KR100433918B1 - Apparatus and Method for Loading in Switching System - Google Patents

Abstract

The present invention relates to a loading apparatus and a method of a switch for loading a file by varying a cell rate.

Conventionally, there is a problem that the cell transfer speed between the SMP and the MP is fixed, so that the loading speed of the MP having a large file size is significantly lowered and the overall loading time is delayed. In addition, when the loading of a specific MP is delayed, there is a problem in that an entire function of the exchange is performed due to the inherent function that the loading MP does not perform.

The present invention can improve the loading speed of the MP by loading the file by varying the cell transfer rate in accordance with the size of the files loaded in each MP and the available cell transfer rate. In addition, by allocating an available cell transmission rate to the MP currently being loaded, ATM resources can be efficiently utilized.

Description

Apparatus and Method for Loading in Switching System

The present invention relates to a loading apparatus and method of the exchange, and more particularly to a loading apparatus and method of the exchange to be able to load a file by varying the cell rate (Cell Rate).

1 illustrates a road, a disk 10, a SMP (System Management Processor) 20, a plurality of Main Processors (40), and an Asynchronous Transfer Mode (ATM) switch. It comprises 30.

In such a configuration, the disk 10 stores an application program file required for operating an exchange, a processor loading data (PLD) to be loaded into each MP 40, and the like. As described above, the PLD is information (program location, file size, etc.) of a program to be loaded in each MP 40 implemented in a database format. The PLD has the same number as the number of MPs present in the system. . That is, if there are n MPs present in the system, there are n PLDs.

The SMP 20 is a processor that is in charge of maintenance of the exchanger. When the SMP 20 is directly connected and started by the disk 10 and the Small Computer Systems Interface (SCSI) method, the SMP 20 receives the necessary application program files from the disk 10. The SMP 20 includes a system loading handler (SLH) 25, which is a loading server, and the SLH 25 stores a PLD and an application file stored in the disk 10 according to a loading request of the MP. Read it and send it to the MP that requested loading.

The MP 40 is connected to the SMP 20 through an ATM switch 30, and includes a processor loading handler (PLH) 45 that is a loading client. The PLH 45 is a SLH of the SMP 20. A request for loading is received at 25 to receive an application program file, a PLD, etc. from the SMP 20 through an IPC (Inter Process Communication) method. Here, the cell transmission rate between the MP 40 and the SMP 20 is fixed.

As described above, since the disk 10 in which application files and PLDs, etc. necessary for operating the exchange are stored is connected to the SMP 20 and not to the MP 40, the MP 40 is started. In order to perform a function assigned to the user, the SMP 20 needs to be loaded, and an application program necessary for performing a function is loaded from the SMP 20 in an IPC manner.

FIG. 2 is a flowchart illustrating a conventional loading method of an exchange. When an arbitrary MP, for example, MP (b) is started, the operating system starts up the PLH of the MP (b) (S10).

Thereafter, the PLH of the MP (b) started up in the process S10 requests the PLD loading to the SLH 25 of the SMP 20 to receive the PLD from the SLH 25 (S12 and S14).

In step S12, the SLH 25 requesting the PLD loading from the PLH of the MP (b) grasps the MP (b) requesting the PLD loading, and stores the PLD allocated to the identified MP (b). Read from and transmit to PLH of MP (b) that requested PLD loading by IPC method.

In step S14, the PLH of the MP (b) loaded with the PLD from the SLH 25 generates a list of blocks to be loaded from the SLH 25 based on the PLD loaded from the SLH 25 (S16). Then, the files to be loaded into the SLH 25 are requested based on the loading block list generated in step S16, and the files are loaded from the SLH 25 at a fixed cell transmission rate according to the file loading request (S18, S20).

In step S18, the SLH 25, which is requested to load a file from the PLH of the MP (b), reads the files requested to be loaded from the disk 10 in units of blocks of a predetermined size according to the file loading request and loads them in an IPC manner. Transmit to PLH of MP (b) requested.

Thereafter, the PLH of the MP (b) loaded with the blocks from the SLH 25 in the process S20 records the blocks loaded from the SLH 25 in a predetermined memory area, and when the loading of all the blocks is finished, the loaded program file Start (S22).

As described above, in the conventional exchange, when the loading is performed, data stored in the disk 10 is transmitted by the IPC method, and the cell transmission speed between the SMP 20 and the MP 40 is fixed. Therefore, loading is performed at a constant transmission speed for all MPs.

