JP3102163B2 - F1 byte transfer method in SDH signal transmission system - Google Patents
F1 byte transfer method in SDH signal transmission systemInfo
- Publication number
- JP3102163B2 JP3102163B2 JP29502092A JP29502092A JP3102163B2 JP 3102163 B2 JP3102163 B2 JP 3102163B2 JP 29502092 A JP29502092 A JP 29502092A JP 29502092 A JP29502092 A JP 29502092A JP 3102163 B2 JP3102163 B2 JP 3102163B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- stm
- byte
- relay device
- frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
- H04J3/1605—Fixed allocated frame structures
- H04J3/1611—Synchronous digital hierarchy [SDH] or SONET
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Time-Division Multiplex Systems (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はＳＤＨ（Ｓｙｎｃｈｒｏ
ｎｏｕｓ Ｄｉｇｉｔａｌ Ｈｉｅｒａｒ−ｃｈｙ）信
号伝送システムにおけるＦ１バイト転送方式に関し、特
にＳＴＭ−Ｎ（Ｓｙｎｃｈｒｏｎｏｕｓ Ｔｒａｎｓｍ
ｉｓｓｉｏｎ Ｍｏｄｕｌｅ−Ｎ）信号のＲ−ＳＯＨ
（Ｒｅｇｅｎｅｒａｔｏｒ Ｓｅｃｔｉｏｎ Ｏｖｅｒ
ｈｅａｄ）のみを終端してＳＴＭ−Ｍ（Ｎ＜Ｍ）信号に
多重化するシステムにおけるＦ１バイト転送方式に関す
る。BACKGROUND OF THE INVENTION The present invention relates to an SDH (Synchronous
More specifically, the present invention relates to an F1 byte transfer system in a nous Digital Hierarchy-chy (signal) transmission system, and particularly to an STM-N (Synchronous Transmit).
R-SOH of the issue module-N) signal
(Regenerator Section Over
The present invention relates to an F1 byte transfer method in a system that terminates only a head and multiplexes it into an STM-M (N <M) signal.
【０００２】[0002]
【従来の技術】近年、上述のＳＤＨ信号伝送方式が、Ｃ
ＣＩＴＴで活発に議論かつ推奨されることにより、光基
幹伝送システムとして国際的に採用されつつある。2. Description of the Related Art In recent years, the above-mentioned SDH signal transmission system has
Actively discussed and recommended by CITT, it is being adopted internationally as an optical backbone transmission system.
【０００３】従来より、特に地域系伝送システムでは、
局間の伝送速度をＳＤＨ信号の中のＳＴＭ−Ｏ／ＳＴＭ
−１を採用することが多いことが知られている。さらに
これらのシステムでは、伝送路の信頼度を高めるため
に、端局装置間の伝送路を２重化し、それぞれ別ルート
で構成している。またこれらルートの光ファイバ伝送路
数に制約を受ける場合には、多重中間中継装置を配置し
てしてＳＴＭ−Ｏ／ＳＴＭ−１信号のＲ−ＳＯＨのみを
終端し、これら信号をＳＴＭ−４信号等に多重化するこ
とで、伝送路数の制約を回避する技術が知られている。
また上記ＳＤＨ信号を中継する中継装置の状態を転送す
るためにＳＤＨ信号中のＦ１バイトを用い、このＦ１バ
イトの上位２ビットを上記中継装置の状態、下位６ビッ
トに上記中継装置のＩＤを割り当てる技術が知られてい
る。上記ＳＤＨ信号を中継する中継装置の状態を転送す
るためにＳＤＨ信号中のＦ１バイトを用い、このＦ１バ
イトの上位２ビットを上記中継装置の状態、下位６ビッ
トに上記中継装置のＩＤを割り当てる技術が知られてい
る。[0003] Conventionally, especially in a regional transmission system,
STM-O / STM in SDH signal
It is known that -1 is often adopted. Further, in these systems, in order to increase the reliability of the transmission path, the transmission path between the terminal devices is duplicated and each is configured by a different route. When the number of optical fiber transmission lines of these routes is restricted, a multiplex intermediate repeater is disposed to terminate only the R-SOH of the STM-O / STM-1 signal, and the STM-4 by multiplexing the signal or the like, a technique for avoiding the limitations of the transmission path numbers are known.
Also using the F1 byte in the SDH signal in order to transfer the status of the relay device for relaying the SDH signal, the state of the upper 2 bits of the F1 byte the relay device, the ID of the relay device to the lower 6 bits Techniques for assigning are known. A technique for using the F1 byte in the SDH signal to transfer the status of the relay device that relays the SDH signal, assigning the upper 2 bits of the F1 byte to the status of the relay device and the lower 6 bits to assign the ID of the relay device to the lower 6 bits It has been known.
