JP2007312159A - System, method and program for controlling ip communication - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system, method and program for controlling IP communication, wherein priority connection control of important communication is made and a telephone call is surely performed even when communication falls into a congestion state. <P>SOLUTION: The system for controlling IP communication has: a class identification processing part 32 by every class which identifies importance of communication itself by every call based on identification information by every user and communication destination information to determine priority according to the importance; a call acceptance control processing part 33 which classifies calls into discard processing, partial acceptance and the whole acceptance of the calls by every call according to the priority of calls based on congestion restriction information to execute flow rate restriction of the calls; and an IP packet transmission/reception processing part 34 which sets each processing such as port distribution, VLAN, Diffserv to the partial acceptance, the whole acceptance of the classified calls, executes IP packet transmission/reception processing for distributing IP packets to a path which reserves band in an IP communication network to the call with high priority, sets each processing to a transfer system when the communication falls into the congestion state and executes routing processing of priority control and band guarantee to a session with high priority. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an IP (Internet Protocol) communication system, a control method, and a control program, and more particularly, to an IP communication control system, a control method, and a control program using call-by-call class identification of IP telephone calls and congestion restriction information.

Currently, an IP communication control system using an IP communication network is known in an IP telephone network for establishing voice communication.
FIG. 1 is a configuration explanatory diagram of a conventional general IP communication control system. As shown in FIG. 1, a general IP communication control system 1 includes a communication terminal device 2, a VoIP-GW (Voice over Internet Protocol-Gateway) 3, a router 4, and a SIP (Session Initiation Protocol) server 5. The communication terminal device 2 is connected to the IP communication network N via the VoIP-GW 3 and the router 4.

The SIP server 5 performs call control processing using the SIP protocol. The VoIP-GW 3 is a communication processing node that mutually converts voice signals and data signals from the communication terminal device 2 into IP packets and terminates a call control protocol with the SIP server 5. The router 4 is a transfer system that exchanges packets according to IP addresses, labels, and tables.
IP packets used for this communication can be broadly classified into call control packets used for the SIP protocol, voice packets converted from voice signals from communication terminal devices (telephones and the like), and other packets converted from data signals.

  In the case of a general IP communication control system 1, a call control packet a by SIP as a call control protocol performs call control between the SIP server 5 and a communication processing node (VoIP-GW 3), and a voice packet b is IP By transferring a packet between communication processing nodes through the communication network N, communication in the IP telephone network is established. In the same IP communication network N, other packets used on the Internet or the like may be transmitted and received.

In the existing IP communication control system 1, in order to establish call quality, the following technique is used.
For example, since the call control packet is used for call control and requires a reliable call connection, it is required that there is no packet loss. In addition, RTP (Real time Transport Protocol) packets are used for voice packets. For some packet loss, there is no problem because the voice packets are compensated by a PLC (Programmable Logic Controller) function or the like. If there is not, there will be a delay in the conversation, etc., so a reduction in delay time is required.

Other IP packets are generally used for data communication and the like, and a recovery procedure for a certain amount of delay and packet loss has been established.
Therefore, the current mainstream technology is to adopt a control method in which priority is given to IP packet transfer on the IP communication network N by distinguishing between call control packets, voice packets, and other packets (data, etc.) Patent Document 1).

  FIG. 2 is a schematic explanatory diagram showing an existing priority control method. As shown in FIG. 2, in the VoIP-GW 3, an IP-TOS (Type of Service) value is set, and priority control based on the IP-TOS value is performed on the IP communication network N. That is, the voice packet b, the call control packet a, and the other packet c are classified into the highest priority queue, the priority queue, and the normal queue by the TOS determination / sorting, respectively, and become the high priority queue, the priority queue, and the normal queue. The queue is output by weighted read control, and the output and high priority queue are output by complete priority read control.

