KR101265210B1 - System for reducing communication band in voice over internet protocol network - Google Patents

Abstract

The present invention relates to a system for reducing a communication band in a VoIP communication network, and more particularly, to a system for reducing a communication band in a voice over internet protocol (VoIP) network including at least one media gateway (MG). And multiplexing the digital data received from one media gateway to another media gateway, or demultiplexing the multiplexed digital data received from another media gateway to one media gateway. The present invention relates to a system for reducing communication bandwidth in a VoIP communication network, comprising a first multiplexing / demultiplexing (MUX / DeMUX) device.

Description

System for reducing communication band in Voice over Internet Protocol network

The present invention relates to a system for reducing a communication bandwidth in a VoIP communication network, and more particularly, to add a multiplexing / demultiplexing device to a VoIP communication network, and to use multiplexed multiplexed digital packets by destination address at predetermined intervals. By reducing the bandwidth, the present invention relates to a communication band reduction system in a VoIP communication network that provides a more efficient and high quality VoIP communication network environment.

Voice over Internet Protocol (VoIP) is a technology that converts voice analog signals into digital packets (packets, the smallest unit of data communication) and transmits them through a network using an IP (Internet Protocol) address. Various services are provided through interworking of PSTN and Public Switched Telephone Network.

Currently, IP networks are established around the world, and the exchanges used for public telephone networks, private IP-based networks, or mobile communication networks for VoIP are being separated into soft switches and media gateways. . This is presented in The 3rd Generation Partnership Project (3GPP), The 3rd Generation Partnership Project 2 (3GPP2) and the International Telecommunication Union-Telecommunication standardization sector (ITU-T).

The signaling protocols currently used for VoIP implementation include H.323, Session Initiation Protocol (SIP), Media Gateway Control Protocol (MGCP), and Media Gateway Control (MEGACO). In this case, protocols for implementing VoIP may be classified into a media level protocol and a call processing and control protocol.

Conventionally, in order to reduce communication bandwidth in a communication system, various communication technologies are used. For example, during WEB communication using HTTP, content data is compressed in a gzip form and specified in a transmission header to receive the data. You can minimize the communication cost by reducing the communication usage of the Internet portal service provider by decompressing in the web browser. To this end, an apparatus for compressing a transmission header and content data may be further included in an external device.

However, in the field of VoIP, transmission data compression is often not performed due to the improvement of the performance of a communication network and a communication device due to a newly defined transmission protocol.

In particular, in the VoIP field, a large number of telephone-related signal information, control information, and media information are processed separately for each subscriber in an uncompressed form.

Media information itself is compressed using Voice Codec, but more data than actual data is added because each User Datagram Protocol (UDP) header and Internet Protocol (IP) header are added to every Real-time Transfer Protocol (RTP) packet. Alternatively, a header of equal size is overhead and the traffic to be used is increased, thus making it impossible to efficiently use a communication network.

In addition, millions of circuits are handled by media gateways and media gateway controllers in VoIP networks, and one media gateway can handle as many as 256 to as many as thousands of circuits. Through this, when a large number of generated data is immediately transmitted per line, very small packets are discontinuously disordered, and as the traffic increases, it is difficult to guarantee the quality of communication (QoS).

Korean Unexamined Patent Publication No. 2009-0123078 ("Method and System for Recognizing RTP Packet Loss in MEGACO-Based Communication Network", hereinafter referred to as reference 1) shows whether MEGACO (Media) loss of RTP packets transmitted and received between subscribers. A method of real-time transfer protocol (RTP) packet loss recognition in a MEGACO-based communication network is disclosed.

However, the prior art document 1 is a method for recognizing only loss of media information transmitted and received through a media gateway, and a method for reducing indiscriminate communication bands used while transferring a large number of data transmitted in thousands of lines per line, There is no mention of how to improve the service quality of the Internet backbone.

Korean Patent Publication No. 10-2009-0123087 (published date 2009.12.02.)

The present invention has been made to solve the problems of the prior art as described above, and an object of the present invention is to add a multiplexing / demultiplexing device to a VoIP network for discontinuously transmitting / receiving digital packets by a predetermined address per predetermined period. By reducing the communication band used by multiplexing, it is to provide a communication band reduction system in the VoIP communication network that can provide a more efficient and high quality VoIP communication network environment.

In a system for reducing a communication band in a VoIP communication network according to an embodiment of the present invention, a system for reducing a communication band in a voice over internet protocol (VoIP) communication network including at least one media gateway (MG), A first multiplexing / demultiplexing device (MUX / DeMUX) which multiplexes the digital data received from one media gateway and transmits it to the outside, or demultiplexes and receives the multiplexed digital data received from the outside to one media gateway Characterized in that comprises a.

