KR20020013144A - Broadband wireless access network providing a mobility and method for providing a wireless internet service thereby - Google Patents

Abstract

PURPOSE: A broadband wireless network providing mobility and a method for providing a wireless Internet service according to the same are provided to initialize a mobile communication terminal of a subscriber through interface between managing servers of the broadband wireless network in case that the subscriber moves the mobile communication terminal to a local communication area managed by a different managing server or an equal managing server, thereby providing a normal wireless Internet service. CONSTITUTION: The first and second BTSs(11,12) relay wireless communication within the first and second local communication areas using equal communication frequency. The first managing server(10) manages and provides various information necessary for providing a wireless Internet service within the first and second local communication areas. The first location server(30) manages and provides location information related to communication terminals(110) located within the first and second local communication areas. The first router(1) is connected with the first and second BTSs(11,12), the first managing server(10), the first location server(30) and the Internet(100) for routing transmitting data and information. The third and fourth BTSs(21,22) relay wireless communication within the third and fourth local communication areas using different communication frequency. The second managing server(20) manages and provides various information necessary for providing a wireless Internet service within the third and fourth local communication areas. The second location server(40) manages and provides location information related to communication terminals(120,210,220) located within the third and fourth local communication areas. The second router(2) is connected with the third and fourth BTSs(21,22), the second managing server(20), the second location server(40) and the Internet(100) for routing transmitting data and information.

Description

Broadband wireless network providing mobility and a method for providing a wireless internet service according to the present invention {Broadband wireless access network providing a mobility and method for providing a wireless internet service

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadband wireless network providing mobility and a method for providing a wireless internet service. More specifically, the present invention relates to a modem provided by a subscriber to a broadband wireless network (BWAN). The present invention relates to a broadband wireless network that provides mobility for providing the same wireless Internet service even when a modem and a communication terminal are moved to another local communication area.

A general broadband wireless network (BWAN) includes a base station (BTS) for relaying wireless communication in a local communication area in which customer premise equipment modems (CMs) connected and connected to a wireless antenna are located; A management server that manages and provides various types of information necessary for providing a wireless Internet service, such as an IP (Internet Protocol) address; The router is connected to the base station, the management server, and the Internet, and includes a higher-level router that routes transmission data and information through a corresponding communication path. When described in detail as follows.

First, FIG. 1 shows a configuration of an embodiment of a general broadband wireless network. The broadband wireless network includes wireless communication in the first and second local communication areas A1 and A2 using the same communication frequency. First and second base stations 11 and 12 respectively relaying; A first management server (10) for managing and providing various types of information necessary for providing wireless Internet services in the first and second local communication areas (A1.A2); A first router (1) connected to the first and second base stations (11, 12), the first management server (10), and the Internet (100) to route transmission data and information; And third and fourth base stations 21 and 22 for relaying wireless communication in the third and fourth local communication areas A3 and A4 using different communication frequencies, respectively; A second management server (20) for managing and providing various types of information necessary for providing wireless Internet services in the third and fourth local communication areas (A3.A4); A second router 2 connected to the third and fourth base stations 21 and 22, the second management server 20, and the Internet 100 to route transmission data and information may be included. .

Meanwhile, the first management server 10 and the second management server 20 are DHCP, which is a dynamic host configuration protocol server that performs functions such as allocating an IP address or providing configuration data. (Dynamic Host Configuration Protocol) server, a Trivial File Transfer Protocol (TFTP) server, which is a general file transfer protocol server that performs a function such as downloading file information, and a time server that provides time information. The DHCP server, TFTP server, and time server may be logically installed in the management servers 10 and 20, or may be separately installed.

Accordingly, a subscriber located in a specific local communication area, for example, the second local communication area A2 shown in FIG. 1, uses a communication terminal (CM2) 120 connected by wire to a wireless antenna. It is possible to receive a wireless Internet service in a broadband wireless network connected to the Internet 100 by wireless connection. The first management server 10 includes a first and a second local communication area A1 managed by itself. Manage and provide various kinds of information necessary to provide wireless Internet service in .A2).