The call control packet a is sent to the SIP server 5, and the voice packet b and other packets c are sent to the router 4. Since the priority order of the data packet is low, the read processing of the voice packet b is prioritized during congestion.
If network design such as bandwidth is performed in consideration of traffic in the IP communication network N by the above-described implementation method, call quality, connection quality, and the like can be realized in normal traffic.
NTT Technical Journal, Volume 13 (2001), No. 3, pages 79-84

However, in order to realize a service similar to an existing telephone in a congested state in the IP communication network N, it is necessary to be able to make a reliable call for an important call (such as an emergency call or an important user call). It is difficult to realize with current technology.
For example, if sufficient bandwidth design is not performed, congestion may occur and important communication may not be ensured. In addition, if it is assumed that sufficient bandwidth design is performed, it is possible to guarantee important communication including general communication, but by adopting a control method that gives priority to IP packet transfer on the IP communication network N, It is necessary to improve the performance for performing priority control processing for a wide variety of traffic and to be implemented in all transfer systems, which is difficult to realize in terms of cost.

The current problems are described in detail below.
1) In the current IP communication control system, there is no means for determining the call type (call importance level) and preferentially processing important communication. For example, if a large number of call control packets and voice packets become congested due to simultaneous incoming / outgoing calls during a disaster or planned calls, packet loss or delay may occur unless sufficient bandwidth is secured. Even in a simple call, there is a possibility that a phenomenon such as a connection failure or a call failure may occur.
2) In a telephone service using an IP communication network, as the traffic load such as simultaneous incoming and outgoing calls within a communication processing node increases, voice delay, packet loss, etc. occur regardless of general communication or important communication. There is a risk of degrading the call quality.

3) Since various types of IP packet communication are assumed using various types of applications in the IP communication network, it is necessary to assume various and complicated traffic characteristics. When a large amount of various types of traffic occurs, adopting a control method that gives priority to IP packet transfer, first, control other communications such as voice packets and call control packets, and use other packets for data etc. Has a lower priority. However, when a large number of call requests are generated, a large number of call control packets and voice packets are generated. Because there is no distinction between important calls and non-important calls, even if call control packets / voice packets are prioritized over data packets, congestion occurs, and packet loss occurs in call control packets / voice packets for important calls. May occur, leading to degradation of call quality.

4) In the IP communication network, when the bandwidth design of the IP communication network is carried out in consideration of the maximum traffic condition when a large amount of various kinds of traffic as described in 3) occurs in advance, the cost is reduced. It is difficult to make cheap (optimization). Also, when constructing a large-scale IP communication network, it is necessary to design an enormous amount of traffic bandwidth. If all the traffic bandwidth is secured, problems such as resource shortage may occur.
An object of the present invention is to provide an IP communication control system, a control method, and a control program that are capable of preferential connection control of important communication even in a congested state and can make a reliable call.

  In order to achieve the above object, the IP communication control system according to the present invention identifies the importance of communication itself for each call based on the identification information and communication destination information for each user in the communication processing node. A means for carrying out class identification processing for determining priority according to the degree; and within the communication processing node, call discard processing for each call according to the priority of the call subjected to class identification processing based on congestion restriction information; A means for performing call admission control processing for classifying into partial reception and all reception and restricting the call flow rate, and partial reception and total reception of calls classified by call admission control processing in the communication processing node Port allocation processing, VLAN processing, and Diffserv processing are set for IP packets to a path with reserved bandwidth in the IP communication network for high priority calls. When it is detected that the packet transmission / reception processing means and the high-priority session in the IP communication network are congested, port distribution processing, VLAN processing, and Diffserv processing are set in the transfer system. And means for performing routing processing for priority control and bandwidth guarantee.

  Also, the IP telephone call priority connection control method according to the present invention identifies the importance of the communication itself for each call based on the identification information and the communication destination information for each user in the communication processing node. Class identification processing for determining the priority according to the call, and within the communication processing node, based on the congestion restriction information and the like, according to the priority of the call that has been class identification processing, call discard processing, partial acceptance, Call admission control processing for classifying all admissions and restricting the flow rate of calls, and in the communication processing node, for part admission and partial admission classified by call admission control processing, port distribution processing and VLAN IP packet transmission / reception processing for allocating IP packets to a path in which the bandwidth in the IP communication network is reserved for a call with high priority by setting processing and Diffserv processing, and the IP communication network When it is detected that a high-priority session is in a congested state in the work, port allocation processing, VLAN processing, and Diffserv processing are set in the forwarding system, and priority control and bandwidth guarantee routing processing are performed. Processing.

