the redundant board as described above, it is largely divided into the method by software and the method by hardware. Hereinafter, only the duplication board by software directly related to the present invention will be described, and a description of the method by the hardware will be omitted.

The state management method of the redundant board by the software is performed in a normal state, by transmitting an interrupt signal or a disconnect signal determined by the active board to the standby board to operate the standby board in an active state, Provide reliability in terms of software or hardware.

Hereinafter, a state management method of the redundant board by the general software will be described in detail with reference to FIG. 1.                         

1 is a diagram illustrating a schematic structure of a general redundant processor board for explaining a state processing procedure of a board of a redundant processor according to the prior art.

Referring to FIG. 1, the redundant processor board is composed of an active board 101, a standby board 103, and a state block 105, where the active board and the standby board are configured as a failure agent agent software (Agent S / W). For example, the block AAGHX will be described. That is, FIG. 1 illustrates a board state processing procedure corresponding to the case where the state block 105 requests status polling of a processor board for the AAGHX.

First, the fault handling agent software block AAGHX is used in a Top ATM switching network (TAN), a RNC common & supplementary interface (RCSI), a radio access network controller (RNC), a base station transceiver subsystem (BTS), and the like. It acts as a common agent for operation and maintenance (ONM).

The AAGHX detects hardware alarms and software alarms on the board and transfers the data to RNC Status Handling eXecution (RFHX), which is a failure block, using an inter process communication (IPC) method. A response to a keep-alive (Keep Alive) request of a printed circuit board assembly (PBA) is transmitted.

In addition, the fault agent processing software block AAGHX is loaded for alarm detection on all boards of each system processor, and polling status information of the processor from RSHX and BSHX blocks, which are state blocks for each system, as follows. Is asked.

Hereinafter, when the status block 105 requests status polling of the processor board from the AAGHX, the board status transmission method will be described with respect to the case where the system processor board is a single board and a redundant board. .

First, a case of a single neutralization board will be described with reference to FIG. 1. Assuming that the AAGHX 101 is operating normally, the AAGHX 101 receiving the polling request message Keep Alive Req from the status block 105 indicates that the board is normal to the status block 105. Notify sends a Response Message (Keep Alive Rsp). Here, one of several tasks executed by the AAGHX 101 on a board or tasks may be normally performed on the current block to the state block according to whether the AAGHX block is normally executed. Represents the status.

Next, a case of a redundant board will be described with reference to FIG. 1. Typically, the IPC message can be received from each of the active board 101 and the standby board 103, but IPC message transmission to other boards is possible only from the active board 101. That is, the standby board 103 of the redundant board cannot respond to the board status polling request message from the status block 105.

Accordingly, the state management of the standby board 103 may be performed when the AAGHX of the active board 101 receives a polling request message from the state block 105. Send an active request message to AAGHX.

In this case, the active board 101 AAGHX receives whether the standby board 103 responds to the AAGHX, and then transmits the active board 101 and the status information of the standby board 103 in a response message. .

Then, in the status block 105 that receives the response message, the board keep alive response message according to the above process is confirmed. In this case, when the state of the board is Fault for a predetermined number of times, a processor down alarm is generated for the board, thereby enabling the system operator to recognize fault information of the board.

On the other hand, in the case of the redundant processor as described above, if there is no failure in the standby board, the transfer is performed. At this time, the switching of the board is performed only when the state of the active board and the standby board is normal.

In the redundant processor board, when the standby board is mounted after mounting or when the active board becomes standby by a man machine communication (MMC) transfer command, the standby board A redundant backup operation is performed through the active board.

In this case, according to the processor state management procedure as described above, even if the redundant backup is not finished, if the AAGHX of the standby board normally operates, the state of the standby board is recognized as normal (Normal) and managed. Therefore, when the board switchover is performed in the above situation, the standby board on which the redundant backup is not completed operates as the active board. As described above, a block operating in an active board in a state in which the redundant backup is not completed has a problem in that it cannot perform a normal function or cause information loss.

Therefore, the present invention was devised to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a redundant processor standby board to prevent abnormal operation of a block and loss of information when performing a transfer of a redundant board in a communication system. It is to provide a state management method of.

