WO2011069385A1

WO2011069385A1 - Method and apparatus for dynamically selecting service bearer network

Info

Publication number: WO2011069385A1
Application number: PCT/CN2010/077417
Authority: WO
Inventors: 李炜; 王波; 李原
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-12-10
Filing date: 2010-09-28
Publication date: 2011-06-16
Also published as: CN101742012A

Abstract

A method and apparatus for dynamically selecting service bearer network are provided in the present invention. The method includes: presetting a preferred service bearer network and the condition of switching service bearer network; monitoring the service bearer quality of the preferred service bearer network in real time; the media gateway receives a signaling message from a user side; when the signaling message is determined to be the first message of a call, determining whether the monitored service bearer quality of the preferred service bearer network meets the condition of switching service bearer network, and selecting, according to the determination, a service bearer network for transmitting the services related to the signaling message. With the present invention, the service bearer network is selected dynamically by monitoring the service bearer quality of the service bearer network, instead of simply using either of the IP network and the Public Switched Telephone Network (PSTN), which reaches the goal of improving the service quality and the service success ratio.

Description

Method and device for dynamically selecting service bearer network

The present invention relates to a method and apparatus for dynamically selecting a service bearer network for a call by a specific condition on an MG (Media Gateway) device under an NGN (Next Generation Network) architecture. Background technique

PSTN (Public Switched Telephone Network) is a telecommunications network with TDM (Time Division Multiplexing), circuit switching as the information exchange, and telephone service as the main service. PSTN also provides some simple data services such as fax.

NGN is based on SS (Soft Switch) and provides a comprehensive open network architecture based on packet technology including voice, data, video and multimedia services. In a sense, NGN is the product of PTSN voice network and IP (Internet Protocol)-based packet network convergence, which makes it possible to integrate voice, video, data and other services on a new generation network. NGN can provide a variety of services including voice, data, and multimedia on the current network. It can also introduce low-cost IP phones that are currently used for long-distance calls into local calls, greatly reducing the cost and price of local calls.

In the NGN architecture, the MG receives the signaling from the user side and forwards it through the IP network. However, if a network storm, network congestion, or network equipment failure occurs, the quality of the call will be degraded and the call will be interrupted. The existing methods for solving such problems in the NGN architecture include the SS disaster recovery mode, ISUP (Integrated Services Digital Network User Part), but these methods are established between the SS and the MG. Under the premise of signaling interruption, if the IP network has a large congestion, it has seriously affected the voice quality and the call, but the letter Without interruption, the above means will not work. At the same time, although NGN has been commercialized on a large scale, there are still a large number of PSTN devices in the existing network, and it is necessary to make better use of these existing devices. Summary of the invention

The technical problem to be solved by the present invention is to provide a method and device for dynamically selecting a service bearer network, and to extend the existing NGN gateway model. The signaling from the user side can be forwarded through the PSTN in addition to being forwarded in the IP network.

In order to solve the above technical problem, the present invention provides a method for dynamically selecting a service bearer network to improve voice quality, and the method includes:

Presetting the conditions of the preferred service bearer network and the handover service bearer network;

Monitoring the service bearer quality of the preferred service bearer network in real time;

Receiving a signaling message from the user side;

When it is determined that the signaling message is the first message in a call, it is determined whether the service bearer quality of the monitored preferred service bearer network satisfies the condition of the handover service bearer network, and according to the judgment result, a service bearer network is selected for use. Transmitting traffic related to the signaling message.

Further, the steps of the preset preferred service bearer network and the condition for switching the service bearer network include:

Presetting one of the IP network and the PSTN as the preferred service bearer network, and the other as the low priority network;

The specific parameters of the service bearer quality are configured, and the service bearer network switches from the preferred service bearer network to the low priority network when the condition of the specific parameter is met.

Further, the method further includes:

When it is judged that the signaling message is not the first message in a call, the network selected according to the first message in the call is used instead of being reselected.

Further, the determining whether the service bearer quality of the preferred service bearer network meets the condition of the handover service bearer network, and selecting a service bearer network according to the judgment result For transmitting a service related to the signaling message, including:

When the result of the determination is that the current service bearer quality of the preferred service bearer network does not meet the condition of the switch service bearer network, the preset preferred service bearer network is selected to transmit the service related to the signaling message.

Further, the step of selecting a service bearer network for transmitting the service related to the signaling message according to the judgment result further includes:

When the result of the judgment is that the current service bearer quality of the preferred service bearer network has reached the condition of switching the service bearer network, the low priority network is selected to transmit the service related to the signaling message.

