JP2940251B2 - Call path switch switching 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 communication line switch switching system in a communication network for transmitting and receiving voice or data using a time-division multiplexed wire transmission line.

[0002]

2. Description of the Related Art Conventionally, a channel switching system for realizing a function of exchanging a plurality of time-division multiplexed wire transmission lines between accommodated time slots has been proposed for the purpose of ensuring reliability. A dual configuration is employed. By the way, with respect to this speech path switch switching system, there are cases where a standby speech path subsystem is replaced for the purpose of coping with periodic maintenance work and occurrence of a failure, and a case where a standby speech path subsystem is reset. The communication path switch switching information (hereinafter referred to as path setting information) in the corresponding standby communication 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, to achieve 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 adopted. . When the path setting information is not stored in the main control subsystem, a method of transferring all the path setting information of the active communication path subsystem to the standby communication path subsystem via, for example, the main control subsystem is known. 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 path setting request to the channel switching system is queued or abandoned, for example, in the main control subsystem.

[0005]

When the traffic density of a call is high, the transfer time of all the path setting information to the standby communication path subsystem according to the above-described method is determined by the time required for the path setting request to the communication path switch switching system. This is sufficiently long with respect to the occurrence interval, and as a result, there is a drawback that the call processing capability is temporarily greatly reduced, and the abandonment of the path setting frequently generates a signal for reporting a call processing abnormality.

[0006]

SUMMARY OF THE INVENTION A speech path switching system according to the present invention comprises a duplexed speech path subsystem for exchanging between time slots in a plurality of time-division multiplexed wired transmission paths, and the duplexed speech path subsystem. A main control subsystem bus-connected to the communication path subsystem and a control bus (SBUS) , and two independent sets of relay buses (RBS) for connecting the duplicated communication path subsystems. A communication unit configured to control the entire communication path subsystem; and a communication that is connected to the main processor unit via the relay bus and transmits and receives exchange data of time slots to and from the main control subsystem. Memory unit and before being connected to the main processor unit
Before being connected to the transit bus and the other channel subsystem
A bus switching unit for selecting one of the relay buses;
A speech path switch connected to the bus switching unit and a transfer bus (TBS) to store exchange data between time slots;
A memory section, a highway for exchanging time slots between the communication path switch / memory section and the plurality of wired transmission paths;
Switch part and Bei the bus <br/> scan connected channel switch control processor unit highway switch bus (HSB)
In addition, the main control subsystem is configured to transmit all path setting information.
When a transfer command is sent to the main processor of the active system
The main processor unit is the speech path switch memory unit
Reads path setting information from the relay bus of the operation system and standby
Via the bus switching unit and transfer bus of the
The standby channel switch memory unit (SMEM)
This is a configuration in which writing is performed.

[0007]

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.

[0009] The speech path switch switching system of the present invention comprises 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 subsystems (SPS) 10 and 11. and a speech path subsystem 10, 11 with bus <br/> scan connected main control subsystem (MCS) 20 in control bus (SBUS), together connecting the speech path subsystem 10, 11 which are duplexed Two independent sets of relay buses (RBS) 110 and 11
And 1. Call path subsystem (SPS) 1
0 is a main processor unit (CCP) 70 for controlling the entire communication path subsystem, and the main processor unit 70 and the RBS
Communication memory unit for transmitting and receiving switched data bus connected to the main control subsystem 20 and a time slot and (TMEM) 80 at 110, which is connected to the main processor section 70
A bus switching unit (BSW) 60 for selecting one of a relay bus (RBS) 110 and a relay bus (RBS) 111 connected to the other communication path subsystem; and a bus switching unit 60 and a transfer bus (TBS). ) A communication path switch memory unit (SMEM) 50 which is connected to a bus at 100 and stores exchange data between time slots;
Highway switch unit 30 performs the exchange of time slots between the memory unit 50 and a plurality of wired transmission paths and highways
A communication path switch control processor (SCP) 40 connected to the switch bus (HSB) 90 via a bus;
The communication path subsystem (SPS) 11 is also the SPS 10 described above.
Since the configuration is the same as described above, the description is omitted.

Under such a configuration, the main control subsystem 20 gives an operation command or a standby command to each of the communication path subsystems 10 and 11 so that the operation of the communication path subsystem (hereinafter referred to as operation communication When a control signal for transmitting all path setting information to the communication path subsystem in the standby state (hereinafter referred to as the standby communication path subsystem) is transmitted to the active 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 communication path subsystems (SPS) 10 and 11 via the system bus SBUS. Now, considering the case where the SPS 10 becomes the active system and the SPS 11 becomes the standby system, the highway switch unit (TSW) 30
The exchange between the time slots accommodated in HW0 to BHWn is executed, and output to the outgoing highways FHW0 to FHWn.

