KR100866778B1 - Method, System and Apparatus for Assigning Resource to Relay Line for Call Processing - Google Patents

Abstract

The present invention relates to a method and system for allocating a relay line for call processing.

According to the present invention, a mobile communication switching center server requesting to allocate a resource by designating a specific relay line for relaying a call among a plurality of relay lines and requesting reallocation of the resource when notified that the allocation of the resource to the specific relay line has failed. (MSV: Mobile Switching Center Server); And a plurality of Switching Service Processors (SSPs), which are in charge of a plurality of relay lines, and are responsible for a specific relay line when a request is made to allocate resources for a specific relay line from a mobile communication switching center server. Attempts to allocate resources to a specific relay line using a specific SSP, and if the resource allocation fails, it is notified that the allocation of resources to the mobile switching center server has failed, and when a request is made to allocate resources from the mobile switching center server, A media gateway (MGW: Media Gateway) for allocating resources to other relay lines among a plurality of relay lines using different SSPs among the SSPs is provided.

According to the present invention, when allocating resources to a relay line to process a call, it is possible to minimize or eliminate an unreasonable completion of call processing due to a failure of a specific equipment or a lack of vocoder resources, and thereby voice. Improve the quality of call service.

Mobile communication, switching center, server, media, gateway, trunk line, resource, MSV, MGW

Description

Method, System and Apparatus for Assigning Resource to Relay Line for Call Processing

1 is a block diagram schematically illustrating a resource allocation system of a relay line for call processing according to a preferred embodiment of the present invention;

2 is a flowchart illustrating a resource allocation method of a relay line for call processing according to a preferred embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

110: first mobile communication terminal 112: second mobile communication terminal

140: first MSC 150: first MSV

160: first MGW 170: HLR

180: first relay line 182: second relay line

The present invention relates to a method, a system and an apparatus for allocating a relay line for call processing. More specifically, a mobile communication switching center (CSC) that performs circuit switching (CS) in an asynchronous mobile communication system such as a wideband code division multiple access (WCDMA) system. In the Mobile Switching Center, hereinafter referred to as MSC, a mobile switching center server (MSV: Mobile Switching Center Server, hereinafter referred to as MSV) is called a media gateway (MGW: MGW). For processing, after requesting resource allocation by designating a relay line under the control of a specific Switching Service Processor (SSP), the MGW receives a response to the resource allocation failure. A method, system and apparatus for resolving call processing failure due to a failure of a specific SSP by re-requesting a resource reservation.

Recently, with the development of computer and communication technology, various wireless communication services are provided using a wireless communication network. The most basic wireless communication service is a wireless voice call service that provides a voice call to a mobile terminal user wirelessly, which can provide a service regardless of time and place. In addition, while supplementing the voice call service by providing a text message service, recently, a wireless Internet service that provides an Internet communication service to a user of a mobile communication terminal through a wireless communication network has emerged.

In order to provide such a service, a mobile communication system has been developed through a first generation analog AMPS (Advanced Mobile Phone System) method and a second generation cellular / personal communication service (PCS) method. The IMT-2000 (International Mobile Telecommunication 2000), which is a third generation mobile communication system established by ITU-R as a standard, is commercially available.

The IMT-2000 is, for example, CDMA 2000 1x, CDMA 2000 EV-DO, WCDMA, etc., which can service data communication at a higher speed than the data rates supported by existing IS-95A, IS-95B, and IS-95C networks. System. In particular, using the IMT-2000 system, it is possible to provide various multimedia services at a faster speed as well as to improve the quality of services using existing voice communication services and WAP (Wireless Application Protocol).

Here, the CDMA 2000 system is a mobile communication system synchronously implemented in the IMT-2000 system, and is divided into 1x and 3x according to the number of FAs used as carriers. In addition, there are various technology schemes such as 1x EV-DO and 1x EV-DV according to the evolutionary contents. Accordingly, the CDMA 2000 system can be classified into a CDMA 2000 1x, a CDMA 2000 EV-DO (or EV-DV), and a CDMA 2000 3x system according to the number and evolution of FAs. As such, the CDMA 2000 system is a concept encompassing a system implemented by various technical methods.

