JP2011228850A - Release management method and release management device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress degradation in the ability to process in release management when a function is added.SOLUTION: If a function required for management is added to a calling processing server 1 as a result of changing an amount of the bandwidth of a media bandwidth, a function start time at which the added function is started is recorded. The amount of bandwidth for use is altered to the amount of bandwidth after the function start time. A call occurrence time relating to the media bandwidth is compared with the function start time. If there is included the media bandwidth that has already had a predetermined amount of bandwidth before the amount of bandwidth for use was altered after the function start time, the amount of difference bandwidth between the amount of bandwidth after the function start time relating to the media bandwidth and the amount of bandwidth before the function start time is subtracted from the altered bandwidth for use.

Description

  The present invention relates to a technique for managing a virtual path between nodes as a resource.

  FIG. 10 is a diagram schematically showing a system configuration of a SIP communication network that performs call processing control using SIP. The SIP communication network includes a plurality of end terminals 5 used by network subscribers (hereinafter referred to as users), and a plurality of call processing servers 1 that control call processing such as a call connection request transmitted from the end terminals 5. In accordance with an instruction from the call processing server 1, a media gateway (MG: Media Gateway) 3 that links terminations inside and outside the transfer network, and the end terminal 5, the call processing server 1, and the media gateway 3 can communicate with each other physically. It consists of various network devices 7 such as a router, a switch, a PON (Passive Optical Network), a home gateway (HGW), and the like that are connected to each other.

  When a call is made to a desired partner, a request signal (SIP signal using SIP, the same applies hereinafter) required for establishing a call connection such as INVITE from the end terminal 5 to the partner end terminal (not shown). ) And the result of the SIP negotiation performed with the other end terminal is OK, a session is established between the two end terminals and a call becomes possible.

  Specifically, a request signal from the end terminal 5a is transmitted to the call processing server 1, and the call processing server 1 that has received the request signal receives another call processing server 1a that is adjacently connected or a call processing server ahead thereof. A call connection based on the request signal is requested to the other end terminal via the server 1b. Then, SIP negotiation is performed between end terminals (specifically, between call processing servers, between call processing servers and end terminals, etc.), and based on the result, for media communication such as voice communication and video communication. Session information is determined, a media session is established, and media communication becomes possible. In FIG. 10, a physical connection state between apparatuses or devices, a communication path through which SIP packets and media traffic actually flow are indicated by solid lines, and a logical flow of SIP signals is indicated by broken lines.

  Here, the configuration of the call processing server 1 will be described. As described above, the call processing server 1 includes a call processing function unit (CSCF: Call Session Control Function) 11 that controls call processing such as a call connection request transmitted from the end terminal 5, and devices or devices in the SIP communication network. A resource management device (RACS: Resource and Admission Control) that manages resources of communication paths between the nodes (specifically, links or paths between nodes such as between a media gateway and a router or between a router and a switch) Subsystem) 12.

  The resource management device 12 is composed of various function units, and in particular, composed of a resource management function unit (A-RACF: Resource and Admission Control Function) and a policy setting function unit (SPDF: Service Policy Decision Function). The function unit thus controlled is called a media gateway controller (MGC) 121 because it controls the media gateway 3 based on a request from the call processing function unit 11.

  The media gateway controller 121 stores and manages the use bandwidth, the upper limit bandwidth, and the like of the communication path classified according to the priority and quality in a storage unit such as a memory in advance as virtual resources and virtual paths. Then, when a new communication path establishment request is transmitted from the call processing function unit 11 based on a new call processing request from the end terminal 5, SDP (Session Description Protocol) information determined at the time of the above SIP negotiation Whether or not the requested media bandwidth exceeds the upper limit bandwidth of the virtual path by securing the media bandwidth according to some or all of the media information and adding or subtracting (adding or subtracting) the current bandwidth Acceptance determination (for example, determination of whether or not one or more media traffic established by SIP negotiation interferes with each other and packet loss occurs when passing through the transfer network).

  As a result of the determination, if the establishment of the media session based on the new call processing request can be used within the virtual path upper limit band, a termination for connecting the end terminals to the media gateway 3 is generated, and the SIP negotiation is performed. For each result, session information including media information (each media information includes media type, requested bandwidth, and direction attribute) as shown in FIG. 10 is stored in the storage unit of the media gateway controller 121. .

