JP2005244575A - Digital mobile radio system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem wherein communication is not established since data cannot be restored when the data are received from other radio base stations using a scramble code for communication CH that is different from a radio system to which a radio terminal station originally belongs to in a conventional digital mobile radio system. <P>SOLUTION: In a digital mobile radio system in which communication link is achieved by at least one radio base station and a plurality of radio terminal stations, each of the plurality of radio terminal stations has a memory table in which a manufacturer code and the scramble code are stored in advance. In this case, when a control channel receives report information transmitted by at least one radio base station and the manufacturer code contained in the notice information is not the manufacturer code stored in advance, the manufacturer code of the radio base station and the scramble code are added to the memory table for storage, and the scramble code is set based on the added and stored manufacturer code, thus establishing the radio communication at a communication channel. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a digital mobile radio system, and more particularly to a digital mobile radio system used for municipal disaster prevention.

FIG. 8 shows an example of a configuration diagram of a conventional digital mobile radio system.
FIG. 8 includes a radio base station 810-1 connected to the control station 81 and a radio relay station 8100-1 connected to the radio base station 810-1, and connected to the control station 81. Wireless base station 810-2, and a wireless relay station 8100-2 wirelessly connected to the wireless base station 810-2, and both wireless base stations 810-1 and 810-2 It is composed of a radio relay station 8100-3 to be connected.
Then, a plurality of wireless terminal stations 80-1, 80-2,..., 80-n move to the area of each wireless base station or each wireless relay station (that is, within the area controlled by the control station 81). It is arranged as a terminal.
Such a conventional radio system is, for example, a digital mobile radio system for disaster prevention in municipalities. In this radio system, one control station is installed in one municipality in a city hall or government office, and each municipality in the municipality. A radio base station or radio relay station is installed in the area, and government officials and patrolmen who travel around the municipality carry radio terminal stations, and communicate between disaster prevention and disasters between the control station and the radio terminal station, Alternatively, a wireless system for wireless communication between wireless terminal stations via a wireless base station or a wireless relay station has been constructed.

FIG. 9 is an example of a sequence diagram in which communication is established between a conventional wireless terminal station and a wireless base station.
An operation of location registration when the wireless terminal stations 80-1 and 80-6 are arranged in the area of the wireless base station 810-1 will be described.
First, communication in the radio base station is performed by a control channel (control CH) and a communication channel (communication CH), the control CH is a channel for transferring control information necessary for call connection, and the communication CH is a user (control station or , A wireless terminal station) is a channel for transferring voice and data information during communication.

The radio base station 810-1 constantly transmits broadcast information to the radio area (or at predetermined intervals), and this is received by radio terminal stations in the area.
The broadcast information is information for broadcasting control information from the radio base station to the radio terminal station, and includes information on the control channel structure and information on the system.
The wireless terminal station 80-1 extracts a system code, a base station code, and the like from the broadcast information, and identifies the wireless base station (in this case, the wireless base station 810-1).
The wireless terminal station 80-1 transmits a location registration request 202-1 to the control station (its line control device) 81 via the identified wireless base station 810-1.
In response to this request, the control station 81 transmits a location registration acceptance 203-1 to the wireless terminal station 80-1 via the wireless base station 810-1, thereby performing location registration of the wireless terminal station 80-1.
As a result, the control station 81 recognizes that the wireless terminal station 80-1 is located in the control zone of the wireless base station 810-1.
The series of flows is the same in the wireless terminal station 80-6, and after receiving the broadcast information, the wireless terminal station 80-6 sends a location registration request 202-2 to the control station 81 via the wireless base station 810-1. In response to this request, the control station 81 transmits a location registration reception 203-2 to the radio terminal station 80-6 via the radio base station 810-1 to perform location registration.

Next, establishment of communication between the wireless terminal stations 80-1 and 80-6 in the state where the above-described location registration has been performed will be described.
When making a call from the wireless terminal station 80-1 to the wireless terminal station 80-6, if a call destination number (a unique number of the wireless terminal station 80-6) is input and off-hooked (S901-2), the wireless terminal station 80-1 itself starts to emit dial tone (S901-3).
The wireless terminal station 80-1 transmits a wireless state report 204 for notifying the wireless base station 810-1 of wireless terminal information such as the type of terminal station and the reception level, and sets up a call to the wireless base station during duplex communication. Is transmitted by the control CH, and as a response to this, a call setting acceptance 205 is returned from the radio base station 810-1 to the radio terminal station 80-1.
Then, the display unit of the wireless terminal station 80-1 displays that the requested call setup has been started.
The radio base station 810-1 sends a paging signal to the radio terminal station 80-6 in order to make an incoming call for individual communication, notifies the communication mode 206 requested by the caller, and, as a response, the radio base station 810-1 The terminal station 80-6 to the radio base station 810-1 includes the incoming radio status report 207 including the incoming station identification number together with the radio status information such as the type and reception level of the terminal station itself, and the calling side (radio terminal station 80-1) The communication availability 207 indicating whether or not the communication mode requested by the user can be handled is transmitted.

On the other hand, the radio base station 810-1 performs the synchronization burst (SB1) 208-1 in the communication CH in order to synchronize with the communication CH with the radio terminal station 80-1 after the call setup acceptance 205 on the control CH described above. Is sending.
Also, a radio channel designation 209 including a scramble code for the communication CH of the radio base station 810-1 is transmitted to the radio terminal station 80-1, and on this occasion, the radio terminal station 80-1 side uses the communication CH The CH is switched from the control CH to the communication CH so that reception processing is performed with the corresponding scramble code among the scramble codes (S901-4).
Thereafter, exchange of synchronization bursts (SB1 to SB4) 208-1 to 204-1 is performed between the wireless terminal station 80-1 and the wireless base station 810-1 until synchronization is established.

