JP2677198B2 - Wireless communication system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio communication system, and more particularly to a radio communication system having a plurality of working lines. A first terminal multiplexing method for terminating and multiplexing, terminating and multiplexing all of the section overhead,
In addition, the present invention relates to a wireless communication system in which a second termination multiplex system for changing over to a synchronous network clock signal is mixed for each line and a protection line is shared at the time of line switching.

[0002]

2. Description of the Related Art A broadband service integrated digital network (B-
To realize the ISDN (Broadband aspects of ISDN), the International Telegraph and Telephone Consultative Committee (CCITT) has established a Synchronous Digital Hierarchy (SDH) as an internationally unified digital hierarchy.
tal Hierarchy) has been standardized (CCITT recommendation G.
707-G. 709).

According to this recommendation, there are three AU-3s (Administrative Units) with a transmission rate of 50 Mbps and a section overhead (SOH: Section Ov).
Synchronous Transport Module Level 1 (STM-1) comprising SAU added to AU-4 having a transmission rate of 150 Mbps.
A multiplexed signal having a transmission rate of 150 Mbps called le Level 1) is used as a reference interface.

As a multiplexing device for transmitting the STM-1 signal or an STM-N signal obtained by multiplexing the STM-1 signal, a standard multiplexing device as shown in FIG. 782). Note that N is 1
Since these are natural numbers and the STM-1 signal is included in the STM-N signal, the STM-1 signal including the STM-1 signal will be described below.
-N signal.

In FIG. 8, two STM-N signals input via a transmission line are SDH physical interface (SPI) circuits 81a and 81a, respectively.
RST unit (RST: Regenerator Sectio
n Termination) 82a, 82b terminates a part of RSOH of SOH, and then MST section (MST: Multiple
x Section Termination) 83a, 83b terminates the remaining MSOH of the SOH, and the MSP part (MSP: Multiple
x Section Protection) 84, and redundant system switching of multiplex section (MS: Multiplex Section) is performed here.

The output signal of the MSP section 84 is the SA circuit (S
A: Section Adaptation) 85 is used to transfer to the synchronous network clock signal and pointer processing of AU-3 or AU-4 (hereinafter referred to as AU-3 / 4 pointer processing) is performed, and then via MSP unit 86. Is input to the MST unit 87, where a part of the SOH MSOH is multiplexed, and the RST unit 88 at the next stage further inputs the remaining SOH RSOH.
After being subjected to the multiplex processing, the STM-N signal is transmitted to the transmission line via the SPI circuit 89. In addition,
By the above pointer processing of AU-3 / 4, three or one virtual
A pointer value is set so as to point to the beginning position of a container (VC: Virtual Container). This pointer is included in the SOH.

According to this multiplexing device, all of the SOHs contained in the input STM-N signal are terminated and multiplexed, and
A transfer to a synchronous network clock signal is performed (this multiplexing method is referred to as an MST termination multiplexing method).

As another device for transmitting an STM-N signal, a standard relay device as shown in FIG. 9 has been proposed (CCITT recommendation G.958). In the figure, an STM-N signal input via a transmission path is an SPI
It is sequentially supplied to the RST units 92 and 93 via the circuit 91, where only a part of RSOH of SOH is terminated and multiplexed, and then sent out to the transmission line via the SPI circuit 94. According to this relay device, only a part of the SOH included in the STM-N signal is terminated and multiplexed (this multiplexing method is referred to as RST termination multiplexing method). Therefore, conventionally, the above-mentioned two termination multiplexing methods, the MST termination multiplexing method and the RST termination multiplexing method, may coexist.

FIG. 10 is a block diagram showing an example of a conventional wireless communication system in which the above-mentioned two termination multiplexing systems are mixed and a protection line is shared. This conventional method uses the wireless transmission terminal 3
00 and a wireless receiving terminal 320. The wireless transmission terminal station 300 includes an RST wireless transmission terminal unit 305 including an RST termination circuit 301, a wireless multiplexing processing circuit 302, a transmission switching circuit 303, and a standby wireless multiplexing processing circuit 304, MST termination circuits 306a and 306b, and a wireless multiplexing processing circuit 307. ,
It is composed of an MST wireless transmission end unit 311 including an MSP unit 308, a transmission switching circuit 309, and a standby wireless multiplexing processing circuit 310, and a switching circuit 312.

On the other hand, the wireless receiving terminal 320 has the reception distribution circuit 3
21, an RST radio receiving end 326, and an MST radio receiving end 331. Among them, the RST radio receiving end portion 326 is used for the RST radio termination processing circuit 322, R.
Preliminary wireless termination processing circuit 323 for ST, distribution circuit 324
a and 324b, and an RST multiplexing circuit 325. Further, the MST wireless receiving end 331 is
Preliminary radio termination processing circuit 327, distribution circuits 328a and 328b, MST radio termination processing circuit 329, MS
It is composed of T multiplex circuits 330a and 330b.

The RST radio transmission terminal 3 in the radio transmission terminal station 300
Reference numeral 05 denotes an STM-N signal 31 in the relay section (RS) section which is RST terminated by the RST termination circuit 301, and the RST terminated signal 401 is RST terminated by the wireless multiplexing processing circuit 302 for RST. The section overhead (RSOH) for the wireless section accessed at is subjected to multiplexing processing and output as the working wireless signal 41.

Further, the RST radio transmission end unit 305 selects a signal 401 which has been subjected to RST termination processing for the standby system by the transmission switching circuit 303 during the preliminary switching control and outputs it as the standby signal 402 for the standby wireless multiplexing processing for RST. In the circuit 304, the section overhead RSOH is multiplexed and output as a preliminary radio signal 403.

