JP3052508B2 - Memory management method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital signal multiplexing apparatus comprising a plurality of frames, and more particularly to a memory management system for distributing and managing a device memory in each frame and making a basic control unit movable.

At this time, there is a demand for a memory management system which can simplify the memory management process.

[0003]

2. Description of the Related Art FIG. 4 is a block diagram showing a configuration of an example of a digital signal multiplexer. FIG. 5 is a block diagram showing the configuration of an example of a digital signal multiplexer having a plurality of frames.

FIG. 6 is a diagram showing a configuration of an apparatus when the basic system of one example is moved. FIG. 7 is a diagram showing memory contents in an example memory management unit. FIG. 8 is a diagram showing memory contents in a conventional memory management unit.

In FIG. 4, for example, 50 Mb / s or 150 M transmitted via a plurality of (for example, m) low-speed lines.
When an optical signal of b / s is input to the digital signal multiplexer 1, it is converted into an electric signal by a low-speed interface unit (hereinafter referred to as a low-speed IF unit) 2-1 to 2-m, and then converted into an electric signal.
In this case, m lines are multiplexed to, for example, 600 Mb / s or 2.4 Gb / s. The multiplexed signal is converted from an electric signal to an optical signal by the high-speed IF unit 4 and then transmitted to a high-speed line.

In the figure, one digital signal multiplexing apparatus comprises n systems (1) to (n) corresponding to n high speed lines (1) to (n) and their main signals ( And a monitoring control unit 5 for monitoring and controlling low-speed and high-speed digital signals) and installed on a rack. A protection line can be set for the high-speed line, and when a failure occurs in the working line, the line can be switched to the protection line.

[0007] The monitoring control unit 5 includes a terminal control unit 6, a memory management unit 7, and an alarm issuing unit 8, and manages the entire rack. The terminal control unit 6 sets the operation state in the device and switches the line from the working to the standby under the control of the external control / monitoring unit 9. The memory management unit 7 stores and manages the operation state in the apparatus at the time of system construction and at the time of emergency startup. Further, the alarm issuing unit 8 monitors a failure that has occurred in the device and notifies the external control / monitoring unit 9 as an alarm.

Next, when a system having a capacity larger than that of the above-described digital signal multiplexing apparatus 1 is configured, the size of the rack is regulated, so that it is impossible to configure the apparatus with one rack. Therefore, a system in which one device is constituted by a plurality of frames as shown in FIG. 5 can be considered. In this case, one high-speed line constitutes one line, and when n high-speed lines are required, one device is constituted by n units. FIG. 5 shows a case where one device is constituted by two frames.

In FIG. 5, connection with the external control / monitoring unit 9 is made through a frame having a basic control unit 6-1. This frame is a main frame for external control and is defined as a basic frame.
And other frames (in this case, frames with system (2))
Is defined as a subordinate frame.

The control of the operation state in the basic frame is performed by the basic control unit 6-
The control in the subordinate frame (here, the system (2)) is performed by the subordinate control unit 6-2 through the inter-chamber communication control line. However, the system in the basic frame (1) and the system in the subordinate frame (2)
Control of the high-speed IF units 4-1 and 4-2 of the basic control unit 6-1
Do intensively.

FIG. 7 shows the memory contents of the memory management units 7-1 and 7-2. The operation state of the high-speed IF units 4-1 and 4-2 is controlled by the basic frame, so only the basic frame is configured in the initial state.
The operation state of the low-speed IF units 2-1 to 2-m is distributed management of each rack.

Here, in a digital signal multiplexing apparatus having a plurality of frames, a system may be added / removed depending on the use of a user. FIG. 6 shows an example of removing the system. FIG. 6A shows the configuration of the device when the system (1) is a basic system.
When removing (1), remove the package that mounts the basic control unit 6-1 from the rack that mounts system (1), and install it on the subordinate rack that mounts system (2) (Fig. 6 (B)). ). In this case, since the power is turned on, the applicable system
(1) The system (2) is protected. After that, the system (1) is removed.

At this time, the frame on which the new system (2) is installed is the basic frame. The memory management unit 7-2 of the newly-configured frame has the high-speed IF unit 4-1, Since there is no central management data such as the operation state of 4-2, the memory needs to be rewritten.

Conventionally, as shown in FIG. 8, in a memory management section of a subordinate frame, centralized management data used only by the basic frame is transferred as necessary in addition to the distributed management data uniquely owned by each frame. It was stored and the memory management state was always the same as the basic frame.

