KR101113444B1 - Routing system for interlocking between differnt communication operators and gateway hlr therefor - Google Patents

Abstract

The present invention relates to a routing system for interworking networks between heterogeneous communication providers and a gateway home location register for the same. An originating exchange in a first network that receives a location response and processes the originating call; As a gateway between the originating exchange and the home location register of the second network, a call processing method is determined based on the called location response received from the home location registration of the second network, and the information according to the determined call processing method is determined. A gateway home location register of a second network to transmit a called location response to the originating exchange; And a home location register of a second network which determines whether or not optimal routing is performed for the incoming call processing of the outgoing call, and transmits a called location response according to the optimal routing determination result to the gateway home location register. Based on the information according to the call processing method included in the called location response received from the gateway home location register, the originating call is processed through the gateway switch of the first network, or originated to the last destination exchange of the second network. The call is directly received. Optimize the interval for call processing when the network is open between service providers.

Heterogeneous service providers, gateway HLR, gateway exchange, network interworking, network opening

Description

Routing system for interworking network between heterogeneous service providers and gateway home location register {ROUTING SYSTEM FOR INTERLOCKING BETWEEN DIFFERNT COMMUNICATION OPERATORS AND GATEWAY HLR THEREFOR}

The present invention relates to interworking between heterogeneous communication providers, and more particularly, to a routing system and a routing method for optimizing a call processing interval in interworking between heterogeneous communication providers.

Mobile communication is the first generation of FDMA (Frequency Division Multiple Access) method, and through the second generation of digital mobile communication using Code Division Multiple Access (CDMA) or Time Division Multiple Access (TDMA) method, the first generation of analog mobile communication, while ensuring mobility It has evolved into 3rd generation mobile communication (IMT-2000 (WCDMA), WIBRO, etc.) that overcomes local and voice-oriented limitations of mobile communication and provides non-voice services (voice, data, video, video) regardless of region. Many development activities are currently underway for the 4th generation mobile communication which can provide a complete multimedia mobile communication service.

Meanwhile, in one country, many mobile operators have established independent mobile communication networks and attract subscribers, and provide mobile communication services to their subscribers. At this time, in order to provide a communication service between subscribers of different mobile communication providers, each mobile communication provider opens a part of the network to other mobile communication providers in consultation with other mobile communication providers. However, opening a network to other mobile operators is a limited opening in the form of a gateway switch. That is, when the calling subscriber and the called subscriber are subscribers of different mobile telecommunication operators, the calling telecommunications carrier network must be outgoing only to the gateway exchange of the called telecommunications carrier network to handle the incoming call. Therefore, there is a problem that the section to which the call is connected is not optimized. Specifically, it will be described with reference to FIG. 1.

FIG. 1 is a diagram illustrating interworking between heterogeneous service providers networks. Referring to FIG. 1, a first network 110 and a second network 130 are networks of different communication providers. When the subscriber of the first network 110 sends a call to the subscriber of the second network 130, the mobile switching center (MSC) 110 of the first network 110 is connected to the first network 110. The initial address message (IAM) is transmitted to the gateway switch (GMSC) 113 (S101), and the gateway switch (GMSC) 113 sends the initial address message to the second network 130. It transmits to a gateway exchange (GMSC) 131 (S103).

The gateway exchange 131 of the second network 130 that has received the initial address message sends the incoming location to the Home Location Register (HLR) 133 of the second network 130 to confirm the incoming location of the call. The query message is transmitted (S105). Then, the home location register 133 requests routing information to the exchange 135 in which the called subscriber is located using the location registration information of the subscriber (S107), and receives a routing information response thereto (S109).

Receiving the routing information response, the home location register 133 transmits the called location response including the routing information to the gateway exchange 131 of the second network 130 (S111), and the gateway exchange 131 transmits the gateway location response. The initial address message IAM is transmitted to the destination side exchange 135 based on the routing information included in the destination location response (S113). Accordingly, the called side exchange 135 transmits the call response to the calling side exchange 111 of the first network through the gateway exchanges 131 and 113 after the paging procedure, and finally when the called subscriber answers the call The call between the subscriber and the called party is initiated.

As such, when the subscriber of the first network 110 originates a call to the subscriber of the second network 130, the calling side exchange 111 of the first network 110 is the home position of the second network 130. After receiving the message from the gateway 113 of the first network 110 and the gateway switch 131 of the second network 130 without being able to query the destination location directly with the registrar 133, In the gateway switch 131 of the two networks 130, the called location query is made to the home location register 133 in which the called party information is stored. This is because each mobile service provider does not open each other's network to other service providers as described above. Since each mobile operator does not open each other's network to other carriers, there has been no discussion on the effort to open the network and the system interworking standard.

