JP2008079192A - Radio base station device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio base station device in which convenience is improved for the user who has installed a radio base station device (BTS) by restricting the present BTS from being used by other MS, since when an RRC connection is requested from an MS, the MS cannot be connected to the BTS installed by the user but may occasionally be connected to other BTS in the conventional BTS, in which the number of accommodated channels is small. <P>SOLUTION: The present invention relates to a radio base station device, wherein while a user recognition ID, registered beforehand, is registered in a user recognition ID table 18 of a storage unit 17; and when RRC connection is requested from an MS via an RACH, a control unit 15 decides whether an ID (IMSI) contained in the relevant RACH agrees with an ID that is stored in the user recognition ID registration table 18. If they match, the RRC connection request is transmitted to a higher-order device; but if they do not agree, the RRC connection request is discarded, so that the MS of the user, who has installed the BTS, is capable of using the relevant BTS in a monopolistic manner. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a radio base station apparatus used in a radio communication system such as WCDMA (Wideband Code Division Multiple Access), and more particularly to a radio base station apparatus that can improve user convenience in a small cell.

A system configuration of a general wireless communication system will be described with reference to FIG. FIG. 15 is a schematic explanatory diagram illustrating a configuration of a general wireless communication system.
As shown in FIG. 15, a radio communication system using WCDMA or the like includes a mobile terminal (MS: Mobile Station, hereinafter referred to as “MS”) 1 carried by a user and a radio base station apparatus that performs radio communication with the mobile terminal. ("Base station apparatus" in the figure) (BTS: Base Transceiver Station, hereinafter referred to as "BTS") 2 and a plurality of BTSs 2 connected by a wired transmission path, and a radio network controller (RNC: Radio Network) that controls each BTS 2 Controller (hereinafter referred to as “RNC”) 3, a mobile switching center (MSC: Mobile Switching Center, hereinafter referred to as “MSC”) 4 for controlling call connection and disconnection of MS 1, and an identification number of a terminal relating to each MS 1 It consists of a home location register (HLR) 5 for managing and managing location information.
The home location register 5 is a database that also manages user information such as usable service information and billing information for each mobile terminal 1.

When the MS 1 moves into the service area of the BTS 2 or when the wireless access function becomes valid due to power-on or the like, the MS 1 performs location registration.
Here, the location registration sequence will be described with reference to FIG. FIG. 16 is an explanatory diagram showing a location registration sequence.
As shown in FIG. 16, a call connection setup request (Connection Setup Request) is transmitted from MS1 to RNC3 via BTS2 using RACH (Random Access Channel) which is a common channel (S1).

  The RNC 3 transmits a dedicated channel (DPCH) setting command to the BTS 2 (S2) and transmits a call connection setting (Connection Setup) to the MS 1 using a FACH (Forward Access Channel) (S3).

Using the DPCH, the MS 1 transmits a call connection setup completion notification (Connection Setup Complete) to the RNC 3 (S4), and further transmits a location registration request to the MSC 4 (S5).
The MSC 4 transmits an authentication request using the DPCH (S6), and upon receiving an authentication response from the MS 1 (S7), transmits a location registration request acceptance notification to the MS 1 (S8).

And MSC4 will transmit a release command to RNC3, if location registration completion is received from MS1 (S9) (S10).
RNC 3 sends a call release (Connection Release) to MS 1 (S 11), and receives a call release completion notification (Connection Release Complete) from MS 1 (S 12), sends a dedicated channel (DPCH) release command to BTS 2 ( S13), the position registration sequence is completed.
As a result, the host apparatus recognizes that MS1 is in the area of a specific BTS2, and MS1 can communicate via the BTS2.

  Incidentally, in recent years, with the increase in the number of users of mobile terminals, a method (micro cell method) for reducing the cell size covered by one base station apparatus has been implemented. Smaller cells have also been introduced to provide services in local areas at home and in the office.

Thus, when the service area is small, the number of accommodated channels of the BTS 2 is small (for example, 4 users).
In the conventional wireless communication system, the use is not restricted by the user as long as it is within the maximum number of channels accommodated by the BTS 2, and the channel is free when there is an RRC (Radio Resource Control) connection request such as a call connection request. If there was, it was supposed to be accommodated.

An outline of a conventional RRC connection sequence will be described with reference to FIG. FIG. 17 is an explanatory diagram showing an outline of an RRC connection sequence in a conventional wireless communication system.
As shown in FIG. 17, in the conventional wireless communication system, when there is an RRC connection request from the MS 1 using the RACH, the BTS 2 passes the request to the host device (RNC 3) without any particular limitation. As a result, the connection setting sequence is executed, and the RRC connection setting is transmitted from the higher-level device to MS1, and MS1 returns completion of RRC connection and completes.

  However, when the number of accommodated channels is small, such as BTS2 installed in the home or office, if the RRC connection request is transmitted to the upper device without limitation as described above, the BTS2 is occupied and used. When a user who installs the BTS (a user in the home or office) makes an RRC request because he wants to do so, there is no available storage channel and he or she must be connected to another BTS 2.

