KR20040046848A - Multi protocol label switching system based asynchronous transfer mode and port connection method - Google Patents

Abstract

PURPOSE: An ATM-based MPLS(Multi Protocol Label Switching) system and a port connection method thereof are provided to install only one port between an LER(Label Edge Router) system and an LSR(Label Switched Router) system, and to connect an LER with an LSR through the port, thereby reducing the number of ports connected between systems. CONSTITUTION: A system controller decides whether a multifunctional port portion is set by an IP PVC connection or an MPLS connection(S60). If a system operator selects the IP PVC connection, the system controller assigns an IP/MPLS group of the multifunctional port portion to the LIS(Local IP Subnet) connection(S61), and if the operator selects the MPLS connection, the controller assigns the IP/MPLS group to the MPLS connection. If the MPLS connection is used, the operator selects whether to use all IP/MPLS groups for the MPLS connection(S62). If so, all the IP/MPLS groups are used for the MPLS connection(S66).

Description

AMT-based MPS system and its connection method {MULTI PROTOCOL LABEL SWITCHING SYSTEM BASED ASYNCHRONOUS TRANSFER MODE AND PORT CONNECTION METHOD}

The present invention relates to an Asynchronous Transfer Mode (ATM) -based Multi Protocol Label Switching (MPLS) system, and more particularly, to an AL system in an AMT-based MPLS system (LER). If both LLS (Logical IP Subnet) connection and MPL connection are required between LSR system, LIA through one port set between LLA and LS system The present invention relates to an ATM-based MPS system for enabling S connection and MPS connection and a port connection method thereof.

In general, ATM-based AR systems are ATM PVC, ATM Switched Virtual Circuit (ATM PVC) group, IP (Internet Protocol) by port. / MPS group, and the system administrators can use the resources (Bandwidth, VPI, VCI) by dividing them for each AMT MPV, ATM SBC, IP / MPS even within the same port. Connection management and resource management.

On the other hand, PBC connection is a statically established connection by the operator or configuration information, the connection configuration using the resources of the AMT PC group, SBC connection is connected to the signaling protocol (B-ISUP, PNNI, etc.) As the connection is dynamically set, the connection is configured using the resources of AMT SBC group.

In addition, IP / MPS group can be used for two purposes. If the port is connected to the router, the IP / MPS group is used for the IP FBC connection, also referred to as LS connection, and the corresponding port is If connected to LS, the IP / MPS group is used for MPS connection.

Here, the MPS connection is a connection for processing MPS traffic, and the LC-ATM (LC-ATM) connection is connected to the MPS signaling (LDP, CR-LDP, RSVP-TE) It refers to an LC-ATM control connection that transmits and receives a signaling message and a routing message for controlling the LC-ATM connection.

FIG. 1 is a schematic view showing a schematic configuration of a conventional AMT-based MPS system, which will be described with reference to FIGS. 2 and 3.

In general, the ingress AL 11-1 is connected to the routers 10-1 and 10-2 outside the network through the first port and the second port, and the egress in the ATM-based MPS system. The LS 11-2 is physically connected to the LS 10 through the sixth and seventh ports directly with the routers 10-4 and 10-5 outside the network.

In addition, inside the MPS network, the inlet and outlet L11 (11-1, 11-2) and the LS 12-1, 12-2 is configured to be connected to the MPS is connected.

That is, the thin solid line in FIG. 1 is a port (first port, a second port, a sixth port, a seventh port) indicating an LS connection, and the thick solid line is a port (fourth port) representing an MPS connection. The thin dotted line indicates a port necessary for connection when the entrance LS 11-1 is connected to the router 10-3 outside the network through the first LS 12-1 (LS3, F5). Port).

At this time, since one port (fourth port) connected between the inlet LS 11-1 and the first LS 12-1 system cannot be used in combination with the LS connection and the MPLS connection, the inlet A fifth port is required between the LS 11-1 and the first LS 12-1 inside the network, in addition to the fourth port for the conventional MPLS connection, as a port for the LS connection.

That is, as described above, in the ports used by being divided into the AMT PBC group, the AMT SB group, IP / MPS group, the inlet LED 11-1 and the first LS 12- The fourth port for connecting 1) to MPS uses an IP / MPS group for MPS connection, as shown in FIG.

In addition, the fifth port for connecting the LS between the router 10-3 and the first LS 12-1 outside the network, as shown in FIG. 3, may be referred to as an IP / MPS group. Used for BC connection (for LS connection).

