KR20030077698A - Method for loading of Application Program in main processor of mobile switching controller of mobile communication system - Google Patents

Abstract

PURPOSE: A method for loading an application program in an MP(Main Processor) of an MSC(Mobile Switching Center) of a mobile communication system is provided to improve a loading speed and solve an IPC(Inter Processor Communication) traffic problem by copying the application program to a DRAM(Dynamic RAM) in an active-side MP booter when a standby-side MP booter requests a dual copy to the active-side MP booter and copy the application program to an SRAM(Static RAM) in the standby-side MP booter. CONSTITUTION: An active-side MP booter receives an application program from an OMP(Operation and Maintenance Processor) through an IPC(ST11). The active-side MP booter executes the received application program(ST12). The active-side MP booter checks whether an standby-side MP booter requests information about the location and size of SRAM copy information(ST13). If the standby-side MP booter requests information about the location and size of SRAM copy information, the active-side MP booter transmits SRAM copy information to the standby-side MP booter(ST14). The active-side MP booter copies SRAM copy information in a DRAM of an active-side MP, and the standby-side MP booter copies SRAM copy information in a DRAM of a standby-side MP(ST15). The active-side MP booter checks whether the copy process is completed(ST16). If the copy process is completed, the active-side MP booter transmits a download completion signal to the standby-side MP booter(ST17). The standby-side MP booter receives the download completion signal, and copies SRAM copy information to an original SRAM region(ST18). The standby-side MP booter jumps to an application program start address in copied SRAM copy information and executes the application program(ST19).

Description

Method for loading of Application Program in main processor of mobile switching controller of mobile communication system}

The present invention relates to a method for loading an application program in a main processor of a mobile communication exchange, and more particularly, when an application program is loaded from a standby main processor among the redundant main processors in the mobile communication exchange, When requesting dual copy from the standby main processor to the active main processor, the application program (OS / DBKG / PL / PLD) is copied to the DRAM from the active main processor. In addition, by copying back to SRAM from the standby main processor, the application program can be loaded in the form of Memory Copy without IPC (Inter Process Communication), thereby improving the loading speed and IPC traffic problems. To improve the From the processor it relates to the application program loading method.

1 is a block diagram illustrating a processor structure of a general mobile communication system switch.

As shown therein, a processor of a mobile communication exchange is divided into a main processor (MP) and a subprocessor (PP), and each of these processors serves as a backbone for inter process communication (IPC) communication of the entire exchange. It is connected to a high performance central inter processor communication unit (HCIPCU) 45 in charge.

Here, since the PLD (Processor Load Data) is loaded into the memory of the main processor, the present invention and the general technology will be described with respect to the main processor.

On the other hand, the main processor of the mobile communication switch is OMP (Operation and Maintenance Processor) (5), MMP (Man Machine Communication Processor) (Man Machine Processor) (10), NTP (Number Translation Processor) (15), INP (Interconnection Network Processor) 20), a location register processor (LRP) 25, and a plurality of access switching processors (ASPs) 30 and 35.

Here, the OMP 5 performs maintenance, network management, billing, statistics, and database management throughout the mobile communication switch. Next, the MMP 10 performs input / output control between an operator and a mobile communication exchange, and the NTP 15 performs a number translation and routing function control.

Next, the INP 20 performs a control function for detecting, restoring, and processing a failure in an internal communication path of a mobile communication exchange, and the LRP 25 performs a control function for managing visited location information of a mobile subscriber. Perform.

Next, each of the ASPs 30 and 35 performs control functions for call flow control, statistical measurement, collection and reporting, billing measurement and reporting.

FIG. 2 is a diagram schematically illustrating a memory structure of a general mobile communication switch main processor, and FIG. 3 is a diagram illustrating a region allocation structure of a memory in a typical mobile communication switch main processor.

