KR101595944B1 - System and method of bandwidth management for increasing bandwidth utilization efficiency - Google Patents

Abstract

The present invention relates to a system and a method for managing a bandwidth to increase the bandwidth utilization efficiency. To manage a bandwidth, the system for managing a bandwidth confirms control conditions based on signals transmitted from a plurality of terminals, to determine whether the transmission speed of a frame to be managed to transmit to the terminals needs to be changed, based on the control conditions; determines whether a connection acceptance range for a new terminal requesting service needs to be changed when the transmission speed is determined to be changed, and transmits the frame to be managed to the terminals at a changed transmission speed when the connection acceptance range is determined to be changed.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a bandwidth management system and a bandwidth management system,

The present invention relates to a bandwidth management system and method for increasing bandwidth utilization efficiency.

Recently, with the development of information and communication technology, many users are receiving services through various wireless communication technologies. However, in the case where a large number of users are in a WiFi service area (for example, in a subway station or a subway) that allows a service to be used through a WiFi, that is, a standardized no method.

Accordingly, it is necessary to physically expand the Wi-Fi service area, to limit the bandwidth allocated to each user, or to distribute the bandwidth fairly by distributing users between access points (APs) through the controller, . However, the high density user environment is characterized in that a large amount of connection requests occur instantaneously, and in such an environment, a new bandwidth utilization efficiency alternative is required.

Accordingly, the present invention provides a system and method for increasing bandwidth utilization efficiency in high density WiFi user areas.

According to an aspect of the present invention, there is provided a system for managing bandwidth,

A signal receiving / processing unit receiving a signal transmitted from a plurality of terminals and restricting connection requests according to preset conditions; A terminal information storage unit for receiving and storing the terminal function from a signal including the terminal function information among the signals received by the signal receiving / processing unit; Managing a bandwidth for providing a service to the plurality of terminals via a Wi-Fi network, controlling a transmission rate of a management object frame to be transmitted to the plurality of terminals based on management conditions, and adjusting a connection acceptance range of a new terminal requesting a service A bandwidth manager for determining whether the mobile terminal is a mobile terminal; And a signal transmission unit for transmitting a management object frame to a plurality of terminals at a transmission rate adjusted according to the transmission rate control result determined by the bandwidth management unit.

The management conditions include whether the number of attempts by the terminal that has entered the WiFi service area formed by the access device is equal to or greater than a preset number of attempts to connect the terminal per unit time and whether the average traffic processing rate of the connected terminals is lower than a preset reference processing rate Can be used.

The signal receiving / processing unit, when receiving the probe request message transmitted from the terminal, calculates a received signal strength of the signal including the received probe request message based on the connection acceptance range adjusted by the bandwidth manager, , The probe request can be restricted.

According to another aspect of the present invention, there is provided a bandwidth management method for a bandwidth management system,

Confirming a management condition based on a signal transmitted from a plurality of terminals; Determining whether to change a transmission rate of a management object frame to be transmitted to the plurality of terminals based on the management condition; Determining whether to change a connection acceptance range for a new terminal requesting a service if it is determined that the transmission rate should be changed; And transmitting the management object frame to the plurality of terminals at a transmission rate changed when confirming that the connection acceptance range should be changed.

Determining a transmission rate of the management object frame by using a transmission rate control algorithm applied to the data frame in the step of determining whether to change the connection acceptance range, The transmission speed can be determined.

According to the present invention, additional bandwidth can be ensured through a terminal connection procedure without additional physical equipment.

In addition, since the service area adjustment is based on the received signal strength of the probe request signal, the maximum transmittable speed can be maintained.

1 is an exemplary diagram illustrating an environment in which a bandwidth utilization efficiency increase method according to an embodiment of the present invention is applied.
2 is a structural diagram of a bandwidth management system according to an embodiment of the present invention.
3 is a flowchart of a bandwidth management method according to an embodiment of the present invention.
4 is an illustration of a transmission rate function operation in accordance with an embodiment of the present invention.
5 is an exemplary diagram of a change of a connection acceptance range according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

In this specification, a terminal includes a mobile station (MS), a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS) An access terminal (AT), and the like, and may include all or some of functions of a mobile terminal, a subscriber station, a mobile subscriber station, a user equipment, and the like.

