JP5121640B2 - Wireless communication system and wireless communication method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless communication system capable of reducing the number of times of transmission of a health check message or the like, and reducing the storage of an unwanted wireless section terminal ID. <P>SOLUTION: In the wireless communication system, a database 106 manages a wireless terminal information table indicating the correspondence between a wireless terminal 101 and wireless base stations 102, 103 of connection destinations; the wireless base stations 102, 103 each manage a second wireless terminal information table indicating the correspondence between the wireless terminal 101 connected to the own station and the wireless section terminal ID unique per base station, a wireless base station control device 105 acquires information from a database 106 and transmits a mobile notice if a wireless base station 102 currently connected to the wireless terminal 101 is different the former wireless base station 103 (S113), and the former wireless base station 103 deletes information about the wireless terminal from the second wireless terminal information table (S114). <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a radio communication system and a radio communication method suitable for use when providing a plurality of radio base stations that accommodate a large number of radio terminals.

  In a system in which a wireless base station is connected to a large number of wireless terminals (for example, see Non-Patent Document 1), ID (identification code) information for identifying a wireless terminal is short in order to avoid a decrease in utilization efficiency of the wireless band. For example, communication is performed by assigning a unique ID (referred to as a wireless zone terminal ID) to a wireless terminal within the wireless base station. When a wireless terminal with this wireless zone terminal ID moves and communicates with another wireless base station, the old wireless base station deletes the connection information with the wireless terminal and renews the assigned ID. Will be assigned to another wireless terminal registered in.

  In such a system, the radio base station holds connection information of the radio terminal in order to transmit and receive control information and data to and from the radio terminal. The connection information includes an ID (wireless section terminal ID) used in the wireless section. When a wireless terminal newly connects to a wireless base station, the wireless terminal transmits a connection request to the wireless base station, and the wireless base station assigns a wireless zone terminal ID. When there is no communication with the wireless terminal, the wireless base station sends a message such as a health check to the wireless terminal, confirms the presence of the wireless terminal, and if the wireless terminal responds, maintains the connection information, and the wireless terminal does not respond If so, delete the connection information. Further, when it becomes difficult to communicate with a wireless base station that has been connected due to movement, the wireless terminal newly searches for a wireless base station and connects to the new wireless base station.

Shigeru Kuwano, Daisei Uchida, Fusao Nuno and Morikatsu Takahashi, “Wireless Access Systems for Wide Area Ubiquitous Network,” NTT Technical Review, Nippon Telegraph and Telephone corporation, March 2008, Vol.6, No.3

  In the system as described above, the radio base station, for example, either deletes connection information for each communication, or confirms the existence of the radio terminal by transmitting a message such as a health check to the radio terminal. Connection information cannot be deleted. If connection information is deleted for each communication, connection processing is performed again between the wireless terminal and the wireless base station during the next communication, and a limited wireless band is consumed. The presence check by the health check periodically transmits and receives a message, and thus consumes a limited radio band.

  In addition, it is necessary to hold connection information of the wireless terminal until the health check is performed after the wireless terminal moves, which consumes a limited ID space of the wireless zone terminal ID. In other words, the radio base station needs to check the health at regular intervals and determine whether it exists based on the presence or absence of the result. It is also understood that the radio terminal has moved out of range until the next health check. Can not. In practice, unnecessary wireless terminals are registered and IDs are secured, so the efficiency of using the ID space is reduced, and long IDs are required to manage a large number of IDs. There is a problem that the use efficiency of the band is lowered.

  Therefore, when a wireless terminal connects to another wireless base station and sends a message to an NW (network) device, the connection information of the wireless terminal is deleted from the wireless base station connected so far. , It is required to delete the connection information of the wireless terminal without consuming the wireless band by instructing.