【０００４】[0004]
【発明が解決しようとする課題】上述した従来のＳＤＨ
信号伝送システムでは、送信端局側の多重中間中継装置
でＳＴＭ−Ｏ／ＳＴＭ−１信号をＲ−ＲＯＨのみ終端し
てＳＴＭ−４信号に多重化する場合には、ＳＴＭ−Ｏ／
ＳＴＭ−１信号から受信したＦ１バイト（ＳＴＭ−０の
場合１２個、ＳＴＭ−４の場合４個）をＳＴＭ−４フレ
ームのＲ−ＳＯＨのＮａｔｉｏｎａｌ−Ｕｓｅバイトを
用いて伝送するため、このＳＴＭ−４信号を中間中継す
る中継装置を多重中間中継装置間に配置すると、Ｒ−Ｓ
ＯＨのＮａｔｉｏｎａｌ−Ｕｓｅバイトが上記中継装置
で終端されてしまうので、上記Ｆ１バイトを受信端局側
まで伝送できないという問題があった。The above-mentioned conventional SDH
In the signal transmission system, when the STM-O / STM-1 signal is terminated only by the R-ROH and multiplexed into the STM-4 signal by the multiplex intermediate repeater at the transmitting end, the STM-O /
Since the F1 bytes (12 for STM-0 and 4 for STM-4) received from the STM-1 signal are transmitted using the R-SOH National-Use byte of the STM-4 frame, this STM-byte is used. When a relay device for intermediately relaying four signals is arranged between multiple intermediate relay devices, RS
Since the National-Use byte of the OH is terminated at the relay device, the F1 byte cannot be transmitted to the receiving terminal station.
【０００５】[0005]
【課題を解決するための手段】この発明のＳＤＨ信号伝
送システムにおけるＦ１バイト転送方式は、ＳＴＭ−Ｎ
（Ｎは０を含む正の整数）信号のＲ−ＳＯＨのみを終端
してＳＴＭ−Ｍ（Ｍは整数であり、Ｎ＜Ｍ）信号に多重
化する手段を備える第１の多重中間中継装置と、前記Ｓ
ＴＭ−Ｍ信号を受信して前記ＳＴＭ−Ｎ信号に分離する
手段を備える第２の多重中間中継装置とを含むＳＤＨ信
号伝送システムにおけるＦ１バイト転送方式であって、
前記第１の多重中間中継装置が、前記ＳＴＭ−Ｎ信号か
ら受信した各Ｆ１バイトを順次１フレーム毎に切替選択
して前記ＳＴＭ−Ｍ信号のＦ１バイトとするＦ１バイト
編集手段と、前記ＳＴＭ−Ｍ信号のＦ１バイト内の特定
の１ビットにマルチフレームビットを挿入するマルチフ
レームビット挿入手段とを備え、前記第２の多重中間中
継装置が、前記受信ＳＴＭ−Ｍ信号に含まれるマルチフ
レームビットによりマルチフレーム同期をとるマルチフ
レーム同期手段と、前記マルチフレーム同期に対応して
前記受信ＳＴＭ−Ｍ信号のＦ１バイトを順次前記分離Ｓ
ＴＭ−Ｎ信号のＦ１バイトにマッピングする第１のマッ
ピング手段と、前記マルチ同期が外れた場合には前記受
信ＳＴＭ−Ｍ信号のＦ１バイトをすべての前記分離ＳＴ
Ｍ−Ｎ信号のＦ１バイトにマッピングする第２のマッピ
ング手段とを備えている。The F1 byte transfer method in the SDH signal transmission system of the present invention is based on STM-N.
(N is a positive integer including 0) a first multiplex intermediate repeater having means for terminating only R-SOH of a signal and multiplexing the signal into an STM-M (M is an integer, N <M) signal; , Said S
An F1 byte transfer method in an SDH signal transmission system including a second multiplex intermediate relay device including means for receiving a TM-M signal and separating the signal into the STM-N signal,
An F1 byte editing unit, wherein the first multiplex intermediate relay device sequentially switches and selects each F1 byte received from the STM-N signal on a frame-by-frame basis to make it an F1 byte of the STM-M signal; Multi-frame bit inserting means for inserting a multi-frame bit into a specific one bit in the F1 byte of the M signal, wherein the second multiplex intermediate relay device uses multi-frame bits included in the received STM-M signal. A multi-frame synchronizing means for synchronizing the multi-frame; and an F1 byte of the received STM-M signal sequentially corresponding to the multi-frame synchronization.
