WO2014025247A1 - A wireless access point having a system for controlling connection of client devices - Google Patents

A wireless access point having a system for controlling connection of client devices Download PDF

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Publication number
WO2014025247A1
WO2014025247A1 PCT/MY2013/000132 MY2013000132W WO2014025247A1 WO 2014025247 A1 WO2014025247 A1 WO 2014025247A1 MY 2013000132 W MY2013000132 W MY 2013000132W WO 2014025247 A1 WO2014025247 A1 WO 2014025247A1
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WO
WIPO (PCT)
Prior art keywords
access point
module
wireless access
client devices
transmission queue
Prior art date
Application number
PCT/MY2013/000132
Other languages
French (fr)
Inventor
Haseeb Shariq
Sivanand Sridhar
Ramanathan THILLAI RAJ A/L T.
Original Assignee
Mimos Berhad
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 Mimos Berhad filed Critical Mimos Berhad
Publication of WO2014025247A1 publication Critical patent/WO2014025247A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/02—Access restriction performed under specific conditions
    • H04W48/06—Access restriction performed under specific conditions based on traffic conditions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • the present invention generally relates to a wireless access point and more particularly to a wireless access point having a system for controlling connection of client devices to the wireless access point.
  • a wireless access point allows one or more client devices to access a network.
  • the resources of the wireless access point are scarce.
  • the wireless access point may run out of resources to support all of the client devices.
  • the wireless access point may still be accepting connections from new client devices, although the wireless access point has run out of resources. This is due to the wireless access point does not restrict or control the number of client devices connecting to it. Thus, this degrades the performance of the overwhelmed wireless access point in serving the existing client devices and new client devices as they connect.
  • US Patent Publication No. 2011/0103230 discloses a method for balancing client load on an access point in a wireless digital network.
  • the access point tracks the number of connected users and accepts new connections only if the number of connected users is below a preset threshold.
  • the number of connected users may be tracked on an access point wide basis, a per- band basis, a per-BSSID basis, or a combination.
  • accepting new connections may be done on an access point wide basis, a per-band basis, a per- BSSID basis, on the basis of client 802.11 capabilities, or a combination.
  • Such method only limits the connection to the access point based on the number of client devices connected to the access point. Thus, if only a couple of client devices are connected to the access point and are extensively utilizing the resources of the access point, the wireless access point may not be able to adequately serve other client devices even though the number of connected client devices has not exceeded the threshold.
  • the present invention relates to a wireless access point.
  • the wireless access point comprises of a backhaul module (110) for communicating with a backhaul network, and an access module (120) for communicating with at least one client device.
  • the wireless access point is characterised in that it further includes at least one queue overflow measurement module (130) for monitoring at least one transmission queue of the wireless access point; a resource measurement module (140) for measuring and monitoring resource utilization; a controller module (150) configured for determining whether to broadcast service set identifier (SSID) or hide the SSID based on the resource utilization and the at least one transmission queue, and restricting the connection of the access module (120) to only the client devices listed in an access control list when high resource utilization or transmission queue overflow is detected; and an access list storage module (160) for storing the access control list.
  • SSID broadcast service set identifier
  • the present invention also provides a method for controlling connection of client devices to the abovementioned wireless access point.
  • the method is characterised by the steps of broadcasting a service set identifier (SSID) by the wireless access point, and determining whether resource utilization or transmission queue exceeds a predetermined maximum threshold by using the queue overflow measurement module (130) and the resource measurement module (140); notifying the controller module (150) to indicate queue overflow or low available resources if the resource utilization or transmission queue exceeds the predetermined maximum threshold; extracting an access control list from the access list storage module (160) by the controller module (150); instructing the access module (120) by the controller module (150) to restrict the connection to the wireless access point based on the access control list; triggering the access module (120) to hide the SSID; and serving the client devices listed in the access control list by the wireless access point, and hiding the SSID until the transmission queue and resource utilization are below a predetermined minimum threshold.
  • SSID service set identifier
  • the present invention also provides a method for controlling connection of client devices to a wireless access point.
  • the method is characterised by the steps of determining whether the wireless access point has low available resources or transmission queue overflow; extracting a list of connected client devices if the wireless access point has low available resources or transmission queue overflow; and restricting the connection of the wireless access point to only the client devices as listed in the list of connected client devices and hiding SSID of the wireless access point until adequate resources are available and there is no transmission queue overflow.
  • the present invention prevents performance degradation in a wireless access point. Moreover, the present invention improves quality of service or QoS for client devices connected to the wireless access point.
  • FIG. 1 is a block diagram of a wireless access point having a system for controlling connection of client devices according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of a method for controlling connection of client devices to a wireless access point according to an embodiment of the present invention.
  • FIG. 1 there is shown a block diagram of a wireless access point having a system for controlling connection of client devices.
