KR20050051332A - Apparatus for switch including network synchronous function in gateway device - Google Patents

Abstract

The present invention provides a switch device including a network synchronizer function in a gateway device, which receives a clock source synchronized with a digital network from an interface device or receives a reference clock through DOTS and outputs one of them as a reference clock. A reference receiver; A clock synchronizing unit which receives the reference clock output from the reference receiving unit, generates a clock synchronized by the control from the control unit, and transmits state information to the control unit; A clock distributor which receives the clock generated by the clock synchronizer and generates and outputs a reference pulse signal of the data stream and a synchronized clock; An upper matching unit performing an interface with an upper main processor so that call connection information of the system and state control and management of the network unit and the switch unit are performed by the upper main processor; A control unit which receives information from an upper main processor through the upper matching unit and controls the clock synchronization unit and the switch unit; And a switch unit configured to receive a reference pulse signal and a synchronous clock signal of a data stream from the clock distributor and to exchange time slots of serial data coming from an input highway under the control of the controller. Instead of configuring the synchronous device and the switch device, both the synchronizer function and the switch function can be performed on one card.

Description

Apparatus for switch including network synchronous function in gateway device

The present invention relates to a switch device including a synchronizer function in a gateway device, and more particularly, to provide a switch device suitable for performing both a synchronizer function and a switch function in one card without separately configuring the synchronizer device and the switch device. A switch device including a network synchronizer function in a gateway device.

In general, a gateway is a network point that acts as an entrance to another network.

From a routing point of view, the Internet is a network of many gateway nodes and host nodes, where the host nodes are the computers of network users and the computers that provide content such as web pages. The gateway nodes are the computers that control traffic or the computers of Internet service providers.

In a company's network, a computer that acts as a gateway node often acts as a proxy server or firewall server. Gateways require the use of routers or switches.

1 is a block diagram of a general gateway device.

As shown therein, a network synchronizer device 10 which receives data and performs a network synchronizer; And a switch device 20 for receiving the data synchronized with the network synchronizer device 10 to perform a time slot exchange (TSI) function and output the data.

FIG. 2 is a detailed block diagram of the network synchronizer device of FIG. 1.

As illustrated, the clock synchronizer 12 receives either a clock source synchronized with a digital network from an interface device or a reference clock through a digital office timing supply (DOTS). A reference receiver 11 for transmitting to the terminal; A clock synchronizer (12) for receiving a clock source or a reference clock synchronized with the reference receiver (11) and generating a clock synchronized with the reference clock; The clock synchronizing unit 12 includes a clock distribution unit 13 which receives a clock generated by the clock synchronizing unit 12, divides it, and distributes the divided clock to each block of the system.

3 is a detailed block diagram of the switch device of FIG. 1.

As shown in the drawing, a system synchronization signal is received from the network synchronizer device 10 to generate a clock and frame synchronization signal necessary for TSI, and the control memory unit (Control Memory, CM) 23 and the voice memory unit (Sound) are generated. A clock receiving and distributing unit 21 for distributing to the memory, SM) 24, and each E1 or STM1 (Synchronous Transport Module level 1, 155.52 Mbps) subscriber unit; An upper matching unit 22 performing an interface function between the switch device 20 and the upper device; The clock is distributed from the clock receiving and distributing unit 21, the input / output control is performed through the upper matching unit 22, and the TSI control data is output by the sequential read address by the system synchronization clock and the frame synchronization signal. A control memory section 23; The clock is distributed from the clock receiving and distributing unit 21, the TSI control data output from the control memory unit 23 is applied to a random read address, and sequentially written, and stored pulse code modulation (PCM) pulses are stored. Code modulation) voice memory section 24 which performs output control so that the position of the time slot of the voice data is converted.

The operation of the conventional apparatus configured as described above will be described in detail with reference to the accompanying drawings.

First, the network synchronizer device 10 is a device for generating a clock synchronized with the digital network.

Thus, the reference receiving unit 11 in the network synchronizer device 10 receives a clock source synchronized with the digital network from an interface device such as E1 or STM1 or receives a reference clock through DOTS, thereby either one of the synchronized clock source or the reference clock. Is sent to the clock synchronizer 12.

