KR20070033716A - How to provide bandwidth control on-demand dedicated line service in MSP and ASON network - Google Patents

Abstract

The present invention relates to a bandwidth control on-demand dedicated line service providing method in MSPP, ASON network. Bandwidth Control Access the BoD leased line service platform through the public internet network using the client of the leased line on-demand service to check user authentication, and if the customer requests to modify the bandwidth of the leased line currently used, determine the bandwidth increase / decrease. Doing; If the bandwidth of the existing circuit is requested, allocating the free VC12 2M time slot as much as the additional bandwidth of the customer if there are free VC12 time slots corresponding to the bandwidth required by the customer in the VC3 trunk circuit; If there are not enough free VC12 timeslots on the existing VC3 trunk circuit, request the ASON management server to create a new VC3 circuit, create a new VC3 circuit, and allocate the free VC12 2M time slots as much as the bandwidth required by the customer. ; And assigning as many VC12 time slots as necessary to the customer, and if the number of remaining free VC12 time slots is smaller than the first threshold value (CR_Threshold value) is small, then the creation of a new VC3 trunk line in the corresponding direction to the ASON management server. Requesting to create a new VC3 trunk circuit.

In addition, if bandwidth reduction is required for an existing circuit, the VC12 time slot of the requested VC12 time slots of the existing VC12 time slots allocated to the customer are deallocated and designated as a free VC12 time slot, and the entire VC3 circuit set in the corresponding direction If the number of free VC12 time slots is greater than the second threshold value (RM_Threshold value), requesting deletion of the unused VC3 circuit after the defragmentation is performed to the ASON management server to delete the empty VC3 circuit.

According to the present invention, a multi-service acceptance platform (MSPP), automatic switching optical network (ASON) in the trunk of the ASON interval by the ASON management server efficiently when the BoD leased line service platform is required in accordance with the customer bandwidth increase / decrease requirements It is effective to provide bandwidth control on demand dedicated line service by creating and canceling

Optical network, optical line distribution system (OXC), user-network interface (UNI), signaling, protocols, ASON

Description

MSP, Method for providing bandwidth-on-demand leased line service over network of MSPP, ASON

1 is a configuration diagram of a bandwidth control on-demand dedicated line service network consisting of MSPP, ASON according to an embodiment of the present invention.

2 shows an example of a VC12 time slot assignment table present in a VC3 circuit;

FIG. 3 illustrates a case in which a completely empty VC3 circuit is generated by defragmenting internal VC12 time slots when there are a plurality of VC3 circuits.

4 is a flow chart for VC3 line creation / deletion between MSPP and ASON implemented in a bandwidth-modulated on-demand (BoD) dedicated line service platform and used in conjunction with an ASON management server.

The present invention relates to a method for providing bandwidth-adjusted dedicated line service in a multi-service acceptance platform (MSPP) and automatic switched optical network (ASON) network, and more particularly, ASON implemented by SONET / SDH optical transmission technology. In a network configured with a multi-service acceptance platform (MSPP), if the bandwidth increase demand is not sufficient according to the customer's bandwidth increase / decrease demand in the ASON section, a new VC3 trunk line (45M) is created and the customer's bandwidth is reduced. In the MSPP, ASON network, which provides bandwidth-modified on-demand line service that can increase / decrease bandwidth by 2M by deleting trunk lines that are not used on demand. It is about.

The Multi-Service Provisioning Platform (MSPP) system is composed of a plurality of RT (Remote Terminal) systems located at the customer side and a Central Office Terminal (COT) system located at the national office. Under control, it provides a dedicated line service that can increase or decrease the bandwidth between 2M units.

The Automatic Switched Optical Network (ASON) is an intelligent optical transmission network composed of an optical cross-connect system (OXC), and an optical internetworking forum (OIF: Optical) for automatic line setting of 45M units. It has a UNI signaling interface defined by the Internetworking Forum.

The MSPP COT system is interworked with the automatic switching optical network (ASON), and uses the 45 M bandwidth line provided by the automatic switching optical network (ASON) as a trunk line to allocate the bandwidth of 2 M units in real time at the request of a customer. It will provide a dedicated line service on demand.

