JPH0936956A - Method for changing subscriber accommodation into exchange - Google Patents

Abstract

PROBLEM TO BE SOLVED: To distributedly accommodate subscribers in exchanges other than a specified exchange by switching and connecting the path of an accommodated subscriber to a free bus after releasing it on software when abandoning the specified exchange. SOLUTION: Before an exchange 81 is abandoned, inside a time division switch 11, the speech paths corresponding to respective subscribers 21 and 22 are respectively semifixedly set as a path 1 and a path 2 and accommodation positions are semifixedly accommodated in the exchange 81 as (a) and (b). The speech path corresponding to the subscriber 21 is set to a common path number '1' of time switches 61 and 62 and connected to the accommodation position (a) later. The speech path corresponding to the subscriber 22 is set to a common path number '2' of the respective time switches 61 and 62 and connected to the accommodation position (b) later. When distributedly changing the accommodation of the subscribers 21 and 22 to exchanges 82 and 83, on the time division switch 11, the paths 1 and 2 corresponding to the respective subscribers 21 and 22 are released on the software memory. Next, the free path is caught at the accommodation change destination.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention allows subscribers accommodated in each of one or more remote terminals to be accommodated in a time-division switch via a time-division highway corresponding to the remote terminal, and further to accommodate exchanges. Via time-sharing highways,
The present invention relates to a subscriber accommodation replacement method when it is semi-fixedly accommodated in any one of two or more exchanges, and, in particular, when a particular exchange of the exchanges is abolished, Each subscriber who had been accommodated until then can be simultaneously accommodated in another arbitrary exchange without encountering a path block, or when a specific exchange is replaced with a new exchange, it is accommodated in that specific exchange until then. Each of the existing subscribers was temporarily transferred to other exchanges at the same time without encountering a pass block, and after waiting for the completion of the exchange with the new exchange, the exchanges were temporarily transferred to that exchange. The present invention relates to a method of accommodating a subscriber in an exchange so that each subscriber is accommodated in a new exchange without encountering a path block.

[0002]

2. Description of the Related Art Up to now, when a large number of subscribers are semi-fixedly accommodated in any of two or more exchanges via a remote terminal and a time division switch, a specific exchange is abolished. When a new exchange is exchanged, each subscriber who has been accommodated in that particular exchange must be temporarily replaced by another arbitrary exchange. This is because each subscriber who has been accommodated in a specific exchange cannot enjoy various exchange services unless the exchange is exchanged in another arbitrary exchange.

By the way, as a conventional technique relating to the replacement of subscribers in a time division exchange, for example, Japanese Patent Laid-Open No. 6-464 is known.
Publication No. 70 is cited. As shown in FIG. 1 of the publication, the subscriber 61 is a remote terminal 51,
The exchange 6 is semi-fixedly housed in the exchange 11 via the time division switch 31. However, if the exchange 11 falls into a system-down state due to some reason, the subscriber 6
1 is accommodated in the spare exchange 10 via the remote terminal 51 and the time divisional switch 31. Under such circumstances, the subscriber 62 who is semi-fixedly accommodated in the exchange 12 through the remote terminal 52 and the time division switch 31.
In the case where the exchange 12 falls into the system down state, the subscriber 62 is accommodated in the spare exchange 10 via the remote terminal 52 and the time division switch 31.

As described above, when an exchange falls into a system-down state, a large number of subscribers accommodated in the exchange until then need to be replaced in the spare exchange. , It is necessary to switch the path for each of the subscribers inside the time division switch. Each subscriber is first transferred to the spare exchange as the transfer destination by capturing an empty path to the transfer destination of that path.

[0005]

By the way, the accommodation replacement of the subscriber in the exchange is also performed when the exchange itself is abolished or replaced with a new exchange. At that time, each of the subscribers that had been accommodated in the exchange to be abolished or to be exchanged until now is considered to be in a state in which the load is appropriately distributed to each of the exchanges (excluding the spare exchange) provided in the vicinity. Although the accommodations are replaced, until now, the situation is that no consideration has been given to quickly replacing a large number of subscribers while avoiding a pass block. Even after the exchange with the new exchange is completed, each subscriber who has been decentralized and accommodated in each exchange must be promptly reconstituted in the new exchange. It has not been done.

It is a first object of the present invention that, when an exchange is abolished, the subscribers who have been accommodated in the exchange are all distributed to all the other exchanges while avoiding the path block as much as possible. There is a method of replacing a subscriber in a possible exchange. A second object of the present invention is, when an exchange is exchanged with a new exchange, the subscribers accommodated in the exchange are all distributed to all the exchanges while avoiding the path block as much as possible. In addition,
After the completion of the exchange with the new exchange, there is provided a method for accommodating the subscribers in the exchange capable of simultaneously accommodating the subscribers in the new exchange.

