KR101514645B1 - Access Point Of WLAN is Connected By a Schedule And Scheduled Access Method Thereof - Google Patents

Access Point Of WLAN is Connected By a Schedule And Scheduled Access Method Thereof Download PDF

Info

Publication number
KR101514645B1
KR101514645B1 KR1020140016165A KR20140016165A KR101514645B1 KR 101514645 B1 KR101514645 B1 KR 101514645B1 KR 1020140016165 A KR1020140016165 A KR 1020140016165A KR 20140016165 A KR20140016165 A KR 20140016165A KR 101514645 B1 KR101514645 B1 KR 101514645B1
Authority
KR
South Korea
Prior art keywords
controller
communication
access points
access
access point
Prior art date
Application number
KR1020140016165A
Other languages
Korean (ko)
Inventor
조운선
박재규
김승연
박인순
고경세
오승석
이형주
최준수
곽동혁
곽준호
이광복
최성현
Original Assignee
주식회사 엘지유플러스
서울대학교산학협력단
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 엘지유플러스, 서울대학교산학협력단 filed Critical 주식회사 엘지유플러스
Priority to KR1020140016165A priority Critical patent/KR101514645B1/en
Application granted granted Critical
Publication of KR101514645B1 publication Critical patent/KR101514645B1/en

Links

Images

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/02Arrangements for optimising operational condition
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access, e.g. scheduled or random access
    • H04W74/04Scheduled or contention-free access

Abstract

The present invention relates to a wireless network access point allowing scheduled access and to a scheduled access method using the same, wherein the wireless network access point generates an access schedule and enables access to be made at a different point of time for each basic service set or basic service set group in accordance with the generated access schedule, thereby preventing a collision due to simultaneous access and also preventing the generation of a data transmission delay caused by the collision. According to the present invention, the wireless network access point allowing scheduled access comprises: a plurality of access points individually forming a wireless communications channel with a mobile device located within a communications range; and a controller connected to the access points, and controlling the access points in a manner that enables an access point selected from the access points to communicate with the mobile device.

Description

TECHNICAL FIELD [0001] The present invention relates to a wireless access device of a wireless network capable of a planned connection and a planned access method using the wireless access device.

The present invention relates to a wireless access device in a wireless network and a connection method using the wireless access device. More particularly, the present invention relates to a wireless access device in a wireless network, And to a planned connection method using the wireless access device of a wireless network capable of planned connection so as to prevent a data transmission delay due to a collision and an occurrence of a collision.

Wi-Fi (Wiress Fidelity) that can perform data communication such as the Internet, especially Wi-Fi (Wiress Fidelity), has been widely used due to its ease of use. As a result, facilities, places and environments Has increased significantly. In particular, recently, Wi-Fi functions are provided as basic functions in mobile devices such as smart phones, smart pads, and notebooks, and their use has been greatly increased as they are frequently used by users.

As is known, Wi-Fi provides a wireless communication channel for a mobile device to perform data communication wirelessly, and an access point (AC) is configured as a means for this purpose. Such an access point is connected to a device such as a server or a hub or router of a Wi-Fi network, and is connected to a wireless station (hereinafter referred to as a " mobile device " ) And the network.

The access point confirms entry of the mobile device that has entered the communication area of the access point, and exchanges data with the mobile device as needed. In particular, the access point periodically transmits a beacon containing various information for connection to confirm that the mobile device that has entered the communication area of itself can perform communication with itself. The beacon is used by the mobile device to identify and access the access point.

In order to provide a stable wireless communication service for a plurality of mobile devices and users, such as securing a wide range of communication radius due to restriction of a communication radius, and providing access to a plurality of mobile devices, Can be installed and operated.

However, in such a case, frequent collisions occur due to access points using the same frequency or the same frequency band, and data transmission and reception delays due to collisions occur.