For the STM-N signals 32 and 32 'in the multiple section (MS) section having the redundant configuration, the MST wireless transmission end unit 311 in the wireless transmission end station 300 is provided.
By the MST termination circuits 306a and 306b.
Termination is performed, and signals MST terminated 404 and 404 ′ are output, respectively, and the wireless multiprocessing circuit 307 for MST is used.
In the above, redundant system switching, synchronization network clock signal transfer and AU-3 / 4 pointer processing, section overhead (MSOH) multiplexing processing for wireless sections accessed by the MST termination multiplex system, and further for wireless section RS
The OH multiplex processing is performed, and the active radio signal 42 is output.

On the other hand, regarding the standby system, the MST wireless transmission end unit 311 uses the MST termination circuits 306a and 306b for MS.
The T-terminated signals 404 and 404 'are transferred to the MSP unit 308.
The redundant system switching of the MS section is performed by the above, and the STM-N signal 405 that is terminated and obtained after the switching is selected is supplied to the transmission switching circuit 309 to be selected during the preliminary switching control and output as the preliminary signal 406. Let me

Further, the MST wireless transmission end unit 311 sends the above-mentioned spare signal 406 to the MST spare wireless multiplex processing circuit 310.
And the auxiliary network signal is transferred to the synchronous network clock signal, the pointer processing of AU-3 / 4, the wireless section MSOH multiplex processing, and the wireless section RSOH multiplex processing are performed respectively to generate the standby wireless signal 407. Output. Switching circuit 3
12, the backup radio signal 407 is supplied together with the backup radio signal 403 from the RST radio transmission end unit 305. One of the backup radio signals 407 is selected by the backup switching control.
Output as 3.

The radio receiving end station 320, which is opposed to the radio transmitting end station 300 having the above-mentioned configuration, supplies the backup radio signal 43 to the reception distribution circuit 321, where the signals 408 and 408 'are supplied to the radio receiving terminal 320.
It is distributed and supplied to the RST radio receiving end 326 and the MST radio receiving end 331, respectively. RST radio receiving end 32
6 performs the RST termination of the reception distribution signal 408 by the standby radio termination processing circuit 323, and thereby outputs the synchronization switching standby synchronization signal 409 and the system switching signal 410 to the distribution circuits 324a and 324b, respectively. Each of the distribution circuits 324a and 324b is R for the working line.
The ST synchronization signal 411 and the signal 413 are output.

Further, the RST radio receiving end section 326 receives the active radio signal 41 by the radio termination processing circuit 322, and R
When the ST termination is performed and the synchronization is switched, the RST synchronization signal 411 is input from the distribution circuit 324a, the synchronization is switched by the synchronization switching control signal, and the terminated signal 412 is output to the RST multiplexing circuit 325. RST multiplexing circuit 32
5 receives this signal 412 and the protection line signal 413 from the distribution circuit 324b as input signals, selects one based on the system control signal at the time of system switching, multiplexes RSOH, and STM-N of RS section. Signal 45
Is output.

On the protection line side of the MST radio receiving end 331, a signal 408 'obtained by receiving and distributing the backup radio signal 43 by the reception distribution circuit 321 is MST terminated by the backup radio termination processing circuit 327, Thus, the system switching signal 415 after the MST termination synchronization switching preliminary synchronization signal 414 and the synchronization network clock signal are transferred and the AU-3 / 4 pointer processing is performed is output.

Distribution circuits 328a and 328b are supplied with a synchronization switching backup synchronization signal 414 and a system switching signal 415, respectively, and output MST synchronization signal 411 and signals 417 and 417 'to the working line, respectively.

On the other hand, on the working line side of the MST wireless receiving end 331, the working wireless signal 42 is received by the wireless termination processing circuit 329 to perform MST termination, and the MST synchronization signal 411 is input from the distribution circuit 328a at the time of synchronization switching. Then, the synchronization switching control signal is used to perform the synchronization switching, and further, the switching to the synchronization network clock signal and the AU-3 / 4 pointer processing are performed to generate the terminated signals 418 and 418 ', respectively, to generate the MST multiplexing circuit 330a. And 330b.

In the duplexed MST multiplexing circuits 330a and 330b, the above signals 418 and 418 'are input to one input terminal and the other input terminal is divided into two by a distribution circuit 328b from the protection line. Signals 417, 41
7'is input, and when the system is switched, the signal 417 or 418 or 417 'or 418' is selected by the system control signal to multiplex MSOH and RSOH, respectively.
The STM-N signals 48 and 48 'in the MS section are generated and output.

[0022]

However, in the above-mentioned conventional wireless communication system, since the working circuit of the RST termination multiplex system and the working line of the MST termination multiplex system have different termination circuits and multiplex circuits, respectively, the SPI circuit is used. However, since it is difficult to share the circuit because it is difficult to share the circuit, it is necessary to separately have a spare circuit (304, 323) for the RST termination multiplex system and a spare circuit (310, 327) for the MST termination multiplex system. And the radio channel can only be shared.

Moreover, when the extension is carried out, the extension can be made only in the form of addition to each termination multiplexing system. Therefore, conventionally, when the working line of the MST termination multiplexing system is changed to the working line of the RST termination multiplexing system. On the contrary, when changing the working line of the RST termination multiplex system to the working line of the MST termination multiplex system, the circuits should be replaced with each other, or the two termination multiplexing systems should be considered and physically terminated. Since it is necessary to mount a pair of multiple circuits in the same unit, there is a problem in that the efficiency is very low both economically and in terms of mounting.

The present invention has been made in view of the above points,
It is an object of the present invention to provide a wireless communication system that can easily cope with a change of the working line even when working lines of different termination multiplex systems are mixed and can share a protection line at the time of line switching.

