KR20010083747A - The network synchronization system for simvltaneously receiving a referlnce clock of e1 and rs-422 - Google Patents

Abstract

PURPOSE: A network synchronization apparatus receiving E1 and RS-422 method reference clocks at the same time is provided to solve the problems caused by an interface between a trunk line matching board and a reference clock receiving board, and improve the efficiency of the trunk line board by directly receiving E1 method reference clock at the reference clock receiving board. CONSTITUTION: An E1 matching part(31) receives E1 method reference clock supplied from a clock supply device(10). An RS-422 method matching part(32) receives RS-422 method reference clock supplied from the clock supply device(10). A reference clock selecting part(33) selects either E1 method reference clock or RS-422 method reference clock. A system clock reference clock generating part(34) generates the selected reference clock as a reference clock for generating a system clock and transmits the reference clock to a system clock generating board(40). A system clock distributing part(35) receives the system clocks generated in the system clock generating board for distributing the system clocks.

Description

1, RS-422 reference clock for accommodating simultaneously. {THE NETWORK SYNCHRONIZATION SYSTEM FOR SIMVLTANEOUSLY RECEIVING A REFERLNCE CLOCK OF E1 AND RS-422}

According to the present invention, in a communication switch for accommodating a network synchronizer device, an E1 reference clock is directly received from a reference clock receiving circuit pack without going through a relay line matching circuit pack, and an E1 reference clock and an RS-422 reference clock are used. Device to simultaneously accept E1 and RS-422 reference clocks to solve the problems caused by the interface between the relay line matching circuit pack and the reference clock receiving circuit pack and to increase the efficiency of the relay line matching circuit pack. It is about.

1 is a block diagram of a network synchronizer device for receiving a reference clock, including a conventional trunk line matching circuit pack, including a clock supply device 1 for supplying an E1 reference clock and an RS-422 reference clock, and an E1 match. A relay line matching circuit pack 2 for performing a function to extract an E1 type reference clock supplied from the clock supply device 1 as a RS-422 reference clock, and an RS supplied from the clock supply device 1 A system using a reference clock receiving circuit pack 4 and a reference clock received from the reference clock receiving circuit pack 4 for receiving a reference clock of -422 type or a reference clock extracted from the relay line matching circuit pack 2 It consists of a network synchronizer device 3 composed of a system clock generation circuit pack 5 for generating a clock.

In the above configuration, when the RS-422 type reference clock is supplied from the clock supply device 1, the RS-422 type reference clock is used by the reference clock receiving circuit pack 4 in the conventional network synchronizer device 3. Direct reception is possible, so it can be used as a reference clock to generate the system clock.

On the other hand, when receiving the reference clock of the E1 method supplied from the clock supply device 1 in the manipulator device 3, direct reception is impossible. Therefore, the relay line matching circuit pack 2 having the E1 matching function must be used. By extracting the reference clock of the E1 method to the reference clock of the RS-422 method that can be received by the network synchronizer (3) to be received by the reference clock receiving circuit pack (4).

That is, in the conventional network synchronizer 3, the E1 type reference clock can be received only through the relay line matching circuit pack 2, which has to allocate resources to receive the E1 type reference clock.

However, if the E1 reference clock is distorted due to a malfunction of the relay matching circuit pack 2, the system clock becomes unstable regardless of the reference clock received from the outside. Due to the interface with the reference clock receiving circuit pack 4 in the network synchronizer device 3, a problem of system clock instability occurs.

In addition, as described above, when the relay line matching circuit pack 2 allocates resources only to receive the reference clock of the E1 method, the resources of the relay line matching circuit pack 2 may not be properly used, and thus the utilization of the entire resource and the link may be very difficult. There is also an inefficient problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and its object is to provide a reference clock of an E1 type reference clock received from the outside without going through a relay line matching circuit pack in various communication exchangers accommodating a network synchronizer device. By receiving directly from the circuit pack and receiving the E1 type reference clock and RS-422 type reference clock simultaneously, the problem caused by the interface between the relay line matching circuit pack and the reference clock receiving circuit pack is solved, and the resources of the relay line matching circuit pack are saved. It is to provide a network synchronizer that simultaneously accepts E1 and RS-422 reference clocks to maximize the efficiency of the trunk line matching circuit pack.

1 is a block diagram of a network synchronizer device for receiving a reference clock, including a conventional trunk line matching circuit pack,

Figure 2 is a block diagram of a network synchronizer device for simultaneously receiving a reference clock of this, RS-422 method according to the present invention.

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

10: clock supply device 20: synchronizer device

30: reference clock receiving circuit pack 31: E1 matching section

32: RS-422 matching section 33: reference clock selector

34: system clock reference clock generator 35: system clock distributor

40: system clock generation circuit pack

In order to achieve the above object, a network synchronizer for accommodating an E1 and RS-422 reference clock of the present invention is provided with an E1 scheme through an E1 matching unit in a reference clock receiving circuit pack when an E1 reference clock is supplied from a clock supply device. Receives the reference clock of the RS-422 method, and when the RS-422 reference clock is supplied through the RS-422 matching unit in the reference clock receiving circuit pack receives the RS-422 reference clock, and then the received E1 method through the reference clock selection unit After selecting the reference clock or RS-422 type reference clock, the system clock reference clock generator generates the selected reference clock as a system clock generation reference clock and transmits it to the system clock generation circuit pack, and the system clock generation circuit pack. Generates a system clock using the reference clock transmitted from the system clock reference clock generator, and generates the generated system clock. Characterized in that the supply to the system.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the network synchronizer device for simultaneously receiving the reference clock of the E1, RS-422 method according to the present invention.

