CN101622855B - A method for realizing associated channel rering line signalling in the next generation network - Google Patents

Abstract

The present invention provides a method for implementing channel-associated re-ringing line signaling in the next generation network. The specific steps include defining re-ringing events and signals, and establishing a channel-associated signaling between the calling user and the called user. After the call is made, if the called party hangs up, the softswitch notifies the calling gateway to detect the re-ringing event. If the calling user wants to talk to the called user again, the calling gateway detects the re-ringing signal and sends Report the re-ring event, and the softswitch notifies the called gateway to send a re-ring signal. After the called user rings, if the called user picks up the phone, the calling user and the called user talk again.

Description

A method for implementing ringing-associated line signaling in next-generation networks

technical field

The invention relates to the field of NGN (Next Generation Network, next generation network) network, in particular to a method for realizing inter-office ring-associated re-ringing line signaling under the cooperation of a soft switch and a gateway.

Background technique

The so-called channel-associated signaling is a signaling between exchanges, that is, the voice information and the corresponding signaling are transmitted on the same channel, and the control signals required by the channel are transmitted from the channel itself or the party that has a fixed connection with it. signaling channel to transmit. The channel-associated signaling is composed of two parts: the line signaling and the register signaling: the line signaling mainly transmits the occupation, response, and disconnection of some relevant trunk lines; the register signaling is through the " Register", its main function is to transfer address information.

Taking China No.1 Roadsong as an example, the realization of a Roadsong signaling in PSTN (Public Switched Telephone Network) is described. Figure 1 is the basic exchange process of channel-associated signaling between offices in the PSTN, where 1, 2, 9 and 10 are line signaling, and 3, 4, 5, 6, 7 and 8 are register signaling.

In the existing NGN network, the SoftSwitch SS (SoftSwitch) defines a series of packets through the H.248 protocol, and the event (event) and signal (signal) are defined in the packet to control the media gateway MG to realize the signaling of channel-associated signaling interact. The package is used to define the relevant operations on the endpoint of the channel-associated type. The events in the package are used to define a series of channel-associated signaling that the softswitch SS needs to be detected by the media gateway MG (MediaGate). The signals in the package are used to define a series of softswitches. Switching SS requires channel-associated signaling sent by the media gateway. Relevant H.248 packages include icas, bcas and r2 packages, etc., among which bcas package defines events and signals such as occupancy (sz), occupancy confirmation (sza) and off-hook (ans) to realize the detection of these channel-associated signaling and report softswitch SS; events and signals such as forward hang-up (cf), backward hang-up (cb) and called state (sls) are defined in the icas package to realize the sending and reporting of these channel-associated signaling to the softswitch SS; Register-related events and signals (addr) are defined in the r2 package.

Realize the basic channel-associated call flow in an NGN network as shown in Figure 2, wherein the softswitch SS controls the media gateway MG through the H.248 protocol to realize channel-associated signaling interaction. In the H.248 protocol, a transaction (Transaction) generally requires The three-way handshake information, here for the convenience of description, only the request information is used to illustrate this embodiment. Switching office 1 is the switching office where the calling operator is located, and switching office 2 is the switching office where the called user is located. The main signaling interaction process is as follows:

201: The softswitch notifies the gateway B where the called user is located to detect the forward occupation event (bcas/sz);

202: The softswitch notifies the gateway A where the calling user is located to detect the forward occupation event (bcas/sz);

203: Gateway A reports a forward occupation event (bcas/sz) to the softswitch;

204: The softswitch notifies the gateway A to send the occupancy confirmation signal (bcas/sza), and at the same time notifies the gateway A to detect the number (r2/r2addr);

205: gateway A reports the number (r2/r2addr) to the softswitch;

206: The softswitch notifies gateway A to create a calling context;

207: The softswitch notifies gateway B to create a called call context;

208: The softswitch notifies the gateway B to send an occupation signal (bcas/sz), and detects an occupation confirmation event (bcas/sza);

209: Gateway B reports the occupancy confirmation event (bcas/sza) to the softswitch;

210: The softswitch notifies the gateway B to send the number (r2/r2addr), and simultaneously detects off-hook events (bcas/ans) and idle events (icas/sls);

211: gateway B reports an idle signal (icas/sls) to the softswitch;

212: The softswitch notifies gateway A to send the called idle signal (icas/sls);

213: Gateway B reports off-hook (bcas/ans) to the softswitch;

214: The softswitch notifies gateway A to detect hangup (icas/cb, icas/cf);

215: The softswitch notifies the gateway B to detect on-hook (icas/cb, icas/cf);

In the PSTN, if the operator calls the called user through the inter-office channel-associated signaling, after the called party hangs up, the operator can call the called user again by ringing the inter-office channel-associated signal again.