[0025]

In order to achieve the above-mentioned object, the present invention provides a wireless transmission terminal station comprising a working line transmission end connected to a plurality of working lines and a protection line transmission end, Maintenance management information at the wireless transmission end station and the wireless reception end station, which consists of a wireless reception end station consisting of a working line reception end and a protection line reception end that face the line transmission end and the protection line transmission end, respectively. Of the working line for transmitting the maintenance management information and data by the first termination multiplexing method for terminating and multiplexing only a part of the above, and for terminating and multiplexing all of the maintenance management information and transferring to the synchronous network clock signal. The working line for transmitting the maintenance management information and the data is mixed in the second termination multiplexing method to be performed,
In a wireless communication system in which a working line of the first termination multiplexing system and a working line of the second termination multiplexing system share a protection line at the time of line switching, a working line sending end, a protection line sending end, and a working line receiving end The part and the protection line receiving end are configured as follows.

That is, the working line transmission end section shows that the multiplexed signal in which the data and the maintenance management information are multiplexed is terminated by the first termination multiplexing method and is terminated by the first termination multiplexing method. A first termination circuit that outputs the first circuit information and a second circuit information that indicates that the multiplexed signal is terminated by the second termination multiplexing method and that is terminated by the second termination multiplexing method. A plurality of second termination circuits,
The output signal of the first terminating circuit and the first circuit information are input, and based on the first circuit information, the multiplex processing circuit unit based on the first termination multiplex system is selectively used for multiplex processing and transmitted. The first wireless multiplex processing circuit has the same circuit configuration as the first wireless multiplex processing circuit, and the output signals of the plurality of second termination circuits and the second circuit information are commonly input to the second wireless multiplex processing circuit and the second wireless multiple processing circuit. And a second wireless multiplex processing circuit for performing multiplex processing by selectively using a multiplex processing circuit unit based on the second termination multiplex system based on circuit information.

Further, the backup line transmission end section includes a switching selection section for switching and selecting each output signal of the plurality of second termination circuits, and a first selection section.
Receiving the output signal of the terminating circuit, the first circuit information, the output signal of the switching selection unit, and the second circuit information as input signals,
The transmission switching circuit that selects the working line to be parallelized at the transmission end according to the preliminary switching control information and outputs the preliminary signal and the preliminary information, and the first and second wireless multiplexing processing circuits have the same circuit configuration, On the basis of this, a third wireless multiplex processing circuit which multiplexes and transmits the preliminary signal by selectively using the multiplex processing circuit section based on the first or second termination multiplex system.

Further, the working line receiving end receives the signal transmitted from the first wireless multiplexing processing circuit, and based on the third circuit information from the outside, the termination processing circuit based on the first termination multiplexing method. And a first wireless termination processing circuit for terminating a received signal by selectively using a section and performing synchronous switching to the first synchronization switching signal of the first termination multiplex system, and the same as the first wireless termination processing circuit A circuit configuration, which receives a signal transmitted from the second wireless multiplexing processing circuit, and selectively uses a termination processing circuit unit based on the second termination multiplexing method based on fourth circuit information from the outside. while terminating the receive signal, the second
Second wireless termination processing circuit for performing synchronous switching to the second synchronization switching signal of the terminal multiplexing method of No. 3, the output signal of the first wireless termination processing circuit and the first system switching signal are input, and the input signal is input. And a second multiplexing circuit that outputs the information indicating that the multiplexing is performed by the first termination multiplexing method as the third circuit information, while switching The output signal of the wireless termination processing circuit and the second system
System switching signal is input and the input signal is switched to the second
And a plurality of second multiplex circuits for outputting the information indicating that the multiplex has been performed by the second terminal multiplex system as the fourth circuit information.

Further, the protection line receiving end is composed of the third and fourth
Circuit information is input, and a selection circuit for selecting the termination line multiplexing method of the protection line at the time of line switching by the protection switching control information,
The circuit configuration is the same as that of the first and second wireless termination processing circuits, the backup signal transmitted from the third wireless multiplexing processing circuit is received, and the first or the second wireless termination processing circuit is received based on the circuit information from the selection circuit. A third wireless termination processing circuit that performs termination processing by a termination multiplexing method and outputs a synchronization switching signal and a system switching signal to the working line, respectively, and a third wireless termination processing circuit.
A first distribution circuit for distributing output synchronizing switching signal as the first and second radio termination first and second to the circuit of the synchronizing switching signal from cis from the third wireless termination circuit < Bringing the tem switching signal to the first and second multiplexing circuits, first and second
And a second distribution circuit that distributes and outputs as a system switching signal .

[0030]

According to the present invention, the first to third radio multiplex processing circuits in the radio transmission terminal station are the first to third circuits from the first and second termination circuits.
Also, since all or part of the circuit section is selectively used based on the second circuit information or the preliminary information from the transmission switching circuit, either the first or the second termination multiplexing method is used for the multiplexing processing. In the case of doing so, a common circuit can be used. Similarly, based on the circuit information from the selection circuit, the first to third wireless termination processing circuits in the wireless receiving end station based on the third and fourth circuit information from the first and second multiplexing circuits, Since all or part of the circuit section is selectively used, the circuit configurations of the first to third wireless termination processing circuits can be made common.

This circuit configuration is commonly used in the wireless communication system in which the synchronous transmission module signal having the section overhead defined by the synchronous digital hierarchy as the maintenance management information is transmitted and received. The circuit section that carries out the transfer to the synchronous network clock signal is invalidated by the first circuit information, and the second wireless multiplexing processing circuit sets the circuit section that carries out the transfer to the synchronous network clock signal according to the second circuit information. Valid, the third wireless multiplexing processing circuit selects the use of the circuit section for transferring to the synchronous network clock signal based on the output preliminary information of the transmission switching circuit, and the first wireless termination processing circuit selects the synchronous network clock signal. The circuit unit that carries out the transfer to the signal is invalidated by the third circuit information, and the second wireless termination processing circuit carries out the transfer to the synchronous network clock signal. The path portion is validated by the fourth circuit information, and the third wireless termination processing circuit realizes the use of the circuit portion for transferring to the synchronous network clock signal based on the circuit information from the selection circuit. be able to.

