KR20030092260A - A Premises Communication Management System with The Functionalities of Notifying Subscriber Gateway Ethernet Switches and Service System capable of Bandwidth Management by using WAN Que and Local Que - Google Patents

Abstract

PURPOSE: A system having a LAN(Local Area Network) gate and a department communication management server for providing a LAN-type Internet connection service is provided to dynamically manage a WAN(Wide Area Network) interval traffic according to a connection state and have the maximum transmission speed with respect to a traffic in a department of a LAN interval. CONSTITUTION: A department communication management server(10) has a bandwidth management subsystem(10-3). The bandwidth management subsystem(10-3) manages an IP address and MAC(Media Access Control) address list of a service server in a department, and distributes the IP address and MAC address list to LAN gates. The bandwidth management subsystem(10-3) monitors the WAN interval upstream traffic quantity and downstream traffic quantity of an edge router, and monitors the subscriber connection present state in a corresponding time. The bandwidth management subsystem(10-3) calculates a predetermined subscriber-classified bandwidth management quantity and a bandwidth management quantity according to WAN interval data or data in the department on the basis of monitored information, and instructs the corresponding LAN gate(16n) to manage a bandwidth. The LAN gate(16n) has a bandwidth management module(16-2). The bandwidth management module(16-2) judges whether data received in the LAN gate(16n) are the data in the department or the WAN interval data, and manages the bandwidth of upstream or downstream data of the data in the department or the WAN interval data according to the judged result.

Description

A system that provides a LAN-type Internet access service having a LAN gate that manages band whistle by separating traffic according to a LAN section and a complete section, and a communication management server only. A Premises Communication Management System with The Functionalities of Notifying Subscriber Gateway Ethernet Switches and Service System capable of Bandwidth Management by using WAN Que and Local Que}

The present invention relates to a LAN type Internet access service that provides Internet access to a large number of small subscribers using an on-premises LAN, wherein traffic in a complex between a small subscriber Ethernet station and a service server in the complex and a wide area network (WAN) section are provided. The present invention relates to a LAN-type Internet access service providing system including a LANG and a communication management server that dynamically manages a band whistle by classifying traffic. In this context, a LAN type Internet access service using an on-premises LAN refers to the introduction of inexpensive large-capacity Internet leased lines into the complex, which is then connected to the on-premises LAN environment to finally provide Internet services to users who are connected to the on-premises LAN, that is, many small subscribers. it means.

Until now, most homes or businesses have been provided with Internet access services through a digital subscriber line (DSL) method using copper telephone lines or a data over cable service interface specification (DOCSIS) method using a cable of a cable TV. However, these methods have already reached their limits in terms of cost / rate. If you pay about 20,000 won ~ 30,000 won per month, the service is about 0.3Mbps to 2Mbps.

However, with the recent advancement of transmission technologies such as Metro Ethernet, which directly transfers Ethernet frames on optical fibers, and IP / Fiber, which transmits IP packets on optical fibers, the price of high-capacity leased lines has increased. It is falling exponentially. For example, Metro Ethernet-based 10Mbps dedicated line has been supplied to PCBang in Korea in early 2002 for less than KRW 1 million per month, compared to T1 (1.544 Mbps) of Synchronous Optical Network (SONET) just a year ago. In other words, it is only about one tenth of the price in terms of transmission speed to cost. This cost-to-rate improvement is expected to be more than 10 times better in the near future. That is, it is expected to be about 100 times better than the transmission rate compared to the cost in 2001.

On the other hand, as is evident in the "high-speed information and communication building certification system" led by the Ministry of Information and Communication, it is becoming common to set up a local LAN from the beginning when building apartments or office buildings. As a result, inexpensive high-capacity leased lines are introduced to the complex, and the LAN is directly connected to the complex to provide Internet access services for a large number of mutually independent small subscribers in the complex at a cost of 20,000 won to 30,000 won per month. It is becoming common.

In the case of the Internet access service through the LAN in the premises, high speed internet service of tens of Mbps is possible by using only general-purpose Ethernet switch without using expensive communication equipment. The method is hardly a competitor.

By the way, LAN is not a communication protocol originally developed for the purpose of mutually independent small subscriber access to the Internet, but a flat protocol developed to connect a plurality of users in the same organization and the same office. Therefore, the concept of bandwiss management for each subscriber is a weak communication method. In practice, for example, if some subscribers preempt high-traffic services, such as FTP downloads, the other subscriber's transfer rate will slow down.

