JPH0568293A - Channel switch changeover system - Google Patents

Abstract

PURPOSE:To prevent tentative reduction in call processing capability and frequent occurrence of a call processing fault notice signal in the case of transfer of all path setting information between channel systems of duplicate configuration. CONSTITUTION:Channel subsystems (SPS) 1-0,11 of duplicate configuration are interconnected by two independent relay buses (RBS) 110,111. Each of the subsystems 10,11 controls a bus changeover section (BSW) 60 or 61 to select either of its own system bus or other system bus with an operation/standby command of a main control subsystem (MCS) 20. The channel subsystem of the active system accesses both channelswitch memory sections (SEN) 50,51 of its own system and other system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication path switch switching system in a communication network for transmitting and receiving voice or data using a time-division multiplexed wire transmission path.

[0002]

2. Description of the Related Art Conventionally, in a speech path switch switching system for realizing a switching function between accommodated time slots for a plurality of time-division-multiplexed wired transmission paths, the purpose is to ensure reliability. A duplex configuration is adopted. By the way, for this call path switch system, there are cases where the standby call path subsystem is replaced or the stand-by call path subsystem is reset for the purpose of periodic maintenance work and troubleshooting. The call path switch switching information (hereinafter referred to as path setting information) in the corresponding standby call path subsystem is returned to the initial state. However, it is necessary to completely match the path setting information in the corresponding standby communication path subsystem with the path setting information of the active system actually used.

Conventionally, in order to realize this object, when path setting information is stored in the main control subsystem, a method of transferring the entire path setting information to the standby communication path subsystem is used. .. When the path setting information is not stored in the main control subsystem, for example, a method of transferring all the path setting information of the working channel subsystem to the standby channel subsystem via the main control subsystem is available. Has been taken.

In these methods, transfer of new path setting information to the active communication path subsystem is suspended until transfer of all path setting information to the standby communication path subsystem is completed. The generated request for path setting to the speech path switch system is queued or abandoned, for example, in the main control subsystem.

[0005]

By the way, when the traffic density of a call is high, the transfer time of all the path setting information to the standby communication path subsystem by the above-mentioned method depends on the path setting request to the communication path switch system. It has a drawback that it becomes sufficiently long with respect to the occurrence interval, and as a result, the call processing capacity is greatly reduced temporarily, and abandonment of path setting causes a large number of signals to report call processing abnormalities.

[0006]

SUMMARY OF THE INVENTION A speech path switch switching system according to the present invention is a duplexed speech path subsystem for exchanging between time slots in a plurality of time division multiplexed wired transmission paths. And a main control subsystem bus-connected to the call path subsystem, and two sets of independent bus lines that connect the duplicated call path subsystems to each other. Main processor unit for controlling the entire path subsystem, a memory unit for bus connection with the main processor unit for transmitting and receiving time slot exchange data to and from the main control subsystem unit, and a bus connected to the main processor unit. And a bus switching unit for selecting one of the bus connected to the other communication path subsystem, and a time connected to the bus switching unit for bus connection. Call path switch / memory unit that stores exchange data between lots, and call path switch control that is bus-connected to the call path switch / memory unit and a highway switch unit that exchanges time slots between a plurality of wired transmission paths It is composed of a processor unit.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

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

The speech path switch switching system according to the present invention includes duplexed speech path subsystems (SPS) 10 and 11 for exchanging between time slots in a plurality of time division multiplexed wire transmission paths, and the duplexed speech path subsystem. A main control subsystem (MCS) 20 bus-connected to the speech path subsystems 10 and 11, and two independent relay buses (RBS) 110 that connect the duplicated speech path subsystems 10 and 11 to each other. And 111. The speech path subsystem (SPS) 10 includes a main processor unit (CCP) 70 that controls the entire speech path subsystem.
A communication memory unit (TMEM) 80 which is bus-connected to the main processor unit 70 and transmits / receives time slot exchange data to / from the main control subsystem unit 20, a bus connected to the main processor unit 70, and the other communication path subsystem. Bus switching unit (BS that selects either one of the connected buses)
W) 60, a speech path switch / memory unit (SMEM) 50 that is connected to the bus switching unit 60 by bus and stores exchange data between time slots, and between the speech path switch / memory unit 50 and a plurality of wired transmission paths. It comprises a highway switch unit 30 for exchanging time slots, and a speech path switch control processor unit (SCP) 40 connected to a bus. The call path subsystem (SPS) 11 is also the above-mentioned SP
Since the configuration is the same as S10, the description is omitted.