Specifically, the access points transmit and receive various signals using the same frequency or the same frequency band for communication with the mobile device, and exchange data. That is, a beacon signal generated from access points using the same frequency or the same frequency band, and a data frame transmitted from the mobile device are transmitted or received through one communication channel. At this time, when one mobile device performs communication with one access point, it can normally perform communication. However, in a situation where such a communication is being performed, when an access point at a short distance, that is, a distance at which a radio signal is transmitted, transmits a beacon signal or another mobile device attempts to access the access point, Lt; / RTI >

If a collision occurs in this manner, the receiving terminal can not interpret the corresponding data, and a loss corresponding to the corresponding time occurs, and retransmission is performed in order to receive normal data. Such a repeated transmission takes a backoff time for retransmission, resulting in a loss of collision and an excess time due to retransmission, resulting in a decrease in efficiency of the entire network and a delay in data transmission of the corresponding terminal .

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method and apparatus for generating a connection schedule and allowing a connection to be established at a different time according to a basic service set or a basic service set group according to a generated schedule, And a planned connection method using the wireless connection device.

According to an aspect of the present invention, there is provided a wireless access device of a wireless network capable of being connected to a wireless access point, the access point forming a wireless communication channel with a mobile device within a communication radius, And a controller coupled to the access points and controlling the access points so that the selected one of the plurality of access points can communicate with the mobile device.

Wherein the access point and the mobile device are devices or groups of devices using the same basic service set identity.

Wherein the controller adjusts a communication availability time or a communication availability time of the access point by varying a contention window value for each of the plurality of access points.

Wherein the controller adjusts the contention window value such that a plurality of the access points communicate with the mobile device at different times.

The controller transmits a contention window value for each of the plurality of access points to the access point, and the access point includes a contention window value provided from the control in a beacon signal and delivers the contention window value to the mobile device within a communication radius .

The controller sets a contention window value of the access point, which is allowed to communicate among a plurality of the access points, to be smaller than a contention window value of the remaining access points.

Wherein the plurality of access points communicate with the mobile device by a single communication channel using the same frequency or the same frequency band.

The controller may change a priority, a communication time, and a communication point of time for a plurality of access points according to the traffic, the data rate, and the number of mobile devices attempting to access the access point.

The controller adjusts a communication enable time or a communication enable time of the access point by varying a NAV value for each of the plurality of access points.

The controller sets the NAV value as a communication channel is occupied for a plurality of the access points and sets the NAV value as the occupation of the communication channel is canceled for the selected access point And notifies the user.

In addition, a planned connection method using a wireless connection device of a wireless network according to the present invention is a planned connection method of an access point forming a wireless communication channel with the mobile device and the mobile device within a communication radius, Delaying a connection of the mobile device to a plurality of the access points; The controller selecting one of the access points to allow communication among the plurality of access points; Releasing a connection delay of one selected access point by the controller; And performing communication between the access point and the mobile device from which the connection delay is canceled.

When the communication between the selected access point and the mobile device is terminated, the controller reselects any one of the remaining plurality of access points; The controller delays connection delays of the re-selected access point and delays connection of the other access points.

Wherein delaying the connection or releasing the connection delay comprises changing the contention window value for each of the plurality of access points by the controller.

And the controller delays the connection delay by controlling the plurality of access points to communicate with the mobile device at different times.

Delaying the connection or releasing the connection delay comprises: the controller setting the contention window value for each of the plurality of access points; The controller delivering the contention window value to each access point; The plurality of access points delivering the contention window value to the mobile device within its communication radius; And a step in which the mobile device having received the contention window value applies a delay time due to the contention window value to a transmission process.

Wherein delaying the connection or releasing the connection delay sets the contention window value of the selected access point to be smaller than the contention window value of the remaining access points.

Wherein the plurality of access points communicate with the mobile device by a single communication channel using the same frequency or the same frequency band.

The step of delaying the connection or releasing the connection delay may be performed by a plurality of access points according to a load included in at least one of traffic, data rate, A communication delay time, and a communication time point of the communication terminal.

The step of delaying the connection or releasing the connection delay comprises the step of the controller varying the NAV value for each of the plurality of access points.

Wherein delaying the connection or releasing the connection delay comprises: setting the NAV value to inform the controller that the communication channel is occupied for a plurality of the access points, Further comprising setting the NAV value to indicate that the occupation of the communication channel has been canceled.

