KR102193556B1 - Relay system for call processing and diameter signal mediation method thereof - Google Patents

Abstract

The present invention is a call processing relay system and a diagram thereof in a 5G communication environment configured to detect an error in a message transmitted from a source device to a destination device, and automatically adjust the message to an acceptable message in the destination device. Regarding a method of adjusting a meter signal, more specifically, transmission/reception in which a request message is received from a source device and transmitted to a destination device, and a response message to the request message is received from the destination device and transmitted to the source device. part; An identification unit for determining whether an error code exists in the response message; And setting an adjustment flag in the request message corresponding to the response message in which the error code exists, re-receiving the request message in which the adjustment flag is set, and converting it into a correction message acceptable in the destination device. It relates to a call processing relay system and a diameter signal adjustment method thereof, including;

Description

Call processing relay system and its diameter signal adjustment method {RELAY SYSTEM FOR CALL PROCESSING AND DIAMETER SIGNAL MEDIATION METHOD THEREOF}

The present invention relates to a call processing relay system for application to a 5G (5Generation, IMT-2020) communication environment and a diameter signal adjustment method thereof.In particular, a 5G relay system when an error occurs in a message transmitted from a source device to a destination device. The present invention relates to a call processing relay system and a diameter signal adjustment method thereof configured to detect this in the destination device and automatically adjust and transmit the message to an acceptable message in the destination device.

In general, signals are exchanged between LTE (Long Term Evolution) systems based on the Diameter Protocol, and some or all of the parameter values of the messages in the diameter are changed due to system upgrades, etc. Can be added/deleted.

In such a case, some of the equipment sending and receiving signals may not recognize the message, and service provision may be impossible.However, it is not possible to immediately recognize the cause of such a situation, so the situation can be identified only after the post-cause analysis is completed. Actually. In other words, after the cause is identified, it can be resolved only by modifying and applying the cause in the system.

In general, it takes a long time to correct the system by recognizing the problem in advance and apply the modified part by recognizing the problem after not recognizing the issue of interworking diameter messages between systems in advance. In addition, it takes a considerable amount of time for a complaint to be raised, as well as to recognize the problem caused by the deterioration of the quality index, analyze the cause for this, and take manual action.

On the other hand, in 5G (5Generation, IMT-2020) communication environment, there is currently no function to automatically detect the cause of the diameter message between systems, that is, to automatically recognize and mediate call processing errors. . In addition, there are no international standards related to this, and even functions necessary for coordination have not been specified.

(0001) Domestic registration patent No. 10-0970207 (0002) Domestic registered patent No. 10-1643840

The technical problem to be solved by the present invention is a call processing relay system configured to automatically detect and perform an adjustment function in a call processing relay system that relays a message when an error occurs in a call processing message in a 5G communication environment, and It is to provide a method of adjusting the diameter signal.

The technical problem to be achieved in the present invention is not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those of ordinary skill in the technical field to which the present invention belongs from the following description. There will be.

According to an embodiment of a call processing relay system according to the present invention for achieving the above technical problem, in a relay system for relaying call processing between a source device and a destination device, the destination device by receiving a request message from the source device A transmission/reception unit for transmitting to the destination device, receiving a response message for the request message from the destination device, and transmitting the response message to the source device; An identification unit for determining whether an error code exists in the response message; And setting an adjustment flag in the request message corresponding to the response message in which the error code exists, re-receiving the request message in which the adjustment flag is set, and converting it into a correction message acceptable in the destination device. It characterized in that it comprises a; processing unit for transmitting to the Nation device.

Here, the processing unit is characterized in that after setting the adjustment rule table acceptable in the destination device, when converting the re-received request message to the correction message, based on the adjustment rule table.

In addition, the adjustment rule may include information on required parameters for each command, an allowable length for each parameter, and an unacceptable parameter for each command accepted by the destination device.

In addition, the adjustment rule may include an attribute value pair (AVP) parameter value.

On the other hand, the processing unit is characterized in that the transmission of the error code generation problem of the received response message to the operator through the transmission and reception unit.

In addition, the processing unit queries the adjustment flag table using the source host, destination host, and command of the request message corresponding to the response message in which the error code exists, and the entry of the request message exists in the adjustment flag table. If the entry does not exist after determining whether or not, an entry of the request message is added to the adjustment flag table.

In addition, the processor may change or remove a preset attribute when a specific attribute is included, and change or remove a preset value when the specific attribute has a specific value.

