JP2641411B2 - Mobile communication system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system, and more particularly to a frame structure of a base station interface, a connection configuration system between a base station and a base station controller, and a radio signal transmission between a base station and a base station controller. Concerning concealment processing.

[0002]

2. Description of the Related Art A conventional mobile communication system will be described with reference to the drawings.

FIG. 1 shows a basic configuration of a mobile communication system. FIG. 1A shows a case without a base station interface converter, and FIG. 1B shows a case with a base station interface converter. .

In FIG. 1, the mobile communication system includes a mobile station 100, a base station 200, a base station controller 300, and a base station interface converter 400. The base station controller 300 is connected to a communication network via an exchange. The mobile station 100 and the base station 200 are connected via a wireless interface, and the base station 200 and the base station controller 300 are connected via a base station interface. As shown in FIG. 1B, the base station interface conversion device 400 may be provided on the base station interface between the base station 200 and the base station control device 300.

[0005] The mobile station 100 has means for terminating the lower layer signal and the higher layer signal of the radio interface, and the base station 200 terminates the lower layer signal of the radio interface and the base station interface and transmits the higher layer signal transparently. The base station controller 300 includes a first transmission unit, the base station controller 300 includes a terminating unit that terminates the lower layer signal and the higher layer signal of the base station interface, and the base station interface converter 400 converts the lower layer signal of the base station interface. There is a second transmission means that terminates and transparently transmits the higher-layer signal. The mobile station 100 communicates with the base station 200 and the base station controller 300 via the wireless interface and the base station interface to perform communication connection control, thereby concealing user information from the mobile station user on the wireless interface. Communication means for providing a service for performing communication by communication.

FIG. 2 shows the configuration of the base station interface shown in FIG. 1, (a) shows a case where three DSL lines are used, (b) shows a case where an HDSL line is used, (c) () Is a diagram showing a case where a DS1 line is used.

Next, the configuration of the base station interface will be described. In FIG. 2A, the base station interface configuration when a DSL line is used is configured by using three digital transmission lines (DSL lines) each having a data transmission capacity of 144 kbit / s. . The DSL line base station 210 and the DSL line base station controller 310 are connected by a base station interface using a DSL line.

In FIG. 2B, when a HDSL line is used, the base station interface configuration is such that the base station interface uses one digital transmission line (HDSL line) having a data transmission capacity of 776 kbit / s. Be composed. HDSL line base station 220 and H
The DSL line base station controller 320 is connected by a base station interface using an HDSL line.

In FIG. 2C, when the DS1 line is used, the base station interface configuration is such that the base station interface has one digital transmission line (DS1 line) having a data transmission capacity of 1.544 Mbit / s. Used and configured. DS1 line base station 230 and D
The S1 line base station controller 330 is connected by a base station interface using a DS1 line.

FIG. 11 shows each internal configuration of a base station and a base station controller in a conventional mobile communication system.
Is a diagram showing a case in which three DSL lines are used, (b) is a diagram showing a case in which an HDSL line is used, and (c) is a diagram showing DS1
It is a figure showing the case where a line is used.

Next, the respective internal configurations of a conventional base station and a base station controller will be described.

In FIG. 11A, the transmission information concealment processing unit 311 of the DSL line base station control device 310a uses a radio frame number and other concealment control information (a concealment key or the like) for user information and control information. Perform concealment processing. The transmission frame control unit 313 edits the concealed user information and control information together with the radio frame number into a format of the frame configuration of the base station interface for the DSL line,
The DSL line base station interface transmission unit 315 transmits the transmission information to the DSL line as transmission information.

The DSL line base station interface receiving section 211 of the DSL line base station 210a receives transmission information from the DSL line, and the transmission frame control section 213 outputs
The transmission information of the DSL line interface for the line is integrated, edited into a wireless interface frame configuration, and transmitted to the wireless interface. DSL line base station 2
The wireless interface receiving unit 216 of 10a receives the information received from the wireless interface via the antenna 500 and the coupler 218, and the reception frame control unit 214 edits the frame configuration of the wireless interface and outputs the DSL line interface for three lines. Decompose into received information, D
The SL line base station interface transmitting section 212 transmits the received information to the DSL line.

D of the DSL line base station controller 310a
The base station interface receiving section 316 for the SL line is DS
The reception frame control unit 3 receives the reception information from the L line
14 separates the concealed user information and control information from the format of the frame configuration of the base station interface for the DSL line, and the reception information concealment control unit 312 sets the radio frame number of the reception frame to the radio frequency of the transmission frame transmitted immediately before. Assuming that it corresponds to the frame number, concealment release processing is performed on the user information and control information using the wireless frame number and other concealment control information (such as a concealment key).

Here, in FIG. 1, a time relationship between transmission information and reception information on the radio interface is defined, and mobile station 100 transmits to base station 200 a fixed time after receiving information from base station 200. Send information to That is, the base station 200 receives information from the mobile station 100 a fixed time after transmitting the information to the mobile station 100. It is necessary to assign the same wireless frame number to the pair of transmission information and reception information.

In this conventional example, the base station controller 300a assigns the radio frame number assigned to the transmission information to the reception information assumed to correspond to the transmission information by the base station controller 300a. The time difference between the time when the base station controller 300a receives the reception information and the time when the transmission information is transmitted also depends on the line delay time of the base station interface. Is not always possible.

FIG. 11B shows a conventional HDSL.
The description of the configurations of the line base station 220a and the HDSL line base station controller 320a is the same as that for the DSL line in FIG.

FIG. 11C shows a conventional DS.
The description of the configurations of the one-line base station 230a and the DS1 line base station controller 330a is also the same as that for the DSL line in FIG.

FIG. 12 shows the conventional DS shown in FIG.
FIG. 3 is a diagram illustrating a configuration of a base station interface using an L line.

Next, the frame structure of the base station interface using the DSL line of the prior art is shown in FIG.
This will be described with reference to FIG.

Base station 210a and base station controller 310a
Are connected by three DSL lines, the frame structure of each DSL line is basically one frame consisting of 18 bits, 20 frames are one multi-frame, and the first bit is the base station 210a and the base station 210a. The frame synchronization bit (SW) between the station controllers 310a is set to the 18th bit from the second bit of the first frame to the 10th frame, and the 17th bit from the second bit of the 11th frame to the 20th frame.
The bit is assigned to the payload (P
L), and the 18th bit of the 11th to 20th frames is a maintenance bit (EOC) between the base station 210a and the base station controller 310a.

