WO2004051898A1 - Channel format setting method and communication apparatus using the same - Google Patents

Abstract

A channel format setting method for setting the channel format of an STS bundle channel in a communication apparatus constituting a ring network, comprising detecting the line alarms of a plurality of connected lines; inserting the path alarm information into all the paths of the lines whose line alarms have been detected; detecting the path alarm information of all the paths of the plurality of lines; detecting the concatenation information of the plurality of connected lines; selecting, based on the path alarm information of all the paths of the plurality of lines, a reception line of the concatenation information; and setting, by use of the concatenation information of the selected reception line, the channel format of the STS bundle channel; whereby an automatic format setting can be surely performed in a UPSR network during occurrence of a failure, and the failure during use of the STS bundle channel in the UPSR network can be recovered.

Description

 Field format setting method and communication device using the same

 The present invention relates to a line format setting method and a communication device using the same, and more particularly, to a line format setting method in a ring network and a communication device using the same. Background art

 In recent years, with the expansion of telecommunications service companies and the demand for diversification of various services, it has become more common for telecommunications line carriers to provide lines to non-communications line carriers. At that time, simply specify the line provided by the line carrier first, and then provide a line (STS pandle line) for automatically recognizing the line format of the main signal without intervening and automatically setting the format. Are increasing.

 Furthermore, as a protection configuration of the network, a ring network configuration such as UPSR (Undirected Path Switch CedRing: unidirectional path switching ring) is currently the mainstream, and the STS pando line There is a growing demand for its application to UP SR networks.

 In the following, the function will be described with reference to an example of a communication HOC-48 (Oticarl Carrier-48) line in SONET (Synchro nous Oticarl Ne twork). For OC-48 lines, set the STS pandle line to one STS-48c line, four STS-12C lines, eighteen STS_3c lines, or a combination of STS-12c and STS-3c. It is possible.

STS bundled lines do not allow different format settings in both directions. In other words, if one line S1-1-1 and the other line S2-1 are set to STS-1 format, line S2-1-1 to line S1-1-1 will be STS-1 Only the setting of one format is allowed, not the setting of STS-3c format. Therefore, it is necessary to preferentially select the concatenation information from one of the lines and set the format.

 Here, the concatenation information is information of a line format. For example, in the case of OC-48, the format is STS-1, STS-3 c STS-12 c, STS-48 c. Therefore, the STS bundle line has a priority setting (config setting) for the receiving line of concatenation information, and the format setting is executed preferentially according to the concatenation information from the configured line. .

 FIG. 1 is a configuration diagram of an example of a communication device having a conventional STS pandle function, and FIG. 2 is a configuration diagram of a software processing function in FIG. In FIG. 1, the concatenation detecting sections 12A and 12B of the communication device 10 concatenate the input signals of the lines S1-1, S2-1 from the pointers in the SOH (Section Overhead) of the input signals. , And notifies the CPU 14 of the detection result.

 In the line alarm detectors 16A and 16B, LOS (Loss Of Signal), LOF (Loss Of Frame), AIS—L (A1 arm Indica tion Signa 1 _ Line) and other line alarms are detected, and the result is reported to the CPU. When each of the cross-connect sections 18A and 18B receives a format setting execution instruction from the CPU 14, it executes the format setting.

 In FIG. 2, as a software process in the CPU 14, the concatenation information receiving line determination unit 20 compares the line alarm states of the lines S1-1 and S2-1, and selects the higher line quality by the selector 22. Select the concatenation information from the line. If there is no line alarm on both lines, or if there is a line alarm on both lines, select the concatenation information of the line (for example, S1-1) set in the confidential system.

The format setting execution processing unit 24 sends a format setting purple instruction to the cross-connect units 18A and 18B in FIG. 1 based on the selected concatenation information. However, in the conventional device that selects the receiving line of the concatenation information by comparing the line alarm status as described above, the following problem occurs when the STS pandle line is applied to the UPSR network.

 FIG. 3 shows a configuration diagram of a UPSR network to which an STS bundle line is applied. In the figure, the underlined lines indicate those that have been set to the confidential mode. Here, in a node such as the node A and the node C which is executing a path switch, the STS bundle line is set between the line S3-1 and the line S1-1 and S2-1.

 In this case, if the configuration settings are set to lines S1-1 and S2-1 on the path protection network, it is necessary to prioritize even between lines SI-1 and S2-1, and the default side of the path switch Have priority.

 Here, if the signal input from line S3-1 of node A changes from STS-1 to STS-3c, if no failure occurs in the network, all nodes The format can be changed normally.