The following uses FIG. 3 to illustrate the signaling interaction process in which the operator re-calls the called party through the called ringing line signal after the called party hangs up in the PSTN. Wherein, switching office 1 is the switching office where the calling operator is located, and switching office 2 is the switching office where the called user is located. The channel-associated connection in the PSTN does not require the intervention of the media gateway control protocol H.248, and can be completed through a re-ringing line signaling.

However, in the NGN network, the re-ringing line signaling of the channel-associated signaling is currently not supported between the soft switch SS and the media gateway MG.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method for implementing ring-associated ringing line signaling between a soft switch SS and a media gateway MG in an NGN network.

In order to solve the above-mentioned technical problems, the present invention provides a method for implementing ring-associated re-ringing line signaling in the next generation network, the specific steps include, defining re-ringing events and signals, between the calling user and the called user After establishing a call through channel-associated signaling, if the called user hangs up, the softswitch notifies the calling gateway to detect the re-ringing event. If the calling user wants to talk to the called user again, the calling gateway detects the re-ringing event. After the ring signal, report the re-ring event to the softswitch, and the softswitch notifies the called gateway to send the re-ring signal. After the called user rings, if the called user picks up the phone, the calling user and the called user talk again .

Further, the above method may also have the following features, the calling user is a call operator or a general user. Further, the above method can also have the following characteristics, in the step of defining the re-ringing event and signal: define the re-ringing event and signal in the package of the H.248 protocol, or define a new package to define the re-ringing event and signal described re-ring events and signals.

Further, the above method can also have the following characteristics, in the step of defining the re-ringing event and signal in the packet of the H.248 protocol: the re-ringing event is defined in the bcas packet of the H.248 protocol Ringing events and signals.

Further, the above-mentioned method can also have the following characteristics, and the method specifically includes the following steps:

401: After the call is established between the calling user and the called user through channel-associated signaling, the called user hangs up, and the softswitch notifies the calling gateway to send the called user's hang-up signal, and at the same time notifies the calling gateway to detect the re-ringing event;

402: If the calling user needs to talk to the called user again, the calling gateway will report the ringing event to the softswitch after detecting the ringing signal of the calling user;

404: After receiving the re-ringing event reported by the calling gateway, the softswitch notifies the called gateway to send a re-ringing signal to the called user, so that the called user rings again, and at the same time notifies the called gateway to detect that the called user picks up the phone event;

405: The called gateway reports the detected off-hook event of the called user to the softswitch;

406: The softswitch notifies the called gateway to detect the hang-up event of the called user;

407: The softswitch notifies the calling gateway to detect the hang-up event of the calling user, and the calling user and the called user enter into a call.

The present invention provides a method for realizing re-ringing of channel-associated signaling in NGN network, and realizes the detection, reporting and re-ringing of re-ringing events in NGN network by extending the H.248 protocol The sending of the signal.

Figure overview

Figure 1 is the basic interactive flow of channel-associated signaling between existing PSTN central offices;

Fig. 2 is the signaling interaction flow diagram of implementing channel-associated signaling through the H.248 protocol in the existing NGN network;

Fig. 3 is the signaling interaction flow chart of the calling operator ringing again after the called party hangs up in the PSTN;

Fig. 4 is a flow chart of signaling interaction between the calling operator and the calling operator ringing again after the called party hangs up when the H.248 protocol is adopted between the softswitch and the gateway in the NGN network of the present invention.

Preferred Embodiments of the Invention

The present invention adopts following technical scheme:

Still use the bcas package to realize the terminal operation of the road-associated type, add a re-ringing event and signal in the bcas package, and define it as rering, then:

If the two parties of the call—the calling user and the called user—establish a call through channel-associated signaling, then after the call, if the called user hangs up, the softswitch notifies the calling gateway that the called party hangs up, and detects the calling gateway. Calling user re-ringing event (bcas/rering), if the calling user wants to talk to the called user again, the calling gateway will report the re-ringing event (bcas/rering) to the softswitch after detecting the re-ringing signal of the calling user /rering), the softswitch notifies the called gateway to send a rering signal (bcas/rering), the called user rings, and if the called user picks up the phone, the calling user and the called user talk again.