The radio base station 810-1 that has received the incoming radio status report and the communication availability 207 also synchronizes with the radio CH 80-6 in order to synchronize with the radio CH 80-6 via the communication CH. -1 is transmitted, and a radio channel designation 209 including a scramble code for the communication CH of the radio base station 810-1 is transmitted to the radio terminal station 80-6. On the 6th side, switching from the control CH to the communication CH is performed such that reception processing is performed with the corresponding scramble code among the scramble codes for the communication CH (S901-6).
Thereafter, exchange of synchronization bursts (SB1 to SB4) 208-1 to 4 is performed between the wireless terminal stations 1-6 and the wireless base station 20 until synchronization is established.

After establishing the synchronization by the communication CH between each wireless terminal station and the wireless base station by the above-described operation, the wireless base station 810-1 sets the call to the wireless terminal station 80-6 that is the receiving station. Data is transmitted on communication CH to start 210.
Then, when the wireless terminal station 80-6 decodes the received data using the corresponding scramble code for the communication CH, a ring tone starts to ring (S901-8).
After the ringing tone, the wireless terminal station 80-6 calls 211 to the wireless terminal station 80-1 via the wireless base station 810-1, and the wireless terminal station 80-1 switches from the dial tone to the ringing tone ( S901-9).
Thereafter, when the wireless terminal station 80-6 is off-hook (S901-10), the call is started.

Here, the scramble code will be described.
In a regional disaster prevention wireless system that performs wireless communication between a wireless terminal station and a wireless base station, when transmitting voice, data, and control information, the data part of the communication channel is scrambled to prevent interference and wiretapping. Is done.
Scrambling is a method of randomizing a code string using a PN code (Pseudo Noise: pseudo random code) or M sequence code (Maximum period sequence code). It is defined as a scramble code.
In addition, the same value is used for the scramble code between the radio terminal station and the radio base station. The scramble code is used for data coding on the transmission side, and the same scramble code is used on the reception side for the transmission side. The received data is decrypted.
Therefore, if the codec decoding process is performed with different scrambling codes between the terminal station and the base station, data cannot be reproduced on the receiving side.

For example, there are Patent Documents 1 to 3 and Non-Patent Document 1 as techniques related to conventional digital mobile radio systems.

Japanese Patent Laid-Open No. 2001-258056 JP 2001-345800 A JP 2003-141669 A Municipal digital mobile communication system ARIB STD-T79 (Radio Industry Association)

For example, in the case of a wireless system based on the standard “Municipal Digital Mobile Communication System ARIB STD-T79” (National Radio Industry Association), which is a non-patent document 1, the scramble code for the control channel is not dependent on the manufacturer, However, the scramble code for communication CH differs depending on the system and manufacturer.
In the conventional wireless system as shown in FIGS. 8 and 9, the base station 810-1 and the terminal stations 80-1 and 80-6 use the same scramble code for the communication CH. Although communication is established, for example, when the manufacturers are different, the scramble code is also different, so that communication is not established on the communication CH (cannot be descrambled).
That is, when the receiving side radio terminal station is the same system as the base station, the same scrambling code is used, so that the received data is decoded without any problem. However, in the radio terminal stations of different manufacturers, However, since the scramble codes for the communication CH are different, there is a problem that data cannot be restored at the time of reception and communication becomes impossible.

The present invention has been made in view of the above prior art. In the conventional digital mobile radio system, the radio terminal station uses a scramble code for communication CH different from the radio system to which the radio terminal station originally belongs. An object of the present invention is to solve the problem that communication cannot be established because data cannot be restored when data is received.

In order to solve the above-described conventional problems, the present invention is a digital mobile radio system in which at least one radio base station and a plurality of radio terminal stations form a communication link, and the radio base station includes broadcast information including a manufacturer code. A wireless terminal station that has received the broadcast information on the control channel, a means for extracting a scramble code of a communication channel used by the wireless base station from the manufacturer code, Means for switching the channel from the control channel to the communication channel, and scramble code setting means for setting the extracted scramble code and performing descrambling by the communication channel, and the radio terminal station has the radio base station A communication link is established by a scramble code based on the manufacturer code.

In order to solve the above-described conventional problems, the present invention provides a municipal disaster prevention in which at least one control station, at least one radio base station connected to the control station, and a plurality of radio terminal stations form communication links. In the digital mobile radio system, the wireless base station transmits the broadcast information including the manufacturer code on the control channel, and the wireless terminal station that has received the broadcast information on the control channel includes: Means for extracting the format of the scramble code of the communication channel used by the radio base station; means for switching the channel from the control channel to the communication channel; and setting the extracted scramble code to determine the communication channel Scramble code setting means for performing descrambling, and the radio terminal station includes the manufacturer code of the radio base station. By Zui scrambling code, and establishes a communication link with the control station or other wireless terminal stations.

Furthermore, in order to solve the above-described conventional problems, the present invention provides the digital mobile radio system according to claim 1 or 2, wherein any one of the radio base stations is a radio relay station. Wirelessly connected, the radio base station and the radio relay station each have a unique base station code or relay station code, and transmit a system code based on these base station code or relay station code included in the broadcast information, The wireless terminal station that has received the broadcast information extracts the manufacturer code of the wireless base station or the wireless relay station, extracts the base station code or the relay station code, and extracts the manufacturer code and the base station code or Scramble code setting means for setting a scramble code by a system code based on the relay station code is provided.

