JPH0548559A - Multiplexer - Google Patents

Abstract

(57) [Abstract] [Purpose] To efficiently transmit a voice signal through a non-bit-steel transmission line. In a multiplexer 10 on a transmitting side, a voice signal from a bit-steel transmission line 1 and a data signal from a low-speed line 2 are subjected to synchronization processing and time slot switching, and then a multi-frame pattern replacement unit 104, the number of multi-frames of the bit-steel transmission line and X. 120 frames / which is the least common multiple of 50 multiframes
Phase matching is performed on the multi-frame phase generated by the number of multi-frames of the multi-frame, and a certain X. The 50 frames are replaced with a pattern of 120 frames / multi-frame structure and transmitted to the non-bit steal transmission line 5. On the other hand, in the multiplexing device 11 on the receiving side, the voice signal and the data signal are separated by the separation unit 106,
Respectively buffered, X. After reproducing the 50-frame pattern or timing adjustment, it is sent to the line 3 and the transmission line 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multiplexer, and more particularly to an octet multiplexer for transmitting a data signal transmitted through a bit-steel transmission line and a low speed line through a non-bit-steel transmission line.

[0002]

2. Description of the Related Art In a conventional octet multiplexer of this type, a voice data signal (hereinafter, simply referred to as a voice signal) transmitted through a bit-steel transmission line is transmitted through a non-bit-steel transmission line based on an out-channel system. ing. That is, the audio signal input from the bit-steel transmission line is transmitted by X. X.50 received from the non-bit-steel transmission line while being replaced with the 50-frame pattern and transmitted to the non-bit-steel transmission line. The 50-frame pattern data is decomposed, a part of the voice signal is replaced with signaling, and the data is sent to the bit-steel transmission line.

[0003]

As described above, in the conventional octet multiplexer, when the voice signal transmitted through the bit-steel transmission line is transmitted through the non-bit-steel transmission line, the signaling of the voice signal is X.264. Since the 50-frame pattern is replaced and the data is transmitted through the non-bit-steel transmission line, a channel for performing signaling transmission is required in the form of a transmission line, and there is a problem that a voice signal cannot be transmitted efficiently.

An object of the present invention is to solve the above problems and to provide a multiplexing device capable of efficiently transmitting a voice signal through a non-bit steal transmission line.

[0005]

According to a first aspect of the present invention, a first data signal is received from a bit-steel transmission line, and X.X. In a multiplexer for receiving a second data signal multiplexed in 50 frames and transmitting the first and second data signals to a non-bit-steel transmission line, the first and second data signals are , The number of multi-frames of the bit-steel transmission line and X. Phase matching is performed on a multi-frame phase generated by a multi-frame number that is a common multiple of 50 multi-frame numbers, and a specific X. The present invention is characterized by comprising multi-frame pattern replacement means for replacing 50 frames with an original common multiple multi-frame pattern and transmitting the same to the non-bit steal transmission path.

According to a second aspect of the present invention, a first data signal for transmitting a multiplexed data signal received from a non-bit-steel transmission line to the bit-steel transmission line, and an X.X. In a multiplexer which separates into a second data signal multiplexed in 50 frames and transmits to a bit-steel transmission line and a low-speed line respectively, the multiplexed data signal received from the non-bit-steel transmission line is converted into the bit data. The number of multi-frames in the steel transmission line and X. Data separation means for synchronizing the first data signal and the second data signal by synchronizing with a multi-frame number which is a common multiple of 50 multi-frame numbers, and the first data separation means for separating the first data signal and the second data signal. First buffer means for reproducing multi-frame timing of a data signal and buffering the first data signal in each multi-frame unit, and multi-frame timing of the second data signal separated by the data separating means And second buffer means for buffering the second data signal in each multi-frame unit, and receiving the first data signal from the first buffer means, and receiving the first data signal in accordance with the transmission multi-frame timing. A multi-frame synchronization pattern replacement means for sending to a bit-steel transmission line; Receiving the second data signal from the Ffa unit, X. Fifty
A data signal having a frame pattern is reproduced and transmitted to the low-speed line. 50 frame pattern replacement means is provided.