  The present invention has been made in view of the above circumstances, and is intended to improve the utilization efficiency of wireless communication resources. More specifically, the present invention reduces the number of times of sending health check messages and the like. The limited wireless bandwidth can be used effectively, and the ID space of the wireless zone terminal ID can be used effectively by reducing unnecessary holding of the wireless zone terminal ID as much as possible, and the ID length of the wireless zone terminal ID can be shortened. An object of the present invention is to provide a radio communication system and a radio communication method capable of reducing a transmission / reception size when exchanging a radio zone terminal ID in a radio zone and making it possible to effectively use a limited radio band. And

In order to solve the above-described problem, the invention described in claim 1 includes a wireless terminal, a plurality of wireless base stations that are assigned and managed with unique wireless section terminal IDs within the local station, and 1 A radio communication system comprising a radio base station control device that manages one or more radio base stations, and a database that is connected to the radio base station control device and manages the radio terminals, wherein the database is holding the first wireless terminal information table indicating the correspondence between the radio base station ID unique wire section terminal ID and the connection target radio base station throughout the network of the wireless terminals connected to the radio base station, the radio the base station holds the second wireless terminal information table indicating the correspondence between the wire section terminal ID and the radio section terminal ID of the wireless terminal connected to the own station, a connection request from the wireless terminal In contrast, with imparting radio section terminal ID of shorter ID length than wired section terminal ID of the wireless terminal, it transmits the wired section terminal ID of the radio terminal toward the base station controller, the radio base station The control apparatus, based on the wired section terminal ID of the wireless terminal received from the wireless base station, from the database, the old wireless base that is the last connection destination of the wireless terminal included in the first wireless terminal information table get the radio base station ID of the station, when the radio base station ID of the current wireless base station that is currently connected to the wireless terminal and the radio base station ID of the old radio base station are different, the old radio base station transmitting a first movement notification imparted with wire section terminal ID of the wireless terminal to, the old radio base station, when receiving the first transfer notice, offered to the mobile notification first The It was based on the wire section terminal ID of the wireless terminal, and deletes the information related to the wireless terminal from the second wireless terminal information table.

According to a second aspect of the invention, the first wireless terminal information table, the wireless base station controller that manages the radio base stations connected to a wire section terminal ID and the radio terminal of the radio terminal Including information indicating a correspondence relationship with a base station control device ID , wherein the radio base station control device includes a radio base station ID of the old radio base station that is the last connection destination of the radio terminal and the old radio from the database. get the radio base station controller ID of the old radio base station controller that manages the base station, the radio base station controller of the current wireless base station controller for managing current wireless base station that is currently connected to the wireless terminal If the ID and the radio base station controller ID of the old radio base station controller are different, the relative old radio base station controller, a radio base with wire section terminal ID of the wireless terminal the old radio base station Bureau I Send a second movement notification granted, the old radio base station controller, when receiving the second movement notification, transmits the first movement notification to the old radio base station When the old wireless base station receives the first movement notification, the old wireless base station obtains information about the wireless terminal based on the wired section terminal ID of the wireless terminal given to the first movement notification . 2 is deleted from the wireless terminal information table.

The invention according to claim 3 is a wireless terminal, a plurality of wireless base stations that are managed by assigning a unique wireless section terminal ID within the own station to a wireless terminal connected to the wireless terminal, and one or more wireless base stations A radio communication method performed in a radio communication system configured by a radio base station control apparatus that manages the radio base station and a database that is connected to the radio base station control apparatus and manages the radio terminal, wherein the database includes the database holding the first wireless terminal information table indicating the correspondence between the radio base station ID of the entire network of the wireless terminals connected to the radio base station a unique wire section terminal ID connection target radio base station, the radio base station holds the second wireless terminal information table indicating the correspondence between the wire section terminal ID and the radio section terminal ID of the wireless terminal connected to the own station, the connection request from the wireless terminal To, as well as impart radio section terminal ID of shorter ID length than wired section terminal ID of the wireless terminal, it transmits the wired section terminal ID of the radio terminal toward the base station controller, the radio base station The control apparatus, based on the wired section terminal ID of the wireless terminal received from the wireless base station, from the database, the old wireless base that is the last connection destination of the wireless terminal included in the first wireless terminal information table get the radio base station ID of the station, when the radio base station ID of the current wireless base station that is currently connected to the wireless terminal and the radio base station ID of the old radio base station are different, the old radio base station transmitting a first movement notification imparted with wire section terminal ID of the wireless terminal to, the old radio base station, when receiving the first transfer notice, offered to the mobile notification first Is Based on the wire section terminal ID of the wireless terminal, and deletes the information related to the wireless terminal from the second wireless terminal information table.