However, the need to optimize the call connection section and reduce the available resources is expected to intensify along with the global green policy. Accordingly, in opening the network, it is necessary to prepare a prior development for interworking with the system so as to prevent the quality of service to the subscribers from deteriorating and to enable various forms of opening.

The present invention has been proposed to improve the above problems, a routing system for interworking network interworking between different communication providers to establish a call call through an optimized routing path with the network open between different carriers and The purpose is to provide a gateway home location register for this purpose.

Other objects and advantages of the invention will be described below and will be appreciated by the practice of the invention. Further, objects and advantages of the present invention can be realized by the means and the combination shown in the appended claims.

In order to achieve the above object, a routing system for processing incoming calls originating from a first network to a second network according to an aspect of the present invention receives incoming calls from a gateway home location register of a second network as the outgoing call is received. An originating exchange in a first network that receives a location response and processes the originating call; As a gateway between the originating exchange and the home location register of the second network, a call processing method is determined based on the called location response received from the home location registration of the second network, and the information according to the determined call processing method is determined. A gateway home location register of a second network to transmit a called location response to the originating exchange; And a home location register of a second network which determines whether or not optimal routing is performed for the incoming call processing of the outgoing call, and transmits a called location response according to the optimal routing determination result to the gateway home location register. Based on the information according to the call processing method included in the called location response received from the gateway home location register, the originating call is processed through the gateway switch of the first network, or the originating party is transmitted to the final destination exchange of the second network. The call is directly received.

In addition, according to another aspect of the present invention for achieving the above object, the gateway home location register, which is a gateway between the originating side exchange of the first network and the home location register of the second network, receives the originating call. Receiving means for receiving a called location response from a home location register of said second network in response to a request of an originating exchange of a network; Determining means for determining a call processing scheme based on the received called location response; And transmitting means for transmitting a called location response including information according to the call processing method determined by the determining means to the calling side exchange of the first network.

The present invention as described above, it is possible to save the required resources by optimizing the routing interval for call processing in interworking between heterogeneous communication providers. In particular, in the opening of networks between heterogeneous telecommunications providers, the system minimizes system changes by classifying the optimal routing section according to call type or callee's additional service subscription information, and provides customer complaints that may occur when opening the network by providing the same service of its own. Minimize and increase the service quality satisfaction of telecommunication subscribers.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a diagram illustrating a schematic configuration of a routing system in interworking networks between heterogeneous service providers according to an embodiment of the present invention.

Referring to FIG. 2, a first network 210 and a second network 230 exist as networks of heterogeneous communication providers. The communication service providers of the first network 210 and the communication service providers of the second network 230 are different from each other. In FIG. 2, a first network 210 is a network to which a caller subscribes, and a second network 230 is described as a network to which a called party subscribes.

As shown in FIG. 2, the first network 210 includes a Mobile Switching Center (MSC) 211 and a Gateway Switch (GMSC) 213.

The originating exchange 211 of the first network 210 is responsible for mobility management, location registration / management, handover, call origination processing, etc. of the mobile terminal. The originating side exchange 211 of the first network 210 connects directly to the gateway home location register (GHLR: Gateway HLR) 231 of the second network 230 to process incoming calls. Send and receive a message regarding the destination location information. In addition, the originating side exchange 211 of the first network passes through the gateway exchange 213 to the second network 230 based on the called location information received from the gateway home location register 231 of the second network 230. The call setup message may be transmitted or the call setup message may be transmitted directly to the destination exchange of the second network 230 without passing through the gateway switch 213.

Specifically, when the originating exchange 211 of the first network 210 receives an outgoing call for the subscriber of the second network 230 from the subscriber of the first network 210, the gateway of the second network 230 is received. A gateway location query message (SendRoutingInfo or Location Request) is transmitted to the home location register 231, and according to the routing number included in the destination location response message received from the gateway home location register 231, the gateway exchange is sent. The call establishment message is transmitted to the second network 230 through 213 or the call establishment message is directly transmitted to the destination exchange of the second network 230.

In other words, call processing is performed in two ways according to a routing number (RN) included in the called location response message received from the gateway home location register 231. That is, the routing number included in the called location response message is an identification code indicating a call processing method. The first and second call processing methods are classified as follows.

In the first call processing method, the gateway home location register 231 of the second network 230 may acquire information of the final destination exchange, so that information about the gateway home location register together with a specific routing number (RN). 231 is received from the originating exchange 211 of the first network 210, and the originating exchange 211 of the first network is directly connected to the second network without passing through the gateway exchange 213 according to the received information. The call establishment message is transmitted to the destination side exchange 237 of 230. Therefore, the first call processing method is a basic optimal routing (BOR) method.

