JP2006333385A - Radio control station and control method in radio control station - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio control station capable of coexisting two mobile communication systems existing in the same area.
Radio control stations 5 and 6 for setting control signal termination and various types of broadcast information for mobile stations 1 and 10 for each of two mobile communication systems existing in the same area. By referring to the subscriber information, the mobile stations 1 and 10 are selected at the time of standby among the radio base stations that can provide only the service of one system and the radio base stations that can provide the services of both systems. Control means for determining a radio base station to be selected and notifying the mobile stations 1 and 10 of the radio base station to be selected in the procedure at the end of communication.
[Selection] Figure 1

Description

  The present invention relates to a mobile station in the case where there are a radio base station capable of providing only one service and a radio base station capable of providing both services for each of two mobile communication systems existing in the same area. The present invention relates to a radio control station that performs one or both of terminating a control signal and setting various types of broadcast information, and a control method in the radio control station.

  In a DS-CDMA (Direct Spread Code Division Multiple Access) mobile communication system, an exchange station connected to another network is connected to a plurality of radio base stations (RNC), and each radio control station is connected to a plurality of radio base stations. Base stations (BTS) are controlled, and each radio base station manages a plurality of cells or a plurality of clusters. In each cell or cluster, various information such as information necessary for waiting for mobile stations in the area and information that becomes valid after connection is broadcast (see Non-Patent Document 1). These pieces of information are created by the radio control station and transmitted to the mobile station via the radio base station.

  As a mobile communication system as described above, Patent Document 1 transmits information on diversity handover and a reference signal (for example, a perch signal) from a plurality of base stations to a mobile station. The mobile station measures the reception quality (for example, reception power) of the reference signal, and the mobile station newly sets the reception quality of the reference signal of the base station and the service area of the base station for each of the plurality of base stations. Describes a mobile communication system that determines whether to make a candidate for a service area to start communication and / or whether to make a candidate for the base station.

In addition, the radio control station can determine a radio base station to be selected when the mobile station is on standby, and can notify the mobile station in a procedure at the end of communication (see Non-Patent Document 1).
JP 2002-185998 A 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Radio Resurce Control (RRC) protocol specification (Release 1999)

However, when there are a plurality of such mobile communication systems in the same area, there are radio base stations that can provide only the service of one system and radio base stations that can provide the services of both systems. When a station selects a radio base station that can provide only the service of one system as a radio base station to communicate when waiting, there is a risk that communication with the other system may fail.
The present invention has been made to solve the above-described problem, and an object of the present invention is to provide a radio control station capable of coexisting two mobile communication systems existing in the same area, and a control method in the radio control station. It is said.

  In order to solve the above problems, a radio control station according to the present invention performs termination of a control signal for a mobile station and setting of various types of broadcast information for each of two mobile communication systems existing in the same area. Of the radio base stations that can provide the services of both systems and the radio base stations that can provide the services of both systems by referring to the subscriber information related to the mobile station, the mobile station A control means for determining a radio base station to be selected at the time of standby and notifying the mobile base station of the radio base station to be selected in a procedure at the end of communication; and a radio base station capable of providing only the service of one system; The broadcast information transmitted by the radio base station that can provide only the service of one of the radio base stations that can provide the service of both systems, Further comprising a control means for controlling to select a radio base station to be selected as a communication object during dynamic station waiting characterized.

  Also, the control method in the radio control station of the present invention is a control method in the radio control station that terminates a control signal for the mobile station for each of two mobile communication systems existing in the same area. Of the radio base station that can provide only the service of one system and the services of both systems by referring to the user information, the radio base station that the mobile station should select when waiting And the mobile station is notified of the radio base station to be selected in the procedure at the end of communication.

  The broadcast information transmission method of the present invention is a broadcast information transmission method in a radio control station that sets various types of broadcast information for each of two mobile communication systems existing in the same area. The mobile station transmits broadcast information transmitted by a radio base station that can provide only the service of one of the radio base stations that can provide the service of both systems and the radio base station that can provide only the service of both systems. Control is performed such that a radio base station to be selected as a communication target at the time of standby is selected.