In addition, the WCDMA system is a mobile communication system asynchronously implemented in the IMT-2000 system, the wireless access method for communication between the base station and the mobile terminal uses the CDMA method, but the mobile communication network related technology GSM (Global System for Mobile Communication) Based on network technology. The WCDMA method does not need to use Global Positioning System (GPS) to synchronize the entire base station, supports international roaming service, widens the frequency bandwidth to 5 MHz, and has a data transmission rate of 2 Mbps, which is suitable for high-speed data transmission. Do.

On the other hand, in an asynchronous mobile communication system such as a WCDMA system, the MSC is composed of MSV and MGW. Here, the MSV plays a role of call control, mobility management, location registration management, call relaying, and the like, and controls a plurality of MGWs. The MGW is composed of a plurality of SSPs serving as switches for providing a communication path, and is physically connected to a Radio Network Controller (RNC) serving as a base station controller. It performs resource allocation / release function, transcoding function, etc.

In order to perform call processing in the MSC, the MSV requires MGW to allocate resources for call processing to the relay line.The MSV can grasp only the resource status of the relay line under the control of the MGW. Require resource allocation to the MGW. The MGW, which has been requested for resource allocation, controls the SSP in charge of the relay line designated by the MSV to perform resource allocation.

However, since a number of SSPs in the MGW manage the trunk line resources and vocoder resources, SSPs controlled to perform resource allocation have resources in the designated trunk line when the resource is allocated to the trunk line and the vocoder. There may be a case in which there is no margin, and there is a problem in that resource allocation of the relay line for call processing fails.

That is, in a mobile communication system, a relay line resource or a vocoder resource to be allocated by an SSP is determined according to a call type. Depending on the type of a call, there may be a case where there is a margin in a relay line resource in charge of an SSP but a vocoder resource. In the MSV, which can identify only the relay line resources of the MGW (i.e., only the status of the trunk line resources of the multiple SSPs in the MGW, and the resource status of the vocoders in charge of the SSPs), both the relay line resources and the vocoder resources are For the call processing to be allocated, if a specific relay line is designated by considering only the resource status of the relay line as described above, and the resource allocation is requested to the MGW, the SSP in charge of the designated relay line can not afford the vocoder resource. Fail, the MGW notifies the MSV that the resource allocation has failed, and the MSV When notified that the allocation has failed, there is a problem that call processing is stopped and call processing finally fails.

However, this is not because there is not a shortage of resources for call processing, because MSV only grasps the resource status of the relay line and assigns the relay line and requests resource allocation to the MGW without knowing the resource status of the vocoder. That is, if a different relay line is designated, even though the resource allocation can be successful, the MSV fails to grasp the resource status of the vocoder and thus fails to allocate the resource and thus the final call processing fails.

This problem occurs because the MSV can only grasp the resource status of the relay line under the control of the MGW and cannot grasp the vocoder's resources. However, in order to solve such a problem, if the MSV to grasp the resources of the vocoder governing MGW, there is a problem that the burden of the MSV increases.

Therefore, the MSV only grasps the resource status of the MGW's relay line and requests resource allocation for call processing, and if the SSP's vocoder has insufficient resources or the SSP has failed due to the SSP's circumstances (ie For example, even if the MGW fails to allocate resources to the designated relay line, there is an urgent need for a method of minimizing or eliminating call processing failure by preventing call processing from failing.

In order to solve this problem, in the MSC performing circuit switching in an asynchronous mobile communication system such as a WCDMA system, after requesting resource reservation by designating a relay line that a specific SSP for a call processing is handled by the MSV to MGW, It is an object of the present invention to provide a method, system, and apparatus for resolving a call processing failure due to a failure of a specific SSP by re-requesting a resource reservation to the MGW upon receiving a response to the failure of the resource reservation from the MGW.

