JPH0884388A - Subscriber accommodation system - Google Patents

Abstract

PURPOSE: To suppress a rate of increase in number of transmission lines small by allowing a central management equipment to transit repetitively the inter-connection state between a subscriber access device and a service node according to a preset pattern as time elapses. CONSTITUTION: The system is provided with plural (m) subscriber access devices 51-5m accommodating subscriber terminals 81-8L, plural (n) service nodes 21-2n offering service to the subscriber terminals 81-8L, an n×m cross connect switch 8 interconnecting the subscriber access devices 51-5m and the service nodes 21-2n and a central management equipment 1 controlling the cross connect switch 8. The central management equipment 1 transits repetitively the interconnection state between the subscriber access devices 51-51m and the service nodes 21-2n according to a preset pattern as time elapses. In this case, all of the subscriber access devices 51-51m and all of the service nodes 21-2n are connected at once for one repetitive period.

Description

Detailed Description of the Invention

[0001]

This invention is used in public communication networks.
The present invention is used in a communication network configuration in which a plurality of subscribers share a service node. The present invention relates to a technique for reducing the number of transmission lines between nodes.

[0002]

2. Description of the Related Art It is desirable for a plurality of subscriber terminal devices to share a service node included in a communication network from the viewpoint of effective use of the service node. A conventional example for that purpose will be described with reference to FIG. FIG. 4 is a block diagram of a conventional device. The conventional device shown in FIG. 4 is disclosed in Japanese Patent Application Laid-Open No. 2-100948, "ISD".
N subscriber line multiplex system ", the service nodes 21 to 2n included in the communication network are connected to the subscriber access devices 51 to 51n.
A plurality of subscriber terminal devices 81 to 8L accommodated in 5 m
Is a configuration for sharing.

[0003]

In such a conventional device, the connection between the subscriber access devices 51 to 5m and the service nodes 21 to 2n is estimated in advance by the number of service nodes to which the subscriber access devices 51 to 5m belong. It is required that the subscriber access devices 51-5m and the service nodes 21-2n have capacity. If this number of belongings is large, the capacity will be extremely large. That is, if there is a possibility that all the subscriber access devices 51 to 5m and all the service nodes 21 to 2n are connected regardless of the connection frequency, the possible combinations are always connected. Required to be present.

The problem of the conventional example will be further described with reference to FIG. FIG. 5 is a subscriber access device 51 in the conventional example.
55 is a diagram showing a state in which the service nodes 21 to 25 are connected to each other. In this way, if each of the five subscriber access devices 51 to 55 and the service nodes 21 to 25 are connected, it is required to provide a total of 25 transmission lines. That is, in this case, the number of transmission lines increases in proportion to the square of the number of nodes, and for example, 100 transmissions are made between 10 subscriber access devices 51 to 510 and service nodes 21 to 210, respectively. It becomes necessary to provide a passage.

The present invention has been made against such a background, and while maintaining the connection relationship by an arbitrary combination, the rate of increase in the number of transmission lines connecting the nodes due to the increase in the number of nodes is kept low. It is an object of the present invention to provide a subscriber accommodating system that can handle such a situation.

[0006]

SUMMARY OF THE INVENTION The present invention is a subscriber accommodation system, which is characterized in that a plurality of m subscriber access devices respectively accommodating subscriber terminals and a service for each subscriber terminal are provided. A plurality of n service nodes to be provided, and an n × m cross-connect switch for mutually connecting the subscriber access device and the service node,
A central control device for controlling the cross-connect switch and a communication means for notifying the control status of the central control device to each subscriber access device and each service node are provided. There is provided control means for repeatedly transiting the interconnection state with the service node according to a preset pattern.

The control means, during one repetition period,
It is preferable that all of the plurality of m subscriber access devices and all of the plurality of n service nodes are connected at least once.

In the control means, one subscriber access device is preferably connected to all service nodes at the same time.

Thus, if a plurality of m subscriber access devices and a plurality of n service nodes are connected by m + n communication lines via the cross-connect switch,
It is possible to provide the subscriber terminal with the same service as when it is connected by m × n communication lines.

It is preferable that at least a part of the subscriber access device is provided with a concentrator switch for connecting a part of the plurality of L subscribers to the cross-connect switch.

The subscriber access device is provided with a message communication unit, which is connected to the communication means, and the message communication unit determines the connection state of the cross-connect switch at that time via the concentrator switch. It is desirable to include means for communicating to the subscriber terminal.