  The priority connection control program for an IP telephone call according to the present invention identifies the importance of communication for each call based on identification information and communication destination information for each user in the communication processing node, and the importance Class identification processing for determining the priority according to the call, and within the communication processing node, based on the congestion restriction information and the like, according to the priority of the call that has been class identification processing, call discard processing, partial acceptance, Call admission control processing for classifying all admissions and restricting the flow rate of calls, and in the communication processing node, for part admission and partial admission classified by call admission control processing, port distribution processing and VLAN IP packet transmission / reception processing for allocating IP packets to a path in which bandwidth is reserved in the IP communication network for high priority calls by setting processing and Diffserv processing, and the IP communication When it is detected that a high-priority session is congested in the network, port allocation processing, VLAN processing, and Diffserv processing are set in the transfer system, and priority control and bandwidth guarantee routing processing are performed. Processing is executed by a computer.

According to the present invention, the class identification processing means identifies the importance of the communication itself for each call based on the identification information and the communication destination information for each user in the communication processing node, and prioritization according to the importance. In accordance with the priority of the call subjected to the class identification process based on the congestion regulation information in the communication processing node, the call discarding process for each call, the partial reception, Call reception is classified into all receptions, the flow rate restriction of the call is performed, and the IP packet transmission / reception processing is performed in the communication processing node by the means for performing the IP packet transmission / reception processing. Port distribution processing, VLAN processing, and Diffserv processing are set, and for high priority calls, IP packets can be distributed to paths that have reserved bandwidth in the IP communication network, When it is detected that a high-priority session has fallen into a congested state in the IP communication network by means of performing pre-control or bandwidth-guaranteed routing processing, port allocation processing or VLAN processing is performed in the forwarding system. And Diffserv processing are set.
For this reason, even in a congested state, priority connection control of important communication is possible and a call can be made reliably.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 3 is an explanatory diagram of the configuration of the IP communication control system according to the embodiment of the present invention. As shown in FIG. 3, the IP communication control system 10 includes a communication terminal device 20, a communication processing node (VoIP-GW) 30, a transfer system (router) 40, and a SIP server 50. The communication system is connected to the IP communication network N via the communication processing node 30 and the transfer system 40.
The communication processing node 30 includes a call identification information processing unit 31, a per-class class identification processing unit 32, a call admission control processing unit 33, an IP packet transmission / reception processing unit 34, and a congestion restriction information processing unit 35.

  The per-call class identification processing unit 32 identifies the importance of communication for each call based on the identification information and communication destination information for each user, and determines the priority order according to the importance. The call admission control processing unit 33 performs call discard processing and partial admission (for example, call density regulation) for each call according to the priority of the call subjected to class identification processing based on the congestion regulation information from the congestion regulation information processing unit 35. ) Processing and all admission processing, and call admission control processing is executed in order to perform call flow restriction (traffic control).

  The IP packet transmission / reception processing unit 34 performs port allocation processing, VLAN (Virtual Local Area Network) processing, and Diffserv for the partial call reception processing and all reception processing classified by the call reception control processing by the call reception control processing unit 33. A process by (Differentiated Service) is set, and an IP packet transmission / reception process is executed by allocating an IP packet to a path with reserved bandwidth in the IP communication network N for a call having a high priority.

  Further, when the IP packet transmission / reception processing unit 34 detects that the session with high priority is in a congested state, the IP packet transmission / reception processing unit 34 sets port allocation processing, VLAN processing, and Diffserv processing in the transfer system, and performs priority control and bandwidth guarantee. Perform the routing process. In other words, even in a congested state, the transfer system can easily perform packet transfer processing by automatically setting port allocation processing, VLAN processing, and Diffserv processing in the transfer system.

