KR101403033B1 - METHOD AND SYSTEM FOR OPTIMIZING No.7 SIGNAL LOUTING USING IP NETWORK - Google Patents

Abstract

A system and method for routing a No. 7 signal using an Internet network are provided. The system for routing the No. 7 signal using the Internet network receives the No. 7 signal from the exchange and receives the No. 7 signal and converts it into a usable packet signal in the Internet network. A soft switch for routing a No. 7 signal converted into a packet signal, and a No. 7 signal from the signal relay point to route to the soft switch, receiving a No. 7 signal converted into the packet signal from the soft switch And a signaling gateway for routing to a peer signaling gateway through the Internet network, wherein the signaling gateway accesses the Internet network using an MTP2 peer-to-peer adaptation layer (M2PA) protocol.

Description

TECHNICAL FIELD [0001] The present invention relates to a method and system for optimizing a number 7 signal routing using an Internet network,

The present invention relates to a method and system for optimizing routing, and more particularly to a method and apparatus for optimizing No. 7 signal routing using an Internet network.

As the general subscriber and the out-of-area exchange function are integrated into the broadband convergence network BcN (Broadband Convergence Network), a signaling gateway (SGW), which is a matching device with the existing signal network, is required for all call processing controlled by the soft switch. As a result, the signal network becomes complicated and the signal transmission interval increases.

1 is a flowchart showing a conventional No. 7 signal routing process.

In the conventional No. 7 signal routing process, a NO. 7 signal is generated in a first local exchange (LE) 11 and then is routed to a first signal relaying point (STP) (S101).

After step S101, the NO.7 signal is routed from the first signal relay point 21 to the first signaling gateway (SGW) 31 (S102).

After step S102, the NO.7 signal is routed from the first signal gateway 31 to the first soft switch 41 (S103).

After the step S103, the NO.7 signal is generated in the first soft switch 41, and then the NO.7 signal is again routed to the first signal gateway 31 (S104).

After step S104, the NO.7 signal is routed from the first signal gateway 31 to the first signal relay point 21 (S105).

After step S105, the NO.7 signal is routed from the first signal relay point 21 to the second signal relay point 22 (S106).

After step S106, the NO.7 signal is routed from the second signal relay point 22 to the second signal gateway 32 (S107).

After step S107, the NO.7 signal is routed from the second signal gateway 32 to the second soft switch 42 (step S108).

After step S108, the NO.7 signal is generated at the second soft switch 42, and then the NO.7 signal is again routed to the second signal gateway 32 (S109).

After step S109, the NO.7 signal is routed from the second signal gateway 32 to the second signal relay point 22 (S110).

After step S110, the process proceeds to step S111 where the NO.7 signal is generated at the second signal relay point 22 and then the signal is routed to the second exchange 12.

As shown in FIG. 1, for all call processing controlled by the first soft switch 41 and the second soft switch 42, the first signal gateway 31 and the second signal gateway 31, There is a problem that the signal gateway 32 is required, thereby complicating the signal network hierarchy and increasing the signal transmission interval.

In order to solve the problems of the above-described conventional techniques, the present invention provides a signal routing method using an existing E1 transmission path, instead of the signal routing method of No. 7, a signaling gateway (SGW) M2PA (MTP2 peer- Peer Adaptation Layer < / RTI > protocol to optimize No. 7 signal routing over the Internet.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood from the following description.

In order to achieve the above object, a system for routing a No. 7 signal using an Internet network according to an aspect of the present invention includes a signal relay point for receiving and routing a No. 7 signal from an exchange, A soft switch for receiving and converting the packet signal into a usable packet signal, routing the No. 7 signal converted into the packet signal, and a No. 7 signal from the signal relay point to route to the soft switch, And a signal gateway for receiving the No. 7 signal converted from the soft switch to the packet signal and routing the signal to the peer signal gateway through the Internet network, wherein the signal gateway includes an MTP2 Peer-to-Peer Adaptation Layer (M2PA) ) Protocol to the Internet.