Further, according to the present invention, the physical information of the terminal multiplex system of the working line is provided to each of the third wireless multiplex processing circuit and the third wireless termination processing circuit of the protection line during switching control.
Since the transmission switching circuit and the selection circuit are used to select the use of the required circuit section, the third wireless multiplexing processing circuit and the third wireless termination processing circuit are provided in the first and second wireless processing circuits.
In either case of the termination multiplex system, it can be commonly used.

[0033]

Next, an embodiment of the present invention will be described. FIG. 1 shows a configuration diagram of an embodiment of the present invention. In FIG.
The same signal is given the same reference numeral. As shown in FIG. 1, this embodiment is based on CCITT Recommendation G. 707-
G. FIG. This is an example applied to a system for wirelessly transmitting and receiving STM-N signals conforming to 709, and comprises a wireless transmitting end station 10 and a wireless receiving end station 20 facing each other.

The radio transmission terminal station 10 comprises a working line transmission end portion 15 and a protection line transmission end portion 19. The working line sending end portion 15 is an RST termination circuit 11 and an M connected to the working line.
It is composed of an ST termination circuit 12a, an MST termination circuit 12b connected to a protection line, and first and second wireless multiplex processing circuits 13 and 14, and the lines in the RS section and the MS section are mixed.

The protection line sending end 19 is composed of a transmission switching circuit 16, an MSP unit 17 and a radio multiplex processing circuit 18, and realizes a common protection line for the RS section and the MS section. Here, as will be described later, the wireless multiple processing circuits 13, 1
4 and 18 have the same circuit configuration, but different circuit parts are used.

On the other hand, the radio receiving end station 20 which receives the radio signal from the radio transmitting end station 10 is composed of a working line receiving end portion 25 and a protection line receiving end portion 29. The working line receiving end 25 includes the first and second wireless termination processing circuits 21 and 22, the RST multiplexing circuit 23, and the first and second MST.
It is composed of multiple circuits 24a and 24b.

The above-mentioned protection line receiving end 29 is composed of a radio termination processing circuit 26, a selection circuit 27, and first and second distribution circuits 28a and 28b, and an RS section and an MS.
A common protection line for the section is realized. Further, as will be described later, the wireless termination processing circuits 21, 22 and 26 have the same circuit configuration, but different circuit parts are used.

Next, the structure of each of the constituent blocks shown in FIG. 1 will be described in more detail. The RST termination circuit 11 includes an SPI circuit 111 and an RST termination unit 112, as shown in FIG. The SPI circuit 111 receives the STM-N signal 31 in the RS section from a multiplex transmission device (not shown). The RST terminator 112 terminates the RSOH of the SOH in the input signal, outputs an RST termination signal 33, and outputs an RST termination signal indicating that the signal is an RST termination circuit.
The T terminal circuit information (the first circuit information) 34 is output.

The MST termination circuits 12a and 12 shown in FIG.
b has the same circuit configuration, and has a circuit configuration as shown by 12 in FIG. As shown in the drawing, the MST termination circuit 12 includes an SPI circuit 121, an RST termination unit 122,
An ST terminal 123 is provided. SPI circuit 1
21 is the STM of the MS section from the multiplex transmission device (not shown)
The -N signal 32 is input.

The RST terminating unit 122 determines the SOH in the input signal.
Is terminated. Also, the MST termination unit 1
Reference numeral 23 terminates the MSOH constituting the SOH in the input signal. Therefore, RSOH and M
The MST termination signal 35 in which the SOH is terminated is output, and the MST signal indicating that the SOH is the MST termination circuit.
Termination circuit information 36 is output.

The first to third wireless multiplex processing circuits 13, 14 and 18 shown in FIG. 1 have the same circuit configuration, respectively.
The circuit configuration is shown at 60. As shown in FIG. 4, the wireless multiplexing processing circuit 60 includes an MSP unit 131, an SA circuit 132, an MST multiplexing unit 133, a function selecting unit 134, and an R.
The ST multiplexer 135 and the SPI circuit 136 are included.

The MSP section 131 receives an input signal 61 (in the case of the wireless multiplex processing circuit 13 of FIG. 1, the output signal 33 of the RST termination circuit 11; in the case of the wireless multiplex processing circuit 14, the output signal 35 of the MST termination circuit 12a; In the case of the processing circuit 18, the output signal 38) and the input signal 62 of the transmission switching circuit 16
(In the case of the wireless multiplex processing circuit 14 of FIG. 1, the output signal 35 'of the MST termination circuit 12b) is input and the redundant system switching of the MS section having the redundant configuration is performed. The SA circuit 132 performs transfer to the synchronous network clock signal and AU-3 / 4 pointer processing. The MST multiplexing unit 133 performs multiplexing processing of the MSOH for the wireless section.

The function selecting section 134 is the MST multiplexing section 133.
One of the input signal 61 and the signal that has undergone the series of processing in the MS section extracted from the above is selected based on the input termination circuit information 63 (34, 36, 39 in FIG. 1). That is, the function selection unit 134 selects the input signal 61 when the input termination circuit information 63 indicates the RST termination circuit information, and selects the output signal of the MST multiplexing unit 133 when the input termination circuit information 63 indicates the MST termination circuit information. select. Therefore, the function selecting unit 134 determines that the input termination circuit information 63 is RST.
When the termination circuit information is shown, the MSP unit 131, S
The circuit operations of the A circuit 132 and the MST multiplexing unit 133 are invalidated (masked).

The RST multiplexer 135 multiplexes the RSOH for the wireless section on the output signal of the function selector 134. The SPI circuit 136 outputs the output signal of the RST multiplexing unit 135 as the STM-N signal 54 for the radio section.