In order to achieve the above object, the present invention provides a wideband code division multiple access (WCDMA) system, comprising: a first mobile communication terminal for transmitting a call; A second mobile communication terminal for receiving a call; And when the call is received from the calling mobile terminal, allocates a resource to a specific relay line among the plurality of relay lines to relay the call to the second mobile terminal, but fails to allocate resources to the specific relay line. Provided is a resource allocation system of a relay line for call processing, comprising a mobile switching center (MSC) for reallocating resources to another relay line.

According to another object of the present invention, in a system including a first mobile communication terminal, a second mobile communication terminal, and a mobile communication switching station, the mobile communication switching station moves the requested call from the first mobile communication terminal to the second movement. A method for allocating resources to a relay line for relaying to a communication terminal, the method comprising: (a) designating a specific relay line for relaying a call among a plurality of relay lines; (b) attempting to allocate resources for a particular relay line; (c) retrying resource allocation to another relay line among the plurality of relay lines when the resource allocation fails in the specific relay line; (d) treating the call as a failure if it fails to allocate resources to another relay line; And (e) if it is successful in allocating resources to the other relay line, relaying the call through the other relay line.

According to still another object of the present invention, there is provided a device for allocating resources to a relay line for relaying a call between a first mobile communication terminal and a second mobile communication terminal, the apparatus for assigning a call among a plurality of relay lines. A mobile switching center server (MSV) requesting to allocate a resource by designating a relay line and requesting reallocation of a resource when notified that the resource has failed to be allocated to a specific relay line; And a plurality of Switching Service Processors (SSPs), which are in charge of a plurality of relay lines, and are responsible for a specific relay line when a request is made to allocate resources for a specific relay line from a mobile communication switching center server. Attempts to allocate resources to a specific relay line using a specific SSP, and if the resource allocation fails, it is notified that the allocation of resources to the mobile switching center server has failed, and when a request is made to allocate resources from the mobile switching center server, A media gateway (MGW: Media Gateway) for allocating resources to other relay lines among a plurality of relay lines using different SSPs among the SSPs is provided.

Further, according to another object of the present invention, in a device including a mobile switching center server (MSV) and a media gateway (MGW), between the first mobile communication terminal and the second mobile communication terminal A method of allocating resources to a trunk line for relaying a call, the method comprising: (a) a mobile switching center server requesting a media gateway to allocate a resource to a specific trunk line by designating a specific relay line among a plurality of relay lines in charge of the media gateway; Doing; (b) The media gateway attempts to allocate a resource to a specific relay line using a specific SSP serving a specific relay line among a plurality of Switching Service Processors (SSPs) that are responsible for a plurality of relay lines. step; (c) if the media gateway fails to allocate resources to a particular trunk line, notifying the mobile switching center server that it has failed to allocate resources; (d) re-requesting, by the mobile switching center server, to allocate resources to the media gateway; And (e) the media gateway attempting to allocate a resource to another relay line among the plurality of relay lines using another SSP among the plurality of SSPs.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are designated as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

In the following description of a preferred embodiment of the present invention, it is assumed that a mobile communication system is a wideband code division multiple access (WCDMA) system. However, this assumption is only for convenience of description, and the present invention may be applied to a mobile communication system of another asynchronous transmission method.

1 is a block diagram schematically illustrating a system for allocating a resource line of a relay line for call processing according to an exemplary embodiment of the present invention.

In the resource allocation system of a relay line for call processing according to a preferred embodiment of the present invention, a first mobile communication terminal 110, a second mobile communication terminal 112, a first Node B 120, and a second Node B 122 are described. ), A first radio network controller (RNC: hereinafter referred to as 'RNC', 130), a second RNC 132, a first mobile switching center (MSC), hereinafter referred to as 'MSC', 140, a second MSC 142, a home location register (HLR), and a plurality of relay lines 180 and 182.

The first mobile communication terminal 110 and the second mobile communication terminal 112 are mobile communication services using mobile communication networks 120, 122, 130, 132, 140, 142, 170, 180, and 182 implemented as WCDMA systems. As a mobile communication terminal provided with, it is wirelessly connected to the first Node B (120) and the second Node (122), respectively.