For medium-large subscribers who pay more than one hundred thousand won to one hundred thousand won per month, such as PC rooms or midsize businesses, and use the Metro Ethernet leased line, in terms of "Ethernet", "Internet service for many small subscribers through local LAN" and In some cases, the same Ethernet, the Metro Ethernet dedicated line is provided and used. In this case, the transmission speed is guaranteed to be constant from 10 Mbps to 100 Mbps or more, depending on the subscriber line "thickness".

However, in apartments and general large officetels, the subscribers consist of a large number of small independent subscribers who pay between 20,000 and 30,000 won per month, rather than medium and large subscribers who pay more than several hundred thousand won per month. Rather than being delivered directly to subscribers, it is divided into hundreds of subscribers via an on-premises LAN consisting of a general purpose Ethernet switch.

In such an environment, when a method of limiting transmission rates for each subscriber port is used, a situation arises in which all are miserable. For example, suppose a 100-Mbps leased line enters an apartment complex where 1,000 households have 100 households per building and 10 households per floor. Evenly dividing, we will allocate 10 Mbps per switch, 1 Mbps per floor switch, and 0.1 Mbps per subscriber, a separate port of the floor switch. Even if the ISP includes the usual multiplier of 10, it is only 1 Mbps for each layer switch port connecting 1 subscriber. This multiplier comes from an empirical fact that, even in the busiest times, 40% of all subscribers use the Internet and 25% of them download data. In other words, in case of managing port whistle for each port, everyone becomes miserable evenly.

As discussed above, in a LAN-type internet connection, fixed band-wiss service quality should be managed as a dynamic band-wiss. That is, when a large number of subscribers are connected, they should be used little by little, and when there are few connected subscribers, they should be used as much as possible within the range of use.

In addition, the bottleneck to manage band whistle in the local area network is not just traffic but WAN traffic. Ethernet switch devices within the complex are so fast-to-price that they don't require band-wiss management. In particular, when implementing a service server in a complex such as a high value-added content server or a home shopping server, the traffic within the complex must be exempted from band whistle management or weakened.

However, the current situation is for WAN section traffic, while managing the band whistle dynamically by "spreading the width of the band whistle when it is crowded, ie, reducing the width of the band whistle when there are a large number of users, and widening its width when it is not crowded". There is no dual-mode bandwiss management system that is as "relaxed" as possible.

Accordingly, an object of the present invention is to provide a LAN-based Internet that enables dual mode band whistle management to dynamically manage WAN traffic in accordance with a connection state and maximum transmission speed for traffic in a complex within a LAN. It is to provide a connection service providing system.

Figure 1 shows a schematic diagram of a premises LAN with a number of small subscribers in a complex receiving a LAN type internet access service according to the present invention.

FIG. 2 shows a data flow chart in which bandwidth management is performed in a LAN type Internet access service system using the present invention.

3 is a flowchart illustrating a process of dynamically managing band whis using a gateway switch and a communication management server of the present invention.

In order to achieve the object of the present invention, upstream data destined for an IP or MAC address that is not included in the server list of the LANgate installed in each subscriber provided for LAN type internet access, and not included in the server list of the complex Classify the downstream data whose IP or MAC address is not the source as WAN interval traffic, and classify the IP or MAC address included in the server list as the only traffic within the destination or source stream data. The management server works properly with the LANGATE, allowing the LANGATE to adjust to the bandwidth management amount indicated by the communication management server at any time for WAN section traffic, and in other ways, as soon as possible for traffic within the complex. Configure to send The.

Specifically, an edge router connected to the Internet, a main switch connected to the edge router, sub-switches of a hierarchical forming structure under the main switch, a plurality of gateway switches connected to the sub switches, a plurality of connected to each of the plurality of gateway switches An Internet access service providing system comprising a small subscriber Ethernet station in a complex, a terminal communication management server controlling a plurality of gateway switches, and a service server in a complex that communicates within the complex to a plurality of small subscribers via a main switch. On the management server, it maintains a list of IP addresses and / or MAC addresses of only my service server and distributes them to the gateway switches, and monitors the amount of upstream traffic and downstream traffic over the WAN edge of the edge router, while at the same time subscriber access. Monitor current status Calculating a bandwidth management amount corresponding to the information previously set by a subscriber bandwidth management amount or the WAN or semi-data based on the samples to provide a bandwidth management subsystem for instructing the Swiss band management in the gateway switch. In addition, the gateway switch communicating only with the communication management server is based on information provided by the service server address list module in the complex of the communication management server. Determining the, and includes a band whistle management module for managing the band whistle of the data upstream / downstream of the data within the complex or WAN section in accordance with the determination result.