Another object of the present invention, when determining whether the standby board is normal, redundant processor standby board to check whether the redundant backup to eliminate the problems that may occur when the transfer is performed in the state that the redundant backup is not completed It is to provide a state management method of.

Another object of the present invention is to provide a state management method of a redundant processor standby board capable of checking whether a task (Task) is normally operated in the redundant processor board and whether the standby backup is completed.

Another object of the present invention is to determine that the status of the board as abnormal (Fault) when all the blocks of the board are not completed, even when the task of the standby board is in operation, and standby only when all the redundant backup is completed An object of the present invention is to provide a state management method of a redundant processor standby board for managing a board state as normal.

Still another object of the present invention is to manage the state of a standby board as normal only when the redundant backup is completed, and when the standby board is switched to the active board, the redundant backup is not completed and operates abnormally. The purpose of the present invention is to provide a state management method of a redundant processor standby board.

Redundant board state management method according to an embodiment of the present invention for achieving the above object; A method of managing a state of a redundant processor board in a wireless communication system, the method comprising: when a status polling request message is received from a status block, transmitting a keep alive message for determining a status of a standby board to the standby board; When a response message corresponding to the request message is received from the standby board, checking whether the standby backup is completed or not, and if the redundant backup is completed, normalizes the state of the standby board. It is characterized by its methodological composition.

Redundant board state management method according to an embodiment of the present invention for achieving the above object; A method of managing a state of a redundant processor board in a wireless communication system, the method comprising: when a status polling request message is received from a status block, transmitting a keep alive message for determining a status of a standby board to the standby board; If a response message corresponding to the request message is received from the standby board, checking whether the standby backup is completed or not. If the redundant backup is not completed, the status of the standby board is abnormal. Transmitting the status information to the status block, and if the redundancy backup is completed as a result of the check, transmitting the status information to the status block to normalize the state of the standby board. It is characterized by the methodological configuration.

Redundant board state management method according to an embodiment of the present invention for achieving the above object; A method of managing a state of a redundant processor standby board in a wireless communication system, the active board confirms whether a keep alive message is received from a state block, and if a keep alive message is received from the state block, the keep alive message is sent to a standby board. Transmitting a message; checking whether a response message corresponding to the keep alive message is received from the standby board; and if the response message is not received as a result of the check, an active / standby board as the status block. Transmitting the status as Normal / Fault, and receiving the check result response message, checking whether the standby board is completed with the redundant backup, and if the redundant result is not completed If not, active / standby to the state block. Transmitting the board status as Normal / Fault, respectively, and if the redundant result is completed, the status block sends the active / standby board status to Normal / Normal, respectively. Including the process of transmitting to the feature of the method configuration.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Prior to the description of the present invention, the terms or words used in the specification and claims described below should not be construed as being limited to the ordinary or dictionary meanings, and the inventors should consider their own invention in the best way. For the purpose of explanation, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention on the basis of the principle that it can be appropriately defined as the concept of term. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only one of the most preferred embodiments of the present invention, and do not represent all of the technical idea of the present invention, which can be replaced at the time of the present application It should be understood that there may be various equivalents and variations.

First, in the state management method of the redundant processor standby board according to the prior art, the state management is performed by simply checking whether a task is operating in the standby board. However, in this case, the standby board may operate as an active board without the redundant backup. At this time, the block that is operated on the active board in the state that the redundant backup is not completed as described above will not be able to perform a normal function or cause information loss.

According to the present invention, when the state of the standby board is determined, not only the task operation on the standby board, but also the completion of the redundant backup is checked. In other words, even if the task of the standby board is in operation, if all the blocks of the board do not have the backup of redundancy, the status of the board is managed as a fault to prevent the switchover in advance. By managing the state of the standby board to normal (Normal), it is possible to prevent the loss of information or a block that is abnormally operated by the transfer performed in the prior art.

In other words, even if the task of the standby board is in operation, if all the blocks of the board do not complete the redundant backup, the status of the standby board is reported as a fault (Fault) only when the redundant backup is completed. It is related to the state management method of the redundant processor standby board to remove the abnormal operation when the redundant backup is not completed when the standby board is transferred to the active board.