Invention of claim 4, wherein the first wireless terminal information table, the wireless base station controller that manages the radio base stations connected to a wire section terminal ID and the radio terminal of the radio terminal Including information indicating a correspondence relationship with a base station control device ID , wherein the radio base station control device includes a radio base station ID of the old radio base station that is the last connection destination of the radio terminal and the old radio from the database. get the radio base station controller ID of the old radio base station controller that manages the base station, the radio base station controller of the current wireless base station controller for managing current wireless base station that is currently connected to the wireless terminal If the ID and the radio base station controller ID of the old radio base station controller are different, the relative old radio base station controller, a radio base with wire section terminal ID of the wireless terminal the old radio base station Bureau I Send a second movement notification granted, the old radio base station controller, when receiving the second movement notification, transmits the first movement notification to the old radio base station When the old wireless base station receives the first movement notification, the old wireless base station obtains information about the wireless terminal based on the wired section terminal ID of the wireless terminal given to the first movement notification . 2 is deleted from the wireless terminal information table.

  According to the present invention, the first radio terminal information table indicating the correspondence between the radio terminal connected to the radio base station and the connection-destination radio base station in the database is managed, and the radio base station is connected to the own station. A second wireless terminal information table indicating a correspondence relationship between a wireless terminal and a wireless section terminal ID unique within the local station, and a location registration request from the wireless terminal, a call to the wireless terminal, or a communication request in the wireless base station A wireless section terminal ID is given to a connection request from a wireless terminal that occurs at the time, and information for identifying the wireless terminal is transmitted to the wireless base station control device. In the wireless base station control device, the wireless terminal When the radio base station currently connected to the old radio base station is different from the old radio base station, the first mobile station is provided with information identifying the radio terminal for the old radio base station. When the old wireless base station receives the first movement notification, the information about the wireless terminal is deleted from the second wireless terminal information table.

  Therefore, according to the present invention, it is possible for the radio base station to detect the movement of the radio terminal without sending a health check message from the radio base station to the radio terminal, reducing the number of times the health check message is transmitted, or The health check message can not be transmitted, and the limited wireless band can be used effectively. Further, since the connection information can be deleted faster than the transmission / reception of the health check message, the ID space of the wireless zone terminal ID can be used effectively. In addition, the effective use of the ID space can shorten the ID length of the wireless zone terminal ID, reduce the transmission / reception size when the wireless zone terminal ID is exchanged in the wireless zone, and effectively use the limited radio band it can.

  According to another configuration of the present invention, the current radio base station control device that manages the radio base station currently connected to the radio terminal is different from the old radio base station control device that manages the old radio base station. To the old radio base station control device, a second movement notification to which information for identifying the radio terminal and the radio base station is added is transmitted to the old radio base station control device. Is received from the second wireless terminal information table, the first wireless communication station transmits a first movement notification to the wireless base station. When the old wireless base station receives the first movement notification, information on the wireless terminal is obtained from the second wireless terminal information table. Removed. Therefore, it is possible to cope with movement across the radio base station controller.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of an entire communication network including a wireless communication system as an embodiment of the present invention. A wireless communication system according to an embodiment of the present invention includes a plurality of wireless terminals 101 (only one is shown in FIG. 1), a plurality of wireless base stations 102, 103, and 104 that accommodate them on a wireless line, a wireless base station A plurality of radio base station controllers 105 and 107 that control 102, 103, or 104, a plurality of databases 106 and 108 that store the area where the radio terminal 101 is located, and other radio terminals that communicate with the radio terminal 101 (not shown) Z). It is assumed that each wireless terminal 101 is assigned a wired section terminal ID that identifies each terminal.

  In addition, in the databases 106 and 108, terminal information corresponding to each wireless terminal 101 is distributed and managed by a plurality of devices. That is, if the location information (connection information) of the wireless terminal 101 is managed in either of the databases 106 and 108, the location information of the wireless terminal is obtained by making an inquiry to any of the plurality of databases 106 and 108. Be able to.

  FIG. 1 shows an example of the configuration of the present embodiment and its peripheral part. The terminals, devices, networks, etc. shown in FIG. 1 are more or more distributed, or have a hierarchical structure. May be configured, or may be integrated and centrally managed.