The radio termination processing circuits 21, 22 and 26 in the radio reception terminal station 20 of FIG. 1 have the same configuration, for example, as shown by 70 in FIG. As shown in FIG. 5, the wireless termination processing circuit 70 includes the SPI circuit 211, RS
The T terminal unit 212, the MST terminal unit 213, the first function selection unit 214, the synchronization changeover switch 215, the SA circuit 216, and the second function selection unit 217.

The SPI circuit 211 receives the wireless section signal 71 (STM-N signal 41, 42 or 43 in FIG. 1) as an input signal and inputs it to the RST termination section 212. The RST terminating unit 212 terminates RSOH which is a part of SOH of the input signal. The MST termination unit 213 terminates the MSOH of the input signal. Therefore, a signal obtained by terminating the entire SOH of the input wireless section signal 71 is extracted from the MST termination unit 213.

The function selecting section 214 outputs the signal terminating all of the SOH extracted from the MST terminating section 213 and the RST.
A signal obtained by terminating a part of the SOH extracted from the terminating unit 212 is received as an input signal, and the input multiplex circuit information 74 from outside (corresponding to 46, 49 or 51 in FIG. 1) is RS.
When the T termination multiplex system is shown, the RST termination unit 212
Of the MST termination multiplexing system is selected, the output signal of the MST termination unit 213 is selected.

The synchronous changeover switch 215 performs synchronous changeover on the basis of the signal selected by the function selecting section 214 and a synchronizing changeover signal 75 (corresponding to 54 or 55 in FIG. 1) inputted from the outside, and after the synchronous changeover. The signal is output to the SA circuit 216 and the function selection unit 217, respectively. The synchronous changeover switch 215 in the wireless termination processing circuit 26 of FIG. 1 is set so as to output the input signal through without switching.

The SA circuit 216 transfers the input signal to the synchronous network clock signal and performs AU-3 / 4 pointer processing. The function selection unit 217 receives the signal that has undergone the series of processes in the MS section extracted from the SA circuit 216 and a part of the SOH of the input wireless section signal 71 extracted from the synchronization changeover switch 215 (that is, RSOH). Input one of the signals that terminated the
4 (corresponding to 46, 49 or 51 in FIG. 1).

That is, when the input multiplex circuit information 74 indicates the RST multiplex circuit information, the function selecting section 217:
The output signal of the synchronization changeover switch 215 is selected, and when the MST multiplex circuit information is indicated, the output signal of the SA circuit 216 is selected. Therefore, when the input multiplex circuit information 74 indicates the RST multiplex circuit information, the function selection unit 217 invalidates (masks) the circuit operation of the MST termination unit 213 and the SA circuit 216.

The signal selected by the function selecting section 225 is the signal 72 subjected to the wireless termination processing (the signal 44, 47 or 52 in FIG. 1) and the same signal 73 subjected to the wireless termination processing (the signal 47 in FIG. 1). It is output as'). Also,
When the wireless termination processing circuit 70 is used in the protection line as in the circuit 26 of FIG. 1, a part of the signal supplied from the function selection unit 214 to the synchronization changeover switch 215 is branched and synchronized to the outside. Switching signal 76 (corresponding to 53 in FIG. 1)
Is output as

The RST multiplex circuit 23 in the wireless receiving terminal station 20 of FIG. 1 is constructed as shown in FIG. 6, for example. As shown in FIG. 6, the RST multiplex circuit 23 includes a system changeover switch 231, an RST multiplex unit 232, and an SPI circuit 233. The signals 44 and 56 terminated from the working line side and the protection line side, respectively, are transmitted to the system changeover switch 231. And one of them is selected by system switching control.

The RST multiplexer 232 multiplexes RSOH with respect to the output signal of the system changeover switch 231, and the STM-N signal in the RS section thus obtained is converted into S signal.
The signal 45 is output via the PI circuit 233. Further, the RST multiplex circuit 23 is configured to output RST multiplex circuit information 46 indicating that it is an RST multiplex circuit.

Furthermore, the MST multiplexing circuits 24a and 2 of FIG.
4b has the same configuration, for example, as shown at 24 in FIG. As shown in FIG.
Is a system changeover switch 241, an MST multiplexing unit 24
2. The RST multiplexer 243 and the SPI circuit 244. The signals 47 (47 ') and 57 (57') terminated from the working line side and the protection line side, respectively, are input to the system changeover switch 241. Select one by system switching control.

The MST multiplexing section 242 subjects the output signal of the system changeover switch 241 to MSOH multiplexing processing and outputs it to the RST multiplexing section 243. The RST multiplexer 243 multiplexes RSOH on the signal after MSOH multiplexing. The SPI circuit 244 outputs the output signal of the RST multiplexer 243 as the STM-N signal 48 (48 ') in the MS section. Further, the MST multiplexing circuit 24 is configured to output MST multiplexing circuit information 49 indicating that it is an MST multiplexing circuit to the outside.

Returning to FIG. 1 again, the wireless transmission terminal station 10 has a mixture of lines in the RS section and the MS section.
RST termination circuit 11 for the STM-N signal 31 in the section
Input the signal 33 obtained by RST termination to the wireless multiplex processing circuit 13 and the transmission switching circuit 16 together with the RST termination circuit information 34.

On the other hand, S in the MS section having a redundant configuration
For the TM-N signals 32 and 32 ', the wireless terminal station 1
0 is S by the MST termination circuits 12a and 12b, respectively.
All of the OH is terminated, the obtained signals 35 and 35 'are input to the wireless multiplex processing circuit 14 and the MSP unit 17, and the MST termination circuit information 36 is input to the wireless multiplex processing circuit 14 and the transmission switching circuit 16, respectively. .