FIG. 4 is an explanatory diagram showing the configuration of the call identification information processing unit and the per-call class identification processing unit in the communication processing node of FIG. As shown in FIG. 4, for example, when using a telephone, the call identification information processing unit 31 uses a subscriber telephone number allocated for each subscriber based on the service order entered from the operation system. The priority user is classified as “top priority”, the priority user is classified as “priority”, and the general user is classified as “general”, and stored as user identification information (hereinafter referred to as accommodation subscriber information).
Further, in the case of the outgoing telephone number transmitted from the communication terminal device 20, for example, when used as a telephone, it is determined whether the telephone number belongs to an emergency call such as 110, 119, etc. “Important” and other “outgoing” calls are classified as “general” and stored as accommodated subscriber information.

The per-call class identification processing unit 32 refers to and compares the identification information held by the call identification information processing unit 31 every time a call is generated, and allocates the call to a priority class. As an example, if the calling telephone number is “important” regardless of the subscriber telephone number, the “highest priority class” is set. When the subscriber telephone number is “highest priority” and the calling telephone number is “general”, the priority class is set. When the subscriber telephone number is “priority” and the calling telephone number is “general”, it is set as “general class”. When the subscriber telephone number is “general” and the calling telephone number is “general”, it is set as “non-priority class”. The same processing is performed for the call control signal.
The congestion regulation information processing unit 35 monitors the CPU usage rate, the number of sessions, the number of resources, and the like in the self-communication processing node, and detects whether or not there is a congestion state. Further, upon receiving the congestion state notification from the upper node, the congestion restriction information is “present”.

FIG. 5 is an explanatory diagram showing the processing contents of the call admission control processing unit in FIG. 3 in a matrix display. As shown in FIG. 5, for example, when the congestion restriction information processing unit 35 determines that the congestion restriction is “none”, the call admission control processing unit 33 accepts all calls (call acceptance).
If the congestion restriction information processing unit 35 determines that the congestion restriction is “present / primary restriction”, and if the class identification for each call is “non-priority class”, call density restriction processing is performed and some calls are discarded. In the case of “general class”, “priority class”, and “highest priority class”, call acceptance processing (call acceptance) is performed.

If the congestion restriction information processing unit 35 determines that the congestion restriction is “present / secondary restriction”, and if the class identification for each call is “non-priority class”, the call is discarded and the busy tone is sent to the caller. In the case of “general class”, call density restriction processing is performed to discard some calls, and in the case of “priority class” and “highest priority class”, Perform the reception process.
If the congestion regulation information processing unit 35 determines that the congestion regulation is “present / tertiary regulation”, and if the class identification for each call is “non-priority class” or “general class”, call discard processing is performed and transmitted. A busy tone or congestion talk connection is made to the user, and in the case of "priority class", call density restriction processing is performed to discard some calls, and in the case of "highest priority class", call acceptance Perform the process.

The call processed by the call admission control processing unit 33 is transmitted / received to / from the IP packet transmission / reception processing unit 34. There are several patterns as transmission / reception methods according to the priority of IP packets.
As an example, a method of assigning ports for each priority class and transmitting / receiving IP packets (layer 1 level processing), setting a virtual path (VLAN) for each priority class, and transmitting / receiving IP packets There is a method (layer 2 level process) and a method (layer 3 level process) in which a priority (Diffserv setting) is specified in a TOS (Type of Service) field in the packet to send and receive IP packets.

  As a method of using each layer level process, for example, when there are a large number of ports that can be connected by a transfer system (router) according to the connection conditions of the IP communication network N, a layer 1 level (port distribution for each priority) process is performed. If the transfer system supports the VLAN function, the layer 2 level (VLAN for each priority) processing is performed. If all the transfer systems support the Diffserv function, the layer 3 level (Diffserv) ) Process, and IP packet transmission / reception processing (IP packet route distribution) according to priority is performed.