  According to these inventions, in each of the two mobile communication systems existing in the same area, in the radio control station that performs one or both of terminating the control signal for the mobile station and setting various types of broadcast information, By referring to the user information, the radio base station that can provide only the service of one system and the radio base station that the mobile station should select when waiting among the radio base stations that can provide both services can be selected. To the mobile station that cannot be designated from the radio control station as the radio base station to be selected at the time of standby in the procedure at the end of communication. For a radio base station that can provide only the services of one system and a radio base station that can provide both services, Broadcast information radio base station can provide only the arm of the service sends controls to select a radio base station to be selected as a communication object when the mobile station is waiting.

  Thus, the radio base station that the mobile station should select as the communication target at the time of standby is notified to the mobile station in the procedure at the end of communication, or the radio base station that the mobile station should select as the communication target at the time of standby By controlling so as to select a station, two systems existing in the same area can coexist.

Hereinafter, a radio control station and a broadcast information transmission method according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing an overall configuration of a radio communication system to which a radio base station according to an embodiment of the present invention is applied.
In FIG. 1, 1 and 10 are mobile stations, 2 to 4 are radio base stations, 5 and 6 are radio control stations, 7 and 8 are switching stations, 9 is a relay station, and 15 and 16 are extension transmission / reception servers. Nodes and relay stations are formed in the wireless communication system. Switching stations 7 and 8 connected to other networks are connected to a plurality of radio control stations 5 and 6, manage subscriber information, and notify the radio control stations 7 and 8. Each radio control station 5 and 6 manages a plurality of cells (or a plurality of clusters) 11 to 14.

In the present embodiment, there are two mobile communication systems existing in the same area. However, the exchanges 7 and 8, the radio control stations 5 and 6, and the radio base stations 3 and 4 in FIG. 1 support both of the two mobile communication systems.
Further, the mobile stations 1 and 10 located in the cells 11 to 14 support either one or both of the two systems. The radio base station 2 and the extension transmission / reception servers 15 and 16 support either one or the other. In the following description, the two mobile communication systems are referred to as system 1 and system 2, respectively, the system supported by the radio base station 2 is referred to as system 1, and the system supported by the extension transmission / reception servers 15 and 16 is referred to as system 2.

First, an information transmission path when communication is performed between the mobile station 1 and the mobile station 10 in the system 1 will be described.
When mobile station 1 is in cell 11 under radio base station 2 and mobile station 10 is in cell 14 under radio base station 4, switching stations 7 and 8 and radio control stations 5 and 6 In accordance with the control, a transmission path is set between the radio base station 2 and the radio base station 4 via the radio control station 5, the exchange station 7, the relay station 9, the exchange station 8, and the radio control station 6. Data exchanged between the mobile station 1 and the mobile station 10 is transferred using this transmission path. When the mobile station 1 is located in the cell 12 under the radio base station 3, the radio control station 5, the switching station 7, the relay station 9, and the exchange are exchanged between the radio base station 3 and the radio base station 4. A transmission path via the station 8 and the radio control station 6 is set, and data is transferred.

Next, an information transmission path when communication is performed between the mobile station 1 and the mobile station 10 in the system 2 will be described.
When the mobile station 1 is in the cell 12 under the radio base station 3 and the mobile station 10 is in the cell 14 under the radio base station 4, the switching stations 7 and 8 and the radio control stations 5 and 6 In accordance with the control, a transmission path via the extension transmission / reception server 15 and the extension transmission / reception server 16 is set between the radio base station 3 and the radio base station 4. Data exchanged between the mobile station 1 and the mobile station 10 is transferred using this transmission path. When the mobile station 1 is located in the cell 11 under the radio base station 2, communication using the system 2 cannot be performed.

  Next, how the mobile stations 1 and 10 are notified to the mobile stations 1 and 10 in the procedure at the end of communication will be described. The radio control stations 5 and 6 create control signals for the mobile stations 1 and 10, and the radio base stations 2 to 4 transmit the control signals created by the radio control stations 5 and 6 as instructed by the radio control stations 5 and 6. Send to. The mobile stations 1 and 10 start waiting in the cells 11 to 14 designated based on the received control information.