Under such a configuration, the main control subsystem 20 gives an operation command or a standby command to the call path subsystems 10 and 11, respectively, and the call path subsystem is brought into an operating state (hereinafter, operation call Path subsystem), when a control signal is sent to transfer all path setting information to the call path subsystem in the standby state (hereinafter referred to as the standby call path subsystem), the operation system The transfer of the path setting information from the communication path subsystem to the standby communication path subsystem is realized by transferring data between memories via a set of bus lines.

The details of the operation will be described below. The main control subsystem (MCS) 20 sends an operation command or a standby command to the speech path subsystems (SPS) 10 and 11 via the system bus SBUS. Considering the case where the SPS 10 is now the active system and the SPS 11 is the standby system, the highway switch unit (TSW) 30 is the input highway B.
Exchange between the time slots accommodated in HW0 to BHWn is executed, and output to the output highway FHW0 to FHWn.

The time slot exchange data (hereinafter referred to as path setting data) for the TSW 30 is set by the communication path switch control processor (SCP) 40 between the time slots via the highway switch bus (HBS) 90. It is executed by reading from the communication path switch memory unit (SMEM) 50 that stores the exchange data of

The SMEM 50 is composed of a dual port RAM, and includes a transfer bus (TBS) 100 and a bus switching unit (B
Via SW) 60 and relay bus (RBS) 110,
Path setting data is sent from the main processor unit (CCP) 70.

The BSW 60 has RBS 110 and RBS 1
11 is connected and the bus switching signal c0 output from the CCP 70 is valid.
Is only connected to RBS 110. This CCP70
The path setting information is received from the main control subsystem (MCS) 20 via the communication memory unit (TMEM) 80 composed of the dual port RAM and the SBUS.

When the MCS 20 sends an all-path setting transfer command to the CCP 70, the CCP 70 sends the SMEM 5
The path setting information is read from 0 and the RBS 110 and SPS are read.
11 bus switching unit BSW61 and transfer bus TBS101
Standby system communication path switch / memory unit (SME
M) Write to 51. This operation is a transfer between memories connected to the same bus. The bus switching signal c1 output from the main processor unit (CCP) 71 is invalid in the SPS11, and the relay bus (R
Of the BS) 110 and the (RBS) 111, the RBS 111 is connected to the transfer bus (TBS) 101.

FIG. 2 is a diagram showing a memory map accessed by a microprocessor incorporated in the CCP 70 and CCP 71. PMA is CCP 70 and CCP 7.
1 is a program area and a work area. P
t and Pe are the start and end addresses of PMA,
The local path information SPI is an area referred to when the CCP 70 accesses the SMEM 50 and the CCP 71 accesses the SMEM 51, and St and Se are the start address and the end address of the SPI. Other system path information OPI
Access to SMEM51 from CCP70 and CCP
In the area referred to when the SMEM 50 is accessed from 71, Ot and Oe are the start address and end address of the SPI.

[0017]

As described above, according to the present invention, it is possible to shorten the transfer time of all path setting information to the standby communication path subsystem, and as a result, it is possible to prevent a decrease in call processing capability. In addition, it is possible to minimize the generation of a call processing abnormality notification signal due to abandonment of the bus setting, which has the effect of improving the maintainability of the speech path switch system.

[Brief description of drawings]

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

FIG. 2 is a diagram showing a memory map accessed by a microprocessor incorporated in a main processor unit in FIG.

[Explanation of symbols]

10, 11 Speech path subsystem (SPS) 20 Main control subsystem (MCS) 30, 31 Highway switch section (TSW) 40, 41 Speech path switch control processor section (SC)
P) 50,51 Call path switch memory unit (SMEM) 60,61 Bus switching unit (BSW) 70,71 Main processor unit (CCP) 80,81 Communication memory unit (TMEM) 90,91 Highway switch bus ( HSB) 100, 101 Transfer bus (TBS) 110, 111 Relay bus (RBS) BHW0-BHWn Input highway c0, c1 Bus switching signal FHW0-FHWn Output highway OPI Other system path information Oi, Pt, St Start address Oe, Pe, Se final address PMA program area and work area SPI own path information

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Claims (1)

[Claims] 1. A dual channel subsystem for exchanging between time slots in a plurality of time-division multiplexed wire transmission channels, and a main control subsystem bus-connected to the dual channel subsystem. And two sets of independent bus lines connecting the duplexed speech path subsystems, the speech path subsystem comprising:
A main processor unit that controls the entire communication path subsystem, a communication memory unit that is bus-connected to the main processor unit and that exchanges time slot exchange data with the main control subsystem unit, and that is connected to the main processor unit. Bus and a bus connected to the other communication path subsystem, a bus switching unit, and a communication path switch / memory unit that is connected to the bus switching unit and stores exchange data between time slots And a highway switch section for exchanging time slots between the speech path switch / memory section and a plurality of wired transmission paths, and a speech path switch control processor section connected to a bus. Switch change system.