First mapping means for mapping the F1 byte of the TM-N signal to the F1 byte of the TM-N signal;
Second mapping means for mapping to the F1 byte of the MN signal.
【０００６】[0006]
【実施例】次に本発明について図面を参照して説明す
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.
【０００７】図１はこの発明において使用されるＳＤＨ
信号中のＦ１バイトの構成の一例を示す図である。FIG. 1 shows the SDH used in the present invention.
FIG. 4 is a diagram illustrating an example of a configuration of an F1 byte in a signal.
【０００８】上記ＳＤＨ信号中のＦ１バイトの上位２ビ
ットは、このＳＤＨ信号を中継する中継装置の状態を示
すビットに割り当てられている。また、Ｆ１バイトの３
ビット目をマルチフレームビットに割り当てている。さ
らに、このＦ１バイトの下位５ビットを中継装置のＩＤ
に割り当てている。なお、マルチフレームは、４本のＳ
ＴＭ−１信号を１本のＳＴＭ−４信号に多重化する場合
には、４マルチフレームでサイクリックなパターン（例
えば１０００等）を選べばよい。[0008] The upper two bits of the F1 byte in the SDH signal are assigned to bits indicating the state of the relay device that relays the SDH signal. Also, 3 of F1 byte
The bit is assigned to a multi-frame bit. Further, the lower 5 bits of the F1 byte are set to the ID of the relay device.
Assigned to. Note that the multi-frame has four S
When multiplexing the TM-1 signal into one STM-4 signal, a cyclic pattern (for example, 1000 or the like) with four multiframes may be selected.
【０００９】図２はこの発明による一実施例の正常状態
における伝送路構成およびＦ１バイトの転送内容（具体
例として、ＳＴＭ−１信号をＳ−ＳＯＨのみ終端してＳ
ＴＭ−４信号に多重伝送する）を示す概念図である。FIG. 2 shows a transmission line structure and F1 byte transfer contents in a normal state according to an embodiment of the present invention (as a specific example, the STM-1 signal is terminated only by the S-SOH and the S1
FIG. 4 is a conceptual diagram illustrating a method of multiplexing transmission on a TM-4 signal.
【００１０】多重中間中継装置１は、送信端局（図示せ
ず）から４本のＳＴＭ−１信号を受ける。これらＳＴＭ
−１信号のＦ１バイトの内容をそれぞれ“Ａ”、
“Ｂ”、“Ｃ”および“Ｄ”とすると、この多重中間中
継装置１は、ＳＴＭ−１信号のＲ−ＳＯＨを終端してＳ
ＴＭ−４信号に多重化し、マルチフレーム、内容
“Ａ”、“Ｂ”、“Ｃ”および“Ｄ”をＳＴＭ−４信号
のＦ１バイトで１フレーム毎に順次転送している。この
ＳＴＭ−４信号を中継する中継装置２（従来技術による
中継装置と同じ機能を有する）は、伝送路が正常状態で
は、ＳＴＭ−４信号のＦ１バイトをそのまま転送する。
受信端局（図示せず）側の多重中間中継装置３は、受信
したＳＴＭ−４信号からＦ１バイトのマルチフレーム同
期をとり、順次分離したＳＴＭ−１信号のＦ１バイトに
上記マルチフレーム同期に対応してＳＴＭ−４信号のＦ
１バイトをマッピングする。[0010] The multiplex intermediate repeater 1 receives four STM-1 signals from a transmitting terminal station (not shown). These STM
The content of the F1 byte of the -1 signal is "A",
Assuming that “B”, “C” and “D”, the multiplex intermediate repeater 1 terminates the R-SOH of the STM-1 signal and
The frame is multiplexed with the TM-4 signal, and the multi-frame, contents "A", "B", "C", and "D" are sequentially transferred frame by frame using the F1 byte of the STM-4 signal. The relay device 2 that relays the STM-4 signal (having the same function as the relay device according to the related art) transfers the F1 byte of the STM-4 signal as it is when the transmission path is normal.
The multiplex intermediate repeater 3 at the receiving end station (not shown) synchronizes F1 bytes of the multi-frame from the received STM-4 signal, and corresponds to the F1 byte of the sequentially separated STM-1 signal in accordance with the multi-frame synchronization. And the F of the STM-4 signal
Map one byte.