The payload (P
L) is composed of user information and control information. The radio frame number (RFN) is transmitted from the base station controller 310a to the base station 2
It is transmitted as part of the control information data on the base station interface in the direction of 10a, but is not transmitted as data on the base station interface in the direction of the base station controller 310a from the base station 210a.

FIG. 13 shows the conventional HDS shown in FIG.
FIG. 3 is a diagram illustrating a frame configuration of a base station interface using an L line.

Next, a frame configuration of a base station interface using a conventional HDSL line will be described with reference to FIG. 11B and FIG.

Base station 220a and base station controller 320a
Is connected by one HDSL line, the frame structure of the HDSL line is basically one frame consisting of 97 bits, 20 frames are one multiframe, and the first bit is a frame synchronization bit (F) of the HDSL line. ,
The second bit is used for the base station 220a and the base station controller 320a.
The third to tenth bits are used as the frame synchronization bit (SW) between the base station 220a and the base station controller 320.
a for the frame maintenance bit (EOC) between bits a and 11 and the 13th to 13th bits are reserved bits (RES).
The 4th to 97th bits are the payload (PL) on the wireless interface.

The payload (P
L) is composed of user information and control information. The radio frame number (RFN) is transmitted from the base station controller 320a to the base station 2
It is transmitted as part of the data of the control information on the base station interface in the direction of 20a, but not transmitted on the base station interface in the direction of the base station 220a from the base station 220a.

FIG. 14 shows the conventional DS shown in FIG.
FIG. 3 is a diagram illustrating a frame configuration of a base station interface using one line.

Next, the frame configuration of the conventional base station interface using the first round of DS will be described with reference to FIGS.

Base station 230a and base station controller 330a
Is connected by one DS1 line, the frame structure of the DS1 line is basically one frame consisting of 193 bits, 20 frames are one multiframe, and the first bit is the frame synchronization bit (F) of the DS1 line. The second bit is a frame synchronization bit (SW) between the base 230a and the base station controller 330a, and the third to tenth bits are a frame maintenance bit (EOC) between the base station 230a and the base station controller 330a. , The 11th to 13th bits are reserved bits (RES), the 14th to 97th bits are payload (PL) on the radio interface, and the 98th bit is a frame between the base station 230a and the base station controller 330a. Sync bit (S
W), and the 99th bit to the 106th bit are the base station 2
A bit is used as a frame maintenance bit (EOC) between 30a and the base station controller 330a, a 107th bit to a 109th bit are reserved bits (RES), and a 110th bit is set to 1 bit.
The 93rd bit is a payload (PL) on the wireless interface.

The payload (P
L) is composed of user information and control information. The radio frame number (RFN) is transmitted from the base station controller 330a to the base station 2
It is transmitted as part of the control information data on the base station interface in the direction of 30a, but is not transmitted as data on the base station interface in the direction of the base station controller 330a from the base station 230a.

FIG. 15 shows the configuration of a conventional base station interface converter, and FIG. 15A shows the conventional DS shown in FIG.
FIG. 13B is a diagram showing conversion between the base station interface using the L line and the base station interface using the HDSL line shown in FIG. 13, and FIG. 13B shows the base station interface using the HDSL line shown in FIG. 13 and the DS1 shown in FIG. FIG. 14C is a diagram showing conversion between a base station interface using a line and FIG. 14C is a diagram showing conversion between a base station interface using a DS1 line shown in FIG. 14 and a base station interface using a DSL line shown in FIG. is there.

In FIG. 15A, the HDSL line base station controller 320a is connected to the HDSL / DSL conversion base station interface converter 410a by the HDSL line base station interface. HDSL / DSL
The conversion base station interface conversion device 410a is HDS
The L-line base station interface is converted into two sets of DSL line base station interfaces, and connected to the two DSL line base stations 210a.

In FIG. 15B, the DS1 line base station controller 330a is connected to the DS1 / HDSL conversion base station interface converter 420a via the DS1 line base station interface. The DS1 / HDSL conversion base station interface converter 420a converts the DS1 line base station interface into two sets of HDSL line base station interfaces, and connects to the two HDSL line base stations 220a.

In FIG. 15C, the DS1 line base station controller 330a is connected to the DS1 / DSL conversion base station interface converter 430a through the DS1 line base station interface. The DS1 / DSL conversion base station interface conversion device 430a converts the DS1 line base station interface into four sets of DSL line base station interfaces, and converts the four DSL line base stations 21 into four sets.
0a.

There are the following prior art documents.

Japanese notation: Bellcore Technical Reference TR-INS-001313, 1st edition, January 1993
May “Wireless Access Communication System (WACS) 0.1
Comprehensive Standard for Editions "Bellcore TECHNICAL R
EFERNCE TR-INS-001313 Iss
ue 1, October 1993 "Generic
Criteria for Version 0.1
Wireless Access Communic
ation Systems (WACS) "The relationship between the figure in the section of the related art and the figure of the related art is shown below. The figure number in the section of the related art and the figure in the related art are shown below. FIG. 1 FIG. 5.0-1 FIG. 2 FIG. 5.3-1 FIG. 2 FIG. 5.3-7 FIG. 12 FIG. 5.3-12 FIG. 13 FIG. 5.3-6 FIG. 14 FIG. 5.3-6 FIG. 15 Figure 5.4-1

In this conventional mobile communication system, the base station interface between the base station and the base station controller is composed of digital transmission lines having different transmission capacities, that is, DSL lines, HDSL lines, and DS1 lines. When used and configured, since the frame configuration of the base station interface corresponding to each digital transmission line was not made in consideration of unity, each interface in the base station controlling the base station interface and the base station control device was used. That it is necessary to perform a specific control for each interface, and to perform a specific control for each interface in a base station interface conversion device that converts a certain base station interface to another base station interface. was there.

In this conventional mobile communication system,
In order for the mobile station and the base station controller to perform concealment processing on user information and control information on the radio interface using the radio frame number, the base station controller transmits the radio frame number to the base station. Is transmitted as data on the base station interface in the direction from the base station to the base station, but the base station sends the radio frame number to the base station controller as data on the base station interface in the direction from the base station to the base station controller. Since transmission is not performed, if there is a difference in transmission delay between a plurality of transmission lines constituting the base station interface between the base station and the base station controller, the radio frame number (base station) transmitted from the base station controller to the base station Radio frame number from the station to the mobile station) and the radio frame that the base station controller assumes to correspond to that radio frame number And it may not match, there is a problem that there are cases where the security process in the base station controller is not performed correctly (radio frame number in the direction of the base station from the mobile station) No..