[0007]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 shows an example of the multiplexer according to the first and second inventions. It is assumed here that the audio signal transmitted through the bit-steel transmission path has a structure of 24 channels / frame and 24 frames / multiframe, for the sake of convenience, one audio channel is encoded at 64 Kbit / sec. ..

In the multiplexer 10 on the transmission side, for the voice signal input from the bit-steel transmission line 1,
The frame synchronization processing unit 101 synchronizes every 24 frames. On the other hand, for the data signal input from the low-speed line 2, X. X.50 in the 50-frame synchronization processing unit 102. Synchronization is achieved by a 50 frame pattern.

Then, these synchronization processing units 101 and 102
The audio and data signals respectively output from
The data is input to the TSI unit 103, and the time slots are exchanged for each channel there. Then, the signal is sent to the multi-frame pattern changing section 104, where the number of multi-frames in the bit-steel transmission line and the X.X. 120 frames / which is the least common multiple of 50 multiframes
Phase matching is performed on the multi-frame phase generated by the number of multi-frames of the multi-frame, and a certain X. The 50 frames are replaced with a pattern of 120 frames / multi-frame structure and transmitted to the non-bit steal transmission line 5.

On the other hand, in the multiplexing device 11 on the receiving side, the multi-frame synchronization processing unit 105, for the multiplexed data received from the non-bit-steel transmission line 5, sets the number of multi-frames of the bit-steel transmission line and the X.X. Synchronization is performed with the number of multiframes of 120 frames / multiframe, which is the least common multiple of 50 multiframes. Then, the separation unit 106 receives the signal from the synchronization processing unit 105, separates it into a data signal and a voice signal, and outputs them to the data multi-frame management buffer unit 107 and the voice multi-frame management buffer unit 109, respectively. Upon receiving the data signal, the buffer unit 107 reproduces the multi-frame timing and buffers it in units of 20 multi-frames. On the other hand, when the buffer unit 109 receives the audio signal, the buffer unit 109 reproduces the multiframe timing and buffers it in units of 24 multiframes.

Then, X. The 50-frame pattern replacement unit 108 receives the data signal from the buffer 107,
X. The data signal of 50 frame pattern is reproduced and sent to the low speed line 3. On the other hand, the multi-frame synchronization pattern replacement unit 110 receives the audio signal from the buffer unit 109 and sends it to the bit-steel transmission line 4 at the sending multi-frame timing.

In this embodiment, the output signal of the TSI section 103 is sent to the multi-frame pattern changing section 104 by the number of multi-frames of the bit-steel transmission line and the X.
The phase alignment is performed on the multi-frame phase generated by the number of multi-frames which is the least common multiple of 50 multi-frames, but the least common multiple is adopted as an example.
The number of multi-frames in the bit-steel transmission line and X. Fifty
The effect of the present invention is not impaired even if it is set to any common multiple of the number of multi-frames.

[0013]

As described above, according to the first invention, the first data signal is received from the bit-steel transmission line, and the X.X. In a multiplexer for receiving a second data signal multiplexed in 50 frames and transmitting the first and second data signals to a non-bit steal transmission line, the first and second data signals are The number of multi-frames in the bit-steel transmission line and X. Phase matching is performed on a multi-frame phase generated by a multi-frame number that is a common multiple of 50 multi-frame numbers, and a specific X.
The multi-frame pattern replacement means is provided for replacing 50 frames with an original common multiple multi-frame pattern and transmitting the same to the non-bit steal transmission line.