In the second call processing method, the gateway home location register 231 of the second network 230 cannot acquire the information of the destination exchange, so that it is not the information of the destination exchange. A gateway exchange means a switch that the gateway exchange 211 of the first network 210 connects to the second network 230 for the first time, and may be an exchange that provides a specific additional service, or has a conventional meaning. Information about the gateway exchange) may be received from the gateway home location register 231 to the calling side exchange 211 of the first network 210 together with a specific routing number (RN), and the first network 210 may be used. The originating exchange 211 of the transmits a call setup message through the gateway exchange 213 according to the received information. Accordingly, the gateway exchange of the second network 230 inquires again the home location register 233 of the own network (ie, the second network) and performs call processing. In other words, the second call processing method is a call processing method performed because optimal routing is not allowed.

The information transmitted from the gateway home location register 231 of the second network 230 to the calling exchange 211 of the first network 210 is shown in Table 1 below, and the routing number of Table 1 is The definition of (RN) is shown in Table 2 below.

Call processing method Configuration No. 1 treatment method Routing Number (RN) + TLDN (or MSRN) No. 2 treatment method Routing Number (RN) + MSC_No + MDN (or MSISDN)

RN meaning Call processing method One 3G subscriber incoming No. 2 treatment method 2 When the call ends after sending out the second network-specific announcement No. 2 treatment method 3 In case of additional service type A No. 2 treatment method 4 In case of supplementary service type B No. 2 treatment method 5 2G subscriber incoming No. 1 treatment method

According to the first call processing method shown in [Table 1], routing to the called location response transmitted from the gateway home location register 231 of the second network 230 to the originating exchange 211 of the first network 210, A number (RN) and optimal routing information (Temporary Local Directory Number (TLDN) or Mobile Station Roaming Number (MSRN)) are included. The optimal routing information includes information of the destination exchange. The originating exchange 211 of the first network 210 may directly pass the second network 230 without passing through the gateway exchange 213 based on the optimal routing information. Call establishment message to the destination exchange (237).

According to the second call processing method in Table 1, routing to the called location response transmitted from the gateway home location register 231 of the second network 230 to the originating exchange 211 of the first network 210 is routed. Number (RN), exchange number (MSC_No) and called telephone number (Mobile Directory Number) or Mobile Subscriber Identifier Number (MSISDN). The exchange number (MSC_No) is a number of other exchanges other than the destination exchange, and the second exchange source 211 of the first network 210 should transmit a call establishment message through the gateway exchange 213. The number of exchanges in network 230. The originating exchange 211 of the first network 210 sends a call setup message to the gateway exchange 213 of the first network 210, and the gateway exchange 213 of the first network 210 is the exchange number. The call establishment message is transmitted to the gateway exchange 235 of the second network 230 corresponding to (MSC_No).

On the other hand, the originating exchange 211 of the first network 210 performs the call processing scheme according to the routing number RN included in the called location response received from the gateway home location register 231 of the second network 230. And extracts optimal routing information (TLDN, MSRN) or exchange number (MSC_No) / called telephone number (MDN, MSRN) from the called location response according to the determined call processing method and transmits a call setup message. As described in [Table 2], the routing number RN not only distinguishes the call processing method (that is, distinguishes whether it is the first call processing method or the second call processing method), and the call is sent to the second network 230. It is used to calculate statistical information about the system. The routing number RN is not limited to that described in [Table 2] but may be changed by consultation between the first network 210 operator and the second network 230 operator.

The originating exchange 211 of the first network 210 has an optimal routing according to the routing number RN included in the called location response message received from the gateway home location register 231 of the second network 230. The number of times performed, the reason why the optimal routing was not performed when the optimal routing was not performed, and the number of occurrences of each reason when the optimal routing was not performed are analyzed. The information analyzed in this way is utilized for network interworking development. Also, by analyzing routing numbers, transparency of settlement between different operators and effective response in case of customer complaints are possible.

The gateway exchanger 213 of the first network 210 serves as a gateway of the first network 210 to the second network 230, and according to the second call processing method, the first network 210. Receiving a call setup message from the originating exchange 211 of the call and transmitting the call setup message to the gateway exchange 235 of the second network 230 according to the exchange number MSC_No included in the call setup message; The call response message for the call establishment message is received from the gateway exchange 235 of the second network 230 and transmitted to the calling side exchange 211 of the first network 210. In FIG. 1, the gateway exchanger 235 of the second network 230 is not a fixed one gateway exchanger, and as described above, the first network from the gateway home location register 231 according to the second call processing method. A gateway other than the last destination exchange corresponding to the exchange number (MSC_No) included in the called location response transmitted to the originating exchange 211 of the first exchange 210, to which the gateway exchange 213 of the first network 210 first connects. It should be understood as an exchange of the second network 230.