[0038]

A mobile communication system according to the present invention has a radio interface between a mobile station and a base station, has a base station interface between the base station and a base station controller, and The control device is connected to a communication network via a switching center, the mobile station has first terminating means for terminating a lower layer signal and a higher layer signal of the radio interface, and the base station is connected to the radio interface and the radio interface. Transmission means for terminating a lower layer signal of a base station interface and transparently transmitting the higher layer signal, wherein the base station control device terminates the lower layer signal and the higher layer signal of the base station interface in a second terminal Means, the mobile station communicates with the base station and the base station controller via the radio interface and the base station interface By performing signal connection control,
In a mobile communication system for providing a service for concealing user information on the wireless interface to a user of the mobile station, the base station interface has a digital transmission line (hereinafter referred to as DSL) having a data transmission capacity of 144 kbit / s. In the case where the radio interface and the base station interface are of a time division multiple access system, each of the three DSL lines has one D line.
The frame configuration of the SL line is based on one frame consisting of 18 bits, 20 frames are one multiframe, one bit is a frame synchronization bit between the base station and the base station controller, and the second bit is the base station. There is provided a first communication unit for communicating between user information and control information, which are bits for maintenance between a station and the base station controller and whose third to eighteenth bits are data on the wireless interface.

A mobile communication system according to the present invention has a radio interface between a mobile station and a base station, has a base station interface between the base station and a base station controller, and the base station controller has a switching station. Connected to a communication network, the mobile station has first terminating means for terminating a lower-layer signal and a higher-layer signal of the radio interface, and the base station is connected to a lower layer of the radio interface and the base station interface. The base station controller has a second terminating means for terminating a lower layer signal and a higher layer signal of the base station interface, the transmission means terminating a signal and transmitting the higher layer signal transparently. The mobile station communicates with the base station and the base station controller via the radio interface and the base station interface to perform communication connection control. Accordingly, in a mobile communication system that provides a service for confidentially communicating user information on the wireless interface to a user of the mobile station, a base station interface has a digital transmission line (hereinafter, referred to as a 768 kbit / s). , HDS
L), and when the radio interface and the base station interface are of a time division multiple access system, the frame configuration of the HDSL line is based on one frame consisting of 97 bits, 20 frames are defined as one multi-frame, the first bit is a frame synchronization bit of the HDSL line, the second bit is a frame synchronization bit between the base station and the base station controller, and the third bit is the base station and the base station. A maintenance bit between base station controllers is used, and the 4th to 45th bits are data on the wireless interface.
The 50th to 49th bits are used as control and maintenance bits for a base station interface converter installed to convert the base station interface from the HDSL line to another line on the HDSL line. Is the frame synchronization bit between the base station and the base station controller, the 51st bit is a maintenance bit between the base station and the base station controller, and the 52nd bit is 93 bits.
The bit is data on the wireless interface,
A user who sets the 94th bit to the 97th bit as control and maintenance bits of the base station interface converter installed for converting the base station interface from the HDSL line to another line on the HDSL line. There is provided second communication means for performing communication between the information and the control information.

The mobile communication system of the present invention has a radio interface between a mobile station and a base station, has a base station interface between the base station and a base station controller, and the base station controller has a switching center. Connected to a communication network, the mobile station has first terminating means for terminating a lower-layer signal and a higher-layer signal of the radio interface, and the base station is connected to a lower layer of the radio interface and the base station interface. The base station controller has a second terminating means for terminating a lower layer signal and a higher layer signal of the base station interface, the transmission means terminating a signal and transmitting the higher layer signal transparently. A mobile station communicates with the base station and the base station controller via the radio interface and the base station interface to perform communication connection control. By, in a mobile communication system providing a service to communicate with concealing the user information over the wireless interface to a user of said mobile station, said base station interface 1.544Mb
a single digital transmission line (hereinafter referred to as DS1 line) having a data transmission capacity of it / s, and when the radio interface and the base station interface are of a time division multiple access system, the DS1 The frame configuration of the line is based on one frame consisting of 193 bits, 20 frames are one multi-frame, the first bit is the frame synchronization bit of the DS1 line, and the second bit is the base station and the base station controller. A third bit is a maintenance bit between the base station and the base station controller, a fourth bit to a 45th bit is data on the wireless interface, and a 46th bit to a 49th bit. Is the DS
The control and maintenance bits of a base station interface converter installed for converting the base station interface from the DS1 line to another line on one line, and the 50th bit is the base station and the base station. The 51st bit is a maintenance bit between the base station and the base station control device, the 52nd to 93rd bits are data on the wireless interface, and the 94th to 97th bits are the frame synchronization bits between the control devices. The bit is the DS
The 98th bit is used as a control and maintenance bit for the base station interface converter installed to convert the base station interface from the DS1 line to another line on one line. The 99th bit is a maintenance bit between the base station and the base station controller.
Bits 0 to 141 are provided as data on the wireless interface, and bits 142 to 145 are provided for converting the base station interface from the DS1 line to another line on the DS1 line. The 146th bit is a frame synchronization bit between the base station and the base station controller.
A bit is a maintenance bit between the base station and the base station controller, a 148th bit to a 189th bit is data on the wireless interface, and a 190th bit to a 193th bit are the DS1 bits on the DS1 line. A third communication means for communicating user information and control information as control and maintenance bits of the base station interface converter installed for converting the base station interface from a line to another line; ing.

In the mobile communication system of the present invention, the base station has the base station interface configured using the three DSL lines, and there are two base stations.
When the base station control device has the base station interface configured using one HDSL line, the base station interface on the base station side by the DSL line for two base stations One line of HD
There is provided first conversion means for mutually converting the base station interface on the side of the base station controller by the SL line.

In the mobile communication system of the present invention, the base station has the base station interface configured by using one HDSL line, and there are two base stations, and the base station control device is When the base station interface is configured using one DS1 line, the base station interface on the base station side and one DS1 line by the HDSL line for two base stations Second conversion means for mutually converting the base station interface on the side of the base station controller with the base station controller.

In the mobile communication system of the present invention, the base station has the base station interface configured using the three DSL lines, and there are four base stations,
When the base station controller has the base station interface configured by using one DS1 line, the base station interface on the base station side by the DSL lines for four base stations DS1 of one line
There is provided third conversion means for mutually converting the base station interface on the base station control device side by a line.