A wireless access device of a wireless network capable of planned connection according to the present invention and a planned access method using the wireless access network according to the present invention generate a connection schedule and make connections at different time points according to a basic service set or a basic service set group according to the generated schedule It is possible to prevent a collision due to the simultaneous connection and a data transmission delay due to the collision.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram illustrating a configuration of a wireless network according to the present invention. FIG.
FIG. 2 is an exemplary diagram illustrating a configuration of a BSS and a plan communication according to an embodiment of the present invention; FIG.
FIG. 3 is an exemplary diagram for explaining plan communication of each BSS according to time. FIG.
4 is a flowchart illustrating a planned connection method of a wireless access device in a wireless network according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. It should be noted that the drawings denoted by the same reference numerals in the drawings denote the same reference numerals whenever possible, in other drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. And certain features shown in the drawings are intended to be illustrative, not limiting, or reduced, or simplified, and the drawings and elements thereof are not necessarily drawn to scale. However, those skilled in the art will readily understand these details.

FIG. 1 is a configuration diagram showing a configuration of a wireless network according to the present invention.

Referring to FIG. 1, a wireless network according to the present invention includes a plurality of access points 10, a controller 20, and a mobile device 30 connected to a network 40.

The network 40 forms a communication channel with the mobile devices 30 through the access point 10 to provide data services. The network 40 may be a system such as a data system, a wired network system, or an Ethernet system constituted by a mobile communication system, or may be a system for providing an Internet service. The network 40 may include a gateway server, a router, a network hub, an Enhanced Packed Data Gateway (ePDG), and a Dynamic Host Configuration Protocol (DHCP) , And thus the present invention is not limited thereto.

The access point 10 establishes a communication channel between the network 40 and the mobile device 30 to enable data transmission between the mobile device 30 and the network 40. [ To this end, the access point 10 is connected to the network 40 by wire or wireless communication and forms a communication channel with the mobile devices 30 by wireless communication. The access points 10 (10a, 10b, and 10c) are formed of a plurality of access points 10a, 10b, and 10c to form a communication channel with the mobile devices 30 through designated channels or designated channels of a designated frequency band.

In particular, the access point 10 performs communication in units of BSS (Basic Service Set) selected by the controller 20 to avoid collision between BSSs located in the communication interference region. Specifically, the access point 10 receives a contention window value or a network allocation vector (NAV) value transmitted from the controller 20, and transmits the contention window value to the mobile device 30. At this time, a contention window value or a different value is transmitted to the mobile devices 30 of the BSS to which the access point 10 selected by the controller 20 belongs, which is different from that of the mobile device belonging to another BSS, The communication between the point 10 and the mobile device 30 is performed. Herein, the BSS may refer to a basic unit in which one mobile device 10 can be connected to or connected to one access point 10, and an access point that communicates internally using the same BSSID (Basic Service Set IDentification) 10) and a mobile device 30, as shown in FIG. At this time, the mobile device 30 may be a mobile device 30 that is changed or added to another mobile device 30 by entering or leaving the BSA (Basic Service Area) of the access point 10, , And thus the present invention is not limited thereto. In the description of the present invention, it is assumed that one access point 10 and a mobile device 30 connected to each access point 10 are one BSS. The planned communication method by the access point 10 and the controller 20 will be described in more detail below.

The controller 20 selects a communication time point and a communication time point for each BSS, and controls the access point 10 of each BSS according to a selected item. Specifically, the controller 20 controls each of the access points 10 and the mobile devices 30 such that a time and a time at which each BSS configured by the plurality of access points 10 can perform communication are changed. To this end, the controller 20 adjusts the contention window (CW) or the NAV (NAV) value so that the per-BSS communication can be performed. More specifically, the controller 20 adjusts the contention window (CW) or the NAV value to delay communication of the access point 10 of all BSSs and the mobile device 30 communicating therewith. The controller 20 selectively adjusts a contention window CW value or a NAV value of the access point 10 and the mobile device 30 of the specific BSS so that communication is performed only in the selected BSS. So that communication can be performed in units of BSSs alternately. Particularly, the controller 20 preferentially loads the access point 30 having a large load, such as when the traffic is concentrated or relatively large, or when the BSS is configured, that is, when the number of mobile devices 30 attempting to communicate is large, And relatively frequently. For this purpose, the controller 20 senses the load of the access points 10 and selects the access point 10 therethrough. The controller 20 may be configured as a separate terminal that is configured independently of the access point 10 and the network 40, a designated one of the access points 10, a server, a router, , And thus the present invention is not limited thereto.