Referring back to FIG. 2, the second network 230 includes a gateway home location register (GHLR) 231, a home location register (HLR) 233, a gateway exchange (GMSC) 235, and a destination exchanger (MSC). (237).

The gateway home location register 231 is a home location in which the location information of the called party of the calling side exchange 211 and the second network 230 is registered in association with the calling side exchange 211 of the first network 210. It serves as an intermediary between registrars 233. When the gateway home location register 231 receives the incoming location query message from the originating exchange 211 of the first network 210, the gateway home location register 231 receives the incoming location query message and receives the received location query message from the home location register 233. The routing number RN is assigned to the called location response, and the called location response is transmitted to the calling side exchange 211 of the first network 210. Examples of routing numbers to be allocated are shown in Table 2 above.

The home location register 233 manages the profile of the mobile communication subscriber, including the location information of the mobile terminal, and provides the location information of the mobile communication subscriber at the request of the exchange. When the incoming location query message is received from the gateway home location register 231, the home location register 233 performs a procedure of acquiring routing information in association with the destination exchange 237, and performs a routing response according to the result. The gateway is sent to the home location register 231.

At this time, when the home location register 233 receives the incoming location query message from the gateway home location register 231, the home location register 233 confirms that the call is being made from the first network 210, and accordingly, the optimal routing (BOR: Basic Optimal Routing), and according to the result, the routing information is obtained from the destination exchange 237 and transmitted to the gateway home location register 231 or the routing information of the destination exchange 237 is provided. The reason why it cannot be transmitted is transmitted to the gateway home location register 231.

The gateway home location register 231 assigns a routing number RN based on the information received from the home location register 233 (reason for not providing routing information or routing information), and assigns the routing number RN. And the routing information (TLDN, MSRN) received from the home location register 233 in the called location response and transmitted to the calling side exchange 211 of the first network 210, or the assigned routing number (RN). And destination exchange numbers (MSC_No) and recipient telephone numbers (MDN, MSISDN) other than the destination exchange, are sent to the destination exchange 211 of the first network 210 in the destination location response.

Thus, although not shown in FIG. 2, the gateway home location register 231 receives the incoming location query message from the originating exchange 211 of the first network 210 as the home location register of the second network 230. Receiving means for receiving a called location response from (233), a call processing method determining means for determining a call processing method based on information (reason for not providing routing information or routing information) included in the received called location response; And a called location response of the first network 210 with a called location response including information according to the determined call processing scheme (ie, destination exchange number other than routing number, last called party exchange information, or last called party exchange information, etc.). It comprises a transmission means for transmitting to the exchange 211.

Meanwhile, as described above, the gateway exchanger 235 of the second network 230 is not a fixed gateway exchanger, and the gateway network location changer 231 of the first network may be configured according to the second processing method. A switch other than the final destination exchange corresponding to the exchange number MSC_No included in the called location response transmitted to the source exchange 211, the gateway to which the gateway exchange 213 of the first network 210 first connects. It is an exchange of two networks 230.

The gateway exchange 235 of the second network 230 receives a call setup message from the gateway exchange 213 of the first network 210 according to the second call processing scheme, and is processed like a normal originating exchange. Acquiring the called location information through the home location register 233 of the own network and performing a call setup process based on the obtained called location information, or for the subscriber of the first network 210 of the second network 230. Call processing, such as performing specialized additional services.

Hereinafter, a call routing method in the system of FIG. 1 will be described in detail with reference to FIGS. 3 to 5.

3 is a signal flow diagram of an embodiment illustrating a call routing process in the routing system of FIG. This is an example of determining the optimum routing in the home location register 233 of the second network 230 for the originating call of the originator of the first network 210.

Referring to FIG. 3, when a subscriber of the first network 210 sends a call to a subscriber of the second network 230, an outgoing call originated from the subscriber station of the first network 210 is transmitted to the first network 210. Is transmitted to the calling side exchange 211, and the calling side exchange 211 confirms that the called party is a subscriber of the second network 230 based on the called party's telephone number included in the outgoing call. Accordingly, the calling side exchange 211 transmits the incoming location query message (SendRoutingInfo or Location Request) to the gateway home location register 231 of the second network 230 (S301).