[0044] In the mobile communication system of the present invention, the radio interface is a time division multiple access system, and the mobile station and the base station controller use radio frame numbers to transmit user information and control information on the radio interface. Performing a concealment process on the information, the base station controller transmits the radio frame number to the base station as data on the radio interface from the base station controller to the mobile station, Does not transmit the radio frame number to the base station as data on the radio interface in the direction from the mobile station to the base station, so that the base station transmits the radio frame number to the base station controller. Frame number as data on the base station interface from the base station to the base station controller When not transmitting, the base station transmits the radio frame number transmitted by the base station to the mobile station as data on the radio interface in the direction from the base station to the mobile station, corresponding to a transmission frame. The base station in the direction from the base station to the base station control device by adding the radio frame number to the data on the radio interface received from the mobile station as a reception frame received after a predetermined period of time. Transmitting means for transmitting as data on an interface, the base station control device having means for receiving as data on the base station interface, the base station control device transmits a radio frame number on the base station interface Receiving, and using the wireless frame number, user information and control on the wireless interface. And a processing means for performing concealment processing for the information.

[0045]

Next, the present invention will be described with reference to the drawings.

FIG. 1 shows the basic configuration of a mobile communication system, (a) shows a case without a base station interface converter, (b) shows a case with a base station interface converter, and FIG. FIG. 2 shows a basic configuration of a base station interface of the mobile communication system shown in FIG.
Is a diagram showing a case in which three DSL lines are used, (b) is a diagram showing a case in which an HDSL line is used, and (c) is a diagram showing DS1
It is a figure showing the case where a line is used.

In FIG. 1, the basic configuration of the mobile communication system includes a mobile station 100, a base station 200, a base station controller 300 and a base station interface converter 400. In FIG. 2, the configuration of the base station interface includes a DSL line, an HDSL line, and a D line.
There is an S1 line.

The detailed description of FIGS. 1 and 2 will be omitted because it has been described in the section of the prior art.

FIGS. 3A and 3B show the internal configurations of the base station and the base controller in the embodiment of the present invention. FIG. 3A shows the internal configuration when three DSL lines are used, and FIG. 3B shows the HDSL. Diagram showing each internal configuration when using a line,
(C) is a diagram showing each internal configuration when a DS1 line is used.

In FIG. 3A, the transmission information concealment processing unit 311 of the DSL line base station controller 310 conceals user information and control information by using a radio frame number and other concealment control information (such as a concealment key). Perform processing. The transmission frame control unit 313 edits the concealed user information and control information together with the radio frame number into the format of the frame configuration of the base station interface for the DSL line,
The line base station interface transmission unit 315 transmits the transmission information to the DSL line as transmission information.

The DSL line base station interface receiving section 211 of the DSL line base station 210 receives the transmission information from the DSL line, and the transmission frame control section 213 reads out the radio frame number from the transmission information and outputs the radio frame number adding section. 217, and integrates the transmission information of the DSL line interface for three lines to edit the frame structure of the wireless interface,
5 transmits the transmission information to the wireless interface via the coupler 218 and the antenna 500.

Radio interface receiving section 216 of DSL line base station 210 receives information received from the radio interface via antenna 500 and coupler 218,
The wireless frame number adding unit 217 reads out the stored wireless frame number from the transmission information when transmitting to the wireless interface, and sends the wireless frame number to the reception frame control unit 214. The reception frame control unit 214 edits the frame configuration of the wireless interface to 3 The radio frame number adding section 217 decomposes the received information into the DSL line interface reception information for the line.
The wireless frame number sent from the
The DSL line base station interface transmitting section 212 transmits the received information to the DSL line as reception information.

Here, in FIG. 1, the temporal relationship between the transmission information and the reception information on the radio interface is defined, and mobile station 100 transmits to base station 200 a fixed time after receiving the information from base station 200. To send information.
That is, the base station 200 receives information from the mobile station 100 a fixed time after transmitting the information to the mobile station 100.
The same wireless frame number is assigned to the pair of transmission information and reception information. In this embodiment, the base station 200 assigns the wireless frame number assigned to the transmission information to the reception information corresponding to the transmission information. This allows
Do not depend on the line delay time of the base station interface,
The same wireless frame number can be assigned to a pair of transmission information and reception information.

DS of base station controller 310 for DSL line
L-line base station interface receiving section 316 is DSL
The receiving frame control unit 31 receives the information received from the line.
4 separates the concealed user information and control information from the format of the frame configuration of the base station interface for the DSL line, and the frame number extraction unit 317 extracts the radio frame number from the reception information to obtain the reception information concealment control unit 31
2 and the received information concealment control unit 312 performs concealment release processing on the user information and control information based on the wireless frame number transmitted from the frame number extraction unit 317 and other concealment control information (such as a confidential key).

Next, in FIG. 3 (b), the HDSL line base station 220 and the HDSL line base station controller 32
The description of the configuration of 0 is the same as that for the DSL line shown in FIG.

In FIG. 3C, the description of the configuration of the DS1 line base station 230 and the DS1 line base station controller 330 is the same as that of the case of the DSL line shown in FIG. 3A. Yes, omitted.

FIG. 4 is a diagram showing a frame configuration of a base station interface using a DSL line in the present embodiment shown in FIG. 3A.

In FIG. 3A and FIG. 4, the base station 21
0 and the base station controller 310 are connected by three DSL lines, the frame structure of one DSL line is based on one frame consisting of 18 bits.
The zero frame is one multi-frame, the first bit is a frame synchronization bit (SW) between the base station 210 and the base station controller 310, and the second bit is a maintenance bit between the base station 210 and the base station controller 310 ( EOC), and the 3rd to 18th bits are a payload (PL) on the wireless interface.

FIG. 7 shows a payload format of a base station interface using a DSL line. FIG. 7A shows a payload format in the direction from the base control device to the base station. FIG. 7 is a diagram showing a payload format in the direction of.

FIG. 7A shows a payload (PL) format of a base station interface using a DSL line according to the present embodiment.
The payload (PL) format in the direction of 10 consists of a synchronization code (SYC), a low speed channel (SC), a high speed channel (FC), and a mobile station power control bit (PCC). The radio frame number is allocated in a synchronization code (SYC).

In FIG. 7B, the payload (PL) format in the direction from the base station 210 to the base station controller 310 is a radio link measurement bit (Radio Lin).
kMeasurements), slow channel (S
C), the fast channel (FC), and the radio frame number (RFN) assigned in the present invention. The radio frame number (RFN) is transmitted from the base station controller 310 to the base station 2
10 is transmitted as part of the control information data on the base station interface in the direction of 10, and is added and transmitted by the base station 210 as data on the base station interface in the direction from the base station 210 to the base station controller 210. You.