The clock synchronizer 12 receives one of a clock source or a reference clock synchronized from the reference receiver 11 as a reference clock to generate a clock synchronized with the reference clock.

The clock distributor 13 receives and divides the clock generated by the clock synchronizer 12. This division distributes the divided clocks to each block of the system requiring the clocks.

On the other hand, the switch device 20 is a device that performs a time slot exchange function by receiving the data synchronized with the network device.

Thus, the clock receiving and distributing unit 21 in the switch device 20 receives the system synchronizing signal through the clock distributing unit 13 of the network synchronizer 10 to generate the clock and frame synchronizing signals required for the TSI. The clock and frame synchronizing signals generated in this way are distributed to the control memory unit 23, the voice memory unit 24, and each E1 or STM1 subscriber device.

The upper matching unit 22 performs an interface function between the switch device 20 and the upper device to perform a matching function to enable control of the upper device to the control memory unit 23.

The control memory unit 23 receives the clock from the clock receiving and distributing unit 21. Then, the I / O is controlled through the upper matching unit 22. In addition, the TSI control data is output by the sequential read address by the system synchronization clock and the frame synchronization signal.

The TSI control data output from the control memory section 23 is applied to an arbitrary read address of the voice memory section 24 to sequentially write, and output control is performed so that the position of the time slot of the stored PCM data is converted.

Thus, the voice memory unit 24 is controlled by the sequential write address by the system synchronous clock and the synchronous signal and by the read address by the TSI control data output from the control memory unit 23.

However, this conventional device has the following problems.

In other words, the conventional technology has a problem in that a large cost is made up of various types and a large number of cards in implementing such a technology. To implement a conventional network synchronizer device may be composed of two or three types of cards, the switch device is also composed of two or more types of cards, considering the redundancy is composed of a larger number of cards.

In addition, since the network device and the switch device are each composed of different self, they are expensive to maintain and install because they need to be connected by cables to match signals with each other. The combination of these devices lowers the reliability of the system. There was a problem.

Accordingly, the present invention has been proposed to solve the above-mentioned general problems, and an object of the present invention is to perform both the network synchronizer function and the switch function in one card without separately configuring the network synchronizer device and the switch device in the gateway device. The present invention provides a switch device including a network synchronizer function in a gateway device.

In order to achieve the above object, a switch device including a network synchronizer function in a gateway device according to an embodiment of the present invention,

A reference receiving unit which receives a clock source synchronized with the digital network from the interface device or receives a reference clock through DOTS and outputs one of them as a reference clock; A clock synchronizing unit which receives the reference clock output from the reference receiving unit, generates a clock synchronized by the control from the control unit, and transmits state information to the control unit; A clock distributor which receives the clock generated by the clock synchronizer and generates and outputs a reference pulse signal of the data stream and a synchronized clock; An upper matching unit performing an interface with an upper main processor so that call connection information of the system and state control and management of the network unit and the switch unit are performed by the upper main processor; A control unit which receives information from an upper main processor through the upper matching unit and controls the clock synchronization unit and the switch unit; And a switch unit configured to receive a reference pulse signal and a synchronous clock signal of a data stream from the clock distributor and to exchange time slots of serial data coming from an input highway under the control of the controller. It is done.

Hereinafter, an embodiment according to the spirit of the present invention as described above, a switch device including a network synchronizer function in the gateway device will be described with reference to the drawings.

4 is a block diagram of a switch device including a network synchronizer function in the gateway device according to the present invention.

As shown in the figure, a reference receiver 32 for receiving a clock source synchronized with a digital network from an interface device or receiving a reference clock through DOTS (Digital Office Timing Supply) and outputting one of them as a reference clock; A clock synchronizer 32 which receives the reference clock output from the reference receiver 31, generates a clock synchronized by the control from the controller 35, and transmits state information to the controller 35; A clock distributor 33 which receives the clock generated by the clock synchronizer 32 and generates and outputs a reference pulse signal of the data stream and a synchronized clock; An upper matching unit 34 performing an interface with an upper main processor so that call connection information of the system and state control and management of the network unit and the switch unit 36 are performed by the upper main processor; A control unit 35 receiving information from an upper main processor through the upper matching unit 34 and performing control of the clock synchronizer 32 and control of the switch unit 36; A switch unit 36 which receives a reference pulse signal of a data stream and a synchronous clock from the clock distributor 33, and exchanges time slots of serial data coming from an input highway under the control of the control unit 35. It is configured to include.