In order to solve the above technical problem, the present invention further provides a device for dynamically selecting a service bearer network to improve voice quality, which is disposed on a media gateway, and includes: a configuration module, a network monitoring module, a network interface module, and a signaling module; ,

a configuration module, configured to preset a condition of a preferred service bearer network and a service bearer network; a network monitoring module, configured to monitor a service bearer quality of the preferred service bearer network in real time; and a network interface module, configured to receive a message from the user side And the signaling module is configured to: when determining that the signaling message is the first message in a call, determining whether the service bearer quality of the monitored preferred service bearer network meets the handover service bearer The condition of the network, according to the judgment result, selects a service bearer network for transmitting the service related to the signaling message.

Further, the configuration module is configured to preset one of the IP network and the PSTN as the preferred service bearer network, and the other one is set as the low priority network; When the conditions of the specific parameters are met, the service bearer network switches from the preferred service bearer network to the low priority network.

Further, the signaling module is configured to: when determining that the signaling message is not the first message in a call, use a network selected according to the first message in the call, and no longer New choice.

Further, the signaling module is configured to: when the current service bearer quality of the preferred service bearer network does not reach the condition of the handover service bearer network, select the preset preferred service bearer network for transmission. The service related to the signaling message; when the result of the determination is that the current service bearer quality of the preferred service bearer network has reached the condition of the handover service bearer network, the low priority network is selected to transmit the service related to the signaling message. .

The device further includes a service control module, configured to receive a signaling message sent by the signaling module when the current service bearer quality of the preferred service bearer network has reached the condition of the handover service bearer network, and the number in the signaling message Performing an analysis to obtain the destination office direction of the information message, and sending the destination office direction to the signaling module;

The signaling module is further configured to construct narrowband signaling according to the destination office direction, and send the narrowband signaling through the low priority network.

Compared with the prior art, the present invention extends the signaling forwarding capability from the user side on the MG, dynamically monitors the service bearer quality of the service bearer network, and dynamically selects the service bearer network instead of using the IP network or the PSTN alone. A certain network, thereby achieving the purpose of improving service quality and business success rate. DRAWINGS

FIG. 1 is a flowchart of a method for dynamically selecting a service bearer network to improve voice quality according to an embodiment of the present invention.

FIG. 2 is a structural diagram of an apparatus for dynamically selecting a service bearer network to improve voice quality according to an embodiment of the present invention.

FIG. 3 is a flowchart of a method for dynamically selecting a service bearer network to improve voice quality according to an application example of the present invention. detailed description

The main idea of the present invention is to dynamically select whether to use the PSTN outgoing call or the IP network outgoing call according to the current actual situation of the service bearer network, so as to reasonably utilize the existing network device and improve the service quality.

The invention will now be described in greater detail with reference to the drawings and specific embodiments.

1 is a flow chart of a method for dynamically selecting a service bearer network to improve voice quality according to the present invention. As shown in Figure 1, the service bearer network is selected by using the present invention, which specifically includes:

Step 101: The media gateway presets a condition of the preferred service bearer network and the handover service bearer network.

Step 102: The media gateway monitors the service bearer quality of the preferred service bearer network in real time. Step 103: When receiving the signaling message from the user side, the media gateway sends the signal to the signaling module by the network interface module.

Step 104: When determining that the signaling message is the first message in a call, the signaling module determines whether the service bearer quality of the monitored preferred service bearer network satisfies the condition of the handover service bearer network, and selects according to the judgment result. A service bearer network is used to transmit services related to the signaling message.

The first message in the one of the calls, such as: an IAM (Initial Address Message) message in ISUP signaling, a SETUP message in Q.931 signaling, and the like.

Specifically, in step 101, the media gateway presets a preferred service bearer network and a condition for switching the service bearer network, including:

Step 1011: Pre-set one of the IP network and the PSTN as the preferred service bearer network. In an actual application, the IP network can be set as a high-priority network, and the PSTN can be set as a low-priority network.

Step 1012: Configure specific parameters of the service bearer quality, and preset, when the condition of the specific parameter is met, the service bearer network switches from the high priority network to the low priority network; for example, setting The handover reference condition is PSQM (Perceptual Speech Quality Measurement). When the average PSQM is > 1.8, the service bearer network needs to be switched to the PSTN.