[0015]

However, in the conventional memory management system described above, every time it becomes necessary to operate the centralized management data on the basic frame, the information is transferred to each subordinate frame. Become complicated,
In addition, there is a problem that a transfer time is required for this.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a memory management system in which a memory management process is simple.

[0017]

The above problem is solved by the structure of the apparatus shown in FIG. That is, in FIG.
A package comprising a basic frame and one or a plurality of subordinate frames connected to the basic frame by control signal lines, and the basic frame includes a basic control unit 600 for centrally managing the subordinate frames; Storage unit 700 for storing data for centralized management
And a storage unit 710 in the subordinate frame.
In a transmission device having a package equipped with a basic control unit 600, when the package equipped with the basic control unit 600 is moved from the basic frame to a predetermined subordinate frame and set, the data stored in the storage unit 700 of the basic frame for centralized management is used. And a data transfer control unit 10 for outputting a control signal for reading and writing the data to a storage unit 710 mounted on a package of a predetermined subordinate frame.
0 is provided in the basic control unit 600.

When the package on which the basic control unit 600 is mounted is moved to a predetermined sub-frame and set, the data for centralized management stored in the storage unit 700 of the basic frame is read out and the predetermined sub-frame is read. Storage unit 71 to be mounted on a package
0 is stored in the memory, and a predetermined sub-frame is set as a new basic frame.

[0019]

In FIG. 1, when it becomes necessary to move the package on which the basic control unit 600 is mounted from the basic rack to a predetermined subordinate frame and set it, remove the package on which the basic control unit 600 is mounted from the basic rack and perform the predetermined operation. Installed on a subordinate frame. Then, the power of the data transfer control unit 100 provided in the basic control unit 600 is turned on and operation starts, and the storage unit of the original basic rack is started.
The data for centralized management stored in the storage unit 700 is read out and stored in the storage unit 71 mounted on the package of the predetermined subordinate frame.
Write to 0 and store. And this basic control unit 600
A predetermined sub-frame on which a package on which is mounted is newly set is set as a new basic frame.

As a result, memory management can be simplified by transferring data for centralized management, which is managed by the basic frame only when the basic control unit moves, to the new basic frame.

In addition, since it is not necessary to transfer data for centralized management managed by the basic frame to another subordinate frame except when the basic frame is moved, the access time for various controls is reduced. Can be.

[0022]

FIG. 2 is a block diagram (part 1) showing the configuration of a digital signal multiplexer according to an embodiment of the present invention.

FIG. 3 is a block diagram (part 2) showing the configuration of the digital signal multiplexer according to the embodiment of the present invention. The same reference numerals indicate the same objects throughout the drawings.

FIG. 2 shows a state before the basic control unit 6-1 is moved, and FIG. 3 shows a state immediately after the movement. In FIG. 2, the basic frame has a basic control unit 6-1 having an interface with the external control unit 9 ', and controls an operation state in the basic frame. In the memory management unit 7-1 of the basic frame, the centralized management data (only high-speed I /
The operation status of the F section and the like and the distributed management data (the operation status of the low-speed section and the like) that each frame has independently are stored.

The subordinate frame has a subordinate control section 6-2 having an interface function with the basic frame, and performs transmission / reception of information with the basic frame and control of an operation state in the subordinate frame. The memory management unit 7-2 of the subordinate rack stores distributed management data that each rack has independently.

Now, when it becomes necessary to move the basic control unit 6-1 installed on the basic frame from the basic frame to the subordinate frame and install it, the centralized control data by the basic frame is the state at the time when the new basic frame was moved. Is transferred from the old basic frame to the new basic frame.
Specifically, (1) The package of the basic control unit 6-1 is extracted from the old basic frame and installed on the subordinate frame which becomes the new basic frame (see FIG. 3).

(2) Then, the moving and installed basic control unit
The power of the read-only memory (hereinafter referred to as ROM) 10 provided in 6-1 is turned on and the operation starts, and the memory management unit 7-1 of the old basic frame is selected from a plurality of subordinate frames (not shown).
Search for and find. Then, the centralized management data is read from the memory management unit 7-1 of the old basic frame, and is transferred to the memory management unit 7-2 via the basic control unit 6-1 of the new basic frame and stored.