However, sufficient bandwidth must exist in the 45M unit (VC3) trunk line provided in the ASON section to provide a dedicated leased line service capable of increasing or decreasing the bandwidth (V12) in 2M units. If there is not enough bandwidth, the customer's request for increased bandwidth will be denied.

If the trunk line corresponding to the maximum bandwidth that the customer can request in the automatic switching optical network (ASON) section is configured in advance, there is no problem in providing the above-described dedicated leased line service, but the customer can Even if not all of them are used, network bandwidth resources must be allocated, resulting in an inefficient operation of the network.

In order to solve this problem, the present invention, in the network consisting of ASON (Automatic Switched Optical Network) implemented by SONET / SDH optical transmission technology and a multi-service acceptance platform (MSPP) connecting the subscriber and ASON, If the bandwidth increase / decrease demand is not sufficient, create a new VC3 trunk line (45M) and delete the unused trunk line when the customer requires a bandwidth reduction. In order to provide a bandwidth-on-demand dedicated line service in 2M units, the present invention provides a method for providing a bandwidth-adjusted dedicated line service in an MSPP or ASON network.

In order to achieve the above technical problem, a method for providing a bandwidth-adjusted dedicated line service in an MSPP and ASON network according to the present invention includes an automatic switching optical network (ASON) consisting of a plurality of optical line distribution systems (OXC) and a plurality of customer-side services. MSPP RT system of MSPP, MSPP COT system located in the national office to connect the MSPP RT system to the Automatic Switching Optical Network (ASON), MSPP including an on-demand dedicated line service platform connected to the client via the Internet network, ASON management server, A method for providing a bandwidth-modified on-demand dedicated line service in a network composed of ASON, using a client of a bandwidth-modified on-demand dedicated line service, accesses a BoD leased line service platform through a public Internet network, and confirms user authentication, and is currently used by a customer. Require bandwidth modification of dedicated leased line Surface, the method comprising: determining the bandwidth increase / decrease; If the bandwidth of the existing circuit is requested, allocating the free VC12 2M time slot as much as the additional bandwidth of the customer if there are free VC12 time slots corresponding to the bandwidth required by the customer in the VC3 trunk circuit; If there are not enough free VC12 timeslots on the existing VC3 trunk circuit, request the ASON management server to create a new VC3 circuit, create a new VC3 circuit, and allocate the free VC12 2M time slots as much as the bandwidth required by the customer. ; And assigning as many VC12 time slots as necessary to the customer, and if the number of remaining free VC12 time slots is smaller than the first threshold value (CR_Threshold value) is small, then the creation of a new VC3 trunk line in the corresponding direction to the ASON management server. Requesting to create a new VC3 trunk circuit.

In addition, in the MSPP, ASON network according to the present invention, the bandwidth control on-demand dedicated line service providing method, if the existing circuit requires a bandwidth reduction of the VC12 time slot of the requested bandwidth of the existing VC12 time slots assigned to the customer Deallocate it as a free VC12 time slot, and if the total number of free VC12 time slots in the VC3 line set in that direction is greater than the second threshold (RM_Threshold value), then delete the unused VC3 line after defragmentation. Requesting the ASON management server to delete the empty VC3 line.

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

1 is a configuration diagram of a bandwidth-controlled dedicated line service network composed of MSPP and ASON according to an embodiment of the present invention.

In a network composed of MSPP and ASON, a bandwidth-on-demand dedicated line service providing apparatus is an Automatic Switched Optical Network (ASON) composed of multiple regional optical line distribution systems (OXCs) 1. Optical Network), a plurality of MSPP RT systems (3) located at the customer's side, MSPP COT system (4) located at the station of the telephone company and connected to the MSPP RT system (3) with an automatic switching optical network (ASON), Internet network Connected on-demand (BoD) dedicated line service platform (5), which is connected to the client (6) to control the Multi-Service Provisioning Platform (MSPP) system section, the on-demand dedicated line service platform and management server interface ASON management server 2 for controlling the automatic switching optical network (ASON) interval to connect to the TCP / IP socket through to create and delete the VC3 trunk line.

