KR100491887B1 - internet channel processing device of the VoIP system and controlling method therefore - Google Patents

Abstract

As described above, the present invention connects an Ethernet device to a voice packet processor board composed of redundancy of a VoIP system to perform communication with the Internet network, and obtains MAC information from an active board, thereby creating a real channel, thereby obtaining IP from the Internet. MAC table that can obtain related information is managed only on the active board, so communication is executed through the channel through the created channel, thus maximizing resource savings of the VoIP system.

Description

Internet channel processing device of the VoIP system and controlling method therefore}

The present invention relates to an Internet channel processing apparatus and a control method thereof of a VoIP system. In particular, an Ethernet device is connected to a voice packet processor board configured with redundancy of a VoIP system to perform communication with the Internet network. The present invention relates to an Internet channel processing apparatus of a VoIP system for generating a real channel by obtaining MAC information, and a control method thereof.

In general, VoIP (voice over IP [Internet Protocol]) system is a term referring to IP telephony technology for a series of facilities for transmitting voice information using IP. In addition, the VoIP system means that voice information is transmitted in a digital form in discontinuous packets, rather than a circuit-based traditional protocol such as a public switched telephone network (PSTN). The main advantage of VoIP and Internet telephony technology is that it integrates telephone service by utilizing existing IP network so that telephone users can receive long distance and international telephone service in internet environment with only local call charge. In addition, the VoIP system uses Cisco and Vocaltek through VoIP forums to encourage the use of ITU-T H.323, a standard for transmitting voice and sound over IP over the public Internet or intranets within the enterprise. And major equipment manufacturers such as 3Com and NetSpeak. The VoIP Forum also encouraged directory service standards, enabling users to locate other users and enabling the use of touch phone signals for automatic telephone distribution and voicemail. By the way, the VoIP system as described above is typically duplicated call processing boards to prevent the disconnection of the call.

Then, referring to the VoIP system including the conventional redundant board as described above with reference to FIG. 1, a TDM for switching voice signals input from a plurality of subscriber boards 70A-N to a higher board or performing the reverse process thereof. Voice data composed of a switch (Time Division Multiplexer swithch) 71 and PCM data switched by the TDM switch 71, compressed with a destination address, and carried on a channel generated by a header, and configured as active and standby duplication. A main processor 73 for controlling the connection and transfer function of the voice data processing board 72A-B, including a processing board 72A-B and a switching function of the TDM switch 71; and the main processor 73 Signal link transmission unit 74 for transmitting the PCM data processed by the voice data processing board 72A-B set to active under the control of the "

On the other hand, referring to the operation of the VoIP system 76 including the conventional redundant board as described above, first, any one of the voice data processing board 72A-B configured as redundancy in the main processor 73 as Active, the rest Set to Stand-bye. In addition, the main processor 73 allows the connection information of the TDM switch 71 to be assigned to all the redundant boards 72A-B operating in an active / stand-bye manner. At this time, the main processor 73 switches the PCM data input from the subscriber and the E1 boards 70A-N through the TDM switch 71 and inputs it to the voice data processing board 72A that is currently active. Then, the active board 72A compresses the PCM data switched by the TDM switch 71, attaches the destination address to the header, and loads it on the generated channel to the signal link transmission unit 74. The signal link transmission unit 74 transmits PCM data processed by the voice data processing board 72A set to active under the function control of the main processor 73 to the linked destination. Since the data cannot be transmitted, the data is transmitted via the Internet transmission device 75 linked to the outside.

In this case, for example, in the case of ATM duplication, the main processor 73 designates all the VP / VC required for ATM routing to both the Active / Stand-bye boards 72A-B. For example, when channel 0 of PCM sub-highway of the active board of the TDM switch is designated as channel 1 of PCM sub-highway,

The stand-bye board is also routed so that channel 1 connection of sub-highway of channel 0 of sub-highway 0 is maintained even after the transfer. Accordingly, since the redundant board 72A-B has a bypass type PCM signal, the path of the PCM is maintained even when the PCM signal is switched. In addition, in case of ATM, if the VP / VC of channel 0 of TDM 0 sub-highway of the active board 72A is set to 0/0 in the case of ATM, the stand-bye board is also designated as described above. do. Therefore, even if the active board 72A is transferred, channel 0 of sub-highway 0 is transmitted to 0 VP / 0 VC. At this time, the connection information of the redundant board 72A is all transferred to the active / stand-bye 72A-B by the main processor 73, and the signals and information channels necessary for switching between the two boards 72A-B are transferred. Exchanged. Here, the signals required for the switching are Act signals, Function fail signals, Board open signals, etc. of the opponent board. In addition, the information transmitted to the information channel is necessary information other than the switching signal, not actual connection information, and most of the connection information is not included.