Here, in the bandwiss management module, whether the data in the complex or the data in the WAN section is upstream data, if the destination address is included in the address list of the service server only provided by the communication management server, the queue is in the upstream complex queue. If it's not on my service server's list, it's in the WAN span queue; if it's downstream, it's just in my queue if the source address is on my service server's list, and if it's not on my service server's list, it's only on the WAN span queue. It is determined by judging that it is piled up in.

On the other hand, only the communication management server receives IP address assignment to the LAN gate management sub-system and the plurality of small subscriber Ethernet stations that report the current status of connection of the multiple small subscriber Ethernet stations through the LAN gate and manage the gateway switches remotely. It may further include a DHCP subsystem.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. 1 shows an example of a typical LAN-based Internet access service for multiple small subscribers in a complex. FIG. 2 illustrates an interaction process between the bandwidth management module on the LANG side and the bandwidth management sub-system on the communication management server side for the bandwidth management.

The system for the Internet access service using the local area network (LAN) includes the edge router 9, the communication management server 10, the Ethernet switches 12, 14a, 14b, 14c forming a hierarchical shaping structure, the LAN gate 16a, 16b 16c, 16d, 16e, 16f, 16g, 16h, 16i), subscriber Ethernet station (e.g. PC; 18a, 18b 18c, 18d, 18e, 18f, 18g, 18h, 18i) and the like. Among them, the edge router 9 and only the communication management server 10 exist in the central MDF room in the case of the apartment, and the Ethernet switches 12, 14a, 14b, 14c forming the hierarchical forming structure are the central MDF. It will be located on each floor of each building. The LAN gates 16a, 16b 16c, 16d, 16e, 16f, 16g, 16h, 16i are located inside the subscriber "home", where the data lines are introduced, and connect the "inside the house" and the "outside the house". Will be Subscriber Ethernet stations can be located anywhere in the home, in the living room, in the kitchen, in the kitchen, in the study room.

On the other hand, since the LAN is built in the premises, in addition to receiving Internet service using the same, only the LAN high-speed communication is carried out in the complex, and only a predetermined number of speeds of several Mbps and largely 10 Mbps or more are provided from the service server 7 in the complex. You can get the service. The service server 7 in the complex includes a VoD server, an education server, a home shopping server, a VoIP gateway server, and the like, and may be installed in a central MDF in which the main switch 12 is located.

On the other hand, the communication between only the service server 7 and the subscriber Ethernet station 18a-i is performed independently without any influence on the communication in the WAN section through the large-capacity leased line 8 such as the Ethernet. And because the bottleneck occurs to manage the band whiskey as described above, the traffic in the WAN section, it is preferable that the management of the traffic only within the complex by the LAN communication within the management rather than do not relax or manage. Therefore, it is necessary to dualize the band whistle management, and for this purpose, as shown in FIG. 2, only the communication management server 10 includes the band whistle management sub-system 10-3 to the LAN gate 16. Band whisker management module 16-1 is built-in to manage the band whiss dually. On the other hand, only the communication management server 10 is connected to the DHCP sub-system (10-1) for granting the IP address required for Internet access and the subscriber Ethernet station (18a-i) connected to a plurality of LAN gates (16a-i) installed for each subscriber. LAN gateway 16a-i management subsystem 10-2 for receiving and reporting the connection status of the network) and remotely managing and manipulating the gate.

Now, the dual management of the band whistle according to the present invention will be described in detail through the configuration and operation of the band whistle management subsystem 10-3 and the band whistle management module 16-1. The band management subsystem 10-3 of the communication management server 10 only includes the service server address list 10-3a, the subscriber service class list module 10-3b, and the monitoring module 10-3c. And a bandwidth management amount indicating module 10-3d for each gate.

In only the service server address list module 10-3a, the IP address and / or MAC address of the service server 7 only is recorded / stored. Preferably, the service operator enters this list. This list doesn't change very often. This list is immediately distributed to the gates 16a-i whenever it is updated.

In the subscriber service grade list module 10-3b, the service grade information of the subscriber is recorded / managed for each subscriber. Service providers may assign several classes of service to their subscribers. For example, one subscriber may be offered a product that guarantees a minimum of 1 Mbps downstream of the WAN section, and the other guarantees a minimum of 0.5 Mbps. If there is a change in class, there will be a difference in the allocation of bandwiss.

The monitoring module 10-3c communicates with the edge router 9 to monitor the amount of upstream traffic and downstream traffic of the WAN section leased line coming into the complex, while communicating with the LAN gate management subsystem 10-2. Understand the subscriber access status.

