KR100635504B1 - Method for assigning location information of base station in a wibro network - Google Patents

Abstract

A location information allocation method in a WiBro(Wireless Broadband) network is provided to be capable of assigning location information having a unique value, in consideration of topology of the network instead of randomly assigning the location information, so that even information about an upper device can be included in the predetermined location information itself. Location information of a PSS(Portable Subscriber Station) is configured by including an ID code of a sector to which the corresponding PSS belongs, an ID code of an RAS(Radio Access Station) taking charge of the sector to which the PSS belongs, and an ID code of an ACR(Access Control Router) taking charge of the corresponding RAS.

Description

How to assign location information in WiBro network {Method for assigning location information of base station in a WiBro Network}

1 is a schematic configuration diagram of a WiBro network to which a location information allocation method according to the present invention is applied;

FIG. 2 is a schematic diagram for explaining sector allocation in the WiBro network shown in FIG. 1;

3 is a diagram illustrating a format of, for example, a base station identification code as position information in a method for allocating position information in a WiBro network according to the present invention;

FIG. 4 is a view for explaining a procedure for performing location registration of a PSS using a base station identification code assigned by a location information allocation method in a WiBro network according to the present invention as location information. to be.

<Description of Symbols for Main Parts of Drawings>

ACR: Access Control Router

PSS: Portable Subscriber Station

RAS: Radio Access Station

LMS: Location Management Server

The present invention relates to a method for allocating position information in a WiBro network. The present invention relates not to randomly allocating position information having a unique value in a WiBro network, but to assigning the position information itself by considering the topology of the network. The present invention relates to a method for allocating location information in a WiBro network to include information of a higher level device.

Currently, the global wireless Internet market is exploding and Korea is also providing high-speed wireless data services such as WLAN, CDMA 2000, 1x EV-DO, and WCDMA. As of the end of 2003, the sales of wireless internet accounted for 14% of the total sales of domestic mobile phones. However, wireless internet services using mobile phones are limited in speed due to low speed and relatively high usage rates. In this case, the speed is relatively high, but mobility is not guaranteed, and the radius of use is narrow, which also shows a limit to the activation of distribution. Therefore, there is a need for high-speed, relatively inexpensive wireless Internet service.

As a result, a new service called WiBro (Wireless-Broadband) has been proposed. This WiBro service will provide mobility [Handover] service in wide coverage (cell radius of about 1Km) and on the move (60Km / h) and provides a transmission rate of about 1Mbps per subscriber. . WiBro service is a service that enables data communication through internet connection like wireless LAN, and long distance communication like mobile phone, and can be called 'mobile internet'. The frequency band of WiBro service is allocated at 2.3Ghz, and the service bandwidth (ie internet speed) will be ADSL level communication of about 1Mbps or more.

The WiBro service aims to start commercial service in Korea in about 2006. The number of base stations (approximately 1.2-1.5 times compared to current CDMA networks) or mobile speeds (approximately 60 km) is slightly lower than the EV-DO services available on current CDMA mobile phones, but with cost advantages. will be.

The WiBro network includes a portable subscriber station (PSS), a radio access station (RAS), an access control router (ACR), and a location management server. (LMS).

The portable subscriber station (PSS) is a subscriber portable terminal such as a laptop, a mobile phone, and a personal digital assistant (PDA) equipped with a modem for data communication connection in a WiBro network. The service access function, the IP mobility function, the multicast service reception function, and the other network interworking function may be provided.

The radio access device (RAS) is a network termination device for the portable subscriber station (PSS) to access the network, and the wireless wireless access function, handover support function, radio resource management and control function of the portable subscriber station (PSS) And a downlink multicast function.

The access control router (ACR) is a device that is linked to and manages a plurality of radio access devices (RAS), including IP routing and mobility management functions, authentication and security functions of the portable subscriber station (PSS), IP multicast function, And a billing function, a handover control function between the radio access devices (RAS), a resource management and control function, and the like.

The location management server (LMS) is located above the access control router (ACR), service and information management of the portable subscriber station (PSS), location information management of the portable subscriber station (PSS), portable subscriber station (PSS) subscriber It may be provided with a termination and pause function.