 However, if a failure occurs in the line between nodes A and B, the operation is as follows. At nodes A and D, the format is changed normally. At node B, a line alarm has occurred on line S1-1, so the receiving line for concatenation information switches to line S2-1. Therefore, the format cannot be changed until the format of node C is changed. At node C, AIS-P (Alarm communication gn al-Path) is generated on all paths of line S1-1, but no line alarm is generated, so concatenation 'If The receiving line remains at S1-1—the line format cannot be changed. Therefore, the format could not be changed at Node B and Node C, and there was a mismatch in the format settings in the network, causing the main signal to be interrupted.

Also, 0? —? If (Lossofpointe rp ath) has occurred, there is a risk that normal concatenation information cannot be detected and formatting cannot be performed, or incorrect formatting may be performed. There was a problem that there is. Disclosure of the invention

 The present invention makes it possible to reliably perform automatic setting of a format in a path protection network when a failure occurs, and to provide a circuit format setting method and a line format setting method capable of recovering from a failure when using an STS bundle in a path protection network. It is a general purpose to provide a communication device.

 In order to achieve this object, the present invention provides a line format setting method for setting a line format of an STS bundle line in a communication device constituting a ring network, wherein a line alarm of each of a plurality of connected lines is detected, The path alarm information is inserted into all the paths of the line where the in-alarm is detected, the path alarm information of all the paths of each of the plurality of lines is detected, and the concatenation information of each of the plurality of connected lines is detected. Based on the path alarm information of all paths of each of the plurality of lines, a reception line of concatenation information is selected, and the line format of the STS bundle line is set using the concatenation information of the selected reception line. Is done.

 According to such a line format setting method, it is possible to reliably perform the automatic setting of the format in the UPSR network when a failure occurs, and it is possible to recover from the failure when the STS bundle line is used in the UPSR network. BRIEF DESCRIPTION OF THE FIGURES

 FIG. 1 is a configuration diagram of an example of a communication device having a conventional STS bundle function. FIG. 2 is a configuration diagram of the software processing function in FIG.

 FIG. 3 is a configuration diagram of a UPSR network to which an STS bundle line is applied. FIG. 4 is a configuration diagram of a first embodiment of a communication device having an STS pandle function to which the present invention is applied.

 FIG. 5 is a configuration diagram of the software processing function in FIG.

 FIG. 6 is a configuration diagram of a second embodiment of a communication device having an STS bundle function to which the present invention is applied.

FIG. 7 is a configuration diagram of the software processing function in FIG. FIG. 8 is a configuration diagram of a third embodiment of an apparatus to which the present invention is applied when a slot used for a path protection network is fixed.

 FIG. 9 is a configuration diagram of a fourth embodiment of an apparatus to which the present invention is applied when a slot to be used for a path protection network is not specified.

 FIG. 10 is a configuration diagram of an embodiment of a ring partner line information recognition circuit unit.

 FIG. 11 is a timing chart for explaining automatic detection of ring partner channel information.

 FIG. 12 is a configuration diagram of a fifth embodiment of a communication apparatus having an STS pandle function to which the present invention is applied.

 FIG. 13 is a configuration diagram of the software processing function in FIG.

 FIG. 14 is a configuration diagram of an example of a UPSR network using the communication device of the fifth embodiment as a node.

 FIG. 15 is a configuration diagram of a communication apparatus having an STS bundle function according to a sixth embodiment of the present invention.

 FIG. 16 is a configuration diagram of the software processing function in FIG.

 FIG. 17 is a configuration diagram of an example of a path protection network using the communication device of the sixth example as a node. BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

 FIG. 4 is a block diagram of a first embodiment of a communication device having an STS pandle function to which the present invention is applied, and FIG. 5 is a block diagram of a software processing function in FIG.

In FIG. 4, concatenation detectors 32A and 32B detect concatenation information from Hl and H2 bytes, which are pointers in the SOH in the input signals of lines S1_1 and S2-1, respectively. The result is notified to the CPU 34. The line alarm detectors 36A and 36B detect each line alarm (LOS, LOF, AI SL) for each of the lines S1-1-1 and S2-1-1. When a line alarm is detected, all line paths in the line are detected. Insert AI S_P (Alarm Indication on Signa l—Path). Eighteen-? The detection units 38 and 38B detect the AI_S_P of each line, and notify the CPU 34 of the detection result. Upon receiving the format setting execution command from the CPU 34, the cross connect unit 40 executes the line format setting.