The first mobile communication terminal 110 according to the preferred embodiment of the present invention is a mobile communication terminal for making a voice call with the second mobile communication terminal 112 using the above-described mobile communication network, and the first Node B 120. And make a call to the first MSC 140 via the first RNC 130. In addition, the second mobile communication terminal 112 according to the preferred embodiment of the present invention is a mobile communication terminal for making a voice call with the first mobile communication terminal 110 using the above-described mobile communication network. 122), the call is relayed through the second RNC 132 and the second MSC 142.

The first Node B 120 and the second Node B 122 are wirelessly connected to the first mobile communication terminal 110 and the second mobile communication terminal 112, respectively, and the first RNC 130 and the second RNC In connection with 132, it serves as a base station of a mobile communication network.

The first RNC 130 and the second RNC 132 are connected to the first Node B 120 and the second Node B 122 and the first MSC 140 and the second MSC 142, respectively. It serves as a base station controller of a mobile communication network.

The first MSC 140 and the second MSC 142 are connected to the first RNC 130 and the second RNC 132, respectively, and connected to the HLR 170, and each of a plurality of relay lines (ie, first It is connected through the relay line 180 to the n-th relay line 182, and serves as a mobile communication switching center of the mobile communication network.

When the first MSC 140 and the second MSC 142 according to the preferred embodiment of the present invention receive a call from the mobile communication terminal (the first mobile communication terminal 110 or the second mobile communication terminal 112) In order to relay a call to another mobile communication terminal (first mobile communication terminal 110 or second mobile communication terminal 112), a resource is allocated to a specific relay line among a plurality of relay lines, but the resource is allocated to a specific relay line. If it fails, reallocate resources to another of the multiple trunks.

In addition, the first MSC 140 and the second MSC 142 according to the preferred embodiment of the present invention are the first mobile communication switching center server (MSV: MSC Server, hereinafter referred to as "MSV", 150) and the first media, respectively. A gateway (MGW: Media Gateway, hereinafter referred to as MGW) 160 and a second MSV 152 and a second MGW 162 are included.

Here, the first MSV 150 and the second MSV 152 are call control, mobility management, and visitor location registers (VLRs) among the functions of the first MSC 140 and the second MSC 142, respectively. It is a server of MSC that provides the functions and controls various call relays to other networks by providing various additional services or connecting to other networks.

In addition, the first MGW 160 and the second MGW 162 are composed of a plurality of Switching Service Processors (SSPs) for providing a call path, a voice traffic transmission function and a resource allocation / release function therefor. It also provides transcoding, tone and announcement generation.

The first MSV 150 is connected to the HLR 170 and the first MGW 160, and the first MGW 160 is connected to the first RNC 130, the first MSV 150, and the second MGW 162. The second MSV 152 is connected to the HLR 170 and the first MGW 160, and the second MGW 162 is connected to the second RNC 132, the second MSV 152 and the first MGW ( 160). In addition, the first MGW 160 and the second MGW 162 are connected to each other through a plurality of relay lines of the first relay line 180 to the nth relay line 182.

The first MSV 150 according to the preferred embodiment of the present invention stores information on the resource status of the plurality of relay lines 180 and 182 in charge of the first MGW 160 to store the information on the resource status of the plurality of relay lines 180 and 182. Understand the status of resources. Therefore, when the first MSV 150 receives the call call from the first mobile communication terminal 110, the first MSV 150 inquires the routing information to the HLR 170, receives the routing information as a response, and analyzes the routing information to make the call. After identifying the second MSC 140 to be relayed, the resource status of the plurality of relay lines 180 and 182 in charge of the first MGW 160 in order to relay the call in connection with the second MSC 140 is determined. After confirming, after designating a specific relay line that is not already occupied by the resource, the first MGW 160 requests the resource to be allocated.