  In the example shown in FIG. 1, the radio base station 102 and the radio base station 103 are managed (controlled) by the radio base station control device 105, and the radio base station 104 is managed by the radio base station control device 107. . Further, the radio base station controller 105 and the database 106 are connected, the radio base station controller 107 and the database 108 are connected, and the radio base station controller 105 and the radio base station controller 107 are connected to a wired or wireless communication network. Are connected to each other by a network 109 so that information can be transmitted and received between them.

  The network 109 is connected to another network 111 via the gateway 110. The gateway 110 is also connected to the database 106 and the database 108. An IP (Internet Protocol) terminal 112 is connected to the network 111.

In the present embodiment, radio base station controllers 105 and 107 read / write terminal information from / to databases 106 and 108 as necessary. The radio base station controllers 105 and 107 manage one or a plurality of radio base stations 102 to 104, and the management is performed for each paging area that is a unit of location management of the radio terminal 101. For example, when calling the wireless terminal 101, a plurality of wireless base stations belonging to the same paging area are simultaneously called to the wireless terminal 101. In this embodiment, it is assumed that each radio base station controller 105 and 107 manages one paging area. That is, it is assumed that each radio base station controller 105 and 107 and each paging area correspond one-to-one.
Each radio base station controller 105 and 107 can manage a plurality of paging areas. Further, the boundary of the paging area may be different depending on each wireless terminal 101.

  Further, in the present embodiment, radio base station IDs for identifying the radio base stations 102, 103, and 104 are assigned to the radio base stations 102, 103, and 104, respectively. A base station control apparatus ID is assigned to each paging area, and a paging area ID for identifying each paging area is assigned to each paging area.

  Further, in each database 106 and 108, the radio terminal information table corresponding to each radio terminal 101 accommodated by each radio base station controlled by each radio base station controller 105 and 107 connected to each database is distributed and managed. ing. Further, in each of the radio base stations 102 to 104, a radio terminal information table corresponding to each radio terminal 101 accommodated in each radio base station is managed. In each radio base station control device 105 and 107, a radio terminal information table (this is called a visited list) corresponding to each radio terminal 101 accommodated in each radio base station controlled by each radio base station control device is managed. Has been.

  The gateway 110 is between the radio base station controllers 105 and 107 and the IP terminal 112, and connects the networks 109 and 111 to which they belong. Also, terminal information is read from and written to the databases 106 and 108 as necessary.

  The IP terminal 112 is an end terminal that is connected to the gateway 110 and exchanges data with the wireless terminal 101. That is, the IP terminal 112 can connect to each wireless terminal 101 using the wired section terminal ID assigned to each wireless terminal 101.

  FIG. 2 shows a wireless terminal information table 201 in the databases 106 and 108 in FIG. This table 201 stores location information from all the wireless terminals 101 in service. The location information includes, as a key, a wired section terminal ID for identifying the wireless terminal 101, a paging area (PA) ID for each of the wireless base station control devices 105 and 107 related to the connection of the wireless terminal 101, a wireless base station ID, And a radio base station control device ID. Here, the current paging area ID is included, and the radio base station ID includes the current and previous connection (current radio base station ID and old radio base station ID). Also, the current radio base station controller ID is included.

  FIG. 3 shows a wireless terminal information table 202 in the wireless base stations 102-104. The wireless terminal information table 202 holds information on a wireless zone terminal ID and an ID (wired zone terminal ID) used in the wired network. The ID of the wireless section is unique within the wireless base station, and the ID used in the wired network is unique throughout the network. Therefore, the ID length is “ID length of wireless section terminal ID” <“ID length of wired section terminal ID”. Since wireless band resources are precious in the wireless section, the use of a wireless section terminal ID with a short ID length shortens the bit length transmitted and received in the wireless section, so that the wireless band can be used effectively. Wireless terminal information such as intermittent intervals may be added to the wireless terminal information table 202.

  FIG. 4 shows an example of a wireless terminal information table (located area list) in the wireless base station control devices 105 and 107. The information of the wireless terminal 101 such as the current wireless base station ID can be referred to using the wired section terminal ID as a key. However, the wireless terminal information tables of the wireless base station controllers 105 and 107 are not essential. However, if the radio base station controllers 105 and 107 hold the radio terminal information table, there is an advantage that the databases 106 and 108 do not have to be referred to in order to obtain the information of the radio terminal 101.