 In FIG. 5, the concatenation information receiving line determination unit 42 determines a line for receiving concatenation information using AIS-P in the STS bundle of both lines S1-1-1 and S2-1. The selectors (SEL) 46 are switched. The AIS of all the paths of the STS bundle of the line S1-1 is ANDed by the AND circuit 43A, and the AIS of all the paths of the STS pandle of the line S2-1 is — P is ANDed by the AND circuit 43 B and supplied to the concatenation information receiving line determination unit 44. The concatenation information receiving line determination unit 44 switches the concatenation information receiving line when AIS-P occurs in all the paths in the STS bundle, and performs the switching in the ATS-P even if there is only one path in the STS bundle. If not, do not switch. If all the paths of both lines are AIS-P, or if all the paths of both lines are not AIS-P, the concatenation information of the confider setting line has priority.

 The format setting execution processing unit 48 notifies the cross connection unit 40 of a format setting execution command according to the concatenation information selected by the selector 46.

 In the present embodiment, by using the AIS-P information of all the paths in the STS bundle to select the receiving line of the concatenation information, the conventional line alarm comparison can be used to select the receiving line of the concatenation information. Even in the case where a failure has occurred in the line between nodes A and B shown in Fig. 3 that could not be performed, node C has AIS-P because all paths in the STS bundle of S1-1 are AIS-P. The receiving line for the concatenation information can be switched to line S2-1, and accurate circuit format can be automatically set even in the UPSR network in the event of damage in Chapter P.

FIG. 6 is a configuration diagram of a second embodiment of a communication device having an STS pandle function to which the present invention is applied, and FIG. 7 is a configuration diagram of a software processing function in FIG. Figures 6 and 7 show Therefore, the same parts as those in FIGS. 4 and 5 are denoted by the same reference numerals.

 In FIG. 6, line alarm detectors 36A and 36B detect line alarms (LOS, LOF, AISL) of lines S1-1 and S2-1, and detect line alarms when a line alarm is detected. Enter AIS-P for all passes. AI S—P detectors 38A and 38B detect AIS—P and notify the CPU 34 of the detection result.

 The concatenation detection sections 32A and 32B in the PTR processing sections 50A and 5OB are concatenated from the H1 and H2 bytes, which are pointers in the SOH of the input signals of the lines S1-1_1 and S2-1. The section information is detected, and the LOP-P detecting sections 51A and 51B detect the LOP-P information of the H1 and H2 bytes, and notify the CPU 34 of the detection results. Upon receiving the format setting execution command from the CPU 34, the cross connect unit 40 executes the line format setting.

 In FIG. 7, in the concatenation information receiving line determination unit 52, the AIS-P information of all the paths in the STS pandle on the lines S1-1 and S2-1 in the end circuits 53A and 53B, respectively. And OR circuits 54A and 54B calculate the logical sum of LOP-P in each STS bundle, and OR circuits 54A and 54B calculate the logical sum of the logical product and logical sum to concatenate It is supplied to the information reception line determination unit 56. The concatenation information receiving line determination unit 56 uses this information to determine the concatenation information receiving line! Switches between /, and selector 46.

 When a LOP-P alarm is generated on any of the paths in the STS pandle, and when an AISP-P alarm is generated on all paths, the concatenation information is selected from the line on which no alarm is generated. If both lines have no alarm or both lines have an alarm, the concatenation information on the configuration setting line has priority.

The status continuation monitoring timer 57 monitors the continuation of the alarm status, and starts the timer when an alarm occurs, and restarts the timer if the alarm is cleared during the timer period. I do. If the alarm is not cleared until the end of the timer period, the selector 46 is switched according to the determination result. During monitoring The interval can be changed by setting the timer time.

 The format setting execution processing unit 48 notifies the format setting execution instruction to the cross-connect unit 40 according to the concatenation information selected by the selector 46.

 In the present embodiment, it is possible to prevent an incomplete format setting at the time of occurrence of LOP-P by determining the reception line of the concatenation information using the LOP-P information in the STS pandle. .

 Also, by monitoring the determination result of the concatenation information selection line with the status continuation monitoring timer 57, except for the LOP-P generated when the line format setting is changed, the concatenation information selection line is determined only by the LOP-P due to a failure. Switching can be performed. This makes it possible to automatically set an accurate line format.

 By the way, it is also possible to perform the concatenation information receiving line determination and format setting by hardware. FIG. 8 is a configuration diagram of a third embodiment of an apparatus to which the present invention is applied when a slot used for an UPSR network is fixed. FIG. 8 shows a configuration for performing add / drop.