The mobile device 30 configures the BSS with the access point 10 by entering or leaving the communication radius of the access point 10. [ Then, the mobile device 30 forms a communication channel with the access point 10 of the same BSS to perform data communication. This mobile device 30 receives a contention window (CW) value or a NAV value through the access point 10 and is accessed by a delay time defined by a contention window (CW) value or a NAV To the point (10). The mobile device 30 includes various portable terminals including a smart phone, a smart pad, a notebook, a notepad, and various devices capable of wireless connection to the access point 10. [

FIG. 2 is a diagram for explaining the configuration of a BSS and the plan communication according to the present invention. FIG. 3 is a diagram illustrating a plan communication of each BSS according to the flow of time. Fig.

2 and 3, the BSSs 50, 51, 52 and 53 are connected to access points 10a, 10b and 10c and a plurality of mobile devices 30: 30aa, 30ab, 30ba, 30bb, 30bc, 30bd, 30ca, 30cb, 30cc). Here, it is assumed that the BSS 50 of FIG. 2 and FIG. 3 performs communication using a single frequency or a single frequency band for communication, and a range in which radio waves between the BSSs 50 can interfere with each other It is assumed that the BSS 50 is configured. The mobile device 30 belonging to the first BSS 51 belongs to the communication radius of the access points 10b and 10c of the second BSS 52 and the third BSS 53 although the mobile devices 30aa and 30ab belong to the first BSS 51, , Communication with the first access point 10a is advantageous and communication with the first access point 10a is mainly performed. The same applies to the mobile device 30 belonging to the second BSS 52 and the third BSS 53. [ That is, although the BSS 50 can be changed without changing the physical location according to the communication environment, the virtualization, and the traffic concentration in the actual situation, in the present invention, The BSS 50 of FIG.

Generally, a wireless LAN or wireless network system, such as Wi-fi, uses a pre-allocated frequency band or frequency, such as the Industry-Science-Medical (ISM) band, Or band. Of course, the IMS band is divided into a plurality of channels. However, since the channels are adjacent to each other, interference due to communication may occur. In the present invention, a single frequency or a single frequency band is used to mean a frequency or a band that may cause interference due to communication with a frequency band that is currently in use.

2, when the notebook 30bb of the second BSS 52 performs communication with the second access point 10b, it occupies the communication channel for a predetermined time, thereby causing the remaining terminals of the second BSS 52 All the mobile devices 30 of the first and third BSSs 51 and 53 can not communicate during the communication period of the notebook 30bb and when a communication is attempted during this period, And eventually causes a delay in data transmission.

In order to solve this problem, in the present invention, communication in each BSS 50 is performed by a scheduled schedule. Specifically, the controller 20 minimizes channel contention between the BSSs 50 by designating the channel occupancy time of each BSS 50, thereby enabling fast and stable data communication.

Specifically, the controller 20 performs this by adjusting the contention window (CW) value or the NAV value.

[How to adjust the contention window (CW) value]

The controller 20 informs the access points 10 of each BSS 50 of the contention window CW so that the value of the transmission window of each mobile device 30 has a large enough delay time, And transmits the determined value to each of the access points 10a, 10b, and 10c. The access points 10a, 10b and 10c include the received contention window CW value in the beacon signal or broadcast separately and are transmitted to the mobile devices 10a, 10b and 10c 30 or the mobile devices 30 capable of communicating receive the value of the contention window CW.