  After that, the media gateway controller 121 performs pinhole control and policy control for the media gateway 3 (dashed line shown in FIG. 10). The timing for pinhole control is when a band is reserved by INI-INVITE, when a band is secured by 200 OK, when a band is released by BYE, and the megaco protocol is used for such control (megaco control). When receiving a bandwidth reservation request, securing request, or change request, each request and the media information in the request are recorded. On the other hand, when a bandwidth deletion request is received, the received request information and each media information are deleted from the memory or the like.

  In the policy control, the calling user type, the called user type, the priority in the SDP information and the priority of the subscriber information are identified, and when the SIP communication network is congested, the call priority is identified and the packet is identified. Communication is regulated.

  As described above, the media gateway controller 121 controls packets flowing into and out of the SIP communication network. Such a conventional media gateway controller is disclosed in Patent Document 1.

  The SDP information includes information such as a required bandwidth and a transfer quality class required for various media communications. Bandwidth accumulation or underloading refers to the time at which a call is started for one or more corresponding virtual paths after specifying the path between end terminals from all virtual paths managed by the resource management function unit. Means adding the requested bandwidth and subtracting the added bandwidth at the end of the call. Also, the pinhole control is a control for actually opening / disconnecting a port and setting a number for communicating with the media gateway 3 between end terminals or between the end terminal and the call processing server 1. Means.

  On the other hand, the media gateway 3 generates a termination according to an instruction from the media gateway controller 121, and sets a port necessary for communication between end terminals based on the policy setting. The session information and termination information secured in the media gateway 3 are consistent with the information of the media gateway controller 121. The media gateway 3 is generally composed of functional units called C-BGF (Core Border Gateway Function), I-BGF (Interconnection Border Gateway Function), and RCEF (Resource Control Enforcement Function).

  As described above, various media whose bandwidth is secured by the media gateway controller 121 and whose physical communication path is secured by the media gateway 3 can be communicated within each media bandwidth of the virtual path, as shown in FIG.

  Here, a new function that needs to be managed by changing the media bandwidth to a predetermined bandwidth may be added to the call processing server 1 described above. The processing of the conventional resource management apparatus 12 including the media gateway controller 121 when a new function with such a change in the media bandwidth is added will be described.

  FIG. 12 is a diagram showing a conventional processing flow when a new media band is reserved or reserved. The resource management device 12 receives a reservation request or reservation request for a new media band, and temporarily stores the received information as session information in the storage means (S71, S72).

  Next, in order to use the new media bandwidth for later release processing, the on / off frame of the after-function addition flag is set to the session information so that it is possible to grasp that the new media bandwidth reservation request or reservation request has been made after the function addition. And the post-function addition flag is set to ON for the new media band (S73).

  Next, the total bandwidth amount of each media band after the change to the predetermined bandwidth amount is calculated as the bandwidth amount of the used bandwidth after the function addition (S74).

  Next, it is determined whether or not the new media band can be allowed for the remaining band that is the difference between the upper limit band of the virtual path and the used band (S75). Each media band may individually hold a determination threshold value, and in this case, each determination is performed.

  If it is determined from the determination result in S75 that reception is possible, the bandwidth usage is updated by adding the bandwidth amount of the new media bandwidth to the usage bandwidth (S76).

  Next, pinhole control and policy control are performed for the media gateway 3 (S77), and if both controls are successful, a reservation request success response or a secure request success response is transmitted to the call processing function unit 11 of the request source. (S78, S79).

  On the other hand, when it is determined that the acceptance is not possible based on the determination result of S75, or when the pinhole control and the policy control have failed, a reservation request failure response or a securing request failure response is transmitted to the call processing function unit 11 of the request source. (S80) The use band is rolled back to the state before the addition in S76 (S81).

  FIG. 13 is a diagram showing a conventional processing flow when releasing or changing an existing media band. The resource management device 12 receives a request for releasing or changing an existing media band, and determines whether or not the post-function addition flag related to the target existing media band is on (S91, S92).

  When the after function addition flag is ON, the bandwidth of each media band in the media information is used to calculate the bandwidth of the used band after adding the function, and the media band for deleting the existing media band to be released, etc. The use band is updated by performing addition / subtraction (S93, S94).

  On the other hand, when the post-function addition flag is off, the media bandwidth is calculated by using the bandwidth of each media bandwidth in the media information, and the existing media bandwidth to be released is deleted, etc. The used band is updated by adding / subtracting the band (S95, S96).

JP 2003-258855 A

  However, when a new media bandwidth reservation request or reservation request is set, a flag is set, and when an existing media bandwidth release request or change request is requested, the flag is determined to be on / off. There was a problem that the processing capacity of the apparatus was lowered.