In order to solve the above-described conventional problems, the present invention provides the digital mobile radio system according to claim 3, wherein any of a plurality of radio terminal stations is a radio base station. Alternatively, when establishing a communication link via a radio relay station, the manufacturer code is transmitted / received by including the manufacturer code of the radio base station or radio relay station in the broadcast information, and the scramble code is a radio terminal station Each is set independently.

Further, in order to solve the above-described conventional problems, the present invention provides a digital mobile radio system in which at least one radio base station and a plurality of radio terminal stations form a communication link, and each of the plurality of radio terminal stations includes: A memory table in which a manufacturer code and a scramble code are stored in advance is provided, and when the broadcast information transmitted from the at least one radio base station is received through a control channel, the manufacturer code included in the broadcast information is stored in advance. If it is not a manufacturer code, a manufacturer code and a scramble code of the radio base station are additionally stored in the memory table, a scramble code is set based on the additionally stored manufacturer code, and wireless communication is performed on a communication channel. It is characterized by establishing.

According to the present invention, in a conventional digital mobile radio system, data is restored when data is received from another radio base station that uses a scramble code for communication CH different from the radio system to which the radio terminal station originally belongs. Because it is not possible, the problem that communication is not established can be solved, and by changing the scramble code of the wireless terminal station based on the broadcast information transmitted from the wireless base station when receiving at the wireless terminal station It is possible to provide a digital mobile radio system capable of establishing communication under a radio system by radio base stations having different scramble codes for communication CH.

Embodiments of the present invention will be described.
For example, in a digital mobile radio system for disaster prevention in municipalities, one control station for each municipality is installed in the city hall or government office, and a radio base station or radio relay station is installed in each area within the municipality. Office staff and patrol officers who circulate the inside carry radio terminal stations and communicate between the control station and the radio terminal station, or between radio terminal stations for disaster prevention and disaster prevention. A wireless system for wireless communication is established.
Here, when multiple municipalities integrate the wireless system itself by administrative actions such as municipal mergers, it is necessary to configure a digital mobile radio system for municipal disaster prevention using a digital mobile radio system integrated using the existing wireless system Occurs.
Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 2 shows an example of a configuration diagram of a digital mobile radio system according to an embodiment of the present invention.
In FIG. 2, the first control station 21 and the radio base stations 10 (10-1, 10-2,..., 10-n) connected thereto are connected to the radio base station 10 by radio. The first control station 21 has jurisdiction over the first area with the radio relay station 100 (100-1, 100-2,..., 100-n), and is connected to the second control station 22 with this. Radio base stations 20 (20-1, 20-2,..., 20-n), and radio relay stations 200 (200-1, 200-2,...) Connected to the radio base station 20 by radio. 200-n), the second control station 22 has jurisdiction over the second area.
In the first area, a plurality of wireless terminal stations 1-1, 1-2,..., 1-n are arranged as mobile terminals, and in the second area, a plurality of wireless terminal stations 2-1 are arranged. 2-2,..., 2-n are arranged as mobile terminals.

Here, depending on the size of the area controlled by each control station and the number of mobile terminals, at least one radio base station 10 or 20 may be provided for one control station.
Also, there may be no radio relay stations 100 and 200 or a plurality of radio relay stations 100 and 200 may be installed depending on the scale of each area.
As described above, when a plurality of municipalities integrate the wireless system itself by administrative actions such as municipal mergers, the digital mobile wireless system for disaster prevention of municipalities is created by the digital mobile wireless system integrated using the existing wireless system. It may be necessary to configure, and the manufacturers of existing wireless systems may be different.
In addition, in the jurisdiction of one control station, when a radio base station or a radio relay station is added, a station (a radio base station or a radio relay station) by a manufacturer different from each existing station may be added. .
In addition, a mobile terminal in an area under the jurisdiction of an arbitrary control station may move to and support an area under the jurisdiction of another control station. In some cases, the manufacturer is different from the mobile terminal in the area under the jurisdiction of another control station.

Next, the operation of the digital radio system according to the embodiment of the present invention will be described.
FIG. 1 is a first example of a sequence diagram in which communication is established between a wireless terminal station and a wireless base station according to an embodiment of the present invention.
First, the location registration operation when the wireless terminal stations 2-1 and 1-6 are arranged in the area of the wireless base station 20 will be described.
The radio base station 20 transmits broadcast information to a radio terminal station in the radio area constantly or at a predetermined interval.
The wireless terminal station 2-1 extracts the manufacturer number from the broadcast information together with the system code, base station code, control zone code, etc. (S101-1), and the wireless terminal station stores the system code and base stored so far. Information such as station code and control zone number is updated and stored.
And about the extracted manufacturer number, it is determined whether there exists what corresponds to the manufacturer number memorize | stored until then as shown in FIG.7 (b) mentioned later.
Regardless of the result of the manufacturer number determination, the location registration operation is performed.
In the location registration operation, after S101-1, based on information such as the system code, base station code, and control zone number included in the broadcast information, which radio base station is the area of the radio terminal station Identify.
The wireless terminal station 2-1 transmits a location registration request 202-1 to the second control station 22 via the identified wireless base station 20.
In response to this request, the second control station 22 transmits the location registration acceptance 203-1 to the wireless terminal station 2-1 via the wireless base station 20, thereby performing the location registration of the wireless terminal station 2-1.

Thereafter, when a call or the like is made, if there is a matching manufacturer number in S101-1, the scramble code corresponding to the manufacturer number is changed after channel switching (control CH) based on the system code. After switching from the communication CH to the communication CH).
If there is no matching manufacturer number (S101-2), the location registration operation is performed in the same manner as when there is a matching manufacturer number. Since there is no scramble code corresponding to the number, the current scramble code cannot be used in the communication CH.
This will be described later.