The centralized management device includes means for collecting the connection state of the concentrator switches of each subscriber access device via the communication means, and each of the service nodes has a processor, and the processor is connected to the communication means. It is desirable that the connection information of the concentrator switch be transmitted from the centralized management device to the processor to the communication means.

Each of the service nodes preferably includes a processor, and the processor is preferably connected to the communication means.

It is desirable that the communication means for connecting the processor of the service node and the central control unit be fixedly connected regardless of the connection of the cross-connect switch.

It is desirable that the subscriber terminal and the service node are provided with a buffer for temporarily storing information in order to transmit continuous information in a time division manner.

As a result, the subscriber terminal accommodated in each subscriber access device can grasp the timing at which a desired communication path is connected in advance and prepare for transmission / reception, so that smooth communication can be performed. Further, by providing a buffer, continuous information can be handled.

[0017]

A plurality of m subscriber access devices each accommodate a subscriber terminal and are provided with a plurality n of service nodes that provide services to the subscriber terminals. The cross-connect switch interconnects the subscriber access device and the service node. The centralized management device controls this cross-connect switch. The control state of the centralized management device is notified to each subscriber access device and each service node by the communication means.

In the present invention, the centralized management device is characterized in that the interconnection state between the subscriber access device and the service node is repeatedly changed over time according to a preset pattern.

At this time, a plurality of m
It is preferable that all of the subscriber access devices and all of the plurality of n service nodes are connected at least once.

Also, it is preferable that one subscriber access device is simultaneously connected to all service nodes at one time.

As a result, it is possible to provide the subscriber with the same service as when m × n communication lines are used by using m + n communication lines.

At least a part of the subscriber access device may be provided with a concentrator switch for connecting a part of the plurality of L subscribers to the cross-connect switch.

The subscriber access device is provided with a message communication unit, which is connected to the communication means, and the message communication unit indicates the connection state of the cross-connect switch at that time through the concentrator switch to the subscriber terminal. Good to tell.

The centralized management device collects the connection state of the concentrator switch of each subscriber access device via the communication means, each service node is provided with a processor, and this processor is connected to the communication means, and this communication means is connected to the communication means. It is preferable that the centralized management device transmits the connection information of the concentrator switch to the processor.

Each service node comprises a processor, which is preferably connected to the communication means.

It is preferable that the communication means for connecting the processor of the service node and the central control unit be fixedly connected regardless of the connection of the cross-connect switch.

The subscriber terminal and the service node may be provided with a buffer for temporarily storing information in order to transmit continuous information in a time division manner. Thereby, continuous information can be transmitted and received smoothly.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram of an apparatus according to the present invention.

The present invention is a subscriber accommodation system, which is characterized by a plurality of m subscriber access devices 51 to 5 m accommodating subscriber terminal devices 81 to 8 L, respectively.
A plurality of n service nodes 21 to 2n that provide services to the subscriber terminal devices 81 to 8L, and n × m cross-connect switches 8 that mutually connect the subscriber access devices 51 to 5m and the service nodes 21 to 2n. And a centralized management device 1 for controlling the cross-connect switch 8
And a communication means for notifying the subscriber access devices 51 to 5m and the service nodes 21 to 2n of the control state of the centralized management device 1 inside the centralized management device 1. It is provided with a control means for repeatedly transiting an interconnection state between the person access devices 51-5m and the service nodes 21-2n with a lapse of time according to a preset pattern.

This control means, during one repetition period,
All of a plurality of m subscriber access devices 51 to 5 m and a plurality of n
The control is performed so that all the service nodes 21 to 2n are connected at least once.

Further, the control means performs control such that one subscriber access device 51-5m is simultaneously connected to all service nodes 21-2n at one time point.

At least some of the subscriber access devices 51 to 5m are provided with line concentrator switches 61 to 6m for connecting some of a plurality of L subscribers to the cross-connect switch 8.

The subscriber access devices 51 to 5m are provided with message communication units 71 to 7m. The message communication units 71 to 7m are connected to the communication means inside the centralized management device 1. The message communication units 71 to 7m are The connection state of the cross-connect switch 8 at that time is determined by the concentration switches 61 to 61.
It includes means for transmitting to the subscriber terminal devices 81 to 8L via 6m.

The centralized management device 1 has a line concentrator switch 6 of each of the subscriber access devices 51 to 5m via its internal communication means.
The service nodes 21 to 2n are provided with processors 41 to 4n, respectively, and the processors 41 to 4n are connected to communication means.
The communication means includes the central control unit 1 to the processors 41 to 41.
The connection information of the concentration switches 61 to 6m is transmitted to 4n.