Such a situation will be described with reference to FIG. FIG. 18 is a schematic explanatory diagram illustrating a problem in the conventional wireless communication system.
In FIG. 18, “Own BTS” is a BTS (BTS in the home or office) provided for the user to communicate using “Own MS”, and “Other MS” is an MS unrelated to the user. “Other BTS” is a BTS unrelated to the user.

  Normally, when the own MS sends an RRC connection request, it is sent to the host device via the own BTS. However, as shown in the example of FIG. 18, the other MS is using the own BTS, and the own BTS is accommodated. If there is no more free channel, the MS will perform a cell search and connect to another BTS (another BTS).

As a conventional technique related to the radio base station apparatus, Japanese Patent Laid-Open No. 2003-116178 “W-CDMA radio base station” published on April 18, 2003 (Applicant: Hitachi Kokusai Electric Inc., Inventor: Four) Koji).
This prior art is a radio base station that allocates an optimum channel based on parameters received from an external network, and the control unit switches the preamble detection unit / path search unit to preamble detection or path search based on the parameters. This is a W-CDMA radio base station apparatus that changes the allocation of the RACH number and the DPCH number, and can dynamically change the allocation of the RACH number and the DPCH number according to the cell radius and the signature number.

JP 2003-116178 A

  However, in the conventional radio base station apparatus (BTS), when there is an RRC connection request from the MS, the BTS accepts the RRC connection request unconditionally if the number of accommodated channels is empty. When this was done, there was a problem that another MS was using its own BTS and was unable to connect to the own BTS and had to connect to another BTS, which was inconvenient.

  The present invention has been made in view of the above situation, and can restrict the use of a BTS by an MS that is not authorized to use the BTS, and can improve the convenience of the user who installed the BTS. An object is to provide a station apparatus.

  The present invention for solving the problems of the conventional example described above is a wireless base station of a wireless communication system comprising a control unit that performs control to receive an RRC connection request from a mobile terminal and transmit it to a host device of the wireless communication system A station device is provided with a storage unit having a user recognition ID table for storing the ID of a mobile terminal registered in advance, and is included in the request when the control unit receives an RRC connection request from the mobile terminal It is determined whether or not the ID of the requesting mobile terminal is stored in the user recognition ID table, and if it is stored, control is performed so as to transmit the RRC connection request to the host device. A control unit that performs control so as not to transmit an RRC connection request to a host device when it is not stored in the recognition ID table. To have.

  When the control unit receives an RRC connection request from a mobile terminal, the radio base station apparatus of the present invention determines whether the ID of the requesting mobile terminal included in the request is stored in the user recognition ID table. If the mobile terminal ID is not stored in the user recognition ID table, the RRC connection request is transmitted to the host device. Since the wireless base station device controls the wireless base station device so that the mobile terminal ID of the user who installed the wireless base station device is registered in the user recognition ID table, the wireless base station device by the unregistered mobile terminal The radio base station device can be used exclusively by only the mobile terminal that has the authority to use it. There is an effect that can be in the small radio base station apparatus to improve the convenience of the user who placed the radio base station apparatus.

Embodiments of the present invention will be described with reference to the drawings.
The radio base station apparatus (BTS) according to the embodiment of the present invention transmits an RRC connection request to an upper apparatus only when an RRC connection is requested from a pre-registered MS, and an upper apparatus when a request is made from other MS1 The specific MS having the authority to use the BTS can exclusively use the BTS, and the convenience can be improved.

  Also, the radio base station apparatus according to the embodiment of the present invention subtracts the number of registered MSs from the maximum number of accommodated channels when the number of registered MSs is smaller than the maximum number of accommodated channels of the BTS. As for the number, even if the MS is not registered, the RRC connection request is transmitted to the host device, and the specific MS can preferentially use the BTS, and if there is a surplus in the number of accommodated channels, the other MS The RTS connection request from the server can also be received and the BTS can be used effectively.

The radio communication system according to the embodiment of the present invention has basically the same configuration as that of the general radio communication system shown in FIG. ing.
FIG. 1 is a configuration block diagram of a radio base station apparatus (first apparatus) in the radio communication system according to the first embodiment of the present invention.

  As shown in FIG. 1, the radio base station apparatus according to the first embodiment includes a radio unit 11, a modem unit 12, a signal processing unit 13, a transmission path interface unit 14, a control unit 15, a main unit, The memory 16 includes a storage unit 17, an interface unit 19, and a display unit 20. The storage unit 17 is provided with a user recognition ID table 18 as a characteristic part of the present apparatus.

Each component will be described.
The radio unit 11 performs radio transmission / reception with a mobile terminal (MS).
The modem unit 12 performs primary modulation and spreading processing of the transmission signal, despreading processing and primary demodulation of the reception signal.