In order to achieve the above object, a system for routing a No. 7 signal using an Internet network according to another aspect of the present invention includes a No. 7 signal converted into a packet signal from a peer signal gateway through an Internet network, A signal switch for receiving the signal and for routing the No. 7 signal, a soft switch for receiving the No. 7 signal and converting the signal to a usable signal form in a No. 7 signaling network, And a signal relay point for receiving the converted No. 7 signal and routing the converted No. 7 signal to the exchange. The signal gateway accesses the Internet network using an MTP2 peer-to-peer adaptation layer (M2PA) protocol.

In order to achieve the above object, a method for routing a No. 7 signal using an Internet network according to an aspect of the present invention includes the steps of (a) generating a No. 7 signal at a first exchange and routing it to a first signal relay point (B) routing the No. 7 signal to the first signal gateway (131) at the first signal relay point; (c) transmitting the No. 7 signal from the first signal gateway to the first software gateway (D) converting the No. 7 signal from the first soft switch to a packet signal usable in the Internet network, and routing the No. 7 signal converted into the packet signal to the first signal gateway And (e) routing, at the first signaling gateway, the No. 7 signal converted into the packet signal to a second signaling gateway, which is a peer signaling gateway, via the Internet network, 1 signal The gateway accesses the Internet using an M2PA (MTP2 Peer-to-Peer Adaptation Layer) protocol.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. It is provided to fully inform the owner of the scope of the invention.

According to the method of optimizing the No. 7 signal routing using the Internet network of the present invention and the method of solving the system, instead of the No. 7 signal routing method using the existing E1 transmission path, It is possible to optimize No. 7 signal routing through the Internet network using the M2PA (MTP2 Peer-to-Peer Adaptation Layer) protocol of a connected signaling gateway (SGW).

In addition, it is possible to improve the call quality by shortening the call connection time by decreasing the signal transmission interval for the call processing of the local, suburban and international telephone calls.

In addition, since the transmission path E1 for signal transmission is not required, and the hardware (board) to which the E1 is connected in the SGW is not necessary, the cost can be saved by simplifying the network.

Also, even if the signal traffic increases, additional E1 transmission expansion work is not needed by using IP network.

In addition, since the signal traffic is transmitted to the Internet network, the stability and reliability of the signal can be ensured.

1 is a flowchart showing a conventional No. 7 signal routing process.
FIG. 2 is a diagram illustrating a configuration of a system for optimizing the routing of a No. 7 signal using an Internet network according to an embodiment of the present invention. Referring to FIG.
3 is a flowchart illustrating a process of optimizing the routing of the No. 7 signal using the Internet according to an exemplary embodiment of the present invention.
4 is a diagram showing a hierarchical structure of No. 7 protocol for explaining the M2PA protocol.
5 is a diagram showing the structure of the M2PA protocol.
FIG. 6 is a diagram illustrating a conventional signal network routing scheme applied to the field.
FIG. 7 is a diagram illustrating a method for optimizing No. 7 routing using an Internet network according to an embodiment of the present invention, applied to a site shown in FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.

The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

For reference, throughout the specification, when a part is referred to as being "connected" to another part, it is understood that it is not only "directly connected" but also "electrically connected" .

Also, when an element is referred to as "comprising ", it means that it can include other elements as well, without departing from the other elements unless specifically stated otherwise.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

FIG. 2 is a diagram illustrating a configuration of a system for optimizing the routing of a No. 7 signal using an Internet network according to an embodiment of the present invention. Referring to FIG.

The system for optimizing the No. 7 signal routing using the Internet according to an embodiment of the present invention includes first and second local exchange (LE) 111 and 112, first and second signal relay points Signaling Transport Point (STP) 121 and 122, Signaling GateWay (SGW) 131 and 132, SoftSWitch (SSW) 141 and 142, (IP network) 150.