In step 104, the following processing is further included:

If the signaling message is not the first message in a call, the service bearer network selected according to the first message in the call is used instead of being reselected; the reason for this is that processing a call requires complete Signaling process. If the signaling messages in a signaling process are sent through different service bearer networks, the received signaling messages are incomplete or out of order at the end node, affecting normal calls.

In step 104, the determining whether the service bearer quality of the preferred service bearer network meets the condition of the handover service bearer network, and selecting a service bearer network for transmitting the service related to the signaling message according to the judgment result, including :

Step 1041: When the result of the determination is that the current service bearer quality of the preferred service bearer network does not meet the condition of the handover service bearer network, the preset preferred service bearer network is selected to transmit the service related to the signaling message. ;

Step 1042: When the result of the determination is that the current service bearer quality of the preferred service bearer network has reached the condition of the handover service bearer network, the low priority network is selected to transmit the service related to the signaling message.

As shown in FIG. 2, the device for dynamically selecting a service bearer network to improve voice quality is disposed in a media gateway, and includes: a configuration module, a network monitoring module, a network interface module, and a signaling module;

a configuration module, configured to preset a condition of a preferred service bearer network and a service bearer network; a network monitoring module, configured to monitor a service bearer quality of the preferred service bearer network in real time; and a network interface module, configured to receive a message from the user side And the signaling module is configured to: when determining that the signaling message is the first message in a call, determining whether the service bearer quality of the monitored preferred service bearer network meets the handover service bearer network The condition of the network, according to the judgment result, selects a service bearer network for transmitting the service related to the signaling message.

In a preferred embodiment of the present invention, the configuration module is configured to preset one of an IP network and a PSTN as a preferred service bearer network, and configure a specific parameter of the service bearer quality, and preset to meet the specific parameter. The condition of the service bearer network is switched from the preferred service bearer network to the low priority network.

In a preferred embodiment of the present invention, the signaling module is configured to: when it is determined that the signaling message is not the first message in a call, use a service bearer selected according to the first message in the call. Network, and no longer re-select.

In a preferred embodiment of the present invention, the signaling module is configured to select the preset preference when the current service bearer quality of the preferred service bearer network does not reach the condition of the handover service bearer network. The service bearer network is configured to transmit the service related to the signaling message; when the result of the judgment is that the current service bearer quality of the preferred service bearer network has reached the condition of the handover service bearer network, the low priority network is selected for transmission and the Signaling message related services.

The device further includes a service control module, configured to receive a signaling message sent by the signaling module when the current service bearer quality of the preferred service bearer network has reached the condition of the handover service bearer network, and perform the signaling message sent by the signaling module. After analyzing, the destination office direction of the information message is obtained, and the destination office direction is sent to the signaling module, and the signaling module constructs narrowband signaling according to the destination office direction, and sends the narrowband signaling through the low priority network. Specifically, the signaling module sends the narrowband signaling to the network interface module, and then the network interface module sends out through the PSTN.

The technical solutions of the present invention are exemplarily described below through examples in specific applications.

FIG. 3 is a flowchart of an application example of the present invention. As shown in FIG. 3, the example includes: Step 301: Configure data required for selecting a service bearer network.

Step 302, the MG receives a signaling message, and the network interface module sends the received signaling message. To the signaling module.

Step 303: The signaling module is responsible for parsing the signaling message.

Step 304: The signaling module obtains current service bearer status information of the IP network by using the network monitoring module.

Step 305: The signaling module forwards the signaling message according to the current service bearer status information of the IP network.

Further, the step of configuring data required for selecting a service bearer network includes:

Step 3011: Configure a preferred service carrier network. In this example, the configured preferred service network is an IP network.

Step 3012: Configure a condition for switching the service bearer network. In this example, the configuration is based on

ITU-T (ITU Telecommunication Standardization Sector) P.861 ( Objective quality measurement of telephone - band (300-3400 Hz ) speech codecs, speech band (300-3 ⁴ 00Hz) speech codec Objective quality measurement), when the average PSQM is greater than 1.8, the service bearer network needs to be switched to the PSTN.

Further, the step of the signaling module being responsible for parsing the signaling message includes:

Step 3031: Determine whether the signaling message is the first message in a call. In this example, the signaling message is the first message in a call (such as an IAM message in ISUP signaling, in Q.931 signaling). If the SETUP message is the same, the process proceeds to step 304, where the current service bearer status information of the IP network is obtained;

Step 3032: When the signaling message is not the first message in a call, the signaling message is sent from the previously selected network.