1 is a network configuration embodiment in which the present invention assumes that a plurality of optical line distribution system (OXC) 1 constitutes an automatic switching optical network (ASON) and a separate ASON management server for controlling signaling of ASON ( Has 2).

Multiservice Acceptance Platform (MSPP) section consists of MSPP RT system (3) located on the customer side, MSPP COT system (4) located in the country that connects the MSPP RT system (3) and ASON and the dedicated dedicated line Under the control of the service platform 5. The client 6 connected to the on-demand dedicated line service platform 5 provides a user interface capable of access and line bandwidth modification.

The client 6 accesses the on-demand dedicated line service platform 5 and authenticates and requests bandwidth adjustment of an active line, and the on-demand dedicated line service platform 5 frees a 45M trunk line of an existing ASON section. It utilizes bandwidth to provide bandwidth increase / decrease service in 2M units.

When a customer connects to the leased line service platform 5 through the client 6 and requests an increase in line bandwidth, the on-demand leased line service platform 5 when there is not enough free bandwidth in the existing 45M trunk line. ) Requests the ASON management server 2 to create a new trunk line using the management server service interface 7. In addition, defragmentation is performed after the previously allocated bandwidth is released for the circuit bandwidth reduction request of the customer, and the unused trunk line is canceled by using the management server service interface 7.

2 is an example of a VC12 time slot assignment table present in a VC3 circuit.

The VC3 trunk circuit has a 45 Mbps bandwidth, and the VC12 time slot circuit has a bandwidth of 2 Mbps.

FIG. 2 illustrates a situation in which VC12 2M timeslot allocation of a VC3 45M trunk line provided by an automatic switched optical network (ASON) is performed, and defragmentation is not performed. One trunk circuit consists of 21 VC timeslots, which can be shared and used simultaneously by multiple customers set up in the same direction, and are in use as shown in FIG. 2 after handling bandwidth increase / decrease requests of multiple customers. A situation in which time slots (Used VC12 Timeslot) and free time slots (Free VC12 Timeslot) are scattered may exist.

FIG. 3 shows an example in which a vacant VC3 circuit is generated by defragmenting internal VC12 time slots when there are multiple VC3 circuits.

Figure 3 shows before and after defragmentation when three 45M trunk lines are provided in the same direction. After defragmentation, the third 45M trunk line is free of bandwidth and can return the line bandwidth to an auto switching optical network (ASON).

4 is a flowchart for creating / deleting a VC3 line between MSPP and ASON, and is implemented in the bandwidth-modulated on-demand (BoD) dedicated line service platform 5 shown in FIG. 1 and used for interworking with the ASON management server 2.

4 illustrates an ASON interworking method of the leased line service platform 5 on demand, and using the CR_Threshold value (first threshold) and RM_Thresdhold value (second threshold) to create and delete a new VC3 trunk line to the ASON management server. Have a request.

The CR_Threshold value is a generation threshold of the number of pre-VC12 timeslots (2M) of V3 trunk lines currently set in the corresponding direction. If the number of pre-VC12 timeslots is smaller than the corresponding value, the new trunk line is preset.

The RM_Threshold value is a deletion threshold of the number of 2M timeslots in the trunk lines currently set as the corresponding method. If the number of free 2M timeslots is larger than the corresponding value, the RM_Threshold value releases the unused 45M trunk line after the defragmentation.

The RM_Threshold value is 21 and the number of total VC12 time slots (2 Mbps) of the VC3 trunk line (45 Mbps). It should be determined and operated with a value larger than the sum of CR_Threshold values.

First, the user accesses the BoD dedicated line service platform through the public Internet using the bandwidth control on-demand dedicated line service client in MSPP and ASON network, and checks the user authentication (S20), and the customer corrects the bandwidth of the dedicated line currently in use. If requested (S21), the bandwidth increase / decrease is determined (S22).

If the bandwidth of the existing line is requested, it is determined whether the free VC12 time slot corresponding to the bandwidth required by the customer is available in the VC3 line currently set in the corresponding direction (S23), and enough free VC12 timeslots are provided for the existing VC3 trunk line. If there is enough, the additional VC12 2M time slot of the bandwidth required by the customer is allocated to the customer in the existing 45M VC3 trunk line set in the corresponding direction (S25).