 In FIG. 8, in the AND circuits 60A to 60C, the own line (for example, the line S 1—

1), the logical product of the AI SP information of all the paths in the STS bundle at each of the ring partner line (for example, line S2-1) and the cross-connect destination line (for example, line S3-1) is obtained. LOP in each STS bundle at ~ 61 C—

The logical sum of P is obtained, and the logical sum of the logical product and the logical sum is obtained by OR circuits 62A to 62C and supplied to the ALM comparing section 63 as alarm information.

8] The comparing unit 63 determines the receiving line of the concatenation information from the alarm information of the own line, the ring partner line, and the cross-connection destination line for each path, and notifies the selector control unit 64 of it. Here, the LOP-P alarm is generated on any of the paths in the STS bundle, and when the AIS-P alarm is generated on all paths, concatenation information is transmitted from the line without alarm. select. If there is no alarm on all lines or there is an alarm on all lines, priority is given to the concatenation information of the confidential setting line. The timer section 65 starts the timer triggered by the occurrence of the alarm, and stops the timer if the alarm is cleared during the timer period. If the alarm continues during the timer period, the output of the selector control unit 64 is made valid, and the selector control unit 64 receives the output and switches the selector 66 for selecting the reception line of the concatenation information for each path. Execute.

 The format setting unit 67 performs format setting in a cross connect unit (not shown) according to the concatenation information for each path selected by the selector 66. The concatenation information for each path selected by the selector 66 is stored in the hand register 68. The software receives the information in the hardware register 68 and can recognize that the hardware has changed the format setting.

 In the present embodiment, the configuration for realizing the judgment and switching of the receiving line of the concatenation information by hardware in the UPSR network compatible device with fixed slot is implemented by Sft, so that the failure at the time of line format switching in the UPSR network can be avoided. It is possible to recover in a short time.

 FIG. 9 is a configuration diagram of a fourth embodiment of an apparatus to which the present invention is applied when a slot to be used for a path protection network is not specified. The device configuration shown in FIG. 9 is provided for each pass.

 If the slot to be used for the UPSR network is not specified, the path partner line of the UPSR must first be set in the hard register 71. Based on the ring partner line information set in the hard register 71, each of the selectors 70A, 7OB, and 70C selects the concatenation information of the ring partner line from the concatenation information of all paths.

Each of the selectors 72A, 72B and 72C selects the path alarm information in the ring partner line from the alarm information of all paths based on the ring partner line information set in the hard register 71. For the alarm information of each path, the AND circuit 77 calculates the logical product of the AIS-P information of all the paths in each band / layer, and the OR circuit 78 calculates the LOP-P logic of all the paths in each bundle. It is obtained by calculating the sum and taking the logical sum of the logical product and the logical sum in the OR circuit 79. The selector control units 74A, 74B, and 74C provide the alarm information of the own path, the path alarm information in the ring partner line selected by the selectors 76A, 76B, and 76C, and the information of the cross-connect destination path that has been cross-connected. The receiving line of the concatenation information is determined from the alarm information and the configuration setting information, and the selectors 72A, 72B, and 72C are switched.

 Then, based on the concatenation information selected by the selectors 72A, 72B, and 72C, the format setting of the own path is executed, and the hard register 71 is notified.

 By the way, in the equipment configuration for the line on the UPSR drop side, since there is no ring partner line, each of the selectors 76 A, 76 B, and 76 C becomes a high-level output (with alarm), and the selector control units 74 A, 74 B, 74 C Determines the receiving line of concatenation information from the alarm information of its own path, the alarm information of the cross-connected path that has been cross-connected, and the configuration setting information. , 72B, 72C are switched. Since there are two cross-connect destination paths on the door-side path, the logical product of the alarm information of the two paths by the AND circuit 80 is used as the alarm information of the cross-connect destination path.

 At this time, the selector 72C of the drop side path selects either the concatenation information of its own path or the concatenation information switched by the path switch (PSW) 81 of the concatenation information of the two paths at the cross-connect destination. Either is selected.

 In this embodiment, the reception line of the concatenation information is determined by using the path alarm information of the ring partner line set in the hard register 71, the path alarm information of the cross-connected line, and the configuration setting information. Executing and switching makes it possible to determine and switch the receiving line of concatenation information by hardware even in a device where the slot to be used for the UPSR is not specified. It is possible to recover in a short time from a failure when switching the line format.