  In addition, since it is necessary to change the type of flag and the number of determinations as functions are added (or changed) to the call processing server, processing related to each request such as a reservation request becomes complicated, and implementation becomes complicated. There was a problem.

  The present invention has been made in view of the above, and an object of the present invention is to suppress a reduction in processing capability of resource management when a function is added.

  The resource management method according to claim 1 comprises a transfer network that transfers media determined as a result of SIP negotiation, and is a call processing server that controls calls transferred by a media gateway arranged in the transfer network. The operating resource management device stores and manages the total bandwidth of each media band used for each media communication on the virtual path in the storage means as a used bandwidth, and the bandwidth amount of the media band is predetermined. When a function required to be managed by changing the bandwidth is added to the call processing server, a step of recording a function start time when the function is started, and reading the used bandwidth from the storage means, Changing the bandwidth amount of the used bandwidth so as to correspond to the entire change of the bandwidth to the predetermined bandwidth amount; The media bandwidth that has already had the predetermined bandwidth amount after the function start time and before the bandwidth amount of the used bandwidth is changed by comparing the call occurrence time and the function start time according to each media bandwidth Is included in the used bandwidth, the difference bandwidth amount between the bandwidth amount after the function start time related to the media bandwidth and the bandwidth amount before the function start time is subtracted from the bandwidth amount of the changed used bandwidth. And a step of performing.

  According to the present invention, a resource management apparatus includes a transfer network that transfers media determined as a result of SIP negotiation, and that operates on a call processing server that controls calls transferred by a media gateway provided in the transfer network. The total bandwidth of each media band used for each media communication on the virtual path is stored and managed in the storage means as the used bandwidth, and management is required by changing the media bandwidth to a predetermined bandwidth. When a function is added to the call processing server, the function start time at which the function is started is recorded, the used band is read from the storage means, and the entire change to the predetermined band amount of each media band is handled. Thus, the amount of bandwidth used is changed, and the call occurrence time and function start time for each media band are compared. If a media band that already had a predetermined bandwidth before changing the bandwidth used is included in the bandwidth used, the bandwidth after the function start time and the function start time related to the media bandwidth Since the difference bandwidth amount with respect to the previous bandwidth amount is subtracted from the bandwidth amount of the used bandwidth after the change, it is possible to suppress a decrease in processing capability of resource management when adding a function.

  The resource management method according to claim 2 uses the bandwidth amount of each media band in the resource management method according to claim 1 when a reservation request or reservation request for a new media band is made after the function start time. The used bandwidth is calculated, and it is determined whether or not the new media bandwidth can be allowed for a remaining bandwidth that is a difference between the upper limit bandwidth of the virtual path and the used bandwidth. The media gateway is controlled so as to allow the inflow / outflow of calls related to the new media by adding the bandwidth amount to the used bandwidth.

  The resource management method according to claim 3 is the resource management method according to claim 1 or 2, wherein when there is a request to release an existing media bandwidth or a bandwidth change request after the function start time, the bandwidth of each media bandwidth The use band is calculated using the amount, and the band amount of the existing media band is subtracted from the use band.

  The resource management apparatus according to claim 4 is a call processing server that includes a transfer network that transfers media determined as a result of SIP negotiation, and that controls a call transferred by a media gateway provided in the transfer network. In the operating resource management device, the resource management means for storing and managing the total bandwidth of each media band used for each media communication on the virtual path as the used bandwidth in the storage means, and the bandwidth of the media bandwidth Function start time recording means for recording a function start time at which the function is started when a function required to be managed by changing to a predetermined bandwidth amount is added to the call processing server; Read from, and the bandwidth of the used bandwidth so as to correspond to the whole change of the media bandwidth to the predetermined bandwidth amount The bandwidth adjustment means for changing the call generation time and the function start time for each media band, and after the function start time and before the bandwidth amount of the bandwidth used is changed When the media band that had the band amount is included in the use band, the difference band amount between the band amount after the function start time and the band amount before the function start time related to the media band is changed. Use band readjustment means for subtracting from the band amount of the later use band.

