KR20160123902A - Method for setting the latest wireless environment configuration between ac and ap - Google Patents

Method for setting the latest wireless environment configuration between ac and ap Download PDF

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Publication number
KR20160123902A
KR20160123902A KR1020150054726A KR20150054726A KR20160123902A KR 20160123902 A KR20160123902 A KR 20160123902A KR 1020150054726 A KR1020150054726 A KR 1020150054726A KR 20150054726 A KR20150054726 A KR 20150054726A KR 20160123902 A KR20160123902 A KR 20160123902A
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South Korea
Prior art keywords
firmware
information
request message
discovery
response message
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KR1020150054726A
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Korean (ko)
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KR101687155B1 (en
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김연경
김미현
김우영
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주식회사 다산네트웍스
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0803—Configuration setting
    • H04L41/0813—Configuration setting characterised by the conditions triggering a change of settings
    • H04L41/082—Configuration setting characterised by the conditions triggering a change of settings the condition being updates or upgrades of network functionality
    • H04L61/2015—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data
    • H04W8/245—Transfer of terminal data from a network towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Disclosed is a computing technology, specifically, a technology related to a method for configuring the newest wireless environment using an access controller (AC) and an access point (AP). According to an embodiment of the present invention, the method for configuring the newest wireless environment using an AC and an AP comprises the following steps. The AP generates a discovery request message including current firmware version information thereof. The AP transmits the discovery request message to an AC to be linked thereto. The AC receiving the discovery request message compares the current firmware version information included in the discovery request message with firmware version information managed by the AC, generates a discovery response message according to a comparison result, and generates a discovery response message including firmware upgrading request information for requesting the AP to upgrade firmware thereof to the latest version of firmware when the current firmware version information is different from the firmware version information managed by the AC as the comparison result. The AC transmits the discovery response message to the AP.

Description

[0001] METHOD FOR SETTING THE LATEST WIRELESS ENVIRONMENT CONFIGURATION BETWEEN AC AND AP [0002]

A technology relating to a computing technology, specifically a method for configuring a wireless environment between an access controller (AC) and an access point (AP), is disclosed.

Generally, a firmware refers to a microprogram that controls hardware stored in a ROM. Firmware is the same as software in terms of program, but it is different from general application software in that it has close relation with hardware. That is, the firmware may have both software and hardware characteristics. For example, if you create a functioning hardware and make all the circuitry that controls it all hardware, then the structure is also very complex and even logical expressions are hard to come by. In this case, replacing a significant portion of a function with software, but with the software storing the stored memory as a central part of the hardware's control circuit, can solve the problem very simply and at low cost. The hardware software is called firmware. In this case, the firmware has a software characteristic because it does not have a separate logic circuit in terms of hardware, but the software has hardware characteristics because the microprogram controls the hardware.

On the other hand, the firmware may need to be reinstalled as a new firmware program in order to improve the performance of the electronic device or to solve the error. This is often referred to as firmware upgrade. After upgrading the firmware, a new firmware program is prepared and then a new firmware program is downloaded and installed in an appropriate manner for the corresponding electronic device. At this time, there is an inconvenience that the administrator downloads the firmware program individually for each electronic device and performs the installation.

The present invention is directed to a method for instructing firmware upgrade using a message including firmware information when transmitting and receiving a message between an AC and an AP.

Further, another task is to designate a DHCP IP allocation policy by using a message including system information upon transmission and reception of messages between AC and AP.

According to an aspect of the present invention, there is provided a method of configuring a wireless environment between an AC and an AP, the method comprising: generating a Discovery Request message including an existing firmware version information of the AP; A step of transmitting a Discovery Request message to an AC to be interworked, a step in which the AC that receives the Discovery Request message transmits the firmware version information included in the Discovery Request message and the firmware version information managed by the AC And a search response including a firmware upgrade request information for requesting an AP to upgrade to the latest version firmware if the firmware version information is different as a result of generating a discovery response message according to the comparison result, Generating a Discovery Response message, and transmitting the Discovery Response message to the AP It includes.

According to another aspect, the information communication between the AC and the AP may be performed in accordance with a wireless access point configuration specification, CAPWAP (Control And Provisioning of Wireless Access Points) protocol.

