KR20160141933A - Movable Wireless LAN AP Apparatus - Google Patents

Movable Wireless LAN AP Apparatus Download PDF

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Publication number
KR20160141933A
KR20160141933A KR1020150077523A KR20150077523A KR20160141933A KR 20160141933 A KR20160141933 A KR 20160141933A KR 1020150077523 A KR1020150077523 A KR 1020150077523A KR 20150077523 A KR20150077523 A KR 20150077523A KR 20160141933 A KR20160141933 A KR 20160141933A
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KR
South Korea
Prior art keywords
mobile
fixed
wireless
wireless lan
wireless terminal
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KR1020150077523A
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Korean (ko)
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KR101699068B1 (en
Inventor
이영신
김원영
박형준
송희석
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(주)씨어스테크놀로지
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Priority to KR1020150077523A priority Critical patent/KR101699068B1/en
Publication of KR20160141933A publication Critical patent/KR20160141933A/en
Application granted granted Critical
Publication of KR101699068B1 publication Critical patent/KR101699068B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H04W64/003—Locating users or terminals or network equipment for network management purposes, e.g. mobility management locating network equipment

Abstract

According to an embodiment of the present invention, a movable wireless LAN access point (AP) device comprises: a fixed AP configured to provide a wireless LAN AP with respect to at least one wireless terminal; and a movable AP configured to function as a wireless LAN multi-bridge connected to the fixed AP. The movable AP is coupled to the fixed AP to be charged. When strength of a receiving signal from a wireless terminal connected to the fixed AP is a reference value or less, the movable AP moves to a location adjacent to the wireless terminal to relay the receiving signal from the wireless terminal to the fixed AP.

Description

[0001] Movable Wireless LAN AP Apparatus [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile wireless LAN access point (AP) apparatus, and more particularly, to a wireless LAN access point apparatus that provides a wireless communication network without a shadow area for one or more communication terminals connected to a wireless repeater.

Wireless Local Area Network (WLAN) is a technology designed to overcome the disadvantages of Ethernet, which is a wired LAN, and has advantages of minimizing wiring work, maintenance cost and installation cost. Also, as a wireless access technology using Industrial, Scientific and Medical (ISM) band, IEEE 802.11n with MIMO can provide high-speed wireless communication of 150 Mbps maximum at indoor terminals within a radius of 70 m.

An IEEE 802.11 WLAN is an access point (hereinafter referred to as " AP ") that converts a frame of an 802.11 network to another type of frame, A smart phone, a tablet pad, and the like equipped with a wireless LAN device capable of interfacing with a wireless network. In general, an AP plays a similar role as a LAN hub, and 25 to 50 terminals can be connected and used simultaneously in a radius of 20 to 150 m per AP.

However, the communication coverage that can be covered by a single AP is limited. Especially, when there are obstacles such as a wall or a door in the middle due to the characteristics of a high frequency band such as 2.4 GHz or 5 GHz used in the AP, there is a problem in that the signal intensity falls rapidly. In order to solve this problem, a method of installing a secondary AP device in a shaded area in addition to the main AP device is also used. However, when there are a plurality of shadow areas in the corresponding area, there is a problem in that the same number of auxiliary AP devices must be installed in order to cover them all, which is inefficient in terms of cost.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a mobile wireless LAN AP capable of ensuring smooth signal strength even when a wireless terminal using a wireless LAN is located in a shadow area.

Another aspect of the present invention is to provide a mobile WLAN AP device capable of providing an optimal communication environment for a plurality of wireless terminals even when a plurality of wireless terminals are connected to a wireless LAN at different locations.

According to an aspect of the present invention, there is provided a mobile WLAN AP device including a fixed AP for providing a wireless LAN access point for one or more wireless terminals; And a mobile AP functioning as a wireless LAN multi-bridge connected to the fixed AP, wherein the mobile AP is coupled to the fixed AP and is charged, and when the strength of a received signal from a wireless terminal connected to the fixed AP is less than or equal to a reference value The mobile terminal moves to a position adjacent to the wireless terminal and relays the reception signal from the wireless terminal to the fixed AP.