In the case that the rering event and signal have been defined, and the calling operator has established a call with the called user through inter-office road-associated signaling, the specific implementation of the present invention will be described in conjunction with FIG. 4, wherein gateway B is the called gateway, and the gateway A is the calling gateway.

401: After the call, the called user hangs up, and gateway B detects the called user's hang-up signal and reports the called user's hang-up signal to the softswitch;

402: The softswitch notifies the gateway A to send the called on-hook signal (icas/cb), and at the same time notifies the gateway A to detect the re-ringing event (bcas/rering);

The calling operator is a kind of calling user. The range of calling users is wider, including various users. The re-ringing signal generally occurs between the operator user and the ordinary user. Of course, it is not limited to the operator, and it can be other general users. . An operator is used here to illustrate this embodiment.

If the calling operator needs to speak to the called party again:

403: Gateway A reports a rering event (bcas/rering) to the softswitch after detecting the reringing signal of the calling operator;

404: After the softswitch receives the reringing event reported by gateway A, the softswitch notifies gateway B to send a reringing signal (bcas/rering) to let the called user ring again, and at the same time notifies gateway B to detect that the called user picks up the phone event(bcas/ans);

405: After the gateway B detects that the called user goes off-hook, it reports to the softswitch that the called user goes off-hook (bcas/ans);

406: The softswitch notifies the gateway B to detect the called user hang-up event (icas/cb, icas/cf);

407: The softswitch notifies the gateway A to detect the on-hook event (icas/cb, icas/cf) of the calling user, and the calling operator and the called user enter into a conversation.

The above re-ringing events and signals can also be implemented without using the bcas package, but using other existing packages or newly defined packages. Packages are mainly for convenience.

Industrial Applicability

Adopting the present invention can realize the application of the caller's re-ringing associated line signal in the NGN network, and realize the detection, reporting and re-ringing of the re-ringing event by expanding the content of the associated signaling in the H.248 protocol The sending of the signal.

Claims (5)

1. A method for realizing the ringing-associated circuit signaling in next generation network, is characterized in that, described method comprises the following steps: Define re-ringing events and signals. After the calling user and the called user establish a call through channel-associated signaling for a conversation, if the called user hangs up, the softswitch will notify the calling gateway to detect the re-ringing event. If the If the calling user wants to talk to the called user again, the calling gateway will report the ringing event to the softswitch after detecting the ringing signal again, and the softswitch will notify the called gateway to send the ringing signal again, and the called user will ring Afterwards, if the called user picks up the phone, the calling user and the called user talk again. 2. The method according to claim 1, wherein the calling user is a calling operator or a general user. 3. The method according to claim 1, wherein in the step of defining re-ringing events and signals: The re-ringing event and signal are defined in the package of the H.248 protocol, or the re-ringing event and signal are defined in a custom package. 4. The method according to claim 3, characterized in that, in the step of defining the re-ringing event and signal in the package of the H.248 protocol: The re-ringing event and signal are defined in the bcas package in the H.248 protocol. 5. The method according to any one of claims 1 to 4, wherein the method specifically comprises the steps of: 401: After the call is established between the calling user and the called user through channel-associated signaling, the called user hangs up, and the softswitch notifies the calling gateway to send the called user's hang-up signal, and at the same time notifies the calling gateway to detect the re-ringing event; 402: If the calling user needs to talk to the called user again, the calling gateway will report the ringing event to the softswitch after detecting the ringing signal of the calling user; 404: After receiving the re-ringing event reported by the calling gateway, the softswitch notifies the called gateway to send a re-ringing signal to the called user, so that the called user rings again, and at the same time notifies the called gateway to detect that the called user picks up the phone event; 405: The called gateway reports the detected off-hook event of the called user to the softswitch; 406: The softswitch notifies the called gateway to detect the hang-up event of the called user; 407: The softswitch notifies the calling gateway to detect the hang-up event of the calling user, and the calling user and the called user enter into a call.

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