For reference, the No. 7 signaling system is a common channel, called Common Channel Singing (CCS) in the sense of exchanging signals for a plurality of channels. Various signals and information It can be regarded as a type of data communication characterized for transmission.

This signaling method is optimized for operation in digital networks and satisfies the interprocessor communication requirements for call control, remote control, management and maintenance signals in the current and future communication networks, and provides information without duplication or loss. And provides a means for reliable delivery in order.

In general, the No. 7 signaling system (No. 7 signaling system) was initially considered for call control of telephone service. However, as it was introduced for the advancement of telephone service and signal network of ISDN (Integrated Services Digital Network) (Open System Interconnection) reference model.

Compared to No. 6 signaling method of the International Telecommunications Union, Telecommunication sector (ITU-T), No. 7 signaling method features up to 4096 lines and 4.8 or 64 Kbps digital transmission lines And a signaling message is transmitted in a variable length (up to 272 bytes) signaling unit.

No.7 signaling is specified in the Recommendation Q.700 series. This layering was made up of functional blocks called level at the time of call, but each level 1 of OSI reference model is layer 1, level 2 is layer 2, part of level 3 and level 4 is layer 3, And layer 4 to layer 7.

In the No. 7 signal system, unlike an existing communication method in which both a call path and a signal path are used together, a common signal line is used in which a plurality of voice signals transmit and receive signal information through independent lower channels, Signal system. A network using this No. 7 signaling system is called a No. 7 signaling network.

The first exchanger 111 generates a No. 7 signal and routes it to the first signal relay point 121. The second exchanger 112 routes the second signal from the second signal relay point 122 to No. 7 signal.

On the other hand, the first and second signal relay points 121 and 122 are signaling entities distinguished in the No. 7 signal network and are also referred to as signaling points.

The first signal relay point 121 receives the No. 7 signal from the first switch 111 and routes it to the first signal gateway 131 and the second signal relay point 122 is the second signal gateway 132, And routes the signal to the second exchange 112. The second switch 112 is connected to the second switch 112,

The first and second signal gateways 131 and 132 convert the signals of the No. 7 signal network and the signals of the Internet network 150 to use each other.

The first signal gateway 131 receives the No. 7 signal from the first signal relay point 121 and routes it to the first soft switch 141 and receives the No. 7 signal from the first soft switch 141 And routes it to the second signal gateway 132.

At this time, the first signal gateway 131 transmits the No. 7 signal received from the first soft switch 141 through the Internet network 150 using the M2PA (MTP2 Peer-to-Peer Adaptation Layer) And may be routed to the signal gateway 132. [

Thereafter, the second signal gateway 132 receives the No. 7 signal from the first signal gateway 131 via the Internet network 150, routes the No. 7 signal to the second soft switch 142 , And receives the No. 7 signal from the second soft switch 142.

Thereafter, the second signal gateway 132 routes the received No. 7 signal to the second signal relay point 122.

A detailed description of M2PA will be given later with reference to Figs. 4 and 5.

The first and second soft switches 141 and 142 are devices for performing an interworking function between the No. 7 signal network and the Internet network. The first and second soft switches 141 and 142 integrate the interfaces of different networks, such as voice and data, For example.

The first and second soft switches 141 and 142 receive No. 7 signals from the first and second signal gateways 131 and 132 and convert them into packet signals and then route them to the signal gateways 131 and 132 .

3 is a flowchart illustrating a process of optimizing the routing of the No. 7 signal using the Internet according to an exemplary embodiment of the present invention.

Hereinafter, the flow chart shown in Fig. 3 will be described with reference to the components of the system shown in Fig.

The first exchanger 111 generates a No. 7 signal and routes the generated No. 7 signal to the first signal relay point 121 (S301).

After step S301, the first signal relay point 121 routes the No. 7 signal received from the first exchange 111 to the first signal gateway 131 (S302).