The radio multiplex processing circuits 13 and 14 each have the circuit configuration shown in FIG.
Is the RST termination circuit information 34 from the RST termination circuit 11.
Based on (63 in FIG. 4), the function selection unit 134 selects the input signal 33 (61 in FIG. 4) and inputs it to the RST multiplexer 135 as it is. As a result, from the wireless multiplex processing circuit 13, as in the relay device shown in FIG.
The STM-N signal 41 (FIG. 4) multiplexed by the T-terminal multiplexing method.
64) is taken out.

When the RST termination multiplex system is supported, the B system input of the wireless multiplex processing circuit 13 (input signal 6 in FIG.
Although 2) has no input, the alarm is suppressed by the RST termination circuit information 34 (63 in FIG. 4).

On the other hand, the radio multiplex processing circuit 14 uses the MS
The MST termination circuit information 36 (6 in FIG. 4) extracted from the T termination circuits 12a and 12b and wired or ORed.
Based on 3), the function selecting unit 134 causes the MST multiplexing unit 133 to
Select the output signal of As a result, as in the standard multiplexer shown in FIG. 8, the wireless multiplexing processing circuit 14 switches the redundant system, transfers to the synchronous network clock signal, and AU-3.
A STM-N signal multiplexed by the MST termination multiplexing method by performing RSOH multiplexing processing for a wireless section on a signal that has undergone a series of processing in the MS section such as / 4 pointer processing and MSOH multiplexing processing for a wireless section. 42 (6 in FIG. 4)
4) is taken out.

On the other hand, the MSP unit 1 in the protection line sending end unit 19
7 receives the output signals 35 and 35 'of the MST termination circuit terminated by the MST termination multiplex system as input signals, performs redundant system switching, and terminates STM-N after switching selection.
The signal 37 is output. The transmission switching circuit 16 outputs the output STM-N signal 37 of the MSP section 17 and the RST termination circuit 11
The signal 33 and the RST termination circuit information 34 which are RST terminated by the MST termination circuit information 34 and the MST termination circuit information 36 which is extracted from the MST termination circuits 12a and 12b and wired or OR are received as input signals, and the working line is selected during the preliminary switching control. Then, the spare signal 38 and the spare information 39 are output.

The third radio multiplex processing circuit 18 receives the spare signal 38 and the spare information 39 as an input signal, and the spare line termination multiplexing system at the time of the spare switching control is spare information 39 (FIG. 4).
63), the preliminary signal 38 (6 in FIG. 4).
For 1), transfer to the synchronous network clock signal, AU
-3/4 pointer processing, wireless section MSOH multiple processing, a series of processing in the MS section, and then the RS for the wireless section
4 selects whether the OH multiplex processing or the direct radio section RSOH multiplex processing is performed on the spare signal 38 by the preliminary information 39, and after the wireless section RSOH multiplex processing is performed. Backup signal 43 to backup wireless line
Output as

Although the B system input (input signal 62 in FIG. 4) of the wireless multiplex processing circuit 18 is not input, the alarm is suppressed in advance because it is provided in the protection line sending end 19.

Next, the operation of the wireless receiving terminal station 20 will be described. The wireless termination processing circuit 21 in the wireless receiving terminal station 20 is
The radio signal 41 of the section is received, the function selection unit 214 of FIG. 5 selects the signal RST-terminated by the RST termination unit 212 based on the RST multiplexing circuit information 46 from the RST multiplexing circuit 23, and the synchronization changeover switch of FIG. Input to 215.

The synchronous changeover switch 215 performs synchronous changeover using the RST synchronous changeover signal 54 (75 in FIG. 5) from the protection line. In addition, R from the RST multiplexing circuit 23
Based on the ST multiplex circuit information 46, the function selection unit 21 of FIG.
7 is controlled so as to select the output signal of the synchronous changeover switch 215, the function selecting section 217 outputs the output signal of the synchronous changeover switch 215 to the STM-N signal 44 (in FIG. 72) is output.

The STM-N signal 44 and the spare signal 56 from the distribution circuit 28b are input to the RST multiplex circuit 23, and one signal is selected by the system changeover control by the system changeover switch 231 shown in FIG. The RST multiplexing unit 232 performs RSOH multiplexing processing on the selected signal, and the STM-N in the RS section is transmitted via the SPI circuit 233.
The signal 45 is output.

Further, the wireless termination processing circuit 22 in the wireless receiving terminal station 20 receives the wireless signal 42 in the MS section, and the wired or M-processed Ms from the MST multiplexing circuits 24a and 24b.
The function selection unit 21 of FIG.
4 selects the output signal of the MST termination unit 213, and the function selection unit 217 operates so as to select the output signal of the SA circuit 216.

As a result, the wireless termination processing circuit 22 receives the MS
Input the signal after the OH termination to the synchronization switch 215,
Here, synchronous switching is performed based on the MST synchronous switching signal 55 (75 in FIG. 5) from the protection line, and then the SA circuit 2
16 transfer to synchronous network clock signal and AU-3 /
The STM-N signals 47 and 47 '(72 and 7 in FIG. 5) which have been subjected to a series of MS section processing such as the pointer processing of FIG.
3) is output via the function selection unit 217.

The MST multiplexing circuits 24a and 24b are supplied with the above-mentioned signals 47 and 47 ', respectively, together with the spare signals 57 and 57' terminated by the spare line receiving end 29, and output one of these input signals. The system switching switch 241 shown in FIG. 7 selects the signal based on the system switching control, and the MST multiplexing unit 242 and the RST multiplexing unit 243 multiplex MSOH and RSOH to the signal after the selection, and the SPI circuit 244 is set. Through M
The STM-N signals 48 and 48 'in the S section are output, respectively.

On the other hand, the radio termination processing circuit 26 in the protection line receiving end 29 receives the radio signal 43 of the protection line and occupies the protection line during the protection switching control selected by the selection circuit 27. Circuit information 51 indicating (i.e., RST multiplex circuit information 46 or MST multiplex circuit information 4)
Based on 9), the function selection units 214 and 217 of FIG. 5 perform the selection operation.

