CN100414907C - Resource Management Method Based on Signaling Mechanism in IP Telecom Network System - Google Patents

Abstract

A resource management method based on a signaling mechanism in an IP telecommunication network system. The method classifies services in the IP network, establishes several virtual private networks for each type of service, and determines the link configuration of the virtual private network. resource. Before the communication starts, a connection is established in the virtual private network applied for by the user who needs to use resources, and the resources used by the connection are deducted from the resource table of the virtual private network applied for. After the communication is over, the connection should be removed, and the released resources should be released back into the resource table of the virtual private network. During the communication process, access control is only performed at the edge gateway device, and the node devices participating in the virtual private network do not perform resource control and management. By using the resource management method, the service network established on the IP telecommunication network can have good service quality assurance.

Description

Resource Management Method Based on Signaling Mechanism in IP Telecom Network System

technical field

The invention relates to a method for realizing resource management in an IP telecommunication network system, in particular to a resource management method based on a signaling mechanism in an IP telecommunication network system, and belongs to the field of communication technology.

Background technique

At present, the Internet is the second largest network system after the telecommunication network. The IP network has been widely used because of the success of the Internet. An extremely large number of application services have been opened on the Internet and have entered the traditional telecommunication business field, which has had a great impact on the monopoly position of telecommunication. On the other hand, the traditional TDM (Time Division Multiplexing, Time Division Multiplexing) technology cannot meet the needs of the vigorous development of multimedia services, especially it has difficulties in resource scheduling, and cannot meet the requirements of broadband, narrowband, real-time, and non-real-time features. requirements of multimedia services. Based on the existence of these practical problems, telecommunication experts began to re-examine the development direction of the telecommunication network.

At present, most experts in the field of communication and information believe that IP network is the development direction of next-generation network. However, the current IP networks are all based on existing Internet technologies and design concepts. One of the biggest technical obstacles in this IP network is the "Quality of Service" (QoS) issue. Although Americans began to propose the concept of the Next Generation Internet (NGI) in 1996, the research work on solving the "quality of service" problem of the IP network has never stopped, and successively proposed "inter-serv", "diff-serv", Traffic engineering, RSVP, MPLS and other technical solutions, and in recent years, the resource management solution based on signaling has been brought up again. However, all technical solutions proposed so far are either overly complex or poorly scalable, and are not ideal solutions.

Under the background that the current telecommunication network technology is in the process of fundamental transformation, people gradually realize that the next generation telecommunication network should adopt IP network based on packet switching technology and non-connection-oriented working mode. For this reason, the present inventor proposed the technical idea of IP telecommunication network, and applied for the invention patent (publication number: CN1578238, publication date: February 9, 2005) named "IP telecommunication network system and its realization method". Compared with the existing Internet, this IP telecommunication network is provided by the telecommunication network itself with a degree of trust and security mechanism, and at the same time, it also has the high stability, reliability and high manageability of the telecommunication network, and the resources can be managed and controlled. Hence a secure, trusted, controllable and manageable network.

In the technical solution of the IP telecom network, since it adopts the unique dual-address technology, and introduces the re-addressed connectionless data network (hereinafter referred to as the NCT data network) and the address mapping device ADT that realizes the dual-address mapping, resulting in new resources management technology. Therefore, the technical means to realize resource management in the IP telecommunication network are very different from the existing technologies. The present invention provides a technical solution for realizing resource management in the IP telecommunication network system.

Contents of the invention

The purpose of the present invention is to provide a method suitable for the IP telecommunication network system and adopting a signaling mechanism to realize resource management aiming at the technical characteristics of the IP telecommunication network. This resource management method is especially suitable for telecom users or enterprise users who only have a small amount of resources.

A resource management method based on a signaling mechanism in an IP telecommunication network system, characterized in that:

1) classify the business in the IP network, set up several virtual private networks respectively for each type of business, and determine resources for the link configuration of the virtual private network;

II) According to the resource requirements of users in the virtual private network, the edge gateway device connected to it sends a signaling with resource requirement parameters, and transmits it to each relevant node in the virtual private network, and each node belongs to the virtual private network. When the stock resources of the network can be satisfied, a connection is allowed to be established to ensure the user's resource requirements.

in,

Before the communication starts, a connection should be established in the virtual private network applied for by the user who needs to use resources, and the resources used by the connection should be deducted from the resource table of the virtual private network applied for;

After the communication ends, the connection is removed, and the released resources are added back to the resource table of the virtual private network.

During the connection establishment process, if the resources belonging to the virtual private network in the nodes along the way cannot meet the resources required by the connection, the connection cannot be established.

During the communication process, access control is only performed at the edge gateway device, and the node devices participating in the virtual private network do not perform resource control and management.