【００１１】図３は図２の実施例の中継装置２の入力信
号が断となった状態での伝送路構成およびＦ１バイトの
転送内容を示す概念図である。FIG. 3 is a conceptual diagram showing the configuration of the transmission line and the transfer contents of the F1 byte when the input signal of the relay apparatus 2 of the embodiment of FIG. 2 is cut off.
【００１２】上記中継装置２の入力信号（ＳＴＭ−４信
号）が断となると、中継装置２は、自身の状態を示す内
容“Ｅ”をＳＴＭ−４信号のＦ１バイトにフレームごと
に挿入し、多重中間中継装置３に送信する。このＳＴＭ
−４信号を受信した多重中間中継装置３では、Ｆ１バイ
トのマルチフレーム同期が外れるため、分離した４本の
ＳＴＭ−１信号のＦ１バイトに内容“Ｅ”がマッピング
されている。When the input signal (STM-4 signal) of the relay device 2 is cut off, the relay device 2 inserts the content "E" indicating its own state into the F1 byte of the STM-4 signal for each frame. This is transmitted to the multiplex intermediate repeater 3. This STM
In the multiplex intermediate repeater 3 that has received the −4 signal, the content “E” is mapped to the F1 byte of the four separated STM-1 signals because the multiframe synchronization of the F1 byte is lost.
【００１３】なお、ＳＤＨ信号ＳＴＭ−０をＳＴＭ−４
に多重する場合は、Ｆ１バイトに１２マルチフレームの
構成をとればよい。Note that the SDH signal STM-0 is changed to STM-4
In the case of multiplexing, the F1 byte may have a configuration of 12 multiframes.
【００１４】[0014]
【発明の効果】以上説明したように本発明は、ＳＤＨ信
号の伝送システムにおいて、多重化されたＳＴＭ信号の
Ｆ１バイトのみで多重前の複数のＳＴＭ信号のＦ１バイ
トを転送するので、Ｒ−ＳＯＨを終端する中継装置を用
いても上記ＳＤＨ信号の伝送路を構成できるという効果
がある。As described above, according to the present invention, in the SDH signal transmission system, the F1 bytes of a plurality of STM signals before multiplexing are transferred using only the F1 bytes of the multiplexed STM signals. There is an effect that the transmission path of the SDH signal can be configured even if a relay device terminating the above is used.
【図１】本発明において使用されるＳＤＨ信号中のＦ１
バイトの構成の一例を示す図である。FIG. 1 shows F1 in an SDH signal used in the present invention.
It is a figure showing an example of composition of a byte.
【図２】この発明による一実施例の正常状態における伝
送路構成およびＦ１バイトの転送内容を示す概念図であ
る。FIG. 2 is a conceptual diagram showing a transmission path configuration and F1 byte transfer contents in a normal state according to an embodiment of the present invention.
【図３】図２の実施例の中継装置２の入力信号が断とな
った状態での伝送路構成およびＦ１バイトの転送内容を
示す概念図である。FIG. 3 is a conceptual diagram showing a transmission path configuration and a transfer content of an F1 byte in a state where an input signal of a relay device 2 of the embodiment of FIG. 2 is cut off.
１，３ 多重中間中継装置 ２ 中継装置 1,3 Multiple intermediate repeater 2 Repeater
Claims (3)
号のＲ−ＳＯＨのみを終端してＳＴＭ−Ｍ（Ｍは整数で
あり、Ｎ＜Ｍ）信号に多重化する手段を備える第１の多
重中間中継装置と、前記ＳＴＭ−Ｍ信号を受信して前記
ＳＴＭ−Ｎ信号に分離する手段を備える第２の多重中間
中継装置とを含むＳＤＨ信号伝送システムにおけるＦ１
バイト転送方式であって、 前記第１の多重中間中継装置が、前記ＳＴＭ−Ｎ信号中
のＦ１バイトを前記ＳＴＭ−Ｍ信号中のＦ１バイトで転
送する手段を有し、 前記第２の多重中間中継装置が、前記受信ＳＴＭ−Ｍ信
号のＦ１バイトを前記分離ＳＴＭ−Ｎ信号のＦ１バイト
にマッピングする手段を有することを特徴とするＳＤＨ
信号伝送システムにおけるＦ１バイト転送方式。1. A means for terminating only R-SOH of an STM-N (N is a positive integer including 0) signal and multiplexing it into an STM-M (M is an integer, N <M) signal. F1 in an SDH signal transmission system including a first multiplex intermediate relay device and a second multiplex intermediate relay device including means for receiving the STM-M signal and separating the signal into the STM-N signal
A byte transfer method, wherein the first multiplex intermediate relay device has means for transferring an F1 byte in the STM-N signal with an F1 byte in the STM-M signal; The relay device has means for mapping the F1 byte of the received STM-M signal to the F1 byte of the separated STM-N signal.