[0007]

SUMMARY OF THE INVENTION The first object is to provide a time-division switch with a
After the path for each subscriber that has been accommodated in the specific exchange until then is released in the software memory, and after obtaining the path connection information after the accommodation change by capturing an empty path to the accommodation change destination of the path. By performing path switching at the same time using the path connection information as path switching control information, the subscribers that were previously accommodated in a specific exchange are distributed and replaced by the exchanges other than the specific exchange. It is achieved by

The second purpose is that, when a specific exchange is replaced with a new exchange, the path for each of the subscribers accommodated in the specific exchange until then is stored in the software memory on the time division switch. After being released, the path connection information after the accommodation change is obtained by capturing an empty path to the accommodation change destination of the path, and then the path connection information is used as the path switching control information to perform the path switching at the same time. Each subscriber who has been accommodated in a specific exchange until then is temporarily decentralized and exchanged in each exchange other than the specific exchange, and after waiting for the completion of the exchange of the specific exchange with the new exchange, the software memory is stored. The path connection information before the accommodation change stored in the above is used as the path switching control information, and the paths are switched all at once. Subscribers each, which has been is achieved by being accommodated sort all at once to the new exchange.

[0009]

When the specific exchange is abolished, if the path for each subscriber accommodated in the specific exchange until then is released in the software memory on the time division switch, the accommodation replacement destination That is, a large number of trappable paths can be secured. Therefore, the path for each of the subscribers is released on the software memory, and the path connection information after the accommodation relocation can be easily obtained by capturing an empty path to the accommodation relocation destination of these paths,
By using this as path switching control information, path switching is performed all at once, so that each of the subscribers can be distributed and replaced by each exchange other than the specific exchange while avoiding the path block as much as possible. Even when a specific exchange is replaced with a new exchange, as in the case of abolition,
Each subscriber who has been accommodated in a specific exchange is temporarily distributed and exchanged in each exchange other than the specific exchange, but the path connection information before the exchange is stored in advance in the software memory. In this case, the subscribers can be simultaneously accommodated in the new exchange by waiting for the completion of the exchange with the new exchange and using the information as the path switching control information to simultaneously perform the path switching.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS.
First, a relay system between subscribers and exchanges including a time division switch according to the present invention will be described. FIG. 1 shows a relay system as an example. As shown in the figure, in this example, the subscribers (SUB1, SUB) scattered at remote locations are
2) 21 and 22 are once remote terminals (RT) 31
After being accommodated in the optical subscriber line remote multiplex transmission equipment as
The time-division highway 5 is accommodated in the digital subscriber system (LXM) as the time-division switch 11 via the optical fiber transmission line as the time-division highway 41, and further, the time-division highway 5
It is assumed that the switch 81 is semi-fixedly housed in the exchange 81. Incidentally, in this example, for simplification of description, the subscribers 21 and 22 are connected to the remote terminal 31.
Only the subscribers 21, 2 are actually accommodated
Many subscribers other than the two are accommodated, and these subscribers are semi-fixedly dispersedly accommodated in the exchanges 81 to 83 via the same route. Further, for simplification of description, only one remote terminal is shown, but in general, one or more remote terminals are provided, and the subscribers accommodated in each of these remote terminals are the same. It is semi-fixedly distributed and accommodated in the exchanges 81 to 83 via different routes.

The outline of the present invention will be described with reference to FIG. 1. For example, when the exchange 81 is to be abolished or replaced, and the exchange 81 is actually abolished or replaced with a new exchange, The large number of subscribers (including the subscribers 21 and 22) that have been semi-fixedly accommodated in the exchange 81 have already been semi-fixed by the simultaneous path switching inside the time division switch 11. It is intended that the exchanges 82 and 83 that are accommodated in the respective units are collectively dispersed and replaced. In the case of distributed accommodation replacement, it is possible to equalize the load processing of each of the exchanges 82 and 83.

As can be seen from the above description, the time divisional switch 11 is directly related to the present invention, but the following is a brief supplementary explanation thereof. That is, the time-division switch 11 generally has a configuration of TST (T:
Time switch, S: space switch) configuration. As shown in the figure, the time divisional switch 11 in this example has the time switches (TSW) 61 to 61 on both sides of the space switch (HSW) 71.
Each of the subscribers housed in the remote terminal 31 is configured with a time switch 6
1 through the space switch 71 and then the time switch 6
2 to 64, respectively, and are distributed and accommodated in each of the exchanges 81 to 83.