As shown therein, the memory of the main processor (MP) of the mobile communication switch is divided into EPROMs 110 and 210, local SRAMs 120 and 220 for the program. DRAM 130, 230. Here, the DRAMs 130 and 230 are designed in a redundant structure, and the CPUs 130 and 240 of the first main processor 100 and the second main processor 200 each other and their respective DRAMs 130 ( 230, read / write is possible.

Meanwhile, since the SRAMs 120 and 220 are faster than the DRAMs 130 and 230, an operating system (hereinafter abbreviated as 'OS') and a DBKG (Data Base Kernal Group, DBMS of a mobile communication exchange) are provided. (Application code of Data Base Management System), PL (Processor Loader), PLD (Processor Load Data), etc., are assigned to application programs and include local information. In addition, since the SRAMs 120 and 220 are not redundant, each of the SRAMs 120 and 220 may be read / write only within their own main processor 100 and 200 boards.

On the other hand, as shown in Figure 3, from the main processor (Booter) to load the application program, such as the OS and run normally, the OS text (Text), PL, DBKG in the SRAM (120) 220 region Text is allocated and OS data (Data), DBKG data, and PLD (Processor Load Data) should be allocated in the DRAM 130 and 230 regions.

In other words, in the accompanying drawings, in the case of the active main processor (first main processor) 100, the application program information described above is loaded from the OMP 5 through IPC (Inter Process Communication). .

Therefore, in the case of the main processor configured as the duplication of the mobile switching system, the two main processors 100 and 200 are respectively loaded by the OMP 5 or the hard disk (not shown) through the IPC. There was a problem of slowing down speed and increasing IPC traffic.

In addition, the PCS (Personal Communication System) system has been improved by receiving the dual copy (Dual Copy) method using DRAM, but improved in the case of ACX-2000 system, because the OS is running in the local SRAM area, dual copy There is a problem in that the method must be loaded through IPC without applying the method.

Here, the dual copy refers to a series of copying processes in which one processor simultaneously writes itself and the other processor memory in a duplex structure of a mobile communication exchange.

Accordingly, the present invention is proposed to solve the above problems of the prior art,

An object of the present invention is to dual copy from the standby main main processor of the mobile communication exchange to the active main main processor when the application program is loaded from the standby main main processor of the redundant main processor in the mobile communication exchange (Dual Copy) Copy the application program (OS / DBKG / PL / PLD) from the active main processor to the DRAM with redundancy, and also from the standby main processor back to the SRAM to improve loading speed and IPC traffic problems. The present invention provides a method for loading an application program in a main processor of a mobile communication system switch that can be improved.

The present invention for achieving the above object,

From the active side main processor (IPC) through the Inter Process Communication (OPC) from the Operation and Maintenance Processor (OMP) to the application program (OS (Operating System), DBKG (Data Base Kernal Group), PL (Processor Loader) Loading a processor load data (PLD),

Executing the downloaded application program and checking whether there is a request for information on the location and size of the SRAM to be copied from a standby side main processor;

Transmitting the SRAM copy information from the active side to the standby side when there is a request from the standby main processor, as a result of the check;

After copying the SRAM copy information, copying the SRAM into DRAMs of an active main processor and a standby main processor, respectively;

Checking whether the copying process is completed after the SRAM copying, and when the copying is completed, transmitting a download completion signal from the active side to the standby side;

The method further comprises copying the copied SRAM to the original SRAM area from the standby side receiving the signal, and jumping to the application program start address in the copied SRAM to execute the application program. It is done.