The gateway home location register 231 of the second network 230 receiving the called location query message transmits the called location query message to the home location register 233 in which the called party's information is registered (S303).

The home location register 233, which has received the incoming location query message from the gateway home location register 231, confirms that the call is being made from the subscriber of the first network 210, and performs basic routing (BOB). Judge. That is, the home location register 233 checks the additional service subscription information of the called party, the type of the originating call (determining whether it is a 3G or 2G call), the status of the called party, etc. and determines whether optimal routing (BOR) is necessary (S305).

If it is determined that optimal routing is necessary, the home location register 233 requests routing information from the destination side exchange 237 (S307). The home location register 233 receives the routing information response from the destination side exchange 237 (S309). Here, the routing information response includes a TLDN.

As described with reference to FIG. 1, when the originating call is a 2G call, a second call processing scheme, that is, optimal routing (BOR) is required, and therefore the home location register 233 receives routing information from the called side exchange 237. Obtained and provided to the gateway home location register (231). On the other hand, if the called party is subscribed to the additional service A or B, or if the called terminal is powered off and needs to send the specialized announcement of the second network 230, it is necessary to provide the supplementary service or to send the specialized announcement. Optimal routing is unnecessary for this purpose, and outgoing calls in the first network 210 must be sent to the exchange in the designated second network 230. This will be described later.

In the present embodiment, if it is determined that optimal routing is necessary, the home location register 233 obtains routing information from the destination side exchange 237 as described above, and transmits the routing information to the gateway home location register 233, and the gateway home location register 233. ) Is a destination location that includes a routing number (RN, eg, '5' in Table 2) that identifies an optimal routing (ie, identifies a first call processing scheme) and the obtained routing information (TLDN or MSRN). The response (RN + TLDN (or MSRN)) is transmitted to the originating exchange 211 of the first network 210 (S313).

The originating exchange 211 of the first network 210 that has received the called location response determines that it is an optimal routing (BOR) process based on the routing number (RN) included in the called location response (ie, the first). And the final destination side exchange 237 of the second network 230 directly without passing through the gateway exchanges 213 and 235 according to the optimal routing information (TLDN or MSRN) included in the destination location response. A call setup message (IAM: Initial Address Message) is transmitted (S315). The destination exchange 237 of the second network 230, upon receiving the call establishment message, performs a normal paging procedure, a call answering procedure, a call connection procedure, and the like to enable a call.

As described above, in the present embodiment, the source exchanger 211 of the first network 210 performs the incoming location query process directly to the gateway home location register 231 of the second network 231 when an outgoing call is received, Based on the optimal routing determination result and the routing information received from the gateway home location register 231, the call is directly connected to the destination party exchange 237 without passing through the gateway switches 213 and 235. Therefore, in the call connection between the subscriber of the first network 210 and the subscriber of the second network 230, the call processing process is simplified and optimized.

4 is a signal flow diagram of another embodiment illustrating a call routing process in the routing system of FIG. As in the case where the called party of the second network 230 is a 3G subscriber, the home location register 233 of the second network 230 does not determine the optimal routing. When the first network 210 allows the best routing (BOR) only for the incoming call to the 2G subscriber in the state that it is not possible to distinguish between the 2G subscriber or 3G subscriber only by the called number, this is the home location of the second network 230. The determination is made by the register 233.

Referring to FIG. 4, when a subscriber of the first network 210 sends a call to a subscriber of the second network 230, the outgoing call originated from the subscriber station of the first network 210 is transmitted to the first network 210. Is transmitted to the calling side exchange 211, and the calling side exchange 211 confirms that the called party is a subscriber of the second network 230 based on the called party's telephone number included in the outgoing call. Accordingly, the originating exchange 211 transmits the incoming location query message (SendRoutingInfo or Location Request) to the gateway home location register 231 of the second network 230 (S401).

The gateway home location register 231 of the second network 230 receiving the called location query message transmits the called location query message to the home location register 233 in which the called party's information is registered (S403).

The home location register 233, which has received the incoming location query message from the gateway home location register 231, confirms that a call is being made from the subscriber of the first network 210, and performs basic routing (BOR: Basic Optimal Routing). Judge. That is, the home location register 233 checks the additional service subscription information of the called party, the type of the calling / called party (determining whether it is a 3G subscriber or a 2G subscriber), the status of the called party, etc., and determines whether optimal routing (BOR) is necessary ( S405).

If it is determined that the optimal routing is not necessary, in this example, when the called party is a 3G subscriber, the home location register 233 receives the call including the reason (Reason) and the called party number (MDN, MSISDN) that cannot provide the optimal routing information. The location response is transmitted to the gateway home location register 233 (S407).