On the other hand, the second base station 12 stores an IP address allocated from the first management server 10, and transmits data and information received through the first router 1 to the second local communication. Wireless relay to the communication terminal (CM2) (120) located in the area, or performs a relay operation for transmitting data and information wirelessly received from the communication terminal (CM2) (120) to the first router (1) In order to normally receive the wireless Internet service in the above state, the communication terminal (CM2) 120 should perform an initialization process with the first management server 10 managing the second local communication area as follows.

First, the communication terminal (CM2) 120 scans the reception band to follow the downstream synchronization, and grasp the contents of the downstream (Down Steam) by the following synchronization, and then from the upstream channel descriptor (Descriptor) A parameter for upstream is obtained and timing for power and time slot for upstream transmission is adjusted through ranging. Attempt connection connection with the first management server 10, and after connection, the IP address to be used by the communication terminal itself, the address of the first management server and the address of the first router, and its own media access control (MAC) Control A configuration file name specified according to an address is received, and information on a current time is received.

When this process is completed, the communication terminal CM2 provides the received configuration file name to the TFTP server of the first management server 10, and includes a configuration file including an IP address, communication frequency, quality service information, and the like. You will be downloaded. Then, by registering itself with the second base station 12 by using the values specified in the configuration file, it is possible to transmit and receive wireless data.

However, in the general broadband communication network, since the mobility of the communication terminal is not taken into consideration, when the subscriber moves and installs the communication terminal CM that he / she has in a different local communication area, as described above, the movement is performed during the initialization process. Access to the management server of the local communication area, and receive the address of the network component of the area and the configuration file name required by the communication terminal, but the media access control (MAC) address transmitted by the communication terminal to find the management server is Since it is not the subscriber's media access control address managed by the management server of the mobile area, the management server of the mobile area becomes unresponsive and thus cannot perform the initialization process.

In addition, when the mobile terminal is installed within the jurisdiction of the same management server, for example, a mobile terminal fixedly installed in the first local communication area A1 shown in FIG. 1 is moved to the second local communication area A2 and installed. 2 When the base station 12 operates as a router, the first management server does not detect the movement of the communication terminal and thus assigns an IP address of the first local communication area A1. As a result, since the IP address system of the mobile communication terminal is different from the IP address system of the second local area A1, the initialization process cannot be performed.

In addition, when the mobile terminal is installed in the jurisdiction of the same management server, for example, when the mobile terminal fixedly installed in the first local communication area (A1) shown in Figure 1 moved to the second local communication area (A2). Also, since the media access control address in the message (DHCP discover) sent to find the first management server 10, especially the DHCP server, is not the IP address of an intermediate gateway (not shown), the gateway is itself. Since the IP address of the terminal cannot be delivered to the communication terminal, the mobile communication terminal can not be connected to the DHCP server and thus cannot perform the initialization process.

Accordingly, the present invention has been made to solve the above problems, the subscriber to the broadband wireless network (BWAN), the local communication area that is managed by different management servers the communication terminal (CM) that they have provided Or a broadband wireless network providing mobility for ensuring normal wireless Internet service even when moving to another local communication area managed by the same management server. There is a purpose.

1 illustrates a configuration of a general broadband wireless network (BWAN),

2 illustrates a configuration of a broadband wireless network (BWAN) providing mobility according to the present invention,

3 is a flowchart illustrating a method for providing a wireless Internet service in a broadband wireless network (BWAN) providing mobility according to the present invention;

4 illustrates a DHCP message format sent through a base station in a broadband wireless network (BWAN) providing mobility according to the present invention.