In addition, the radio termination processing circuit 26 uses the output signal of the function selecting section 214 of FIG.
53) is supplied to the distribution circuit 28a in FIG. 1 while the switching operation is not performed when it is used in the protection line as described above, the synchronous changeover switch 215 shown in FIG. 5 is passed through, and the SA circuit 216 and the function selection are selected. Input to the section 217. One of these input signals is selected by the function selection section 217 based on the circuit information 51 and is supplied to the distribution circuit 28b as the spare signal 52 shown in FIG.

The distribution circuit 28a divides the above-mentioned signal 53 into two, and supplies the RST synchronization switching signal 54 and MS to the radio termination processing circuits 21 and 22 in the working line receiving end 25, respectively.
Is output as synchronizing switching signal 55 for T. Further, the distribution circuit 28b distributes the above-mentioned spare signal 52 to the RST multiplex circuit 23 as the first system switching signal 56, and the MS
The T multiplex circuits 24a and 24b each include a second system.
It outputs as the frame switching signals 57 and 57 '.

As described above, in this embodiment, each of the wireless multiplex processing circuits 13, 14 and 18 has the same structure,
Further, since the radio termination processing circuits 21, 22 and 26 have the same configuration, they are commonly used in the radio transmission terminal station 10 and the radio reception terminal station 20, and the RST termination multiplexing is performed by the termination circuit information or the multiplexing circuit information. It is configured to be compatible with both the system and the MST termination multiplex system.

Moreover, in this embodiment, the protection line sending end 19 is provided.
The radio multiplex processing circuit 18 in the inside and the radio termination processing circuit 26 in the protection line receiving end 29 are commonly used regardless of whether the termination multiplexing method of the protection line is the RST termination multiplexing method or the MST termination multiplexing method. You can Therefore, according to this embodiment, the working line of the RST termination multiplex system and the MS
It becomes easy to mix working lines of the T-termination multiplex system, and the change of the working line of one system to the working line of the other system is a common part between the working line and the protection line. , 14, 18 and wireless termination processing circuits 21, 22,
Since the change can be made by exchanging the circuit parts other than 26, the above change can be made much easier than in the conventional case.

The present invention is not limited to the above-mentioned embodiment. For example, in the above-mentioned embodiment, the working line of the RST termination multiplex system and the working line of the MST termination multiplex system are each one line. Of course, even when there are a plurality of working lines of the RST termination multiplex system and a plurality of working lines of the MST termination multiplexing system, the present invention can be applied.

[0076]

As described above, according to the present invention,
At the time of switching control, physical information of the terminal multiplexing method of the working line is given from the transmission switching circuit and the selecting circuit to the third wireless multiplexing processing circuit and the third wireless termination processing circuit of the protection line, respectively, and a required circuit section is provided. By choosing to use
The wireless multiplex processing circuit and the third wireless termination processing circuit can be commonly used in both cases of the first and second termination multiplex systems, so that each wireless in the working line transmission end is Combined with the common circuit configuration of the multiplex processing circuit and the common circuit configuration of each wireless termination processing circuit in the working line receiving end, the change from one of the working lines of the first and second termination multiplex systems to the other is possible. This can be greatly facilitated as compared with the related art, and therefore, even if the working lines of the first and second termination multiplex systems are mixed, the constraint condition on mounting can be eliminated.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a block diagram of an embodiment of an RST termination circuit of FIG. 1;

FIG. 3 is a block diagram of one embodiment of the MST termination circuit of FIG. 1;

FIG. 4 is a block diagram of one embodiment of the wireless multiplex processing circuit of FIG. 1;

FIG. 5 is a block diagram of one embodiment of the wireless termination processing circuit of FIG. 1;

FIG. 6 is a block diagram of one embodiment of the RST multiplexing circuit of FIG. 1;

FIG. 7 is a block diagram of one embodiment of the MST multiplexing circuit of FIG. 1;

FIG. 8 is a configuration diagram of a standard multiplexing device.

FIG. 9 is a configuration diagram of a standard relay device.

FIG. 10 is a configuration diagram of an example of a conventional wireless communication system.

[Explanation of symbols]

10 wireless transmission terminal station 11 RST termination circuit 12, 12a, 12b MST termination circuit 13, 14, 18, 60 wireless multiplexing processing circuit 15 working line transmission end portion 16 transmission switching circuit 17 MSP portion 19 standby line transmission end portion 20 wireless reception Terminal station 21, 22, 26, 70 Radio terminal processing circuit 23 RST multiplexing circuit 24, 24a, 24b MST multiplexing circuit 25 Working line receiving end 27 Selection circuit 28a, 28b Distribution circuit 29 Backup line receiving end 111, 121, 136 , 211, 233, 244 S
PI circuit 112, 122, 212 RST termination section 123, 213 MST termination section 131 MSP section 132, 216 SA circuit 133, 242 MST multiplexing section 134, 214, 217 Function selection section 135, 232, 243 RST multiplexing section 215 Synchronous changeover switch 231, 241 system changeover switch

Claims (3)