Here, the mobile AP sets one or more sample points for the shadow area, moves the sample point based on the intensity of the received signal of the wireless terminal or the user's instruction, The intensity of the received signal can be measured, and the position to be moved can be selected according to the measurement result.

In addition, the mobile AP according to another aspect of the present invention provides a wireless LAN access point (AP) at an arbitrary position separated from the fixed AP, and controls the at least one driving unit to move to an arbitrary position. A communication unit connected to the fixed AP and one or more wireless terminals at a movement position and relaying a reception signal from the wireless terminal to the fixed AP; And a path management unit for determining the movement position and the movement path based on the intensity of the received signal from the wireless terminal.

Here, the path management unit may move one or more predetermined sample points to measure the strength of a received signal from the wireless terminal at each sample point.

The present invention solves the above problems, and it is possible to ensure smooth signal strength even when a wireless terminal using a wireless LAN is located in a shadow area.

In addition, the mobile wireless LAN AP of the present invention can provide the best possible communication environment for a plurality of wireless terminals connected even when a plurality of wireless terminals are connected to a wireless LAN at different locations.

1 is a schematic diagram of a mobile WLAN AP apparatus according to an embodiment of the present invention.
2 is a detailed configuration diagram of a mobile WLAN AP apparatus according to an embodiment of the present invention.
3 is a flowchart illustrating a process of providing a wireless LAN in a mobile wireless LAN AP according to an exemplary embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that the terms "comprises" and / or "comprising" used in the specification are intended to be inclusive in a manner similar to the components, steps, operations, and / Or additions. The terms first, second, etc. may be used to describe various elements, but the elements should not be limited by terms. Terms are used only for the purpose of distinguishing one component from another.

Hereinafter, a mobile WLAN AP apparatus according to an embodiment of the present invention will be described with reference to the drawings.

1 is an overall schematic diagram of a mobile WLAN AP apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the mobile wireless LAN access point (hereinafter, referred to as a wireless LAN access point) includes a mobile AP 100 and a fixed AP 200. The mobile AP 100 has one or more antennas 160 for transmitting and receiving data, and is separated from the fixed AP 200 and moves to a desired location to function as a wireless LAN AP. The mobile AP 100 is connected to the stationary AP 200 and charges the internal battery using AC power supplied from an external embedded socket 400. The mobile AP 100 supplies driving power in a state separated from the fixed AP 200 using the charged energy of the charged battery.

The mobile AP 100 can move to a desired destination by controlling one or more driving wheels formed at a lower portion of the mobile AP 100. Thus, the mobile AP 100 moves to a shaded area that is out of or covered by the wireless LAN coverage by the fixed AP 200, The wireless signal of sufficient strength can be transmitted. To this end, the mobile AP 100 may include one or more cameras 122 and 124 to capture an image of a forward or upward direction. In addition, the mobile AP 100 may further include a sensor unit 112 for wireless communication with a microphone 114 and / or other remote control 300 for receiving an external audio signal

The stationary AP 200 periodically transmits a beacon frame through an antenna 210 disposed outside the apparatus to perform passive scanning to the surrounding wireless terminal UE or to transmit a beacon frame to nearby wireless terminals UE UEs to a wireless LAN communication channel and transmits / receives data through the wireless LAN communication channel. At this time, one or more LED indicators 220 for displaying the wireless communication operation status through the fixed AP 200 may be disposed outside the device. The fixed AP 200 is connected to the wall plug-in receptacle 400 to receive AC power and transmits the supplied power to the mobile AP 100 via the interface terminal 230 formed on one side, ) Can be charged.

The mobile WLAN AP apparatus may further include a remote controller 300 for controlling operation, setting, and movement of the mobile AP 100 to a desired location.

2 shows a detailed configuration of a mobile WLAN AP device centering on the mobile AP.