In addition, the processing unit inquires whether an entry for the request message exists in the adjustment flag table using a source host, a destination host, and a command of the request message corresponding to the response message in which the error code exists, and the If there is an entry in the adjustment flag table, the parameter values of the re-received request messages are sorted by AVP (Attribute Value Pair) and stored as first information, and the destination of the request message corresponding to the response message with the error code The adjustment values for the entries in the adjustment rule table are sorted in AVP units using a nation host and a command, and stored as second information, and the first information is adjusted based on the second information. do.

In addition, the processor may generate and store the second information according to the presence of the next entry.

In addition, the relay system is characterized in that at least one of DRA (Diameter Routing Agent), DEA (Diameter Edge Agent), and SLF (Subscribe Location System).

On the other hand, according to an embodiment of the diameter signal adjustment method in the call processing relay system according to the present invention, in the diameter signal adjustment method in the relay system relaying call processing between a source device and a destination device, the source Receiving a request message from a device and transmitting it to the destination device; Receiving a response message to the request message from the destination device and transmitting it to the source device; Determining whether an error code exists in the received response message; Setting an adjustment flag in a request message corresponding to a response message in which the error code exists; Re-receiving the request message set with the adjustment flag and converting it into a correction message acceptable to the destination device; And transmitting the converted correction message to the destination device.

In this case, the step of setting an acceptable adjustment rule table in the destination device; further comprises, and converts based on the adjustment rule table upon conversion to the correction message.

In addition, the adjustment rule may include information on required parameters for each command, an allowable length for each parameter, and an unacceptable parameter for each command accepted by the destination device.

In addition, the adjustment rule may include an attribute value pair (AVP) parameter value.

In addition, it characterized in that it further comprises a; notification step of notifying the operator of the error code occurrence problem of the received response message.

In addition, the step of setting the adjustment flag may include inquiring the adjustment flag table using a source host, a destination host, and a command of a request message corresponding to the response message in which the error code exists; Determining whether an entry of the request message exists in the adjustment flag table; And adding an entry of the request message to the adjustment flag table when the entry does not exist.

In addition, in the step of converting to the correction message, if a specific attribute is included, a preset attribute is changed or removed, and if a specific attribute has a specific value, a preset value is changed or removed.

In addition, the step of converting to the correction message includes whether an entry for the request message exists in the adjustment flag table using a source host, a destination host, and a command of the request message corresponding to the response message in which the error code exists. Querying; If there is an entry in the adjustment flag table, arranging parameter values of the re-received request message in units of an attribute value pair (AVP) and storing them as first information; Arranging adjustment values for the entries in the adjustment rule table in units of AVP using a destination host and a command of a request message corresponding to the response message in which the error code exists and storing them as second information; And adjusting the first information based on the second information.

On the other hand, the step of generating and storing the second information according to the presence of the next entry; characterized in that it further comprises.

In addition, the relay system is characterized in that at least one of DRA (Diameter Routing Agent), DEA (Diameter Edge Agent), and SLF (Subscribe Location System).

The aspects of the present invention are only some of the preferred embodiments of the present invention, and various embodiments reflecting the technical features of the present invention are detailed description of the present invention to be described below by a person of ordinary skill in the art. Can be derived and understood based on

The effect of the call processing relay system and the diameter signal adjustment method thereof according to the present invention will be described as follows.

First, service due to the difference in message usage during call processing in conjunction with roaming operator systems in LTE Edge call processing systems such as DRA (Diameter Routing Agent) and GLR (Gateway Location Register) as well as 5G (5Generation, IMT-2020) call processing systems. If it is not possible, it can be used to guarantee service continuity.

In addition, LTE services such as SLF (Subscribe Location System) and DEA (Diameter Edge Agent) and 5G call processing systems can also be used to ensure service continuity when service is unavailable due to a difference in message usage during call processing between systems.

In addition, even if the AVP parameters in the interlocking standard have been changed due to system upgrades of the interlocking system or new equipment, but are not detected through quality inspection in advance, they can be used to guarantee service continuity.

In addition, if action is required as a result of analysis of the cause of the message that is an issue in the diameter call processing signal between systems, adjustment rules (Attribute adjustment, Value adjustment) set by the operator in the LTE and 5G relay systems until the system is modified. , Filtering), the message in question can be automatically corrected in the relay system and provided.

In addition, when a message error occurs, the LTE and 5G relay system can take immediate and automatic actions, so it is possible to reduce the correction and verification time required for correcting the cause.