According to another aspect, in the step of generating the Discovery Request message, the AP generates a Discovery Request message including at least one of the number of firmware upgrade failure times, the reason for the latest firmware upgrade failure, ) Message. ≪ / RTI > In this case, the latest wireless environment configuration method between the AC and the AP may further include restricting the firmware upgrade attempt if the number of failed firmware upgrade failures is equal to or greater than a predetermined value.

According to another aspect, in the step of generating a discovery response message, when the firmware version information differs from the firmware version information comparison result, in order to request the AP to upgrade the firmware of the latest version to the AP, Based on the firmware upgrade request information including at least one of ID and password required according to a method of downloading the firmware, a port number for downloading the firmware, a server address for downloading the firmware, a name of the firmware file, A discovery response message can be generated.

According to another aspect, the method for configuring the latest wireless environment between the AC and the AP may further include upgrading the firmware according to the firmware upgrade request information included in the Discovery Response message received from the AC have.

According to yet another aspect, a method for configuring a wireless environment between an AC and an AP includes a step of generating a Join Request message including an AP's current system information, an AP transmitting a Join Request message The AC that has received the Join Request message allocates an allocation policy for the IP to be allocated to the terminal devices requesting connection to the AP according to the system information included in the Join Request message Generating a Join Response message including the determined DHCP IP allocation policy, and transmitting the Join Response message to the AP.

According to another aspect, in the step of generating a join request message, the AP includes at least one of the operation mode information of the AP, the IP address, the net mask information, the gateway information, the first DNS information, and the second DNS information A join request message may be generated based on the system information.

According to another aspect, in the step of generating a Join Response message, when the operation mode information of the AP indicates that the DHCP server of the AP is operating, the APs are allocated to the terminals requesting connection through the DHCP server Determine a policy for allocating IPs so that IPs do not collide, and generate a Join Response message including the determined DHCP IP allocation policies.

According to the present invention, the AP can upgrade the firmware using a message transmitted / received between the AC and the AP.

Furthermore, the DHCP IP allocation policy can be set using a message transmitted / received between the AC and the AP.

1 is a general configuration diagram of a firmware upgrade system according to an embodiment.
2 is a flowchart illustrating an initial process of configuring a wireless environment between an AC and an AP according to an exemplary embodiment of the present invention.
3 is a diagram illustrating an example of a structure of a Discovery message according to an embodiment.
4 is a diagram illustrating an example of a structure of a control message according to an embodiment.
5 is a flow diagram of a method for configuring the latest wireless environment between an AC and an AP in accordance with an embodiment.
6 is a flow diagram of a method for configuring the latest wireless environment between an AC and an AP in accordance with another embodiment.
7 is a flow diagram of a method for configuring the latest wireless environment between an AC and an AP in accordance with another embodiment.
8 is a flow diagram of a method for configuring the latest wireless environment between an AC and an AP in accordance with another embodiment.
9 is a flow diagram of a method for configuring the latest wireless environment between an AC and an AP in accordance with another embodiment.
10 is a flowchart of a method for configuring the latest wireless environment between an AC and an AP in accordance with another embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. These drawings and the embodiments are merely examples for explaining the invention, and the technical scope thereof is not limited or changed. It should also be appreciated that variations and modifications obvious to a person skilled in the art are possible within the scope of the technical idea of the proposed invention based on these examples.

1 is a general configuration diagram of a firmware upgrade system according to an embodiment.

Referring to FIG. 1, a firmware upgrade system according to an aspect includes an AC (Access Controller) 20-1, 20-2, ..., 20-k, APs 30-1-1, -1-m1, 30-2-1, ..., 30-2-m2, 30-k-1, ..., 30-k-ml. The firmware upgrade system according to another aspect may be installed in the management server 10 and / or the terminal devices 40-1-1-1, ..., 40-1-1-n1, 40-2-m2-1, ..., 40-2 -m2-n2, 40-k-mk-1, ..., 40-k-mk-mnk.