In addition, after the first MSV 150 according to the preferred embodiment of the present invention requests the first MGW 150 to allocate a resource to a specific relay line, resource allocation for the specific relay line has failed from the first MGW 150. When notified, the first MGW 160 requests to allocate resources again. In addition, the first MSV 150 requests the first MGW 160 to allocate resources, and then receives the first MSV 150 from the first mobile communication terminal 110 when it is notified that the resource allocation is successful. The process of handling the call by relaying the call through the corresponding relay line (processing the call by relaying the call can be carried out by those of ordinary skill in the art. If notified that the resource allocation has failed from the first MGW 150, the call call received from the first mobile communication terminal 110 is treated as a failure.

That is, according to a conventional procedure, the first MSV 150 designates a specific relay line and requests to allocate resources to the first MGW 160, and then informs that the allocation of resources from the first MGW 160 has failed. If received, the relay of the call is treated as a failure, whereas if the first MSV 150 according to a preferred embodiment of the present invention is notified that it has failed to allocate resources for a specific relay line, the processing of the call is not treated as a failure. The first MGW 160 requests again to allocate resources to the relay line.

When the first MGW 160 according to the preferred embodiment of the present invention receives a request from the first MSV 150 to allocate a specific relay line and allocates resources, the first MGW 160 selects a specific SSP in charge of the designated specific relay line among the plurality of SSPs. Attempt to allocate resources for the designated trunk.

At this time, since a resource is not occupied in a relay line that is in charge of a specific SSP, resources may be allocated to the relay line, but a situation may occur in which a vocoder resource of a specific SSP is previously occupied for a previous call processing. In some cases, it may not be possible to allocate resources of a vocoder for call call relay. In addition, although a relay line resource and a vocoder resource that are in charge of a specific SSP are not occupied, resources may be allocated. However, a failure occurs in a specific SSP, and thus a resource may not be allocated to the corresponding relay line using a specific SSP. have. In this case, the first MGW 160 notifies the first MSV 150 that it has failed to allocate resources to the designated particular relay line.

In addition, the first MGW 160 according to the preferred embodiment of the present invention informs the relay line from the first MSV 150 after notifying that the resource allocation to the specific relay line designated as the first MSV 150 has failed. When reassigned to be allocated, resource allocation is attempted using another SSP that is in charge of a relay line other than the specific relay line immediately specified among the plurality of relay lines. That is, since the first MGW 160 can know the information on the specific SSP that failed to allocate the resource, when the first MSV 150 is requested to reallocate the resource, the first MGW 160 uses another SSP other than the specific SSP. Attempts to allocate the resource to another relay line using another SSP, and if it succeeds in allocating the resource to another relay line using another SSP, the resource is transmitted to the first MSV 150. Notify that the allocation is successful, and if it fails to allocate resources to another relay line using another SSP, the first MSV 150 notifies that the resource allocation has failed.

On the other hand, when the first MGW 150 according to the preferred embodiment of the present invention is re-requested to allocate resources to the relay line from the first MSV 150, in order to allocate resources to another relay line as previously described, You can simply select a SSP other than the specific SSP that is responsible for the specified relay, but check the relay line and vocoder resources of the remaining SSPs other than the specific SSP among the multiple SSPs that you have. An SSP that is not already occupied may be selected as another SSP. That is, although the first MGW 150 may arbitrarily select an SSP other than a specific SSP previously designated from among a plurality of SSPs provided without any criterion, the first MGW 150 may select the relay line resource, the vocoder resource, and the failure status of the remaining SSPs other than the specific SSP. The overall judgment may be to select a different SSP.

The HLR 170 is a database that stores service profiles related to mobile subscriber information. The HLR 170 includes a terminal identification number of a mobile communication terminal (that is, a first mobile terminal 110 and a second mobile communication terminal 112). Stores subscriber information by storing information about Mobile Identification Number (MIN), Electronic Serial Number (ESN) and service type.

When the HLR 170 according to the preferred embodiment of the present invention receives information on the second mobile communication terminal 112 from the first MSV 150 of the first MSC 140 and requests routing information, the second mobile After confirming the location of the communication terminal 112 to generate routing information for the second MSC 142, which is a mobile communication switching center for the area where the second mobile communication terminal 112 is located, and then to the first MSV 140. to provide.