In addition, when a message error occurs, the situation is automatically transmitted to the operator, so it is possible to recognize the immediate situation of the operator.Through this, the operator can respond to an emergency situation and perform additional correction directly even if automatic correction is not possible. The continuity can be further improved.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those of ordinary skill in the art from the following description. will be.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings are provided to aid understanding of the present invention, and provide embodiments of the present invention together with a detailed description. However, the technical features of the present invention are not limited to a specific drawing, and features disclosed in each drawing may be combined with each other to constitute a new embodiment.
1 is a diagram conceptually showing the configuration of LTE equipment using a diameter (diameter),
2 is a diagram according to an embodiment of a diameter signal adjustment method in a call processing relay system according to the present invention,
3 is a diagram showing a flow of a message transmission state and a conversion state to a correct message between a source device and a destination device according to an embodiment of the present invention.
4 is a view showing the adjustment flag setting step according to the present invention,
5 is a diagram showing a step of converting a correction message to which an adjustment rule according to the present invention is applied,
6 is a block diagram of a call processing relay system according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible even if they are indicated on different drawings. In addition, in describing the embodiments of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiments of the present invention, the detailed description thereof will be omitted.

In addition, in describing the constituent elements of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but another component between each component It should be understood that may be “connected”, “coupled” or “connected”.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

First, it can be understood that the LTE described in the present invention includes 3GPP long term evolution (LTE) and LTE advanced (LTE-A). LTE services include LTE (Long Term Evolution), VoLTE (Voice over LTE), and SoI (SMS over IP).

The official term for 5G (5Generation) is IMT-2020, and 5G has the following meanings.

In addition to people, it refers to the Internet of Things targeting things such as surrounding objects and cars. In addition, it refers to a communication service that provides a giga-class ubiquitous network to all users including people and objects cost-effectively and energy-efficiently. In addition, devices are connected through a 5G network, enabling ultra-high-speed, large-capacity, ultra-connected, and ultra-real-time services, providing new value unlike before.

The present invention can be applied to the relay system 100 that relays LTE (4G) or 5G (5Generation, IMT-2020) call processing between the source device 10 and the destination device 20.

In the following description, for convenience, only LTE is described, and the expression LTE should be understood as a term including both 4G and 5G.

The source device 10 is a device that transmits an LTE call processing request message to the destination device 20 through the relay system 100.

The destination device 20 is a device that receives an LTE call processing request message and transmits a response message thereto to the source device 10 through the relay system 100.

The relay system 100 includes a Diameter Routing Agent (DRA), a Diameter Edge Agent (DEA), and a Subscribe Location System (SLF).

1 is a diagram conceptually showing the configuration of LTE equipment using a diameter (diameter).

Referring to FIG. 1, DRA is a system for routing diameter messages, and is a system that provides efficient management of diameter networks, flexible expansion, and network configuration. With the introduction of LTE, the call processing protocol between core network systems uses the diameter standard standard, and at this time, a Diameter Routing Agent (DRA) is required for interworking between systems. When DRA is introduced, it is possible to operate the network only by changing the data of the DRA's own station without changing the data of each system, and in the event of a network failure, it is possible to provide a bypass route and provide a structure for inter-station. In addition, since it provides the convenience of network management, it is possible to simplify the configuration of a complex network. In addition, DRA can provide overload control and fault isolation functions of interlocking devices in a centralized form.

DEA is located at the boundary between the home network and the visited network, and acts as a gateway between the home network and the visited network when roaming subscribers.

The diameter is a protocol for transmitting signals and messages between entities constituting the LTE network. Therefore, for roaming with overseas LTE operators, equipment for diameter interworking is required at the network boundary. DEA supports roaming between LTE networks and reflects the integration policy of each overseas operator.

The Subscriber Location Function (SLF) is an entity in the IP multimedia subsystem that provides information related to the Home Subscriber Server (HSS) interworking with a specific user profile, and is mainly implemented using a database. If there is more than one HSS in the home domain, the I-CSCF and S-CSCF communicate with the SLF and select an appropriate HSS based on the user profile. The CSCF communicates with the SLF using the diameter Dx interface, and the application server communicates with the SLF through the Dh interface.

HSS (Home Subscriber Server) is a database in which a user profile (Subscriber profile) is stored, and provides user authentication information and a user profile to a Mobility Management Entity (MME). That is, it plays the role of a master database of a mobile communication subscriber, and is a kind of database in which a function of a Home Location Register (HLR) and a function for mobility management and authentication of an IP multimedia subscriber are integrated.

AS (Access stratum) refers to a lower level layer protocol. The low-level stage represents a sub-logic structure close to the hardware side. The AS internally plays a role of an interface connecting User Equipment (UE) and Universal Terrestrial Radio Access Network (UTRAN), and UTRAN and Core Network (CN).