  In FIG. 5, when the wireless terminal 101 registers (connects) to another wireless base station 102 (wireless base station A), a movement notification is given to the wireless base station 103 (wireless base station B) that has been connected so far. The sequence when transmitting is shown. The wireless terminal 101 receives the notified paging area ID from the wireless base station 102 (step S101). If the paging area to which the wireless terminal 101 belongs so far is different from the notified paging area (step S102), the location registration is performed. Perform (step S105). First, before making a location registration request (step S105), a connection request is transmitted to the wireless base station 102 (step S103), and a wireless zone terminal ID is notified by a connection response (step S104). As a result, the wireless terminal 101 and the wireless base station 102 can transmit and receive messages to and from each other using the wireless zone terminal ID.

  Thereafter, the wireless terminal 101 transmits a location registration request to the wireless base station 102 together with the wired section terminal ID (step S105). The radio base station 102 assigns its own radio base station ID and paging area ID, and transmits a location registration request message to the radio base station control device 105 (step S106). The radio base station controller 105 transmits a location registration request message to the database 106 (step S107). The database 106 copies the entry of the current radio base station ID of the radio terminal 101 that is the transmission source of the location registration request in the radio terminal information table 201 to the entry of the old radio base station ID, and the radio base station ID of the received location registration request message To the entry of the current radio base station ID, and the location information of the radio terminal 101 is updated (step S108). That is, in this case, the radio base station ID of the radio base station 102 (radio base station A) is written in the entry of the current radio base station ID, and the radio base station ID of the radio base station 103 (radio base station B) is the old radio It is written in the base station ID entry.

Next, the database 106 adds a wired section terminal ID, a paging area ID (PA-ID), a radio base station ID (= current radio base station ID), and an old radio base station ID, and then sends a location registration response message. Transmit to the radio base station controller 105 (step S109). Next, the radio base station control apparatus 105 gives a wired section terminal ID and transmits a location registration response message to the radio base station 102 (step S110). The wireless base station 102 describes the correspondence between the wireless zone terminal ID and the wired zone terminal ID in the wireless terminal information table 202 (step S111).
Since communication in the wireless section is performed using the wireless section terminal ID, the wireless section terminal ID of the wireless terminal 101 that is the source of the location registration request message can be known. For example, in TDMA, the radio base station 102 designates a transmission slot as a broadcast information using a radio section terminal ID. For this reason, the radio base station 102 can determine that the message from the transmission slot has been transmitted from the radio terminal 101 of the designated radio section terminal ID. The wireless base station 102 can determine the correspondence between the wireless zone terminal ID and the wired zone terminal ID by holding the information of the wireless zone terminal ID until the location registration response is received. .

  On the other hand, the radio base station controller 105 is. The current radio base station ID of the radio terminal 101 is compared with the old radio base station ID (step S112). If they are different, the radio base station controller 105 gives a wired section terminal ID and a radio base station ID to the old radio base station and transmits a movement notification (step S113). The old radio base station 103 searches the radio terminal information table 202 with the wired section terminal ID, deletes the connection information of the radio terminal 101, and disconnects the connection with the radio terminal 101 (step S114).

  In FIG. 6, when the wireless terminal 101 makes an authentication request to another wireless base station 102 (wireless base station A), a movement notification is transmitted to the wireless base station 103 (wireless base station B) connected so far. Shows the sequence. When the wireless terminal 101 receives a communication request or receives a call request (step S201), it makes an authentication request (step S204). First, before making an authentication request (step S204), a connection request is transmitted to the radio base station 102 (step S202), and a wireless zone terminal ID is notified by a connection response (step S203). As a result, the wireless terminal 101 and the wireless base station 102 can transmit and receive messages to and from each other using the wireless zone terminal ID.

  Thereafter, the wireless terminal 101 transmits an authentication request together with the wired section terminal ID to the wireless base station 102 (step S204). The radio base station 102 gives its own radio base station ID and paging area ID, and transmits an authentication record request message to the radio base station control device 105 (step S205). The radio base station control apparatus 105 transmits a location registration request message to the database 106 when the predetermined authentication process is performed and the authentication process is normally performed (step S206). The database 106 copies the entry of the current wireless base station ID of the wireless terminal 101 that is the transmission source of the location registration request (in this case, the transmission source of the authentication request) in the wireless terminal information table 201 to the entry of the old wireless base station ID. Then, the radio base station ID of the received location registration request message is written in the entry of the current radio base station ID, and the location information of the radio terminal 101 is updated (step S207). That is, in this case, the radio base station ID of the radio base station 102 (radio base station A) is written in the entry of the current radio base station ID, and the radio base station ID of the radio base station 103 (radio base station B) is the old radio It is written in the base station ID entry.