※ Explanation of code for main part of drawing

1,2: Router 10,20: Management Server

11,12,21,22: BTS 30,40: Location Server

100: Internet 110,120,210,220: Communication terminal (CM)

Broadband wireless network providing mobility according to the present invention for achieving the above object, in a broadband wireless network for providing wireless Internet services with communication terminals located in a plurality of local communication area, located within the local communication area A plurality of base stations for relaying wireless communication with communication terminals; A location server for managing location information of the communication terminals by area; And based on the unique address of the communication terminal requesting connection for initialization, if it is not a communication terminal in the local communication area managed by the user, the unique address of the communication terminal to another server through an interface with the location server. Provide a communication parameter configuration file for the communication terminal from a management server managing the local communication area to which the communication terminal belongs, generate a temporary configuration file based on the obtained configuration file, and connect the file name to the connection name. After providing to the requested communication terminal, characterized in that it is configured to include one or more management server for downloading the contents of the temporarily generated configuration file, at the request of the communication terminal,

In addition, the wireless Internet service providing method in a broadband wireless network providing mobility according to the present invention, based on the unique address of the communication terminal requesting connection for initialization, to determine whether it is a communication terminal in the local communication area managed by itself Stage 1; A second step of providing a unique address of the communication terminal to another management server if it is not a communication terminal in the local communication area managed by the determination result; Obtaining a communication parameter configuration file for the communication terminal from a management server managing a local communication area to which the communication terminal belongs; And 4 generating a temporary configuration file based on the obtained configuration file, providing the file name to the communication terminal requesting the connection, and downloading the contents of the temporary generated configuration file according to a request of the communication terminal. Characterized in that comprises a step,

In addition, the wireless Internet service providing method in a broadband wireless network providing mobility according to the present invention, based on the unique address of the communication terminal requesting connection for initialization, to determine whether it is a communication terminal in the local communication area managed by itself Stage 1; As a result of the determination, in the case of the communication terminal in the local communication area managed by the self, based on the 'IP address' of the DHCP message transmitted by the communication terminal, it is determined whether the communication terminal belongs to another local communication area managed by the communication terminal. Determining two steps; A third step of updating a communication parameter configuration file for the communication terminal appropriately for the affix address if the communication terminal belonged to another local communication area managed by the determination result; And downloading four contents of the updated configuration file.

First, a broadband wireless network (BWAN) for providing mobility according to the present invention includes a base station (BTS) for relaying wireless communication in a local communication area where communication terminals (CMs) of subscribers connected and connected to a wireless antenna are located; A management server for managing and providing various types of information necessary for providing a wireless Internet service, such as an IP address; Connected to the base station, the management server, and the Internet, the communication terminal (CM) located in the local communication area, in addition to a high-level router that routes transmission data and information through the corresponding communication path. The location server for managing and providing location information for the location (Location Server) is additionally configured, the location server further configured as described above, may be included in the management server, or may be installed separately, the present invention An embodiment of a broadband wireless network for providing mobility and a method for providing a wireless Internet service according to the present invention will be described in detail with reference to the accompanying drawings.

Fig. 2 shows a configuration of an embodiment of a broadband wireless network providing mobility according to the present invention, wherein the first and second local communication areas A1 and A2 use the same communication frequency for the broadband wireless network. First and second base stations (11, 12) for relaying wireless communication in the network respectively; A first management server (10) for managing and providing various types of information necessary for providing wireless Internet services in the first and second local communication areas (A1.A2); A first location server (30) for managing and providing location information for communication terminals (CMs) located in the first and second local communication areas (A1, A2); A first router 1 connected to the first and second base stations 11 and 12, the first management server 10 and the first location server 30, and the Internet 100 to route transmission data and information; ); And third and fourth base stations 21 and 22 for relaying wireless communication in the third and fourth local communication areas A3 and A4 using different communication frequencies, respectively; A second management server (20) for managing and providing various types of information necessary for providing wireless Internet services in the third and fourth local communication areas (A3.A4); A second location server 40 for managing and providing location information on communication terminals CM located in the third and fourth local communication areas A3 and A4; A second router connected to the third and fourth base stations 21 and 22, the second management server 20 and the second location server 40, and the Internet 100 to route transmission data and information; 2) may be included, and as described above with reference to FIG. 1, the first management server 10 and the second management server 20 allocate an IP address or provide configuration data. DHCP server for performing a function such as, and the like, a TFTP server for performing a function such as transmitting general file information or downloading a configuration file, and a time server for providing time information, the DHCP server, The TFTP server and time server may be logically divided or separately installed in the management servers 10 and 20.

