KR100963512B1 - System for overall controlling a plurality of wireless LAN module and method thereof - Google Patents

System for overall controlling a plurality of wireless LAN module and method thereof Download PDF

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KR100963512B1
KR100963512B1 KR1020080053021A KR20080053021A KR100963512B1 KR 100963512 B1 KR100963512 B1 KR 100963512B1 KR 1020080053021 A KR1020080053021 A KR 1020080053021A KR 20080053021 A KR20080053021 A KR 20080053021A KR 100963512 B1 KR100963512 B1 KR 100963512B1
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South Korea
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terminal
communication
plurality
wireless lan
modules
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KR1020080053021A
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Korean (ko)
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KR20090126752A (en
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강병기
박영수
안창영
이상욱
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(주)크리웨이브
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
    • H04W72/12Dynamic Wireless traffic scheduling ; Dynamically scheduled allocation on shared channel
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
    • H04W72/04Wireless resource allocation
    • H04W72/10Wireless resource allocation where an allocation plan is defined based on priority criteria
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access, e.g. scheduled or random access
    • H04W74/08Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0866Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a dedicated channel for access
    • H04W74/0875Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a dedicated channel for access with assigned priorities based access
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08Access point devices
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THIR OWN ENERGY USE
    • Y02D70/00Techniques for reducing energy consumption in wireless communication networks

Abstract

In the integrated control system of a plurality of wireless LAN modules according to the present invention, even if the terminals transmit or receive data through the plurality of wireless LAN modules, each terminal may have an equal communication opportunity, reduce interference between terminals, and communication performance In order to further improve the present invention, a wireless LAN module interface for interworking with the plurality of wireless LAN modules and the protocol layer above to achieve the above object; An input queue waiting to process data frames input from the plurality of WLAN modules; A terminal list database storing information on a wireless terminal to communicate with via the plurality of WLAN modules; An output queue for storing data frames to allow wireless terminals for communication requests from the wireless terminals; And a scheduler configured to read the data frames queued in the input queue and to manage the terminal list database and give priority to wireless terminals.
According to the present invention as described above, by performing the integrated control and scheduling for a plurality of wireless LAN modules, each terminal can have an equal communication opportunity, can reduce the interference between the terminals, it is possible to further improve the communication performance.
Wireless terminal, WLAN module, priority, scheduler, queue

Description

System for overall controlling a plurality of wireless LAN modules and method

The present invention relates to an integrated control system and a method of a plurality of wireless LAN modules, and in particular, even though the terminals transmit and receive data through the plurality of wireless LAN modules, each terminal may have an equal communication opportunity, and interference between terminals. The present invention relates to an integrated control system and a method of a plurality of wireless LAN modules that can further reduce and improve communication performance.

Conventional WLAN application techniques are difficult to provide equal communication opportunities to each terminal when multiple (eg, 20 or more) terminals communicate through one access point (AP). In addition, when using the same frequency band when using a plurality of wireless LAN module will cause a lot of interference and degradation of communication speed due to mutual collision.

In general, in order to control a device having a plurality of wireless LAN modules, it has a system configuration as shown in Figure 1, one main processor 110, Ethernet (ethernet) (120) for one wired communication And has an interface for communication with the plurality of WLAN modules 130.

The flow of control and data for communication in such a system is shown in FIG. 2. As shown in FIG. 2, data transmitted from each WLAN module is transferred to a higher protocol layer of a wire or a device itself through an L2 bridge. At this time, the data flow is processed in the form of FIFO (First-In First-Out), and the data received first by the L2 bridge is processed first.

However, in the general communication system as described above, when a plurality of terminals are connected to other wireless LAN modules to perform communication at the same time, the overall communication performance decreases due to competition for obtaining a communication channel between the terminals, and a free competition communication method. Due to the characteristics of the wireless LAN based on the above, there is a problem in that a relatively small communication opportunity is obtained or a terminal which does not acquire a communication opportunity at all occurs.

The present invention has been made in view of the above-mentioned matters, and by performing the integrated control and scheduling (scheduling) for a plurality of wireless LAN modules, even if the terminals transmit and receive data through a plurality of wireless LAN modules evenly each terminal An object of the present invention is to provide an integrated control system and method for a plurality of wireless LAN modules that can have a communication opportunity, reduce interference between terminals, and further improve communication performance.

In order to achieve the above object, the integrated control system of a plurality of wireless LAN module according to the present invention,

A system for integrating and controlling a plurality of WLAN modules, wherein the system is located at an application layer above an protocol layer of a communication system having a plurality of WLAN modules.