When the contention window CW received by the mobile devices 30 is applied to the transmission process, the access to the access point 10 is delayed due to the long delay time, 30) is absent. At this time, the controller 20 transmits the contention window CW to the selected BSSs 51, 52 and 53 with a very small value in consideration of the load and the like. The access points 10a, 10b, and 10c. At this time, a contention window (CW) value for lengthening the delay time may be transmitted to the unselected access points 10a, 10b, 10c again, but the present invention is not limited thereto.

On the other hand, the access points 10a, 10b, and 10c that have received the contention window CW having a delay time smaller than that of the other BSSs 51, 52, and 53 deliver this to the mobile device 30, ) Applies the contention window (CW) value to the transmission process.

At this time, the mobile devices 30 belonging to the BSS having a relatively small delay time compete only within the BSSs 51, 52 and 53 in a state in which the other mobile devices 30 do not attempt to access due to a small delay time The access point 10a, 10b, or 10c is connected to the access point 10, and data can be transmitted / received according to the success of the connection.

When the time allocated to the BSS 50 with the specified delay time is terminated, the controller 20 performs this process on the next selected BSS 51, 52, 53 according to the load amount or the like, It is possible to provide fast and stable data transmission by minimizing the contention through the BSS 50, that is, the possession of the channel by the access point, that is, the possession of the medium (Medium).

The contention window CW is an important value for determining a backoff time, which is a transmission delay time. Specifically, there is an IFS (Interframe Space) between the mobile device 30 and the access point 10 and a delay time due to the backoff time. The length of the backoff time depends on the contention window CW Respectively. The backoff time is defined by Equation (1).

Figure 112014013885497-pat00001

Here, the slot time is a predetermined time slot. A random integer is an integer arbitrarily set between 0 and the contention window value. At this time, the contention window value is given by the minimum value (CWmin) and the maximum value (CWmax). The controller 20 controls the communication of the BSS by increasing or decreasing the minimum value CWmin and the maximum value CWmax of the contention window CW.

Specifically, this process is schematically shown in FIG. A value smaller than the value of the contention window CW transmitted to the other BSSs 52 and 53 to the first access point 51 of the first BSS 51 in order to allow the controller 20 to acquire the first BSS 51 And the remaining second and third BSSs 52 and 53 deliver a value of the contention window of large value. For example, if the minimum value of the contention window is 15 and the maximum value is 1023, the value of the contention window (CW) is delivered to the selected first BSS 51 and the value of the contention window (CW) CW) value is transmitted as a value close to 1023.

When the communication of the first BSS 51 is performed in this way, the contention window value of the second BSS 52 is made smaller than that of the other BSSs 51 and 53 so that communication can be performed. By continuously applying such a method, communication is performed by occupying a communication channel or communication means sequentially in units of a BSS 50 as shown in FIG. 3, each of the BSSs 51, 52, and 53 may be sequentially allocated and the BSSs 51, 52, and 53 may have different time lengths, More often, it can be controlled to occupy longer.

[How to adjust the NAV value]

On the other hand, it is possible to select the BSS 50 using the NAV in a manner similar to the method of adjusting the contention window value described above. A network allocation vector (NAV) is a value that serves as a timer indicating time information indicating that the wireless medium is in use. The controller 20 transmits the NAV value contained in the Request To Send (RTS) or Clear To Send (CTS) to all the BSSs 50, 51 and 52 at a maximum value. The first access point 10a transmits a NAV value based on a predetermined time value only to the BSSs 51, 52 and 53 for which transmission is permitted, for example, the first BSS 51, 51 to transmit the NAV value to occupy the communication channel, it becomes possible to perform communication for each BSS 50 in the same manner as in FIG. 3 described above.

The method of adjusting the NAV value is similar to the method of adjusting the contention window value except that the value to be adjusted is the NAV value, so a detailed description thereof will be omitted.

4 is a flowchart for explaining a planned connection method of a wireless access device in a wireless network according to the present invention.

Referring to FIG. 4, a planned connection method of a wireless access device of a wireless network according to the present invention includes a step of delaying a connection of a mobile device by a controller, a step S20 of selecting an access point to allow communication, (S30) of releasing a connection delay of a point and a step (S40) in which communication is performed.