In this specification, a base station (BS) is an access point (AP), a radio access station (RAS), a node B, a base transceiver station (BTS) Mobile Multihop Relay) -BS, and may include all or some of the functions of an access point, a radio access station, a Node B, a base transceiver station, and an MMR-BS.

Hereinafter, a method of increasing bandwidth utilization efficiency according to an embodiment of the present invention will be described with reference to the drawings.

1 is an exemplary diagram illustrating an environment in which a bandwidth utilization efficiency increase method according to an embodiment of the present invention is applied.

As shown in FIG. 1, a plurality of terminals 200-1, 200-2, and 200-3 are connected to an access device 100 forming a Wi-Fi service area, and use the service through Wi-Fi. In the embodiment of the present invention, the first terminal 200-1, the second terminal 200-2, and the third terminal 200-3 connect the terminal to the connection device 100 and use the service through the Wi-Fi However, the present invention is not limited thereto.

In this case, when the WiFi service area is a region in which a large amount of connection requests can be temporarily generated by the terminal, such as a subway station or a square open to the general public (for example, a railroad, a subway station, etc.) It is necessary to increase the bandwidth utilization efficiency. To this end, a system 300 for managing bandwidth is included in the access point 100, and the structure of the bandwidth management system will be described with reference to FIG.

2 is a structural diagram of a bandwidth management system according to an embodiment of the present invention.

2, the bandwidth management system 300 includes a signal reception / processing unit 310, a terminal information storage unit 320, a bandwidth management unit 330, and a signal transmission unit 340.

The signal receiving / processing unit 310 receives signals including various messages transmitted from the plurality of terminals 200-1 to 200-3. Here, the messages include a probe request message, an authentication message, a connection request message transmitted from a plurality of terminals 200-1 through 200-3, and a Dynamic Host Configuration Protocol (DHCP) do. The functions of these messages are already known, and the detailed description will be omitted in the embodiment of the present invention, and messages transmitted from the terminal to the access device not mentioned above may also be included.

If the bandwidth management unit 330 has already adjusted the access acceptance range based on the management condition, the signal reception / processing unit 310 may receive a new probe request message when the signal strength of the received probe request message is Limits the probe request if it is less than the pre-allowed received signal strength.

The terminal information storage unit 320 extracts and stores the terminal capability information included in the connection request message. Here, the terminal function includes information such as a transmission rate supported by the terminal, whether or not the multiple stream is supported, and the like.

The bandwidth management unit 330 manages bandwidths for providing services to terminals through Wi-Fi. And determines whether to control the transmission rate of the management object frame or the reception range of the terminal. If it is determined that the transmission rate of the management object frame is to be controlled, the transmission rate to be controlled is determined. The transmission rate control algorithm for the transmission rate control algorithm is already known, and a detailed description thereof will be omitted in the embodiment of the present invention.

Here, in order to determine whether to control the transmission rate of the management object frame or the access acceptance range of the terminal, the bandwidth management unit 330 confirms the following management conditions. In the embodiment of the present invention, if the number of connection attempts of the terminal per unit time in the Wi-Fi service area formed by the access point 100 is equal to or greater than a predetermined number, or if the average traffic throughput of the connected terminals is less than a preset reference throughput Whether it is falling or not.

For this, the bandwidth management unit 330 manages information such as the number of received probe requests per unit time, average user traffic throughput, allowed received signal strength information, and transmission rate per frame, and confirms management conditions based on the information.

When the bandwidth management unit 330 speeds up the transmission rate of the management object frame based on the management condition, the signal transmission unit 340 transmits the signal to the terminals 200-1 to 200 -3).

A method of managing bandwidth using such a bandwidth management system will be described with reference to FIG.

3 is a flowchart of a bandwidth management method according to an embodiment of the present invention.

3, the bandwidth management unit 330 of the bandwidth management system 300 checks the management conditions based on the signals transmitted from the terminals 200-1 to 200-3 (S100) It is determined whether it is necessary to change the frame transmission rate (S110).