In the step 1), the link resources are configured as follows:

1) The user proposes a network resource requirement to the network management device;

II) The network management device calculates the resources of each link of the network node device according to the user's resource requirements, and the network management device sends a resource configuration command to the network node device in the relocation connectionless data network;

III) The network node device receives the resource configuration command, and sends a confirmation response or a rejection response according to the resource conditions of each link of the network node device;

If the resources owned by the network node device can meet the resources required by the resource configuration command, a confirmation response will be sent, otherwise a rejection response will be sent;

A confirmation response is issued indicating that the resource configuration is successful;

IV) The network management device sends a command to the address translation device including the parameters of the service category and virtual private network number, and the resource configuration is completed.

Or, in the step 1), the link resources are configured as follows:

1) The user proposes a demand for network resources to the network management device;

II) The network management device sends a resource configuration command to the edge gateway device;

III) The source edge gateway device sends a virtual private network configuration request to the destination edge gateway device;

IV) Each re-addressed connectionless data network node device passing by, responds according to its own resource situation after receiving the request: if the resource of the node can support, then the re-addressed connectionless data network node device configures the link according to the request resources, and forward the request to the next node until the destination edge gateway device; if the resources of the destination edge gateway device can support it, the destination edge gateway device sends an acceptance response to the source edge gateway device; if the source edge gateway device receives the destination edge gateway device If the edge gateway device at the source end accepts the response, the edge gateway device at the source end immediately sends a confirmation response to the network management device;

V) The network management device receives confirmation responses from all edge gateway devices of the virtual private network, and the network management device sends an order to the address mapping device with the parameters of the business category and the virtual private network number; the address mapping device receives an order from the network The command of the management device is to return the confirmation response; the network management device receives the confirmation response; the resource configuration is successful.

The resource management method described in the present invention is aimed at VPN users who only have a small amount of resources. These users cannot use resource alarm technology to realize network resource management, and can only use signaling technology to realize network resource management through accurate management of resources. By using the resource management method, the service network established on the IP telecommunication network can have good service quality assurance.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

FIG. 1 is a schematic diagram of the composition and structure of the IP telecommunication network system.

Fig. 2 is a schematic flow diagram of the basic process of the method of the present invention.

Detailed ways

As shown in FIG. 1 , in the invention patent "IP telecommunication network system and its implementation method" mentioned in the background technology, the inventor proposed a specific implementation scheme of the IP telecommunication network. The IP telecommunication network includes a relocation connectionless data network (hereinafter referred to as NCT data network) as an "intranet" and an IP network as an "external network". The connection between the NCT data network and the IP network is realized through the edge gateway device ED . The inner NCT data network and the outer IP network use NCT address and IP address respectively for addressing, and the address mapping device ADT saves the mapping relationship between the two sets of addresses in its internal address mapping table. All devices in the NCT data network and edge gateway devices are assigned NCT addresses, all devices in the IP network and edge gateway devices are assigned IP addresses, and edge gateway devices are authenticated to establish connections with address mapping devices. In the IP telecommunication network system, the NCT data network adopts a hierarchical architecture similar to the existing telecommunication switching network, which consists of core layer equipment CR, convergence layer equipment MR, access layer equipment AR, network management equipment and address mapping equipment , each NCT data network communicates through its own core layer device CR. The NCT address is used for addressing within the NCT data network.

As the implementation plan of the next generation telecommunication network, the above-mentioned IP telecommunication network must adopt a new resource management mechanism in order to make full use of the hardware resources of the IP telecommunication network, flexibly and efficiently meet the various needs of telecommunication users, and make the operation on the IP telecommunication network All telecommunication services have received the expected quality of service guarantee. Therefore, aiming at the technical characteristics of the IP telecommunication network, the inventor proposes a resource management method based on a signaling mechanism. This method is especially suitable for telecom users and enterprise users who only have a small amount of resources. In this case, the resource needs of telecom users can be directly met by establishing several virtual private networks, that is, the services in the IP network are divided into several categories, and each type of service includes several virtual private networks to meet different requirements. Telecom users. Each virtual private network has independent resources, and the resources in each virtual private network are managed through signaling, so as to ensure the resource requirements of users.

As shown in FIG. 2 , the resource management method based on the signaling mechanism can be divided into two main stages, which are: 1. Establishing a VPN to implement resource configuration; 2. Performing access control and resource management through signaling. The following is a detailed description of this.

One of the characteristics of the IP telecommunication network is that it adopts the method of establishing a virtual private network independent of different resources for resource management. The process of resource allocation is carried out at the same time as the process of establishing a virtual private network. For a detailed description of the process, refer to the inventor's previous patent application "Method for Realizing Virtual Private Network in IP Telecommunication Network System" (application number: 200410062652.4, filing date: July 8, 2004). The following only briefly describes the process of establishing a virtual private network.