FIG. 10 is a configuration diagram of an embodiment of a ring partner line information recognition circuit unit. Same figure Among them, ACME 90 and ACMW 92 are memories having slot and path number information cross-connected to each path. ACME 90 corresponds to the path on the west side of the path protection. ACMW92 corresponds to the path on the west side of the path protection. In the ACM information, the east and west information of each path is serially transferred to the path switch (PSW) 94 at the same timing. The path switch 94 selects one of the information, and the cross-connect unit 73 (same as the cross-connect unit shown in FIG. 9) sets the line based on the information. This is the configuration of a conventional UPSR-compatible cross-connect device.

 In the present invention, ring partner line information is automatically detected by hardware from the ACM information. The timing chart shown in FIG. 11 shows an example of detecting the ring destination of slot 1 path 1 in the case of east slot 1, vest slot 2, and drop slot 3.

 The comparison part (COMP E) 97 and the comparison part (COMPW) 98 compare their own slot and path number (slot 1, path 1) with the information of ACME 90 and A CMW 92, and they match. In such a case, a trigger pulse is generated. The logical sum of the logical product of the ACME information and the output of the comparing unit 98 and the logical product of the ACMW information and the logical product of the output of the comparing unit 97 is input to the flip-flop 99 as a hard register. Latched by trigger pulse. The information stored in the flip-flops 99 is the selectors 70A to 70 shown in FIG. And 76 A to 76 are supplied as ring partner line information.

 Here, since slot 1 path 1 is set to ACME 90 of slot 3 path 1, slot 2 path 1 set to ACMW 92 is output as ring partner line information.

 According to the present embodiment, the ring partner line information set in advance in the hardware register 71 in FIG. 9 can be automatically detected from the ACM information by hardware. This eliminates the need to set ring partner line information for all paths, and reduces the size of the hard register.

Also, by simply performing the conventional cross-connect setting first, the STS pandle function can be realized in hardware, and the circuit configuration in the UPSR network can be realized. It is possible to recover from a failure at the time of switching one mat in a short time.

 FIG. 12 is a configuration diagram of a fifth embodiment of a communication device having an STS bundle function to which the present invention is applied, and FIG. 13 is a configuration diagram of a software processing function in FIG. 12 and 13, the same parts as those in FIGS. 6 and 7 are denoted by the same reference numerals.

 In FIG. 12, the concatenation detection unit 32A detects concatenation information from the HI and H2 bits, which are pointers in the SOH of the input signal on line S1-1, and notifies the CPU 100 of the detection result. The line alarm detection unit 36A detects a line alarm (LOS, LOF, AISL) of the line S1-1 and notifies the CPU 100 of the detection result.

 The POH detection unit 102 extracts remote line alarm information from, for example, the Gl byte of the POH (PahtOverHead) of the input signal of the line S1-1 and notifies the CPU 100 of the same. Here, the POH is sent to the next node without termination. Upon receiving the format setting execution command from the CPU 100, the cross connect unit 104 executes the line format setting.

 Upon receiving the notification of the remote line alarm from the CPU 100, the? 011 insertion unit 106 inserts the remote line alarm information into the GOH bit of the POH of the output signal of the line S2-1. The same configuration is provided for the direction from line S2-1 to line S1-1 in the same way.

 In FIG. 13, an AND circuit 105 calculates the logical product of the line alarms LO S, LOF, and AI S_L of the line S 1-1, and an AND circuit 106 calculates the line alarms LOS, LOF, AIS—L of the line S 2-1. AND operation of POH processing unit 1

Supply to 07.

 The 0 ^ 1 processing unit 107 outputs the line alarm LOS, LOF, A of the line S1-1.

When the logical product of 1 SL is at the noy level, the remote line alarm information for line S2-1 is generated and notified to the POH insertion unit 106 of the cross-connected path, and the line alarm for line S2-1 is generated. When the logical product of LOS, LOF, and AISL is high, remote line alarm information for line S1-1 is generated and cross-connected to notify the POH input section of the destination path.

The concatenation information receiving line determination unit 108 is equivalent to the POH detection unit 102, Based on the remote line alarm information of the two lines S1-1 and S2-1, the logical product of the line alarms from AND circuits 105 and 106, and the judgment of the reception line of concatenation information, The selector 46 is switched. Here, if a remote line alarm or a line alarm occurs on one of the lines, concatenation information on the line without an alarm is received. When a remote line alarm or a line alarm occurs on both lines, and when there is no both line alarm, the configuration setting line has priority.