That is, the bandwidth management unit 330 determines whether the average traffic throughput of the terminals connected in the Wi-Fi service area formed by the access point 100 is lower than a predetermined reference throughput, whether the number of probe requests per unit time is greater than a preset number .

This is because if a high-density WiFi user area according to the present invention is concentrated in a place where a user is concentrated at a corresponding place in a commute time zone, a special day, or a special time zone, and a terminal desiring to receive a service using WiFi is concentrated, It is necessary to secure bandwidth for traffic. Therefore, as described in step S110, the management condition is reviewed to change the management target frame transmission rate or change the reception range of the Wi-Fi connection of the terminal, thereby securing a bandwidth for real user traffic.

If it is determined that the degree of change is not sufficient, step S100 is continuously performed. However, if it is confirmed that the management target frame transmission rate should be changed, the bandwidth management unit 330 checks whether there is a need to change to the access acceptance range (S120). This is for the case where it is judged that it is difficult to handle a service request which is pushed only by changing the frame transmission rate. If it is confirmed that there is no need to change the connection acceptance range, the signal transmitting unit 340 changes the transmission rate of the management object frame and transmits a signal to the terminal (S130).

However, if it is determined that it is necessary to change to the access acceptance range, the bandwidth management unit 330 not only changes the transmission rate of the management subject frame, but also changes the connection acceptance range for allowing additional access, (S140).

In the embodiment of the present invention, an additional consideration is given to the connection acceptance range after changing the frame transmission rate, but either one of them may be considered, or both may be considered at the same time. Here, an example of changing the frame transmission rate will be described with reference to Fig. 4, and a change of the connection acceptance range will be described with reference to Fig.

FIG. 4 is a diagram illustrating an example of a transmission rate function operation according to an embodiment of the present invention, and FIG. 5 is an exemplary diagram illustrating a change in a connection reception range according to an embodiment of the present invention.

First, as shown in FIG. 4, when the connection apparatus 100 transmits a management object frame to a plurality of terminals 200-1 to 200-3, the signal is generally transmitted at a speed of 1 Mb / s, which is the lowest speed. Herein, the term "management target frame" refers to a frame to be transmitted from the access device to the terminal, a frame used in a connection procedure in which the terminal accesses the access device, an IP address allocation procedure and ARP (Address Resolution Protocol) (RTS / CTS: RTS / CTS) transmitted when a broadcast data frame or a data frame retransmission reference count used or a data size larger than a preset reference data size is transmitted.

The transmission speed of these managed frames can be increased from the lowest speed to an appropriate level, and can be quickly transmitted to reduce the wireless occupancy time, thereby ensuring bandwidth for actual user traffic transmission. To this end, the bandwidth manager 330 determines the transmission rate of the management object frame through the following three methods.

The first is to determine the transmission rate of the managed frame according to the capability of the terminal. This determines the transmission rate of the management object frame based on the information on the transmission rate supported by the terminal or the information on whether or not the multiple stream is supported, which is stored in the terminal information storage unit 320, .

The second is to determine the optimal transmission rate by applying the transmission rate control algorithm applied to the data frame. The transmission rate control algorithm is already known, and a detailed description thereof will be omitted in the embodiment of the present invention.

The third is to transmit the broadcast frame used for IP allocation and the like stably to all the access terminals and transmit the lowest frame rate of all the terminals connected at the transmission time.

As shown in FIG. 4, assuming that data is transmitted from the connection apparatus 100 to the first terminal 200-1 at a rate of 130 Mb / s, the management target frame is basically transmitted at a rate of 1 Mb / s I suppose. It is assumed that the access point 100 transmits data to the second terminal 200-2 at a rate of 86 Mb / s and the management object frame transmits at a rate of 1 Mb / s. Finally, it is assumed that the access point 100 transmits data at a rate of 14 Mb / s to the third terminal 200-3 and transmits a management object frame at a rate of 1 Mb / s.