FIG. 5 is a diagram showing a frame configuration of a base station interface using an HDSL line in the present embodiment shown in FIG. 3B.

In FIG. 3B and FIG. 5, the base station 2
When 20 and the base station controller 320 are connected by one HDSL line, the frame configuration of the HDSL line is based on one frame consisting of 97 bits, and 20 frames are one frame.
The first bit is a frame synchronization bit (F) of the HDSL line, and the second bit is the base station 220.
Frame synchronization bit (S
W), the third bit is a maintenance bit (EOC) between the base station 220 and the base station controller 320, the fourth to 45th bits are a payload (PL) on the wireless interface, and the 46th bit is HDS for 49th bit
The control and maintenance bits (C) of the base station interface converter installed to convert the base station interface from the HDSL line to another line on the L line, and the 50th bit is the base station 220 and the base station. Control device 32
0 is a frame synchronization bit (SW), the 51st bit is a maintenance bit (EOC) between the base station 220 and the base station controller 320, and the 52nd to 93rd bits are a payload (PL) on the wireless interface. And 94
The 97th bit to the 97th bit are HDSL on the HDSL line
Control and maintenance bits (C) of a base station interface converter installed to convert a base station interface from a line to another line.

FIG. 8 shows a payload (PL) format of a base station interface using an HDSL line or a DSI line in this embodiment, and FIG. 8A shows a payload format from a base station control device to a base station. (B) is a diagram showing a payload format from the base station to the base station control device.

In FIG. 8A, the base station controller 3
The payload (PL) format in the direction from the base station 220 to the base station 220 includes a synchronization code (SYC), a low-speed channel (S
C), Fast Channel (FC), Mobile Station Power Control Bit (PCC). The radio frame number is allocated in a synchronization code (SYC).

In FIG. 8B, the payload (PL) format in the direction from the base station 220 to the base station controller 320 is a radio link measurement bit (Radio Lin).
kMeasurements), slow channel (S
C), the fast channel (FC), and the radio frame number (RFN) assigned in the present invention. The radio frame number (RFN) is transmitted from the base station controller 320 to the base station 2
20 is transmitted as part of control information data on the base station interface in the direction of 20, and as data on the base station interface in the direction from the base station 220 to the base station controller 320 is added by the base station 220 and transmitted. Is done.

FIG. 6 is a diagram showing a frame configuration of a base station interface using a DS1 line in the present embodiment shown in FIG. 3C.

In FIG. 3C and FIG. 6, the base station 23
When the base station controller 330 and the base station controller 330 are connected by one DS1 line, the frame configuration of the DS1 line is basically one frame consisting of 193 bits, 20 frames are one multiframe, and the first bit is the DS1 line. The frame synchronization bit (F), the second bit is the frame synchronization bit (SW) between the base station 230 and the base station controller 330, and the third bit is the base station 230 and the base station controller 330.
45 bits from the fourth bit as the maintenance bit (EOC) between
The bit is assigned to the payload (P
L), and the 46th to 49th bits are control and maintenance bits (C) of the base station interface converter installed to convert the base station interface from the DS1 line to another line on the DS1 line. And 50
The bit is a frame synchronization bit (SW) between the base station 230 and the base station controller 330, and the 51st bit is a maintenance bit (EO) between the base station 230 and the base station controller 330.
C), the 52nd to 93rd bits are used as the payload (PL) on the wireless interface, and the 94th to 97th bits are used to convert the base station interface from the DS1 line to another line on the DS1 line. The 98th bit is a frame synchronization bit (SW) between the base station 230 and the base station controller 330 as a control and maintenance bit (C) of the installed base station interface converter.
And the 99th bit is the base station 230 and the base station controller 3
30 bits for maintenance (EOC) between 30 bits, 100th to 141th bits as payload (PL) on the radio interface, and 142nd to 145th bits on DS1 line from DS1 line to another line. The control and maintenance bits (C) of the base station interface conversion device installed to perform interface conversion are set as the (C), and the 146th bit is set as the frame synchronization bit (SW) between the base station 230 and the base station control device 330; 1
The 47th bit is used as a maintenance bit (EOC) between the base station 230 and the base station controller 330, and the 1st bit from the 148th bit is 1
The 89th bit is the payload (PL) on the wireless interface, and the 190th to 193rd bits are D
The control and maintenance bits (C) of the base station interface converter installed to convert the base station interface from the DS1 line to another line on the S1 line.

The payload (PL) format of the base station interface using the DS1 line in this embodiment is the same as the payload (PL) format of the base station interface using the HDSL line, as shown in FIG.

The frame structure of the base station interface using the DSL line, the HDSL line, and the DS1 line in the present embodiment has a unified format as shown in FIGS. 4, 5, and 6, respectively. It is structured so that it can be easily divided and integrated from an interface to another line interface. In other words, three lines of the DSL line interface correspond to a half line (the second bit to the 45th bit or the 50th bit to the 93rd bit) of the HDSL line interface.
This corresponds to a quarter of the line interface (from the second bit to the 45th bit, the 50th bit to the 93rd bit, the 98th bit to the 141st bit, or the 146th bit to the 189th bit). Further, in this embodiment, the base station interface conversion device 400 which is not provided in the related art is used.
Control and maintenance bits are assigned.

FIG. 9 shows the configuration of a base station interface converter according to the present embodiment. FIG. 9A shows a case in which conversion is performed between an HDSL line and two sets of DSL circuits, and FIG. FIG. 3 is a diagram showing a case where HDSL line conversion is performed.

In FIG. 9A, when converting from a base station interface using an HDSL line to a base station interface using a DSL line, the
H of DSL conversion base station interface conversion device 410
DSL line base station interface receiver 411 is H
Receives transmission information from the DSL line. HDSL / DS
The L base station interface conversion unit 413 converts the transmission information into 2
Separate into a set of DSL line base station interfaces.
That is, the 2nd to 45th bits of the frame configuration of the HDSL line interface are assigned to one set of DSL lines, and the 50th to 93rd bits are set to one set of D lines.
Allocate and separate for SL line. Further, the transmission information for each set of DSL lines is separated into three DSL line base station interfaces. This transmission information is DS
The L-line base station interface transmission unit 414 uses DSL
It transmits to line base station 210. HDSL / DS
DSL of L conversion base station interface conversion device 410
The line base station interface receiving section 415 receives information received from the DSL line. The HDSL / DSL base station interface conversion unit 413 integrates the three DSL line base station interfaces into one set of DSL line reception information, and further integrates two sets of DSL line reception information H.
Integrate with DSL line base station interface. That is, the second to 45th bits of the frame configuration of the HDSL line base station interface are assigned to one set of DSL lines, and the 50th to 93rd bits are set to 1st.
Assign and consolidate for a set of DSL lines. This received information is transmitted to the HDSL line base station interface transmitting section 412.
Is transmitted to the HDSL link base station controller 320.