Next, establishment of communication between the wireless terminal stations 2-1 and 1-6 in a state where the above-described location registration has been performed will be described.
When making a call from the wireless terminal station 2-1 to the wireless terminal station 1-6, if a call destination number (a unique number of the wireless terminal station 1-6) is input and off-hook (S101-2), the wireless terminal station 2-1, the dial tone starts to flow (S101-3).
A transmission radio status report and duplex call setting 204 for notifying the radio status information from the radio terminal station 2-1 to the radio base station 20 are sent out by the control CH, and in response to this, to the radio terminal station 2-1 Call setting acceptance 205 is returned.
The radio base station 20 sends a paging signal 206 to the radio terminal station 1-6 to make an incoming call for individual communication, and notifies the communication mode 206 requested by the caller. The station 1-6 transmits an incoming radio state report including an incoming call identification number and communication availability 207 together with radio state information to the radio base station 20.

On the other hand, the radio terminal station 2-1 and the radio base station 20 transmit and receive the synchronization burst (SB1) 208-1 in the communication CH after the call setting acceptance 205 in the control CH described above in order to synchronize with the communication CH. In addition, a radio channel designation 209 including a communication CH scramble code based on the system code of the radio base station 20 is transmitted and received, and the radio terminal station 2-1 side uses this as a communication CH scramble code. In order to perform reception processing, CH switching from the control CH to the communication CH is performed (S101-4).
Next, the uplink / downlink communication CH scramble code determined from the system code and manufacturer number extracted in S101-1 is used for the communication CH of the radio base station 20 included in the radio channel designation 209. A scramble code that can be scrambled by applying a scramble code is set as a communication CH scramble code value for the wireless terminal station 2-1 (S101-5).
Here, since the wireless terminal station 2-1 has the same manufacturer number in S101-1, the scramble code corresponding to the manufacturer number is applied based on the system code, and the scramble code value is Will be set.
Thereafter, the synchronization bursts (SB1 to SB4) 208-1 to 20-4 are exchanged between the wireless terminal station 2-1 and the wireless base station 20 until synchronization is established.

On the other hand, the radio terminal station 1-6 does not have the same manufacturer number in the above-described S101-2 when the incoming radio status report on the control CH and the communication availability 207 are made to the radio base station 20. Therefore, a signal indicating that the scramble code cannot be released is included and transmitted.
Then, the extracted manufacturer number is added and stored in the memory table of the wireless terminal station 1-6, as shown in FIG.
In order to synchronize with the communication CH from the radio base station 20 to the radio terminal station 1-6, the synchronization burst (SB1) 208-1 is transmitted in the communication CH, and based on the system code in the control CH The wireless channel designation 210 including the scramble code for the communication CH is transmitted, and is linked to and stored in the additionally stored manufacturer number of the wireless terminal station 1-6 that has received it.
On this occasion, the radio terminal station 1-6 side switches the CH from the control CH to the communication CH in order to perform reception processing with the scramble code for the communication CH (S101-6).
Next, the scramble code for the communication CH of the radio base station 20 included in the radio channel designation 210 is applied to the scramble code for the uplink / downlink communication CH based on the additionally stored system code and manufacturer number, and descrambling is performed. A scramble code that can be used is set as a scramble code value for communication CH of the wireless terminal station 1-6 (S101-7).
Here, the wireless terminal station 1-6 did not have a matching manufacturer number in the above-described S101-2, but the manufacturer number extracted at that time was based on the system code included in the wireless channel designation 210. When the scramble code is received, it is linked and stored, and the scramble code corresponding to the additionally stored manufacturer number is applied to set a scramble code value.
Thereafter, exchange of synchronization bursts (SB1 to SB4) 208-1 to 4 is performed between the wireless terminal stations 1-6 and the wireless base station 20 until synchronization is established.

Thus, in the case of the wireless terminal station 2-1, since it is a wireless terminal station originally under the jurisdiction of the second control station 22, the manufacturer number used by the wireless terminal station 2-1 until then is used as it is. Although used, the wireless terminal station 1-6 is not originally a wireless terminal station under the jurisdiction of the second control station 22 (that is, it was originally a wireless terminal station under the jurisdiction of the first control station 21. Therefore, the manufacturer number and the scramble code that the wireless base station 20 has added and stored in the manufacturer number that has been used until then are registered, so that communication in the communication CH can be performed even in the area of the wireless base station 20. Is possible.

After establishing the synchronization by the communication CH between the wireless terminal stations 2-1 and 1-6 and the wireless base station 20 by the above-described operation, the wireless terminal station 1 -the wireless terminal station 1- In order to start call setting 210 for 6, data is transmitted on communication CH.
Then, when the wireless terminal station 1-6 performs a decoding process on the received data using the set communication CH scramble code, a ring tone starts to ring (S101-8).
After the ringing tone, the wireless terminal station 1-6 calls the wireless terminal station 2-1 via the wireless base station 20, and the wireless terminal station 2-1 switches from the dial tone to the ringing tone (S101-). 9).
Thereafter, when the wireless terminal station 1-6 goes off-hook (S101-10), a call is started, that is, communication is established.
From the above, even in a wireless system in which the scramble code for communication CH based on the system code between the wireless base station and the wireless terminal station is different, the descrambling can be performed by additionally storing the scramble code. Restoration is performed and communication is established.