F1 byte transfer method in a signal transmission system.
号のＲ−ＳＯＨのみを終端してＳＴＭ−Ｍ（Ｍは整数で
あり、Ｎ＜Ｍ）信号に多重化する手段を備える第１の多
重中間中継装置と、前記ＳＴＭ−Ｍ信号を受信して前記
ＳＴＭ−Ｎ信号に分離する手段を備える第２の多重中間
中継装置とを含むＳＤＨ信号伝送システムにおけるＦ１
バイト転送方式であって、 前記第１の多重中間中継装置が、前記ＳＴＭ−Ｎ信号か
ら受信した各Ｆ１バイトを順次１フレーム毎に切替選択
して前記ＳＴＭ−Ｍ信号のＦ１バイトとするＦ１バイト
編集手段と、前記ＳＴＭ−Ｍ信号のＦ１バイト内の特定
の１ビットにマルチフレームビットを挿入するマルチフ
レームビット挿入手段とを備え、 前記第２の多重中間中継装置が、前記受信ＳＴＭ−Ｍ信
号に含まれるマルチフレームビットによりマルチフレー
ム同期をとるマルチフレーム同期手段と、前記マルチフ
レーム同期に対応して前記受信ＳＴＭ−Ｍ信号のＦ１バ
イトを順次前記分離ＳＴＭ−Ｎ信号のＦ１バイトにマッ
ピングする第１のマッピング手段と、前記マルチ同期が
外れた場合には前記受信ＳＴＭ−Ｍ信号のＦ１バイトを
すべての前記分離ＳＴＭ−Ｎ信号のＦ１バイトにマッピ
ングする第２のマッピング手段とを備えることを特徴と
するＳＤＨ信号伝送システムにおけるＦ１バイト転送方
式。2. A means for terminating only R-SOH of an STM-N (N is a positive integer including 0) signal and multiplexing the signal into an STM-M (M is an integer, N <M) signal. F1 in an SDH signal transmission system including a first multiplex intermediate relay device and a second multiplex intermediate relay device including means for receiving the STM-M signal and separating the signal into the STM-N signal
An F1 byte, which is a byte transfer method, wherein the first multiplex intermediate relay device sequentially switches and selects each F1 byte received from the STM-N signal on a frame-by-frame basis and sets the F1 byte as the F1 byte of the STM-M signal. Editing means; and multi-frame bit inserting means for inserting a multi-frame bit into a specific one bit in the F1 byte of the STM-M signal, wherein the second multiplex intermediate relay device is configured to receive the received STM-M signal. And multi-frame synchronization means for performing multi-frame synchronization by multi-frame bits included in the first and second mappings of the F1 byte of the received STM-M signal to the F1 byte of the separated STM-N signal in response to the multi-frame synchronization. 1 and the F1 byte of the received STM-M signal when the multi-synchronization is lost. F1 byte transfer system in SDH signal transmission system characterized in that it comprises a second mapping means for mapping the F1 byte of the separation STM-N signal.
の多重中間中継装置との間に前記ＳＴＭ−Ｍ信号を中継
する中継装置をさらに含むことを特徴とする請求項２記
載のＦ１バイト転送方式。3. The first multiplex intermediate repeater and the second multiplex intermediate repeater.
3. The F1 byte transfer system according to claim 2, further comprising a relay device for relaying the STM-M signal between the F1 byte and the multiplex intermediate relay device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29502092A JP3102163B2 (en) | 1992-11-04 | 1992-11-04 | F1 byte transfer method in SDH signal transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29502092A JP3102163B2 (en) | 1992-11-04 | 1992-11-04 | F1 byte transfer method in SDH signal transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06152560A JPH06152560A (en) | 1994-05-31 |
| JP3102163B2 true JP3102163B2 (en) | 2000-10-23 |
Family
ID=17815297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29502092A Expired - Fee Related JP3102163B2 (en) | 1992-11-04 | 1992-11-04 | F1 byte transfer method in SDH signal transmission system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3102163B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100342248B1 (en) * | 2000-10-06 | 2002-06-27 | 공비호 | A wavelength division multiplexing system accepting tributary signals with different transmission rates by using time division multiplexing |
-
1992
- 1992-11-04 JP JP29502092A patent/JP3102163B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06152560A (en) | 1994-05-31 |
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