The gateway home location register 233 assigns a routing number (RN, for example, '1' in Table 2) and an exchange number (MSC_No) according to the reason why the routing information cannot be provided. A called location response (RN + MSC_No + MDN (or MSISDN)) including the called party's telephone number is transmitted to the calling side exchange 211 of the first network 210 (S409).

The originating exchange 211 of the first network 210 that has received the called location response determines that it is not an optimal routing (BOR) process based on the routing number (RN) included in the called location response (i.e., Confirming that it is the second call processing method and transmitting a call setup message (IAM) including the exchange number (MSC_No) and the called party number included in the called location response to the gateway exchange 213 of the first network 210. (S411).

The gateway exchange 213 of the first network 210 transmits a call setup message IAM to the gateway exchange 235 of the second network 230 corresponding to the exchange number MSC_No included in the call setup message. (S413). The gateway exchange 235 of the second network 230 corresponding to the exchange number MSC_No performs the same operation as the originating exchange. That is, the gateway switch 235 of the second network 230 transmits the incoming location query message (SRI, LR) to the home location register 233 for the incoming call processing, and receives the incoming location response accordingly. The incoming call processing procedure of the outgoing call is performed (S415 to S423). When the called party answers the call, the gateway exchange 235 of the second network 230 transmits a response message to the caller through the gateway exchange 213 of the first network 210 and thus initiates a call. In other words, although the exchange 211 of the first network 210 is the source exchange, the gateway exchange 231 of the second network 230 performs the role of the source exchange in the second network 230 instead. Incoming call is processed.

In the present embodiment with reference to FIG. 4, the receiver is a 3G subscriber as an example of not determining the optimal routing. However, in addition to the type of the originating / receiving subscriber, the second network 230 as described in [Table 2] is described. May not determine the optimal routing to handle the specialized supplementary services. That is, the home location register 233 of the second network 230 performs optimal routing to induce the outgoing call to the designated exchange instead of the destination exchange to handle the specialized additional service of the second network 230 only. Therefore, the routing information is transmitted to the gateway home location register 231 accordingly without determining. The gateway home location register 231 of the second network 230 may provide the exchange number MSC_No for providing the specialized supplementary service based on the reason for not providing routing information to the originating exchange 210 of the first network 210. To send.

When opening a network to allow unconditional optimized routing between different carriers, required resources can be minimized, but service quality may be deteriorated, for example, because service provider-specific services are not provided. In order to solve this problem, all network elements can be opened by consultation only for the parts which are selectively needed without opening. If the access to the exchange providing the specific additional service is not opened to other carriers, as described above, the home location register 233 of the second network 230 determines that the optimal routing (BOR) is not performed. In addition, the gateway home location register 233 of the second network 230 allocates a routing number and an exchange number to be accessed only through the gateway exchange, and transmits the routing number and the exchange number to the calling side exchange 211 of the first network 210.

5 is a signal flow diagram of another embodiment illustrating a call routing process in the routing system of FIG. 5 is an example of a case where the call is terminated after the announcement announcement specialized to the originator of the first network 210 in the second network (230).

Referring to FIG. 5, when a subscriber of the first network 210 sends a call to a subscriber of the second network 230, the outgoing call transmitted from the subscriber station of the first network 210 is transmitted to the first network 210. Is transmitted to the calling side exchange 211, and the calling side exchange 211 confirms that the called party is a subscriber of the second network 230 based on the called party's telephone number included in the outgoing call. Accordingly, the originating exchange 211 transmits the incoming location query message (SendRoutingInfo or Location Request) to the gateway home location register 231 of the second network 230 (S501).

The gateway home location register 231 of the second network 230 receiving the called location query message transmits the called location query message to the home location register 233 in which the called party's information is registered (S503).

The home location register 233, which has received the incoming location query message from the gateway home location register 231, confirms that a call is being made from the subscriber of the first network 210, and performs basic routing (BOR: Basic Optimal Routing). Judge. That is, the home location register 233 checks the additional service subscription information of the called party, the type of the calling / receiving subscriber (determining whether it is a 3G subscriber or a 2G subscriber), the status of the called party, and determines whether optimal routing (BOR) is necessary. As an example of the case where the called party's terminal power is turned off in this embodiment, the home location register 233 determines that an incomplete call cannot be established (S505).

Since it was determined that the call was not completed and optimal routing was not necessary, the home location register 233 could not receive the called location response including the reason (ADR: AccessDeniedReason) and the called party number (MDN or MSISDN). Transfer to the gateway home location register (233) (S507).