1 is a block diagram showing a processor structure of a general mobile communication system switch,

2 is a diagram schematically illustrating a memory structure of a general mobile communication switch main processor;

3 is a diagram schematically illustrating a region allocation structure of a memory in a general mobile communication switch main processor;

4 is a diagram illustrating a memory copy process of a mobile communication switch main processor according to the present invention;

5 is a flowchart illustrating an application program loading method in a mobile communication switch main processor according to the present invention;

6 is a flowchart illustrating an application program loading process in a mobile communication switch main processor according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100, 200 ..... 1st and 2nd main processor (MP)

110, 210 ..... erasable and programmable read only memory (EPROM)

120, 220 ..... Static Random Access Memory (SRAM)

130, 230 ..... Dynamic Random Access Memory (DRAM)

140, 240 ..... Centra Processing Unit

Hereinafter, a preferred embodiment of the "application program loading method in a main processor of a mobile communication system exchange" of the present invention according to the above technical concept will be described in detail with reference to the accompanying drawings.

4 is a diagram illustrating a memory copying process of the main processor of the mobile communication switch according to the present invention.

First, in case of two redundant processors, all the information is the same, so when the application program (OS / DBKG / PL / PLD) is loaded from the standby side main processor, it is loaded through IPC (Inter Process Communication). Even if it is not received, the same result can be obtained if the main processor information of the loaded active side can be copied first. Therefore, it is possible to improve the overall loading speed of the mobile switching center by performing a fast memory copy process without having to spend a lot of IPC traffic and time to import application program data such as PLD of several M bytes through IPC. It is brought.

That is, as shown in FIG. 4, when power is supplied to the first and second main processors 100 and 200, a program is executed from the EPROM 110 to check hardware. The OS will be loaded. At this time, the first step (Booter) is recognized as Active (Active). The main processor (first processor) 100 from the active side (Booter) is a series of running an OS after receiving an application program such as OS / DBKG / PL / PLD from OMP (Operation and Maintenance Processor) through IPC. Will execute the loading process.

On the other hand, the standby main processor (second main processor) 200 (Booter) performed later waits until the active main processor 100 is running after the OS load. In the conventional loading method, both the active and standby sides separately load OS / DBKG / PL / PLD via IPC and then execute the OS.

That is, the main processor 200 on the standby side continuously checks the active side 100 (transmit the ARE_YOU_READY signal), and waits for the active side to finish loading from the OMP (transmit the I_AM_READY signal).

In other words, after the OS is executed in the active main processor 100 from the standby main processor 200 and receives the loading completion signal I_AM_READY from the active main processor 100, the SRAM 120 copies. The main processor 100 on the active side is requested to be located and sized. At this time, the OS of the active main processor 100 informs the SRAM 120 copy information from the main processor 200 of the standby side, and then copies the SRAM 120 to both DRAMs 130 and 230. As described above, the SRAM_1 125 and the DRAM area 135 copied to both sides exactly match the contents of OS / DBKG / PL / PLD loaded by the active main processor 100 to the IPC.

On the other hand, after the above-described copying process is completed, the main processor 100 OS on the active side transmits a download completion signal (DLOAD_END) from the main processor 200 on the standby side.

Meanwhile, from the standby main processor 200 receiving the download completion signal, the SRAM_1 125 is copied to the SRAM_2 250 and then jumped to an OS (application program) start address in the SRAM_2 250. (Jump) will run the application program like OS normally. This completes the loading process.

5 is a flowchart illustrating an application program loading method in a mobile communication switch main processor according to the present invention.

As shown in the drawing, the step of loading an application program from the OMP via the IPC from the active main processor (ST11), the step of executing the downloaded application program (ST12), and after executing the application program, standby Checking whether there is a request for information on the location and size of the SRAM to be copied from the main processor (S13); (S14), and after the SRAM copy information is transmitted, copying the SRAM to the DRAMs of the active main processor and the standby main processor (ST15), and checking whether the copy process is completed after copying the SRAM. (ST16), and when copying is completed, the download completion (DLOAD_END) signal is transmitted from the active side to the standby side. (ST17), copying the copied SRAM from the standby side receiving the signal to the original SRAM area (ST18), jumping to the application program start address in the copied SRAM to the application program It executes step ST19.

6 is a flowchart illustrating an application program loading process in a mobile communication switch main processor according to the present invention.