At this time, when it is determined that it is necessary to adjust the transmission rate of the management object frame, the bandwidth management unit 330 of the access point 100 determines the transmission rate of the management object frame using any one of the three methods described above I suppose. At this time, a rate of 130 Mb / s is transmitted to the first terminal 200-1, a rate of 86 Mb / s is transmitted to the second terminal 200-2, and a rate of 14 Mb / s is transmitted to the third terminal 200-3 It is assumed that it is decided to transmit the management object frame to the management object frame.

It is also assumed that the management object frame broadcasted to the plurality of terminals 200-1 to 200-3 is determined to be transmitted at a rate of 14 Mb / s, which is the lowest rate of the connected terminals. Then, since the managed frames are transmitted at a speed faster than the existing 1 Mb / s, the managed frame is transmitted and the remaining resources are used for the traffic bandwidth of the real user.

It is assumed that the transmission rate of the management target frame is reduced and the reception coverage is reduced. Then, as shown in FIG. 5, the connection apparatus 100 reduces the connection acceptance range from the originally allowed connection to the first terminal 200-1 to the second terminal 200-2, 1 request for a new connection request at the location of the first terminal 200-1 and allows only a new connection attempted from the location of the second terminal 200-2 to provide a service. The method of reducing the connection acceptance range and the degree of setting of the range can be variously set, and therefore, detailed description thereof will be omitted in the embodiment of the present invention.

The transmission rate or the access range of the controlled object frame is returned to the original state when the bandwidth of the actual user's traffic is limited.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (8)

A system for managing bandwidth,
A signal receiving / processing unit receiving a signal transmitted from a plurality of terminals and restricting connection requests according to preset conditions;
A terminal information storage unit for receiving and storing the terminal function from a signal including the terminal function information among the signals received by the signal receiving / processing unit;
The method comprising: managing a bandwidth for providing a service to the plurality of terminals through a Wi-Fi; determining whether a number of attempts of terminal accesses per unit time of a terminal entering a Wi- Whether or not a transmission rate of a management object frame to be transmitted to the plurality of terminals is controlled based on a management condition using any one of whether a traffic processing rate is lower than a preset reference processing rate, A bandwidth manager for determining whether the mobile terminal is a mobile terminal; And
And a signal transmission unit for transmitting a management object frame to a plurality of terminals at a transmission rate adjusted according to the transmission rate control result determined by the bandwidth management unit,
The bandwidth management system comprising:
delete The method according to claim 1,
The management object frame includes a frame used in a connection procedure in which a terminal accesses an access device, a frame used in an IP address allocation procedure and an ARP (Address Resolution Protocol) after the terminal accesses the access device, And transmitting the data larger than the preset reference data size. The method according to claim 1,
The signal reception /
When the signal strength of a signal including the received probe request message is equal to or less than a predetermined received signal strength based on a connection acceptance range adjusted by the bandwidth manager when receiving a probe request message transmitted from the terminal, Bandwidth management system. In a method for a bandwidth management system to manage bandwidth,
Based on a signal transmitted from a plurality of terminals, whether a terminal that has entered a Wi-Fi service area formed by an access terminal has a number of attempts to connect the terminal per unit time or more, Checking whether the management condition is lower than the throughput rate;
Determining whether to change a transmission rate of a management object frame to be transmitted to the plurality of terminals based on the management condition;
Determining whether to change a connection acceptance range for a new terminal requesting a service if it is determined that the transmission rate should be changed; And
If it is confirmed that the connection acceptance range should be changed, a step of transmitting a management object frame at a transmission rate changed to the plurality of terminals
The bandwidth management method comprising:
delete 6. The method of claim 5,
In the step of determining whether to change the transmission rate of the management object frame,
A bandwidth management method for determining a transmission rate of a management object frame using a transmission rate control algorithm applied to a data frame and determining a lowest rate set for each terminal to receive the management object frame as a transmission rate. 6. The method of claim 5,
After the step of transmitting the management object frame to the plurality of terminals at the changed transmission rate,
Wherein the probe request signal is limited when the signal strength of the probe request signal transmitted from the terminal is equal to or less than a preset received signal strength.

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