The management server 10 manages a plurality of ACs 20-1, 20-2, ..., 20-k, and the ACs are divided into a plurality of groups and managed by the APs 30-1-1, 1-m1, 30-2-1, ..., 30-2-m2, 30-k-1, ..., 30-k-ml. The APs 30-1-1 to 30-1-m1 and 30-2-1 to 30-2-m2 and 30-k-1 to 30-k- 40-2-1, ..., 40-2-m2-n2, 40-k-1, 40-2-1, mk-1, ..., 40-k-mk-mnk.

The management server 10 is connected to the ACs 20-1, 20-2, ..., 20-k by a wired or wireless network. For example, the wireless network may be a mobile communication network or a wireless Internet network (Wifi). The management server 10 provides a function of storing and distributing data for information management. Specifically, AC and AP information is stored and managed. Here, the management server 10 may include an information database in which information necessary for system operation is stored, and a middle ware that connects and relays external devices and databases.

The AC (Access Controller) 20 communicates with one or more APs (Access Points) connected to the AC. The ACs 20-1, 20-2, ..., 20-k are APs 30-1-1, ..., 30-1-m1, 30-2-1, ..., 30-2- -1, ..., 30-k-ml) in a wired or wireless network. For example, the wireless network may be a mobile communication network or a wireless Internet network (Wifi).

An AP (Access Points) 30 communicates with one or more terminal devices connected to the AP. Alternatively, APs (Access Points) 30 may communicate with one or more terminal devices requesting access to the APs.

The terminal device 40 supports the wireless Internet service of the AC 20 and the AP 30 on the network in accordance with the Control and Provision of Wireless Access Points (CAPWAP) protocol and communicates with another user terminal or an Internet server You can get the data service you need. For example, the network may be a mobile communication network or a wireless Internet network (Wifi).

The terminal 40 may be a personal mobile communication terminal, a personal digital assistant (PDA), a smart phone, a tablet, a laptop, a notebook, A terminal device such as a LAN terminal device, and the like.

2 is a flowchart illustrating an initial process of configuring a wireless environment between an AC and an AP according to an exemplary embodiment of the present invention.

Referring to FIG. 2, an initial process of configuring a wireless environment between an AC and an AP includes a search step S201, a firmware upgrade step S202, a DTLS handshake step S203, and a connection configuration step S204. The AP performs the procedure for configuring the specified AC and radio environment. The procedure by which an AP configures an AC and a wireless environment is also referred to as a provisioning procedure. In the provisioning procedure, the mutual authentication between the AP and the AC establishes mutually reliable sessions. The AC and the AP transmit data using a control packet or a data packet. A control packet transmits a control signal and transmits a wireless packet data packet.

The search step S201 is performed by transmitting and receiving a Discovery Request message and a Discovery Response message between the AC and the AP. The Discovery Request message and the Discovery Response message are the first messages for the AP to register with the AC. The Discovery Request message and the Discovery Response message are not encrypted in order to properly handle the initial operation of the standard protocol. That is, the Discovery Request message and the Discovery Response message are not encrypted by DTLS (Datagram Transport Layer Security). After the searching step S201, the AC and the AP transmit the message encrypted by the DTLS (Datagram Transport Layer Security).

In the firmware upgrade step (S202), the AP that received the discovery response message from the AC compares the currently operating firmware information with the firmware information received from the AC. If the firmware information is different as a result of comparison, the AP upgrades the firmware do.

In the DTLS handshake step (S203), the AP that receives the discovery response message from the AC receives a new port to perform the DTLS handshake and performs handshaking through the corresponding port. The port may be a UDP port.

In the connection establishment step (S204), the AC transmits a profile including environment variables capable of wireless service to the unconfigured AP. Here, an Unconfigured AP refers to an AP that is first connected to an AC or an AP that needs to receive a new profile. The AC administrator can change the settings of the AP so that the AP can receive a new profile from the AC. The AP operates using the profile transmitted from the AC. On the other hand, the AC does not send the profile to the Configured AP. That is, the AC can omit the process of transmitting the profile to the Configured AP. Configured AP means the AP that has already received a profile from AC and reconnects to the AC. At this time, the Configured AP operates using the profile that it already has.

3 is a diagram illustrating an example of a structure of a Discovery message according to an embodiment.