Preferably, the first multiplexing / demultiplexing apparatus multiplexes the voice data, the synchronization information, and the time information of the digital data to the media gateway, or the voice data of the multiplexed digital data received from the media gateway, Demultiplexing the synchronization information and the time information.

Preferably, the first multiplexing / demultiplexing apparatus is programmed in the media gateway or is provided outside.

Preferably, the communication band reduction system in the VoIP communication network further includes a media gateway controller (MGC), and the first multiplexing / demultiplexing device is a call processing of the digital data transmitted from the media gateway. And multiplexing the data to the media gateway controller or demultiplexing the control data of the multiplexed digital data received from the media gateway controller and transferring the data to the media gateway controller.

Preferably, the media gateway controller includes a second multiplexing / demultiplexing (MUX / DeMUX) device that demultiplexes the call processing data received from the media gateway, or multiplexes and transmits the control data to the media gateway. Characterized in that the configuration.

Preferably, the second multiplexing / demultiplexing device is programmed in the media gateway controller or is provided outside.

According to the above-described configuration, a system for reducing a communication bandwidth in a VoIP communication network adds a multiplexing / demultiplexing (MUX / DeMUX) device in a VoIP communication network to multiplex digital packets that are discontinuously transmitted / received by a target address at predetermined intervals. This enables the transmission and reception, and thus reduces the communication band used, thereby providing a more efficient and excellent VoIP communication network environment.

In addition, as the communication bandwidth is reduced, there is an advantage that the traffic is reduced to manage the quality of communication (QoS) much more easily.

1 is a diagram illustrating communication between at least one media gateway of a system for reducing a communication bandwidth in a VoIP communication network according to an embodiment of the present invention.
2 is a diagram illustrating communication between a media gateway and a media gateway controller of a system for reducing a communication bandwidth in a VoIP communication network according to an embodiment of the present invention.
3 is a view showing a communication band reduction system in a VoIP communication network according to an embodiment of the present invention.

Hereinafter, a communication band reduction system in a VoIP communication network of the present invention will be described in detail with reference to the accompanying drawings. The drawings introduced below are provided by way of example so that the spirit of the invention to those skilled in the art can fully convey. Therefore, the present invention is not limited to the following drawings, but may be embodied in other forms. Also, like reference numerals denote like elements throughout the specification.

In this case, unless otherwise defined, technical terms and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In the following description and the accompanying drawings, A description of known functions and configurations that may unnecessarily obscure the description of the present invention will be omitted.

In addition, a system refers to a collection of components, including devices, mechanisms, and means that are organized and regularly interact to perform the required function.

As shown in FIG. 3, a system for reducing a communication bandwidth in a VoIP communication network according to an embodiment of the present invention includes a media gateway (MG) 11 to 1N, a media gateway controller (MGC) ( 20), comprising a first multiplexing / demultiplexing (MUX / DeMUX) device 31 to 3N and a second multiplexing / demultiplexing device 40,

According to an embodiment of the present invention, a system for reducing communication bandwidth in a VoIP communication network may include at least one of the first multiplexing / demultiplexing devices 31 to 1 at least one of the media gateways 11 to 1N, as shown in FIG. 1. 3N), a communication band used for VoIP communication between the media gateways 11 to 1N can be reduced, and as shown in FIG. 2, the second multiplexing to the media gateway controller 20 is performed. / Demultiplexer 40, which is used for VoIP communication between the media gateway controller 20 and the media gateways 11-1N provided with the first multiplexing / demultiplexing devices 31-3N. Communication band can be saved.

At this time, as shown in FIG. 3, VoIP communication between the media gateways 11 to 1N and VoIP communication between the media gateways 11 to 1N and the media gateway controller 20 may constitute one communication network. have.

The voice over internet protocol (VoIP) communication is performed by the media gateways 11 to 1N, call processing data generated from at least one VoIP terminal connected to the media gateways 11 to 1N, control data related thereto, and This means that communication is performed by converting voice data into a digital signal and transmitting / receiving it to the media gateways 11 to 1N or the media gateway controller 20.

At this time, the voice data generated in the VoIP terminal is sampled at 8KHz by a vocoder, compressed in 10-30 ms units, and then transmitted into a voice packet. The voice packet may further include an IP header, a UDP header, synchronization information, and time information in addition to voice data. The media gateways 11 to 1N may convert the voice packet into digital data and transmit the same to other media gateways 11 to 1N. However, even though the voice data is compressed by a vocoder, since header information is overhead than actual voice data by adding an IP header and a UDP header, the voice data is used in VoIP communication between the media gateways 11 to 1N. It is difficult to expect to reduce traffic.