  Next, the database 106 includes a wired section terminal ID, a paging area ID (PA-ID), a wireless base station ID (= current wireless base station ID), and an old wireless base station ID (wireless base station A in the sequence example). Then, a location registration response message is transmitted to the radio base station controller 105 (step S208). Next, the radio base station control apparatus 105 assigns a wired section terminal ID and transmits an authentication response message to the radio base station 102 (step S209). The wireless base station 102 describes the correspondence between the wireless zone terminal ID and the wired zone terminal ID in the wireless terminal information table 202 (step S210).

  On the other hand, the radio base station controller 105 is. The current radio base station ID of the radio terminal 101 is compared with the old radio base station ID (step S211). If they are different, the radio base station controller 105 gives a wired section terminal ID and a radio base station ID to the old radio base station, and transmits a movement notification (step S212). The old radio base station 103 searches the radio terminal information table 202 with the wired section terminal ID, deletes the connection information of the radio terminal 101, and disconnects the connection with the radio terminal 101 (step S213).

  FIG. 7 shows a sequence when the radio base station 102 periodically performs a health check on the radio terminal 101. The radio base station 102 periodically transmits a health check request message to the radio terminal 101 in the radio information table 202 held by the radio base station 102 (step S301). If the wireless terminal 101 is in the radio wave arrival area of the wireless base station 102 and maintains a connection with the wireless base station 102, the wireless terminal 101 returns a health check response (step S302). If the wireless base station 102 does not receive a health check due to movement of the wireless terminal 101 and the wireless base station 102 cannot receive a health check response (step S303), the wireless terminal 101 does not contact the wireless base station 102. It is determined that the wireless terminal 101 is not connected, the connection information of the wireless terminal 101 is deleted from the wireless terminal information table 202, and the connection with the wireless terminal 101 is disconnected (step S304).

  FIG. 8 shows a movement notification sequence for the radio base station controller 107 (radio base station controller B). When the wireless base station control device 107 also holds the wireless terminal information table 203 such as a location list, if the wireless terminal 101 moves across the wireless base station control device, the old wireless base station control device 107 It is necessary to delete the information of the wireless terminal 101 in the wireless terminal information table 203. If it is not deleted, old information remains, and if it is referenced later, a malfunction may occur. In this case, the database 106 holds the paging area ID corresponding to the ID of the radio base station controller 107, and when the database 106 receives the location registration request (step S401), the location information in the radio terminal information table 201 is updated. Then, the current radio base station ID is set to the old radio base station ID (step S402). The processes before step S401 are performed in the same manner as steps S101 to S106 in FIG. 5 or steps S201 to S205 in FIG.

  Further, the current radio base station ID is set as the radio base station ID of the location registration request (step S402). Then, the current radio base station control device ID is registered as the old radio base station control device ID of the location registration response message, and the location registration request transmission source radio base station control device 105 is registered as the current radio base station control device ID (step S402). ). When the location registration response is transmitted to the radio base station controller 105 together with the old radio base station controller ID (step S403), the radio base station controller 105 transmits the old radio transmitted with its own radio base station controller ID. The base station controller ID is compared (step S404), and if they are different, the information of the wireless terminal 101 is described in the wireless terminal information table 203 (step S405), and the old wireless base station controller 107 ( In the figure, for the wireless base station controller B), the wired section terminal ID, the current wireless base station ID (the wireless base station that transmitted the location registration request), and the old wireless base station ID (the wireless base station 104 in the figure) The movement notification to which is given is transmitted (step S406). The old radio base station control device 107 that has received the movement notification transmits a movement notification after giving a wired section terminal ID and a radio base station ID to the base station 104 to which the wireless terminal 101 has been connected. (Step S407), the wireless terminal information is deleted from its own wireless terminal information table 203 (Step S408). On the other hand, the old radio base station 104 searches the radio terminal information table 202 with the wired section terminal ID, deletes the connection information of the radio terminal 101, and disconnects the connection with the radio terminal 101.