A specific example of layer level processing is shown below.
In the case of layer 1 level processing, packet transmission / reception processing by port allocation is performed according to the priorities of “non-priority class”, “general class”, “priority class”, and “highest priority class”. The IP packet of “the highest priority class” transmits and receives IP packets to and from a port whose bandwidth is sufficiently guaranteed. The “priority class” IP packet is transmitted / received to / from a port that reserves a certain amount of bandwidth. In the “general class” and “non-priority class”, IP packets are transmitted / received to / from a best effort type port.

In the case of layer 2 level processing, packet transmission / reception processing by VLAN allocation is performed according to the priorities of “non-priority class”, “general class”, “priority class”, and “highest priority class”. Each of the IP packets of “highest priority class”, “priority class”, “general class”, and “non-priority class” is assigned to the user_priority field in Tagheader (IEEE802.1Q) added to the Ethernet header, respectively. “Priority”, “Medium priority”, and “Low priority” are set, and IP packets are transmitted to and received from the VLAN interface.
In the case of layer 3 level processing, packet transmission / reception processing by DSCP (Differentiated Service Code Point), that is, Diffserv is performed according to the priority of “non-priority class”, “general class”, “priority class”, and “highest priority class”. To do.

  The IP packet of the “highest priority class” is set to “highest priority” in the TOS field (IPv4) and the Traffic Class field (IPv6), and transmits and receives the IP packet. The “priority class” IP packet is set to “priority” in the TOS field (IPv4) and the traffic class field (IPv6), and the IP packet is transmitted and received. The “general class” IP packet is set to “medium priority” in the TOS field (IPv4) and the traffic class field (IPv6), and the IP packet is transmitted and received. The IP packet of “non-priority class” sets “low priority” in the TOS field (IPv4) and the traffic class field (IPv6), and transmits and receives IP packets.

  As described above, IP packets whose priorities are determined according to the importance of communication are connected to the transfer system, and are transmitted and received by the communication processing node 30 through the IP communication network N. For example, in an IP packet processed at the layer 1 level, a packet having a sufficient communication bandwidth is transferred on the IP communication network N with respect to a “highest priority” IP packet having a high importance of communication. In the communication processing node 30, priority is given to important communication in accordance with the existing end-end telephone service by performing the reading process and the IP packet receiving process of the IP packet stored in the buffer according to the above-described priority. Connection control and bandwidth guarantee are possible.

  In addition, in the IP packet that has been subjected to the layer 2 level processing, the IP packet is transferred to a virtual path (VLAN) that secures a sufficient communication band on the IP communication network N with respect to the IP packet having the highest priority and the highest priority. The communication processing node 30 performs an important communication in conformity with the existing telephone service of End-End by performing a read process and an IP packet receive process of the IP packet stored in the buffer according to the above-described priority. Priority connection control and bandwidth guarantee.

  In the IP packet that has been subjected to layer 3 level processing, the highest priority “highest priority” IP packet is read and sent out with the highest priority according to the setting of Diffserv processing in the transfer system. In the node 30, priority connection control for important communication conforming to the existing end-end telephone service is performed by performing a process of reading the IP packet stored in the buffer and a process of receiving the IP packet according to the priority described above. Bandwidth guarantee is possible.

  As described above, the IP communication control system 10 according to the present invention includes a SIP server 50 that performs call control and a transfer system that performs IP packet exchange according to an IP address, label, or table in an IP telephone network for establishing voice communication. A communication processing node (VoIP gateway) that connects a system (router 40, etc.), a communication terminal device 20 and an IP communication network N, mutually converts voice / data signals into IP packets, and terminates a call control protocol with the SIP server 50 ) 30 and an IP communication network configuration.

In order to guarantee important communication according to the existing telephone service by this IP communication network configuration and to distribute load processing in the IP communication network N and to construct an economical network, the following mechanism is required.
Call processing of important communication is realized with the highest priority by a mechanism for identifying and assigning priority for each call according to the type of call (importance of communication itself).