In the IP telecommunication network, there are two methods for resource allocation (that is, establishment of a virtual private network) for network node devices, which are described as follows:

The first method includes the following steps:

) The user who needs resources puts forward network resource requirements to the network management device;

The network resource requirements here are very specific network resource configuration information, including traffic between nodes, flow table, and service category content.

) The network management device calculates the resources required by each link of the network node device according to the resource requirements of the telecommunication users, and determines the number of the virtual private network. The network management device sends a resource configuration command with information such as service category, virtual private network number, resource requirements, etc. to the network node device in the NCT data network;

) The network node device receives the resource configuration command, and sends a confirmation response or a rejection response according to the resource conditions of each link of the network node device.

If the resources owned by the network node device can meet the resources required by the resource configuration command, a confirmation response will be sent, otherwise a rejection response will be sent.

) After the network management device receives the confirmation responses from all relevant network node devices, it sends commands with parameters such as service category and virtual private network number to the address translation device ADT. After the ADT device sends back confirmation responses, the virtual private network is established.

The second method includes the following steps:

) Telecom users who need resources put forward network resource requirements to the network management equipment;

The network resource requirements here are very specific network resource configuration information, including traffic between nodes, flow direction tables, service categories, and so on.

) The network management device sends a resource configuration command with service category and resource requirements to the ED device;

) The source ED device sends a virtual private network configuration request to the destination ED according to the main route of the NCT data network, or simultaneously starts the NCT data network backup route to send a virtual private network configuration request;

) each NCT data network node device that passes through, responds according to its own resource conditions after receiving the request: if the resource conditions of the node can support, the NCT data network node device configures link resources according to the request, and sends to the next The node forwards the request until the destination ED device; if the resources of the destination ED device can support it, the destination ED device sends an acceptance response to the source ED device. If the ED device at the source end receives the acceptance response from the ED device at the destination end, the source ED immediately sends back an acknowledgment response to the network management device.

) The network management device receives confirmation responses from all ED devices participating in the virtual private network, and sends commands with parameters such as service category and virtual private network number to the ADT device. ADT receives a command from the network management device, that is, sends back an acknowledgment response. The network management device receives an acknowledgment response. The virtual private network is established successfully.

If the resource status of the node device or the destination ED device does not support it, the NCT node device or the destination ED device sends a rejection response to the source ED device. This configuration is invalid. If the startup timer of the source-end ED device times out and no acceptance/rejection response has been received, the source-end ED device also considers this configuration invalid. In the above two cases, it is considered that the establishment of the virtual private network is unsuccessful.

After the ED device at the source end sends out a virtual private network configuration request, each node forwards it to establish a virtual private network, which can establish a virtual private network according to the current network situation and realize resource allocation.

For VPN users with a small amount of resources, it is obviously inappropriate to use the link resource threshold alarm mechanism, because even if the alarm threshold is set at 50%, for example: a certain link resource in the VPN is set to 2M, 900K is currently occupied, because there is no When the alarm threshold is reached, the VPN will obviously not alarm. If there is a call that requires 1.2M to be connected, the network access end cannot be sure that a certain link in the network has insufficient resources, because there is no resource alarm information , the access terminal still connects the call, obviously the VPN will "crowd" other people's resources, which will not be allowed, because it cannot ensure the resource allocation of the network.

In this case, it is necessary to use a signaling mechanism to allocate resources precisely.

Specifically, for VPN users with a small amount of resources, each service (call) connection needs to establish a connection between the ED (sending end) and the ED (receiving end). The resources required for the sub-business are determined. If the link resources along the way can meet the needs of this service, the connection can be established; if the resources cannot meet the requirements, the connection cannot be established.

The specific steps of the signaling mechanism are:

) The ED (sending end) device directly sends out a connection establishment request command with parameters such as the receiving end ED address and resource requirements according to the resource requirements of the user.

) After receiving the command, each node device passing through the connection establishment request command makes a corresponding response according to the VPN inventory resources. If the VPN inventory resources of the node can support the resources required by the connection establishment request command, the connection establishment request command is sent to To the next node device, if the existing VPN resources of the node cannot support the resources required by the connection establishment request command, a connection establishment failure response is sent to the ED (sending end) device.

) When the ED (receiving end) device receives the connection establishment request command, indicating that the resources of the entire VPN can meet the resource requirements of the call, the ED (receiving end) device sends a connection establishment confirmation response to the ED (sending end) device.

) The node device through which the connection establishment confirmation response passes deducts the resource used for this connection from its VPN resource table, and the ED (sending end) device receives the connection establishment confirmation response, and the connection establishment is successful.

