JPS6347304B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a call diversion method in a packet switching network, and particularly to a call diversion method to a storage device accommodated in a packet switching network.

A conventional method for diverting calls to a storage device in this type of packet switching network will be explained below with reference to FIGS. 1 and 2. General subscribers T1 and T2 are connected to packet switching centers N1 and N2, respectively, and a storage device S1 is connected to packet switching center N1. Furthermore, general subscriber T1 of the packet network
has subscriber number 4521234, subscriber T2 has subscriber number 3421234, and storage device S1 is given a special number of 114.

Here, communication between general subscriber T1 and general subscriber T2 via storage device S1 is assumed. As shown in the signal sequence in Figure 2, general subscriber T1
sets the special number 114 of the storage device S1 as the destination number in the call setup request packet P1, sends it to the packet switching center N1, establishes a call with the storage device S1, and then calls the incoming general subscriber as the second dial. The number 3421234 of T2 was set in the first information packet and sent to the storage device S1. After that, storage device S
After receiving all the information packets from the originating general subscriber T1, No. 1 constructs a call setup request packet P2 using the number 3421234 of the terminating general subscriber T2 set in the first information packet, and T2
A call was established between them and the processed and accumulated information packets were sent.

Therefore, in the conventional system, setting up a call to the incoming general subscriber T2 via the storage device S1 is complicated;
Further, there are disadvantages in that the number of information packets for second dial transmission and second dial delivery confirmation increases, and that the method for specifying the incoming general subscriber number is different from when setting up a call that does not go through the storage device S1.

The present invention has been made in view of the above drawbacks, and its purpose is to specify the incoming general subscriber number with only the first dial and to set up a call with respect to the connection with the incoming general subscriber via the storage device. By instructing call diversion to the storage device using a special field in the request packet, the above disadvantages are solved, and the method of specifying the incoming general subscriber number is the same when setting up a call that does not go through the storage device. The object of the present invention is to provide a call diversion method to the device.

That is, the present invention provides a packet switching network that includes a bucket switching center connected to general subscribers and a storage device connected to the switching center. A storage device detour request display is defined in the special field, and the packet switching center performs routing and call control to the storage device based on the storage device bypass request display in the special field. It is something.

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

FIG. 3 is a block diagram of a packet switching network for explaining one embodiment of the system of the present invention. Further, FIG. 4 is a packet call setting sequence diagram for explaining this embodiment.

First, the configuration of the present invention will be explained with reference to FIG. In the figure, general subscribers T1 and T2 are connected to packet switching centers N1 and N2, respectively, and a storage device S1 is connected to packet switching center N1. Furthermore, general subscriber T1 of the packet network
has subscriber number 4521234, and general subscriber T2 has subscriber number 4521234.
Has a subscriber number of 3421234. Here, as the call detour instruction information to the storage device S1, * is defined in a special field in the call setting request packet P3.

Next, assuming communication between general subscriber T1 and general subscriber T2 via storage device S1, the operation of the system of the present invention will be explained with reference to FIG. 4 as well.

As shown in the signal sequence of FIG. 4, the general subscriber T1 sends the call setting request by setting the number 3421234 of the destination subscriber T2 as the destination number in the call setting request packet P3 and also adding the call diversion instruction information * to the storage device S1. Each special field in the packet P3 is set and sent to the packet switching center N1. Packet switching center N1
establishes a call between the general subscriber T1 and the storage device S1 by routing the call setting request packet P3 to the storage device S1 based on the call diversion instruction information * in the special field in the call setting request packet P3. .

After receiving all the information packets from the general subscriber T1, the storage device S1 deletes the call diversion instruction information * in the special field in the received call setup request packet P3 to make the call setup request packet P4, and sends this to the packet switching center N1. send to The packet switching center N1 routes the call setup request packet P4 to the destination subscriber accommodation center N2 using the destination number in the call setup request packet P4. The packet switching center N2 determines the destination number
3421234 calls general subscriber T2,
A call is established between storage device S1 and general subscriber T2. Thereafter, the storage device S1 transmits the processed and stored information packets to the general subscriber T2. Thereby, communication between the general subscriber T1 and the general subscriber T2 is performed via the storage device S1.

On the other hand, general subscriber T1 who does not go through storage device S1
When communicating with the general subscriber T2, the general subscriber T1 sets only the number 3421234 of the destination subscriber T2 as the destination number in a call setup request packet and sends it to the packet switching center N1.

As explained above, the present invention defines a storage device bypass request indication in a special field in a call setup request packet, and allows the packet switching network to perform routing and call control according to the storage device bypass request indication without using a second dial. This simplifies call setup for general subscribers via the storage device, and
This eliminates the need for information packets for dial transmission, and has the effect that the method of specifying the destination subscriber number is the same as when setting up a call without going through a storage device.

[Brief explanation of the drawing]

Figure 1 is a block diagram of a packet switching network to explain the conventional method of diverting calls to storage devices, Figure 2 is a signal sequence diagram to explain the conventional method, and Figure 3 is a diagram of a signal sequence diagram to explain the conventional method.
The figure is a block diagram of a packet switching network for explaining an embodiment of the present invention, and FIG. 4 is a signal sequence diagram for explaining an embodiment of the present invention. T1, T2... general subscriber, N1, N2... exchange, S1... storage device, P1, P2, P3, P4...
Call setup request packet.

Claims (1)

[Claims] 1. A packet switching center connected to general subscribers;
In a packet switching network configured with a storage device connected to the switching center, a storage device bypass request indication is defined in a special field in a call setup request packet from a general subscriber, and the packet switching center A method for detouring calls to a storage device in a packet switching network, characterized in that routing and call control to the storage device are performed by displaying a request for detouring to the storage device in the special field.