In addition, the bandwidth management amount per module for the gate gateway 10-3d is based on the monitoring result of the monitoring module 10-3c and the contents of the subscriber class list module 10-3b. Then, four kinds of queue whistle management amounts are calculated for each cue, and the LAN gates 16a-i are instructed to manage band whistle. Here, the four types of queues are queues in an upstream complex indicating when the data reaching the LAN gate originate from the subscriber Ethernet station, and the data reaching the LAN gate originates from the subscriber Ethernet station. Upstream WAN section queue to indicate when it has a destination beyond the Internet outside the complex, the queue within the downstream complex to indicate when the source has reached the subscriber Ethernet station and has a source within the complex to reach the subscriber Ethernet station. A downstream WAN span queue that indicates when a piece of data is destined for a subscriber Ethernet station and has just outside the source over the Internet.

For example, a 100 Mbps entry into a complex and a total of 500 subscribers, of which 100 are premium-class customers and 400 are moderate-class customers, and at one point, 50 of all subscribers are accessing the WAN over the Internet. Let's say 5 subscribers are premium and 45 subscribers are normal. In the case of the downstream within the WAN interval, when statistically indicating 'no restriction', the subscriber occupies 30 Mbps of bandwidth at any moment and the multiplier is 10. Applying `` no limit '' to premium customers will consume 30 x 5 x 1/10 = 15 Mbps of bandwidth. For the remaining 45 ordinary subscribers, the 'no limit' would be 45 × 30 × 1/10 = 135 Mbps, which would be 150 Mbps overall, exceeding the band whiskers entering the complex. In this case, the administrator can direct the management amount to "10 Mbps" for 45 ordinary subscribers. It becomes 45 * 10 * 1/10 = 45Mbps, and the total amount becomes 60Mbps. That is, after considering the multiplier, the total sum of bandwives per subscriber should be smaller than the overall bandwiss, and the bandwiss management is differentiated according to the service terms and conditions among the subscribers. In the above case, let's say that the number of access subscribers is gradually increased to 200. On average, the maximum allowable management amount is 100/200 × 10 = 5 Mbps per subscriber. Suppose 50 of them are premium and 150 are regular subscribers, and the ISP's policy is that the difference in bandwidth management between premium and regular subscribers is 1.5: 1 with 40% of all subscribers connected. In general, assuming that the subscriber's bandwidth management amount is x, it is X x 150 x 1/10 + 1.5 x X 50 x 1/10 = 100. In other words, the subscriber's LANGate should be instructed to have a downstream management amount of 4.44 Mbps and the premium subscriber's LANGate should be instructed to have a downstream management amount of 6.66 Mbps. On the other hand, each service provider will have a different input input variable of the bandwiss management amount calculation function, and the parameter value of the variable of the function will be variously modified.

On the other hand, the band whistle management module 16-2 of the LANGATE 16a-i includes the upstream bandwidth management submodule 16-2a, the downstream bandwidth management submodule 16-2b, and only the service server list in the network. It consists of the submodule 16-2c and the packet / frame classification submodule 16-2d.

The only service server list submodule 16-2d of the service server 7 in the complex is controlled from the band management subsystem 10-3 of the communication management server 10 through the control communication module 16-1. Obtain and manage a list of IP addresses and / or MAC addresses. The packet / frame classification submodule 16-2c only looks at the destination IP address or destination MAC address for upstream data and the source address for downstream data based on the IP address or MAC address of the service server 7 in the service. By looking at the IP address or the source MAC address, it is determined whether the data is just data received from the band management subsystem 10-3 of the communication management server 10, thereby distinguishing whether it is traffic within the complex or WAN section traffic. As a result, the traffic of the upstream data and the downstream data is accumulated in the upstream queue, the upstream WAN section queue, the downstream complex queue, and the downstream WAN interval queue.

The upstream bandwidth management submodule 16-2a and the downstream bandwidth management submodule 16-2b are only four types of queues from the bandwidth management subsystem 10-3 of the communication management server 10 from time to time. QUE) Known scheduler algorithms such as constant bit rating (CBR) and weighted fair queing (WFQ) built into these band whistle management sub-modules 16-2a and 16-2b. The speed is adjusted according to the band whistle management guidelines, and the data is sent from the queue. That is, the band whisper management is instructed to the rangate.

For example, suppose that data is pushed to 10 Mbps from a WAN section to a LAN gate, and the management amount of the WAN section downstream managed by the LAN gate is 5 Mbps. Sooner or later, the LANgate's buffer overflows, and according to the FIFO (First-in-first-out) principle, later arriving Ethernet frames are discarded.