After step S302, the first signal gateway 131 routes the No. 7 signal received from the first signal relay point 121 to the first soft switch 141 (S303).

After step S303, the first soft switch 141 converts the No. 7 signal received from the first signal gateway 131 into a usable packet signal in the Internet 150, and transmits the No. 7 signal To the first signal gateway 131 (S304).

After step S304, the first signal gateway 131 routes the No. 7 signal converted into the packet signal to the second signal gateway 132 via the Internet network 150 (S305).

At this time, the first signaling gateway 131 can transmit the No. 7 signal through the Internet network 150 using the M2PA protocol.

A detailed description of M2PA will be given later with reference to Figs. 4 and 5.

After step S305, the second signal gateway 132 receives the No. 7 signal converted into the packet signal from the first signal gateway 131, and routes the signal to the second soft switch 142 (S306).

After step S306, the second soft switch 142 again converts the No. 7 signal converted into the packet signal into a signal usable in the No. 7 signaling network and routes it to the second signal gateway 132 S307).

After step S307, the second signal gateway 132 routes the No. 7 signal received from the second soft switch 142 to the second signal relay point 112 (S308).

After step S308, the second signal relay point 122 routes the No. 7 signal received from the second signal gateway 132 to the second exchange 112 (S309).

3 and the conventional contents shown in FIG. 1, instead of the No. 7 signal routing method using the existing E1 transmission path, the first and second signal gateways (not shown) connected to the Internet network 150 The physical signal transmission period corresponding to the E1 transmission path from the step S105 to the step S107 can be reduced by routing the No.7 signal through the Internet network 150 using the M2PA protocol of the mobile communication terminal 131,

4 is a diagram showing a hierarchical structure of No. 7 protocol for explaining the M2PA protocol.

5, the levels 1 to 3 are called MTP (Message Transfer Part), the level 4 is a signaling connection control part (SCCP) , An ISDN User Part (ISUP), and a Transaction Capabilities Application Part (TCAP).

Hereinafter, each level will be described. The MTP is a layer responsible for stable transmission of a signaling message. The MTP can be classified into three levels such as a physical level, a link level, and a network level. In general, 1, level 2, and level 3, respectively.

MTP level 1 defines the physical characteristics, electrical characteristics, and mechanical characteristics of a signal link, and specifies the transmission speed and transmission method of the signal link.

MTP level 2 is the part that stipulates the ability to transmit signaling messages stably over an individual signal link and to maintain good signal link state. Specifically, it specifies the division of individual signal messages, error detection, and flow control.

The MTP level 3 may comprise a signaling message processing function and a signaling network management function. The signaling message processing function specifies the function of routing to the appropriate signal route according to the Originating Point Code (OPC) and Destination Point Code (DPC) of the signaling message, or decomposing the signaling message to the user part of the MTP. When transmitting a signaling message, it changes the routing path from the originally specified signaling route to the new signaling route according to the state of the signaling network, and defines a function to allow the signaling message to be transmitted well.

On the other hand, SCCP is a supplement to the signaling message processing function of the MTP, and defines a routing and application state management function for transmitting a signal message between a plurality of applications existing in each signal point.

TCAP, on the other hand, provides a means to send and receive meaningful information between two applications in a signaling network. It defines noncircuit-related information transfer function.

Meanwhile, ISUP defines the signal processing function to be performed between nodes, which is required to support ISDN, which is a signaling method between a subscriber and a node, and specifies circuit-related information transmission.

5 is a diagram showing the structure of the M2PA protocol.

Since the M2PA (MTP2 Peer-to-Peer Adaptation Layer) protocol includes up to the MTP 2 level layer of the No. 7 signal network, the MTP 3 level layer portion is preserved as it is using the M2PA protocol, .

In addition, since the MTP 3 level layer is directly transmitted, the above functions of the MTP 3 level, that is, the functions of the route management, traffic management and link management, and related messages can be used as they are.