The step of delaying the connection of the mobile device (S10) includes a preparation process for allowing the controller 20 to specify the communication order of each BSS 50 and to perform communication for different times at different points of time according to the BSS 50 . In step S10 of delaying the connection of the mobile device, the controller 20 selects a communication medium including a communication channel by the other BSS 50 so that communication is performed only by the selected BSS 50 when the BSS is selected. In order to prevent the occupation and competition of the access point 10 by the mobile device 30. To this end, in the step of delaying the connection of the mobile device (S10), the controller 20 sets a contention window CW value or NAV to the access point 10 as described above, To be transmitted to the mobile device (30). Specifically, the controller 20 sets the value of the contention window CW to a sufficiently large value (for example, 527 or 1023) to increase the delay time, or the communication channel occupied by the NAV value for several hundreds ms or more And transmits it. The access point 10 and the mobile device 30 which have received the contention window CW value or the NAV value in step S10 when the connection of the mobile device is delayed, (NAV) value without having to perform communication.

The step S20 of selecting an access point to allow the communication is the step of the controller 20 selecting the BSS 50 to allow the occupation of the communication means. In step S20 of selecting the access point, the controller 20 checks information such as the load of the access points 10, that is, the traffic, the number of access attempts, and the data rate to determine the access point 10 .

The step S30 of releasing the connection delay of the selected access point is a step of preparing a state in which communication can be released by releasing the delay of the access point 10 selected in the step S20 of selecting the access point. In step S30 of releasing the connection delay of the selected access point, the controller 20 compares the value of the contention window CW that minimizes the delay time only to the BSS 50 constituted by the selected access point 10, NAV) value. In step S30 of deleting the connection delay of the selected access point specifically, the controller 20 transmits a contention window CW value different from that of the other BSS 50 only to the BSS 50 constituted by the selected access point 10 Or the NAV (NAV) value. The controller 20 transmits a contention window CW value or a NAV value with a minimum delay time to the access point 10 of the selected BSS 50 and transmits the contention window CW or NAV value to the access point 10 (CW) or a NAV (NAV) value in which the delay time is maximized. The access point 10 having received the contention window CW value or the NAV value delivers it to the mobile device 30 and the mobile device 30 transmits the contention window CW value Or a NAV (NAV) value.

The step S40 of the communication is performed by the access point 10 and the access point 10 constituting the BSS 50 selected by the contention window CW value or the NAV value transmitted to the access point 10 and the mobile device 30, The mobile device 30 attempts to communicate between the access point 10 and the mobile device 30 using a relatively short delay time as compared to the other BSS 50 The communication between the device 30 and the access point 10 is performed. At this time, the time at which the communication proceeds is limited by the contention window (CW) value or the NAV value transmitted by the controller 20.

On the other hand, the occupancy time of the selected one BSS 50 can be adjusted by the controller 20 to adjust the value of the contention window CW or the NAV value, or may be automatically terminated by a predetermined time .

When the occupation and communication of the communication means are terminated by one BSS 50, the controller 20 selects another BSS 50 and proceeds to the above-mentioned process, So that communication can be performed.

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, . ≪ / RTI > Accordingly, such modifications are deemed to be within the scope of the present invention, and the scope of the present invention should be determined by the following claims.

10, 10a, 10b, 10c: Access point
20: Controller
30, 30aa, 30ab, 30ac, 30ba, 30bb, 30bc, 30ca,
50: BSS
51: 1st BSS
52: 2nd BSS
53: Third BSS

Claims (20)