Therefore, conventionally, there is a problem that the loading speed of the MP having a large file size is significantly lowered.

For example, assuming that the sum of the sizes of the files loaded in MP (a) is significantly larger than the sum of the sizes of the files loaded in MP (b), MP (a) and MP (b) transmit the same cell. Since the loading is performed at a speed, when the loading time of the MP (a) compared with the loading time of the MP (b), it takes a lot of loading time of the MP (a).

In addition, the total loading time is the point at which all the MPs are finished loading, and there is a problem in that the overall loading time is delayed when the loading of a specific MP is delayed.

In addition, when the loading of a specific MP is delayed, there is a problem in that an entire function of the exchange is performed due to the inherent function that the loading MP does not perform.

The present invention has been made to solve the above-described problem, and by loading the file by varying the cell transfer rate variably according to the size of the files to be loaded and the available cell transfer rate, it is possible to improve the loading speed of the MP It is an object of the present invention to provide a loading device and a method of an exchanger.

1 is a view showing a configuration of a loading apparatus of a conventional exchanger.

2 is a flowchart for explaining a loading method of a conventional exchange.

Figure 3 is a view showing the configuration of a loading device of the exchanger according to the present invention.

4 and 5 are flowcharts for explaining a loading method of the exchanger according to the present invention.

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

110. disk,

120.System Management Processor (SMP),

123.System Loading Handler (SLH),

125. cell transmission rate management unit,

130. ATM switch,

140.Main Processor (MP),

145. Processor Loading Handler (PLH)

An apparatus for loading an exchange according to the present invention for achieving the above object includes: a disk storing a processor loading data (PLD) and various files necessary for operating the exchange; A system management processor coupled to the disk; In the loading device of the exchanger comprising a plurality of main processors for receiving the PLD and files from the system management processor in the IPC method, the system management processor, based on the size of the files to be loaded in each main processor A system loading driver for calculating a maximum cell transmission speed of the processor; And a cell transfer rate management unit configured to calculate and allocate a cell transfer rate between the main processor requesting loading and the system loading driver based on the sum of currently available cell transfer rates.

On the other hand, the loading method of the exchange according to the present invention, in the loading method of the exchange for loading the PLD (Processor Loading Data) stored in the disk in the system management processor and various files required for the operation of the exchange to a plurality of main processors, Calculating a maximum cell transmission rate for each main processor by a system loading driver provided in the system management processor; Requesting, by the system loading driver, a cell transmission rate allocation of a main processor requesting PLD loading to a cell transmission rate management unit included in the system management processor by referring to the calculated maximum cell transmission rate according to a PLD loading request; Allocating a cell transmission rate of the main processor according to the cell transmission rate allocation request by the cell transmission rate management unit; Reading, by the system loading driver, the PLD of the main processor from a disk based on the cell transmission rate allocated by the cell transmission rate management unit to a main processor in an IPC manner; Reading, by the system loading driver, the files requested for loading from the disk in units of blocks of a predetermined size according to the file loading request of the main processor, and transmitting the files to the main processor by IPC method; When the loading of all the files to the main processor is finished, the system loading driver may request to release the cell transmission rate from the cell transmission rate management unit to release the cell transmission rate allocated to the main processor.

Here, the maximum cell transfer rate of each main processor is a value obtained by dividing the sum of the sizes of the files loaded in the main processor by the sum of the sizes of the files loaded in each main processor and the cell transfer rate available in the system management processor. It is characterized by being calculated by multiplying the sum of.

The allocating of the cell transmission rate may include: determining whether a currently available cell transmission rate is greater than a cell transmission rate requested to be allocated by the system loading driver; Allocating the requested cell rate as it is if the currently available cell rate is greater than the requested cell rate; Calculating and allocating an optimal cell transmission rate if the currently available cell transmission rate is smaller than the requested cell transmission rate; Re-adjusting and allocating cell transmission rates of all main processors to which a current cell transmission rate is assigned; In the process of recording the readjusted cell transmission rate, the requested cell transmission rate, and the time point at which the system loading driver is allocated in the table of the main processor that is requested to allocate the cell transmission rate from the system loading driver. Characterized in that made.

The optimal cell transfer rate is a value obtained by dividing the sum of the sizes of the files loaded in the corresponding main processor by the sum of the sizes of the files loaded in each main processor and the sum of the cell transfer rates currently available in the system management processor. It is characterized by being calculated by the multiplication operation.