On the other hand, OSI 4th layer protocols include TCP and UDP. In the case of TCP, data transmission speed is slow when the receiver side does not respond with an ACK (ACK) acknowledgment (ACK). Therefore, when the gates 16a-i discard data in the middle, the data transfer rate is slowed down. This decreases the speed of the WAN section data entering the complex for this subscriber, resulting in only that much margin over the entire WAN segment, which is then allocated to other subscribers.

In the case of UDP, there is no acknowledgment message. However, since most UDP transmission servers have a function of measuring the transmission speed of each receiving party and adjusting the amount of data to be transmitted to the other party, when the LAN gates 16a-i discard data in the middle, UDP transmission server will reduce the transmission speed for this subscriber. This means that the speed of the WAN section data entering the complex for this subscriber will be reduced, resulting in only enough margin over the entire WAN section, which is then allocated to other subscribers.

Therefore, a plurality of subscribers can be used to be fairly allocated the band whistle of the WAN interval. On the other hand, when communicating with the service server 7 in the complex using the LAN in the complex separately from the Internet access service in the WAN section, since the throughput of the Ethernet switch in the complex is sufficient, the management guidelines for the two queues in the complex are ' It can be set to 'unlimited' to maximize the transmission speed.

Referring to FIG. 3, the interaction between the communication management server 10 having the band whistle management subsystem 10-3 and the LAN gate 16a-i having the band whistle management module 16-2 is illustrated. In summary, it is as follows.

The LAN gates 16a-i drive the packet / frame classification submodule 16-2c and the service server list submodule 16-2d in the jar, so that the MAC address or IP address of the packet / frame containing the data arrived. And compares the MAC address or IP address of the service server only with one another to classify the packet / frame of the received data into one of four queues (S1). If the received data is upstream data, the source MAC address or IP address is compared with the MAC address or IP address of the service server only.In the case of downstream data, the source MAC address or IP address and the MAC address of the service server or By comparing the IP addresses, if the MAC address or IP address being examined is only included in the MAC address or IP address of my service server, it is classified only as an upstream queue or a downstream queue, otherwise it is an upstream queue in the WAN interval. Or as a downstream queue.

Next, the upstream band whistle management submodule 16-2a and the downstream band whistle management submodule 16-2b only store the data accumulated in the queue according to the band whistle management amount per queue or per gate to be delivered from the communication management server. By exporting (scheduling), the speed of scheduling changes according to the band whisper management. In case of upstream or downstream only, there is little need to manage band whistle, so there is almost no change in speed of data passing through the gate. On the other hand, in the case of the downstream or upstream within the WAN interval, it is possible to adjust the data pass rate by adjusting the degree of band whiss management according to the access situation of the subscriber (S2).

In the LAN-type internet access according to the present invention, the subscriber uses the service server in the complex by using the high-speed communication that can be provided by the local LAN facility, and for the WAN section connection, based on the instantaneous connection status and the subscriber's service grade. Fair and dynamic, bandwiss can be assigned.

Claims (3)

An edge router connected to the Internet, a main switch connected to the edge router, sub-switches of a hierarchical forming structure under the main switch, a plurality of gateway switches connected to the sub switches, and connected to each of the plurality of gateway switches. An Internet access service providing system comprising a plurality of small subscriber Ethernet stations, a complex communication management server controlling the plurality of gateway switches, and a service server in the complex communicating within the complex to the plurality of small subscribers via the main switch. In The complex communication management server maintains and distributes the IP address and / or MAC address list of the service server in the complex to the gateway switches, and monitors the amount of upstream traffic and downstream traffic of the WAN router of the edge router. By monitoring the current status of subscriber access at the time, and calculating the band whistle management amount according to the preset subscriber's band whistle management, WAN section data or the data in the complex based on the monitored information, band whiss management is applied to the corresponding gateway switch. Includes a indicating band management subsystem, The gateway switch determines whether the data reached by the gateway switch is data in the complex or data in the WAN section based on the list of service servers in the complex provided by the communication management server. And a bandwidth management module that manages bandwidth of data within the complex or upstream or downstream of the data of the WAN section. The method according to claim 1, wherein in the band management module, whether the data in the complex or the data in the WAN section is upstream data, if the destination address is included in the address list of the service server in the complex provided by the complex communication management server. In the upstream complex in the queue, in the WAN interval queue if not in the list of the service server only, in the queue only if the source address is in the list of the service server in the downstream case; If it is not included in the list, the Internet access service providing system is determined by determining that it is accumulated in the WAN section queue. The LAN management management system and the plurality of small subscribers of claim 1, wherein the communication management server merely reports a connection status of the plurality of small subscriber Ethernet stations through the LAN gate and remotely manages the LAN gates. A system for providing Internet access services further comprising a DHCP subsystem for assigning IP addresses to Ethernet stations.