The signal processing unit 13 is configured by a DSP (Digital Signal Processor) or the like, and performs encoding / decoding accompanying transmission / reception. Further, the radio base station apparatus of the present invention extracts the IMSI that is the MS identification number included in the RACH, as will be described later.
The transmission path interface 14 is connected to a wired transmission path connected to the host device, and performs protocol conversion and transmission / reception associated with data transmission / reception.

  The control unit 15 is configured by a CPU or the like, and controls the entire apparatus by expanding and starting a processing program stored in the storage unit 18 in the main memory 16. Specifically, writing / reading of data to / from the storage unit 17 and display control of the display unit 20 are performed, and user registration processing (processing in “registration mode”), which is a characteristic part of the apparatus, and RRC connection request are performed. In this case, a user determination process is performed.

The storage unit 17 stores various data such as a BTS identification ID and a scrambling code in addition to the processing program in the control unit 15 and the user recognition ID table 18.
Although not shown, the user recognition ID table 18 stores the IDs of MS1 registered in advance as a list. Here, IMSI (International Mobile Subscriber Identity), which is the MS's unique number, is used as the user identification ID, but IMEI (International Mobile Equipment Identity), which is the same unique number, and other information such as the user An arbitrary password may be used. Usually, in WCDMA, the IMSI is included in the RACH message. Further, the number of IDs that can be registered in the user recognition ID table 16 may be within the maximum accommodation number of the BTS 2 or more than the maximum accommodation number.

The interface unit 19 connects to peripheral devices such as the display unit 20. In addition, an interface such as Ethernet (registered trademark), Bluetooth (registered trademark), infrared communication, a USIM (Universal Subscriber Identity Module) card, a USB connector, or the like is provided as necessary to connect to various external devices.
The display unit 20 performs display according to instructions from the control unit 15.

In addition, the configuration of the mobile terminal (MS) in the wireless communication system using the first device is substantially the same as the conventional one, and is not shown in the figure, but a wireless unit that performs wireless communication, a display unit that displays data, and A storage unit for storing data, a key input unit for inputting instructions by a user, an input unit such as a GUI (Graphical User Interface), and control of the entire apparatus such as data conversion, transmission / reception control and display control associated with wireless communication And a control unit for performing.
However, part of the processing in the control unit is different, and a “registration mode” for registering its own ID in the user recognition ID table 18 of the radio base station apparatus is provided.

Here, an outline of an operation in a radio communication system using the radio base station apparatus according to the first embodiment will be described with reference to FIG. FIG. 2 is an explanatory diagram showing an outline of the operation of the wireless communication system using the first device.
As shown in FIG. 2, in the wireless communication system using the first device, the ID held by the own MS is registered in the user recognition ID table of the first device (“own BTS” in the figure). When the RRC connection request is received from the MS, the control unit 15 of the own BTS reads the MS ID included in the request, and only when the ID is registered in the user recognition table Is transmitted to the host device so that the BTS can be used.

  As a result, the local MS registered in the user recognition ID table of the local BTS can use the BTS, but other MSs that are not registered cannot use the local BTS, for example, the home where the local BTS is installed. By registering the MS ID of the user in the office or office in the user recognition ID table, the user in the home or office can occupy and use the own BTS, and the convenience of the user who provided the BTS It is possible to improve the property.

Before describing user registration, the initial setting of MS and BTS will be briefly described.
First, as an initial setting, an ID for identifying a BTS to be occupied (hereinafter referred to as “BTS identification ID”) is acquired and stored on the MS side. As the BTS identification ID, a BTS serial number, a password uniquely set in the BTS by the user, or the like can be considered. The BTS identification ID needs to be recognized by both the MS side and the BTS side.

  On the BTS side, when a serial number is used as the BTS identification ID, no special initial setting is required. However, when the user sets a password as the BTS identification ID, for example, an Ethernet (registered trademark) interface is set on the BTS 2. It is conceivable that the user registers the password from the PC by connecting to the PC. Alternatively, when the BTS has an interface, a password may be registered in the BTS from the MS side via infrared communication or Bluetooth (registered trademark). The format of the password is not particularly defined, but for example, a user can set arbitrary alphanumeric characters with a fixed length (32 bytes).

Next, a method for user registration in the user recognition ID table 18 of the first apparatus will be described.
First, a user registration method on the MS side in a radio communication system using the first apparatus as a radio base station apparatus will be described with reference to FIG. FIG. 3 is a flowchart showing a user registration method in the control unit of the MS of the wireless communication system using the first device.
As shown in FIG. 3, in the MS, when the “registration mode” is set by the user via the GUI or the like (100), the control unit of the MS (hereinafter simply referred to as MS) is acquired in advance by initial setting. The BTS identification ID that has been set is added to the RACH and an RRC connection is transmitted (102). A processing program corresponding to the registration mode is stored in the storage unit in advance, and when the registration mode is set, the control unit reads the processing program for the registration mode, expands it in the main memory, and starts the processing. is there.