  • the access point generally comprises of a backhaul module (110) for communicating with a backhaul network, and an access module (120) for communicating with one or more client devices.
  • the access module (120) broadcasts a Service Set Identifier or SSID to allow the client devices to connect to the wireless access point and thus, allowing the client devices to access the backhaul network.
  • the wireless access point further includes a system for controlling connection of the client devices.
  • the system allows the wireless access point to limit the number of client devices connecting to it whenever the wireless access point has low resources or overflow of transmission queue.
  • the system comprises of two queue overflow measurement module (130), a resource measurement module (140), a controller module (150), and an access list storage module (160).
  • the queue overflow measurement modules (130) are configured to monitor transmission queues of the wireless access point.
  • a first queue overflow measurement module (130a) resides at the backhaul module (110) to monitor the queue for transmitting packets to the backhaul network.
  • a second queue overflow measurement module (130b) resides at the access module (120) to monitor the queue for transmitting packets to the client devices.
  • Both queue overflow measurement modules (130) are connected to the controller module (150) to notify the controller module (150) if a queue overflow is detected.
  • the resource measurement module (140) is configured to measure and monitor resource utilization of the wireless access point. Such resources being measured and monitored include central processing unit (CPU), memory, interrupt request lines (IRQs) and etc. If the measured resource utilization of the access point exceeds a predetermined threshold, the resource measurement module (140) informs the controller module (150) that the wireless access point has low available resources.
  • CPU central processing unit
  • IRQs interrupt request lines
  • the controller module (150) is configured to determine whether to broadcast the SSID or hide the SSID based on the resource utilization and transmission queue of the wireless access point. Moreover, the controller module (150) stores an updated access control list in the access list storage module (160).
  • the access control list is a list of client devices that are currently connected to the wireless access point. Preferably, the access control list contains the MAC addresses of those client devices connected to the wireless access point.
  • the access control list is sent by the access module (120) and it is updated by the access module (120) whenever a new client device has successfully established a connection with the wireless access point or a client device has disconnected from the wireless access point.
  • the controller module (150) uses the access control list to restrict the connection of the access module (120) to only the client devices listed in the access control list whenever high resource utilization and/or transmission queue overflow are detected by the resource measurement module (140) and queue overflow measurement modules (130) respectively.
  • the wireless access point serves all client devices connected to its access module (120) and allows new client devices to connect to its access module (120) by broadcasting its SSID.
  • the queue overflow measurement modules (130) determine whether either one of the transmission queues has exceeded a predetermined maximum threshold or not.
  • the resource measurement module (140) measures the resource utilization of the wireless access point and determines whether the measured resource utilization exceeds a predetermined maximum threshold.
  • the wireless access point continues to serve all client devices connected to its access module (120) while broadcasting its SSID until the transmission queues or the resource utilization has exceeded the maximum threshold as in decision 202 and step 201. If the transmission queue of the backhaul module (110) or the transmission queue of the access module (120) exceeds the maximum threshold, the queue overflow measurement module (130) notifies the controller module (150) that there is a queue overflow detected at the backhaul module (110) or the access module (120) as in decision 202 and step 203. Moreover, if the measured resource utilization exceeds the maximum threshold, the resource measurement module (140) notifies the controller module (150) that the wireless access point has low available resources.
  • the controller module (150) extracts the access control list from the access list storage module (160) as in step 204.
  • the controller module (150) implements the access control list to restrict the connection of the wireless access point to only the client devices listed in the access control list.
  • the controller module (150) instructs the access module (120) to only accept communication from the MAC addresses listed in the access control list.
  • the access module (120) blocks connection from any other client devices unless it is listed in the access control list.
  • step 206 the controller module (150) triggers the access module (120) to hide the SSID so as to prevent new client devices from attempting to connect to the wireless access point.
  • step 207 the wireless access point only serves the client devices listed in the access control list and hides its SSID.
  • the queue overflow measurement modules (130) and resource measurement module (140) determine whether the transmission queues and resource utilization are below a predetermined minimum threshold.
  • the queue overflow measurement modules (130) and resource measurement module (140) sends a notification to the controller module (150) and thereon, the controller module (150) disables the connection restriction as in decision 208 and step 209. Subsequently, the controller module (150) triggers the access module (120) to unhide the SSID as in step 210. Thus, the SSID is broadcasted again to allow new client devices to connect to the wireless access point as in step 201.
  • the wireless access point continues to only serve the client devices listed in the access control list while hiding its SSI D until the transmission queues and the resource utilization have gone below the minimum threshold (decision 207 and step 206).
  • the system comprises of two queue overflow measurement modules (130), it is appreciated by a person skilled in the art that the system may have only one queue overflow measurement module (130) connected to the backhaul module (110) and the access module (120) in order to monitor the transmission queues.