  According to the present invention, a resource management apparatus includes a transfer network that transfers media determined as a result of SIP negotiation, and that operates on a call processing server that controls calls transferred by a media gateway provided in the transfer network. The total bandwidth of each media band used for each media communication on the virtual path is stored and managed in the storage means as the used bandwidth, and management is required by changing the media bandwidth to a predetermined bandwidth. When a function is added to the call processing server, the function start time at which the function is started is recorded, the used band is read from the storage means, and the entire change to the predetermined band amount of each media band is handled. Thus, the amount of bandwidth used is changed, and the call occurrence time and function start time for each media band are compared. If a media band that already had a predetermined bandwidth before changing the bandwidth used is included in the bandwidth used, the bandwidth after the function start time and the function start time related to the media bandwidth Since the difference bandwidth amount with respect to the previous bandwidth amount is subtracted from the bandwidth amount of the used bandwidth after the change, it is possible to suppress a decrease in processing capability of resource management when adding a function.

  The resource management device according to claim 5 uses the bandwidth amount of each media band in the resource management device according to claim 4 when a reservation request or a reservation request for a new media bandwidth is made after the function start time. The used bandwidth is calculated, and it is determined whether or not the new media bandwidth can be allowed for a remaining bandwidth that is a difference between the upper limit bandwidth of the virtual path and the used bandwidth. The media gateway is controlled so as to allow the inflow / outflow of calls related to the new media by adding the bandwidth amount to the used bandwidth.

  The resource management device according to claim 6 is the resource management device according to claim 4 or 5, wherein when there is a request for releasing an existing media bandwidth or a bandwidth change request after the function start time, the bandwidth of each media bandwidth The use band is calculated using the amount, and the band amount of the existing media band is subtracted from the use band.

  ADVANTAGE OF THE INVENTION According to this invention, the processing capability fall of the resource management at the time of a function addition can be suppressed.

It is a figure which shows the functional block structure of a resource management apparatus. It is a figure explaining the upper limit band and use band of a virtual path managed by a resource management unit. It is a figure which shows the processing flow until it adjusts or re-adjusts a use zone | band. It is a figure which shows the processing flow when there exists a reservation request or reservation request | requirement of a new media band. It is a figure which shows the processing flow when there exists an open request | requirement or change request | requirement of the existing media band. FIG. 6 is a diagram illustrating media band adjustment / readjustment according to the first exemplary embodiment. FIG. 10 is a diagram illustrating media band adjustment / readjustment according to the second embodiment. FIG. 10 is a diagram illustrating media band adjustment / readjustment according to the third embodiment. It is a figure explaining the example of application of a resource management apparatus. It is a figure which shows roughly the system configuration | structure of the SIP communication network which performs the call processing control using SIP. It is a figure explaining the relationship between a media band and a virtual path. It is a figure which shows the conventional process flow in the case of reserving or securing a new media band. It is a figure which shows the conventional process flow in the case of releasing or changing the existing media band.

  Hereinafter, an embodiment will be described with reference to the drawings.

  First, the function of the resource management apparatus according to this embodiment will be described. FIG. 1 is a diagram illustrating a functional block configuration of the resource management apparatus. The resource management device 12 includes a resource management unit 12a, a function start time recording unit 12b, a used band adjusting unit 12c, a used band readjusting unit 12d, a used band calculating unit 12e, and an MG control unit 12f. Has been. Hereinafter, after describing each of these functional units in detail and explaining the processing flow, the effects of the resource management apparatus according to the present embodiment will be described.

  As shown in FIG. 10, the resource management device 12 is provided in a SIP communication network (transfer network) that transfers media determined as a result of SIP negotiation, and is a media gateway provided in the SIP communication network. 3 operates on the call processing server 1 that controls the call transferred at step 3. Accordingly, it is needless to say that the resource management device 12 can be operated as one function of the call processing server 1 and the function of the media gateway controller as described in the background art can be processed.

  The resource management unit 12a uses each link between nodes on the path constituting the SIP communication network and the processing capability of each node as a virtual path, and each media band and each media bandwidth used for each media communication on the virtual path It has a function of storing and managing the bandwidth amount, the currently used bandwidth, which is the total bandwidth amount of each media bandwidth, and the upper limit bandwidth of the virtual path in a storage means such as a memory.

  Specifically, as shown in FIG. 2, a plurality of nodes (PON, L2SW, MG, etc.) having a larger capacity are arranged in the communication path from the end terminal 5 to the media gateway 3 toward the core network. Therefore, a virtual identifier (access line virtual path # 1, access line virtual path # 2, PON virtual path # 1, etc.) is assigned to each virtual path between nodes, and the upper limit bandwidth and the used bandwidth are SIP communication for each virtual identifier. It is managed as network resource information.