2 is a flowchart illustrating a resource allocation method of a relay line for call processing according to a preferred embodiment of the present invention.

When the caller using the first mobile communication terminal 110 operates the first mobile communication terminal 110 to make a call with the called party using the second mobile communication terminal 112, the first mobile communication terminal ( 110 sends a call and requests a call to the first MSC 140 (S202).

When the first MSC 140 receives a call request from the first mobile communication terminal 110, the first MSV 150 translates the phone number of the second mobile communication terminal 112 included in the call, and calls the call. In order to confirm the mobile communication exchange that forwarded the request routing information to the HLR (170) (S204), and receives the routing information (S206).

In response to the routing information, the first MSV 150 determines that the call should be relayed to the second MSC 142, and designates a relay line for relaying the call to the second MSC 142. The resource status of the plurality of relay lines 180 and 182 included in the MGW 160 is searched, and a specific relay line in which resources are not occupied among the plurality of relay lines 180 and 182 is designated (S208), and the first MGW ( In step S210, a request is made to allocate resources to a specific relay line. Hereinafter, it is assumed that the first relay line 180 is designated for convenience of description.

The first MGW 160, which is requested to allocate resources to the first relay line 180, attempts to allocate a resource to a specific relay line using a specific SSP that is in charge of the first relay line 180 among a plurality of SSPs provided. In step S212, it is checked whether resource allocation is successful (S214).

Here, the first MGW 160 checks whether there is a resource already occupied by the resources of the relay line of a specific SSP, whether there is a resource occupied by the resources of the vocoder of a specific SSP, and whether a failure occurs in a specific SSP. Check whether the resource allocation to a specific relay line is successful using a specific SSP.

That is, since the first MSV 150 has already grasped the resources of the plurality of relay lines 180 and 182 in charge of the first MGW 160, a specific relay line is selected which is a relay line whose resources are not occupied by the relay line. Naturally, the resources of a relay line of a specific SSP in charge of a specific relay line do not have any resources already occupied, but the vocoder resources of a specific SSP may have resources already occupied for previous call processing, and even if a specific SSP fails However, since the resource cannot be successfully allocated to a specific relay line, the number of all cases should be checked as described above.

The first MGW 160 proceeds to the normal call processing procedure when resource allocation to the specific relay line is successful using the specific SSP as a result of confirming in step S214 (S216). Here, a typical call processing procedure informs that the first MGW 160 has succeeded in allocating resources to a specified relay line, and the first MSV 150 forwards the call to the second MSC 142 via the specific relay line. The transmission refers to a series of procedures for relaying a call between the first mobile communication terminal 110 and the second mobile communication terminal 112. This conventional call processing procedure can be easily carried out by those skilled in the art, so a detailed description thereof will be omitted.

On the other hand, if the first MGW 160 fails to allocate resources to a specific relay line using a specific SSP as a result of checking in step S214, the first MGW 160 notifies the first MSV 150 that it has failed to allocate resources to the specific relay line (S218). ). Here, the first MGW 160 notifies the first MSV 150 that it has failed to allocate a resource to a specific relay line, but in reality, when the resource is allocated to a specific relay line and fails to allocate the relay line resource, the specific relay line It is notified that it is one or more of the cases where the vocoder resource fails to allocate the vocoder resource due to the preoccupation of the vocoder resource in charge of the specific SSP and the allocation of the trunk line resource and the vocoder resource due to a failure in the specific SSP.

In a typical call processing procedure, when the first MSV 150 is notified from the first MGW 160 that it has failed to allocate resources to a particular relay line, the first MSV 150 allocates resources to the relay line that will relay the call. Recognizing that the call can not be relayed because it can not be considered, the call processing is treated as a failure, and the first mobile communication terminal 110 is notified of the call processing failure. However, in this case, only the failure of a specific SSP or the vocoder resource of a specific SSP is pre-occupied, and other SSPs among the plurality of SSPs provided by the first MGW 150 are normal or not occupied by the vocoder's resources. In this case, although the call can be relayed through another relay line, it is not preferable because the processing of the call is unsuccessful, which leads to an unnecessarily high rate of call processing, which ultimately affects the quality of service.