2, the mobile WLAN AP apparatus includes a fixed AP 200 and a mobile AP 100 coupled to the fixed AP 200, and may further include a remote controller 300 have.

The mobile AP 100 includes a sensor unit 112, a microphone 114, a front camera 122, an upper camera 124, a controller 130, a driver 140, a memory 150, an antenna 160, And a power supply unit 170.

The sensor unit 112 includes an obstacle detection sensor disposed at a predetermined interval around a side of the body for transmitting a signal to the outside and receiving a reflected signal, an odometer detecting sensor capable of measuring a distance to be traveled, An infrared sensor for receiving a signal transmitted from the infrared sensor 300, and the like. The obstacle detection sensor may be formed of a pair of an infrared light emitting element for emitting infrared light and a light receiving element for receiving reflected light. The travel distance detecting sensor detects the number of rotations of the driving wheels of the driving unit 140 and detects the traveling distance and traveling direction of the mobile AP 100.

The microphone 114 receives a sound signal generated in the vicinity of the mobile AP 100 and the received sound signal is transmitted to the control unit 130. The voice recognition unit 134 of the control unit 134 receives And compares the frequency characteristic of the voice signal with the frequency characteristics of the pre-registered command signal to determine whether an operation command to the mobile wireless LAN AP device, in particular, the mobile AP 100 has occurred.

The front camera 122 is disposed on the front side of the apparatus so as to capture an image in front of the mobile AP 100. [ A series of images picked up by the front camera 122 is transmitted to the control unit 130.

The upper camera 124 is disposed on the upper side of the mobile AP 100 to pick up an image of the upper side of the device and transmits the acquired image to the control unit 130.

The control unit 130 controls each component of the mobile AP 100. Specifically, the control unit 130 generates a video map for the upper area based on the upper image captured by the upper camera 124, and stores the generated video map in the memory 150. In particular, the controller 130 may acquire an upper image at a specific position set by the user, store the upper image in a predetermined position, and store the upper image. At this time, the specific position may be one or more positions belonging to the target area, and may be set by matching the voice information of the user to each position. For example, the particular location may be one or more sample points for analysis of the propagation intensity.

The control unit 130 further includes a drive control unit 132, a voice recognition unit 134, a communication unit 136, and a route management unit 138.

The driving control unit 132 controls the driving unit 140 to drive the target area based on the forward image generated by the front camera 122. [ At this time, the driving control unit 132 can refer to the image map of the upper area stored in the memory 150 together with the forward image, and can specify the current position during the driving in more detail.

Also, the control unit 130 can set a command signal of the user using the voice recognition unit 134. [ The command signal is a signal related to an operation command for controlling the operation of the apparatus, and may include, for example, a call signal to a previously registered specific position, a return signal to the fixed AP 200, . The calling signal to a specific location may be in the form of a combination of voice information corresponding to the location. For example, when the user records and sets "mobile AP movement" as a calling signal and sets "second room" as voice information related to a specific location, the voice recognition unit 134 recognizes an external sound When the " moving AP moving " and " second room " sound signals are sequentially recognized within a predetermined interval from the signal, the driving unit 140 is controlled through the driving control unit 132 to move to a specific position corresponding to the second room have.

In addition, the controller 130 may monitor a charged state of the battery of the mobile AP 100 and may generate a return signal to return to the fixed AP 200 when the battery level falls below a predetermined level. The mobile AP 100 is connected to the stationary AP 200 and charges the battery through an AC power source provided through an external embedded socket. At this time, the controller 130 monitors the output voltage of the battery and controls the driving unit 140 in the drive controller 132 to return the mobile AP 100 to the fixed AP 200 when the output voltage of the battery is lower than the reference value And control the switching of the communication channel with the corresponding mobile station UE to the fixed AP 200 when the propagation signal with the mobile station UE connected to the mobile AP 100 on the return path becomes a certain level or less.

The communication unit 136 performs wireless communication with the wireless terminal UE and the fixed AP 200. [ To this end, the communication unit 136 periodically transmits a beacon frame through the antenna 160 to perform passive scanning to the surrounding wireless terminal UE or to communicate with the connected wireless terminals UE Connects channels and sends and receives data through them.