FIG. 3 is an example of a block diagram of a wireless terminal station according to an embodiment of the present invention. FIG. 3A is an example of a hardware block diagram, and FIG. 3B is an example of a functional block diagram related to wireless control. is there.
3A includes a control unit 31, a storage unit 32, an operation unit 33, a microphone (audio input unit) 34, a display unit 35, a speaker (audio output unit) 36, a radio unit 37, a transmission / reception antenna, and the like. .
FIG. 3B is a functional block diagram relating to the control unit 31 that controls the wireless unit 37 and the storage unit 32 of FIG. 3A described above. The scramble / descramble processing unit 301, the manufacturer code memory 302, the frame A decomposition unit 303, a frame synchronization unit 304, and a frame configuration unit 305 are configured.
The wireless terminal station stores a unique number (telephone number) given to the terminal station in advance at the time of shipment, a manufacturer number, and a scramble code in the control unit 31 (storage means) or the storage unit 32. Yes.
This memory table will be described in detail with reference to FIG.

FIG. 4 is an example of a block diagram of a radio base station according to the embodiment of the present invention.
4 includes a control unit 41, a storage unit 42, an interface 47, a transmission unit 43, a transmission antenna, a reception unit 44, a reception antenna, and the like.
The radio base station stores a base station number, a manufacturer number, and a scramble code previously assigned to the terminal station at the time of shipment in the control unit 41 (storage means) or the storage unit 42.
The interface 47 is connected to the control station and may be connected to other radio base stations.

FIG. 5 is an example of a block diagram of a radio relay station according to the embodiment of the present invention.
FIG. 5 includes a control unit 51, a storage unit 52, a transmission unit 53, a transmission antenna, a reception unit 54, a reception antenna, and the like.
The wireless relay station stores the relay station number, the manufacturer number, and the scramble code previously assigned to the terminal station at the time of shipment in the control unit 51 (storage means) or the storage unit 52.

FIG. 6 is an example of a block diagram of the control station according to the embodiment of the present invention.
In FIG. 6, a control station is constituted by the line control device and the console.
The line control device includes a control unit 611, a data storage unit 621, an operation unit 63, a microphone (voice input unit) 64, a display unit 65, a speaker (voice output unit) 66, a line control unit 612, a line control storage unit 622, and an interface. 67.
The console includes an operation unit 63, a microphone (speech input unit) 64, a display unit 65, and a speaker (speech output unit) 66, which can be directly operated by the operator.
The control station stores the system number and manufacturer number previously assigned to the station at the time of shipment in the line control unit 612 (storage means) or the line control storage unit 622.
Further, the line control storage unit 622 stores and updates the location registration status of the radio terminal station for each radio base station, and this memory table will be described in detail later with reference to FIG.

FIG. 7 is a memory table related to a scramble code according to the embodiment of the present invention. FIG. 7A is a table of a control station, and FIG. 7B is a table of a wireless terminal station.
FIG. 7A is a memory table related to the scramble code in the line control storage unit 622 of the control station, and is a base station or relay station code M711, a radio terminal station that is currently registered in the radio base station or radio relay station. A code M712, a manufacturer number update flag M713 when the manufacturer number of the wireless terminal station M712 is reset, and a scramble code M714 when the wireless terminal station M712 establishes communication.
FIG. 7B is a memory table related to the scramble code stored in the manufacturer number memory 302 of the wireless terminal station (FIG. 3B described above), and includes a manufacturer number M721 and a scramble code M722. .

As described above with reference to FIG. 3, each wireless terminal station stores a unique number (telephone number) given to the terminal station in advance at the time of shipment, a manufacturer number, and a scramble code.
When the control CH is received from the radio base station, the manufacturer number is extracted. When the manufacturer number is different from the manufacturer number stored in advance, the extracted manufacturer number and the scramble code based on the manufacturer number are By additionally storing them, a memory table serving as a function of the manufacturing unit number memory 301 as shown in FIG. 7B is configured.
When the control CH is received, the manufacturer number is extracted, and then the control CH is switched to the communication CH, and a scramble code corresponding to the scramble code corresponding to the manufacturer number is set.
Then, communication is established by using a scramble code in which descrambling is set in the synchronization burst on the communication CH.
In this embodiment, a plurality of scramble codes are stored for one manufacturer number, but one scramble code may be used for one manufacturer number.

As described above with reference to FIGS. 4 and 5, the radio base station or radio relay station uses the base station number, relay station number, and manufacturer number and scramble code assigned to the terminal station in advance at the time of shipment. I remember it.
As shown in FIG. 7A, the base station number and the relay station number are registered and stored in advance in the line control storage unit 622 of the control station (M711).
The wireless terminal station whose location is registered in each base station or relay station is stored as the location registration terminal M712 of the base station or relay station.
At that time, when the location registration is performed after the manufacturer number and the scramble code are added in the wireless terminal station, a manufacturer number update flag is set (M713), so that the wireless terminal station has a different manufacturer. It is grasped that it was newly added as a wireless terminal station or registered as a support terminal.
Further, when the wireless terminal station has established communication on the communication CH, the fact (or the scramble code currently used) is stored in the scramble code M714.

FIG. 10 is an example of a data format diagram according to the embodiment of the present invention. FIG. 10A shows an example of a data structure (extract) included in the control channel, and FIG. It is a figure which shows an example of the transmission burst by a channel.
FIG. 10A includes a manufacturer number, a control zone number, a base station number, and a system code regarding the network number information element in the data format in the control channel.
The manufacturer number is a number (code) for identifying the manufacturer that manufactured the station, the control zone number is a number (code) for identifying the control zone, and the base station number is the base station or relay The system code is a unique number (code) indicating an area (for example, an arbitrary municipality) that the control station has jurisdiction over.
FIG. 10B shows a data format of a transmission burst by a communication channel, and is composed of R ramp, P, TCH, SW (synchronization word), I, CC, SACCH, TCH, and G guard.
The portion scrambled by the scramble code is the data portion of TCH (74 bits), SACCH (10 bits), and TCH (54 bits).