The operation of the switch device including the network synchronizer function in the gateway device according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First, the present invention intends to perform both the network synchronizer function and the switch function in one card without separately configuring the network synchronizer device and the switch device in the gateway device.

Therefore, the reference receiver 32 receives a clock source synchronized with the digital network from an interface device such as E1 or STM1 or receives a reference clock through DOTS (Digital Office Timing Supply) to synchronize the clock source or reference clock with the digital network. One is selected and output to the clock synchronizer 32.

The clock synchronizer 32 receives a reference clock selected and output by the reference receiver 31 from among a clock source or a reference clock synchronized with the digital network. Then, the clock synchronized by the control from the control unit 35 is generated. In addition, the state information of the system is transmitted and received to the control unit 35.

The clock distributor 33 receives the clock generated by the clock synchronizer 32 to generate and supply the reference pulse signal and the synchronous clock of the data stream to the switch unit 36, and also supplies the reference pulse signal and the synchronous clock of the data stream. Each block in this required system distributes a reference pulse signal and a synchronous clock.

The upper matching unit 34 interfaces with the upper main processor so that call connection information of the system and state control and management of the network unit and the switch unit 36 are performed by the upper main processor. Thus, the upper matching unit 34 receives information from the upper main processor to receive information such as connection and disconnection for time slot exchange, and transmits and receives a signal for reference selection or a signal for redundancy control.

The control unit 35 is configured using a microprocessor, and processes an instruction in the upper main processor through an interface with the upper main processor through the upper matching unit 34. The clock synchronizer 32 is then controlled to generate a synchronized clock. In addition, the control of the switch 36 allows time slots of serial data coming from the input highway to be exchanged with each other.

The switch unit 36 receives a reference pulse signal of the data stream and a synchronous clock from the clock distributor 33. Under the control of the control unit 35, the time slots of serial data coming from the input highway are exchanged with each other.

As described above, the present invention performs both the network synchronizer function and the switch function in one card without separately configuring the network synchronizer device and the switch device in the gateway device.

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

As described above, the switch device including the synchronizer function in the gateway device according to the present invention can perform both the synchronizer function and the switch function in one card without separately configuring the synchronizer device and the switch device in the gateway device. It is effective.

In addition, the present invention is not only easier to install and maintain than the conventional configuration by implementing a single card device and the switch device, but also to reduce the number of cards constituting the device and the switch device to reduce the cost This also reduces the reliability of the system.

1 is a block diagram of a general gateway device;

FIG. 2 is a detailed block diagram of the network synchronizer device of FIG. 1;

3 is a detailed block diagram of the switch device in FIG.

4 is a block diagram of a switch device including a network synchronizer function in the gateway device according to the present invention.

Explanation of symbols on the main parts of the drawings

10: network synchronizer 11: reference receiver

12 clock synchronization unit 13 clock distribution unit

20 switch device 21 clock reception and distribution unit

22: upper matching unit 23: control memory unit

24: voice memory unit 31: reference receiving unit

32: clock synchronizer 33: clock divider

34: upper matching unit 35: control unit

36: switch unit

Claims (1)

A reference receiving unit which receives a clock source synchronized with the digital network from the interface device or receives a reference clock through DOTS and outputs one of them as a reference clock; A clock synchronizing unit which receives the reference clock output from the reference receiving unit, generates a clock synchronized by the control from the control unit, and transmits state information to the control unit; A clock distributor which receives the clock generated by the clock synchronizer and generates and outputs a reference pulse signal of the data stream and a synchronized clock; An upper matching unit performing an interface with an upper main processor so that call connection information of the system and state control and management of the network unit and the switch unit are performed by the upper main processor; A control unit which receives information from an upper main processor through the upper matching unit and controls the clock synchronization unit and the switch unit; And a switch unit configured to receive a reference pulse signal and a synchronous clock signal of a data stream from the clock distributor, and exchange and output time slots of serial data coming from an input highway under the control of the controller. Switching device with synchronizing function in.