  The function start time recording unit 12b starts the added function in the call processing server 1 when a function that requires management is added to the call processing server 1 by changing the media bandwidth to a predetermined bandwidth. It has a function to record the function start time.

  For example, a case where a function program for multiplying the media band by a correction coefficient when the media band determined by SIP negotiation needs to be managed by 1.2 times is added. In addition, there are a function program that corrects the media band to the effective band value, a function program that corrects the set granularity, and a function program that corrects the media band in consideration of the traffic characteristics of each medium. Any function may be used as long as it is a function that requires management by changing the bandwidth amount to a predetermined bandwidth amount.

  The used band adjusting unit 12c has a function of reading the used band amount from the storage means stored and managed by the resource managing unit 12a and changing the used band amount to the band amount after the function start time. is doing. Specifically, the bandwidth amount of the used band is changed so as to correspond to the entire change in the media bandwidth to the predetermined bandwidth amount. For example, when a function that requires management is added by changing the bandwidth amount of each media band to a predetermined multiple, the used bandwidth that is stored and managed is similarly multiplied by a predetermined amount.

  The used band readjustment unit 12d compares the call occurrence time of each media band with the function start time recorded by the function start time recording unit 12b, respectively, and after the function start time and the use band adjustment unit 12c. If the media bandwidth that already had the bandwidth after the change is included in the bandwidth to be used before the bandwidth bandwidth is changed, the bandwidth after the function start time related to the media bandwidth It has a function to readjust the used bandwidth after adjustment that has been changed and adjusted by the used bandwidth adjustment unit 12c by subtracting the difference bandwidth amount from the bandwidth amount before the function start time from the changed bandwidth amount. ing. That is, when the media band that had the changed band amount is already included in the use band, the use band adjustment unit 12c further multiplies it by a predetermined amount. The bandwidth used is optimized by subtracting the minutes.

  The use band calculation unit 12e adjusts (readjusts) the use band stored and managed in the storage unit by the resource management unit 12a, the function start time recording unit 12b, the use band adjustment unit 12c, and the use band readjustment unit 12d. When a new media bandwidth reservation request or reservation request, an existing media bandwidth release request, or a bandwidth change request is received, the bandwidth used is calculated using the bandwidth amount of each media bandwidth. It has a function to perform processing according to the request. Detailed functions will be described in the processing flow.

  The MG control unit 12f has a function of controlling the media gateway 3 so that a call relating to a new medium can be flowed in / out when a new media band reservation request or reservation request is made.

  Next, the processing flow of the resource management device 12 will be described. FIG. 3 is a diagram illustrating a processing flow until the use band is adjusted or readjusted.

  First, when the function described above is added to the call processing server 1 and started, the function start time recording unit 12b records the function start time (S1).

  Next, the used bandwidth adjustment unit 12c changes the bandwidth amount of the used bandwidth stored and managed to the bandwidth amount after the function start time for each virtual path (S2). At this time, the requested bandwidth stored for each medium is not changed.

  The predetermined band amount does not need to be a constant size for all or some of the media bands, and may be different for each media band. For example, in the case where a service with a uniform media bandwidth is provided, and a function for providing a service that requires a uniform change of the media bandwidth is added, a plurality of media bandwidths are added. Group processing may be performed as one bundle (for example, when only a 64 kbps phone is used, media bandwidth × number of media × 1.2 times is used to adjust the usage bandwidth). On the other hand, when the media types are different, the media bandwidth may be calculated individually and then added to adjust the bandwidth used.

  Next, the use band readjustment unit 12d compares the call occurrence time of each media band with the function start time recorded by the function start time recording unit 12b (S3).

  As a result of the comparison in S3, when a media band that has been after the function start time and has already been changed from before the change of the bandwidth is included, the used bandwidth readjustment unit 12d For each virtual path, the difference bandwidth between the bandwidth after the function start time and the bandwidth before the function start time is calculated for the media, and the difference bandwidth is subtracted from the used bandwidth changed in S2 (S4). ).

  On the other hand, as a result of the comparison in S3, if the media band that has been after the function start time and has already changed the bandwidth before the change in bandwidth is not included, readjust the used bandwidth There is no need to do so, so the flow is terminated.

  Next, a processing flow when each request is received after adjusting the use band or after readjustment will be described. FIG. 4 is a diagram showing a processing flow when there is a reservation request or reservation request for a new media band.

  First, the use band calculation unit 12e receives a reservation request or reservation request for a new media band, and the received information is temporarily added and stored in the storage unit stored and managed by the resource management unit 12a (S11). , S12).