FIG. 11 is a second example of a sequence diagram in which communication is established between the wireless terminal station and the wireless base station according to the embodiment of the present invention.
The operation when the wireless terminal station 2-1 is in the area of the wireless base station 20 and the wireless terminal station 1-6 is in the area of the wireless relay station 200 and the location registration is performed will be described.
Here, each area of the radio base station 20 and the radio relay station 200 partially overlaps, relays and amplifies the radio waves of the radio terminal stations in the area of the radio relay station 200, and the second is transmitted via the radio base station 20. The location of the wireless terminal station in the area is registered in the control station 22 and the communication is established.
Also, the wireless terminal station 1-6 in FIG. 2 described above is in a position where both the wireless base station 20 and the wireless relay station 200 can register the position. It is operation | movement description in the case of position registration.

The radio base station 20 and the radio relay station 200 transmit broadcast information to the radio terminal stations in each radio area constantly or at predetermined intervals, and the radio terminal station uses the system code and base station code from the broadcast information. The manufacturer number is extracted together with the (relay station code), the control zone code, etc., and the information such as the system code, base station code, control zone number, etc. stored in the wireless terminal station is updated and stored.
Then, with respect to the extracted manufacturer number, it is determined whether or not there is a match with the manufacturer number stored so far as shown in FIG.
Regardless of the result of the manufacturer number determination, the wireless terminal station determines which radio based on information such as the system code, base station code (relay station code), and control zone number included in the broadcast information. After identifying whether the area is a base station (wireless relay station) area, the location is registered in the memory table of the control station as shown in FIG.
Note that the location registration with the radio relay station is performed by the radio relay station via the radio base station.

Next, establishment of communication between the wireless terminal stations 2-1 and 1-6 in a state where the location registration has been performed will be described.
When making a call from the wireless terminal station 2-1 to the wireless terminal station 1-6, if the number of the called party (unique number of the wireless terminal station 1-6) is input and off-hook (S111-2), the wireless terminal station 2-1, the dial tone starts to flow, and the radio terminal station 2-1 sends the radio status report and the duplex call setting 204 for notifying the radio base station 20 of the radio status information by the control CH. As a response to this, a call setting acceptance 205 is returned to the wireless terminal station 2-1.
The radio base station 20 transmits a paging signal 206 to make an incoming call for individual communication to the radio terminal station 1-6 via the radio relay station 200, and notifies the communication form 206 requested by the caller. As a response to this, an incoming radio status report including an incoming call identification number and communication availability 207 are sent from the radio terminal station 1-6 to the radio base station 20 via the radio relay station 200 via the radio relay station 200.

On the other hand, the radio terminal station 2-1 and the radio base station 20 transmit and receive the synchronization burst (SB1) 208-1 in the communication CH after the call setting acceptance 205 in the control CH described above in order to synchronize with the communication CH. In addition, a radio channel designation 209 including a scramble code for communication CH based on the system code of the radio base station 20 is transmitted and received, and this is used as a scramble code for communication CH on the radio terminal station 2-1 side. In order to perform reception processing, CH switching from the control CH to the communication CH is performed (S111-4).
Next, the communication CH of the radio base station 20 included in the radio channel designation 209 is included in the scramble code for the uplink / downlink communication CH determined from the system code and manufacturer number extracted when the broadcast information is received. A scramble code that can be descrambled is set as a communication CH scramble code value for the wireless terminal station 2-1 (S111-5).
Here, since the wireless terminal station 2-1 has a manufacturer number that matches the manufacturer number included in the received notification information, the scramble code corresponding to the manufacturer number is applied based on the system code. Thus, a scramble code value is set.
Thereafter, the synchronization bursts (SB1 to SB4) 208-1 to 20-4 are exchanged between the wireless terminal station 2-1 and the wireless base station 20 until synchronization is established.

On the other hand, the radio terminal station 1-6 matches the manufacturer number included in the received broadcast information when the incoming radio status report on the control CH and the communication availability 207 are made to the radio relay station 200. Since there is no manufacturer number to be transmitted, a signal indicating that the scramble code cannot be released is included and transmitted.
Then, as shown in FIG. 7B, the extracted manufacturer number is added to the memory table of the wireless terminal station 1-6 and stored.
A synchronization burst (SB1) 208-1 is transmitted from the radio relay station 200 to the radio terminal station 1-6 in the communication CH in order to establish synchronization in the communication CH.
Further, the control channel transmits a radio channel designation 211 including a scramble code for the communication CH based on the system code, and stores the radio channel designation 211 linked to the additionally stored manufacturer number of the radio terminal station 1-6 that has received this. To do.
On this occasion, the radio terminal station 1-6 side performs CH switching from the control CH to the communication CH in order to perform reception processing with the scramble code for the communication CH (S111-6).
Next, the scramble code for the communication CH of the radio relay station 200 included in the radio channel designation 211 is applied to the scramble code for the uplink / downlink communication CH based on the additionally stored system code and manufacturer number, and descrambling is performed. A scramble code that can be used is set as a scramble code value for communication CH of the wireless terminal station 1-6 (S111-7).
Thereafter, exchange of synchronization bursts (SB1 to SB4) 208-1 to 4 is performed between the wireless terminal stations 1-6 and the wireless base station 20 until synchronization is established.