As shown in FIG. 2, when an operating system (OS) is executed in the OMP 300, an active main processor 100 requests loading from the OMP 300 (S11) and the request from the OMP 300. When the response is received, the OS / PLD / PD / DBKG is downloaded (S12), and then the OS is executed.

On the other hand, from the standby side main processor 200, when the OS is running in the active side main processor 100, it is checked whether the active side main processor is ready (transmit Are_You_Ready signal) (S13), and the active side main processor ( When the I_Am_Ready signal is received from S100 (S14), the SRAM offset is requested from the active main processor 100 (SRAM_Offset_Request) (S15).

When a response (SRAM_Offset) according to the SRAM offset request is received (S16), the SRAM size request (SRAM_Size_Request) (S17) from the active main processor 100 (SRAM_Size), when receiving (S18), the standby side Informs the start of the main processor (B_STANDBY_START) (S19), and downloads the SRAM of the active main processor (S20).

At this time, OS text / PL / DBKG text copy is made from the local SRAM (active side) to the dual DRAM, and OS data / DBKG data / PLD copy is made from the active DRAM to the dual DRAM.

On the other hand, when the series of copying process is completed, the download from the standby main processor is terminated (S21), copying the OS text / PL / DBKG text from the dual DRAM to the local SRAM area, thereby improving the loading speed and IPC It can improve the traffic problem.

According to the above-described "method of loading an application program in the main processor of the mobile communication system exchange" described above, if a dual copy is requested from the standby main processor to the active main processor of the mobile communication exchange, By copying the application program (OS / DBKG / PL / PLD) in redundancy from the main processor to the DRAM and back to SRAM from the standby main processor, all of the mobile switching centers can When the main processor is loaded at the same time, the required IPC data is reduced in half, thereby reducing the loading speed and also having the advantage of improving the IPC traffic problem through the above process.

In addition, in the case of OMP, it is possible to reduce the work of having to read the hard disk twice in order to load once, thereby reducing the disk-related work that requires a lot of time.

Claims (3)

A method of loading an application program in a redundant main processor including a static random access memory (SRAM) and a dynamic random access memory (DRAM) in a mobile communication system switch, From the active side main processor (IPC) through the Inter Process Communication (OPC) from the Operation and Maintenance Processor (OMP) to the application program (OS (Operating System), DBKG (Data Base Kernal Group), PL (Processor Loader) A first process of loading a processor load data (PLD); A second step of executing the downloaded application program and checking whether there is a request for information on a location and a size to which the SRAM is to be copied from a standby side main processor; A third step of transmitting SRAM copy information from the active side to the standby side in response to a request from the standby main processor; A fourth step of copying the SRAM to DRAMs of an active main processor and a standby main processor after transmitting the SRAM copy information; A fifth step of checking whether the copying process is completed after the SRAM copying, and when a copying is completed, transmitting a download completion signal from the active side to the standby side; And a sixth step of copying the copied SRAM to an original SRAM area from the standby side receiving the signal, and jumping to an application program start address in the copied SRAM to execute the application program. Application program loading method in the main processor of the mobile communication system switch. The method of claim 1, wherein the second process comprises: When an application program is executed in the active main processor, the standby main processor checks whether the active main processor is ready (transmitting an Are_You_Ready signal), and as a result of the checking, from the active main processor When receiving the ready signal (I_Am_Ready), the step of requesting the SRAM information from the active main processor, and receiving the SRAM information according to the request, if the standby side informs the start (B_STANDBY_START) from the main processor, the active side A method of loading an application program in a main processor of a mobile communication system switch comprising the step of downloading the SRAM of the main processor. The method of claim 2, wherein the requesting the SRAM information comprises: Requesting an SRAM offset from the active main processor (SRAM_Offset_Request); if a response (SRAM_Offset) is received according to the SRAM offset request, requesting an SRAM size from the active main processor (SRAM_Size_Request); and And receiving the SRAM size information (SRAM_Size) according to the request.