Referring to FIG. 3, a structure 300 of a Discovery message is divided into fields of IP Header, UDP Header, Header, Control Header, and Message Elements. The fields of the Message Elements use the format of type, length and value (TLV; Type, Length and Value). A field of a message element may include one or more message elements. These message elements can be transmitted in the form of long packets, and standard protocols can receive messages over 4096 bytes through reassembly. The Discovery message is not encrypted in order to properly handle the initial operation of the standard protocol.

According to one embodiment, the Discovery message is divided into a Discovery Request message and a Discovery Response message. The Discovery Response message is a response message to the Discovery Request message. For example, a discovery request message is generated by the AP and transmitted to the AC. A discovery response message is generated by the AC and transmitted to the AP. The Discovery Request message and the Discovery Response message are not encrypted by Datagram Transport Layer Security (DTLS).

4 is a diagram illustrating an example of a structure of a control message according to an embodiment.

Referring to FIG. 4, the structure (00) of the control message includes an IP header, a UDP header, a DTLS header, a header, a control header, a message element, and a DTLS Trlr field. The fields of the Message Elements use the format of type, length and value (TLV; Type, Length and Value). A field of a message element may include one or more message elements. These message elements can be transmitted in the form of long packets, and standard protocols can receive messages over 4096 bytes through reassembly. Control messages are encrypted differently from Discovery messages. For example, the control message is encrypted by Datagram Transport Layer Security (DTLS). According to one embodiment, only some of the fields of the Control message may be encrypted by Datagram Transport Layer Security (DTLS).

According to one embodiment, the Control message may include a Join Request message and a Join Response message. The Join Response message is a response message to the Join Request message. For example, a Join Request message is generated by the AP and transmitted to the AC. A Join Response message is generated by the AC and transmitted to the AP. The Join Request message and the Join Response message are encrypted by Datagram Transport Layer Security (DTLS).

5 is a flow diagram of a method for configuring the latest wireless environment between an AC and an AP in accordance with an embodiment.

Referring to FIG. 5, a method of configuring the latest wireless environment between an AC and an AP includes a step (S501) of generating a Discovery Request message in which the AP currently includes its own firmware version information, (S502) of transmitting a Discovery Request message to the AC that has received the Discovery Request message. The AC that received the Discovery Request message transmits the firmware version information included in the Discovery Request message and the firmware version managed by the AC The firmware update request message includes firmware update request information for requesting the AP to upgrade to the latest version firmware if the firmware version information differs from the result of the comparison, (S503, S504, S505) of generating a Discovery Response message and transmitting a Discovery Response message to the AP (S50 6). The procedures described below including embodiments of the present invention can be implemented in various forms.

First, the AP generates a Discovery Request message including its firmware version information (S501).

According to an aspect, in step S501 of generating a Discovery Request message, the AP transmits a search request including one or more of the number of failed firmware upgrades, the reason why the latest firmware upgrade has failed, and the current firmware version information Discovery Request message.

According to an exemplary embodiment of the present invention, in step S501 of generating a Discovery Request message, the AP stores the number of failed firmware upgrades in the message element field of the Discovery Request message, The reason for failure, and the firmware version information of the current firmware may be generated to generate a Discovery Request message. That is, the message element may further include a message element indicating firmware version information in a message element field of a discovery request message.

Table 1 shows a structure of firmware version information according to one embodiment.

typedef struct __cw_vendor_spec_firm_result__ {
int fail_cnt;
int last_reason;
char version [16];
} cw_vendor_spec_firm_result_t;

Here, " fail_cnt " indicates the number of firmware upgrade failure times. According to one embodiment, " fail_cnt " may represent the number of consecutive failed firmware upgrades.

&Quot; last_reason " indicates the reason why the latest firmware upgrade failed. According to one embodiment, the reason why the latest firmware upgrade has failed can be classified into code values according to the type thereof. For example, if there is no firmware file name in the Discovery Response message or there is no firmware information, if the firmware download fails, if a firmware file is downloaded but a Checksum error occurs in the downloaded firmware file, When the firmware upgrade is normally performed, or when an undefined error occurs, the corresponding case can be indicated as a code value.