CSCF (Call Session Control Function) is a device that handles registration and multimedia call processing functions using SIP (Session Initiation Protocol), and is a relay call control function device (P-CSCF: Proxy-Call Session Control Function), a query/response call. It is divided into a control function device (I-CSCF: Interrogate-Call Session Control Function) and a serving call control function device (S-CSCF: Serving-Call Session Control Function).

The P-CSCF is the point where mobile subscribers first access the network. The P-CSCF performs the role of transmitting the SIP registration request message of the mobile communication subscriber to the I-CSCF by referring to the subscriber's home domain, and maintains the security relationship with the mobile communication subscriber.

I-CSCF acquires the address of the S-CSCF that performs SIP registration of the mobile communication subscriber from the HSS, and allocates the S-CSCF that will actually register the mobile communication subscriber.

The S-CSCF downloads and stores the mobile communication subscriber's subscription information from the HSS and provides the corresponding service to the mobile communication subscriber.

UDC stands for Up Down Converter.

PCRF is an entity that performs policy and billing control and provides policy control decisions and billing control functions.

The S-GW is an end of an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) and an Evolved Packet Core (EPC), and becomes an anchoring point during handover between base stations and handover between 3GPP systems.

Here, the E-UTRAN is composed of at least one base station, and the EPC is composed of S-GW, P-GW and MME.

The P-GW connects the UE with an external packet data network (PDN) and performs a packet filtering function. In addition, the P-GW allocates an IP address to the UE and operates as a mobility anchoring point during handover between the 3GPP system and the non-3GPP system. In particular, the P-GW receives a Policy and Charging Control (PCC) rule from PCRF, applies it to a corresponding service flow, and provides a charging function for each UE/SDF (Service Date Flow).

2 is a diagram according to an embodiment of a diameter signal adjustment method in a call processing relay system according to the present invention, and FIG. 3 is a source device 10 and a destination device 20 according to an embodiment of the present invention. It is a diagram showing the flow of the message transmission status and the conversion status to the correct message.

First, a method of adjusting a diameter signal in a relay system that relays call processing between the source device 10 and the destination device 20 according to the present invention will be described with reference to FIGS. 2 and 3.

The method of adjusting the diameter signal in the call processing relay system of the present invention includes a request message delivery step (S200), a response message delivery step (S300), an error code determination step (S400), an adjustment flag setting step (S600), and a correction message conversion step. It is configured to include (S700) and a correction message delivery step (S800).

In the request message delivery step (S200), the request message (Request 1) generated by the source device 10 is transmitted to the destination device 20. That is, the source device 10 generates a request message (Request 1) and transmits it to the relay system 100. The relay system 100 receives the request message (Request 1) transmitted from the source device 10 and transmits it to the destination device 20. The destination device 20 receives a request message (Request 1) transmitted from the relay system 100.

In the response message delivery step (S300), a response message (Response 1) to the request message (Request 1) received by the destination device is generated and transmitted to the source device (10). That is, the destination device 20 generates a response message (Response 1) and transmits it to the relay system 100. The relay system 100 receives the response message (Response 1) transmitted from the destination device 20 and transmits the first request message (Request 1) to the source device 10 that has generated it. The source device 10 receives a response message (Response 1) transmitted from the relay system 100.

The error code determination step (S400) is a step of determining whether an error code exists in the response message (Response 1) received by the relay system 100. A message transmitted between the source device 10 and the destination device 20 is set and delivered according to a certain communication standard. However, based on the Diameter Protocol, messages (signals) are exchanged between LTE systems, and some of the equipment providing services may change/add/delete messages in the diameter due to system upgrades. That is, an attribute value pair (AVP) parameter value may be changed/added/deleted. The destination device 20 finds such changed/added/deleted parameter values in the received request message (Request 1), and includes an error code in a response message (Response 1) transmitted to the source device 10. And deliver.

4 is a view showing an adjustment flag setting step according to the present invention, and the following description will be described with further reference to FIG. 4.

In the adjustment flag setting step (S600), if there is an error code in the response message (Response 1) transmitted from the destination device 20 to the source device 10, a request corresponding to the response message (Response 1) in which the error code exists. This is the step of setting the adjustment flag for the message (Request 1, 2). Here, the error code present in the response message (Response 1) means that there is an error code in the corresponding request message (Request 1, 2). Therefore, the adjustment flag can be understood as indicating that there is an error in the error code request messages (Request 1, 2). That is, the relay system 100 performs a dictionary function to detect a diameter essential AVP Missing state (Dictionary). Meanwhile, Request 1 and Request 2, which are request messages, can be understood as the same message.