Using the congestion information (congestion regulation information) notified from the own node or higher-level node, etc., communication with higher priority is secured preferentially, and communication with lower priority is restricted and discarded By performing traffic control such as the above, connection control can be performed with the highest priority on important communications even during congestion. In addition, by reducing the amount of traffic to be transmitted, the packet processing load in the IP communication network N is reduced, and at the same time, call processing is preferentially connected according to the importance level, so that it can be used even during resource congestion in the IP communication control system. It becomes possible to respond.
For important calls with high priority, distribution processing to the path in which the bandwidth in the IP communication network N is reserved, and IP packet transmission / reception processing are performed. Implement priority connection control and bandwidth guarantee.

There is a method for realizing the above mechanism by a transfer system or a SIP server.
When the above-described mechanism is realized in the transfer system, the call type cannot be identified without looking up to the upper layer, which causes a performance deterioration for a router or the like that requires a high transfer rate. Further, since the transfer system is used in large quantities in the IP communication network, it is very costly to provide all the transfer systems with the above-described mechanism.
When the above mechanism is realized in the SIP server, there are three main functions in the SIP server. A system that considers call congestion according to the importance of the call, in addition to the packet processing load due to call control from all communication processing nodes being concentrated on the SIP server, and taking into account the maximum traffic. It is necessary to allow sufficient processing capacity.

  As described above, when the above mechanism is realized in the communication processing node, since the call control process is performed with the SIP server, the call type can be identified based on the telephone number of the call. Compared to the transfer system, the quantity is small and the cost is superior. Like a SIP server, the load due to call processing or the like is unlikely to be concentrated, and load distribution can be achieved.

Therefore, the following means are realized by the communication processing node.
1) Class identification processing means for identifying the importance of communication for each call based on the identification information and communication destination information for each user in the communication processing node and determining the priority according to the importance.
2) Within the communication processing node, according to the priority of the call subjected to the class identification process based on the congestion regulation information, etc., it is classified into call discard processing, partial reception (for example, call density restriction), and all reception for each call, Means for executing a call admission control process to perform call flow restriction (traffic control).
3) In the communication processing node, port allocation processing, VLAN processing, and Diffserv processing are set for partial reception and all reception of calls classified by call admission control processing, and IP for high priority calls is set. A means for distributing IP packets to a path that reserves bandwidth in a communication network and executing IP packet transmission / reception processing.

4) In a high-priority session within an IP communication network, priority control and bandwidth-guaranteed routing processing can be performed by setting port settings, VLAN processing, and Diffserv processing in the transfer system even in a congested state. Means to implement.
With 1) and 2), priority connection control of important communication becomes possible, and with 3) and 4), connection of important communication is ensured even in a congested state. In addition, according to 2), 3) and 4), priority control and bandwidth guarantee routing processing are performed on the transfer system system side without much processing load, and End-End high-quality communication becomes possible.

That is, the IP communication control system 10 according to the present invention is based on the assumption that the user's communication terminal device is accommodated in the communication processing node, and call control is executed in the SIP server, and has the following characteristics.
1. Congestion control is performed in the communication processing node. 2. The communication processing node holds information on the importance for each accommodated user. 3. It is determined from the content of the call control signal from the user terminal whether or not the communication is important. 4). In the case of important communication, congestion control is performed such that the call control packet is preferentially transferred to the SIP server, the voice packet bandwidth is reserved, and the priority of the packet is set to high priority.

By having the said structure, there can exist the following effects.
1) Class identification processing for identifying the importance of communication in units of calls and giving priority based on user identification information (for example, accommodated subscriber information: subscriber telephone number, calling telephone number, etc.) in the communication processing node As a result, it is possible to finely identify and set the priority order according to the importance of communication for each call, and even in a congested state, priority connection control of important communication can be performed and a call can be made reliably.

2) In the communication processing node, based on user identification information, class identification processing for identifying the importance of communication in units of calls and assigning priority, and connection control according to priority in call admission processing according to congestion regulation information By doing so, it becomes possible to control traffic according to priority, prevent delay time and packet loss, and prioritize high-priority communication so that important communication can be secured. It becomes.
3) In the communication processing node, based on user identification information, class identification processing that identifies the importance of communication in units of calls and assigns priority, and connection control according to priority in call admission processing according to congestion regulation information Therefore, during congestion, traffic control of the IP packet to be transmitted is performed, and the IP packet flowing through the IP communication network is reduced.