Furthermore, the manner in which broadcast information is generated or transmitted is described.
The radio control stations 5 and 6 create broadcast information for a plurality of mobile station types for each cell, and the radio base stations 2 to 4 indicate the broadcast information created by the radio control stations 5 and 6 by the radio control stations 5 and 6. Send as directed. The mobile stations 1 and 10 start waiting in a cell that is located based on the received broadcast information. In addition, when broadcast information cannot be received or when the corresponding cell indicates that the received cell does not stand by in the received broadcast information, the mobile stations 1 and 10 operate so as to receive broadcast information of other cells.

FIG. 2 is a block diagram showing the configuration of the radio control station according to the embodiment of the present invention.
As shown in this figure, the radio base stations 5 and 6 include a subscriber information acquisition unit 51 that acquires subscriber information from the exchanges 7 and 8, and a control signal generation unit that generates a control signal for the mobile station in communication. 52, a control signal transmission unit 53 that transmits the generated controlled control information to the radio base stations 5 and 6, a cell information setting unit 54 that sets information related to subordinate cells, and based on the set cell information. Are provided with a broadcast information creating section 55 for creating broadcast information for a plurality of mobile station types, and a broadcast information combining and transmitting section 56 for combining the created broadcast information and transmitting it to the radio base stations 5 and 6. .

Next, the processing operation of the radio control station will be described in detail with reference to FIG. 3 and FIG.
FIG. 3 is a flowchart showing a control signal creation process in the radio control station according to the embodiment of the present invention.
The control signal creation processing operation for the mobile stations 1 and 10 in the radio control stations 5 and 6 will be described with reference to FIG.
In step S31, the control signal creation unit 52 creates a control signal at the end of communication.
Next, in step S32, in the procedure at the end of communication, subscriber information is acquired from the exchanges 7 and 8 through the subscriber information acquisition unit 51, and information indicating whether the mobile station supports the system 2 is obtained. .

Next, when the mobile station supports the system 2 in step S33, information about the cell with which the mobile station is communicating is acquired by the cell information setting unit 54, and only the system 1 exists. The information is obtained as to whether the cell is a cell in which the system 1 and the system 2 coexist.
Further, in step S34, if the cell is a cell in which system 1 and system 2 coexist, whether the radio base station accommodating the target cell supports both system 1 and system 2 Information on whether to support only the system 1 is also acquired.

Next, in step S35, when the radio base station that accommodates the target cell supports only the system 1, the radio base station that supports both the system 1 and the system 2 is included in the control information for the mobile station. The mobile station is notified of the cell to be accommodated as a cell to be selected when the mobile station waits.
As a result, the mobile station that has received the control signal waits in a cell accommodated in a radio base station that supports both the system 1 and the system 2.
If only system 1 is supported in step 32, only system 2 is present in step S33, and if both system 1 and system 2 are supported in step S34, the control signal The radio base station to be selected at the time of standby is not set.

FIG. 4 is a flowchart showing broadcast information creation transmission processing operation in the radio base station according to the embodiment of the present invention.
First, in step S41, the broadcast information unit 55 separately creates broadcast information for a mobile station that can designate a standby cell and broadcast information for a mobile station that cannot be designated in a procedure at the end of communication.
Next, in step S42, it is determined whether the mobile station is capable of designating a standby cell or the mobile station is not capable of designating a standby cell in the calling / ending call / location registration procedure.

Next, in step S43, when creating broadcast information for a mobile station that cannot specify a standby cell, information about a cell to be broadcasted and transmitted is obtained from the cell information setting unit 54. Information is obtained as to whether only the system 1 exists or whether the system 1 and the system 2 coexist.
In step S44, the radio base station accommodating the target cell supports both the system and the system 2 when creating broadcast information about the cell in which the system 1 and the system 2 coexist. Also, information on whether the system 1 is supported only is acquired.

Next, in step S45, when the radio base station accommodating the target cell supports only the system 1, the broadcast information for the corresponding mobile station has not been created, or the cell cannot stand by. Set to notify.
As a result, the broadcast information transmitted by the cell 11 does not include broadcast information for a mobile station that cannot specify a standby cell in the procedure at the end of communication, or the broadcast information cannot be received by the cell. Is set. Therefore, the mobile station supports both the other system 1 and the system 2 because the broadcast information for the mobile station cannot be received or the broadcast information for the mobile station is set not to be able to wait. A standby is performed in a cell accommodated in the radio base station.