Accordingly, a subscriber located in a specific local communication area may use a communication terminal (CM) connected to a wireless antenna via a modem or the like in a broadband wireless network wirelessly connected to the Internet 100. When the subscriber is to move and install the wireless antenna and the communication terminal owned by the other local communication area, for example, as shown in FIG. And the subscriber station's communication terminal (CM2) 120 fixedly installed in the second local communication area A2 to a third local communication area A3 managed by different management servers, that is, the second management server 20. In the case of mobile installation, in the second location server 40 which manages and provides location information on communication terminals located in the third local communication area A3, the mobile terminal CM2 120 is newly installed. About location Information, and the receive and store managed by the interface with the first location server 30, thereby the terminal (CM2) (120) installed newly moved to perform the following initialization steps.

That is, as shown in Fig. 3, in the communication terminal CM2 120 installed and moved to the third local communication area A3, a unique Media Access Control (MAC) address assigned to itself, A message (DHCP discover) for searching for a DHCP server is transmitted through the third base station (BTS3) 21 (S10).

On the other hand, in the DHCP server included in the second management server 210 that receives it, after checking the media access control (MAC) address, it is determined that it is not a media access control (MAC) address for the subscriber that it manages Then, it generates a message (Notify CM2) for notifying this to be transmitted to the second location server (40) (S11).

Accordingly, the second location server 40 generates a message (CM2 Verify Req.) Inquiring whether to subscribe to the media access control (MAC) address of the communication terminal (CM2) 120, and generates another location. To be sent to the server (S12). In the first location server 30 that receives this, it is confirmed that the media access control (MAC) address of the communication terminal (CM2) 120 is the media access control (MAC) address of the subscriber managed by itself. Create a message (CM2 Config. File Name Req.) Requesting a configuration file name for the communication terminal (CM2) (120), DHCP server of the first management server 10 that is shared with itself and area management It is transmitted to (S13).

Meanwhile, in the DHCP server of the first management server 10, a message (CM2 Config. FileName Resp.) Including a configuration file name for the communication terminal (CM2) 120 is generated and the first location server 30 is generated. (S14), the first location server 30 receives the configuration information again including the quality of service (QoS) for the communication terminal (CM2) (120) A request message (CM2 Config. Info. Req.) Is generated and transmitted to the TFTP server of the first management server 10 (S15).

Accordingly, in the TFTP server of the first management server 10, a configuration information message including quality of service (QoS) information for the communication terminal (CM2) 120 (CM2 Config. Info. Resp. ) Is generated and transmitted to the first location server 30 (S15), the first location server 30 that receives it, the configuration file name and quality of service for the received communication terminal (CM2) (120) A configuration information response message (CM2 Verify Resp.) Including the (QoS) information is generated and transmitted to the second location server 40 (S17).

On the other hand, the second location server 40 receives this, the second management server generates a message (Create New Config. File Req.) Requesting to create a new configuration file for the communication terminal (CM2) (120) (20), the TFTP server transmits the configuration file corresponding to the configuration file, i.e., the IP address, the communication frequency, the quality service information, and the like, based on the received response message. After creating the local area appropriately, a response message (Create New Config. File. Resp.) Indicating this is transmitted to the second location server 40 (S19).