The second aspect of the present invention is the first data signal for transmitting the multiplexed data signal received from the non-bit-steel transmission line to the bit-steel transmission line; In a multiplexer that separates into a second data signal multiplexed in 50 frames and transmits to a bit-steel transmission line and a low-speed line, respectively, a multiplexed data signal received from a non-bit-steel transmission line is transmitted by bit-steel transmission. Number of multi-frames in the path and X. Data separation means for synchronizing the first data signal and the second data signal by synchronizing with a multi-frame number that is a common multiple of 50 multi-frame numbers;
The first multi-frame timing of the first data signal separated by the data separation means is reproduced, and the first data signal is buffered in each multi-frame unit.
Buffer means, second buffer means for reproducing the multi-frame timing of the second data signal separated by the data separation means, and buffering the second data signal in units of each multi-frame, and the first buffer. Means for receiving the first data signal from the means, receiving the second data signal from the second buffer means, and the multi-frame synchronization pattern changing means for sending to the bit-steel transmission line at the timing of the sending multi-frame, and X. Fifty
The data signal of the frame pattern is reproduced and transmitted to the low speed line. And 50 pattern replacement means.

Therefore, the multiplexer according to the first aspect of the present invention sends out the voice signal as the first data signal to the non-bit steal transmission line, and the multiplexer according to the second aspect of the present invention transmits the voice signal from the non-bit steal transmission line. If you receive
In the multiplexer according to the first aspect of the present invention, the voice signal and the second data signal are the number of multi-frames of the bit-steel transmission line and the X.X. Phase matching is performed on a multi-frame phase generated by a multi-frame number that is a common multiple of 50 multi-frame numbers, and a certain X. Out-channel because 50 frames are converted to unique common multiple frame patterns and transmitted to the non-bit-steel transmission line, and in the multiplexing device according to the second invention, the voice signal and the second data signal are separated. It is possible to efficiently transmit a voice signal without requiring a channel for signaling transmission as in the case of using the method.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of a multiplexing device according to the first and second inventions.

[Explanation of symbols]

 1, 4 bit Steel transmission line 2, 3 Low speed line 5 Non-bit Steel transmission line 10, 11 Multiplexing device 101 Frame synchronization processing unit 102 X. 50 frame synchronization processing unit 103 TSI unit 104 multi-frame pattern replacement unit 105 multi-frame synchronization processing unit 106 separation unit 107 multi-frame management buffer unit for data 108 X. 50 frame pattern replacement unit 109 voice multi-frame management buffer unit 110 multi-frame synchronization pattern replacement unit

Front Page Continuation (72) Inventor Tsunehiro Okumura 1-42 Mita, Minato-ku, Tokyo NEC Corporation Transmission Engineering Co., Ltd.

Claims (2)

[Claims] 1. A first data signal is received from a bit-steel transmission line, and X. A multiplexer for receiving a second data signal multiplexed in 50 frames and transmitting the first and second data signals to a non-bit-steel transmission line, wherein the first and second data signals are , The number of multi-frames of the bit-steel transmission line and X. Phase matching is performed on a multi-frame phase generated by a multi-frame number that is a common multiple of 50 multi-frame numbers, and a specific X. A multiplexing device comprising a multi-frame pattern changing means for changing 50 frames to an original common multiple multi-frame pattern and transmitting the same to the non-bit-steel transmission line. 2. A first data signal for transmitting a multiplexed data signal received from a non-bit-steel transmission line to a bit-steel transmission line; In a multiplexer for separating into a second data signal multiplexed in 50 frames and transmitting to a bit-steel transmission line and a low-speed line respectively, the multiplexed data signal received from the non-bit-steel transmission line is converted into the bit data. The number of multi-frames in the steel transmission line and X. Data separation means for synchronizing the first data signal and the second data signal by synchronizing with a multi-frame number that is a common multiple of 50 multi-frame numbers, and the first data separation means that separates the first data signal and the second data signal. First buffer means for reproducing the multi-frame timing of the data signal and buffering the first data signal in each multi-frame unit; and multi-frame timing of the second data signal separated by the data separating means. And second buffer means for buffering the second data signal in each multi-frame unit, receiving the first data signal from the first buffer means, and receiving the first data signal in synchronization with the transmission multi-frame timing. A multi-frame synchronization pattern replacement means for sending to a bit-steel transmission line; The second data signal from the buffer means of X. A data signal of 50 frame pattern is reproduced and transmitted to the low speed line. A multiplexing device comprising 50 frame pattern replacement means.