However, in the preferred embodiment of the present invention, even if the first MSV 150 is informed from the first MGW 160 that it has failed to allocate a resource to a specific relay line, the first MGW 160 allocates resources to the first MGW 160. By requesting again (S220), the resource allocation of the relay line for call processing is retried. In this case, as in step S210, a specific relay line is designated and the resource is not requested to be allocated, but only the resource line is allocated again.

The first MGW 160 that has been re-requested to allocate resources to the relay line assumes that the n-th relay line 182 is selected for convenience of explanation other than the previously designated first relay line 180. Select.) To select another SSP in charge of the n th relay line among the plurality of SSPs provided, and attempt to allocate resources to the n th relay line rather than the first relay line 180 using the other SSP (S222).

That is, since the first MGW 160 stores a specific relay line for which resource allocation is requested from the first MSV 150 and a specific SSP that is in charge of the specific relay line in step S210, the first MGW 160 stores a relay line different from that of the other relay line other than the specific relay line. Select another SSP in charge and attempt to allocate resources to other trunks using the other SSP. In this case, since two SSPs fail at the same time or vocoder resources of two SSPs are rarely occupied, the probability of successful resource allocation is high.

The first MGW 160 who attempts to allocate a resource to the nth relay line checks whether or not it succeeds in allocating a resource to the nth relay line using another SSP (S224), and if the resource allocation is successful, the first MSV 150. In step S226, the first MSV 150 proceeds to the normal call processing procedure described above (S228).

On the other hand, if the first MGW 160 fails to allocate resources to the nth relay line in step S224, the first MGW 160 notifies the first MSV 150 that it failed to allocate resources to the relay line (S230), and the first MSV. 150 finally processes the call processing as a failure (S232).

At this time, the first MSV 150 notified that the allocation of the resource to the relay line has failed does not process the call as a failure as described above, and again requests to allocate the resource to the relay line as in step S220. Thus, steps S220 to S232 may be repeated until resources are allocated to the relay line, and the procedure may be repeated only a predetermined number of times.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention but to describe the present invention, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, when allocating resources to a relay line for processing a call in an asynchronous transmission type mobile communication system, it is unreasonable for reasons such as a failure of a specific equipment (SSP) or a lack of vocoder resources. It is possible to minimize or eliminate the incomplete call processing, thereby improving the quality of the voice call service.

Claims (11)