Subsequently, the second location server 40 sends a message (Visitor CM2 Create Req.) Requesting to additionally register a media access control (MAC) address and a configuration file of the communication terminal (CM2) 120. The server is transmitted to the DHCP server included in the management server 20 (S20), and after performing the additional registration process corresponding to the DCHP server, a response message (Visitor CM2 Create Resp.) Indicating this to the second location server In step S21, while generating a response message (DHCP Offer) in response to a message received from the communication terminal (CM) 120, that is, a message (DHCP discover) to find a DHCP server, It is transmitted to the communication terminal (CM) (120) (S22).

Accordingly, the communication terminal (CM2) (120) generates a message (DHCP Req.) Requesting the IP address and configuration file name for each server that manages the third local communication area (A3) it is installed and moved In order to transmit the DHCP server included in the second management server 20 (S23), the DHCP server receiving the generated response message (DHCP Resp.) Generates a corresponding communication terminal (CM) 120. In this case, the required configuration file is downloaded from the TFTP server included in the second management server 20 to the communication terminal (CM2) 120 (Down Load).

On the other hand, in the communication terminal (CM2) 120 has downloaded the configuration file as described above, by using the parameters included in the configuration file, the third base station (BTS3) (for relaying wireless communication in the third local communication region ( 21, a registration request message (Registration Req.) For registering itself is transmitted (S26), and the third base station (BTS3) 21 transmits a corresponding registration response message (Registration Req.). In addition to transmitting to the terminal (CM2) (120), and allocates radio resources to the communication terminal (CM2) (120) and manages it (S27).

Therefore, even if a subscriber subscribed to the broadband wireless network moves and installs his own communication terminal to a local communication area managed by another management server, the radio resources are allocated through the initialization process for the newly installed communication terminal. And since the management is made, it is possible to provide a normal wireless Internet service.

On the other hand, when the subscriber moves and installs its own wireless antenna and communication terminal to another local communication area managed by the same management server, for example, as shown in FIG. 3 Moving to the local communication area A3 When the installed communication terminal (CM2) 120 is moved to the fourth local communication area A4 managed by the same second management server 20 again, moving again. In the installed communication terminal (CM2) (120), as described above with reference to Figure 3, it performs an initialization process.

Accordingly, in the fourth base station (BTS4) 22, a unique media access control (MAC) address assigned to the communication terminal (CM2) 120 moved to and installed in the fourth local communication area A4, and a DHCP server are stored. A routing operation is performed to transmit a message (DHCP discover) to find to a DHCP server configured in the second management server 20. In the fourth base station (BTS4) 22, a communication terminal (CM2) ( The IP address for the interface with the 120 is transmitted to the DHCP server included in the second management server 20.

That is, as shown in FIG. 4, the IP address for the interface with the communication terminal (CM2) 120 is recorded on the 'Router IP Address' field included in the DHCP message (DHCP discover). In the DHCP server configured to receive the second management server 20 to receive it, the IP address recorded and transmitted on the 'router IP address' field of the DHCP message is checked and analyzed. It is determined as a communication terminal located in the third and fourth local communication areas.

Accordingly, a response message (DHCP Offer) is generated in response to a message received from the communication terminal (CM) 120, that is, a message for searching for a DHCP server (DHCP discover) without an interface operation with the second location server 40. In order to perform a series of initialization processes to be transmitted to the communication terminal (CM) 120, the fourth base station (BTS4) (22), the radio resources to the communication terminal (CM2) (120) Since the subscribers joining the broadband wireless network move and install their own communication terminal to another local communication area managed by the same management server, Since radio resources are allocated and managed through an initialization process, normal wireless Internet service can be provided.

As mentioned above, preferred embodiments of the present invention are disclosed for the purpose of illustration, and those skilled in the art can improve and change various other embodiments within the spirit and technical scope of the present invention disclosed in the appended claims below. , Replacement or addition would be possible.