The adjustment flag setting step (S600) includes an adjustment flag table inquiry step (S610), an entry existence determination step (S620), and an entry addition step (S630).

The following [Table 1] shows an example of the Mediation Flag Table.

Setting item Setting value Explanation ORIG HOST SA_CSCF1.lguplus.co.kr Origination Host Information DEST HOST SA_HSS!.lguplus.co.kr Destination Host Information CMD_CODE SAR Diameter Command Code

In the adjustment flag table inquiry step (S610), the source host, destination host, and command of the request message (Request 1, 2) corresponding to the response message (Response 1) in which an error code exists. ) Search the adjustment flag table using the information. The adjustment flag table refers to a table that records information about request messages (Request 1, 2) with error codes. At this time, it is preferable to sort the information on the request messages (Request 1, 2) in units of AVP. In the step of determining whether an entry exists (S620), a request message in which an error occurs in the above-described adjustment flag table (Request 1, 2). In the step of adding an entry (S630), if there is no entry of the request message (Request 1, 2) in which an error occurs in the mediation flag table, the adjustment Add an entry of the request message (Request 1, 2) in which an error occurred in the flag table. After the entry is added as described above, the adjustment flag setting step (S600) ends.

In the correction message conversion step (S700), the request message (Request 2) in which the adjustment flag is set is re-received and converted into a correction message (Request' 2) acceptable by the destination device 20. In other words, after setting a mediation rule acceptable in the destination device 20, the parameter value of the request message (Request 2) in which an error has occurred is changed according to the set adjustment rule through procedures such as change/add/delete. It converts into a message (Request' 2).

Therefore, it is more preferable that the present invention further includes a step (S100) of setting an adjustment rule table.

[Table 2] below shows an example of the mediation rule table.

Setting item Setting value Explanation RULE_ID One AVP Modification Rule ID DEST_HOST SA_HSS1 Destination Host Information CMD_CODE SAR Diameter Command Code AVP_CODE 268 Modification AVP Code ADD_FLAG True Whether AVP Add is applied ADD_VALUE 1234 Value to be added when adding AVP MOD_FLAG True AVP Value Modification applied MOD_COND =246 Value condition when applying modification MOD_CHG)VAL 124 Value to change when satisfied with Value change DEL_FLAG False Whether to apply AVP Delete

In the step of setting the adjustment rule table (S100), the adjustment rule acceptable in the destination device 20 is set in advance, and when converted into the correction message (Request' 2), the adjustment rule table is converted. The adjustment rule may include information on a required parameter for each command, an allowable length for each parameter, and an unacceptable parameter for each command accepted by the destination device 20. In addition, the adjustment rule may include an attribute value pair (AVP) parameter value. Therefore, it can be understood as changing the default value of the request message (Request 2) in which an error occurred. Therefore, the relay system 100 receiving the response message (Response 1) including the error code is the source device ( In response to the request message (Request 1, 2) in which the error has occurred transmitted from 10), the adjustment rule is applied to the standby state. Meanwhile, an error code notification step (S500) may be further included.

In the error code notification step (S500), the error code occurrence problem of the received response message (Response 1) is notified to the operator. As a method of making the operator aware, various known methods can be applied. The operator who recognizes the occurrence of the error code through the error code notification step (S500) can flexibly respond to an emergency situation. In other words, when a message error occurs, the situation is automatically transmitted to the operator, so it is possible to recognize the immediate situation of the operator.Through this, the operator can directly perform additional correction even when automatic correction is not possible along with coping with an emergency situation. The continuity can be further improved.

The source device 10 receiving the response message (Response 1) from the relay system 100 transmits the request message (Request 2) to the destination device 20 through the relay system 100 again.

5 is a view showing a correction message conversion step (S700) to which an adjustment rule according to the present invention is applied, and the following description will be described with further reference to FIG. 5.

In the step of converting to the correction message (S700), the request message (Request 2) in which the adjustment flag is set is re-received and converted into a correction message (Request' 2) acceptable by the destination device 20. If a specific attribute is included in the request message (Request 2) received during this process, it is changed or removed to a preset attribute, and if a specific attribute has a specific value, it is changed or removed to a preset value. That is, the relay system 100 performs an attribute adjustment, a value adjustment, and a filtering function.

The correction message conversion step (S700) includes a step of determining whether an entry exists for the request message (S710), a first information storage step (S720), a second information storage step (S730), and a first information adjustment step (S740). .