In a wideband code division multiple access (WCDMA) system, A first mobile communication terminal for making a call; A second mobile communication terminal for receiving the call; And When the call is received from the first mobile communication terminal, resources are allocated to a specific relay line among a plurality of relay lines to relay the call to the second mobile communication terminal, and the resource is allocated to the specific relay line. If not, a mobile switching center (MSC) for reallocating the resource to another of the plurality of relay lines Resource allocation system of the relay line for call processing, comprising a. The mobile communication switching center of claim 1, A mobile switching center server (MSV) requesting to allocate the resource by designating the specific relay line and requesting reallocation of the resource when notified that the allocation of the resource to the specific relay line has failed. ; And And a plurality of Switching Service Processors (SSPs), which are in charge of the plurality of relay lines, and are requested to allocate the resources to the specific relay line from the mobile communication exchange server. Attempts to allocate resources to the specific relay line using a specific SSP in charge of the specific relay line, and if the resource allocation fails, notifies the mobile communication switching center server that the allocation of the resource has failed. A media gateway (MGW) for allocating the resource to another relay line of the plurality of relay lines by using another SSP among the plurality of SSPs when requested to reallocate the resource from a plurality of SSPs; Resource allocation system of the relay line for call processing, comprising a. In a system including a first mobile communication terminal, a second mobile communication terminal, and a mobile communication switching station, the mobile communication switching center is connected to a relay line for relaying a call call requested from the first mobile communication terminal to the second mobile communication terminal. In the method of allocating resources, (a) designating a specific relay line for relaying the call among a plurality of relay lines; (b) attempting to allocate resources to the specific relay line; (c) retrying the resource allocation to another relay line among the plurality of relay lines when the resource allocation fails in the specific relay line; (d) treating the call as a failure if it fails to allocate the resource to the other relay line; And (e) if the call is successfully allocated to the other relay line, relaying the call through the other relay line; Resource allocation method of the relay line for call processing comprising a. An apparatus for allocating resources to a relay line for relaying a call between a first mobile communication terminal and a second mobile communication terminal, A mobile communication requesting to allocate the resource by designating a specific relay line for relaying the call among a plurality of relay lines, and requesting reallocation of the resource when notified that the allocation of the resource to the specific relay line has failed. Switching center server (MSV: Mobile Switching Center Server); And And a plurality of Switching Service Processors (SSPs), which are in charge of the plurality of relay lines, when the mobile communication switching center server is requested to allocate the resources to the specific relay line. Attempts to allocate resources to the specific relay line using a specific SSP in charge of a specific relay line, and if the resource allocation fails, it is notified that the resource allocation failed to the mobile switching center server. A media gateway (MGW: Media Gateway) for allocating the resource to another relay line of the plurality of relay lines by using another SSP among the plurality of SSPs when the request for allocating the resource is requested again. Resource allocation apparatus for a relay line for call processing, comprising a. The mobile communication switching center server of claim 4, Whenever it is notified that the resource allocation has failed, the resource allocation apparatus for the trunk line for call processing is repeatedly requested again to allocate the resource, but repeatedly requests up to a predetermined number of times. The method of claim 4, wherein the media gateway, The apparatus for allocating a relay line for call processing according to claim 8, wherein the vocoder resource of the specific SSP is checked and the vocoder resource is pre-occupied, and is determined as if the resource cannot be allocated. The method of claim 4, wherein the media gateway, The apparatus for allocating a relay line for call processing according to claim 1, wherein it is determined whether or not the resource cannot be allocated when the failure occurs in the specific SSP by checking whether the failure occurs in the specific SSP. The method of claim 4, wherein the media gateway, Upon receiving a request for allocating the resource from the mobile communication switching center server, the relay line resource and the vocoder resource of the remaining SSPs other than the specific SSP among the plurality of SSPs are checked, and the relay line resource and the vocoder resource of the remaining SSPs are pre-existed. And an SSP that is not occupied is determined as the other SSP. In a device including a mobile switching center server (MSV) and a media gateway (MGW), resources are allocated to a relay line for relaying a call between a first mobile terminal and a second mobile terminal. In the way, (a) the mobile telecommunication switching center server designating a specific relay line among a plurality of relay lines in charge of the media gateway, and requesting the media gateway to allocate the resource to the specific relay line; (b) The media gateway uses the specific SSP for the specific relay line from among a plurality of Switching Service Processors (SSPs) for the plurality of relay lines to provide resources to the specific relay line. Attempting an assignment; (c) if the media gateway fails to allocate the resource to the specific relay line, notifying the mobile communication switching center server that the resource gateway has failed to allocate the resource; (d) the mobile communication switching center server re-requesting to allocate the resource to the media gateway; And (e) the media gateway attempting to allocate the resource to another relay line of the plurality of relay lines using another SSP among the plurality of SSPs; Resource allocation method of the relay line for call processing comprising a. The method of claim 9, wherein the method is After step (e), (f) if the media gateway succeeds in allocating the resource to the other relay line, informing the mobile communication switching center server that the resource gateway has succeeded in allocating the resource; And (g) the mobile communication switching center server relaying the call using the other relay line; Resource allocation method for a relay line for call processing, characterized in that it further comprises. The method of claim 9, wherein the method is After step (e), (h) if the media gateway fails to allocate the resource to the other relay line, notifying the mobile communication switching center server that the resource gateway has failed to allocate the resource; And (i) the mobile telecommunication switching center server treating the call as a failure; Resource allocation method for a relay line for call processing, characterized in that it further comprises.

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