The setting of the time slot exchange data (hereinafter, referred to as path setting data) for the TSW 30 is performed by the speech path switch control processor (SCP) 40 via the highway switch bus (HBS) 90 and between the time slots. This is performed by reading out from the communication path switch memory unit (SMEM) 50 which 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
SW) 60 and a relay bus (RBS) 110,
Path setting data is sent from the main processor unit (CCP) 70.

The BSW 60 has RBS110 and RBS1.
11 is connected and the bus switching signal c0 output from the CCP 70 is valid.
Is connected only to the RBS 110. This CCP 70
The path setting information is received from the main control subsystem (MCS) 20 via the communication memory unit (TMEM) 80 including a dual port RAM and the SBUS.

When the MCS 20 sends an all-path setting transfer command to the CCP 70, the CCP 70
Reads the path setting information from 0, RBS110 and SPS
11 bus switching unit BSW61 and transfer bus TBS101
Standby communication path switch memory unit (SME)
M) Write to 51. This operation is a transfer between memories connected to the same bus. In the SPS 11, the bus switching signal c1 output from the main processor unit (CCP) 71 is invalid, and in the BSW 61, the relay bus (R
BS) 110 and the RBS 110 of (RBS) 111 is connected to the transfer bus (TBS) 101.

FIG. 2 is a diagram showing a memory map accessed by a microprocessor built in the CCP 70 and the CCP 71, which is visible from the CCP in the SPS .
This shows an address map. Each CCP is the other system path information
Information indicating that the OPI can be referred to, and an all-path setting request
When executing the process of, the CCP belonging to the active SPS is
Reads the contents of own path information SPI, and stores the information in another system.
By writing to the area of the path information OPI, the path
The fixed information is transferred. PMA is CCP70 and C
These are the program area and the work area of the CP 71. Pt and Pe are the start and end addresses of the PMA, and the own path information SPI is from the CCP 70 to the SMEM5.
St and Se are SPI areas that are referred to when accessing the SMEM 51 from the CCP 71.
Are the start address and the end address. The other-system path information OPI is an area referred to when the CCP 70 accesses the SMEM 51 and when the CCP 71 accesses the SMEM 50, and Ot and Oe are the start address and the last address of the SPI.

[0017]

As described above, according to the present invention, it is possible to reduce the transfer time of all the path setting information to the standby communication path subsystem, and as a result, it is possible to prevent a decrease in capability in call processing. In addition, since it is possible to minimize the occurrence of a call processing abnormality notification signal due to abandonment of the bus setting, there is an effect that the maintainability of the communication path switch switching system is improved.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing a memory map accessed by a microprocessor built in a main processor unit in FIG. 1;

[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 Communication path switch memory unit (SMEM) 60, 61 Bus switch 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 to BHWn Incoming highway c0, c1 Bus switching signal FHW0 to FHWn Outgoing highway OPI Other system path information Oi, Pt, St Start address Oe, Pe, Se Last address PMA Program area and work area SPI Own path information

Claims (1)

(57) [Claims] 1. A duplex communication path subsystem for exchanging between time slots in a plurality of time-division multiplexed wire transmission paths, and a bus comprising the duplex communication path subsystem and a control bus (SBUS). A connected main control subsystem, and two independent sets of relay buses (RBSs) for connecting the duplexed communication path subsystems, wherein the communication path subsystem is an entire communication path subsystem. a main processor unit for controlling the communication memory unit for transmitting and receiving switched data connected by a bus the main control subsystem unit and a time slot in the relay bus and main processor unit, coupled to said main processor unit wherein During ~
Wherein in connected to the relay bus and the other speech path subsystem
A bus switching unit for selecting one of the relay buses; a speech path switch / memory unit connected to the bus switching unit and a transfer bus (TBS) for storing exchange data between time slots; A memory section and a highway switch section for exchanging time slots between a plurality of wired transmission paths, and a communication path switch control processor section connected by a highway switch bus (HSB) ;
The master control subsystem issues a transfer instruction for all path setting information.
Command to the active main processor,
The processor section passes from the speech path switch / memory section
Reads setting information and talks on relay bus and standby
Via the bus switching unit and transfer bus of the
Write to the communication line switch memory section (SMEM)
Channel switch switching system and performs only.