In the step of determining whether an entry for the request message exists (S710), the source host of the request message (Request 1, 2) corresponding to the response message (Response 1) in which the error code exists, and the destination host (Dest Host) ) And command information are used to inquire whether there is an entry for the request message (Request 1, 2).

In the first information storage step (S720), if there is an entry in the adjustment flag table, the parameter values of the re-received request message (Request 2) are sorted by AVP (Attribute Value Pair) and stored as first information (in MsgAVP). Save the first AVP).

In the second information storage step (S730), the Mediation Rule Table is performed using a destination host and a command of the request message (Request 1, 2) corresponding to the response message (Response 1) in which the error code exists. The adjustment values for the entries existing in are arranged in AVP units and stored as second information (the first entry AVP is stored in DBAVP).

In the first information adjustment step (S740), the first information is adjusted based on the second information, and includes a first step, a second step, and a third step.

In the first step, when the AVP value of the first information MsgAVP is smaller than the AVP value of the second information DBAVP, it is adjusted to a preset value. That is, the next AVP value is stored in the first information, or if there is no next AVP value, the AVP maximum value is stored and the first information and the second information are compared again.

In the second step, when the AVP value of the first information is the same as the AVP value of the second information, the AVP value of the first information is adjusted to a preset value, and in the third step, the AVP value of the first information is greater than the AVP value of the second information. If so, adjust to the preset value.

In the second and third steps, the AVP value of the first information is changed (CHG: Change)/added (ADD)/Deleted (DEL: Delete) based on the second information. That is, the value of a parameter is changed, an attribute not in the parameter is added, or an unnecessary attribute or a specific value of an attribute is deleted.

In addition, it may further include a second information storage step (S900) for the next entry.

In the step S900 of storing the second information for the next entry, if the next entry exists, the second information is generated and stored (stored in DBAVP as Next AVP).

In the correction message delivery step (S800), the converted correction message (Request' 2) is transmitted to the destination device 20.

Upon receiving the correction message (Request' 2), the destination device 20 transmits a'Response 2 (SUCCESS)', which is a response message for normal reception, to the source device 10 through the relay system 100.

Meanwhile, the relay system 100 may be configured with at least one of a Diameter Routing Agent (DRA), a Diameter Edge Agent (DEA), and a Subscribe Location System (SLF), and may be implemented as a device including all of them. In FIG. 3, the relay system 100 is limited to SLF for convenience.

6 is a block diagram of a call processing relay system according to an embodiment of the present invention.

Referring to Fig. 6, a call processing relay system according to the present invention will be described. Since the call processing relay system may refer to the portion described in connection with the diameter signal adjustment method in the above call processing relay system, the overlapping description will be briefly described.

The call processing relay system 100 according to the present invention includes a transmission/reception unit 110, an identification unit 120, and a processing unit 130.

The transmission/reception unit 110 receives a request message from the source device 10 and transmits it to the destination device 20. In addition, a response message to the request message is received from the destination device 20 and transmitted to the source device 10.

The identification unit 120 determines whether an error code exists in the response message.

The processing unit 130 sets an adjustment flag in the request message corresponding to the response message in which the error code exists, re-receives the request message set with the adjustment flag, and converts it into a correction message acceptable to the destination device 20 It is transmitted to the destination device 20 through the transmission/reception unit 110.

In addition, the processing unit 130 sets an adjustment rule table acceptable in the destination device 20 and converts the re-received request message to the correction message based on the adjustment rule table.

The adjustment rule includes information on a required parameter for each command, an allowable length for each parameter, and an unacceptable parameter for each command accepted by the destination device 20. In addition, the adjustment rule may include an attribute value pair (AVP) parameter value.

In addition, the processing unit 130 transmits the error code generation problem of the received response message to the operator through the transmission/reception unit 110.

In addition, the processing unit 130 queries the adjustment flag table using the source host, destination host, and command of the request message corresponding to the response message in which the error code exists. After determining whether an entry of the request message exists in the adjustment flag table, if the entry does not exist, an entry of the request message is added to the adjustment flag table.

In addition, when a specific attribute is included, the processing unit 130 changes or removes the predetermined attribute. Alternatively, if a specific attribute has a specific value, it is changed to a preset value or removed.

In addition, the processing unit 130 inquires whether an entry for the request message exists in the adjustment flag table using the source host, destination host, and command of the request message corresponding to the response message in which the error code exists. If there is an entry in the adjustment flag table, the parameter values of the re-received request message are sorted in units of an attribute value pair (AVP) and stored as first information. The adjustment values for the entries in the adjustment rule table are sorted in units of AVP by using the destination host and command of the request message corresponding to the response message with the error code, and stored as second information. Thereafter, the first information is adjusted based on the second information.