V) Enter the normal communication stage.

After the communication is completed, it will enter a connection teardown process.

VI) Both the ED (sending end) device and the ED (receiving end) device can initiate the connection teardown process. Take the ED (sending end) device initiating the connection tearing down process as an example: the ED (sending end) device sends a message with the receiving end ED address, A connection teardown request command with parameters such as resources.

VII) After receiving the command, each node device passing through the connection teardown request command releases the resources occupied by the connection, correspondingly increases this part of resources in its VPN resource table, and sends the connection teardown request command to the next node device

VIII) When the ED (receiving end) device receives the connection removal request command, the ED (receiving end) device sends a connection removal confirmation response to the ED (sending end) device, and the ED (sending end) device receives the connection removal confirmation response, the The connection is removed successfully.

In the process of communication, access control is only performed at the edge gateway device, and node devices participating in the virtual private network do not perform resource control and management.

The resource management method based on the signaling mechanism in the IP telecommunication network has been described in detail above, but obviously the specific implementation form of the present invention is not limited thereto. For those skilled in the art, various obvious changes made to the method of the present invention without departing from the spirit of the method and the scope of the claims are within the protection scope of the present invention.

Claims (6)

1. A resource management method based on signaling mechanism in IP telecommunication network system is characterized in that:

I) classifying services in an IP network, respectively establishing a plurality of virtual private networks for each type of services, and configuring and determining resources for links of the virtual private networks;

II) according to the resource requirement of the user in the virtual private network, the edge gateway equipment connected with the virtual private network sends a signaling with a resource requirement parameter to transmit the signaling to each related node in the virtual private network, and under the condition that the stock resources of each node belonging to the virtual private network can be met, connection is allowed to be established so as to ensure the resource requirement of the user.

2. A method for resource management in an IP telecommunications network system based on a signaling mechanism as claimed in claim 1, characterized by:

before communication begins, establishing connection in a virtual private network applied by a user needing to use resources, and deducting the resources used by the connection from a resource table of the virtual private network applied by the user;

and after the communication is finished, the connection is dismantled, and the released resources are added back to the resource table of the virtual private network.

3. A method of resource management in an IP telecommunication network system based on a signalling mechanism according to claim 1 or 2, characterized in that:

in the process of establishing the connection, if the resources belonging to the virtual private network cannot meet the resources required by the connection in the nodes along the path, the connection cannot be established.

4. A method of resource management in an IP telecommunication network system based on a signalling mechanism according to claim 1 or 2, characterized in that:

in the communication process, access control is only carried out at the edge gateway equipment, and the node equipment participating in the virtual private network does not carry out resource control and management.

5. A method for resource management in an IP telecommunications network system based on a signaling mechanism as claimed in claim 1, characterized by:

in step I), the link resources are configured as follows:

I) a user puts forward a network resource requirement to network management equipment;

II) the network management equipment calculates the resources of each link of the network node equipment according to the resource requirements of the user, and the network management equipment sends a resource configuration command to the network node equipment in the multi-address connectionless data network;

III) the network node equipment receives the resource configuration command and sends out a confirmation response or a rejection response according to the condition of each link resource of the network node equipment;

if the resources owned by the network node equipment can meet the resources required by the resource configuration command, sending a confirmation response, and otherwise, sending a rejection response;

sending out a confirmation response to indicate that the resource allocation is successful;

IV) the network management equipment sends a command containing the service type and the virtual private network number parameter to the address conversion equipment, and the resource allocation is completed.

6. A method for resource management in an IP telecommunications network system based on a signaling mechanism as claimed in claim 1, characterized by:

in step I), the link resources are configured as follows:

I) a user puts forward a requirement on network resources to network management equipment;

II) the network management equipment sends a resource configuration command to the edge gateway equipment;

III) the source edge gateway equipment sends a virtual private network configuration request to the destination edge gateway equipment;

IV) each multi-address connectionless data network node equipment passing through responds according to own resource conditions after receiving the request: if the resources of the node can be supported, the multi-address connectionless data network node equipment configures link resources according to the request and forwards the request to the next node until the destination edge gateway equipment; if the resources of the destination edge gateway device can be supported, the destination edge gateway device sends an acceptance response to the source edge gateway device; if the source edge gateway device receives the receiving response of the destination edge gateway device, the source edge gateway device immediately sends a confirmation response back to the network management device;

v) the network management equipment receives the confirmation response of all edge gateway equipment of the virtual private network, and the network management equipment sends a command with a service class and a virtual private network number parameter to the address mapping equipment; the address mapping equipment receives a command from the network management equipment, namely, returns a confirmation response; the network management equipment receives the confirmation response; the resource allocation is successful.

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