  Next, the used band calculation unit 12e calculates the used band for each virtual path using the band amount of each media band (S13).

  Next, whether or not the bandwidth usage of the new media band can be allowed for the remaining bandwidth, which is the difference between the upper limit bandwidth of the virtual path and the bandwidth used of the virtual path calculated in S13, for each virtual path by the used bandwidth calculation unit 12e. It is determined (whether it can be accommodated) (S14).

  If the result of determination in S14 is that it is permissible (accommodable), the bandwidth calculation unit 12e adds the amount of new media bandwidth to the bandwidth used (S15).

  Next, pinhole control and policy control are performed on the media gateway 3 by the MG control unit 12f so as to permit the inflow and outflow of calls related to the new media (S16).

  Next, the MG control unit 12f confirms whether each control in S16 has succeeded or failed (S17).

  As a result of the confirmation in S17, when each control in S16 is successful, a reservation request success response or a reservation request success response is transmitted to the call processing function unit 11 of the request source (S18).

  On the other hand, if the result of determination in S14 is unacceptable (cannot be accommodated), or if each control in S16 is successful as a result of confirmation in S17, a reservation request failure response or a reservation request failure response is returned as the request source. Is transmitted to the call processing function unit 11 (S19), and the used band is rolled back to the state before the addition in S15 (S20).

  FIG. 5 is a diagram showing a processing flow when there is a request to release or change an existing media band.

  First, the use band calculation unit 12e accepts a request to release or change an existing media band (S31).

  Next, the used bandwidth calculation unit 12e calculates the used bandwidth for each virtual path using the bandwidth amount of each media bandwidth (S32).

  Next, the used bandwidth calculation unit 12e subtracts the bandwidth amount of the existing media bandwidth to be released from the used bandwidth calculated in S32 for each virtual path (S33).

  As described above, according to the present embodiment, when a function that needs to be managed is added to the call processing server 1 by changing the media bandwidth to a predetermined bandwidth, the additional function is started. Record the time, change the amount of bandwidth used to the amount of bandwidth after the function start time, compare the call start time and function start time related to the media bandwidth, and after the function start time and before the change When a media band that already has a predetermined bandwidth is included, the difference bandwidth between the bandwidth after the function start time and the bandwidth before the function start time related to the media bandwidth is changed. Since the function is subtracted from the used bandwidth, the time when a function (for example, a function for multiplying the media bandwidth by 1.2) is added to the call processing server 1 or the function is changed (for example, the media bandwidth multiplied by 1.2 is set to 1). Each virtual path at the time It becomes possible to previously adjust or readjust the band use.

  In addition, since each process such as a reservation request is performed using a band that has already been adjusted or readjusted, determination before and after the addition of a function becomes unnecessary when a reservation request is received, and the resource management device at the time of adding the function It is possible to suppress a decrease in processing capacity.

  In other words, even when functions are added continuously, or even when the amount of media bandwidth is continuously changed under predetermined conditions, it is possible to easily maintain each processing related to bandwidth reservation requests, etc. Thus, it is possible to provide a high-quality resource management device. In addition, even after the function is added, it is possible to provide the user with the same amount of media bandwidth under the same conditions. Therefore, it is possible to increase the success probability of media communication. Furthermore, since it is possible to change all the used bandwidths up to the bandwidth after the addition of the function in advance, the new acceptance is suppressed compared to the conventional technology that recalculates changing the media bandwidth at the time of accepting each request. The shortage can be suppressed. Moreover, the effect of improving the normal call processing capability in the call processing server 1 can also be obtained.

  A case will be described in which the bandwidth correction coefficient for all media is changed to 1.2 times and a function requiring management is added. FIG. 6 is a diagram illustrating media band adjustment / readjustment according to the first embodiment. The upper row shows the required bandwidth for each medium, and the bandwidth amount of the required bandwidth is not changed as described in S2. On the other hand, the lower level is a used band on the virtual path, and a value obtained by merging the band amounts of each media band is managed as the used band.

  If a function is added and started during the transition from the time point A to the time point B, and the media # 4 is added at the time point B, the media # 4 is already managed as 1.2 times the bandwidth at the time point B. ing. Here, it is assumed that the resource management unit 12a manages the bandwidth used at the time point B.