At this time, when adjusting the first information based on the second information, if the AVP value of the first information is smaller than the AVP value of the second information, the first information is adjusted to a preset value. Even when the AVP value of the first information is the same as the AVP value of the second information, it is adjusted to a preset value, and when the AVP value of the first information is greater than the AVP value of the second information, the AVP value is adjusted to a preset value. .

Here, when the AVP value of the first information is smaller than the AVP value of the second information, when adjusting to a preset value, the next AVP value is stored in the first information, or if there is no next AVP value, the AVP maximum value is stored. The first information and the second information are compared again.

In addition, when the AVP value of the first information is equal to or greater than the AVP value of the second information, when adjusting to a preset value, the AVP value of the first information is changed/added/deleted based on the second information. .

In addition, if the next entry exists, the processing unit 130 generates and stores the second information accordingly, and repeats the aforementioned operation.

According to the present invention described above, transmission and reception between the source device 10 and the destination device 20 in a relay system 100 such as a diameter routing agent (DRA), a subscriber location system (SLF), and a diameter edge agent (DEA). When a message error occurs, it is automatically corrected and transmitted, thereby ensuring continuity of service.

In addition, when a message error occurs, it is possible to immediately take an automatic action in the relay system 100, so that the correction and verification time required for correcting the cause can be reduced.

In addition, when a message error occurs, the situation is automatically transmitted to the operator, so it is possible to recognize the immediate situation of the operator.Through this, the operator can respond to an emergency situation and perform additional correction directly even if automatic correction is not possible. The continuity can be further improved.

In the above, even if all the constituent elements constituting the embodiments of the present invention are described as being combined into one or operating in combination, the present invention is not necessarily limited to these embodiments. That is, within the scope of the object of the present invention, all of the constituent elements may be selectively combined and operated in one or more. In addition, terms such as "include", "consist of" or "have" described above mean that the corresponding component may be present unless otherwise stated, excluding other components Rather, it should be interpreted as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art, unless otherwise defined. Terms generally used, such as terms defined in the dictionary, should be interpreted as being consistent with the meaning of the context of the related technology, and are not interpreted as ideal or excessively formal meanings unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments posted in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

10: source device 20: destination device
100: relay system 110: transceiver
120: identification unit 130: processing unit

Claims (26)