As described above, the present invention proposes a state keep alive processing procedure of each board state of a communication system. A typical state processing software block is a program that runs on a base station transceiver subsystem (BTS) and a main processor of a radio access network controller (RNC). Request Keep Alive of the board or redundant processor board. The state processing agent software block then monitors the state change of the boards after receiving the state information of the boards. Then, if the state is maintained for a certain period of time, it is recognized as a failure and provides a processor down alarm, and the Graphical User Interface (GUI) software block of the Universal Resource Manager (URM) causes the operator to fail the system. Be alert to the situation.

The present invention aims to prevent problems that may occur in system management by improving a method of managing a standby alive state of a redundant processor board in the failure agent software block.

On the other hand, the configuration of the basic software block according to an embodiment of the present invention has the same structure as in FIG. However, in the present invention, the configuration of the software block is the same, but in case of transmitting a response to the state block of FIG. That is, even when the response is received from the standby board of FIG. 1, the response message is transmitted to the status block by being divided into normal or fault according to whether the standby board has completed the redundant backup.

In order to perform the above function, the present invention proposes new messages as follows. Hereinafter, a standby board state management method of the present invention using the messages will be described.

msg_ReqPollingState_StsAag

First, the status block sends a status polling request message to each board every two seconds. The actual data structure is as follows.

As described above, each field of the data structure includes an hdr for storing an identifier for distinguishing a message, a board_type for storing a board identifier for distinguishing different types of boards, and a number of boards from one type of board. It consists of a board_id field.

-MSGTYPE_AAGH_KEEP_ALIVE_REQ

Next, the active board receiving the status polling request transmits a Keep Alive message to the standby board to determine the status of the standby board. The actual data structure is as follows:

As described above, the field of the data structure includes only an hdr field in which an identifier (ID) for distinguishing a message is stored.

-MSGTYPE_AAGH_KEEP_ALIVE_RSP

Next, the standby board receiving the Keep Alive message from the active board transmits a response message including its simple board information to the active board. The actual data structure is as follows:

As described above, each field of the data structure is directly connected to an hdr storing an identifier (ID) for distinguishing a message, a wBdSide storing side information (A side or B side) of a board, and an ATM switch. In case of the board, it consists of a bLvdsSel field which stores information on which side of the ATM switch board is actively connected.

msg_RspPollingState_AagSts

Next, the active board manages the state of the standby board as Fault if a response is not received within a timeout time after transmitting a Keep Alive request message to the standby board. On the other hand, if a response is received within the timeout period, the active board checks whether the standby board is redundantly backed up using a function provided by the redundant block. If the redundant backup is completed afterwards, the standby board state is managed as normal. In this case, if the redundant backup is not completed, even if a response is received from the standby board, the standby board is managed as a fault and the information is transmitted to the status block. The actual data structure is as follows:

As described above, each field of the data structure includes an hdr for storing an identifier for distinguishing a message, a board_type for storing a board identifier for distinguishing different types of boards, and a number of boards from one type of board. Board_id indicating, act_side containing information about active side giving A side or B side, prc_a_state containing whether A side board is Normal or Fault, B side board's state is normal Prc_b_state that indicates whether the backup is complete or not, and prc_stb_backup that indicates whether the standby board has completed the redundant backup.If the board is directly connected to the ATM switch, which side of the ATM switch board is active It consists of baLvdsSts which contains the information of ovld and ovld field which contains the CPU overload of the board.

Hereinafter, an exemplary embodiment of the present invention for performing the above function will be described with reference to the accompanying drawings.

2 is a diagram illustrating a state management procedure of a redundant processor standby board according to the present invention.

Referring to FIG. 2, an active board first checks whether a keep alive message is received from a status block. When the keep alive message is received from the status block (step 201), the active board drives a timer and transmits the keep alive message to the standby board (step 203).

Then, the active board checks whether a response message corresponding to the Keep Alive message is received from the standby board within a timeout time according to the timer driving (step 205). In this case, if a response message is not received from the standby board, the active board transmits an active / standby board state as normal / abnormal, respectively (step 211).

On the other hand, when the response message corresponding to the Keep Alive message is received, the active board checks whether the redundant backup of the standby board is completed (step 207). In this case, when the redundant backup is not completed, the active board transmits an active / standby board state as normal / abnormal to the state block, respectively (step 211).                     