&Quot; version " indicates firmware version information of the current AP. According to one embodiment, the firmware version information may be in the format " Major.Minor.Extra ", using two digits or alphabets, and using the ".&Quot;

Next, the AP transmits a Discovery Request message to the AC to be interworked with the AP (S502). According to one aspect, the information communication between the AP and the AC may be performed according to a control and provisioning of wireless access points (CAPWAP) protocol, which is a wireless access point setting rule.

Next, the AC that receives the discovery request message compares the firmware version information included in the discovery request message with the firmware version information managed by the AC (S503). The search response Discovery Response) message, and if the firmware version information is different, generates a Discovery Response message including firmware upgrade request information for requesting the AP to upgrade to the latest version firmware (S504 , S505). That is, if the firmware version information included in the discovery request message differs from the firmware version information managed by the AC, the AC generates a discovery response message including the firmware upgrade request information (S504) . However, if the firmware version information included in the Discovery Request message is identical to the firmware version information managed by the AC, the AC generates a Discovery Response message that does not include the firmware upgrade request information (S505) .

According to an aspect, in the step of generating a discovery response message (S503, S504, and S505), when the firmware version information is found to differ from the firmware version information, the AC requests the AP to upgrade to the latest version of the firmware It is necessary to include at least one of a required ID and a password depending on the method of downloading the firmware, the port number to download the firmware, the server address to download the firmware, the name of the firmware file, And generate a Discovery Response message based on the firmware upgrade request information.

According to one embodiment, when the firmware version information differs from the firmware version information comparison result in the step of generating the discovery response message (S503, S504, and S505), the AC transmits the message element of the discovery response message In order to request the AP to upgrade the firmware of the latest version to the AP in the field of Message Elements, a method of downloading firmware, a port number to download firmware, a server address to download firmware, a name of a firmware file, A discovery response message may be generated based on the firmware upgrade request information including at least one of ID and password required according to the version information and the method of downloading the firmware. That is, the message element indicating the firmware upgrade request information may further include a message element in the message element of the Discovery Response message.

Table 2 shows the structure of firmware upgrade request information according to one embodiment.

typedef struct __cw_vendor_spec_firm__ {
int flag;
int type;
int port;
char server_addr [64];
char file_name [512];
char version [16];
char id [32];
char passwd [32];
} cw_vendor_spec_firmware_t;

Here, "type" indicates the manner in which the AP will download the firmware. For example, if the type is '0', the AP downloads firmware in HyperText Transfer Protocol (HTTP) format. If the type is '1', the AP downloads firmware in Hypertext Transfer Protocol over Secure Socket Layer (HTTPS) If the type is '2', the AP downloads the firmware using the FTP (File Transfer Protocol) method. If the type is '3', the AP can indicate that the firmware is downloaded using the TFTP (Trivial File Transfer Protocol) method.

"Port" indicates the port number where the AP will download the firmware.

&Quot; server_addr " indicates a server address at which the AP downloads the firmware.

"File_name" indicates the name of the firmware file to be downloaded by the AP.

&Quot; version " indicates version information of the firmware to be downloaded by the AP. According to one embodiment, the version information of the firmware to be downloaded by the AP may use the format " Major.Minor.Extra ", use a two-digit number or alphabet, and use a ". &Quot;

The " id " indicates the required ID depending on how the AP downloads the firmware.

"Passwd" indicates the required password depending on how the AP will download the firmware.

Next, the AC transmits a Discovery Response message to the AP (S506). According to one aspect, the information communication between the AP and the AC may be performed according to a control and provisioning of wireless access points (CAPWAP) protocol, which is a wireless access point setting rule.

Next, according to one aspect, the AP may further include upgrading the firmware according to the firmware upgrade request information included in the discovery response message received from the AC.

According to one embodiment, the AP may include a method of downloading the firmware included in the discovery response message received from the AC, a port number to download the firmware, a server address to download the firmware, a name of the firmware file, Depending on the method of downloading information and firmware, firmware can be upgraded according to the firmware upgrade request information including at least one of ID and password required. For example, the AP can download a file corresponding to the name of the firmware file from the server address to download the firmware through the port number for downloading the firmware, according to the way of downloading the firmware. At this time, the AP can use the required ID and password according to the way of downloading the firmware. When the AP downloads the firmware file, the AP performs the upgrade operation to the firmware file where the current firmware is downloaded.