Accordingly, in the system for reducing communication bandwidth in the VoIP communication network according to the embodiment of the present invention, as described above, the first multiplexing / demultiplexing devices 31 to 3N are connected to the respective media gateways 11 to 1N. In addition, by reducing the number of packets to process per hour, it is possible to increase the efficiency of the communication process.

In detail, the first multiplexing / demultiplexing devices 31 to 3N are provided in one of the media gateways 11 to 1N, and digital data transmitted from one of the media gateways 11 to 1N, namely, The digitally converted voice packet can be multiplexed and transmitted to the outside. At this time, the external means another media gateway 11 to 1N.

In addition, the media by demultiplexing the digital data transmitted from the first multiplexing / demultiplexing devices 31 to 3N included in one of the media gateways 11 to 1N, that is, the multiplexed digitally converted voice packet It can be delivered to the gateways 11 to 1N.

In this case, the first multiplexing / demultiplexing apparatuses 31 to 3N may multiplex the digitally converted voice packet by a destination address every predetermined period, and the first multiplexing / demultiplexing according to an embodiment of the present invention. The multiplexing devices 31 to 3N may multiplex and transmit the digitally converted voice packet every 10ms to 30ms. Through this, since the data having the same destination is transmitted in one packet every 10ms to 30ms, the number of packets used can be reduced, thereby reducing the communication band and increasing the efficiency of communication processing.

The first multiplexer / demultiplexer 31 to 3N multiplexes or demultiplexes voice data, synchronization information (sync_source), and time stamps in the digitally converted voice packet. It can transmit and receive between the media gateways 11 to 1N.

At this time, the first multiplexing / demultiplexing apparatuses 31 to 3N are programmed in the media gateways 11 to 1N in software or in an adapter form outside the media gateways 11 to 1N. It may be provided, which is just one embodiment of the present invention.

That is, in other words, in the VoIP communication between at least one of the media gateways 11 to 1N, the media gateways 11 to 1N digitally convert voice signals generated from at least one VoIP terminal, and convert the digitally converted voices. The packet may be delivered to the first multiplexing / demultiplexing devices 31 to 3N. The first multiplexer / demultiplexer 31 to 3N multiplexes the digitally converted voice packet received from the media gateways 11 to 1N by a destination address at predetermined intervals, and then the other media gateways 11 to 1N. ) May be transmitted to the first multiplexing / demultiplexing devices 31 to 3N. In addition, the first multiplexing / demultiplexing apparatuses 31 to 3N may demultiplex the received multiplexed digitally converted voice packet and transmit the demultiplexed digital packets to the media gateways 11 to 1N.

As a result, in the VoIP communication network between the media gateways 11 to 1N, data having the same destination address is transmitted and received through one multiplexed signal, thereby reducing the number of packets to be processed, thereby reducing the communication bandwidth. In addition, since there is no packet transmitted or received at any time, the quality of communication (QoS) is guaranteed and the efficiency of communication processing can be improved.

As described above, the system for reducing a communication bandwidth in the VoIP communication network may add the media gateway controller 20 to the VoIP communication between at least one or more media gateways 11 to 1N. .

The media gateway controller 20 may receive call processing data generated from the media gateways 11 to 1N, and transfer control data accordingly to the media gateways 11 to 1N.

At this time, the call processing data is a periodic polling characteristic that occurs in at least one VoIP terminal provided in the media gateways 11 to 1N, that is, the Internet terminal for the VoIP terminal to check the status. This means that the polling traffic is continuously generated. When the media gateways 11 to 1N include a plurality of the VoIP terminals, the number of packets increases and the efficiency of communication processing decreases. Becomes difficult.

Accordingly, the media gateway controller 20 according to an embodiment of the present invention may further include the second multiplexing / demultiplexing device 40, and the second multiplexing / demultiplexing device 40 is The media gateway controller 20 may be programmed in software or may be provided in the form of an adapter outside the media gateway controller 20. This is only one embodiment of the present invention.

As described above, in the VoIP communication between the media gateways 11 to 1N and the media gateway controller 20, the media gateways 11 to 1N send call processing data to the media gateway controller 20, The media gateway controller 20 may send control data according to the call processing data to the media gateways 11 to 1N.

At this time, when the media gateways 11 to 1N are provided with a plurality of VoIP terminals, various call processing data can be generated indiscriminately, so the media gateways 11 to 1N are calls generated from the VoIP terminals. Delivers the processing data to the first multiplexing / demultiplexing devices 31 to 3N, and the first multiplexing / demultiplexing devices 31 to 3N multiplexes the received call processing data at predetermined intervals to the media gateway controller ( 20 may be transmitted to the second multiplexing / demultiplexing device 40 of FIG.