A wireless LAN module interface as a device driver for interworking with the plurality of wireless LAN modules and the protocol layer above;

An input queue waiting to process data frames input from the plurality of WLAN modules;

A terminal list database storing information on a wireless terminal to communicate with via the plurality of WLAN modules;

An output queue for storing data frames to allow wireless terminals for communication requests from the wireless terminals; And

It is characterized in that it comprises a scheduler (scheduler) for reading the data frame waiting in the input queue to give priority to the management of the terminal list database and the wireless terminal.

Here, the WLAN module interface has a function of continuously monitoring whether data exists in the output queue in real time.

The information on the wireless terminal stored in the terminal list database may include an ID of the terminal, a type of the terminal, a priority level, an initial access time, and a number of communication allowances.

In addition, the scheduler reads a data frame waiting in the input queue, and if the information of the read data frame is information from a terminal to be newly registered, information about the terminal is registered in the terminal list database. The communication permission level is determined according to the policy of the set priority and stored in the output queue.

In addition, in order to achieve the above object, the integrated control method of a plurality of wireless LAN module according to the present invention,

The plurality of WLAN modules of a communication system having a plurality of WLAN modules, by an integrated control system of a plurality of WLAN modules having a WLAN module interface, an input queue, a terminal list database, an output queue, and a scheduler As a method of integrated control of

The terminal receives information about the new terminal by a scheduler of an integrated control system of the plurality of WLAN modules according to transmission of information according to connection of a new terminal by one of the plurality of WLAN modules. Adding to the list database;

In response to a communication permission request of a wireless terminal through any one of the plurality of wireless LAN modules, the scheduler searches the terminal list database to determine a priority level of the corresponding terminal, and the information on the communication permission. Transmitting to the wireless LAN module; And

It is characterized in that it comprises the step of allowing the communication of the terminal by the wireless LAN module receiving the communication permission information of the terminal from the scheduler.

Here, the determination of the priority level of the corresponding terminal by the scheduler may give a high priority to a terminal having a small number of communication requests or a relatively high priority according to the characteristics of the terminal.

When a high priority is given to a terminal having a small number of communication requests, a limit is placed on the maximum number of communication allowances per second of a dynamically selected terminal to lower the priority of a terminal that exceeds or closes the allowable number of communications. It is a method of giving a high priority to a terminal with few.

In case of giving a relatively high priority according to the nature of the terminal, three priority levels according to the characteristics of the terminals participating in the communication are given (for example, a specific institution of a country such as the Blue House, the National Intelligence Service, the prosecution service, etc.). Are given the highest priority), and if the terminals having the same priority level try to acquire communication authority at the same time, they are processed in the form of FIFO (First-In First-Out), and the terminals having two different priorities. When the mobile station attempts to acquire the communication right, it is a method of preferentially giving the communication right to a terminal having a high priority.

Further, in determining the priority level of the terminal by the scheduler, the level of permission according to the priority is determined by referring to the list of communication requests from other terminals.

In addition, the transfer of the communication permission information to the WLAN module, the communication permission information is first stored in the communication permission list queue for a plurality of terminals, and the communication is sequentially allowed according to the storage order.

According to the present invention, by performing the integrated control and scheduling (scheduling) for a plurality of wireless LAN module, even if the terminal through a plurality of wireless LAN module data transmission / reception, each terminal can have an equal communication opportunity Therefore, interference between terminals can be reduced, and communication performance can be further improved.

In addition, the wireless LAN technology can be applied to a region that was determined to be impossible due to a decrease in the efficiency of a service for a certain number of terminals (eg, 20 or more terminals). The system can be implemented on a stable WLAN base at a relatively low cost.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 and 4 illustrate an integrated control system of a plurality of wireless LAN modules according to the present invention. FIG. 3 is a diagram illustrating a state applied to a communication system, and FIG. 4 is a diagram illustrating an internal configuration of the system.

3 and 4, the integrated control system 300 of a plurality of WLAN modules according to the present invention is an application layer higher than a protocol layer of a communication system having a plurality of WLAN modules 130. Located in the system to control the plurality of wireless LAN module 130, the wireless LAN module interface 310, the input queue (320), the terminal list database 330, the output queue 340, the scheduler And 350.

The WLAN module interface 310 serves as a device driver for interworking with the plurality of WLAN modules 130 and the protocol layer above. The WLAN module interface 310 also has a function of continuously monitoring whether data exists in the output queue 340 in real time.

In addition, the WLAN module interface 310 transmits the data frame stored in the output queue 340 to the WLAN module 130 to which the corresponding terminal is connected. In this case, the order of transmitting the data frames stored in the output queue 340 is processed first of high priority. That is, if a data frame exists in "Queue 1", it is processed first, and the data frame of the next level queue is processed.