Also, from the viewpoint of MTP 3 level, there is no recognition of the lower layer on the protocol, so even if the M2PA protocol is used, it is not affected by the reliable transmission function of MTP 3 level loss guarantee.

5, it can be seen that MTP 1 level and MTP 2 level among the MTP 1, MTP 2 and MTP 3 level protocols used in the existing No. 7 signal network are converted into IP related protocols.

M2PA can be used up to 16 Stream Control Transmission Protocol (SCTP) multiple connections between peers, which is equal to the maximum number of links that can be included in the MTP 3 level link set.

At this time, since the transmission speed of one IP link is at least 10 Mbps and is generally 100 Mbps, it is possible to transmit a large number of bandwidths in comparison with the existing No. 7 network using MTP 2 level which is 56 Kbps for T1 transmission path and 64 Kbps for E1 transmission path Can be provided.

More specifically, using a Quality of Service (QoS) function such as an IP high flag enables transmission / reception using a priority value for transmitting an ISUP message prior to the TCAP. As a result of traffic congestion, Even if a loss occurs, the traffic can be processed according to the priority.

In addition, since the Fill In Signal Unit (FISU) at the MTP 2 level is no longer used, the bandwidth of Time Division Multiplexing (TDM) No. 7 traffic can be saved.

In addition, the M2PA protocol can be used in a peer-to-peer architecture between signaling gateways to serve as an alternative to a signal relay point (STP), which is a more cost-effective solution than a high cost signal relay point (STP) Can be presented.

1 to 5, the conventional No. 7 signal link is constructed by arranging one link set as a 64K 4 link per E1 transmission line line in consideration of the risk of a network condition Which is not very good in cost efficiency compared to the Internet network.

In addition, server expansion due to the lack of E1 cards compared to the server performance of the signal network application also causes a huge investment cost.

Since the signal network is almost full-mesh, it is very difficult for operators to pay for E1 line leasing and server expansion.

Accordingly, the present invention uses a TTP-based MTP level 2 protocol, M2PA, to construct a signal link based on the Internet network.

The M2PA link uses the MTP level 3 as an upper protocol, the same as the MTP level 2 signal link, and can configure the MTP3 signal link using the Internet network as the transmission path.

Also, M2PA does not have end-to-end directionality due to the same protocol structure between peers, and connection can be established according to the signal link activation procedure based on MTP2.

Therefore, instead of the No. 7 signal routing method using the existing E1 transmission path, the No.1 signal routing method using the M2PA protocol of the first and second signal gateways 131 and 132 connected to the Internet network 150, .7 signal routing, thereby reducing the signal transmission interval for call processing in the city, the suburbs, and the international call, thereby improving the call quality by shortening the call connection time.

In addition, since the transmission path E1 for signal transmission is not required, and the hardware (board) connected from the signal gateway to the transmission path E1 is not required, the cost can be reduced by simplifying the network.

Even if the signal traffic increases, it is not necessary to add a separate E1 transmission line by using the Internet network 150, and since the signal traffic is transmitted to the Internet network 150, it is possible to secure the stability and reliability of the signal .

FIG. 6 is a diagram illustrating a conventional signal network routing scheme applied to the field.

6, the bobbin signal gateway 611 and the charging signal gateway 612 route the signal traffic to the adjacent exchanger 621 and the barrel exchanger 622. The charging switch 621 and the charging exchanger 621 It can be seen that the ball hook changer 622 is connected to the chongju signal gateway 631 and the chungju signal gateway 632 through the physical transmission path E1 to route the signal traffic.

FIG. 7 is a diagram illustrating a method for optimizing No. 7 routing using an Internet network according to an embodiment of the present invention, applied to a site shown in FIG.

7, the ball-and-socket signaling gateway 611 and the charging signaling gateway 612 use the Internet network to transmit signal traffic to signal gateways other than the adjacent exchanges, that is, And can be directly routed directly to the Chungju signal gateway 632.