The service nodes 21 to 2n are provided with processors 41 to 4n, respectively.
Is connected to the communication means of the centralized management device 1.

Processors 4 of service nodes 21-2n
Communication means for connecting 1 to 4n and the centralized management device 1 are fixedly connected regardless of the connection of the cross-connect switch 8.

Each of the subscriber terminal devices 81 to 8L and the service nodes 21 to 2n is provided with a buffer for temporarily storing information in order to transmit continuous information in a time division manner.

The service nodes 21 to 2n are provided with networks 31 to 3n, and subscriber terminal devices 81 to 8n.
Devices that provide various services to the are included in the network 31. The processors 41 to 4n individually control the service nodes 21 to 2n while transmitting and receiving control information between the service nodes 21 to 2n and the centralized management device 1.

Next, the operation of the embodiment of the present invention will be described with reference to FIGS. FIG. 2 is a diagram showing link mapping. FIG. 3 is a diagram for explaining the operation of the embodiment of the present invention. The central management device 1 includes subscriber groups and service nodes 21 in the subscriber access devices 51 to 5m.
Data on the traffic conditions of the belonging subscribers and the traffic conditions of ~ 2n are held. The centralized management device 1 belongs to each of the subscribers based on the correspondence information between the subscriber groups accommodated in the subscriber access devices 51 to 5m and the service nodes 21 to 2n and the traffic conditions of the accommodated subscribers. For the link capacity (number of time slots) and the mapping on that link.

The centralized management device 1 notifies each of the subscriber access devices 51 to 5m of the capacity of the links between the cross-connect switches 8 and the mapping (classified by each of the service nodes 21 to 2n), and informs each of the service nodes 21 to 2n. The link capacity between the cross-connect switches 8 and the mapping (divided according to the subscriber access devices 51 to 5m) are notified, and the cross-connect switches 8 are controlled so that the respective belongings are connected.

Based on the information from the centralized management device 1, each of the service nodes 21 to 2n performs line-concentration control of the corresponding subscriber group within the assigned time slot so as to connect to the assigned time slot, and the information is collected. That is, which subscriber terminal device 81 to 8L is connected to the service node 21 to
Information about which time slot in the area allocated to each 2n is connected to each subscriber access device 51-5m through the centralized management device 1.

Each of the subscriber access devices 51 to 5m follows the instruction from each service node and follows the service node 21.
Each of the concentrator switches 61 to 6m is controlled so that the subscriber's signal can be connected to a designated time slot in another area of .about.2n. When it is desired to change the membership relationship between the subscriber terminal devices 81 to 8L in the subscriber access devices 51 to 5m and the service nodes 21 to 2n, this can be realized by the procedure described above.

FIG. 2 shows link mapping. That is, it shows a line-concentration control image of the subscriber access devices 51 to 5m and the service nodes 21 to 2n. In the example shown in FIG. 2, all the subscriber access devices 51 to
5m and all the service nodes 21 to 2n have a membership relationship. If the subscriber access device 51 has no attribution
If ~ 5m and service nodes 21 to 2n are present, by configuring a time slot so as not to include links therein, it is possible to shorten the cycle in which the connection pattern makes a transition and completes one cycle.

The concentrator switches 61 to 6m in the subscriber access devices 51 to 5m belong to the service nodes 21 to 2 to which they belong.
Regardless of the number of n, it is sufficient that there are n switch capacities for accommodating the self-accepting subscriber terminal devices 81 to 8L in one service node 21 to 2n. Further, the subscriber access devices 51 to 5m that accommodate the networks 31 to 3n in each of the service nodes 21 to 2n at the same time are not the capacity of the subscriber access devices 51 to 5m that may accommodate the networks.
It suffices to have a switch capacity of m minutes.

The operation of the embodiment of the present invention will be further described with reference to FIG. In the link mapping shown in FIG.
The first time slot is TS1 and the next time slot is TS2. Further, although not shown, in the next time slot TS3, all the subscriber access devices 51 to 5m are connected to the service node 23 in the mapping between the subscriber access devices 51 to 5m and the cross-connect switch 8. Service nodes 21 to 2n
All the service nodes 21 to 2n are connected to the subscriber access device 53 in the mapping between the cross connect switch 8 and the cross connect switch 8. Further, in order to make the explanation easy to understand, the cross-connect switch 8 is not shown in FIG. 3, and the operations of the three subscriber access devices 51 to 53 and the service nodes 51 to 53 are shown.