The input queue 320 waits for processing of data frames input from the plurality of WLAN modules 130.

The terminal list database 330 stores information on a wireless terminal to communicate with via the plurality of wireless LAN modules 310. The information on the wireless terminal stored in the terminal list database 330 may include an ID of the terminal, a type of the terminal, a priority level, an initial access time, and a number of communication allowances.

The output queues (Queues 1, 2, 3) 340 store data frames to allow wireless terminals for communication requests of the wireless terminals.

The scheduler 350 reads data frames waiting in the input queue 320 and gives priority to the management of the terminal list database 330 and the wireless terminal. The scheduler 350 also reads a data frame waiting in the input queue 320, and if the information of the read data frame is information from a terminal to be newly registered, the terminal list database. In operation 330, the communication permission level is determined according to a policy of a preset priority and stored in the output queue 340.

Then, the integrated control method of the plurality of WLAN modules by the integrated control system of the plurality of WLAN modules according to the present invention having the above configuration will be described with reference to FIG. 5.

Referring to FIG. 5, first, the wireless terminal 100 is a connection process for communication with the wireless LAN module 130 (eg, wireless LAN module 1), and the wireless terminal 100 is connected to the wireless LAN module 130. When the request is transmitted, the WLAN module 130 checks whether or not the authentication is performed to perform the access. At this time, the access procedure follows the method in the wireless LAN (step ①).

When a new terminal is connected, the wireless LAN module 130 transmits information on the terminal to the integrated control system 300 of the plurality of higher-level wireless LAN modules. Accordingly, the scheduler 350 of the integrated control system 300 of the plurality of WLAN modules receiving the information on the new terminal adds this information to the terminal list database 330 (step ②).

In addition, when communication is required in the terminal 100, the wireless LAN module 130 requests a resource necessary for communication (step ③).

When there is a communication request from the terminal 100, the WLAN module 130 transmits the request to the integrated control system 300 of the plurality of WLAN modules before allowing the communication to determine whether to allow communication of the terminal. Perform the process of obtaining permission (step ④).

That is, when a communication permission request of the wireless terminal 100 is transmitted through any one of the plurality of wireless LAN modules (here, it is defined as RF 1 module for convenience), the integrated control system 300 of the plurality of wireless LAN modules The scheduler 350 searches the terminal list database 330 to determine a priority level of the corresponding terminal, and transmits information on a communication permission to the WLAN module (step ⑤). Here, the determination of the priority level of the corresponding terminal by the scheduler 350 may give a high priority to a terminal having a small number of communication requests, or may give a relatively high priority according to the characteristics of the terminal.

That is, when a high priority is given to a terminal having a small number of communication requests, a limit is placed on the maximum allowable number of communication per second of the dynamically selected terminal to lower the priority of a terminal that exceeds or closes the allowable number of times. As a method of giving a high priority to a terminal with a small number of requests, it is possible to give an equal communication opportunity.

In addition, in the case of granting a relatively high priority according to the nature of the terminal to give three priority levels according to the nature of the terminals participating in the communication (for example, the Blue House, the National Intelligence Service, the prosecution, etc. The terminal of a specific institution is given the highest priority), and if the terminal with the same priority level wants to acquire the communication authority at the same time, it is processed in the form of FIFO (First-In First-Out), and two different priorities are treated. When the mobile station has attempted to acquire the communication right, it is a method of preferentially granting the communication right to the high priority terminal.

The prioritization method according to the communication request number and the prioritization method according to the characteristics of the terminal may be used separately or may be used together.

In addition, in determining the priority level of the terminal by the scheduler 350, the level of permission according to the priority is determined by referring to the list of communication requests from other terminals. In addition, the transfer of the communication permission information to the wireless LAN module 130, the communication permission information is first stored in the communication permission list queue (output queue) 340 for a plurality of terminals, and the communication is sequentially allowed according to the storage order. do. In this case, the WLAN module interface 310 continuously monitors whether data exists in the output queue 340 in real time.

When the communication permission information of the terminal is transmitted from the integrated control system 300 of the plurality of WLAN modules to the WLAN module 130 by the above, the WLAN module 130 allows communication of the corresponding terminal using this information. (Step ⑥).

The wireless terminal allowed to communicate performs communication within an allowable range (eg, the number of communication allowances) according to the characteristics of the terminal (step ⑦).

As described above, according to the present invention, by performing integrated control and scheduling of a plurality of WLAN modules, even though the terminals transmit / receive data through the plurality of WLAN modules, each terminal may have an equal communication opportunity. Therefore, interference between terminals can be reduced, and communication performance can be further improved.

In addition, the wireless LAN technology can be applied to a region that was determined to be impossible due to a decrease in the efficiency of a service for a certain number of terminals (eg, 20 or more terminals). The system can be implemented on a stable WLAN base at a relatively low cost.