  Further, the MS acquires parameters such as a scrambling code of the registration destination BTS as means for identifying the BTS. The MS obtains in advance the scrambling code of the registration destination BTS and the BTS of the adjacent cell from the common control channel, thereby enabling identification of the BTS.

  Then, the MS determines whether or not a registration completion notification of the user identification ID has been received from the BTS (104). If the MS has not received the registration completion, the MS determines whether or not a timeout (TO) has occurred (106). If it has not timed out, it returns to the process 102 and transmits the RRC connection again.

  If the process 106 times out, the MS determines that the registration is NG, displays “registration NG” on the display unit, notifies the user, deletes the acquired parameter, and cancels the registration mode. (108).

If the notification of registration completion of the user identification ID is received from the BTS in the process 104, the MS determines that the registration is OK, displays “registration complete” on the display unit, notifies the user, and sets the registration mode. Release (110).
In this way, user registration processing of a mobile terminal in a wireless communication system using the first device as a wireless base station device is performed.

Next, a user registration method in the first radio base station apparatus will be described with reference to FIG. FIG. 4 is a flowchart showing a user registration method in the control unit 15 of the first radio base station apparatus.
As shown in FIG. 4, when the registration mode is set by the mode change switch (not shown) in the BTS (200), the control unit 15 of the BTS activates the processing program for the registration mode, and the RACH is transmitted from the MS. It is determined whether it has been received (202).

  When receiving the RACH, the BTS control unit 15 transmits a parameter such as a scrambling code to the MS, extracts the BTS identification ID from the RACH (204), and stores the read BTS identification ID by itself. It is determined whether or not it matches the BTS identification ID being made (206).

  If the BTS identification IDs match, the control unit 15 reads the IMSI included in the RACH, registers it in the user recognition ID table 16 (212), determines that the registration is OK, and “registers” with the MS. "Complete" is transmitted (214), and the registration mode is canceled.

  When the RACH is not received in the process 202 and when the BTS identification ID extracted from the RACH in the process 206 does not match the stored BTS identification ID, the control unit 15 sets a timeout (TO). If it has not timed out, the process proceeds to process 202 and waits for RACH again.

If the process 210 times out, the processing unit 15 determines that the registration is NG, transmits “registration NG” to the MS for notification, and displays “registration NG” on the display unit 17 for registration. The mode is released (220).
In this way, user registration processing in the BTS is performed.

  In the BTS of the present invention, a method of reading and registering the IMSI stored in the USIM card is also possible. The USIM card is an IC card composed of a telephone number, a user ID, an arbitrary memory area, and the like. Usually, the USIM card is used by being inserted into an MS, but here, a USIM connector is attached to the interface unit 19 of the radio base station apparatus. The USIM card is inserted here to register the IMSI.

  Specifically, when a USIM card is inserted into the USIM connector of the interface unit 19, the control unit 15 reads the IMSI information stored in the USIM card and stores it in the user recognition ID table 18 of the storage unit 17. To register.

Next, an RRC connection sequence in a radio communication system using the first device will be described with reference to FIG. FIG. 5A is a sequence explanatory diagram when the MS ID is registered in the user recognition ID table 18, and FIG. 5B is a sequence description when the MS ID is not registered in the user recognition ID table 18. FIG.
As shown in FIG. 5A, when the user identification ID is registered, the MS transmits its RRC connection request with its own ID (IMSI) added to the RACH (S21).

  In the BTS (first device), as the received ID determination process, it is determined whether or not the ID (IMSI) included in the received RACH is registered in the user recognition ID registration table 18, so that it is registered. An RRC connection request is transmitted to the host device (S22). Here, the MS ID is not added to the RRC connection request from the BTS to the host device.

  Then, a connection setting sequence is performed between the BTS and the host device. When the setting is completed, the RRC connection setting is transmitted from the host device to the MS (S23), and the MS transmits the RRC connection completion to the host device and sequence. Exit.

  Further, as shown in FIG. 5B, even if the MS transmits an RRC connection request by adding its own ID (IMSI) to the RACH (S31), the reception ID determination of the BTS (first device) is performed. If the process determines that the ID (IMSI) included in the received RACH is not registered in the user recognition ID registration table 18, the BTS does not send an RRC connection request to the host device, Discard. In this way, the RRC connection setting sequence is performed.

  Thereby, in the first device, only when there is an RRC connection request from the MS registered in the user recognition ID registration table 16, it is transmitted to the host device, and an RRC connection request from an unregistered MS is not accepted. It is something that can be done.

Next, the processing configuration in the first apparatus will be described with reference to FIG. FIG. 6 is an explanatory diagram illustrating a processing configuration example of the first apparatus.
As shown in FIG. 6, in the first apparatus, when the radio unit 11 receives an RRC connection request by RACH from the MS, the modem unit 12 and the signal processing unit 13 perform demodulation processing and extract the received user identification ID from the RACH. To do. Then, the control unit 15 performs an ID comparison process between the extracted ID and the ID in the user recognition ID table 18, and selects RRC connection execution for the higher-level device only when they match, An RRC connection transmission instruction is output.