Further, the step of the signaling module forwarding the signaling message according to the current service bearer status information of the IP network includes:

Steps 3051~3052, determining whether the PSQM is 1.8. If the PSQM <1.8 is learned from the network monitoring module, the signaling module will pass the corresponding adaptation protocol in the IP network (such as M3UA, IUA, etc.). Sending the signaling message over the IP network;

Step 3053, if the PSQM > 1.8 is learned from the network monitoring module, the signaling module sends the signaling message to the service control module, and the service control module analyzes the number in the signaling message to obtain the destination office direction of the signaling message, and The destination office is sent to the signaling module;

Step 3054: The signaling module constructs narrowband signaling according to the destination office direction, and sends the narrowband signaling through the PSTN. Specifically, the signaling module sends the narrowband signaling to the network interface module, and then the network interface module sends the packet through the PSTN.

The invention may, of course, be embodied in a variety of embodiments without departing from the spirit and scope of the invention.

Claims

Claim

A method for dynamically selecting a service bearer network, the method comprising: presetting a preferred service bearer network and a condition for switching a service bearer network;

Receiving a signaling message from the user side;

The method for dynamically selecting a service bearer network according to claim 1, wherein the step of presetting a preferred service bearer network and a condition for switching a service bearer network comprises: a network interconnection protocol IP network and a public One of the switched telephone networks PSTN is preset as a preferred service bearer network, and the other one is set as a low priority network;

The method of dynamically selecting a service bearer network according to claim 1, wherein the method further comprises:

When it is judged that the signaling message is not the first message in a call, the network selected according to the first message in the call is used.

The method for dynamically selecting a service bearer network according to claim 1, wherein the determining whether the service bearer quality of the preferred service bearer network satisfies the condition of the handover service bearer network, and selecting one according to the judgment result The service bearer network is configured to transmit services related to the signaling message, including:

When the result of the determination is that the current service bearer quality of the preferred service bearer network does not meet the conditions of the handover service bearer network, the preset preferred service bearer network is selected for transmission. Transmit the service associated with the signaling message.

The method for dynamically selecting a service bearer network according to claim 4, wherein the step of selecting a service bearer network for transmitting a service related to the signaling message according to the judgment result further comprises:

When the result of the judgment is that the current service bearer quality of the preferred service bearer network has reached the condition of the handover service bearer network, the low priority network is selected to transmit the service related to the signaling message.

A device for dynamically selecting a service bearer network, which is disposed in a media gateway, wherein the device includes: a configuration module, a network monitoring module, a network interface module, and a signaling module;

a configuration module, configured to preset a condition of a preferred service bearer network and a service bearer network; and a network monitoring module, configured to monitor a service bearer quality of the preferred service bearer network in real time;

a network interface module, configured to receive a signaling message from the user side and forward the signal to the signaling module, where the signaling module is configured to determine the monitored preference when determining that the signaling message is the first message in a call Whether the service bearer quality of the service bearer network satisfies the condition of the handover service bearer network, and according to the judgment result, a service bearer network is selected to transmit the service related to the signaling message.

The apparatus for dynamically selecting a service bearer network according to claim 6, wherein the configuration module is configured to preset one of an IP network and a PSTN as a preferred service bearer network, and the other one is set to be low. Priority network; configures the specific parameters of the service bearer quality. The service bearer network switches from the preferred service bearer network to the low priority network when the condition of the specific parameter is met.

The device for dynamically selecting a service bearer network according to claim 6, wherein the signaling module is configured to: when determining that the signaling message is not the first one in a call When the message is used, the network selected according to the first message in the call is used.

The apparatus for dynamically selecting a service bearer network according to claim 6, wherein the signaling module is configured to: when the result of the determination is that the current service bearer quality of the preferred service bearer network does not reach the handover service bearer network And the preset preferred service bearer network is used to transmit the service related to the signaling message; when the result of the determination is that the current service bearer quality of the preferred service bearer network has reached the condition of switching the service bearer network, A low priority network is selected for transmitting traffic associated with the signaling message.

The device for dynamically selecting a service bearer network according to claim 9, wherein the device further includes a service control module, configured to: when a current service bearer quality of the preferred service bearer network has reached a condition for switching the service bearer network Receiving the signaling message sent by the signaling module, and analyzing the number in the signaling message, obtaining the destination office direction of the information message, and sending the destination office direction to the signaling module;

The signaling module is further configured to construct narrowband signaling according to the destination direction, and send the narrowband signaling through the low priority network.