FIG. 2 is a block diagram of a network synchronizer for simultaneously receiving an E1 and RS-422 reference clock according to an embodiment of the present invention, and a clock supply device 10 for supplying an E1 reference clock and an RS-422 reference clock. ), And the reference clock receiving circuit pack 30 and the reference clock receiving circuit pack 30 which select and receive an E1 type reference clock or an RS-422 type reference clock supplied from the clock supply device 10. It consists of a network synchronizer device 20 consisting of a system clock generation circuit pack 40 that generates a system clock using the received reference clock.

The reference clock receiving circuit pack 30 in the network synchronizer device 20 performs an E1 matching function to receive an E1 matching reference clock supplied from the clock supply device 10, and RS-422 matching unit 32 for receiving the RS-422 reference clock supplied from the clock supply device 10 and E1 reference clock or RS-422 matching received from the E1 matching unit 31. A reference clock selector 33 for selecting a reference clock of the RS-422 method received from the unit 32 and a reference clock selected by the reference clock selector 33 as a system clock generation reference clock to generate the reference clock; And a system clock reference clock generator 34 for transmitting to the clock generator circuit pack 40 and a system clock distributor 35 for receiving and distributing the system clock generated by the system clock generator circuit pack 40. .

In the present invention configured as described above, the E1 matching unit included in the conventional relay line matching circuit pack in order to directly receive the reference clock of the E1 method in the network synchronizer device 20 includes an E1 matching unit in the reference clock receiving circuit pack 30 ( 31).

Therefore, regardless of whether the clock supply device 10 supplies the reference clock of the E1 method or the RS-422 reference clock, the apparatus 20 directly in the network synchronizer device 20 without passing through the conventional relay line matching circuit pack. The reference clock receiving circuit pack 30 can directly receive the reference clock of the E1 method as well as the RS-422 reference clock.

Referring to the operation of the network synchronizer 20 for simultaneously receiving the reference clock of the E1, RS-422 method of the present invention configured as described above are as follows.

When the E1 reference clock is supplied from the clock supply device 10, the E1 matching unit 31 in the reference clock receiving circuit pack 30 of the network synchronizer 20 performs an E1 matching function, thereby providing the clock supply device 10. RS-422 matching unit 32 in the reference clock receiving circuit pack 30 of the network synchronizer device 20 when the reference clock of the E1 method is supplied, and the RS-422 reference clock is supplied. The RS-422 reference clocks supplied from the supply device 10 are respectively received.

Subsequently, the reference clock selector 33 may use either the E1 reference clock received by the E1 matching unit 31 or the RS-422 reference clock received by the RS-422 matching unit 32. The reference clock is selected and transmitted to the system clock reference clock generator 34.

Thereafter, the system clock reference clock generator 34 generates the reference clock selected by the reference clock selector 33 as a system clock generation reference clock and transmits the reference clock to the system clock generation circuit pack 40.

Then, the system clock generation circuit pack 40 generates a system clock using the reference clock transmitted from the system clock reference clock generator 34, and supplies the generated system clock to the system.

The system clock distributor 35 receives and distributes a system clock generated by the system clock generation circuit pack 40.

As described above, the network synchronizer device of the present invention directly receives the reference clock of the E1 method from the reference clock receiving circuit pack without passing through the relay line matching circuit pack, thereby providing the reference clock of the E1 method and the reference clock of the RS-422 method. By accommodating at the same time, the problem caused by the interface between the relay line matching circuit pack and the reference clock receiving circuit pack is solved, and the efficiency of the relay line matching circuit pack can be improved by maximizing the resources of the relay line matching circuit pack.

Claims (1)

Generation of a system clock that generates a system clock using a reference clock receiving circuit pack for receiving an E1 type reference clock or an RS-422 type reference clock supplied from a clock supply device and a reference clock received from the reference clock receiving circuit pack. In the network synchronizer device consisting of a circuit pack, The reference clock receiving circuit pack, An E1 matching unit receiving an E1 reference clock supplied from the clock supply device by performing an E1 matching function, an RS-422 matching unit receiving an RS-422 reference clock supplied from the clock supply device; A reference clock selector for selecting an E1 reference clock received by the E1 matching unit or an RS-422 reference clock received by the RS-422 matching unit, and a reference clock selected by the reference clock selector; And a system clock reference clock generator for generating a reference clock for generation and transmitting the system clock generator to a system clock generation circuit pack, and a system clock distribution unit for receiving and distributing a system clock generated by the system clock generation circuit pack. 1, A synchronism device for accommodating the RS-422 reference clock at the same time.