Therefore, as in the case of the LS system connecting to the router through the LS system in the MPS internal network in the LS system, both the LS connection and the MPS connection between the LS system and the LS system are If necessary, a port is required for each connection between the LS and the LS system.

In other words, when allocating resources to the IP / MPS group, it is possible to allocate the resources by dividing them into MPS connection or IPPV connection (for LS connection).

In the prior art as described above, in the case of the LS connection to the router through the LS system existing in the MPLS internal network in the LS system, for the MPLS connection between the LS and LS In addition to setting the port and to set a separate port for the LS connection, as the number of systems increases the number of ports to be installed, there was a problem that the system installation and maintenance costs increase.

Therefore, the present invention has been proposed to solve the above conventional problems, in the case of the need for both the LS connection and MPS connection between the LS system and the LS system in the AMT-based MPLS system, It is an object of the present invention to provide a port and a connection method for installing only one port between the LS system and the LS system, and enabling the LS connection and the MPLS connection through the port.

1 is a block diagram showing a schematic configuration of a conventional general AMT-based MPS system.

2 is a structural diagram showing a structure of a fourth port for MPS connection in a conventional general AMT-based MPS system.

Figure 3 is a structure showing the structure of a fifth port for the conventional ATM-based MPLS system, LS connection.

Figure 4 is a block diagram showing a schematic configuration of a port connection method in the AMT-based MPS system according to the present invention.

Figure 5 is a structural diagram showing the structure of the multi-functional port for MPS connection and LS connection in the AMT-based MPS system of the present invention.

Figure 6 is a flow chart showing the operation of the port connection method in the ATM-based MPS system of the present invention.

*** Description of the symbols for the main parts of the drawings ***

10-1,10-2,10-3,10-4,10-5,40-1,40-2,40-3,40-4,40-5: Router

11-1,41-1: Entrance L11-2,41-2: Exit L

12-1,42-1: first LS 12-2,42-2: second LS

43: Multifunction Port

The present invention for achieving the above object, in the AMT-based MPLS system, it characterized in that it comprises a multi-functional port portion capable of the LS connection or MPLS connection according to the settings of the system operator.

In addition, the present invention comprises the steps of selecting the IP / MPS group in the MP / PS connection or MPS connection according to the selection of the system operator; In the above step, if the IP FBC connection is selected, the step of assigning and using the IP / MPS group in the multi-functional port unit for the LS connection; In the above step, if the MPS connection is selected, the step of assigning and using the IP / MPS group in the multi-functional port unit for MPS connection; In the above step, in the case of using the multi-functional port portion assigned to the MPS connection, the step of assigning and using all or part of the IP / MPS group in the multi-functional port portion for MPS connection according to the operator's selection It is characterized by.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 4 is a schematic diagram illustrating a port connection method in an Asynchronous Transfer Mode (ATM) -based MPLS system (MPLS). Referring to FIGS. 5 and 6, FIG. Will be explained.

In a typical AMT-based MPS system, the ingress (LE) Label Edge Router (LER) 41-1 is connected to the routers 40-1 and 40-2 outside the network through the first port and the second port. Egress 41-2 is physically directly connected to the routers 40-4 and 40-5 external to the network through the sixth port and the seventh port.

In addition, inside the MPS network, the entrance and exit LLS (41-1, 41-2) and LSR (LSR, Label Switched Router) (42-1, 42-2) is configured to be connected to the MPS interlocked.

That is, the thin solid line in FIG. 4 is a port indicating the LS connection (first port, the second port, the sixth port, the seventh port), and the thick solid line is a port indicating the MPS connection (fourth port, etc.). .

At this time, in case of making the LS connection with the router 40-3 outside the network through the first LS 42-1 existing in the MPL internal network at the entrance LS 41-1, the router ( A port (third port) is installed between the 40-3) and the first LS 42-1, and the first LS 42-1 and the inlet EL41 41-1. Between) install a multi-functional port portion 43 for MPS connection and LS connection.

Here, the multi-function port unit 43, as shown in Fig. 5, is divided into the inside for the IP FBC connection or MPS connection according to the setting of the system operator.