Abstract

The present invention relates to a wireless access point. The access point comprises of a backhaul module (110), an access module (120), and a system for controlling connection of the client devices. The system allows the wireless access point to limit the number of client devices connecting to it whenever the wireless access point has low available resources or overflow of transmission queue. The system includes at least one queue overflow measurement module (130), a resource measurement module (140), a controller module (150), and an access list storage module (160).

Description

A WIRELESS ACCESS POINT HAVING A SYSTEM FOR CONTROLLING CONNECTION OF CLIENT DEVICES
FIELD OF INVENTION
The present invention generally relates to a wireless access point and more particularly to a wireless access point having a system for controlling connection of client devices to the wireless access point.
BACKGROUND OF THE INVENTION
A wireless access point allows one or more client devices to access a network. However, the resources of the wireless access point are scarce. Thus, if too many client devices are connected to the wireless access point, the wireless access point may run out of resources to support all of the client devices. Moreover, the wireless access point may still be accepting connections from new client devices, although the wireless access point has run out of resources. This is due to the wireless access point does not restrict or control the number of client devices connecting to it. Thus, this degrades the performance of the overwhelmed wireless access point in serving the existing client devices and new client devices as they connect.
In view of this, US Patent Publication No. 2011/0103230 discloses a method for balancing client load on an access point in a wireless digital network. The access point tracks the number of connected users and accepts new connections only if the number of connected users is below a preset threshold. The number of connected users may be tracked on an access point wide basis, a per- band basis, a per-BSSID basis, or a combination. Similarly, accepting new connections may be done on an access point wide basis, a per-band basis, a per- BSSID basis, on the basis of client 802.11 capabilities, or a combination.
Such method only limits the connection to the access point based on the number of client devices connected to the access point. Thus, if only a couple of client devices are connected to the access point and are extensively utilizing the resources of the access point, the wireless access point may not be able to adequately serve other client devices even though the number of connected client devices has not exceeded the threshold.
Therefore, there is a need to address the abovementioned drawbacks of a wireless access point.
SUMMARY OF INVENTION
The present invention relates to a wireless access point. The wireless access point comprises of a backhaul module (110) for communicating with a backhaul network, and an access module (120) for communicating with at least one client device. Moreover, the wireless access point is characterised in that it further includes at least one queue overflow measurement module (130) for monitoring at least one transmission queue of the wireless access point; a resource measurement module (140) for measuring and monitoring resource utilization; a controller module (150) configured for determining whether to broadcast service set identifier (SSID) or hide the SSID based on the resource utilization and the at least one transmission queue, and restricting the connection of the access module (120) to only the client devices listed in an access control list when high resource utilization or transmission queue overflow is detected; and an access list storage module (160) for storing the access control list.
The present invention also provides a method for controlling connection of client devices to the abovementioned wireless access point. The method is characterised by the steps of broadcasting a service set identifier (SSID) by the wireless access point, and determining whether resource utilization or transmission queue exceeds a predetermined maximum threshold by using the queue overflow measurement module (130) and the resource measurement module (140); notifying the controller module (150) to indicate queue overflow or low available resources if the resource utilization or transmission queue exceeds the predetermined maximum threshold; extracting an access control list from the access list storage module (160) by the controller module (150); instructing the access module (120) by the controller module (150) to restrict the connection to the wireless access point based on the access control list; triggering the access module (120) to hide the SSID; and serving the client devices listed in the access control list by the wireless access point, and hiding the SSID until the transmission queue and resource utilization are below a predetermined minimum threshold.
The present invention also provides a method for controlling connection of client devices to a wireless access point. The method is characterised by the steps of determining whether the wireless access point has low available resources or transmission queue overflow; extracting a list of connected client devices if the wireless access point has low available resources or transmission queue overflow; and restricting the connection of the wireless access point to only the client devices as listed in the list of connected client devices and hiding SSID of the wireless access point until adequate resources are available and there is no transmission queue overflow.
Advantageously, the present invention prevents performance degradation in a wireless access point. Moreover, the present invention improves quality of service or QoS for client devices connected to the wireless access point.
BRIEF DESCRIPTION OF THE DRAWINGS
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
FIG. 1 is a block diagram of a wireless access point having a system for controlling connection of client devices according to an embodiment of the present invention.
FIG. 2 is a flowchart of a method for controlling connection of client devices to a wireless access point according to an embodiment of the present invention.
DESCRIPTION OF THE PREFFERED EMBODIMENT