  As described above, according to the present embodiment, connection information of all wireless terminals is managed in the database, and when a new terminal registration request, communication request, or call request occurs in the wireless base station to which the wireless terminal is moved In addition, the location registration request is notified to the database via the radio base station controller. In the database, the connection contents shown in the wireless terminal information table are updated, and information on the old wireless base station connected so far is notified to the wireless base station controller. The radio base station controller notifies the old radio base station that the radio terminal has moved, and the old radio base station deletes the connection information of the radio terminal. As a result, it is possible to grasp the movement of the wireless terminal without waiting for the health check in the wireless base station, and quickly release the wireless zone terminal ID assigned to the wireless terminal, by the effective use of the ID space and the short ID Wireless band effective utilization can be realized.

  That is, in this embodiment, when a location registration request or an authentication request is made from the wireless terminal to the wireless base station, or when a communication request to the wireless terminal or a call request to the wireless terminal is made, the database or Since the wireless terminal information table for managing the connection information of the wireless terminal managed by the wireless base station or the wireless base station controller is updated, a health check message is sent from the wireless base station to the wireless terminal. In addition, the movement of the wireless terminal can be detected by the wireless base station, the number of health check message transmissions can be reduced, and the limited wireless band can be used effectively. Further, since the connection information can be deleted faster than the transmission / reception of the health check message, the ID space of the wireless zone terminal ID can be used effectively. In addition, the effective use of the ID space can shorten the ID length of the wireless zone terminal ID, reduce the transmission / reception size when the wireless zone terminal ID is exchanged in the wireless zone, and effectively use the limited radio band it can.

  Note that the embodiment of the present invention is not limited to the above, and for example, a part or all of the information in the wireless terminal information table that is to be distributedly managed in the database, for example, other wireless base station control devices, etc. Changes such as distributed management in the configuration or centralized management can be appropriately performed. A part or all of the configuration of the present invention can be constructed by a computer and its peripheral devices and a program executed by the computer, and the program is distributed via a computer-readable recording medium or a communication line. It is possible.

It is a block diagram of the whole network for describing embodiment of the radio | wireless communications system by this invention. It is a figure which shows an example of the radio | wireless terminal information table in the databases 106 and 108 of FIG. FIG. 2 is a diagram illustrating an example of a wireless terminal information table in wireless base stations 102 to 104 in FIG. 1. FIG. 2 is a diagram illustrating an example of a wireless terminal information table in wireless base station control devices 105 and 107 in FIG. 1. It is a figure which shows the flow of the process in the case of the position registration in embodiment of the radio | wireless communications system shown in FIG. It is a figure which shows the flow of the process in the case of the authentication process in embodiment of the radio | wireless communications system shown in FIG. It is a figure which shows the flow of the process in the case of the health check in embodiment of the radio | wireless communications system shown in FIG. It is a figure which shows the flow of a process in the case of the movement notification with respect to the radio base station control apparatus in embodiment of the radio | wireless communications system shown in FIG.

Explanation of symbols

101 wireless terminal
102-104 radio base station
105, 107 Radio base station controller
106, 108 database
201 Wireless terminal information table in database
202 Wireless terminal information table in wireless base station
203 Radio terminal information table in radio base station controller

Claims (4)