According to the present invention, a broadband wireless network for providing mobility and a method for providing a wireless Internet service according to the present invention include a subscriber to a broadband wireless network (BWAN) having a different communication terminal (CM). In the case of mobile installation to the local communication area managed by the management server, through the interface between the management servers provided in the broadband wireless network, by initializing the communication terminal of the newly installed subscriber, it is possible to provide normal wireless Internet service In addition, even if a subscriber joining a broadband wireless network (BWAN) moves his or her own communication terminal to another local communication area managed by the same management server, the IP for the interface with the mobile communication terminal is installed. In addition to transmitting the address from the base station to the management server, By checking and analyzing this, it is possible to initialize the communication terminal, which is a very useful invention that can provide a normal wireless Internet service.

Claims (9)

In a broadband wireless network providing wireless Internet service with communication terminals located in a number of local communication areas, A plurality of base stations for relaying wireless communication with communication terminals located within a local communication area; A location server for managing location information of the communication terminals by area; And Based on the unique address of the communication terminal requesting connection for initialization, if the communication terminal is not in the local communication area managed by the user, the unique address of the communication terminal is provided to another server through the interface with the location server. Obtains a communication parameter configuration file for the communication terminal from a management server managing the local communication area to which the communication terminal belongs, generates a temporary configuration file based on the obtained configuration file, and requests the connection name for the file name. After providing to the communication terminal, at the request of the communication terminal, the broadband wireless network comprising a mobile terminal comprising at least one management server for downloading the contents of the temporarily generated configuration file. The method of claim 1, The location server is configured to be included in the management server integrally or separately installed separately from the management server, and stores the location information of the communication terminals located in a plurality of local communication area managed by a management server set in advance A broadband wireless network that provides mobility characterized by what it provides. The method of claim 1, The management server, A dynamic host communication protocol (DHCP) server that performs a function of assigning an IP address of a communication terminal or providing configuration data; A general file transfer protocol (TFTP) server performing a function of downloading file informations; And Broadband wireless network providing mobility characterized in that it comprises a time server for providing time information. The method of claim 1, The generation of the temporary configuration file includes a configuration file name provided from a dynamic host communication protocol server included in a management server managing a local communication area to which the communication terminal belongs, and a general file transfer protocol server included in the management server. Broadband wireless network providing mobility, characterized in that generated by a general file transfer protocol server included in the management server for managing the current local communication area to which the communication terminal belongs to receive the configuration information. Determining whether the terminal is a communication terminal in the local communication area managed by the terminal based on the unique address of the communication terminal requesting the connection for initialization; A second step of providing a unique address of the communication terminal to another management server if it is not a communication terminal in the local communication area managed by the determination result; Obtaining a communication parameter configuration file for the communication terminal from a management server managing a local communication area to which the communication terminal belongs; And Generating a temporary configuration file based on the obtained configuration file, providing the file name to the communication terminal requesting the connection, and then downloading the contents of the temporary generated configuration file according to a request of the communication terminal; Wireless Internet service providing method in a broadband wireless network providing a mobility comprising a. The method of claim 5, The unique address is a media access control (MAC) address uniquely assigned to the communication terminal, the wireless Internet service providing method in a broadband wireless network providing mobility. The method of claim 5, In the second step, the mobile station provides the unique address of the communication terminal to another management server through an interface with a location server where the location information of the communication terminal is stored and managed. Method of providing wireless Internet service in a network. Determining whether the terminal is a communication terminal in the local communication area managed by the terminal based on the unique address of the communication terminal requesting the connection for initialization; In the determination result, in the case of the communication terminal in the local communication area managed by the self, based on the IP address of the communication terminal, determining whether the communication terminal belonged to another local communication area managed by the user; A third step of updating a communication parameter configuration file for the communication terminal appropriately for the affix address if the communication terminal belonged to another local communication area managed by the determination result; And 4. The method of claim 1, further comprising downloading the contents of the updated configuration file. 4. The method of claim 8, The IP address of the communication terminal is recorded and transmitted on a router IP address field of a message transmitted through a base station relaying wireless communication with the communication terminal. How to Provide.