In this case, the first multiplexing / demultiplexing apparatuses 31 to 3N may multiplex call processing data in 8 ms or 16 ms periods, which is a period according to a polling characteristic of a VoIP terminal, and an embodiment of the present invention. Is nothing.

The second multiplexing / demultiplexing apparatus 40 demultiplexes the received multiplexed call processing data and transmits the demultiplexed call processing data to the media gateway controller 20, and the media gateway controller 20 controls according to the call processing data. Data may be sent to the second multiplexer / demultiplexer 40.

At this time, the second multiplexing / demultiplexing apparatus 40 multiplexes the control data by a target address at predetermined intervals, and the first multiplexing / demultiplexing apparatuses 31 to 1 provided in the media gateways 11 to 1N. 3N), and the first multiplexing / demultiplexing devices 31 to 3N may demultiplex the received control data and deliver the received control data to the media gateways 11 to 1N.

In this way, the call processing data is multiplexed according to a predetermined period in the VoIP communication network between the media gateways 11 to 1N and the media gateway controller 20, or the control data having the same destination address is transmitted or received to be transmitted or received. The number of packets to be reduced can be reduced, thereby reducing the communication band.

In addition, since there is no packet transmitted or received at any time, the quality of communication (QoS) is guaranteed, and the efficiency of communication processing can be improved.

That is, in other words, the system for reducing communication bandwidth in the VoIP communication network according to an embodiment of the present invention includes the first multiplexing / demultiplexing devices 31 to 3N at the media gateways 11 to 1N. Voice data generated from multiple VoIP terminals connected to the media gateways 11 to 1N are multiplexed and transmitted to the first multiplexing / demultiplexing devices 31 to 3N of the other media gateways 11 to 1N, or Alternatively, the call processing data generated by the VoIP terminal may be multiplexed and transmitted to the second multiplexer / demultiplexer 40 of the media gateway controller 20.

On the contrary, the first multiplexing / demultiplexing apparatuses 31 to 3N may receive the multiplexed voice data, demultiplex it, and deliver the multiplexed voice data to the media gateways 11 to 1N. Demultiplexing may be performed to the media gateways 11 to 1N.

The second multiplexing / demultiplexing apparatus 40 may receive the multiplexed call processing data, demultiplex it, and deliver the multiplexed call processing data to the media gateway controller 20. 1N) to the first multiplexing / demultiplexing devices 31 to 3N.

Through this, since the data having the same destination address is transmitted and received through a single multiplexed signal in a predetermined period in the VoIP communication network, the number of packets processed per unit time is reduced, and the communication bandwidth can be reduced accordingly, thereby enabling effective bandwidth. Can be maximized to maximize the efficiency of communication processing. In addition, since there is no packet transmitted or received at any time, it is easy to manage the quality of communication (QoS).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And various modifications and changes may be made thereto by those skilled in the art to which the present invention pertains.

Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .

11 to 1N: Media Gateway (MG, Media Gateway) (N is an integer of 1 or more)
20: Media Gateway Controller (MGC)
31 to 3N: first multiplexing / demultiplexing apparatus
40: second multiplexing / demultiplexing device

Claims (6)

In a system for reducing communication bandwidth in a Voice over Internet Protocol (VoIP) communication network including at least one media gateway (MG) and a media gateway controller (MGC),
The media gateway is configured to include a first multiplexing / demultiplexing (MUX / DeMUX) device,
The first multiplexing / demultiplexing device
Voice data, synchronization information, and time information of digital data received from one media gateway are multiplexed by a destination address at predetermined intervals, and then transmitted to another media gateway,
Demultiplexing the voice data, synchronization information, and time information of the multiplexed digital data received from the media gateway to one media gateway;
or,
The call processing data of the digital data received from the media gateway is multiplexed at a predetermined period and transmitted to the media gateway controller,
Demultiplexing the control data of the multiplexed digital data received from the media gateway controller and delivering the demultiplexed control data to the media gateway,
The media gateway controller is configured to include a second multiplexing / demultiplexing (MUX / DeMUX) device,
The second multiplexing / demultiplexing device
Demultiplexing call processing data of the digital data received from the first multiplexing / demultiplexing apparatus of the media gateway,
And a control data of the digital data is multiplexed by a target address at predetermined intervals and transmitted to the first multiplexing / demultiplexing device of the media gateway.
delete The method of claim 1,
The first multiplexing / demultiplexing device
The communication bandwidth reduction system in the VoIP communication network, characterized in that the software is programmed in the media gateway or provided outside.
delete delete The method of claim 1,
The second multiplexing / demultiplexing device
The communication bandwidth reduction system in the VoIP communication network, characterized in that the software is programmed in the media gateway controller or provided outside.

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