After releasing the physical configuration connected to the transmission path E1 between the charge exchange 621 and the pendant exchange 622 and between the soulgate signal gateway 631 and the chungju signal gateway 632, It can be seen that signal traffic processing is possible.

Since the physical transmission path to the soulgage signal gateway 631 and the chungju signal gateway 632 is released, the ball exchange signal gateway 611 and the charging signal gateway 612 Signal traffic, respectively.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be.

It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

111, 112: first and second exchanges
121, 122: First and second signal relay points
131, 132: first and second signal gateways
141, 142: First and second soft switches
150: Internet network

Claims (9)

In a system for routing a No. 7 signal using an Internet network,
A signal relay point for receiving and routing No. 7 signal from the exchange,
A soft switch for receiving the No. 7 signal and converting it into a packet signal usable in the Internet network and routing the No. 7 signal converted into the packet signal,
Receiving a No. 7 signal from the signal relay point and routing it to the soft switch, receiving a No. 7 signal converted into the packet signal from the soft switch, A signaling gateway that routes to a signaling gateway.
Wherein the signaling gateway accesses the Internet network using an MTP2 Peer-to-Peer Adaptation Layer (M2PA) protocol.
In a system for routing a No. 7 signal using an Internet network,
A signal gateway for receiving a No. 7 signal converted into a packet signal from a peer signal gateway that is not adjacent to itself through the Internet network and routing the No. 7 signal,
A soft switch for receiving the No. 7 signal and converting it into a usable signal form in a No. 7 signaling network and routing the converted No. 7 signal,
A signal relay point for receiving the converted No. 7 signal and routing it to the exchange
Wherein the signaling gateway accesses the Internet network using an MTP2 Peer-to-Peer Adaptation Layer (M2PA) protocol.
3. The method according to claim 1 or 2,
Wherein the M2PA protocol implements a Time Division Multiplexing (TDM) based Message Transfer Part level 2 (MTP2) protocol based on the Internet network.
The method of claim 3,
Wherein the link according to the M2PA protocol uses a signaling link of MTP 3 (Message Transfer Part level 3) as an upper protocol in the same manner as the MTP 2 signaling link.
5. The method of claim 4,
Wherein the M2PA protocol constitutes a signaling link of the MTP 3 using the Internet network as a transmission path.
6. The method of claim 5,
Wherein the M2PA protocol has no end-point directionality in the protocol structure of the signaling gateway and the peer signaling gateway.
The method according to claim 6,
Wherein the M2PA protocol is established in accordance with the signal link activation procedure of the MTP2.
In a method for routing a No. 7 signal using an Internet network,
(a) at the first exchanger, generating a No. 7 signal and routing it to a first signal relay point,
(b) routing the No. 7 signal to the first signal gateway at the first signal relay point,
(c) routing the No. 7 signal to the first softswitch at the first signaling gateway,
(d) converting the No. 7 signal from the first soft switch to a packet signal usable in the Internet network and routing the No. 7 signal converted into the packet signal to the first signal gateway; and
(e) routing, at the first signaling gateway, the No. 7 signal converted into the packet signal to a second signaling gateway, which is a peer signaling gateway not adjacent to itself, via the Internet network,
Wherein the first signaling gateway accesses the Internet network using an MTP2 Peer-to-Peer Adaptation Layer (M2PA) protocol.
9. The method of claim 8,
(f) at the second signaling gateway, routing the No. 7 signal converted into the packet signal to a second softswitch,
(g) converting, in the second soft switch, the No. 7 signal converted into the packet signal into a signal usable in the No. 7 signaling network and routing the signal to the second signal gateway 132
(h) routing, at the second signaling gateway, the No. 7 signal converted to the form of a usable signal in the No. 7 signaling network to a second signal relaying point, and
(i) routing, at the second signal relay point, the No. 7 signal converted to the form of a signal usable in the No. 7 signaling network to a second exchange
/ RTI > The method of claim 7, further comprising:

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