The radio access device (RAS) may divide, for example, three sectors or six sectors in its jurisdiction, which may transmit / receive a transmit / receive antenna capable of transmitting / receiving at 120 degree or 60 degree units. Each sector may be assigned a different frequency band. As an example of such a sector division, FIG. 2 shows an example of three frequency bands and three sectors. Here, each sector is assigned a unique base station identification (BSID) throughout the network. That is, this BSID is a unique value assigned to each sector of the radio access device (RAS) and is a unique value in the WiBro network, which becomes the location information of each PSS.

In order to designate a certain sector in the WiBro network, BSIDs are assigned random values without any meaning. To determine the type of handover during call processing, the BSID and all BSIDs must be compared to know the positional relationship. RAS, access control router (ACR), and location management server (LMS) require not only a lot of operations, but also a complicated signal transmission and reception procedure for resolving the corresponding BSID, and a large number of access control routers (ACR) itself. There is a need to manage information relationships.

Therefore, in order to identify the BSID to be used as the location information of the portable subscriber station (PSS), the operation and the mutual signal transmission and reception procedures in the radio access device (RAS), the access control router (ACR), and the location management server (LMS) are greatly improved. There is a need for development of methods that can be reduced.

Accordingly, the present invention has been devised to meet the above-mentioned requirements of the prior art, and does not randomly allocate location information having a unique value in a WiBro network, but assigns the location information itself by considering the topology of the network. The purpose of the present invention is to provide a location information allocation method in a WiBro network that can include location information of a higher level device so that location information can be systematically managed and can be efficiently used in a call processing process.

In order to achieve the above object, the method for allocating location information in a WiBro network according to the present invention comprises: a portable subscriber station (PSS) for data communication connection, and a data communication area divided into predetermined sectors and located in each sector; In a WiBro network including a radio access device (RAS) for performing data communication with the portable subscriber station (PSS) and an access control router (ACR) linked to and managing the plurality of radio access devices (RAS), Location information of the portable subscriber station, the identification code of a sector to which the portable subscriber station belongs; An identification code of a radio access device that manages a sector to which the portable subscriber station belongs; And an identification code of an access control router that manages the wireless access device.

Hereinafter, a method of allocating location information in a WiBro network according to an exemplary embodiment of the present invention will be described in detail.

FIG. 1 is a schematic configuration diagram of a WiBro network to which a location information allocation method according to an exemplary embodiment of the present invention is applied, and FIG. 2 is a schematic configuration diagram for describing a sector allocated in the WiBro network shown in FIG. 1. .

As shown in the figures, the WiBro network includes a portable subscriber station (PSS), a radio access device (RAS), an access control router (ACR), and a location management server (LMS). The description of the components and the description of the sector have been described in the above-described prior art section, and thus description thereof is omitted here.

3 is a diagram illustrating a format of, for example, a base station identification code (BSID) as location information in the location information allocation method in a WiBro network according to the present invention.

As shown in the figure, as the location information in the WiBro network, the BSID is an identification code (ACR ID) of an access control router (ACR), an identification code (RAS ID) and a sector identification code (Sector) of a radio access device (RAS). ID). Here, each identification code (ACR ID, RAS ID, Sector ID) may be composed of two bytes, for example. As shown in the figure, each identification code field is composed of the most significant bit in order of the access control router identification code (ACR ID), the radio access device identification code (RAS ID), and the sector identification code (Sector ID). The order may be arbitrarily determined, such as the reverse order, and may be configured in the same format for all BSIDs in the same WiBro network.

The sector ID may be allocated from an alpha sector when the radio access device RAS forms three frequency bands / three sectors.

As such, the identification code (ACR ID) of the access control router (ACR) and the radio access device (RAS) are not assigned to the BSID as a location information in the WiBro network at random. In the case of including the identification code (RAS ID) and the sector identification code (Sector ID), the base station identification code (BSID) can be found in a sector of a wireless access device (RAS) belonging to an access control router (ACR). The identification code can be easily identified.