The communication unit 136 also controls the signal intensity with the fixed AP 200 at one or more sample points located on the path and the signal strength with the connected wireless terminal UE under the control of the path management unit 138, It is possible to radiate radio waves.

The route management unit 138 manages a traveling route (traveling route) of the mobile AP 100, manages one or more sample points on the traveling route and a specific location set by the user, And determines an optimal position at which the mobile AP 100 moves based on the strength of the received signal from the acquired mobile terminal UE and the fixed AP 200. [

Specifically, the route management unit 138 sets a traveling route to the area for the WLAN support. The movement path may be a path set by a user in advance, and may be a path set by a user to move to a shaded area found based on the strength of a transmission / reception signal with the fixed AP 200, Lt; / RTI > The path management unit 138 may select one or more sample points capable of covering the corresponding shadow region for each detected shadow region and register the same. At this time, the registered sample points may include position information, respective identification numbers, and upper image information at the corresponding positions.

The driving unit 140 includes two pairs of wheels disposed under the movable AP 100 and one or more motors connected to the two pairs of wheels to rotate the wheels. Two wheels installed on both sides of the two pairs of wheels are driven to rotate left and right of the mobile AP 100, and two wheels installed at both sides of the rear of the mobile AP 100 drive the mobile AP 100 in a forward / reverse direction.

The memory 150 stores frequency characteristic information of command sound signals for at least one operation control. When a sound signal generated from the outside through the microphone 114 is sensed, the speech recognition unit 134 of the controller 130 outputs the frequency characteristic of the acquired sound signal to the frequency characteristic of one or more command signals stored in the memory 150 And determines whether or not a specific operation command has been issued.

The memory 150 may also store one or more location information. The position information may be distance information and direction information for a specific position, movement path, or sample point, and may be upper image information captured at a position corresponding to the position information.

3 is a flowchart illustrating an initial setup process and a device movement process in the mobile WLAN AP device.

Referring to FIG. 3, the mobile WLAN AP device initializes an upper image of the entire area and an intensity of a transmission / reception signal with respect to the fixed AP 200 according to each point, a distance based on the fixed AP 200, Information and direction information. This is referred to as a video map and a traveling route creation process (S100). In this process, the controller 130 acquires an upper image of the entire object area using the upper camera 124 disposed on the upper side of the mobile AP 100. In addition, when a specific object such as a lamp or a fire alarm is present on the ceiling of the target area, the specific image of the specific object may be determined as a minutia point so that the upper image of the surrounding area can be distinguished. Various known methods can be applied to the image processing method for extracting the feature points from the captured image. For example, it is possible to convert the captured image into a gray level, and then process pixel points having similar values as consecutive coordinate values as feature points.

In addition, the controller 130 stores location information of a specific location set by the user (S110). The location information may be information about a location that the user has selected arbitrarily, and a user may register a specific location at one or more locations. For this, the user can move the mobile AP 100 to a desired position using the remote controller 300 and register the current position. At this time, the user can input voice information corresponding to the current position through the microphone 114, and the inputted voice information can be registered by matching with the position information. The controller 130 may store location information corresponding to the current position, corresponding voice information and an upper image in a matching manner in response to a location registration request of the user. In addition, the controller 130 sets one or more sample points for one or more shadow areas found in the image mapping process, and registers distance and direction information thereon. The steps S100 and S110 may be set to be performed periodically.

The mobile AP 100 is normally coupled to the fixed AP 200 and is maintained in a charged and standby state (S120). In this case, the microphone 114 is maintained in an activated state. If a call signal through the user or a call signal via the remote controller is detected by the user, the controller 130 analyzes the detected voice call signal or the remote control call signal It is possible to identify the specific position to be moved and control the driving unit 140 to move the mobile AP 100 to the corresponding position. For example, when the user registers three points of a living room, a large room, and a small room, the user can call any voice signal set in the calling signal, determine the corresponding registration point, and move to the corresponding location.

