KR970009547B1

KR970009547B1 - Switching system

Info

Publication number: KR970009547B1
Application number: KR1019940027718A
Authority: KR
Inventors: 조해정
Original assignee: 삼성전자 주식회사; 김광호
Priority date: 1994-10-27
Filing date: 1994-10-27
Publication date: 1997-06-14

Abstract

The circuit for varying the transmission speed of line-exchanging system includes; 1) a speed selecting unit(28) for selecting transmission speed requested by an external system; 2) a transmission speed-varying unit(20) which extracts a data from a previously determined frame format at a selected transmission speed; 3) a receiving clock speed varying unit(24) for varying speed of receiving clock, and a receiving speed varying unit(26) which transmits a data in the previously determined frame format at a selected transmission speed on highway.

Description

Variable Speed Transmission Circuit of Switching System

제1도는 일반적인 교환시스템의 전송부의 블럭구성도.1 is a block diagram of a transmission unit of a general switching system.

제2도는 본 발명에 따른 전송속도 가변회로를 포함한 전송부의 블럭구성도.2 is a block diagram of a transmission unit including a variable speed transmission circuit according to the present invention.

제3a도 및 제3b도는 전송속도에 따른 하이웨이상의 프레임 포맷도.3A and 3B are frame format diagrams on highways according to transmission rates.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

20 : 전송속도 가변회로 22 : 송신속도 변환부20: variable speed circuit 22: transmission speed conversion unit

24 : 수신클럭 속도변환부 26 : 수신속도 변환부24: reception clock speed conversion unit 26: reception speed conversion unit

28 : 속도선택부28: speed selector

본 발명은 회선교환시스템에 관한 것으로, 특히 전송속도를 가변하는 회로에 관한 것이다.The present invention relates to a circuit switched system, and more particularly to a circuit for varying transmission speed.

일반적으로 회선교환시스템의 전송부는 제1도와 같이 데이타처리 및 디코딩부(10)와 부호/복호부(12)와 펄스발생부(14)와 펄스재생 및 클럭추출부(16)와 선로정합부(18)로 구성된다. 제1도와 같은 회선교환시스템에서 전송속도가 정해지면 전송매체에 따라 최대 전송가능한 거리가 결정된다. 만일 이러한 교환시스템을 이동성있는 집단에서 사용할 때 요구되는 전송거리에 따라 이를 만족시킬 수 있는 별도의 장비를 필요로 하므로 이중으로 장비를 갖추어야 한다.In general, the transmitting unit of the circuit switching system includes the data processing and decoding unit 10, the code / decoder 12, the pulse generator 14, the pulse reproducing and clock extracting unit 16, and the line matching unit as shown in FIG. 18). When the transmission speed is determined in the circuit switching system as shown in FIG. 1, the maximum transmission distance is determined according to the transmission medium. If this exchange system is used in a mobile group, it is necessary to equip it in duplicate because it requires separate equipment to satisfy it according to the transmission distance required.

따라서 본 발명의 목적은 하나의 회선교환시스템의 전송속도를 가변함으로써 각기 다른 단일 전송속도의 시스템을 통합할 수 있는 전송속도 가변회로를 제공함에 있다.It is therefore an object of the present invention to provide a variable transmission rate circuit that can integrate different single transmission rate systems by varying the transmission rate of one circuit switched system.

이하 본 발명을 첨부한 도면을 참조하여 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

제2도는 본 발명에 따른 전송속도 가변회로를 포함한 전송부의 블럭구성도로서 제1도와 같은 일반적인 회선교환시스템의 전송부에서 데이티처리 및 디코딩부(10)와 부호/복호부(12) 사이에 속도가변부(20)를 추가하여 구성한 것이다. 제2도에서 속도선택부(28)는 외부에서 제어신호를 받아 요구되는 전송속도모드로 선택한다. 송신속도변환부(22)는 요구되는 전송속도에 따라 미리 설정된 프레임 포맷으로부터 데이타를 추출하고 요구되는 전송속도의 데이타길이로 변환되어 부호/복호부(12)에 인가한다. 수신속도변환부(26)는 요구되는 속도에 따라 미리 설정된 프레임 포맷으로 데이타를 하이웨이상에 실어 전송한다.2 is a block diagram of a transmission unit including a variable speed transmission circuit according to an embodiment of the present invention, which is provided between the data processing and decoding unit 10 and the code / decoding unit 12 in a transmission unit of a general circuit switching system as shown in FIG. The speed variable part 20 is added and comprised. In FIG. 2, the speed selector 28 receives a control signal from the outside and selects the required transmission speed mode. The transmission rate converting section 22 extracts data from a preset frame format according to the required transmission rate, converts it to the data length of the required transmission rate, and applies it to the code / decoding section 12. The reception speed converter 26 loads data on the highway in a frame format preset according to the required speed.

제3a도 및 제3b도는 전송속도에 따른 하이웨이상의 프레임 포맷도이다.3A and 3B are frame format diagrams on highways according to transmission rates.

이하 본 발명에 따른 제2도의 동작예를 제3a도 및 제3b도의 프레임 포맷도를 참조하여 상세히 설명한다.An operation example of FIG. 2 according to the present invention will now be described in detail with reference to the frame format diagrams of FIGS. 3A and 3B.