FIG. 4 is a view for explaining a procedure of performing location registration of a PSS using the base station identification code assigned by the location information allocation method in the WiBro network according to the present invention as location information.

Referring to the figure, when the portable subscriber station (PSS) enters the jurisdiction of the predetermined radio access device (RAS), the portable subscriber station (PSS) ranging after acquisition of the downlink sink and uplink transmission parameters (Ranging) Randomly select a ranging code (Ranging Code) to transmit to the corresponding radio access device (RAS), the radio access device (RAS) is a ranging response (Ranging Response) of success status (success status) By returning, ranging with the portable subscriber station (PSS) is established (step S1).

Thereafter, the radio access device RAS notifies the upper access control router ACR that the ranging for the portable subscriber station PSS is completed (step S3). At this time, the ranging completion notification message includes identification information (IP address, NAI (Network Access Identity), etc.) of the corresponding portable subscriber station (PSS) and location information (BSID) as shown in FIG. Accordingly, the access control router (ACR) receiving the ranging completion notification message uses the terminal identification information and the location information included in the message to locate a terminal located in a sector of a certain radio access device (RAS). It can be easily recognized whether it is completed.

Subsequently, the access control router (ACR) receiving the ranging completion notification message makes a location update request to the portable subscriber station (PSS) to the location management server (LMS) (step S5). Here, the location update request message includes identification information (IP address, NAI (Network Access Identity), etc.) of the corresponding portable subscriber station (PSS) and location information (BSID) as shown in FIG. Accordingly, the location management server (LMS) that receives the location update request message uses a terminal identification information and location information included in the message to determine which radio access device (RAS) belongs to which access control router (ACR). It is easy to recognize whether the location information update request for any terminal located in the sector.

Thereafter, the location management server (LMS) receiving the location update request message updates and stores the location information of the portable subscriber station (PSS) in a database, and then the location information of the portable subscriber station (PSS) has been updated. The access control router ACR is notified (step S7).

Subsequently, the access control router (ACR) receiving the location information update confirmation message for the portable subscriber station (PSS) sends a ranging completion confirmation message for the portable subscriber station (PSS) to the access control router (ACR). Notify (step S9).

As described above, the base station identification information (BSID) used as the location information of the portable subscriber station (PSS) is allocated in consideration of the topology of the network, and the information of the upper level device is included in the predetermined location information itself. The location information can be managed systematically and can be used efficiently in the call processing process.

On the other hand, the present invention is not limited to the above-described specific embodiments, it can be carried out by various modifications and modifications within the scope not departing from the gist of the present invention, the claims to which such modifications and modifications are attached If it is included in the obvious that it belongs to the present invention.

As described above, according to the present invention, rather than randomly allocating position information having a unique value in the WiBro network, it is configured by considering the topology of the network and including the information of the upper device in the predetermined position information itself. Since the location information can be systematically managed and can be efficiently used in the call processing process, the radio access device (RAS), to check the base station identification information (BSID) used as the location information of the portable subscriber station (PSS), It is possible to drastically reduce the procedure of managing and calculating location information and mutual signal transmission and reception at the access control router (ACR) and the location management server (LMS).

Claims (4)

A portable subscriber station (PSS) for data communication connection, a wireless access device (RAS) for partitioning a data communication area into predetermined sectors and performing data communication with the portable subscriber station (PSS) located in each sector; In a WiBro network including an access control router (ACR) linked to and managing a plurality of radio access devices (RAS), Location information of the portable subscriber station, an identification code of a sector to which the portable subscriber station belongs, an identification code of a wireless access device to manage a sector to which the portable subscriber station belongs, and an access control router to manage the wireless access device. Method for allocating location information in a WiBro network comprising the identification code of the configuration. The method of claim 1, And said sector identification code, said radio access device identification code and said access control router identification code are assigned the same data size. The method according to claim 1 or 2, And the location information is allocated in order of the most significant bit in the order of an access control router identification code, a wireless access device identification code, and a sector identification code. The method according to claim 1 or 2, And the location information is allocated in order of the least significant bit in the order of the access control router identification code, the radio access device identification code, and the sector identification code.

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