  1. A plurality of access points each forming a wireless communication channel with a mobile device within a communication radius and configuring a basic service set with the mobile device using the same basic service set identity; And
    And a controller for assigning a communication rank to each of the basic service sets and controlling communication for each independent basic service set for each of the basic service sets.
  2. The method according to claim 1,
    The controller comprising:
    And transmits information corresponding to the communication order to the basic service set to control communication of the basic service set.
  3. An access point forming a wireless communication channel with a mobile device within a communication radius, the access point comprising a plurality of wireless devices; And
    And a controller coupled to the access points to control the access points so that the selected one of the plurality of access points can communicate with the mobile device,
    The controller
    Wherein the access point is capable of changing a contention window value for each of the plurality of access points to adjust a communication enable time or a communication enable time of the access point.
  4. The method of claim 3,
    Wherein the controller adjusts the contention window value to allow the plurality of access points to communicate with the mobile device at different times.
  5. The method of claim 3,
    The controller communicating a contention window value for each of the plurality of access points to the access point,
    Wherein the access point includes a contention window value provided from the control and transmits the beacon signal to the mobile device within a communication radius.
  6. 5. The method of claim 4,
    The controller
    Wherein a contention window value of the access point allowed to communicate among the plurality of access points is set to be smaller than a contention window value of the remaining access points.
  7. The method of claim 3,
    Wherein the plurality of access points communicate with the mobile device by a single communication channel using the same frequency or the same frequency band.
  8. The method of claim 3,
    Wherein the controller changes a priority, a communication time, and a communication point of time for a plurality of access points according to the traffic, the data rate, and the number of mobile devices attempting to access the access point. Wireless connection device.
  9. An access point forming a wireless communication channel with a mobile device within a communication radius, the access point comprising a plurality of wireless devices; And
    And a controller coupled to the access points to control the access points so that the selected one of the plurality of access points can communicate with the mobile device,
    The controller
    Wherein the NAV value of each of the plurality of access points is varied to adjust the communication enable time or the communication enable time of the access point.
  10. 10. The method of claim 9,
    Wherein the controller notifies the NAV value that the communication channel is occupied for a plurality of the access points,
    And notifies the selected access point by setting the NAV value as the occupation of the communication channel is canceled for the selected access point.
  11. A planned connection method of an access point comprising a plurality of mobile devices and a wireless communication channel with the mobile device within a communication radius,
    Delaying a connection of the mobile device to a plurality of the access points by the controller;
    The controller selecting one of the access points to allow communication among the plurality of access points;
    Releasing a connection delay of one selected access point by the controller; And
    And performing communication between the access point and the mobile device with the access delay canceled.
  12. 12. The method of claim 11,
    When the communication between the selected access point and the mobile device is terminated, the controller reselects any one of the remaining plurality of access points;
    Further comprising the steps of: releasing connection delay of the access point reselected by the controller and delaying connection of the other access points.
  13. 13. The method of claim 12,
    The step of delaying the connection or releasing the connection delay
    And the controller is configured to vary a contention window value for each of the plurality of access points.
  14. 14. The method of claim 13,
    The step of releasing the connection delay
    Wherein the controller controls the plurality of access points to communicate with the mobile device at different times.
  15. 14. The method of claim 13,
    The step of delaying the connection or releasing the connection delay
    The controller setting the contention window value for each of the plurality of access points;
    The controller delivering the contention window value to each access point;
    The plurality of access points delivering the contention window value to the mobile device within its communication radius; And
    And the mobile device receiving the contention window value applies a delay time based on the contention window value to the transmission process.
  16. 16. The method according to claim 13 or 15,
    The step of delaying the connection or releasing the connection delay
    Wherein the controller sets the contention window value of the selected access point to be smaller than the contention window value of the remaining access points.
  17. 14. The method of claim 13,
    Wherein the plurality of access points communicate with the mobile device through a single communication channel using the same frequency or the same frequency band.
  18. 16. The method according to claim 13 or 15,
    The step of delaying the connection or releasing the connection delay
    A communication time and a communication time point for a plurality of access points in accordance with a load included in at least one of traffic, data rate, and number of mobile devices in connection attempt by the controller And the wireless access device of the wireless network.
  19. 13. The method of claim 12,
    The step of delaying the connection or releasing the connection delay
    Wherein the controller is configured to vary a NAV value for each of the plurality of access points.
  20. 20. The method of claim 19,
    The step of delaying the connection or releasing the connection delay
    The controller establishing and notifying the NAV value that the communication channel is occupied for a plurality of the access points; and
    Further comprising setting the NAV value to indicate that the occupation of the communication channel is canceled for the access point selected by the controller, and notifying the NAV (NAV) Way.
KR1020140016165A 2014-02-12 2014-02-12 Access Point Of WLAN is Connected By a Schedule And Scheduled Access Method Thereof KR101514645B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140016165A KR101514645B1 (en) 2014-02-12 2014-02-12 Access Point Of WLAN is Connected By a Schedule And Scheduled Access Method Thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140016165A KR101514645B1 (en) 2014-02-12 2014-02-12 Access Point Of WLAN is Connected By a Schedule And Scheduled Access Method Thereof