The control and maintenance of the HDSL / DSL conversion base station interface conversion device 410 are performed in HDSL / DSL conversion.
From the 46th bit of the frame configuration of the HDSL line base station interface from the line base station control device 320
This is performed using the ninth bit and the control and maintenance bits of the 94th to 97th bits.

In FIG. 9B, when converting from a base station interface using a DS1 line to a base station interface using an HDSL line, DS1 / H
D of DSL conversion base station interface conversion device 420
The base station interface receiving section 421 for the S1 line
Receives transmission information from one line. The DS1 / HDSL base station interface conversion unit 423 separates the transmission information into two HDSL line base station interfaces. That is, the second bit to the 97th bit of the frame configuration of the DS1 line interface are assigned to one HDSL line, and the 98th bit to the 193th bit are assigned to one HDSL line.
Allocate and separate for SL line. Send this transmission information to HD
The base station interface transmission unit 424 for SL line is HD
It transmits to SL line base station 220.

The HDSL line base station interface receiver 425 of the DS1 / HDSL conversion base station interface converter 420 receives information received from the HDSL line. The DS1 / HDSL base station interface conversion unit 423 receives reception information for two HDSL lines. DS1 / HDSL base station interface converter 4
23 integrates the received information for the two HDSL lines into the DS1 line base station interface. That is, the second to 97th bits of the frame configuration of the DS1 line base station interface are assigned to one HDSL line, and the 98th to 193th bits are assigned to one HDSL line for integration. The DS1 line base station interface transmitting section 422 transmits the received information to the DS1 line base station controller 330.

The control and maintenance of the DS1 / HDSL conversion base station interface conversion device 420 is performed by HDSL.
From the 46th bit of the frame configuration of the DS1 line base station interface from the line base station controller 330 to the 49th bit
1st bit, 94th bit to 97th bit, 142th bit to 145th bit, and 190th bit
This is performed using the 93rd control and maintenance bit.

FIG. 10 shows DS1 lines and 4
FIG. 3 is a diagram illustrating a configuration of a base station interface conversion device when converting a set of DSL lines.

In FIG. 10, when converting from a base station interface using a DS1 line to a base station interface using a DSL line, the DS1 / DSL base station interface receiving section 431 of the DS1 / DSL conversion base station interface converter 430 The transmission information from the DS1 line is received. The DS1 / DSL base station interface converter 433 separates the transmission information into four sets of DSL line base station interfaces. That is, 45 from the second bit of the frame configuration of the DS1 line interface.
Bits are assigned to one set of DSL lines, bits 50 to 93 are assigned to one set of DSL lines, 9
The 8th to 141st bits are assigned to one set of DSL lines, and the 146th to 189th bits are assigned to one set of DSL lines and separated. Further, the transmission information for each set of DSL lines is separated into three DSL line base station interfaces. This transmission information is
The transmission line 434 for the base station interface for the SL line is DS
It transmits to L-line base station 210.

The DSL line base station interface receiver 435 of the DS1 / DSL conversion base station interface converter 430 receives information received from the DSL line. DS1 / DSL base station interface converter 43
3 is the base station interface for three DSL lines
Into the received information for one set of DSL lines, and
The received information for the SL line is integrated into the DS1 line base station interface. That is, the 2nd to 45th bits of the frame configuration of the DS1 line base station interface are allocated to one set of DSL lines, and the 50th to 93rd bits are allocated to one set of DSL lines.
Bits 8 to 141 are assigned to one set of DSL lines, and bits 146 to 189 are assigned to 1
Assign and consolidate for a set of DSL lines. The DS1 line base station interface transmitting section 432 transmits the received information to the DS1 line base station controller 330.

The control and maintenance of the DS1 / DSL conversion base station interface converter 430 are performed by the DS1 line base station controller 330 from the 46th bit to the 49th bit and the 94th bit of the frame configuration of the DS1 line base station interface. 97th bit, 142th bit to 145th bit, and 190th bit to 193th bit
This is performed using the control and maintenance bits of the bit.

[0081]

As described above, the present invention firstly provides:
The base station interface between the base station and the base station controller is a digital transmission line having different transmission capacity, that is, DSL.
Line, an HDSL line, and a DS1 line, the frame structure of the base station interface corresponding to each digital transmission line is made in consideration of uniformity. It is possible to perform common control for each interface in the station control device, and also to perform common control for each interface in the base station interface conversion device that performs conversion from one base station interface to another base station interface. Therefore, the present invention has the effects of reducing the cost of each device and the maintenance and operation cost in the base station, the base station controller, and the base station interface converter.

Second, in order for the mobile station and the base station controller to perform concealment processing on user information and control information on the radio interface using the radio frame number, the base station controller transmits a radio frame to the base station. The base station transmits the number as data on the base station interface from the base station controller to the base station, and the base station transmits the radio frame number to the base station controller in the direction from the base station to the base station controller. Since the data is transmitted as data on the interface, even if there is a difference in transmission delay between a plurality of transmission lines constituting the base station interface between the base station and the base station control device, the radio transmitted by the base station control device to the base station. The frame number (radio frame number from the base station to the mobile station) and the radio frame number (mobile station number) received by the base station controller from the base station Since a radio frame number) in the direction of the Luo base station matches, has the effect that the security process in the base station controller is carried out correctly.

[Brief description of the drawings]

FIG. 1 shows a basic configuration of a mobile communication system. FIG. 1A shows a case where there is no base station interface converter.
(B) A diagram showing a case where a base station interface conversion device is present.

2A and 2B show a basic configuration of a base station interface of the mobile communication system shown in FIG. 1, wherein FIG. 2A shows a case where three DSL lines are used, and FIG. 2B shows a case where an HDSL line is used. (C) is a diagram showing a case where a DS1 line is used.

3A and 3B show internal configurations of a base station and a base station control device in an embodiment of the present invention. FIG. 3A shows a case where three DSL lines are used, and FIG. 3B shows a case where an HDSL line is used. (C) is a diagram showing a case where a DS1 line is used.