  At time point C, the used bandwidth adjustment unit 12c multiplies the current bandwidth amount (merge value of media # 1 to # 4 at time point B) by a factor of 1.2 with the addition of the function. Adjust the bandwidth. As a result, after the new service is started after the function is added, all user terminals can use the band after the function is added. By adjusting the used band to the band after the addition of the function, it is possible to prevent the remaining band (the difference between the upper limit band of the virtual path and the used band) from being consumed by a request for adding a new medium.

  However, since media # 4 is multiplied by extra (1.2 times × 1.2 times), the used band readjustment unit 12d subtracts the extra band amount at time point D. As a result, the remaining bandwidth of the virtual path is further optimized.

  Thereafter, when a request to release the existing media # 3 is received at the time point E, only the bandwidth of the corresponding existing media # 3 is deleted. The determination logic before and after the function addition at the time when the release request is received as in the conventional case becomes unnecessary.

  Next, a case will be described in which a function necessary for management is added by changing the bandwidth correction coefficient to 3 times for media having an upstream bandwidth and a media type of only data. FIG. 7 is a diagram illustrating media band adjustment / readjustment according to the second embodiment. The upper row shows the required bandwidth for each medium, and the bandwidth amount of the required bandwidth is not changed as described in S2. On the other hand, the lower level is a used band on the virtual path, and a value obtained by merging the band amounts of each media band is managed as the used band.

  When the function is started during the transition from the time point A to the time point B and the media # 4 is added at the time point B, the media # 4 is already managed as a triple amount of bandwidth at the time point B. . Here, it is assumed that the resource management unit 12a manages the bandwidth used at the time point B.

  At the time point C, the used bandwidth adjustment unit 12c adds 3 to the current bandwidth amount (the merged value of the media # 1 to # 4 at the time point B excluding the audio media bandwidth # 0) with the addition of the above function. The bandwidth used is adjusted by multiplying twice. As a result, after the new service is started after the function is added, all user terminals can use the band after the function is added. By adjusting the used band to the band after the addition of the function, it is possible to prevent the remaining band (the difference between the upper limit band of the virtual path and the used band) from being consumed by a request for adding a new medium.

  However, since media # 4 is multiplied by an extra number (3 times × 3 times), the used band readjustment unit 12d subtracts the extra band amount at time point D. As a result, the remaining bandwidth of the virtual path is further optimized.

  Thereafter, when a request to release the existing media # 3 is received at the time point E, only the bandwidth of the corresponding existing media # 3 is deleted. The determination logic before and after the function addition at the time when the release request is received as in the conventional case becomes unnecessary.

  In other words, the resource management device 12 can adjust the use band by changing the media band based on the media type, the virtual path type, and the bandwidth up or down.

  The media band # 4 is changed to 1.2 times or 3 times when shifting from the time point B described in the first embodiment or the second embodiment to the time point C. However, in this case, the media bandwidth # 4 may exceed the upper limit bandwidth of the virtual path. is there. In the transition from the time point C to the time point D, the band amount of the media # 4 is readjusted, and as a result, the upper limit band may not be exceeded. However, in order to avoid the separation from the actual use as much as possible, this example 3 The used bandwidth adjustment unit 12c performs pre-blocking processing (pre-blocking function). FIG. 8 is a diagram illustrating media band adjustment / readjustment according to the third embodiment.

  In other words, when the used bandwidth multiplied by the function addition exceeds the upper limit bandwidth of the virtual path, the used bandwidth adjustment unit 12c suppresses additional use of new media until the used bandwidth falls below the upper limit bandwidth. In the example illustrated in FIG. 8, the use band (the merged value of media # 1 to medium # 4) exceeds the upper limit band of virtual path # 2, and therefore, addition of medium # 5 is rejected at time point C. When media # 4 is deleted at time D, media # 6 that can be allowed within the upper limit band of virtual path # 2 can be added as in time E.

  Next, an example of a model case in which the resource management device 12 described so far is used will be described. FIG. 9 is a diagram illustrating an application example of the resource management apparatus.

  Usually, the call processing server 1 is composed of an active system (ACT system: 0 system) and a standby system (STB system: 1 system) assuming that the server is down, and functions are added to the call processing server 1. Before being used, the old file is used for both the active system and the standby system (S51a, S51b).

  The file referred to here is a file in which data such as the used bandwidth and the upper limit bandwidth for each virtual path stored and managed in the storage means by the resource management unit 12a is filed. The old file is before the addition of a function. It means to work with the program. Also, the new file described later means that it operates with the program after the function is added.