우선 제2도와 같이 구현되는 시스템에서 시스템클럭 SCLK로는 가변 가능한 전송속도중 가장 높은 클럭을 사용한다. 이에 따른 하이웨이상의 프레임 포맷은 각 전송속도에 따라 비트 길이가 달라진다. 만일 가변된 전송속도중 가장 높은 전송속도가 A라면 하이웨이상에서 프레임 포맷은 제3a도와 같이 각 채널을 그대로 사용하면 된다. 그러나 이보다 낮은 전송속도 B로 속도가변되었다면 송수신시 하이웨이상에서의 프레임 포맷은 제3b도와 같이 전송속도 B의 사이클(cycle)만큼의 비트 길이가 되게 함으로써 속도가변된 데이타를 송수신할 수 있다.First, in the system implemented as shown in FIG. 2, the system clock SCLK uses the highest clock among the variable transmission speeds. As a result, the frame format on the highway varies in bit length according to each transmission rate. If the highest transmission rate among the variable transmission rates is A, the frame format on the highway may use each channel as shown in FIG. 3a. However, if the speed is changed to a lower transmission rate B, the frame format on the highway during transmission and reception may transmit and receive the speed-variable data by making the bit length as long as the cycle of transmission rate B as shown in FIG. 3b.

지금 외부에서 제어신호를 받아 속도선택부(28)에서 요구되는 전송속도모드로 선택되면, 송신속도변환부(22)에서는 요구되는 전송속도에 따라 제3a도 및 제3b도와 같은 프레임 포맷에 미리 설정된 프레임 포맷으로부터 데이타를 추출하고 요구되는 전송속도의 데이타길이로 변환되어 부호/복호부(12)에 인가함으로써 선로부호화 된다. 또한 수신속도변환부(26)는 요구되는 속도에 따라 미리 설정된 프레임 포맷으로 데이타를 하이웨이상에 실여 전송한다.Now, when the control signal is received from the outside and the transmission speed mode required by the speed selection unit 28 is selected, the transmission speed conversion unit 22 is preset in frame formats such as FIGS. 3A and 3B according to the required transmission speed. The line is coded by extracting data from the frame format, converting it to the data length of the required transmission rate, and applying it to the code / decoder 12. In addition, the reception speed conversion unit 26 carries data on the highway in a preset frame format according to the required speed.

따라서 근거리에서 필요에 따라 전송속도를 높임으로써 가입자 수용에 유연성을 가질 수 있으며 각 시스템의 이격거리도 유연성을 줄 수 있게 된다.Therefore, by increasing the transmission speed as needed in the short-range, it can have flexibility in subscriber acceptance, and the separation distance of each system can also give flexibility.

또한 이러한 방법을 확정하면 다양한 전송속도를 통합하에 지원할 수 있고 이격거리에 따라 가입자 수용능력의 유연성을 제공할 수 있는 교환시스템을 구현할 수 있다.In addition, if this method is confirmed, it is possible to implement a switching system that can support various transmission speeds in an integrated manner and provide flexibility of subscriber capacity according to the separation distance.

상술한 바와 같이 본 발명은 하나의 회선교환시스템이 전송속도를 가변하여 각기 다른 단일 전송속도의 시스템을 통합할 수 있음으로써 다양한 전송속도를 통합하에 지원할 수 있고 이격거리에 따라 가입자 수용능력의 유연성을 제공할 수 있는 잇점이 있다.As described above, the present invention can support a variety of transmission rates by integrating different single transmission systems by varying transmission speeds of one circuit switching system, and provide flexibility in subscriber capacity according to the separation distance. There are advantages that can be provided.

Claims

A transmission rate variable circuit of an exchange system, comprising: a speed selecting means for selecting a required transmission rate mode in response to an external control signal, and extracting data from a preset frame format according to the transmission rate according to the selected transmission rate mode; A transmission speed conversion means, a reception clock speed conversion means for converting the speed of the reception clock, and a reception speed conversion means for carrying data on a highway in a frame format preset according to the transmission speed according to the selected transmission speed mode. Variable speed transmission circuit of the exchange system, characterized in that.

2. A variable transmission rate circuit as claimed in claim 1, wherein said transmission rate converting means makes each channel of said frame format as long as one cycle of said selected transmission rate.

A transmission rate variable circuit of an exchange system, comprising: data processing and decoding means for processing and decoding data on a transceiving highway of the switching system, and encoding and transmitting the processed data and decoding received data to decode the data processing and decoding means. Encoding / decoding means for providing a signal, pulse generating means for generating a pulse from the encoded data, pulse reproducing and clock extraction means for reproducing a pulse from a received signal and extracting a clock to provide to the encoding / decoding means; A line matching means connected to the pulse generating means, a pulse reproducing and clock extracting means, and a line for matching transmission and reception signals, and a variable speed stage for varying a transmission speed of data transmitted and received between the data processing and decoding means. Variable speed transmission circuit of the exchange system, characterized in that.

4. The apparatus as claimed in claim 3, wherein the speed variable stage selects a data rate from a preset frame format according to a transmission rate according to the selected transmission rate mode, and speed selection means for selecting a transmission rate mode required in response to an external control signal. Transmission rate converting means for converting the speed of the reception clock; receiving rate converting means for converting the speed of the reception clock; and receiving rate converting means for transmitting data on the highway in a frame format preset according to the transmission rate according to the selected transmission rate mode. Variable speed transmission circuit of the exchange system, characterized in that provided.

5. The variable transmission rate circuit of claim 4, wherein the transmission rate converting means makes each channel of the frame format as long as one cycle of the selected transmission rate.