KR100737041B1 - Ip-based multi-shelf system - Google Patents

Abstract

The present invention relates to an IP-based multi-shelf system, comprising: a first network connection unit for receiving a signal from an external network and providing the signal to a processing circuit; A second network connection unit for transmitting a signal received from the network to another shelf side; A relay configured to maintain a connection between the network and the first network connection unit in a normal state, and to switch the network to be connected to a second network connection unit when a failure occurs; And a connection control unit for transmitting physical address information of the first network connection unit to the network when the first network connection unit is detected as newly connected to the network. In this case, when an IP-provided master shelf fails, the signal received from the network is input to the slave shelf through the second network connection of the master shelf and the slave shelf is converted into the master shelf. It ensures continuity of communication even in the event of a failure, so that the system can be managed and controlled in the network management center without loss of service.

Description

IP-based multi shelf system {IP-BASED MULTI-SHELF SYSTEM}

1 is a control block diagram of a conventional multiple IP-based multiplexing system,

2 is a control block diagram of a conventional single IP-based multiplexing system,

3 and 4 are control block diagrams showing an operating state when a failure occurs in an IP-based multiplexing system according to the present invention.

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

10: Network Management Center 20: WDM-PON Shelf

22: first network connection 24: second network connection

26: processing circuit 28: IPC interface

30: relay 32: connection control unit

The present invention relates to an IP-based multi-shelf system, and more particularly, to an IP resource in a multi-self structure that constitutes a Wavelength Division Multiplexing-Passive Optical Network (hereinafter, referred to as WDM-PON) system. The present invention relates to an IP-based multi-shelf system that can save the cost and ensure system reliability even in the event of an IP-assigned master shelf failure.

The WDM-PON system consists of a multi-shelf structure that accommodates four to eight main shelves in a rack.

1 is a control block diagram showing the configuration of a conventional WDM-PON system. As shown in Fig. 1, the conventional WDM-PON system uses each shelf 3-1 .. through LAN, which is the network connection section 4-1 .... 4-N at the network management center 1 side. .3-N) to manage subscribers. Therefore, since IP must be allocated to each shelf (3-1 ... 3-N), IP resources are needed as many as the shelves (3-1 ... 3-N).

2 illustrates a configuration of a conventional WDM-PON system for controlling multiple shelves through one IP. As shown in FIG. 2, when controlling multiple shelves 7-1 to 7 -N through one IP, only the master shelf 7-1 is connected to a LAN, which is a network connection, and the network management center 6. Is connected only to the master shelf 7-1. Accordingly, the master shelf 7-1 communicates with the slave shelves 7-2 to 7 -N and the inter-processor communication (IPC) interface 9-under the control of the network management center 6. It is interconnected via 1 ... 9-N) to control the slave shelf (7-2 ... 7-N). In this structure, when a master cell 7-1 to which a LAN (network connection part) is connected fails or requires maintenance, control of each slave shelf (7-2 ... 7-N) connected to it is impossible. Disruption occurs when providing services to subscribers.

As described above, the conventional WDM-PON system has to allocate IP resources as many as the number of shelves, or, in the case of operating with one IP, a service loss occurs when a master shelf fails.

The present invention has been made to solve the above-described problems, IP resources in a multiple self structure that constitutes a Wavelength Division Multiplexing-Passive Optical Network (WDM-PON) system The purpose is to provide an IP-based multi-shelf system that can save cost and guarantee system reliability even in the event of an IP-assigned master shelf failure.

According to an aspect of the present invention, there is provided an IP-based multi-shelf system, including: a first network connection unit for receiving a signal from an external network and providing the signal to a processing circuit; A second network connection unit for transmitting a signal received from the network to another shelf side; A relay configured to maintain a connection between the network and the first network connection unit in a normal state, and to switch the network to be connected to a second network connection unit when a failure occurs; And a connection control unit for transmitting physical address information of the first network connection unit to the network when the first network connection unit is detected as newly connected to the network.

Here, when it is detected that the first network connection unit newly connects with the network, it may further include an IPC (Inter-Processor Communication) interface for transmitting master shelf information to the other shelf side.

The access control unit broadcasts ARP (Address Resolution Protocol) information including a MAC address (Media Access Control Address) of the first network access unit to the network when it detects a new network connection of the first network access unit. It is possible.

Hereinafter, an IP based multiple shelf system according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 and 4 are control block diagrams of an IP-based multiplexing system according to the present invention, illustrating an operation process when a failure occurs, and in particular, a Wavelength Division Multiplexing-Passive Optical Network (WDM) It is an example of configuring a system.

As shown in FIG. 3, the WDM-PON system according to the present invention has a master shelf 20-1 connected to a network management center 10, and inter-processor communication with the master shelf 20-1. Communication (hereinafter referred to as IPC) consists of a plurality of slave shelves (20-2 ... 20-N) connected through the interfaces (28-1, 28-2 ... 28-N) through a single IP It is connected with the network management center 10.

Here, each of the shelves 20-1, 20-1, and 20 -N receives a signal from an external network and receives a signal from an external network and a first network connection unit 22 that provides a signal to the processing circuit 26. The second network connection part 24 which bypasses and delivers to the other shelf side is interposed between the external network and both network connection parts 22 and 24, and maintains the connection state between the external network and the first network connection part 22 when it is in a normal state. In addition, when a failure occurs in the shelf, the external network is connected to the second network connection unit 24 and the switching operation 30, and when the external network connection is detected through the first network connection unit 22 ARP (Address Resolution) Protocol control unit 32 for transmitting information to the external network.