In the case of the subscriber control or the E1 boards 70A-N, in most cases, there is no information channel, and the ATM board mainly exchanges link information exchange for ATM link redundancy. At this time, the board 72B operated by the stand-bye always maintains channel connection information even when not connected to an actual link or subscriber.

However, the VoIP system including the conventional redundant board as described above has only a structure for transmitting PCM voice data through a redundant board, so that the current call is simply assigned to the stand-bye board 72B. Although the channel can be maintained, it is not connected to the real IP network. Therefore, in case of the IP signal, the required information of the destination is not known at all, and the same link cannot be shared with the existing PSTN network. In order to solve the problem, since only a separate signal link transmitter 74 is connected to the signal link transmitter 74, IP signal service cannot be properly performed.

Accordingly, the present invention has been invented to solve the above-mentioned conventional problems. Since the MAC table, which can obtain IP-related information from the Internet, is managed only on an active board, communication is performed to the Internet through a channel generated accordingly. It is an object of the present invention to provide an Internet channel processing apparatus and a control method of the VoIP system that can maximize the resource saving of the system.

Another object of the present invention is to transfer the IP-related information generated by the MAC table of the active board to the standby board of the same structure to share the same, so that the IP channel call connection function can be performed smoothly without the VoIP system is down during the transfer. The present invention provides an internet channel processing apparatus and a control method of the VoIP system, which can significantly improve the operation reliability of the VoIP system.

The present invention for achieving the above object is a TDM switch for switching the voice signal input from a plurality of subscriber boards to the upper board or the reverse process, and compressing the PCM data switched by the TDM switch Next, a voice packet processor composed of active and standby duplication is transmitted to the channel generated by the MAC address of the designated IP address found through the ARP function, and the active packet among the redundant voice packet processors The main processor gives an IP address to the voice packet processor and controls channel creation / removal and switching functions, and an Internet interface for transmitting IP data processed by the voice packet processor set to active under the function control of the main processor through the Internet network. The present invention provides an internet channel processing apparatus of a VoIP system.

Another feature of the present invention is a channel generation checking step of checking whether a signal for generating a channel is input from a main processor of the current VoIP system, and an active board when a channel generation request signal is input by the channel generation checking step. The active board channel generation step of obtaining a MAC address of an IP address through the ARP function and then generating a channel using the ARP function, and a data generation channel transmitting data to the corresponding IP address through the channel generated after the active board channel generation step. After the data transmission channel and the data generation channel transmission step, the standby board channel forced generation of forcibly creating a channel having the same condition in the standby board by transferring the property, IP, and MAC address of the channel currently successful from the active board to the standby board. Provided is a control method of an internet channel processing apparatus of a VoIP system.

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

The apparatus of the present invention is a TDM switch (2) for switching the voice signals input from the plurality of subscriber boards (1A-N) to the upper board or the reverse process as shown in Figure 2, and the TDM switch ( 2) Compresses PCM data switched by 2), and transfers the corresponding destination address to the channel created by the MAC address of the designated IP address found through the ARP (ADDRESS RESOLUTION PROTOCOL) function, and consists of the redundancy of active and standby. And a main processor for providing an IP address to the active voice packet processor among the redundant voice packet processors 3A-B and controlling channel creation / removal and switching functions (4). And an internet interface 6 for transmitting IP data processed by the voice packet processors 3A-B set to active under the function control of the main processor 4 through the internet network 5.

Herein, the voice packet processor 3A, which is active among the voice packet processors 3A-B, communicates with the redundant channel when the channel is normally generated by the MAC address information of the designated IP address found through the ARP function. The voice packet processor 3B operated by standby transmits the channel property, IP, and MAC address to force the creation of the same channel. On the other hand, if the channel removal is required, the channel removal is forcibly executed.