 The format setting execution processing section 48 notifies the format setting execution instruction to the cross-connect section 104 and the like according to the concatenation information selected by the selector 46.

 FIG. 14 is a configuration diagram of an embodiment of a UPSR network using the communication device of the fifth embodiment as a node. In the figure, the underlined lines indicate those that have been set to the conveyer setting. The circled numbers in the figure correspond to the step numbers.

 (1) A fault occurs on the line between nodes A and B.

 (2) A line alarm LOS is generated on line S1-1 of node B.

 (3) Node B that detects a line alarm on line S1-1 sends out line alarm information using the POH in the STS bundle of line S2-1. (4) The node C switches the concatenation information receiving line from the line S111 which is set as the confeder to the line S2-1 according to the line alarm information of the POH from the line S1-1. The format is changed based on the information. (5) Node C transmits the line alarm information on the POH in the STS bundle of line S3-1.

 FIG. 15 is a configuration diagram of a sixth embodiment of a communication device having an STS bundle function to which the present invention is applied, and FIG. 16 is a configuration diagram of a software processing function in FIG. In FIGS. 15 and 16, the same parts as those in FIGS. 12 and 13 are denoted by the same reference numerals.

In FIG. 15, the concatenation detection unit 32A detects concatenation information from the Hl and H2 bits, which are pointers in the SOH of the input signal on line S1_1. The CPU 110 is detected, and the detection result is notified to the CPU 110. The line alarm detector 36A detects a line alarm (LOS, LOF, AISL) of the line S1-1 and notifies the CPU 110 of the detection result.

 The POH detector 112 extracts concatenation conversion information from the POH of the input signal of the line S1-1, for example, G1 bit, and notifies the CPU 110 of the extracted information. Here, the POH is sent to the next node without termination. Upon receiving the format setting execution command from the CPU 110, the cross connect unit 114 sets the line format.

 Upon receiving the notification of the concatenation change information from the CPU 110, the POH input unit 116 inserts the concatenation change information into the G1 byte of the POH. The same configuration is provided for the direction from line S2-1 to line S1-1 in both directions.

 In FIG. 16, the concatenation information receiving line determination unit 117 determines the receiving line of concatenation information based on the concatenation change information, line alarm, and the con? Guration setting information of both lines, and switches the selector 46. Do. In this case, the priority concatenation information is received from the line receiving the concatenation change information. However, if concatenation change information is received from both lines, the confederation setting line has priority.

 When a line alarm has occurred, the concatenation information receiving line determination unit 117 receives concatenation information from a line where no alarm has occurred. If a line alarm occurs on both lines, ¾ ぴ If there is no line alarm, give priority to the confider setting line.

 In accordance with the concatenation information selected by the selector 46, the format setting execution processing section 48 notifies the format setting execution instruction to the cross-connect section 116, and also inputs the POH input section 116 of the path in the STS bundle whose format setting has been changed. Of the concatenation change information.

FIG. 17 is a configuration diagram of an embodiment of a path protection network using the communication device of the sixth embodiment as a node. In the figure, the underlined lines indicate those that have been set to the conveyer setting. The circled numbers in the figure correspond to the step numbers I do.

 (1) A fault occurs on the line between nodes A and B.

 (2) The input signal format of line 3-1 of node A changes from STS-1 to STS-3c.

 (3) Node A changes the line format of its own node, and sends concatenation change information indicating that concatenation information has changed in the STS pandle in the STS pandle of lines S1-1 and S2-1. Send on POH.

(4) Node D changes the format from the concatenation information of line S2-1 as it is because the confi- der setting is originally line S2-1, and overwrites the concatenation change information of POH to the line. Send to S1-1.

(5) Node C switches the receiving line of concatenation information to line S2-1 to receive the concatenation transformation information from line S2-1, and changes the format based on the concatenation information. Do.

 (6) Here, node B does not receive the concatenation change information due to the disconnection of the receiving line, and the line format is not changed.Therefore, node C remains in STS_1 without changing the line format of node B. , Line set to confider

The concatenation information from S1-1 cannot change the line format. However, since the concatenation change information is received from line S2-1, node C can switch the concatenation information reception line to S2-1, and based on that information, changes the line format to STS-3c. Can be changed to Further, the node C overwrites the concatenation change information of the POH and transmits it to the line S3-1.

 In this way, the node that has changed the line format sends out the concatenation change information using the POH, and preferentially uses the concatenation information of the line that received the concatenation change information. By changing the line format, it is possible to automatically set the correct line format even in the UPSR network when a failure occurs.