The gateway home location register 233 assigns a routing number (RN, for example, '2' in Table 2) and an exchange number (MSC_No) according to the reason why the routing information cannot be provided, and the routing number and the exchange number and the routing number. A called location response (RN + MSC_No + MDN (or MSISDN)) including the called party's telephone number is transmitted to the calling side exchange 211 of the first network 210 (S509).

The originating exchange 211 of the first network 210 that has received the called location response confirms that it is not an optimal routing (BOR) process but an incomplete call process based on the routing number (RN) included in the called location response. (I.e., confirming that it is a second call processing method), and a call setup message (IAM) including an exchange number (MSC_No) and a called telephone number included in the called location response is sent to the gateway of the first network 210 ( 213) (S511).

The gateway exchange 213 of the first network 210 transmits a call setup message IAM to the gateway exchange 235 of the second network 230 corresponding to the exchange number MSC_No included in the call setup message. (S513). The gateway exchange 235 of the second network 230 corresponding to the exchange number MSC_No is a switch that performs call termination processing after sending a specific announcement, and is not available as a response to the call setup message. The message is sent to the caller of the first network 210 through the gateway exchange 213 of the first network 210, and the call is terminated (S515).

Although the gateway exchange 235 of the second network 230 has been described as an exchange in which a call termination process is performed after the announcement is sent in this embodiment, the gateway exchange 235 serves only as a normal gateway and is guided by another exchange. After the message is sent, the call termination process may be performed. At this time, the switch number MSC_No assigned from the gateway home location register 231 of the second network 230 corresponds to the number of the gateway switch of the conventional second network 230 and the gateway switch of the second network 230. 235 serves as an originating exchange in the second network 230. That is, the gateway switch 235 of the second network 230 is called by the home location register 233 based on the called party's telephone number included in the call setup message received from the gateway switch 211 of the first network 210. After transmitting the location query message and receiving the incoming location response according to the incomplete call processing from the home location register 233, the received message is connected to the announcement announcement exchange switch according to the received location location response to receive the announcement and the first network ( Send to the sender of 210).

When opening a network to allow unconditional optimized routing between different carriers, required resources can be minimized, but service quality may be deteriorated, for example, because service provider-specific services are not provided. In order to solve this problem, all network elements can be opened by consultation only for the parts which are selectively needed without opening. As in the present embodiment, when the access to the exchange performing the announcement and the call termination according to the incomplete call determination is not opened to another communication service provider, as described with reference to FIG. 5, the second network 230 The home location register 233 determines that the optimal routing (BOR) processing is not performed, and the gateway home location register 233 of the second network 230 assigns a routing number and an exchange number to be accessed only through the gateway exchange. To the originating exchange 211 of the first network 210.

The present invention described above is not to be applied only between different carriers, it should be understood that the same applies to networks of different standards within the same provider. For example, the routing method according to the present invention as described above may be applied in a network in which CDMA, Wibro-IMS, and the like are mixed in one provider.

The method of the present invention as described above may be embodied as a program and stored in a computer-readable recording medium (such as a CD-ROM, a RAM, a ROM, a floppy disk, a hard disk, or a magneto-optical disk).

While the specification contains many features, such features should not be construed as limiting the scope of the invention or the scope of the claims. Also, the features described in the individual embodiments herein can be implemented in combination in a single embodiment. Conversely, various features described herein in a single embodiment may be implemented in various embodiments individually or in a suitable subcombination.

It is to be understood that, although the operations have been described in a particular order in the figures, it should be understood that such operations are performed in a particular order as shown, or that a series of sequential orders, or all described operations, . In some circumstances, multitasking and parallel processing may be advantageous. In addition, it should be understood that the division of various system components in the above-described embodiments does not require such division in all embodiments. The above-described program components and systems can generally be implemented as a single software product or as a package in multiple software products.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

The following drawings, which are attached to this specification, illustrate preferred embodiments of the present invention, and together with the detailed description of the present invention serve to further understand the technical spirit of the present invention, the present invention includes matters described in such drawings. It should not be construed as limited to.

1 is a diagram illustrating network interworking between conventional heterogeneous operators.

2 is a diagram illustrating a schematic configuration of a routing system in interworking networks between heterogeneous service providers according to an embodiment of the present invention.

3 is a signal flow diagram of an embodiment illustrating a call routing process in the routing system of FIG.

4 is a signal flow diagram of another embodiment illustrating a call routing process in the routing system of FIG.

5 is a signal flow diagram of another embodiment illustrating a call routing process in the routing system of FIG.

