KR100805580B1 - Method for transmitting message between access network device and exchange - Google Patents

Abstract

The present invention relates to a method for transmitting a message between an access network device and a switching system, the method comprising: a first process of notifying a hook-flash attempt to a switching system by detecting a hook-flash attempt in an access network device with a first call call set up; And a second process of interworking with the notification of the hook-flash attempt in the switching system and setting a second call call by dial tone supply and digit reception by using a channel of a predetermined resource, so that the dialtone supply time is shortened. The present invention relates to a method for maximizing utilization, reducing processor load, saving limited resources, and providing good quality service to subscribers.

Description

Method for transmitting message between access network device and exchange

1 is a flow diagram of the exchange of messages for dial tone supply between a conventional access network device and a local exchange.

2 is a flow diagram of the exchange of messages for dial tone supply between an access network device and a local exchange in accordance with the present invention.

The present invention relates to a method for transmitting a message between an access network device and a switching system. More particularly, the present invention relates to a method of providing a dial tone using a channel of a predetermined resource by improving a call release and call setup procedure performed in the case of a hook-flash. The present invention relates to a message transmission method between an access network device and a switching system.

Recently, FTTC (Fiber To The Curb) is being built due to the efficiency of transmission path and optical facility of subscriber network, and access network system for this is being built.

In addition, as the access network is established, an interface for this, SNI (Service Node Interface), is being standardized and in use.

Representative SNI protocols include the North American Integrated Digital Loop Carrier (IDLC) protocol and the European V5.2 protocol. The difference between the two methods is based on how to multiplex 64 kbps, the digital basic unit of voice signals.

The European method uses the E-1 method (32 channels) for the primary digital hierarchy, and the T-1 method (24 channels) in North America.

The basic concept and function definition are the same except for the difference between the physical speed used and the channel to which the communication channel is allocated.

When the access network and the local exchange interoperate using the SNI interface, the status change monitoring of the subscriber line is performed in the access network based on the role sharing principle, and the change is converted into a predetermined protocol message to the local exchange. Send the relevant message through the connected communication channel.

In addition, the local exchange receives and analyzes its message and performs call processing similarly to a general subscriber connected directly to the local exchange.

In the case of an ordinary subscriber who is directly connected to the local exchange with an existing copper line, the dialtone will be resupplied when the subscriber attempts to make a call and the subscriber switches to hook-on / off or hook-flash after the local exchange supplies the dialtone. do.

In addition, if the calling subscriber is hooked on / off while busy, dialtone is provided unconditionally, and in case of hook-flash, the dialtone is supplied when the subscriber is not subscribed to additional services such as three-way call or call waiting. do.                         

This is because the subscriber attempts to retry the call, but it is determined that it is recognized as a hook-flash rather than a hook-on / off due to the short pressing time of the hook.

The exchange of messages for dial tone supply between the conventional access network device 100 and the local exchange 110 is performed as shown in FIG. 1.

First, when the originating subscriber attempts to make a call, the subscriber processing unit 10 transmits a call attempt message (FE_sub_seizure) to the V5.2 protocol processing unit 20 in the access network device 100 (S2).

Then, the V5.2 protocol processor 20 sends a call setup message (ESTABLISH) to the V5.2 protocol processor 30 in the local exchange 110 (S4) and receives a call setup confirmation message (ESTABLISH ACK). Proceed to the procedure (S6).

The V5.2 protocol processor 30 of the local exchange 110 sends a resource allocation message (ALLOCATION) for allocating an E-1 link resource to the V5.2 protocol processor 20 of the access network device 100. (S8) Allocate a resource by receiving a completion message (ALLOCATION COMP) (S10).

Then, the public telephone network subscriber processing unit 40 of the local exchange 110 supplies the dial tone to the subscriber processing unit 10 of the access network device 100 through the allocated resources (S12), and the subscriber processing unit of the access network device ( 10) receive a digit from (S14) and establish a call through the corresponding local exchange of the called party (S16).

After that, when the calling subscriber hook-flashes in the call state, the subscriber processing unit 10 of the access network device 100 transmits the hook-flash attempt message (FE_line_signal) to the V5.2 protocol processing unit 20 (S18). The V5.2 protocol processing unit 20 of the access network device 100 receiving the message sends a signal message (SIGNAL) indicating that the subscriber has hooked-flashed to the V5.2 protocol processing unit 30 of the local exchange 110. Inform the flash state (S20) and receive a confirmation message (SIGNAL ACK) (S22).

Then, the public telephone network subscriber processing unit 40 of the local exchange 110 checks whether the subscriber is registered to an additional service such as a three-way call or waiting for a call, and if the subscriber does not have a registered service, whether the subscriber is a calling party or a called party. Check it.

In the case where the hook-flash subscriber is the calling party, first, the V5.2 protocol processing unit 30 of the local exchange 110 receives a call previously set to the V5.2 protocol processing unit 20 of the access network device 110. A call release message (DISCONNECT) is sent (S24), and a resource allocation message (DEALLOCATION) is sent to the previously allocated E-1 link resource (S26).

Then, the V5.2 protocol processing unit 20 of the access network device 100 sends a call release completion message (DISCONNECT COMP) to the V5.2 protocol processing unit 30 of the local exchange 110 (S28), and resource allocation completion is completed. Send a message (DEALLOCATION COMP) (S30).

In this way, after releasing all preset incoming / outgoing call calls and releasing the allocated resources, the access network device 100 to reset the call for sending a dial tone to the calling party who attempted the hook-flash. V5.2 protocol processing unit 20 of) sends a call setup message (ESTABLISH) to V5.2 protocol processor 30 of local exchange 110 (S32) and receives a call setup confirmation message (ESTABLISH ACK) (S34). .