According to an aspect, in a method for configuring the latest wireless environment between an AC and an AP, information communication between the AP and the AC can be performed according to a control and provisioning of wireless access points (CAPWAP) protocol, which is a wireless access point setting rule.

CAPWAP is a wireless LAN standard announced by the Internet Engineering Task Force (IETF), and is a protocol for supporting an enterprise wireless LAN environment. In IEEE 802.11, the traditional wireless LAN environment consists of three components: Authentication Server (AS), Access Point (AP), and Mobile Station (MS). At this time, the AP is composed of a physical layer and a MAC layer (Medium Access Control Layer). The CAPWAP architecture separates the functions of the FAT-AP in the traditional wireless LAN environment into two layers, physical layer and MAC layer, and adds a new physical component called Wireless LAN Termination Point (WTP) and Access Controller (AC).

6 is a flow diagram of a method for configuring the latest wireless environment between an AC and an AP in accordance with another embodiment. Specifically, FIG. 6 is a flowchart illustrating another step (S501) in which the AP of FIG. 5 generates a Discovery Request message including the current firmware version information.

5 and 6, in step S501 of generating a Discovery Request message, the AP includes at least one of the number of failed firmware upgrades, the reason why the recent firmware upgrade has failed, and the current firmware version information A Discovery Request message may be generated (S601).

According to an aspect, a method of configuring the latest wireless environment between an AP and an AC may further include restricting a firmware upgrade attempt (S602, S603) if the number of firmware upgrade failure times is a predetermined value or more.

First, it is determined whether the number of failed firmware upgrade failures of the generated Discovery Request message is equal to or greater than a predetermined value (S602).

Next, if the number of failed firmware upgrade failures is greater than or equal to the predetermined value, the firmware upgrade attempt is inhibited (S603). According to one embodiment, if the number of firmware upgrade failure times is greater than a predetermined value, the AP may be controlled so as not to attempt a firmware upgrade any more. The predetermined value serving as a reference of the number of upgrade attempts may be defined as an arbitrary value depending on the network environment between the AP and the server storing the firmware program.

On the other hand, if it is determined that the number of failed firmware upgrade failures is not equal to or greater than the predetermined value, the next step for configuring the latest wireless environment between the AP and the AC is performed.

7 is a flow diagram of a method for configuring the latest wireless environment between an AC and an AP in accordance with another embodiment. A brief description will now be made of a method for configuring the latest wireless environment between an AC and an AP to avoid unnecessary repetition, and the matters not described in detail here can be applied equally to those described with reference to FIG. 1 to FIG.

Referring to FIG. 7, an AP (Access Point) 30 generates a Discovery Request message including firmware version information (S701). Next, the AP transmits a Discovery Request message to the AC (S702).

Next, the AC compares the firmware version information included in the discovery request message with the firmware version information managed by the AC (S703).

If the firmware version information is not the same as the comparison result (S704), the AC generates a discovery response message including the firmware upgrade request information (S705). Next, the AC transmits a discovery response message including the firmware upgrade request information to the AP (S706).

On the other hand, if the firmware version information is the same as the comparison result (S704), the AC generates a discovery response message that does not include the firmware upgrade request information (S707). Next, the AC transmits a discovery response message not including the firmware upgrade request information to the AP (S708).

8 is a flow diagram of a method for configuring the latest wireless environment between an AC and an AP in accordance with another embodiment. A brief description will now be made of a method for configuring the latest wireless environment between an AC and an AP to avoid unnecessary repetition, and the matters not described in detail here can be applied equally to those described with reference to FIG. 1 to FIG.

Referring to FIG. 8, the AC generates a discovery response message including firmware upgrade request information and transmits the discovery response message to the AP (S803, S804). Next, the AP upgrades the firmware according to the firmware upgrade request information included in the discovery response message received from the AC (S805).