The operation in the case where the exchange 81 accommodating each of the subscribers 21 and 22 is to be abolished and the exchange 81 is actually abolished will be described in detail below. . That is, in the inside of the time division switch 11 before the exchange 81 is abolished (before the path switching), the call paths for the subscribers 21 and 22 are semi-fixedly set as the path 1 and the path 2, respectively. The storage positions are semi-fixedly stored as a and b, respectively. The call path to the subscriber 21 is set to the common path number 1 of each of the time switches 61 and 62, and is connected to the accommodation position a, while the call path to the subscriber 22 is the common path of each of the time switches 61 and 62. In addition to being set to the number 2, it is connected to the accommodation position b.

When the subscribers 21 and 22 are distributed and accommodated in the exchanges 82 and 83 due to the abolition of the exchange 81 itself, first, on the time division switch 11, the subscribers 21 that have been accommodated in the exchange 81 until then. , 22 are released on the software memory, and empty paths are captured to the accommodation replacement destination of these paths 1 and 2. As shown in the figure, the path 2 between the space switch 71 and the time switch 63 is
Since the path 1 is empty between the space switch 71 and the time switch 64, these path 2 and path 1 are captured as empty paths to the accommodation relocation destination, so that the path connection information after the accommodation relocation is performed in advance. Is what you get.
By using this path connection information as path switching control information, path switching is performed all at once, and the space switch 7
1, the subscribers 21 and 22 are on the path 2 between the time switches 63.
Of the space switch 71 and the time switch 64 can be set to the call path for the other. In this example, as shown in the figure, between the time switch 61 and the space switch 71 after path switching, the call path for each of the subscribers 21 and 22 is changed from path 1, path 2 to path 2, path 1. Therefore, the call path to the subscriber 21 is set as the path 2 between the space switch 71 and the time switch 63, and the exchange 8 is set as the accommodation position a ′.
2, the call path for the subscriber 22 is set as the path 1 between the space switch 71 and the time switch 64, and it is semi-fixedly replaced by the exchange 83 as the containing position b '. It is supposed to be done.
However, if the call path for each of the subscribers 21 and 22 between the time switch 61 and the space switch 71 after the path switching is the same as that before the path switching, the subscriber 21 enters the exchange 83 and the subscriber 21. 22 may be exchanged and replaced in the exchange 82. Subscribers other than the subscribers 21 and 22 housed in the exchange 81 are also distributed and replaced in the exchanges 82 and 83 in the same manner.

The operation in the case where the exchange 81 is abolished has been described above in detail. However, even when the exchange is replaced with a new exchange, the subscriber accommodated in the exchange 81 is joined in exactly the same manner as above. The subscribers including the parties 21 and 22 may be temporarily dispersed and replaced by the exchanges 82 and 83. Eventually, when the exchange 81 is replaced with a new exchange, as a switchback process, the path connection information before the accommodation change stored in the software memory in advance is used as the path switching control information, and the paths are switched all at once. As a result, the subscribers who have been temporarily distributed and replaced in the exchanges 82 and 83 can be collectively replaced in the new exchanges. It should be noted that, although it is rare, when a subscriber housed in an exchange that has fallen into a system down state has been replaced by a spare exchange and the exchange has subsequently fallen into a system down state, that exchange The present invention can be applied to the case of replacing the subscriber accommodated in (1) with the spare exchange.

Finally, the switching process and the switchback process on the software memory will be described. 2A and 2B are flow charts of switching processing on the software memory,
It shows an example of a switchback processing flow. First, regarding the switching process, this is when the exchange is abolished or when the exchange is replaced with a new exchange, each subscriber who was accommodated in that exchange is temporarily distributed to each other exchange. It is supposed to be done when the accommodation is changed.
For simplification of description, the subscribers SUB1 and SUB2 will be described. First, the subscribers SUB1 and SUB2 are set between the TSWs 61 and 62.
The call path to the subscriber SUB1 is released in the software memory, and the path connection information before the accommodation change (before the path switching) is stored in the software memory in order to prepare for the switchback processing described later. (Processing 101, 1
02). After that, the same processing is performed on the subscriber SUB2 (processing 103, 10).
4). By releasing the call path as described above, it becomes possible to capture an empty path to the accommodation replacement destination. When capturing an empty path, first, the common path 2 between the time switches TSW 61 and 63 is captured, and The time switch TSW is stored in the software memory as the path connection information after the accommodation change (after the path switching) for the subscriber SUB1.
The path 1 which is vacant in common between 61 and 64 is captured, and is stored in the software memory as the path connection information after the accommodation change (after the path switching) for the subscriber SUB2. (Processing 105 to 108). Therefore, switching requests are made to the time switch 61 and the space switch 71 so that the paths are switched all at once based on the path connection information before and after the accommodation change, so that the subscribers SUB1 and SUB2 are respectively switched. 8
2,83 can be accommodated.