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 embodiments, but, on the contrary, Accordingly, the true scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of the same should be construed as being included in the scope of the present invention.

1 is a view schematically showing the configuration of a control system of a plurality of conventional WLAN modules.

FIG. 2 is a diagram illustrating a relationship between control and data transmission for communication in the control system of FIG. 1. FIG.

3 is a view showing a state in which an integrated control system of a plurality of wireless LAN modules according to the present invention is applied to a general communication system.

4 is a diagram illustrating an internal configuration of an integrated control system of a plurality of wireless LAN modules according to the present invention.

5 is a view showing an integrated control and communication process of a plurality of WLAN modules by an integrated control system of a plurality of WLAN modules according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100 ... Wireless terminal 110 ... Main processor

120 ... Ethernet 130 ... Wireless LAN Module

300 ... (inventive) integrated control system of a plurality of WLAN modules

310 ... Wireless LAN module interface 320 ... Input queue

330 ... Terminal list database 340 ... Output queue

350 ... Scheduler

Claims (10)

  1. A system for integrating and controlling a plurality of WLAN modules, wherein the system is located at an application layer above an protocol layer of a communication system having a plurality of WLAN modules.
    A wireless LAN module interface as a device driver for interworking with the plurality of wireless LAN modules and the protocol layer above;
    An input queue waiting to process data frames input from the plurality of WLAN modules;
    A terminal list database storing information on a wireless terminal to communicate with via the plurality of WLAN modules;
    An output queue for storing data frames to an allowable wireless terminal for a communication request of the wireless terminal; And
    A scheduler configured to read data frames queued to the input queue and to manage the terminal list database and give priority to wireless terminals;
    The WLAN module interface has a function of continuously monitoring whether data exists in the output queue in real time,
    The information on the wireless terminal stored in the terminal list database includes the ID of the terminal, the type of the terminal, the priority level, the initial access time, the number of communication allowances,
    The scheduler reads a data frame waiting in the input queue, and if information of the read data frame is information from a terminal to be newly registered, registers information on the terminal in the terminal list database, and sets a preset priority. and a communication permission level is determined according to a policy of priorities and stored in the output queue.
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  3. delete
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  5. The plurality of WLAN modules of a communication system having a plurality of WLAN modules, by an integrated control system of a plurality of WLAN modules having a WLAN module interface, an input queue, a terminal list database, an output queue, and a scheduler As a method of integrated control of
    The terminal receives information about the new terminal by a scheduler of an integrated control system of the plurality of WLAN modules according to transmission of information according to connection of a new terminal by one of the plurality of WLAN modules. Adding to the list database;
    In response to a communication permission request of a wireless terminal through any one of the plurality of wireless LAN modules, the scheduler searches the terminal list database to determine a priority level of the corresponding terminal, and the information on the communication permission. Transmitting to the wireless LAN module; And
    Allowing communication of the terminal by the wireless LAN module receiving the communication permission information of the terminal from the scheduler,
    Determination of the priority level of the terminal by the scheduler gives a high priority to the terminal with a small number of communication requests, or a relatively high priority according to the characteristics of the terminal,
    When a high priority is given to a terminal having a small number of communication requests, a limit is placed on the maximum number of communication allowances per second of a dynamically selected terminal to lower the priority of a terminal that exceeds or closes the allowable number of communications. Gives a higher priority to the terminal with fewer
    In case of giving a relatively high priority according to the nature of the terminal, three priority levels are given according to the characteristics of the terminals participating in the communication, and terminals having the same priority level are trying to acquire communication authority at the same time. In the case of processing in the form of FIFO (First-In First-Out), and when the terminals having two different priorities attempt to acquire the communication right, the priority is given to the high priority device. Integrated control method of a plurality of wireless LAN module.
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  9. The method of claim 5,
    In determining the priority level of the corresponding terminal by the scheduler, referring to the list of communication requests from other terminals, the level of permission according to the priority is determined. .
  10. The method of claim 5,
    In the transmission of the communication permission information to the WLAN module, the communication permission information is first stored in the communication permission list queue for a plurality of terminals, and the communication is sequentially allowed according to the storage order. Integrated control method.
KR1020080053021A 2008-06-05 2008-06-05 System for overall controlling a plurality of wireless LAN module and method thereof KR100963512B1 (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030082392A (en) * 2002-04-17 2003-10-22 마이크로소프트 코포레이션 Power efficient channel scheduling in a wireless network

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030082392A (en) * 2002-04-17 2003-10-22 마이크로소프트 코포레이션 Power efficient channel scheduling in a wireless network

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