That is, ATM PVC, ATM Switched Virtual Circuit (ATM PVC) group, ATM SVC (ATM SVC, ATM Switched Virtual Circuit) group is used according to the operator's needs as conventional, IP (IP , Internet Protocol) / MPS group manages connection and resource management for resources (bandwidth, VPI, VCI) by distinguishing for IPPBC connection and MPS connection.

At this time, each group inside the multi-function port unit 43 can be changed and set according to the requirements of the system environment and the operator.

And, for the IP / MPS group in the multi-functional port unit 43, according to the user's setting it is again distinguished for the IP PBC connection (for the LS connection) and MPS connection, one of the The port can be used to connect to LS or MPS.

On the other hand, a port connection method in the AMT-based MPS system according to the present invention will be described with reference to FIG.

In general, when the system operator determines whether to use the IP / MPS group in the multi-function port unit 43 by assigning the IP FBC connection or the MPS connection, the controller of the system determines that the multi-function port unit 43 It is determined whether the IP FBC connection or MPS connection is set (S60).

When the system operator selects the IP FBC connection, the IP / MPS group in the multi-functional port unit 43 is used for allocating the LS connection for use (S61), and the MPS connection is selected for the MPS connection. Used by assigning.

In this case, when the system operator selects to use the IP / MPS group in the multi-function port unit 43 for MPS connection and uses it, the system operator applies all the IP / MPS group in the multi-function port unit 43 to the MP. Select whether or not to use for the LS connection (S62), if you choose to use all the IP / MPLS group for MPS connection if all the IP / MPS group in the multi-functional port portion 43 is MPS connection It is used for (S66).

On the other hand, if a part of the IP / MPS group is selected to use for MPS connection, the part of the IP / MPS group in the multi-functional port unit 43 is allocated and used for MPS connection, the other part is connected to the LS Assigned and used for

Here, when using a part of the IP / MPS group in the multi-functional port unit 43 for the connection to the PS, the IP configuration management unit (IP Configuration Management, IPCM) for controlling and managing the IP packet input to the system In accordance with the MP / MPS connection management unit (MPLS Connection & Resource Management, MCRM) that manages the resources allocated to the request for the allocation of connection resources and bandwidth to a part of the IP / MPS group (S63).

The MPS resource connection management unit is controlled through MPS signaling such as LDP (Label Distribution Protocol), RSVP (ReSource reserVation Protocol), etc. The IP setting management unit connects to the MPS resource connection management unit like the MPS signaling. Transmit the bandwidth allocation request signal.

Next, if the MPS resource connection management unit approves allocation for the requested resource and bandwidth (S64), a part of the IP / MPS group in the multi-functional port unit 43 is used for the connection to the LS (S65). .

That is, according to the system operator's selection, the multi-function port unit 43 allocates all or part of resources allocated to the IP / MPS group to the IP / MPS group or the MPS connection to the IP / MPS group in the port. It becomes available for assignment.

As described above, according to the present invention, in the MT-based MPLS system, when both the LS connection and the MPLS connection are required between the LS system and the LS system, between the LS system and the LS system By installing only one port in the port and enabling the LS connection and the MPS connection through the port, it is possible to reduce the number of ports connected between systems, thereby reducing the cost of installing and maintaining the port.

Claims (4)

ATM based MPS system, AMT based MPS system comprising a multi-port port that can be connected to the LS connection or MPS according to the settings of the system operator. The ATM-based MPS system of claim 1, wherein the multi-functional port unit separates and manages port resources for IPPBC connection and MPS connection according to a system operator's selection. Selecting an IP / MPS connection or an MPS connection from the IP / MPS group in the multi-function port unit according to a selection of a system operator; If the IP FBC connection is selected, assigning and using an IP / MPS group in the multi-function port unit for the LS connection; If the MPS connection is selected, assigning and using the IP / MPS group in the multi-functional port unit for MPS connection; If the multi-functional port portion assigned to use for MPS connection, the step of assigning all or a part of the IP / MPS group in the multi-functional port unit for MPS connection according to the operator's selection, characterized in that it comprises using for Port connection method of AMT based MPLS system. 4. The method of claim 3, wherein the allocating a part of the IP / MPS group in the multi-function port unit to use for MPS connection comprises: requesting connection resource and bandwidth allocation from the IP setting management unit to the MPS resource connection management unit. Wow; Acknowledging the allocation of connection resources and bandwidth by an MPS resource connection management unit according to the request; And a portion of the IP / MPS group in the multi-function port unit for use in connection with the PS connection according to the approval.