In this case, the identification of whether or not the frame is the old basic frame is performed by checking whether or not data unique to the basic frame is stored in the memory management unit 7-1. As a result, memory management can be simplified by transferring central management data managed by the basic frame to the new basic frame only when the basic control unit moves.

Further, since it is not necessary to transfer the centralized management data managed by the basic frame to another subordinate frame except when the basic frame is moved, the access time for various controls can be reduced.

Next, as a second embodiment, a basic control unit and a subordinate control unit are both provided on the basic frame and each subordinate frame in advance, and a switch (not shown) serving as a trigger for moving the basic control unit is provided. Provided on the front of each rack.

When it is desired to move and install the basic control section installed on the basic rack to a predetermined subordinate frame, first, a switch (not shown) provided on the front surface of the predetermined subordinate frame is turned on from off to on. The basic control unit provided in the subordinate rack operates in advance, reads out the centralized management data stored in the memory management unit of the old basic rack, and transfers and stores the centralized management data to the memory management unit of the predetermined subordinate frame. Then, the switch related to the basic control unit of the old basic frame is turned off.

In this manner, the same effects as those of the first embodiment can be obtained. As a third embodiment, similarly to the above-described second embodiment, both the basic control unit and the subordinate control unit are provided in advance in the basic frame and each subordinate frame. And, when it is desired to move and install the basic control unit of the basic rack to a predetermined subordinate frame, control information for moving and installing the basic control unit from the external control unit together with a number for identifying the basic frame and the predetermined subordinate frame, Output to the basic control unit of the basic frame and the subordinate control units of each subordinate frame.

The basic control unit of the basic frame and the subordinate control units of each subordinate frame receive the control information and the identification number and check whether or not the identification number matches the number of the own frame. When they do not match, this signal is ignored, but when they match, in a predetermined subordinate frame that is installed by moving the basic control unit from the basic rack, the basic control unit provided in advance in this predetermined subordinate frame is In operation, the centralized management data stored in the memory management unit of the original basic frame is read, and transferred to and stored in the memory management unit of the predetermined subordinate frame. Then, a predetermined subordinate frame on which the basic control unit has started operation is set as a new basic frame.

In this manner, the same effects as those of the first embodiment can be obtained.

[0035]

As described above, according to the present invention, the memory management is simplified by transferring the central management data managed by the basic frame to the new basic frame only when the basic control unit moves. Can be.

In addition, since it is not necessary to transfer the centralized management data managed by the basic frame to another subordinate frame except when the basic frame is moved, the access time for various controls can be reduced.

[Brief description of the drawings]

FIG. 1 is a principle diagram of the present invention,

FIG. 2 is a block diagram (part 1) showing a configuration of a digital signal multiplexer according to an embodiment of the present invention;

FIG. 3 is a block diagram (part 2) showing a configuration of a digital signal multiplexer according to an embodiment of the present invention;

FIG. 4 is a block diagram showing a configuration of an example digital signal multiplexer.

FIG. 5 is a block diagram showing an example of a configuration of a digital signal multiplexer having a plurality of frames.

FIG. 6 is a diagram showing a configuration of a device when the basic system of one example is moved,

FIG. 7 is a diagram showing memory contents in an example of a memory management unit;

FIG. 8 is a diagram showing memory contents in a conventional memory management unit.

[Explanation of symbols]

100 is the data transfer control unit, 600 is the basic control unit, 700 and 71
0 indicates a storage unit.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H04J 3/00-3/26 H04M 3/00 H04L 12/50

Claims (1)

(57) [Claims] 1. A basic control system comprising one basic frame and one or more subordinate frames connected to the basic frame by a control signal line, wherein the basic frame performs centralized management for the subordinate frames. Department (60
0) and a package having a storage section (700) for storing data for performing the centralized management, and the subordinate frame has a package having a storage section (710). In the apparatus, when a package mounting the basic control unit (600) is moved from the basic rack to a predetermined subordinate frame and set, data for centralized management stored in the storage unit (700) of the basic rack is used. And read out the storage unit to be mounted on the package of the predetermined subordinate frame.
A data transfer control unit (100) for outputting a control signal for writing and storing the data in (710) is provided in the basic control unit (600), and a package mounting the basic control unit (600) is mounted on the predetermined subordinate frame. When setting, the data for centralized management stored in the storage unit (700) of the basic rack is read out, written and stored in the storage unit (710) mounted on the package of the predetermined subordinate rack. A predetermined subordinate frame is set as a new basic frame.