When the exchange 81 is replaced with a new exchange, the subscribers stored in the exchange 81 until then are temporarily dispersed and replaced in the other exchanges 82 and 83 respectively. After the completion of the exchange with the new exchange, as a switchback process, each of these subscribers is relocated to the new exchange, but all of them are batched based on the already obtained path connection information before and after the relocation. By changing the path, the accommodation is changed (process 110).

[0018]

As described above, according to the first aspect of the present invention, when an exchange is abolished, each subscriber accommodated in the exchange is prevented from blocking a path block as much as possible, and another exchange is used. Each of the subscribers can be distributed and replaced at the same time, and in the case of claim 2, when the exchange is replaced with a new exchange, each subscriber who has been accommodated in that exchange while avoiding the path block as much as possible. In addition, the subscribers can be collectively accommodated in the other exchanges, and then the subscribers can be collectively accommodated in the new exchanges after the completion of the exchange with the new exchanges.

[Brief description of drawings]

FIG. 1 includes a time divisional switch according to the present invention,
A diagram showing a relay system between subscribers and exchanges in one example

FIGS. 2A and 2B are diagrams showing a switching process flow example and a switchback process flow example on a software memory, respectively.

[Explanation of symbols]

11 ... Time-division switch, 21, 22 ... Subscriber, 31 ... Remote terminal, 81-83 ... Exchange, 61-64 ... Time switch, 71 ... Space switch

Front page continued (72) Inventor Akira Yamaguchi 216 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa, Ltd. Information & Communication Division, Hitachi, Ltd. (72) Inventor Yoshio Sato 1-1-6 Uchisaiwai-cho, Chiyoda-ku, Tokyo Date Inside the Telegraph and Telephone Corporation (72) Inventor Akira Tokutake 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation

Claims (2)

[Claims] 1. A subscriber accommodated in each of one or more remote terminals is accommodated in a time division switch via a time division highway corresponding to the remote terminals, and further, via a time division highway corresponding to an exchange. If it is semi-fixedly housed in one of the two or more exchanges,
Among the above-mentioned exchanges, when a specific exchange is abolished, each subscriber who has been accommodated in the specific exchange until then is distributed to each of the exchanges other than the specific exchange to accommodate the subscribers in the exchange. As a replacement method, when a specific exchange is abolished, on the time division switch, the path for each subscriber accommodated in the specific exchange until then is released in software memory, and the path is also released. By obtaining the path connection information after the accommodation change by capturing an empty path to the accommodation change destination of, the path connection information is used as the path switching control information, and the paths are collectively switched,
Each subscriber previously accommodated in a particular exchange,
A method for accommodating a subscriber in an exchange, wherein the exchange is distributed and exchanged in each exchange other than the specific exchange. 2. A subscriber accommodated in each of one or more remote terminals is accommodated in a time division switch via a time division highway corresponding to the remote terminal, and further, via a time division highway corresponding to an exchange. If it is semi-fixedly housed in one of the two or more exchanges,
Among the above-mentioned exchanges, when a specific exchange is exchanged with a new exchange, the subscribers that have been accommodated in the specific exchange until then can be temporarily distributed and exchanged to the exchanges other than the specific exchange. In the method of accommodating a subscriber to a new exchange, when a specific exchange is replaced with a new exchange, on the time-division switch, the path for each subscriber accommodated in the specific exchange until then is software. After being released in the memory and obtaining the path connection information after the accommodation change by capturing an empty path to the accommodation change destination of the path, the path connection information is used as the path switching control information to perform the path switching at the same time. As a result, each subscriber who has been accommodated in a particular exchange until then is temporarily decentralized and exchanged in each exchange other than the particular exchange, and a new exchange of the particular exchange is created. After the completion of the exchange with the exchanges, the path connection information before the accommodation exchange stored in the software memory in advance is used as the path switching control information, and the paths are switched all at once, so that they are temporarily distributed to the exchanges. A method of accommodating subscribers to an exchange so that all the subscribers who have been accommodated are accommodated to a new exchange at the same time.