9 is a flow diagram of a method for configuring the latest wireless environment between an AC and an AP in accordance with another embodiment. A brief description will now be made of a method for configuring the latest wireless environment between an AC and an AP to avoid unnecessary repetition, and the matters not described in detail here can be applied equally to those described with reference to FIG. 1 to FIG.

Referring to FIG. 9, the AP receives a Discovery Response message including firmware upgrade request information from the AC (S904), and upgrades the firmware according to the firmware upgrade request information. In this case, if the AP fails to upgrade the firmware (S905), the AP manages the number of failed firmware upgrades and the reason for the failed firmware upgrade.

Thereafter, the AP generates a Discovery Request message including firmware version information to connect with the AC (S906). In this case, the AP may generate a Discovery Request message including at least one of the number of failed firmware upgrades, the reason for the recent firmware upgrade failure, and the current firmware version information.

Next, the AP determines whether the number of failed firmware upgrade failures in the generated Discovery Request message is equal to or greater than a predetermined value (S907). If it is determined that the number of failed firmware upgrade failures is equal to or greater than the predetermined value, (S908). According to one embodiment, if the number of firmware upgrade failure times is greater than a predetermined value, the AP may be controlled so as not to attempt a firmware upgrade any more. The predetermined value serving as a reference of the number of upgrade attempts may be defined as an arbitrary value depending on the network environment between the AP and the server storing the firmware program.

On the other hand, if it is determined that the number of failed firmware upgrade failures is not equal to or greater than the predetermined value, the next step for configuring the latest wireless environment between the AP and the AC is performed.

10 is a flowchart of a method for configuring the latest wireless environment between an AC and an AP in accordance with another embodiment.

Referring to FIG. 10, a method of configuring the latest wireless environment between an AC and an AP according to an aspect includes a step (S1001) of generating an association request message including an own system information at step S1001, AC to the AC in step S1002. In step S1002, the AC that has received the join request message requests a connection to the corresponding AP according to the system information included in the join request message (S1003, S1004) of determining an allocation policy for an IP to be allocated to terminal devices and generating a Join Response message including a determined DHCP IP allocation policy, And transmitting the message (S1005).

First, the AP generates a Join Request message including its own system information (S1001).

According to one aspect, in the step of generating a join request message (S1001), at least one of the operation mode information, the IP address, the net mask information, the gateway information, the first DNS information, and the second DNS information of the AP A Join Request message may be generated based on the system information including the message " Join Request ".

According to an exemplary embodiment, in step S1001 of generating a Join Request message, the AP adds the operation mode information of the AP, the IP address, the Net address, and the IP address of the AP in a message element field of a Join Request message. A Join Request message may be generated based on system information including at least one of Mask information, Gateway information, first DNS information, and second DNS information. That is, the message element may further include a message element indicating system information in a message element field of a join request message.

Table 3 shows the structure of system information according to one embodiment.

typedef struct __cw_vendor_spec_ipv4__ {
int opmode;
unsigned int ipaddr;
unsigned int netmask;
unsigned int gateway;
unsigned int dns1;
unsigned int dns2;
} cw_vendor_spec_network_v4_t;

Here, " opmode " indicates the operation mode information of the AP. For example, if opmode is '0', it is a static operation mode, and if opmode is '1', it is a DHCP operation mode.

"Ipaddr" represents the IP address of the AP.

"Netmask" indicates the AP's netmask information.

"Gateway" indicates the gateway information of the AP.

&Quot; dns1 " indicates the first DNS information of the AP.

&Quot; dns2 " indicates the second DNS information of the AP.

Next, the AP transmits a join request message to the AC (S1002). According to one aspect, the information communication between the AP and the AC may be performed according to a control and provisioning of wireless access points (CAPWAP) protocol, which is a wireless access point setting rule.

Next, according to the system information included in the Join Request message, the AC that has received the Join Request message determines the allocation policy for the IP to be allocated to the terminals requesting connection to the AP (S1003), and generates a Join Response message including the determined DHCP IP allocation policy (S1004).

According to an aspect, in the step of generating a join response message (S1004), when the operation mode information of the AP indicates that the DHCP server of the AP is operating, It is possible to determine a policy for allocating IPs so that allocated IPs do not collide, and generate a Join Response message including the determined DHCP IP allocation policies.