When viewed from the side of the subscriber access devices 51 to 53 at the timing of FIG. 3 (TS1), all transmission lines are connected to the service node 21. Further, when viewed from the service nodes 21 to 23 side, all the transmission lines are connected to the subscriber access device 51. Figure 3 (TS2)
When viewed from the side of the subscriber access devices 51 to 53 at this timing, all the transmission lines are connected to the service node 22. Further, when viewed from the service nodes 21 to 23 side, all the transmission lines are connected to the subscriber access device 52. When viewed from the side of the subscriber access devices 51 to 53 at the timing of FIG. 3 (TS3), all the transmission lines are connected to the service node 23. Further, when viewed from the service nodes 21 to 23 side, all the transmission lines are connected to the subscriber access device 53.

As described above, an arbitrary connection can be realized by periodically changing the connection pattern according to the passage of time. However, the number of transmission lines connected at the same timing can be reduced as compared with the case where transmission lines for all possible combinations are provided in advance, as shown in the conventional example.

[0048]

As described above, according to the present invention,
It is possible to realize a subscriber accommodating method capable of suppressing the increase rate of the number of transmission lines connecting the nodes due to the increase in the number of nodes while maintaining the connection relationship by an arbitrary combination.

As a result, for example, when a service node is out of order, a decentralized accommodating system having a working spare node for promptly switching and connecting a subscriber terminal device to another service node can be realized. Since the number of transmission lines existing at the same timing only needs to be connected to the active node, the number of transmission lines can be reduced.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of an apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram showing link mapping.

FIG. 3 is a diagram for explaining the operation of the embodiment of the present invention.

FIG. 4 is a block diagram of a conventional device.

FIG. 5 is a diagram showing a state in which a subscriber access device and a service node in a conventional example are connected.

[Explanation of symbols]

1 the central control device 21~2n service node 31~3n network 41~4n processor 51~5m subscriber access equipment 61~6m concentrator switch 71~7n message communication unit 8, 8 ₁ to 8 _m cross connects 81~8L subscriber Terminal device 91 to 9 m Multiplexer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 000005108 Hitachi Ltd. 4-6 Kanda Surugadai, Chiyoda-ku, Tokyo (72) Inventor Tadashi Mizuguchi 5-7-1, Shiba, Minato-ku, Tokyo NEC Corporation (72) Inventor Tsutomu Komatsubara 1-6 Uchiyuki-cho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Rei Sasaki 1-17-1 Toranomon, Minato-ku, Tokyo Oki Electric Industry Co., Ltd. (72) Nobuo Hasesaka, No. 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa, Fujitsu Limited (72) Inventor, Takuro Nakayama, 216, Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa

Claims (9)

[Claims] 1. A plurality of m each accommodating a subscriber terminal.
Subscriber access device, a plurality of n service nodes each providing a service to a subscriber terminal, and n connecting the subscriber access device and the service node to each other.
The central management device includes an xm cross-connect switch, a central management device that controls the cross-connect switch, and a communication unit that notifies each subscriber access device and each service node of the control status of the central management device. Is a subscriber accommodating system characterized by comprising control means for repeatedly transiting an interconnection state between the subscriber access device and the service node according to a preset pattern over time. 2. The control means according to claim 1, wherein all of the plurality of m subscriber access devices and all of the plurality n of service nodes are connected at least once during one repetition period. Subscriber accommodation method. 3. The subscriber accommodation system according to claim 1, wherein said control means is such that one subscriber access device is simultaneously connected to all service nodes at one time point. 4. The subscriber accommodation system according to claim 1, wherein at least a part of the subscriber access device comprises a concentrator switch for connecting a part of a plurality of L subscribers to the cross-connect switch. 5. The subscriber access device includes a message communication unit, the message communication unit is connected to the communication unit, and the message communication unit indicates the connection state of the cross-connect switch at that time to the concentrator switch. The subscriber accommodation system according to claim 4, further comprising means for transmitting the information to the subscriber terminal via the subscriber terminal. 6. The centralized management device comprises means for collecting the connection state of a concentrator switch of each subscriber access device via the communication means, each service node comprises a processor, and the processor comprises the communication means. 5. The subscriber accommodation system according to claim 4, wherein the centralized management device transmits the connection information of the concentrator switch to the communication means. 7. The subscriber accommodation system according to claim 1, wherein each of the service nodes includes a processor, and the processor is connected to the communication means. 8. The subscriber accommodation system according to claim 1, wherein the communication means for connecting the processor of the service node and the centralized management device is fixedly connected regardless of the connection of the cross-connect switch. 9. The subscriber accommodation system according to claim 1, wherein said subscriber terminal and said service node are provided with a buffer for temporarily storing information in order to transmit continuous information in a time division manner.