A radio base station control that manages a radio terminal, a plurality of radio base stations that are managed by assigning a unique radio section terminal ID within the own station to a connection-destination radio terminal, and one or more radio base stations A wireless communication system comprising a device and a database connected to the wireless base station control device and managing the wireless terminal,
The database holds a first wireless terminal information table indicating a correspondence relationship between a wired section terminal ID unique to the entire network of wireless terminals connected to the wireless base station and a wireless base station ID of a connected wireless base station. And
The radio base station holds the second wireless terminal information table indicating the correspondence between the wire section terminal ID and the radio section terminal ID of the wireless terminal connected to the own station, to a connection request from the wireless terminal A wireless section terminal ID having an ID length shorter than the wired section terminal ID of the wireless terminal , and transmitting the wired section terminal ID of the wireless terminal to the wireless base station control device,
The wireless base station control device determines the last connection destination of the wireless terminal included in the first wireless terminal information table from the database based on the wired section terminal ID of the wireless terminal received from the wireless base station. get the radio base station ID of a old radio base station, when the radio base station ID of the radio base station ID of the current wireless base station that is currently connected to the wireless terminal the old radio base station are different, the Send the first movement notification with the wired section terminal ID of the wireless terminal to the old wireless base station,
When the old wireless base station receives the first movement notification, the old wireless base station determines from the second wireless terminal information table based on the wired section terminal ID of the wireless terminal given to the first movement notification. A wireless communication system, wherein information relating to the wireless terminal is deleted. The first wireless terminal information table corresponds to a wired section terminal ID of the wireless terminal and a wireless base station controller ID of the wireless base station controller that manages the wireless base station connected to the wireless terminal. Including information indicating the relationship,
The radio base station controller, the last connection destination is a the old radio base station of the radio base station ID and該旧 radio base station of the old radio base station controller that manages the radio base station of the wireless terminal from the database get the controller ID, the radio base station controller of said radio base station controller ID of the current wireless base station controller for managing current wireless base station that is currently connected to the wireless terminal old radio base station controller When the ID is different, a second movement notification with the wired section terminal ID of the wireless terminal and the wireless base station ID of the old wireless base station is transmitted to the old wireless base station control device,
When the old radio base station control device receives the second movement notification, the old radio base station control device transmits the first movement notification to the old radio base station,
When the old wireless base station receives the first movement notification, the old wireless base station obtains information on the wireless terminal based on the wired section terminal ID of the wireless terminal given to the first movement notification . The wireless communication system according to claim 1, wherein the wireless communication system is deleted from the wireless terminal information table. A radio base station control that manages a radio terminal, a plurality of radio base stations that are assigned and managed with unique radio section terminal IDs within the local station, and one or more radio base stations. A wireless communication method performed in a wireless communication system including a device and a database connected to the wireless base station control device and managing the wireless terminal,
The database holds a first wireless terminal information table indicating a correspondence relationship between a wired section terminal ID unique to the entire network of wireless terminals connected to the wireless base station and a wireless base station ID of a connected wireless base station. And
The radio base station holds the second wireless terminal information table indicating the correspondence between the wire section terminal ID and the radio section terminal ID of the wireless terminal connected to the own station, to a connection request from the wireless terminal A wireless section terminal ID having an ID length shorter than the wired section terminal ID of the wireless terminal , and transmitting the wired section terminal ID of the wireless terminal to the wireless base station control device,
The wireless base station control device determines the last connection destination of the wireless terminal included in the first wireless terminal information table from the database based on the wired section terminal ID of the wireless terminal received from the wireless base station. get the radio base station ID of a old radio base station, when the radio base station ID of the radio base station ID of the current wireless base station that is currently connected to the wireless terminal the old radio base station are different, the Send the first movement notification with the wired section terminal ID of the wireless terminal to the old wireless base station,
When the old wireless base station receives the first movement notification, the old wireless base station determines from the second wireless terminal information table based on the wired section terminal ID of the wireless terminal given to the first movement notification. A wireless communication method, wherein information relating to the wireless terminal is deleted. The first wireless terminal information table corresponds to a wired section terminal ID of the wireless terminal and a wireless base station controller ID of the wireless base station controller that manages the wireless base station connected to the wireless terminal. Including information indicating the relationship,
The radio base station controller, the last connection destination is a the old radio base station of the radio base station ID and該旧 radio base station of the old radio base station controller that manages the radio base station of the wireless terminal from the database get the controller ID, the radio base station controller of said radio base station controller ID of the current wireless base station controller for managing current wireless base station that is currently connected to the wireless terminal old radio base station controller When the ID is different, a second movement notification with the wired section terminal ID of the wireless terminal and the wireless base station ID of the old wireless base station is transmitted to the old wireless base station control device,
When the old radio base station control device receives the second movement notification, the old radio base station control device transmits the first movement notification to the old radio base station,
When the old wireless base station receives the first movement notification, the old wireless base station obtains information on the wireless terminal based on the wired section terminal ID of the wireless terminal given to the first movement notification . The wireless communication method according to claim 3, wherein the wireless communication method is deleted from the wireless terminal information table.

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