Thus, in the case of the wireless terminal station 2-1, since it is a wireless terminal station originally under the jurisdiction of the second control station 22, the manufacturer number used by the wireless terminal station 2-1 until then is used as it is. Although used, the wireless terminal station 1-6 is not originally a wireless terminal station under the jurisdiction of the second control station 22 (that is, it was originally a wireless terminal station under the jurisdiction of the first control station 21. Therefore, the manufacturer number and the scramble code that the radio relay station 200 has are registered and stored in the manufacturer number that has been used so far, so that communication can be performed on the communication CH even in the area of the radio relay station 200. Is possible.
Note that, when such communication CH is established, the scramble code used by the radio base station 20 and the radio terminal station 2-1 and the radio relay station 200 and the radio terminal station 1-6 are used. Since the scramble code is set independently based on each system code, a different scramble code may be set.

After establishing the synchronization by the communication CH between the radio terminal stations 2-1 and 1-6 and the radio base station 20 and the radio relay station 200 by the above-described operation, the radio base station 20 transmits the radio relay station 200. In order to start the call setting 210 with respect to the wireless terminal station 1-6 that is the receiving station, the data is transmitted on the communication CH.
Then, when the wireless terminal station 1-6 performs a decoding process on the received data using the set communication CH scramble code, a ringing tone sounds, and the wireless terminal station 1-6 passes through the wireless relay station 200 and the wireless base station 20. Then, a call 211 is made to the wireless terminal station 2-1, and the wireless terminal station 2-1 switches from a dial tone to a ringing tone. Thereafter, when the wireless terminal station 1-6 goes off-hook, a call starts, that is, communication is established. Is done.

In the first embodiment of FIG. 1 and the second embodiment of FIG. 2 described above, it is necessary to switch from the control channel to the communication channel when communication is established with another wireless terminal station. At this time, the manufacturer number and the scramble code are additionally stored. However, the manufacturer number and the scramble code may be additionally stored at the time of the position registration operation.
For example, when the broadcast information is received and the manufacturer number is extracted, if the manufacturer number does not match the manufacturer number stored in advance in the wireless terminal station, the extracted manufacturer number is additionally stored.
Then, a transmission request for a scramble code based on the system code is transmitted by being included in the above-described location registration request 202-2, and the radio base station (or radio relay station) that has received this request scrambles the location registration reception 203-2. By transmitting the code including the code, the scramble code is stored as a scramble code based on the system code so as to be linked to the added manufacturer number.

As described above, according to the embodiment of the present invention, for example, when a plurality of municipalities integrate the wireless system itself by administrative actions such as a municipal merger, the control station, the base station, and the relay station do not require major remodeling, etc. It can be handled only by downloading the manufacturer number and the scramble code to the terminal station, and can be a digital mobile radio system integrated using an existing radio system.
In addition, for example, when a neighboring municipality supports or rescues from one municipality, a wireless terminal station that is under the jurisdiction of the current wireless system moves under the jurisdiction of another wireless system. In this case, the digital mobile radio system can use the radio terminal station.
Also, for example, when adding a radio base station or a radio relay station to an existing radio system, or adding a new radio terminal station, etc., it is possible to add each station without hindering the operation of the existing radio system. It is possible to provide an integrated digital mobile radio system.
For example, according to the wireless communication method according to the embodiment of the present invention, the format of the scramble code for uplink / downlink communication CH is determined based on the system code and the manufacturer number, and the communication CH for each terminal station is determined. To provide a radio communication method for a digital mobile radio system that enables reception between terminal stations of systems with different scramble codes for communication CH by changing the scramble code to a scramble code value for communication CH of the base station Can do.

Even if the scramble code for the communication channel (CH) of the wireless terminal station and the wireless base station is the same in the municipality that is under the jurisdiction of one control station, these can be reduced by the merger of municipalities or the support and relief of neighboring municipalities. Integrate one existing wireless system into one, or connect existing wireless terminal stations using existing wireless base stations, or add each station to an already installed wireless system In such a situation, there is a case where communication is not established without switching to the communication CH between the wireless terminal station and the wireless base station, and between multiple wireless systems. This is a digital mobile radio system for smoothly interoperating with the Internet and for smoothly adding each station to an existing radio system.

Further, according to the embodiment of the present invention, in the current one regional disaster prevention system (municipalities), the scramble codes for the communication CH of the terminal station and the base station are the same, but support for municipal merger and neighboring municipalities, When two current wireless systems are integrated into one for rescue, etc., or when communication using existing base stations is assumed, the scramble code for communication CH differs between the terminal station and the base station. Therefore, it is possible to solve the problem that data cannot be restored at the time of reception and communication is impossible.
This determines the format of the scramble code for uplink / downlink communication CH based on the system code and the manufacturer number, and changes the scramble code for communication CH of each terminal station to the scramble code value for communication CH of the base station. Thus, the communication channel scrambling codes of the terminal station and the base station can be set to the same value, and communication between the terminal station and the base station can be established.
Also, in a communication method between a terminal station and a base station, in a receiving method using a communication CH scramble code, the base station system code and manufacturer number (manufacturer code) are extracted from the received broadcast information, and uplink / downlink The format of the scramble code for the communication channel is determined, the base station communication CH scramble code is extracted from the radio channel designation, the setting value is changed, and the scramble code for the communication CH of the terminal station and the base station is matched. This is a terminal station scramble code setting method, whereby wireless communication can be established.
Furthermore, the terminal station determines the radio channel designation by determining the format of the scramble code for uplink / downlink communication CH used by the base station from the system code and manufacturer number included in the broadcast information when receiving the control CH. By extracting the scramble code from the code and changing the setting value, it is possible to receive data on the communication CH.
This means that even if the base station manufacturer is different and each scramble code is uniquely set by the manufacturer, it can be re-set and operated on the terminal side.