4) By performing IP packet transmission / reception processing by port allocation processing, VLAN processing, and Diffserv processing for each priority within the communication processing node, for high-priority communication, the path is designed with bandwidth in consideration of maximum traffic. It is possible to distribute a path whose bandwidth is designed in consideration of a certain amount of traffic to a path having a low priority. Therefore, there is no need to prepare a bandwidth-guaranteed path for all calls, and a bandwidth-guaranteed path is prepared only for the highest priority call, so that an economical and large-scale IP communication network can be constructed.

It is a block diagram of a conventional general IP communication control system. It is a schematic explanatory drawing which shows the existing priority control method. 1 is a configuration explanatory diagram of an IP communication control system according to an embodiment of the present invention. FIG. It is explanatory drawing which shows the structure of the call identification information processing part in the communication processing node of FIG. 3, and a class identification processing part for every call. It is explanatory drawing which shows the processing content of the call admission control process part of FIG. 3 by a matrix display.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 IP communication control system 20 Communication terminal device 30 Communication processing node 31 Call identification information processing part 32 Class identification processing part for every call 33 Call admission control processing part 34 IP packet transmission / reception processing part 35 Congestion control information processing part 40 Router 50 SIP server N IP communication network

Claims (3)

In the communication processing node, based on the identification information and communication destination information for each user, means for identifying the importance of the communication itself for each call, and performing class identification processing for determining the priority according to the importance ,
In the communication processing node, according to the priority of the call subjected to the class identification process based on the congestion regulation information, to classify the call into a call discard process, a partial reception, and a total reception, and to limit the call flow rate Means for performing call admission control processing;
Within the communication processing node, port distribution processing, VLAN processing, and Diffserv processing are set for partial reception and all reception of calls classified by call admission control processing, and IP communication is performed for high priority calls. Means for distributing IP packets to a path in which bandwidth in the network is reserved and performing IP packet transmission / reception processing;
In the IP communication network, when a high priority session is detected to be in a congested state, port allocation processing, VLAN processing, and Diffserv processing are set in the transfer system, and priority control and bandwidth guarantee routing processing are performed. An IP communication control system comprising: In the communication processing node, based on the identification information and communication destination information for each user, identify the importance of the communication itself for each call, and determine the priority according to the importance,
Within the communication processing node, according to the priority of the call subjected to the class identification process based on the congestion regulation information, the call processing is classified into call discard processing, partial reception, and all reception for each call, and call flow restriction is performed. Call admission control processing;
Within the communication processing node, port distribution processing, VLAN processing, and Diffserv processing are set for partial reception and all reception of calls classified by call admission control processing, and IP communication is performed for high priority calls. IP packet transmission / reception processing for distributing IP packets to a path in which bandwidth is reserved in the network;
In the IP communication network, when a high priority session is detected to be in a congested state, port allocation processing, VLAN processing, and Diffserv processing are set in the transfer system, and priority control and bandwidth guarantee routing processing are performed. And an IP communication control method. In the communication processing node, based on the identification information and communication destination information for each user, identify the importance of the communication itself for each call, and determine the priority according to the importance,
Within the communication processing node, according to the priority of the call subjected to the class identification process based on the congestion regulation information, the call processing is classified into call discard processing, partial reception, and all reception for each call, and call flow restriction is performed. Call admission control processing;
Within the communication processing node, port distribution processing, VLAN processing, and Diffserv processing are set for partial reception and all reception of calls classified by call admission control processing, and IP communication is performed for high priority calls. IP packet transmission / reception processing for distributing IP packets to a path in which bandwidth is reserved in the network;
In the IP communication network, when a high priority session is detected to be in a congested state, port allocation processing, VLAN processing, and Diffserv processing are set in the transfer system, and priority control and bandwidth guarantee routing processing are performed. An IP communication control program for causing a computer to execute processing for executing

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