Next, a control method applied to the apparatus of the present invention as described above will be described.

The method of the present invention proceeds from the initial state S1 to the data transmission step S2 as shown in FIG. 4 and transmits data or receives data over the Internet. After the data transmission step (S2), it proceeds to the channel generation determination step (S3) to determine whether a signal for requesting to create a channel from the main processor of the current VoIP system is input. At this time, if a signal for requesting to create a channel is input from the main processor of the current VoIP system as a result of the determination during the channel generation determination step (S3), the process proceeds to the active board channel generation step (S5) and the active board only through the ARP function. Get the MAC address of the IP address and use it to create a channel. After the active board channel generation step S5, the data generation channel transmission step S6 is performed to transmit data to the corresponding IP address through the generated channel. In addition, after the data generation channel transmission step (S6), and proceeds to the standby board channel forced generation step (S7) to pass the attribute of the currently successful channel from the active board to the standby board, IP and MAC address forcibly Create a channel on the standby board.

On the other hand, if it is determined during the channel generation determination step (S3) that a signal for requesting to create a channel is not input from the main processor of the current VoIP system, the process proceeds to the channel removal determination step (S4) from the main processor of the current VoIP system. It is determined whether a signal is input that requires the channel to be removed. At this time, if it is determined during the channel removal determining step (S4) that the current signal is not input to request to remove the channel from the main processor of the VoIP system is terminated.

However, if the signal is determined to be removed from the main processor of the current VoIP system as a result of the determination during the channel removal determination step (S4), proceed to the active board channel removal step (S8) to remove the channel designated by the active board. do. After the active board channel removing step (S8), the standby board channel forced removal step (S9) is performed to force the removal of the channel designated as the standby board from the active board to remove the corresponding channel set in the standby board. Remove

That is, in the main processor 4, any one of the redundant voice packet processors 3A-B is set to Active and the rest to Stand-bye. In addition, the main processor 4 causes the connection information of the TDM switch 2 to be assigned to all the redundant boards 3A-B operating in an active / stand-bye manner. The main processor 4 switches the PCM data input from the subscriber boards 1A-N through the TDM switch 2 when the PCM data is input from the subscriber boards 1A-N to the TDM switch 2. To the voice packet board 3A that is currently active.

Here, the main processor 4 gives an IP address only to the voice packet processor 3A currently operating in the active mode and requests to allocate a channel. Then, the voice packet processor 3A executes the ARP process using the designated IP address. In this case, the voice packet processor 3A in the active mode sends an IP packet as shown in FIG. The structure is loaded on a broadcasting MAC (FF-FF-FF-FF-FF-FF) and transmitted to the Internet network 5 through the Internet interface unit 6. Then, in an arbitrary system (not shown) that receives an ARP request through the Internet network 5, if its IP is the same as the requesting IP, the ARP response is inserted into the Internet interface unit of the VoIP system 7. Via (6), it transmits to the audio packet processor 3A in the active mode.

In this case, since there is no special procedure for notifying whether the MAC address of the system is changed as above, the MAC address obtained by ARP is usually deleted after 30 seconds after the last packet is used, and then the ARP procedure is performed again.

In the above process, if a system with the same MAC exists in the same network, the MAC address of the system giving the ARP response is used first. Due to the characteristics of the IP network, it is impossible to know which system responds first, It is not possible to confirm whether to respond again in the next step. Therefore, MAC addresses on the same network cannot be shared.

On the other hand, the active voice packet processor 3A, which obtains the MAC address of the IP address through the ARP function, creates a channel using the MAC address of the IP address and then compresses the PCM data switched to the channel. Then, the destination address is attached to the header and loaded on the generated channel and outputted to the Internet interface unit 6. Then, the Internet interface unit 6 transmits the IP data processed by the voice packet processor 3A set to active under the function control of the main processor 4 to the corresponding IP address via the Internet network 5. .

On the other hand, the active voice packet processor 3A during the transmission process, if the channel generation is successful, the attributes of the channel designated by the voice packet processor 3B currently operating in a standby state through the redundant channel, IP, MAC By passing the address, the standby voice packet processor 3B forcibly creates a channel having the same condition as the active voice packet processor 3A. Therefore, even if the active voice packet processor 3A is switched, the standby voice packet processor 3B has the same information and thus the call connection is not lost.