As the network connection units 22 and 24, a LAN for transmitting and receiving a signal may be applied to the network connection unit 22 and 24. In the WDM-PON shelf according to the present invention, two network connection units 22 and 24 are provided in one shelf. Has a structure. Here, the first network connection unit 22 transmits a signal transmitted from the network management center 10 through the network to a corresponding processing circuit. The second network connection unit 24 transmits a signal transmitted by the network management center 10 to the first network connection unit 22 provided in another shelf.

The relay 30 is interposed between the external network and both network connections 22 and 24 so that any one of the first network connection 22 and the second network connection 24 is connected to the external network. Here, when both the first network connection unit 22 and the processing circuit maintain a normal state, the relay 30 connects the network and the first network connection unit 22 to transmit a signal transmitted from the network management center 10. 1 is transmitted to the processing circuit through the network connection (22). On the other hand, when the connection between the first network connection unit 22 and the network is disconnected or a failure occurs in the processing circuit, the relay 30 switches so that the second network connection unit 24 is connected to the external network. Accordingly, the signal transmitted from the external network is input to the second network connection part 24 and transmitted to the first network connection part 22 provided in another shelf. Such a relay may be implemented in the form of a switch in which a connection state is switched according to a physical detachment state of a processing circuit, or an electronic relay switched in response to a failure signal generation.

The shelf directly connected to the network management center 10 through the first network connection unit 22 operates as the master shelf 20-1 to receive signals, and the slave shelf 20-2 ... 20 through the IPC interface. -N) to provide a signal from the network management center (10).

Here, when a failure occurs in the master shelf 20-1, as shown in FIG. 4, the relay 30-1 of the master shelf 20-1 is transferred to the second network connection part 24-1 and is removed. The two network connection part 24-1 and the first network connection part 22-2 of the first slave shelf 20-2 are connected. The connection control unit 32-2 of the first slave shelf 20-2 monitors the network connection (LINK_UP) and disconnection (LINK_DOWN) states of the first network connection unit 22-2 to monitor the first network connection unit 22-2. When the network connection is confirmed, the ARP (Address Resolution Protocol) information is broadcast to the network to notify that the MAC address (Media Access Control Address) has been changed. In addition, the first slave shelf 20-2 notifies that the master shelf has been changed through the other slave shelf 20-N side and the IPC interface 28-2.

Accordingly, the signal transmitted from the network management center 10 is transmitted through the second network connection part 24-1 of the master shelf 20-1 to the first network connection part 22-of the first slave shelf 20-2. 2) is received and input to the processing circuit 26-2 mounted on the first slave shelf 20-2, and the first slave shelf 20-2 operates as a new master shelf to operate the network management center 10. Continuous communication with the side is possible.

As described above, the present invention is connected to the master shelf 20-1 connected to the network management center 10 and the master shelf 20-1 by inter-processor communication (hereinafter referred to as IPC). In a multi-shelf system composed of a plurality of slave shells and managed through one IP, a first network connection unit for receiving a signal from an external network and providing the signal to a corresponding processing circuit, and a system for transmitting a signal from the external network back to the outside It is provided with a relay which operates two network connection parts and which one of both network connection parts selectively connects with a network according to whether a shelf is interrupted.

Therefore, in case of failure of the master shelf to which the IP is assigned, the relay of the master shelf is switched to the second network connection part and a signal received from the network is transmitted to the first slave shelf through the second network connection part of the master shelf 20-1. The connection control unit of the first slave shelf which is inputted to the first network connection unit and detects the network connection of the first network connection unit notifies the network management center of the change of the MAC address so that the slave shelf operates as the master shelf.

Therefore, the network management center can continuously communicate with the WDM-PON system with the same IP information, and the slave shelf connected to the network communicates with other slave shelves through the IPC interface to operate as a new master shelf. You can manage and control the system at.

As described above, the embodiment according to the present invention is not limited to the above, and various modifications can be made within the scope apparent to those skilled in the art in connection with the present invention.

As described above, the IP-based multi-shelf system according to the present invention includes a first network connection unit for receiving a signal from an external network for each shelf and providing the signal to a corresponding processing circuit, and a signal for transmitting a signal from the external network to another shelf side. (2) A network connection unit is provided and a relay is operable to selectively connect either of the network connection units on both sides, so that in case of failure of an IP-protected master shelf, a signal received from the network is transmitted to the second network connection unit of the master shelf. The slave shelf is operated as a master shelf by being input to the first network connection portion of the slave shelf.

Accordingly, it is possible to continuously communicate with the WDM-PON system with the same IP information, and the slave shelf connected to the network communicates with other slave shelves through the IPC interface to operate as a new master shelf. Can be managed and controlled

Claims (3)

An IP-based multi-shelf system with multiple shelves, Each of the plurality of shelves, A first network connection unit for receiving a signal from an external network and providing the signal to a processing circuit; A second network connection unit for transmitting a signal from the external network to another shelf side; A relay configured to maintain a connection between the external network and the first network connection unit in a normal state and to switch the external network to be connected to a second network connection unit when a failure occurs; And a connection controller for transmitting the physical address information of the first network access unit to the external network when the first network access unit is detected as newly connected to the external network. The method of claim 1, When the first network connection unit is detected that the new connection with the external network, the IP-based multi-shelf system, characterized in that it further comprises an Inter-Processor Communication (IPC) interface for transmitting the master shelf information to the other shelf side . The method of claim 1, The access control unit broadcasts ARP (Address Resolution Protocol) information including the MAC address (Media Access Control Address) of the first network access unit to the external network when it detects a new network connection of the first network access unit. Features an IP-based multishelf system.

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