On the other hand, when the redundant backup of the standby board is completed, the active board transmits the active / standby board status to the normal / normal (Normal) / normal (Normal), respectively (step 209).

As shown in FIG. 2, the present invention determines that the standby board is in a fault state when a response does not come within a timeout time when the standby board is herniad or abnormal. In addition, even when the response is transmitted, it is checked whether a redundant backup is completed, and when the backup is not completed, the state of the standby board is determined as a fault. Through this, in the present invention, it is possible to prevent in advance the loss of information or abnormal operation of the block appearing when the standby board transfer.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

As described above, according to the method for managing the state of the redundant processor board in the wireless communication system of the present invention, when determining whether the standby board state is normal, the system checks whether the redundant backup is performed, and if the redundant backup is not completed, a fault occurs. By managing the standby board to prevent the transfer of the standby board, it is possible to prevent the loss of information or malfunction of the status block caused by the transfer of the standby board regardless of whether the conventional backup is completed.

In addition, even when a task of a standby board is in operation, by checking whether the redundant backup of all the blocks of the board is completed, and managing the state of the standby board as normal only when the redundant backup is completed, the standby This has the advantage of eliminating problems that may occur when the board is switched to the active board.

Claims (13)

A method of managing a state of a redundant processor board in a wireless communication system, When a status polling request message is received from a status block, transmitting a keep alive message to the standby board to determine the status of the standby board, When a response message corresponding to the request message is received from the standby board, checking whether the standby board has completed the redundant backup; And managing the state of the standby board as normal only when the redundant backup is completed. The method of claim 1, The standby board receiving the request message from the active board further comprises the step of transmitting a response message including its status information to the active board. The method of claim 1, The active board further includes the step of driving a timer after sending a keep alive request message to the standby board, And if a response message from the standby board is not received within a timeout time corresponding to the timer driving, managing the state of the standby board as a fault. The method of claim 1, If the redundant backup is not completed, the method characterized in that for managing the status of the standby board (Fault). The method of claim 1, The active board checks whether the redundant backup is completed by using a function provided by the redundant board. A method of managing a state of a redundant processor board in a wireless communication system, If a status polling request message is received from the status block, transmitting a keep alive message to the standby board to determine the status of the standby board, When a response message corresponding to the request message is received from the standby board, checking whether the standby board has completed the redundant backup; When the redundant backup is not completed as a result of the checking, transmitting the state information to the status block to make the standby board state abnormal; And if the duplication backup is completed as a result of the checking, transmitting the state information to the state block to make the state of the standby board normal. The method of claim 6, The standby board receiving the request message from the active board further comprises the step of transmitting a response message including its status information to the active board. The method of claim 6, The active board further includes the step of driving a timer after sending a keep alive request message to the standby board, If a response message from the standby board is not received within a timeout time corresponding to the timer driving, status information for setting the standby board status to Fault is transmitted to the status block. The method. The method of claim 6, The active board checks whether the redundant backup is completed by using a function provided by the redundant board. A method of managing a state of a redundant processor standby board in a wireless communication system, The active board checks whether the keep alive message is received from the status block, and when the keep alive message is received from the status block, transmitting the keep alive message to the standby board; Checking whether a response message corresponding to the keep alive message is received from the standby board after transmitting the message; If the response message is not received as a result of the check, transmitting an active / standby board state as normal / abnormal to the status block, respectively; When the check result response message is received, checking whether the redundant backup of the standby board is completed; If the redundant backup is not completed, transmitting the active / standby board state as normal / abnormal to the status block; And when the redundant backup is completed, transmitting an active / standby board state to the status block as normal / normal respectively. The method of claim 10, The standby board receiving the request message from the active board further comprises the step of transmitting a response message including its status information to the active board. The method of claim 11, If a keep alive message is received from the status block, further comprising driving a timer; If a response message is not received within the timeout time according to the timer driving, the status block manages an active / standby board state as normal / abnormal. If a response message is received within the timeout period according to the timer driving, determining whether the standby board has completed the redundant backup. The method of claim 11, The active board checks whether the redundant backup is completed by using a function provided by the redundant board.

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