  According to the radio base station apparatus according to the first embodiment of the present invention, a user recognition ID registered in advance is registered in the user recognition ID table 18 of the storage unit 17, and the control unit 15 performs the RACH from the MS. Is used to determine whether the ID (IMSI) included in the RACH matches the ID stored in the user recognition ID registration table 18. Since the RRC connection request is transmitted to the host device and the RRC connection request is discarded if they do not match, the MS other than the registered user cannot use the radio base station device, for example, A user who installed a radio base station apparatus without using a radio base station apparatus with a small number of accommodation channels for home use or office use by another person's MS Zhan to be used, there is an effect that it is possible to improve the convenience of the user who placed the radio base station apparatus.

Next, a radio base station apparatus according to the second embodiment of the present invention is described.
In the first radio base station apparatus described above, only MSs registered in the user identification ID table accept RRC connection requests and no other MS accepts them at all. However, in the second radio base station apparatus, By providing a plurality of modes with different degrees of accepting other MSs and selecting an appropriate mode according to the user's usage frequency and usage status, the BTS can be used effectively.

The configuration of the radio base station apparatus (second apparatus) according to the second embodiment is substantially the same as that of the first radio base station apparatus shown in FIG. 1, and will be described using the same reference numerals. The processing in the control unit 15 is partially different.
The second device has three modes, a normal mode, an exclusive mode, and a priority mode, according to the difference in user recognition. When there is an RRC connection request, the control unit 15 sets the set mode. The processing is performed according to the following. Further, the second device is provided with a changeover switch for switching between the three modes.

Each mode in the second device will be described.
As in the conventional case, the normal mode is a mode in which RRC connection is performed without particularly distinguishing users if there is an available channel number. This mode is provided as a default mode at the time of factory shipment or initialization of the wireless base station device, although there is no particular advantage for the BTS side.

  The exclusive mode is the method described in the first device, and does not accept RRC connection requests other than the MS registered in advance. In the exclusive mode, by registering the MS of the user who installed the BTS in the BTS, the user who installed the BTS can use the BTS exclusively and does not allow the use of other MSs. .

  In addition, the priority mode is such that a registered MS can use the BTS preferentially, but accepts an RRC connection request even if the MS is not registered, only when the number of accommodated channels is sufficient. It is. Specifically, when the number of IDs registered in the user recognition ID table 18 is smaller than the maximum number of accommodated channels of the BTS, a channel corresponding to the difference obtained by subtracting the number of registered IDs from the maximum accommodated channel number Regarding the number, the RRC connection request is accepted in the normal mode.

  In the wireless communication system (second system) using the second device, the mobile terminal side also has a normal mode, an occupation mode, and a priority mode, and performs processing according to the mode setting. The MS of the second system is configured to be able to switch modes from the GUI or the like.

Next, the operation of the MS and the BTS in each mode in the wireless communication system using the second device will be specifically described.
First, a process when an RRC connection is requested in the normal mode will be described with reference to FIGS. FIG. 7 is a flowchart showing processing at the time of requesting an RRC connection on the MS side in the normal mode, and FIG. 8 is a flowchart showing a user recognition method of the BTS in the normal mode.

  As shown in FIG. 7, when the normal mode is set, the control unit of the MS transmits an RRC connection request without adding a BTS identification ID as in the conventional case (400), and ends the process. The normal mode on the MS side is used when there is no BTS to occupy nearby, such as when going out, and is used when wireless communication is performed by connecting any neighboring BTS.

Further, as shown in FIG. 8, the control unit 15 of the BTS determines whether or not the RACH has been received (420), and if the RACH is received, if there is an available channel, an RRC connection request is sent to the host device. (422) to finish the process.
The normal mode of the BTS does not distinguish between MSs registered / unregistered as in the conventional case, and performs an RRC connection if there is an available channel. For example, as described above, it is used as a factory default. Mode.

  Next, processing when an RRC connection is requested in the exclusive mode will be described with reference to FIGS. FIG. 9 is a flowchart showing processing at the time of an RRC connection request on the MS side in the exclusive mode, and FIG. 10 is a flowchart showing processing of the user recognition method of the BTS in the exclusive mode.

  When the occupation mode is set in the MS by GUI or the like, as shown in FIG. 9, the control unit of the MS adds a BTS identification ID to the RACH (300) and transmits an RRC connection request (302). The processing on the MS side is as follows.

When the occupation mode is set in the MS, the MS makes an RRC connection request with the BTS identification ID added, and performs communication only when a BTS with a matching BTS identification ID is found. No communication is performed. Therefore, even if a BTS (own BTS) with a matching BTS identification ID cannot be detected in a cell search and an adjacent cell BTS is detected, communication with the adjacent BTS is not performed.
Also, the MS in the occupation mode does not perform handover to the adjacent cell BTS.
Thereby, in the exclusive mode, the MS can reliably communicate with its own BTS and can be prohibited from communicating with other BTSs.