According to another embodiment, the mobile AP 100 monitors the strength of signals transmitted and received between one or more mobile terminals (UE) connected to the fixed AP 200 and the fixed AP 200, If the strength of the received signal from the mobile station UE is less than the reference value, the mobile station UE can move to the vicinity of the mobile station UE and provide the access point AP at step S130.

In this case, the mobile AP 100 circulates a predetermined traveling route, and the signal is transmitted to one of the other mobile stations UE and the stationary AP 200 The signal strength from the wireless terminals can be measured (S140).

Thereafter, the mobile AP 100 may select an optimal location to move based on the measured signal strength at each point. At this time. When a plurality of wireless terminals UE are connected to the fixed AP 200, an optimal movement position can be set based only on wireless terminals whose intensity of a received signal with the fixed AP 200 is lower than a reference value. In addition, even if a plurality of wireless terminals UE are connected to the fixed AP 200, it is possible to set a location except for a wireless terminal UE in which only a communication channel is actually connected and communication is not performed. Thereafter, the mobile AP 100 moves to a selected location and then switches a communication channel between the mobile terminal UE and the fixed AP 200 to the mobile AP 100 to connect the communication channel with the corresponding mobile terminal UE (S150).

If the connection of the mobile terminal UE connected to the mobile AP 100 is terminated or the charged amount of the battery of the mobile AP 100 drops after the reference value, the mobile AP 100 returns to the fixed AP 200 (S160).

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications and variations without departing from the spirit and scope of the invention. Accordingly, it is intended that the appended claims cover all such modifications and variations as fall within the true spirit of the invention.

Claims (4)

In a mobile wireless LAN AP,
A stationary AP providing a wireless LAN access point (AP) for one or more wireless terminals; And
And a mobile AP functioning as a wireless LAN multi-bridge connected to the fixed AP,
Wherein the mobile AP is coupled to the fixed AP and is moved to a position adjacent to the wireless terminal when the intensity of the signal received from the wireless terminal connected to the fixed AP is less than a reference value, AP,
A mobile wireless LAN access point device. The method according to claim 1,
The mobile AP sets one or more sample points for the shadowed area, moves the sample point based on the strength of the received signal of the wireless terminal or an indication of the user, And the position to be moved is selected according to the measurement result,
A mobile wireless LAN access point device. A mobile AP for providing a wireless LAN access point (AP) at an arbitrary position separated from a fixed AP,
A drive control unit controlling one or more drive means to move to an arbitrary position;
A communication unit connected to the fixed AP and one or more wireless terminals at a movement position and relaying a reception signal from the wireless terminal to the fixed AP; And
And a path management unit for determining the movement position and the movement path based on the strength of the received signal from the wireless terminal.
Mobile AP. The method of claim 3,
Wherein the path management unit moves the predetermined one or more sample points and measures the strength of a received signal from the wireless terminal at each sample point,
Mobile AP.
KR1020150077523A 2015-06-01 2015-06-01 Movable Wireless LAN AP Apparatus KR101699068B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106912062A (en) * 2017-03-31 2017-06-30 思依暄机器人科技（深圳）有限公司 A kind of motion control method, device and mobile wireless trunking

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003181783A (en) * 2001-12-17 2003-07-02 Fuji Photo Film Co Ltd Information communication apparatus
KR20090002363A (en) * 2007-06-28 2009-01-09 주식회사 케이티 Intelligent repeater for ultra wide band performance and signal repeating method in its

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003181783A (en) * 2001-12-17 2003-07-02 Fuji Photo Film Co Ltd Information communication apparatus
KR20090002363A (en) * 2007-06-28 2009-01-09 주식회사 케이티 Intelligent repeater for ultra wide band performance and signal repeating method in its

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106912062A (en) * 2017-03-31 2017-06-30 思依暄机器人科技（深圳）有限公司 A kind of motion control method, device and mobile wireless trunking

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