A preferred embodiment of the present invention will be described herein below with reference to the accompanying drawings. In the following description, well known functions or constructions are not described in detail since they would obscure the description with unnecessary detail. Referring to FIG. 1 , there is shown a block diagram of a wireless access point having a system for controlling connection of client devices. The access point generally comprises of a backhaul module (110) for communicating with a backhaul network, and an access module (120) for communicating with one or more client devices. The access module (120) broadcasts a Service Set Identifier or SSID to allow the client devices to connect to the wireless access point and thus, allowing the client devices to access the backhaul network. The wireless access point further includes a system for controlling connection of the client devices. The system allows the wireless access point to limit the number of client devices connecting to it whenever the wireless access point has low resources or overflow of transmission queue. The system comprises of two queue overflow measurement module (130), a resource measurement module (140), a controller module (150), and an access list storage module (160). The queue overflow measurement modules (130) are configured to monitor transmission queues of the wireless access point. A first queue overflow measurement module (130a) resides at the backhaul module (110) to monitor the queue for transmitting packets to the backhaul network. A second queue overflow measurement module (130b) resides at the access module (120) to monitor the queue for transmitting packets to the client devices. Both queue overflow measurement modules (130) are connected to the controller module (150) to notify the controller module (150) if a queue overflow is detected.
The resource measurement module (140) is configured to measure and monitor resource utilization of the wireless access point. Such resources being measured and monitored include central processing unit (CPU), memory, interrupt request lines (IRQs) and etc. If the measured resource utilization of the access point exceeds a predetermined threshold, the resource measurement module (140) informs the controller module (150) that the wireless access point has low available resources.
The controller module (150) is configured to determine whether to broadcast the SSID or hide the SSID based on the resource utilization and transmission queue of the wireless access point. Moreover, the controller module (150) stores an updated access control list in the access list storage module (160). The access control list is a list of client devices that are currently connected to the wireless access point. Preferably, the access control list contains the MAC addresses of those client devices connected to the wireless access point. The access control list is sent by the access module (120) and it is updated by the access module (120) whenever a new client device has successfully established a connection with the wireless access point or a client device has disconnected from the wireless access point. The controller module (150) uses the access control list to restrict the connection of the access module (120) to only the client devices listed in the access control list whenever high resource utilization and/or transmission queue overflow are detected by the resource measurement module (140) and queue overflow measurement modules (130) respectively.
Referring now to FIG. 2, there is shown a method for controlling connection of client devices to the wireless access point. Initially, as in step 201, the wireless access point serves all client devices connected to its access module (120) and allows new client devices to connect to its access module (120) by broadcasting its SSID. Simultaneously, the queue overflow measurement modules (130) determine whether either one of the transmission queues has exceeded a predetermined maximum threshold or not. Moreover, the resource measurement module (140) measures the resource utilization of the wireless access point and determines whether the measured resource utilization exceeds a predetermined maximum threshold.
If the transmission queues and the resource utilization are below the maximum threshold, the wireless access point continues to serve all client devices connected to its access module (120) while broadcasting its SSID until the transmission queues or the resource utilization has exceeded the maximum threshold as in decision 202 and step 201. If the transmission queue of the backhaul module (110) or the transmission queue of the access module (120) exceeds the maximum threshold, the queue overflow measurement module (130) notifies the controller module (150) that there is a queue overflow detected at the backhaul module (110) or the access module (120) as in decision 202 and step 203. Moreover, if the measured resource utilization exceeds the maximum threshold, the resource measurement module (140) notifies the controller module (150) that the wireless access point has low available resources.
Once the controller module (150) has received the notification from either the queue overflow measurement modules (130) or the resource measurement module (140), the controller module (150) extracts the access control list from the access list storage module (160) as in step 204.
Thereon, as in step 205, the controller module (150) implements the access control list to restrict the connection of the wireless access point to only the client devices listed in the access control list. In particular, the controller module (150) instructs the access module (120) to only accept communication from the MAC addresses listed in the access control list. Thus, the access module (120) blocks connection from any other client devices unless it is listed in the access control list.
In step 206, the controller module (150) triggers the access module (120) to hide the SSID so as to prevent new client devices from attempting to connect to the wireless access point. In step 207, the wireless access point only serves the client devices listed in the access control list and hides its SSID. Simultaneously, the queue overflow measurement modules (130) and resource measurement module (140) determine whether the transmission queues and resource utilization are below a predetermined minimum threshold.
If the transmission queues and the resource utilization have gone below the minimum threshold, the queue overflow measurement modules (130) and resource measurement module (140) sends a notification to the controller module (150) and thereon, the controller module (150) disables the connection restriction as in decision 208 and step 209. Subsequently, the controller module (150) triggers the access module (120) to unhide the SSID as in step 210. Thus, the SSID is broadcasted again to allow new client devices to connect to the wireless access point as in step 201. However, if either the transmission queue of the backhaul module (110), the transmission queue of the access module (120), or the resource utilization is still above the minimum threshold, the wireless access point continues to only serve the client devices listed in the access control list while hiding its SSI D until the transmission queues and the resource utilization have gone below the minimum threshold (decision 207 and step 206).
Although described in the description that the system comprises of two queue overflow measurement modules (130), it is appreciated by a person skilled in the art that the system may have only one queue overflow measurement module (130) connected to the backhaul module (110) and the access module (120) in order to monitor the transmission queues.
While embodiments of the invention have been illustrated and described, it is not intended that these embodiments illustrated and describe all possible forms of the invention. Rather, the words used in the specifications are words of description rather than limitation and various changes may be made without departing from the scope of the invention.