If there are not enough free VC12 timeslots in the existing VC3 trunk circuit, request the creation of a new VC3 circuit to the ASON management server (S24), and create a new VC3 circuit to create a free VC12 2M as much as the additional bandwidth required by the customer. The time slot is allocated to the customer in the existing 45M VC3 trunk line set in the corresponding direction (S25).

After allocating as many VC12 time slots as necessary for the customer, it is determined whether the number of remaining free VC12 time slots is smaller than the CR_Threshold value (S26), and if it is small, the creation of a new VC3 trunk line in the corresponding direction to the ASON management server 2. Request (S27).

The reason why the CR_threshold value is set to always maintain the number of free VC12 timeslots above a certain level is to immediately accommodate the customer's demand for bandwidth increase. If the slot does not exist, the customer's request needs to be delayed until the VC3 trunk circuit creation is complete.

If the existing circuit is required to reduce bandwidth, the VC12 time slot of the existing VC12 time slots allocated to the customer is deallocated as the requested bandwidth and designated as a free VC12 time slot (S28), and in the VC3 circuit set in the corresponding direction If the total number of free VC12 time slots is greater than the RM_Threshold value (S29), the empty VC3 line is deleted by requesting the ASON management server to delete the unused VC3 line after the defragmentation is executed (S30).

The present invention provides an on-demand dedicated line service between subscribers in a network environment consisting of an automatic switched optical network (ASON) subscriber implemented with SONET / SDH technology and a multi-service acceptance platform (MSPP) connecting ASON. The present invention relates to a service method for specifying a signaling scheduling method between the MSPP system and the ASON.

With the introduction of the Optical Line Distribution System (OXC) (1) with an intelligent control plane in the existing optical network structure, which was simply composed of a set of point-to-point transmission links, automatic switching to dynamically perform link service of transmission lines. Optical network (ASON) is realized. The automatic switching optical network (ASON) operates in an external client network and server-client relationship, and the Optical Internetworking Forum (OIF) proposes the O-UNI standard as a service interface. Currently, O-UNI technology plays a signaling role for automatically creating circuits in ASON.

The multi-service acceptance platform (MSPP) system is composed of an MSPP RT system (3) located at the customer side and an MSPP COT system (4) located at the national office, and provides an Ethernet interface to the customer side and provides a virtual concatenation technology (VC). And bandwidth-on-demand (BOD) TDM leased line services through the Link Capacity Adjustment Scheme (LCAS).

On-demand leased line service is a service that utilizes exclusive bandwidth by connecting direct lines between customer sites and can increase or decrease the bandwidth in VC12, that is, 2Mbps units according to customer's request. The increase and decrease of the 2Mbps bandwidth unit is made through Virtual Concatenation (VC) and Link Bandwidth Control (LCAS) in the MSPP system, and this MSPP COT system is connected to an automatic switching optical network (ASON). In general, the bandwidth of a line provided by ASON through signaling is VC3, that is, 45M units, and one VC3 line can provide 21 VC12 bandwidths.

Depending on the customer's real-time bandwidth requirements, the MSPP system will request VC3 circuits from the Automatic Switching Optical Network (ASON) and allocate VC12 bandwidth within the established VC3 circuits to the customer's required bandwidth level.

The present invention specifies an algorithm for VC3 line generation and termination between a multiservice acceptance platform (MSPP) system and an automatic switching optical network (ASON) in an on-demand leased line service provided in the form described above. Provides services efficiently in a network environment consisting of ASON and MSPP.

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

As described above, according to the present invention, in order to provide bandwidth-modulated on-demand leased service in a multiservice accommodating platform (MSPP) and automatic switching optical network (ASON), a BoD leased line service according to a bandwidth increase / decrease request of a customer The platform allows the ASON management server to create and terminate VC3 trunk lines in the ASON section, which is more efficient than setting up the maximum bandwidth that can be requested by customers in the automatic switching optical network (ASON) section. It is effective to provide bandwidth-on-demand dedicated line service that can operate a network.