Next, processing on the BTS side will be described.
In addition, as shown in FIG. 10, when the exclusive mode is set in the BTS, in the BTS, the control unit 15 determines whether or not the RACH of the RRC connection request is received from the MS (320). In this case, the user identification ID (IMSI) is acquired from the RACH (322).

  Then, the control unit 15 determines whether or not the acquired user recognition ID is registered in the user recognition ID table 18 (324). An RRC connection is made with respect to (326).

  If the user recognition ID acquired from the RACH is not registered in the user recognition ID table 18 in the process 324, the control unit 15 discards the acquired information and ends the process.

  The BTS in the exclusive mode transmits a request to the host device only when there is an RRC connection request from the MS registered in the user recognition ID table 18, and does not transmit any other request. If the MS ID of a user who has authority to use is registered in the user recognition ID table 18, even if there is an RRC connection request from an MS not registered in the user recognition ID table 18, connection to the own BTS is prohibited. Only a user having the authority to use the BTS can use the BTS exclusively.

Next, the processing configuration at the time of RRC connection request in the priority mode, which is a characteristic part of the second device, will be described with reference to FIG. FIG. 11 is an explanatory diagram illustrating a processing configuration example in the priority mode of the second device.
As illustrated in FIG. 11, when the second device receives an RRC connection request by RACH from the MS in the priority mode, the second device performs demodulation processing and extracts the received user identification ID from the RACH.

  Then, an ID comparison process between the extracted ID and the ID in the user recognition ID table 18 is performed. If they match, the RRC connection execution is selected for the higher-level device.

  If the number does not match, the number of accommodated channels is checked. If the number of IDs registered in the user recognition ID table 18 is smaller than the maximum accommodated channel number, the available channels are within the difference. If there is, the RRC connection is executed. That is, in the priority mode, a channel for the registered MS is always secured, and if there is a remainder, the remaining channel can be connected in the normal mode. In this way, processing in the priority mode of the second device is configured.

Next, processing when an RRC connection is requested in the priority mode will be described with reference to FIGS. FIG. 12 is a flowchart showing processing at the time of an RRC connection request on the MS side in the priority mode, and FIG. 13 is a flowchart showing processing of a BTS user recognition method in the priority mode.
As shown in FIG. 12, when the priority mode is set for the MS by GUI or the like, the MS performs a cell search, and when the BTS is detected from the scrambling code (500), the BTS identification ID is assigned to the RACH. Is added (502), and an RRC connection request is made (504).

  If no BTS is detected in process 500, the MS makes an RRC connection request without adding a BTS identification ID, as in the normal mode (504). This is because when the own BTS cannot be detected, connection to the BTS of the adjacent cell is attempted.

As described above, when the priority mode is set in the MS, communication with the BTS that matches the BTS identification ID set in the initial setting is given priority, but when the BTS is not found, When the communication is interrupted, handover to the adjacent cell BTS is performed.
As a result, the MS can preferentially connect to its own BTS, and if it cannot connect to its own BTS, it can connect to other BTSs and perform stable communication. .

Next, processing on the BTS side will be described.
As shown in FIG. 13, when the priority mode is set in the BTS, the control unit 15 of the BTS determines whether or not the RACH is received (520). The user identification ID (IMSI) is read (522).

  Then, the control unit 15 determines whether or not the acquired user recognition ID is registered in the user recognition ID table 18 (524). If registered, the control unit 15 performs an RRC connection to the host device. (528).

  If the user identification ID acquired from the RACH is not registered in the user identification ID table 18 in the process 524, the number of registered user identification IDs may be less than the maximum number of accommodated channels in the priority mode. For example, the number of channels corresponding to the difference can be connected even if the MS is not registered in the user recognition ID table 18.

Therefore, the control unit 15 determines whether there is an empty accommodation channel (remaining accommodation channel) corresponding to the difference between the number of registered user identification IDs and the maximum accommodation channel number (526). If there is, the process proceeds to processing 528 to perform an RRC connection to the higher-level device.
For example, if the maximum number of accommodated channels is 4, one ID is registered in the user recognition ID table 18, and one other MS is already connected, the remaining accommodated channels have two spaces. , RRC connection can be requested.

Further, in the process 526, when there is no vacancy in the remaining accommodated channel, the control unit 15 discards the acquired information and ends the process.
In this way, BTS processing in the priority mode is performed.

  As a result, the BTS in the priority mode makes an RRC connection request to the host device if there is an RRC connection request from the MS registered in the user recognition ID table 18, and if there is an RRC connection request from an unregistered MS The remaining accommodated channels obtained by subtracting the number of IDs registered in the user identification ID table 18 from the maximum accommodated channel number can be connected in the normal mode, while ensuring the connection of the registered MSs. If there is a surplus in the number of accommodated channels, other MSs can be connected, and the BTS can be used effectively.