Claims

1. A wireless access point comprising
a) a backhaul module (110) for communicating with a backhaul network, and an access module (120) for communicating with at least one client device; wherein the wireless access point is characterised in that it further includes: c) at least one queue overflow measurement module (130) for monitoring at least one transmission queue of the wireless access point; d) a resource measurement module (140) for measuring and monitoring resource utilization; e) a controller module (150) configured for:
i. determining whether to broadcast service set identifier (SSID) or hide the SSID based on the resource utilization and the at least one transmission queue, and ii. restricting the connection of the access module (120) to only the client devices listed in an access control list when high resource utilization or transmission queue overflow is detected; and f) an access list storage module (160) for storing the access control list.
2. A method for controlling connection of client devices to the wireless access point as claimed in claim 1 is characterised by the steps of:
a) broadcasting a service set identifier (SSID) by the wireless access point, and determining whether resource utilization or transmission queue exceeds a predetermined maximum threshold by using the queue overflow measurement module (130) and the resource measurement module (140) respectively; b) notifying the controller module (150) to indicate queue overflow or low available resources if the resource utilization or transmission queue exceeds the predetermined maximum threshold; c) extracting an access control list from the access list storage module (160) by the controller module (150); d) instructing the access module (120) by the controller module (150) to restrict the connection to the wireless access point based on the access control list; e) triggering the access module (120) to hide the SSID; and f) serving the client devices listed in the access control list by the wireless access point, and hiding the SSID until the transmission queue and resource utilization are below a predetermined minimum threshold.
A method for controlling connection of client devices to a wireless access point is characterised by the steps of:
a) determining whether the wireless access point has low available resources or transmission queue overflow; b) extracting a list of connected client devices if the wireless access point has low available resources or transmission queue overflow; and c) restricting the connection of the wireless access point to only the client devices listed in the list of connected client devices and hiding SSID of the wireless access point until adequate resources are available and there is no transmission queue overflow.
PCT/MY2013/000132 2012-08-07 2013-07-23 A wireless access point having a system for controlling connection of client devices WO2014025247A1 (en)

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CN106572488B (en) * 2016-11-02 2021-01-08 捷开通讯(深圳)有限公司 WIFI hotspot sharing method of terminal equipment and terminal equipment

Citations (3)

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Publication number Priority date Publication date Assignee Title
US20040095942A1 (en) * 2002-11-18 2004-05-20 Institute For Information Industry System and method for balancing load in a wireless LAN
US20050135316A1 (en) * 2003-12-19 2005-06-23 International Business Machines Corporation Autonomic load balancing in wireless local area networks
US20110103230A1 (en) 2009-10-30 2011-05-05 Iyer Pradeep J Balancing Clients Across Bands in a Single Access Point

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040095942A1 (en) * 2002-11-18 2004-05-20 Institute For Information Industry System and method for balancing load in a wireless LAN
US20050135316A1 (en) * 2003-12-19 2005-06-23 International Business Machines Corporation Autonomic load balancing in wireless local area networks
US20110103230A1 (en) 2009-10-30 2011-05-05 Iyer Pradeep J Balancing Clients Across Bands in a Single Access Point

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