In step S41, if the mobile station can be designated for standby in the calling / end call / location registration procedure, if only system 1 exists in step S43, or both system 1 and system 2 are supported in step S44. If so, the corresponding broadcast information for the mobile station is created.
Thereby, according to the said embodiment, a mobile station waits in the cell designated with the control signal. Or, since it is only necessary to confirm the presence / absence of notification information for itself or the setting of whether or not to wait, it is possible to provide two mobile communication systems, which service the radio base station can provide, or both services It is possible to coexist without making the mobile station aware of whether it is possible.

  As described above, according to the present invention, the radio base station to be selected as the communication target at the time of standby is notified by the control signal for the mobile station according to the subscriber information, and the standby cell designation is performed in the procedure at the end of communication. For mobile stations that cannot be used, by controlling the broadcast information transmitted by the radio base station that can provide only the services of one system, the subordinates of the radio base stations that can provide the services of both systems are controlled. Since it is possible to perform standby operation in a cell, two mobile communication systems are connected to each other with respect to which system the radio base station can provide services of, or both systems. Can coexist without being conscious.

  In the embodiment described above, when executing the processing shown in the flowcharts of FIGS. 3 and 4, the case where the control program stored in advance in the ROM is executed has been described. However, the present invention is not limited to this. Instead, the program may be incorporated into a RAM and executed from a storage medium on which a program showing these procedures is recorded. Alternatively, the program may be acquired from a network.

Here, the storage medium is a semiconductor storage medium such as RAM or ROM, a magnetic storage type storage medium such as FD or HD, an optical reading type storage medium such as CD, CDV, LD, or DVD, or a magnetic storage type such as MO. / Optical reading type storage media, including any storage media that can be read by a computer regardless of electronic, magnetic, optical, or other reading methods.
As described above, the radio control station of the present invention has been described focusing on the embodiments, but the present invention is not limited to this, and various modifications can be made without departing from the spirit of the present invention. is there.

It is a block diagram which shows the whole structure of the radio | wireless communications system to which the radio control station which concerns on embodiment of this invention is applied. It is a block diagram which shows the structure of the radio | wireless control station which concerns on embodiment of this invention. It is a flowchart which shows the control signal transmission process with respect to the mobile station in a radio control station. It is a flowchart which shows the alerting | reporting information preparation transmission process in a wireless base station.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,10 ... Mobile station, 2-4 ... Wireless base station, 5,6 ... Radio control station, 7,8 ... Switching station, 9 ... Relay station, 11-14 ... Cell, 15,16 ... Extension transmission / reception server, 51 ... subscriber information acquisition unit, 52 ... control signal creation unit, 53 ... control signal transmission unit, 54 ... cell information setting unit, 55 ... broadcast information creation unit, 56 ... broadcast information synthesis transmission unit

Claims (5)

For each of two mobile communication systems existing in the same area, a radio control station that terminates a control signal for the mobile station,
By referring to the subscriber information related to the mobile station, the mobile station selects between the radio base station that can provide the service of only one system and the radio base station that can provide the service of both systems. A radio base station comprising control means for determining a radio base station to be selected and notifying the mobile station of the radio base station to be selected in a procedure at the end of communication. A radio base station that sets various types of broadcast information for each of two mobile communication systems existing in the same area,
A notification transmitted by a radio base station that can provide only the service of one system, and a radio base station that can provide only the service of one of the radio base stations that can provide the service of both systems. A radio base station comprising control means for controlling information so that a mobile station selects a radio base station to be selected as a communication target at the time of standby.   3. The radio according to claim 2, wherein the control means controls the radio base station not to transmit broadcast information to a mobile station that cannot designate a radio base station to be selected as a communication target at the time of standby. base station.   3. The radio base station according to claim 2, wherein the control means sets contents for designating a radio base station to be selected as a communication target when the mobile station is on standby in broadcast information for the mobile station. A control method in a radio control station for terminating a control signal for a mobile station for each of two mobile communication systems existing in the same area,
By referring to the subscriber information related to the mobile station, the mobile station selects between the radio base station that can provide the service of only one system and the radio base station that can provide the service of both systems. A control method in a radio control station that determines a radio base station to be selected and notifies a mobile station of the radio base station to be selected in a procedure at the end of communication.

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