FIG. 4 is a diagram showing a frame configuration of a base station interface using a DSL line in the present embodiment shown in FIG.

FIG. 5 shows an HDSL according to the embodiment shown in FIG.
FIG. 3 is a diagram illustrating a frame configuration of a base station interface using a line.

FIG. 6 is a diagram showing a frame configuration of a base station interface using a DS1 line in the present embodiment shown in FIG. 3 (c).

FIG. 7 shows a payload format of a base station interface using a DSL line in the embodiment;
(A) is a diagram showing a payload mat from the base station controller to the base station, and (b) is a diagram showing a payload format from the base station to the base station controller.

FIG. 8 is a diagram showing a payload format of a base station interface using an HDSL line or a DS1 line in the embodiment.

FIG. 9 shows the configuration of a base station interface conversion device according to the present embodiment, wherein (a) shows an HDSL line and two sets of DSLs;
FIG. 7B is a diagram showing a case where a line is converted, and FIG. 7B is a diagram showing a case where a DS1 line and two sets of HDSL lines are converted.

FIG. 10 shows a DS1 line and four sets of DSLs in this embodiment.
FIG. 3 is a diagram illustrating a configuration of a base station interface conversion device when performing line conversion.

FIG. 11 shows each internal configuration of a base station and a base station control device in a conventional mobile communication system, and FIG.
The figure which shows the case where three lines are used, (b) is HDSL
FIG. 3C is a diagram illustrating a case where a line is used, and FIG. 3C is a diagram illustrating a case where a DS1 line is used.

FIG. 12 is a diagram showing a frame configuration of a base station interface when the conventional DSL line shown in FIG. 11A is used.

FIG. 13 is a diagram showing a frame configuration of a base station interface when the conventional HDSL line shown in FIG. 11B is used.

FIG. 14 is a diagram showing the configuration of a base station interface when the conventional DS1 line shown in FIG. 11C is used.

15 shows a configuration of a conventional base station interface conversion device. FIG. 15 (a) shows a conventional base station interface using a DSL line shown in FIG. 12 and an HDSL shown in FIG.
FIG. 13B is a diagram showing conversion between a base station interface using a line and FIG. 14B is a diagram showing conversion between a base station interface using an HDSL line shown in FIG. 13 and a base station interface using a DS1 line shown in FIG. 15C is a diagram showing conversion between the base station interface using the DS1 line shown in FIG. 14 and the base station interface using the DSL line shown in FIG.

[Explanation of symbols]

REFERENCE SIGNS LIST 100 mobile station 200 base station 210 DSL line base station 211 DSL line base station interface reception unit 212 DSL line base station interface transmission unit 213 transmission frame control unit 214 reception frame control unit 215 radio interface transmission unit 216 radio interface reception unit 217 Frame number addition unit 218 Coupling unit 220 HDSL line base station 221 HDSL line base station interface reception unit 222 HDSL line base station interface transmission unit 223 Transmission frame control unit 224 Reception frame control unit 225 Wireless interface transmission unit 226 Wireless interface Receiving unit 227 Frame number adding unit 228 Combiner 230 Base station for DS1 line 231 Base station interface receiving unit for DS1 line 232 D Base station interface transmission unit for one line 233 Transmission frame control unit 234 Receive frame control unit 235 Radio interface transmission unit 236 Radio interface reception unit 237 Frame number addition unit 238 Coupling unit 300 Base station control unit 310 Base station control unit for DSL line 311 Transmission information concealment processing unit 312 Received information concealment processing unit 313 Transmission frame control unit 314 Receive frame control unit 315 DSL line base station interface transmission unit 316 DSL line base station interface reception unit 317 Frame number extraction unit 320 HDSL line base station Control device 321 Transmission information concealment processing unit 322 Received information concealment processing unit 323 Transmission frame control unit 324 Receive frame control unit 325 HDSL line base station interface transmission unit 326 HD SL line base station interface receiving unit 327 Frame number extracting unit 330 DS1 line base station control device 331 Transmission information concealment processing unit 332 Received information concealment processing unit 333 Transmission frame control unit 334 Receive frame control unit 335 DS1 line base station interface Transmitter 336 DS1 line base station interface receiver 337 Frame number extractor 400 Base station interface converter 410 HDSL / DSL conversion base station interface converter 411 HDSL line base station interface receiver 412 HDSL line base station interface transmitter 413 HDSL / DSL base station interface converter 414 DSL line base station interface transmitter 415 DSL line base station interface receiver 420 D S1 / HDSL conversion base station interface converter 421 DS1 line base station interface receiver 422 DS1 line base station interface transmitter 423 DS1 / HDSL base station interface converter 424 HDSL line container base station interface transmitter 425 HDSL line container Station interface receiver 430 DS1 / DSL conversion base station interface converter 431 DS1 line base station interface receiver 432 DS1 line base station interface transmitter 433 DS1 / DSL base station 434 DSL line base station interface transmitter 435 DSL line Base station interface receiver 500 antenna

Continuation of the front page (56) References JP-A-7-67175 (JP, A) JP-A-8-70335 (JP, A) BELLCORE TECHNICA L REFERNCAL TR-INS -001313 ISSUE 1, OCTOBER 1993 "GENERIC CRITERIA" FOR VERSION 0.1 WIRELESS ACCES S COMMUNICATION SY STEMS (WACS) "

Claims (7)