Publications (1)

Publication Number Publication Date
KR101514645B1 true KR101514645B1 (en) 2015-04-23

Family

ID=53053957

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020140016165A KR101514645B1 (en) 2014-02-12 2014-02-12 Access Point Of WLAN is Connected By a Schedule And Scheduled Access Method Thereof

Country Status (1)

Country Link
KR (1) KR101514645B1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120002087A (en) * 2010-06-30 2012-01-05 한국전자통신연구원 Apparatus and method for selecting of ap considering network performance
KR20130016222A (en) * 2010-02-12 2013-02-14 인터디지탈 패튼 홀딩스, 인크 Access control and congestion control in machine-to-machine communication
KR101260215B1 (en) * 2004-09-13 2013-05-06 인터디지탈 테크날러지 코포레이션 Method and apparatus for determining and managing congestion in a wireless communications system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101260215B1 (en) * 2004-09-13 2013-05-06 인터디지탈 테크날러지 코포레이션 Method and apparatus for determining and managing congestion in a wireless communications system
KR20130016222A (en) * 2010-02-12 2013-02-14 인터디지탈 패튼 홀딩스, 인크 Access control and congestion control in machine-to-machine communication
KR20120002087A (en) * 2010-06-30 2012-01-05 한국전자통신연구원 Apparatus and method for selecting of ap considering network performance

Similar Documents

Publication Publication Date Title
US8687642B2 (en) Hybrid coordination function (HCF) access through tiered contention and overlapped wireless cell mitigation
US7136361B2 (en) Hybrid coordination function (HCF) access through tiered contention and overlapped wireless cell mitigation
US9363006B2 (en) Wireless communication methods, systems, and computer program products
US7957347B1 (en) System and method for estimating bandwidth requirements of and allocating bandwidth to communication devices operating in a network
US9750050B2 (en) Control of quality of service in overlapping basic service sets in wireless local area networks
CN103222294B (en) Hybrid cellular network and a device to device independent unlicensed band reuse
RU2573641C2 (en) Collision reduction mechanisms for wireless communication networks
CA2596997C (en) Optimal channel assignment for multi-class, multi-channel wireless lans and the like
KR101710620B1 (en) Method and system of radio frequency(RF) power transmission in a wireless network
KR100922078B1 (en) Increasing link capacity via concurrent transmissions in centralized wireless LANs
KR101481586B1 (en) Method for communcation time allocation of multiple radio
US7843819B1 (en) Protocol for wireless multi-channel access control
EP1587221A2 (en) System of wireless local area network based on transmit power control and method for controlling transmit power
CA2771881C (en) Method of controlling channel access
US7016372B2 (en) Dynamic bandwidth allocation in AD hoc wireless piconets
US8730990B2 (en) Method, apparatus, and computer program product for quiet period management in wireless networks for coexistence
US7995544B2 (en) Wireless LANs and neighborhood capture
CN102742333B (en) The method and apparatus of transmit power control in WLAN
JP2015506635A (en) Communication using distributed channel access parameters
Choi et al. Multi-channel MAC protocol for mobile ad hoc networks
JP4143011B2 (en) Carrier sense multiple access method, radio base station apparatus and radio terminal apparatus
US8243699B2 (en) Multi-channel MAC method for WLAN devices with a single radio interface and system for implementing the same
US20030086437A1 (en) Overcoming neighborhood capture in wireless LANs
CN104754748B (en) A kind of D2D resource allocation methods, data transmission method and device
US9215693B2 (en) Method for radio resource management in device-to-device communication

Legal Events

Date Code Title Description
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20180313

Year of fee payment: 6