JPH0353626A - Frame conversion system - Google Patents

Abstract

PURPOSE:To easily convert the transmission speed of 64kb/s into the transmission speed of 56kb/s by eliminating a frame bit in an octet frame, arranging optional 19 frames consecutively, and adding a frame pattern in a length of 7-bit. CONSTITUTION:When a signal subject to octet multiplex processing in a speed of 64kb/s is converted into a signal in a speed of 56kb/s, 7-bit except a frame bit F in an octet frame 6 is extracted from a frame 7 and the frames are arranged consecutively by 19 channels. Then a frame pattern 9 of Y-bit length is added for frame identification to convert the original frame 7 into a frame 8 whose transmission speed is 56kb/s. Thus, the transmission speed of 64kb/s is converted into the transmission speed of 56kb/s.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a frame structure of an octet multiplexing system, and in particular, converts a signal octet multiplexed into 64 Kb/s to 56Kb/s! This relates to a frame conversion method for converting to I.

[Conventional technology]

FIG. 2 is a block diagram showing a conventional frame conversion method. In the figure, 1 is a 6 4 K b/s transmission line, 2 is a 6 4 K b/s system transmission line, and 2 is a 6 4 K b/s transmission line. system multiplexer, 3 is 5 6
K b/m system transmission line, 4 is 5 6 K b/. The system multiplexer 'S is a signal line connected on an individual signal basis between the 6 4 K b/l system multiplexer 2 and the 5 6 K b/s system multiplexer 4.

The frame conversion method using this configuration was performed by separating multiplexed signals into individual signals and connecting a multiplexer with a 64 Kb/a frame configuration to each individual signal. .

[Problem to be solved by the invention]

The conventional frame conversion method described above requires (2) two multiplexers with different frame configurations, and (3) the equipment scale increases because the signals are separated into individual signals and connected between the multiplexers. %C) In the case of the 6+2 envelope format and the octet multiplex format, there is a drawback that the transparency of network control codes such as return codes due to the combination of status bits (S bits) and data bits cannot be guaranteed due to frame separation.

[Means to solve the problem]

The frame conversion method according to the present invention deletes the frame ▲ bit in an octect, arranges any 19 consecutive frames, and adds a 7-bit frame pattern. ) to a transmission rate of 56 Kb/l.

[Effect]

The present invention can convert a transmission rate of 964 Kb/● to a transmission rate of 56 Kb/a by using the 4-bit method.

〔Example〕

FIG. 1 is a diagram showing a frame structure showing an embodiment of the frame conversion method according to the invention. In the figure, 6 is a 3.2K'/1 octet frame organized as 1-bit frame pit F, 6-bit data bit D, and 1-bit data pit D or status bit S, and 7 is a 3.2K'/1 octet frame structured as follows. The octet frame 6 of 20 channels is composed of a frame multiplexed at 64 Kb/s using x50 frame patterns F1 to h●, an 8Fi 7-bit length frame pattern 9, and an octet frame 10 with frame bits deleted, resulting in a 56 Kb/s frame. /s is a multiplexed claim.

Note that 11 is a frame bit.

Next, the conversion operation of the frame conversion method according to the above structure will be explained. octet 7 from frame T
By extracting 7 bits excluding frame bit F in the frame ▲6, centrally arranging this frame for 19 channels, and adding a 7-bit long frame pattern 9 for frame identification, l) 56Kb /s frame 8
It can be converted to . [Effects of the Invention] As explained in detail above, according to the frame conversion method according to the present invention, a signal octet multiplexed at 64 Kb/s is transmitted using x50 frame packets. In the multiplexer, frame bits within an octet are deleted, arbitrary 19 frames are arranged consecutively, and a 7-bit length frame pattern is added, thereby easily increasing the transmission rate from 64 Kb/I to 56 Kt/s.
It has the effect of converting the transmission speed to .

[Brief explanation of drawings]

FIG. 1 is a diagram showing a frame structure showing an embodiment of the 7-ray ▲ conversion method according to the present invention, and FIG. 2 is a block diagram showing a conventional frame conversion method. 6●●●●octet frame▲, 7●●●●64Kb/
Frames multiplexed to a, 8・●・・5 6 K b
/s frame multiplexed, 9...●●7 bit length 7 ray ▲ pattern, 10●●●● frame octet frame with bits removed.

Claims (1)

[Claims] In a multiplexer that transmits a 64 Kb/s octet multiplexed signal using the
A frame conversion method characterized by sequentially arranging frames and adding a 7-bit frame pattern to convert the transmission rate to 56 Kb/s.