On the other hand, during the process, the active voice packet processor 3A removes the specified specific channel when it receives a command to remove the specific channel from the main processor 4. After the active voice packet processor 3A removes its own channel, the active voice packet processor 3A requests the voice packet processor 3B operating in standby mode to remove the designated channel. Then, the voice packet processor 3B operating in the standby forcibly removes the corresponding channel at the request of the voice packet processor 3A which is active.

Here, since the voice packet processor 3B operating in standby processes only the successful channel processing of the active voice packet processor 3A according to the above procedure, no state mismatch occurs between them. In addition, the main processor 4 manages only the channel currently being used.

As described in the above description, the present invention enables communication with the Internet network by connecting an Ethernet device to a voice packet processor board composed of redundancy of a VoIP system, and obtains MAC information from an active board to generate a real channel. The MAC table that can obtain IP-related information from the active board is managed only on the active board, so the communication is executed through the Internet, which has the advantage of maximizing the resource savings of the VoIP system.

In addition, according to the present invention, since the IP-related information generated by the MAC table of the active board is also transferred to the standby board of the same structure to share the same, the IP channel call connection function can be smoothly performed without the VoIP system being down during the transfer. As a result, the operation reliability of the VoIP system is also significantly improved.

On the other hand, the present invention is not limited to the above-described embodiment and the accompanying drawings, it is usually possible in the technical field to which various substitutions, conversions and changes within the scope without departing from the spirit of the present invention. It will be evident to those who have knowledge of.

1 is an explanatory diagram illustrating a conventional redundant VoIP system.

2 is an explanatory diagram illustrating a redundant VoIP system of the present invention.

3 is an explanatory diagram illustrating a VoIP IP PACKET structure of a VoIP system.

4 is a flowchart of the present invention.

<Detailed Description of Codes>

1: Subscriber Board 2: TDM Switch

3A-B: Redundant Voicepacket Processor 4: Main Processor

5: Internet network 6: Ethernet interface unit

7: VoIP system

Claims (4)

A TDM switch that switches voice signals input from multiple subscriber boards to a higher board or vice versa, compresses PCM data switched by the TDM switch, and then designates a specified IP address obtained through the ARP function. It transmits the corresponding destination address on the channel generated by MAC address, and gives an IP address to the voice packet processor composed of active and standby duplication, and the active voice packet processor among the duplexed voice packet processors. Internet channel of the VoIP system, characterized in that the main processor for controlling the removal and transfer function, and the Internet interface unit for transmitting the IP data processed by the voice packet processor set to active under the control of the main processor over the Internet network. Processing unit. The voice packet processor of claim 1, wherein the voice packet processor in the active mode is a voice packet processor operating in a standby mode through a redundant channel when a channel is normally generated by MAC address information of a designated IP address obtained through an ARP function. Internet channel processing apparatus of the VoIP system, characterized in that it further includes a function for forcibly creating the same channel by passing the property, IP, and MAC address, and forcibly removing the channel if necessary to remove the channel. . A channel generation check step for checking whether a signal for creating a channel is input from the main processor of the current VoIP system, and when a channel generation request signal is input by the channel generation check step, the IP is activated through the ARP function only on the active board. An active board channel generation step of obtaining a MAC address of the address and generating a channel using the same; and a data generation channel transmission step of transmitting data to a corresponding IP address through a channel generated after the active board channel generation step; After the create channel transmission step, the standby board channel forced generation step is performed to forcibly create a channel with the same condition in the standby board by passing the property, IP, and MAC address of the currently successful channel from the active board to the standby board. A control method of an internet channel processing apparatus of a VoIP system. The channel generation checking step of claim 3, wherein if the channel generation request signal is not input from the main processor of the current VoIP system, the channel determining step determines whether a signal for requesting to remove the channel from the main processor of the current VoIP system is input. The active board channel removing step of removing the designated channel from the active board when the channel removal request signal is input from the main processor as a result of the removing decision step and the channel removing determining step. And a standby board channel forced removal step of removing the corresponding channel set in the standby board by forcibly removing the channel designated as the standby board.