(57) [Claims] 1. A wireless transmission terminal comprising a working line transmission end connected to a plurality of working lines and a protection line transmission end, and a wireless transmission end station facing the working line transmission end and the protection line transmission end, respectively. A first terminal configured to include a wireless receiving end station including a working line receiving end and a protection line receiving end, and terminating and multiplexing only a part of maintenance management information in the wireless transmitting end station and the wireless receiving end station. The current line for transmitting the maintenance management information and data by the multiplex system, and the second termination multiplex system for terminating and multiplexing all of the maintenance management information and transferring to the synchronous network clock signal. In a wireless communication system in which working lines for transmitting information and data are mixed, the working line of the first termination multiplexing system and the working line of the second termination multiplexing system share a protection line at the time of line switching, The working line sending end is A first termination circuit that terminates the multiplexed signal in which the protection management information is multiplexed by the first termination multiplexing method and outputs first circuit information indicating that the termination signal is terminated by the first termination multiplexing method. A plurality of second termination circuits that terminate the multiplexed signal by the second termination multiplexing scheme and output second circuit information indicating that the multiplexed signal is terminated by the second termination multiplexing scheme; The output signal of the first termination circuit and the first circuit information are input, and the multiplex processing circuit section based on the first termination multiplex system is selected and used for multiplex processing based on the first circuit information. A first wireless multiplex processing circuit for transmitting, and the same circuit configuration as the first wireless multiplex processing circuit,
The output signals of the plurality of second termination circuits and the second circuit information are commonly input, and the multiplex processing circuit unit based on the second termination multiplex system is selected and used based on the second circuit information. A second wireless multiplex processing circuit for performing multiplex processing and transmitting, and the protection line transmission end section, and a switching selection section for switching and selecting each output signal of the plurality of second termination circuits. The output signal of the first terminating circuit, the first circuit information, the output signal of the switching selection unit, and the second circuit information are received as input signals, and the working line to be connected in parallel is selected by the preliminary switching control information. A transmission switching circuit that outputs a preliminary signal and preliminary information; and a circuit configuration that is the same as that of the first and second wireless multiplex processing circuits, and the first or second termination multiplex system is selected based on the preliminary information. A multi-processing circuit section based on A third wireless multiplexing processing circuit for processing and transmitting, wherein the working line receiving end receives the signal transmitted from the first wireless multiplexing processing circuit, and third circuit information from the outside. while terminating the received signal to select using the termination circuit section based on the first termination multiplexing method based on the
A first wireless termination processing circuit for synchronously switching to a first synchronization switching signal of a first termination multiplexing system; and a second wireless multiplexing circuit having the same circuit configuration as the first wireless termination processing circuit. The signal transmitted from the processing circuit is received, and the termination signal is terminated by selectively using the termination processing circuit unit based on the second termination multiplexing method based on the fourth circuit information from the outside, and the reception signal is terminated . 2nd termination multiplexing method
A second wireless termination processing circuit that performs synchronous switching to the second synchronization switching signal; an output signal of the first wireless termination processing circuit; and a first system.
Signal for switching the input signal, and switching the input signal, performing multiplexing processing by the first termination multiplexing method and outputting the same, and outputting information indicating that multiplexing is performed by the first termination multiplexing method. A first multiplexing circuit for outputting as information, an output signal of the second wireless termination processing circuit, and a second system
And a signal for indicating that the signal has been multiplexed by the second termination multiplexing method, and the input signal is switched, the input signal is switched and multiplexed by the second termination multiplexing method and output. A plurality of second multiplexing circuits for outputting as information, wherein the protection line receiving end receives the third and fourth circuit information and terminates the protection line at the time of line switching by the protection switching control information. A selection circuit for selecting a multiplexing method, and a circuit configuration that is the same as the first and second wireless termination processing circuits, receives a backup signal transmitted from the third wireless multiplexing processing circuit, and selects from the selection circuit. in the first or second termination multiplexing method based on the circuit information performs termination processing, and a third wireless termination circuit which outputs a synchronizing switch signal and the system switching signal to the working line, said first From the wireless termination processing circuit of 3 Wherein the synchronization switch signal to the first and second radio termination circuit the first and second
Of the first distribution circuit for distributing output as synchronizing switching signal, the third from the radio termination circuit the system switching signal the first and second to the first and second multiplexing circuits
And a second distribution circuit for distributing and outputting as a system switching signal . 2. The multiplexed signal is a synchronous transmission module signal having section overhead defined by a synchronous digital hierarchy as the maintenance management information, and the first wireless multiplex processing circuit converts the synchronous network clock signal to a synchronous network clock signal. The circuit section that performs the transfer is invalidated by the first circuit information, and the second wireless multiplexing processing circuit sets the circuit section that performs the transfer to the synchronous network clock signal valid by the second circuit information. The third wireless multiplex processing circuit selects the use of the circuit unit for transferring to the synchronous network clock signal based on the output preliminary information of the transmission switching circuit, and the first wireless termination processing circuit selects the synchronous network. The circuit unit that transfers to the clock signal is invalidated by the third circuit information, and the second wireless termination processing circuit transfers to the synchronous network clock signal. The circuit section that performs the above is validated by the fourth circuit information, and the third wireless termination processing circuit uses the circuit section that transfers to the synchronous network clock signal based on the circuit information from the selection circuit. The wireless communication system according to claim 1, wherein the wireless communication system is selected. 3. The first to third wireless termination processing circuits receive a physical interface circuit to which the multiplexed signal is input and an output signal of the physical interface circuit as an input signal, and receive the first signal. A first terminating unit that terminates only a part of the maintenance management information based on the termination multiplexing system, and an output signal of the first terminating unit as an input signal, and the remaining unterminated portion of the maintenance management information. A second terminating unit for terminating information to obtain a signal terminated based on the second terminating multiplex system, and the third or fourth of the output signals of the first and second terminating units. A first function selection unit that outputs one output signal selected based on circuit information to the outside, and an output signal of the first function selection unit is branched and input, and the synchronization switching is performed with respect to the input signal. Whether to switch for synchronization based on the signal The synchronous changeover switch for outputting in a loop, and the second signal for the output signal of the synchronous changeover switch.
Processing circuit for performing a series of processing in a multi-section section based on the terminal multiplexing method, and each output signal of the processing circuit and the synchronous changeover switch are input, and one signal is output based on the third or fourth circuit information. 3. The wireless communication system according to claim 1, further comprising a second function selection unit that selects and outputs.