As described above, the present invention is effective with respect to a digital mobile radio system used for municipal disaster prevention, in particular, a channel codec of a receiver of a radio terminal station.
This is because the radio terminal station changes the scramble code of the radio terminal station based on the broadcast information transmitted from the radio base station at the time of reception at the radio terminal station. A digital mobile radio system capable of establishing communication under the system can be provided.

1 is a first example of a sequence diagram in which communication is established between a radio terminal station and a radio base station according to an embodiment of the present invention. The example of the block diagram of the digital mobile radio | wireless system which is embodiment of this invention. It is an example of the block diagram of the radio | wireless terminal station which is embodiment of this invention, (a) is an example of a hardware block diagram, (b) is a functional block diagram regarding radio | wireless control. An example of the block diagram of the wireless base station which is embodiment of this invention. An example of the block diagram of the radio relay station which is embodiment of this invention. An example of the block diagram of the control station which is embodiment of this invention. It is a memory table figure regarding the scramble code | symbol which is embodiment of this invention, (a) is a table figure of a control station, (b) is a table figure of a radio | wireless terminal station. The example of a block diagram of the conventional digital mobile radio system. An example of a sequence diagram in which communication is established between a conventional wireless terminal station and a wireless base station. It is an example of the data format figure which is embodiment of this invention, (a) is the data structure (extract) contained in a control channel, (b) is the transmission burst figure by a communication channel. The 2nd Example of the sequence diagram by which communication establishment between the radio | wireless terminal station and radio | wireless base station which is embodiment of this invention is made | formed.

Explanation of symbols

31: control unit, 32: storage unit, 33: operation unit, 34: microphone, 35: display unit, 36: speaker, 37: wireless unit,
301: Scramble / descramble processing unit, 302: Manufacturer code memory, 303: Frame decomposition unit, 304: Frame synchronization unit, 305: Frame configuration unit (radio terminal station)
41: control unit, 42: storage unit, 47: interface, 43: transmission unit, 44: reception unit (the radio base station),
51: control unit, 52: storage unit, 53: transmission unit, 54: reception unit (above wireless relay station),
611: Control unit, 621: Data storage unit, 63: Operation unit, 64: Microphone, 65: Display unit, 66: Speaker, 612: Line control unit, 622: Line control storage unit, 67: Interface, 63: Operation unit 64: microphone, 65: display section, 66: speaker (control station),
21: First control station 21, 22: Second control station,
10 (10-1, 10-2, ..., 10-n): a radio base station,
100 (100-1, 100-2, ..., 100-n): wireless relay station,
20 (20-1, 20-2, ..., 20-n): a radio base station,
200 (200-1, 200-2, ..., 200-n): wireless relay station,
1-1, 1-2,..., 1-n: wireless terminal station,
2-1, 2-2, ..., 2-n: wireless terminal station,
81: Control Bureau,
810-1, 810-2: wireless base station,
8100-1, 8100-2, 8100-3: wireless relay station,
80-1, 80-2, ..., 80-n: wireless terminal stations.

Claims (5)

In a digital mobile radio system in which at least one radio base station and a plurality of radio terminal stations form communication links,
Means for the wireless base station to transmit broadcast information including a manufacturer code on a control channel;
A radio terminal station that has received the broadcast information on a control channel, means for extracting a scramble code of a communication channel used by the radio base station from the manufacturer code;
Means for channel switching from the control channel to the communication channel;
Scramble code setting means for performing descrambling by the communication channel by setting the extracted scramble code,
The digital mobile radio system, wherein the radio terminal station establishes a communication link by a scramble code based on a manufacturer code of the radio base station. In a digital mobile radio system for disaster prevention in municipalities in which at least one control station, at least one radio base station connected to the control station, and a plurality of radio terminal stations form communication links,
Means for transmitting notification information including a manufacturer code by the radio base station through a control channel;
The wireless terminal station that has received the broadcast information on the control channel, means for extracting the format of the scramble code of the communication channel used by the wireless base station from the manufacturer code;
Means for channel switching from the control channel to the communication channel;
Scramble code setting means for performing descrambling by the communication channel by setting the extracted scramble code,
The digital mobile radio system for disaster prevention of a municipality characterized in that the radio terminal station establishes a communication link with a control station or another radio terminal station by a scramble code based on the manufacturer code of the radio base station. Any one of the wireless base stations is wirelessly connected to a wireless relay station,
The radio base station and the radio relay station each have a unique base station code or relay station code, and transmit a system code based on these base station code or relay station code included in the broadcast information,
The wireless terminal station that has received the broadcast information extracts the manufacturer code of the wireless base station or the wireless relay station, and extracts the base station code or the relay station code,
The digital code according to claim 1 or 2, further comprising scramble code setting means for setting a scramble code using the extracted manufacturer code and a system code based on the base station code or the relay station code. Mobile radio system. When any of the plurality of wireless terminal stations establish a communication link via a wireless base station or a wireless relay station,
The manufacturer code is transmitted / received by including the manufacturer code of the radio base station or radio relay station in the broadcast information,
The digital mobile radio system according to claim 3, wherein the scramble code is set independently for each radio terminal station. In a digital mobile radio system in which at least one radio base station and a plurality of radio terminal stations form communication links,
Each of the plurality of wireless terminal stations is
A memory table in which a manufacturer code and a scramble code are stored in advance is provided.
When broadcast information transmitted by the at least one radio base station is received by a control channel, if the manufacturer code included in the broadcast information is not the manufacturer code stored in advance, the manufacturer code of the radio base station And a scramble code are additionally stored in the memory table,
A scramble code is set based on the additionally stored manufacturer code,
A digital mobile radio system characterized by establishing radio communication on a communication channel.