(57) [Claims] 1. A radio interface between a mobile station and a base station, a base station interface between the base station and a base station controller, wherein the base station controller is connected to a communication network via a switching center. Wherein the mobile station terminates a lower layer signal and a higher layer signal of the radio interface.
The base station has transmission means for terminating a lower-layer signal of the radio interface and the base station interface and transmitting the higher-layer signal transparently, and the base station control device includes the base station. The mobile station has second terminating means for terminating a lower layer signal and a higher layer signal of an interface, and the mobile station communicates with the base station and the base station controller via the radio interface and the base station interface. In a mobile communication system which provides a service for performing communication by performing connection control and concealing user information on the wireless interface for a user of the mobile station, the base station interface can increase a data transmission capacity of 144 kbit / s. Using three digital transmission lines (hereinafter referred to as DSL lines) , When the wireless interface and the base station interface are of a time division multiple access system, the frame structure of one DSL line of the three DSL lines is
One frame is composed of 8 bits, 20 frames are 1 multiframe, 1 bit is a frame synchronization bit between the base station and the base station controller, and the second bit is the base station and the base station controller. A mobile communication system comprising: a first communication unit that performs communication between user information and control information, wherein maintenance bits are used as maintenance bits between the third and eighteenth bits, and data on the wireless interface is used as the data. 2. A radio interface between a mobile station and a base station, and a base station interface between the base station and a base station controller, wherein the base station controller is connected to a communication network via a switching center. Wherein the mobile station terminates a lower layer signal and a higher layer signal of the radio interface.
The base station has transmission means for terminating a lower-layer signal of the radio interface and the base station interface and transmitting the higher-layer signal transparently, and the base station control device includes the base station. A second terminal for terminating a lower layer signal and a higher layer signal of an interface, wherein the mobile station communicates with the base station and the base station controller via the radio interface and the base station interface to establish a communication connection; In a mobile communication system for providing a service of concealing user information on the wireless interface to a user of the mobile station by performing control, the base station interface has a data transmission capacity of 776 kbit / s. It is configured using one transmission line (hereinafter, referred to as HDSL), When the line interface and the base station interface are of a time division multiple access type, the frame structure of the HDSL line is based on one frame consisting of 97 bits,
20 frames are defined as one multi-frame, the first bit is a frame synchronization bit of the HDSL line, the second bit is a frame synchronization bit between the base station and the base station controller, and the third bit is the base station and the base station. Bits 4 to 45 are data on the wireless interface, bits 46 to 49 are bits for maintenance between base station controllers, and bits 46 to 49 are HD bits on the HDSL line.
A control and maintenance bit of a base station interface converter installed for converting the base station interface from an SL line to another line, and a 50th bit is a frame between the base station and the base station controller. A synchronization bit; a 51st bit is a maintenance bit between the base station and the base station controller; a 52nd bit to a 93rd bit are data on the wireless interface;
User information from bit number 97 to bit number 97 for control and maintenance of the base station interface converter installed for converting the base station interface from the HDSL line to another line on the HDSL line A mobile communication system, comprising: a second communication unit that performs communication between the control information and the control information. 3. A radio interface between a mobile station and a base station, and a base station interface between the base station and a base station controller, wherein the base station controller is connected to a communication network via a switching center. Wherein the mobile station terminates a lower layer signal and a higher layer signal of the radio interface.
The base station has transmission means for terminating a lower-layer signal of the radio interface and the base station interface and transmitting the higher-layer signal transparently, and the base station control device includes the base station. The mobile station has second terminating means for terminating a lower layer signal and a higher layer signal of an interface, and the mobile station communicates with the base station and the base station controller via the radio interface and the base station interface. In a mobile communication system for providing a service of performing communication by performing connection control to conceal user information on the wireless interface for a user of the mobile station, the base station interface is 1.544 Mbit / s.
Digital transmission line (hereinafter referred to as D
S1 line), and when the radio interface and the base station interface are of a time division multiple access system, the frame configuration of the DS1 line is based on one frame consisting of 193 bits. , 20 frames as one multi-frame, the first bit as the frame synchronization bit of the DS1 line,
The fourth bit is a frame synchronization bit between the base station and the base station controller, the third bit is a maintenance bit between the base station and the base station controller, and the fourth bit is 45 bits.
The bit is data on the wireless interface,
Bits 46 to 49 are used as control and maintenance bits for a base station interface converter installed to convert the base station interface from the DS1 line to another line on the DS1 line, and 50 bits The first bit is a frame synchronization bit between the base station and the base station controller, the 51st bit is a maintenance bit between the base station and the base station controller,
The bit is data on the wireless interface,
The 94th to 97th bits are used as control and maintenance bits of the base station interface converter installed to convert the base station interface from the DS1 line to another line on the DS1 line;
The bit is a frame synchronization bit between the base station and the base station controller, the 99th bit is a maintenance bit between the base station and the base station controller, and the 100th to 141st bits are the wireless interface. As the above data, the 142nd to 145th bits are converted to the DS
The 146th bit is used as control and maintenance bits for the base station interface conversion device installed to convert the base station interface from the DS1 line to another line on one line. The frame synchronization bit between the station control device and the 147th bit as a maintenance bit between the base station and the base station control device,
The 148th bit to the 189th bit are set as data on the wireless interface, and the 190th bit to the 193th bit are set on the DS1 line to convert the base station interface from the DS1 line to another line. A mobile communication system, comprising: third communication means for communicating user information and control information as control and maintenance bits of the base station interface converter. 4. The base station has the base station interface configured using the three DSL lines, the base station has two base stations, and the base station control device is one of the HDSL lines. And the base station interface of the base station by the DSL line for two base stations and the base station controller by the one HDSL line 3. The mobile communication system according to claim 1, further comprising first conversion means for converting the base station interface into the base station interface. 5. The base station has the base station interface configured using one HDSL line, the base station has two base stations, and the base station control device is one DS1 line. In the case where the base station interface is configured by using the base station interface, the base station interface on the base station side by the HDSL line for two base stations and the base station control device by one DS1 line And a second conversion unit for converting between the base station interface and the base station interface.
And the mobile communication system according to claim 3. 6. The base station has the base station interface configured using the three DSL lines, the base station has four base stations, and the base station control device has one DS1 line. And the base station controller using the DS1 line for one base line and the base station interface on the base station side using the DSL lines for four base stations when the base station interface is configured using 4. The mobile communication system according to claim 1, further comprising third conversion means for mutually converting the base station interface with the base station interface. 7. The wireless interface is a time division multiple access system, and the mobile station and the base station controller perform concealment processing on user information and control information on the wireless interface using a wireless frame number. The base station controller transmits the radio frame number to the base station as data on the radio interface from the base station controller to the mobile station, and the mobile station transmits to the base station. Does not transmit the radio frame number as data on the radio interface in the direction from the mobile station to the base station, so that the base station sends the radio frame number to the base station controller When not transmitting as data on the base station interface in the direction of the base station controller from the base station, Receives the radio frame number transmitted by the base station to the mobile station as data on the radio interface in the direction from the base station to the mobile station, after a predetermined period of time corresponding to a transmission frame. And transmitting the wireless frame number as data on the base station interface in a direction from the base station to the base station controller by adding the wireless frame number to the data on the wireless interface received from the mobile station as a received frame to be transmitted. Means, the base station control device has means for receiving as data on the base station interface, the base station control device receives a radio frame number on the base station interface, and the radio frame number Use to perform concealment processing on user information and control information on the wireless interface Claim 1, claim 2 and claim 3 mobile communication system, wherein further comprising a management unit.