The cell transmission rate to be re-adjusted is a value obtained by dividing the total size of files loaded in the corresponding main processor by the total size of files loaded in the main processor to which the current cell transmission speed is allocated and the system management processor. It is characterized in that it is calculated by multiplying the sum of the available cell transmission rate.

The releasing of the cell transmission rate may include: releasing a cell transmission rate allocated to a corresponding main processor according to a cell transmission rate release request, and increasing an available cell transmission rate by the released cell transmission rate; If there is a main processor that has not been allocated as many as the cell transfer rate is requested, the cell transfer rate of the main processor is increased to the cell transfer rate requested by the system loading driver by using the available cell transfer rate. Characterized in that made.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the loading device and method of the exchanger according to a preferred embodiment of the present invention.

3 is provided with a road, a disk 110, an SMP 120, a plurality of MPs 140, and an ATM switch 130 showing a configuration of a loading device of an exchange according to the present invention.

In such a configuration, the disk 110 stores an application program file necessary for operating an exchange, a PLD to be loaded in each MP 140, and the like.

The SMP 120 is a processor that is in charge of maintenance of the exchanger. The SMP 120 is directly connected to the disk 110 in a SCSI manner, and includes a loading server SLH 123 and a cell transmission rate management unit 125.

As described above, the SLH 123 calculates a maximum cell transmission rate of each MP 140 based on the size of files to be loaded into each MP 140, and the cell transmission rate management unit 125 transmits currently available cells. Based on the sum of the speeds, the cell transmission speed between the MP and the SLH 123 which requested the loading is calculated and assigned.

Meanwhile, the MP 140 is connected to the SMP 120 through the ATM switch 130 and includes a loading client PLH 145. The PLH 145 is the SLH 123 of the SMP 120. The application file, PLD, etc. are transmitted from the SMP 120 through the IPC method by requesting the loading.

4 and 5 are flowcharts for explaining a loading method of the exchange according to the present invention. FIG. 4 is a description of the operation from the perspective of SLH, and FIG. 5 is a description of the operation from the viewpoint of the cell transmission rate management unit.

First, when the SLH 123 of the SMP 120 is started up, the SLH 123 calculates the sum of the sizes of files to be loaded for each MP as shown in FIG. 4 (S30). The sum of the sizes of the files to be loaded calculated for each MP in step S30 is calculated based on the file size information included in the PLD corresponding to and implemented for each MP.

Thereafter, the maximum cell transmission rate of each MP is calculated based on the sum of the sizes of the files to be loaded for each MP in step S30 (S32).

In the above process S32, the maximum cell transmission rate of each MP may be calculated based on Equation 1, where CR (a) denotes a cell transmission rate of MP (a), and SF (a) Denotes the sum of the sizes of the files loaded in the MP (a), and the VCR means the sum of the available cell transmission rates of the SMP 120.

As described above, after calculating the maximum cell transmission rate of each MP based on the sum of the sizes of the files to be loaded for each MP, when receiving a PLD loading request from the PLH of the newly started MP, the SLH 123 loads. Identify the MP requesting the request, and requests the cell transmission rate management unit 125 to allocate the cell transmission rate of the MP requesting the loading (S34, S36).

When the SLH 123 requests the cell transmission rate management unit 125 to allocate the cell transmission rate of the MP requested in step S36, the SLH 123 based on the maximum cell transmission rate of each MP calculated in step S32 described above. It asks to allocate the cell transmission speed of the MP that requested the loading. For example, when the SLH 123 receives a loading request from the PLH of the MP (a), and assumes that the maximum cell transmission rate of the MP (a) calculated in step S32 is 20 Mbps, the SLH 123 is The cell rate managing unit 125 requests the allocation of the cell rate of the MP (a) to 20Mbps.

After requesting the cell transmission rate allocation of the MP requesting loading to the cell rate managing unit 125 in step S36, the SLH 123 requests the cell transmission rate of the MP requesting the loading from the cell rate managing unit 125. The PLD of the MP requesting the loading is read from the disk 110 based on the assigned cell transmission rate, and transmitted to the PLH of the MP requesting the IPC loading (S38 and S40).

In step S40, the PLH loaded with the PLD from the SLH 123 generates a list of blocks to be loaded from the SLH 123 based on the PLD loaded from the SLH 123, and based on the generated loading block list. This will require files to be loaded into the SLH 123.

After the corresponding PLD is transmitted to the PLH of the MP requesting the loading in step S40, when the file is requested to be loaded from the PLH of the MP requesting the loading, the SLH 123 is loaded from the disk 110 according to the file loading request. The files are requested to be read in units of blocks of a predetermined size, and are transmitted to the PLH of the MP, which is requested to be loaded in the IPC method.