As described above, according to the present invention, the line alarm information of each line, the status of LOP-P of all paths in the STS bundle, and the state of AIS-P of all paths are compared, and concatenation is performed. By selecting the receiving line of the application information, it is possible to reliably perform the automatic setting of the format in the UPSR network when a failure occurs, and to recover from the failure when using the STS pandle line in the UPSR network. In addition, by transmitting remote line alarm information or concatenation change information using the POH in the STS pandle line, and using that information to select the concatenation information receiving line, the UPSR at the time of failure can be selected. It is possible to reliably perform the automatic setting of the format on the network, and it becomes possible to recover from a failure when using the STS panddle circuit in the UPSR network. Furthermore, the circuit configuration that realizes the judgment and switching processing of the concatenation information receiving line by hardware reduces the time required to automatically set the format of the entire network, and obstructs the change of the line format in the UPSR network. From a short time.

 From the above, it is possible to provide an STS panddle line that can be restored reliably and in a short time due to a failure when changing the circuit format in the UPSR network, and an STS pandle line with a highly reliable failure recovery function Providing a compatible device is edible.

 By the way, in the S / R station such as nodes B and D in Fig. 14, one con- ductor setting is set for one cross connect. In addition, an ado such as nodes A and C. For the drop station, one for each of the two cross-connects (between lines S1-1 and S3-1 and between lines S2-1 and S3-1) Since the configuration settings are used, the same settings are applied to S1-1, S2-1, and S3-1 simultaneously. In the configurations shown in Fig. 4 and Fig. 6, cross-connects are performed in the through stations such as nodes B and D because the alarm information of lines S1-1 and S2-1 is compared and the switches are switched. It is possible to consider that is set between lines S1-1 and S2-1. In the configurations shown in Figs. 12 and 15, the through station has the configuration shown in Figs. 12 and 15 in both directions of lines S1-1 and S2-1, and compares the alarm information in both directions with the configuration. Switch.

Note that the present invention is not limited to SONET, but is also applicable to SDH (Synchronous Digit 1 Hierarchy). The line alarm detectors 36A and 36B correspond to the claimed line alarm detector, the AISP detectors 38A and 38B correspond to the path alarm detector, and the concatenation detector. 32A and 32B correspond to the concatenation information detecting means, and the concatenation information receiving line determination sections 42, 52, 108, 117, the selector 46 and FIGS. 8 and 9 correspond to the concatenation information receiving line selecting means. The LOP-P detectors 51A and 5IB correspond to the pointer loss detection means, the status continuation monitoring timers 57 and 65 correspond to the timer means, and the ACME90 and A CMW 92 correspond to the storage means. The POH input unit 106 corresponds to a remote alarm information insertion unit, the POH detection unit 102 corresponds to a remote alarm information detection unit, the POH input unit 116 corresponds to a concatenation conversion information insertion unit, and the POH detection unit. 112 is Corresponding to Kachineshiyon change information detecting means.