Next, the AC transmits a Join Response message to the AP (S1005). According to one aspect, the information communication between the AP and the AC may be performed according to a control and provisioning of wireless access points (CAPWAP) protocol, which is a wireless access point setting rule.

In addition, a method of configuring the latest wireless environment between such an AC and an AP may be stored in a computer-readable recording medium on which a program for executing by a computer is recorded. At this time, the computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. Program instructions to be recorded on the medium may be those specially designed and constructed for the proposed invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. The medium may be a transmission medium such as an optical or metal line, a wave guide, or the like, including a carrier wave for transmitting a signal designating a program command, a data structure, or the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa. In addition, the computer-readable recording medium may be distributed to network-connected computer devices so that computer-readable codes can be stored and executed in a distributed manner.

The above description is merely illustrative, and various modifications, alterations, and substitutions are possible without departing from the essential characteristics of those skilled in the art. Therefore, the disclosed embodiments and the accompanying drawings are intended to illustrate and not limit the technical idea of the proposed invention, and the scope of the technical idea is not limited by these embodiments and accompanying drawings. The scope of protection of the proposed invention should be construed in accordance with the following claims and all technical ideas within the scope of equivalents thereof should be construed as being included in the scope of the scope of the invention claimed.

10: Management Server
20: AC (Access Controller)
30: AP (Access Point)
40: Terminal device

Claims (9)

In the latest wireless environment configuration method between an access controller (AC) and an access point (AP)
The AP generating a Discovery Request message including current firmware version information;
The AP sending a Discovery Request message to an AC to be interworked with the AP;
The AC that received the Discovery Request message compares the firmware version information included in the Discovery Request message with the firmware version information managed by the AC and transmits a Discovery Response message according to the result Generating a Discovery Response message including firmware upgrade request information for requesting the AP to upgrade to the latest version firmware when the firmware version information differs from the firmware update information; And
The AC sending a Discovery Response message to the AP;
The method comprising the steps of:
The method according to claim 1,
Wherein the information communication between the AC and the AP is performed in accordance with a control and provisioning of wireless access points (CAPWAP) protocol, which is a wireless access point setting rule.
The method according to claim 1,
In the step of generating the Discovery Request message, the AP generates a Discovery Request message including at least one of the number of failed firmware upgrades, the reason for the recent firmware upgrade failure, and the current firmware version information How to configure the latest wireless environment between AC and AP.
The method of claim 3,
And inhibiting the firmware upgrade attempt if the number of failed firmware upgrade failures is greater than or equal to a predetermined value.
The method according to claim 1,
In the step of generating the discovery response message, when the firmware version information differs from the firmware version information comparison result, in order to request the AC to upgrade the firmware to the latest version of the firmware, Based on the firmware upgrade request information including at least one of a required ID and a password according to a firmware download method, a port number to download the firmware, a server address to download the firmware, a name of the firmware file, A method of configuring the latest wireless environment between an AC and an AP that generates a Discovery Response message.
The method according to claim 1,
Further comprising upgrading the firmware according to firmware upgrade request information included in a discovery response message received from the AP by the AP.
The method according to claim 1,
The AP generating a Join Request message including its current system information;
The AP sending a Join Request message to the AC;
According to the system information included in the join request message, the AC that has received the Join Request message determines an allocation policy for the IP to be allocated to the terminals requesting connection to the AP, Generating a Join Response message including an IP allocation policy; And
The AC sends a Join Response message to the AP
The method further comprising the steps of:
8. The method of claim 7,
In the step of generating the join request message, the AP transmits system information including at least one of the operation mode information of the AP, the IP address, the net mask information, the gateway information, the first DNS information, and the second DNS information A method for configuring the latest wireless environment between an AC and an AP that generates a Join Request message based on the message.
9. The method of claim 8,
In the step of generating the Join Response message, when the operation mode information of the AP indicates that the DHCP server of the AP is operating, the IP address assigned to the terminal devices requesting connection to the AP through the DHCP server is A method for configuring a wireless environment between an AC and an AP, the method comprising: determining a policy for assigning an IP to avoid collision; and generating a Join Response message including the determined DHCP IP assignment policy.
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