In step S44, the PLH loaded with the blocks from the SLH 123 writes the blocks loaded from the SLH 123 into a predetermined memory area and starts the loaded program when the loading of all the blocks is completed.

Subsequently, when loading of all files to the MP requesting loading is finished, the SLH 123 requests the cell transmission rate release unit 125 to release the cell transmission rate to release the cell transmission rate allocated to the corresponding MP (S46). ). The reason for releasing the cell transmission rate allocated to the MP requesting loading in step S46 is to increase the available cell transmission rate.

Subsequently, in response to a request for releasing a cell transmission rate allocated to the corresponding MP, a minimum cell transmission rate is allocated from the cell transmission rate management unit 125, and a cell transmission rate between the corresponding MP and the SLH 123 is assigned at the assigned minimum cell transmission rate. Set (S48). The reason why the minimum cell rate is allocated from the cell rate managing unit 125 according to the release request of the cell rate in step S48 may be that the MP and the SLH 123 may perform IPC for the purpose of performing different functions. This is to allow the SLH 123 to receive the loading request when the MP is restarted.

On the other hand, as shown in FIG. 5, when the cell transmission rate manager 125 is in a signal waiting state after initial startup and is requested to allocate the cell transmission rate from the SLH 123, the currently available cell transmission rate is SLH ( In step 123, it is determined whether the allocation rate is greater than the cell transmission rate (S50, S52, S54).

As a result of the determination of step S54, if the currently available cell transmission rate is larger than the cell transmission rate requested to be allocated from the SLH 123, there is no problem even if all the cell transmission rates requested to be allocated from the SLH 123 are allocated. The cell transmission rate assigned to the SLH 123 is allocated (S56).

However, if the currently available cell transmission rate is smaller than the cell transmission rate requested to be allocated from the SLH 123, the optimum cell transmission rate is calculated and allocated (S58).

In step S58, an optimal cell transmission rate may be calculated based on Equation 2, where CR (a) means a cell transmission rate of MP (a), and SF (a) is MP. Refers to the sum of the sizes of files loaded in (a), and VCR ′ refers to the sum of currently available cell transmission rates of the SMP 120.

Thereafter, the cell transmission rates of all MPs to which the current cell transmission rate is allocated are readjusted so that the loading times of all MPs are the same (S60).

In step S60, the cell rate is readjusted based on Equation 3. In Equation 3, CR (a) means the cell rate of MP (a), and SF (a) means MP (a). The total of the sizes of the files loaded in the VCR means the total of the available cell transmission speed of the SMP (120).

As described above, when the cell transmission rates of all the MPs to which the current cell transmission rate is assigned are readjusted, the total loading time (L ′) required for the actual loading is estimated in advance as shown in Equation 4. It becomes smaller than the loading time (L). The reason for this is that some MPs are already in the process of loading so that loading can be terminated earlier than MPs that require loading later, and thus the cell transfer rate that has been allocated to the MPs that have finished loading has not yet finished loading. This is because by additionally assigning to the MP, the cell transmission speed of the MP whose loading is not finished can be increased.

In Equation 4, when CR (a) 'and CR (b)' are assumed to be additionally assigned cell transmission rates to MP (a) and MP (b), MP (a) 'and MP (b) Additional assigned cell transmission rate.

Subsequently, the cell transmission rate is finally adjusted in step S60 and finally allocated to the information management table of the MP that is requested to allocate a cell transmission rate from the SLH 123 in step S52, and the SLH 123 in step S52. Record the cell transmission rate requested to be allocated and the time when the allocation is requested, and if the available cell transmission rate occurs before the request for release of the cell transmission rate of the corresponding MP occurs, the available cell transmission rate is allocated. According to the requested time point, an additional allocation is first made to the corresponding MP so as to satisfy the cell transmission rate requested by the SLH 123 in step S52 (S62).

On the other hand, if the cell rate is requested to be released from the SLH 123, the cell rate allocated to the MP is released according to the cell rate release request, and the available cell rate is increased by the released cell rate (S64). , S66, S68).

When releasing the cell transmission rate assigned to the MP in step S66, the cell transmission rate of the corresponding MP is not set to 0, the IPC other than loading with the MP is performed, and the corresponding MP is restarted. Set the cell transmission rate to the minimum value that is enough to receive the loading request from the PLH of the MP.