Next, another process of the call connection request of the MS for which the priority mode is set will be described with reference to FIG. FIG. 14 is a flowchart showing another process of the call connection request of the MS for which the priority mode is set.
Here, a case will be described in which the MS is set to the priority mode and the BTS is set to the exclusive mode, and the number of IDs registered in the user recognition ID table 18 of the BTS is larger than the maximum number of accommodated channels of the BTS.

  Another process is that if the MS makes an RRC connection request and is rejected by the BTS, it is temporarily received from another MS registered in the user recognition ID table 18 in addition to the reason that the ID is not registered. Access is concentrated and there is no room in the accommodated channel, so if it is rejected by the local BTS, it will be fixed to the local BTS before attempting to connect to another BTS. This is a process of retrying the number of times.

  As shown in FIG. 14, when a call connection request from the MS occurs, first, pre-processing is performed (600). Pre-processing includes cell search for a connected radio base station device, operation information of the cell broadcasted as a common channel in the cell, information such as scramble codes and frequencies of radio base station devices existing in the vicinity ( Broadcast information including peripheral cell information) is received.

Further, the MS initializes an internal timer value and counter value (counter N) as preparation for transmitting a call connection request (Connection Request) message. Further, the MS acquires constraint information for transmission of RACH, which is an uplink common channel applied to the cell, from the broadcast information described above. This restriction information is included in an information element (IE: Information Element) of broadcast information, and here, a timer value used for RACH retransmission and an allowable number of retransmissions defined by the system are acquired.
When the priority mode is set, the MS adds the BTS identification ID and transmits the RRC connection request for the call connection request using the RACH (602).

In the BTS, if the IMSI of the MS included in the RACH is registered in the user identification ID table 18 of the BTS and is a receivable terminal, and the accommodation channel is empty, a confirmation confirmation (Confirm) is transmitted from the BTS. To do.
Further, the BTS transmits an acceptance rejection (Reject) when the IMSI read from the RACH is not registered in the user recognition ID table 18.
In addition, even if the IMSI of the MS included in the RACH is registered in the user identification ID table 18 of the BTS, the BTS transmits an acceptance refusal if there is no available channel.

Here, if the IMSI read from the RACH is not registered in the user recognition ID table 18 or if there is no available channel, the BTS control unit generates a call acceptance rejection (Reject) message.
Normally, when call acceptance is permitted, a parameter for setting an individual channel is transmitted in the FACH message from the RNC, which is a higher-level device. However, the BTS according to the present embodiment rejects call acceptance. , A FACH message including Reject is generated instead of the FACH message from the RNC, and is transmitted as a downlink common channel signal. The MS confirms that the call acceptance is rejected by receiving the FACH message from the BTS.

  The MS receives an acceptance confirmation or acceptance refusal from the BTS (604). When the acceptance confirmation is received, the MS stops the timer (606), performs call connection processing (608), and ends the processing.

  In addition, when reception rejection is received in the process 604, the MS determines whether the counter N exceeds the allowable number of retransmissions acquired in the broadcast information (610). If it is possible, it is determined whether the time is up (620). If the time is up, the call connection request is retransmitted (622), the counter N is incremented (624), and the processing proceeds to step 604.

  If the counter N exceeds the allowable number of retransmissions acquired in the broadcast information in the process 610, the MS determines that retransmission is impossible and determines whether there is information on neighboring base stations in the IE included in the broadcast information. (612).

  If there is information on the neighboring base station, the MS establishes timing synchronization using the frequency information and the scrambling code, switches the acquisition cell (614), returns to the process 600, and returns to another BTS. Send a call connection request.

In the process 612, when there is no neighboring base station information in the broadcast information, the MS determines that there is no connectable base station, and temporarily receives the downlink common channel reception operation or the radio base station using the uplink common channel. The process shifts to an idle mode in which no access to the apparatus is performed (616), and the process ends.
In this way, another process is performed in the mobile terminal according to the embodiment of the present invention.

Next, display in the second device will be described.
In the second radio base station apparatus, the state is displayed on the display unit so that the use state can be confirmed. For example, the number of connected MSs and their IDs are displayed.
In addition, it is possible to display user registration, user recognition, setting OK / NG at the time of mode switching, or a log with an LED or the like.
Specifically, the control unit 15 displays the state by controlling the display unit 20 such as an LED in accordance with the state of the apparatus.

  Similarly, the mobile terminal in the radio communication system using the second device also displays the currently set mode (normal, exclusive, or priority) and whether or not the own BTS can be used. Each display can be displayed with a mark or an icon. Furthermore, a log at the time of user registration, user recognition, and mode switching may be displayed.