  Thereafter, when a function added to the call processing server 1 is started, the standby system is once converted to OUS (Out Of Service), the database as a storage means is converted, and the old file of the standby system is then replaced with the new file. The call is returned to the STB state and the standby system is replaced with the new file, and the call received in the active system is converted between the systems by synchronizing the memory (S52a, S52b, S53, S54a, S54b, S55). The reason for memory conversion is that the actual bandwidth used is managed on the memory for each virtual path.

  Thereafter, the standby system is changed to the ACT state and operation is started using the new file (S56a, S56b).

DESCRIPTION OF SYMBOLS 1 ... Call processing server 11 ... Call processing function part 12 ... Resource management apparatus 12a ... Resource management part 12b ... Function start time recording part 12c ... Use band adjustment part 12d ... Use band readjustment part 12e ... Use band calculation part 3 ... Media Gateway 5 ... End terminal 7 ... Network equipment S1-S4 ... Step S11-S20 ... Step S31-S33 ... Step S51-S56 ... Step S71-S81 ... Step S91-S96 ... Step

Claims (6)

A resource management device comprising a transfer network for transferring media determined as a result of SIP negotiation, and operating on a call processing server for controlling a call transferred by a media gateway arranged in the transfer network,
Storing and managing the total bandwidth of each media band used for each media communication on the virtual path in the storage means as a used band; and
Recording a function start time at which the function was started when a function required to be managed by changing the bandwidth of the media band to a predetermined bandwidth is added to the call processing server;
Reading the used band from the storage means, and changing the band amount of the used band so as to correspond to the entire change of the media band to the predetermined band amount;
The media bandwidth that has already had the predetermined bandwidth amount after the function start time and before the bandwidth amount of the used bandwidth is changed by comparing the call occurrence time and the function start time according to each media bandwidth Is included in the used bandwidth, the difference bandwidth amount between the bandwidth amount after the function start time related to the media bandwidth and the bandwidth amount before the function start time is subtracted from the bandwidth amount of the changed used bandwidth. And steps to
A resource management method comprising:   When there is a reservation request or a reservation request for a new media band after the function start time, the use band is calculated using the bandwidth amount of each media band, and the difference between the upper limit band of the virtual path and the use band It is determined whether or not the new media bandwidth can be allowed for a certain remaining bandwidth, and if it is acceptable, the bandwidth amount of the new media bandwidth is added to the used bandwidth, and the inflow / outflow of calls related to the new media is permitted. The resource management method according to claim 1, wherein the media gateway is controlled as described above.   When there is a request to release or change the bandwidth of an existing media band after the function start time, the bandwidth usage of each media bandwidth is calculated and the bandwidth bandwidth of the existing media bandwidth is subtracted from the bandwidth usage. The resource management method according to claim 1 or 2, wherein: In a resource management device comprising a transfer network for transferring media determined as a result of SIP negotiation and operating on a call processing server for controlling calls transferred by a media gateway arranged in the transfer network,
Resource management means for storing and managing a total bandwidth amount of each media band used for each media communication on the virtual path as a used bandwidth in a storage means;
A function start time recording means for recording a function start time at which the function was started when a function required to be managed by changing the bandwidth of the media band to a predetermined bandwidth is added to the call processing server;
Use band adjustment means for reading the use band from the storage means, and changing the band amount of the use band so as to correspond to the whole change of the media band to the predetermined band amount;
The media bandwidth that has already had the predetermined bandwidth amount after the function start time and before the bandwidth amount of the used bandwidth is changed by comparing the call occurrence time and the function start time according to each media bandwidth Is included in the used bandwidth, the difference bandwidth amount between the bandwidth amount after the function start time related to the media bandwidth and the bandwidth amount before the function start time is subtracted from the bandwidth amount of the changed used bandwidth. Use band readjustment means,
A resource management device comprising:   When there is a reservation request or a reservation request for a new media band after the function start time, the use band is calculated using the bandwidth amount of each media band, and the difference between the upper limit band of the virtual path and the use band It is determined whether or not the new media bandwidth can be allowed for a certain remaining bandwidth, and if it is acceptable, the bandwidth amount of the new media bandwidth is added to the used bandwidth, and the inflow / outflow of calls related to the new media is permitted. The resource management apparatus according to claim 4, wherein the media gateway is controlled as described above.   When there is a request to release or change the bandwidth of an existing media band after the function start time, the bandwidth usage of each media bandwidth is calculated and the bandwidth bandwidth of the existing media bandwidth is subtracted from the bandwidth usage. 6. The resource management apparatus according to claim 4 or 5, wherein

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