Claims (9)

delete delete A routing system for processing incoming calls originating from a first network to a second network. An originating side exchange of a first network that receives an incoming location response from a gateway home location register of a second network in response to receiving the outgoing call; As a gateway between the originating exchange and the home location register of the second network, a call processing method is determined based on the called location response received from the home location register of the second network, and information according to the determined call processing method is determined. A gateway home location register of a second network to transmit a called location response to the originating exchange; And And a home location register of a second network that determines whether or not optimal routing is performed for the incoming call processing of the outgoing call and transmits a called location response to the gateway home location register according to the optimum routing determination result. The originating exchange exchanges the originating call through the gateway exchange of the first network based on the information according to the call processing method included in the called location response received from the gateway home location register, or the end of the second network. Process incoming call directly to the destination exchange, The call processing method includes any one of a first call processing method for directly receiving an outgoing call to a final destination exchange in a second network, and a second call processing method for incoming call processing through a gateway switch of a first network. One, The information according to the first call processing method is an identification code indicating the first call processing method and the information of the destination party exchange, The information according to the second processing method is an identification code indicating the second processing method and an exchange number other than the destination exchange. The gateway home location register, For each additional service subscription identification information, an identification code indicating a second processing method is distinguished, and an identification code corresponding to a reason for not providing optimal routing information included in a called location response received from a home location register of the second network is provided. Routing system, characterized in that assigned to the identification code indicating the call processing method. A routing system for processing incoming calls originating from a first network to a second network. An originating side exchange of a first network that receives an incoming location response from a gateway home location register of a second network in response to receiving the outgoing call; As a gateway between the originating exchange and the home location register of the second network, a call processing method is determined based on the called location response received from the home location register of the second network, and information according to the determined call processing method is determined. A gateway home location register of a second network to transmit a called location response to the originating exchange; And And a home location register of a second network that determines whether or not optimal routing is performed for the incoming call processing of the outgoing call and transmits a called location response to the gateway home location register according to the optimum routing determination result. The originating exchange exchanges the originating call through the gateway exchange of the first network based on the information according to the call processing method included in the called location response received from the gateway home location register, or the end of the second network. Process incoming call directly to the destination exchange, The call processing method includes any one of a first call processing method for directly receiving an outgoing call to a final destination exchange in a second network, and a second call processing method for incoming call processing through a gateway switch of a first network. One, The information according to the first call processing method is an identification code indicating the first call processing method and the information of the destination party exchange, The information according to the second processing method is an identification code indicating the second processing method and an exchange number other than the destination exchange. The home position register of the second network, When the called party is not available, the called location response including the reason why the optimal routing information cannot be provided is transmitted to the gateway home location register. The gateway home location register, And assigning an identification code corresponding to the reason for not providing the optimal routing information as an identification code indicating a second call processing method. The method according to claim 3 or 4, The originating exchange, And a ratio of a reason for allowing or disallowing optimal routing in the second network based on the identification code indicating the second call processing method. In the gateway home location register which is a gateway between the originating exchange in the first network and the home location register in the second network, Receiving means for receiving a called location response from a home location register of said second network in response to a request of an originating exchange of said first network receiving an outgoing call; Determining means for determining a call processing scheme based on the received called location response; And And a transmitting means for transmitting a called location response including information according to the call processing method determined by the determining means to the calling side exchange of the first network. The method of claim 6, The determining means, Determining any one of the first call processing method for directly receiving the outgoing call to the final destination side exchange of the second network, and the second call processing method for incoming call processing through the gateway exchange of the first network, In determining the first call processing method, a called location response including an identification code indicating the first call processing method and final destination exchange information is transmitted to the originating exchange of the first network. And when the second call processing method is determined, a called location response including an identification code indicating the second call processing method and an identification number of another exchange other than the destination exchange is transmitted to the originating exchange of the first network. Gateway home location register. The method of claim 7, wherein The receiving means, Receiving a called location response including a reason for not providing optimal routing information according to a subscriber's subscription to a particular supplementary service, The determining means, A gateway comprising: determining a second call processing method based on the reason for not providing the optimal routing information, and assigning an identification code corresponding to the reason for not providing the optimum routing information as an identification code indicating the second call processing method. Home Location Register. The method of claim 7, wherein The receiving means, Receiving a called location response including a reason why the optimal routing information cannot be provided according to the called party's inaccessible state, The determining means, A gateway comprising: determining a second call processing method based on the reason for not providing the optimal routing information, and assigning an identification code corresponding to the reason for not providing the optimum routing information as an identification code indicating the second call processing method. Home Location Register.

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