Thereafter, it is determined based on the information management table of the MP whether there is an MP that has not been allocated as much as the cell transmission rate is requested (S70).

As a result of the determination in step S70, if there is an MP that is not allocated as much as the cell transmission rate is requested, the cell transmission rate of the MPH is requested by the SLH 123 using the available cell transmission rate. It increases at a speed (S72).

The loading device and method of the exchanger of the present invention can be carried out in various modifications within the range allowed by the technical idea of the present invention without being limited to the above-described embodiment.

According to the loading apparatus and method of the exchange of the present invention as described above, by loading the file by varying the cell transfer rate in accordance with the size of the files loaded in each MP and the available cell transfer rate, the loading rate of the MP It will be possible to improve. In addition, by allocating an available cell transmission rate to the MP currently being loaded, ATM resources can be efficiently utilized.

Claims (8)

A disk on which PLDs (Processor Loading Data) and various files necessary for operating an exchange are stored; A system management processor coupled to the disk; In the loading device of the exchanger comprising a plurality of main processors for receiving the PLD and files from the system management processor in an IPC method, The system management processor, A system loading driver for calculating a maximum cell transfer rate of each main processor based on the size of files loaded in each main processor; And a cell transfer rate management unit for calculating and allocating a cell transfer rate between the main processor requesting loading and the system loading driver based on the sum of the currently available cell transfer rates. In the loading method of the exchanger for loading the PLD (Processor Loading Data) stored in the disk in the system management processor and various files required for operating the exchanger to a plurality of main processors, Calculating a maximum cell transmission rate for each main processor by a system loading driver provided in the system management processor; Requesting, by the system loading driver, a cell transmission rate allocation of a main processor requesting PLD loading to a cell transmission rate management unit included in the system management processor by referring to the calculated maximum cell transmission rate according to a PLD loading request; Allocating a cell transmission rate of the main processor according to the cell transmission rate allocation request by the cell transmission rate management unit; Reading, by the system loading driver, the PLD of the main processor from a disk based on the cell transmission rate allocated by the cell transmission rate management unit to a main processor in an IPC manner; Reading, by the system loading driver, the files requested for loading from the disk in units of blocks of a predetermined size according to the file loading request of the main processor, and transmitting the files to the main processor by IPC method; When the loading of all the files to the main processor is finished, requesting the cell transmission rate release from the system loading driver to release the cell transmission rate assigned to the main processor. The loading method of the exchanger. The method of claim 2, wherein the maximum cell transmission rate of each main processor, An exchanger calculated by multiplying the total of the sizes of the files loaded in the main processor by the total of the sizes of the files loaded in the main processor and the sum of the cell transfer rates available in the system management processor. Way of loading. The method of claim 2, wherein assigning the cell transmission rate comprises: Determining whether a currently available cell transmission rate is greater than a cell transmission rate requested to be allocated by the system loading driver; Allocating the requested cell rate as it is if the currently available cell rate is greater than the requested cell rate; And if the currently available cell transmission rate is smaller than the requested cell transmission rate, determining and assigning an optimal cell transmission rate. The method of claim 4, wherein the optimal cell transmission rate, Wherein the sum of the sizes of the files loaded in the main processor is divided by the sum of the sizes of the files loaded in each main processor and the sum of the cell transfer rates currently available in the system management processor is calculated. Loading method of exchanger. 5. The method of claim 4, further comprising: recalculating and allocating cell rates of all main processors to which a current cell rate is allocated when calculating and allocating the optimum cell rate; A process of recording the readjusted cell transmission rate, the requested cell transmission rate, and the time point at which the system loading driver is requested to be allocated in the table of the main processor which is requested to allocate the cell transmission rate from the system loading driver; Loading method of the exchanger further comprises. The method of claim 6, wherein the cell transmission rate to be adjusted by re-adjustment, The sum of the sizes of the files loaded in the main processor divided by the sum of the sizes of the files loaded in the main processor to which the current cell transfer rate is allocated is multiplied by the sum of the cell transfer rates available in the system management processor. A method of loading an exchanger, characterized in that it is calculated. The method of claim 2, wherein releasing the cell transmission rate comprises: Releasing a cell transmission rate allocated to a corresponding main processor according to a cell transmission rate release request, and increasing an available cell transmission rate by the released cell transmission rate; If there is a main processor that has not been allocated as many as the cell transfer rate is requested, the cell transfer rate of the main processor is increased to the cell transfer rate requested by the system loading driver by using the available cell transfer rate. Loading method of the exchanger, characterized in that made.