In the diameter signal adjustment method in a relay system for relaying call processing between a source device and a destination device,
Receiving a request message from the source device and transmitting it to the destination device;
Receiving a response message to the request message from the destination device and transmitting it to the source device;
Determining whether an error code exists in the received response message;
Setting an adjustment flag in a request message corresponding to a response message in which the error code exists;
Re-receiving the request message set with the adjustment flag and converting it into a correction message acceptable to the destination device; And
Transmitting the converted correction message to the destination device; diameter signal adjustment method in a call processing relay system comprising a. The method of claim 1,
Further comprising: setting an adjustment rule table acceptable in the destination device,
The diameter signal adjustment method in a call processing relay system, characterized in that the conversion to the correction message is converted based on the adjustment rule table. The method of claim 2,
The adjustment rule includes information on a required parameter for each command, an allowable length for each parameter, and an unacceptable parameter for each command accepted by the destination device. The method of claim 2,
The diameter signal adjustment method in a call processing relay system, characterized in that the adjustment rule includes an attribute value pair (AVP) parameter value. The method of claim 1,
A notification step of recognizing an error code occurrence problem of the received response message to an operator. The diameter signal adjustment method in a call processing relay system further comprising. The method of claim 1,
The step of setting the adjustment flag,
Querying an adjustment flag table using a source host, a destination host, and a command of the request message corresponding to the response message in which the error code exists;
Determining whether an entry of the request message exists in the adjustment flag table; And
Adding an entry of the request message to the adjustment flag table if the entry does not exist. The diameter signal adjustment method in a call processing relay system comprising: The method of claim 1,
In the step of converting to the correction message,
When a specific attribute is included, a preset attribute is changed or removed, and if a specific attribute has a specific value, the diameter signal adjustment method in a call processing relay system is changed or removed. The method of claim 2,
Converting to the correction message,
Querying whether an entry for the request message exists in an adjustment flag table using a source host, a destination host, and a command of the request message corresponding to the response message in which the error code exists;
If there is an entry in the adjustment flag table, arranging parameter values of the re-received request message in units of an attribute value pair (AVP) and storing them as first information;
Arranging adjustment values for the entries in the adjustment rule table in units of AVP using a destination host and a command of a request message corresponding to the response message in which the error code exists and storing them as second information; And
Adjusting the first information based on the second information; Diameter signal adjustment method in a call processing relay system comprising a. The method of claim 8,
Adjusting the first information based on the second information,
A first step of adjusting to a preset value when the AVP value of the first information is smaller than the AVP value of the second information;
A second step of adjusting to a preset value when the AVP value of the first information is the same as the AVP value of the second information; And
And a third step of adjusting the AVP value of the first information to a preset value when the AVP value of the second information is greater than the AVP value of the second information. The method of claim 9,
In the first step, a next AVP value is stored in the first information, or if there is no next AVP value, the AVP maximum value is stored and the first information and the second information are compared again. How to adjust the meter signal. The method of claim 9,
In the second and third steps, the diameter signal adjustment method in a call processing relay system, wherein the AVP value of the first information is changed/added/deleted based on the second information. The method of claim 8,
If the next entry exists, generating and storing the second information according to the; diameter signal adjustment method in the call processing relay system further comprising. The method of claim 1,
The relay system is a diameter signal adjustment method in a call processing relay system, characterized in that at least one of DRA (Diameter Routing Agent), DEA (Diameter Edge Agent), and SLF (Subscribe Location System). In a relay system for relaying call processing between a source device and a destination device,
A transmitting/receiving unit receiving a request message from the source device and transmitting it to the destination device, and receiving a response message to the request message from the destination device and transmitting it to the source device;
An identification unit for determining whether an error code exists in the response message; And
An adjustment flag is set in the request message corresponding to the response message in which the error code exists, and the request message with the adjustment flag set is re-received and converted into a correction message acceptable in the destination device, and then the destination through the transmission/reception unit. Call processing relay system comprising a; processing unit for transmitting to the device. The method of claim 14,
And the processing unit converts the re-received request message to the correction message based on the adjustment rule table after setting an acceptable adjustment rule table in the destination device. The method of claim 15,
And the adjustment rule includes information on a required parameter for each command, an allowable length for each parameter, and an unacceptable parameter for each command accepted by the destination device. The method of claim 15,
The call processing relay system, characterized in that the adjustment rule includes an attribute value pair (AVP) parameter value. The method of claim 14,
The processing unit, the call processing relay system, characterized in that for transmitting the error code generation problem of the received response message to the operator through the transmission and reception unit. The method of claim 14,
The processing unit,
Inquire the adjustment flag table using the source host, destination host, and command of the request message corresponding to the response message in which the error code exists,
And adding an entry of the request message to the adjustment flag table when the entry does not exist after determining whether an entry of the request message exists in the adjustment flag table. The method of claim 14,
The processing unit,
A call processing relay system, characterized in that when a specific attribute is included, a preset attribute is changed or removed, and if a specific attribute has a specific value, a preset value is changed or removed. The method of claim 15,
The processing unit,
Inquiring whether or not an entry for the request message exists in the adjustment flag table using the source host, destination host, and command of the request message corresponding to the response message in which the error code exists,
When there is an entry in the adjustment flag table, the parameter values of the re-received request message are sorted by AVP (Attribute Value Pair) and stored as first information,
By using the destination host and command of the request message corresponding to the response message in which the error code exists, the adjustment value for the entry in the adjustment rule table is sorted in units of AVP and stored as second information,
A call processing relay system, characterized in that adjusting the first information based on the second information. The method of claim 21,
When adjusting the first information based on the second information,
If the AVP value of the first information is smaller than the AVP value of the second information, it is adjusted to a preset value,
When the AVP value of the first information is the same as the AVP value of the second information, it is adjusted to a preset value,
When the AVP value of the first information is greater than the AVP value of the second information, the call processing relay system is adjusted to a preset value. The method of claim 22,
When the AVP value of the first information is smaller than the AVP value of the second information, when adjusting to a preset value,
And storing a next AVP value in the first information or storing a maximum AVP value if there is no next AVP value, and comparing the first information with the second information again. The method of claim 22,
When the AVP value of the first information is equal to or greater than the AVP value of the second information, when adjusting to a preset value,
And changing/adding/deleting the AVP value of the first information based on the second information. The method of claim 21,
The processing unit,
And generating and storing the second information according to the occurrence of the next entry. The method of claim 14,
The relay system is a call processing relay system, characterized in that at least one of DRA (Diameter Routing Agent), DEA (Diameter Edge Agent), and SLF (Subscribe Location System).

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