  According to the radio base station apparatus according to the second embodiment of the present invention, when there are three types of modes, the normal mode, the exclusive mode, and the priority mode, and there is an RRC connection request, the control unit 15 In the normal mode, an RRC connection request is made to the host device regardless of the requesting MS ID, and in the exclusive mode, the RRC connection request is made when the requesting MS ID is registered in the user recognition ID table 18. In the priority mode, the request source MS ID is registered in the user recognition ID table 18, and even if it is not registered, the maximum number of accommodated channels and the ID registered in the user recognition ID table 18 Since the RRC connection request is made when there is a vacancy in the remaining accommodated channel corresponding to the difference from the number, the user's use Situation by selectively using three modes can be set depending on, there is an effect that it is possible to improve convenience.

  In particular, in the priority mode, the accommodation channels corresponding to the number of registered MSs are always secured, and the remaining channels can be connected in the normal mode. Therefore, the user who installed the BTS should use the BTS preferentially. In addition, the convenience can be improved, and other MSs can be connected to the remaining channels, so that the BTS can be effectively used.

  In addition, according to the mobile terminal in the wireless communication system according to the embodiment of the present invention, when an RRC connection request is made and acceptance is rejected, a predetermined number of RRC connection requests are retried in advance. Therefore, when the MS makes an RRC connection request, even if all the accommodated channels are occupied by another MS already registered in the user identification ID table 18, the RRC connection request is retransmitted several times. There is an effect that the possibility of being able to connect to the BTS can be increased.

  Furthermore, in the BTS user recognition ID table 18, IDs are registered with priorities, and when an RRC connection request is received from an MS with a high priority, when there is no available channel, It is also possible to disconnect the connection with the MS having the lower priority order so as to accept the RRC connection request from the MS having the higher priority order, and there is an effect that the connection according to the priority order can be performed.

  Further, in the second apparatus, since the state of the apparatus such as the set mode and the number of connected MSs is displayed on the display unit 20, the operator can check the operation status of the apparatus, and the apparatus There is an effect that can be used for maintenance inspection.

  The present invention is suitable for a radio base station apparatus that can improve user convenience in a small-scale cell.

FIG. 3 is a configuration block diagram of a radio base station apparatus (first apparatus) in the radio communication system according to the first embodiment of the present invention. It is explanatory drawing which shows the outline | summary of operation | movement of the radio | wireless communications system using a 1st apparatus. It is a flowchart figure which shows the user registration method in the control part of MS of the radio | wireless communications system using a 1st apparatus. It is a flowchart figure which shows the user registration method in the control part 15 of a 1st radio base station apparatus. (A) is a sequence explanatory diagram when the MS ID is registered in the user recognition ID table 18, and (b) is a sequence explanatory diagram when the MS ID is not registered in the user recognition ID table 18. is there. It is explanatory drawing which shows the process structural example of a 1st apparatus. It is a flowchart figure which shows the process at the time of the RRC connection request | requirement by MS side in normal mode. It is a flowchart figure of the user recognition method of BTS in normal mode. It is a flowchart figure which shows the process at the time of the RRC connection request | requirement by MS side in an occupation mode. It is a flowchart figure which shows the process of the user recognition method of BTS in an occupation mode. It is explanatory drawing which shows the process structural example in the priority mode of a 2nd apparatus. It is a flowchart figure which shows the process at the time of the RRC connection request | requirement by MS side in priority mode. It is a flowchart figure which shows the process of the user recognition method of BTS in priority mode. It is a flowchart figure which shows another process of the call connection request | requirement of MS with which priority mode is set. It is a schematic explanatory drawing which shows the structure of a general radio | wireless communications system. It is explanatory drawing which shows a position registration sequence. It is explanatory drawing which shows the outline | summary of the RRC connection sequence in the conventional radio | wireless communications system. It is a schematic explanatory drawing which shows the trouble point in the conventional radio | wireless communications system.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Mobile terminal (MS), 2 ... Radio base station apparatus (BTS), 3 ... Radio control apparatus (RNC), 4 ... Mobile switch (MSC), 5 ... Home location register (HLR), 11 ... Radio | wireless part, 12 DESCRIPTION OF REFERENCE SIGNS ...... Modulation / demodulation unit 13 ... Signal processing unit 14 ... Transmission path interface unit 15 ... Control unit 16 ... Main memory 17 ... Storage unit 18 ... User recognition ID table 19 ... Interface unit 20 ... Display unit

Claims (1)

A radio base station apparatus of a radio communication system comprising a control unit that receives an RRC connection request from a mobile terminal and transmits the RRC connection request to an upper apparatus of the radio communication system,
A storage unit including a user recognition ID table that stores IDs of mobile terminals registered in advance is provided.
When the control unit receives an RRC connection request from a mobile terminal, the control unit determines whether or not the ID of the requesting mobile terminal included in the request is stored in the user recognition ID table. If the mobile terminal ID is not stored in the user identification ID table, the RRC connection request is transmitted to the host device. A radio base station apparatus, characterized by being a control unit that performs control so as not to occur.

Images