Claims

The scope of the claims 1. In a line format setting method for setting a line format of an STS bundle line in a communication device configuring a ring network,  Detects a line alarm for each of the connected lines, and sends pass-through alarm information to all paths of the line where the line alarm is detected.  Detect path alarm information of all paths of each of multiple lines,  Detects the concatenation information of each of a plurality of connected lines, and selects the receiving line of the concatenation information based on the path alarm information of all the paths of each of the plurality of lines.  A line format setting method for setting a line format of the STS bundle line using concatenation information of a selected reception line. 2. In a line format setting method for setting a line format of an STS pandle line in a communication device constituting a ring network,  Detect line alarms of each of the connected lines, enter pass alarm information to all paths of the line where the line alarm was detected,  Detect path alarm information of all paths of each of multiple lines,  Detects pointer loss for each pass of each of multiple lines,  Concatenation information of each of the plurality of connected lines is detected, and a reception line of the concatenation information is selected based on the path alarm information of all the paths of each of the plurality of lines and the lost pointer information of each path. ,  A line format setting method for setting a line format of the STS pandle line using concatenation information of a selected reception line. 3. In the line format setting method of setting the line format of the STS pandle line in the communication device configuring the ring network, Detects line alarms for each of the connected lines, and Insert path alarm information into all paths of the line where the  When the line alarm is detected, the remote alarm information is inserted into the overhead information and transmitted to the connected line,  Detecting remote alarm information of each of the plurality of connected lines; detecting concatenation information of each of the plurality of connected lines; and path alarm information of all paths of each of the plurality of lines and the plurality of lines. Based on each remote alarm information, select the concatenation information receiving line,  A line format setting method for setting a line format of the STS bundle line using concatenation information of a selected reception pin. 4. In the line format setting method for setting the line format of the STS pandle line in the communication device configuring the ring network,  Detects line alarms of each of the connected lines, inputs pass alarm information to all paths of the detected line alarm,  Detecting concatenation change information of each of the plurality of connected lines; detecting concatenation information of each of the plurality of connected lines; and detecting path alarm information of all paths of each of the plurality of lines and the plurality of lines. Based on each concatenation change information, select a concatenation information reception line,  A line format setting method for inserting concatenation change information into overhead information and transmitting the line to the connected line when the line format of the STS pandle line is set using the concatenation information of the selected reception line . 5. A communication device that configures a ring network and sets the STS Pandre times and line fountain format! /,hand, Detects line alarms for each of the connected lines, and Line alarm detection means for inserting pass alarm information into all paths of the line where the  Path alarm detection means for detecting path alarm information of all paths of each of the plurality of lines;  Concatenation information detecting means for detecting concatenation information of each of the plurality of connected lines;  tfff has a concatenation it receiving line selecting means for selecting a receiving line of concatenation information based on path alarm information of all paths of each of the plurality of lines,  A communication device for setting a line format of the STS bundle line using concatenation information of a selected reception line. 6. In a communication device that configures a ring network and sets the line format of the STS pandle line,  A line alarm detecting means for detecting a line alarm of each of the plurality of connected lines and inputting path alarm information to all paths of the line where the line alarm is detected;  Path alarm detection means for detecting path alarm information of all paths of each of the plurality of lines;  A Vointer loss detection means for detecting the loss of Vointer in each pass of each of the plurality of lines;  Concatenation information detecting means for detecting concatenation information of each of the plurality of connected lines;  ttflB Concatenation information receiving line selecting means for selecting a concatenation information receiving line based on the path alarm information of all paths of each of the plurality of lines and the pointer loss information of each path, A communication device for setting a line format of the STS bundle line using concatenation information of a selected reception line. 7. In the communication device according to claim 6,  Timer means for measuring a period of Vointer elimination of each path of each of the plurality of lines and, when the Vointer erasure period exceeds a predetermined value, selecting a receiving line of concatenation information by the concatenation information receiving line selecting means. Communication device. 8. In the communication device according to claim 6 or 7,  A communication device in which a slot used for a one-way path switching ring among the slots of the plurality of lines is fixed. 9. In the communication device according to claim 6,  The slot used for the one-way path switching ring among the slots of the plurality of lines is not specified,  Having storage means for storing ring partner line information of each of the plurality of lines,  The concatenation information receiving line selection means selects a concatenation information receiving line based on path alarm information of all paths of a plurality of lines selected based on the ring partner line information and pointer loss information of each path. Communication device. 10, The communication device according to claim 9,  A communication device for generating ring partner line information for each of the plurality of lines using memory information used for cross-connect setting. 1 1. In a communication device that configures a ring network and sets the line format of an STS band  A line alarm detecting means for detecting a line alarm of each of the plurality of connected lines, and inserting path end alarm information into all paths of the line where the line alarm is detected; A remote alarm when a line alarm is detected by the line alarm detection means; Remote alarm information insertion means for inputting the system information into the overhead information and sending it to the connected line;  Remote alarm information detecting means for detecting remote alarm information of each of a plurality of connected lines;  Concatenation information detecting means for detecting concatenation information of each of the plurality of connected lines;  Concatenation information receiving line selecting means for selecting a receiving line of concatenation information based on path alarm information of all paths of each of the plurality of lines and remote alarm information of each of the plurality of lines,  A communication device for setting a line format of the STS pandle line using concatenation information of a selected reception line. 1 2 · In a communication device that configures a ring network and sets the line format of the STS bundle line,  A line alarm detecting means for detecting a line alarm of each of the plurality of connected lines and inserting path alarm information into all paths of the line where the line alarm is detected;  Concatenation change information detecting means for detecting concatenation change information of each of the plurality of connected lines;  Concatenation information detecting means for detecting concatenation information of each of the plurality of connected lines;  Concatenation information receiving line selecting means for selecting a concatenation information receiving line based on path alarm information of all paths of each of the plurality of lines and concatenation change information of each of the plurality of lines;  When the line format of the STS bundle is set using the concatenation information of the selected reception line, the concatenation change information is inserted into the overhead information and transmitted to the connected line. Change information insertion means  Having a communication device.