Claims (8)

Automatic switching optical network (ASON) consisting of multiple optical line distribution systems (OXC), multiple MSPP RT systems located on the customer side, MSPP COT located in the national office to connect the MSPP RT system with automatic switching optical network (ASON) In a method for providing a bandwidth-modified on-demand dedicated line service in a system consisting of a system, an on-demand dedicated line service platform connected to a client through an Internet network, an MSPP including an ASON management server, and an ASON network, Bandwidth Control Access the BoD leased line service platform through the public internet network using the client of the leased line on-demand service to check user authentication, and if the customer requests to modify the bandwidth of the leased line currently used, determine the bandwidth increase / decrease. Doing; If the bandwidth of the existing circuit is requested, allocating the free VC12 time slot as much as the additional bandwidth required by the customer if there are as many free VC12 time slots as the customer requires in the VC3 trunk circuit; If there are not enough free VC12 timeslots in the existing VC3 trunk circuit, requesting the ASON management server to create a new VC3 circuit, creating a new VC3 circuit, and allocating the free VC12 time slots as much as the bandwidth required by the customer; And After allocating as many VC12 time slots as the customer requires, determine if the number of remaining free VC12 time slots is less than the first threshold (CR_Threshold value), and if so, request the ASON management server to create a new VC3 trunk line in that direction. Steps to create a new VC3 trunk line MSPP comprising a, ASON network bandwidth control on-demand dedicated line service providing method. The method of claim 1, If the existing circuit requires bandwidth reduction, the VC12 time slot as much as the requested bandwidth is deallocated among the existing VC12 time slots assigned to the customer and designated as a free VC12 time slot, and all free VC12 in the VC3 circuit set in the corresponding direction. If the number of time slots is greater than the second threshold (RM_Threshold value), requesting deletion of the unused VC3 circuit after defragmentation to request ASON management server to delete the empty VC3 circuit. In the MSPP, ASON network comprising a further bandwidth control on-demand dedicated line service providing method. The method according to claim 1 or 2, If the number of free VC12 time slots is smaller than the first threshold value (CR_Threshold value), a new VC3 trunk line is generated by requesting generation of a VC3 trunk line to the ASON management server in advance, and a free VC12 time than the second threshold value (RM_Threshold value). If the number of slots is larger, after the defragmentation enforcement to delete the unused VC3 trunk line by requesting the ASON management server to delete the VC3 trunk line, MSPP, ASON network bandwidth providing on-demand dedicated line service providing method. The method of claim 1, The first threshold (CR_Threshold value) is a generation threshold of the number of pre-VC12 timeslots of the VC3 trunk lines currently set in the corresponding direction, and if the number of pre-VC12 timeslots is smaller than the corresponding value, the new trunk line is preset. How to provide bandwidth control on-demand dedicated line service in MSPP, ASON network. The method of claim 2, The second threshold value (RM_Threshold value) is a deletion threshold of the number of VC12 timeslots in the VC3 trunk lines currently set as the corresponding method. Method of providing a bandwidth control on-demand dedicated line service in the MSPP, ASON network, characterized in that the release. The method of claim 2, The second threshold (RM_Threshold value) is the number of total VC12 time slots that the VC3 trunk circuit has. The bandwidth control on-demand dedicated line service providing method in the MSPP, ASON network, characterized in that the operation is determined to be greater than the sum of the first threshold (CR_Threshold value). The method according to claim 1 or 2, The ASON management server is connected to a TCP / IP socket via an on-demand dedicated line service platform and management server interface connected to an external client to automatically create and delete VC3 trunk lines for multiple optical line distribution systems (OXCs). (ASON) A method for providing bandwidth-modified on-demand dedicated line service in a MSPP, ASON network, characterized in that to provide on-demand dedicated line service by controlling the bandwidth between subscriber end by controlling the interval. The method according to claim 1 or 2, The multi-service acceptance platform (MSPP) system is composed of an MSPP RT system located at a customer side and an MSPP COT system located at a national company, providing an Ethernet interface to a customer side, a virtual concatenation technology (VC) and a link bandwidth control technology. (Bandwidth-on-Demand, BoD) TDM dedicated line service through the Link Capacity Adjustment Scheme (LCAS).

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