The V5.2 protocol processor 30 of the local exchange 110 sends a resource allocation message (ALLOCATION) for reallocating the E-1 link resource to the V5.2 protocol processor 20 of the access network device 100. The resource is allocated by receiving (S36) a completion message (ALLOCATION COMP) (S38).

Then, the public telephone network subscriber processing unit 40 of the local exchange 110 supplies the dial tone to the subscriber processing unit 10 of the access network device 100 through the reallocated resources (S40), and again access network device ( Receiving a digit from the subscriber processing unit 10 of 100) (S42) and establishes a call through the corresponding local exchange of the called subscriber (S44).

As described above, when the calling subscriber hook-flashes in a call state, when the subscriber is not subscribed to an additional service such as a three-way call or waiting call, the time when the subscriber tries to retry the call but presses the hook The dial tone is supplied because it is judged to be short and not recognized as a hook-off, but as a flash.

However, this procedure requires that the existing call is released and the call is reestablished. Therefore, there is a delay of 1 to 3 seconds of dial tone supply to the subscriber, which causes the subscriber to mistake the telephone line for a short time or failure. Is concerned.

In order to solve the above problems, an object of the present invention is to improve the message processing procedure of the access network device and the local exchange.                         

Another object of the present invention is to reduce the time during which a dialtone is transmitted to the calling party by improving the message processing procedure of the access network device and the local exchange.

Another object of the present invention is to reduce call processing load of the exchange and to improve voice quality of subscribers.

In order to achieve the above object, the present invention provides a first process of notifying the hook-flash attempt to the switching system by detecting a hook-flash attempt in the access network device, the first call call is set; And a second process of establishing a second call by dial tone supply and digit reception by using a channel of a predetermined resource in connection with the notification of the hook-flash attempt in the switching system.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 shows a flow diagram of the exchange of messages for dial tone supply between the access network device 200 and the local exchange 210 according to the present invention.

First, when the originating subscriber attempts to make a call, the subscriber processing unit 50 transmits a call attempt message (FE_sub_seizure) to the V5.2 protocol processing unit 60 in the access network device 200 (S52).

Then, the V5.2 protocol processor 60 sends a call setup message (ESTABLISH) to the V5.2 protocol processor 70 in the local exchange 210 (S54) and receives a call setup confirmation message (ESTABLISH ACK). Proceed to the procedure (S56).                     

The V5.2 protocol processing unit 70 of the local exchange 210 sends a resource allocation message (ALLOCATION) for allocating the E-1 link resource to the V5.2 protocol processing unit 60 of the access network device 200. (S58) The resource is allocated by receiving the completion message (ALLOCATION COMP) (S60).

Then, the public telephone network subscriber processing unit 80 of the local exchange 210 supplies the dial tone to the subscriber processing unit 50 of the access network apparatus 200 through the allocated resources (S62), and the subscriber processing unit of the access network apparatus ( Receive a digit from 50) (S64) and establish a call through the local exchange of the called party (S66).

After that, when the calling subscriber hook-flashes in the call state, the subscriber processing unit 50 of the access network device 200 transmits the hook-flash attempt message (FE_line_signal) to the V5.2 protocol processing unit 60 (S68). In response, the V5.2 protocol processor 60 of the access network device 200 sends a signal message (SIGNAL) indicating that the subscriber has hooked-flashed to the V5.2 protocol processor 70 of the local exchange 210. Inform the flash state (S70) and receive a confirmation message (SIGNAL ACK) (S72).

Then, the public telephone network subscriber processing unit 80 of the local exchange 210 checks whether the subscriber is a registered subscriber to an additional service such as a three-way call or a call waiting, and if the subscriber does not have a registered additional service, whether the subscriber is a calling party or a called party. Check it.

As a result of the above determination, if the calling party is the calling subscriber, the public telephone network subscriber processing unit 80 of the local exchange 210 releases the incoming call and inquires the E-1 link resource information for the previous call and accesses the access network device 200 through the channel. The dial tone is supplied to the subscriber processing unit 50 (S74).

Then, the digit is received from the subscriber processing unit 50 of the access network device 200 (S76) and a call is established through the corresponding local exchange of the called subscriber (S78).

As described above, according to the present invention, after detecting the hook-flash signal of the subscriber in the access network device 200, the local switch 210 omits the existing call release and call setup procedure, and then preset E-1 channel. Supply dialtone to subscribers.

Thus, the present invention has an effect of shortening the processing time by supplying a dial tone using a channel of a predetermined resource in the case of a hook-flash in a call state.

In addition, since the processing procedure is simple and can be processed within a short time, there is an effect of reducing the load on the processor and saving the limited resources to maximize the utilization.

Claims (4)

With the first call call set up, A first step of detecting a hook-flash attempt in the access network device to notify the switching system of the hook-flash attempt; And And a second process of interworking with the notification of the hook-flash attempt in the switching system and setting up a second call by dial tone supply and digit reception by using a channel of a predetermined resource. Method of sending messages between switching systems. The method of claim 1, And the preset resource channel is a channel of a resource used in the first call. The method of claim 1, The first process, A first step of detecting a hook-flash attempt when the first call is set; Providing a signaling message to a switching system in response to detecting the hook-flash attempt; And And a third step of providing acknowledgment of said signaling message to an access network device. The method of claim 3, wherein And the dial tone is supplied after acknowledging the signaling message.

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